Accession number:20200408070511 Title:Spatio-Temporal Variations and Source Apportionment of Carbonaceous Species in PM2.5 Across Multiple Sampling Locations in the Chengdu Plain Title of translation:成都平原PM2.5中碳质组分时空分布特征与来源 Authors:Shi, Fang-Tian (1); Luo, Bin (2); Zhang, Wei (2); Liu, Pei-Chuan (2); Hao, Yu-Fang (1); Yang, Wen-Wen (1); Xie, Shao-Dong (1) Author affiliation:(1) College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China; (2) Sichuan Environmental Monitoring Centre, Chengdu; 610000, China Corresponding author:Xie, Shao-Dong(sdxie@pku.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:520-528 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the characteristics and sources of carbonaceous aerosols, one-year PM2.5 samples were analyzed for their organic carbon (OC) and elemental carbon (EC) content, following the thermal/optical transmission protocol in three cities [Deyang (DY), Chengdu (CD), and Meishan (MS)] in the Chengdu Plain. The observed annual average concentrations (μg•m^-3) were in the following order: MS (15.8±9.6 OC and 6.6±5.3 EC)>CD (13.0±7.5 OC and 4.7±3.6 EC)>DY (9.6±6.1 OC and 3.4±2.6 EC). Organic matter (1.6OC) and EC was regarded as the total carbonaceous aerosols (TCA) amount, and the TCA/PM2.5 ratios at the three above-mentioned cities were 36%, 34%, and 30% respectively. The EC-trace method was used to estimate secondary organic carbon (SOC), which accounted for 38%, 46%, and 47% of total OC in MS, CD, and DY. Daily variations of OC and EC concentrations exhibited significant daily variations, with simultaneous peaks on Oct. 12th to 13th, 2013, Dec. 2nd to 7th, 2013, and mid-to-late Jan., 2014. The surging concentrations of K⁺during the pollution period implied the contribution of biomass burning to heavy pollution. Six sources were resolved by the positive matrix factorization (PMF) model, whose contributions to the total carbon (TC) were: biomass burning (46%-56%), secondary aerosols (26%-38%), vehicle emission (9%-12%), fugitive dust (3%-4%), coal combustion (2%-3%), and industry emission (1%-2%). Biomass burning activities presented a significant influence on TC throughout the year, especially in autumn and winter.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Organic carbon Controlled terms:Aerosols - Biomass - Coal combustion - Coal dust - Coal industry - Factorization - Pollution - Thermal conductivity Uncontrolled terms:Biomass-burning - Chengdu - Elemental carbon - Secondary organic carbons (SOC) - Source apportionment Classification code:503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 641.1 Thermodynamics - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.00e+00% to 2.00e+00%, Percentage 2.00e+00% to 3.00e+00%, Percentage 2.60e+01% to 3.80e+01%, Percentage 3.00e+00% to 4.00e+00%, Percentage 3.00e+01%, Percentage 3.40e+01%, Percentage 3.60e+01%, Percentage 3.80e+01%, Percentage 4.60e+01%, Percentage 4.60e+01% to 5.60e+01%, Percentage 4.70e+01%, Percentage 9.00e+00% to 1.20e+01% DOI:10.13227/j.hjkx.201908217 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070863 Title:Spatio-Temporal Distribution and Variation Characteristics of Aerosol Optical Properties in Henan Province Title of translation:河南省气溶胶光学特性的时空变化特征 Authors:Zhang, Rui-Fang (1); Yu, Xing-Na (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:600-608 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The temporal variation and spatial distribution characteristics of aerosol optical depth (AOD), aerosol column mass concentration (AMC), and fine mode fraction (FMF) were analyzed based on the aerosol product information obtained from MODIS/Terra C6.1 from 2001 to 2018 in the Henan province. The spatial distribution of AOD and AMC in all seasons are high in the east and low in the west, and high in the north and low in the south, which was related to the special topography, population distribution, and number of enterprises in each region. Meanwhile, the spatial distribution of FMF is opposite to that of AOD and AMC. In spring, AMC was the highest, while FMF was the lowest, indicating that it was mainly affected by dust aerosol in spring. AOD and FMF were the highest in summer, while the AMC was lower, mainly because the high values of AOD in summer were caused by the hygroscopic growth of aerosol. The increase of rainwater scouring and secondary aerosol generation led to the domination of fine-mode aerosols in summer. In autumn and winter, the AOD and AMC were relatively low, and the FMF was slightly higher than in spring. The AOD and AMC in the Henan Province showed a decreasing annual trend, while the FMF exhibited an increasing trend. The average monthly peak-valley difference of AOD, AMC, and FMF decreased after 2011.