Accession number:20211210126260 Title:Hydrochemical and Isotopic Characteristics in the Shallow Groundwater of the Fenhe River Basin and Indicative Significance Title of translation:汾河流域浅层地下水水化学和氢氧稳定同位素特征及其指示意义 Authors:Liu, Xin (1); Xiang, Wei (1); Si, Bing-Cheng (1, 2) Author affiliation:(1) Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling; 712100, China; (2) Department of Soil Science, University of Saskatoon, SK; S7N 5A8, Canada Corresponding author:Si, Bing-Cheng(bing.si@usask.ca) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1739-1749 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Fenhe River basin is the second largest tributary of the Yellow River. Piper diagrams, Gibbs, PCA, correlation analysis and forward derivation modeling were used to analyze the distribution characteristics and the controlling factors of the groundwater chemistry and stable isotopes in the Fenhe River basin, which revealed the water cycle and water quality evolution process. The results indicated that the groundwater is a weakly alkaline, micro-hard water, the dominant anions and cations are HCO3- and Ca2+, the major groundwater types are Mg-Ca-HCO3 and Mg-Ca-Cl-SO4, the groundwater quality is good, and more than 94% of the samples belong to classes Ⅰ-Ⅲ. The average values of δD and δ18O of the Fenhe River groundwater are -70.2‰ and -9.6‰, which are similar to the isotope values of the precipitation from July to September, indicating that the groundwater may have originated from this period and that the groundwater recharge mode (dominant flow and piston flow) has a spatial variation. Rock weathering is the dominant source of ions in the groundwater, with an average contribution of 87%, while the contributions of atmospheric input and human activity are 8% and 5%, respectively. For rock weathering, silicate, evaporate, and carbonate rock contribute equally to the groundwater solutes, accounting for 32%, 28%, and 26%, respectively. The results of this study provide the basis for promoting the sustainable development and utilization of groundwater resources in the Fenhe River basin.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:Hydrochemistry Controlled terms:Alkalinity - Calcium compounds - Chemical analysis - Chlorine compounds - Groundwater - Groundwater resources - Isotopes - Magnesium compounds - Quality control - Rivers - Silicates - Water quality - Watersheds - Weathering Uncontrolled terms:Controlling factors - Correlation analysis - Development and utilizations - Distribution characteristics - Ground water recharge - Groundwater chemistry - Isotopic characteristics - Shallow groundwater Classification code:444.1 Surface Water - 444.2 Groundwater - 445.2 Water Analysis - 481.2 Geochemistry - 801.1 Chemistry, General - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 2.60e+01%, Percentage 2.80e+01%, Percentage 3.20e+01%, Percentage 5.00e+00%, Percentage 8.00e+00%, Percentage 8.70e+01%, Percentage 9.40e+01% DOI:10.13227/j.hjkx.202008315 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126255 Title:Spatiotemporal Change and Source Apportionment of Non-point Source Nitrogen and Phosphorus Pollution Loads in the Three Gorges Reservoir Area Title of translation:三峡库区非点源污染氮磷负荷时空变化及其来源解析 Authors:Li, Ming-Long (1); Jia, Meng-Dan (1); Sun, Tian-Cheng (1); Chu, Lin (1); Li, Zhao-Xia (1) Author affiliation:(1) College of Resources and Environment, Huazhong Agricultural University, Wuhan; 430070, China Corresponding author:Chu, Lin(chulin@mail.hzau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1839-1846 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Three Gorges Reservoir area (TGRA) is a critical water source protection area in China and one of the regions with rapid economic development in the Yangtze River basin. Non-point source pollution is the leading cause of the deterioration of the water environment in the TGRA; therefore, studying the non-point source pollution status in the TGRA is of great significance to the regional ecological security and sustainable development. The improved export coefficient model was used to estimate the total non-point source nitrogen and phosphorus pollution loads in the TGRA from 1990 to 2015, the spatial and temporal characteristics of the non-point source nitrogen and phosphorus pollution were analyzed, and the primary sources of pollution were determined by calculating the contribution rate of each pollution source. The results concluded that the nitrogen and phosphorus pollution loads were highest in the hinterland of the reservoir, followed by the end of the reservoir, with the lowest in the head of the reservoir, showing significant spatial heterogeneity in the TGRA. The total loads of nitrogen and phosphorus pollution increased firstly and then decreased, which reached the highest value in 2000 and the lowest value in 2015. The contribution rate of each pollution source to the nitrogen and phosphorus pollution loads, from highest to lowest, were land use, rural life, livestock, and poultry farming. Among them, the land use type of dry land was the predominant source of non-point source nitrogen and phosphorus pollution.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:River pollution Controlled terms:Agriculture - Deterioration - Economics - Land use - Nitrogen - Phosphorus - Reservoirs (water) - Sustainable development Uncontrolled terms:Export coefficient models - Nitrogen and phosphorus - Non-point source pollution - Spatial heterogeneity - Spatio-temporal changes - Temporal characteristics - Three gorges reservoir area - Three Gorges Reservoir Area(TGRA) Classification code:403 Urban and Regional Planning and Development - 441.2 Reservoirs - 453 Water Pollution - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 951 Materials Science - 971 Social Sciences DOI:10.13227/j.hjkx.202008095 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651090 Title:Analysis of Ultraviolet Aerosol Index in Guangdong-Hong Kong-Macao Greater Bay Area Title of translation:粤港澳大湾区吸收性气溶胶的解析 Authors:Duan, Jia-Le (1); Ju, Tian-Zhen (1); Huang, Rui-Rui (1); Liang, Zhuo-Hong (1); Fan, Jia-Chen (1) Author affiliation:(1) Key Laboratory of Resource Environment and Sustainable Development of Oasis, Gansu Province, College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China Corresponding author:Ju, Tian-Zhen(3221259903@nwnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3652-3662 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study examines the current aerosol pollution scenario in the Guangdong-Hong Kong-Macao (GHM) Greater Bay Area, based on OMAERUV daily data products, to define the spatial and temporal distribution from 2008 to 2019 and predict variation trends of the ultraviolet aerosol index (UVAI). Changes and potential source areas were analyzed, and their influencing factors were identified. The annual time series of UVAI in the GHM Greater Bay Area showed a downward trend, with an average annual decrease of 2.3%; the monthly time series showed an inverted "V" shape beginning in spring, with the highest seasonal UVAI occurring in spring, followed by winter and autumn. Summer exhibited the lowest UVAI; spatially, the central region has consistently exhibited high values, with an average annual UVAI of 0.35 calculated over 12 years. The distribution of UVAI in the time series is mainly sustainable, and 82.69% of the area will show a downward trend in the future. The main potential sources from beyond the study area are carbon sources and marine biological sources produced by eastern industry; the main potential sources of UVAI are carbon and biomass sources in spring, biomass aerosol sources in summer, and carbon sources in autumn. It accounts for the largest proportion, and aerosol sources of sand and dust in winter have increased. Through correlation analysis, aerosols and PM2.5 were found to be interdependent. Industrial production activities are an important contributor of atmospheric aerosols, and precipitation can reduce the atmosphere. Due to the aerosol content produced by industrial production, secondary industrial activities will accelerate the formation of aerosols when the temperature rises.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Air pollution Controlled terms:Atmospheric aerosols - Carbon - Marine industry - Springs (components) - Time series Uncontrolled terms:Annual time series - Biological sources - Correlation analysis - Industrial activities - Industrial production - Potential sources - Spatial and temporal distribution - Temperature rise Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 601.2 Machine Components - 804 Chemical Products Generally - 922.2 Mathematical Statistics Numerical data indexing:Age 1.20e+01yr, Percentage 8.27e+01% DOI:10.13227/j.hjkx.202012203 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003349 Title:Influence of Storm Runoff on the Spectral Characteristics of Dissolved Organic Matter (DOM) in a Drinking Water Reservoir During the Flood Season Title of translation:汛期暴雨径流对饮用水水库溶解性有机质(DOM)光谱特征的影响 Authors:Li, Cheng-Yao (1, 2); Huang, Ting-Lin (1, 2); Wen, Cheng-Cheng (1, 2); Liang, Wei-Guang (1, 2); Lin, Zi-Shen (1, 2); Yang, Shang-Ye (1, 2); Li, Kai (1, 2); Cai, Xiao-Chun (3) Author affiliation:(1) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Lijiahe Reservoir Management Co. Ltd., Xi'an; 710016, China Corresponding author:Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1391-1402 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the influence of storm runoff on reservoir organic matter during the flood season, the Lijiahe Reservoir was selected to analyze variations in the content and components of dissolved organic matter (DOM) during four periods (before runoff, flood peak period, 1 week after runoff, and 6 weeks after runoff) using three-dimensional fluorescence spectroscopy parallel factor analysis (EEMs-PARAFAC) and ultraviolet-visible (UV-Vis) spectra. The results showed that: ① the turbidity and DOC content of the reservoir increased significantly during the flood peak period (P<0.01) and gradually decreased thereafter; ② the UV-Vis spectrum characteristics showed that a(254) and a(355) were significantly increased in the flood peak period (P<0.01) while E2/E3 and E3/E4 were significantly decreased (P<0.01), indicating that the concentration, relative molecular weight, and degree of DOM humification in the reservoir were increased by storm runoff; ③ four DOM components were identified as terrestrial humus (C1 and C2), microbial humus (C3), and a tryptophan-like component (C4). The fluorescence intensity of the C1-C3 components increased significantly during the flood peak period (P<0.05), indicating that the increase in the DOM humic-like component was caused by the storm runoff. At the same time, a decrease in the fluorescence intensity of the C1-C4 components was observed after the flood peak period, indicating that DOM continuously settled and degraded after runoff; and ④ Pearson's correlation analyses showed that DOM fluorescence intensity and turbidity were significantly correlated (r>0.467, P<0.05), indicating that the observed decrease in DOM content was related to the sedimentation of suspended solids. A principal component analysis (PCA) showed that the water quality in the reservoir reflected the observed characteristics during the different runoff periods. Overall, this study reveals the effects of the storm runoff on DOM content and its components over the short and long term, providing scientific support for the management of drinking water quality.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Reservoirs (water) Controlled terms:Amino acids - Biogeochemistry - Correlation methods - Flood control - Floods - Fluorescence - Fluorescence spectroscopy - Organic compounds - Potable water - Quality control - Runoff - Soils - Storms - Turbidity - Water quality Uncontrolled terms:Correlation analysis - Dissolved organic matters - Fluorescence intensities - Parallel factor analysis - Spectral characteristics - Suspended solids - Three-dimensional fluorescence spectroscopies - Ultraviolet-visible spectra Classification code:441.2 Reservoirs - 442.1 Flood Control - 443.3 Precipitation - 444 Water Resources - 444.1 Surface Water - 445.2 Water Analysis - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics Numerical data indexing:Age 1.15e-01yr DOI:10.13227/j.hjkx.202007276 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066048 Title:Impact of Enclosure Culture on Heavy Metal Content in Surface Sediments of Hongze Lake and Ecological Risk Assessment Title of translation:洪泽湖围栏养殖对表层沉积物重金属含量影响与生态风险评价 Authors:Zi, Xin-Yuan (1, 2); Zhang, Ming (3); Gu, Xiao-Hong (2); Kan, Ke-Cong (1, 2); Mao, Zhi-Gang (2); Chen, Hui-Hui (2); Zeng, Qing-Fei (2) Author affiliation:(1) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 101408, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Gaochun District Water Authority Bereau, Nanjing; 211300, China Corresponding author:Zeng, Qing-Fei(qfzeng@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5355-5363 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to explore the concentrations of heavy metals and the influence of fencing on Hongze lake, the content, source, and spatial distribution characteristics of heavy metals in surface sediments and ecological risks were analyzed in 2018 after part of the fence around Hongze Lake was removed. The results showed that the average contents of Cr, Ni, Cu, Zn, As, Cd, and Pb in the surface sediments in Hongze Lake were 66.78, 33.89, 25.35, 74.77, 16.55, 0.23, and 27.20 mg•kg-1, respectively. Cr, Ni, Cu, Zn, and Pb contents were at non-polluting levels, with As and Cd at the lowest level, based on the accumulation index evaluation. Except for Cd, all the elements showed low potential ecological risk. The results showed that the heavy metal content in the fenced, dismantled, and peripheral areas increased and accumulated towards the center of the lake. The removal of the fence did not significantly reduce the heavy metal content in the short-term. Overall, Hongze Lake presented a state of low ecological risk. In the future, environmental policies should include surface sediment accumulation areas and fencing culture in the north and northeast of Hongze Lake.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Heavy metals Controlled terms:Ecology - Environmental protection - Fences - Lakes - Risk assessment - Surficial sediments Uncontrolled terms:Distribution characteristics - Ecological risk assessment - Ecological risks - Environmental policy - Fence culture - Heavy metals content - Hongze lakes - Index evaluations - Potential ecological risk - Surface sediments Classification code:454.2 Environmental Impact and Protection - 454.3 Ecology and Ecosystems - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass 2.72E-05kg DOI:10.13227/j.hjkx.202012131 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239911 Title:Investigation on Fluoroquinolone Resistance Genes in the Intensive Aquaculture Area of Shatianhu Intensive Aquiculture Farm and Surrounding Waterbodies in Shanghai, China Title of translation:上海沙田湖养殖区及周边水体中氟喹诺酮类抗性基因的分布特征及其与环境因子关系 Authors:Xu, Mu (1); Li, Shi-Hao (1); Ma, Jin (1); Wang, Li-Qing (1, 2); Zhang, Wei (1, 2, 3) Author affiliation:(1) Center for Research on Environmental Ecology and Fish Nutrient(CREEFN) of Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai; 201306, China; (2) Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai; 201306, China; (3) Department of Aquatic Biology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai; 201306, China Corresponding authors:Zhang, Wei(weizhang@shou.edu.cn); Zhang, Wei(weizhang@shou.edu.cn); Zhang, Wei(weizhang@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5848-5856 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Intensive aquaculture areas are often considered to be an important potential source of antibiotics and resistance genes in water bodies. However, the contamination of antibiotics and resistance genes in this type of water remains largely uninvestigated. In this study, the type and abundance of fluoroquinolones (FQs) and fluoroquinolones antibiotic resistance genes (FQs-ARGs) were investigated in Shatianhu intensive aquiculture farm and the surrounding water bodies in September 2020 by using metagenomics high-throughput sequencing technology. Furthermore, the influence of water physical and chemical factors and FQs on FQs-ARGs was studied by using multivariate statistical analysis methods. The results showed that there were five types of resistance mechanisms and 46 kinds of FQs-ARGs in the culture area of Shatianhu intensive aquiculture farm and the surrounding water bodies, and there were 44 genes in each water body. Both mfd and patA were dominant resistance genes in the aquaculture water and surrounding water bodies, and variation or mutation of antibiotic resistance genes was the dominant resistance mechanism. Moreover, there was no significant difference in the average abundance of FQs-ARGs among the aquaculture water bodies, the surrounding rivers and lakes, and water bodies of different culture species. The result of partial canonical ordination analysis (pRDA) showed that in addition to norfloxacin and ciprofloxacin, specific conductance (Spc), total phosphorus (TP), total nitrogen (TN), ammonia nitrogen (NH4+-N), dissolved oxygen (DO), pH, and Chlorophyll a (Chl-a) were key factors that affected the composition and distribution of FQs and ARGs in water bodies, and the total contribution rate of the latter was far higher than that of antibiotics themselves.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Antibiotics Controlled terms:Ammonia - Aquaculture - Chemical analysis - Dissolved oxygen - Genes - Multivariant analysis - Nitrogen Uncontrolled terms:Antibiotic resistance genes - Aquaculture water - Environmental factors - Fluoroquinolone resistance gene - Fluoroquinolones - Intensive aquacultures - Metagenomics - Resistance genes - Shatianhu intensive aquiculture farm - Waterbodies Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.3 Agricultural Methods - 922 Statistical Methods DOI:10.13227/j.hjkx.202104225 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239992 Title:Removal of Ammonia Nitrogen from Polyvinyl Alcohol/Sodium Alginate Fixed Micron Zeolite Powder in Black and Smelly Rivers Title of translation:黑臭河道中聚乙烯醇/海藻酸钠固定微米沸石粉去除氨氮 Authors:Wei, Chao (1, 2, 3); Chen, Tao (1, 2, 3); Jiang, Qiao (1, 2, 3); Wang, Shu (1, 2, 3); Qiu, Wei-Jian (4); Cheng, Xiao-Ying (1, 2, 3) Author affiliation:(1) School of Environment and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Jiangsu Province Key Laboratory of Anaerobic Biotechnology, Wuxi; 214122, China; (3) Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215000, China; (4) Wuxi Taihu Lake Restoration Co., Ltd., Wuxi; 214122, China Corresponding authors:Cheng, Xiao-Ying(439174716@qq.com); Cheng, Xiao-Ying(439174716@qq.com); Cheng, Xiao-Ying(439174716@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5884-5895 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Using polyvinyl alcohol and sodium alginate to fix micron zeolite powder, the effect and mechanism of ammonia nitrogen removal by water beads were explored through batch adsorption experiments. The results showed that when the dosage of PAZ-20 exceeded 10 g•L-1, the ammonia nitrogen removal rate reached above 80%. When the pH was 3-8, the increase in pH had little effect on the adsorption of ammonia nitrogen by PAZ. When the pH increased from 9 to 11, the removal rate of ammonia nitrogen decreased significantly with the increase in pH. The optimal pH for PAZ adsorption of ammonia nitrogen was 7. When the water temperature was 5-25℃, the removal rate of ammonia nitrogen gradually increased with the increase in temperature, and it rose slightly within 25-35℃. When the water temperature rose to 40℃, the removal rate of ammonia nitrogen decreased. The quasi-second-order kinetic equation and Langmuir adsorption isotherm model could better fit the PAZ adsorption of ammonia nitrogen. The adsorption capacity of PAZ-20 for cations in the water was K+>Mg2+>Na+>Ca2+. The order of the effect of coexisting cations on the removal of ammonia nitrogen from PAZ-20 was K+>Na+>Ca2+>Mg2+. The results of Scanning Electron Microscopy and Fourier Infrared Spectroscopy showed that the micron zeolite powder was well fixed in polyvinyl alcohol/sodium alginate. PAZ could be used for the treatment of black and smelly rivers with little interference from coexisting cations.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Zeolites Controlled terms:Ammonia - Gas adsorption - Infrared spectroscopy - Integral equations - Nitrogen removal - Polyvinyl alcohols - Positive ions - Scanning electron microscopy - Sodium - Sodium alginate - Temperature Uncontrolled terms:Ammonia-nitrogen - Ammonia-nitrogen removals - Batch adsorption experiments - Ca 2+ - Coexisting cations - Micron zeolite - Nitrogen removal rates - Water temperatures - Zeolite powder Classification code:549.1 Alkali Metals - 641.1 Thermodynamics - 802.3 Chemical Operations - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 815.1.1 Organic Polymers - 921.2 Calculus Numerical data indexing:Mass 1.00E-02kg, Percentage 8.00E+01% DOI:10.13227/j.hjkx.202101211 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066055 Title:Accumulation Characteristics and Dietary Exposure Estimation of Heavy Metals in Vegetables from the Eastern Coastal Region of China Title of translation:我国东部沿海地区蔬菜中重金属累积分布特征及居民膳食暴露评估 Authors:Sun, Shuai (1, 2); Geng, Ning-Bo (1); Guo, Cui-Cui (1, 2); Zhang, Bao-Qin (1); Lu, Xian-Bo (1); Zhang, Hai-Jun (1); Chen, Ji-Ping (1) Author affiliation:(1) Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian; 116023, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Geng, Ning-Bo(gengningbo@dicp.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5519-5525 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The levels of six toxic metals and five essential metals in five groups of vegetables marketed in the eastern coastal region of China were analyzed using inductively coupled plasma mass spectrometry. The results showed that the concentrations of six toxic heavy metals in all the vegetables did not exceed the maximum residue limits. The health risk assessment indicated that consumption of vegetables may not pose a potential noncarcinogenic risk to consumers, while there is a carcinogenic risk level of 10-5 level from inorganic arsenic exposure through vegetable consumption. Additionally, a similar trend was observed for the accumulation of toxic and essential metals. Furthermore, compared with other vegetable groups, edible fungi have a high potential to accumulate toxic and essential metals, which indicates that pollution monitoring of edible fungi should be strengthened.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Vegetables Controlled terms:Coastal zones - Fungi - Health risks - Heavy metals - Mass spectrometry - Risk assessment Uncontrolled terms:Accumulation characteristics - Coastal regions - Dietary exposure - Eastern coastal region - Edible fungus - Essential metals - Exposure estimation - Inductively coupled plasma-mass spectrometry - Toxic heavy metals - Toxic metals Classification code:461.7 Health Care - 471 Marine Science and Oceanography - 531 Metallurgy and Metallography - 801 Chemistry - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202102147 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065970 Title:Distribution and Influencing Factors of DOM Components in Urban and Suburban Polluted Rivers Title of translation:城镇与城郊污染河道中DOM成分分布与影响因素 Authors:Zhu, Yi (1); Chen, Hao (2); Ding, Guo-Ping (3); Sun, Xiao-Nan (3); Liu, Hui (2); Ye, Jian-Feng (2) Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) College of Engineering, Shanghai Polytechnic University, Shanghai; 201209, China Corresponding author:Ye, Jian-Feng(yejf99@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5264-5274 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Dissolved organic matter(DOM)in water environments is an important component of the global carbon cycle. Under the current urgency to control the pollution of urban rivers in China, exploring the influence of different exogenous and endogenous secondary pollution and weather patterns on river DOM is the premise to better understand the causes of the pollution. In this study, a large city in China was established as the research area, and the underlying water and sediments from 21 sites along urban and suburban rivers, and other water sources were evaluated. The excitation-emission matrix-parallel factor analysis(EEM-PARAFAC)was used to analyze the difference in DOM composition and equivalent in urban rivers polluted by domestic sewage and suburban rivers polluted by aquaculture, agriculture, and livestock breeding. The results showed that: ① DOM components in urban and suburban river waters were mainly protein compounds(tyrosine-and tryptophan-like), containing a small amount of humic acid. Humic acid components of anthropogenic origin were found in urban river water; ② The reasons for the formation of DOM components in urban and suburban rivers were completely different. Urban rivers are mainly polluted by domestic sewage and endogenous secondary pollution, resulting in an increase in anthropogenic humic acid components. Suburban rivers are mainly polluted by agricultural wastewater rich in N and P, which promotes endogenous metabolism of autotrophic bacteria and increases protein components, which may be related to the formation of existing DOM characteristics. ③ Rainfall runoff and urban overflow transported exogenous pollutants into rivers, while hydrodynamic factors such as hydraulic agitation affect the distribution of DOM components in underlying water and sediments through physical effects such as dilution.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Luminescence of liquids and solutions Controlled terms:Agricultural robots - Agriculture - Amino acids - Bacteria - Biogeochemistry - Factor analysis - Multivariant analysis - Proteins - River pollution - Rivers - Runoff - Sewage - Urban growth - Water pollution control Uncontrolled terms:Agricultural wastewater - Agricultural wastewater pollution - Dissolved organic matters - Excitation emission matrices - Excitation-emission matrix-parallel factor analyse - Parallel factor analysis - Sewage pollutions - Suburban rivers - Urban river - Wastewater pollution Classification code:403.1 Urban Planning and Development - 442.1 Flood Control - 444.1 Surface Water - 452.1 Sewage - 453 Water Pollution - 453.2 Water Pollution Control - 481.2 Geochemistry - 731.5 Robotics - 741.1 Light/Optics - 801.2 Biochemistry - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment - 922 Statistical Methods - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids DOI:10.13227/j.hjkx.202104041 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065991 Title:Progress in the Interactions of Ozone Pollution and Other Environmental Stress on Urban Forests in China Title of translation:地表臭氧污染与其他环境因子复合胁迫对中国城市森林的影响研究进展 Authors:Li, Pin (1); Yuan, Xiang-Yang (2); Dai, Lu-Lu (3); Feng, Zhao-Zhong (4) Author affiliation:(1) Research Center for Urban Forestry, Beijing Forestry University, Beijing; 100083, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing; 100125, China; (4) School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5075-5085 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Ground-level ozone pollution(O3)and climate change have become key global problems threatening the environment and sustainable development of urban forests. At present, various studies have assessed the O3 impacts on trees; however, it is difficult to accurately evaluate the complex ecological effects caused by multiple factors on the natural urban environment. In this paper, the interactions between O3 and carbon dioxide(CO2), drought, nitrogen deposition, and warming, as well as the effects of the physiology, biochemistry, and growth of urban trees in China were reviewed. Elevated CO2 could alleviate the negative effects of elevated O3 on the photosynthetic metabolism, antioxidant system, and growth of trees. There is a complex interaction between O3 and drought, which may synergistically aggravate, alleviate, or have no effect on trees. However, there was no correlation between O3 and N deposition, only a significant interaction between elevated temperatures and O3, which slowed down the adverse effects of O3 on tree growth and photosynthesis. Finally, suggestions are put forward to manage and sustainable develop urban forests in China under future climate change and air pollution.
© 2021, Science Press. All right reserved. Number of references:76 Main heading:Carbon dioxide Controlled terms:Air pollution - Climate change - Drought - Forestry - Nitrogen - Ozone - Sustainable development - Urban growth Uncontrolled terms:Combined stress - Ecological effect - Elevated carbon dioxide - Environmental stress - Global problems - Ground-level ozone - Ground-level ozone pollution - Nitrogen deposition - Ozone pollution - Urban forests Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 443.3 Precipitation - 444 Water Resources - 451 Air Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.0 Woodlands and Forestry DOI:10.13227/j.hjkx.202103240 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066047 Title:Effects of Spartina alterniflora Invasion on Soil Phosphorus Forms in the Jiaozhou Bay Wetland Title of translation:互花米草入侵对胶州湾湿地土壤磷赋存形态的影响 Authors:Sha, Meng-Qiao (1); Chai, Na (1); Zhao, Hong-Tao (2); Liu, Chun-Jing (1); Ding, Wen-Chao (1); Xie, Wen-Xia (1) Author affiliation:(1) College of Environmental Sciences and Engineering, Qingdao University, Qingdao; 266071, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Xie, Wen-Xia(xwx080312@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5414-5423 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the effects of Spartina alterniflora invasion on soil phosphorus(P)cycling in coastal wetlands, we selected a S. alterniflora zone(SA zone)and mudflat zone(MF zone)in the Jiaozhou Bay as the target areas for the study. The variability of total phosphorus(TP), inorganic phosphorus(IP), and their component contents in wetland soils after S. alterniflora invasion and their influencing factors was evaluated. The results showed that the average contents of TP(472.70 mg•kg-1)and IP(239.00 mg•kg-1)in the soils were significantly higher than those of TP(386.19 mg•kg-1)and IP(212.68 mg•kg-1)in the pre-invasion area, with an increase of 22.40% and 12.38%, respectively. The IP fractions in the study area were dominated by calcium-phosphorus(Ca-P)and iron-phosphorus(Fe-P), accounting for 45%-61% and 31%-49% of IP, respectively. The Ca-P content of the soil in the 10-30 cm layer decreased significantly(P<0.05)after S. alterniflora invasion, which was especially significant in July. The Fe-P content increased significantly(P<0.05); in the 0-40 cm soil layer, Fe-P was higher than that in the 40-60 cm layer(P<0.05), and showed significant enrichment in the 10-40 cm soil in July. The structural equation model showed that organic matter(OM)had a significant positive effect on TP and Fe-P after S. alterniflora invasion(P<0.01), and the normalized path coefficients were 0.775 and 0.724, respectively. Fe-P had a significant negative effect on Ca-P after invasion(P<0.01)with a normalised throughput coefficient of -0.435. The study found that S. alterniflora invasion generally increased wetland soil P content, while promoting the conversion of Ca-P to Fe-P, improving wetland P bioavailability.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Wetlands Controlled terms:Biochemistry - Calcium compounds - Iron compounds - Phosphorus - Soils Uncontrolled terms:Inorganic phosphorus - Inorganic phosphorus component - Jiaozhou Bay - P contents - Phosphorus form - Soil phosphorus - Spartina alterniflora - Structural equation models - Total phosphorus - Wetland soils Classification code:483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 804 Chemical Products Generally Numerical data indexing:Mass 2.1268E-04kg, Mass 2.39E-04kg, Mass 3.8619E-04kg, Mass 4.727E-04kg, Percentage 1.238E+01%, Percentage 2.24E+01%, Percentage 3.10E+01% to 4.90E+01%, Percentage 4.50E+01% to 6.10E+01%, Size 0.00E00m to 4.00E-01m, Size 1.00E-01m to 3.00E-01m, Size 1.00E-01m to 4.00E-01m, Size 4.00E-01m to 6.00E-01m DOI:10.13227/j.hjkx.202103203 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650988 Title:Evaluation of Air Pollution Characteristics and Air Quality Improvement Effect in Beijing and Chengdu Title of translation:北京与成都大气污染特征及空气质量改善效果评估 Authors:Dang, Ying (1); Zhang, Xiao-Ling (1); Rao, Xiao-Qin (2); Kang, Ping (1); He, Jian-Jun (3); Lu, Ning-Sheng (1); Hua, Ming (4); Xiang, Wei-Guo (1) Author affiliation:(1) Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu; 610225, China; (2) Environmental Meteorological Center of China Meteorological Administration, Beijing; 100081, China; (3) Chinese Academy of Meteorological Sciences, Beijing; 100081, China; (4) Chengdu Meteorological Bureau, Chengdu; 610072, China Corresponding author:Zhang, Xiao-Ling(xlzhang@ium.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3622-3632 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In recent years, China's air quality has been improving, and the concentration of atmospheric particulate matter has decreased significantly. In this study, the pollution characteristics and trends of two typical representative cities (Beijing and Chengdu) were analyzed. The geographical locations, pollution emissions, and meteorological diffusion conditions of the two cities were compared, to evaluate the relative contribution of meteorological conditions and pollution reduction regulations in decreasing fine particulate matter (PM2.5) concentrations. The results showed that the number of heavily polluted days and pollution episodes in Beijing and Chengdu decreased significantly from 2013 to 2018, and the concentration of SO2 and PM2.5 decreased substantially. Compared to 2013, SO2 concentration in Beijing and Chengdu has decreased by 77.8% and 70.9%, whereas PM2.5 concentration has decreased by 42.7% and 48.5%, respectively. The largest reduction appeared in winter, when PM2.5 decreased at an annual rate of 13.5 μg•m-3 for Beijing and 14.1 μg•m-3 for Chengdu. During the study period, the wind speed in Chengdu was less than that in Beijing, temperature was approximately 3℃ higher, and static wind in winter was more frequent. A significantly lower mixed-layer height, atmospheric capacity index, and ventilation coefficient in Chengdu resulted in more unfavorable atmospheric diffusion conditions. The static and stable weather index and the environmental meteorological index (EMI) also showed that the atmospheric diffusion conditions were better in Beijing than in Chengdu. The EMI of the two cities showed a decreasing trend during the study period, and the decline in EMI in Chengdu was the most significant in 2018, indicating an evident improvement in meteorological conditions. In 2018, emission reductions are estimated to have contributed 33.5% and 24% to the decrease in PM2.5 in Beijing and Chengdu, respectively, and meteorological conditions contributed 7.2% and 11.1% to the reduction in these two cities. In winter, emission reductions respectively contributed 31.7% and 32.5% to reduction in Beijing and Chengdu, while meteorological conditions made a larger contribution.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Particles (particulate matter) Controlled terms:Air quality - Diffusion - Emission control - Quality control - Sulfur dioxide - Wind Uncontrolled terms:Air quality improvement - Atmospheric diffusion - Atmospheric particulate matter - Fine particulate matter (PM2.5) - Geographical locations - Meteorological condition - Meteorological index - Relative contribution Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control - 951 Materials Science Numerical data indexing:Percentage 3.17e+01%, Percentage 3.35e+01%, Percentage 4.27e+01%, Percentage 4.85e+01%, Percentage 7.09e+01%, Percentage 7.20e+00%, Percentage 7.78e+01% DOI:10.13227/j.hjkx.202012104 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651115 Title:Transformation Characteristics of Dissolved Organic Matter During UV/Chlorine Treatment of Municipal Secondary Effluent Title of translation:市政污水二级出水中溶解性有机质在紫外/氯处理过程中的转化特性 Authors:Wang, Xue-Ning (1); Zhang, Bing-Liang (1); Pan, Bing-Cai (1, 2) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing; 210023, China; (2) Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing; 210023, China Corresponding author:Pan, Bing-Cai(bcpan@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3847-3857 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As an emerging advanced oxidation technology, UV/chlorine treatment is capable of effectively oxidizing various organic pollutants. Till now, the transformation of dissolved effluent organic matter (dEfOM) in real wastewater during UV/chlorine treatment remains unclear. In this study, ultraviolet and fluorescence spectroscopy were combined with Fourier transform ion cyclotron resonance mass spectrometry to probe the transformation of dEfOM in two municipal secondary effluents during UV/chlorine treatment. Meanwhile, the newly formed chlorinated byproducts (Cl-BPs) are particularly concerned. Generally, aromatic compounds and fluorescent components could be readily removed after UV/chlorine treatment, and most of the dEfOM underwent transformation rather than mineralization. Protein-like components, which accounted for the largest proportion of fluorescent components, were subject to a preferential reaction. UV/chlorine treatment could result in the degradation of CHOS compounds and the formation of CHO compounds. During this process, unsaturated and reduced compounds of large molecules were preferentially removed, whereas saturated and oxidized compounds with low molecular weight were produced. Moreover, the concentrations of trihalomethanes and haloacetic acids increased substantially after UV/chlorine treatment. In total, 255 and 133 Cl-BPs were detected in the respective effluents after UV/chlorine treatment. In addition, 12 and 43 possible precursor-Cl-BPs pairs were identified, respectively, based on electrophilic substitution and addition reactions by means of mass difference analysis. This study is expected to provide fundamental information for practical application of the UV/chlorine treatment process.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Chemicals removal (water treatment) Controlled terms:Addition reactions - Biogeochemistry - Effluent treatment - Effluents - Fluorescence - Fluorescence spectroscopy - Mass spectrometry - Organic pollutants - Unsaturated compounds - Wastewater treatment Uncontrolled terms:Advanced oxidation technology - Chlorinated byproducts - Dissolved organic matters - Effluent organic matter - Electrophilic substitutions - Fourier transform ion cyclotron resonance mass spectrometry - Municipal secondary effluents - Preferential reaction Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202012187 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650970 Title:Characterization and Exposure Risk Assessment of Non-phthalate Plasticizers in House Dust from Guangzhou Title of translation:广州地区室内灰尘中典型非邻苯增塑剂的污染特征与暴露风险 Authors:Liu, Xiao-Tu (1); Peng, Chang-Feng (2); Chen, Da (1); Shi, Yu-Meng (1); Tang, Shu-Qin (1); Tan, Hong-Li (1); Huang, Wei (1) Author affiliation:(1) School of Environment, Jinan University, Guangzhou; 510632, China; (2) Key Laboratory of Molecular Epidemiology, Shenzhen Center for Disease Control and Prevention, Shenzhen; 518020, China Corresponding author:Chen, Da(dachen@jnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3676-3681 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Although non-phthalate plasticizers are widely used in various consumer products as substitutes for phthalates, currently little is known about their environmental occurrence and the risks of human exposure. To characterize the pollution and human exposure risk in indoor environments, house dust samples collected from 83 households in Guangzhou were analyzed for twelve typical non-phthalate plasticizers. Results showed that dioctyl terephthalate (DEHT), trioctyl trimellitate (TOTM), acetyl lemon tributyl ester (ATBC), heptylnonyl adipate, di(2-ethylhexyl) adipate, and trioctyl trimellitate were detected in all samples. The total concentrations of non-phthalate plasticizers ranged from 22.4 to 615 μg•g-1 with a median of 101 μg•g-1. DEHT had the highest concentrations (9- 487 μg•g-1), followed by TOTM (0.3- 87 μg•g-1) and ATBC (1.7- 50 μg•g-1). Daily intakes via dust ingestion for adults and children were estimated based on the dust concentrations. The total daily intake of children was 367 ng•(kg•d)-1, which was 8- 9 times higher than that of adults [43 ng•(kg•d)-1]. Further risk assessment through the hazard quotient approach showed that the exposure of adults and children to non-phthalic plasticizers via dust ingestion was within an acceptable risk range.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Risk assessment Controlled terms:Consumer products - Dust - Esters - Plasticizers - Reinforced plastics - Solvents Uncontrolled terms:Di(2-ethylhexyl)adipate - Dust concentrations - Environmental occurrence - Hazard quotients - Human exposure risks - Human exposures - Indoor environment - Phthalate plasticizers Classification code:451.1 Air Pollution Sources - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 817.1 Polymer Products - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202012117 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651007 Title:Sources and Optical Dynamics of Chromophoric Dissolved Organic Matter in Different Types of Urban Water Bodies Title of translation:城市不同类型水体有色可溶性有机物来源组成特征 Authors:Yu, Xiao-Qin (1, 2); Cui, Yang (3); Chen, Hui-Min (1, 2); Zhu, Jun-Yu (2); Li, Yu-Yang (2); Guo, Yan-Ni (2); Zhou, Yong-Qiang (2); Han, Long-Fei (1) Author affiliation:(1) College of Geographic Sciences, Hunan Normal University, Changsha; 410081, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Northeast Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group, Changchun; 130021, China Corresponding author:Han, Long-Fei(hanlf@hunnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3719-3729 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In the past few decades, China's rapid industrial activities and urbanization processes have greatly impacted the urban surface water ecosystem. The changes in the quality of urban surface water directly affect the supply and carbon cycling of urban waters. We collected 50 water samples from urban rivers, lakes, and reservoirs in the city of Changchun in June 2020. Three-dimensional fluorescence spectroscopy coupled with parallel factor analysis (EEMs-PARAFAC) was used to unravel the optical characteristics, composition, and sources of chromophoric dissolved organic matter (CDOM). Our results indicated that the mean concentration of DOC is significantly higher in urban rivers than in reservoirs (t-test, P<0.05), and the mean UV absorption coefficient of CDOM a254 of urban rivers is significantly larger than that of park lakes and reservoirs (t-test, P<0.05), indicating that urban rivers have the highest concentration of CDOM. The spectral slope of CDOM absorption S275- 295 and the spectral slope ratio SR were shown to be higher in park lakes than in reservoirs, and even higher than in urban rivers (t-test, P<0.001). Three fluorescent components were obtained using PARAFAC, namely terrestrial human-like (C1), microbial human-like (C2) and tryptophan-like (C3) components. The mean fluorescence intensity of C1-C3 was significantly higher in urban rivers than in both the park lakes and reservoirs (t-test, P<0.005), and the mean fluorescence intensity of C1 in the reservoir water body was significantly higher than that of C2 and C3 (t-test, P<0.005), indicating that the discharge of municipal wastewater likely contributes significantly to the CDOM pool of urban rivers in Changchun, and the contribution percentages of highly bio-labile protein-like components to the CDOM pool in these waters are high. Urban wastewater treatment should be strengthened to effectively protect water quality, as well as the economic, environmental, and ecological functions of urban waters in Changchun City.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Reservoirs (water) Controlled terms:Amino acids - Biogeochemistry - Ecology - Fluorescence - Fluorescence spectroscopy - Hydrogeology - Lakes - Organic compounds - Rivers - Testing - Uranium metallography - Vanadium metallography - Wastewater treatment - Water quality Uncontrolled terms:Chromophoric dissolved organic matter - Ecological functions - Industrial activities - Mean fluorescence intensities - Municipal wastewaters - Optical characteristics - Parallel factor analysis - Three-dimensional fluorescence spectroscopies Classification code:441.2 Reservoirs - 445.2 Water Analysis - 452.4 Industrial Wastes Treatment and Disposal - 454.3 Ecology and Ecosystems - 481.1 Geology - 481.2 Geochemistry - 531.2 Metallography - 547 Minor, Precious and Rare Earth Metals and Alloys - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202011193 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239902 Title:Pollutant Emission Inventory of Biomass Combustion Sources in Xining City Title of translation:西宁市生物质燃烧源大气污染物排放清单 Authors:Gao, Yu-Zong (1, 2); Ji, Ya-Qin (1, 2); Lin, Zi (1, 2); Lin, Yu (1, 2); Yang, Yi (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China; (2) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, Tianjin; 300350, China Corresponding authors:Ji, Ya-Qin(jiyaqin@nankai.edu.cn); Ji, Ya-Qin(jiyaqin@nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5585-5593 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the data of biomass combustion source activity level collected in Xining City and the emission factors, emission inventories of nine air pollutants from biomass combustion sources were established in Xining City in 2018, after which the temporal and spatial distribution characteristics and uncertainties of the inventory were analyzed. The results indicated that the total emissions of CO, NOx, SO2, NH3, VOCs, PM2.5, PM10, BC, and OC from biomass combustion sources in Xining City in 2018 were 11 718.34, 604.41, 167.80, 209.72, 1 617.97, 2 054.04, 2 135.04, 281.07, and 1 224.78 t, respectively. The emission contributions of CO, NOx, VOCs, PM2.5, PM10, BC, and OC from straw open burning were the highest for biomass combustion sources. Among them, the contributions of NOx, VOCs, and CO from straw open burning were 72.35%, 63.94%, and 53.18%, respectively, and the contributions of NH3 and SO2 from household biomass furnaces were the largest, 41.49% and 42.05%, respectively. The spatial distribution from biomass combustion sources was not balanced; the air pollutants were mainly concentrated in Datong County and Huangzhong District. The temporal distributions from biomass combustion sources in Xining City were relatively large in January, February, March, October, November, and December, accounting for 5%-33%. The Monte Carlo simulation results showed that, under the 95% confidence interval, the PM2.5 emissions from forest and grassland fires had the highest uncertainty, with the uncertainty ranging from -26.71%-29.78%.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Uncertainty analysis Controlled terms:Air pollution - Ammonia - Biomass - Combustion - Intelligent systems - Monte Carlo methods - Nitrogen oxides - Spatial distribution Uncontrolled terms:Air pollutants - Biomass combustion - Biomass combustion source - Combustion sources - Emission inventories - NO x - PM 10 - PM 2.5 - Uncertainty - Xining city Classification code:405.3 Surveying - 451 Air Pollution - 723.4 Artificial Intelligence - 804.2 Inorganic Compounds - 902.1 Engineering Graphics - 921 Mathematics - 922.1 Probability Theory - 922.2 Mathematical Statistics Numerical data indexing:Percentage -2.671E+01%, Percentage 2.978E+01%, Percentage 4.149E+01%, Percentage 4.205E+01%, Percentage 5.00E+00% to 3.30E+01%, Percentage 5.318E+01%, Percentage 6.394E+01%, Percentage 7.235E+01%, Percentage 9.50E+01% DOI:10.13227/j.hjkx.202104074 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239991 Title:Emission Characteristics of Industrial VOCs Based on Emission Inventory and Field Test: A Case Zhengzhou High-tech Zone Title of translation:基于排放清单和实地测试的工业VOCs排放特征:以郑州市高新区为例 Authors:Ren, He (1, 2); Lu, Xuan (1, 2); Liu, Yang (2); Yin, Sha-Sha (3); Hu, He-Xiao (4) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Research Institute of Environmental Sciences, Zhengzhou University, Zhengzhou; 450001, China; (3) College of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China; (4) Henan Solid Waste and Chemicals Management Center, Zhengzhou; 450003, China Corresponding authors:Yin, Sha-Sha(shashayin@zzu.edu.cn); Hu, He-Xiao(29576728@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5687-5697 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, based on the data of industrial sources obtained from a field survey and conducting field sampling tests on the key industrial industries in Zhengzhou High-tech Zone,an industrial emission inventory of volatile organic compounds (VOCs) and a VOC speciation emission inventory were established. We also evaluated the ozone formation potential (OFP) and secondary organic aerosol formation potential (SOAp) of each component of the VOCs. The results showed that the total industrial VOC emissions of Zhengzhou High-tech Zone in 2017 was 4 566.0 t, and the rubber and plastic products industry, non-ferrous metal industry, and equipment manufacturing industry were the top three industries, with emissions of 1 924.2, 1 396.3, and 813.4 t, respectively. Among the VOC components, alkanes accounted for the largest proportion (40.9%), followed by oxygenated VOCs (32.2%), and aromatic hydrocarbons (20.3%). The five substances with the largest emissions were isopropanol, n-dodecane, toluene, methylcyclohexane, and acetone. The total amount of OFP was 8 753.8 t, and the largest contributing source was the equipment manufacturing industry; the largest VOC species present was aromatic hydrocarbons. The total amount of SOAp was 643.0 t. Additionally, the largest emission sources were the equipment manufacturing industry and aluminum foil manufacturing industry; the alkanes and aromatic hydrocarbons were the two main contributing components.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Volatile organic compounds Controlled terms:Acetone - Aerosols - Aromatization - Industrial emissions - Manufacture - Mineral oils - Ozone - Paraffins - Petroleum industry - Rubber industry - Toluene Uncontrolled terms:Emission inventories - Equipment manufacturing industries - High-tech zones - Organic aerosol - Ozone formation potential - Ozone formation potentials - Secondary organic aerosol potential - Source profiles - Speciation emission inventory - Volatile organic compound Classification code:451.1 Air Pollution Sources - 513.3 Petroleum Products - 537.1 Heat Treatment Processes - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 818.4 Rubber Factories and Machinery - 913.4 Manufacturing Numerical data indexing:Percentage 2.03E+01%, Percentage 3.22E+01%, Percentage 4.09E+01% DOI:10.13227/j.hjkx.202103271 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239985 Title:Effects of Enteromorpha prolifera Biochar and Wood Vinegar Co-application on Takyric Solonetz Improvement and Yield of Oil Sunflower Title of translation:浒苔生物炭与木醋液复配改良碱化土壤效果及提高油葵产量 Authors:Wang, Zheng (1, 2); Sun, Zhao-Jun (1, 3); El-Sawy, Sameh (4); Wang, Zhen (3); He, Jun (3); Han, Lei (3); Zou, Ben-Tao (5) Author affiliation:(1) School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan; 750021, China; (2) Xinhua College, Ningxia University, Yinchuan; 750021, China; (3) Institute of Environmental Engineering, Ningxia University, Yinchuan; 750021, China; (4) National Research Centre of Egypt, Cairo; 11435, Egypt; (5) School of Electromechanical and Automotive Engineering, Yantai University, Yantai; 264005, China Corresponding authors:Sun, Zhao-Jun(sunzhaojunyx@126.com); Sun, Zhao-Jun(sunzhaojunyx@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6078-6090 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The purpose of this study was to reveal the effects of Enteromorpha prolifera biochar combined with wood vinegar on takyric solonetz improvement and crop yield. Different biochar amounts [0%, 1%, 2%, and 4% (ω)] were studied on the basis of 0% and 2% (φ) wood vinegar, wherein no biochar or wood vinegar was applied in the control (CK).Soil pH, alkalinity, exchange sodium percentage (ESP), salinity, bulk density, Olsen-P, organic matter, soil salt concentration, and yield of oil sunflower were analyzed. The results showed that first, the comprehensive effects of 2% wood vinegar and 2% biochar co-application (V2BC2) were greatest; in comparison to that in the CK, the soil pH, ESP, salinity, and bulk density significantly decreased by 12.14%, 40.63%, 42.75%, and 20.78%, respectively. Second, the content of Na+, Cl-, and SO42- significantly decreased by 47.17%, 45.32%, and 33.33%, respectively, compared with those in the CK. In the soil layer of 0-40 cm under the treatment of biochar combined with wood vinegar, however, K+ and Ca2+ content increased. In addition, there was little variation in the remaining ions compared with those in the CK. Third, Enteromorpha prolifera biochar and wood vinegar co-application significantly increased the soil nutrient content and availability and enhanced microbial activity. Compared to that under the CK, Olsen-P and organic matter increased by 2.88 times and 58.76%, respectively, and the activity of urease, alkaline phosphatase, and invertase increased by 0.92 times, 1.02 times, and 2.29 times, respectively. Finally, the highest crop yield was 3 546.7 kg•hm-2 under the V2BC2 treatment, which was 2 325.3 kg•hm-2 more than that under the CK. Therefore, Enteromorpha prolifera biochar and wood vinegar co-application can further strengthen the improvement of takyric solonetz and crop yield.
© 2021, Science Press. All right reserved. Number of references:62 Main heading:Crops Controlled terms:Alkalinity - Biogeochemistry - Phosphatases - Soils - Sunflower oil - Wood Uncontrolled terms:Biochar - Bulk density - Crop yield - Enteromorpha prolifera - Enteromorpha prolifera biochar - Soil enzymes - Soil pH - Soil salinity - Takyric solonetz improvement - Wood vinegars Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 801.2 Biochemistry - 804 Chemical Products Generally - 804.1 Organic Compounds - 811.2 Wood and Wood Products - 821.4 Agricultural Products - 822.3 Food Products Numerical data indexing:Mass 3.253E+02kg, Mass 5.467E+02kg, Percentage 0.00E00%, Percentage 1.00E00%, Percentage 1.214E+01%, Percentage 2.00E+00%, Percentage 2.078E+01%, Percentage 3.333E+01%, Percentage 4.00E+00%, Percentage 4.063E+01%, Percentage 4.275E+01%, Percentage 4.532E+01%, Percentage 4.717E+01%, Percentage 5.876E+01%, Size 0.00E00m to 4.00E-01m DOI:10.13227/j.hjkx.202103068 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404516 Title:Distribution Characteristics of Antibiotics and Antibiotic Resistance Genes in Manure and Surrounding Soil of Cattle Farms in Ningxia Title of translation:宁夏养牛场粪污和周边土壤中抗生素及抗生素抗性基因分布特征 Authors:Zhang, Jun-Hua (1); Chen, Rui-Hua (2); Liu, Ji-Li (1); Shang, Tian-Hao (2); Shen, Cong (3) Author affiliation:(1) School of Ecology and Environment, Ningxia University, Yinchuan; 750021, China; (2) School of Geography and Planning, Ningxia University, Yinchuan; 750021, China; (3) School of Life Sciences, Ningxia University, Yinchuan; 750021, China Corresponding author:Liu, Ji-Li(18295172155@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2981-2991 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Livestock breeding intensively uses veterinary antibiotics in concentrated feeding operations to improve growth and control disease. Consequently, livestock and poultry manure is an important repository of antibiotics and antibiotic resistance genes (ARGs). To understanding the distribution of antibiotics and ARGs in manure and surrounding soils of cattle farms in Ningxia, cattle manure from five breeding periods (lactation, calving, growing, pre-fattening, and post-fattening periods) and comparative soil samples were collected from the largest beef-breeding area in Ningxia. The compositions of ARGs in the samples were analyzed by UPLC-MS/MS and HT-qPCR. The results showed that: ① Tetracycline, quinolone, and sulfonamide were the dominant antibiotics in cattle manure. The content of antibiotics in the manure varied greatly between different breeding periods. High amounts of antibiotics were detected during the pre-fattening and lactation periods, and the lowest amounts were detected during the calving period. ② Quinolone and tetracycline were the dominant antibiotics in the soils, and the detection rate and content of quinolone were highest. The cattle farms did not affect the distribution of antibiotics in the surrounding soils. The content of quinolone and tetracycline in the soils with cattle manure application were significantly higher than control and surrounding soils. ③ We detected 79-142 ARGs in cattle manure, with aminoglycosides the most common form. The number and relative abundance of ARGs were highest during the growing period and lowest during the calving period. The dominant ARGs were tetQ, ermF, and tetO-01 across all the breeding periods. ④ There were 35-79 ARGs in the tested soils, and multidrug and aminoglycoside ARGs were dominant. The cattle farms did not affect the number and relative abundance of ARGs in the surrounding soils; however, manure application significantly affected the number and relative abundance of ARGs. ⑤ Sulfonamide and chloramphenicol ARGs are at risk of mobilization and horizontal transport. A correlation analysis showed that the relative abundances of aminoglycoside and tetracycline in cattle manure were significantly positively correlated with their contents. ⑥ Aminoglycoside, sulfonamide, chloramphenicol, and mobile genetic elements (MGEs) in manure were significantly or extremely significantly positively correlated with aminoglycosides and sulfonamides in the soils, whereas macrolides were negatively correlated with vancomycin. These results provide baseline data to inform controls on the variety and dosages of feed and veterinary drugs in cattle farms and the application of organic fertilizers in agriculture.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Manures Controlled terms:Agricultural robots - Agriculture - Amides - Antibiotics - Controlled drug delivery - Disease control - Drug dosage - Fertilizers - Genes - Polymerase chain reaction - Soils - Sulfur compounds Uncontrolled terms:Antibiotic resistance genes - Correlation analysis - Distribution characteristics - Horizontal transport - Livestock breeding - Manure applications - Organic fertilizers - Veterinary antibiotic Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 804 Chemical Products Generally - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes DOI:10.13227/j.hjkx.202011075 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779665 Title:Shortening SRT of Intermittent Gradient Aeration to Realize Nitrogen and Phosphorus Removal in Short-range SNEDPR System Title of translation:间歇梯度曝气下缩短SRT强化短程SNEDPR系统脱氮除磷 Authors:Zhang, Yu-Jun (1); Li, Dong (1); Wang, Xin-Xin (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin; 150090, China Corresponding author:Li, Dong(lidong2006@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4383-4389 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study explored the effect of sludge retention time (SRT) on ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) under intermittent gradient aeration, as well as the effect of the short-range nitrification endogenous denitrification phosphorus removal system on the treatment of low C/N ratio domestic sewage. In this study, an SBR reactor was used to cultivate aerobic granular sludge, using actual domestic sewage as the influent substrate. As the SRT decreased from 50 d to 30 d, the specific ammonia oxidation rate increased from 3.16 mg•(g•h)-1to 4.38 mg•(g•h)-1, and the specific nitrite oxidation rate decreased from 3.4 mg•(g•h)-1to 1.8 mg•(g•h)-1. The activity of NOB decreased by about 44%, resulting in short-range nitrification within the system. With an SRT of 30 d, the maximum nitrite accumulation was 6.93 mg•L-1. Because the reduced SRT led to a slight decrease in sludge concentration within the system, an aeration reduction strategy was adopted after 40 d, according to the DO curve. When the final SRT was 30 d, the effluent COD concentration was 40.76 mg•L-1, the TN concentration was 12.4 mg•L-1, the TP concentration was 0.31 mg•L-1, and the simultaneous removal of C, N and P was realized. Thus, a stable short-range nitrification endogenous denitrification phosphorus removal system was finally obtained. At the same time, the EPS content of aerobic granular sludge was negatively correlated with SRT, the protein content increased from 66.7 mg•g-1 to 95.1 mg•g-1, and the polysaccharide content remained in the range of 12.1-17.2 mg•g-1, indicating that the decreased SRT had a great effect on the protein content. With an SRT of 30 d, the PN/PS value was maintained at approximately 6.2, and the structural stability of aerobic granular sludge can be maintained under such conditions.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Nitrogen removal Controlled terms:Ammonia - Bacteria - Chemical oxygen demand - Denitrification - Granular materials - Nitration - Nitrification - Nitrogen - Phosphorus - Proteins - Sewage - Sewage aeration - Stability Uncontrolled terms:Aerobic granular sludges - Ammonia oxidizing bacteria - Endogenous denitrification - Nitrite-oxidizing bacteria - Nitrogen and phosphorus removal - Polysaccharide contents - Sludge retention time - Structural stabilities Classification code:452.1 Sewage - 452.2 Sewage Treatment - 802.2 Chemical Reactions - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Mass_Density 1.24e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 3.10e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 4.08e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 6.93e-03kg/m3 to 2.20e-02kg/m3, Percentage 4.40e+01% DOI:10.13227/j.hjkx.202101190 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945241 Title:Occurrence, Distribution, and Ecological Risk Assessment of Pharmaceutical and Personal Care Products in the Aquatic Environment of Sanya City, China Title of translation:三亚市水体中PPCPs的污染水平, 分布特征及生态风险评价 Authors:Ren, Bing-Nan (1, 2); Geng, Jing (1) Author affiliation:(1) ZHAI Ming-guo Academician Workstation, University of Sanya, Sanya; 572000, China; (2) School of Health Industry Management, University of Sanya, Sanya; 572000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4717-4726 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The occurrence, distribution, and risk of 11 typical pharmaceutical and personal care products(PPCPs)were investigated in the major rivers and bay areas of Sanya City. The results showed that the significant seasonal variations in eleven PPCPs in major rivers of the city were affected by intense tourism alongside reduced annual runoff. In winter, all 11 PPCPs had 100% detection frequencies, of which CFI had the highest concentration at 1 449.10 ng•L-1. The highest concentration of MTP was 427.06 ng•L-1 and highest concentration of RTM was 311.59 ng•L-1. In summer, all 11 PPCPs were again detected, with a lowest detection rate of 87.5%, of which CFI, MTP, RTM, ETM, and OFL were predominant. All 11 PPCPs were also detected in the surface seawater of the main bay areas, with detection frequencies of 85.7%, 57.1%, and 71.4% for SMX, MTP, and CFI respectively; the other eight PPCPs had 100% detection frequencies. CFI had the highest concentration at 220.78 ng•L-1. An ecological risk assessment of the 11 PPCPs showed that the risk quotients(RQ)of STZ at Yuechuan Bridge and RTM at Fenghuang Road were higher than 1 in winter, posing a high risk to the aquatic ecology. This was mainly attributed to the discharge of water from nearby hospitals and sewage treatment plants. In summer, the RQ of STZ at Sanya Bridge and RTM at Hongsha Wharf was between 0.1 and 1, which indicates a medium level of risk to the aquatic environment in Sanya City.
© 2021, Science Press. All right reserved. Number of references:53 Main heading:Risk assessment Controlled terms:Ecology - Sewage treatment - Sewage treatment plants Uncontrolled terms:Aquatic environments - Bay areas - Detection frequency - Distribution characteristics - Ecological risk assessment - Ecological risks - Pharmaceutical and personal care products - Risk quotients - Sanya city - Seasonal variation Classification code:452.2 Sewage Treatment - 454.3 Ecology and Ecosystems - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass 2.2078E-10kg, Mass 3.1159E-10kg, Mass 4.2706E-10kg, Mass 4.491E-10kg, Percentage 1.00E+02%, Percentage 5.71E+01%, Percentage 7.14E+01%, Percentage 8.57E+01%, Percentage 8.75E+01%, Size 2.54E-02m DOI:10.13227/j.hjkx.202102031 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239925 Title:VOCs Emission Characteristics of Water-based Architectural Coatings and the Influence on the Atmospheric Environment in China Title of translation:我国水性建筑涂料VOCs排放特征及其环境影响 Authors:Gao, Mei-Ping (1); Wang, Hai-Lin (1); Liu, Wen-Wen (1); Nie, Lei (1); Li, Guo-Hao (1); An, Xiao-Shuan (1) Author affiliation:(1) Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China Corresponding author:Liu, Wen-Wen(liuwenwen@cee.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5698-5712 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Architectural coatings are an important anthropogenic emission source of volatile organic compounds(VOCs)in China; however, there are few studies on the VOC component characteristics and environmental impact from architectural coatings. In this study, seven types of water-based architectural coatings were investigated. The coating samples were obtained from production enterprises, architectural engineering sites, and markets and were analyzed using the GC/MS system. The mass concentration and composition spectrum of VOCs in various water-based architectural coatings were established, and the contributions of water-based architectural coatings to ozone and secondary organic aerosol (SOA) formation were investigated. The results showed that: ① ρ(VOCs) in different types of water-based architectural coating samples ranged between 0-116.07 g•L-1, showing considerable variety; however, they all met the requirements of relevant standards. The average ρ(VOCs) for the water-based interior wall coatings, water-based exterior wall real stone coatings and textured coatings, water-based exterior wall flat coatings and elastic coatings, water-based waterproof coatings, water-based floor coatings, water-based anticorrosive coatings, and water-based fire-resistant coatings were 6.66, 1.12, 24.51, 0.89, 61.62, 41.86, and 0.09 g•L-1, respectively. ② The main components in various types of water-based architectural coatings were alcohols, alcohol ethers and ether esters, and amines. Water-based floor coatings and water-based anticorrosive coatings had relatively high percentages of aromatics and alkanes. The main VOC species in various types of water-based architectural coatings were ethylene glycol, 1,2-propanediol, methanol, n-butyl alcohol, 2-butoxyethanol, triethylamine, 2-amino-2-methyl-1-propanol, and N,N-dimethylethanolamine. The main VOC species in water-based floor coatings and water-based anticorrosive coatings still contained xylenes, trimethyl benzenes, m-ethyl toluene, and n-hendecane. ③ The O3 productions (O3/coatings) for various types of water-based architectural coatings ranged from 0.17-224.89 g•L-1; among them, water-based floor coatings had the highest production. Alcohols, aromatics, and alcohol ethers and ether esters were the main components that contributed significantly to the OFP in various types of water-based architectural coatings. N,N-dimethylethanolamine, xylenes, and trimethyl benzenes with high reactivity had a large influence on ozone production and should be controlled preferentially. ④ The SOA productions (SOA/coatings) for water-based floor coatings and water-based anticorrosive coatings were 0.72 g•L-1 and 0.11 g•L-1, respectively, and the SOA productions for other types of water-based architectural coatings were nearly zero. This suggests that it may be advisable to reduce the concentrations of aromatics and alkanes in water-based floor coatings and water-based anticorrosive coatings, as their control is an efficient strategy for SOA reduction. ⑤ Comparing the environmental impact between water-based architectural coatings and solvent-based architectural coatings, the VOC concentrations and O3 and SOA productions per gram of water-based architectural coatings were much lower than that for solvent-based architectural coatings. Therefore, the implementation of a water-based architectural coating substitution strategy from the source could effectively reduce VOC emissions and abate O3 and SOA productions.
© 2021, Science Press. All right reserved. Number of references:64 Main heading:Volatile organic compounds Controlled terms:Amines - Corrosion resistant coatings - Ethers - Ethylene - Ethylene glycol - Floors - Gas chromatography - Polyols - Textures Uncontrolled terms:Aerosol production - Anti-corrosive coatings - Architectural coatings - Component characteristics - Exterior walls - Organic aerosol - Source profiles - Volatile organic compound emission - Water based - Water-based architectural coating Classification code:402 Buildings and Towers - 539.2 Corrosion Protection - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Mass 1.70E-04kg to 2.2489E-01kg, Mass 7.20E-04kg, Mass 9.00E-05kg, Mass 0.00E00kg to 1.1607E-01kg, Mass 1.00E-03kg, Mass 1.10E-04kg DOI:10.13227/j.hjkx.202104115 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779725 Title:Impacts of Anthropogenic Emission Reduction and Meteorological Conditions on PM2.5 Pollution in Typical Cities of Beijing-Tianjin-Hebei in Winter Title of translation:京津冀典型城市冬季人为源减排与气象条件对PM2.5污染影响 Authors:Shao, Xuan-Yi (1); Wang, Xiao-Qi (1); Zhong, Yi-Sheng (1); Wang, Rui-Peng (1) Author affiliation:(1) Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China Corresponding author:Wang, Xiao-Qi(wangxq@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4095-4103 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study used sampling analysis and a CAMx-PSAT coupling model to analyze the components, transmission, and source apportionment of PM2.5 in Beijing and Tangshan in January 2018. The results showed that in January 2018, water-soluble inorganic ions (WSIIs) accounted for 49.59% and 39.13% of PM2.5 mass concentrations in Beijing and Tangshan, respectively. The ratios of NO3- to SO42- were 2.02 and 1.51, respectively, indicating that pollution in both cities was dominated by mobile sources. In Beijing and Tangshan, PM2.5 accounted for 48.74% and 30.67% of transmission, respectively. Regional transmissions were mainly contributed by neighboring areas, northwest masses, and southwest masses. However, the contribution of the southwest passage to pollution in the respective cities increased by 9.65% and 15.02% during pollution periods. The principal sources contributing to PM2.5 pollution in Beijing were mobile and dust sources. Secondary ions were more obviously affected by regional contributions, mobile and industrial sources had the most significant effect in Tangshan, and most particulate matter and sulfate were contributed by local emissions. From 2013 to 2018, the dominant component of WSIIs changed from sulfate to nitrate while the main pollution sources changed from coal-fired and industrial sources to mobile and dust sources. Meanwhile, in January 2018, the meteorological factors were more favorable for pollution mitigation than in 2013. The meteorological impact of secondary ions is closely related to the lower relative humidity in 2018, compared to 2013.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Air pollution Controlled terms:Coal dust - Emission control - Ions - Secondary emission - Sulfur compounds - Transmissions Uncontrolled terms:Anthropogenic emissions - Industrial sources - Meteorological condition - Meteorological factors - Particulate Matter - Pollution mitigation - Source apportionment - Water soluble inorganic ions Classification code:451 Air Pollution - 451.2 Air Pollution Control - 503 Mines and Mining, Coal - 524 Solid Fuels - 602.2 Mechanical Transmissions Numerical data indexing:Percentage 1.50e+01%, Percentage 3.07e+01%, Percentage 3.91e+01%, Percentage 4.87e+01%, Percentage 4.96e+01%, Percentage 9.65e+00% DOI:10.13227/j.hjkx.202011216 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582271 Title:Influence of Impervious Surface Roughness on Accumulation and Erosion of Urban Non-Point Source Particles Title of translation:不透水地表粗糙度对城市面源颗粒物的累积和冲刷影响 Authors:Shan, Xi-Huan (1, 2); Xie, Wen-Xia (1); Liao, Yun-Jie (2); Fang, Zhi-Da (2); Yang, Xiao-Jing (2, 3); Su, Jing-Jun (2); Zhao, Hong-Tao (2); Li, Xu-Yong (2) Author affiliation:(1) College of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) College of Environment and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China Corresponding author:Xie, Wen-Xia(xwx080312@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3328-3337 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
At present, there are few reports about how impervious surface microstructure characteristics affect the runoff output process of street dust. Based on field observations of 12 rainfall events, this study quantified the microstructure characteristics of impervious surfaces by structural depth (roughness) and analyzed the correlation between roughness and accumulation characteristics of street dust on sunny days as well as scouring characteristics in rainy days. The results show that the roughness of the underlying surface notably affects dust accumulation on sunny days and scouring in rainy days. The correlation between roughness and street dust accumulation (r=0.664, P<0.01) was enhanced on sunny days, and the correlation between roughness and street dust erosion (r=0.527, P<0.01) was enhanced by rainfall. The correlation of street dust accumulation and roughness of each particle size segment increased as particle size increased (0.529≤r<0.757), and the correlation between street dust scouring amount and roughness decreased as particle size increased (0.603>R>0.209). By establishing the linear regression model of roughness and rainfall, the cumulative pollution load of TSS in rainfall runoff can be well predicted. The effects of roughness and rainfall on the cumulative load of grain sizes<20 μm and >250 μm are significant. These results elucidate the role of roughness and rainfall analysis in predicting surface runoff pollution load characteristics, which can provide new information for predicting and evaluating urban non-point source pollution.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Surface roughness Controlled terms:Air pollution - Dust - Erosion - Grain size and shape - Microstructure - Particle size - Particle size analysis - Rain - Regression analysis - Runoff Uncontrolled terms:Accumulation characteristics - Field observations - Impervious surface - Linear regression models - Microstructure characteristics - Non-point source pollution - Rainfall analysis - Underlying surface Classification code:442.1 Flood Control - 443.3 Precipitation - 451 Air Pollution - 451.1 Air Pollution Sources - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science DOI:10.13227/j.hjkx.202012063 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779881 Title:Enhanced Removal of Pollutants in Constructed Wetlands with Manganese Sands Title of translation:锰砂人工湿地对污染物的强化去除 Authors:Ma, Quan (1); Wang, Dong-Lin (2, 3); Lin, Hui (2, 3); Bai, Yao-Hui (3) Author affiliation:(1) School of Environment, Northeast Normal University, Changchun; 130024, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Bai, Yao-Hui(yhbai@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4304-4310 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Manganese (Mn) sands have been widely used in water purification due to their strong oxidation and adsorption abilities. However, there are few reports on the use of manganese sands as filler material in constructed wetlands. Based on previous studies, we speculated that the addition of manganese sands in constructed wetlands would enhance the removal of pollutants from the source water, and the resulting Mn(Ⅱ) could then be oxidized by the rhizosphere and soil microorganisms in the wetlands. To test this hypothesis, this study explored the enhanced removal of pollutants in wetlands constructed with manganese sands as substrates and Phragmites as plants, and also examined the role of Phragmites rhizosphere microorganisms in water purification. By comparing the treatment effects between the wetlands constructed with and without manganese sands (control), we found that the wetland containing manganese sands exhibited significantly improved removal of dissolved organic carbon and total nitrogen, as well as removal of ammonia nitrogen during periods of lower temperature. The 16S rRNA sequencing showed that the addition of manganese sands could increase the richness and diversity of Phragmites rhizosphere microorganisms, but had limited impacts on the microbial community structure, which might be an important factor for enhancing the water treatment performance of constructed wetlands. This study provides a new method for the technological optimization of constructed wetlands.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Manganese removal (water treatment) Controlled terms:Ammonia - Microorganisms - Nitrogen - Nitrogen removal - Organic carbon - Purification - RNA - Sand - Soils - Water pollution - Water treatment - Water treatment plants - Wetlands Uncontrolled terms:16s rrna sequencing - Constructed wetlands - Dissolved organic carbon - Microbial community structures - Rhizosphere microorganisms - Soil micro-organisms - Technological optimization - Treatment performance Classification code:445.1 Water Treatment Techniques - 453 Water Pollution - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202101289 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779619 Title:Spatial and Temporal Distribution and Pollution Evaluation of Soluble Heavy Metals in Liujiang River Basin Title of translation:柳江流域河流溶解态重金属时空分布及污染评价 Authors:Zhang, Wan-Jun (1, 2); Xin, Cun-Lin (1); Yu, Shi (2); Liu, Qi (3); Zeng, Peng (1, 2) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China; (2) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (3) Environmental Monitoring Station of Liuzhou City, Liuzhou; 545001, China Corresponding authors:Xin, Cun-Lin(xincunlin@163.com); Yu, Shi(yushihydrogeo@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4234-4245 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In the Liujiang River, soluble heavy metals Zn, Al, Co, As, Ni, Cr, Cu, Mn, Pb, Hg, and Cd were monitored day and night to determine their temporal and spatial distribution as well as the sources of this pollution. The Nemerow comprehensive pollution index method was then used to evaluate the environmental quality of the Liujiang River water body. The results showed that: ① For each river section (Lutang and Luowei), the amounts of soluble Al, Co, As, Ni, Cr, Mn, Pb, and Cd all met the Class Ⅲ water quality standard limit, as defined in the National Surface Water Quality Class III Standard. The concentration of Zn and Cu was far below the standard limit, while the Hg content slightly exceeded the standard; the concentration of heavy metals in Liujiang River basin was highest in the normal season and lowest in the wet season. In terms of spatial distribution, the Luowei section had a higher heavy metal concentration. ② The single factor pollution indexes for elemental Hg, Cd, and As were higher in the Liujiang River basin. The Nemerow comprehensive pollution index evaluation shows that the risk of heavy metal pollution in the water body exhibits certain seasonal variations (March> November> June), indicating that rainfall in different seasons may result in reduced drinking water safety in the study area. The water of the Lutang and Luowei sections generally exhibited a moderate level of heavy metal pollution. The comprehensive pollution index of the Luowei section was higher than that of the Lutang section, and the pollution level was relatively severe. Therefore, the Luowei section should be listed as a priority control section of the Liujiang River basin by the water environment management department; ③ After assessing the difference in heavy metal pollution between annual and monthly rainfall periods, it was found that the selection of rainy season or conventional season has no significant impact on the assessment of heavy metal pollution in rivers, when the mass concentration of Cu in the river is used. However, the presence of As, Mn, Pb, Al, Cr, and Ni elements in the river will cause significant differences in the evaluation of heavy metal pollution on an interannual scale; ④ Multivariate statistical analysis results show that Cd, Cr, Ni, Co, and Pb in the Liujiang River are mainly derived from industrial production activities; As and Zn are mainly derived from rainwater leaching of domestic pollution waste; Mn, Al, and Cu are mainly derived from the application of pesticides and fertilizers.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:River pollution Controlled terms:Cadmium - Copper - Manganese removal (water treatment) - Multivariant analysis - Potable water - Quality control - Rain - Rivers - Spatial distribution - Water pollution control - Water quality - Watersheds - Zinc Uncontrolled terms:Environmental quality - Heavy metal concentration - Heavy metal pollution - Industrial production - Multivariate statistical analysis - Spatial and temporal distribution - Temporal and spatial distribution - Water quality standard Classification code:443.3 Precipitation - 444 Water Resources - 444.1 Surface Water - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 544.1 Copper - 546.3 Zinc and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 913.3 Quality Assurance and Control - 921 Mathematics - 922 Statistical Methods DOI:10.13227/j.hjkx.202012056 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404277 Title:Adsorption Mechanism of Cadmium by Superparamagnetic Nano-Fe3O4@SiO2 Functionalized Materials Title of translation:超顺磁性纳米Fe3O4@SiO2功能化材料对镉的吸附机制 Authors:Zhang, Li-Zhi (1, 2); Yi, Ping (1, 2); Fang, Dan-Dan (1, 2); Wang, Qiang (1, 2) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400716, China; (2) Key Laboratory of Agricultural Resources and Environment of Chongqing, Chongqing; 400716, China Corresponding author:Wang, Qiang(781216966@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2917-2927 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The treatment of cadmium-containing wastewater is of great significance for the emission control of the heavy metal cadmium. Here, a superparamagnetic nano-Fe3O4@SiO2 functionalized material (MFS) was prepared via a co-precipitation method, and the adsorption thermodynamic and kinetic characteristics of Cd2+ were studied by isothermal adsorption tests and kinetic experiments. The adsorption process and mechanism of MFS with respect to Cd2+ were also studied using BET, XRD, and SEM. The Langmuir equation well described the isothermal adsorption characteristics of MFS, and the maximum adsorption capacity was 69.49 mg•g-1. The standard free energy (ΔG), enthalpy (ΔH), and entropy changes (ΔS) showed that the adsorption reaction was a spontaneous, endothermic, and entropic process. The optimal initial pH of the adsorption reaction was 7. The four interfering ions (Mg2+, SO42-, Ca2+, and NO3-) in the solution had a certain inhibitory effect on the adsorption reaction. The pseudo-second-order kinetic model showed that the adsorption process of Cd2+ was divided into two stages, namely a rapid external diffusion stage and a slow internal diffusion stage. The removal rate of Cd2+ was still>73% after using the MFS three times. The BET, XRD, FTIR, and VSM analyses showed that SiO2 was successfully modified on the Fe3O4 surface. MFS is mainly spherical in structure with an average particle size of 38.7 nm and has a saturated magnetic intensity of 85.38 emu•g-1. The XRD, EDS, and XPS analyses revealed that Cd2+ was successfully adsorbed by the material, and the main mechanism was the coordination reaction between Cd2+ and -OH on the surface of the material.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Cadmium metallography Controlled terms:Adsorption - Cadmium - Chemicals removal (water treatment) - Coordination reactions - Emission control - Free energy - Iron oxides - Isotherms - Kinetics - Magnetite - Particle size - Particle size analysis - Precipitation (chemical) - Silica - Silicon - Superparamagnetism - Wastewater treatment - X ray diffraction Uncontrolled terms:Adsorption capacities - Adsorption thermodynamics - Average particle size - Coprecipitation method - Functionalized materials - Isothermal adsorption - Kinetic characteristics - Pseudo-second-order kinetic models Classification code:451.2 Air Pollution Control - 452.4 Industrial Wastes Treatment and Disposal - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 641.1 Thermodynamics - 701.2 Magnetism: Basic Concepts and Phenomena - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 931 Classical Physics; Quantum Theory; Relativity - 951 Materials Science Numerical data indexing:Size 3.87e-08m DOI:10.13227/j.hjkx.202010005 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804534 Title:Contributions of Emissions Reduction and Regional Meteorological Conditions to Air Quality Improvement Title of translation:区域气象条件和减排对空气质量改善的贡献评估 Authors:Wu, Wen-Qi (1); Zhang, Kai-Shan (1) Author affiliation:(1) College of Architecture and Environment, Sichuan University, Chengdu; 610065, China Corresponding author:Zhang, Kai-Shan(zhangkaishan@scu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:523-533 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Regional meteorological conditions and emissions reduction are closely related to air quality. China has a monsoonal climate and regional meteorological conditions are significantly impacted by interannual climate variability. The objective of this study was to evaluate the contributions of meteorological conditions and emissions reduction to regional improvements in air quality. Trend analyses of key meteorological factors and air pollution for the Beijing-Tianjin-Hebei region, Chengdu-Chongqing region, Yangtze River Delta, and Pearl River Delta urban agglomeration areas were performed for the period from 2001 to 2018, and K-Nearest Neighbor (KNN) models were constructed for each calendar year. The analysis showed that approximately half of the years between 2001 and 2018 experienced abnormal global-scale climate conditions, i.e., El Niño and La Niña. Both emissions reduction and climate changes contributed to the improvement of air quality during the study period. The contribution of meteorological conditions to air quality improvement under abnormal climate conditions was 51% compared to 30% under normal climate conditions in the Beijing-Tianjin-Hebei region; for the Yangtze River Delta and Pearl River Delta regions, meteorological conditions contributed approximately 50% to the improvement of air quality under both abnormal and normal climate conditions. In addition, the contribution of emissions reduction to air quality improvement was higher in the study areas during 2015-2018 compared to 2001-2012. This indicates that emissions reduction has played an increasingly important role in air quality improvements largely due to the implementation of a variety of emission control measures. However, the contribution of meteorological conditions to air quality improvement cannot be ignored.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Quality control Controlled terms:Air quality - Climate change - Emission control - Nearest neighbor search - River pollution - Rivers Uncontrolled terms:Air quality improvement - Beijing-tianjin-hebei regions - Emission control measures - Interannual climate variability - K nearest neighbor (KNN) - Meteorological condition - Meteorological factors - Pearl River Delta region Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 453 Water Pollution - 913.3 Quality Assurance and Control - 921.5 Optimization Techniques Numerical data indexing:Percentage 3.00e+01%, Percentage 5.10e+01% DOI:10.13227/j.hjkx.202005291 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110402831 Title:Emission Performance Quantitative Evaluation and Application of Industrial Air Pollution Sources Title of translation:工业大气污染源排放绩效定量评价及应用 Authors:Li, Ting-Kun (1); Feng, Yin-Chang (1); Wu, Jian-Hui (1); Bi, Xiao-Hui (1); Zhang, Yu-Fen (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China Corresponding author:Wu, Jian-Hui(envwujh@nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2740-2747 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Treatment of industrial atmospheric emission sources is an important way to improve air quality, but accurate pollution control remains still an urgent challenge. Taking Xiqing District of Tianjin as an example, based on the second national pollution source census, this study carried out a quantitative evaluation of the pollutant emission performance of industrial enterprises and explored the significance, feasibility, and challenges facing emission performance evaluation. The results show that the emission performance of various industries in Xiqing District vary greatly. The pollutant emission performance level is closely related to an industry's own attributes, development scale, and management level. On the whole, the emission performance level of industries with high production process emission coefficients and a high proportion of small and medium-sized enterprises (such as furniture manufacturing, the metal products industry, ferrous metal smelting, and the rolling processing industry) is worse, while the emission performance of high-end industries represented by computer communication and other electronic equipment manufacturing and automobile manufacturing is generally better. The emission performance of different enterprises in the same industry also varies greatly. For example, the 11 enterprises with the worst performance in the metal machinery manufacturing industry only contributed 0.06% of industrial output yet their PM emission contribution reached 8.50%. The 19 worst-performing enterprises in the rubber and plastic industry contributed 4.76% of industrial output yet their VOCs emissions accounted for 43.59% of the total. At the same time, this study presents an emissions reduction plan according to the relevant technical guidelines of the Ministry of Ecology and Environment. Based on this, the cost of emissions reduction could be cut by as much as 90% when the pollutant emissions reductions of the same scale are reduced. The gap in the pollutant emissions performance of various industries and enterprises, the incongruity between economic benefits and environmental costs, and the important guiding role of emission performance evaluation for emissions reductions demonstrate the necessity of performance evaluation. Overall, this research shows that pollutant emission performance evaluation can effectively support macro-industrial structure adjustment and the environmental governance of meso-micro industrial enterprises, providing an important reference for pollution control interventions.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Quality control Controlled terms:Air quality - Automobile electronic equipment - Cost reduction - Electronics industry - Emission control - Enterprise resource planning - Furniture manufacture - Industrial research - Machinery - Plastics industry - Rolling - Rubber industry - Smelting Uncontrolled terms:Automobile manufacturing - Environmental governances - Equipment manufacturing - Furniture manufacturing - Industrial structure adjustments - Machinery manufacturing industry - Pollutant emissions reduction - Small and medium sized enterprise Classification code:451.2 Air Pollution Control - 533.2 Metal Refining - 662.4 Automobile and Smaller Vehicle Components - 723.2 Data Processing and Image Processing - 818.4 Rubber Factories and Machinery - 901.3 Engineering Research - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 4.36e+01%, Percentage 4.76e+00%, Percentage 6.00e-02%, Percentage 8.50e+00%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202010059 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688808 Title:Quantitative Comparison of Methods to Assess the Airborne Particulate Matter Retention Capacity of Leaves Title of translation:叶片大气颗粒物滞纳能力评估方法的定量对比 Authors:Yue, Chen (1); Li, Guang-De (2); Xi, Ben-Ye (1); Cao, Zhi-Guo (3) Author affiliation:(1) Ministry of Education Key Laboratory of Silviculture and Conservation, Beijing Forestry University, Beijing; 100083, China; (2) Faculty of Agriculture Forestry & Medicine, The Open University of China, Beijing; 100039, China; (3) Ministry of Education Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China Corresponding authors:Xi, Ben-Ye(benyexi@bjfu.edu.cn); Cao, Zhi-Guo(wq11ab@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:114-126 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The objective of this study was to explore the differences of five methods for evaluating the PM retention capacity of leaves based on the same experimental materials and leaf area measurement method and to summarize the advantages and disadvantages of each method. In this study, four tree species (Pinus tabuliformis, Platycladus orientalis, Ginkgo biloba, and Platanus occidentalis), which are common in Beijing and have greatly different leaf characteristics, were selected as the research objects. The mass subtraction method (MS), the membrane filter method (MF), the aerosol regenerator method(AR), the scanning electron method (SEM), and the elution weighing method coupled with a particle size analysis based on ultrasonic cleaning (ultrasonic-EWPA) were used to evaluate the PM retention capabilities and characteristics of the leaves of the four tree species. The total time needed and the total cost were measured simultaneously during the evaluation process. The results showed that although the values of PM retention efficiency obtained by different methods were quite different, the ranks of the efficiency of four tree species obtained by different methods were the same or partially the same. Additionally, the results obtained by the methods with the same or similar principles were more overlapped (AR and SEM had the most overlapped results). In addition, 89% of the species ranks of the same index obtained by each method were P. orientalis>P. tabuliformis>P. occidentalis>G. biloba, and the remaining 11% were P. occidentalis>G. biloba>P. orientalis>P. tabuliformis. Among the five methods, ultrasonic-EWPA was the one with the largest number of indexes and the highest cost, and MS was the one with the least number of indexes and the lowest cost. The one that needed most time was MF, while the one that needed the least time was AR. ultrasonic-EWPA and SEM are high input and high output methods. That is to say, although they needed more time and cost, they can prove more information; however, MS was opposite, which resulted in less information but lower time and cost needed. So, it is suitable for roughly evaluating the total PM retention capacities of trees; MF had a medium amount of information, low cost, but required too much time, which needs to be weighed and balanced before selecting this method. The AR method had strict requirements for equipment and parameters and should be used with caution. The results of this study can provide a comprehensive and detailed scientific basis for researchers to choose specific methods in the future.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Particles (particulate matter) Controlled terms:Efficiency - Particle size - Particle size analysis - Reforestation - Ultrasonic cleaning Uncontrolled terms:Airborne particulate matters - Amount of information - Experimental materials - Leaf area measurements - Leaf characteristics - Platycladus orientalis - Quantitative comparison - Retention efficiencies Classification code:753.3 Ultrasonic Applications - 913.1 Production Engineering - 951 Materials Science Numerical data indexing:Percentage 1.10e+01%, Percentage 8.90e+01% DOI:10.13227/j.hjkx.202006054 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126217 Title:Effects of Different Exogenous Plant Hormones on the Antioxidant System and Cd Absorption and Accumulation of Rice Seedlings Under Cd Stress Title of translation:Cd胁迫下不同外源植物激素对水稻幼苗抗氧化系统及Cd吸收积累的影响 Authors:Zhang, Sheng-Nan (1); Huang, Yi-Zong (1); Li, Yan (1); Bao, Qiong-Li (1); Huang, Yong-Chun (1) Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China Corresponding author:Huang, Yi-Zong(yizonghuang@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2040-2046 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the effects of the exogenous addition of plant hormones on the antioxidant system and Cd absorption and accumulation of rice seedlings under Cd stress, the transportation and accumulation of Cd was reduced in plants to alleviate the stress of Cd on the rice. With the rice seedlings of Zhongjiazao 17 as the research object, a hydroponic experiment was carried out with three Cd concentration treatments (0, 5, and 25 μmol•L-1), and four exogenous plant hormone treatments: no plant hormones, 100 μmol•L-1 melatonin (MT), 0.2 μmol•L-1 2, 4-epibrassinolide (EBL), and 0.2 μmol•L-1 jasmonic acid (JA), for a total of 12 treatments, each treatment repeated three times. The contents of Cd in the rice seedlings were analyzed, as well as the content of MDA, POD, CAT, and reduced GSH in the shoots and roots of the rice seedlings. The results indicated that under the stress of 5 μmol•L-1 and 25 μmol•L-1 Cd, the addition of MT, EBL, and JA significantly reduced the MDA content of the shoots by 11%-24%, and the roots and shoots were healthy. On the contrary, the addition of the three exogenous substances all caused an increase in the MDA content in the root system, but the effects of MT and EBL were obvious. Under the 5 μmol•L-1 Cd stress, compared with CK, the MDA contents increased by 45.5% and 20.0% respectively; under 25 μmol•L-1 Cd stress, they increased by 46.2% and 19.8%. The exogenous addition of plant hormones can significantly increase the activity of POD and CAT in the shoots and underground parts of the rice seedlings and reduce the contents of GSH and Cd. Under the 5 μmol•L-1 Cd stress, the Cd content in the shoots of rice plants decreased by 39.4%, 40.1%, and 51.6%, the roots were reduced by 38.9%, 40.2%, and 7.0%. Under the 25 μmol•L-1 Cd stress, the aboveground Cd content was reduced by 18.9%, 14.5%, and 35.6%, and the roots were reduced by 85.3%, 81.1%, and 56.5%. By exogenously adding low-concentration plant hormones MT, EBL, and JA, the stress of Cd on the rice can be alleviated, and the toxic effect of Cd on rice can be reduced.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Seed Controlled terms:Antioxidants - Endocrinology - Hormones - Plants (botany) Uncontrolled terms:Antioxidant systems - Cd concentrations - Hydroponic experiments - Jasmonic acids - Low concentrations - Plant hormone - Research object - Rice seedlings Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 821.4 Agricultural Products Numerical data indexing:Molar_Concentration 1.00e-01mol/m3 to 2.20e-02mol/m3, Molar_Concentration 2.00e-04mol/m3 to 2.20e-02mol/m3, Molar_Concentration 2.50e-02mol/m3 to 2.20e-02mol/m3, Molar_Concentration 5.00e-03mol/m3 to 2.20e-02mol/m3, Percentage 1.10e+01% to 2.40e+01%, Percentage 1.45e+01%, Percentage 1.89e+01%, Percentage 1.98e+01%, Percentage 2.00e+01%, Percentage 3.56e+01%, Percentage 3.89e+01%, Percentage 3.94e+01%, Percentage 4.01e+01%, Percentage 4.02e+01%, Percentage 4.55e+01%, Percentage 4.62e+01%, Percentage 5.16e+01%, Percentage 5.65e+01%, Percentage 7.00e+00%, Percentage 8.11e+01%, Percentage 8.53e+01% DOI:10.13227/j.hjkx.202007290 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003421 Title:Polycyclic Aromatic Hydrocarbons in Surface Soil of China (2000-2020): Temporal and Spatial Distribution, Influencing Factors Title of translation:近20年中国表层土壤中多环芳烃时空分布特征及源解析 Authors:Ma, Yan (1); Cheng, Lu (1); Ruan, Zi-Yuan (1); Shi, Peng-Fei (1); Lu, Chao-Jun (2); Yun, Xiao-Tong (1); Li, Luo-Yan (1); Xu, Yan-Qiu (1); Shi, Yi (3) Author affiliation:(1) School of Chemistry & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing; 100083, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing; 100012, China Corresponding author:Shi, Yi(feather_29@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1065-1072 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the rapid development of China's economy and society, the polycyclic aromatic hydrocarbon (PAH) pollution of surface soil has attracted increasing attention. Based on a systematic review, this study identified 166 relevant papers (published from 2000 to 2020) dealing with the contamination of 16 PAHs in the surface soil of China and summarized the pollution level, temporal, and spatial distribution influencing factors of PAHs with statistics, spatial interpolation analysis, and source analysis methods. The results showed that the surface soil of China has been polluted by human-caused PAHs, with a median concentration of 675.70 μg•kg-1. Although the overall condition is good, some sampling points have been seriously polluted. Among the monomers of PAHs, the concentrations of fluoranthene (Fla) and pyrene (Pyr) are high, while acenaphthylene (Acy) and acenaphthene (Ace) are relatively low. During the survey period, the concentration data of surface soil PAHs are generally within the moderate pollution levels of 313.10-1070.45 μg•kg-1, while the annual changes of PAHs do not show obvious fluctuations and are less affected by oil production and consumption. Statistics and spatial interpolation results show that PAH pollution in the surface soil of China has regional characteristics, where the concentration decreases in order from northwest, north, east, northeast, southwest, and south-central China. The pollution level in most provinces is "contaminated" or "weakly contaminated." From the source analysis results, PAH pollution in surface soils in most areas of China comes from the high-temperature combustion of fossil fuels such as petroleum, biomass, and coal. Heilongjiang and some northwestern regions (e.g., Xinjiang and Tibet) were mainly represented by oil source pollution. Such results could provide a reference for soil environmental management and PAH pollution control in China.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Soil pollution Controlled terms:Coal combustion - Environmental management - Fossil fuels - Interpolation - Mineral oils - Petroleum analysis - Petroleum industry - Polycyclic aromatic hydrocarbons - Soil pollution control - Soil surveys - Soils - Spatial distribution Uncontrolled terms:High-temperature combustion - Median concentration - Polycyclic aromatic hydrocarbon (PAH) - Regional characteristics - Source analysis method - Spatial interpolation - Spatial interpolation analysis - Temporal and spatial distribution Classification code:454.1 Environmental Engineering, General - 483.1 Soils and Soil Mechanics - 513.3 Petroleum Products - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.1 Organic Compounds - 921 Mathematics - 921.6 Numerical Methods DOI:10.13227/j.hjkx.202010190 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710248393 Title:Discussion of Microbial Control Standards of Water Reclamation and Formulation Methods Title of translation:污水再生利用微生物控制标准及其制定方法探讨 Authors:Chen, Zhuo (1); Cui, Qi (1, 2); Cao, Ke-Fan (1); Lu, Yun (1); Wu, Yin-Hu (1); Hu, Hong-Ying (1, 3, 4) Author affiliation:(1) State Key Joint Laboratory of Environmental Simulation and Pollution Control, State Environmental Protection Key Laboratory of Microorganism Application and Risk Control, School of Environment, Tsinghua University, Beijing; 100084, China; (2) China Construction Water & Environment Co., Ltd., Beijing; 100044, China; (3) Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing; 100084, China; (4) Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen; 518055, China Corresponding authors:Lu, Yun(luyun@tsinghua.edu.cn); Hu, Hong-Ying(hyhu@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2558-2564 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The key to water reclamation and reuse is water quality safety insurance and risk control. Microbial risk control is an important issue that requires priority during the safe reuse of reclaimed water. This paper systematically summarizes the control requirements for microbial indicators in China's current water reuse standards, focusing on the necessity and deficiencies of water quality targets and microbial indicator concentration control. The performance targets based on the removal requirements of microorganisms together with the methodology and implementation strategies are introduced in detail for the first time. In the future, it is necessary to further explore the microbial control method of water reclamation based on the combination of water quality targets and performance targets, which could provide support for the safe reuse of reclaimed water in China.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Quality control Controlled terms:Wastewater reclamation - Water conservation - Water quality Uncontrolled terms:Concentration control - Control requirements - Implementation strategies - Microbial control - Microbial indicators - Performance targets - Re-claimed water - Reclamation and reuse Classification code:444 Water Resources - 445.2 Water Analysis - 452.4 Industrial Wastes Treatment and Disposal - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.202010024 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804506 Title:Enhancement Effects and Mechanisms of Microscale Zero Valent Iron on the Performance of Anaerobic Co-digestion of Waste Activated Sludge and Food Waste Title of translation:微米零价铁对剩余活性污泥和餐厨垃圾厌氧联合消化的加强效果及机制 Authors:Chen, Sheng-Jie (1, 2); Yao, Fu-Bing (1, 2); Pi, Zhou-Jie (1, 2); Hou, Kun-Jie (1, 2); He, Li (1, 2); Li, Xiao-Ming (1, 2); Wang, Dong-Bo (1, 2); Yang, Qi (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Hunan University, Changsha; 410082, China; (2) Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha; 410082, China Corresponding author:Yang, Qi(yangqi@hnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:891-899 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Focusing on low biogas yields in the anaerobic co-digestion of waste activated sludge and food waste, the enhancing effects and mechanisms of microscale zero valent iron (mZVI) on anaerobic co-digestion was investigated. The results indicated that the addition of mZVI enhanced the methanogenesis stage of co-digestion but had no significant effect on the solubilization, hydrolysis, and acidification stages. With a dosage of 10 g•L-1 mZVI, the cumulative methane yield (based on VS) within 15 days reached 238.68 mL•g-1, which was 20.05% higher than the control group. The mechanism analysis showed that mZVI promoted electron transport system (ETS) activity (based on INTF/TS), which increased to 21.50 mg•(g•h)-1 with 10 g•L-1 mZVI compared to 13.43 mg•(g•h)-1 in the control group. Furthermore, mZVI enhanced direct interspecies electron transfer (DIET) between specific bacteria and methanogens. Microbial community analysis demonstrated that the abundance of DIET-related microorganisms, such as Syntrophomonas, Methanosarcina, and Methanobacterium, was higher in presence of mZVI.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Anaerobic digestion Controlled terms:Electron transport properties - Food waste - Iron - Microorganisms - Sludge digestion Uncontrolled terms:Anaerobic co-digestion - Electron transfer - Electron transport systems - Enhancement effects - Mechanism analysis - Microbial community analysis - Waste activated sludges - Zero-valent iron Classification code:452.2 Sewage Treatment - 461.9 Biology - 545.1 Iron Numerical data indexing:Age 4.11e-02yr, Mass_Density 1.00e+01kg/m3 to 2.20e-02kg/m3, Percentage 2.01e+01%, Specific_Volume 2.39e-01m3/kg to 2.20e-02m3/kg DOI:10.13227/j.hjkx.202007035 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126240 Title:Identify the Nitrate Sources in Different Land Use Areas Based on Multiple Isotopes Title of translation:基于多同位素的不同土地利用区域水体硝酸盐源解析 Authors:Jin, Zan-Fang (1); Hu, Jing (1); Wu, Ai-Jing (1); Li, Guang-Yao (1); Zhang, Wen-Liao (1); Li, Fei-Li (1) Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310032, China Corresponding author:Li, Fei-Li(lifeili@zjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1696-1705 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Different land uses have different impacts on the water quality of the region. Multiple isotopes (δD-H2O, δ18O-H2O, δ15N-NO3-, and δ18O-NO3-) and the SIAR (stable isotope analysis in R) model were applied to identify the nitrate sources and estimate the proportional contributions of multiple nitrate sources in a river in a typical urban area (the Grand Canal, Hangzhou) and a river in a typical forest and agricultural area (Yuying Riveri). The results indicated that there were different degrees of nitrogen pollution in the Grand Canal and Yuying River; NO3--N and NH4+-N are the predominant forms of nitrogen in the Grand Canal, and the primary form of nitrogen in Yuying River was NO3--N. There was an obvious linear relationship between the hydrogen and oxygen isotopes (R2=0.78). The δD-H2O and δ18O-H2O values for the Grand Canal and Yuying River were distributed along the local meteoric waterline, indicating that precipitation served as the primary water source in these rivers. All of the δ18O-NO3- values of the Grand Canal and Yuying River were lower than 15 ‰. It was revealed that nitrification, rather than denitrification, was the primary N cycling process in the two rivers. The δ15N-NO3-/δ18O-NO3- ratios of some of the samples from the Grand Canal ranged from 1.3 to 2.1, accompanied by low concentrations of DO and NO2-, indicating that denitrification existed in some sections of the Grand Canal. The δ15N-NO3- values of the samples from the Grand Canal (average: 6.1‰) were higher than those from the Yuying River (average: 2.3‰). The NO3- source contributions differed significantly between the Grand Canal and Yuying River. The contributions of NO3- sources in the Grand Canal were sewage/manure (37.0%)>soil nitrogen (35.7%)>chemical fertilizer (19.1%)>precipitation (8.2%), and those in the Yuying River were chemical fertilizer (46.1%)>soil nitrogen (22.8%)>precipitation (17.3%)>sewage/manure (13.8%). The contribution of the sewage/manure was substantially increased in the Grand Canal in the urban area with stronger human activities primarily due to the sporadic discharge of domestic sewage and urban runoff. Chemical fertilizer is the main NO3- source in the Yuying River near the forest and agricultural area, suggesting that the nitrogen pollution caused by agricultural non-point sources was extremely serious. The contribution of precipitation decreased in the areas of substantial human activities. The isotopic fractionation produced by denitrification was affected by the contributions of the NO3- sources, which were calculated by SIAR model. Sewage/manure and chemical fertilizer produced significant impacts, followed by soil nitrogen and precipitation.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:River pollution Controlled terms:Agricultural robots - Denitrification - Forestry - Hydraulic structures - Isotopes - Land use - Nitrates - Nitrogen fertilizers - Precipitation (chemical) - Rivers - Sewage - Soils - Water quality Uncontrolled terms:Agricultural areas - Chemical fertilizers - Isotopic fractionations - Linear relationships - Low concentrations - Nitrogen pollution - Source contributions - Stable-isotope analysis Classification code:403 Urban and Regional Planning and Development - 445.2 Water Analysis - 452.1 Sewage - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.38e+01%, Percentage 1.73e+01%, Percentage 1.91e+01%, Percentage 2.28e+01%, Percentage 3.57e+01%, Percentage 3.70e+01%, Percentage 4.61e+01%, Percentage 8.20e+00% DOI:10.13227/j.hjkx.202009094 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404855 Title:Long-term Storage and Rapid Activity Recovery of ANAMMOX Granular Sludge Title of translation:厌氧氨氧化颗粒污泥的长期保藏及快速活性恢复 Authors:Li, Dong (1); Liu, Ming-Yang (1); Zhang, Jie (1, 2); Zheng, Hui-Ping (1) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin; 150090, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2957-2965 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
At 4℃ and with no substrate, the activity recovery of ANAMMOX granular sludge was examined after 230 days of storage, and the effect of adding two organic carbon sources (glucose and sodium propionate) on the recovery was explored. After 230 days of long-term storage, the activity of ANAMMOX bacteria was 0.013 g•(g•d)-1, which was just 6.02% of the baseline, and the average particle size was 135.05 μm, which was 38.23% lower. The sludge disintegration, black in color. In the activity recovery stage, the R2 and R3 reactors added glucose and sodium propionate as organic carbon sources. The recovery results showed that after 15 days of recovery, the PN content of the R1, R2, and R3 reactors reached 126.30, 188.86, and 168.82 mg•g-1, respectively, and the activity of the ANAMMOX bacteria was improved, reaching 0.145, 0.185, and 0.126 g•(g•d)-1, respectively. The R2 reactor with glucose as the organic carbon source had the highest ANAMMOX bacteria activity, which recovered 85.65% before preservation, and the total nitrogen removal rate reached 81.61%. On the 20th day, the particle sizes of the ANAMMOX granular sludge in the R1, R2, and R3 reactors were 289.81, 359.66, and 314.37 μm, respectively, indicating that the long-term preservation of ANAMMOX granular sludge is not an insurmountable problem. Furthermore, adding glucose during the recovery phase can not only effectively increase the EPS content and promote particle growth and adhesion, but also enrich the reaction pathways of ANAMMOX, enhancing recovery rates.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Nitrogen removal Controlled terms:Bacteria - Disintegration - Glucose - Granular materials - Organic carbon - Particle size - Reaction rates - Recovery - Sodium - Volatile fatty acids - Wastewater treatment Uncontrolled terms:Activity recovery - Average particle size - Long-term preservation - Long-term storage - Reaction pathways - Sludge disintegration - Sodium propionate - Total nitrogen removal Classification code:452.4 Industrial Wastes Treatment and Disposal - 549.1 Alkali Metals - 802.2 Chemical Reactions - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Age 4.11e-02yr, Age 6.30e-01yr, Percentage 3.82e+01%, Percentage 6.02e+00%, Percentage 8.16e+01%, Percentage 8.57e+01%, Size 1.35e-04m, Size 3.14e-04m DOI:10.13227/j.hjkx.202011159 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003289 Title:Microbial Community Structure of Waste Water Treatment Plants in Different Seasons Title of translation:不同季节城市污水处理厂微生物群落特性 Authors:He, Yun (1, 2, 3); K.-X., Li; J.-W., Wang; W., Wang; P.-C., Fan; H.-H., Chen; J.-J., Wang Author affiliation:(1) Beijing Drainage Group Co., Ltd., Beijing; 100044, China; (2) Research and Development Center of Beijing Drainage Group Technology, Beijing; 100124, China; (3) Beijing Wastewater Resourceful Engineering Technology Research Center, Beijing; 100124, China Corresponding author:Li, Kui-Xiao(kuixiao_li@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1488-1495 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Wastewater treatment plants (WWTPs) have different treatment effects during different seasons due to changes in water quality and temperature. To understand bacterial community structure and diversity dynamics in the WWTPs, this study employed high-throughput sequencing technology during winter and summer. A total of 60 activated sludge samples were collected in five WWTPs in Beijing with different treatment processes in summer (temperature=28℃±2℃, water temperature=24.9℃±1.1℃) and winter (temperature=0℃±3℃, water temperature=16.8℃±1.3℃). The relative abundances of dominant bacterial genera in activated sludge varied significantly between the WWTPs but microbial community structure was typically similar between different treatment units (i.e., the anaerobic tank, anoxic tank, and aerobic tank) at each WWTP. At the same time, different bacteria dominated in winter and summer, when the relative abundance of SJA-15, Ferruginibacter, and Blasocatellaceae was 6.07%, 4.50%, and 4.44% respectively, when the relative abundance of Nitrospira, Methylotenera, and RBG-13-54-9 in winter was 10.17%, 3.96%, and 3.28%, respectively. Correlation analysis showed that temperature, total nitrogen (TN), NH4+-N, total phosphorus (TP), and chemical oxygen demand (COD) were the main environmental factors affecting microbial community structure, of which temperature had the greatest effect on species composition followed by TN. Furthermore, a predictive analysis of functional enzymes indicated that the abundance of key enzymes involved in the nitrogen cycle in the activated sludge of WWTPs is higher in winter than that in summer. These results show that temperature, water quality, and treatment process affect bacterial community structure (i.e., dominance and abundance) in WWTP activated sludge.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Wastewater treatment Controlled terms:Activated sludge process - Anoxic water - Bacteria - Chemical oxygen demand - Enzymes - Nitrogen - Predictive analytics - Sewage treatment plants - Tanks (containers) - Temperature - Water quality - Water treatment - Water treatment plants Uncontrolled terms:Bacterial community structure - Correlation analysis - Different treatments - Environmental factors - High-throughput sequencing - Microbial community structures - Species composition - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 445.2 Water Analysis - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 619.2 Tanks - 641.1 Thermodynamics - 804 Chemical Products Generally Numerical data indexing:Percentage 1.02e+01%, Percentage 3.28e+00%, Percentage 3.96e+00%, Percentage 4.44e+00%, Percentage 4.50e+00%, Percentage 6.07e+00% DOI:10.13227/j.hjkx.202007015 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247572 Title:Effects of Activated Carbon on the Fate of Antibiotic Resistance Genes During Anaerobic Digestion of the Organic Fraction of Municipal Solid Waste Title of translation:活性炭对城市有机固废厌氧消化过程抗生素抗性基因行为特征的影响 Authors:Ma, Jia-Ying (1, 2, 3); Wang, Pan-Liang (1, 2, 3); Wang, Bing-Han (1, 2, 3); Su, Ying-Long (1, 2, 3); Xie, Bing (1, 2, 3) Author affiliation:(1) Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai; 200241, China; (2) Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai; 200241, China; (3) Shanghai Institute of Pollution Control and Ecological Security, Shanghai; 200092, China Corresponding author:Xie, Bing(bxie@des.ecnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2413-2421 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The organic fraction of municipal solid waste (OFMSW) has become one of the sources and reservoirs of antibiotic resistance genes (ARGs). It is essential to explore the fate of ARGs during biological treatment of OFMSW. Therefore, the changes in several types of ARGs and integron genes during anaerobic digestion of the OFMSW were analyzed by quantitative PCR. Furthermore, the effects of different particle sizes of activated carbon on the behaviors of the target genes and the potential microbial mechanisms of ARGs dynamics were investigated. The results showed that the total ARGs in the initial system were reduced after anaerobic digestion with or without the presence of activated carbon. The removal rate of the absolute abundance of total ARGs was 29.95%-63.40%. In the final system of anaerobic digestion of the OFMSW, the abundance of total ARGs in powdered activated carbon (PAC) groups was significantly higher than that in the control group (P<0.05). The supplementation of PAC inhibited the reduction of ARGs, and the supplementation of granular activated carbon had no significant effect on the change in ARGs. The potential host bacteria of ARGs were mainly Clostridia, Bacteroidia, and Synergistia during anaerobic digestion. The enrichment of host bacteria caused by PAC addition was the main reason for the increase in the target genes. Moreover, Clostridia might have been the main driving factor for the growth and decline of ARGs. These results will help us to understand the dissemination of ARGs and the impacts of activated carbon addition on ARGs during anaerobic digestion of the OFMSW.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Anaerobic digestion Controlled terms:Activated carbon - Antibiotics - Bacteria - Genes - Municipal solid waste - Polymerase chain reaction Uncontrolled terms:Antibiotic resistance genes - Biological treatment - Different particle sizes - Driving factors - Granular activated carbons - Organic fraction of municipal solid wastes - Powdered activated carbon - Quantitative PCR Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 801.2 Biochemistry - 804 Chemical Products Generally Numerical data indexing:Percentage 2.99e+01% to 6.34e+01% DOI:10.13227/j.hjkx.202009250 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779880 Title:Effects of Nitrogen Fertilizer Application Times and Nitrification Inhibitor on N2O Emission from Potted Maize Title of translation:氮肥分施次数及硝化抑制剂对盆栽玉米N2O排放的影响 Authors:Fu, Pei-Jiao (1); Ji, Heng-Kuan (1); He, Qiu-Xiang (1); Tang, Shui-Rong (1); Wang, Hong-Hao (1); Wu, Yan-Zheng (1); Meng, Lei (1) Author affiliation:(1) College of Tropical Crops, Hainan University, Haikou; 570228, China Corresponding authors:Wu, Yan-Zheng(wyz198712@163.com); Meng, Lei(menglei94@sohu.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4538-4547 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Rational application of nitrogen is an important strategy for increasing yield while reducing environmental pollution due to nitrogen. Pot experiments were conducted to study the effects of different application times on maize yield and soil N2O emission under conditions of equal nitrogen content, and to explore the relationship between the abundance of nitrogen conversion functional genes and N2O emission. Four treatments were used, namely a control (CK, no urea), one-time application (S1, one application of 0.5 g•kg-1 urea+nitrification inhibitor), two separate applications [S2, two applications of 0.5 g•kg-1 urea (40% and 60% respectively)] and three separate applications (S3, 0.5 g•kg-1 urea was divided into three different applications: 20%, 40% and 40% respectively). The results showed that: ① nitrogen application promoted soil acidification, and the degree of soil acidification varied significantly with different application times. More applications of nitrogen led to stronger soil acidification. Nitrogen application significantly increased the ear yield and stem biomass of fresh table maize, but different nitrogen application times may alter soil pH, leading to differences in the degree of nitrogen uptake and utilization in plants. While the S3 treatment significantly reduced soil pH, it also reduced the cumulative nitrogen uptake and utilization in the plants, resulting in a high cumulative N2O emission. Compared with the S3 treatment, the yield was 40.21% and 42.55% higher in the S1 and S2 treatments, and the cumulative N2O emission decreased by 79.4% and 20.9%, respectively. ② N2O emission was positively correlated with the abundance of AOB and nirK genes, which were the main contributors to N2O emission. S1 significantly decreased the abundance of AOB and nirK genes and N2O emissions, while S2 and S3 significantly increased the abundance of nirK and nirS genes and decreased the abundance of nosZ genes after fertilization, promoting N2O emissions. Nitrogen application times affect the functional genes of the nitrogen transformation process, and thus affect N2O emissions. In conclusion, a one-time application of urea combined with DCD only guarantees high maize yield and improves the efficient use of nitrogen, but also reduces greenhouse gas emissions. Thus, it is the recommended nitrogen fertilization mode for the cultivation of fresh corn in Hainan.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Nitrogen fertilizers Controlled terms:Acidification - Gas emissions - Genes - Greenhouse gases - Metabolism - Nitrification - Soils - Urea Uncontrolled terms:Environmental pollutions - Fertilizer applications - Functional genes - Nitrification inhibitor - Nitrogen conversion - Nitrogen fertilization - Nitrogen transformations - Soil acidifications Classification code:451.1 Air Pollution Sources - 461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 822.2 Food Processing Operations Numerical data indexing:Percentage 2.00e+01%, Percentage 2.09e+01%, Percentage 4.00e+01%, Percentage 4.02e+01%, Percentage 4.25e+01%, Percentage 6.00e+01%, Percentage 7.94e+01% DOI:10.13227/j.hjkx.202101003 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126222 Title:Hydrochemistry Characteristics and Estimation of the Dissolved Inorganic Carbon Flux in the Caohai Lake Wetland Catchment of Guizhou Province Title of translation:贵州威宁草海流域地下水水化学特征及无机碳通量估算 Authors:Cao, Xing-Xing (1); Wu, Pan (1); Yang, Shi-Di (1); Liu, Shan (1); Liao, Jia-Hao (1) Author affiliation:(1) Key Laboratory of Karst Georesources and Environment, Ministry of Education, College of Resource and Environmental Engineering, Guizhou University, Guiyang; 550025, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1761-1771 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Caohai Lake wetland in Weining County, Guizhou Province, is the largest karst wetland in China, and karst groundwater is an essential source of recharge and material. This study collected groundwater from the Caohai Lake catchment during the wet season, dry season, and flat season, and the main ion components of the groundwater were analyzed. The hydrochemistry characteristics and main ion sources of the groundwater were revealed, and the preliminary estimates of the karst carbon sink flux in the Caohai Lake catchment were calculated based on the solute load method. The results indicated that the water chemistry of the groundwater in the Caohai Lake catchment is primarily the HCO3-Ca type, and individual groundwater points in the southeast are the SO4-Ca type during the flat season. The dominant ions in the groundwater are Ca2+, Mg2+, and HCO3-. Seasonally, the average concentrations of SO42- and Mg2+ decreased in the order of flat season>dry season>wet season, while the average concentration of NO3- decreased in the order of wet season>dry season>flat season, and the seasonal variation of the other ions were not significant. Spatially, the concentrations of Ca2+ and HCO3- in the groundwater in the northern part of Caohai Lake, of K+, Na+, and Cl- in the southwest, and of Mg2+, NO3-, and SO42- in the southeast were relatively high. Ca2+, Mg2+, and HCO3- in the groundwater were primarily controlled by the dissolution of carbonate rocks, and carbonic acid, sulfuric acid and nitric acid were all involved in the weathering of carbonate rocks in the catchment. Most of the NO3- in the groundwater was affected mostly by the soil nitrogen and domestic sewage, while NO3- in the southeast groundwater was primarily affected by agricultural activities. The sources of K+, Na+, Cl-, and SO42- exhibited no obvious temporal and spatial differences, and the K+, Na+, and Cl- were mainly affected by human activities, while SO42- was mostly derived from the dissolution of sulfur compounds in the formation. The studied area has a high proportion of allogenic acids (sulfuric acid and nitric acid) participating in the weathering of carbonate rocks, which is the highest in the flat season and the lowest in wet season. After deducting the proportion of allogenic acids participating in the weathering of carbonate rocks, the average inorganic carbon flux in the Caohai Lake catchment is preliminarily estimated to be approximately 181.5 t•a-1, and the average karst groundwater transport of HCO3- to Caohai Lake is approximately 1 144.1 t•a-1.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Sulfur compounds Controlled terms:Agricultural robots - Calcium compounds - Carbon - Carbon dioxide - Carbonates - Carbonation - Catchments - Dissolution - Drought - Forestry - Groundwater - Groundwater geochemistry - Hydrochemistry - Ion sources - Lakes - Nitric acid - Runoff - Sedimentary rocks - Sewage - Sulfuric acid - Weathering - Wetlands Uncontrolled terms:Agricultural activities - Average concentration - Dissolved inorganic carbon - Guizhou Province - Human activities - Karst groundwater - Seasonal variation - Temporal and spatial Classification code:444 Water Resources - 452.1 Sewage - 481.2 Geochemistry - 482.2 Minerals - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 932.1 High Energy Physics DOI:10.13227/j.hjkx.202007163 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404830 Title:Multidimensional Verification of Anthropogenic VOCs Emissions Inventory Through Satellite Retrievals and Ground Observations Title of translation:基于卫星遥感和地面观测的人为源VOCs区域清单多维校验 Authors:Wang, Yue (1); Wei, Wei (1, 2); Ren, Yun-Ting (1); Wang, Xiao-Qi (1, 2); Chen, Sai-Sai (1); Cheng, Shui-Yuan (1, 2) Author affiliation:(1) Faculty of Environment and Life, Beijing University of Technology, Beijing; 100124, China; (2) Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing; 100124, China Corresponding author:Wei, Wei(weiwei@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2713-2720 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this paper, a regional emissions inventory of anthropogenic VOCs was established based on the traditional emissions factor method for the Beijing-Tianjin-Hebei (BTH) region, followed by a multidimensional calibration study based on regional satellite remote sensing information for formaldehyde and typical urban ground VOCs. Inventory calculations showed that the VOCs emissions in BTH in 2013, 2015, and 2017 were 2 026 700, 2 073 400, and 1 934 200 tons, respectively, comprising alkanes (29.83% to 30.72%), unsaturated hydrocarbons (16.54% to 17.68%), aromatic hydrocarbons (27.14% to 27.51%), aldehydes (8.75% to 9.52%), ketones (8.13% to 9.04%), and aldehydes and ketones lipids (5.13% to 6.60%). During 2013-2017, the emission of VOCs in Zhangjiakou, Qinhuangdao, and Hengshui increased slightly (1.10% to 1.66% per year); emissions in Xingtai and Handan decreased slightly (-1.46% to -1.12% per year); and emissions in Chengde, Tangshan, Baoding, and Cangzhou were stable. There trends were consistent with the inter-annual trend of satellite-derived HCHO column concentrations. However, in Beijing, Tianjin, Langfang, and Shijiazhuang, annual variations in VOCs emissions (-6.51%, -3.30%, 2.16%, and 0.11% per year) and HCHO column concentrations (-1.17%, 7.19%, -0.24%, and 6.68% per year) were observed, respectively. In the regional VOCs inventory, a good linear correlation (R>0.5) was achieved between the grid emissions of VOCs and HCHO column concentrations in urban areas, while the correlation was only 0.33 in suburban areas. This is mainly due to the important influence of secondary conversion of VOCs originating from natural sources to HCHO in suburban areas. In addition, ground-level VOCs concentrations were observed in the urban areas of Beijing and Handan, where the emission ratios (ERs) of VOCs and CO were regressed. The ERs of most hydrocarbons were in good agreement with the regressed ERs, but the ERs of ethane were significantly lower (-156% to -73%) and the ERs of aromatic hydrocarbons above C8 were relatively high (54% to 74%). In general, the regional anthropogenic VOCs emissions inventory established in this paper offers high accuracy and reliability.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Aromatic hydrocarbons Controlled terms:Aldehydes - Ketones - Mineral oils - Remote sensing - Satellites Uncontrolled terms:Annual variations - Emissions factors - Emissions inventory - Ground observations - Linear correlation - Satellite remote sensing - Satellite retrieval - Unsaturated hydrocarbons Classification code:513.3 Petroleum Products - 655.2 Satellites - 804.1 Organic Compounds Numerical data indexing:Mass 8.47e+08kg, Percentage -1.17e+00%, Percentage -1.46e+00% to -1.12e+00%, Percentage -1.56e+02% to -7.30e+01%, Percentage -2.40e-01%, Percentage -3.30e+00%, Percentage -6.51e+00%, Percentage 1.10e+00% to 1.66e+00%, Percentage 1.10e-01%, Percentage 1.65e+01% to 1.77e+01%, Percentage 2.16e+00%, Percentage 2.71e+01% to 2.75e+01%, Percentage 2.98e+01% to 3.07e+01%, Percentage 5.13e+00% to 6.60e+00%, Percentage 5.40e+01% to 7.40e+01%, Percentage 6.68e+00%, Percentage 7.19e+00%, Percentage 8.13e+00% to 9.04e+00%, Percentage 8.75e+00% to 9.52e+00% DOI:10.13227/j.hjkx.202010006 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688806 Title:Occurrence of Antibiotic Resistance Genes and Bacterial Community Structure of Different Sludge Samples During Microwave Pretreatment-Anaerobic Digestion Title of translation:不同污泥在微波预处理-厌氧消化过程中抗性基因分布及菌群结构演替 Authors:Li, Hui-Li (1); Wu, Cai-Yun (1, 2); Tang, An-Ping (2); Tong, Juan (2, 3, 4); Wei, Yuan-Song (2, 3, 4) Author affiliation:(1) School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; (2) State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Tong, Juan(hittj@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:323-332 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The waste sludge of municipal wastewater treatment plants is an important reservoir for antibiotic resistance genes (ARG). It is necessary to explore the fate of ARG, microbial community succession, and the correlations between them. Therefore, the distribution of ARG and the microbial community structure of waste sludge from wastewater treatment plants with A2O and A2O-MBR processes during microwave pretreatment and anaerobic digestion were studied in this research. The results showed that the occurrence of ARG and the microbial community structure were quite different in the waste sludge of A2O and A2O-MBR processes. The microwave pretreatment did not change the microbial community much, whereas the community structure of the digested sludge with pretreatment showed significant differences. Anaerobic digestion had a conformity effect on the distribution of ARG and MGE in the digested sludge with or without pretreatment. Among genes, ermF, qnrS, and blaNDM-1 were the most difficult to be reduced ARG and were prone to propagation during anaerobic digestion. The influence of biomass, ammonia nitrogen, and phosphorus on the distribution of ARG and MGE was higher than that of other environmental factors. The sludge characteristics also showed important impacts on the microbial community, especially on some genera with specific functions. These results could help people to better understand the spread and control of ARG during sludge anaerobic digestion.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Anaerobic digestion Controlled terms:Ammonia - Antibiotics - Genes - Microorganisms - Sewage pumping plants - Sewage treatment plants - Sludge digestion - Wastewater treatment - Water treatment plants Uncontrolled terms:Antibiotic resistance genes - Bacterial community structure - Environmental factors - Microbial community structures - Microwave pretreatment - Municipal wastewater treatment plants - Sludge characteristics - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 461 Bioengineering and Biology - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202006079 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110403876 Title:MAIAC AOD and PM2.5 Mass Concentrations Characteristics and Correlation Analysis in Beijing-Tianjin-Hebei and Surrounding Areas Title of translation:京津冀及周边MAIAC AOD和PM2.5质量浓度特征及相关性分析 Authors:Jin, Jian-Nan (1); Yang, Xing-Chuan (2); Yan, Xing (2); Zhao, Wen-Ji (1) Author affiliation:(1) College of Resources Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) College of Global Change and Earth System Science, Beijing Normal University, Beijing; 100875, China Corresponding author:Zhao, Wen-Ji(zhwenji1215@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2604-2615 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the MAIAC AOD and PM2.5 mass concentration data for the Beijing-Tianjin-Hebei region and surrounding areas from 2014 to 2018, the temporal and spatial differences in Aerosol Optical Depth (AOD) and PM2.5 mass concentrations were explored and their correlation was analyzed by linear regression. The results show that the daily average concentration of PM2.5 exceeds the standard for 33% and 57% of measurements based on the daily average standard values of the World Health Organization IT.1 and IT.2, respectively, indicating serious pollution levels. The annual average concentrations of PM2.5 and Terra and Aqua MAIAC AOD all show downward trends. The PM2.5 concentrations are high in winter and spring and low in summer and autumn; Terra and Aqua AOD values are high in spring and summer and low in autumn and winter. The seasonal and annual average concentrations of PM2.5 and AOD all show the regional pattern of "low in the north and high in the south". High-value areas are mainly located in southern Hebei, southwestern Shanxi, western Shandong, and northern Henan, while low-value areas are mainly located in northwestern Shanxi, northern Hebei, and eastern Shandong. The annual average concentration of PM2.5 is between 27 and 99μg•m-3, and the annual average AOD is between 0.20 and 0.69. The correlation between Aqua AOD and PM2.5 concentration is strong whereas and the correlations between Terra AOD, Aqua AOD, and PM2.5vary significantly in different seasons; overall, correlations are strongest in spring and winter and weakest in summer and autumn. After vertical-humidity correction, the correlation between satellite AOD and PM2.5 data is significantly improved.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Optical correlation Controlled terms:Springs (components) Uncontrolled terms:Aerosol optical depths - Annual average concentration - Average concentration - Beijing-tianjin-hebei regions - Correlation analysis - PM2.5 concentration - Temporal and spatial - World Health Organization Classification code:601.2 Machine Components - 741.1 Light/Optics Numerical data indexing:Percentage 3.30e+01%, Percentage 5.70e+01% DOI:10.13227/j.hjkx.202009200 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688810 Title:Distribution and Ecological Risk Assessment of Antibiotics in the Songhua River Basin of the Harbin Section and Ashe River Title of translation:松花江哈尔滨段及阿什河抗生素的分布规律与生态风险评估 Authors:Yang, Shang-Le (1); Wang, Xu-Ming (2); Wang, Wei-Hua (3); Hu, Xue-Ying (1); Gao, Li-Wei (1); Sun, Xing-Bin (1) Author affiliation:(1) School of Forestry, Northeast Forestry University, Harbin; 150040, China; (2) Beijing Agricultural Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing; 100097, China; (3) Harbin Environmental Monitoring Center Station, Harbin; 150076, China Corresponding author:Sun, Xing-Bin(sunxingbin1025@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:136-146 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Solid phase extraction (SPE) and high-performance liquid chromatography-mass spectrometry (HPLC-MS) were used to detect and analyze the distribution of 10 antibiotics including sulfonamides, fluoroquinolones, and macrolides in the Harbin section of Songhua River basin and Ashe River, a tributary of Songhua River. The correlation between the antibiotic concentration and water quality indexes was analyzed and the ecological risks were evaluated. The results showed that only six antibiotics were detected in the entry section of Harbin city on the Songhua River and the concentration was relatively low. However, nine antibiotics were detected in the exit section and only sulfamethazine (SM1) was not detected. The concentrations of macrolide antibiotics increased most significantly, followed by those of sulfonamides and fluoroquinolones. The inflow of three tributaries in Harbin city was the direct cause of the increase in antibiotic concentration in the Songhua River. Only sulfapyridine (SMPD) was not detected in the upper section of Ashe River. Ten antibiotics were detected in the section where the Ashe River enters the Songhua River. The other nine antibiotics were the highest except norfloxacin (NOR). Wastewater discharged from four sewage treatment plants along Ashe River is an important factor affecting the concentration of antibiotics in the Ashe River. Correlation analysis shows that three kinds of antibiotics in the Songhua River have certain positive correlations with ammonia nitrogen, total phosphorus, and total organic carbon. There is a significant positive correlation between the three kinds of antibiotics and ammonia nitrogen and total phosphorus in the Ashe River system, indicating that the water quality indexes of the Harbin section of Songhua River and Ashe River are closely related to their antibiotic concentrations. The results of ecological risk assessment showed that macrolide antibiotics in the Harbin section of Songhua and Ashe Rivers had certain ecological risks.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Rivers Controlled terms:Amides - Ammonia - Antibiotics - Ecology - High performance liquid chromatography - Mass spectrometry - Nitrogen - Organic carbon - Phase separation - Phosphorus - Quality control - Risk assessment - Sewage treatment plants - Sulfur compounds - Wastewater treatment - Water quality - Watersheds Uncontrolled terms:Antibiotic concentration - Ecological risk assessment - High performance liquid chromatography-mass spectrometries - Macrolide antibiotics - Positive correlations - Solid-phase extraction - Songhua river basins - Water quality indexes Classification code:444.1 Surface Water - 445.2 Water Analysis - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 454.3 Ecology and Ecosystems - 461.6 Medicine and Pharmacology - 641.1 Thermodynamics - 801 Chemistry - 804 Chemical Products Generally - 913.3 Quality Assurance and Control - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202005170 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003406 Title:Characterization of Volatile Organic Compounds (VOCs) Using Mobile Monitoring Around the Industrial Parks in the Yangzte River Delta Region of China Title of translation:基于走航监测的长三角工业园区周边大气挥发性有机物污染特征 Authors:Wang, Hong-Li (1); Gao, Ya-Qin (1); Jing, Sheng-Ao (1); Lou, Sheng-Rong (1); Hu, Qing-Yao (1); An, Jing-Yu (1); Wu, Yu-Hang (1); Gao, Wei (2); Zhu, Liang (3); Huang, Cheng (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (2) Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou; 510632, China; (3) TOFWERK China, Nanjing; 211800, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1298-1305 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Volatile organic compounds (VOCs) play important roles in the formation of ozone and fine particles in the troposphere. Industrial parks emit significant amounts of VOCs in China, while few studies have characterized them. In the present study, a mobile platform was employed to measure the levels and composition VOCs around industrial parks in the Yangzte River Delta region. The average concentration of VOCs ranged from 39 μg•m-3 (5% percentile) to 533 μg•m-3 (95% percentile) with an average of 183 μg•m-3, which was three times that of ambient concentrations. Maximum VOC concentrations ranged from 307 μg•m-3 (5% percentile) to 12 006 μg•m-3 (95% percentile) with an average of 2 812 μg•m-3. The frequency of abnormal peak values was as high as 64% across all the industrial parks, of which toluene (32%), xylene (18%), benzene (9%), and>C9 aromatics (19%) were the most common species. Differences in VOC characteristics were observed among the different types of industrial parks. Specifically, highest concentrations of VOCs were observed in textile industrial parks followed by chemical, painting, and petrochemical industrial parks, and VOC concentrations in electronics industrial parks were the lowest. Importantly, species measured using the mobile platform only contributed ~50% of VOCs present in ambient samples, indicating that the concentrations of VOCs in the industrial parks were underestimated overall. These results can inform measures to control VOC pollution in industrial parks in China.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:River pollution Controlled terms:Drilling platforms - Pollution control - Volatile organic compounds Uncontrolled terms:Ambient concentrations - Average concentration - Common species - Fine particles - Industrial parks - Mobile monitoring - Mobile platform - River deltas Classification code:453 Water Pollution - 511.2 Oil Field Equipment - 804.1 Organic Compounds Numerical data indexing:Percentage 1.80e+01%, Percentage 1.90e+01%, Percentage 3.20e+01%, Percentage 5.00e+00%, Percentage 6.40e+01%, Percentage 9.00e+00%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202007265 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582431 Title:Correlation Between Microplastics Pollution and Eutrophication in the Near Shore Waters of Dianchi Lake Title of translation:滇池近岸水体微塑料污染与富营养化的相关性 Authors:Yuan, Hai-Ying (1); Hou, Lei (1); Liang, Qi-Bin (1); Li, Jia-Chen (1); Ren, Jia (1) Author affiliation:(1) College of Ecology and Environment, Southwest Forestry University, Kunming; 650224, China Corresponding author:Liang, Qi-Bin(qbliang@swfu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3166-3175 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Microplastics have been found in many environmental media such as sea water, coastal tidal flats, terrestrial water, sediments, and organisms. Microplastics pollution in inland freshwater lakes have received extensive attention; however, the correlation between eutrophication and microplastics pollution in freshwater lakes remains unclear. In this study, 24 sampling sites were set up in the near shore surface waters of Dianchi Lake, and the pollution characteristics of microplastics such as abundance, composition, particle size, color, and form were evaluated. Water quality parameters related to eutrophication state were analyzed, and the eutrophication indices were further calculated. Specifically, sample pre-treatment was conducted according to the method issued by National Oceanic and Atmospheric Administration (NOAA) of the United States. The color and morphological characteristics of microplastic samples were observed using a stereoscopic microscope, and counts and particle size measurements were performed using Nano Measure 1.2 software. Parts of the samples were selected, and the polymer composition analysis was performed using micro-Fourier Transform infrared (μ-FTIR) spectroscopy. The indices related to eutrophication level evaluation were tested according to the experimental standard methods issued by the Ministry of Ecology and Environment of China. The results showed that the abundance of microplastics in the near shore waters of Dianchi Lake was between 800 and 6 000 n•m-3, with an average value of 2 867 n•m-3. The types of polymers detected were polyethylene terephthalate (PET), polyetherurethane (PEU), polypropylene (PP), polyethylene (PE), and polyvinyl acetate (PVAc), respectively. The diameter proportion of microplastics in the range of 0.2-0.5 mm was the highest. Fiber microplastics accounted for the most observed type, followed by fragments and films. Among the 24 monitoring sites, it was found that proportions of severe, moderate, and mild eutrophication and mesotrophication sites accounted for 8.33%, 58.33%, 29.17%, and 4.17% of the total sampling sites, respectively, and the main pollutant was total nitrogen (TN). Microplastics abundances in the near shore waters of Dianchi Lake were significantly positively correlated with TN concentrations (P<0.01), whereas they were negatively correlated with chlorophyll a(Chl-a)concentrations, not reaching a significant level (P>0.05). The microplastics abundance and TN concentrations in the north bank water near the main urban area of Kunming were significantly higher than those in the other three banks. Microplastics and TN were considered to potentially have the same origin and be attributed to the tail water discharge from WWTPs.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Lake pollution Controlled terms:Aliphatic compounds - Coastal engineering - Eutrophication - Fourier transform infrared spectroscopy - Lakes - Microplastic - Particle size - Particle size analysis - Plastic bottles - Polyethylene terephthalates - Polypropylenes - Polyvinyl acetates - River pollution - Seawater - Stereo image processing - Water quality Uncontrolled terms:Environmental media - Fourier transform infra reds - Morphological characteristic - National Oceanic and Atmospheric Administration - Particle size measurement - Polyethylene terephthalates (PET) - Polyvinyl acetates (PVAc) - Water quality parameters Classification code:407.3 Coastal Engineering - 445.2 Water Analysis - 453 Water Pollution - 471.4 Seawater, Tides and Waves - 694.2 Packaging Materials - 723.2 Data Processing and Image Processing - 801 Chemistry - 815.1.1 Organic Polymers - 951 Materials Science Numerical data indexing:Percentage 2.92e+01%, Percentage 4.17e+00%, Percentage 5.83e+01%, Percentage 8.33e+00%, Size 2.00e-04m to 5.00e-04m DOI:10.13227/j.hjkx.202012100 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804527 Title:Periphytic Algae Community Structure and Its Relation to Environment Factors in the Main Stream of the Songhua River from 2014 to 2019 Title of translation:松花江干流2014~2019年夏季着生藻类群落结构特征及其对环境因子的响应 Authors:Yu, Zong-Ling (1); Chen, Wei (1); Zhao, Ran (1); Li, Zhong-Yu (1); Dong, Ying-Li (1); Zhang, Rui (1); Wang, Ye-Yao (2); Jin, Xiao-Wei (2) Author affiliation:(1) Ecological Environmental Monitoring Central Station of Heilongjiang Province, Harbin; 150056, China; (2) China National Environment Monitoring Centre, Beijing; 100012, China Corresponding author:Jin, Xiao-Wei(jinxw@cnemc.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:819-830 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Periphytic algae are often used as an indicator to evaluate water quality. Here, the community structure of periphytic algae and its relationship with environment factors were analyzed in the main stream of the Songhua River during the summers of 2014 to 2019. The status and trends in ecological water quality were also evaluated based on bioassessments. Phytoplankton species belonging to 4 phyla and 58 genera were recorded, including 28 Bacillariophyta genera, 17 Chlorophyta genera, 10 Cyanophyta genera, and 3 Euglenophyta genera; Bacillariophyta, Chlorophyta, and Cyanophyta accounted for 48.28%, 29.31%, and 17.24% of the community, respectively. Cell densities varied between 1.29×104 and 8.42×104 ind•cm-3, with an average of 4.35×104 ind•cm-3. The dominant genera were Cyclotella, Melosira, Asterionella, Cymbella, Synedra, Pinnularia, Navicula, and Scenedesmus. The physicochemical water quality showed notable changes during the past six-year monitoring period. Specifically, the dissolved oxygen content increased year on year; ammonia nitrogen, total phosphorus, and total nitrogen first increased and then decreased; and, overall, water quality significantly improved in 2019. Relationship between periphytic algae and environmental factors was further examined using redundancy analysis (RDA), which showed that time was the main factor driving the succession of algal community structure. Dissolved oxygen (DO), ammonia nitrogen (NH4+-N), total nitrogen (TN), total phosphorus (TP), five-day biochemical oxygen demand (BOD), and chemical oxygen demand (COD) were also important environmental variables affecting algal community structure.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Dissolved oxygen Controlled terms:Algae - Ammonia - Biochemical oxygen demand - Nitrogen - Phosphorus - Quality control - Rivers - Water quality Uncontrolled terms:Biochemical oxygen demands (BOD) - Community structures - Dissolved oxygen contents - Environmental factors - Environmental variables - Physico-chemical water qualities - Phytoplankton species - Redundancy analysis (RDA) Classification code:445.2 Water Analysis - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 1.72e+01%, Percentage 2.93e+01%, Percentage 4.83e+01% DOI:10.13227/j.hjkx.202007175 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582371 Title:Analysis of Spatial Distribution and Influencing Factors of Nitrogen and Phosphorus Fertilizer Application Intensity in Chengdu Plain Title of translation:成都平原氮磷化肥施用强度空间分布及影响因素分析 Authors:Liu, Qi-Xin (1); Wang, Chang-Quan (1); Li, Bing (1); Zhao, Hai-Lan (1); Fang, Hong-Yan (1); Deng, Xi (1); Li, Qi-Quan (1) Author affiliation:(1) College of Resources, Sichuan Agriculture University, Chengdu; 611130, China Corresponding author:Li, Qi-Quan(liqq@lreis.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3555-3564 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The spatial distribution of fertilization intensity and its influencing factors are significant for the accurate management of fertilization and pollution prevention and control. Previous studies are mostly limited to the discussion of human factors that influences the spatial distribution of fertilization intensity while ignoring natural geographical factors. Based on the chemical fertilizer survey data collected from 23 492 sites in Chengdu Plain and combined with Geostatistics analysis and Geographic Information System (GIS) technology, the spatial distribution characteristics and influencing factors of average nitrogen and phosphorus fertilizer application intensity from 2010 to 2015 in this region were explored. The results show that: ① the average annual application intensity of nitrogen and phosphorus fertilizer in the study area from 2010 to 2015 is generally in the low and medium risk intensity of 120-360 kg•hm-2 and 60-180 kg•hm-2. The high risk intensity is mainly distributed in the grain (fruit) and vegetable growing areas such as Pidu, Pengzhou, Shifang, Longquanyi and Jintang, while the relatively low value areas are mostly distributed in the south and northeast. ② the nugget coefficients of nitrogen and phosphorus fertilizer application intensities are 66.17% and 41.60%. Their spatial distribution is determined by structural and random factors, showing a moderate spatial autocorrelation. ③ both human and natural factors have significant effects on the application intensity of nitrogen and phosphorus fertilizer. The crop type (fine classification) can explain the spatial variation of nitrogen fertilizer and phosphorus fertilizer respectively by 12.90% and 25.10%, which is the main controlling factor affecting the spatial distribution of nitrogen and phosphorus application intensity; the importance of soil parent material is second only to the planting crop type, and the independent explanation ability of phosphorus application intensity is about 3.6 times higher than that of nitrogen application intensity. When the type of planting crop plays a decisive role, the soil parent material still deeply restricts and affects the spatial distribution of nitrogen and phosphorus fertilizer application intensity in the study area. Therefore, the comprehensive effects of planting crop types and soil parent materials should be considered in fertilization management and environmental risk analysis, and the effects of soil parent material should also be taken into account in the application of phosphate fertilizer.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Nitrogen fertilizers Controlled terms:Chemical analysis - Crops - Factor analysis - Geographical distribution - Phosphate fertilizers - Phosphorus - Pollution control - Risk analysis - Risk assessment - Soil surveys - Soils - Spatial variables measurement Uncontrolled terms:Distribution characteristics - Environmental risk analysis - Main controlling factors - Nitrogen and phosphorus - Phosphorus applications - Phosphorus fertilizer - Pollution prevention and controls - Spatial autocorrelations Classification code:405.3 Surveying - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention - 922 Statistical Methods - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements Numerical data indexing:Percentage 1.29e+01%, Percentage 2.51e+01%, Percentage 4.16e+01%, Percentage 6.62e+01% DOI:10.13227/j.hjkx.202007288 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582359 Title:Stabilization of Heavy Metals in Municipal Sludge Using a Slag-Based Modifying Agent Title of translation:矿渣基改性剂对城市污泥重金属稳定化 Authors:Zhang, Fa-Wen (1); Dong, Ming-Kun (1); Chen, Chen-Hui (1); Zhao, Chang-Min (2) Author affiliation:(1) College of Forestry, Henan Agricultural University, Zhengzhou; 450002, China; (2) Zhengzhou Ecological Environment Monitoring Center, Zhengzhou; 450007, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3430-3441 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Taking urban domestic sludge as the research object, a slag-based modifying agent was used to modify sludge under different dosages and curing times, and the solidification effect of six heavy metals in the sludge, namely Zn, Cr, Cu, Pb, As, and Cd, were evaluated by analyzing stability efficiency and morphological changes. The results showed that the stability efficiency improved as curing time and dosage increased, reaching the maximum when the curing time was 14 d and the dosage was 50%. Under these conditions, Cu reached the maximum of 69.62%, and the most rapid growth was observed when dosages were 5%-20%. Through the regression analysis of adding amount, maintenance time and stability efficiency, it was found that the fitting correlation coefficient Cu was the highest 0.97, with a strong degree of fitting and a strong interaction between adding amount and maintenance time, which had a significant influence on the stability efficiency. In addition, Pb and As were the residual state, Cu and Cr were oxidizable state and residue state, Zn and Cd were reducible and extractable state as the main forms in the sludge after modifying, respectively. With the increase of curing time or dosage, the residual state of each heavy metal increased by 7%-86%. The results showed that the slag-based modifying agent could effectively solidify heavy metals in sludge and reused solid wastes such as sludge.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Heavy metals Controlled terms:Curing - Efficiency - Slags - Stability Uncontrolled terms:Degree of fitting - Fitting correlations - Maintenance time - Modifying agents - Morphological changes - Municipal sludge - Solidification effect - Strong interaction Classification code:531 Metallurgy and Metallography - 802.2 Chemical Reactions - 913.1 Production Engineering Numerical data indexing:Percentage 5.00e+00% to 2.00e+01%, Percentage 5.00e+01%, Percentage 6.96e+01%, Percentage 7.00e+00% to 8.60e+01% DOI:10.13227/j.hjkx.202008202 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688849 Title:Distribution of Micro-plastics in the Soil Covered by Different Vegetation in Yellow River Delta Wetland Title of translation:不同植物覆盖下黄河三角洲湿地土壤中微塑料的分布 Authors:Yue, Jun-Jie (1); Zhao, Shuang (1); Cheng, Hao-Dong (1); Duan, Xin-Yue (1); Shi, Hong-Hua (2); Wang, Lei (3); Duan, Zheng-Hua (1, 3) Author affiliation:(1) School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin; 300384, China; (2) First Institute of Oceanography, Ministry of Natural Resources, Qingdao; 266061, China; (3) College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China Corresponding author:Duan, Zheng-Hua(duanzhenghua@mail.nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:204-210 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Micro-plastics (MPs) pollution has been a hotspot in soil environment. To explore the correlation of the vegetation cover and the distribution of MPs in Yellow River Delta wetland, the characters of MPs in the soil sampled at 16 sites where reed (Phragmites communis, a low-salt dominant species) and Suaeda salsa (a high-salt dominant species) covered were investigated. The abundance of MPs here ranged to 80-4 640 n•kg-1, and the particle size ranged to 13 μm-5 mm. The main components of MPs with large size were polyethylene (PE), polyethylene terephthalate (PET) and polystyrene (PS), and the content of PET ranged to 0.22-1.16 μg•kg-1. The barrier effect of reed on MPs was higher than that of Suaeda salsa. The average abundance of MPs and PET contents at the sites where reed covered were 1 423 n•kg-1 and 0.62 μg•kg-1, and they mainly consisted of small particles with a size less than 50 μm. The average abundance of MPs and PET contents at the site Suaeda salsa covered were 584 n•kg-1 and 0.33 μg•kg-1, and they mainly consisted of fragments and fibers with a size ranged to 100-1 000 μm. The abundance of MPs in the soil was significantly correlated with the growth statues of the vegetations (P=0.001). Therefore, the distribution of MPs in the soil in the same area covered by different vegetation might be spatial different.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Soils Controlled terms:Aliphatic compounds - Elastomers - Microplastic - Particle size - Plastic bottles - River pollution - Vegetation - Wetlands Uncontrolled terms:Barrier effects - Dominant species - Phragmites communis - Polyethylene terephthalates (PET) - Small particles - Soil environment - Vegetation cover - Yellow River delta Classification code:453 Water Pollution - 483.1 Soils and Soil Mechanics - 694.2 Packaging Materials - 818.2 Elastomers Numerical data indexing:Size 1.00e-04m to 1.00e-03m, Size 1.30e-05m to 5.00e-03m, Size 5.00e-05m DOI:10.13227/j.hjkx.202005030 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688803 Title:Effects of Vegetation Restoration on the Structure and Function of the Rhizosphere Soil Bacterial Community of Solanum rostratum Title of translation:植被恢复对刺萼龙葵根际土壤细菌群落结构与功能的影响 Authors:Zhang, Rui-Hai (1); Song, Zhen (1); Fu, Wei-Dong (1); Yun, Ling-Ling (1); Gao, Jin-Hui (1); Wang, Ran (1); Wang, Zhong-Hui (1); Zhang, Guo-Liang (1) Author affiliation:(1) Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing; 100081, China Corresponding author:Zhang, Guo-Liang(zhangguoliang@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:433-442 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Invasive plants can change soil microbial communities and therefore promote invasion. While vegetation restoration has been adopted in certain infested lands to curb the invasion of Solanum rostratum, changes in the composition and function of rhizosphere soil bacterial communities of the species before and after the restoration has not yet been reported. In this study, two vegetation combinations used in previous studies were selected as candidates: Astragalus adsurgens+Elymus dahuricus+Bromus inermis (T1) and A. adsurgens+Festuca arundinacea+Agropyron cristatum+Leymus chinensis (T2). Rhizosphere soil samples were collected from each combination (T1 and T2), a S. rostratum invaded area (SR), and the native plant (NP) control to analyze the bacterial community structure and diversity using 16S rDNA gene sequencing on the Illumina MiSeq platform. PICRUSt was further used to predict the functional abilities of soil bacterial communities. Results of 16S rDNA gene sequencing showed that both the Simpson and Chao1 indices were higher in the SR treatment than in the NP treatment, but neither reached a significant level, although both indices decreased significantly after vegetation restoration (T1 and T2; P<0.05). The relative abundance of Microvirga, Skermanella, and Sphingomonas from phylum Proteobacteria and Bryobacter from the phylum Acidobacteria were significantly lower in the SR treatment (P<0.05) when compared with the NP treatment and higher in restoration treatments (T1 and T2). The RDA analysis showed that soil organic matter (OM), total nitrogen (TN), total phosphorus (TP), total potassium (TK), and available potassium (AK) were important factors affecting the composition of the bacterial community. Based on the PICRUSt analysis of soil bacterial community functions, the relative abundance of gene families related to biosynthesis of amino acids, purine metabolism, pyrimidine metabolism, ribosome, and aminoacyl-tRNA biosynthesis were higher in the rhizosphere samples of the SR treatment than those of the NP treatment and reduced significantly after vegetation restoration (T1 and T2; P<0.05). The structure and function of rhizosphere soil bacterial community of S. rostratum and vegetation restoration were analyzed and provided a theoretical basis for the invasion mechanism and ecological restoration of S. rostratum.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Soils Controlled terms:Bacteria - Biochemistry - Biosynthesis - Genes - Metabolism - Potassium - Restoration - Vegetation Uncontrolled terms:16S rDNA gene sequencing - Bacterial community structure - Ecological restoration - Functional abilities - Restoration treatments - Soil bacterial community - Soil microbial community - Vegetation restoration Classification code:461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics - 549.1 Alkali Metals - 801.2 Biochemistry DOI:10.13227/j.hjkx.202006285 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688833 Title:Concurrent Collection of Ammonia Gas and Aerosol Ammonium in Urban Beijing During National Celebration Days Utilizing an Acid-Coated Honeycomb Denuder in Combination with a Filter System Title of translation:2019年国庆节前后北京气态氨和气溶胶铵盐浓度的同步观测 Authors:Gu, Meng-Na (1, 2); Pan, Yue-Peng (1, 2); Song, Lin-Lin (2, 3); Li, Ping (1, 2); Tian, Shi-Li (1); Wu, Yue-Yang (4); Yang, Ting-Ting (4); Li, Hao-Yang (4); Shi, Sheng-Wei (4); Tulinisha (5); Lü, Xue-Mei (1); Sun, Qian (1); Fang, Yun-Ting (3) Author affiliation:(1) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Stable Isotope Techniques and Applications, Liaoning Province, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang; 110016, China; (4) College of Bioscience and Resources Environment, Beijing University of Agriculture, Beijing; 102206, China; (5) Xinjiang Meteorological Observatory, Urumqi; 830002, China Corresponding authors:Pan, Yue-Peng(panyuepeng@mail.iap.ac.cn); Tian, Shi-Li(tianshili@mail.iap.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:1-8 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Since 2013, the Chinese government implemented the Air Pollution Prevention and Control Action Plan. As a result, the atmospheric concentrations of sulfate reduced significantly, whereas the nitrate concentrations remain relatively high due to the excess of ammonia (NH3). To date, there is no official observation network monitoring NH3 concentrations in China. Previous studies have focused on NH3 or ammonium (NH4+) separately. These limitations hinder a complete understanding of their dynamic changes due to the rapid gas-to-particle conversion. In this study, the concentrations of NH3 and NH4+ were measured concurrently in urban Beijing during autumn 2019 utilizing an acid-coated denuder-filter combination with a time resolution from 2 h (PM2.5>35 μg•m-3) to 5 h (PM2.5<35 μg•m-3). The mean concentrations of NH3 and NH4+ during the study were (4.1±2.9)μg•m-3 and (1.7±1.4) μg•m-3, respectively. The temporal patterns of NH3 or NH4+ coincided with that of PM2.5, CO, and NO2 throughout the sampling period. The diurnal distributions of NH3 were bimodal, both on polluted (PM2.5>75 μg•m-3) and non-polluted (PM2.5<75 μg•m-3) days, peaking at 21:30-05:30 and 05:30-08:30, respectively. The NH3 concentrations on polluted days were relatively lower during 17:30-21:30, which may be related to higher wind speeds. In contrast to NH3, NH4+had an obvious peak during 17:30-21:30 due to the formation of ammonium nitrate. The meteorological conditions favor the gas-to-particle conversion on polluted days, resulting in a lower NH3/NH4+ ratio of 0.8. However, this value may reach 2.8 on non-polluted days. The concentrations of NH3, CO, NO2, SO2, and PM2.5 in the emission control period showed a significant increase greater than or comparable to those in the non-control period by 54.2%, 40.4%, 33.3%, 0%, and 49.4%, respectively. This result shows that the stagnant conditions offset the benefit of emission control actions implemented during and before the National Celebration Day.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Ammonia Controlled terms:Emission control - Nitrates - Nitrogen oxides - Sulfur dioxide Uncontrolled terms:Air pollution prevention - Atmospheric concentration - Chinese Government - Diurnal distributions - Mean concentrations - Meteorological condition - Nitrate concentration - Observation networks Classification code:451.2 Air Pollution Control - 804.2 Inorganic Compounds Numerical data indexing:Percentage 0.00e+00%, Percentage 3.33e+01%, Percentage 4.04e+01%, Percentage 4.94e+01%, Percentage 5.42e+01% DOI:10.13227/j.hjkx.202005192 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003414 Title:Effects of Biochar and Straw on Soil N2O Emission from a Wheat Maize Rotation System Title of translation:对比研究生物炭和秸秆对麦玉轮作系统N2O排放的影响 Authors:Tang, Zhan-Ming (1); Liu, Xing-Ren (1); Zhang, Qing-Wen (1); Li, Gui-Chun (1) Author affiliation:(1) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China Corresponding authors:Liu, Xing-Ren(liuxingren@caas.cn); Li, Gui-Chun(liguichun@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1569-1580 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effects of biochar and straw return on soil N2O emissions were studied in the winter wheat-summer maize rotation system of intensively farmed land in North China to provide a theoretical basis for N2O emission reduction and the efficient straw utilization. The experiment included the following four treatments: ① Control (CK); ② Biochar application at a rate of 9.0 t•(hm2•a)-1 (C); ③ Straw return (SR); and ④ Straw return plus biochar application at a rate of 9.0 t•(hm2•a)-1 (C+SR). The results showed that in the wheat season, the CK treatment showed a slight decrease in soil N2O emission while the SR and C+SR treatments promoted soil N2O emission by 47.4% and 71.8%, respectively. In the maize-growing season, the CK treatment reduced soil N2O emission by 29.8% while the SR and C+SR treatments increased soil N2O emission by 13.4% and 35.8%, respectively. During the wheat-growing season, the soil water, NH4+-N, and MBN content were the main environmental factors affecting N2O emissions; during the maize-growing season, NO3--N, NH4+-N, and MBC content were the main environmental factors affecting emissions. Based on our results, the application of biochar to cropland is an effective option for mitigating greenhouse gas emissions, whereas direct straw return to fields might not be an effective strategy. More research is now needed to examine the effect of the return of straw of different maturity on N2O emissions.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Gas emissions Controlled terms:Emission control - Greenhouse gases - Soil moisture Uncontrolled terms:Emission reduction - Environmental factors - Growing season - Maize growing season - North China - Reduced soils - Summer maize - Winter wheat Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 483.1 Soils and Soil Mechanics Numerical data indexing:Percentage 1.34e+01%, Percentage 2.98e+01%, Percentage 3.58e+01%, Percentage 4.74e+01%, Percentage 7.18e+01% DOI:10.13227/j.hjkx.202008186 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688846 Title:Characteristics of Soil Nitrogen and Phosphorus Losses Under Different Land-use Schemes in the Shipanqiu Watershed Title of translation:石盘丘小流域不同土地利用方式下土壤氮磷流失形态及通量 Authors:Deng, Hua (1); Gao, Ming (1); Long, Yi (2); Li, Jia-Cheng (1); Wang, Yin-Yan (1); Wang, Zi-Fang (1) Author affiliation:(1) College of Resource and Environment, Southwest University, Chongqing; 400716, China; (2) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China Corresponding author:Wang, Zi-Fang(zifangw@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:251-262 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to understand the characteristics of soil nitrogen and phosphorus loss under different land use patterns in the small watershed of the Three Gorges Reservoir area and provide a scientific basis for the prevention and control of agricultural non-point source pollution, a field test method was used to study the paddy fields and drought in the small Shipanqiu Watershed in the Three Gorges Reservoir area. The characteristics of different runoff concentrations and the fluxes of nitrogen and phosphorus in surface runoff under the five land use schemes of paddy filed, slope land, woodlands, citrus orchards, and vegetable land. The results show that the annual total nitrogen loss followed the order of paddy field [17.73 kg•(hm2•a)-1]>citrus orchards [4.86 kg•(hm2•a)-1]>dry slope land [4.33 kg•(hm2•a)-1]>vegetable field [4.00 kg•(hm2•a)-1]>woodland [2.41 kg•(hm2•a)-1]. The annual total phosphorous loss followed the order of vegetable fields [4.97 kg•(hm2•a)-1]>Citrus orchards [1.87 kg•(hm2•a)-1]>paddy fields [0.93 kg•(hm2•a)-1]>woodlands [0.27 kg•(hm2•a)-1]>dry slope land [0.19 kg•(hm2•a)-1]. The nitrogen and phosphorus losses under the five land use methods were mainly concentrated from April to May with frequent rainfall events, accounting for 53.80%-96.52% and 56.03%-87.78% of the total annual nitrogen and phosphorus losses. Nitrogen loss was mainly in the form of nitrate nitrogen (16.16%-52.70%), and the total nitrogen loss flux and runoff showed a significant positive correlation (R2=0.982 6). Particulate phosphorus was the main form of phosphorus loss in vegetable fields (83.30%), but in other land use schemes it is not significant. There were significant differences in the loss of different forms of nitrogen and phosphorus under the different land use schemes. Among them, measures should be taken in vegetable fields to deal with the problem of particulate phosphorus loss under conditions of heavy rainfall. Fertilization should be avoided in paddy fields during periods of concentrated rainfall. Scientific fertilization and reasonable land use configurations are important ways to control agricultural non-point source pollution in small watersheds.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Agricultural runoff Controlled terms:Agricultural robots - Land use - Nitrogen - Orchards - Particles (particulate matter) - Phosphorus - Rain - Ships - Soil pollution control - Vegetables - Water pollution - Watersheds Uncontrolled terms:Agricultural non-point source pollutions - Concentrated rainfalls - Nitrogen and phosphorus - Nitrogen and phosphorus loss - Particulate phosphorus - Positive correlations - Prevention and controls - Three gorges reservoir area Classification code:403 Urban and Regional Planning and Development - 443.3 Precipitation - 444.1 Surface Water - 453 Water Pollution - 453.1 Water Pollution Sources - 454.2 Environmental Impact and Protection - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 951 Materials Science Numerical data indexing:Percentage 1.62e+01% to 5.27e+01%, Percentage 5.38e+01% to 9.65e+01%, Percentage 5.60e+01% to 8.78e+01%, Percentage 8.33e+01% DOI:10.13227/j.hjkx.201912075 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804549 Title:Effects of Precipitation Changes on Plant Community Diversity and Soil C:N:P Ecological Stoichiometric Characteristics in a Desert Steppe of China Title of translation:降雨变化对荒漠草原植物群落多样性与土壤C:N:P生态化学计量特征的影响 Authors:Gao, Jiang-Ping (1); Zhao, Rui-Feng (1); Zhang, Li-Hua (1); Wang, Jun-Feng (1); Xie, Zhong-Kui (2) Author affiliation:(1) College of Geography and Environment Science, Northwest Normal University, Lanzhou; 730070, China; (2) Gaolan Comprehensive Experimental Station of Ecology and Agriculture, Northwest Institute of Ecology and Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China Corresponding author:Zhao, Rui-Feng(zhaoruifeng@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:977-987 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Studying the influence of precipitation patterns on plant community diversity, soil C:N:P ecological stoichiometric characteristics, and the relationships between key soil factors and plant community diversity is of great significance for the protection of plant community diversity in desert grasslands. This paper was studied in the desert steppe of the west of Loess Plateau using a three-year precipitation manipulation experiment (40% reduction in precipitation, 20% reduction in precipitation, natural precipitation, 20% increase in precipitation, and 40% increase in precipitation), explored the influence of changes in precipitation in dry and wet years on the diversity of plant community and soil C:N:P ecological stoichiometric characteristics. And we also explored the relationship between soil C:N:P ecological stoichiometric characteristics and the key soil factors and the diversity of plant community under changes in precipitation. The results showed that in a normal year and the drier year (2013 and 2015), Patrick richness and Shannon-Wiener diversity index were significantly low under the 20% reduction treatment compared with the control and 40% increase treatments, respectively. During the wetter year, Patrick richness and Shannon-Wiener diversity index were no different between any of the precipitation treatments. In the normal year and the drier year, the soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) contents and the carbon-nitrogen ratio (C:N), carbon-phosphorus ratio (C:P), and nitrogen-phosphorus ratio (N:P) all decreased with an increase in precipitation (the decrease in the C:N ratio was statistically significant). During the wetter year, SOC, TN, C:P, and N:P increased with an increase in precipitation. During the normal year, precipitation treatments had no significant influence on soil water content, having a limited influence on the plant community. TN, N:P, SOC, C:N, and microbial biomass nitrogen (MBN) had a more prominent influence on plant community diversity. In the wetter year, precipitation was abundant leading to a rise in soil nutrients. Water was not the most important factor limiting to plant growth whereas soil water content, soil nutrients, and ecological stoichiometric characteristics jointly regulate plant community diversity. In the drier years, precipitation treatments had a significant impact on soil water content, whereby an increase in precipitation led to high losses of soil nutrients. Therefore, soil water content was the most important factor affecting plant community diversity during drier years. These observations indicate that under dry and wet years, plant community diversity and soil C:N:P ecological stoichiometric characteristics have variable responses to precipitation and soil C:N:P effect on plant community were also different. These results provide a theoretical basis for the protection and management of desert steppe systems under future projected changes in precipitation.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Ecology Controlled terms:Driers (materials) - Landforms - Nitrogen - Nutrients - Organic carbon - Phosphorus - Soil moisture Uncontrolled terms:Carbon-nitrogen ratio - Nitrogen phosphorus - Precipitation change - Precipitation patterns - Protection and management - Shannon-wiener diversity indices - Soil organic carbon - Soil water content Classification code:454.3 Ecology and Ecosystems - 481.1 Geology - 483.1 Soils and Soil Mechanics - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 2.00e+01%, Percentage 4.00e+01% DOI:10.13227/j.hjkx.202007041 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404415 Title:Hydrochemistry and Its Controlling Factors and Water Quality Assessment of Shallow Groundwater in the Weihe and Jinghe River Catchments Title of translation:渭河和泾河流域浅层地下水水化学特征和控制因素 Authors:Liu, Xin (1); Xiang, Wei (1); Si, Bing-Cheng (1, 2) Author affiliation:(1) Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling; 712100, China; (2) Department of Soil Science, University of Saskatoon, SK; S7N 5A8, Canada Corresponding author:Xiang, Wei(xiangwei2016@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2817-2825 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The Weihe and Jinghe Rivers catchments are important tributaries of the Yellow River, where it is of great significance to evaluate groundwater hydrochemistry and quality for ecological protection and sustainable development. Piper diagrams, Gibbs, Na-normalized molar ratios, and ion correlation methods were used to analyze the chemical composition of groundwater in these two catchments. Furthermore, the WQI method, Wilcox diagrams, USSL diagrams, and Doneen diagrams were used to evaluate the suitability of groundwater quality for drinking and irrigation. The results showed that the Weihe and Jinghe River catchments are dominated by fresh and weakly alkaline water. Groundwater ion concentration in the Weihe River are higher than in Jinghe River except for Na+, and the major groundwater types are HCO3-Ca-Mg(accounted for 50%), and HCO3-Ca-Mg and HCO3-Na-K (accounted for 32.5%), respectively. The hydrochemistry of the Weihe and Jinghe River catchments is mainly controlled by rock weathering, primarily silicate weathering. Moreover, the groundwater chemistry in the research area is affected by mining and chemical fertilizer application for agriculture. Furthermore, the hydrochemistry of the Weihe River catchment is affected by cation exchange, although this was not obvious in some regions of the Jinghe River catchment. The overall groundwater quality of the two catchments was good, with the Jinghe River water quality being better than in the Weihe River catchment. Based on SSP, SAR, and PI, the groundwater in some parts of the study area cannot be directly used for irrigation as this would result in salinization and, thus, inhibit plant growth. Overall, the groundwater quality in the south of the study area is better than in the north, and is better in the Jinghe River catchment than in the Weihe River catchment according to these three indicators. This study provides a basis for the sustainable development of two catchments, providing baseline data for groundwater quality management.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Hydrochemistry Controlled terms:Agricultural robots - Alkalinity - Catchments - Chemical analysis - Correlation methods - Fertilizers - Graphic methods - Groundwater - Groundwater geochemistry - Irrigation - Molar ratio - Planning - Quality control - Quality management - Rivers - Runoff - Silicates - Sustainable development - Water quality - Weathering Uncontrolled terms:Chemical compositions - Chemical fertilizers - Controlling factors - Drinking and irrigations - Ecological protection - Groundwater chemistry - Silicate weathering - Water quality assessments Classification code:444.1 Surface Water - 444.2 Groundwater - 445.2 Water Analysis - 481.2 Geochemistry - 801.1 Chemistry, General - 804 Chemical Products Generally - 821.3 Agricultural Methods - 912.2 Management - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics Numerical data indexing:Percentage 3.25e+01%, Percentage 5.00e+01% DOI:10.13227/j.hjkx.202011068 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582254 Title:Contamination Characteristics of Surface Runoff in Densely Populated Areas in Downstream Yangtze River, China Title of translation:长江下游居民区降水地表径流的污染特征 Authors:Guo, Wen-Jing (1, 2); Zhang, Zhi-Yong (1, 2); Wen, Xue-Zheng (1, 2); Zhang, Han-Wen (1, 2); Wang, Yan (1, 2) Author affiliation:(1) Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing; 210014, China; (2) Key Laboratory of Agro-Environment in Downstream of Yangze Plain, Ministry of Agriculture and Rural Affairs, Nanjing; 210014, China Corresponding author:Zhang, Zhi-Yong(jaaszyzhang@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3304-3315 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Urban surface runoff is an important non-point pollution source, and research on contamination characteristics of runoff is urgent for improving urban aquatic environment quality. Typical cities along the downstream Yangtze River, Wuxi and Nanjing, were selected in this study, and runoff samples from various underlying surfaces were collected to investigate contamination characteristics of heavy metals and dissolved organic matter (DOM). The results indicated that the concentration of heavy metals have exceed water quality standards in underlying surfaces partly, the decreasing order of metal contaminations was Zn>Cu>Pb>Sb>Cd. Contamination characteristics of surface runoff were found to exhibit significant differences, and arterial traffic exhibited the severe contamination of both heavy metals and DOM. Spectral characteristics indicated that the structure of DOM exhibited significant differences in various underlying surfaces, and DOM humification levels in Wuxi showed the following decreasing order: roof covering>sidewalk>parking area>grassy area>arterial traffic, aromaticity indexes exhibited order as: arterial traffic>grassy area>sidewalk>roof covering>parking area. Differential absorption spectroscopy (DAS) and FT-IR analyses indicated that DOM exhibited strong combination effects with cationic metal pollutants (Cu), which mainly occur with C〖FY=,1〗C structure and carboxylic and phenolic groups; DOM presented weak combination with anion metal pollutant (Sb), indicating that Sb likely exists as a free anion in runoff. The annual total loadings of metal contaminations in the study area were as follows: Zn>Cu>Pb>Sb>Cd. The loadings of Zn were 4.83 kg•a-1 and 3.21 kg•a-1 in Wuxi and Nanjing, respectively. Annual loadings of DOM reached 0.93 g•(m2•a)-1 and 8.72 g•(m2•a)-1. The results indicated that corresponding pollution reduction measures should be implemented for different underlying surfaces to reduce contaminant concentrations; our findings may provide essential information for improving the aquatic environment quality in downstream Yangtze River.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:River pollution Controlled terms:Absorption spectroscopy - Contamination - Copper metallography - Heavy metals - Pavements - Rivers - Roof coverings - Runoff - Water quality Uncontrolled terms:Aquatic environments - Combination effects - Contaminant concentrations - Differential absorption spectroscopy - Dissolved organic matters - Spectral characteristics - Water quality standard - Yangtze river , China Classification code:402 Buildings and Towers - 442.1 Flood Control - 445.2 Water Analysis - 453 Water Pollution - 531 Metallurgy and Metallography - 531.2 Metallography DOI:10.13227/j.hjkx.202012144 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804547 Title:Health Impact Attributable to the Control of PM2.5 Pollution in China During 2013-2017 Title of translation:2013~2017年中国PM2.5污染防治的健康效益评估 Authors:Zhang, Meng-Jiao (1, 2); Su, Fang-Cheng (1, 2); Xu, Qi-Xiang (2, 3); Zhang, Rui-Qin (2, 3); Wei, Yu (1, 2); Xie, Liu-Zhen (1, 2) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Research Institute of Environmental Science, Zhengzhou University, Zhengzhou; 450001, China; (3) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Xu, Qi-Xiang(xuqixiang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:513-522 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To evaluate the health benefits brought about by air environmental treatment and determine the main drivers of health risk, we calculated the health and economic benefits attributed to PM2.5 control in Eastern and Central China from 2013 to 2017 by combining PM2.5 concentrations with a human activity enhanced exposure-response model. The relative contributions of changes in four factors related to the PM2.5 health burden were also quantified, namely total population, population aging, baseline mortality rates, and ambient exposure. The results show that the population weighted PM2.5 concentration decreased by 28.73% and the proportion of the population exposed to annual PM2.5 concentrations lower than or equal to 35 μg•m-3 increased from 11.23% to 27.91% across the study area during this period. Avoided deaths were decreased to 14.43%, which equates to avoided economic losses of approximately 559 billion RMB. If PM2.5 concentration meets the Chinese Ambient Air Quality Standard Grade Ⅱ (35 μg•m-3) or Grade Ⅰ (15 μg•m-3), or the World Health Organization Air Quality Guidelines (AQG) standards (10 μg•m-3), a 8.22%, 55.05%, and 79.36% reduction in the total deaths could be achieved in the base year (2017) with equivalent total economic benefits of approximately 319, 2 137, and 3 081 billion RMB, respectively. Total population, population aging, baseline mortality rates, and PM2.5 concentrations contributed -2.69%, -12.38%, 1.66%, and 14.57% to PM2.5-related deaths. Overall, during the study period, the reduction in PM2.5 concentrations has been the main factor contributing to the reduction in the public health burden. China has implemented significant air pollution control measures; however, the health burden associated with high PM2.5 concentrations in densely populated areas is still extremely high, requiring an aggressive air pollution control strategy.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Air pollution control Controlled terms:Air quality - Air quality standards - Economic and social effects - Health - Health risks - Losses - Population statistics Uncontrolled terms:Ambient air quality standards - Economic benefits - Environmental treatment - PM2.5 concentration - Pm2.5 pollutions - Quality guidelines - Relative contribution - World Health Organization Classification code:451.2 Air Pollution Control - 461.6 Medicine and Pharmacology - 461.7 Health Care - 902.2 Codes and Standards - 911.2 Industrial Economics - 971 Social Sciences Numerical data indexing:Percentage -1.24e+01%, Percentage -2.69e+00%, Percentage 1.12e+01% to 2.79e+01%, Percentage 1.44e+01%, Percentage 1.66e+00%, Percentage 2.87e+01%, Percentage 5.50e+01%, Percentage 7.94e+01%, Percentage 8.22e+00% DOI:10.13227/j.hjkx.202007012 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804529 Title:Removal of Antibiotics and Antibiotic Resistance Genes from Urban Rivers Using Artificial Ecosystems Title of translation:人工生态系统对城市河流中抗生素和ARGs的去除 Authors:Zhou, Hai-Dong (1); Huang, Li-Ping (1); Chen, Xiao-Meng (1); Li, Dan-Yan (1); Li, Xin (1); Cui, Jin-Yu (1) Author affiliation:(1) School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai; 200093, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:850-859 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Four antibiotics [azithromycin (AZM), sulfamethoxazole (SMZ), ciprofloxacin (CIP), and tetracycline (TCY)], and the antibiotic resistance genes (ARGs) [sulfonamides (sul1 and sul2), tetracyclines (tetX and tetM), quinolones (qnrS and qnrD), macrolides (ermB), and 16S rDNA] were selected as target compounds. Artificial ecosystems were constructed with combinations of two emergent plants and Microcystis aeruginosa (Acorus calamus+Cordyceps, algae+Cordyceps, algae+Acorus calamus, and algae+Acorus calamus+Cordyceps) in an indoor-simulated river system. Throughout the artificial ecosystems, changes in antibiotic concentrations and other pollution indicators (i.e., COD, NH4+-N, TP, and TN) were monitored in different media (the aqueous phase, sediment phase, and in plants), and the distribution and removal of ARGs in aqueous and sediment phases were explored. Removal of the target compounds was calculated based on mass balance, and the correlation between ARG abundance and environmental factors in the aqueous and sediment phases was analyzed. The results showed that the constructed artificial ecosystem achieved removal rates of COD, NH4+-N, TP, and TN ranging from 60.2% to 74.8%, 63.4% to 77.4%, 64.0% to 73.2%, and 46.8% to 54.8%, respectively. The antibiotics in the aqueous phase were notably removed and the artificial ecosystem 'algae+Acorus calamus+Cordyceps' achieved the best removal efficiency for the four antibiotics. Removal rates of the antibiotics in the sediment phase were ranked in the order TCY>CIP>AZM>SMZ; the removal efficiency of TCY in the 'algae+Acorus calamus+Cordyceps' system reached up to 53.5%. The total removal rates of antibiotics obtained by the ecosystems were ranked in the following order: algae+Acorus calamus+Cordyceps>algae+Cordyceps>algae+Acorus calamus>Acorus calamus+Cordyceps. Removal of the four ARGs was very efficient and was higher in the aqueous phase than in the sediment phase. Correlations between the ARGs, the other pollution indicators, and the antibiotics were variable; tetX and environmental factors were correlated in the aqueous phase, while AZM and its corresponding ARGs were not significantly correlated in the sediment phase. The results showed that ARGs can be targeted under corresponding antibiotic pressure and other types of environmental pressure. In the study system, the concentrations of antibiotics did not directly affect the transmission of ARGs. Overall, this study shows that artificial ecosystems constructed with emergent plants and Microcystis aeruginosa can be effective at purifying water and reducing the environmental risks of antibiotics in urban rivers.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Antibiotics Controlled terms:Algae - Amides - Bacteria - Ecosystems - Efficiency - Genes - River pollution - Rivers - Sediments - Sulfur compounds Uncontrolled terms:Antibiotic concentration - Antibiotic resistance genes - Artificial ecosystems - Environmental factors - Environmental pressures - Microcystis aeruginosa - Pollution indicators - Removal efficiencies Classification code:453 Water Pollution - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 483 Soil Mechanics and Foundations - 804.1 Organic Compounds - 913.1 Production Engineering Numerical data indexing:Percentage 4.68e+01% to 5.48e+01%, Percentage 5.35e+01%, Percentage 6.02e+01% to 7.48e+01% DOI:10.13227/j.hjkx.202007048 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003355 Title:Characterization and Health Risks of PCDD/Fs, PCBs, and PCNs in the Soil Around a Typical Secondary Copper Smelter Title of translation:典型再生铜冶炼厂周边土壤中PCDD/Fs, PCBs和PCNs的污染特征及健康风险评估 Authors:Hu, Ji-Cheng (1, 2); Wu, Jing (1); C.-Y., Xu; J., Jin Author affiliation:(1) College of Life and Environmental Science, Minzu University of China, Beijing; 100081, China; (2) Beijing Engineering Research Center of Food Environment and Public Health, Beijing; 100081, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1141-1151 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The concentrations of PCDD/Fs, PCBs, and PCNs in the soil samples around a typical secondary copper smelter were determined simultaneously, and then the impact of the smelter on the surrounding environment and the health risks of workers in the study area were analyzed and evaluated. PCDD/F, PCB, and PCN concentrations were in the range of 17.2-370, 1.20-14.2, and 70.9-950 pg•g-1 in the soil around the smelter, respectively. High concentrations of PCDD/Fs and PCNs were observed at the sample sites close to the secondary copper smelter (<300 m), and their concentrations exponentially decreased with an increase in distance from the smelter. The results of the source analysis showed that the secondary copper smelter had a significant impact on the PCDD/Fs and PCNs content and congener profiles of the soil within 300 m of its surroundings. In addition, the PCDD/Fs pollution in the surrounding soil may also have been affected by the historical use of pentachlorophenol or sodium pentachlorophenol in addition to the secondary copper smelter. The health risk assessment results showed that the non-carcinogenic and carcinogenic risks of workers exposed to PCDD/Fs, PCBs, and PCNs in the surrounding soil were within acceptable levels, and that oral ingestion was the main exposure route. Although the health risk assessment only considered the exposure of workers to these pollutants in an outdoor environment during working hours, the carcinogenic risk values of the two soil samples had reached 0.47×10-6 and 0.15×10-6 (threshold value 10-6), so they should attract our attention. PCDD/Fs had the highest contribution rate (96%) to the total carcinogenic risk (PCDD/Fs+PCBs+PCNs), and they were the dioxins that need to be the primary concern and control in the study area.
© 2021, Science Press. All right reserved. Number of references:47 Main heading:Soil pollution Controlled terms:Health - Health risks - Herbicides - Occupational risks - Organic pollutants - Phenols - Polychlorinated biphenyls - Risk assessment - Smelting - Soil surveys - Soils Uncontrolled terms:Carcinogenic risk - Congener profiles - Contribution rate - Outdoor environment - Sodium pentachlorophenol - Surrounding environment - Surrounding soils - Threshold-value Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 533.2 Metal Refining - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 9.60e+01%, Size 3.00e+02m DOI:10.13227/j.hjkx.202009052 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779693 Title:Seasonal Variation, Source Identification, and Health Risk of PM2.5-bound Metals in Xinxiang Title of translation:新乡市大气PM2.5载带金属元素季节分布, 来源特征与健康风险 Authors:Liu, Huan-Jia (1); Jia, Meng-Ke (1); Liu, Yong-Li (1); Zhao, Yi-Jie (1); Zheng, Ai-Hua (2); Liu, Heng-Zhi (1); Xu, Su-Yang (1); Xiao, Qing-Qing (1); Su, Xiao-Yan (1); Ren, Yan (1) Author affiliation:(1) Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China; (2) Analysis and Testing Center, Beijing Normal University, Beijing; 100875, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4140-4150 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study analyzed the seasonal variation, sources, and source-specific health risks of PM2.5-bound metals in Xinxiang city, Henan province. A total of 112 daily PM2.5 samples were collected over four consecutive seasons during 2019-2020. In total, 19 elements were identified using inductively coupled plasma atomic emission spectroscopy (ICP-AES). The annual concentrations of PM2.5 and 11 heavy metals were calculated to be (66.25±35.73) μg•m-3 and (1.32±0.84) μg•m-3, respectively. Strong seasonal variations were observed in PM2.5 concentrations and the concentrations of associated metal elements, with the lowest concentrations all occurring in summer. The highest concentrations of dust-related elements (e.g., Al, Ca, Fe, Mg, and Ti) were recorded in spring, differing significantly from other elements, which all exhibited the highest mass concentrations in winter. The results apportioned from positive matrix factorization (PMF) and potential source contribution function (PSCF) models showed that the major sources of PM2.5-bound elements were Ni-and Co-related emissions (5.8%), motor vehicles (13.7%), Cd-related emissions(5.1%), combustion emissions (18.2%), and dust (57.3%). Health risk models showed that there were no obvious non-carcinogenic risks associated with these metals, because their hazard quotient (HQ) values were all below 1. Lifetime carcinogenic risks of the five apportioned sources were all higher than the acceptable level (1×10-6). Of these five sources, combustion emissions were the largest contributors to cancer risk (8.74×10-6, 36.9%) and non-cancer risk (0.60, 25.6%). This study suggests that control strategies to mitigate exposure risk in Xinxiang should emphasize reducing the sources of combustion emissions.
© 2021, Science Press. All right reserved. Number of references:77 Main heading:Health risks Controlled terms:Atomic emission spectroscopy - Combustion - Diseases - Dust - Factorization - Heavy metals - Inductively coupled plasma - Risk assessment Uncontrolled terms:Combustion emissions - Inductively coupled plasma atomic emission spectroscopy - Mass concentration - PM2.5 concentration - Positive Matrix Factorization - Potential source contribution function models - Seasonal variation - Source identification Classification code:451.1 Air Pollution Sources - 461.7 Health Care - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics - 932.3 Plasma Physics Numerical data indexing:Percentage 1.37e+01%, Percentage 1.82e+01%, Percentage 2.56e+01%, Percentage 3.69e+01%, Percentage 5.10e+00%, Percentage 5.73e+01%, Percentage 5.80e+00% DOI:10.13227/j.hjkx.202102032 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582346 Title:Effects of Water Supply Quality and Social Activity on the Microbial Community in Baiyangdian Wetland Title of translation:补给水质与社会活动对白洋淀湿地微生物的影响特征 Authors:Zhao, Zhi-Rui (1); Wu, Hui-Qing (2); Y.-F., Bi; Q.-Z., Zhan; H.-M., Wu; K.-N., Yuan; X.-Y., Meng; F.-H., Li Author affiliation:(1) College of Water Resources and Environment, Hebei Geo University, Hebei Ecological and Environmental Geology Research Center, Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure, Shijiazhuang; 050031, China; (2) Evaluation and Calculation Center of Hebei Provincial Department of Finance, Shijiazhuang; 050050, China; (3) Shijiazhuang Affordable Housing Management Center, Shijiazhuang; 050003, China; (4) Agriculture and Rural Bureau of Chang'an District, Shijiazhuang; 050016, China Corresponding author:Li, Fang-Hong(lifanghong9662@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3272-3280 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To clarify the impact of water quality and social activity in the Baiyangdian wetland on the biological community, the change characteristics of bacterial, fungal, and archaeal communities in different areas of the Dian District were studied. Samples were collected at the entrance of Fuhe District (NBB), tourist areas with frequent human social activities (NBD), residential breeding areas (NBX), and village sparse areas (NBN). The physical and chemical characteristics and biological communities of the samples were evaluated. The results of the study show that the COD concentration of organic pollutants in the NBB was 12.35 mg•L-1, and the total nitrogen concentration was 10.12 mg•L-1, that the concentration was highest. Moreover, the water quality in NBD and NBX was better than that of NBB. The NBN area exhibited the best water quality, with COD and total nitrogen concentration values of 6.9 mg•L-1 and 1.82 mg•L-1, respectively. Many types of NBB bacteria were recorded, with a diversity index of 5.86, and NBN diversity index exceeding 4.78. The dominant bacterial flora in all samples was the Proteobacteria, which accounts for 68.8% of the total bacterial communities in NBN samples. The diversity index of fungi in NBB was only 2.14. There were many types of fungi in NBN, with a diversity index of 3.23. Chytridiomycota was found in the NBD and NBN, accounting for 5.4% and 9.8% of the total number of fungi, respectively. The Chytridiomycota was main decomposer of hard to degrade organic carbon. The diversity of archaea of NBN was the lowest among all the samples. Crenarchaeota was the dominant phylum, which accounts for 39.0%, 51.9%, 47.3%, and 30.1% of NBB, NBD, NBX, and NBN samples, respectively. The number of Halobacterota was lower than Crenarchaeota. The main factor of eutrophication and microbial community changes in Baiyangdian wetland was the results of the combined action of external and internal pollution. Both external and internal pollution increased the organic matter, nitrogen and phosphorus content in the water, and the microbial community structure has changed significantly. The contents of organic matter, nitrogen, and phosphorus in water were increased and the microbial community structures were changed significantly by the increase of both external and internal pollution.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Water pollution Controlled terms:Bacteria - Biogeochemistry - Eutrophication - Fungi - Nitrogen - Organic carbon - Organic pollutants - Phosphorus - Water quality - Water supply - Wetlands Uncontrolled terms:Baiyangdian wetlands - Biological community - Microbial communities - Microbial community structures - Nitrogen and phosphorus - Physical and chemical characteristics - Social activities - Total bacterial communities Classification code:445.2 Water Analysis - 446.1 Water Supply Systems - 453 Water Pollution - 481.2 Geochemistry - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.01e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 1.23e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 1.82e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 6.90e-03kg/m3 to 2.20e-02kg/m3, Percentage 3.01e+01%, Percentage 3.90e+01%, Percentage 4.73e+01%, Percentage 5.19e+01%, Percentage 5.40e+00%, Percentage 6.88e+01%, Percentage 9.80e+00% DOI:10.13227/j.hjkx.202010265 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582252 Title:Two-Stage Denitrification Process Performance with Solid Slow-Release Carbon Source Title of translation:外加固体缓释碳源的两段反硝化工艺脱氮性能 Authors:Tang, Yi (1); Ma, Yong-Wen (1, 2); Wan, Jin-Quan (1, 2); Wang, Yan (1, 2); Ye, Gang (1) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Guangdong Engineering and Technology Research Center of Plant Fiber High-value Cleaning and Utilization, Guangzhou; 510641, China Corresponding author:Ma, Yong-Wen(ppywma@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3392-3399 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
During wastewater treatment using a traditional biological denitrification process, the excessive concentration of nitrate nitrogen (NO3--N) in the effluent is the primary cause of excessive total nitrogen (TN) generation. By using an external carbon source to increase the carbon to nitrogen ratio (C/N), the denitrification process can be strengthened, which effectively addresses this problem. Using an integrated denitrification reactor developed based on the two-stage denitrification process principle with the addition of polybutylene succinate (PBS) in the second stage, the denitrification process was analyzed using a scanning electron microscope before and after characterization of PBS materials. Moreover, amplicon sequencing was used for in-depth exploration of changes in the microbial community structure in the second denitrification pool before and after the addition of PBS. The data of a continuous 120-day experiment showed that the COD removal rate dropped from 95.7% to 90.8%, the TN removal rate increased from 51.8% to 80%, the relative abundance of Proteobacteria phylum rose from 36.1% to 46.1%, and the relative abundance of Thermomonas rose from 6.47% to 13.48%. The results show that after the addition of PBS, PBS can not only provide carbon source for denitrification, but its surface can also serve as a carrier for microbial growth and attachment, play a good role in filming, and increase the abundance of denitrifying bacteria and strengthen denitrification. During the nitrification process, denitrification performance was significantly enhanced, effectively improving the TN removal rate of the system.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Denitrification Controlled terms:Bacteria - Biological water treatment - Carbon - Effluent treatment - Effluents - Nitrification - Nitrogen - Nitrogen removal - Scanning electron microscopy - Wastewater treatment Uncontrolled terms:Biological denitrification - Carbon-to-nitrogen ratio - Denitrification process - Denitrification reactors - Denitrifying bacteria - Microbial community structures - Nitrification process - Polybutylene succinate Classification code:445.1 Water Treatment Techniques - 452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Age 3.29e-01yr, Percentage 3.61e+01% to 4.61e+01%, Percentage 5.18e+01% to 8.00e+01%, Percentage 6.47e+00% to 1.35e+01%, Percentage 9.57e+01% to 9.08e+01% DOI:10.13227/j.hjkx.202010194 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582295 Title:Spatial Distribution Trends and Influencing Factors of Typical Heavy Metals in Subtropical Alpine Forest Soils: A Case Study from Ailao Mountain in Yunnan Province Title of translation:亚热带高山森林土壤典型重金属的空间分布格局及其影响因素:以云南哀牢山为例 Authors:Liu, Xu (1); Wang, Xun (1); Wang, Ding-Yong (1, 2) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China Corresponding author:Wang, Ding-Yong(dywang@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3507-3517 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, we hypothesized that the distribution patterns of trace metal elements in montane regions would be controlled by the local climate, human activities, vegetation distribution and soil development. Hence, we selected nine forest sites among the elevation of 850 m to 2 650 m on the windward (western slope) and leeward (eastern slope) slopes of Ailao Mountain in Yunnan Province of China to determine the typical heavy metal concentrations in forest surface soils, and their differences for distribution trends along with the increasing elevations, and the corresponding environmental factors. The results showed that surface soil Cd, Sb, As, Cr, and Pb had relatively higher concentrations and distinct enrichment factors both on eastern and western slopes. Specifically, the concentrations of Cd and Sb in surface soils of the eastern and western slopes and Pb on the western slope all had obvious altitude distribution trends, which showed their concentrations increased with the increasing elevation. In addition, we found the concentrations of Cd, Sb, As, and Cr in surface soils of the western slope were significantly higher than those of the eastern slope at the same altitude. The correlation analysis and principal component analysis further depicted that the elevation trends of Cd and Sb were mainly controlled by the strong combining effects from long-range atmospheric input and soil organic matter strong absorption, and there was an obvious "cold trapping" effect in high altitude areas. The distribution variations of As and Cr were mainly derived from the weathering difference of soil parent material, while the variations for Pb were controlled by the weathering of bedrock minerals. This study highlights the important role of combining effects from long-range atmospheric input, and from precipitation and vegetation (such as "cold trapping" effect, promoting canopy filtration, litterfall deposition and bedrock weathering) on the distribution trends of trace metals in remote alpine soils.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Pollution Controlled terms:Filtration - Forestry - Heavy metals - Soils - Trace elements - Tropics - Vegetation - Weathering Uncontrolled terms:Altitude distributions - Correlation analysis - Distribution patterns - Environmental factors - Heavy metal concentration - Soil organic matters - Trace metal element - Vegetation distribution Classification code:443 Meteorology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 802.3 Chemical Operations Numerical data indexing:Size 8.50e+02m2 to 2.65e+03m2 DOI:10.13227/j.hjkx.202012029 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779692 Title:Exploring Characteristics and Causes of Summer Ozone Pollution Based on Process Analysis in Wuhai Title of translation:乌海市夏季臭氧污染特征及基于过程分析的成因探究 Authors:Zhang, Rui-Xin (1); Chen, Qiang (1); Xia, Jia-Qi (1); Liu, Xiao (1); Guo, Wen-Kai (1); Li, Guang-Yao (1); Chen, Mei (2) Author affiliation:(1) Key Laboratory of Semi-Arid Climate Change, Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou; 730000, China; (2) School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China Corresponding author:Chen, Qiang(chenqqh@lzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4180-4190 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In recent years, summer O3 pollution has become more severe in Wuhai, where the terrain is complex and industrial parks are densely distributed. However, the characteristics and formation mechanisms of this pollution have not yet been investigated and remain unclear. Analyzing the variation and formation mechanisms of O3 is crucial to the prevention and control of air pollution in this region. By analyzing characteristics and using a WRF-CMAQ model to simulate three O3 pollution periods in Wuhai from June to August 2018, this study explored the causes of O3 pollution based on in-depth process analysis, and the effects of regional transportation and local photochemical reaction on O3 were also discussed. The diurnal variation of ozone exhibited a single-peak distribution, and near-surface O3 was positively correlated with short-wave radiation and temperature, and negatively correlated with relative humidity. The areas of Shizuishan in Ningxia and the Ulanbuhe desert exhibited high O3 values during the day, while the three industrial parks in Wuhai exhibited low values during both the day and night. Process analysis showed that transportation, chemical processes, and their relative magnitudes had a significant impact on O3. Local photochemical reactions and transport during the pollution period in June and July led to an obvious increase in O3, while the impact of chemical processes was about twice as large as that of transport. The increase of O3 in August was mainly caused by transport. Further decomposition of the transportation effect showed that transportation in the south and northwest directions had a remarkable effects on the increase of O3. Together with the emission of O3 precursors, the main sources of transportation were the Yinchuan, Shizuishan, and Bayannaoer regions. Therefore, Wuhai and neighboring cities should strengthen regional joint prevention and control by jointly formulating and implementing control measures for air pollution to reduce the impact of regional transmission on O3.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Air pollution Controlled terms:Air pollution control - Chemical analysis - Ozone - Photochemical reactions Uncontrolled terms:Chemical process - Control measures - Diurnal variation - Formation mechanism - Prevention and controls - Process analysis - Regional transportation - Short-wave radiation Classification code:451 Air Pollution - 451.2 Air Pollution Control - 741.1 Light/Optics - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202101094 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779801 Title:Structure of Aerobic Denitrification Bacterial Community in Response to Dissolved Organic Matter in Baiyangdian Lake During the Water Delivery Period Title of translation:输水情景下白洋淀好氧反硝化菌群落对溶解性有机物的响应 Authors:Zhou, Shi-Lei (1); Zhang, Tian-Na (1); Chen, Zhao-Ying (1); Zhang, Zi-Wei (1); Yu, Ming-Hui (1); Yao, Bo (1); Cui, Jian-Sheng (1); Luo, Xiao (1) Author affiliation:(1) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4319-4331 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Dissolved organic matter (DOM) plays an important role in the evolution of microbial communities. Meanwhile, ecological water delivery is an important feature of Baiyangdian Lake. To explore how the structure of the aerobic denitrification bacteria community responds to DOM during the water delivery period, the DOM components of water were examined and high-throughput sequencing of aerobic denitrification bacteria was performed. The results showed significant differences in DOM concentration in Baiyangdian Lake, with the estuary area exhibiting lower DOM concentrations. The water exhibited strong autogenous source, while DOM in the estuary area had a higher molecular weight and degree of humification. Three protein-like substances (C1, C2, and C4) and one humic-like substance (C3) were identified through PARAFAC. The protein-like substances accounted for the major proportion of DOM, which was consistent with the results of fluorescence regional integration (FRI). The genera of the water body were mainly in the Protebacterice phylum, including Cupriavidus, Aeromonas, Thauera, Shewanella, and Pseudomonas. Meanwhile, Cupriavidus, Thauera, Shewanella, Agrobacterium, and Pseudomonas were the main indicator species, according to random forest (RF) analysis. Through network analysis, 35 key nodes of the network were obtained, belonging to Thauera, Cupriavidus, and Unclassified_bacteria, respectively. Redundancy analysis (RDA) showed that a humic-like substance was the main environmental factor regulating the whole structure of the aerobic denitrification bacterial community, while protein-like substances played important roles in changes to the indicator species and key nodes of the community. Overall, protein-like substances could provide an important reference for selecting carbon sources during the screening of efficient and cold resistance aerobic denitrification bacteria that are adapted to actual water bodies.
© 2021, Science Press. All right reserved. Number of references:62 Main heading:Aerobic bacteria Controlled terms:Biogeochemistry - Decision trees - Denitrification - Forestry - Lakes - Organic compounds - Proteins Uncontrolled terms:Aerobic denitrification - Dissolved organic matters - Environmental factors - Fluorescence regional integration (FRI) - High-throughput sequencing - Humic-like substances - Microbial communities - Redundancy analysis (RDA) Classification code:461 Bioengineering and Biology - 481.2 Geochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 961 Systems Science DOI:10.13227/j.hjkx.202101290 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404957 Title:Estimation of the SOA Formation Potential of the National Trunk Highway in Central Plains Urban Agglomeration Title of translation:中原城市群国家干线公路SOA生成潜势估算 Authors:Wang, Na-Ping (1); Li, Hai-Ping (1); Zhang, Fan (2) Author affiliation:(1) School of Environment & Natural Resources, Renmin University of China, Beijing; 100872, China; (2) China Communications Construction Company, Highway Consultants Co., Ltd., Beijing; 100088, China Corresponding author:Li, Hai-Ping(lhping@ruc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2721-2729 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Secondary organic aerosols (SOAs) are among the main components of air pollution. Accurately estimating SOAs formed from automobile exhaust is crucial for controlling and mitigating traffic air pollution. Sufficient monitoring data is difficult for regional analysis owing to limited monitoring data over a small area or few observation stations. Indirect methods may be used to estimate SOA using data on the number and types of vehicles. A linear reference system of Central Plains urban agglomeration was built from the national trunk line network system and the traffic survey data of transportation. The numbers of different types of vehicles were assigned to road segments as the traffic flow according to the represented length between monitoring stations. Then, VOCs emissions were calculated through the emission coefficient method based on the previous traffic flow data. Moreover, further estimations of the SOA formation potential were made by the fractional aerosol coefficient approach. Through kernel density analysis, discrete point data of the observer station were transformed into line segments and expanded to a continuous spatial distribution for quantitative and spatial variation analysis of the SOA in the study area. The results show that ① toluene has the highest SOA generation potential, 1,4-diethylbenzene has the strongest ability to form SOA, and aromatic hydrocarbons exhibit higher SOA formation capacity than alkanes; ② small and medium gasoline passenger cars generate the most SOA and account for about 1/3 of the total SOA, but small gasoline trucks exhibit the strongest capacity for SOA formation; ③ regarding the capacity of SOA formation for vehicles using different fuel types, gasoline vehicles have a higher capacity than diesel vehicles, and passenger cars have a slightly higher capacity than trucks; ④ in Central Plains urban agglomeration, the spatial distribution of SOA intensity data shows a trend of convergence to the center of Zhengzhou city. Gasoline vehicles exhibit a similar pattern overall, but diesel vehicles exhibit a weaker trend that decreases distinctly. SOA intensity along the north-south direction is much higher than that of the east-west direction around the center of Zhengzhou crossing.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Monitoring Controlled terms:Aerosols - Agglomeration - Air pollution - Automobiles - Diesel engines - Diesel locomotives - Gasoline - Information dissemination - Regional planning - Spatial distribution - Toluene - Traffic surveys - Trucks - Urban transportation Uncontrolled terms:Automobile exhaust - Emission coefficient - Formation potential - Linear reference systems - Monitoring stations - Secondary organic aerosols - Spatial variations - Urban agglomerations Classification code:403.2 Regional Planning and Development - 432 Highway Transportation - 432.4 Highway Traffic Control - 433 Railroad Transportation - 451 Air Pollution - 523 Liquid Fuels - 612.2 Diesel Engines - 662.1 Automobiles - 663.1 Heavy Duty Motor Vehicles - 682.1.2 Locomotives - 802.3 Chemical Operations - 804.1 Organic Compounds - 903.2 Information Dissemination - 921 Mathematics DOI:10.13227/j.hjkx.202011255 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582341 Title:Factors and Their Interaction Effects on the Distribution of PM2.5 in the Yangtze River Delta Based on Grids Title of translation:基于网格的长三角PM2.5分布影响因素及交互效应 Authors:Huang, Xiao-Gang (1, 2, 3); Zhao, Jing-Bo (2, 3); Xin, Wei-Dong (1) Author affiliation:(1) College of Geographical Sciences, Shanxi Normal University, Linfen; 041004, China; (2) Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China; (3) School of Geography and Tourism, Shaanxi Normal University, Xi'an; 710119, China Corresponding author:Zhao, Jing-Bo(zhaojb@snnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3107-3117 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Spatial features of PM2.5 concentration in the Yangtze River Delta in 2016 were analyzed using remote sensing data. Selecting factors among meteorology, topography, vegetation, and emission list of air pollutants, factors and their interaction effects on the spatial distribution of PM2.5 concentration were studied based on GAM, with an evaluation unit of 0.25°×0.25° for the grid. It showed that: ① With a more significant difference between the north and south, PM2.5 concentration was generally higher in the north and west but lower in the south and east. In the southern part of the delta, the concentration was mostly lower than 35 μg•m-3, with noncompliance of the PM2.5 concentration scattered in urban areas like islands. Meanwhile, PM2.5 concentration is generally over 35 μg•m-3, and the pollution appeared like sheets. ② Besides, PM2.5 concentration showed an apparent positive spatial autocorrelation with "High-High" PM2.5 agglomeration areas in the north of the delta and "Low-Low" PM2.5 agglomeration areas in the south. ③ Based on GAM, hypsography, temperature, and precipitation negatively affected PM2.5 concentration, whereas pollutant emissions positively affected it. The effect of wind was minor when its speed <2.5 m•s-1, and more negatively significant when its speed ≥2.5 m•s-1. Hypsography, temperature, and precipitation were higher in the southern part of the delta, but they were lower in the northern part, leading to a higher PM2.5 concentration in the northern parts and lower in the southern parts. A higher wind speed in the east and lower in the west also led to a concentration difference between them. ④ All factors had passed a significant pair interaction test, except for hypsography and PM2.5 emission, and they all showed a significant interaction effect on the distribution of PM2.5 in the Yangtze River Delta.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:River pollution Controlled terms:Agglomeration - Air pollution - Remote sensing - Rivers - Spatial variables measurement - Topography - Wind Uncontrolled terms:Interaction effect - Pair interactions - PM2.5 concentration - Pollutant emission - Remote sensing data - Spatial autocorrelations - Spatial features - Yangtze river delta Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 453 Water Pollution - 802.3 Chemical Operations - 943.2 Mechanical Variables Measurements - 951 Materials Science DOI:10.13227/j.hjkx.202012101 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779871 Title:Influence of Precipitation Change on Soil Respiration in Desert Grassland Title of translation:降水变化对荒漠草原土壤呼吸的影响 Authors:Hao, Lian-Yi (1); Zhang, Li-Hua (1); Xie, Zhong-Kui (2); Zhao, Rui-Feng (1); Wang, Jun-Feng (1); Guo, Ya-Fei (1); Gao, Jiang-Ping (1) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China; (2) Gaolan Comprehensive Experimental Station of Ecology and Agriculture, Northwest Institute of Ecology and Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China Corresponding author:Zhang, Li-Hua(zhanglihualz@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4527-4537 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Global climate change has significantly changed precipitation patterns. Soil respiration (SR), as an important pathway through which CO2 is released from the soil carbon pool into the atmosphere, may affect the carbon cycle process of terrestrial ecosystems and have a feedback effect on global climate change in response to precipitation change. However, at present there is limited understanding of how SR is affected by precipitation change. Field precipitation control experiments were conducted (with -40%, -20%, natural, 20%, and 40% precipitation) on desert grassland in the west of the Loess Plateau, to investigate the influence of precipitation change on SR dynamics and its relationship with soil water content, soil temperature, aboveground biomass, soil organic carbon, microbial biomass carbon, carbon-nitrogen ratio, and other factors. The results show that the diurnal variations of SR under different precipitation treatments were consistent in unimodal and bimodal models over three years. SR showed an increasing trend with added precipitation, relative to the control, and significant differences were observed between the second year (wetter) and the third year (drier) of the precipitation-manipulation experiment, indicating that precipitation changes had a legacy effect on SR. At the same time, SR was lowest under the -40% treatment and highest under the 40% treatment during the wetter year. The negative response of SR to precipitation exclusion treatments was stronger than the positive response to precipitation addition treatments. SR in drier years was significantly higher under precipitation addition treatments than the control, and the positive response of SR to increased precipitation treatment was significantly stronger than that under decreased precipitation treatment. In addition, soil water content, aboveground biomass, soil organic carbon, and carbon-nitrogen ratio were the environmental factors that obviously affected SR and increased with additional precipitation. SR increased with increases in soil water content, aboveground biomass, soil organic carbon, and carbon-nitrogen ratio, but decreased with increases in microbial biomass carbon. Among these factors, soil water content had the highest interpretation rate for SR, indicating that soil water content was the main environmental factor controlling SR in desert grassland. In both wetter and drier years, the amplitude of plant biomass input was lower than the amplitude of SR output under precipitation change, indicating that precipitation change may be unfavorable to soil carbon sequestration, especially in drier years, when precipitation change has a stronger influence on carbon pool output. Therefore, precipitation changes on SR in desert grassland in various dry and wet years may have different influences on the carbon cycle process of ecosystems, thus providing a reference for regional carbon budget assessment.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Climate change Controlled terms:Biomass - Budget control - Driers (materials) - Ecosystems - Forestry - Landforms - Nitrogen - Organic carbon - Soil moisture Uncontrolled terms:Carbon-nitrogen ratio - Environmental factors - Global climate changes - Microbial biomass carbon - Precipitation controls - Precipitation patterns - Soil carbon sequestration - Terrestrial ecosystems Classification code:443.1 Atmospheric Properties - 454.3 Ecology and Ecosystems - 481.1 Geology - 483.1 Soils and Soil Mechanics - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage -2.00e+01%, Percentage -4.00e+01%, Percentage 2.00e+01%, Percentage 4.00e+01% DOI:10.13227/j.hjkx.202012204 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804544 Title:Size Distribution of Aerosol Hygroscopic Growth Factors in Winter in Tianjin Title of translation:天津市冬季气溶胶吸湿因子的粒径分布特征 Authors:Ding, Jing (1, 2); Zhang, Yu-Fen (1); Zheng, Nai-Yuan (3); Zhang, Hui-Tao (1); Yu, Zhuo-Jun (1, 3); Li, Li-Wei (3); Yuan, Jie (3); Tang, Miao (3); Feng, Yin-Chang (1) Author affiliation:(1) China Meteorological Administration-Nankai University Cooperative Laboratory for Atmospheric Environment-Health Research, State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China; (2) Tianjin Environmental Meteorological Center, Tianjin; 300074, China; (3) Tianjin Eco-Environmental Monitering Center, Tianjin; 300071, China Corresponding authors:Zhang, Yu-Fen(zhafox@126.com); Zheng, Nai-Yuan(zerozny2002@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:574-583 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Aerosol hygroscopic growth factors [g(RH)] are key for evaluating aerosol light extinction and direct radiative forcing. The hygroscopic tandem differential mobility analyzer (HTDMA) was utilized to measure the size-resolved gm(RH) under different polluted conditions in winter in Tianjin. Furthermore, based on the size distribution of aerosol water-soluble ions, the gκ(RH) across a wide size range (60 nm to 9.8 μm) was estimated using the κ-Köhler theory, which provides a basis for the estimation of aerosol optical parameters and direct radiative forcing under ambient conditions. Under clean conditions, ultrafine particles (<100 nm) were more hygroscopic and gm(RH=80%) was higher than 1.30 due to the active photolysis reaction. However, under severely polluted conditions, the proportion of water-soluble ions in aerosols increased with the increasing size; gm(RH) increased with particle size, where gm(RH=80%) and gm(RH=85%) for 300 nm particles was 1.39 and 1.46, respectively. For a wide size range (60 nm to 9.8 μm), the aerosols in the accumulation mode were more hygroscopic and aerosols in the Aitken mode were less hygroscopic, with coarse mode aerosols being the least hygroscopic. During the polluted period, the particulate size notably increased, and the mass fraction of NO3- and SO42- in the accumulation mode aerosols was significantly higher than during the clean period. Accordingly, the hygroscopicity of accumulation mode aerosols was strongly enhanced during the polluted period [gκ(RH)=1.3-1.4] and aerosols in the 0.18-3.1 μm size range all had a strong hygroscopicity. On polluted days, the synergistic effect of the increase in particle size, water-soluble ions, and aerosol hygroscopicity results in the considerable deterioration of visibility.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Aerosols Controlled terms:Atmospheric radiation - Deterioration - Ions - Light extinction - Particle size - Photolysis - Size distribution Uncontrolled terms:Aerosol hygroscopic growth factors - Aerosol light extinction - Aerosol optical parameters - Direct radiative forcing - Hygroscopic tandem differential mobility analyzers - Photolysis reaction - Synergistic effect - Water-soluble ions Classification code:443.1 Atmospheric Properties - 741.1 Light/Optics - 802.2 Chemical Reactions - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Size 1.80e-07m to 3.10e-06m, Size 3.00e-07m, Size 6.00e-08m to 9.80e-06m DOI:10.13227/j.hjkx.202007273 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688847 Title:Adsorption Effect and Mechanism of Aqueous Arsenic on FeMnNi-LDHs Title of translation:FeMnNi-LDHs对水中As(Ⅲ)的吸附性能与机制 Authors:Liao, Yu-Mei (1); Yu, Jie (1); Wei, Shi-Qiang (1); Jiang, Zhen-Mao (1) Author affiliation:(1) Chongqing Key Laboratory of Agricultural Resources and Environment Research, College of Resources and Environment, Southwest University, Chongqing; 400715, China Corresponding author:Jiang, Zhen-Mao(windring@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:293-304 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Removing As(Ⅲ)from water steadily and efficiently is still a challenging global issue. In this study, novel FeMnNi-LDHs were prepared by a co-precipitation method using Fe, Mn, and Ni as lamellar cations, and the structure were characterized by XRD, TEM, FT-IR, and XPS techniques, and the adsorption performance and mechanism of As(Ⅲ)was explored. The results showed that FeMnNi-LDHs have typical characteristic peaks of layered double hydroxides, with sharp peaks and high crystallinity. The TEM images also show obvious layered structures. The adsorption kinetics of As(Ⅲ)on FeMnNi-LDHs agree with the quasi second-order kinetic model, and the isotherm adsorption curve agrees with the Freundlich isotherm equation. The maximum adsorption capacity at 45℃ was 240.86 mg•g-1, which is significantly higher than other similar layered double hydroxides. Acidity had little effect on the adsorption performance of As(Ⅲ), and it had a good adsorption effect in the range of pH 2-9. The coexistence of PO43- and CO32- ions in water showed adverse effects on the As(Ⅲ) adsorption capacity, and NO3-, Cd2+, and Pb2+ had less influence. The adsorption mechanism of FeMnNi-LDHs for As(Ⅲ) includes ion exchange, oxidation, and coordination complexation, in which Mn plays a major role in the oxidation process of As(Ⅲ). The prepared FeMnNi-LDHs exhibited good application potential in the adsorption of As(Ⅲ) from water and toxicity control.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Adsorption Controlled terms:Adsorption isotherms - Arsenic - Crystallinity - Ion exchange - Iron metallography - Manganese metallography - Nickel metallography - Precipitation (chemical) Uncontrolled terms:Adsorption capacities - Adsorption mechanism - Adsorption performance - Characteristic peaks - Coprecipitation method - Freundlich isotherm equations - Layered double hydroxides - Second order kinetics Classification code:531.2 Metallography - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202005012 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688802 Title:Selenium Threshold for the Delimitation of Natural Selenium-Enriched Land Title of translation:天然富硒土地划定的富硒阈值 Authors:Wang, Hui-Yan (1, 2, 3); Zeng, Dao-Ming (1); Guo, Zhi-Juan (1, 2, 3); Cheng, Xiao-Meng (1); Peng, Min (1, 2, 3); Sun, Yue (1) Author affiliation:(1) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding author:Peng, Min(pengmin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:333-342 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The nationwide Se-enriched threshold plays a key role in identifying China's selenium-enriched land resources and developing characteristic agricultural practices. In this study, we used the cooperative data of 10 222 sets of crops and roots in China for the past 10 years with a systematic analysis of the selenium content characteristics of the soil and the status of selenium-enriched agricultural products. The preliminary estimates of the selenium-enriched threshold based on a bulk crop-soil linear model and population selenium-intake are presented. Finally, a collaborative analysis model of soil selenium-enrichment rate and crop selenium-enrichment rate is established, coming up with the nationwide Se-enriched threshold: total selenium≥ 0.40 μg•g-1 in paddy soil, and total selenium≥0.30 μg•g-1 in dryland soil. The threshold passed the feasibility test in 13 provinces, providing strong support for the China Geological Survey to formulate and promulgate this technical standard for the delimitation of the natural selenium-enriched land.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Selenium Controlled terms:Agricultural products - Agricultural robots - Crops - Soils Uncontrolled terms:Agricultural practices - Collaborative analysis - Enrichment rate - Feasibility tests - Land resources - Linear modeling - Systematic analysis - Technical standards Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4 Agricultural Products Numerical data indexing:Age 1.00e+01yr DOI:10.13227/j.hjkx.202005148 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404444 Title:Sources Apportionment of Oxygenated Volatile Organic Compounds (OVOCs) in a Typical Southwestern Region in China During Summer Title of translation:西南典型区域夏季大气含氧挥发性有机化合物来源解析 Authors:Chen, Mu-Lan (1, 2, 3); Wang, Sai-Nan (1, 2, 3); Chen, Tian-Shu (4); Zhu, Bo (5); Peng, Chao (1, 2); Zhou, Jia-Wei (1, 2); Che, Han-Xiong (1, 2); Huang, Rui-Hui (1, 2); Yang, Fu-Mo (6); Liu, He-Fan (7); Tan, Qin-Wen (7); Han, Li (8); Chen, Jun-Hui (8); Lu, Ke-Ding (9); Chen, Yang (1, 2, 3) Author affiliation:(1) Research Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China; (2) College of Resources and Environment, Chongqing School, University of Chinese Academy of Sciences (UCAS Chongqing), Chongqing; 400714, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 101400, China; (4) Environment Research Institute, Shandong University, Qingdao; 266237, China; (5) Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen; 518055, China; (6) College of Architecture and Environment, Sichuan University, Chengdu; 610065, China; (7) Chengdu Institute of Environmental Protection Science, Chengdu; 610031, China; (8) Sichuan Ecological and Environmental Science Research Department, Chengdu; 610041, China; (9) College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China Corresponding author:Chen, Yang(chenyang@cigit.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2648-2658 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Oxygenated volatile organic compounds (OVOCs) are important intermediates in the troposphere and the most important sources of ozone. Proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS) was used to measure VOCs in the Chengdu Plain, Southwestern China. The diurnal variations, photochemical reactivity, O3 formation potential, and sources were also investigated. The mixing ratios of ten kinds of VOCs (acetaldehyde, acetone, isoprene, Methyl ethyl ketone, Methyl vinyl ketone and Methacrolein, benzene, toluene, styrene, C8 aromatics, and C9 aromatics) were (10.97±4.69)×10-9. The concentrations of OVOCs, aromatic hydrocarbons, and biogenic VOCs were (8.54±3.44)×10-9, (1.53±0.93)×10-9, and (0.90±0.32)×10-9, respectively. Isoprene, acetaldehyde, and m-xylene were the top three photochemically active species with the greatest O3 formation potentials. The dominant three OVOCs species (acetaldehyde, acetone, and MEK) were mainly derived from local biogenic sources and anthropogenic secondary sources, and acetone had a strong regional background level, indicating that pollution in this area is significantly affected by regional transmission. This study deepens the understanding of regional O3 formation mechanisms in southwest China and provides a basis for the scientifically informed control of O3 pollution.
© 2021, Science Press. All right reserved. Number of references:47 Main heading:Aromatic hydrocarbons Controlled terms:Acetaldehyde - Acetone - Aromatization - Isoprene - Mass spectrometry - Pollution control - Proton transfer - Styrene - Volatile organic compounds Uncontrolled terms:Diurnal variation - Formation mechanism - Formation potential - Methyl ethyl ketones - Methyl vinyl ketones - Photochemical reactivity - Proton transfer reactions - Time of flight mass spectrometry Classification code:801 Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 932.1 High Energy Physics DOI:10.13227/j.hjkx.202010101 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688895 Title:Distribution Characteristics and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Atmospheric Deposition in Areas Adjacent to a Large Petrochemical Enterprise Title of translation:大型石化企业邻近区域大气沉降中多环芳烃赋存特征及源解析 Authors:Li, Da-Yan (1); Qi, Xiao-Bao (2); Wu, Jian (1); Huang, Shen-Fa (1); Wang, Min (1); Sha, Chen-Yan (1); Shen, Cheng (1) Author affiliation:(1) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (2) Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai; 200092, China Corresponding author:Wu, Jian(wuj@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:106-113 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the influence of polycyclic aromatic hydrocarbons (PAHs) emissions by petrochemical enterprises on the surrounding environment, atmospheric deposition samples of the PAHs were collected in the industrial and residential areas adjacent to a petrochemical enterprise from March 2017 to February 2018. Deposition fluxes and the composition of PAHs were studied. The source of PAHs was analyzed by a positive matrix factor (PMF) model. The results showed that the deposition fluxes of ∑15PAHs ranged from 549 ng•(m2•d)-1 to 18 845 ng•(m2•d)-1, with an average of 2 712 ng•(m2•d)-1. The flux of ∑15PAHs in the industrial area was 1.36 times greater than that in the residential area. The deposition fluxes of PAHs in winter and spring were higher than those in summer and autumn. The deposition flux was highest in January in the industrial area and lowest in October in the residential area. Phe, BbF, and Fla were the dominant monomers. There was noticeable difference of monomers between the industrial area and the residential area in summer and autumn. The monomers, such as BbF, BkF, and BgP, in the residential area were higher than those in industrial area, and the proportion of 5, 6 rings was higher, which indicated that traffic contributed more to the residential area; 3 ring PAHs in industrial area had a higher proportion, which pointed out that their main source was petroleum volatilization. Based on the quantitative source analysis, the PAHs in atmospheric deposition were mainly from traffic emissions, petroleum volatilization, and coal combustion. Three sources of PAHs accounted for 45.7%, 18.4%, 35.9%, and 46.3%, 21.4%, and 32.3%, respectively, in the industrial area and the residential area in winter and spring. In summer and autumn, the contribution of traffic sources to the residential area was as high as 65.2%, and the proportion of the petroleum source to the industrial area increased to 35.5%. Due to high-altitude emissions and favorable diffusion conditions, the coal combustion contribution was significantly reduced.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Polycyclic aromatic hydrocarbons Controlled terms:Atmospheric chemistry - Coal combustion - Deposition - Gasoline - Housing - Industrial emissions - Meteorological problems - Mineral oils - Monomers - Petrochemicals - Petroleum analysis - Springs (components) Uncontrolled terms:Atmospheric depositions - Deposition fluxes - Distribution characteristics - Petrochemical enterprise - Polycyclic aromatic hydrocarbons (PAHS) - Positive matrices - Source apportionment - Surrounding environment Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 513.3 Petroleum Products - 521 Fuel Combustion and Flame Research - 523 Liquid Fuels - 524 Solid Fuels - 601.2 Machine Components - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.84e+01%, Percentage 2.14e+01%, Percentage 3.23e+01%, Percentage 3.55e+01%, Percentage 3.59e+01%, Percentage 4.57e+01%, Percentage 4.63e+01%, Percentage 6.52e+01% DOI:10.13227/j.hjkx.202005263 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688821 Title:Regulation Control of a Tribasic Amendment on the Chemical Fractions of Cd and As in Paddy Soil and Their Accumulation in Rice Title of translation:三元复合调理剂对土壤镉砷赋存形态和糙米镉砷累积的调控效应 Authors:Jiang, Yi (1); Liu, Ya (1); Gu, Jiao-Feng (1, 2); Yang, Shi-Tong (1); Zeng, Xiong (1); Wang, Xuan-Ning (1); Zhou, Hang (1, 2); Liao, Bo-Han (1, 2) Author affiliation:(1) College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China; (2) Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha; 410004, China Corresponding authors:Gu, Jiao-Feng(gujiaofeng@163.com); Zhou, Hang(zhouhang4607@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:378-385 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A pot experiment was conducted to identify the effect of a tribasic amendment (limestone+diatomite+ferric sulfate, LDF) on chemical fractions of Cd and As in paddy soils and their accumulation in brown rice. LDF was set to seven levels (0, 0.5, 1.0, 2.0, 4.0, 8.0, and 16.0 g•kg-1) based on the quality ratio, and two genotypes of rice were planted (Huanghuazhan and T-you 272). The results show that: ① The application of LDF increased the rhizosphere soil pH of two varieties of rice, Huanghuazhan and T-you 272, by 0.01-0.42 and 0.11-0.54, respectively, and decreased the concentrations of EX-Cd by 11.1%-61.1% and 26.5%-52.9%, respectively, and the concentrations of EX-As by 8.2%-60.0% and 5.6%-49.9%, respectively. ② Application of LDF promoted the transformation of soil Cd and As from soluble to insoluble forms. Although the trends of the rhizosphere soils of the two rice varieties were not consistent, the application of LDF could decrease the proportion of EX-Cd and increase the proportion of Fe/Mn-Cd, Org-Cd, and O-Cd, which was accompanied by the reduction of the proportion of EX-As and an increase in the proportion of Ca-As. ③ The concentrations of Cd, As, and Fe in the iron plaque decreased by applying LDF, while the concentration of Mn increased, and the maximum increase of Mn could reach 124.2%. ④ Application of LDF decreased the concentrations of Cd in brown rice of the two varieties of rice by 64.6% and 65.9%, respectively, and decreased that of As by 37.0% and 42.5%, respectively. The effect on the concentrations of inorganic As was not significant. When the application amount of LDF was 2-16 g•kg-1, the concentrations of Cd and inorganic As in T-you 272 brown rice were both under 0.2 mg•kg-1, and when the application amount was 16 g•kg-1, the concentrations of Cd and inorganic As in Huanghuazhan brown rice were both under 0.2 mg•kg-1. In actual agricultural production, the application amount of LDF can be adjusted according to the soil pollution levels and the rice varieties.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Soil pollution Controlled terms:Agricultural robots - Agriculture - Cadmium - Iron compounds - Lime - Manganese - Soils - Sulfur compounds Uncontrolled terms:Agricultural productions - Chemical fractions - Ferric sulfate - Iron plaques - Pollution level - Pot experiment - Regulation control - Rhizosphere soils Classification code:483.1 Soils and Soil Mechanics - 543.2 Manganese and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 1.11e+01% to 6.11e+01%, Percentage 1.24e+02%, Percentage 2.65e+01% to 5.29e+01%, Percentage 3.70e+01%, Percentage 4.25e+01%, Percentage 5.60e+00% to 4.99e+01%, Percentage 6.46e+01%, Percentage 6.59e+01%, Percentage 8.20e+00% to 6.00e+01% DOI:10.13227/j.hjkx.202006126 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247578 Title:Preparation of Ag3PO4/g-C3N4 Composite Photocatalysts and Their Visible Light Photocatalytic Performance Title of translation:Ag3PO4/g-C3N4复合光催化剂的制备及其可见光催化性能 Authors:Gao, Chuang-Chuang (1); Liu, Hai-Cheng (1, 2); Meng, Wu-Shuang (1); Hao, Shuang-Ling (1); Xue, Ting-Ting (1); Chen, Guo-Dong (1); Acquah, Joseph (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Key Laboratory of Comprehensive Management and Resource Development of Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China Corresponding author:Liu, Hai-Cheng(hhua306@sohu.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2343-2352 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The visible light-driven photocatalyst Ag3PO4/g-C3N4 was synthesized by a simple in-situ precipitation method. The synthesized samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectroscopy. Compared with that of single Ag3PO4 and g-C3N4, the Ag3PO4/g-C3N4 composite had a higher catalytic efficiency for levofloxacin. According to the energy band analysis and free radical capture experiment, the mechanism of the Z-type heterostructure of the Ag3PO4/g-C3N4 composite was proposed.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Silver compounds Controlled terms:Fourier transform infrared spectroscopy - Free radicals - Light - Photocatalytic activity - Precipitation (chemical) - Scanning electron microscopy - X ray photoelectron spectroscopy Uncontrolled terms:Catalytic efficiencies - Composite photocatalysts - In-situ precipitation - Levofloxacin - Photocatalytic performance - UV-Vis diffuse reflectance spectroscopy - Visible light - Visible light driven photocatalysts Classification code:741.1 Light/Optics - 801 Chemistry - 802.3 Chemical Operations DOI:10.13227/j.hjkx.202009132 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804531 Title:Trends in Vehicle Emissions in Sichuan Province, 2010-2017 Title of translation:2010~2017年四川省机动车污染物排放趋势分析 Authors:Li, Yuan (1, 2); Shi, Jia-Cheng (1, 2); Chen, Jun-Hui (1, 2); Pan, Yu-Jin (1, 2); Zhou, Hong-Hui (1, 2); Fan, Wu-Bo (1, 2); Ye, Hong (1); Qian, Jun (1); Liu, Zheng (1) Author affiliation:(1) Sichuan Academy of Environmental Science, Chengdu; 610041, China; (2) Sichuan Environmental Protection Research Laboratory of Moving Source Pollution Control, Chengdu; 610041, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:643-652 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Vehicle pollution in Sichuan Province is becoming increasingly serious. Here, based on specific inventory calculation methods and multi-caliber activity level data, this study calculated vehicle exhaust emissions from 2010 to 2017 in Sichuan Province. The results show that the average growth rate of vehicle ownership in Sichuan is higher than the national trend. In 2017, vehicle emissions of CO, NOx, SO2, NH3, HC, PM2.5, PM10, BC, and OC were 706.9, 275.3, 0.3, 5.7, 164.8, 8.1, 8.9, 4.1, and 1.4 kt, respectively. Except for NH3, showed a downward trend, peaking in 2014-2016. Diesel vehicle ownership showed a strong correlation with the emission of NOx. Based on these observations, stricter vehicle emission standards offer the greatest potential for emissions reductions, with early implementation offering the greatest reduction potential. The improvement of fuel quality will also have more than a 6% emission reduction effect on pollutant emission each year. HC and NOx emissions reductions will be an important control on vehicle pollution in Sichuan Province in the future.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Vehicles Controlled terms:Ammonia - Emission control - Growth rate - Nitrogen oxides - Sulfur dioxide Uncontrolled terms:Average growth rate - Emission reduction - Emissions reduction - Pollutant emission - Reduction potential - Strong correlation - Vehicle exhaust emissions - Vehicle ownership Classification code:451.2 Air Pollution Control - 804.2 Inorganic Compounds Numerical data indexing:Percentage 6.00e+00% DOI:10.13227/j.hjkx.202003156 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126258 Title:PAHs Pollution Characteristics and Source Analysis of Typical Lake and Reservoir Sediments in Jin-Ji-Liao Area Title of translation:津冀辽地区典型湖库沉积物PAHs污染特征及来源解析 Authors:Wu, Peng (1, 2, 3, 4); Lu, Yi-Ren (1); Li, Hui (2, 3, 4); Zheng, Tian-Jiaozi (2, 3, 4); Cheng, Yun-Xuan (2, 3, 4); Jiao, Li-Xin (2, 3, 4) Author affiliation:(1) School of Environmental Science & Engineering, Tianjin University, Tianjin; 300002, China; (2) National Engineering Laboratory of Lake Water Pollution Control and Ecological Restoration Technology, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) State Key Laboratory of Environmental Protection for Drinking Water Sources, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (4) National Key Laboratory of Environmental Protection Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Jiao, Li-Xin(jiaolx@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1791-1800 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this research, 29 surface sediments samples of three typical lake reservoirs (in Yuqiao Reservoir, Hengshui Lake, and Dahuofang Reservoir) in the Jin-Ji-Liao area were collected and investigated, and the contents of 16 polycyclic aromatic hydrocarbons were detected using GC-MS. The results show that the Sigma PAHs (ng•g-1) in the sediments were 337.3-1 604.1 (mean value 820.0), 461.1-1 497.5 (mean value 932.3), and 102.3-2 240.5 (mean value 564.9), respectively. Compared with other domestic rivers and lakes, the pollution levels of the PAHs in the three typical lakes were all at a medium level. The three lakes and reservoirs had consistency in the ratio of the number of rings, which is primarily high. PAHs source analyses were carried out by the characteristic ratio and primary component analysis method, and the results show that three lakes reservoirs pollution were caused mostly by combustion sources (including petroleum, coal, and biomass combustion), with a few petroleum sources. Additionally, the pollution contribution ratio of incomplete combustion of gasoline and diesel oil was 51.4%, and the pollution contribution ratio of combustion of coal and firewood were 22.3%. The risk evaluation results indicate that PAHs in the surface sediments of Yuqiao Reservoir, Hengshui Lake, and Dahuofang Reservoir are generally at a medium and low level, but the monitoring of three types of substances, Flu, InP, and DahA, should be strengthened, and corresponding emergency measures should be taken.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Lake pollution Controlled terms:Coal combustion - Gasoline - III-V semiconductors - Indium phosphide - Lakes - Petroleum analysis - Petroleum reservoir evaluation - Polycyclic aromatic hydrocarbons - Risk assessment - River pollution - Semiconducting indium phosphide - Surficial sediments Uncontrolled terms:Biomass combustion - Characteristic ratio - Combustion sources - Contribution ratios - Incomplete combustion - Lake sand reservoirs - Primary component analysis - Reservoir sediments Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 512.1.2 Petroleum Deposits : Development Operations - 521 Fuel Combustion and Flame Research - 523 Liquid Fuels - 524 Solid Fuels - 712.1.2 Compound Semiconducting Materials - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.23e+01%, Percentage 5.14e+01% DOI:10.13227/j.hjkx.202008046 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003374 Title:Spatial-Temporal Variation of Water Environment Quality and Pollution Source Analysis in Hengshui Lake Title of translation:衡水湖湿地水环境质量时空变化特征及污染源分析 Authors:Liu, Wei-Wei (1, 2); Guo, Zi-Liang (1, 2); Wang, Da-An (1, 2); Zhang, Man-Yin (1, 2); Zhang, Yu-Guang (2, 3) Author affiliation:(1) Beijing Key Laboratory of Wetland Services and Restoration, Institute of Wetland Research, Chinese Academy of Forestry, Beijing; 100091, China; (2) National Ecosystem Research Station of Hengshui Lake Wetland, Hengshui; 053000, China; (3) Administrative Committee of Hebei Hengshui Lake National Nature Reserve, Hengshui; 053000, China Corresponding author:Zhang, Man-Yin(cneco@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1361-1371 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the spatial-temporal variation of water environment quality in Hengshui Lake and determine the associated pollution sources, we used historical water monitoring data (from 2000 onwards) and data from 17 sites sampled in 2019 to determine the trophic level index (TLI), comprehensive water quality index (WQI), and water environment quality index (EQI). The results showed that the proportion of monitoring points reaching level Ⅲ increased from 2000 to 2019. The permanganate index, total nitrogen, and total phosphorus were the main water environmental indicators. Spatially, TLI, WQI, and EQI all generally decreased from the south to the middle and west of the lake, and then further decreased towards the northeast. After the establishment of the Hengshui Lake National Nature Reserve, a series of water body protection policies and measures were implemented. These interventions are reflected in reductions in the TLI, WQI, and EQI between 2000 and 2019 by 20.9%, 53.4%, and 49.2%, respectively. However, side seepage and sewage discharge, agricultural non-point source pollutants transported by water diversion, and the decay of plants in the lake present significant challenges for water quality in Hengshui Lake.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Lake pollution Controlled terms:Agricultural robots - Flood control - Lakes - Sewage - Water quality Uncontrolled terms:Environmental indicators - Monitoring points - Non-point source pollutants - Pollution sources - Sewage discharges - Trophic level indexes - Water environments - Water quality indexes Classification code:442.1 Flood Control - 445.2 Water Analysis - 452.1 Sewage - 453 Water Pollution Numerical data indexing:Percentage 2.09e+01%, Percentage 4.92e+01%, Percentage 5.34e+01% DOI:10.13227/j.hjkx.202008048 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779787 Title:Antagonistic Effect and Mechanism of Nano Titanium Dioxide and Cadmium on the Growth of Scenedesmus obliquus Title of translation:纳米二氧化钛与镉对斜生栅藻(Scenedesmus obliquus)生长的拮抗效应及其作用机制 Authors:Wang, Pu (1, 2); Zhao, Li-Hong (1, 2); Zhu, Xiao-Shan (1, 2) Author affiliation:(1) Shenzhen International Graduate School, Tsinghua University, Shenzhen; 518055, China; (2) School of Environment, Tsinghua University, Beijing; 100084, China Corresponding author:Zhu, Xiao-Shan(zhu.xiaoshan@sz.tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4350-4357 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The release of manufactured nanomaterials (MNMs) into the environment has raised concerns about combined toxicological risks, as MNMs could significantly alter the environmental behavior and fate of co-existing contaminants. Numerous studies have been published on the combined toxicity of MNMs and co-existing contaminants, but the potential mechanisms controlling the combined toxicity, especially the biological response mechanism, remain unclear. This study investigated the combined toxicity of nano-titanium dioxide (nTiO2), a typical MNM, and the heavy metal cadmium (Cd2+), using Scenedesmus obliquus as the test organism. The molecular mechanism was examined under different concentrations, using an equivalent dose (toxic ratio 1: 1) on S. obliquus. The results showed that the 72h-EC50 of nTiO2 and Cd2+ at the equivalent dose was significantly higher than that of single exposure, indicating an antagonistic effect. Further transcriptomics analysis revealed that the photosynthesis, chlorophyll metabolism, and starch and sucrose metabolism pathways involved in the energy metabolism of S. obliquus were significantly up-regulated in the presence of nTiO2. The arginine and proline metabolic pathways related to the anti-stress effect of algae cells also showed positive stimulation. The results of this study provide an important reference and a research basis for in-depth understanding of the environmental effects of MNMs and co-existing contaminants.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Metabolism Controlled terms:Amino acids - Cadmium - Oxides - Titanium dioxide - Toxicity Uncontrolled terms:Antagonistic effects - Biological response - Chlorophyll metabolism - Environmental behavior - In-depth understanding - Manufactured nanomaterials - Nano-titanium dioxide - Scenedesmus obliquus Classification code:461.7 Health Care - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202101078 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804558 Title:Distribution of Nitrogen and Phosphorus in Lake Chaohu Sediments and Pollution Evaluation Title of translation:巢湖沉积物氮磷分布及污染评价 Authors:Wang, Yan-Ping (1, 2, 3); Xu, Wei-Wei (2); Han, Chao (2); Hu, Wei-Ping (2) Author affiliation:(1) School of Geographical Science, Nantong University, Nantong; 226019, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Hu, Wei-Ping(wphu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:699-711 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We investigated the spatial distribution and storage of nitrogen and phosphorus in Lake Chaohu sediments and evaluated the sediment nitrogen and phosphorus pollution index. Results show that the average total nitrogen (TN) and total phosphorus (TP) content in the surface-layer sediments of Lake Chaohu were 1088 mg•kg-1and 585 mg•kg-1, respectively, and 666 mg•kg-1 and 509 mg•kg-1 in the bottom-layer sediments, respectively. TN content in the surface layer was significantly higher than in the bottom layer (P<0.01). Spatially, TN, TP, and sediment thickness were ranked in the order western lake area>eastern lake area>middle lake area, and the TN and TP contents were significantly different in the surface sediments from the middle and eastern areas of the lake (P<0.05, P<0.01). TN and TP storage in the lake sediments was 1.58×105 t and 0.98×105 t, respectively. TN and TP were significantly correlated in both the western and middle parts of the lake (P<0.01). In addition, TN was significantly correlated with sediment thickness in middle area of the lake, which indicated that TN may have the same pollution sources as TP and both were affected by sediment thickness. TN pollution index (STN), TP pollution index (STP), and comprehensive pollution index (FF) values were 1.09, 1.39, and 1.32, respectively, indicating light-to-moderate levels of pollution. Specifically, the western lake surface sediments were heavily polluted with respect to TP, the eastern lake surface sediments were moderately polluted, and the middle lake surface sediments were slightly polluted. Nutrient pollution varied widely between different areas of the lake, with sediments in the western part of the lake presenting a higher safety risk. Overall, these observations indicate that Lake Chaohu is threatened by internal nutrient loading.
