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 par