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Spatial distribution Controlled terms:Aerosols - Optical properties - Springs (components) - Topography Uncontrolled terms:Aerosol optical depths - Aerosol optical property - Distribution characteristics - Fine mode fraction (FMF) - Henan Province - Mass concentration - Spatiotemporal distributions - Variation characteristics Classification code:601.2 Machine Components - 741.1 Light/Optics - 921 Mathematics - 951 Materials Science DOI:10.13227/j.hjkx.201908197 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658121 Title:Bacterial Community Shifts and Nitrogen Removal Characteristics for a SNAD Process Treating Anaerobic Digester Liquor of Swine Wastewater (ADLSW) in a Continuous-Flow Biofilm Reactor (CFBR) Title of translation:连续流SNAD工艺处理猪场沼液启动过程中微生物种群演变及脱氮性能 Authors:Qin, Jia-Wei (1); Xin, Xin (1, 2); Lu, Hang (1); Zhang, Ping-Ping (1); Wang, Lu-Rong (1); Zou, Chang-Wu (1); Guo, Jun-Yuan (1) Author affiliation:(1) College of Resources and Environment, Chengdu University of Information Technology, Chengdu; 610225, China; (2) China-Serbia "the Belt and Road" Joint Laboratory on Environment and Energy, Chengdu; 610225, China Corresponding author:Xin, Xin(xx@cuit.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2349-2357 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To realize a simultaneous partial nitrification, ANAMMOX (anaerobic ammonium oxidation), and denitrification (SNAD) process treating anaerobic digester liquor of swine wastewater (ADLSW) in a continuous-flow biofilm reactor (CFBR), we first gradually increased the influent ammonium (NH4⁺-N) concentration, and then enhanced the ADLSW ratio in the influent during operation; dissolved oxygen (DO) was controlled at (0.4±0.1) mg•L^-1 by adjusting the air flow rate, and the temperature was kept at (30±1)℃. Meanwhile, high-throughput sequencing and quantitative PCR (polymerase chain reaction) techniques were used to analyze the bacterial community shifts and the amount of dominant nitrogen removal bacteria. The results demonstrated that a successful start-up of the SNAD process was accomplished in 150 d, and replacement of the actual biogas slurry was completed in 298 d. The effluent (NO3^--N+NO2^--N)/ΔNH4⁺-N value was less than 0.11, and the average removal rates of NH4⁺-N and TN (total nitrogen) increased to 63.26% and 55.71%, respectively. Moreover, high-throughput sequencing results demonstrated that the dominant microbial populations at phylum level were Chloroflexi (with a relative abundance of 50.78%), Proteobacteria (13.34%), and Planctomycetes (9.26%). The relative abundance of Nitrosomonas increased from 1.55% to 1.98%. In addition, the relative abundance of Candidatus_Brocadia and Candidatus_Kuenenia increased from 0.01% and (<0.01%) to 4.66% and 4.18%, respectively, and the relative abundance of Denitratisoma increased from (<0.01%) to 2.06%. Meanwhile, qPCR analysis showed that the amounts of ammonia-oxidizing bacteria, ANAMMOX, and denitrifying bacteria increased significantly compared with the inoculated sludge. An efficient and stable nitrogen removal rate can be achieved, and the follow-up processing cost can be reduced, by application of the SNAD treatment process for ADLSW.