© 2021, Science Press. All right reserved. Number of references:93 Main heading:Lakes Controlled terms:Nitrogen - Nutrients - Phosphorus - Pollution - Surficial sediments Uncontrolled terms:Nitrogen and phosphorus - Nutrient loading - Nutrient pollution - Pollution evaluation - Pollution sources - Sediment thickness - Surface sediments - Total phosphorus Classification code:483 Soil Mechanics and Foundations - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202006216 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003420 Title:Chemical Characteristics and Causes of Groups Water in Niangziguan Spring Title of translation:娘子关泉群水化学特征及成因 Authors:Tang, Chun-Lei (1, 2, 3); Zhao, Chun-Hong (1, 3); Shen, Hao-Yong (1, 3); Liang, Yong-Ping (1, 3); Wang, Zhi-Heng (1, 3) Author affiliation:(1) Key Laboratory of Karst Dynamics, Guangxi Zhuang Autonomous Region, Ministry of Land and Resources, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) College of Water Conservancy Science and Engineering, Taiyuan University of Technology, Taiyuan; 030024, China; (3) International Research Center on Karst under the Auspices of United Nations Educational, Scientific and Cultural Organization, Guilin; 541004, China Corresponding author:Zhao, Chun-Hong(zhaochunhong@karst.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1416-1423 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Discharge in Niangziguan Spring is 7.19 m3•s-1, which is the main water supply source for Yangquan City and Pingding County. Every year, Yangquan municipal government take water from the mouth of Niangziguan Spring to supply drinking water to urban residents at a rate of approximately 1.7 m3•s-1. It is of great significance to determine the characteristics and causes of variations in spring water flow conditions for the appropriate utilization of water resources and pollution prevention. Here, sample collection and hydrochemical isotope analyses were undertaken for the Niangziguan Spring area to chemically characterize the water environment and genesis. The pH of the karst spring is 7.2-7.5 with an average of 7.36; the calcium content of the water is 112.1-135.2 mg•L-1 with a mean value of 131.4 mg•L-1; the concentration of magnesium ions is 34.8-42.3 mg•L-1 with an average of 40.8 mg•L-1; the concentration of K++Na- ions is 41.6-46.7 mg•L-1 with an average of 45.2 mg•L-1; and the sulfate ion concentration is 185.6-271.8 mg•L-1 with a mean value of 255.4 mg•L-1. The hydrochemical type of the aquifer is classified as HCO3•SO4-Ca•Mg. The spring water is characterized by high Ca2+, Mg2+, and SO42- concentrations, and low Na+, K+, and Cl- concentrations. The supply path of Chengxi Spring is shortest followed by Wulong Spring. The supply paths of the remaining five spring are much longer. The Niangziguan Spring water environment is characterized by increasing pollution from coal mine acid drainage alongside decreasing inputs from domestic sewage. Environmental isotope tracing shows that sulfate in Chengxi Spring mainly derives from precipitation and gypsum dissolution, and the concentrations of sulfate in Wulong Spring are increasing. These changes are mainly driven by the amount of coal mine acid water pollution in the area.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Springs (water) Controlled terms:Aquifers - Coal industry - Coal mines - Flow of water - Hydrochemistry - Isotopes - Metal ions - Potable water - Sewage - Springs (components) - Sulfur compounds - Water pollution - Water supply Uncontrolled terms:Chemical characteristic - Environmental isotopes - Gypsum dissolution - Municipal government - Niangziguan springs - Pollution prevention - Water environments - Water supply sources Classification code:444 Water Resources - 444.2 Groundwater - 446.1 Water Supply Systems - 452.1 Sewage - 453 Water Pollution - 481.2 Geochemistry - 503 Mines and Mining, Coal - 503.1 Coal Mines - 524 Solid Fuels - 531.1 Metallurgy - 601.2 Machine Components - 631.1.1 Liquid Dynamics Numerical data indexing:Mass_Density 1.12e-01kg/m3 to 1.35e-01kg/m3, Mass_Density 1.86e-01kg/m3 to 2.72e-01kg/m3, Mass_Density 2.55e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 3.48e-02kg/m3 to 4.23e-02kg/m3, Mass_Density 4.16e-02kg/m3 to 4.67e-02kg/m3 DOI:10.13227/j.hjkx.202007047 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003457 Title:Industrial Emission Characteristics and Control Countermeasures of VOCs in Chinese Rapid Economic Development Areas Title of translation:我国经济快速发展区工业VOCs排放特征及管控对策 Authors:Meng, Bo-Wen (1, 2, 3); Li, Yong-Bo (4); Meng, Jing (2, 3); Li, Qian-Qian (2, 3); Shi, Bin (2, 3); Zhou, Xi-Bin (1); Li, Jin-Ling (1); Su, Gui-Jin (2, 3) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China; (2) Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Luannan County Branch of Tangshan Ecology and Environment Bureau, Tangshan; 063500, China Corresponding author:Su, Gui-Jin(gjsu@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1023-1038 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the rapid development of China's economy, volatile organic compounds (VOCs) as the precursor of smog and ozone are of increasing concern, especially in rapidly developing areas. This paper is a systematic analysis of VOCs emissions and distribution trends in 12 typical industrial sectors, garbage and wastewater treatment plants, comprehensive industrial parks, and residential districts in Beijing-Tianjin-Hebei, Yangtze River Delta, and Pearl River Delta Regions. The results show that pharmacy, rubber producing, as well as paint spraying are the top three industries among the 12 typical industries with the highest average VOCs emission concentrations at 541, 499, and 450 mg•m-3, respectively. By comparison, the average emission concentration of VOCs from the pharmaceutical industry in Yangtze River Delta and Beijing-Tianjin-Hebei Region was, respectively, about 112 and 1.00×103 mg•m-3. The paint spraying industry in the Pearl River Delta region has the highest emission rate with an average concentration of 1.04×103 mg•m-3. The investigation pertaining to the distribution of different VOCs categories indicates that highly toxic aromatics and halogenated hydrocarbons account for the highest emissions in paint spraying and pharmaceutical industries, reaching ratios of 55.99% and 26.57%, respectively. Additionally, among the three major economic zones, the VOCs concentration is the lowest in residential areas and comprehensive industrial parks in the Yangtze River Delta but the highest in the Beijing-Tianjin-Hebei Region, which is consistent with the distribution of industrial emissions in each region. Moreover, the research reveals that VOCs concentration in residential districts experienced a fluctuating reduction from 2002 to 2018. The significant reduction since 2016 suggests that formulated policies, laws and standards, along with the performed techniques have made significant contributions to the control of VOCs.
© 2021, Science Press. All right reserved. Number of references:191 Main heading:Industrial economics Controlled terms:Aromatic hydrocarbons - Housing - Industrial emissions - Industrial water treatment - Paint - Paint spraying - Rivers - Rubber industry - Sewage treatment plants - Volatile organic compounds - Wastewater treatment Uncontrolled terms:Average concentration - Beijing-tianjin-hebei regions - Emission characteristics - Emission concentration - Halogenated hydrocarbons - Pearl River Delta region - Pharmaceutical industry - Wastewater treatment plants Classification code:403.1 Urban Planning and Development - 445.1.2 Water Treatment Techniques for Industrial Use - 451.1 Air Pollution Sources - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 804.1 Organic Compounds - 813.1 Coating Techniques - 813.2 Coating Materials - 818.4 Rubber Factories and Machinery - 911.2 Industrial Economics Numerical data indexing:Percentage 2.66e+01%, Percentage 5.60e+01% DOI:10.13227/j.hjkx.202008210 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804561 Title:Effect and Mechanism of Foliar Application Nano-MnO2 on Cadmium Enrichment of Rice Title of translation:叶面喷施纳米MnO2对水稻富集镉的影响机制 Authors:Zhou, Yi-Min (1); Huang, Ya-Yuan (1); Liu, Xiao-Yue (2); Li, Bing-Yu (1); Liu, Yu-Yi (3); Li, Zhuo-Qing (1); Wang, Xin-Qi (1); Lei, Ming (1) Author affiliation:(1) College of Resources and Environment, Hunan Agricultural University, Changsha; 410128, China; (2) Aerospace Kaitian Environmental Technology Co., Ltd., Changsha; 410100, China; (3) Hunan Breath Environment Technology Co., Ltd., Changsha; 410000, China Corresponding author:Lei, Ming(leiming8297@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:932-940 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cadmium (Cd) is easily enriched in rice, resulting in an excessive Cd content in the grain, which seriously threatens human health. Manganese (Mn) is an essential element of plants. In a field experiment on Cd-contaminated acid soils, we investigated the effectiveness and mechanism of Mn in minimizing Cd accumulation in rice via foliar spraying using 0.1%, 0.3%, and 0.5% nano-MnO2 solutions at an early stage of heading. Compared with a control treatment, foliar spraying effectively reduced the Cd content of rice leaves, husks, and brown rice; increased the Mn content of all rice organs; but had no effect on rice yield. Foliar application of nano-MnO2 alleviated the plant stress induced by Cd by improving leaf photosynthesis, inhibiting lipid peroxidation, and increasing the content of the oxidative stress protein kinase. In addition, foliar application of nano-MnO2 limited the absorption of Cd by roots by increasing the content of iron-manganese plaque on the surfaces of rice roots and strengthening its adsorption/co-precipitation of Cd. Therefore, foliar application of nano-MnO2 during the early stages of rice heading is an effective measure to increase the Mn content and reduce the Cd content of brown rice.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Manganese oxide Controlled terms:Cadmium - Manganese - Plants (botany) - Soil pollution - Soils Uncontrolled terms:Cd accumulation - Control treatments - Effective measures - Essential elements - Field experiment - Foliar application - Leaf photosynthesis - Lipid peroxidation Classification code:483.1 Soils and Soil Mechanics - 543.2 Manganese and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally Numerical data indexing:Percentage 1.00e-01%, Percentage 3.00e-01%, Percentage 5.00e-01% DOI:10.13227/j.hjkx.202006292 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804505 Title:Hydrochemical Characteristics and Analysis of the Qilihai Wetland, Tianjin Title of translation:天津七里海湿地水化学组成及主要离子来源分析 Authors:He, Ming-Xia (1, 2); Zhang, Bing (1); Xia, Wen-Xue (1); Cui, Xu (1, 2); Wang, Zhong-Liang (1, 2) Author affiliation:(1) Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin; 300387, China; (2) School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin; 300387, China Corresponding author:Zhang, Bing(zhangbing@tjnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:776-785 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Hydrochemistry is an important parameter for wetland water environmental assessment. To study the hydrochemistry and main ion sources in the Qilihai wetland in Tianjin, river water, groundwater, and water in the marsh were collected and analyzed. The results show that: ① The river and marsh waters are SO4•Cl-Na in type and groundwater water is HCO3-Na and HCO3-Na•Ca in type. The water in the marshes is mainly recharged by river water and the exchange of shallow groundwater with river water is notable; ② Precipitation has little effect on the chemical composition of the water. Na+ and K+ were derived from the dissolution of salt rock and evaporative concentration. Ca2+, Mg2+, and HCO3- in the river and marsh water are mainly derived from the dissolution of evaporite salt rock. Ca2+, Mg2+, and HCO3- in the groundwater are mainly derived from carbonate mineral dissolution; ③ The hydrochemical composition of the river water and groundwater is notably affected by ion exchange, but this was not observed in the marsh water. Furthermore, SO42- and NO3- are affected by human activity. During the dry season, the river and marsh water are affected by evaporite salt rock dissolution, evaporation, and human effects, while in wet season, river water is mainly affected by carbonate dissolution and human activities. These observations demonstrate how that hydrochemical composition of this wetland is controlled by a combination of natural factors and human activities.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Hydrochemistry Controlled terms:Dissolution - Groundwater - Groundwater geochemistry - Ion exchange - Ion sources - Precipitation (chemical) - Rivers - Salt deposits - Wetlands Uncontrolled terms:Chemical compositions - Environmental assessment - Evaporative concentration - Groundwater water - Hydrochemical characteristics - Mineral dissolution - Qilihai wetlands - Shallow groundwater Classification code:444.2 Groundwater - 481.2 Geochemistry - 505.1 Nonmetallic Mines - 802.2 Chemical Reactions - 802.3 Chemical Operations - 932.1 High Energy Physics DOI:10.13227/j.hjkx.202005228 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688841 Title:Effect of Biochar and Chemical Fertilizer Mixture on Ammonia Volatilization and Phosphorus Fixation Title of translation:生物炭与化肥混合对氨挥发和磷固定的影响 Authors:Yang, Wen-Na (1); Deng, Zhen-Xin (1); Li, Jiao (1); Zhen, Jie-Bing (2); Wang, Zi-Fang (1); Gao, Ming (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Institute of Geology and Mineral Resources, Chongqing; 401120, China Corresponding author:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:467-476 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore biochar fertilizer addition, two types of industrial wastes (YM) and lees (JZ) and agricultural waste corn stover (JG) were used as the raw materials to make biochar, and the biochar was modified to make smoke-modified biochar (M-YM). The culture test method was used to study the law of ammonia volatilization and phosphorus fixation over a certain period of time with the different fertilizer ratios of the four biochars. We aimed to provide a scientific basis for the agricultural utilization of biochar. The results show that: ① The cumulative volatilization and volatilization rate of ammonia of the four kinds of biochar with different fertilizer ratios were as follows: A1>A2>A3 (A1: 2.25 g urea; A2: 2.25g urea +2.25 g chlorination potassium; A3: 2.25 g urea +2.25 g potassium dihydrogen phosphate). The addition of potassium chloride and potassium dihydrogen phosphate in urea reduced ammonia volatilization, and the cumulative ammonia volatilization and volatilization rate of different biochars under all chemical fertilizer ratios was JZ>M-YM>YM>JG; ②The amount of phosphorus by biochars fixation under the B1, B2, and B3 treatments (B1: 0.4 g potassium dihydrogen phosphate; B2: 0.4 g potassium dihydrogen phosphate +0.3 g urea; B3: 0.4 g potassium dihydrogen phosphate +0.3 g potassium chloride) all increased and then decreased. Then, the fixation amount of phosphorus not significantly changed in period from 30th to 60th day. Among four biochar, the fixation rate of phosphorus was the highest under the B1 treatment.With the ratios of B1, B2, and B3 fertilizers, the order of the fixation rate of the four biochars to phosphorus was: M-YM>YM>JG>JZ. Therefore, in order to reduce the volatilization of ammonia in nitrogen fertilizers in agricultural fertilization, potassium chloride and potassium dihydrogen phosphate can be added to urea. At the same time, in the fixation of phosphorus, increasing the particle size of biochar may weaken the phosphorous fixation ability.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Urea fertilizers Controlled terms:Agricultural robots - Agricultural wastes - Agriculture - Ammonia - Chlorine compounds - Industrial wastes - Metabolism - Particle size - Phosphate fertilizers - Phosphorus - Potash - Potassium chloride - Smoke - Testing - Urea Uncontrolled terms:Agricultural fertilization - Ammonia volatilization - Chemical fertilizers - Fixation rates - Phosphorus fixation - Potassium dihydrogen phosphate - Scientific basis - Test method Classification code:452.3 Industrial Wastes - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes Numerical data indexing:Mass 2.25e-03kg, Mass 4.00e-04kg DOI:10.13227/j.hjkx.202006068 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804508 Title:Sediment Pollution Characteristics and Dredging in the Nanfei River Estuary, Chaohu Lake Title of translation:巢湖南淝河河口底泥污染特征及疏浚决策 Authors:Yang, Pan (1, 2); Yang, Chun-Hui (1, 2); Ma, Xin-Yu (1, 2); Yin, Hong-Bin (1) Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Yin, Hong-Bin(hbyin@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:712-722 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To clarify the endogenous pollution characteristics of sediments in the Nanfei River estuary, Chaohu Lake, and provide a theoretical basis for the dredging works, the organic index, pollution index, and potential ecological risk were determined. The results show that the average total nitrogen (TN), total phosphorus (TP), and organic matter (OM) content of the sediment was 1 461 mg•kg-1, 438 mg•kg-1, and 1.77%, respectively, showing enrichment in the surface layer (0-10 cm). The nutrient pollution status and TP pollution index show that the organic pollution level was moderate and the TP pollution was severe. Furthermore, the pollution risk gradually reduced with sediment depth, representing a low risk at depths below 30 cm. Static release results showed that the average release fluxes of NH4+-N and TP in the sediment were 8.04 mg•(m2•d)-1 and 0.19 mg•(m2•d)-1, respectively, and showed highest release potentials consistent with areas of sediment nutrient pollution. Except for Cr and Ni, the concentrations of six heavy metals were higher than the soil background values for Anhui Province, and the concentrations of Hg and Cd far exceeded the standards. According to the assessment of potential ecological risk from heavy metals, the 0-20 cm sediments present a high level of risk and sediments below 30 cm have a low level of risk. Heavy metal leaching toxicity indicated that the risk of heavy metal release after dredging is low and non-hazardous. These results were used to determine the key dredging area (3.93 km2) and depth (30 cm) for the Nanfei River estuary, providing an important basis for future dredging activities.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:River pollution Controlled terms:Dredging - Estuaries - Heavy metals - Lakes - Marine pollution - Nutrients - Risk assessment - Rivers - Sediments Uncontrolled terms:Background value - Heavy metal release - Nutrient pollution - Organic pollution - Potential ecological risk - Sediment nutrients - Sediment pollution - Total phosphorus Classification code:407.2 Waterways - 453 Water Pollution - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention Numerical data indexing:Area 3.93e+06m2, Percentage 1.77e+00%, Size 0.00e+00m to 1.00e-01m, Size 0.00e+00m to 2.00e-01m, Size 3.00e-01m DOI:10.13227/j.hjkx.202005320 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688831 Title:Heavy Pollution Episode in Tianjin Based on UAV Meteorological Sounding and Numerical Model Title of translation:基于无人机探空和数值模拟天津一次重污染过程分析 Authors:Yang, Xu (1, 2); Cai, Zi-Ying (1, 2); Han, Su-Qin (1, 2); Shi, Jing (3); Tang, Ying-Xiao (1, 2); Jiang, Ming (3); Qiu, Xiao-Bin (4) Author affiliation:(1) Tianjin Environmental Meteorological Center, Tianjin; 300074, China; (2) CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research, Tianjin; 300074, China; (3) Tianjin Meteorological Observation Center, Tianjin; 300074, China; (4) Tianjin Institute of Meteorological Science, Tianjin; 300074, China Corresponding author:Cai, Zi-Ying(120078030@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:9-18 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Pollution occurs in the boundary layer, and the thermal and dynamic vertical structure of the boundary layer has a significant influence on the formation of heavy pollution episodes. Based on unmanned aerial vehicle (UAV) sounding, ground-based remote sensing and numerical modeling, this paper analyzes the vertical structure of the boundary layer and the causes of pollution during the heavy pollution episode in Tianjin from January 10 to 15, 2019, with a view to strengthening the understanding of the influence law of boundary layer processes on heavy pollution in northern coastal cities and improving the accuracy of weather forecasts and heavy pollution warnings. The results show that atmospheric temperature stratification had a significant influence on the formation, persistence, and dissipation of heavy pollution episodes. During an episode, accompanied by the development and dissipation of the inversion layer, a high PM2.5 concentration area developed to the upper atmosphere with a height of over 300 m in the daytime and compressed to the ground at night with a height about 100 m. When fog appeared and continued in the daytime, the vertical structure characteristics of the boundary layer changed. A temperature inversion above the fog restrained the diffusion of pollutants to the upper air and made the contribution of turbulence vertical mixing process decrease significantly in the daytime, leading to the persistence and development of heavy pollution near the surface. Regional pollution transport accounted for 66.6% during the episode, which was closely related to regional pollution transport. Regional pollution transport mainly appeared at the top of the boundary layer and above the fog inversion layer where high wind speeds occurred. Pollutants were transported to the ground by a sinking motion as the boundary layer and fog height changed. This is how regional pollution transport occurred when Tianjin was controlled by a weak high pressure field in the north. The vertical structure of the boundary layer also affected the improvement of air quality by cold air. The strong temperature inversion at the top of the fog resulted in the failure of the cold air to transmit to the ground through turbulent shear stress in the S3 stage. There was an obvious difference in wind speed between the upper and lower air. The influence of cold air on the ground was delayed, and the effect of it was weakened. Thus, the heavy pollution episode could not be alleviated completely.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Atmospheric thermodynamics Controlled terms:Air - Air quality - Antennas - Atmospheric temperature - Boundary layers - Climatology - Fog - Inversion layers - Numerical models - Remote sensing - Shear stress - Thermal pollution - Unmanned aerial vehicles (UAV) - Upper atmosphere - Weather forecasting - Wind Uncontrolled terms:Boundary layer process - Ground-based remote sensing - PM2.5 concentration - Pollution episodes - Temperature inversions - Temperature stratification - Turbulent shear stress - Vertical structures Classification code:443 Meteorology - 443.1 Atmospheric Properties - 451.2 Air Pollution Control - 652.1 Aircraft, General - 804 Chemical Products Generally - 921 Mathematics - 931 Classical Physics; Quantum Theory; Relativity - 932 High Energy Physics; Nuclear Physics; Plasma Physics Numerical data indexing:Percentage 6.66e+01%, Size 1.00e+02m, Size 3.00e+02m DOI:10.13227/j.hjkx.202007068 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582408 Title:First Extended Anaerobic Phase Enhanced Nitrogen and Phosphorus Removal by Aerobic Granular Sludge Under Intermittent Gradient Aeration Title of translation:间歇梯度曝气下首段延时厌氧强化好氧颗粒污泥脱氮除磷 Authors:Zhang, Yu-Jun (1); Li, Dong (1); Wang, Xin-Xin (1); Zhang, Fu-Guo (2); Zhang, Jie (1, 3) Author affiliation:(1) Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China; (2) China Northeast Municipal Engineering Design & Research Institute Co., Ltd., Changchun; 130000, China; (3) State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin; 150090, China Corresponding author:Li, Dong(lidong2006@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3405-3412 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, a SBR reactor was selected to explore the effect of nitrogen and phosphorus removal by aerobic granular sludge under different initial anaerobic time using intermittent gradient aeration (decreasing dissolved oxygen concentration in each aeration section) and actual domestic wastewater with low C/N ratio as the influent matrix. The results showed that the initial anaerobic stage of intermittent gradient aeration increased from 50 min to 90 min, which increased the carbon source reserves in granular sludge. This improved delayed anaerobic condition led to the improvement of nitrogen and phosphorus removal efficiency of granular sludge. When delayed to 70 and 90 min, the removal efficiency of COD, TN, and TP reached 84.74%, 70.05%, and 89.7% and 86.65%, 78.81%, and 85.5%, respectively. However, after the first anaerobic phase time was increased to 110 min, the sludge loss was more severe owing to the disintegration of some cells, leading to a decrease in internal carbon source reserves by about 13.6%. Owing to this, the pollutant removal efficiency decreased. In the process of prolonging the first anaerobic phase time from 50 min to 90 min, the content of PS in LB-EPS changed minimally; when it was delayed to 110 min, the content of PS increased to about 7.18 mg•g-1, and the PN content increased to about 5.56 mg•g-1. The contents of PN and PS in TB-EPS were stable, which indicated that the effect of internal carbon storage on LB-EPS was greater than that of TB-EPS, and the decrease in sludge settling performance was closely related to the increase in PS content in LB-EPS. The proportion of DPAOs in granular sludge increased as the first anaerobic phase time increased, and the proportion of DPAOs reached 51.5% when the first anaerobic phase time was 70 min.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Nitrogen removal Controlled terms:Disintegration - Dissolved oxygen - Efficiency - Granular materials - Nitrogen - Phosphorus Uncontrolled terms:Aerobic granular sludges - Anaerobic conditions - Dissolved oxygen concentrations - Domestic wastewater - Nitrogen and phosphorus removal - Pollutant removal efficiency - Removal efficiencies - Sludge settling Classification code:804 Chemical Products Generally - 913.1 Production Engineering - 951 Materials Science Numerical data indexing:Percentage 1.36e+01%, Percentage 5.15e+01%, Percentage 7.00e+01%, Percentage 7.88e+01%, Percentage 8.47e+01%, Percentage 8.55e+01%, Percentage 8.67e+01%, Percentage 8.97e+01%, Time 3.00e+03s to 5.40e+03s, Time 4.20e+03s, Time 5.40e+03s, Time 6.60e+03s DOI:10.13227/j.hjkx.202011124 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404528 Title:Mechanisms Summary and Potential Analysis of EPS as a Flame Retardant Title of translation:污泥EPS作为阻燃剂的机制归纳与潜力分析 Authors:Hao, Xiao-Di (1); Zhao, Zi-Cheng (1); Li, Ji (1); Shi, Chen (1); Wu, Yuan-Yuan (1) Author affiliation:(1) Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2583-2594 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
High value-added extracellular polymer substance (EPS) extracted from excess sludge can effectively promote resource recovery from wastewater. EPS can replace traditional alginate in the food, medicine, textile, printing and dyeing, papermaking, and household chemicals industries. Moreover, its unique performance as a flame retardant has shown attractive potential for aircraft including space shuttles. This is due to the complicated chemical structure and composition of EPS, the excellent compatibility, adhesion, and other advantages of which could yield environmental-friendly flame-retardants. Therefore, a systematic analysis and summary on the mechanisms of EPS as flame retardants is of significance for future application. On the basis of the advantages and disadvantages of other fire-resistant materials on the market, the characteristics and application potential of EPS are analyzed and summarized. Second, the possible fire-resistant mechanisms of phosphorus and alginate-like substance (ALE) in EPS are revealed, and the synergistic flame-retardant effects of extracellular-proteins are also elucidated. Based on this, the flame-retardant characteristics of EPS are comprehensively evaluated and compared with other fire-resistant materials. To further improving the performance of EPS as a flame-retardant material, some modification strategies are proposed, such as increasing their phosphorus content, purifying and enhancing the content of ALE in EPS, and optimizing the modification methods of EPS on their substrates.
© 2021, Science Press. All right reserved. Number of references:72 Main heading:Flame retardants Controlled terms:Chemical contamination - Fire resistance - Fireproofing - Phosphorus - Space shuttles - Textile industry Uncontrolled terms:Environmental-friendly - Extracellular polymer substance - Extracellular proteins - Fire resistant materials - Modification methods - Phosphorus contents - Printing and dyeing - Synergistic flame retardants Classification code:656.1 Space Flight - 804 Chemical Products Generally - 819.6 Textile Mills, Machinery and Equipment - 822.3 Food Products - 914.2 Fires and Fire Protection DOI:10.13227/j.hjkx.202010178 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404704 Title:Nitrogen Distribution and Inorganic Nitrogen Diffusion Flux in a Shallow Lake During the Low Temperature Period: A Case Study of the Baiyangdian Lake Title of translation:低温期浅水湖泊氮的分布及无机氮扩散通量:以白洋淀为例 Authors:Wen, Yan (1, 2); Shan, Bao-Qing (1, 2); Zhang, Wen-Qiang (1, 2) Author affiliation:(1) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding authors:Shan, Bao-Qing(bqshan@rcees.ac.cn); Zhang, Wen-Qiang(wqzhang@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2839-2847 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The distribution of inorganic nitrogen across the sediment-water interface in Baiyangdian Lake, the largest shallow lake in North China, was examined during the low temperature period. Furthermore, the influence of inorganic nitrogen diffusion flux in sediment porewater on the overlying water quality was analyzed. The results showed that the mean TN concentration in the surface water ranged from 4.83 to 8.23 mg•L-1, the mean NH4+-N concentration ranged from 0.21 to 0.34 mg•L-1, and the mean NO3--N concentration ranged from 0.01 to 2.75 mg•L-1. TN exceeds the Class V water quality standard for surface water, indicating serious pollution. The mean TN content of the sediments ranged from 681 to 4 365 mg•kg-1, of which TON was the main form of TN, accounting for 61.6%-93.1%. NH4+-N was the main form of TIN, with a mean content ranging from 28.9 to 116.3 mg•kg-1, and a mean NO3--N content of between 5.2 and 23.7 mg•kg-1, which is relatively low. The NH4+-N concentration in the porewater was 3 to 16 times that of the overlying water, showing a gradual accumulation trend. The diffusion flux ranges of NH4+-N, NO3--N, and NO2--N across the sediment-water interface were -0.55-4.09, -1.44-3.67, and -0.88-0.04 mg•(m2•d)-1, respectively. There was still a potential release risk during the low temperature period. A large amount of NH4+-N accumulated in the sediments during the low-temperature period, which may affect the quality of the overlying water after the temperature rises. Therefore, studying the distribution of nitrogen across the sediment-water interface, and the risk of internal release of inorganic nitrogen during the low temperature period, is of great significance for improving water quality in Baiyangdian Lake and understanding the internal nitrogen pollution of shallow lakes.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Sediments Controlled terms:Diffusion - Lake pollution - Lakes - Nitrogen - River pollution - Temperature - Water quality Uncontrolled terms:Baiyangdian lakes - Inorganic nitrogen - Nitrogen distribution - Nitrogen pollution - Sediment porewater - Sediment water interface - Temperature rise - Water quality standard Classification code:445.2 Water Analysis - 453 Water Pollution - 483 Soil Mechanics and Foundations - 641.1 Thermodynamics - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.00e-05kg/m3 to 2.75e-03kg/m3, Mass_Density 2.10e-04kg/m3 to 3.40e-04kg/m3, Mass_Density 4.83e-03kg/m3 to 8.23e-03kg/m3, Percentage 6.16e+01% to 9.31e+01% DOI:10.13227/j.hjkx.202011122 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247647 Title:Aerobic Granular Sludge Operation and Nutrient Removal Mechanism from Domestic Sewage in an Anaerobic/Aerobic Alternating Continuous Flow System Title of translation:缺氧/好氧交替连续流的生活污水好氧颗粒污泥运行及污染物去除机制 Authors:Li, Dong (1); Yang, Jing-Wei (1); Li, Yue (1); Li, Shuai (1, 2); Zhang, Shi-Rui (1); Wang, Wen-Qiang (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2385-2395 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Mature aerobic granular sludge was inoculated at room temperature in an anaerobic/aerobic alternating continuous flow system. The system consisted of two independent anaerobic and aerobic tanks. Actual domestic sewage was used as the influent to explore the influence of the gas intensity and hydraulic residence time on the continuous flow system. The results revealed that the conditions of a reflux ratio of 2, lower aeration intensity (0.6 mL•min-1), and proper hydraulic residence time (9 h) were more conducive to the removal of pollutants. Under such conditions, the average removal rate of TP was 80.43%, the average removal rate of TN was 83.6%, the average removal rate of COD was 90.39%, the sludge concentration was approximately 2 100 mg•L-1, the sludge volume index was maintained below 50 mL•g-1, and the particle size was 700-800 nm. The EEM-PARAFAC model was used to characterize and analyze the EPS at different stages. The results revealed that changing the parameters could change the composition of EPS. The hydraulic residence time had a greater impact on the continuous flow system than the aeration intensity. In addition, a preliminary conceptual reaction process model in the anaerobic/aerobic alternating continuous flow system was built using high-throughput pyrosequencing and phylogenetic assignment. Eleven major functional bacteria related to nitrogen and phosphorus removal were found in the system.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Nitrogen removal Controlled terms:Granular materials - Particle size - Particle size analysis - Sewage Uncontrolled terms:Aerobic granular sludges - Continuous-flow system - Functional bacteria - Hydraulic residence time - Nitrogen and phosphorus removal - Removal rate of cods - Sludge concentration - Sludge volume index Classification code:452.1 Sewage - 951 Materials Science Numerical data indexing:Mass_Density 2.10e+00kg/m3 to 2.20e-02kg/m3, Percentage 8.04e+01%, Percentage 8.36e+01%, Percentage 9.04e+01%, Size 7.00e-07m to 8.00e-07m, Specific_Volume 5.00e-02m3/kg to 2.20e-02m3/kg, Time 3.24e+04s DOI:10.13227/j.hjkx.202009206 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804509 Title:Occurrence of Antibiotics and Antibiotic Resistance Genes in Representative Drinking Water Resources in Jiangsu Province Title of translation:江苏省代表性水源地抗生素及抗性基因赋存现状 Authors:Wang, Long-Fei (1); Cheng, Yi-Qun (1); Hu, Xiao-Dong (2); Zhu, Jin-Xin (1); Li, Yi (1) Author affiliation:(1) Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing; 210098, China; (2) Jiangsu Institute of Water Resources and Hydropower Research, Nanjing; 210017, China Corresponding author:Li, Yi(envly@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:749-760 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Emerging contaminants including antibiotics and antibiotic resistance genes (ARGs) have been frequently detected in drinking water resources. In this study, the occurrence of antibiotics and ARGs in various environmental matrices in representative drinking water sources in Jiangsu Province and their influencing factors were explored. Five representative drinking water sources in northern, central, and southern Jiangsu were selected. Water, surface sediment, and epilithic biofilm samples were harvested near the water intakes of each water resource in December 2018 and June 2019. The concentrations and abundances of ten antibiotics, one integrase gene intl1, and seven common ARGs were measured. The results suggest that the concentrations of the target antibiotics and ARGs are relatively low compared to previously reported data in China and elsewhere in the world. The target antibiotics were detected in all of the water sources. The concentrations of sulfonamides in the water, surface sediment, and epilithic biofilm ranged from not found (NF) to 37.4 ng•L-1, NF to 47.3 ng•g-1, and NF to 3 759.1 ng•g-1, respectively; the concentrations of quinolones in three matrices were NF-5.3 ng•L-1, 0.4-32.5 ng•g-1, and NF-4 220.9 ng•g-1, respectively. The detection rates of the ARGs including sul1, sul2, tetW, and tetQ were 100%, among which the sulfonamides sul1 and sul2 showed the highest abundance. The absolute abundances of sul1 in the three matrices were 2.48×106 copies•L-1, 3.54×107 copies•g-1, and 1.44×109 copies•g-1, respectively. The abundances of ARGs in the sediments and epilithic biofilms were comparable, and were much higher than in the water body. The phyla Bacteroidetes, Proteobacteris, Firmicutes, Verrucobacteria, and Actinomycetes have proven potential hosts for ARGs and might play an important role in the transmission and diffusion of resistance genes. This study offers baseline information on the presence of antibiotics and ARGs in the drinking water sources of Jiangsu Province, providing a significant theoretical basis for ARGs pollution control and safety guidelines for drinking water resources.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Potable water Controlled terms:Amides - Antibiotics - Biofilms - Genes - Sulfur compounds - Surface waters - Surficial sediments - Water pollution - Water pollution control Uncontrolled terms:Antibiotic resistance genes - Drinking water sources - Emerging contaminant - Environmental matrixes - Epilithic biofilms - Jiangsu province - Safety guidelines - Surface sediments Classification code:444 Water Resources - 444.1 Surface Water - 453 Water Pollution - 453.2 Water Pollution Control - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 462.5 Biomaterials (including synthetics) - 483 Soil Mechanics and Foundations - 804.1 Organic Compounds Numerical data indexing:Mass_Density 3.74e-08kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02% DOI:10.13227/j.hjkx.202006248 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688823 Title:Urban Micro-Scale Thermal Environment Simulation Supported by UAV Thermal Infrared Data Title of translation:无人机热红外支持下的城市微尺度热环境模拟 Authors:Yang, Shao-Qi (1); Feng, Li (1); Tian, Hui-Hui (1); Liu, Yan-Xia (1) Author affiliation:(1) Department of Geography Information Science, College of Hydrology and Water Resources, Hohai University, Nanjing; 211100, China Corresponding author:Feng, Li(erma1014@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:492-500 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With further improvements to meet social requirements for healthy and comfortable living, the research of micro-scale thermal environments has been received increasing attention. The key to micro-scale thermal environment study is the underlying surface temperature field simulation, which requires high precision results. Taking a typical area of the Jiangning District, Nanjing City, as a study area, this study used a UAV equipped with a thermal infrared imager to obtain surface temperature data in summer and autumn because of the limitation of the traditional ground measurements. Then, the numerical simulation software of ENVI-met and PALM-4U were utilized to conduct the surface temperature filed simulation. The simulation results were further analyzed combined with measured data. The modeling results indicated that the numerical simulation has high spatial accuracy, which can be applied to the study of the urban micro-thermal environment. Furthermore, the simulation effect of the model on the artificial surface is better than that of the natural surface, and the simulation effect of the open surface is better than that of the non-open surface. The study also found that the simulation effect of ENVI-met under the influence of occlusion was better than that of PALM-4U. The vegetation occlusion PALM-4U was less effective than that of ENVI-met, although both models correctly predicted the ground temperature under the occlusion of buildings. The overall conclusion indicates that the applicability of ENVI-met is superior to that of PLAM-4U for urban micro-thermal environment simulation. The study can provide a reference for the high-resolution remote sensing research of urban micro-scale thermal environments.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Computer software Controlled terms:Atmospheric temperature - Infrared radiation - Numerical models - Remote sensing - Surface properties - Unmanned aerial vehicles (UAV) Uncontrolled terms:Artificial surfaces - Ground measurements - High resolution remote sensing - Numerical simulation software - Surface temperatures - Thermal environment - Thermal infrared data - Thermal infrared imager Classification code:443.1 Atmospheric Properties - 652.1 Aircraft, General - 723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 921 Mathematics - 951 Materials Science DOI:10.13227/j.hjkx.202005254 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126219 Title:Influencing Factors of Cadmium Bioaccumulation Factor in Crops Title of translation:影响不同农作物镉富集系数的土壤因素 Authors:Chen, Jie (1); Wang, Juan (1); Wang, Yi-Wen (1); Yao, Qi-Xing (1); Su, De-Chun (1) Author affiliation:(1) Beijing Key Laboratory of Farmland Pollution Prevention Control and Remediation, College of Resource and Environmental Sciences, China Agricultural University, Beijing; 100193, China Corresponding author:Su, De-Chun(dcsu@cau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2031-2039 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Cd bioaccumulation factor (BCF) of crops is affected by many aspects. In order to clarify the differences in the Cd bioaccumulation factor characteristics of different crops under field conditions and the influence of soil properties, point-to-point samples of soil and crop grains were collected during crop harvesting on plots with varying pollution levels in the primary production areas of rice, wheat, and maize in China. The characteristics of the Cd bioaccumulation factors of rice, wheat, summer maize, and spring maize and the effects of soil properties on the Cd bioaccumulation factors of different crops were studied, and the quantitative relationship between the Cd bioaccumulation factors and soil properties was established through multiple regression equations. The results revealed that the average BCF values of Cd in rice, wheat, summer maize, and spring maize were 0.915, 0.155, 0.113, and 0.102, respectively, with the Cd content in the field soil of 0.15-2.66 mg•kg-1. Rice is significantly higher than wheat and maize, and spring maize has the lowest Cd bioaccumulation factor. The Cd content in the soil is extremely negatively correlated with the BCF of wheat, summer maize, and spring maize. The relationship between soil organic matter (SOM) and the BCF of wheat and summer maize demonstrated a significant negative correlation. The soil pH and cation exchange capacity (CEC) also affect the BCF of crops. Introducing the soil Cd content, pH, SOM, CEC, and other factors, the Cd bioaccumulation factor prediction equations of rice, wheat, summer maize, and spring maize were established. The correlation coefficients of the BCF prediction equations for rice, wheat, summer maize, and spring maize are 0.423*, 0.796**, 0.826**, and 0.551**, respectively. The above models reached significant or extremely significant levels, which can better predict the BCF value of different crops under varying soil conditions.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Cadmium Controlled terms:Bioaccumulation - Biochemistry - Crops - Forecasting - Soils - Springs (components) Uncontrolled terms:Bioaccumulation factor - Cation exchange capacities - Correlation coefficient - Multiple regression equations - Negative correlation - Prediction equations - Primary production - Soil organic matters Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 601.2 Machine Components - 801.2 Biochemistry - 821.4 Agricultural Products DOI:10.13227/j.hjkx.202008161 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247638 Title:Analysis of Characteristics and Causes of a Typical Haze Pollution in Beijing in the Winter of 2019 Title of translation:北京2019年冬季一次典型霾污染特征与成因分析 Authors:Lian, Han-Yang (1); Yang, Xin (2); Zhang, Pu (1); Chen, Yi-Zhen (2); Yang, Xiao-Yang (2); Zhao, Yu-Xi (2); He, You-Jiang (2); Zhao, Dan-Ting (3) Author affiliation:(1) College of Urban and Environmental Sciences, Northwest University, Xi'an; 710127, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Shandong Environmental Protection Science Research and Design Institute Co. Ltd., Ji'nan; 250013, China Corresponding author:Yang, Xin(yangxin@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2121-2132 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to study the pollution characteristics and causes of winter haze pollution in Beijing, a typical PM2.5 pollution process in Beijing in December 2019 was used as the analysis object using aerosol vertical detection data, boundary layer meteorological field and near-ground turbulence data, and the difference in haze. The characteristics of the pollution stage and the evolution of the physical and chemical characteristics of the boundary layer were comprehensively analyzed. The results showed that ① the pollution process in Beijing during the observation period lasted 5 d and experienced two generations and eliminations. The maximum hourly PM2.5 concentration was 220 μg•m-3 and the time exceeding the severe pollution standard was 64 h, thereby accounting for 53% of the total time. ② The aerosol optical properties and meteorological field observation data showed that the pollution originated from the regional transmission of aerosols and water vapor on the surface of the southwest urban agglomeration in Beijing, which accounted for 48% of the total pollution transmission, followed by a stable high-altitude situation and ground pressure field configuration. The near-surface layer maintained weak southerly winds (wind speed: 1-2 m•s-1), a strong inversion temperature close to the ground [0.8 K•(100 m)-1], high humidity (relative humidity above 80%), and other unfavorable diffusion weather conditions, thereby promoting the accumulation of pollutants and the conversion of moisture absorption. Superimposing local pollution emissions were the main reasons for the maintenance of haze days. In addition, the near-ground extinction coefficient increased from 0.070 km-1 to 5.954 km-1, and the depolarization ratio decreased from 0.05 to 0.02 during the two pollution generation and disappearance processes, thereby indicating that the spherical characteristics of aerosols gradually became significant as the pollution increased. ③ The analysis of the turbulence observation data showed that the characteristic quantities of different pollution stages were significantly different and negatively correlated with the pollutant concentration. Before the occurrence of heavy pollution, the turbulence statistics (turbulence intensity, friction velocity, and turbulent kinetic energy) suddenly decreased from high values (the hourly variation rate was 77%, thereby far exceeding the daily fluctuation of 33%), and the turbulence intensity responded first. During the pollution accumulation stage, the friction velocity (0.04-0.21 m•s-1), turbulence intensity (average: 0.678 m2•s-2), and turbulence energy (average: 0.643 m2•s-2) were maintained at a low level, and the bottom atmosphere had a poor mixing and diffusion ability, which is important for continuous pollution accumulation. Four hours before the end of the pollution event, the turbulence intensity again showed a sharp increase (increment of more than one order of magnitude); thus, the turbulence intensity can be used as a predictive indicator of the occurrence and end of a heavy pollution event, and the response time is the same as the continuous turbulence intensity after the turbulence peak. In addition, the sensible heat fluxes on sunny days and haze days were both transported from the ground to the atmosphere, and showed clear daily single-peak changes. The sensible heat flux on haze days (20 W•m-2) was smaller than that on sunny days (60 W•m-2). The latent heat flux was approximately 0 W•m-2 in the whole process. ④ There was a feedback effect between the meteorological conditions of the pollution layer and the boundary layer. On the one hand, unfavorable diffusion of the meteorological conditions was conducive to the accumulation of pollution. On the other hand, the aerosol layer and water vapor cooling effect that accumulated near the ground were worse than the night cooling radiation on the inversion layer The contribution was greater, thereby further inhibiting the development of turbulent motion and ultimately resulting in increased pollution.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Air pollution Controlled terms:Aerosols - Atmospheric thermodynamics - Boundary layers - Chemical analysis - Diffusion - Friction - Heat flux - Kinetic energy - Kinetics - Object detection - Optical properties - Pollution control - Transmissions - Turbulence - Water pollution - Water vapor - Wind Uncontrolled terms:Aerosol optical property - Extinction coefficients - Meteorological condition - Near ground turbulence - Physical and chemical characteristics - Pollutant concentration - Predictive indicators - Turbulent kinetic energy Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 453 Water Pollution - 602.2 Mechanical Transmissions - 641.2 Heat Transfer - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 931 Classical Physics; Quantum Theory; Relativity Numerical data indexing:Percentage 3.30e+01%, Percentage 4.80e+01%, Percentage 5.30e+01%, Percentage 7.70e+01%, Percentage 8.00e+01%, Size 1.00e+02m, Surface_Power_Density 0.00e+00W/m2 to 2.20e+01W/m2, Surface_Power_Density 2.00e+01W/m2 to 2.20e+01W/m2, Surface_Power_Density 6.00e+01W/m2 to 2.20e+01W/m2, Time 2.30e+05s, Velocity 1.00e+00m/s to 2.00e+00m/s, Velocity 4.00e-02m/s to 2.10e-01m/s DOI:10.13227/j.hjkx.202008258 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003303 Title:Cd Accumulation Characteristics in Different Populations of Hylotelephium spectabile Under Salt Stress Title of translation:盐胁迫下八宝景天不同生态型对土壤中Cd积累特征 Authors:Guo, Jun-Mei (1, 2); Yang, Jun-Xing (1, 2); Yang, Jun (1, 2); Wan, Xiao-Ming (1, 2); Meng, Xiao-Fei (1, 2); Chen, Tong-Bin (1, 2); He, Meng-Ke (1, 2, 3); Zhou, Xiao-Yong (4); Xu, Tie-Bing (5) Author affiliation:(1) Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100083, China; (4) Beijing Remediation Environmental Restoration Co., Ltd., Beijing; 100015, China; (5) Hebei Provincial Academy of Environmental Sciences, Shijiazhuang; 050051, China Corresponding author:Yang, Jun-Xing(yangajx@igsnrr.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1177-1184 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A pot experiment was conducted to investigate the growth response and Cd accumulation characteristics among different populations of Hylotelephium spectabile in Cd-contaminated cinnamon soil (2.22 mg•kg-1) with the addition of different concentrations of NaCl. Results showed that the biomasses and Cd concentrations of H. spectabile showed significant differences among different populations under Cd alone or Cd-salt combined stress. Moreover, salt stress aggravated the growth inhibition of H. spectabile and the Cd concentrations in different H. spectabile populations showed a declining trend, which may be related to the salt-derived pH increase leading to a decrease in Cd bioavailability. In addition, the growth and Cd absorption responses of H. spectabile under salt stress were significantly different in the different populations. The shoot biomasses of the LN population were significantly higher than in other populations under different treatment, and showed no significant decrease with the addition of 1% NaCl when compared with the control treatment and the tolerance index remained 0.91. At the same time, the shoot Cd concentration of the LN population was significantly higher than in other populations under different treatments. The result may be attributed to the Cd accumulation and detoxification mechanisms in LN are prior than other populations that may also have important physiological mechanisms for tolerance of salt stress. In summary, although Cd uptake in H. spectabile decreased with salt stress, there were significant differences among different populations. LN populations accumulated 84.4 μg•plant-1 Cd in shoots with 2% NaCl addition, which was 48.4%-89.3% higher than in other populations. Therefore, H. spectabile, especially LN populations, is a good candidate for phytoremediation of Cd-contaminated saline soil.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Population statistics Controlled terms:Biochemistry - Bioremediation - Cadmium - Detoxification - Plants (botany) - Sodium chloride - Soil pollution Uncontrolled terms:Cd concentrations - Control treatments - Detoxification mechanism - Different treatments - Growth inhibition - Physiological mechanisms - Phytoremediation - Tolerance indices Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry Numerical data indexing:Percentage 1.00e+00%, Percentage 2.00e+00%, Percentage 4.84e+01% to 8.93e+01% DOI:10.13227/j.hjkx.202010128 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779589 Title:Seasonal Variation and Sources Identification of Dissolved Sulfate in a Typical Karst Subterranean Stream Basin Using Sulfur and Oxygen Isotopes Title of translation:硫氧同位素解析典型岩溶地下河流域硫酸盐季节变化特征和来源 Authors:Ren, Kun (1, 2); Pan, Xiao-Dong (1); Lan, Gan-Jiang (1); Peng, Cong (1); Liang, Jia-Peng (1); Zeng, Jie (1) Author affiliation:(1) Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Guilin; 541004, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4267-4274 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Karst water, which provides approximately 25% of the world's drinking water, is especially vulnerable to anthropogenic pollutants. To determine the variations between high and low flow periods and the sources of dissolved sulfate (SO42-) in small karst basins, SO42- concentrations, stable sulfur and oxygen isotopes (δ34S-SO4 and δ18O-SO4), and oxygen isotopes of water (δ18O-H2O) were investigated in surface and groundwaters, during the high and low flow seasons, within the Babu subterranean stream basin. Analysis showed that: ① the water samples that were directly impacted by acid mine drainage exhibited high SO42- concentrations (≥250 mg•L-1) and significant seasonal variation, while the seasonal variation of non-AMD-impacted water with low SO42- concentrations was not significant. ② During the high flow season, the mean δ34S-SO4 and δ18O-SO4 values of surface water were -10.5‰ and 4.7‰, respectively, and -11.5‰ and 1.3‰ during the low flow period; the mean values of δ34S-SO4 and δ18O-SO4 in groundwater samples were -2.9‰ and 7.1‰ during the high flow period, respectively, and -3.2‰ and 6.2‰ during the low flow period. Both surface and groundwater samples exhibited higher δ34S-SO4 and δ18O-SO4 values during the high flow period than during the low flow period. ③ The values of δ34S-SO4 in the surface and groundwater samples were relatively stable, indicating that the sources of SO42- at specific sampling sites were stable.④ The main sources of SO42- in surface and groundwaters were rain, sulfide, and gypsum, accounting for 13%, 40%, and 47%, respectively, of SO42- in samples taken from the basin outlet during the high flow season, and 18%, 39%, and 43%, respectively, in samples obtained during the low flow season.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Dissolved oxygen Controlled terms:Groundwater - Isotopes - Landforms - Potable water - Sulfur - Sulfur compounds - Surface waters - Water pollution Uncontrolled terms:Acid mine drainage - Anthropogenic pollutants - Karst basin - Oxygen isotopes - Sampling site - Seasonal variation - Sources identifications - Water samples Classification code:444 Water Resources - 453 Water Pollution - 481.1 Geology - 804 Chemical Products Generally Numerical data indexing:Percentage 1.30e+01%, Percentage 1.80e+01%, Percentage 2.50e+01%, Percentage 3.90e+01%, Percentage 4.00e+01%, Percentage 4.30e+01%, Percentage 4.70e+01% DOI:10.13227/j.hjkx.202101225 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404965 Title:Analysis of Spatial-Temporal Variation Characteristics of Potential Non-point Source Pollution Risks in the Upper Beiyun River Basin Using Different Weighting Methods Title of translation:基于不同赋权方法的北运河上游潜在非点源污染风险时空变化特征分析 Authors:Li, Hua-Lin (1); Zhang, Jian-Jun (1); Zhang, Yao-Fang (2); Chang, Guo-Liang (2); Shi, Di-Di (1); Xu, Wen-Jing (1); Song, Zhuo-Yuan (1); Yu, Pei-Dan (1); Zhang, Shou-Hong (1, 3) Author affiliation:(1) School of Soil and Water Conservation, Beijing Forestry University, Beijing; 100083, China; (2) Beijing Water Science Technology Institute, Beijing; 100048, China; (3) Beijing Engineering Research Center of Soil and Water Conservation, Beijing; 100083, China Corresponding author:Zhang, Shou-Hong(zhangs@bjfu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2796-2809 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Non-point source pollution has become an important factor affecting the aquatic ecological environment and human health, and the analysis of spatial-temporal variations in non-point source pollution risks is an important prerequisite for pollution control. Based on land-use and land-cover data from 1980 to 2020, the potential non-point source pollution index (PNPI) model was applied in the upper Beiyun River Basin using different weighting methods. The results showed that: ① The potential risk of non-point source pollution is high in the southeast and low in the northwest of the basin. Between 1980 and 2020, the total area of extremely high-risk and high-risk non-point source pollution regions showed a decreasing trend, and the main types of land use for extremely high-risk and high-risk regions gradually evolved from paddy fields, drylands, and orchards to urban and rural residential land; ② The weighting of the land use index determined by the mean-square deviation decision, entropy, coefficient of variation, and expert scoring methods was largest among the three PNPI indices, with average weightings of 0.46, 0.53, 0.45, and 0.48, respectively. However, the weightings for runoff and distance indices determined by different weighting methods were notably different, and the proportions of regions with different levels of non-point source pollution risk also varied; ③ The exponential function method, which describes the relationship between source factors and transport factors by constructing the exponential functions of land use, runoff, and distance indices, provided results that are more consistent with the spatial distribution characteristics of non-point source pollution risk in the basin. The proportions of extremely low-risk and extremely high-risk regions are 54.22% and 6.23%, respectively. These results provide scientific reference for risk analysis and the control of non-point source pollution in this basin.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:River pollution Controlled terms:Exponential functions - Health risks - Land use - Pollution control - Risk analysis - Risk assessment - Runoff - Spatial variables measurement - Watersheds Uncontrolled terms:Coefficient of variation - Distribution characteristics - Ecological environments - Land use and land cover - Mean square deviation - Non-point source pollution - Scientific references - Spatial temporals Classification code:403 Urban and Regional Planning and Development - 444.1 Surface Water - 453 Water Pollution - 461.7 Health Care - 914.1 Accidents and Accident Prevention - 921 Mathematics - 922 Statistical Methods - 943.2 Mechanical Variables Measurements Numerical data indexing:Percentage 5.42e+01%, Percentage 6.23e+00% DOI:10.13227/j.hjkx.202010225 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003439 Title:Pollution Characteristics and Chromophore Types of Brown Carbon in Xi'an Title of translation:西安市大气棕碳污染特性及发色团种类 Authors:Chen, Qian (1); Chen, Qing-Cai (1) Author affiliation:(1) College of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an; 710021, China Corresponding author:Chen, Qing-Cai(chenqingcai@sust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1236-1244 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the optical characteristics and chemical composition of atmospheric brown carbon (BrC) in Xi'an, particulate phase and gas phase atmospheric samples were collected using an atmospheric particulate sampler and adsorbent, and the samples were analyzed using an ultraviolet-visible spectrophotometer and a three-dimensional (3D) fluorescence photometer. The absorption and fluorescence properties of BrC were analyzed using the parallel factor analysis (PARAFAC) method to obtain type and compositional information. The results show that at a wavelength of 365 nm, the absorbances of the BrC particulate and the gas phases were (13.8±7.9) Mm-1 and (8.0±3.1) Mm-1, with proportions of 63% and 37%, respectively. No significant correlation was found between the absorbance of the gas and particulate phases. PARAFAC results show that in winter, atmospheric BrC in Xi'an is composed of humic-like and protein-like chromophores, with different proportions in the gas and particulate phases. Humic-like and protein-like chromophores are dominant in the particulate phase (41% and 36%, respectively), while the gas phase mainly contains phenolic chromophores (accounting for 78%). These results reveal that gas phase BrC may be an important factor contributing to positive radiative forcing in the atmosphere as well as an important atmospheric component that participates in atmospheric photochemical reactions.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Particles (particulate matter) Controlled terms:Atmospheric chemistry - Atmospheric radiation - Bromine compounds - Carbon - Chemical analysis - Chromophores - Fluorescence - Gas adsorption - Gases - Photochemical reactions - Proteins Uncontrolled terms:Atmospheric components - Atmospheric particulate - Compositional information - Fluorescence properties - Optical characteristics - Parallel factor analysis - Threedimensional (3-d) - Ultraviolet visible spectrophotometer Classification code:443.1 Atmospheric Properties - 741.1 Light/Optics - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 3.60e+01%, Percentage 3.70e+01%, Percentage 4.10e+01%, Percentage 6.30e+01%, Percentage 7.80e+01%, Size 3.65e-07m DOI:10.13227/j.hjkx.202007119 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651079 Title:Chemical Components and Sources of PM2.5 and Their Evolutive Characteristics in Zhengzhou Title of translation:郑州市PM2.5组分,来源及其演变特征 Authors:Zhao, Xiao-Nan (1, 2); Wang, Shen-Bo (1, 2); Yang, Jie-Ru (1, 2); Ma, Qiu-Hong (3); Liu, Yang (2); Zhang, Rui-Qin (1, 2) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Institute of Environmental Sciences, Zhengzhou University, Zhengzhou; 450001, China; (3) Xiangcheng Ecological Environment Bureau of Zhoukou, Zhoukou; 466000, China Corresponding author:Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3633-3643 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the main sources of PM2.5 and the characteristics of seasonal differences in Zhengzhou, PM2.5 sampling was conducted in 2019 and the concentrations of inorganic water-soluble ions, carbon components, and various elements were analyzed. Results showed that the average mass concentration of PM2.5 in 2019 was (67.0±37.2) μg•m-3 with the highest concentration in winter and the lowest in summer. The main components of PM2.5 were nitrate, ammonium, sulfate, organic matter, crustal matter, and elemental carbon. In spring and autumn, PM2.5 was greatly affected by crustal matter and elemental carbon, and In summer, concentrations were mainly affected by sulfate. In winter, the concentrations of organic matter and nitrate increased significantly, produced by photochemical reactions in summer and aqueous-phase reactions under high humidity in winter. Carbonaceous aerosols were greatly influenced by automobile exhaust emission, coal combustion, and biomass combustion. Source apportionment showed that secondary sources were the greatest contributors in all four seasons, particularly in in winter (56.5%). Among the primary sources, the proportion of dust in spring (15.2%) and autumn (11.4%) was slightly higher, and the contribution of motor vehicle pollution was the largest (12.3%) in summer. In winter, PM2.5was greatly affected by coal combustion (13.2%). From 2014 to 2019, PM2.5 in Zhengzhou increased annually under the influence of secondary sources. The contribution of industrial sources, biomass combustion sources, and coal combustion sources exhibited a downward trend over this period.
© 2021, Science Press. All right reserved. Number of references:55 Main heading:Coal combustion Controlled terms:Biogeochemistry - Carbon - Coal - Nitrates - Organic compounds - Photochemical reactions - Springs (components) - Sulfur compounds Uncontrolled terms:Aqueous phase reactions - Automobile exhaust emissions - Biomass combustion - Carbonaceous aerosol - Chemical component - Mass concentration - Seasonal differences - Source apportionment Classification code:481.2 Geochemistry - 524 Solid Fuels - 601.2 Machine Components - 741.1 Light/Optics - 804 Chemical Products Generally Numerical data indexing:Percentage 1.14e+01%, Percentage 1.23e+01%, Percentage 1.32e+01%, Percentage 1.52e+01%, Percentage 5.65e+01% DOI:10.13227/j.hjkx.202012033 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651094 Title:Foliar Application of L-Cysteine: Effects on the Concentration of Cd and Mineral Elements in Rice Title of translation:叶施L-半胱氨酸对水稻镉和矿质元素含量的影响 Authors:Zhang, Ya-Hui (1, 2); Wang, Chang-Rong (2); Liu, Yue-Min (1); Liu, Ya-Ping (1, 2); Liu, Zhong-Qi (2); Zhang, Chang-Bo (2); Huang, Yong-Chun (2) Author affiliation:(1) School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin; 300384, China; (2) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China Corresponding authors:Wang, Chang-Rong(wangchangrong109@163.com); Huang, Yong-Chun(nylab@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:4045-4052 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To evaluate the feasibility of applying L-cysteine (L-Cys) as a foliar conditioner for Cd reduction in rice, a field experiment was conducted to investigate the concentration of Cd and mineral elements in rice after the foliar application of L-Cys. The variation in Cd distribution and morphology in key rice organs was examined to study the Cd reduction mechanisms of spraying L-Cys on rice. The results showed that foliar application of L-Cys at the rice-flowering stage significantly decreased Cd concentration in grains, in a concentration dependent manner, without inhibiting the accumulation of mineral elements Ca, Mg, K, Mn, and Zn. With a 10 mmol•L-1 L-Cys application, Cd concentration in rice grains decreased by 59.2%, to below 0.2 mg•kg-1, which is the maximum safety limit in China. Foliar application of L-Cys also inhibited Cd accumulation in rice vegetative organs, including rachises, first nodes, neck-panicles, flag leaves, second internodes, second nodes, second leaves, stalks, and roots (58.3%, 56.0%, 62.7%, 67.0%, 59.3%, 61.5%, 60.2%, 54.9%, and 50.3%, respectively). After transfer factor calculation, first nodes were found to be the key organ for Cd blocking in rice. The application of L-Cys increased Cd transfer from flag leaves and second internodes to first nodes (105.4% and 45.8%, respectively), but decreased Cd transfer from first nodes up to neck-panicles (27.5%). In rice first nodes, the concentrations of Cd in the inorganic, water soluble, and residue states were all lower following L-Cys application, and the proportion of residual Cd increased to 94.4%. Therefore, foliar application of L-Cys significantly inhibited Cd transport and accumulation in rice grains, by decreasing the Cd concentrations of various vegetative organs and improving Cd interception in the first nodes. This is a promising way to produce rice with lower Cd concentrations and normal mineral element concentrations in Cd-contaminated paddy fields.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Pollution Controlled terms:Amino acids - Grain (agricultural product) - Minerals - Plants (botany) Uncontrolled terms:Cd concentrations - Concentration-dependent manners - Field experiment - Foliar application - Mineral element - Reduction mechanisms - Transfer Factor - Vegetative organs Classification code:482.2 Minerals - 804.1 Organic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 1.05e+02%, Percentage 2.75e+01%, Percentage 4.58e+01%, Percentage 5.03e+01%, Percentage 5.49e+01%, Percentage 5.60e+01%, Percentage 5.83e+01%, Percentage 5.92e+01%, Percentage 5.93e+01%, Percentage 6.02e+01%, Percentage 6.15e+01%, Percentage 6.27e+01%, Percentage 6.70e+01%, Percentage 9.44e+01% DOI:10.13227/j.hjkx.202101092 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945239 Title:Diversity of Zooplankton and Niche Characteristics of Keystone Species in the Weihe River Based on eDNA Title of translation:基于eDNA技术的渭河浮游动物多样性及关键种生态位特征 Authors:Liang, Dong (1, 2); Xia, Jun (1, 2, 3); Song, Jin-Xi (1, 2); Chang, Jian-Bo (3); Wu, Qiong (1, 2); Cheng, Dan-Dong (1, 2); Zhang, Yi-Xuan (1, 2); Kong, Fei-He (1, 2); Ren, Yuan-Xin (1, 2) Author affiliation:(1) Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an; 710127, China; (2) Institute of Qinling Mountains, Northwest University, Xi'an; 710127, China; (3) State Key Laboratory of Water Resources and Hydropower Engineering Science, School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan; 430072, China Corresponding authors:Xia, Jun(xiaj@igsnrr.ac.cn); Xia, Jun(xiaj@igsnrr.ac.cn); Xia, Jun(xiaj@igsnrr.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4708-4716 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Environmental DNA(eDNA), a new tool for monitoring the biodiversity of aquatic ecosystems, is able to analyze characteristics of biodiversity from a microscopic perspective. Based on eDNA data collected from the Weihe River, diversity indexes, non-metric multidimensional scaling, cluster analysis, and correlation network analysis were employed to explore the diversity and community structure of zooplankton focusing on the niche differentiation of keystone species and environmental adaptability. The eDNA approach identified three types of zooplankton including Rotifera, Cladocera, and Copepoda, among which the dominant species was Brachionus calyciflorus. The zooplankton community shows significant differences in species composition, abundance, diversity and spatial distribution characteristics(P< 0.01). The average values of the Chao1 index, ACE index, Shannon index, and Simpson index were 22.25, 22.38, 2.32, and 0.68, respectively. The downstream biodiversity is significantly higher than in the upstream area. Non-metric multidimensional scale analysis and hierarchical cluster analysis further showed that the zooplankton community structure shows distinct regional differences. The keystone species in the community have a high degree of connection with other species, with a high node degree, centrality, and modularity. The niche breadth(Bi)of the operational taxonomic units(OTUs)of the keystone species varied from 0.38 to 0.80. The medium niche species accounted for 63% of all keystone species. The average niche overlap index(Qik)was 0.72, and the degree of overlap was generally high. RDA analysis further identified that water environmental variables were closely related to changes in the zooplankton community structure and niche differentiation. For example, total nitrogen and water temperature were the main limiting factors, which play important roles in shaping the zooplankton community structure.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Biodiversity Controlled terms:Aquatic ecosystems - Arches - Cluster analysis - Hierarchical systems - Rivers Uncontrolled terms:Community structures - Diversity index - DNA data - Environmental DNA - Keystone species - Niche - Niche differentiation - Spatial heterogeneity - Weihe rivers - Zooplankton communities Classification code:408.2 Structural Members and Shapes - 454 Environmental Engineering - 454.3 Ecology and Ecosystems - 723 Computer Software, Data Handling and Applications - 961 Systems Science Numerical data indexing:Percentage 6.30E+01% DOI:10.13227/j.hjkx.202101098 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945237 Title:Characteristics and Source of VOCs During O3 Pollution Between August to September, Langfang Development Zones Title of translation:廊坊开发区8~9月O3污染过程VOCs污染特征及来源分析 Authors:Zhang, Jing-Qiao (1); Wang, Hong-Liang (1); Fang, Xiao-Yun (2); Liu, Rui-Ze (1); Ding, Wen-Wen (1); Ling, De-Yin (3); Wang, Shu-Lan (1) Author affiliation:(1) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) Ao Lai Guo Xin(Beijing)Testing & Detection Technology Co., Ltd., Beijing; 101399, China; (3) Langfang Development Zones Environmental Protection Agency, Langfang; 065001, China Corresponding author:Wang, Shu-Lan(wangsl@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4632-4640 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A total of 99 volatile organic compound(VOC)species were detected the Langfang development zones based on continuous monitoring using a ZF-PKU-1007 between August 25 and September 30, 2018. The concentrations, reactivity, and sources of VOCs were studied under different O3 concentrations using compositional analysis. The results showed that the average VOCs concentration during the research period was(75.17±38.67)×10-9, and was(112.33±30.96)×10-9, (66.25±34.84)×10-9 on pollution days and cleaning days, respectively(VOCs concentrations were 69.6% higher on pollution days). The contribution of VOCs species to the ozone formation potential(OFP)were ranked in the order aldehydes> aromatics> alkenes> alkanes. In the case of L•OH, the main contributions were from aromatics(30.0%)and alkenes(25.8%)on pollution days, while the contribution from aromatic alkenes(29.8%)was a slightly higher than aromatics(28.0%)on cleaning days. By applying the positive matrix factorization(PMF)model, five major VOCs sources were extracted, namely vehicle emissions(34.4%), solvent usage and evaporation(31.7%), the petrochemical industry(15.7%), combustion(11.1%), and plant emissions(7.9%). The contributions of solvent usage and evaporation and plant emission sources on pollution days were 13.1% and 1.2% higher than on cleaning days, respectively, which was likely due to relatively higher temperatures on these days. Therefore, vehicle emissions and solvent usage and evaporation should be priorities in VOCs control strategies for the Langfang development zones between August to September.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Ozone Controlled terms:Aromatization - Cleaning - Evaporation - Factorization - Olefins - Pollution - Volatile organic compounds Uncontrolled terms:Characteristic - Compositional analysis - Compound species - Continuous monitoring - Ozone formation potentials - Ozone(O3) - Plant emissions - Source apportionment - Vehicle emission - Zone-based Classification code:802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.11E+01%, Percentage 1.20E+00%, Percentage 1.31E+01%, Percentage 1.57E+01%, Percentage 2.58E+01%, Percentage 2.80E+01%, Percentage 2.98E+01%, Percentage 3.00E+01%, Percentage 3.17E+01%, Percentage 3.44E+01%, Percentage 6.96E+01%, Percentage 7.90E+00% DOI:10.13227/j.hjkx.202103142 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945236 Title:Characteristics and Health Risk Assessment of Heavy Metals in PM2.5 Under Winter Haze Conditions in Central China: A Case Study of Huanggang, Hubei Province Title of translation:华中地区冬季灰霾天气下PM2.5中重金属污染特征及健康风险评价: 以湖北黄冈为例 Authors:Li, Xing-Yu (1); Mao, Yao (2); Chen, Zhan-Le (1); Liu, Wei-Jie (1); Cheng, Cheng (1); Shi, Ming-Ming (1); Xu, An (1); Su, Ye-Wang (1); Hu, Tian-Peng (1); Qi, Shi-Hua (2); Xing, Xin-Li (1, 2) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan; 430074, China Corresponding authors:Xing, Xin-Li(xlxing@cug.edu.cn); Xing, Xin-Li(xlxing@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4593-4601 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the pollution characteristics and potential health risks of heavy metals in PM2.5 on haze days in Central China, PM2.5 samples were collected from the Huanggang monitoring station, a regional observation point in Central China, between January 13 and 24, 2018. The contents of Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Sn, and Pb in PM2.5 were analyzed by inductively coupled plasma mass spectrometry(ICP-MS), and the enrichment factor method was used to determine the potential risk based on the exposure model recommended by the Environmental Protection Administration(EPA). The results showed that during the observation period, the concentrations of Zn in PM2.5 were highest, and the concentrations of the carcinogens As and Cd were higher than the secondary standard limits of China's ambient air quality standard(GB 3095-2012), with 70% of these elemental concentrations accounting for the largest proportion in the middle haze period. The enrichment factor analysis showed that Cd, Sn, Co, Pb, and Zn were the most abundant elements, especially during the middle haze period, and were mostly derived from transportation and coal combustion. The results of the human health risk assessment showed that exposure via hand-mouth feeding was the main non-carcinogenic risk, and the exposure and non-carcinogenic risks of children were significantly higher than those of adults. Pb poses a non-carcinogenic risk to children, while heavy metals in PM2.5 pose no non-carcinogenic risks to adults and carcinogenic heavy metals pose no carcinogenic risks.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Risk assessment Controlled terms:Air quality - Coal combustion - Environmental Protection Agency - Health - Health risks - Heavy metals - Inductively coupled plasma mass spectrometry - Mass spectrometers Uncontrolled terms:Carcinogenic risk - Case-studies - Central chinas - Condition - Enrichment factors - Haze - Health risk assessments - Hubei Province - PM 2.5 - Potential health risks Classification code:451.2 Air Pollution Control - 454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 461.7 Health Care - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 531 Metallurgy and Metallography - 801 Chemistry - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 7.00E+01% DOI:10.13227/j.hjkx.202101183 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945586 Title:Response of Yield, CH4, and N2O Emissions from Paddy Fields to Long-term Elevated CO2 Concentrations Title of translation:水稻产量, 稻田CH4和N2O排放对长期大气CO2浓度升高的响应 Authors:Yu, Hai-Yang (1, 2); Song, Kai-Fu (1, 2); Huang, Qiong (1, 2); Wang, Tian-Yu (1, 2); Zhang, Guang-Bin (1); Ma, Jing (1); Zhu, Chun-Wu (1); Xu, Hua (1) Author affiliation:(1) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Xu, Hua(hxu@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:5021-5029 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Elevated atmospheric CO2 concentrations([CO2]e)are the main driving force of global climate change, which directly and indirectly affect carbon and nitrogen cycling in the paddy ecosystems. Therefore, understanding the response of rice yield and greenhouse gas emissions to long-term(more than 10 years)[CO2]e from paddy fields is of great significance for food security and future climate change assessment. In this study, strongly and weakly responsive cultivars were used as the experimental materials. Based on a free-air CO2 enrichment(FACE)platform continuously run for 14 years, two treatments of different [CO2] were set: a control(i.e., normal [CO2] and [CO2]a)and a 200 μmol•mol-1 higher than [CO2]a condition, ([CO2]e). CH4 and N2O emissions from the rice paddy fields were monitored in situ by static transparent chamber-gas chromatography, and grain yields were also obtained. The results showed that compared with the [CO2]a treatment, long-term [CO2]e increased grain yields of the strongly and weakly responsive cultivars by 29%-31%(P< 0.05)and 12%-14%(P> 0.05), and CH4 emissions of the strongly and weakly responsive cultivars were reduced by 21%-59% and 11%-54%, respectively. Furthermore, N2O emissions from the strongly and weakly responsive cultivars were significantly reduced by 70%(P< 0.05)and 40%(P< 0.05), respectively. The short- and long-term responses of grain yields and CH4 emissions from rice paddy fields to [CO2]e were significantly different. Specifically, with the increase in the duration of [CO2]e, the increases in rice yields and CH4 emissions significantly decreased, while the N2O emissions showed no significant changes. Therefore, under long-term [CO2]e conditions, the strongly responsive cultivar has a high potential to reduce greenhouse gas emission and increase grain yields.
© 2021, Science Press. All right reserved. Number of references:53 Main heading:Carbon dioxide Controlled terms:Climate change - Food supply - Gas chromatography - Gas emissions - Grain (agricultural product) - Greenhouse gases Uncontrolled terms:CH 4 - CH4 emission - CO 2 concentration - Elevated CO 2 - Elevated CO2 concentration - Grain yield - N2O emission - Paddy fields - The strongly responsive cultivar - The weakly responsive cultivar Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 822.3 Food Products Numerical data indexing:Age 1.00E+01yr, Age 1.40E+01yr, Amount of substance 2.00E-04mol, Percentage 1.10E+01% to 5.40E+01%, Percentage 1.20E+01% to 1.40E+01%, Percentage 2.10E+01% to 5.90E+01%, Percentage 2.90E+01% to 3.10E+01%, Percentage 4.00E+01%, Percentage 7.00E+01% DOI:10.13227/j.hjkx.202103014 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945496 Title:Cultivation and Performance Analysis of Simultaneous Partial Nitrification, ANAMMOX, and Denitratation Granular Sludge Title of translation:同步短程硝化-厌氧氨氧化-短程反硝化颗粒污泥培育过程及其性能 Authors:Zhou, Feng (1); Liu, Yong-Di (1, 2, 3); Li, Wei (1, 2, 3) Author affiliation:(1) National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (3) Shanghai Institute of Pollution Control and Ecological Security, Shanghai; 200092, China Corresponding authors:Li, Wei(wei_li@ecust.edu.cn); Li, Wei(wei_li@ecust.edu.cn); Li, Wei(wei_li@ecust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4864-4871 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
We cultivated simultaneous partial nitrification, anaerobic ammonium oxidizing(ANAMMOX), and denitratation granular sludge in a novel air-lift internal circulation reactor using low C/N wastewater as the substrate and ANAMMOX sludge matched with ordinary activated sludge as the inoculum. The results showed that the mature and stable granular sludge could be cultivated after 225 d of continuous operation, and the total nitrogen removal rate was as high as 91.4%. Compared with flocculated sludge, the ANAMMOX activity in the granular sludge increased significantly, and the ANAMMOX activity was highest among the four nitrogen removal processes followed by partial nitrification, and the specific denitratation activity was 2.1-times higher than the specific nitrite reduction activity. High-throughput sequencing results showed that the dominant bacteria in partial nitrification and ANAMMOX were Nitrosomonas and Candidatus_Brocadia, respectively, compared to flocculated sludge, with abundances increasing to 0.70% and 0.57%, respectively. Thauera may also be the potential dominant bacteria for denitratation, with an abundance of up to 0.26%. RT-qPCR analysis showed that compared to the inoculation stage, the transcript levels of the amoA and hao genes for partial nitrification increased 3.5-and 1.5-fold, respectively, and the transcript levels of the hzsA gene for ANAMMOX increased 2.1-fold. During denitrataion, the overall abundance of napA and narG transcript levels was 4.8-times higher than that of nirK and nirS. The results of this study provide new insights for the treatment of low C/N wastewater.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Flocculation Controlled terms:Bacteria - Genes - Granular materials - Nitrification - Nitrogen removal - Polymerase chain reaction - Wastewater treatment Uncontrolled terms:Anaerobics - Anerobic ammonium oxidizing - Denitratation - Granular sludge - Microbial communities - Oxidizing activity - Partial nitrification - Performances analysis - Structure of microbial community - Transcript level Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 951 Materials Science Numerical data indexing:Percentage 2.60E-01%, Percentage 5.70E-01%, Percentage 7.00E-01%, Percentage 9.14E+01% DOI:10.13227/j.hjkx.202103029 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651114 Title:Vehicle Air Pollutant Emission Inventory and Characterization in Henan Province from 2016 to 2019 Title of translation:河南省2016~2019年机动车大气污染物排放清单及特征 Authors:Gao, Dan-Dan (1); Yin, Sha-Sha (2); Gu, Xing-Ke (1); Lu, Xuan (1); Zhang, Huan (1); Zhang, Rui-Qin (2); Wang, Ling-Ling (3); Qi, Yan-Jie (1) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China; (3) Ecological Environment Monitoring Center of Henan Province, Zhengzhou; 450004, China Corresponding author:Yin, Sha-Sha(shashayin@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3663-3675 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the collected urban motor vehicle activity ownership and traffic flow of highways, combined with the mileage and source profiles of VOCs, using the emission factor method, we established high-resolution emission inventories from 2016 to 2019 for urban and 2016-based highway motor vehicles, respectively, in Henan Province, China. The results showed that gasoline vehicles, particularly minibuses and ordinary motorcycles, were the main contributors of CO, VOCs, and NH3, whereas heavy-duty and light-duty diesel trucks emitted SO2, NOx, and PM. Vehicles with China 1, China 3, and China 4 emission standards contributed significantly to pollutant emissions in the fleet. The temporal variation in traffic flow was consistent with the changes in freight and passenger traffic, with higher coefficients of variation for highways from August to October and the lowest in November. The weekly and daily changes in urban trunk roads showed distinct weekend effects and clear double-peak features, respectively. High-value emission areas were concentrated in urban centers with dense transport networks and high traffic volumes and on roads radiating outward from urban areas. The Lianhuo Expressway and the Beijing-Hong Kong-Macau Expressway were high-emission roads. Light-duty gasoline vehicles made the largest contribution to the ozone formation potential (OFP) of VOCs from motor vehicles. Five species, such as ethylene and propylene, contributed significantly to VOC emissions and OFP. The average annual growth rate of vehicle ownership from 2016 to 2019 was 5.7%. Compared with 2016, VOC emissions increased by 2.8% in 2019, whereas emissions of other pollutants showed decreasing trends of different degrees, with decreases of 76.3%, 51.7%, 50.3%, 43.1%, 16.7%, and 5.9% for SO2, PM2.5, PM10, NH3, CO, and NOx, respectively. The emission reduction percentage of each pollutant in 2019 under the control policies relative to the baseline scenario ranged from 15.6% to 82.4%.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Light weight vehicles Controlled terms:Air pollution - Ammonia - Emission control - Ethylene - Fleet operations - Gasoline - Growth rate - Nitrogen oxides - Sulfur dioxide - Traffic control - Traffic surveys - Urban transportation Uncontrolled terms:Air pollutant emission - Average annual growth rates - Coefficients of variations - Emission reduction - High-resolution emission - Light duty gasoline vehicles - Ozone formation potentials - Pollutant emission Classification code:432 Highway Transportation - 432.4 Highway Traffic Control - 433 Railroad Transportation - 451 Air Pollution - 451.2 Air Pollution Control - 523 Liquid Fuels - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.56e+01% to 8.24e+01%, Percentage 1.67e+01%, Percentage 2.80e+00%, Percentage 4.31e+01%, Percentage 5.03e+01%, Percentage 5.17e+01%, Percentage 5.70e+00%, Percentage 5.90e+00%, Percentage 7.63e+01% DOI:10.13227/j.hjkx.202011125 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651082 Title:Promotion and Mechanisms of DOM on Copper Adsorption by Suspended Sediment Particles Title of translation:DOM对沉积物悬浮颗粒吸附铜的促进作用及机制 Authors:Ding, Xiang (1); Li, Zhong-Wu (1, 2); Xu, Wei-Hua (1); Huang, Mei (1); Wen, Jia-Jun (1); Jin, Chang-Sheng (1); Zhou, Mi (2); Chen, Jia (1) Author affiliation:(1) College of Environmental Science and Engineering, Hunan University, Changsha; 410082, China; (2) College of Resources and Environmental Sciences, Hunan Normal University, Changsha; 410081, China Corresponding author:Li, Zhong-Wu(lizw@hnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3837-3846 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The adsorption of heavy metals by suspended sediment particles is a key process in the migration of heavy metals in lakes and is affected by various environmental conditions. To reveal the effects and mechanisms of dissolved organic matter (DOM) on the adsorption of copper ions by suspended sediment particles, a Cu(Ⅱ) adsorption test was conducted through a laboratory simulation test. The results showed that DOM promoted the adsorption of Cu(Ⅱ) onto the suspended particles. Under the respective influences of fulvic acid and DOM extracted from the sediment of the Xiangjiang River, the adsorption percentage of Cu(Ⅱ) increased from 71.51% to 75.31% and 85.69%. Scanning electron microscope-energy spectroscopy results showed that under the influence of DOM, Cu(Ⅱ) existed inside the sediment particles after being adsorbed. The results of UV-visible (UV-Vis) spectroscopy showed that Cu(Ⅱ) and DOM were first complexed and then dissociated during the adsorption reaction. The results of fluorescent excitation-emission matrix spectroscopy combined with parallel factor analysis and synchronous fluorescence spectroscopy combined with two-dimensional correlation analysis indicate that protein-like components promoted the adsorption of Cu(Ⅱ) onto the sediment suspended particles. In particular, tyrosine-like components played a critical role in promoting adsorption. However, humic-like components hardly promote this adsorption. This study has improved the theory of heavy metal migration in lakes and can be used as a basis for the prevention and control of heavy metal pollution in sediments.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Suspended sediments Controlled terms:Adsorption - Amino acids - Copper - Copper metallography - Fluorescence - Fluorescence spectroscopy - Heavy metals - Lakes - Metal ions - Pollution control - River pollution - Scanning electron microscopy - Spectrum analysis Uncontrolled terms:Dissolved organic matters - Environmental conditions - Excitation emission matrices - Parallel factor analysis - Prevention and controls - Synchronous fluorescence spectroscopy - Twodimensional correlation analysis - Uv-visible spectroscopies Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 531.1 Metallurgy - 544.1 Copper - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Percentage 7.15e+01% to 7.53e+01%, Percentage 8.57e+01% DOI:10.13227/j.hjkx.202012017 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651041 Title:Effects of Coconut Chaff Biochar Amendment on Methane and Nitrous Oxide Emissions from Paddy Fields in Hot Areas Title of translation:椰糠生物炭对热区双季稻田N2O和CH4排放的影响 Authors:Wang, Zi-Jun (1); Wang, Hong-Hao (1); Li, Jin-Qiu (1); Wu, Yan-Zheng (1); Fu, Pei-Jiao (1); Meng, Lei (1); Tang, Shui-Rong (1) Author affiliation:(1) College of Tropical Crops, Hainan University, Haikou; 570228, China Corresponding authors:Wu, Yan-Zheng(wyz198712@163.com); Meng, Lei(menglei@hainanu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3931-3942 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the rice-vegetable crop rotation model, in-situ measurements of nitrous oxide (N2O) and methane (CH4) emissions were conducted in double-cropping rice fields in Hainan to determine the impact of coconut chaff biochar on greenhouse gas emissions. The experiment involved four treatments: conventional farming fertilization (CON), nitrogen fertilizer combined with 20 t•hm-2 biochar (B1), nitrogen fertilizer combined with 40 t•hm-2 biochar (B2), and no nitrogen fertilizer, as the control (CK). The N2O and CH4 emissions were measured using static chamber-gas chromatography during the two paddy seasons, and the global warming potential (GWP) and greenhouse gas intensity (GHGI) were also estimated. The results show that N2O emission dynamics during the early rice season are closely related to the mineral nitrogen content of the soil. The N2O is emitted at the rice seedling and tillering stages after fertilization. The cumulative N2O emission during the early rice season was 0.18- 0.76 kg•hm-2. Compared with the CON treatment, the biochar treatments reduced N2O by 18%- 43%, and the B2 treatment resulted in a significant reduction. The addition of biochar may promote the reduction of N2O at the early rice seedling stage and increase N2O emissions by improving the soil NO3--N content at the early rice tillering stage. During the late rice season, N2O is emitted during the heading and maturity stages, and the cumulative N2O emission was 0.17- 0.34 kg•hm-2. The B1 treatment reduced emissions by 37%, and B2 increased emission by only 3%, which is not a significant difference. The peak of CH4 emissions from rice fields appeared in the late phase of the early rice season and prophase of the late rice season. The cumulative emission of CH4 in the early rice season was 3.11- 14.87 kg•hm-2. Compared with CON, the CK treatment increased emission by 39%. The biochar treatment may increase soil aeration and limit the ability of CH4 production in the early rice season, as B1 and B2 treatments reduced CH4 emissions by 28% and 71%. The cumulative CH4 emission in late rice season was 53.1- 146.3 kg•hm-2, and the emission dynamics were significantly positively correlated with NH4+-N content. CK and B1 treatments increased CH4 emissions by 52% and 99%, respectively compared with CON, and the B2 treatment significantly increased CH4 emissions by 176%. Compared with CON, the B1 and B2 treatments increased the yield by 12.0% and 14.3% when applied in the early rice season and by 7.6% and 0.4% when applied in the late rice season, respectively. Due to the increased methane emissions in the late rice season, biochar amendment increased the GWP of the double-cropping rice field, in which the high amount of biochar reached a significant level; different amounts of biochar had no significant effect on the GHGI of the double-cropping rice field. Thus, the application of coconut chaff biochar for the reduction of greenhouse gas emission, from rice fields in hot areas, requires further research.
© 2021, Science Press. All right reserved. Number of references:74 Main heading:Gas emissions Controlled terms:Agriculture - Gas chromatography - Global warming - Greenhouse gases - Methane - Nitrogen fertilizers - Nitrogen oxides - Soils Uncontrolled terms:Biochar amendments - Cumulative emissions - Emission dynamics - Global warming potential - In-situ measurement - Methane emissions - Mineral nitrogen content - Nitrous oxide emissions Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 1.20e+01%, Percentage 1.43e+01%, Percentage 1.76e+02%, Percentage 1.80e+01% to 4.30e+01%, Percentage 2.80e+01%, Percentage 3.00e+00%, Percentage 3.70e+01%, Percentage 3.90e+01%, Percentage 4.00e-01%, Percentage 5.20e+01%, Percentage 7.10e+01%, Percentage 7.60e+00%, Percentage 9.90e+01% DOI:10.13227/j.hjkx.202011247 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651021 Title:Effects of Biochar Addition Under Different Water Management Conditions on N2O Emission From Paddy Soils in Northern Hainan Title of translation:不同水分管理条件下添加生物炭对琼北地区水稻土N2O排放的影响 Authors:Wang, Hong-Hao (1); Tan, Meng-Yi (1); Wang, Zi-Jun (1); Fu, Pei-Jiao (1); Li, Jin-Qiu (1); Tang, Shui-Rong (1); Wu, Yan-Zheng (1); Meng, Lei (1) Author affiliation:(1) College of Tropical Crops, Hainan University, Haikou; 570228, China Corresponding authors:Wu, Yan-Zheng(wyz198712@163.com); Meng, Lei(menglei@hainanu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3943-3952 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Alternating dry and wet conditions affect the main processes of N2O production, such as nitrification and denitrification. Such conditions are very common in tropical rice-growing areas, such as Hainan. As a type of soil amendment, biochar is widely used to improve physical and chemical properties of soil and to reduce soil greenhouse gas emissions. However, there is a lack of existing in-depth research on the emission reductions of biochar when used in tropical soils that undergo frequently alternating dry and wet conditions. In this experiment, typical paddy soil from northern Hainan was used as the test soil, and corn stalk biochar, carbonized under anaerobic conditions at 400℃, was used as the test biochar. This experiment explored the effects of adding biochar on soil greenhouse gas emissions and microbial-related functional genes under different water management conditions. The experiment comprised a 30 d culture, kept in the dark at 25℃, and a total of six treatments: alternating dry-wet conditions without adding biochar (AWD1), alternating dry-wet conditions with 2% biochar (AWD2), alternating dry-wet conditions with 4% biochar (AWD3), continuous flooding without adding biochar (CF1), continuous flooding with 2% biochar (CF2), and continuous flooding with 4% biochar (CF3). The results showed that: ① the addition of biochar under different moisture conditions can reduce N2O emissions in acidic paddy soil (P<0.05, the same below), as the total N2O emissions with the AWD3 treatment were 0.43 mg•kg-1, which indicates an approximate reduction of 68%, relative to the AWD1 treatment; ② Corn stalk biochar can significantly increase the soil pH under different water management conditions. Compared to the no-biochar treatment, the soil pH increased by 0.5 units on average after cultivation with the addition of biochar, and as the soil NH4+-N content increased, it led to a decrease in Eh. ③ Corn stalk biochar significantly reduces the abundance of ammonia oxidizing bacteria and significantly increases the nosZ gene abundance. However, it decreases the ratio of (nirK+nirS)/nosZ, inhibits the nitrification process, and promotes the reduction of N2O in the denitrification process. Thereby, the addition of corn stalk biochar can reduce N2O emissions. These results show that alternating dry-wet conditions, combined with the addition of corn stalk biochar, are beneficial for reducing N2O emissions in paddy soil, which may have further application in the reduction of agricultural greenhouse gas emissions in northern Hainan.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Soil testing Controlled terms:Agricultural robots - Ammonia - Bacteria - Cultivation - Denitrification - Emission control - Floods - Gas emissions - Genes - Greenhouse gases - Nitrification - Soils - Tropics - Water management Uncontrolled terms:Agricultural greenhouse - Ammonia oxidizing bacteria - Anaerobic conditions - Denitrification process - Dry and wet conditions - Nitrification and denitrification - Nitrification process - Physical and chemical properties Classification code:443 Meteorology - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 821.3 Agricultural Methods Numerical data indexing:Percentage 2.00e+00%, Percentage 4.00e+00%, Percentage 6.80e+01% DOI:10.13227/j.hjkx.202011197 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650959 Title:Distribution, Sources, and Risk Assessment of Polyfluoroalkyl Substances in Main Rivers and Soils of Tianjin Title of translation:天津市主要河流和土壤中全氟化合物空间分布,来源及风险评价 Authors:Wu, Qian-Qian (1); Wu, Qiang (1, 2); Song, Shuai (2); Ren, Jia-Guo (1); Yang, Sheng-Jie (2); Wu, Yan-Qi (2) Author affiliation:(1) School of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao; 266590, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Song, Shuai(shuaisong@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3682-3694 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Rapid urbanization and industrialization may potentially impact the spatial distribution and transmission of polyfluoroalkyl substances (PFASs). Tianjin, a typical industrialized city with a high urbanization level around Bohai Bay, was selected to evaluate the spatial distribution and ecological risks of PFASs. Water and soil samples were systematically collected and analyzed by using solid-phase extraction and high-performance liquid chromatography-tandem mass spectrometry (HPLC/MS-MS) methods. The results showed that all 12 PFASs were detected in water and soils, and the detection rates of the other congeners were low. The concentrations of ∑PFASs in water ranged from 3.93 to 357.85 ng•L-1, and the levels of ∑PFASs in soils ranged from 4.60 to 63.85 ng•g-1. PFBA was the major component in water and soils, and the contribution of PFBA was 37% and 67% in water and soils, respectively. The spatial difference in ∑PFASs in the water bodies was significant. ∑PFAS concentrations in the surface water were higher in the north (mean value of 63.83 ng•L-1) than in the south (mean value of 51.71 ng•L-1) and higher in the eastern coastal area (mean value of 71.36 ng•L-1) than in the western area (mean value of 36.08 ng•L-1). ∑PFAS concentrations from upstream to downstream of the rivers showed an increasing trend. The highest PFAS concentration was found in the Chaobai River, and the lowest was detected in the South Canal. The spatial distribution of PFASs in soils was higher in the south (mean value of 13.33 ng•g-1) than in the north (mean value of 6.38 ng•g-1) and higher in the eastern coastal region (mean value of 11.45 ng•g-1) than in the western region (mean value of 6.94 ng•g-1). The soil concentrations of ∑PFASs in the Haihe River Basin were the highest. The source analysis results showed that the emulsification of rubber products, food packaging process, paper surface treatment, fire extinguishing agent use, and electrochemical fluorination process in industrial production were the main sources of PFASs in the soils in the study area. PFOS/PFOA, PFOA/PFNA, and PFHpA/PFOA analyses showed that the main source of PFASs in water bodies was the degradation of precursors. ∑PFASs in a few areas originated from the direct emissions from production, but the atmospheric deposition was small. The results of the ecological risk evaluation indicated that the exposure concentrations of PFASs in water and soils in the study area were at a low ecological risk level. However, the long-term ecological effects of PFASs cannot be ignored because of their long-distance transport capability and high food chain (web) accumulation capability.
© 2021, Science Press. All right reserved. Number of references:73 Main heading:Rivers Controlled terms:Coastal zones - Ecology - Emulsification - Fire extinguishers - Fluorination - High performance liquid chromatography - Mass spectrometry - Meteorological problems - Phase separation - Risk assessment - Rubber industry - Rubber products - Soil surveys - Soils - Spatial distribution - Surface treatment Uncontrolled terms:Atmospheric depositions - Electrochemical fluorination process - Exposure concentration - Fire extinguishing agents - High-performance liquid chromatography tandem mass spectrometries - Long-distance transport - Polyfluoroalkyl substances - Solid-phase extraction Classification code:443.1 Atmospheric Properties - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 483.1 Soils and Soil Mechanics - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 818.4 Rubber Factories and Machinery - 818.5 Rubber Products - 914.1 Accidents and Accident Prevention - 914.2 Fires and Fire Protection - 921 Mathematics Numerical data indexing:Mass_Density 3.61e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 3.93e-09kg/m3 to 3.58e-07kg/m3, Mass_Density 5.17e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 6.38e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 7.14e-08kg/m3 to 2.20e-02kg/m3, Percentage 3.70e+01%, Percentage 6.70e+01% DOI:10.13227/j.hjkx.202012044 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650973 Title:Spatial Distribution Pattern and Influencing Factors of Industrial Pollution Emissions in Yangtze River Economic Belt Title of translation:长江经济带工业污染排放空间分布格局及其影响因素 Authors:Li, Yun-Yi (1); Liu, Li-Ping (1); Liu, Yuan-Yuan (1) Author affiliation:(1) Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing; 400045, China Corresponding author:Liu, Yuan-Yuan(liuyuanyuan@cqu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3820-3828 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The development of Yangtze River economic belt emphasizes the strategy of "no large-scale development, joint efforts in large-scale protection". The restoration of the Yangtze River environment has become an important part of the development of the region. Therefore, it is important to explore the spatial distribution of industrial pollution emissions and its influencing factors in the Yangtze River economic belt. Using industrial SO2, wastewater, and soot emission data from 102 cities in the Yangtze River economic belt, from 2013 to 2017, this study analyzes the spatial distribution of industrial pollution emissions in the Yangtze River economic belt. This was achieved using spatial autocorrelation analysis and Getis-Ord Gi*methods, and by adopting the logarithmic mean Divisia index model to decompose the influencing factors of industrial pollution emissions in the Yangtze River economic belt. The results show that from 2013 to 2017, the emissions of industrial SO2, wastewater, and soot in the Yangtze River economic belt exhibited a downward trend, with a decrease in the number of high-emission cities and an increase in the number of low-emission cities. The spatial correlation of industrial pollutants increased with time, and technological improvements had the most significant inhibitory effect, making it the most important factor affecting industrial pollution emissions in the Yangtze River economic belt.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:River pollution Controlled terms:Industrial economics - Industrial emissions - Rivers - Soot - Spatial distribution - Spatial variables measurement - Sulfur dioxide Uncontrolled terms:Industrial pollutants - Industrial pollution - Inhibitory effect - Large-scale development - Spatial autocorrelation analysis - Spatial correlations - Spatial distribution patterns - Technological improvements Classification code:451.1 Air Pollution Sources - 453 Water Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 911.2 Industrial Economics - 921 Mathematics - 943.2 Mechanical Variables Measurements DOI:10.13227/j.hjkx.202011017 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239971 Title:Coupling Effects of Water-saving Irrigation and Controlled-release Fertilizer (CRF) Application on CH4 and N2O Emission in Single Cropping Paddy Field Title of translation:节水灌溉和控释肥施用耦合措施对单季稻田CH4和N2O排放的影响 Authors:Wang, Yong-Ming (1); Xu, Yong-Ji (1); Ji, Yang (1); Feng, Yan-Fang (2) Author affiliation:(1) School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Key Laboratory of Argo-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing; 210014, China Corresponding author:Ji, Yang(jiyang@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6025-6037 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
By the method of static closed chamber-gas chromatography (GC), a two-year greenhouse experiment was launched using an intact soil core of single cropping rice in East China to explore the synergistic effects of water-saving irrigation and controlled-release fertilizer (CRF) application on CH4 and N2O emissions during rice growth, with the aim of establishing water and fertilization management regimes with effects on yield promotion and greenhouse gas mitigation. Nine treatments included three different types of nitrogen fertilizer application (no nitrogen [CK], urea [Urea], and controlled release fertilizer [CRF]) and three different types of irrigation management (continuous flooding [CF], intermittent irrigation [II], and controlled irrigation [CI]). The two-year results showed that two of the water-saving irrigation management types (II and CI) significantly affected CH4 and N2O emissions from paddy soil and their global warming potential (GWP) and greenhouse gas intensity (GHGI). Compared with CF, II and CI both increased the N2O emission and decreased CH4 emissions, resulting in the reduction of GWP and GHGI by 28.9%-71.4% and 14.3%-70.4%, respectively (P<0.05). Compared to II, CI had better CH4 emission mitigation potential, with reductions of 57.7%-91.8%; however, there was no significant difference in N2O emissions. Finally, the mitigation of the CI method on GWP and GHGI was slightly better than that of the II method by 2.0%-56.2%. Compared with CK, N application significantly promoted N2O emission by 18.4%-2547.8% (P<0.05) in two years, in which N2O emissions were slightly higher by 32.7%-78.6% in CRF than those in Urea treatments; however, no significant difference was found (P>0.05). The response of total CH4 emissions to N application varied with different water management practices. In general, no significant differences were found in CH4 emissions, GWP, or GHGI in the paddy soil between CRF and Urea application. Correlation analysis showed that in 2018, N2O emission fluxes of the Urea treatment of the CF model and the Urea and CRF treatment of the II model were all significantly positively correlated with NH4+-N concentration in floodwater (P<0.01). By contrast, in 2019, a negative correlation was found in the CK and CRF treatments of the CI model (P<0.05). N2O emission fluxes of the CK and CRF treatments of the CI model in 2018 were significantly positively correlated with NO3--N concentration in floodwater (P<0.01). Water-saving irrigation and N application both had significant effects on rice yield. Compared with that of the CF method, the rice yield showed a decreasing trend by 14.7%-37.7% under the two water-saving irrigation modes (II and CI). Compared with that of the Urea treatment, CRF application increased rice yield by 2.5%-7.4%; however, no significant difference was found (P>0.05). Considering the GWP, GHGI, and rice yield results, the coupling effect of water-saving irrigation and CRF application on the GWP mitigation and yield promotion in paddy fields requires further investigation.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Greenhouse gases Controlled terms:Gas chromatography - Gas emissions - Global warming - Irrigation - Metabolism - Nitrogen fertilizers - Soils - Urea - Water conservation Uncontrolled terms:CH 4 - Controlled irrigations - Controlled-release fertilizers - Fertilizer applications - Global warming potential - Greenhouses gas - Intermittent irrigations - Paddy fields - Rice yield - Water-saving irrigation Classification code:443.1 Atmospheric Properties - 444 Water Resources - 451.1 Air Pollution Sources - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.2 Agricultural Chemicals - 821.3 Agricultural Methods Numerical data indexing:Percentage 1.43E+01% to 7.04E+01%, Percentage 1.47E+01% to 3.77E+01%, Percentage 1.84E+01% to 2.5478E+03%, Percentage 2.00E+00% to 5.62E+01%, Percentage 2.50E+00% to 7.40E+00%, Percentage 2.89E+01% to 7.14E+01%, Percentage 3.27E+01% to 7.86E+01%, Percentage 5.77E+01% to 9.18E+01% DOI:10.13227/j.hjkx.202103275 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239989 Title:Impacts of Wastewater Effluent Discharge on Bacteria Community and Water-soluble Organic Matter in Benthic Biofilm in Receiving River Title of translation:尾水排放对受纳水体底栖生物膜细菌群落和水溶性有机质的影响机制 Authors:Wang, Yu-Tao (1); Fan, Chen-Yang (1); Zhu, Jin-Xin (1); Li, Yi (1); Wang, Long-Fei (1) Author affiliation:(1) Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing; 210098, China Corresponding author:Wang, Long-Fei(lfwang@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5826-5835 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Benthic biofilms, which respond rapidly to environmental alterations, are important primary producers and play an important role in the carbon cycle in riverine ecosystems. However, there is limited knowledge on the characteristics and linkages between water-soluble organic matter (WSOM) and bacterial communities in the benthic biofilm along the effluent-receiving river. In this study, an integrated use of 16S rRNA high-throughput sequencing, UV-vis spectroscopy, and EEM-PARAFAC analysis were employed to characterize WSOM and bacterial communities in benthic biofilm, and their relationships were investigated through a co-occurrence network. Two humic-like fractions and one tryptophan-like protein fraction were identified, with macromolecular humic fractions dominating the benthic WSOM. The uniformity and diversity of the benthic biofilm bacterial community increased along the effluent-receiving river, and the biofilm bacterial community structure in the downstream area of WWTP was more stable compared to that in the upstream area. Colored water-soluble organic matter, aromaticity, and molecular weight of organic matter were proven predominant factors influencing the benthic biofilm bacterial community, with aromatic tryptophan-like proteins explaining the highest change (34%) in the biofilm bacterial community. The co-occurrence network shows the complex relationships in the bacterial communities. The phylum of Proteobacteria and Halobacterota participate in the metabolism of biofilm WSOM through carbon cycling. The composition of the biofilm bacterial community and WSOM respond to effluent discharge in a dynamically changing pattern. This study provides a new insight for exploring ecological indicators responding to effluent discharge.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Bacteria Controlled terms:Amino acids - Biofilms - Biogeochemistry - Carbon - Effluents - Proteins - Rivers - RNA - Ultraviolet visible spectroscopy Uncontrolled terms:Bacteria community - Bacterial community - Benthic biofilm - Carbon cycles - Co-occurrence networks - Effluent discharge - Primary producers - Riverine ecosystems - Wastewater effluents - Water-soluble organic matter Classification code:452.3 Industrial Wastes - 461.2 Biological Materials and Tissue Engineering - 462.5 Biomaterials (including synthetics) - 481.2 Geochemistry - 801.2 Biochemistry - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 3.40E+01% DOI:10.13227/j.hjkx.202104078 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239930 Title:Investigations on the Derivation of Safe Maize-Producing Threshold of Soil Cd Content and on Classification of Cd Contaminated Maize-Producing Areas in Northern China Title of translation:北方农田镉污染土壤玉米生产阈值及产区划分初探 Authors:Guan, Wei-Dou (1); Guo, Di (1); Wang, Ping (1); Zhang, Zeng-Qiang (1); Li, Rong-Hua (1, 2) Author affiliation:(1) College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) Key Laboratory of Plant Nutrition and Agro-environment in Northwest Region, Ministry of Agriculture and Rural Affairs, Yangling; 712100, China Corresponding authors:Li, Rong-Hua(rh.lee@nwsuaf.edu.cn); Li, Rong-Hua(rh.lee@nwsuaf.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5958-5966 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to explore the soil thresholds and production area division of maize in cadmium (Cd) contaminated farmland in northern China, 129 pairs of point-to-point soil and maize samples were collected from various maize-production areas with different degrees of Cd pollution in northern China. The quantitative relationships between soil properties and Cd content in soil and maize grains were analyzed. Multiple linear regression and Species Sensitivity Distribution (SSD) curve methods were used to determine the thresholds of soil Cd under different soil scenarios, and to differentiate the 'suitable, limited, and forbidden' production areas of maize. The results showed that the content of Cd in the soil and maize grains exceeded the permissible limits of soil and food standards by 99.62% and 49.61%, respectively. The bioconcentration coefficient (BCF) of Cd in maize grains was significantly correlated with soil pH, soil organic matter (SOM), cation exchange capacity (CEC), and soil DTPA-Cd content (P<0.01), respectively. The prediction formula established by multiple linear regression could explain 71.9% of the variation in the dependent variable. Based on the soil characteristics in northern maize-production areas, in this study, three typical soil scenarios were divided as follows: scenario 1: 6.5<pH≤7.5, ω(SOM)=15 g•kg-1, CEC=15 cmol•kg-1; scenario 2: 7.5<pH<8.5, ω(SOM)=20 g•kg-1, CEC=20 cmol•kg-1; scenario 3: pH≥8.5, ω(SOM)=17 g•kg-1, CEC=17 cmol•kg-1. According to the logistic function model of the SSD method, the soil Cd thresholds of suitable maize-producing areas were 3.00, 3.80, and 3.11 mg•kg-1, respectively, and the soil Cd thresholds of the forbidden maize-producing areas were 8.95, 9.10, and 7.21 mg•kg-1, respectively. The area with soil Cd content within a range of the suitable area thresholds and the forbidden area thresholds was considered as restricted for the maize-producing area. When maize was used as feed, the suitable production thresholds were 14.94, 18.90, and 15.55 mg•kg-1, respectively, and the forbidden thresholds were 44.93, 45.40, and 36.05 mg•kg-1, respectively. The area between them was considered as a restricted feed-production area. The results in this study can provide technical support for the safer maize production and classification management of farmland soil in northern China's maize-producing areas.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Bioaccumulation Controlled terms:Cadmium - Linear regression - Soil pollution - Soils Uncontrolled terms:Bioconcentration - Bioconcentration coefficient - Cadmium content - Producing areas - Production area - Production yield - Production yield division - Quantitative relationship - Soil cadmiums - Threshold Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 922.2 Mathematical Statistics Numerical data indexing:Amount of substance 1.50E-01mol, Amount of substance 1.70E-01mol, Amount of substance 2.00E-01mol, Mass 1.50E-02kg, Mass 1.555E-05kg, Mass 1.70E-02kg, Mass 2.00E-02kg, Mass 3.11E-06kg, Mass 3.605E-05kg, Mass 7.21E-06kg, Percentage 4.961E+01%, Percentage 7.19E+01%, Percentage 9.962E+01% DOI:10.13227/j.hjkx.202104165 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066051 Title:Effects of Different Fertilization Patterns on Nitrogen Leaching Loss from Paddy Fields Under Reduced Nitrogen Title of translation:减氮条件下不同施肥模式对稻田氮素淋溶流失的影响 Authors:Jiang, Hai-Bin (1, 2, 3); Zhang, Ke-Qiang (1, 3); Zou, Hong-Tao (2); Ma, Ying-Jun (1, 3); Qu, Qing-Bo (1); Gu, Yan-Ru (1); Shen, Shi-Zhou (1, 3) Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (2) College of Land and Environment, Shenyang Agricultural University, Shenyang; 110866, China; (3) Dali Observation and Experimental Station of National Agricultural Environment, Dali; 671004, China Corresponding authors:Shen, Shi-Zhou(shenshizhou@126.com); Shen, Shi-Zhou(shenshizhou@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5405-5413 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Nitrogen leaching loss in paddy fields is one of the main ways of farmland non-point source pollution. To explore the suitable fertilization of rice fields in the Erhai Lake Basin and reduce the nitrogen loss from paddy fields, a field experiment was conducted by setting single applications of chemical or organic fertilizer, combined organic and inorganic application, and single application of controlled release fertilizer under reduced nitrogen conditions. The results showed that, compared with the conventional fertilization treatment(CF), there was no significant difference in rice grain and straw yield between the single chemical fertilizer treatment(T1)and the organic-inorganic combined treatment(T3); the single organic fertilizer treatment(T2)decreased the rice grain yield by 13.0%, and decreased straw yield by 17.1%; single application of controlled-release fertilizer(T4)increased rice grain and straw yield by 15.7% and 21.0%, respectively. Further, compared with CF, the single application of chemical fertilizer(T1), organic fertilizer(T2), and organic-inorganic combined application(T3)reduced the total nitrogen leaching loss at 30 cm depths by 26.9%, 18.0%, and 33.9%, respectively. The loss of ammonia nitrogen leaching with T1, T2, and T3 decreased by 24.4%, 36.9%, and 36.6%, respectively, and the loss of nitrate nitrogen leaching decreased by 40.2%, 4.8% and 46.4%. The total nitrogen leaching at 60 cm soil depths was reduced by 34.2%, 26.3%, and 42.1%, the loss of ammonia nitrogen leaching was reduced by 31.4%, 35.7%, and 46.6%, and the loss of nitrate nitrogen leaching was reduced by 8.0%, 10.1%, and 23.9% for T1, T2, and T3, respectively. The total nitrogen loss at 30 and 60 cm depths increased by 41.6% and 14.0% in the single application of controlled release fertilizer(T4)treatment. Considering factors such as agronomic and environmental benefits of different fertilization modes, T1 and T3 are suitable environmentally friendly alternative fertilization modes.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Leaching Controlled terms:Ammonia - Grain (agricultural product) - Lakes - Nitrates - Nitrogen fertilizers Uncontrolled terms:Chemical fertilizers - Erhai lake basins - Fertilisation - Fertilization mode - Leaching loss - Nitrogen leaching - Nitrogen loss - Organic fertilizers - Paddy fields - Yield Classification code:802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals - 821.4 Agricultural Products Numerical data indexing:Percentage 1.01E+01%, Percentage 1.30E+01%, Percentage 1.40E+01%, Percentage 1.57E+01%, Percentage 1.71E+01%, Percentage 1.80E+01%, Percentage 2.10E+01%, Percentage 2.39E+01%, Percentage 2.44E+01%, Percentage 2.63E+01%, Percentage 2.69E+01%, Percentage 3.14E+01%, Percentage 3.39E+01%, Percentage 3.42E+01%, Percentage 3.57E+01%, Percentage 3.66E+01%, Percentage 3.69E+01%, Percentage 4.02E+01%, Percentage 4.16E+01%, Percentage 4.21E+01%, Percentage 4.64E+01%, Percentage 4.66E+01%, Percentage 4.80E+00%, Percentage 8.00E+00%, Size 3.00E-01m, Size 6.00E-01m DOI:10.13227/j.hjkx.202104111 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065972 Title:Spatial Distribution Characteristics of the Spectrum, Source Analysis, and Nitrogen Response of Dissolved Organic Matter in Summer Rainfall in the Hebei Province Title of translation:河北省夏季降雨溶解性有机物光谱特征的空间分布, 来源解析及氮素响应 Authors:Zhang, Zi-Wei (1); Zhou, Shi-Lei (1); Chen, Zhao-Ying (1); Zhang, Tian-Na (1); Dong, Wan-Jia (1); Zhen, Yu-Han (1); Zhang, Xin-Tong (1); Yao, Bo (1); Cui, Jian-Sheng (1) Author affiliation:(1) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China Corresponding author:Zhou, Shi-Lei(ZSLZhouShilei@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5250-5263 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Dissolved organic matter(DOM)is an important component of the organic matter in the environment. This study explored the characteristics of DOM. The components and spectral characteristics of rainwater DOM were measured using Ultraviolet-visible absorption spectrum(UV-vis)and three-dimensional fluorescence spectrum in the Hebei province. The results showed significant differences for DOM molecular weight in the northern, central, and southern region; the DOM of the northern region exhibited the lowest molecular weight. Two humic-like(C1 and C4), one protein-like(C2)and one fulvic-like(C3)components were identified by parallel factor(PARAFAC)analysis. Component C2 had a significant positive correlation with components C3 and C4(P<0.001), which may have similar sources. The C2(protein-like substances)accounted for the major proportion of DOM with the average abundance 40.59%. The DOM components based on PARAFAC exhibited significantly difference between city and country regions without spatial difference, which was consistent with the result of fluorescence regional integration(FRI). The protein-like substances based on FRI were the main components, which accounted for 61.59%-89.01%. Redundancy analysis(RDA)showed that total nitrogen, nitrate, and ammonia were the main environmental factors determining the distribution of DOM. Spectral indices presented a significant difference between city and country regions. High fluorescence(FI)and biological(BIX)and low humification(HIX)values showed that summer rain exhibited the strong autochthonous and low humification characteristics, and country region have stronger autochthonous characteristics than city region. The regression analysis demonstrates that the prediction accuracy of rainwater quality parameters in city region is high. From all the results, rainwater DOM, showing strong autogenous characteristics, exhibited significant differences between city and country regions without spatial difference in Hebei. Meanwhile, it can also provide technical support for rainwater nitrogen concentration prediction based on DOM components.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Regression analysis Controlled terms:Absorption spectroscopy - Ammonia - Biodegradation - Biogeochemistry - Factor analysis - Fluorescence - Molecular weight - Multivariant analysis - Proteins - Quality control - Rain Uncontrolled terms:Dissolved organic matters - Distribution characteristics - Fluorescence regional integration - Hebei Province - Humification - Parallel factor analysis - Rainwater - Regional integration - Spatial differences - Spectra's Classification code:443.3 Precipitation - 461.8 Biotechnology - 481.2 Geochemistry - 741.1 Light/Optics - 801.2 Biochemistry - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control - 922 Statistical Methods - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics Numerical data indexing:Percentage 4.059E+01%, Percentage 6.159E+01% to 8.901E+01% DOI:10.13227/j.hjkx.202102108 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065965 Title:Optimization of Extraction Methods and Distribution Characteristics of Antibiotics and Metabolites in Sediments of a River Water-Groundwater Interaction Zone Title of translation:河水-地下水交互带沉积物中抗生素和代谢产物提取方法优化及其分布特征 Authors:Li, Yu-Qiong (1); Tong, Lei (1); Yan, Han (1); You, Yue (2); Lu, Yu-Xi (3); Liu, Hui (1, 3) Author affiliation:(1) School of Environment Studies, China University of Geosciences, Wuhan; 430078, China; (2) Geological Survey, China University of Geosciences, Wuhan; 430074, China; (3) State Key Laboratory of Biogeology and Environmental Geology, Wuhan; 430078, China Corresponding author:Tong, Lei(tonglei@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5294-5302 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The river water-groundwater interaction zone is an important area for the enrichment, degradation, and transformation of pollutants and other biogeochemical processes. The distribution characteristics of antibiotics, as organic pollutants of wide concern, in the interaction zone is essential for understanding the migration and transformation process of pollutants in the environment. Due to the sensitive changes in the redox conditions and special composition of sediments in the interaction zone, this study established an effective pretreatment method for extracting 22 antibiotics and four sulfonamide metabolites in the interaction zone, and optimized the initial state of the samples, extraction temperature, pH value of the extraction solution and organic extraction solvent. The content of antibiotics in the sediments of the river water-groundwater interaction zone and lower reaches of the Hanjiang River was also analyzed. The results show that the best recovery of the target compounds is obtained by using pH 3 acetonitrile/Na2EDTA-Mcllvaine buffer(1: 1, volume ratio)to digest and extract the unoxidized sediment samples at 40℃ three times using a microwave. A total of 11 antibiotics are detected in the sediments of the interaction zone in the lower reaches of the Hanjiang River, among which oxytetracycline and ofloxacin are the main compounds with the highest concentrations of 6.77 ng•g-1 and 5.81 ng•g-1, respectively. The vertical distribution of antibiotics in different sediment profiles is significantly different, which may be related to the lithology of sediments, physicochemical properties of antibiotics, and interaction between surface water and groundwater.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Sediments Controlled terms:Antibiotics - Extraction - Groundwater - Groundwater pollution - Lithology - Metabolites - Organic pollutants - Physicochemical properties - Rivers - Sulfur compounds Uncontrolled terms:Distribution characteristics - Groundwater interaction - Hanjiang rivers - Interaction zone - Low reach of hanjiang river - Optimisations - River water - Sediment extraction - Sulphonamide metabolite - Sulphonamides Classification code:444.2 Groundwater - 453.1 Water Pollution Sources - 461.6 Medicine and Pharmacology - 481.1 Geology - 483 Soil Mechanics and Foundations - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Mass 1.00E-12kg, Mass 5.81E-12kg, Mass 6.77E-12kg DOI:10.13227/j.hjkx.202102091 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066041 Title:Cd Pollution and Safe Planting Zoning in Paddy Soils: A Case Study in a District of Chongqing Title of translation:稻田土壤Cd污染与安全种植分区: 以重庆市某区为例 Authors:Cao, Shu-Zhen (1); Mu, Yue (1); Cui, Jing-Xin (1, 2); Liu, An-Di (1); Cheng, Xian (1); Fu, Yuan-Hang (1); Wei, Shi-Qiang (1); Zhang, Jin-Zhong (1) Author affiliation:(1) Chongqing Key Laboratory of Agricultural Resources and Environment Research, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Xi'an City Drainage Group, Xi'an; 710077, China Corresponding author:Zhang, Jin-Zhong(jzhzhang@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5535-5544 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Rice has a strong ability to accumulate Cd in soil, and it is of great significance to study Cd pollution and safe planting zoning in paddy soils. In this work, 300 sets of paddy soil-rice samples were simultaneously collected in 22 towns in a District of Chongqing, and soil pH, soil total and available Cd contents, and brown rice Cd contents were determined. Soil Cd pollution was assessed using the geoaccumulation index, bioconcentration factor, and the single-factor pollution index. Based on the Cd pollution indices of soil and brown rice, safe planting zoning for rice was determined. The results showed that the paddy soils were generally acidic, and total Cd contents ranged from 0.09 mg•kg-1 to 1.60 mg•kg-1, with 35.0% of sites exceeding the risk screening value. The Cd contents of the brown rice ranged from 0.002 mg•kg-1 to 0.808 mg•kg-1 and exceeded the food safety limit in 13.7% of cases. Pearson correlation analysis showed that the Cd content of brown rice was significantly positively correlated with soil total and available Cd (P<0.01). The pollution evaluation indicated that significant Cd accumulation occurred in the paddy soils, with some areas showing light-to-moderate pollution levels. The enrichment coefficients of rice to soil Cd ranged from 0.004 to 1.72. Overall, the paddy soils in the studied area were considered generally safe with respect to Cd pollution, with low-risk areas distributed in the south, west, and east, whereas some medium-high risk areas were detected in eight towns.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Risk assessment Controlled terms:Bioaccumulation - Correlation methods - Food safety - Soil pollution - Soils - Zoning Uncontrolled terms:Brown rice - Case-studies - Cd pollution - Chongqing - Paddy soils - Plantings - Pollution index - Rice samples - Risks assessments - Safe planting zoning Classification code:461.6 Medicine and Pharmacology - 461.9 Biology - 483.1 Soils and Soil Mechanics - 822.3 Food Products - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Mass 1.00E-06kg to 1.60E-06kg, Mass 1.00E-06kg to 8.08E-07kg, Mass 2.00E-09kg, Mass 9.00E-08kg, Percentage 1.37E+01%, Percentage 3.50E+01% DOI:10.13227/j.hjkx.202101111 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065967 Title:Advances in Mechanism and Influencing Factors Affecting Hydrogen Sulfide Adsorption by Biochar Title of translation:生物炭吸附硫化氢机制与影响因素研究进展 Authors:Xu, Qi-Yong (1); Liang, Ming-Shen (1); Xu, Wen-Jun (1); Huang, Dan-Dan (1) Author affiliation:(1) School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen; 518055, China Corresponding author:Huang, Dan-Dan(huangdd@pkusz.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5086-5099 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Hydrogen sulfide(H2S)is one of the most common gas products from modern industrial processes. It is highly toxic, corrosive, and polluting, and poses harm to both the natural environment and human health if it is not properly removed. Biochar has been widely applied for the treatment of environmental pollution due to its excellent adsorption ability, low cost, and wide choice of source materials. Currently, although studies on hydrogen sulfide adsorption by biochar have attracted increasing attention, the factors involved are complex and varied, leading to a necessity to review and summarize the available knowledge and advances. To bridge the research gap, this paper presents the advances in H2S adsorption by biochar, including properties, influencing factors(i.e., biomass feedstock, pyrolysis temperature, residence time, and particle size), control measures(i.e., humidity, adsorption temperature, operating conditions, and modification of biochar by activation), and adsorption mechanism. The work will provide further reference for the preparation and optimization of biochar adsorption conditions to realize a highly efficient removal of H2S.
© 2021, Science Press. All right reserved. Number of references:126 Main heading:Sulfur determination Controlled terms:Corrosion - Gas adsorption - Humidity control - Hydrogen sulfide - Particle size Uncontrolled terms:Adsorption mechanism - Biochar - Control measures - Environmental pollutions - Gas product - Human health - Hydrogen sulfide adsorption - Industrial processs - Influence factor - Natural environments Classification code:801 Chemistry - 802.3 Chemical Operations - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202102035 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651063 Title:Shifts in Rhizosphere Bacterial Community Structure, Co-occurrence Network, and Function of Miscanthus Following Cadmium Exposure Title of translation:镉胁迫对芒草根际细菌群落结构,共发生网络和功能的影响 Authors:Chen, Zhao-Jin (1); Lin, Li-An (2); Li, Ying-Jun (2); Chen, Yan (2); Zhang, Hao (2); Han, Hui (2); Wu, Nai-Cheng (3); Fohrer, Nicola (3); Li, Yu-Ying (1); Ren, Xue-Min (2) Author affiliation:(1) International Joint Laboratory of Watershed Ecological Security and Collaborative Innovation Center of Water Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, School of Water Resources and Environmental Engineering, Nanyang Normal University, Nanyang; 473061, China; (2) School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang; 473061, China; (3) Department of Hydrology and Water Resources Management, University of Kiel, Kiel; 24098, Germany Corresponding author:Ren, Xue-Min(renxuemin2520@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3997-4004 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As a representative of second-generation bioenergy plants, Miscanthus has received increasing attention in the studies of heavy metal (HM)-contaminated soil remediation. Currently, few studies have examined the effects of using Miscanthus to remediate HM-contaminated soils on the composition and function of microbial communities. In this study, the Miscanthus cultivar M. saccariflorus was examined for its tolerance and enrichment abilities when grown in soils containing 100 mg•kg-1 of cadmium (Cd). The structure, function, and co-occurrence network of their rhizosphere bacterial communities were analyzed during the remediation process. MiSeq sequencing showed that the Miscanthus rhizosphere bacterial community comprised 32 phyla and 425 genera, including plant growth-promoting rhizobacteria (PGPR), such as Sphingomonas, Bacillus, Gemmatimonas, and Streptomyces. The addition of Cd affected the Miscanthus rhizosphere bacterial community and reduced community diversity. Phylogenetic molecular ecological networks indicated that Cd addition reduced the interactions between Miscanthus rhizosphere bacteria to generate a simpler network structure, increased the number of negative-correlation links, enhanced the competition between rhizosphere bacterial species, and changed the composition of key bacteria. PICRUSt functional predictive analysis indicated that Cd stress reduced soil bacterial functions in the Miscanthus rhizosphere. The results of this study provide a reference for the subsequent regulation of efficient Miscanthus remediation by PGPRs or key bacteria.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Soil pollution Controlled terms:Bacteria - Bacteriology - Cadmium - Predictive analytics - Remediation - Soil conservation - Soils Uncontrolled terms:Bacterial community - Bacterial community structure - Co-occurrence networks - Community diversity - Microbial communities - Negative correlation - Plant growth promoting rhizobacteria - Rhizosphere bacteria Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals DOI:10.13227/j.hjkx.202011198 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651072 Title:Analysis of the Continuous Heavy Pollution Process in the Winter of 2016 in Beijing, Tianjin, and Hebei Title of translation:2016冬季京津冀一次持续重度霾天气过程分析 Authors:Mao, Ye (1); Zhang, Heng-De (2); Zhu, Bin (3) Author affiliation:(1) School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) National Meteorological Centre, Beijing; 100081, China; (3) Collaborative Innovation Center for Meteorological Disaster Prediction and Assessment, Nanjing; 210044, China Corresponding author:Zhang, Heng-De(zhanghengde1977@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3615-3621 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
From December 16 to 21, 2016, continuous heavy haze occurred in the Beijing-Tianjin-Hebei region of China. To further understand the development mechanism of haze and improve the forecasting of haze events, a variety of data, background circulation, and the meteorological elements of this severe haze process were comprehensively analyzed. The results show that the process lasted for a long time, pollution intensity was high, influence area was wide, visibility was low, and external transport was the main cause. Aerosols were mainly distributed at a height of 600 m, and there was a certain extreme anomaly. The static weather index and air quality index showed a strong correlation. The air in the Beijing-Tianjin-Hebei region is controlled by zonal circulation in front of a high-pressure ridge, which maintains the westerly airflow. Cold-air activity is weak, and downflow is dominant. The water vapor content is low, the cloud cover is limited at high altitudes, and a warm ridge extends northwards at low altitudes. Limited static wind on the ground, high relative humidity, and low mixing-layer height are not conducive to the horizontal and vertical diffusion of pollutants.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Air quality Uncontrolled terms:Air quality indices - Beijing-tianjin-hebei regions - Development mechanisms - High relative humidities - High-pressure ridges - Meteorological elements - Mixing layer height - Water vapor contents Classification code:451.2 Air Pollution Control Numerical data indexing:Size 6.00e+02m DOI:10.13227/j.hjkx.202012028 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779856 Title:Combining Different Aerobic/Anoxic Durations with Zoned Sludge Discharge to Optimize Short-cut Nitrification Denitrifying Phosphorus Removal Granules in Domestic Sewage Title of translation:不同好氧/缺氧时长联合分区排泥优化生活污水短程硝化反硝化除磷颗粒系统运行 Authors:Wang, Wen-Qi (1); Li, Dong (1); Gao, Xin (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China Corresponding author:Li, Dong(lidong2006@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4406-4413 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, domestic sewage was used to inoculate mature short-cut nitrification denitrifying phosphorus removal particles, which were cultivated and matured under artificial water. The operation of the short-cut nitrification denitrifying phosphorus removal system was optimized using different aerobic/anoxic durations combined with zoned sludge discharge. The results showed that regulating the aerobic/anoxic duration, in combination with zoned sludge discharge, can realize the stable operation of the system. In the later stable period, the effluent COD concentration was below 50 mg•L-1, the effluent TN concentration was below 15 mg•L-1, the TN removal rate reached about 83% and remained stable, the effluent P concentration was below 0.5 mg•L-1, and the average P removal rate was 93.72%. At the same time, zoned sludge discharge (70% top sludge and 30% bottom sludge) can be used to screen out microorganisms, maintain good nitrosation and phosphorus removal performance, limit the particle size distribution, and ensure the growth advantages of AOB and DPAOs. Increases in the anoxic duration improved the growth rate of anoxic heterotrophic bacteria, causing them to secrete more EPS and ensuring granular sludge improvements and continued stability.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Sewage Controlled terms:Denitrification - Effluents - Nitrification - Particle size - Particle size analysis - Phosphorus Uncontrolled terms:Artificial water - Denitrifying phosphorus removal - Granular sludge - Growth advantages - Heterotrophic bacterias - Phosphorus removal - Sludge discharges - Stable operation Classification code:452.1 Sewage - 452.3 Industrial Wastes - 802.2 Chemical Reactions - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Mass_Density 1.50e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 3.00e+01%, Percentage 7.00e+01%, Percentage 8.30e+01%, Percentage 9.37e+01% DOI:10.13227/j.hjkx.202102182 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804511 Title:Source Apportionment and Optical Properties of Fine Particles Associated with Regional Pollution in the Yangtze River Delta Title of translation:长三角地区一次区域污染过程中细颗粒物的来源解析及其光学特性 Authors:Xia, Li (1, 2); Zhu, Bin (1, 2); Wang, Hong-Lei (1); Kang, Han-Qing (1) Author affiliation:(1) Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Experimental Teaching Center for Meteorology and Environment, Special Test Field of National Integrated Meteorological Observation, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Zhu, Bin(binzhu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:556-563 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to study the distribution and optical characteristics of fine particulate matter pollution in the Yangtze River Delta, PM2.5 samples were collected and analyzed from city (Suzhou), suburb (Nanjing), and regional background monitoring stations (Lin'an). The average concentrations of PM2.5 in Suzhou, Nanjing, and Lin'an were (169.8±56.5), (169.9±51.2), and (154.0±54.9) μg•m-3, respectively. There was little difference in meteorological conditions and the chemical composition of PM2.5 among the three sites, and PM2.5 pollution showed significant synchronization and regionalization characteristics. The extinction coefficients estimated using a chemical component method for Suzhou, Nanjing, and Lin'an are (561±223), (655±340), and (679±349) Mm-1, respectively. There is strong correlation between the extinction coefficients estimated by the chemical component method and those estimated by a visibility-based method (r 0.73-0.80). Using a PMF model to analyze the PM2.5 sources, secondary nitrate sources (32%) and secondary sulfate sources (25%) accounted for the largest proportions followed by biomass combustion (16%), incomplete combustion (7%), fuel combustion (7%), soil crusts (8%), and marine sources (5%). The primary sources of the extinction coefficients of PM2.5 are secondary nitrate and sulfate sources, incomplete combustion, and biomass combustion. Compared with the source contribution of mass concentrations, the proportion of secondary nitrate and sulfate sources decreased by approximately 4% and the proportion of the incomplete combustion source increased by 5%. These results show that there are differences in the contributions of various PM2.5 source according to mass concentrations and extinction coefficients.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:River pollution Controlled terms:Combustion - Fuels - Nitrates - Optical properties - Sulfur compounds Uncontrolled terms:Average concentration - Chemical compositions - Extinction coefficients - Fine particulate matter - Incomplete combustion - Meteorological condition - Optical characteristics - Source contributions Classification code:453 Water Pollution - 741.1 Light/Optics - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.60e+01%, Percentage 2.50e+01%, Percentage 3.20e+01%, Percentage 4.00e+00%, Percentage 5.00e+00%, Percentage 7.00e+00%, Percentage 8.00e+00% DOI:10.13227/j.hjkx.202006082 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779609 Title:Mutual Influence Between Microbial Community, Wastewater Characteristics, and Antibiotic Resistance Genes During Spiramycin Production Wastewater Treatment Title of translation:螺旋霉素废水处理过程中菌群结构, 水质特征及抗性基因之间关系分析 Authors:Wu, Cai-Yun (1, 2); Li, Hui-Li (2); Qin, Cai-Xia (1, 3); Tong, Juan (1, 3, 4); Wei, Yuan-Song (1, 3, 4) Author affiliation:(1) State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; (3) Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Tong, Juan(hittj@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4358-4365 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Wastewater from antibiotic production usually contains a huge amount of antibiotic resistance genes (ARG). Therefore, it is essential to study the dissemination and control of antibiotic resistance during the treatment of antibiotic production wastewater. The mutual influence between microbial community evolution, wastewater characteristics, and ARG was investigated using high-throughput sequencing and a variety of statistical analysis methods. Results showed that the influent characteristics had only a marginal influence on the microbial community of each treatment section. Methanogenic bacteria and sulfate-reducing bacteria were the dominant microbes in the anaerobic and anoxic tank. Chemical oxygen demand (COD), NO2--N, and PO43--P exhibited an intimate relationship with the microbial community, whereas biomass, NH4+-N, and COD showed a strong correlation with ARG and mobile genetic elements (MGE). In the sludge, more genera (including pathogenic bacteria) were significantly correlated with ARG and MGE than that in the wastewater, indicating that bacteria in the sludge had a greater chance of acquiring pathogenicity and resistance. Therefore, more attnetion should be given to waste sludge from the treatment plants of antibiotic production wastewater. This research could provide further understanding of antibiotic resistance dissemination and control during wastewater treatment, especially for antibiotic production wastewater.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Wastewater treatment Controlled terms:Anoxic water - Antibiotics - Bacteria - Chemical oxygen demand - Genes - Sewage treatment plants - Sulfur compounds - Waste treatment Uncontrolled terms:Antibiotic production - Antibiotic resistance - Antibiotic resistance genes - High-throughput sequencing - Influent characteristics - Statistical analysis methods - Sulfate reducing bacteria - Wastewater characteristics Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology DOI:10.13227/j.hjkx.202101086 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003351 Title:Composition and Distribution Characteristics of Microplastics in Danjiangkou Reservoir and Its Tributaries Title of translation:丹江口水库及其入库支流水体中微塑料组成与分布特征 Authors:Pan, Xiong (1, 2); Lin, Li (1, 2); Zhang, Sheng (1, 2); Zhai, Wen-Liang (1, 2); Tao, Jing-Xiang (1, 2); Li, Dan-Wen (1, 3) Author affiliation:(1) Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Wuhan; 430010, China; (2) Key Laboratory of Basin Water Resource and Eco-Environmental Science in Hubei Province, Wuhan; 430010, China; (3) School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan; 430074, China Corresponding author:Lin, Li(linli1229@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1372-1379 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Microplastic pollution is a hot topic in environmental science. To explore the microplastics in Danjiangkou Reservoir, a national first-class water source protection area, we studied their types, abundance, and material characteristics using density flotation and micro-Raman spectroscopy. The spatial distribution characteristics of microplastics were also revealed according to the hydrologic and hydrodynamic conditions of the reservoir. The results showed that the main types of microplastics were fragments (84.2% of the total), granules, films, and fibers, of which 84.2% were fragments. The numbers of each type of microplastic were significantly different in different areas. A variety of colors were observed, with transparent and brown microplastic being most common. During the wet season, the average abundance of microplastics in the reservoir was 7 248 n•m-3, which is higher than that observed in the Han Reservoir. The particle sizes of the microplastics in the research area ranged 75-4 703 μm, of which 73.4% had a particle size of less than 500 μm; microplastic abundance was inversely related to particle size. Nylon was the most common form of microplastic in Danjiangkou Reservoir, accounting for 36.4% of the total, followed by polyethylene (PE) and polypropylene (PP).
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Microplastic Controlled terms:Flotation - Particle size - Polypropylenes - Reservoirs (water) Uncontrolled terms:Danjiangkou reservoir - Distribution characteristics - Environmental science - Hydrodynamic conditions - Material characteristics - Micro Raman Spectroscopy - Microplastics - Water source Classification code:441.2 Reservoirs - 802.3 Chemical Operations - 815.1.1 Organic Polymers Numerical data indexing:Percentage 3.64e+01%, Percentage 7.34e+01%, Percentage 8.42e+01%, Size 7.50e-05m to 4.70e-03m DOI:10.13227/j.hjkx.202006123 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003375 Title:Characteristics and Evaluation of Soil Rare Earth Element Pollution in the Bayan Obo Mining Region of Inner Mongolia Title of translation:内蒙古白云鄂博矿区土壤稀土元素污染特征及评价 Authors:Wang, Zhe (1); Zhao, Ying-Chen (1); Luo, Yi-Fei (2); Zheng, Chun-Li (1); Bian, Yuan (1); Zhang, Guang-Yu (1) Author affiliation:(1) School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou; 014010, China; (2) School of Environment, Beijing Normal University, Beijing; 100875, China Corresponding author:Zheng, Chun-Li(zhengchunli1979@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1503-1513 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Bayan Obo deposit is the largest light rare earth ore deposit in the world, which releases rare earth elements (REEs) to the surrounding environment through long-term mining processes. To inform restoration plans, it is necessary to investigate the concentration, spatial distribution, pollution level, and ecological risk of REEs. Sample analyses showed that the average total concentration of REEs in this area is 6 064.95 mg•kg-1, which was higher than the background levels of control soils (207.44 mg•kg-1), Inner Mongolia (150.95 mg•kg-1), and China (184.72 mg•kg-1). Light REEs (LREEs) accounted for 83%-99% of the detected REE, and Ce was the dominant element. Areas with high REE concentrations were mainly located near the source bed, and the distribution was extremely inhomogeneous, being greatly affected by external interference. Chondrite normalized REE patterns of different functional areas were similar and normalized curves inclined to the right, indicating district fractionation between the LREE and heavy REEs (HREEs). Significant negative Eu anomalies and positive Ce anomalies were observed in the soils based on δCe and δEu values. La/Yb, La/Sm, and Gd/Yb ratios all indicated that the soils were LREE-enriched, whereas the LREEs were more fractionated than the HREE. Four methods were employed to evaluate the pollution and ecological risk of the detected soil REEs. The average values of Ce, Nd, Pr, and La reached heavily contaminated levels based the geo-accumulation index (Igeo). The modified degree of contamination method showed that the average mCd values of REEs in different functional areas ranged from 7.14 to 31.38. The tailings pond had a high level of pollution, residential and industrial areas had a very high pollution level, and the mining area and waste dump showed extremely high levels of pollution. Based on the pollution load index, the tailings pond is moderately polluted while all other functional areas are severely polluted. The potential ecological risk index values ranged from 120.99 to 6 376.46, with REEs in soils posing high strong risk, very strong risk, strong risk, moderate risk, and low risk in 33%, 16%, 12%, 30%, and 9% of the sampling sites, respectively. Based on these findings, measures for controlling current pollution and potential ecological risks from REE in the soils of the Bayan Obo mining region are urgently needed.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Soil pollution Controlled terms:Deposits - Lakes - Ore deposits - Rare earth elements - Rare earths - Risk assessment - Soils Uncontrolled terms:Contamination methods - Controlling current - External interference - Geo-accumulation index - Pollution load indices - Potential ecological risk - Rare earth elements (REEs) - Surrounding environment Classification code:483.1 Soils and Soil Mechanics - 547.2 Rare Earth Metals - 804.2 Inorganic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.20e+01%, Percentage 1.60e+01%, Percentage 3.00e+01%, Percentage 3.30e+01%, Percentage 8.30e+01% to 9.90e+01%, Percentage 9.00e+00% DOI:10.13227/j.hjkx.202008129 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003253 Title:Effect of Water Regimes on Pb and Cd Immobilization by Biochar in Contaminated Paddy Soil Title of translation:水分条件对生物炭钝化水稻土铅镉复合污染的影响 Authors:Tang, Jia-Qing (1); Zhang, Xu (1); Huang, Guo-Yong (1); Hu, Hong-Qing (1) Author affiliation:(1) College of Resources and Environment, Huazhong Agricultural University, Wuhan; 430070, China Corresponding author:Hu, Hong-Qing(hqhu@mail.hzau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1185-1190 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An incubation experiment was conducted to explore the influence of 30% water holding capacity (WHC), flooding, and alternate dry-wet conditions on changes in heavy metal fractions with 1% rice straw biochar in Pb and Cd co-contaminated paddy soils, to provide a scientific basis for a water regime of biochar remediation on heavy metal contaminated paddy soil. Results showed that flooding and alternating wet-dry conditions could significantly increase soil pH, the contents of dissolved organic carbon (DOC), and amorphous iron oxide (Feo) after adding biochar. Compared with a 30% WHC treatment, when the soil is flooded and alternating wet-dry conditions, the content of the TCLP extractable Pb decreased by 31.87% and 20.33%, respectively, and the content of the TCLP extraction Cd decreased by 25.29% and 16.07%, respectively. Under flooding, the acid soluble Pb and Cd content decreased by 24.78% and 20.14%, respectively, and the acid soluble Cd content decreased over time. The decreasing order of available Pb and Cd content was flooding>alternating dry-wet>30% WHC. Correlation analysis results showed that soil pH and Feo have significant negative correlation with available heavy metals, which means flooding with biochar could effectively immobilize Pb and Cd by increasing soil pH and Feocontent. Flooding and biochar have a synergistic interaction on promoting the transformation of Pb and Cd to more stable fractions in acidic co-contaminated heavy metal polluted paddy soil.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Soil pollution Controlled terms:Cadmium - Contamination - Floods - Iron oxides - Lead - Organic carbon - Soils Uncontrolled terms:Amorphous iron oxides - Correlation analysis - Dissolved organic carbon - Heavy metal fractions - Negative correlation - Scientific basis - Synergistic interaction - Water holding capacity Classification code:483.1 Soils and Soil Mechanics - 546.1 Lead and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.00e+00%, Percentage 1.61e+01%, Percentage 2.01e+01%, Percentage 2.03e+01%, Percentage 2.48e+01%, Percentage 2.53e+01%, Percentage 3.00e+01%, Percentage 3.19e+01% DOI:10.13227/j.hjkx.202010127 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779588 Title:Isolation and Identification of the Plant Endophyte R-13 and Its Effect on Cadmium Accumulation in Solanum nigrum L. Title of translation:1株草螺属植物内生菌R-13的分离鉴定及对龙葵吸收土壤镉的影响 Authors:Pang, Jie (1, 2); Liu, Yue-Min (1); Huang, Yong-Chun (2); Wang, Chang-Rong (2); Liu, Bin (3); Liu, Zhong-Qi (2); Huang, Yi-Zong (2); Huang, Yan-Fei (3); Zhang, Chang-Bo (2) Author affiliation:(1) School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin; 300384, China; (2) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (3) Agricultural Resources and Environment Institute, Guangxi Academy of Agricultural Sciences, Nanning; 530007, China Corresponding authors:Liu, Yue-Min(lyuemn@126.com); Huang, Yong-Chun(nylab@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4471-4480 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The combination of endophytes and hyperaccumulator plants can significantly improve the efficiency of heavy metal phytoremediation in contaminated soil. A plant endophyte named Herbaspirillum R-13 was isolated from rice roots in a cadmium (Cd) contaminated paddy field. This strain exhibited a strong tolerance to Cd2+ and could grow on a solid medium with a Cd2+ concentration of 300 mg•kg-1. The R-13 strain was able to produce siderophores and Indole acetic acid (IAA), through color reactions. In addition, Pikovskaya's and Ashby's solid medium tests showed that the R-13 strain had a lower capacity for dissolving phosphorus but a higher capacity for fixing nitrogen. In the pot experiment, high-throughput sequencing technology was used to track the colonization of the R-13 strain in Solanum nigrum L. roots. Three days after inoculation, the relative abundance of Herbaspirillum in the root of Solanum nigrum L. had increased by 201.88% compared to the blank control (CK) and after two inoculations, the relative abundance of Herbaspirillum in the root of Solanum nigrum L. had increased by 1182.44% compared to CK. The relative abundance of Herbaspirillum in the root of Solanum nigrum L. began to decrease significantly from 5 days after inoculation. Inoculation with 20 mL•pot-1 of R-13 fermentation broth resulted in no significant effects on the Cd content of roots, stems, leaves, or fruits of S. nigrum L. With 40 mL•pot-1 of fermentation broth, the Cd content of vegetative organs and fruits was significantly increased. When it reached 200 mL•pot-1, the Cd content of vegetative organs was the highest, with Cd concentrations in the roots, stems, leaves, and fruits increasing by 84.42%, 43.67%, 64.06%, and 20.29%, respectively. In conclusion, root inoculation with endophytic Herbaspirillum R-13 can significantly increase the relative content of Herbaspirillum in the root system and enhance Cd absorption of S. nigrum L. Therefore, this strain has excellent prospects for application in the phytoremediation of soil contaminated with Cd.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Soil pollution Controlled terms:Bioremediation - Cadmium - Fermentation - Fruits - Plants (botany) Uncontrolled terms:Cd concentrations - Contaminated soils - Fermentation broths - High-throughput sequencing - Hyperaccumulator plant - Indoleacetic acid - Isolation and identification - Relative abundance Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4 Agricultural Products Numerical data indexing:Age 1.37e-02yr, Percentage 1.18e+03%, Percentage 2.02e+02%, Percentage 2.03e+01%, Percentage 4.37e+01%, Percentage 6.41e+01%, Percentage 8.44e+01% DOI:10.13227/j.hjkx.202101192 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247466 Title:In-situ Phosphorus Removal Activity and Impact of the Organic Matter Concentration on Denitrifying Phosphorus Removal in Sludge Aggregates Title of translation:反硝化除磷污泥聚集体内原位除磷活性及有机物浓度的影响 Authors:Lü, Yong-Tao (1, 2); Jiang, Xiao-Tong (1, 2); Tu, Yan (1, 2); Wang, Xu-Dong (1, 2); Pan, Yong-Bao (3); Liu, Shuang (3); Cui, Shuang-Ke (3); Wang, Lei (1, 2) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Membrane Separation of Shaanxi Province, Research Institute of Membrane Separation Technology of Shaanxi Province, Xi'an; 710055, China; (3) Shaanxi Modern Architecture Design & Research Institute, Xi'an; 710024, China Corresponding author:Wang, Lei(wl0178@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2396-2401 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this work, the redox potential, dissolved oxygen, and phosphate microelectrodes were used to quantitatively study the in-situ activity of dephosphorization bacteria and the impact of the organic matter concentration on denitrifying phosphorus removal in sludge aggregates in a sequencing batch reactor. The results showed that the maximum net volume release rate of phosphorus was 3.29 mg•(cm3•h)-1 in the initial anaerobic sludge aggregates, which was approximately 3 times the maximum net volume uptake rate of phosphorus at the initial anoxic stage. The release rate of phosphorus clearly decreased at the final anaerobic stage, and the maximum net volume release rate of phosphorus was only half of that at the initial anaerobic stage. At the final anoxic stage, the maximum net volume uptake rate of phosphorus decreased to 0.14 mg•(cm3•h)-1, and the phenomenon of secondary phosphorus release occurred in the deep area below 1 800 μm. When the concentration of COD decreased from 350 mg•L-1 to 250 mg•L-1 and 150 mg•L-1, the maximum net volume release rate of phosphorus of dephosphorization bacteria decreased from 3.27 mg•(cm3•h)-1 to 2.44 mg•(cm3•h)-1 and 2.01 mg•(cm3•h)-1, respectively, and the rapid uptake area of phosphorus narrowed to the surface of the sludge aggregates.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Phosphorus Controlled terms:Aggregates - Anoxic water - Bacteria - Batch reactors - Biogeochemistry - Denitrification - Dissolved oxygen - Microelectrodes - Organic compounds - Redox reactions Uncontrolled terms:Anaerobic sludge - Denitrifying phosphorus removal - Dephosphorization - Phosphorus release - Phosphorus removal - Redox potentials - Release rate - Sequencing batch reactors Classification code:406 Highway Engineering - 481.2 Geochemistry - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.50e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 3.50e-01kg/m3 to 2.50e-01kg/m3, Size 1.80e-03m DOI:10.13227/j.hjkx.202010109 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003254 Title:Sources and Distribution Characteristics of HCBD in Rapid Economic Development Areas Title of translation:经济快速发展区六氯丁二烯的来源与分布特征 Authors:Tao, Yu-Ming (1, 2); Meng, Jing (2, 3); Li, Qian-Qian (2, 3); Shi, Bin (2, 3); Su, Gui-Jin (2, 3); Guo, Li-Xin (1) Author affiliation:(1) School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun; 130022, China; (2) Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding authors:Su, Gui-Jin(gjsu@rcees.ac.cn); Guo, Li-Xin(guolixin@cust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1053-1064 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to understand the sources and distribution characteristics of hexachlorobutadiene (HCBD) in the Yangtze River Delta (YRD), Beijing-Tianjin-Hebei (BTH), and Pearl River Delta (PRD), the emission sources, as well as their distribution in water and soil were analyzed based on the production levels of chlorinated hydrocarbons and wastewater discharge in the three regions. The results showed that the by-products of trichloroethylene (TCE) and tetrachloroethylene (PCE) and wastewater treatment plants were the main sources of HCBD in the three regions. In 2018, the total emissions of HCBD from by-products of TCE and PCE in the three regions were 498.46 t, among which the proportion of by-products of TCE was 66.9%. The HCBD emissions of the three regional industrial and domestic wastewater treatment plants were 628.9 kg and 254.6 kg, respectively. The emissions of HCBD from hydrocarbon chlorination production and wastewater treatment plants in YRD were significantly higher at 497.8 t and 648 kg, respectively, while the emissions from the two sources in BTH were 0.37 t and 125 kg, respectively, and in PRD they were 0.29 t and 110.3 kg, respectively. The average concentrations of HCBD in the natural water of YRD, BTH and PRD were 0.35, 0.25, and 0.64 μg•L-1, respectively, and in the drinking water concentrations were 0.16, 0.09, and 0.04 μg•L-1, respectively. The overall level of HCBD in urban drinking water was relatively low. The concentrations of HCBD in industrial soil were significantly higher than in farmland soil, at 9.3-24.6 ng•g-1 and 0.13-2.67 ng•g-1, respectively. Similar to the situation in water bodies, HCBD pollution in the soil of YRD was the most serious, which was related to the fact that HCBD emissions in YRD were significantly higher than in BTH and PRD.
© 2021, Science Press. All right reserved. Number of references:96 Main heading:Soil pollution Controlled terms:Hydrocarbons - Industrial emissions - Industrial water treatment - Potable water - Reclamation - River pollution - Sewage pumping plants - Sewage treatment plants - Soils - Surface waters - Wastewater treatment - Water treatment plants Uncontrolled terms:Average concentration - Chlorinated hydrocarbon - Distribution characteristics - Domestic wastewater treatment plants - Tetrachloroethylenes - Wastewater discharge - Wastewater treatment plants - Water concentrations Classification code:444 Water Resources - 444.1 Surface Water - 445.1 Water Treatment Techniques - 445.1.2 Water Treatment Techniques for Industrial Use - 451.1 Air Pollution Sources - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds Numerical data indexing:Mass 1.10e+02kg, Mass 1.25e+02kg, Mass 2.55e+02kg, Mass 6.29e+02kg, Mass 6.48e+02kg, Mass_Density 4.00e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 6.40e-07kg/m3 to 2.20e-02kg/m3, Percentage 6.69e+01% DOI:10.13227/j.hjkx.202009084 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804519 Title:Effect of Check Dam on Phosphorus Transport and Retention in the Qingshui River, in Zhangjiakou City Title of translation:张家口清水河拦沙坝对磷输移-滞留的影响 Authors:Wang, Wei (1, 2); Li, Xu-Yong (1, 2) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Li, Xu-Yong(xyli@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:681-687 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The transport and retention of phosphorus is a key process in nutrient cycling in river ecosystems and one of the main indicators used to evaluate river health. To explore the effect of check dams on the transport and retention of phosphorus, water samples were collected from four representative monitoring sections of a check-dammed reach of the Qingshui River in Zhangjiakou City. Various forms of phosphorus and runoff process were monitored, and local real-time rainfall data were also collected. The results showed that: ① The average concentration ratios of total phosphorus (TP), total dissolved phosphorus (TDP), total particulate phosphorus (TPP), and total suspended solids (TSS) downstream to upstream of the dam were 50%, 79%, 47%, and 58%, respectively, indicating that the check dam has a retention effect on phosphorus and sediment. ② During non-rainfall periods, TP, TDP, and TPP were retained in the check dam reach, while these forms of phosphorus were both retained and transported in the check dam reach during period of rainfall; the ratio of TP, TDP, and TPP retaining rainfall events to total rainfall events was 63.6%, 9%, and 81.8%, respectively, indicating that the transport-retention process was affected by the time interval, duration, and intensity of rainfall events. ③ When a single rainfall event or continuous event exceeded 56 mm, the retention effect of the check dam notably decreased.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Rivers Controlled terms:Dams - Ecosystems - Phosphorus - Rain - Suspended sediments Uncontrolled terms:Average concentration - Nutrient cycling - Particulate phosphorus - Phosphorus transport - Retention process - Total dissolved phosphorus - Total phosphorus - Total suspended solids Classification code:441.1 Dams - 443.3 Precipitation - 454.3 Ecology and Ecosystems - 483 Soil Mechanics and Foundations - 804 Chemical Products Generally Numerical data indexing:Percentage 4.70e+01%, Percentage 5.00e+01%, Percentage 5.80e+01%, Percentage 6.36e+01%, Percentage 7.90e+01%, Percentage 8.18e+01%, Percentage 9.00e+00%, Size 5.60e-02m DOI:10.13227/j.hjkx.202006160 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688840 Title:Response of Microbial Biomass Carbon and Nitrogen and Rice Quality in a Yellow Soil Paddy Field to Biochar Combined with Nitrogen Fertilizer Title of translation:黄壤稻田土壤微生物量碳氮及水稻品质对生物炭配施氮肥的响应 Authors:Shi, Deng-Lin (1); Wang, Xiao-Li (1); Liu, An-Kai (1, 2); Hou, Zai-Fen (3); Liang, Guo-Tai (3) Author affiliation:(1) College of Agriculture, Guizhou University, Guiyang; 550025, China; (2) Department of Agriculture and Rural Affairs of Guizhou Province, Guiyang; 550001, China; (3) Agriculture and Rural Bureau of Sinan County, Guizhou Province, Tongren; 565100, China Corresponding author:Wang, Xiao-Li(xlwang@gzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:443-449 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effects of biochar combined with nitrogen fertilizer on soil microbial carbon, nitrogen (SMBC, SMBN), and rice yield and quality were investigated to provide a scientific basis for soil fertilization and nitrogen fertilizer reduction. Using a field experiment, we set up a nitrogen reduction gradient (T0-T4): 0, 10%, 20%, 30%, and 40% reductions. The same amount of biochar nitrogen was used as the substitute and no nitrogen fertilizer was used as the control (CK). The yield was measured and sampled at the mature stage of rice, and the samples were analyzed in the laboratory. The results showed that the range of SMBC and SMBN was 208.42-303.16 mg•kg-1 and 32.28-54.73 mg•kg-1, respectively. SMBC, SMBN, soil microbial entropy (qMB), soil microbial biomass nitrogen to total nitrogen ratio (SMBN/TN), and rice yield increased first and then decreased as the proportion of biochar and nitrogen fertilizer increased. SMBC, SMBN, and rice yield were all the highest in T2, which increased successively by 28.0%, 30.0%, and 13.4% compared with that of the T0 treatment (P<0.05), while those of the T4 treatment decreased slightly (P>0.05). The processing of SMBC, qMB, SMBN, and SMBN/TN showed a significantly positive relationship between the two (P<0.01). Compared with that of the T0 treatment, the T2 treatment significantly increased the Milled rice, gel consistency, and amylose content. In this study, the combination of biochar (5.0 t•hm-2) and nitrogen reduction (20%) effectively improved soil microbial carbon and nitrogen content and increased the yield and quality of rice, which could be a good choice for reducing nitrogen fertilization and increasing the efficiency of rice in a yellow soil paddy field in Guizhou.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Nitrogen fertilizers Controlled terms:Carbon - Soils Uncontrolled terms:Field experiment - Gel consistencies - Microbial biomass carbon and nitrogen - Nitrogen fertilization - Nitrogen reduction - Scientific basis - Soil fertilization - Soil microbial biomass nitrogens Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally Numerical data indexing:Percentage 1.00e+01%, Percentage 1.34e+01%, Percentage 2.00e+01%, Percentage 2.80e+01%, Percentage 3.00e+01%, Percentage 4.00e+01% DOI:10.13227/j.hjkx.202005186 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688832 Title:Source Apportionment of Ambient Carbonyl Compounds Based on a PMF and Source Tracer Ratio Method: A Case Based on Observations in Nanjing Title of translation:基于PMF和源示踪物比例法的大气羰基化合物来源解析:以南京市观测为例 Authors:Hu, Kun (1); Wang, Ming (1); Wang, Hong-Li (2); Jing, Sheng-Ao (2); Chen, Wen-Tai (3); Lu, Xing-Dong (1) Author affiliation:(1) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) Nanjing Intelligent Environmental Sci-Tech Co., Ltd., Nanjing; 211800, China Corresponding author:Wang, Ming(wangming@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:45-54 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ambient carbonyl compounds play an important role in tropospheric atmospheric chemistry. Primary emissions and photochemical formation are both sources of carbonyls, and therefore it is challenging work to analyze their sources. In this study, carbonyl sources were apportioned using the source tracer ratio method (STR) and positive matrix factorization model (PMF) based on offline carbonyls observations at a site in Nanjing during March 2017. Eleven carbonyl compounds were detected, and their total concentrations were in the range of 2.57×10-9-22.83×10-9. Formaldehyde, acetaldehyde, and acetone were the main components, accounting for 36.8%, 21.6%, and 18.5% of the average concentration of eleven carbonyl compounds, respectively. The influences of tracer selection and background concentrations on the results of source apportionment using the STR method based on comparing the results of acetylene and toluene as tracers and the 5th and 10th percentages as background concentrations are presented. Five sources were resolved by PMF, including traffic emission, the petrochemical & chemical industry, paint & solvent use, secondary formation & background, and the chemical industry. Secondary formation & background sources were the largest contributors of carbonyl compounds, contributing 56.4%, 48.2%, and 58.3% to formaldehyde, acetaldehyde, and acetone, respectively. By comparing the carbonyl source apportionment results by STR and PMF, it was found that the STR depends on the selection of tracers. When the STR is applied in the areas with complex sources, it is difficult to use a tracer to indicate anthropogenic source emissions, and therefore it is not a suitable method for carbonyl source apportionment.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Tracers Controlled terms:Acetaldehyde - Acetone - Atmospheric chemistry - Chemical industry - Factorization - Formaldehyde - Photochemical forming Uncontrolled terms:Anthropogenic sources - Average concentration - Background concentration - Complex sources - Positive matrix factorization models - Primary emissions - Source apportionment - Traffic emissions Classification code:443.1 Atmospheric Properties - 804.1 Organic Compounds - 805 Chemical Engineering, General - 921 Mathematics Numerical data indexing:Percentage 1.85e+01%, Percentage 2.16e+01%, Percentage 3.68e+01%, Percentage 4.82e+01%, Percentage 5.64e+01% DOI:10.13227/j.hjkx.202005224 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804546 Title:Water-air Carbon Dioxide Exchange and Nutritional Controls in a Typical Karst River Title of translation:典型喀斯特河流水-气界面二氧化碳交换特性及其营养调控因素 Authors:Liu, Rui (1, 2); Zhang, Jin (1); Chen, Zu-Sheng (3); Ni, Mao-Fei (3); Liu, Wen-Sheng (4) Author affiliation:(1) College of Geography and Tourism, Chongqing Normal University, Chongqing; 401331, China; (2) Key Laboratory of GIS Application, Chongqing Normal University, Chongqing; 401331, China; (3) College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang; 550025, China; (4) Environmental Monitoring Center Station of Bijie City, Bijie; 551700, China Corresponding author:Ni, Mao-Fei(nimaofei000@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:740-748 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore water-air carbon dioxide (CO2) exchange and its nutritional controls in karst rivers, water sampling and analyses were conducted in the Furong River as a representative karst river system. Regional hydrometeorological characteristics, carbonate system parameters, total organic carbon (TOC), nutrients and their stoichiometric ratios, and the riverine pressure of aqueous CO2 (pCO2) and its couplings to trophic status were analyzed. The results showed that gas transfer velocity of CO2 (k) varied between 2.71 and 13.0 m•d-1. Riverine pCO2 varied from 78.5 Pa to 21 491.2 Pa and was significantly higher in the tributaries than the main stem. Riverine TOC, total nitrogen (TN), and total phosphorus (TP) concentrations were (302.8±50.1), (128.9±67.9), and (0.65±0.98) μmol•L-1, respectively, demonstrating the trophic status of P-limitation. Riverine pCO2 was tightly linked to P-related parameters, suggesting that in-situ metabolism triggered aquatic CO2 supersaturation. Water-air CO2 flux (F) averaged (534.5±801.4) mmol•(m2•d)-1 in the Furong River, which is higher than most of the world's rivers, and thus indicates high potential CO2 emissions.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Carbon dioxide Controlled terms:Landforms - Organic carbon - Rivers Uncontrolled terms:Carbon dioxide exchange - Carbonate system - High potential - Stoichiometric ratio - Total nitrogen - Total Organic Carbon - Total phosphorus - Trophic status Classification code:481.1 Geology - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Pressure 4.91e+02Pa DOI:10.13227/j.hjkx.202006173 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804550 Title:Characteristics and Source Apportionment of Volatile Organic Compounds (VOCs) in the Automobile Industrial Park of Shanghai Title of translation:汽车工业区大气挥发性有机物(VOCs)变化特征及来源解析 Authors:Ye, Lu (1); Tai, Qing-Qing (1); Yu, Hua-Ming (1) Author affiliation:(1) Jiading District Environmental Monitoring Station, Shanghai; 201822, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:624-633 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Volatile organic compounds (VOCs) are important precursors of ozone and fine particulate matter, and have attracted more and more research attention. There are few long-term observational studies of VOCs in automobile industry parks. From January 1 to December 31, 2019, 79 kinds of VOCs were quantitatively detected by on-line gas chromatograph in an automobile industrial park in Shanghai. The composition, seasonal variation, and daily variation of VOCs were analyzed. The chemical reactivity of the atmosphere was estimated using the maximum incremental reactivity (MIR) and •OH radical loss rate. The sources of VOCs were analyzed using specific pollutant ratios and factor analysis. The results showed that the total VOCs concentration was 26.53×10-9, with alkanes, alkenes, aromatics, halo hydrocarbon, and alkynes accounting for 50.2%, 9.8%, 22.4%, 10.8%, and 6.8%, respectively. There was an obviously seasonal variation in VOCs concentrations, with the maximum occurring in winter and the minimum in summer. Ozone formation potential (OFP) was 73.2×10-9, of which alkanes accounted for 14.7%, alkenes 35.9%, and aromatics 45.2%. The •OH radical loss rate was 165.3 s-1, of which alkenes accounted for 30.4% and aromatics 48.9%. The components with the highest contributions to chemical reaction activity were m/p-xylene, ethylene, propylene, toluene, and o-xylene. By estimating toluene/benzene ratios (T/B) and ethane/acetylene ratios (E/E), the air mass at the observation site was fresh, site was close to the pollution source. The main sources of VOCs were gasoline exhaust emissions (19.4%), solvent use (30.8%), combustion processes (11.0%), diesel use (8.9%), and liquefied petroleum gas use (4.5%).
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Automobiles Controlled terms:Air pollution - Aromatization - Ethylene - Free radicals - Gas chromatography - Gas emissions - Gasoline - Ozone - Paraffins - Toluene - Volatile organic compounds Uncontrolled terms:Combustion pro-cess - Fine particulate matter - Gas chromatographs - Maximum incremental reactivities - Observational study - Ozone formation potentials - Source apportionment - Toluene/benzene ratio Classification code:451 Air Pollution - 523 Liquid Fuels - 662.1 Automobiles - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.08e+01%, Percentage 1.10e+01%, Percentage 1.47e+01%, Percentage 1.94e+01%, Percentage 2.24e+01%, Percentage 3.04e+01%, Percentage 3.08e+01%, Percentage 3.59e+01%, Percentage 4.50e+00%, Percentage 4.52e+01%, Percentage 4.89e+01%, Percentage 5.02e+01%, Percentage 6.80e+00%, Percentage 8.90e+00%, Percentage 9.80e+00% DOI:10.13227/j.hjkx.202005207 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247425 Title:High-Throughput Sequencing Analysis of Microbial Communities in Summertime Atmospheric Particulate Matter in Hefei City Title of translation:合肥市夏季大气颗粒物中微生物群落的高通量测序分析 Authors:Jiang, Shao-Yi (1); Sun, Bo-Wen (1); Dai, Hai-Tao (1); Wang, Run-Fang (2); Ma, Da-Wei (2); Zhu, Ren-Bin (1) Author affiliation:(1) Institute of Polar Environment & Anhui Key Laboratory of Polar Environment and Global Change, School of Earth and Space Sciences, University of Science and Technology of China, Hefei; 230026, China; (2) State Grid Anhui Electric Power Research Institute, Hefei; 230601, China Corresponding author:Zhu, Ren-Bin(zhurb@ustc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2169-2178 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The composition, physical and chemical properties, sources, and temporal and spatial changes in airborne particulate matter have been extensively investigated in previous studies. However, less is known about bioaerosols, which are mainly composed of bacteria and fungi and constitute up to 25% of the total airborne particulate matter. In this study, we used inductively coupled plasma mass spectrometry and ion chromatography to determine the concentrations of trace elements and water-soluble ions in atmospheric particulates, respectively. These analyses were combined with high-throughput sequencing methods and real-time quantitative polymerase chain reaction to analyze the microbial compositions in PM1.0, PM2.5, and PM10 samples, which were collected from July to September in Hefei City. The results showed that there were no significant differences in the bacterial community diversity across the three size fractions (analysis of variance (ANOVA), P>0.05). The bacterial and fungal community diversities on sunny days were lower than those on rainy days, and the bacterial community diversity in all samples was significantly higher than the fungal community diversity (ANOVA, P<0.01). The predominant bacterial phyla were Proteobacteria (46.19%), Firmicutes (33.42%), Bacteroidetes (10.99%), Cyanobacteria (3.33%), and Actinobacteria (2.11%). Ascomycota (73.23%), Basidiomycota (5.78%), Mortierellomycota (3.41%), and Mucoromycota (0.10%) were the dominant fungal phyla. Our results indicated that soils, plant leaves, and animal feces were the dominant sources of airborne bacterial communities in Hefei City, and the main sources of the fungal communities were plant leaves and soils. The bacterial community was mainly affected by K, Pb, Al, Fe, Mg, Ca, Na+, NO2-, and wind speed, and the main influencing factors of the fungal community were V, Mn, Sr, NO2-, NO3-, Na+, Cl-, the air quality index, and PM10. In addition, nine specific bacteria and fungi that are linked to human health risks were identified, including Acinetobacter, Streptococcus, Enterobacter, Pseudomonas, Delftia, Serratia, Trichoderma, Alternaria, and Aspergillus, which can lead to a wide range of diseases in humans and other organisms. The research results are helpful for revealing the various characteristics of airborne microbial communities, their influencing factors, and their impacts on human health, and are an important reference for subsequent research and the formulation of government policies.
© 2021, Science Press. All right reserved. Number of references:47 Main heading:Particles (particulate matter) Controlled terms:Air quality - Analysis of variance (ANOVA) - Atmospheric chemistry - Bacteria - Fungi - Health risks - Ion chromatography - Mass spectrometry - Nitrogen oxides - Polymerase chain reaction - Trace elements - Wind Uncontrolled terms:Airborne particulate matters - Atmospheric particulate - Atmospheric particulate matter - High-throughput sequencing - Microbial communities - Physical and chemical properties - Quantitative polymerase chain reaction - Temporal and spatial changes Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 461.7 Health Care - 801 Chemistry - 801.2 Biochemistry - 804.2 Inorganic Compounds - 922 Statistical Methods - 951 Materials Science Numerical data indexing:Percentage 1.00e-01%, Percentage 1.10e+01%, Percentage 2.11e+00%, Percentage 2.50e+01%, Percentage 3.33e+00%, Percentage 3.34e+01%, Percentage 3.41e+00%, Percentage 4.62e+01%, Percentage 5.78e+00%, Percentage 7.32e+01% DOI:10.13227/j.hjkx.202009012 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582402 Title:Effect of Rate of Salinity Increase on the Performance and Microbial Community Structure of Sequencing Batch Reactors Title of translation:提盐速率对序批式生物反应器性能和微生物群落结构的影响 Authors:Gu, Bai-Ming (1); Jin, Chun-Ji (1, 2); Wen, Chun (1); Hou, Jin-Yuan (1); Zhao, Yang-Guo (1, 2); Gao, Meng-Chun (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (2) Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China Corresponding author:Jin, Chun-Ji(jinhou@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3413-3421 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, three sequence batch reactors were selected to evaluate the effects of salt-tolerant activated sludge acclimation. The effect of salinity increase rate on pollutant removal, physicochemical characteristics of activated sludge, and microbial community were investigated. The results showed that a rapid salinity increase to 30‰ (within 30 d) reduced removal efficiencies of COD and NH4+-N from 85.5% and 98.5% (18 d) to 72.2% and 81.7% (51 d), respectively. In comparison, a slower salinity increases to 30‰ (within 90 d) had a minor effect on COD and NH4+-N removal. During the rapid salinity increase, a stable shortcut nitrification occurred under 20‰ salinity, in which the effluent NO2--N reached 11.13 mg•L-1 and NO3--N decreased to 0.56 mg•L-1. When salinity increased to 30‰, the nitrite accumulation rate was about 90%, and the removal efficiency of total nitrogen increased to approximately 75%. The contents of polysaccharide and protein in extracellular polymer substances increased as salinity increased, and the polysaccharide content increased significantly when the salinity was higher than 15‰. High-throughput sequencing results illustrated that microbial diversity reduced as salinity increased, following the Shannon index decrease from 8.06 (0‰ salinity) to 4.34 (rapid salinity increase) and 6.17 (slower salinity increase). As salinity increased, Micropruina, Denitromonas, TM7a, and Marinicella exhibited good salt tolerance. The relative abundance of Denitratisoma, Defluviimonas, Arenimonas, and Denitromonas decreased more significantly following the rapid salinity increase compared with that after the slower salinity increase.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Batch reactors Controlled terms:Activated sludge process - Efficiency - Microorganisms - Nitration - Nitrogen removal Uncontrolled terms:Extracellular polymer substance - High-throughput sequencing - Microbial community structures - Physicochemical characteristics - Polysaccharide contents - Sequence batch reactors - Sequencing batch reactors - Shortcut nitrification Classification code:452.2 Sewage Treatment - 461.9 Biology - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 913.1 Production Engineering Numerical data indexing:Mass_Density 1.11e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.60e-04kg/m3 to 2.20e-02kg/m3, Percentage 7.22e+01%, Percentage 7.50e+01%, Percentage 8.55e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202012110 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405206 Title:CDs-BOC Nanophotocatalyst Activating Persulfate Under Visible Light for the Efficient Degradation of Typical PPCPs Title of translation:CDs-BOC复合催化剂可见光下活化过硫酸盐降解典型PPCPs Authors:Lei, Qian (1); Xu, Lu (1); Ai, Wei (1); Li, Zhi-Min (1); Yang, Lei (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Yang, Lei(yanglei_hj@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2885-2895 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A new type of CDs-BOC photocatalyst was synthesized in a convenient two-step method of hydrothermal and calcination processes. Carbon quantum dots (CDs) were used to modify BiOCl nanosheets. The as-prepared nanocomposite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), UV-vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and photoluminescence spectroscopy (PL), which showed that CDs were successfully introduced. The absorption edge of 7% CDs-BOC nanocomposite was broadened to the visible light region (424 nm), and the charge separation efficiency was remarkably improved. To improve the degradation efficiency of organic pollutants, persulfate (PS) was also introduced into the system. Due to the excellent photocatalytic ability of the nanocatalyst, the photogenerated electrons can effectively activate the PS to produce more reactive oxidizing species (ROS). Under visible light (λ>420 nm) irradiation, 5 mg•L-1 acetaminophen (AAP) can be completely removed within 20 min. Via radical quenching experiments and electron paramagnetic resonance spectroscopy (EPR), the major ROS are determined to be•OH,•SO4-,•O2-, and h+, and the photo-degradation mechanism is proposed. The excellent photocatalytic performance of the CDs-BOC/PS system shows broad practical potential for wastewater treatment.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:High resolution transmission electron microscopy Controlled terms:Bismuth compounds - Carbon Quantum Dots - Chlorine compounds - Degradation - Efficiency - Electron spin resonance spectroscopy - Electrons - Light - Nanocatalysts - Nanocomposites - Organic pollutants - Paramagnetic resonance - Photoluminescence spectroscopy - Scanning electron microscopy - Semiconductor quantum dots - Wastewater treatment - X ray photoelectron spectroscopy Uncontrolled terms:Charge separations - Degradation efficiency - Electron paramagnetic resonance spectroscopy - Oxidizing species - Photocatalytic performance - Photogenerated electrons - UV-Vis diffuse reflectance spectroscopy - Visible light region Classification code:452.4 Industrial Wastes Treatment and Disposal - 701.2 Magnetism: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 801 Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 913.1 Production Engineering - 933 Solid State Physics Numerical data indexing:Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 7.00e+00%, Size 4.24e-07m, Time 1.20e+03s DOI:10.13227/j.hjkx.202011047 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110402877 Title:Relationship Between Relative Crop Yield/Woody Plant Biomass and Ground-level Ozone Pollution in China Title of translation:中国粮食作物产量和木本植物生物量与地表臭氧污染的响应关系 Authors:Feng, Zhao-Zhong (1); Peng, Jin-Long (2, 3) Author affiliation:(1) Key Laboratory of Agrometeorology of Jiangsu Province, School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 101408, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3084-3090 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Currently, ground-level ozone (O3) pollution is increasingly serious in China, and highly threatens plant productivity. In this study, we summarized the relationship between relative crop yield or woody plant biomass and O3 metrics, including M7 (the mean of hourly concentrations from 09:00 to 16:00), SUM06 (sum of hourly concentrations above 60 nmol•mol-1), W126 (Sigmoidal weighted sum of the hourly concentrations during a specified period), PODY [phytotoxic O3 dose above a threshold flux of Y nmol•(m2•s)-1], and the most commonly used AOT40 (accumulated O3 concentrations over an hourly threshold of 40 nmol•mol-1), and proposed their critical level to protect plants against O3 damage. Based on the AOT40 metric, we found that the O3 risk threshold that caused a 5% decrease in yield was 5.93 μmol•mol-1•h for rice, 2.69 μmol•mol-1•h for winter wheat, 8.67 μmol•mol-1•h for maize, and 4.17 μmol•mol-1•h for soybean, indicating that maize may be more tolerant to O3 than the other three crops in China. The O3 risk threshold that led to a 5% reduction in total biomass was 12.20 μmol•mol-1•h across five poplar clones (based on experiment) and 10.87 μmol•mol-1•h across 17 woody plants (based on integrated analysis). On the other hand, some perspectives were presented concerning the establishment of O3 response relationships for important productivity-related parameters, and the improvement of accuracy in O3 regional risk assessment. It is also important to consider how to couple other important factors affecting plant O3 sensitivity (such as soil nitrogen and plant age) into the regional assessment model.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Risk assessment Controlled terms:Air pollution - Biomass - Crops - Forestry - Ozone - Productivity Uncontrolled terms:Assessment models - Critical level - Ground-level ozone - Integrated analysis - Plant productivity - Regional risk assessment - Risk threshold - Total biomass Classification code:451 Air Pollution - 804 Chemical Products Generally - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 5.00e+00% DOI:10.13227/j.hjkx.202009226 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582415 Title:Probabilistic Risk Assessment of Arsenic Exposure Through Drinking Water Intake in Chinese Residents Title of translation:基于概率方法的中国居民饮水途径砷暴露健康风险评估 Authors:Qin, Ning (1, 2); Liu, Yun-Wei (1); Hou, Rong (1); Wang, Cai-Yun (2); Wang, Bei-Bei (1); Duan, Xiao-Li (1) Author affiliation:(1) School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing; 100083, China; (2) Beijing Urban Drainage Monitoring Center Co., Ltd., Beijing; 100012, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3338-3347 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The total arsenic concentrations of the three main drinking water types in China were determined through a systematic literature review. The distribution models of drinking water exposure parameters for different age groups were obtained using the regression method. The carcinogenic and non-carcinogenic risks of different population groups caused by arsenic exposure through different drinking water types were evaluated by a probabilistic risk assessment. The results showed that the geometric mean of total arsenic content in all the drinking water samples in China was (13.0±38.1) μg•L-1. The highest arsenic content was found in the Inner Mongolia Autonomous Region, followed by Guangxi and Shanxi. Based on the relevant standards for drinking water quality, the probability exceeding the threshold value of groundwater and source water is 23.2% and 18.4%, respectively. According to the results of non-carcinogenic risk assessment, the probability of the residents drinking well water and surface water from the water source area exceeding the daily average exposure dose threshold was 24.0% and 19.5%, respectively. According to the carcinogenic risk assessment, the median of carcinogenic risk caused by arsenic in drinking water in China was 3.22×10-5, which is acceptable. The population group of 18-45 years old had the highest risk, and the median LCR was 1.37×10-5. There was still a certain probability that the LCR of drinking well water and surface water would exceed the acceptable risk level recommended by the US EPA. In conclusion, the potential health risks caused by arsenic exposure through drinking water intake exist among Chinese residents. Further control of the arsenic concentration in drinking water is required to reduce the health risk and improve the safety of drinking water. Meanwhile, it is suggested to strengthen the research on risk threshold to provide a scientific basis for the residents' health protection.
© 2021, Science Press. All right reserved. Number of references:73 Main heading:Potable water Controlled terms:Arsenic - Chemicals removal (water treatment) - Environmental Protection Agency - Fading (radio) - Groundwater - Health - Health risks - Inlet flow - Regression analysis - Risk assessment - Surface waters - Water quality Uncontrolled terms:Acceptable risk levels - Arsenic in drinking waters - Carcinogenic risk assessments - Drinking water samples - Inner Mongolia autonomous regions - Probabilistic Risk Assessment - Safety of drinking water - Systematic literature review Classification code:444 Water Resources - 445.2 Water Analysis - 454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 461.7 Health Care - 631.1 Fluid Flow, General - 716.3 Radio Systems and Equipment - 804 Chemical Products Generally - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Age 1.80e+01yr to 4.50e+01yr, Percentage 1.84e+01%, Percentage 1.95e+01%, Percentage 2.32e+01%, Percentage 2.40e+01% DOI:10.13227/j.hjkx.202010116 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779655 Title:Dynamic Material Flow Analysis of Perfluorooctane Sulfonate in China: 1985-2019 Title of translation:1985~2019年中国全氟辛烷磺酰基化合物的动态物质流分析 Authors:Wang, Jia-Yu (1); Chen, Jing-Wen (1); Tang, Wei-Hao (1); Cui, Yun-Han (1); Wang, Zhong-Yu (1); Song, Guo-Bao (1); Chen, Wei-Qiang (2) Author affiliation:(1) Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian; 116024, China; (2) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China Corresponding author:Chen, Jing-Wen(jwchen@dlut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4566-4574 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Perfluorooctane sulfonates (PFOS) are regarded as a category of chemicals with persistence, bioaccumulation, and toxicity. Understanding dynamic flows, stocks, and emissions of PFOS on a macro spatial and temporal scale can help provide a scientific basis for their sound management. In this work, a dynamic material flow analysis (d-MFA) model was built to characterize and analyze the cycles of PFOS in mainland China over the period 1985-2019. Flows, stocks, and environmental emissions were calculated and the sensitivity and uncertainty of the results were then analyzed. Results show that domestic production was the primary source of PFOS in China, most of which was flowed to the domestic market in the form of final products, with the remainder exported to international markets; soil and water were the main sinks of PFOS in China, with emissions from the usage stage contributing the largest portion (103 tons in 2019). The number of inflows and outflows were relatively low before 2000, but gradually increased until 2009 when the relevant convention was issued. Since 2005, in-use stocks and emissions of PFOS have grown yearly. In addition, stocks in landfill have been climbing since 1985. End-of-life management was still dominated by traditional methods, such as landfill and incineration, while there was a trend towards green treatments. This study can provide basic data and theoretical support for the sound management of PFOS in China.
© 2021, Science Press. All right reserved. Number of references:58 Main heading:Uncertainty analysis Controlled terms:Biochemistry - Incineration - International trade - Land fill Uncontrolled terms:Domestic production - Dynamic materials - End of life managements - Environmental emissions - International markets - Perfluorooctane sulfonates - Scientific basis - Sound management Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 801.2 Biochemistry - 922.1 Probability Theory Numerical data indexing:Mass 9.34e+04kg DOI:10.13227/j.hjkx.202101120 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779666 Title:Effects of Dissolved Oxygen on Nutrient Removal Performance and Microbial Community in Low Carbon/Nitrogen Municipal Wastewater Treatment Process Title of translation:溶解氧对低碳源城市污水处理系统脱氮性能与微生物群落的影响 Authors:Chi, Yu-Lei (1); Shi, Xuan (1); Ren, Tong (1); Wang, Xiao-Chang (1); Jin, Peng-Kang (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4374-4382 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the effects of dissolved oxygen (DO) on the treatment of low carbon/nitrogen municipal wastewater, this study examined the characteristics of the microbial community in a low carbon source environment. The treatment process was conducted with the aeration area having DO concentrations of 2-3, 1-2, and lower than 1 mg•L-1. The results demonstrated that reduced DO concentration in the aeration area increased the efficiency of the nitrogen removal process by 20.23% and 80.54%, for external and internal carbon sources, respectively. Similarly, the efficiency of internal carbon source utilization in the phosphorus removal process increased by 13.89%, thus enhancing the nutrient removal efficiency of the low carbon/nitrogen wastewater treatment system. High-throughput sequencing and RDA analysis showed that reduced oxygen concentration motivated an adjustment in microbial community structure, causing functional microorganisms (i.e., Dechloromonas) to become dominant. In addition, the upregulation of genes associated with energy production and conversion, signal transduction, substrate transport, and metabolism provided favourable nutritional conditions for the proliferation of functional microorganisms in low carbon source conditions. This study provides a theoretical basis for improving the growth of microorganisms involved in the nutrient removal process when treating low carbon/nitrogen municipal wastewater.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Dissolved oxygen Controlled terms:Biochemical oxygen demand - Carbon - Microorganisms - Nitrogen removal - Nutrients - Signal transduction - Substrates - Wastewater treatment Uncontrolled terms:High-throughput sequencing - Microbial community structures - Municipal wastewater treatment - Municipal wastewaters - Nitrogen removal process - Nutrient removal efficiency - Nutritional conditions - Wastewater treatment system Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.39e+01%, Percentage 2.02e+01%, Percentage 8.05e+01% DOI:10.13227/j.hjkx.202012261 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804557 Title:Spatial Distribution and Risk Assessment of Heavy Metal Pollution in Farmland Soils Surrounding a Typical Industrial Area of Henan Province Title of translation:河南省典型工业区周边农田土壤重金属分布特征及风险评价 Authors:Meng, Xiao-Fei (1, 2); Guo, Jun-Mei (1, 2); Yang, Jun-Xing (1, 2); Yang, Jun (1, 2); Zheng, Guo-Di (1, 2); Qiao, Peng-Wei (3); Bian, Jian-Lin (4); Chen, Tong-Bin (1, 2) Author affiliation:(1) Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Beijing Key Laboratory of Remediation of industrial Pollution Sites, Environmental Protection Research Institute of Light Industry, Beijing; 100089, China; (4) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China Corresponding author:Yang, Jun-Xing(yangajx@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:900-908 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to fully explore the spatial distribution of soil heavy metal contaminants in farmland soil surrounding a typical industrial area in Dakuai town, Xinxiang city, Henan Province, the concentrations of As, Cd, Cr, Cu, Ni, Pb, and Zn in the surface soil and within the soil profile were determined and assessed. The principal components were also analyzed for source apportionment to provide a theoretical basis for the control and prevention of heavy metal pollution. According to the results, the soils in the study area are severely contaminated by Cd and Cu and moderated contaminated by As due to the battery manufacture and Cu (e.g., pipe and wire) processing. The concentrations of Cd, Cu, and As in soils were (2.56±1.23) mg•kg-1, (205.58±157.49) mg•kg-1, and (15.27±4.14) mg•kg-1, respectively, which exceeds standards by 100%, 89.44%, and 3.40%, respectively. Accounting for the influence of pollution sources, terrain, runoff erosion, and prevailing wind direction, all heavy metal concentrations were higher in the south direction, lower in the north direction. The concentrations of Cd and Cu in soil profile samples decreased with depth, with highest concentrations at the surface, indicating the strong effect of industrial activities. Arsenic concentrations varied little with soil depth due to its strong migration ability in alkaline soil, again suggesting an industrial source. Among them, the soil of study area was severely contaminated by Cd and Cu (Level 5). Cd poses a severe potential ecological risk (Level 5) and Cu poses a medium risk (Level 2) in the study soils, while other heavy metals show low potential ecological risk (Level 1). The order of the risk identified was Cd>Cu>Ni>As>Pb>Cr>Zn. In addition, the combined potential ecological risk of heavy metals in the target area is severe. The principal component analysis showed that the high As, Cd, and Cu contents are mainly derived from industrial areas. Therefore, it is urgent to remediate Cd and Cu soil contamination in this area and implement precautions to limit As contamination.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Soil pollution Controlled terms:Contamination - Farms - Heavy metals - Pollution control - Processing - Risk assessment - Soil surveys - Soils - Spatial distribution Uncontrolled terms:Arsenic concentration - Control and prevention - Heavy metal concentration - Heavy metal pollution - Industrial activities - Potential ecological risk - Prevailing wind directions - Source apportionment Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.4 Manufacturing - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 1.00e+02%, Percentage 3.40e+00%, Percentage 8.94e+01% DOI:10.13227/j.hjkx.202005321 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404694 Title:Changes and Potential Sources of Atmospheric Black Carbon Concentration in Shanghai over the Past 40 Years Based on MERRA-2 Reanalysis Data Title of translation:基于MERRA-2再分析资料的上海市近40年大气黑碳浓度变化及潜在来源解析 Authors:Cao, Shan-Shan (1); Duan, Yu-Sen (2); Gao, Chan-Chan (1); Su, Ling (1); Yang, Yi-Xuan (1); Zhang, Yang (1); Cai, Chao-Lin (1); Liu, Min (1, 3) Author affiliation:(1) Shanghai Key Laboratory for Urban Ecological Processes and Eco-restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai; 200241, China; (2) Shanghai Environmental Monitoring Center, Shanghai; 200235, China; (3) Institute of Eco-Chongming, Shanghai; 200241, China Corresponding author:Liu, Min(mliu@re.ecnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2668-2678 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As an important component of atmospheric aerosols, black carbon (BC) has a great influence on the regional and global radiation balance, climate, and human health due to its small particle size, large specific surface area, and radiative forcing potential. Here, the spatio-temporal characteristics of atmospheric BC were investigated based on modern-era retrospective analysis for research and applications version 2 (MERRA-2) reanalysis data and ground observation data during 1980-2019 in Shanghai, a highly urbanized city in mainland China. The influences of local emissions and regional transmission on regional-scale BC concentrations were examined using the M-K trend test, backward trajectory analysis, and the potential source contribution function (PSCF). The results showed that: ① MERRA-2 BC and ground observation datasets showed good consistency (R∈[0.68, 0.72]), indicating that MERRA-2 reanalysis data can be used to reveal long-term changes in ground-level atmospheric BC concentrations; ② Atmospheric BC concentrations in Shanghai over the past 40 years can be divided into three stages: a "low value" stage of slow growth [1980-1986, (1.75±0.17) μg•m-3], a relatively stable "median value" stage [1987-1999, (2.18 ±0.07) μg•m-3], and a fluctuating "high value" stage [2000-2019, (3.07±0.31) μg•m-3]. Seasonally, Shanghai's BC concentrations generally show a "U" pattern with low concentrations in summer and high concentrations in winter. As a result of black carbon emissions from marine diesel engines and other engines used for water transportation, a small peak also occurs in July; ③ The diagnostic quality ratio of air pollutants and the bivariate correlation analysis [R(BC-NO2)>R(BC-CO)>R(BC-SO2)] indicated that traffic emissions were the main sources of atmospheric BC in Shanghai, especially by heavy diesel vehicles; ④ The backward trajectory and PSCF analyses found that the air mass of Shanghai in summer was dominated by a clean sea breeze, accounting for 77.18%. In contrast, during the other seasons, more than 50% of the air mass came from the north. The potential source regions of atmospheric BC in Shanghai are mainly distributed in eastern China, expanding outwards and centering on the Yangtze River Delta, and the expansion direction is consistent with the directions of the backward trajectories.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Atmospheric aerosols Controlled terms:Atmospheric radiation - Carbon - Diesel engines - Marine pollution - Mass transportation - Particle size - Particle size analysis - Particulate emissions - Quality control - Sulfur dioxide - Trajectories Uncontrolled terms:Backward trajectory analysis - Bivariate correlations - Large specific surface areas - Potential source contribution function - Potential source regions - Research and application - Retrospective analysis - Spatiotemporal characteristics Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 453 Water Pollution - 612.2 Diesel Engines - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control - 951 Materials Science Numerical data indexing:Age 4.00e+01yr, Percentage 5.00e+01%, Percentage 7.72e+01% DOI:10.13227/j.hjkx.202009217 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405053 Title:Comparison of Available Nitrogen and Phosphorus Characteristics in the Land-Water Transition Zone of Different Watersheds and Their Environmental Significance Title of translation:不同流域水陆过渡带氮磷有效态的特征对比及环境意义 Authors:Zhu, Hai (1); Yuan, Xu-Yin (1); Ye, Hong-Meng (2); Cheng, Jin (1); Mao, Zhi-Qiang (1); Han, Nian (1); Zhou, Hui-Hua (1) Author affiliation:(1) College of Environment, Hohai University, Nanjing; 210098, China; (2) College of Ecology and Resource Engineering, Wuyi University, Wuyishan; 354300, China Corresponding author:Yuan, Xu-Yin(yxy_hjy@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2787-2795 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to explore the characteristics and environmental significance of available nitrogen and phosphorus in different land-water transition zones, soil and sediment samples from three study areas, including the upstream watershed of Minjiang River (MJU), western watershed of Hongze Lake (HZW), and western watershed of Taihu Lake (THW), were collected and analyzed. The results showed that the contents of total nitrogen and phosphorus in THW were higher than those of other two study areas. The contents of nitrogen and phosphorus in sediments were higher than those in soils of HZW. The distribution trend of available nitrogen and available phosphorus was generally consistent with the distribution trend of total nitrogen and phosphorus. The proportions of available nitrogen and phosphorus in THW and HZW were much higher than those in MJU, and the proportions of available nitrogen and phosphorus in sediments were higher than those in soils. The physiochemical properties such as pH value, organic matter, and iron and aluminum oxides were related to the available nitrogen and phosphorus in the soil and sediment, but correlations between them were complex. The distribution patterns of available nitrogen and phosphorus in the soil and sediments of the land-water transition zone reflect the impacts of the natural environment and human activities, particularly those of the latter.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Sediments Controlled terms:Aluminum oxide - Iron oxides - Lakes - Nitrogen - Phosphorus - Soils - Watersheds Uncontrolled terms:Available nitrogen - Available phosphorus - Distribution patterns - Environmental significance - Natural environments - Nitrogen and phosphorus - Physio-chemical properties - Soil and sediment Classification code:444.1 Surface Water - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202009183 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779907 Title:Effects of Microplastics Addition on Soil Organic Carbon Mineralization in Citrus Orchard Title of translation:微塑料添加对橘园土壤有机碳矿化的影响 Authors:Zhang, Xiu-Ling (1); Z.-W., Yan; F., Wang; X., Wang; H., Xu; R.-G., Hu; C., Yan; S., Lin Author affiliation:(1) Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, College of Recourses and Environment, Huazhong Agricultural University, Wuhan; 430070, China; (2) Hubei Provincial Academy of Eco-environmental Sciences, Wuhan; 430072, China; (3) Hubei Agricultural Ecological Environment Protection Station, Wuhan; 430070, China Corresponding author:Lin, Shan(linshan@mail.hzau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4558-4565 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the effects of microplastics on soil organic carbon mineralization and the changes in soil enzyme activities, an incubation experiment was conducted whereby single applications of either microplastics or straw, and combined application of both, were added to Dangyang citrus orchard soil. The results showed that the combined application of straw and microplastics significantly affected organic carbon mineralization in the soil, but the single addition of microplastics had no significant effect. Compared with straw alone, the application of a small combined amount of microplastics and straw significantly increased soil organic carbon mineralization by 8.20%, while medium and high amounts of the combined application significantly inhibited soil organic carbon mineralization. The lowest amount of organic carbon mineralization occurred with the highest amount of combined microplastics and straw, 10.13% lower than with straw alone. The addition of microplastics significantly reduced the activity of β-glucosidase. In particular, a high amount of microplastics significantly decreased the activity of β-glucosidase, compared with the control, by 20.52%, 43.93%, and 17.79% on the day 1, 6, and 35, respectively. However, straw application alleviated the inhibition effect of microplastic application on soil β-glucosidase activity. The soil organic carbon mineralization rate was significantly positively correlated with DOC, MBC and β-glucosidase activity.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Mineralogy Controlled terms:Microplastic - Orchards - Organic carbon - Soils Uncontrolled terms:Beta glucosidase - Carbon mineralization - Citrus orchards - Inhibition effect - Microplastics - Soil enzyme activity - Soil organic carbon Classification code:482 Mineralogy - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 821.3 Agricultural Methods Numerical data indexing:Percentage 1.01e+01%, Percentage 1.78e+01%, Percentage 2.05e+01%, Percentage 4.39e+01%, Percentage 8.20e+00% DOI:10.13227/j.hjkx.202102042 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404549 Title:Sensitivity Analysis of Boundary Load Reduction in a Large Shallow Lake Water Quality Model Title of translation:大型浅水湖泊水质模型边界负荷敏感性分析 Authors:Wang, Ya-Ning (1, 2); Li, Yi-Ping (1, 2); Cheng, Yue (1, 2); Tang, Chun-Yan (1, 2); Chen, Gang (3) Author affiliation:(1) College of Environment, Hohai University, Nanjing; 210098, China; (2) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China; (3) State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing; 210098, China Corresponding author:Li, Yi-Ping(liyiping@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2778-2786 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the spatial and temporal response of water quality to external load reduction in Lake Taihu, Jiangsu Province, China, and clarify the exogenous load reduction under different water inflow and pollution conditions, a water quality model was constructed and the inflow boundaries were divided into seven groups based on the EFDC model. Taking COD and ammonia nitrogen as output targets, the sensitivities of Taihu Lake water quality boundaries were analyzed using a local sensitivity analysis. The results showed that COD and ammonia nitrogen concentrations of each lake area were more sensitive to the boundary load of the lake area than the rest of the lake area, and the sensitivity index was the highest in the Northwest Lake area. Furthermore, the improvement rates of mean COD concentrations in the whole lake decreased by 28.40%-34.71% in the dry season relative to the wet season, and the ranked sensitivity order of the boundaries was as follows: Northwest Lake boundary>Zhushan Lake boundary>Gonghu Lake boundary>Meiliang Bay boundary>Southwest Lake area boundary>Eastern Lake area boundary>East Lake Taihu boundary. The average improvement rates of ammonia nitrogen concentrations in the whole lake were 41.59%-42.34% higher in the dry season relative to the wet season, and the ranked boundary sensitivity order was as follows: Northwest Lake boundary>Meiliang Bay boundary>Zhushan Lake boundary>Gonghu Lake boundary>Southwest Lake boundary>East Lake Taihu boundary>Eastern Lake area boundary. This difference was affected by algal growth and metabolism, and artificial water diversion and drainage. Therefore, it is necessary to consider the reduction period and inflow location according to different water-quality indicators when planning external prevention and control measures in large lakes.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Lakes Controlled terms:Ammonia - Drought - Flood control - Nitrogen - Pollution control - Quality control - Sensitivity analysis - Water pollution - Water quality Uncontrolled terms:Ammonia nitrogen - Jiangsu province - Local sensitivity analysis - Prevention and controls - Sensitivity indices - Temporal response - Water quality indicators - Water quality modeling Classification code:442.1 Flood Control - 444 Water Resources - 445.2 Water Analysis - 453 Water Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control - 921 Mathematics Numerical data indexing:Percentage 2.84e+01% to 3.47e+01%, Percentage 4.16e+01% to 4.23e+01% DOI:10.13227/j.hjkx.202010049 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582260 Title:Effect of Ozone Dosage on Sludge Settleability and Biological Nutrient Removal in SBR System Title of translation:臭氧投量对SBR系统污泥沉降性能及脱氮除磷的影响 Authors:Lü, Yong-Tao (1, 2, 3); C.-S., Zhu; X.-Y., Zhang; C., Xu; Y.-B., Pan; S., Liu; S.-K., Cui; L., Wang Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Key Laboratory of Environmental Engineering, Xi'an; 710055, China; (3) Key Laboratory of Membrane Seperation of Shaanxi Province, Research Institute of Membrane Seperation Technology of Shaanxi Province, Xi'an; 710055, China; (4) Shaanxi Modern Architecture Design & Research Institute, Xi'an; 710024, China Corresponding author:Wang, Lei(wl0178@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3400-3404 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The effect of ozone dosage on sludge settleability and biological nutrient removal performance in a sequencing batch reactor was investigated by inoculating the bulking sludge with the SVI of 280 mL•g-1 from a wastewater treatment plant in winter. The filamentous mycelium was interrupted, and the SVI was decreased to 125 mL•g-1 after ozone dosage with a low concentration of 0.085 g•g-1(O3/MLSS) for 20 days, which indicated the disappearance of the sludge bulking. The performance of nitrification and phosphorus removal efficiency was not affected obviously. However, the sludge settleability deteriorated with a high dosage of ozone, and the phosphorus removal efficiency was decreased to around 60%. Further study showed that PS/PN had a positive correlation with SVI with the correlation coefficient of 0.938 1, which can be used to characterize sludge settleability. A low ozone dosage not only interrupted the filamentous mycelium, but it also affected the content and composition of the EPS, which led to improved settleability.