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Nitrogen removal Controlled terms:Ammonia - Bacteria - Biofilms - Bioreactors - Denitrification - Dissolved oxygen - Effluents - Polymerase chain reaction - Wastewater treatment Uncontrolled terms:Ammonia oxidizing bacteria - Anaerobic ammonium oxidation - Denitrifying bacteria - Dominant microbial populations - High-throughput sequencing - Nitrogen removal rates - Partial nitrification - Removal characteristics Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 462.5 Biomaterials (including synthetics) - 801.2 Biochemistry - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.00e-02%, Percentage 1.33e+01%, Percentage 1.55e+00% to 1.98e+00%, Percentage 2.06e+00%, Percentage 4.18e+00%, Percentage 4.66e+00%, Percentage 5.08e+01%, Percentage 5.57e+01%, Percentage 6.33e+01%, Percentage 9.26e+00% DOI:10.13227/j.hjkx.201910018 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658101 Title:Toxicity of Chromium to Root Growth of Barley as Affected by Chromium Speciation and Soil Properties Title of translation:不同价态铬和土壤理化性质对大麦根系毒性阈值的影响 Authors:Fu, Ping-Nan (1); Gong, Xiao-Fei (1); Luo, Li-Yun (1); Wang, Qi (1); Li, Hua-Fen (1) Author affiliation:(1) Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China Corresponding author:Li, Hua-Fen(lihuafen@cau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2398-2405 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Tri-and hexavalent chromium have different chemical properties, and their levels of toxicity to plants are different. However, there is no limit set by the soil environmental quality risk control standard for Cr(Ⅲ) or Cr(Ⅵ). Therefore, studying the ecological toxicity of Cr has important implications for protecting the environment. Based on the dynamics of the Cr(Ⅲ) and Cr(Ⅵ) levels in soil solution collected from eight soils, the toxicity thresholds of the two Cr forms to barley roots were investigated through model calculation and correlation analysis under different soil properties. The results showed that both Cr forms and the soil properties had significant effects on the root length of barley. The effective concentrations of Cr(Ⅲ) added to the soils that led to 10% inhibition (EC10), 50% inhibition (EC50), and no-observed-effect concentrations (NOEC) were significantly higher than those of Cr(Ⅵ). The EC50 of Cr(Ⅲ) ranged from 298.8 to 2 014.1 mg•kg^-1 (6.7-fold variation); the EC50 of Cr(Ⅵ) ranged from 8.0 to 126.6 mg•kg^-1 (15.8-fold variation). Under the same soil conditions, the EC50 of Cr(Ⅲ) was 2.8 to 101.7 times higher than that of Cr(Ⅵ), suggesting the higher phytotoxicity of Cr(Ⅵ) than Cr(Ⅲ). Correlation analysis showed that the pH and soil organic matter were the main factors that influenced the Cr toxicity thresholds, as indicated by the root length of barley. The concentration of chromium in the soil solution was below the detection limit of the TAS-990 when Cr(Ⅲ) was applied at 1280 mg•kg^-1 (or less) to soils, whereas for Cr(Ⅵ), the level was 40 mg•kg^-1 (or less). Cr(Ⅲ) adsorption to the soil was significantly stronger than that of Cr(Ⅵ). The toxicity of Cr(Ⅵ) was significantly higher than that of Cr(Ⅲ), which was also influenced by soil properties.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Toxicity Controlled terms:Chromium - Correlation methods - Environmental protection - Quality control - Soil moisture Uncontrolled terms:Chromium speciation - Correlation analysis - Ecological toxicity - Effective concentration - Environmental quality - Hexavalent chromium - No-observed-effect-concentrations - Soil organic matters Classification code:454.2 Environmental Impact and Protection - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 543.1 Chromium and Alloys - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.00e+01%, Percentage 5.00e+01% DOI:10.13227/j.hjkx.201909261 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658164 Title:Spatial-temporal Distribution of Suspended Solids and Its Sedimentation Flux and Nutrients Effects in Xin'anjiang Reservoir, China Title of translation:新安江水库悬浮颗粒物时空分布,沉降通量及其营养盐效应 Authors:Shi, Peng-Cheng (1, 2); Zhu, Guang-Wei (1); Yang, Wen-Bin (2); Xu, Hai (1); Zhu, Meng-Yuan (1); Liu, Ming-Liang (3); Yu, Zuo-Ming (3); Wu, Zhi-Xu (4); Zheng, Wen-Ting (4); Wang, Yu-Cheng (4); Da, Wen-Yi (1); Hu, Lin-Na (1) Author affiliation:(1) State Key Laboratory of Lake Environment and Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) College of Environmental Science and Engineering, Anhui Normal University, Wuhu; 241003, China; (3) Hangzhou Institute of Environmental Sciences, Hangzhou; 310000, China; (4) Hangzhou Bureau of Ecology and Environment Chun'an Branch, Hangzhou; 311700, China Corresponding author:Zhu, Guang-Wei(gwzhu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2137-2148 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To analyze the spatial-temporal distribution and sedimentation characteristics of suspended solids in reservoirs, high-frequency monitoring of a sediment trap and buoy, combined with three-dimensional water sampling, was conducted and analyzed in Xin'anjiang Reservoir for a year. The results showed that the turbidity data of the buoy has significant correlation with rainfall, inflow, and suspended solids (SS), particularly for SS (P<0.01, R²=0.86). There is an obvious spatial difference in SS between spring and summer, when the rainfall season occurs (river area>transition area>lake area). However, there is little difference in SS concentration between autumn and winter. There is a spatial trend of river area>transition area>lake area (with rates of 27.82, 4.34, and 0.26 g•(m²•d)^-1, respectively), and a temporal trend of spring and summer>autumn and winter. The sedimentation flux of the whole lake is 2.57×10⁶ t•a^-1 combined with the investigation of the four-season SS at 60 points across the whole lake, and the settlement flux in spring and summer is higher than that in autumn and winter. The contents of particulate nitrogen (PN) in JK, XJS, and DB were 6 812, 15 886, and 21 986 mg•kg^-1, and the particulate phosphorus (PP) contents were 2 545, 3 269, and 3 077 mg•kg^-1, respectively. Statistical analysis shows that there is a good exponential relationship between moderate rainfall and turbidity growth rate in the river area of the reservoir (R²=0.81). Moreover, the continuous heavy rainfall affects turbidity in river area, but has little effect on the transition area. The concentration of SS has a good exponential decay with distance from the river to the dam (R²=0.84), especially in spring and summer. Research shows that the average annual deposition rate in Xin'anjiang Reservoir is 0.07%, lower than other large reservoirs in the country; however, there are certain risks in front of the dam because the nutrient sediments are high. The results suggest that reservoir managers should pay attention to water and soil conservation in the watershed to reduce the impact of rainfall on reservoir water quality. Meanwhile, the potential nutrient internal release risk in the downstream area before the dam should be considered.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Reservoirs (water) Controlled terms:Deposition rates - Growth rate - Lakes - Nutrients - Rain - Rivers - Sedimentation - Soil conservation - Springs (components) - Suspended sediments - Turbidity - Water quality Uncontrolled terms:High-frequency monitoring - Particulate phosphorus - Reservoir water quality - Sedimentation characteristic - Sedimentation fluxes - Spatial differences - Spatial-temporal distribution - Water and soil conservations Classification code:441.2 Reservoirs - 443.3 Precipitation - 445.2 Water Analysis - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 601.2 Machine Components - 741.1 Light/Optics - 802.3 Chemical Operations Numerical data indexing:Percentage 7.00e-02% DOI:10.13227/j.hjkx.201910053 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658176 Title:Spatio-temporal Variations in the Characteristics of Water Eutrophication and Sediment Pollution in Baiyangdian Lake Title of translation:白洋淀水体富营养化和沉积物污染时空变化特征 Authors:Liu, Xin (1, 2); Shi, Bin (2); Meng, Jing (2); Zhou, Yun-Qiao (2, 3); Ke, Xin (1); Wang, Tie-Yu (2) Author affiliation:(1) College of Energy and Environment, Shenyang Aerospace University, Shenyang; 110136, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Shi, Bin(binshi@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2127-2136 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Since the establishment of Xiong'an New District, a series of comprehensive pollution control measures have been implemented in Baiyangdian Lake. To evaluate the pollution status and identify the main sources of pollution of Baiyangdian Lake, 30 water samples and 29 sediment samples were collected in the lake. Five water quality indexes (i.e., concentrations of chemical oxygen demand, total phosphorus (TP), total nitrogen (TN), NH4⁺-N, and