© 2021, Science Press. All right reserved. Number of references:25 Main heading:Ozone Controlled terms:Batch reactors - Biological water treatment - Efficiency - Fungi - Nutrients - Phosphorus - Sewage sludge - Sewage treatment plants - Wastewater treatment Uncontrolled terms:Biological nutrient removal - Correlation coefficient - Filamentous mycelia - Low concentrations - Positive correlations - Sequencing batch reactors - Sludge settleability - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 802.1 Chemical Plants and Equipment - 804 Chemical Products Generally - 913.1 Production Engineering Numerical data indexing:Age 5.48e-02yr, Percentage 6.00e+01%, Specific_Volume 1.25e-01m3/kg to 2.20e-02m3/kg, Specific_Volume 2.80e-01m3/kg to 2.20e-02m3/kg DOI:10.13227/j.hjkx.202012051 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688829 Title:Characteristics of Ozone and Source Apportionment of the Precursor VOCs in Tianjin Suburbs in Summer Title of translation:天津市郊夏季的臭氧变化特征及其前体物 VOCs的来源解析 Authors:Luo, Rui-Xue (1); Liu, Bao-Shuang (1); Liang, Dan-Ni (1); Bi, Xiao-Hui (1); Zhang, Yu-Fen (1); Feng, Yin-Chang (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China Corresponding author:Liu, Bao-Shuang(lbsnankai@foxmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:75-87 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:From June to August 2018, a 1-hr resolution concentration dataset of ozone and its gaseous precursors (volatile organic compounds(VOCs) and NOx), and meteorological parameters were synchronously monitored by online instruments of the Nankai University Air Quality Research Supersite. The relationships and variation characteristics between ozone and its precursors were analyzed. According to the photochemical age, the initial concentrations of VOCs were calculated, and the photochemical loss of the concentration of VOCs during the daytime (06:00-24:00) was corrected. The initial and directly monitored concentrations of VOCs were incorporated into the PMF model for source apportionment. The results indicated that the mean concentration of O3 in Tianjin in summer was (41.3±25.7)×10-9, while that of VOCs was (13.9±12.3)×10-9. The average concentration of alkane (7.0±6.8)×10-9was clearly higher than that of other VOC species. The species with high concentrations of alkanes were propane and ethane, accounting for 47% of the total alkane concentration. The average ozone formation potential (OFP) in summer was 52.1×10-9, and the OFP value of alkene was the highest and its contribution reached 57%. During the daytime, alkene loss accounted for 75% of the total VOC loss. The major sources of VOCs that were calculated based on the initial concentration data were the chemical industry and solvent usage (25%), automobile exhaust (22%), combustion source (19%), LPG/NG (19%), and gasoline volatilization (15%), respectively. Compared with the apportionment results based on directly monitored concentrations, the contribution of the chemical industry and solvent usage decreased by 4%, while automobile exhaust decreased by 5%. By combining the results of PMF apportionment and the OFP model to analyze the relative contributions of emission sources to ozone formation, and we found that the highest contribution source of ozone was the chemical industry and solvent usage (26%) in summer. Compared with the analysis results based on the directly monitored concentrations, the OFP values of the chemical industry and solvent usage decreased by 7%, while that of NG/LPG apparently decreased by 13%.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Ozone Controlled terms:Air quality - Chemical analysis - Chemical industry - Fiber optic sensors - Liquefied petroleum gas - Olefins - Paraffins - Solvents - Volatile organic compounds Uncontrolled terms:Average concentration - Initial concentration - Meteorological parameters - Ozone and its precursors - Ozone formation potentials - Relative contribution - Source apportionment - Variation characteristics Classification code:451.2 Air Pollution Control - 523 Liquid Fuels - 741.1.2 Fiber Optics - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 805 Chemical Engineering, General Numerical data indexing:Percentage 1.30e+01%, Percentage 1.50e+01%, Percentage 1.90e+01%, Percentage 2.20e+01%, Percentage 2.50e+01%, Percentage 2.60e+01%, Percentage 4.00e+00%, Percentage 4.70e+01%, Percentage 5.00e+00%, Percentage 5.70e+01%, Percentage 7.00e+00%, Percentage 7.50e+01%, Time 3.60e+03s DOI:10.13227/j.hjkx.202005096 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804522 Title:Effects of Copper Pollution on Microbial Communities in Wheat Root Systems Title of translation:铜胁迫对小麦根系微域微生物群落的影响 Authors:Ge, Yi (1); Xu, Min-Min (2); Xu, Shao-Hui (1); Xu, Yan (1) Author affiliation:(1) School of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China; (2) Shandong Academy of Environmental Sciences Company Limited, Ji'nan; 250100, China Corresponding author:Xu, Yan(yanxu@qdu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:996-1003 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Wheat is the main food crop in China while at the same time, heavy metals pose a significant threat to crop growth and food security. Many studies indicate that rhizospheric microorganism play an important role in regulating crop development and stress resistance. In this study, the variation in wheat root-associated microbial communities under copper pollution was studied using high-throughput sequencing. The microbial community structure and diversity among different wheat rhizocompartments were compared after sequencing of microbial communities in the bulk soil, rhizosphere, and endosphere of wheat under copper pollution in combination with pot-based experiments. The results showed that the microbial diversity of the endosphere was significantly lower than in the rhizosphere and bulk soil(P<0.001), indicating that root surfaces serve as a gateway for microorganisms to enter into the interior root environment, and play a role in filtering root colonization. Copper pollution significantly reduced the microbial diversity of the rhizosphere (P<0.05). In the bulk soil and endosphere environments, although copper pollution reduced microbial diversity in the corresponding rhizocompartment, the difference was not significant (P>0.05). Proteobacteria and Actinobacteria were the dominant bacteria groups in the rhizosphere and the bulk soil under copper pollution. In addition, microbes such as Bacillus, Pseudoxanthomonas, and Sphingomonas show strong stress resistance and can provide nutrients for plants.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Pollution control Controlled terms:Bacteria - Bacteriology - Chemical contamination - Copper - Crops - Food supply - Heavy metals - Soils Uncontrolled terms:Actinobacteria - Crop development - High-throughput sequencing - Microbial communities - Microbial community structures - Microbial diversity - Root colonization - Stress resistance Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 544.1 Copper - 821.4 Agricultural Products - 822.3 Food Products DOI:10.13227/j.hjkx.202005252 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247590 Title:Effects of Water Management on Cadmium Accumulation by Rice (Oryza sativa L.) Growing in Typical Paddy Soil Title of translation:典型污染稻田水分管理对水稻镉累积的影响 Authors:Zhang, Yu-Ting (1, 2); Tian, Ying-Bing (1); Huang, Dao-You (2); Zhang, Quan (2); Xu, Chao (2); Zhu, Han-Hua (2); Zhu, Qi-Hong (2) Author affiliation:(1) College of Agronomy, Yangtze University, Jingzhou; 434025, China; (2) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China Corresponding author:Zhang, Quan(quanzhang@isa.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2512-2521 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to explore the effects of water management on the Cd accumulation of rice in paddy soils with different parent materials, a pot experiment with three paddy soils with different parent materials from Hunan Province (granite sandy soil, plate shale soil, and purple sandy shale soil) with different water management treatments [flooding and alternate wetting and drying (AWD)] was performed. The soil pH, DTPA-Cd, Fe plaque in the rice roots, and heavy metal concentration in the rice were determined. The results showed that the soil pH of the three paddy soils under the flooding treatment was increased by 0.17-1.33 units. During the filling and maturity periods, compared with that under AWD, the DTPA-Cd concentration in the three paddy soils was reduced by 14.39%-36.56% under the flooding treatment, but the DTPA-Fe concentration was increased by 35.35%-347.25%. In the three growth stages, the Cd and Mn concentrations in the Fe plaque (except for DCB-Fe) were in the order of tillering stage<filling stage<mature stage. Compared with that under AWD, the brown rice Cd concentration in the three soils was reduced by 57.84%-93.79% under flooding treatment. The Cd accumulation in rice was reduced under flooding treatment by reducing the DTPA-Cd via increasing the soil pH and DTPA-Fe and by decreasing the formation of Fe plaque. According to the results of the correlation and SEM analysis, the soil pH and DCB-Cd were the main factors affecting the Cd accumulation in rice grains, although the changes in the DTPA-Cd and DTPA-Fe also impacted the Cd in rice grains. In summary, our study demonstrated that water management had a significant impact on the Cd content in rice, and there were significant differences among the three paddy soils with different parent materials. In conclusion, the Cd content in rice grains was affected by the soil parent material, soil physicochemical properties, and Fe plaque on the surface of the rice roots. The granite sandy soil and plate shale soil with different water management treatments had significant impacts on the contents of heavy metals in rice. Continuous flooding is a valuable strategy for improving soil acidity and alkalinity and minimizing soil available Cd, but the soil parent materials must be considered.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Soil pollution Controlled terms:Alkalinity - Cadmium metallography - Floods - Grain (agricultural product) - Granite - Heavy metals - Iron metallography - Physicochemical properties - Sand - Shale - Soils - Water management Uncontrolled terms:Cd accumulation - Cd concentrations - Heavy metal concentration - Mn concentrations - Parent materials - Rice (Oryza sativa L.) - Soil physico-chemical properties - WETTING AND DRYING Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 531.2 Metallography - 801.1 Chemistry, General - 821.4 Agricultural Products Numerical data indexing:Percentage 1.44e+01% to 3.66e+01%, Percentage 3.54e+01% to 3.47e+02%, Percentage 5.78e+01% to 9.38e+01% DOI:10.13227/j.hjkx.202008305 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404209 Title:Aqueous-phase Oxidation of Dissolved Organic Matter (DOM) from Extracts of Ambient Aerosols Title of translation:气溶胶中溶解性有机质(DOM) 液相氧化 Authors:Tao, Ye (1); Chen, Yan-Tong (1); Li, Nan-Wang (1); Zhang, Xin-Yu (1); Ye, Zhao-Lian (1); Ge, Xin-Lei (2) Author affiliation:(1) School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou; 213001, China; (2) School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing; 210044, China Corresponding authors:Ye, Zhao-Lian(bess_ye@jsut.edu.cn); Ge, Xin-Lei(caxinra@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2659-2667 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Recently, a large number of laboratory studies have focused on the aqueous-phase photochemistry of single organic compound in atmospheric condensed phases, yet few studies have been conducted on the aqueous-phase photochemical oxidation of real-world complex dissolved organic matter (DOM). Therefore, in this work, we report experimental results for the photochemical oxidation of DOM extracts from ambient fine aerosol samples upon direct photolysis or against OH oxidation, under both simulated sunlight and ultraviolet irradiation conditions. The products at different stages of photolysis were analyzed via UV-vis and spectroscopy and soot-particle aerosol mass spectrometry (SP-AMS) to investigate their optical and chemical characteristics. The results demonstrate the effective degradation of DOM under UV irradiation, and the f44 values of the corresponding products aremuch lower than under sunlight irradiation. A variety of carboxylic acids were generated during liquid-phase photolysis, and oxalic acid was found to be the most abundant. The light absorbance and concentration of HULIS did not change significantly under sunlight illumination; however, under UV and UV+•OH conditions, the concentration of HULIS increased continuously with reaction time. The HULIS concentration at 23 h was approximately four times the initial value, indicating the formation of brown carbon species with carboxyl, hydroxyl, and aromatic and other functional groups. Our results show that the increase in light absorptivity and formation rate of brown carbon from DOM are limited when aqueous-phase oxidation occurs under sunlight illumination. In comparison, DOM can constantly decompose into HULIS or small molecules under ultraviolet light illumination, and the light absorptivity of the remaining organic matter may be relatively high, resulting in final products with a high unit mass absorption efficiency (MAE). We have investigated the aqueous-phase oxidation of actual filter extracts for the first time, and our results provide valuable insights to the formation of air pollution complexes.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Uranium metallography Controlled terms:Aerosols - Biogeochemistry - Carbon - Chemical analysis - Irradiation - Mass spectrometry - Organic compounds - Oxalic acid - Oxidation - Photodegradation - Photolysis - Vanadium metallography Uncontrolled terms:Aerosol mass spectrometry - Aqueous phase oxidations - Chemical characteristic - Dissolved organic matters - Photochemical oxidation - Sunlight irradiation - Ultra-violet light - Ultraviolet irradiations Classification code:531.2 Metallography - 547 Minor, Precious and Rare Earth Metals and Alloys - 801 Chemistry - 801.2 Biochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Time 8.28e+04s DOI:10.13227/j.hjkx.202009162 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804514 Title:Effect of Water Management on Rice Growth and Rhizosphere Priming Effect in Paddy Soils Title of translation:水分管理对水稻生长与根际激发效应的影响特征 Authors:Lin, Sen (1, 2); Xiao, Mou-Liang (2); Jiang, Jia-Bin (3); Wei, Liang (2); Li, Ke-Lin (1); Liu, Shou-Long (2); Zhu, Zhen-Ke (2); Ge, Ti-Da (2); Wu, Jin-Shui (2) Author affiliation:(1) School of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China; (2) Key Laboratory of Subtropical Agro-Ecological Processes, Institute of Subtropical Agro-Ecology, Chinese Academy of Sciences, Changsha; 410125, China; (3) College of Agriculture, Guizhou University, Guiyang; 550025, China Corresponding authors:Li, Ke-Lin(csfuklli@163.com); Zhu, Zhen-Ke(zhuzhenke@isa.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:988-995 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The rhizosphere priming effect (RPE) caused by carbon inputs from crop rhizodeposits plays a key role in regulating the carbon emission flux and carbon balance of farmland soils. Due to frequent alternations between dry and wet conditions, CO2 and CH4 emissions and the RPE in paddy field ecosystems are significantly different to those of other ecosystems. Therefore, it is of great significance to determine the direction and intensity of the rice RPE under alternations of dry and wet to limit greenhouse gas emissions. In this study, using a 13C-CO2 continuous labeling method combined with a pot-based experiment, the response of rice growth and the RPE under alternating dry and wet and continuous flooding conditions was examined. The results showed that, compared with the continuous flooding treatment, the alternating dry and wet treatments significantly increased aboveground and root biomass and the root-to-root ratio, and also increased soil microbial biomass. Under continuous flooding conditions, fluxes of 13CO2 and 13CH4 increased with rice growth from 10.2 μg•(kg•h)-1 and 2.8 μg•(kg•h)-1 (63 d) to 16.0 μg•(kg•h)-1 and 3.2 μg•(kg•h)-1 (75 d), respectively. During the 12-day drying process, the emissions of 13CO2 and 13CH4 derived from rhizosphere deposited C decreased by 57.5% and 88.1%. Under continuous flooding conditions, the RPE for CO2 and CH4 were positive and increased with the growth of rice. Under the alternating dry and wet treatment, after 12 days of drying, the RPE for CO2 and CH4 was reduced from 0.29 mg•(kg•h)-1 and 12.3 μg•(kg•h)-1 (63 d) to -0.39 mg•(kg•h)-1 and 0.07 μg•(kg•h)-1 (75 d). Thus, alternating wet and dry treatment can effectively promote rice growth and reduce the cumulative emissions of CH4. Therefore, adopting appropriate field water management is of great significance for increasing rice yields and mitigating greenhouse gas emissions.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Gas emissions Controlled terms:Carbon - Carbon dioxide - Ecosystems - Floods - Greenhouse gases - Soils - Water management Uncontrolled terms:Alternating wet and dries - Carbon emissions - Cumulative emissions - Dry and wet conditions - Drying process - Labeling methods - Priming effects - Soil microbial biomass Classification code:451.1 Air Pollution Sources - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Age 3.29e-02yr, Percentage 5.75e+01%, Percentage 8.81e+01% DOI:10.13227/j.hjkx.202007177 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688813 Title:Changes in Algal Particles and Their Water Quality Effects in the Outflow River of Taihu Lake Title of translation:太湖出流河道藻颗粒变化及其水质效应 Authors:Guo, Yu-Long (1, 2); Xu, Hai (2); Chen, Xu-Qing (3); Zheng, Jian-Zhong (4); Zhan, Xu (1); Zhu, Guang-Wei (2); Zhu, Meng-Yuan (2) Author affiliation:(1) School of Environment and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Wuxi Blue Algae Control Office, Wuxi; 214000, China; (4) Wuxi Branch of Jiangsu Bureau of Hydrology and Water Resources, Wuxi; 214000, China Corresponding author:Zhan, Xu(xuzhan@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:242-250 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Connected rivers are a common engineering method to ensure the ecological health of urban water. However, for the lakes with serious cyanobacteria blooms, the algal particles are carried by the outflow of the lake and will have a significant impact on water quality. The location at which the Liangxi river meets Meiliang Bay of Lake Taihu was selected to explore the influence of the eutrophic lake on the connected rivers, and high-frequency monitoring was conducted in summer for three consecutive years to analyze the changes in the flux of cyanobacterial bloom particles in rivers and their impact on river water quality. The results show that: ① The improvement of the algal cyanobacteria bloom in Meiliang Bay and the operation of the pressure-controlled algae well at the entrance of the river significantly reduced the concentration of chlorophyll a and the flux of algae particles in the Liangxi River. The average value of the concentration of chlorophyll a and the flux of algae particles in the river in summer 2019 were 54.34 μg•L-1 and 84.7 t•d-1, respectively, and significantly lower than those of 2017; ②Water diversion had a significant effect on improving the water quality of the receiving water. Except for DTP, the nitrogen and phosphorus concentrations of the remaining forms of the Liangxi River showed a downward trend from 2017 to 2019, indicating that the water quality of the Liangxi river improved after water transfer; ③ A large amount of cyanobacterial blooms entering the channel significantly increased the particulate nitrogen and phosphorus content of the water. From 2017 to 2019, the nitrogen and phosphorus in the Liangxi River were mainly PN and PP, accounting for 62.5% and 70.8% of TN and TP, respectively; ④ The water quality of the Beijing-Hangzhou Grand Canal and other connected rivers has not been affected by the algal particles in Meiliang Bay. In August 2019, the chlorophyll a content in the canal water decreased by 65% compared with that of June, indicating that cyanobacterial bloom particles have not accumulated in the Grand Canal; ⑤ On the premise that the cyanobacteria bloom in the lake has not been effectively improved, the algae particles carried by the water diversion will have an impact on the water quality and landscape of the local reach connecting the river.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:River diversion Controlled terms:Algae - Chlorophyll - Flood control - Lakes - Nitrogen - Phosphorus - Water quality Uncontrolled terms:Beijing-Hangzhou grand canals - Cyanobacteria blooms - Cyanobacterial blooms - Ecological health - Engineering methods - High-frequency monitoring - Nitrogen and phosphorus - River water quality Classification code:441 Dams and Reservoirs; Hydro Development - 442.1 Flood Control - 445.2 Water Analysis - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass_Density 5.43e-05kg/m3 to 2.20e-02kg/m3, Mass_Flow_Rate 8.89e-01kg/s, Percentage 6.25e+01%, Percentage 6.50e+01%, Percentage 7.08e+01% DOI:10.13227/j.hjkx.202005241 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688801 Title:Effects of Nano Material on Cadmium Accumulation Capacity and Grain Yield of Indica Hybrid Rice Under Wetting-drying Alternation Irrigation Title of translation:干湿交替灌溉制度下纳米修复材料对杂交籼稻籽粒Cd累积及产量的影响 Authors:Yang, Ru (1); Chen, Xin-Rui (1); Zhang, Ying (1); Cui, Jun-Yi (2); Wu, Li-Quan (1, 3); Ma, You-Hua (2); Liao, Jiang (4); He, Hai-Bing (1) Author affiliation:(1) College of Agriculture, Anhui Agricultural University, Hefei; 230036, China; (2) School of Resources and Environment, Anhui Agricultural University, Hefei; 230036, China; (3) Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing; 210095, China; (4) Agricultural and Rural Committee of Wulong, Chongqing; 408500, China Corresponding author:He, Hai-Bing(hhb_agr@ahau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:368-377 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Wetting-drying alternation irrigation (WDI) can harvest high grain yield under effective irrigation water saving conditions. However, the kernel cadmium (Cd) content usually exceeds the national standard of 0.20 mg Cd per kg kernel in WDI. Applying a passivating agent with high-efficient repairing capabilities could be a feasible approach to reduce Cd content lower than 0.20 mg•kg-1 in WDI. Therefore, a field experiment was conducted with different irrigation regimes and passivating agents in a mildly Cd-polluted paddy field, of which the irrigation regimes were WDI and traditional flooded irrigation (FI) and the six passivating agents treatments were CK (no passivating agent; T1), slaked lime with 1 125 kg•hm-2(T2), 1 125 kg slaked lime and 3 000 kg biochar per hectare (T3), 1 125 kg slaked lime and 3 000 kg organic fertilizer per hectare (T4), 1 500 kg porous Nano stupalith per hectare (T5), and 1 125 kg slaked lime combined with 1 500 kg porous Nano stupalith per hectare (T6). Two typical Indica hybrid rice varieties with a high accumulated capacity named cultivar Shenliangyou 1813 and a low accumulated trait named cultivar Liangyou 6206 were utilized. The main reason that Indica hybrid rice cultivars were selected was their higher absorbed and accumulated characteristics than that of Japonica rice. The results indicated that available Cd content of the soil significantly declined with 17.13%-61.01% decreasing amplitude at maturity when compared with pre-transplanting in WDI; however, the reduction was in the range of -43.45%-21.07% for the FI treatment across cultivars and passivating agents treatments. The available Cd content at maturity was significantly greater in FI than in WDI (P<0.05). In contrast, WDI had higher Cd content on stem, leaf, and kernel organs at maturity than with FI treatment of both cultivars and all of the passivating agents (P<0.05). Generally, the T1 treatment had the maximum available Cd content in the soil layer and highest accumulated Cd content on different aboveground organs, followed by the T2, T3, T4, T5, and T6 treatments considering both cultivars and irrigation regimes. The Cd kernel contents were 0.23-0.24 mg•kg-1 and 0.16-0.21 mg•kg-1 for cultivars Shenliangyou 1813 and Liangyou 6206, respectively, in the T6 treatment. The higher Cd kernel content was generally related to a larger Cd content in the stem organ. For the grain yield, no significant differences were observed among cultivars, irrigation regimes, or passivating agents treatments (P>0.05). Under WDI, the kernel Cd content was still slightly higher than 0.20 mg•kg-1 in the T6 treatment (0.24 mg•kg-1 for cultivar Shenliangyou 1813 and 0.21 mg•kg-1 for cultivar Liangyou 6206); however, there is a predictability potential to produce lower than 0.20 mg•kg-1 kernel content in the T6 treatment if a cultivar with low accumulated capacity is used. Thus, the combined mode of the WDI+T6+cultivar with accumulated low Cd content could be considered an optimized cultivation scheme to obtain no Cd contaminated kernels with high grain yield and water-use efficiency in mildly polluted paddy fields.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Cadmium Controlled terms:Cultivation - Fertilizers - Grain (agricultural product) - Hydrated lime - Irrigation - Lime - Plants (botany) - Soils - Water conservation - Water resources - Water supply - Wetting Uncontrolled terms:Aboveground organs - Field experiment - Irrigation regimes - Irrigation water savings - National standard - Organic fertilizers - Water use efficiency - Wetting-drying Classification code:444 Water Resources - 446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.3 Agricultural Methods - 821.4 Agricultural Products Numerical data indexing:Mass 1.12e+03kg, Mass 1.50e+03kg, Mass 3.00e+03kg, Percentage -4.35e+01% to 2.11e+01%, Percentage 1.71e+01% to 6.10e+01% DOI:10.13227/j.hjkx.202005182 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239868 Title:Seasonal Variation Characteristics of Eukaryotic Microbial Community Composition in the Source Water Reservoir Title of translation:水源水库真核微生物种群结构季相演替特征 Authors:Zhang, Hai-Han (1); Huang, Xin (1); Huang, Ting-Lin (1); Liu, Kai-Wen (1); Ma, Man-Li (1); Liu, Xiang (1); Miao, Yu-Tian (1); Zong, Rong-Rong (1) Author affiliation:(1) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5804-5813 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Eukaryotic micro-organisms occur extensively in the aquatic environment and play an important role in ecological functions. Therefore, revealing the succession of their communities and its driving factors is of great significance in studying the energy flow and material circulation of the water ecosystem. However, little research is available on the seasonal succession characteristics of the eukaryotic microbial community in source water reservoirs. In this study, the seasonal variation in eukaryotic community structure and its response to water quality factors were explored by monitoring the water quality of the Lijiahe Reservoir, using high-throughput sequencing technology and symbiotic network analysis. The results showed that the pH of the Lijiahe Reservoir ranged from (7.49±0.13)-(9.26±0.14), the lowest value of ρ(DO) was (7.80±0.33) mg•L-1, and the highest value of ρ(NH4+-N) was (0.31±0.01) mg•L-1. The water quality of the Lijiahe Reservoir as a whole was in accordance with the Class Ⅱ surface water standard. The Shannon index and the Chao1 richness index of the eukaryotic microbial community during the summer were significantly higher than those in spring and autumn. Arthropoda was the dominant category from late spring to mid-summer. The dominant species from late summer to autumn were members of Cnidaria and Chlorophyta. Telonema sp. was the dominant genus in late spring (50.53%) and Tetraselmis was the dominant genus in early summer (30.11%) and early autumn (41.34%). Junceella sp. had a high relative abundance in late summer and early and middle autumn. Bicosoeca sp., Oxytricha sp., and Tintinnidium sp., as key nodes, were strongly and negatively correlated with other eukaryotes. Redundancy analysis (RDA) of the eukaryotic microbial population and water quality showed that the seasonal distribution of eukaryotic microbial community structure was regulated by different water quality indexes, and there were significant differences. The results of this study will provide a scientific foundation for understanding the dynamic changes in the structure of eukaryotic microbial communities and their response to water environments in source water reservoirs.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Reservoirs (water) Controlled terms:Aquatic ecosystems - Aquatic organisms - Microorganisms - Quality control - Surface waters - Water quality Uncontrolled terms:Community seasonal succession - Eukaryotic microorganisms - Eukaryotics - High-throughput sequencing - Microbial communities - Network response - Network response relationship - Seasonal variation - Source water reservoir - Source waters Classification code:441.2 Reservoirs - 444.1 Surface Water - 445.2 Water Analysis - 454.3 Ecology and Ecosystems - 461.9 Biology - 471 Marine Science and Oceanography - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 3.011E+01%, Percentage 4.134E+01%, Percentage 5.053E+01% DOI:10.13227/j.hjkx.202104301 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239929 Title:WRF-Chem Simulations of the Impacts of Uncertainty in VOCs Emissions on Ozone Formation and Control Strategies Title of translation:VOCs源强不确定性对臭氧生成及污染防治影响的模拟分析 Authors:Wang, Feng (1); Wang, Jian-Wei (1); Yang, Ning (2); Zhai, Jing (3); Hou, Can (3) Author affiliation:(1) Anhui Institute of Environmental Science and Technology Co., Ltd., Hefei; 230031, China; (2) Coordinated Law Enforcement Branch of Xuanzhou Ecology and Environment District Bureau, Xuanchen; 242000, China; (3) Anhui Institute of Meteorological Science, Hefei; 230031, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5713-5722 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study utilized the WRF-Chem model, with modified chemical modules that were added as diagnostic variables. This facilitated the evaluation of the impacts of uncertainty in VOC emissions on ozone formation and control strategies that few studies have investigated in China. The performance metrics of WRF-Chem meteorology simulations and O3 and NO2 simulations were evaluated. The results indicated that some metrics were far superior to those from previous studies. We used the bottom-up VOC emission inventories of intercontinental chemical transport experiment-phase B (INTEX-B) for anthropogenic sources, the fire inventory from NCAR version 1 (FINNv1) for biomass burning sources, and the model of emissions of gases and aerosols from nature (MEGAN) for biogenic sources. We evaluated the changes in the ozone production rate [P(O3)], ozone concentration, and the indicator of Ln/Q while the emission inventories were improved by the satellite observation data as a constraint. It produced 13%-82% increases in the P(O3) peaks in Beijing and resulted in a 42%(22.5×10-9 h-1) enhancement in the P(O3) monthly average, with 68% increases in AVOC emissions. The predominant contribution to P(O3) was the reaction of HO2+NO, which accounted for 68% in Beijing. A 68% increase in AVOC emissions reduced the reaction to 65%. Under the improvement source, P(O3) generally increased to 2×10-9-4×10-9 h-1. The areas with large seasonal increases in O3 were mainly concentrated in the Beijing-Tianjin-Hebei, Yangtze River Delta, and Pearl River Delta central cities and surrounding areas and large cities in China. The conclusion that these areas are basically VOC-sensitive areas is consistent with those of previous studies. Overall, after the source of VOCs is improved, the increase in O3 concentration in NOx-sensitive areas is minor, not exceeding 4×10-9, whereas the increase in some VOC-sensitive areas exceeds 20×10-9. Changes in the source strength of VOCs will affect the determination of NOx-and VOC-sensitive areas during the formation of O3. In particular, a significant underestimation of the source strength of VOCs will exaggerate the range of VOC-sensitive areas, thereby reducing the effectiveness of O3 control strategies.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Volatile organic compounds Controlled terms:Aerosols - Nitrogen oxides - Ozone - Uncertainty analysis Uncontrolled terms:Control strategies - Ozone control - Ozone formation - Ozone(O3) - Sensitive area - Uncertainty - Uncertainty in volatile organic compound emission - Volatile organic compound emission - WRF-chem model - WRF/Chem Classification code:804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 922.1 Probability Theory Numerical data indexing:Percentage 1.30E+01% to 8.20E+01%, Percentage 4.20E+01%, Percentage 6.50E+01%, Percentage 6.80E+01%, Time -1.44E-05s, Time 8.10E-05s DOI:10.13227/j.hjkx.202103188 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239864 Title:Ammonium Nitrogen Fertilizer and Humic Acid Synergically Promote the Removal of Cd from Soil by Tagetes patula L. Title of translation:铵态氮肥和腐殖酸协同促进孔雀草对土壤中Cd的去除 Authors:Wang, Bing-Qing (1); Yang, Qin (1); Li, Hong-Ying (2); Xiong, Qi-Zhong (1); Xu, Gang (1); Sun, Rui-Bo (1); Tian, Da (1); Li, Jun-Li (1); Gao, Hong-Jian (1); Ye, Xin-Xin (1) Author affiliation:(1) Anhni Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei; 230036, China; (2) Institute of Soil and Fertilizer, Anhui Academy of Agricultural Sciences, Hefei; 230001, China Corresponding author:Ye, Xin-Xin(yexx@ahau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6006-6013 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to enhance the remediation potential of Tagetes patula L. on cadmium (Cd)-contaminated soil, field experiments were conducted to study the effects of ammonium nitrogen fertilizer (N) and humic acid (HA) on the growth of Tagetes patula L. and the removal of Cd from soil. The results showed that N treatment and the combined treatment of N and humic acid (NHA) significantly increased the biomass of the plants. Compared with that of the control (CK), the shoot biomass of the plants under NHA treatment increased by 2.49 times and 1.52 times in Feidong soil and 2.28 times and 1.74 times in Changfeng soil, respectively. The N and HA treatments, especially the NHA treatment, reduced the soil pH value during the growth period of the plant. The soil pH value in the NHA treatment decreased by 0.76 and 0.84 units in Feidong and Changfeng soils, respectively. The HA treatment significantly increased the DOC concentration in Feidong and Changfeng soils. The NHA and HA treatments significantly promoted the growth and development of the root system and improved the morphological characteristics of the plant. In the NHA treatment, the available Cd content increased by 64.1% and 53.1% in Feidong and Changfeng soils, respectively. The corresponding values in the accumulation of Cd in plants were 7.17 times and 4.15 times in Feidong and Changfeng soils, respectively. The maximum removal rates of Cd in Feidong and Changfeng soils were 17.06% and 14.08% under the NHA treatment, respectively. The results showed that the combination of ammonium nitrogen fertilizer and humic acid had a potential application prospect in enhancing the remediation of Cd-contaminated soil by Tagetes patula L.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Sulfur compounds Controlled terms:Cadmium - Nitrogen compounds - Nitrogen fertilizers - Organic acids - pH - Remediation - Soil pollution - Soils Uncontrolled terms:Acid treatments - Collaborative remediation - Contaminated soils - Field experiment - Humic acid - pH value - Phytoextraction - Soil pH - Tagetes patula - Tagetes patulum L Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1 Chemistry, General - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.2 Agricultural Chemicals Numerical data indexing:Percentage 1.408E+01%, Percentage 1.706E+01%, Percentage 5.31E+01%, Percentage 6.41E+01% DOI:10.13227/j.hjkx.202104053 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126246 Title:Hydrochemical Characteristic and Their Controlling Factors in the Yarkant River Basin of Xinjiang Title of translation:新疆叶尔羌河流域地表水水化学特征及控制因素 Authors:Zhang, Jie (1, 2); Zhou, Jin-Long (1, 2); Zeng, Yan-Yan (1, 2); Tu, Zhi (1, 2); Ji, Yuan-Yuan (1, 2); Sun, Ying (1, 2); Lei, Mi (1, 2) Author affiliation:(1) College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi; 830052, China; (2) Xinjiang Hydrology and Water Resources Engineering Research Center, Urumqi; 830052, China Corresponding author:Zhou, Jin-Long(zjzhoujl@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1706-1713 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the hydrochemical characteristics of surface water in the Yarkant River Basin of Xinjiang and their controlling factors were analyzed using a Piper trilinear diagram, Gibbs diagram, saturation index, ion proportional relationship, and other methods. The study has significance to the surface water resources in the basin for development and utilization. The results indicated that the pH of the surface water ranged from 7.40 to 8.33, with a mean value of 7.92, which was weakly alkaline. The mean value of the total dissolved solids (TDS) of the river, canal, and reservoir water exhibited an increasing trend. The TDS mean of the river was 429.24 mg•L-1, higher than the average value of rivers worldwide (115 mg•L-1). The hydrochemical types of the river water were predominantly HCO3•SO4-Ca•Na and SO4•HCO3•Cl-Ca•Na•Mg types, of the canal water was mainly HCO3•SO4•Cl-Ca•Na type, and of the reservoir water was mostly the SO4•Cl-Na•Ca type. The TDS of the river water along the Yarkant River and Tiznap River demonstrated a continuous increase and fluctuation trend, respectively, while the variation of the primary ions was relatively complex. The primary ions of surface water were mostly influenced by rock weathering, evaporation crystallization, and cation exchange, in which gypsum and rock salt were predominantly dissolved in the process of rock weathering. In addition, human activities had significant effects on the chemical composition of the surface water downstream.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Surface water resources Controlled terms:Alkalinity - Hydrochemistry - Ions - Reservoirs (water) - Rivers - Watersheds - Weathering Uncontrolled terms:Cation exchanges - Chemical compositions - Controlling factors - Development and utilizations - Hydrochemical characteristics - Piper Trilinear diagram - Proportional relationships - Total dissolved solids Classification code:441.2 Reservoirs - 444.1 Surface Water - 481.2 Geochemistry - 801.1 Chemistry, General Numerical data indexing:Mass_Density 1.15e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 4.29e-01kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202009136 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065971 Title:Spatial Variation Characteristics and Remote Sensing Retrieval of Total Suspended Matter in Surface Water of the Yangtze River Title of translation:长江干流表层水体悬浮物的空间变化特征及遥感反演 Authors:Li, Jian-Hong (1, 2); Huang, Chang-Chun (1); Zha, Yong (1); Wang, Chuan (1); Shang, Na-Na (1); Hao, Wei-Yue (1) Author affiliation:(1) School of Geography, Nanjing Normal University, Nanjing; 210023, China; (2) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China Corresponding author:Huang, Chang-Chun(huangchangchun_aaa@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5239-5249 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Total suspended matter(TSM)is an important parameter that describes optical characteristics and water pollution level. Remote sensing was used to obtain suspended matter concentrations in the planar water body, which can monitor and analyze the reliability of turbidity and pollution levels. In this study, a semi-empirical model of suspended matter along the Yangtze River mainstream(from Chongqing to Shanghai)was constructed based on the field measured hyperspectral data and suspended matter concentration and its components, with reference to MODIS(1-4 band), Landsat 8(1-5 band), Sentinel 2(2-6 band), HJ-B1(1-4 band), and other commonly used band ranges. The results show that: ① Turbidity and TSM of the Yangtze River mainstream increased from Chongqing to Shanghai during the dry season, whereas the proportion of OSM to TSM(OSM/TSM)decreased from Chongqing to Shanghai. ② The spectral properties of chlorophyll-a were not obvious; however, it showed a bimodal spectral characteristic of suspended matter concentration. Due to the low concentration of suspended matter in the water(<114.68 mg•L-1), the first peak value was significantly higher than the second peak. However, peak reflection and position had an obvious "red shift" phenomenon in the direction of the wavelength. ③ The reflectance values of the Yangtze River mainstream were most sensitive to the concentration of suspended matter in the 600-710 nm and 475-550 nm bands. Most of these fall in the green and red band of MODI, Landsat 8, Sentinel 2, and HJ-1B satellites. Therefore, the commonly used satellites have a band setting to detect the inversion of turbidity degree index of the Yangtze River main stream water body. The Sentinel 2 satellite band is most suitable for the inversion of suspended matter concentration in the Yangtze River mainstream. The mean absolute percentage error(MAPE)and root mean square error(RMSE)of the optimal exponential model were 10.23 mg•L-1 and 23%, respectively.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Remote sensing Controlled terms:Mean square error - Reflection - River pollution - Rivers - Satellites - Turbidity Uncontrolled terms:Chongqing - Empirical model - Remote sensing inversion - Remote-sensing - Spatial variations - Suspend matter concentration - Suspended matters - Total suspended matter - Yangtze River - Yangtze river mainstream Classification code:453 Water Pollution - 655.2 Satellites - 741.1 Light/Optics - 922.2 Mathematical Statistics Numerical data indexing:Mass 1.023E-05kg, Mass 1.1468E-04kg, Percentage 1.00E00%, Percentage 2.30E+01%, Size 4.75E-07m to 5.50E-07m, Size 6.00E-07m to 7.10E-07m DOI:10.13227/j.hjkx.202103245 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066045 Title:Security Risk and Influencing Factors of Agro-Products in Farmland Soil Around a Typical Mining Smelter Title of translation:典型矿冶区周边农业用地农产品安全风险及影响因素 Authors:Huo, Yan-Hui (1, 2); Wang, Mei-E (1); Xie, Tian (1); Jiang, Rong (1); Chen, Wei-Ping (1, 2) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Wang, Mei-E(mewang@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5526-5534 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The security risks of heavy metal pollution in agro-products are becoming increasingly serious. This paper investigated the heavy metal contamination of farmland soils and agro-products around a typical mining smelter in Hunan province, and explored the influencing factors based on principal component and correlation analyses. The results showed that the soils were significantly contaminated by heavy metals, with a mean concentrations of Cd, Cu, Pb, and Zn of 9.12, 358, 303, and 185 mg•kg-1, respectively, pH range from 4.67 to 7.22. All the sites included were under strict control. With regards to the agro-products, the concentration of heavy metal elements were different, and the order of heavy metal concentrations was Zn>Cu>Pb>Cd, with an order of biological enrichment factor(BCF)of Cd>Zn>Cu>Pb. Over-the-standard elements in agro-products included Pb and Cd at 78% and 41%, respectively, which indicated a higher security risk from these products. The accumulation of the same heavy metals in leaf vegetables were generally higher than sweet potatoes and solanaceous vegetables. The heavy metal concentrations in soils corresponded to the first principal component(P<0.01), with the variance reaching 88.0%, which dominated the sources of Cd, Cu, Pb, and Zn in agro-products. The enrichment characteristics were mainly affected by the type of crops, and was also regulated by the soil pH, cation exchange capacity, and soil organic matter(the correlation coefficients of r were -0.407-0.641, P<0.05). In conclusion, there was a combined heavy metal pollution and high risk in soils and agro-products. Therefore, the planting of crops in the study area should be avoided, and soil remediation measures should be implemented to reduce security risks.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Soil pollution Controlled terms:Cadmium - Copper - Crops - Farms - Lead compounds - Principal component analysis - Remediation - Risk assessment - Soil conservation - Soils - Vegetables Uncontrolled terms:Agro-products - Enrichment characteristics - Farmland soils - Heavy metal concentration - Heavy metal contamination - Heavy metals pollution - Hunan province - Principal-component analysis - Security risks - Soil products Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 544.1 Copper - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Mass 1.85E-04kg, Percentage 4.10E+01%, Percentage 7.80E+01%, Percentage 8.80E+01% DOI:10.13227/j.hjkx.202103036 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066038 Title:Effects of Biochar and Straw Return on Soil Aggregate and Organic Carbon on Purple Soil Dry Slope Land Title of translation:生物炭和秸秆还田对紫色土旱坡地土壤团聚体与有机碳的影响 Authors:Deng, Hua (1); Gao, Ming (1); Long, Yi (2); Lai, Jia-Xin (1); Wang, Ying-Yan (1); Wang, Zi-Fang (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China Corresponding author:Wang, Zi-Fang(zifangw@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5481-5490 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The aim of the study was to understand the impact of biochar and straw return on soil aggregates and organic carbon for soil improvement of the newly cultivated purple soil dry slope land in the Three Gorges Reservoir area. In this study, a field test was used to set five treatment pairs with regards to soil aggregate composition and organic carbon distribution: no fertilization(CK), conventional fertilization(NPK), optimized fertilization(GNPK), chemical fertilizer reduction combined with straw(RSD), and chemical fertilizer reduction combined with biochar(BC). The results showed that fertilization can improve the level of soil fertility, especially with the RSD and BC treatments. The soil aggregates of each fertilization treatment were<0.25 mm in size. Compared with the CK, each treatment significantly increased the aggregate content of 0.5-5 mm particles, and the values of MWD, GMD, and R0.25. Further, the treatments significantly reduced the value of D and PAD0.25(P<0.05), and each fertilization treatment significantly increased the soil organic carbon content, of which BC(6.73 g•kg-1)and RSD(5.45 g•kg-1)were significantly better than NPK(5.05 g•kg-1)and GNPK(3.63 g•kg-1). The<0.25 mm aggregates had the highest contribution rate of organic carbon(34.92%-59.49%), while the>5 mm aggregates had the lowest contribution rate of organic carbon(1.55%-6.01%). The BC treatment significantly increased the organic carbon contribution rate of 5-2 mm and 2-1 mm agglomerates(P<0.05), while the contribution rate of NPK, RSD, and GNPK was the most significant for 0.5-0.25 mm(P<0.05). Each fertilization treatment increased the yield of rapeseed and corn, with large inter-annual differences, but the overall difference between treatments was not significant. The stability of soil aggregates and crop yields showed an upward trend with the increase of soil organic carbon. Biochar and straw returning to the field may promote the formation of large and medium aggregates in soil, effectively improve the stability of aggregates, increase organic carbon content, and promote crop yields. It is therefore an effective measure to improve the soil structure of purple soil and improve soil quality.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Soils Controlled terms:Aggregates - Fertilizers - Organic carbon Uncontrolled terms:% reductions - 'Dry' [ - Biochar - Chemical fertilizers - Contribution rate - Dry slope - Fertilisation - Purple soils - Re-turn-on - Soil aggregate Classification code:406 Highway Engineering - 412.2 Concrete Reinforcements - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.2 Agricultural Chemicals Numerical data indexing:Mass 3.63E-03kg, Mass 5.05E-03kg, Mass 5.45E-03kg, Mass 6.73E-03kg, Percentage 1.55E+00% to 6.01E+00%, Percentage 3.492E+01% to 5.949E+01%, Size 2.00E-03m to 1.00E-03m, Size 2.50E-04m, Size 5.00E-03m to 2.00E-03m, Size 5.00E-03m, Size 5.00E-04m to 2.50E-04m, Size 5.00E-04m to 5.00E-03m DOI:10.13227/j.hjkx.202103257 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582261 Title:Analysis of Phytoplankton Community Stability and Influencing Factors in a Tributary of the Three Gorges Reservoir Title of translation:三峡库区支流浮游植物群落稳定性及其驱动因子分析 Authors:He, Shu-Han (1); Ouyang, Tian (1); Zhao, Lu (1); Ji, Lu-Lu (1); Yang, Song-Qi (1); Shi, Jun-Qiong (1); Wu, Zhong-Xing (1) Author affiliation:(1) Key Laboratory of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of Plant Ecology and Resources in Three Gorges Reservoir Region, Southwest University, Chongqing; 400715, China Corresponding author:Wu, Zhong-Xing(wuzhx@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3242-3252 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Changes in the community stability of freshwater phytoplankton not only induce a series of ecological environment problems but also influence freshwater ecosystem service functions. To understand the changes in community stability and its driving factors, phytoplankton and environmental parameters were analyzed at 11 sample sites in Huaxi River, a tributary of the Three Gorges Reservoir, in spring, summer, autumn, and winter. Moreover, the resource use efficiency (RUEPP), phytoplankton richness (S), phytoplankton evenness (J), and community turnover (BC) were also determined. Results showed that a total of 8 phyla, including 103 genera and 380 species, were identified in Huaxi River throughout the year. Among them, 264 species were collected in spring, 181 in summer, 197 in autumn, and 183 in winter. The number of Chlorophyta was the largest, followed by Bacillariophyta, Euglenophyta, and Cyanophyta. The number of species and cell density in S0 site were the smallest, while those in S2 site were the largest. The RUEPP was fluctuated in four seasons, with the maximum in summer and the minimum in autumn. BC was significantly negatively correlated with RUEPP, phytoplankton richness, total phosphorus (TP), orthophosphate (PO43--P), total nitrogen (TN), nitrate (NO3--N), permanganate index, and conductivity (Spc); however, it was significantly positively correlated with phytoplankton evenness and dissolved oxygen (DO). These results suggest that water level regulation in the Three Gorges Reservoir has a significant impact on the structure of phytoplankton community in Huaxi River, which leads to the instability of phytoplankton community and easy replacement, and the degree of community turnover is affected by the combined effect of biological and abiotic factors.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:Phytoplankton Controlled terms:Dissolved oxygen - Ecosystems - Reservoirs (water) - Rivers - Springs (components) - Stability - Water levels Uncontrolled terms:Community stability - Ecological environment problems - Environmental parameter - Freshwater ecosystem - Number of species - Phytoplankton community - Three gorges reservoir - Water-level regulation Classification code:441.2 Reservoirs - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 601.2 Machine Components DOI:10.13227/j.hjkx.202012096 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688834 Title:Effect of Biochar on Soil Enzyme Activity & the Bacterial Community and Its Mechanism Title of translation:生物炭对土壤酶活和细菌群落的影响及其作用机制 Authors:Feng, Hui-Lin (1); Xu, Chen-Sheng (2); He, Huan-Hui (2); Zeng, Qiang (2); Chen, Nan (1); Li, Xiao-Long (2); Ren, Tian-Bao (1); Ji, Xiao-Ming (1); Liu, Guo-Shun (1) Author affiliation:(1) Henan Biochar Engineering Research Center, College of Tobacco Sciences, Henan Agricultural University, Zhengzhou; 450002, China; (2) Nanping Tobacco Company of Fujian Province, Nanping; 353000, China Corresponding authors:Ren, Tian-Bao(tianbao1016@126.com); Ji, Xiao-Ming(jxm0371@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:422-432 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Biochar-based fertilizers can improve the mineralization of carbon and nitrogen in soil and enhance the soil micro-ecological environment due to particular physical and chemical properties. It is of great significance to explore the underlying mechanism of biochar-based fertilizer in the regulation of soil microorganisms and soil enzyme activity to improve soil quality. Field experiments were conducted to investigate the effects of different biochar-based fertilizer rates [0 (CK2), 0.6 (T1), 0.9 (T2), 1.2 (T3), and 1.5 (T4) t•hm-2]on soil nutrients, soil enzyme activity, and bacterial community structure. The results showed that with the application of biochar-based fertilizer, soil bulk density decreased, while the pH value, available P, available K, organic matter content, and the C/N ratio increased by 0.32%-5.83%, 14.09%-23.16%, 0%-38.70%, 7.49%-14.16%, and 4.06%-10.13%, respectively, compared to that of the CK2 treatment. With increasing rates of biochar-based fertilizer, the enzyme activity first increased and then decreased. Invertase (INV), urease (URE), catalase (CAT), and neutral phosphatase (NPH) activity under the application of biochar-based fertilizer were 63.73%-166.37%, 117.52%-174.03%, 12.98%-23.59%, and 60.84%-119.71% higher than that of CK2, respectively. The corresponding bacterial diversity was significantly improved, especially with regard to the increase in the abundance of growth promoting bacteria, such as Gemmatimonadetes and Proteobacteria, and decreased the abundance of Acidobacteria and Actinobacteria. The correlation analysis showed that soil C/N ratio was the key factor affecting soil enzyme activity, and there was a significant positive correlation between soil enzyme activity and bacterial diversity. There were significantly positive correlations among the activities of the above four soil enzymes and the relative abundance of Gemmatimonadetes (P<0.01), with CAT being the key factor affecting the bacterial community structure. This study revealed a relationship between soil enzyme activity and microbial colonies, which provides a theoretical basis and mechanism for applying biochar to regulate the soil enzyme and micro-ecological environment.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Enzyme activity Controlled terms:Bacteria - Ecology - Nitrogen fertilizers - Soils Uncontrolled terms:Bacterial community structure - Correlation analysis - Ecological environments - Organic matter content - Physical and chemical properties - Positive correlations - Soil enzyme activity - Soil micro-organisms Classification code:454.3 Ecology and Ecosystems - 461.9 Biology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally Numerical data indexing:Percentage 3.20e-01% to 5.83e+00%, Percentage 4.06e+00% to 1.01e+01%, Percentage 6.08e+01% to 1.20e+02%, Percentage 6.37e+01% to 1.66e+02% DOI:10.13227/j.hjkx.202005285 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651098 Title:Characteristics and Sources of VOCs at Different Ozone Concentration Levels in Tianjin Title of translation:天津市夏季不同臭氧浓度级别VOCs特征及来源 Authors:Wang, Wen-Mei (1); Gao, Jing-Yun (2); Xiao, Zhi-Mei (2); Li, Yuan (2); Bi, Wen-Kai (2); Li, Li-Wei (2); Yang, Ning (2); Xu, Hong (2); Kong, Jun (2) Author affiliation:(1) School of Environmental Science & Engineering, Tianjin University, Tianjin; 300350, China; (2) Tianjin Eco-Environmental Monitoring Center, Tianjin; 300191, China Corresponding author:Gao, Jing-Yun(Aileen_jing@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3585-3594 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To further study the effect of volatile organic compounds (VOCs) on ozone pollution, the characteristics and sources of VOCs at different ozone (O3) concentration levels were analyzed, using high-resolution online monitoring data obtained from Tianjin in the summer of 2019. Results showed that VOCs concentrations were 32.94, 38.10, 42.41, and 47.12 μg•m-3, when the O3 concentration levels were categorized as excellent, good, light pollution, and moderate pollution, respectively. VOCs were composed of alkanes, alkenes, alkynes and aromatics, which accounted for 61.72%- 63.36%, 14.96%- 15.51%, 2.73%- 4.13%, and 18.53%- 19.10%, respectively, of VOCs concentrations at different O3 concentration levels. Among them, the proportion of alkanes was slightly higher when O3 concentration was categorized as good or light pollution, alkenes and alkynes accounted for the highest proportion when O3 concentration was excellent, and the proportion of aromatics was highest during periods of moderate pollution. The main VOCs species were propane, ethane, ethylene, toluent, n-butane, isopentane, m/p-xylene, propylene, acetylene, n-hexane, isobutene, benzene, n-pentane, isoprene, and 1,2,3-trimethylbenzene. The concentration percentage of isopentane, n-pentane, benzene, ethylene, propylene, n-butane, and isobutane increased gradually as O3 concentration increased. Significant increases in isoprene and 1,2,3-trimethylbenzene were observed during periods of light and moderate pollution. Alkenes and aromatics had higher ozone formation potential (OFP), and the contribution of alkenes to OFP declined as the O3 level rose, whereas that of aromatics increased. Ethylene, propylene, m/p-xylene, 1,2,3-trimethylbenzene, toluene, isoprene, trans- 2-butene, and cis- 2-pentene were the key species for O3 generation, and the contribution ratio of 1,2,3-trimethylbenzene, isoprene, propylene, and ethylene to OFP increased significantly during light or moderate O3 pollution. Positive matrix factorization was applied to estimate the source contributions of VOCs. Automobile exhaust, solvent usage, liquefied petroleum gas (LPG)/gasoline evaporation, combustion, petrochemical industrial emissions, natural sources, and other industrial emissions were identified as major sources of VOCs in summer. As O3 concentration level rose, the contribution percentage of automobile exhaust, LPG/gasoline evaporation, petrochemical industrial emissions, and natural sources increased gradually, whereas the contribution of combustion and other industrial emissions decreased overall. The contribution of solvent usage was lower when O3 levels indicated light or moderate pollution than when it was good.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Air pollution Controlled terms:Aromatization - Benzene - Butane - Butenes - Combustion - Ethylene - Evaporation - Factorization - Fiber optic sensors - Gas emissions - Hexane - Industrial emissions - Isoprene - Liquefied petroleum gas - Ozone - Paraffins - Petrochemicals - Propylene - Volatile organic compounds Uncontrolled terms:1 ,2 ,3-trimethylbenzene - Concentration levels - Contribution ratios - Liquefied petroleum gas (LPG) - Ozone concentration - Ozone formation potentials - Positive Matrix Factorization - Source contributions Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 523 Liquid Fuels - 741.1.2 Fiber Optics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.85e+01% to 1.91e+01%, Percentage 6.17e+01% to 6.34e+01% DOI:10.13227/j.hjkx.202101129 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651074 Title:Spatio-temporal Distribution Characteristics and Driving Factors of Zooplankton in Hongze Lake Title of translation:洪泽湖浮游动物时空分布特征及其驱动因素 Authors:Chen, Ye (1, 2); Peng, Kai (2); Zhang, Qing-Ji (2); Cai, Yong-Jiu (2); Zhang, Yong-Zhi (1); Gong, Zhi-Jun (2); Xiang, Xian-Ling (1) Author affiliation:(1) School of Ecology and Environment, Anhui Normal University, Wuhu; 241002, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding authors:Gong, Zhi-Jun(zjgong@niglas.ac.cn); Xiang, Xian-Ling(xiangxianling@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3753-3762 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Hongze Lake is the fourth largest freshwater lake in China and is an important source of water for surrounding industrial and agricultural processes and fishery resources. Analyzing the changes in the zooplankton community structure in Hongze Lake can provide scientific support for the scientific management of its ecology and environment. A one-year monthly monitoring study was conducted from March 2017 to February 2018 to analyze the temporal and spatial changes in species composition, density, and biomass of zooplankton in Hongze Lake, as well as the seasonal changes in community diversity and dominant species. Canonical correspondence analysis was employed to explore the relationships between the temporal and spatial changes in zooplankton and the environmental factors of Hongze Lake. The results showed that the average annual density of zooplankton in Hongze Lake was 383.87 ind•L-1, and the average annual biomass was 1.36 mg•L-1. The community structure of zooplankton in Hongze Lake varied greatly across time and space. Community structure varied greatly in summer, and zooplankton density and biomass reached a maximum in autumn. The community structure of the zooplankton was the simplest in winter. Chengzi Bay and Lihewa Bay exhibited an abundance of many different zooplankton species with limited spatial differentiation, whereas the zooplankton in the overflow area comprised fewer species but exhibited greater spatial variation. In summer, water level and temperature are the dominant factors, whereas in autumn and winter, the dominant factors are water temperature, nutrients, and chlorophyll. Canonical correspondence analysis showed that the temporal and spatial changes in zooplankton community structure in Hongze Lake were mainly determined by water level, total phosphorus, water temperature, and total nitrogen content. Water level fluctuation has the greatest direct impact on zooplankton community structure, and water quality regulation has indirect impact.
© 2021, Science Press. All right reserved. Number of references:47 Main heading:Lakes Controlled terms:Agricultural robots - Biomass - Temperature - Water levels - Water quality Uncontrolled terms:Canonical Correspondence Analysis - Scientific management - Spatial differentiation - Spatiotemporal distributions - Temporal and spatial changes - Total nitrogen content - Water-level fluctuation - Zooplankton communities Classification code:445.2 Water Analysis - 641.1 Thermodynamics Numerical data indexing:Mass_Density 1.36e-03kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202010195 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779613 Title:Characteristics of Partial Denitrification in Biofilm System Title of translation:生物膜系统中部分反硝化实现特性 Authors:Yu, Li-Fang (1, 2); X.-X., Zhang; Q., Zhang; X.-Y., Wang; D.-C., Peng; R.-X., Zhang Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Ecology and Environment, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Xi'an Municipal Engineering Design and Research Institute Co., Ltd., Xi'an; 710068, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4390-4398 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As an intermediate form of microbial denitrification, nitrite serves as a key substrate for anaerobic ammonium oxidation (ANAMMOX). This study investigated the partial dentification (PD) characteristics and the coupling feasibility of PD+ANAMMOX in the biofilm system, using a moving bed biofilm reactor which was operated for 120 days. After 40 days of operation with a C/N ratio of 3.0 and filling fraction of 20%, the nitrate-to-nitrite transformation ratio (NTR) reached (69.38±3.53)%, and enzymatic assays indicated that the activities of nitrate reductase (NAR) had increased from 0.03 to 0.45 μmol•(min•mg)-1 while the activities of nitrite reductase (NIR) had decreased from 0.18 to 0.02 μmol•(min•mg)-1. Illumina high-throughput sequencing analysis revealed that the proportion of genus of Thauera bacteria to total microorganism increased from 0.3% (d1) to 37.27% (d64). Finally, the effluent had a total nitrogen (TN) concentration of (6.41±1.50) mg•L-1, indicating a total nitrogen removal ratio of (88.16±2.71)% and confirming the feasibility of PD+ANAMMOX in the biofilm system.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Nitrogen removal Controlled terms:Biofilms - Denitrification - Nitrates - Reaction intermediates - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - High-throughput sequencing - Microbial denitrification - Moving bed biofilm reactors - Nitrate reductase - Nitrite reductase - Total nitrogen removal - Transformation ratio Classification code:452.4 Industrial Wastes Treatment and Disposal - 462.5 Biomaterials (including synthetics) - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Age 1.10e-01yr, Age 3.29e-01yr, Percentage 2.00e+01% DOI:10.13227/j.hjkx.202102063 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651044 Title:Source Apportionment of Soil PAHs in Lanzhou Based on GIS and APCS-MLR Model Title of translation:基于GIS及APCS-MLR模型的兰州市主城区土壤PAHs来源解析 Authors:Guan, Xian-Xian (1, 2); Zhou, Xiao-Ping (1, 2); Lei, Chun-Ni (2); Peng, Yan-Wen (3); Zhang, Song-Lin (1) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China; (2) Lanzhou Customs Technology Center, Lanzhou; 730010, China; (3) College of Food Science and Engineering, Gansu Agricultural University, Lanzhou; 730070, China Corresponding authors:Zhou, Xiao-Ping(zhxp1123@163.com); Zhang, Song-Lin(zhangsonglin65@nwnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3904-3912 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To evaluate the pollution by polycyclic aromatic hydrocarbons (PAHs) in the surface soil of the core urban area of Lanzhou, 62 topsoil samples were collected from the area. The soil samples were analyzed for the content of 16 priority PAHs, using gas chromatography-mass spectrometry. Descriptive statistical methods were used to characterize contamination by PAHs. An absolute principal component analysis-multiple linear regression (APCS-MLR) model was applied to determine the sources of PAHs in the soil samples, and the accuracy of the model results was verified. Finally, the main influence regions of each source were determined with a geo-statistical method. The results showed that the contents of ∑16 PAHs in the surface soils of Lanzhou ranged from 1 069 to 7 377 μg•kg-1, with an average of 2 423 μg•kg-1. High molecular weight PAHs (4- 6 rings) were dominant, accounting for 72.81% of the ∑16 PAHs. Verification results of the APCS-MLR model showed that the measured values were in good correspondence with the predicted values, which indicated that the model had good applicability for source apportionment of soil PAHs in the study area. The main sources of PAHs in Lanzhou were traffic emissions (35.42%), petroleum emissions (29.88%), and a mixture of coal and biomass combustion (33.91%). The sources were greatly affected by human activities, and high values were mainly distributed in traffic-intensive and industrial areas. The results indicated that the sources of soil PAHs were complex and influenced by anthropogenic activities in the study area. Stringent control measures should be placed on the sources and areas of influence that contribute to soil PAHs to reduce the emissions and the level of soil pollution resulting from PAHs.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Soil pollution Controlled terms:Coal combustion - Gas chromatography - Linear regression - Mass spectrometry - Polycyclic aromatic hydrocarbons - Soil pollution control - Soil surveys - Soils Uncontrolled terms:Anthropogenic activity - Areas of influences - Gas chromatography-mass spectrometry - High molecular weight - Multiple linear regressions - Polycyclic aromatic hydrocarbons (PAHS) - Source apportionment - Verification results Classification code:483.1 Soils and Soil Mechanics - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Percentage 2.99e+01%, Percentage 3.39e+01%, Percentage 3.54e+01%, Percentage 7.28e+01% DOI:10.13227/j.hjkx.202012215 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651107 Title:Immobilization Mechanism of Four Types of Amendments on Cu and Cd in Polluted Paddy Soil Title of translation:4种钝化剂对污染水稻土中Cu和Cd的固持机制 Authors:Ding, Yuan (1); Ao, Shi-Ying (1); Chen, Yi-Hong (1); Xiao, Liang-Liang (1) Author affiliation:(1) School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang; 330063, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:4037-4044 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Cu and Cd are common pollutants in the soil surrounding copper smelting enterprises. The regional characteristics of southern China results in a high risk of Cu and Cd reactivation in soil after immobilization with soil amendment. To clarify the degree of risk of secondary activation of Cu and Cd, four types of amendments, namely limestone (LS), maifanite (MF), biochar (BC), and iron modified biochar (Fe-BC), were used to study Cu and Cd fraction distribution in soil and soil colloids and the type and fractional changes of in-situ iron oxides. The results showed that the soil amendments were ranked by their immobilizing effect on soil Cu and Cd in the order LS, MF, Fe-BC, and BC; the exchangeable and carbonate-bound fractions of Cu in the soil reduced by 8.19% and 2.33%, and the readily reducible iron- and manganese-bound fractions of Cu increased by 8.00% and 2.69%, respectively, when treated with LS and MF. The risk of secondary activation of heavy metals was higher in soil treated with LS and MF than in soil treated with other amendments. The readily reducible iron- and manganese-bound fractions of Cu reduced by 2.21% and 5.90% and the organic-bound fractions of Cu increased by 4.75% and 3.48% when treated with BC and Fe-BC, respectively. This indicated that the immobilization effect tends to be stable. The exchangeable and carbonate-bound fractions of Cd in the soil decreased by 7.64%, 8.34%, 2.37%, and 6.73%, and the residual fractions increased by 8.27%, 9.18%, 5.73%, and 9.60% respectively, indicating that the amendment treatments resulted in better stability of Cd than Cu. The Cu and Cd contents of soil colloids were 489.92 mg•kg-1 and 2.57 mg•kg-1, respectively, which were considerably higher than those in soil (239.98 mg•kg-1 and 1.93 mg•kg-1, respectively). The amorphous iron oxide-bound Cu and Cd contents of soil colloids increased significantly with the application of each of the four amendment, which was the main reason and mechanism for the decrease in heavy metal bioavailability. With the extension of aging time, long-term immobilization can be achieved if the heavy metals are further transformed into crystalline iron oxide-bound and residual fractions.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Soil pollution Controlled terms:Biochemistry - Cadmium - Chemical activation - Colloids - Copper smelting - Iron oxides - Lime - Manganese - Soils Uncontrolled terms:Amorphous iron oxides - Fraction distribution - Immobilization effects - Immobilization mechanisms - Metal bioavailability - Regional characteristics - Residual fraction - Secondary activations Classification code:483.1 Soils and Soil Mechanics - 533.2 Metal Refining - 543.2 Manganese and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 801.3 Colloid Chemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.21e+00%, Percentage 2.33e+00%, Percentage 2.37e+00%, Percentage 2.69e+00%, Percentage 3.48e+00%, Percentage 4.75e+00%, Percentage 5.73e+00%, Percentage 5.90e+00%, Percentage 6.73e+00%, Percentage 7.64e+00%, Percentage 8.00e+00%, Percentage 8.19e+00%, Percentage 8.27e+00%, Percentage 8.34e+00%, Percentage 9.18e+00%, Percentage 9.60e+00% DOI:10.13227/j.hjkx.202010260 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651102 Title:Effect of Cadmium Stress on Phytochelatins in Amaranthus hypochondriacus L. During Different Growth Periods Title of translation:镉对不同生长期籽粒苋植物螯合肽的影响 Authors:Liu, Jia-Xin (1); Chen, Wen-Qing (1, 2); Yang, Li (1); Li, Na (1); Wang, Yu-Hao (1); Kang, Yu-Chen (1) Author affiliation:(1) College of Architecture & Environment, Sichuan University, Chengdu; 610065, China; (2) State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu; 610065, China Corresponding author:Chen, Wen-Qing(scuChen2020@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:4053-4060 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Phytochelatins (PCs) can chelate heavy metal ions due to their large number of thiols and play an important role in heavy metal accumulation and detoxification. A. hypochondriacus K472, a cadmium (Cd) enriched plant, was selected as the research object. Six Cd treatment concentrations, namely 0 (CK), 10 (T1), 25 (T2), 50 (T3), 100 (T4), and 200 mg•kg-1 (T5), were used to analyze the variation of PCs in different growth stages under different degrees of Cd stress and to explore the mechanism by which PCs chelate and detoxify Cd. The results showed that the plant height, root length, and biomass of K472 decreased significantly with increasing Cd concentration, and the range of decrease gradually became less pronounced with the growth and development of K472. K472 exhibited the maximum ability to enrich Cd during the middle vegetative growth period. The maximum concentration was 6 695.35 mg, and the maximum bioconcentration factor was 6.3. In addition, with increasing Cd concentration, the Cd content of K472 roots, stems, and leaves was positively correlated with the concentration of PCs. PC3 had the strongest response to Cd stress in roots and stems, whereas PC2 responded to stress in leaves. For practical applications, harvesting K472 in the middle of vegetative growth is an optimal strategy for the remediation of Cd-contaminated soil.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Cadmium Controlled terms:Bioaccumulation - Chelation - Detoxification - Metal ions - Plants (botany) - Remediation - Soil pollution Uncontrolled terms:Bio-concentration factors - Cd-contaminated soils - Different growth stages - Growth and development - Heavy metal accumulation - Maximum concentrations - Optimal strategies - Vegetative growth periods Classification code:454.2 Environmental Impact and Protection - 461.9 Biology - 483.1 Soils and Soil Mechanics - 531.1 Metallurgy - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions Numerical data indexing:Mass 6.95e-04kg DOI:10.13227/j.hjkx.202012024 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945132 Title:O3 Source Characteristics of an Industrial Area in the Yangtze River Delta Based on Boundary Observations Title of translation:基于边界观测的长三角某工业区O3来源特征 Authors:Huang, Qing (1, 2); Huang, Yin-Zhi (1, 2); Zhang, Shan (3); Jin, Dan (3); Gao, Song (3); Xiu, Guang-Li (1, 2) Author affiliation:(1) Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management of Chemical Pollutants, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, Shanghai; 200237, China; (3) Shanghai Environmental Monitoring Center, Shanghai; 200235, China Corresponding authors:Xiu, Guang-Li(xiugl@ecust.edu.cn); Xiu, Guang-Li(xiugl@ecust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4621-4631 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To study the characteristics of ozone sources in a petrochemical industrial park in Shanghai, O3 and its precursors were synchronously and continuously measured for 3 months(June-August 2020)alongside meteorological parameters using an online monitoring system. The Texas Commission on Environmental Quality(TCEQ)method and principal component analysis(PCA)were used to study the contribution of regional background and local O3 concentrations in the industrial zone, the results of which were compared. The results indicated that: ① During the observation period, the dominant wind directions in the park were southeast and east, and the average temperature was 27.12℃. The daily average ρ(VOCs-36), ρ(NOx), and ρ(O3)was 32.05-240.51, 10.15-47.51, and 31.81-144.43μg•m-3, respectively. Alkanes are the most abundant of 36 VOCs; ② The regional background concentrations based on the TCEQ method ranged from 32.63 to 191.13μg•m-3, and the local concentrations ranged from 16.08 to 134.25 μg•m-3. The percentage contribution of the regional background ranged from 32.6% to 87.7%. The PCA analysis showed that the regional background concentrations ranged from 66.3 to 219.83μg•m-3; ③ The variations in local O3 concentrations based on the TCEQ analysis broadly correspond to the variations in ozone formation potential in the park. The two analysis methods were consistent, verifying that the results are reliable; and ④ After eliminating the calculation error caused by the abnormal concentrations recorded at some stations, the proportion of background O3 in the region was generally within the range 75%-95% during the observation period. Overall, regional transport was the main source of O3 in the industrial park, and O3 pollution in the surrounding cities should be the focus of pollution control alongside joint prevention and control measures in the Yangtze River Delta region.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Principal component analysis Controlled terms:Ozone - Parks - Pollution control - Quality control - River pollution Uncontrolled terms:Industrial area - Industrial parks - Locally generated - O3 source - Observation Period - Principal-component analysis - Quality methods - Regional background - Texas Commission on Environmental Quality - Yangtze river delta Classification code:453 Water Pollution - 804 Chemical Products Generally - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics Numerical data indexing:Age 2.499E-01yr, Mass 1.608E-08kg to 1.3425E-07kg, Mass 3.181E-08kg to 1.4443E-07kg, Mass 3.263E-08kg to 1.9113E-07kg, Mass 6.63E-08kg to 2.1983E-07kg, Percentage 3.26E+01% to 8.77E+01%, Percentage 7.50E+01% to 9.50E+01% DOI:10.13227/j.hjkx.202101199 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779900 Title:Stability of Soil Aggregates at Different Altitudes in Qinling Mountains and Its Coupling Relationship with Soil Enzyme Activities Title of translation:秦岭不同海拔土壤团聚体稳定性及其与土壤酶活性的耦合关系 Authors:Ma, Huan-Fei (1); Hu, Han (1); Li, Yi (1); Guo, Yao-Xin (2); Ren, Cheng-Jie (3); Zhao, Fa-Zhu (1) Author affiliation:(1) Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an; 710127, China; (2) College of Life Sciences, Northwest University, Xi'an; 710127, China; (3) College of Agronomy, Northwest A& F University, Yangling; 712100, China Corresponding author:Zhao, Fa-Zhu(zhaofazhu@nwu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4510-4519 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore changes in soil aggregate stability along an elevation gradient, and its regulating factors, soil samples were taken from the 0-10 cm surface layer at 3 different elevations on Taibai Mountain. We measured and analyzed the distribution of soil aggregates, physical and chemical properties, microbial biomass, and extracellular enzymes. The results showed that: ① the soil aggregates from the 3 elevations had mean weight diameters (MWD) of 2.17 mm, 1.83 mm, and 1.82 mm (increasing elevation), and geometric mean diameters (GMD) of 1.66 mm, 1.39 mm, and 1.32 mm, respectively. ② The change in soil aggregate stability along an elevation gradient was regulated by extracellular enzymes in the soil, in particular, the LAP in soil meso-aggregate and the BG in soil micro-aggregate. ③ Microorganisms can alleviate the N limitation at high elevations by adjusting the relative production of extracellular enzymes and altering nutrient utilization efficiency, which also changes soil aggregate stability along an elevation gradient. The results of this study have important scientific significance for soil quality evaluation and ecological environment protection in Taibai Mountain.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Soils Controlled terms:Aggregates - Chemical analysis - Enzymes - Landforms - Stability Uncontrolled terms:Coupling relationships - Ecological environment protections - Extracellular enzymes - Geometric mean diameters - Mean weight diameter - Physical and chemical properties - Soil aggregate stability - Soil quality evaluation Classification code:406 Highway Engineering - 481.1 Geology - 483.1 Soils and Soil Mechanics Numerical data indexing:Size 0.00e+00m to 1.00e-01m, Size 1.32e-03m, Size 1.39e-03m, Size 1.66e-03m, Size 1.82e-03m, Size 1.83e-03m, Size 2.17e-03m DOI:10.13227/j.hjkx.202101236 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126250 Title:Levels, Characteristics, and Potential Source of Micro(meso)plastic Pollution of Soil in Liaohe River Basin Title of translation:辽河流域土壤中微(中)塑料的丰度, 特征及潜在来源 Authors:Han, Li-Hua (1, 2, 3); Xu, Li (1, 2); Li, Qiao-Ling (3); Lu, An-Xiang (1, 2); Yin, Jing-Wei (1, 2); Tian, Jia-Yu (1, 2) Author affiliation:(1) Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing; 100097, China; (2) Beijing Municipal Key Laboratory of Agricultural Environment Monitoring, Beijing; 100097, China; (3) School of Science, North University of China, Taiyuan; 030051, China Corresponding author:Xu, Li(xuliforever@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1781-1790 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the Liaohe River basin as the research object, the morphology, abundance, and distribution characteristics of micro(meso) plastics of soil in Liaohe River basin were studied based on the density flotation principle and the technique of stereo microscope and micro-FTIR and the significant factors affecting the distribution of the micro(meso)plastics and their potential sources were reasonably speculated. The results indicated that the average abundance of the soil micro(meso)plastic is (145.83±211.46) n•kg-1. The most abundant types of micro(meso)plastics are debris (46.00%), <1 000 μm (39.57%), PP (41.71%), and white (46.86%). Among them, Rayon, PES, and PET micro(meso)plastics are primarily in the shape of fibrous (>85%), PE is mostly in the shape of film and fragments (96.91%), PP is mainly in the shape of fragments (85.62%), and PS is primarily in the shape of foam. Industrial activities (express delivery companies, plastic factories, and clothing factories), agricultural activities (plastic mulch, sewage irrigation, and sludge composting), population density, and sewage treatment plants, etc, may lead to higher levels of micro(meso)plastic abundance in the soil of the study area. Plastic products (pesticide bottles, chemical fertilizer packaging bags, woven bags, and plastic agricultural films), sewage discharge and irrigation, and foam materials used for packaging and decoration are the potential sources of soil micro(meso)plastic in the region.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Plastic products Controlled terms:Agricultural robots - Elastomers - Fertilizers - Films - Flotation - Garment industry - Irrigation - Packaging materials - Plastics industry - Polyethylene terephthalates - Population statistics - River pollution - Rivers - Sewage treatment plants - Soils - Watersheds - Weaving Uncontrolled terms:Agricultural activities - Chemical fertilizers - Distribution characteristics - Industrial activities - Plastic pollutions - Population densities - Sewage discharges - Stereo-microscopes Classification code:444.1 Surface Water - 452.2 Sewage Treatment - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 694.2 Packaging Materials - 802.3 Chemical Operations - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 817.1 Polymer Products - 818.2 Elastomers - 819.5 Textile Products and Processing - 821.3 Agricultural Methods Numerical data indexing:Percentage 3.96e+01%, Percentage 4.17e+01%, Percentage 4.60e+01%, Percentage 4.69e+01%, Percentage 8.56e+01%, Percentage 9.69e+01% DOI:10.13227/j.hjkx.202006186 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945434 Title:Application of Various Methods to Extract Microplastic from Typical Soils in China Title of translation:多种微塑料提取方法在中国典型土壤中的应用 Authors:Zhao, Xiao-Li (1); Liu, Zi-Han (1); Cong, Chen-Yu (1); Han, Jian-Qiao (1, 2) Author affiliation:(1) Institute of Soil and Water Conservation, Northwest A& F University, Yangling; 712100, China; (2) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling; 712100, China Corresponding authors:Han, Jian-Qiao(hjq13@163.com); Han, Jian-Qiao(hjq13@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4872-4879 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Microplastics have been found in many environmental systems, such as oceans, terrestrial soils, sediments, and bodies of freshwater. Microplastic pollution in soils has received extensive international attention; however, there is currently no unified standard extraction method. To identify appropriate extraction and component identification methods for microplastics in typical soils in China, samples were identified and their polymer component properties examined using ATR-FTIR(Thermo Nicolet IS 20). The effects of three treatments of water+oil(T1), a saturated NaCl solution+oil(T2), and a saturated NaCl solution(T3)on the detection of four types of microplastics [polyethylene terephthalate(PET), polypropylene(PP), polystyrene(PS), and polyethylene(PE)]in four typical soils(loess, black soil, red soil, and purple soil)were examined. The results showed that: ① The extraction rates of the T3 treatment decreased with microplastic density. For PP, PE, and PS, the extraction rates exceeded 86.67%, and the extraction rates of PET were 0%-13.30%. ② The extraction rates of the four kinds of microplastics were 86.67%-100.00% in loess, black soil, and purple soil using the T1 and T2 solutions; however, the residual oil on the surface of microplastics influenced the identification using FTIR. Furthermore, the cleaning effect of PE and PS was poor after wiping with anhydrous ethanol. ③ In red soil, the extraction rates of PET were 56.60% and 50.00% in T1 and T2, respectively; in the T3 treatment, the extraction rates of PET, PE, and PP were 3.33%, 10.00%, and 56.67%, respectively. These results show that the extraction rates of four types microplastics are highest for loess, black soil, and purple soil using T1 and T2, although these two methods need to be combined with anhydrous ethanol cleaning. T3 dispose making the leak of microplastics PET with the density higher than 1 g•cm-3. Methods to extract microplastics from red soils require further research. Overall, this study can inform the investigation and treatment of microplastic pollution in typical regional soils in China.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Microplastic Controlled terms:Ethanol - Extraction - Plastic bottles - Polypropylenes - Sediments - Sodium chloride - Soils Uncontrolled terms:Black soil - Extraction rate - FTIR - Ingredient identification - Microplastics - NaCl solution - Purple soils - Red soils - Soil-soil - Typical soils Classification code:453 Water Pollution - 454.2 Environmental Impact and Protection - 454.3 Ecology and Ecosystems - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 694.2 Packaging Materials - 802.3 Chemical Operations - 804.1 Organic Compounds - 815.1.1 Organic Polymers - 817.1 Polymer Products Numerical data indexing:Mass 1.00E-03kg, Percentage 0.00E00% to 1.33E+01%, Percentage 1.00E+01%, Percentage 3.33E+00%, Percentage 5.00E+01%, Percentage 5.667E+01%, Percentage 5.66E+01%, Percentage 8.667E+01% to 1.00E+02%, Percentage 8.667E+01% DOI:10.13227/j.hjkx.202102013 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945487 Title:Content and Ecological Risks of Heavy Metals in Soil with Different Land Uses in a Rapidly Urbanizing Area Title of translation:快速城市化区域不同用地类型土壤重金属含量分布特征及生态风险 Authors:Li, Meng-Ting (1, 2); Shen, Cheng (1); Wu, Jian (1, 2); Huang, Shen-Fa (1); Li, Da-Yan (1); Wang, Min (1) Author affiliation:(1) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (2) School of Ecological and Environmental Sciences, East China Normal University, Shanghai; 200241, China Corresponding authors:Wu, Jian(wuj@saes.sh.cn); Wu, Jian(wuj@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4889-4896 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Taking the Minhang District of Shanghai as a typical rapidly urbanizing area, and based on 595 soil samples from 36 plots, the content of eight heavy metals in soils from five different land uses were analyzed. The ecological risk was evaluated using the Nemerow composite index and the potential ecological risk index. The results showed that the variation coefficients of the heavy metals Zn and Cd were highest, and were notably affected by human activities. The content of heavy metals in industrial land soil was relatively high compared to residential land and cultivated land soils, and heavy metal content was lowest in public management and service land soil. The Nemerow composite index of Zn and Cd was high, corresponding to severe and moderate levels of pollution, respectively. The other heavy metals were found at warning or light levels of pollution. The potential ecological risks posed by heavy metals in the soils from different land uses, in descending order, were heavy-metal-related industry land> non-heavy-metal-related industry land≈residential land> cultivated land≈public management and service land. Industrial land had a greater risk of heavy metal pollution due to industrial operations, complex historical production, and widely variable levels of management. Heavy metal accumulation also tended to occur in residential land and cultivated land soils. Therefore, the prevention of soil heavy metal pollution in association with different land uses, and the control of associated risks during redevelopment, are key challenges in rapidly urbanizing area.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Risk assessment Controlled terms:Bioaccumulation - Cadmium - Housing - Land use - Soil pollution - Soils - Zinc Uncontrolled terms:Composite index - Cultivated lands - Ecological risk assessment - Ecological risks - Heavy metal related industrial land - Heavy metals in soil - Industrial land - Potential ecological risk - Rapid urbanization area - Rapid urbanizations Classification code:403 Urban and Regional Planning and Development - 403.1 Urban Planning and Development - 461.9 Biology - 483.1 Soils and Soil Mechanics - 546.3 Zinc and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202101194 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945442 Title:Effects of Feedstock Material and Pyrolysis Temperature on Dissolved Organic Matter in Biochars Title of translation:原料和热解温度对生物炭中可溶性有机质的影响 Authors:Yan, Dai-Hong (1, 2); Ma, Ya-Pei (1, 2); Song, Kai-Yue (1, 2); Ma, Hong-Liang (1, 2); Gao, Ren (1, 2); Yin, Yun-Feng (1, 2) Author affiliation:(1) School of Geographical Sciences, Fujian Normal University, Fuzhou; 350007, China; (2) State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou; 350007, China Corresponding authors:Yin, Yun-Feng(yunfengyin@163.com); Yin, Yun-Feng(yunfengyin@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:5030-5036 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The aim of this study was to investigate the effects of feedstock material and pyrolysis temperature on the content and spectral properties of dissolved organic matter(DOM)in biochars. Biochars were produced from the pyrolysis of rice straw and Cunninghamia lanceolata litter at three temperatures(350, 500, and 650℃). The results showed that the pH values of the two biochars with pyrolysis temperature increases were improved from 8.10 and 6.56 to 10.53 and 8.23, respectively. The pyrolysis temperature had no significant effect on the total C content of biochar, but the feedstock material and their interaction had significant effects on the total C content of the biochar(P< 0.05). The dissolved organic carbon(DOC)content of the two types of biochar first decreased and then increased with increasing pyrolysis temperature, and the content of DOC of the biochar derived from rice straw was significantly higher than that from Cunninghamia lanceolata litter under the same temperature(P< 0.05). The feedstock material had no significant effect on the SUVA254 value of DOM, but temperature and its interactive effect with the feedstock material had a significant effect on the SUVA254 values(P< 0.05). Maximum DOC SUVA254 values occurred at 500℃ in the two types of biochar, indicating the highest degree of aromatization. Three-dimensional fluorescence spectra showed that the DOM components of the two types of biochar were dominated by fulvic acid-like and humic acid-like material, which had different responses to pyrolysis temperature. FTIR spectra suggested that the DOM of the biochars had absorption peaks at similar positions, in five regions, and the stretching vibration of aliphatic C-H gradually weakened with an increase in pyrolysis temperature. Therefore, the biochars produced at higher pyrolysis temperatures(500℃ and 650℃)had lower DOC contents but a higher aromatization degree and humification degree, and were more stable, compared to the biochars produced at a lower pyrolysis temperature(350℃).
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Organic acids Controlled terms:Aromatization - Biogeochemistry - Biological materials - Dissolution - Feedstocks - Fourier transform infrared spectroscopy - Organic carbon - Pyrolysis - Stream flow - Stretching Uncontrolled terms:Biochar - Cunninghamia lanceolata - Dissolved organic carbon - Dissolved organic matters - Feedstock materials - Interaction - Material temperature - Pyrolysis temperature - Rice straws - Spectral properties Classification code:407.2 Waterways - 461.2 Biological Materials and Tissue Engineering - 481.2 Geochemistry - 535.2 Metal Forming - 631.1 Fluid Flow, General - 801 Chemistry - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202010132 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945134 Title:Adsorption Characteristics of Phosphate on Cerium Modified Water Hyacinth Biochar Title of translation:铈改性水葫芦生物炭对磷酸盐的吸附特性 Authors:Wang, Guang-Ze (1); Zeng, Wei (1); Li, Shuai-Shuai (1) Author affiliation:(1) National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing; 100124, China Corresponding author:Zeng, Wei(zengwei@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4815-4825 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A cerium-modified water hyacinth biochar adsorbent(Ce-BC)was developed through co-precipitation-pyrolysis to remove phosphate from wastewater. The study investigated the effects of Ce-BC dosing, wastewater pH, reaction time, and coexisting competing ions on the adsorption process. The results showed that the best adsorption performance was achieved with a maximum adsorption capacity of 35.00 mg•g-1 at a Ce-BC dosage of 0.4 g•L-1 and an initial pH range of 3-10 in the phosphate solution. The adsorption process of phosphate by the Ce-BC followed the quasi-second-order kinetic model, and a phosphate removal efficiency of 98% within 1 h was achieved. In addition, Ce-BC had a strong anti-competitive anion interference and a good regeneration ability; after four cycles of regeneration, the adsorption efficiency remained above 90%. Characterization using field emission scanning electron microscopy-energy dispersive spectrometry(FESEM-EDS), Fourier-transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), and X-ray photoelectron spectroscopy(XPS)showed that the adsorption mechanism of Ce-BC with respect to phosphate mainly involved ligand exchange and inner sphere complexation. The Ce-BC adsorbent prepared in this study effectively removed and recovered phosphates found in domestic sewage, thereby avoiding the eutrophication of water bodies as well as enabling the recovery and utilization of phosphorus resources.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Adsorption Controlled terms:Cerium oxide - Eutrophication - Field emission microscopes - Fourier transform infrared spectroscopy - Phosphorus - Recovery - Scanning electron microscopy - Sewage - X ray photoelectron spectroscopy Uncontrolled terms:Adsorption characteristic - Adsorption process - Adsorption regeneration - Biochar - Biochar adsorbents - Co-precipitation - Fixed bed - Phosphorus recovery - Water Hyacinth - Water hyacinth biochar Classification code:452.1 Sewage - 741.3 Optical Devices and Systems - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass 3.50E-05kg, Mass 4.00E-04kg, Percentage 9.00E+01%, Percentage 9.80E+01%, Size 7.62E-02m to 2.54E-01m, Time 3.60E+03s DOI:10.13227/j.hjkx.202102087 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945119 Title:Coating-derived VOCs Emission Characteristics and Environmental Impacts from the Furniture Industry in Guangdong Province Title of translation:广东省家具行业基于涂料类型的VOCs排放特征及其环境影响 Authors:Zeng, Chun-Ling (1); Shao, Xia (2); Liu, Rui-Yuan (1); Yao, Yi-Juan (1); Li, Yin-Song (1); Hou, Mo (1); Liu, Yang (1); Fan, Li-Ya (1, 3, 4, 5); Ye, Dai-Qi (1, 3, 4, 5) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (3) National Engineering Laboratory for Volatile Organic Compounds Pollution Control Technology and Equipment, Guangzhou; 510006, China; (4) Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou; 510006, China; (5) Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, Guangzhou; 510006, China Corresponding authors:Fan, Li-Ya(fanly@scut.edu.cn); Fan, Li-Ya(fanly@scut.edu.cn); Fan, Li-Ya(fanly@scut.edu.cn); Fan, Li-Ya(fanly@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4641-4649 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To determine the differences in emissions among different types of coatings, such as solvent-based, water-based, solvent-based ultra-violet(UV), water-based UV, and powder coatings, representative furniture manufacturing companies were selected for analysis. The emission concentrations and compositional characteristics of volatile organic compounds(VOCs)in different types of coatings were compared and studied. The ozone formation potential(OFP)and secondary organic aerosol formation potential(SOAFP)of the different types of coatings were also analyzed. Solvent-based coatings has higher TVOC concentrations, OFPs, and SOAFPs than water-based, solvent-based UV, water-based UV, and powder coatings. The concentrations and composition of VOCs emitted from the different types of coatings were also different. The main VOC groups of the solvent-based and solvent-based UV coatings were aromatic hydrocarbons and oxygenated volatile organic compounds(OVOCs). Specifically, the proportions of aromatic hydrocarbons are 41.91%-60.67% and 42.51%-43.00%, respectively, and the proportions of OVOCs were 24.75%-41.29% and 41.34%-43.21%, respectively. OVOCs accounted for the highest proportion of VOCs in the water-based, water-based UV, and powder coatings, at 54.02%-62.10%, 55.23%-64.81%, and 42.98%-46.45%, respectively. The major VOC compound of the solvent-based coatings was styrene(14.68%), and the main component of the water-based coatings was methylal(14.61%). The main species of VOCs from the solvent-based UV and water-based UV coatings were butyl acetate(15.36% and 20.56%, respectively). The most abundant species from the powder coatings was ethyl 3-ethoxy propionate(20.19%). Aromatic hydrocarbons were the most important contributor to the OFP of the solvent-based and solvent-based UV coatings, accounting for 79.84% and 80.32%, respectively. Aromatic hydrocarbons(51.48% and 36.71%)and OVOCs(42.30% and 41.03%)were the major contributors to the OFP of the water-based and water-based UV coatings, respectively. Aromatic hydrocarbons(43.46%), OVOCs(28.06%), and olefins(25.24%)were the main factors affecting the OFP of the powder coatings. Aromatic hydrocarbons dominate the SOAFP of solvent-based, water-based, solvent-based UV, water-based UV, and powder coatings, accounting for more than 99%.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Volatile organic compounds Controlled terms:Aerosols - Automobile manufacture - Binary alloys - Gas chromatography - Mineral oils - Organic solvents - Ozone - Powder coatings - Styrene - Toluene - Volatile fatty acids Uncontrolled terms:Emission concentration - Formation potential - Furniture industry - Organic aerosol formation - Ozone formation potentials - Secondary organic aerosol formation potential - Solvent based - Type of coating - Ultra violet - Water based Classification code:513.3 Petroleum Products - 662.1 Automobiles - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 813.2 Coating Materials Numerical data indexing:Percentage 1.461E+01%, Percentage 1.468E+01%, Percentage 1.536E+01%, Percentage 2.019E+01%, Percentage 2.056E+01%, Percentage 2.475E+01% to 4.129E+01%, Percentage 2.524E+01%, Percentage 2.806E+01%, Percentage 3.671E+01%, Percentage 4.103E+01%, Percentage 4.134E+01% to 4.321E+01%, Percentage 4.191E+01% to 6.067E+01%, Percentage 4.23E+01%, Percentage 4.251E+01% to 4.30E+01%, Percentage 4.298E+01% to 4.645E+01%, Percentage 4.346E+01%, Percentage 5.148E+01%, Percentage 5.402E+01% to 6.21E+01%, Percentage 5.523E+01% to 6.481E+01%, Percentage 7.984E+01%, Percentage 8.032E+01%, Percentage 9.90E+01% DOI:10.13227/j.hjkx.202101235 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945433 Title:Response of Photosynthetic Bacterial Community to Cadmium Contamination in Paddy Soil Title of translation:稻田土壤光合细菌群落对镉污染的响应 Authors:Luo, Lu-Yun (1); Jin, De-Cai (2); Wang, Dian-Dong (1); Chen, Ang (3); Zhang, De-Yong (4); Zeng, Jun (5); Kuang, Wei (6); Zhang, Zhuo (3); Liu, Yong (3) Author affiliation:(1) School of Advanced Agriculture and Bioengineering, Yangtze Normal University, Chongqing; 408100, China; (2) Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha; 410125, China; (4) Hunan Hybrid Rice Research Center, Hunan Academy of Agricultural Sciences, Changsha; 410125, China; (5) Institute of Microbiology, Xinjiang Academy of Agricultural Sciences, Urumqi; 830091, China; (6) Rice Research Institute, Hunan Academy of Agricultural Sciences, Changsha; 410125, China Corresponding authors:Zhang, Zhuo(lionkingno.1@163.com); Liu, Yong(haoasliu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4988-4997 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Heavy metal pollution in rice fields leads to huge losses in rice yield every year and is thus of increasing concern. Therefore, it is important to understand the changes in the microecology and physicochemical properties of paddy soil under different levels of cadmium pollution. The purpose of this study was to investigate the response of the photosynthetic bacterial community in paddy soil to different cadmium pollution levels using 16S sequencing technology. The results showed that pH, total cadmium, and available cadmium content decreased gradually with the increase in cadmium pollution. The soil α diversity was slightly different in the high cadmium (Cd), medium Cd, and low Cd groups; however, the enriched photosynthetic populations and photosynthetic bacterial communities were significantly different among these groups. The effective connections between photosynthetic bacterial species in the high Cd group were significantly greater than those in the medium and low Cd groups, the connections were closer, and the density was higher. Alkaline nitrogen, pH, available (P/K), total (N/P), organic matter, total cadmium, and available cadmium were important factors affecting the photosynthetic bacterial community and were significantly correlated with the photosynthetic bacterial community, explaining 59.90% of the variation in the photosynthetic bacterial community. Effective Cd content was significantly positively correlated with Methylorubrum populi, Methylorubrum extorquens, Methylobacterium sp. Leaf125, and Rhodopseudomonas sp. AAP120 (R> 0.05, P< 0.05). This study will provide a theoretical basis for the microbial remediation of cadmium contamination in paddy fields. This study is important for understanding the effects of cadmium pollution on specific functional microbial populations in paddy soils.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Cadmium Controlled terms:Alkalinity - Bacteria - Physicochemical properties - Soil pollution - Soils Uncontrolled terms:16s sequencing - Bacterial community - Cadmium contamination - Cadmium content - Cadmium pollution - Heavy metals pollution - Microbial communities - Microbial community distribution - Paddy soils - Purple photosynthetic bacteria Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1 Chemistry, General - 801.4 Physical Chemistry Numerical data indexing:Electrical conductance 1.60E+01S, Percentage 5.99E+01% DOI:10.13227/j.hjkx.202104349 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003356 Title:Overview on Habitat Monitoring Methods Under Watershed Ecological Space Management Title of translation:流域水生态空间管控下生境监测方法概述 Authors:Yin, Kun (1); Liu, Hai-Jiang (1); Wang, Guang (1); Jin, Xiao-Wei (1) Author affiliation:(1) China National Environmental Monitoring Centre, Beijing; 100012, China Corresponding author:Jin, Xiao-Wei(jinxw@cnemc.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1581-1590 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Habitat consist of the physical, chemical, and biological features that support the survival and growth of aquatic organisms, and the maintenance of biological processes and ecological function. However, habitat is spatially and temporally heterogeneous and displays spatial autocorrelation, mean that at large spatial scales, the maintenance of ecological function is complex. Consequently, it is difficult to characterize and interpret habitat characteristics, especially over large space-time scales. Although a wide variety of habitat monitoring methods have been proposed, there is still lack of well-developed methods for long-term tracking and monitoring of habitat changes at the watershed scale. Here, the characteristics of watershed habitats and the importance of monitoring in environmental management were explored based on the concept, purpose, and significance of habitat monitoring. Several monitoring methods were summarized and compared, and the key scientific limitations and requirements of habitat monitoring (e.g., spatial scale, survey scope, characteristic parameters, data acquisition, etc.) evaluated. Based on this, key aspects for successful habitat monitoring in China are proposed as baseline information for the research and application of habitat monitoring for watershed-scale ecological space management.
© 2021, Science Press. All right reserved. Number of references:80 Main heading:Monitoring Controlled terms:Aquatic organisms - Data acquisition - Ecosystems - Environmental management - Watersheds Uncontrolled terms:Biological features - Biological process - Ecological functions - Habitat monitoring - Long-term tracking - Research and application - Spatial autocorrelations - Survival and growth Classification code:444.1 Surface Water - 454 Environmental Engineering - 471 Marine Science and Oceanography - 723.2 Data Processing and Image Processing DOI:10.13227/j.hjkx.202007287 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239874 Title:Long-term Trends in Illicit Drugs Abuse in the City Assessed by Wastewater Analysis Title of translation:污水分析方法监测城市毒品滥用长期趋势 Authors:Cao, Yu (1); Dong, Xiao-Tang (1); Shao, Xue-Ting (1); Liu, Lin (1); Wang, De-Gao (1) Author affiliation:(1) College of Environmental Sciences and Engineering, Dalian Maritime University, Dalian; 116026, China Corresponding author:Wang, De-Gao(degaowang@dlmu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5912-5920 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Illicit drug abuse is a social issue of global concern, and it is of great significance to monitor the situation of illicit drug abuse in cities. Wastewater-based epidemiology (WBE) was employed to investigate the abuse of illicit drugs in Dalian. Wastewater samples were collected from 22 wastewater treatment plants in Dalian from 2020 to 2021. The concentrations of biomarkers of methamphetamine (METH), heroin (HER), ketamine (KET), 3,4-methylenedioxymethamphetamine (MDMA), and cocaine (COC) and the urine metabolites methamphetamine, morphine, ketamine, 3,4-methylenedioxymethamphetamine, and benzoylecgonine (BE) were analyzed and determined using the gas chromatography derivatization method. The results showed that the mean ρ(methamphetamine), ρ(morphine), and ρ(ketamine) in 2020 were 23.69, 23.21, and 2.40 ng•L-1, respectively, and their respective mean concentrations in 2021 were 20.64, 20.92, and 0.47 ng•L-1. 3,4-methylenedioxymethamphetamine and benzoylecgonine were not detected in any samples. According to the relevant information, the consumption of five illicit drugs was estimated, and their abuse trends in Dalian were analyzed based on the monitoring data from previous years. The consumption of methamphetamine and heroin increased in 2019 and significantly decreased in 2020, remaining basically unchanged until 2021. The level of ketamine abuse remained at a low level. This study provides the basis for the real-time monitoring of drug abuse in Dalian, which is of great significance to the prevention and control of illicit drug crimes.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Amines Controlled terms:Drug products - Gas chromatography - Metabolites - Wastewater treatment Uncontrolled terms:Benzoylecgonine - Dalian - Derivatizations - Drug abuse - Illicit drug - Ketamine - Long-term trend - Methylenedioxymethamphetamine - Trend - Wastewater analysis Classification code:452.4 Industrial Wastes Treatment and Disposal - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Mass 2.40E-12kg, Mass 4.70E-13kg DOI:10.13227/j.hjkx.202104189 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404273 Title:Simultaneous Domestication of Short-cut Nitrification Denitrifying Phosphorus Removal Granules Title of translation:短程硝化反硝化除磷颗粒污泥的同步驯化 Authors:Wang, Wen-Qi (1); Li, Dong (1); Gao, Xin (1); Liu, Bo (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China Corresponding author:Li, Dong(lidong2006@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2946-2956 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this experiment, three replicated SBR reactors were operated using asynchronous acclimation of the phased method (A/O-A/O/A), simultaneous domestication of continuous aeration by A/O/A, and simultaneous domestication of intermittent aeration by A/O/A. Using artificial water distribution as the influent substrate, flocculent sludge was inoculated and granulated by hydraulic selection. The domestication and nitrogen and phosphorus removal characteristics of shortcut nitrification denitrifying phosphorus removal granules under different operation modes were assessed. The results show that simultaneous domestication of intermittent aeration by A/O/A has the most efficient under the combination of short aeration time (140 min) and low aeration strength [3.5 L•(h•L)-1]. The average removal rates of carbon, nitrogen, and phosphorus were 90.74%, 91.15%, and 95.66%, respectively, which could achieve synchronous removal during later stable operation. The particle size was 895 μm, and the particles were small but uniformly dense in microscope observations. The f value (MLVSS/MLSS) was kept stable at 0.8-0.85 and sludge had a high biomass due to the alternate aerobic/anoxic operation with intermittent aeration. This supported anoxic heterotrophic bacteria at the core of the particles, which was conducive to the stability of the granular sludge structure. Batch experiments showed that the specific ammonia-oxidation rate of the simultaneous domestication of intermittent aeration by A/O/A system was 3.38 mg•(g•h)-1, and denitrifying phosphate accumulating organisms (DPAOs) able to utilize nitrite as electron acceptor accounted for 65.46%. This was more conducive to the simultaneous domestication and enrichment of ammonia-oxidizing bacteria (AOB) and NO2--type DPAOs, ensuring a stable treatment effect.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Nitrogen removal Controlled terms:Ammonia - Bacteria - Denitrification - Granulation - Nitrification - Nitrogen - Particle size - Phosphorus - Water supply systems Uncontrolled terms:Ammonia oxidizing bacteria - Denitrifying phosphate-accumulating organisms - Denitrifying phosphorus removal - Electron acceptor - Heterotrophic bacterias - Intermittent aeration - Nitrogen and phosphorus removal - Shortcut nitrification Classification code:446.1 Water Supply Systems - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 6.55e+01%, Percentage 9.07e+01%, Percentage 9.12e+01%, Percentage 9.57e+01%, Size 8.95e-04m, Time 8.40e+03s DOI:10.13227/j.hjkx.202010236 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582376 Title:Pollution Characteristics and Sources of Wintertime Atmospheric Brown Carbon at a Background Site of the Yangtze River Delta Region in China Title of translation:中国长三角背景点冬季大气棕碳污染特征及来源解析 Authors:Zhao, Yu (1); Wu, Can (1); Wang, Yi-Qian (1); Chen, Yu-Bao (1); Lü, Shao-Jun (1); Wang, Fang-Lin (1); Du, Wei (1); Liu, Shi-Jie (1); Ding, Zhi-Jian (1); Wang, Ge-Hui (1, 2) Author affiliation:(1) Key Laboratory of Geographic Information Sciences, Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai; 200241, China; (2) Institute of Eco-Chongming, Shanghai; 200062, China Corresponding author:Wang, Ge-Hui(ghwang@geo.ecnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3127-3135 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the pollution characteristics and sources of atmospheric brown carbon (BrC) in Chongming Island, a background site of the Yangtze River Delta (YRD) region in China, PM2.5 samples collected from December 2018 to January 2019 were analyzed to determine their chemical compositions and optical properties. The results showed that the light absorption coefficient (Abs365,M) of BrC extracted by methanol at 365 nm was (5.39±3.33) M-1•m-1, which was 1.3 times of the water extracted BrC. Both increased significantly with the increase of pH values, suggesting that less acidic conditions can enhance the light absorption ability of BrC. In winter, both Abs365 and MAE365 (mass absorption efficiency) were higher in the nighttime than in the daytime. A strong linear correlation observed between Abs365 and levoglucosan (R2=0.72) indicated that many light absorbing substances in Chongming Island were derived from biomass burning emissions. During the campaign, nitro-aromatic compounds (NACs) and PAHs accounted for (1.5±1.1) ng•m-3 and (8.3±4.7) ng•m-3, respectively, contributing to 0.1% and 0.067% of the absorption of the total BrC at 365 nm, respectively. Positive matrix factorization (PMF) analysis further showed that biomass and fossil fuel combustions were the main sources of BrC in Chongming Island in winter, accounting for 56% of the total BrC, followed by secondary formation, accounting for 24% of the total BrC, with road dust contributing only 6%.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:River pollution Controlled terms:Atmospheric chemistry - Bromine compounds - Carbon - Chemical analysis - Factorization - Fossil fuels - Light absorption - Optical properties - Polycyclic aromatic hydrocarbons - Water absorption Uncontrolled terms:Absorption abilities - Biomass burning emissions - Chemical compositions - Fossil fuel combustion - Light absorption coefficients - Light-absorbing substances - Nitro aromatic compounds - Positive Matrix Factorization Classification code:443.1 Atmospheric Properties - 453 Water Pollution - 741.1 Light/Optics - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.00e-01%, Percentage 2.40e+01%, Percentage 5.60e+01%, Percentage 6.00e+00%, Percentage 6.70e-02%, Size 3.65e-07m DOI:10.13227/j.hjkx.202012002 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126212 Title:Geochemical Survey Method of Land Quality in Land Parcel Scale City: A Case Study of the Initial Area of the Xiong'an New District Title of translation:地块尺度城市土地质量地球化学调查方法:以雄安新区起步区为例 Authors:Zhou, Ya-Long (1, 2, 3); Guo, Zhi-Juan (1, 2, 3); Liu, Fei (1, 2, 3); Han, Wei (1, 2, 3); Kong, Mu (1, 2, 3); Zhao, Chuan-Dong (1, 2, 3); Liu, Ai-Tao (4); Peng, Min (1, 2, 3); Wang, Qiao-Lin (1, 2, 3); Wang, Cheng-Wen (1, 2, 3) Author affiliation:(1) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China; (4) Geological Survey Institution of Hebei Province, Shijiazhuang; 050081, China Corresponding authors:Guo, Zhi-Juan(gzhijuan@mail.cgs.gov.cn); Peng, Min(pmin@mail.cgs.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1989-2002 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to evaluate the land quality geochemical survey achievement in the service of the accurate management of urban land resources, the initial area of the Xiong'an New District as urbanization pathfinder in China is chosen as the research subject. The sample points were set by differential classification, and the spatial interpolation accuracy of the soil elements at a plot scale and a quantitative assessment of the consistency of the land plot (pattern spot) prediction evaluation were studied under the conditions of different sampling densities. The regional geochemical variation values randomly distributed on the plane can be reflected quantitatively by differential classification sampling, which can meet the basic demand of the quality attribute of a single plot (map spot) by the accurate management of urban land resources. The spatial variability of soil elements is mostly middle to moderate, and Cd, Cu, Pb, Hg, Se, N, P, and other elements of high spatial variability are affected by human industrial and agricultural production activities. Under the same sampling density, the larger the element variation coefficient, the worse the spatial interpolation accuracy. Although the interpolation accuracy of the same element index is affected by the sampling density, the increase in the sampling density could not identify the continuous component on the structure of the soil element content. The soil environment is clean, and the heavy metal content is lower than the GB15618-2018 standard. The interpolation results are basically consistent with the grading results of the measured values, while the contents of N, P, and K of the nutrient indices vary greatly, and the predicted and measured geochemical grades of the plots (map spot) differ substantially under the influence of factors such as human disturbance and spatial variability. The quantitative evaluation of the six different sampling densities indicates that the 16 points•km-2 sampling density adopted in the geochemical survey and evaluation of urban land quality can satisfy the needs of an accurate control of urban land resources in the study area and similar areas. The research can provide key technologies to support and serve the accurate management of urban land resources for geochemical surveys and the evaluation of land quality in land parcel scale cities.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Quality control Controlled terms:Agricultural robots - Agriculture - Geochemical surveys - Geochemistry - Grading - Heavy metals - Interpolation - Natural resources - Soils Uncontrolled terms:Agricultural productions - Geochemical variations - Heavy metal contents - Quantitative assessments - Quantitative evaluation - Randomly distributed - Spatial interpolation - Variation coefficient Classification code:481.1 Geology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.3 Quality Assurance and Control - 921.6 Numerical Methods DOI:10.13227/j.hjkx.202008133 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405310 Title:Biodegradation of Polystyrene by Geobacillus stearothermophilus Title of translation:嗜热脂肪地芽胞杆菌对聚苯乙烯的降解性能 Authors:Xing, Rui-Zhi (1); Zhao, Zi-Qiang (1); Zhao, Wen-Qi (1); Chen, Zhi (1); Chen, Jin-Feng (2); Zhou, Shun-Gui (1) Author affiliation:(1) College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou; 350002, China; (2) China Certification & Inspection Group Fujian Co., Ltd., Fuzhou; 350002, China Corresponding author:Chen, Zhi(chenzhi0529@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3056-3062 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Biodegradation is the most sustainable treatment method for waste polystyrene (PS). Thermophiles possess highly efficient biotransformation capabilities that could enhance the biodegradation efficiency of organic solid wastes. However, detailed research on the degradation of PS plastics by thermophile is scarce. Here, the degradation performance of a strain of Geobacillus stearothermophilus FAFU011 (FAFUA011) isolated from compost was examined. The results showed that strain FAFUA011 could utilize PS as the sole carbon source for growth and formed a stable biofilm on the surface of PS fragments. During 56 days of degradation, FAFU0011 caused a total mass loss of PS of 4.2% and decrease in molecular weight of 17.4%-18.2%. Based on SEM observations, FAFUA011 causes erosion hollows on the surface of PS, thus increasing the type and number of oxygen-containing structures that alter its hydrophilic properties. These changes facilitate the colonization of other microorganisms and further promote biodegradation. Based on 2D-COS analysis, the chronological order of the change in functional groups during the degradation process were identified as follows: 1 491 cm-1(C-H)>1 450 cm-1(C-H)>1 601 cm-1(C=C)>1 027 cm-1(C-O)>1 068 cm-1(C=O)>1 366 cm-1(C-OH). Overall, these results reveal that FAFU011 could promote the thermophilic bio-oxidative degradation of PS plastic.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Biodegradation Controlled terms:Composting - Polystyrenes - Waste treatment Uncontrolled terms:Biodegradation efficiency - Chronological order - Degradation process - Geobacillus stearothermophilus - Hydrophilic properties - Organic solid wastes - Oxidative degradation - Sustainable treatments Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.8 Biotechnology - 815.1.1 Organic Polymers Numerical data indexing:Age 1.53e-01yr, Percentage 1.74e+01% to 1.82e+01%, Percentage 4.20e+00% DOI:10.13227/j.hjkx.202009298 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582351 Title:Response of Microbial Community to Natural Organic Matter Input in Lake Sediments Title of translation:湖泊沉积物中微生物群落对天然有机质输入的响应 Authors:Ju, Qi (1); Zhang, Qi (1, 2); Cao, Chi-Cheng (1); Bai, Lei-Lei (3); Zhang, Hui (1) Author affiliation:(1) Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing; 210009, China; (2) Center for Disease Control and Prevention of Huzhou, Huzhou; 313000, China; (3) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Zhang, Hui(13851553232@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3263-3271 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Increased loads of biogenic and terrestrial natural organic matter into freshwater lakes are projected to be a major consequence of global climate change and cyanobacterial blooms. In this study, the effects of phytoplankton-derived organic matter (POM) and terrestrial humic acid (HA) on the activity, composition, and function of the microbial community in Lake Taihu sediments were investigated. Fluorescent spectra demonstrated that POM with high chemodiversity was composed of labile protein-like components (50%) and recalcitrant humic-like components (50%), while humic-like substances accounted for 97% of HA. Over two-month periods, the organic carbon mineralization in sediments was enhanced owing to increasing NOM concentrations; however, the carbon consumption in POM-amended sediments was significantly higher than that in sediments amended with the same concentrations of HA. Analysis of extracellular polymeric substances indicated that NOM input improved the microbial secretion of proteins and polysaccharides, increasing the aggregation and stability of the microbial community. The amendment of POM also stimulated the activity of organic matter metabolic enzymes, promoting microbial activity. Moreover, 16S rRNA gene sequencing suggested that the mineralization of NOM (especially POM) increased the diversity of the microbial community, favored the survival of Proteobacteria and Bacteroidetes, and upregulated the function genes of organic matter metabolism. These results suggest that the composition and function of microbial community in sediments were associated with the origin, composition, and concentration of NOM input.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Organic carbon Controlled terms:Biogeochemistry - Climate change - Genes - Lakes - Metabolism - Microorganisms - Mineralogy - Proteins - RNA - Sediments Uncontrolled terms:16S rRNA gene sequencing - Carbon mineralization - Cyanobacterial blooms - Extra-cellular polymeric substances - Global climate changes - Humic-like substances - Microbial communities - Natural organic matters Classification code:443.1 Atmospheric Properties - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 481.2 Geochemistry - 482 Mineralogy - 483 Soil Mechanics and Foundations - 804.1 Organic Compounds Numerical data indexing:Percentage 5.00e+01%, Percentage 9.70e+01% DOI:10.13227/j.hjkx.202011205 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582321 Title:Distribution Characteristics and Pollution Evaluation of Nitrogen and Organic Matter in Overlying Water and Sediment of Guyun River and Jinshan Lake in Zhenjiang City Title of translation:镇江市古运河和金山湖河湖上覆水体和沉积物氮及有机质分布特征及污染评价 Authors:Yuan, Lu-Bin (1); Xing, Shu-Yu (1); Liu, Xin (1); Zhou, Xiao-Hong (1); Dadzie, Adelaida Angela (1) Author affiliation:(1) School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang; 212013, China Corresponding author:Zhou, Xiao-Hong(xhzhou0214@ujs.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3186-3197 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Zhenjiang City is located in the intersection of the Yangtze River and the Beijing-Hangzhou Grand Canal, which is the most important water transportation hub in China, with abundant water resources and a dense river network. In recent years, the water quality in this region has declined with the rapid development of the economy and enhanced anthropogenic activity. Therefore, it is crucial to understand the state of water and sediment pollution in rivers and lakes of Zhenjiang City, which can provide important basic data for improving the water environment quality for this region. In total, 21 sampling sites (including 10 sites from Jinshan Lake and 11 sites from the ancient canal) in Zhenjiang City were selected, and overlying water and sediment samples were sampled in winter and summer, respectively. In addition, the physical and chemical parameters of overlying water and sediment samples were determined, respectively, and the organic index as well as organic nitrogen index were analyzed in order to evaluate the degree of sediment contamination in this region. Results showed that ① The TN concentration of overlying water changed from 1.95 mg•L-1 to 15.71 mg•L-1 in the winter and from 0.64 mg•L-1 to 12.09 mg•L-1 in the summer, with mean values of 4.01 mg•L-1 and 4.07 mg•L-1, respectively, which are higher than those of the surface water Ⅴ class standard. In addition, the ranked order of NH4+-N was as follows: winter<summer and river>lake; ② the TN content in the sediment samples ranged from 394.61 mg•kg-1 to 3 288.09 mg•kg-1 and from 869.21 mg•kg-1 to 3 598.04 mg•kg-1, respectively, with the mean values of 1 928.58 mg•kg-1 and 2 068.40 mg•kg-1. The ranked order of TN, NH4+-N, NO3--N, and Org-N was as follows: winter>summer for lake sediment samples. For river sediment samples, the ranked order of TN was winter<summer, whereas those of NH4+-N and NO3--N were winter>summer, indicating more complicated seasonal distribution for river sediment. In addition, the NO3--N content was higher in lake sediment than in river sediment, whereas that of NH4+-N was higher in river sediment than in lake sediment. The C/N ratio results indicated that the organic matter in sediments primarily resulted from endogenous pollution in this region; ③ Results of organic nitrogen index confirmed that 60% sediment samples from the lake in winter and the river in summer belong to the Ⅳ pollution level, indicating that organic nitrogen pollution existed in these samples. The results of organic index confirmed that 70% and 54.55% sediments samples belong to the Ⅱ pollution level, indicating that the sediments were not severely polluted in rivers and lakes of Zhenjiang City. The results demonstrate that sediments in rivers and lakes of Zhenjiang City are mainly polluted by nitrogen. Our findings provide important basic data for nitrogen control schemes in river water and sediment in Zhenjiang City.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:River pollution Controlled terms:Biogeochemistry - Chemical analysis - Hydraulic structures - Lakes - Nitrogen - Organic compounds - Rivers - Sediments - Water quality Uncontrolled terms:Anthropogenic activity - Beijing-Hangzhou grand canals - Distribution characteristics - Physical and chemical parameters - Pollution evaluation - Seasonal distributions - Sediment contamination - Water transportation Classification code:445.2 Water Analysis - 453 Water Pollution - 481.2 Geochemistry - 483 Soil Mechanics and Foundations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.95e-03kg/m3 to 1.57e-02kg/m3, Mass_Density 4.01e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 4.07e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 6.40e-04kg/m3 to 1.21e-02kg/m3, Percentage 5.45e+01%, Percentage 6.00e+01%, Percentage 7.00e+01% DOI:10.13227/j.hjkx.202010192 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688839 Title:Effect of Enteromorpha prolifera Biochar on the Adsorption Characteristics and Adsorption Mechanisms of Ammonia Nitrogen in Rainfall Runoff Title of translation:浒苔生物炭对雨水径流中氨氮的吸附特性及吸附机制 Authors:Chen, You-Yuan (1, 2, 3); Li, Pei-Qiang (1); Li, Xian-Chi (4); Sun, Ping (1); Zhao, Xin-Yue (1); Li, Jie (1); Li, Jin (1); Xin, Zhi-Ran (1) Author affiliation:(1) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (2) Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China; (3) Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao; 266100, China; (4) Qingdao No.9 High School, Qingdao; 266100, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:274-282 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to study the performance and mechanisms of bioretention pond media (Enteromorpha prolifera biochar) for NH4+-N removal in rainfall runoff, three kinds of alkali modified biochars (marked as BC1, BC2, and BC3) were prepared with various concentrations of NaOH solution (1, 2, and 3 mol•L-1) to explore their adsorption performance for NH4+-N. The results showed that: ① Appropriate modifications of the NaOH concentration increased the specific surface area and surface microstructure of biochar, with the content of O and the surface functional groups being enriched. In addition, BC2 possessed the best adsorption performance. ② The adsorption capacity reached a maximum when the pH was 9.0 and the dosage of biochar was 0.5 g•L-1. Compared with BC, the adsorption capacity of BC1 and BC2 increased by 6.4% and 10.8%, respectively, while BC3 decreased by 13.7%. Moreover, BC2 had an optimal adsorption efficiency with a saturated adsorption capacity of 16.76mg•g-1. ③ The adsorption mechanism of biochar belonged to chemical adsorption with a monomolecular layer. The adsorption process was promoted by the high pH of biochar, the electrostatic attraction of biochar pores, the complexation and oxidization of the functional groups of hydroxyl (-OH), carboxyl (-COOH), and carbon-oxygen single bond (C-O). To sum up, the proper amount of NaOH to modify biochar can improve the adsorption performance of NH4+-N, and the modified biochar can be used as media of the bioretention pond to remove NH4+-N.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Adsorption Controlled terms:Ammonia - Lakes - Nitrogen - Rain - Runoff - Sodium hydroxide Uncontrolled terms:Adsorption characteristic - Adsorption efficiency - Adsorption performance - Electrostatic attractions - Enteromorpha prolifera - Saturated adsorption capacity - Surface functional groups - Surface microstructures Classification code:442.1 Flood Control - 443.3 Precipitation - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 5.00e-01kg/m3 to 2.20e-02kg/m3, Molar_Concentration 3.00e+03mol/m3 to 2.20e-02mol/m3, Percentage 1.08e+01%, Percentage 1.37e+01%, Percentage 6.40e+00% DOI:10.13227/j.hjkx.202004051 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247427 Title:Effects of Different Land Use Practices on Nitrogen Loss from Runoff During Rainfall Events Title of translation:次降雨过程中不同土地利用配置对径流中氮流失的影响 Authors:Luo, Yi-Feng (1); Chen, Fang-Xin (1); Zhou, Hao (1); Long, Yi (2); Yan, Dong-Chun (2); Tan, Wen-Hao (1); Li, Dan-Dan (1); Chen, Xiao-Yan (1) Author affiliation:(1) College of Resource and Environment, Southwest University, Chongqing; 400715, China; (2) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, Chengdu; 610041, China Corresponding author:Chen, Xiao-Yan(c400716@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2260-2267 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To understand the effect of nitrogen from runoff during rainfall events for different land uses, sub-catchments A and B in the small Shipanqiu watershed in Zhong County, Chongqing-which were managed using different land use practices-were taken as research objects. Runoff flow and nitrogen levels at the outlet of the catchment were monitored. Sub-catchment A is an agroforestry-water complex and sub-catchment B is the site of traditional agriculture. EMC was used to evaluate the average concentration of runoff nitrogen during rainfall events, and the effect of this runoff nitrogen on the small watershed with different land use systems was analyzed. The results showed that the TN concentration in catchment B (1.37-15.17 mg•L-1)>catchment A (0.84-9.28 mg•L-1); the ratio of the first peak to the second peak in catchment A was 62%, which was far less than the 97% in catchment B; the average DN/TN values were 69% and 75% in catchments A and B, respectively; and the average NN/DN values were 67% and 80% in catchments A and B, respectively. The different land use practices have significant impacts on nitrogen loss. Compared with the catchment where traditional agricultural practices were followed, the agroforestry-water complex catchment effectively reduced the loss of nitrogen and decreased the first TN peak value and DN/TN and NN/DN values. This study provides a scientific basis for the prevention and control of non-point source pollution in small watersheds in the area of the Three Gorges Reservoir.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Runoff Controlled terms:Agricultural robots - Agriculture - Catchments - Land use - Nitrogen - Pollution control - Rain - Reservoirs (water) - Water pollution - Watersheds Uncontrolled terms:Agricultural practices - Average concentration - Land-use systems - Non-point source pollution - Prevention and controls - Scientific basis - Small watersheds - Three gorges reservoir Classification code:403 Urban and Regional Planning and Development - 441.2 Reservoirs - 443.3 Precipitation - 444.1 Surface Water - 453 Water Pollution - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Mass_Density 1.37e-03kg/m3 to 1.52e-02kg/m3, Mass_Density 8.40e-04kg/m3 to 9.28e-03kg/m3, Percentage 6.20e+01%, Percentage 6.70e+01%, Percentage 6.90e+01%, Percentage 7.50e+01%, Percentage 8.00e+01%, Percentage 9.70e+01% DOI:10.13227/j.hjkx.202009177 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126251 Title:Effect of the Combined Use of Denitrifying Bacteria, Calcium Nitrate, and Zirconium-Modified Zeolite on the Mobilization of Nitrogen and Phosphorus in Sediments and Evaluation of Its Nitrate-Nitrogen Releasing Risk Title of translation:反硝化细菌, 硝酸钙和锆改性沸石联用对底泥中氮磷迁移转化的影响及硝态氮释放风险评估 Authors:Xin, Hui-Min (1); Lin, Jian-Wei (1); Zhan, Yan-Hui (1) Author affiliation:(1) College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai; 201306, China Corresponding author:Lin, Jian-Wei(jwlin@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1847-1860 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this work, the influence of an integrated method based on calcium nitrate, denitrifying bacteria, and zirconium-modified zeolite (CN+DB+ZZ) on the transport and transformation of nitrogen (N) and phosphorus (P) in sediments was investigated, and the risk of nitrate release from the calcium nitrate-injected sediment was evaluated. The effects of the single calcium nitrate injection (CN), calcium nitrate, and denitrifying bacteria combined treatment (CN+DB) and the combined treatment using calcium nitrate injection and zirconium-modified zeolite capping (CN+ZZ) on the mobilization of N and P in sediment were compared, and the nitrate releasing risk of these methods was also evaluated. The results indicated that although CN treatment could effectively control the P release from the sediment, this method could not effectively control the release of ammonium-nitrogen from sediment and has a high risk of releasing nitrate-nitrogen. The CN+DB combined method not only could effectively control the liberation of sedimentary P but also reduce the risk of nitrate-nitrogen release from the calcium nitrate-injected sediment compared with the single CN method. However, the CN+DB combined method could not effectively control the release of ammonium-nitrogen from the sediment. The CN+ZZ combined treatment not only could effectively prevent the release of sedimentary P but could also greatly reduce the release of ammonium-nitrogen from the sediment. However, the CN+ZZ combined method could result in a substantial release of nitrate-nitrogen from the calcium nitrate-injected sediment. The CN+DB+ZZ combined technology could effectively control the release of P from sediment as well as greatly reduce the risk of ammonium-nitrogen release from the sediment. Furthermore, the CN+DB+ZZ combined method resulted in a significant reduction of nitrate-nitrogen released from the calcium nitrate-injected sediment compared with the CN and CN+ZZ treatment methods. The prevention of the dissolution of the P-bound iron oxide/hydroxide in the sediment, the reduction of redox-sensitive P in sediment, and the improvement of the phosphate and ammonium adsorption abilities of sediment by the CN+DB+ZZ combined method is critical to control the release of phosphorus and ammonium-nitrogen from sediment using this method. Results of this study reveal that the CN+DB+ZZ combined technology could be a promising method for the control of phosphorus and ammonium-nitrogen release from sediments.
© 2021, Science Press. All right reserved. Number of references:47 Main heading:Calcium compounds Controlled terms:Bacteria - Denitrification - Iron oxides - Nitrates - Sedimentology - Sediments - Zeolites - Zirconium Uncontrolled terms:Ammonium adsorption - Calcium nitrate injections - Combined technology - Combined treatment - Denitrifying bacteria - Integrated method - Nitrogen and phosphorus - Transport and transformation Classification code:481.1 Geology - 483 Soil Mechanics and Foundations - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202008175 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003396 Title:Human Health Risk Assessment of Phenol in Poyang Lake Basin Title of translation:鄱阳湖流域水体和水产品中苯酚的暴露特征及人体健康风险评估 Authors:Xu, Qian-Yun (1, 2); S.-H., Ai; X.-Y., Gao; X.-N., Wang; Z.-T., Liu; S.-Q., Zhao; G., Ge; J., Li Author affiliation:(1) School of Life Sciences, Nanchang University, Nanchang; 330031, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding authors:Ge, Gang(gge@ncu.edu.cn); Li, Ji(liji@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1354-1360 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Phenol is widely used in the production of insulation and thermal insulation materials, adhesives, perfumes, coatings for food containers, paints, and pharmaceutical production, and is also widely detected in the aquatic environment. Long-term exposure to phenol can elicit adverse effects, such as skin burn, liver and central system damage. Here, phenol concentrations in the water and aquatic products of Poyang Lake were investigated. Human health risks from phenol to adults and adolescents were also assessed based on local population exposure parameters. The exposure concentration range of phenol in the studied water and aquatic products was not detected (ND)-556.26 ng•L-1 and 11.98-255.51 μg•kg-1, respectively. Human health risk based on drinking water in different areas ranged from 3.80×10-7-8.46×10-5. Higher human health risks from drinking water was detected in the southern area of Poyang Lake and at the confluence of the Yangtze River to the north. Health risks caused by different types of aquatic products ranges 2.65×10-5-1.47×10-4. In particular, human health risks from the consumption of yellow catfish and catfish are an order of magnitude higher than for other aquatic products. Probabilistic risk assessment was also conducted through Monte Carlo simulation to analyze the health risk to the population in the Poyang Lake Basin and assess its sensitivity of different exposure parameters. The 95th percentile health risk of drinking water and aquatic product consumption in the Poyang Lake Basin was calculated as being acceptable. Overall, the concentrations of phenol had the greatest impact on the calculated health risk values. This study provides valuable information for phenol risk management in the Poyang Lake basin.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Health risks Controlled terms:Adhesives - Health - Lakes - Monte Carlo methods - Odors - Phenols - Potable water - Risk assessment - Risk management - Rivers - Thermal insulation Uncontrolled terms:Aquatic environments - Exposure concentration - Exposure parameters - Human health risk assessment - Pharmaceutical production - Phenol concentration - Probabilistic Risk Assessment - Thermal insulation materials Classification code:413.2 Heat Insulating Materials - 444 Water Resources - 461.6 Medicine and Pharmacology - 461.7 Health Care - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202007254 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003449 Title:Effects of Chromium Pollution on Soil Bacterial Community Structure and Assembly Processes Title of translation:铬污染对土壤细菌群落结构及其构建机制的影响 Authors:Yu, Hao (1, 2); An, Yi-Jun (1, 2); Jin, De-Cai (2); Jin, Tuo (3); Wang, Xing-Run (4) Author affiliation:(1) College of Environmental Science and Engineering, Liaoning Technical University, Fuxin; 123000, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing; 100125, China; (4) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Jin, De-Cai(dcjin@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1197-1204 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the rapid development of industry, chromium (Cr) has become one of the main soil heavy metal pollutants in China, seriously affecting the soil ecological environment and health of residents. In this study, contaminated soil samples were taken around the tannery sludge yard area in Heibei Province. The Illumina MiSeq high-throughput sequencing technology was employed to analyze the structure and assembly processes of soil bacterial communities at different pollution levels. Results showed that chromium pollution significantly influences soil properties and soil bacterial communities. The composition and structure of bacterial communities were significantly shifted at different pollution levels. Furthermore, the α diversity of bacterial communities may decrease with relatively high concentrations of chromium. Bacterial communities in chromium polluted soil can be divided into 55 phyla, where Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, and Firmicutes are the dominant phyla (relative abundance>5%). Moreover, the soil bacterial communities were dominated by the deterministic assembly process (homogeneous selection) and the stochastic ratios decreased with increases in the concentration of chromium in soil. The total concentration of chromium, soil moisture, pH, and organic matter were significantly correlated (P<0.05) with the bacterial communities. Therefore, these soil properties might be the driving factors affecting the structure of bacterial communities.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Soil pollution Controlled terms:Assembly - Bacteria - Chromium - Heavy metals - Soil moisture - Stochastic systems Uncontrolled terms:Bacterial community - Chromium pollutions - Contaminated soils - Ecological environments - High-throughput sequencing - Relative abundance - Soil bacterial community - Soil heavy metals Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 543.1 Chromium and Alloys - 961 Systems Science DOI:10.13227/j.hjkx.202010209 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710248375 Title:Analysis of the Performance and Mechanism of Phosphorus Removal in Water by Steel Slag Title of translation:钢渣对水体中磷的去除性能及机制解析 Authors:Luo, Xiao (1); Zhang, Jun-Bo (2); He, Lei (3); Yang, Xue-Jing (1); Lü, Peng-Yi (1) Author affiliation:(1) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China; (2) School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China; (3) China Nuclear Power Engineering Co., Ltd., Hebei Branch, Shijiazhuang; 050000, China Corresponding author:Lü, Peng-Yi(lvpeng.yi@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2324-2333 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In view of the significant differences in phosphorus removal processes by different steel slags, electric furnace slag was taken as the research object to discuss the effects of environmental factors, including the adsorption time and adsorption temperature, on phosphorus removal and to verify the phosphorus removal performances of steel slag for phosphate, pyrophosphate, and actual water bodies. With the help of spectral techniques including scanning electron microscopy(SEM), energy dispersive X-ray spectroscopy(EDS), X-ray fluorescence spectroscopy(XRF), and an X-ray diffractometer(XRD), the phosphorus removal mechanisms of steel slag were explored. Moreover, the phosphorus removal abilities of different absorptive media of steel slag, ceramsite, and zeolite were compared, and the safety performances of phosphorus removal by steel slag were evaluated. The results showed that the adsorption time significantly affected the phosphorus removal efficiency of steel slag. The phosphorus removal efficiencies of phosphate solutions with a concentration range of 1-20 mg•L-1 using steel slag could reach over 97% when the adsorption time was 30 min. The effect of temperature on phosphorus removal by steel slag was not significant. The pyrophosphate adsorption capacity of steel slag was weaker than that of orthophosphate, and the removal rate of pyrophosphate with an initial concentration of 3 mg•L-1 was 82.45%. Spectral analysis showed that the mechanisms of phosphorus removal by steel slag were chemical adsorption assisted by physical adsorption, and calcium-phosphorus was the main precipitate component. CaHPO4•2H2O was the main precipitate. Steel slag exhibited excellent phosphorus removal properties for removing phosphorus in the biological pond effluent and wetland system, achieving total phosphorus removal rates of 98.36% and 93.33%, respectively. In comparison, the phosphate removal performance of steel slag was better than that of ceramsite and zeolite, and the removal efficiencies of PO43- were 96%, 40%, and 10%, respectively. The contents of heavy metals in the leaching solution of steel slag met the requirements of the Class I standard of surface water; thus, the steel slag was safe and reliable.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Biological water treatment Controlled terms:Adsorption - Chemical analysis - Effluents - Electric furnaces - Energy dispersive spectroscopy - Fluorescence spectroscopy - Heavy metals - Scanning electron microscopy - Slags - Spectrum analysis - Surface waters - Zeolites Uncontrolled terms:Adsorption capacities - Adsorption temperature - Effect of temperature - Energy dispersive X ray spectroscopy - Environmental factors - Initial concentration - X ray diffractometers - X-ray fluorescence spectroscopy Classification code:444.1 Surface Water - 445.1 Water Treatment Techniques - 452.3 Industrial Wastes - 531 Metallurgy and Metallography - 741.3 Optical Devices and Systems - 802.3 Chemical Operations - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 1.00e-03kg/m3 to 2.00e-02kg/m3, Mass_Density 3.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+01%, Percentage 4.00e+01%, Percentage 8.25e+01%, Percentage 9.33e+01%, Percentage 9.60e+01%, Percentage 9.70e+01%, Percentage 9.84e+01%, Time 1.80e+03s DOI:10.13227/j.hjkx.202008031 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804533 Title:Effect of Phytoplankton Community Composition and Size Structure on Light Absorption Properties Title of translation:浮游植物群落及粒径结构对光吸收特性的影响 Authors:Huang, Xin (1, 2); Shi, Kun (2); Zhang, Yun-Lin (2); Zhu, Guang-Wei (2); Zhou, Yong-Qiang (2) Author affiliation:(1) Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Shi, Kun(kshi@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:808-818 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In the fields of phytoplankton ecology, water optics, and water color remote sensing, phytoplankton absorption properties represent the light absorption capacity of phytoplankton, which affects photosynthesis efficiency and carbon fixation. Here, the biomass, community composition, and the absorption properties of phytoplankton were measured alongside other bio-optical parameters in Lake Tianmu are examined using data collected between January and November 2013 (except February). Based on the relationships between phytoplankton biomass, community composition, and absorption, the effects of abundance, biomass, and equivalent sphere diameter on phytoplankton absorption and specific absorption were revealed. The highest biomass and abundance of phytoplankton were recorded in the autumn and the lowest in the winter. Cryptomonas, Synedra, and Cyclotella were the dominant genera throughout the year. The dominant genera structure type was Bacillariophyta-Cryptophyta in the winter and spring, Bacillariophyta-Chlorophyta-Pyrroptata in the summer, and Cryptophyta-Bacillariophyta-Chlorophyta in the autumn. Phytoplankton diameter was ranked in the order summer>autumn>winter>spring, with mean values of 64.83 μm in summer and 29.54 μm in spring. Phytoplankton absorption coefficients of were ranked in the order autumn>spring>winter>summer, with mean values at 440 nm and 675 nm of (0.66±0.18) m-1 and (0.33±0.10) m-1 in autumn and (0.17±0.02) m-1 and (0.08±0.01) m-1 in summer, respectively. The specific absorption coefficients of the phytoplankton were ranked in the order spring>winter>autumn>summer, with mean values at 440 nm and 675 nm of (0.07±0.02) m2•mg-1 and (0.04±0.01) m2•mg-1 in spring and (0.03±0.004) m2•mg-1 and (0.01±0.002) m2•mg-1 in summer, respectively. Significant linear correlations were found between phytoplankton biomass, abundance, and absorption coefficients. Variations of Bacillariophyta and Cyanophyta biomass caused by temperature explained the seasonal variation in absorption coefficients. The specific absorption coefficient decreased with an increase in equivalent sphere diameter, and variations in phytoplankton community composition explained seasonal changes in the specific absorption coefficient.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Water absorption Controlled terms:Biomass - Light - Light absorption - Phytoplankton - Remote sensing - Springs (components) - Structure (composition) Uncontrolled terms:Absorption capacity - Absorption co-efficient - Absorption property - Community composition - Phytoplankton absorptions - Phytoplankton biomass - Phytoplankton community - Specific absorption coefficients Classification code:471 Marine Science and Oceanography - 601.2 Machine Components - 741.1 Light/Optics - 802.3 Chemical Operations - 951 Materials Science Numerical data indexing:Size 2.95e-05m, Size 4.40e-07m, Size 6.48e-05m, Size 6.75e-07m DOI:10.13227/j.hjkx.202007316 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582265 Title:Different Responses of Soil Dissolved Organic Matter to Different Types of Compost Title of translation:土壤中溶解性有机质对不同类型堆肥的响应差异 Authors:Xi, Bei-Dou (1, 2); Wang, Yan (1, 3); Tan, Wen-Bing (1, 2); Yu, Hong (1, 2); Cui, Dong-Yu (1, 2); Cheng, Dong-Hui (3); Dang, Qiu-Ling (1, 2) Author affiliation:(1) State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) State Environment Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) School of Water and Environment, Chang'an University, Xi'an; 710054, China Corresponding author:Dang, Qiu-Ling(dangling819@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3565-3576 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study explored the responses of soil dissolved organic matter (DOM) to the application of different types of compost using a soil sample without compost as a control. Ultraviolet and fluorescence spectrum technology and EEM-PARAFAC was used to analyze DOM structure and driving factors in soil added with different proportion of cow dung compost (SCC), food and kitchen waste compost (SFC), and sludge compost (SCC). Compared with the control group, contents of AN, NH4+-N, DOC, and SOM in soil added with compost were significantly increased, and contents of SOM and DOC increased with the increasing of compost amount. When added compost in the same proportion, contents of AN, NO3--N, and DOC in SCC and SFC were significantly higher than those in SSC, while contents of NH4+-N and SOM were higher in SSC. The results of spectral analysis showed that the structure of conjugated benzene ring, hydrophobic component, quinone group, and chromogenic component in DOM of soil added with compost were significantly increased, the transition of unsaturated organic molecule (π〖FY1〗π*) was more active, the molecular weight of DOM increased, and the degree of humification was enhanced. When the amount of compost added is 5%, the influence of food and kitchen waste compost on DOM structure was greatest among three types of compost. At 10% and 20%, sludge compost had the greatest impact on DOM structure. The results of EEM-PARAFAC analysis showed that the relative content of fulvic acid-like substances with low molecular in DOM of soil added with compost was increased, while the relative content of proteoid-like substances decreased. 2D-COS analysis showed that compost affected the change order of fluorescence components in DOM. SCC and SFC were as follows: proteoid-like>fulvic acid-like>humus-like; in SSC, it was fulvic acid-like>proteoid-like>humus-like. The enhance of humification and the decrease of relative content of protein-like substances in DOM were related to increased DOC and AN, the relative content of humus-like in low molecular weight was positively correlated with the content of NO3--N, and the relative content of macromolecule fulvic acid-like was increased due to the input of SOM from compost.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Composting Controlled terms:Biodegradation - Biogeochemistry - Fluorescence - Molecular weight - Organic acids - Quinone - Soils - Spectrum analysis Uncontrolled terms:Cow dung composts - Different proportions - Dissolved organic matters - Fluorescence components - Fluorescence spectra - Hydrophobic components - Low molecular weight - Organic molecules Classification code:461.8 Biotechnology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 741.1 Light/Optics - 804.1 Organic Compounds - 931.3 Atomic and Molecular Physics Numerical data indexing:Percentage 1.00e+01%, Percentage 2.00e+01%, Percentage 5.00e+00% DOI:10.13227/j.hjkx.202010037 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126259 Title:Pollution Characteristics and Health Risk Assessment of Heavy Metals in the Water of Lijiang River Basin Title of translation:漓江流域水体中重金属污染特征及健康风险评价 Authors:Huang, Hong-Wei (1); Xiao, He (1, 2); Wang, Dun-Qiu (1); Xi, Bei-Dou (1, 3); Sun, Xiao-Jie (1); Li, Jie-Yue (1, 2); Li, Xiang-Kui (1) Author affiliation:(1) College of Environment Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin; 541004, China; (3) State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Li, Jie-Yue(yueli90@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1714-1723 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to clarify the pollution levels of heavy metals in the drinking water sources of the Lijiang River Basin, surface water samples were collected from 62 sites throughout the Lijiang River during May 2019. Heavy metals, including As, Cd, Cr, Mn, Cu, Zn, Hg, Co, and Sb, in the water samples were analysed. Health risk assessments associated with these nine heavy metals were conducted using the health risk assessment model from the US EPA. The results indicated that the order of the average concentrations of heavy metals in the water samples were Mn>Zn>As>Cr>Cu>Sb>Co>Cd>Hg. No heavy metals exceeded the limit values of the drinking water health standards in China (GB 5749-2006), and the concentrations were lower than the limitations of Grade Ⅰ level in the environmental quality standards for surface water (GB 3838-2002). According to the spatial distribution, the high contents areas of As, Cr, Zn, and Sb were predominantly distributed downstream of the Lijiang River, while the high contents areas of Cd, Cu, Hg, Co, and Mn were mostly distributed in the upper reaches. Multivariate analysis indicated that Cd, Mn, Cu, and Co were primarily from agricultural production; Cr, Zn, and Sb were mainly from tourism transportation; As was predominantly from the weathering of rock parent material and soil erosion; Hg was mainly from the improper disposal of domestic garbage and atmospheric deposition. The results of the health risk assessment indicated that children were more susceptible to the threat of heavy metal pollution than adults, and the average annual risk of carcinogenic heavy metals to human health through drinking water ingestion were higher than those of non-carcinogenic metals. The maximum personal average annual health risk of Cr was higher than the maximum allowance levels recommended by the International Commission on Radiological Protection (5×10-5 a-1). The average annual risk of non-carcinogenic heavy metals (10-14-10-9 a-1) decreased in the order of Co>Cu>Hg>Zn>Sb>Mn, which were far below the maximum allowance levels recommended by the ICRP.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:River pollution Controlled terms:Agricultural robots - Agriculture - Environmental Protection Agency - Health - Health risks - Heavy metals - Manganese removal (water treatment) - Materials handling - Meteorological problems - Multivariant analysis - Potable water - Risk assessment - Rivers - Tourism - Watersheds - Weathering Uncontrolled terms:Agricultural productions - Atmospheric depositions - Average concentration - Drinking water sources - Environmental quality standards - Heavy metal pollution - International commission on radiological protections - Multi variate analysis Classification code:443.1 Atmospheric Properties - 444 Water Resources - 444.1 Surface Water - 445.1 Water Treatment Techniques - 453 Water Pollution - 454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 461.7 Health Care - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention - 922 Statistical Methods DOI:10.13227/j.hjkx.202008068 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126253 Title:Characteristics of Volatile Organic Compounds Pollution and Risk Assessment of Nansi Lake in Huaihe River Basin Title of translation:淮河流域南四湖可挥发性有机物污染特征及风险评价 Authors:Cheng, Yun-Xuan (1, 2); Gao, Qiu-Sheng (1, 2); Li, Jie (1, 2); Li, Hui (1, 2); Wu, Peng (1, 2); Jiao, Li-Xin (1, 2) Author affiliation:(1) National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Jiao, Li-Xin(jiaolx@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1820-1829 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study aimed to investigate the pollution characteristics of the volatile organic compounds in Nansi Lake and evaluate the ecological and health risks. In November 2017, water samples collected from 25 sampling points in Nansi Lake using the purge and trap technique and GC-MS detected 52 types of VOCs. The detection rate of ethylbenzene, m-/p-xylene, o-xylene, 1, 2-dichlorobenzene, and naphthalene reached 100%, and cis-1, 3-dichloropropene and toluene reached 96%. The detection rate of 1, 2, 4-trimethyl benzene was the lowest, at only 12%, the average concentration of 1, 2-dichlorobenzene was the highest, reaching 3.49 μg•L-1, and 1, 2, 4-trimethyl benzene was only 0.02 μg•L-1. The concentration of 1, 2-dichlorobenzene in Nansi Lake was generally higher than that of other VOCs. Meanwhile, the concentrations of m-/p-xylene and ethylbenzene at point NSH-24 far exceeded the other VOCs, but the median value of all VOCs did not exceed 4 μg•L-1. The spatial distribution of the VOCs concentrations in Nansi Lake presented high values in the northwest and southeast, and low in the middle. The leading cause of VOCs pollution in Nansi Lake may be the exhaust gas emitted by shipping vessels during navigation, and the secondary cause is the collection of VOCs in the upstream and downstream tributaries and the influence of human factors. The health risk assessment of Nansi Lake found that, overall, there was no carcinogenic or non-carcinogenic health risk, but the risk value of individual points was relatively high, even exceeding the risk threshold set by the US EPA. There were 12 points in Nansi Lake where the ecological risk quotient exceeded 1, indicating an ecological risk to aquatic organisms.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:River pollution Controlled terms:Aquatic organisms - Benzene - Ethylbenzene - Health - Health risks - Lake pollution - Lakes - Naphthalene - Risk assessment - Rivers - Volatile organic compounds Uncontrolled terms:1 ,2-dichlorobenzene - Average concentration - Detection rates - Ecological risks - Huaihe river basins - Purge and trap - Risk threshold - Sampling points Classification code:453 Water Pollution - 461.6 Medicine and Pharmacology - 461.7 Health Care - 471 Marine Science and Oceanography - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 2.00e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 3.49e-06kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e-06kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Percentage 1.20e+01%, Percentage 9.60e+01% DOI:10.13227/j.hjkx.202009030 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126213 Title:Characteristics of Sludge and Associated Risk Assessment of Urban Sewage Treatment Plants Title of translation:城镇污水处理厂污泥泥质监测及资源化风险评价 Authors:Li, Juan (1); Li, Jin-Xiang (1); Yang, Yan-Yan (1) Author affiliation:(1) Beijing Municipal Ecological and Environmental Monitoring Center, Beijing; 100048, China Corresponding author:Li, Jin-Xiang(jinxiangli@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1956-1966 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In urban solid waste management, the scientific and reasonable disposal and utilization of sewage sludge is becoming more and more important. It can be said that the pollution status and chemical properties of sewage sludge in urban sewage treatment plants can provide a basis for the scientific disposal and utilization of sludge. In this study, the characteristics of pH, moisture content, Cd, Cr, Cu, Zn, Pb, As, Hg, Ni, mineral oil, volatile phenol, PAHs, organic matter, nitrogen, phosphorus, and potassium were evaluated in sewage sludge collected from 49 sewage treatment plants in a certain city. The pollution status of heavy metals and organic pollutants, the frequency distribution of pollutant concentrations, and changes in the nutrient content were analyzed. The Nemero index and Hakanson potential ecological hazard index were used to assess the potential ecological risks of heavy metals in the agricultural utilization process of sludge. The results showed that under the condition of neutral pH values and high moisture content, the order of heavy metal content was Zn>Cu>Cr>Pb>Ni>As>Hg>Cd. The principal component analysis (PCA) results indicated that Cd, Pb, Hg, Ni, and As constituted the main load factors of the first main component of heavy metal sources. The most concentrated contents of 8 heavy metal frequency distributions among the 49 samples were 38.9-1380.0, 62.6-182.7, 63.6-181.3, 0.0-97.8, 19.3-68.4, 0.8-29.2, 0.3-8.7, and 0.01-0.96 mg•kg-1. In addition, the most concentrated frequency distribution of mineral oil, volatile phenol, and PAH concentration were 87.0%, 87.9%, and 77.6%, respectively. Moreover, the nutrient content of sludge was higher than the average level in China, and the organic matter content was 67.4%, 75.9%, and 92.5% of that of pig manure, cow dung, and chicken manure, while the content of nitrogen, phosphorus, and potassium was not very different. The Nemero index and Hakanson ecological hazard index results showed that the sludge of urban sewage treatment plant in the city has certain ecological risks. However, four sewage treatment plants were heavily polluted or highly ecologically hazardous among the 44 plants in this study, which were in line with the Standards for pollutant control of agricultural sludge. In summary, there are certain potential ecological risks for the agricultural utilization of sludge in the city, and it is necessary to reduce the heavy metal content before resourcing. More importantly, on the premise that the sludge meets the agricultural standards, a comprehensive ecological risk assessment is required to select a reasonable sludge recycling method.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Sewage treatment plants Controlled terms:Agricultural robots - Agriculture - Biogeochemistry - Fertilizers - Hazards - Heavy metals - Mammals - Manures - Mineral oils - Moisture - Moisture determination - Nitrogen - Nutrients - Organic pollutants - Phenols - Phosphorus - Polycyclic aromatic hydrocarbons - Potassium - Risk assessment - Sewage sludge - Sludge disposal Uncontrolled terms:Ecological risk assessment - Frequency distributions - High moisture contents - Organic matter content - Pollutant concentration - Potential ecological hazards - Potential ecological risk - Urban sewage treatment Classification code:452.2 Sewage Treatment - 481.2 Geochemistry - 513.3 Petroleum Products - 531 Metallurgy and Metallography - 549.1 Alkali Metals - 804 Chemical Products Generally - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes - 914.1 Accidents and Accident Prevention - 944.2 Moisture Measurements Numerical data indexing:Percentage 6.74e+01%, Percentage 7.59e+01%, Percentage 7.76e+01%, Percentage 8.70e+01%, Percentage 8.79e+01%, Percentage 9.25e+01% DOI:10.13227/j.hjkx.202005332 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126234 Title:Determination Method and Characteristics of Particle Size Multiplier of PM2.5 in Road Dust Title of translation:道路扬尘中PM2.5粒度乘数的测定方法及特征 Authors:Li, Dong (1); Chen, Jian-Hua (1); Zhang, Yue-Fan (1); Gao, Zhong-Yang (2); Gao, Jian (1); Zhang, Kai (1); Zhu, Shuang (1) Author affiliation:(1) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) Second Research Institute of the China Aerospace Science and Industry Group, Beijing; 100854, China Corresponding author:Chen, Jian-Hua(chenjh@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1642-1648 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The particle size multiplier is a valuable parameter for depicting the particle size distribution characteristics of road dust and calculating road dust emissions. In order to realize the localization of the particle size multiplier, the AP-42 and TRAKER methods were used for sampling on typical and different types of roads in Baoding in March 2019. Then, the particle size multiplier of road dust PM2.5 (K2.5) was calculated using the correction formula, and the characteristics were analyzed. The results indicated: ① The K2.5 obtained separately by AP-42 and TRAKER were 0.21 g•VKT-1 and 0.23 g•VKT-1 on average, which correlated well, with a high correlation coefficient of 0.6. The PM2.5 emission factors calculated using the K2.5 of the different methods were almost at the same value, indicating that TRAKER method based on a laser sensor could measure and calculate the K2.5 and could be directly used to obtain the particle size multiplier or be converted using the fitting equation. ② The characteristics of the K2.5 in Baoding were ranked as: Expressway<Secondary roads<Branch roads<Major Roads. ③ Further study results of K2.5 characteristics demonstrated that the average K2.5 was higher than 0.15 g•VKT-1 (the value recommended by US EPA) in Baoding City, which would cause an underestimate of road dust emissions and increase the uncertainty of the emissions inventory if the recommended value from the EPA were adopted. The K2.5 in Baoding City is relatively high, indicating that the road dust contains a significant number of micro particles, increasing the contribution of road dust to urban atmospheric PM2.5.
© 2021, Science Press. All right reserved. Number of references:25 Main heading:Particle size Controlled terms:Dust - Particle size analysis - Roads and streets Uncontrolled terms:Correction formulas - Correlation coefficient - Determination methods - Emission factors - Emissions inventory - Fitting equations - Recommended values - Road dust emissions Classification code:406.2 Roads and Streets - 451.1 Air Pollution Sources - 951 Materials Science DOI:10.13227/j.hjkx.202009051 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710248376 Title:Construction and Application Optimization of the Chl-a Forecast Model ARIMA for Lake Taihu Title of translation:太湖水体Chl-a预测模型ARIMA的构建及应用优化 Authors:Li, Na (1, 2); Li, Yong (1, 2); Feng, Jia-Cheng (2); Shan, Ya-Jie (2); Qian, Jia-Ning (2) Author affiliation:(1) Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China; (2) College of Environment, Hohai University, Nanjing; 210098, China Corresponding author:Li, Yong(liyonghh@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2223-2231 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As an important indicator of phytoplankton biomass in lakes, the chlorophyll-a (Chl-a) concentration reflects the abundance and variation of phytoplankton in the water. Based on the monthly monitoring data of Chl-a and environmental factors in Lake Taihu from December 1999 to August 2019, key environmental factors related to Chl-a and their relationships were found using the principal component analysis (PCA) method. A multiple linear stepwise regression model and an auto-regressive integrated moving average (ARIMA) model were developed to predict the monthly Chl-a concentrations. The results showed that the Chl-a concentrations in Lake Taihu exhibited clear seasonal change characteristics and an overall trend of a gradual increase. The changes in total phosphorus (TP), the permanganate index, monthly average temperature (MAT), and monthly rainfall (MR) matched the Chl-a concentrations relatively well, whereas the changes in total nitrogen (TN) and ammonium nitrogen (NH4+-N) lagged significantly. The PCA results showed that the increased phytoplankton biomass and consequent algae outbreaks in Lake Taihu were not limited to the effect of a single factor such as TN or TP, but were comprehensively affected by multiple factors such as TN, NH4+-N, TP, the permanganate index, MR, and MAT. Through further validation, the ARIMA model of Chl-a concentrations was proved to be significantly better than the multiple linear stepwise regression model, especially when considering the key environmental factors as independent variables and optimizing their values. The established ARIMA (0,1,1) (0,1,1) model would be helpful for forecasting algae blooms in Lake Taihu and provide useful suggestions for water environmental management, such as water resources dispatch and regulation.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Autoregressive moving average model Controlled terms:Environmental management - Environmental regulations - Forecasting - Lakes - Phytoplankton - Regression analysis Uncontrolled terms:Ammonium nitrogen - Auto regressive integrated moving average models - Environmental factors - Independent variables - Monthly rainfalls - Phytoplankton biomass - Seasonal changes - Stepwise regression Classification code:454.2 Environmental Impact and Protection - 471 Marine Science and Oceanography - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202009210 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247459 Title:Changes in the Bacterioplankton Community Between "Ice" and "Water" in the Frozen Dali Lake Title of translation:冰封状态下达里湖冰-水中浮游细菌群落结构差异 Authors:Li, Wen-Bao (1); Yang, Xu (1); Tian, Ya-Nan (1); Du, Lei (1) Author affiliation:(1) Inner Mongolia Key Laboratory of Water Resources Protection and Utilization, Inner Mongolia Agricultural University, Hohhot; 010018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2276-2286 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Bacteria are the key components of water ecosystems, and play important roles in material and energy cycle processes. To understand the changes in the bacterioplankton community in frozen lakes, we collected 15 "bottom ice" samples and 15 "surface water" samples under the ice sheet from Dali Lake, which is an inland closed lake in the Inner Mongolia Plateau. Combined with comparisons of the physicochemical proxies between "bottom ice" and "surface water" samples, the phylum community characteristics of the bacterioplankton were analyzed in detail. Although the bacterioplankton were mainly comprised of Proteobacteria, Actinobacteria, Cyanobacteria, Bacteroidetes, and 11 other phyla in the "bottom ice" and "surface water", the average relative abundances of the dominant planktonic bacteria were clearly different. For example, the average relative abundance of Proteobacteria was approximately 63.64% in the "bottom ice" samples, but decreased to approximately 26.75% in the surface water samples, which was visibly smaller than the relative abundance of Actinobacteria with an average value of approximately 39.10%. We concluded that the changes in the contents of nutrient elements and physicochemical proxies must be the primary factors influencing the changes in the bacterioplankton community in the frozen Dali Lake. The changes in the physicochemical proxies could have been responsible for the changes in the bacteria community in the "bottom ice" and "surface water". Otherwise, the different physiological characteristics of the planktonic bacteria phyla caused the different responses to the changes in the contents of the nutrient elements and physicochemical proxies in the frozen lake. For example, the major bacterioplankton phyla were mainly influenced by the changes in total phosphorus and dissolved total phosphorus in the "bottom ice" and by the changes in dissolved inorganic phosphorus and ammonia nitrogen in the "surface water". The results will provide basic data to analyze the lake ecological environment in Northern China.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Ice Controlled terms:Ammonia - Bacteria - Ecology - Hydrogeology - Lakes - Nutrients - Phosphorus - Physiological models Uncontrolled terms:Bacteria community - Bacterioplanktons - Dissolved inorganic phosphorus - Ecological environments - Nutrient elements - Physiological characteristics - Planktonic bacteria - Relative abundance Classification code:454.3 Ecology and Ecosystems - 481.1 Geology - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.68e+01%, Percentage 3.91e+01%, Percentage 6.36e+01% DOI:10.13227/j.hjkx.202009218 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126221 Title:Effects of Chlorine Dioxide Disinfection on the Profile of the Super Antibiotic Resistance Genes in a Wastewater Treatment Plant Title of translation:ClO2消毒工艺对污水处理厂出水超级耐药基因的影响 Authors:Cheng, Chun-Yan (1); Li, Hai-Bei (1); Liang, Yong-Bing (1); Shi, Dan-Yang (1); Chen, Zheng-Shan (1); Yang, Dong (1); Jiao, Qiao-Rui (1); Shao, Yi-Fan (1); Li, Jun-Wen (1); Jin, Min (1) Author affiliation:(1) Tianjin Key Laboratory of Risk Assessment and Control for Environment & Food Safety, Tianjin Institute of Environmental Medicine and Operational Medicine, Tianjin; 300050, China Corresponding author:Jin, Min(jinminzh@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1939-1945 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to study the effects of chlorine dioxide (ClO2) disinfection on the super antibiotic resistance genes (SARGs), the final effluents before and after chlorine dioxide were sampled throughout one year in a wastewater treatment plant (WWTP). The bacteria and extracellular nucleic acid were collected using microporous membrane filtration and nucleic acid adsorption particles, respectively. A total of 9 SARGs was detected through a quantitative real-time polymerase chain reaction (qPCR). The results revealed that both intracellular and extracellular NDM-1, MCR-1, and MEC-A could be positively detected in the samples. Overall, ClO2 disinfection enhanced the relative abundance of the iSARGs (P<0.05), exhibiting a seasonal pattern, and increasing in the spring, summer, and autumn. In spring, it improved the most, up to twice the abundance. No SARGs were detected positive in the winter, either intracellularly or extracellularly. There was no significant variation in the concentrations of eSARGs before and after ClO2 disinfection. Therefore, ClO2 disinfection cannot effectively remove iSARGs and eSARGs in the final effluent from the WWTP.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Wastewater treatment Controlled terms:Antibiotics - Chemicals removal (water treatment) - Chlorine compounds - Disinfection - Effluents - Genes - Microfiltration - Polymerase chain reaction - Sewage pumping plants - Sewage treatment plants - Springs (components) - Water treatment plants Uncontrolled terms:Antibiotic resistance genes - Chlorine dioxides - Final effluents - Micro porous membranes - Quantitative real-time polymerase chain reaction - Relative abundance - Seasonal patterns - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 601.2 Machine Components - 801.2 Biochemistry - 802.3 Chemical Operations DOI:10.13227/j.hjkx.202008182 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247532 Title:Changes in Water Chemistry and Driving Factors in the Middle and Lower Reaches of the Beijing-Hangzhou Grand Canal Title of translation:京杭大运河中下游段天然水化学变化特征及驱动因素 Authors:Cheng, Zhong-Hua (1); Deng, Yi-Xiang (2); Zhuo, Xiao-Ke (1); Dai, Dan (2); Yu, Tao (1) Author affiliation:(1) College of Environmental Science and Technology, Yangzhou University, Yangzhou; 225127, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Yu, Tao(yutao0325@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2251-2259 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To reveal the Beijing-Hangzhou Grand Canal natural water chemistry characteristics and the influence of human activities, river samples from Xuzhou to Jiaxing were collected in 2019-2020. Simultaneously, the water chemistry data of the canal from 1959 to 1962 and 1975 to 1977 in the Suzhou, Wuxi, and Changzhou sections and the recent social and economic data of the major cities along the canal were collected and analyzed. The results showed that the type of hydrochemistry in the study area was mainly influenced by the weathering of carbonate rocks in the basin, but K++Na+ accounted for 40.39% of the cation equivalent concentration, which was higher than that in ordinary surface water, thereby indicating that the natural hydrochemistry of the canal had been significantly affected by human factors. Spatially, the major ion mass concentrations, total hardness, and total alkalinity of the Grand Canal from Xuzhou station to the downstream area tended to decrease overall, but the parameters at Wuxi and Suzhou stations increased significantly. It was found that Na+ and SO42- were increased by approximately 16 and 12 times and total dissolved solids was increased by nearly 3 times by analyzing the 60 years of water chemistry of the Suzhou, Wuxi, and Changzhou sections. The current (Ca2++Mg2+)/HCO3- ratio in the Suzhou, Wuxi, and Changzhou sections is generally greater than 1, which is significantly higher than that from 1959 to 1962, thereby reflecting the results of human activities. According to the analysis of the social and economic development of the Grand Canal, this change was the result of the accelerated weathering of carbonate rocks in the basin caused by the sulfur oxides discharged by human activities. Further statistical analysis showed that urban domestic sewage and industrial wastewater discharge were the main driving factors causing chemical salinization of natural water in the Grand Canal. This study can provide a scientific basis for coordinating urban development and protecting the water ecological environment of the Grand Canal Basin.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Chemical analysis Controlled terms:Alkalinity - Carbonates - Hydraulic structures - Hydrochemistry - Sedimentary rocks - Sewage - Surface waters - Urban growth - Weathering Uncontrolled terms:Accelerated weathering - Beijing-Hangzhou grand canals - Ecological environments - Equivalent concentrations - Industrial wastewater discharges - Social and economic development - Total alkalinities - Total dissolved solids Classification code:403.1 Urban Planning and Development - 444.1 Surface Water - 452.1 Sewage - 481.2 Geochemistry - 482.2 Minerals - 801.1 Chemistry, General - 804.2 Inorganic Compounds Numerical data indexing:Age 6.00e+01yr, Percentage 4.04e+01% DOI:10.13227/j.hjkx.202009018 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804554 Title:Distribution Characteristics of Microplastics in Ice Sheets and Its Response to Salinity and Chlorophyll a in the Lake Wuliangsuhai Title of translation:乌梁素海冰盖中微塑料的分布特征及其与盐度,叶绿素a的响应关系 Authors:Wang, Zhi-Chao (1); Yang, Jian-Lin (1); Yang, Fan (1); Yang, Wen-Huan (1); Li, Wei-Ping (1); Li, Xing (2) Author affiliation:(1) School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou; 014010, China; (2) Inner Mongolia Water Saving Agricultural Engineering Research Center, Inner Mongolia Normal University, Hohhot; 010022, China Corresponding author:Li, Wei-Ping(sjlwp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:673-680 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:There are sparse reports on the distribution of microplastics in the ice sheets of freshwater lakes. In this study, the abundance, color, shape, and species of microplastics in the ice sheet of Lake Wuliangsuhai were characterized using field sampling and microscope observations. Fourier-transform infrared spectroscopy (FTIR) and correlation analysis were used to examine the distribution of microplastics contained in the lake and its relationships with salinity and chlorophyll a. The results show that the average abundance of microplastics in the Lake Wuliangsuhai ice sheet is 56.75-141 n•L-1, which is approximately 10-100 times higher than in the surface water of the Lake Wuliangsuhai. Fibers were the most common type of microplastics followed by fragments. Overall abundance showed a decreasing trend in the downstream horizontal direction and was positively correlated with salinity in the vertical direction. The abundance of microplastic in the surface ice and bottom ice was greater than in the middle of the ice and near bottom of the ice. There was no correlation between the abundance of microplastic and the concentration of chlorophyll a. In addition, due to the capturing effect of the ice, microplastic particles are temporarily stored in the ice sheet in winter, which are released into water in spring. This study provides baseline information to inform microplastic pollution control measures in Lake Wuliangsuhai.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Ice Controlled terms:Chlorophyll - Fourier transform infrared spectroscopy - Glaciers - Lakes - Microplastic - Pollution control - River pollution Uncontrolled terms:Chlorophyll a - Correlation analysis - Distribution characteristics - Field sampling - Fresh water lakes - Microplastic particles - Microplastics - Vertical direction Classification code:453 Water Pollution - 801 Chemistry - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202007042 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582345 Title:Distribution Characteristics and Influencing Factors of Phytoplankton Community in Harbin Urban River Network During Wet Season Title of translation:哈尔滨城市河网丰水期浮游植物群落分布特征及驱动因子 Authors:Lu, Feng (1); Li, Lei (1); Qi, Qing-Song (1); Lu, Xin-Xin (1); Liu, Yan (1); Fan, Yan-Wen (1) Author affiliation:(1) Key Laboratory of Biodiversity of Aquatic Organisms, College of Life Science and Technology, Harbin Normal University, Harbin; 150025, China Corresponding authors:Liu, Yan(yanliuhrb@hotmail.com); Fan, Yan-Wen(fanyaw@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3253-3262 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, 23 typical sampling points were selected from the Harbin urban river network during the wet season from June to August in 2019, including the Harbin section of the Songhua, Hejiagou, Majiagou, and Ashi rivers to study the distribution of phytoplankton communities. Characteristics and driving factors influencing the water environment were determined, and a total of 174 taxa of phytoplankton were identified. During the wet period from June to August, the composition of the phytoplankton community in the urban river network of Harbin was dominated by Diatom and Chlorophyta, which gradually shifted toward Diatom and Cyanophyta. The dominant species mainly include:Cyclotella meneghiniana Kützing, Nitzschia palea (Kützing) W.Smith, Synedra ulna (Nitzsch) Ehrenberg, Ankistrodesmus angustus Bernard, Pseudanabaena limnetica (Lemmermann) Komárek, and Cryptomonas ovata Ehrenberg. One-way crossed similarity analysis (One-way crossed ANOSIM) revealed significant differences in phytoplankton composition among different sections of the river during the study period (P<0.05). The Harbin section of the Songhua River was richer in phytoplankton than other sections. Redundancy analysis (RDA) shows that TP and pH are the main environmental factors that cause differences in the structure of the phytoplankton community in each section of the Harbin urban river network. This research aims to enrich the research on the ecological evaluation of urban river network by studying the phytoplankton community and environmental relevance of Harbin urban river network and provide a theoretical basis for future urban river network ecological monitoring, management, and restoration.
© 2021, Science Press. All right reserved. Number of references:58 Main heading:Rivers Controlled terms:Ecosystems - Phytoplankton Uncontrolled terms:Distribution characteristics - Ecological evaluation - Ecological monitoring - Environmental factors - Phytoplankton community - Phytoplankton composition - Redundancy analysis (RDA) - Similarity analysis Classification code:454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography DOI:10.13227/j.hjkx.202011158 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582421 Title:Impacts of Meteorology and Emission Variations on PM2.5 Concentration Throughout the Country During the 2020 Epidemic Period Title of translation:新冠肺炎疫情期间气象条件和排放变化对PM2.5的影响 Authors:Lu, Shi-Ze (1); Shi, Xu-Rong (2); Xue, Wen-Bo (2, 3); Lei, Yu (2); Yan, Gang (2) Author affiliation:(1) School of Environment, Tsinghua University, Beijing; 100084, China; (2) Center of Air Modeling and Systems Analysis, Chinese Academy for Environmental Planning, Beijing; 100012, China; (3) State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation, Chinese Academy of Environmental Planning, Beijing; 100012, China Corresponding author:Xue, Wen-Bo(xuewb@caep.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3099-3106 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study analyzed the impacts of meteorological conditions and changes in air pollutant emissions on PM2.5 across the country during the first quarter of 2020 based on the WRF-CMAQ model. Results showed that the variations in meteorological conditions led to a national PM2.5 concentration decreased of 1.7% from 2020-01 to 2020-03, whereas it increased by 1.6% in January and decreased by 1.3% and 7.9% in February and March, respectively. The reduction of pollutants emissions led to a decrease of 14.1% in national PM2.5 concentration during the first quarter of 2020 and a decrease of 4.0%, 25.7%, and 15.0% in January, February, and March, respectively. Compared to the same period last year, the PM2.5 concentration measured in Wuhan City decreased more than in the entire country. This was caused by improved meteorological conditions and a higher reduction of pollutant emissions in Wuhan City. PM2.5 in Beijing increased annually before the epidemic outbreak and during the strict control period, mainly due to unfavorable meteorological conditions. However, the decrease in PM2.5 in Beijing compared to March 2019 was closely related to the substantial reduction of emissions. The measured PM2.5 in the "2+26" cities, the Fenwei Plain and the Yangtze River Delta (YRD) decreased during the first quarter of 2020, with the largest drop occurring in the Yangtze River Delta due to higher YRD emissions reductions. The meteorological conditions of "2+26" cities and Fenwei Plain were unfavorable before the epidemic outbreak and greatly improved during the strict control period, whereas the Yangtze River Delta had the most favorable meteorological conditions in March. The decrease in PM2.5 concentration caused by the reduction of pollutant emissions in the three key areas was highest during the strict control period.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Air pollution Controlled terms:Disease control - Rivers Uncontrolled terms:Air pollutant emission - Emissions reduction - Meteorological condition - PM2.5 concentration - Pollutant emission - Pollutants emissions - Substantial reduction - Yangtze river delta Classification code:451 Air Pollution Numerical data indexing:Percentage 1.30e+00%, Percentage 1.41e+01%, Percentage 1.50e+01%, Percentage 1.60e+00%, Percentage 1.70e+00%, Percentage 2.57e+01%, Percentage 4.00e+00%, Percentage 7.90e+00% DOI:10.13227/j.hjkx.202011016 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582348 Title:Screening and Evaluation of Methods for Determining Available Lead (Pb) and Cadmium (Cd) in Farmland Soil Title of translation:农地土壤重金属Pb和Cd有效性测定方法的筛选与评价 Authors:Chen, Ying (1, 2); Liu, Han-Yi (1, 2); Liu, Na (1, 2); Jiang, Zhen-Mao (1, 2); Wei, Shi-Qiang (1, 2) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China Corresponding author:Wei, Shi-Qiang(sqwei@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3494-3506 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The accumulation of heavy metals in crops is largely dependent on the availability of heavy metals in soils. Due to the differences of soil types and pollution characteristics, there is no widely recognized method for the determination of the bio-available heavy metals in soils such as Pb and Cd. In order to screen and establish suitable methods, the extractable abilities of five extractants (CaCl2, NH4OAc, HCl, EDTA, and DTPA) and Gradient Diffusion Film Technology (DGT) on four typical farmland soils with very different properties in Chongqing (acid purple soil, neutral purple soil, calcareous yellow soil and calcareous purple soil) were systematically compared. Simultaneously, pot experiments were carried out with Lolium perenne L. as an indicator plant to explore the relationship between the extractable soil Pb and Cd and their accumulation in plants. The feasibility of the tested methods were evaluated based on the extractability and co-relationships. The results showed that the extractability of the tested extractants for soil Pb and Cd varied a lot. HCl showed highest extractability on Pb in acid purple soil and calcareous yellow soil, while EDTA did the best in neutral purple soil and calcareous purple soil; HCl showed best extractability in all soils except calcareous purple soil, where EDTA was the best. Considering the correlation between the extraction amount and uptake by plant, all the extraction methods could be applied for the evaluation of the bioavailability of soils Pb and Cd except CaCl2 for Pb due to its weak extractability for Pb for a specific soil type. For the comparison of heavy bioavailability in different soil types, EDTA-extractable Pb and DGT-extractable Cd were recommended due to their well co-relationships between extractable amount in soil and uptake by plant (Lolium perenne L.) as indicated by the correlation coefficients of 0.941 and 0.919, respectively. HCl was relatively suitable as Cd extractant compared to others if DGT method could not be used.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Soil pollution Controlled terms:Biochemistry - Cadmium - Chlorine compounds - Ethylenediaminetetraacetic acid - Extraction - Farms - Lead - Plants (botany) - Soils Uncontrolled terms:Co-relationships - Correlation coefficient - Evaluation of methods - Extractable soils - Extraction method - Film technology - Heavy metals in soil - Indicator plants Classification code:483.1 Soils and Soil Mechanics - 546.1 Lead and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202012011 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804548 Title:Remediation Effect of Compound Modifier FZB on Arsenic and Cadmium Contaminated Soil Title of translation:复合改良剂FZB对砷镉污染土壤的修复效果 Authors:Ding, Ping (1, 2); He, Yu-Long (1, 2); He, Huan (1, 2); Yu, Jiang (1, 2, 3) Author affiliation:(1) College of Architecture and Environment, Sichuan University, Chengdu; 610065, China; (2) Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu; 610065, China; (3) Yibin Institute of Industrial Technology, Sichuan University, Yibin; 644000, China Corresponding author:Yu, Jiang(yuj@scu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:917-924 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A pot-based planting experiment of Chinese brassica was carried out to study the influence of the compound modifier FZB (iron sulfate+zeolite+modified biochar) on the physical and chemical properties of soil, As and Cd bioavailability and morphology, and the ability of Chinese brassica to accumulate As and Cd at different dosages. The results showed that, after application of FZB, the pH, OM, and CEC contents of the rhizosphere soil tended to increase in As and Cd compound contaminated farmland soils. The concentrations of available As and available Cd in the soil gradually reduced with an increase in FZB application, with maximum reductions of 65.99% and 30.68%, respectively. The application of FZB significantly changed the morphology of heavy metals in the soil, which consequently decreased the exchangeable concentrations of As and Cd, while the concentrations of aluminum-bound As, iron-bound As, organic bound Cd, and residual Cd increased. At the same time, the application of FZB effectively reduced the concentrations of As and Cd in the roots and aerial parts of Chinese brassica. When 8 g•kg-1of FZB was applied, compared with the control group, the concentrations of As and Cd in the aerial parts of Chinese brassica were reduced by 42.09% and 31.34%, respectively. FZB application decreased the As and Cd bioaccumulation capacity of the roots and aerial parts, and decreased the capacity of the plant to translocate As from the roots to the aerial parts. The study shows that the composite modifier FZB has good application prospects for reducing the bioavailability of As and Cd in farmland soils.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Soil pollution Controlled terms:Antennas - Arsenic compounds - Biochemistry - Cadmium compounds - Farms - Heavy metals - Iron compounds - Morphology - Remediation - Soils - Sulfur compounds - Zeolites Uncontrolled terms:Application prospect - Contaminated soils - Control groups - Farmland soils - Iron sulfates - Physical and chemical properties - Planting experiments - Rhizosphere soils Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801.2 Biochemistry - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 951 Materials Science Numerical data indexing:Percentage 3.07e+01%, Percentage 3.13e+01%, Percentage 4.21e+01%, Percentage 6.60e+01% DOI:10.13227/j.hjkx.202007240 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688844 Title:Effect of Filter Medium on the Enhancement of Complete Autotrophic Nitrogen Removal over Nitrite Process in a Tidal Flow Constructed Wetland Title of translation:填料对潮汐流人工湿地中CANON作用强化的影响 Authors:Liu, Bing (1, 2); Zheng, Yu-Ming (2); Qin, Hui-An (1); Gu, Li (3) Author affiliation:(1) School of Chemistry and Chemical Engineering, Zhengzhou Normal University, Zhengzhou; 450044, China; (2) Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (3) College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing; 400044, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:283-292 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study attempted to shorten the time wasted at the startup of a complete autotrophic nitrogen removal over nitrite (CANON) process in a tidal flow constructed wetland (TFCW) to achieve higher nitrogen removal rates. Thus, the starting performance and the related microbiological characteristics of different kinds of filter media filling the TFCW were explored at an appropriate drainage rate. The results showed that the physicochemical properties of the filter medium could significantly affect the quantity and activity of the functional microbes (especially ANAMMOX bacteria) enriched in the TFCWs, leading to fluctuations of the starting time and nitrogen transformation rates of the systems filled with five different kinds of filter media. Compared with that of gravel, the quantity and activity of ANAMMOX bacteria in the bed could be enhanced to different degrees as the TFCW was filled with ceramsite, zeolite, broken bricks, and lobster shells. Correspondingly, the starting times of the TFCWs with the CANON process were shortened, and their nitrogen removal performances could also be optimized. When the hydraulic loading rate of the TFCW was 0.96 m3•(m2•d)-1, the initiation of the CANON process could be accomplished successfully in the system filled with lobster shells within 300 cycles, since AOB and ANAMMOX bacteria could become dominant quickly in the packing bed. Moreover, the TN and NH4+-N removal rates could reach up to (88.37±1.19)% and (91.03±0.66)%, respectively, followed by those of broken bricks, zeolite, ceramsite, and gravel.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Nitrogen removal Controlled terms:Bacteria - Brick - Filters (for fluids) - Gravel - Physicochemical properties - Shellfish - Wastewater treatment - Wetlands - Zeolites Uncontrolled terms:Autotrophic nitrogen removal - Hydraulic loading rates - Microbiological characteristics - Nitrogen removal rates - Nitrogen transformations - Removal performance - Starting performance - Tidal flow constructed wetlands Classification code:414.2 Brick Materials - 452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202005029 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779701 Title:Effects of Different Soil Conditioners on Rice Growth and Heavy Metal Uptake in Soil Contaminated with Copper and Cadmium Title of translation:不同结构改良剂对铜镉污染土壤水稻生长和重金属吸收的影响 Authors:Wei, Wei (1, 2); Li, Ping (1, 2); Lang, Man (1, 2) Author affiliation:(1) Jiangsu Key Laboratory of Agriculture Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Li, Ping(pli@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4462-4470 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A rice pot experiment was conducted to study the effects of four soil conditioners, namely polyacrylic acid (PAA), polyacrylamide (PAM), polyvinyl alcohol (PVA), and humic acid (HA), on rice growth and heavy metal uptake from paddy soil contaminated with copper and cadmium. The results showed that the height and straw weight of rice in the conditioned soil treatments increased by 7.34%-22.0% and 10.0%-32.2%, respectively, compared to the control treatment. The increased height and straw weight was generally proportional to the amount of soil conditioners used in each treatment. Application of 0.4% soil conditioners led to a slight reduction in rice yield, with the grain weight decreasing by 6.70%-32.6% relative to the control treatment. Soil conditioners had no effect on soil pH, but significantly reduced the concentration of soil available Cu (5.38%-39.7%) and Cd (6.98%-59.6%). Similarly, concentrations of Cu in rice root, straw, and grain were decreased by 0.88%-27.2%, 8.50%-45.2%, and 3.41%-31.2%, respectively, while concentrations of Cd were decreased by 5.93%-20.5%, 10.0%-51.4%, and 3.12%-50.7%, respectively. The largest and smallest decreases occurred in the PAA and PVA treatments, respectively. Application of PAA, PAM, and HA significantly decreased the translocation factor of Cu from root to straw by 11.2%-27.1%, whereas the translocation factor of Cu from straw to grain increased by 17.9%-33.6%, respectively, compared with the control treatment. Application of PAA, PAM, and HA significantly decreased the translocation factor of Cd from root to straw by 15.2%-38.5%, compared with the control treatment, but with the exception of HA, had no effect on Cd translocation from straw to grain. In general, the application of soil conditioners promoted rice growth, inhibited the uptake of Cu and Cd by rice, and had a certain remediation effect on heavy metal contaminated soil.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Soil conditioners Controlled terms:Cadmium - Copper - Grain (agricultural product) - Organic acids - Remediation - Soil pollution - Soils Uncontrolled terms:Control treatments - Effect on soils - Heavy metal contaminated soils - Heavy metal uptake - Poly (vinyl alcohol) (PVA) - Polyacrylamide(PAM) - Polyacrylic acids - Translocation factor Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 544.1 Copper - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.1 Organic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 1.00e+01% to 3.22e+01%, Percentage 1.12e+01% to 2.71e+01%, Percentage 1.52e+01% to 3.85e+01%, Percentage 1.79e+01% to 3.36e+01%, Percentage 3.12e+00% to 5.07e+01%, Percentage 3.41e+00% to 3.12e+01%, Percentage 4.00e-01%, Percentage 5.38e+00% to 3.97e+01%, Percentage 5.93e+00% to 2.05e+01%, Percentage 6.70e+00% to 3.26e+01%, Percentage 6.98e+00% to 5.96e+01%, Percentage 7.34e+00% to 2.20e+01%, Percentage 8.80e-01% to 2.72e+01% DOI:10.13227/j.hjkx.202101263 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582317 Title:Environmental Background Values of Heavy Metals and Physicochemical Properties in Different Soils in Shenzhen Title of translation:深圳市不同土类的重金属环境背景值与理化性质特征 Authors:Lin, Ting (1); Zhao, Shu-Hua (1); Xi, Xiu-Ping (1); Yang, Kun (1); Wu, Jing-Ya (1); Zhu, Yan (1); Luo, Fei (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Drinking Water Source Management and Technology, Shenzhen Academy of Environmental Science, Shenzhen; 518001, China Corresponding author:Luo, Fei(luofei2006@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3518-3526 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Research on the characteristics of environmental background values of soil can provide a scientific basis for setting regional standards for soils. To determine the characteristics of environmental background values and main influencing factors of heavy metals (Cr, Cu, Zn, Ni, Pb, Co, V, Cd, and Hg) in soils in Shenzhen, 500 topsoil samples (0-20 cm) were collected by decision unit multi increment sampling (DUMS) from 500 soil background sites in the whole city, including 405 latosolic red soil, 77 red soil, and 18 yellow soil samples. The results show that the concentrations of heavy metals in red soil are relatively low in general, and those of Cr, Ni, Co, and V in latosolic red soil and Cu, Zn, Hg, Pb, and Cd in yellow soil are higher. Compared with the environmental background values of soil in the Seventh Five-year Plan of China in 1980s, the concentrations of Cr, Cu, Zn, Ni, Co, and V in latosolic red soil, red soil, and yellow soil are lower, the concentrations of Cd and Hg are similar, and the concentration of Pb is higher. The spatial distribution patterns of the nine heavy metals are significantly different. Pb, Zn, and Co present an obvious zonal distribution pattern, while Cr, Cu, Ni, V, Cd, and Hg present a point-like distribution pattern. Moreover, the correlation analysis between heavy metal content and physicochemical properties of different soils showed that the correlation between heavy metal content and physicochemical properties of latosolic red soil was the most significant. Stepwise regression analysis was used to elucidate the relationship between heavy metal content in latosolic red soil, and physicochemical properties were quantified. The physicochemical properties affecting heavy metal content in latosolic red soil were found to be mechanical composition, pH, organic matter, and cation exchange capacity.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Soils Controlled terms:Heavy metals - Physicochemical properties - Pollution Uncontrolled terms:Background value - Cation exchange capacities - Correlation analysis - Distribution patterns - Heavy metal contents - Mechanical compositions - Spatial distribution patterns - Stepwise regression analysis Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography Numerical data indexing:Size 0.00e+00m to 2.00e-01m DOI:10.13227/j.hjkx.202011082 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126243 Title:Analysis of Performance and Microbial Diversity of ANAMMOX Sludge Based on Particle Size Differentiation Title of translation:基于粒径分化的厌氧氨氧化污泥性能与微生物多样性分析 Authors:Wang, Xiao-Tong (1); Yang, Hong (1) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing; 100124, China Corresponding author:Yang, Hong(yhong@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1930-1938 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Abstract: In order to clarify the characteristics of anaerobic ammonia oxidizing (ANAMMOX) sludge and the succession rule of bacteria based on particle size differentiation, the performance change and microbial community structure of ANAMMOX floc sludge during the formation of particles in the reaction system of a high ammonia-nitrogen biofilter were studied. The results indicated that the specific activity (SAA) and tolerance of the ANAMMOX granular sludge (AnGS) were significantly improved by increasing the particle size, and the SAA of R4(>4.75 mm) was up to 426.8 mg•(g•d)-1, but it also had adverse effects on mass transfer. The results of the high-throughput sequencing showed that dynamic changes between bacterial genera were common. When the particle size was less than 4.75 mm, the increase in particle size strengthened the stability of the bacterial flora, the ammonia oxidizing bacteria (AOB) with more flocs were eliminated, and the nitrogen removal ratio gradually stabilized. R3 (2.8-4.75 mm) exhibited the most specific flora composition, and the functional bacteria Candidatus Kuenenia accounted for 52.7%, while the R4 community complexity increased. Furthermore, the proportion of functional bacteria decreased, and the abundance of heterotrophic bacteria increased, which negatively affected the particle structure. In addition, the R3 microorganism has the best gene function expression level, which is significantly better than small particles in gene replication repair and energy conversion. Finally, the evolution of AnGS was analyzed through the OTU matrix between the samples. These results have some guiding significance for the optimization of the AnGS system and will be helpful for the application of the ANAMMOX process.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Particle size analysis Controlled terms:Ammonia - Bacteria - Energy conversion - Genes - Mass transfer - Nitrogen removal - Particle size - Wastewater treatment Uncontrolled terms:Ammonia oxidizing bacteria - Flora compositions - Functional bacteria - Guiding significances - Heterotrophic bacterias - High-throughput sequencing - Microbial community structures - Microbial diversity Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 525.5 Energy Conversion Issues - 641.3 Mass Transfer - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 5.27e+01%, Size 2.80e-03m to 4.75e-03m, Size 4.75e-03m DOI:10.13227/j.hjkx.202009248 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688807 Title:Effects of Film Materials on Ammonia Volatilization Emissions from a Paddy System After Reducing Nitrogen Fertilizer Application Title of translation:氮肥减投条件下膜材料使用对稻田氨挥发排放的影响 Authors:Yu, Ying-Liang (1); Wang, Meng-Fan (1); Yang, Bei (1); He, Shi-Ying (1); Duan, Jing-Jing (1); Yang, Lin-Zhang (1); Xue, Li-Hong (1) Author affiliation:(1) Key Laboratory of Agricultural Environment of the Lower Reaches of the Yangtze River, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing; 210014, China Corresponding author:Xue, Li-Hong(njxuelihong@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:477-484 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ammonia volatilization emissions constitute the main pathway of nitrogen loss from paddy systems. Present control technologies are based on reducing the amount of nitrogen fertilizer applied. However, ratio of nitrogen loss through ammonia volatilization emissions has not changed, and it has become a bottleneck for promoting nitrogen use efficiency. Therefore, in order to study the effects of film materials on ammonia volatilization emissions, a two-year field plot experiment was carried out with agricultural waste powder and amphipathic molecule materials spread on surface water after nitrogen fertilizer application in paddy system. The results showed that film materials could reduce nitrogen loss through ammonia volatilization by 19%-31% in the paddy season, and this part of nitrogen was accumulated in soil or assimilated by paddy tissue. The ammonium concentration and pH in the surface water and film materials were the major control factors of ammonia volatilization emissions with nitrogen fertilizer application. Moreover, further reductions in ammonia volatilization emissions could be achieved by film materials after reducing nitrogen fertilizer application. Differences in the effect mechanisms of the film materials provide flexible options for practical agricultural production to meet demands.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Nitrogen fertilizers Controlled terms:Agricultural robots - Agricultural wastes - Agriculture - Ammonia - Entertainment industry - Surface waters Uncontrolled terms:Agricultural productions - Ammonia volatilization - Ammonium concentrations - Amphipathic molecules - Control technologies - Effect mechanism - Fertilizer applications - Nitrogen-use efficiency Classification code:444.1 Surface Water - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes Numerical data indexing:Percentage 1.90e+01% to 3.10e+01% DOI:10.13227/j.hjkx.202006095 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126245 Title:Temporal Trend of Polycyclic Aromatic Hydrocarbons in Atmosphere Within 24 Hours After Snowfall Title of translation:降雪后24 h内大气中多环芳烃的变化规律 Authors:Fan, Hui-Ze (1); Zhu, Fu-Jie (1); Hu, Peng-Tuan (1); Ma, Wan-Li (1) Author affiliation:(1) International Joint Research Centre for Persistent Toxic Substances, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China Corresponding author:Ma, Wan-Li(mawanli002@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1636-1641 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The atmosphere is a significant medium for the transportation and diffusion of volatile and semi-volatile pollutants. Furthermore, the atmosphere is the primary exposure route for pollutants to enter the human body. Therefore, the study of the environmental fate of pollutants in the atmosphere is essential. In this study, 16 polycyclic aromatic hydrocarbons (PAHs) were analyzed in snow samples and air samples within 24 hours after a snowfall, and the temporal trend of PAHs in the atmosphere was comprehensively studied. The results indicated that the detection rate of the 16 PAHs in snow was 100%, and the concentration of phenanthrene (538.3 ng•L-1) was the highest, followed by naphthalene (509.1 ng•L-1) and fluoranthene (429.9 ng•L-1), indicating that snowfall can remove PAHs from the atmosphere. After the snowfall, a falling-rising-falling temporal trend of the concentrations of PAHs in the atmosphere was observed. Higher concentrations appeared during rush hour, with the largest automobile exhaust emissions, while lower concentrations appeared during periods with the lowest human activity. The results indicated that the atmospheric concentrations of PAHs were predominantly influenced by human activities. Within 24 hours after snowfall, the ratio of PAHs between the gas phase and particle phase, which depends primarily on the physical and chemical properties of PAHs, had not changed substantially. The diagnostic ratios indicated that within 24 hours after snowfall, the PAHs in the atmosphere originated mostly from the emissions of solid fuel and liquid fuel combustion.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Polycyclic aromatic hydrocarbons Controlled terms:Air quality - Fuels - Mineral oils - Naphthalene - Snow Uncontrolled terms:Atmospheric concentration - Automobile exhaust emissions - Diagnostic ratios - Environmental fate - Liquid fuel combustion - Physical and chemical properties - Polycyclic aromatic hydrocarbons (PAHS) - Volatile pollutants Classification code:443.3 Precipitation - 451.2 Air Pollution Control - 513.3 Petroleum Products - 804.1 Organic Compounds Numerical data indexing:Mass_Density 4.30e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 5.09e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 5.38e-07kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Time 8.64e+04s DOI:10.13227/j.hjkx.202008047 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126227 Title:Effects of PES and 2, 4-DCP on the Extracellular Polymeric Substances and Microbial Community of Anaerobic Granular Sludge Title of translation:微塑料PES与2, 4-DCP复合污染对厌氧污泥胞外聚合物与微生物群落的影响 Authors:Lin, Xu-Meng (1, 2); Su, Cheng-Yuan (1, 2); Wu, Shu-Min (2); Huang, Xian (2); Deng, Xue (2); Lin, Xiang-Feng (2); Huang, Zun (2); Wei, Jia-Lin (2) Author affiliation:(1) Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guangxi Normal University, Guilin; 541004, China; (2) School of Environment and Resources, Guangxi Normal University, Guilin; 541004, China Corresponding author:Su, Cheng-Yuan(suchengyuan2008@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1946-1955 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effects of polyether sulfone (PES) microplastics and 2, 4-dichlorophenol (2, 4-DCP) on the loosely-bound extracellular polymeric substances (LB-EPS) and tightly-bound EPS (TB-EPS) of anaerobic granular sludge were investigated. In addition, high-throughput sequencing technology was used to analyze the changes in the microbial community and gene functions in the anaerobic granular sludge. The results revealed that the chemical oxygen demand (COD) removal rates of the 2, 4-DCP and PES+2, 4-DCP experimental groups were 35% and 37%, which were 57% and 55% lower than that of the blank control group, while the COD removal rates of the PES experimental group remained around 90%. After the addition of the PES microplastics and 2, 4-DCP, the protein and polysaccharide contents in the LB-EPS decreased compared with the control group, and the polysaccharide content in TB-EPS increased the least. In presence of the PES microplastics and 2, 4-DCP, the activity of coenzyme F420 was inhibited. Through high-throughput sequencing, the microbial richness and diversity of the anaerobic granular sludge in the experimental group were reduced with the addition of the PES microplastics or 2, 4-DCP. In the control group and the experimental group, the dominant bacteria at the phylum level were Proteobacteria (13.45%-44.47%), Firmicutes (6.86%-21.67%), and Actinobacteria (3.16%-18.11%). The abundance of β-Proteobacteria in the PES+2, 4-DCP experimental group was reduced by 15.28%, while the abundance of γ-Proteobacteria increased by 28.44% compared with the control group. Based on the phylogenetic investigation of the communities using the reconstruction of unobserved states (PICRUSt) analysis, it was found that in the experimental group with the PES microplastics or 2, 4-DCP, the genes related to the sludge energy metabolism function were 0.25%-0.72% more than the control group; therefore, the abundance of genes related to the transport function group decreased significantly.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Chemical oxygen demand Controlled terms:Genes - Granular materials - Metabolism - Microorganisms - Microplastic - Polymers Uncontrolled terms:2 ,4 dichlorophenol(2 ,4 dcp) - Anaerobic granular sludge - Blank control group - Chemical oxygen demand removals - Extra-cellular polymeric substances - High-throughput sequencing - Microbial communities - Polysaccharide contents Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 815.1 Polymeric Materials - 951 Materials Science Numerical data indexing:Percentage 1.34e+01% to 4.45e+01%, Percentage 1.53e+01%, Percentage 2.50e-01% to 7.20e-01%, Percentage 2.84e+01%, Percentage 3.16e+00% to 1.81e+01%, Percentage 3.50e+01%, Percentage 3.70e+01%, Percentage 5.50e+01%, Percentage 5.70e+01%, Percentage 6.86e+00% to 2.17e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202006030 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003256 Title:Levels and Risk Assessment of Short and Medium-Chain Chlorinated Paraffins in Soil from Paper Mill Area Title of translation:造纸厂土壤中短链和中链氯化石蜡的污染特征和风险评估 Authors:Zhang, Pei-Xuan (1, 2); Gao, Li-Rong (2); Song, Shi-Jie (1); Qiao, Lin (2); Xu, Chi (2); Huang, Di (2); Wang, Shuang (2); Jiang, Si-Jing (2, 3); Zheng, Ming-Hui (2, 3) Author affiliation:(1) College of Geology and Environment, Xi'an University of Science and Technology, Xi'an; 710054, China; (2) State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Institute of Environment and Health, Jianghan University, Wuhan; 430056, China Corresponding author:Gao, Li-Rong(gaolr@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1131-1140 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Short-chain chlorinated paraffins are persistent organic pollutants, and chlorinated paraffins were widely used as sizing agent in the paper industry. In order to investigate the levels and risk assessment of short-chain and medium-chain chlorinated paraffins in the paper mill plant, the surface soil and soil of different depths were collected.The concentrations, congener group profiles of short-chain chlorinated paraffins (SCCPs) and medium-chain chlorinated paraffins (MCCPs) in soil were determined by two-dimensional gas chromatography coupled with electron capture-negative ion mass spectrometry. The SCCPs and MCCPs concentrations were 42-3 853 ng•g-1 and 34-2 091 ng•g-1. The chlorine contents were 59.9%-61.9% and 48.7%-52.8%. The concentrations of SCCPs and MCCPs were different in the soil collected in different sampling site. The concentration of SCCPs and MCCPs were relatively higher in soil of sewage treatment area and coating area. The CP levels in soil from the paper mill plant were at a high level compared with those in other regions. C10Cl6-7 and C14-15Cl5 were the main congener groups in most soil samples. The results of principal component analysis showed that the CP52 commercial products may be sources of SCCPs and MCCPs in the soil. The risk quotient (RQ) for SCCPs and MCCPs were assessed in soil of paper mill plant. The results showed that the RQ values for SCCPs in soil ranged from 0.01 to 0.73 which are the medium risk, and the RQ values for MCCPs in soil ranged from 0 to 0.07, which are the low risk. The human exposure values of children and adults are lower than TDI [10 μg•(kg•d)-1 ] in both cases. The health risks caused by non-dietary exposure under paper mill area are low.
© 2021, Science Press. All right reserved. Number of references:53 Main heading:Soil surveys Controlled terms:Gas chromatography - Health risks - Mass spectrometry - Negative ions - Organic pollutants - Paper and pulp industry - Paper and pulp mills - Papermaking machinery - Paraffins - Risk assessment - Sewage treatment - Soils - Two dimensional electron gas Uncontrolled terms:Chlorinated paraffins - Commercial products - Dietary exposure - Electron capture negative ion mass spectrometries - Medium-chain chlorinated paraffins - Persistent organic pollutant (POP) - Short-chain chlorinated paraffins - Two dimensional gas chromatography Classification code:452.2 Sewage Treatment - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 811.1 Pulp and Paper - 811.1.2 Papermaking Equipment - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 4.87e+01% to 5.28e+01%, Percentage 5.99e+01% to 6.19e+01% DOI:10.13227/j.hjkx.202011004 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804545 Title:Influence of Burning Fireworks on the Atmosphere During the Spring Festival in Guangzhou in 2020 Title of translation:广州市2020年春节期间烟花爆竹燃放对空气质量的影响 Authors:Pei, Cheng-Lei (1); Wang, Yu-Jun (1); Bi, Yan-Ru (2); Lian, Xiu-Feng (3, 4); Zhou, Qian-Ni (3, 4); Wang, Zai-Hua (5); Ma, Li (6); Li, Mei (3, 4) Author affiliation:(1) Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province, Guangzhou; 510060, China; (2) Guangzhou Hexin Instrument Co., Ltd., Guangzhou; 510530, China; (3) Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution, Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou; 510632, China; (4) Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Guangzhou; 510632, China; (5) Guangdong Institute of Resources Comprehensive Utilization, Guangdong Academy of Sciences, Guangzhou; 510650, China; (6) College of Chemistry and Environmental Engineering, Baise University, Baise; 533000, China Corresponding author:Li, Mei(limei2007@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:546-555 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Twenty-one air quality monitoring stations including four with single particle aerosol mass spectrometers (SPAMS) were used to observe air quality and aerosol particulates during the 2020 Spring Festival (from January 21 to 28) in Guangzhou. The effect of burning fireworks on the atmosphere of Guangzhou and its eleven administrative regions was examined, and the chemical composition of firework particles was detected and analyzed by single particle aerosol mass spectrometry. The results show that the burning of fireworks had a significant impact on air quality in the discharge area and the prohibited discharge area. The concentrations of PM2.5, PM10, and SO2 sharply increased in Guangzhou on New Year's Eve. Air quality in Zengcheng District, Baiyun District, Huangpu District, and some areas of Tianhe District was also affected by the concentrated burning of fireworks on January 25 between 01:00 and 06:00. A method of fireworks tracing based on SPAMS using Al+ as a tracer was established with a time resolution of 5 min. The main particle types emitted by the burning fireworks were levoglucan, potassium-rich, and mineral. These particles were well mixed with nitrate, but this was not conducive to the formation of ammonium.
© 2021, Science Press. All right reserved. Number of references:25 Main heading:Explosives Controlled terms:Aerosols - Air quality - Chemical analysis - Mass spectrometry - Springs (components) - Sulfur dioxide Uncontrolled terms:Aerosol mass spectrometers - Aerosol mass spectrometry - Aerosol particulates - Air quality monitoring stations - Chemical compositions - Guangzhou - Single particle - Time resolution Classification code:451.2 Air Pollution Control - 601.2 Machine Components - 801 Chemistry - 804.2 Inorganic Compounds Numerical data indexing:Time 3.00e+02s DOI:10.13227/j.hjkx.202006045 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804556 Title:Remediation of Cd Contaminated Acidic Rice Fields Using the Combined Application of Lime and Organic Matter Title of translation:石灰配施有机物料修复酸性 Cd污染稻田 Authors:Li, Guang-Hui (1); Cheng, Qing (1); Chen, Hong (1, 2) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment Research, Chongqing; 400715, China Corresponding author:Chen, Hong(chenhong@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:925-931 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Using an in-situ experiment in Cd contaminated paddy fields in Chongqing, the absorption and distribution of Cd in rice plants was examined following the combined application of lime and organic matter, and the mechanisms driving changes in Cd fractions in soil were also studied. The results showed that pH, OM content, and CEC in the soil were significantly enhanced, and OM and CEC were significantly positively correlated, as pH showed a significant positive correlation; pH and CEC was mainly associated with a change in Cd from the acidic extractable fraction to the reducible, oxidable, and residual fractions. The percentage of acidic extractable Cd dropped by 22.92%-31.25% with the application of the amendments, thus reducing the accumulation of Cd in rice plants in the followed order: CK (control group)≫B6 (lime and maize straw)≈B4 (lime and biochar)≈B3 (lime and activated humic acidic fertilizer)>B2 (lime and humic acidic fertilizer)≈B1 (lime)>B5 (lime and oil cake). On the other hand, for both the treatments and control conditions (CK), the Cd content of brown rice was higher than Chinese standard (GB 2762-2017), while that of polished (white) rice was lower than the Chinese standard after treatment. Overall, treatment using all of the remediation agents offers some benefit for the safe utilization of agricultural contaminated soil and safe food production. The combined application of lime and oil cake proved the best measure for treating Cd contaminated acidic rice fields, yielding a reduction in acidic extractable Cd (31.25%), a reduction in the Cd content of rice plants (33.32%), and the lowest Cd content (0.13 mg•kg-1) in polished rice (a 42.17% compared to the control).
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Cadmium Controlled terms:Agricultural robots - Biogeochemistry - Contamination - Fertilizers - Lime - Oils and fats - Remediation - Soil pollution - Soils Uncontrolled terms:After-treatment - Chinese Standard - Contaminated soils - Control groups - Food production - In-situ experiments - Positive correlations - Residual fraction Classification code:454.2 Environmental Impact and Protection - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally Numerical data indexing:Percentage 2.29e+01% to 3.12e+01%, Percentage 3.12e+01%, Percentage 3.33e+01%, Percentage 4.22e+01% DOI:10.13227/j.hjkx.202007237 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779723 Title:Nitrogen and Phosphorus Leaching Characteristics and Adsorption Properties of Hardwood Biochar in Stormwater Runoff Title of translation:木屑生物炭在雨水径流中的氮磷淋出和吸附特性 Authors:Meng, Yi-Ke (1); Wang, Yuan (1, 2); Wang, Chuan-Yue (1) Author affiliation:(1) College of Civil and Transportation Engineering, Hohai University, Nanjing; 210098, China; (2) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing; 210098, China Corresponding author:Wang, Yuan(wangyuanhhu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4332-4340 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
At present, the fillers used in bioremanent systems are limited by problems such as unstable leaching and adsorption of nitrogen and phosphorus. To assess the feasibility of using hardwood biochar as a filter filler material in bioretention systems, it was compared to traditional filter filler materials, namely coconut chaff, compost, ceramsite, and volcanic stone. Experiments and tests were conducted to study the physico-chemical properties, leaching, and adsorption characteristics of hardwood biochar, and to explore the optimizing effect and mechanism of hardwood biochar in bioretention systems. Hardwood biochar created through high temperature pyrolysis was found to be porous and loose, with a saturated moisture content of 195.65% and good water retention capacity. After pyrolysis, the nitrogen and phosphorus elements on the hardwood biochar surface were converted into stable compounds. In a batch leaching experiment, the quantity of leached nitrogen was low, and the leaching speed was fast; phosphorus leaching was slow, although the linear negative value increased during artificial rainwater runoff leaching, and the adsorption effect was stable. When exposed to typical nitrogen and phosphorous concentrations in rainwater runoff (2 mg•L-1 of NH4+ and 2 mg•L-1 of PO43-), hardwood biochar adsorbed 34.6 mg•kg-1 NH4+ and 59.5 mg•kg-1 PO43-, showing outstanding comprehensive adsorption capacity. After reaching adsorption equilibrium, the average desorption rates of the hardwood biochar in deionized water were 21.23% and 17.43%, proving that the adsorption effect was stable. In conclusion, the application of hardwood biochar can mitigate excessive leaching of nutrients from fillers, as it has a better adsorption capacity for nitrogen and phosphorus. Therefore, hardwood biochar can be used as the filler material in bioretention systems, to reduce pollution associated with rainwater runoff.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Gas adsorption Controlled terms:Composting - Deionized water - Fillers - Hardwoods - Leaching - Nitrogen - Passive filters - Phosphorus - Pyrolysis - Runoff Uncontrolled terms:Adsorption capacities - Adsorption characteristic - Adsorption equilibria - Adsorption properties - High-temperature pyrolysis - Nitrogen and phosphorus - Phosphorous concentrations - Water retention capacity Classification code:442.1 Flood Control - 445.1 Water Treatment Techniques - 703.2 Electric Filters - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 2.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.74e+01%, Percentage 1.96e+02%, Percentage 2.12e+01% DOI:10.13227/j.hjkx.202101264 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945494 Title:Screening of Priority Pollutants and Risk Assessment for Surface Water from Shengjin Lake Title of translation:升金湖水体优先污染物筛选与风险评价 Authors:Gong, Xiong-Hu (1, 2); Ding, Qi-Qi (1, 2); Jin, Miao (1); Xue, Bin (1); Zhang, Lu (1); Yao, Shu-Chun (1); Wang, Zhao-De (1); Lu, Shao-Yong (3); Zhao, Zhong-Hua (1) Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Zhao, Zhong-Hua(zhzhao@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4727-4738 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Shengjin Lake, which serves as an important National Nature Reserve, is suffering from chemical pollution due to rapid industrial and agricultural development in the circumjacent basin. Therefore, 168 anthropogenic toxic chemicals were determined to examine their spatial distribution and identify priority pollutants using a ranking system based on occurrence(O), persistence(P), bioaccumulation(B), ecological risk(E), and human health risk(H). Ecosystem and human health risks were also assessed. The spatial distribution of pollutants indicated that higher concentrations occur in the upper lake area compared to the middle and lower lake areas because of Jiang Dam. According to the derived priority pollutant list, phthalate esters(PAEs), organochlorine pesticides(OCPs), and heavy metals(HMs)are high-priority pollutants; polychlorinated biphenyls(PCBs), polycyclic aromatic hydrocarbons(PAHs), and volatile organic compounds(VOCs)are medium-priority pollutants; and antibiotics(ANTs)are low-priority pollutants. The ecology risk quotient(RQ)of the high-priority pollutants ranged from 4.3 to 15.9, indicating severe ecology risk to the aquatic organism, and higher risks were found in the upper lake areas. Additionally, the human health risk assessment revealed negligible carcinogenic risks associated with high-priority pollutants. The comprehensive ranking system established in this study can be applied to other lake basins by altering the measured concentrations to screen for priority pollutants, offering a scientific foundation for identifying priority control pollutants for watershed management.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Lakes Controlled terms:Aquatic organisms - Biochemistry - Esters - Health - Health risks - Heavy metals - Lake pollution - Polychlorinated biphenyls - Polycyclic aromatic hydrocarbons - Risk assessment - Soil conservation - Spatial distribution - Water conservation - Water management Uncontrolled terms:Chemical pollution - Comprehensive ranking system - Ecology risk - Human health risks - Lake areas - Nature reserves - Priority pollutants - Ranking system - Risks assessments - Shengjin lake Classification code:405.3 Surveying - 444 Water Resources - 453 Water Pollution - 461.6 Medicine and Pharmacology - 461.7 Health Care - 471 Marine Science and Oceanography - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801.2 Biochemistry - 804.1 Organic Compounds - 902.1 Engineering Graphics - 914.1 Accidents and Accident Prevention - 921 Mathematics DOI:10.13227/j.hjkx.202102117 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239964 Title:Characteristics of Chemical Composition and Source Apportionment of Atmospheric Fine Particulate Matter in Luoyang Title of translation:洛阳市大气细颗粒物化学组分特征及溯源分析 Authors:Sun, Jia-Bin (1, 2); Dong, Zhe (1, 2); Li, Li-Ping (1, 2); Liu, Yang (2); Chen, Hong-Yang (2); Zhang, Rui-Qin (2, 3) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Research Institute of Environmental Science, Zhengzhou University, Zhengzhou; 450001, China; (3) College of Ecology and Environment, Zhengzhou; 450001, China Corresponding authors:Zhang, Rui-Qin(rqzhang@zzu.edu.cn); Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5624-5632 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To study the temporal and spatial distribution characteristics of the chemical components and sources of atmospheric fine particulate matter (PM2.5) in Luoyang and to supplement the relative lack of PM2.5-related research in the Fen-Wei Plain, samples were collected at two sites (Gaoxin and Linxiao) in Luoyang from April 2018 to January 2019, and the mass concentration, chemical composition (water-soluble ions, carbonaceous components, and elements), and sources of PM2.5 were analyzed. The annual average ρ(PM2.5) at the two sites were (76.6±37.9) μg•m-3 and (83.2±38.9) μg•m-3, respectively. PM2.5 showed the highest average concentration in winter, followed by spring and autumn, and the lowest in summer. The concentrations of nine water-soluble ions of Gaoxin and Linxiao accounted for 55.1% and 54.2% of PM2.5, of which secondary ions (NO3-, SO42-, and NH4+) in Linxiao were higher than those in Gaoxin. The annual average concentrations of organic carbon (OC) and elemental carbon (EC) were (12.4±7.7) μg•m-3 and (1.2±0.5) μg•m-3 in Gaoxin and (13.4±7.7) μg•m-3 and (1.3±0.5) μg•m-3 in Linxiao, respectively, and the average concentrations of carbonaceous constituents during the four seasons in Linxiao were higher than those in Gaoxin. The secondary organic carbon (SOC) of Gaoxin and Linxiao in winter accounted for 67.8% and 77.3% of OC, respectively, which was much higher than that in the other seasons. The results of the chemical mass balance model suggested that the main contribution of PM2.5 in the two sites were secondary nitrate (26.9% and 27.1%), secondary sulfate (14.5% and 14.8%), coal combustion (12.6% and 11.6%), and secondary organic aerosol (10.8% and 12.2%). The contribution of biomass burning was higher in Gaoxin than that in Linxiao, whereas fugitive dust and vehicle emissions contributed more to the PM2.5 in Linxiao. The analysis of backward trajectory and potential source contribution function showed that Luoyang was not only affected by pollutant transport from the northwest direction but also from the southwest region in spring. In summer, it was affected by the monsoon in the due east direction and some potential pollution from due south. In autumn, pollutants mainly came from the southeast, but there were also potential sources in the northwest. The pollutant transport in winter was mainly from the surrounding areas, and the pollution sources were more concentrated.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Organic carbon Controlled terms:Chemical analysis - Cluster analysis - Ions - Nitrates - Secondary emission - Spatial distribution - Sulfur compounds - Wetlands Uncontrolled terms:Chemical compositions - Chemical mass balance model - Fen-wei plain - Hybrid single-particle lagrangian integrated trajectory model - Lagrangian - Luoyang - PM 2.5 - Single-particle - Source apportionment - Trajectory models Classification code:405.3 Surveying - 723 Computer Software, Data Handling and Applications - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 902.1 Engineering Graphics - 921 Mathematics Numerical data indexing:Size 6.35E-02m, Percentage 1.08E+01%, Percentage 1.16E+01%, Percentage 1.22E+01%, Percentage 1.26E+01%, Percentage 1.45E+01%, Percentage 1.48E+01%, Percentage 2.69E+01%, Percentage 2.71E+01%, Percentage 5.42E+01%, Percentage 5.51E+01%, Percentage 6.78E+01%, Percentage 7.73E+01%, Size -7.62E-02m DOI:10.13227/j.hjkx.202104256 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650996 Title:Aging Process and DOC Analysis of Four Different Types of Plastic Particles in Freshwater Systems Title of translation:淡水系统中4种塑料颗粒的老化过程及DOC产物分析 Authors:Li, Wan-Yi (1, 2); Liu, Zhi-Lin (1, 2); Miao, Ling-Zhan (1, 2); Hou, Jun (1, 2) Author affiliation:(1) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China; (2) College of Environment, Hohai University, Nanjing; 210098, China Corresponding author:Miao, Ling-Zhan(lzmiao@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3829-3836 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Although the pollution of freshwater systems by microplastics and the resulting ecological effects have attracted widespread attention from scholars at home and abroad, the fragmentation of different types of microplastics in the natural environment has not yet received enough attention. To analyze the fragmentation processes and products of different types of microplastics, a 40 d natural light fragmentation experiment was carried out using four microplastics commonly found in water: polystyrene (PS), low-density polyethylene (LDPE), polypropylene (PP), and polyhydroxybutyrate (PHB). The pH, ORP, EC, and DO of the four types of plastic-aging liquids changed significantly during the aging process. During the weathering process, cracks and pores formed on the surface of LDPE and were later identified through scanning electron microscopy. Fourier transform infrared spectrometry indicated that the carbonyl index of LDPE increased the most in the experiment (an increase of 31.48%), suggesting that PP experienced significant aging. Dissolved organic carbon (DOC), a product of microplastics fragmentation, increased as weathering time progressed, and the concentration of DOC increased significantly after weathering for about 40 d. Compared with the baseline value, the concentration of DOC from PHB, PP, and LDPE in the leaching solution increased significantly, by 61.29%, 69.49%, and 89.15%, respectively. These results suggest that evident aging of microplastics in natural aquatic environments releases significant amounts of dissolved organic matter, and the ecological effects of this should be the subject of future research.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Microplastic Controlled terms:Ecology - Fourier transform infrared spectroscopy - Organic carbon - Polypropylenes - Scanning electron microscopy - Water - Weathering Uncontrolled terms:Dissolved organic carbon - Dissolved organic matters - Fourier transform infrared spectrometry - Fragmentation process - Low density polyethylene(LDPE) - Natural aquatic environments - Natural environments - Polyhydroxybutyrate Classification code:454.3 Ecology and Ecosystems - 801 Chemistry - 804.1 Organic Compounds - 815.1.1 Organic Polymers Numerical data indexing:Percentage 3.15e+01%, Percentage 6.13e+01%, Percentage 6.95e+01%, Percentage 8.92e+01% DOI:10.13227/j.hjkx.202011227 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065973 Title:Seasonal Variation and Source Apportionment of Carbonaceous Species in PM2.5 in Chengde Title of translation:承德市PM2.5中碳质组分的季节分布特征及来源解析 Authors:He, Bo-Wen (1); Nie, Sai-Sai (1); Wang, Shuai (1); Feng, Ya-Ping (1); Yao, Bo (1); Cui, Jian-Sheng (1) Author affiliation:(1) School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China Corresponding author:Yao, Bo(byao18@hebust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5152-5161 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to study the seasonal variations and pollution sources of carbonaceous species in PM2.5 in Chengde, the concentration of these components was determined in atmospheric PM2.5 samples collected in January, April, July, and October 2019. The change in carbonaceous species were analyzed based on the estimation of the ratio of organic carbon(OC)to elemental carbon(EC), total carbonaceous aerosol(TCA), and secondary organic carbon(SOC). The source of these pollutants was determined by means of the backward trajectory and principal component analysis(PCA). The results showed that the mean mass concentrations of PM2.5, OC, and EC during the sampling period were(31.26±21.39)μg•m-3, (13.27±8.68)μg•m-3, and(2.80±1.95)μg•m-3, respectively. The seasonal variations of PM2.5 were: winter [(47.68±30.37)μg•m-3]>autumn [(28.72±17.12)μg•m-3]>spring [(26.59±15.32)μg•m-3]>summer [(23.17±8.38)μg•m-3], consistent with the trend of total carbon(TC), OC, and EC. The source of OC and EC during winter(R2=0.85)was similar. Based on the ratio of OC/EC, all four seasons were affected by traffic and coal-burning source emissions, and the most affected season by bituminous coal emissions was winter. The average concentration of TCA was(21.38±13.68)μg•m-3, which accounted for 68.39% of PM2.5. The order of secondary conversion rate(SOC/OC)was: spring(54.09%)>autumn(37.64%)>summer(32.91%)>winter(25.43%). The results of the backward trajectory simulation show that the pollutant concentrations carried by air masses are relatively low in spring and summer, and the transport channels of pollutants are southwest in autumn and northwest in winter. The results of the PCA showed that the key to reducing PM2.5 in Chengde is to control emissions from vehicle exhausts, and coal and biomass combustion sources.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Principal component analysis Controlled terms:Bituminous coal - Organic carbon - Pollution - Trajectories Uncontrolled terms:Backward trajectory - Carbon carbons - Carbonaceous aerosol - Carbonaceous species - Characteristic of seasonal variation - Chengde city - Elemental carbon - PM 2.5 - Principal-component analysis - Seasonal variation Classification code:524 Solid Fuels - 804.1 Organic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Percentage 2.543E+01%, Percentage 3.291E+01%, Percentage 3.764E+01%, Percentage 5.409E+01%, Percentage 6.839E+01% DOI:10.13227/j.hjkx.202101082 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066054 Title:Land-based Nitrogen Pollution Source Structure and Spatial Distribution in Guangdong-Hong Kong-Macao Greater Bay Area Title of translation:粤港澳大湾区陆源氮污染来源结构与空间分布 Authors:Dong, Si-Qi (1, 2); Huang, Chong (1) Author affiliation:(1) State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Huang, Chong(huangch@lreis.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5384-5393 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Total nitrogen pollution from land-based sources carried by rivers is the main source of inorganic nitrogen entering the sea. Inorganic nitrogen pollution in the coastal waters of Guangdong-Hong Kong-Macao Greater Bay Area(GBA)is a serious problem. The water quality of an adjacent large area of the sea is classified as poor-category Ⅳ. Therefore, clarification of the scale, structure, and discharge pressure of nitrogen emissions from the land area of the GBA is needed to manage marine nitrogen pollution. Based on multi-source data, including land use, socio-economic statistics, and pollution source census information, the scale, source structure, and regional differences of total nitrogen discharge in GBA and surrounding cities were evaluated using administrative and watershed units. The results show that: ①The total nitrogen emissions from the study area are approximately 332 500 t. Residential waste is the main source of pollution, accounting for 55.4%, followed by cultivation, with 28.18%, while the contribution from animal husbandry and industrial production is relatively limited. ②The regional differences of total nitrogen emissions are obvious, and the total emissions from GBA(231 400 t) are significantly higher than those from neighboring cities(101 100 t). ③The distribution of marine pollution and intensity of land-based nitrogen pollution emissions are spatially consistent, which indicates that there is a large number of pollution emissions in the East River Basin, Northwest River Delta Basin, and Tan River Basin; the shoreline sections belonging to the basins carry the greatest emission pressure, lead to serious pollution in the Lingding Sea, Jin Bay, and Huangmao Sea.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Nitrogen Controlled terms:Economics - Industrial emissions - Land use - Marine pollution - River pollution - Rivers - Water quality - Watersheds Uncontrolled terms:Bay areas - Guangdong-hong kong-macao great bay area - Hong-kong - Inorganic nitrogen - Land-based pollution - Nitrogen emissions - Nitrogen pollution - Pollution pressure - Pollution sources - Total nitrogen Classification code:403 Urban and Regional Planning and Development - 444.1 Surface Water - 445.2 Water Analysis - 451.1 Air Pollution Sources - 453 Water Pollution - 804 Chemical Products Generally - 971 Social Sciences Numerical data indexing:Percentage 2.818E+01%, Percentage 5.54E+01% DOI:10.13227/j.hjkx.202102105 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066053 Title:Hydrochemical Characteristics and Controlling Factors of Groundwater in the Leizhou Peninsula Title of translation:雷州半岛地下水化学特征及控制因素分析 Authors:Peng, Hong-Xia (1); Hou, Qing-Qin (1); Zeng, Min (2); Huang, Chang-Sheng (2); Shi, Huan-Huan (1); Pi, Peng-Cheng (1); Pan, Yu-Jie (1) Author affiliation:(1) School of Geography and Information Engineering, China University of Geosciences, Wuhan; 430074, China; (2) Wuhan Center of China Geological Survey, Wuhan; 430205, China Corresponding author:Pan, Yu-Jie(panyujie@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5375-5383 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Groundwater resources in the Leizhou Peninsula provide a strong support for the economic and social development. Therefore, understanding the chemical characteristics and formation mechanism of groundwater in this area is necessary for the rational exploitation and sustainable utilization of water resources. In this study, 43 groundwater samples were collected, and the hydrochemical characteristics and controlling factors were analyzed by descriptive statistical analysis, Piper triangular diagrams, ArcGIS spatial interpolation, Gibbs diagram, and ion ratios. The results showed that: ① The anions and cations of the groundwater in the study area were mainly HCO3-, Ca2+, and Na+, and the hydrochemical types were mainly HCO3-Cl-Na-Ca, HCO3-Cl-Na-Ca-Mg, HCO3-Cl-Na-Mg, and HCO3-Na. The contents of Cl-, SO42-, and Na+were higher in the west of Leizhou City compared to other areas. The sites with higher contents of HCO3-, NO3-, Ca2+, Mg2+, and K+ were mainly concentrated in the southwest and eastern coastal areas. ② The chemical evolution of groundwater was mainly affected by water-rock interaction, cation alternating adsorption, and anthropogenic activities. The sources of Na+ and K+ were mainly from evaporative and silicate rocks, Ca2+ and Mg2+ were mainly from carbonate karstification, while NO3- originated from anthropogenic activities.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Groundwater Controlled terms:Groundwater geochemistry - Groundwater resources - Hydrochemistry - Positive ions - Silicate minerals Uncontrolled terms:Anthropogenic activity - Ca 2+ - Characteristic factors - Chemical characteristic - Controlling factors - Economic and social development - Formation mechanism - Hydrochemical characteristics - Leizhou peninsula - Sustainable utilization Classification code:444.2 Groundwater - 481.2 Geochemistry - 482.2 Minerals DOI:10.13227/j.hjkx.202104073 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066059 Title:Nitrite Regulation During Start-up of Combined Partial Nitritation and ANAMMOX Process Title of translation:一体式短程硝化-厌氧氨氧化工艺启动过程的亚硝酸盐调控 Authors:Zuo, Fu-Min (1, 2, 3); Zheng, Rui (4); Sui, Qian-Wen (1, 2); Zhong, Hui (1, 2); Chen, Yan-Lin (1, 2, 3); Wei, Yuan-Song (1, 2, 3, 5) Author affiliation:(1) State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Anping Hongjia Environmental Protection Technology Co., Ltd., Hengshui; 053600, China; (5) Institute of Energy, Jiangxi Academy of Sciences, Nanchang; 330096, China Corresponding authors:Wei, Yuan-Song(yswei@rcees.ac.cn); Wei, Yuan-Song(yswei@rcees.ac.cn); Wei, Yuan-Song(yswei@rcees.ac.cn); Wei, Yuan-Song(yswei@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5472-5480 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Two types of full-scale reactors(SBR, 116.6 m3, activated sludge process; SBBR, 64.8 m3, activated sludge and biofilm process)were inoculated with activated sludge from a swine wastewater treatment plant. The effect of NO2--N concentration on ANAMMOX was investigated in the reactors during the start-up of the combined partial nitritation and ANAMMOX(CPNA)process by controlling the dissolved oxygen(DO), aeration mode, and NaNO2 dosing. The results showed that the SBBR was more suitable for rapid start-up of partial nitritation under the same operation conditions. Despite NO2--N inhibition(100-129 mg•L-1, 7 days), the ANAMMOX process was successfully started by the SBR on day 39, and the total nitrogen removal rate and efficiency(TNRR and TNRE)were 0.069 kg•(m3•d)-1 and 23.3%, respectively. However, 17 days of NO2--N inhibition(129-286 mg•L-1)had an unrecoverable effect on ANAMMOX activity in the SBBR. By adding NaNO2, the SBR successfully started the CPNA process on day 77. The TNRR, TNRE, and activity of ANAMMOX from day 51 to 77 increased rapidly from 0.070 to 0.336 kg•(m3•d)-1, 16.0% to 52.2%, and 0.012 to 0.307 kg•(kg•d)-1, respectively. The gene copy concentration of AOB and ANAMMOX bacteria in the SBR increased from the original 8.06×106 and 4.42×104 copies•mL-1 to 1.02×109 and 1.77×107 copies•mL-1, respectively, which indicated that the rapid enrichment of AOB and ANAMMOX bacteria in the SBR was achieved mainly by controlling DO, aeration mode, and NaNO2 dosing. Reasonable nitrite regulation is the key for the start of the CPNA process.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Dissolved oxygen Controlled terms:Activated sludge process - Bacteria - Nitrogen oxides - Nitrogen removal - Polymerase chain reaction - Process control - Sodium compounds - Wastewater treatment Uncontrolled terms:Activated-sludge process - ANAMMOX - Biofilm process - Combined partial nitritation and ANAMMOX - Full-scale - Full-scale reactors - In situ start-up - Nitrite regulation - Partial nitritation - QPCR analyse Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 801.2 Biochemistry - 804.2 Inorganic Compounds Numerical data indexing:Age 1.918E-02yr, Age 4.658E-02yr, Mass 1.00E-04kg to 1.29E-04kg, Mass 1.20E-02kg to 3.07E-01kg, Mass 1.29E-04kg to 2.86E-04kg, Mass 6.90E-02kg, Mass 7.00E-02kg to 3.36E-01kg, Percentage 1.00E00%, Percentage 1.60E+01% to 5.22E+01%, Percentage 2.33E+01%, Size 1.166E+02m, Size 6.48E+01m DOI:10.13227/j.hjkx.202103229 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239947 Title:Spatial Variation and Risk Assessment of Heavy Metals in Soils of Main Torreya grandis Plantation Region in Zhejiang Province Title of translation:浙江省香榧主产区土壤重金属空间异质性及其生态风险 Authors:Wang, Min (1); Dong, Jia-Qi (1); Bai, Long-Long (1); Zhang, Yong (2); Jiang, Zhong-Long (2); Jiang, Ni-Wen (3); Wu, Jia-Sen (1, 3); Zhang, Lu-Yao (3); Fang, Jia (3); Fu, Wei-Jun (1, 3) Author affiliation:(1) Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang Agricultural and Forestry University, Lin'an; 311300, China; (2) Zhejiang Public Welfare Forest and State Forest Farm Management Station, Hangzhou; 310020, China; (3) State Key Laboratory of Subtropical Silviculture, Lin'an; 311300, China Corresponding authors:Fu, Wei-Jun(fuweijun@zafu.edu.cn); Fu, Wei-Jun(fuweijun@zafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5949-5957 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Torreya grandis cv. Merrillii (T. grandis) is a unique economic tree species in China, which contains rich nutritional, medicinal, and economic values. Currently, studies on T. grandis mainly focus on fruit quality and high yield measures, and there are few reports on the heavy metal pollution of T. grandis woodland soil. In order to study the pollution of soil heavy metals, the T. grandis producing areas (Zhuji, Shengzhou, Keqiao, and Dongyang) in the Kuaiji Mountains in Zhejiang Province, where T. grandis planting is concentrated, were taken as research objects. A total of 121 soil samples(0-20 cm) were systematically taken, and 13 types of heavy metals(As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, Sb, Sn, V, and Zn)were analyzed. At the same time, the minimum data set was constructed by combining the principal component analysis method, and six heavy metal elements (As, Cd, Cr, Cu, Ni, and Zn) that could represent the soil heavy metal element information to the greatest extent were screened out. Spatial heterogeneity and potential ecological risk of these six heavy metals were studied using geostatistics and other spatial analysis methods. The results indicated that the average ω(As), ω(Cd), ω(Cr), ω(Ni), ω(Cu), and ω(Zn) in the study area were 14.23, 0.14, 49.08, 27.05, 28.20, and 109.93 mg•kg-1, respectively. Additionally, the results by the semi-variance theory model fitting indicated that Cr, Ni, and Zn have strong spatial autocorrelation, whereas Cd, Cu, and As have moderate spatial autocorrelation. Kriging interpolation revealed the spatial distribution pattern of heavy metals in the soils of the study area. The ω(Cd), ω(Cr), and ω(Ni) in Dongyang City were low, whereas the ω(Cd), ω(Cr), and ω(Ni) were high in some areas of Zhuji City. The accumulation of Cd in Zhuji City, Keqiao Distric, and Shengzhou City was high, whereas the local accumulation of As in the soil of the study area was the most severe. The high values were mainly distributed in the areas west of Zhuji City and east of Shengzhou City, whereas the low values were mainly distributed in the areas east of Zhuji City and west of Keqiao District. The results of the single factor pollution index and Nemerow pollution index showed that the six heavy metals in the study area all exceeded the standard, showing different degrees of accumulation characteristics. The distribution of heavy metals in Zhuji City was affected by early copper mining and long-term blind and excessive fertilization. The accumulation of heavy metals in other areas was mainly caused by human activities such as unreasonable fertilization methods, especially the excessive use of phosphate and organic fertilizers by farmers. The evaluation results of potential ecological hazards showed that the study area was being subjected to a mild degree of harm, with Cd presenting the largest potential risk.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Principal component analysis Controlled terms:Autocorrelation - Heavy metals - Interpolation - Metal analysis - Risk assessment - Soil pollution - Soils - Spatial variables measurement Uncontrolled terms:Ecological risk assessment - Geo-statistics - Merrillii - Principal-component analysis - Soil heavy metals - Spatial autocorrelations - Study areas - Torreya grandis - Torreyum grandi cv. - Zhejiang Province Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements Numerical data indexing:Mass 1.0993E-04kg, Size 0.00E00m to 2.00E-01m DOI:10.13227/j.hjkx.202104238 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239953 Title:Source Analysis and Health Risk Assessment of Toxic Volatile Organic Compounds in Nanjing in Summer and Winter Title of translation:南京毒性挥发性有机化合物夏冬季源解析及健康风险评估 Authors:Zhang, Zi-Jin (1, 2); Lin, Yu-Chi (1, 2); Zhang, Yu-Xian (1, 2); Cao, Meng-Yao (1, 2); Zhang, Yan-Lin (1, 2) Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Key Laboratory of Meteorological Disaster, Minister of Education, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding authors:Lin, Yu-Chi(yuchilin@nuist.edu.cn); Lin, Yu-Chi(yuchilin@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5673-5686 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The atmospheric VOC concentrations were measured in Nanjing using an online gas chromatography mass spectrometer/flame ionization detector (GC/MS) in the summer and winter of 2018. The health risk induced by the VOCs and their potential sources were also quantified. Our results showed that φ(total VOCs)was 105.7×10-9 in the winter, which was 3.1 times higher than that in the summer (34.5×10-9), and alkanes were the predominant component of the ambient VOCs. The non-carcinogenic and carcinogenic risks caused by the toxic VOCs were estimated to be 9.43 and 1.0×10-4 in the winter, respectively, exceeding that in the summer by a factor of 1.7 and 3.8. Acrolein and 1,2-dichloroethane were the dominant species contributing to non-cancer and cancer risks, respectively. Using a positive factorization matrix (PMF) model, the five sources for health risks were identified, including solvent coating materials, biomass burning vehicle emissions, petrochemical refinery, and solvent usage. Note that vehicle emissions contributed the largest fraction (28.2% in summer and 48.0% in winter) to carcinogenic risk in Nanjing. Thus, we highlighted that the strict reduction of specific VOCs from vehicle emissions would decrease the threats to human health in Nanjing City.
© 2021, Science Press. All right reserved. Number of references:58 Main heading:Volatile organic compounds Controlled terms:Diseases - Gas chromatography - Health risks - Ionization of gases - Risk assessment - Risk perception - Vehicles Uncontrolled terms:Carcinogenic and non-carcinogenic risk - Carcinogenic risk - Carcinogenics - Health risk assessments - Nanjing - Online gas chromatography - Source analysis - Source apportionment - Toxic volatile organics - Vehicle emission Classification code:461.7 Health Care - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.82E+01%, Percentage 4.80E+01%, Size 2.39522E-01m, Size 2.54E-06m, Size 2.68478E-09m DOI:10.13227/j.hjkx.202103037 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239974 Title:Relationship Characteristics and Risk Assessment of Heavy Metal Contents in Soil Aggregates and in Crops Around a Typical Pb-Zn Mining Area Title of translation:典型铅锌矿区耕地土壤团聚体重金属含量与农作物含量相关性及其风险评价 Authors:Qiang, Yu (1); Li, Ying-Ju (1); Luo, Qian (1); Chen, Mei-Feng (1); Li, Hai-Yan (1); Huang, Xian-Fei (1); Qin, Fan-Xin (2, 3) Author affiliation:(1) Guizhou Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University, Guiyang; 550001, China; (2) School of Life Sciences, Guizhou Normal University, Guiyang; 550025, China; (3) Guizhou Key Laboratory of Plant Physiology and Developmental Regulation, Guizhou Normal University, Guiyang; 550025, China Corresponding authors:Qin, Fan-Xin(qinfanxin@126.com); Qin, Fan-Xin(qinfanxin@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5967-5976 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The threat that heavy metals in soil aggregates pose to the ecological environment is an issue that should not be neglected. In order to determine the relationship between heavy metals in soil aggregates and those in crops, and to study the potential risk of heavy metals in soil aggregates, a portion of arable land in the Caiyuanhe lead-zinc mining area, which belongs to the section of Mapo lead-zinc mining in Duyun City, Guizhou province, was selected as the study area. The soil sample was collected from the cultivated layer (0-20 cm), and all crops were classified as leaf crops, fruit crops, and grain crops. The various sizes of soil aggregates sieved were>2, 1-2, 0.5-1, 0.25-0.5, 0.053-0.25, and<0.053 mm. The contents of cadmium (Cd), lead (Pb), and zinc (Zn) in different soil aggregates, the accumulation characteristics of these metals by crops, and the Pearson correlation between these metals in soil aggregates and crops were studied and discussed. The ecological risk of heavy metals in different sized aggregates and the health risk of heavy metals in crops were assessed via the potential ecological risk index (RI) and the hazardous quotient (HQ), respectively. The results showed that: ① the contents of Cd increased with the increase in soil aggregate size, and the concentrations of Pb and Zn in different aggregates followed the order of 0.25-0.5 mm>0.53-0.25 mm>0.5-1 mm>2 mm>0.053 mm; ② the enrichment capacity of all the crops included in the study was Cd>Zn>Pb; ③ the Pearson correlation analysis suggested that grain crops could enrich and transfer Pb in soil aggregates of different size, and the Zn in grains mainly originated from soil aggregates with a size of>1 mm; ④ it was also found that soil aggregates of a smaller size presented a greater total potential ecological risk. The order of ecological risk of heavy metals in soil aggregates of the same size was Cd>Pb>Zn. Moreover, the Pb in leaf crops and fruit crops poses a great health risk to children in the study area.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Risk assessment Controlled terms:Aggregates - Correlation methods - Crops - Fruits - Grain (agricultural product) - Health - Health risks - Heavy metals - Soil pollution - Soils - Vegetables Uncontrolled terms:Ecological risks - Fruit crops - Grain crops - Heavy metals in soil - Lead-zinc mining - Lead-zinc mining area - Mining areas - Risks assessments - Soil aggregate - Study areas Classification code:406 Highway Engineering - 412.2 Concrete Reinforcements - 461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Size 0.00E00m to 2.00E-01m, Size 1.00E-03m, Size 2.00E-03m, Size 2.50E-04m to 5.00E-04m, Size 5.00E-04m to 1.00E-03m, Size 5.30E-04m to 2.50E-04m, Size 5.30E-05m DOI:10.13227/j.hjkx.202104253 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239912 Title:Influencing Factors of Nitrogen Removal from Low-Pollution Water by Aerated Constructed Wetland Title of translation:曝气人工湿地脱除低污染水中氮的影响因素 Authors:Li, Lin-Lin (1, 2); Li, Rong-Tao (1, 3); Kong, Wei-Jing (1); Yang, Ping-Guo (3); Du, Zhi-Chao (1, 4); Bi, Bin (1); Lu, Shao-Yong (1) Author affiliation:(1) State Environmental Protection Key Laboratory for Lake Pollution Control, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Environmental Protection Scientific Observation and Research Station for Lake Dongting, Beijing; 100012, China; (2) College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (3) College of Life Sciences, Shanxi Normal University, Linfen; 041000, China; (4) School of Civil Engineering, Liaoning Technical University, Fuxin; 123000, China Corresponding authors:Yang, Ping-Guo(lfypg@126.com); Lu, Shao-Yong(lushy2000@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5857-5864 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Low-pollution water has become an important contributor of nitrogen in surface water due to its large discharge volume and wide range of sources. To investigate the influencing factors of nitrogen removal from low-pollution water by constructed wetlands (CW), aerated CW was constructed, and the removal effects of different forms of nitrogen in low-pollution water under different operating conditions were analyzed. The results showed that the removals of TN and NO3--N were positively correlated with hydraulic retention time (HRT), C/N ratio, and temperature (r>0.65, P<0.01) and negatively correlated with DO concentration (r<-0.85, P<0.01). However, there was no significant correlation between the removal of NH4+-N and these factors (P>0.05). The change in aeration rate and HRT adjusted the DO concentration in the wetland, so as to create alternate aerobic and anoxic environments, which was conducive to the nitrification and denitrification process. When the aeration rate was 0.2 L•min-1 and HRT was 1 d, the removal rates of TN, NH4+-N, and NO3--N from the low-pollution water by the aerated CW were 90.15%, 98.25%, and 86.22% respectively, which realized the simultaneous and efficient removal of TN, NH4+-N, and NO3--N. C/N ratio and temperature played important roles in the removal of TN and NO3--N. The TN and NO3--N removal efficiency increased with increasing C/N ratio. When the influent C/N was 5, the removal rates of TN and NO3--N reached their peak, 68.49% and 50.48% respectively, and the TN removal rate was 37.43% higher than that with no influent carbon source (C/N=0). In addition, when the temperature increased from 8-12℃ to 28-32℃, the nitrogen removal rate of the aerated CW increased gradually. Compared with those at low temperatures (8-12℃), the removal rates of TN and NO3--N increased by 29.37% and 50.24%, respectively, at high temperatures (28-32℃), whereas the removal rate of NH4+-N was not affected by C/N ratio and temperature.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Wetlands Controlled terms:Denitrification - Efficiency - Nitrification - Nitrogen removal - River pollution - Surface waters Uncontrolled terms:Aerated constructed wetland - Aeration rate - C:N ratio - DO concentration - Hydraulic retention - Low pollution - Low pollution water - NH 4 + N - Removal rate - Retention time Classification code:444.1 Surface Water - 453 Water Pollution - 802.2 Chemical Reactions - 913.1 Production Engineering Numerical data indexing:Percentage 2.937E+01%, Percentage 3.743E+01%, Percentage 5.024E+01%, Percentage 5.048E+01%, Percentage 6.849E+01%, Percentage 8.622E+01%, Percentage 9.015E+01%, Percentage 9.825E+01%, Volume 2.00E-04m3 DOI:10.13227/j.hjkx.202101294 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945214 Title:Speciation and Ecological Risk Assessment of Heavy Metal(loid)s in the Municipal Sewage Sludge of China Title of translation:我国城市污泥中重金属的赋存形态与生态风险评价 Authors:Geng, Yuan-Meng (1); Zhang, Chuan-Bing (2); Zhang, Yong (2); Huang, Dou-Dou (2); Yan, Shu-Xiao (2); Sun, Teng-Fei (2); Cheng, Liu (3); Wang, Jing (1); Mao, Yu-Xiang (1) Author affiliation:(1) Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo; 454003, China; (2) Huaxia Besince Environmental Technology Co., Ltd., Zhengzhou; 450008, China; (3) College of Chemistry and Environmental Engineering, Anyang Institute of Technology, Anyang; 455000, China Corresponding author:Mao, Yu-Xiang(yuxiangmao@hpu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4834-4843 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To reveal the speciation and pollution status of heavy metal(loid)s (HMs)in the dewatered sewage sludge(SS)of municipal wastewater treatment plants(MWTPs)in China, SS samples were collected from 40 MWTPs located in different regions of China. The total concentrations and geochemical fractions of As, Cd, Cr, Cu, Ni, Pb, and Zn in the SS samples were analyzed. The ecological risks induced by HMs in the SS were assessed based on the toxicity characteristic leaching procedure(TCLP), risk assessment code(RAC), and potential ecological risk index(RI). The median values of HMs in SS followed the order Zn> Cu> Cr> Pb> Ni> As> Cd. The general attainment rates of HMs in SS were satisfactory(> 90%). As showed a generally even distribution among all the fractions; Cd and Zn mainly existed in the reducible fraction; Cr mainly occurred in the residual fraction, followed by oxidizable and reducible fractions; Cu mainly occurred in the oxidizable fraction; Ni occurred mainly as exchangeable forms; and Pb mainly occurred in the reducible and residual fractions, with its exchangeable form being the lowest fraction. According to the RAC method, the environmental risks induced by HMs in the SS followed the order Ni> As> Zn> Cd> Cu> Cr> Pb. The ecological risk of Ni was high; Zn, As, and Cd had a medium level of risk; Cr and Cu had a low level of risk; and the risk of Pb was negligible. According to the RI method, Cd and Cu showed the highest potential ecological risk, indicating that these are the primary HM pollutants in the SS. However, if the agricultural application of SS is carried out in accordance with the national standards, the overall level of risk from soil HM pollution is considered relatively low.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Risk assessment Controlled terms:Agriculture - Cadmium - Cadmium compounds - Chromium - Copper - Leaching - Nickel - Sewage sludge - Toxicity - Wastewater treatment - Zinc Uncontrolled terms:Ecological risk assessment - Ecological risks - Heavy metal(loid)s (HM) - Metal(loid)s - Municipal wastewater treatment plants - Potential ecological risk - Residual fraction - Risk assessment code - Sludge samples - Toxicity characteristics leaching procedures Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 461.7 Health Care - 543.1 Chromium and Alloys - 544.1 Copper - 546.3 Zinc and Alloys - 548.1 Nickel - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 9.00E+01% DOI:10.13227/j.hjkx.202101145 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945216 Title:Pollution Characteristics and Risk Assessment of Tetracycline Antibiotics in Farmland Soil in Yinchuan Title of translation:银川市农田土壤中四环素类抗生素的污染特征及生态风险评估 Authors:Zhang, Xiao-Hong (1, 2); Tao, Hong (1, 2); Wang, Ya-Juan (3); Ma, Zhi-Yi (1); Zhou, Ze-Ying (1) Author affiliation:(1) School of Geography and Planning, Ningxia University, Yinchuan; 750021, China; (2) Key Laboratory(China-Arab)of Resource Evaluation and Environmental Regulation of Arid Region in Ningxia, Yinchuan; 750021, China; (3) School of Economics and Management, Ningxia University, Yinchuan; 750021, China Corresponding author:Wang, Ya-Juan(358437013@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4933-4941 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A total of 43 surface soil samples were collected from Yinchuan farmland and high performance liquid chromatography(HPLC)was used to measure the concentrations of oxytetracycline(OTC), tetracycline(TC), chlortetracycline(CTC), and doxycycline(DOC). The pollution characteristics and spatial distribution of TC were further analyzed using spatial Kriging interpolation, and the ecological risks of OTC, TC, CTC, and DOC in farmland soils were also assessed. Tetracycline antibiotics were detected in all the soil samples at concentrations ranging from 40.68 to 1 074.42 μg•kg-1 and an average of 462.24 μg•kg-1. The average proportions were ranked ∑TCs: CTC(69.26%)> OTC(16.34%)> TC(12.86%)> DOC(1.54%), and CTC pollution was the most serious among. The space tended to be high in the middle and low in the periphery, but the concentrations of TC were highest in the northwest. The average contents of ∑TCs in different soils was ranked as follows: vegetable field(596.01 μg•kg-1)> pasture(487.04 μg•kg-1)> cultivated land(437.52μg•kg-1)> garden plot(404.99 μg•kg-1). The average risk values of OTC, TC, CTC, and DOC in farmland soils were 0.14, 0.69, 0.14, and 1.02, respectively. TC and DOC represented a high level of risk in 23.26% and 6.98% of the samples, respectively, which requires particular attention.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Risk assessment Controlled terms:Antibiotics - Farms - High performance liquid chromatography - Interpolation - Soil pollution - Soil surveys - Soils Uncontrolled terms:Chlortetracyclin - Doxycycline - Farmland soils - Pollution characteristic - Risks assessments - Soil sample - Surface soil - Tetracycline antibiotics - Tetracyclines (TCs) - Yinchuan Classification code:461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention - 921.6 Numerical Methods Numerical data indexing:Mass 4.0499E-07kg, Mass 4.3752E-07kg, Mass 4.6224E-07kg, Mass 4.8704E-07kg, Mass 5.9601E-07kg, Mass 7.442E-08kg, Percentage 1.286E+01%, Percentage 1.54E+00%, Percentage 1.634E+01%, Percentage 2.326E+01%, Percentage 6.926E+01%, Percentage 6.98E+00% DOI:10.13227/j.hjkx.202012241 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110401070 Title:Advances and Challenges in Biosafety Research for Urban Environments Title of translation:城市环境生物安全研究的进展与挑战 Authors:Su, Jian-Qiang (1); An, Xin-Li (1); Hu, An-Yi (1); Zhu, Yong-Guan (1, 2) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Zhu, Yong-Guan(ygzhu@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2565-2572 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The global emergence of infectious diseases significantly threatens biosafety and human health. Anthropogenic activities, including rapid urbanization, agricultural intensification, global trade, and travel, are major drivers of zoonotic disease emergence. Emphasizing on the nexus of human, animal, and environmental health, the 'One Health' approach has been widely accepted for managing and preventing zoonoses. Urban environments are characterized by strong and complex interactions among the microbiomes of humans, animals, and various environmental components, which manifest critical roles in urban biosafety. This review summarizes the recent advances and major challenges facing biosafety in urban environments. We also propose a prevention and control system for biosafety in urban environments through multi-sectoral and transdisciplinary collaborations to improve risk assessment and prevention for zoonotic disease threats at the system level.
© 2021, Science Press. All right reserved. Number of references:85 Main heading:Biohazards Controlled terms:Agricultural robots - Agriculture - Animals - Disease control - Man machine systems - Risk assessment - Urban planning Uncontrolled terms:Agricultural intensification - Anthropogenic activity - Environmental health - Infectious disease - Prevention and controls - Rapid urbanizations - Risk assessment and preventions - Urban environments Classification code:403.1 Urban Planning and Development - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202011054 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779736 Title:Distribution Characteristics and Health Risk Assessment of Metal Elements in Groundwater of Longzici Spring Area Title of translation:龙子祠泉域地下水金属元素分布特征及健康风险评价 Authors:Xie, Hao (1, 2); Liang, Yong-Ping (1, 2); Li, Jun (1, 2, 3); Zou, Sheng-Zhang (1, 2); Shen, Hao-Yong (1, 2); Zhao, Chun-Hong (1, 2); Wang, Zhi-Heng (1, 2) Author affiliation:(1) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) International Research Center on Karst under the Auspices of United Nations Educational, Scientific and Cultural Organization, Guilin; 541004, China; (3) Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources, Hebei University of Architecture, Zhangjiakou; 075000, China Corresponding author:Li, Jun(lipshydro@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4257-4266 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Longzici Spring is an important water source for industry, agriculture, and urban life in Linfen City. With the improvements in public environmental health awareness, it is particularly necessary to study the health risk of posed by metal elements in groundwater. In this study, 43 groundwater samples from Longzici Spring area were analyzed for ten metal elements (As, Cd, Hg, Al, Pb, Co, Mn, Fe, Cu, and Ni). The distribution and health risk of these metal elements in the groundwater were studied using multivariate statistical analysis and a health risk assessment model. The results show that metal elements can be ranked, from high to low, by their average concentrations in groundwater in the following order: Fe, Al, Mn, Ni, As, Cu, Co, Pb, Hg, and Cd. The concentration of Al, Mn, Fe, and As exceed the limit for class Ⅲ water, as defined in the quality standard for groundwater (GB/T 14848-2017). Different types of groundwater in the spring area showed different metal contents. The quality of karst spring water was good, reaching the standard for drinking water, while mine drainage water exceeded the standard for drinking water, with the highest metal concentration (60%) and the worst water quality. Multivariate statistical results show that Pb, Ni, Co, Cd, Mn, and Cu concentrations were mainly affected by the geochemical background, while Al, Fe, Hg, and As concentrations were closely related to human mining activities under the unique geological background of Shanxi Province. The health risk assessment showed that the different types of groundwater could be ranked by the annual total health risks, posed by metal elements to adults and children through drinking water and skin infiltration, as follows: karst well> non-karst spring> non-karst well> karst spring. The health risks mainly came from drinking water, while health risks through skin infiltration would not cause obvious harm to the human body. The metal element causing the greatest health risk in spring groundwater was As, which should therefore be controlled in the utilization of water resources, especially in children's drinking water.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Infiltration Controlled terms:Agricultural robots - Groundwater - Groundwater resources - Health - Health risks - Landforms - Manganese removal (water treatment) - Metals - Multivariant analysis - Pollution - Potable water - Risk assessment - Springs (components) - Springs (water) - Water quality Uncontrolled terms:Average concentration - Distribution characteristics - Environmental health - Geochemical background - Geological background - Metal concentrations - Mine-drainage water - Multivariate statistical analysis Classification code:444 Water Resources - 444.2 Groundwater - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 461.6 Medicine and Pharmacology - 461.7 Health Care - 481.1 Geology - 601.2 Machine Components - 914.1 Accidents and Accident Prevention - 922 Statistical Methods Numerical data indexing:Percentage 6.00e+01% DOI:10.13227/j.hjkx.202101204 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779618 Title:Pollution Level, Distribution Characteristic, and Ecological Risk Assessment of Environmentally Persistent Pharmaceutical Pollutants in Surface Water of Jiangsu Province Title of translation:环境持久性药物在江苏省地表水中的污染水平, 分布特征及生态风险评估 Authors:Zhao, Mei-Mei (1, 2); Fan, De-Ling (2); Gu, Wen (2); Wang, Zhen (2); Liang, Meng-Yuan (2); Liu, Ji-Ning (2); Zhang, Zhi (1) Author affiliation:(1) College of Modern Agriculture and Ecological Environment, Heilongjiang University, Harbin; 150080, China; (2) Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing; 210042, China Corresponding authors:Wang, Zhen(wangzhen@nies.org); Zhang, Zhi(dr_zhangzhi@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4222-4233 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Because Jiangsu is an important economic province of China, it is necessary to examine the pollution characteristics and assess the ecological risk of environmentally persistent pharmaceutical pollutants (EPPPs) in this region. In this study, surface water samples were obtained from grade 1-4 rivers and lakes (with an area of 50 km2 or more) in Jiangsu Province, and then analyzed to determine the pollution level of EPPPs. In total, 35 EPPPs were detected in the surface water of Jiangsu Province, with total concentrations in the samples ranging from 66.74 to 2 189.83 ng•L-1. The 17 EPPPs with a detection rate of more than 25% are discussed in this study. The total concentrations of 35 EPPPs were 72.48-1 142.79 ng•L-1, and the mean concentration was 345.20 ng•L-1. The total concentration of EPPPs was higher in the north and south than in the central part of Jiangsu. Yangzhou city had the highest concentration of EPPPs in the whole province, and the main sources of this pollution were domestic sewage, shipping sewage discharge, and drug use in fishery breeding. The total concentration of EPPPs decreased on both sides of the region, with the Beijing-Hangzhou Canal and waste from the Yellow River forming the middle line. An ecological risk assessment of 17 EPPPs showed that single target drugs posed a low risk to water ecology in Jiangsu Province. The combined risk quotient of 17 EPPPs in water of Jiangsu Province was 0.03-0.52, indicating that EPPPs posed a low to moderate risk.