chlorophyll-a) and three sediment quality indexes (i.e., concentrations of TN, TP, and heavy metals) were measured. Along with historical monitoring data, the spatio-temporal pollution characteristics and their influencing factors in Baiyangdian Lake were analyzed. The results show that the Baiyangdian Lake water is eutrophicated. Of the 30 sampling sites, 8 are "mildly eutrophicated" (accounting for 26.7%), 16 are "moderately eutrophicated" (accounting for 53.3%), and 6 are "severely eutrophicated" (accounting for 20%). Compared with the periods between 1991 and 2017, the water quality of most sampling sites, especially in the northern parts, has improved a lot. This shows that the pollution control measures have basically curbed the gradually increasing trend of pollution in the waterbody. The nutritive pollution in sediment is severe. The concentrations of TN are between 1 483.7 and 14 234.1 mg•kg^-1, with a mean value of 5 054.9 mg•kg^-1, and the concentration coefficient variation in different sites is as high as 46.5%. The concentrations of TP are between 360.3 and 1 964.4 mg•kg^-1, with a mean value of 925.4 mg•kg^-1, and the concentration coefficient variation in different sites is 25.7%. Geoaccumulation index calculation shows that the mean Igeo value of heavy metals in sediments is less than 1, which indicates cleanness or slight pollution. The main contributions to heavy metal pollution are Cd, Zn, and Cu. Regarding ecological risk of heavy metals, only some sites (i.e., L3, L21, L28, and L29) are at high and very high risk level, while the remaining sites are at moderate risk level. Overall, the pollution of Baiyangdian Lake changes from the northern part to the southern part, and the main influencing factors also change from external pollution to endogenous pollution caused by the discharge of villages in the lake and the sediments.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Lake pollution Controlled terms:Chemical oxygen demand - Eutrophication - Heavy metals - Lakes - Sediments - Water pollution control - Water quality Uncontrolled terms:Baiyangdian lakes - Concentration coefficients - Geo-accumulation index - Heavy metal pollution - Sediment pollution - Spatio-temporal variation - Water eutrophication - Water quality indexes Classification code:445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography Numerical data indexing:Percentage 2.00e+01%, Percentage 2.57e+01%, Percentage 2.67e+01%, Percentage 4.65e+01%, Percentage 5.33e+01% DOI:10.13227/j.hjkx.201909263 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796274 Title:Characteristics of Cd, As, and Pb in Soil and Wheat Grains and Health Risk Assessment of Grain-Cd/As/Pb on the Field Scale Title of translation:基于田块尺度的农田土壤和小麦籽粒镉砷铅污染特征及健康风险评价 Authors:Xiao, Bing (1); Xue, Pei-Ying (1); Wei, Liang (1); Liu, Cheng-Cheng (2); Gao, Pei-Pei (1); Fan, Li-Min (1); Du, Jia-Yan (1); Liu, Wen-Ju (1) Author affiliation:(1) Key Laboratory of Ecological Environment of Farmland in Hebei, College of Resources and Environmental Sciences, Hebei Agricultural University, Baoding; 071000, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Liu, Wen-Ju(liuwj@hebau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2869-2877 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, heavy metal pollution in farmlands has become increasingly serious because of human activities such as metal smelting, sewage irrigation, and road traffic in China. A field survey was conducted to investigate characteristics of Cd, As, and Pb in soil and wheat grains and assess the health risk of grain-Cd/As/Pb to humans on the fields scale. The farmland was influenced by smelter and sewage irrigation in the attitude and by road traffic in the horizon. The results showed that in farmland soil with moderate pollution levels, Cd, As, and Pb concentrations in soil samples all exceeded the risk screening values of farmland soil (GB 15618-2018), and the exceeding rates were 100%, 100%, and 36.7% respectively; the exceeding rates of Cd and Pb concentrations in wheat grains were 76.7% and 13.3%, respectively (GB 2762-2017). Distance from smelter, river of sewage irrigation, and road had no significant effect on Cd, As, and Pb concentrations in soil but had a significant effect on Cd and As concentrations in wheat grains, with the median Cd and As concentrations of the closest group being 14.9% and 41.8%, respectively, higher than the highest group (P<0.05). The Pb concentrations in soil and wheat grains were influenced by road traffic; the median Pb concentrations of the closest group were 78.9% and 471%, respectively, higher than the highest group (P<0.05). Cd and As in wheat grains have carcinogenic risks (Ri>1×10^-4), RCd>RAs, Rchildren>Radult, while Pb poses no health risks in this farmland.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Soil pollution Controlled terms:Farms - Fertilizers - Grain (agricultural product) - Health - Health risks - Heavy metals - Irrigation - Risk assessment - River pollution - Roads and streets - Screening - Sewage - Smelting - Soils Uncontrolled terms:Carcinogenic risk - Farmland soils - Heavy metal pollution - Human activities - Pb concentration - Pollution level - Risk screening - Sewage irrigation Classification code:406.2 Roads and Streets - 452.1 Sewage - 453 Water Pollution - 461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 533.2 Metal Refining - 802.3 Chemical Operations - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.00e+02%, Percentage 1.33e+01%, Percentage 1.49e+01%, Percentage 3.67e+01%, Percentage 4.18e+01%, Percentage 4.71e+02%, Percentage 7.67e+01%, Percentage 7.89e+01% DOI:10.13227/j.hjkx.201911130 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796279 Title:Effect of HRT on Denitrifying Phosphorus and Nitrogen Removal in Modified A²/O-BAF Title of translation:HRT对改良式A²/O-BAF反硝化除磷脱氮的影响 Authors:Zhao, Kai-Liang (1, 2); Liu, An-Di (1, 2); Nan, Yan-Bin (1, 2); Liang, Li-Min (1, 2); Wang, Yun-Xia (1, 2); Chen, Yong-Zhi (1, 2) Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) Technical Center of Sewage Treatment Industry in Gansu, Lanzhou; 730070, China Corresponding author:Chen, Yong-Zhi(476411589@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2771-2778 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effect of hydraulic retention time (HRT) on denitrifying phosphorus and nitrogen removal in a modified two sludge A²/O-BAF system was studied. The influent COD, NH4⁺-N, and TP were 189.6, 60.4, and 5.1 mg•L^-1, respectively. When HRT was 9, 8, 7, and 6 h, the average effluent COD was less than 42 mg•L^-1. The average effluent NH4⁺-N levels were 2.4, 2.8, 3.3, and 6.5 mg•L^-1, respectively. The average effluent TP values were 0.3, 0.4, 0.7, and 0.8 mg•L^-1, respectively. The ratio of the denitrifying phosphorus accumulation organisms (DPAOs/PAOs) in the system of anoxic zone was reduced from 76.8% to 48.8%. When HRT was 8 h, the ratio of denitrifying phosphorus to nitrogen (ΔPO4^3-/ΔNO3^--N) was increased by 37.5% by a mathematical statistics method. The ΔPO4^3-/ΔNO3^--N in the anoxic zone was 1.24 (the theoretical value is 1.41). At this time, the effect of denitrifying phosphorus to nitrogen was the best. The SVI value was lower than 100 mL•g^-1 throughout the experiment, and the MLVSS/MLSS gradually decreased from 0.74 to 0.63, indicating that the sludge activity was reduced.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Nitrogen removal Controlled terms:Denitrification - Phosphorus - Statistics Uncontrolled terms:Denitrifying phosphorus accumulation organisms - Hydraulic retention time - Mathematical statistics methods - Modified a - Phosphorus and nitrogen removal - Sludge activity - Theoretical values Classification code:802.2 Chemical Reactions - 804 Chemical Products Generally - 922.2 Mathematical Statistics Numerical data indexing:Mass_Density 4.20e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.10e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 6.50e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 8.