© 2021, Science Press. All right reserved. Number of references:66 Main heading:River pollution Controlled terms:Risk assessment - Sewage - Surface waters Uncontrolled terms:Detection rates - Distribution characteristics - Ecological risk assessment - Ecological risks - Jiangsu province - Mean concentrations - Rivers and lakes - Sewage discharges Classification code:444.1 Surface Water - 452.1 Sewage - 453 Water Pollution - 914.1 Accidents and Accident Prevention Numerical data indexing:Area 5.00e+07m2, Mass_Density 1.43e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 1.90e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 3.45e-07kg/m3 to 2.20e-02kg/m3, Percentage 2.50e+01% DOI:10.13227/j.hjkx.202012058 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126257 Title:Emission Characteristics and Toxicity Effects of Halogenated Polycyclic Aromatic Hydrocarbons from Coal-Fired and Waste Incineration Power Plants Title of translation:燃煤电厂和垃圾焚烧电厂燃烧产物中卤代多环芳烃的赋存特征和毒性风险 Authors:Ni, Xiu-Feng (1); Wang, Ru-Wei (2, 3); Cai, Fei-Xuan (2); Cai, Jia-Wei (2) Author affiliation:(1) College of Environmental & Resource Sciences, Zhejiang University, Hangzhou; 310058, China; (2) School of Environment, Jinan University, Guangzhou; 511443, China; (3) Key Laboratory of Coal Processing & Efficient Utilization, Ministry of Education, University of Mining and Technology, Xuzhou; 221116, China Corresponding author:Wang, Ru-Wei(wangruwei@jnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1660-1667 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Coal-fired power plants (CFPPs) and waste incineration power plants (WIPPs) represent a large portion of polycyclic aromatic hydrocarbons (PAHs) sources in the environment, among which halogenated PAHs (HPAHs) are more toxic to the human body compared with their corresponding parent PAHs. In the current work, we investigated the occurrence, formation mechanism, and toxicity effects of HPAHs in the coal and waste combustion products from three CFPPs and one WIPP. The results indicate that the contents of chlorinated PAHs (Cl-PAHs) in the fly ash from the CFPPs and WIPP were 1.06-1.67 ng•g-1 and 2.76 ng•g-1, respectively, and the contents of brominated PAHs (Br-PAHs) in the fly ash from the CFPPs and WIPP were 26.4-44.2 ng•g-1 and 6.31 ng•g-1, respectively. The HPAH contents in the fly ash from the WIPP were significantly higher than those from the CFPPs primarily due to the abundant plastics in the domestic waste, represented by polyvinyl chloride, resulting in the formation of Cl-PAHs during combustion. The HPAH contents in the fly ash from the pulverized coal-fired (PC) boiler were significantly higher than those from the circulating fluidized bed (CFB) boiler mostly due to the higher combustion temperature operated in the PC boiler. The HPAHs in the fly ash from coal combustion were predominantly 7-BrBaA and 9-ClPhe, and those from domestic combustion were predominantly 9-BrPhe and 2-ClAnt. In addition, the contents of 7-BrBaA and 9, 10-Br2Ant in the coal combustion fly ash were significantly higher than those in domestic waste combustion fly ash, whereas 2-BrFle exhibited a contrasting profile. The content of Br-PAHs in the fly ash treated by semi-dry deacidification was twice that in dust removal fly ash but significantly increased in the chelating agent stabilization fly ash. The Pearson correlation analysis indicated the the formation mechanism of Cl-PAHs and Br-PAHs were the same but a secondary formation of HPAHs during the chelating agent stabilization of the fly ash was deduced. The TEQ values of the HPAHs in the fly ash (8.87×10-3-15.0×10-3 ng•g-1) from the WIPP were similar to those in the fly ash from the CFPPs (10.0×10-3 ng•g-1), which were significantly reduced in the fly ash treated by semi-dry deacidification due to the removal of 7-BrBaA. Moreover, the TEQ values of the HPAHs in the fly ash increased 5.4 times after the chelating agent stabilization. The ecological risk should be considered for the CFPP fly ash due to their massive amount of discharge and high TEQ values.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Coal combustion Controlled terms:Boilers - Chelation - Chlorine compounds - Coal - Coal ash - Coal industry - Correlation methods - Fluidized bed combustion - Fluidized bed process - Fluidized beds - Fly ash - Fossil fuel power plants - Halogenation - Mineral oils - Polycyclic aromatic hydrocarbons - Polyvinyl chlorides - Stabilization - Toxicity - Waste incineration Uncontrolled terms:Circulating fluidized bed boiler - Coal-fired power plant - Combustion temperatures - Ecological risks - Emission characteristics - Formation mechanism - Pearson correlation analysis - Polycyclic aromatic hydrocarbons (PAHS) Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.7 Health Care - 513.3 Petroleum Products - 521.1 Fuel Combustion - 524 Solid Fuels - 614 Steam Power Plants - 802.2 Chemical Reactions - 804.1 Organic Compounds - 815.1.1 Organic Polymers - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202007298 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804541 Title:Diversity and Function Prediction of Bacterioplankton Under Human Disturbance in the Main Stream of the Laoguan River Before and After the Flood Season Title of translation:汛期前后老鹳河干流人类干扰下浮游细菌多样性及功能预测 Authors:Han, Xue-Mei (1, 2); Gong, Zi-Le (1, 2); Yang, Xiao-Ming (1, 2); Li, Yu-Ying (1, 2); Chen, Zhao-Jin (1, 2); Zhu, Hui-Hui (1, 2); Wang, Fan-Mei (1, 2) Author affiliation:(1) School of Water Resources and Environmental Engineering, Nanyang Normal University, Nanyang; 473061, China; (2) International Joint Laboratory of Watershed Ecological Security and Collaborative, Innovation Center of Water Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, Nanyang Normal University, Nanyang; 473061, China Corresponding author:Li, Yu-Ying(lyying200508@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:831-841 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Laoguan River is the tributary of Danjiangkou Reservoir located nearest to the water diversion outlet, and water quality here directly affects the safety of the diverted water. To explore the community composition and functional change of bacterioplankton in the Laoguan River before and after the flood season, four representative sites were sampled in the main stream before (May) and after (October) the 2018 and 2019 flood seasons. Water quality was assessed and high-throughput sequencing of bacterioplankton was performed. Yanghe (YH) was slightly disturbed, Xixiabei (XX) was moderately disturbed, Dangziling (DZL) was heavily disturbed, and Zhangying (ZY) was moderately disturbed. In total, 599 genera from 40 phyla were collected. The diversity of bacterioplankton before the flood season was higher than afterwards, and moderate levels of disturbance increased the Shannon-Wiener diversity index. LEfSe analysis indicated that significant differences existed in some dominant phyla; Armatimonadete in Yanghe, Epsilonbacteraeota and Firmicutes in Xixiabei, and Cyanophyta in Dangziling dominated before flood season, while significant differences only occurred in Firmicutes and Cyanophyta in Dangziling after the flood season. The PCoA of the bacterioplankton community showed that the sampling points were distinct before and after the flood season, and that differences among samples were greater before the flood season. The RDA and CCA indicated that total nitrogen and ammonia nitrogen were the main environmental factors causing declines in bacterioplankton diversity. PICRUSt showed a total of ten dominant categories of COG function genes. A total of 30 KO function genes related to nitrogen metabolism group also different between the two periods, with greater differences before flood season. The genes cynt and can in Yanghe were significant different from the other three sampling points before the flood season. Overall, nitrogen and phosphorus were the main factors regulating the bacterioplankton community structure and eutrophication in the Laoguan River. Changes in nitrogen inputs will result in changes in microbial nitrogen metabolic function in different regions of the river.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Floods Controlled terms:Ammonia - Eutrophication - Flood control - Genes - Metabolism - Nitrogen - Reservoirs (water) - River diversion - River pollution - Water quality Uncontrolled terms:Community composition - Community structures - Danjiangkou reservoir - Environmental factors - High-throughput sequencing - Nitrogen and phosphorus - Nitrogen metabolism - Shannon-wiener diversity indices Classification code:441 Dams and Reservoirs; Hydro Development - 441.2 Reservoirs - 442.1 Flood Control - 445.2 Water Analysis - 453 Water Pollution - 461.2 Biological Materials and Tissue Engineering - 804 Chemical Products Generally - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202007082 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804532 Title:Ozone Pollution, Nitrogen Addition, and Drought Stress Interact to Affect Non-structural Carbohydrates in the Leaves and Fine Roots of Poplar Title of translation:臭氧污染,氮沉降和干旱胁迫交互作用对杨树叶和细根非结构性碳水化合物的影响 Authors:Li, Pin (1); Zhou, Hui-Min (2); Feng, Zhao-Zhong (3) Author affiliation:(1) College of Forestry, Beijing Forestry University, Beijing; 100083, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:1004-1012 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ground-level ozone (O3) pollution frequently co-occurs with drought and nitrogen (N) deposition during the growing season. It is important to understand how the carbon dynamics of plants respond to O3 pollution in drier and N-enriched environments. Here we present the patterns of non-structural carbohydrates and its components (soluble sugar and starch) in the leaves and fine roots in poplar clone 546 (Populus deltoides cv. '55/56'×P. deltoides cv. 'Imperial') for one growing season at two O3 concentrations (control, charcoal-filtered air, and elevated O3, non-filtered air+40 nmol•mol-1of O3), two watering regimes (well-watered and reduced watering at 40% of well-watered irrigation), and two soil nitrogen addition treatments [no addition and the addition of 50 kg•(hm2•a)-1]. The results showed that O3 stress significantly increased the content of soluble sugar in leaves and starch in fine roots but decreased the content of starch and total non-structural carbohydrate (NSC) in leaves. Drought stress significantly reduced the content of starch and total NSC in leaves but increased the contents of soluble sugar and total NSC in fine roots. Nitrogen addition had no significant effect on NSC and its components in leaves and fine roots. NSC and its components in leaves and fine roots were positively correlated with photosynthetic rate and biomass. With an increase in the number of environmental stress factors, NSC in leaves showed a significant downward trend while NSC in fine roots showed a significant upward trend. The study demonstrates that environmental stress can promote the transformation of starch into soluble sugars in plant leaves and the transfer of NSC from leaves to roots for storage, which may be a coping strategy for plants exposed to environmental stress.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Plants (botany) Controlled terms:Air pollution - Carbohydrates - Charcoal - Cotton - Drought - Forestry - Nitrogen - Ozone - Starch Uncontrolled terms:Coping strategies - Enriched environments - Environmental stress - Ground-level ozone - Nitrogen additions - Non-structural carbohydrates - Photosynthetic rate - Populus deltoides Classification code:444 Water Resources - 451 Air Pollution - 524 Solid Fuels - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 4.00e+01% DOI:10.13227/j.hjkx.202007213 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804513 Title:Impact of Rainfall-Runoff Events on Methane Emission from Xiangxi Bay of the Three Gorges Reservoir Title of translation:降雨径流事件对三峡水库香溪河库湾甲烷释放的影响 Authors:Chen, Min (1, 2); Xu, Hao-Ting (1); Wang, Xue-Zhu (1); Xiao, Shang-Bin (1, 2) Author affiliation:(1) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Yichang; 443002, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:732-739 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Methane is an important greenhouse gas and whether reservoirs act as a source or sink of methane has attracted great attention worldwide. However, unrepresentative sampling periods and a lack of consideration of unfavorable weather conditions have limited the accurate estimation of CH4 emission from reservoirs. This study focused on the middle reach of Xiangxi Bay in the Three Gorges Reservoir to track an entire rainfall-runoff event via on-site measurements in the summer of 2019, and initiatively investigated the impact of rainfall and inflow processes on methane concentration and emission. Results showed that from before to after the rainfall event, methane flux at the air-water interface ranged between 0.011 and 0.326 mg•(m2•h)-1, indicating a net source of methane to the atmosphere. Both wind velocity and rainfall affected methane evasion from the surface by altering the gas transfer velocity, with the effect of wind being more prominent. Methane concentrations at the bottom layer significantly increased when rainfall-induced density flow from the watershed arrived at the sampling section. This was likely due to methane export from upstream and along the flow path. During this event, discharge was too small to destratify the water column, and methane was strongly oxidized as it diffused upwards, having little impact on surface methane concentrations and air-water methane flux.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Methane Controlled terms:Air - Greenhouse gases - Methanation - Phase interfaces - Rain - Runoff Uncontrolled terms:Accurate estimation - Air water interfaces - Impact on surfaces - Methane concentrations - Methane emissions - On-site measurement - Rainfall-runoff events - Three gorges reservoir Classification code:442.1 Flood Control - 443.3 Precipitation - 451.1 Air Pollution Sources - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202007063 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247504 Title:Activation of Permonosulfate by Rhodamine B for BPA Degradation Under Visible Light Irradiation Title of translation:可见光驱动下罗丹明B自活化过硫酸盐降解双酚A Authors:Zhang, Yi-Chen (1); Bai, Xue (1); Shi, Juan (1); Jin, Peng-Kang (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2353-2359 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Although the activation method of permonosulfate has been gradually developed, its practical application is severely restricted by the high cost and difficult recovery of the catalyst, thereby resulting in secondary pollution. In this study, the application potential of self-decolorization of dyes and degradation of other pollutants through persulfate(PS) activation was examined by building a self-decolorization system. The results showed that the dyes could activate PS under visible light irradiation, which could realize not only the self-decolorization of dyes, but also the degradation of other pollutants. The degradation rates of rhodamine B and bisphenol A could reach 80% and 90%, respectively. This process included both free radical reaction pathways and nonradical reaction pathways. The active oxidants produced in the system included superoxide radicals, sulfate radicals, hydroxyl radicals, and singlet oxygen. The self-decolorization efficiency of dyes was related to the type of dyes, initial concentration of the dyes, dosage of PS, and initial pH of the solution. Meanwhile, the initial concentrations of the dyes and other pollutants had a great influence on the degradation of other pollutants. This study provides a new idea for economic and environmental protection in the PS activation method, and has broad application prospects in the treatment of printing and dyeing wastewater.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Rhodamine B Controlled terms:Chemical activation - Degradation - Free radical reactions - Irradiation - Light - Photodegradation - Pollution - Reaction kinetics - Reactor cores - Secondary recovery - Sulfur compounds - Wastewater treatment Uncontrolled terms:Activation method - Broad application - Decolorization of dyes - Initial concentration - Printing and dyeing wastewaters - Secondary pollution - Superoxide radical - Visible-light irradiation Classification code:452.4 Industrial Wastes Treatment and Disposal - 511.1 Oil Field Production Operations - 741.1 Light/Optics - 802.2 Chemical Reactions Numerical data indexing:Percentage 8.00e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202010097 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247520 Title:Effects of Land Use Changes on Soil Fungal Community Structure and Function in the Riparian Wetland Along the Downstream of the Songhua River Title of translation:土地利用变化对松花江下游湿地土壤真菌群落结构及功能的影响 Authors:Xu, Fei (1, 2); Zhang, Tuo (1); Huai, Bao-Dong (2); Sui, Wen-Zhi (2); Yang, Xue (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, China West Normal University, Nanchong; 637002, China; (2) Heilongjiang Academy of Land Reclamation Sciences, Harbin; 150038, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2531-2540 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The aim of this study was to provide a reference for wetland resource management and ecological restoration by analyzing the influence of land use changes on the soil fungal community and its function and to identify the potential natural restoration ability of degraded riverside wetlands in the Songhua River. In July 2018, soil fungi in a natural wetland, paddy field, sand mining slash, and restoration wetland along the downstream of the Songhua River were amplified by PCR. PCR products were sequenced using the Illumina MiSeq PE300 high-throughput sequencing platform. The differences in the soil fungal community composition and function and its influencing factors were analyzed. The results showed that the α-diversity indexes of soil fungi were significantly reduced by sand mining or cultivation in the natural wetland (P<0.05). The ACE index and Chao1 index of soil fungi in the sand mining slash were significantly improved after the sand mining area was restored to a constructed wetland (P<0.05). There were significant differences in the soil fungal community structure between the paddy field and other land use types (P<0.05). The soil fungi in the riparian wetland could be divided into 16 phyla. Ascomycota, Basidiomycota, Mortierellomycota, and Rozellomycota were the dominant phyla (relative abundance>1%). Ectomycorrhizal was the main functional fungus in the natural wetland and restoration wetland with the supplementation of bryophyte parasites and lichen parasites. Litter saprotrophs and soil saprotrophs were the main functional groups of fungi in the paddy field and sand mining slash, and the relative abundances of animal pathogens and plant pathogens increased significantly in the paddy field. The diversity of the soil fungal community was significantly influenced by the soil pH, organic carbon, total nitrogen, and total phosphorus contents. Thus, resource development in the natural riparian wetlands reduced the ecosystem stability and increased the potential ecological risks.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Fungi Controlled terms:Ecosystems - Land use - Organic carbon - Restoration - Rivers - Sand - Soils - Wetlands Uncontrolled terms:Constructed wetlands - Ecological restoration - Ecosystem stability - High-throughput sequencing - Natural restoration - Potential ecological risk - Resource development - Soil fungal communities Classification code:403 Urban and Regional Planning and Development - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202008307 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126249 Title:Effects of Climate Warming on the Key Process and Index of Black Soil Carbon and Nitrogen Cycle During Freezing Period Title of translation:气候变暖对冻结期黑土碳氮循环关键过程及指标的影响 Authors:Wang, Zi-Long (1); Liu, Chuan-Xing (1); Jiang, Qiu-Xiang (1); Li, Shi-Qiang (2); Chai, Xun (3) Author affiliation:(1) College of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) Heilongjiang Hydrology and Water Resources Center, Harbin; 150001, China; (3) State Grid Heilongjiang Electric Power Company Limited Management Training Center, Harbin; 150030, China Corresponding author:Jiang, Qiu-Xiang(jiangqiuxiang2017@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1967-1978 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As an critical part of the global biogeochemical cycle, the winter soil carbon and nitrogen cycles are extremely sensitive to climate warming. Furthermore, the black soil in northeast China is fertile and rich in organic matter and is a vital production base of commodity grains in China. For as long as half a year, the black soil is in a freezing-thawing state. Climate warming will change the snow cover thickness and soil freezing degree on the surface of the black soil in the winter and affect the freezing-thawing cycle frequency and timing of the soil, thus exerting a profound influence on the fixation, transformation, and release of soil carbon and nitrogen during the freezing period and throughout the year. To better understand the effects of climate warming on the black soil carbon and nitrogen dynamics during the freezing period, an experiment was conducted with two warming levels (W1 and W2) using an infrared radiometer to simulate soil warming. The warming increased the surface soil temperature (0 cm soil temperature) by 1.54℃ (W1) and 4.10℃ (W2), respectively, and significantly increased the soil moisture content compared with the control (C) during the freezing period, most likely because of the melting snow. The snow cover thickness, soil freezing depth, soil organic carbon (SOC), and labile organic carbon (LC) content were reduced by both warming treatments. However, the effect of the temperature increase during the freezing period on the key processes and indicators of the nitrogen cycle in black soil was relatively more complicated. With the increase in temperature, the content of nitrate nitrogen (NO3--N) decreased significantly, and the content of total nitrogen (TN) and net nitrogen nitrification rate increased significantly, while the ammonium nitrogen (NH4+-N), total inorganic nitrogen (TIN) content, and the net nitrogen mineralization rate exhibited a significant increase first and then decreased. In summary, climate warming will bring a warmer and more humid environment to the black soil during the freezing period, and the resulting changes in the soil carbon and nitrogen content and transformation processes will have a profound impact on the structure, productivity of the plants and microbial communities, and carbon and nitrogen cycles in the subsequent growing season. The results provide a scientific basis for studying the carbon and nitrogen cycle mechanisms of the northeast black soil during the freezing period.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Nitrogen fixation Controlled terms:Biogeochemistry - Climate change - Freezing - Nitrogen - Organic carbon - Snow - Soil mechanics - Soil moisture - Temperature - Thawing Uncontrolled terms:Biogeochemical cycle - Freezing thawing cycles - Infra-red radiometers - Microbial communities - Nitrogen mineralization - Surface soil temperatures - Temperature increase - Transformation process Classification code:443.1 Atmospheric Properties - 443.3 Precipitation - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Size 0.00e+00m DOI:10.13227/j.hjkx.202007204 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247420 Title:Fe-Ti Co-Doped Alumina-Induced Surface Dual Reaction Center for Catalytic Ozonation to Remove Pollutants from Water Title of translation:铁钛共掺杂氧化铝诱发表面双反应中心催化臭氧化去除水中污染物 Authors:Zhang, Fan (1); Song, Yang (2); Hu, Chun (1, 3); Lyu, Lai (1) Author affiliation:(1) Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, Guangzhou University, Guangzhou; 510006, China; (2) Faculty of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou; 510006, China; (3) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Lyu, Lai(lyulai@gzhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2360-2369 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Multiphase catalytic ozone oxidation technology has received wide attention for its effectiveness in removing organic pollutants from water. However, the existence of a rate-limiting step in the metal oxide-catalyzed ozonation process based on single-site redox, which inhibits the activity, greatly limits the practical application of the multiphase catalytic ozonation technology. To solve this bottleneck problem, lattice doping of metal oxide γ-Al2O3 substrates with transition metal species Fe and Ti was used to prepare novel dual reaction center catalysts (FT-A-1 DRCs). Characterization of their morphological structures and chemical compositions was conducted by XRD, TEM, XPS, and other techniques, and it was demonstrated that the lattice substitution of Fe and Ti for Al resulted in the formation of surface-poor electron-rich microregions (electron-rich Fe microcenters and electron-deficient Ti microcenters). The FT-A-1 DRCs were used to catalyze the odor oxidation process and exhibited excellent activity and stability for the removal of a range of non-degradable organic pollutants, such as ibuprofen. The interfacial reaction mechanism was revealed using EPR and electrochemical techniques. It was found that in the catalytic odor oxidation process, O3/H2O was directionally reduced at the electron-rich microcenters to produce •OH, whereas the contaminants could be oxidized at the electron-deficient microcenters as electron donors to continuously supply electrons to the reaction system. This reaction process utilizes the pollutant's own energy to achieve two-way degradation of the pollutant (•OH attack and direct electron donor), thereby overcoming the rate-limiting step in the metal-oxide-catalyzed ozone oxidation process.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Organic pollutants Controlled terms:Air pollution - Alumina - Aluminum metallography - Aluminum oxide - Binary alloys - Catalysis - Catalytic oxidation - Cobalt alloys - Cobalt metallography - Electrons - Iron - Iron alloys - Iron metallography - Odor removal - Oxidation - Ozone - Ozone water treatment - Ozonization - Surface reactions - Titanium - Titanium alloys - Titanium metallography - Titanium oxides - Water pollution Uncontrolled terms:Bottleneck problem - Catalytic ozonation - Catalyzed ozonation - Chemical compositions - Electrochemical techniques - Lattice substitution - Morphological structures - Rate-limiting steps Classification code:451 Air Pollution - 453 Water Pollution - 531.2 Metallography - 542.3 Titanium and Alloys - 545.1 Iron - 545.2 Iron Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202009099 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126261 Title:Seasonal Effects of Influent Ammonia Oxidizing Bacteria of Municipal Wastewater Treatment Plants on Activated Sludge System Title of translation:城市污水处理厂进水氨氧化菌对活性污泥系统的季节性影响 Authors:Yu, Li-Fang (1, 2); Wang, Yu (1); Hua, Si-Si (1); Li, Ren (1); Zhang, Xing-Xiu (1); Hui, Xiao-Fei (1) Author affiliation:(1) School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1923-1929 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The specific ammonia uptake rates (SAUR) and ammonia oxidizing bacteria (AOB) community of influent sewage and activated sludge in the 2nd wastewater treatment plant (WWTP) of Xi'an without the primary settling tank were analyzed over multiple years to explore the seasonal effects of the influent AOB on the activated sludge systems. During the experiment, the SAUR of the raw sewage and activated sludge were 0.48-3.02 mg•(g•h)-1 and 0.68-2.25 mg•(g•h)-1, respectively. Meanwhile, the correlation analysis indicated that the monthly SAUR of the raw sewage was highly correlated with that of the activated sludge of the following month (r=0.862, P<0.05), which indicated that influent nitrifiers had a significant effect on the nitrification performance of activated sludge. Considering that the estimated AOB seeding intensities based on the ammonia oxidizing activity were 0.21-0.92 g•(g•d)-1, the nitrifier immigration from the raw sewage should added to the design of WWTP and the activated sludge modeling. Moreover, the qPCR results revealed that the AOB abundance of activated sludge in winter decreased but remained at 1010 cells•g-1, indicating that the immigration of influent nitrifiers could partially compensate for the reduction of the AOB abundance in the activated sludge caused by decreasing temperatures. Finally, the Illumina MiSeq sequencing demonstrated that the shared dominant AOB between the raw sewage and activated sludge were Nitrosomonas sp. Nm58, Nitrosomonas sp. JL21, and bacterium CYCU-0253. These findings can provide theoretical support for the design and operation of a WWTP.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Activated sludge process Controlled terms:Ammonia - Bacteria - Nitrification - Polymerase chain reaction - Sewage - Sewage pumping plants - Sewage treatment plants - Wastewater treatment - Water treatment plants Uncontrolled terms:Activated sludge model - Activated sludge systems - Ammonia oxidizing activity - Ammonia oxidizing bacteria - Design and operations - Municipal wastewater treatment plants - Nitrification performance - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202008075 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126230 Title:Characteristics and Meteorological Factors of Complex Nonattainment Pollution of Atmospheric Photochemical Oxidant (Ox) and PM2.5 in the Pearl River Delta Region, China Title of translation:珠江三角洲大气光化学氧化剂(Ox)与PM2.5复合超标污染特征及气象影响因素 Authors:Yan, Feng-Hua (1); Chen, Wei-Hua (1); Chang, Ming (1); Wang, Wei-Wen (1); Liu, Yong-Lin (1); Zhong, Bu-Qing (1); Mao, Jing-Ying (1); Yang, Tu-Shi (1); Wang, Xue-Mei (1); Liu, Chan-Fang (2) Author affiliation:(1) Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Institute for Environmental and Climate Research, Jinan University, Guangzhou; 510443, China; (2) Shenzhen Environmental Monitoring Center, Shenzhen; 518049, China Corresponding authors:Wang, Xue-Mei(eciwxm@jnu.edu.cn); Liu, Chan-Fang(99753846@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1600-1614 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the atmospheric pollutant data from twelve monitoring sites in the Guangdong-Hong Kong-Macao Pearl River Delta Regional Air Quality Monitoring Network, the mass concentration trends of atmospheric photochemical oxidants (Ox, NO2+O3) and PM2.5 during 2013-2017 were studied. The complex nonattainment pollution of Ox and PM2.5 is defined as the daily average mass concentration of NO2 and PM2.5 and daily maximum 8 h average (O3 MDA8) mass concentration of O3 simultaneously that exceeds the Chinese grade Ⅱ national air quality standard. The characteristics and meteorological factors that influence the complex nonattainment pollution of Ox and PM2.5 at different types of areas were analyzed. The results indicate that from 2013 to 2017, the annual average mass concentration of PM2.5 in the Pearl River Delta (PRD) region decreased from (44±7) μg•m-3 to (32±4) μg•m-3, which met the annual standard for three consecutive years. The annual average mass concentration of Ox decreased from (127±14) μg•m-3 in 2013 to (114±12) μg•m-3 in 2016 and then showed a general rebound trend to (129±13) μg•m-3 in 2017 when O3 concentrations increased significantly (10 μg•m-3). The proportion of pollution processes with O3 as the primary pollutant increased from 33% in 2013 to 78% in 2017, and the regional characteristics of simultaneous pollution in multiple cities have been highlighted. The complex nonattainment pollution of Ox and PM2.5 occurred 60 times during the study period, primarily in urban sites (78%) and suburban sites (22%). The largest number of days of complex nonattainment pollution occurred in autumn (52%) because of strong solar radiation that was conducive to ozone formation, and consequently, the high oxidization of the atmosphere promoted the secondary generation of PM2.5. The weather conditions that caused the complex nonattainment pollution in the PRD mainly include outflow-high-pressures (43%), subtropical-high-pressures(30%), and tropical-depressions (27%). In terms of specific meteorological conditions, when the temperature was in the range of 20-25℃ and relative humidity was in the range of 60%-75%, the proportion of complex nonattainment pollution was the highest (22%). When O3 pollution was substantial, the high relative humidity and low wind speed during the nighttime caused the concentration of NO2 and PM2.5 to rise significantly, and then the high temperatures during the day aggravated the complex nonattainment pollution.
© 2021, Science Press. All right reserved. Number of references:61 Main heading:River pollution Controlled terms:Air quality - Atmospheric humidity - Complex networks - Gems - Nitrogen oxides - Oxidants - Rivers - Tropics - Urban growth - Wind Uncontrolled terms:Atmospheric pollutants - High relative humidities - Meteorological condition - Meteorological factors - National Air Quality Standards - Pearl River Delta region - Photochemical oxidants - Regional characteristics Classification code:403.1 Urban Planning and Development - 443 Meteorology - 443.1 Atmospheric Properties - 451.2 Air Pollution Control - 453 Water Pollution - 482.2.1 Gems - 722 Computer Systems and Equipment - 803 Chemical Agents and Basic Industrial Chemicals - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.01e+03% to 7.80e+01%, Percentage 2.20e+01%, Percentage 2.70e+01%, Percentage 3.00e+01%, Percentage 3.30e+01%, Percentage 4.30e+01%, Percentage 5.20e+01%, Percentage 6.00e+01% to 7.50e+01%, Percentage 7.80e+01%, Time 2.88e+04s DOI:10.13227/j.hjkx.202007286 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710248398 Title:Analysis of Nitrogen Transformation Characteristics and Influencing Factors of Forestland Soil in the Qinghai-Tibet Plateau: A Case Study of the Qilian Mountains and Southeast Tibet Title of translation:青藏高原林地土壤的氮转化特征及其影响因素分析:以祁连山和藏东南地区为例 Authors:He, Fang (1, 2); Zhang, Li-Mei (2); Shen, Cong-Cong (2); Chen, Jin-Quan (3); Liu, Si-Yi (2) Author affiliation:(1) Institute of International Rivers and Eco-Security, Yunnan University, Kunming; 650000, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) School of Ecology and Environmental Science, Yunnan University, Kunming; 650000, China Corresponding author:Liu, Si-Yi(syliu@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2449-2456 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Mineralization and nitrification, two important processes of the N cycle in forest ecosystems, play an important role in the maintenance of ecosystem function and soil environmental quality. The net mineralization rate and net nitrification rate are two common indexes for evaluation of the N supply and N loss risk in soil. In order to study the soil N transformation characteristics and their influencing factors in woodlands of the Qinghai-Tibet Plateau, the inorganic N concentrations, net N mineralization rates, and net nitrification rates of 327 soils sampled from the Qilian Mountains and Southeast Tibet were analyzed using indoor incubation experiments. The results showed that the inorganic N concentration, net N mineralization rate, and net nitrification rate of the woodland soil in Southeast Tibet [109.70 mg•kg-1, 3.08 mg•(kg•d)-1, and 2.19 mg•(kg•d)-1] were significantly higher than those in the Qilian Mountains [49.47 mg•kg-1, 0.70 mg•(kg•d)-1, and 0.69 mg•(kg•d)-1]. The net mineralization rate of soil was positively correlated with the mean annual temperature (MAT), mean annual precipitation (MAP), moisture index, and soil organic matter concentrations (P<0.001). There were no significant positive relationships between the net nitrification rate and the MAT and MAP, but the net nitrification rate was positively correlated with the net N mineralization rate (P<0.001). These results indicated that the N supply ability of woodland soil in Southeast Tibet is significantly higher than that in the Qilian Mountains, and the hydrothermal conditions (MAT and MAP) are likely responsible for the difference in the net mineralization rate between the two studied regions. The net mineralization rate is the limiting factor for the net nitrification rate, which has an important influence on the spatial distribution of the forest soil nitrification process in the Qinghai-Tibet Plateau. These results emphasize the important roles of climatic and environmental factors, such as hydrothermal conditions, on the net N mineralization and nitrification rates of woodland soil in the Qinghai-Tibet Plateau, and will further deepen the understanding of the law of soil N transformation in woodlands in the Qinghai-Tibet Plateau.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Soils Controlled terms:Ecosystems - Environmental regulations - Forestry - Landforms - Mineralogy - Nitrification - Nitrogen Uncontrolled terms:Environmental factors - Environmental quality - Hydrothermal conditions - Mean annual precipitation - Mean annual temperatures - Nitrification process - Nitrogen transformations - Qinghai Tibet plateau Classification code:454.2 Environmental Impact and Protection - 454.3 Ecology and Ecosystems - 481.1 Geology - 482 Mineralogy - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202010076 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710248392 Title:Characteristics of Paddy Soil Organic Carbon Mineralization and Influencing Factors Under Different Water Conditions and Microbial Biomass Levels Title of translation:不同水分条件和微生物生物量水平下水稻土有机碳矿化及其影响因子特征 Authors:Liu, Qi (1, 2); Li, Yu-Hong (1); Li, Zhe (1, 2); Wei, Xiao-Meng (1); Zhu, Zhen-Ke (1); Wu, Jin-Shui (1, 2); Ge, Ti-Da (1, 2) Author affiliation:(1) Key Laboratory of Subtropical Agriculture Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Li, Yu-Hong(yuhong_li@isa.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2440-2448 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Paddy soil often undergoes frequent dry-wet alternation. The change in water status not only affects the physical and chemical properties of the soil, but also changes the structure and diversity of the soil microbial communities, which in turn determines the rate of soil organic carbon mineralization. However, the effects of different water conditions and soil microbial biomass levels on the process of soil organic carbon mineralization and its mechanisms are still unclear. Therefore, this study took typical subtropical paddy soil as the research object, applied a laboratory incubation experiment with two water treatments of dry-wet and continuous flooding, and reduced the soil microbial biomass through chloroform fumigation, thereby obtaining high and low soil microbial biomass carbon contents, to elucidate the influencing mechanisms of microbial biomass and water conditions on organic carbon mineralization in paddy soil. The results showed that during the first 30 d of incubation, the dry-wet treatment was in a non-flooded stage and its cumulative CO2 emissions were significantly lower than those of the continuous flooded treatment. After 30 d, the dry-wet treatment entered the flooded stage. The difference in the cumulative CO2 emissions of the soils with a high microbial biomass carbon content between the dry-wet and continuous flooding treatments gradually decreased, and there was no significant difference on day 78. In the soil with a low microbial biomass carbon content, the cumulative CO2 emissions of the dry-wet treatment on day 78 was still significantly lower than that of the continuous flooded treatment. The soils with a low microbial biomass carbon content showed a faster CO2 emission rate at the beginning of the incubation period (first 20 d), which was 1.1-6.1 times greater than that of the high microbial biomass carbon soils owing to their high soil dissolved organic carbon (DOC) content, and the CO2 emission rate then gradually decreased until it was below that of the soil with a high microbial biomass carbon content. The soil organic carbon mineralization rate became stable later in the incubation period (days 45-78). The stable mineralization rate of the high microbial biomass carbon soil was 20%-30% higher than that of the low microbial biomass carbon soil. The multiple regression analysis results showed that the decrease in the soil DOC content (ΔDOC) and the increase in the Fe2+ content (ΔFe2+) significantly affected the change in cumulative CO2 emissions (ΔCO2) under continuous flooding conditions, but had no effect on ΔCO2 during the flooding stage of the dry-wet treatment. The correlation analysis showed that the daily CO2 emission rate of soils with high microbial biomass carbon was significantly positively correlated with glucosidase activity under dry-wet treatment and significantly negatively correlated with acetylglucosaminidase (NAG) and peroxidase activities under continuous flooding treatment. In the low microbial biomass carbon soils, the daily CO2 emission rate of the continuous flooding treatment was negatively correlated with the NAG activity, but showed no correlation with enzyme activities under dry-wet management. In summary, the cumulative CO2 emissions of dry-wet treatment were lower than those of continuous flooding treatment, and the difference was significant in soils with low microbial biomass carbon. The size of the soil microbial biomass determined the level of the stable soil organic carbon mineralization rate. The amount of soluble organic carbon and iron reduction affected the soil CO2 emissions under continuous flooding conditions, and the soil water conditions affected the daily CO2 emission rate and its key influencing enzymes. This study provides data and theoretical support for the carbon cycle and carbon sequestration potential in paddy soil.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Organic carbon Controlled terms:Biomass - Carbon dioxide - Chlorine compounds - Enzymes - Floods - Mineralogy - Plants (botany) - Soil moisture Uncontrolled terms:Carbon sequestration potential - Dissolved organic carbon - Influencing mechanisms - Microbial biomass carbon - Multiple regression analysis - Physical and chemical properties - Soil microbial biomass carbons - Soil microbial community Classification code:482 Mineralogy - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.00e+01% to 3.00e+01% DOI:10.13227/j.hjkx.202010105 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404777 Title:Economic Benefit of Air Quality Improvement During Implementation of the Air Pollution Prevention and Control Action Plan in Beijing Title of translation:北京市"大气十条"实施的空气质量改善效益 Authors:Lu, Ya-Ling (1, 2); Fan, Zhao-Yang (3); Jiang, Hong-Qiang (1); Niu, Chuan-Zhen (4); Li, Bo (1) Author affiliation:(1) Environmental Research Center of Beijing-Tianjin-Hebei Region, Chinese Academy of Environmental Planning, Beijing; 100012, China; (2) School of Environmental Science and Engineering, Tianjin University, Tianjin; 300072, China; (3) College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China; (4) College of Environment, Zhejiang University of Technology, Hangzhou; 310014, China Corresponding author:Li, Bo(libo@caep.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2730-2739 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Air quality in Beijing has been improved significantly since the implementation of the Air Pollution Prevention and Control Action Plan ('Action Plan'). To evaluate the effect of the Action Plan, the cost-of-illness, human capital, and market value approaches were used to estimate air quality improvement benefits including human health, agriculture, building materials, and cleanliness. The policy benefit through monetization was also evaluated, which can affirm the positive effect of air pollution prevention and control by local government. The results illustrated that: ① Since the policy implementation, air quality in Beijing has improved significantly and the improvement efficiency had been growing steadily. From 2013 to 2017, air quality had reached -1.982, -1.893, 15.707, 15.264, and 22.330 billion yuan respectively, accounting for -0.85‰, -0.81‰, 6.68‰, 6.16‰, and 8.77‰ of GDP in the fiscal year. The total profit during the five years was 49.426 billion yuan, accounting for 4.11‰ of the 5-year total GDP; ② The total improvement benefit was mainly linked to reductions in health and cleaning costs, primarily associated with a reduction in particulate matter concentrations; and ③ The majority of 16 administrative regions in Beijing reached an ideal level of benefit during the late stages of policy implementation, including Yanqing, Miyun, Pinggu, Changping, Tongzhou, Shijingshan, and Chaoyang Districts, which have retained a positive improvement index for five years. In contrast, Chaoyang and Haidian Districts have benefited relatively little as a result of the exposure of high-density populations to atmospheric pollution. These research results demonstrate the effectiveness and necessity of the Air Pollution Prevention and Control Action Plan in Beijing.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Air pollution control Controlled terms:Agricultural robots - Air quality - Cleaning - Cost benefit analysis - Environmental protection - Quality control Uncontrolled terms:Air pollution prevention - Air quality improvement - Atmospheric pollution - Economic benefits - Local government - Particulate Matter - Policy implementations - Research results Classification code:451.2 Air Pollution Control - 454.2 Environmental Impact and Protection - 802.3 Chemical Operations - 911 Cost and Value Engineering; Industrial Economics - 913.3 Quality Assurance and Control Numerical data indexing:Age 5.00e+00yr DOI:10.13227/j.hjkx.202008298 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404751 Title:Interaction and Mechanism Between Conditioning Agents and Two Elements in the Soil Enriched with Phosphorus and Cadmium Title of translation:调理剂对磷镉富集土壤中两种元素交互作用的影响 Authors:Huang, Yang (1); Hu, Xue-Yu (1); Cao, Kun-Kun (1); Zhang, Min (1); Hu, Xiao-Xiao (1); Wang, Zi-Jin (1) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China Corresponding author:Hu, Xue-Yu(huxueyu@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3028-3036 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Focusing on agricultural soil enriched in phosphorus and cadmium (total Cd=0.94 mg•kg-1 and total P=0.86g•kg-1), indoor cultivation experiments were conducted according to the length of the middle rice growth period and the following crop planting period in Hubei. The bioavailability of soil phosphorus and cadmium were examined along with their morphological changes and coupling effect under the influence of material biochar (BC), calcium magnesium phosphate fertilizer (CMP), and fly ash (FA). The results showed that: ① When cultured for 140 days, the content of available phosphorus in the soil treated with the conditioning agents was significantly increased compared with the control soil, available phosphorus reached 22.47-37.81mg•kg-1, and the optimal growth requirements of rice were met without additional application of phosphate fertilizer, and adding BC had the best effect. ② The phosphorus in the test soil is mainly inorganic orthophosphate, and the content of different forms of inorganic phosphorus increased under the action of the conditioning agents. The fixed O-P and Ca10-P in the soil gradually changed to more active forms (Ca2-P, Ca8-P, Al-P and Fe-P) over time. ③ The effective Cd content of the soil treated with the conditioning agents was significantly reduced by 8.74%-17.48% relative to the control treatment, which was mainly related to the effect of the three conditioning agents on soil pH. At the same time, compared with the control, the addition of a conditioning agent significantly reduced the exchangeable Cd, and the carbonate-bound Cd and the residual Cd were increased. The abundance of active groups at the surface is related to the adsorption and chelation of Cd2+. The results showed that the three conditioners have the dual functions of phosphorus activation and cadmium passivation in phosphorus-and cadmium-enriched soil, and the effect of biomass carbon and calcium magnesium phosphate fertilizer was greatest, which persisted across the entire rice growth period to the sowing date of the next crop.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Soil conditioners Controlled terms:Agricultural robots - Aluminum compounds - Biochemistry - Calcium phosphate - Crops - Cultivation - Fly ash - Iron compounds - Magnesium compounds - Phosphate fertilizers - Phosphates - Phosphorus - Soils Uncontrolled terms:Agricultural soils - Available phosphorus - Control treatments - Coupling effect - Inorganic phosphorus - Morphological changes - Planting period - Soil phosphorus Classification code:483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Age 3.84e-01yr, Percentage 8.74e+00% to 1.75e+01% DOI:10.13227/j.hjkx.202010040 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003379 Title:Emission Inventory of Air pollutants for the Harmless Treatment of Municipal Solid Waste Title of translation:生活垃圾无害化处理大气污染物排放清单 Authors:Ma, Zhan-Yun (1); Jiang, Yu-Cong (2); Ren, Jia-Xue (2); Zhang, Yang (3); Feng, Peng (4); Gao, Qing-Xian (1); Meng, Dan (2) Author affiliation:(1) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (3) Dalian Ecological and Environmental Affairs Service Center, Dalian; 116000, China; (4) China Center for Resource Satellite Data and Applications, Beijing; 100094, China Corresponding author:Gao, Qing-Xian(gaoqx@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1333-1342 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to comprehensively assess the emission status of air pollutes from domestic waste treatment plants in mainland China, the basic statistical information of 31 provinces and cities in China was systematically collected and collated. The emission factor method was adopted to establish the 2016 list of air pollutants for the harmless treatment of domestic garbage in mainland China. The results showed that in 2016, the total amount of CH4, VOCs, NH3, TSP, PM10, and PM2.5 gaseous pollutants discharged from domestic waste landfills was 3 472 084.50, 185 117.10, 66.45, 54.94, 25.99, and 3.92 t, respectively. The total amount of CH4, SO2, NOx, NH3, VOCs, CO, TSP, PM10, PM2.5, and BC of gaseous pollutants discharged from incineration facilities was 25 389.10, 6 419.30, 70 923.84, 221.36, 435.33, 3 025.19, 221.36, 221.36, 2.21, and 2.86 t, respectively. Through the analysis of solid waste treatment sources, partial, and temporal distribution characteristics of air pollutants, and the proportion of incineration plants in the provinces and municipalities to the number of household harmless waste treatment plants, it was determined that the total amount of gaseous pollutants discharged from domestic waste incineration sources and landfill sources had an upward trend during the period 2010-2016. In 2016, domestic landfill treatment was the most important waste treatment method in China, and mainly concentrated in areas with moderate population density and large land resources, such as central and western regions. Domestic waste incineration treatment facilities are mainly concentrated in developed cities in the Yangtze River Delta, Pearl River Delta, and the Beijing-Tianjin-Hebei Region.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Waste incineration Controlled terms:Air pollution - Ammonia - Fog - Land fill - Municipal solid waste - Population statistics - Sulfur dioxide - Waste treatment Uncontrolled terms:Beijing-tianjin-hebei regions - Emission inventories - Harmless treatments - Population densities - Statistical information - Temporal distribution - Waste treatment plant - Yangtze river delta Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 452.4 Industrial Wastes Treatment and Disposal - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202006177 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404481 Title:Coadsorption of Heavy Metal and Antibiotic onto Humic Acid from Polder River Sediment Title of translation:圩区河道底泥腐殖酸对重金属和抗生素的共吸附 Authors:Xue, Xiang-Dong (1); Yang, Chen-Hao (1); Yu, Jian-Lin (1); Zhuang, Hai-Feng (1); Fang, Chen-Ran (2) Author affiliation:(1) School of Civil Engineering and Architectural, Zhejiang University of Science and Technology, Hangzhou; 310023, China; (2) College of Civil Engineering, Zhejiang University of Technology, Hangzhou; 310023, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2856-2867 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To clarify the interactions between heavy metals, antibiotics, and humic acid, copper (Cu2+), oxytetracycline (OTC), norfloxacin (NOR), and humic acid samples from river sediment in the Polder area were selected to build single and coexisting systems. Groups of experiments were designed to investigate the kinetics, thermodynamics, and isotherms of Cu2+, OTC, and NOR adsorption onto humic acid in single and Cu2++OTC and Cu2++NOR coexisting systems (concentration ratio=1:1). The physicochemical properties of humic acid were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), BET tests, and IR spectroscopy, and the possible adsorption mechanisms are discussed. The results showed that the humic acid was a typical amorphous material with a negative charge and non-uniform porous structure, and the pore size was at the mesoporous scale. In the single systems, the saturated adsorption capacity (qm) of Cu2+, OTC, and NOR onto humic acid was 33.043, 19.512, and 26.676 mg•g-1, respectively. In the Cu2++OTC system, the qm of Cu2+ and OTC was 38.053 and 25.965 mg•g-1, respectively. In the Cu2++NOR system, the qm of Cu2+ and NOR was 39.187 and 32.728 mg•g-1, respectively. The adsorption behaviors in the single and coexisting systems were similar and the adsorption processes were well fitted by the pseudo-second-order kinetic equation; the Sips model provided good descriptions for the isothermal adsorption equilibrium. Moreover, adsorption thermodynamics were characterized by spontaneous endothermic reactions with the reduction of free energy and the increase of enthalpy and entropy. It can be concluded that Cu2+ combines with OTC and NOR to form complexes, which increases the number of species available for adsorption by humic acid. Also, adsorbed Cu2+ can combine with free OTC and NOR in a bridging manner. Thus, a more favorable adsorption situation occurred in the coexisting systems. The IR characteristics of the carboxyl, phenolic hydroxyl, ketone, and aldehyde groups of humic acid changed by different degrees after adsorption, indicating that oxygen-containing functional groups generally participated in the adsorption reactions.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Adsorption Controlled terms:Amorphous materials - Antibiotics - Free energy - Heavy metals - Integral equations - Isotherms - Ketones - Organic acids - Physicochemical properties - Pore size - River pollution - Scanning electron microscopy Uncontrolled terms:Adsorption mechanism - Adsorption thermodynamics - Endothermic reactions - Isothermal adsorption - Oxygen-containing functional groups - Oxytetracyclines (OTC) - Pseudo second order kinetics - Saturated adsorption capacity Classification code:453 Water Pollution - 461.6 Medicine and Pharmacology - 531 Metallurgy and Metallography - 641.1 Thermodynamics - 802.3 Chemical Operations - 804.1 Organic Compounds - 921.2 Calculus - 933.2 Amorphous Solids - 951 Materials Science DOI:10.13227/j.hjkx.202010152 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003409 Title:Pollutant Removal Efficiency of Different Units Along a Mature Landfill Leachate Treatment Process in a Membrane Biological Reactor-Nanofiltration Combined Facility Title of translation:工程规模长填龄渗滤液膜生物-纳滤组合设施各单元污染物去除效能 Authors:Shao, Li-Ming (1, 2); Deng, Ying-Tao (1, 2); Qiu, Jun-Jie (1, 2); Lü, Fan (1, 2); Zhang, Hua (1, 2); He, Pin-Jing (1, 2) Author affiliation:(1) Shanghai Institute of Pollution Control and Ecological Security, Shanghai; 200092, China; (2) Institute of Waste Treatment and Reclamation, Tongji University, Shanghai; 200092, China Corresponding author:He, Pin-Jing(solidwaste@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1469-1476 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Properties of landfill leachate are complex. Therefore, leachate should be treated by combined processes with both biological and advanced methods. Due to the shortage of engineering-scale assessment data about the pollutant treatment contribution of individual process units, existing optimization methods still lack theoretical support. Here, a membrane biological reactor (MBR)+nanofiltration (NF) system with a capacity of 800 m3•d-1 was examined. Conventional physiochemical parameters and fluorescent parameters were examined to analyze the contribution of each process unit to treating mature landfill leachate. Furthermore, the transformation of dissolved organic matter (DOM) was evaluated using excitation emission matrix fluorescence spectroscopy-parallel factor (EEMs-PARAFAC). Results showed that the biological treatment removed soluble nitrogen (dissolved nitrogen, DN) by 74.7%, 54.6% occurred in the first-stage denitrification unit. The external ultrafiltration unit reduced dissolved chemical oxygen demand (COD) and dissolved organic carbon (DOC) by 92.2% and 93.3%, respectively. The nanofiltration unit effectively removed heavy metals and salts. Based on the tracking of DOM using fluorescent parameters, the first-stage denitrification unit was found to remove 75.4% of protein-like substances. The ultrafiltration unit mainly retained DOM with high hydrophilicity, while humus with high aromaticity was mainly retained by nanofiltration. The higher the degree of humification, the better the interception effect that was obtained. This indicates that biological treatment using the MBR process can be simplified, and ultrafiltration should prove reliable at preventing clogging during the treatment of mature landfill leachate.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Leachate treatment Controlled terms:Biochemical engineering - Chemical oxygen demand - Denitrification - Dissolution - Dissolved oxygen - Fluorescence - Fluorescence spectroscopy - Heavy metals - Linear transformations - Nanofiltration - Nitrogen - Organic carbon - Pollution - Soils - Stages - Ultrafiltration Uncontrolled terms:Biological treatment - Dissolved organic carbon - Dissolved organic matters - Excitation-emission matrix fluorescence spectroscopies - Landfill leachate treatment - Membrane biological reactors - Physiochemical parameters - Pollutant removal efficiency Classification code:402.2 Public Buildings - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 805.1.1 Biochemical Engineering - 921.3 Mathematical Transformations Numerical data indexing:Percentage 5.46e+01%, Percentage 7.47e+01%, Percentage 7.54e+01%, Percentage 9.22e+01%, Percentage 9.33e+01% DOI:10.13227/j.hjkx.202007263 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779815 Title:Characteristics of Modified Biochars and Their Immobilization Effect on Cu and Cd in Polluted Farmland Soil Around Smelter Title of translation:改性生物炭特性表征及对冶炼厂周边农田土壤铜镉形态的影响 Authors:Wang, Xin-Yu (1, 2); Meng, Hai-Bo (1, 2); Shen, Yu-Jun (1, 2); Wang, Jia-Rui (1, 2); Zhang, Xi (1, 2); Ding, Jing-Tao (1, 2); Zhou, Hai-Bin (1, 2); Li, Chun-Yan (1, 2); Cheng, Qiong-Yi (1, 2) Author affiliation:(1) Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing; 100125, China; (2) Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing; 100125, China Corresponding author:Zhang, Xi(Sunnyx321@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4441-4451 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Heavy metals in farmland soil are one of the most hazardous pollutants in the environment, owing to their universality and irreversibility. Modified biochar has been widely used in the adsorption and immobilization of heavy metals in soil, and its applicability is mainly determined by the types of heavy metals, pollution levels, and soil environmental conditions. Soil pollution is gradually becoming more complex and diversified, and heavy metal pollutants mostly occur in the form of compound pollution. However, most studies have focused on single heavy metal pollutant or the addition of heavy metal to soil. This study used rice straw as a raw material to prepare biochar, and modified it with K3PO4, KMnO4, and NaOH. The physicochemical and structural characteristics of the modified biochars were detected using a BET accelerated surface area and porosimetry system, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and the biochars were then analyzed for the availability and forms of Cd and Cu in soils contaminated with heavy metals in the mining area. The results showed that the surface roughness of the modified biochar increased to different degrees with increases in specific surface area and pore volume, with the NaOH modified biochar showing the most significant increases from 4.96 m2•g-1 to 60.79 m2•g-1, and from 0.02 cm3•g-1 to 0.12 cm3•g-1, respectively. The pore diameter changed in the opposite direction. The absorption peaks of the functional groups of the modified biochar were all changed, with K3PO4 modified biochar exhibiting the greatest degree of change. The addition of biochar significantly improved the soil pH value (P< 0.05), and the pH value of the soil treated with K3PO4 modified biochar exhibited the largest increase. With an application of 20.5% K3PO4 modified biochar, the availability of Cu and Cd in the soil was significantly reduced, by 75.44% and 67.70%, respectively. The immobilization efficiency of Cu was much higher than that of Cd. The best immobilization efficiency of Cu and Cd in soil was achieved with K3PO4 modified biochar. With an addition of 2% K3PO4 modified biochar, the immobilization efficiency of Cu and Cd was 61.06% and 4.12%, respectively. In summary, K3PO4 modified biochar had a better immobilization effect on both Cu and Cd in compound contaminated soil.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Soil pollution Controlled terms:Cadmium compounds - Cadmium metallography - Copper compounds - Copper metallography - Efficiency - Farms - Fourier transform infrared spectroscopy - Heavy metals - pH - Potash - Scanning electron microscopy - Smelting - Sodium hydroxide - Soils - Structural metals - Surface roughness Uncontrolled terms:Environmental conditions - Fourier transform infra red (FTIR) spectroscopy - Hazardous pollutants - Heavy metal pollutants - Heavy metals in soil - Immobilization effects - Immobilization efficiency - Structural characteristics Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 531.2 Metallography - 533.2 Metal Refining - 801 Chemistry - 801.1 Chemistry, General - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.1 Production Engineering - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Percentage 4.12e+00%, Percentage 6.11e+01%, Percentage 6.77e+01%, Percentage 7.54e+01%, Specific_Surface_Area 4.96e+03m2/kg to 6.08e+04m2/kg, Specific_Volume 2.00e-05m3/kg to 1.20e-04m3/kg DOI:10.13227/j.hjkx.202101180 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003294 Title:Uptake and Accumulation of Cadmium and Zinc by Two Energy Grasses: A Field Experiment Title of translation:两种能源草田间条件下对镉和锌的吸收累积 Authors:Zheng, Rui-Lun (1); Shi, Dong (1); Liu, Wen-Ju (2); Sun, Guo-Xin (3); Hou, Xin-Cun (1); Hu, Yan-Xia (1); Zhu, Yi (1); Wu, Ju-Ying (1) Author affiliation:(1) Beijing Research & Development Center for Grasses and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing; 100097, China; (2) College of Resources and Environment Science, Hebei Agricultural University, Baoding; 071001, China; (3) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Wu, Ju-Ying(wujuying@grass-env.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1158-1165 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The remediation potential of large biomass energy grasses in cadmium-contaminated soil remains ambiguous. A field experiment was carried out in a cadmium-contaminated farmland using two energy grasses and two control plants. The two energy grasses were hybrid pennisetum (Pennisetum americanum×P. purpureum, PAP) and purple elephant grass (P. purpureum 'Purple', PPP), and the two control plants were Iris lactea var. chinensis (ILC) and a cadmium hyperaccumulator, Noccaea caerulescens (NC). The results showed that the aboveground biomass of PAP was the largest among the four plants, and 126 and 36 times that of NC and ILC, respectively, but no significant difference with that of PPP. The concentrations of cadmium and zinc in the shoots and roots of NC were significantly higher than in the other plants. Zinc concentrations in the shoots and roots of ILC were lower than in the other plants, while cadmium concentrations were significantly higher than in PAP and PPP (P<0.05). The amounts of cadmium and zinc accumulated in the shoots of PPP were the highest among the four plants, while cadmium concentrations in the shoots and roots of PPP were significantly lower than in ILC and NC (P<0.05). Cadmium amounts accumulated in PPP shoots were 7.0 and 4.1 times that of ILC and NC, respectively. Zinc amounts accumulated in PPP shoots were 41 and 11 times that of ILC and NC, respectively (P<0.05). Cadmium accumulation in the shoots of PAP was 19.4% lower than in PPP, and zinc accumulation had no significant difference with that of PPP. NC, having a bioconcentration factor of shoot (BCFS) and a translocation factor (TF) for cadmium and zinc both larger than 1, is usable for phytoextraction of soils contaminated by cadmium and zinc. ILC, having a bioconcentration factor of root (BCFR) larger than 1 and a TF lower than 1 for cadmium, is usable for the phytostabilization of soils contaminated by cadmium. PPP, having a BCFR larger than 1 and a TF lower than 1 for zinc, can be used in the phytostabilization of soils contaminated by zinc. Under field conditions, PPP and PAP showed great potential for the extraction and removal of cadmium and zinc from soil due to their large biomass and ability to produce economic benefits, have good application prospects.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Cadmium Controlled terms:Bioaccumulation - Biomass - Contamination - Remediation - Soil pollution - Soil pollution control - Soils - Two term control systems - Zinc Uncontrolled terms:Above ground biomass - Application prospect - Bio-concentration factors - Pennisetum americanum - Phytostabilization - Translocation factor - Uptake and accumulations - Zinc concentration Classification code:454.2 Environmental Impact and Protection - 461.9 Biology - 483.1 Soils and Soil Mechanics - 546.3 Zinc and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 731.1 Control Systems Numerical data indexing:Percentage 1.94e+01% DOI:10.13227/j.hjkx.202008291 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126247 Title:Chemical Composition and Source Analysis of PM2.5 in Yuncheng, Shanxi Province in Autumn and Winter Title of translation:运城秋冬季大气细粒子化学组成特征及来源解析 Authors:Zhao, Qing (1); Li, Xing-Ru (2); Wang, Guo-Xuan (3); Zhang, Lan (2); Yang, Yang (2); Liu, Shui-Qiao (1); Sun, Ning-Ning (2); Huang, Yu (1); Lei, Wen-Kai (1); Liu, Xin-Gang (4) Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Department of Chemistry, Capital Normal University, Beijing; 100048, China; (3) Yuncheng Ecological Environment Monitoring Center, Shanxi Province, Yuncheng; 044000, China; (4) School of Environment, Beijing Normal University, Beijing; 100875, China Corresponding authors:Li, Xing-Ru(lixr@cnu.edu.cn); Liu, Xin-Gang(lxgstar@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1626-1635 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to reveal the chemical composition characteristics and pollution sources of fine particulate matter (PM2.5) in autumn and winter in Yuncheng, PM2.5 samples were continuously collected using a four-channel small-flow particulate sampler from October 15, 2018 to March 15, 2019. The study prediminantly analyzed the chemical components of water-soluble ions, elemental carbon, organic carbon, and metal elements. Additionally, the chemical mass reconstruction method of particulate matter and the positive matrix factorization model (PMF) were combined for an in-depth discussion. During the sample period, the PM2.5mass concentrations range was 29.37-370.11 μg•m-3, and 101 days during the sampling period exhibited concentrations that were higher than the secondary standard in China's Ambient Air Quality Standards (GB 3095-2012), with an exceeding rate of 70.63%. These results indicate that the air pollution in Yuncheng in autumn and winter is serious. According to the air quality index (AQI), the collected samples are classified as clean, light-moderate pollution, and heavy-severe pollution. Water-soluble ions, OC, EC and metal elements account for 40%, 19%, 5%, and 7% on clean days, 46%, 18%, 4%, and 5% on days with light-moderate pollution, and 46%, 21%, 4%, and 4% on days with heavy-severe pollution, respectively. Secondary ions NO3-, SO42-, and NH4+ are the primary components of water-soluble ions, accounting for 81% (clean days), 87% (light-moderate pollution), and 87% (heavy-severe pollution) of the total ion concentration, respectively. The OC/EC ratios during the sampling period were 3.78 (clean days), 4.02 (light-moderate pollution), and 5.37 (heavy-severe pollution). With the intensification of pollution, the pollution of secondary organic aerosols in the atmosphere becomes increasingly serious. In addition, as the air pollution increased, the concentration of Fe and Cr elements gradually decreased, while the concentration of other metal elements showed an overall upward trend. The results of the chemical mass reconstruction demonstrate that among the different pollution levels of atmospheric PM2.5 in Yuncheng, the mass percentages of secondary inorganic salt, sea salt, heavy metals, mineral dust, construction dust, organic matter, and elemental carbon were 36%, 2%, 2%, 8%, 1%, 33%, and 5% (clean days), 41%, 1%, 1%, 5%, 0.01%, 31%, and 5% (light-moderate pollution), and 41%, 1%, 1%, 4%, 0.004%, 34%, and 4% (heavy-severe pollution). The proportion of secondary inorganic ions increased and mineral dust decreased with the deterioration of air quality. The PMF analysis results suggest that secondary related sources, coal combustion sources, vehicle exhaust sources, biomass burning, and secondary organic matter are the predominant sources of PM2.5 during serious air pollution in Yuncheng.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Air quality Controlled terms:Air quality standards - Biogeochemistry - Chemical analysis - Coal combustion - Deterioration - Dust - Factorization - Heavy metals - Ions - Organic carbon - Particles (particulate matter) - Water pollution Uncontrolled terms:Air quality indices - Ambient air quality standards - Chemical compositions - Concentration of fe - Fine particulate matter (PM2.5) - Positive matrix factorization models - Reconstruction method - Secondary organic aerosols Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 453 Water Pollution - 481.2 Geochemistry - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 531 Metallurgy and Metallography - 804.1 Organic Compounds - 902.2 Codes and Standards - 921 Mathematics - 951 Materials Science Numerical data indexing:Age 2.77e-01yr, Percentage 1.00e+00%, Percentage 1.00e-02%, Percentage 1.80e+01%, Percentage 1.90e+01%, Percentage 2.00e+00%, Percentage 2.10e+01%, Percentage 3.10e+01%, Percentage 3.30e+01%, Percentage 3.40e+01%, Percentage 3.60e+01%, Percentage 4.00e+00%, Percentage 4.00e+01%, Percentage 4.00e-03%, Percentage 4.10e+01%, Percentage 4.60e+01%, Percentage 5.00e+00%, Percentage 7.00e+00%, Percentage 7.06e+01%, Percentage 8.00e+00%, Percentage 8.10e+01%, Percentage 8.70e+01% DOI:10.13227/j.hjkx.202008304 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582328 Title:Distribution of Heavy Metals and Their Corresponding Nanoparticles in Different Treatment Unit Processes in the Sewage Treatment Plant Title of translation:污水处理厂不同单元工艺水中重金属及其纳米颗粒的分布 Authors:Wang, Du-Jia (1, 2); He, Shuai (2); Zhou, Xiao-Xia (2) Author affiliation:(1) School of Environmental Science and Engineering, Shandong University, Qingdao; 266237, China; (2) Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou; 510006, China Corresponding author:Zhou, Xiao-Xia(xiaoxiazhou89@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3358-3365 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Total heavy metal concentration, heavy metal nanoparticle concentration, particle size, and the removal effect of different treatment unit processes on heavy metals and heavy metal nanoparticles were analyzed in this study. Inductively coupled plasma mass spectrometry (ICP-MS) and single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) were applied in nine treatment units performing continuous wastewater treatment processes in the Chengdu Shuangliu International Airport sewage treatment plant. Results showed that different treatment unit processes had different effects on the removal of different total heavy metal elements, with the effects on Fe being the most significant; Fe was mainly removed in the secondary sedimentation tank at a rate of 98.53%. The removal effects of different heavy metal nanoparticles varied in different treatment unit processes, with the effects of Ni, Pd, and Fe being the most significant. Heavy metal nanoparticles removal varied by treatment unit processes (aeration grit tank, secondary sedimentation tank, and high-efficiency sedimentation tank). The particle size distribution of heavy metal nanoparticles in different treatment unit processes was 23.28-147.83 nm, and different treatment unit processes did not have a significant impact on the particle size of each heavy metal nanoparticle. In addition, pH exhibited a significant negative correlation with Fe and Fe nanoparticles. Excluding Fe and Fe nanoparticles, other heavy metals and their nanoparticles were not significantly related; thus, different processing unit processes exhibited different removal mechanisms for heavy metals and their corresponding nanoparticles.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Metal nanoparticles Controlled terms:Heavy metals - Inductively coupled plasma - Inductively coupled plasma mass spectrometry - Mass spectrometers - Particle size - Particle size analysis - Sedimentation - Settling tanks - Sewage treatment plants - Wastewater treatment Uncontrolled terms:Continuous wastewater treatment - Different treatments - Heavy metal concentration - Inductively coupled plasma mass spectrometries (ICPMS) - International airport - Nanoparticle concentrations - Negative correlation - Secondary sedimentation tanks Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 531 Metallurgy and Metallography - 761 Nanotechnology - 801 Chemistry - 802.3 Chemical Operations - 932.3 Plasma Physics - 951 Materials Science Numerical data indexing:Percentage 9.85e+01%, Size 2.33e-08m to 1.48e-07m DOI:10.13227/j.hjkx.202012013 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582403 Title:Construction of Continuous Dynamic Model for River Networks and Its Application in Simulation of Spatiotemporal Migration of Typical Biocides Title of translation:河网连续动态模型构建及其在典型杀生剂时空迁移模拟中的应用 Authors:Xing, Cheng (1, 2); Zhang, Qian-Qian (1, 2); Cai, Ya-Ya (1, 2); Yan, Xiao-Ting (1, 2); Ying, Guang-Guo (1, 2) Author affiliation:(1) School of Environment, South China Normal University, Guangzhou; 510006, China; (2) Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Environmental Research Institute, South China Normal University, Guangzhou; 510006, China Corresponding author:Zhang, Qian-Qian(qianqian.zhang@m.scnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3147-3155 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Biocides are widely added to personal care products and enter the environment through sewage treatment plant (STP) discharge, which affects ecological health. This paper evaluated the pollution characteristics of triclosan and triclocarban in a river network during the COVID-19 epidemic. Moreover, a continuous dynamic river network model coupling a one-dimensional hydrodynamic model and four-level fugacity model was established to address the temporal and spatial heterogeneity of pollutants in the river network migration process; then, this model was applied to evaluate two biocides in the Shima River Basin. The model passed calibration and in-field concentration verification tests and yielded satisfactory simulation results. The results of the study showed that the concentration of biocides in the river network during the new crown epidemic was twice that of the non-epidemic period. The concentration of triclosan and triclocarban in the river channel first increased and then decreased with the increase of the river migration distance after STP discharge. The time variation characteristics of the concentrations were affected by the river flow. The biocide concentration in the river network of the low flow upstream area first increased and then decreased, gradually stabilizing in about 20 h. The pollution concentration in the high flow downstream area was increased, and the concentration did not stabilize at 24 h. These results indicate the necessity of evaluating the temporal and spatial characteristics of migration of typical biocides in the river network by stages and time on the premise of distinguishing the flow.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:River pollution Controlled terms:Biocides - Epidemiology - Rivers - Sewage treatment plants Uncontrolled terms:Continuous dynamics - Ecological health - Migration process - One-dimensional hydrodynamic model - Personal care products - Pollution concentration - Temporal and spatial - Verification tests Classification code:452.2 Sewage Treatment - 453 Water Pollution - 461.7 Health Care Numerical data indexing:Time 7.20e+04s, Time 8.64e+04s DOI:10.13227/j.hjkx.202011202 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404380 Title:Consecutive 4-year Elevated Atmospheric CO2 on Shaped Microbial Communities in the Rhizosphere Soil of Robinia pseudoacacia L. Seedlings Grown in Pb-contaminated Soils Title of translation:连续4个生长季大气CO2升高与土壤铅(Pb)污染耦合下刺槐幼苗根际土壤微生物特征 Authors:Jia, Xia (1, 2); Khadkhurel, Lkhagvajargal (1); Zhao, Yong-Hua (2); Zhang, Chun-Yan (1); Zhang, Ning-Jing (1); Gao, Yun-Feng (2); Wang, Zi-Wei (2) Author affiliation:(1) Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an; 710054, China; (2) Shaanxi Key Laboratory of Land Consolidation, School of Land Engineering, Chang'an University, Xi'an; 710054, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3046-3055 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Elevated atmospheric CO2 could affect the speciation of heavy metals in rhizosphere soils by changing root exudates, thereby influencing soil microecosystem in the rhizosphere. Therefore, understanding the function of heavy metals in soils on rhizospheric ecology under elevated atmospheric CO2 scenarios is highly important. Here, we investigated the combined effects of a four-year period of elevated air CO2 concentrations [(700±27) μmol•L-1] and Pb-contamination (15.6 mg•kg-1 and 515.6 mg•kg-1) on the soil rhizopheric microbial community of Robinia pseudoacacia L. seedlings. Significant (P<0.05) effects of CO2, Pb, and their interaction on bacterial richness and fungal diversity were observed. Relative to Pb exposure alone, elevated CO2 significantly increased pH, total C, total N, and water-soluble organic carbon, and the C/N ratio under Pb exposure (P<0.05) and significantly decreased total and soluble Pb content (P<0.05). The richness and diversity of bacteria increased (P<0.05), fungal richness decreased (P<0.05), and microbial diversity increased (P<0.05) under the combined treatments relative to Pb contamination alone. The changes in the relative abundance of the top two dominant bacterial and fungal genera were not significant; however, differences in the relative abundances of other groups, such as Anaerolineaceae, Solirubrobacterales, Eurotiomycetes, Aspergillus, and Trichocomaceae, were significant between the different treatments. According to a redundancy analysis, total C and soluble Pb had a significant influence (P<0.05) on the dominant bacterial genera, and total C affected (P<0.05) the dominant genera in the fungal community. These results suggest that the responses of soil environmental factors to the combination of elevated atmospheric CO2 and Pb could shape soil microbial community structure in the rhizosphere of R. pseudoacacia seedlings.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Soil pollution Controlled terms:Atmospheric structure - Carbon dioxide - Fungi - Lead - Microorganisms - Organic carbon - Soils Uncontrolled terms:Different treatments - Environmental factors - Heavy metals in soil - Microbial communities - Pb-contaminated soil - Robinia pseudo-acacia - Soil microbial community structure - Water-soluble organic carbon Classification code:443.1 Atmospheric Properties - 461.9 Biology - 483.1 Soils and Soil Mechanics - 546.1 Lead and Alloys - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Age 4.00e+00yr DOI:10.13227/j.hjkx.202009023 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404457 Title:Spatial Patterns of Nitrogen and Phosphorus in Soil and Their Influencing Factors in a Typical Agro-pastoral Ecotone Title of translation:农牧交错带典型区土壤氮磷空间分布特征及其影响因素 Authors:Zhang, Yan-Jiang (1, 2); Wang, Jun-Peng (1); Wang, Yu (1); Zhang, Xing-Chang (1, 2); Zhen, Qing (1, 2); Li, Peng-Fei (3) Author affiliation:(1) College of Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling; 712100, China; (3) Upper and Middle Yellow River Bureau, Yellow River Conservancy Commission of the Ministry of Water Resources, Xi'an; 710021, China Corresponding author:Zhang, Xing-Chang(zhangxc@ms.iswc.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3010-3017 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Soil nitrogen and phosphorus influence physical, chemical, and biological processes in soil, therefore, clarifying their contents and spatial patterns is of great significance for soil resource management and utilization. The spatial patterns of soil total nitrogen (TN) and phosphorus (TP) and the influencing factors in Jungar Banner were studied using classical statistical and geostatistical methods. The results showed that soil TN and TP contents decreased with soil depth, and the weighted mean values of TN and TP were 0.29 g•kg-1 and 0.26 g•kg-1, respectively. The nugget effect values of soil TN and TP were concentrated in the ranges 0.15-0.43 and 0.34-0.53, respectively, indicating that soil TN (except in the 0-10 cm and 80-100 cm zones) and TP were moderately spatially dependent, dominated by structural and random factors. The spatial distributions of soil nutrients were related to soil layers and elements, even in same layer, while the distributions of TN and TP were not consistent. Soil total nitrogen was mainly affected by soil organic carbon, while TP was mainly affected by latitude, altitude, vegetation, and soil texture.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Soil surveys Controlled terms:Nitrogen - Organic carbon - Phosphorus - Soils - Textures Uncontrolled terms:Agro-pastoral ecotones - Biological process - Geostatistical method - Nitrogen and phosphorus - Soil organic carbon - Soil total nitrogen - Spatial patterns - Weighted mean values Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Size 0.00e+00m to 1.00e-01m, Size 8.00e-01m to 1.00e+00m DOI:10.13227/j.hjkx.202008312 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247651 Title:Spatiotemporal Variations in Fine Particulate Matter and the Impact of Air Quality Control in Zhengzhou Title of translation:郑州市细颗粒物时空差异及管控措施影响 Authors:Dong, Zhe (1); Yuan, Ming-Hao (2); Su, Fang-Cheng (1); Zhang, Jian-Fei (1); Sun, Jia-Bin (1); Zhang, Rui-Qin (3) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Zhengzhou Environmental Protection Monitoring Center Station, Zhengzhou; 450007, China; (3) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2179-2189 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To study the spatiotemporal variations in fine particulate matter (PM2.5) and the impact of air quality management in autumn and winter in Zhengzhou, five sites were selected to collect PM2.5 samples from the autumn of 2017 to the winter of 2018, and the characteristics of the chemical components were analyzed. The positive matrix factorization (PMF) model was also applied to identify the sources of PM2.5, and the effect of air quality control was evaluated to provide support for air quality control in autumn and winter in the next stage. The PM2.5 concentrations in the four seasons in Zhengzhou were ranked as winter>autumn>spring>summer. The PM2.5 concentration at Zhengzhou University (ZZU) was the highest (8.7% higher than the average concentration), and the PM2.5 concentrations at the other sites were slightly lower than the average concentration. The concentration of water-soluble ions (WSIs) was low in spring and summer and high in autumn and winter. The average proportions of SO42-, NO3-, and NH4+ in the nine WSIs were as high as 22.5%, 43.6%, and 23.4%, respectively. The proportion of Cl- in winter was higher than that in the other seasons owing to coal combustion (6.7% and 6.6% in 2017 and 2018, respectively). Owing to wind and sand, the proportions of Ca2+ and Mg2+ in spring were the highest (4.4% and 0.4%, respectively), and those at the Jiancezhan (JCZ) and ZZU sites were higher than those at the other sites. K+, as a marker of biomass burning, had a higher proportion in spring, autumn, and winter. The proportion of K+ in the spring of 2018 was 1.9%, those in the autumn and winter of 2017 were 1.6% and 2.1%, respectively, and those in the autumn and winter of 2018 were 1.3% and 1.8%, respectively. JCZ, Hangkonggang (HKG), and Xinmi (XM) had higher proportions of NO3-, and the proportions of SO42- were lower. Secondary organic carbon (SOC) pollution was serious in autumn and winter, and the concentration accounted for more than half of the organic carbon (OC). In 2018, the SOC/OC at the JCZ and ZZU sites decreased compared with that in 2017, but that at the other three sites increased significantly, thereby indicating that different air pollutant emissions in these regions had different performances in response to control policies. The chemical composition reconstruction results showed that the proportion of sulfate was highest in summer (25.0%), the contribution of nitrate was higher in autumn (23.1% and 25.1% for 2017 and 2018, respectively) and winter (20.6% and 23.0% for 2017 and 2018, respectively), the proportion of crustal material was higher in spring (18.2%), and the contribution of secondary organic aerosol (SOA) was the highest in winter (14.1% and 20.5% for 2017 and 2018, respectively). SOA had higher contributions at the JCZ and HKG sites (16.9% and 16.4%, respectively), and ZZU was affected more by primary organic aerosol (14.3%) and crustal materials (12.1%). The PMF results showed that secondary inorganic salts (37.5%), SOA (15.4%), traffic (14.9%), industry (4.8%), coal combustion (16.0%), fugitive dust (6.5%), and biomass burning (2.8%) were the main pollution sources of PM2.5 in Zhengzhou. SOA and coal combustion contributed more in winter and fugitive dust contributed more in spring, followed by autumn. Biomass burning contributed more in spring and autumn. The urban sites JCZ and ZZU and the characteristic site HKG near the airport were more affected by traffic sources (16.9%, 16.2%, and 16.0%, respectively) than the other sites. The impact of biomass burning on the non-urban sites XM and HKG was slightly larger (both 2.7%), and the contribution of coal combustion to the suburban site XM was higher (16.8%). Owing to the construction around ZZU, the loading of fugitive dust at ZZU was higher than that at other sites. Comparing the results of the two-year autumn and winter, the contribution of SOA, traffic, and industry increased in the autumn and winter of 2018, whereas the contribution of secondary inorganic salts, coal combustion, and biomass burning decreased and the contribution of fugitive dust in winter also decreased. The results showed that the control strategies in autumn and winter had significant effects on the primary sources, including fugitive dust, coal combustion, and industry, and SOA precursor volatile organic compounds should be targeted for further pollution control.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Coal combustion Controlled terms:Aerosols - Air pollution control - Air quality - Biomass - Chemical analysis - Coal - Coal dust - Coal industry - Factorization - Organic carbon - Particles (particulate matter) - Quality assurance - Quality control - Salts - Springs (components) - Sulfur compounds - Urban growth - Volatile organic compounds Uncontrolled terms:Air pollutant emission - Chemical compositions - Fine particulate matter - Fine particulate matter (PM2.5) - Positive matrix factorization models - Secondary organic aerosols - Secondary organic carbons (SOC) - Spatio-temporal variation Classification code:403.1 Urban Planning and Development - 451.2 Air Pollution Control - 524 Solid Fuels - 601.2 Machine Components - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 921 Mathematics - 951 Materials Science Numerical data indexing:Percentage 1.21e+01%, Percentage 1.30e+00%, Percentage 1.41e+01%, Percentage 1.43e+01%, Percentage 1.49e+01%, Percentage 1.54e+01%, Percentage 1.60e+00%, Percentage 2.31e+01%, Percentage 1.60e+01%, Percentage 1.62e+01%, Percentage 1.64e+01%, Percentage 1.68e+01%, Percentage 1.69e+01%, Percentage 1.80e+00%, Percentage 1.82e+01%, Percentage 1.90e+00%, Percentage 2.05e+01%, Percentage 2.06e+01%, Percentage 2.10e+00%, Percentage 2.25e+01%, Percentage 2.30e+01%, Percentage 6.70e+00%, Percentage 8.70e+00%, Percentage 2.34e+01%, Percentage 2.50e+01%, Percentage 2.51e+01%, Percentage 2.70e+00%, Percentage 2.80e+00%, Percentage 3.75e+01%, Percentage 4.00e-01%, Percentage 4.36e+01%, Percentage 4.40e+00%, Percentage 4.80e+00%, Percentage 6.50e+00%, Percentage 6.60e+00% DOI:10.13227/j.hjkx.202009208 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126231 Title:Source Profiles and Impact of VOCs Based on Production Processes in Foundry Industries Title of translation:铸造行业挥发性有机物排放成分谱及影响 Authors:Gao, Shuang (1, 2); Li, Shi-Bei (1, 2); Bo, Xin (1, 2); Li, Hou-Yu (3); Shu, Mu-Shui (4); Dan, Mo (4); Qu, Jia-Bao (1, 2); Lei, Tuan-Tuan (1, 2) Author affiliation:(1) Appraisal Center for Environment and Engineering, Ministry of Ecology and Environment, Beijing; 100012, China; (2) State Environmental Protection Key Laboratory of Numerical Modeling for Environment Impact Assessment, Ministry of Ecology and Environment, Beijing; 100012, China; (3) Shandong Academy for Environmental Planning, Ji'nan; 250101, China; (4) Beijing Municipal Institute of Labour Protection, Beijing; 100054, China Corresponding author:Li, Shi-Bei(lisb@acee.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1649-1659 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The characteristics of the VOCs species in foundry industries based on the production processes were analyzed through gas chromatography-mass spectrometry (GC-MS) after sampling the emissions of VOCs in 9 typical foundry enterprises using air packages and absorption tubes. The source profiles of the VOCs species in foundry industries based on production processes were established for the first time in China. In addition, the emission characteristics of VOCs and the contribution of VOCs emitted by various production processes to ozone generation were also studied. The results showed that the characteristic components of the VOCs in foundry industries were predominantly aromatic hydrocarbons, halogenated hydrocarbons, and oxygenated hydrocarbons. The average concentrations were 50.9%, 20.8%, and 12.6%, respectively. In general, aromatic hydrocarbons, such as toluene, benzene, and m/p-xylene; halogenated hydrocarbons, such as trichloroethylene and dichloromethane; oxygenated hydrocarbons, such as acetone, ethyl acetate, cyclopentanone, and some alkanes, were the primary VOCs species of the foundry industries. The emission characteristics of different production processes were related to the solvents and surface treating agents used by each process. The results also demonstrated that painting was the largest contributor of VOCs concentrations among all the production processes, followed by the modeling procedure and the silica sol and pouring processes. The OFP values for the different production processes ranged from 0.29-96.09 mg•m-3. Painting was the largest contributor to OFP, followed by the modeling procedure and the melting and pouring processes. Aromatic hydrocarbons and oxygenated hydrocarbons were the dominant contributors to OFP, and 1, 3, 5-trimethylbenzene, 1, 2, 4-trimethylbenzene, toluene, and m/p-xylene were the main active components in the foundry industry, with a total contribution to the ozone generation potential of nearly 60%. It is suggested that the painting process should be prioritized regarding control measures to reduce its emissions and impact, while the waste gas from the modeling procedure and the melting and pouring processes should be collected efficiently and treated properly before being discharged to the environment.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Foundries Controlled terms:Absorption spectroscopy - Acetone - Aromatization - Dichloromethane - Gas chromatography - Gas emissions - Halogenation - Mass spectrometry - Melting - Mineral oils - Ozone - Silica - Sols - Toluene Uncontrolled terms:1 , 2 , 4-trimethylbenzene - 1 ,3 ,5-Trimethylbenzene - Average concentration - Emission characteristics - Gas chromatography-mass spectrometries (GC-MS) - Halogenated hydrocarbons - Oxygenated hydrocarbon - Production process Classification code:513.3 Petroleum Products - 534.1 Foundries - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.26e+01%, Percentage 2.08e+01%, Percentage 5.09e+01%, Percentage 6.00e+01% DOI:10.13227/j.hjkx.202008145 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688843 Title:Estimation of the Urban Heat Island Intensity Change and Its Relationships with Driving Factors Across China Based on the Human Settlement Scale Title of translation:基于人居尺度的中国城市热岛强度时空变化及其驱动因子解析 Authors:Sun, Yan-Wei (1, 2, 3); Wang, Run (4); Guo, Qing-Hai (5); Gao, Chao (1) Author affiliation:(1) Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo; 315211, China; (2) Center for Land and Marine Spatial Utilization and Governance Research, Ningbo University, Ningbo; 315211, China; (3) Institute of East China Sea, Ningbo University, Ningbo; 315211, China; (4) School of Resources and Environmental Science, Hubei University, Wuhan; 430062, China; (5) School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou; 310018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:501-512 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Considering a background of global warming, the effect of urban heat island (UHI) has become a serious ecological and environmental problem that is commonly faced by modern cities worldwide, posing challenges to the physical and mental health of residents in urban areas, air quality, and the healthy growth of surface vegetation. Using time series MODIS land surface temperature data products from 2001 to 2018, we evaluated the urban heat island intensity (UHII) and its spatiotemporal patterns in 1 232 major urban human settlement patches (area>10 km2) across China based on the consistency method. A random forest regression model (RF) was also used to reveal the driving mechanism of urban heat island intensity in China due to human activities, urban morphology, vegetation, topography, and meteorological factors. The results show that more than 90% of cities and towns in China have exhibited significant diurnal heat island phenomena on the scale of human settlements. The diurnal UHII reaches up to (0.75±0.6)℃ and (0.81±0.53)℃, respectively. The daytime UHII in summer was significantly higher than that in winter, while there was little difference in nighttime UHII between summer and winter. During the past 18 years, the daytime UHII in China has shown a slight downward trend, while the nighttime UHII has increased significantly, with no significant change in summer and on mean annual scales. In terms of spatial distribution, the eastern coastal provinces have higher daytime UHII than those of the western or plateau provinces, while the nighttime UHII shows the opposite pattern. The RF regression results show that the average annual rainfall and latitudinal position of cities and towns are the two most important factors controlling the daytime and nighttime UHII in China. Narrowing the differences in vegetation growth between urban and rural environments will have a mitigating effect on the daytime UHII, and controlling the expansion of small and medium-sized towns will also play a positive role in the continuously rising nighttime UHII.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Urban growth Controlled terms:Air quality - Atmospheric temperature - Decision trees - Global warming - Land surface temperature - Landforms - Regression analysis - Thermal pollution - Topography - Vegetation Uncontrolled terms:Driving mechanism - Environmental problems - Heat island phenomena - Meteorological factors - Mitigating effects - Spatiotemporal patterns - Surface vegetation - Urban heat island intensities Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 451.2 Air Pollution Control - 481.1 Geology - 922.2 Mathematical Statistics - 951 Materials Science - 961 Systems Science Numerical data indexing:Age 1.80e+01yr, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202006009 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779764 Title:Release Risk of Phosphorus by Sediments and Its Influencing Factors in Ponds and Ditches of a New Urban District Park Title of translation:城市新城区公园沟塘沉积物磷释放风险及影响因素分析 Authors:Li, Ru-Zhong (1); Song, Min (1); Yang, Ji-Wei (2) Author affiliation:(1) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei; 230009, China; (2) Water Resources Research Institute of Anhui Province and Huaihe River Commission, Ministry of Water Resources, Bengbu; 233000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4287-4295 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study examined five ponds and three ditches in the Shufengwan Sports Park in a new urban district of Hefei City, from which surface-layer sediments and overlying water samples were collected during autumn, winter, and summer. The equilibrium phosphate concentrations (EPC0) of the sediments and its response to exogenous carbon or nitrogen were then measured. The resulting EPC0values were used to assess the risk of phosphorus release by the sediments. Finally, major factors influencing phosphorous release were identified using the Partial Least Squares Regression (PLSR) method. The sediments in the urban park exhibited a light-to-moderate level of phosphorous pollution, with the total phosphorus content (TP) ranging from 209.28 to 713.51 mg•kg-1 and biologically available phosphorus accounting for 18.51%-36.21% of the total phosphorus content. Under ambient background, the EPC0 values in pond sediments were 0.012-0.142 mg•L-1, with a mean value of 0.057 mg•L-1, while in ditches the values ranged from 0.036 to 0.156 mg•L-1 with an average value of 0.078 mg•L-1. The addition of exogenous carbon increased the EPC0 values (by approximately 47.5% in pond 3), and thus increased the risk of phosphorus release from sediments, in pond 1, 3, and ditch 1. However, EPC0 values of the other ponds and ditches decreased (in particular, by approximately 58.6% in pond 5), indicating that the risk of phosphorus release decreased. After the addition of exogenous nitrogen, the EPC0 values of almost all ponds and ditches declined to varying degrees (except in ditches 1 and 2 during the summer). In particular, in the EPC0 value of pond 2 declined by approximately 51.6%. The declining values imply that nitrogen was a limiting factor in phosphorus uptake by sediments in ponds and ditches. According to the results of PLSR, nitrogen and phosphorus had different effects on the EPC0 values of sediments in ponds and ditches.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Phosphorus Controlled terms:Carbon - Lakes - Least squares approximations - Nitrogen - Ponds - Risk assessment - Sediments Uncontrolled terms:Available phosphorus - Different effects - Nitrogen and phosphorus - Partial least squares regressions (PLSR) - Phosphate concentration - Phosphorus release - Phosphorus uptake - Total phosphorus Classification code:454.3 Ecology and Ecosystems - 483 Soil Mechanics and Foundations - 804 Chemical Products Generally - 914.1 Accidents and Accident Prevention - 921.6 Numerical Methods Numerical data indexing:Mass_Density 1.20e-05kg/m3 to 1.42e-04kg/m3, Mass_Density 3.60e-05kg/m3 to 1.56e-04kg/m3, Mass_Density 5.70e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 7.80e-05kg/m3 to 2.20e-02kg/m3, Percentage 1.85e+01% to 3.62e+01%, Percentage 4.75e+01%, Percentage 5.16e+01%, Percentage 5.86e+01% DOI:10.13227/j.hjkx.202101015 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688838 Title:Mechanism of Algal Community Dynamics Driven by the Seasonal Water Bacterial Community in a Stratified Drinking Water Reservoir Title of translation:分层型水库藻类季相演替的细菌种群驱动机制 Authors:Yan, Miao-Miao (1); Zhang, Hai-Han (1); Huang, Ting-Lin (1); Zong, Rong-Rong (1); Liu, Kai-Wen (1); Miao, Yu-Tian (1); Yang, Shang-Ye (1); Huang, Xin (1); Wang, Na (1) Author affiliation:(1) Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding authors:Zhang, Hai-Han(zhanghaihan@xauat.edu.cn); Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:221-233 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Phytoplankton and bacteria are crucial components of aquatic food webs, playing critical roles in the structure and function of freshwater ecosystems. However, there are few studies on how the algal and bacterial communities interact and respond to changing environmental conditions in the water reservoirs. Thus, the ecological interaction relationship between the temporal succession of the phytoplankton community and the bacterial community was investigated using 16S rDNA high-throughput sequencing and a co-occurrence network in the Lijiahe Reservoir. The results showed that Bacillariophyta and Chlorophyta were also dominant taxa in the phytoplankton community. In August, Cyanobacteria replaced Bacillariophyta as the second-most dominant taxa, with an average relative abundance of 30.13%. DNA sequencing showed that Proteobacteria, Actinobacteria, and Bacteroidetes dominated throughout the year. Proteobacteria reached a maximum relative abundance of 71.68% in July. Acidobacteria and Deinococcus-Thermus, which were rare taxa, reached maximum relative abundances of 10.20% and 5.56%, respectively. The co-occurrence network showed that the association between algae and bacteria was mainly positive, indicating that the interaction between them may be dominated by mutualism. As a keystone taxa, Methylotenera was significantly and positively related to Chlorella. Scenedesmus was also a keystone taxa and was significantly and negatively correlated with various bacteria, such as Methylobacter, Solitalea, and Rhodoferax. An RDA analysis showed that the succession of algal and bacterial communities was significantly regulated by water temperature, pH, and conductivity, and the environmental factors explained 93.1% and 90% of the variation in the algal community and bacterial community, respectively. The results will provide a scientific basis for exploring the micro-ecological driving mechanism of the interaction between algae and bacteria in deep drinking water reservoir ecosystems.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Reservoirs (water) Controlled terms:Aquatic ecosystems - Arches - Association reactions - Bacteria - DNA sequences - Gene encoding - Phytoplankton - Potable water Uncontrolled terms:Bacterial community - Co-occurrence networks - Ecological interactions - Environmental conditions - Environmental factors - Freshwater ecosystem - High-throughput sequencing - Phytoplankton community Classification code:408.2 Structural Members and Shapes - 441.2 Reservoirs - 444 Water Resources - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 802.2 Chemical Reactions Numerical data indexing:Percentage 1.02e+01%, Percentage 3.01e+01%, Percentage 5.56e+00%, Percentage 7.17e+01%, Percentage 9.00e+01%, Percentage 9.31e+01% DOI:10.13227/j.hjkx.202006234 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804530 Title:Bioavailability and Ecological Risk Assessment of Cadmium in the Sea-Land Interaction Sediments of the Pearl River Delta Title of translation:珠江三角洲海陆交互相沉积物中镉生物有效性与生态风险评价 Authors:Wang, Fang-Ting (1); Bao, Ke (2); Chen, Zhi-Hua (1); Huang, Chang-Sheng (3); Zhang, Cai-Xiang (1); Zhao, Xin-Wen (3); Liu, Xue-Hao (3) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) Safety Center for River and Lake Protection, Construction and Operation, Changjiang Water Resources Commission of the Ministry of Water Resources, Wuhan; 430015, China; (3) Wuhan Geological Survey Center, China Geological Survey, Wuhan; 430205, China Corresponding author:Huang, Chang-Sheng(cshuang@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:653-662 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cadmium (Cd) pollution poses a threat to human health, and research on Cd bioavailability as well as its ecological risk assessment can help prevent and mitigate Cd hazards. The enrichment characteristics and variability of Cd were investigated in sea-land interaction soil fractions and the associated environmental and ecological risks were evaluated using the accumulation index (Igeo), potential ecological hazard index (Er), and risk assessment coding (RAC). The results showed that: ① The Cd content of miscellaneous fill material was typically lower than 0.3 mg•kg-1 and that of plain full was higher than 0.3 mg•kg-1. The Cd content of marine sediment was significantly higher than that of continental sediments, averaging 0.36 and 0.10 mg•kg-1, respectively. The concentration of Cd in marine sediments buried at shallow depths (<5 m) was generally higher than at greater depths (>5 m). ② There was a moderate correlation between Cd and CEC in artificial fill (Q4ml; correlation coefficient=0.52, P<0.05). There was a weak correlation between Cd and organic matter in the marine sediments (correlation coefficient=0.49, P<0.05). Total cadmium and the physical and chemical properties of soil had a significant influence on the fraction of soil cadmium. ③ The Igeo of artificially fill and marine sediment was dominated by the relationship 1geo<2, which indicated a moderate level of pollution. The Er of artificial fill and marine sediment was mainly 80r<160, indicating a high potential ecological hazard. Soil acid-extractable Cd accounted for more than 50% of the total Cd in each drill hole, which generally indicated a very high potential ecological risk. These results provide a basis for environmental and agricultural decision-making and provide theoretical guidance for soil pollution investigations and remediation.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Sediments Controlled terms:Agricultural robots - Biochemistry - Biohazards - Cadmium - Decision making - Health hazards - Health risks - Marine pollution - Risk assessment - River pollution - Soil pollution - Soils - Submarine geology Uncontrolled terms:Correlation coefficient - Ecological risk assessment - Enrichment characteristics - Miscellaneous fill - Pearl River delta - Physical and chemical properties - Potential ecological hazards - Sea-land interactions Classification code:453 Water Pollution - 461.7 Health Care - 471.1 Oceanography, General - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 912.2 Management - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 5.00e+01% DOI:10.13227/j.hjkx.202007140 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651099 Title:Diversity and PICRUSt2-based Predicted Functional Analysis of Bacterial Communities During the Start-up of ANAMMOX Title of translation:厌氧氨氧化启动过程细菌群落多样性及 PICRUSt2功能预测分析 Authors:Yan, Bing (1, 2); Fu, Jia-Qi (1); Xia, Song (1); Yi, Qi-Zhen (1); Gui, Shuang-Lin (1); Wu, Jiu-Jiu (1); Xiong, Ji-Hai (1); Wei, Yuan-Song (1, 2) Author affiliation:(1) Institute of Energy, Jiangxi Academy of Sciences, Nanchang; 330096, China; (2) Laboratory of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Wei, Yuan-Song(yswei@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3875-3885 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Bacterial communities are vital for efficient nitrogen removal in an anaerobic ammonium oxidation (ANAMMOX) system. However, the diversity and functional characteristics of a bacterial community during the start-up of ANAMMOX has not been reported. In this study, an up-flow anaerobic sludge bed reactor was used to start-up the ANAMMOX system, and 16S rRNA high-throughput gene sequencing, combined with PICRUSt2-based functional prediction analysis, was used to investigate the dynamic changes in diversity and function of the bacterial community at different times (d0, d30, d60, and d90) during the start-up. The results showed that 48 phyla, 111 classes, 269 orders, 457 families, 840 genera, and 1497 species were present during the start-up of ANAMMOX. Candidatus Brocadia and Candidatus_Kuenenia were the main detected ANAMMOX bacteria, and their relative abundance was significantly different at different times during the start-up of ANAMMOX (P<0.05). During the start-up, the alpha diversity indices of the bacterial community were significantly decreased (P<0.05), and the structure of the bacterial community exhibited significant spatial differentiation (R=0.846, P<0.01). Functional prediction analysis with PICRUSt2 revealed that the bacterial community was active in organic systems and metabolism at hierarchy level 1, implying abundant functional diversity. Further, the abundance of functional genes was significantly different at hierarchy level 2, during the start-up of ANAMMOX. Forty-nine functional genes involving metabolic nitrogen were detected. The abundance of functional genes, involved in nitrification, denitrification, ANAMMOX, and nitrate and nitrite assimilatory/dissimilatory reduction, changed significantly during the start-up of ANAMMOX.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Nitrogen removal Controlled terms:Bacteria - Genes - Metabolism - RNA - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Bacterial community - Functional characteristics - Functional diversity - Functional predictions - Relative abundance - Spatial differentiation - Up-flow anaerobic sludge bed reactors Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering DOI:10.13227/j.hjkx.202010232 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779710 Title:Effect of Chelated Iron on Nitrogen Removal Efficiency and Microbial Community Structure in the Anaerobic Ferric Ammonium Oxidation Title of translation:螯合铁对厌氧铁氨氧化脱氮效能及微生物群落的影响 Authors:Liao, Hong-Yan (1, 2); Song, Cheng (1); Wan, Liu-Yang (1, 2); Shi, Shao-Peng (1, 2); Wang, Xing-Zu (1) Author affiliation:(1) Research Center for Process and Prevention of Water Pollution, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Wang, Xing-Zu(wangxingzu@cigit.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4366-4373 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to understand the characteristics and interactions of the microbial community during the anaerobic ferric ammonium oxidation (FEAMMOX) process, this study investigated the effects of various forms of chelated iron on nitrogen removal efficiency and microbial community structure. After 77 days of reactor operation, the removal efficiency of total nitrogen was 83.32% for the ferric humate group, 43.67% for the ferric citrate group, 55.07% for the ferric sodium ethylene diamine tetraacetate group, and 12.65% for the ferric ammonium triacetate group. After the experiment, the abundance of denitrifying bacteria Comamonadaceae in ferric humate group was 17.57%, the abundance of Clostridium in ferric citrate group was 47.70%; and the abundance of denitrifying bacteria Thermomonas in the ferric sodium ethylene diamine tetraacetate group was 20.11%. This indicates that ferric humate is a more effective electron acceptor for the FEAMMOX process. The result of function prediction shows that the iron, sulfur, and nitrogen cycles are all closely related, with iron and sulfur metabolism playing an important role in nitrogen removal. In the humate group, iron respiration and the nitrogen cycle are more strongly correlated than other groups. Co-occurrence network analysis showed that the keystone species in the FEAMMOX process is Tessaracoccus.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Nitrogen removal Controlled terms:Aliphatic compounds - Amines - Bacteria - Chelation - Denitrification - Efficiency - Ethylene - Iron - Sodium compounds - Sulfur Uncontrolled terms:Co-occurrence networks - Denitrifying bacteria - Effective electrons - Ethylene diamine tetraacetate - Microbial communities - Microbial community structures - Nitrogen removal efficiency - Removal efficiencies Classification code:545.1 Iron - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 913.1 Production Engineering Numerical data indexing:Age 2.11e-01yr, Percentage 1.27e+01%, Percentage 1.76e+01%, Percentage 2.01e+01%, Percentage 4.37e+01%, Percentage 5.51e+01%, Percentage 8.33e+01% DOI:10.13227/j.hjkx.202012216 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003262 Title:Adsorption Behavior of Phosphate by CaO2 Remolded Sediment Title of translation:过氧化钙重塑底泥对水中磷酸盐的吸附作用 Authors:Xu, Chu-Tian (1, 2); Li, Da-Peng (1, 2); Wang, Zi-Liang (1); Wu, Yu-Han (1); Xu, Xin-Peng (1); Huang, Yong (1, 2) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Environment Biotechnology Research Institute, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Li, Da-Peng(ustsldp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1424-1432 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study simulated the state of CaO2 loss after in situ coverage and examined the bottom 2 cm of sediment after restoration. Observations and elemental analysis of the sediment using scanning electron microscopy (SEM) and X-ray energy spectrometry (EDX) were also performed. The CaO2 remodeling notably changed the structure of the sediment; most of the organic matter and iron-manganese oxide attached to the sediment surface was removed, the porosity of the sediment particles increased, and the Ca2+ content was also increased. CaO2 remodeling stabilized the endogenous phosphorus in the sediment; total phosphorous (TP) was reduced by approximately 20% and potential active phosphorus content was reduced by approximately 30%. Furthermore, the contents of Ca-P and Res-P were significantly increased. The amount of phosphorus released from the remodeled sediment under anaerobic conditions was significantly lower than the original sediment, indicating that the CaO2 remodeling greatly reduced the risk of endogenous phosphorus release. The Langmuir model was more suitable than the Freundlich and Dubinin-Radushkevich models for describing the isothermal adsorption behavior of the CaO2 remodeling, which significantly improved the adsorption capacity of the sediment with respect to phosphate from 1.44 mg•g-1 to 20.91 mg•g-1. The mechanism of adsorption was switched from chemical adsorption to physicochemical adsorption. In addition, the adsorption kinetics of the CaO2 remodeled sediment with respect to phosphate could be best described using the quasi-second-order kinetic model.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Calcium compounds Controlled terms:Adsorption - Iron oxides - Manganese oxide - Phosphorus - Scanning electron microscopy - Sediments Uncontrolled terms:Adsorption capacities - Anaerobic conditions - Dubinin-Radushkevich - Iron manganese oxide - Isothermal adsorption - Phosphorus contents - Physico-chemical adsorption - Second order kinetics Classification code:483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.00e+01%, Percentage 3.00e+01%, Size 2.00e-02m DOI:10.13227/j.hjkx.202007221 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126229 Title:Animal Manure Fertilization Promotes Antibiotic Resistance Gene Dissemination Among Manure, Soil, and Vegetables Title of translation:动物粪便施肥措施促进耐药基因在粪便-土壤-蔬菜之间的散播 Authors:Zhang, Hong-Na (1); Dong, Meng-Jie (1); Zhou, Yu-Fa (2); Sun, Jia-Xin (1); Chang, Mei-Jie (1); Zhai, Zhen-Zhen (3) Author affiliation:(1) College of Biological Science and Engineering, Hebei University of Economics and Business, Shijiazhuang; 050061, China; (2) Animal Husbandry Bureau of Daiyue Region, Tai'an; 271000, China; (3) Center Hospital of Tai'an City, Tai'an; 271000, China Corresponding author:Zhai, Zhen-Zhen(sdzzzhai@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2080-2088 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Increasing antibiotic resistant genes (ARG) are being detected in animal manure-amended soil, causing public concerns. However, the effects of animal manure fertilization on the ARG of vegetable endophytes remain unknown. In this study, high-throughput quantitative PCR (HT-qPCR) was used to explore the effects of poultry manure fertilization on the bacterial community and resistome in the soil, root endophytes, and leaf endophytes from Cichorium endivia L.. The results indicated that poultry manure fertilization not only enhanced the number of ARG in soil and root endophytes, but also increased the abundance of ARG in the soil, root endophytes, and leaf endophytes. The relationship analysis demonstrated that the ARG profile in the soil and vegetable endophytes was significantly correlated with the bacterial community, and the ARG abundance was highly correlated with Proteobacteria, Acidobacteria, Actinobacteria, and Cyanobacteria. In addition, the overlapping ARG between the Cichorium endivia L. endophyte and soil indicated the internal spread route of the ARG from the manure to Cichorium endivia L through the soil. In conclusion, poultry manure fertilization increased the diversity and abundance of the ARG in vegetables via the manure-soil-vegetable pathway.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Manures Controlled terms:Animals - Antibiotics - Bacteria - Fertilizers - Genes - Polymerase chain reaction - Soils - Vegetables Uncontrolled terms:Antibiotic resistance genes - Antibiotic-resistant genes - Bacterial community - High throughput - Highly-correlated - Proteobacteria - Quantitative PCR - Relationship analysis Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 804 Chemical Products Generally - 821.4 Agricultural Products - 821.5 Agricultural Wastes DOI:10.13227/j.hjkx.202009038 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247408 Title:Analysis of the Spatial Changes in Bacterial Communities in Urban Reclaimed Water Channel Sediments: A Case Study of the North Canal River Title of translation:城市再生水河道沉积物细菌群落空间变化分析:以京津冀北运河为例 Authors:Qiu, Ying (1); Jin, Yan (1); Su, Zhen-Hua (2); Di, Yan-Ming (3); Zhao, Dong-Liang (1); Guo, Xiao-Yu (1) Author affiliation:(1) College of Resources Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) China National Pulp and Paper Research Institute, Beijing; 100020, China; (3) Beijing North Canal Manage Office, Beijing; 101100, China Corresponding author:Guo, Xiao-Yu(xiaoyucnu@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2287-2295 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Sediment bacteria have attracted much attention because of their important roles in energy flow and pollutant cycle transformation. The changes in the spatial distribution pattern of bacteria are the basis for research on the biodiversity generation and maintenance mechanisms. However, there are few studies on the spatial variation in benthic microorganisms and its biogeographic models. The highly artificial North Canal River across the Beijing-Tianjin-Hebei area was chosen as the research area in this study. The spatial variation in the different classification levels of the Kingdom, Phylum, Class, Order, Family, Genus, Species, and operational taxonomic units and their diversity formation mechanisms were analyzed. The results showed that the samples at different classification levels had a more homogeneous distribution pattern. There were clearer distribution boundaries at the low classification levels than at the high classification levels. The significance of the bacterial community variation increased as the classification level of the bacterial community decreased. Furthermore, the difference between groups increased and the similarities within groups decreased as the classification level of the bacterial community decreased. The typical rhizosphere microorganisms represented by Frankiales and Rhodobacterales showed significant enrichment in the upstream samples, followed by the midstream samples and a significant decrease in the downstream samples. Microorganisms related to the carbon, nitrogen, and sulfur cycles represented by Anaerolineales and Desulfobacterales showed significant enrichment in the midstream, followed by the downstream and a significant reduction in the upstream. The genus Phenylobacterium was significantly enriched in the upstream followed by the midstream, and was significantly reduced in the downstream. The pathogenic bacteria represented by Clostridium_gasigenes and Moraxella_osloensis showed a significant enrichment pattern in the midstream. The contents of Ca2+, SO42-, and total organic carbon (TOC) in the downstream samples were significantly higher than those in the upstream and midstream samples. The discharge of untreated wastewater downstream increased the salt and TOC contents in the sediment. The ecological restoration project in the sediment of the riparian zone decreased the salt and TOC contents in the upstream and midstream samples. Environmental selection was the main driving factor of the pattern of spatial variation in the bacterial communities in the sediments of the North Canal River.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Bacteria Controlled terms:Biodiversity - Hydraulic structures - Organic carbon - Rivers - Sediments - Soils Uncontrolled terms:Distribution boundary - Ecological restoration - Homogeneous distribution - Operational taxonomic units - Rhizosphere microorganisms - Spatial distribution patterns - Total Organic Carbon - Untreated wastewater Classification code:454 Environmental Engineering - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202008246 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003415 Title:Nitrogen and Phosphorus Removal in Surface Flow Constructed Wetland Planted with Myriophyllum elatinoides Treating Swine Wastewater in Subtropical Central China Title of translation:亚热带丘陵区绿狐尾藻人工湿地处理养猪废水氮磷去向 Authors:Wang, Li-Sha (1, 2); Li, Xi (1); Li, Yu-Yuan (1); Zhang, Man-Yi (1); Wu, Jin-Shui (1) Author affiliation:(1) Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Li, Xi(lixi@isa.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1433-1442 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The loss of nitrogen (N) and phosphorus (P) from aquaculture has caused eutrophication of freshwater systems. Here, surface flow constructed wetland (SFCW) planted with Myriophyllum elatinoides were used to treat swine wastewater from a medium-sized hoggery in subtropical Central China. Inflow concentrations of NH4+-N, TN, TP, and COD ranged from 535.4 to 591.09, 682.09 to 766.96, 57.73 to 82.29, and 918.4 to 1 940.43 mg•L-1, respectively. The mean removal efficiencies of NH4+-N, TN, TP, and COD were 97.4%, 97.1%, 91.0%, and 90.2%, respectively, and CW1 had the largest contributions of 37.3%, 38.4%, 43.3%, and 27.4%, respectively. Plant N and P uptake ranged 23.87-79.96 g•m-2 and 5.34-18.98 g•m-2, accounting for 19.1% and 20.2% of removal, respectively. Sediment N and P accumulation ranged 19.17-56.62 g•m-2 and 10.59-26.62 g•m-2, accounting for 19.8% and 61.7% of removal, respectively. Multiple linear regression showed that environmental factors explained 79.9% of the N removal and 70.1% of the P removal; DO was the main factor affecting N removal, and sediment adsorption was the key process in P removal. These results show that M. elatinoides constructed wetland can efficiently treat swine wastewater, thereby reduce the discharge of pollutants downstream.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Nitrogen removal Controlled terms:Eutrophication - Linear regression - Nitrogen - Phosphorus - Tropics - Wastewater treatment - Wetlands Uncontrolled terms:Constructed wetlands - Environmental factors - Freshwater systems - Multiple linear regressions - Nitrogen and phosphorus removal - Removal efficiencies - Surface flow constructed wetlands - Swine wastewater Classification code:443 Meteorology - 452.4 Industrial Wastes Treatment and Disposal - 804 Chemical Products Generally - 922.2 Mathematical Statistics Numerical data indexing:Mass_Density 9.40e-01kg/m3 to 2.20e-02kg/m3, Percentage 1.91e+01%, Percentage 1.98e+01%, Percentage 2.02e+01%, Percentage 2.74e+01%, Percentage 3.73e+01%, Percentage 3.84e+01%, Percentage 4.33e+01%, Percentage 6.17e+01%, Percentage 7.01e+01%, Percentage 7.99e+01%, Percentage 9.02e+01%, Percentage 9.10e+01%, Percentage 9.71e+01%, Percentage 9.74e+01% DOI:10.13227/j.hjkx.202007073 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003298 Title:VOCs Emission Inventory and Variation Characteristics of Artificial Sources in Hubei Province in the Yangtze River Economic Belt Title of translation:长江经济带湖北省人为源VOCs排放清单及变化特征 Authors:Dai, Ling-Wen (1, 2); Meng, Jing (2, 3); Li, Qian-Qian (2, 3); Shi, Bin (2, 3); Su, Gui-Jin (2, 3); Huang, Li-Hong (1) Author affiliation:(1) College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu; 610059, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding authors:Su, Gui-Jin(gjsu@rcees.ac.cn); Huang, Li-Hong(huanglihong06@cdut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1039-1052 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, a 2018 anthropogenic volatile organic compounds (VOCs) emission inventory in Hubei Province was conducted using the emission factor method based on activity levels of five sources. The emission characteristics and variation trends of process sources from 2009 to 2018 were further analyzed. Total anthropogenic VOCs emissions were 6.52×105 tons in Hubei Province, accounting for about 6.41% of the country's total omissions. The contributions of fossil combustion sources, process sources, solvent sources, mobile sources, and waste disposal sources were 3.26%, 76.39%, 4.54%, 14.72%, and 1.09%, respectively. Process sources involving 45 sub-categories of nine industries accounted for a significant proportion of VOCs emissions, with Wuhan and Yichang recording the highest VOCs emission levels. The VOCs emissions intensity of each city and state were analyzed based the level of economic activity and territorial area. Tianmen and Shennongjia had higher VOCs emissions per unit of GDP, while Wuhan, Ezhou, and Tianmen had higher VOCs emissions per unit area. Regarding process source contributions, VOCs emissions increased progressively to 2.45×105 tons in 2009 and then stabilized between 2015 and 2017 with maximum emissions of 7.01×105 tons. In 2018, VOCs emissions decreased to 4.98×105 tons. This trend was similar to national anthropogenic emissions. Two industrial sectors, namely chemical raw materials and rubber and plastics, were the main driving force with contributions of 33.85%-51.55% and 7.07%-38.13%, respectively. Among them, the production of chemicals and active pesticide and pharmaceutical ingredients played an important role in contributing to VOCs emissions, while emissions during foam plastics production varied greatly, increasing sharply to more than 2.00×104 tons in 2015-2017. Under the guidance of the relevant national and local policies, emissions from key industries were significantly reduced in Hubei Province.
© 2021, Science Press. All right reserved. Number of references:89 Main heading:Plastics industry Controlled terms:Economics - Elastomers - Volatile organic compounds - Waste disposal - Waste incineration Uncontrolled terms:Anthropogenic emissions - Chemical raw materials - Economic activities - Emission characteristics - Emission inventories - Pharmaceutical ingredients - Source contributions - Variation characteristics Classification code:452.4 Industrial Wastes Treatment and Disposal - 804.1 Organic Compounds - 818.2 Elastomers - 971 Social Sciences Numerical data indexing:Percentage 1.09e+00%, Percentage 1.47e+01%, Percentage 3.26e+00%, Percentage 3.39e+01% to 5.15e+01%, Percentage 4.54e+00%, Percentage 6.41e+00%, Percentage 7.07e+00% to 3.81e+01%, Percentage 7.64e+01% DOI:10.13227/j.hjkx.202009043 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688842 Title:Effects of Fertilization Strategies on the Cadmium Resistance of Paddy Soil Microorganisms Title of translation:不同施肥措施对水稻土壤微生物镉抗性的影响 Authors:Zheng, Kai-Kai (1, 2); Ma, Zhi-Yuan (1); Sun, Bo (1); Liang, Yu-Ting (1) Author affiliation:(1) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Liang, Yu-Ting(ytliang@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:394-402 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cadmium (Cd) is one of the commonly found heavy metal contaminants in soil and has a toxic effect on plants and humans. Understanding the Cd resistance of soil microorganisms under different fertilization regimes can provide a theoretical basis for controlling heavy metal pollution by organic fertilizers. In order to investigate the effects of inorganic and organic fertilizers on the Cd resistance level of soil microorganisms, paddy soil samples were taken in Changzhou, Shanggao, and Fuzhou. A functional gene array (GeoChip 5.0) was used to investigate the distribution of microbial Cd resistance genes. The results indicated that the content of available Cd in soil with organic fertilizer [(1.08±0.70) mg•kg-1] was significantly lower than that in soils with inorganic fertilizer [(3.75±1.22) mg•kg-1](P<0.05). A total of 639 Cd resistance genes were detected. The abundance of microbial Cd resistance gene in soil with organic fertilizer was higher than that of inorganic soil. The content of available Cd, moisture content, pH, and ammonium nitrogen were important environmental factors affecting the distribution of Cd resistant microorganisms. Analysis of the molecular ecological network of Cd resistant microorganisms showed that pH, moisture content, and the effective state of the Cd content were the main factors affecting the potential interaction of functional microorganisms with inorganic fertilizer, and the main factors were total potassium and moisture content with organic fertilizer. Compared with inorganic fertilizers, the application of organic fertilizers can improve the Cd resistance level of microorganisms in soil and promote positive relationships among Cd resistant soil microorganisms.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Fertilizers Controlled terms:Cadmium - Genes - Microorganisms - Moisture - Moisture determination - Soils Uncontrolled terms:Cadmium resistance - Ecological networks - Environmental factors - Heavy metal pollution - Inorganic fertilizers - Metal contaminants - Organic fertilizers - Soil micro-organisms Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 944.2 Moisture Measurements DOI:10.13227/j.hjkx.202006154 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688812 Title:Effects of Microplastics on Embryo Hatching and Intestinal Accumulation in Larval Zebrafish Danio rerio Title of translation:微塑料对斑马鱼胚胎孵化影响及其在幼鱼肠道中的积累 Authors:Zhao, Jia (1, 2); Rao, Ben-Qiang (2); Guo, Xiu-Mei (2); Gao, Jin-Yong (3) Author affiliation:(1) School of Education, Xinyang University, Xinyang; 464000, China; (2) College of Life Sciences, Xinyang Normal University, Xinyang; 464000, China; (3) School of Technology, Xinyang University, Xinyang; 464000, China Corresponding author:Rao, Ben-Qiang(rbqxy@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:485-491 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Microplastics have been frequently detected in aquatic environments, and there are increasing concerns about the potential effects on aquatic organisms. In this study, the effects on hatching and the intestinal accumulation in embryos and larvae exposed to two sizes of polystyrene (PS) microplastics were evaluated. The two PS were green fluorescent polyethylene microplastics with 10 μm size (10GF-PM) and red fluorescent polystyrene microplastics with 0.5 μm size (0.5RF-PM). The results showed no significant difference between hatching rates compared with that of the control group of Danio rerio embryos after exposure for three days at 10-500 mg•L-1 10GF-PM, while the incubation rate was 37% at 500 mg•L-1 0.5RF-PM. The average survival rates of five day post fertilization larvae exposed to 10, 100, 200, and 500 mg•L-1 10GF-PM solutions were 80%, 54%, 44%, and 41%, and were 62%, 37%, 25%, and 12% in corresponding concentration of 0.5RF-PM solutions. A quantitative fluorescence analysis showed that the accumulation of 10GF-PM and 0.5RF-PM in larval intestines increased with the increase in the microplastic concentration, and the fluorescence values were 0.06, 0.53, and 1.84 and 0.63, 2.32, and 3.45 after exposure to 10, 100, and 500 mg•L-1 10GF-PM and 0.5RF-PM solutions for 0.5 h, and were 0.03, 0.08, and 0.56 and 0.06, 0.41, and 1.56 after transferred larval to clear water for 24 h, respectively. The negative effect of microplastics on zebrafish was related to the concentration and particle size: the higher the concentration, the lower the embryo hatching rates; the smaller the particle size, the easier it was to accumulate in the intestines.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Microplastic Controlled terms:Aquatic organisms - Fluorescence - Particle size - Particle size analysis - Polystyrenes Uncontrolled terms:Aquatic environments - Control groups - Fluorescence analysis - Hatching rates - Post-fertilization - Potential effects - Red fluorescent - Zebrafish danio rerio Classification code:471 Marine Science and Oceanography - 741.1 Light/Optics - 815.1.1 Organic Polymers - 951 Materials Science Numerical data indexing:Percentage 1.20e+01%, Percentage 2.50e+01%, Percentage 3.70e+01%, Percentage 4.10e+01%, Percentage 4.40e+01%, Percentage 5.40e+01%, Percentage 6.20e+01%, Percentage 8.00e+01%, Size 1.00e-05m, Size 5.00e-07m, Time 1.80e+03s, Time 8.64e+04s DOI:10.13227/j.hjkx.202003199 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126236 Title:Concentration Levels and Potential Ecological Risks of Current Use Pesticides in the Surface Seawater of Typical Liaoning Sea Areas Title of translation:辽宁典型海域表层海水中在用化学农药浓度水平与潜在生态风险 Authors:Du, Jing (1); Hu, Chao-Kui (1); Xie, Huai-Jun (2); Tian, Jia-Shen (1); Li, Ai (1); Xie, Qing (2); Wu, Jin-Hao (1); Song, Lun (1) Author affiliation:(1) Key Laboratory of Marine Biological Resources and Ecology, Liaoning Ocean and Fisheries Science Research Institute, Dalian; 116023, China; (2) School of Environmental Science and Technology, Dalian University of Technology, Dalian; 116024, China Corresponding author:Song, Lun(songlun2019@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1772-1780 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fourteen current-use pesticides (CUPs) in the surface seawaters of the typical Liaoning sea areas were analyzed using HPLC-MS/MS. The concentrations, distribution, and ecological risks were studied, as well as their source appointments using principal component analysis (PCA). The results revealed that seven types of CUPs were detected in the surface seawaters of the typical Liaoning sea areas. The total concentrations of these CUPs ranged from 16.7 ng•L-1 to 176.1 ng•L-1. The samples with high concentrations were collected mostly from the estuary, and the concentrations of CUPs in the western Liaodong Bay were generally higher than those in the northeastern Yellow Sea. Atrazine and triadimenol were the predominant CUPs, and their contribution rates accounted for 56.0% and 34.5%, respectively. The PCA results indicated that six types of CUPs might be caused by the runoff from farmlands and the wastewater discharge from the chemical pesticide factory, and fruit planting could be a substantial contributor to the single component acetochlor. Atrazine and acetochlor posed medium-high ecological risks to the microalgae, while all the seven types of CUPs showed relatively lower risks to invertebrates and fish.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Risk assessment Controlled terms:Ecology - Herbicides - Seawater Uncontrolled terms:Chemical pesticides - Concentration levels - Contribution rate - Current-use pesticides - Potential ecological risk - Single components - Surface seawater - Wastewater discharge Classification code:454.3 Ecology and Ecosystems - 471.4 Seawater, Tides and Waves - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.67e-08kg/m3 to 1.76e-07kg/m3, Percentage 3.45e+01%, Percentage 5.60e+01% DOI:10.13227/j.hjkx.202008125 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247525 Title:Functional Stability and Applicability of Heavy Metal Passivators in Reducing Cd Uptake by Lettuce Title of translation:重金属钝化剂阻控生菜Cd吸收的功能稳定性和适用性 Authors:Pang, Fa-Hu (1); Wu, Xue-Jiao (1); Kong, Xue-Fei (1); Zeng, Chong (1); Wang, Xiao-Yu (1); Chen, Zhao-Jin (1); Yao, Lun-Guang (1); Han, Hui (1, 2) Author affiliation:(1) Collaborative Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, College of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang; 473061, China; (2) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China Corresponding author:Han, Hui(17657311626@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2502-2511 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The use of heavy metal passivators to prevent vegetables from absorbing heavy metals is an important measure to control heavy metal-polluted vegetable fields and to ensure the safe production of vegetables. A pot experiment of planting three times in succession was conducted to study the effects of Bacillus megaterium N3 (N3), rice husk biochar (BC), sheep manure organic fertilizer (SM), strain N3 combined with biochar (BC+N3), and strain N3 combined with sheep manure (SM+N3) on Cd uptake and the functional stability of lettuce using a heavy metal passivator only at the first planting. The comprehensive applicability of the passivation materials was evaluated by the dynamic weighted comprehensive function. The results showed that when lettuce was planted for the first time, compared with the control, all the heavy metal passivators could significantly reduce (61.2%-81%) the Cd content in the edible part of the lettuce. However, in the third cultivation of lettuce, only SM+N3 could significantly reduce the Cd uptake by lettuce, which indicated that SM+N3 had the best functional stability. The dynamic weighted comprehensive function was used to evaluate the Cd content in the edible part of fresh lettuce, available Cd content in the soil, yield, and remediation cost. The results showed that the comprehensive applicability of SM+N3 was the best, followed by that of SM, BC+N3, and BC, and the comprehensive evaluation effect of strain N3 was the worst. The results of this study provide a theoretical basis and technical support for remediation of heavy metal-contaminated vegetable fields.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Heavy metals Controlled terms:Bacteriology - Fertilizers - Function evaluation - Manures - Vegetables Uncontrolled terms:Bacillus megaterium - Comprehensive evaluation - Contaminated vegetables - Metal passivators - Organic fertilizers - Passivation materials - Rice husk biochar - Technical support Classification code:531 Metallurgy and Metallography - 804 Chemical Products Generally - 821.4 Agricultural Products - 821.5 Agricultural Wastes - 921.6 Numerical Methods Numerical data indexing:Percentage 6.12e+01% to 8.10e+01% DOI:10.13227/j.hjkx.202010080 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404246 Title:Wastewater Treatment Effects of Ferric-carbon Micro-electrolysis and Zeolite in Constructed Wetlands Title of translation:铁碳微电解及沸石组合人工湿地的废水处理效果 Authors:Zhao, Zhong-Jing (1); Hao, Qing-Ju (1, 2); Zhang, Yao-Yu (1); Xiong, Wei-Xia (1); Zeng, Wei (1); Chen, Jun-Jiang (1); Jiang, Chang-Sheng (1, 2) Author affiliation:(1) State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, College of Resources and Environment, Southwest University, Chongqing; 400716, China; (2) Key Laboratory of Eco-environment in the Three Gorges Reservoir Region, Ministry of Education, Chongqing; 400715, China Corresponding author:Jiang, Chang-Sheng(jiangcs@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2875-2884 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Ferric-carbon micro-electrolysis fillers and zeolite have been increasingly used as substrates in constructed wetlands due to their good wastewater pollution-removal efficiencies. To explore the effects of different fillers on wastewater treatment in constructed wetlands, four constructed wetlands were examined with vertical subsurface flow areas filled with ferric-carbon micro-electrolysis filler+gravel (CW-A), ferric-carbon micro-electrolysis filler+zeolite (CW-B), zeolite (CW-C), and gravel (CW-D). In addition, intermittent aeration was used to improve the dissolved oxygen (DO) environment. The results showed that, compared with CW-D, the ferric-carbon micro-electrolysis filler significantly increased the dissolved oxygen (DO, P<0.05) and pH (P<0.05) of the effluent from the wetlands. The mean removal efficiency of chemical oxygen demand (COD) in the four constructed wetlands were more than 95% (P>0.05). For TN, the mean removal efficiency of CW-A,-B, and-C was 7.94% (P<0.05), 9.29% (P<0.05), and 3.63% (P<0.05) higher than that of CW-D, respectively. The contribution of ferric-carbon micro-electrolysis filler and zeolite to improving the TN removal efficiency of the constructed wetlands was 73.55% and 26.45%, respectively. The mean removal efficiency of NH4+ in the four wetlands ranged from 67.93% to 76.90%, and compared with CW-D, the other treatments significantly improved the removal efficiency of NH4+ (P<0.05). The ferric-carbon micro-electrolysis filler had an excellent removal effect on NO3-, with a removal efficiency of more than 99%, which was significantly higher than the constructed wetlands without ferric-carbon micro-electrolysis (P<0.05). Considering the treatment effect of the organic pollutants and the nitrogen-containing pollutants, CW-B achieved the best removal efficiency in constructed wetlands with intermittent aeration.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Wetlands Controlled terms:Biochemical oxygen demand - Carbon - Dissolved oxygen - Efficiency - Effluents - Electrolysis - Fillers - Gravel - Nitrogen removal - Organic pollutants - Wastewater treatment - Zeolites Uncontrolled terms:Constructed wetlands - Intermittent aeration - Removal effects - Removal efficiencies - Treatment effects - Vertical subsurface flows - Wastewater pollution removal Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 801.4.1 Electrochemistry - 804 Chemical Products Generally - 913.1 Production Engineering Numerical data indexing:Percentage 2.64e+01%, Percentage 6.79e+01% to 7.69e+01%, Percentage 7.35e+01%, Percentage 9.90e+01% DOI:10.13227/j.hjkx.202010200 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582269 Title:Distribution and Removal of Antibiotic-Resistant Bacteria and Antibiotic Resistance Genes in Petrochemical Wastewater Treatment Plants Title of translation:石化废水处理厂中耐药菌和耐药基因的分布特征与去除效能解析 Authors:Tang, Zhen-Ping (1, 2); Xiao, Sha-Sha (3); Duan, Yi (1, 3); Liu, Yin-Jiu (1, 3); Gao, Yuan-Yuan (3); Wu, Yue-Yue (4); Chen, Yi-Wen (4); Zhou, Shuai (1, 3) Author affiliation:(1) Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology, University of South China, Hengyang; 421001, China; (2) Hunan Key Laboratory of Rare Metal Minerals Exploitation and Geological Disposal of Wastes, Hengyang; 421001, China; (3) School of Civil Engineering, University of South China, Hengyang; 421001, China; (4) Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang; 421001, China Corresponding author:Zhou, Shuai(zs402606665@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3375-3384 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A petrochemical wastewater treatment plant (PWWTP) was selected to investigate the distribution and removal of antibiotic-resistant bacteria (ARB) and three forms of antibiotic resistance genes (ARGs), namely intracellular ARGs (iARGs), adsorbed-extracellular ARGs (aeARGs), and free extracellular ARGs (feARGs). Tetracycline, sulfanilamide, and ampicillin ARB were detected with the total absolute concentration of 8.45×102-2.38×105 CFU•mL-1; the absolute concentrations of three types of ARB decreased by 0.04 lg-0.21 lg through anaerobic treatment. The effect of aeration and precipitation treatment on ARB varies with its type, and the absolute concentration of ARB in effluent was 0.12 lg-0.63 lg higher than that in influent. The absolute abundance of aeARGs and iARGs in activated sludge was 1.96×107-3.02×1010 copies•g-1 and 5.22×107-4.15×1010 copies•g-1, respectively; the absolute abundance of feARGs in wastewater was 5.90×108-1.01×1012 copies•L-1. Anaerobic treatment can remove 0.13 lg-0.65 lg aeARGs and 0.04 lg-0.28 lg iARGs, while the removal efficiency of aeARGs and iARGs by aeration and precipitation process was affected by ARGs types and forms. The absolute abundance of feARGs in effluent is 0.06 lg-0.81 lg higher than that in influent. Redundancy analysis showed that the concentration of ARB was significantly positively correlated with chemical oxygen demand (COD), Cl-, and total nitrogen concentration (P<0.05). The abundance of aeARGs was positively correlated with COD and total nitrogen concentration (P<0.05), and both the abundance of iARGs and feARGs are positively correlated with heavy metals concentration (P<0.05). This study confirmed the enrichment risk of ARB and different forms of ARGs in PWWTPs, which provided references for the research and prevention of antibiotic resistance pollution in industrial wastewater.
© 2021, Science Press. All right reserved. Number of references:62 Main heading:Sewage treatment plants Controlled terms:Antibiotics - Bacteria - Chemical oxygen demand - Effluent treatment - Effluents - Genes - Heavy metals - Industrial research - Nitrogen - Petrochemicals - Precipitation (chemical) - Sewage pumping plants - Wastewater treatment - Water treatment plants Uncontrolled terms:Antibiotic resistance - Antibiotic resistance genes - Antibiotic-resistant bacteria - Industrial wastewaters - Metals concentrations - Petrochemical wastewater - Precipitation process - Removal efficiencies Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 531 Metallurgy and Metallography - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 901.3 Engineering Research DOI:10.13227/j.hjkx.202012037 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650995 Title:Ecological Effects of Species Diversity on Plant Growth and Physico-Chemical Properties in a Pb-Zn Mine Tailings Title of translation:物种多样性对铅锌尾矿废弃地植被及土壤的生态效应 Authors:Yang, Sheng-Xiang (1, 2); Cao, Jian-Bing (3); Li, Feng-Mei (2); Peng, Xi-Zhu (2) Author affiliation:(1) College of Resources and Environment, Zunyi Normal University, Zunyi; 563006, China; (2) College of Biology and Environmental Sciences, Jishou University, Jishou; 416000, China; (3) Ecology and Environment Bureau of Xiangxi Tujiazu & Miaozu Autonomous Prefecture, Jishou; 416000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3953-3962 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The remediation of metalliferous mine tailings remains a challenge in many regions of the world. A field experiment was conducted on representative Pb-Zn mine tailings with different species richness (1-, 4-, 8-, and 16-species) to evaluate the potential roles of species diversity in the phytoremediation of metalliferous mine tailings. The main results were ① high species diversity greatly enhanced vegetation cover and biomass. For example, the average vegetation cover and biomass were 33.4% and 66.7 g•m-2 in 1-species plots and reached 78.4% and 183.8 g•m-2 in 16-species plots, respectively. ② Plant species diversity had significant effects on nutrient accumulation. Total organic carbon (TOC), water organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) significantly increased with the species diversity (TOC: r=0.30,P<0.001; SOC: r=0.20,P<0.05; TN: r=0.24,P<0.05; TP: r=0.20,P<0.05). ③ Species diversity not only reduced the concentration of diethylenetriamine pentaacetate (DTPA)-extracted metals in the mine tailings, but also decreased heavy metal transfer and accumulation in the soil-plant system. With enhanced species diversity, DTPA-extracted Cd, Cu, Pb, and Zn decreased significantly (DTPA-Cd: r=0.20,P<0.05; DTPA-Cu: r=0.19, P<0.05; DTPA-Pb: r=0.23, P<0.05; DTPA-Zn: r=0.23, P<0.05). With increasing species diversity, a slightly decreasing trend was observed for Cd, Cu, Pb, and Zn concentrations in the aboveground parts of plants (Cd: r=-0.16, P<0.01; Cu: r=-0.23, P<0.001; Pb: r=-0.15, P<0.05; Zn: r=-0.18, P<0.001). In conclusion, plant diversity can play an important role in mine reclamation.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Lead alloys Controlled terms:Binary alloys - Biodiversity - Bioremediation - Forestry - Heavy metals - Organic carbon - Soil pollution - Tailings - Vegetation - Zinc - Zinc alloys Uncontrolled terms:Diethylenetriamine - Ecological effect - Heavy metal transfer - Nutrient accumulation - Plant species diversity - Soil plant systems - Total Organic Carbon - Total phosphorus Classification code:452.3 Industrial Wastes - 454 Environmental Engineering - 454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 546.1 Lead and Alloys - 546.3 Zinc and Alloys - 804.1 Organic Compounds Numerical data indexing:Percentage 3.34e+01%, Percentage 7.84e+01% DOI:10.13227/j.hjkx.202012230 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003447 Title:Application Case of Accurate Site Investigation with Life-Cycle Conceptual Site Model Development Title of translation:基于全周期场地概念模型的场地环境精准调查应用案例 Authors:Li, Pei-Zhong (1); Wu, Nai-Jin (1); Wang, Hai-Jian (1); Zhang, Ji (1); Rong, Li-Ming (1); Li, Xiang (1); Wei, Wen-Xia (1); Song, Yun (1) Author affiliation:(1) Beijing Key Laboratory of Industrial Land Contamination and Remediation, Environmental Protection Research Institute of Light Industrial, Beijing; 100089, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1123-1130 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A life cycle conceptual site model (LC-CSM) can represent the actual spatial distribution and migration of pollution of a site very accurately and be beneficial in supporting decisions for accurate site remediation or risk management. A volatile chlorinated hydrocarbon contaminated site in the Beijing-Tianjin-Hebei region was chosen as the study case. LC-CSMs were established following the site assessment, preliminary investigation, detailed investigation, and supplementary investigation of each stage. The application of field screening tests such as a membrane interface probe and the multi-electrode resistivity method assisted in identifying potential pollution sources and hot points. Concurrently, a large amount of vinyl chloride, the end product of chlorinated hydrocarbon degradation, was detected in some boreholes, indicating that pollutant biodegradation had occurred at this site. Some typical boreholes and cross-sections were chosen to analyze the biodegradation indicators and chemical fingerprints, combining the results of the comprehensive score of chlorinated hydrocarbon anaerobic biodegradability in groundwater reaching 22. It is judged that the site has strong anaerobic biodegradability. This step-by-step optimization forms an LC-CSM for site investigation, which provides scientific support for accurate site characterization.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Life cycle Controlled terms:Artificial life - Biodegradability - Biodegradation - Boreholes - Chemical analysis - Chlorine compounds - Groundwater - Hydrocarbons - Indicators (chemical) - Pollution - Risk management Uncontrolled terms:Anaerobic biodegradability - Beijing-tianjin-hebei regions - Chemical fingerprint - Chlorinated hydrocarbon - Conceptual site models - Potential pollutions - Site characterization - Volatile chlorinated hydrocarbons Classification code:444.2 Groundwater - 801 Chemistry - 801.2 Biochemistry - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202011011 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945469 Title:Research Progress in the Odorants and Their Emissions from Indoor Building Decoration Materials Title of translation:室内建筑装饰装修材料气味物质及其释放研究进展 Authors:Zhang, Wan-Zhong (1); Zhang, Peng-Yi (1, 2) Author affiliation:(1) State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China; (2) Beijing Key Laboratory for Indoor Air Quality Evaluation and Control, Beijing; 100084, China Corresponding authors:Zhang, Peng-Yi(zpy@tsinghua.edu.cn); Zhang, Peng-Yi(zpy@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:5046-5058 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The emission of pollutants from building decoration and furbishing materials associated with unpleasant odors is the main reason for complaints relating to poor quality indoor air. Currently, few studies have focused on the identification of odorants and the quantification of emissions from these building materials. Here, we summarize the analytical methods available for the study of indoor odorants and evaluate existing understanding of odorants from nine kinds of building materials, namely plaster board, wood-based materials, linoleum, carpets, plastics, rubber, artificial leather, paints, and adhesives. The possible odor-causing compounds emitted by these different materials and their odor threshold values are identified. Finally, suggestions are proposed for future research and control measures to minimize indoor odor pollution. Overall, olfactometry is the most important tool for odor analysis desite the non-standardized application of the technique when used in the assessment of odor emissions from building materials. In addition, there are large differences in the reported patterns of odorant emissions from building materials, although oxidized substances such as aldehydes, ketones, and acids are frequently identified in association with the aging of the materials via processes such as oxidation and ozone degradation over time.
© 2021, Science Press. All right reserved. Number of references:124 Main heading:Secondary emission Controlled terms:Adhesives - Air quality - Building materials - Buildings - Indoor air pollution - Ketones - Odors - Ozone - Pollution control - Volatile organic compounds Uncontrolled terms:Analytical method - Buildings materials - Control measures - Odor analysis - Odor pollution - Odor thresholds - Odour emissions - Plaster board - Threshold-value - Wood-based materials Classification code:402 Buildings and Towers - 451 Air Pollution - 451.2 Air Pollution Control - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202101284 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945337 Title:Seasonal Variation and Influencing Factor Analysis of Antibiotic Resistance Genes in Water Supply Reservoirs of Central China Title of translation:华中地区供水水库抗生素抗性基因的季节变化及影响因素 Authors:Zhang, Kai (1); Xin, Rui (2); Li, Kuang-Jia (3); Wang, Qian (1); Wang, Ya-Nan (1); Xu, Zhi-Heng (1); Cui, Xiang-Chao (1); Wei, Wei (1) Author affiliation:(1) Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution, School of Geographic Sciences, Xinyang Normal University, Xinyang; 464000, China; (2) School of Marine Science and Technology, Tianjin University, Tianjin; 300350, China; (3) Development Research Center, Ministry of Water Resources, Beijing; 100038, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4753-4760 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study quantified an integron gene intI1 and 19 antibiotic resistance genes(ARGs)to identify the ARGs pollution characteristics in 11 drinking water reservoirs of central China. The results indicated that the ARGs abundance did not change significantly over time in the studied reservoir waterbodies. Tetracycline, sulfonamide, and β-lactam ARGs were dominant. The high abundance and detection rate of two sulfonamide ARGs(sul1 and sul2)suggested that they were the predominant ARGs. No polymyxin resistance genes(mcr-1)were detected, which indicated that the antibiotic restriction policy of China has achieved positive outcomes. Compared with that in other environmental media, the ARGs abundance in the reservoir environment was low. The correlation analysis showed relevance between the water quality indicators and the ARGs, which suggested that the water quality indexes can be used as ARGs pollution indicators in the reservoir environment. The abundance and detection rate of carbapenem ARGs were low owing to their dosage restriction and high degradability. Tetracycline ARGs were closely related to the other resistance gene types, which might have been due to horizontal gene transfer. Although the overall correlation between intI1 and ARGs was modest, it might be the main reason for the spread of several individual ARGs in the reservoir environment.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Reservoirs (water) Controlled terms:Antibiotics - Gene transfer - Genes - Potable water - Sulfur compounds - Water pollution - Water quality - Water supply Uncontrolled terms:Antibiotic resistance genes - Central chinas - Detection rates - Drinking water reservoirs - Influencing factor - Influencing factors analysis - Integrons - Resistance genes - Seasonal variation - Water supply reservoirs Classification code:441.2 Reservoirs - 444 Water Resources - 445.2 Water Analysis - 446.1 Water Supply Systems - 453 Water Pollution - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 461.8.1 Genetic Engineering DOI:10.13227/j.hjkx.202102127 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247458 Title:In-situ Sludge Reduction Technology Based on Ozonation Title of translation:基于臭氧旁路处理的污泥原位减量技术工艺 Authors:Xue, Bing (1); Liu, Bin-Han (1); Wei, Ting-Ting (1); Wang, Xian-Kai (2); Chen, Si-Si (1, 2); Dong, Bin (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (2) China Three Gorges Corporation, Beijing; 100038, China Corresponding author:Chen, Si-Si(chensisi@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2402-2412 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The process parameters and sludge properties of an in-situ sludge ozone-reduction system were investigated under different ozone dosages and sludge ages. Subsequently, 75 mg•g-1 (as O3/MLVSS) was selected as the appropriate ozone dosage to satisfy the wastewater treatment capacity and in-situ sludge ozone-reduction. The calibration coefficient results of the sludge yield formula indicated that Yh was reduced from 0.331 g•g-1 to 0.326 g•g-1 (to MLVSS/COD m) by ozone treatment and Kd was increased from 0.046 d-1 to 0.050 d-1 at 75 mg•g-1. The effluent quality of the SBR system was satisfactory when the sludge age was 10 d. The ozone dosage of 75 mg•g-1 and sludge age of 10 d were selected as the appropriate process conditions, at which the excess sludge was reduced by 12%. The high-throughput sequencing results concluded that the microorganisms in the excess sludge after ozonation were different in phylum and genus. After ozone treatment, the abundance of Bacteroidetes increased by 1.2 times and the relative abundance of Proteobacteria with nitrification and denitrification ability decreased from 24% to 18%. The reduction in the abundance of nitrobacteria affected the denitrification capacity of the sewage treatment system, but the total effluent nitrogen still met the I B discharge standard of pollutants for municipal wastewater treatment plants. The relative abundance of Lactococcus increased from 0.4% to 21.6%. Simultaneously, the concentration of macromolecular organic substances in the EPS of the excess sludge increased from 40.6 mg•g-1 to 54.6 mg•g-1, while the CST increased from 15 s to 17 s after ozone treatment. The zeta potential decreased from -10.04 mV to -15.20 mV and the SVI of the excess sludge increased from 54 mL•g-1 to 62 mL•g-1, thereby indicating that the sedimentation performance and dewaterability were affected to some extent. However, the SS of the effluent and the solids content of the sludge cake after extraction did not change significantly, the system could still operate stably, and the subsequent dewaterability of the excess sludge was not significantly affected.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Sewage treatment plants Controlled terms:Denitrification - Effluent treatment - Effluents - Ozone - Ozone water treatment - Ozonization - Sewage treatment - Wastewater treatment - Water quality Uncontrolled terms:Calibration coefficients - Denitrification capacity - Discharge standards - High-throughput sequencing - Municipal wastewater treatment plants - Nitrification and denitrification - Organic substances - Wastewater treatment capacity Classification code:445.2 Water Analysis - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Percentage 1.20e+01%, Percentage 2.40e+01% to 1.80e+01%, Percentage 4.00e-01% to 2.16e+01%, Specific_Volume 5.40e-02m3/kg to 6.20e-02m3/kg, Time 1.50e+01s to 1.70e+01s, Voltage -1.52e-02V DOI:10.13227/j.hjkx.202009165 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945226 Title:Removal Efficiency and Mechanism of Ammonia Nitrogen in a Low Temperature Groundwater Purification Process Title of translation:低温地下水净化工艺中氨氮去除性能及机制 Authors:Li, Dong (1); Liu, Meng-Hao (1); Zhang, Rui-Miao (2); Zeng, Hui-Ping (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin; 150090, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4826-4833 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the mechanism and efficiency of ammonia nitrogen removal, a pilot-scale biofilter for the simultaneous removal of high concentrations of iron, manganese, and ammonia nitrogen [Fe(Ⅱ)11.9-14.8 mg•L-1, Mn(Ⅱ)1.1-1.5mg•L-1, and NH4+-N 1.1-3.2 mg•L-1] from low temperature(5-6℃)groundwater was operated in a water supply plant in Northeast China. Results indicated excellent performance for ammonia nitrogen removal during the initial start-up stage. According to theoretical analysis and experimental verification, TNloss was driven by the adsorption of ammonia nitrogen by iron oxides, and the conversion of ammonia nitrogen into nitrate nitrogen occurred via biological nitrification. When the concentration of ammonia nitrogen increased, due to limited adsorption sites, the adsorption capacity of iron oxides remained stable at approximately 1 mg•L-1. For the same period, the amount of ammonia nitrogen removal via oxidation continued to increase, with higher quantities removed in the upper filter layer than in the lower filter layer. Dissolved oxygen(DO)is the limiting factor in the further increase in the removal of ammonia nitrogen by oxidation. With an increase in the filtration rate, the adsorption time of ammonia nitrogen by iron oxides was shortened, and the adsorption amount was reduced. Meanwhile, the shortening of EBCT reduced the ammonia nitrogen removed by nitrification under the action of nitrifying bacteria in the unit volume of the filter material. Based on these findings, it is recommended that the thickness of the filter layer should be increased to improve ammonia nitrogen removal performance.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Nitrification Controlled terms:Ammonia - Bacteria - Biochemical oxygen demand - Dissolved oxygen - Gas adsorption - Groundwater - Iron oxides - Manganese - Manganese removal (water treatment) - Nitrogen removal - Temperature - Water supply Uncontrolled terms:Ammonia-nitrogen - Ammonia-nitrogen removals - Biological nitrification - Filter layers - Groundwater treatment - High concentration of iron and manganese - Lows-temperatures - Purification process - Removal efficiencies - Removal mechanism Classification code:444.2 Groundwater - 445.1 Water Treatment Techniques - 446.1 Water Supply Systems - 543.2 Manganese and Alloys - 641.1 Thermodynamics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.2 Inorganic Compounds Numerical data indexing:Mass 1.00E-06kg, Mass 1.10E-06kg to 1.50E-06kg, Mass 1.10E-06kg to 3.20E-06kg, Mass 1.19E-05kg to 1.48E-05kg DOI:10.13227/j.hjkx.202102181 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945123 Title:Effects of Combination of Organic and Inorganic Nitrogen on Nitrification and Denitrification in Two Salinized Soils Title of translation:有机无机氮配施对不同程度盐渍土硝化和反硝化作用的影响 Authors:Zhou, Hui (1, 2); Shi, Hai-Bin (1, 2); Zhang, Wen-Cong (1, 2); Wang, Wei-Gang (1, 2); Su, Yong-De (1, 2); Yan, Yan (1, 2) Author affiliation:(1) College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot; 010018, China; (2) Institute of Water-saving Agricultural and Soil-water Environment in Arid Area, Inner Mongolia Agricultural University, Hohhot; 010018, China Corresponding authors:Shi, Hai-Bin(shb@imau.edu.cn); Shi, Hai-Bin(shb@imau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:5010-5020 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Focusing on typical mildly saline soil, S1 (EC, 0.62 dS•m-1), and moderately saline soil, S2 (EC, 1.17 dS•m-1), in Hetao Irrigation District of Inner Mongolia, the response of nitrification and denitrification process to salinization degree and the proportion of organic and inorganic nitrogen application were studied. The experimental treatments consisted of(1)no nitrogen(CK), (2)only inorganic nitrogen(U1), and(3)organic nitrogen(U3O1, U1O1, U1O3, and O1)compared to 25%, 50%, 75%, and 100% inorganic nitrogen. The results showed that increasing salinity reduced the soil nitrification potential and increased the soil denitrification capacity. The soil nitrification potential of the S1 soil was 28.81%-69.67% higher than that of the S2 soil, while the denitrification capacity was reduced by 17.16%-88.91%. With an increase in salinity, the AOB abundance and nitrification contribution rate were reduced, but the AOA abundance and nitrification contribution rate were increased. Furthermore, an increase in salinity increased the abundance of nirK and nirS bacteria, and increased N2O/(N2O+N2)production, but reduced the abundance of nosZ. In the S1 soil, the nitrification potential and denitrification capacity of U1O1 were highest, increasing by as much as 18.59% and 15.87%, respectively, compared to the U1 treatment. In the S2 soil, the difference in the soil nitrification potential between the various fertilization treatments was not significant, and the denitrification capacity of the O1 treatment was highest. The S1 and S2 saline soils treated with U1O1 and O1, respectively, had higher AOB gene abundance and nitrification contribution rates, increased nirS and nosZ gene abundances, and significantly reduced N2O/(N2O+N2)product ratios. Our findings suggested that mildly saline soils(120 kg•hm-2 urea+120 kg•hm-2 organic fertilizer)and moderately saline soils(240 kg•hm-2 organic fertilizer)are more conducive to soil nitrification and denitrification processes compared to soils to which inorganic nitrogen is applied alone.
© 2021, Science Press. All right reserved. Number of references:70 Main heading:Nitrification Controlled terms:Denitrification - Fertilizers - Genes - Microorganisms - Soils - Urea Uncontrolled terms:Combined application of organic-inorganic nitrogen - Denitrification capacity - Function microorganism - Inorganic nitrogen - Nitrification and denitrification - Nitrification potential - Organic nitrogen - Organic/inorganic - Saline soil - Salinity soil Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.2 Agricultural Chemicals Numerical data indexing:Mass 1.20E+02kg, Mass 2.40E+02kg, Percentage 1.00E+02%, Percentage 1.587E+01%, Percentage 1.716E+01% to 8.891E+01%, Percentage 1.859E+01%, Percentage 2.50E+01%, Percentage 2.881E+01% to 6.967E+01%, Percentage 5.00E+01%, Percentage 7.50E+01% DOI:10.13227/j.hjkx.202103013 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066044 Title:Effects of Nano-membrane on Aerobic Composting Process and Odor Emission of Livestock Manure Title of translation:纳米膜覆盖对畜禽粪便好氧堆肥进程及恶臭气体排放的影响 Authors:Li, Yong-Shuang (1); Sun, Bo (2, 3); Chen, Ju-Hong (4, 5); Peng, Xia-Wei (1); Bai, Zhi-Hui (2, 3); Zhuang, Xu-Liang (2, 3) Author affiliation:(1) College of Biological Sciences and Technology, Beijing Forestry University, Beijing; 100083, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) College of Plant Protection, Jilin Agricultural University, Changchun; 130118, China; (5) Beijing Huachen Jiguang Technology Co., Ltd., Beijing; 101407, China Corresponding authors:Peng, Xia-Wei(pengxw@bjfu.edu.cn); Bai, Zhi-Hui(zhbai@rcees.ac.cn); Bai, Zhi-Hui(zhbai@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5554-5562 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Aerobic composting is an important approach to treat livestock manure; however, traditional composting has some problems, such as low efficiency, or odorous pollution. In order to speed up the composting process and reduce malodorous gas emissions, this study explored the mechanism of nano-membrane for improving the efficiency of livestock manure composting. A trough aerobic composting experiment was set up to evaluate the physicochemical properties, enzyme activities, and emission of odorous gases. The results showed that covering with nano-membrane could accelerate the temperature rise; reduce the pH, organic matter(OM), and ammonia nitrogen(NH4+-N); increase electrical conductivity(EC); enhance the activities of urease, protease, cellulase, xylanase, and peroxidase; while the total cumulative emissions of NH3, H2S, and TVOC were reduced by 58%, 100%, and 61%, respectively. The correlation analysis showed that most enzyme activities were easily affected by temperature(T), EC, OM, and C/N. The emission rate of NH3 was positively correlated with T and negatively correlated with pH, and TVOC was significantly correlated with various physicochemical properties. This experiment showed that covering nano-membrane could accelerate the compost maturity and reduce the emission of odorous gases. This approach has no health risks and produces low malodorous gas, which may effectively solve the problem of pollutant emission caused by livestock manure compost fermentation, promoting the green and sustainable development of the breeding industry. In addition, it facilitates livestock manure fertilizer application, and provides technical support for the development of resource utilization of biomass waste.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Ammonia Controlled terms:Agriculture - Composting - Efficiency - Enzymes - Fertilizers - Gas emissions - Health risks - Manures - Physicochemical properties - Pollution - Waste treatment Uncontrolled terms:Aerobic composting - Composting process - Electrical conductivity - Enzymes activity - Livestock manure - Malodorous gas - Nano-membrane - Odorous gas - Organics - Physicochemical property Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.7 Health Care - 801.4 Physical Chemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.2 Agricultural Chemicals - 821.5 Agricultural Wastes - 913.1 Production Engineering Numerical data indexing:Percentage 1.00E+02%, Percentage 5.80E+01%, Percentage 6.10E+01% DOI:10.13227/j.hjkx.202103109 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945448 Title:Evaluation and Sources of Heavy Metal Pollution in the Surface Soil of the Qaidam Basin Title of translation:柴达木盆地表土重金属污染与来源分析 Authors:Chen, Liang (1, 2); X.-Y., Zhang; Q.-L., Tang; J., Geng; E.-L., Wang; J.-Y., Li Author affiliation:(1) Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining; 810008, China; (2) Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes, Xining; 810008, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4880-4888 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To understand surface soil heavy metal pollution characteristics, and the spatial distribution and sources of pollution in the main sedimentary features of the Qaidam Basin, a total of 129 topsoil samples(0-10 cm)were collected within a 25 km radius. The concentrations of As, Ba, Cr, Mn, Nb, Ni, Pb, Ti, Zn, Zr, and ten kinds of heavy metals were determined, the degree of contamination and potential sources quantitatively analyzed based on enrichment factors(EFs), the ground accumulation index(Igeo), and the absolute principal component-multiple linear regression(APCS-MLR)receptor model. The results showed that the surface soils of the Qaidam Basin have experienced pollution from ten kinds of heavy metals since the 1960s, with varying degrees of enrichment. As and Pb represent probable point source pollutants, and the basin as a whole shows negligible to low levels of pollution. The APCS-MLR analysis showed that heavy metal pollution derives from two sources, natural factors and anthropogenic(transportation)sources. Specifically, As, Cr, Mn, Nb, Ni, Ti, Zn, and Zr are associated with natural sources, while Ba and Pb are associated with both natural and anthropogenic sources.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Linear regression Controlled terms:Heavy metals - Principal component analysis - Soil pollution - Soils Uncontrolled terms:Absolute principal component-multiple linear regression(APCS-MLR) - Contamination sources - Heavy metals pollution - Natural sources - Pollution distribution - Principal Components - Qaidam basin - Soil heavy metals - Surface soil - Topsoil samples Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 922.2 Mathematical Statistics Numerical data indexing:Size 0.00E00m to 1.00E-01m, Size 2.50E+04m DOI:10.13227/j.hjkx.202101052 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239887 Title:Removal of Characteristic Pollutants in Livestock Wastewater by Horizontal Subsurface Flow Constructed Wetlands Title of translation:水平潜流人工湿地对畜禽养殖废水中特征污染物的去除 Authors:Zhao, Wei (1); Fan, Zeng-Zeng (1); Yang, Xin-Ping (1) Author affiliation:(1) College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China Corresponding author:Yang, Xin-Ping(xpyang@njau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5865-5875 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the removal efficiency of characteristic pollutants in livestock wastewater by horizontal subsurface flow constructed wetlands (CWs), this study selected tetracycline (TC) and Cu2+, a familiar antibiotic and a typical heavy metal in livestock wastewater, respectively, to build the following four groups of CWs: control (CK group), 1 mg•L-1 TC in influent (TC group), 5 mg•L-1 Cu2+ in influent (Cu group), and both 1 mg•L-1 TC and 5 mg•L-1 Cu2+ in influent ("TC+Cu" group). The average removal rates for control CWs were (84.3±7.2)% for total organic carbon (TOC), (78.6±7.0)% for total nitrogen (TN), (82.1±4.4)% for ammonia nitrogen (NH4+-N), and (88.0±6.0)% for PO43--P in a long-term operation. Compared with that in the CK group, the removal rate of TN in the TC group, Cu group, and "TC+Cu" group decreased by 0.4%-21.7%, 2.8%-25.5%, and 4.3%-27.0%, respectively, and the removal rate of NH4+-N decreased by 1.6%-15.7%, 2.5%-17.8%, and 8.4%-23.0%, respectively. TC or Cu2+ in the influent significantly inhibited the removal of TN and NH4+-N in livestock wastewater by CWs. The removal of TOC, TN, NH4+-N, and PO43--P by the CWs mainly occurred in the front section of the CWs. The removal rates for TC and Cu2+ were above 99.9% and 91.4% in the effluent of both CWs treated with TC, Cu2+ respectively and CWs treated with TC and Cu2+. The results showed that influent had a higher abundance of 11 tet genes than effluent by approximately two to three orders of magnitude through all CWs, suggesting that the CWs may play a dominant role in antibiotic resistance genes (ARGs) and the bacteria removal process. The relative abundances of seven tet genes (tetA, tetC, tetE, tetO, tetQ, tetT, and tetBp) in effluent were lower than those in influent, and seven tet genes were reduced by 43.3% (tetC)-96.3% (tetA) in the CK. Compared to that in the CK, the addition of TC or Cu2+to the influent increased the relative abundance of TRGs in the effluent of CWs. The relative abundances of TRGs in the effluent of the TC group, Cu group, and "TC+Cu" group were 12%-52%, 6.7%-51%, and 24%-82% higher, respectively, than that in the CK. These results suggest that CW is suited for livestock wastewater advanced treatment, as it provides great application prospects in the removal of antibiotics and heavy metals and the alleviation of the future risk of antibiotic resistance genes.
© 2021, Science Press. All right reserved. Number of references:53 Main heading:Wetlands Controlled terms:Agriculture - Ammonia - Antibiotics - Copper - Copper compounds - Efficiency - Effluents - Genes - Heavy metals - Nitrogen - Nitrogen removal - Organic carbon - Wastewater treatment Uncontrolled terms:Cu2+ - Horizontal subsurface flow - Horizontal subsurface flow constructed wetlands - Livestock wastewater - NH 4 + N - Relative abundance - Removal rate - Resistance genes - Tetracycline resistance gene - Total nitrogen Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 531 Metallurgy and Metallography - 544.1 Copper - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.1 Production Engineering Numerical data indexing:Mass 1.00E-06kg, Mass 5.00E-06kg, Percentage -9.63E+01%, Percentage 1.20E+01% to 5.20E+01%, Percentage 1.60E+00% to 1.57E+01%, Percentage 2.40E+01% to 8.20E+01%, Percentage 2.50E+00% to 1.78E+01%, Percentage 2.80E+00% to 2.55E+01%, Percentage 4.00E-01% to 2.17E+01%, Percentage 4.30E+00% to 2.70E+01%, Percentage 4.33E+01%, Percentage 6.70E+00% to 5.10E+01%, Percentage 8.40E+00% to 2.30E+01%, Percentage 9.14E+01%, Percentage 9.99E+01% DOI:10.13227/j.hjkx.202103208 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239877 Title:Distribution and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons and Heavy Metals in Coking Sites in China Title of translation:我国焦化场地多环芳烃和重金属分布情况及生态风险评价 Authors:Wang, Yao-Feng (1, 2); He, Lian-Sheng (1); Jiang, Deng-Ling (2); Cao, Ying (1); Li, Qiang (1); Gong, Jian (1) Author affiliation:(1) Environmental Analysis and Testing Laboratory, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan; 063210, China Corresponding author:He, Lian-Sheng(heliansheng08@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5938-5948 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Coking is a heavy industry in China, and its serious impact on the ecological environment in the production process cannot be ignored. This study collected the latest pollution data of the coking industry sites in various regions throughout China, reflecting the soil pollution status of the coking industry sites in the country as a whole. The ecological risks of the 16 polycyclic aromatic hydrocarbons (PAHs) in coke soils were evaluated and analyzed using the quality benchmark method and the toxicity equivalent method. The "Background Value of Soil Elements in China" was used as the reference standard, and the geo-accumulation index method and the potential ecological risk assessment method were used to evaluate the ecological risks. The ecological risks of various heavy metals were evaluated and analyzed. The results show that the M-ERM-Q value calculated by the quality benchmark method for coking site soils in all regions of the country was greater than 1.51, which indicates a high ecological risk, and the northern region had the highest risk level. According to the Dutch soil quality standard, the toxicity equivalent method revealed that the total toxicity equivalent concentration of 10 PAHs was greater than the Dutch standard, and thus the soil is in a polluted state. The ∑10TEQ in the northern region was much larger than the Dutch standard, which is consistent with the evaluation result of the quality standard method, which showed that Cd and Hg were the main pollutants in the coking site, and the other elements were relatively less harmful. The evaluation of potential ecological risks showed that the pollution of coking sites in northern regions is relatively serious, especially in the Shanxi and Hebei areas where the soil heavy metal damage was the most serious, reaching a strong level.
© 2021, Science Press. All right reserved. Number of references:64 Main heading:Polycyclic aromatic hydrocarbons Controlled terms:Benchmarking - Heavy metals - Quality control - Risk assessment - Soil pollution - Soils - Toxicity Uncontrolled terms:Background value - Coking site - Ecological environments - Ecological risk assessment - Ecological risks - Heavy industries - Northern regions - Potential ecological risk - Production process - Quality standard Classification code:461.7 Health Care - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202105239 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239890 Title:Analysis of Nitrate Pollution Sources Under Different Rainfall Conditions Based on δ15N and δ18O Values Title of translation:基于氮氧同位素解析不同降雨条件下硝酸盐污染源 Authors:Xing, Zi-Kang (1, 2, 3); Yu, Zhong-Bo (1, 2, 3); Yi, Peng (1, 2, 3); Qian, Rui-Zhi (4); Wang, Jia-Yi (5) Author affiliation:(1) State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing; 210098, China; (2) Joint International Research Laboratory of Global Change and Water Cycle, Hohai University, Nanjing; 210098, China; (3) Yangtze Institute for Conservation and Development, Hohai University, Nanjing; 210098, China; (4) Jiangsu Province Hydrology and Water Resources Investigation Bureau, Yangzhou; 225000, China; (5) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing; 210098, China Corresponding authors:Yi, Peng(pengyi1915@163.com); Yi, Peng(pengyi1915@163.com); Yi, Peng(pengyi1915@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5796-5803 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Due to the process of urbanization and the increase in human activities, high nitrate pollution poses a great threat to the surface water quality. Recent analyses of nitrate sources have only emphasized the seasonal variation of the source, rarely considering the impact of precipitation events on the composition of pollution sources. This study selected the Tongyang Canal in Jiangdu District, Yangzhou City, as the research object. Nitrogen and oxygen isotope technology and the stable isotope analysis in R (SIAR) model were used to calculate the contributions of different nitrate sources under different precipitation conditions. The results showed that: ① The concentration of pollutants in each section of the Tongyang Canal had strong spatial variability. The concentration of NO-3and NH4+ had a similar spatial distribution (middle>downstream>upstream). The high level of urbanization in the middle reach increased the input of nitrogen. ② Precipitation increased the uncertainty of the concentration in various sections, and the erosion and dilution effects brought via precipitation generally increased ρ(NO3-), ρ(NH4+), ρ(Cl-), and ρ(SO42-). ③ Under the conditions of no and low rainfall, the NO3- of the Tongyang Canal mainly came from atmospheric deposition (contribution rate of 27% to 47%) and soil organic nitrogen (contribution rate of 21% to 29%). Influenced by rainfall events, chemical fertilizers (with a contribution rate of 16% to 34%) became the most important source. The changes in pollution sources caused by rainfall were spatially different. The contribution rate of chemical fertilizers and soil organic nitrogen in the downstream reach (agricultural area) increased more significantly than that in the upper and middle reach. ④ There was strong denitrification in the downstream area, and nitrification and denitrification were more likely to occur under low rainfall conditions.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Nitrates Controlled terms:Chemical analysis - Denitrification - Isotopes - Meteorological problems - Oxygen - Rain - River pollution - Rivers - Water quality Uncontrolled terms:Contribution rate - Nitrate pollution - Nitrate sources - Nitrogen and oxygen isotopes - Pollution sources - Rainfall condition - Source analysis - Stable isotope analyse in R - Stable-isotope analysis - Tongyang canal Classification code:443.1 Atmospheric Properties - 443.3 Precipitation - 445.2 Water Analysis - 453 Water Pollution - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Force 1.50E+01N, Percentage 1.60E+01% to 3.40E+01%, Percentage 2.10E+01% to 2.90E+01%, Percentage 2.70E+01% to 4.70E+01% DOI:10.13227/j.hjkx.202104052 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066042 Title:Fabrication of Supported Titanium Xerogel Adsorbent and Performance Evaluation for Arsenite Removal Title of translation:负载型钛凝胶的制备及其吸附去除三价砷的性能 Authors:Sun, Ye-Yang (1); Zhou, Chang (1); Gan, Yong-Hai (1); Wu, Bing-Dang (1); Zhang, Shu-Juan (1) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China Corresponding author:Wu, Bing-Dang(wubingdang@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5460-5471 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Although the adsorption capacity of titanium xerogel(TAX)for arsenite(As(Ⅲ))is high(254 mg•g-1), the adsorption rate is slow. Therefore, TAX was loaded onto activated carbon, sponge, and resin to fabricate a supported adsorbent, and the arsenite removal performance was evaluated. Except sponge, activated carbon and resin could successfully load TAX. The results showed that resin and activated carbon loaded TAX improved the As(Ⅲ)removal performance, and more significantly by the resin-based materials. Through wet digestion and adsorption kinetics experiments, the amount of titanium loaded was approximately 1.4% and 5% in the activated carbon-based(TAX@AC)and resin-based(TAX@resin)materials, respectively. For the initial concentration of 1.0 mg•L-1 As(Ⅲ)solution, the adsorption rate constant of TAX@D201 was 0.85 mg•(g•min)-1, which was 21 times higher than that of unloaded TAX[0.04 mg•(g•min)-1]. Columns packed with TAX@resin could effectively lower arsenite concentration for up to 560 bed volumes, which is 2.8 times greater than that of the iron-based composites with the same metal mass. Therefore, loading TAX on macroporous resin is an effective strategy and provides an effective approach for the application of TAX in arsenite-containing groundwater.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Adsorption Controlled terms:Activated carbon - Groundwater - Rate constants - Resins - Titanium - Xerogels Uncontrolled terms:Adsorption rates - Arsenite removal - As - Load - Performances evaluation - Removal performance - Resin-based materials - Sponge - Titania - Titania xerogel adsorbent Classification code:444.2 Groundwater - 542.3 Titanium and Alloys - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 815.1.1 Organic Polymers Numerical data indexing:Mass 1.00E-06kg, Mass 2.54E-04kg, Mass 4.00E-08kg, Mass 8.50E-07kg, Percentage 1.40E+00%, Percentage 5.00E+00% DOI:10.13227/j.hjkx.202103066 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065990 Title:Evolution and Potential Source Apportionment of Atmospheric Pollutants of Two Heavy Haze Episodes During the COVID-19 Lockdown in Beijing, China Title of translation:COVID-19疫情期间北京市两次重霾污染过程大气污染物演变特征及潜在源区分析 Authors:Zhao, De-Long (1, 2, 3); Tian, Ping (1, 2, 3); Zhou, Wei (1, 2, 3); Xiao, Wei (1, 2, 3); Sheng, Jiu-Jiang (1, 2, 3); Wang, Fei (1, 2, 3); Du, Yuan-Mou (1, 2, 3); Huang, Meng-Yu (1, 2, 3); He, Hui (1, 2, 3); Ding, De-Ping (1, 2, 3) Author affiliation:(1) Beijing Weather Modification Office, Beijing; 100089, China; (2) Beijing Key Laboratory of Cloud, Precipitation and Atmospheric Water Resources, Beijing; 101200, China; (3) Field Experiment Base of Cloud and Precipitation Research in North China, China Meteorological Administration, Beijing; 101200, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5109-5121 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To control the spread of the 2019 novel coronavirus(COVID-19), China imposed rigorous restrictions, which resulted in great reductions in pollutant emissions. However, two heavy haze pollution episodes still occurred in Beijing. In this study, we use the air pollutants, aerosol number concentration, and meteorological elements data in Beijing, combined with the HYSPLIT model, to calculate the potential source contribution factor(PSCF)and concentration weight trajectory(CWT), and analyze the characteristics of evolution and potential source apportionment of atmospheric pollutants during the two episodes. The COVID-19 lockdown restrictions had great impacts on the diurnal variations of PM2.5 and black carbon(BC), while small impacts on the diurnal variations of CO, NO2, SO2, and O3. The primary pollutant was PM2.5 during the two haze pollution episodes, and the haze1 episode was mainly local pollution, while haze 2 was mainly local and external transportation pollution. The spectrum of aerosol number concentration was unimodal under different processes, with the peak located at 0.3 μm. During the haze episodes, the number concentration in the size range of 0.2-0.5 μm increased 3.3-13.6 times that of the clean days. The mass concentration contributions of BCliquid to BC in different processes were 64.8%-85.1%. This mass concentration of BCliquid ranked in the order of haze 1(5.04 μg•m-3)>haze 1(3.20 μg•m-3)>clean day(before COVID-19)(2.31 μg•m-3)>clean day(COVID-19)(0.76 μg•m-3). The characteristics of PSCF and CWT distribution of PM2.5 and BC were different in different processes. The PSCF high value areas of PM2.5 on the clean day(before COVID-19)and the clean day(COVID-19)were mainly distributed in the southwest and western of Beijing, and the weight concentration exceeded 30 μg•m-3. The PSCF high value areas of PM2.5 during haze 1 and haze 2 were mainly distributed in Beijing and its surrounding areas and southwestern, when the weight concentration exceeded 90 μg•m-3. The PSCF high value areas of BC were mainly distributed in Beijing and its surrounding areas on clean days(before COVID-19), clean days(COVID-19)and haze 1, with weighted concentrations exceeding 2.4, 0.9 and, 4.5 μg•m-3, respectively. The PSCF high value areas of BC on haze 2 was distributed in the southwest of Beijing, and the weight concentration exceeded 5 μg•m-3.
© 2021, Science Press. All right reserved. Number of references:58 Main heading:Aerosols Controlled terms:Air pollution - Atmospheric movements - Carbon - Coronavirus Uncontrolled terms:Beijing - Black carbon - COVID-19 - Haze - Number concentration - PM 2.5 - Potential source apportionment - Potential source contribution factors - Potential sources - Source apportionment Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 461.6 Medicine and Pharmacology - 804 Chemical Products Generally Numerical data indexing:Mass 2.31E-09kg, Mass 3.00E-08kg, Mass 3.20E-09kg, Mass 4.50E-09kg, Mass 5.00E-09kg, Mass 5.04E-09kg, Mass 7.60E-10kg, Mass 9.00E-08kg, Percentage 6.48E+01% to 8.51E+01%, Size 2.00E-07m to 5.00E-07m, Size 3.00E-07m DOI:10.13227/j.hjkx.202104289 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065980 Title:Pollution Characteristics and Ozone Formation Potential of Ambient VOCs in Different Functional Zones of Shenyang, China Title of translation:沈阳市不同功能区挥发性有机物分布特征及臭氧生成潜势 Authors:Ku, Ying-Ying (1); Ren, Wan-Hui (2); Su, Cong-Cong (2); Yu, Xing-Na (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Shenyang Ecological and Environmental Monitoring Center of Liaoning Province, Shenyang; 110000, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5201-5209 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Ambient volatile organic compounds(VOCs)were determined by GC 5000 online gas chromatography in three functional areas of Shenyang, namely industrial, traffic, and mixed cultural and educational areas. The pollution characteristics of VOCs in these functional areas during the heating and non-heating periods were analyzed, and the ozone formation potential(OFP)was estimated by using maximum incremental reactivity(MIR). The results show that the average mass concentration of VOCs is(82.19±54.99)μg•m-3 in Shenyang, of which the concentration in industrial areas is significantly higher than that in traffic and cultural and educational mixed areas, and the heating period is higher. The traffic and mixed cultural and educational areas have bi-modal characteristics due to the morning and evening traffic, and the industrial area has multiple peaks affected by the irregular operation hours. The proportion of VOCs in traffic and mixed cultural and educational areas shows the order of alkanes>aromatic hydrocarbons>alkenes>alkynes, but the proportion of alkynes in industrial areas is higher than that of alkenes. The benzene to toluene(B/T)and ethane to acetylene(E/A)ratios reflects that traffic and mixed cultural and educational areas were affected by both vehicle exhaust emissions and fuel combustion. The industrial zone is therefore affected by complex sources, and there are more aged air masses during the heating period than non-heating period. The average OFP contribution of atmospheric VOCs in Shenyang is 232.89 μg•m-3. The contribution of alkenes is largest for all functional areas, and the aromatic component also contributes more due to the high concentration of industrial areas.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Ozone Controlled terms:Aromatic hydrocarbons - Fuels - Gas chromatography - Heating - Industrial emissions - Olefins - Volatile organic compounds Uncontrolled terms:Ambients - Cultural areas - Educational area - Functional areas - Functional zones - Heating period - Industrial area - Ozone formation potentials - Ozone(O3) - Species composition Classification code:451.1 Air Pollution Sources - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass 2.3289E-07kg DOI:10.13227/j.hjkx.202101137 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065975 Title:Impact of Air Humidity on PM2.5 Mass Concentration and Visibility During Winter in Tianjin Title of translation:天津市冬季空气湿度对PM2.5和能见度的影响 Authors:Ding, Jing (1, 2); Tang, Ying-Xiao (1, 2); Hao, Tian-Yi (1, 2); Yao, Qing (1, 2); Cai, Zi-Ying (1, 2); Zhang, Yu-Fen (2, 3); Han, Su-Qin (1, 2) Author affiliation:(1) Tianjin Environmental Meteorological Center, Tianjin; 300074, China; (2) China Meteorological Administration-Nankai University Cooperative Laboratory for Atmospheric Environment-Health Research, Tianjin; 300074, China; (3) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China Corresponding authors:Zhang, Yu-Fen(zhafox@126.com); Zhang, Yu-Fen(zhafox@126.com); Han, Su-Qin(sq_han@126.com); Han, Su-Qin(sq_han@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5143-5151 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Air humidity is a key meteorological factor in regulating visibility changes and haze episodes. Based on multi-year historical data of PM2.5 mass concentration, visibility, relative humidity(RH), and specific humidity(q)during winter in Tianjin, the impact of air humidity on PM2.5 mass concentration and visibility was investigated. Between 2015 and 2020, the PM2.5 mass concentration showed an overall decline of 28.0%. The frequency of visibility above 10 km significantly increased between 2015 and 2018, indicating an improvement in visibility during this period. However, the visibility deteriorated again in the winter of 2019 and 2020, with a decreased frequency of visibility above 10 km. Specifically, the mean RH in January and February in 2020 of Tianjin reached 63% and 67%, respectively, which were higher than the historical 30-year average for the same period. The frequency of extremely low visibility(lower than 2 km)rebounded to a level equivalent to that during the winter of 2016. The enhanced air humidity visually obscured the reduction effect of PM2.5. For Tianjin, the external sources of water vapor are southwestern and eastern transport. Particularly, water vapor transported from eastern Bohai Bay(59%)is significantly greater than that from southwestern direction(25%). However, the eastern air mass is generally clean, hence, although the condensed water may increase the PM2.5 mass concentration in the humid air, the eastern air mass affects visibility to a greater extent. On the other hand, the haze episodes during winter frequently occurred when the southwestern wind dominated and specific humidity was greater than 2.0 g•kg-1, with a frequency of 83.6%. In a short period of time, the variation of specific humidity is less significant than RH, therefore, the relationship between specific humidity and PM2.5 mass concentration or air quality can be utilized to predict the occurrence of haze episodes and pollution during winter. When the average RH is higher than 80% or the mean specific humidity is greater than 3.0 g•kg-1, the frequency of PM2.5 mass concentration greater than 75 μg•m-3 is 78% and 80%, respectively. For the air quality forecast during winter, weather conditions with specific humidity greater than 3.0 g•kg-1 should be carefully monitored.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Visibility Controlled terms:Air quality - Water vapor - Weather forecasting Uncontrolled terms:Air humidity - Air mass - Historical data - Low visibility - Mass concentration - Meteorological factors - PM 2.5 - Specific humidity - Tianjin - Water vapour Classification code:443 Meteorology - 451.2 Air Pollution Control - 741.2 Vision Numerical data indexing:Age 3.00E+01yr, Mass 2.00E-03kg, Mass 3.00E-03kg, Mass 7.50E-08kg, Percentage 2.50E+01%, Percentage 2.80E+01%, Percentage 5.90E+01%, Percentage 6.30E+01%, Percentage 6.70E+01%, Percentage 7.80E+01%, Percentage 8.00E+01%, Percentage 8.36E+01%, Size 1.00E+04m, Size 2.00E+03m DOI:10.13227/j.hjkx.202104007 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065969 Title:Disinfection By-products in Drinking Water and Their Control Strategies: A Review Title of translation:饮用水中的消毒副产物及其控制策略 Authors:Chu, Wen-Hai (1); Xiao, Rong (1); Ding, Shun-Ke (1); Zhang, Rui-Hua (1) Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5059-5074 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Disinfection by-products(DBPs)are secondary pollutants generated by the reaction of disinfectants with organic or inorganic precursors during drinking water disinfection. DBPs have received considerable global attention due to their carcinogenic, teratogenic, and mutagenic characteristics. Focusing on drinking water, this paper introduces the main classification and research history of DBPs, and then summarizes the concentration levels of common DBPs in drinking water, and DBPs regulatory compliance in global drinking water standards. Further, the control strategies for DBPs in drinking water, including source control, process control, DBPs removal and integrated control are introduced together with the advantages and disadvantages. Finally, a summary and review of the current level and future trends of DBPs research in China are presented with the proposed control strategies. On the one hand, when evaluating the control effect of a process or technology, the DBPs concentration and comprehensive toxicity should be considered; on the other hand, in order to realize the efficient control of DBPs in drinking water, the focus should be on the integrated methods coupling different DBPs control methods.
© 2021, Science Press. All right reserved. Number of references:154 Main heading:Potable water Controlled terms:Disinfection - Integrated control - Process control - Regulatory compliance - Water pollution Uncontrolled terms:Carcinogenics - Concentration levels - Control strategies - Disinfection by-product - Disinfection byproducts - Drinking water disinfection - Inorganic precursor - Occurrence level - Organic precursor - Research history Classification code:444 Water Resources - 453 Water Pollution - 731.1 Control Systems DOI:10.13227/j.hjkx.202103034 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066058 Title:Output Characteristics of Nitrogen and Phosphorus from Non-Point Source Pollution of Typical Land Use in A Micro-Watershed in Hilly Red Soil Region Title of translation:红壤丘陵区小流域典型土地利用的面源氮磷输出特征 Authors:Fang, Zhi-Da (1, 2); Su, Jing-Jun (1, 2); Zhao, Hong-Tao (1, 2); Hu, Lian (1); Li, Xu-Yong (1, 2) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding authors:Zhao, Hong-Tao(htzhao@rcees.ac.cn); Zhao, Hong-Tao(htzhao@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5394-5404 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Scientific identification of runoff output characteristics of different land use patterns is the premise of controlling non-point source pollution in watersheds. The hydrology and output process of non-point source pollutants of forest, planting, and construction land with different rainfall characteristics were observed using a micro-watershed in a low mountain and hilly region of Southern China. The results showed that land use affected the hydrological characteristics and water quality processes of runoff. The characteristics of runoff generation time and cumulative rainfall under typical rainfall conditions were as follows: construction land(9 min, 2.0 mm), planting land(35 min, 11.4 mm), and forest land(108 min, 24 mm). There were significant differences in the three land use types in the pollution output process characteristics, such as pollutant concentration of total suspended matter(TSS), total nitrogen(TN)and phosphorus(TP), their components, N/P ratio change, and output intensity. Under typical rainfall, different land use types had similar pollution output stages, the mass concentrations of TSS, TN, and TP in the initial runoff were high, and then gradually stabilized. In addition, the first 30 min of the flow generation process contributed to the TSS, TN, and TP loads within the 23%-43% range. At the annual scale, there were significant differences between the contribution rate of each land use type to TN and TP load and ratio per unit area; the highest contribution to total pollution load was planting land(57% and 45%), while the highest in pollution load per unit area was construction land(9.50-12.50). The results also showed that the distribution of key non-point source areas had different spatial and temporal dynamics, which was comprehensively determined by the land use types in catchment units, the characteristics of annual rainfall, among other factors. With the increase in rainfall, the main contribution non-point source pollution in the micro-watershed changed from construction land to planting land. Targeted ecological interception strategies should be implemented based on the distribution characteristics of key source areas and characteristics of underlying surface runoff production process.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Land use Controlled terms:Catchments - Forestry - Nitrogen - Phosphorus - Rain - Runoff - Water pollution - Water quality - Watersheds Uncontrolled terms:Construction land - Land use type - Micro-watershed - Nitrogen and phosphorus - Nitrogen and phosphorus output - Nonpoint-source pollution (NPS) - Plantings - Runoff process - Total nitrogen - Total suspended matter Classification code:403 Urban and Regional Planning and Development - 442.1 Flood Control - 443.3 Precipitation - 444.1 Surface Water - 445.2 Water Analysis - 453 Water Pollution - 804 Chemical Products Generally - 821.0 Woodlands and Forestry Numerical data indexing:Percentage 2.30E+01% to 4.30E+01%, Percentage 4.50E+01%, Percentage 5.70E+01%, Size 1.14E-02m, Size 2.00E-03m, Size 2.40E-02m, Time 1.80E+03s, Time 2.10E+03s, Time 5.40E+02s, Time 6.48E+03s DOI:10.13227/j.hjkx.202103163 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110403624 Title:Characteristics and Drivers of Dissolved Carbon Dioxide and Methane Concentrations in the Nantiaoxi River System in the Upper Reaches of the Taihu Lake Basin During Summer-Autumn Title of translation:太湖流域上游南苕溪水系夏秋季水体溶存二氧化碳和甲烷浓度特征及影响因素 Authors:Liang, Jia-Hui (1, 2); Tian, Lin-Lin (1, 3); Zhou, Zhong-Yu (1, 3); Zhang, Hai-Kuo (1, 2); Zhang, Fang-Fang (2); He, Sheng-Jia (2); Cai, Yan-Jiang (1, 2) Author affiliation:(1) State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou; 311300, China; (2) College of Environment and Resources, Zhejiang A&F University, Hangzhou; 311300, China; (3) College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou; 311300, China Corresponding author:Cai, Yan-Jiang(yjcai@zafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2826-2838 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Inland waters are vital sinks for active carbon (C) and potential sources of greenhouse gas emissions. In this study, the characteristics of dissolved carbon dioxide (CO2) and methane (CH4) concentrations in the Nantiaoxi River system in the upper reaches of the Taihu Lake basin were observed between Jul. 2019 and Nov. 2019 (summer and autumn) using headspace equilibration-gas chromatography. Simultaneously, physical and chemical parameters were also determined to understand the factors influencing dissolved CO2 and CH4 concentrations. The results showed that the mean dissolved CO2 concentrations and saturation levels in water were (505.47±16.99) μg•L-1 and (256.31±8.32)%, respectively, and the corresponding values for CH4 were (1.88±0.09) μg•L-1 and (5 218.74±264.30)%, respectively. The saturation levels of dissolved CO2 and CH4 at all observation points were greater than 100%, indicating that the Nantiaoxi River system is a potential source of CO2 and CH4. The highest mean dissolved CO2 concentrations in water were found in agricultural areas followed by residential and forest areas, and there were significant differences among the three land-use types. The mean dissolved CH4 concentrations in the water in residential areas were significantly higher than those in agricultural area forest areas. The dissolved CO2 concentrations, saturation levels of CO2, dissolved CH4 concentrations, and saturation levels of CH4 in water were all negatively correlated with oxidation reduction potential (ORP) (P<0.01) and positively correlated with electrical conductivity (EC) (P<0.01). The discrepancies in chlorophyll (Chl-a), nitrate (NO3--N), total nitrogen (TN), and EC were the main reasons for differences in dissolved CO2 concentrations among the different land use types. Phytoplankton growth could be promoted by the higher input of nitrogen pollutants into rivers in agricultural and residential areas, and respiration could be also enhanced, resulting in higher dissolved CO2 concentrations. The higher concentrations of dissolved organic carbon (DOC) and ammonium nitrogen (NH4+-N) in the water, and the water temperature in residential areas, were probably the main causes of the higher dissolved CH4 concentrations. Rainfall also had some influence on dissolved CO2 and CH4 concentrations in the water associated with the different land use types. Specifically, higher concentrations of nitrogen pollutants and the enhancement of DOC were the main drivers of high dissolved CO2 concentrations in agricultural areas as well as the higher dissolved CH4 concentrations in residential areas following rainfall events.
© 2021, Science Press. All right reserved. Number of references:72 Main heading:River pollution Controlled terms:Agricultural robots - Carbon dioxide - Dissolution - Forestry - Gas chromatography - Gas emissions - Greenhouse gases - Housing - Lake pollution - Lakes - Land use - Methane - Nitrogen - Organic carbon - Rain - Redox reactions - Rivers Uncontrolled terms:Different land use types - Dissolved carbon dioxide - Dissolved organic carbon - Electrical conductivity - Methane concentrations - Oxidation reduction potential - Physical and chemical parameters - Phytoplankton growth Classification code:403 Urban and Regional Planning and Development - 403.1 Urban Planning and Development - 443.3 Precipitation - 451.1 Air Pollution Sources - 453 Water Pollution - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 1.00e+02% DOI:10.13227/j.hjkx.202009095 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405262 Title:Spatial Distribution Characteristics, Pollution, and Ecological Risk Assessment of Soil Heavy Metals Around Mercury Mining Areas Title of translation:汞矿区周边土壤重金属空间分布特征, 污染与生态风险评价 Authors:Wang, Rui (1, 2); Deng, Hai (1, 2); Jia, Zhong-Min (1, 2); Wang, Jia-Bin (1, 2); Yu, Fei (1, 2); Zeng, Qin-Qin (3) Author affiliation:(1) Southeast Sichuan Geological Group, Chongqing Bureau of Geology and Minerals Exploration, Chongqing; 400038, China; (2) Chongqing Key Laboratory of Land Quality Geological Survey, Chongqing; 400038, China; (3) Chengdu Geological Survey Center of China Geological Survey, Chengdu; 610081, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3018-3027 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To ascertain the impact of mercury mining on the surrounding soil environment and human health, 42 surface soil composite samples were collected around a mercury mining area in Youyang County, Chongqing, and the heavy metals (Cd, Hg, Pb, As, Cr, Cu, Zn, and Ni) contents and pH of the soil, the spatial distribution of heavy metals, pollution degree, and ecological risk were studied. The results show that the surface soil layer in the study area is significantly enriched in heavy metals. According to the soil environmental quality risk control standard for soil contamination of agricultural land (GB15618-2018), soil Cd, Hg, Pb, As, and Zn showed different degrees of excess. A certain degree of pollution and ecological risk was also identified in the studied soil. Moderate-to-severe pollution and strong ecological risk areas are distributed around the mining sites, indicating the impact of mining activities on the soil environment. The content of Cr, Cu, and Ni in the soil may be affected by weathering and soil formation from the parent rock; Hg, Pb, and Zn content may be affected by human activities such as mineral mining; and Cd and As content may be affected by both geological processes and human activities. Heavy metals pose less of a health risk for adults but have a greater probability of causing health risks for children. Soil As is the main contributor to human health risks, and the oral intake of the eight heavy metals has the highest contribution rate. The mining of mercury is the main cause of soil pollution and ecological risk in the study area.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Soil pollution Controlled terms:Agricultural robots - Health - Health risks - Heavy metals - Minerals - Risk assessment - Soil surveys - Soils - Spatial distribution - Weathering Uncontrolled terms:Degree of pollutions - Distribution characteristics - Ecological risk assessment - Environmental quality - Geological process - Human health risks - Soil contamination - Surface soil layers Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics DOI:10.13227/j.hjkx.202010140 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804559 Title:Effect of Oxidation Strengthening on In-situ Phosphorus Immobilization of Calcium Hydroxide Title of translation:氧化强化对氢氧化钙原位固磷效果的影响 Authors:Xu, Chu-Tian (1); Li, Da-Peng (1); Yue, Wei (1); Wu, Yu-Han (1); Sun, Pei-Rong (1); Tang, Yao-Yu (1); Huang, Yong (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Li, Da-Peng(ustsldp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:723-731 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this research, calcium hydroxide [Ca(OH)2] and hydrogen peroxide (H2O2) were injected into the bottom mud in the form of plum blossom scatterers to investigate the effect on the control of endogenous phosphorus. The results showed that Ca(OH)2 used singly effectively immobilized in the order of 90% of endogenous phosphorus approximately 20 mm below the sediment-water interface (SWI); however, at the same time, the anaerobic environment was enhanced, resulting in the transformation of stable phosphorus to easily released phosphorus and the accumulation of potential active phosphorus. Nevertheless, the addition of H2O2 greatly reduced the amount of potential active phosphorus in deep sediments after adding Ca(OH)2. The vertical diffusion depth of Ca(OH)2 in the sediments was significantly increased, having an influence across the depth range of 0-40mm below the SWI; the improvement at depths greater than 40 mm was not notable, which was mainly attributed to an 18-fold increase of redox potential due to the addition of the oxidant. The change of phosphorus forms in the sediment also demonstrated the excellent immobilization effect of the oxidant on phosphorus. In the 0-20 mm layer, the content of readily released phosphorus decreased significantly, while compared with a control test, Ca-P increased by approximately 10%. However, at greater depths, the amount of easily released phosphorus decreased and the rate of Ca-P increase gradually slowed.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Phosphorus compounds Controlled terms:Hydrated lime - Hydrogen peroxide - Lime - Oxidants - Redox reactions - Sediments Uncontrolled terms:Anaerobic environment - Control tests - Depth range - Immobilization effects - Phosphorus form - Redox potentials - Sediment water interface - Vertical diffusion Classification code:483 Soil Mechanics and Foundations - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.00e+01%, Percentage 9.00e+01%, Size 0.00e+00m to 2.00e-02m, Size 0.00e+00m to 4.00e-02m, Size 2.00e-02m, Size 4.00e-02m DOI:10.13227/j.hjkx.202007114 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804540 Title:Establishment of a High-resolution Anthropogenic Emission Inventory and Its Evaluation Using the WRF-Chem Model for Lanzhou Title of translation:兰州市高分辨率人为源排放清单建立及在WRF-Chem中应用评估 Authors:Guo, Wen-Kai (1); G.-Y., Li; B., Chen; J.-Q., Xia; R.-X., Zhang; X., Liu; Y.-F., Zhu; Q., Chen Author affiliation:(1) Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou; 730000, China Corresponding author:Chen, Qiang(chenqqh@lzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:634-642 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:City-scale high-resolution anthropogenic emission inventories are an important tool for ambient air quality forecasting and early warning, the analysis of underlying causes, and policy making. At present, city-scale anthropogenic emissions inventories for use in air quality models are scarce for West China. By studying the literature on emission inventories, this paper establishes a city-scale anthropogenic emission inventory for Lanzhou (HEI-LZ16) as the basis for an air quality model. The weather research and forecasting with chemistry (WRF-Chem) model was used to evaluate the applicability of the emission inventory at different resolutions in Lanzhou. The results showed that the emission amounts of SO2, NOx, CO, NH3, VOCs, PM10, PM2.5, BC, and OC in Lanzhou were 25 642, 53 998, 319 003, 10 475, 35 289, 49 250, 19 822, 2 476, and 1 482 t•a-1 in 2016,respectively. Compared with the simulation scenario of multi-resolution emission inventory for China (MEIC), normalized mean error (NME) of O3 and PM2.5 under the HEI-LZ16 scenario decreased by 140.2% and 28.8%, respectively. The HEI-LZ16 inventory is more suitable for application in air pollution research in Lanzhou, which was verified by the WRF-Chem model and the observational data. The spatiotemporal distributions of PM2.5 and O3 were also analyzed using the HEI-LZ16 scenario. The ozone concentration of the maximum daily 8-h average (MDA8) in Lanzhou was low in urban areas and high in the suburbs during winter and spring, and high in the west of the urban valley and its downwind areas during summer and autumn. MDA8 in summer and autumn was influenced by easterly winds and photochemical reactions. In winter, ozone concentrations in urban areas are suppressed by NOx emissions but the concentration decreases. High PM2.5 concentrations are mainly concentrated within the Yellow River Valley. This study shows that there is a pollutant transmission channel along the western side of the Baiyin-Lanzhou Yellow River Valley, which has a greater impact on the ambient air quality in Lanzhou.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:River pollution Controlled terms:Air quality - Ammonia - Landforms - Nitrogen oxides - Ozone - Photochemical reactions - Quality control - Sulfur dioxide - Weather forecasting Uncontrolled terms:Air quality modeling - Ambient air quality - Anthropogenic emissions - Different resolutions - Emission inventories - Spatiotemporal distributions - Transmission channels - Weather research and forecasting Classification code:443 Meteorology - 451.2 Air Pollution Control - 453 Water Pollution - 481.1 Geology - 741.1 Light/Optics - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 1.40e+02%, Percentage 2.88e+01%, Time 2.88e+04s DOI:10.13227/j.hjkx.202007088 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247484 Title:Release Mechanisms of Carbon Source and Dissolved Organic Matter of Six Agricultural Wastes in the Initial Stage Title of translation:6种农业废弃物初期碳源及溶解性有机物释放机制 Authors:Ling, Yu (1); Yan, Guo-Kai (1); Wang, Hai-Yan (1); Dong, Wei-Yang (1); Wang, Huan (1); Chang, Yang (1); Li, Cong-Yu (1) Author affiliation:(1) Research Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Science, Beijing; 100012, China Corresponding author:Wang, Hai-Yan(wanghy@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2422-2431 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As carbon sources for the denitrification process, agricultural wastes have some problems, such as excess release of organic carbon; unclear release characteristics of nitrogen, phosphorus, and colorimetric substances; and unclear components, release mechanisms, and potential effects of the released dissolved organic matter (DOM) in the start-up period. To resolve those problems, rice straw, wheat straw, corn stalk, corncob, soybean stalk, and soybean hull were selected as denitrification carbon sources to investigate the release mechanisms and potential influences of the organic matter, secondary pollutants, and DOM. The results showed that the six agricultural wastes could be used as the denitrification carbon source. The carbon content in the wheat straw was the highest and the secondary pollution risk from the corncob was the lowest. For the six carbon sources, the second-order kinetic equation and Ritger-Peppas equation were followed during the 1-120 h carbon release process. The fitting results demonstrated that corncob was more suitable for use as the denitrification carbon source because of its moderate cm value and longer t1/2 value, and the release mechanisms of the six types of carbon sources were mainly controlled by the diffusion process. The NH4+-N, TN, and TP contents in the immersion water of the rice straw were higher than those of the five other agricultural wastes, and there was heavy chromaticity in the immersion water of the wheat straw and corn stalk. The amounts of nitrogen, phosphorus, and chromatic substances released from the corncob were the lowest. The leachates of the corncob and soybean hull had higher biodegradability and lower risks of secondary pollution than those of the other sources. The aromaticity and molecular weight of DOM increased as the reaction time increased, and the humification of DOM was low. Five components were identified by PARAFAC. The main component was protein-like matter, which was mainly composed of tyrosine-like and tryptophan-like substances. There was less humic acid-like matter in the immersion water. The component characteristics of DOM might have had an adverse effect on the subsequent water treatment process. These results could provide theoretical support for the impact on effluent water quality and risk assessment when the agricultural wastes are used as an additional denitrification carbon source at the start-up stage.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Organic carbon Controlled terms:Agricultural robots - Agriculture - Amino acids - Biodegradability - Biogeochemistry - Denitrification - Effluents - Integral equations - Nitrogen - Phosphorus - Pollution - Risk assessment - Straw - Water quality - Water treatment Uncontrolled terms:Component characteristics - Denitrification process - Dissolved organic matters - Potential effects - Release characteristics - Second order kinetics - Secondary pollution - Water treatment process Classification code:445.1 Water Treatment Techniques - 445.2 Water Analysis - 452.3 Industrial Wastes - 801.2 Biochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes - 914.1 Accidents and Accident Prevention - 921.2 Calculus Numerical data indexing:Time 3.60e+03s to 4.32e+05s DOI:10.13227/j.hjkx.202010177 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003353 Title:Effect of Plastic Film Mulching on Methane and Nitrous Oxide Emissions from the Ridges and Furrows of a Vegetable Field Title of translation:地膜覆盖对菜地垄沟CH4和N2O排放的影响 Authors:Xiong, Wei-Xia (1, 2); Jiang, Chang-Sheng (1, 2); Zhao, Zhong-Jing (1, 2); Zeng, Wei (1, 2); Hu, Man-Li (1, 2); Tu, Ting-Ting (1, 2); Chen, Jun-Jiang (1, 2); Hao, Qing-Ju (1, 2) Author affiliation:(1) State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, College of Resources and Environment, Southwest University, Chongqing; 400716, China; (2) Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing; 400715, China Corresponding author:Hao, Qing-Ju(haoqingju@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1559-1568 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Investigate the effects of plastic film mulching on CH4 and N2O emissions from a vegetable field, a one-year in situ field observation was conducted using a static opaque chamber in a pepper-radish cropping system at the Key Field Station for Monitoring of Eco-Environment of Purple Soil of the Ministry of Agriculture of China at Southwest University, Chongqing. Two treatments (conventional and film mulching) were used to study the influence of film mulching on CH4 and N2O emissions. The results showed that mulching significantly increased the annual average soil pH (P<0.01), annual surface and subsurface (5 cm) temperature (P<0.05), and soil moisture content during the radish-growing season (P<0.05). The mulching also significantly reduced CH4 emissions in the field ridges (P<0.05); the average CH4 flux from ridges during the pepper-growing season was 0.110 mg•(m2•h)-1 and 0.028 mg•(m2•h)-1, and 0.011 mg•(m2•h)-1 and -0.019 mg•(m2•h)-1 during the radish-growing season, under the conventional and film mulching treatments, respectively. However, across the entire experiment, CH4 flux from field furrows was not significantly different between the two mulching treatments (P>0.05), with mean flux values during the pepper-growing season of 0.058 mg•(m2•h)-1 and 0.057 mg•(m2•h)-1, and 0.083 mg•(m2•h)-1 and 0.092 mg•(m2•h)-1 during the radish-growing season, for conventional and plastic film mulching, respectively. Except for the conventional treatment during the pepper-growing season, CH4 emissions from ridges were significantly higher than from furrows, but for other treatments, including conventional and film mulching treatments during radish-growing season and film mulching treatment during the pepper-growing season, the CH4 emissions from furrows were all significantly higher than those from ridges. This was related to the stable anoxic environment created in furrows under high rainfall conditions in Southwest China. The N2O emission flux from the ridges during the pepper-growing season was 65.41 μg•(m2•h)-1 and 68.39 μg•(m2•h)-1 under the conventional and film mulching treatments, respectively, and the N2O emission flux during the radish-growing season was 78.43 μg•(m2•h)-1 and 66.19 μg•(m2•h)-1, respectively. The N2O flux between conventional treatment and film mulching treatment in ridges or furrows were not significantly different (P>0.05), while the N2O emissions from the ridges were significantly higher than that from the furrows. CH4 emission flux was significantly positively correlated with surface and subsurface temperature, while N2O emission flux was only significantly positively correlated with alkaline nitrogen and ammonium nitrogen content.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Plastic films Controlled terms:Agricultural robots - Agriculture - Alkalinity - Nitrogen - Nitrogen oxides - Soil moisture - Vegetables Uncontrolled terms:Ammonium nitrogen - Anoxic environment - Conventional treatments - Field observations - Nitrous oxide emissions - Plastic film mulching - Rainfall condition - Subsurface temperature Classification code:483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 817.1 Polymer Products - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products Numerical data indexing:Size 5.00e-02m DOI:10.13227/j.hjkx.202007225 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804524 Title:Characteristics of Dissolved Organic Carbon Loss in Purple Soil Sloping Fields with Different Fertilization Treatments Title of translation:不同施肥条件下紫色土旱坡地可溶性有机碳流失特征 Authors:Xiong, Zi-Yi (1); Zheng, Jie-Bing (2); Wang, Dan (2); Wang, Fu-Hua (1); Wang, Ying-Yan (1); Wang, Zi-Fang (1); Gao, Ming (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Institute of Geology and Mineral Resources, Chongqing; 401120, China Corresponding author:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:967-976 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The characteristics of dissolved organic carbon loss with different fertilization treatments were examined to derive the best nutrient management method for sloping farmland in the Three Gorges Reservoir area where maintaining the soil carbon balance and reducing environmental pollution caused by carbon loss is crucial. Experimental runoff plots were set up at the Experimental Station for Soil and Water Conservation and Environmental Research in the Three Gorges Reservoir Region, Chinese Academy of Sciences, involving the following five treatments: No fertilization (CK), conventional fertilization (conventional), optimum fertilization (optimum), biochar combined with 85% optimum fertilizer (biochar), and straw combined with 85% optimum fertilizer (straw). The effects of the five treatments on runoff flux, sediment yield, and soil organic carbon flux were monitored and evaluated. Results show that: ①Subsurface flow accounted for 52.84%-92.23% of the runoff (both surface and subsurface flow) and the loss flux of dissolved organic carbon (DOC) in the subsurface accounted for 43.64%-87.35% of the total loss flux. Thus, in this sloping farmland, subsurface flow was the main pathway of runoff and dominated dissolved organic carbon transport. ②Compared with the optimum treatment, straw treatment reduced the surface runoff flux, sediment yield, surface loss flux of DOC, and loss flux of organic carbon in the sediment by 30.39%, 39.41%, 28.71%, and 23.97%, respectively, but increased the subsurface runoff flux and loss flux of DOC. Compared with the optimum treatment, the biochar treatment significantly increased the surface and subsurface runoff flux, sediment yield, loss flux of DOC in the surface and subsurface, and the loss flux of organic carbon in the sediment. ③The loss flux of DOC accounted for 99.31%-99.94% of the loss flux of soil organic carbon, and DOC was the major species of organic carbon in the organic carbon loss in this type of sloping farmland. The loss flux of DOC under the different fertilization treatments was ranked biochar>optimum>straw>conventional>CK. ④Compared to the optimum treatment, the straw treatment and biochar treatment increased the soil organic carbon (SOC) content by 95.79% and 32.16%, respectively. Based on these results, straw combined with 85% of optimum fertilizer is the best nutrient management method for this sloping farmland as it can reduce surface runoff flux, sediment yield, and the loss flux of soil organic carbon while increasing the soil organic carbon content.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Organic carbon Controlled terms:Dissolution - Farms - Fertilizers - Nutrients - Reservoir management - Reservoirs (water) - Runoff - Sediments - Soil conservation - Soils - Stream flow - Water conservation Uncontrolled terms:Chinese Academy of Sciences - Dissolved organic carbon - Environmental researches - Soil and water conservation - Soil organic carbon content - Surface and subsurface flow - Three gorges reservoir area - Three Gorges Reservoir region Classification code:407.2 Waterways - 441.2 Reservoirs - 444 Water Resources - 444.1 Surface Water - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 512.1.2 Petroleum Deposits : Development Operations - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 2.40e+01%, Percentage 2.87e+01%, Percentage 3.04e+01%, Percentage 3.22e+01%, Percentage 3.94e+01%, Percentage 4.36e+01% to 8.73e+01%, Percentage 5.28e+01% to 9.22e+01%, Percentage 8.50e+01%, Percentage 9.58e+01%, Percentage 9.93e+01% to 9.99e+01% DOI:10.13227/j.hjkx.202007139 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003466 Title:Health Benefit Assessment of PM2.5 Pollution Control in Beijing Title of translation:北京市控制PM2.5污染的健康效益评估 Authors:Du, Pei (1); Wang, Jian-Zhou (1) Author affiliation:(1) School of Statistics, Dongbei University of Finance and Economics, Dalian; 116025, China Corresponding author:Wang, Jian-Zhou(wangjz@dufe.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1255-1267 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The assessment of residents' health and economic benefits of PM2.5 pollution control is of great significance for the promotion of regional environmental air pollution monitoring, warning, and prevention. This paper utilized Poisson regression relative risk models and environmental value assessment methods to assess the health risks and economic benefits of PM2.5 pollution control in the 16 municipal districts of Beijing from 2016 to 2019 after reaching the secondary standard limit of 35 μg•m-3. The results showed that PM2.5 concentrations, various health effects, economic benefits, and per capita economic health benefits in all 16 districts showed a downward trend. Specifically, PM2.5 concentrations dropped from 73 μg•m-3 in 2016 to 42 μg•m-3 in 2019 at an average annual rate of 16.75%. The total number of healthy beneficiaries from PM2.5 pollution control dropped from 439 985 cases in 2016 (95% confidence interval (CI): 183 987, 653 476) to 77 288 cases in 2019 (95% confidence interval (CI): 30 483, 120 905) at an average annual rate of approximately 42.67%. The share of health economic benefits in GDP dropped from 3.16% (95% confidence interval (CI): 1.10%, 4.73%) to 0.55% (95% confidence interval (CI): 0.18%, 0.88%), and the per capita health economic benefit dropped from 3 727.61 yuan (95% confidence interval (CI): 1 303.24, 5 592.18) to 906.58 yuan (95% confidence interval (CI): 295.14, 1 438.27). Due to differences in PM2.5 concentrations, population number and density, and economic values of unit health endpoints, the results of the health economic benefit analysis, proportion of GDP, and per capita benefits varied between the 16 districts. Among these, Fengtai, Tongzhou, and Daxing show much higher values than others, indicating relatively high health and economic benefits from pollution control.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Economic and social effects Controlled terms:Air pollution control - Economics - Health - Health risks - Risk assessment Uncontrolled terms:Confidence interval - Environmental air pollution - Environmental values - PM2.5 concentration - Poisson regression - Population numbers - Relative risk models - Secondary standard Classification code:451.2 Air Pollution Control - 461.6 Medicine and Pharmacology - 461.7 Health Care - 914.1 Accidents and Accident Prevention - 971 Social Sciences Numerical data indexing:Percentage 1.10e+00%, Percentage 1.68e+01%, Percentage 1.80e-01%, Percentage 4.27e+01%, Percentage 4.73e+00%, Percentage 8.80e-01%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202005225 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126233 Title:Establishment and Application of Performance Evaluation and Obstacle Diagnosis Model for Regional Water Ecological Civilization Construction Title of translation:区域水生态文明建设绩效评价及障碍诊断模型的建立与应用 Authors:Wan, Bing-Tong (1); Bao, Xue-Ying (1); Zhao, Jian-Chang (1); Li, Ai-Chun (1) Author affiliation:(1) School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China Corresponding author:Bao, Xue-Ying(813257032@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2089-2100 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A scientific performance evaluation of the regional water ecological civilization construction and clarifying the obstacle factor are key points to improve the performance of regional water ecological civilization construction theory. This study analyzes the coupling relationship between humans and regional water ecology by applying the thinking logic of "driving force-pressure-state-influence-response-management." The regional water ecological civilization construction performance evaluation index system based on the DPSIRM model was established. Combining the unascertained measurement model and obstacle diagnosis model, the water ecological civilization construction performance of Shizuishan City during the past 10 years was empirically evaluated, and the obstacle factors affecting local construction performance were diagnosed and analyzed. The analytical results reveal the following points: First, the performance of the water ecological civilization construction in Shizuishan City gradually increased annually and revealed three development stages: the site visit and slow improvement (2010-2014), intermediate but fast improvement (2015-2017) and good and fast improvement (2018-2019). Second, each subsystem performance index trend varied, but generally, the fluctuations rose. Third, from 2010 to 2014, the average obstacle degree of the subsystem state, subsystem response, and subsystem pressure reached 58.81%, which became the main obstacles restricting the performance of the local water ecological civilization construction. From 2015 to 2017, the average pressure barrier degree reached 21.73%, which was the most significant obstacle to the construction performance. From 2018 to 2019, the average pressure barrier degree remained the largest obstacle by reaching 24.49%. Lastly, the index barrier of the obstacle degree among the top five factors are primarily distributed in the pressure subsystem. A comprehensive frequency ranking of the obstacles, the irrigation water use coefficient, and the pressure of the water consumption per ten thousand yuan of value-added by industry as a representative subsystem are the key directions to future construction. In this paper, the concepts and methods of the research can provide a theoretical reference for the performance evaluation of regional water ecological civilization construction and its obstacle factor diagnosis analysis.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Ecology Controlled terms:Irrigation - Water supply Uncontrolled terms:Analytical results - Construction performance - Coupling relationships - Irrigation water use - Response management - Scientific performance - Subsystem performance - Unascertained measurements Classification code:446.1 Water Supply Systems - 454.3 Ecology and Ecosystems - 821.3 Agricultural Methods Numerical data indexing:Age 1.00e+01yr, Percentage 2.17e+01%, Percentage 2.45e+01%, Percentage 5.88e+01% DOI:10.13227/j.hjkx.202008026 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003352 Title:Effects of Superparamagnetic Nanomaterials on Soil Microorganisms and Enzymes in Cadmium-Contaminated Paddy Fields Title of translation:超顺磁性纳米材料对镉污染稻田土壤微生物和酶的影响 Authors:Fang, Dan-Dan (1, 2); Zhang, Li-Zhi (1, 2); Wang, Qiang (1, 2) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400716, China; (2) Key Laboratory of Agricultural Resources and Environment of Chongqing, Chongqing; 400716, China Corresponding author:Wang, Qiang(781216966@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1523-1534 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Using Fe3O4 and hydroxyapatite as raw materials, superparamagnetic nanometer-sized Fe3O4-phosphate functionalized materials (MFH) were prepared. Soil was subsequently magnetically repaired by adding MFH to cadmium-contaminated paddy field soil. Two kinds of rice with high (Yuzhenxiang) and low (Xiangwanxian-13) cadmium enrichment were selected for conduct pot experiments to study the effect of MFH magnetic separation on soil microorganisms and enzymes, and explore the possibility of application in the remediation of cadmium-polluted farmland. The results showed that MFH application improved the soil remediation effect, with significantly reduced total Cd (38.9%) and available Cd (27.3%) contents. In addition, the Cd content of the two kinds of rice grain was significantly reduced. After MFH magnetic separation, soil microbial community diversity and richness were decreased during the jointing, heading, and maturing stages of the two rice varieties. Treatment of cultivated Yuzhenxiang rice with high concentrations of Cd significantly increased the abundance of dominant Firmicute bacteria in the rice field during the jointing and heading stages. With the use of MFH in the magnetic separation, urease, catalase, and soil peroxidase activity were improved during the jointing, heading, and maturing stages of the two rice soils. The POD enzyme activity in the soil planted with Yuzhenxiang was slightly higher than that planted with Xiangwanxian-13, while urease activity showed the opposite trend.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Soil pollution Controlled terms:Cadmium - Enzyme activity - Hydroxyapatite - Iron oxides - Magnetic separation - Magnetite - Microorganisms - Soil conservation - Soils - Superparamagnetism Uncontrolled terms:Functionalized materials - Paddy field soils - Peroxidase activities - Soil micro-organisms - Soil microbial community - Soil remediation - Superparamagnetics - Urease activity Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 701.2 Magnetism: Basic Concepts and Phenomena - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.73e+01%, Percentage 3.89e+01% DOI:10.13227/j.hjkx.202007303 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126224 Title:Effects of Different Organic Materials on Absorption and Translocation of Arsenic and Cadmium in Rice Title of translation:不同有机物料对水稻根表铁膜及砷镉吸收转运的影响 Authors:Li, Kai-Ye (1, 2); Zhao, Ting-Ting (1, 2); Chen, Jia (1, 2); Zhao, Xiu-Lan (1, 2) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China Corresponding author:Zhao, Xiu-Lan(zxl@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2047-2055 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A pot experiment was carried out to study the impacts of five organic materials (rape straw, broad bean stalk, peat, pig manure compost, and biochar) on the availability of arsenic (As) and cadmium (Cd) in soil, the amount of iron plaque on the root surface, as well as the uptake and translocation of As and Cd in rice grown in an As/Cd co-contaminated yellow paddy soil. The results indicated that the application of organic materials significantly increased the contents of the soil organic matter and the yield of rice. The application of broad bean stalk, peat, pig manure compost, and biochar remarkably increased the soil pH, while the application of rape straw exerted no significant influence. The addition of organic matter reduced the available Cd content by 34.77%-82.69%. However, the effects of organic materials on the availability of As varied with the organic materials. The soil-available As content was significantly increased by the application of pig manure compost and biochar, while it was significantly decreased by adding rape straw and peat. The application of organic materials increased As and Cd contents in the Fe plaques on rice root surface by 28.49%-94.86% and 17.73%-151.03%, respectively. It also reduced the As and Cd contents in brown rice by 27.04%-82.51% and 15.87%-79.45%, respectively. The largest decrease was observed in the biochar treatment. The application of organic materials also remarkably reduced the translocation efficiency of Cd from the root-stem-leaf-grain and that of As from the stem to grain. The correlation analysis revealed that the soil pH, available Cd, and Cd content in the Fe plaques are the major factors influencing the accumulation of Cd in the rice grain. Furthermore, the soil pH, soil organic matter, and As content in the Fe plaques are the major factors influencing the accumulation of As in the rice grain. Therefore, it has been concluded that organic materials could influence the uptake and translocation of As and Cd in rice through changing the soil pH, organic matter content, and As and Cd contents in the Fe plaques.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Soil pollution Controlled terms:Arsenic - Biogeochemistry - Cadmium - Composting - Fertilizers - Grain (agricultural product) - Manures - Organic compounds - Peat - Soils - Vegetables Uncontrolled terms:Cadmiums (Cd) - Correlation analysis - Major factors - Organic materials - Organic matter content - Pig manure compost - Pot experiment - Soil organic matters Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 524 Solid Fuels - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.4 Agricultural Products - 821.5 Agricultural Wastes Numerical data indexing:Percentage 1.59e+01% to 7.95e+01%, Percentage 1.77e+01% to 1.51e+02%, Percentage 2.70e+01% to 8.25e+01%, Percentage 2.85e+01% to 9.49e+01%, Percentage 3.48e+01% to 8.27e+01% DOI:10.13227/j.hjkx.202007307 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126256 Title:Combined Remediation of Eutrophic Water by PhoslockⓇ and Aerobic Denitrifying Bacteria Title of translation:锁磷剂联合好氧反硝化菌修复富营养化水体 Authors:Li, Bing-Tang (1); Zhou, Zhi-Qin (1); Naidu, Ravi (2); Hu, Zhi-Quan (1); Guo, Da-Bin (1); Chen, Jia-Xin (1) Author affiliation:(1) School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) Cooperative Research Center for Contamination Assessment and Remediation, University of South Australia Mawson Lakes, Australia Corresponding author:Hu, Zhi-Quan(huzq@hust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1861-1869 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Nitrogen and phosphorus are the leading causes of water eutrophication, and it is challenging to remove nitrogen and phosphorus effectively through a single water remediation method. In this study, an aerobic denitrifying bacterium (AD-19) isolated from eutrophic water was used to construct an immobilized biofilm and combined with PhoslockⓇ to remove nitrogen and phosphorus from the water. The phosphorus control efficiency of PhoslockⓇ, nitrogen removal performance of the denitrifying bacteria, and combined remediation performance for the eutrophic water were studied. The results demonstrated that the removal rate of PO43--P in the simulated eutrophic water reached 95% with a dosing ratio of 80 (mass ratio of PhoslockⓇ to PO43--P), and phosphorus release from sediment was effectively inhibited at the same time. Strain AD-19, which was identified as Pseudomonas sp. Using the 16S rDNA method, had a good heterotrophic nitrification and aerobic denitrification ability, and more than 97% of the nitrogen was removed when NH4+-N or NO3--N was used as the nitrogen source. The feasibility of the combined remediation of the eutrophic water was demonstrated using a lake simulation device. Furthermore, this technique was used to restore a eutrophic pond in a park in Wuhan city. After 16 days of treatment, the water quality indices for nitrogen and phosphorus were improved from worse than Grade Ⅴ to Grade Ⅲ (GB 3838-2002, Ministry of Environmental Protection of China, 2002) and remained stable for more than 270 days, indicating that PhoslockⓇ combined with the immobilized biofilm could quickly and effectively restore eutrophic water as well as maintain the water quality for long periods.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Water treatment Controlled terms:Aerobic bacteria - Biofilms - Denitrification - Eutrophication - Nitrogen removal - Phosphorus - Pollution - Restoration - Water quality Uncontrolled terms:Aerobic denitrification - Denitrifying bacteria - Heterotrophic nitrification - Nitrogen and phosphorus - Phosphorus release - Removal performance - Water eutrophication - Water quality indexes Classification code:445.1 Water Treatment Techniques - 445.2 Water Analysis - 461 Bioengineering and Biology - 462.5 Biomaterials (including synthetics) - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Age 4.38e-02yr, Age 7.40e-01yr, Percentage 9.50e+01%, Percentage 9.70e+01% DOI:10.13227/j.hjkx.202008232 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247666 Title:Sources and Fate of Nitrate in Groundwater in a Typical Karst Basin: Insights from Carbon, Nitrogen, and Oxygen Isotopes Title of translation:碳氮氧同位素解析典型岩溶流域地下水中硝酸盐来源与归趋 Authors:Ren, Kun (1, 2); Pan, Xiao-Dong (1); Liang, Jia-Peng (1); Peng, Cong (1); Zeng, Jie (1) Author affiliation:(1) Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Key Laboratory of Karst Dynamics, Ministry of Natural Resources & Guangxi, Guilin; 541004, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2268-2275 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Multiple isotopes (C, N, and O) and hydrochemical data were used to trace the sources and fate of nitrate in ground and surface waters of the Babu subterranean stream watershed in Guizhou Province. The origin of nitrate in the water samples was also quantitatively analyzed by the SIAR model. Approximately 38% of the groundwater samples were not drinkable because the nitrate exceeded the drinking water standard, thereby indicating that the groundwater was seriously polluted by nitrate. The ranges of δ15N-NO3, δ18O-NO3, and δ18O-H2O in groundwater were 2.30‰-30.33‰ (mean of 9.68‰), 2.65‰-13.73‰ (mean of 6.64‰), and -8.83‰-7.37‰ (mean of -8.18‰), respectively. Based on the stable isotopic compositions (δ15N-NO3, δ18O-NO3, and δ18O-H2O), nitrification was the dominant process in the basin. The nitric acid produced by nitrification promoted the dissolution of carbonate rocks, thereby leading to a significantly negative correlation (P<0.001) between the carbon isotope of dissolved inorganic carbon (δ13CDIC) and δ15N-NO3 and indicating that δ13CDIC, combined with δ15N-NO3, is effective in exploring the fate of nitrate in karst groundwater. The nitrate in the ground and surface waters mainly originated from soil N, manure and sewage, and ammonium nitrogen fertilizer. The results of the SIAR model showed that the contributions of soil N, manure and sewage, and ammonium nitrogen fertilizer were 36.19%, 33.71%, and 30.10% in groundwater, respectively, and 39.15%, 36.08%, and 24.77% in surface water, respectively. Therefore, it would be more effective to reduce the nitrate recharge flux in groundwater by simultaneously removing nitrate and ammonium nitrogen during wastewater treatment and by adopting scientific fertilization technology in agricultural areas.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Nitrogen removal Controlled terms:Agricultural robots - Carbon - Data streams - Groundwater - Groundwater pollution - Isotopes - Manures - Nitrates - Nitric acid - Nitrification - Nitrogen fertilizers - Oxygen - Potable water - Sewage - Surface waters - Wastewater treatment Uncontrolled terms:Agricultural areas - Ammonium nitrogen - Dissolved inorganic carbon - Drinking water standards - Hydrochemical data - Karst groundwater - Negative correlation - Stable isotopic compositions Classification code:444 Water Resources - 452.1 Sewage - 452.4 Industrial Wastes Treatment and Disposal - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.5 Agricultural Wastes Numerical data indexing:Percentage 2.48e+01%, Percentage 3.01e+01%, Percentage 3.37e+01%, Percentage 3.61e+01%, Percentage 3.62e+01%, Percentage 3.80e+01%, Percentage 3.91e+01% DOI:10.13227/j.hjkx.202010028 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804536 Title:Time-Determination and Contribution Analysis of Transport, Retention, and Offshore Backflow to Long-Term Sand-Dust Coupling Title of translation:输送,滞留叠加海上回流的长时间沙尘天气影响判断及贡献分析 Authors:Zhang, Zhe (1, 2); Qiao, Li-Ping (2); Zhou, Min (2); Huang, Dan-Dan (2); An, Jing-Yu (2); Guo, Hui-Qin (1, 3); Wang, Hong-Li (2); Huang, Cheng (2); Dong, Zhao-Xin (4, 5); Wang, Shu-Xiao (4, 5) Author affiliation:(1) School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang; 330063, China; (2) State Environmental Protection Key Laboratory of the Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang; 330063, China; (4) State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China; (5) State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing; 100084, China Corresponding authors:Qiao, Li-Ping(qiaolp@saes.sh.cn); Guo, Hui-Qin(guohuiqin@nchu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:584-594 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Continuous on-line observation of particulate matter and PM2.5 chemical composition was conducted from October 15th to November 7th 2019 in East China. During the observation period, a wide range of dust-related processes took place. According to supplementary urban air quality assessment affected by dust (hereafter referred to as supplementary provisions), the observations were divided into four stages including pre-dust event, dust Ⅰ, dust Ⅱ, and post-dust event. The dust Ⅰ stage represented the processes of transportation and retention, while the dust Ⅱ stage represented processes of backflow from the sea and scavenging. The start time of the studied dust event was October 29th 08:00-09:00 based on the supplementary provisions, dust tracers, and air quality models; however, disagreements existed between these data sources with respect to the finishing time. The supplementary provisions could not effectively distinguish backflow dust from sea, and results from different dust tracers were variable. The WRF-CMAQ model simulated dust variation trends well but overestimated short-term suspended dust and backflow dust. PM10, PM2.5, and trace element concentrations were much higher during dust events than during non-dust periods, with highest daily concentrations of (234.8±125.5), (76.8±22.5), and (17.54±10.5) μg•m-3, respectively, which occurred on October 29th. During the dust event, concentration of crustal elements were remarkably high in PM2.5. At the same time, secondary ions (SO42-, NO3-, and NH4+) contributed less to PM2.5 mass concentrations. Four major crustal elements (Al, Si, Ca, and Fe) accounted for 23.5% and 13.7% of the mass concentration of PM2.5 and secondary ions accounted for 24.3% and 41.9% during dust Ⅰ and dust Ⅱ stages, respectively. Based on PMF source apportionment, Ca abundance, PM2.5/PM10 in dust sources, and the reconstruction of crustal material, dust particulates accounted for 43.4%-50.0% of PM2.5 and backflow dust accounted for 19.2%-24.7% of PM2.5..