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 3.75e+01%, Percentage 7.68e+01% to 4.88e+01%, Specific_Volume 1.00e-01m3/kg to 2.20e-02m3/kg, Time 2.16e+04s, Time 2.88e+04s DOI:10.13227/j.hjkx.201907167 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861788 Title:Effects of the Immobilization of Cadmium in Soil Alone or Combined with Foliar Application of Selenium on Cadmium Accumulation in the Plants of Different Genotypes of Tsai-tai Title of translation:钝化与叶面阻控对不同基因型红菜苔镉累积的影响 Authors:Cao, Kun-Kun (1); Li, Cheng-Cheng (1); Hu, Xue-Yu (1); Guo, Xiao (1); Huang, Yang (1) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430078, China Corresponding author:Hu, Xue-Yu(huxueyu@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3434-3440 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the safe utilization of technology in mildly and moderately cadmium (Cd)-contaminated farmland and realize the safe production of agricultural products, two different cadmium-accumulating genotypes of Tsai-tai were used as test crops, using the pot experiment method. The same six treatments were set on the soil where the two test crops were planted: control (CK), addition of 3% (mass fraction) biochar (BC), addition of 0.17% calcium magnesium phosphate fertilizers (CMP), foliar application of 3 mg•L^-1 Na2SeO3 aqueous solution (Se), BC+Se, and CMP+Se, to study the changes in available cadmium in soil under different treatments and the characteristics of cadmium accumulation in different parts of the plant. The results showed that: ① Under the same treatment, the content of available cadmium in soil near the root of the low-cadmium-accumulating genotype of Tsai-tai of Jinqiuhong Ⅲ was significantly lower than that of the high-cadmium-accumulating genotype of Shiyuehong. BC and CMP had a significant passivating effect on cadmium in the soil near the root of Jinqiuhong Ⅲ, and the passivating effect of BC was better than that of CMP; the effect of passivating treatment was significantly better than that of foliar application of selenium. ② The root system of Tsai-tai of Jinqiuhong Ⅲ had a stronger ability to accumulate cadmium than that of Shiyuehong, and the accumulated cadmium tended to be stored in the root. There were no synergistic effects between the foliar application of selenium and the two kinds of passivants on inhibiting the transfer and enrichment of cadmium to the edible parts of Tsai-tai. ③ Under the treatments of BC and CMP, the content of cadmium in the edible part of Tsai-tai of Jinqiuhong Ⅲ was lower than the limit value of cadmium in GB 2762-2017 (0.10 mg•kg^-1). This study shows that for mildly and moderately cadmium-contaminated farmland, applying green passivants such as biochar, calcium magnesium phosphate fertilizers, and planting crops with weak absorption and low accumulation can achieve the safe use of the cadmium-contaminated farmland and safe production of agricultural products.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Chemicals removal (water treatment) Controlled terms:Agricultural products - Agricultural robots - Cadmium - Calcium phosphate - Crops - Farms - Magnesium compounds - Phosphate fertilizers - Phosphates - Selenium - Selenium compounds - Sodium compounds - Soils Uncontrolled terms:Cadmiums (Cd) - Different treatments - Foliar application - Mass fraction - Pot experiment - Safe production - Synergistic effect - Weak absorption Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 1.70e-01%, Percentage 3.00e+00% DOI:10.13227/j.hjkx.202001098 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990472 Title:Distribution Characteristics of Antibiotic Resistance Genes and Mobile Genetic Elements in Beijing Vegetable Base Soils Title of translation:北京蔬菜地土壤中抗生素抗性基因与可移动元件的分布特征 Authors:Zhang, Ru-Feng (1, 2); Song, Yuan (1); Gao, Hao-Ze (2); Cheng, Shou-Tao (2); Sun, Yan-Mei (2); Wang, Xu-Ming (2) Author affiliation:(1) College of Biological Sciences, China Agricultural University, Beijing; 100193, China; (2) Beijing Agricultural Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing; 100097, China Corresponding author:Sun, Yan-Mei(sunyanmei2001@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:385-393 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The distribution characteristics of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) in five vegetable base soils from Beijing, China, were assessed. The composition of ARGs and MGEs in soil samples were analyzed by HT-qPCR. We detected 92-121 ARGs and 4-6 MGEs. The ARGs and MGEs in vegetable base soils from different districts were separated from each other. The dominant ARGs shared by vegetable