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Dust Controlled terms:Air quality - Offshore oil well production - Particles (particulate matter) - Secondary emission - Trace elements - Tracers Uncontrolled terms:Air quality models - Chemical compositions - Contribution analysis - On-line observations - Particulate Matter - Source apportionment - Trace element concentrations - Urban air quality assessment Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 511.1 Oil Field Production Operations - 951 Materials Science Numerical data indexing:Percentage 1.37e+01%, Percentage 1.92e+01% to 2.47e+01%, Percentage 2.35e+01%, Percentage 2.43e+01%, Percentage 4.19e+01%, Percentage 4.34e+01% to 5.00e+01% DOI:10.13227/j.hjkx.202006120 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126248 Title:Effects of Combined Application of Biogas Slurry and Straw on the Migration and Fractions of Soil Heavy Metals in Rice-wheat Rotation System in Coastal Reclamation Areas Title of translation:沼液秸秆联用对滨海围垦田土壤重金属迁移及形态变化的影响 Authors:Wang, Wei (1); Zhou, Jun-Nan (1); Tang, Yi-Fan (1, 2); Shen, Jian-Hua (3); Han, Jian-Gang (1, 2) Author affiliation:(1) College of Biology and Environment, Nanjing Forestry University, Nanjing; 210037, China; (2) Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province, Nanjing Forestry University, Nanjing; 210037, China; (3) COFCO Meat (Jiangsu) Co., Ltd., Dongtai; 224200, China Corresponding author:Han, Jian-Gang(hanjiangang76@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1979-1988 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to reveal the impact of the application of biogas slurry instead of chemical nitrogen fertilizer on the environmental risk of heavy metals in the soil by returning straw to the field, four treatments, without biogas slurry and without straw applications (CK), biogas slurry application without straw (B), straw application without biogas slurry (S), and biogas slurry combined with straw applications (BS), were applied in a typical coastal reclaimed farmland (rice-wheat rotation) in Jiangsu province. The migration and morphological characteristics of Cu, Zn, Cd, and Pb in different soil layers were observed, and the potential environmental risks were estimated. The results showed that: ① The total amounts of Zn and Pb in the surface soils (0-20 cm) in the rice and wheat fields under the BS treatment decreased significantly (P<0.05). The four heavy metals in the paddy soils migrated 6%-11% from the surface to the middle and lower layers (20-60 cm), and Cu, Cd, and Pb in the wheat soils migrate down from the surface by 25% to 33%. This indicated that the combined use of biogas slurry and straw accelerates the vertical downward movement of heavy metals in the surface soil. ② Under the BS treatment, the contents of the weak acid extraction of Cu in the surface soil of the paddy field decreased by 8.8%, and the residual state of Zn, Cd, and Pb decreased by 7.0% to 14.2%. This revealed that Cu was passivated, but Zn, Cd, and Pb tended to be activated. In comparison, the reduction in Cu residues in wheat field surface soil was 2.8 times that of the weak acid extraction, indicating that Cu was activated. Furthermore, the residue state of Cd increased, the weak acid extraction state of Pb decreased, and Cd and Pb were passivated. ③ The ecological risk assessment of heavy metals showed that there is no ecological risk in the soils under the BS treatment, and the risk indices were significantly lower than those of the B and S treatments (P<0.05). Therefore, the combined use of biogas slurry and straw helps to significantly reduce the risk of heavy metal pollution in the soils in the coastal reclamation areas.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Soil pollution Controlled terms:Biogas - Cadmium - Copper - Extraction - Lead - Nitrogen fertilizers - Reclamation - Risk assessment - Risk perception - Soils Uncontrolled terms:Ecological risk assessment - Ecological risks - Environmental risks - Heavy metal pollution - Morphological characteristic - Reclamation areas - Rice-wheat rotations - Soil heavy metals Classification code:483.1 Soils and Soil Mechanics - 522 Gas Fuels - 544.1 Copper - 546.1 Lead and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations - 804 Chemical Products Generally - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.50e+01% to 3.30e+01%, Percentage 6.00e+00% to 1.10e+01%, Percentage 7.00e+00% to 1.42e+01%, Percentage 8.80e+00%, Size 0.00e+00m to 2.00e-01m, Size 2.00e-01m to 6.00e-01m DOI:10.13227/j.hjkx.202007207 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779866 Title:High-resolution Estimation of Spatio-temporal Variation in PM2.5 Concentrations in the Beijing-Tianjin-Hebei Region Title of translation:京津冀地区高分辨率PM2.5浓度时空变化模拟与分析 Authors:Yang, Xiao-Hui (1, 2); Song, Chun-Jie (1, 2); Fan, Li-Hang (1, 2); Zhang, Ling-Yun (1, 2); Wei, Qiang (1, 2); Li, Fu-Xing (1, 3); Wang, Li-Yan (1, 2); Wang, Wei (1, 2) Author affiliation:(1) College of Resources and Environmental Science, Hebei Normal University, Shijiazhuang; 050024, China; (2) Hebei Laboratory of Environmental Evolution and Ecological Construction, Shijiazhuang; 050024, China; (3) Hebei Technology Innovation Center for Remote Sensing Identification of Environmental Change, Shijiazhuang; 050024, China Corresponding author:Wang, Wei(wangwei@hebtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4083-4094 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study developed a two-stage statistical model (linear mixed effect (LME) model+geographical weight regression (GWR) model) to determine the spatio-temporal variation of PM2.5 concentrations in the Beijing-Tianjin-Hebei (BTH) region with full-coverage, high resolution, and high accuracy. The model employs multi-angle implementation of atmospheric correction aerosol optical depth (MAIAC AOD) data, with a 1 km spatial resolution, as the main predictor and meteorological data/land-use data as the auxiliary predictors. To determine the characteristics of heavy PM2.5 pollution in the BTH region, unique predictors such as AOD2 were also introduced into the two-stage model. The two-stage model was used to estimate the daily PM2.5 concentrations with a 1 km resolution. After being cross-validated against ground observations, the R2 of PM2.5 was found to be 0.94, with a slope value of 0.95 and RMSPE value of 13.14 μg•m-3. Compared to previous studies such as LME, the two-stage model has much higher accuracy, suitable for estimating PM2.5 concentrations. The PM2.5 concentration in the BTH region ranged from 0 to 89.89 μg•m-3 in 2017, with a mean value of 44.96 μg•m-3. The spatio-temporal variability of PM2.5 over the BTH region was significant, exhibiting high values over the southwestern plain, moderate values over the northeastern plain, and low values over the mountainous plateau. In terms of seasonal variation, PM2.5 concentrations were high in winter, low in summer, and moderate in spring and autumn. The estimated PM2.5 concentrations, with high spatio-temporal resolution, are useful for exposure assessments in epidemiological studies and identifying the spatio-temporal variation of pollution sources at a fine spatial scale. The results show that the locations of vital pollution sources over the severely polluted south-central Hebei piedmont plain may have changed since the implementation of the Air Pollution Prevention and Control Action Plan. This study could provide a scientific basis for the prevention and control of air pollution in the BHT region.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Air pollution control Controlled terms:Air pollution - Meteorology Uncontrolled terms:Air pollution prevention - Beijing-tianjin-hebei regions - High resolution estimation - Multi-angle implementation of atmospheric corrections - Prevention and controls - Spatio-temporal resolution - Spatio-temporal variation - Spatiotemporal variability Classification code:451 Air Pollution - 451.2 Air Pollution Control Numerical data indexing:Size 1.00e+03m DOI:10.13227/j.hjkx.202012197 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688854 Title:Characteristics and Source Apportionment of Ambient VOCs in Spring in Liuzhou Title of translation:柳州市春季大气挥发性有机物污染特征及源解析 Authors:Liu, Qi (1, 2); Lu, Xing-Lin (3); Zeng, Peng (1); Yu, Shi (1) Author affiliation:(1) Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Guangxi Zhuang Autonomous Region Ecological Environmental Monitoring Centre of Liuzhou, Liuzhou; 545001, China; (3) Guangxi Zhuang Autonomous Region Ecological Environmental Monitoring Centre, Nanning; 530028, China Corresponding author:Yu, Shi(yushi@karst.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:65-74 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The objective was to investigate the characteristics and sources of ambient volatile organic compounds (VOCs) in the karst region in southwestern China. We monitored atmospheric VOCs in Liuzhou by the GC955 VOCs Online Monitoring System and analyzed the pollution characteristics, ozone formation potential (OFP), aerosol formation potential (AFP), and the positive matrix factorization (PMF) model in March 2019. The results show that ① 50 kinds of VOC components were detected during the supervised period, with an average daily concentration of 25.52×10-9 mol•mol-1, which was composed of alkanes (56.08%), alkenes (19.63%), alkynes (14.25%), and aromatics (10.04%), respectively. ② The concentration of VOCs was lower during the day and higher at night, with the highest value at 23:00. The VOC concentration was low in daytime and high at night. The peak value of VOCs with regard to diurnal variation was correlated with the time of morning and the evening traffic peak and may be influenced by various factors. ③ The contribution of alkenes, aromatics, and alkanes to OFP was 44.30%, 33.03%, and 19.96%, respectively. This indicates that the control of aromatic and olefin should prioritize alkanes. In addition, Liuzhou city is in the VOC sensitive area of O3 generation, and the reduction of VOCs had a controlling effect on O3 generation. ④ The contribution of aromatic hydrocarbons to AFP was up to 95.27%. Therefore, the improvement and control of the processes in motor vehicle exhaust emissions, solvent use, and the automobile industry and the chemical industry could effectively suppress ozone and haze pollution. ⑤ The emission sources of VOCs in spring were mainly industrial emission sources (28.34%), motor vehicle sources (25.47%), combustion sources (24.37%), solvent sources (13.28%), and plant emission sources (8.54%), respectively. This indicates that the control of industrial emission sources, motor vehicle sources, and combustion sources is the main way to control VOC pollution in Liuzhou City. Meanwhile, the olefin and aromatic hydrocarbons emitted by these emission sources should be mainly considered.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:Air pollution Controlled terms:Aromatic hydrocarbons - Aromatization - Chemical industry - Combustion - Factorization - Industrial emissions - Mineral oils - Olefins - Ozone - Paraffins - Pollution control - Springs (components) - Vehicles - Volatile organic compounds Uncontrolled terms:Aerosol formation - Combustion sources - Diurnal variation - Emission sources - On-line monitoring system - Ozone formation potentials - Positive matrix factorization models - Source apportionment Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 513.3 Petroleum Products - 601.2 Machine Components - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 805 Chemical Engineering, General - 921 Mathematics Numerical data indexing:Percentage 1.00e+01%, Percentage 1.33e+01%, Percentage 1.42e+01%, Percentage 1.96e+01%, Percentage 2.00e+01%, Percentage 2.44e+01%, Percentage 2.55e+01%, Percentage 2.83e+01%, Percentage 3.30e+01%, Percentage 4.43e+01%, Percentage 5.61e+01%, Percentage 8.54e+00%, Percentage 9.53e+01% DOI:10.13227/j.hjkx.202004006 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126242 Title:Pollution Characteristics and Risk Assessment of Organophosphate Esters in Rivers and Water Body Around Taihu Lake Title of translation:环太湖河流及湖体中有机磷酸酯的污染特征和风险评估 Authors:Zhang, Wen-Ping (1, 2); Zhang, Zhen-Fei (1); Guo, Chang-Sheng (1, 2); Lü, Jia-Pei (1, 2); Deng, Yang-Hui (1); Zhang, Heng (1, 2); Xu, Jian (1, 2) Author affiliation:(1) Center for Environmental Health Risk Assessment and Research, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Xu, Jian(xujian@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1801-1810 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the pollution characteristics, potential sources, and ecological and health risk of organophosphate eaters (OPEs) in the surface water of Taihu Lake, water samples from 18 surrounding rivers were collected, as well as 11 water samples from Taihu Lake. The concentrations of 13 OPEs in the water were determined using UPLC-MS/MS, and the spatial distribution of the OPEs in surface water of Taihu Lake basin was further analyzed. The results indicate that, in addition to tripropyl phosphate (TPrP), 2-ethylhexyl diphenyl phosphate (EHDPP), and tricresyl phosphate (TCrP), ten OPEs were detected in all the water samples, the total concentration (∑OPEs) ranged from 152.5 ng•L-1 to 2 524 ng•L-1, and the concentration median value was 519.2 ng•L-1. Tri(chloropropyl) phosphate (TCPP) and tri(2-chloroethyl) phosphate (TCEP) were the dominant OPEs, with the concentration ranges of 73.7-1 753.9 ng•L-1 (medium value: 204.6 ng•L-1) and 43.9-313.5 ng•L-1 (medium value: 131.3 ng•L-1), respectively. The ∑OPEs decreased from the northwest region to the southeast, which corresponds to the economic and industrial development. The results of the source identification reveal that the wastewater discharge from electronics and textile enterprises, construction materials, and vehicular and marine traffic emissions may be the principal sources of the OPEs in Taihu Lake. The ecological risk assessment results indicate that only TCPP, tri(dichloropropyl) phosphate (TDCP), and triphenyl phosphate (TPhP) in some sites had a low risk. The health risk assessment reveals that there were no risks based on water intake, but the long-term risk of OPEs to the aquatic ecosystem and surrounding residents still need attention.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Risk assessment Controlled terms:Aquatic ecosystems - Health risks - Lake pollution - Lakes - River pollution Uncontrolled terms:Concentration ranges - Ecological risk assessment - Industrial development - Organophosphate esters - Source identification - Tricresyl phosphates - Triphenyl phosphate - Wastewater discharge Classification code:453 Water Pollution - 454.3 Ecology and Ecosystems - 461.7 Health Care - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.31e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 1.53e-07kg/m3 to 2.52e-06kg/m3, Mass_Density 2.05e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 4.39e-08kg/m3 to 3.13e-07kg/m3, Mass_Density 5.19e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 7.54e-07kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202008266 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239922 Title:Heavy Metal Accumulation Effect and Safe Planting Zoning of Soil and Rice in Tongren Title of translation:铜仁土壤-水稻重金属积累效应与安全种植区划 Authors:Zhu, Liang-Liang (1); Wu, Yong (1); Zhou, Lang (1); Tang, Le-Bin (1); Song, Bo (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Collaborative Innovation Center for Water Pollution Control and Water Safety Guarantee in Karst Area, Guilin; 541004, China Corresponding authors:Song, Bo(songbo@glut.edu.cn); Song, Bo(songbo@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5988-5996 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to understand the accumulation, migration, and transformation of heavy metals in soil and rice in Tongren, Guizhou Province, a total of 230 groups of paddy soil and corresponding rice samples were collected, and the physical and chemical properties of heavy metals and soil were tested. The rice samples were evaluated using the single-factor index method, and the safe planting zoning method was proposed in combination with soil environmental quality and food contaminant limits. The results showed that: ① the average values of ω(As), ω(Cd), ω(Cu), ω(Hg), ω(Ni), and ω(Zn) in paddy soil were 12.94, 0.343, 30.53, 3.869, 30.32, and 110.0 mg•kg-1, respectively, when the pH was between 4.4 and 7.9. Among them, As, Cd, Hg, and Zn exceeded the standards of 11.7%, 10.9%, 53.0%, and 3.04% compared with the screening values in "Soil Pollution Risk Control Standards for Agricultural Land of Environmental Quality". ② The characterization values of ω(As), ω(Cd), ω(Cu), ω(Hg), ω(Ni), and ω(Zn) in rice were 0.056, 0.017, 1.445, 0.010, 0.215, and 17.59 mg•kg-1; compared with the national food safety standard (GB 2762-2017), the contents of As, Cd, and Hg in rice samples exceeded the standard by 15.7%, 3.04%, and 19.1%. As exceeded the standard point mainly distributed in Songtao County, and Hg was mainly distributed in Bijiang and Wanshan District. ③ The order of enrichment coefficient of rice was Zn>Cd>Cu>Hg>As=Ni, and the absorption and enrichment ability of rice for Zn was the strongest. ④ Most areas in the study area belong to the priority protection category. The safe utilization category is concentrated in the east of Tongren, whereas the strictly controlled category is scattered within Bijiang District, Wanshan District, and Jiangkou County. The study showed that there was heavy metal pollution in the soil in some areas of Tongren City, and the safe planting of rice also had certain risks.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Soils Controlled terms:Chemical contamination - Food safety - Mercury (metal) - Pollution control - Quality control - Soil pollution Uncontrolled terms:Accumulation effects - Environmental quality - Heavy metal accumulation - Heavy metals in soil - Paddy soils - Plantings - Regionalisation - Rice samples - Safe planting - Tongren Classification code:461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 822.3 Food Products - 913.3 Quality Assurance and Control Numerical data indexing:Mass 1.10E-04kg, Mass 1.759E-05kg, Percentage 1.09E+01%, Percentage 1.17E+01%, Percentage 1.57E+01%, Percentage 1.91E+01%, Percentage 3.04E+00%, Percentage 5.30E+01% DOI:10.13227/j.hjkx.202104291 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945462 Title:Orographic Influences on the Spatial Distribution of PM2.5 on the Fen-Wei Plain Title of translation:汾渭平原PM2.5空间分布的地形效应 Authors:Huang, Xiao-Gang (1, 2, 3); Zhao, Jing-Bo (2, 3); Sun, Cong-Jian (1); Tang, Hui-Ling (1); Liang, Xu-Qi (1) Author affiliation:(1) College of Geographical Sciences, Shanxi Normal University, Linfen; 041004, China; (2) Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China; (3) School of Geography and Tourism, Shaanxi Normal University, Xi'an; 710119, China Corresponding authors:Zhao, Jing-Bo(zhaojb@snnu.edu.cn); Zhao, Jing-Bo(zhaojb@snnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4582-4592 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Topography not only has an effect on the spatial distribution of pollutants by restricting populations and industrial activities, but also affects the formation, transmission, accumulation, diffusion, and sedimentation of PM2.5. Topography is, therefore, an essential variable for understanding the spatial distribution of PM2.5, especially in basin areas. Based on gridded data and both natural and human indexes, this paper examines orographic effects on the distribution of PM2.5 on the Fen-Wei Plain based on the change point method, regression, the geographical detector method, and bivariate spatial autocorrelation. The results indicate that: ① The relief amplitude of the plain is generally lower in its central part than at its edge, which is similar to the attitudinal distribution in this region; ② The distribution of PM2.5 is negatively related to relief amplitude, with high concentrations in central area and lower concentrations at the edge; ③ Based on the geographical detector analysis, PM2.5 patterns in this region are shaped by human factors including population, gross domestic product(GDP), and energy consumption, as well as natural factors including meteorological conditions and vegetation; and ④ Topography has a significant effect on both human and natural factors; an increase of relief amplitude is associated with a decrease in population, GDP, and energy consumption based on power function. Accordingly, temperature goes down linearly; precipitation, relative moisture, and wind speed increase linearly; and the vegetation index increases based on a logarithmic function.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Topography Controlled terms:Energy utilization - Spatial distribution - Vegetation - Wetlands - Wind Uncontrolled terms:Concentration of PM2.5 - Domestic energy - Energy-consumption - Fen-wei plain - Gross domestic products - Natural factors - Orographic influences - PM 2.5 - Product consumption - Relief amplitude Classification code:405.3 Surveying - 443.1 Atmospheric Properties - 525.3 Energy Utilization - 902.1 Engineering Graphics - 921 Mathematics - 951 Materials Science DOI:10.13227/j.hjkx.202102024 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066043 Title:Pollution Characteristics and Risk Assessment of Polycyclic Aromatic Hydrocarbons in a Suburban Farmland Soil Title of translation:城郊农田土壤多环芳烃污染特征及风险评价 Authors:Zhang, Xiu-Xiu (1); Lu, Xiao-Li (1); Wei, Yu-Chen (1); Zhu, Chang-Da (1); Pan, Jian-Jun (1) Author affiliation:(1) College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China Corresponding author:Pan, Jian-Jun(jpan@njau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5510-5518 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to assess the pollution of polycyclic aromatic hydrocarbons(PAHs)in a suburban farmland soil, 29 sampling sites were collected around Nanjing according to the grid method, and the contents of 15 different PAHs were determined. Acenaphthene(Ace)was not detected in any of the samples. The total content of PAHs in farmland soil ranged from 24.49 to 750.04 μg•kg-1, with an average of 226.64 μg•kg-1. The spatial distribution of high-ring PAHs, the main PAHs in the farmland soil, was similar to that of total PAHs. There was no significant correlation between PAHs and soil organic matter(SOM), pH, cation exchange capacity(CEC), and total nitrogen(TN), whereas bulk density and low ring PAHs were significantly correlated. The results of source apportionment show that the main source of PAHs in the farmland soil is a mixture of combustion and petroleum. The contamination severity index(CSI)index shows that the PAHs does not pose an ecological risk. The results of the health risk assessment show that there is no potential carcinogenic risk to children or adults, and the main sequence of exposure is skin contact>ingestion>inhalation.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Risk assessment Controlled terms:Aromatization - Farms - Health risks - Mineral oils - Polycyclic aromatic hydrocarbons - Soil pollution - Soils Uncontrolled terms:Acenaphthene - Contamination severity index index - Farmland soils - Grid methods - Nanjing - Risks assessments - Sampling site - Severity index - Suburban - Total content Classification code:461.7 Health Care - 483.1 Soils and Soil Mechanics - 513.3 Petroleum Products - 802.2 Chemical Reactions - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass 2.2664E-07kg, Mass 2.449E-08kg to 7.5004E-07kg DOI:10.13227/j.hjkx.202103161 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945546 Title:Geochemical Characteristics and Driving Factors of NO3-Type Groundwater in the Rapidly Urbanizing Pearl River Delta Title of translation:快速城镇化进程中珠江三角洲硝酸型地下水赋存特征及驱动因素 Authors:Lü, Xiao-Li (1, 2); Liu, Jing-Tao (1); Han, Zhan-Tao (3); Zhu, Liang (1); Zhang, Yu-Xi (1) Author affiliation:(1) Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang; 050061, China; (2) Hebei Key Laboratory of Groundwater Remediation, Shijiazhuang; 050061, China; (3) Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing; 100012, China Corresponding author:Liu, Jing-Tao(728881944@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4761-4771 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In response to rapid economic development, nitrate pollution of groundwater is becoming a serious issue in many parts of China. Urbanization and industrialization are the main drivers of NO3-type groundwater expansion. Focusing on the Pearl River Delta, the occurrence and driving factors of shallow nitrate groundwater are discussed. Overall, groundwater nitrate concentrations are generally high in this region. Of 1538 groundwater samples, 5.7% had nitrate concentrations higher than the groundwater quality standard(88.6 mg•L-1)and 18.5% were classified as NO3-type waters, which are mainly distributed in the hilly and piedmont areas. Guangzhou, Dongguan, Foshan, Zhuhai and other areas show high total dissolved solid(TDS)-concentration NO3-type waters, which are affected by urbanization and industrialization. In comparison, low-TDS NO3-type waters are distributed in the hilly and valley areas. In the Xijiang and Dongjiang plains, the TDS concentrations on groundwater increased significantly due to inputs of industrial wastewater and saline seawater. The NO3- concentration in the groundwater in this area exceeded the class III water standard but did not change the hydrochemical type classification. However, industrialization has led to the frequent appearance of SO4-type water in this area. The NO3-type water occurs in acidic or weakly acidic environments, typically characterized by low TDS and total hardness concentrations, and high Cl-, SO42-, and K+ concentrations. The formation of NO3-type water is mainly affected by domestic sewage, industrial wastewater, agricultural nitrogen fertilizer, septic tank outflows, and landfill leachate leakage. Generally, the pollution loads of high-TDS NO3-type waters are higher than low-TDS NO3-type waters. The delineation of NO3-type waters, especially the low-TDS type, is helpful for identifying groundwaters posing greater risks for human activities, and those with low nitrate concentrations but potential pollution risk, which is of great significance in the prevention and control of groundwater pollution.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Groundwater Controlled terms:Groundwater pollution - Hydrochemistry - Landforms - Nitrates - Nitrogen fertilizers - Pollution control - River pollution - Sewage - Water quality Uncontrolled terms:Driving factors - Geochemical characteristic - Industrial wastewaters - Industrialisation - Nitrate concentration - NO3-type groundwater - Pearl River delta - Solids concentrations - Total dissolved solids - Urbanization Classification code:444.2 Groundwater - 445.2 Water Analysis - 452.1 Sewage - 453 Water Pollution - 453.1 Water Pollution Sources - 481.1 Geology - 481.2 Geochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals Numerical data indexing:Mass 8.86E-05kg, Percentage 1.85E+01%, Percentage 5.70E+00% DOI:10.13227/j.hjkx.202102126 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239873 Title:Spatial Distribution Characteristics and Source Analysis of Soil Heavy Metals at Typical Smelting Industry Sites Title of translation:典型冶炼行业场地土壤重金属空间分布特征及来源解析 Authors:Li, Qiang (1); Cao, Ying (1); He, Lian-Sheng (1); Wang, Yao-Feng (1, 2); Gong, Cheng (1); He, Shu-Han (1) Author affiliation:(1) Environmental Analysis and Testing Laboratory, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan; 063210, China Corresponding author:He, Lian-Sheng(heliansheng08@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5930-5937 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Taking a smelter in Shaoguan as a representative site of a typical industrial zone for the smelting industry, the total and bioavailable concentrations of nine heavy metal elements Cd, Pb, Hg, Sb, As, Zn, Cu, Cr, and Ni, and their spatial distributions in the soil of the smelter were studied, the latter through the interpolation analysis functionality of ArcGIS 10.2. The pollution status evaluation methods included the single factor pollution index, enrichment factor, and potential ecological hazard index methods; the analysis methods of heavy metal sources included correlation analysis and principal component analysis. The results showed that the single factor index values of Cd and As were 1.50 and 2.13, indicating light pollution; the single factor index of Pb was 5.58, indicating heavy pollution. The enrichment factors of As, Hg, and Zn were 3.73, 10.4, and 22.4, indicating moderate pollution, heavy pollution, and severe pollution, respectively; the enrichment factors of Cd and Pb exceeded 40, indicating extremely heavy pollution. The bioavailable form contents of Pb and Cd comprised a relatively high ratio of the total amount, ranging from 0.57%-46.0% and 0.87%-69.2%, respectively, followed by Zn and Cu. However, the mass fractions of Hg, Sb, Ni, As, and Cr were all less than 5%. The spatial distribution of the potential ecological risk index of heavy metals in the study area showed a trend from low to high, with a decreasing trend from west to east. The index at the northern point was significantly higher than at other points, indicating potential local leakage. The spatial distribution of Hg and Sb was different from that of other elements, being higher in the central area and lower in the eastern and western areas. The correlation analysis and principal component analysis results showed that the correlations between Cu, Zn, As, Cd, and Pb were significant, and the main source was inputs from industrial production activities. There was a significant positive correlation between Hg and Sb, but there was no correlation between these elements and other elements. The main source of Ni was probably natural input.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Spatial distribution Controlled terms:Correlation methods - Heavy metals - Lead smelting - Metal analysis - Pollution - Principal component analysis Uncontrolled terms:Bioavailable - Bioavailable form content - Correlation analysis - Distribution characteristics - Enrichment factors - Heavy metal concentration - Principal-component analysis - Smelting industry - Smelting site - Source analysis Classification code:405.3 Surveying - 531 Metallurgy and Metallography - 533.2 Metal Refining - 546.1 Lead and Alloys - 902.1 Engineering Graphics - 921 Mathematics - 922.2 Mathematical Statistics Numerical data indexing:Percentage 5.00E+00%, Percentage 5.70E-01% to 4.60E+01%, Percentage 8.70E-01% to 6.92E+01% DOI:10.13227/j.hjkx.202104313 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239894 Title:Pollution Characteristics and Reactivity of Volatile Organic Compounds in Shenyang Title of translation:沈阳市挥发性有机物污染特征及反应活性 Authors:Du, Han-Bing (1); Wang, Nan (2); Ren, Wan-Hui (2); Su, Cong-Cong (2); Hu, Jian-Lin (3); Yu, Xing-Na (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Shenyang Ecological and Environmental Monitoring Center of Liaoning Province, Shenyang; 110013, China; (3) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5656-5662 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The atmospheric volatile organic compounds (VOCs) in Shenyang were observed in 2019, and the concentration characteristics and reactivity of 53 species were studied. The results showed that the average concentration of VOCs was 65.33 μg•m-3, and the proportions of alkanes, olefins, and aromatics were 62.44%, 16.52%, and 19.32%, respectively. The top ten species of VOCs were primarily C3-C5 alkanes, olefins, and some aromatics, accounting for 64.13% of the total VOCs. The concentrations of alkanes, alkenes, and aromatics in Shenyang showed a bimodal diurnal variation trend, with the peak values at 06:00-08:00 and 19:00-20:00 and the lowest values at 14:00-15:00. The highest (136.44 μg•m-3) and the lowest (35.61 μg•m-3) ρ(VOCs) occurred in December and May, respectively. The concentrations of VOCs showed an obvious seasonal variation: winter>autumn>summer>spring. In addition, alkanes, olefins, and aromatics showed an increasing trend with the seasons. Through the value of toluene/benzene (T/B), it was found that VOCs in Shenyang mainly come from traffic and combustion sources in spring, vehicle exhaust and solvent volatilization in summer, and biomass combustion and coal combustion in autumn and winter. It was found that combustion sources were the key to controlling ozone pollution in Shenyang, and propylene, ethylene, and 1-hexene are the most reactive species in atmospheric VOCs in Shenyang based on the analysis of reaction activity.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Volatile organic compounds Controlled terms:Aromatization - Atmospheric chemistry - Coal combustion - Ethylene - Gas chromatography - Organic solvents - Ozone - Paraffins Uncontrolled terms:Average concentration - Combustion sources - Concentration characteristic - Diurnal variation - Loss rates - Ozone formation potentials - Peak values - Seasonal variation - Total volatile organic compounds - •OH loss rate Classification code:443.1 Atmospheric Properties - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 801.1 Chemistry, General - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass 1.3644E-07kg, Mass 3.561E-08kg, Mass 6.533E-08kg, Percentage 1.652E+01%, Percentage 1.932E+01%, Percentage 6.244E+01%, Percentage 6.413E+01% DOI:10.13227/j.hjkx.202103184 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945517 Title:Spatial Hydrochemical Characteristics and Controlling Factors of Surface Water in the Yancheng Area Title of translation:盐城地区地表水化学空间特征及控制因素分析 Authors:Wang, Jian (1); Zhang, Hua-Bing (1); Xu, Jun-Li (1); Peng, Jun (2) Author affiliation:(1) North Jiangsu Research Institute of Agricultural and Rural Modernization, Yancheng Teachers University, Yancheng; 224007, China; (2) School of Geographic Information and Tourism, Chuzhou University, Chuzhou; 239000, China Corresponding author:Peng, Jun(junpengdl@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4772-4780 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Surface water resources are crucial to economic development in China's eastern coastal areas. Under the influence of intense human activities, problems such as abnormal water quality and pollution are very prominent. Here, the chemical composition of surface waters and their controlling factors were analyzed in the Yancheng area. The results showed that: ① The surface water pH is low and the concentrations of total dissolved solids(TDS)are high in the study area. pH is likely controlled by the acidic organic pollutants discharged by human activities as well as acidic substances formed by anaerobic decomposition in soils. TDS data showed low values in the west and high values in the east, and low values in north and high south of the study region. ② Cation content was dominated by Na+, anions were dominated by HCO3- and Cl-, and, overall, hydrochemical composition was controlled by HCO3-(Ca+Na), although there was significant variability between the different regions. ③ Because the silt layer in the region is mainly composed of clay, subclay, and sandstone, the soluble matter in surface water is mainly derived from the decomposition of Na-feldspar in silicate debris via carbonation, supplemented by carbonation. Due to the low-lying terrain and high groundwater level in the tidal flat area, solutes are significantly affected by evaporation-driven concentration alongside evaporite weathering replenishment. ④ Although the surface waters in different regions were found to be affected by human activities to varying degrees, the impact was always strong. In particular, in areas of tidal wetland expansion, water quality is not only affected by urban sewage and agricultural irrigation but also industrial wastewater discharge.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Surface waters Controlled terms:Agricultural robots - Chemical analysis - Feldspar - Groundwater - Hydrochemistry - Irrigation - Organic pollutants - River pollution - Sewage - Sodium compounds - Water quality - Weathering - Wetlands Uncontrolled terms:Activity problem - Characteristic factors - Coastal area - Controlling factors - Economic development - Human activities - Hydrochemical characteristics - Ion provenance - Total dissolved solids - Yancheng area Classification code:444.1 Surface Water - 444.2 Groundwater - 445.2 Water Analysis - 452.1 Sewage - 453 Water Pollution - 481.2 Geochemistry - 482.2 Minerals - 731.5 Robotics - 804.1 Organic Compounds - 821.1 Agricultural Machinery and Equipment - 821.3 Agricultural Methods DOI:10.13227/j.hjkx.202102129 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065966 Title:Spatial Distribution and Pollution Assessment of Dissolved Heavy Metals in Chaohu Lake Basin During the Wet Season Title of translation:巢湖流域丰水期可溶态重金属空间分布及污染评价 Authors:He, Miao (1); Liu, Gui-Jian (1); Wu, Lei (1, 2); Qi, Cui-Cui (1) Author affiliation:(1) School of Earth and Space Sciences, University of Science and Technology of China, Hefei; 230026, China; (2) Anhui Research Academy of Environmental Sciences, Hefei; 230022, China Corresponding author:Liu, Gui-Jian(lgj@ustc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5346-5354 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The spatial distribution characteristics of the mass concentration of V, Cr, Mn, Ni, Cu, Zn, Pb, Cd, Fe, and Sb in the Chaohu Lake basin and ten surrounding rivers during the wet season were explored. The results showed that the average mass concentration of heavy metals in the western and northwestern Chaohu Lake surrounding rivers was higher than that in the central and eastern regions. The correlation analysis showed a significant positive correlation between the concentrations of Cu, Ni, Zn, Pb, and Cd, which indicated a similarity of spatial distribution among the five elements. The single-factor pollution index evaluation results classified Cr in the ten surrounding rivers as Grade I based on the Environmental Quality Standards for Surface Water. Pb was classified as Grade Ⅰ-Ⅱ; Cu and Zn as Grade Ⅰ-Ⅴ; Fe, Sb, and V were far below the standard limit; Ni slightly exceeded the standard at some sampling points of the Nanfei River; Mn slightly exceeded the standard at some points of the Shiwuli and Pai River; Cd exceeded the standard at some points of the Nanfei River. Except Mn at one point of the Tangxi River, V, Cr, Ni, Cu, Zn, Pb, and Fe were all<1, which indicated clean and pollution-free level. The integrated pollution index of the rivers surrounding the lake in the northwestern part was the highest compared to the southwestern, central, and eastern parts.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Heavy metals Controlled terms:Lake pollution - Lakes - Quality control - River pollution - Rivers - Spatial distribution Uncontrolled terms:Chaohu lakes - Classifieds - Dissolved heavy metal - Distribution characteristics - Lake basins - Mass concentration - Nanfei rivers - Pollution assessment - Surrounding river - Wet season Classification code:405.3 Surveying - 453 Water Pollution - 531 Metallurgy and Metallography - 902.1 Engineering Graphics - 913.3 Quality Assurance and Control - 921 Mathematics DOI:10.13227/j.hjkx.202103064 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003450 Title:Degradation of Dye Rhodamine B by Solar Thermally Activated Persulfate Title of translation:太阳能热活化过硫酸盐降解染料罗丹明B的效能 Authors:Ma, Meng (1); Xu, Lu (1); Jin, Xin (1); Jin, Peng-Kang (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1451-1460 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In advanced oxidation technology based on sulfate radicals, thermal activation is one of the most effective methods for persulfate (PS) activation, with broad application potential for the use of solar energy to activate PS to degrade pollutants. In this study, the efficiency and mechanism of degradation of rhodamine B by solar thermally activated PS were investigated using a solar collector reactor. The effects of solar irradiation intensity, PS concentration, substrate concentration, initial pH of the solution, and background water quality on the degradation efficiency of rhodamine B were examined. The results show that the solar thermally activated PS system has outstanding oxidation degradation performance with respect to organic pollutants. The removal rate and mineralization rate of rhodamine B reached 94% and 60%, respectively, after a 120 min reaction time. The treatment efficiency of the system was notably affected by the solar radiation intensity, with performance ranked in the order sunny days>cloudy days>rainy days. The treatment efficiency of the system could be significantly improved by increasing the concentration of PS or reducing the initial concentration of the substrate, and by adjusting the initial pH of the solution to neutral. SO4-• and •OH are the main active oxidants in the reaction system, and •OH plays a major role in the degradation process.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Rhodamine B Controlled terms:Chemical activation - Collector efficiency - Degradation - Organic pollutants - Solar energy - Solar radiation - Sulfur compounds - Water quality - Water treatment Uncontrolled terms:Advanced oxidation technology - Degradation efficiency - Initial concentration - Mechanism of degradation - Oxidation degradation - Solar radiation intensity - Substrate concentrations - Treatment efficiency Classification code:445.1 Water Treatment Techniques - 445.2 Water Analysis - 657.1 Solar Energy and Phenomena - 702.3 Solar Cells - 802.2 Chemical Reactions - 804.1 Organic Compounds Numerical data indexing:Percentage 6.00e+01%, Percentage 9.40e+01%, Time 7.20e+03s DOI:10.13227/j.hjkx.202007187 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003251 Title:Source Apportionment and Spatial Distribution Simulation of Heavy Metals in a Typical Petrochemical Industrial City Title of translation:典型石化工业城市土壤重金属源解析及空间分布模拟 Authors:Sun, Xue-Fei (1); Zhang, Li-Xia (2); Dong, Yu-Long (2); Zhu, Lin-Yu (1); Wang, Zheng (1); Lü, Jian-Shu (1) Author affiliation:(1) College of Geography and Environment, Shandong Normal University, Ji'nan; 250358, China; (2) Shandong Geological Environmental Monitoring Station, Ji'nan; 250014, China Corresponding author:Lü, Jian-Shu(lvjianshu@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1093-1104 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Identifying the quantitative source and hazardous areas of heavy metals in soils plays a pivotal role in soil pollution research, and can provide a basis for regional soil risk monitoring and environmental management. For this purpose, a total of 175 samples were collected in topsoils from Linzi, a typical petrochemical industrial city in Shandong Province. Positive matrix factorization (PMF) and factor analysis with non-negative constraints (FA-NNC) receptor models were applied to analyze the sources of the heavy metals. Based on the multivariate statistical simulation methods of min/max autocorrelation factors (MAF) and sequential Gaussian simulation (SGS), the distribution of heavy metal and potential pollution areas were determined. As, Co, Cr, and Mn were mainly affected by natural sources, their concentrations were dominated by the parent materials, and the high-value areas were distributed in the south of the study area. Hg was the most serious pollution element among the 10 heavy metals analyzed in Linzi and originated from atmosphere deposition from industrial emissions and coal combustion, and the highest values were distributed in the northeast of the study area. Cd, Cu, Ni, Pb, and Zn were dominated by natural sources and human activities. The hot-spot areas were mainly concentrated in the middle of the study area. The potentially contaminated areas of Cd and Hg were 580.80 km2and 666.60 km2, about 85.04% and 97.59% of the total area, and should require more attention. The potential pollution area of most elements was small and scattered across the study area, accounting for less than 1%.
© 2021, Science Press. All right reserved. Number of references:62 Main heading:Coal combustion Controlled terms:Environmental management - Factorization - Heavy metals - Industrial emissions - Multivariant analysis - Petrochemicals - Soil pollution - Soils Uncontrolled terms:Auto-correlation factors - Heavy metals in soil - Pollution elements - Positive Matrix Factorization - Potential pollutions - Sequential Gaussian simulation - Source apportionment - Statistical simulation Classification code:451.1 Air Pollution Sources - 454.1 Environmental Engineering, General - 483.1 Soils and Soil Mechanics - 513.3 Petroleum Products - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 531 Metallurgy and Metallography - 921 Mathematics - 922 Statistical Methods Numerical data indexing:Area 6.67e+08m2, Percentage 1.00e+00%, Percentage 8.50e+01%, Percentage 9.76e+01% DOI:10.13227/j.hjkx.202008007 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247605 Title:Characteristics of Two Pollution Episodes Before and After City Heating in Beijing from February to March of 2019 Title of translation:北京地区2019年2~3月供暖结束前后两次污染过程特征分析 Authors:Yin, Xiao-Mei (1); Pu, Wei-Wei (1); Wang, Ji-Kang (2); Liu, Xiang-Xue (1); Qiao, Lin (1) Author affiliation:(1) Environment Meteorology Forecast Center of Beijing-Tianjin-Hebei, China Meteorological Administration, Beijing; 100089, China; (2) National Meteorological Center of China Meteorological Administration, Beijing; 100081, China Corresponding author:Pu, Wei-Wei(wwpu@ium.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2110-2120 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The characteristics of meteorological conditions and pollutant concentrations were analyzed based on two pollution episodes before and after city heating in Beijing during February to March of 2019. The backward trajectory and WRF-CAMx models were used to analyze the evolution of pollutants before and after city heating, and the influences of meteorological conditions, regional transport, and secondary transformation on the episodes were discussed. There was little difference in the average ρ(PM2.5) between February 21-24 (episode 1) and March 18-20 (episode 2), with concentrations of 100.1 μg•m-3 and 97.2 μg•m-3, respectively. However, compared with that of episode 2, in episode 1 the average peak value was higher with two peak stages, the diurnal variation was clearer, and the process developed much more rapidly. Moreover, episode 1 was regional pollution, while episode 2 was more related to local pollution in Beijing. The SO2 concentrations in both episodes were not higher than 16 μg•m-3, thereby indicating the effectiveness of coal-burning treatment and other measures. In addition, two peaks occurred in the diurnal fluctuation of SO2 in episode 1, whereas only one peak occurred for episode 2. In episode 1, the CO concentration was high and the ratio of ρ(CO)/ρ(SO2) increased around February 22-23 (phase 1); moreover, the pollutant concentrations in the central and southern areas of the Beijing-Tianjin-Hebei region and those in the background sites located in the southern part of the Beijing plain were higher than those in the urban area, thereby indicating that the diffusion conditions of episode 1 were unfavorable and the first PM2.5 peak was mainly affected by regional transport. A high ratio of ρ(PM2.5)/ρ(CO) in episode 2 suggested a slightly larger proportion of secondary generation for PM2.5, whereas higher ratios of ρ(NO2)/ρ(CO), ρ(SO2)/ρ(CO), and ρ(SO42-)/ρ(PM2.5) in episode 2 and the similar SOR value to that of episode 1 demonstrated that episode 1 was more advantageous for gas phase transformation and episode 2 was more affected by the coal industry. Phased analysis of episode 1 showed that the indicators of second generation for PM2.5 in phase 2 (around February 23-24) of episode 1 and episode 2 were similar, and both were higher than that in phase 1 of episode 1, which implied that the second PM2.5 peaks of episode 1 and episode 2 were mainly related to local emissions and chemical conversion. Both WRF-CAMx with and without assimilation experiments could better reproduce the temporal variation in pollutants, and the correlation between the simulation and observations increased but with lower values after assimilation. The model performance for the PM2.5 trend simulation significantly increased with data assimilation, and the simulated lower NO2 in February and higher NO2 in March as well as the overestimated SO2 were also improved. In addition, the pollutant concentration simulation in Beijing was more sensitive to that of Hebei in episode 1, which suggested that episode 1 was more affected by regional transport. The simulation ability for the rapid growth of pollutants needs to be promoted, and the response of pollutant types to emission reduction and the feedback related to the atmospheric oxidant and aerosol properties may be important for the simulation effect, which all require further study.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Air pollution Controlled terms:Atmospheric movements - Chemical analysis - Coal industry - Emission control - Indicators (chemical) - Nitrogen oxides - Sulfur dioxide - Urban growth - Urban transportation Uncontrolled terms:Atmospheric oxidants - Backward trajectory - Beijing-tianjin-hebei regions - Chemical conversions - Diurnal fluctuations - Meteorological condition - Pollutant concentration - Secondary transformation Classification code:403.1 Urban Planning and Development - 432 Highway Transportation - 433 Railroad Transportation - 443.1 Atmospheric Properties - 451 Air Pollution - 451.2 Air Pollution Control - 503 Mines and Mining, Coal - 524 Solid Fuels - 801 Chemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202008181 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126216 Title:Adsorption and Desorption Behaviors of Antibiotics on TWP and PVC Particles Before and After Aging Title of translation:老化前后轮胎磨损微粒与聚氯乙烯微粒对抗生素的吸附-解吸行为 Authors:Fan, Xiu-Lei (1, 2); Zou, Ye-Feng (1, 2); Liu, Jia-Qiang (3); Li, Ying (1, 4); Liu, Qiang (1, 2); Hou, Jun (4, 5) Author affiliation:(1) College of Environmental Engineering, Xuzhou University of Technology, Xuzhou; 221018, China; (2) Key Laboratory of Industrial Pollution Control and Resource Reuse of Jiangsu Province, Xuzhou; 221018, China; (3) School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou; 221116, China; (4) College of Environment, Hohai University, Nanjing; 210098, China; (5) Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, Nanjing; 210098, China Corresponding author:Liu, Jia-Qiang(liujiaqiangsdjz@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1901-1912 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, microplastics (MPs), a new type of pollutant, have been widely dispersed in aquatic ecosystems. Compared with typical MPs (PVC, PP, PE, and PS), tire wear particles (TWP) exhibit significant differences in composition, additives, and characteristics. In this study, the adsorption and desorption of organic pollutants were compared between the typical MPs and TWP. With TWP and polyvinyl chloride (PVC) particles as adsorbents, oxytetracycline (OTC) and sulfamethoxazole (SMZ) as adsorbates, the adsorption and desorption of organic pollutants by TWP and PVC particles before and after aging were studied. Correctly understanding the behavior of MPs in an aquatic environment is of great significance. The results indicated that during the UV aging process, both TWP and PVC exhibited cracks, pits, and bulges on the particle surface, increased specific surface areas, increased strength of oxygen-containing functional groups, and enhanced hydrophilicity. The adsorption modes of TWP and PVC before and after aging were in two stages: surface adsorption and liquid film diffusion. TWP has a better fit for the Freundlich model, belonging to multi-layer adsorption, while PVC has a better fit for the Langmuir model, belonging to monolayer adsorption. The carrier effect of TWP on antibiotics was better than that of PVC, with the adsorption capacity of OTC on virgin TWP and PVC reaching 5.14 mg•g-1 and 1.38 mg•g-1, respectively. Additionally, the adsorption capacity of OTC on the aged TWP and PVC reached 5.82 mg•g-1 and 2.13 mg•g-1, respectively, which was better than with the virgin samples. The desorption capacity of aged TWP and PVC for antibiotics was better than the virgin materials, while the desorption rate was lower. In the same desorption solution, the desorption effect of TWP on antibiotics before and after ageing was better than that of PVC. The desorption effect of TWP and PVC on antibiotics in a simulated intestinal fluid environment was significantly better than that in an ultra-pure water environment.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Polyvinyl chlorides Controlled terms:Additives - Adsorption - Antibiotics - Aquatic ecosystems - Chlorine compounds - Desorption - Liquid films - Monolayers - Organic pollutants Uncontrolled terms:Adsorption and desorptions - Adsorption capacities - Aquatic environments - Liquid film diffusion - Monolayer adsorption - Oxygen-containing functional groups - Oxytetracyclines (OTC) - Polyvinyl chloride (PVC) Classification code:454.3 Ecology and Ecosystems - 461.6 Medicine and Pharmacology - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 815.1.1 Organic Polymers DOI:10.13227/j.hjkx.202008179 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688817 Title:Characteristics and Sources of PM2.5 Pollution in Typical Cities of the Central Plains Urban Agglomeration in Autumn and Winter Title of translation:中原城市群典型城市秋冬季大气 PM2.5污染特征及溯源 Authors:Miao, Qing-Qing (1, 2); Jiang, Nan (2); Zhang, Rui-Qin (2); Zhao, Xiao-Nan (1, 2); Qi, Jing-Wen (2) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Jiang, Nan(jiangn@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:19-29 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the characteristics of PM2.5 pollution and the potential sources of its main components in the central plain urban agglomeration in autumn and winter, PM2.5 samples were collected continually in the four typical cities of Zhengzhou, Luoyang, Anyang, and Xinxiang from October 2018 to January 2019. X-ray fluorescence spectrometry, carbon analysis methods, and ion chromatography were used to determine 18 kinds of inorganic elements, organic carbon (OC)/elemental carbon (EC), and 9 kinds of water-soluble inorganic ions. According to the daily PM2.5 concentration, three pollution levels were divided, and the comparative analysis for the spatial and temporal variation of PM2.5 and its main components, i.e., NO3-, OC, and 18 kinds of inorganic elements, were studied via the calculation of the nitrogen oxidation rate (NOR), secondary organic carbon (SOC), and enrichment factor. The emission sources and their contribution rates of PM2.5 pollution level in the four cities were calculated by a chemical mass balance (CMB) model; the potential pollution sources of PM2.5 and its main components, NO3- and OC, in the four cities were analyzed by a backward trajectory model (HYSPLIT) and potential source contribution factor method (PSCF). The results showed that the means of PM2.5 in Zhengzhou, Luoyang, Anyang, and Xinxiang were (82.1±45.5), (84.7±39.8), (96.8±46.1), and (81.1±36.6) μg•m-3, respectively, during the sampling period, and the maximum daily mean values were 3.3, 2.6, 3.0, and 2.3 times, respectively, of the Chinese national secondary standard; the main components of PM2.5 in the four cities were NO3- and SOC, and the concentration of NO3-, the ratio of NO3-/EC, and NOR all increased significantly with the rising of pollution levels, generally showing that the mean values of NO3-/EC and NOR of Zhengzhou and Luoyang were a little higher than those of Anyang and Xinxiang; the concentration of SOC, the proportion of SOC in OC, and the ratio of SOC/EC all increased with the rising of pollution levels. From the concentration and enrichment degree of inorganic elements, As was the highest in Zhengzhou; Mn and Fe were the highest in Luoyang; Zn, Ni, and Cr were the highest in Anyang; and Cu and Pb were the highest in Xinxiang. Secondary nitrate, secondary sulfate, organic matter, coal combustion, motor vehicle, dust, biomass burning, and industrial processes were the main PM2.5 pollution sources in the four cities, with the highest contribution rate of secondary nitrate in Zhengzhou (37.7%), the highest contribution rate of vehicle sources in Xinxiang (14.1%), and a relatively high contribution rate of industrial process source in Luoyang (7.0%) and Anyang (6.8%). The northwest direction of airflow contributed 51.6%, 49.2%, 49.6%, and 46.3% of the total airflow in Zhengzhou, Luoyang, Anyang, and Xinxiang, respectively. From the potential pollution area of each city, the Zhengzhou area was mainly concentrated in Henan province, the Luoyang area was mainly concentrated in the south of Henan province and Fen-wei plain, and the Anyang and Xinxiang areas were mainly concentrated in Henan province and the Beijing-Tianjin-Hebei transport belt. The pollution levels of OC in Anyang and Xinxiang were also affected by the northwest Anhui, southwest Shandong, southeast Shanxi, and north Shaanxi.
© 2021, Science Press. All right reserved. Number of references:58 Main heading:Pollution Controlled terms:Agglomeration - Coal combustion - Coal dust - Fluorescence spectroscopy - Ion chromatography - Nitrates - Organic carbon - Sulfur compounds Uncontrolled terms:Chemical mass balance model - Comparative analysis - National secondary standard - Potential source contribution factors - Secondary organic carbons (SOC) - Spatial and temporal variation - Water soluble inorganic ions - X ray fluorescence spectrometry Classification code:503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 741.3 Optical Devices and Systems - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.41e+01%, Percentage 3.77e+01%, Percentage 4.63e+01%, Percentage 4.92e+01%, Percentage 4.96e+01%, Percentage 5.16e+01%, Percentage 6.80e+00%, Percentage 7.00e+00% DOI:10.13227/j.hjkx.202005333 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003443 Title:Temporal and Spatial Evolution of Storm Runoff and Water Quality Assessment in Jinpen Reservoir Title of translation:金盆水库暴雨径流时空演变过程及水质评价 Authors:Huang, Cheng (1, 2); Huang, Ting-Lin (1, 2); Li, Yang (1, 2); Li, Nan (1, 2); Qi, Yun-Zhi (3); Si, Fan (1, 2); Hua, Feng-Yao (1, 2); Zhao, Ling-Yun (1, 2) Author affiliation:(1) Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Xi'an Water Group Heihe Jinpen Reservoir Management Company, Xi'an; 710401, China Corresponding author:Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1380-1390 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the temporal and spatial intrusion process of runoffs and the response of water quality during the flood season in the Jinpen Reservoir (JPR) in Xi'an. Continuous in-situ monitoring was carried out on the water quality indexes (WQI) from the upstream river channel to the reservoir of two runoffs in early August and mid-September 2019. The single factor WQI and comprehensive WQI were used to assess the water quality vertically. Different inflow conditions of rain storm runoffs evolved into different intrusions. The initial inflow of the two runoffs was small, the runoff experienced a full-section intrusion, bottom intrusion, and mid-intrusion process along the way; the position of mid-intrusion in reservoir changed from 545-565 m at the beginning of the runoff to 535-580 m at the end in early August, and developed from 540-575 m of mid-intrusion to 575 m below the bottom of the intrusion in mid-September. The continuous inflow weakened the thermal stratification structure and replenished the DO in the reservoir. Meanwhile, mass particulate pollutants sank into the reservoir, and vertically, the nutrients of middle and bottom parts were higher than at the surface. The single factor WQI showed that the TP and permanganate index values of underflow location increased to some extent, and both exceeded the class Ⅲ water quality standard of surface water at the end. The comprehensive WQI showed that the middle layer of runoff was moderately polluted in early August, while the bottom layer was heavily polluted due to the dual effects of anaerobic and particle deposition, and reached the peak after one week of runoff, while the bottom intrusion of below 575 m directly caused heavy pollution in the middle layer, and bottom layer was medium polluted due to the supplement of dissolved oxygen in mid-September. The discharge of the spillway tunnel and the intake of stratified water could effectively guarantee the safety of the water supply during the flood season.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Reservoirs (water) Controlled terms:Biochemical oxygen demand - Dissolved oxygen - Floods - Quality management - River pollution - Runoff - Storms - Water quality - Water supply Uncontrolled terms:In- situ monitoring - Intrusion process - Particle depositions - Temporal and spatial - Temporal and spatial evolutions - Water quality assessments - Water quality indexes - Water quality standard Classification code:441.2 Reservoirs - 442.1 Flood Control - 443.3 Precipitation - 445.2 Water Analysis - 446.1 Water Supply Systems - 453 Water Pollution - 912.2 Management Numerical data indexing:Size 5.35e+02m to 5.80e+02m, Size 5.40e+02m to 5.75e+02m, Size 5.45e+02m to 5.65e+02m, Size 5.75e+02m DOI:10.13227/j.hjkx.202007180 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126252 Title:Concentration and Particle Size Distribution Characteristics of Microbial Aerosol and Bacterial Community Structure During Spring in Lanzhou City, China Title of translation:兰州市春季微生物气溶胶浓度, 粒径及细菌群落结构分布特性 Authors:Zhao, Wei (1); Li, Jie (1); Xie, Hui-Na (1); Zhang, Li-Hong (1); Wang, Ya-E (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China Corresponding author:Li, Jie(wye@mail.lzjtu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1668-1678 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The aim of this study was to analyze the differences in the concentration, particle size, and bacterial community structure of microbial aerosols and further investigated the effects of meteorological conditions and air pollutants on microbial aerosol distribution at different periods during spring in Lanzhou. The results showed that the average aerosol concentrations of total microbes, bacteria, fungi, and actinomycetes in the air environment of Lanzhou were (2 730±376), (2 243±354), (349±38), and (138±22) CFU•m-3, respectively. The contribution rate of bacteria was 82.16%, which was significantly higher than that of fungi and actinomycetes (P<0.05). The concentrations of total microorganisms, bacteria, and actinomycetes during 08:00-09:00 were significantly higher than those sampled during 18:00-19:00, indicating that meteorological conditions and air pollutants have a remarkable influence on the concentration of microbial aerosols. Aerosol particles of bacteria and fungi were primarily distributed at the first four levels (>2.1 μm), accounting for 85.13% and 83.26%, respectively, while 73.15% of the actinomycetes aerosol particles focused largely on the latter four stages (<4.7 μm). Illumina MiSeq sequencing results indicated that there was no significant difference in the composition of the bacterial community (P>0.05) during the periods of 08:00-09:00 and 18:00-19:00. Lactococcus and Bacillus were the dominant bacteria genus. Enterococcus, Staphylococcus, Pseudomonas, Acinetobacter, Klebsiella, Erwinia, Bacillus cereus, Streptococcus agalactiae, and Clostridium perfringens were potential pathogens detected in the air environment of Lanzhou in the spring. The results could provide fundamental data for further revealing the contamination status of microbial aerosols and the potential harm of the related pathogenic bacteria to human health during the spring in Lanzhou.
© 2021, Science Press. All right reserved. Number of references:53 Main heading:Air pollution Controlled terms:Aerosols - Bacillus cereus - Bacteriology - Fungi - Particle size - Particle size analysis - Springs (components) Uncontrolled terms:Aerosol concentration - Bacterial community - Bacterial community structure - Clostridium perfringens - Meteorological condition - Microbial aerosols - Pathogenic bacterium - Streptococcus agalactiae Classification code:451 Air Pollution - 461.9 Biology - 601.2 Machine Components - 951 Materials Science Numerical data indexing:Percentage 7.32e+01%, Percentage 8.22e+01%, Percentage 8.33e+01%, Percentage 8.51e+01% DOI:10.13227/j.hjkx.202006023 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804520 Title:Comparison of Enrichment and Transport of Cadmium in the Fruit of High and Low Enrichment Pepper Varieties and Its Distribution in Subcells Title of translation:辣椒果实高中低镉积型对镉的富集,转运特性及在亚细胞分布特点比较 Authors:Shao, Xiao-Qing (1); He, Zhang-Mi (1); Xu, Wei-Hong (1) Author affiliation:(1) College of Resources and Environmental Sciences, Southwest University, Chongqing; 400715, China Corresponding author:Xu, Wei-Hong(xuwei_hong@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:952-959 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Peppers are a high Cd-enriched vegetable. On the basis of a preliminary screening experiment of 91 pepper varieties and soil culture experiments during the entire growth period of 26 varieties, a high Cd variety (X15), medium Cd variety (X39), and two low varieties (X45 and X55) were selected to study the effect of different cadmium levels (0, 5, and 10 mg•kg-1 Cd) on enrichment, transport, and accumulation as well as its subcellular distribution and chemical form. Based on the results, 5 mg•kg-1 and 10 mg•kg-1 of Cd inhibited shoot dry weights of four pepper varieties but increased the root dry weights of X15, X45, and X55 varieties. Sodium chloride-bound cadmium and acetate-bound cadmium are the main forms of cadmium in the pepper fruits. Subcellular cadmium concentrations in the roots, leaves, and fruits of pepper plants were ranked in order cytoplasm>cell wall>organelle, and in the stems the order was cell wall>cytoplasm>organelle. Cd compartmentalization plays an important role in pepper resistance to cadmium stress. Under dosages of 5 mg•kg-1 Cd and 10 mg•kg-1 Cd, Cd concentrations in stems and leaves were ranked in order X39>X15>X55>X45, with fruit Cd concentrations ranked in order X15>X39>X55>X45. The Cd concentration was lowest in the roots of X15 whereas this variety has the highest concentrations in its fruit. The Cd concentrations in the roots, stems, and leaves of X39 were the highest among the four varieties whereas the concentration in the fruit was lower than in the X15 variety. The concentration of Cd in pepper fruits depends on the Cd transport capacity redistribution ability to the shoots.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Cadmium compounds Controlled terms:Cell proliferation - Cells - Cytology - Fruits - Plants (botany) - Pollution - Sodium chloride Uncontrolled terms:Cadmium stress - Cd concentrations - Chemical forms - Low enrichment - Root dry weight - Screening experiments - Subcellular distribution - Transport capacity Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 821.4 Agricultural Products DOI:10.13227/j.hjkx.202007003 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126228 Title:Potential Ecological Risk Assessment and Source Analysis of Heavy Metals in Soil-crop System in Xiong'an New District Title of translation:雄安新区农田土壤-农作物系统重金属潜在生态风险评估及其源解析 Authors:Zhou, Ya-Long (1, 2, 3); Yang, Zhi-Bin (1); Wang, Qiao-Lin (1, 2, 3); Wang, Cheng-Wen (1, 2, 3); Liu, Fei (1, 2, 3); Song, Yun-Tao (1, 2, 3); Guo, Zhi-Juan (1, 2, 3) Author affiliation:(1) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding authors:Yang, Zhi-Bin(yzhibin@mail.cgs.gov.cn); Guo, Zhi-Juan(gzhijuan@mail.cgs.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2003-2015 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to evaluate the potential ecological risk of heavy metals in the soil-crop system in the Xiong'an New District, the heavy metal contents and forms in wheat seed and root soil samples are analyzed, and the comprehensive pollution index (IPIN), potential ecological risk index (RI), bio-enrichment coefficient (BFC), risk assessment code (RAC), principal component analysis, and correlation analysis are used to assess the potential ecological risk of heavy metals and analyze their sources. The results indicate that the average content of Cd, Cu, Pb, and Zn in the root soil is significantly higher than the soil background value in Hebei province. The IPIN ranges from 0.2 to 5.18, 94.83% of the soil samples are in the safe and pollution-free grade, and the potential ecological risks of heavy metal are slight and moderate, accounting for 64.66% and 30.17%, respectively. Cd has the greatest potential ecological harm, followed by Hg, Cr, Ni, and Zn. All the heavy metal elements besides Cd in the root soil are dominated by the residual form, which accounts for 60%, and the bioactive form (ion-exchange and water-soluble state) of Cd accounts for 33.43%, indicating relatively high bio-availability. The risk assessment code can be ranked as Cd>Ni>Hg>As>Cu>Cr>Zn>Pb, and the risk of Cd is moderate, while other elements are of low or no risk. The leading potential source of heavy metals is human activity combined with the geological background. The migration and enrichment capability of the wheat seeds is in order from strong to weak of Zn>Cu>Cd>Hg>As>Ni>Pb>Cr, and the biological effective components of As, Cd, Pb, and Zn plays an substantial role in promoting the absorption of heavy metals. The content of heavy metals in the wheat seeds has a negative correlation with the soil pH, and the physical and chemical indices, such as OM and CEC, has bi-directional influence on the biological effective state of the heavy metals.
© 2021, Science Press. All right reserved. Number of references:65 Main heading:Risk assessment Controlled terms:Cadmium - Crops - Ion exchange - Metal analysis - Pollution - Soil surveys - Soils - Zinc Uncontrolled terms:Absorption of heavy metals - Enrichment coefficients - Geological background - Heavy metal contents - Heavy metals in soil - Negative correlation - Potential ecological risk - Risk assessment code Classification code:483.1 Soils and Soil Mechanics - 546.3 Zinc and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 3.02e+01%, Percentage 3.34e+01%, Percentage 6.00e+01%, Percentage 6.47e+01%, Percentage 9.48e+01% DOI:10.13227/j.hjkx.202007253 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804543 Title:Characteristics and Removal Mechanism of an Electro-Hybrid Ozonation-Coagulation System in the Treatment of Organic Matters Title of translation:电凝聚臭氧化耦合工艺的有机物处理特性及去除机制解析 Authors:Xie, Xin-Yue (1); Xu, Jian-Jun (2); Zhang, Shao-Hua (1); Liu, Yu-Guo (1); Jin, Xin (1); Jin, Peng-Kang (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) China Machinery International Engineering Design & Research Institute Co., Ltd.(CMIE) East China Branch, Nanjing; 210046, China Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:883-890 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To improve the removal efficiency of dissolved organic matter in wastewater treatment plant (WWTP) effluent, electro-hybrid ozonation-coagulation (E-HOC) is proposed and the treatment characteristics and removal mechanism for WWTP effluent and ibuprofen (IBP) are investigated. The E-HOC process has a better removal effect on dissolved organic matter in WWTP effluent, achieving 46.4%, 20.0%, 19.4%, 36.1%, and 49.7% higher removal than EC, ozonation, pre-ozonation-EC, electrocoagulation-ozonation, and chemical coagulation, respectively. To determine the mechanism of the E-HOC process, quenching experiments and electron paramagnetic resonance (EPR) were conducted, which confirmed that metal coagulants can be used as a catalyst to effectively increase the generation of the hydroxyl radical (•OH). Synergistic effects between ozone and the coagulants (SOC) were also found to be involved. Fourier-transform infrared spectroscopy (FT-IR) illustrated that the surface hydroxyl groups of the coagulant (hydrolyzed species produced by Al anode electrolysis) were the active sites for the generation of •OH in the SOC reaction. Based on a kinetics analysis of organic matter removal in the E-HOC system, SOC effects and ozonation played dominant roles in the E-HOC process. Additionally, the SOC created a new pathway for •OH formation.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Chemicals removal (water treatment) Controlled terms:Aluminum metallography - Biogeochemistry - Coagulation - Effluent treatment - Effluents - Electron spin resonance spectroscopy - Fourier transform infrared spectroscopy - Organic compounds - Ozone - Ozone water treatment - Ozonization - Paramagnetic resonance - Sewage treatment plants - Wastewater treatment Uncontrolled terms:Chemical coagulations - Dissolved organic matters - Electro coagulations - Electron paramagnetic resonances (EPR) - Fourier transform infra red (FTIR) spectroscopy - Organic matter removal - Surface hydroxyl groups - Wastewater treatment plants Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 531.2 Metallography - 701.2 Magnetism: Basic Concepts and Phenomena - 801 Chemistry - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.94e+01%, Percentage 2.00e+01%, Percentage 3.61e+01%, Percentage 4.64e+01%, Percentage 4.97e+01% DOI:10.13227/j.hjkx.202006158 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247564 Title:Comprehensive Classification Method of Urban Water by Remote Sensing Based on High-Resolution Images Title of translation:基于高分影像的城市水体遥感综合分级方法 Authors:Yang, Zi-Qian (1); Liu, Huai-Qing (1); Lü, Heng (1); Li, Yun-Mei (1); Zhu, Li (2); Zhou, Ya-Ming (2); Li, Ling-Ling (1); Bi, Shun (1) Author affiliation:(1) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing; 210023, China; (2) Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, Beijing; 100029, China Corresponding author:Lü, Heng(Heng.Lyu@njnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2213-2222 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Urban water is a significant part of the urban ecosystem. Therefore, a comprehensive evaluation method of the water environment was proposed based on domestic high-resolution images. The relationships between the spectral characteristics and water quality parameters of urban water were analyzed based on sampling in Nanjing, Wuxi, Changzhou, and Yangzhou from 2017 to 2019. An index named the U-FUI (urban Forel-Ule index) suitable for urban water based on GF-2 images was proposed to achieve the classification of urban water on the basis of the international standard chroma conversion model and the Forel-Ule index. Independent verification data showed that the recognition accuracy of the classification model could reach 72%. The results indicated that urban water can be classified into six classes from Ⅰ to Ⅵ, which represent water colors of blue, light green, dark green, yellow, yellowish brown, and dark grey, respectively, according to the U-FUI. Among them, the water quality of U-FUI Ⅰ water is good, but is rarely distributed in urban water. The concentrations of chlorophyll-a in U-FUI Ⅱ-Ⅲ water are higher than those of the other classes; the concentrations of total suspended solids, particularly inorganic suspended solids, of U-FUI Ⅳ-Ⅴ water are higher than those of the other classes; and the water quality of U-FUI Ⅵ water is poor and the water quality parameters are different from those of the other classes. Meanwhile, the method was successfully applied to the GF-2 image of Nanjing on April 9, 2018. The results showed that the urban water in Nanjing is mainly composed of U-FUI Ⅱ-Ⅳ water, whereas the distribution of U-FUI Ⅰ, Ⅴ, and Ⅵ water is lower in the city. The spatial distribution characteristics were consistent with the results of in-situ sampling in the same period.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Remote sensing Controlled terms:Image classification - Water quality Uncontrolled terms:Classification methods - Classification models - Comprehensive evaluation - Distribution characteristics - International standards - Spectral characteristics - Total suspended solids - Water quality parameters Classification code:445.2 Water Analysis Numerical data indexing:Percentage 7.20e+01% DOI:10.13227/j.hjkx.202008285 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651089 Title:Migration, Transformation Characteristics, and Ecological Risk Evaluation of Heavy Metal Fractions in Cultivated Soil Profiles in a Typical Carbonate-Covered Area Title of translation:典型碳酸盐岩区耕地土壤剖面重金属形态迁移转化特征及生态风险评价 Authors:Tang, Shi-Qi (1, 2, 3); Liu, Xiu-Jin (1, 2, 3); Yang, Ke (1, 2, 3); Guo, Fei (1, 2, 3); Yang, Zheng (1, 2, 3); Ma, Hong-Hong (1, 2, 3); Liu, Fei (1, 2, 3); Peng, Min (1, 2, 3); Li, Kuo (1, 2, 3) Author affiliation:(1) Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3913-3923 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In China, high heavy metal concentrations in cultivated soil are mainly distributed in carbonate-covered areas. The migration and transformation of heavy metals in such soils are influenced by interactions between natural processes and human activities. This study examined the profiles of nine paddy soils, derived from carbonate rocks in Guangxi. The Cd, As, Zn, Cr, Cu, Hg, Ni, and Pb contents we determined, and soil properties such as pH, Corg content, and fractions of Cd, As, Zn, and Cr were tested. Based on the above data, we assessed the vertical distribution of heavy metal fractions, as well as the ecological risks and factors affecting the migration ability of heavy metals, under the influence of human activities and natural soil formation. The results show that compared with the carbonate rocks in Guangxi, the soil profile of the study area is significantly enriched with all eight heavy metals. Among them, Cd, As, Zn, and Cr exceeded China's agricultural land (paddy field) pollution risk screening values, and Cd and As partially exceed the risk intervention values. All fractions of Cd in the soil profiles are widely distributed. The proportion of water-soluble and ion-exchange Cd fractions with high ecological risk decreased significantly from the surface to greater depths in the soil profile. As, Zn, and Cr in the soil profile were mainly in residual states, and the proportion of water-soluble and ion-exchange fractions did not change considerably with increasing depth. The evaluation results of RAC and RSP show that Cd pollution risk in the study area is relatively high, whereas As, Zn, and Cr are generally pollution-free or risk-free. In naturally developed soil in the study area, the clay mineral content and degree of soil development have significant effects on Cd migration, whereas in the cultivated layer affected by human activities, the soil pH and organic matter content are the main controlling factors. The migration ability of soil As is mainly related to soil organic matter, Fe2O3 content, and soil development degree, but organic matter has an obviously enhanced effect in the tillage layer. The main controlling factor of Zn and Cr migration in soil is pH, and the effects are more intense under the disturbance of human activities.
© 2021, Science Press. All right reserved. Number of references:63 Main heading:Soil surveys Controlled terms:Agricultural robots - Agriculture - Biogeochemistry - Cadmium - Carbonates - Carbonation - Chromium - Hematite - Ion exchange - Organic compounds - pH effects - Pollution - Risk assessment - Risk management - Sedimentary rocks - Soils Uncontrolled terms:Evaluation results - Heavy metal concentration - Heavy metal fractions - Main controlling factors - Migration ability - Organic matter content - Soil organic matters - Vertical distributions Classification code:482.2 Minerals - 483.1 Soils and Soil Mechanics - 543.1 Chromium and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1 Chemistry, General - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202101066 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651032 Title:Distribution and Sources of Microplastics in Farmland Soil Along the Fenhe River Title of translation:汾河沿岸农田土壤微塑料分布特征及成因解析 Authors:Zhu, Yu-En (1); Wen, Han-Xuan (1); Li, Tang-Hui-Xian (1); Li, Hua (1); Wu, Chao (2); Zhang, Gui-Xiang (3); Yan, Jing (1) Author affiliation:(1) Shanxi Laboratory for Yellow River, School of Environment and Resources, Shanxi University, Taiyuan; 030006, China; (2) Shanxi Institute of Yellow River Environment and Resource Economy, Taiyuan; 030006, China; (3) School of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan; 030024, China Corresponding author:Zhang, Gui-Xiang(zhanggx@tyust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3894-3903 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study investigated the distribution and sources of microplastics smaller than 1 mm in farmland soil along the Fenhe River. Microplastics in soil samples were separated and extracted using the traditional density centrifugation method. The quantity and type of microplastics were examined with a stereomicroscope. The micro-morphology of plastic particles were observed with a scanning electron microscope-energy dispersive spectrometer. The chemical composition was determined using Fourier transform infrared spectroscopy. The results indicate that the average abundance of microplastics in farmland soil along the Fenhe River is 290.5 n•kg-1. These microplastics occur as fibers, films, fragments, and foams. Fiber microplastics are the most abundant, accounting for 52.67% of the total, and are mostly composed of polyethylene. Films and fragments mainly consist of polypropylene whereas the foams consist of polystyrene. Soil samples from different parts of the Fenhe River can be ranked according to the microplastics content in the following order: downstream>midstream>upstream. The abundance of microplastics in soil from the downstream region of the Fenhe River was 500.0 n•kg-1, twice that of from the upstream and midstream regions. The results of the random forest model indicate that the sources of microplastics in farmland soil along the Fenhe River are closely related to the amount of agricultural films, population, gross domestic product, and industrial production. Among these factors, the amount of agricultural films is a key factor that influences the occurrence of microplastics in farmland soil along the Fenhe River.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Rivers Controlled terms:Agricultural robots - Decision trees - Farms - Fourier transform infrared spectroscopy - Microplastic - Polypropylenes - Scanning electron microscopy - Soil surveys - Soils - Spectrometers Uncontrolled terms:Centrifugation methods - Chemical compositions - Energy dispersive spectrometers - Gross domestic products - Industrial production - Micromorphologies - Random forest modeling - Traditional density Classification code:483.1 Soils and Soil Mechanics - 741.3 Optical Devices and Systems - 801 Chemistry - 815.1.1 Organic Polymers - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 961 Systems Science Numerical data indexing:Percentage 5.27e+01%, Size 1.00e-03m DOI:10.13227/j.hjkx.202012072 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650977 Title:Differentiation of Hydrogen and Oxygen Isotopes in the Water Source Treatment Wetlands of Stream Networks Title of translation:河网水源生态湿地水氢氧同位素分异特征 Authors:Yang, Ting (1, 2); Wang, Yang (1, 2); Xu, Jing-Yi (1, 2, 3); Wu, Ping (4); Wang, Wei-Dong (1) Author affiliation:(1) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Ecology, College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100094, China; (4) Water Resources & Hydroelectric Prospecting & Design Research Institute of Jiaxing City, Jiaxing; 314001, China Corresponding author:Wang, Wei-Dong(wdwang@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3695-3708 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the isotopic distribution and differentiation of water along the hydraulic flow gradients and plant-bed/ditch systems in constructed root-channel wetlands, surface and subsurface water samples were collected from four ecological wetlands, namely Shijiuyang and Guanjinggang in Jiaxing, as well as Changshuitang and Taishangang in Haining. All samples were collected along water flow pathways during the wet and rainy summer season in August 2019, except for those from Taishangang, which were collected within the plant-bed/ditch system during the dry and cold winter season in January 2020. The abundance of deuterium (δD) and δ18O was determined in each functional area of the wetlands to assess the influence of wetlands on water differentiation. Stable isotope technology and mathematical statistics were used to analyze the distribution of δD and δ18O in constructed root-channel wetlands and to reveal the influence of plant-bed/ditch systems on stable isotopes of water. A variety of data mining methods were used to examine the differentiation of stable isotopes of water, at various dimensions and scales, including nonparametric Kendall's tau-b correlation, stepwise regression, gray relational analysis, and machine learning (random forest) combined with scatter diagrams and model hypothesis diagnosis analysis. The main results were as follows: ① The spatiotemporal variations in water isotopes of stream networks were largely affected by different water supply and evaporation enrichment effects. The slope and intercept of the wetland water line in Jiaxing were both significantly lower than the regional precipitation line of the adjacent Changshu Station (CHNIP). This showed that the wetlands area had undergone hydrogen and oxygen isotope enrichment. The δD values in Shijiuyang wetland water ranged from -52.2‰ to -49.4‰, and δ18O values ranged from -7.6‰ to -6.9‰. In Guanjinggang wetland water samples, δD ranged from -48.1‰ to -45.1‰, and δ18O ranged from -6.8‰ to -5.8‰. The δD values in Changshuitang wetland water ranged from -49.8‰ to -48.4‰, and δ18O ranged from -7.2‰ to -6.6‰. The δD values in Taishangang wetland water ranged from -55.3‰ to -51.6‰, and δ18O ranged from -7.8‰ to -7.2‰. ② Hydrogen and oxygen isotope abundance and composition of water showed complex nonlinear changes in the vertical and horizontal dimensions at different scales. At the regional scale, water level elevation in the vertical dimension had a greater impact on water isotope distribution than the length of the hydraulic flow pathway in the horizontal dimension. Water isotopes tended to be enriched in low-lying areas with low water levels. At the local scale, the influence of hydraulic process often played a greater role in determining water isotope distributions. The spatial variations of water isotopes were comprehensively determined by the evaporation of regional water and meandering hydraulic processes inside the wetland. ③ Compared with other wetland functional areas, the central constructed root-channel area (middle treatment zone) was more enriched in water isotopes. ④ The underground macropore network formed by plants with developed rhizomes or roots (e.g., Phragmites communis Trin. and Typha orientalis Presl), mineral-rich substrate soil, and aquatic plants in the plant bed had a significant influence on the abundance of hydrogen and oxygen isotopes in the plant-bed/ditch system. Therefore, when water passed through the plant-bed/ditch system, the values of δD and δ18O in the lower ditch (outlet) were lower than those in the higher ditch (inlet). ⑤ The abrupt change in isotopic contents of the plant-bed/ditch system might indicate an inflection point in water quality purification. ⑥ The deuterium excess (d-excess) in subsurface water of the plant-bed/ditch system was significantly higher than that in ditch water, and the coefficient of variation in subsurface water was considerably greater than that in ditch water. The d-excess in the wetland root-channel ecological purification zone showed significant temporal differences and was negative in the summer and positive in the winter, which reflected the seasonal variation in water vapor sources and the spatial variation in isotope fractionation behavior in wetlands. These results provide some understanding of the distribution of water isotopes in constructed wetlands, which will strengthen their operation and management. This study also provides some ideas regarding new technologies for water quality improvement and shows that water isotope technology may be a reliable method for analyzing wetland hydrology.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Water treatment Controlled terms:Data mining - Decision trees - Deuterium - Ecology - Evaporation - Flow of water - Hydrogen - Hydrology - Oxygen - Purification - Random forests - Statistics - Water levels - Water quality - Water supply - Wetlands Uncontrolled terms:Coefficient of variation - Gray relational analysis - Isotopic distributions - Operation and management - Spatio-temporal variation - Stable isotope technologies - Stable isotopes of water - Water quality improvements Classification code:445.1 Water Treatment Techniques - 445.2 Water Analysis - 446.1 Water Supply Systems - 454.3 Ecology and Ecosystems - 631.1.1 Liquid Dynamics - 723.2 Data Processing and Image Processing - 802.3 Chemical Operations - 804 Chemical Products Generally - 922.2 Mathematical Statistics - 961 Systems Science DOI:10.13227/j.hjkx.202012229 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651005 Title:Ammonia Nitrogen Removal Performance with Parallel Operation of Conventional and Inverted A2/O Sewage Treatment Processes in Winter Title of translation:A2/O与倒置A2/O工艺低温条件下的氨氮去除能力解析 Authors:Li, Jin-Cheng (1, 2); Guo, Ya-Ni (1); Qi, Rong (2); Yang, Min (2) Author affiliation:(1) School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an; 710048, China; (2) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding authors:Guo, Ya-Ni(guoyani2002@163.com); Qi, Rong(qirong@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3866-3874 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Ammonia nitrogen (NH4+-N) removal capacities of the A2/O and inverted A2/O processes were analyzed with the same inlet and parallel operation during winter. When the operating water temperature was 14℃, the inverted A2/O process exhibited lower NH4+-N removal from the volumetric load[0.13 kg•(m3•d)-1vs. 0.29 kg•(m3•d)-1] and a lower ammonia oxidation rate (AOR)[0.07 kg•(kg•d)-1 vs. 0.11 kg•(kg•d)-1] than the A2/O process, whereas the two processes exhibited similar performance at 26℃.The quantitative results for the ammonia oxidizing bacteria (AOB) population were almost the same in the two parallel processes (3.2%±0.24% for the inverted A2/O process and 3.4%±0.31% for the A2/O process). Clone library analysis showed that at low temperatures, the inverted A2/O process had a lower capacity for ammonia nitrogen removal than A2/O process. This is because the particular AOB species [spirillum (Nitrosospira)] facilitated the slower AOR type (K-growth strategy) of nitrosation in the inverted A2/O process, whereas in the A2/O process, the faster AOR type (r-growth strategy) of nitrosation was facilitated by bacterium (Nitrosomonas). At 26℃, the dominant species in the two processes were Nitrosomonas. Through comprehensive analysis of the pollutants during the removal process, we found that although temperature is the leading cause of AOB advantage in species succession, the changes in the inverted A2/O process structure, caused by the aerobic unit, resulted in high COD load and high NH4+-N concentration, which were unfavorable for the growth of AOB. This shows that under conventional sewage conditions, the K-growth strategy is advantageous for the AOB species. Therefore, the structure of the inverted A2/O process for heterotrophic bacteria (phosphorus accumulating bacteria and denitrifying bacteria) indirectly affects the population distribution and succession of autotrophic ammonia-oxidizing bacteria, through COD load and other factors, thereby leading to weakened nitrification capacity at low temperatures.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Bacteria Controlled terms:Ammonia - Chemical oxygen demand - Denitrification - Nitrogen removal - Sewage treatment - Strategic planning Uncontrolled terms:Ammonia nitrogen removal - Ammonia oxidizing bacteria - Autotrophic ammonia-oxidizing bacterium - Comprehensive analysis - Denitrifying bacteria - Heterotrophic bacterias - Phosphorus accumulating - Sewage treatment process Classification code:452.2 Sewage Treatment - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 912.2 Management DOI:10.13227/j.hjkx.202011157 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651017 Title:Temporal and Spatial Evolution Characteristics of DOM Spectra in Sediment Interstitial Water in Typical Zones of Baiyangdian Lake Title of translation:白洋淀典型淀区沉积物间隙水溶解性有机物的光谱时空演变特征 Authors:Zhou, Shi-Lei (1); Chen, Zhao-Ying (1); Zhang, Tian-Na (1); Zhang, Zi-Wei (1); Sun, Yue (1); Yao, Bo (1); Cui, Jian-Sheng (1); Li, Zai-Xing (1); Luo, Xiao (1) Author affiliation:(1) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3730-3742 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The sources and distribution of dissolved organic matter (DOM) in the interstitial water of Baiyangdian Lake sediments were analyzed using the ultraviolet-visible absorption spectrum (UV-vis) method and three-dimensional excitation emission matrix fluorescence spectroscopy-parallel factor analysis (EEM-PARAFAC). Results showed that the DOM concentrations and molecular weight were significantly higher in summer than in spring and autumn, based on a254 and E2/E3 values. Three protein-like substance (C1, C2, and C3) and two humic-like substances (C4, C5) were identified with the PARAFAC model. Moreover, protein-like substances accounted for the majority of DOM, reaching (63.56±16.07)%. Total DOM fluorescence intensity, the fluorescence intensity of each component, and the relative abundance exhibited significant spatial variation among the different functional zones in Baiyangdian Lake. Protein-like substances were mainly found in the breeding area, whereas humic-like substances mainly occurred in the natural area. The high BIX, FI, β:α, and low HIX indicated that DOM in sediment interstitial water exhibited low humification and highly autochthonous characteristics. Moreover, the perfect regression equations between water quality and the fluorescent components could provide a useful reference for managers aiming to protect the ecosystem of Baiyangdian Lake.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Water absorption Controlled terms:Absorption spectroscopy - Fluorescence - Fluorescence spectroscopy - Lakes - Proteins - Sediments - Water quality Uncontrolled terms:Dissolved organic matters - Excitation-emission matrix fluorescence spectroscopies - Fluorescence intensities - Humic-like substances - Parallel factor analysis - Regression equation - Temporal and spatial evolutions - Ultraviolet-visible absorption spectrum Classification code:445.2 Water Analysis - 483 Soil Mechanics and Foundations - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202011063 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404254 Title:Key Problems and Novel Strategy of Controlling Emerging Trace Organic Contaminants During Municipal Wastewater Reclamation Title of translation:城市污水再生处理中微量有机污染物控制的关键难题与解决思路 Authors:Wang, Wen-Long (1); Wu, Qian-Yuan (1); Du, Ye (2); Huang, Nan (3); Lu, Yun (3); Wei, Dong-Bin (4); Hu, Hong-Ying (3, 5) Author affiliation:(1) Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen; 518055, China; (2) College of Architecture & Environment, Sichuan University, Chengdu; 610000, China; (3) State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing; 100084, China; (4) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (5) Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen; 518055, China Corresponding author:Hu, Hong-Ying(hyhu@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2573-2582 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Emerging trace organic contaminants (TOrCs) have been ubiquitously detected in municipal wastewater. TOrCs show low concentrations but are usually harmful to aquatic biota and recalcitrant to treatments. The advanced treatment of TOrCs is challenged by four main aspects. First, it is hard to qualify the chemical structure and concentrations of TOrCs, which are typically very low. Second, risk assessment results vary with the selection of target-species and toxicity-endpoints, which makes it hard to regulate priority lists and concentration limits. Third, TOrCs account for less than 0.01% of the total organics in wastewater. Thus, TOrCs cannot be selectively and efficiently removed by conventional treatments. Fourth, it is hard to optimize and manage the treatment trains of TOrCs. In this manuscript, a new strategy combing non-targeting TOrC screening and TOrC "fingerprinting" are proposed to overcome the difficulties of quantification and treatment optimization. Based on this, the standards and regulations to control the TOrCs in reclaimed water should be developed on the basis of elimination efficiency rather than concentration.
© 2021, Science Press. All right reserved. Number of references:65 Main heading:Wastewater reclamation Controlled terms:Risk assessment Uncontrolled terms:Concentration limits - Conventional treatments - Low concentrations - Municipal wastewater reclamation - Municipal wastewaters - Toxicity endpoints - Trace organic contaminants - Treatment optimization Classification code:452.4 Industrial Wastes Treatment and Disposal - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.00e-02% DOI:10.13227/j.hjkx.202009251 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650958 Title:Emission Characteristics and Atmospheric Chemical Reactivity of Volatile Organic Compounds(VOCs) in Automobile Repair Industry Title of translation:汽车维修行业挥发性有机物排放特征及大气化学反应活性 Authors:Chen, Peng (1); Zhang, Yue (1); Zhang, Liang (2); Xiong, Kai (1); Xing, Min (1); Li, Shan-Shan (1) Author affiliation:(1) Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) Mentougou District Environmental Protection Monitoring Station of Beijing Municipality, Beijing; 102300, China Corresponding author:Li, Shan-Shan(liss0502@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3604-3614 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Volatile organic compounds (VOCs) emitted by the automobile repair industry are an important source of ozone precursors. However, the current reduction policy generally focuses on the emissions of VOCs, without considering their chemical reactivity. Based on an investigation of the development status of China's automobile repair industry, this study analyzes VOCs emission nodes in different sections of automobile repair enterprises. The amount and VOCs content of paint in each section was determined, and a material balance algorithm was used for sections with different VOCs quantities and compositions to analyze the emission characteristics of exhaust VOCs. The atmospheric reactivity of VOCs components was evaluated by calculating ozone generation potential (OFP). The results show that VOCs components produced by automobile repair paint are mainly benzene homologues, with butyl acetate and xylene the highest. Varnish is the largest contributor to VOCs emissions in automobile repair industries (92%), due to its high VOCs content and high dosage. The VOCs content of solvent-based coatings (22%) is higher than that of water-based coatings (3%). The application of water-based coatings leads to a remarkable reduction in VOCs emissions in automobile repair industries. A total of 49 VOCs components have been detected in gas from exhaust cylinders, with the top 10 VOCs components accounting for 97.9% of the total emissions. The main pollutants are aromatic hydrocarbons (10 types, 30.90%- 69.30%), and OVOC (12 types) and halogenated hydrocarbons (22 types) were the second-highest contributors, with contribution rates of 8.82%- 43.71% and 2.40%- 25.00%, respectively. Aromatic hydrocarbon is the largest VOCs component emitted by automobile repair industries, but the main types of VOCs vary greatly in different studies. VOCs discharged by automobile repair industries have an average OFP value of 194.04 mg•m-3 and an average SR value of 3.37 g•g-1. The m/p-xylene component contributes the most to OFP (70.24%) and is the preferred pollutant in automobile repair industry. Aromatic hydrocarbons contribute a maximum of 99.29% to the OFP value and are also the most chemically reactive component. Although esters account for a large proportion of VOCs, their contribution to OFP is relatively low. Therefore, the automobile repair industry should focus on controlling the emission of aromatic hydrocarbons.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Aromatic hydrocarbons Controlled terms:Air pollution - Aromatization - Atmospheric chemistry - Automobiles - Gas emissions - Mineral oils - Ozone - Paint - Volatile organic compounds Uncontrolled terms:Contribution rate - Current reduction - Development status - Emission characteristics - Halogenated hydrocarbons - Reactive components - Solvent-based coatings - Water-based coating Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 513.3 Petroleum Products - 662.1 Automobiles - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 813.2 Coating Materials Numerical data indexing:Percentage 2.20e+01%, Percentage 2.40e+00% to 2.50e+01%, Percentage 3.00e+00%, Percentage 3.09e+01% to 6.93e+01%, Percentage 7.02e+01%, Percentage 8.82e+00% to 4.37e+01%, Percentage 9.20e+01%, Percentage 9.79e+01% DOI:10.13227/j.hjkx.202010081 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651065 Title:Temporal-spatial Distribution and Risk Assessment of Polycyclic Aromatic Hydrocarbons in Soil of Xiangxi Bay in Three Gorges Reservoir Area Title of translation:三峡库区香溪河库湾土壤多环芳烃时空分布特征及风险评价 Authors:Huang, Ying-Ping (1, 2); Jin, Lei (1, 2); Zhu, Can (1, 2); Li, Kun (1, 2); Xie, Ping (1, 2); Johnson, David (2, 3); Liu, Hui-Gang (2); Xi, Ying (1, 2) Author affiliation:(1) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang; 443002, China; (3) College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang; 443002, China Corresponding author:Xi, Ying(hellox-y@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3808-3819 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The US Environmental Protection Agency has listed 16 polycyclic aromatic hydrocarbons (PAHs) for priority control. Soil samples from Xiangxi Bay in the Three Gorges Reservoir Area (the water fluctuation zone, WLFZ; upper edge of water fluctuation zone, UEWLFZ; sediments) were analyzed for the concentration of these PAHs, using high performance liquid chromatography (HPLC). The results showed that the soil samples of Xiangxi Bay could be ranked, based on the concentration of PAHs, in the following order: UEWLFZ>WLFZ>sediment. The composition of PAHs varied from the three regions, with 3- and 4-ring PAHs dominating in sediments and 4- and 5-ring PAHs dominating in soil from the WLFZ and UEWLFZ. The composition of PAHs in soil from the WLFZ exhibited a higher coefficient of variation and a weaker correlation with the composition of PAHs in soil from the UEWLFZ and sediment. Soil from the three regions showed varying seasonal distributions of PAHs, which is closely related to the quantity and types of energy consumption in each season. PAHs in sediment from sites at the same altitude showed no evident differences, whereas WLFZ and UEWLFZ soil had higher levels of PAHs at the sites near Xiakou Town and the Yangtze River Estuary. Isomer ratio analysis showed that the sources of PAHs in Xiangxi Bay vary between seasons and regions, with incomplete combustion of fossil fuels and biomass forming the main sources in the soil of Xiangxi Bay. The lifetime carcinogenic risk assessment shows that PAHs in sediment, WLFZ, and UEWLFZ have a potential risk to human through ingestion and dermal contact, with PAHs in the soil of UEWLFZ posing the highest carcinogenic risk. The results provide a theoretical reference for the prevention and control of contamination by PAHs in Xiangxi Bay of the Three Gorges Reservoir area.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Polycyclic aromatic hydrocarbons Controlled terms:Energy utilization - Environmental Protection Agency - Fossil fuels - High performance liquid chromatography - Mineral oils - Reservoirs (water) - Risk assessment - Sediments - Soil surveys - Soils Uncontrolled terms:Carcinogenic risk assessments - Coefficient of variation - Polycyclic aromatic hydrocarbons (PAHS) - Prevention and controls - Seasonal distributions - Temporal spatial distribution - Three gorges reservoir area - US Environmental Protection Agency Classification code:441.2 Reservoirs - 454.2 Environmental Impact and Protection - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 513.3 Petroleum Products - 525.3 Energy Utilization - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202012149 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650983 Title:Characteristics and Control Strategies on Summertime Peak Ozone Concentration in Shanghai Title of translation:上海市夏季臭氧污染特征及削峰方案 Authors:Yan, Ru-Sha (1); Wang, Hong-Li (1); Huang, Cheng (1); Wang, Qian (1); An, Jing-Yu (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3577-3584 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
With the continuous development of air pollution control measures, the concentration of PM2.5 in Shanghai has shown a conspicuous downward trend in recent years. However, frequent O3 pollution events have highlighted the urgent need to explore the occurrence patterns of O3 pollution and develop scientific strategies for reducing O3 peaks. This study examines data from July 2017, when the cumulative number of O3 pollution days in 17 cities in the Yangtze River Delta was 165 days, of which Shanghai was the most serious, with an exceedance rate of 64.5%. During this period, the average concentration of NO2 in Shanghai was 27.1 μg•m-3 and volatile organic copunds (VOCs) mixing ratio was 22.5×10-9. By analyzing ozone precursor concentrations and meteorological factors, we determined that these events mainly resulted from a combination of unfavorable meteorological conditions such as high temperature, low humidity, low wind speed, and high precursor emissions. WRF-CMAQ scenario simulations showed that a reduction in precursor emissions in Shanghai alone would have a limited controlling effect on regional O3 pollution. Thus, regional joint control is recommended when widespread pollution events occur. Our analysis shows that if VOCs in Shanghai and nine neighboring cities can be reduced by 30%, the maximum 8-h O3 concentration in Shanghai could be reduced by 7.2%. If the reduction number of these cities rises to 17, the maximum 8-h O3 concentration reduction rate in Shanghai will increase to 7.8%. It is also recommended that the VOCs:NOx reduction ratio should be strictly controlled at more than 3:1, or else the O3 concentration in some areas will increase.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:River pollution Controlled terms:Air pollution - Air pollution control - Nitrogen oxides - Ozone - Wind Uncontrolled terms:Average concentration - Concentration reduction - Continuous development - Meteorological condition - Meteorological factors - Peak ozone concentration - Scenario simulations - Yangtze river delta Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 451.2 Air Pollution Control - 453 Water Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Age 4.52e-01yr, Percentage 3.00e+01%, Percentage 6.45e+01%, Percentage 7.20e+00%, Percentage 7.80e+00% DOI:10.13227/j.hjkx.202011243 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650991 Title:Temporal and Spatial Evolution of Non-point Source Pollution Load of Total Nitrogen in Tuojiang River Basin Title of translation:沱江流域总氮面源污染负荷时空演变 Authors:Xiao, Yu-Ting (1); Yao, Jing (1); Chen, Shu (1); Fan, Min (1) Author affiliation:(1) School of Environment and Resource, Southwest University of Science and Technology, Mianyang; 621010, China Corresponding author:Fan, Min(firstfanmin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3773-3784 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Currently, the aquatic environment of the Tuojiang River basin in Sichuan Province is severely polluted by non-point sources of total nitrogen (TN). This study adopts the pollution discharge coefficient method to estimate the TN pollution load of non-point sources in this watershed during 2007- 2017. The temporal and spatial distribution and transfer trends of the TN pollution load in the Tuojiang River basin were examined, based on center-of-gravity statistical and spatial analysis technology. This study aimed to provide an accurate theoretical basis for the prevention and early identification of non-point source pollution in the Tuojiang River basin. The results indicate that livestock breeding was the main non-point source of TN pollution and contributed more than 45% to the TN pollution load during 2007- 2017. The contribution rate of rural life and domestic waste decreased continually during the study period, whereas that of farmland solid waste and farmland runoff exhibited an increasing trend. The total pollution load of TN exhibited a decreasing trend during 2007- 2017. The maximum and minimum TN pollution loads occurred in 2010 and 2017 with values of 5.7×104 t and 4.69×104 t, respectively. Spatial heterogeneity of the pollution load, together with the uneven distribution of rainfall runoff, caused a shift from northwest to southeast in the pollution-load centers of gravity for livestock and poultry breeding, farmland solid waste, and farmland runoff. Southeast of the watershed is the key area for prevention and control of these pollution sources. A shift in the centers of gravity for rural living and household waste pollution, from southeast to northwest, was attributed to agricultural populations transforming to urban populations in the southeastern counties. The maximum transfer range was 66.35 km2, and this minimum boundary circle is the key identification area of pollution source pollution load change. Northwest of Tuojiang River basin is the key area in which TN pollution from rural living and rural household waste can be prevented. This research expands the methods for exploring the temporal and spatial evolution of pollution load in the Tuojiang River basin, which is of great significance for improving the aquatic environment and promoting sustainable development of the basin economy.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:River pollution Controlled terms:Agricultural robots - Farms - Nitrogen - Pollution control - Rivers - Runoff - Rural areas - Solid wastes - Spatial distribution - Sustainable development - Watersheds Uncontrolled terms:Non-point source pollution - Pollution discharges - Prevention and controls - Rural household wastes - Spatial heterogeneity - Temporal and spatial distribution - Temporal and spatial evolutions - Total pollution loads Classification code:444.1 Surface Water - 453 Water Pollution - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics Numerical data indexing:Area 6.63e+07m2 DOI:10.13227/j.hjkx.202011120 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688814 Title:Effects of Farmland Abandonment on Soil Enzymatic Activity and Enzymatic Stoichiometry in the Loess Hilly Region, China Title of translation:黄土丘陵区撂荒农田土壤酶活性及酶化学计量变化特征 Authors:Zhong, Ze-Kun (1, 2); Yang, Gai-He (1, 2); Ren, Cheng-Jie (1, 2); Han, Xin-Hui (1, 2) Author affiliation:(1) College of Agronomy, Northwest A&F University, Yangling; 712100, China; (2) Shaanxi Engineering Research Center of Circular Agriculture, Yangling; 712100, China Corresponding author:Yang, Gai-He(ygh@nwsuaf.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:411-421 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Clarifying the characteristic of soil enzymatic activity and stoichiometry variations as well as their influencing factors following farmland abandonment have important implications for understanding soil nutrient availability after revegetation and for illuminating the underlying mechanisms of soil nutrient cycling in ecosystems. To determine microbial nutrient limitations after farmland abandonment and to explore the driving factors of the variations in soil enzymatic activity and stoichiometry along a chronosequence of abandoned farmlands (0-, 10-, 20-, and 30-year-old) in the Loess Hilly Region, China, the potential activities of carbon (C)-, nitrogen (N)-, and phosphorus (P)-acquiring enzymes, soil physicochemical properties, and plant diversity and family composition were measured. The results showed that the activities of β-1,4-N-acetylglucosaminidase (NAG), leucine aminopeptidase (LAP), and alkaline phosphatase (ALP) increased significantly with the increasing years of land abandonment, whereas the activity of β-1,4-glucosidase (BG) showed the opposite change trend. Additionally, the ratios of BG:(NAG+LAP) and BG:ALP had the same variation trend with BG activity, which decreased significantly with increasing time, but the ratio of (NAG+LAP):ALP showed an increasing trend and then decreased, with the highest values observed in the 20-year sites. Moreover, the vector length of soil enzymatic stoichiometry decreased significantly as the years of land abandonment inceased, suggesting a reduced microbial C limitation after farmland abandonment. The vector angles <45°were observed at farmlands (0-year sites) and 10-year sites, whereas angles >45°were detected at 20-and 30-year sites, indicating that soil microbial communities were N-limited in the first 10 years of land abandonment and thereafter were P-limited. The redundancy analysis (RDA) reveled that soil organic C content, total N content, the C:N and C:P ratios, soil pH values, and plant diversity had significant effects on soil enzymatic activity and stoichiometry. A variation partitioning analysis (VPA) further demonstrated that edaphic and vegetation factors explained 62.0% of the total variance of soil enzymatic activity and stoichiometry. It should be noted that the interaction between vegetation characteristics and soil physicochemical properties was the major factor affecting soil enzymatic activity and stoichiometry, which explained 37.1% of the variance of the soil enzyme characteristics. Collectively, the application of P fertilizer should be considered to mitigate the deficiency of available P in the ecosystem during farmland abandonment, and these findings may provide a theoretical basis for understanding the mechanisms underlying microbe-mediated biogeochemical cycles as well as guiding soil nutrient management and the sustainable development of the ecological environment.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Soils Controlled terms:Alkalinity - Biogeochemistry - Ecosystems - Farms - Microorganisms - Nutrients - Phosphatases - Physicochemical properties - Revegetation - Sediments - Soil conservation - Stoichiometry - Sustainable development - Vegetation Uncontrolled terms:Ecological environments - Leucine aminopeptidase - Nutrient limitations - Redundancy analysis (RDA) - Soil enzymatic activities - Soil microbial community - Soil nutrient cycling - Soil physico-chemical properties Classification code:442.2 Land Reclamation - 454.3 Ecology and Ecosystems - 461.9 Biology - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 801 Chemistry - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Age 0.00e+00yr, Age 1.00e+01yr, Age 2.00e+01yr, Age 3.00e+01yr, Percentage 3.71e+01%, Percentage 6.20e+01% DOI:10.13227/j.hjkx.202006112 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065981 Title:Spatio-Temporal Characteristics and Potential Source Areas of Seasonal Atmospheric Pollution in Shijiazhuang Title of translation:石家庄市大气污染物的季节性时空特征及潜在源区 Authors:Nie, Sai-Sai (1); Wang, Shuai (1); Cui, Jian-Sheng (1); Liu, Da-Xi (1); Chen, Jing (2); Tian, Liang (1); He, Bo-Wen (1); Shen, Meng-Yu (2) Author affiliation:(1) School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China; (2) Shijiazhuang Meteorological Bureau, Shijiazhuang; 050081, China Corresponding author:Cui, Jian-Sheng(cui1603@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5131-5142 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to systematically study the transmission characteristics of seasonal and typical pollutants in Shijiazhuang, hourly data of ground-level pollutants(PM2.5, PM10, O3, NO2, SO2, and CO)from 46 state-and provincial-controlled stations, and meteorological(temperature, humidity, and wind speed)data from 17 counties in Shijiazhuang City from December 2018 to November 2019 was analyzed. The interpolation(IDW)and correlation analysis were applied to seasonal and temporal spatial patterns of pollutant concentration. The backward trajectories analysis was performed to explore the seasonal transmission pattern and potential source areas of pollution in Shijiazhuang by combining with the global data assimilation system(GDAS). The results indicate that the different seasons have characteristic pollutants, as follows: spring(PM10, 48.91%), summer(O3, 81.97%), autumn(PM10 and PM2.5, 47.54% and 32.79%), and winter(PM2.5, 74.44%), which are related to the variation of meteorological conditions. Furthermore, the PM10(spring)concentration correlated negatively with the wind speed, presenting a high distribution in the northwest and low in the southeast, with a southerly transmission direction(53.32%). Central and southern Hebei, central and northern Henan, and central Shanxi are the potential sources of pollution(WPCWTij≥160 μg•m-3), impacting western Shandong and northwest Shanxi(WPSCFij≥0.3)with PM10. Moreover, the O3(summer)concentration correlated positively with temperature, and negatively with humidity. The southeast-south(54.24%)is the source direction of the transmission, and the potential source of O3 pollution is an arc area with Shijiazhuang in the center and Cangzhou and Heze as the double wings. Lastly, the PM2.5(autumn and winter)concentration correlated positively with humidity, and the winter concentration shows an increasing gradient from west to east. The trajectories of PM2.5 clustered the source directions: autumn(northeast-southeast, 74.75%), winter(northwest, 55.47%); central and southern Hebei, central and western Shanxi and northern Henan are the concentrated sources of potential pollution(WPCWTij≥180 μg•m-3).
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Trajectories Controlled terms:Atmospheric humidity - Humidity control - Pollution - Transmissions - Wind Uncontrolled terms:Atmospheric pollutants - Hybrid single particle lagrangian integrated trajectory - Lagrangian - Potential source area - Potential sources - Seasonal variation - Shijiazhuang - Single-particle - Source area - Spatiotemporal evolution Classification code:443.1 Atmospheric Properties - 602.2 Mechanical Transmissions Numerical data indexing:Mass 1.60E-07kg, Mass 1.80E-07kg, Percentage 3.279E+01%, Percentage 4.754E+01%, Percentage 4.891E+01%, Percentage 5.332E+01%, Percentage 5.424E+01%, Percentage 5.547E+01%, Percentage 7.444E+01%, Percentage 7.475E+01%, Percentage 8.197E+01% DOI:10.13227/j.hjkx.202102120 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065974 Title:Atmospheric NH3 Emission Inventory and Analysis of the Driving Force in Zhengzhou City Title of translation:郑州市大气氨排放清单及驱动力分析 Authors:Ji, Yao (1); Wang, Chen (2); Lu, Xuan (1); Zhang, Huan (1); Yin, Sha-Sha (3) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) College of Environmental and Resource Sciences, Zhejiang University, Hangzhou; 310058, China; (3) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Yin, Sha-Sha(shashayin@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5220-5227 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, a 2017-based emission inventory of ammonia(NH3)was established for Zhengzhou by using the emission factor method. The 1 km×1 km gridded emission inventory was mapped using GIS technology. The NH3 emissions between 2007 and 2017 and driving force between 1989 and 2017 were also analyzed. Results showed that the total 2017-based NH3 emission in Zhengzhou was 18 143.3 t, and the average emission intensity reached 2.4 t•km-2. The top emission source was from agriculture, accounting for 63.4% of the total emission, followed by fugacity(11.3%). The main contribution sources of livestock were egg poultry, pigs, and cattle. Dengfeng, Xingyang, and Xinmi had the highest emissions, accounting for 19.3%, 16.5%, and 15.6% of the total emission, respectively. The NH3 emission was higher in the southern and central western regions of Zhengzhou and lower in the northeastern region. The NH3 emission in Zhengzhou showed a downward trend from 2007 to 2017. The NH3 emissions from 1987 to 2017 were similar to the environmental Kuznets Curve, i.e., the emissions increased first and then decreased with the increase of per capita gross domestic product(GDP)and urbanization rate.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Ammonia Controlled terms:Agriculture - Economic and social effects - Mammals Uncontrolled terms:Ammonia(NH3) - Correlation analysis - Driving forces - Emission analysis - Emission factors - Emission inventories - Emissions trends - Factor methods - Total emissions - Urban scale Classification code:804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 971 Social Sciences Numerical data indexing:Percentage 1.13E+01%, Percentage 1.56E+01%, Percentage 1.65E+01%, Percentage 1.93E+01%, Percentage 6.34E+01%, Size 1.00E+03m DOI:10.13227/j.hjkx.202102176 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065976 Title:Characteristics of BTEX and Health Risk Assessment During Typical Pollution Episodes in Summer and Winter in Tianjin Urban Area Title of translation:天津城区夏冬季典型污染过程中BTEX变化特征及其健康风险评估 Authors:Han, Ting-Ting (1); Li, Ying-Ruo (1); Pu, Wei-Wei (1); Yao, Qing (2); Liu, Jing-Le (3); Wu, Jin (1); Zhang, Nan-Nan (1); Li, Zi-Ming (1); Ma, Zhi-Qiang (1) Author affiliation:(1) Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing; 100089, China; (2) Tianjin Environmental Meteorology Center, Tianjin; 300074, China; (3) Tianjin Meteorological Observation Center, Tianjin; 300074, China Corresponding author:Ma, Zhi-Qiang(zqma@ium.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5210-5219 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Real-time BTEX(including benzene, toluene, ethylbenzene, m-, p-, and o-xylenes)were measured continuously in Tianjin urban site in July 2019 and January 2020 using a Syntech Spectras GC955 analyzer. The BTEX concentration levels, composition, and evolutionary mechanisms during typical pollution episodes were investigated. The potential sources of BTEX were analyzed qualitatively using the diagnostic ratios method. Finally, the BTEX health risk was evaluated by using the human exposure analysis and evaluation method according to US EPA. The averaged total mixing ratio of BTEX were 1.32×10-9 and 4.83×10-9 during ozone pollution and haze episodes, respectively. Benzene was the most abundant species, followed by toluene. The mixing ratio of BTEX was largely affected by short southwestern distance transportation in January, while local emissions in July. In addition, the BTEX mixing ratio depended on the influence of temperature and relative humidity(RH)in July, while the concentration was more sensitive to changes in RH when the temperature was low in January. Diagnostic ratios and source implications suggested that the BTEX was affected mainly by biomass/biofuel/coal burning during haze episodes. The traffic related emissions also had an impact except for the influence of biomass/biofuel/coal burning in July. The averaged hazard quotient(HQ)values were 0.072 and 0.29 during ozone pollution and haze episodes, respectively, which were in the upper safety range limit recommended by the US EPA. The carcinogenic risk posed by benzene in both cleaning and pollution processes was higher than the safety threshold set by the US EPA, which should be monitored carefully.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Risk assessment Controlled terms:Benzene - Health risks - Mixing - Ozone - Safety engineering - Toluene - Urban growth Uncontrolled terms:BTEX - Coal-burning - Diagnostic ratios - Evolutionary mechanisms - Health risk assessments - Mixing ratios - Ozone pollution - Pollution episodes - Tianjin - Urban areas Classification code:403.1 Urban Planning and Development - 461.7 Health Care - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 914 Safety Engineering - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202104047 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239920 Title:Dynamic Evolution Characteristics of Water Resources Utilization Efficiency in China Under the Constraint of Triple Attribute Carrying Capacity Title of translation:三重属性的承载力约束下中国水资源利用效率动态演进特征分析 Authors:Zhang, Kai (1, 2); Wu, Feng-Ping (2); Cheng, Chang-Chun (2, 3) Author affiliation:(1) Business School, Jiangsu University of Technology, Changzhou; 213001, China; (2) Business School, Hohai University, Nanjing; 210098, China; (3) Insitute for Jiangsu Yangtze River Economic Belt, Nantong University, Nantong; 226019, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5757-5767 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the triple attribute constraints of "resource endowment, social economy, and ecological environment," this paper establishes the calculation model of water resource carrying capacity, creatively takes water resource carrying capacity as an input factor, constructs an SFA efficiency calculation model, and analyzes the dynamic evolution characteristics of water resource utilization efficiency by using panel data of 31 provinces in China from 2003 to 2017, using Kernel density estimation and Markov chain methods. The results show that: ① the water resources carrying capacity of most provinces in China was steadily increasing; Northwest China, North China, Northeast China, and central China were at a low level, and Southwest and South China were at a higher level; ② the water resources utilization efficiency of all provinces in China had maintained a stable growth, and the growth rate of the western region was larger than that of the central and eastern regions; ③ the dynamic evolution of China's water resources utilization efficiency had the phenomenon of multi-polarization and convergence, and some provinces had a gradient effect, which had club convergence characteristics, poor liquidity, and a prominent Matthew effect. In order to realize the coordination and coupling of water resources, society, and the environment; reduce the difference in utilization efficiency between regions; and improve the efficiency of water resources utilization, this paper provides suggestions to fully consider the water resource carrying capacity, coordinate the development strategy of water resource supply and demand in the whole country and region, and construct a water rights trading market.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Statistics Controlled terms:Commerce - Efficiency - Markov processes - Water resources Uncontrolled terms:Calculation models - Dynamic evolution - Efficiency calculations - Kernel Density Estimation - Resource capacity - SFA efficiency calculation model - Utilization efficiency - Water resource capacity - Water utilization - Water utilization efficiency - Waters resources Classification code:444 Water Resources - 913.1 Production Engineering - 922.1 Probability Theory - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202103171 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239914 Title:Spatial and Temporal Distribution of Ozone and Influencing Factors in Shandong Province Title of translation:山东省O3时空分布及影响因素分析 Authors:Zhang, Miao (1); Ding, Chun (2); Li, Yan (1); Wang, Gui-Xia (1); Lin, Jing-Jing (1); Meng, He (3); Xu, Yang (1) Author affiliation:(1) Shandong Provincial Eco-Environment Monitoring Center, Ji'nan; 250101, China; (2) Clear Science & Technology Co., Ltd., Beijing; 100029, China; (3) Qingdao Eco-Environment Monitoring Center of Shandong Province, Qingdao; 266003, China Corresponding author:Xu, Yang(xuyang8659@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5723-5735 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Surface ozone pollution has emerged as a severe problem in China during the past several years, especially in Shandong Province. This study analyzed the temporal and spatial distribution of ρ(surface ozone,O3) concentration in Shandong Province and its relationship with meteorological factors, such as air temperature, relative humidity, air pressure, wind direction, and wind speed. Concentrations of PM2.5 and air pollutants from 2015 to 2019 were collected from the national and provincial ambient air monitoring network. Meteorological data from April to September 2019 to 2020 were also collected from the meteorological representative stations. The results showed that the ozone pollution in Shandong Province became increasingly serious in recent years. The annual concentration growth rate of ρ(O3-8h) (90th percentile) and ρ(Ox) (sum of ozone and NO2) were 7.6 μg•(m3•a)-1 and 7.0 μg•(m3•a)-1, respectively. The annual concentrations of PM2.5 and ozone precursors (CO and NO2) were gradually decreasing, and those decreasing rates were smaller than the growth rate of annual ρ(O3-8h) (90th percentile). The variation pattern of monthly ρ(O3) concentrations were shown to be "M-type" or "inverted V-type". The monthly ρ(O3-8h)(90th percentile) was higher in summer and lower in winter. The monthly peaks in ρ(O3-8h)(90th percentile) were found in June and September. Moreover, the occurrence of ozone-polluted days was a trend in advance. The spatial distribution of ozone concentration in Shandong Province was characterized as higher in the inland cities and lower in the coastal cities, and there was a trend of regional uniformity. Correlation analysis results showed that the concentration of ρ(O3) in Shandong Province was positively correlated with the maximum daily temperature and negatively related to the relative humidity, air pressure, and wind speed. The daily maximum temperature and relative humidity were the main meteorological factors. Additionally, the impact of meteorological factors on O3 over the standard rate showed significant differences in different cities.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Ozone Controlled terms:Air pollution - Atmospheric pressure - Atmospheric temperature - Growth rate - Meteorology - Nitrogen oxides - Spatial distribution - Wind Uncontrolled terms:Air-pressure - Meteorological factors - Ozone (O3) - Ozone pollution - PM 2.5 - Pollution characteristic - Shandong province - Surface ozone - Temporal and spatial distribution - Wind speed Classification code:405.3 Surveying - 443.1 Atmospheric Properties - 451 Air Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 902.1 Engineering Graphics - 921 Mathematics Numerical data indexing:Mass 1.00E-09kg, Mass 7.00E-09kg, Mass 7.60E-09kg, Time 1.08E+04s to 2.88E+04s DOI:10.13227/j.hjkx.202102034 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239949 Title:Characteristics of Planktonic Bacteria Community Between Summer and Winter Surface Water in Dali Lake Title of translation:达里湖表层水体浮游细菌群落结构的夏-冬季节差异 Authors:Li, Wen-Bao (1); Guo, Xin (1); Zhang, Bo-Yao (1); Du, Lei (1); Tian, Ya-Nan (1) Author affiliation:(1) Inner Mongolia Key Laboratory of Water Resources Protection and Utilization, Inner Mongolia Agricultural University, Hohhot; 010018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5814-5825 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Lakes are usually influenced by the obvious seasonal changes that occur in cold and arid areas, in which they are nearly completely covered by ice during the winter but receive large amounts of precipitation and other exogenous inputs during the summer. In this study, we collected a total of 41 surface water and ice samples in July, 2018, and January, 2019, in Dali Lake, an inland closed lake located in the Inner Mongolia Plateau. Through 16S rRNA gene-based high throughput sequencing technology, coupled with comparisons of physicochemical proxies between summer and winter surface water samples, the seasonal characteristics of the planktonic bacterial community were analyzed in detail. First, the contents of total nitrogen (TN), total phosphorus (TP), dissolved inorganic phosphorus (DIP), dissolved total phosphorus (DTP), electrical conductivity (EC), and oxidation-reduction potential (ORP) were noticeably higher in summer surface water than those in winter surface water. The results revealed clear seasonal differences in the dominant planktonic bacterial phyla that had a relative content greater than 1%. For example, Proteobacteria, Actinobacteria, and Cyanobacteria were the most dominant phyla in both summer and winter samples. However, Deinococcus-Thermus and Tenericutes were two of the dominant planktonic bacterial phyla that were only present in summer surface water, whereas Gemmatimonadetes was one of the dominant planktonic bacterial phyla present only in winter surface water. Further, the structure of the planktonic bacteria also varied based on the changing of dominant operational taxonomic units (OTUs). Second, the different environmental conditions between winter and summer, especially the exchange process between "ice" and "water," not only caused obvious differences in the eutrophication of surface water but also led to different responses of the dominant bacteria phyla to the content changes in P, EC, DO, COD, ice thickness, etc. For example, the TSI (TP) proxy had higher correlations with changes in the contents of Proteobacteria, Actinobacteria, and Cyanobacteria in ice samples than those in winter and summer surface water samples. Finally, by coupling these findings with the results of sample clustering and typing, we concluded that the dominant bacteria were mainly affected by changes in the internal environment (such as the migration of different P forms, ice thickness, etc.) caused by the freezing process in ice samples. However, the dominant bacteria were mainly affected by changes in the external environment (such as depth, TDS, etc.) in winter and summer water samples.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Bacteria Controlled terms:Chemical oxygen demand - Dissolved oxygen - Eutrophication - Lakes - Phosphorus - Redox reactions - RNA Uncontrolled terms:Bacteria community - Dali lakes - Electrical conductivity - Ice samples - Physical and chemical proxy - Planktonic bacteria - Proteobacteria - Seasonal rotation - Total phosphorus - Water samples Classification code:461.2 Biological Materials and Tissue Engineering - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Percentage 1.00E00% DOI:10.13227/j.hjkx.202103189 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239968 Title:Volatile Organic Compounds in the Vehicle Repairing Industry of China: Emission, Management, Purification, and Policy Title of translation:汽修行业挥发性有机物排放与控制现状及对策 Authors:Wang, Hai-Lin (1, 2); Yang, Tao (1, 2); Nie, Lei (1, 2); Fang, Li (1, 2); Zhang, Zhong-Shen (3); Hao, Zheng-Ping (3) Author affiliation:(1) Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Beijing; 100037, China; (3) National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing; 101408, China Corresponding authors:Fang, Li(fangli@cee.cn); Fang, Li(fangli@cee.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5574-5584 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
With regards to the prevention and control of volatile organic compounds (VOCs), the living sources, including the auto repair industry, will become increasingly important after industrial sources of VOCs are under effective control. This study first introduced the pollution status of the auto repair industry in China, which includes the detailed components and pollution levels as well as the emissions of the overall VOCs in the auto repair industry (9.1×105 t) based on the field investigation and tests carried out in Beijing. Secondly, the current situation of VOCs treatments in the auto repair industry was analyzed. For the pretreatment of paint mist, the combined dry filter was the most effective. At present, the current treatments of VOCs include plasma, UV oxidation, activated carbon adsorption, etc. The ratio of activated carbon adsorption in some provinces and cities was greater than 50%; however, the removal efficiency was generally low due to the untimely replacement. Thirdly, the VOCs content limits of automobile repair paints at home and abroad and the emission standards of the automobile repair industry were systematically discussed, indicating that the VOCs content limits of primers and topcoats in China were much lower than those in other countries. Beijing, Jiangsu, and Shanghai had the most stringent VOCs emissions standards (20 mg•m-3) of the automobile repair industry. Finally, the treatment route-line of VOCs in the auto repair industry was proposed. For large-scale repair enterprises or treatments on a regional scale, the combined "surface paint water-based substitution+centralized spray center+molecular sieve concentration-catalytic combustion" procedure should be implemented. For the small and scattered treatments, "surface paint water-based substitution+activated carbon adsorption-shared catalytic combustion" might be adapted.
© 2021, Science Press. All right reserved. Number of references:70 Main heading:Volatile organic compounds Controlled terms:Adsorption - Automobiles - Automotive industry - Catalysis - Combustion - Gas chromatography - Molecular sieves - Paint - Pollution - Repair Uncontrolled terms:Activated carbon adsorption - Auto repair - Automobile repair - Catalytic combustion - Emission characteristics - Emission standard - Pollution prevention - Repair industry - Treatment technologies - Water based Classification code:662.1 Automobiles - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 813.2 Coating Materials - 913.5 Maintenance Numerical data indexing:Mass 2.00E-05kg, Percentage 5.00E+01% DOI:10.13227/j.hjkx.202106152 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239863 Title:Development of an Emission Model for Oxygenated Volatile Organic Compounds from Gasoline Vehicles Based on the Online Measurement Title of translation:基于高分辨率在线测量的轻型汽油车含氧挥发性有机物排放模型构建 Authors:Hao, Yu-Qi (1); Yuan, Zi-Bing (1); Wang, Meng-Lei (1); Sha, Qing-E (2); Du, Xin-Yue (1); Liu, Yuan-Xiang (1); Liu, Xue-Hui (1); Duan, Le-Jun (1); Yuan, Bin (2); Zheng, Jun-Yu (2); Shao, Min (2); Yan, Yu (3) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Institute for Environment and Climate Research, Jinan University, Guangzhou; 511443, China; (3) Palmary Technology Co., Ltd., Beijing; 100071, China Corresponding author:Yuan, Zi-Bing(zibing@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5747-5756 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The oxygenated volatile organic compounds (OVOCs) emitted by motor vehicles have high atmospheric reactivity; however, research on the identification of their high-resolution emission characteristics using online measurements is still in its infancy, and there is a lack of model tools to calculate and predict the OVOC emissions. In this study, eight OVOC species including formaldehyde, acetone, and ethanol were measured by PTR-TOF-MS and IMR-MS under the simple transient test conditions. The results showed that the OVOC species were significantly affected by the change in working conditions. Compared with that of the idling stage, the emission peak of OVOCs increased by 183%, 105%, 56%, 92%, and 244%. Meanwhile, with the upgrading of the emission standard from national Ⅰ to national Ⅴ, the emissions of formaldehyde, acetone, and methanol decreased by 90.9%, 93.3%, and 93.7%, respectively. By contrast, the emission of ethanol was stable. From national Ⅰ to national Ⅴ, the total emission factors of the eight species were 12.5, 10.2, 5.4, 4.2, and 1.6 mg•km-1, and the overall emission reduction was 87%. It was found that the emission rate of OVOCs was closely related to the vehicle specific power (VSP), whereas the emission factor was closely related to the modified combustion efficiency (MCE). The first-order linear functional relationships were established by fitting the VSP and emission rate as well as the MCE and the mileage-based emission factor (EFs). The concept of modified combustion loss (MCL) was proposed, and the simplified proportional functional relationship between MCL and EFs was established, thus clarifying the decisive factor of the OVOC emission factor. The OVOC emission model based on VSP and MCL can calculate and predict the emission rates and emission factors of light-duty gasoline vehicles under different hot running conditions so as to provide an effective tool for accurately evaluating OVOC emission contributions and establishing an emission inventory.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Combustion Controlled terms:Acetone - Emission control - Ethanol - Formaldehyde - Vehicles - Volatile organic compounds Uncontrolled terms:Combustion efficiencies - Compound species - Emission factors - Emission model - Emissions rates - Modified combustion loss - On-line measurement - Oxygenated volatile organic compound - Vehicle specific power - Volatile organic compound emission Classification code:451.2 Air Pollution Control - 804.1 Organic Compounds Numerical data indexing:Mass 1.60E-06kg, Percentage 1.05E+02%, Percentage 1.83E+02%, Percentage 2.44E+02%, Percentage 5.60E+01%, Percentage 8.70E+01%, Percentage 9.09E+01%, Percentage 9.20E+01%, Percentage 9.33E+01%, Percentage 9.37E+01% DOI:10.13227/j.hjkx.202104352 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779876 Title:Hydrochemical Characteristics and Factors of Surface Water and Groundwater in the Upper Yongding River Basin Title of translation:永定河上游地表水-地下水水化学特征及其成因分析 Authors:Kong, Xiao-Le (1); Yang, Yong-Hui (1); Cao, Bo (1, 2); Wang, Yi-Xuan (1, 2); Pei, Hong-Wei (3); Shen, Yan-Jun (1) Author affiliation:(1) Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Agricultural Water-Saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang; 050021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Municipal and Environmental Engineering, Hebei University of Architecture, Zhangjiakou; 075000, China Corresponding author:Shen, Yan-Jun(shenyanjun@sjziam.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4202-4210 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The Yongding River basin is an important water conservation and ecological barrier area in the Northwest of Hebei Province. Reduced runoff and deterioration of the water environment in this area have become increasingly prominent under the effects of climate change and intensive human activities. Clarifying the chemical characteristics and factors of surface water and groundwater in the upper Yongding River basin can provide data and support for the sustainable use of water resources. Stable isotopes of hydrogen and oxygen (δ2H and δ18O) were used to study the sources of surface water and groundwater. Mathematical statistics and hydrogeochemical methods were then used to analyze the regional hydrogeochemical processes and factors of surface water and groundwater. The results showed that precipitation was the main source of surface water and groundwater. Under the effects of natural factors and human activities, the Yang River and Sanggan River basins exhibited significant differences in surface water chemistry. The sub-basins were ranked by ion concentration as follows: Sanggan River> Yang River. The main cation and anions of the Sanggan River basin were Na+, Cl-, and SO42-, while in the Yang River basin, Ca2+ and HCO3- were the most common. The water chemistry of the Sanggan River exhibited greater variation than that of the Yang River. Surface water chemistry were mainly controlled by mineral dissolution and evaporation, but human activities were reflected in different sub-basins. Surface water in the Sanggan River basin was affected by industrial wastewater discharge, while that of the Yang River basin was affected by agricultural production and cities. However, the continuous increase of Cl- and SO42- concentrations, caused by industrial wastewater discharge and acid rain, was the limiting factor for sustainable use of surface water resources. In future, surface water in Sanggan River basin should be used with consideration to the effects of both total salinity and chemical composition of the water, while in Yang River, a focus should be placed on total salinity. The use of surface water resources in accordance with local conditions is an effective measure for the sustainable use of water resources and the restoration of groundwater levels in this region.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Surface water resources Controlled terms:Acid rain - Agricultural robots - Agriculture - Climate change - Deterioration - Groundwater - Groundwater resources - Hydrochemistry - Rivers - Statistics - Water conservation - Watersheds Uncontrolled terms:Agricultural productions - Chemical characteristic - Hydrochemical characteristics - Hydrogeochemical methods - Hydrogeochemical process - Industrial wastewater discharges - Surface water and groundwaters - Surface-water chemistry Classification code:443.1 Atmospheric Properties - 444 Water Resources - 451.1 Air Pollution Sources - 481.2 Geochemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 922.2 Mathematical Statistics - 951 Materials Science DOI:10.13227/j.hjkx.202012227 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945130 Title:Spatiotemporal Variations in Atmospheric Urban Heat Island Effects and Their Driving Factors in 84 Major Chinese Cities Title of translation:中国84个主要城市大气热岛效应的时空变化特征及影响因子 Authors:Li, Yu (1); Zhou, De-Cheng (1); Z.-M., Yan Author affiliation:(1) School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Zhou, De-Cheng(zhoudc@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:5037-5045 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Accelerating urbanization seriously intensifies urban heat island effects in China, which in turn affects regional environment and human health. However, the spatiotemporal patterns of atmospheric urban heat island effects remain poorly understood in China as previous research is mostly based on satellite-sensed radiation temperatures. Using long-term daily meteorological observations from 1960 to 2017, this study explored the geographical distribution of atmospheric urban heat islands over diurnal, intra-annual, and inter-annual timescales in 84 major cities in China. The results show that on average, the intensity of the urban heat island reaches(0.9±1.1)℃, although large geographical variations were detected. The intensity was, overall, larger in northern China than in southern China; North China showed the largest annual intensity of(1.4±1.4)℃, and seasonal intensity variations were high in northeast and northwest China. Here, significantly higher intensity effects were measured at night [(1.2±1.1)℃] than during the day [(0.5±1.2)℃], and in summer than winter during the day, and in winter than summer during the night. Inter-annually, the annual mean urban heat island effect has increased by an average of 0.040℃ per decade, although this trend weakens after 2009. Furthermore, we found that the spatial patterns of atmospheric heat island intensity was greatly affected by climatic background conditions and the location of meteorological stations, while the long-term trends were strongly influenced by the impervious surface area. This study improves understanding of the atmospheric urban heat island effect in China and provides important insights for formulating urban land-use strategies to alleviate high temperatures and heatwaves.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Atmospheric temperature Controlled terms:Geographical distribution - Land use - Landforms - Radiation effects Uncontrolled terms:Chinese cities - Driving factors - Human health - Impact factor - Regional environments - Spatial and temporal patterns - Spatio-temporal variation - Urban heat island - Urban Heat Island Effects - Urbanization Classification code:403 Urban and Regional Planning and Development - 405.3 Surveying - 443.1 Atmospheric Properties - 481.1 Geology - 902.1 Engineering Graphics DOI:10.13227/j.hjkx.202102003 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945221 Title:Characteristics of O3 Pollution and Key Precursors in Chengdu During Spring Title of translation:成都市春季O3污染特征及关键前体物识别 Authors:Han, Li (1); Chen, Jun-Hui (1, 2); Jiang, Tao (1); Xu, Chen-Xi (1); Li, Ying-Jie (1); Wang, Cheng-Hui (1); Wang, Bo (1); Qian, Jun (1); Liu, Zheng (1) Author affiliation:(1) Sichuan Academy of Environmental Sciences, Chengdu; 610041, China; (2) School of Environment, Tsinghua University, Beijing; 100084, China Corresponding authors:Chen, Jun-Hui(9503062@qq.com); Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4611-4620 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To study the characteristics of O3 pollution and identify the key precursors for O3 formation in Chengdu in spring, O3 concentrations in April between 2016 and 2018 were analyzed, and on-line measurements of O3 and the precursors(VOCs and NOx)were also studied at an urban site. The results showed that the O3 pollution level in April increased year by year, and diurnal variations showed a unimodal distribution. When the ambient temperature was more than 20℃, the wind speed was between 1 and 1.5 m•s-1, and the relative humidity was less than 65%, the probability of O3 pollution occurring in April was more than 80%. In April 2018, the average concentrations of NOx and VOCs during O3 pollution days were 2.3-times and 2-times higher than non-pollution days. Furthermore, an OBM method was used to calculate the RIR values of different ozone precursors. This showed that the RIR values of anthropogenic VOCs, CO, biogenic VOCs, and NOx for ozone were 2.4, 0.87, 0.06, and -2.6, respectively, indicating that O3 formation in Chengdu was generally VOC-limited. The RIR values of the VOC species showed that m/p-xylene, ethylene, trans-2-butane, propylene, o-xylene, toluene, acetone, isoprene, isopentane, and n-butane were the key active VOC species of ozone formation.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Ozone Controlled terms:Acetone - Air pollution - Ethylene - Nitrogen oxides - Urban growth - Wind Uncontrolled terms:Chengdu - Key precursor - Measurements of - NO x - On-line measurement - Ozone(O3) - Pollution characteristic - Pollution level - Relative incremental reactivity - Urban site Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 451 Air Pollution - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Percentage 6.50E+01%, Percentage 8.00E+01%, Size 1.00E00m to 1.50E+00m DOI:10.13227/j.hjkx.202012312 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945544 Title:Long-term Changes and Drivers of Ecological Security in Shahe Reservoir, China Title of translation:天目湖沙河水库水生态安全状况长期变化及影响因素 Authors:Yang, Wen-Bin (1); Duan, Wen-Xiu (1, 2); Cui, Yang (3); Zhu, Guang-Wei (2); Wu, Tian-Hao (2); Xu, Hai (2); Zhu, Meng-Yuan (2) Author affiliation:(1) School of Ecology and Environment, Anhui Normal University, Wuhu; 241002, China; (2) State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Northeast Electric Power Design Institute Co., Ltd., of China Power Engineering Consulting Group, Changchun; 130021, China Corresponding author:Zhu, Guang-Wei(gwzhu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4739-4752 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Monthly datasets of ecological indicators from 2010 to 2020 in Shahe Reservoir, Tianmuhu, China, were examined to reveal the long-term variations in water ecological security and its driving factors. The results of Secchi disk depth(SD)measurements revealed significantly spatial variation(P< 0.05)within the reservoir. The highest SD was recorded in the downstream-linked reservoir, and the lowest SD was recorded in the upstream tributaries. In contrast, the values of other water ecological indicators were higher in the upstream tributaries than in the transition region and the downstream-linked reservoir area. In summer and autumn, the SD was low, while the concentrations of total phosphorous(TP), chlorophyll a(Chl-a), the permanganate index, and cyanobacterial biomass(BMc)were high. During the thermal stratification period from May to September, the concentrations of 2-methylisoborneol(MIB)and Chl-a were highest at a depth of 4 m, while diatom biomass(BMb)and BMc reached their maximum at depths of 2 m and 0.5 m, respectively. Therefore, spatial and temporal variations should be fully considered when evaluating aquatic ecological security. Focusing on spring and summer, when the risk of water ecological security was high, Chl-a combined with SD and MIB along with their correlation with other water quality indexes, was used to evaluate and optimize the ecological security of Shahe Reservoir. The evaluation results showed that the aquatic ecological security of the reservoir was excellent over the last 10 years; however, annual fluctuations have been large and the evaluation scores were spatially variable. While seasonal sampling strategies focusing on three layers depths are economical and reliable for lake regions with thermal stratification, our results indicate that tailored monitoring may be required to determine the aquatic ecological security of lakes and reservoirs. In Shahe Reservoir, the decrease in the SD and the increase in MIB caused by high TP and algal blooms were the most important drivers of ecological service function in the reservoir. Furthermore, hydrometeorological factors may also play important roles in the aquatic ecological security of reservoirs.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:Reservoirs (water) Controlled terms:Chlorophyll - Ecology - Lakes - Potable water - Quality control - Rivers - Thermal stratification - Water quality Uncontrolled terms:2-methylisoborneol - Aquatic ecology - Chlorophyll a - Down-stream - Drinking water sources - Ecological indicators - Ecological security - Long-term changes - Safety evaluations - Total phosphorous Classification code:441.2 Reservoirs - 444 Water Resources - 445.2 Water Analysis - 454.3 Ecology and Ecosystems - 804.1 Organic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Age 1.00E+01yr, Size 2.00E+00m, Size 4.00E+00m, Size 5.00E-01m, Size 5.1054E+01m to 5.1308E+01m DOI:10.13227/j.hjkx.202101125 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065977 Title:Dynamic Mechanisms of Groundwater Quality by Residual Contaminants of the Tanghe Wastewater Reservoir in Xiong'an New Area Title of translation:雄安新区唐河污水库残留污染物对地下水水化学动态的作用机制 Authors:Zhang, Zhi-Xiong (1, 2); Wang, Shi-Qin (1); Zhang, Yi-Zhang (3, 4); Feng, Wen-Zhao (1, 2) Author affiliation:(1) Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Agricultural Water-saving, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang; 050022, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (4) Chinese Research Academy of Environmental Sciences Tianjin Branch, Tianjin; 300450, China Corresponding authors:Wang, Shi-Qin(sqwang@sjziam.ac.cn); Zhang, Yi-Zhang(zhangyizhang8102@163.com); Zhang, Yi-Zhang(zhangyizhang8102@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5312-5321 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Tanghe wastewater reservoir(TWR)is located on the west side of Baiyangdian Lake in Xiong'an New Area, where sewage infiltration and irrigation has been taking place for 40 years, and a large number of contaminants have accumulated in the unsaturated zone. Identifying the mechanisms by which this combined system contributes to groundwater hydrochemical dynamics is important for the protection of the water environment in the area. Hydrogeochemical methods such as tracing and improved chlor-alkali index are used to analyze the spatial and temporal characteristics and evolution mechanisms of shallow groundwater. The study shows that the groundwater chemistry in the sewage reservoir area is SO4•HCO3-Na type, with an average sewage fraction of 48.4%, and the contribution of Na+ from ion exchange and halite dissolution is 29.9% and 8.6%, respectively. The chemical type of groundwater in the sewage irrigation area is SO4•HCO3-Na•Mg, the average sewage fraction is 58.3%, and Na+ consumption of ion exchange is 8.1%. The mix dilution of precipitation and irrigation leads to a reduction in the effluent fraction and saturation index in the groundwater, and promotes the adsorption of Na+ from groundwater into the soil. Denitrification in aquifers can effectively reduce groundwater nitrate pollution. In addition, the sewage fraction before and after the restoration of the reservoir was 61.5% and 49.3%, respectively. Pollutants retained in the sewage infiltration and irrigation combined system will continue to affect the quality of shallow groundwater with varying degrees of mixing and water-rock interaction driven by rainfall and irrigation.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Sewage Controlled terms:Aquifers - Effluents - Groundwater pollution - Groundwater resources - Hydrochemistry - Hydrogeology - Infiltration - Ion exchange - Irrigation - Reservoirs (water) - Sodium chloride Uncontrolled terms:Baiyangdian watershed - Combined system - Dynamic mechanism - Groundwater quality - Hydro geochemistries - Sewage infiltration - Sewage irrigation - Shallow groundwater - Tanghe wastewater reservoir - Xiong'an new area Classification code:441.2 Reservoirs - 444.2 Groundwater - 452.1 Sewage - 452.3 Industrial Wastes - 453.1 Water Pollution Sources - 481.1 Geology - 481.2 Geochemistry - 802.2 Chemical Reactions - 821.3 Agricultural Methods Numerical data indexing:Age 4.00E+01yr, Percentage 2.99E+01%, Percentage 4.84E+01%, Percentage 4.93E+01%, Percentage 5.83E+01%, Percentage 6.15E+01%, Percentage 8.10E+00%, Percentage 8.60E+00% DOI:10.13227/j.hjkx.202103179 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065985 Title:Distribution Characteristics and Risk Assessment of Antibiotics and Polycyclic Aromatic Hydrocarbons in the Sediments of Desilting Demonstration Area in Baiyangdian Lake Title of translation:白洋淀清淤示范区沉积物中抗生素和多环芳烃的分布特征与风险评估 Authors:Wang, Tong-Fei (1); Zhang, Wei-Jun (2); Li, Li-Qing (2); Zhang, Mei-Yi (3); Liao, Gui-Ying (1); Wang, Dong-Sheng (2, 3) Author affiliation:(1) Faculty of Materials Science and Chemistry, China University of Geosciences(Wuhan), Wuhan; 430074, China; (2) School of Environment Studies, China University of Geosciences(Wuhan), Wuhan; 430074, China; (3) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding authors:Liao, Gui-Ying(liaogy@cug.edu.cn); Wang, Dong-Sheng(wgds@rcees.ac.cn); Wang, Dong-Sheng(wgds@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5303-5311 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A total of 22 antibiotics and 16 polycyclic aromatic hydrocarbons(PAHs)in sediments before and after desilting in typical areas(fish ponds and open water)of Baiyangdian Lake were analyzed using HPLC-MS/MS and GC/MS(high performance liquid chromatography and gas chromatography coupled with mass spectrometry), to evaluate their potentially risks to the ecological environment. The results showed that the contents of 22 antibiotics in Baiyangdian Lake sediments ranged from 0 to 52.89 ng•g-1, in which the quinolones content was the highest. After dredging treatment, the average content of antibiotics in Nanliuzhuang open water area decreased from 46.25 ng•g-1 to 9 ng•g-1(80.54% reduction), while the average content of antibiotic(19.07 ng•g-1)in Caiputai remained relatively stable. Therefore, the dredging treatment performed better in removing antibiotics from Naliuzhuang area. The total contents of 16 PAHs in sediments ranged from 23.79 ng•g-1 to 329.40 ng•g-1, in which Naphthalene was the highest(242.02 ng•g-1), while Fluoranthene was the lowest. The average content of PAHs in sediments in Nanliuzhuang decreased from 117.45 ng•g-1 to 50.49 ng•g-1 after dredging, while PAHs in Caiputai(57.98 ng•g-1)remained stable; the 57.01% reduction in PAHs in Nanliuzhuang open water indicated that dredging treatment exhibited stronger effects on PAHs variations in Nanliuzhuang compared to that of Caiputai. In addition, the ecological risk assessment showed that the risk of Enrofloxacin and Norfloxacin was high in area S2 of Nanliuzhuang open water, while PAHs exhibited relatively low ecological risk, in which the Naphthalene in area S1 of Fuhe river posed medium ecological risk while the remaining produced low ecological risks. The results indicated that quinolone antibiotics in sediments of the un-dredged area of Baiyangdian Lake should be monitored due to its higher ecological risk.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Risk assessment Controlled terms:Antibiotics - Aromatization - Gas chromatography - High performance liquid chromatography - Lake pollution - Lakes - Mass spectrometry - Mineral oils - Naphthalene - Polycyclic aromatic hydrocarbons - Sediments Uncontrolled terms:% reductions - Baiyangdian lakes - Desilting assessment - Distribution characteristics - Ecological risks - High-performance liquid chromatography - HPLC-MS-MS - Open water - Pond water - Risks assessments Classification code:453 Water Pollution - 461.6 Medicine and Pharmacology - 483 Soil Mechanics and Foundations - 513.3 Petroleum Products - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass 0.00E00kg to 5.289E-11kg, Mass 1.00E-12kg to 3.294E-10kg, Mass 1.00E-12kg to 5.049E-11kg, Mass 1.00E-12kg to 9.00E-12kg, Mass 1.1745E-10kg, Mass 1.907E-11kg, Mass 2.379E-11kg, Mass 2.4202E-10kg, Mass 4.625E-11kg, Mass 5.798E-11kg, Percentage 5.701E+01%, Percentage 8.054E+01% DOI:10.13227/j.hjkx.202103061 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779595 Title:Application Effect of Four Typical Submerged Macrophytes on Removing Cadmium from Polluted Sediment Title of translation:4种典型沉水植物对去除镉污染底泥的应用效果 Authors:Tao, Li (1, 2); Wang, Pei-Fang (1, 2); Yuan, Qiu-Sheng (1, 2); Wang, Xun (1, 2); Hu, Bin (1, 2) Author affiliation:(1) College of Environment, Hohai University, Nanjing; 210098, China; (2) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China Corresponding author:Wang, Pei-Fang(pfwang2005@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4311-4318 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, four typical submerged macrophytes, namely Hydrilla verticillata, Elodea canadensis, Potamogeton crispus, and Ceratophyllum demersum, were tested for their chlorophyll content and antioxidant enzyme activity, to analyze their cadmium tolerance. The biota-sediment accumulation factor (BSAF) and plant transport factor (TF) were utilized to understand the accumulation capacity of the plants. Finally, the distribution of cadmium in submerged macrophytes was revealed through phytohistochemical methods, to provide theoretical support for the practical application of submerged macrophytes. The results showed that three of the plants, excluding C. demersum, exhibited varying tolerances to cadmium pollution in sediments, among which the tolerance of H. verticillata and E. canadensis were the strongest. P. crispus had the strongest accumulation capacity (BSAF was 2.32) at relatively low pollution levels (≤20 mg•kg-1). In this study, because of its weak root system, the BSAF of C. demersum was less than 1.0, indicating that macrophyte roots play an important role in phytoremediation of Cd-contaminated sediments. Comparing the TF of different plants, it can be found that the roots of H. verticillata had the strongest above-ground cadmium transport capacity, while P. crispus mainly accumulated cadmium in its roots. At the same time, when the cadmium concentration was 50 mg•kg-1, cadmium was found to be evenly distributed in the stem organelles of P. crispus, in contrast to the other plants. Based on the cadmium tolerance and accumulation mechanism of the plants, and in consideration of real-world factors, H. verticillata and P. crispus were selected as ideal plants for repairing cadmium-containing sediments. Meanwhile, based on the different transport capabilities of plants, it is recommended that only the above-ground part of H. verticillate should be removed, while P. crispus should be uprooted regularly.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Cadmium Controlled terms:Bioremediation - Enzyme activity - Plants (botany) - Sediments Uncontrolled terms:Accumulation mechanisms - Antioxidant enzyme activity - Biota-sediment accumulation factors - Ceratophyllum demersum - Chlorophyll contents - Contaminated sediment - Submerged macrophytes - Transport capabilities Classification code:454.2 Environmental Impact and Protection - 461.9 Biology - 483 Soil Mechanics and Foundations - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals DOI:10.13227/j.hjkx.202012300 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239927 Title:Characteristics and Source Apportionment of Atmospheric SVOCs Around Typical Chemical Industry Zones Title of translation:典型化工集中区环境空气SVOCs污染特征及来源解析 Authors:Ge, Xiang (1); Wu, Jian (1); Gao, Song (2); Feng, Jia-Liang (1); Chen, Jun-Wei (1); Zhang, Shu-Wei (1); Jiao, Zheng (1) Author affiliation:(1) School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China; (2) Shanghai Environmental Monitoring Center, Shanghai; 200235, China Corresponding authors:Gao, Song(njulegao@163.com); Jiao, Zheng(zjiao@shu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5663-5672 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, sampling points were set up around three typical petrochemical and chemical industry zones in East China during winter and spring. Atmospheric samples were collected using a PUF passive sampler, and the atmospheric semi-volatile organic compounds (SVOCs) were analyzed and measured using a gas chromatography-mass spectrometer (GC-MS). The concentrations of 59 types of SVOCs were obtained, including 25 types of polycyclic aromatic hydrocarbons (PAHs), 24 types of n-alkanes, and 10 types of hopanes. Principal component analysis (PCA) and diagnostic ratios were used to analyze the sources of PAHs. The results showed that the contribution rate of n-alkanes was the highest at each sampling point, followed by PAHs, which exceeded 60% and 30%, respectively. According to the variation in the concentration of each organic compound in winter and spring and the analysis of wind direction, it is assumed that n-alkanes C18, C29αβ-hopane, and C30αβ-hopane are related to the petrochemical emissions. PAH monomers were composed of phenanthrene (Phe), fluoranthene (Fla), naphthalene (Nap), fluorene (Flu), and pyrene (Pyr) as the main components, accounting for up to 90.0% in total. The PCA showed that the PAHs at the sampling points were mainly from fossil fuel combustion, motor vehicle exhaust, and petrochemical process emissions, and the contribution rates of the three sources to PAHs were 56.0%, 19.2%, and 8.6%, respectively. The above results were verified by the analysis of PAH sources based on diagnostic ratios.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Volatile organic compounds Controlled terms:Atmospheric chemistry - Chemical industry - Fossil fuels - Gas chromatography - Naphthalene - Paraffins - Petrochemical plants - Polycyclic aromatic hydrocarbons - Principal component analysis Uncontrolled terms:Contribution rate - Diagnostic ratios - Hopanes - n-Alkanes - Petrochemical and chemical industry zone - Principal component analyse - Principal-component analysis - Sampling points - Semi-volatile organic compound - Source analysis Classification code:443.1 Atmospheric Properties - 801.1 Chemistry, General - 802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 804.1 Organic Compounds - 805 Chemical Engineering, General - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.92E+01%, Percentage 3.00E+01%, Percentage 5.60E+01%, Percentage 6.00E+01%, Percentage 8.60E+00%, Percentage 9.00E+01% DOI:10.13227/j.hjkx.202102060 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239907 Title:Analysis of Air Quality and Influencing Factors in Sichuan Basin During the COVID-19 Outbreak Title of translation:新冠疫情期间四川盆地空气质量及影响因素分析 Authors:Chen, Jun-Hui (1, 2); Feng, Xiao-Qiong (2, 3); Li, Yuan (2); Wang, Shu-Xiao (1) Author affiliation:(1) School of Environment, Tsinghua University, Beijing; 100084, China; (2) Sichuan Academy of Environmental Sciences, Chengdu; 610041, China; (3) Sichuan Province Environmental Protection Technology Engineering Co., Ltd., Chengdu; 610041, China Corresponding authors:Feng, Xiao-Qiong(475269341@qq.com); Feng, Xiao-Qiong(475269341@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5594-5601 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the pollution emission survey and the observation data of air quality and component stations, the WRF/SMOKE/CMAQ model system was adopted to analyze the impact of pollution sources and changes in meteorological conditions on air quality during the COVID-19 outbreak. The results showed that during the COVID-19 outbreak in 2020, in addition to the year-on-year increase in ρ(O3) in the Sichuan Basin, ρ(SO2), ρ(NO2), ρ(CO), ρ(PM2.5), and ρ(PM10) all decreased year-on-year, with decreases ranging from 8% to 41%. Compared with levels from the same period in 2019, ρ(Cl-), ρ(K+), ρ(Si), ρ(Al), ρ(Ca), and ρ(EC) in Chengdu decreased year-on-year, indicating that the emission reduction of construction sites, motor vehicles, industrial coal burned, and biomass combustion were the main reasons for the decrease in PM2.5 concentration. During the COVID-19 outbreak, the SO2, NOx, PM10, PM2.5, and VOCs industrial emissions decreased by 32%, 31%, 40%, 39%, and 41%, respectively. The traffic volume of motor vehicles in Chengdu was only 40.3% of that during the normal period, and the speed of traffic increased by 19.7%. The daily emissions of NOx, VOCs, and CO were reduced by 44.7%, 49.6%, and 38.0%, respectively. The non-equal decrease in pollutants made the atmospheric oxidability contributed by motor vehicle emissions relatively further enhanced. The unfavorable weather conditions in the Sichuan Basin caused ρ(PM2.5), ρ(NO2), ρ(SO2), ρ(O3), and ρ(PM10) to rise by 2%, 4%, 23%, 6%, and 8%, respectively. After deducting the influence of changes in weather conditions, the concentrations of ρ(PM2.5), ρ(NO2), ρ(SO2), and PM10 decreased by 21%, 45%, 31%, and 30%, respectively, and ρ(O3) increased by 12%.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Air quality Controlled terms:Coal combustion - Emission control - Gas emissions - Nitrogen oxides - Vehicles Uncontrolled terms:Chengdu - COVID-19 - Motor vehicle - NO x - PM 10 - PM 2.5 - Pollutants emissions - Pollution emissions - Sichuan Basin - Weather influence Classification code:451.2 Air Pollution Control - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.20E+01%, Percentage 1.97E+01%, Percentage 2.00E+00%, Percentage 2.10E+01%, Percentage 2.30E+01%, Percentage 3.00E+01%, Percentage 3.10E+01%, Percentage 3.20E+01%, Percentage 3.80E+01%, Percentage 3.90E+01%, Percentage 4.00E+00%, Percentage 4.00E+01%, Percentage 4.03E+01%, Percentage 4.10E+01%, Percentage 4.47E+01%, Percentage 4.50E+01%, Percentage 4.96E+01%, Percentage 6.00E+00%, Percentage 8.00E+00% to 4.10E+01%, Percentage 8.00E+00% DOI:10.13227/j.hjkx.202102113 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239982 Title:Microbial Degradation Potential and Transformation Pathway of Micropollutants in Sand Filters of Drinking Water Treatment Plants Title of translation:饮用水砂滤池中微生物对微量污染物的降解潜力与途径 Authors:Zhou, Jie (1, 2); Wang, Dong-Lin (1, 2); Lin, Hui (1, 2); Bai, Yao-Hui (2) Author affiliation:(1) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Bai, Yao-Hui(yhbai@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5905-5911 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Sand filters have been widely used in drinking water treatments. Previous studies have demonstrated that sand filters can degrade some micropollutants. However, the degradation pathway and associated microorganisms have not been clearly investigated. Accordingly, in this study, the quartz sands and manganese sands from two drinking water treatment plants were sampled, and their biodegradation genes for four micropollutants (atrazine, atenolol, sulfadiazine, and carbamazepine) and associated microbial strains were analyzed. Metagenomic results showed that the bacterial strains affiliated with Hyphomicrobiaceae in the manganese sand filter and Pseudomonas strains in the quartz sand filter can transform the atrazine into atrazine-2-hydroxy; atenolamide hydrolase of some microorganisms in the two sand filters can transform atenolol into atenolol acid; and monooxygenase, dioxygenase and cytochrome P450, which can oxidize atrazine, sulfadiazine, and carbamazepine, were widely present in the two sand filters. The study further confirmed the biodegradation pathways of these four micropollutants according to the measurements of transformation intermediates in the cultivation experiment. Finally, the study analyzed the biodegradation genes in the other nine sand filters of drinking water treatment plants and found that abundant amidohydrolase, oxygenase, and cytochrome P450 were present in all sand filters, indicating that sand filters have the potential to biodegrade a number of micropollutants.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Biodegradation Controlled terms:Amides - Genes - Herbicides - Microorganisms - Potable water - Quartz - Sand - Wastewater treatment - Water treatment plants Uncontrolled terms:Atenolol - Biodegradation pathways - Carbamazepine - Cytochromes P450 - Drinking water treatment plants - Metagenomics - Microbial communities - Micropollutants - Quartz sand - Sand filter Classification code:444 Water Resources - 445.1 Water Treatment Techniques - 452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 461.8 Biotechnology - 461.9 Biology - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202104043 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239970 Title:Chemical Characteristics and Contaminant Sensitivity During the Typical Ozone Pollution Processes of Chengdu in 2020 Title of translation:2020年成都市典型臭氧污染过程特征及敏感性 Authors:Qian, Jun (1); Xu, Chen-Xi (1, 2); Chen, Jun-Hui (1, 3); Jiang, Tao (1); Han, Li (1); Wang, Cheng-Hui (1); Li, Yin-Jie (1); Wang, Bo (1, 2); Liu, Zheng (1) Author affiliation:(1) Sichuan Academy of Environmental Sciences, Chengdu; 610041, China; (2) Sichuan Province Environmental Protection Technology Engineering Co., Ltd., Chengdu; 610041, China; (3) School of Environment, Tsinghua University, Beijing; 100084, China Corresponding authors:Xu, Chen-Xi(172626527@qq.com); Xu, Chen-Xi(172626527@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5736-5746 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The online monitoring of meteorology and ozone (O3) level and its precursors and parameters was carried out in the urban areas of Chengdu City during the combined ozone (O3) pollution process and fine particulate matter (PM2.5) from April to May, 2020. The pollution characteristics of O3 and its precursors and the sensitivity of O3 generation to its precursors were analyzed based on the OBM model and PMF. The study showed that the concentration of pollutants increased on the day when the ozone exceeded the standard, and the aromatic hydrocarbons and oxygen-containing (nitrogen) compounds in volatile organic compound (VOCs) species increased greatly. In the urban area of Chengdu, the ozone corresponding to the excessive O3 days was during the significant VOCs control, and aromatic hydrocarbons and olefin were the most sensitive to O3 generation and had the adverse effect of reducing NOx. Combined with the analysis of the source of VOCs, it was found that the main sources of VOCs in the urban areas were mobile sources (22.4%), catering and biomass combustion sources (21.8%), industrial sources (15.1%), solvent sources (9.3%), and solvent sources when the ozone level exceeded the standard. The contribution rate of catering and biomass combustion sources have increased significantly. It is suggested that Chengdu urban areas should focus on VOC emission reduction in the spring and strengthen the control of aromatic hydrocarbon-and olefin-related sources.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Volatile organic compounds Controlled terms:Aromatic hydrocarbons - Aromatization - Combustion - Emission control - Nitric oxide - Nitrogen oxides - Ozone Uncontrolled terms:Biomass combustion - Chengdu - Combustion sources - Main controlling factors - Ozone sensitivity - Ozone(O3) - Pollution process - Source analysis - Urban areas - Volatile organic compound Classification code:451.2 Air Pollution Control - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Age 8.22E-03yr, Percentage 1.51E+01%, Percentage 2.18E+01%, Percentage 2.24E+01%, Percentage 9.30E+00% DOI:10.13227/j.hjkx.202103201 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945254 Title:Selenium Geochemical Characteristics and Influencing Factors of Paddy Fields in Du'an County, Guangxi Title of translation:广西都安县典型水田硒地球化学特征及影响因素 Authors:Liu, Fei (1, 2, 3); Yang, Ke (1, 2, 3); Xu, Ren-Ting (1, 2, 3); Tang, Shi-Qi (1, 2, 3) Author affiliation:(1) Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding authors:Yang, Ke(yangkejs@qq.com); Yang, Ke(yangkejs@qq.com); Yang, Ke(yangkejs@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4897-4907 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study used 21 rock samples and 193 sets of paddy soil and rice grain samples collected form Baiwang Town, an area of clastic sedimentary rocks in Guangxi, China, to evaluate the potential for selenium-rich agriculture. We analyzed the concentrations of selenium and heavy metals in the soil and rice samples, and discuss the influencing factors by means of statistics and correlation analysis. The results showed that the selenium-rich rate of paddy soil and rice grain in Baiwang Town were 67.4% and 64.8%, respectively, but the content of cadmium in the selenium-rich soil samples was generally higher than the baseline value for China and the background value for Guangxi. In comparison to the screening value of soil pollution risk for agricultural land(GB 15618-2018), the over-standard rate of cadmium was 46.1%, while the over-standard rates of other heavy metals were negligible. The comparison shows that the selenium-rich rate of rice was 61.1% in the southern area of Baiwang Town with a negligible heavy metal content, and the advantages of green selenium-rich rice planting were clear. The correlation analysis showed that secondary enrichment was the main form of selenium enrichment in the study area. The soil pH and texture of the root-zone soil also affected the selenium content of the soil. The selenium content of rice seeds was mainly affected by the selenium content, active selenium content, pH, and aluminum oxide content of the root-zone soil. The risk assessment showed that the level of dietary exposure to cadmium is generally within safe limits, but it is still necessary to strengthen the monitoring of cadmium in rice and control cadmium pollution to reduce the levels of dietary exposure, especially in the central region of Baiwang Town.
© 2021, Science Press. All right reserved. Number of references:62 Main heading:Correlation methods Controlled terms:Alumina - Aluminum oxide - Arsenic - Cadmium - Chemical contamination - Factor analysis - Grain (agricultural product) - Pollution control - Risk analysis - Risk assessment - Sedimentary rocks - Selenium - Soil pollution - Soils - Textures Uncontrolled terms:Baiwang town, du'an county - Correlation analysis - Guangxi - Influence factor - Paddy soils - Paddy-rice - Rice - Rice grains - Soil sample - Standard rates Classification code:482.2 Minerals - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 822.3 Food Products - 914.1 Accidents and Accident Prevention - 922 Statistical Methods - 922.2 Mathematical Statistics Numerical data indexing:Percentage 4.61E+01%, Percentage 6.11E+01%, Percentage 6.48E+01%, Percentage 6.74E+01% DOI:10.13227/j.hjkx.202012118 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945506 Title:Response of Air Quality to COVID-19 Lockdown in Xiamen Bay Title of translation:厦门湾空气质量对新冠疫情管控的响应 Authors:Xu, Chao (1, 2); Wu, Shui-Ping (1, 2); Liu, Yi-Jing (3); Zhong, Xue-Fen (3) Author affiliation:(1) College of Environment and Ecology, Xiamen University, Xiamen; 361102, China; (2) Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen; 361102, China; (3) Fujian Provincial Academy of Environmental Science, Fuzhou; 350013, China Corresponding authors:Wu, Shui-Ping(wsp@xmu.edu.cn); Wu, Shui-Ping(wsp@xmu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4650-4659 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Air pollutant concentrations in the Xiamen Bay cities during the period before and after COVID-19 lockdown(from January 11 to February 21, 2020)were studied to determine the influence of human activities on air quality in this region. During the Chinese Spring Festival holiday and the lockdown period, the concentrations of SO2, NO2, CO, PM10, and PM2.5 decreased by 6%-22%, 53%-70%, 34%-48%, 47%-64%, and 53%-60%, respectively. However, the changes in O3 concentrations were not consistent with the variations of human activities. The reduction rates for PM2.5, PM10, CO, and NO2 during the Spring Festival were greater than in previous years(2018 and 2019), but the reduction rates for SO2 were comparable. The concentrations of NO2 increased sharply(38%-138%), and much higher those of SO2(2%-42%), after the resumption of socioeconomic activities, indicating the importance of traffic reductions due to the lockdown measures on NO2. Higher wind speeds and rainfall after the Spring Festival were also favorable for the decline of SO2, NO2, and PM. The spatio-temporal distributions of the six criterial pollutants in the Xiamen Bay city cluster were obtained based on the Inverse Distance Weight method. The variability in regions with high NO2 concentrations was strongly linked to traffic emissions, while spatial patterns for CO and SO2 changed little over the six-week study period. The concentrations of PM2.5 and PM10 increased notably in the region, linked to more construction activity, but changed comparatively little in regions with dense populations and traffic networks. O3 remained relatively stable but low-value regions corresponded to those regions with high NO2 concentrations, indicating the significant titration effect of NO2 on O3. These results provide valuable information that can inform O3 pollution reduction measures.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Air quality Controlled terms:Barium compounds - Construction industry - Inverse problems - Nitrogen oxides - Reduction Uncontrolled terms:Air pollutant concentrations - Chinese springs - COVID-19 - Human activities - Lockdown - PM 10 - PM 2.5 - Pollution reduction - Reduction rate - Xiamen bay city cluster Classification code:405 Construction Equipment and Methods; Surveying - 451.2 Air Pollution Control - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.00E+00% to 4.20E+01%, Percentage 3.40E+01% to 4.80E+01%, Percentage 3.80E+01% to 1.38E+02%, Percentage 4.70E+01% to 6.40E+01%, Percentage 5.30E+01% to 6.00E+01%, Percentage 5.30E+01% to 7.00E+01%, Percentage 6.00E+00% to 2.20E+01% DOI:10.13227/j.hjkx.202103009 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239935 Title:Heavy Metal Pollution and Cumulative Effect of Soil-crop Systems Around Typical Enterprises in Xiong'an New District Title of translation:雄安新区企业周边农田土壤-作物系统重金属污染风险及累积效应 Authors:Zhou, Ya-Long (1, 2, 3); Wang, Qiao-Lin (1, 2, 3); Wang, Cheng-Wen (1, 2, 3); Liu, Fei (1, 2, 3); Song, Yun-Tao (1, 2, 3); Guo, Zhi-Juan (1, 2, 3); Yang, Zhi-Bin (1) Author affiliation:(1) Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China; (3) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China Corresponding authors:Wang, Cheng-Wen(wchengwen@mail.cgs.gov.cn); Wang, Cheng-Wen(wchengwen@mail.cgs.gov.cn); Wang, Cheng-Wen(wchengwen@mail.cgs.gov.cn); Yang, Zhi-Bin(yzhibin@mail.cgs.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5977-5987 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to evaluate the influence of heavy metal pollution risk in a surrounding soil-crop system caused by industrial activities in enterprise-intensive areas and to analyze the characteristics of heavy metal content and excessive levels in wheat seed and root soil in farmland areas around the enterprise in Xiong'an new district, the geoaccumulation index (Igeo), potential ecological risk index (RI), principal component analysis, and correlation analysis were used to assess the pollution risk and source resolution. The results showed that 96.67% of the root soil samples had more than one kind of heavy metal present beyond the screening value of soil pollution risk to agricultural land (GB 15618-2018), whereas the content of Pb in 96.67% of wheat seed samples and Cd in 16.67% of wheat seeds exceeded the national food safety standards (GB 2762-2017). The pollution of Cd and Pb in root soil was relatively severe. The proportion of samples with medium to heavy pollution was 83.33% and 53.33%, respectively. The samples of Cu, Hg, and Zn in a light-and medium-polluted state accounted for more than 90%, whereas As and Ni showed a light-pollution state, and there was no Cr pollution present. The RI of root soil samples ranged from 212.69 to 1 022.69, and the RI in 73.33% samples was graded as a strong ecological risk. Cd had the greatest potential ecological harm, followed by Hg and Pb. The enrichment of Cd, Zn, and Cu in the soil was mainly affected by the production activities of surrounding enterprises, whereas As, Hg, and Pb were not only affected by the above factors but also might be affected by human sources, such as automobile exhaust and coal burning. Cr and Ni were mainly affected by natural geological background factors. The accumulation of heavy metal elements in the soil-crop system had a negative correlation with the distance from the enterprise (H), and the closer to the enterprise, the more significant the accumulation effect of the heavy metal elements in the surrounding soil-crop system.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Soils Controlled terms:Crops - Food safety - Heavy metals - Principal component analysis - Risk assessment - Screening - Soil pollution - Soil surveys Uncontrolled terms:Cumulative effects - Heavy metals pollution - Pollution risk - Risk indices - Soil heavy metals - Soil sample - Soil-crop system - Surrounding soils - Wheat seeds - Xiong'an new district Classification code:461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 802.3 Chemical Operations - 821.4 Agricultural Products - 822.3 Food Products - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.667E+01%, Percentage 5.333E+01%, Percentage 7.333E+01%, Percentage 8.333E+01%, Percentage 9.00E+01%, Percentage 9.667E+01% DOI:10.13227/j.hjkx.202103255 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239980 Title:Estimation of PM2.5 Concentration in Sichuan Province Based on Improved Linear Mixed Effect Model and Geo-intelligent Random Forest Title of translation:基于iLME+Geoi-RF模型的四川省PM2.5浓度估算 Authors:Wu, Yu-Hong (1); Du, Ning (1); Wang, Li (1); Cai, Hong (1); Zhou, Bin (1); Wu, Lei (1); Ao, Xiao (1) Author affiliation:(1) Mining College, Guizhou University, Guiyang; 550025, China Corresponding author:Du, Ning(ndu1@gzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5602-5615 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
High-resolution PM2.5 spatial distribution data is of great significance for the dynamic monitoring and control of PM2.5 pollution. Himawari-8 AOD data, ERA5 meteorological reanalysis data, DEM, land-use data, and luminous remote-sensing data were selected as estimating variables, using an improved resampling method for data matching and an improved linear mixed model (iLME) combined with a Geo-intelligent random forest model to build the combined model for estimating PM2.5 concentration. The results showed that: ① Among the estimated variables selected, AOD, SP, TEMP, RH, and BLH were important factors affecting the PM2.5 concentration of Sichuan Province in 2016, and their correlation coefficients were 0.65, 0.58, 0.55, 0.54, and 0.35, respectively. ② The prediction accuracy of the iLME+Geoi-RF model was greatly improved compared to that of other models. The model-fitted R2, RMSR, and MAE were 0.94, 5.72 μg•m-3, and 3.92 μg•m-3, and the cross-validated R2, RMSR, and MAE were 0.82, 10.20 μg•m-3, and 6.44 μg•m-3, respectively. The model can obtain more accurate spatial and temporal distribution characteristics of PM2.5 in Sichuan Province and provide a more reasonable scientific reference for regional air quality assessment, human exposure risk assessment, and environmental pollution control. ③ There was a significant seasonal difference in PM2.5 concentration in Sichuan Province, with the highest concentration of PM2.5 in winter, followed by spring and autumn, with the concentration of PM2.5 in summer being the lowest. In 2016, the monthly average PM2.5 concentration in Sichuan Province showed a V shape that first decreased and then increased, with the minimum value in June, the maximum value in December, and slight fluctuations in August and November. In terms of spatial distribution, the PM2.5 concentration in the eastern area of Sichuan Province was generally higher than that in the west, and the local pollution level was relatively high. The high-valued areas were mainly distributed in the eastern region, where the cities have been developing rapidly and the population was densely distributed, whereas the low-valued areas were mainly distributed in the western region, where it is sparsely populated with backward economic development. ④ Although the overall distribution of PM2.5 concentration estimated by the different models was essentially the same, the iLME+Geoi-RF model could more accurately and effectively estimate the spatial distribution of pollution in this study area.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Risk assessment Controlled terms:Air quality - Decision trees - Land use - Quality control - Remote sensing - Spatial distribution Uncontrolled terms:Collinearity - Collinearity diagnose - Himawari-8 AOD - ILME+geoi-RF model - Linear mixed models - Linear mixed-effects model - PM 2.5 - Resampling - Sichuan province - Temporal and spatial changes Classification code:403 Urban and Regional Planning and Development - 405.3 Surveying - 451.2 Air Pollution Control - 902.1 Engineering Graphics - 913.3 Quality Assurance and Control - 914.1 Accidents and Accident Prevention - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 961 Systems Science Numerical data indexing:Mass 1.02E-08kg, Mass 3.92E-09kg, Mass 5.72E-09kg, Mass 6.44E-09kg, Size 6.35E-02m DOI:10.13227/j.hjkx.202102048 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110401374 Title:Preparation of pg-C3N4/BiOBr/Ag Composite and Photocatalytic Degradation of Sulfamethoxazole Title of translation:pg-C3N4/BiOBr/Ag复合材料的制备及其光催化降解磺胺甲唑 Authors:Yang, Li-Wei (1); Liu, Li-Jun (1, 2); Xia, Xun-Feng (2); Zhu, Jian-Chao (2); Gao, Sheng-Wang (2); Wang, Hong-Liang (2); Wang, Shu-Ping (2) Author affiliation:(1) College of Civil Engineering, Chang'an University, Xi'an; 710000, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Gao, Sheng-Wang(gaosw@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2896-2907 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A pg-C3N4/BiOBr/Ag composite was successfully prepared by simple high-temperature calcination and co-precipitation methods. The composite was characterized by means of XRD, SEM, TEM, XPS, UV-Vis, BET, and photocurrent analyses alongside other detection methods, and the degradation of 10 mg•L-1 sulfamethoxazole was investigated under simulated visible light irradiation. The results showed that the pg-C3N4/BiOBr/Ag composite had the best degradation effect on sulfamethoxazole when the loading ratio of silver was 5%. Compared with pg-C3N4, BiOBr monomer, and pg-C3N4/BiOBr composite, the photocatalytic degradation effect of the pg-C3N4/BiOBr/Ag (5%) was significantly improved, and the degradation rate was almost 100% within 30 min. The reaction rate constant (0.210 16 min-1) was 13.15 times that of pg-C3N4/BiOBr. Through radical quenching experiments, it was shown that the main active substances in the photocatalytic degradation were holes (h+), superoxide radicals (•O2-), and singlet oxygen (1O2), among which superoxide radicals (•O2-) contributed the most. Cyclic tests of pg-C3N4/BiOBr/Ag showed that the synthesized material has good recyclability and application prospects.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Bromine compounds Controlled terms:Bismuth compounds - Degradation - Photocurrents - Photodegradation - Precipitation (chemical) - Rate constants Uncontrolled terms:Application prospect - Coprecipitation method - High-temperature calcination - Photo catalytic degradation - Photocurrent analysis - Superoxide radical - Synthesized materials - Visible-light irradiation Classification code:701.1 Electricity: Basic Concepts and Phenomena - 802.2 Chemical Reactions - 802.3 Chemical Operations Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Percentage 5.00e+00%, Time 1.80e+03s DOI:10.13227/j.hjkx.202009213 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582256 Title:Spatio-temporal Variation Characteristics Monitored by Remotely Sensed Technique of PM2.5 Concentration and Its Influencing Factor Analysis in Sichuan Basin, China Title of translation:四川盆地PM2.5浓度时空变化特征遥感监测与影响因子分析 Authors:Li, Meng-Zhen (1); Zhang, Ting-Bin (1, 2); Yi, Gui-Hua (3); Qin, Yan-Bin (1); Li, Jing-Ji (2, 4); Liu, Xian (1); Jiang, Jie (1) Author affiliation:(1) College of Earth Science, Chengdu University of Technology, Chengdu; 610059, China; (2) State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu; 610059, China; (3) College of Tourism and Urban-Rural Planning, Chengdu University of Technology, Chengdu; 610059, China; (4) College of Ecology and Environment, Chengdu University of Technology, Chengdu; 610059, China Corresponding author:Zhang, Ting-Bin(zhangtb@cdut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3136-3146 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The spread of atmospheric pollutants in the Sichuan Basin is difficult because of its unique topography, static wind, high humidity, and other meteorological conditions. Owing to the acceleration of urbanization and industrialization, PM2.5 pollution in the region is becoming increasingly severe, and the Sichuan Basin has become one of the key areas of national air pollution prevention and control. In this study, based on the remote sensing inversion product of PM2.5 concentration, spatial autocorrelation and gray correlation analyses are used to evaluate the spatial and temporal distribution characteristics and influencing factors of PM2.5 concentration in the Sichuan Basin. The results show that PM2.5 concentration has significant spatial aggregation; the high-high aggregation types are concentrated, low-low aggregation types are more dispersed, and coniferous forest has a significantly higher inhibitory effect on the absorption of PM2.5 than the shrub, grassland, and other vegetation types. The main meteorological factors affecting PM2.5 concentration in the Sichuan Basin are wind speed and temperature; population density and economic scale are the main human-activity factors affecting PM2.5 concentration in the Sichuan Basin, and the change in the industrial structure and scale also has a certain influence on the PM2.5 concentration.
© 2021, Science Press. All right reserved. Number of references:67 Main heading:Factor analysis Controlled terms:Air pollution control - Atmospheric humidity - Forestry - Population statistics - Remote sensing - Topography - Wind Uncontrolled terms:Air pollution prevention - Atmospheric pollutants - Gray correlation analysis - Meteorological condition - Meteorological factors - Spatial and temporal distribution - Spatial autocorrelations - Spatio-temporal variation Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 922.2 Mathematical Statistics - 951 Materials Science DOI:10.13227/j.hjkx.202009235 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404308 Title:Characteristic Analysis of SWAT Model Parameter Values Based on Assessment of Model Research Quality Title of translation:基于模型研究质量评价的SWAT模型参数取值特征分析 Authors:Rong, Yi (1); Qin, Cheng-Xin (1); Du, Peng-Fei (1); Sun, Fu (1) Author affiliation:(1) School of Environment, Tsinghua University, Beijing; 100084, China Corresponding author:Sun, Fu(sunfu@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2769-2777 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The soil and water assessment tool (SWAT) model is currently one of the most widely used watershed models in China. Since the model has been developed with distributed parameters and is customized to satisfy the environmental characteristics of the U.S.A., determining appropriate parameter values that reflect local features for model application in China is crucial. Some studies have proposed parameter values for the SWAT model by summarizing reported values in the literature; however, these studies neither differentiate the literature with respect to its quality nor consider non-uniformity in parameter values and the impact of extreme values. To address this, an indicator system for assessing the quality of SWAT model research was established, taking into account the process of model development, parameter calibration, and model validation as well as model performance. This screening approach was applied to a total of 428 journal articles on SWAT model research published between 2015 and 2017 were retrieved from the China National Knowledge Infrastructure database. The reported values of 15 model parameters involved in hydrology and sediment and nutrient simulation were extracted from highly credible articles and analysed in terms of statistical distributions, differences among geographic regions, and discrepancies between calibrated and default values. Results showed that the 129 highly credible journal articles screened generally followed good modelling practice and consisted of case studies from different regions across China. The statistical distributions of the 15 model parameters derived from the SWAT model studies exhibited a range of features including positive and negative skewness, and those of 4 parameters showed significant differences among regions where the watersheds are located. Furthermore, the calibrated values of 12 out of 15 parameters were significantly different from their default values. Considering the statistical characteristics of these model parameters, recommended parameter values for SWAT model application in China are proposed in the form of confidence intervals, and specific suggestions are also provided based on data availability.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Distributed parameter control systems Controlled terms:Statistical methods Uncontrolled terms:Characteristic analysis - Distributed parameter - Environmental characteristic - Good modelling practices - Parameter calibration - Soil and water assessment tool - Statistical characteristics - Statistical distribution Classification code:731.1 Control Systems - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202010216 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247643 Title:Distribution of Antibiotic Resistance Genes and Microbial Communities in a Fishery Reclamation Mining Subsidence Area Title of translation:渔业复垦塌陷地抗生素抗性基因与微生物群落 Authors:Cheng, Sen (1); Lu, Ping (1); Feng, Qi-Yan (2) Author affiliation:(1) School of Environment Science and Spatial Informatics, China University of Ming and Technology, Xuzhou; 221000, China; (2) Low Carbon Energy Institute, China University of Ming and Technology, Xuzhou; 221000, China Corresponding author:Lu, Ping(lupingcumt@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2541-2549 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The widespread use of antibiotics in the aquaculture industry has caused antibiotic resistance genes (ARGs) pollution. Metagenomics technology was used to detect and analyze the relative abundance of ARGs and microbial community structure in a fishery reclamation mining subsidence area. A total of 29 ARGs were detected, and bacA had the highest relative abundance in all the samples, reaching 1.96×10-5-1.19×10-4. The relative abundance of sulfonamide and tetracycline ARGs in sediments was relatively high and the relative abundance of multidrug ARGs in well water was relatively high. Proteobacteria was the most dominant bacterial phylum in all the samples, and Chloroflexi and Euryarchaeota were relatively abundant in the sediments. Thiobacillus was the most dominant bacterial genus in the sediments, and Acinetobacter and Pseudomonas were the dominant bacterial genera in the well water. The correlation analysis between the ARGs and microorganisms showed that the genera and ARGs were mainly correlated to a moderate degree, and multiple genera had significant positive correlations with ARGs. The distribution of ARGs was affected by the structure of the microbial community. The sediments and well water in the fishery reclamation mining subsidence area were both contaminated by ARGs, and corresponding control measures should be strengthened to protect the regional environment.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Reclamation Controlled terms:Antibiotics - Bacteria - Cutting machines (mining) - Fisheries - Genes - Sediments - Subsidence - Sulfur compounds Uncontrolled terms:Antibiotic resistance genes - Aquaculture industry - Correlation analysis - Microbial communities - Microbial community structures - Mining subsidence areas - Positive correlations - Regional environments Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 502.2 Mine and Quarry Equipment DOI:10.13227/j.hjkx.202009166 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582443 Title:Metagenomic Analysis of Resistance Genes in Membrane Cleaning Sludge Title of translation:基于宏基因组技术分析MBR膜清洗后污泥中抗性基因 Authors:Du, Cai-Li (1, 2); Li, Zhong-Hong (1, 3); Li, Xiao-Guang (1); Zhang, Lie-Yu (1); Chen, Su-Hua (3); Li, Jia-Xi (1); Li, Cao-Le (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (3) Key Laboratory of Jiangxi Province for Persistant Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang; 330063, China Corresponding authors:Li, Xiao-Guang(xgli1982@163.com); Zhang, Lie-Yu(zhangly@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3366-3374 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Wastewater treatment plants (WWTPs) are considered important reservoirs of antibiotic resistance genes (ARGs) and function as the main sources of ARGs in the environment. Membrane bioreactors (MBRs) have been recognized as effective tools for removing ARGs in WWTPs.There are a large number of pathogens and resistance genes in colloids, particulate matter, suspended matter, and microbial metabolites in intercepted wastewater by MBR. However, the distribution characteristics of resistance genes in membrane cleaning sludge remains unclear. In this study, resistance genes of membrane cleaning sludge were analyzed using a metagenomic technique. The results showed that there were 39 phyla in the membrane cleaning sludge. Proteobacteria, Nitrospirae, and Actinobacteria were the dominant phyla. The dominant genera were Nitrospira, Pseudomonas, and Bradyrhizobium. The pathogens accounted for 10.54% of all bacteria in the sample, among which Pseudomonas had the highest abundance, accounting for 3.94%. A total of 17 types of antibiotic resistance genes and 16 types of metal resistance genes (MRGs) (15 types of single metal resistance genes and 1 types of multi-heavy metal resistance gene) were identified. Multidrug resistance genes had the highest abundance, accounting for 49.08%. Multi-heavy metal resistance genes were the most abundant, accounting for 34.58%. The copper resistance genes were the most abundant of the single metal resistance genes, accounting for 19.99%. The most important functional pathway of microbial community in the membrane cleaning sludge was metabolic related, and many genes identified were related to human diseases. The numbers of genes related to bacterial resistance and bacterial infectious diseases were the largest, accounting for 34.50% and 16.62%, respectively. These results indicate that there were abundant ARGs, MRGs, and pathogens in the membrane cleaning sludge, which has potential environmental health risks. It is necessary to strengthen the control of ARGs, MRGs, and pathogens in membrane cleaning sludge to provide guidance for selecting appropriate technologies for effectively removing ARGs, MRGs, and pathogens.
© 2021, Science Press. All right reserved. Number of references:61 Main heading:Genes Controlled terms:Antibiotics - Bacteria - Biomarkers - Bioreactors - Cleaning - Health risks - Heavy metals - Membranes - Metabolites - Pathogens - Sewage treatment plants - Wastewater treatment Uncontrolled terms:Antibiotic resistance genes - Appropriate technologies - Copper resistance genes - Distribution characteristics - Environmental health risks - Heavy metal resistance - Microbial metabolites - Wastewater treatment plants Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 461 Bioengineering and Biology - 531 Metallurgy and Metallography - 802.1 Chemical Plants and Equipment - 802.3 Chemical Operations - 951 Materials Science Numerical data indexing:Percentage 1.05e+01%, Percentage 1.66e+01%, Percentage 2.00e+01%, Percentage 3.45e+01%, Percentage 3.46e+01%, Percentage 3.94e+00%, Percentage 4.91e+01% DOI:10.13227/j.hjkx.202010106 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247635 Title:Spatial Differences and Influencing Factors of Denitrification and ANAMMOX Rates in Spring and Summer in Lake Taihu Title of translation:太湖春夏两季反硝化与厌氧氨氧化速率的空间差异及其影响因素 Authors:Zhao, Feng (1, 2); Xu, Hai (2); Zhan, Xu (1); Zhu, Guang-Wei (2); Guo, Yu-Long (1); Kang, Li-Juan (2); Zhu, Meng-Yuan (2) Author affiliation:(1) School of Environmental and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) State Key Laboratory of Lake and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Zhan, Xu(xuzhan@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2296-2302 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Denitrification and ANAMMOX are the main nitrogen removal processes in lakes, which are of great significance for maintaining the nitrogen balance. Lake Taihu is a large, shallow lake. There are great spatial and temporal differences in the nutrient levels and algal blooms, which will affect the rates of denitrification and ANAMMOX. In order to understand the spatial and temporal variations in the denitrification and ANAMMOX rates and their influencing factors in Lake Taihu, undisturbed sediment cores were collected from Meiliang Bay, Gonghu Bay, Zhushan Bay, Dapukou Bay, Xukou Bay, and the center of Lake Taihu in the spring and summer of 2020. The results showed that the spatial distribution of the denitrification and ANAMMOX rates varied greatly in different areas of Lake Taihu in spring. The denitrification and ANAMMOX rates were (27.74±8.45)-(142.43±35.54) μmol•(m2•h)-1 and (2.35±1.06)-(17.95±8.66) μmol•(m2•h)-1, respectively. The contribution of ANAMMOX to nitrogen removal was relatively low, ranging from (7.82±1.71)% to (11.20±1.53)%. In summer, the denitrification and ANAMMOX rates were (165.68±62.14) μmol•(m2•h)-1 and (33.56±10.66) μmol•(m2•h)-1, respectively. The nitrogen removal rates were relatively low in other areas where the denitrification and ANAMMOX rates were (25.47±10.46)-(42.50±16.46) μmol•(m2•h)-1 and (2.65±0.94)-(5.95±2.65) μmol•(m2•h)-1, respectively. The contribution of ANAMMOX to nitrogen removal was (13.62±1.95)%-(7.24±1.78)%. The denitrification rate in summer was generally lower than that in spring, while the ANAMMOX rate did not decrease significantly compared with that in spring. The statistical analysis showed that the denitrification and ANAMMOX rates were significantly correlated with the substrate nitrogen concentration (P<0.01), which indicated that the nitrogen concentration was the main factor causing the difference in the nitrogen removal rates in different lake regions. In addition, there was a significant positive correlation between the contribution rate of ANAMMOX and the concentration of chlorophyll-a (P<0.05), thereby indicating that cyanobacteria blooms have a great influence on the change in the contribution of ANAMMOX to nitrogen removal.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Nitrogen removal Controlled terms:Denitrification - Lakes - Springs (components) - Wastewater treatment Uncontrolled terms:Cyanobacteria blooms - Denitrification rate - Nitrogen concentrations - Nitrogen removal process - Nitrogen removal rates - Positive correlations - Spatial and temporal variation - Temporal differences Classification code:452.4 Industrial Wastes Treatment and Disposal - 601.2 Machine Components - 802.2 Chemical Reactions DOI:10.13227/j.hjkx.202008303 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247528 Title:Emission Concentration and Characteristics of Particulate Matter and Water-Soluble Ions in Exhaust Gas of Typical Combustion Sources with Ultra-Low Emission Title of translation:超低排放典型燃烧源颗粒物及水溶性离子排放水平与特征 Authors:Hu, Yue-Qi (1, 2); Wang, Zheng (1, 2); Guo, Jian-Hui (1, 2); Feng, Ya-Jun (1, 2); Ding, Meng-Meng (1, 2); Yan, Xu (1, 2) Author affiliation:(1) Beijing Municipal Ecological and Environmental Monitoring Center, Beijing; 100048, China; (2) Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology, Beijing; 100048, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2159-2168 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A self-developed direct condensation sampling system and monitoring method for total particulate matter (TPM) in ultra-low-emission and high-humidity exhaust gas were applied to the emission monitoring of particulate matter in flue gas from three typical combustion sources with ultra-low emissions in Beijing. The emission levels and composition characteristics of particulate matter and water-soluble ions in the exhaust gas of typical combustion sources with ultra-low emissions were analyzed and evaluated. The interaction and influencing factors of filterable particulate matter (FPM) and condensable particulate matter (CPM) and their water-soluble ions were explored. The results showed that the emission concentration of FPM in the exhaust gas of the coal-fired boiler with ultra-low emissions was between 1.04 mg•m-3 and 1.11 mg•m-3 in standard smoke oxygen content, and that of TPM was between 3.82 mg•m-3 and 8.69 mg•m-3, which all met the national ultra-low emission limit (10 mg•m-3). However, the TPM emission concentration of the coal-fired power plant exceeded the emission limit of Beijing (5 mg•m-3). The emission concentrations of CPM and its total water-soluble ions from the coal-fired heating boiler were 3.05 mg•m-3 and 1.30 mg•m-3, respectively, which were significantly lower than those of the coal-fired power plant, and were related to the higher load and flue gas temperature of the coal-fired power plant. Furthermore, the emission concentrations of CPM and its total water-soluble ions from the coal-fired power plant boiler were 2.2 to 2.4 times and 1.7 to 2.2 times greater than those of the coal-fired heating boiler, respectively. The emission concentrations of TPM and its total water-soluble ions from the gas power plant were 1.99 mg•m-3 and 1.44 mg•m-3, respectively, which were significantly lower than those from the coal-fired boiler. CPM was the main form of particulate matter in the exhaust gas of the combustion source. The contribution of CPM to TPM in the ultra-low-emission boiler flue gas increased significantly, and increased with the increase in the flue gas temperature, ranging from 72.6% to 88.1% for the coal-fired boiler and 93.1% for the gas power plant. Total water-soluble ions made up 66.1% to 94.2% of the CPM. The flue gas temperature had a significant impact on the existing forms, removal efficiencies, and emission concentrations of particulate matter and water-soluble ions. SO42- was the main characteristic water-soluble ion of particulate matter in the coal-fired boiler, and its emission concentration ranged from 0.98 mg•m-3 to 1.18 mg•m-3, accounting for 27.7% to 49.6% of the total water-soluble ion emissions, which originated from flue gas desulfurization. F- was another characteristic water-soluble ion of particulate matter in the coal-fired power plant, and its emission concentration ranged from 1.91 mg•m-3 to 2.32 mg•m-3, accounting for 54.4% to 56.1% of the total water-soluble ion emissions, which might have been related to the high F content of fuel coal. NH4+ was the main characteristic water-soluble ion of particulate matter in the gas power plant, and its emission concentration was 0.92 mg•m-3, accounting for 64.2% of the total water-soluble ion emissions, which originated from the escape of NH3 in the process of selective catalytic reduction. The emission concentration of NH4+ was significantly higher than that of the coal-fired boiler; this might have been related to the synergistic removal effect of the gas-fired power plant, which lacked other purification facilities.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Fossil fuel power plants Controlled terms:Air purification - Ammonia - Coal - Coal combustion - Coal fired boilers - Coal fueled furnaces - Flue gases - Flues - Gas emissions - Ions - Mining - Particles (particulate matter) - Particulate emissions - Selective catalytic reduction - Smoke Uncontrolled terms:Coal-fired power plant - Composition characteristics - Condensable particulate matters - Emission concentration - Filterable particulate matter - Flue gas desulfurization - Purification facilities - Total particulate matter Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 502.1 Mine and Quarry Operations - 524 Solid Fuels - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 2.77e+01% to 4.96e+01%, Percentage 5.44e+01% to 5.61e+01%, Percentage 6.42e+01%, Percentage 6.61e+01% to 9.42e+01%, Percentage 7.26e+01% to 8.81e+01%, Percentage 9.31e+01% DOI:10.13227/j.hjkx.202010137 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247394 Title:Characteristics of Ozone Pollution and Relationships with Meteorological Factors in Jiangxi Province Title of translation:2016~2019年江西省臭氧污染特征与气象因子影响分析 Authors:Qian, Yue (1); Xu, Bin (2); Xia, Ling-Jun (1); Chen, Yan-Ling (1); Deng, Li-Chen (1); Wang, Huan (1); Zhang, Gen (3) Author affiliation:(1) Jiangxi Ecological Meteorology Center, Nanchang; 330096, China; (2) Jiangxi Provincial Climate Center, Nanchang; 330096, China; (3) State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing; 100081, China Corresponding authors:Xia, Ling-Jun(32899694@qq.com); Zhang, Gen(zhanggen@cma.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2190-2201 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the pollutant data provided by the environmental monitoring stations and the routine observation data of 11 national meteorological stations in Jiangxi Province from 2016 to 2019, the characteristics of ozone pollution and the relationships with meteorological factors were investigated in this study. The results showed that ozone pollution has become increasingly severe in Jiangxi Province in recent years. The annual mean concentration of ozone in Jiangxi Province (the maximum daily 8 h average) was 80.1 μg•m-3 in 2016 and reached up to 98.2 μg•m-3 in 2019, with an average annual growth rate of 6 μg•m-3. The number of over-standard days of ozone was 475 d, accounting for 72.6% of 2019 in Jiangxi Province. The average concentrations observed in summer were higher than those observed in the other seasons during 2016 to 2018, but in 2019, higher ozone concentrations were observed in autumn owing to the lower precipitation, more sufficient sunshine, and the resulting higher air temperature. Overall, the ozone concentrations were found to be positively correlated with air temperature and sunshine but negatively correlated with relative humidity in Jiangxi Province. A high ozone concentration usually appeared with an air temperature higher than 30℃, relative humidity of 20%-40%, and wind speed of 2-3 m•s-1. The spatial distribution of the ozone concentrations exhibited distinct characteristics with higher values observed in southern Jiangxi relative to those in the northern areas and lower values in northeastern Jiangxi compared with those in other regions. More serious ozone pollution was found in Ganzhou among the 11 cities in Jiangxi Province, with the highest annual concentration of 104.2 μg•m-3 observed in 2019. The results of the model analyses, including the HYSPLIT backward trajectory model and potential source contribution function model, indicated that there was a significant difference in the potential source contribution of ozone pollution in Ganzhou on seasonal scales, specifically in central Guangdong and the northwest of Jiangxi Province in spring, the northwest parts of Jiangxi Province in summer, and the north of Guangdong and central Anhui Province in autumn.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Air pollution Controlled terms:Atmospheric temperature - Ozone - Wind Uncontrolled terms:Average annual growth rates - Average concentration - Backward trajectory - Environmental Monitoring - Meteorological factors - Meteorological station - Ozone concentration - Potential source contribution function models Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 804 Chemical Products Generally Numerical data indexing:Percentage 2.00e+01% to 4.00e+01%, Percentage 7.26e+01%, Time 2.88e+04s, Velocity 2.00e+00m/s to 3.00e+00m/s DOI:10.13227/j.hjkx.202007309 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779823 Title:Variation Characteristics and Source Analysis of Carbonaceous Aerosols in Winter in Jiashan Title of translation:嘉善冬季碳质气溶胶变化特征及其来源解析 Authors:Zhang, Ying-Long (1); Li, Li (1); Wu, Wei-Chao (1); Lü, Sheng (1); Qin, Yang (2); Zhu, Xin-Ming (1); Gao, Jin-Hui (3); Tang, Qian (4); Xia, Zheng (4) Author affiliation:(1) Jiaxing Eco-Environmental Monitoring Center of Zhejiang Province, Jiaxing; 314000, China; (2) School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (3) Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen; 518055, China; (4) Zhejiang Eco-Environmental Monitoring Center, Hangzhou; 310012, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4116-4125 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Organic carbon (OC), elemental carbon (EC), and PM2.5 concentration data obtained from Shanxi Super Station in Jiashan County of Jiaxing City, in the winter of 2018 and 2019, were analyzed to determine the variation and potential source areas of carbonaceous aerosols. The results show that OC concentrations in the winter of 2018 and 2019 were 6.90 μg•m-3 and 5.63 μg•m-3, respectively, while EC concentrations were 2.47 μg•m-3 and 1.57 μg•m-3, respectively. The concentrations of OC and EC in the winter of 2019 were lower than those in the winter of 2018, by approximately 18.4% and 36.4%, respectively. In 2018 and 2019, the concentrations of secondary organic carbon (SOC), calculated using the minimum R-squared (MRS) method, were 1.49 μg•m-3 and 1.97 μg•m-3, respectively, and the concentrations of primary organic carbon (POC) were 5.41 μg•m-3 and 3.66 μg•m-3, respectively. The proportion of POC in OC showed a downward trend, from 96.0% in December 2018 to 64.9% in February 2020, indicating a decrease of 31.1 percentage points. SOC showed an upward trend, increasing by 31.1 percentage points from 4.0% in December 2018 to 35.1% in February 2020. It is worth noting that with the increase in PM2.5 concentration, the concentration of OC and EC increased by 474.7% and 408.2%, respectively, although the proportion of OC in PM2.5 decreased from 18.8% to 12.3%. and the percentage of OC decreased from 5.8% to 3.3%. The contribution of POC to PM2.5 did not fluctuate, and only decreased significantly above 150 μg•m-3, while the contribution of SOC to PM2.5 first decreased and then increased. In Jiaxing, the potential sources of OC and EC were mainly southern Jiangsu, southeastern Anhui, local Jiaxing, and northern Zhejiang. In the winter of the contribution concentrations of OC and EC in the main potential source regions were approximately 2 μg•m-3 and 6 μg•m-3 lower, respectively, than in winter 2018. The range of high values in the potential source regions also decreased in 2019. Before the COVID-19 epidemic, it was affected by both motor vehicle exhaust emissions and coal burning. During the Spring Festival and home isolation, due to traffic control and other reasons, motor vehicle emissions were reduced, which leaving coal burning as the main contributor.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Organic carbon Controlled terms:Aerosols - Traffic control Uncontrolled terms:Carbonaceous aerosol - Motor vehicle emissions - PM2.5 concentration - Potential source regions - Potential sources - Primary organic carbons - Secondary organic carbons (SOC) - Variation characteristics Classification code:804.1 Organic Compounds Numerical data indexing:Percentage 1.84e+01%, Percentage 1.88e+01% to 1.23e+01%, Percentage 2.02e+03% to 3.51e+01%, Percentage 2.02e+03% to 6.49e+01%, Percentage 3.64e+01%, Percentage 4.00e+00%, Percentage 4.08e+02%, Percentage 4.75e+02%, Percentage 5.80e+00% to 3.30e+00%, Percentage 9.60e+01% DOI:10.13227/j.hjkx.202101167 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779883 Title:Response of Soil Archaeal Community to Heavy Metal Pollution in Different Typical Regions Title of translation:不同地区土壤古菌群落对重金属污染的响应 Authors:Li, Yu-Tong (1, 2, 3); Yang, Shan (1); Zhang, Yi (1); Fan, Li (1, 2, 3); Liu, Kun (1); Zhang, Sheng (1) Author affiliation:(1) Chongqing Academy of Eco-environmental Science, Chongqing; 401147, China; (2) College of Environment and Ecology, Chongqing University, Chongqing; 400044, China; (3) State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing; 400044, China Corresponding author:Liu, Kun(liukun_cqraes@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4481-4488 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Soil archaeal communities play an essential role in the biogeochemical cycles of agricultural ecosystems. However, the response and mechanisms of soil archaeal community structure and assembly processes to heavy metal pollution remain poorly understood. This study examined the archaeal community composition and assembly process and their relationships with environmental factors in arable soils around high geological background areas, metal enterprises, and mining areas, based on high-throughput sequencing. The arable soils within the study area exhibited high spatial heterogeneity of heavy metal content, as well as severe cadmium pollution. The ecological risk levels were high in some soil samples from mining areas, but low to moderate in other soil samples. Crenarchaeota (62.7%-98.3%) was the dominant phyla in all soil samples, followed by Halobacterota (1.1%-23.2%). The pH, organic matter, arsenic, and lead contents of the soil were significantly correlated with the archaeal community (P< 0.05), making them the main driving factors of archaeal community structure. The null-model analysis showed that the assembly process of the archaeal community was mainly influenced by heterogeneous processes, including heterogeneous selection (deterministic process) and dispersal limitation (stochastic process). Heterogeneous selection played a vital role in our study areas, while homogeneous selection only occurred in samples around the metal enterprises. Therefore, environmental selection was the ultimate driver of the archaeal community assembly process in this study, and its relative importance varied according to habitat type. Environmental heterogeneity increased the contribution of heterogeneous selection to community assembly, thus enhancing the community's resistance to environmental stress, and contributing to the stability and sustainability of the agricultural ecosystem.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Soils Controlled terms:Agricultural robots - Assembly - Biogeochemistry - Ecosystems - Forestry - Heavy metals - Pollution control - Random processes - Soil surveys - Stochastic models - Stochastic systems - Sustainable development Uncontrolled terms:Agricultural ecosystems - Community composition - Deterministic process - Environmental factors - Environmental heterogeneity - Geological background - Heavy metal pollution - High-throughput sequencing Classification code:454.3 Ecology and Ecosystems - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 922.1 Probability Theory - 961 Systems Science Numerical data indexing:Percentage 1.10e+00% to 2.32e+01%, Percentage 6.27e+01% to 9.83e+01% DOI:10.13227/j.hjkx.202101237 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247437 Title:Effects of Three Commonly Used Herbicides on Bacterial Antibiotic Resistance Title of translation:3种常用除草剂对细菌抗生素耐药性的影响 Authors:Li, Xi (1); Liao, Han-Peng (1); Cui, Peng (1); Bai, Yu-Dan (1); Liu, Chen (1); Wen, Chang (1); Zhou, Shun-Gui (1) Author affiliation:(1) College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou; 350002, China Corresponding author:Liao, Han-Peng(liaohp@fafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2550-2557 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The spread of antibiotic resistance has become a serious threat to global public health. Recently, several studies have found that non-antibiotic chemicals can promote the generation and spread of bacterial antibiotic resistance. However, the effects of herbicides on the antibiotic resistance of bacteria remain unclear. In this study, Escherichia coli DH5α was used as the model strain to explore the effects of three commonly used herbicides (glyphosate, glufosinate, and dicamba) on the antibiotic resistance under soil environmental concentrations. The results showed that herbicide exposure affected the sensitivity of E. coli DH5α to antibiotics and significantly improved the resistance of E. coli DH5α to gentamicin (glyphosate>dicamba>glufosinate). After 30 d of herbicide exposure, the E. coli mutant strains enhanced the resistance to tetracycline, chloramphenicol, and aminoglycoside antibiotics, and the minimum inhibitory concentration of streptomycin was increased by 19.8 times. The whole-genome sequencing results illustrated that herbicides induced several previously well-characterized mutations associated with membrane proteins (ompF and papC), fimbriae proteins (yraH), and ribosomes (rpsL) related to antibiotic resistance. Together, the results showed that herbicides can enhance the antibiotic resistance of bacteria via inducing genetic mutations, thereby promoting the potential risk of the spread of antibiotic resistance genes in the environment.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Antibiotics Controlled terms:Escherichia coli - Health risks - Herbicides - Proteins - Weed control Uncontrolled terms:Aminoglycoside antibiotics - Antibiotic resistance - Antibiotic resistance genes - Bacterial antibiotic resistance - Environmental concentration - Global public health - Minimum inhibitory concentration - Whole genome sequencing Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202009249 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779631 Title:Effect of Hydraulic Residence Time on Removal Efficiency of Pollutants in Subsurface Flow Constructed Wetlands and Analysis of Denitrification Mechanism Title of translation:水力停留时间对潜流湿地净化效果影响及脱氮途径解析 Authors:Qi, Ran (1, 2, 3); Zhang, Ling (1, 2); Yang, Fan (1); Yan, Chang-Zhou (1) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou; 350002, China Corresponding author:Yan, Chang-Zhou(czyan@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4296-4303 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study used vertical and horizontal subsurface constructed wetlands with continuous inflow, to compare and analyze the effects of four hydraulic residence times on the removal efficiency of conventional pollutants. Using the optimal hydraulic retention time, the two types of wetlands were examined in terms of the stromal layer nitrification, denitrification, and ammonia oxidation abundance of functional genes, as well as the intensity of nitrification and denitrification. In addition, redundancy analysis and variance decomposition analysis were used to determine the main factors affecting nitrogen removal in the two kinds of wetlands, so that targeted improvement measures can be suggested. The best removal efficiency of conventional pollutants (COD, TP, TN, and NH4+-N) was achieved with a hydraulic retention time of 24 h, resulting in a removal rate of more than 70%. With a 24 h retention time, the removal rate of NH4+-N and TN and the intensity of nitrification and denitrification exhibited a gradually decreasing trend along the flow direction. Among the three functional genes, the abundance of denitrification functional genes (nirS) was much higher than that of nitrification functional genes (nxrA) and ammonia oxidation functional genes (AOB-amoA). In this study, the nitrogen removal ability of the two subsurface flow constructed wetlands was jointly affected by environmental factors and microbial factors, among which microbial factors contributed the most to nitrogen removal (55% and 48%). In addition, the removal rates of TN and NH4+-N were proportional to DO, specific surface area of substrate, COD concentration, as well as nitrification and denitrification functional genes, but inversely proportional to pH. Therefore, in order to improve the nitrogen removal efficiency of both systems, the amount of dissolved oxygen and carbon sources in the substrate layer should be increased, while the pH value should be appropriately reduced. Moreover, the horizontal subsurface constructed wetland significantly improves the nitrogen removal efficiency of the system, as the substrate layer has a larger specific surface area. This study provides a theoretical basis for the design of constructed wetlands and the selection of an optimal hydraulic residence time. Quantitative analysis of nitrogen removal pathways is of great significance for understanding the nitrogen removal mechanism and improving the nitrogen removal rate in constructed wetlands.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Nitrogen removal Controlled terms:Ammonia - Chemical oxygen demand - Denitrification - Dissolved oxygen - Efficiency - Genes - Nitrification - Pollution - Specific surface area - Wetlands Uncontrolled terms:Environmental factors - Hydraulic residence time - Hydraulic retention time - Nitrification and denitrification - Nitrogen removal efficiency - Nitrogen removal rates - Subsurface flow constructed wetlands - Variance decomposition Classification code:461.2 Biological Materials and Tissue Engineering - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Percentage 4.80e+01%, Percentage 5.50e+01%, Percentage 7.00e+01%, Time 8.64e+04s DOI:10.13227/j.hjkx.202101100 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582247 Title:Effects of Cold Acclimation on the Activity of Autotrophic Nitrogen Removal in Granular Sludge and Its Bacterial Population Structure Title of translation:低温驯化对自养脱氮颗粒污泥功能活性与菌群结构的影响分析 Authors:Qian, Fei-Yue (1); Liu, Yu-Xin (1); Wang, Jian-Fang (1, 2, 3); Liu, Wen-Ru (1, 2, 4) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) College of Tianping, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (4) Jiangsu High Education Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China Corresponding author:Wang, Jian-Fang(wjf302@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3422-3429 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Cold acclimation is an effective approach for improving the nitrogen removal performance and operational stability of partial nitritation/ANAMMOX (PN/A) combined processes at low temperatures. To explore the specific effects of cold acclimation on the characteristics of sludge, differentiations in temperature sensitivity, granular morphology, composition of extracellular polymer substance (EPS), and bacterial community structure between PN/A granular sludges cultivated at medium-high temperature (30℃) and acclimated to low temperature (15℃) were investigated in this study. The results of reaction thermodynamics showed that the nitrogen removal performance of the granules acclimated to low temperature (GL) was significantly higher than that of those cultivated at medium-high temperature (GH) under the low temperature (10-20℃), and the apparent activation energy (Ea) of total inorganic nitrogen removal for the former was decreased by 28.4%. Compared with GH, GL had a smaller average particle size of 25.8% and higher EPS contents of 16.6%, resulting in a significant lower settling property. Based on the high-throughput sequencing results, GL exhibited a higher diversity of bacterial community, and a lower relative abundance ratio (0.04) of aerobic ammonium-oxidizing bacteria (Nitrosomonas) and anaerobic ammonium-oxidizing bacteria (Candidatus_Kuenenia) than 0.34 for GH. It indicated that the PN/A granules held a strong ability to retain slow-growing autotrophic bacteria in the system, even under low temperatures. These findings could provide meaningful references for analyzing the self-adaption mechanisms of PN/A sludge to low temperature conditions and promote the industrial application of combined processes.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Temperature Controlled terms:Activation energy - Aerobic bacteria - Cultivation - Granular materials - Granulation - Nitrogen removal - Particle size - Polymethyl methacrylates Uncontrolled terms:Ammonium oxidizing bacteria - Apparent activation energy - Autotrophic nitrogen removal - Bacterial community structure - Extracellular polymer substance - High-throughput sequencing - Low temperature conditions - Medium-High temperatures Classification code:461 Bioengineering and Biology - 641.1 Thermodynamics - 802.3 Chemical Operations - 815.1.1 Organic Polymers - 821.3 Agricultural Methods - 951 Materials Science Numerical data indexing:Percentage 1.66e+01%, Percentage 2.58e+01%, Percentage 2.84e+01% DOI:10.13227/j.hjkx.202012003 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003360 Title:Biological Effect of Tetracycline Antibiotics on a Soil-Lettuce System and Its Migration Degradation Characteristics Title of translation:四环素类抗生素对土壤-生菜系统的生物效应及其迁移降解特性 Authors:Wang, Wei-Zhong (1); Chi, Sun-Lin (1); Xu, Wei-Hong (1) Author affiliation:(1) College of Resources and Environmental Sciences, Southwest University, Chongqing; 400715, China Corresponding author:Xu, Wei-Hong(xuwei_hong@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1545-1558 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Residual tetracycline antibiotics (TCs) in farmland soils with the application of livestock manure cause risks to the growth of vegetables and soil ecology. Here, pot experiments are carried out using through exogenous addition of different levels of oxytetracycline (OTC), tetracycline (TC), and chlortetracycline (CTC), to study the physiological toxicity, uptake, and transportation of TCs in lettuce. The subsequent degradation of TCs in soil was also evaluated along with analyses of soil enzyme activity and microbial population dynamics. The results showed that the biomass of lettuce decreased with application of TCs as well as the chlorophyll-a, chlorophyll-b, and carotenoid content. Consequently, net photosynthetic rates were inhibited, and SOD, POD, and CAT increased under the stress imposed by the TCs. With an increase in the level of TC application, uptake by lettuce plants increased while the bioconcentration and translocation factors decreased. When OTC, TC, and CTC in the soil were below 150 mg•kg-1, the health risk from the edible parts of lettuce was low (HQ<0.1). The TC degradation rate in different soils was ranked in the order of control soil>rhizosphere soil>bulk soil. The OTC degradation rates in the soils were significantly lower than for TC and CTC. TCs (150-1 350 mg•kg-1) significantly inhibited urease and rhizosphere catalase activity in soil and reduced the number of soil culturable bacteria and fungi.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Soils Controlled terms:Agriculture - Antibiotics - Chlorophyll - Degradation - Ecology - Enzyme activity - Fertilizers - Health risks - Temperature control Uncontrolled terms:Culturable bacteria - Degradation characteristics - Microbial population dynamics - Net photosynthetic rate - Oxytetracyclines (OTC) - Soil enzyme activity - Tetracycline antibiotics - Translocation factor Classification code:454.3 Ecology and Ecosystems - 461 Bioengineering and Biology - 483.1 Soils and Soil Mechanics - 731.3 Specific Variables Control - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202005087 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126235 Title:Synthesis of Magnetic Iron Modifying Biochar for Ammonia Nitrogen Removal from Water Title of translation:磁性铁基改性生物炭去除水中氨氮 Authors:Wang, Fang-Jun (1); Sang, Qian-Qian (1); Deng, Ying (1); Zhao, Yuan-Tian (1, 2); Yang, Ya (3); Chen, Yong-Zhi (1, 4); Ma, Juan (1, 4) Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Yunnan Shicheng Environmental Technology Co., Ltd., Kunming; 650034, China; (4) Gansu Province Wastewater Treatment Industry Technology Center, Lanzhou; 730070, China Corresponding author:Ma, Juan(meggyma@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1913-1922 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A significant factor for eutrophication is the excessive discharge of ammonia nitrogen. Unfortunately, traditional methods to remove ammonia nitrogen are ineffective when facing gradually strict rules. Recently, adsorption has gained interest from scholars due to its efficiency and safety in ammonia nitrogen treatment. In this study, a novel biochar, modified with magnetic iron, was synthesized through co-precipitation, which performed well in ammonia nitrogen removal. The maximum adsorption amount at 293 K of the composite that was synthesized at 80℃(MB80) was 17.52 mg•g-1. Meanwhile, the simulation results displayed a good fitting with the pseudo second order model and Langmuir model. Additionally, the adsorption mechanism could be attributed to electrostatic adsorption, porous filling, ion exchange, and hydrogen bonding. Noticeably, MB80maintained a good performance after 5 cycles, with desirable adsorption amount of 3.18 mg•g-1. This study aimed to provide an efficient method to treat ammonia nitrogen as well as a new way to dispose of municipal sludge.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Chemicals removal (water treatment) Controlled terms:Adsorption - Ammonia - Eutrophication - Hydrogen bonds - Ion exchange - Iron - Nitrogen removal Uncontrolled terms:Adsorption amounts - Adsorption mechanism - Ammonia nitrogen - Ammonia nitrogen removal - Electrostatic adsorption - Its efficiencies - Municipal sludge - Pseudo-second order model Classification code:545.1 Iron - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Temperature 2.93e+02K DOI:10.13227/j.hjkx.202009047 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804525 Title:Characteristics, Meteorological Influences, and Transport Source of Ozone Pollution in Zhengzhou City Title of translation:郑州市臭氧污染变化特征,气象影响及输送源分析 Authors:Wang, Xu-Dong (1); Yin, Sha-Sha (2); Yang, Jian (1); Yuan, Ming-Hao (3); Zhang, Rui-Qin (2); Li, Ya-Song (1); Lu, Xuan (1) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China; (3) Zhengzhou Ecological Environment Monitoring Center of Henan Province, Zhengzhou; 450007, China Corresponding author:Yin, Sha-Sha(shashayin@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:604-615 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on online monitoring data of air quality and meteorological parameters, the long-term variations, spatial differences, and meteorological influencing factors of ground-level ozone (O3) pollution in Zhengzhou were studied. In addition, the transport pathways and potential source regions of O3 were investigated. The results show that surface O3 concentrations at the city station in Zhengzhou City increased significantly during the period 2014-2018 (P<0.05) with a growth rate of 15.50 μg•(m3•a)-1, and the timespan of exceeding pollutant standards was extended. The monthly O3 variations showed an "M" pattern with the seasonal maximum in summer. The diurnal O3 variations showed a "single-peak" pattern with a diurnal concentrations peak at 15:00-16:00, while the diurnal peak at the rural station was relatively high (130.94 μg•m-3). At the urban station, the exceedance probability of O3concentrations was relative high when hourly temperature (T) exceeded 23℃, relative humidity (RH) was less than 65%, wind speed (WS) ranged 2.0-4.0 m•s-1, and wind direction was southeast or northeast. Based on the multivariate linear fitting of impact factors on O3, the main controlling factors at the city and industrial sites were also identified as T and RH compared to T and WS at the traffic and suburb sites. Back trajectory analysis and potential sources of O3 during different seasons were significantly different, with the dominant transport trajectories during spring and summer being short-distance and slow-moving airflows from the south and northeast; autumn and winter were characterized by long-distance and quick-moving airflows from the northwest. The high O3 concentrations observed in summer were mainly affected by local photochemical formation and regional transport from Hebei, Shandong, and Anhui Provinces.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Air quality Controlled terms:Growth rate - Ozone - Photochemical forming - Wind Uncontrolled terms:Back trajectory analysis - Diurnal concentrations - Exceedance probability - Main controlling factors - Meteorological influence - Meteorological parameters - Potential source regions - Transport trajectories Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 804 Chemical Products Generally Numerical data indexing:Percentage 6.50e+01%, Velocity 2.00e+00m/s to 4.00e+00m/s DOI:10.13227/j.hjkx.202006197 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003359 Title:Factors Affecting the Translocation and Accumulation of Cadmium in a Soil-Crop System in a Typical Karst Area of Guangxi Province, China Title of translation:广西典型岩溶区农田土壤-作物系统Cd迁移富集影响因素 Authors:Ma, Hong-Hong (1, 2, 3); Peng, Min (1, 2, 3); Guo, Fei (1, 2, 3); Liu, Fei (1, 2, 3); Tang, Shi-Qi (1, 2, 3); Yang, Zheng (1, 2, 3); Zhang, Fu-Gui (1, 2, 3); Zhou, Ya-Long (1, 2, 3); Yang, Ke (1, 2, 3); Li, Kuo (1, 2, 3); Liu, Xiu-Jin (1, 2, 3) Author affiliation:(1) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding authors:Peng, Min(pengmin@igge.cn); Liu, Xiu-Jin(liuxiujin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1514-1522 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the main factors influencing the translocation and accumulation of cadmium (Cd) in soil-crop systems in typical karst areas, 68 sets of paddy soil and rice grain samples were collected in Guangxi Province. These were used to analyze Cd concentrations and soil properties (pH, organic matter (OM) content, oxide content, and texture). Spearman's correlation coefficients and principal component analysis (PCA) were used to examine the effects of soil properties on Cd concentrations and identify the main influencing factors. The studied soils were highly enriched in iron oxide (TFe2O3), aluminum oxide (Al2O3), and manganese oxide (MnO) compared to background levels, with average concentrations of 20.2%, 19.0%, and 0.2%, respectively. However, the soils are relatively depleted in silica (SiO2), with an average concentration of 41.0%. The soils are strongly weathered and leached in study area, giving rise to rich occurrences of Fe-Mn nodules. The concentrations of TFe2O3 and MnO in the study soils were significantly correlated with soil Cd, rice seed Cd, and the Cd bioconcentration factor (BCF). The PCA analysis further showed that TFe2O3 and MnO in soils were the main factors affecting the migration and enrichment of Cd while soil pH, OM, and Al2O3 had less of an influence. Furthermore, SiO2 and soil texture indirectly affected the migration and enrichment of Cd. It is suggested that the Fe-Mn nodules effectively adsorb and immobilize Cd in the study area soils, acting as a heavy metal scavenger that reduced the biological accessibility of Cd.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Soil pollution Controlled terms:Alumina - Aluminum oxide - Binary alloys - Cadmium - Crops - Factor analysis - Iron oxides - Manganese oxide - Oxide minerals - Silica - Silicon - Soils - Textures Uncontrolled terms:Average concentration - Background level - Bioconcentration factor - Cd concentrations - Correlation coefficient - Oxide contents - Soil textures - Typical karst area Classification code:482.2 Minerals - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.90e+01%, Percentage 2.00e-01%, Percentage 2.02e+01%, Percentage 4.10e+01% DOI:10.13227/j.hjkx.202007138 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126225 Title:Potential of Arbuscular Mycorrhizal Fungi, Biochar, and Combined Amendment on Sandy Soil Improvement Driven by Microbial Community Title of translation:微生物群落驱动AM真菌, 生物炭及联合改良沙化土壤作用潜力 Authors:Zhang, Zhe-Chao (1); Yang, Jiu-Yang (1); Hao, Bai-Hui (1); Hao, Li-Jun (1); Luo, Jun-Qing (1); Li, Xue (1); Diao, Feng-Wei (1); Zhang, Jing-Xia (1); Guo, Wei (1) Author affiliation:(1) Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, Hohhot; 010021, China Corresponding author:Guo, Wei(ndguowei@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2066-2079 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Sandy soils are considered as a significant transition phase to desertification. The effective recovery of sandy soils is of great significance to mitigate the desertification process. Some studies have shown that arbuscular mycorrhizal (AM) fungi and biochar improved the sandy soil, but there have been very few studies regarding the combined effects of AM fungi and biochar amendments on sandy soil improvement. Additionally, the roles of the bacterial and fungal community during the process of sandy soil improvement remain unclear. A greenhouse pot experiment with four treatments, including a control (CK, no amendment), single AM fungi-assisted amendment (RI), single biochar amendment (BC), and combined amendment (BC_RI, biochar plus AM fungi), was set up. This study investigated the effects of different amendment methods on the Nitrariasi birica mycorrhizal colonization, biomass, nutrient (N, P, K, Ca, and Mg) content, soil organic carbon, soil nutrient (TN, TP, and TK) content, and soil water-stable aggregate composition. High throughput sequencing technology was used to investigate the roles of the bacterial and fungal communities during the process of sandy soil improvement. Combined with multiple analysis methods, the improvement mechanisms of different amendment methods were explored. The aim was to provide basic data and scientific basics for reasonably and effectively improving sandy soils. The results indicated that a significant mycorrhiza colonization was observed in the inoculation (RI and BC_RI) treatments, but there was no substantial difference in the mycorrhiza colonization with the RI and BC_RI. Compared with the CK, the shoot biomass and shoot element (N, K, Ca, and Mg) contents were significantly increased in the RI, and the shoot element (N, P, K, Ca, and Mg) contents were significantly increased in the BC and BC_RI; compared with the RI and BC, the root biomass and the root element (P, K, Ca, and Mg) contents were significantly increased in the BC_RI. Compared with the CK, the soil organic carbon contents were significantly increased in the BC and BC_RI, the soil TN contents were significantly increased by 152.54%, and the soil TP and TK contents were significantly decreased by 12.5% and 18.8%, respectively. The proportion of soil aggregates with particle sizes of 0.25-0.05 mm was the highest in each treatment, and the large particle size (>0.25 mm) soil aggregate was significantly increased in the BC_RI. Compared with the CK, the Sobs and Shannon indices of the bacterial/fungal community were significantly decreased in the RI and BC_RI. There was a difference in the microbial community compositions and abundance in the various treatments. The results of the RDA and network analysis were as follows: the effects of AM fungi, biochar, and combined amendment on the soil environment and microbial community structure were significant; in the different amendment treatments, the relationship of the microbial molecular ecological network was significantly changed, and the composition of the core species varied; compared with the RI, there was a higher network connection degree and a richer core species composition in the BC and BC_RI; moreover, the essential role of Rhizophagus intraradices was weaken and the core roles of the other microorganisms (especially bacterial species) were enhanced under the combined effects of biochar and AM fungi. The SEM results demonstrated that the application of AM fungi and biochar could directly affect the bacteria/fungi community structure, and further affect the plant growth and soil properties. The differences in the microbial community structure (especially the change in the microbial interaction) were the key driving factors that led to the difference in the soil improvement effectiveness. In summary, the effects of the different amendment methods on the improvement effectiveness of sandy soils varied. The microbial community played key roles in the process of sandy soil improvement, and there were potential advantages and applications in accelerating the ecological restoration of sandy soils under the combined AM fungi and biochar amendment.
© 2021, Science Press. All right reserved. Number of references:63 Main heading:Fungi Controlled terms:Aggregates - Bacteria - Biomass - Climatology - Ecosystems - Magnesium compounds - Nutrients - Organic carbon - Particle size - Particle size analysis - Sand - Soil moisture - Structure (composition) Uncontrolled terms:Arbuscular mycorrhizal fungi - High-throughput sequencing - Microbial community composition - Microbial community structures - Microbial interactions - Mycorrhizal colonization - Soil organic carbon content - Soil water-stable aggregates Classification code:406 Highway Engineering - 443 Meteorology - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 1.25e+01%, Percentage 1.53e+02%, Percentage 1.88e+01%, Size 2.50e-04m to 5.00e-05m DOI:10.13227/j.hjkx.202008154 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688815 Title:Distribution and Ecological Risk Assessment of PPCPs in Drinking Water Sources of Henan Province Title of translation:河南省地表水源中PPCPs分布及生态风险评价 Authors:Zhou, Ying (1); Wu, Dong-Hai (1); Lu, Guang-Hua (1); Yao, Jing-Jing (2); Wei, Lei (3); Han, Feng (3) Author affiliation:(1) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China; (2) Water Conservancy Project & Civil Engineering College, Tibet Agriculture & Animal Husbandry University, Linzhi; 860000, China; (3) Hydrology and Water Resources Bureau of Henan Province, Zhengzhou; 450004, China Corresponding author:Lu, Guang-Hua(ghlu@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:159-165 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The occurrence of emerging pollutants pharmaceuticals and personal care products (PPCPs) in aquatic environments has potential adverse effects on aquatic organisms, and the presence of PPCPs in drinking water sources is very likely to cause harm to human health. The PPCPs pollution in five typical drinking water sources in Henan province was investigated. Moreover, the source of pollutants was analyzed and the relevant ecological risks were evaluated. The results showed that the cumulative concentrations of 20 PPCPs at different sampling sites ranged from 24.2 to 317.6 ng•L-1. Caffeine (CFI) was the highest level contaminant, with the concentration up to 186.4 ng•L-1, followed by sulfamethoxazole (SMX) and ofloxacin (OFC), with detected concentrations up to 70.8 ng•L-1 and 24.2 ng•L-1, respectively. The pollution of PPCPs in Heigangkou drinking water sources was higher than those of other drinking water sources. The comparation of the labile indicator CFI and the conservative indicator carbamazepine (CBZ) concentrations implies that the pollutions from the upstream water and around scattered domestic sewage might be responsible for the PPCPs present in these drinking water sources. The risk quotient (RQ) calculation results indicated that the detected PPCPs in 5 drinking water sources have moderate to high risks to algae, while low to moderate risks to invertebrates and fish. Therefore, attention should be paid to relevant pollution control.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Potable water Controlled terms:Amides - Aquatic organisms - Pollution control - Risk assessment - River pollution - Sewage Uncontrolled terms:Aquatic environments - Calculation results - Drinking water sources - Ecological risk assessment - Ecological risks - Emerging pollutants - Pharmaceuticals and personal care products - Sulfamethoxazole (SMX) Classification code:444 Water Resources - 452.1 Sewage - 453 Water Pollution - 471 Marine Science and Oceanography - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.86e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 2.42e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 2.42e-08kg/m3 to 3.18e-07kg/m3, Mass_Density 7.08e-08kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202005239 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688835 Title:Bioaccessibility and Health Risks of the Heavy Metals in Soil-Rice System of Southwest Fujian Province Title of translation:闽西南土壤-水稻系统重金属生物可给性及健康风险 Authors:Lin, Cheng-Qi (1, 2); Cai, Yu-Hao (1); Hu, Gong-Ren (3); Yu, Rui-Lian (3); Hao, Chun-Li (1); Huang, Hua-Bin (1, 3) Author affiliation:(1) College of Environment and Public Health, Xiamen Huaxia University, Xiamen; 361024, China; (2) Key Laboratory of Fujian Universities for Environmental Monitoring, Xiamen; 361024, China; (3) College of Chemical Engineering, Huaqiao University, Xiamen; 361021, China Corresponding author:Huang, Hua-Bin(Huanghuabinhx@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:359-367 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The bioaccessibility and health risks of heavy metals in soil-rice system of southwestern Fujian province were studied by combining a simple bioavailability extraction method (SBET) with a health risk assessment model. The results showed that some heavy metals in the agricultural soils and rice of southwestern Fujian province were enriched. The contents of Cd, Zn, Pb, and Cu were greater than the screening value of soil pollution risk for agricultural land (GB 15618-2018) by 32.4%, 15.5%, 14.1%, and 12.7% in the study areas, respectively. The accumulation ability of heavy metals was different and followed the approximately decreasing order of Cd>Zn>Cu>Ni>Hg>As>Cr>Pb. The bioaccessibility of heavy metals in soils and rice were quite different. The bioaccessibility of each heavy metal in rice was greater than the bioaccessibility of the heavy metals in soil, which indicated that the heavy metals in rice were more easily absorbed by the human body. The comprehensive non-carcinogenic risk index (HI) of heavy metals to adults and children was 2.71 and 4.06, respectively, indicating that there were non-carcinogenic risks. The comprehensive carcinogenic risk index (TCR) of heavy metals to adults and children was 1.42×10-3 and 5.28×10-4, respectively, indicating that there was a carcinogenic risk present. The non-carcinogenic risks were mainly due to As, while the carcinogenic risks were mainly contributed by Cd. The non-carcinogenic risk of children was higher than that of adults, while the carcinogenic risk of children was lower than that of adults. This result may be related to physiological characteristics, exposure period, and dietary intake. The dietary intake route may be the main pathway for heavy metals in the soil-rice system of southwest Fujian province to cause health risks. Therefore, more attention should be paid to the risks of dietary exposure in the risk management of heavy metals.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Health risks Controlled terms:Agricultural robots - Agriculture - Biochemistry - Extraction - Heavy metals - Nutrition - Risk assessment - Risk management - Soil pollution - Soils Uncontrolled terms:Accumulation ability - Agricultural land - Agricultural soils - Carcinogenic risk - Extraction method - Heavy metals in soil - Physiological characteristics - Southwestern Fujian Classification code:461.7 Health Care - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801.2 Biochemistry - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.27e+01%, Percentage 1.41e+01%, Percentage 1.55e+01%, Percentage 3.24e+01% DOI:10.13227/j.hjkx.202005247 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126214 Title:Distribution, Source, and Ecological Risk Evaluation of the PAHs and PCBs in the Sediments from Sanya River Title of translation:三亚河沉积物PAHs和PCBs的分布, 来源及风险评价 Authors:Zhan, Yong (1); T.-T., Wei; H.-B., Ye; B., Dong; L.-J., Zhang; Y.-D., Huang Author affiliation:(1) School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai; 200093, China; (2) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China Corresponding author:Dong, Bin(tj_dongbin@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1830-1838 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs), two typical persistent organic pollutants, are the research focus due to their mutagenesis, carcinogenesis, teratogenesis, and bioaccumulation. The content distribution and residual characteristics of PAHs and PCBs were investigated in the sediments from the Sanya River. Source apportionment was further explored based on the analysis of the spatial distribution, and the ecological risk evaluation was carried out with the sediment quality criteria and standards. The results indicate that the content of ∑PAHs and ∑PCBs in the sediment range from 265.00 μg•kg-1 to 6 735.00 μg•kg-1 and 1.75 μg•kg-1 to 92.75 μg•kg-1, with relatively high contents in the east and west river upstream, respectively, which had a strong correlation with the industrial structure and river movement of the study area. The composition and source apportionment demonstrate that PAHs originated mostly from the combustion of petroleum with low PAHs, and haxa-CB and hepta-CB are the predominant PCBs congeners, primarily resulting from the migration of PCBs in the capacitor. The ecological risk evaluation demonstrates that the biotoxic effect of the PAHs is not obvious, with a low ecological risk. However, several PAHs monomers exceeded the standard significantly in some sampling sites, which should be of concern due to its serious threat of exposure to organisms. The probability of a biotoxic effect of PCBs is 10%-50%, which occasionally produces a negative ecological effect.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Organic pollutants Controlled terms:Biochemistry - Mutagenesis - Polychlorinated biphenyls - Polycyclic aromatic hydrocarbons - Quality control - Risk assessment - Rivers - Sediments Uncontrolled terms:Content distribution - Industrial structures - Persistent organic pollutant (POP) - Polychlorinated biphenyl (PCBs) - Polycyclic aromatic hydrocarbons (PAHS) - Sediment quality criterion - Source apportionment - Strong correlation Classification code:461.8.1 Genetic Engineering - 483 Soil Mechanics and Foundations - 801.2 Biochemistry - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.00e+01% to 5.00e+01% DOI:10.13227/j.hjkx.202008267 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804526 Title:Distribution, Sources, and Ecological Risks of Polyfluoroalkyl Substances in the Surface Water of the Wuliangsuhai Watershed Title of translation:乌梁素海流域地表水中全氟化合物分布,来源及其生态风险 Authors:Shi, Rui (1, 2); Mao, Ruo-Yu (1, 3); Zhang, Meng (1, 3); Lü, Yong-Long (1, 3); Song, Shuai (1, 3); Zhao, Ji-Xin (4) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) Bayannaoer Environmental Information Monitoring Center, Bayannaoer; 015000, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Bayannaoer Institute of Environmental Science, Bayannaoer; 015000, China Corresponding author:Lü, Yong-Long(yllu@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:663-672 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Polyfluoroalkyl substances (PFASs) enter the environment through multi-media diffusion and long-distance migration during the long-term manufacture and use of products containing PFASs. This study analyzed 17 PFASs in surface water samples collected from the Wuliangsuhai watershed in the wet and dry seasons, and investigated the temporal and spatial distribution characteristics, potential sources, and ecological risks of PFASs in the study area. PFASs were detected in all surface water samples at concentrations ranging from 4.00 to 263.45 ng•L-1. The spatial distribution of PFASs was affected by local human activities and showed two main types of characteristics. The first type was associated with Yellow River and canal water, which had relatively low concentrations of PFASs and was dominated by perfluorobutanoic acid (PFBA). The second type was associated with drain and lake water receiving industrial, agricultural, and domestic wastewater from the Hetao irrigation area, which had relatively high levels of PFASs and was dominated by perfluorooctanoic acid (PFOA). The PFAS concentrations in water samples collected during the dry season were higher than those collected in the wet season, being affected by the increased production of short-chain PFASs and seasonal changes in the amount of water from the Yellow River. The results of PFOS/PFOA, PFOA/PFNA, and PFHpA/PFOA indicated that the PFASs in the study area originate from atmospheric deposition and point source pollution. The risk assessment results showed that the current risk level from PFOA and PFOS in the study area is relatively low but their long-term cumulative effects cannot be ignored due to the cumulative characteristics and long-distance migration ability of PFASs.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Surface waters Controlled terms:Agricultural robots - Drought - Meteorological problems - Risk assessment - River pollution - Spatial distribution - Watersheds Uncontrolled terms:Atmospheric depositions - Cumulative effects - Domestic wastewater - Perfluorooctanoic acid - Point source pollution - Polyfluoroalkyl substances - Temporal and spatial distribution - Wet and dry seasons Classification code:443.1 Atmospheric Properties - 444 Water Resources - 444.1 Surface Water - 453 Water Pollution - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Mass_Density 4.00e-09kg/m3 to 2.63e-07kg/m3 DOI:10.13227/j.hjkx.202005216 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003494 Title:Effect of Citric Acid and Phosphorus Coexistence on Cadmium Adsorption by Soil Title of translation:柠檬酸与磷共存对土壤吸附镉的影响 Authors:Song, Zi-Teng (1); Zuo, Ji-Chao (1); Hu, Hong-Qing (1) Author affiliation:(1) College of Resources and Environment, Huazhong Agricultural University, Wuhan; 430070, China Corresponding author:Hu, Hong-Qing(hqhu@mail.hzau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1152-1157 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In brown-red soil, the effect of phosphorus and citric acid co-existence on the adsorption of cadmium was studied using indoor experiments and isothermal equilibrium adsorption analysis. After treatment with different doses of phosphorus and citric acid, the fractions of cadmium were altered by varying dry and wet conditions. The results showed that: ① Soil treated with 10 mg•L-1 of CdCl2 solution showed no notable effect on cadmium adsorption when a low concentration of phosphorus was added (40 mg•L-1); however, higher a concentration of added phosphorus (80 mg•L-1) significantly increased cadmium adsorption (an increase of 78 g•kg-1 and 7.89% compared to the control treatment); ② Using a 40 mg•L-1 phosphorus solution, the addition of citric acid proportionally reduced cadmium adsorption. This inhibition effect was more notable for the soil treated with low-dose phosphorus (40 mg•L-1) than the high-dose treatment with 1 mmol•L-1 and 5 mmol•L-1 citric acid (cadmium adsorption decreased by 30.89% and 40.97%, respectively). The effect of citric acid was not significant, however, at higher concentrations of phosphorus. When the concentration of citric acid reached 5 mmol•L-1, cadmium adsorption was only 1% lower than without citric acid treatment; ③ Periodic dry-wet alternation significantly promoted the transformation of cadmium from a weak acid extractable and reducible state to an oxidizable and residual state in the soil. That is, the availability of cadmium in soil subjected to the combined action of phosphorus and citric acid decreased with an increase in wet and dry alternations.
© 2021, Science Press. All right reserved. Number of references:25 Main heading:Cadmium Controlled terms:Adsorption - Cadmium chloride - Chlorine compounds - Citric acid - Phosphorus - Soils Uncontrolled terms:Cadmium adsorption - Control treatments - Dry and wet conditions - Equilibrium adsorption - High-dose treatment - Indoor experiment - Inhibition effect - Low concentrations Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 8.00e-02kg/m3 to 2.20e-02kg/m3, Molar_Concentration 1.00e+00mol/m3 to 2.20e-02mol/m3, Molar_Concentration 5.00e+00mol/m3 to 2.20e-02mol/m3, Percentage 1.00e+00%, Percentage 3.09e+01%, Percentage 4.10e+01%, Percentage 7.89e+00% DOI:10.13227/j.hjkx.202007116 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688822 Title:Characteristics and Ecological Risk Assessment of POPs Pollution in Sediments of Xiaoxingkai Lake in the Northeast China Title of translation:东北小兴凯湖沉积物POPs污染特征及生态风险评价 Authors:Li, Hui (1, 2, 3, 4); Li, Jie (1, 2, 3, 4); Song, Peng (4); Cheng, Yun-Xuan (1, 2, 3); Jiao, Li-Xin (1, 2, 3); Yang, Ya-Zheng (1, 2, 3, 4) Author affiliation:(1) National Engineering Laboratory of Lake Water Pollution Control and Ecological Restoration Technology, Chinese Resarch Academy of Environmental Sciences, Beijing; 100012, China; (2) State Key Laboratory of Environmental Protection for Drinking Water Sources, Chinese Resarch Academy of Environmental Sciences, Beijing; 100012, China; (3) National Key Laboratory of Environmental Protection Lake Pollution Control, Chinese Resarch Academy of Environmental Sciences, Beijing; 100012, China; (4) College of Agriculture, Henan University of Science and Technology, Luoyang; 471000, China Corresponding author:Jiao, Li-Xin(jiaolx@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:147-158 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The pollution characteristics of polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), and phthalate esters (PAEs) in the surface sediments of Xiaoxingkai Lake were analyzed by GC-MS, and the main sources and biological toxicity risks of the pollutants were discussed. The results show that: ① The content of PAHs in the sediments of xiaoxingkai lake ranged from 82.1 to 534.6 ng•g-1, and the concentration of PAHs in the northwestern port of the lake was higher. The content of OCPs and PAEs in the sediments ranged from 4.8 to 50.4 ng•g-1 and 33.3 to 401.6 ng•g-1, respectively. The concentration was higher in the southeastern lakes. ② PAHs in the sediments were dominated by 3-5-ring compounds (accounting for more than 85%), which were mainly combustion sources, among which the combustion of coal and firewood contributed 47%, the combustion of gasoline and diesel contributed 39%, and the oil product leakage contributed 14%. The OCPs were mainly HCHs (78%) from the use of new lindane and the input of a small amount of industrial HCHs. The PAEs were mainly dibutyl phthalate (DBP) and diethyl phthalate (2-ethyl hexyl) ester (DEHP; 94%), which were mainly derived from household garbage and common human articles. ③ Compared with other lakes in China, PAHs and PAEs in the sediments of Xiaoxingkai Lake are at a low pollution level, and there is no ecological risk at present, but some OCPs at some points present a moderate ecological risk.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Lake pollution Controlled terms:Coal combustion - Coal industry - Esters - Lakes - Organic pollutants - Petroleum industry - Polycyclic aromatic hydrocarbons - Risk assessment - Sediments Uncontrolled terms:Biological toxicity - Combustion of coal - Combustion sources - Dibutyl phthalates - Diethyl phthalate - Ecological risk assessment - Organochlorine pesticides - Polycyclic aromatic hydrocarbons (PAHS) Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.40e+01%, Percentage 3.90e+01%, Percentage 4.70e+01%, Percentage 7.80e+01%, Percentage 8.50e+01%, Percentage 9.40e+01% DOI:10.13227/j.hjkx.202005131 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688816 Title:Combined Effect of Weathered Coal Based Amendments and Soil Water Management on Methylmercury Accumulation in Paddy Soil and Rice Grains Title of translation:风化煤组配改良剂结合水分管理对水稻根际土壤与稻米甲基汞含量的影响 Authors:Zheng, Shun-An (1, 2, 3); Wu, Ze-Ying (1, 2); Du, Zhao-Ling (1, 2, 3); Ni, Run-Xiang (1, 2); Yao, Qi-Xing (4) Author affiliation:(1) Rural Energy & Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing; 100125, China; (2) Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing; 100125, China; (3) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (4) College of Resources and Environmental Science, China Agricultural University, Beijing; 100083, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:386-393 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A pot experiment and field experiment were designed to study the changes in the grain methyl mercury content in paddy soil and rice yield by sowing soil amendments that contained weathered coal, CaCO3, and Na2SeO3 as the main raw materials, combined with water management in a paddy field (80% field capacity after the heading and flowering periods). The results showed that: ① In pot experiment, the content of methylmercury in rice rhizosphere soil decreased by 86.6% and the content of methylmercury in the rice grains decreased by 65.2% compared with that of the control. In field experiment, the content of methylmercury in rice rhizosphere soil decreased by 77.4% and the content of methylmercury in rice grains decreased by 60.6% upon adding the amendment+water management compared with that of CK. ② The soil pH increased by more than 0.3 in the pot experiment and 0.2 in the field experiment compared with that of the control. Furthermore, rice yield and plant biomass did not decrease in the two parts of the experiment. It can be inferred that the soil amendment and agronomic regulation measures (water management) used in this study have the advantages of quick effects, convenient use, and remarkable control effects and without secondary pollution. More, they can effectively reduce the risk of rice methylmercury exposure.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Soil pollution Controlled terms:Calcite - Calcium carbonate - Coal research - Grain (agricultural product) - Mercury compounds - Selenium compounds - Sodium compounds - Soil moisture - Soil pollution control - Soil surveys - Water management - Water pollution - Water pollution control Uncontrolled terms:Combined effect - Field experiment - Methyl mercury - Pot experiment - Regulation measures - Rice rhizospheres - Secondary pollution - Soil amendment Classification code:453 Water Pollution - 453.2 Water Pollution Control - 483.1 Soils and Soil Mechanics - 524 Solid Fuels - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 6.06e+01%, Percentage 6.52e+01%, Percentage 7.74e+01%, Percentage 8.00e+01%, Percentage 8.66e+01% DOI:10.13227/j.hjkx.202005175 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688837 Title:Emission Estimation and Fate Simulation of Dichlorvos in the Dongjiang River Watershed Title of translation:东江流域敌敌畏的排放量估算及归趋模拟 Authors:Zhang, Bing (1, 2, 3, 4); Zhang, Qian-Qian (2, 3); Ying, Guang-Guo (2, 3) Author affiliation:(1) State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China; (2) Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, South China Normal University, Guangzhou; 510006, China; (3) School of Environment, South China Normal University, Guangzhou; 510006, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Zhang, Qian-Qian(qianqian.zhang@m.scnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:127-135 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The application of pesticides and their constant inputs have resulted in the universal contamination of the environments within watersheds, and it is essential to assess the level of contamination. Compared with traditional monitoring methods, models coupled with GIS show more obvious advantages. However, the difficult access to application scenarios and emission data of pesticides hinder the modeling and assessment of the pesticides used in watersheds. We established an emission estimation method of pesticides, which was based on the planting scenarios and pesticide application standards of different crops in administered regions and by situational analysis and mathematical deduction, the usage of each sub-basin was able to be derived. Then, by using the aforementioned results as source input data, a semi-distributed watershed hydrological, SWAT (soil and water assessment tool) model, was used to simulate the fate of dichlorvos in the Dongjiang River watershed as an example. The verification results show that the comparisons of magnitude between the simulation and the observations were almost within 1, indicating that the SWAT model, which is based on a source input estimation, was able to assess the environmental fate of pesticides in watershed effectively. Also, the modeling results indicated that the annual emission load of the dichlorvos in the watershed accounted for 3.72% of the usage. Moreover, the losses due to degradation and other reactions within the channels reach 2.35%. Most reaches of the Dongjiang River watershed have mass concentrations over 0.1 μg•L-1, demonstrating that certain safety concerns exist.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:River pollution Controlled terms:Estimation - Pesticides - Rivers - Watersheds Uncontrolled terms:Application scenario - Emission estimation - Environmental fate - Mass concentration - Monitoring methods - Pesticide applications - Soil and Water assessment tools - Verification results Classification code:444.1 Surface Water - 453 Water Pollution - 803 Chemical Agents and Basic Industrial Chemicals - 921 Mathematics Numerical data indexing:Mass_Density 1.00e-07kg/m3 to 2.20e-02kg/m3, Percentage 2.35e+00%, Percentage 3.72e+00% DOI:10.13227/j.hjkx.202005160 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003462 Title:Source and Health Risk Assessment of PM2.5-Bound Metallic Elements in Road Dust in Zibo City Title of translation:淄博市道路尘细粒子载带金属元素的来源与健康风险评价 Authors:Guo, Qing-Yuan (1, 2); Bai, Wen-Yu (2); Zhao, Xue-Yan (2); Guo, Li-Yao (2); Wang, Xin-Hua (2); Geng, Chun-Mei (2); Wang, Xiao-Li (1); Wang, Jing (2); Yang, Wen (2); Bai, Zhi-Peng (2) Author affiliation:(1) College of Environmental Science & Safety Engineering, Tianjin University of Technology, Tianjin; 300384, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding authors:Wang, Xiao-Li(tjutwxl@163.com); Wang, Jing(wangjing@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1245-1254 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the pollution characteristics, sources, and ecological and health risk of PM2.5-bound metallic elements in road dust in Zibo City, a total of 97 dust samples were collected in eight districts between October 2016 and May 2017, and particles smaller than 2.5 μm were suspended filtered using a resuspension system. Inductively coupled plasma mass spectrometry (ICP-MS) and optical emission spectrometry (ICP-OES) were used to investigate 18 metal elements within the dust samples. The results showed that the mass fraction of Ca [ω(Ca)] was highest with an average of 120 307.7 mg•kg-1, which was 7.2 times higher than the soil background values for Shandong Province. The mean values of ω(Zn), ω(Cu), ω(Sb), and ω(Cd) were 13.9, 11.7, 13.3, and 29.6 times higher than the background values, respectively. The geo-accumulation index (Igeo) indicated high levels of Cd, Zn, Cu, and Sb pollution, especially in winter. Enrichment factors (EFs) also indicated high concentrations of Cd, Zn, Sb, and Cu in the road dust, which were notably affected by human activities. Principal component analysis (PCA) showed that biomass combustion, coal burning, vehicle emissions, iron and steel smelting, and soil dust are the five main sources of metal elements in road dust in Zibo City. The potential ecological risk of Cd and the total potential risk were extremely high during three seasons and was highest in winter. Health risk assessment showed that As and Pb had a non-carcinogenic risk for children, while Cr presents a carcinogenic risk. In conclusion, pollution from PM2.5-bound metallic elements in road dust in Zibo City is derived from anthropogenic sources and is most severe during winter. Importantly, the levels of pollution detected represent potential ecological risk as well as some non-carcinogenic and carcinogenic risks for children. Therefore, the source control of road dust requires particular attention.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Risk assessment Controlled terms:Air pollution - Coal combustion - Coal dust - Health - Health risks - Inductively coupled plasma mass spectrometry - Metals - Optical emission spectroscopy - Roads and streets - Smelting Uncontrolled terms:Anthropogenic sources - Biomass combustion - Carcinogenic risk - Enrichment factors - Geo-accumulation index - Inductively coupled plasma mass spectrometries (ICPMS) - Optical emission spectrometry - Potential ecological risk Classification code:406.2 Roads and Streets - 451 Air Pollution - 461.6 Medicine and Pharmacology - 461.7 Health Care - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 533.2 Metal Refining - 801 Chemistry - 914.1 Accidents and Accident Prevention - 941.4 Optical Variables Measurements Numerical data indexing:Size 2.50e-06m DOI:10.13227/j.hjkx.202007176 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582250 Title:Characteristics of Pollutant Dynamics Under Rainfall-Runoff Events in the Chaohe River Watershed Title of translation:潮河流域降雨径流事件污染物输出特征 Authors:Bao, Xin (1, 2); Jiang, Yan (1, 2); Hu, Yu-Cong (1, 2) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Jiang, Yan(yanjiang@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3316-3327 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In semi-arid and semi-humid areas, the occurrence of non-point source nutrient pollution is mainly driven by rainfall-runoff events, and nutrient loss under rainfall events determines annual total pollution load. Therefore, research on riverine nutrient dynamics under rainfall-runoff events in flood seasons is critical for simulating and controlling pollution load in semi-arid and semi-humid areas. The Chaohe River watershed, upstream watershed of Miyun Reservoir in Beijing was considered as study area, water quantity and quality of rainfall-runoff process at Gubeikou and Xiahui stations were monitored synchronously in flood seasons in 2018 and 2019. The results indicated the following: ① Among the three rainfall events (E1, E2, and E3), E1 had the highest precipitation and rainfall intensity, and the corresponding discharge and pollutant concentrations were the highest. ② Under different rainfall events, the pollutant concentrations and their variations were different. The variations of concentrations of total nitrogen (TN), ammonia (NH4+-N), nitrate (NO3--N), total phosphorus (TP), and total suspended solids (TSS) were similar to the discharge process under the heavy rainstorm event (E1) and the rainstorm event (E3). The concentrations of total nitrogen (TN), ammonia (NH4+-N), total phosphorus (TP), and total suspended solids (TSS) were similar to the discharge process under the heavy rain events (E2), but the variations of nitrate (NO3--N) concentrations were opposite to those in the discharge process. ③ The concentrations and variations of different forms of pollutants were different under different rainfall events. Under the event of strong rainfall erosion (E1 and E2), the concentrations of particulate pollutants varied significantly, being positively correlated with that of total suspended solids (TSS). For the rainfall event that did not cause soil erosion (E3), the forms of nitrogen and phosphorus were dominated by total dissolved nitrogen (TDN) and total dissolved phosphorus (TDP) respectively, whose variations were mainly related to discharge. ④ The discharge and pollutant concentrations at each station varied under different rainfall events. Heavy rainfall erosion was more obvious at Gubeikou station, causing significant variations in discharge, TP, and TSS. Therefore, these results can be used to determine migration patterns of non-point source pollutants caused by rainfall-runoff events and provide references for water quality prediction and control in flood seasons.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Rain Controlled terms:Ammonia - Erosion - Floods - Nitrates - Nutrients - Phosphorus - Quality control - Reservoirs (water) - River pollution - Runoff - Storms - Water quality - Watersheds Uncontrolled terms:Nitrogen and phosphorus - Non-point source pollutants - Pollutant concentration - Rainfall-runoff events - Rainfall-runoff process - Total dissolved phosphorus - Total suspended solids - Water quality predictions Classification code:441.2 Reservoirs - 443.3 Precipitation - 444.1 Surface Water - 445.2 Water Analysis - 453 Water Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.202009181 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688830 Title:Distribution Characteristics of Antibiotics and Antibiotic Resistance Genes in Wastewater Treatment Plants Title of translation:某市污水厂抗生素和抗生素抗性基因的分布特征 Authors:Xie, Ya-Wei (1); Yu, Chi-Sheng (2); Li, Fei-Fei (3); Yao, Peng-Cheng (4); Liu, Hong-Yuan (1) Author affiliation:(1) College of Civil Engineering, Zhejiang University of Technology, Hangzhou; 310023, China; (2) College of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China; (3) School of Water Resource and Environment, China University of Geoscience, Beijing; 100083, China; (4) School of Environmental and Geographical Sciences, Shanghai Normal University, Shanghai; 200234, China Corresponding author:Liu, Hong-Yuan(lhyzyy@zjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:315-322 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Antibiotics and antibiotic resistance genes (ARGs) are highly concerning emerging polltants. Wastewater treatment plants (WWTPs) are considered to be one of the most important anthropogenic sources of antibiotics and ARGs in the environment. Six WWTPs of a city were selected to investigate the antibiotics and ARGs in the influents and effluents, respectively. In total, 73 kinds antibiotics belonging to 7 classes were detected in WWTPs. The total concentration of those antibiotics ranged between 490.2-2 288.6 ng•L-1, and ofloxacin, maprofloxacin, and roxithromycin were the most frequently detected antibiotics in the influents. A dramtic difference was observed in the antibiotic removal efficiency among the WWTPs, and the total antibiotic concentration in the effluents ranged between 260.2-1 464.3 ng•L-1. Macrolides and quinolones are the main classes in the effluents, and the antibiotic concentration in the effluents was higher than that in the influents. Ten kinds of ARGs were detected in the WWTPs. Among these, sulⅠ was the most widely prevalent with an absolute abundance of 2.4×105-5.4×106 copies•mL-1. No significant difference in ARG abundance was observed between industrial wastewater and domesic wastewater. Furthermore, the correlation between ARG abundance and antibiotic concentrations weakened after treatment in the WWTPs.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Sewage treatment plants Controlled terms:Antibiotics - Effluents - Genes - Sewage pumping plants - Wastewater treatment - Water treatment plants Uncontrolled terms:After-treatment - Anthropogenic sources - Antibiotic concentration - Antibiotic removal - Antibiotic resistance genes - Distribution characteristics - Industrial wastewaters - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology Numerical data indexing:Mass_Density 2.89e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 4.64e-07kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202005304 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126218 Title:Major Ionic Characteristics and Factors of Karst Groundwater at Huixian Karst Wetland, China Title of translation:会仙岩溶湿地地下水主要离子特征及成因分析 Authors:Li, Jun (1, 2, 3); Zou, Sheng-Zhang (1, 3); Zhao, Yi (1, 3); Zhao, Rui-Ke (4); Dang, Zhi-Wen (2); Pan, Min-Qiang (5); Zhu, Dan-Ni (1, 3); Zhou, Chang-Song (1, 3, 6) Author affiliation:(1) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources, Hebei University of Architecture, Zhangjiakou; 075000, China; (3) International Research Center on Karst under the Auspices of United Nations Educational, Scientific and Cultural Organization, Guilin; 541004, China; (4) Hebei Bureau of Geology 9th Geological Brigade, Xingtai; 054000, China; (5) Zhangjiakou Ecological Environment Monitoring Center of Hebei Province, Zhangjiakou; 075000, China; (6) School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou; 221116, China Corresponding authors:Zhu, Dan-Ni(zdanni16@karst.ac.cn); Zhou, Chang-Song(changsongzhou@karst.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1750-1760 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the major ionic chemical characteristics and seasonal variations, 27 groundwater samples were collected from the wet season, flat season, and dry season during 2018-2019 in the Huixian Karst wetland, which is the largest low-altitude karst wetland in China. The single pollution standard index was applied to evaluate the groundwater pollution during different periods, and the major ionic factors of the karst groundwater were analyzed using the statistical analysis method, Gibbs diagram, and ion ratio. The results revealed that the groundwater samples were a weakly alkaline fresh water that were rich in Ca2+ and HCO3-. The average concentrations of the primary ions followed the order of flat season>wet season>dry season; meanwhile, the water quality in the dry season was better than that in the wet and flat seasons. The K+ and NO3- in the karst groundwater were mostly affected by the spatial distributions of the aquifers, and the Mg2+, SO42-, NO2-, NH4+, and TDS were related to the space-season scale. Na+, Ca2+, HCO3-, and Cl- were relatively stable ions in the karst groundwater. The hydrochemical characteristics were primarily determined by carbonate rock dissolution and were found to be the HCO3-Ca type, which accounted for 77.78%, 77.78%, and 88.89% in the wet season, flat season, and dry season, respectively. The karst groundwater was predominantly polluted by SO42-, NO3-, and NO2-; particularly, NO3- exhibited serious pollution points, and SO42- had heavy pollution points in the wet and flat seasons. The chemical composition of the karst groundwater was controlled mostly by water-rock interactions. Ca2+ and HCO3- primarily came from calcite dissolution, and the high concentrations of Mg2+ and SO42- in a few number of points were controlled by dolomite, dolomitic limestone, and pyrite. K+, Na+, SO42-, NO3-, and Cl- partly came from atmospheric precipitation, and Na+ and Cl- partly came from human activities; K+ was related to potash fertilizer, and the main source of NO3- was chemical fertilizer.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Groundwater pollution Controlled terms:Alkalinity - Aquifers - Calcite - Dissolution - Drought - Groundwater resources - Hydrochemistry - Hydrogeology - Ions - Lime - Nitrogen oxides - Potash - Potassium fertilizers - Pyrites - Water quality - Wetlands Uncontrolled terms:Atmospheric precipitation - Average concentration - Chemical characteristic - Chemical compositions - Hydrochemical characteristics - Ionic characteristics - Statistical analysis methods - Water rock interactions Classification code:444 Water Resources - 444.2 Groundwater - 445.2 Water Analysis - 481.1 Geology - 481.2 Geochemistry - 801.1 Chemistry, General - 802.3 Chemical Operations - 804.2 Inorganic Compounds Numerical data indexing:Percentage 7.78e+01%, Percentage 8.89e+01% DOI:10.13227/j.hjkx.202009027 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247636 Title:Adsorption Properties of Oiltea Camellia Shell-Modified Biochar and Effects of Coupled Waterlogging on Soil Cd Morphology Title of translation:油茶果壳改性生物炭吸附性能及其耦合淹水对土壤Cd形态影响 Authors:Cai, Tong (1, 2); Du, Hui-Hui (1, 2); Liu, Xiao-Li (1, 2); Tie, Bo-Qing (1, 2); Yang, Yu (1) Author affiliation:(1) College of Resources and Environment, Hunan Agricultural University, Changsha; 410128, China; (2) Technology and Research Center for Irrigation Water Resource and Quality Purification of Hunan Province, Changsha; 410128, China Corresponding author:Liu, Xiao-Li(zzhxxll@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2522-2530 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Using oiltea camellia shells, a typical agricultural waste, in Hunan as feedstock, Na2SiO3 solution was used to impregnate oiltea camellia shells and modified biochar was prepared under oxygen-limited conditions. We have studied the adsorption efficiencies of Cd in solution by different biochars and the resistance efficiencies of Cd activity in soil by biochars coupled with flooding. Scanning electron microscopy, Brunauer-Emmett-Teller analysis, and Fourier transform infrared spectroscopy were used to reveal the physicochemical properties of the biochars. The results showed that compared with the camellia oil shell biochar, the modified camellia oil shell biochar (MBC) obtained more special surface areas and functional groups, which showed stronger adsorptive capacities for Cd. A waterlogging soil incubation experiment showed that flooding could simultaneously increase the soil pH values and decrease the acid-soluble Cd component. More available Cd was transformed into the residual state as the flooding time increased, and biochar addition coupled with flooding could lead to further improvement of acid-soluble Cd transformation to the residual state and reduce the acid-soluble Cd content. The concentration of acid-soluble Cd was significantly negatively correlated with the increase in biochar dosage. At 60 d of flooding, the acid-soluble Cd content was 0.33 mg•kg-1 (a decreased amplitude of approximately 45.0%) in 5.0% additional of MBC disposal. Thus, sodium silicate-modified biochar is a novel and effective material for the remediation of Cd-contaminated water and soil, and the research results provide a reference for the resource recovery of Camellia oleracea organic waste.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Cadmium Controlled terms:Agricultural robots - Agricultural wastes - Efficiency - Floods - Fourier transform infrared spectroscopy - Morphology - Physicochemical properties - Scanning electron microscopy - Shells (structures) - Silicates - Sodium compounds - Soils - Water pollution Uncontrolled terms:Adsorption efficiency - Adsorption properties - Adsorptive capacity - Brunauer Emmett Teller analysis - Contaminated water - Effective materials - Resource recovery - Special surface area Classification code:408.2 Structural Members and Shapes - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801 Chemistry - 821.5 Agricultural Wastes - 913.1 Production Engineering - 951 Materials Science Numerical data indexing:Percentage 4.50e+01%, Percentage 5.00e+00% DOI:10.13227/j.hjkx.202009207 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804515 Title:Diversity and Abundance of Antibiotic Resistance Genes in Tailings Ponds Title of translation:尾矿库水体环境抗生素抗性基因的分布特征 Authors:Huang, Fu-Yi (1, 2); Zhu, Yong-Guan (1, 2); Su, Jian-Qiang (1, 2) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Su, Jian-Qiang(jqsu@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:761-765 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Antibiotic resistance genes (ARGs) are considered emerging contaminants posing an increasing threat to the ecological environment and global human health. Profiling ARGs in tailings ponds is essential to better understand their spatial and temporal dynamics. In this study, high-throughput quantitative polymerase chain reaction (PCR) techniques were used to investigate the occurrence, diversity, abundance, and distribution of ARGs in a tailings pond. A total of 97, 52, 44, and 56 ARGs were detected in WK0, WK1, WK2, and HS, respectively, with 11, 6, 3, and 6 mobile genetic elements (MGEs) also being detected, respectively. The absolute abundance of ARGs in the pond water ranged from 6.39×107 to 1.75×108 copies•L-1. Additionally, the abundance of MGEs were higher than ARGs in WK1 and WK2, indicating the potential for horizontal gene transfer (HGT). Furthermore, Cu, TOC, and MGEs were significantly associated with ARGs. Indeed, redundancy analysis (RDA) revealed that Cu, TOC, and MGEs explained 61.64% of the alteration of the ARG profiles, implying their potential roles in the spread and evolution of ARGs in tailings ponds.
© 2021, Science Press. All right reserved. Number of references:25 Main heading:Polymerase chain reaction Controlled terms:Antibiotics - Binary alloys - Gene transfer - Genes - Health risks - Lakes Uncontrolled terms:Antibiotic resistance genes - Ecological environments - Emerging contaminant - Genetic elements - Horizontal gene transfer - Quantitative polymerase chain reaction - Redundancy analysis (RDA) - Temporal dynamics Classification code:461 Bioengineering and Biology - 801.2 Biochemistry Numerical data indexing:Percentage 6.16e+01% DOI:10.13227/j.hjkx.202008051 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126241 Title:Spatiotemporal Distributions and Ecological Risk Assessments of Typical Antibiotics in Surface Water of Taihu Lake Title of translation:太湖表层水体典型抗生素时空分布和生态风险评价 Authors:Ding, Jian-Nan (1); Liu, Shu-Jiao (1); Zou, Jie-Ming (1); Shi, Jun-Zhe (2); Zou, Hua (1); Shi, Hong-Xing (3) Author affiliation:(1) School of Environmental and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Wuxi Environmental Monitoring Center, Wuxi; 214000, China; (3) State Key Laboratory of NBC Protection for Civilian, Beijing; 102205, China Corresponding authors:Zou, Hua(zouhua@jiangnan.edu.cn); Shi, Hong-Xing(shihongxing18@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1811-1819 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Using solid phase extraction-high performance liquid chromatography tandem mass spectrometry, antibiotics belonging to four classes (i.e. sulfonamides, quinolones, tetracycline, and macrolides) in the surface water of Taihu Lake were monitored monthly for a year. Moreover, the potential ecological risks of antibiotics in Taihu Lake were assessed. During the one-year monitoring, all the eighteen target antibiotics were detected to some extent in the surface water. The detection rates of five sulfonamides (sulfamethoxazole, sulfathiazole, sulfadiazine, sulfadimethazine, and trimethoprim) were higher than 50%. The concentrations of quinolones in the surface water were relatively higher. The average and medium concentrations of ciprofloxacin were 13.0 ng•L-1and 13.5 ng•L-1, respectively. There were significant differences in the antibiotic pollution during the different months, with the average concentrations of the target antibiotics ranging from 7.3 to 33.5 ng•L-1. The concentration levels were lower from June to October, while higher concentrations were observed from February to May and in November. In the surface water of Taihu Lake, the spatial variations of antibiotics among the 20 sampling sites were not significant, with the average concentrations ranging from 13.0 to 14.3 ng•L-1. During the one-year monitoring, the rates of medium and high risks that the antibiotics posed to algae reached 57.5%. The ecological risks of antibiotics were more severe in April and November, and the quinolones may be the dominant risk factor. This issue should be carefully considered by management authorities.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Antibiotics Controlled terms:Amides - High performance liquid chromatography - Lakes - Mass spectrometry - Phase separation - Risk assessment - River pollution - Sulfur compounds Uncontrolled terms:Average concentration - Concentration levels - Ecological risk assessment - High-performance liquid chromatography tandem mass spectrometries - Potential ecological risk - Solid-phase extraction - Spatial variations - Spatiotemporal distributions Classification code:453 Water Pollution - 461.6 Medicine and Pharmacology - 641.1 Thermodynamics - 801 Chemistry - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.30e-08kg/m3 to 1.43e-08kg/m3, Mass_Density 1.35e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 7.30e-09kg/m3 to 3.35e-08kg/m3, Percentage 5.00e+01%, Percentage 5.75e+01% DOI:10.13227/j.hjkx.202009082 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247473 Title:Effects of Long-Term Application of Chemical Fertilizers and Organic Fertilizers on Heavy Metals and Their Availability in Reddish Paddy Soil Title of translation:长期施用化肥和有机肥对稻田土壤重金属及其有效性的影响 Authors:Xia, Wen-Jian (1); Zhang, Li-Fang (1); Liu, Zeng-Bing (1); Zhang, Wen-Xue (1); Lan, Xian-Jin (1); Liu, Xiu-Mei (1); Liu, Jia (1); Liu, Guang-Rong (1); Li, Zu-Zhang (1); Wang, Ping (1) Author affiliation:(1) Institute of Soil Fertilizer and Resource Environment, Jiangxi Academy of Agricultural Sciences, National Engineering and Technology Research Center for Red Soil Improvement, Yichun Scientific Observing and Experimental Station of Agro-environment, Nanchang; 330200, China Corresponding author:Liu, Guang-Rong(lgrtfs@vip.sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2469-2479 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the effects of long-term fertilization on the accumulation and availability of heavy metals in reddish paddy soil and to analyze the major influencing factors, soil samples were collected after the later rice was harvested in 2018 from a long-term fertilization field experiment that began in 1984. Six treatments were selected, namely CK (control without fertilization), PK (P and K fertilizer), and NPK (N, P, and K fertilizer), and different proportions of organic fertilizer plus chemical fertilizer (M1NPK: 30%M+70%NPK; M2NPK: 50%M+50%NPK; and M3NPK: 70%M+30%NPK), soil chemical properties, total and available heavy metal contents, and the relationships between the available forms of heavy metals and soil chemical parameters and total heavy metals (THM) were analyzed. The results showed that ① long-term fertilization changed the soil chemical properties; compared with those of CK, PK significantly increased the contents of soil available phosphorus (AP) and available potassium (AK), NPK significantly increased the soil organic matter (SOM), cation exchange capacity (CEC), AP, and AK, and the organic fertilizer treatments significantly increased the contents of SOM, CEC, AP, AK, and nitrate (NO3--N). ② There were slight variations in the THM contents under the chemical fertilizer treatments (PK and NPK), whereas the organic fertilizer treatments significantly increased the total contents of Cu, Zn, and Cd. ③ The chemical fertilizer treatments significantly increased the available Cr and As, whereas the organic fertilizer treatments significantly increased the available Cu, Zn, Cr, Cd, As, and Fe. ④ There were significant positive correlations between the available Cu, Zn, Cr, Cd, As, and Fe and the SOM, CEC, AP, and NO3--N. In addition, the available Zn and Cd were significantly positively correlated with the soil pH, whereas the available Pb was significantly negatively correlated with soil pH, SOM, CEC, and NO3--N. ⑤ There were significant positive correlations between the available and total contents of Cu, Zn, and Cd, whereas there were significant negative correlations between the available and total contents of Cr and Fe. ⑥ Redundancy analysis showed that SOM and pH accounted for 80.7% and 5.5% of the variation in THM, whereas the soil CEC, AP, and pH accounted for 81.1%, 4.9%, and 3.3% of the variation in the available heavy metals, respectively. ⑦ The partial least squares path model analysis showed that the path coefficients of the THM, CEC, and AP on the available state of heavy metals were 0.459, 0.417, and 0.293, respectively. Long-term application of organic manure, such as pig manure, significantly improved the soil chemical properties and affected the availability of heavy metals, and soil CEC and AP may play key roles in regulation.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Fertilizers Controlled terms:Chromium - Heavy metals - Least squares approximations - Mammals - Manures - Metal analysis - pH - Silicon compounds - Soil surveys - Soils Uncontrolled terms:Available potassiums - Cation exchange capacities - Different proportions - Long-term fertilization - Negative correlation - Partial least square (PLS) - Positive correlations - Soil chemical property Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 543.1 Chromium and Alloys - 801.1 Chemistry, General - 804 Chemical Products Generally - 821.5 Agricultural Wastes - 921.6 Numerical Methods Numerical data indexing:Percentage 3.30e+00%, Percentage 4.90e+00%, Percentage 5.50e+00%, Percentage 8.07e+01%, Percentage 8.11e+01% DOI:10.13227/j.hjkx.202008094 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003346 Title:Relationships Between Microplastic and Surrounding Soil in an E-Waste Zone of China Title of translation:电子废物拆解区微塑料与周围土壤环境之间的关系 Authors:Chai, Bing-Wen (1); Yin, Hua (1); Wei, Qiang (2); Lu, Gui-Ning (1); Dang, Zhi (1) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Medical Devices Research and Testing Center, South China University of Technology, Guangzhou; 510006, China Corresponding author:Yin, Hua(huayin@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1073-1080 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Microplastic pollution is ubiquitous and has attracted significant public attention. Recent research on microplastic has focused on aquatic environments, but its impacts on soil ecosystems remain poorly understood, especially in e-waste dismantling zones. The objective of this study was to investigate the relationships between microplastic and surrounding soil in abandoned e-waste disassembling plots with different dismantling methods focusing on ecotoxicology and microbiology in Guiyu, Shantou District, Guangdong Province. The surface morphology of collected microplastics showed signs of aging and degradation, possibly due to their long-term exposure in the soil and the original disassembling methods. In addition, there were diverse metal elements at different surface positions of the same microplastic sample based on SEM-EDS analyses, indicating that some metal elements carried by microplastics are derived from the surrounding soil rather than being inherent to the microplastic. Moreover, seven heavy metals (Pb, Cd, Cr, As, Ba, Co, and Ni) inherent in microplastic were identified using ICP-OES, revealing that the concentrations varied in different sampling plots were typically higher than in the surrounding soil. In particular, the concentration of Ba in microplastic was 103 orders of magnitude higher than in soil. Indeed, Ba in the form of BaSO4 is widely used as a filler in numerous plastics. Furthermore, microplastic-associated microorganisms were examined using 16S rRNA sequencing, and the relationships between the top 50 genera of microplastic-bound bacteria and soil environmental factors were analyzed using the Spearman's rank correlation coefficient. Microorganisms primarily originated from the surroundings of microplastics; therefore, environmental factors could directly affect the microbial communities associated with this type of pollutant. Importantly, different dismantling methods were associated with distinct soil environmental factors, and their correlations with microplastic-associated microorganisms also varied.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Microplastic Controlled terms:Aquatic ecosystems - Barite - Barium - Barium sulfate - Electronic Waste - Heavy metals - Microorganisms - Morphology - Pollution - RNA - Soils - Surface morphology - Wastes Uncontrolled terms:16s rrna sequencing - Aquatic environments - Environmental factors - Guangdong Province - Long term exposure - Microbial communities - Orders of magnitude - Spearman's rank correlation coefficients Classification code:454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 549.2 Alkaline Earth Metals - 951 Materials Science DOI:10.13227/j.hjkx.202007245 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247455 Title:Application of Iron and Sulfate-Modified Biochar in Phosphorus Removal from Water Title of translation:铁硫改性生物炭去除水中的磷 Authors:Sang, Qian-Qian (1); Wang, Fang-Jun (1); Zhao, Yuan-Tian (1, 2); Zhou, Qiang (3); Cai, Yu-Qi (1); Deng, Ying (1); Tian, Wen-Qing (1); Chen, Yong-Zhi (1); Ma, Juan (1, 4) Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Jiangsu Provincial Architectural Design & Research Institute Co., Ltd., Nanjing; 210000, China; (4) Gansu Province Wastewater Treatment Industry Technology Center, Lanzhou; 730070, China Corresponding author:Ma, Juan(meggyma@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2313-2323 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The excessive discharge of phosphate into natural water has caused serious environmental problems. Adsorption is an efficient technology for phosphorus removal from water. In this study, a novel biochar modified by chitosan, ferrous sulfate, and sodium sulfide was synthesized and performed well in phosphorus adsorption. The results of batch experiments showed that the optimum synthesized composite could adsorb 49.32 mg•g-1 of phosphate at 298 K. Meanwhile, the simulation results showed better fitting with the pseudo-second-order model and Langmuir model. The adsorption rate was dominated by three-dimensional diffusion within the inner pores. The adsorption process was defined as physic/chemisorption, while the adsorption mechanism was concluded to be electrostatic adsorption, porous filling, surface chemical precipitation, hydrogen binding, and the ligand effect. This study showed that the composite is effective in phosphorus removal from water, and we anticipate that our research will offer guidelines for adsorbent design and reveal the adsorption mechanism.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Chemicals removal (water treatment) Controlled terms:Adsorption - Iron compounds - Phosphorus - Precipitation (chemical) - Sodium sulfide - Sulfur compounds Uncontrolled terms:Adsorption mechanism - Adsorption process - Efficient technology - Electrostatic adsorption - Environmental problems - Phosphorus adsorption - Phosphorus removal - Pseudo-second order model Classification code:802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Temperature 2.98e+02K DOI:10.13227/j.hjkx.202008302 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003258 Title:Seasonal Characteristics of Air Pollutant Sources and Transport Pathways in Xining City Title of translation:西宁市大气污染来源和输送季节特征 Authors:Liu, Na (1); Yu, Ye (2); Ma, Xue-Qian (1) Author affiliation:(1) Qinghai Provincial Key Laboratory of Disaster Prevention and Reduction, Qinghai Weather Modification Office, Xining; 810001, China; (2) Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China Corresponding author:Ma, Xue-Qian(moblflyqxm@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1268-1279 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the analysis of seasonal characteristics of PM10 and PM2.5 particle mass concentrations in Xining from 2016 to 2018, the daily 72 hour backward trajectories were calculated using the hybrid single-particle Lagrangian integrated trajectory (HYSPLIT) model and global data assimilation system (GDAS) data. The main transport pathways of PM10 and PM2.5 were identified and their characteristics were analyzed by clustering analysis for four seasons. The potential source regions and their contributions were defined using the potential source contribution function (PSCF) model and the concentration-weighted trajectory (CWT) method provided by TrajStat software. Results indicated that the sources were mostly distributed in the north-west and north-east regions and heights were low in the surrounding and adjacent areas of Xining. The transport pathways were mainly affected by airflows from the west, northwest, southwest, and east in Xining city. The trajectories with the highest probability of occurrence were characterized by short distance, low height, and slow-moving speed, originated from Qinghai in spring, summer and autumn, but from Xinjiang in winter, and was dominated by intra-provincial transportation. Different transport trajectories had different effects on PM10 and PM2.5 concentrations. Polluted airflows mainly originated from internal sources in Qinghai, external sources in Xinjiang, and foreign sources in the west of Xinjiang, with all the source regions located in deserts or Gobi areas. Obviously seasonal differences existed in the distribution and contribution of the potential source areas, with the widest and largest contribution in winter, followed by spring and autumn, and the smallest in summer. The most important potential source regions were located in northern, central, and eastern Qinghai, and southern, central, and eastern Xinjiang, while the surroundings were potential source regions for medium contribution.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Atmospheric movements Controlled terms:Arid regions - Springs (components) - Trajectories Uncontrolled terms:Clustering analysis - Global data assimilation system - Potential source contribution function models - Potential source regions - Probability of occurrence - Seasonal characteristics - Seasonal differences - Transport trajectories Classification code:443 Meteorology - 443.1 Atmospheric Properties - 444 Water Resources - 601.2 Machine Components Numerical data indexing:Time 2.59e+05s DOI:10.13227/j.hjkx.202007183 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003401 Title:Light-absorbing Properties and Sources of PM2.5 Organic Components at a Suburban Site in Northern Nanjing Title of translation:南京北郊PM2.5中有机组分的吸光性质及来源 Authors:Shang, Yue (1); Yu, Huan (2); Mao, Yu-Hao (1); Wang, Cheng (1); Xie, Ming-Jie (1) Author affiliation:(1) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Department of Atmospheric Sciences, School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China Corresponding authors:Wang, Cheng(wangcheng118@163.com); Xie, Ming-Jie(mingjie.xie@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1228-1235 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The light absorption of organic components in PM2.5 was investigated at a suburban site in northern Nanjing from September 2018 to September 2019, and PM2.5 compositional data and principal component analysis (PCA) were used to identify the sources of light-absorbing organic carbon (brown carbon, BrC). The results showed that the average light absorption coefficients of water-soluble organic carbon (WSOC) and methanol extractable organic carbon (MEOC) were (3.22±2.18) Mm-1 (Abs365, w) and (7.69±4.93) Mm-1(Abs365, m), respectively. Significant correlations were observed between Abs365, w and mass concentrations of WSOC (r=0.72, P<0.01) and between Abs365, m and mass concentrations of MEOC (r=0.62, P=0.04). Both Abs365, w and Abs365, m exhibited seasonal variations, with higher values during winter than during summer, and higher diel variations at night than during the day. This can be attributed to meteorological characteristics during the winter and nighttime, i.e., decreased boundary layer height and increased atmospheric stability, enhanced primary emissions in winter, and stronger photobleaching effects during the summer and during the day. The annual average Abs365, m/Abs365, w ratio (2.60±0.92) was much larger than the average mass ratio of MEOC/WSOC (1.37±0.30), indicating that the water-insoluble fraction of MEOC had a stronger light absorption effect and dominated BrC absorption. No strong correlation (r<0.60) was observed between WSOC, MEOC, Abs365, m, and mass concentrations of K+, indication that biomass burning was not the main source of BrC in the study location. The mass absorption efficiency of WSOC (MAE365, w) and MEOC (MAE365, m) and their ratios (MAE365, m/MAE365, w) showed similar seasonal variations to Abs365. The average MAE365 value of the water-insoluble fraction of MEOC (4.10±5.15) m2•g-1 was 6.0 and 2.9 times higher than that of MAE365, w and MAE365, m, respectively, suggested that BrC absorption was primarily attributable to water-insoluble components. In comparison to the absorption Ångström exponent of WSOC (ÅWSOC), ÅMEOC displayed marked temporal variability, which might be related to the seasonal variation in the emission of water-insoluble chromophores. According to the PCA results, the light absorption of PM2.5 organic was mainly attributed to secondary formation and anthropogenic primary emissions rather than biomass burning.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Water absorption Controlled terms:Atmospheric boundary layer - Boundary layer flow - Bromine compounds - Chromophores - Light absorption - Light sources - Organic carbon - Photobleaching Uncontrolled terms:Absorbing properties - Atmospheric stability - Boundary layer heights - Light absorption coefficients - Mass concentration - Photobleaching effect - Temporal variability - Water-soluble organic carbon Classification code:443.1 Atmospheric Properties - 631.1 Fluid Flow, General - 741.1 Light/Optics - 802.3 Chemical Operations - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202006219 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003361 Title:Gridded Emission Inventories of Major Criteria Air Pollutants and Source Contributions in Lan-Bai Metropolitan Area, Northwest China Title of translation:兰-白城市群主要大气污染物网格化排放清单及来源贡献 Authors:Wang, Wen-Peng (1); Wang, Zhan-Xiang (1); Li, Ji-Xiang (1); Gao, Hong (1); Huang, Tao (1); Mao, Xiao-Xuan (1); Ma, Jian-Min (2) Author affiliation:(1) Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China; (2) College of Urban and Environmental Science, Peking University, Beijing; 100871, China Corresponding author:Gao, Hong(honggao@lzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1315-1327 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Lan-Bai Metropolitan Area in Gansu province is an important heavy-industry base with the highest level of total air pollutant emissions in Northwest China. It is significant to study the high-resolution pollutant emission inventory to forecast regional air quality and to simulate pollutant emission reduction, as well as provide early warnings and forecasts, and to control air pollution. Taking Lanzhou and Baiyin as the main research areas, this study established the gridded emission inventories of seven major criteria air pollutants in the Lan-Bai Metropolitan Area based on emission data and statistical yearbooks of 2015-2016. The spatial pollution characteristics and emission source contributions were also studied. The results showed that the total annual emissions of seven major criteria air pollutants in the Lan-Bai Metropolitan Area were as followings: NOx 2.22×105 t, NH3 4.53×104t, VOCs 7.74×104t, CO 5.62×105 t, PM10 4.95×105 t, PM2.5 1.91×105 t, and SO2 1.37×105 t. Among them, annual CO emissions were the highest, while the annual emissions of NH3 were the lowest. The comparison of this gridded emission inventories with the Peking and Tsinghua University's MEIC inventories, found that the consistency of the three inventories for traffic source was relatively high, but for the total emissions and industrial source emissions of CO, a 30%-40% difference was found when compared with emissions in the Peking and Tsinghua University's inventories. The main differences were from the collected emission factors and the different resolution and years for collected data. The industrial non-combustion process sources, accounting for the largest proportion, were mainly concentrated in urban areas for the other six major criteria air pollutants except for NH3. The main contributing sources of NH3were from the use of nitrogen fertilizers and livestock emissions, so its spatial pollution distribution was mainly affected by farmland distribution and other factors. It can be concluded that countermeasures, such as controlling industrial non-combustion process sources, integrating high-quality and high-efficiency power supply, using clean energy, strict dust emission control on construction sites and industrial production facilities, as well as urban greening could effectively reduce the emissions of six major criteria air pollutants including NOx, VOCs, CO, PM10, PM2.5, and SO2 in the Lan-Bai Metropolitan Area. The reduction of NH3 emission mainly depends on reducing the use of nitrogen fertilizer and controlling livestock emissions in the rural regions of Lan-Bai Metropolitan Area. This paper also used Monte Carlo uncertainty analysis to evaluate uncertainty in the gridded emission inventories, in which the maximum uncertainty was -31%-30% for NH3, the uncertainty of CO at -18%-16% was minimal. Therefore, the overall credibility was high for the established gridded emission inventories in this study.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Process control Controlled terms:Agriculture - Air quality - Ammonia - Combustion - Emission control - Energy efficiency - Green manufacturing - Nitrogen fertilizers - Nitrogen oxides - Sulfur dioxide - Uncertainty analysis - Urban growth Uncontrolled terms:Air pollutant emission - Criteria air pollutants - Different resolutions - Emission inventories - Industrial production - Industrial source emissions - Regional air quality - Source contributions Classification code:403.1 Urban Planning and Development - 451.2 Air Pollution Control - 525.2 Energy Conservation - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 922.1 Probability Theory Numerical data indexing:Percentage -1.80e+01% to 1.60e+01%, Percentage -3.10e+01% to 3.00e+01%, Percentage 3.00e+01% to 4.00e+01% DOI:10.13227/j.hjkx.202007131 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003300 Title:Characteristics and Cause Analysis of Heavy Air Pollution in a Mountainous City During Winter Title of translation:山地型城市冬季大气重污染过程特征及成因分析 Authors:Liu, Zhuo-Cheng (1); Niu, Yue-Yuan (1); Wu, Jing (1); Yan, Yu-Long (1); Hu, Dong-Mei (1); Qiu, Xiong-Hui (1); Peng, Lin (1) Author affiliation:(1) Key Laboratory of Resources and Environmental System Optimization, Ministry of Education, College of Environmental Science and Engineering, North China Electric Power University, Beijing; 102206, China Corresponding author:Wu, Jing(wujing@ncepu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1306-1314 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Taking the typical heavy air pollution process in Yangquan from December 26, 2018 to January 20, 2019 as an example, the characteristics and cause analysis of heavy air pollution in a mountainous city in winter were analyzed in this study. The results showed that fine particle mass (PM2.5) was the primary pollutant during the heavy pollution period. The water-soluble ions and carbonaceous components were the main components of PM2.5. The secondary ions of SO42-, NO3-, and NH4+ had the lager contribution to water-soluble ions (87.7%), and the secondary organic carbon (SOC) was the main component of the carbonaceous components (71.6%). The concentration of the secondary ions during the heavy pollution period increased by 5.3 times compared to levels before the heavy pollution period, and was an important component resulting in the fast increase of PM2.5. An analysis of meteorological conditions showed that PM2.5 and its main components had a significantly positive relationship with humidity and a significantly negative relationship with wind speed. And that pollution became stronger with an increase in humidity and a decrease in wind speed. The typical meteorological characteristics of mountainous cities are high relative humidity and large temperature variations, which can accelerate the formation of secondary pollutants and are the main reasons for the rapid aggravation of PM2.5. In addition, the lower average wind speed caused by the relatively closed terrain in mountainous cities makes the diffusion conditions of air pollutants relatively poor, which is one of the reasons for the accumulation of pollutants. The source apportionment results showed that the secondary sources (46.0%) were the most important source of PM2.5, followed by coal combustion (32.6%), vehicle exhaust (19.8%), and fugitive dust (1.6%). Therefore, mountainous cities should pay more attention to controlling secondary components, especially secondary ions.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Air pollution Controlled terms:Coal combustion - Coal dust - Ions - Organic carbon - Secondary emission - Wind Uncontrolled terms:Carbonaceous components - High relative humidities - Large temperature variations - Meteorological condition - Primary pollutants - Secondary components - Secondary organic carbons (SOC) - Source apportionment Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.1 Organic Compounds Numerical data indexing:Percentage 1.60e+00%, Percentage 1.98e+01%, Percentage 3.26e+01%, Percentage 4.60e+01%, Percentage 7.16e+01%, Percentage 8.77e+01% DOI:10.13227/j.hjkx.202009138 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804535 Title:Nonlinear Response Characteristics and Control Scheme for Ozone and Its Precursors Based on Orthogonal Experimental Methods Title of translation:基于正交试验的臭氧及其前体物的非线性响应及控制方案 Authors:Li, Guang-Yao (1); Chen, Qiang (1); Guo, Wen-Kai (1); Zhang, Rui-Xin (1); Xia, Jia-Qi (1) Author affiliation:(1) Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou; 730000, China Corresponding author:Chen, Qiang(chenqqh@lzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:616-623 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:There is a highly nonlinear relationship between ozone concentrations and its precursor emissions in different regions and at different times, which makes developing effective prevention and control measures difficult. An orthogonal experimental method was introduced to assess the influence of ozone precursors and their interactions on ozone formation, clarify the sensitivity of ozone generation, and propose an optimal control scheme. Based on the WRF-Chem air quality model and an emission inventory of air pollutants in Wuhai City in 2018, this study used an ozone pollution event in the Haibowan urban area (August 17 to 20 2018) to investigate the nonlinear response of ozone formation to its precursors. The orthogonal experiment shows that NOx, VOCs interactions with CO, CO, and interactions between pollutants and meteorological factors are the main factors affects ozone concentrations in the Haibowan urban area. Ozone generation was most sensitive to NOx concentrations during the hours 12:00-18:00 when standard values were exceeded. The ozone concentrations decreased significantly by 12.6 μg•m-3 (7.8%) as NOx, VOCs, and CO were reduced by 60%, 30%, and 30%, respectively. Through the analysis of chemical reaction mechanisms, it is concluded that VOCs and CO affect the photochemical reaction by reacting with •OH, HO2• and other free radicals, which causes the significant interaction between VOCs and CO in the generation of ozone. This method provides a new approach for researching the nonlinear response of ozone formation to its precursors and for proposing ozone pollution control schemes.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Ozone Controlled terms:Air quality - Chemical analysis - Free radicals - Nitrogen oxides - Photochemical reactions - Pollution control Uncontrolled terms:Air quality modeling - Experimental methods - Meteorological factors - Non-linear relationships - Optimal control scheme - Orthogonal experiment - Ozone and its precursors - Prevention and controls Classification code:451.2 Air Pollution Control - 741.1 Light/Optics - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 3.00e+01%, Percentage 6.00e+01%, Percentage 7.80e+00% DOI:10.13227/j.hjkx.202007026 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582294 Title:Hydro-chemical Characteristics and Ion Origin Analysis of Surface Groundwater at the Shengjin Lake and Yangtze River Interface Title of translation:升金湖河湖交汇区地表-地下水水化学特征及成因分析 Authors:Cui, Yu-Huan (1); Wang, Jie (2); Liu, You-Cun (3); Hao, Shuang (1); Gao, Xiang (1) Author affiliation:(1) School of Science, Anhui Agricultural University, Hefei; 230036, China; (2) College of Resources and Environmental Engineering, Anhui University, Hefei; 230039, China; (3) School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou; 341000, China Corresponding author:Wang, Jie(wangjie@ahau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3223-3231 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The interface between Shengjin Lake and Yangtze River was selected as the study area. The water chemical composition and hydrogen and oxygen isotope values of different types of water bodies were tested, and their seasonal variation characteristics were analyzed to explore the sources of chemical ions in the surface and groundwater. Finally, the contribution of mixed water sources to chemical ions in groundwater was estimated. The results show the following ① The concentration of chemical ions in the surface and groundwater of the study area is higher than that of atmospheric precipitation, and the physical and chemical parameters exhibit seasonal variation. ② Surface water mainly belongs to the Ca-HCO3 type, but the proportion of the Ca-SO4 type in summer is significantly lower than that in other seasons; Groundwater primarily belongs to Ca-HCO3 and Ca-SO4 types, with proportions of 46% and 27%, respectively, and the seasonal difference is not significant. ③ Ca2+ and Mg2+ in the surface and groundwater mainly come from the dissolution of carbonate rocks, carbonic acid and sulfate ions participate in the dissolving process of carbonate minerals. Na+and Cl- are partly derived from atmospheric precipitation and partly sourced from agricultural fertilization and manure sewage. ④ Mixed water sources is also an important source of chemical ions in groundwater, with the average contribution 28% to Cl-, showing a seasonal trend.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Hydrochemistry Controlled terms:Agricultural robots - Atmospheric chemistry - Calcium compounds - Carbon dioxide - Chemical analysis - Fertilizers - Groundwater - Ions - Lakes - Sewage - Sulfate minerals Uncontrolled terms:Agricultural fertilization - Atmospheric precipitation - Chemical compositions - Dissolving process - Hydrochemical characteristics - Oxygen isotope values - Physical and chemical parameters - Seasonal differences Classification code:443.1 Atmospheric Properties - 444.2 Groundwater - 452.1 Sewage - 481.2 Geochemistry - 482.2 Minerals - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.70e+01%, Percentage 4.60e+01% DOI:10.13227/j.hjkx.202012016 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650993 Title:Microbial Community Structure of Activated Sludge and its Response to Environmental Factors Title of translation:活性污泥微生物群落结构及与环境因素响应关系分析 Authors:Ma, Qie-Qie (1); Yuan, Ling-Jiang (1, 2); Niu, Ze-Dong (1); Zhao, Jie (1); Huang, Chong (1) Author affiliation:(1) Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an; 710055, China Corresponding author:Yuan, Ling-Jiang(yuanlinjiang@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3886-3893 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
By mining and analyzing the published 16S rRNA amplification data of activated-sludge from 32 sewage and waste-water treatment facilities, at home and abroad, this study examines the microbial structure of sludge and its response to inflow water quality, temperature, and treatment type. Activated sludge generally shows high species diversity and community richness. Many activated sludge samples contain different microbial community structures. In these samples, the dominant bacteria included Thauera, Nitrospira, Comamonas, Dechloromonas, Rhodoferax, Aquihabitans, and Acidovorax. Temperature was negatively correlated with several key denitrifying microorganisms, such as Nitrospira, Aquihabitans, Terrimonas, and Dechloromona. When temperatures were lower than 15℃, the corresponding removal rates of TN and NH4+-N in the 32 sewage treatment plants only reached 49.67% and 63.19%, respectively. With higher BOD5/COD values, these sewage treatment systems exhibited improved biodegradability performances. With higher relative abundances of advantageous functional bacteria, such as Zoogloea, Arcobacter, Acidovorax, and Acinetobacter, pollutant-removal rates would increase accordingly. As for domestic-sewage treatments, the performance of the A2O process is superior to that of the OD, CAS, and CMAS processes. Additionally, the relative abundances of multiple functional dominant bacteria, including Comamonas, Rhodoferax, Nitrospira, and Novosphingobium, were significantly higher in sludge treated with the A2O process than in sludge treated with the other three processes.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Sewage treatment plants Controlled terms:Bacteria - Biodegradability - RNA - Sewage - Waste treatment - Wastewater treatment - Water quality - Water treatment Uncontrolled terms:Denitrifying microorganisms - Domestic sewage treatment - Environmental factors - Functional bacteria - Microbial community structures - Microbial structures - Relative abundance - Treatment systems Classification code:445.1 Water Treatment Techniques - 445.2 Water Analysis - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 801.2 Biochemistry Numerical data indexing:Percentage 4.97e+01%, Percentage 6.32e+01% DOI:10.13227/j.hjkx.202012191 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405108 Title:Spatio-Temporal Evolution Characteristics and Source Apportionment of O3 and NO2 in Shijiazhuang Title of translation:石家庄市臭氧和二氧化氮的时空演替特征及来源解析 Authors:Wang, Shuai (1); Nie, Sai-Sai (1); Feng, Ya-Ping (1); Cui, Jian-Sheng (1); Chen, Jing (2); Liu, Da-Xi (1); Shi, Wen-Ya (2) Author affiliation:(1) School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China; (2) Shijiazhuang Meteorological Bureau, Shijiazhuang; 050081, China Corresponding authors:Cui, Jian-Sheng(cui1603@163.com); Liu, Da-Xi(daxidaxi2@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2679-2690 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Ground-level O3, NO2, and meteorological (temperature, humidity, wind speed, precipitation, and sunshine duration) data from 18 counties in Shijiazhuang City from 2014 to 2017, and volatile organic compounds (VOCs) data for Summer 2017, were analyzed to explore the spatial patterns, evolution, influencing factors, and source apportionment of O3 and NO2 in Shijiazhuang City. Network analysis and inverse distance weighted (IDW) spatial autocorrelation and backward trajectories analyses were performed. The results indicate that O3 concentrations increased between 2014 and 2017, and monthly variations showed a unimodal trend. The typical period of peak O3 pollution (O3≥160 μg•m-3) was from May to September, characterized by high temperatures, low humidity, weak winds, and strong solar radiation. The O3 concentrations were negatively correlated with the NO2. Furthermore, O3 concentrations increased year-on-year since 2015 in main urban area, and the dominant pollutant type had changed from NO2 (2014 to 2016) to VOCs (2016 and 2017). However, the O3 concentration of county-areas limited by the VOCs. The main factors affecting O3 concentrations were industry, agriculture, economy, and population, and centers of O3 pollution associated with secondary industry appeared in the main urban areas of Shijiazhuang and Luancheng. Moreover, VOCs trajectories during the summer monitoring period were clustered in three source directions: (A) East-northeast, 26.67%; (B) Northwest-west, 43.33%; and (C) Southeast-south, 30%). Trajectories (A) and (C) were the dominant directions of VOC transmission (east-southeast).
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Nitrogen oxides Controlled terms:Agricultural robots - Pollution - Trajectories - Volatile organic compounds - Wind Uncontrolled terms:Backward trajectory - Inverse distance weighted - Monitoring periods - Source apportionment - Source directions - Spatial autocorrelations - Spatiotemporal evolution - Sunshine duration Classification code:443.1 Atmospheric Properties - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Percentage 3.00e+01% DOI:10.13227/j.hjkx.202011090 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582381 Title:Screening of Amendments for Simultaneous Cd and As Immobilization in Soil Title of translation:同步钝化土壤Cd和As 材料的筛选 Authors:Zhou, Si-Jiang (1, 2); Liu, Zhen-Yan (1, 2); Xiong, Shuang-Lian (1, 2); Ma, Shuo (3); Huang, Yi-Hao (1, 2); Lei, Yin (1, 2); Cao, Meng-Hua (1, 2); Tu, Shu-Xin (1, 2) Author affiliation:(1) College of Resources and Environment, Huazhong Agricultural University, Wuhan; 430070, China; (2) Hubei Key Laboratory of Soil Environment and Pollution Remediation, Wuhan; 430070, China; (3) Wisdri City Environment Protection Engineering Limited Company, Wuhan; 430205, China Corresponding author:Xiong, Shuang-Lian(xsl@mail.hzau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3527-3534 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Simultaneously reducing the availability of Cd and As is difficult owing to converse chemical behaviors of Cd and As in soil. In this study, amendments that can simultaneously immobilize Cd and As in soil were determined by an pure soil culture experiment in which flooding and wetting were performed for 30 d each. The effects of sepiolite (Sep), modified sepiolite (IMS and Sep-FM), steel slag (SS), and iron modified biochar (Fe-Bio) on soil pH, Eh, Cd, and As concentrations in pore water, and Cd and As fractions in soil were investigated. It showed that Sep (1%, 2.5%), IMS (1%, 2.5%), Sep-FM (1%, 2.5%), and SS (1%, 5%) treatments increased soil pH value and decreased Eh value and Cd concentrations in soil solution. In addition, As concentrations in soil solution treated with high doses of IMS (2.5%) and SS (5%) were lower than that of CK treatment during the whole incubation period. However, Fe-bio treatment decreased soil pH and increased Eh value and only decreased Cd and As concentrations in soil solution under wet conditions. Compared with the control, the application of the above amendments promoted the transformation of Cd fraction from exchangeable to reducible, oxidizable, and residual. High application rates of IMS (2.5%), Sep-FM (2.5%), and SS (5%) also reduced available As fraction (non-specifically sorbed and specifically-sorbed As fraction), and increased amorphous and poorly-crystalline hydrated Fe and Al oxide-bound As. On the contrary, Fe-bio treatment increased the fractions of non-specifically sorbed, specifically sorbed and residual As in soil. In short, IMS, Sep-FM, and SS are potential materials for remediation of Cd and As contaminated soil. They can effectively immobilize soil Cd and As and promote their transformation to the fractions that plants are difficult to uptake.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Soil pollution Controlled terms:Aluminum coated steel - Aluminum oxide - Cadmium - Frequency modulation - Iron oxides - Nanocrystalline materials - Remediation - Slags - Soil moisture Uncontrolled terms:Application rates - Cd concentrations - Chemical behavior - Contaminated soils - Incubation periods - Potential materials - Soil solutions - Wet conditions Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 541.1 Aluminum - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 761 Nanotechnology - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.00e+00%, Percentage 2.50e+00%, Percentage 5.00e+00% DOI:10.13227/j.hjkx.202010022 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688848 Title:Metal Pollutions and Human Health Risks in Groundwater from Wet, Normal, and Dry Periods in the Huixian Karst Wetland, China Title of translation:会仙岩溶湿地丰平枯时期地下水金属元素污染与健康风险 Authors:Li, Jun (1, 2, 3); Zhao, Yi (1, 3); Zou, Sheng-Zhang (1, 3); Lan, Fu-Ning (1, 3); Fan, Lian-Jie (1, 3); Xie, Hao (1, 3); Qin, Yue (1, 3); Zhu, Dan-Ni (1, 3) Author affiliation:(1) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources, Department of Municipal and Environmental Engineering, Hebei University of Architecture, Zhangjiakou; 075000, China; (3) International Research Center on Karst Under the Auspices of United Nations Educational, Scientific and Cultural Organization, Guilin; 541004, China Corresponding author:Zhu, Dan-Ni(zdanni16@karst.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:184-194 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The concentrations of 10 metals (Cd, Cr, As, Al, Cu, Pb, Zn, Mn, Hg, and Fe) in 27 groundwater samples collected during different periods (wet, normal, and dry) in the Huixian Karst wetland, the largest subtropical low-altitude karst wetland in China, were detected and analyzed to investigate pollution and health risks. The pollution characteristics, distribution, and health risks of the metals in groundwater were revealed by a comprehensive pollution assessment, multivariate statistical analysis, and health risk assessment model, respectively. The results showed that the average concentrations of metals in groundwater were followed the order of Mn>Fe>Zn>Al>Hg>Cr>Cu>Cd>As>Pb. The maximum concentration of Mn (1 022.00 μg•L-1) was found in the wet season, while that of Hg (42.40 μg•L-1) was found in the normal season, and both were over the corresponding standard limits. The results of the pollution assessment indicated that only Mn pollution reached level Ⅵ in the wet season, while Cd, Al, Zn, and Fe pollution were at the level of Ⅲ. Only the Hg pollution level reached level Ⅵ while Al pollution reached the level of Ⅲ in the normal water period. According to the above results, the water quality in the dry season was better than that in the wet and normal seasons in terms of the 10 metals. The concentrations of Zn, Cd, Mn, and Al in groundwater were affected by human activities, while the time-scale characteristics of these were not obvious. The concentrations of As, Fe, Cu, and Cr were all affected by human activities and the time-scale, while the concentrations of Hg and Pb were mainly manifested in time-scale characteristics. The results of the health risk assessment of the water due to drinking and the skin penetration pathway indicated that the total health risks followed the order of normal season>the wet season>the dry season. The carcinogenic risks caused by Cr for adults and children through drinking pathway in the wet season (8.03×10-5 a-1 and 8.76×10-5 a-1), normal season (1.15×10-4 a-1 and 1.26×10-4 a-1),and dry season (8.72×10-5 a-1 and 9.51×10-5 a-1) exceeded the maximum allowed level (5.0×10-5 a-1) in all periods. Hence, Cr was the main metal element that caused carcinogenic risks. For the sake of drinking water safety, the concentrations of Mn, Hg, and Cr in groundwater should be controlled before drinking.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Risk assessment Controlled terms:Drought - Groundwater - Groundwater pollution - Health - Health risks - Manganese removal (water treatment) - Metals - Multivariant analysis - Potable water - Time measurement - Water quality - Wetlands Uncontrolled terms:Average concentration - Carcinogenic risk - Human activities - Human health risks - Maximum concentrations - Multivariate statistical analysis - Pollution assessment - Skin penetration Classification code:444 Water Resources - 444.2 Groundwater - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 461.6 Medicine and Pharmacology - 461.7 Health Care - 914.1 Accidents and Accident Prevention - 922 Statistical Methods - 943.3 Special Purpose Instruments Numerical data indexing:Mass_Density 2.20e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 4.24e-05kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202005338 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582356 Title:Application of ARIMA Model for Mid- and Long-term Forecasting of Ozone Concentration Title of translation:ARIMA时间序列分析模型在臭氧浓度中长期预报中的应用 Authors:Li, Ying-Ruo (1, 2, 3); Han, Ting-Ting (1, 2); Wang, Jun-Xia (4); Quan, Wei-Jun (3); He, Di (3); Jiao, Re-Guang (3); Wu, Jin (3); Guo, Heng (3); Ma, Zhi-Qiang (1, 2, 3) Author affiliation:(1) Institute of Urban Meteorology, China Meteorological Administration, Beijing; 100089, China; (2) Key Laboratory of Atmospheric Chemistry, China Meteorological Administration, Beijing; 100089, China; (3) Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, China Meteorological Administration, Beijing; 100089, China; (4) College of Environmental Science and Engineering, Peking University, Beijing; 100871, China Corresponding author:Ma, Zhi-Qiang(zqma@ium.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3118-3126 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Ozone pollution has recently become a severe air quality issue in the Beijing-Tianjin-Hebei region. Due to the lack of a precursor emission inventory and complexity of physical and chemical mechanism of ozone generation, numerical modeling still exhibits significant deviations in ozone forecasting. Owing to its simplicity and low calculation costs, the time series analysis model can be effectively applied for ozone pollution forecasting. We conducted a time series analysis of ozone concentration at Shangdianzi, Baoding, and Tianjin sites. Both seasonal and dynamic ARIMA models were established to perform mid- and long-term ozone forecasting. The correlation coefficient R between the predicted and observed value can reach 0.951, and the RMSE is only 10.2 μg•m-3 for the monthly average ozone prediction by the seasonal ARIMA model. The correlation coefficient R between the predicted and observed value increased from 0.296-0.455 to 0.670-0.748, and RMSE was effectively reduced for the 8-hour ozone average predicted by the dynamic ARIMA model.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Autoregressive moving average model Controlled terms:Air quality - Dynamics - Forecasting - Harmonic analysis - Ozone - Time series analysis Uncontrolled terms:Beijing-tianjin-hebei regions - Chemical mechanism - Correlation coefficient - Emission inventories - Long-term forecasting - Ozone concentration - Ozone forecasting - Seasonal ARIMA models Classification code:451.2 Air Pollution Control - 804 Chemical Products Generally - 921.6 Numerical Methods - 922.2 Mathematical Statistics Numerical data indexing:Time 2.88e+04s DOI:10.13227/j.hjkx.202011237 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003357 Title:Effects of Water Management and Silicon Application on Iron Plaque Formation and Uptake of Arsenic and Cadmium by Rice Title of translation:水分管理与施硅对水稻根表铁膜及砷镉吸收的影响 Authors:Chen, Jia (1); Zhao, Xiu-Lan (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China Corresponding author:Zhao, Xiu-Lan(zxl@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1535-1544 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the effects of water management and silicon application on the bioavailability of soil arsenic (As) and cadmium (Cd), and the accumulation of As and Cd in rice, pot experiments were carried out using As/Cd co-contaminated paddy soil from a field in Kaiyang County, Guizhou Province. The experimental treatments had the following five water application modes with and without silicon addition: flooding during the entire growth period (T1); flooding for three weeks (0-105 d) after transplanting with wet irrigation (moisture content 50%-60%) during other growth periods (T2); flooding for three weeks before heading (0-65d), three weeks after heading (84-105d), and wet irrigation during other growth periods (T3); flooding from heading to three weeks after heading (84-105d) and wet irrigation during the other growth periods (T4); and wet irrigation during the entire growth period (T5). The results showed that compared with flooding and wet irrigation, flooding combined with wet irrigation was more conducive to the formation of iron plaque (DCB-Fe) on the surfaces of roots. As and Cd content increased with an increasing of content of DCB-Fe. Silicon application increased soil pH and the content of DCB-As but decreased available As and Cd in the soil and, with the exception of the flooding treatment, the DCB-Fe/Cd content. The shorter the flooding time, the higher the accumulation of Cd and the lower the accumulation of As in each part of the rice. Silicon application increased the biomass of rice but decrease the Cd content of roots, stems, leaves, and grain by 4.23%-31.06%, 11.41%-52.90%, 1.74%-35.73%, and 19.25%-39.76%, respectively. Silicon application also decreased the As content of roots, stems, leaves, and grain by 1.47%-52.60%, 6.12%-63.02%, 2.97%-28.41%, and 16.33%-61.23%, respectively. Among the five modes of water application tested, silicon application combined with the T3 mode achieved the highest rice biomass and lowest rice As and Cd contents. Therefore, it is suggested that selecting water management and silicon application regimes according to the level of As/Cd pollution can effectively decrease the bioavailability of As/Cd in the soil, thereby reducing the accumulation of As/Cd in rice.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Soil pollution Controlled terms:Arsenic - Biochemistry - Cadmium - Floods - Grain (agricultural product) - Iron - Irrigation - Silicon - Soils - Water management - Water pollution Uncontrolled terms:Application modes - Cadmiums (Cd) - Flooding time - Growth period - Guizhou Province - Iron plaques - Pot experiment - Silicon additions Classification code:453 Water Pollution - 483.1 Soils and Soil Mechanics - 545.1 Iron - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 804 Chemical Products Generally - 821.3 Agricultural Methods - 821.4 Agricultural Products Numerical data indexing:Percentage 1.47e+00% to 5.26e+01%, Percentage 1.63e+01% to 6.12e+01%, Percentage 1.92e+01% to 3.98e+01%, Percentage 4.23e+00% to 3.11e+01%, Percentage 5.00e+01% to 6.00e+01% DOI:10.13227/j.hjkx.202008147 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003422 Title:Geochemical Patterns and Source Analysis of Soil Heavy Metals in an Iron and Manganese Ore Area of Longyan City Title of translation:龙岩市某铁锰矿区土壤重金属地球化学空间分布特征与来源分析 Authors:Wang, Rui (1); Chen, Nan (2); Zhang, Er-Xi (3); Li, Xiao-Sai (1) Author affiliation:(1) MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing; 100037, China; (2) Environmental Development Centre of the Ministry of Ecology and Environment, Beijing; 100029, China; (3) College of Science, Xijing University, Xi'an; 710123, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1114-1122 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Bedrock and soil samples from different soil profile layers were collected in an iron and manganese ore area of Longyan City and total amounts of Pb, Cd, and As were determined. The geochemical patterns of three heavy metal elements in the soil were studied using ordinary Kriging interpolation and their sources were also analyzed. High concentrations of Pb and As were found near the mining area to the west, at the intersection of two rivers in the middle, and near the waste rock heap in the east of the study area, while the main area of Cd contamination is located near to the mining areas and ore dressing plant. Based on a horizontal section, the content of Pb, Cd, and As in soils from the high-value region of each layer decreased with horizontal distance from the mining area. Vertically, the concentrations of heavy metals in different soil layers were significantly correlated. Near the mining area, Pb, Cd, and As concentrations first increased and then decreased with depth. In other high-value regions, the concentrations of these three heavy metals decreased with soil profile depth. These heavy metals inherit the characteristics of the deposit and bedrock during the weathering process, and the content of Pb and As in the soil at different depths was significantly positively correlated with granite and diorite content. Although As has been artificially influenced by mining, this influence does not appear to be strong; parent rock in the study area shows higher concentrations of heavy metals, while at the same time, the Pb and Cd content of soil is significantly higher than in the rock indicating the influence of human activities including mining, transportation, and agricultural production. Further attention should now be paid to the quality and safety of agricultural products, crop growth, and possible environmental risks in the study area.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Soils Controlled terms:Agricultural products - Agricultural robots - Geochemistry - Heavy metals - Interpolation - Iron - Ore analysis - Ores - River pollution - Weathering Uncontrolled terms:Agricultural productions - Environmental risks - Geochemical patterns - Heavy metal elements - Horizontal section - Ore dressing plant - Quality and safeties - Weathering process Classification code:453 Water Pollution - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 545.1 Iron - 801 Chemistry - 821.4 Agricultural Products - 921.6 Numerical Methods DOI:10.13227/j.hjkx.202007142 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779887 Title:Experimental Influence of Food Waste Fermentation Broth on the Soil Quality in a Loess Hilly Area Title of translation:餐厨垃圾生物发酵液对黄土丘陵区土壤质量的影响试验 Authors:Shao, Li-Ming (1, 2); Ren, Jun-Da (1, 2); Lü, Fan (1, 2); Zhang, Hua (1, 2); He, Pin-Jing (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (2) Shanghai Institute of Pollution Control and Ecological Security, Shanghai; 200092, China Corresponding author:He, Pin-Jing(solidwaste@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4500-4509 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Loess is widely distributed in northwestern China. Due to the arid climate and rainstorm erosion, lack of nutrients and microorganisms, as well as severe salinization limits the ecosystem carrying capacity of loess soil, which has become one of the major causes of regional land desertification. The fermentation broth derived from food waste usually contains substantial organic acids and nutrients such as nitrogen and phosphorus, and it has the advantages of being easily produced industrially and applied as fertilizer. Hence, this broth has the potential to become a soil amendment for loess soils. This work studied the Lanzhou loess, which is a typical soil of the Loess Plateau of China, fertilized with fermentation broth for the evaluation of physicochemical properties and microbial analyses. After the application of the broth amendment, the total nitrogen, available phosphorus and potassium, and organic matter content increased by 363%, 577%, 308%, and 204%, respectively. After planting grass, including Halogeton arachnoideus Moq. and Medicago sativa L., the comprehensive soil fertility level was further improved and the total salt content of the soil was decreased by 2.3 g•kg-1 and 1.2 g•kg-1, respectively. Meanwhile, the fermentation broth promoted the growth of microorganisms, including bacteria and archaea, which increased by 22 times, and fungi by 8.3 times. Therefore, food waste fermentation broth is conducive to further forming plant-microorganisms symbiosis, improving the ecological environment quality of loess soils.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Soils Controlled terms:Fermentation - Food waste - Microorganisms - Nitrogen fertilizers - Nutrients - Phosphorus - Physicochemical properties - Sediments - Storms Uncontrolled terms:Available phosphorus - Ecological environments - Fermentation broths - Land desertification - Loess plateau of chinas - Nitrogen and phosphorus - Organic matter content - Soil fertility levels Classification code:443.3 Precipitation - 461.9 Biology - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally Numerical data indexing:Percentage 2.04e+02%, Percentage 3.08e+02%, Percentage 3.63e+02%, Percentage 5.77e+02% DOI:10.13227/j.hjkx.202012234 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651064 Title:Evolution of Material Metabolism in China's Pulp and Paper Industry Title of translation:中国造纸业物质代谢演化特征 Authors:Liu, Xin (1); Yang, Tao (1, 2); Wu, Hui-Jun (2); Yuan, Zeng-Wei (1) Author affiliation:(1) State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China; (2) College of Earth and Environment, Anhui University of Science and Technology, Huainan; 232001, China Corresponding author:Yuan, Zeng-Wei(yuanzw@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:4061-4070 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The pulp and paper industry is an important industry that is closely related to national socioeconomic development. To understand the historical trends of resource consumption and environmental pollution, we conducted an economy-wide material flow analysis and quantitatively evaluated the dynamic characteristics of input-output balances, material metabolism intensity, and resource recycling rate of China's pulp and paper industry, from 2005 to 2017. The results indicate downward trends in the material inputs and outputs of China's pulp and paper industry from 2005 to 2017, with water contributing over 90% of the totals. In recent years, with the continuous optimization of the raw material structure of the paper industry, the proportion of non-wood pulping has dropped from 42% to 13% and has been replaced by mainly waste paper pulping and wood pulping. Resource consumption can still be greatly reduced. In 2017, the amount of direct material input per ton of paper and paperboard had decreased by 67% from 2005 to 26 t. The consumption of fresh water per ton of paper and paperboard dropped by approximately 69% over the study period, whereas the water recycling rate increased significantly, reaching 77% in 2017. At present, the production of paper and paperboard is increasingly dependent on the input of domestic waste paper and imported wood, the proportions of which have increased from 21% and 9% in 2005 to 60% and 31% in 2017, respectively. However, the rate of domestic waste paper recycling is relatively low, and measures such as strengthening the construction of the recycling system and educating the residents about recycling are needed to alleviate the shortage of raw materials caused by restrictions on waste paper imports.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Paper and pulp mills Controlled terms:Economics - Optimization - Paper and pulp industry - Paperboards - Pulp - Waste paper - Water recycling Uncontrolled terms:Continuous optimization - Direct material inputs - Dynamic characteristics - Economy-wide material flow analysis - Environmental pollutions - Paper and paperboard - Pulp and paper industry - Socio-economic development Classification code:811.1 Pulp and Paper - 811.1.2 Papermaking Equipment - 921.5 Optimization Techniques - 971 Social Sciences Numerical data indexing:Percentage 2.00e+03% to 6.00e+01%, Percentage 2.10e+01%, Percentage 3.10e+01%, Percentage 4.20e+01% to 1.30e+01%, Percentage 6.70e+01%, Percentage 6.90e+01%, Percentage 7.70e+01%, Percentage 9.00e+00%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202012076 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651067 Title:Effects of Straw Returning with Chemical Fertilizer on Soil Enzyme Activities and Microbial Community Structure in Rice-Rape Rotation Title of translation:秸秆还田配施化肥对稻-油轮作土壤酶活性及微生物群落结构的影响 Authors:Jin, Yu-Ting (1); Li, Xian-Fan (1); Cai, Ying (1); Hu, Hong-Xiang (1); Liu, Yun-Feng (1); Fu, Si-Wei (1); Zhang, Bo-Rui (1) Author affiliation:(1) Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei; 230036, China Corresponding author:Hu, Hong-Xiang(hongxianghu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3985-3996 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Straw returning is an effective technique for improving soil fertility and maintaining crop productivity in agro-ecosystems. The effects of straw returning, when combined with chemical fertilizer, on soil nutrients, enzyme activity, and microbial community were explored in rice-rape rotation farmland in the Chaohu Area. We carried out a 4-year field experiment (2016- 2020) and set up four treatments (no straw+no fertilization, CK; conventional fertilization, F; straw returning+conventional fertilization, SF; and straw returning+conventional fertilization minus 20%, SDF) to explore the key environmental factors affecting soil enzyme activity and microbial and fungal communities. The results showed that straw returning combined with chemical fertilizer could improve soil nutrient content, with the SF treatment resulting in the highest soil nutrient content. Compared with F, the SF treatment significantly increased the organic matter (OM) and total phosphorus (TP) content of the soil, by 7.94% and 24.07%, respectively, in rice seasons (P<0.05), while the alkaline nitrogen (AN) content was significantly increased by 13.62% in rape seasons (P<0.05). Compared with F, the SF treatment also significantly increased soil phosphatase and urease, by 28.54% and 24.13% in rice seasons and 38.97% and 30.70% in rape seasons, respectively (P<0.05). Compared with F, SDF treatments significantly increased urease activity by 20.31% in rice seasons and 24.33% in rape seasons (P<0.05). The results indicated that straw returning increased both the Chao1 and Shannon indices of soil bacteria in rice seasons, whereas decreased these indices in rape seasons. However, the Chao1 and Shannon index of the fungal community increased after straw returning. In terms of microbial community structure, the relative abundance of Proteobacteria in SF and SDF treatments increased by 8.22% and 7.88% in rice seasons and 18.53% and 5.68% in rape seasons, respectively, compared with the F treatment. Compared with F, the relative abundance of Chloroflexi in SF and SDF treatments increased by 12.00% and 11.25% in rice seasons and 15.02% and 8.43% in rape seasons, respectively. Compared with F, the relative abundance of Basidiomycota in SF and SDF treatments in rice seasons increased by 70% and 43.42% (P<0.05), respectively, while ascomycetes in rape seasons increased by 69.79% and 43.72% (P<0.05), respectively. In conclusion, straw returning combined with chemical fertilizer can improve soil nutrient content. Soil urease and phosphatase were more sensitive to straw returning. The compositional changes in the bacterial community of the soil were mainly affected by soil TP and available phosphorus (AP), whereas OM, AN, and pH were the main environmental factors causing changes in the fungal community composition. Consequently, straw returning can improve soil fertility and maintain ecosystem health.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Fertilizers Controlled terms:Alkalinity - Bacteria - Ecosystems - Enzyme activity - Forestry - Fungi - Nutrients - Phosphatases - Phosphorus - Soils Uncontrolled terms:Available phosphorus - Chemical fertilizers - Compositional changes - Environmental factors - Fungal community compositions - Microbial communities - Microbial community structures - Soil enzyme activity Classification code:454.3 Ecology and Ecosystems - 461.9 Biology - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 804 Chemical Products Generally Numerical data indexing:Age 4.00e+00yr, Percentage 1.12e+01%, Percentage 1.20e+01%, Percentage 1.36e+01%, Percentage 1.50e+01%, Percentage 1.85e+01%, Percentage 2.00e+01%, Percentage 2.03e+01%, Percentage 2.41e+01%, Percentage 2.43e+01%, Percentage 2.85e+01%, Percentage 3.07e+01%, Percentage 3.90e+01%, Percentage 5.68e+00%, Percentage 6.98e+01%, Percentage 7.00e+01%, Percentage 7.88e+00%, Percentage 7.94e+00%, Percentage 8.22e+00%, Percentage 8.43e+00% DOI:10.13227/j.hjkx.202012077 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779662 Title:Effect of Anaerobic Plug-flow on Nitrification Denitrifying Phosphorus Removal Aerobic Granular Sludge with Intermittent Aeration Title of translation:厌氧推流进水对反硝化除磷好氧颗粒污泥系统的影响 Authors:Li, Dong (1); Cao, Si-Yu (1); Wang, Qi (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin; 150090, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4399-4405 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Actual domestic sewage has a complex composition and relatively low carbon and nitrogen content. Anaerobic plug-flow influent can enhance the utilization of COD by aerobic granular sludge by providing a locally high concentration of substrate. In this study, intermittent aeration was used to cultivate aerobic granular sludge in a sequencing batch reactor (SBR), and actual domestic sewage was used as the feed water to inoculate the sewage plant sludge. In the R1 experiment, rapid anaerobic feeding was adopted, while in R2, anaerobic plug-flow feeding was adopted, to explore the impact of different feeding modes on the aerobic granular sludge system of domestic sewage. Under rapid anaerobic feeding in R1, the particle structure appeared earlier, but particle breakage occurred after 71 days of operation; the particle structure generated in R2 was denser than that of R1, the particle surfaces were smoother, and the denitrifying phosphorous accumulating organisms (DPAO) had a more enriching effect. In the final R1 and R2 reactors, the proportion of DPAO to phosphorous accumulating organisms (PAO) was 14.17% and 22.07%, respectively. The results show that the anaerobic plug-flow feeding mode can enhance the use of influent COD by granular sludge, which is conducive to enriching DPAO, generating denser and more stable particles, realizing "one carbon dual purpose" operation, and removing more nitrogen and phosphorus.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Sewage aeration Controlled terms:Batch reactors - Carbon - Concentration (process) - Denitrification - Feeding - Granular materials - Nitrogen - Phosphorus - Sewage Uncontrolled terms:Aerobic granular sludges - Complex compositions - Denitrifying phosphorus removal - Intermittent aeration - Nitrogen and phosphorus - Particle breakage - Particle structure - Sequencing batch reactors Classification code:452.1 Sewage - 452.2 Sewage Treatment - 691.2 Materials Handling Methods - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Age 1.95e-01yr, Percentage 1.42e+01%, Percentage 2.21e+01% DOI:10.13227/j.hjkx.202102016 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003418 Title:Analysis of Changes and Factors Influencing Air Pollutants in the Beijing-Tianjin-Hebei Region During the COVID-19 Pandemic Title of translation:COVID-19疫情期间京津冀大气污染物变化及影响因素分析 Authors:Zhao, Xue (1); Shen, Nan-Chi (1); Li, Ling-Jun (2); Wu, Gao-Feng (1); Tao, Jing (1); Zhao, Wen-Ji (1) Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Beijing Municipal Ecological and Environmental Monitoring Center, Beijing; 100048, China Corresponding author:Zhao, Wen-Ji(zhwenji1215@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1205-1214 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A series of strict control measures were imposed in the Beijing-Tianjin-Hebei region in early 2020 to control the spread of COVID-19. These measures have led to a reduction of anthropogenic air pollutants, providing an opportunity to observe the contribution of human activities to local air pollution. In this study, the control period was divided into four stages: the before, early, middle, and later stages. Based on a variety of data including meteorological, traffic, and industrial manufacturing datasets, statistical methods were combined with spatial analysis to evaluate changes in air pollution and associated human impacts during each stage. In addition, suggestions are made for further regional air pollution control in the Beijing-Tianjin-Hebei area. Key results are as follows: ① Overall, the AQI and the concentrations of six air pollutants, especially SO2, PM10, and NO2, were lower during control period than during the equivalent period in 2019 (reductions of 26.5%, 24.3%, and 16.9%, respectively). From the before to later stages, pollutants (except O3) showed a downward trend while O3 increased significantly during the before stage (by 76.2%) and the growth rate slowed during the middle and later stages; ②During the prior stage, Beijing experienced two periods with heavy air pollution days as a result of the local accumulation of pollutants, secondary transformation, and regional transport. The concentration of PM2.5 in February was nearly 60% lower than in February 2014 under similar meteorological conditions in Beijing; ③ Following an increase in traffic volume and industrial activity, changes in air pollutants tended to be stable or slightly increase during the middle and later stages of the control period. The grey relation coefficients between thermal radiation intensity anomalies and the main pollutants in heavy industrial cities were greater than 0.6, which means that the control of industrial emissions remains key to controlling air pollution.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Air pollution control Controlled terms:Air pollution - Atmospheric movements - Industrial emissions - Sulfur dioxide - Thermal pollution Uncontrolled terms:Beijing-tianjin-hebei regions - Industrial activities - Industrial manufacturing - Local air pollutions - Meteorological condition - Radiation intensity - Regional air pollution - Secondary transformation Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.69e+01%, Percentage 2.43e+01%, Percentage 2.65e+01%, Percentage 6.00e+01%, Percentage 7.62e+01% DOI:10.13227/j.hjkx.202007249 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126239 Title:Cadmium Accumulation Characteristics and Impacting Factors of Different Rice Varieties Under Paddy Soils with High Geological Backgrounds Title of translation:地质高背景农田土壤下不同水稻品种对Cd的累积特征及影响因素 Authors:Dai, Zi-Wen (1); Fang, Cheng (1); Sun, Bin (1); Wei, Zhi-Min (1); Hu, Feng (1); Li, Hui-Xin (1); Xu, Li (1) Author affiliation:(1) College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China Corresponding author:Xu, Li(xuli602@njau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2016-2023 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The cadmium (Cd) accumulation characteristics of seven rice varieties (Ningliangyou 1, Y Liangyou 1, Shenliangyou, Tailiangyou, Yuejingsimiao, Youzhanbahao, and Huang Huazhan) were studied by pot-culture experiments in two paddy soils (Maling, Yunbiao) with different high geological backgrounds, and the possible impacting factors were explored. The results indicated that: ① The grain Cd contents of the seven rice varieties grown in the two soils did not exceed the national food safety standard (GB 2762-2017), and the grain Cd content of Shengliangyou was the lowest; ② The grain Cd content of the seven rice varieties planted in the soil of Maling was higher than those of Yunbiao; ③ The redundancy analysis revealed that the accumulation of Cd in grains was influenced by the plant height, surface area of root, total cadmium in the soil, and EC and Eh of the soil during the heading stage. The correlation analysis indicated that the leading impacting factor of the grain Cd accumulation varied. In the Maling soil, the grain Cd content was primarily related to the rice root length, while it was related to the aboveground rice biomass in the Yunbiao soil.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Grain (agricultural product) Controlled terms:Cadmium - Chemical contamination - Food safety - Geology - Soils Uncontrolled terms:Accumulation characteristics - Cadmiums (Cd) - Cd accumulation - Correlation analysis - Geological background - Impacting factor - National Foods - Redundancy analysis Classification code:481.1 Geology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4 Agricultural Products - 822.3 Food Products DOI:10.13227/j.hjkx.202009003 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688819 Title:Seasonal Distribution Characteristics and Health Risk Assessment of Heavy Metals in Surface Water of Qingjiang River Title of translation:清江流域地表水重金属季节性分布特征及健康风险评价 Authors:Liu, Zhao (1); Zhou, Hong (1); Cao, Wen-Jia (1); Liu, Wei (1, 2, 3); Lan, Sheng-Tao (1) Author affiliation:(1) Institute of Geological Survey, China University of Geosciences, Wuhan; 430074, China; (2) Key Laboratory of Karst Dynamics, Ministry of Natural Resources & Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (3) Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Ministry of Natural Resources, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China Corresponding author:Zhou, Hong(zhouhong@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:175-183 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to assess the health risks of heavy metals in surface water of Qingjiang River, surface water samples were taken at designed cross-sections of the river and analyzed for Cr, Cu, Zn, Pb, Cd, As, and Mn. Health risks from these heavy metals for adults and children in wet and dry seasons were compared by water environmental health risk assessment model of the USEPA. It found that the main excessive element is Mn, concentrating in the Danshui, Yantouxi, and Pingluoxi, the slightly excessive element is As, the concentration of Mn was above national standard, and it mainly distributed in Danshui, Yantouxi, and Pingluoxi, As was slightiy over the standard, and it concentrated in Wujiahe, The content of heavy metals during wet season were all higher than those during dry season. Cr, Cu, Zn, and Cd are mainly originated from the nature, Pb and As are separately mainly originated from traffic and agriculture, Mn originated from mining mainly in the downstream, while it has natural source from upper to middle. The health risks of heavy metals in surface water to adults and children in wet season are higher than those in dry season. The main health risk area was the midstream. As was the highest health risk element and children were the most preventive group. Specially, people in towns who drink the water from midstream should pay more attention.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Risk assessment Controlled terms:Agricultural robots - Drought - Health - Health risks - Heavy metals - Manganese removal (water treatment) - River pollution - Rivers Uncontrolled terms:Dry seasons - Environmental health risk assessment - National standard - Natural sources - Qingjiang river - Risk elements - Seasonal distributions - Wet and dry seasons Classification code:444 Water Resources - 445.1 Water Treatment Techniques - 453 Water Pollution - 461.6 Medicine and Pharmacology - 461.7 Health Care - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202006050 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779850 Title:Spatial Distribution Characteristics and Risk Assessment of Cadmium Pollution in Soil-crops system of an E-waste Dismantling Area Title of translation:电子垃圾拆解区土壤-农作物系统中镉元素的空间分布特征及其风险评价 Authors:Zhang, Lu-Yao (1, 2); Zhao, Ke-Li (1, 3); Fu, Wei-Jun (1, 2) Author affiliation:(1) College of Environmental and Resource Sciences, Zhejiang A& F University, Lin'an; 311300, China; (2) Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province, Zhejiang A& F University, Lin'an; 311300, China; (3) Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A& F University, Lin'an; 311300, China Corresponding author:Fu, Wei-Jun(fuweijun@zafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4432-4440 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
With the rapid development of electronic technology, soil heavy metal contamination caused by electronic waste dismantling activities has attracted the attention of many researchers. To investigate the contamination status and spatial distribution of Cd in soil-crop systems around an e-waste dismantling area, 171 pairs of soil and crop samples were collected for analysis. The concentrations of cadmium in root vegetable soil, leaf vegetable soil, solanaceous vegetable soil, and orchard soil were (1.292±0.647), (1.010±0.201), (0.921±0.125), and (0.861±0.135) mg•kg-1, respectively. The average values of cadmium in these four soil types were 10.0, 7.8, 7.1, and 6.3 times the background values of soil Cd in Zhejiang Province, respectively, and 4.31, 3.4, 3.07, and 2.72 times the risk screening values for soil contamination of agricultural land, clearly indicating cadmium accumulation in the soil. However, only a small percentage of crops contained cadmium levels that exceeded food safety limits. Moreover, different types of crops showed different capacities for cadmium enrichment and can be ranked accordingly: leaf vegetables> root vegetables> solanaceous vegetables> fruits. The single factor pollution index and the potential ecological risk assessment revealed severe Cd contamination in the study area, with a high potential ecological risk. Cadmium exposure posed a higher health risk for children than for adults. However, the single heavy metal cadmium pollution index does not indicate a threat to local residents at this time. Moran's I index and kriging interpolation results revealed that Cd has significant spatial autocorrelation, with high values mainly concentrating around the e-waste dismantling area, indicating a significant correlation with e-waste dismantling activities.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Soil pollution Controlled terms:Agricultural robots - Cadmium - Chemical contamination - Contamination - Crops - Electronic equipment - Electronic Waste - Health risks - Interpolation - Risk assessment - Soil surveys - Soils - Spatial distribution - Spatial variables measurement - Vegetables - Wastes Uncontrolled terms:Distribution characteristics - Electronic technologies - Kriging interpolation - Potential ecological risk - Soil contamination - Soil heavy metals - Spatial autocorrelations - Zhejiang Province Classification code:461.7 Health Care - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4 Agricultural Products - 822.3 Food Products - 914.1 Accidents and Accident Prevention - 921 Mathematics - 921.6 Numerical Methods - 943.2 Mechanical Variables Measurements DOI:10.13227/j.hjkx.202101212 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065984 Title:Spatial Distribution, Risk, and Influencing Factors of River Water-Sediment Heavy Metals in the Lower Reaches of the Qianhe River Title of translation:千河下游水体-沉积物重金属空间分布, 风险及影响因素 Authors:Gao, Yu (1); Wang, Guo-Lan (1); Jin, Zi-Han (1); Zhang, Jun (1, 2); Geng, Ya-Ni (1) Author affiliation:(1) Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, Baoji University of Arts and Sciences, Baoji; 721013, China; (2) Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an; 710064, China Corresponding authors:Zhang, Jun(zhangjun1190@126.com); Zhang, Jun(zhangjun1190@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5333-5345 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The spatial distribution of heavy metals in rivers is affected by human activities and the natural environment, posing a risk to human health related to heavy metal pollution. In order to study the characteristics, health risk levels, and influencing factors of heavy metal distribution and pollution in the lower reaches of the Qianhe River, 19 surface sediments and 20 water samples were collected, and the contents of As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn were measured by inductively coupled plasma mass spectrometry(ICP-MS). Using the DEM, air temperature, precipitation and other 11 factors as independent variables, the spatial differentiation of heavy metal pollution in sediments were explored based on geo-detector and geo-weighted regression model. The results showed that the eight heavy metal contents in the lower reaches of the Qianhe River did not exceed the "Surface Water Environmental Quality Standards" Ⅱ for water-like bodies, in which the variation coefficient of Pb element was 3.11, and the high content areas were mainly concentrated around Dongling Smelting Company and Fengxiang Railway Station. The average Rc value of adult carcinogens in water bodies was 7.72 E-06, showing a low risk level, and the children's carcinogens average Rc value was 1.17 E-04, showing a strong risk degree. The non-carcinogen risks for adults and children were both tolerable. The total high R value for children was mainly concentrated around Fengxiang Railway Station, posing a high risk. Sedimentation of heavy metals, except As and Mn, exceeded the soil background value in Shaanxi Province. The average content of Cd element was 1.12 mg•kg-1, which was 12 times the soil background value in Shaanxi Province. The pollution of Cd, Zn, and Pb was high, and distributed mainly in Changqing Village, Nanwan Village and Niujiatan Village, Gaozhuang, and Dongling Smelting Company. PLIzone of heavy metals in the sediments in the study area was 1.71, which was light pollution. DEM, temperature and precipitation were the main natural factors influencing the spatial pattern of heavy metal pollution load index(PLI)in sediments, and their nonlinear interactions were enhanced, which may play a role in the spread of heavy metals in sediments. This research can provide a scientific basis for urban planning and human health risks prevention in the Qianhe River.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Risk assessment Controlled terms:Health risks - Heavy metals - Inductively coupled plasma mass spectrometry - Precipitation (chemical) - Railroads - Regression analysis - River pollution - Rivers - Sediments - Soils - Spatial distribution Uncontrolled terms:Background value - C values - Geographic detector - Geographical weighted regressions - Geographics - Heavy metals pollution - Qianhe river - Railway stations - Risk levels - Risks assessments Classification code:405.3 Surveying - 453 Water Pollution - 461.7 Health Care - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801 Chemistry - 802.3 Chemical Operations - 902.1 Engineering Graphics - 914.1 Accidents and Accident Prevention - 921 Mathematics - 922.2 Mathematical Statistics Numerical data indexing:Mass 1.12E-06kg DOI:10.13227/j.hjkx.202102008 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779872 Title:Meta-analysis of the Effects of Metal Mining on Soil Heavy Metal Concentrations in Southwest China Title of translation:中国西南地区金属矿开采对矿区土壤重金属影响的Meta分析 Authors:Zhang, Jian-Lin (1, 2); Qu, Ming-Kai (2); Chen, Jian (2); Yang, Lan-Fang (1); Zhao, Yong-Cun (2); Huang, Biao (2) Author affiliation:(1) Faculty of Resources and Environment Science, Hubei University, Wuhan; 430062, China; (2) Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Qu, Ming-Kai(qumingkai@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4414-4421 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Metal mining is one of the main contributors of soil heavy metals. Previous studies examining the impact of metal mining on surrounding soil have mainly focused on one or a few metal mining areas. However, such studies cannot effectively inform the management of heavy metal pollution in soil at an inter-provincial scale. As part of this study, literature was collected on soil heavy metals (i.e., As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) affected by metal mining in regions of Southwest China (i.e., Yunnan Province, Sichuan Province, Guizhou Province, Chongqing Municipality, and Tibet Autonomous Region); Next, the impact of metal mining on the soil concentrations of these metals was quantified through meta-analysis, and the relationships between the selected factors (i.e., different sub-regions, metal minerals, and land-use types) and soil heavy metal concentrations were explored. Finally, the literature data was tested for publication bias. The results showed that metal mining in Southwest China has significantly increased the concentrations of heavy metals in topsoil. The different metals were ranked according to their weight effect sizes (ES+) in the following order Cd> Pb> Hg> Zn> As> Cu> Ni> Cr. Metal mining in both Sichuan and Yunnan led to higher effect sizes of soil Cd (ES+Sichuan=4.16, ES+Yunnan=3.20) and Pb (ES+Sichuan=3.47, ES+Yunnan=2.54) than those of the other heavy metals, while metal mining in Guizhou led to a higher effect size of soil Hg (ES+=2.80). The effect size of metal mining on soil heavy metals was higher in cultivated soil (ES+=1.42) than in forested soil (ES+=0.50). The mining of lead-zinc and tin significantly increased the concentrations of soil Cd, Pb, and Zn, and the mining of copper significantly increased the concentrations of soil Cu, Cd, and Pb. Of the investigated soil heavy metals in Southwest China, Pb and Zn showed slight potential publication biases (P< 0.05). The above results can provide more effective information for the environmental protection of soil in metal mining areas of Southwest China.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Soil pollution Controlled terms:Heavy metals - Land use - Mineral exploration - Soils Uncontrolled terms:Guizhou Province - Heavy metal pollution - Publication bias - Sichuan province - Soil concentrations - Soil heavy metals - Surrounding soils - Tibet autonomous region Classification code:403 Urban and Regional Planning and Development - 483.1 Soils and Soil Mechanics - 501.1 Exploration and Prospecting Methods - 531 Metallurgy and Metallography DOI:10.13227/j.hjkx.202012226 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247649 Title:Adsorption of BS-18 Amphoterically Modified Bentonite to Tetracycline and Norfloxacin Combined Pollutants Title of translation:BS-18两性修饰膨润土对四环素和诺氟沙星复合污染的吸附 Authors:Wang, Xin-Xin (1); Meng, Zhao-Fu (1, 2); Liu, Xin (1); Wang, Teng (1); Hu, Xiao-Long (1); Sun, Xiu-Xian (1) Author affiliation:(1) College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling; 712100, China Corresponding author:Meng, Zhao-Fu(zfmeng1996@263.net) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2334-2342 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Antibiotic pollution in the environment has become a hot topic. The amphoteric surfactant octadecyl dimethyl betaine (BS-18) was adopted to modify bentonite to investigate the effects and mechanisms of the composite adsorption of different types of antibiotics. Under the different modification ratios, temperatures, pH values, and ionic strength conditions, the adsorption of tetracycline (TC) and norfloxacin (NOR) by bentonite was studied under single and compound conditions, and the adsorption mechanism was analyzed and discussed in combination with the surface properties of amphoterically modified bentonite. The results showed that compared with those of CK, the CEC and specific surface area of the soil samples modified by BS-18 decreased, whereas the total carbon and total nitrogen contents increased. The adsorption order of BS-18 amphoterically modified bentonite to TC was CK>100BS>25BS>50BS, which was in accordance with the Langmuir model; the adsorption order of NOR was 25BS>50BS>CK>100BS, which was consistent with the Henry model. The adsorption capacity of TC and NOR in the TC and NOR composite system was higher than that in the single system. With the increase in temperature, the adsorption of amphoterically modified bentonite to TC showed a positive warming effect, whereas the adsorption of NOR declined as the temperature increased. When the ionic strength increased from 0.001 mol•L-1 to 0.500 mol•L-1, the adsorption of TC and NOR on each soil sample was inhibited. The pH of the solution can affect the existing forms of TC and NOR, and the adsorption capacity showed different trends as the pH increased. The adsorption of TC by BS-18-modified bentonite was mainly caused by electric charge attraction, whereas the adsorption of NOR was mainly caused by the combination of electric charge attraction and the hydrophobic effect. The different values of the octanol/water partition coefficient and the difference in structure resulted in different adsorption modes. In the TC and NOR composite system, a TC+NOR mixture was formed to promote the adsorption of soil samples.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Adsorption Controlled terms:Alcohols - Amphoteric surfactants - Antibiotics - Bentonite - Electric charge - Hydrophobicity - Ionic strength - Pollution - Soil surveys Uncontrolled terms:Adsorption capacities - Adsorption mechanism - Adsorption modes - Hydrophobic effect - Modified bentonites - Octanol/water partition coefficient - Strength condition - Total nitrogen content Classification code:461.6 Medicine and Pharmacology - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 701.1 Electricity: Basic Concepts and Phenomena - 801.4 Physical Chemistry - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Molar_Concentration 1.00e+00mol/m3 to 5.00e+02mol/m3 DOI:10.13227/j.hjkx.202009048 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003459 Title:Effects of Chitosan-modified Biochar on Formation of Methylmercury in Paddy Soils and Its Accumulation in Rice Title of translation:壳聚糖改性生物炭对水稻土甲基汞生成及其稻米积累的影响 Authors:Yang, Xue-Ling (1); Wang, Ming-Xing (1); Xu, Guo-Min (2); Wang, Ding-Yong (1, 3) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Guizhou Material Industrial Technology Institute, Guiyang; 550014, China; (3) Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, Southwest University, Chongqing; 400715, China Corresponding author:Wang, Ding-Yong(dywang@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1191-1196 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Rice is well known to accumulate methylmercury (MeHg) and the consumption of rice in mercury (Hg) polluted areas has been confirmed to be a primary source of MeHg exposure. Therefore, how to inhibit the formation and accumulation of MeHg in the paddy field system needs to be solved urgently. Chitosan modified biochar, a potential inhibitor, was selected in this study to explore its effect on MeHg production and accumulation in the paddy field system by analyzing the mercury content of interstitial water, soil, and rice plant tissues. The results showed that the addition of chitosan modified biochar could significantly reduce MeHg concentration in the soil with the decreased methylation rate of 51.1%-79.1%, and could also decrease the total mercury (THg) and MeHg content of interstitial water. At the maturation stage of rice, the MeHg content of rice roots treated with chitosan modified biochar (CMBC) was 73.1% lower than without biochar (CK1) and 62.0% lower than with unmodified biochar (CK2), and the rice MeHg was 75.8% lower than that of CK1 and 72.9% lower than that of CK2. In addition, the application of biochar could promote the growth of rice with the plant biomass of CMBC and CK2 of 1.6 and 1.7 times higher than that of CK1. Generally, the application of chitosan modified biochar into paddy soil could not only promote the growth of rice, but also inhibit the accumulation of MeHg in rice, suggesting that the chitosan modified biochar has a certain application value in the inhibition of the MeHg formation and accumulation in paddy field system.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Soil pollution Controlled terms:Alkylation - Chitosan - Mercury (metal) - Mercury compounds - Soils Uncontrolled terms:Interstitial water - Maturation stage - Mercuries (Hg) - Mercury content - Methylmercury - Potential inhibitors - Primary sources - Total mercuries Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 804.1 Organic Compounds Numerical data indexing:Percentage 5.11e+01% to 7.91e+01%, Percentage 6.20e+01%, Percentage 7.29e+01%, Percentage 7.31e+01%, Percentage 7.58e+01% DOI:10.13227/j.hjkx.202010205 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247516 Title:Using the Matter-Element Extension Model to Assess Heavy Metal Pollution in Topsoil in Parks in the Main District Park of Lanzhou City Title of translation:基于物元可拓模型的兰州市主城区公园表土重金属污染评价 Authors:Hu, Meng-Jun (1); Li, Chun-Yan (1); Li, Na-Na (1); Ji, Tian-Qi (1); Zheng, Deng-You (1) Author affiliation:(1) College of Geography and Environmental Sciences, Northwest Normal University, Lanzhou; 730070, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2457-2468 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The UNMIX model was used to analyze the source of heavy metals found to be present in the topsoil of parks in the main district of Lanzhou City. The Hakanson toxicity response coefficient was used concurrently to modify the traditional weights in the model, and the matter-element extension model was used to evaluate heavy metal pollution. The results of the evaluation were compared with the comprehensive pollution index (PN) and potential ecological risk index (RI). The results were as follows. ①The average heavy metal content in the topsoil at each sampling point was higher than that of the background value of soil in Lanzhou, with the proportion of Ni, Cu, and Co being 100% while the proportion of Cr, V, Pb, and As contents were 58.82%, 14.71%, 20.59%, and 2.94%, respectively. ② The results of source analysis showed that there were three major sources of heavy metal pollution in the topsoil of the parks in the study area. Source 1 is construction pollution, which contributes 56% of the Co present. Source 2 is traffic pollution, which contributes 44% and 52% of Cu and Pb, respectively. Source 3 is natural, and contributes 62%, 60%, 56%, and 56% of V, Cr, Ni, and As, respectively. Thus, this research showed that natural sources are predominant. ③ The weight correction effect for each heavy metal was significant; there was an approximately 44% reduction in both Cr and V, while the corrected weights of Ni, Cu, Pb, As, and Co increased in the order Co<Pb<Cu<Ni<As compared with the conventional weights. The most obvious change in weight was that of As, which increased by approximately 188%. ④ The results of the evaluation using the matter-element model showed that the state of 46% of the topsoil in the parks in the study area was grade Ⅴ (severely polluted), while 41% was grade Ⅳ (moderately polluted) and 3% was grade Ⅲ (lightly polluted); Co was the main pollutant. The results of the model evaluation were roughly the same as of from the PN and RI, indicating that the matter-element extension model can be used to evaluate heavy metal pollution in soil and the evaluation results are accurate and objective.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Pollution control Controlled terms:Cobalt - Heavy metals Uncontrolled terms:Evaluation results - Extension models - Heavy metal contents - Heavy metal pollution - Matter-element model - Potential ecological risk - Response coefficient - Traffic pollution Classification code:531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals Numerical data indexing:Percentage 1.00e+02%, Percentage 1.47e+01%, Percentage 1.88e+02%, Percentage 2.06e+01%, Percentage 2.94e+00%, Percentage 3.00e+00%, Percentage 4.10e+01%, Percentage 4.40e+01%, Percentage 4.60e+01%, Percentage 5.20e+01%, Percentage 5.60e+01%, Percentage 5.88e+01%, Percentage 6.00e+01%, Percentage 6.20e+01% DOI:10.13227/j.hjkx.202008168 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110403716 Title:Screening and Sequencing High-risk Antibiotics in China's Water Environment Based on Ecological Risks Title of translation:基于生态风险的我国水环境高风险抗生素筛选排序 Authors:Zhou, Li (1); Liu, Shan (1); Guo, Jia-Hua (1); Li, Qi (1) Author affiliation:(1) College of Urban and Environmental Sciences, Northwest University, Xi'an; 710127, China Corresponding author:Li, Qi(qili726@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2748-2757 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In view of the lack of ecotoxicological data for most antibiotics in China's water environment, national-scale ecological risk assessment of antibiotics remains impossible. This study determined the exposure index values for antibiotic products in the National Medical Products Administration based on quantity and average daily dose data for all antibiotics in the market alongside exposure modeling. The risk scores were calculated using data on the ecotoxicological effects of the antibiotics, and the species sensitivity distributions (SSD) method and apical effects. Priorities for control were identified based on the findings. Approximately 105 antibiotics were screened, and 53 were identified as candidate drugs with high national usage. Twenty antibiotics were identified for priority risk evaluation using a joint probabilistic model, with clarithromycin, ciprofloxacin, amoxicillin, cefaclor, and oxyfloxacin highlighted as presenting a high ecological risk. This study provides a scientific basis for the quantitative assessment of antibiotic risk prevention and control in China's aquatic environment.
© 2021, Science Press. All right reserved. Number of references:65 Main heading:Risk assessment Controlled terms:Antibiotics - Controlled drug delivery - Diagnosis - Ecology Uncontrolled terms:Aquatic environments - Ecological risk assessment - Ecotoxicological effects - Joint probabilistic - Quantitative assessments - Risk prevention and controls - Species sensitivity distributions - Water environments Classification code:454.3 Ecology and Ecosystems - 461.6 Medicine and Pharmacology - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202009275 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126254 Title:Contributors to Air Pollutant Emission Changes in Autumn and Winter in Beijing-Tianjin-Hebei and Surrounding Areas Title of translation:京津冀及周边地区秋冬季大气污染物排放变化因素解析 Authors:Tang, Qian (1); Zheng, Bo (2); Xue, Wen-Bo (1); Zhang, Qiang (3); Lei, Yu (1); He, Ke-Bin (4) Author affiliation:(1) Chinese Academy of Environmental Planning, Ministry of Ecology and Environment, Beijing; 100012, China; (2) Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Gif-sur-Yvette; 91191, France; (3) Department of Earth System Science, Tsinghua University, Beijing; 100084, China; (4) School of Environment, Tsinghua University, Beijing; 100084, China Corresponding author:Lei, Yu(leiyu@caep.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1591-1599 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the air pollution emission inventory technical methodology, this study conducted a quantitative analysis on the changes in major air pollutant emissions in Beijing-Tianjin-Hebei and its surrounding areas from the 'New Year Haze' in the autumn and winter of 2016-2017 to the 'Pandemic Haze' in the autumn and winter of 2019-2020. The contributions of the implementation of air pollution prevention and control policies and the COVID-19 pandemic to major air pollutant emission reductions were studied, and their impacts on the regional air quality under adverse meteorological conditions were simulated using an air quality model. The results showed that from the 'New Year Haze' in Dec 2016-Jan 2017 to the 'Pandemic Haze' in Jan-Feb 2020, the major air pollutant emissions in the region had dropped by approximately 50%, and the average concentration of PM2.5 was potentially reduced by more than 40% under adverse meteorological conditions. The most effective emission reduction measures included the clean heating project and raising the standards in key industrial sectors, such as the iron and steel industry, coal-fired boilers, and power plants, which contributed 67.1% and 53.4% of the emission reductions in SO2 and PM2.5, respectively. The COVID-19 pandemic predominantly affected the mobile sources and light industry, which contributed 71.9% and 68.2% of the emission reductions in NOx and VOCs, respectively. The implementation of air pollution prevention and control policies contributed substantially to the improvement of regional air quality, which effectively reduced the intensity and extent of the heavy pollution process under unfavorable meteorological conditions. The regional average PM2.5 concentration was reduced by 26%, and the number of days experiencing heavy pollution decreased by 44%. Due to the impacts of the COVID-19 pandemic, the average PM2.5 concentration in the region was reduced by an additional 24%, and the duration and extent of heavy pollution decreased even further.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Air quality Controlled terms:Cesium compounds - Coal fired boilers - Coal industry - Emission control - Environmental protection - Iron and steel industry - Quality control - Steelmaking - Sulfur dioxide Uncontrolled terms:Air pollutant emission - Air pollution prevention - Air quality modeling - Average concentration - Meteorological condition - PM2.5 concentration - Pollution emissions - Regional air quality Classification code:451.2 Air Pollution Control - 454.2 Environmental Impact and Protection - 503 Mines and Mining, Coal - 524 Solid Fuels - 545 Iron and Steel - 545.3 Steel - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 2.40e+01%, Percentage 2.60e+01%, Percentage 4.00e+01%, Percentage 4.40e+01%, Percentage 5.00e+01%, Percentage 5.34e+01%, Percentage 6.71e+01%, Percentage 6.82e+01%, Percentage 7.19e+01% DOI:10.13227/j.hjkx.202007218 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404621 Title:Sodium Alginate Loading of Zero-Valent Iron Sulfide for the Reduction of Cr(Ⅵ) in Water Title of translation:海藻酸钠负载硫化零价铁对水体中Cr(Ⅵ)的还原去除 Authors:Wang, Xu (1); Yang, Xin-Nan (1); Huang, Bi-Juan (1); Liu, Zhuang (1); Mu, Shi-Meng (1); Cheng, Min (1); Xie, Yan-Hua (1, 2) Author affiliation:(1) College of Ecology and Environment, Chengdu University of Technology, Chengdu; 610059, China; (2) State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu; 610059, China Corresponding author:Huang, Bi-Juan(huangbijuan13@cdut.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2908-2916 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, the functional material SZVI-SA is successfully prepared to efficiently remove Cr(Ⅵ) from water. This composite, with micron zero-valent iron (ZVI) as its core, is sulfurized and loaded by sodium alginate (SA). Some parameters affecting the Cr(Ⅵ) removal are also tested, including the type and mass fraction of chelating agents as well as S/Fe. SEM-EDS, TEM, XRD, and XPS are used to characterize and analyze the material. The results show that 7% Fe3+ is most suitable as the chelating agent for sodium alginate, and a S/Fe ratio of 3.5 and drying temperature of 70℃ are the ideal formation conditions. The effect of SZVI-SA on the removal of Cr(Ⅵ) is in line with the secondary adsorption rate model, mainly affected by the availability of binding sites. The active ingredient was identified as FeS, and the specific surface area can reach 97.83 m2•g-1. Many pores, especially micropores, are present in this material and in addition to Cr(Ⅵ), SZVI-SA was found to effectively remove Cr(Ⅲ) and Fe(Ⅲ) from the test solution. Overall, the Cr(Ⅵ)-removal efficiency was 92%; the removal mechanism is mainly via redox reactions; and the main reducing active substances are Fe2+, S2-, and S22-. Following the reaction of Fe(Ⅲ) and Cr(Ⅲ), Fe(OH)3 and Cr(OH)3 are formed and Cr2O3 precipitation separation occurs.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Chromium compounds Controlled terms:Binding sites - Chelation - Functional materials - Precipitation (chemical) - Redox reactions - Sodium - Sodium alginate - Sulfide minerals - Sulfur compounds Uncontrolled terms:Active ingredients - Adsorption rates - Drying temperature - Formation condition - Removal efficiencies - Removal mechanism - Zero-valent iron - Zerovalent irons Classification code:482.2 Minerals - 549.1 Alkali Metals - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Specific_Surface_Area 9.78e+04m2/kg DOI:10.13227/j.hjkx.202010051 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405089 Title:Applying Photochemical Indicators to Analyze Ozone Sensitivity in Handan Title of translation:基于光化学指标法的邯郸市臭氧生成敏感性 Authors:Niu, Yuan (1); Cheng, Shui-Yuan (1); Ou, Sheng-Ju (1); Yao, Shi-Yin (1); Shen, Ze-Ya (1); Guan, Pan-Bo (1) Author affiliation:(1) Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China Corresponding author:Cheng, Shui-Yuan(chengsy@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2691-2698 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Ozone pollution in Handan has become severe in recent years and in the summer of 2018, the average maximum daily 8-hour average ozone concentration in Handan was 175 μg•m-3 with a maximum of 257 μg•m-3. Ozone concentrations exceeded the National Air Quality Grade Ⅱ Standard in 59% of cases. In this study, the H2O2/HNO3 indicator was applied to analyze summertime ozone sensitivity in Handan using the WRF-CMAQ modeling system. The results showed that H2O2/HNO3 was more appropriate than other ozone indicators, both theoretically and based on simulation outputs. The good simulation effect of CMAQ on H2O2 and HNO3 was attributed to fine emission inventory and grid resolution. The H2O2/HNO3 simulation results showed that the relative importance of a VOCs-limited regime decreased month by month; a VOCs-NOx-mixed-limited regime was dominant in June; and a NOx-limited regime was more dominant in July and August than in June. The remarkable spatial difference in VOCs and NOx emission ratios among the counties of Handan led to differences in ozone sensitivity. The VOCs-limited regime was concentrated in counties where VOCs/NOx emission ratios were lower than 1.7. Southern counties had a NOx-limited regime, where VOCs/NOx emission ratios were higher than 6.9. Counties with VOCs/NOx emission ratios varying from 1.7 to 6.9 were more susceptible to both VOCs and NOx. According to these results, the transition range of HCHO/NO2, O3/HNO3, and O3/NOx ratios were adjusted to 0.35-0.6, 20-35, and 10-25 respectively. Adjusting the transition range of H2O2/(O3+NO2) was not effective, indicating that this indicator may not be applicable to Handan.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Ozone Controlled terms:Air quality - Hydrogen peroxide - Nitrogen oxides Uncontrolled terms:Emission inventories - Ozone concentration - Ozone sensitivity - Photochemical indicators - Simulation effects - Simulation outputs - Spatial differences - Summertime ozone Classification code:451.2 Air Pollution Control - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 5.90e+01%, Time 2.88e+04s DOI:10.13227/j.hjkx.202010243 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582349 Title:Community Characteristics of Methanogens and Methanogenic Pathways in Salt-tolerant Rice Soil Title of translation:耐盐碱水稻土壤产甲烷菌群落特征及产甲烷途径 Authors:Yang, Yu-Hong (1, 2, 3); He, Hui (4); Mi, Tie-Zhu (1, 2, 3); Liu, Yue-Teng (1, 3); Liu, Jia-Yin (5); Zhang, Guo-Dong (6); Li, Ming-Yue (7); Zhen, Yu (1, 2, 3) Author affiliation:(1) Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China; (2) Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266237, China; (3) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (4) College of Marine Life Sciences, Ocean University of China, Qingdao; 266003, China; (5) Qingdao Salt and Alkali Rice Research and Development Center, Qingdao; 266041, China; (6) Jiutian Wisdom Agricultural Group, Qingdao; 266003, China; (7) School of Resources and Environmental Engineering, Shandong University of Technology, Zibo; 255049, China Corresponding author:Zhen, Yu(zhenyu@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3472-3481 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
It is known that methanogens play a critical role in the carbon cycle in soil, while methanogen community characteristics and their environmental influencing factors in the soil planted with salt-tolerant rice remain unclear. In this study, methanogen abundance, community composition, and relationships with environmental factors in soils planted with the salt-tolerant rice (YC1703) and ordinary rice (Lindao 10) were evaluated in the rice improvement demonstration base of Qingdao Wisdom Agricultural Industry using real-time fluorescence quantitative PCR and Illumina high-throughput sequencing. The results indicated that the abundance and community richness of methanogens in Lindao 10 soil were significantly higher than those in YC1703 soil, and methanogens in YC1703 soil exhibited higher diversity. The combined effects of rice varieties, rice growth period, and environmental factors had impacts on the methanogen community. The hydrogenotrophic methanogens were dominant in the YC1703 and Lindao 10 soils; thus, we speculated that the dominant pathway of methane production in these soils was hydrogenotrophic methanogenesis.
© 2021, Science Press. All right reserved. Number of references:53 Main heading:Soils Controlled terms:Agricultural robots - Agriculture - Methanogens - Polymerase chain reaction Uncontrolled terms:Agricultural industries - Community composition - Environmental factors - High-throughput sequencing - Hydrogenotrophic methanogenesis - Hydrogenotrophic methanogens - Methane production - Methanogenic pathways Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202011138 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582430 Title:Identifying the Sources of Groudwater NO3--N in Agricultural Region of Qingdao Title of translation:青岛市农区地下水硝态氮污染来源解析 Authors:Kou, Xin-Yue (1); Ding, Jun-Jun (1); Li, Yu-Zhong (1, 2); Mao, Li-Li (1); Li, Qiao-Zhen (1); Xu, Chun-Ying (1); Zheng, Qian (1); Zhuang, Shan (1) Author affiliation:(1) Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (2) Environmental Stable Isotope Laboratory, Chinese Academy of Agricultural Sciences, Beijing; 100081, China Corresponding author:Li, Yu-Zhong(liyuzhong@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3232-3241 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To increase crops yields, applying large amounts of fertilizers has become increasingly common in agricultural regions, resulting in NO3--N groundwater pollution. Agricultural non-point pollution is the main source of groundwater NO3--N pollution. To ensure drinking water safety and quality, it is crucial to clarify the sources of NO3--N pollution in agricultural regions. In this study, 35 sampling sites were randomly selected in the Qingdao agricultural area in 2009 and 2019. The spatial distribution of NO3--N concentration was analyzed by the inverse distance weighting method (IDW). The nitrogen and oxygen isotopes were used as a tool to trace sources of NO3--N and the SIAR model was used to quantify contribution proportion of pollution sources. The results showed that the concentration of NO3--N (average) in groundwater in Qingdao has been reduced from 38.49 mg•L-1 in 2009 to 22.37 mg•L-1 in 2019, but it is still higher than the maximum allowable concentration of NO3--N in drinking water set by the World Health Organization (WHO). The NO3--N concentration gradually increased from south to north both in 2009 and 2019. The cross diagram of δ15N-NO3- and δ18O-NO3- show that the main sources of NO3--N in groundwater in Qingdao are chemical fertilizers, soil nitrogen, and manure and sewage. Water isotopes indicate that precipitation was the main source of groundwater in Qingdao. The SIAR model results indicated that the contribution of each source ranked as follows: manure and sewage (47.42%)>soil nitrogen (27.80%)>chemical fertilizer (14.32%)>atmospheric nitrogen depositions (10.43%). From 2009 to 2019, the quality of groundwater in Qingdao has been improved, but NO3--N pollution still cannot be ignored. According to the results, prevention and control should be made to ensure the safety of drinking water and the sustainable development of agriculture.
© 2021, Science Press. All right reserved. Number of references:65 Main heading:Groundwater pollution Controlled terms:Agricultural robots - Agriculture - Groundwater - Inverse problems - Isotopes - Manures - Nitrogen fertilizers - Potable water - Sewage Uncontrolled terms:Agricultural non-point pollution - Atmospheric nitrogen deposition - Chemical fertilizers - Inverse distance weighting method - Nitrogen and oxygen isotopes - Prevention and controls - Safety of drinking water - World Health Organization Classification code:444 Water Resources - 444.2 Groundwater - 452.1 Sewage - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes Numerical data indexing:Mass_Density 2.01e+00kg/m3 to 2.24e-02kg/m3, Mass_Density 3.85e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.04e+01%, Percentage 1.43e+01%, Percentage 2.78e+01%, Percentage 4.74e+01% DOI:10.13227/j.hjkx.202010263 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779727 Title:Temporal and Spatial Variations in Water Quality of Hanjiang River and Its Influencing Factors in Recent Years Title of translation:汉江中下游水质时空变异与驱动因素识别 Authors:Cheng, Bing-Fen (1, 2); Zhang, Yuan (1); Xia, Rui (1); Zhang, Nan (1, 2); Zhang, Xin-Fei (1, 2) Author affiliation:(1) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) College of Water Science, Beijing Normal University, Beijing; 100875, China Corresponding author:Xia, Rui(xiarui@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4211-4221 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Hanjiang River is the main water source and influence area of the Middle Route of the South to North Water Transfer Project. In recent years, the water quality and ecological environment in the middle and lower reaches of the Hanjiang River has become seriously degraded and water blooms occur frequently. Scientific identification of the temporal and spatial variations in water environment quality (and the main driving factors) has become an important management requirement for optimizing the upstream water transfer project. The temporal and spatial variations and influencing factors of water quality in the Hanjiang River basin were systematically analyzed, based on multi-source data and using the Daniel trend test, Mann Kendall test, K-means cluster analysis, dissimilarity analysis, and redundancy analysis. Results showed that: ① in recent years, the main stream of the Hanjiang River had generally good water quality, which was generally classified as class Ⅱ of GB 3838-2002, while the water quality of some sections in the middle and lower reaches was classified as class Ⅲ. However, the total phosphorus (TP) and total nitrogen (TN) load was relatively high, with 10 stations in the Hanjiang River basin showing averaged concentrations of 0.028-0.263 mg•L-1 and 0.630-1.852 mg•L-1, respectively, during 2014-2018. ② From 2004 to 2018, TP and TN at Zongguan station did not show significant variation, and other water quality indexes did not exhibit any regular patterns. The concentrations of TN, NH4+-N, and BOD5 in the dry season were higher than those in the wet season. In the wet season. the permanganate index showed different variation patterns, while TP concentration did not decrease significantly. ③ Different sections showed obvious differences in the variation of water quality indexes. However, the ten stations can be clustered into three categories: the upstream stations showed the best water quality, followed by the middle reaches, and the downstream stations showed the worst. The water quality at Xiaohe station improved significantly over the study period, which may be related to protection measures implemented in recent years, such as source control, emission reduction, and removal of aquaculture. ④ Water discharge and temperature were important factors affecting the water quality of the three regions in Hanjiang River. According to redundancy analysis, the contribution of discharge to water quality in the upstream and downstream areas was much larger, while the contribution of water temperature was greatest in the middle reaches of the river.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Rivers Controlled terms:Cluster analysis - Emission control - K-means clustering - Quality control - Redundancy - Water quality - Watersheds Uncontrolled terms:Dissimilarity analysis - Ecological environments - Protection measures - Redundancy analysis - South to North Water Transfer Project - Temporal and spatial variation - Water quality indexes - Water transfer projects Classification code:444.1 Surface Water - 445.2 Water Analysis - 451.2 Air Pollution Control - 723 Computer Software, Data Handling and Applications - 913.3 Quality Assurance and Control Numerical data indexing:Mass_Density 2.80e-05kg/m3 to 2.63e-04kg/m3, Mass_Density 6.30e-04kg/m3 to 1.85e-03kg/m3 DOI:10.13227/j.hjkx.202012074 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582438 Title:Spatio-temporal Distribution Characteristic and Risk Assessment of Heavy Metals in Soils Around Centralized Drinking Water Sources in Wuhan Title of translation:武汉集中式饮用水源地土壤重金属的时空分布特征及生态风险评价 Authors:Zhu, Jing (1); Hou, Yao-Zong (2); Zou, Shu-Cheng (1); Cao, Meng-Hua (2); Tu, Shu-Xin (2) Author affiliation:(1) Wuhan Ecological and Environmental Monitoring Center, Wuhan; 430022, China; (2) College of Resources and Environment, Huazhong Agriculture University, Wuhan; 430070, China Corresponding author:Cao, Meng-Hua(caomenghua@mail.hzau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3215-3222 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In the present study, the spatio-temporal distribution characteristics of heavy metals (Cd, Hg, As, Pb, Cr, Cu, Ni, and Zn) in soil around 19 centralized drinking water sources in Wuhan were investigated. Single-factor and comprehensive pollution indexes were used to determine soil pollution levels. The potential ecological hazard index was employed to evaluate soil potential ecological risks. The correlation and cluster analysis were conducted to identify pollution sources. The results showed that higher concentrations of heavy metals were present in soil from centralized drinking water source located in core area than suburb area of Wuhan. The concentrations of heavy metals in soil from centralized drinking water sources near the Yangtze River were higher than that in the sites near the tributaries of the Yangtze River. The average single potential ecological risk index of Hg, As, Pb, Cr, Cu, Ni, and Zn were lower than 40, which suggests a slight potential ecological risk. The average single potential ecological risk index of Cd was 80-160, which indicates a high potential ecological risk. The average comprehensive potential ecological risk index of heavy metals in soil around centralized drinking water sources in Wuhan was 142.12, which corresponded to a slight potential ecological risk. The correlation analysis showed that the sources of Cu, Pb, and Cr were similar and came from transport. The sources of Ni, As, Cr, and Cu were similar and could be attributed to metallurgical industries. The sources of Zn, Hg, and Cr were similar and could be related to antiseptic and catalytic industries. The long-term monitoring of Wuhan Dijiao and Baishazhou waterworks indicated that the concentrations of heavy metals around centralized drinking water sources in Wuhan were markedly decreased after 2017 and that ecological risk may be further reduced in the future.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:River pollution Controlled terms:Chromium metallurgy - Cluster analysis - Copper metallurgy - Heavy metals - Nickel metallurgy - Potable water - Risk assessment - Soil pollution - Soils Uncontrolled terms:Centralized drinking water sources - Correlation analysis - Heavy metals in soil - Long term monitoring - Metallurgical industry - Potential ecological hazards - Potential ecological risk - Spatiotemporal distributions Classification code:444 Water Resources - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 531.1 Metallurgy - 723 Computer Software, Data Handling and Applications - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202010196 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404672 Title:Spatiotemporal Distribution of Aerosol Optical Depth Based on Landsat Data in the Hinterland of the Guanzhong Basin and Its Relationship with Urbanization Title of translation:基于Landsat数据的关中盆地腹地AOD时空格局及城市化对其影响 Authors:Zheng, Yu-Rong (1, 2, 3); Wang, Xu-Hong (1, 2, 3); Zhang, Xiu (1, 2, 3); Hu, Gui-Gui (1, 2); Liang, Xiu-Juan (1, 2, 3); Niu, Lin-Zhi (1, 2, 3); Han, Hai-Qing (1, 2, 3) Author affiliation:(1) College of Urban and Environmental Science, Northwest University, Xi'an; 710127, China; (2) Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Northwest University, Xi'an; 710127, China; (3) Shaanxi Xi'an Urban Forest Ecosystem Research Station, Northwest University, Xi'an; 710127, China Corresponding author:Wang, Xu-Hong(jqy_wxh@nwu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2699-2712 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Aerosol optical depth (AOD) is one of the most fundamental optical properties of aerosols that characterizes the attenuation of light by aerosols and is an indicator of regional air pollution. Based on the blue band surface reflectance database from the MOD09A1 products for the period 2000-2019 and the ASTER spectral database, AOD was estimated from Landsat TM/OLI data using the deep blue algorithm (DB). Multi-year average/annual average and seasonal AOD values for the period 2000-2019 were then calculated to analyze the spatial characteristics and temporal variations of AOD using the empirical orthogonal function method (EOF). Furthermore, the impacts of urbanization on the spatio-temporal distribution of AOD were analyzed. The obtained results are summarized as follows: ① The multi-year average AOD spatial distribution in the hinterland of the Guanzhong Basin was significantly affected by topography and human activities, with higher AOD values and variationsin areas of low altitude and high-intensity human activities compared to the surrounding mountains. Thus, changes in AOD in the study area are mainly affected by anthropogenic factors. AOD also showed significant seasonal variations, whereby spring (0.34)>summer (0.33)>autumn (0.23)>winter (0.12), and the largest regional differences occurred in summer; ② The annual average AOD (from 2000-2019) showed the trend of "increase-decrease-increase", and reached a maximum in 2005, with the high AOD area gradually moving to the south. The distribution of AOD values in spring and summer was relatively discrete, while it is in a low-value agglomeration state in winter; ③ Three main AOD spatial distribution modes were identified based on the EOF, which had cumulative contribution rate of 83.0%. The spatial distribution trend of AOD showed regional consistency, with feature vectors consistent with the altitude, thus reflecting the difference of AOD at different altitudes. Taking the Qinling Mountains as the dividing line, the AOD presented the "north-south" pattern, AOD showed a "north-south" pattern, reflecting the uniqueness of the regional development in the Guanzhong Basin compared to the southern Qinling Mountains. The "southeast-northwest" distribution pattern indicated that the AOD presented a reverse change trend between urban and non-urban; and ④ The results of correlation analysis between the AOD and urbanization revealed a positive correlation with permanent population density (R2=0.707, P<0.05), impervious surface density (R2=0.377, P<0.05), and industrial POI density (R2=0.727, P<0.5). These results are significant for improving the monitoring of air quality in the Guanzhong Basin and for the construction of an urban ecological environment.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Spatial distribution Controlled terms:Aerosols - Air quality - Landforms - Optical properties - Orthogonal functions - Population statistics - Regional planning - Springs (components) - Supercomputers - Topography Uncontrolled terms:Aerosol optical depths - Anthropogenic factors - Ecological environments - Empirical orthogonal function methods - Optical properties of aerosols - Regional air pollution - Spatial characteristics - Spatiotemporal distributions Classification code:403.2 Regional Planning and Development - 451.2 Air Pollution Control - 481.1 Geology - 601.2 Machine Components - 722.4 Digital Computers and Systems - 741.1 Light/Optics - 921 Mathematics - 951 Materials Science Numerical data indexing:Percentage 8.30e+01% DOI:10.13227/j.hjkx.202010018 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404825 Title:Micro-morphological Characteristics of Particles on Holly and Ligustrum Leaf Surfaces and Seasonal Changes in Bacterial Communities Title of translation:冬青和女贞叶表面颗粒物微形态及叶际细菌群落结构 Authors:Li, Hui-Juan (1); Xu, Ai-Ling (1); Qiao, Feng-Lu (1); Jiang, Min (1); Song, Qi (1) Author affiliation:(1) Institute of Environment and Municipal Engineering, Qingdao University of Technology, Qingdao; 266033, China Corresponding author:Xu, Ai-Ling(xalcsu@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3063-3073 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The characteristics of particles and microorganisms on leaf surfaces have great significance for the near-surface environment and ecology. Here, fresh leaves of holly and Ligustrum were examined from different functional areas in Qingdao. Environmental scanning electron microscopy was used to observe particles and microorganisms on the leaf surfaces during different seasonal, and Illumina high-throughput sequencing was performed to analyze the phyllosphere bacterial community structure. The results showed that the retention of TSP on leaves in autumn and winter was higher than in spring and summer. The leaves of the two plants were more likely to retain PM10 and PM2.5; however, the dust retention capacity of holly leaves was higher than that of Ligustrum, especially for particle sizes greater than 10 μm. The numbers of particles on the leaf surfaces along an urban main road were higher than in two other locations, and were greatly affected by ground dust and automobile exhaust emissions. The community structure of phyllospheric microorganisms showed distinct seasonal variation, with different types of fungi, fungal spores, and mycelium observed on the leaf surfaces. Mycelium was more frequently detected on leathery leaves, and fungal spores with even folds were detected on the leaf epidermis of Ligustrum. The relative abundances of phyllospheric microorganisms were highest on leaves from an urban park, explained by a positive effect of humidity on growth. Significant differences in bacterial community abundance were observed between seasons. Specifically, bacterial abundance was highest in spring and lowest in summer. γ-Proteobacteria were the dominant bacteria, and the two plants shared a similar core microbial community. In addition, the phyllospheric bacterial community structure of leaves from urban arterial roads with ground dust pollution was significantly different from the leaves collected from other city areas. Our research results suggest a significant correlation between the leaf-surface particles and microbial community structure on representative plants in different areas of the city, which provides reference information for urban greening activities.
© 2021, Science Press. All right reserved. Number of references:58 Main heading:Bacteria Controlled terms:Dust - Fungi - Particle size analysis - Scanning electron microscopy - Springs (components) - Urban growth Uncontrolled terms:Automobile exhaust emissions - Bacterial community structure - Community structures - Environmental scanning electron microscopies (ESEM) - High-throughput sequencing - Microbial communities - Microbial community structures - Morphological characteristic Classification code:403.1 Urban Planning and Development - 451.1 Air Pollution Sources - 601.2 Machine Components - 951 Materials Science Numerical data indexing:Size 1.00e-05m DOI:10.13227/j.hjkx.202010220 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247476 Title:Characteristics and Origins of Heavy Metals in Soil and Crops in Mountain Area of Southern Sichuan Title of translation:川南山区土壤与农作物重金属特征及成因 Authors:Han, Wei (1, 2, 3); Wang, Cheng-Wen (1, 2, 3); Peng, Min (1, 2, 3); Wang, Qiao-Lin (1, 2, 3); Yang, Fan (1, 2, 3); Xu, Ren-Ting (1, 2, 3) Author affiliation:(1) Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Science, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Science, Langfang; 065000, China Corresponding author:Wang, Qiao-Lin(wangqiaolin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2480-2489 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Excessive heavy metals in soils and crops will affect the human living environment and health. In order to study the enrichment characteristics and causes of heavy metals in soils and crops in a mountainous area of southern Sichuan, 1699 cultivated soil samples, 30 rice seed samples, 31 corn seed samples, 15 tea samples, and 76 crop root soil samples were collected. The enrichment characteristics and origins of heavy metals in the soil were studied using mathematical statistics, principal component analysis, and correlation analysis. The enrichment characteristics of heavy metals in crops and their correlations with root soil were discussed. The results showed that the content of heavy metals in cultivated soil was higher than the national soil background value, and many sampling points exceeded the risk screening value. Among them, 770 points of Cd, 176 points of Cu, 116 points of Cr, and 106 points of Ni exceeded the standard. Combining the factor analysis results, it was found that Cd, Cr, Cu, Ni, and Zn in cultivated soil mainly originated from the geological background, and Cd was also affected by soil organic matter and pH. Meanwhile, Hg and Pb were mainly related to human activities. The results showed that the contents of heavy metals in the crops were lower than the national standards; the enrichment coefficients of heavy metals in crops were generally small, and were mainly in the following order: tea>rice>corn. The correlation analysis of the heavy metal contents in the root soil and crops showed that there was no significant correlation among them. Thus, the heavy metals in the soil generally had a high content and low activity, which did not affect the quality and safety of the three crops. However, Cu in corn and CaO in root soil, As in corn seed and Fe2O3 in root soil, and Ni in corn seed and Fe2O3 in root soil showed significant correlations, whereas As in rice seed and CaO in root soil and Hg in rice seed and MgO in root soil showed significant correlations, and no significant correlations were found in tea.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Soils Controlled terms:Calcium oxide - Correlation methods - Crops - Heavy metals - Hematite - Magnesia - Metal analysis - Nickel - Seed - Soil surveys - Statistics - Tea Uncontrolled terms:Correlation analysis - Enrichment characteristics - Enrichment coefficients - Geological background - Heavy metal contents - Heavy metals in soil - Quality and safeties - Soil organic matters Classification code:482.2 Minerals - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 548.1 Nickel - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202008257 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404326 Title:Concentrations, Sources, and Health Risks of PM2.5 Carrier Metals in the Beijing Urban Area and Suburbs Title of translation:北京大气PM2.5载带金属浓度, 来源及健康风险的城郊差异 Authors:Zhou, An-Qi (1); Liu, Jian-Wei (1, 2); Zhou, Xu (1); Bi, Si-Qi (1); Zhang, Bo-Han (1); Gao, Yue (1); Cao, Hong-Bin (1) Author affiliation:(1) Faculty of Geographical Science, Beijing Normal University, Beijing; 100875, China; (2) College of Resources and Environment, Henan Agricultural University, Zhengzhou; 450046, China Corresponding author:Cao, Hong-Bin(caohongbin@bnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2595-2603 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the differences in pollution characteristics, sources, and health risks of PM2.5 carrier metals in urban and suburban areas in Beijing, daily PM2.5 samples were collected from Haidian and Daxing from June to November 2017 and the concentration of PM2.5 and 13 constituent metals were analyzed. The sources of these 13 metal elements were analyzed by positive matrix factorization (PMF), and the health hazards of a subset of 9 metals were evaluated using health risk assessment. The results showed that the concentrations of PM2.5 and 10 metal concentrations in the urban area including Cr, Co, Mn, and Ni were significantly different from those in suburban areas (P<0.05). The source analysis results show four key sources, although their relative contributions vary slightly between urban and rural areas. In urban areas, the main sources are motor vehicles (51.2%), coal burning (19.1%), dust (19.3%), and fuel oil (10.4%); in the suburbs, sources are motor vehicles (47.9%), coal burning (22.6%), dust (20.2%), and electroplating (9.3%). The results of the health risk assessment showed that all metal HQ values in the suburbs were less than 1, and there was no non-carcinogenic risk. Ni and Pb in urban areas, and Cd, Co, Ni, and Pb in suburban areas, do not present a cancer risk, while the R values of As (2.77×10-5), Cd (2×10-6), Co (1.76×10-6), and Cr(Ⅵ) (7.88×10-6) in urban areas and As (8.34×10-6) and Cr(Ⅵ) (4.94×10-6) in suburban areas present some risk of cancer.
© 2021, Science Press. All right reserved. Number of references:66 Main heading:Risk assessment Controlled terms:Coal dust - Diseases - Factorization - Health hazards - Health risks - Metals Uncontrolled terms:Carcinogenic risk - Metal concentrations - Metal elements - Positive Matrix Factorization - Relative contribution - Source analysis - Urban and rural areas - Urban and suburban areas Classification code:461.7 Health Care - 503 Mines and Mining, Coal - 524 Solid Fuels - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 1.04e+01%, Percentage 1.91e+01%, Percentage 1.93e+01%, Percentage 2.02e+01%, Percentage 2.26e+01%, Percentage 4.79e+01%, Percentage 5.12e+01%, Percentage 9.30e+00% DOI:10.13227/j.hjkx.202010201 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688818 Title:Characteristics and Sources of Water-soluble Ion Pollution in PM2.5 in Winter in Shenyang Title of translation:沈阳市冬季大气PM2.5中水溶性离子污染特征及来源解析 Authors:Wang, Guo-Zhen (1); Ren, Wan-Hui (2); Yu, Xing-Na (1); Hou, Si-Yu (1); Zhang, Yu-Xiu (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Shenyang Ecological and Environmental Monitoring Center of Liaoning Province, Shenyang; 110000, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:30-37 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the characteristics of PM2.5 and water-soluble ions in Shenyang in winter, the URG-9000D online monitoring system was used to continuously sample PM2.5 and gas components during 2018. The results indicated that the average concentration of PM2.5 in Shenyang during the sampling period was 80.67 μg•m-3, and the total water-soluble ion concentration ranged from 2.68 to 132.79 μg•m-3. Compared with clean days, the proportion of NO3-, SO42-, and NH4+ (SNA) in polluted days increased significantly, reached 43.7% of PM2.5. The rapid accumulation of SO2 in a short period of time made atmospheric PM2.5 explosively increase in Shenyang in winter. A Pearson correlation analysis showed that the correlation coefficients of SNA, Cl-, and PM2.5 were all above 0.78, indicating that the main contribution components of winter PM2.5 in Shenyang were SNA and Cl-. The apportionment of PMF sources indicated that the sources of pollutants in winter in Shenyang mainly included secondary reaction sources, coal and biomass combustion sources, and dust sources.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Water pollution Controlled terms:Coal combustion - Coal dust - Correlation methods - Ions - Sulfur dioxide Uncontrolled terms:Average concentration - Biomass combustion - Correlation coefficient - On-line monitoring system - Pearson correlation analysis - Sampling period - Secondary reactions - Water-soluble ions Classification code:453 Water Pollution - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.2 Inorganic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Percentage 4.37e+01% DOI:10.13227/j.hjkx.202006249 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804503 Title:Review of Screening and Applications of Organic Tracers in Fine Particulate Matter Title of translation:颗粒物有机源示踪物的筛选与应用综述 Authors:Li, Yuan-Ju (1, 2); Wu, Ai-Hua (1); Tong, Meng-Xue (1); Luan, Sheng-Ji (1); Li, Zhi (1) Author affiliation:(1) Shenzhen Institute, Peking University, Shenzhen; 518057, China; (2) State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China Corresponding author:Wu, Ai-Hua(IERespc@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:1013-1022 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Specific organic compounds within atmospheric particulate matter are indicators of specific pollution sources and, as such, can be used to differentiate inputs from various air pollution emissions sources in urban areas. Therefore, many studies have been conducted to detect organic particulate matter and screen the associated organic tracers that provide provenance information. This review provides a brief summary of the emission characteristics of biomass burning, cooking, fossil fuel combustion, and traffic. The particular marker compounds that carry provenance information for these four emission sources are discussed and diagnostic ratios are calculated to discuss the use of organic tracers in source apportionment. The shortcomings and new directions of using source tracer screening are also discussed.
© 2021, Science Press. All right reserved. Number of references:67 Main heading:Particles (particulate matter) Controlled terms:Air pollution - Fossil fuels - Tracers Uncontrolled terms:Atmospheric particulate matter - Diagnostic ratios - Emission characteristics - Fine particulate matter - Fossil fuel combustion - Organic particulate matters - Pollution emissions - Source apportionment Classification code:451 Air Pollution - 951 Materials Science DOI:10.13227/j.hjkx.202006164 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688825 Title:Improved Regression Kriging Prediction of the Spatial Distribution of the Soil Cadmium by Integrating Natural and Human Factors Title of translation:融合自然-人为因子改进回归克里格对土壤镉空间分布预测 Authors:Gao, Zhong-Yuan (1); Xiao, Rong-Bo (1); Wang, Peng (1); Deng, Yi-Rong (2); Dai, Wei-Jie (1); Liu, Chu-Fan (1) Author affiliation:(1) School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou; 510006, China; (2) Guangdong Provincial Academy of Environmental Science, Guangzhou; 510045, China Corresponding author:Xiao, Rong-Bo(ecoxiaorb@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:343-352 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Mastering the spatial distribution of heavy metals in the soil plays an important supporting role in the scientific formulation of soil pollution risk management and control strategies. Few factors were considered and multiple collinearity between parallel variables existed,resulting in low prediction accuracy. OK (common Kriging method), NRK (regressive Kriging method based on natural factors only), and NARK (regressive Kriging based on natural-human factors)were used to simulate the spatial distribution of soil Cd by selecting 23 natural-artificial influencing factors. The prediction accuracy was evaluated based on an empirical study of the area around Shaoguan Qujiang smelter. The results showed that the above-standard rate of soil cadmium in this area reached 85.93%, and the effect on the spatial heterogeneity of soil cadmium was shown as air emissions from smelters>air emissions from steel plants>pH>organic matter>Euclidean distance to road>Euclidean distance to river. The root-mean-square error and average absolute error of NARK's prediction results for soil cadmium were 26.86% and 30.56% lower than that of the OK method, respectively. The model determination coefficient R2 increased from 0.78 to 0.88. Compared with that of NRK, it was reduced by 24.15% and 24.23% and R2 increased from 0.81 to 0.88. The NRK combining natural and human factors significantly improved the simulation accuracy of the spatial distribution of soil cadmium, and the addition of human factors as auxiliary variables, especially atmospheric point source pollution emissions, greatly contributed to the improvement of the model accuracy.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Soil pollution Controlled terms:Air pollution - Cadmium - Forecasting - Human engineering - Interpolation - Mean square error - Risk management - River pollution - Soil pollution control - Soil surveys - Soils - Spatial distribution - Steelmaking Uncontrolled terms:Auxiliary variables - Average absolute error - Management and controls - Model determination - Point source pollution - Root mean square errors - Simulation accuracy - Spatial heterogeneity Classification code:451 Air Pollution - 453 Water Pollution - 461.4 Ergonomics and Human Factors Engineering - 483.1 Soils and Soil Mechanics - 545.3 Steel - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 921 Mathematics - 921.6 Numerical Methods - 922.2 Mathematical Statistics Numerical data indexing:Percentage 2.41e+01%, Percentage 2.42e+01%, Percentage 2.69e+01%, Percentage 3.06e+01%, Percentage 8.59e+01% DOI:10.13227/j.hjkx.202005139 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003393 Title:Concentrations and Patterns of Atmospheric Particulate Nitrogen and Phosphorus During Different Weather Conditions in Qingdao Coastal Region Title of translation:青岛近海不同污染过程下大气颗粒态氮磷浓度分布特征 Authors:Yuan, Gang (1, 2); Qi, Jian-Hua (1, 2); Ding, Xue (1) Author affiliation:(1) Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China; (2) Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266237, China Corresponding author:Qi, Jian-Hua(qjianhua@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1280-1297 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Total suspended particulate (TSP) samples were continuously collected in the Qingdao coastal region from March 2018 to October 2019. The concentrations of dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), dissolved total nitrogen (DTN), dissolved total phosphorus (DTP), total nitrogen (TN), and total phosphorus (TP) in the samples were (7.13±6.59) μg•m-3, (17.42±9.88) ng•m-3, (8.34±7.03) μg•m-3, (25.59±13.67) ng•m-3, (10.68±10.59) μg•m-3, and (76.34±51.79) ng•m-3, respectively. The results showed that the concentrations of different nitrogen and phosphorus species in aerosols varied significantly during the sampling period due to the influence of emission intensity, air mass source, and meteorological conditions. The concentrations of DIN, DTN, and TN were the highest in autumn followed by spring, winter, and summer, showing similar seasonal variations. However, TP showed the highest concentration in spring and the lowest in summer. The concentrations of DIN, DTN, and TN on haze days were 4.3, 3.8, and 4.5 times higher than on non-haze reference days, respectively, and DIP, DTP, and TP concentrations were 1.9, 1.9, and 1.2 times higher, respectively. During the heating period, the DIN/DTN ratio on haze days was (92.65±4.09)%, which was 8.87% higher than on non-haze days. During the non-heating period, the DIN/DTN ratio was (80.52±8.42)%, which was 4.83% higher than the reference days. However, the average DTN/TN ratio on haze days was significantly lower than on non-haze days; the average DTN/TN ratio on haze days was (73.41±12.18)% and (80.36±4.72)% during the heating and non-heating period, respectively, and were 13.35% and 5.92% lower, respectively, on non-haze days. The proportion of DIP to DTP on hazy days increased by only 1.47% relative to non-haze days, while the DIP/DTP ratio varied between hazy days. Due to the influence air mass sources, relative humidity, and atmospheric acidification process, the DTP/TP ratio on haze days increased by 10.58% relative to non-haze days. The concentrations of DIN, DTN, and TN in aerosols affected by dust events were 2.5, 2.6, and 2.6 times higher than on non-dust days, while DIP, DTP, and TP were 4.0, 2.8, and 7.2 times higher, respectively.
© 2021, Science Press. All right reserved. Number of references:75 Main heading:Particles (particulate matter) Controlled terms:Aerosols - Atmospheric humidity - Coastal zones - Dissolution - Dust - Heating - Nitrogen - Phosphorus - Springs (components) Uncontrolled terms:Atmospheric particulate - Dissolved inorganic nitrogens - Dissolved inorganic phosphorus - Emission intensity - Meteorological condition - Nitrogen and phosphorus - Seasonal variation - Total suspended particulates Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 471 Marine Science and Oceanography - 601.2 Machine Components - 802.3 Chemical Operations - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Percentage 1.06e+01%, Percentage 1.33e+01%, Percentage 1.47e+00%, Percentage 4.83e+00%, Percentage 5.92e+00%, Percentage 8.87e+00% DOI:10.13227/j.hjkx.202007241 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003424 Title:Accelerated Degradation of Aqueous Recalcitrant Iodinated Contrasting Media Using a UV/SO32- Advanced Reduction Process Title of translation:紫外/亚硫酸盐高级还原工艺加速降解水中难降解含碘造影剂 Authors:Liu, Zi-Qi (1, 2); Qiu, Fu-Guo (1); Lai, Man-Ting (3); Li, Jin (3); Dong, Hui-Yu (2); Qiang, Zhi-Min (2) Author affiliation:(1) College of Environmental Science and Engineering, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) College of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China Corresponding authors:Qiu, Fu-Guo(qiufuguo@bucea.edu.cn); Dong, Hui-Yu(hydong@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1443-1450 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the formation of free radical-hydrated electrons by the activation of sulfite (SO32-), the UV/SO32- process is an advanced reduction process that can reduce pollutants. This study investigated the degradation kinetics, mechanism, influencing factors, and degradation pathways of sodium diatrizoate (DTZ), an iodinated contrasting media, during the UV/SO32- process. The degradation kinetics of DTZ were well fitted by the pseudo-first-order model, the degradation rate of which was higher than that of UV only and UV/H2O2. The degradation rate of DTZ during the UV/SO32- process was positively correlated with the initial SO32- concentration. Weakly alkaline and alkaline conditions promoted the degradation of DTZ, while organic matter inhibited degradation during the UV/SO32- process. The degradation mechanism included direct photolysis and free radical attack, whereby free radical attack played a more important role than direct photolysis. Sulfite radicals dominated DTZ degradation efficiency, and hydrated electrons controlled the deiodination efficiency. The degradation pathways of DTZ during the UV/SO32- process included substitution, decarboxylation-hydroxylation, and amide bond cleavage.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Photodegradation Controlled terms:Amides - Carboxylation - Degradation - Efficiency - Free radicals - Hydration - Photolysis - Sulfite process Uncontrolled terms:Accelerated degradation - Alkaline conditions - Degradation efficiency - Degradation kinetics - Degradation mechanism - Degradation pathways - Hydrated electron - Pseudo-first-order Classification code:802.2 Chemical Reactions - 804.1 Organic Compounds - 811.1.1 Papermaking Processes - 913.1 Production Engineering DOI:10.13227/j.hjkx.202007274 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688826 Title:Characterization and Source Apportionment of Atmospheric VOCs in Tianjin in 2019 Title of translation:2019年天津市挥发性有机物污染特征及来源 Authors:Gao, Jing-Yun (1); Xiao, Zhi-Mei (1); Xu, Hong (1); Li, Li-Wei (1); Li, Peng (1); Tang, Miao (1); Yang, Ning (1); Li, Yuan (1); Bi, Wen-Kai (1); Chen, Kui (1) Author affiliation:(1) Tianjin Eco-Environmental Monitoring Center, Tianjin; 300191, China Corresponding authors:Tang, Miao(tangmiao32@163.com); Chen, Kui(kuichen@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:55-64 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The characterization and source apportionment of atmospheric volatile organic compounds (VOCs) in Tianjin in 2019 were investigated based on high-resolution online monitoring data observed at an urban site in Tianjin. The results showed that the average annual concentration of VOCs was 48.9 μg•m-3, and seasonal concentrations followed with winter (66.9 μg•m-3)>autumn (47.9 μg•m-3)>summer (42.0 μg•m-3)>spring (34.6 μg•m-3). The chemical compositions of the VOCs were alkanes, aromatics, alkenes, and alkynes, which accounted for 65.0%, 17.4%, 14.6%, and 3.0% of the VOCs concentrations on average, respectively. The proportion of alkanes, aromatics, and alkynes was the highest in autumn, summer, and winter, respectively, while a higher alkenes proportion was observed in summer and winter. The ozone formation potential contribution of alkanes, alkenes, aromatics, and alkynes in spring and summer was 16.9%, 48.6%, 33.5%, and 1.0%, respectively, and the species with higher contributions were ethene, propylene, m,p-xylene, 1,2,3-trimethylbenzene, toluene, isoprene, trans-2-butene, cis-2-pentene, o-xylene, and m-ethyltoluene. During autumn and winter, the aromatics contributed as much as 91.5% to the secondary organic aerosol (SOA) formation potential, and o-xylene, toluene, m,p-xylene, ethylbenzene, o-ethyltoluene, and benzene were the main contributing species. Positive matrix factorization was applied to estimate VOCs source contributions, and automobile exhaust, liquefied petroleum gas/natural gas (LPG/NG) and gasoline evaporation, solvent usage, petrochemical industrial emissions, combustion, and natural sources were identified as major sources of VOCs in spring and summer, accounting for 29.2%, 19.9%, 16.4%, 10.3%, 7.3%, and 6.6%, respectively. While in autumn and winter, the contributions of LPG/NG and gasoline evaporation, automobile exhaust, combustion, solvent usage, and petrochemical industrial emissions were 32.4%, 21.9%, 18.5%, 13.3%, and 8.4%, respectively. Compared to the source contributions in spring and summer, a significant increase was observed for LPG/NG and combustion emission of 62.8% and 153.4%, respectively, and other sources decreased by 18.4%-25.0% in autumn and winter. Source composition spectrums showed that the petrochemical industry and solvent usage were the main emission sources of alkenes and aromatics in spring and summer, and combustion and solvent usage were the main emission sources of aromatics in autumn and winter. Thus, focus should be played on the petrochemical industry and solvent usage in spring and summer and on combustion and solvent usage in autumn and winter to further prevent and control ozone and SOA in Tianjin.
© 2021, Science Press. All right reserved. Number of references:53 Main heading:Liquefied petroleum gas Controlled terms:Aromatization - Atmospheric chemistry - Combustion - Ethylene - Evaporation - Factorization - Fiber optic sensors - Gas emissions - Gasoline - Industrial emissions - Ozone - Paraffins - Petrochemical plants - Petrochemicals - Solvents - Springs (components) - Superconducting tapes - Toluene - Urban growth - Volatile organic compounds - Xylene Uncontrolled terms:1 ,2 ,3-trimethylbenzene - Chemical compositions - Combustion emissions - Ozone formation potentials - Petrochemical industry - Positive Matrix Factorization - Secondary organic aerosols - Source contributions Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 523 Liquid Fuels - 601.2 Machine Components - 708.3 Superconducting Materials - 741.1.2 Fiber Optics - 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.00e+00%, Percentage 1.03e+01%, Percentage 1.33e+01%, Percentage 1.46e+01%, Percentage 1.53e+02%, Percentage 1.64e+01%, Percentage 1.69e+01%, Percentage 1.74e+01%, Percentage 1.84e+01% to 2.50e+01%, Percentage 1.85e+01%, Percentage 1.99e+01%, Percentage 2.19e+01%, Percentage 2.92e+01%, Percentage 3.00e+00%, Percentage 3.24e+01%, Percentage 3.35e+01%, Percentage 4.86e+01%, Percentage 6.28e+01%, Percentage 6.50e+01%, Percentage 6.60e+00%, Percentage 7.30e+00%, Percentage 8.40e+00% DOI:10.13227/j.hjkx.202006257 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688845 Title:How Different Ratios of Straw Incorporation to Nitrogen Fertilization Influence Endogenous and Exogenous Carbon Release from Agricultural Soils Title of translation:秸秆与氮肥配比对农田土壤内外源碳释放的影响 Authors:Sun, Zhao-An (1, 2); Zhang, Xuan (2); Hu, Zheng-Jiang (3); Wang, Kai-Yong (3); Chen, Qing (2); Meng, Fan-Qiao (2) Author affiliation:(1) Key Laboratory of Biochemistry and Molecular Biology in University of Shandong, College of Biological and Agricultural Engineering, Weifang University, Weifang; 261061, China; (2) Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100094, China; (3) Agricultural Bureau of Huantai County, Huantai; 256400, China Corresponding author:Meng, Fan-Qiao(mengfq@cau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:459-466 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The adjustment of the C/N ratio by straw combined with fertilizer nitrogen (N) not only affects straw decomposition but also affects soil organic carbon (SOC) decomposition, i.e. the priming effects. Therefore, it is doubly important to study how the ratios of straw to N fertilizer influence the release of endogenous and exogenous C for greenhouse gas emission reduction and soil fertility improvement. We conducted a 32-week laboratory incubation experiment with 13C labeled maize straw under different N levels in farmland soil collected from fields in Huantai County to investigate the effect of the ratios of straw to N fertilizer on straw decomposition and the priming effects. Four treatments were set up, including CK, corn straw (S), corn straw+low urea rates (SN1), and corn straw+high urea rates (SN2). Dynamic sampling was conducted during the early stage (0-10 d), the middle stage (11-43 d), and the later stage (44-224 d) of straw decomposition. The approach was based on using a two-source mixing model to differentiate two sources of soil CO2 (straw and soil-derived C). With an increase in the incubation time, the contribution of SOC decomposition to soil CO2 emissions first decreased and then increased. On the contrary, the contribution of straw mineralization to soil CO2 emissions first increased and then decreased. By the end of the incubation time, the contribution of SOC and straw decomposition to soil CO2 emissions was 0.84-0.86 and 0.14-0.16, respectively. Over the whole incubation period, the effects of N fertilization on straw decomposition first increased and then decreased. The promotion degree of high and low N fertilization on straw decomposition was up to 15.8% and 7.9%, respectively. Over the whole incubation period, the inhibition degree of low N fertilization reached up to 7.1%, while high N fertilization showed a slight promotion trend of 0.7%. Therefore, the regulation of C:N by straw combined with fertilizer N not only affected the contribution of exogenous straw to SOC but also influenced the decomposition of endogenous SOC, and then influenced soil C fixation. Over the whole incubation period, straw C retention could not compensate for CO2 released by the priming effects, which led to a net loss of SOC.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Nitrogen fertilizers Controlled terms:Carbon dioxide - Emission control - Greenhouse gases - Metabolism - Organic carbon - Soils - Urea Uncontrolled terms:Agricultural soils - Dynamic sampling - Greenhouse gas emission reduction - Incubation periods - Incubation time - Nitrogen fertilization - Soil organic carbon - Straw incorporations Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally Numerical data indexing:Percentage 1.58e+01%, Percentage 7.00e-01%, Percentage 7.10e+00%, Percentage 7.90e+00% DOI:10.13227/j.hjkx.202004232 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688820 Title:Metagenomic Analysis Provides Insights into Bacterial Communities, Antibiotic Resistomes, and Public Health Risks in the Dongping Lake Reservoir Title of translation:基于宏基因组学探讨东平湖水库的菌群结构,耐药基因谱及其公共健康风险 Authors:Zhang, Hong-Na (1); Cui, Na (1); Shen, Hong-Miao (1) Author affiliation:(1) College of Biological Science and Engineering, Hebei University of Economics and Business, Shijiazhuang; 050061, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:211-220 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Owing to the long residence times of water, water reservoirs readily contribute to the accumulation of antibiotic resistant gene (ARG). It is of great public health significance to explore bacterial communities, antibiotic resistomes, and the potential public health risks of water reservoirs. In this study, metagenomic sequencing was used to analyze and compare the bacterial communities, ARG profiles, ARG-horizontal transfer, and ARG-carrying pathogens in the water and sediments of the Dongping Lake Reservoir in the dry and the wet seasons. Compared with that of the sediments, the results showed that both the bacterial communities and ARG profiles in the water were significantly influenced by the seasons, and the total ARG abundance in the dry season was significantly higher than that in the wet season. The total ARG abundance in the sediments was higher than that in water, but the horizontal transfer potential of ARG in the water was higher than that in the sediment. A total of 377 ARG subtypes belonging to 20 ARG types were found in this study. Bacitracin and vancomycin resistance genes were the main ARG types in the water and sediments, respectively, and Proteobacteria and Actinobacteria were the major ARG-carrying bacteria in the water and sediments, respectively. In addition, 30 clinical pathogens carrying ARGs were identified, including Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella enterica, and Acinetobacter bohemicus. More importantly, two Escherichia coli concurrently carried virulence factor and ARG. In summary, this study revealed that a variety of ARG types existed in the Dongping Lake Reservoir, which has posed potential public health risks by contributing to the horizontal transfer of ARG and the accumulation of clinical pathogens. Therefore, it is necessary to regularly monitor the bacterial community and ARG profile in various water bodies.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Reservoirs (water) Controlled terms:Antibiotics - Escherichia coli - Genes - Health risks - Lakes - Public health - Public risks - Risk assessment - Salmonella - Sediments Uncontrolled terms:Antibiotic-resistant genes - Bacterial community - Health significances - Horizontal transfer - Klebsiella pneumoniae - Long residence time - Metagenomic analysis - Pseudomonas aeruginosa Classification code:441.2 Reservoirs - 461 Bioengineering and Biology - 483 Soil Mechanics and Foundations - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202005305 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126215 Title:Spectral Characteristics and Sources of Dissolved Organic Matter from Landscape River During Flood Season in Suzhou Based on EEMs and UV-vis Title of translation:基于EEMs与UV-vis分析苏州汛期景观河道中DOM光谱特性与来源 Authors:He, Jie (1, 2); Zhu, Xue-Hui (3); Wei, Bin (4); Li, Xue-Yan (1, 2); Tang, Ru-Tao (1, 2); Lin, Xin (1, 2); Zhou, Fei (1, 2); Si, Zhuang-Zhuang (1, 2) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Environment Biotechnology Research Institute, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) Jiangsu Universum Testing Technology Service Co. Ltd., Suzhou; 215300, China; (4) Suzhou Hongyu Environmental Technology Co. Ltd., Suzhou; 215011, China Corresponding author:Li, Xue-Yan(lxyhit@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1889-1900 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on excitation emission matrix spectroscopy (EEMs) technology combined with the parallel factor analysis (PARAFAC) and UV-vis spectra, the spectral characteristics and sources of dissolved organic matter (DOM) from a landscape river were analyzed during different periods of the flood season in Suzou. Four fluorescent components were identified using the PARAFAC model, including two humus-like components (C1, C4) and two protein-like components (C2, C3), with a significant correlation coefficient (P<0.01) in C2 and C3/C4 and C3 and C4, respectively. During the early flood season, the total fluorescence intensity of the DOM in the river was relatively higher due to the influence of initial rainwater but reduced significantly towards the middle and late flood season. The fluorescence characteristic parameters indicated that the autochthonous contribution of DOM were substantial during the early stages of the flood season. On the contrary, there were increased levels of DOM largely from terrestrial origins during the middle flooding period. During the entire flood season, SUVA254, SUVA260, and E2/E3 exhibited the same trend, that is, decreasing first and then increasing. As a result of the continuous heavy rainfall during the flood season, the nitrogen and phosphorus nutrient content in the channel increased. The algae population did not proliferate in large quantities because of the strong hydrodynamic conditions experienced throughout the flood season. The fluorescence components C2, C3, and C4 exhibited a significant correlation coefficient (P<0.01) with the characteristic parameters (FI, HIX, BIX, and β:α). All the fluorescence components had a high correlation (P<0.05) with DOC. There was a considerable correlation between fluorescence component C1 and Chla. The principal component analysis revealed that the DOM components in the landscape river during different periods of the flood season exhibited notable differences, and the continuous heavy rainfall during the flood season has a substantial influence on the content of C2, C3, and C4 components in the water body.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Floods Controlled terms:Biogeochemistry - Fluorescence - Organic compounds - Rain - Rivers - Soils Uncontrolled terms:Correlation coefficient - Dissolved organic matters - Excitation emission matrices - Fluorescence characteristics - Fluorescence intensities - Nitrogen and phosphorus - Parallel factor analysis - Spectral characteristics Classification code:443.3 Precipitation - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 741.1 Light/Optics - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202009087 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003306 Title:Bioaccumulation and Translocation Characteristics of Heavy Metals in a Soil-Maize System in Reclaimed Land and Surrounding Areas of Typical Vanadium-Titanium Magnetite Tailings Title of translation:钒钛磁铁矿尾矿库复垦土地及周边土壤-玉米重金属迁移富集特征 Authors:Sun, Hou-Yun (1, 2); Wei, Xiao-Feng (2); Sun, Xiao-Ming (1, 3); Jia, Feng-Chao (2); Li, Duo-Jie (2); Li, Jian (2) Author affiliation:(1) School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing; 100083, China; (2) Beijing Institute of Geology for Mineral Resources, Beijing; 100012, China; (3) Tianjin Center, China Geological Survey, Tianjin; 300170, China Corresponding author:Wei, Xiao-Feng(yanchixiaowei@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1166-1176 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A total of 86 soil samples, 86 corn kernel samples, 50 tailings samples, and 33 ore rock samples were collected in reclaimed land and surrounding areas of typical vanadium-titanium magnetite tailings located in the Chengde Central Region and analyzed for 14 elements (P, Fe, Cu, Ni, Cd, Cr, Pb, Zn, Hg, Ti, Mn, and Mo) and speciation of heavy metals. This study investigated the bioaccumulation and translocation characteristics of heavy metals in a soil-maize system based on a descriptive statistical analysis, a geological accumulative index, bioconcentration factors, and a redundancy analysis. The results showed that the average accumulation index of surface soil followed an order of P>Cu>Fe2O3>Cr>Ti>V>Ni>Mn>Cd>Zn>Mo>As>Pb>Hg, while the accumulation level of heavy metals was generally categorized as either no accumulation or moderate accumulation. Compared to China's soil environmental quality standard risk screening values (GB15618-2018), the over-standard rates of Cr and Cu were 2.32% and 1.16%, respectively. The content of Fe, Ti, As, Pb, and Mn in the corn kernels of the tailings and surrounding areas was relatively high, and the content of Mo, Ni, Cu, Zn, Cd, and Cr in the control area was relatively high. The over-standard rates of Ni, Zn, and Cu in the corn kernels were 13.61%, 13.23%, and 5.17% respectively, according to China's national food safety standard limits for contaminants in food (GB 2762-2017). The bioconcentration factors of Fe, Ti, As, Pb, and Mn in the corn kernels of the tailings and the surrounding areas were relatively higher, while the bioconcentration factors of Mo, Ni, Cu, Zn, Cd, and Cr were lower than in control area. The bioactive components of Cd accounted for 50.17%, which was the highest, followed by Ni, Zn, and Cu with average ratios of 13.61%, 13.23%, and 5.17%, respectively. Compared to the control area, the Pb, As and Hg elements in the soil samples of the reclaimed land showed a lower total amount but a higher bioavailability content and soil pH value, while the Cu and Hg elements showed a higher total amount but lower bioavailability content and soil pH value. These differences in total heavy metal concentrations, bioavailability amounts, and soil pH values made the bioconcentration intensity of As and Pb in the tailings reservoir and surrounding area relatively higher. When studying the ecological risk of heavy metal pollution or determining the remediation target value of reclaimed land in a mine tailings reservoir and the soil around the mine area, the bioavailable state limit of heavy metals should be should be taken into account as the evaluation standard.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Soil pollution Controlled terms:Bioaccumulation - Biochemistry - Food safety - Heavy metals - Hematite - Land reclamation - Magnetite - Petroleum reservoir evaluation - pH - Reclamation - Soil surveys - Soils - Tailings Uncontrolled terms:Bio-concentration factors - Bioactive components - Environmental quality standards - Heavy metal concentration - Heavy metal pollution - Redundancy analysis - Tailings reservoirs - Vanadium-titanium magnetites Classification code:442.2 Land Reclamation - 452.3 Industrial Wastes - 461.6 Medicine and Pharmacology - 461.9 Biology - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 512.1.2 Petroleum Deposits : Development Operations - 531 Metallurgy and Metallography - 801.1 Chemistry, General - 801.2 Biochemistry Numerical data indexing:Percentage 1.16e+00%, Percentage 1.32e+01%, Percentage 1.36e+01%, Percentage 2.32e+00%, Percentage 5.02e+01%, Percentage 5.17e+00% DOI:10.13227/j.hjkx.202007200 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804528 Title:Air Pollution Characteristics and Quantitative Evaluation of Multi-scale Transport in the Beijing-Tianjin-Hebei Region in January, 2016 Title of translation:2016年1月京津冀地区大气污染特征与多尺度传输量化评估 Authors:Yao, Sen (1); Zhang, Han-Yu (2); Wang, Xiao-Qi (2); Yang, Shu-Shen (1) Author affiliation:(1) School of Energy and Environment, Zhongyuan University of Technology, Zhengzhou; 450007, China; (2) Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:534-545 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on atmospheric monitoring data and the WRF-CAMx model, this study analyzed the characteristics of air pollution and performed a quantitative assessment of PM2.5 cross-border transport in the Beijing-Tianjin-Hebei (BTH) region in January 2016. The results showed that the average concentrations of PM2.5, PM10, SO2, NO2, and CO were 89.5 μg•m-3, 135.61μg•m-3, 57.55μg•m-3, 60.79μg•m-3, and 2.12 mg•m-3, respectively, indicating severe PM2.5 pollution. During the study period, surface-level PM2.5 in each city of BTH region was dominated by local emissions, which accounted for 45.4% to 69.9%. The regional transport contribution was supplemented by transport from within and outside of the BTH region, accounting for 4.8% to 49.7% and 4.9% to 29.6%, respectively. In addition, high wind speeds promoted the diffusion of local PM2.5 pollution and cities with high upwind pollution enhance regional-scale transport to downwind cities. The total inflow, outflow, and net flux of PM2.5 in Beijing (Shijiazhuang) in January 2016 were 1 582.96 t•d-1 (2 036.89 t•d-1), -1 171.09 t•d-1 (-1 879.12 t•d-1), and 411.87 t•d-1 (157.77 t•d-1), respectively, indicating that PM2.5 inputs from surrounding cities per unit time were higher than external inputs to the surrounding cities. Furthermore, net PM2.5 flux showed notable vertical evolution; the total net flux of PM2.5 in Beijing and Shijiazhuang below 1 782 m ranged from 17.86 to 64.18 t•d-1 and -2.95 to 134.81 t•d-1, respectively, and both peaked 817 m above the ground at 64.18 and 134.81 t•d-1. Moreover, a significant increase the net PM2.5 inflow flux in Zhangjiakou and Shanxi explained the observed net flux peaks in these two cities.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Atmospheric movements Controlled terms:Air pollution - Sulfur dioxide Uncontrolled terms:Atmospheric monitoring - Average concentration - Beijing-tianjin-hebei regions - High wind speed - Pm2.5 pollutions - Quantitative assessments - Quantitative evaluation - Regional transport Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 804.2 Inorganic Compounds Numerical data indexing:Mass_Flow_Rate -3.10e-02kg/s to 1.42e+00kg/s, Mass_Flow_Rate 1.42e+00kg/s, Mass_Flow_Rate 1.66e+00kg/s, Mass_Flow_Rate 1.88e-01kg/s to 6.74e-01kg/s, Mass_Flow_Rate 3.87e-01kg/s, Mass_Flow_Rate 6.74e-01kg/s, Mass_Flow_Rate 9.23e+00kg/s, Percentage 4.54e+01% to 6.99e+01%, Percentage 4.80e+00% to 4.97e+01%, Percentage 4.90e+00% to 2.96e+01%, Size 1.78e+03m, Size 8.17e+02m DOI:10.13227/j.hjkx.202006042 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779610 Title:Combined Effects of Soil Amendment and Zinc Fertilizer on Accumulation and Transportation of Cadmium in Soil-Rice System Title of translation:组配改良剂联合锌肥对土壤-水稻系统镉迁移转运的影响 Authors:Zhou, Kun-Hua (1); Zhou, Hang (1, 2); Wang, Zi-Yu (1); Liu, Ya (1); Liu, Jia-Wei (1); Gu, Jiao-Feng (1, 2); Zeng, Peng (1, 2); Liao, Bo-Han (1, 2) Author affiliation:(1) College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China; (2) Hunan Engineering Laboratory for Control of Rice Quality and Safety, Changsha; 410004, China Corresponding authors:Zhou, Hang(zhouhang4607@163.com); Gu, Jiao-Feng(gujiaofeng@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4452-4461 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A field experiment was conducted in moderately and severely Cd contaminated paddy fields in Beishan Town, Changsha City, Hunan Province. This study examined the effects of LS amendment (limestone+sepiolite), in combination with soil application and foliar spraying of Zn fertilizer, on Cd uptake in early and late rice plants. The results showed that: ① the application of LS (2 250 kg•hm-2 and 4 500 kg•hm-2) significantly increased pH and CEC values in paddy soil during the early and late rice seasons, but the addition of Zn fertilizer (90 kg/hm2) to soil and through foliar spraying (0.2 g•L-1 and 0.4 g•L-1) had no significant effects on the pH or CEC of the soil. ② LS application decreased concentrations of TCLP-Cd and CaCl2-Cd in the soils, by 11.5%-38.8% and 24.0%-81.0%, respectively, while neither of the treatments involving the addition of Zn fertilizer to soil or through foliar spraying had any significant effects on the concentrations of TCLP-Cd and CaCl2-Cd. ③Single treatments involving only LS amendment, Zn fertilizer in soil, or foliar spraying of Zn fertilizer also reduced Cd concentrations in brown rice, but to a lesser degree than the combined treatments. The combined treatments (L1Z1F1, L1Z1F2, L2Z1F1, and L2Z1F2) reduced Cd concentrations in brown rice by 64.9%-67.5% and 56.1%-80.6%, for early and late rice, respectively, while L2Z1F1 (4 500 kg•hm-2 LS+90 kg•hm-2 Zn fertilizer+foliar spraying 0.2 g•L-1 Zn fertilizer) resulted in the largest reduction in Cd concentration in brown rice. ④ The Cd/Zn ratio in brown rice was significantly positively correlated with Cd concentrations, indicating that increased Zn concentration in different rice tissues was one of the key reasons for decreased Cd concentration in brown rice. Clearly, as a remediation technology, combining LS amendments with zinc fertilizer is an effective method for achieving the safe utilization of moderately and severely Cd contaminated paddy fields, by effectively inhibiting the uptake, accumulation, and transportation of Cd in rice plants and decreasing Cd concentrations in brown rice.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Soil pollution Controlled terms:Cadmium - Fertilizers - Lime - Remediation - Soils - Zinc Uncontrolled terms:Cd concentrations - Changsha cities - Combined effect - Combined treatment - Field experiment - Hunan province - Remediation technologies - Soil applications Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 546.3 Zinc and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 2.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e-01kg/m3 to 2.20e-02kg/m3, Percentage 1.15e+01% to 3.88e+01%, Percentage 2.40e+01% to 8.10e+01%, Percentage 5.61e+01% to 8.06e+01%, Percentage 6.49e+01% to 6.75e+01% DOI:10.13227/j.hjkx.202101150 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804512 Title:Removal of Oxytetracycline from Water Using Blast Furnace Slag Loaded Sulfide Nanoscale Zero-valent Iron Title of translation:高炉水渣负载硫化纳米零价铁对水中土霉素的去除 Authors:Sun, Qiu-Nan (1); Zhang, Rong-Bin (2); Deng, Man-Jun (1); Li, Yuan (1); Wang, Xue-Jiang (1) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (2) Jiaxing United Sewage Treatment Co. Ltd., Jiaxing; 314001, China Corresponding author:Wang, Xue-Jiang(wangxj@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:867-873 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Blast furnace slag loaded with sulfide nano zero valent iron (S-nZVI@BFS) was applied to remove oxytetracycline (OTC) from water. S-nZVI@BFS was synthesized via liquid reduction and characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Brunauer, Emmett and Teller (BET) theory. The effect of reaction time, initial concentration of OTC, initial pH, and coexisting hexavalent chromium [Cr(Ⅵ)] were investigated. The results show that Fe and S were successfully immobilized on the surface of S-nZVI@BFS, the specific surface area and pore volume of which increased to 141.986 m2•g-1 and 0.388 cm3•g-1, respectively, following the loading of nZVI and sulfurization. The utilization rate of the surface active sites of S-nZVI@BFS was improved with an increase of the initial concentration of OTC; the removal rate increased from 20.12 mg•g-1 to 202.74 mg•g-1 when the initial concentration of OTC was increased from 10 mg•L-1 to 100 mg•L-1. The removal rate decreased with pH, declining from 99.78 mg•g-1 to 41.12 mg•g-1 when pH was increased from 3 to 11 due to the switch from Fendon oxidation to electrostatic adsorption. There was notable competition between OTC and Cr(Ⅵ) meaning that Cr(Ⅵ) can inhibit the removal of OTC, which is dose dependent.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Chemicals removal (water treatment) Controlled terms:Blast furnaces - Iron - Scanning electron microscopy - Slags - Sulfur compounds Uncontrolled terms:Electrostatic adsorption - Hexavalent chromium - Initial concentration - Nano zero-valent irons - Nano-scale zero valent irons - Oxytetracyclines (OTC) - Surface active sites - Utilization rates Classification code:532.2 Blast Furnaces - 545.1 Iron - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 1.00e-01kg/m3, Specific_Surface_Area 1.42e+05m2/kg, Specific_Volume 3.88e-04m3/kg DOI:10.13227/j.hjkx.202007155 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779803 Title:Spatiotemporal Distribution and Health Impacts of PM2.5 and O3 in Beijing, from 2014 to 2020 Title of translation:北京市2014~2020年PM2.5和O3时空分布与健康效应评估 Authors:Chen, Jing (1); Peng, Jin-Long (2); Xu, Yan-Sen (1) Author affiliation:(1) School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Xu, Yan-Sen(shuibao_xys@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4071-4082 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In China, fine particulate matter (PM2.5) and tropospheric ozone (O3) have become major air pollutants that threaten human health. Since 2013, the government has strengthened air pollution controls in Beijing and achieved significant effects. A spatial-temporal analysis was conducted of the distribution and health impacts of PM2.5 and O3 in Beijing, using data collected from 34 air quality monitoring sites between 2014 and 2020. In 2014, the annual average PM2.5 and seasonal (April to September) average of daily one-hourly maximum O3 concentrations (O3_max) were 92.0 μg•m-3 and 81.9 nmol•mol-1, respectively. From 2014 to 2020, annual average PM2.5 decreased at a rate of 7.5 μg•m-3. However, there was no significant difference in O3_max over the years. The concentrations of PM2.5 were highest in December and January (in winter) and lowest in August (in summer). On the contrary, O3_max was highest in June. The diurnal variations of PM2.5 were affected by meteorological conditions and emission sources, and maximum concentrations occurred between 22: 00 to 00: 00, while minimum concentrations occurred between 14: 00 to 16: 00. The concentration of O3_max showed an opposite pattern, with minimum vales occurring at 07: 00 and maximum values occurring in the afternoon. The spatial distribution of PM2.5 showed similar patterns in 2014 and 2019, with the south of Beijing exhibiting the highest concentrations, and the north the lowest. The concentration of O3_max was higher in suburban areas than in traffic areas. In terms of health impacts, 1 580 cases of cardiovascular disease and 821 of respiratory disease were attributed to PM2.5 in 2014, while 2 180 cases of respiratory disease were attributable to O3 in 2014. In 2019, mortalities attributable to PM2.5 had decreased by 50% compared to 2014. While the number of disease cases attributable to O3 were similar in 2014 and 2019. the results indicate that PM2.5 pollution in Beijing has been successfully controlled, while O3 pollution has become more severe, and was the primary air pollutant threatening human health in 2019. Therefore, the synchronous control of PM2.5 and O3 should be implemented in the future.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Quality control Controlled terms:Air quality - Pollution control - Pulmonary diseases - Spatial distribution Uncontrolled terms:Air quality monitoring - Cardio-vascular disease - Fine particulate matter (PM2.5) - Maximum concentrations - Meteorological condition - Spatial temporal analysis - Spatiotemporal distributions - Synchronous control Classification code:451.2 Air Pollution Control - 461.6 Medicine and Pharmacology - 913.3 Quality Assurance and Control - 921 Mathematics Numerical data indexing:Percentage 5.00e+01% DOI:10.13227/j.hjkx.202101033 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582365 Title:Characteristics of Dissolved Organic Matter in Overlying Water During Algal Bloom Decay Title of translation:蓝藻衰亡过程中上覆水溶解性有机物变化特征 Authors:Li, Xiang (1, 2); Li, Zhi-Chun (1, 2, 3); Wang, Xuan (1, 2); Zhang, Si-Yuan (1, 2); Wang, Hui-Min (1); Li, Rong-Qiang (1); Wang, Guo-Xiang (1, 2); Li, Qi-Meng (1, 2) Author affiliation:(1) School of Environment, Nanjing Normal University, Nanjing; 210023, China; (2) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Jiangsu Engineering Laboratory of Water and Soil Eco-remediation, Nanjing; 210023, China; (3) School of Environment and Surveying Engineering, Suzhou University, Suzhou; 234000, China Corresponding author:Wang, Guo-Xiang(guoxiangwang@yeah.net) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3281-3290 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, indoor simulation experiments were performed to elucidate the effects of migration and transformation of dissolving organic matter (DOM) during the decay of algal blooms. Based on ultraviolet-visible spectra (UV-vis) and excitation-emission matrix spectroscopy (EEMs), spectral characterizations of dissolved organic matter (DOM) in overlying water were evaluated with analyses of the physical and chemical indexes, variation in dissolved organic carbon (DOC), and variation in dissolved inorganic carbon (DIC). Results showed that at the early stage of decay, a large amount of organic matter was released, and dissolved oxygen (DO) decreased sharply. With the extension of reaction time, DOC gradually changed into DIC, which further changed the oxidation-reduction and acid-base characteristics of the water. UV-vis spectra showed that a large amount of DOM was released with high aromaticity and a high degree of humification, and the released DOM was gradually degraded. With the application of parallel factor analysis in excitation-emission matrix spectroscopy (EEM-PARAFAC), three fluorescence components were analyzed: refractory humic-like substances (C1), protein-like tryptophan substances (C2) produced by algae, and fulvic-like substances (C3) related to microbial activities. Most protein-like tryptophan substances were degraded into fulvic-like substances by microorganisms during the decaying process. Heterotrophic microorganisms promoted the release of algae-derived DOM and accelerated the degradation of DOM. The DOM born during algae blooms decaying process was eventually converted into humic-like substance, which was difficult to be degraded. We analyzed correlations of water quality, UV-vis spectrum, and EEMs parameters. Results showed that ORP was positively correlated (P<0.05) with DO. There was a significant negative correlation (P<0.05) between pH and DOC, which was consistent with the trend of the transformation to from DOC to DIC; C1 was positively correlated (P<0.05) with Fn355; and C2 was significantly positively correlated (P<0.05) with DOC and Fn280; C3 was positively correlated (P<0.05) with FI, BIX and β:α. The variation trend of these spectral parameters was consistent with that of DOM components. In summary, with the analyses of water quality characteristics and spectral characteristics of DOM in overlying water during algae blooms decaying process, it was expected that our results could contribute to the further exploration of the dynamic migration and transformation of lake DOM and the changes of carbon cycling.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Organic carbon Controlled terms:Algae - Amino acids - Biochemical oxygen demand - Biodegradation - Biogeochemistry - Dissolution - Dissolved oxygen - Microorganisms - Photodegradation - Proteins - Spectrum analyzers - Water quality Uncontrolled terms:Acid-base characteristics - Dissolved inorganic carbon - Dissolved organic carbon - Dissolved organic matters - Excitation emission matrices - Spectral characterization - Ultraviolet-visible spectra - Water quality characteristics Classification code:445.2 Water Analysis - 461.8 Biotechnology - 461.9 Biology - 481.2 Geochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202011241 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582287 Title:Pollution Distribution and Ecological Risk Assessment of Heavy Metals in River Sediments from the Ancient Town of Suzhou Title of translation:苏州古城区域河道底泥的重金属污染分布及生态风险评价 Authors:Bai, Dong-Rui (1); Zhang, Tao (1); Bao, Jun-Song (1); Chen, Tan (1); Wang, Hong-Tao (2); Jin, Xi (2); Jin, Jun (1); Yang, Ting (1) Author affiliation:(1) College of Life and Environmental Sciences, Minzu University of China, Beijing; 100081, China; (2) School of Environment, Tsinghua University, Beijing; 100084, China Corresponding authors:Chen, Tan(chentan05@tsinghua.org.cn); Wang, Hong-Tao(htwang@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3206-3214 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The contents of heavy metals (Cd, Cu, Cr, As, Mn, Ni, Pb, and Zn) in sediments from 20 representative sections of the ancient town of Suzhou were analyzed to determine the pollution degree and potential ecological risk, and pollution sources were identified. The results showed that the average concentrations of Cd, Cu, Cr, As, Mn, Ni, Pb, and Zn in river sediments from the ancient town of Suzhou were 1.1, 142.6, 90.2, 17.2, 800.1, 63.3, 199.1, and 384.2 mg•kg-1, respectively, and the proportions of sampling points that exceeded the soil background value of Jiangsu Province were 100%, 100%, 65%, 95%, 70%, 100%, 95%, and 100%, respectively. The geo-accumulation index indicated that the pollution degree of heavy metals followed the order of Pb>Cd>Cu>Zn>Cr>Ni>As>Mn. In general, high Pb pollution, moderate Cd, Cu, Zn, and Cr pollution, slight Ni and As pollution, and no Mn pollution were observed. The potential ecological risk index for heavy metals was determined to follow the order of Cd>Pb>Cu>As>Ni>Zn>Cr>Mn. Generally, Cd, Pb, and Cu presented moderate potential ecological risk, and the others presented low potential ecological risk. The average concentration of heavy metals, geo-accumulation index, and potential ecological risk index of river sediments in the northern and southern of ancient town were all higher than that of Ganjiang River and Huancheng River, indicating that the control of heavy metals should focus on the inner part of the ancient town. According to correlation analysis and principal component analysis, Cd, Cu, Cr, As, Ni, Pb, and Zn might be derived from man-made factors such as fertilizer, road aging, tire wear, exhaust emissions and so on, which Mn was mainly derived from natural factors.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:River pollution Controlled terms:Heavy metals - Risk assessment - Rivers - Sediments Uncontrolled terms:Average concentration - Background value - Correlation analysis - Ecological risk assessment - Geo-accumulation index - Jiangsu province - Pollution sources - Potential ecological risk Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.00e+02%, Percentage 6.50e+01%, Percentage 7.00e+01%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202011048 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688811 Title:Occurrence Characteristics and Health Risk Assessment of Endocrine Disrupting Chemicals in Groundwater in Wuxi-Changzhou Title of translation:无锡-常州地下水中内分泌干扰物的赋存特征和健康风险评价 Authors:Wang, Shu-Ting (1); Rao, Zhu (1); Guo, Feng (1); Liu, Cheng-Hai (1); Zhan, Nan (1); Wang, Ya-Nan (1, 2); Peng, Jie (1, 2); Yang, Hong-Bo (2) Author affiliation:(1) Key Laboratory of Eco-geochemistry(Ministry of Natural Resources), National Research Center for Geoanalysis, Chinese Academy of Geological Sciences, Beijing; 100037, China; (2) School of Public Health, Guizhou Medical University, Guiyang; 550025, China Corresponding author:Guo, Feng(fengguo@cags.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:166-174 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The concentrations of 22 endocrine disrupting chemicals, including 4 categories of sex hormones, progesterones, glucocorticoids, and phenolic hormones, in groundwater of Wuxi-Changzhou were analyzed using solid-phase extraction and ultra-performance liquid chromatography tandem mass spectrometry. The results indicated that 20 EDCs were detected, among which bisphenol A (BPA), estrone (E1), estradiol (E2), and 17α-ethinyl estradiol (EE2) were the main components with detection ratios greater than 90%, followed by estriol (E3) and methyl-prednisolonel (Meprednl), which had detection rates 67.7% and 48.4%, respectively. The average concentration of BPA was the highest (4.95 ng•L-1), followed by that of Meprednl, E2, prednisolone (Prednl), testosterone propionate (TES-pro), and megestrol-acetate (MA; 2.84, 0.71, 0.64, 0.58, and 0.53 ng•L-1, respectively). The total concentration in each site ranged from 0.38 to 147.35 ng•L-1. The sites with higher concentration were mainly distributed in the Xinbei District, Liyang City, and the Zhonglou District of Changzhou City. The potential sources were analyzed by a principal component analysis (PCA) combining the point sources near sample sites. The results showed that domestic sewage, aquaculture, and industrial wastewater were the main sources, following by medical wastewater. A non-carcinogenic risk assessment showed a low risk of EDCs in the groundwater of the study area, and the risk of drinking water was greater than that of skin exposure. EE2 had the highest non-carcinogenic risk and is suggested to be monitored in priority.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Risk assessment Controlled terms:Chemicals - Drug products - Endocrine disrupters - Endocrinology - Groundwater - Health risks - Hormones - Liquid chromatography - Mass spectrometry - Phase separation - Potable water - Sewage - Volatile fatty acids Uncontrolled terms:Average concentration - Carcinogenic risk - Carcinogenic risk assessments - Endocrine disrupting chemicals - Industrial wastewaters - Potential sources - Solid-phase extraction - Ultra performance liquid chromatography Classification code:444 Water Resources - 444.2 Groundwater - 452.1 Sewage - 461 Bioengineering and Biology - 641.1 Thermodynamics - 801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 3.80e-10kg/m3 to 1.47e-07kg/m3, Mass_Density 4.95e-09kg/m3 to 2.20e-02kg/m3, Mass_Density 5.30e-10kg/m3 to 2.20e-02kg/m3, Percentage 4.84e+01%, Percentage 6.77e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202005104 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003404 Title:Organ-Specific Accumulation and Toxicokinetics of Ephedrine in Adult Zebrafish (Danio rerio) Title of translation:麻黄碱在斑马鱼体内的器官特异性蓄积及毒代动力学 Authors:Yin, Xing-Xing (1, 2, 3); Guo, Chang-Sheng (1, 3); Deng, Yang-Hui (1, 3); Qiu, Zi-Wen (1, 3); Zhang, Yan (1, 3); Teng, Yan-Guo (2); Xu, Jian (1, 2, 3) Author affiliation:(1) Center for Environmental Health Risk Assessment and Research, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (3) State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Xu, Jian(xujian@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1496-1502 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ephedrine (EPH) is an alkaloid commonly used to relieve nasal congestion caused by colds, allergic rhinitis, rhinitis, and sinusitis, and to control bronchial asthma. It is also be used as a raw material in the manufacture of methamphetamine. Although the distribution of EPH in surface waters has been widely studied, its uptake, internal distribution, and toxicokinetic processing in exposed organisms have not been well investigated. In this study, we investigated the uptake, disposition, and toxicokinetics of EPH in zebrafish (Danio rerio) in a semi-static exposure system. EPH was consistently detected in zebrafish biological samples, with the highest concentrations of 84.97 ng•g-1 detected in the brain tissue of fish in the high treatment group. Over the 14-d exposure period, the relative abundance of mean concentrations of EPH in biological samples generally followed the order of brain>ovary>liver>intestine>muscle. The uptake rate constants (Ku), elimination rate constants (Ke), and half-lives of EPH in the biological tissues were in the ranges 0.23-570.31 L•(kg•d)-1, 1.22-6.11 d-1, and 0.12-0.57 d, respectively. The observed bioconcentration factor (BCFo) and kinetically-derived bioconcentration factor (BCFk) were similar, ranging 0.24-337.33 L•kg-1 and 0.13-316.43 L•kg-1, respectively. These results are helpful for understanding the behavior of psychoactive substances in aquatic organisms and have directive significance for studying their toxicity and ecological risks to aquatic organisms.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Aquatic organisms Controlled terms:Bioaccumulation - Diseases - Drug products - Rate constants - Tissue Uncontrolled terms:Allergic rhinitis - Bio-concentration factors - Biological samples - Biological tissues - Directive significance - Mean concentrations - Relative abundance - Uptake rate constants Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 471 Marine Science and Oceanography - 802.2 Chemical Reactions Numerical data indexing:Specific_Volume 1.30e-04m3/kg to 3.16e-01m3/kg, Specific_Volume 2.40e-04m3/kg to 3.37e-01m3/kg DOI:10.13227/j.hjkx.202007235 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651025 Title:Effects of Farming Practices on Soil Nitrogen and Phosphorus Concentrations and Its Loss in the Drawdown Area of the Tributary Embayment of the Three Gorges Reservoir Title of translation:农业耕作对三峡水库支流库湾消落带土壤氮,磷含量及流失的影响 Authors:Luo, Fang (1, 2, 3); Lu, Lun-Hui (2, 3); Li, Zhe (2, 3); Wei, Fang-Qiang (2, 3) Author affiliation:(1) Chongqing Jiaotong University, Chongqing; 400074, China; (2) Chongqing School, University of Chinese Academy of Sciences, Chongqing; 400714, China; (3) Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China Corresponding author:Lu, Lun-Hui(lulunhui@cigit.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3763-3772 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As the Three Gorges Reservoir (TGR) periodically operates at low water levels, its drawdown area has been utilized for cultivation by local farmers due to the overlap of the non-inundated period and the crop-growth period. However, traditional agricultural planting may affect the aquatic environment of the TGR area. To explain the effects of agricultural farming and abandoned farming on the water environment, a study was conducted in the drawdown area in an embayment of the Pengxi River (a tributary of the TGR). Corn, potato, and peanut fields were investigated for nitrogen and phosphorus content in surface soil, during the farming period (March to September 2018) and the conversion period (March to September 2019). Nitrogen and phosphorus balance models were constructed for farmland and abandoned farmland, to compare and analyze the budgets and loss risk of nitrogen and phosphorus from soil in the drawdown area. The results showed that the ammonia nitrogen (NH4+-N), total phosphorus (TP), and inorganic phosphorus (IP) content of soil in the corn field varied significantly across different planting periods. The concentrations of ammonium nitrogen and nitrate nitrogen (NO3--N) were significantly higher in farmland soil than in abandoned farmland soil, and the concentrations of total phosphorus (TP), inorganic phosphorus (IP), and calcium-bound phosphorus (Ca-P) were significantly lower in farmland soil than in abandoned farmland soil. The different soils were ranked according to the intensity of nitrogen and phosphorus surplus as follows: corn field>potato field>peanut field. The apparent surplus values in the different farmland soils were 76.89 kg•hm-2(corn field), 51.92 kg•hm-2(potato field), and 43.74 kg•hm-2(peanut field) for nitrogen, and 79.69 kg•hm-2(corn field), 75.76 kg•hm-2(potato field), and 17.78 kg•hm-2(peanut field) for phosphorous. Overall, the surplus intensities of nitrogen and phosphorus in all three croplands were higher than the respective risk thresholds, indicating potential nitrogen and phosphorus pollution in the three farmland types. Agricultural farming in the drawdown area may therefore increase the risk of nitrogen and phosphorus loss and is not conducive to the protection of the aquatic environment.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Farms Controlled terms:Agricultural robots - Agricultural runoff - Ammonia - Budget control - Calcium compounds - Cultivation - Oilseeds - Phosphorus - Reservoirs (water) - River pollution - Soils - Water levels Uncontrolled terms:Abandoned farmland - Aquatic environments - Compare and analyze - Inorganic phosphorus - Nitrogen and phosphorus - Nitrogen and phosphorus loss - Three gorges reservoir - Water environments Classification code:441.2 Reservoirs - 453 Water Pollution - 453.1 Water Pollution Sources - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202012092 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651018 Title:Investigation of Soil Fungal Communities and Functionalities within Karst Paddy Fields Title of translation:岩溶区稻田土壤真菌群落结构及功能类群特征 Authors:Zhou, Jun-Bo (1); Jin, Zhen-Jiang (1, 2, 3); Xiao, Xiao-Yi (1); Leng, Meng (1); Wang, Xiao-Tong (1); Pan, Fu-Jing (1, 2, 3) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin; 541004, China; (3) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin; 541004, China Corresponding author:Jin, Zhen-Jiang(zhenjiangjinjin@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:4005-4014 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Fungi are important drivers of soil biogeochemical cycles. However, the characteristics of fungal community structures and functional groups within karst area (KA) soils remain understudied. Top soil samples were collected from paddy fields within a KA and non-karst area (NKA) containing red soil, in the Maocun karst experimental site of Guilin. The fungal community structure was analyzed via high-throughput sequencing, and FUNGuild was used to predict the function of fungi. The average relative abundance of Mucormycota in KA was 4.87%, which was significantly lower than that in NKA (29.92%); The average relative abundance of Mortierellomycetes in KA was 3.36%, which was significantly lower than that in NKA (29.15%). However, in KA, the average relative abundances of Glomeromycetes, Chytridiomycetes, and Exobasidiomycetes were 0.91%, 0.98%, and 0.23%, respectively, significantly higher than those in NKA (0.47%, 0.28%, and 0.04%). In KA, the average relative abundances of Ramophialophora and Emericellopsis were 2.39% and 1.25%, respectively, significantly higher than those in NKA (0.05% and 0.09%). However, the average relative abundance of Mortierella was 3.04% in KA, which was lower than that in NKA (28.34%). KA contained 32 dominant OTUs, including OTU141, 99, and 192. There was more connectivity between OTU69 (Emericellopsis terricola) and OTU138 (Westerdykella globosa) with the cation exchange capacity (CEC), exchangeable Ca2+, and total phosphorus (TP) in the correlation network. In KA, the average abundances of symbiotroph and pathotroph-saprotroph fungi were 1.29% and 1.50%, respectively, significantly higher than those in NKA (0.08% and 0.09%). The average abundance of the saprotroph-symbiotroph fungi in KA was 10.81%, which was significantly lower than that in NKA (63.69%). In KA, dung saprotroph-wood saprotroph fungi were dominant, with an abundance of 9.73%, whereas in NKA, endophyte-litter saprotroph-soil saprotroph-undefined saprotroph fungi were dominant, with an abundance of 45.93%. The above results suggest that the soil factors of KA, such as CEC, exchangeable Ca2+, and TP, alter the structures and functions of fungi.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Fungi Controlled terms:Biogeochemistry - Landforms - Soils Uncontrolled terms:Biogeochemical cycle - Cation exchange capacities - Correlation network - Fungal community - High-throughput sequencing - Relative abundance - Soil fungal communities - Total phosphorus Classification code:481.1 Geology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics Numerical data indexing:Percentage 1.08e+01%, Percentage 1.25e+00%, Percentage 1.29e+00%, Percentage 1.50e+00%, Percentage 2.30e-01%, Percentage 2.39e+00%, Percentage 2.80e-01%, Percentage 2.83e+01%, Percentage 2.91e+01%, Percentage 2.99e+01%, Percentage 3.04e+00%, Percentage 3.36e+00%, Percentage 4.00e-02%, Percentage 4.59e+01%, Percentage 4.70e-01%, Percentage 4.87e+00%, Percentage 5.00e-02%, Percentage 6.37e+01%, Percentage 8.00e-02%, Percentage 9.00e-02%, Percentage 9.10e-01%, Percentage 9.73e+00%, Percentage 9.80e-01% DOI:10.13227/j.hjkx.202011164 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582372 Title:Role of Land Use Changes on Ammonia Emissions from Agricultural Ecosystems in the Yangtze River Delta Region from 2000 to 2018 Title of translation:2000~2018年长三角土地利用变化对农田生态系统氨排放的影响 Authors:Wang, Wen-Jin (1); Wang, Qing (2); Zhu, An-Sheng (1); Huang, Ling (1); Gu, Ying (3); Wang, Yang-Jun (1); Wang, Min (2); Li, Li (1) Author affiliation:(1) School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China; (2) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) School of Air Transportation, Shanghai University of Engineering Science, Shanghai; 201620, China Corresponding author:Li, Li(Lily@shu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3442-3450 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on Landsat satellite remote sensing images, this study interprets land use changes in the Yangtze River Delta (YRD) region from 2000 to 2018. Combined with changes in nitrogen fertilizer application, the changes in ammonia emissions from farmland ecosystem due changes in land use and nitrogen fertilizer application were further investigated. The results show that along with the rapid urbanization process, the area of cultivated land in the YRD region has gradually decreased from 276 269 km2 (49% of total land area) in 2000 to 244 001 km2 (44%) in 2018. The effects of changes in land use and nitrogen fertilizer application on ammonia emissions from farmland ecosystems mainly include emissions from soil background and nitrogen fertilizer application. From 2000 to 2018, ammonia emissions due to the application of nitrogen fertilizer decreased from 690 kt•a-1 to 541 kt•a-1 (relative decrease by 22%), while the ammonia emissions from the soil background reduced from 32 kt•a-1 to 29 kt•a-1 (decrease by 9%). During the past 20 years, urbanization in the YRD region has accelerated, and the area of cultivated land and the total amount of nitrogen fertilizer application have significantly reduced, thus resulting in reductions in ammonia emissions from the farmland ecosystem.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Nitrogen fertilizers Controlled terms:Air pollution control - Ammonia - Ecosystems - Farms - Land use - Remote sensing Uncontrolled terms:Agricultural ecosystems - Ammonia emissions - Cultivated lands - Farmland ecosystem - Fertilizer applications - Landsat satellite - Rapid urbanization process - Yangtze river delta Classification code:403 Urban and Regional Planning and Development - 451.2 Air Pollution Control - 454.3 Ecology and Ecosystems - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Age 2.00e+01yr, Percentage 2.20e+01%, Percentage 4.40e+01%, Percentage 4.90e+01%, Percentage 9.00e+00% DOI:10.13227/j.hjkx.202010202 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582314 Title:Analysis of Water Quality and Exchange Flux of Interstitial Water-Overlying Water in Sediments of Baiyangdian Entrance Area in Summer Title of translation:白洋淀夏季入淀区沉积物间隙水-上覆水水质特征及交换通量分析 Authors:Zhang, Tian-Na (1); Zhou, Shi-Lei (1); Chen, Zhao-Ying (1); Zhang, Zi-Wei (1); Sun, Yue (1); Yao, Bo (1); Cui, Jian-Sheng (1); Li, Zai-Xing (1); Luo, Xiao (1) Author affiliation:(1) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China Corresponding author:Zhou, Shi-Lei(ZSLZhouShilei@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3176-3185 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to reveal the interaction of overlying water-interstitial water nitrogen and phosphorus nutrient salt in summer at the entrance region of Baiyangdian Lake, this study sampled six main rivers in the region during July 2019. An analysis of the overlying water and interstitial water quality characteristics and the diffusion flux of applied nutrients at the sediment-water interface revealed the effects of nutrient diffusion on sediments and overlying water. The overlying water analysis showed that the water quality was slightly alkaline in the Baiyangdian Lake. The content of dissolved oxygen (DO) was lower, which provided an anaerobic environment for the release of endogenous pollutants from sediments. The ammonia nitrogen (NH4+-N) ranged from 0.35 to 1.76 mg•L-1, and the content of ammonia nitrogen was the highest in the Zhulong River, which was the main source of water supply. The nitrate nitrogen (NO3--N) content ranged from 0.75 to 1.97 mg•L-1. The total dissolved nitrogen (TDN) ranged from 0.99 to 2.70 mg•L-1, and the content of TDN was the highest in Puhe River. The content of total dissolved phosphorus (TDP) was 0.03 to 0.15 mg•L-1, and the content of TDP was the highest was Baigouyin River, which is near the residential area. The results indicated that the content of ammonia nitrogen in the interstitial water was between 5.24 and 10.64 mg•L-1, which was 10 times that of the overlying water, and endogenous pollution in the former was severe. The nitrate nitrogen content ranged from 0.36 to 0.79 mg•L-1. The total dissolved nitrogen content was between 5.36 and 12.02 mg•L-1, which was 5 times higher than that of the overlying water. The total dissolved phosphorus was between 0.03 and 0.3 mg•L-1. According to integrated pollution index, the degree of interstitial water pollution was much higher than that of overlying water, and the sampling points are seriously polluted. The exchange flux analysis of NH4+-N, TDN, and TDP demonstrated that the diffusion flux of NH4+-N was between 1.71 and 7.43 mg•(m2•d)-1, and the diffusion rate of endogenous ammonia nitrogen to the overlying water was fastest in Fu River, the absorbing river in Baoding. The diffusion flux of total dissolved nitrogen was lower in the Baigouyin River, and the other five sample points averaged 9.11 mg•(m2•d)-1. In summer, the dissolved oxygen was lower and the water-sediment had a larger concentration difference, which led to massive nitrogen nutrient of sediment in anaerobic conditions released to the overlying water in great quantities that caused the serious pollution. The diffusion flux of dissolved total phosphorus showed that the sediment of Pinghe River acted as a "sink" of phosphorus nutrients, and the other sampling points ranged from 0.03 to 0.16 mg•(m2•d)-1, showing the state of phosphorus nutrient released upward to the overlying water. Finally, diffusion flux indicated that endogenous pollutants are crucial sources of overlying water pollutants. In order to effectively control the water quality in the entrance area, desilting the nitrogen and phosphorus nutrient salt of sediment is urgently required.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Biochemical oxygen demand Controlled terms:Ammonia - Anoxic sediments - Diffusion - Dissolution - Dissolved oxygen - Lake pollution - Lakes - Nitrates - Nitrogen - Nutrients - Phosphorus - Quality control - River pollution - Rivers - Water quality - Water supply Uncontrolled terms:Anaerobic conditions - Anaerobic environment - Dissolved nitrogen - Integrated pollution indices - Nitrogen and phosphorus - Nutrient diffusion - Sediment water interface - Total dissolved phosphorus Classification code:445.2 Water Analysis - 446.1 Water Supply Systems - 453 Water Pollution - 483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Mass_Density 3.00e-05kg/m3 to 1.50e-04kg/m3, Mass_Density 3.00e-05kg/m3 to 3.00e-04kg/m3, Mass_Density 3.50e-04kg/m3 to 1.76e-03kg/m3, Mass_Density 3.60e-04kg/m3 to 7.90e-04kg/m3, Mass_Density 5.24e-03kg/m3 to 1.06e-02kg/m3, Mass_Density 5.36e-03kg/m3 to 1.20e-02kg/m3, Mass_Density 7.50e-04kg/m3 to 1.97e-03kg/m3, Mass_Density 9.90e-04kg/m3 to 2.70e-03kg/m3 DOI:10.13227/j.hjkx.202011136 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688804 Title:Community Structure, Function, and Influencing Factors of Planktonic Fungi in the Danjiangkou Reservoir Title of translation:丹江口库区浮游真菌组成与功能及其影响因素 Authors:Zheng, Bao-Hai (1); X.-Y., Wang; Y.-J., Li; Y., Chen; B.-L., Li; Y.-Y., Li; Z.-J., Chen Author affiliation:(1) Collaborative Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Water Resource and Environmental Engineering, Nanyang Normal University, Nanyang; 473061, China; (2) International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province, Nanyang; 473061, China; (3) Department of Environmental Sciences, University of California, Riverside; CA; 92521, United States Corresponding authors:Li, Yu-Ying(lyying200508@163.com); Chen, Zhao-Jin(zhaojin_chen@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:234-241 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Planktonic fungi are important components of aquatic ecosystems, and analyses of their community composition and function have far-reaching significance for the ecological management and maintenance of the Danjiangkou reservoir. The composition and function of the planktonic fungal community in the surface water layer of the Danjiangkou Reservoir in October 2019 was investigated using Illumina MiSeq sequencing combined with FUNGuild analyses. According to the results, the reservoir community is primarily composed of 6 phyla 213 genera, with Ascomycota and Basidiomycota being the dominant phyla. The water quality monitoring results for the Danjiangkou Reservoir met the Grade Ⅰ or Ⅱ water quality standards for the Environmental Quality Standards for Surface Water (GB 38382-2002). A redundancy analysis (RDA) of the planktonic fungal community and environmental factors showed that TN, TP, T, ORP, and TLI are important factors influencing the distribution of planktonic fungi. The Spearman correlation analysis showed that Alternaria, Cladosporium, Penicillium, Lodderomyces, and Acremonium were significantly correlated with physical and chemical water quality parameters. FUNGuild was used to predict the nutritional and functional groups of planktonic fungi, and the results showed that pathotrophs, saprotrophs, and pathotroph-saprotrophs were the major components. The pathotroph composition analysis showed that the proportions of plant pathogens and animal pathogens in the Heijizui samples were significantly higher than those observed in the other monitoring sites. The community composition, function, and influencing factors of the planktonic fungi community in the Danjiangkou Reservoir were investigated and indicated that it is potentially at ecological risk and more attention needs to be paid to planktonic fungi in the biological monitoring of water quality.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Reservoirs (water) Controlled terms:Aquatic ecosystems - Aquatic organisms - Chemical analysis - Fungi - Quality control - Reservoir management - Surface waters - Water quality Uncontrolled terms:Biological monitoring - Danjiangkou reservoir - Ecological managements - Environmental factors - Environmental quality standards - Redundancy analysis (RDA) - Water quality monitoring - Water quality standard Classification code:441.2 Reservoirs - 444.1 Surface Water - 445.2 Water Analysis - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 512.1.2 Petroleum Deposits : Development Operations - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.202006192 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779602 Title:Extinction Characteristics of Aerosols and the Contribution of Pollution Sources to Light Extinction During Three Heavy Pollution Episodes in the Winter of 2020 in Tianjin Title of translation:天津市2020年冬季重污染过程气溶胶消光特性及其来源 Authors:Li, Li-Wei (1); Xiao, Zhi-Mei (1); Yang, Ning (1); Cai, Zi-Ying (2); Yan, Bin-Feng (3); Yuan, Jie (1); Bai, Yu (1); Zheng, Nai-Yuan (1); Tang, Miao (1) Author affiliation:(1) Tianjin Eco-Environmental Monitoring Center, Tianjin; 300191, China; (2) Tianjin Environmental Meteorological Center, Tianjin; 300074, China; (3) Tianjin Hedong Eco-Environmental Monitoring Center, Tianjin; 300170, China Corresponding author:Tang, Miao(tangmiao32@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4158-4167 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study examined high-resolution online monitoring data from January to February 2020 to study the extinction characteristics and sources of heavy pollution episodes during winter in Tianjin. Heavy pollution episodes occurred during this period from January 16 to 18 (episode Ⅰ), from January 24 to 26 (episode Ⅱ), and from February 9 to 10 (episode Ⅲ). The results showed that the concentrations of PM2.5 during the three heavy pollution episodes were (229±52), (219±48), and (161±25) μg•m-3, respectively, with NO3-, SO42-, NH4+, OC, EC, Cl-, and K+comprising the main species. The values of the scattering coefficient(Bsp550)during the three heavy pollution episodes were (1 055.65±250.17), (1 054.26±263.22), and (704.44±109.89) Mm-1, respectively, while the absorption coefficient(Bap550)showed much lower values of (52.96±13.15), (39.72±8.21), and (34.50±8.53) Mm-1, respectively. PM2.5 played a major role in atmospheric extinction during heavy pollution episodes. Specifically, nitrate (38.9%-48.8%), sulfate (31.1%-40.7%), and OM (9.9%-21.8%) were the most important extinction components. The contribution of PM2.5 chemical components to the extinction coefficient varied significantly between the three episodes; the percentage of nitrate was higher in episode Ⅰ than in the other two episodes; in episode Ⅱ, the percentage of OM was highest, significantly affected by the discharge of fireworks; in episode Ⅲ, as traffic decreased but coal combustion emissions remained constant, the contribution of nitrate to the extinction coefficient decreased, while that of sulfate increased. Source apportionment of extinction coefficients was performed using PMF model combined with IMPROVE. Various pollution sources contributed to the extinction coefficient, namely: secondary sources (37.1%-42.0%), industrial and coal combustion (22.9%-24.2%), vehicle exhaust (23.9%-27.2%), crustal dust (5.0%-6.4%), and fireworks and biomass burning (3.9%-6.2%). Compared with episode Ⅰ, the contribution of fireworks and biomass burning increased significantly during episode Ⅱ, while the contribution of vehicle exhaust decreased significantly during episode Ⅲ. The contribution of industrial and coal combustion was similar during all three heavy pollution episodes. According to backward analysis, the small-scale and short-distance transmissions from Hebei provinces, as well as the medium and short-distance transmissions from central Inner Mongolia, were the major sources during heavy pollution episodes in the winter in Tianjin City.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Air pollution Controlled terms:Coal - Coal combustion - Coal dust - Explosives - Light extinction - Nitrates - Sulfur compounds - Transmissions Uncontrolled terms:Absorption co-efficient - Atmospheric extinction - Combustion emissions - Extinction characteristics - Extinction coefficients - Scattering co-efficient - Short-distance transmission - Source apportionment Classification code:451 Air Pollution - 524 Solid Fuels - 602.2 Mechanical Transmissions - 741.1 Light/Optics - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.29e+01% to 2.42e+01%, Percentage 2.39e+01% to 2.72e+01%, Percentage 3.11e+01% to 4.07e+01%, Percentage 3.71e+01% to 4.20e+01%, Percentage 3.89e+01% to 4.88e+01%, Percentage 3.90e+00% to 6.20e+00%, Percentage 5.00e+00% to 6.40e+00%, Percentage 9.90e+00% to 2.18e+01% DOI:10.13227/j.hjkx.202101201 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688828 Title:Simulation Cadmium (Cd) Accumulation in Typical Paddy Soils in South China Title of translation:南方典型水稻土镉(Cd)累积规律模拟 Authors:Dai, Ya-Ting (1, 2); Fu, Kai-Dao (1); Yang, Yang (2); Wang, Mei-E (2); Chen, Wei-Ping (2, 3) Author affiliation:(1) Institute of International Rivers and Eco-Security, Yunnan University, Kunming; 650091, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Yang, Yang(yyang@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:353-358 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The simulation analysis of the migration path and soil accumulation trend of Cd in paddy soil systems could contribute to improved scientific and reasonable risk decision-making. In this study, based on a regional survey of environmental media in Youxian County, Hunan Province, a pollutant accumulation model (PAM) was built to predict the cumulative trend of Cd in paddy soils. Combined with Monte Carlo simulation, the PAM model was used to evaluate the effectiveness and sustainability of various remediation measures. Results showed that the probability of Cd accumulation in paddy soils in Youxian County exceeded that of the national soil environmental quality standard by 2-fold and was up to 82.1%, and the average accumulation rate reached 4.28 μg•(kg•a)-1 after 50 years of cultivation under current input pattern. Sensitivity analysis results showed that atmospheric deposition and rice uptake were the key processes affecting Cd accumulation in paddy soils. Results of a multi-scenario simulation showed that the comprehensive measures, such as reducing the straw returning, optimizing the layout of industrial and mining enterprises that reduce the atmospheric deposition of Cd, and cleaning irrigation water, could reduce the Cd accumulation in paddy soils by 43.7% and reduce the probability of light Cd pollution by 80.6% after 50 years, which would be an effective long-term measure to prevent and control Cd pollution risk in paddy soils.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Soil pollution Controlled terms:Air pollution - Atmospheric chemistry - Cadmium - Deposition - Irrigation - Meteorological problems - Monte Carlo methods - Risk assessment - Risk perception - Sensitivity analysis - Soils - Surveys - Sustainable development - Water pollution - Water pollution control Uncontrolled terms:Accumulation model - Atmospheric depositions - Environmental media - Environmental quality standards - Remediation measures - Risk decision making - Simulation analysis - Soil accumulations Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 453 Water Pollution - 453.2 Water Pollution Control - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations - 821.3 Agricultural Methods - 914.1 Accidents and Accident Prevention - 921 Mathematics - 922.2 Mathematical Statistics Numerical data indexing:Age 5.00e+01yr, Percentage 4.37e+01%, Percentage 8.06e+01%, Percentage 8.21e+01% DOI:10.13227/j.hjkx.202006121 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779632 Title:High-throughput Sequencing Analysis of Soil Bacterial Community in the Grain for Green Project Areas of the Loess Plateau Title of translation:高通量测序分析黄土高原退耕还林区土壤细菌群落特征 Authors:Liu, Xiao-Hua (1); Wei, Tian-Xing (1) Author affiliation:(1) Key Laboratory of State Forestry Administration on Soil and Water Conservation, Engineering Research Center of Forestry Ecological Engineering of Ministry of Education, Jixian County Station, Chinese National Ecosystem Research Network (CNERN), School of Soil and Water Conservation, Beijing Forestry University, Beijing; 100083, China Corresponding author:Wei, Tian-Xing(weitx@bjfu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4489-4499 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study analyzed the characteristics of the soil bacterial community under different types of vegetation restoration, and explored the role of microorganisms in the vegetation restoration process, within the soil ecosystem of Grain for Green areas of the Loess Plateau. Typical artificial forest (artificial Robinia pseudoacacia forest, Pinus tabulaeformis forest), natural secondary forest, and grassland were selected as the research objects. High-throughput sequencing technology was used to analyze the α diversity and community structure of soil bacteria, and the correlation between soil environmental factors and bacterial communities. The Chinese National Ecosystem Research Network in Jixian County Station was chosen as the research area. The results showed that the bacterial communities of the five types of forest restoration comprised 25 phyla, 66 classes, 129 orders, 240 families, 392 genera, 760 species, and 2213 OTUs. There were significant differences in the abundance of bacterial communities, which could be ranked as follows: CD> CSL> CH2> CH1> YS. The dominant bacteria phyla in the different vegetation restoration types were Actinobacteria, Proteobacteria, Acidobacteria, and Chloroflexi. The relative abundances of natural secondary forest, grassland, and plantation were different, but not significantly. The relative abundances of α-Proteobacteria, β-Proteobacteria, and δ-Proteobacteria were higher in natural secondary forest soilthan in the soil of the other four restoration models, and the relative abundance was the lowest in grassland soil. The dominant bacteria were significantly correlated with soil pH and TN. Among them, TN was significantly positively correlated with Actinobacteria, pH was significantly positively correlated with Proteobacteria and negatively correlated with Actinobacteria, while Acidobacteria was significantly negatively correlated with soil pH and TN. PICRUSt analysis showed that the functional gene families were mainly related to 24 sub-functions, including cell motility, signal transduction mechanisms, amino acid transport and metabolism, as well as coenzyme transport and metabolism. These results can provide a good foundation for the evaluation of vegetation restoration in the Loess Plateau, as well as a scientific basis for the rational management of plantations.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Bacteria Controlled terms:Conservation - Ecosystems - Environmental technology - Forestry - Landforms - Metabolism - Petroleum reservoir evaluation - Restoration - Sediments - Signal transduction - Soils - Vegetation Uncontrolled terms:Grain for green projects - High-throughput sequencing - Natural secondary forests - Pinus tabulaeformis forest - Robinia pseudo-acacia - Signal transduction mechanism - Soil bacterial community - Vegetation restoration Classification code:454 Environmental Engineering - 454.3 Ecology and Ecosystems - 461.9 Biology - 481.1 Geology - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 512.1.2 Petroleum Deposits : Development Operations DOI:10.13227/j.hjkx.202012233 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945291 Title:Water Chemical Characteristics and Influence of Exogenous Acids in the Yangtze River Basin Title of translation:长江流域主要干/支流水化学特征及外源酸的影响 Authors:Wang, Qi (1, 2); Yu, Shi (2); Jiang, Ping-Ping (1); Sun, Ping-An (2) Author affiliation:(1) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Science, Guilin; 541004, China Corresponding authors:Yu, Shi(yushihydrogeo@163.com); Jiang, Ping-Ping(jiangpp@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4687-4697 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the influence of human activities on the Yangtze River water chemistry, water samples were obtained from a representative section the main river stem/branch in wet and normal seasons in 2016. Ion ratio analysis, principal component analysis(PCA), and chemical ion balance calculations were performed, and carbonate rock dissolution rates were determined based on carbonate and exogenous acids. The result show that HCO3-Ca is the dominant hydrochemistry type, indicating that the dissolution of carbonate rocks in the basin is the main process affecting hydrochemistry, and carbonate acid is significant in the weathering of carbonate rocks. In addition, the proportion of carbonate acid dissolution in the wet and normal seasons accounted for 60.33% and 59.14% of the total dissolution, respectively. The dissolution ratio among the different sampling points was notable, which indicates that the carbon sink effect of exogenous acid cannot be ignored. In addition, cation exchange some influence on hydrochemistry but was not the main reaction process. Compared with hydrological monitoring data for the last few years, the weathering of rocks by sulfuric and nitrate acids has strengthened, and the negative effects of anthropogenic pollution in the Yangtze River have increased.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Principal component analysis Controlled terms:Carbonates - Carbonation - Chemical analysis - Dissolution - Hydrochemistry - Ion exchange - Positive ions - River pollution - Rivers - Sedimentary rocks - Weathering Uncontrolled terms:Carbonate rock - Cation exchanges - Chemical characteristic - Human activities - Ionic ratios - Principal-component analysis - River water - Water chemistry - Yangtze River - Yangtze River basin Classification code:453 Water Pollution - 481.2 Geochemistry - 482.2 Minerals - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Percentage 5.914E+01%, Percentage 6.033E+01% DOI:10.13227/j.hjkx.202012040 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945148 Title:Microbial Community Structure of Soil Methanogens and Methanotrophs During Degradation and Restoration of Reed Wetlands in the Songnen Plain Title of translation:松嫩平原芦苇湿地退化与修复过程中土壤细菌和甲烷代谢微生物的群落结构 Authors:Wang, Qiu-Ying (1, 2); Wang, Na (1, 2); Liu, Ying (1, 3); Chen, Gong (4); He, Hui (4); Gao, Jie (1, 2); Zhuang, Xu-Liang (1, 2); Zhuang, Guo-Qiang (1, 2) Author affiliation:(1) Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 101408, China; (3) School of Life Sciences, University of Science and Technology of China, Hefei; 230026, China; (4) School of Water Resources and Environment, China University of Geosciences, Beijing; 100083, China Corresponding authors:Gao, Jie(jiegao@rcees.ac.cn); Gao, Jie(jiegao@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4968-4976 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Wetlands are an important global source and sink of methane. However, human activities and climatic conditions are causing serious degradation of wetlands in China. In response to this, the relevant departments have progressively carried out wetland restoration projects over the past few years. To investigate the response of microbial communities of bacteria, methanogens, and methanotrophs during degradation and restoration of wetlands, soil samples were collected from undegraded reed wetlands, degraded reed wetlands, and restored reed wetlands in the Songnen Plain. Microbial diversity and community composition were studied by high-throughput sequencing based on the 16S rRNA gene of bacteria, the mcrA gene of methanogens, and the pmoA gene of methanotrophs. The results indicate that the degradation of reed wetlands results in a decrease in bacterial and methanogenic α-diversity and an increase in methanotrophic α-diversity. Bacterial α-diversity and methanogenic α-diversity were both significantly positively correlated with soil water content. At different taxonomic levels, higher relative abundances of Rhizobiales and Methanobacteriaceae were detected in the undegraded wetland soils. Wetland degradation decreased the relative abundance of Rhizobiales but increased that of the pathogenic bacteria Burkholderiaceae and microorganisms resistant to harsh and extreme environments including Sphingomonas, Rubrobacter, Methylobacter, Methylomonas, and Methylococcus. In the restored wetland soils, the relative abundances of Bacillus, Methanosarcinaceae, Methanomicrobiaceae, and the type Ⅱ methanotroph Methylocystis were higher. Therefore, different wetland conditions can indirectly change soil properties and, consequently, change the community structure of methanogens and methanotrophs.
© 2021, Science Press. All right reserved. Number of references:55 Main heading:Wetlands Controlled terms:Bacteria - Bacteriology - Biodegradation - Genes - Restoration - RNA - Soil moisture Uncontrolled terms:Bacterial community structure - Methanogen and methanotroph - Methanotrophs - Microbial communities - Microbial community structures - Relative abundance - Rhizobiales - Songnen plain - Structure of soils - Wetland soils Classification code:461.2 Biological Materials and Tissue Engineering - 461.8 Biotechnology - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry DOI:10.13227/j.hjkx.202102172 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945317 Title:Characteristics of Bacterial Community Structure in Fluvo-aquic Soil Under Different Rotation Fallow Title of translation:不同轮作休耕下潮土细菌群落结构特征 Authors:Nan, Zhen-Wu (1); Liu, Zhu (1); Dai, Hong-Cui (1); Zhang, Lei (2); Wang, Na (1); Xu, Jie (1); Liu, Kai-Chang (1); Meng, Wei-Wei (1); Wang, Xu-Qing (1) Author affiliation:(1) National Engineering Laboratory of Wheat and Maize, Crop Research Institute, Shandong Academy of Agricultural Sciences, Ji'nan; 250100, China; (2) Yantai Academy of Agricultural Sciences, Yantai; 265500, China Corresponding authors:Meng, Wei-Wei(wdlmww@163.com); Wang, Xu-Qing(saaswxq@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4977-4987 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The aim of this study was to provide a reference for promoting ecological restoration of farmland and the green development of agriculture in the alluvial plain of the lower Yellow River by determining the effects of different rotation fallow patterns on the bacterial community of the fluvo-aquic soil. Farmland soil subject to a long-term rotation fallow experiment since 2018 was studied using Illumina MiSeq high-throughput sequencing technology, and the 'Tax4Fun' bacterial function prediction tool was used to analyze differences in soil bacterial community structure and function under the following four rotation fallow regimes: long fallow(LF), winter wheat and summer fallow(WF), winter fallow and summer maize(FM), and annual rotation of winter wheat and summer maize(WM). The environmental factors affecting changes in the soil bacterial community structure and function were also analyzed. In total, 44 phyla, 146 classes, 338 orders, 530 families, 965 genera, and 2073 species of bacteria were detected in the soil samples from the different rotation fallow regimes, and the dominant bacterial groups were Actinobacteria, Proteobacteria, Acidobacteria, and Chloroflexi in 0-20 cm and 20-40 cm soil layers. However, the relative abundances of the dominant bacteria groups were varied between the rotation fallow regimes. In the 0-20 cm layer of the seasonal fallow soils(WF and FM), bacteria were more abundant and community diversity was higher than that of the WM and LF soils. In 20-40 cm soil layer, the WF soil was more abundant in bacterial and the community was more diverse. Based on the prediction function of the 'Tax4Fun' tool, six primary metabolic pathways, 40 secondary metabolic pathways(18 types with relative abundance greater than 1%), and 264 tertiary metabolic pathways were identified in the soil bacteria of the different rotation fallow regimes. Seasonal fallow(WF and FM)was found to increase the relative abundance of beneficial bacterial metabolic pathways involved in metabolism, environmental information processing, and genetic information processing. According to RDA analysis, the soil bacterial community in the 0-20 cm soil layer was significantly affected by soil moisture, total phosphorus, available phosphorus, available potassium, pH, and C/N ratio(P< 0.05), and the soil bacterial community in 20-40 cm soil layer was significantly affected by soil total phosphorus and available phosphorus(P< 0.05). Therefore, different fallow patterns were linked to variation in the structure, diversity, and metabolic functions of soil bacterial communities. Based on these results, seasonal fallow practices could promote the health and stability of farmland soil ecosystems.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Forecasting Controlled terms:Bacteria - Crops - Farms - Frequency modulation - Genes - Phosphorus - Rotation - Soil moisture Uncontrolled terms:Bacterial community structure - Community structures - Fallow - Fluvo-aquic soils - Function prediction - Metabolic pathways - Relative abundance - Soil bacterial community - Soil bacterium - Soil layer Classification code:461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 931.1 Mechanics Numerical data indexing:Percentage 1.00E00%, Size 0.00E00m to 2.00E-01m, Size 2.00E-01m to 4.00E-01m DOI:10.13227/j.hjkx.202103117 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945507 Title:Continuous PM2.5 Composition Measurements for Source Apportionment During Air Pollution Events Title of translation:PM2.5化学组分连续观测在污染事件源解析中的应用 Authors:Cai, Fan-Tao (1); Shang, Yue (1); Dai, Wei (1); Xie, Ming-Jie (1) Author affiliation:(1) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Xie, Ming-Jie(mingjie.xie@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4575-4581 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the application of high-temporal-resolution data in PM2.5 source apportionment during air pollution events, ambient air PM2.5 components were continuously monitored in urban Nanjing from January to December, 2017. Commercially available instruments for continuous measurements were deployed to obtain hourly concentrations of elements, water-soluble ions, and carbonaceous components of PM2.5. Data for 15 elements and 5 bulk components during three pollution events(firework combustion during the Spring Festival, a spring sandstorm, and a winter haze event)and across the whole year comprised four datasets for source apportionment using positive matrix factorization(PMF), and the distribution of factor/source contributions and estimations of average concentrations of characteristic components were compared based on different input datasets(PMFfirework-sand-haze and PMFfull-year). The results showed that the identified factors/sources, factor profiles, and contributions differed largely between PMFfirework-sand-haze and PMFfull-year solutions. For example, the relative average contribution of the firework combustion factor derived from the PMFfull-year solution(was 1.50%)was far less than that of the PMFfirework solution. The dust factor had an average contribution of 8.51% in the PMFsand solution, which was approximately double that of the PMFfull-year solution. This might be explained by the fact that PMF assumes unvaried source compositions during the measurement campaign, meaning that the source apportionment results based on long-term observations will include bias due to changes in emission sources. Furthermore, during the firework combustion event, the estimated average concentration of K from the PMFfirework solution [(1.32±1.17)μg•m-3, P=0.64]was closer to measured value [(1.36±1.19)μg•m-3]than that of the PMFfull-year solution [(1.16±1.19)μg•m-3, P=0.009 0]. For the sand storm event, the concentrations of Fe, Si, and Ti were significantly underestimated by the PMFfull-year solution [(0.061±0.042)-(1.06±0.65)μg•m-3, P< 0.05], while their peak concentrations agreed well between the PMFsand estimations and the observations. During the winter haze event, all PM2.5 bulk components were well estimated by both the PMFfull-year and PMFhaze solutions. Based on these results, PMF source apportionment results based on continuous measurement data during pollution events can reasonably reflect short-term variations in characteristic PM2.5 components and their sources, which can improve the timeliness of air pollution source apportionment.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Storms Controlled terms:Air pollution - Combustion - Explosives - Factorization - Sand Uncontrolled terms:Average concentration - Bulk components - Continuous measurements - Continuous monitoring - Contribution distribution - PM 2.5 - Pollution event - Positive Matrix Factorization - Positive matrix factorization source apportionment - Source apportionment Classification code:443.3 Precipitation - 451 Air Pollution - 483.1 Soils and Soil Mechanics - 921 Mathematics Numerical data indexing:Percentage 1.50E+00%, Percentage 8.51E+00% DOI:10.13227/j.hjkx.202102151 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945262 Title:Community Distribution of the Rhizospheric and Endophytic Bacteria of Phragmites australis and Their Limiting Factors in Iron Tailings Title of translation:铁尾矿芦苇根际微生物和根内生菌群落分布及其限制性因子解析 Authors:Cao, Man-Man (1); Wang, Fei (1); Zhou, Bei-Hai (1); Chen, Hui-Lun (1); Yuan, Rong-Fang (1) Author affiliation:(1) School of Energy & Environmental Engineering, University of Science and Technology Beijing, Beijing; 100083, China Corresponding author:Wang, Fei(wangfei@ustb.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4998-5009 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The composition of the rhizospheric and endophytic bacteria Phragmites australis in spring and summer around the Qiananling iron tailings reservoir in the Huairou District of Beijing was studied using Illumina high-throughput sequencing technology. Sequencing identified 40 phyla, and Proteobateria and Actinobacteria were the dominant phyla in all samples, accounting for more than 80% of the sequences in all samples. At the genus level, Pseudoarthrobacter was dominant. α-diversity analysis showed that species richness(Sobs, Chao)and species diversity indexes(Shannon, PD)of the rhizosphere soil microorganisms were significantly higher than those of endophytes. The maximum and minimum differences of the Sobs, Chao, Shannon, PD indexes were 1 336, 1 582.24, 6.48, and 81.18, respectively. β-diversity analysis indicated that there were significant differences in the community compositions of rhizosphere soil microorganisms and root endophytes, while now notable differences were observed between samples in different seasons. In addition, the dominant strains in each sample(such as Pseudomonas, Arthrobacter, and Streptomyces)were highly resistant to heavy metals. Among the 774 genera, a total of 250 genera coexisted in four types of samples, indicating that the microbial community composition of different samples had some degree of similarity. Correlation analysis between soil physical and chemical properties showed that Ni, Fe, available phosphorus, effective sulphur, and organic matter were significantly related to the microbial communities. Through the prediction of COG function, it was found that the microbial metabolic functions(i.e., energy production and conversion, amino acid transport and metabolism, carbohydrate transport and metabolism, inorganic ion transport, and metabolism)were abundant.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Bacteria Controlled terms:Biodiversity - Chemical analysis - Heavy metals - Metabolism - Soils Uncontrolled terms:Diversity analysis - Endophytic bacteria - Heavy metals pollution - High-throughput sequencing - Iron tailings - Microbial diversity - Phragmites australis - Rhizosphere microorganisms - Rhizospheric bacteria - Shannon Classification code:454 Environmental Engineering - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography Numerical data indexing:Percentage 8.00E+01% DOI:10.13227/j.hjkx.202103052 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945453 Title:Characteristics and Mechanisms of Bacteriophage MS2 Inactivation in Water by UV Activated Sodium Persulfate Title of translation:紫外活化过硫酸钠灭活水中噬菌体MS2的特性及机制 Authors:Zhang, Chong-Miao (1, 2, 3); Yang, Hao-Ming (1, 2, 3); Wang, Zhen (1, 2, 3) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4807-4814 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Viruses in the aquatic environment have strong resistance to common disinfection techniques. To contribute to the development of efficient virus inactivation technologies, the characteristics and mechanisms of virus inactivation in a UV activated sodium persulfate(UV/PS)system were studied. The inactivation rate and kinetic characteristics of bacteriophage MS2 in water samples by the UV/PS were studied. The effects of PS dosage, pH, and the initial concentration of bacteriophages on the inactivation effect were also investigated. Furthermore, the morphologies of phages before and after UV/PS treatment were observed by transmission scanning electron microscope, and the free radicals in the reaction system were identified by electron paramagnetic resonance spectroscopy. By means of a free radical quenching experiment, the contribution rate of various factors in the UV/PS system to phage inactivation was also analyzed and calculated. The results showed that when the UV irradiation intensity was 160 μW•cm-2, the phage MS2 of 4.39 lg could be removed after UV/PS treatment for 4 min, which was 1.44 lg higher than that of the same UV dose alone. The inactivation of phage MS2 by the UV/PS system was in accordance with the first-order kinetic model. Increasing the initial concentration of PS in the system significantly improved the inactivation rate of phages, while pH and the initial concentration of phages had little effect on the inactivation rate. UV/PS treatment damages the capsid of phages and promotes the aggregation of phage particles. The presence of SO4-• and •OH in the UV/PS system was an important factor for the inactivation of MS2 phages. Finally, •OH contributed more to MS2 phage inactivation than SO4-•.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Bacteriophages Controlled terms:Electron spin resonance spectroscopy - Free radicals - Irradiation - Paramagnetic resonance - pH effects - Scanning electron microscopy - Sodium compounds Uncontrolled terms:Aquatic environments - Bacteriophage MS2 - Characteristics and mechanisms - Inactivation - Initial concentration - MS2 phage - Phage MS2 - Sodium persulfate - UV activation - Virus inactivation Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 801 Chemistry - 801.1 Chemistry, General Numerical data indexing:Power 1.60E-04W, Time 2.40E+02s DOI:10.13227/j.hjkx.202102068 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945248 Title:Concentration and Reactivity of Carbonyl Compounds in the Atmosphere of North China Title of translation:华北区域大气中羰基化合物体积分数水平及化学反应活性 Authors:Huang, Yu (1); Chen, Xi (2); Wang, Ying-Hong (3); Liu, Zi-Rui (3); Tang, Gui-Qian (3); Li, Xing-Ru (2) Author affiliation:(1) School of Resources, Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Department of Chemistry, Capital Normal University, Beijing; 100048, China; (3) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China Corresponding author:Li, Xing-Ru(lixr@cnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4602-4610 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To reveal the characteristics of photochemical pollution in North China, adsorbing columns with 2, 4-dinitrophenylhydrazine(DNPH)were used to sample carbonyl compounds in Shijiazhuang and Xinglong between May 2018 and April 2019. The samples were analyzed by high-performance liquid chromatography to understand the composition, volume fraction, source, •OH loss rate, and ozone formation potential of the carbonyl compounds. A total of 13 carbonyl compounds containing carbonyl groups were determined, of which acetone, formaldehyde, and acetaldehyde were highest at(6.46±5.25)×10-9, (3.76±2.29×10-9), and(2.65±1.74)×10-9 in Shijiazhuang compared to(1.85±1.27)×10-9, (1.29±1.02)×10-9, and(0.72±0.48)×10-9 in Xinglong, respectively. The estimated maximum ozone formation potential(OFP)of formaldehyde was much higher than that of acetaldehyde; the C1/C2 and C2/C3 ozone formation potential(OFP)of formaldehyde was much higher than that of acetaldehyde; and the C1/C2 and C2/C3 values showed that vehicle exhaust and fossil fuel combustion were the main sources in Shijiazhuang in association with the higher level of industrialization. In Xinglong, the carbonyl compounds mainly originated from natural sources. Acetaldehyde(1.77 s-1), formaldehyde(1.57 s-1), and butyraldehyde(0.42 s-1)contributed most to L•OH in Shijiazhuang, and formaldehyde(0.53 s-1), acetaldehyde(0.47 s-1), and butyraldehyde(0.12 s-1)were the three main contributors to L•OH in Xinglong. The carbonyl compounds contributing most to O3 production were formaldehyde and acetaldehyde at(34.61×10-9 O3) and (16.73×10-9 O3)in Shijiazhuang, compared to (11.77×10-9 O3) and (4.47×10-9 O3) in Xinglong, respectively.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Acetaldehyde Controlled terms:Acetone - Formaldehyde - Fossil fuels - High performance liquid chromatography - Ozone Uncontrolled terms:Carbonyl groups - Dinitrophenylhydrazine - High-performance liquid chromatography - Loss rates - North China - Ozone formation potentials - Photochemical pollution - Source - Vehicle exhausts - •OH loss rate Classification code:804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Time 1.20E-01s, Time 1.57E+00s, Time 1.77E+00s, Time 4.20E-01s, Time 4.70E-01s, Time 5.30E-01s DOI:10.13227/j.hjkx.202011190 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945485 Title:Effects of Land Use on Nutrient Concentrations in the Inflow River of Lake Taihu, China Title of translation:土地利用对太湖入流河道营养盐的影响 Authors:Lian, Xin-Qiao (1, 2); Zhu, Guang-Wei (1); Yang, Wen-Bin (2); Kang, Li-Juan (1); Zhu, Meng-Yuan (1); Xu, Hai (1) Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) School of Ecology and Environment, Anhui Normal University, Wuhu; 241002, China Corresponding author:Zhu, Guang-Wei(gwzhu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4698-4707 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Land use is an important factor affecting non-point nutrient loading. Here, the Wuxi River basin was selected to analyze the influence of sub-basin land use on nutrient concentrations using remotely sensed land use data and monthly river water quality variables from October 2019 to September 2020. The results showed that the water quality of the river was closely related to land-use type. Specifically, dryland farmland, villages, and building land have a strong promoting influence on nitrogen, phosphorus, organic carbon, and phytoplankton chlorophyll a. The proportion of orchard land was also positively correlated with river nutrient concentrations. A negative correlation was observed between the proportion of forest land and nutrient concentrations. Moreover, the proportion of the water area in rivers and reservoirs was negatively correlated with the total dissolved nitrogen and nitrate concentrations in the river, and the proportion of the water area in natural pits and fishponds was negatively correlated with river nitrate and ammonia concentrations. Furthermore, the proportion of river and fishpond areas was positively correlated with the concentration of dissolved total phosphorus, dissolved organic carbon, and the permanganate index, while the proportion of the natural pond area was positively correlated with the concentration of particulate phosphorus and phytoplankton chlorophyll a. The influence of land-use types on water quality was also affected by distance from the river. This research indicates that the appropriate utilization of land and wetlands is key to controlling non-point nutrient loading in the river network, including Lake Taihu. Specifically, the self-purification capacity of wetland waters should be incorporated into nutrient control schemes, and special attention should be paid to the reduction of non-point source pollution in the drylands along the downstream riverbanks and urbanized areas.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Land use Controlled terms:Ammonia - Chlorophyll - Dissolution - Lakes - Nitrates - Nutrients - Organic carbon - Phytoplankton - Reservoirs (water) - River pollution - Rivers - Water quality - Wetlands Uncontrolled terms:Dry land - Lake taihu - Lake taihu basin - Land use type - Nonpoint-source pollution (NPS) - Nutrient concentrations - Nutrient loading - Phytoplankton chlorophyll - River-net plain - Taihu basins Classification code:403 Urban and Regional Planning and Development - 441.2 Reservoirs - 445.2 Water Analysis - 453 Water Pollution - 461.9 Biology - 471 Marine Science and Oceanography - 802.3 Chemical Operations - 804.1 Organic Compounds - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202101065 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239984 Title:Characterization of Water-soluble Inorganic Ions in Atmospheric PM2.5 in Chengdu During the Later Stage of the Air Pollution Prevention and Control Action Plan Title of translation:《大气污染防治行动计划》后期成都大气 PM2.5中水溶性无机离子特征 Authors:Li, Jia-Qi (1); Zhang, Jun-Ke (1); Dong, Gui-Ming (1); Deng, Jia-Lin (1); Liu, Zi-Rui (2); Wang, Yue-Si (2) Author affiliation:(1) Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu; 611756, China; (2) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China Corresponding author:Zhang, Jun-Ke(zhangjunke@home.swjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5616-5623 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The purpose of this study was to investigate the seasonal variation and sources of water-soluble inorganic ions (WSIIs) in PM2.5 during the later stage of the Air Pollution Prevention and Control Action Plan in Chengdu. PM2.5 samples in different seasons were collected from 2016 to 2017 in the urban area of Chengdu, and the WSIIs in PM2.5 were analyzed. The results show that the annual average ρ(PM2.5) and ρ(WSIIs) in Chengdu were (114.0±76.4) μg•m-3 and (41.2±31.3) μg•m-3, respectively. ρ(WSIIs) accounted for 36.1% of ρ(PM2.5). The seasonal contributions of ρ(WSIIs) to ρ(PM2.5) were: autumn (39.5%)>winter (38.2%)>spring (32.5%)>summer (28.9%). The average ρ(PM2.5) and ρ(WSIIs) at night throughout the year and during each season were higher than those during the day, and the diurnal difference showed obvious seasonal variation. SNA (SO42-, NO3-, and NH4+) were important components of WSIIs and accounted for 84.2%, 86.6%, 86.3%, and 87.0% of the total ρ(WSIIs) in spring, summer, autumn, and winter, respectively. The ρ(NO3-)/ρ(SO42-) ratios in autumn and winter were 1.1 and 1.6, respectively, which were higher than the 0.96 and 0.57 ratios in spring and summer, respectively. This means that the contributions of mobile and stationary sources varied significantly with the seasons. The main sources of WSIIs during the observation period included secondary formation, dust, and combustion sources. The backward trajectory analysis shows that ρ(PM2.5) of the near-surface air mass from the eastern areas of Chengdu were lower than that of the upper air mass from the western areas. In terms of WSII composition, the contribution of ρ(SO42-) from the eastern air masses was higher than that from the western air masses, whereas the contribution of ρ(NO3-) from the western air masses was higher than the former.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Water pollution Controlled terms:Air pollution - Air pollution control Uncontrolled terms:Air mass - Air pollution prevention - Chengdu - Late stage - PM 2.5 - Pollution prevention and controls - Seasonal variation - SO 4 2- - Source apportionment - Water soluble inorganic ions Classification code:451 Air Pollution - 451.2 Air Pollution Control - 453 Water Pollution Numerical data indexing:Percentage 2.89E+01%, Percentage 3.25E+01%, Percentage 3.61E+01%, Percentage 3.82E+01%, Percentage 3.95E+01%, Percentage 8.42E+01%, Percentage 8.63E+01%, Percentage 8.66E+01%, Percentage 8.70E+01%, Size 5.12064E+01m to 5.12318E+01m, Size 6.35E-02m DOI:10.13227/j.hjkx.202104281 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239926 Title:Effects of Manure Combined Chemical Fertilizers on Soil N2O Emission and Microbial Characteristics of Wheat Crop System in Northwest Arid Title of translation:有机无机配施下西北旱区麦田土壤N2O的排放特征及微生物特性 Authors:Wang, Kai (1); Shi, Lei (1); Ma, Long (1); Wang, Shu-Ting (1); Zhang, Ran (1); Zheng, Wei (1, 2); Li, Zi-Yan (1, 2); Zhai, Bing-Nian (1, 2) Author affiliation:(1) College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling; 712100, China Corresponding authors:Zhai, Bing-Nian(bingnianzhaitg@126.com); Zhai, Bing-Nian(bingnianzhaitg@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6038-6046 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The combined application of organic and inorganic fertilizers can provide long-term and sustainable sources of nutrients for farmland. It is of great significance to study the environmental effects and soil enzyme activity microbial characteristics of farmland soil under this fertilization method for the development of dryland soil fertilization measures. In this experiment, three gradient nitrogen levels (N0, N1, and N2: 0, 150, and 300 kg•hm-2, respectively) were used as the main treatment, and chemical fertilizer alone and the combined application of organic and inorganic fertilizer (+M) were used as the secondary treatment. The N2O emission flux, soil enzyme activity, nitrate ammonium nitrogen content, and soil physical properties during the wheat growing season were measured. The results showed that the soil N2O emission flux under the N2+M treatment was 0.190 4 mg•(m2•h)-1, which was 255% higher than that of the N0 treatment. The maximum microbial biomass C and N were 346.31 mg•kg-1 and 33.36 mg•kg-1, respectively, at the tillering stage when treated with N2+M. The soil enzyme activities under the N2+M treatments were highest, followed by those under the N2 treatments, and the soil enzyme activities under the N0 and N0+M treatments were lowest. Path analysis showed that the direct factors were ammonium nitrogen, AKP, and MBN, which had a greater contribution on N2O emission flux; the effects from indirect factors were small and can be ignored. The emission flux and warming potential of N2O in the N2 and N2+M treatments were higher than those in the N1 and N1+M treatments; however, the yield was lower than that in the N1 and N1+M treatments. The environmental benefits of organic and inorganic fertilizer application in dryland wheat fields are related to many factors. Rational application of organic fertilizer can balance the comprehensive benefits of yield and soil environment.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Soils Controlled terms:Enzyme activity - Farms - Nitrogen fertilizers - Regression analysis Uncontrolled terms:Combination of organic and inorganic application - Dry land - Emissions fluxes - Inorganics - N2O emission flux - Northwest dryland - Organics - Physical and chemical properties - Physical and chemical property of soil - Soil enzyme activity Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.2 Agricultural Chemicals - 922.2 Mathematical Statistics Numerical data indexing:Mass 1.00E-06kg, Mass 3.00E+02kg, Mass 3.336E-05kg, Mass 3.4631E-04kg, Mass 4.00E-06kg, Percentage 2.55E+02% DOI:10.13227/j.hjkx.202103224 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065983 Title:Volatile Organic Compounds(VOCs)Emission Inventory from Domestic Sources in China Title of translation:中国生活源挥发性有机物排放清单 Authors:Liang, Xiao-Ming (1, 2); Chen, Lai-Guo (1); Shen, Guo-Feng (3); Lu, Qing (1); Liu, Ming (1); Lu, Hai-Tao (1); Ren, Lu (1); Sun, Xi-Bo (4); Lin, Kui (1); Liang, Ming-Yi (1); Ye, Dai-Qi (2); Tao, Shu (3) Author affiliation:(1) State Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Science, Ministry of Ecology and Environment, Guangzhou; 510655, China; (2) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (3) Key Laboratory for Earth Surface Processes of Ministry of Education, College of Urban and Environmental Science, Peking University, Beijing; 100871, China; (4) Guangdong Provincial Academy of Environmental Science, Guangzhou; 510045, China Corresponding author:Chen, Lai-Guo(chenlaiguo@scies.org) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5162-5168 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A volatile organic compounds(VOCs)emission source classification and accounting system from domestic sources in China was established for the period between 2010 and 2018. Suggestions for the prevention and treatment of VOCs from domestic sources were developed and proposed. The results showed that the total VOCs emission inventory from domestic sources in China in 2018 was 2 518 kt. Architectural decoration, asphalt road paving, cooking, and rural household biomass use source were the four largest contributors, accounting for 69.22% of the total emissions. Chemical household products and urban and rural coal use contributed equally, accounting for 10.43% and 9.98%, respectively, whilst car repair accounted for 7.75%. Shandong, Sichuan, Henan, Guangdong, Jiangsu, and Hebei were the six provinces that contributed the most(36.01%). During the 2010-2018 period, China's domestic VOCs emissions increased at a rate of 0.43%, and after reaching a peak in 2013, the emissions began to decline at a rate of 2.23%. The reason for the decline was that, on the one hand, the cleaner energy consumption of residents made a contribution to the gradual reduction of domestic coal and biomass consumption. On the other hand, the gradual saturation of housing construction in some areas, which led to a decrease in the annual construction of the country. It is recommended to promote the comprehensive management of architectural decoration, cooking methods, and car repair, while paying attention to the VOCs emissions from asphalt road paving. Meanwhile, continue to optimize the energy use structure of domestic sources, and promote the pollution control of civil coal and household biomass combustion in accordance with local regulations and multiple measures.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Coal Controlled terms:Air pollution - Asphalt - Biomass - Coal combustion - Energy utilization - Pollution control - Volatile organic compounds Uncontrolled terms:Asphalt roads - Car repair - China - Classification system - Control recommendation - Domestic source - Emission inventories - Emission sources - Source classification - Volatile organic compound emission Classification code:411.1 Asphalt - 451 Air Pollution - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 525.3 Energy Utilization - 804.1 Organic Compounds Numerical data indexing:Percentage 1.043E+01%, Percentage 2.23E+00%, Percentage 3.601E+01%, Percentage 4.30E-01%, Percentage 6.922E+01%, Percentage 7.75E+00%, Percentage 9.98E+00% DOI:10.13227/j.hjkx.202102007 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065992 Title:Nontarget Screening and Ecological Risk Assessment of Polar Organic Pollutants in Surface Water on the West Bank of Taihu Lake Title of translation:太湖西岸地表水中极性有机污染物非靶向筛查与生态风险评估 Authors:Lu, Xin-Yan (1); Wang, Fei (2); Zhang, Li-Min (2); Ren, Xiao-Ming (3); Yu, Nan-Yang (1); Wei, Si (1) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China; (2) Jiangsu Provincial Environmental Engineering Technology Co., Ltd., Nanjing; 210000, China; (3) Jiangsu Provincial Academy of Environmental Science, Nanjing; 210036, China Corresponding author:Yu, Nan-Yang(yuny@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5284-5293 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Emerging pollutants occur in the environment, which has become a pressing issue for environmental research. In order to comprehensively screen potential polar organic pollutants in surface water of Wujin and Yixing in the Taihu Lake Basin, nontarget screening was carried out by high performance liquid chromatography(HPLC)and time of flight mass spectrometry(TOF-MS). Screened by accurate mass, isotope distribution, and MS/MS information, 162 organic compounds were identified, including 46 pesticides, 34 drugs, 8 personal care products, and 27 additives; 17 organic synthetic intermediates and 30 metabolites, 45 of which have been verified by reference standards. Through the quantitative analysis of 42 pollutants and ecological risk assessment of 3 trophic model species, it was found that 25 pollutants posed medium risk while 12 pollutants presented high risk. Nontarget screening can be used to identify potential pollutants with no prior information or standards. It is not only fast, accurate, and has high analytical flux, but also provides an important basis for subsequent ecological risk assessment.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Risk assessment Controlled terms:Additives - High performance liquid chromatography - Inductively coupled plasma - Mass spectrometers - Mass spectrometry - Metabolites - Organic pollutants - Pesticides - Surface waters Uncontrolled terms:Distribution - Ecological risk assessment - Emerging pollutants - Non-target screenings - Pharmaceutical and personal care products - Pressung - Taihu lakes - Time-of-flight mass spectrometers - Transformation products - West banks Classification code:444.1 Surface Water - 801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention - 932.3 Plasma Physics DOI:10.13227/j.hjkx.202103114 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065978 Title:Characteristics of Industrial Volatile Organic Compounds(VOCs)Emission in China from 2011 to 2019 Title of translation:2011~2019年中国工业源挥发性有机物排放特征 Authors:Liu, Rui-Yuan (1); Zhong, Mei-Fang (1); Zhao, Xiao-Ya (1); Lu, Shi-Wen (1); Tian, Jun-Tai (1); Li, Yin-Song (1); Hou, Mo (1); Liang, Xiao-Ming (1); Huang, Hao-Min (1, 2, 3, 4); Fan, Li-Ya (1, 2, 3, 4); Ye, Dai-Qi (1, 2, 3, 4) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) National Engineering Laboratory for Volatile Organic Compounds Pollution Control Technology and Equipment, Guangzhou; 510006, China; (3) Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou; 510006, China; (4) Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal, Guangzhou; 510006, China Corresponding authors:Ye, Dai-Qi(cedqye@scut.edu.cn); Ye, Dai-Qi(cedqye@scut.edu.cn); Ye, Dai-Qi(cedqye@scut.edu.cn); Ye, Dai-Qi(cedqye@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5169-5179 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to better understand the industrial volatile organic compounds(VOCs)emissions in China in recent years, an industrial VOCs emission inventory was developed from 2011 to 2019, based on the dynamic emission factors method and the comprehensive source classification system. The results showed that VOCs emissions increased first from 11 122.7 kt in 2011 to 13 397.9 kt in 2017, and then decreased to 13 247.0 kt in 2019. The emission structure of the four source categories changed. The contribution from basic organic chemical industries, gasoline storage and transportation, manufacturing(i.e., coatings, inks, pigments, and similar products), and industrial protective coatings continued to increase. On the contrary, the contributions of oil and natural gas processing, automobile, and container manufacturing industries declined over the study period. Among the industrial emissions in China in 2019, industrial coating, printing, and basic organic chemical industries emitted large amounts of VOCs(accounting for 39.2% of the total emission), and because their contribution became increasingly prominent since 2011, these sectors will be the key emission sources in the future. With respect to the spatial distribution in 2019, East China and South China had the largest VOCs emissions. Shandong, Guangdong, Jiangsu, and Zhejiang were the four provinces that contributed the most, accounting for 40.6% of the total VOCs emissions.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Volatile organic compounds Controlled terms:Chemical industry - Industrial chemicals - Industrial emissions - Manufacture - Organic chemicals - Protective coatings Uncontrolled terms:China - Classification system - Emission characteristics - Emission factors - Emission inventories - Factor methods - Industrial sources - Source classification - Storage and transportations - Volatile organic compound emission Classification code:451.1 Air Pollution Sources - 537.1 Heat Treatment Processes - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds - 805 Chemical Engineering, General - 913.4 Manufacturing Numerical data indexing:Percentage 3.92E+01%, Percentage 4.06E+01% DOI:10.13227/j.hjkx.202102112 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126262 Title:Biodegradation of Algae-derived Organic Matter (I-DOM) from Lake Taihu Title of translation:太湖蓝藻胞内有机质的微生物降解 Authors:Zhang, Qiao-Ying (1, 2); Sun, Wei (1, 3); Du, Ying-Xun (1); Gong, Xiao-Li (1, 4) Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Science, Beijing; 100049, China; (3) Huangjing Town People's Government, Taicang; 215427, China; (4) Nanjing Wondux Environmental Protection Technology Co., Ltd., Nanjing; 211100, China Corresponding author:Du, Ying-Xun(yxdu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1870-1878 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A large amount of intracellular dissolved organic matter (I-DOM) is released during the senescent phase of phytoplankton cultures. This research investigated the bio-incubation of I-DOM of cyanobacteria in Lake Taihu under various temperatures (20, 25, and 30℃) and I-DOM initial concentrations (5, 10, and 20 mg•L-1) with the aid of ultraviolet-visible spectroscopy (UV-Vis) and three-dimensional fluorescence matrix-parallel factor (EEM-PARAFAC). I-DOM was effectively degraded during the incubation. After 14 days, the DOC removal ratio was 50%~74%. A tryptophan-like component (C1), a ubiquitous humic-like component (C2), and two microbially-derived humic-like components (C3 and C4) contributed 80.0%, 16.0%, 3.7%, and 0.3% to the initial I-DOM, respectively. During the bio-degradation, these components are not only consumed but also produced. C1 decreased during the incubation, while C3 and C4 increased at the beginning of biodegradation and then decreased. The change trend of C2 was complicated, i.e., it decreased firstly and then increased, but decreased again after 7 days. The changes in the optical indices of Sr, E2:E3 and HIX revealed that the molecular weight of DOM increased, and the aromaticity was enhanced during degradation. The reaction temperature and the initial concentration of I-DOM did not change the trend of the PARAFAC components. The temperature of 25℃ was the most suitable for I-DOM bio-degradation. Additionally, the degradation of I-DOM was enhanced with the increase in the initial concentration of I-DOM. Combined with our study on the photodegradation of I-DOM, the possible fate of I-DOM in Lake Taihu was proposed. The tryptophan-like compound could be effectively degraded, while the humic-like components could not be degraded completely. These humic-like components would potentially settle through adsorption or coprecipitation with metal substances. These results are helpful to understand the fate of I-DOM released by a cyanobacteria bloom in Lake Taihu.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Biodegradation Controlled terms:Amino acids - Biogeochemistry - Lakes - Organic compounds - Ultraviolet visible spectroscopy Uncontrolled terms:Aromaticities - Change trends - Cyanobacteria blooms - Dissolved organic matters - Initial concentration - Optical indices - Reaction temperature - Three-dimensional fluorescences Classification code:461.8 Biotechnology - 481.2 Geochemistry - 804.1 Organic Compounds Numerical data indexing:Age 1.92e-02yr, Age 3.84e-02yr, Mass_Density 2.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.60e+01%, Percentage 3.70e+00%, Percentage 8.00e+01% DOI:10.13227/j.hjkx.202007227 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650999 Title:Enrichment of Antibiotic Resistant Bacteria and Antibiotic Resistance Genes by Sulfamethoxazole in the Biological Treatment System of Mariculture Wastewater Title of translation:磺胺甲唑对海水养殖废水处理过程中抗性细菌及抗性基因的富集作用 Authors:Wang, Jin-Peng (1); Zhao, Yang-Guo (1, 2); Hu, Yu-Bo (1) Author affiliation:(1) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (2) Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China Corresponding author:Zhao, Yang-Guo(ygzhao@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3791-3798 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Although antibiotics are heavily used in mariculture, only a small portion of the added antibiotics is absorbed. Little is known about the response process of antibiotics, antibiotic resistant bacteria, and antibiotic resistance genes to antibiotic-containing wastewater entering a wastewater treatment system. In this study, an anoxic/aerobic moving bed biofilm reactor (A/O-MBBR) was used to treat marine aquaculture wastewater containing sulfamethoxazole (SMX). The antibiotics and resistance genes in the reactor were then evaluated under selective SMX pressure, and the changing abundance patterns and the response of microbial communities and cultivable resistant bacterial populations were further explored. The results show that with an influent SMX concentration of 500 μg•L-1 and a hydraulic retention time of 8 h, SMX had a slight effect on the removal rate of NH4+-N and NO2--N, following which the performance gradually recovered. During this stage, SMX removal reached approximately 32%, with more than 78% of SMX removed from the hypoxic zone. The resistance gene was more significantly enriched in the hypoxic zone than in the aerobic zone. In the hypoxic zone, the absolute abundance of gene sul1 increased by 2.43 log, whereas that of gene sul2 increased by 1.71 log. In the region, the absolute abundance of sul1 increased by 1.17 log, whereas that of sul2 increased by 0.91 log. Resistant plate culture and high-throughput sequencing showed that the genus Pseudoalteromonas was the most dominant culturable resistant bacteria in the reactor. The genus Pseudomonas predominated in the uncultured resistant bacteria in the reactor. This study showed that marine aquaculture wastewater containing SMX promotes the enrichment of resistance genes, causing the abundance of some resistant bacteria to increase significantly.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Antibiotics Controlled terms:Aquaculture - Bacteria - Biological water treatment - Genes - Marine biology - Wastewater treatment Uncontrolled terms:Antibiotic resistance genes - Antibiotic-resistant bacteria - Biological treatment systems - High-throughput sequencing - Hydraulic retention time - Marine aquaculture wastewaters - Moving bed biofilm reactors - Wastewater treatment system Classification code:445.1 Water Treatment Techniques - 452.4 Industrial Wastes Treatment and Disposal - 461 Bioengineering and Biology - 821.3 Agricultural Methods Numerical data indexing:Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 3.20e+01%, Percentage 7.80e+01%, Time 2.88e+04s DOI:10.13227/j.hjkx.202012287 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239878 Title:Effects of Nitrogen and Phosphorus Additions on Soil Microorganisms in Saline-alkaline Grassland Title of translation:氮磷添加对盐渍化草地土壤微生物特征的影响 Authors:Yang, Jian-Qiang (1); Diao, Hua-Jie (2, 3, 4); Hu, Shu-Ya (3, 5); Chen, Xiao-Peng (2, 3, 4); C.-H., Wang Author affiliation:(1) College of Life Sciences, Shanxi Agricultural University, Taigu; 030801, China; (2) College of Grassland Science, Shanxi Agricultural University, Taigu; 030801, China; (3) State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing; 100093, China; (4) Youyu Loess Plateau Grassland Ecosystem Research Station, Youyu; 037200, China; (5) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding authors:Wang, Chang-Hui(wangch@ibcas.ac.cn); Wang, Chang-Hui(wangch@ibcas.ac.cn); Wang, Chang-Hui(wangch@ibcas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6058-6066 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Soil microbial composition and community structure in salinization grassland are substantially different from those of non-saline-alkaline natural grassland due to the lower soil nutrients, inferior natural conditions, and higher soil salinization stress. Nitrogen (N) and phosphorus (P) are main factors that limit the productivity in semi-arid grassland, and whether soil microorganisms are affected by the addition of N and P in nutrient limitation and salinization grassland is still unclear. This experiment was conducted in Youyu Loess Plateau Grassland Ecosystem Research Station, Shanxi Province. Four treatments were set in 2017, which included the control (CK), N addition (N), P addition (P), and N and P addition (NP). The ammonia-oxidizing microorganisms [i.e., ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA)], soil bacteria (B) and fungi (F) composition, and soil microbial biomass carbon and nitrogen (MBC and MBN, respectively), as well as soil pH and base cations, were measured during the growing season in 2020. Our results showed that: ① the sampling month had the main effect on soil ammonia-oxidizing microorganisms, soil bacterial and fungal composition, and microbial biomass, which were regulated by precipitation distribution, soil water content, and plant factors. ② Compared with that under the control, the ratio of AOA/AOB was significantly decreased by 51% under N addition, whereas P addition had no significant effect on soil microbial characteristics (ammonia-oxidizing microorganisms, bacterial and fungal composition, and microbial biomass). However, the NP treatment significantly increased AOB by 64.1% and decreased the ratio of AOA/AOB by 59.6%. ③ Single addition of N and P had no significant effect on soil pH, whereas the simultaneous addition of N and P significantly reduced soil pH. Though N and P additions had no significant effect on soil base cations, structural equation models (SEM) showed that soil base cations had a direct regulatory effect on soil microorganisms (bacterial and fungal composition). ④ Soil water content had the highest explanatory power for the variation in soil microorganisms based on the results of the SEM. In conclusion, our study shows that soil AOB is more sensitive to nutrient addition, and short-term nutrient addition could increase the abundance of AOB, thus promoting nutrient transformation.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Bacteria Controlled terms:Alkalinity - Ammonia - Biomass - Ecosystems - Fungi - Nitrogen - Nutrients - pH effects - Phosphorus - Positive ions - Soil moisture Uncontrolled terms:Alkalines - Ammonia oxidizing bacteria - Ammonia-oxidizing archaea - Ammonia-oxidizing microorganism - Effect on soils - Nitrogen additions - Nitrogen and phosphorus - Phosphorus addition - Saline-alkaline grassland - Soil micro-organisms Classification code:454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 5.10E+01%, Percentage 5.96E+01%, Percentage 6.41E+01% DOI:10.13227/j.hjkx.202105003 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239870 Title:Characteristics and Main Influencing Factors of Black Carbon Aerosol in Beijing Title of translation:北京市黑碳气溶胶浓度特征及其主要影响因素 Authors:Cao, Yang (1, 2); An, Xin-Xin (1, 2); Liu, Bao-Xian (1, 2); Jing, Kuan (1, 2); Wang, Qin (1, 2); Luo, Xiao-Xu (1, 2) Author affiliation:(1) Beijing Municipal Ecological and Environmental Monitoring Center, Beijing; 100048, China; (2) Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology, Beijing; 100048, China Corresponding authors:Liu, Bao-Xian(liubaoxian28@163.com); Liu, Bao-Xian(liubaoxian28@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5633-5643 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Black carbon (BC), PM2.5, CO, NOx, and meteorological factors were observed throughout 2019 at four different sites. The spatial and temporal characteristics of BC were analyzed along with the main influencing factors. The main results were as follows: the average ρ(BC) were (1.58±1.15), (2.27±1.67), (3.35±2.13), and (3.57±2.40) μg•m-3 at the background area (BA), urban area (UA), urban roadside (UR), and highway roadside (HR), respectively. BC accounted for (5.3±1.6)%, (6.0±2.3)%, (9.0±3.6)%, and (8.1±3.5)% of PM2.5 at the four sites. The ρ(BC), ρ(PM2.5), ρ(CO), and φ(NOx) at the four sites ranked in the order of BA<UA<UR<HR, except that ρ(CO) at UR was higher than that at HR. Pollutants during the heating season were 1.1-1.7 times higher than those in the non-heating season. The background ρ(BC) were estimated using the maximum frequency method, with the maximum value (0.56 μg•m-3) and minimum value (0.19 μg•m-3) being at UR and BA, respectively. The background ρ(BC), the average ρ(BC), and the proportion of BC in PM2.5 at UR and HR were higher than those at UA and BA, as a result of traffic emissions. The ρ(BC) showed bimodal diurnal variations, and the heating season curve was higher than the non-heating season curve throughout the day. Further, the morning peak (07:00-08:00) was higher in the non-heating season, and the midnight peak (00:00-02:00) was higher during the heating season, with the minimum always occurring in the afternoon (14:00-16:00). The absorption Angstrom exponents (AAE) were 1.38, 1.34, 1.26, and 1.26 at the four sites (BA, UA, UR, and HR, respectively). It was concluded that BC was dominated by fossil fuel emissions in the entire city. AAE in the heating season (1.46) was higher than that in the non-heating season (1.23) as a result of the high proportion of biomass combustion. The diurnal variation trend of the AAE at the four sites showed the similar trend during the non-heating season of high values in the afternoon and low values in the early morning, indicating that low AAE was caused by vehicle activity. The Pearson correlation coefficients (r) between BC and PM2.5, CO, NOx, wind speed, and relative humidity were 0.86, 0.81, 0.69, -0.37, and 0.34, respectively. The r was higher during the heating season because coal combustion contributed more as the common source of these pollutants. The ΔBC/ΔCO ratio at the four sites (BA, UA, UR, and HR) were 3.1×10-3, 3.5×10-3, 3.9×10-3, and 4.1×10-3, respectively. In a pollution episode, the increase in ρ(BC) at UA was mainly caused by regional transmission, whereas the accumulation process of BC at UR was obvious. The secondary generation process of particulate matter might occur due to the high concentration of precursors at UR.
© 2021, Science Press. All right reserved. Number of references:51 Main heading:Roadsides Controlled terms:Air pollution - Carbon - Heating - Nitrogen oxides Uncontrolled terms:Absorption angstrom exponent - Angstrom exponent - Black carbon - Concentration characteristic - Diurnal variation - Heating season - Pollution episodes - Roadside site - Urban areas - Urban roadsides Classification code:406 Highway Engineering - 451 Air Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass 1.90E-10kg, Mass 5.60E-10kg DOI:10.13227/j.hjkx.202103049 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239944 Title:Prediction of Total Nitrogen Load in Yangtze River Basin Title of translation:长江流域总氮排放量预测 Authors:Ding, Zhao-Wei (1, 2); Zheng, Hua (1) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Zheng, Hua(zhenghua@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5768-5776 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Water pollution is one of the serious environmental problems in the Yangtze River Basin. Predicting the trend of pollutant load can provide a scientific foundation for watershed ecological management. In this study, we used CLUE-S, InVEST, and grey system prediction models to predict the nonpoint and point total nitrogen (TN) pollution load under future ecological management and economic development scenario in the Yangtze River Basin and analyze the change in TN pollution load from 2015-2025. The results showed that, during 2015 to 2025, the nonpoint TN loads had been reduced by 23.96%. Nonpoint TN load decreased sharply in the middle and downstream watershed, whereas it increased in some upstream watersheds. The point TN load increased by 1.79%, which was mainly attributed to the increase in domestic wastewater. The municipal TN load in urban agglomerations increased significantly, whereas the point TN load decreased in some hilly areas of middle and downstream watershed. Overall, the TN load is predicted to decrease by 2.67% in 2025 but it still increases in 37.64% area of Yangtze River basin. Furthermore, more effective measures should be taken to control the nonpoint pollution in upper stream and point pollution from industrial and municipal areas in middle and downstream reaches. This approach based on multiple ecological models can accurately illustrate the future TN load spatial pattern and evolutionary trend, which can provide more detailed information on watershed TN control targets and improve the efficiency of watershed pollution control management.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Watersheds Controlled terms:Environmental management - Forecasting - Nitrogen - River pollution - Rivers - Water pollution control Uncontrolled terms:Down-stream - Ecological managements - Effective water pollution management - Human activities - Load predictions - Nitrogen loads - Pollution management - Total nitrogen - Total nitrogen load prediction - Yangtze River basin Classification code:444.1 Surface Water - 453 Water Pollution - 453.2 Water Pollution Control - 454.1 Environmental Engineering, General - 454.2 Environmental Impact and Protection - 804 Chemical Products Generally Numerical data indexing:Percentage 1.79E+00%, Percentage 2.396E+01%, Percentage 2.67E+00%, Percentage 3.764E+01% DOI:10.13227/j.hjkx.202103228 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239921 Title:Effect of Dry-Wet Alternation on the Immobilization of Arsenic in Red Soil by Cerium Manganese Modified Biochar Title of translation:干湿交替对铈锰改性生物炭固定红壤As的影响 Authors:Huang, Xiao-Ya (1); Li, Lian-Fang (1); Zhu, Chang-Xiong (1); Huang, Jin-Li (1); Wu, Cui-Xia (1); Ye, Jing (1) Author affiliation:(1) Key Laboratory of Agro-Environment, Ministry of Agriculture and Rural Affairs, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China Corresponding author:Li, Lian-Fang(lilianfang@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5997-6005 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Through static incubation experiments, the immobilization effect of cerium-manganese modified biochar (MBC) on arsenic (As) in red soil under dry-wet alternation aging conditions was discussed. The results showed that compared with the routine cultivation method, the application of MBC under drying and rewetting resulted in the significant reduction of the water-soluble As (WSAs) content (P<0.05) and pH value in the red soil, which decreased continuously with the increased application amount of MBC and prolonged incubation time. At the end of the experiment, the soil pH value decreased by 0.08 to 0.16 units compared with that in routine conditions. Meanwhile, the WSAs content in soils decreased significantly after adding MBC under drying and wetting alternation. After 30 days of incubation, the WSAs contents were reduced by 38.73%-51.94% in comparison with that of the routine condition and decreased by 45.64%-56.19% compared with that in the initial stage of the experiment. However, for the treatment without MBC addition, the WSAs content in soils and pH value increased significantly under these two incubation modes (P<0.05), especially for the dry-wet alternation treatment. Compared with routine incubation, the application of MBC under alternating wet and dry modes caused the reduction of non-specifically sorbed As (F1) in the soil by 33.16%-36.00%; specifically, sorbed As (F2) decreased by 7.67%-11.99%, residual phase As (F5) increased by 15.43%-42.45%, and the migration coefficient M of soil As was also significantly decreased (P<0.05). The range for the reduced percentage was 9.02%-12.75%. However, for the treatment without MBC, As activation in the soil was obvious, which was even worse under the drying and rewetting condition. As a whole, alternate wetting and drying water management is beneficial for the immobilization of As in red soil by MBC, and MBC showed advantages and potential for remediation of As-contaminated red soil with good stability.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Arsenic Controlled terms:Drying - pH - Remediation - Soil pollution - Soils - Water management - Wetting Uncontrolled terms:'Dry' [ - Arsenic - Arsenic content - Biochar - Dry-wet alternation - Modified biochar - PH value - Red soils - Water-soluble arsenic Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 804 Chemical Products Generally Numerical data indexing:Age 8.22E-02yr, Percentage 1.543E+01% to 4.245E+01%, Percentage 3.316E+01% to 3.60E+01%, Percentage 3.873E+01% to 5.194E+01%, Percentage 4.564E+01% to 5.619E+01%, Percentage 7.67E+00% to 1.199E+01%, Percentage 9.02E+00% to 1.275E+01% DOI:10.13227/j.hjkx.202105007 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239986 Title:Effects of Combined Application of Biochar with Chemical Fertilizers and Organic Fertilizers on Nutrients and Phosphorus Forms in Purple Soils Title of translation:化肥和有机肥配施生物炭对紫色土壤养分及磷赋存形态的影响 Authors:Xiang, Shu-Jiang (1); Yu, Luo (2); Xiong, Zi-Yi (1); Luo, Dong-Hai (1); Wang, Ying-Yan (1); Deng, Zheng-Xin (1); Wang, Zi-Fang (1); Gao, Ming (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Flood Control and Drought Relief Dispatching Center, Bishan District, Chongqing City, Chongqing; 402760, China Corresponding author:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6067-6077 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study investigated the changes in purple soil nutrient content and different forms of phosphorus content under the treatment of biochar combined with chemical fertilizers and organic fertilizers and explored the effects of different fertilization methods on purple soil nutrients and phosphorus forms to provide a scientific basis for the rationality of using biochar in the purple soil area. Using the pot experiment method, we established the following treatments: control (CK), traditional fertilization (F), chemical fertilizer +20 t•hm-2 rice husk biochar (FP), chemical fertilizer +10 t•hm-2 rice husk biochar +10 t•hm-2 corn biochar (FPM), organic fertilizer +20 t•hm-2 rice husk biochar (PP), and fresh organic fertilizer +20 t•hm-2 rice husk biochar (NPP). The change in soil nutrient content and the conversion between different forms of phosphorus were analyzed to identify the effects of chemical fertilizer and organic fertilizer combined with biochar on purple soil nutrients and phosphorus forms. The results showed that: ① The application of biochar can increase the pH value of the soil. Among the treatments, PP and NPP had the greatest effect on pH. The pH of the rhizosphere soil increased by 1.78 and 1.87 units, respectively, compared with that under the F treatment. ② Compared with the F treatment, the combined application of biochar (FP, FPM, PP, and NPP) significantly increased the content of soil organic matter, total nitrogen, total phosphorus, and available phosphorus, showing an obvious rhizosphere effect and significantly reducing the content of available potassium. ③ Compared with the F treatment, the PP and NPP treatments significantly increased plant biomass, plant total phosphorus, and total potassium content and significantly reduced plant total nitrogen content. ④ The most important phosphorus occurrence form in the soil was moderately active phosphorus, which accounted for 46.64% to 57.46%. The application of biochar can promote the conversion of soil insoluble phosphorus to available phosphorus, increase the ratio of active phosphorus to moderately active phosphorus, and show obvious rhizosphere effects. ⑤ The application of biochar is beneficial to the mineralization of soil organic phosphorus and can promote the conversion of NaHCO3-Po to NaHCO3-Pi, with the mineralization under the PP treatment being the most apparent. The combined application of biochar can improve the soil phosphorus status and promote the conversion of soil insoluble phosphorus to available phosphorus and the mineralization of organic phosphorus; among treatments, the PP treatment had the greatest such effects. Therefore, biochar combined with decomposed pig manure is the most effective nutrient management strategy in purple soil areas.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Soils Controlled terms:Chemical analysis - Nitrogen - Nitrogen fertilizers - Nutrients - Phosphorus - Potassium Uncontrolled terms:Biochar - Chemical fertilizers - F treatment - Organic fertilizers - Phosphorus classification - Phosphorus form - Purple soils - Rice husk biochar - Soil nutrients - Soil phosphorus Classification code:483.1 Soils and Soil Mechanics - 549.1 Alkali Metals - 804 Chemical Products Generally - 821.2 Agricultural Chemicals Numerical data indexing:Percentage 4.664E+01% to 5.746E+01% DOI:10.13227/j.hjkx.202104324 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239990 Title:Emission Reduction Potential of Air Pollutants of Thermal Power Industry Based on Carbon Emission Reduction Target and Emission Standard Constraint Scenarios Title of translation:基于碳减排目标与排放标准约束情景的火电大气污染物减排潜力 Authors:Li, Hui (1, 2); Sun, Xue-Li (2); Pang, Bo (3); Zhu, Fa-Hua (1, 2); Wang, Sheng (1); Yan, Pei (4) Author affiliation:(1) State Environmental Protection Key Laboratory of Atmospheric Physical Modeling and Pollution Control, National Environmental Protection Research Institute for Electric Power, Nanjing; 210031, China; (2) China Energy Investment Corporation Science and Technology Research Institute Co., Ltd., Nanjing; 210023, China; (3) Department of Science & Technology and Climate Change, China Meteorological Administration, Beijing; 100081, China; (4) Hunan Zhonghuan Linghang Environmental Protection Technology Co., Ltd., Changsha; 410011, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5563-5573 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the economic development forecast of China's "14th five year plan" and 2035 long-term goals, combined with the existing and strengthened policy scenarios under the strategic goal of carbon emission reduction, the power demand was predicted based on the elastic coefficient method, and the pollutant emission situation and emission reduction potential of the thermal power industry were calculated according to the development trend of pollutant emission standards. The results indicated that under different policy scenarios and emission standards, the emission levels of PM, SO2, and NOx in China's thermal power industry show different trends; by 2035, the emission reduction potential at the 2016 level is predicted to be 45.97%-85.37%, 52.61%-84.90%, and 33.80%-71.08%, respectively. The emission reduction potential brought about by policy factors under carbon emission reduction targets is more apparent than that brought about by different emission standards. Under the strengthened policy scenario, the pollutant emission reduction potential of the maintaining model standard constraint scenario is essentially equal to that of the ultra-low model, even more than or close to the effect of the tightening model standard constraint scenario under the existing policy. By strengthening the implementation of energy and power development policies, speeding up the peak of thermal power generation, and reasonably guiding thermal power units with high pollution emission levels to withdraw from production, the air pollutant emission of thermal power can also be effectively controlled, and the waste and loss of environmental protection transformation investment can be avoided.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Emission control Controlled terms:Carbon - Fossil fuel power plants - Investments Uncontrolled terms:Carbon emissions reductions - Carbon peaking and carbon neutralization - Emission reduction potentials - Emission standard - Neutralisation - Power industry - Scenarios analysis - Standard constraints - Thermal power - Thermal power industry Classification code:451.2 Air Pollution Control - 804 Chemical Products Generally Numerical data indexing:Percentage 3.38E+01% to 7.108E+01%, Percentage 4.597E+01% to 8.537E+01%, Percentage 5.261E+01% to 8.49E+01% DOI:10.13227/j.hjkx.202102167 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239904 Title:Improvement of Nitrogen and Phosphorus Adsorption and Stormwater Retention Capacity by Hardwood Biochar as an Additive Material in Filler Soil Title of translation:木屑生物炭对填料土的氮磷吸附及雨水持留改良影响 Authors:Meng, Yi-Ke (1); Wang, Yuan (1, 2); Wang, Chuan-Yue (1); Wang, Bao (3) Author affiliation:(1) College of Civil and Transportation Engineering, Hohai University, Nanjing; 210098, China; (2) College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing; 210098, China; (3) China Construction Infrastructure Co., Ltd., Beijing; 100029, China Corresponding authors:Wang, Yuan(wangyuanhhu@163.com); Wang, Yuan(wangyuanhhu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5876-5883 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The additive materials in bioretention facilities play a leading role in stormwater treatment to purify polluted runoff. Currently, the traditional additive materials have several problems, such as unstable purification effects of nitrogen and phosphorus and decreasing rainwater retention capacity. It has been demonstrated that hardwood biochar has the ability to retain nutrients and improve soil water retention in some soils. Here, physicochemical property tests, isothermal adsorption experiments, column experiments, and soil water characteristic curve tests have been conducted on control and hardwood biochar modified filler soil to assess the feasibility of hardwood biochar as an additive material in filler soil. The results showed that the hardwood biochar with porosity, large specific surface area, high saturated water content, and high CEC could optimize the structure of the filler soil and improve the ion exchange capacity of the filler soil. Hardwood biochar had a remarkable improvement effect on ammonium and phosphorus adsorption in the filler soil. The maximum adsorption capacity of NH4+-N increased by 2.80 times, and the removal rate increased from 31.30% to 64.10%. The maximum adsorption capacity of PO43--P increased by 1.28 times, and the removal rate increased from 61.90% to 90.00%. After the addition of hardwood biochar, the saturated water content of the filler soil increased by 1.63 times, and the permeability coefficient increased by 2.43 times. The matric suction of hardwood biochar modified filler soil at each water content increased significantly. In conclusion, the addition of hardwood biochar can optimize the performance and grading of the filler soil, enhance the adsorption of ammonium and phosphorus in rainwater runoff, and improve the bioretention systems' permeability and rainwater retention capacity.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Adsorption Controlled terms:Additives - Fillers - Grading - Hardwoods - Impact strength - Ion exchange - Phosphorus - Physicochemical properties - Runoff - Soil moisture - Soil testing Uncontrolled terms:Additive materials - Adsorption properties - Biochar - Bioretention - Bioretention system - Hardwood biochar - Nitrogen and phosphorus - Permeability characteristics - Retention capacity - Water retention capacity Classification code:442.1 Flood Control - 444.1 Surface Water - 483.1 Soils and Soil Mechanics - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 821.0 Woodlands and Forestry Numerical data indexing:Percentage 3.13E+01% to 6.41E+01%, Percentage 6.19E+01% to 9.00E+01% DOI:10.13227/j.hjkx.202104055 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066040 Title:Distribution Characteristics and Ecological Risk Assessment of Soil Heavy Metals in the Eastern Mountainous Area of the Nanyang Basin Title of translation:南阳盆地东部山区土壤重金属分布特征及生态风险评价 Authors:Lai, Shu-Ya (1, 2, 3); Dong, Qiu-Yao (2, 3); Song, Chao (2, 3); Yang, Zhen-Jing (2, 3) Author affiliation:(1) College of Earth Sciences, Hebei GEO University, Shijiazhuang; 050031, China; (2) Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang; 050061, China; (3) Key Laboratory of Quaternary Chronology and Hydro-Environmental Evolution, China Geological Survey, Shijiazhuang; 050061, China Corresponding authors:Dong, Qiu-Yao(64965341@qq.com); Dong, Qiu-Yao(64965341@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5500-5509 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The spatial distribution, pollution degree, and ecological risk of heavy metals in the soil were studied by analyzing the contents of As, Hg, Cd, Cr, Pb, Zn, Ni, and Cu and pH values in surface soil samples of the eastern mountainous area of the Nanyang basin. The results showed that the contents of Cd, Cu, Cr, Ni, Pb, Zn, and As in the soil exceeded the screening value of soil pollution risk. The spatial distribution of soil heavy metals displayed regional-and island-shaped. The highest concentration of heavy metals was found in the south of the study area, where a mining area is located. Most of the samples had no pollution levels except some samples with high contents of Cd. For As, Cr, Pb, Zn, Ni, and Cu, the potential ecological risk of most samples were low, while Cd and Hg posed medium risk in most areas. The areas with high and relatively high ecological risk index accounted for 58.93% and 37.66%, respectively. Soil Hg, Cd, and Pb contents were related to anthropogenic activities such mineral mining. As derives from geological processes, while Zn, Ni, Cr, and Cu are both controlled by anthropogenic activities and geological processes. The mining of mineral resources is the main driving factor of soil heavy metal pollution and ecological risk in the study area.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Spatial distribution Controlled terms:Geology - Heavy metals - Mineral resources - Risk assessment - Soil pollution - Soils Uncontrolled terms:Anthropogenic activity - Distribution characteristics - Ecological risk assessment - Ecological risks - Geological process - Mountainous area - Pollution assessment - Soil heavy metals - Source - Study areas Classification code:405.3 Surveying - 481.1 Geology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 902.1 Engineering Graphics - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 3.766E+01%, Percentage 5.893E+01% DOI:10.13227/j.hjkx.202103019 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404352 Title:Migration and Environmental Effects of Heavy Metals in the Pyrolysis of Municipal Sludge Title of translation:市政污泥热解过程中重金属迁移特性及环境效应评估 Authors:Jiang, Yuan-Yuan (1); Wang, Yan (1); Duan, Wen-Yan (1); Zuo, Ning (1); Chen, Fang-Yuan (1) Author affiliation:(1) Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming; 650604, China Corresponding author:Chen, Fang-Yuan(chenfy1220@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2966-2974 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Migration characteristics of the heavy metals Fe, Zn, Mn, and Ni during the preparation of biochar from municipal sludge were studied, and the optimal pyrolysis temperature for the preparation of biochar was determined based on potential environmental risks. Four heavy metals (Fe, Zn, Mn, and Ni) with high total contents in the biochar were selected to determine their species and content changes under different pyrolysis temperatures using the BCR extraction method. An environmental risk assessment for sludge-based biochar was also carried out using the potential ecological risk index (PERI) and risk assessment code (RAC). The results showed that the volatility of the four metals is ranked as follows: Zn>Mn>Fe>Ni. The distribution and transformation of the four metal species were different, but their migration paths shared similar characteristics. In the pyrolysis stage at low temperatures (<500℃), unstable fractions gradually changed into more stable species; under high temperatures (>500℃), some of the oxidizable and residual fractions were broken, which transformed into reducible fractions, and other fractions escaped into the atmosphere. In the environmental risk assessment, biochar prepared under high pyrolysis temperatures (>500℃) showed lower environmental risks, with the best outcomes at 500℃.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Risk assessment Controlled terms:Atmospheric temperature - Extraction - Heavy metals - Pyrolysis Uncontrolled terms:Environmental risk assessment - Environmental risks - Extraction method - Municipal sludge - Potential ecological risk - Pyrolysis temperature - Residual fraction - Risk assessment code Classification code:443.1 Atmospheric Properties - 531 Metallurgy and Metallography - 802.2 Chemical Reactions - 802.3 Chemical Operations - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202009078 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779761 Title:Source Analysis and Health Risk Assessment of Heavy Metals in Groundwater of Leizhou Peninsula Title of translation:雷州半岛地下水重金属来源解析及健康风险评价 Authors:Shi, Huan-Huan (1); Pan, Yu-Jie (1); Zeng, Min (2); Huang, Chang-Sheng (2); Hou, Qing-Qin (1); Pi, Peng-Cheng (1); Peng, Hong-Xia (1) Author affiliation:(1) School of Geography and Information Engineering, China University of Geosciences, Wuhan; 430074, China; (2) Wuhan Center of China Geological Survey, Wuhan; 430205, China Corresponding author:Peng, Hong-Xia(penghx@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4246-4256 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Source identification and health risk assessment of heavy metals in groundwater is one of the key issues in China's new era of environmental management. In order to reveal the status, sources, and health risk of pollutants in groundwater of the Leizhou Peninsula, 44 groundwater samples were collected, and the concentrations and spatial distribution of Cr, Mn, Cu, Zn, As, Cd, Hg, and Pb were measured and analyzed. The sources of heavy metals in groundwater were then determined through correlation coefficient and principal component analysis. Finally, the health risk model was used to evaluate the different health risks associated with these heavy metals. The results showed that the average value of heavy metal elements in groundwater of the Leizhou Peninsula does not inferior to the class Ⅱ water quality standard(GB/T 14848-2017). However, As, Mn, and Cd do not meet the standard. The overall spatial distribution indicated obvious spatial differences, with higher values in the south than in the north. Heavy metal sources can be identified as three principal components (PCs). PC1 (Cu, Zn, Cd, and Pb) metals mainly originate from industrial, agricultural, and traffic sources. PC2 (Cr, Mn, and As) sources can be both natural and man-made, and PC3 (Hg) sources are primarily man-made. For the groundwater of the Leizhou Peninsula, the health risks of 8 metals are with the acceptable range, the carcinogenic risk of adults is higher than that of children, and the risk of drinking exposure is higher than that of skin exposure. The study shows that the environmental protection department should encourage the rational exploitation of groundwater resources and control the sources of pollution to reduce health risks.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Risk assessment Controlled terms:Agricultural robots - Cadmium compounds - Chromium compounds - Copper compounds - Environmental management - Groundwater - Groundwater pollution - Groundwater resources - Health - Health risks - Heavy metals - Lead compounds - Manganese compounds - Mercury compounds - Pollution control - Spatial distribution - Water quality - Zinc compounds Uncontrolled terms:Carcinogenic risk - Correlation coefficient - Environmental protection departments - Heavy metal elements - Principal Components - Source identification - Spatial differences - Water quality standard Classification code:444.2 Groundwater - 445.2 Water Analysis - 454.1 Environmental Engineering, General - 461.6 Medicine and Pharmacology - 461.7 Health Care - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics DOI:10.13227/j.hjkx.202101147 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110403654 Title:Effects of Sediment Microenvironment on Sedimentary Phosphorus Release Under Capping Title of translation:覆盖条件下底泥微环境对内源磷释放的影响 Authors:Chen, Shu-Tong (1); Li, Da-Peng (1); Xu, Chu-Tian (1); Zhang, Shuai (1); Ding, Yu-Qin (1); Sun, Pei-Rong (1); Huang, Yong (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Li, Da-Peng(ustsldp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2848-2855 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The sediment microenvironment has an important effect on the release of endogenous phosphorus. In this study, the influence of two different in-situ covering materials on the sediment microenvironment were compared, and the controlling effect of endogenous phosphorus release were studied. The sediment microenvironment was represented by the concentration of NH4+-N, Fe2+ in interstitial water, and microbial activity. The results showed that the concentrations of NH4+-N and Fe2+ were lower under ACPM coverage than those of the PhoslockⓇ group, and the microbial activity was higher, indicating that the redox potential of ACPM coverage was higher than that of PhoslockⓇ. Furthermore, the bottom sediment microenvironment was in an aerobic state. Compared with the PhoslockⓇ group, the DIP concentrations in both the overcover water and porewater in the ACPM group were higher, indicating that PhoslockⓇ was superior to ACPM with respect to the phosphate adsorption capacity, suggesting that the sediment microenvironment was not the only criterion for phosphorus adsorption. In the fixation process of endogenous phosphorus, both of the covering materials were conducive to the fixation of inter phosphorus, and Ca-P increased significantly. On the other hand, oxidizing ACPM led to an increase in NH4Cl-P and a significant decrease in Fe/Al-P. This promotes the release of active phosphorus, which is conducive to the cleaning of the sediment and phosphorus release.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Phosphorus Controlled terms:Aluminum compounds - Calcium compounds - Chlorine compounds - Iron compounds - Redox reactions - Sediments Uncontrolled terms:Covering material - Fixation process - Interstitial water - Microbial activities - Microenvironments - Phosphate adsorption capacity - Phosphorus adsorption - Phosphorus release Classification code:483 Soil Mechanics and Foundations - 802.2 Chemical Reactions - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202009174 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582374 Title:Response of Riverine Nitrogen Exports to Land Use Pattern and Hydrological Regime in the Jiulong River Watershed Title of translation:九龙江流域河流氮输出对土地利用模式和水文状况的响应 Authors:Huang, Ya-Ling (1, 2); Huang, Jin-Liang (1) Author affiliation:(1) Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen; 361102, China; (2) Institute of Oceanography, Minjiang University, Fuzhou; 350108, China Corresponding author:Huang, Jin-Liang(jlhuang@xmu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3156-3165 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Watershed land use patterns combined with hydrological regimes affect riverine nitrogen (N) sources, transformation pathways, and exports, which can affect watershed health and freshwater ecosystem service supply. Understanding how land use and hydrological regimes affect riverine N exports is therefore useful for developing sustainable watershed management strategies. Based on in-situ observations during the period 2010-2017, watershed modeling, geospatial technology, and statistical analysis were coupled in this study to explore the responses of riverine nitrogen exports to watershed land use pattern and hydrological regime in a medium-sized watershed. Results showed that nitrate was the major form of dissolved inorganic N in the Jiulong River watershed; agricultural and urban watersheds had higher N exports and greater temporal variability than those in natural watershed. The seasonal fluctuation for watershed N concentrations and exports was obvious in wet years compared with dry years. Compared with the hydrological regime, the land use pattern had significant effects on N concentrations and exports. This study demonstrated that spatiotemporal variations of riverine nitrogen exports were mainly contributed by the coupled effects of watershed land use pattern and hydrological regime.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Land use Controlled terms:Agricultural robots - Ecosystems - Nitrogen - Soil conservation - Water conservation - Water management - Watersheds Uncontrolled terms:Freshwater ecosystem - Geospatial technology - In-situ observations - Seasonal fluctuations - Spatio-temporal variation - Sustainable watershed management - Temporal variability - Transformation pathways Classification code:403 Urban and Regional Planning and Development - 444 Water Resources - 444.1 Surface Water - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202011126 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582279 Title:Pollution Characteristics of Organophosphate Esters in Frozen Soil on the Eastern Edge of Qinghai-Tibet Plateau Title of translation:青藏高原东缘冻土中有机磷酸酯的污染特征 Authors:Liu, Li-Ya (1); Yin, Hong-Ling (1); Jian, Lin-Jie (1); Xu, Zi-Wen (1); Xiong, Yuan-Ming (1); Luo, Yi (1); Liu, Xiao-Wen (1); Xu, Wei-Xin (1) Author affiliation:(1) College of Resources and Environment, Chengdu University of Information Technology, Chengdu; 610225, China Corresponding author:Yin, Hong-Ling(yhl@cuit.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3549-3554 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, soil samples were collected from the eastern edge of the Qinghai Tibet Plateau in December 2019. The level and distribution characteristics of organophosphate esters (OPEs) in seasonal frozen soil were analyzed, and their sources were discussed. The results showed that the target analytes including tri-n-butyl phosphate (TnBP), tris(2-ethylhexyl) phosphate (TEHP), tributoxyethyl phosphate (TBEP), triphenyl phosphate (TPhP), tri(2-chloroethyl) phosphate (TCEP), trichloropropyl phosphate (TCPP), and tris-(2,3-dichloropropyl) phosphate (TDCPP) were detected with 100% frequency. Levels of ∑7OPEs in topsoil (0-10 cm) and sub topsoil (10-20 cm) were 146.7-348.7 ng•g-1 (mean: 231.1 ng•g-1) and 206.5-333.2 ng•g-1 (mean: 260.2 ng•g-1), respectively. The ∑7OPEs content level is comparable to that of urban soil,which is worthy of attention. TBEP and TDCPP were the most abundant compounds in the plateau soil. Point source emissions have significant influence on the spatial distribution of OPEs, and regional deposition of OPEs contributes to all sampling sites. The migration ability of different OPE compounds in soil was different. Stronger migration ability was observed for aromatic OPEs (TPhP) than chlorinated OPEs. Principal component analysis showed that the main sources of OPEs in plateau soil were atmospheric wet and dry deposition, manufactured consumer materials, and the release of OPEs from automobile interior decoration.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Esters Controlled terms:Automobile manufacture - Deposition - Frozen soils Uncontrolled terms:Automobile interior - Distribution characteristics - Organophosphate esters - Point source emissions - Qinghai Tibet plateau - Tri-n-butyl phosphate - Triphenyl phosphate - Tris(2-ethylhexyl)phosphate Classification code:483.1 Soils and Soil Mechanics - 662.1 Automobiles - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Percentage 1.00e+02%, Size 0.00e+00m to 1.00e-01m, Size 1.00e-01m to 2.00e-01m DOI:10.13227/j.hjkx.202011196 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404933 Title:Effects of Two PPCPs on Nitrification in Sediments in the Yarlung Zangbo River Title of translation:两种PPCPs对雅鲁藏布江沉积物硝化作用的影响 Authors:Ling, Xin (1); Xu, Hui-Ping (1); Lu, Guang-Hua (1) Author affiliation:(1) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing; 210098, China Corresponding author:Lu, Guang-Hua(ghlu@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2868-2874 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To understand the effects of pharmaceuticals and personal care products (PPCPs) on nitrogen transformation in high-altitude rivers, we investigated the influence of the single and combined exposure of sulfamethoxazole (SMX) and 2-ethylhexyl-4-methoxycinnamate (EHMC) at different concentrations (0.01, 0.1, 1.0, 10, and 100 μg•L-1) on nitrification in the sediments of the Yarlung Zangbo River in sediment slurry experiments. All treatments significantly reduced nitrification rates, and the maximum inhibition rates induced by SMX and EHMC (alone and in combination) were 47%, 50%, and 66%, respectively. SMX significantly inhibited ammonia monooxygenase (AMO) activity in a concentration-dependent manner, with the inhibition rates ranging from 51% to 78%. The inhibitory effect of SMX combined with EHMC on AMO activity was similar to or stronger than that of SMX alone, and the inhibition rates ranged from 55% to 84%. All EHMC exposures also significantly inhibited AMO activity, but the inhibition rates decreased with an increase in EHMC concentrations. The amoA gene abundance was significantly reduced in all the treatments, and SMX alone and in combination with EHMC induced stronger inhibitory effects than EHMC alone. SMX alone and in combination with EHMC significantly inhibited HAO activity, showing a similar concentration-effect relationship, but their combined exposure produced a stronger effect. SMX alone and in combination with EHMC also significantly decreased hao gene abundance in the sediments, and the maximum inhibition rates were 76% and 68%, respectively. Although exposure to higher concentrations of EHMC increased hao gene abundance and HAO activity, the notable decrease in nitrification rates in the sediments suggested that oxidation of ammonia to hydroxylamine catalyzed by AMO was the rate-limiting step in the nitrification process. The results also showed that PPCPs influence the activities of nitrifying communities in the sediments of high-altitude rivers and inhibit nitrification, and their coexistence further increases the pressure of nitrogen loading in aquatic ecosystems.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Nitrification Controlled terms:Amines - Ammonia - Aquatic ecosystems - Aquatic organisms - Genes - Nitrogen - Rivers - Sediments Uncontrolled terms:Ammonia monooxygenase - Concentration effects - Concentration-dependent manners - Nitrification process - Nitrification rates - Nitrogen transformations - Pharmaceuticals and personal care products - Sulfamethoxazole (SMX) Classification code:454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 471 Marine Science and Oceanography - 483 Soil Mechanics and Foundations - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 4.70e+01%, Percentage 5.00e+01%, Percentage 5.10e+01% to 7.80e+01%, Percentage 5.50e+01% to 8.40e+01%, Percentage 6.60e+01%, Percentage 6.80e+01%, Percentage 7.60e+01% DOI:10.13227/j.hjkx.202011199 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779885 Title:Pollution Characteristics and Source Analysis of Atmospheric VOCs in the Coastal Background of the Pearl River Delta Title of translation:珠江三角洲海岸背景区大气VOCs污染特征与来源 Authors:Yun, Long (1); Li, Cheng-Liu (2); Zhang, Ming-Di (1); He, Long (1); Guo, Jian-Feng (1) Author affiliation:(1) Shenzhen Environment Monitoring Center, Shenzhen; 518049, China; (2) Guangzhou OnePoint Environmental Consultant Co., Ltd., Guangzhou; 510220, China Corresponding author:Li, Cheng-Liu(willow@szopec.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4191-4201 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As an important precursor of ozone, volatile organic compounds (VOCs) have attracted much attention. This study analyzed the temporal variation and composition of atmospheric VOCs in the coastal background of the Pearl River Delta, using real-time online monitoring data of VOCs obtained at the Yangmeikeng Ecological Environment Monitoring Station from August 2019 to July 2020. The major sources of VOCs were identified using a receptor model based on the PMF (positive matrix factorization) and HYSPLIT (hybrid single particle Lagrangian integrated trajectory) models. The results showed that the annual mean concentration of anthropogenic VOCs in the coastal background area of the Pearl River Delta was 9.30×10-9(volume fraction). There was obvious seasonal variation of VOCs in this area, with higher values in autumn and winter and lower values in summer. The coastal background area of the Pearl River Delta exhibited a different diurnal variation pattern to that of cities and other backgrounds. While the peak of VOCs concentration mainly occurred in the morning, from 10: 00 to 11: 00, concentration remained at a low level during the early morning and after 15: 00. Ethylene, propylene, toluene, isopentane, isoprene, m/p-xylene, n-butane, and acetylene were the key species that affected the chemical composition of VOCs. The air masses affecting the coastal background area of the Pearl River Delta were mainly short-distance air masses from elsewhere in the province (25%), ocean air masses (27%), coastal air masses (31%), and inland air masses outside the province (17%). Among them, the average concentration of VOCs was lowest under the influence of ocean air masses, which is mainly affected by the mixed source of ship emissions and aging VOCs, gasoline volatilization, and vehicle emissions. In comparison, the concentration level of VOCs increased by 70.1% to 148.8% under the influence of other air masses. The transmission effects of industrial sources, LNG and LPG volatiles, and petrochemical sources were more prominent. Generally, the atmosphere of coastal background areas was severely affected by anthropogenic pollution, especially by air pollution masses transported from the land, while the impact of pollution by ships near shore and tourist traffic cannot be ignored.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:River pollution Controlled terms:Air pollution - Atmospheric chemistry - Ethylene - Factorization - Gems - Liquefied petroleum gas - Rivers - Ships - Volatile organic compounds Uncontrolled terms:Anthropogenic pollution - Average concentration - Chemical compositions - Concentration levels - Ecological environments - Positive Matrix Factorization - Seasonal variation - Temporal variation Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 453 Water Pollution - 482.2.1 Gems - 523 Liquid Fuels - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.70e+01%, Percentage 2.50e+01%, Percentage 2.70e+01%, Percentage 3.10e+01%, Percentage 7.01e+01% to 1.49e+02% DOI:10.13227/j.hjkx.202101155 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779628 Title:Simulation Analysis of the Impact of COVID-19 Pandemic Control on Air Quality in Henan Province based on Machine Learning Algorithm Title of translation:基于机器学习算法的新冠疫情管控对河南省空气质量影响的模拟分析 Authors:Wei, Yu (1, 2); Xu, Qi-Xiang (2, 3); Zhao, Jin-Shuai (1, 2); Zhang, Rui-Qin (2, 3) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Research Institute of Environmental Science, Zhengzhou University, Zhengzhou; 450001, China; (3) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Xu, Qi-Xiang(xuqixiang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4126-4139 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To reduce the risks of COVID-19 on society and the health of the general public, necessary prevention and control measures were implemented throughout China in 2020. Consequently, air quality was greatly improved due to lower emissions. However, the improvement of air quality could also be closely related to meteorological conditions. During quarantine (January 27 to February, 2020), reductions were observed in the concentration of all air pollutants in Henan Province (PM2.5, PM10, SO2, CO, and NO2 decreased by 36.89%, 34.18%, 19.43%, 29.85%, and 58.51%, respectively) relative to measurements taken from January 1 to 26, 2020. The only exception was for the concentration of O3, which increased by 69.64%. This study evaluates the importance of meteorological conditions in air pollution, through simulation with a long-and-short-term memory network (LSTM) and a machine learning algorithm. Results show that meteorological conditions play a crucial role in air pollutant formation. Given favorable meteorological factors, the concentrations of pollutants could be reduced by 15%-30%, while the reduction due to anthropogenic emission control ranges from 6%-40%. During the epidemic, meteorological conditions and human emissions accounted for 34.84% and 34.81% of the increase in O3 concentration, respectively. The results show that primary pollutant concentrations are more sensitive to the intensity of anthropogenic emissions. However, secondary pollutants are more dependent on meteorological factors. Furthermore, a nonlinear relationship has been identified between O3 concentration and to emission intensity. Further investigation into the causes of the rise in O3 concentration is necessary to gain a greater understanding and better control of particulate matter and O3 pollution.
© 2021, Science Press. All right reserved. Number of references:41 Main heading:Learning algorithms Controlled terms:Air quality - Emission control - Health risks - Long short-term memory - Machine learning - Public risks - Quality control - Risk assessment - Sulfur dioxide - Turing machines Uncontrolled terms:Anthropogenic emissions - Long and short term memory - Meteorological condition - Meteorological factors - Non-linear relationships - Particulate Matter - Prevention and controls - Simulation analysis Classification code:451.2 Air Pollution Control - 461.7 Health Care - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.50e+01% to 3.00e+01%, Percentage 1.94e+01%, Percentage 2.99e+01%, Percentage 3.42e+01%, Percentage 3.48e+01%, Percentage 3.69e+01%, Percentage 5.85e+01%, Percentage 6.00e+00% to 4.00e+01%, Percentage 6.96e+01% DOI:10.13227/j.hjkx.202012288 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779712 Title:Gaseous Nitrogen Emission from Soil After Application of NH4+-N Loaded Biochar Title of translation:负载NH4+-N生物炭对土壤N2O-N排放和NH3-N挥发的影响 Authors:Ma, Xiao-Gang (1, 2); He, Jian-Qiao (3); Chen, Yu-Lan (4); Li, De-Tian (5); Liu, Yi (6); Dong, Jian-Xin (1); Zheng, Xue-Bo (1) Author affiliation:(1) Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao; 266101, China; (2) Graduate School of Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (3) Nanjing Farmland Quality Protection Station, Nanjing; 210036, China; (4) Tobacco Company of Liangshan, Xichang; 615000, China; (5) Key Laboratory of Agro-Environment in Downstream and Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing; 210014, China; (6) Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu; 610041, China Corresponding author:Zheng, Xue-Bo(zhengxuebo@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4548-4557 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To safely and effectively transfer NH4+-N from eutrophic water to soil, biochar was applied to adsorb NH4+-N from wastewater, and this NH4+-N loaded biochar (N-BC) was subsequently used as a soil amendment. Understanding the influence of N-BC on N2O-N emission and NH3-N volatilization is important for both decreasing the application of chemical fertilizers and reducing gaseous nitrogen loss from soil. In this study, experiments were conducted in soil columns with four treatments, namely CK (no fertilizer), NPK (chemical fertilizer), N-BC+PK (NH4+-N loaded biochar+chemical fertilizer), and BC+NPK (biochar+chemical fertilizer). Compared to both the NPK and BC+NPK treatments, N-BC+PK significantly reduced the cumulative N2O-N emissions and NH3-N volatilization, as well as the total gaseous nitrogen loss from the soil (P< 0.05). Relative to NPK and BC+NPK, cumulative N2O-N emissions decreased by 33.62% and 24.64%, cumulative NH3-N volatilization decreased 70.64% and 79.29%, and the cumulative total gaseous nitrogen loss decreased by 64.97% and 73.75%. In particular, BC+NPK significantly enhanced the cumulative NH3-N volatilization. Furthermore, the N2O-N emission flux and NH3-N volatilization rate were significantly positively correlated with the NH4+-N concentration, NO3--N concentration, and pH of soil (P< 0.01). Overall, using NH4+-N loaded biochar can significantly decrease N2O-N emissions and NH3-N volatilization, relative to the traditional application combining biochar and chemical fertilizer. This research provides solid theoretical support and data for the application of NH4+-N loaded biochar in soil, to reduce gaseous nitrogen loss.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Soil pollution Controlled terms:Ammonia - Nitrogen fertilizers - Soils Uncontrolled terms:Bio chars - Chemical fertilizers - Emission fluxes - Eutrophic water - Gaseous nitrogen - Soil amendment - Soil column Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.46e+01%, Percentage 3.36e+01%, Percentage 6.50e+01%, Percentage 7.06e+01%, Percentage 7.38e+01%, Percentage 7.93e+01% DOI:10.13227/j.hjkx.202102116 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126244 Title:Source Apportionment of Ozone Pollution in Guangzhou: Case Study with the Application of Lagrangian Photochemical Trajectory Model Title of translation:广州市臭氧污染溯源:基于拉格朗日光化学轨迹模型的案例分析 Authors:Pei, Cheng-Lei (1, 2); Mu, Jiang-Shan (3); Zhang, Ying-Nan (3); Shen, Heng-Qing (3); Chen, Yu-Ru (4); Huang, Jie-Sheng (4); Ding, Hao-Ran (4); Li, Cheng-Liu (4) Author affiliation:(1) Guangzhou Ecological and Environmental Monitoring Center of Guangdong Province, Guangzhou; 510060, China; (2) Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Guangzhou; 510275, China; (3) Environment Research Institute, Shandong University, Qingdao; 266237, China; (4) Guangzhou OnePoint Environmental Consultant Co., Ltd., Guangzhou; 510000, China Corresponding author:Shen, Heng-Qing(hqshen@sdu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1615-1625 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A six-day ozone pollution episode in Guangzhou in early October 2018 was analyzed with the application of a Lagrangian photochemical trajectory model to trace the sources of ozone, quantify the contributions of different regions, and evaluate the effects of emission reduction measures targeted at different emission sectors and different precursors on ozone pollution. The results showed that during the ozone pollution episode, the maximum daily 8 h ozone exceeded 160 μg•m-3and the highest value reached 271 μg•m-3. The average concentrations of nitrogen oxides and volatile organic compounds (VOCs) were (77.7±42.8) μg•m-3 and (71.9±56.2) μg•m-3, respectively. Aromatics and alkenes were the dominant reactive VOCs, with contributions of 38% and 30% to •OH reactivity and 51% and 16% to ozone formation potential, respectively. The ozone pollution in Guangzhou during this episode was affected by three types of air masses, with the primary source regions of Guangzhou, Guangdong Province, and regions outside Guangdong Province. For all three air mass types, ozone production in these source region was controlled by VOCs. Sensitivity tests showed that, in the primary source regions, reducing the emissions of VOCs is more effective than reducing NOx in terms of reducing ozone concentrations. Under the condition of full emission reduction, regulating traffic emissions could substantially reduce ozone levels by 14.6%-21.0% in Guangzhou, which was a more significant reduction than regulating controlled industry (8.4%-15.3%), power plant (0.9%-6.2%) and residential (2.3%-4.7%) emissions. However, the traffic emission reduction is not as effective (induced ozone reduction<10%) when the emissions reduction ratio is lower than 90%. In addition, biogenic emissions in the Pearl River Delta also substantially contributed to the ozone levels under certain circumstances, as indicated by the ozone reduction up to 19% when biogenic emissions were shut off.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Air pollution Controlled terms:Emission control - Lagrange multipliers - Meteorology - Nitrogen oxides - Ozone - River pollution - Volatile organic compounds Uncontrolled terms:Average concentration - Different precursors - Emission reduction - Emissions reduction - Ozone concentration - Ozone formation potentials - Source apportionment - Trajectory modeling Classification code:451 Air Pollution - 451.2 Air Pollution Control - 453 Water Pollution - 804 Chemical Products Generally Numerical data indexing:Percentage 1.46e+01% to 2.10e+01%, Percentage 1.90e+01%, Percentage 2.30e+00% to 4.70e+00%, Percentage 3.80e+01%, Percentage 5.10e+01%, Percentage 8.40e+00% to 1.53e+01%, Percentage 9.00e+01%, Percentage 9.00e-01% to 6.20e+00%, Time 2.88e+04s DOI:10.13227/j.hjkx.202009058 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404560 Title:Abundance Change of Antibiotic Resistance Genes During PDWW Recycling and Correlations with Environmental Factors Title of translation:印染废水循环利用抗生素抗性基因丰度变化特性 Authors:Xu, Yao-Yao (1); Wang, Rui (1); Jin, Xin (1); Shi, Xuan (1); Wang, Yan (1); Jin, Peng-Kang (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2937-2945 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Research on the distribution of antibiotic resistance genes (ARGs) in urban sewage treatment systems is extensive, but there is still insufficient research on their abundance in industrial wastewater recycling systems. In this study, a printing and dyeing wastewater (PDWW) recycling system was constructed, and 16S rDNA and high-throughput sequencing technology was used to analyze the microbial communities and ARG abundance during the treatment process. A total of 52 ARGs in nine categories were detected, of which the relative abundance of β-lactam resistance genes was the highest. During the treatment cycle, the concentration of aromatic pollutants increased with an increase in the number of cycles, while the abundance of β-lactam resistance genes increased first, decreased, and then increased (reaching 61.85% on the 100th day). At the same time, the abundance of Firmicutes, Actinobacteria, and Cyanobacteria related ARGs decreased significantly (by 84.66%, 64.38%, and 85.15%, respectively). More than 21 kinds of ARGs were significantly affected by the enrichment by the aromatic pollutants. Among them, 6 kinds of ARGs were significantly positively correlated with changes in the concentrations of the aromatic pollutants (P<0.01), while 6 were significantly negatively correlate (P <0.01). These results show that the abundance of ARGs was affected by the microbial communities and the aromatic pollutants, which increased at first, decreased, and then increased during the PPDW recycling process. This study reveals the effects of the enrichment of aromatic contaminants and changes in microbial communities on ARGs during PPDW recycling, and provides theoretical guidance for the recycling of PDWW to reduce environmental pollution associated with ARGs.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Wastewater reclamation Controlled terms:Antibiotics - Aromatization - Genes - Industrial research - Industrial water treatment - Microorganisms - Pollution - Recycling - Sewage treatment - Wastewater treatment Uncontrolled terms:Antibiotic resistance genes - Aromatic contaminants - Environmental factors - Environmental pollutions - High-throughput sequencing - Industrial wastewaters - Printing and dyeing wastewaters - Urban sewage treatment Classification code:445.1.2 Water Treatment Techniques for Industrial Use - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461 Bioengineering and Biology - 802.2 Chemical Reactions - 901.3 Engineering Research Numerical data indexing:Percentage 6.19e+01%, Percentage 6.44e+01%, Percentage 8.47e+01%, Percentage 8.52e+01% DOI:10.13227/j.hjkx.202007226 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405013 Title:China's Reuse Water Development and Utilization Potential Based on the RDA-REM Model Title of translation:基于RDA-REM模型的我国再生水开发利用潜力 Authors:Zheng, Jin-Tao (1, 2); Ma, Tao (1, 3); Liu, Jiu-Fu (1, 3); Peng, An-Bang (1, 3); Deng, Xi-Yuan (1, 3); Zheng, Hao (1, 3) Author affiliation:(1) Nanjing Hydraulic Research Institute, Nanjing; 210029, China; (2) College of Hydrology and Water Resources, Hohai University, Nanjing; 210098, China; (3) State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing; 210098, China Corresponding author:Ma, Tao(tma@nhri.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2758-2768 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To promote the efficient utilization of China's reuse water resources and optimize the allocation of water resources, an analysis of factors influencing the development and utilization of reuse water resources was conducted. The uniqueness and competitiveness of reuse water resources were analyzed, and the driving and constraint mechanisms were revealed. A potential indicator system for the bilateral coordination of the supply and demand of reuse water was also established. Based on redundancy analysis (RDA), key indicators for the prediction of reuse water development and utilization potential were screened. On this basis, a national-scale reuse water development and utilization potential prediction model was constructed (the random effects model, REM). Given some uncertainty in the parameters of the REM model, the confidence interval ranges of the parameters at the 10%-90% quartile levels were identified. The results show that four indicators (ecological water consumption, density of water supply pipelines in built-up areas, fixed asset investment in the construction of reuse water treatment facilities, and total wastewater treatment) are closely related to the development and utilization of reuse water and, hence, are key indicators. The REM for the potential prediction has a high fitting accuracy, which can effectively reflect the fluctuations in the observed values with a maximum fitting error of -8.5%. China's reuse water development and utilization will continue to maintain rapid growth long into the future, reaching 12.9 billion m3 by 2025. This will help optimize national urban water supply structures and improve the reuse rate of regional water resources.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Water conservation Controlled terms:Economics - Forecasting - Predictive analytics - Random processes - Wastewater reclamation - Wastewater treatment - Water supply - Water treatment Uncontrolled terms:Confidence interval - Constraint mechanism - Development and utilizations - Fixed asset investments - Potential indicators - Random effects model - Redundancy analysis (RDA) - Regional water resources Classification code:444 Water Resources - 445.1 Water Treatment Techniques - 446.1 Water Supply Systems - 452.4 Industrial Wastes Treatment and Disposal - 922.1 Probability Theory - 971 Social Sciences Numerical data indexing:Percentage -8.50e+00%, Percentage 1.00e+01% to 9.00e+01% DOI:10.13227/j.hjkx.202009068 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126226 Title:Changes in Concentrations and Pollution Levels of Trace Elements of Floodplain Sediments of Poyang Lake Basin in Recent Twenty Years Title of translation:近20年来鄱阳湖流域泛滥平原沉积物微量元素含量与污染变化 Authors:Li, Kuo (1, 2, 3, 4, 5); Yang, Ke (2, 3, 4, 5); Peng, Min (1, 2, 3, 4, 5); Liu, Fei (2, 3, 4, 5); Yang, Zheng (2, 3, 4, 5); Zhao, Chuan-Dong (2, 3, 4, 5); Cheng, Hang-Xin (2, 3, 4, 5) Author affiliation:(1) School of Geosciences and Resources, China University of Geosciences (Beijing), Beijing; 100083, China; (2) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (3) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (4) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, China Geological Survey, Langfang; 065000, China; (5) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding authors:Zhao, Chuan-Dong(zhaochuandong@igge.cn); Cheng, Hang-Xin(chenghangxin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1724-1738 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Investigating the pollution conditions of trace elements in the Poyang Lake basin, identifying the pollution sources, evaluating the ecological risks play an important part in formulating the effective strategies for protecting the basin ecosystem. To understand the concentration characteristics, pollution levels, and ecological risks of twelve trace elements (Cd, Hg, Pb, As, Cu, Zn, Cr, Ni, Mn, Sb, W, and Sn) in the floodplain sediments of the five main tributaries in Poyang Lake basin in the past twenty years, we used the enrichment factor (EF) and modified pollution index (MPI) to quantify the pollution levels of the trace elements, and analyzed and discussed the pollution sources in the areas with significant pollution level changes. The results indicated that the concentrations of cadmium, zinc, manganese, tungsten and lead in the floodplain sediments of the Poyang Lake basin during the past twenty years have increased by 134%, 26%, 41%, 25%, and 8%, respectively, and mercury, arsenic, chromium, nickel, antimony, and tin have decreased by 35%, 15%, 22%, 10%, 14%, and 13%, respectively, while copper has not changed significantly. The concentrations of cadmium in the Raohe River, Ganjiang River, and Xinjiang River basins have increased by 331%, 151%, and 107%, while mercury decreased in the Fuhe River, Ganjiang River, and Xiushui River basins by 87%, 41%, and 40%, respectively. The classification results based on the EF indicated that the changes in the pollution levels of trace elements in the Poyang Lake basin were characterized by the aggravation of cadmium pollution and the degradation of mercury pollution, the pollution level of cadmium in the Ganjiang River basin was upgraded to moderate and significant, the pollution level of cadmium in the Le'an River was upgraded to very high, and the pollution level of mercury in the Fuhe River basin was reduced to unpolluted or minimal. The MPI classification results established that the increase in the cadmium pollution had intensified the comprehensive pollution in the Poyang Lake basin, causing the proportion of severely and heavily polluted sites to be raised from 17% to 33%. The MRI classification results also demonstrated that the proportion of very high ecological risk sites have increased from 11% to 22%. The element with the highest MRI contribution rate changed from mercury to cadmium, which was caused by the reduction of the ecological risk level from very high to moderate. The results demonstrated that the significant pollution changes in the trace elements in the floodplain sediments of the Poyang Lake basin were primarily caused by human activities, such as mineral exploitation, smelting, and industrial and agricultural production. Our findings can provide scientific evidence for the prevention and control of river pollution and the optimal management of a watershed ecosystem.
© 2021, Science Press. All right reserved. Number of references:84 Main heading:River pollution Controlled terms:Agricultural robots - Agriculture - Banks (bodies of water) - Cadmium - Ecosystems - Floods - Lake pollution - Lakes - Mineral industry - Pollution control - Rivers - Sediments - Trace elements - Watersheds Uncontrolled terms:Agricultural productions - Classification results - Enrichment factors - Floodplain sediments - Ganjiang river basin - Poyang Lake basins - Prevention and controls - Scientific evidence Classification code:444.1 Surface Water - 453 Water Pollution - 454.3 Ecology and Ecosystems - 483 Soil Mechanics and Foundations - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 1.00e+01%, Percentage 1.07e+02%, Percentage 1.10e+01% to 2.20e+01%, Percentage 1.30e+01%, Percentage 1.34e+02%, Percentage 1.40e+01%, Percentage 1.50e+01%, Percentage 1.51e+02%, Percentage 1.70e+01% to 3.30e+01%, Percentage 2.20e+01%, Percentage 2.50e+01%, Percentage 2.60e+01%, Percentage 3.31e+02%, Percentage 3.50e+01%, Percentage 4.00e+01%, Percentage 4.10e+01%, Percentage 8.00e+00%, Percentage 8.70e+01% DOI:10.13227/j.hjkx.202008083 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003492 Title:Response of Bacteriohopanepolyols to Hypoxic Conditions in the Surface Sediments of the Yangtze Estuary and Its Adjacent Areas Title of translation:长江口邻近海域表层沉积物中的细菌藿多醇及对低氧区的响应判别 Authors:Yin, Mei-Ling (1, 2, 3, 4); Duan, Li-Qin (1, 2, 3, 4); Song, Jin-Ming (1, 2, 3, 4); Zhang, Nai-Xing (5) Author affiliation:(1) Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao; 266071, China; (2) School of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Laboratory for Marine Ecology and Environmental Sciences, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266237, China; (4) Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao; 266071, China; (5) North China Sea Marine Forecasting Center of State Oceanic Administration, Qingdao; 266033, China Corresponding author:Duan, Li-Qin(duanliqin@qdio.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1343-1353 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Bacteriohopanepolyols (BHPs), as a novel bacterial biomarker, show clear potential for tracking organic matter sources and environmental change. To evaluate BHPs as indicators of seasonal hypoxia in the Yangtze Estuary and its adjacent areas, the composition, distribution, and source of BHPs in surface sediments were analyzed using high-performance liquid chromatography-atmospheric pressure chemical ionization-mass spectrometry (HPLC-APCI-MS). A total of 12 BHPs were detected with a normalized TOC concentration of 3.79-269 μg•g-1. The BHPs present in the surface sediments were dominated by bacteriohopanetetrol (BHT), 2-methyl-BHT, amino-BHPs, and adenosylhopane and its homologues, accounting for 40%, 22%, 12%, and 4% of the total BHPs, respectively. Each of these components and their corresponding indices show clear spatial trends. Specifically, BHT showed an "offshore increase" trend, which was mainly attributed to marine autochthonous inputs; and soil marker BHPs including adenosylhopane, which were dominated by terrestrial sources, showed an "offshore decrease" trend. The Rsoil index indicated a similar spatial pattern to the soil marker BHPs, with the relative contribution of terrestrial organic matter decreasing from 61.5% in coastal waters to 1.66% in the open ocean. This suggests that the organic matter in the coastal waters was mainly derived from terrestrial sources while marine sources were dominant in the open ocean. BHT-Ⅱ, the BHT stereoisomer, was derived from anaerobic ammonium oxidizing bacteria. High BHT-Ⅱ ratios were consistent with seasonal hypoxic zones in the Yangtze Estuary and, furthermore, these ratios were significantly negatively correlated with dissolved oxygen (DO) concentrations in the bottom waters. These observations indicate that hypoxic environments are beneficial to BHT-Ⅱ production, implying that BHT-Ⅱ can be used as an indicator of marine hypoxia.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Surficial sediments Controlled terms:Atmospheric ionization - Atmospheric pressure - Biogeochemistry - Dissolved oxygen - Estuaries - High performance liquid chromatography - Indicators (chemical) - Ionization of liquids - Mass spectrometry - Offshore oil well production - Organic compounds Uncontrolled terms:Ammonium oxidizing bacteria - Atmospheric pressure chemical ionization mass spectrometry - Bacteriohopanepolyols - Dissolved oxygen concentrations - Environmental change - Organic matter source - Relative contribution - Terrestrial organic matter Classification code:407.2 Waterways - 443.1 Atmospheric Properties - 483 Soil Mechanics and Foundations - 511.1 Oil Field Production Operations - 801 Chemistry - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds Numerical data indexing:Percentage 1.20e+01%, Percentage 1.66e+00%, Percentage 2.20e+01%, Percentage 4.00e+00%, Percentage 4.00e+01%, Percentage 6.15e+01% DOI:10.13227/j.hjkx.202007244 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688850 Title:Pollution Characteristics and Health Risk Assessment of Heavy Metals in PM2.5 Collected in Baoding Title of translation:保定地区PM2.5中重金属元素的污染特征及健康风险评价 Authors:Lei, Wen-Kai (1); Li, Xing-Ru (2); Zhang, Lan (2); Xu, Jing (3); Zhao, Wen-Ji (1); Liu, Zi-Rui (4) Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Department of Chemistry, Capital Normal University, Beijing; 100048, China; (3) Institute of Environmental Reference Materials, Environmental Development Center, Ministry of Ecology and Environment, Beijing; 100029, China; (4) Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China Corresponding author:Li, Xing-Ru(lixr@cnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:38-44 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To reveal the pollution characteristics and the health risks of the trace heavy metals in the atmospheric particles in Baoding, Hebei province, PM2.5 samples were collected using a middle volume sampler, and the mass concentrations of V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb in the samples were determined by microwave digestion-inductively coupled plasma-mass spectrometry (ICP-MS). The results showed that the PM2.5 concentration in Baoding ranged from 16.84-476.2 μg•m-3. During sampling, 65 samples were above the second-level standard of the Ambient Air Quality Standards (GB 3095-2012) by 54.2%. The most heavy metal elements showed higher levels in nighttime than during the daytime, except for except for Ni, Mn, and Co. Obvious seasonal variation was found with the trend of winter>autumn>spring>summer. The enrichment factors for Cu, Zn, Pb, and Cd were more than 1.5, indicating that those metals mainly came from anthropogenic emissions, such as traffic sources. Health risk assessment results indicated that the non-carcinogenic risk of heavy metals in PM2.5 in Baoding was small, and the carcinogenic risk resulting form As, Cr, Cd, and Co was greater for adults than for children.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Risk assessment Controlled terms:Air quality - Air quality standards - Health - Health risks - Heavy metals - Inductively coupled plasma mass spectrometry - Trace elements Uncontrolled terms:Ambient air quality standards - Anthropogenic emissions - Atmospheric particles - Heavy metal elements - Inductively coupled plasma mass spectrometries (ICPMS) - Mass concentration - Microwave digestion - PM2.5 concentration Classification code:451.2 Air Pollution Control - 461.6 Medicine and Pharmacology - 461.7 Health Care - 531 Metallurgy and Metallography - 801 Chemistry - 902.2 Codes and Standards - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 5.42e+01% DOI:10.13227/j.hjkx.202004230 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688851 Title:Influence of Antecedent Dry Days on Nitrogen Removal in Bioretention Systems Title of translation:前期干旱天数对生物滞留系统除氮性能的影响 Authors:Chen, Yao (1, 2); Li, Xin-Rui (1); Zheng, Shuang (1); Liu, Zhen (1, 2); Yu, Xue-Hua (1); Cheng, Qi-Hong (1) Author affiliation:(1) School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission, Chongqing Jiaotong University, Chongqing; 400074, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:263-273 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Bioretention systems have become an optimal technology during the construction of the sponge city, but its nitrogen removal performance can be affected by antecedent dry days (ADD). This study was designed to investigate the effects of different lengths of ADD (1,2,3, 5, 7, 12, and 22 d) on nitrogen removal performance using a series of laboratory-scale bioretention systems to form seven constant alternate drying-rewetting regimes. The influence mechanism was further investigated by analyzing the spatial distribution of nitrogen reductase activity and microbial community structure under different drying-rewetting regimes. The results showed that the ammonium removal efficiency was not significantly affected by ADD, while exhibiting high variation depending on the hydraulic permeability of the filler and plant growth conditions. The nitrate and total nitrogen removal efficiency decreased as the length of ADD increased form 7 d to 22 d. In addition, the spatial distribution of nitrate reductase (NaR), nitrite reductase (NiR), and hydroxylamine reductase (HyR) were affected by ADD to some extent. It was found that the soil moisture of submerged layer (SL) regulated the nitrogen processes. The nitrate dissimilatory reduction to ammonium (DNRA) can occur in the SL through secondary catalytic reduction by nitrogen reductases, thus affecting the removal of ammonium. The soil microbial community structure and its spatial distribution could be altered by ADD significantly, and the removal of multiple nitrogen species was partly affected. Thereinto, under shorter ADD values of 1, 2, 3, and 5 d, the dominant phylum was Firmicutes, a group of denitrifying microbes, and its dominant genus, Clostridium_sensu_stricto_1, also had the function of DNRA. The results of the study confirmed that ADD has a certain effect on the nitrogen removal capacity and nitrogen reductase activity, while resulting in spatial changes in the microbial community structure in the bioretention system under constant drying-rewetting conditions.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Nitrogen removal Controlled terms:Amines - Drying - Efficiency - Microorganisms - Nitrates - Soil moisture - Spatial distribution - Underwater soils Uncontrolled terms:Catalytic reduction - Hydraulic permeability - Influence mechanism - Microbial community structures - Reductase activity - Removal performance - Soil microbial community structure - Total nitrogen removal Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 913.1 Production Engineering - 921 Mathematics DOI:10.13227/j.hjkx.202005049 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003487 Title:Analysis of the Spatial Distribution of Heavy Metals in Soil from a Coking Plant and Its Driving Factors Title of translation:焦化场地内外土壤重金属空间分布及驱动因子差异分析 Authors:Gu, Gao-Quan (1, 2); Wan, Xiao-Ming (1, 2); Zeng, Wei-Bin (1, 2); Lei, Mei (1, 2) Author affiliation:(1) Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Wan, Xiao-Ming(wanxm.06s@igsnrr.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1081-1092 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Coking plants are typical industrial pollution sites and may release heavy metals into the environment, posing a threat to human health. Scholars have discovered that different types of heavy metals are released during different coking production processes and lead to spatial differences in heavy metals. Research on the spatial distribution and driving factors of pollutants in the soil inside and outside coking plants is important for sampling design, risk assessment, pollution prevention and control, etc.. Inverse distance weight was used to analyze the spatial distribution of As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn inside and outside of the coking plant. A geo-detector was used to find out the difference in the driving factors for the spatial distribution of heavy metals between soil from inside and outside the coking plant. The results showed that except As, Ni, and Zn, the overall background value rate of other heavy metals was above 50%, and the continuity of the spatial distribution of heavy metals in the soil was poor. The coefficient of variation (CV) exceeded 30%, representing a moderate variation. The average degree of CV inside the coking plant was Hg>Cd>As>Cu>Zn>Cr>Pb>Ni, and the external average degree of CV was Hg>Cu>Cd>As>Zn>Pb>Cr>Ni. An analysis of heavy metal content showed that the content of As, Cd, Cr, Pb, and Zn outside the coking plant was bigger than inside. According to geo-detector results, the physicochemical properties factors with a large contribution rate to the spatial distribution of heavy metals inside and outside the coking plant was the soil's total nitrogen, organic matter, and available medium-micro element content. Pollution source factors that contributed the most to the spatial distribution of heavy metals inside were the crude benzol and cold drum section, while the coke oven and quench section determined the outside spatial distribution of heavy metals. The q value of the strongest factor inside the coking plant was more than 0.5 while outside the coking plant it was less than 0.5. According to the interaction detector result, the interaction factors values of pollution sources and soil physicochemical properties to the inside spatial distribution of heavy metals was higher than outside. According to the distribution and geo-detector results, the strongest physicochemical properties driving factors that determined the inside and outside spatial distribution of heavy metals were relatively consistent. These factors were soil nutrient factors, which mainly influenced the availability of heavy metals. The differences in the production processes led to the difference between the inside and outside spatial distribution of heavy metals. The content of heavy metals outside the coking plant was higher than inside because the heavy metals came from various pollution sources. The driving forces for the distribution of heavy metals inside the plant were higher than outside and showed that the heavy metals inside of the plant were mainly from the coking plant. Heavy metal distribution inside the coking plant was mainly driven by the pollution source factor of the coking refining process and coking water, while heavy metal distribution outside the coking plant was mainly driven by the coking gas production process and other emission pollution source factors.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Spatial distribution Controlled terms:Coking properties - Copper compounds - Gas industry - Health risks - Heavy metals - Importance sampling - Mercury compounds - Metal analysis - Nickel compounds - Petroleum refining - Physicochemical properties - Risk assessment - Soil pollution - Soil pollution control - Soil surveys - Soils - Spatial variables measurement - Water pollution - Zinc Uncontrolled terms:Coefficient of variation - Gas production process - Heavy metals in soil - Industrial pollution - Interaction detectors - Inverse distance weight - Pollution prevention and controls - Soil physico-chemical properties Classification code:453 Water Pollution - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 513.1 Petroleum Refining, General - 522 Gas Fuels - 524 Solid Fuels - 531 Metallurgy and Metallography - 546.3 Zinc and Alloys - 914.1 Accidents and Accident Prevention - 921 Mathematics - 922 Statistical Methods - 943.2 Mechanical Variables Measurements Numerical data indexing:Percentage 3.00e+01%, Percentage 5.00e+01% DOI:10.13227/j.hjkx.202008218 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247524 Title:Temporal and Spatial Distribution Characteristics of Aerosol Optical Properties in Urban Agglomerations on the North Slope of the Tianshan Mountains Title of translation:天山北坡城市群气溶胶光学特性时空分布特征 Authors:Zhang, Zhe (1, 2, 3); Ding, Jian-Li (2, 3); Wang, Jin-Jie (2, 3); Chen, Xiang-Yue (2, 3); Liu, Xing-Tao (2); Osman, Atican (2) Author affiliation:(1) Geography Postdoctoral Research Station, Xinjiang University, Urumqi; 830046, China; (2) Key Laboratory of Smart City and Environment Modelling of Higher Education Institute, College of Resources and Environment Science, Xinjiang University, Urumqi; 830046, China; (3) Key Laboratory of Oasis Ecosystem, Ministry of Education, Xinjiang University, Urumqi; 830046, China Corresponding author:Ding, Jian-Li(watarid@xju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2202-2212 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to explore the temporal and spatial distribution characteristics of atmospheric aerosol optical depth (AOD) in the urban agglomeration on the northern slope of the Tianshan Mountains, the temporal and spatial distribution characteristics and trends of changes in the AOD in the study area from 2000 to 2019 were analyzed by MODIS aerosol products(MCD19-A2). For 2016-2019, when the AOD was relatively stable, the parameters such as the AOD and Ångström wavelength index (α) were analyzed using multi-band sun photometer ground-based remote sensing technology. The results showed that ① the spatial distribution of AOD in the study area was consistent with the topography, and high values were mainly distributed in the low altitude area. The spatial distribution of AOD in the four seasons showed a strong seasonal change from spring (0.15±0.03)>autumn (0.14±0.03)>summer (0.14±0.02). ② In terms of time, the annual average AOD value of the study area was 0.12 from 2000 to 2019 with an annual growth rate of 1.03%, thereby showing an overall increasing trend. The annual variation in the monthly mean value of AOD was bimodal; the first and second peaks were in May and November. The main reason for the increase in AOD was the release and transmission of dust from natural sources and heating. ③ Under the influence of dust weather, the AOD changed sharply in spring, and the size and change range of aerosol particles were larger than those in summer. The high value of AOD in the study area was mainly affected by coarse mode particles. The moisture absorption growth of fine mode particles caused a fluctuation in the AOD, but it was not the cause of the high value of AOD.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Spatial distribution Controlled terms:Agglomeration - Atmospheric aerosols - Dust - Optical properties - Remote sensing - Springs (components) - Topography Uncontrolled terms:Aerosol optical depths - Aerosol optical property - Coarse mode particles - Fine-mode particles - Ground-based remote sensing - Moisture absorption - Temporal and spatial distribution - Urban agglomerations Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 601.2 Machine Components - 741.1 Light/Optics - 802.3 Chemical Operations - 921 Mathematics - 951 Materials Science Numerical data indexing:Percentage 1.03e+00% DOI:10.13227/j.hjkx.202009083 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247588 Title:Preparation of Sulfidated Copper-Iron Bimetallic Composited Material and Its Mechanism for Chromium Removal Title of translation:硫化铁铜双金属复合材料的制备及除铬机制 Authors:Qu, Min (1, 2, 3, 4); Wang, Yuan (1, 2, 4); Chen, Hui-Xia (1, 2, 4); Wang, Xing-Run (5); Xu, Hong-Bin (1, 2, 3, 4) Author affiliation:(1) CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China; (2) National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China; (3) University of Chinese Academy of Sciences, School of Chemical Engineering, Beijing; 100049, China; (4) Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing; 100190, China; (5) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Chen, Hui-Xia(hxchen@ipe.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2370-2377 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Sulfidated copper-iron bimetallic particles (S-Fe-Cu) were prepared by sulfidation of copper-iron bimetallic particles (Fe-Cu) obtained by the replacement reaction in the liquid phase. The influencing factors of S-Fe-Cu in removing Cr(Ⅵ) in water were determined. BET, SEM-EDX, and XPS were used to analyze the superficial structure and mineralogy of S-Fe-Cu. Combined with batch experiments, the mechanisms of Cr removal were analyzed. The results showed that FeSx was successfully loaded on the surface of S-Fe-Cu, and the optimum S/Fe molar ratio and Cu/Fe mass ratio in theory were 0.056 and 0.025, respectively. Compared with Fe-Cu, the specific surface area of S-Fe-Cu increased by 2.1 times, and the Cr removal efficiency increased by 6.1 times under a pH of 5. A high Cr removal efficiency was maintained under alkaline conditions. Meanwhile, chloride ions could penetrate the passivation layer of iron-based material, which was beneficial to the direct oxidation of Fe0 to produce Fe(Ⅱ) and advance the performance of S-Fe-Cu for Cr removal. The XPS results showed that the removal mechanism of Cr(Ⅵ) in water included adsorption, reduction, and coprecipitation.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Copper metallography Controlled terms:Alkalinity - Binary alloys - Chlorine compounds - Chromium - Copper - Copper alloys - Efficiency - Iron - Iron metallography - Minerals - Molar ratio - Passivation - Substitution reactions - X ray photoelectron spectroscopy Uncontrolled terms:Alkaline conditions - Batch experiments - Bimetallic particles - Iron based materials - Passivation layer - Removal mechanism - Replacement reactions - Superficial structures Classification code:482.2 Minerals - 539.2.1 Protection Methods - 543.1 Chromium and Alloys - 544.1 Copper - 544.2 Copper Alloys - 545.1 Iron - 801.1 Chemistry, General - 802.2 Chemical Reactions - 913.1 Production Engineering DOI:10.13227/j.hjkx.202010120 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804551 Title:Heavy Metal Ion Adsorption Properties and Stability of Amine-sulfur Modified Biochar in Aqueous Solution Title of translation:胺硫改性生物炭对水溶液中不同重金属离子的吸附特性及吸附稳定性 Authors:Wang, Cun-Shi (1, 2); He, Min-Xia (3); Zhou, Feng (4); Chen, Liang (5); Zhu, Jian-Zhong (1, 2) Author affiliation:(1) College of Environment, Hohai University, Nanjing; 210098, China; (2) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China; (3) Everbright Environmental Technology (China) Co., Ltd., Nanjing; 211106, China; (4) Jiangsu Y-Zone Ecology Environment Technology Co., Ltd., Nanjing; 211800, China; (5) Water Conservancy Project Management of Qinhuai River, Jiangsu Province, Nanjing; 210001, China Corresponding author:Zhu, Jian-Zhong(zhuhhai2010@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:874-882 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A novel biochar was prepared by modification with corn straw, ethylene triamine, and carbon disulfide, and its adsorption properties and stability with respect to heavy metal ions in single and mixed systems (Pb2+, Ni2+, and Cd2+) were investigated. Characterization analysis confirmed the successful modification of an amine-sulfur double group on the surface of the biochar, which had abundant functional groups with a large specific surface area. Adsorption experiments under the single system indicated that the adsorption equilibrium time was 4 h and the optimum dosages were 1, 0.8, and 1.2 g•L-1. The adsorption met the conditions of the quasi-second-order kinetic equation. Under the ternary system, the adsorption equilibrium time was reduced to 1.5 h, the optimum dosages were 0.4, 1.6, and 0.8 g•L-1, and the adsorption sequence was Pb2+>Cd2+>Ni2+. The total amount of adsorption was 0.67 mmol•g-1, which was higher than that of single heavy metal ions, indicating that amine-sulfur modified straw biochar (BC-SN) has an improved treatment effect on polluted water under the coexistence of three heavy metal ions. The Pb2+ and Cd2+ adsorbed by the biochar was stably bound in the form of heavy metal sulfide and a chelated amino group. In contrast, the adsorption of Ni2+ was via the mixed adsorption of various functional groups. When Pb2+ and Cd2+ compete for adsorption, the binding energy is higher and adsorption stability is more reliable.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Chemicals removal (water treatment) Controlled terms:Adsorption - Adsorption isotherms - Binding energy - Ethylene - Heavy metals - Integral equations - Metal ions - Sulfur - Sulfur compounds - Water pollution Uncontrolled terms:Adsorption equilibria - Adsorption experiment - Adsorption properties - Heavy metal ion adsorptions - Large specific surface areas - Metal sulfides - Second order kinetics - Treatment effects Classification code:453 Water Pollution - 531 Metallurgy and Metallography - 531.1 Metallurgy - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 921.2 Calculus Numerical data indexing:Mass_Density 1.20e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 8.00e-01kg/m3 to 2.20e-02kg/m3, Molality 6.70e-01mol/kg to 2.20e-02mol/kg, Time 1.44e+04s, Time 5.40e+03s DOI:10.13227/j.hjkx.202006182 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003389 Title:Heavy Metal Contents of Soil and Surface Dust and Its Ecological Risk Analysis in a Multifunctional Industrial Park Title of translation:多功能区工业园土壤和地表灰尘重金属污染及生态风险差异分析 Authors:Zeng, Wei-Bin (1, 2); Gu, Gao-Quan (1, 2); Wan, Xiao-Ming (1, 2); Lei, Mei (1, 2) Author affiliation:(1) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) University of Chinese Academy of Science, Beijing; 100049, China Corresponding author:Wan, Xiao-Ming(wanxm.06s@igsnrr.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1105-1113 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A multifunctional industrial park can perform both producing and living functions. The smelting and processing of non-ferrous metals may lead to soil pollution, posing risks to human beings. In this study, an industrial park located in central Anhui Province, China, with copper (Cu) processing and mechanical components as the main industries, was selected as the study object. By collecting and testing soil and dust samples, the horizontal and vertical distribution characteristics of heavy metals in soil and dust in the park were analyzed. The ecological risk index is used to identify areas with higher risks and correlation and principal component analysis are used to disclose the potential source of heavy metals. Results showed that the contents of Cu, Zn, As, Pb, and Cd in the soil were 2.65, 1.76, 1.56, 2.14, and 3.87 times that of the background value, respectively. The heavy metal content of dust was significantly higher than that of soil, with contents of Cr, Ni, Cu, Zn, Hg, As, Pb, and Cd of 1.93, 1.05, 7.57, 4.63, 6.08, 5.39, 2.58, and 5.50 times that of the background value, respectively. Horizontally, the areas with higher ecological risks concentrated in the western part of the park, while vertically there was no significant trend with increases in soil depth. For the dust samples, areas with high ecological risks were closer to the main traffic arteries. Principal component analysis indicated that the main source of heavy metal in western soils was probably irrigation with contaminated river water. Road traffic, on the other hand, is more likely to be the main contributor to high dust heavy metal levels. This result is important for the park to control the potential health risks caused by heavy metals through zoning management according to the functions of different areas.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Soil pollution Controlled terms:Dust - Health risks - Heavy metals - Lead smelting - Metal analysis - Risk analysis - Risk assessment - River pollution - Soil testing - Soils Uncontrolled terms:Ecological risk index - Heavy metal contents - Heavy metal levels - Heavy metals in soil - Mechanical components - Potential health risks - Potential sources - Vertical distributions Classification code:451.1 Air Pollution Sources - 453 Water Pollution - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 533.2 Metal Refining - 914.1 Accidents and Accident Prevention - 922 Statistical Methods DOI:10.13227/j.hjkx.202010267 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003383 Title:VOCs Removal and Emission Monitoring of Beijing Bulk Gasoline Terminals in 2012-2019 Title of translation:2012~2019年北京市储油库VOCs去除及排放水平变化监测分析 Authors:Hua, Lan-Ying (1); Cui, Tong (1); Li, Jin-Xiang (1); Zou, Ben-Dong (1); Yang, Yan-Yan (1); Cheng, Gang (1) Author affiliation:(1) Beijing Municipal Ecological and Environmental Monitoring Center, Beijing; 100048, China Corresponding author:Li, Jin-Xiang(874917409@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1328-1332 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Bulk gasoline terminals are an important emission source of volatile organic compounds (VOCs) in cities. Beijing started to promote the installation of oil and gas recovery devices at oil storage terminals in 2006 to reduce VOCs emissions, since then VOCs emissions from the terminals have been monitored by the municipal government every year. This paper analyzes the VOCs emission characteristics of oil storage terminals in Beijing from 2012 to 2019. We found that the VOCs import concentration was 165.3 g•m-3 in 2019 and had experienced a decline-rise-decline pattern during 2012-2019. The emission concentration was 7.3 g•m-3 in 2019 and had declined continuously during the preceding eight years. The removal efficiency of VOCs of the gas recovery devices tended to be stable and ranged from 45.5% to 100%. Although the emission concentration had decreased significantly, the removal efficiency of the recovery unit at the oil storage terminals had decreased. Therefore, this paper proposed to strengthen process management, the inspection of the service life of the oil and gas recovery units, and check and maintain records. In addition, the removal efficiency index should be included in the scope of law enforcement and "double index" requirements should be implemented This paper will provide a scientific basis for the future development of atmospheric improvement measures.
© 2021, Science Press. All right reserved. Number of references:25 Main heading:Gasoline Controlled terms:Efficiency - Gas emissions - Recovery - Volatile organic compounds Uncontrolled terms:Emission characteristics - Emission concentration - Emission monitoring - Improvement measure - Municipal government - Process management - Removal efficiencies - Scientific basis Classification code:523 Liquid Fuels - 804.1 Organic Compounds - 913.1 Production Engineering Numerical data indexing:Percentage 4.55e+01% to 1.00e+02% DOI:10.13227/j.hjkx.202006244 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779863 Title:Influence of Pollutant Transport from Both Sides of the Taihang Mountains on Cross-Valley Urban Aerosols Title of translation:太行山两侧污染物传输对横谷城市气溶胶的影响分析 Authors:Wang, Yan (1); Guo, Wei (1); Yan, Shi-Ming (1); Pei, Kun-Ning (1); Li, Ming-Ming (1); Chen, Er-Ping (1) Author affiliation:(1) Shanxi Province Institute of Meteorological Sciences, Taiyuan; 030002, China Corresponding author:Yan, Shi-Ming(qksysm@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4104-4115 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on hourly concentration data of PM10 and PM2.5 from 2017 to 2019 and wind speed and direction data at the corresponding times in Yangquan, an urban valley of the Taihang Mountains, the characteristics of air transport in a cross-valley urban area and their influence on aerosols in Yangquan were analyzed using the HYSPLIT model, cluster analysis, and the potential source contribution factor and concentration weight trajectory methods. The pollutant transport characteristics on the east and west sides of the Taihang Mountains were evaluated. The diurnal variation of the aerosols showed a single peak and single valley, with continuous improvements in aerosol concentration from evening to the morning of the next day. The maximum aerosol concentration occurs at 10: 00-11: 00 in winter and at 09: 00 in other seasons, whereas the minimum value occurs at 15: 00-16: 00. The monthly mean aerosol concentration in Yangquan was highest in January and lowest in August, and PM10 was also high in March and April. The most frequent surface wind directions in Yangquan are easterly and westerly due to the topography of the cross valley. The average concentrations of aerosols were highest in the calm wind weather. Furthermore, the dust weather caused by the westerly wind in spring and autumn and the easterly transport in winter also causes an increase in aerosol concentration in Yangquan. The backward trajectories in combination with the pollution characteristics showed that 26.2% of the pollution trajectories are in spring, 36.4% are in autumn, and 33.7% are in winter, and that these are mainly distributed in the southwest and southeast of Yangquan and also in the northeast in winter. There was significant fine particle transport on both sides of the mountains, and the trajectories originating from or passing through the west side of the Taihang Mountains also transport coarse particles. As indicated by the pollution trajectory, the westerly air transport has an impact on PM10 in excess of the standard rate. The easterly transport has larger noise and mainly affects the exceedance rate of PM2.5. The main potential source areas of aerosol pollution in Yangquan differ in different seasons. The potential source areas are to the southwest and southeast of Yangquan in spring, the southwest and south of Yangquan in autumn, and the south and east of Yangquan in winter. The areas with high PSCF and CWT in PM2.5 were in the southeast region, but those for PM10 were in the southwest region. The area southeast of Shanxi and the border area north of Henan are the main source areas. Based on the influence of aerosol pollution transmission in Yangquan, the cross-valley urban area is affected simultaneously by the areas east and west of the Taihang Mountains, especially by PM2.5 transport from east to west.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Air pollution Controlled terms:Aerosols - Cluster analysis - Landforms - Springs (components) - Topography - Trajectories - Urban transportation - Wind Uncontrolled terms:Aerosol concentration - Average concentration - Backward trajectory - Continuous improvements - Fine particle transports - Pollutant transport - Potential source contribution factors - Wind speed and directions Classification code:432 Highway Transportation - 433 Railroad Transportation - 443.1 Atmospheric Properties - 451 Air Pollution - 481.1 Geology - 601.2 Machine Components - 723 Computer Software, Data Handling and Applications - 951 Materials Science Numerical data indexing:Percentage 2.62e+01%, Percentage 3.37e+01%, Percentage 3.64e+01% DOI:10.13227/j.hjkx.202102142 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582352 Title:Water Pollution Characteristics and Source Apportionment in Rapid Urbanization Region of the Lower Yangtze River: Considering the Qinhuai River Catchment Title of translation:长江下游快速城市化地区水污染特征及源解析:以秦淮河流域为例 Authors:Ma, Xiao-Xue (1, 2); Gong, Chang (3); Guo, Jia-Xun (4); Wang, La-Chun (4); Xu, Yun-Yun (4); Zhao, Chun-Fa (5) Author affiliation:(1) College of Urban Resources and Environment, Jiangsu Second Normal University, Nanjing; 210013, China; (2) Signal Processing in Earth Observation (SiPEO), Technical University of Munich (TUM), Munich; 80333, Germany; (3) Suqian Hydrological and Water Resources Management Bureau of Jiangsu Province, Suqian; 223800, China; (4) School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing; 210093, China; (5) Water Affairs Bureau of Jiangning District, Nanjing City, Nanjing; 211100, China Corresponding author:Wang, La-Chun(wang6312@263.net.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3291-3303 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Clarifying the current situation of regional water pollutants and the relationship between pollutants and pollution sources is considered essential for managing the water environment. Water quality identification index (WQI), cluster analysis (CA), positive matrix factorization (PMF), and stable isotope analysis in R (SIAR) were employed to interpret a large and complex water quality data set of the Qinhuai River catchment generated during 2015 to 2019 to monitor of 11 parameters at 29 different sampling sites. WQI analysis indicated that water quality in Qinhuai River catchment is considered to have "moderate pollution," and an improving trend of water quality was observed at the interannual scale. TN was the most deteriorated of all pollution parameters. CA and PMF results on the spatial scale revealed that sampling sites located at downtown of Nanjing and Lishui District or Jangling University town were highly polluted due to the sewage from domestic sewage and business service sewage (28.88%) as well as industrial wastewater (27.43%), while sampling sites located at Hushu Street Administrative District, Ergan River, and Sangan River were slightly polluted by rural domestic wastewater and garbage (28.79%), and agricultural non-point source pollution (24.3%). The middle-lower reaches (Jiangning Development Zone and Moling Street) and middle reaches (Lukou Street Administrative District) were moderately polluted by industrial wastewater (27.25%), sewage from domestic wastewater and business service wastewater (31.62%) as well as inner sources (24.76%). The SIAR results showed that NO3--N was the main nitrogen form, and the NO3--N mainly originated from sewage (61%) and soil (34%) in the Yuntaishan River sub-catchment. These results will aid in the development of measures required to control water pollution in river catchments.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:River pollution Controlled terms:Agricultural robots - Cluster analysis - Factorization - Quality control - Rivers - Runoff - Sewage - Water pollution control - Water quality Uncontrolled terms:Agricultural non-point source pollutions - Domestic wastewater - Industrial wastewaters - Lower yangtze rivers - Positive Matrix Factorization - Source apportionment - Stable-isotope analysis - Water quality identification index Classification code:442.1 Flood Control - 445.2 Water Analysis - 452.1 Sewage - 453 Water Pollution - 453.2 Water Pollution Control - 723 Computer Software, Data Handling and Applications - 913.3 Quality Assurance and Control - 921 Mathematics Numerical data indexing:Percentage 2.43e+01%, Percentage 2.48e+01%, Percentage 2.72e+01%, Percentage 2.74e+01%, Percentage 2.88e+01%, Percentage 2.89e+01%, Percentage 3.16e+01%, Percentage 3.40e+01%, Percentage 6.10e+01% DOI:10.13227/j.hjkx.202011184 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247485 Title:New Particle Formation Events in Summer and Winter in the Coastal Atmosphere in Qingdao, China Title of translation:青岛沿海地区夏季和冬季新粒子生成特征对比 Authors:Sun, Yue (1); Zhu, Yu-Jiao (1); Meng, He (2); Liu, Bing (1); Liu, Yu-Hong (1); Dong, Can (1); Yao, Xiao-Hong (3); Wang, Wen-Xing (1); Xue, Li-Kun (1) Author affiliation:(1) Environment Research Institute, Shandong University, Qingdao; 266237, China; (2) Qingdao Eco-environment Monitoring Center of Shandong Province, Qingdao; 266003, China; (3) Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China Corresponding authors:Zhu, Yu-Jiao(zhuyujiao@sdu.edu.cn); Xue, Li-Kun(xuelikun@sdu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2133-2142 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Atmospheric particle number size distributions were measured by a wide-range particle size spectrometer and a scanning mobility particle size spectrometer in the summertime and wintertime in the coastal area of Qingdao (China). The inorganic and organic gaseous precursors and particulate chemical composition were measured to characterize new particle formation (NPF) events by combining meteorological parameters and backward trajectories. In summer, the occurrence frequency of NPF events was 18% lower. However, the atmospheric particle number concentration increased by approximately 1-4 times during the NPF events compared with those without NPF. The apparent formation rates and growth rates were (5.2±4.3) cm-3•s-1 and (6.5±2.2) nm•h-1, respectively, except for a special NPF event on July 20. The correlation analysis results implied that biogenic volatile organic compounds (BVOCs) seemingly favor NPF, and the reverse is true for anthropogenic volatile organic compounds (AVOCs). The occurrence frequency of NPF events of 27% in winter was clearly higher than that in summer. The apparent formation rates and growth rates, i.e., (3.3±3.1) cm-3•s-1 and (5.3±3.3) nm•h-1, decreased, although the decreases were not significant (P>0.05). The correlation analyses implied that AVOCs favored NPF. However, BVOCs had no correlation with NPF. For the cases in which new particles could grow to CCN sizes (>50 nm), the particle growth characteristics showed significant seasonal differences, i.e., in summer, new particles could grow to CCN sizes via photochemical reactions, whereas in winter, second-stage growth driven by the formation of nitrate aerosols was needed to grow new particles to CCN sizes.
© 2021, Science Press. All right reserved. Number of references:47 Main heading:Particle size analysis Controlled terms:Atmospheric chemistry - Correlation methods - Particle size - Photochemical reactions - Spectrometers - Volatile organic compounds Uncontrolled terms:Atmospheric particles - Backward trajectory - Biogenic volatile organic compounds - Chemical compositions - Correlation analysis - Meteorological parameters - New particle formation - Seasonal differences Classification code:443.1 Atmospheric Properties - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.1 Organic Compounds - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Percentage 1.80e+01%, Percentage 2.70e+01% DOI:10.13227/j.hjkx.202007230 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804504 Title:Characterization, Sources, and Health Risks of PM2.5-bound PAHs During Autumn and Winter in Luoyang City Title of translation:洛阳市秋冬季PM2.5中多环芳烃的污染特征,来源解析及健康风险评价 Authors:Qi, Jing-Wen (1, 2); Zhang, Rui-Qin (2); Jiang, Nan (2); Li, Li-Ping (1, 2); Miao, Qing-Qing (1, 2) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:595-603 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, PM2.5 samples were collected synchronously at Gaoxin and Linxiao in Luoyang City during autumn and winter (4 October 2018 to 30 January 2019). Sixteen priority polycyclic aromatic hydrocarbons (PAHs) associated with fine particulate matter were analyzed by gas chromatography mass spectrometry (GC-MS). The concentrations and composition characteristics of the PAHs on clean and polluted days were studied. Diagnostic ratio analysis and principal component analysis (PCA) were used to identify the emission sources of PM2.5-bound PAHs and the equivalent carcinogenic concentration of benzo[a]pyrene (BaP) and incremental lifetime cancer risks (ILCRs) model were applied to evaluate health risks. During the sampling period, the concentrations of PAHs at Gaoxin and Linxiao ranged 24.33-90.26 ng•m-3 and 23.81-76.99 ng•m-3, respectively. With the increase in PM2.5 pollution, PAH concentrations increase significantly (the mean PAH concentration on polluted days was approximately 1.3 times higher than during clean days). PAH profiles at different polluting levels were similar; 4-ring PAHs (43%-48%)>5-6 ring PAHs (32%-35%)>2-3-ring PAHs (20%-22%). Diagnostic ratios and PCA demonstrated that PAHs in the study area were mainly derived from combustion sources including coal combustion, biomass burning, and motor vehicle emissions. The coal combustion was the main pollution source in the study area (clean days=49.28%-56.38%, polluted days=49.44%-60.60%). The results of the equivalent carcinogenic concentration of benzo[a]pyrene (BaP) and ILCR model revealed that the human health risk on polluted days was higher. Moreover, the cancer risks from adult exposure to PAHs were higher than those child exposure, which has an acceptable level of risk (<10-6).
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Coal combustion Controlled terms:Barium compounds - Diseases - Gas chromatography - Health risks - Mass spectrometry - Pollution - Pyrene - Risk assessment Uncontrolled terms:Combustion sources - Composition characteristics - Fine particulate matter - Gas chromatography-mass spectrometries (GC-MS) - Human health risks - Motor vehicle emissions - Pollution sources - Polycyclic aromatic hydrocarbons (PAHS) Classification code:461.7 Health Care - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.00e+01% to 2.20e+01%, Percentage 3.20e+01% to 3.50e+01%, Percentage 4.30e+01% to 4.80e+01% DOI:10.13227/j.hjkx.202006246 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003394 Title:Biological Conversion Mechanism of Sulfate Reduction Ammonium Oxidation in ANAMMOX Consortia Title of translation:ANAMMOX培养物中硫酸盐型氨氧化生物转化机制 Authors:Bi, Zhen (1, 2); Dong, Shi-Yu (1); Huang, Yong (1, 2) Author affiliation:(1) School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Huang, Yong(yhuang_sz@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1477-1487 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Sulfate reduction with ammonium oxidation (SRAO) in laboratory ANAMMOX reactors was considered as an autotrophic process mediated by ANAMMOX bacteria (AnAOB), in which ammonium, as an electron donor, was oxidized by the electron acceptor sulfate. This process was developed based on the transformations of nitrogenous and sulfurous compounds observed in natural environments. Reported results vary widely for conversion mole ratios (ammonium/sulfate) as do intermediate and final products of the sulfate reduction. Thus, hypotheses surrounding biological conversion pathways of ammonium and sulfate in ANAMMOX consortia are implausible. In this study, continuous reactor experiments and batch tests were conducted under micro-aerobic (-100 mV-1-1), anoxic (-300 mV-1-1) and anaerobic (ORP<-300 mV, DO<0.2 mg•L-1) conditions with different inoculated sludge (ANAMMOX sludge and mixed sludge) to verify the SRAO phenomena and identify possible pathways of substrate conversion. The key findings were that SRAO occurred only where SRB existed under anoxic condition, and was absent under anaerobic conditions with ANAMMOX consortia. The analysis of the microbial community and functional gene expression showed that ammonium oxidation by AAOB coupled with sequential ANAMMOX is possibly responsible for the loss of ammonium under anoxic condition. Organic substances released through microbial decay contributed to heterotrophic sulfate conversion by SRB. AnAOB do not possess the ability to oxidize ammonium with sulfate as the electron acceptor. SRAO could, in fact, involve a combination of aerobic ammonium oxidation, ANAMMOX, and heterotrophic sulfate reduction processes, which are mediated via AOB, AnAOB, and SRB.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Wastewater treatment Controlled terms:Anoxic water - Decay (organic) - Gene expression - Nitrogen removal - Oxidation - Sulfur compounds Uncontrolled terms:Aerobic ammonium oxidation - Ammonium oxidation - Anaerobic conditions - Biological conversion - Continuous reactors - Microbial communities - Natural environments - Substrate conversion Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 802.2 Chemical Reactions DOI:10.13227/j.hjkx.202008105 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126220 Title:Soil Fungal Community Structure and Functional Diversity in a Copper Tailing Dam and Its Surrounding Areas Title of translation:铜尾矿坝及其周边土壤真菌群落结构与功能多样性 Authors:Chen, Jian-Wen (1); Zhang, Hong (2); Li, Jun-Jian (1); Liu, Yong (1) Author affiliation:(1) Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China; (2) School of Environment and Resources, Shanxi University, Taiyuan; 030006, China Corresponding author:Zhang, Hong(zhanghong@sxu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2056-2065 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil fungal communities are reconstructed under heavy metal stress. This study was conducted to explore the structural and functional diversity of soil fungal communities under different land-use patterns, namely grassland and farmland, in 15-year-old or 10-year-old poplar plantations (Populus deltoides cv. 'zhonghuahongye') near the Shibahe copper tailing dam and the surrounding area, located in Yuanqu County, Shanxi. The results indicated that the abundance and diversity of fungal communities were the highest in the 15-year-old poplar plantation and lowest in the grassland on the tailing dam. The dominant fungal groups in the study area were Ascomycota, Basidiomycota, and Mortierellomycota. The Ascomycota members were the most abundant at all four sampling sites, reaching 92.92% of the fungal community in the grassland on the tailing dam. The highest functional diversity of carbon utilization was found in the soil fungal communities of the 15-year-old poplar plantations; moreover, the diversity in the grassland on the tailing dam was significantly higher than that in the farmland and in the 10-year-old poplar plantation. Meanwhile, we also observed the highest glucoside carbon source utilization efficiency in the grassland. Notably, the correlation analysis revealed that Ascomycota was significantly correlated with the utilization efficiency of the glucoside carbon source in our study area. Moreover, the soil total nitrogen content, but not the soil heavy metal content, was significantly correlated with the abundance of the soil fungal community. There were significant correlations between the cadmium and arsenic contents and the soil fungal community diversity indices. Our results indicated that the soil fungal communities were more influenced by soil fertility and land use than by the soil heavy metal content. This study underlies the application of soil fungal communities in soil remediation of heavy metal-contaminated areas.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Fungi Controlled terms:Carbohydrates - Carbon - Copper - Cotton - Dams - Efficiency - Farms - Forestry - Heavy metals - Land use - Soil conservation - Soil pollution - Soils Uncontrolled terms:Carbon utilization - Contaminated areas - Correlation analysis - Functional diversity - Heavy metal stress - Soil fungal communities - Soil total nitrogen - Utilization efficiency Classification code:403 Urban and Regional Planning and Development - 441.1 Dams - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 544.1 Copper - 804 Chemical Products Generally - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 913.1 Production Engineering Numerical data indexing:Age 1.00e+01yr, Age 1.50e+01yr, Percentage 9.29e+01% DOI:10.13227/j.hjkx.202008136 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126232 Title:Effects of Different Exogenous Selenium Species Application on Growth and Cadmium Uptake of Pak Choi in Cadmium Contaminated Soil Title of translation:不同外源硒对镉污染土壤中小白菜生长及镉吸收的影响 Authors:Liu, Yang (1); Qi, Ming-Xing (1); Wang, Min (1); Liu, Na-Na (1); Kleawsampanjai, Pornpimol (1); Zhou, Fei (1); Zhai, Hui (1); Wang, Meng-Ke (1); Ren, Rui (2); Liang, Dong-Li (1, 3) Author affiliation:(1) College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) Shaanxi Hydrogeological Engneering Geology and Environment Geology Survey Center, Xi'an; 710068, China; (3) Key Laboratory of Plant Nutrition and the Agi-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China Corresponding author:Liang, Dong-Li(dlliang@nwsuaf.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:2024-2030 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study explored the discrepancy in the detoxification effects of different exogenous selenium (Se) species in cadmium (Cd)-contaminated soil to provide a scientific basis for the control of Cd pollution in the soil and the safe production of crops. A pot experiment was conducted to compare the effects of different concentrations (0, 0.5, 1.0, and 2.5 mg•kg-1) of selenite and selenate on the growth (root length, shoot height, biomass, and photosynthetic parameters), uptake, and translocation of Cd on pak choi in Cd-contaminated soil. The results indicated that the detoxification effect of a low Se concentration (≤1.0 mg•kg-1) treatment on Cd was better than that with a high Se concentration (2.5 mg•kg-1) treatment, and the selenite treatment demonstrated a greater detoxification effect on Cd than the corresponding selenate treatment. Meanwhile, the application of low-concentration selenite and selenate both increased the SPAD value, Pn, Gs, Ci, biomass, and shoot length of the pak choi, and the 1.0 mg•kg-1 selenite treatment had the most significant (P<0.05) effect (except Ci). Nevertheless, the photosynthetic parameters of the pak choi under the high-concentration Se were significantly lower than those under the low Se concentration treatment (except Tr, P<0.05). Compared with the treatment without Se (control), the uptake of Cd in the pak choi was reduced under different Se treatments. Compared with the control, the Cd concentration in the shoots of the pak choi treated with 1.0 mg•kg-1 of selenite and selenate decreased by 40.0% and 20.5% (P<0.05), respectively. In addition, the translocation of Cd from the root to the shoot was significantly reduced under the 0.5 mg•kg-1 selenate treatment, while the high-concentration treatments of either exogenous Se promoted the translocation of Cd. Overall, applying the appropriate amount of exogenous Se could promote the photosynthesis and biomass of pak choi, and reduce the accumulation of Cd in pak choi. Therefore, the 1.0 mg•kg-1 selenite treatment is recommended for the control and safe utilization of Cd in Cd-contaminated soil.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Soil pollution Controlled terms:Biomass - Cadmium - Contamination - Detoxification - Selenium - Selenium compounds - Soil pollution control - Soils Uncontrolled terms:Cadmium uptake - Cd concentrations - Cd-contaminated soils - Contaminated soils - Low concentrations - Photosynthetic parameters - Safe production - Scientific basis Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals Numerical data indexing:Percentage 4.00e+01% DOI:10.13227/j.hjkx.202009017 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804523 Title:Hydrochemical Characteristics and Origin of Groundwater in the Central Guohe River Basin Title of translation:涡河流域中部地区地下水化学特征及其成因分析 Authors:Zheng, Tao (1); Jiao, Tuan-Li (1); Hu, Bo (1); Gong, Jian-Shi (2); Hou, Xiang-Meng (1); Wang, He-Sheng (2) Author affiliation:(1) Geological Survey of Anhui Province (Anhui Institude of Geological Sciences), Hefei; 230001, China; (2) Nanjing Center, China Geological Survey, Nanjing; 210016, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:766-775 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Groundwater is an important water source in the central Guohe River basin but pollution and water quality deterioration present a significant challenge. Here, 80 groups of groundwater samples were collected between June and September 2019 including 61 groups of shallow groundwater samples, 9 groups of middle groundwater samples, and 10 groups of deep groundwater samples. The hydrochemical characteristics and formation mechanisms of groundwater at these different depths were analyzed using statiatical techniques, Piper triangular diagrams, Gibbs figures, and ion ratios. The following results were noted: ① Groundwater is weakly alkaline overall, and the dominant anion and cation at different depths were HCO3- and Na+. The shallow and deep groundwater mainly consist of fresh water while the middle groundwater is mainly brackish water. The hydrochemical typology of the shallow groundwater was mainly HCO3-Ca•Mg and HCO3-Na•Mg. HCO3•SO4•Cl-Na was found to be the dominant hydrochemical typology in the middle and deep groundwater. ② The chemical composition of the groundwater shows notable vertical variations. With depth, the mean mass concentrations of TDS, Na+, Mg2+, Cl-, SO42-, and HCO3- first increase and then decreasing, while the mean mass concentration of Ca2+ gradually decreases. These vertical differences are closely related to the sedimentary environment of the aquifer and the intensity of water-rock interaction. ③ The formation of groundwater hydrochemical characteristics is influenced by water-rock interactions, cation exchange, and human activities, with water-rock interaction dominated by sodium silicate dissolution. Human activities generally have the greatest impact on the shallow groundwater. ④ The water quality of the deep groundwater is notably better than that of the shallow and middle groundwater. However, excessive exploitation of the deep groundwater resource has led to the formation of a regional groundwater funnel, enhancing the difference in middle and deep groundwater levels. To reduce the risk of ground subsidence and the contamination of the deep water with middle brackish water, deep groundwater exploitation wells should be carefully positioned and regulated.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Groundwater resources Controlled terms:Alkalinity - Aquifers - Deterioration - Groundwater pollution - Hydrochemistry - Positive ions - River pollution - Sedimentary rocks - Silicates - Sodium compounds - Water quality - Watersheds Uncontrolled terms:Chemical compositions - Hydrochemical characteristics - Regional groundwater - Sedimentary environment - Shallow groundwater - Vertical difference - Water quality deterioration - Water rock interactions Classification code:444.1 Surface Water - 444.2 Groundwater - 445.2 Water Analysis - 453 Water Pollution - 481.2 Geochemistry - 482.2 Minerals - 801.1 Chemistry, General - 951 Materials Science DOI:10.13227/j.hjkx.202006037 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247454 Title:Characteristics of Heavy Metal Pollution and Ecological Risk Evaluation of Indoor Dust from Urban and Rural Areas in Taiyuan City During the Heating Season Title of translation:太原市城乡居民区采暖季室内灰尘中重金属的污染特征及其生态风险评价 Authors:Huang, Hao (1); Xu, Zi-Qi (2); Yan, Jun-Xia (1); Zhao, Xiu-Ge (3); Wang, Dan-Lu (3) Author affiliation:(1) Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China; (2) Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing; 100029, China; (3) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Yan, Jun-Xia(yjx422@sxu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2143-2152 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The presence of heavy metals in indoor dust is a world-wide concern owing to its negative impact on humans. In this study, we collected indoor dust samples from urban and rural residential areas during the heating season in Taiyuan City. We then identified the concentrations of 11 heavy metals (Cd, Co, Cr, Pb, Mn, Ni, Cu, Zn, V, As, and Hg) using inductively coupled plasma-mass spectrometry. Based on the concentrations, we categorized the pollution levels of indoor dust using the geo-accumulation index and the pollution load index. We further identified the sources of heavy metals using the enrichment factor and principal component analysis. Finally, we evaluated the potential ecological risks of heavy metals via the potential ecological index. The results illustrated that ① with the exception of Co, Mn, and V, the mean concentrations of Cd, Cr, Cu, Ni, Pb, As, Zn, and Hg in indoor dust were higher than the soil background values of Shanxi Province. There was a significant difference (P<0.05) in the concentrations of Co, Cr, Cu, Mn, Ni, and Hg between the urban and rural areas. ② Overall, the pollution degree of heavy metals in indoor dust was identified as moderate in the urban area of Taiyuan City, but slight in the rural area. The indoor dust sample in the urban area was not contaminated by Co, Mn, and V. However, it was slightly polluted by As, Ni, and Hg. In addition, it was close to moderately polluted by Cd, Cr, Cu, Pb, and Zn. In the rural area, the pollution degrees of all the metals, except for Hg and V, in indoor dust were lower than those in the urban area. ③ The As, Cd, Cu, Pb, Zn, and Hg in indoor dust for both urban and rural areas might have mainly originated from anthropogenic sources. The pollution sources were mainly transportation and industry in the urban area and coal combustion and indoor smoking in the rural area. The Co, Cr, Mn, Ni, and V in indoor dust in Taiyuan City might have mainly originated from natural sources. ④ The ecological risk of heavy metal pollution in indoor dust for both the urban and rural areas of Taiyuan City was relatively high, with integrated ecological risk indexes of 359.43 and 471.02 in the urban and rural areas, respectively. In addition, Cd and Hg were the largest contributors.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Rural areas Controlled terms:Air pollution - Coal combustion - Coal industry - Coal transportation - Dust - Heavy metals - Mass spectrometry - Urban transportation Uncontrolled terms:Anthropogenic sources - Ecological indices - Geo-accumulation index - Heavy metal pollution - Mean concentrations - Pollution load indices - Potential ecological risk - Urban and rural areas Classification code:432 Highway Transportation - 433 Railroad Transportation - 451 Air Pollution - 451.1 Air Pollution Sources - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 531 Metallurgy and Metallography - 801 Chemistry DOI:10.13227/j.hjkx.202008045 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405088 Title:Mechanism of S-allyl-L-cysteine Alleviating Cadmium Stress in Seedling Roots and Buds of Rice Seedlings Title of translation:S-烯丙基-L-半胱氨酸缓解水稻种子幼根和幼芽镉胁迫机制 Authors:Cheng, Liu-Long (1); Huang, Yong-Chun (1); Wang, Chang-Rong (1); Liu, Zhong-Qi (1); Huang, Yi-Zong (1); Zhang, Chang-Bo (1); Wang, Xiao-Li (1) Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China Corresponding authors:Huang, Yong-Chun(nylab@126.com); Wang, Chang-Rong(wangchangrong109@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3037-3045 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Cd has toxic effects on rice seed germination and plant growth, which may eventually lead to decreased yield and excessive Cd content in rice grains. The potential mechanism of S-allyl-L-cysteine (SAC), a natural sulfur compound derived from garlic extract, in alleviating Cd2+ stress in young roots and buds of rice seedlings was studied by a seed germination experiment. "Zhong zao 35", one of the main rice varieties in Southern China, was selected as the test material. Firstly, the alleviating effect of SAC on Cd2+ stress in rice seedling roots and buds was studied. Following this, the physiological mechanism of Cd2+ stress alleviation by SAC was examined based on the expression of the Cd transporter coding gene using real-time fluorescent quantitative PCR. The results showed that when the Cd2+ stress concentration reached 50 μmol•L-1, the young roots and buds of rice seedlings were significantly inhibited, and when the SAC concentration reached 200 μmol•L-1, Cd2+ stress was significantly alleviated. Compared to a Cd2+ stress treatment group, the total root length, surface area, and volume of young roots was increased by 173.5%, 65.52%, and 37.04%, respectively; CAT and SOD activity in young roots and buds was increased by 212.42% and 110.76%, and 31.41% and 47.31%, respectively; MDA and GSH content was decreased by 43.09% and 34.12%, and 33.97% and 35.74%, respectively; and Cd content was decreased by 35.91% and 28.86%, respectively. The results of quantitative real-time PCR showed that the relative expression levels of OsNramp5 and OsHMA2 were significantly reduced by 33.38% and 34.99% compared with the Cd2+ stress group, respectively. However, the relative expression level of OsHMA3 was significantly increased by 33.96%. From the above experimental results, the main mechanism by which SAC reduces Cd2+ stress in the young roots and buds of rice is via the regulation of Cd transporter-encoding genes, reducing Cd2+ transport to young roots and buds, and increasing transport to vacuoles.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Seed Controlled terms:Amino acids - Cadmium - Cultivation - Genes - Plants (botany) - Polymerase chain reaction - Sulfur compounds Uncontrolled terms:Expression levels - Physiological mechanisms - Potential mechanism - Quantitative real time PCR - Real-time fluorescent - Seed germination - Stress alleviation - Total root lengths Classification code:461.2 Biological Materials and Tissue Engineering - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 804.1 Organic Compounds - 821.3 Agricultural Methods - 821.4 Agricultural Products Numerical data indexing:Molar_Concentration 2.00e-01mol/m3 to 2.20e-02mol/m3, Molar_Concentration 5.00e-02mol/m3 to 2.20e-02mol/m3, Percentage 1.11e+02%, Percentage 1.74e+02%, Percentage 2.12e+02%, Percentage 2.89e+01%, Percentage 3.14e+01%, Percentage 3.34e+01%, Percentage 3.40e+01%, Percentage 3.41e+01%, Percentage 3.50e+01%, Percentage 3.57e+01%, Percentage 3.59e+01%, Percentage 3.70e+01%, Percentage 4.31e+01%, Percentage 4.73e+01%, Percentage 6.55e+01% DOI:10.13227/j.hjkx.202010061 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688836 Title:Soil Enzyme Activity in Picea schrenkiana and Its Relationship with Environmental Factors in the Tianshan Mountains, Xinjiang Title of translation:氮添加影响下新疆天山雪岭云杉林土壤酶活性及其与环境因子的相关性 Authors:Zhang, Han (1, 2); Gong, Lu (1, 2); Liu, Xu (1, 2); Shao, Kang (1, 2); Li, Xing-Zhu (1, 2); Li, Rui-Xi (1, 2) Author affiliation:(1) College of Resources and Environmental Science, Xinjiang University, Urumqi; 830046, China; (2) Key Laboratory of Oasis Ecology, Ministry of Education, Urumqi; 830046, China Corresponding author:Gong, Lu(gonglu721@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:403-410 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Nitrogen deposition may affect forest soil traits and metabolic activity. We would like to further understand the mechanisms of soil biochemical processes and habitat interactions under conditions of nitrogen deposition in forests and to investigate the characteristics of soil enzyme activities and soil environmental factors in response to nitrogen deposition in Picea schrenkiana forests in the Tianshan Mountains. In this study, nitrogen application tests were carried out using the nitrogen sedimentation gradient method on Picea schrenkiana forest soils in the Tianshan Mountains. We analyzed the characteristics of soil enzyme activity and soil environmental factors at different nitrogen application levels and discussed the correlation between soil enzyme activity and soil environmental factors in conjunction with a redundancy analysis. The study showed that: ① Soil enzyme activities showed a tendency to increase and then decrease with the increase in nitrogen application. With the exception of soil acid phosphatase, all enzyme levels reached maximums in the low nitrogen treatment. ② Exogenous nitrogen addition led to low soil pH values, and in the low or medium nitrogen treatments, soil conductivity and the content of organic carbon, ammonium nitrogen, ammonium nitrogen, and total phosphorus increases, along with the C/N ratio, while the N/P ratio showed an irregular decline. ③ Soil enzymes and their correlation with soil environmental factors showed that soil water content, organic carbon content, ammonium nitrogen content, total phosphorus content, and the C/N ratio were all significantly correlated with soil enzymes activity. Only the C/N ratio was negatively correlated with soil enzyme activity, while all other environmental factors were positively correlated with soil enzyme activity. There was no significant correlation between pH and the N/P ratio and soil enzyme activity. The important factors influencing soil enzyme activity were soil organic carbon and ammonium nitrogen with nitrogen application in Picea schrenkiana, Xinjiang.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Enzyme activity Controlled terms:Forestry - Gradient methods - Landforms - Nitrogen - Organic carbon - Phosphatases - Phosphorus - Soil moisture Uncontrolled terms:Biochemical process - Environmental factors - Nitrogen deposition - Organic carbon contents - Redundancy analysis - Soil enzyme activity - Soil enzymes activity - Soil organic carbon Classification code:461.9 Biology - 481.1 Geology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds - 921.6 Numerical Methods DOI:10.13227/j.hjkx.202004199 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582238 Title:Effects of Wheat Straw Hydrochar and Its Modified Product on Rice Yield and Ammonia Volatilization from Paddy Fields Title of translation:麦秸水热炭及其改良产物对水稻产量和稻田氨挥发排放的影响 Authors:Han, Chen (1, 2); Hou, Peng-Fu (2, 3); Xue, Li-Hong (1, 2, 3); Feng, Yan-Fang (1, 2, 3); Yu, Shan (2); Yang, Lin-Zhang (1, 2) Author affiliation:(1) College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China; (2) Key Laboratory of Agricultural Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing; 210014, China; (3) School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang; 212001, China Corresponding author:Feng, Yan-Fang(jaasfengyanfang@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3451-3457 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Hydrochar can mitigate ammonia volatilization when applied in paddy fields due to its acidity and adsorption property. To realize the recycling of agricultural biowaste as well as the control of nutrient loss from paddy fields, a simulation soil-column experiment with wheat straw hydrochar (WHC) and water-washed hydrochar (W-WHC) was conducted to evaluate the performance of rice yield and ammonia volatilization from paddy fields. The results showed that WHC and W-WHC applied in paddy fields both increased the rice yield and the increased effect at low application rate (0.5%) was higher than that at high application rate (1.5%). In comparison with the control treatment (CKU), the rice yields achieved from low application rate treatments for WHC and W-WHC increased by 17.16% and 20.20% respectively. Except for the equal emission rate between W-WHC with low application rate and CKU treatments, hydrochar (WHC, W-WHC) addition reduced the ammonia volatilization from paddy fields when compared with the CKU. Among them, the ammonia volatilization levels from low-application WHC and high-application W-WHC treatments were significantly lower than that from the CKU treatment, reduced by 31.01% and 17.40%, respectively. Based on the analysis of ammonia volatilization during different fertilization stages, the control effect of hydrochar addition on ammonia volatilization was mainly benefited from tillering and panicle fertilizer stages. The change in the nitrogen concentration of surface water at the tillering fertilizer stage and in pH at the panicle fertilizer stage with the addition of hydrochar was the main driving factor for the reduction in ammonia volatilization. The results show that sufficient amounts of hydrochar derived from wheat straw application can increase crop yield while reducing ammonia volatilization from paddy fields. This method provides an effective route for recycling agricultural biowastes.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Agricultural runoff Controlled terms:Agricultural robots - Agriculture - Ammonia - Nitrogen fertilizers - Straw - Water recycling Uncontrolled terms:Adsorption properties - Ammonia volatilization - Application rates - Control treatments - Driving factors - Modified products - Nitrogen concentrations - Soil-column experiment Classification code:804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes Numerical data indexing:Percentage 2.02e+01%, Percentage 3.10e+01%, Percentage 5.00e-01%, Percentage 1.50e+00%, Percentage 1.72e+01%, Percentage 1.74e+01% DOI:10.13227/j.hjkx.202010086 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945422 Title:Carbonized Apple Branches Decrease the Accumulation and Damage of Cadmium on Apple Rootstock by Reducing DTPA-Cd in Soil Title of translation:炭化苹果枝通过减少土壤DTPA-Cd降低苹果砧木镉积累和镉伤害 Authors:Deng, Bo (1); Xun, Mi (1); Zhang, Wei-Wei (1); Yang, Hong-Qiang (1) Author affiliation:(1) State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an; 271018, China Corresponding authors:Zhang, Wei-Wei(zhangww@sdau.edu.cn); Yang, Hong-Qiang(hqyang@sdau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4908-4915 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the effects of carbonized apple branches on cadmium(Cd)accumulation and its damage to apple rootstock, the rootstocks of apple(Malus hupehensis Rehd.)in pots containing soil together with 0.5% and 1%(ω)carbonized apple branches were irrigated by a nutrient solution containing CdSO4. The content of DTPA-Cd(cadmium extracted by diethylenetriamine pentaacetic acid)in the potting soil, and the accumulation of Cd in the roots, stems, and leaves of apple rootstocks, were subsequently monitored. The activities of antioxidant enzymes in roots and leaves, root cell death, and the net photosynthesis rate were further analyzed. The results showed that the concentration of DTPA-Cd in the potting soil with carbonized apple branches was significantly lower than that without carbonized apple branches(Cd-only). Compared with the Cd-only treatment, the concentration of DTPA-Cd in the potting soil decreased by 17.50% and 25.55% in the treatment with 0.5% and 1%(ω)carbonized apple branches for 12 days. The Cd accumulation in roots, stems, and leaves; the accumulations of superoxide anions(•O2-), hydrogen peroxide(H2O2), and malondialdehyde(MDA)in roots and leaves; and the amount of cell death in the roots of apple rootstock treated by carbonized apple branches were significantly lower compared to the Cd-only treatment. However, the activities of superoxide dismutase(SOD), peroxidase(POD), and catalase(CAT)in the roots and leaves, and the net photosynthesis rate of apple rootstock treated by carbonized apple branches, were significantly higher than under the Cd-only treatment. Compared with the Cd-only treatment, Cd accumulation in roots decreased by 29.49% and 37.18% in the treatment with 0.5% and 1%(ω)carbonized apple branches for 12 days, and the amount of cell death decreased by 22.73% and 29.09%, respectively. Our results show that carbonized apple branches reduce the uptake and accumulation of Cd in apple rootstock by reducing the content of DTPA-Cd in the soil, thereby alleviating the damaging effect of Cd on cells and photosynthesis. Moreover, the use of 1%(ω)carbonized apple branches was more effective than 0.5%(ω).
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Fruits Controlled terms:Cadmium - Cell death - Enzymes - Photosynthesis - Plants (botany) - Soils Uncontrolled terms:Antioxidants enzymes - Apple rootstock - Cadmium extracted by diethylenetriamine pentaacetic acid - Carbonized apple branch - Diethylenetriamine penta-acetic acids - Malus hupehensis - Net photosynthesis rate - Nutrient solution - Potting soils - The accumulation of cadmium Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 741.1 Light/Optics - 802.2 Chemical Reactions - 821.4 Agricultural Products Numerical data indexing:Percentage 2.273E+01%, Percentage 2.555E+01%, Percentage 2.909E+01%, Percentage 2.949E+01%, Percentage 3.718E+01%, Percentage 5.00E-01%, Age 3.288E-02yr, Percentage 1.00E00%, Percentage 1.75E+01% DOI:10.13227/j.hjkx.202102109 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945225 Title:Similarities and Differences of Valley Winds in the Beijing Plain and Yanqing Areas and Its Impact on Pollution Title of translation:北京平原和延庆地区山谷风异同及对污染的影响 Authors:Wu, Jin (1, 2); Li, Chen (3); Ma, Zhi-Qiang (1); Sun, Zhao-Bin (4); Han, Ting-Ting (1); Qiu, Yu-Lu (1); Ma, Xiao-Hui (1); Li, Ying-Ruo (1); Zhu, Xiao-Wan (1) Author affiliation:(1) Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing; 100089, China; (2) Shangdianzi National Atmosphere Background Station, Beijing; 101507, China; (3) Beijing Meteorological Service Center, Beijing; 100089, China; (4) Institute of Urban Meteorology, China Meteorological Administration, Beijing; 100089, China Corresponding author:Li, Chen(13635435@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4660-4668 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Under certain terrain and weather conditions, mountain-valley circulation is one of the main meteorological factors affecting aerosol pollution in plain-mountain area. Based on environmental monitoring data and multi-source meteorological data for the Beijing-Tianjin-Hebei region between 2015 and 2019, the characteristics, similarities, and differences of mountain-valley winds in the Beijing Plain and Yanhuai Basin regions were compared. The results show that the mountain-valley winds recorded at the Beijing Observatory are from southwest to northeast compared to from the southeast to northeast at Yanqing station. With the aggravation of pollution levels, the mountain-valley wind intensity decreased by 17.7%-32.4%. When the wind speed at Beijing Observatory was 2-6 m•s-1, the maximum PM2.5 concentration in southeast was 83 μg•m-3, which was higher than in the southwest. When the wind speed at the Yanqing station was 2-6 m•s-1, the PM2.5 concentrations in SE-SSE area was 20-40 μg•m-3 higher than in other directions, and the concentrations in the valley winds were 10-12 μg•m-3 higher than the average value for the last five years. Taking the typical heavy pollution event on March 5-8, 2015, as an example, the influence of mountain-valley winds is mainly reflected in the high humidity and regional transmission of southeast winds during the valley wind stage. The PM2.5 concentrations at the Yanqing station increased by 100-130 μg•m-3 during the valley wind stage on March 6 and 7, 2015. The inversion temperature developed to 1 000 m during the mountain wind stage, the local dew point at the Beijing Observatory and the Yanqing station rose by approximately 18℃. The peak dew point at the Yanqing station occurring 2 hours after the Beijing Observatory, and the concentrations of PM2.5 rose slightly under high humidity conditions. Meanwhile, the thermal gradient between the 400-m-high Yanqing Station and Yudu Mountain gradually decreased, and the mountain-valley wind decreased by 8% and 6%, respectively. The weakening of local circulation may be related to the bidirectional feedback mechanism of the boundary layer and high concentrations of aerosols.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Wind Controlled terms:Boundary layers - Landforms - Meteorology - Observatories - Pollution Uncontrolled terms:Beijing plain - Bidirectional feedback - Boundary - High humidity - Mountain valleys - Mountain-valley wind - PM 2.5 - Valley winds - Wind speed - Yanqing Classification code:443.1 Atmospheric Properties - 481.1 Geology Numerical data indexing:Mass 1.00E-07kg to 1.30E-07kg, Mass 1.00E-08kg to 1.20E-08kg, Mass 2.00E-08kg to 4.00E-08kg, Mass 8.30E-08kg, Percentage 1.77E+01% to 3.24E+01%, Percentage 6.00E+00%, Percentage 8.00E+00%, Size 0.00E00m, Size 2.00E+00m to 6.00E+00m, Size 4.00E+02m, Time 7.20E+03s DOI:10.13227/j.hjkx.202103071 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945117 Title:Accumulation and Health Risk of Heavy Metals in Cereals, Vegetables, and Fruits of Intensive Plantations in Hainan Province Title of translation:海南省集约化种植园中谷物, 蔬菜和水果中重金属累积程度及健康风险 Authors:Yang, Jian-Zhou (1, 2); Wang, Zhen-Liang (1, 2); Gao, Jian-Weng (1, 2); Yan, Hui (3); Hu, Shu-Qi (1, 2); Tang, Shi-Xin (1, 2); Gong, Jing-Jing (1, 2) Author affiliation:(1) Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Key Laboratory of Geochemical Exploration, Ministry of Natural Resources, Langfang; 065000, China; (3) Changsha Mineral Resources Supervision and Inspection Center, Ministry of Land and Resources, Changsha; 410007, China Corresponding authors:Gong, Jing-Jing(gjingjing@mail.cgs.gov.cn); Gong, Jing-Jing(gjingjing@mail.cgs.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4916-4924 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The accumulation of some harmful elements in plants from intensive production systems pose a serious threat to human health. In this study, seven heavy metals(Cu, Pb, Zn, Cr, Cd, As, and Hg)and their distribution characteristics in the crops, vegetables, and fruits were analyzed alongside single factor evaluation and Nemero index analysis. Combined with dietary recommended consumption data from the Chinese Nutrition Society, the dietary exposure of heavy metals were further analyzed, and a consequent safety risk assessment was conducted. A total of 673 crop, vegetable, and fruit samples were collected from typical intensive production systems in Hainan Province. The results showed that the content of Cu, As, and Hg in the 673 plant samples was below the value of the national food standard. The exceed rates of Pb, Zn, Cr, and Cd were 2.67%, 3.71%, 2.53%, and 3.71%, respectively. The heavy metal comprehensive pollution degree of six species of plants showed the trend of leafy vegetables> tuber crops> non-leafy vegetables> legume crops> fruits> cereals. In particular, Cr in leafy vegetables showed significantly higher hazard quotients(HQ)than that in other types, and exceeded 1, suggesting a high potential health risk via the ingestion of heavy metals through leafy vegetables. The relatively lower hazard index(HI)values of tuber crops, non-leafy vegetables, legume crops, fruits, and cereals suggest that these types of plants are more suitable for intensive production systems.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Health risks Controlled terms:Chemical contamination - Crops - Fruits - Hazards - Heavy metals - Nutrition - Risk assessment - Vegetables Uncontrolled terms:Crop, vegetable, and fruit - Hainan - Hainan Province - Harmful elements - Human health - Leafy vegetables - Plantation - Production system - Tuber crops - Vegetables and fruits Classification code:461.7 Health Care - 531 Metallurgy and Metallography - 821.4 Agricultural Products - 822.3 Food Products - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.53E+00%, Percentage 2.67E+00%, Percentage 3.71E+00% DOI:10.13227/j.hjkx.202102119 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945158 Title:Characteristics of Atmospheric Particulate Matter Pollution and the Unique Wind and Underlying Surface Impact in the Twain-Hu Basin in Winter Title of translation:两湖盆地冬季区域大气颗粒物污染特征及独特的风场和下垫面影响 Authors:Zhu, Yan (1); Zhao, Tian-Liang (1); Bai, Yong-Qing (2); Xu, Jia-Ping (3); Sun, Xiao-Yun (1); Hu, Wei-Yang (1); Chang, Jia-Cheng (1); Yang, Jie (1); Zhu, Cong-Zhen (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain, China Meteorological Administration, Wuhan; 430205, China; (3) Jiangsu Climate Center, Nanjing; 210044, China Corresponding author:Zhao, Tian-Liang(tlzhao@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4669-4677 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To understand the recent characteristics of atmospheric environmental changes in the Twain-Hu(Hunan-Hubei)Basin, including the middle reaches of the Yangtze River, this paper uses near-surface PM2.5 and PM10 observational data for the Twain-Hu Basin in the winters of 2015 to 2019, combined with wind-speed, topography, the normalized difference vegetation index(NDVI), and other datasets. The results show that: ① PM2.5 pollution occurred frequently in the winters of 2015-2019 in the Twain-Hu Basin, and Xiangyang and Jingmen in the western part of the basin, experience PM2.5 pollution on an average of 62 and 61 days in winter(PM2.5> 75 μg•m-3). And the heavy pollution days in Xiangyang reached 19 more days(PM2.5> 150 μg•m-3), indicating that the Twain-Hu Basin is an air pollution center in the middle reaches of the Yangtze River Basin; ② Spatially, pollution in the Twain-Hu Basin is heavier in the northwest than in the southeast, and in the urban agglomeration, which is mainly related to the regional transport of air pollutants by the winter monsoon and the high levels of emissions from urban areas; ③ A "U-shaped" nonlinear relationship was observed between near-surface wind speeds and PM2.5 and PM10 concentrations. The inflection points of PM2.5 and PM10 concentrations were 153 and 210 μg•m-3, respectively. This implies that the accumulation of local atmospheric particulate matter in the Twain-Hu Basin dominates light/medium pollution, while the regional transport of air pollutants dominates period of severe pollution; and ④ PM2.5 and PM10 in winter were significantly negatively correlated with terrain height and the NDVI, which reflects the atmospheric environmental effects of topography and urbanization.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Topography Controlled terms:Air pollution - Particles (particulate matter) - River pollution - Urban transportation - Wind Uncontrolled terms:Air pollutants - Atmospheric particulate matter - Meteorological elements - Normalized difference vegetation index - Particulate matter pollution - PM 10 - PM 2.5 - Regional transport - Twain-hu basin - Underlying surface Classification code:432 Highway Transportation - 433 Railroad Transportation - 443.1 Atmospheric Properties - 451 Air Pollution - 453 Water Pollution - 951 Materials Science Numerical data indexing:Age 1.6714E-01yr, Age 1.6988E-01yr, Mass 1.50E-07kg, Mass 1.53E-07kg, Mass 2.10E-07kg, Mass 7.50E-08kg, Size 5.1181E+01m to 5.12826E+01m DOI:10.13227/j.hjkx.202103050 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945147 Title:Identification of Dredging Depths Based on Sediment Vertical Distribution Profiles of Total Nitrogen and Total Phosphorus and Their Adsorption-desorption Equilibria Title of translation:基于沉积物中总氮和总磷垂向分布与吸附解吸特征的白洋淀清淤深度 Authors:Zhou, Ya-Ting (1); Chen, Xing-Hong (1); Li, Li-Qing (1); Zhang, Wei-Jun (1); Zhang, Mei-Yi (2); Wang, Dong-Sheng (2); Wang, Hong-Jie (3) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Institute of Ecology and Environmental Governance, College of life Sciences, Hebei University, Baoding; 071002, China Corresponding author:Li, Li-Qing(li-liqing@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4781-4788 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A dredging demonstration project in the Baiyangdian Lake included open waters and fishing ponds to reduce the internal release of nitrogen and phosphorus from bottom sediments. The dredging depth design was determined by both the sediment vertical distribution profile of total nitrogen and phosphorus, and the sediment adsorption-desorption equilibrium method. The determined dredging depths were very similar and coincident. The dredging depth for the demonstration area of open waters in Nanliuzhuang was identified as(50±10)cm; and the dredging depths for fishing ponds were(30±10)cm in both the Nanliuzhuang and Caiputai demonstration areas. The equilibrium nitrogen(NH4+-N)and phosphorus(SRP)concentrations at zero net sorption or desorption(ENC0 and EPC0)were significantly positively correlated with both exchangeable and total nitrogen and phosphorus in the sediments. The total nitrogen and phosphorus in the sediments were also used to predict the risk of their release from the bottom sediments to the overlying water column. The sediment layers with ENC0 and EPC0 values greater than the NH4+-N and SRP in the overlying water column indicated the sediments act as a source of dissolved nitrogen and phosphorus to the overlying water column in the Nanliuzhuang and Caiputai demonstration areas. Accordingly, the sediment layers with both total nitrogen concentrations greater than 750 mg•kg-1 and total phosphorus concentrations greater than 500 mg•kg-1 should be identified as dredging layers.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Sediments Controlled terms:Demonstrations - Desorption - Dredging - Fisheries - Harvesting - Lakes - Nitrogen - Phosphorus Uncontrolled terms:Baiyangdian lakes - Demonstration project - Dredging demonstration project - Dredging depths - Equilibrium nitrogen and phosphorus concentration - Nitrogen and phosphorus - Nitrogen concentrations - Phosphorus concentration - Total nitrogen - Total phosphorus - Vertical distribution of total nitrogen and phosphorus concentration - Vertical distributions Classification code:483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 804 Chemical Products Generally - 821.3 Agricultural Methods Numerical data indexing:Mass 5.00E-04kg, Mass 7.50E-04kg DOI:10.13227/j.hjkx.202101188 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126237 Title:Optimization Method and Case Study of Air Pollution Emission Spatial Pattern Title of translation:大气污染排放格局优化方法及案例 Authors:Li, Min-Hui (1, 2, 3); Liao, Cheng-Hao (1, 2, 3); Chang, Shu-Cheng (1, 2, 3); Zhang, Yong-Bo (1, 2, 3); Yang, Liu-Lin (1, 2, 3); Zeng, Wu-Tao (1, 2, 3) Author affiliation:(1) Guangdong Provincial Academy of Environmental Science, Guangzhou; 510045, China; (2) Guangdong Provincial Regional Atmospheric Environmental Quality Research Center, Guangzhou; 510045, China; (3) Guangdong Provincial Environmental Protection Key Laboratory of Atmospheric Environment Management and Policy Simulation, Guangzhou; 510045, China Corresponding author:Liao, Cheng-Hao(liaochenghao@foxmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1679-1687 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Few of the current methods of improving air quality, including end-pipe treatment, industrial, energy and transportation structure adjustments, are from the viewpoint of the spatial pattern optimization of pollutant emissions. Therefore, based on factors such as natural environment, human health, pollutant transmission capability, and meteorological diffusion conditions, our research group used the threshold approach, natural breaks, spatial erasure, and other methods to define the layout area suitable for atmospheric pollution sources. Based on these results, the emissions pattern was optimized to achieve air quality improvement. Taking Guangdong Province as an example, we examined the application of the emissions pattern optimization of air quality improvement and atmospheric environment zoning. The results indicate that the first class area of environmental air quality accounts for 9% of total province area, the densely populated area accounts for 3%, the sensitive area of the national air quality monitor stations accounts for 15%, the pollutant accumulation area accounts for 22%, and the layout area suitable for atmospheric pollution sources primarily distributed in the west part of the province accounts for 60%. By shifting the non-thermal power industrial sources into those area, the concentration level of PM2.5 will decrease by 4% at the provincial scale and 10% at the city scale. Emissions pattern optimization has become an innovative aided support technology for the continuous improvement of air quality. In practical applications, it can be combined with energy and industrial structure adjustments, pollution control technology enhancements, and cross-regional prevention and control to formulate the most feasible air quality improvement plan.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Air pollution control Controlled terms:Air quality - Industrial emissions - Quality control Uncontrolled terms:Air quality improvement - Atmospheric environment - Continuous improvements - Energy and transportation - Industrial structure adjustments - Pollution control technology - Prevention and controls - Transmission capability Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 1.00e+01%, Percentage 1.50e+01%, Percentage 2.20e+01%, Percentage 3.00e+00%, Percentage 4.00e+00%, Percentage 6.00e+01%, Percentage 9.00e+00% DOI:10.13227/j.hjkx.202007250 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945143 Title:Correlation Analysis among Environmental Antibiotic Resistance Genes Abundance, Antibiotics Concentrations, and Heavy Metals Concentrations Based on Web of Science Searches Title of translation:环境中抗生素抗性基因丰度与抗生素和重金属含量的相关性分析: 基于Web of Science数据库检索 Authors:Miao, Sun (1); Chen, Lei (1); Zuo, Jian-E (1) Author affiliation:(1) State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China Corresponding author:Zuo, Jian-E(jiane.zuo@mail.tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4925-4932 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Antibiotics and heavy metals are both important environmental pollutants and selective stressors for antibiotic resistance. However, the impact of their environmental concentrations on antibiotic resistance levels is still unclear. In this paper, research published before 2019 reporting the abundance of antibiotic resistance genes(ARGs), antibiotics concentrations, or heavy metal concentrations were extracted from the Web of Science database, and then statistical regression was used to investigate their correlative association. The results show that antibiotic selection pressure has a statistically significant effect on the increase in the abundance of ARGs in environmental media such as surface water, sediment, and soil, even at very low antibiotic concentrations(P< 0.05). Different classes of antibiotics show different potential to select and enrich ARGs. Heavy metals and the interaction between antibiotics and heavy metals also have significant effects on ARG transmission(P< 0.05). Multivariate statistical regression models can better explain the variance of ARG abundance, with R2 values for the water phase and solid phase environmental samples of 0.482 and 0.707 respectively, which are much higher than those achieved using univariate regression models. However, additional environmental factors not included may also affect ARG abundance. The results of this work provide a basis for the evaluation and control of environmental antibiotic resistance.
© 2021, Science Press. All right reserved. Number of references:50 Main heading:Heavy metals Controlled terms:Antibiotics - Genes - Multivariant analysis - Regression analysis - Surface waters Uncontrolled terms:Antibiotic concentration - Antibiotic resistance genes - Antibiotics resistance - Correlation analysis - Environmental concentration - Environmental pollutants - Heavy metal concentration - Literature search - Resistance level - Web of Science Classification code:444.1 Surface Water - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 531 Metallurgy and Metallography - 922 Statistical Methods - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202101043 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945129 Title:Degradation 2, 2', 4, 4'-Tetrabromodiphenyl Ether by Activated Peroxymonosulfate Using Magnetic Biochar Supported α-MnO2 Title of translation:磁性生物炭负载α-MnO2活化过一硫酸盐降解2, 2', 4, 4'-四溴联苯醚 Authors:Li, Xin (1); Yin, Hua (1); Luo, Hao-Yu (1); Ouyang, Xiao-Fang (1); Liu, Hang (1); Zhu, Ming-Han (1) Author affiliation:(1) Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, College of Environment and Energy, South China University of Technology, Guangzhou; 510006, China Corresponding author:Yin, Hua(huayin@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4798-4806 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Polybrominated diphenyl ethers(PBDEs)are potentially harmful to human health and the ecological environment. It is, therefore, of great significance to develop efficient, economic, and environmentally-friendly advanced oxidation systems for their effective degradation. Here, a magnetic biochar supported manganese dioxide composite(α-MnO2/MWB)synthesized by hydrothermal methods was used as a catalyst to activate peroxymonosulfate(PMS)in the degradation of 2, 2', 4, 4'-tetrabrominated diphenyl ether(BDE-47). The prepared materials were characterized by SEM, XRD, FT-IR, and BET. The results showed that α-MnO2/MWB had the best catalytic performance, and the highest degradation efficiency reached 94% under optimal conditions(α-MnO2/MWB mass ratio=1: 2, catalyst dosage=0.05 g•L-1, PMS concentration=5 mmol•L-1, BDE-47 concentration=1 mg•L-1). The effect of initial pH on the system was not distinct, while chloride ions(Cl-)and humic acid(HA)inhibited the degradation of BDE-47. In comparison, nitrate ions(NO3-)and bicarbonate ions(HCO3-)had no notable effect on the degradation. SO4-• and •OH were the key free radicals in the degradation of BDE-47 in this system, with SO4-• being dominant. As showed by the XPS characterization of the materials before and after the reaction, a change in the valence states of Mn and Fe was the main reason for the activation of PMS. It was also revealed that α-MnO2/MWB composites maintained high catalytic performance after being reused up to four times.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Degradation Controlled terms:Catalysts - Chlorine compounds - Ethers - Free radicals - Ions - Manganese oxide - Organic pollutants Uncontrolled terms:2, 2', 4, 4'-tetrabrominated diphenyl ether(BDE-47) - Advanced Oxidation Processes - Biochar - Diphenyl ether - Human health - Magnetic biochar - Peroxymonosulfate - Polybrominated diphenylethers - ]+ catalyst - Α-MnO2 Classification code:802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Amount of substance 5.00E-03mol, Mass 1.00E-06kg, Mass 5.00E-05kg, Percentage 9.40E+01%, Size -1.1938E+00m DOI:10.13227/j.hjkx.202102183 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651085 Title:Influence of Different Soil Conditioner on the Transfer and Transformation of Cadmium and Phthalate Esters in Soil Title of translation:不同土壤调理剂对土壤镉和邻-苯二甲酸酯迁移转化影响 Authors:Wang, Can (1); Zhang, Yu-Hang (2); He, Ming-Jing (1, 3); Liu, Wen-Xin (1); Lu, Jun-Feng (1); Wei, Shi-Qiang (1, 3) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chinese People's Liberation Army Service College, Chongqing; 401311, China; (3) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400716, China Corresponding author:He, Ming-Jing(mjhe@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:4024-4036 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study examines the existing common form of soil pollution, combined organic and inorganic pollution. Cadmium (Cd) is the most important inorganic element in soil pollution. Due to the widespread use of plastic film, phthalates have become the main organic pollutants in soil. Pot experiments were conducted with purple soil from southwest China, and Chinese cabbage was used as a biological indicator. Different concentration gradients of Cd and diethylhexyl phthalate (DEHP) was used as foreign pollutants. The soil was treated with one of the six common soil conditioners, namely potassium feldspar powder, oyster shell powder, biological carbon powder (biochar), calcium, potassium carbonate, and calcium phosphate, to examine the effect of conditioners on cadmium morphology, DEHP content in contaminated soil, and cadmium and DEHP absorption in Chinese cabbage. The results showed that biochar is the optimal soil conditioner for the remediation of cadmium-phthalate composite pollution in purple soil. Subsequently, the effects of soil biochar content on cadmium pollution and phthalate ester migration were studied. Uncontaminated control soil, Cd-contaminated soil, and DEHP-contaminated soil were examined by pot experiments, and biochar treatments with mass fraction of 0%, 0.5%, 1%, 3%, and 5% added to cadmium contaminated soil were used to determine its influence on Cd morphology and DEHP content of contaminated soil.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Soil pollution Controlled terms:Cadmium - Calcium phosphate - Contamination - Esters - Feldspar - Morphology - Organic pollutants - Plasticizers - Potash - Remediation - Soil conditioners - Soils Uncontrolled terms:Biological indicators - Cd-contaminated soils - Concentration gradients - Contaminated soils - Di-ethyl-hexyl phthalate - Inorganic elements - Oyster shell powder - Potassium feldspar Classification code:454.2 Environmental Impact and Protection - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 0.00e+00%, Percentage 1.00e+00%, Percentage 3.00e+00%, Percentage 5.00e+00%, Percentage 5.00e-01% DOI:10.13227/j.hjkx.202012067 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247490 Title:Spatial Differences in Water Quality and Spatial Autocorrelation Analysis of Eutrophication in Songhua Lake Title of translation:松花湖水质空间差异及富营养化空间自相关分析 Authors:Ding, Yang (1); Zhao, Jin-Yong (1); Zhang, Jing (1); Fu, Yi-Cheng (1); Peng, Wen-Qi (1); Chen, Qu-Chang (1); Li, Yan-Yan (1) Author affiliation:(1) Department of Water Ecology and Environment, China Institute of Water Resources and Hydropower Research, Beijing; 100038, China Corresponding author:Zhao, Jin-Yong(zhaojy@iwhr.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2232-2239 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To identify the spatial differences in the water quality and eutrophication characteristics of Songhua Lake, the largest artificial lake in northeast China, analysis of variance (ANOVA) and factor analysis were used to analyze the water quality sampling and testing results in 2017 in three regions, namely the main reservoir area of the Fengman Reservoir (MRAFR), the experimental area of the Songhua River Three Lakes Protection Zone (EASRTLPZ), and the Jiaohe River backwater area (JRBA). The nutrient status of the lake was evaluated by the trophic state index method, and the spatial correlation and aggregation status of the eutrophication level in Songhua Lake were studied using spatial autocorrelation analysis. The main results were as follows: ① the ANOVA showed that, except for dissolved oxygen and chlorophyll-a (Chl-a), there were significant differences (P<0.05) in the total nitrogen (TN), total phosphorus (TP), water temperature (WT), and pH in the three areas of Songhua Lake, with the clearest difference between TN and TP. ② The factor analysis showed that the changes in the climatic condition factor (WT), nutrient salt factors (TN and TP), and algal biomass factor (Chl-a) dominated the water quality in the lake. ③ The results of the trophic state index showed that the nutrient status of Songhua Lake as a whole is mildly eutrophic, and the eutrophication levels of the three regions from strong to weak are JRBA>MRAFR>EASRTLPZ. ④ The global spatial autocorrelation showed that the eutrophication level of the lake as a whole has significant positive spatial autocorrelation owing to the influence of regional eutrophication levels. The spatial heterogeneity of the eutrophication level of Songhua Lake is low. ⑤ The results of the local spatial autocorrelation showed that the central and northern areas of JRBA are the hot spots (high/high concentration) of eutrophication in the lake (P<0.01), and the central part of EASRTLPZ is the cold spot (low/low concentration) of eutrophication in the lake (P<0.05). Therefore, when conducting water environmental management of Songhua Lake, the key areas for eutrophication control should be the JRBA and MRAFR.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Analysis of variance (ANOVA) Controlled terms:Autocorrelation - Biochemical oxygen demand - Dissolved oxygen - Environmental management - Eutrophication - Factor analysis - Lakes - Multivariant analysis - Nutrients - Quality control - Reservoirs (water) - River pollution - Spatial variables measurement - Water quality Uncontrolled terms:Climatic conditions - Eutrophication control - Spatial autocorrelation analysis - Spatial autocorrelations - Spatial correlations - Spatial differences - Spatial heterogeneity - Water quality sampling Classification code:441.2 Reservoirs - 445.2 Water Analysis - 453 Water Pollution - 454.1 Environmental Engineering, General - 913.3 Quality Assurance and Control - 921 Mathematics - 922 Statistical Methods - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements DOI:10.13227/j.hjkx.202009244 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651026 Title:Adsorption Characteristics and Mechanism of Cd and Pb in Tiered Soil Profiles from a Zinc Smelting Site Title of translation:锌冶炼地块剖面土壤对镉,铅的吸附特征及机制 Authors:Liu, Ling-Qing (1); Xiao, Xi-Yuan (1); Guo, Zhao-Hui (1); Peng, Chi (1); Jiang, Zhi-Chao (1); Yang, An-Di (1) Author affiliation:(1) School of Metallurgy and Environment, Central South University, Changsha; 410083, China Corresponding author:Xiao, Xi-Yuan(xiaoxy@csu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:4015-4023 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Vertically tiered soil profiles, comprising miscellaneous fill (S1), plain fill (S2), silty clay (S3), and completely weathered slate (S4), were collected from a zinc smelter site in Zhuzhou City, Hunan Province, and their Cd and Pb adsorption characteristics were examined. Static batch experiments were conducted with different initial Cd and Pb solution concentrations, at temperatures of 288- 308 K and pH values of 2- 6. The results showed that a pseudo first-order model could be fitted to the kinetics of Cd/Pb adsorption in these soils. The soil profiles had a large retention capacity for Cd and Pb. The Cd and Pb adsorption isotherms for these soils conformed to the Freundlich isotherm, with maximum adsorption at 298 K of 2 097- 4 504 mg•kg-1 for Cd and 4 376- 10 564 mg•kg-1 for Pb, based on the Langmuir isotherm. The adsorption capacity of Cd and Pb increased with an increase in initial pH and temperature. The Cd and Pb adsorption process were a spontaneous physical and chemical process, and the soil profiles were ranked by their Cd and Pb adsorption capacities in the following order: completely weathered slate (S4)>miscellaneous fill (S1)>silty clay (S3)>plain fill (S2). The variation in adsorption capacities resulted from the differences in physical and chemical properties of the soil, mainly Fe/Al content and cation exchange capacity. Fourier transform infrared and SEM-EDS analysis showed that the main adsorption mechanism is the exchange of Cd and Pb with Fe/Al, while -OH/C=O sites in soils were the predominant adsorption sites for Cd and Pb. In the study area, exogenous Cd and Pb discharged by smelting activity accumulated predominantly in surface soil, and their concentration gradually decreased with depth. These results provide a scientific basis for the prevention and control of heavy metal pollution in the soil and groundwater of a smelting site.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Soil pollution Controlled terms:Adsorption - Adsorption isotherms - Cadmium metallography - Chemicals removal (water treatment) - Groundwater - Groundwater pollution - Heavy metals - Iron metallography - Land fill - Land reclamation - Lead metallography - Lead smelting - Slate - Soil pollution control - Soil surveys - Soils - Zinc smelting Uncontrolled terms:Adsorption capacities - Adsorption characteristic - Cation exchange capacities - Fourier transform infra reds - Heavy metal pollution - Physical and chemical properties - Prevention and controls - Solution concentration Classification code:442.2 Land Reclamation - 444.2 Groundwater - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 531.2 Metallography - 533.2 Metal Refining - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally Numerical data indexing:Temperature 2.88e+02K to 3.08e+02K, Temperature 2.98e+02K DOI:10.13227/j.hjkx.202012205 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688824 Title:Transport Influence and Potential Sources of Ozone Pollution for Nanjing During Spring and Summer in 2017 Title of translation:2017年春夏期间南京地区臭氧污染输送影响及潜在源区 Authors:Xie, Fang-Jian (1); Lu, Xiao-Bo (2); Yang, Feng (1); Li, Wen-Qing (3); Li, Jie (1); Xie, Yi-Song (1); Wang, Yan (1); Liu, Yi-He (1); Wang, Qing-Jiu (1); Hu, Jian-Lin (4, 5) Author affiliation:(1) Nanjing Municipal Academy of Ecological and Environment Protection Science, Nanjing; 210093, China; (2) Nanjing Environmental Monitoring Center of Jiangsu Province, Nanjing; 210093, China; (3) Nanjing Bureau of Ecology and Environment, Nanjing; 210017, China; (4) Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (5) Jiangsu Key Laboratory of Atmospheric Environment Monitoring & Pollution Control, Nanjing; 210044, China Corresponding author:Hu, Jian-Lin(jianlinhu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:88-96 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the 24-hour backward trajectories of air mass at ground level(10 m)in Nanjing were calculated by using the HYSPLIT model with the NCEP global reanalysis data from April 1st to October 31st, 2017. The backward trajectories were then combined with the hourly concentration data of O3 in Nanjing for trajectories clustering analysis and potential pollution sources analysis. The results show that in 2017, the maximum daily 8 h running average O3 level in Nanjing was around 12-261 μg•m-3 with 58 days of O3 pollution in Nanjing, mainly in the spring and summer. The monthly variation of O3 showed a single peak, with the highest O3 concentration, as well as the most days exceeding the standard, occurring in June; the diurnal variation of O3 was unimodal and reached its peak around 14:00. A total number of 5 136 trajectories were obtained by simulation, among which the exceeded trajectories accounted for approximately 10%. The exceedance trajectories in May and June were significantly higher, accounting for 60% of the total exceedance trajectories. Six ground-level air mass transporting pathways were identified through clustering analysis, from the NNE, NW, SW, SSE, SE, and NE directions. The SE and SSE directions with higher O3 levels were the dominant transport routes of O3 pollution, contributing to 23.33% and 20.76% of backward trajectories, respectively. As for the potential pollution source analysis, the area with high WCWT value distribution matched the WPSCF result, indicating that the potential sources of O3 pollution were mainly distributed in Changzhou, Wuxi, Suzhou, Huzhou, and other cities around Taihu Lake. Additionally, cities located around Nanjing, such as Taizhou, Ma'anshan, Wuhu, Chuzhou, Nantong, and Lianyungang, were considered the secondary potential sources. The results indicate that O3 pollution in Nanjing is a regional issue and its control requires joint prevention and control strategies in the Yangtze River Delta.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:River pollution Controlled terms:Pollution control - Springs (components) - Trajectories - Transportation routes Uncontrolled terms:Backward trajectory - Clustering analysis - Concentration data - Diurnal variation - Potential pollutions - Prevention and controls - Value distribution - Yangtze river delta Classification code:453 Water Pollution - 601.2 Machine Components Numerical data indexing:Age 1.59e-01yr, Percentage 1.00e+01%, Percentage 2.08e+01%, Percentage 2.33e+01%, Percentage 6.00e+01%, Size 1.00e+01m, Time 2.88e+04s, Time 8.64e+04s DOI:10.13227/j.hjkx.202005077 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910650990 Title:High-frequency Responses to the COVID- 19 Shutdown of Heavy Metal Elements in PM2.5 in Shanghai Title of translation:上海市PM2.5中重金属元素对COVID- 19控制的高频响应 Authors:Cheng, Kai (1); Chang, Yun-Hua (1); Kuang, Ya-Qiong (1); Zou, Zhong (2) Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai; 200433, China Corresponding author:Chang, Yun-Hua(changy13@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3644-3651 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To study the evolution and sources of heavy metal elements in the urban atmosphere before, during (overlapped with Chinese Lunar New Year), and after China's COVID- 19 shutdown, a multi-metal online analyzer was deployed to determine the trace elements in PM2.5 in Shanghai from January 1 to February 26, 2020. Meanwhile, source apportionment of the hourly measured heavy metal concentrations was performed using a PMF model, in which eight sources were identified. The results show that the concentrations of most elements presented a "V-shaped" trend, which was mainly influenced by emissions from fireworks (K, Cu, Ba as indicative elements), Se-related industry, road dust (Ca, Fe, Ba), and motor vehicles (Mn, Zn, Fe, Cu). However, during the COVID- 19 shutdown period, the concentrations of K, Ba, and Cu were high. Case-specific analysis suggested that prior to the shutdown period, the high concentrations of Cu were significantly influenced by long-range transport, which shifted to a dominant contribution from local fireworks during the shutdown period.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Trace elements Controlled terms:Explosives - Frequency response - Heavy metals Uncontrolled terms:Dominant contributions - Heavy metal concentration - Heavy metal elements - High frequency response - Long range transport - Online analyzers - Source apportionment - Urban atmospheres Classification code:531 Metallurgy and Metallography DOI:10.13227/j.hjkx.202012049 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003429 Title:Distribution Characteristics of Carbon, Nitrogen, and Phosphorus Bearing Pollutants in the Ancient Town Rivers of Suzhou Title of translation:苏州古城区域河道碳氮磷类污染物的分布特征 Authors:Bai, Dong-Rui (1); Zhang, Tao (1); Chen, Tan (1); Wang, Hong-Tao (2); Jin, Xi (2); Zheng, Kai-Xuan (2); Li, Zhong-Lei (2); Yang, Ting (1); Jin, Jun (1) Author affiliation:(1) College of Life and Environmental Sciences, Minzu University of China, Beijing; 100081, China; (2) School of Environment, Tsinghua University, Beijing; 100084, China Corresponding authors:Chen, Tan(chentan05@tsinghua.org.cn); Wang, Hong-Tao(htwang@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1403-1415 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Suzhou is a water-deficient city with water quality issues. Despite water conservation measures, emission reductions, source control, and pollution interception, water quality remains poor. To understand the total mass and distribution characteristics of carbon, nitrogen, and phosphorus bearing pollutants and inform decisions regarding river dredging, sediment and water samples were collected from 20 representative sections in the town's rivers during the spring of 2019. The depths of the sediments were measured along with the concentrations of carbon, nitrogen, and phosphorus bearing pollutants in the sediments and water, and the pollution degree was evaluated. Variations in various parameters were predicted for change water, diversion water, rainfall, and dredging. The results show that the sediment depths ranged between 22 and 1 025 mm (average=266 mm), and the total mass of sediment was approximately 5.2×105 t in the ancient town rivers of Suzhou. The average proportions and concentrations of TOC, TN, NH4+-N, TP, and AP in the sediments were 3.4%, 2 074 mg•kg-1, 140.2 mg•kg-1, 1 765 mg•kg-1, and 57.2 mg•kg-1, respectively, indicating a moderate level of pollution. The concentration of TP in the sediments at 90% of the sampling points exceeds the national standard. Huancheng River was found to have the highest concentration of TP, suggesting that dredging shuld be targeted here first. In the water samples, the average concentrations of TOC, BOD5, COD, TN, NH4+-N, Kjeldahl nitrogen, TP, and PO43--P were 7.8, 0.6, 13.1, 2.5, 0.643, 1.3, 0.18, and 0.09 mg•L-1, respectively, indicating a severe level of pollution. Overall, water quality in these rivers falls below Class V surface water, and the concentration of TN seriously exceeds the national standard. Based on the patterns of total carbon mass and nitrogen and phosphorus bearing pollutants, the recommended order of dredging in Suzhou is the Huancheng River, the northern rivers of the ancient town, Ganjiang River, and the southern rivers of the ancient town. Under the rainfall scenario, the initial concentrations of pollutants in runoff were high, which leads to a decline in water quality. The total mass of TN in the water was reduced by 0.2 t under the change water and diversion water scenarios, and was further reduced by 4.58 t and 2.19 t, respectively, after dredging. Phosphorus bearing pollutants in the sediment were mainly imported from other sources, meaning that the total mass of TP in the water may increase following dredging activities.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:River pollution Controlled terms:Carbon - Dredging - Emission control - Nitrogen - Phosphorus - Quality control - Rain - Rivers - Sediments - Water conservation - Water pollution control - Water quality Uncontrolled terms:Average concentration - Conservation measures - Distribution characteristics - Emission reduction - Initial concentration - Nitrogen and phosphorus - Sediments and waters - Water quality issues Classification code:443.3 Precipitation - 444 Water Resources - 445.2 Water Analysis - 451.2 Air Pollution Control - 453 Water Pollution - 453.2 Water Pollution Control - 483 Soil Mechanics and Foundations - 804 Chemical Products Generally - 913.3 Quality Assurance and Control Numerical data indexing:Mass_Density 9.00e-05kg/m3 to 2.20e-02kg/m3, Percentage 3.40e+00%, Percentage 9.00e+01%, Size 2.20e-02m to 1.02e+00m DOI:10.13227/j.hjkx.202008109 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066056 Title:Natural Water Chemistry Change in the Surface Water of Chengdu and Impact Factors Title of translation:成都市地表水天然水化学变化特征及影响因素 Authors:Xu, Qiu-Jin (1); Lai, Cheng-Yue (2); Ding, Yao (2); Wang, Zhao-Li (2); Cheng, Zhong-Hua (3); Yu, Tao (3) Author affiliation:(1) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) Chengdu Academy of Environmental Sciences, Chengdu; 610072, China; (3) College of Environmental Science and Engineering, Yangzhou University, Yangzhou; 225217, China Corresponding author:Yu, Tao(yutao0325@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5364-5374 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the impact of megacities on the chemistry of surface waters, monthly sampling and monitoring were conducted in the Chengdu section of the Minjiang and Tuojiang River basin, corresponding to the upper reaches of the Yangtze River since the spring of 2019, including the influent and effluent water samples from 57 sewage treatment plants in Chengdu. All the samples were analyzed for major ions and other water chemistry parameters, and compared with the historical data of the Minjiang and Tuojiang River. The results showed that the Chengdu surface water still presented a natural chemistry with medium-low total dissolved solids(TDS), and calcium bicarbonate chemistry type, which is the natural consequence of the weathering of carbonate rocks in the basin effected by the weathering of silicates and evaporites. The natural water chemistry of the surface waters in Chengdu presented monthly variation, i.e., the concentration of major ions and TDS was higher in the dry season compared to the wet season, reflecting the variations of point source. Spatially, the concentration of major ions and TDS downstream of the city was higher than those in the upper reaches, and the concentration in the tributary was higher than that in the mainstream, which may reflect urban influence. Further analyses, such as simulation calculations, indicated that urban activities were the major driving factor for the chemistry change in the surface waters in Chengdu, which is evidenced by the significant contribution of the sewage discharge to the elevated Cl- and Na+ and the ratio of hardness/alkalinity>1 from anthropogenic acid gas emissions. A comparison with the water chemistry of the Minjiang and Tuojiang River in the 1960s indicated that, the current Cl-/Na+ ratio has significantly increased, which has been evidenced by a salinization trend. As a megacity nearest to the source of the Yangtze River, the impact of Chengdu on the natural water chemistry of the Yangtze River system and its environmental effects deserves more attention.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Effluents Controlled terms:Calcium carbonate - Chemical analysis - Effluent treatment - Gas emissions - Hydrochemistry - Ions - River pollution - Rivers - Silicates - Sulfur compounds - Weathering Uncontrolled terms:Chengdu - Impact factor - Major ions - Megacities - Natural water chemistry - Natural waters - Total dissolved solids - Water chemistry - Water environments - Yangtze River Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 453 Water Pollution - 481.2 Geochemistry - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202103156 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066046 Title:Response of Soil Organic Carbon Content in Different Slope Positions to Fertilization Management in Purple Soil Sloping Fields Title of translation:紫色土旱坡地不同坡位土壤有机碳组分含量对施肥管理的响应 Authors:Xu, Man (1); Yu, Luo (2); Wang, Fu-Hua (1); Wang, Dan (3); Wang, Ying-Yan (1); Yang, Wen-Na (1); Gao, Ming (1); Wang, Zi-Fang (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Bishan District Flood Control and Drought Relief Dispatching Center, Chongqing; 402760, China; (3) Chongqing Institute of Geology and Mineral Resources, Chongqing; 401120, China Corresponding author:Wang, Zi-Fang(zifangw@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5491-5499 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The purple soil sloping field is the main cultivated land type in the Three Gorges area, and the soil fertility directly determines crop yield. In order to explore the effects of different fertilization treatments on the soil organic carbon content at different slope positions, field experiments were carried out at the Three Gorges Reservoir Test Station of Chengdu Institute of Mountain and Disasters, Chinese Academy of Sciences. A total of five treatments were set up: no fertilization(CK), conventional fertilization(T1), optimum fertilization(T2), biochar combined with 85% of T2(T3), and straw combined with 85% of T2(T4), to study the differences in soil aggregate composition, soil total organic carbon, soluble organic carbon, and microbial carbon content at different slope positions under different fertilization treatments. The results showed that: ①Fertilization increased the content of soil mass and improved the organic carbon content of soil, especially with T3 and T4 treatments. ②The sequence of distribution of soil organic carbon content with CK, T1, and T2 treatments in different slope positions was downslope position>middle slope position>upslope position, while the soil organic carbon content of T3 and T4 treatments was the highest at the middle slope position. ③With the decrease of slope, the soluble organic carbon content of CK, T1, T2, and T3 treated soil showed an increasing trend; the carbon content of CK, T1, T2, and T4 treated soil microorganisms increased; while the distribution of T3 treated soil microbial carbon on the slope was highest at the middle slope followed by the lower slope. In general, both biochar and straw treatments can significantly increase soil carbon content and delay the migration of soil carbon on slopes, which provides guidance for improving the soil quality and reducing water pollution of purple soil dry slopes in the Three Gorges reservoir area.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Soils Controlled terms:Organic carbon - Reservoirs (water) - Soil pollution - Water pollution Uncontrolled terms:Biochar - Carbon content - Different slopes - Fertilisation - Purple soil sloping field - Purple soils - Slope - Slope positions - Sloping fields - Soil organic carbon content Classification code:441.2 Reservoirs - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds Numerical data indexing:Percentage 8.50E+01% DOI:10.13227/j.hjkx.202103097 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065982 Title:Composition and Distribution of Microplastics in the Water and Sediments of Urban Rivers in Beijing Title of translation:北京城市河流河水和沉积物中微塑料的组成与分布 Authors:Hu, Jia-Min (1); Zuo, Jian-E (1, 2); Li, Di (1); Xie, Zhen-Wen (1); Chen, Lei (1) Author affiliation:(1) State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China; (2) Shenzhen International Graduate School, Tsinghua University, Shenzhen; 518055, China Corresponding authors:Zuo, Jian-E(jiane.zuo@mail.tsinghua.edu.cn); Zuo, Jian-E(jiane.zuo@mail.tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5275-5283 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
It has been confirmed that microplastics widely exist in the natural environment, causing potential harm to organisms and humans. An investigation into the occurrence of microplastics is helpful to understand the level of pollution of microplastics in urban rivers and sediments. In this study, eight sampling points of water samples and three of sediments samples were placed along the North Canal and Huaihe River in Beijing, to compare the composition and distribution characteristics of the abundance, particle size, color, shape, and species of microplastics. The results showed that the abundance of microplastics in the water and sediments of the North Canal were(1 941±201)-(8 155±1 781)n•m-3(n refers to the number of microplastics) and (120±11)-(268±31)n•kg-1, respectively. The average abundance of microplastics in the water of the North Canal was 4 160 n•m-3. Compared with the North Canal, the pollution degree of microplastics in the Huaihe River was lower with an average abundance of 2 357 n•m-3. Furthermore, the abundance of microplastics in the water and sediments in the upper reaches of the North Canal was higher than that in the lower reaches. No significant difference of microplastics distribution was observed in the water of the Huaihe River on the whole; however, there was a marked difference in abundance between the two distant locations. The main particle size range of microplastics at all site points was<300 μm, and mostly white/transparent(50.75%-83.91%); the main shape were fragments(50.00%-95.08%)and fibers(3.86%-30.00%). Polyurethane(PU)and ethylene vinyl acetate(EVA)were two main plastic species found at all sites. Microplastics in the water and sediments of the North Canal might have originated from urban construction and development, while the surrounding villages might have only affected the abundance of microplastics in the Huaihe River.
© 2021, Science Press. All right reserved. Number of references:23 Main heading:Sediments Controlled terms:Ethylene - Microplastic - Particle size - River pollution - Rivers - Thermoplastic elastomers - Urban growth Uncontrolled terms:Distribution - Huaihe river - Microplastics - Natural environments - Potential harm - River water - Sampling points - Sediment samples - Urban river - Water samples Classification code:403.1 Urban Planning and Development - 453 Water Pollution - 454.2 Environmental Impact and Protection - 454.3 Ecology and Ecosystems - 483 Soil Mechanics and Foundations - 804.1 Organic Compounds - 818.2 Elastomers Numerical data indexing:Percentage 3.86E+00% to 3.00E+01%, Percentage 5.00E+01% to 9.508E+01%, Percentage 5.075E+01% to 8.391E+01%, Size 3.00E-04m DOI:10.13227/j.hjkx.202102107 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066050 Title:Characteristics of Phosphorus Adsorption in Aqueous Solution by Si-modified Peanut Shell Biochar Title of translation:硅改性花生壳生物炭对水中磷的吸附特性 Authors:Zhao, Min (1); Zhang, Xiao-Ping (1, 2, 3, 4); Wang, Liang-Rong (5) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education, Guangzhou; 510006, China; (3) Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou; 510006, China; (4) Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou; 510006, China; (5) Guangdong Suchun Environmental Protection Technology Co., Ltd., Dongguan; 523000, China Corresponding authors:Zhang, Xiao-Ping(xpzhang@scut.edu.cn); Zhang, Xiao-Ping(xpzhang@scut.edu.cn); Zhang, Xiao-Ping(xpzhang@scut.edu.cn); Zhang, Xiao-Ping(xpzhang@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5433-5439 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this work, a novel sodium silicate-modified peanut shell biochar(Si-PSB)was synthesized and used as phosphorus adsorbents. Compared with unmodified biochar(PSB), the adsorption capacity of Si-PSBs increased significantly. The adsorption capacity of 8% sodium silicate solution modified biochar(8%Si-PSB)was 3.9 times higher than that of PSB. The biochar was characterized using scanning electron microscopy(SEM), Fourier transformed infrared(FTIR), and X-ray diffraction(XRD), which confirmed that silica was present on the surface of 8%Si-PSB. The introduction of silica improved the reaction activity of biochar's own metal ions by affecting the morphology of calcium carbonate. The 8%Si-PSB had a good adsorption effect on phosphorus in both acid and alkali environments. Phosphorus adsorption by 8%Si-PSB and PSB was described well by the pseudo-second-order model, and the adsorption capacity after equilibrium fluctuated between 2.79 mg•g-1 and 0.71 mg•g-1, respectively. Further, the isothermal adsorption experimental data fitted well to the Langmuir model. The presence of humic acid in the solution inhibited the adsorption of phosphorus by the 8%Si-PSB and PSB. The 8%Si-PSB, as a new low-cost phosphorus removal material, can improve the utilization of metal ions in peanut shell itself.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:Silica Controlled terms:Adsorption - Calcium carbonate - Fourier transform infrared spectroscopy - Metal ions - Metals - Morphology - Oilseeds - Phosphorus - Scanning electron microscopy - Silicates - Silicon - Sodium compounds Uncontrolled terms:Adsorption capacities - Biochar - Fourier - Peanut shells - Phosphorus adsorbents - Phosphorus adsorption - Phosphorus(P) - Sodium silicate - Sodium silicate solutions - Synthesised Classification code:531.1 Metallurgy - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 821.4 Agricultural Products - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science Numerical data indexing:Mass 1.00E-06kg, Mass 2.79E-06kg, Mass 7.10E-07kg, Percentage 8.00E+00% DOI:10.13227/j.hjkx.202103012 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239883 Title:Pollution Characteristics and Risk Assessment of Typical POPs in Typical Drinking Water Sources in Wuhan Title of translation:武汉典型饮用水水源中典型 POPs污染特征与健康风险评估 Authors:Zhang, Kun-Feng (1, 2, 3); Fu, Qing (1, 2); Tu, Xiang (1, 2); Chang, Sheng (1, 2); Fan, Yue-Ting (1, 2); Sun, Xing-Bin (3); Wang, Shan-Jun (1, 2) Author affiliation:(1) State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Forestry, Northeast Forestry University, Harbin; 150040, China Corresponding authors:Tu, Xiang(tu_xiang@qq.com); Tu, Xiang(tu_xiang@qq.com); Chang, Sheng(changsheng83@163.com); Chang, Sheng(changsheng83@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5836-5847 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To identify the pollution characteristics and risk level of common persistent organic pollutants (POPs) in drinking water sources in Wuhan, solid-phase extraction-gas chromatography-mass spectrometry (SPE-GC-MS) was used to analyze 26 water samples from 18 drinking water sources located in the mainstream and tributaries of the Changjiang River, Wuhan. The concentrations of polycyclic aromatic hydrocarbons (PAHs), organochloride pesticides (OCPs), and polychlorinated biphenyls (PCBs) were measured, the pollution status of the common POPs was analyzed, and their health risks were assessed. The results showed the presence of PAHs in all the 26 samples. Except for benzo(k)fluoranthene, which had a detection rate of 88.46%, the detection rates of the other 15 PAHs were 100.00%. The detection range of ρ∑PAHs was 57.04-475.79 ng•L-1, with an average of 173.86 ng•L-1. The pollution levels of PAHs were overall low and the PAHs mainly comprised low and medium cyclic aromatic hydrocarbons derived from a mixed source, and dominated by petroleum derivatives. A total of eight OCPs were detected, and the range of ∑OCPs was ND-4.57 ng•L-1 with a mean concentration of 0.78 ng•L-1, which indicated that the concentration levels of OCPs were relatively low. A total of 24 types of PCBs were detected, and the range of ρ∑PCBs was ND-77.49 ng•L-1 with a mean of 9.88 ng•L-1. The PCBs mainly comprised refractory high-chlorinated biphenyls, and the concentrations of PCBs in some samples exceeded the limit of the surface water standard in China. Our results suggest that the concentration of HeptaCBs-180 should be continuously monitored in the future. The results of the health risk assessment showed that the carcinogenic risk indexes of PAHs and PCBs in our study area were in the range of 10-6 to 10-4, which may pose a potential carcinogenic risk to humans. The non-carcinogenic risk indexes of OCPs and PCBs were less than 1, and did not pose a non-carcinogenic risk to humans.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Organic pollutants Controlled terms:Gas chromatography - Health - Health risks - Mass spectrometry - Mineral oils - Phase separation - Polychlorinated biphenyls - Polycyclic aromatic hydrocarbons - Potable water - Risk assessment - River pollution - Surface waters Uncontrolled terms:Carcinogenic risk - Changjiang river - Characteristics levels - Detection rates - Drinking water sources - Organochloride pesticides - Persistent organic pollutant - Risk indices - Risks assessments - Wuhan Classification code:444 Water Resources - 444.1 Surface Water - 453 Water Pollution - 461.6 Medicine and Pharmacology - 461.7 Health Care - 513.3 Petroleum Products - 641.1 Thermodynamics - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass -4.57E-12kg, Mass -7.749E-11kg, Mass 1.7386E-10kg, Mass 5.704E-11kg to 4.7579E-10kg, Mass 7.80E-13kg, Mass 9.88E-12kg, Percentage 1.00E+02%, Percentage 8.846E+01% DOI:10.13227/j.hjkx.202105156 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239872 Title:Characteristics of Water Environment and Spatial-temporal Distribution of Nitrogen and Phosphorus Load in the Yellow River Title of translation:黄河水环境特征与氮磷负荷时空分布 Authors:Han, Xu (1); Pan, Bao-Zhu (1); Chen, Yue (1); Liu, Ya-Ping (1); Hou, Yi-Ming (1) Author affiliation:(1) State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an; 710048, China Corresponding author:Pan, Bao-Zhu(zhuzipan@xaut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5786-5795 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The Yellow River is the important water supply source for Northwest China and North China, whereas natural factors such as topography, rainfall, and intense human activities have brought about prominent water environment problems in the Yellow River basin. The main stream of the Yellow River was investigated from April to May and October to November of 2019 to clarify characteristics of the water environment, the current water quality status, and the spatiotemporal distribution of nitrogen and phosphorus loads. On the basis of observations and a laboratory analytical experiment, it was found that: ① The multiple parameter values increased from the source area to the estuary, which is the reflection of the combined effects of increasingly frequent human activities and soil erosion in the middle and lower reaches. Furthermore, reservoirs have significant effects on the retention and deposition of solutes; ② There is not much difference between water quality in the two seasons, and the water quality level dropped from "excellent" to "ordinary" from the source area to the estuary; ③ Rainfall played a critical role in the temporal difference in the occurrence forms of nitrogen and phosphorus and their load in the Yellow River basin; ④ The spatial difference in the occurrence forms and load of nitrogen and phosphorus in the Yellow River basin is mainly controlled by the effects of human activities and soil erosion. The study is expected to lay a scientific basis for controlling nitrogen and phosphorus load and improving water quality in the Yellow River basin.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Water quality Controlled terms:Erosion - Nitrogen - Phosphorus - Quality control - Rain - Reservoirs (water) - Rivers - Soils - Spatial distribution - Topography - Water supply - Watersheds Uncontrolled terms:Human activities - Nitrogen and phosphorus - Nitrogen loads - Phosphorus loads - Soil erosion - Source area - Spatiotemporal distributions - Water environments - Yellow river - Yellow River basin Classification code:405.3 Surveying - 441.2 Reservoirs - 443.3 Precipitation - 444.1 Surface Water - 445.2 Water Analysis - 446.1 Water Supply Systems - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 902.1 Engineering Graphics - 913.3 Quality Assurance and Control - 921 Mathematics - 951 Materials Science DOI:10.13227/j.hjkx.202104004 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239967 Title:Dynamic of Net Anthropogenic Nitrogen Inputs and Riverine Nitrogen Export in the Yangtze River Basin in 1980-2015 Title of translation:1980~2015年长江流域净人为氮输入与河流氮输出动态特征 Authors:Yao, Meng-Ya (1); Hu, Min-Peng (1); Chen, Ding-Jiang (1) Author affiliation:(1) College of Environmental and Resource Sciences, Zhejiang University, Hangzhou; 310058, China Corresponding author:Chen, Ding-Jiang(chendj@zju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5777-5785 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To advance accurate controls of riverine nitrogen pollution in the Yangtze River basin (YRB), historical trends of net anthropogenic nitrogen inputs (NANI) and riverine dissolved inorganic nitrogen (DIN) export at Datong station and their dynamic relationship were addressed to develop a multiple regression model for predicting riverine DIN export and its source. Results showed that NANI in the YRB increased continuously from 4 166 kg•(km2•a)-1 in 1980 to 8 571 kg•(km2•a)-1 in 2015. Increasing population density and livestock density are major drivers for the rapid increase of NANI. Chemical fertilizer and net food/feed input were the main sources of NANI, with 69% of NANI entering into agricultural/forest lands (NANIN) and 31% of NANI entering into residential lands (NANIP). Riverine DIN export increased continuously from 455 kg•(km2•a)-1 in 1980 to 1 811 kg•(km2•a)-1 in 2015. Riverine DIN export was not only closely related to NANI, NANIN, and NANIP, but was also influenced by watershed legacy nitrogen sources and dam storage capacity. A multiple non-linear regression model incorporating NANIN, NANIP, and dam storage capacity could explain 92% of temporal variability in riverine DIN flux. This multiple regression model estimated that the current year's NANI, legacy nitrogen source, and natural background source contribute to 58%, 36%, and 6% of annual riverine DIN flux on a 36-year average, respectively. Therefore, enhancing collaborative management of NANI and legacy nitrogen is necessary to efficiently control nitrogen pollution in the Yangtze River.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Nitrogen Controlled terms:Agriculture - Fertilizers - Linear regression - Population statistics - River pollution - Rivers - Watersheds Uncontrolled terms:Anthropogenics - Dissolved inorganic nitrogens - Multiple regression modelling - Net anthropogenic nitrogen input - Nitrogen export - Nitrogen pollution - Riverine nitrogen export - Riverine nitrogens - Sources identifications - Yangtze River basin Classification code:444.1 Surface Water - 453 Water Pollution - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.2 Agricultural Chemicals - 922.2 Mathematical Statistics Numerical data indexing:Age 3.60E+01yr, Mass 1.66E+02kg, Mass 4.55E+02kg, Mass 5.71E+02kg, Mass 8.11E+02kg, Percentage 3.10E+01%, Percentage 3.60E+01%, Percentage 5.80E+01%, Percentage 6.00E+00%, Percentage 6.90E+01%, Percentage 9.20E+01%, Size -2.54E-02m DOI:10.13227/j.hjkx.202104259 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066057 Title:Adsorption Characteristics of Pb(Ⅱ)on Eucalyptus Biochar Modified by Potassium Permanganate Title of translation:高锰酸钾改性桉木生物炭对Pb(Ⅱ)的吸附特性 Authors:Mo, Zhen-Lin (1, 2); Zeng, Hong-Hu (1, 3); Lin, Hua (1, 2); Shahab, Asfandyar (1, 2); Shi, Qing-Liang (1, 2); Zhang, Hua (1, 2) Author affiliation:(1) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541006, China; (2) Guangxi Collaborative Innovation Center of Water Pollution Control and Water Safety in Karst Area, College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541006, China; (3) Science and Education Combined with Science and Technology Innovation Base, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin; 541006, China Corresponding authors:Zhang, Hua(zhanghua5127@163.com); Zhang, Hua(zhanghua5127@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5440-5449 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Eucalyptus biochar(BC)was prepared and potassium permanganate was used to modify the biochar(KBC). Static adsorption experiments on Pb(Ⅱ) in aqueous solution were carried out to investigate the effects of pH, adsorbent dosing, adsorption time, temperature, and initial concentration on the adsorption of Pb(Ⅱ). The results showed that the optimum pH was 5 while the adsorption reached saturation after 6 h. When the temperature was 25℃, the initial concentration of Pb(Ⅱ) was 100 mg•L-1 with an adsorbent dosage of 0.06 g; the maximum adsorption of Pb(Ⅱ) by KBC was 83.059 mg•g-1, with a removal rate of 99.67%. The adsorption of Pb(Ⅱ)by KBC followed the pseudo-second-order kinetic model and the Langmuir isothermal adsorption model, which is a monolayer adsorption occurring on a homogeneous surface. The adsorbents were characterized using the BET method, scanning electron microscopy and energy dispersive spectroscopy(SEM-EDS), X-ray diffraction(XRD), Fourier transformed infrared(FT-IR) and X-ray photoelectron spectroscopy(XPS). The adsorption mechanism of Pb(Ⅱ) by KBC oxygen-containing and manganese-containing groups was through complexation and precipitation, and the formation of -O-Pb-O- bidentate complexes on the surface of the biochar. Therefore, potassium permanganate-modified BC can be used as a good Pb(Ⅱ) adsorbent.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Adsorption Controlled terms:Energy dispersive spectroscopy - Lead compounds - Manganese compounds - Monolayers - Potash - Scanning electron microscopy - X ray photoelectron spectroscopy Uncontrolled terms:Adsorption characteristic - Adsorption experiment - Adsorption of pb - Biochar - Effect of pH - Eucalypti biochar - Initial concentration - Modification - Pb(ⅱ) - Static adsorption Classification code:802.3 Chemical Operations - 804.2 Inorganic Compounds Numerical data indexing:Mass 1.00E-04kg, Mass 6.00E-05kg, Mass 8.3059E-05kg, Percentage 9.967E+01%, Time 2.16E+04s DOI:10.13227/j.hjkx.202103040 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065988 Title:Analysis and Prediction of Health Risk from Heavy Metals in Drinking Water Sources Based on Time Series Model Title of translation:基于时间序列模型的饮用水源地重金属健康风险分析与预测 Authors:Ji, Chao (1); Hou, Da-Wei (1); Xie, Li (1); Sun, Hua (1); Li, Fa-Zhi (1); Zhou, Yu (1); Deng, Ai-Ping (2, 3); Shen, Hong-Jun (2, 3); Bao, Guang-Jing (4); Wang, Yi-Nan (1) Author affiliation:(1) College of Public Administration, Nanjing Agricultural University, Nanjing; 210095, China; (2) Jiangsu Environmental Monitoring, Nanjing; 210036, China; (3) Jiangsu Key Laboratory of Environment and Health, Nanjing; 210036, China; (4) College of Urban and Environment, Yunnan University of Finance and Economics, Kunming; 650221, China Corresponding authors:Sun, Hua(sh@njau.edu.cn); Deng, Ai-Ping(108823362@qq.com); Deng, Ai-Ping(108823362@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5322-5332 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Health risk analysis can predict and control the risks posed by heavy metals, especially in drinking water, which is a highly sensitive environmental receptors. In order to evaluate heavy metal pollution in drinking water, the monthly average concentrations of As, Cd, Cu, Hg, Ni, and Zn were used to assess the health risk between January 2015 and December 2018 in a drinking water source. Furthermore, Spearman rank correlation coefficient and the ARIMA model were used to analyze temporal variations. The results showed that the monthly average concentrations of heavy metals exceeded the class Ⅲ values as specified by Chinese environmental quality standard for surface water(GB 3838-2002), especially Hg with a minimum monthly average four times more than that set by the standard limits. Overall, the order of carcinogenic risk of As and Cd was decreased; the non-carcinogenic risk of Zn, Cu, Ni, Pb, and Hg was increased. Further, the comprehensive non-carcinogenic risk for adults was lower than 1 throughout the study period except February 2015, when the comprehensive non-carcinogenic risk for children was lower than or close to 1 after October 2017, and the comprehensive carcinogenic risk for children was more than 10-4. Meanwhile, the children's health risks are higher than that for adults, with the main health risk characteristic factors of As, Cd, and Hg. The Spearman rank correlation coefficient were -0.714 069, -0.773 122, and -0.622 34, indicating the significant downward trend from 2015 to 2018. However, the children's comprehensive carcinogenic risk, whose average value was 0.000 234 much more than 10-4, had significant upward trend in 2018 with Spearman rank correlation coefficient 0.902 098. The ARIMA(3, 1, 3)model was able to predict the comprehensive carcinogenic risk for children from heavy metals in drinking water, and the result indicated the children comprehensive carcinogenic risk should be monitored to ensure levels between 0.000 200 and 0.000 302. The study has positive significance for risk warning and environmental management compared to the analysis and prediction of health risk from heavy metals in drinking water sources based on time series models.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Heavy metals Controlled terms:Environmental management - Forecasting - Health - Health risks - Metal analysis - Potable water - Quality control - Risk analysis - Risk assessment - River pollution - Surface waters - Time series analysis Uncontrolled terms:ARIMA models - Average concentration - Carcinogenic risk - Drinking water sources - Environmental receptors - Health risk analysis - Heavy metals pollution - Spearman's rank correlation coefficients - Temporal variation - Times series models Classification code:444 Water Resources - 444.1 Surface Water - 453 Water Pollution - 454.1 Environmental Engineering, General - 454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 461.7 Health Care - 531 Metallurgy and Metallography - 913.3 Quality Assurance and Control - 914.1 Accidents and Accident Prevention - 922 Statistical Methods - 922.2 Mathematical Statistics Numerical data indexing:Size 5.12572E+01m DOI:10.13227/j.hjkx.202103122 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066049 Title:Characteristics and Influencing Factors of Cadmium Accumulation in Different Rice Varieties Under Cadmium Contaminated Field Conditions Title of translation:镉污染大田条件下不同品种水稻镉积累的特征及影响因素 Authors:Wang, Yu-Hao (1); Yang, Li (1); Kang, Yu-Chen (1); Chen, Xiao-Hong (1); Peng, Jie (1); Li, Jia-Xin (1); Chen, Wen-Qing (1) Author affiliation:(1) College of Architecture & Environment, Sichuan University, Chengdu; 610065, China Corresponding author:Chen, Wen-Qing(chenwenqing@scu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5545-5553 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Eight rice varieties suitable for local cultivation were selected and field tests were carried out to compare the accumulation, absorption, and transport characteristics of Cd. The rice varieties with low Cd accumulation were screened, and the factors affecting the accumulation degree and stability of rice were analyzed. The results showed that: ①According to the comprehensive accumulation index(PN)evaluation method, the rice varieties with low PN ability for Cd were selected as follows: Chuanyou 3203, Chuanyou 6203, Dejing 6, and Shenyou 17. ②Considering the Cd content and yield of rice, Chuanyou 3203 and Chuanyou 6203 are suitable for planting in this region, which guarantees a safe Cd content in and high yield of rice. ③The contents of Cd in Chuanyou 3203 and Chuanyou 6203 were significantly lower than those of other rice varieties and stable under different pH and total Cd ranges and soil conditions. ④The difference between rice varieties had a significant effect on rice enrichment ability, but little effect on translocation from stem to leaf. The low enrichment coefficient of Chuanyou 3203 and Chuanyou 6203, combined with low translocation, demonstrated the low Cd enrichment capacity of rice. ⑤Correlation analysis showed that the Cd content was most affected by the enrichment coefficient of rice, and least affected by the total Cd content of rhizosphere soil.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Cadmium Controlled terms:Soils Uncontrolled terms:Absorption characteristics - Accumulation characteristics - Cadmium accumulation - Cd accumulation - Enrichment coefficients - Field - Field conditions - Field test - Rice variety - Transport characteristics Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals DOI:10.13227/j.hjkx.202104206 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065986 Title:Characteristics and Origin Analysis of Air Pollution During the Spring Festival in Linfen, Fenwei Plain Title of translation:汾渭平原临汾市2019年春节期间大气污染特征与来源解析 Authors:Liu, Wei-Jie (1, 2); Hu, Tian-Peng (1); Mao, Yao (2, 3); Xu, An (1); Su, Ye-Wang (1); Li, Xing-Yu (1); Cheng, Cheng (1); Shi, Ming-Ming (1); L.-L., Liang; X.-L., Xing; J.-Q., Zhang; S.-H., Qi Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation, School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi; 435003, China; (3) State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan; 430074, China Corresponding author:Liang, Li-Li(lianglily99@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5122-5130 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In recent years, frequent haze episodes have resulted in the deterioration of air quality of the Fenwei Plain during winter and holidays. Besides coal combustion and industrial emissions, the topography and climate of the Fenwei Plain were also the main causes of the haze. The samples were collected in Linfen of Fenwei Plain during the Spring Festival from February 2 to February 13, 2019. The 13 elements(Li, Be, Ti, Rb, Sc, Y, La, Ce, Zr, V, Tl, U, and Sn)in PM2.5 were determined by inductively coupled plasma mass spectrometry(ICP-MS). Combined with the meteorological data, the spatial and temporal distribution of pollutants and potential source analysis were evaluated by cluster analysis and backward trajectory. The average concentration of SO2 was 58.39 μg•m-3 during the sampling period, which exceeded the 24 h average mass concentration limit(50.00 μg•m-3)of national ambient air quality standard(GB 3095-2012). The average concentrations of O3, NO2, and CO was 52.15 μg•m-3, 29.02 μg•m-3, and 2.29 mg•m-3, respectively. The results showed that SO2 was the dominated pollutant. NO2 and CO were mainly affected by diffusion from urban areas. The backward trajectory analysis indicated that the basin topography of the Fenwei Plain may be the main cause of the haze. The analysis of potential source contribution function(PSCF)of soil sources showed that the potential dominated areas included Northern Shaanxi, southern Gansu and Southern Ningxia., which were mainly affected by the monsoon climate.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Deterioration Controlled terms:Air quality - Atmospheric movements - Cluster analysis - Coal combustion - Industrial emissions - Nitrogen oxides - Topography - Trajectories Uncontrolled terms:Average concentration - Backward trajectory - Characteristics analysis - Element - Fenwei plain - Inductively coupled plasma-mass spectrometry - Meteorological data - Origin analysis - PM 2.5 - Spatial and temporal distribution Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 723 Computer Software, Data Handling and Applications - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Mass 2.29E-06kg, Mass 2.902E-08kg, Mass 5.00E-08kg, Mass 5.215E-08kg, Mass 5.839E-08kg, Time 8.64E+04s DOI:10.13227/j.hjkx.202101238 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065987 Title:Effect of Vegetation Coverage on the Temporal and Spatial Distribution of PM2.5 Concentration in China's Eight Major Economic Regions from 1998 to 2016 Title of translation:1998~2016中国八大经济区植被覆盖对PM2.5浓度时空分布的影响 Authors:Yang, Yu-Lian (1, 2); Yang, Kun (1, 2); Luo, Yi (1, 2); Yu, Zhen-Yu (1, 2); Meng, Chao (1, 2); Li, Cen (1, 2) Author affiliation:(1) Faculty of Geography, Yunnan Normal University, Kunming; 650500, China; (2) GIS Technology Engineering Research Centre for West-China Resources and Environment, Ministry of Education, Yunnan Normal University, Kunming; 650500, China Corresponding authors:Yang, Kun(kmdcynu@163.com); Yang, Kun(kmdcynu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5100-5108 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The study researched the relationship between vegetation cover and PM2.5 pollution. The raster NDVI dataset from 1998 to 2016 were reclassified into low, medium, and high vegetation coverage area, and the corresponding PM2.5 concentration in eight economic regions in China were then calculated. On this basis, the temporal and spatial characteristics of PM2.5 pollution were analyzed and Pearson correlation coefficient was used to explore its correlation with NDVI landscape pattern indexes separately from landscape and class level NDVI. The preliminary results showed that: ①The northern, eastern, southern coastal, middle reaches of the Yangtze River, and the northeast economic zones have relatively low vegetation coverage in areas with relatively serious PM2.5 pollution. However, the middle reaches of the Yellow River, the southwestern and the Northwestern Economic Zones in areas with relatively low vegetation coverage showed lighter PM2.5 pollution. ②PM2.5 increased in most areas between 1998 and 2016. ③A significant correlation between PM2.5 and NDVI landscape pattern indexes was not found for all areas. ④Therefore, the impacts of the landscape shape index(LSI), percent of landscape(PLAND), number of patches(NP), largest patch index(LPI), and aggregation index(AI)on PM2.5 are heterogeneous.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Vegetation Controlled terms:Coastal zones - Correlation methods - River pollution Uncontrolled terms:Economic regions - Economic zones - Landscape pattern indices - Low-high - Normalized difference vegetation index - Panel data models - PM 2.5 - Temporal and spatial distribution - Vegetation cover - Vegetation coverage Classification code:453 Water Pollution - 471 Marine Science and Oceanography - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202101277 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688805 Title:Ozone Pollution Trend in the Pearl River Delta Region During 2006-2019 Title of translation:2006~2019年珠三角地区臭氧污染趋势 Authors:Zhao, Wei (1); Gao, Bo (1); Lu, Qing (1); Zhong, Zhi-Qiang (1); Liang, Xiao-Ming (1); Liu, Ming (1); Ma, She-Xia (1); Sun, Jia-Ren (1); Chen, Lai-Guo (1); Fan, Shao-Jia (2) Author affiliation:(1) State Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou; 510535, China; (2) School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou; 510275, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:97-105 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the monitoring data of the Guangdong-Hong Kong-Macao Pearl River Delta Regional (PRD) Air Quality Monitoring Network from 2006 to 2019, the ozone trend in RRD was analyzed using the Mann-Kendall test method, Sen's slope method, and the Pettitt change point test. The results show that: ① the average ozone concentration in the PRD has increased significantly from 2006 to 2019 (P<0.05), with an average growth rate of 0.80 μg•(m3•a)-1. After 2016, the rate of ozone increase has accelerated. ② The average annual ozone concentration in the central PRD increased significantly, while in the peripheral areas of the PRD, this is not obvious. Ozone increases significantly in summer but not in other seasons.③ From 2006 to 2019, the concentration of NO2in the central PRD decreased remarkably, so the titration effect weakened and resulted in an increase in the ozone concentration. The concentration of NO2 in the marginal areas of the PRD has little change, so the ozone concentration in these areas has little change. ④ With the changes of VOCs and NO2 concentrations, the chemical sensitivity of O3production in the PRD is changing. The VOC-limited regimes are continuously decreasing, and the mixed NOx-VOC-limited regimes and NOx-limited regimes are increasing. In order to deal with regional ozone pollution, the cooperative control of VOCs and NOx needs to strengthen.
© 2021, Science Press. All right reserved. Number of references:35 Main heading:River pollution Controlled terms:Air quality - Growth rate - Nitrogen oxides - Ozone - Pollution control - Testing Uncontrolled terms:Air quality monitoring networks - Average growth rate - Chemical sensitivity - Co-operative control - Mann-Kendall test - Ozone concentration - Pearl River Delta region - Regional ozone pollution Classification code:451.2 Air Pollution Control - 453 Water Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202005249 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945502 Title:Meta-analysis of Microbial Communities in the Activated Sludge of Wastewater Treatment Plants Under Different Climate Types Title of translation:不同气候类型下污水厂活性污泥中微生物群落比较 Authors:Yang, Si-Hang (1); Qin, Ze-Sheng (2); Liang, Man-Chun (1) Author affiliation:(1) Beijing Key Laboratory of City Integrated Emergency Response Science, Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing; 100084, China; (2) Beijing Global Safety Technology, Co., Ltd., Beijing; 100091, China Corresponding author:Liang, Man-Chun(lmc@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4844-4852 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Microbial communities in wastewater treatment plants(WWTPs)are very important for water purification in the context of public drinking water safety and environmental health. Therefore, it is necessary to explore the trends in microbial community structure and diversity in sewage treatment plants and their main environmental impact factors under different climates in China. Based on high-throughput sequencing techniques, a meta-analysis was conducted to screen the 16S rRNA genes in an open database. We analyzed the trends in microbial community structure and diversity in WWTPs under three climate types(Dwa, Cfa, and Cwa)in China. We then constructed cohesion models to examine the core microbial taxa and their interactions within the communities. We also used a piecewise structural equation model(PSEM)to examine the effects of different climate types on microbial community structure. The three climate types significantly affected the structure and diversity of the microbial communities, with patterns correlated with influent pH, mixed liquid temperature, conductivity, and nitrogen concentrations(P< 0.05). Based on the PSEM analysis, the β-diversity of the microbial communities was directly correlated with latitude, while α-diversity was indirectly correlated with latitude through conductivity and water temperature. Based on the cohesion modeling, microbial community stability was the highest under Dwa climate followed by the Cfa climate. This could be explained by a small subset of highly connected taxa capable of withstanding disturbance, indicating an important stability role. In contrast, the stability of the microbial communities under the Cwa climate was low, and no species with strong negative cohesion were observed. Overall, the structure, diversity, and stability of microbial community in WWTPs were found to be sensitive to climate, and the responsive mechanisms of α-diversity and β-diversity with respect to latitude were distinct.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Microorganisms Controlled terms:Climate models - Environmental impact - Potable water - RNA - Sewage pumping plants - Sewage treatment plants - Stability - Wastewater treatment - Water treatment plants Uncontrolled terms:Activated sludge - Climate type - High-throughput sequencing - Meta-analysis - Microbial communities - Microbial communities' diversities - Microbial community structures - Microbial ecology - Piece-wise - Structural equation models Classification code:443 Meteorology - 444 Water Resources - 445.1 Water Treatment Techniques - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 454.2 Environmental Impact and Protection - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 921 Mathematics DOI:10.13227/j.hjkx.202101193 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065989 Title:VOCs Emission Inventory and Uncertainty Analysis of Industry in Qingdao Based on Latin Hypercube Sampling and Monte Carlo Method Title of translation:基于LHS-MC青岛市工业源VOCs排放清单及不确定性 Authors:Xu, Wan-Ying (1); Fu, Fei (1); Lü, Jian-Hua (1); Li, Rui-Peng (1); Shao, Rui (1); He, Hui (1); Li, Shu-Fen (1); Zuo, Hua (1) Author affiliation:(1) Qingdao Research Academy of Environmental Sciences, Qingdao; 266003, China Corresponding author:Zuo, Hua(glzhzh@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5180-5192 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In recent years, fine particulate matter(PM2.5)and ozone(O3)have become the main air pollutants in cities in China. Volatile organic compounds(VOCs)are one of the important precursors of PM2.5, O3, and secondary organic aerosols. The establishment of VOCs emission inventory is therefore of great significance for controlling the amount of PM2.5 and O3. To date, the coefficient method has been used, which has error transmission of activity level, parameter and model, leading to the uncertainty of emission inventory. Multivariate uncertainty quantitative analysis of VOCs emission inventory provides an accurate alternative which has not been reported in China. The bottom-up method is adopted to collect the activity level of each enterprise. The variables of pollution control measures are obtained from surveys conducted with enterprises. The VOCs emission inventory of Qingdao from industrial source is established using an optimized coefficient method. The uncertainty of the VOCs inventory on the impact of univariate and multivariate variables is simulated by combining the Monte Carlo method(MC)with Latin hypercube sampling method(LHS). The results show that the total VOCs emissions were 44700 tons from industrial sources in 2019(unoptimized coefficient method: 31 100 tons).The rubber and plastic industries, metal products, and oil/coal/other fuel processing contributed more VOCs, which accounted for 40.26% of the total emissions. The uncertainty of multivariate simulation is higher than that of single variable. The uncertainty from process(-9.72%-230.51%)and solvent using source(-14.14%-122.77%)is significantly higher than uncertainty from combustion source(-15.62%-36.41%). The main sectors affecting the uncertainty of the VOCs inventory include: the chemical, papermaking, and textile industries(emission factors); metal, automobile manufacturing, and chemical industries(removal rate, facility operating rate); industries of petroleum processing and ferrous metal smelting(too few samples). VOCs emissions are mainly distributed in the east of the West Coast New district, north of Dazhu Mountain, south of Jimo district, north of Chengyang district, northeast of Jiaozhou district, built-up area of Pingdu district, and southeast of Laixi district.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Volatile organic compounds Controlled terms:Air pollution - Chemical industry - Gas chromatography - Industrial emissions - Monte Carlo methods - Petroleum industry - Plastics industry - Rubber industry - Steelmaking - Uncertainty analysis Uncontrolled terms:Activity levels - Coefficient methods - Emission characteristics - Emission inventories - Latin hypercube sampling methods - MonteCarlo methods - PM 2.5 - Qingdao - Uncertainty - Volatile organic compound emission Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 545.3 Steel - 802.3 Chemical Operations - 804.1 Organic Compounds - 805 Chemical Engineering, General - 818.4 Rubber Factories and Machinery - 922.1 Probability Theory - 922.2 Mathematical Statistics Numerical data indexing:Mass 1.00E+05kg, Mass 4.47E+07kg, Percentage -1.414E+01%, Percentage -1.562E+01%, Percentage -9.72E+00%, Percentage 1.2277E+02%, Percentage 2.3051E+02%, Percentage 3.641E+01%, Percentage 4.026E+01% DOI:10.13227/j.hjkx.202103148 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582354 Title:Removal Behavior of Protein-like Dissolved Organic Matter During Different Water Treatment Processes in Full-Scale Drinking Water Treatment Plants Title of translation:蛋白类有机质在水厂各处理单元中的去除特性 Authors:Li, Meng-Ya (1); Song, Yu-Ying (1); Zhang, Xiao-Lan (2); Huang, Hai-Ou (1) Author affiliation:(1) State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing; 100875, China; (2) Technology Institute of Beijing Waterworks Group Co., Ltd., Beijing; 100012, China Corresponding author:Huang, Hai-Ou(huanghaiou@bnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3348-3357 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Protein-like dissolved organic matter (pDOM), which is ubiquitous in natural waters, is a critical precursor of nitrogenous disinfection byproducts. Recently, the control and elimination of pDOM have been a growing concern during drinking water treatment processes. In this study, a high-performance size exclusion chromatography system coupled with photo-diode array, fluorescence detector, and online organic carbon detector (HPSEC-PDA/FLD/OCD) was used to determine the removal behaviors of different-sized pDOM from two full-scale drinking water treatment plants (DWTPs). Coagulation and activated carbon adsorption were selected for bench-scale experiments to further assess the removal behavior of pDOM during conventional water treatment processes. The results showed that different-sized pDOM fractions exhibited different removal characteristics. Pre-oxidation can effectively remove some tyrosine-like and tryptophan-like components with high MW, and as the oxidization effect was enhanced, more high MW fractions decomposed into low MW ones. Conversely, some aliphatic pDOM fractions in high MW (e.g., aliphatic proteins) were not subject to pre-oxidation removal. The coagulation-sedimentation unit was efficient in removing high MW fractions, specifically tryptophan-like fractions. Additionally, some pDOM components may be released during coagulation. pDOM with low MW and high hydrophobicity were easily removed during activated carbon filtration. However, long-term operation of the activated carbon filter may breed microorganisms, resulting in the partial release of pDOM fractions. Moreover, UV disinfection processes promoted the degradation of low MW pDOM components. Due to the complex water quality and uncontrollable microbial activities, the aforementioned water treatment units did not exhibit a synergistic effect on pDOM removal. In comparison with humic-like substances, pDOM was susceptible to water quality changes, and its removal was limited in the surveyed DWTPs. Therefore, DWTPs must strengthen pDOM monitoring in influent and effluent and adjust the operating parameters of different treatment units in a timely manner. Moreover, the combination of advanced water treatment processes, such as ozone-biological activated carbon process and nanofiltration, should also be considered to strictly control pDOM component removal.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Activated carbon treatment Controlled terms:Activated carbon - Air filters - Amino acids - Biogeochemistry - Chemical water treatment - Chemicals removal (water treatment) - Coagulation - Disinfection - Effluent treatment - Effluents - Fluorescence - Organic carbon - Ozone water treatment - Potable water - Proteins - Size exclusion chromatography - Water filtration - Water quality - Water treatment plants Uncontrolled terms:Activated carbon adsorption - Advanced water treatment process - Biological activated carbon - Conventional water treatment - Dissolved organic matters - Drinking water treatment process - High performance size exclusion chromatography - Nitrogenous disinfection by-products Classification code:444 Water Resources - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 451.2 Air Pollution Control - 452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 741.1 Light/Optics - 801 Chemistry - 801.2 Biochemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202010204 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404463 Title:Formation and Prevention of Secondary Nitrate in PM2.5 in Tianjin Title of translation:天津市PM2.5中二次硝酸盐形成及防控 Authors:Xiao, Zhi-Mei (1); Wu, Ting (2); Wei, Yu-Ting (3); Xu, Hong (1); Li, Li-Wei (1); Li, Peng (1); Chen, Kui (1); Deng, Xiao-Wen (1) Author affiliation:(1) Tianjin Eco-Environmental Monitoring Center, Tianjin; 300191, China; (2) Tianjin Ecological Environment Comprehensive Guarantee Center, Tianjin; 300191, China; (3) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300071, China Corresponding author:Deng, Xiao-Wen(dxwpp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2616-2625 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To study the formation and approaches to controlling secondary nitrate in PM2.5, the ionic compositions of PM2.5, pH of aerosols, variations in NH3-NH4+ and HNO3-NO3- concentrations, and the joint NH3/HNO3 sensitivity regime map of ammonium nitrate were investigated based on high-resolution online monitoring data for an urban site in central Tianjin from 2018 to 2019. The results showed that the average concentration of PM2.5 was 58μg•m-3, and the main ionic compositions of PM2.5 were nitrate (NO3-), ammonium (NH4+), sulfate (SO42-), Cl-, and K+with corresponding mass percentages of 18.4%, 11.6%, 10.3%, 3.3%, and 2.6%, respectively. Concentrations of PM2.5 and the main components were relatively high during the heating season and relatively low during the non-heating season. The aerosols were weakly acidity with an average pH of 5.21; pH was higher in spring and winter and lower in summer and autumn, and diurnal variations pH were lower in the morning (00:00-08:00) and slightly higher at other times. The concentrations of NH3(g) (gas NH3) and HNO3(g) (gas HNO3) were 16.7μg•m-3and 1.2μg•m-3, respectively. The concentrations of NH3(g) were relatively higher from April to September and lower from October to February of the following year. HNO3(g) concentrations did not show any clear monthly pattern. Except during the summer, NH3(g) concentrations were higher in the morning and evening, and HNO3(g) concentrations were higher during the day. No clear linear relationships were observed between the concentrations of NH3(g) and NH4+ nor the concentrations of HNO3(g) and NO3- at different pH levels. Higher concentrations of NO3- and NH4+ were observed in the morning and evening, while no linear relationships were observed between the pH and concentrations of NH3(g)-NH4+ and HNO3(g)-NO3-. The joint NH3/HNO3 sensitivity regime map showed that most of the points were located in the HNO3 sensitive region with some in the NH3 & HNO3 sensitive region. In spring, autumn, and winter, most of the points were located in the HNO3 sensitive region while in summer, a significant quantity of the points were located in the NH3 & HNO3 sensitive region. Therefore, the precursors of HNO3 (such as NOx) should be controlled in the spring, autumn, and winter, and attention should be given to the control of the precursors of HNO3 (NOx) and NH3 in the summer to effectively control nitrate and ammonium aerosols in PM2.5 in Tianjin.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Ammonia Controlled terms:Aerosols - Nitrates - Nitrogen oxides - Sensitivity analysis - Springs (components) - Sulfur compounds - Urban growth Uncontrolled terms:Ammonium nitrate - Average concentration - Diurnal variation - Ionic composition - Linear relationships - Online monitoring - Secondary nitrates - Sensitive regions Classification code:403.1 Urban Planning and Development - 601.2 Machine Components - 804.2 Inorganic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.03e+01%, Percentage 1.16e+01%, Percentage 1.84e+01%, Percentage 2.60e+00%, Percentage 3.30e+00% DOI:10.13227/j.hjkx.202010119 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404929 Title:Effects of Wheat Straw-derived Biochar Application on Soil Carbon Content Under Different Tillage Practices Title of translation:小麦秸秆生物质炭施用对不同耕作措施土壤碳含量变化的影响 Authors:Liu, Zhen-Jie (1, 2); Li, Peng-Fei (1, 2); Huang, Shi-Wei (1, 2); Jin, Xiang-Le (1, 2); Zhang, A-Feng (1, 2) Author affiliation:(1) College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China Corresponding author:Zhang, A-Feng(zhangafeng@nwafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3000-3009 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
This study intended to examine the influence of biochar application on soil carbon content under different tillage conditions. For this, an indoor incubation experiment was performed with treatments included wheat straw-derived biochar application (0, 5, and 20 g•kg-1) and soil with different tillage measures (ploughing and no-tillage). The effects of biochar addition on soil organic carbon (SOC), dissolved organic carbon (DOC), soil microbial biomass carbon (MBC), readily oxidized organic carbon (ROC), soil inorganic carbon (SIC), pH, water soluble calcium and magnesium, and soil CO2 emissions were analyzed. The results showed that: ① Compared with the control, the contents of SOC, ROC, DOC, and water soluble Ca and Mg increased by 20.3%-105.6%, 0.5%-36.0%, 0.8%-30.5%, 3.5%-42.3%, and 2.4%-75.2% in the no-tillage treatments, respectively; and the contents of SOC, ROC, DOC, water-soluble Ca and Mg increased by 29.2%-145.1%, 1.3%-63.9%, 2.4%-55.6%, 18.2%-89.8%, and 10.1%-150.5% in the ploughing treatment, respectively, under different dosage biochar amendments, and was enhanced with an increase in the biochar application amount. Cumulative CO2 emissions were highest with biochar amendment at 5 g•kg-1 under the no-tillage soil condition; however, this increased with an increase in the biochar amount in the ploughing treatment. At the end of incubation experiment, the soil MBC content increased by 35.5%-45.7% compared with the control treatment; however, there was no significant effect on soil pH and SIC between the treatments. ② Compared with the ploughing treatment, the cumulative CO2 emissions, SOC, ROC, DOC, MBC, and water-soluble Ca and Mg contents of the no tillage treatment increased by 34.2%-79.0%, 8.9%-45.5%, 28.2%-73.9%, 40.4%-78.4%, 0.2%-131.7%, 8.7%-39.8%, and 0.3%-61.0%, respectively, while soil pH and SIC decreased by 0.08-0.17 unit and 2.4%-13.9%, respectively, under the same biochar amendment treatments. Overall, the addition of biochar significantly increased soil organic carbon, active organic carbon, soil water soluble calcium and magnesium content, and soil cumulative CO2 emissions, but no significant effect was observed on soil inorganic carbon content.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Organic carbon Controlled terms:Agriculture - Calcium - Carbon dioxide - Magnesium - pH effects - Soil moisture - Straw Uncontrolled terms:Biochar amendments - Calcium and magnesiums - Control treatments - Dissolved organic carbon - Soil inorganic carbons - Soil microbial biomass carbons - Soil organic carbon - Tillage practices Classification code:483.1 Soils and Soil Mechanics - 549.2 Alkaline Earth Metals - 801.1 Chemistry, General - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes Numerical data indexing:Percentage 1.01e+01% to 1.50e+02%, Percentage 2.03e+01% to 1.06e+02%, Percentage 2.40e+00% to 1.39e+01%, Percentage 2.40e+00% to 7.52e+01%, Percentage 2.92e+01% to 1.45e+02%, Percentage 3.00e-01% to 6.10e+01%, Percentage 3.42e+01% to 7.90e+01%, Percentage 3.55e+01% to 4.57e+01% DOI:10.13227/j.hjkx.202010090 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582334 Title:Spatial Distribution Characteristics of Phosphorus Fractions and Release Risk in Sediments of Honghu International Importance Wetland Title of translation:洪湖国际重要湿地沉积物磷空间分布特征及释放风险 Authors:Liu, Yong-Jiu (1, 2); Huang, Su-Zhen (2, 3); Zhang, Lu (2); Peng, Xue (2, 3); Zhang, Xin-Yi (2, 3); Ge, Fang-Jie (2); Liu, Bi-Yun (2); Wu, Zhen-Bin (1, 2) Author affiliation:(1) School of Resource & Environmental Engineering, Wuhan University of Technology, Wuhan; 430070, China; (2) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan; 430072, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Liu, Bi-Yun(liuby@ihb.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3198-3205 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
According to a spatial distribution analysis of phosphorus in sediments from Honghu Wetland, it was found that TP content in sediments at the mouth of Honghu Lake was 781.31-1 955.84 mg•kg-1 and the average value was(1 287.21±437.28)mg•kg-1. TP content in sediments in the open water area was 438.33-1 554.04 mg•kg-1, with an average value of(718.10±238.15)mg•kg-1. The TP content of sediments in lake inlet was significantly higher than that of sediments in the open water area(P<0.05), and that in the enclosed aquaculture was higher than in the open water area, although no significant difference was observed (P>0.05). The TP content of sediments to the northwest and northeast of Honghu Lake was higher than that to the southwest of Honghu Lake, and the TP content of sediments in The Four-lake main canal was significantly higher than that of Luoshan main canal(P<0.05). The phosphorus input in the Four-lake main canal may be the main source of phosphorus in Honghu Lake sediments. The phosphorus fraction composition in sediments from different sampling sites were significantly different. Fe/Al-P and Ca-P were the main forms of phosphorus in sediments from the lake inlet, while OP and Ca-P were the main forms of phosphorus in sediments from the open water area. The variation in spatial phosphorus form composition was related to the influence of human activity and the distribution of aquatic plants. Fe/Al-P and OP contents were used to estimate the content of biological available phosphorus (BAP) in evaluated sediments, and the proportion of BAP in TP was used to estimate the risk of phosphorus release in Honghu sediments. BAP/TP was 39.8%-69%, with an average of(56.5±7.23)%, indicating a high risk of phosphorus release. OP and BAP were significantly correlated with TP in overlying water(P<0.01), and the correlation between BAP and phosphate in the overlying water was the highest. The results showed that phosphorus concentration in the overlying water may be related to the release of Fe/Al-P and OP into water bodies.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Lakes Controlled terms:Aluminum compounds - Calcium compounds - Hydraulic structures - Iron compounds - Phosphorus - Risk perception - Sediments - Spatial distribution - Wetlands Uncontrolled terms:Available phosphorus - Distribution characteristics - Human activities - Phosphorus concentration - Phosphorus fractions - Phosphorus inputs - Phosphorus release - Spatial distribution analysis Classification code:483 Soil Mechanics and Foundations - 804 Chemical Products Generally - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 3.98e+01% to 6.90e+01% DOI:10.13227/j.hjkx.202009090 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582289 Title:Effect of Ferric-carbon Micro-electrolysis on Greenhouse Gas Emissions from Constructed Wetlands Title of translation:铁碳微电解填料对人工湿地温室气体排放的影响 Authors:Zhao, Zhong-Jing (1); Hao, Qing-Ju (1, 2); Tu, Ting-Ting (1); Hu, Man-Li (1); Zhang, Yao-Yu (1); Jiang, Chang-Sheng (1, 2) Author affiliation:(1) State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, College of Resources and Environment, Southwest University, Chongqing; 400716, China; (2) Key Laboratory of Eco-environment in Three Gorges Reservoir Region, Ministry, Education, Chongqing; 400715, China Corresponding author:Jiang, Chang-Sheng(jiangcs@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3482-3493 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As the problem of global warming becomes increasingly serious, the greenhouse gas (GHG) emission reduction measures of constructed wetlands (CWs) have drawn significant attention. Ferric-carbon micro-electrolysis exhibits an excellent effect on wastewater purification as well as the potential to reduce GHG emissions. Therefore, to explore the impact of ferric-carbon micro-electrolysis on GHG emissions from intermittent aeration constructed wetlands, four kinds of different wetlands with different fillers were constructed. The four fillers were ferric-carbon micro-electrolysis filler+gravel (CW-Ⅰ), ferric-carbon micro-electrolysis filler+zeolite (CW-Ⅱ), zeolite (CW-Ⅲ), and gravel (CW-Ⅳ). Intermittent aeration technology was used to aerate the wetland systems. The results show that ferric-carbon micro-electrolysis significantly improved the nitrogen removal efficiency of the intermittent aeration constructed wetlands and reduced GHG emissions. Compared with CW-Ⅳ, the CH4 fluxes of CW-Ⅰ, CW-Ⅱ, and CW-Ⅲ decreased by 32.81% (P<0.05), 52.66% (P<0.05), and 54.50% (P<0.05), respectively. Among them, zeolite exhibited a stronger reduction effect on CH4 emissions in both the aeration and non-aeration sections. The ferric-carbon micro-electrolysis substantially reduced N2O emissions. In comparison with CW-Ⅳ, CW-, and CW-Ⅱ achieved N2O emission reduction by 30.29%-60.63% (P<0.05) and 43.10%-73.87% (P<0.05), respectively. During a typical hydraulic retention period, the comprehensive GWP caused by CH4 and N2O emitted by each group of wetland system are (85.21±6.48), (49.24±3.52), (127.97±11.44), and (137.13±11.45) g•m-2, respectively. The combined use of ferric-carbon micro-electrolysis and zeolite effectively reduces GHG emissions in constructed wetlands. Overall, ferric-carbon micro-electrolysis combined with zeolite (CW-Ⅱ) can be regarded as one of the valuable filler combination methods for constructed wetlands, which can ensure high removal efficiency of pollutants and effective GHG emission reduction in constructed wetlands.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Greenhouse gases Controlled terms:Carbon - Efficiency - Electrolysis - Emission control - Fillers - Gas emissions - Global warming - Gravel - Greenhouse effect - Nitrogen removal - Wetlands - Zeolites Uncontrolled terms:Constructed wetlands - Constructed wetlands (CWs) - Emission reduction - Hydraulic retention - Intermittent aeration - Nitrogen removal efficiency - Removal efficiencies - Wastewater purification Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 801.4.1 Electrochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering DOI:10.13227/j.hjkx.202011248 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110401328 Title:Effects of Roxithromycin on Reproduction, Growth, and Anti-oxidation System of Daphnia magna Title of translation:罗红霉素对大型溞生殖生长及抗氧化系统的影响 Authors:Zhang, Ling-Yu (1); Liu, Jian-Chao (1); Leng, Yang (2); Lu, Guang-Hua (1) Author affiliation:(1) Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing; 210098, China; (2) Safety Center for River and Lake Protection, Construction and Operation of Yangtze River Water Resources Commissions, Wuhan; 430010, China Corresponding author:Liu, Jian-Chao(jianchao-liu@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:3074-3083 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Roxithromycin (ROX) is widespread in the water environment and has been reported to have ecotoxicological effects on aquatic organisms. To improve our understanding of these effects, we selected Daphnia magna as a test organism to study acute and chronic ROX toxicity on reproduction, growth, and antioxidant systems. The acute ROX toxicity was low, with 48 h-LC50 and 96h-LC50ROX values of 60.26 mg•L-1 and 39.81 mg•L-1, respectively. Furthermore, ROX concentrations of 0.5 μg•L-1 and 50 μg•L-1 significantly increased the frequency of egg laying, total number of eggs, and number of eggs per fetus. In the early exposure stages, ROX altered the sexual maturation time of Daphnia magna, affecting the frequency of egg laying and the number of eggs per fetus to cope with environmental stress. The intrinsic growth rate was also significantly increased by 50 μg•L-1 ROX. In both treatment groups, Daphnia magna had a shorter body length, abnormal heart rate, and inhibited swimming activity. Moreover, 50 μg•L-1 ROX inhibited the activities of POD, CAT, and GSH-Px by approximately 50% and induced MDA by more than 100%, resulting in the accumulation of reactive oxygen species in the body, which could potentially damage the cell membrane. In the 50 μg•L-1 ROX treatment, per06 was up-regulated, enhancing the immune response of Daphnia magna. In contrast. gst and gst-theta were down-regulated, suggesting that ROX could weaken the detoxification effect of Daphnia magna. jhe, ecra, ecrb, rxr, vg1, vg2, and vit-2 were also down-regulated. ROX affected the secretion of juvenile and thyroid hormones, inhibiting the synthesis of vitellogenin. Finally, ROX also affected the growth and disturbed the population stability of Daphnia magna. This study provides a reference for the effects of ROX on the reproduction and growth of aquatic organisms and their responses at protein and gene levels.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Aquatic organisms Controlled terms:Cell proliferation - Cytology - Detoxification - Hormones - Population statistics - Toxicity Uncontrolled terms:Antioxidant systems - Ecotoxicological effects - Environmental stress - Immune response - Sexual maturation - Swimming activity - Thyroid hormones - Water environments Classification code:461 Bioengineering and Biology - 471 Marine Science and Oceanography Numerical data indexing:Mass_Density 3.98e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 6.03e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Percentage 5.00e+01% DOI:10.13227/j.hjkx.202012026 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582327 Title:Transmission of Coronavirus via Aerosols and Influence of Environmental Conditions on Its Transmission Title of translation:冠状病毒气溶胶传播及环境影响因素 Authors:Li, Xue (1); Jiang, Jing-Kun (1); Wang, Dong-Bin (1); Deng, Jian-Guo (1); He, Ke-Bin (1); Hao, Ji-Ming (1) Author affiliation:(1) State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China Corresponding author:Jiang, Jing-Kun(jiangjk@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3091-3098 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The COVID-19 pandemic has endangered human health and production since 2019. As an emerging disease caused by SARS-CoV-2, its potential transmissibility via aerosols has caused heated debate. This work summarizes the current research findings on virus aerosol generation, aerodynamic properties, and environmental influencing factors on their survivability in order to elucidate coronavirus transmission via aerosols. The occurrence and distinction of SARS-CoV-2, SARS-CoV-1, and MERS-CoV in real atmospheric environments are summarized. The deficiencies of existing research and directions for necessary future research on confirming the airborne transmission mechanism of coronavirus as well as the need for multidisciplinary research are discussed.
© 2021, Science Press. All right reserved. Number of references:60 Main heading:Transmissions Controlled terms:Aerosols - Diseases - Viruses Uncontrolled terms:Aerodynamic properties - Aerosol generation - Airborne transmission - Atmospheric environment - Coronaviruses - Emerging disease - Environmental conditions - Multi-disciplinary research Classification code:461.9 Biology - 602.2 Mechanical Transmissions DOI:10.13227/j.hjkx.202010033 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247450 Title:Chemical Characteristics and Source Apportionment of Organic Aerosols in Atmospheric PM2.5 in Winter in Beijing Title of translation:北京冬季PM2.5中有机气溶胶的化学特征和来源解析 Authors:Xu, Nan (1); Wang, Tian-Tian (1); Li, Xiao (1); Tang, Rong-Zhi (1); Guo, Song (1); Hu, Min (1) Author affiliation:(1) State Key Joint Laboratory of Environmental Simulation and Pollution Control, International Joint Laboratory for Regional Pollution Control, Ministry of Education, College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China Corresponding author:Hu, Min(minhu@pku.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2101-2109 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the concentrations, characteristics, and sources of organic aerosols in winter in Beijing, atmospheric fine particulate matter (PM2.5) samples were collected from November 10, 2016 to December 10, 2016. One hundred and twenty-nine particulate organic matters (POM) were quantified by gas chromatography-mass spectrometry, accounting for approximately 9.3%±1.2% of the total concentration of organic matter. The most abundant class was sugar, among which levoglucosan alone accounted for 18% of the quantified organic matter mass. The next most abundant classes were alkanoic acids, normal alkanes, dicarboxylic acids, and polycyclic aromatic hydrocarbons. The influence of winter heating and biomass burning emissions on organic aerosols in winter in Beijing was analyzed by the characteristics of the molecular markers in the POM. Compared with those during the non-heating period, the concentrations and proportions of hopane species, which are tracers for fossil fuels, increased in the organic matters during the heating period. Moreover, the influence of coal burning emissions on the distribution of hopane species was enhanced. The species with the maximum concentration and carbon predominance index in n-alkanes also reflected the influence of enhanced fossil fuel emissions. The results of the concentration-weighted trajectory model for levoglucosan, a tracer for biomass combustion, suggested that straw burning pollution in the surrounding areas of Beijing would affect the composition of organic aerosols in Beijing via airmass transport. A molecular marker-based chemical mass balance model was used to apportion the sources of organic carbon in the winter of 2016 in Beijing, and the results were compared with those of research in 2006 to quantify the changes in the source contributions over 10 years. The contribution of motor vehicles increased significantly in 2016 compared with that in 2006, whereas the contribution of coal burning and wood burning decreased to a large extent. The contribution of cooking emissions could not be ignored. Therefore, the control of motor vehicle and cooking emissions is of great importance to reduce the problem of PM2.5 pollution in winter in Beijing.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Particles (particulate matter) Controlled terms:Atmospheric aerosols - Atmospheric chemistry - Biogeochemistry - Coal combustion - Fossil fuels - Gas chromatography - Mass spectrometry - Organic carbon - Paraffins - Pollution control - Polycyclic aromatic hydrocarbons - Tracers Uncontrolled terms:Atmospheric fine particulate matter - Biomass burning emissions - Chemical characteristic - Chemical mass balance model - Fossil fuel emissions - Gas chromatography-mass spectrometry - Maximum concentrations - Particulate organic matters Classification code:443.1 Atmospheric Properties - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 801 Chemistry - 801.2 Biochemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Age 1.00e+01yr, Percentage 1.80e+01% DOI:10.13227/j.hjkx.202009241 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247418 Title:Spatial Differentiation of Soil Organic Carbon Density and Influencing Factors in Typical Croplands of China Title of translation:中国典型农田土壤有机碳密度的空间分异及影响因素 Authors:Li, Cheng (1, 2); Wang, Rang-Hui (2); Li, Zhao-Zhe (1); Xu, Yang (1) Author affiliation:(1) College of Horticulture and Plant Protection, Yangzhou University, Yangzhou; 225009, China; (2) Jiangsu Provincial Key Laboratory of Agricultural Meteorology, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Wang, Rang-Hui(rhwang@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2432-2439 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Cropland soil organic carbon density (SOCD) is an important indicator for measuring soil fertility and soil quality. To understand the spatial differentiation characteristics of cropland SOCD and its influencing factors across China, a dataset on the cropland SOCD of 19 typical stations during 2005-2015 was collected from the China Ecosystem Research Network. The geodetector method was used to analyze the influencing factors affecting the spatial patterns of cropland SOCD. The results indicated that the mean cropland SOCD ranged from 0.83 kg•m-2 to 4.97 kg•m-2 in different stations across China, and was higher in humid monsoon regions than in arid and semi-arid regions. Under different land use patterns, the SOCD of paddy fields was higher than that of other croplands and showed a tendency of significant increase from 2005 to 2015, reaching 0.13 kg•(m2•a)-1. The soil physical and chemical properties and precipitation were important influencing factors that affected the spatial patterns of cropland SOCD. In particular, the soil alkaline nitrogen content had the greatest impact on the cropland SOCD patterns. Furthermore, the interaction forces between the soil alkaline nitrogen content and latitude, soil type, precipitation, and soil pH were clearly strengthened. The findings can provide an important scientific basis for reducing cropland greenhouse gas emissions and increasing soil carbon sequestration across China.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Soils Controlled terms:Alkalinity - Forestry - Gas emissions - Greenhouse gases - Land use - Nitrogen - Organic carbon - Precipitation (chemical) Uncontrolled terms:Arid and semi-arid regions - Ecosystem research - Interaction forces - Scientific basis - Soil carbon sequestration - Soil organic carbon densities - Soil physical and chemical properties - Spatial differentiation Classification code:403 Urban and Regional Planning and Development - 451.1 Air Pollution Sources - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202010029 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779760 Title:Spatial Variation of Surface Ozone Concentration During the Warm Season and Its Meteorological Driving Factors in China Title of translation:中国暖季近地面臭氧浓度空间格局演变及主要气象驱动因素 Authors:He, Chao (1); Mu, Hang (1); Yang, Lu (1); Wang, Dan-Lu (2); Di, Yan-Feng (3); Ye, Zhi-Xiang (1); Yi, Jia-Hui (1); Ke, Bi-Qin (1); Tian, Ya (1); Hong, Song (1) Author affiliation:(1) School of Resources and Environmental Sciences, Wuhan University, Wuhan; 430079, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Environment and Resources, Guangxi Normal University, Guilin; 541006, China Corresponding author:Hong, Song(songhongpku@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4168-4179 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The concentration of surface ozone (O3) in China increased consistently from 2015 to 2018, and became an important air pollutant, followed by particulate matter. This study uses real-time O3 and meteorological data, obtained in 337 cities in China during the warm seasons (April to September) of 2015 to 2018, to determine the spatial variation of surface O3 and its meteorological driving factors in major cities in China, via trend analysis, spatial autocorrelation, hotspot analysis, and multi-scale geographically weighted regression (MGWR) modeling. The results show that: ① during the warm season, O3 concentrations showed a significant growth trend (P < 0.05), with an average growth rate of 0.28 μg•(m3•a)-1, while more than 55% of urban O3 concentrations increased by 0.50 μg•m-3 annually. ② There were significant regional differences in O3 concentration. High values (> 60 μg•m-3) were distributed over east China, north China, central China, and northwest China, while low values (< 20 μg•m-3) were distributed over south China and southwest China. ③ The spatial agglomeration of O3 concentration has been enhanced year by year, with hotspots mainly distributed over east China and central China. In contrast, there are cold spots in northeast China, southwest China, and southern China. ④Analysis of the MGWR model indicated that temperature, wind speed, cloud coverage, and precipitation all have a significant effect on the distribution of O3, although there are also discrepancies in driving factor priorities between the different regions. Temperature was the main meteorological driving factor of O3 variation during the warm season in China, and its impact on O3 concentration was significantly higher in north China, northwest China, and northeast China than in other regions; overall, there was a significant positive correlation between O3 concentration and temperature, except in Guangxi, Yunnan, and Jiangxi. O3 concentration was negatively correlated with wind speed in most regions of south China, east China, and central China, and positively correlated with wind speed in north China and northeast China. O3 concentration was significantly negatively correlated with cloud cover, except in Liaoning, Shandong, Hebei, Gansu, Guangdong, and some areas in southwest China. O3 concentration was significantly negatively correlated with precipitation, except in the northwest and southwest regions.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Air pollution Controlled terms:Factor analysis - Ozone - Precipitation (meteorology) - Scales (weighing instruments) - Urban growth - Wind Uncontrolled terms:Average growth rate - Geographically weighted regression - Meteorological data - Positive correlations - Regional differences - Spatial autocorrelations - Spatial variations - Surface ozone concentrations Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 443.3 Precipitation - 451 Air Pollution - 804 Chemical Products Generally - 922.2 Mathematical Statistics - 943.3 Special Purpose Instruments Numerical data indexing:Percentage 5.50e+01% DOI:10.13227/j.hjkx.202009228 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779584 Title:Indicator Function of Ragworm (Nereididae) on Sediment Microplastic in Haizhou Bay Intertidal Zone Title of translation:海州湾潮间带沙蚕对沉积物微塑料的指示作用 Authors:Wang, Jia-Xuan (1); Song, Ke-Xin (1); Sun, Yi-Xin (1); Fang, Tao (1, 2, 3); Li, Jin-Zhen (1); Zhang, Tao (1, 2, 3); Feng, Zhi-Hua (1, 2, 3) Author affiliation:(1) Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang; 222005, China; (2) Co-innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Qcean University, Lianyungang; 222005, China; (3) Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang; 222005, China Corresponding author:Feng, Zhi-Hua(fengzhihua@jou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4341-4349 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Sediment samples were collected from nine sites of three sections, in the intertidal zone of Haizhou bay in July 2018. The abundance and characteristics of microplastics in the sediments (and ragworms within the sediments) were then determined to identify the source of microplastics in ragworms, and to explore the effects of ragworms on microplastics in sediment. The average abundance of microplastics in tidal flat sediments was (0.49±0.17) n•g-1, which was at a high level in domestic offshore environmental studies. Among all the microplastics detected, the most common form and color were fiber and black-gray, respectively, and the materials were mainly polyethylene (PE), polyester (PET), and polystyrene (PS). The detection rate of microplastics in ragworm was 77.78%-86.67%, with an average abundance of (6.68±2.21) n•ind-1; the abundance was significantly correlated with individual mass (r=0.42, P=0.002). The microplastic abundance was significantly higher in ragworms with individual mass over 1.5 g than in those with a mass of< 0.5 g or 0.5-1 g (F3=141.029, P=0.000). In ragworms, microplastics were dominated by small black or blue fibers, and the main materials were PE and PET. By analyzing the various characteristics of microplastics with a particle size of 0-3 mm, it was found that the abundance of microplastics in sediments was strongly correlated with that in ragworms (r=0.79, P=0.01); the main form (r=0.90, P=0.035) and the material composition (r=0.73, P=0.024) also showed significant correlation between sediments and ragworms. This indicates that ragworms ingest microplastics in the sedimentary environment and exchange the microplastics with the sediments. Therefore, ragworms can be used as an indicator species of microplastic pollution in sediments.
© 2021, Science Press. All right reserved. Number of references:62 Main heading:Microplastic Controlled terms:Offshore oil well production - Particle size - Sediments Uncontrolled terms:Environmental studies - Indicator functions - Indicator species - Material compositions - Polyesters (PET) - Sediment samples - Sedimentary environment - Tidal flat sediment Classification code:483 Soil Mechanics and Foundations - 511.1 Oil Field Production Operations Numerical data indexing:Mass 1.50e-03kg, Mass 5.00e-04kg, Percentage 7.78e+01% to 8.67e+01%, Size 0.00e+00m to 3.00e-03m DOI:10.13227/j.hjkx.202012069 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804538 Title:Characteristics of Phosphorus Speciation and Genesis in Typical Tributaries of the Three Gorges Reservoir Title of translation:三峡水库典型支流磷素赋存形态特征及其成因 Authors:Yang, Fan (1); Wang, Li-Jing (2); Ji, Dao-Bin (1); Li, Hong (2); Li, Ying-Jie (2); Li, Xin (1); Xu, Yang (1); Tian, Pan (1); Wu, Ya-Ting (3) Author affiliation:(1) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Eco-Environment Research Center of Yangtze River Economic Belt, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Foreign Languages, China Three Gorges University, Yichang; 443002, China Corresponding authors:Wang, Li-Jing(wanglj@craes.org.cn); Ji, Dao-Bin(394816707@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:688-698 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A comparative analysis of phosphate occurrence and its genesis during different dispatching periods of representative level I tributaries of the Three Gorges Reservoir was conducted. For this, water quality, hydrodynamic force, and environmental data were examined for backwater areas of the Xiangxi River and Shennong River during the low-water-level period (June), storage period (September) and high-water-level period (December) in 2018. The results suggest that the mass concentration of total phosphorus (TP) in the water body of the coves of Xiangxi River and Shennong River range from 0.049 mg•L-1 to 0.168 mg•L-1 and 0.059 mg•L-1to 0.152 mg•L-1, respectively, surpassing the 0.02 mg•L-1 threshold for algal blooms. The mass concentration of TP, DP (orthophosphate), and PP (particulate phosphorus) in the coves of the tributaries were ranked as follows: storage period>high-water-level period>low-water-level period for TP; storage period>low-water-level period>high-water-level period for DP; low-water-level period>high-water-level period>storage period for PP. Based on Pearson's correlation coefficients, TP and DP were significantly correlated as well as temperature and pH, which are the key factors influencing the phosphorus in soils and sediments in the water-level-fluctuation zone. During the low-water-level and high-water-level periods of the Three Gorges Reservoir, the TP in the coves of the tributaries mainly exists as PP, accounting for more than 75% and 60%, respectively. The flow in the coves of the tributaries slows during storage periods, meaning that settlement of PP is enhanced, changing the dominance of TP to dissolved total phosphorus (DTP).
© 2021, Science Press. All right reserved. Number of references:58 Main heading:Reservoirs (water) Controlled terms:Correlation methods - Digital storage - Phosphorus - Rivers - Sediments - Water levels - Water quality Uncontrolled terms:Comparative analysis - Hydrodynamic forces - Particulate phosphorus - Pearson's correlation coefficients - Phosphorus speciation - Soils and sediments - Three gorges reservoir - Water-level-fluctuation zones Classification code:441.2 Reservoirs - 445.2 Water Analysis - 483 Soil Mechanics and Foundations - 722.1 Data Storage, Equipment and Techniques - 804 Chemical Products Generally - 922.2 Mathematical Statistics Numerical data indexing:Mass_Density 2.00e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 4.90e-05kg/m3 to 1.68e-04kg/m3, Mass_Density 5.90e-05kg/m3 to 2.20e-02kg/m3, Percentage 6.00e+01%, Percentage 7.50e+01% DOI:10.13227/j.hjkx.202007095 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804518 Title:Characteristics of Cadmium Enrichment and Pollution Evaluation of a Soil-Crop System in a Typical Karst Area Title of translation:典型喀斯特地区土壤-作物系统镉的富集特征与污染评价 Authors:Wang, Rui (1, 2); Deng, Hai (1, 2); Jia, Zhong-Min (1); Yan, Ming-Shu (1, 2); Zhou, Jiao (1, 2); Dong, Jin-Xiu (1, 2); Wang, Jia-Bin (1, 2); Yu, Fei (1, 2) Author affiliation:(1) Southeast Sichuan Geological Group, Chongqing Bureau of Geology and Minerals Exploration, Chongqing; 400038, China; (2) Chongqing Key Laboratory of Land Quality Geological Survey, Chongqing; 400038, China Corresponding author:Jia, Zhong-Min(zhongminjia@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:941-951 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to study the characteristics and factors influencing Cd accumulation in surface soils and crops in karst areas, and to provide a theoretical basis for safe land use, 360 surface soil samples, 7 deep soil samples, and 85 rice samples were collected from central Qianjiang District, Chongqing. The samples and 73 corn samples (corresponding to root-zone soil samples), were analysed to determine the content of Cd, TFe2O3, Mn, organic matter (Corg), Se, and pH. Based on geostatistical analyses, the spatial distribution and Cd enrichment of the surface soils were determined and a safety evaluation for the soil and crops was carried out. The results showed that the spatial distribution of Cd in the surface soil was uneven, with the surface layer showing significant enrichment. This pattern was controlled by the soil parent material and human activities. The enrichment of surface layer was mainly affected by iron manganese oxides and organic matter (Corg). Soil Cd was mainly found at 'non-polluted' and 'lightly polluted' levels, although some areas present strong ecological risks. The main contaminated area occurs in association with Permian strata, demonstrating a geological control on soil Cd pollution. Slight-to-severe Cd pollution was identified in bulk crops; the recommended daily consumption limit for rice is 0.87 kg•d-1 and corn is 1.53 kg•d-1. The bioavailability of Cd is affected by soil pH and Se content. Under acidic conditions, Cd bioavailability is high, and crops in areas with high soil Se are safer. It is recommended that crops with low Cd accumulation are planted in the Permian outcrop area of Shuitian Township, or alternatively, soil pH should be adjusted to control the risk of Cd pollution and ensure safe land use. In addition, planting crops in areas with high soil Se content is preferable.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Soil pollution control Controlled terms:Biogeochemistry - Cadmium - Crops - Iron oxides - Land use - Manganese oxide - Organic compounds - Selenium - Soil pollution - Soil surveys - Soils - Spatial distribution Uncontrolled terms:Acidic conditions - Contaminated areas - Geological control - Geostatistical analysis - Iron manganese oxide - Pollution evaluation - Safety evaluations - Typical karst area Classification code:403 Urban and Regional Planning and Development - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 821.4 Agricultural Products - 921 Mathematics DOI:10.13227/j.hjkx.202008085 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804521 Title:Cadmium Accumulation Characteristics of Four Herbs Title of translation:4种草本植物对镉的富集特征 Authors:Chen, Di (1, 2); Li, Bo-Qun (1); Yang, Yong-Ping (1); He, Zhao-Rong (2); Li, Xiong (1) Author affiliation:(1) Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming; 650201, China; (2) School of Life Sciences, Yunnan University, Kunming; 650091, China Corresponding author:Li, Xiong(lixiong@mail.kib.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:960-966 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A pot-based experiment was conducted to study the Cd tolerance and accumulation characteristics of four invasive herbs (Galinsoga quadriradiata, Panicum dichotomiflorum, Setaria geniculata, and Lolium persicum) under exposures of 0 (T0), 5 (T5), 25 (T25), and 50 mg•kg-1 (T50) soil Cd concentrations to screen for potential Cd accumulators for phytoremediation. The results showed that the biomasses of both shoots and roots of G. quadriradiata had no significant changes compared to the control (T0) samples under all Cd treatments, whereas the biomass of the other three Poaceae species significantly decreased under the T25 or T50 treatment. The results indicate that G. quadriradiata had stronger Cd tolerance than the other three species. The Cd concentrations in the shoots and roots of the four herbs significantly increased with an increase in soil Cd concentrations, but the shoot bioconcentration factors (SBCF) of the four plant species significantly decreased under T5, T25, and T50 treatment. The SBCF of G. quadriradiata and P. dichotomiflorum were greater than 1 whereas those of S. geniculata and L. persicum were lower than 1. The translocation factors (TF) of G. quadriradiata were 0.93, 0.73, and 1.04 under T5, T25, and T50 treatment, respectively, which were significantly higher than those of the other three plants under the same soil Cd concentration. In addition, both the total Cd and shoot Cd contents of G. quadriradiata were notably higher than in the other three species under the same Cd treatment. Moreover, 90% of the Cd in G. quadriradiata could be transferred aboveground, which was significantly higher than for the other three plants. Based on our comprehensive comparison of Cd tolerance and accumulation capacity, we suggest that G. quadriradiata is a high-Cd accumulator with considerable phytoremediation potential.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Cadmium Controlled terms:Bioaccumulation - Bioremediation - Soil pollution - Soils Uncontrolled terms:Accumulation characteristics - Bio-concentration factors - Cd concentrations - Comprehensive comparisons - Phytoremediation - Phytoremediation potentials - Plant species - Translocation factor Classification code:454.2 Environmental Impact and Protection - 461.9 Biology - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals Numerical data indexing:Percentage 9.00e+01% DOI:10.13227/j.hjkx.202007034 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779806 Title:Distribution Characteristics and Seasonal Variations of Arsenic in Atmospheric Aerosols over the Yellow Sea and Bohai Sea Title of translation:黄渤海气溶胶中砷的分布特征和季节变化 Authors:Yuan, Shuai (1, 2); Wang, Yan (1, 2); Liu, Ru-Hai (1, 2); Chong, Xi-Xi (1, 2); Liu, Xiao-Yu (1, 2); Shao, Long (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (2) Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China Corresponding author:Liu, Ru-Hai(ruhai@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4151-4157 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Marine aerosol samples of total suspended particulates (TSP) were collected in winter (2017) and spring and summer (2018) over the Yellow Sea and Bohai Sea. These samples were analyzed for total arsenic (As), As(Ⅴ) and As(Ⅲ), and water soluble ions to investigate the distribution and seasonal variation of As in atmospheric aerosols, as well as the dry deposition flux. Results showed that As concentrations in winter, spring, and summer were 6.6, 5.5, and 4.4 ng•m-3, respectively. The highest As concentrations occurred in the winter. Obvious differences in the spatial distribution of As were observed in different seasons. The highest concentrations of As were observed over the Bohai Sea in winter and the northern Yellow Sea in spring, with an average of 8.8 and 11.3 ng•m-3, respectively. As concentrations exhibited a relatively uniform spatial pattern in summer over the Yellow Sea and Bohai Sea, which may have been affected by the different sources of As. As(Ⅴ) was the main species of As, while As(Ⅴ)/As(Ⅲ) ratios were 0.41 in winter and 0.21 in summer, respectively. Average As/TSP ratios in the winter, spring, and autumn were 95.4, 83.9, and 81.4 μg•g-1, respectively. Obviously higher As/TSP ratios, indicating higher intensity, occurred in winter. Air masses carry pollutants released over the Bohai Rim Region by the winter monsoon, resulting in higher As concentrations in winter. In summer, As concentrations are also higher, because air masses bring pollutants to the southeast coastal economic zone via the northeast monsoon. In spring, most air masses arriving in this region originate from Siberia and the southeast ocean with high rate, resulting in lower As concentrations. The significant correlation between K+/TSP and As/TSP (r=0.78, P< 0.05) in winter indicates that As is affected by the combustion of land biomass. No significant correlation in summer reveals the difference in As sources between winter and summer. The dry deposition flux of As over the Yellow Sea and Bohai Sea was 1.15 μg•(m2•d)-1 in winter, 0.77 μg•(m2•d)-1 in spring, and 0.97 μg•(m2•d)-1 in summer, with an annual mean value of 0.95 μg•(m2•d)-1.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Atmospheric aerosols Controlled terms:Arsenic - Atmospheric thermodynamics - Deposition - Pollution - Springs (components) Uncontrolled terms:Distribution characteristics - Dry deposition fluxes - Northeast monsoon - Northern Yellow Sea - Seasonal variation - Spatial patterns - Total suspended particulates - Water-soluble ions Classification code:443.1 Atmospheric Properties - 601.2 Machine Components - 802.3 Chemical Operations - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202102106 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688853 Title:Combined Use of Zirconium-Modified Bentonite Capping and Calcium Nitrate Addition to Control the Release of Phosphorus from Sediments Title of translation:硝酸钙添加和锆改性膨润土覆盖联用控制底泥中磷释放的效果及机制 Authors:Zhang, Hong-Hua (1); Lin, Jian-Wei (2); Zhan, Yan-Hui (2); Yu, Yang (2); Zhang, Zhi-Bin (3) Author affiliation:(1) Center for Membrane and Water Science & Technology, Zhejiang University of Technology, Hangzhou; 310032, China; (2) College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai; 201306, China; (3) College of Municipal and Environmental Engineering, Shandong Jianzhu University, Ji'nan; 250101, China Corresponding author:Lin, Jian-Wei(jwlin@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:305-314 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, sediment incubation experiments were carried out to investigate the efficiency and mechanism of the control of phosphorus (P) release from sediments. The results showed that under anoxic conditions, P could be released from the sediment into the pore water first and then the dissolved P in the pore water could be transported into the overlying water, leading to high concentrations of soluble reactive P (SRP) and diffusive gradient in thin-films (DGT)-labile P in the overlying water. However, the combined use of calcium nitrate (CN) addition and zirconium-modified bentonite (ZB) capping could effectively control the release of P from sediment, resulting in the low concentrations of SRP and DGT-labile P in the overlying water. Furthermore, the combined use of CN addition and ZB capping could significantly decrease the concentrations of SRP and DGT-labile P in the sediment. In addition, the combined utilization of CN addition and ZB capping also could result in a reduction of redox sensitive P (BD-P) in the uppermost sediment layer. The reduction of pore water SRP, DGT-labile P, and BD-P in sediment solids is of great importance to the control of sediment-P liberation by the combined use of CN addition and ZB capping. The reduction efficiency of overlying water SRP by combined CN addition/ZB capping technology was higher than that of single CN addition technology. Compared to that of single CN addition technology, the reduction efficiencies of pore water SRP, SRP diffusion flux across the sediment/overlying water interface (SWI), and BD-P in the sediment by the combined use of CN addition and ZB capping were also higher. The combined technology based on CN addition and ZB capping had a higher reduction efficiency of overlying water SRP during the late stage of sediment remediation than the single technology based on ZB capping, and the former had higher reduction efficiencies of pore water SRP, DGT-labile P, and SRP diffusion flux across the SWI and apparent P diffusion flux through the SWI than the latter. The results of this work indicate that the combined use of CN addition and ZB capping is a very promising method for the control of P release from sediments.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Sediments Controlled terms:Bentonite - Calcium compounds - Diffusion - Efficiency - Nitrates - Phosphorus - Water - Zirconium Uncontrolled terms:Combined technology - Diffusive gradients - Low concentrations - Modified bentonites - Reduction efficiency - Sediment incubations - Sediment remediation - Soluble reactive P Classification code:482.2 Minerals - 483 Soil Mechanics and Foundations - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering DOI:10.13227/j.hjkx.202006138 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247559 Title:Structural Characteristics of Zooplankton and Phytoplankton Communities and Its Relationship with Environmental Factors in a Typical Tributary Reservoir in the Three Gorges Reservoir Region Title of translation:三峡库区典型支流水库浮游动植物群落结构特征及其与环境因子的关系 Authors:Chen, Sha (1); Xie, Qing (1); Fu, Mei (2); Jiang, Tao (1); Wang, Yong-Min (1); Wang, Ding-Yong (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Key Laboratory of Freshwater Fish Reproductive and Development, Ministry of Education, College of Fisheries, Southwest University, Chongqing; 400715, China Corresponding author:Wang, Yong-Min(wangym540@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2303-2312 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Based on the data of zooplankton, phytoplankton, and water environmental factors in different seasons in a typical tributary reservoir in the Three Gorges Reservoir Region (Changshou Lake), this study explored the relationships between the structures of the zooplankton and phytoplankton communities and environmental factors using Pearson correlation analysis. The results showed that there were a total of 107 species of 8 phyla of phytoplankton, and cyanobacteria was the most critical constituent with a relative abundance of 61%. The dominant populations included Phormidium tenue, Merismopedia punctata, and Anabaena oscillarioides. A total of 82 species of 4 phyla of zooplankton were identified, and rotifers was the most abundant with a relative abundance of 88%. The dominant populations included six species, such as Keratella cochlearis, Asplanchna priodonta, and Asplanchna girodi. The spatial differences in the abundances, biomass, and biodiversity indexes of zooplankton and phytoplankton were not significant, whereas the seasonal differences in all the other indexes were significant, except for the zooplankton biodiversity indexes. The abundance of phytoplankton was the highest in summer, followed by spring, and it was the lowest in winter. The maximum abundance of zooplankton occurred in spring, and the biomass of zooplankton and phytoplankton in spring was significantly higher than that in winter. The number of phytoplankton species and the Shannon-Wiener index, Pielou's uniformity index, and Margalef richness index in summer were significantly lower than those in winter and spring. The water quality evaluation showed that Changshou Lake was in a clean to oligo-pollution state in winter and spring and a moderate-pollution state in summer, thereby suggesting that Changshou Lake was in an overall eutrophic state. The environmental factors, including Chla, DOC, nutrients (TP, NO2--N, NO3--N, and NH4+-N), DO, Eh, and T, influenced the structures of the zooplankton and phytoplankton communities in Changshou Lake, and there were seasonal differences in the environmental factors.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Plankton Controlled terms:Biodiversity - Correlation methods - Lake pollution - Lakes - Phytoplankton - Quality control - Reservoirs (water) - Springs (components) - Water quality Uncontrolled terms:Biodiversity indexes - Environmental factors - Pearson correlation analysis - Phytoplankton community - Phytoplankton species - Structural characteristics - Three Gorges Reservoir region - Water quality evaluation Classification code:441.2 Reservoirs - 445.2 Water Analysis - 453 Water Pollution - 454 Environmental Engineering - 471 Marine Science and Oceanography - 601.2 Machine Components - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics Numerical data indexing:Percentage 6.10e+01%, Percentage 8.80e+01% DOI:10.13227/j.hjkx.202008263 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582316 Title:Effects of Water and Fertilization Management on CH4 and N2O Emissions in Double-rice Paddy Fields in Tropical Regions Title of translation:水肥管理对热带地区双季稻田CH4和N2O排放的影响 Authors:Li, Jin-Qiu (1); Shao, Xiao-Hui (1); Gou, Guang-Lin (1); Deng, Yi-Xin (1); Tan, Shi-Min (1); Xu, Wen-Xian (2); Yang, Qiu (2); Liu, Wen-Jie (2); Wu, Yan-Zheng (1); Meng, Lei (1); Tang, Shui-Rong (1) Author affiliation:(1) College of Tropical Crops, Hainan University, Haikou; 570228, China; (2) College of Ecology and Environment, Hainan University, Haikou; 570228, China Corresponding author:Tang, Shui-Rong(tangshuirong@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3458-3471 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Paddy soils are widely considered a main source of methane (CH4) and nitrous oxide (N2O). Comprehensively evaluating CH4 and N2O emissions from double-rice systems in tropical regions with different water irrigation and fertilizer applications is of great significance for addressing greenhouse gas emissions from such systems in China. In this study, eight treatments were evaluated: conventional irrigation-PK fertilizer (D-PK), conventional irrigation-NPK fertilizer (D-NPK), conventional irrigation-NPK+organic fertilizer (D-NPK+M), conventional irrigation-organic fertilizer (D-M), continuous flooding-PK fertilizer (F-PK), continuous flooding-NPK fertilizer (F-NPK), continuous flooding-NPK+organic fertilizer (F-NPK+M), and continuous flooding-organic fertilizer (F-M). CH4 and N2O emissions in double-rice fields in tropical region of china were monitored in situ by closed static chamber-chromatography method and crop yields as well as global warming potential (GWP) and greenhouse gas intensity (GHGI) were determined. The results show that: ① The cumulative CH4 emissions from early rice and late rice are 10.3-78.9 kg•hm-2and 84.6-185.5 kg•hm-2, respectively. Compared with F-PK and F-NPK treatments, F-NPK+M and F-M treatments significantly increased the cumulative emissions of CH4 from early rice season. Under the same fertilizer conditions, the cumulative CH4 emissions under continuous flooding condition were significantly higher than that under conventional irrigation condition. Irrigation and fertilization had extremely significant effects on CH4 emission in the early rice season. ② The cumulative N2O emissions across all treatments were 0.18-0.76 kg•hm-2 in early rice season and 0.15-0.58 kg•hm-2in late rice season, respectively. During early rice season, compared with F-PK, F-NPK significantly increased the cumulative N2O emission; however, compared with D-PK, D-NPK, D-NPK+M, and D-M treatments significantly increased the cumulative N2O emissions. Compared with F-PK, other three treatments under continuous flooding condition significantly increased N2O cumulative emission in late rice season; compared with D-PK, D-NPK, and D-M treatment significantly increased the cumulative N2O emission. Irrigation and fertilization had significant impacts on N2O emissions in late rice season, and fertilization had significant impacts on N2O emission in early rice season. ③ Early and late rice yields were 7 310.7-9 402.4 kg•hm-2 and 3 902.8-7 354.6 kg•hm-2, respectively. Early rice yields in both F-NPK and F-M treatments were significantly higher than those in F-PK, D-PK, and D-NPK treatments. Compared with PK, the other three fertilization treatments under the same irrigation condition significantly increased late rice yield. The GWP and GHGI in early rice season were 580.8-2 818.5 kg•hm-2and 0.08-0.30 kg•kg-1, respectively. There was no significant difference in GWP among four fertilizer treatments under conventional irrigation condition in the early rice season. However, F-NPK+M and F-M treatments had a significant increase in GWP compared with F-PK. The GHGI in F-NPK+M and F-M treatments were significantly higher than that in other treatments. The GWP and GHGI in late rice season were 3 091.6-6 334.2 kg•hm-2 and 0.50-1.23 kg•kg-1, respectively. Irrigation significantly affected GWP and GHGI in both early and late rice seasons but fertilization had no significant impact on GWP and GHGI in late rice season. ④ Correlation analysis results showed that soil NH4+-N content and soil temperature below 5 cm soil layer had an extremely significant negative correlation with CH4 emissions. Soil pH was extremely significant positive correlated with CH4 emissions but significantly negatively correlated with N2O emission. Soil NH4+-N and NO3--N concentrations were extremely significantly negatively correlated with N2O emission. Given crop yield, GWP, GHGI, and D-NPK+M can be recommended for local water and fertilizer management to reduce greenhouse gas emissions while maintaining rice yields.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:Soil pollution Controlled terms:Crops - Fertilizers - Floods - Gas chromatography - Gas emissions - Global warming - Greenhouse gases - Irrigation - Nitrogen oxides - Soils - Tropical engineering - Tropics Uncontrolled terms:Correlation analysis - Cumulative emissions - Fertilizer management - Global warming potential - Irrigation and fertilizers - Negative correlation - Organic fertilizers - Tropical regions Classification code:443 Meteorology - 443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.3 Agricultural Methods - 821.4 Agricultural Products Numerical data indexing:Size 5.00e-02m DOI:10.13227/j.hjkx.202011181 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247540 Title:Spatial Distribution Characteristics, Source Apportionment, and Risk Assessment of Topsoil PAHs in the Core Area of the Ningdong Energy and Chemical Industry Base Title of translation:宁东能源化工基地核心区表层土壤中多环芳烃的空间分布特征,源解析及风险评价 Authors:Yang, Fan (1); Luo, Hong-Xue (1); Zhong, Yan-Xia (1, 2, 3); Wang, You-Qi (1); Bai, Yi-Ru (1) Author affiliation:(1) College of Ecology and Environment, Ningxia University, Yinchuan; 750021, China; (2) Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan; 750021, China; (3) Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China, Ministry of Education, Ningxia University, Yinchuan; 750021, China Corresponding author:Zhong, Yan-Xia(zhongyx_w@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2490-2501 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to evaluate the pollution of polycyclic aromatic hydrocarbons (PAHs) in the topsoil of the core area of the Ningdong Energy and Chemical Industry Base, 146 representative topsoil samples were collected using the grid method and the contents of 16 priority PAHs were analyzed. The results showed that the content of ∑PAHs in topsoil ranged from ND to 123.12 mg•kg-1 with an average of 10.19 mg•kg-1. There were three high PAHs distribution areas in the northwest, southwest, and east of the core area. The source apportionment showed that the sources of PAHs in the Ningdong base were complex, and the main pollution sources were petroleum, coal combustion, traffic, and gasoline, which contributed 39.4%, 33.3%, 19.2%, and 8.1% to the total PAHs sources, respectively. The ecological risk assessment of the quality basis and quality standard method showed that the ecological impact of PAHs in the core area was slight and the possibility of negative ecological effects was low. The results of the health risk assessment showed that the order of exposure of the topsoil PAHs was skin contact>swallowing>respiratory inhalation, and the topsoil PAHs in the core area of the Ningdong base posed no potential carcinogenic risk to people of different ages.
© 2021, Science Press. All right reserved. Number of references:37 Main heading:Polycyclic aromatic hydrocarbons Controlled terms:Chemical analysis - Chemical industry - Coal combustion - Gasoline - Health risks - Pollution - Risk assessment Uncontrolled terms:Carcinogenic risk - Distribution characteristics - Ecological impacts - Ecological risk assessment - Energy and chemical industries - Pollution sources - Polycyclic aromatic hydrocarbons (PAHS) - Source apportionment Classification code:461.7 Health Care - 521 Fuel Combustion and Flame Research - 523 Liquid Fuels - 524 Solid Fuels - 804.1 Organic Compounds - 805 Chemical Engineering, General - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.92e+01%, Percentage 3.33e+01%, Percentage 3.94e+01% DOI:10.13227/j.hjkx.202009096 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126238 Title:Structure Characteristics and Driving Variables of Epilithic Algae Community in Lhasa River Basin of Qinghai-Tibet Plateau Title of translation:青藏高原拉萨河流域附石藻类群落结构特征及其驱动因子分析 Authors:Wei, Jun-Wei (1, 2); Li, Hong-Ran (3, 4); Wang, Xing-Zhong (5); Qi, Wen-Hua (3, 4); Wang, Yang (3, 4); Zhao, Bin-Jie (3, 4); Tan, Xiang (3); Zhang, Quan-Fa (3) Author affiliation:(1) Research Center for Ecology and Environment of Qinghai-Tibetan Plateau, Tibet University, Lhasa; 850000, China; (2) College of Science, Tibet University, Lhasa; 850000, China; (3) Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan; 430074, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China; (5) Zhejiang Provincial Key Laboratory of Aquatic Resources Conservation and Development, Huzhou Normal University, Huzhou; 313000, China Corresponding author:Tan, Xiang(xtan@wbgcas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1879-1888 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the characteristics and driving factors of the epilithic algae community in the middle and lower reaches of the Lhasa River, epilithic algae was collected and identified in September 2019, the species composition and spatial distribution were analyzed, and the key environmental factors affecting the epilithic algae community were identified through redundancy analysis. The results indicated that 31 genera of epilithic algae belonging to six phyla were identified, and the average cell density of the epilithic algae was 1.92×106 cells•m-2. The number of species and cell density of the diatom phylum were the largest at each sampling point. The species number and cell density of the epilithic algae were significantly different between the main stream and tributaries. The main stream and tributaries contained relatively small differences in the dominant algae genera, which were Gomphonema, Fragilaria, Cymbella, and Planktolyngbya in the main stream and Gomphonema, Fragilaria, Cymbella, and Oscillatoria in the tributaries. The redundancy analysis revealed that temperature, pH, and dissolved oxygen were the main driving factors affecting the community structure of the dominant genus in the main stream, while HCO3- and flow velocity controlled the community structure of the dominant genus in the tributaries. This study provides basic data and the theoretical basis for the conservation of aquatic ecosystems and water quality management in the middle and lower reaches of the Lhasa River.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:Algae Controlled terms:Aquatic ecosystems - Cells - Cytology - Dissolved oxygen - Factor analysis - Flow velocity - Redundancy - Rivers - Water conservation - Water management - Water quality Uncontrolled terms:Community structures - Driving variables - Environmental factors - Lhasa River basins - Qinghai Tibet plateau - Redundancy analysis - Species composition - Structure characteristic Classification code:444 Water Resources - 445.2 Water Analysis - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 631 Fluid Flow - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202008142 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688827 Title:Seasonal Variation of DOM Spectral Characteristics of Rivers with Different Urbanization Levels in the Three Gorges Reservoir Area Title of translation:三峡库区城镇化影响下河流DOM光谱特征季节变化 Authors:Chen, Zhao-Yu (1, 2); Li, Si-Yue (1) Author affiliation:(1) Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Li, Si-Yue(syli2006@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:195-203 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The urbanization process of the Three Gorges Reservoir area (TGRA) shows important impacts on the formation, migration, and transportation of dissolved organic matter (DOM) in rivers. In this study, a high-urbanized river (Taohuaxi) and low-urbanized river (Pulihe) in the TGRA were selected and water samples were collected in spring (April) and summer (August) to analyze the seasonal and spatial characteristics of DOM in the rivers using UV-Vis absorption spectroscopy and three-dimensional fluorescence spectroscopy. The DOC, S275-295 (the spectral slope of the short wavelength range), SR (spectral slope ratio), BIX (recent autochthonous contribution), and Fn(280) (relative importance of protein-like substances) of the Taohuaxi and Pulihe Rivers were higher in summer (August) than in spring (April), and CDOM concentration, CDOM/DOC, SUVA254 (aromatic structure), SUVA260 (hydrophobic component), E3/E4 (proportion of fulvic acid), S350-400 (the spectral slope of the long wavelength range), and HIX (the degree of humification) were higher in spring than in summer. The overall averages of the DOC, CDOM concentration, SR, Fn (280), BIX, and FI were higher in the high-urbanized Taohuaxi River than the low-urbanized Pulihe River, whilst the CDOM/DOC, SUVA254, and SUVA260 were lower in the Taohuaxi River. With the increase of urbanization along the water flow pathways, SUVA254 and SUVA260 gradually decreased, while Fn (280) gradually increased. The humus source (FI) of the two rivers in spring and summer is mixed and includes terrigenous and biological sources (plankton and algae) but is mostly endogenous. Furthermore, DOM is characterized by a moderately recent autochthonous contribution. Our study implies a large impact of urbanization on the composition and sources of DOM.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Rivers Controlled terms:Absorption spectroscopy - Flow of water - Fluorescence spectroscopy - Reservoirs (water) - Soils - Springs (components) - Ultraviolet spectroscopy - Urban growth - Water absorption Uncontrolled terms:Dissolved organic matters - Hydrophobic components - Spatial characteristics - Spectral characteristics - Three gorges reservoir area - Three Gorges Reservoir Area(TGRA) - Three-dimensional fluorescence spectroscopies - UV-Vis absorption spectroscopy Classification code:403.1 Urban Planning and Development - 441.2 Reservoirs - 483.1 Soils and Soil Mechanics - 601.2 Machine Components - 631.1.1 Liquid Dynamics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations DOI:10.13227/j.hjkx.202004201 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582399 Title:Simultaneous Immobilization of Arsenic, Lead, and Cadmium in Paddy Soils Using Two Iron-based Materials Title of translation:两种铁基材料对污染农田土壤砷,铅,镉的钝化修复 Authors:Yuan, Feng (1, 2); Tang, Xian-Jin (3); Wu, Ji-Zi (1, 2); Zhao, Ke-Li (1, 2); Ye, Zheng-Qian (1, 2) Author affiliation:(1) Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Lin'an; 311300, China; (2) College of Environmental and Resource Sciences, Zhejiang A&F University, Lin'an; 311300, China; (3) Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou; 310058, China Corresponding author:Zhao, Ke-Li(kelizhao@zafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3535-3548 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Two iron-based materials, Fe-Ca composite (FeCa) and Fe-Mn binary oxide (FMBO), were applied to immobilize As, Pb, and Cd in heavy metal contaminated paddy soils. Seven kinds of paddy soil (tidal soil) contaminated by arsenic, lead and cadmium were collected from Shangyu, Shaoxing (SY), Foshan, Guangdong (FS), Shaoguan, Guangdong (SG), LiuYang, Hunan (LY), Ganzhou, Jiangxi (GZ), Dushan, Guizhou (DS), and Ma'anshan, Anhui (MAS). The effects of iron-based materials on the dynamic changes of As, Pb, and Cd concentration in soil solution, the stabilization efficacy of available As, Pb, and Cd in soil, and the effects of soil types and properties on stabilization efficacy were studied through soil incubation experiment. The results showed that the content of soil dissolved As, Pb, and Cd were lower in iron-based material treatments than in control throughout the incubation. The addition of two iron-based materials significantly reduced the availability of Cd, Pb, and As. Moreover, the stabilization efficiency of FeCa for As was higher than FMBO, but no significant difference was found in the stabilization efficiency of Pb and Cd between two materials. The stabilization efficiency of As, Pb, and Cd in FeCa treatments could be ordered as GZ>SG>DS and MAS; FS>SY, LY, and SG>MAS; SY, GZ, and DS>MAS, respectively. While the stabilization efficiency for As, Pb, and Cd in FMBO could be ordered as SY, LY, and GZ>DS>FS; FS>GZ>SY; DS>LY>MAS, respectively. In addition, the statistical results showed that the stabilization efficiencies of various soils under the treatment of iron-based materials were significantly correlated with sand content (negatively correlated for As), soil pH (positively correlated for Pb), and clay content (negatively correlated for Cd). In conclusion, the two iron-based materials evaluated in this study may be effective stabilization agents for remediating different types of arsenic-, lead-, and cadmium-contaminated soils.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Soil pollution Controlled terms:Arsenic - Binary alloys - Cadmium - Calcium alloys - Efficiency - Iron alloys - Iron oxides - Lead alloys - Manganese alloys - Remediation - Soil moisture - Stabilization Uncontrolled terms:Cd concentrations - Contaminated soils - Dynamic changes - Fe-mn binary oxides - Iron based materials - Lead and cadmiums - Soil incubation - Soil solutions Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 543.2 Manganese and Alloys - 545.2 Iron Alloys - 546.1 Lead and Alloys - 549.2 Alkaline Earth Metals - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering DOI:10.13227/j.hjkx.202010183 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404990 Title:Effects of Temperature and Stirring on the Changes of Antibiotic Resistance Genes and Microbial Communities in Anaerobic Digestion of Dairy Manure Title of translation:温度和搅拌对牛粪厌氧消化系统抗生素抗性基因变化和微生物群落的影响 Authors:Xu, Ji-Fei (1, 2); Zhang, Qiu-Ping (1); Zhu, Tian-Jiao (1); Qin, Shuai (1); Zhu, Wen-Bo (1); Pang, Xiao-Ke (1); Zhao, Ji (1, 2) Author affiliation:(1) School of Ecology and Environment, Inner Mongolia University, Hohhot; 010021, China; (2) Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Inner Mongolia University, Hohhot; 010021, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2992-2999 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the effects of temperature and stirring on antibiotic resistance genes (ARGs) and microbial communities during the anaerobic digestion of dairy manure, mesophilic and thermophilic anaerobic digestion experiments were performed with and without stirring. Two-way analysis of variance indicated that temperature affected biogas production more strongly than stirring (η2=0.934>0.911), and thermophilic and stirring increased the total biogas yield by 13.93% and 12.63%, respectively. The effect of temperature on the removal of ARGs was also stronger than that of stirring (η2=0.992>0.920), where thermophilic conditions enhanced the reduction of ARGs and MGEs to 0.09-1.53 (logarithm), while stirring had no significant effects. When temperature was altered from mesophilic to thermophilic, the microbial communities shifted, with Firmicutes becoming the dominant phylum after thermophilic anaerobic digestion, with a relative abundance of >86%. Network analysis demonstrated that eight genera including Sedimentibacter, Sphaerochaeta, and Pseudomonas were the hosts of ARGs and MGEs, and the redundancy analysis suggested that physicochemical parameters play important roles in shaping microbial communities, especially TAN and TVFAs, which indirectly affected the ARGs by altering their host bacteria.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Anaerobic digestion Controlled terms:Antibiotics - Bacteria - Biogas - Fertilizers - Genes - Manures - Temperature Uncontrolled terms:Antibiotic resistance genes - Effect of temperature - Effects of temperature - Microbial communities - Physicochemical parameters - Redundancy analysis - Thermophilic anaerobic digestion - Thermophilic conditions Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 641.1 Thermodynamics - 804 Chemical Products Generally - 821.5 Agricultural Wastes Numerical data indexing:Percentage 1.26e+01%, Percentage 1.39e+01% DOI:10.13227/j.hjkx.202010173 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211210126223 Title:Influence of PM2.5 Pollution on Health Burden and Economic Loss in China Title of translation:PM2.5污染对我国健康负担和经济损失的影响 Authors:Li, Yong (1); Liao, Qin (1, 2); Zhao, Xiu-Ge (1, 3); Bai, Yun (4); Tao, Yan (1) Author affiliation:(1) Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China; (2) Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; (3) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (4) School of Management Science and Engineering, Chongqing Technology and Business University, Chongqing; 400067, China Corresponding author:Tao, Yan(taoyan@lzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:4 Issue date:April 15, 2021 Publication year:2021 Pages:1688-1695 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Research on health and the economic losses caused by PM2.5 pollution nationwide is critical for pollution control planning. First, the spatiotemporal distribution of PM2.5 and exposure levels were simulated and analyzed using the air quality model (WRF-Chem) in China in 2016. Then, the health burden and economic loss caused by PM2.5 pollution were estimated using environmental health risk and environmental value assessment methods. Finally, the health and economic benefits from achieving specific PM2.5 control targets were estimated. In 2016 in China, high levels of PM2.5 were concentrated in Beijing-Tianjin-Hebei and the surrounding areas, the Yangtze River Delta, the Sichuan Basin, and the desert areas in northwest China. Furthermore, 71.49% of the total population of China was exposed to an environment with PM2.5 concentrations higher than 35 μg•m-3. Subsequently, the national PM2.5-related mortality was 1.06 million, accounting for 10.9% of the total deaths in China. Stroke and ischemic heart disease accounted for approximately 80% of the total PM2.5-related deaths caused by the five diseases studied. Meanwhile, the PM2.5 pollution resulted in economic losses of 705.93 billion yuan, which was 0.95% of the Gross Domestic Product (GDP) in 2016. There were significant spatial differences in the health burden and economic loss, which primarily occurred in regions with high PM2.5 levels or population density. Moreover, reducing PM2.5 to 35 μg•m-3 would only result in a 17.11% reduction in the health burden and economic loss, while a more exacting standard (reducing PM2.5 to 10 μg•m-3) would bring 80.47% of the health and economic benefits. It is suggested that environmental managers further strengthen their control to better protect the health and wealth benefits of residents, especially for sensitive groups, such as patients with cardio-cerebrovascular diseases, particularly in areas with high premature mortality.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Economic and social effects Controlled terms:Air quality - Disease control - Environmental management - Health risks - Losses - Pollution control - Population statistics - Risk assessment - Risk perception - River pollution Uncontrolled terms:Air quality modeling - Cerebrovascular disease - Environmental health risks - Environmental managers - Gross domestic products - Ischemic heart disease - Population densities - Spatiotemporal distributions Classification code:451.2 Air Pollution Control - 453 Water Pollution - 454.1 Environmental Engineering, General - 461.7 Health Care - 911.2 Industrial Economics - 914.1 Accidents and Accident Prevention - 971 Social Sciences Numerical data indexing:Percentage 1.09e+01%, Percentage 1.71e+01%, Percentage 7.15e+01%, Percentage 8.00e+01%, Percentage 8.05e+01%, Percentage 9.50e-01% DOI:10.13227/j.hjkx.202008313 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003402 Title:Impact of Pollutant Emission Reduction on Air Quality During the COVID-19 Pandemic Control in Early 2020 Based on RAMS-CMAQ Title of translation:2020年初疫情管控对山东省空气质量影响的模拟 Authors:Liu, Hou-Feng (1, 2); Xu, Wei (1, 3); Wei, Min (1, 2); Sui, Xiao (1, 2); Xu, Peng-Ju (1, 2); Li, Ming-Yan (1); Zhang, Mei-Gen (4) Author affiliation:(1) College of Geography and Environment, Shandong Normal University, Ji'nan; 250014, China; (2) Environmental Technology and Policy Research Center, Shandong Normal University, Ji'nan; 250014, China; (3) Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou; 510632, China; (4) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China Corresponding author:Zhang, Mei-Gen(mgzhang@mail.iap.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1215-1227 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this work, the relationships between air quality and pollutant emissions were investigated during the COVID-19 pandemic in Shandong Province. During the quarantine period (from January 24 to February 7, 2020), the concentrations of atmospheric pollutants decreased significantly relative to the period before controls were imposed (from January 15 to 23, 2020). Specifically, except for an increase in the concentration of O3, concentrations of PM10, PM2.5, NO2, SO2, and CO decreased for 72.6 μg•m-3 (45.86%), 47.4 μg•m-3(41.24%), 25.6 μg•m-3 (58.00%), 3.0 μg•m-3 (17.71%), and 0.5 mg•m-3 (31.40%), respectively. RAMS-CMAQ simulation showed that meteorological diffusion had an essential role in improving air quality. Influenced by meteorological factors, emissions of PM10, PM2.5, NO2, SO2, and CO were reduced 26.04%, 33.03%, 28.35%, 43.27%, and 23.29%, respectively. Furthermore, the concentrations of PM10, PM2.5, NO2, SO2, and CO were reduced by 19.82%, 8.21%, 29.65%, -25.56%, and 8.12%, respectively, due to pollution emissions reductions during the quarantine period. O3concentrations increased by 20.51% during quarantine, caused by both meteorological factors (10.47%) and human activities (10.04%). These results indicate that primary pollutants were more sensitive to emissions reductions; however, secondary pollutants demonstrated a lagged response the emissions reduction and were significantly affected by meteorological factors. The linear relationship between ozone and the emissions reduction was not significant, and was inverse overall. Further investigation are now required on the impact of emissions reduction on ozone pollution control.
© 2021, Science Press. All right reserved. Number of references:34 Main heading:Quality control Controlled terms:Air quality - Emission control - Nitrogen oxides - Ozone - Sulfur dioxide Uncontrolled terms:Atmospheric pollutants - Emissions reduction - Linear relationships - Meteorological factors - Pollutant emission - Pollution emissions - Primary pollutants - Shandong province Classification code:451.2 Air Pollution Control - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Percentage -2.56e+01%, Percentage 1.00e+01%, Percentage 1.05e+01%, Percentage 1.77e+01%, Percentage 1.98e+01%, Percentage 2.05e+01%, Percentage 2.33e+01%, Percentage 2.60e+01%, Percentage 2.84e+01%, Percentage 2.96e+01%, Percentage 3.14e+01%, Percentage 3.30e+01%, Percentage 4.12e+01%, Percentage 4.33e+01%, Percentage 4.59e+01%, Percentage 5.80e+01%, Percentage 8.12e+00%, Percentage 8.21e+00% DOI:10.13227/j.hjkx.202007246 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404702 Title:Spatio-temporal Patterns and Potential Sources of Absorbing Aerosols in the Fenwei Plain Title of translation:汾渭平原吸收性气溶胶时空演化及潜在源区分析 Authors:Liu, Min-Xia (1); Li, Liang (1); Yu, Rui-Xin (1); Song, Jia-Ying (1); Zhang, Guo-Juan (1); Mu, Ruo-Lan (1); Xu, Lu (1) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2634-2647 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Air quality has gradually improved in many parts of China; however, air pollution is become more severe in the Fenwei Plain. Using OMI/Aura OMAERUV L2 and PM2.5 data, spatial autocorrelation analysis and back trajectory modeling were used to explore the spatio-temporal patterns of absorptive aerosols over the Fenwei Plain, and the dominant types, transmission paths, and potential source areas were identified. The main results can be summarized as follows: ① Annual mean absorbing aerosol index (AAI) values increased between 2005 and 2019, with high period occurring in 2006, 2013, and 2017, with values exceeding 0.63. Xi'an and Linfen were identified as a 'high-high' cluster, with AAI showing poor spatial stability and a 15.3% increase in area over the past 15 years. In contrast, the area connecting Xi'an and Linfen, which occupies 24.2% of the total area of the region, was identified as a 'low-low' cluster, with a sharp drop of 6.2% in area; ② The Fenwei Plain has high AAI values across a large area in winter, exceeding 0.8 in Linfen and Xi'an, and 91.5% of the study area exceeding 0.6. Values were lower in spring (AAI>0.4) and autumn (AAI>0.3), with the lowest values occurring in summer. The atmospheric diffusion conditions in spring, autumn, and winter are poor, associated with anticyclonic high-pressure events. The observed high AAI values were significantly affected by atmospheric diffusion conditions, temperature, and precipitation; ③ Back trajectory and source contribution modeling showed that long-range transport of air masses from Xi'an and Linfen occurs from the northwest, and short-range transport air masses occurs from the east and south. Two long-range sand and dust source areas were determined (with northwestern and northern wind sources); two carbon source areas were identified (with eastern and southern wind sources); and one combined sand and carbon source area was identified (from the Loess Plateau). Of these sources, the northwestern wind source, the Loess Plateau, and the southern wind source have significant influence in Xi'an, and the eastern wind source and the Loess Plateau have a significant impact on Linfen. Linfen is little affected by the northwestern wind source and the dust from the northern wind source. Based on the spatial distribution of CO and its correlation with AAI, it is concluded that cardon in the dominant absorbent aerosol in Linfen dust and carbon are most important in Xi'an.
© 2021, Science Press. All right reserved. Number of references:56 Main heading:Atmospheric movements Controlled terms:Aerosols - Air quality - Carbon - Diffusion - Dust - Landforms - Sediments - Spatial variables measurement - Springs (components) Uncontrolled terms:Absorbing aerosol indices - Atmospheric diffusion - Back-trajectory models - Long range transport - Source contributions - Spatial autocorrelation analysis - Spatiotemporal patterns - Transmission paths Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 481.1 Geology - 483 Soil Mechanics and Foundations - 601.2 Machine Components - 804 Chemical Products Generally - 943.2 Mechanical Variables Measurements Numerical data indexing:Age 1.50e+01yr, Percentage 1.53e+01%, Percentage 2.42e+01%, Percentage 6.20e+00%, Percentage 9.15e+01% DOI:10.13227/j.hjkx.202010098 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247584 Title:Concentration Analysis and Health Risk Assessment of Air Pollutants in Newly Decorated Public Places in Xi'an Title of translation:西安市新装修公共场所空气污染物浓度分析及健康风险评价 Authors:Fan, Jie (1); Fan, Hao (1); Shen, Zhen-Xing (1); Dang, Wen-Peng (2); Zheng, Wei (2); Wang, Zhi-Hua (2); Fu, Yi (2) Author affiliation:(1) Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Shaanxi Yunhang Environmental Protection Technology Co., Ltd., Xi'an; 710075, China Corresponding author:Shen, Zhen-Xing(zxshen@mail.xjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2153-2158 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to understand the levels of indoor air pollution and health risks in public places, our research group conducted air quality monitoring and human health risk assessments for five types of public places (offices, classrooms, laboratories, banks, and hospitals) in Xi'an City from December 2017 to July 2020. The test items included formaldehyde, benzene, toluene, xylene, n-butyl acetate, ethylbenzene, styrene, n-undecane, and total volatile organic compounds (TVOC). The results showed that formaldehyde had the highest exceedance rate (59.4%), followed by toluene, TVOC, benzene, and xylene. Among the five types of public places, hospitals had the highest rate of pollutants exceeding the standard (46.7%), and the main pollutants exceeding the standard were formaldehyde, benzene, and toluene. The results showed that the concentrations of formaldehyde and TVOC were positively correlated with temperature and humidity. The health risk assessment results showed that there were carcinogenic risks of formaldehyde and benzene in different places; people working in banks had a higher risk of formaldehyde carcinogenesis, and those working in hospitals had a higher risk of benzene carcinogenesis. This study provides a reference for the level of indoor air pollution in public places in Xi'an City, and is of great significance to the health risk research of related populations.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Risk assessment Controlled terms:Air quality - Benzene - Formaldehyde - Health risks - Hospitals - Indoor air pollution - Pathology - Public risks - Styrene - Toluene - Volatile organic compounds - Xylene Uncontrolled terms:Air quality monitoring - Carcinogenic risk - Concentration analysis - Human health risk assessment - N-Butyl acetate - Research groups - Temperature and humidities - Total volatile organic compounds Classification code:451 Air Pollution - 451.2 Air Pollution Control - 461.6 Medicine and Pharmacology - 461.7 Health Care - 462.2 Hospitals, Equipment and Supplies - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 4.67e+01%, Percentage 5.94e+01% DOI:10.13227/j.hjkx.202009261 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405043 Title:Pollution Characteristics and Risk Assessment of Nitro Polycyclic Aromatic Hydrocarbons in PM2.5 of Nanjing, China Title of translation:南京市大气细颗粒物(PM2.5)中硝基多环芳烃污染特征与风险评估 Authors:Fu, Yin-Yin (1, 2); Wen, Hao-Zhe (1); Wang, Xiang-Hua (2); Yu, Nan-Yang (1); Li, Bing (2); Wei, Si (1) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China; (2) Jiangsu Academy of Environmental Industry and Technology, Nanjing; 210019, China Corresponding author:Yu, Nan-Yang(yuny@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2626-2633 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Nitro polycyclic aromatic hydrocarbons (NPAHs) are important pollutants with carcinogenic effects present in PM2.5. To analyze the pollution characteristics and sources of NPAHs, 14 samples of PM2.5 were collected in Nanjing from November 2017 to March 2018. The results showed that, 2,8-dinitrodibenzothiophene (743 pg•m-3), 2, 7-dinitrofluorene (331 pg•m-3), 9-nitroanthracene (326 pg•m-3), 3-nitrofluoranthene (217 pg•m-3), and 1,8-dinitropyrene (193 pg•m-3) were dominant, and the detection concentrations notably varied between seasons; the highest concentrations occurred in winter (3 082 pg•m-3) followed by autumn (1 553 pg•m-3) and spring (1 218 pg•m-3). The ratio of nitrofluoranthene and 1-nitropyrene concentrations, and 9-nitroanthracene and 1-nitropyrene concentrations, indicated that the main sources of NPAHs in the PM2.5 of Nanjing were photooxidation of polycyclic aromatic hydrocarbons and biomass burning. NPAHs were more typically associated with smaller particles, which further indicated that secondary formation is an important source. The current carcinogenic risk of NPAHs in PM2.5 in Nanjing is controllable, and dinitro-polycyclic aromatic hydrocarbons represent the highest level of risk. The data presented in this study provide important baseline information that can inform the management of risks associated with NPAHs in PM2.5 in Nanjing.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Risk assessment Controlled terms:Aromatization - Mineral oils - Photooxidation - Pollution - Polycyclic aromatic hydrocarbons Uncontrolled terms:Biomass-burning - Carcinogenic effects - Carcinogenic risk - Nanjing - Nanjing , China - Nitropolycyclic aromatic hydrocarbons Classification code:513.3 Petroleum Products - 802.2 Chemical Reactions - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202009238 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804560 Title:Effects of Straw Mulching and Nitrogen Reduction on the Distribution of Soil Nitrogen and Groundwater Nitrogen Pollution Title of translation:秸秆覆盖与氮减施对土壤氮分布及地下水氮污染影响 Authors:Zhang, Wan-Feng (1); Yang, Shu-Qing (1); Sun, Duo-Qiang (1); Jin, Ya-Hong (1); Lou, Shuai (1); Liu, Peng (1) Author affiliation:(1) Water Conservancy and Civil Engineering College, Inner Mongolia Agricultural University, Hohhot; 010018, China Corresponding author:Yang, Shu-Qing(nmndysq@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:786-795 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the effects of straw mulching and reduced nitrogen fertilization on the temporal and spatial patterns of soil nitrogen, groundwater nitrogen pollution, and summer maize yield, field experiments were carried out in the Hetao irrigation district in 2017 and 2018. The experiment involved the following seven treatments: a control (CK) treatment involving conventional fertilization and traditional tillage, and conventional nitrogen applications reduced by 30% (N1), 20% (N2), and 10% (N3) coupled with either straw surface covering (B) or deep straw burial (S). The results showed that the distribution of soil nitrogen in the CK treatment varied depending on soil depth, with an overall decreasing trend. In the 0-20 cm soil layer under straw surface covering (B) treatments, soil nitrogen was superficially accumulated. NO3--N and NH4+-N content increased by an average of 22.2% and 42.7% compared to the CK treatment, respectively, which decreased significantly at first and then increased slightly with depth. In the 20-40 cm deep soil layer under the deep straw burial (S) treatments, soil nitrogen accumulated and the content of NO3--N and NH4+-N increased by an average of 29.8% and 48.1%, respectively, compared to the CK treatment. Nitrogen accumulation first and then decreased significantly with depth. Nitrogen accumulation under the different straw mulching regimes increased with an increase in the application of reduced nitrogen. After the harvest of summer maize, the accumulation of NO3--N and NH4+-N in the >80 cm soil layer under the B treatments was 19.9%-58.2% and 31.1%-61.7% lower than that of the CK treatment, respectively. This compared to reductions of 36.7%-70.9% and 82.6%-89.2% for the S treatments, respectively. Only the BN3 treatment increased accumulation compared with CK by 0.4% on average, while the SN2 treatment resulted in a 9.3% increase. Summer maize yield and relative indexes were also improved relative to the other treatments. Nonlinear fitting of yield and application reduction showed that deep straw burial was better than surface covering at increasing summer maize production. The effect of deep straw burial and 14%-20% application reduction was better. Straw mulching with reduced nitrogen fertilization can limit nitrogen leaching and thereby reduce the risk of groundwater pollution. After the harvest, groundwater quality was classified in the Ⅱ class, with the risk of nitrogen contamination being lowest under deep straw burial with>20% reduced nitrogen fertilization. These observations show that deep straw deep alongside 14%-20% application reduction could effectively alleviate nitrogen leaching and reduce the risk of nitrogen pollution in groundwater. This approach can help improve the ecological environment and summer maize yields in the Hetao irrigation district.
© 2021, Science Press. All right reserved. Number of references:49 Main heading:Soil pollution Controlled terms:Groundwater - Groundwater pollution - Irrigation - Leaching - Nitrogen - Pollution control - Soil surveys - Soils - Water quality Uncontrolled terms:Ecological environments - Hetao irrigation districts - Nitrogen accumulation - Nitrogen leaching - Nitrogen pollution - Nitrogen reduction - Nonlinear fitting - Temporal and spatial pattern Classification code:444.2 Groundwater - 445.2 Water Analysis - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 821.3 Agricultural Methods Numerical data indexing:Percentage 4.00e-01%, Percentage 4.27e+01%, Percentage 4.81e+01%, Percentage 8.26e+01% to 8.92e+01%, Percentage 9.30e+00%, Size 0.00e+00m to 2.00e-01m, Size 2.00e-01m to 4.00e-01m, Percentage 1.40e+01% to 2.00e+01%, Percentage 1.99e+01% to 5.82e+01%, Percentage 2.22e+01%, Percentage 2.98e+01%, Percentage 3.11e+01% to 6.17e+01%, Percentage 3.67e+01% to 7.09e+01% DOI:10.13227/j.hjkx.202006213 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710248377 Title:Mechanisms of Penicillin Wastewater Treatment by Coupled Electrocatalytic and Bioelectrochemical Systems Title of translation:电催化-生物电化学耦合系统处理青霉素废水的机制 Authors:Qu, You-Peng (1, 2); Lü, Jiang-Wei (3); Dong, Yue (1); Feng, Yu-Jie (1); Zhang, Jie (1) Author affiliation:(1) State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin; 150090, China; (2) School of Life Science and Technology, Harbin Institute of Technology, Harbin; 150080, China; (3) School of Pharmacy, Harbin University of Commerce, Harbin; 150076, China Corresponding author:Feng, Yu-Jie(yujief@hit.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2378-2384 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Large amounts of wastewater containing residual antibiotics are produced in antibiotics production, but it is difficult for traditional biological wastewater treatment to efficiently treat this high concentration antibiotic wastewater. Coupled electrocatalytic and bioelectrochemical systems were proposed to treat typical β-lactam antibiotics (penicillin) wastewater. The penicillin wastewater was oxidized by a boron-doped diamond (BDD) electrocatalytic electrode and then steadily treated by a bioelectrochemical system (BES). The penicillin removal rate of the electrocatalytic system was 89%, and 79% of the residual penicillin was further removed by the BES. The maximum power density of the BES with pretreated penicillin of (1 124±28) mW•m-2 was increased by 473% compared with that of the BES with raw penicillin. The total penicillin removal rate was 98% in the electrocatalytic and bioelectrochemical system. The results of the BES anode biomass and biofacies showed that Acinetobacter was the dominant bacterial group on the anode before penicillin addition, and it was the main microorganism in the formation of the anode biofilm. Bacillus is an electricity-producing bacterium with a power generation function. Penicillin inhibited the biomass of the mixed anode bacteria and the biological activity of Proteus microorganisms, which were the main electricity-producing bacteria, and reduced the biomass of Acinetobacter and Bacillus. This was the main factor affecting the power generation performance and reactor treatment effect. The pretreatment of penicillin wastewater by electrocatalytic degradation can significantly decrease its concentration, efficiently alleviate the inhibition of the BES by penicillin, and improve the biodegradability of wastewater. The coupled electrocatalytic and bioelectrochemical system is a new technology for antibiotic wastewater treatment with a high efficiency and low energy consumption.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Wastewater treatment Controlled terms:Anodes - Antibiotics - Bacteria - Bacteriology - Bioactivity - Biodegradability - Biological water treatment - Biomass - Electric power generation - Energy utilization - Reclamation Uncontrolled terms:Antibiotic wastewaters - Bio-electrochemical systems - Bioelectrochemical systems (BES) - Biological waste water treatment - Electrocatalytic degradations - Electrocatalytic electrodes - Electrocatalytic system - Low energy consumption Classification code:445.1 Water Treatment Techniques - 452.4 Industrial Wastes Treatment and Disposal - 461.6 Medicine and Pharmacology - 525.3 Energy Utilization - 714.1 Electron Tubes - 801.2 Biochemistry Numerical data indexing:Percentage 4.73e+02%, Percentage 7.90e+01%, Percentage 8.90e+01%, Percentage 9.80e+01% DOI:10.13227/j.hjkx.202007300 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20205209688809 Title:Effects of Adding Straw and Biochar with Equal Carbon Content on Soil Respiration and Microbial Biomass Carbon and Nitrogen Title of translation:等碳量添加秸秆和生物炭对土壤呼吸及微生物生物量碳氮的影响 Authors:He, Tian-Tian (1); Wang, Jing (1); Fu, Yun-Peng (1); Fu, Xin-Yan (2); Liu, Tian (1); Li, Ya-Kun (1); Li, Jian-Hua (2) Author affiliation:(1) Key Laboratory of Tobacco Cultivation of China Tobacco Industry, College of Tobacco Science, Henan Agricultural University, Zhengzhou; 450002, China; (2) Xuchang Municipal Tobacco Company, Xuchang; 461000, China Corresponding author:Fu, Yun-Peng(ypfu01@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:1 Issue date:January 15, 2021 Publication year:2021 Pages:450-458 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to investigate the response of soil respiration, soil microbial biomass carbon and nitrogen, and hydrothermal factors to the addition of biochar and straw, we used an LI-8100 soil carbon flux meter (LI-COR, Lincoln, USA) to study changes in soil respiration and microbial biomass under four treatments: conventional fertilization (CK), conventional fertilization +2.25t•hm-2 biochar-C (T1), conventional fertilizer +2.25t•hm-2 straw-C (T2), and conventional fertilizer +2.25t•hm-2 (biochar-C+straw-C), biochar-C:straw-C=1:1 (T3). The results showed that: ① the addition of biochar and straw significantly increased the soil respiration rate and total CO2 emissions, with the largest increase in T3 and the smallest increase in T1. The effect of T1 on soil respiration was promoted in the early stage and later inhibited. ② The microbial biomass carbon and nitrogen and the number of functional bacterial colonies increased significantly with biochar and straw amendments. T1 had a significant promotion effect on nitrogen-fixing bacteria, while T2 had no significant effect on the number of fungi, and T3 showed a positive interaction effect. Soil respiration rates were significantly and positively related to soil microbial biomass carbon and nitrogen as well as to the number of bacteria and actinomycetes. ③ The 5 cm soil temperature of T3 significantly increased by 4.53%. The soil respiration rate and soil temperature showed a significant exponential correlation. To sum up, adding straw and biochar with equal carbon content can significantly increase the soil respiration rate and microbial biomass, and the interaction effect between biochar and straw is positive. Compared with that of the straw treatments, the application of biochar can reduce carbon mineralization to a certain extent, and the effect of carbon sequestration is better.
© 2021, Science Press. All right reserved. Number of references:46 Main heading:Soils Controlled terms:Bacteria - Biomass - Carbon - Forestry - Nitrogen fertilizers - Nitrogen fixation - Temperature Uncontrolled terms:Bacterial colonies - Carbon mineralization - Exponential correlation - Microbial biomass carbon and nitrogen - Nitrogen fixing bacteria - Positive interaction - Soil microbial biomass carbons - Soil respiration rates Classification code:483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Percentage 4.53e+00%, Size 5.00e-02m DOI:10.13227/j.hjkx.202004196 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110404717 Title:Profiling of Antibiotic Resistance Genes in Different Croplands Title of translation:不同作物农田土壤抗生素抗性基因多样性 Authors:Huang, Fu-Yi (1, 2); Zhou, Shu-Yi-Dan (1, 2); Wang, Jia-Ni (1); Su, Jian-Qiang (1, 2); Li, Hu (1, 2) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Li, Hu(hli@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2975-2980 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Soil is the primary interface of Earth's critical zone and plays an important role in food security and sustaining environmental balance. Antibiotic resistance genes (ARGs) pose significant threat to human health and ecosystems, with croplands being intensively affected via planting patterns and the application of fertilizers. The transmission of ARGs in croplands remains largely unknown. Using high throughput quantitative Polymerase Chain Reaction (HT-qPCR) techniques, we investigated the occurrence and diversity of ARGs and their association with heavy metals in different croplands in China. A total of 187 ARGs were identified, ranging from 89 to 159 in agricultural soils. The abundance of ARGs ranged from 6.47×109 to 1.41×1010 copies•g-1 with multidrug resistance genes being the most abundant. Heavy metals including As, Co, Cr, Mo, Ni, and Pb were correlated with ARGs using the R package 'evnfit'. Furthermore, redundancy analysis (RDA) revealed that the heavy metals explained 59.3% of the variability of ARGs in the different croplands, indicating that heavy metals might exert an important influence on the composition and transmission of ARGs. Croplands soils act as a vital reservoir and reaction media for ARGs. Different crop cultivation coupled with selection pressure of heavy metals from fertilizers could have potential impacts on the prevalence, diversity, and distribution of ARGs.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Polymerase chain reaction Controlled terms:Agricultural robots - Antibiotics - Association reactions - Biomarkers - Cultivation - Fertilizers - Food supply - Genes - Health risks - Heavy metals - Soils - Transmissions Uncontrolled terms:Agricultural soils - Antibiotic resistance genes - Application of fertilizers - Environmental balance - Multidrug resistance - Quantitative polymerase chain reaction - Redundancy analysis (RDA) - Selection pressures Classification code:461 Bioengineering and Biology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 602.2 Mechanical Transmissions - 801.2 Biochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 821.3 Agricultural Methods - 822.3 Food Products Numerical data indexing:Percentage 5.93e+01% DOI:10.13227/j.hjkx.202009091 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779635 Title:Distribution Characteristics and Ecological Risk Assessment of Soil Heavy Metals in Typical Watersheds of the Qinghai-Tibet Plateau Title of translation:青藏高原典型流域土壤重金属分布特征及其生态风险评价 Authors:Du, Hao-Lin (1); Wang, Ying (1); Wang, Jin-Song (1); Yao, Yu-Bi (1, 2); Zhou, Yue (3); Liu, Xiao-Yun (1); Lu, Ya-Ling (1) Author affiliation:(1) Gansu Key Laboratory of Arid Climatic Change and Reducing Disaster, Key Laboratory of Arid Climatic Change and Disaster Reduction, Lanzhou Institute of Arid Meteorology of China Meteorology Administration, Lanzhou; 730020, China; (2) College of Meteorology, Lanzhou Resources & Environment Vocational-Technical College, Lanzhou; 730021, China; (3) Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain, China Meteorological Administration, Wuhan; 430205, China Corresponding author:Wang, Ying(wangyn924@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4422-4431 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The Qinghai-Tibet Plateau is an extremely vulnerable area that is sensitive to human activities. In recent years, more and more human disturbances have been detected in this area. This study analyzed the spatial distribution and ecological risks of 7 heavy metals (Cr, Ni, Cu, Zn, As, Cd, and Pb) in two regions, namely the Bailong River and Yellow River and their two tributaries (BY region) in Gannan and the Yarlung Zangbo River and its two tributaries (YZ region) in Tibet. In terms of spatial distribution, concentrations of the seven heavy metals were higher in the east and lower in the west of the BY region. The average concentrations all exceeded the background value of the Qinghai-Tibet Plateau, especially for Cd (4.50 times) and As (2.83 times). High Pb concentrations were mainly found in water, urban and rural residential land, and industrial and construction land. In the YZ region, heavy metal concentrations were lower along the river, while high-altitude areas exhibited higher heavy metal concentrations. The average concentrations of Ni, Zn, As, and Cd exceeded the background values of the Qinghai-Tibet Plateau, especially that of Cd (3.13 times), which mostly exhibited high values in water coverage areas. The geo-accumulation index method and the potential ecological risk index method show that the degree of As and Cd pollution was relatively high in the BY region in Gannan, with the greatest potential ecological risk occurring in the water coverage area. In the YZ region in Tibet, the degree of Cd pollution was high, with the highest potential ecological risk also occurring in the water coverage area. This study provides significant guidance for the environmental protection, sustainable development, and utilization of soil under different types of land use in the Qinghai-Tibet Plateau.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:River pollution Controlled terms:Environmental protection - Heavy metals - Image resolution - Land use - Risk assessment - Rivers - Spatial distribution - Sustainable development Uncontrolled terms:Average concentration - Distribution characteristics - Ecological risk assessment - Geo-accumulation index - Heavy metal concentration - Human disturbances - Potential ecological risk - Qinghai Tibet plateau Classification code:403 Urban and Regional Planning and Development - 453 Water Pollution - 454.2 Environmental Impact and Protection - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics DOI:10.13227/j.hjkx.202012123 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212710582383 Title:Treatment of Medium Ammonium Wastewater by Single-stage Partial Nitritation-ANAMMOX SMBBR Title of translation:一段式亚硝化厌氧氨氧化SMBBR处理中低浓度氨氮废水 Authors:Lü, Kai (1, 2); Shao, Xian-Ming (1, 2); Wang, Kang-Zhou (1, 2); Yao, Xue-Wei (1, 2); Peng, Dang-Cong (1); Han, Yun (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an; 710055, China Corresponding author:Peng, Dang-Cong(dcpeng@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:7 Issue date:July 15, 2021 Publication year:2021 Pages:3385-3391 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A SMBBR was established to treat medium ammonium under room temperature. Results showed that TN load can reach 0.16 kg•(m3•d)-1, and the average TN removal efficiency was (51.58±6.80) % in the SMBBR with an influent ammonia concentration of 100 mg•L-1 and DO of 0.4-0.7 mg•L-1. AOB, ANAMMOX, and NOB activity reached (2 253.21±502.10) mg•(m2•d)-1, (4 847.46±332.89) mg•(m2•d)-1, and (1 455.17±473.83) mg•(m2•d)-1, and ANAMMOX and AOB bacteria were found to develop a good collaborative relationship. Quantitative PCR results showed that the relative abundance of ANAMMOX, AOB and NOB were 11.57%, 1.01% and 0.94%, respectively. The stable operation of single stage partial nitritation-ANAMMOX process provide an alternative technology for medium ammonia wastewater.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Wastewater treatment Controlled terms:Ammonia - Nitrogen removal - Polymerase chain reaction Uncontrolled terms:Alternative technologies - Ammonia concentrations - Collaborative relationships - Partial nitritation - Quantitative PCR - Relative abundance - Removal efficiencies - Stable operation Classification code:452.4 Industrial Wastes Treatment and Disposal - 801.2 Biochemistry - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 1.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e-04kg/m3 to 7.00e-04kg/m3, Percentage 1.01e+00%, Percentage 1.16e+01%, Percentage 9.40e-01% DOI:10.13227/j.hjkx.202011258 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804542 Title:Distribution Characteristics of Viruses Microorganisms in a Water Supply System with Combined Ultraviolet Chloramine Disinfection Title of translation:紫外氯胺组合消毒供水系统中病毒微生物的分布特征 Authors:Han, Xue (1); Sun, Jian-Wei (2); Zhang, Li (2); Wang, Zhe-Ming (2); Bai, Xiao-Hui (1) Author affiliation:(1) State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Shanghai Pudong Veolia Water Corporation Limited, Shanghai; 200127, China Corresponding author:Bai, Xiao-Hui(xhbai@sjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:860-866 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the effect of combined ultraviolet (UV) chloramine disinfection on viruses in a drinking water supply system, a full-scale experiment was conducted to analyze the distribution, variability, community structure, and hosts of viruses using metagenomics. The results showed that the combined UV chloramine process reduced the number of virus species (6.13%) and gene abundance (51.97%) but did not completely remove the viruses from the water. The United States Environmental Protection Agency (USEPA) report that virus removal efficiencies from water can reach 99%-99.99% based on culturing methods. However, in this study, metagenomic analysis indicated a total virus removal rate of only 93.46%. Therefore, the detection of viruses in water using culturing method cannot reliably detect viruses in drinking water. Caudovirales are the most abundant type of virus in water supply systems and are sensitive to chloramine disinfection. Lentivirus, as a virus that can infect humans and vertebrates, has strong resistance to UV and chloramine disinfection. The main virus hosts in the studied water supply system were bacteria (61.50%). The viruses in the raw water were mainly parasitic in Synechococcus. The dominant virus host was Pseudomonas in both the effluent water and pipe network water. The gene abundance of the Pseudomonas aeruginosa host in the pipe network increased by 342.62%, which requires further attention as a virus risk in pipe network systems. Overall, combined UV chloramine disinfection was more effective at the removal of virus hosts than single UV disinfection (51.97% compared to 0.79%).
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Viruses Controlled terms:Bacteria - Computer viruses - Disinfection - Effluents - Environmental Protection Agency - Genes - Potable water - Water supply - Water supply systems Uncontrolled terms:Community structures - Culturing methods - Detection of virus - Distribution characteristics - Full-scale experiment - Metagenomic analysis - Pseudomonas aeruginosa - United states environmental protection agencies Classification code:444 Water Resources - 446.1 Water Supply Systems - 452.3 Industrial Wastes - 454.2 Environmental Impact and Protection - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology Numerical data indexing:Percentage 3.43e+02%, Percentage 5.20e+01%, Percentage 6.13e+00%, Percentage 6.15e+01%, Percentage 7.90e-01%, Percentage 9.35e+01%, Percentage 9.90e+01% to 1.00e+02% DOI:10.13227/j.hjkx.202007039 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804553 Title:Distribution Characteristics and Source Analysis of Water-soluble Ions in Particulate Matter Under Different Weather Processes in Nanjing Title of translation:南京市不同天气过程下颗粒物中水溶性离子分布特征及其来源解析 Authors:Zhang, Yang (1); Wang, Hong-Lei (1); Liu, An-Kang (1); Chen, Kui (1); Zhang, Yi-Xin (1); Liu, Si-Han (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Wang, Hong-Lei(hongleiwang@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:564-573 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:From November 16 to 28 2018, water-soluble ions in particulate matter and some trace gases in Nanjing City were observed using the online gas composition and aerosol monitoring system MARGA ADI 2080. Combined with meteorological elements and sounding data, the distribution characteristics and day-night differences of pollutants and water-soluble ions during haze, fog, clear, and precipitation processes were analyzed. The results show that the average concentration of PM2.5 varied from 26.9μg•m-3 (precipitation) to 96.4μg•m-3 (haze) while total water-soluble ions varied between 23.7μg•m-3 (precipitation) and 89.7μg•m-3 (haze). The ranked order of ion concentrations was NO3-> NH4+> SO42-> Cl-> K+> Ca2+> Na+> Mg2+during haze and fog events, and NO3-> SO42-> NH4+> Cl->Ca2+>K+>Na+>Mg2+during clear weather and precipitation period. The diurnal distributions of water-soluble ions were quite different under the four conditions, although SO42-, NO3-, and NH4+(SNA) were ranked haze>fog>clear>precipitation for both day and night periods. According to the PMF source analysis, secondary sources were the main factors affecting haze; secondary sources, sea salt, and combustion sources were the main pollution sources to foggy conditions; and the removal effect of precipitation on coal-fired sources and secondary sources was more notable than during clear conditions.
© 2021, Science Press. All right reserved. Number of references:48 Main heading:Particles (particulate matter) Controlled terms:Coal combustion - Fog - Ions - Salt removal - Water pollution Uncontrolled terms:Aerosol monitoring - Average concentration - Distribution characteristics - Diurnal distributions - Ion concentrations - Meteorological elements - Particulate Matter - Precipitation process Classification code:443.1 Atmospheric Properties - 453 Water Pollution - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 802.3 Chemical Operations - 951 Materials Science DOI:10.13227/j.hjkx.202005317 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779669 Title:Phosphorus Fractions and Quantitative Identification of Pollution Sources in Nanhai Wetland, Baotou Title of translation:包头南海湿地磷形态及污染源定量识别 Authors:Bai, Ya-Hong (1); Qian, Chen-Ge (1); Yuan, Si-Jing (1); Xie, Zi-Yan (1); Lai, Ling-Zi (1); Zhang, Min (1); Liu, Ying (1, 2); Miao, Chun-Lin (3) Author affiliation:(1) College of Life and Environmental Sciences, Minzu University of China, Beijing; 100081, China; (2) Beijing Engineering Research Center of Food Environment and Health, Minzu University of China, Beijing; 100081, China; (3) Baotou Nanhai Wetland Management Office, Baotou; 014040, China Corresponding author:Liu, Ying(liuying4300@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4275-4286 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, total phosphorus (TP) and the phosphorus (P) fractions in the water and surface sediments of the Baotou Nanhai wetland in China were determined using molybdenum blue/ascorbic acid spectrophotometry and continuous extraction methods. An APCS-MLR receptor model was combined with correlation analysis (CA) and principal component analysis (PCA) to identify and quantify the pollution sources. The results showed ① differences in the pollution level of phosphorus between the surface sediments and water. The contribution of dissolved inorganic phosphorus (DIP) to TP in the water (WTP) was the lowest, while the contribution of calcium-bound phosphorus (HCl-P) to TP in the surface sediments (STP) was the largest in the study area. The surface sediments of the Nanhai Lake (L area) and the wetland plant area (P area) exhibited high bioavailability and the potential for releasing phosphorus into the water, which could result in eutrophication and is therefore of concern. ② The APCS-MLR receptor model indicated that the main pollution sources of phosphorus were industrial wastewater and domestic sewage (29.07%), and pesticides and fertilizers (29.00%). In addition, the degradation of animal and plant residues (18.49%) also contributed to pollution in the study area.
© 2021, Science Press. All right reserved. Number of references:57 Main heading:Phosphorus Controlled terms:Biochemistry - Chlorine compounds - Eutrophication - Extraction - Lake pollution - Sewage - Surficial sediments - Wetlands Uncontrolled terms:Continuous extraction - Correlation analysis - Dissolved inorganic phosphorus - Industrial wastewaters - Phosphorus fractions - Pollution sources - Quantitative identification - Surface sediments Classification code:452.1 Sewage - 453 Water Pollution - 483 Soil Mechanics and Foundations - 801.2 Biochemistry - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 1.85e+01%, Percentage 2.90e+01%, Percentage 2.91e+01% DOI:10.13227/j.hjkx.202101207 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210910003287 Title:One-step Preparation of Lanthanum-Magnesium Ferrite and Its Phosphate Adsorption Capacity in Aqueous Solutions Title of translation:一步法La@MgFe2O4的制备及其吸附水中磷的性能 Authors:Bai, Run-Ying (1); Song, Bo-Wen (1); Zhang, Yu (1); Hao, Jun-Feng (1); Liu, Jian-Ming (1); Liu, Yu-Hong (1) Author affiliation:(1) School of Civil Engineering, Inner Mongolia University of Technology, Hohhot; 010000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:3 Issue date:March 15, 2021 Publication year:2021 Pages:1461-1468 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Due to the shortage of phosphate and the eutrophication caused by phosphorus pollution, it is urgent to recover phosphate from wastewater. Given their high adsorption capacity and convenient separation from water to which a magnetic field is applied, ferrite composites have received increasing attention for phosphate recovery. In this study, Spinel La@MgFe2O4 was prepared using a one-step co-precipitation method. La3+ loading on grain boundary defects of MgFe2O4, and phosphorus absorption capacity were examined using X-ray diffraction (XRD), Fourier-transform infrared spectrometry (FTIR), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry (VSM). The structure of La@MgFe2O4 involved La3+ loading on grain boundary defects of MgFe2O4 in the form of La(OH)3. The addition of La changed the crystallinity and morphology of MgFe2O4, which greatly improved the capacity of MgFe2O4 for phosphorus adsorption. Saturation magnetization remained at 14 emu•g-1, which was easily separated from water using an external magnetic field. The maximum adsorption capacity was 143.156 mg•g-1 at pH 6 and 10℃, which was comparable to that achieved at 25℃. Kinetic observations showed that a low phosphorus concentration (10 mg•L-1) could result in extremely low phosphorus adsorption by La@MgFe2O4 after 30 min. The adsorption mechanism shows that phosphorus is removed through ligand exchange and the formation of inner spherical complexes. La@MgFe2O4 has highly selective adsorption with respect to phosphate, and the adsorbent can be reused many times after desorption. Based on addition of 1 g•L-1 of La@MgFe2O4 in the treatment of low temperature municipal wastewater in Northern China, phosphate concentrations could be reduced to less than 0.5 mg•L-1 an hour, offering a promising means of phosphate adsorption even in cold regions.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Magnesium compounds Controlled terms:Absorption spectroscopy - Adsorption - Crystallinity - Eutrophication - Ferrite - Fourier transform infrared spectroscopy - Grain boundaries - Iron compounds - Lanthanum compounds - Magnetic fields - Phosphorus - Precipitation (chemical) - Saturation magnetization - Temperature - Wastewater treatment - X ray photoelectron spectroscopy Uncontrolled terms:Coprecipitation method - External magnetic field - Fourier transform infrared spectrometry - High adsorption capacity - Phosphate adsorption capacity - Phosphate concentration - Phosphorus concentration - Vibrating sample magnetometry Classification code:452.4 Industrial Wastes Treatment and Disposal - 531.2 Metallography - 641.1 Thermodynamics - 701.2 Magnetism: Basic Concepts and Phenomena - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.00e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Time 1.80e+03s DOI:10.13227/j.hjkx.202008084 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804510 Title:Seasonal Removal Efficiency and Degradation Products of Two Typical PPCPs in Subsurface Flow Constructed Wetlands Title of translation:两种典型PPCPs在潜流人工湿地中的季节性去除效果及降解产物 Authors:Li, Chao-Yu (1); Yang, Yi-Xiao (2); Zhang, Ning (1); Xie, Hui-Jun (1); Hu, Zhen (3); Zhang, Jian (3) Author affiliation:(1) Environment Research Institute, Shandong University, Qingdao; 266200, China; (2) Guangzhou Metro Design & Research Institute Co., Ltd., Guangzhou; 510010, China; (3) School of Environmental Science and Engineering, Shandong University, Qingdao; 266200, China Corresponding author:Xie, Hui-Jun(xiehuij@sdu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:842-849 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The pollution of surface waters by pharmaceuticals and personal care products (PPCPs) has aroused widespread concern. Constructed wetlands (CWs) have outstanding advantages in the removal of PPCPs; however, few studies have focused on the interaction of different types of PPCPs in CWs. In this study, two typical PPCPs [broad-spectrum antimicrobial agents triclosan (TCS) and non-steroidal anti-inflammatory drug diclofenac (DCF)] were selected as target pollutants and their removal behavior in subsurface flow CWs was analyzed. The effects of different seasons and influent conditions (i.e., single and combined addition of TCS and DCF) on removal efficiency was also examined. The main parameters of the CW system were as follows: the up-flow subsurface CW had a hydraulic load of 0.20 m•d-1 and a hydraulic residence time of 3 d with a continuous flow inlet. The initial influent concentration of PPCPs was 80 g•L-1 for TCS and 25 g•L-1 for DCF. The results showed that the average removal efficiencies for TCS and DCF in summer (91.72% and 85.86%, respectively) were significantly higher than in winter (52.88% and 32.47%, respectively). Independent sample t-tests confirmed that there was no significant difference in the removal efficiency of TCS and DCF under the different influent conditions (single and combined addition). The degradation products of TCS and DCF were also no different between the influent systems, and the representative degradation products of TCS were not detected in all systems. The main degradation products of DCF in the different systems were 3,5-dichlorobenzoic acid and m-dichlorobenzene. The two studied PPCPs showed no significant antagonism and competition effects at trace levels.
© 2021, Science Press. All right reserved. Number of references:29 Main heading:Wetlands Controlled terms:Antimicrobial agents - Degradation - Efficiency - River pollution Uncontrolled terms:Broad spectrum antimicrobial agents - Constructed wetlands (CWs) - Hydraulic residence time - Influent concentrations - Non-steroidal anti-inflammatory drugs - Pharmaceuticals and personal care products - Removal efficiencies - Subsurface flow constructed wetlands Classification code:453 Water Pollution - 461.6 Medicine and Pharmacology - 802.2 Chemical Reactions - 913.1 Production Engineering Numerical data indexing:Mass_Density 2.50e+01kg/m3 to 2.20e-02kg/m3, Mass_Density 8.00e+01kg/m3 to 2.20e-02kg/m3, Percentage 3.25e+01%, Percentage 5.29e+01%, Percentage 8.59e+01%, Percentage 9.17e+01% DOI:10.13227/j.hjkx.202004037 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110405137 Title:Pollution Characteristics and Removal of Typical Pharmaceuticals in Hospital Wastewater and Municipal Wastewater Treatment Plants Title of translation:典型药物在医院废水和城市污水处理厂中的污染特征及去除情况 Authors:Ye, Pu (1); You, Wen-Dan (1); Yang, Bin (1); Chen, Yang (2); Wang, Li-Gao (2); Zhao, Jian-Liang (1); Ying, Guang-Guo (1) Author affiliation:(1) Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, School of Environment, South China Normal University, Guangzhou; 510006, China; (2) Yulin Xintao Environmental Protection Technology Co., Ltd., Agile Environmental Protection Group, Yulin; 537000, China Corresponding author:Yang, Bin(bin.yang@m.scnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2928-2936 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In this study, solid phase extraction (SPE) coupled with high-performance liquid chromatography-tandem triple quadrupole mass spectrometry (HPLC-MS/MS) was used to track the contamination of 17 benzodiazepines, 14 acidic pharmaceuticals, and 5 neutral pharmaceuticals in 4 hospital wastewater treatment systems and 3 municipal wastewater treatment plants in Guangzhou, Guangdong Province. The results showed that a total of 10 benzodiazepines, 8 acidic, and 3 neutral pharmaceuticals were detected in the hospital wastewater treatment systems with concentrations in the ranges of 0.41-23 376 ng•L-1 and 0.11-22 888 ng•L-1 in the influents and effluents, respectively; The 8 benzodiazepines, 8 acidic, and 4 neutral pharmaceuticals were detected in the municipal wastewater treatment plants with concentrations in the ranges of 0.4-1 695 ng•L-1 (influents) and 0.1-1 526 ng•L-1 (effluents). Among them, high levels of benzodiazepine compounds including lorazepam [(53.1±2.7) ng•L-1, H1], oxazepam [(39.5±4.1) ng•L-1, W2] and clozapine [(30.6±4.0) ng•L-1, W1] were detected. Ibuprofen [(19 014±5 430) ng•L-1, H1] and paracetamol [(2 600±570) ng•L-1, H2] were found to have the highest concentrations for the acidic and neutral pharmaceuticals, respectively. Less than 30% of benzodiazepines were removed in hospital wastewater treatment systems and municipal wastewater treatment plants; however, acidic and neutral pharmaceuticals had higher removal rates. The municipal wastewater treatment plants had greater performance in the removal of acidic and neutral pharmaceuticals (mostly 60%-99%) than the hospital wastewater treatment systems (mostly 10%-60%). Finally, the usage and pollution emissions of 20 typical pharmaceuticals in Guangzhou and Guangdong Province were calculated based on the average emission per person. The total amount of usage in Guangzhou and Guangdong was 3 942 kg•a-1 and 30 371 kg•a-1, respectively. Paracetamol and ibuprofen had the greatest values, as did oxazepam and lorazepam benzodiazepines. The emission rate of these 20 pharmaceuticals in Guangzhou reached 1 456 g•a-1 with concentrations ranging from 3.07 (mefenamic acid) to 378 g•a-1 (oxazepam).
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Sewage treatment plants Controlled terms:Aromatic compounds - Drug products - Effluents - High performance liquid chromatography - Hospitals - Mass spectrometry - Phase separation - Pollution - Reclamation - Sewage pumping plants - Wastewater treatment - Water treatment plants Uncontrolled terms:Acidic pharmaceuticals - Benzodiazepines - Guangdong Province - Hospital wastewater - Mefenamic acid - Municipal wastewater treatment plants - Pollution emissions - Solid-phase extraction Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 462.2 Hospitals, Equipment and Supplies - 641.1 Thermodynamics - 801 Chemistry - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.00e-10kg/m3 to 1.53e-06kg/m3, Mass_Density 1.10e-10kg/m3 to 2.29e-05kg/m3, Mass_Density 4.00e-10kg/m3 to 1.70e-06kg/m3, Mass_Density 4.10e-10kg/m3 to 2.34e-05kg/m3, Percentage 1.00e+01% to 6.00e+01%, Percentage 3.00e+01%, Percentage 6.00e+01% to 9.90e+01% DOI:10.13227/j.hjkx.202011001 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20211710247401 Title:Pollution and Irrigation Applicability of Surface Water from Wet, Normal, and Dry Periods in the Huixian Karst Wetland, China Title of translation:会仙岩溶湿地丰平枯水期地表水污染及灌溉适用性评价 Authors:Zhu, Dan-Ni (1); Zou, Sheng-Zhang (1); Li, Jun (1, 2); Fan, Lian-Jie (3); Zhao, Yi (1); Xie, Hao (1); Zhu, Tian-Long (2); Pan, Min-Qiang (4); Xu, Li (2) Author affiliation:(1) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources, Hebei University of Architecture, Zhangjiakou; 075000, China; (3) School of Environmental Science & Engineering, Guilin University of Technology, Guilin; 541006, China; (4) Zhangjiakou Ecological Environment Monitoring Center of Hebei Province, Zhangjiakou; 075000, China Corresponding authors:Li, Jun(532443515@qq.com); Fan, Lian-Jie(flianjie@mail.cgs.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:5 Issue date:May 15, 2021 Publication year:2021 Pages:2240-2250 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To reveal the hydrochemical characteristics of karst wetland located in a subtropical area and at lower elevations in China, 27 surface water samples were collected during three periods (wet, normal, and dry) in the Huixian karst wetland to investigate the distributions, pollution, and irrigation application of 12 inorganic ions and 10 heavy metals. Based on their concentrations, the Nemerow index and the four evaluation systems of the sodium adsorption ratio (SAR), sodium concentration (SC), permeability index (PI), and residual sodium carbonate (RSC) were applied to evaluate the pollution characteristics and irrigation application. It was found that the water type in this area was Ca2+-HCO3- and weakly alkaline. Regarding the 12 inorganic ions and 10 heavy metals, NH4+ exceeded the Chinese standards for drinking water with an exceedance rate of 25.93%, and the exceedance rates of Al, Mn, and Hg were 11.11%, 44.44%, and 37.04%, respectively. The spatiotemporal scaling effect on inorganic ions was lower than that of heavy metals, and the distributions of the inorganic ions and heavy metals were in the order of wet period>normal period>dry period. However, the surface water quality in the Huixian karst wetland was generally well-protected based on the pollution assessment. The Nemerow index ranged from 0.75 to 2.69, which recognized the main pollution contributors as NH4+, Mn, Al, and Hg with the contamination grade from slight pollution to moderate pollution, especially in the core area during the wet period. According to the limits of standards for irrigation water quality and environmental quality for surface water, as well as the evaluation results of the SAR, SC, PI, and RSC, the surface water in the Huixian karst wetland was generally suitable for irrigation, and the water quality in the dry period was better than that in the wet and normal periods. The surface water from site PH1 during the normal period with 19.1 μg•L-1 of Hg and site FH8 during the wet period with 13.7 mg•L-1 of NH4+ were not suitable for agricultural irrigation.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Surface waters Controlled terms:Agricultural robots - Drought - Heavy metals - Ions - Irrigation - Manganese removal (water treatment) - Mercury (metal) - Petroleum reservoir evaluation - Potable water - Quality control - River pollution - Sodium Carbonate - Sodium compounds - Water quality - Wetlands Uncontrolled terms:Agricultural irrigation - Environmental quality - Hydrochemical characteristics - Irrigation water quality - Permeability index - Pollution assessment - Residual sodium carbonate (RSC) - Sodium adsorption ratio Classification code:444 Water Resources - 444.1 Surface Water - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 453 Water Pollution - 512.1.2 Petroleum Deposits : Development Operations - 531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.3 Agricultural Methods - 913.3 Quality Assurance and Control Numerical data indexing:Mass_Density 1.37e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 1.91e-05kg/m3 to 2.20e-02kg/m3, Percentage 1.11e+01%, Percentage 2.59e+01%, Percentage 3.70e+01%, Percentage 4.44e+01% DOI:10.13227/j.hjkx.202010087 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239945 Title:Characteristics and Influencing Factors of the Dissolved Methane and Nitrous Oxide Concentrations and Emissions from a Rice Paddy Drainage River in China Title of translation:稻田灌溉河流 CH4和N2O排放特征及影响因素 Authors:Wu, Shuang (1, 2); Yang, Wei-Tong (1); Sheng, Yang-Yue (1); Fang, Xian-Tao (1); Zhang, Tian-Rui (1); Hu, Jing (1); Liu, Shu-Wei (1, 2); Zou, Jian-Wen (1, 2) Author affiliation:(1) College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China; (2) Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, Nanjing; 210095, China Corresponding authors:Liu, Shu-Wei(swliu@njau.edu.cn); Liu, Shu-Wei(swliu@njau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6014-6024 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
With the increase in fertilizer application, a large amount of carbon and nitrogen enters the irrigation water around farmland through leaching and runoff, which makes it become an important source of methane (CH4) and nitrous oxide (N2O) emissions. In this study, the dynamic characteristics of dissolved CH4 and N2O concentrations and emissions were observed from Sept. 2014-Sept. 2016. The purpose of this study was to investigate the inventory and the influencing factors of CH4 and N2O fluxes from a rice-paddy drainage river. The results showed that the dissolved c(CH4) in the rice-paddy drainage river ranged from 92.80 to 1 577.54 nmol•L-1, with an annual mean value of (390.57±43.95) nmol•L-1. The dissolved c(N2O) in the rice-paddy drainage river ranged from 10.05 to 75.40 nmol•L-1, with an annual mean value of (40.23±3.20) nmol•L-1. The annual mean fluxes of CH4 and N2O were (20.73±6.08) mg•(m2•h)-1 and (34.30±7.12) μg•(m2•h)-1, respectively. The seasonal variations in dissolved CH4 and N2O concentrations and fluxes were similar with higher concentrations, and fluxes appeared in spring and summer; lower concentrations and fluxes appeared in fall and winter. The two-year total annual emissions of CH4 and N2O were (3 876.30±1 153.96) kg•hm-2 and (5.74±0.98) kg•hm-2, respectively. The annual mean value of the sustained-flux global warming potential (SGWP100a, CO2-eq) over the time span of 100 years was(87.99±15.73)t•(hm2•a)-1. The CH4 fluxes were positively correlated with water temperature and sediment-dissolved organic carbon (DOC), while negatively correlated with water dissolved oxygen (DO) concentration in the rice-paddy drainage river. Meanwhile, the N2O fluxes were positively correlated with water temperature, ammonium nitrogen (NH4+-N), and nitrate nitrogen (NO3--N), while negatively correlated with water dissolved oxygen (DO) concentration. This study may provide important reference for further understanding of total CH4 and N2O emissions of agricultural irrigation watersheds.
© 2021, Science Press. All right reserved. Number of references:52 Main heading:Nitrogen oxides Controlled terms:Dissolution - Dissolved oxygen - Global warming - Irrigation - Methane - Nitrogen fertilizers - Organic carbon - Rivers Uncontrolled terms:Annual mean - CH 4 - Dissolved concentrations - Drainage river - Emission - Influencing factor - Methane (CH4) - Nitrous oxide - Nitrous oxide (N2O) - Rice paddy Classification code:443.1 Atmospheric Properties - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals - 821.3 Agricultural Methods Numerical data indexing:Age 1.00E+02yr, Amount of substance 1.005E-08mol to 7.54E-08mol, Amount of substance 5.7754E-07mol DOI:10.13227/j.hjkx.202104100 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239950 Title:Effect of Corn Stalk Biochar on the Adsorption of Aureomycin from Sierozem Title of translation:玉米秸秆生物炭对灰钙土吸附金霉素的影响 Authors:Nan, Zhi-Jiang (1); Jiang, Yu-Feng (1); Mao, Huan-Huan (1); Liang, Xin-Ru (1); Deng, Xue-Ru (1) Author affiliation:(1) School of Environment and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China Corresponding author:Jiang, Yu-Feng(jiangyf7712@lzjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5896-5904 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In order to study the effect of biochar (BC) addition on the adsorption of aureomycin (CTC) fromsierozem (HGT), BC was prepared from corn stalks at 200, 400, and 600℃, respectively. The adsorption behavior of CTC on HGT and HGT+BC was studied using the batch equilibrium method. The results showed that the equilibrium time of CTC adsorption by HGT was 240 min, and the equilibrium time was relatively prolonged by adding BC, which was in line with the pseudo-second-order adsorption kinetic model. The overall adsorption rate of CTC was controlled by both surface diffusion and intra-particle diffusion, the surface diffusion rate was faster, and the hydrophobic distribution promoted the adsorption. The adsorption of CTC in HGT and HGT+BC showed a good correlation among the three isothermal adsorption models. The addition of BC increased the adsorption distribution coefficient Kd value of HGT to CTC, and the affinity was enhanced. The difference of distribution coefficient Kd at different temperatures indicates that the adsorption process is an exothermic reaction. The results revealed different adsorption isothermal lines (L and S type) and the heterogeneity of chemical adsorption in the complex adsorption process, along with the electrostatic force and hydrogen bond interaction in the surface adsorption and physical adsorption. When the pH=3, CTC+ combined with negative sites on the surface of the soil large, cation exchange and electrostatic attraction, the adsorption capacity was the largest. The pH increased, and the CTC existence form changed, weakening the adsorption ability of HGT and BC. BC always enhanced HGT under CTC adsorption at various pHs, and the greater the amount added, the greater the CTC adsorption distribution coefficient Kd values. Adsorption is the result of the joint action of organic matter content, mineral composition, physical and chemical properties, CTC form, and HGT and BC environmental factors. Studies have shown that the appropriate addition of BC has a positive effect on the adsorption of CTC by HGT, and the effect is most significant when the pyrolysis temperature is 200℃, which can effectively promote the adsorption and fixation of CTC by HGT.
© 2021, Science Press. All right reserved. Number of references:38 Main heading:Adsorption Controlled terms:Antibiotics - Hydrogen bonds - Isotherms - Surface diffusion - Temperature control Uncontrolled terms:Adsorption behaviour - Adsorption process - Batch equilibrium method - Biochar - Corn stalk - D values - Distribution coefficient - Equilibrium time - Kinetic adsorption - Thermodynamic adsorption Classification code:461.6 Medicine and Pharmacology - 731.3 Specific Variables Control - 801.4 Physical Chemistry - 802.3 Chemical Operations Numerical data indexing:Time 1.44E+04s DOI:10.13227/j.hjkx.202103284 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239866 Title:Stress and Post Effects of Azithromycin and Copper on Archaeal Community and ARGs in Activated Sludge Title of translation:阿奇霉素和铜对活性污泥古菌群落和ARGs的胁迫影响及后效应 Authors:Gao, Yu-Xi (1); Li, Xing (1); Zhao, Jun-Ru (1); Zhang, Zhong-Xing (1); Fan, Xiao-Yan (1) Author affiliation:(1) Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology, Beijing; 100124, China Corresponding author:Fan, Xiao-Yan(fanxy@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5921-5929 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The combined pollution of antibiotics and heavy metals has become a research hotspot in the field of environmental research. However, studies on the ecological effects of the combined pollution on activated sludge systems have mainly focused on the bacterial community, ignoring the archaeal community, which plays several important roles. In this study, azithromycin (AZM) and copper (Cu) were selected to investigate the short-term and post-effect of different concentrations of AZM (0.05-40 mg•L-1) on an archaeal community, antibiotic resistance genes (ARGs), and their interactions at low temperatures when copper was maintained at 1 mg•L-1. The results showed that the diversity of archaea increased with the increase in AZM concentration; however, the richness decreased, and both recovered to a certain extent during the post-effect period. It was found that different concentrations of AZM led to variations in microbial community structure based on the full-scale classification method. The archaeal community structure was divided into three groups, and the post-effect influence was not obvious. The effects of combined pollution on the structure of the abundant taxa were greater than that of the rare taxa. Moreover, the variation in the conditionally rare taxa (CRT) was consistent with that of the whole archaeal community. There were specific genera with different resistance and recovery characteristics in different taxa, which had different responses to the combined pollution of AZM and copper. The resistance of abundant taxa to combined pollution was significantly stronger than that of the rare taxa, of which Methanosaeta, Methanobacterium, and Methanosarcina were the dominant resistant archaeal genera. A total of 29 ARGs were obtained using prediction analysis, and AZM caused the proliferation of ARGs, especially at high concentrations; however, the effects on each subtype of ARGs were different. The co-occurrence patterns were mainly observed among the archaeal community and ARGs during the stress-effect and post-effect periods. Among them, CAT was the core taxa in the microbial interaction network. However, rare taxa (RT) represented an important ecological niche during the stress-effect period. Meanwhile, both co-occurrence and co-exclusion patterns existed among ARGs. A variety of archaeal genera were positively correlated with ARGs, and they were the potential hosts of ARGs. In particular, Methanobrevibacter and Methanolobus may carry a variety of ARGs. Overall, this study could provide new insight and theoretical basis for the risk assessment of the combined pollution of antibiotics and heavy metals in wastewater treatment systems and the removal of ARGs.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Copper Controlled terms:Antibiotics - Genes - Heavy metals - Microorganisms - Pollution - Recovery Uncontrolled terms:Activated sludge - Antibiotic resistance genes - Archaeal - Archaeal community - Azithromycin - Combined pollutions - Full-scale classification - Interaction - Rare taxa - Stress effects Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 461.9 Biology - 531 Metallurgy and Metallography - 544.1 Copper Numerical data indexing:Mass 1.00E-06kg, Mass 5.00E-08kg to 4.00E-05kg DOI:10.13227/j.hjkx.202104135 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239895 Title:Effects of Different Types of Straw Returning on the Bacterial Community, Organic Carbon Mineralization and Maize Yield in Upland Red Soil Title of translation:不同秸秆还田方式对旱地红壤细菌群落,有机碳矿化及玉米产量的影响 Authors:Kong, Pei-Jun (1, 2); Zheng, Jie (1, 2); Luan, Lu (1); Chen, Zi-Yun (1); Xue, Jing-Rong (1); Sun, Bo (1); Jiang, Yu-Ji (1) Author affiliation:(1) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Jiang, Yu-Ji(yjjiang@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:6047-6057 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the effects of straw returning on the bacterial community, organic carbon mineralization, and maize yield in an upland red soil, a long-term field experiment (established in 2011) with different types of straw returning in a corn mono-cropping system was performed at the National Agro-Ecosystem Observation and Research Station in Yingtan. The diversity and structure of the soil bacterial community were evaluated under five treatments (CK, no fertilizer; N, chemical fertilizer; NS, chemical fertilizer with straw; NSM, chemical fertilizer with straw and manure; and NB, chemical fertilizer with biochar) using high-throughput sequencing technology. The effect of the bacterial community on maize yield and soil organic carbon (SOC) mineralization was revealed. The results showed that fertilization treatments significantly changed the chemical properties of the red soil, such that the NSM treatment had the highest level of soil fertility and the maximal maize yield. The straw returning treatments (NS, NSM, and NB) significantly increased the bacterial diversity compared to that under the CK and N treatments. The principal component analysis (PCA) indicated that the straw returning treatments significantly affected the bacterial community structure. Straw returning significantly improved SOC mineralization capacity, with the maximal SOC accumulation and mineralization rate under the NSM treatment. Correlation analysis indicated that the structure of the soil bacterial community was greatly influenced by the AN/AP ratio. Structural equation modeling suggested that the AN/AP ratio may indirectly improve SOC mineralization capacity and maize yield by shaping the bacterial diversity and community structure. Our results provide the basis for synergistically improving the microbial diversity and soil fertility and protecting the health of red soil ecosystems and food security.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Bacteria Controlled terms:Ecosystems - Fertilizers - Food supply - Mineralogy - Organic carbon - Principal component analysis - Soils Uncontrolled terms:Bacterial community - Carbon mineralization - Chemical fertilizers - Dry land - Dryland red soil - Maize yield - Organic carbon mineralization - Red soils - Soil organic carbon - Straw returning Classification code:454.3 Ecology and Ecosystems - 482 Mineralogy - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.2 Agricultural Chemicals - 822.3 Food Products - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.202103170 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214811239940 Title:Chemical Characteristics and Source Apportionment with Temporal Refinement for VOCs in Tianjin Suburb in Summer Title of translation:天津市郊夏季 VOCs化学特征及其时间精细化的来源解析 Authors:Wang, Yi-Xuan (1); Liu, Bao-Shuang (1); Wu, Jian-Hui (1); Zhang, Yu-Fen (1); Feng, Yin-Chang (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China Corresponding author:Liu, Bao-Shuang(lbsnankai@foxmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:12 Issue date:December 15, 2021 Publication year:2021 Pages:5644-5655 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Summer is a period with frequent ozone pollution events in the air. It is very important to identify the source apportionment of ambient volatile organic compounds (VOCs) and their ozone formation potential (OFP) to effectively prevent and control ozone pollution. The hourly resolution VOC online data for Tianjin Suburb during the summer of 2019 (June to August) were applied to analyze the variation characteristics of ambient VOCs and their OFP during ozone pollution events and non-ozone pollution periods, and the refined source apportionment of the ambient VOCs and their OFP was carried out by using the positive matrix factorization (PMF) model. The results showed that the mean volume fraction of ambient VOCs in summer was 24.42 × 10-9. The average volume fraction of ambient VOCs in ozone pollution events was 27.72 × 10-9, 15.69% higher than that in the non-ozone pollution period. The OFP of total VOCs (TVOCs) in summer was 87.92×10-9, of which olefin was the highest, contributing 58.28% to the OFP of TVOCs. The OFP of TVOCs in the ozone pollution events was 102.8×10-9, increased 19.59% compared to the non-ozone pollution period. The contributing sources of ambient VOCs in ozone pollution events were the petrochemical industry and gasoline volatilization (29.44%), diesel vehicle exhaust (23.52%), liquefied petroleum gas (LPG)/gasoline vehicle exhaust (22.00%), natural gas/combustion (13.41%), solvent use (6.14%), and plant emissions (5.49%). Compared with that in the non-ozone pollution period, LPG/gasoline vehicle exhaust and diesel vehicle exhaust increased by 4.84% and 5.29%, respectively. The contribution of the petrochemical industry and gasoline volatilization as well as plant emissions began to increase at 8:00 and reached the highest at 11:00, which was closely related to the increase in solar radiation and ambient temperature. Both LPG/gasoline vehicle exhaust and diesel vehicle exhaust showed obvious morning and evening peaks and maintained a high contribution level at night (00:00-06:00). Combining the PMF results and the OFP method, the contributions of different sources to the OFP were analyzed. The petrochemical industry and gasoline volatilization (31.01%) and diesel vehicle exhaust (36.64%) were the highest contributors during ozone pollution events, which increased by 1.74% and 8.27%, respectively, compared with those during the non-ozone pollution period. Additionally, its contribution percentage significantly increased during the rising stage of ozone pollution events and clearly decreased in the declining stage.
© 2021, Science Press. All right reserved. Number of references:59 Main heading:Volatile organic compounds Controlled terms:Air pollution - Diesel engines - Factorization - Gas chromatography - Gas emissions - Gasoline - Liquefied petroleum gas - Matrix algebra - Ozone - Petrochemicals - Petroleum industry - Vehicles - Volume fraction Uncontrolled terms:Ambients - Diesel vehicle exhaust - Ozone formation potentials - Ozone pollution - Ozone pollution event - Positive matrix factorization - Source apportionment - Summer - Volatile organic compound Classification code:451 Air Pollution - 513.3 Petroleum Products - 523 Liquid Fuels - 612.2 Diesel Engines - 641.1 Thermodynamics - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics - 921.1 Algebra Numerical data indexing:Percentage 1.341E+01%, Percentage 1.569E+01%, Percentage 1.74E+00%, Percentage 1.959E+01%, Percentage 2.20E+01%, Percentage 2.352E+01%, Percentage 2.944E+01%, Percentage 3.101E+01%, Percentage 3.664E+01%, Percentage 4.84E+00%, Percentage 5.29E+00%, Percentage 5.49E+00%, Percentage 5.828E+01%, Percentage 6.14E+00%, Percentage 8.27E+00% DOI:10.13227/j.hjkx.202104318 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804552 Title:Precision of eDNA Metabarcoding Technology for Biodiversity Monitoring of Eukaryotic Phytoplankton in Lakes Title of translation:环境DNA宏条形码监测湖泊真核浮游植物的精准性 Authors:Zhang, Li-Juan (1); Xu, Shan (2, 3); Zhao, Zheng (2, 3); Zhou, Xiao-Hua (2, 3); Feng, Qing (2, 3); Yang, Jiang-Hua (1); Li, Fei-Long (1); Wang, Zhi-Hao (1); Zhang, Xiao-Wei (1, 2, 3) Author affiliation:(1) State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China; (2) Kunming Dianchi Lake Environmental Protection Collaborative Research Center, Kunming University, Kunming; 650214, China; (3) Academician Workstation for Ecological Health Assessment and Rehabilitation of Rivers and Lakes in Kunming, Kunming; 650214, China Corresponding author:Zhang, Xiao-Wei(zhangxw@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:796-807 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Environmental DNA (eDNA) metabarcoding provides a fast and efficient way to obtain biodiversity information that has been widely used in aquatic biodiversity monitoring and assessment. To facilitate the application of eDNA metabarcoding in China, the accuracy of metabarcoding data needs to be further assessed. Here, the eukaryotic phytoplankton in Dianchi Lake and the northern portion of Fuxian Lake were examined. The effect of sequencing depth on species diversity was also explored, and accuracy was evaluated by comparing the taxon overlap and coefficient of variation (CV) of the α diversity index among biological replicates. The results showed that: ① Sequencing depth significantly affected the taxon number and accuracy of alpha diversity determinations. The suggested sequencing depth for metabarcoding of eukaryotic phytoplankton in Dianchi Lake and Fuxian Lake is at least 30 000. ② The OTU overlap was 45.97%±1.67% among three biological replicates, the genera overlap was 64.21%±3.25%, and the CV of alpha diversity was less than 10%. ③ Seventy-five and 90 genera of eukaryotic algae were identified in Dianchi Lake and Fuxian Lake, respectively, covering 62.5% and 71.05% of the morphologically detected species, respectively. ④ There was no significant variation in the diversity of eukaryotic algae with depth in Dianchi Lake, while diversity showed significant vertical patterns in Fuxian Lake. Overall, eukaryotic algal diversity was significantly lower in Dianchi Lake compared to Fuxian Lake, and diversity in the southern portion of Dianchi Lake was significantly higher than that in the central and northern portions (P<0.05). Our study demonstrates the feasibility and accuracy of using eDNA-based techniques to monitor eukaryotic phytoplankton diversity, which supports the widespread application of eDNA metabarcoding in China.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Lakes Controlled terms:Biodiversity - Phytoplankton Uncontrolled terms:Aquatic biodiversity - Biodiversity monitoring - Coefficient of variation - Dianchi lakes - Diversity index - Eukaryotic algae - Phytoplankton diversities Classification code:454 Environmental Engineering - 471 Marine Science and Oceanography Numerical data indexing:Percentage 1.00e+01%, Percentage 6.25e+01%, Percentage 7.10e+01% DOI:10.13227/j.hjkx.202007236 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065979 Title:Interactive Effects of the Influencing Factors on the Changes of O3 Concentrations Based on GAMs Model in Chengdu Title of translation:基于GAMs模型分析成都市气象因子交互作用对O3浓度变化的影响 Authors:Zhang, Ying (1, 2); Ni, Chang-Jian (1); Feng, Xin-Yuan (1); Wang, Shi-Gong (1); Zhang, Xiao-Ling (1, 3); Zhang, Jia-Xi (1); Li, Yun-Chao (1) Author affiliation:(1) Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu; 610225, China; (2) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (3) Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing; 100089, China Corresponding author:Ni, Chang-Jian(ncj1970@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5228-5238 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the influence characteristics of the interaction effects between meteorological factors on ozone(O3)concentration in Chengdu, daily air pollutants and meteorological data from 2014 to 2019 were collected. Generalized additive models(GAMs)were adopted to explore the effects of different factors on O3 concentration. The results showed that the relationship between O3 and maximum temperature, sunshine hours, relative humidity, wind speed, precipitation, maximum mixed depth(MMD), and ventilation coefficient(VC)was non-linear. Specifically, the maximum temperature, sunshine hours, MMD, and relative humidity had a significant influence on O3 concentration throughout the year. It is worth noting that the influence of relative humidity and precipitation on O3 concentration during summer was more significant than that for the whole year. In the multi-meteorological factors GAMs of O3 concentration, the meteorological factors mentioned above, except average wind, had significant impacts on O3 concentration change. For the whole year, the judgment coefficient(R2)was 0.849 and the variance explanation rate was 85.1%. The maximum temperature was the most important influencing factor on O3 concentration throughout the year. During summer, corresponding R2 was 0.811 and the explanation rate of variance was 81.3%; however, maximum temperature and MMD were the dominant meteorological factors. In the interaction GAMs, for the whole year, the interaction between maximum temperature and sunshine hours, relative humidity, and precipitation, and the interaction between sunshine hours and MMD had a significant impact on O3 concentrations. The interaction between maximum temperature and sunshine hours played a leading role in changes of O3 concentration. The high temperature+strong radiation+MMD(about 2 000 m)+no precipitation were conducive to the formation of O3 concentration, but in summer, only the maximum temperature, sunshine hours, and VC had the most significant effect on the O3 concentration, and strong high temperatures+strong radiation+the little horizontal wind in summer were conducive to the formation of O3 concentration near the surface. In summary, GAMs model can not only be used to identify the dominant influencing factors of O3 pollution, but also quantitatively analyze the influence of single effects and interaction of influencing factors on O3 concentration, which has great significance for the prevention and control of O3 pollution.
© 2021, Science Press. All right reserved. Number of references:27 Main heading:Wind Controlled terms:Additives - Air pollution - Meteorology Uncontrolled terms:Change of O3 concentration - Chengdu - Chengdu city - Generalized additive model - High-temperature strong - Influencing factor - Interactive effect - Maximum temperature - Meteorological factors - Sunshine Hour Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 803 Chemical Agents and Basic Industrial Chemicals Numerical data indexing:Percentage 8.13E+01%, Percentage 8.51E+01%, Size 0.00E00m DOI:10.13227/j.hjkx.202102056 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311065968 Title:Emission Characteristics and Environment Impacts of VOCs from Typical Rubber Manufacture Title of translation:典型橡胶制品业 VOCs排放特征及对周边环境影响 Authors:Wang, Hai-Lin (1); Xin, Guo-Xing (2); Zhu, Li-Min (2); Xue, Song (1); Nie, Lei (1); Hao, Run (1) Author affiliation:(1) Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) Hengshui Municipal Research Institute of Environmental Sciences, Hengshui; 053000, China Corresponding author:Hao, Run(haorun@cee.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5193-5200 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The emission characteristics of VOCs from three typical rubber manufacture industries were studied by GC-MS/FID. Maximum incremental reactivity(MIR)and fractional aerosol coefficient(FAC)were employed to evaluate the ozone formation potential(OFP)and secondary organic aerosol(SOA)formation potential. The results show that the VOC types emitted from the manufacturing of rubber products mainly include alkanes, ketones, aldehydes, alcohols, and benzene series. For traditional rubber products manufactured through rubber mixing and vulcanization, the main pollutants are ketones and alcohols, whereas for production processes involving gluing and painting, the main pollutants belong to the benzene series. In terms of ozone impact, the traditional processes contribute to ozone formation mainly through oxygenated hydrocarbons. In industries that utilize adhesives and paints, the extensive use of these organic solvents lead to a significantly higher contribution of the benzene series than other VOC species to ozone formation; the benzene series account for 82.9% of the total contribution. In terms of SOA impact, the benzene series are the main contributor to SOA, whereas the contribution of VOCs from traditional processes is small; hence, SOA primarily originates from the gluing and painting processes. Therefore, in traditional production of rubber products through rubber mixing and vulcanization, the emission of oxygenated hydrocarbons should be preferentially controlled, whereas for rubber industries utilizing gluing and painting processes, the emission of benzene series should be preferentially controlled.
© 2021, Science Press. All right reserved. Number of references:32 Main heading:Ketones Controlled terms:Adhesives - Aerosols - Benzene - Mixing - Ozone - Rubber products - Volatile organic compounds Uncontrolled terms:Emission characteristics - Environment impact - Organic aerosol - Oxygenated hydrocarbon - Ozone formaiton potential - Ozone formation - Rubber mixing - Rubber product industry - Rubber vulcanization - Secondary organic aerosol Classification code:802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 818.5 Rubber Products Numerical data indexing:Percentage 8.29E+01% DOI:10.13227/j.hjkx.202103145 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651051 Title:Effects of Different Nitrite Generation on the Short-cut Nitrification Denitrifying Phosphorus Removal Granules System Title of translation:亚硝酸盐不同生成方式对短程硝化反硝化除磷颗粒系统的影响 Authors:Wang, Wen-Qi (1); Li, Dong (1); Gao, Xin (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China Corresponding author:Li, Dong(lidong2006@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3858-3865 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To explore the effects of nitrite generation on the system of short-cut nitrification denitrifying phosphorus removal granules, nitrite was produced continuously and intermittently, under continuous and intermittent aeration, in two groups of SBR reactors of the same size. The effects of nitrogen and phosphorus removal, physical characteristics of the sludge, and microbial community structure were investigated. Nitrite was consumed immediately after intermittent production, with better and more stable nitrogen and phosphorus removal performance. In particular, the average rate of TN removal was 92.07% after 72 days. The utilization efficiency of the carbon source (by P/COD) was concentrated at 0.21- 0.22 mg•mg-1, to ensure full utilization of the carbon source and to further promote denitrification and phosphorus removal. Particle sizes were uniform and showed concentrated distribution, with particles exhibiting regular shapes and clear boundaries. Microbial community analysis showed that the abundance and diversity of microbial communities were higher in the intermittent nitrite system and more enriched in DPAOs genera (Dechloromonas and Pseudomonas). The combination of DPAOs genera and Nitrosomonas resulted in a dynamic balance and stable operation of the short-cut nitrification and denitrifying phosphorus removal system.
© 2021, Science Press. All right reserved. Number of references:26 Main heading:Nitrogen removal Controlled terms:Carbon - Denitrification - Granulation - Microorganisms - Nitrification - Nitrogen - Particle size analysis - Phosphorus Uncontrolled terms:Denitrifying phosphorus removal - Intermittent aeration - Microbial communities - Microbial community analysis - Microbial community structures - Nitrogen and phosphorus removal - Physical characteristics - Utilization efficiency Classification code:461.9 Biology - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Age 1.97e-01yr, Percentage 9.21e+01% DOI:10.13227/j.hjkx.202101242 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651076 Title:Pollution Characteristics and Source Apportionment of Atmospheric VOCs During Ozone Pollution Period in the Main Urban Area of Chongqing Title of translation:重庆市主城区O3污染时期大气 VOCs污染特征及来源解析 Authors:Li, Ling (1); Li, Zhen-Liang (1); Zhang, Dan (1); Fang, Wei-Kai (1); Xu, Qin (1); Duan, Lin-Feng (2); Lu, Pei-Li (2); Wang, Feng-Wen (2); Zhang, Wei-Dong (1); Zhai, Chong-Zhi (1) Author affiliation:(1) Key Laboratory for Urban Atmospheric Environment Integrated Observation & Pollution Prevention and Control of Chongqing, Chongqing Research Academy of Eco-Environmental Sciences, Chongqing; 401147, China; (2) College of Environment and Ecology, Chongqing University, Chongqing; 400030, China Corresponding author:Li, Zhen-Liang(zhenliangli@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3595-3603 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
In late August 2020, a period of O3 pollution occurred in the main urban area of Chongqing and lasted for approximately 2 weeks (till early September). Ambient air samples, collected using Summa Canisters and DNPH sampling columns at three observation sites in the main urban area, were used to study the composition, photochemical reaction activity, and source apportionment of volatile organic compounds (VOCs) during the period of O3 pollution. The results showed that the mean volume fraction of TVOCs in the main urban area of Chongqing during the observation period was 45.08×10-9, and the components were ranked by volume fraction in the following order: OVOCs, alkanes, halohydrocarbons, alkenes, aromatics, and alkynes. Formaldehyde, ethylene, and acetone made up the higher volume fraction of VOCs, together accounting for more than 30% of TVOCs. OVOCs and alkenes contributed more to •OH loss rate (Li•OH) and ozone formation potential (OFP) and were the key VOCs components for ozone generation. The main active species in the OVOCs component were formaldehyde, acetaldehyde, and acrolein; the main active species in the alkene component were isoprene, ethylene, and n-butene. The ratio of xylene to ethylbenzene in VOCs was low, and they showed a significant correlation, indicating that the VOCs air mass in the main urban area was highly aging and affected by long-distance transmission from other areas. The source apportionment results of the PMF model showed five main sources of VOCs, namely secondary generation (27.67%), vehicle exhaust (26.56%), industrial emission (17.86%), plant (14.51%), and fossil fuel combustion (13.4%).
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Air pollution Controlled terms:Acetone - Aliphatic compounds - Ethylene - Formaldehyde - Fossil fuels - Industrial emissions - Ozone - Photochemical reactions - Urban growth - Volatile organic compounds - Volume fraction Uncontrolled terms:Fossil fuel combustion - Halohydrocarbons - Long distance transmission - Observation Period - Ozone formation potentials - Ozone generation - Source apportionment - Vehicle exhausts Classification code:403.1 Urban Planning and Development - 451 Air Pollution - 451.1 Air Pollution Sources - 641.1 Thermodynamics - 741.1 Light/Optics - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Age 3.84e-02yr, Percentage 1.34e+01%, Percentage 1.45e+01%, Percentage 1.79e+01%, Percentage 2.66e+01%, Percentage 2.77e+01%, Percentage 3.00e+01% DOI:10.13227/j.hjkx.202101119 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651024 Title:Effect of Elevated CO2 on N2O Emissions from Different Rice Cultivars in Rice Fields Title of translation:大气CO2摩尔分数升高对高, 低应答水稻稻田N2O排放的影响 Authors:Yu, Hai-Yang (1, 2); Huang, Qiong (1, 2); Wang, Tian-Yu (1, 2); Zhang, Guang-Bin (1); Ma, Jing (1); Zhu, Chun-Wu (1); Xu, Hua (1) Author affiliation:(1) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Xu, Hua(hxu@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3924-3930 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Using the free air CO2 enrichment (FACE) platform, an in-situ field experiment was conducted to explore the impacts of elevated CO2 mole fraction (x[CO2]) on N2O emissions from strongly and weakly responsive rice cultivars. Under elevated x[CO2], grain yield of the strongly responsive rice cultivars increased significantly, by more than 30%, whereas the weakly responsive cultivars showed a growth rate of 10%- 15%. The four treatments comprised A-W (normal x[CO2]+weakly responsive cultivar), F-W (elevated x[CO2]+weakly responsive cultivar), A-S (normal x[CO2]+strongly responsive cultivar), and F-S (elevated x[CO2]+strongly responsive cultivar). Compared to the normal x[CO2] treatments (A-S and A-W), when the strongly and weakly responsive cultivars were exposed to elevated x[CO2](F-S and F-W), N2O emissions decreased by 52.54% (P<0.05) and 38.40% (P<0.05), rice yield increased by 22.96% (P<0.05) and 12.11% (P>0.05), and N2O emission intensity decreased by 61.68% (P<0.05) and 45.13% (P<0.05), respectively. Moreover, N2O emissions of all treatments were significantly positively correlated with NH4+-N content (P<0.05), whereas not correlated with NO2--N content. Soil temperature is an important factor affecting the N2O emissions of the strongly responsive cultivar in rice fields under elevated x[CO2] conditions. Through comprehensive consideration of climate conditions, in the future, priority should be given to planting the strongly responsive cultivar, ensuring high rice yield and significant reduction in N2O emissions.
© 2021, Science Press. All right reserved. Number of references:33 Main heading:Growth rate Controlled terms:Carbon dioxide Uncontrolled terms:Climate condition - CO2 enrichment - Elevated CO2 - Emission intensity - Field experiment - Mole fraction - Rice cultivars - Soil temperature Classification code:804.2 Inorganic Compounds Numerical data indexing:Percentage 1.00e+01% to 1.50e+01%, Percentage 3.00e+01% DOI:10.13227/j.hjkx.202012211 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651066 Title:Responses of Different Degradation Stages of Alpine Wetland on Soil Microbial Community in the Yellow River Source Zone Title of translation:黄河源区高寒沼泽湿地土壤微生物群落结构对不同退化的响应 Authors:Lin, Chun-Ying (1, 2); Li, Xi-Lai (1); Zhang, Yu-Xin (2); Sun, Hua-Fang (1); Li, Cheng-Yi (1); Jin, Li-Qun (1); Yang, Xin-Guang (3); Liu, Kai (4) Author affiliation:(1) College of Agriculture and Animal Husbandry, Qinghai University, Xining; 810016, China; (2) Qinghai Province Weather Modification Office, Xining; 810000, China; (3) College of Ecological Environment and Resources, Qinghai Nationalities University, Xining; 810007, China; (4) Qinghai Provincial Grassland Station, Xining; 810008, China Corresponding author:Li, Xi-Lai(xilai-li@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3971-3984 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
MiSeq sequencing technology was used to analyze the microbial community diversity of soil in alpine wetlands to understand the degradation processes and environmental factors in these areas. The results showed that the severity of soil degradation changed the species diversity of soil microorganisms at the level of OTUs, and grass patches contained more species than frozen-thawing patches. The soil fungi species of OTUs changed significantly. The diversity indexes of bacteria (between the frozen-thawing patches and the grass patches) were higher than that of fungi. The dominant microbial species were consistent among different degradation stages. The dominant species of bacteria and fungi were Proteobacteria and RB41, and Ascomycota and Mortierella, respectively. The abundance of dominant microorganisms was significantly between un-degraded and heavily degraded areas, except for RB41 (P<0.05). The dominant microorganisms in the grass patches were more sensitive than those in the frozen-thawing patches. It was found that the main factors affecting the microbial community structure of soil were water content, organic carbon, microbial biomass carbon, microbial biomass nitrogen, and sedge coverage. Microbial diversity may decrease in heavily degraded alpine wetlands. Thus, the frozen-thawing patches and sedge species should be first protected, and the supplements of soil water content, soil organic carbon, microbial biomass carbon, and nitrogen should be strengthened for alpine wetland restoration.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Bacteria Controlled terms:Biodegradation - Biomass - Degradation - Environmental technology - Fungi - Nitrogen - Organic carbon - Soil moisture - Thawing - Wetlands Uncontrolled terms:Degradation process - Environmental factors - Microbial biomass carbon - Microbial communities - Microbial community structures - Microbial diversity - Soil micro-organisms - Soil microbial community Classification code:454 Environmental Engineering - 461.8 Biotechnology - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202011072 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651062 Title:Sources and Spatial Variation of Dissolved Organic Matter in Summer Water of Inflow Rivers Along Chaohu Lake Watershed Title of translation:夏季巢湖入湖河流溶解性有机质来源及其空间变化 Authors:Ning, Cheng-Wu (1); Bao, Yan (1); Huang, Tao (1); Wang, Jie (1) Author affiliation:(1) Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, School of Resources and Environmental Engineering, Anhui University, Hefei; 230601, China Corresponding author:Huang, Tao(huangt@ahu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3743-3752 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The sources and spatial variations of dissolved organic matter (DOM) in summer water of inflow rivers (FL, HB, QY, ZH, and NF) along the Chaohu Lake watershed were analyzed using the ultraviolet-visible absorption spectrum (UV-vis) method and three-dimensional excitation emission matrix fluorescence spectroscopy-parallel factor analysis (EEM-PARAFAC). The specific ultraviolet absorbance of DOM at 254 nm in the NF river was lower than in other rivers, and the spectral slope ratio (SR) of the NF river was higher than that of the HB river. This showed that the urban runoff inputs reduce the aromaticity of DOM in the NF river water, but has little effect on the molecular weight. The high fluorescence index (FI) and biological index, and the low humification index, indicated the main autochthonous sources of the DOM in the NF river. Four humic-like components (C1-C4), comprising terrestrial organic matter (C1, C3, and C4) and microbial degradation products (C2), and two protein-like components (C5 and C6) were identified as the main sources of DOM in the inflow rivers along the Chaohu Lake watershed. The dissolved organic carbon and DOM fluorescence components in the river water exhibited spatial variation along the direction of flow. The DOM in water from FL, HB, QY, and ZH was sourced from soil runoff inputs, whereas in NF water, it was mainly sourced from urban runoff and wastewater treatment plant effluents.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Effluents Controlled terms:Absorption spectroscopy - Biodegradation - Biogeochemistry - Degradation - Dissolution - Fluorescence - Fluorescence spectroscopy - Lakes - Organic carbon - Rivers - Runoff - Sewage - Sewage treatment plants - Wastewater treatment - Water absorption - Watersheds Uncontrolled terms:Dissolved organic carbon - Dissolved organic matters - Excitation-emission matrix fluorescence spectroscopies - Parallel factor analysis - Specific ultraviolet absorbance - Terrestrial organic matter - Ultraviolet-visible absorption spectrum - Wastewater treatment plant effluent Classification code:444.1 Surface Water - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.8 Biotechnology - 481.2 Geochemistry - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Size 2.54e-07m DOI:10.13227/j.hjkx.202012089 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651038 Title:Optimization of Tidal-Combined Flow Constructed Wetland System and Its Removal Effect on Antibiotic Resistance Genes Title of translation:潮汐-复合流人工湿地系统优化及对抗生素抗性基因的去除效果 Authors:Cheng, Yu-Xiao (1, 2); Wu, Dan (1, 2); Chen, Quan-Le (1, 2); Gao, Fang-Zhou (1, 2); Yang, Yong-Qiang (3); Liu, You-Sheng (1, 2); Ying, Guang-Guo (1, 2) Author affiliation:(1) School of Environment, South China Normal University, Guangzhou; 510006, China; (2) Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou; 510006, China; (3) State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China Corresponding author:Liu, You-Sheng(yousheng.liu@m.scnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3799-3807 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Antibiotic resistance genes (ARGs) pose a serious threat to environmental biology and public health, along with the discharge and spread of wastewater. The advanced treatment of ARGs in wastewater therefore deserves special attention. In our previous study, we found that tidal flow constructed wetlands can effectively remove multiple ammonia from wastewater. In this study, we further optimized tidal flow constructed wetland systems by adding baffles and cultivating plants; we investigated the influence of process optimization on the removal of ARGs and the influence of functional microorganism distribution on nitrogen removal. The results show that the addition of baffles and plants can effectively improve the removal efficiency of ARGs, with the maximum removal rate of 21 resistance genes, in 7 categories, reaching 83.82%- 100.0% with the simultaneous addition of baffles and plants. These removal rates were significantly higher than the increase resulting from a single baffle or plant group. From the comparison of the absolute abundance of ARGs in the substrate and plants, it is clear that the baffles can promote the enrichment of ARGs in the wetland substrate, while uptake by plants is also a way of removing ARGs. Combined with the results of nitrogen-cycle functional gene sequencing, system optimization can increase the diversity and richness of nitrification and denitrification functional microorganisms in the substrate, which is consistent with the higher removal rate of nitrification and total nitrogen in wastewater.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Nitrogen removal Controlled terms:Ammonia - Antibiotics - Genes - Health risks - Microorganisms - Nitrification - Optimization - Plants (botany) - Wastewater treatment - Wetlands Uncontrolled terms:Advanced treatment - Antibiotic resistance genes - Constructed wetlands - Functional genes - Nitrification and denitrification - Removal efficiencies - System optimizations - Tidal flow constructed wetlands Classification code:452.4 Industrial Wastes Treatment and Disposal - 461 Bioengineering and Biology - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 921.5 Optimization Techniques Numerical data indexing:Percentage 8.38e+01% to 1.00e+02% DOI:10.13227/j.hjkx.202012168 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20210309804507 Title:Distribution Characteristics and Pollution Evaluation of Heavy Metals in Greenbelt Soils of Nanjing City Title of translation:南京市绿地土壤重金属分布特征及其污染评价 Authors:Chen, Jia-Lin (1); Li, Ren-Ying (1); Xie, Xiao-Jin (1); Wang, Hong (2); Xu, Jing (2); Shao, Jing (2); Jian, Jing (1); Wuerman, Akejuli (1); Shen, Jia (1); Yang, Zong (1) Author affiliation:(1) Department of Agricultural Resources and Environment, College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Nanjing Academy of Landscape and Forestry, Nanjing; 210037, China Corresponding author:Li, Ren-Ying(ryli2005@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:2 Issue date:February 15, 2021 Publication year:2021 Pages:909-916 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Concentrations and the spatial distribution of heavy metals (Cr, Cu, Zn, Pb, and Cd) in greenbelt soils in the main areas of Nanjing City, Jiangsu Province, were investigated and pollution levels were assessed using the single factor pollution index (SFPI), Nemerow integrated pollution index (NIPI), and potential ecological risk coefficient (PERC). The results showed that the average concentrations of heavy metals in greenbelt soils exceeded their background values, with the SFPI results ranked Cd>Pb>Cr>Cu>Zn, and the mean NIPI was 2.72 indicating that the greenbelt soils are moderately polluted. The PERC of each heavy metal (Cr, Cu, Zn, and Pb) was less than 10, indicating that the greenbelt soils present a slight ecological risk, while the PERC of Cd reached 97.32, indicating a strong ecological risk. The composite PERC of all heavy metals was less than 150, indicating a slight ecological risk overall. The five heavy metals showed a patchy spatial distribution, with high concentrations of Cr, Cu, Zn, and Pb in the greenbelt soils of northeast areas, and high concentrations of Cd in the southwest and northwest. Based on the results of study, Cd pollution in greenbelt soils in main areas of Nanjing City is relatively serious, which requires further attention.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Soil pollution Controlled terms:Cadmium - Cadmium compounds - Copper compounds - Lead compounds - Risk assessment - Soil surveys - Soils - Spatial distribution - Zinc compounds Uncontrolled terms:Average concentration - Background value - Distribution characteristics - Ecological risks - Integrated pollution indices - Jiangsu province - Pollution evaluation - Potential ecological risk Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1 Accidents and Accident Prevention - 921 Mathematics DOI:10.13227/j.hjkx.202005203 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651046 Title:Investigation of Dominant Plants and Analysis of Ecological Restoration Potential in Lailishan Tin Tailings Title of translation:来利山锡尾矿区优势植物调查与生态修复潜力分析 Authors:Qin, Fu-Rong (1); Zhang, Shi-Ying (1, 2); Xia, Yun-Sheng (1, 2); Zhang, Nai-Ming (1, 2); Wu, Cheng-Long (1); He, Zhong-Jun (1); Yue, Xian-Rong (1); Tian, Sen-Lin (3) Author affiliation:(1) College of Resources and Environment, Yunnan Agricultural University, Kunming; 650201, China; (2) Yunnan Engineering Laboratory of Soil Fertility and Pollution Remediation, Kunming; 650201, China; (3) College of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming; 650500, China Corresponding author:Xia, Yun-Sheng(yshengxia@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3963-3970 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To investigate the dominant plants in ecological restoration of tin mining areas, field investigations were conducted in a tin tailings area in Lailishan, Yunnan Provence, and 15 dominant plants and corresponding rhizosphere soils were collected. The plant root mycorrhizal infection rate; the copper (Cu), cadmium (Cd), arsenic (As), nickel (Ni), lead (Pb), and tin (Sn) contents; and the chemical properties of the rhizosphere tailings were determined. The transfer and enrichment coefficients of six heavy metals were calculated for each of the 15 plants to comprehensively evaluate the application potential of native plants. The rhizophere tailings had an average pH value of 3.13, which was acidic. The organic matter, total nitrogen, total phosphorus, total potassium, alkaline hydrolyzed nitrogen, and available phosphorus content of the soils was 6.07 g•kg-1, 5.74 g•kg-1, 0.62 g•kg-1, 8.66 g•kg-1, 30.84 mg•kg-1, and 2.08 mg•kg-1 respectively, indicating relatively nutrient-poor soil. The average Cu, Cd, Ni, Pb, As, and Sn contents of the soils were 347.40, 1.02, 1.34, 168.47, 25.81, and 2 299.02 mg•kg-1, respectively. Among the heavy metals, the Cd content reached a third-level pollution warning value. The soil also contained a large amount of Cu and Pb which exhibited a different spatial distribution. This area appears to have a high risk of Cu, Pb, and Cd pollution. In addition, the roots of Olea europaea L. and Eurya japonica Thunb. had a high rate of mycorrhizal infection. Alnus cremastogyne Burk., Bambusa multiplex (Lour.) Raeusch. ex Schult. 'Alphonse-Kar' R. A. Young, Juncus effusus L., and Cyperus rotundus L. var. had a strong ability to absorb and transport heavy metals. The other plants were also adapted to the growth environment of the tin tailings, with the potential to restore the mining area.
© 2021, Science Press. All right reserved. Number of references:39 Main heading:Soils Controlled terms:Alkalinity - Heavy metals - Nitrogen - Phosphorus - Pollution - Restoration - Tin mines Uncontrolled terms:Available phosphorus - Ecological restoration - Enrichment coefficients - Field investigation - Mycorrhizal infections - Nutrient-poor soils - Rhizosphere soils - Total phosphorus Classification code:483.1 Soils and Soil Mechanics - 504.3 Heavy Metal Mines - 531 Metallurgy and Metallography - 801.1 Chemistry, General - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202009008 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066039 Title:Preparation of Mixed Metal Oxide/Carbon Composites and Its Adsorption Performance for Pb(Ⅱ) Title of translation:混合金属氧化物/碳复合材料的制备及其对Pb(Ⅱ)的吸附性能 Authors:Lu, Yu-Shen (1, 2); Zong, Li (1); Yu, Hui (1, 2); Mu, Bin (1); Wang, Ai-Qin (1, 2) Author affiliation:(1) Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Materials and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; 730000, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding authors:Wang, Ai-Qin(aqwang@licp.cas.cn); Wang, Ai-Qin(aqwang@licp.cas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5450-5459 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Layered double hydroxides, which can be synthesized from metal ions and their analogs, have abundant interlayer ions, surface functional groups, and adsorption characteristics that have been extensively studied. But the adsorption-desorption process may cause secondary pollution of the environment. In this study, the layered double hydroxides that adsorbed Congo red were converted into mixed metal oxide/carbon composites by a calcining carbonization method, and its adsorption performance for heavy metal ions Pb(Ⅱ) in aqueous solution was studied in detail. The results show that the prepared mixed metal oxide/carbon composites have a faster adsorption rate and higher adsorption capacity for Pb(Ⅱ). The adsorption capacity reached more than 150 mg•g-1 in 30 min, and increased with the content of Mg2+ introduced into the layered double metal hydroxide, reaching a maximum of 368 mg•g-1. The removal mechanism of Pb(Ⅱ) by mixed metal oxide/carbon composites was caused by the formation of insoluble Pb3(CO3)2(OH)2 on the surface. This research lays the foundation for the application of mixed metal oxide/carbon composites in the remediation of lead-containing soils.
© 2021, Science Press. All right reserved. Number of references:40 Main heading:Adsorption Controlled terms:Azo dyes - Carbonization - Heavy metals - Lead compounds - Metal ions Uncontrolled terms:Adsorption mechanism - Adsorption performance - Carbon composites - Composites material - Interlayer ion - Layered-double hydroxides - Mixed metal oxide - Pb(ⅱ) - Surface functional groups - Synthesised Classification code:531 Metallurgy and Metallography - 531.1 Metallurgy - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds Numerical data indexing:Mass 1.50E-04kg, Mass 3.68E-04kg, Time 1.80E+03s DOI:10.13227/j.hjkx.202104040 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20214311066052 Title:Contrasting Analysis of Microbial Community Composition in the Water and Sediments of the North Canal Based on 16S rRNA High-Throughput Sequencing Title of translation:基于16S rRNA高通量测序的北运河水体及沉积物微生物群落组成对比分析 Authors:Peng, Ke (1); Dong, Zhi (2); Di, Yan-Ming (3); Guo, Xiao-Yu (1) Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Sohool of Life Sciences, Peking University, Beijing; 100871, China; (3) Beijing North Canal Management Division, Beijing; 101100, China Corresponding author:Guo, Xiao-Yu(xiaoyucnu@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:11 Issue date:November 15, 2021 Publication year:2021 Pages:5424-5432 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
As the bridge of pollutant exchange between sediments and aquatic ecosystems, microorganisms play an important role in material circulation. However, there are few comparative studies of microorganisms in water and sediment of urban rivers with unconventional water supply, sluice dam, and lining closure. The highly artificial area of Beijing-Tianjin-Hebei section of the North Canal was chosen for this study. We analyze the differences of microbial community composition in water and sediment using high-throughput sequencing. The results show that the microbial communities in the sediments of the North Canal have higher α-diversity than those in the water. With regards to β-diversity, the similarity of microbial communities in the water is higher than that in the sediment. There is no significant difference in the abundance of Proteobacteria between water and sediments. The abundance of α-Proteobacteria, Actinobacteria, Cyanobacteria, and Verrucomicrobia was higher in water than that of sediment, while the abundance of γ-Proteobacteria, δ-Proteobacteria, Chloroflexi, Firmicutes, and Acidobacteria was higher in sediments than that of water. Aerobic or facultative anaerobes dominated the microbial aquatic system, while anaerobes dominated the sediments. The risk of bacteria releasing pathogens from the sediment into the water habitat is high. The research results provide a scientific basis for revealing the mechanism of microbial community change under river pollution risk in highly artificial reclaimed water.
© 2021, Science Press. All right reserved. Number of references:42 Main heading:Sediments Controlled terms:Aquatic ecosystems - Discriminant analysis - Hydraulic structures - Microorganisms - River pollution - RNA - Water supply Uncontrolled terms:16S rRNA - Community structures - Diversity - Effect size - High-throughput sequencing - Linear discriminant analyse of effect size - Linear discriminant analyze - Microbial communities - Microbial community composition - Proteobacteria Classification code:446.1 Water Supply Systems - 453 Water Pollution - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 483 Soil Mechanics and Foundations - 903.1 Information Sources and Analysis - 922 Statistical Methods DOI:10.13227/j.hjkx.202104122 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945419 Title:Conversion Characterizations of Sulfate Ion and Nitrate Ion in Particulate Matter from Coal-fired Power Plants Title of translation:燃煤电厂颗粒物中硫酸根与硝酸根离子的转化规律 Authors:Yang, Liu (1); He, Qing (1); Sheng, Zhong-Yi (1, 2) Author affiliation:(1) School of Environment, Nanjing Normal University, Nanjing; 210023, China; (2) Suzhou Industrial Technology Research Institute of Zhejiang University, Suzhou; 215163, China Corresponding authors:Sheng, Zhong-Yi(09377@njnu.edu.cn); Sheng, Zhong-Yi(09377@njnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4678-4686 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The particulate matter emitted from coal-fired power plants includes condensable particulate matter(CPM)and filterable particulate matter(FPM). By analyzing the concentration of SO42-and NO3- components of CPM and FPM in the inlet/outlet of wet flue gas desulfurization(WFGD)and the outlet of wet electrostatic precipitator(WESP)from 7 ultra-low emission coal-fired power plants, the variation laws and transformation characteristics were investigated. The results showed that the concentration of SO42- and NO3- of CPM decreased after WFGD, with reduction rates of 43.12%-86.84% and 17.99%-91.58%, respectively, which were different from the conversion trend of FPM. The concentrations of SO42- and NO3- of CPM increased after WESP, with reduction rates of 21.05%-424.65% and 13.51%-298.37%, respectively, which were also different from that of FPM. In the WFGD system, CPM could be transformed into FPM due via condensation and aggregation under the decreasing temperature and increasing of humidity of the flue gas. In the WESP system, SO2 and NO2 in the flue gas combine with water vapor in a redox reaction, which promotes the generation of SO42- and NO3- in CPM through synergistic action.
© 2021, Science Press. All right reserved. Number of references:36 Main heading:Fossil fuel power plants Controlled terms:Coal - Coal fueled furnaces - Desulfurization - Electrostatic precipitators - Electrostatics - Flue gases - Flues - Gas plants - Particles (particulate matter) - Redox reactions Uncontrolled terms:Condensable particle matter - Conversion characterization - Filterable particulate matter - NO3- - Particle matter - Particulate Matter - Reduction rate - SO 4 2- - Wet electrostatic precipitators - Wet flue gas desulfurization Classification code:451.1 Air Pollution Sources - 522 Gas Fuels - 524 Solid Fuels - 701.1 Electricity: Basic Concepts and Phenomena - 704.2 Electric Equipment - 802.2 Chemical Reactions - 951 Materials Science Numerical data indexing:Percentage 1.351E+01% to 2.9837E+02%, Percentage 1.799E+01% to 9.158E+01%, Percentage 2.105E+01% to 4.2465E+02%, Percentage 4.312E+01% to 8.684E+01% DOI:10.13227/j.hjkx.202101097 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945416 Title:Effect of Manure from Different Sources on the Leaching of Antibiotics in Soil Title of translation:施用不同来源粪肥对土壤中抗生素淋溶的影响 Authors:Li, Bin-Xu (1); Zhu, Chang-Xiong (1); Song, Ting-Ting (1); Ma, Jin-Lian (2); Zhang, Zhi-Guo (1); Li, Hong-Na (1) Author affiliation:(1) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (2) Water Resources Bureau of Gong'an County, Jingzhou; 434300, China Corresponding author:Li, Hong-Na(lihongna828@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4942-4950 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Antibiotic residues in farmland soils resulting from the application of livestock manure poses risks to the soil and water ecology associated with the spread of antibiotic resistance, thereby threatening environmental safety and human health. Here, a leaching experiment was carried out using soil(CK-T), pig manure(PM-T), cow manure(CM-T), and chicken manure(CHM-T)with the addition of tetracyclines(tetracycline, oxytetracycline, and chlortetracycline)and a control group(without antibiotics). The effects of different sources of manure on soil physical and chemical indicators and bacterial abundance under simulated leaching conditions were studied, while the migration of tetracyclines in the different treatments were also determined. The results showed that compared with the CHM-T and CM-T treatments, the tetracyclines in the PM-T treatment were more easily accumulated in the soil(residual amounts=0.90-6.91 mg•kg-1 compared to the other treatments=0.33-4.42 mg•kg-1). Compared with the surface soil(0-4 cm), higher concentrations of tetracyclines were detected at soil depths of 16-24 cm. Consistent with the residues of antibiotics, the concentrations of TN and NH4+-N in the soil with the PM-T treatment were increased by 0.044 g•kg-1 and 14.11 mg•kg-1, respectively, which were significantly higher than other treatments. The abundance of bacteria in the soil was reduced due to the bactericidal effect of antibiotics, by 39.66% in the PM-T treatment, which was significantly higher than in the other treatments(12.38%-35.26%). Compared with other treatments, the antibiotics in the CHM-T treatment were more easily leached from the soil, with 9.91 mg of antibiotics in the leachate, which was significantly higher than the other treatments(P< 0.05). TN, NH4+-N, tetracycline, oxytetracycline, and chlortetracycline were the first principal component factors, accounting for 54.55% of the variation, and corresponding concentrations increased with soil depth. Based on these results, tetracyclines in pig manure tended to accumulate in soil and transfer vertically along with variations in the soil microbial community. For chicken manure, relatively high concentrations of tetracyclines were detected in the soil leachate, increasing the risk of water pollution.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Soils Controlled terms:Agriculture - Antibiotics - Fertilizers - Health risks - Indicators (chemical) - Leaching - Mammals - Manures - Principal component analysis Uncontrolled terms:Antibiotic residues - Chicken manure - Chlortetracyclin - Farmland soils - Livestock manure - Manure - Migration - NH 4 + N - Pig manures - Soil depth Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.2 Agricultural Chemicals - 821.5 Agricultural Wastes - 922.2 Mathematical Statistics Numerical data indexing:Mass 1.00E-06kg, Mass 1.411E-05kg, Mass 3.30E-07kg to 4.42E-06kg, Mass 4.40E-05kg, Mass 9.00E-07kg to 6.91E-06kg, Mass 9.91E-06kg, Percentage 1.238E+01% to 3.526E+01%, Percentage 3.966E+01%, Percentage 5.455E+01%, Size 0.00E00m to 4.00E-02m, Size 1.60E-01m to 2.40E-01m DOI:10.13227/j.hjkx.202101112 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945154 Title:Partial Nitritation and Anaerobic Ammonia Oxidation Synergistic Denitrification to Remove Nitrogen and Carbon from Domestic Sewage Title of translation:部分亚硝化-厌氧氨氧化协同反硝化处理生活污水脱氮除碳 Authors:Qin, Yan-Rong (1, 2, 3); Yuan, Zhong-Ling (1, 2, 3); Zhang, Ming (1, 2, 3); Zhang, Min-An (1, 2, 3); Liu, An-Di (1, 2, 3); Fu, Xue (1, 2, 3); Ma, Juan (1, 2, 3); Chen, Yong-Zhi (1, 2, 3) Author affiliation:(1) School of Environment and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou; 730070, China; (3) Technical Center of Sewage Treatment Industry in Gansu, Lanzhou; 730070, China Corresponding authors:Chen, Yong-Zhi(476411589@qq.com); Chen, Yong-Zhi(476411589@qq.com); Chen, Yong-Zhi(476411589@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4853-4863 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
A sequencing batch reactor-anaerobic sequencing batch reactor(SBR-ASBR)process was used to treat domestic sewage. In the SBR, the effects of the anoxic/aerobic time ratio and temperature on the realization of partial nitritation(PN)were investigated. In the ASBR, the effects of different COD/NO2--N(C/N)ratios on the removal of nitrogen and carbon using anaerobic ammonia oxidation(ANAMMOX)and denitrification were studied. The results illustrated that: ① After three single cycles and on the 22nd day, the NO2--N accumulation rate(NiAR)was 98.06%, and the nitrate nitrogen generation rate(SNiPR, calculated as N/VSS)was 0.28g•(g•d)-1, and simultaneous nitrification and denitrification removal the TN and COD were 12.29 and 110.36mg•L-1, respectively(temperature=25℃, anoxic/aerobic time ratio=30 min: 30 min). ② At an anoxic/aerobic time ratio of 30 min: 30 min, the filamentous sludge bulked, the sludge activity decreased, and sludge settleability was poor at 15℃. Furthermore, the conversion rate of NH4+-N to NO2--N was 86.83%, indicating that the effluent NH4+-N concentration was too low to provide suitable matrix concentrations for ANAMMOX at 30℃. The effluent concentrations of NH4+-N and NO2--N were 31.58 mg•L-1 and 35.04mg•L-1, respectively, matching the ratio of the ANAMMOX substrate at 25℃. ③ The SBR-ASBR combined process showed good denitrification performance; the effluent TN, NH4+-N, and COD concentrations were stable at 13.13, 4.83, and 69.96mg•L-1, respectively, and the removal rates were 83.10%, 93.64%, and 75.11%, respectively. When the influent C/N of the ASBR was 2.5, 2.0, and 1.5, respectively, anaerobic ammonia oxidation and denitrification showed the best performance with respect to nitrogen and carbon removal with a C/N of 2.0. The effluent NH4+-N, NO2--N, NO3--N, and COD were 0.09, 0.25, 1.04, and 32.73 mg•L-1, respectively.
© 2021, Science Press. All right reserved. Number of references:45 Main heading:Denitrification Controlled terms:Ammonia - Batch reactors - Chemical oxygen demand - Nitrification - Nitrogen - Nitrogen oxides - Nitrogen removal - Oxidation - Sewage - Wastewater treatment Uncontrolled terms:Ammonia oxidation - Anaerobic ammonium oxidation - Anaerobics - Anoxic/aerobic time ratio - COD/NO2--N - Domestic sewage - Intermittent aeration - NH 4 + N - NO 2 - Partial nitritation Classification code:452.1 Sewage - 452.4 Industrial Wastes Treatment and Disposal - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass 1.00E-06kg, Mass 1.1036E-04kg, Mass 1.229E-05kg, Mass 2.80E-04kg, Mass 3.158E-05kg, Mass 3.273E-05kg, Mass 3.504E-05kg, Mass 6.996E-05kg, Percentage 7.511E+01%, Percentage 8.31E+01%, Percentage 8.683E+01%, Percentage 9.364E+01%, Percentage 9.806E+01%, Time 1.80E+03s DOI:10.13227/j.hjkx.202101229 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213310779851 Title:Reactivation of Passivated Biochar/Nanoscale Zero-Valent Iron by an Electroactive Microorganism for Cooperative Hexavalent Chromium Removal and Mechanisms Title of translation:电活性微生物激活生物质炭/零价铁协同钝化Cr(Ⅵ)及机制 Authors:Liao, Cong-Jian (1, 2, 3, 4); Zhao, Xiao-Lei (2, 5); Liu, Kai (1, 2, 3, 4); Zhong, Song-Xiong (1, 2, 3, 4); Li, Fang-Bai (2, 3); Fang, Li-Ping (2, 3); Ye, Ting-Jin (6); Shi, Hu-Yan (6) Author affiliation:(1) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China; (2) Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou; 510650, China; (3) National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou; 510650, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China; (5) College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan; 030024, China; (6) Foshan Environmental Protection Investment Co., Ltd., Foshan; 528100, China Corresponding author:Li, Fang-Bai(cefbli@soil.gd.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:9 Issue date:September 15, 2021 Publication year:2021 Pages:4520-4526 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Nanoscale zero-valent iron (nZVI) shows excellent reduction of Cr(Ⅵ), but the passivation on its outer surface can restrict its longevity and performance. To tackle this problem, this work introduced Shewanella oneidensis MR-1, a dissimilatory iron-reducing bacterium, into the chemical reduction system of aged nZVI/biochar (B) and Cr(Ⅵ). The potential synergistic effect of Cr(Ⅵ) reduction of aged nZVI/B and MR-1 was systematically investigated under varying conditions. The results indicated that aged nZVI/B and MR-1 exhibited a synergistic effect at a pH of 7, and the removal rate of Cr(Ⅵ) increased by 51.3%. Further research showed that the synergistic effect could be attenuated with the increase in the initial Cr(Ⅵ) concentration and enhanced with the increase in the MR-1 concentration. The XPS spectra confirmed that Cr(Ⅵ) was mainly removed through reduction. The dissimilatory iron-reducing ability of MR-1 played a key role in enhancing the Cr(Ⅵ) reduction. The reductive dissolution of the oxidation layers not only released reactive sites inside the nZVI, but also reduced Cr(Ⅵ) by producing ferrous ions. Moreover, B promoted the reduction by dispersing the nZVI and mediating the extracellular electron transfer. This study provides a new insight into solving the passivation problem of the long-term application of nZVI for Cr(Ⅵ) removal, which is considered a promising solution for synergistically improving the performance of nZVI in environmental remediation.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Iron Controlled terms:Bacteria - Chromium - Electron transport properties - Passivation Uncontrolled terms:Chemical reduction - Environmental remediation - Extracellular electron transfer - Hexavalent chromium removals - Iron reducing bacteria - Nanoscale zero-valent iron - Reductive dissolution - Shewanella oneidensis MR-1 Classification code:539.2.1 Protection Methods - 543.1 Chromium and Alloys - 545.1 Iron Numerical data indexing:Percentage 5.13e+01% DOI:10.13227/j.hjkx.202010021 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945464 Title:Analysis of the Traits of Nitrogen Metabolism Pathways for Several Forest Soils in Eastern China Title of translation:我国典型森林土壤微生物驱动的氮代谢途径特征解析 Authors:Lü, Xue-Li (1); Zhao, Yong-Peng (1); Lin, Qing-Huo (2); Peng, Xian-Long (3); Yin, Yun-Feng (4); Jiang, Xian-Jun (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou; 571101, China; (3) College of Resources and Environment, Northeast Agricultural University, Harbin; 150030, China; (4) State Key Laboratory of Subtropical Mountain Ecology, Fujian Normal University, Fuzhou; 350007, China Corresponding author:Jiang, Xian-Jun(jiangxj@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4951-4958 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Nitrogen metabolism pathways mediated by microorganisms play an important role in maintaining the structure and functional stability of soil ecosystems. Clarifying the relationships between microbial communities and nitrogen metabolism pathways can expand our understanding of nitrogen metabolism pathways at a microscopic level. However, the horizontal gene transfer of microorganisms means that taxonomy-based methods cannot be easily applied. A growing number of studies have shown that functional traits affect community construction and ecosystem functions. Using methods based on functional traits to study soil microbial communities can, therefore, better characterize nitrogen metabolism pathways. Here, five typical forest soils in China, namely black soil(Harbin, Heilongjiang), dark-brown earth(Changbaishan, Jilin), yellow-brown earth(Wuhan, Hubei), red earth(Fuzhou, Fujian), and humid-thermo ferralitic soil(Ledong, Hainan), were selected to study the traits of nitrogen metabolism pathways using metagenomic technology combined with the trait-based methods. The studied nitrogen metabolism pathways were ammonia assimilation, nitrate dissimilatory reduction, nitrate assimilatory reduction, denitrification, nitrification, nitrogen fixation, and anaerobic ammonia oxidation. The results showed that bacteria dominated the metagenomic library, accounting for 98.02% of all the sequences. Across all domains, the most common pathway was ammonia assimilation. For example, an average of 2 830 ammonia assimilation pathway genes were detected for every million annotated bacterial sequences. In comparison, nitrogen fixation and anaerobic ammonia oxidation were the least detected pathways, accounting for 28.3 and 10.7 per million sequences, respectively. Different microorganisms can participate in a same nitrogen metabolism pathway, and the community structure of different soils was variable. The five typical forest soils in China show the same microbial nitrogen metabolism pathway traits; however, the community structure of the microorganisms mediating these processes was found to vary.
© 2021, Science Press. All right reserved. Number of references:43 Main heading:Soils Controlled terms:Ammonia - Bacteria - Ecosystems - Forestry - Gene transfer - Genes - Metabolism - Nitrates - Nitrogen fixation Uncontrolled terms:% reductions - Ammonia assimilations - Anaerobics - Forest soils - Function trait - Functional traits - Metagenomes - Microbial community structures - Nitrogen metabolism - Nitrogen metabolism pathway Classification code:454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 461.8.1 Genetic Engineering - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 821.0 Woodlands and Forestry Numerical data indexing:Percentage 9.802E+01% DOI:10.13227/j.hjkx.202101250 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945315 Title:Denitrification Rates and nirS-type Denitrifying Bacteria Community Structure Characteristics of Bulk and Rhizosphere Soil in Spring and Summer in the Alpine Wetlands of the Qinghai-Tibet Plateau Title of translation:青藏高原高寒湿地春夏两季根际与非根际土壤反硝化速率及nirS型反硝化细菌群落特征分析 Authors:Li, Yu-Qian (1); Ma, Jun-Wei (1); Gao, Chao (1); Huo, Shou-Liang (2); Xia, Xing-Hui (1) Author affiliation:(1) School of Environment, Beijing Normal University, Beijing; 100875, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Ma, Jun-Wei(jwma@bnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4959-4967 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Denitrification is a key process in the nitrogen cycle of ecosystems. Most existing studies of nitrogen emissions and denitrifying bacterial communities are carried out in ecosystems with significant human interference, yet few focus in natural ecosystems with low human disturbance. Here, the denitrification rates and characteristics of nirS-type denitrifying bacterial communities in rhizosphere and bulk soils from alpine wetland plants at different altitudes(Tangke, Jiuzhi, Maduo, and Dari)and seasons(spring and summer)in the Yellow River source region of the Qinghai-Tibet Plateau were investigated. The 15N isotope tracer technique was used to estimate the denitrification rates, and high-throughput sequencing technology was used to determine the composition and relative abundance of nirS-type denitrifying bacterial communities. We also investigated the environmental factors(temperature and altitude)and soil physical and chemical properties(pH, soil organic carbon, ammonia, nitrate, and nitrite)controlling the denitrification and related microorganisms. The results show that the denitrification rates of alpine wetland soils ranged from 0.80 to 14.98 nmol•(g•h)-1, and the contribution to the total N2 production ranged from 11.23% to 71.16%. The soil samples from Tangke, Jiuzhi, and Dari showed higher denitrification rates in rhizosphere soils than the corresponding bulk soils(P< 0.05). Proteobacteria was the most dominate denitrifying bacteria phylum. At the genus level, unclassified Proteobacteria(2.86%-29.41%)showed the highest relative abundance, indicating that unique unidentified bacteria may dominate denitrification in these wetland soils. The genera with the next highest relative abundances were Pseudomonas(2.45%-26.52%)and Cupriavidus(0%-34.14%). Distance-based redundancy analysis showed that the community structure of the nirS-type denitrifying bacteria was mainly affected by altitude, pH, and nitrite concentrations; Pearson correlation analysis showed that denitrification rates and the Shannon index are significantly negatively correlated with soil pH(P< 0.05), and the relative abundance of the main denitrifying bacterial genera were influenced by temperature and soil pH(P< 0.05). This study provides valuable insights for understanding the nitrogen cycle in the unique alpine wetlands of the Qinghai-Tibet Plateau.
© 2021, Science Press. All right reserved. Number of references:44 Main heading:Soils Controlled terms:Ammonia - Bacteria - Chemical analysis - Correlation methods - Denitrification - Ecosystems - Nitrogen - Organic carbon - pH - Redundancy - Wetlands Uncontrolled terms:Alpine wetland - Bulk soils - Community structures - Denitrification rate - Denitrifying bacteria - Environmental factors - Nir - Redundancy analysis - Relative abundance - Rhizospheres soil Classification code:454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Amount of substance 8.00E-10mol to 1.498E-08mol, Percentage 0.00E00% to 3.414E+01%, Percentage 1.123E+01% to 7.116E+01%, Percentage 2.45E+00% to 2.652E+01%, Percentage 2.86E+00% to 2.941E+01% DOI:10.13227/j.hjkx.202101258 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212110403527 Title:Characteristics of Runoff-related Total Nitrogen and Phosphorus Losses Under Long-term Fertilization and Cultivation on Purple Soil Sloping Croplands Title of translation:长期施肥和耕作下紫色土坡耕地径流TN和TP流失特征 Authors:Wu, Xiao-Yu (1); Li, Tian-Yang (1); He, Bing-Hui (1) Author affiliation:(1) Key Laboratory of Eco-environment in the Three Gorges Reservoir Region, Ministry of Education, College of Resources and Environment, Southwest University, Chongqing; 400715, China Corresponding author:He, Bing-Hui(hebinghui@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:6 Issue date:June 15, 2021 Publication year:2021 Pages:2810-2816 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
To elucidate the effects of long-term fertilization and cultivation on runoff rates and runoff-related nitrogen (N) and phosphorus (P) losses, the following five treatments were established on sloping purple soil cropland: ① no fertilizer with downslope tillage (CK), ② combined application of manure and fertilizer with downslope tillage (T1), ③ chemical fertilizers with downslope tillage (T2), ④ chemical fertilizer with increasing fertilization with downslope tillage (T3), and ⑤ chemical fertilizer with contour tillage (T4). The runoff rate, runoff-related total N (TN), and total P (TP) concentrations and their loss rates from 104 erosive rainfall events were determined for the period 2008-2019. Results showed that although runoff rates were not significantly different among the fertilization treatments (P>0.05), runoff was markedly lower in fertilization treatments than in the CK treatment (P<0.05). Runoff-related TN concentrations were significantly higher in the CK compared to the fertilization treatments (P<0.05), while there were no significant differences among the T2, T3, and T4 treatments, which had higher concentrations than the T1 treatment. Runoff-related TP concentrations were significantly higher from the T1, T2, and T3 treatments than the CK treatment (P<0.05), and were significantly lower in the T4 than the CK treatment (P<0.05). TN loss rates were not significantly different among the fertilization treatments (P>0.05), but were all lower than the CK treatment (P<0.05). Furthermore, TP loss rates were not significantly different among the downslope treatments (P>0.05), but were all higher than the contour treatment (P<0.05). Runoff rates showed no significant relationships with TN and TP concentrations in the CK, T1, and T2 treatments but were significantly negatively linearly correlated in T3 (P<0.05) and significantly positively linearly correlated in T4 (P<0.05). These results potentially provide scientific guidance for the prevention and control of agricultural non-point source pollution on sloping croplands in the purple soil area.
© 2021, Science Press. All right reserved. Number of references:30 Main heading:Runoff Controlled terms:Agricultural robots - Cultivation - Nitrogen fertilizers - Phosphorus - Soil pollution control - Soils Uncontrolled terms:Agricultural non-point source pollutions - Chemical fertilizers - Long-term fertilization - Prevention and controls - Purple soils - Rainfall event - Sloping croplands - Total nitrogen Classification code:442.1 Flood Control - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 821.3 Agricultural Methods DOI:10.13227/j.hjkx.202009221 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20213910945177 Title:Role of Borate and Phosphate Buffers in the Degradation of Organic Compounds in a PMS/Co2+ System: Influencing Factors and Mechanisms Title of translation:硼酸和磷酸对PMS/Co2+均相催化氧化有机物的影响因素与机制 Authors:Wan, Qi-Qi (1, 2); Chen, Zhu-Hao (1, 2); Cao, Rui-Hua (1, 2); Wang, Jing-Yi (1, 2); Wen, Gang (1, 2) Author affiliation:(1) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Key Laboratory of Environmental Engineering, School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding authors:Wen, Gang(hitwengang@163.com); Wen, Gang(hitwengang@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:10 Issue date:October 15, 2021 Publication year:2021 Pages:4789-4797 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Peroxymonosulfate(PMS)-based advanced oxidation processes were widely used for the degradation of organic pollutants. Electron-rich azo dye Acid Orange 7(AO7)was selected as the target organic matter in this work. The differences, influencing factors, efficiency, and mechanisms of a PMS/Co2+ homogeneous system in the degradation of organic pollutants with two different buffers of boric acid(Lewis acid)and phosphoric acid(Bronstede acid)were investigated. The k value of AO7 degradation in the PMS/Co2+ homogeneous system with phosphate buffer was greater than that with borate buffer, but the degradation percentage during the first 10 seconds of the reaction was lower in the former case. These differences were affected by buffer concentration, the PMS and Co2+ dosages, and pH. In the phosphate buffer, •OH or SO4-• contributed to organic degradation in the PMS/Co2+ system, while in the borate buffer, the nonradical pathway(1O2)made a critical contribution to the removal of organics. This study provides a reference for the application of different types of buffers in the homogeneous catalysis of PMS.
© 2021, Science Press. All right reserved. Number of references:31 Main heading:Catalysis Controlled terms:Azo dyes - Boric acid - Organic pollutants Uncontrolled terms:Borate buffer - Degradation of organic compounds - Homogeneous system - Organics - Peroxymonosulfate - Peroxymonosulphate - Peroxymonosulphate/co2+ - Phosphate buffers - Radical Classification code:802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Time 1.00E+01s DOI:10.13227/j.hjkx.202103022 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651068 Title:Characterizing Sources and Composition of Chromophoric Dissolved Organic Matter in a Key Drinking Water Reservoir Lake Tianmu Title of translation:重要饮用水源地天目湖水库有色可溶性有机物来源与组成特征 Authors:Zhou, Lei (1, 2); Zhou, Yong-Qiang (1, 2); Zhang, Yun-Lin (1, 2); Zhu, Guang-Wei (1, 2) Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Zhang, Yun-Lin(ylzhang@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3709-3718 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
Lake Tianmu is an important source of drinking water, and its water quality can influence ecosystem service functions. Unraveling the sources and composition of chromophoric dissolved organic matter (CDOM) that can affect water treatment processes is necessary to maintain water supply safety and ecosystem service functioning of Lake Tianmu. Samples were collected monthly in 2017 and analyzed for CDOM absorbance and fluorescent spectra using parallel factor analysis (PARAFAC) to investigate the spatial and temporal variations of CDOM sources and composition in Lake Tianmu. PARAFAC results showed that CDOM in Lake Tianmu was mainly composed of a microbial humic-like component C1 (44.2%±9.8%), followed by a tryptophan-like component C2 (29.2%±4.3%), tyrosine-like component C3 (17.2%±13.1%), and terrestrial humic-like component, C4 was the lowest (9.4%±2.4%). The CDOM abundance a(254) and fluorescence intensities of C1 and C2 were significantly higher in the river mouths than in the downstream lake regions, whereas the spectral slope S275- 295 was significantly lower in the river mouths (t-test, P<0.05), indicating that allochthonous inputs cause an elevated degree of humification and relative increase in the molecular weight of CDOM in the inflowing river mouths. Seasonal differences in CDOM composition were mainly ascribed to the a(254) and fluorescence intensities of C1, C2, and C4 being significantly higher in the summer and autumn than in the winter and spring (t-test, P<0.05). Our results showed that the influences of different seasons on CDOM composition comprise differences in rainfall and runoff input, as well as water temperature, thermal stratification, phytoplankton biomass, and mineralization of CDOM by light and microbes.
© 2021, Science Press. All right reserved. Number of references:54 Main heading:Reservoirs (water) Controlled terms:Amino acids - Biogeochemistry - Chemicals removal (water treatment) - Ecosystems - Fluorescence - Lakes - Organic compounds - Potable water - Rivers - Water quality - Water supply Uncontrolled terms:Chromophoric dissolved organic matter - Ecosystem service functions - Fluorescence intensities - Parallel factor analysis - Phytoplankton biomass - Seasonal differences - Spatial and temporal variation - Water treatment process Classification code:441.2 Reservoirs - 444 Water Resources - 445.2 Water Analysis - 446.1 Water Supply Systems - 454.3 Ecology and Ecosystems - 481.2 Geochemistry - 741.1 Light/Optics - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202012280 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc. Accession number:20212910651070 Title:Microplastic-Induced Alterations to Antibiotic Resistance Genes in Seawater Title of translation:微塑料对海水抗生素抗性基因的影响 Authors:Zhou, Shu-Yi-Dan (1, 2); Zhu, Yong-Guan (1, 2); Huang, Fu-Yi (1, 2) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Huang, Fu-Yi(fyhuang@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:42 Issue:8 Issue date:August 15, 2021 Publication year:2021 Pages:3785-3790 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:
The increasing and combined pollution of microplastics (MPs) and antibiotic resistance genes (ARGs) in aquatic environments is a great ecological and health concern. However, MP-induced alterations to ARGs in seawater is poorly understood, impeding risk assessment of plastics. We profiled the diversity and abundance of ARGs and mobile genetic elements (MGEs) in seawater after the addition of three different MPs (PE, PVC, and PVA) and 49-day aerated incubation.A total of 20, 35, 42, and 64 ARGs were detected in BLK, PE, PVC, and PVA, with 2, 4, 2, and 3 MGEs, respectively. The absolute abundance of ARGs in the seawater aerated with MPs ranged from 4.01×106 copies•L-1 to 1.05×108 copies•L-1. Additionally, the variety and richness of ARGs and MGEs in PVA were significantly higher than in the original seawater, or the seawater aerated with the other two MPs. This indicates that PVA, which is water soluble, could induce more diverse and abundant ARGs in seawater. Significant correlations among ARGs, MGEs, and 16S rRNA genes were observed, implying that the occurrence of MGEs in seawater may accelerate the transmission of ARGs through horizontal gene transfer, and bacterial microorganisms could directly affect the propagation and dissemination of ARGs.
© 2021, Science Press. All right reserved. Number of references:28 Main heading:Seawater Controlled terms:Antibiotics - Gene transfer - Genes - Microplastic - Polyvinyl chlorides - Risk assessment - RNA Uncontrolled terms:16S rRNA gene - Antibiotic resistance genes - Aquatic environments - Combined pollutions - Genetic elements - Health concerns - Horizontal gene transfer - Microplastics Classification code:461 Bioengineering and Biology - 471.4 Seawater, Tides and Waves - 815.1.1 Organic Polymers - 914.1 Accidents and Accident Prevention Numerical data indexing:Age 1.34e-01yr DOI:10.13227/j.hjkx.202101009 Database:Compendex Compilation and indexing terms, Copyright 2022 Elsevier Inc.