bases were oprD, acrA-04, and acrA-05 of a multidrug, mphA-01 of MLSB, and β-Lactamase fox5, vanC-03 of vancomycin. The shared MGE among the five vegetable base soils was intI1. A total of seven antibiotics were detected in the soil of several vegetable bases. The dominant antibiotics included enoxacin (ENR), norfloxacin (NOR), oxytetracycline (OTC), and sulfamethoxazole (SMX). The numbers and abundance of antibiotics in the soil of vegetable bases from the Shunyi district were the highest, followed by those from Tongzhou and Changping. Correlation analysis showed that there was a significant positive correlation between the abundance of ARGs and the abundance of antibiotics in the soil of vegetable bases (P<0.05). These results provide basic theoretical data for controlling the transmission of ARGs.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Vegetables Controlled terms:Antibiotics - DNA - Genes - Polymerase chain reaction - Soils Uncontrolled terms:Antibiotic resistance genes - Correlation analysis - Distribution characteristics - Genetic elements - Oxytetracyclines (OTC) - Positive correlations - Shunyi District - Sulfamethoxazole (SMX) Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 821.4 Agricultural Products DOI:10.13227/j.hjkx.201907086 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990461 Title:Nitrogen Removal from Mature Landfill Leachate via Denitrification-Partial Nitritation-ANAMMOX Based on a Zeolite Biological Aerated Filter Title of translation:反硝化-高效部分亚硝化-厌氧氨氧化工艺处理老龄垃圾渗滤液 Authors:Chen, Xiao-Zhen (1, 2); Wang, Xiao-Jun (1, 2); Chayangkun, Karasuta (1, 2); Zhou, Song-Wei (1, 2); Zhong, Zhong (1, 2); Chen, Zhen-Guo (3, 4); Chen, Xiao-Kun (1, 2) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Cluster, Ministry of Education, Guangzhou; 510006, China; (3) School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou; 510665, China; (4) Hua An Biotech Co., Ltd., Foshan; 528300, China Corresponding author:Wang, Xiao-Jun(cexjwang@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:345-352 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A combined process of denitrification-partial nitritation-ANAMMOX based on a zeolite biological aerated filter (ZBAF) was applied to treat mature landfill leachate. We investigate the partial nitritation characteristics of the ZBAF and the nitrogen removal performance as well as the carbon removal performance of the combined process. Results showed that, based on the selective inhibition of nitrite oxidizing bacteria (NOB) by free ammonia (FA), the ZBAF could successfully achieve stable and efficient partial nitrification of mature landfill leachate, with an average nitrite accumulation rate (NAR) of 93.8% and a maximum nitrite production rate (NPR) of 1.659 kg•(m³•d)^-1. After adding 700 mg•L^-1 glucose to the influent, due to the synergistic effect of denitrification and anammoxidation, the combined process achieved its best nitrogen removal performance at a reflux ratio of 2.0 and hydraulic retention time (HRT) of 2.2 days. The average ammonia removal efficiency (ARE), total nitrogen removal efficiency (NRE), total nitrogen removal loading rate (NRR), and average chemical oxygen demand (COD) removal efficiency were 97.2%, 90.0%, 0.585 kg•(m³•d)^-1, and 45.3%, respectively. Furthermore, the NRR of the anaerobic ammonium oxidation (ANAMMOX) process (NRRANA) reached 1.268 kg•(m³•d)^-1. High-throughput sequencing technology was used to analyze the microbial community structure in each device. Results showed that denitrifiers (Paracoccus and Comamonas), ammonia-oxidizing bacteria (AOB) (Nitrosomonas), and ANAMMOX bacteria (Candidatus Kuenenia and Candidatus Anammoxoglobus) were the dominant bacteria in the UASB, ZBAF, and ANAMMOX reactor, respectively, which corresponded to the stable nitrogen removal performance of the combined process.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Nitrogen removal Controlled terms:Ammonia - Bacteria - Biofilters - Chemical oxygen demand - Denitrification - Efficiency - Leachate treatment - Nitration - Wastewater treatment - Zeolites Uncontrolled terms:Ammonia oxidizing bacteria - Anaerobic ammonium oxidation - Biological aerated filter - Chemical oxygen demand removals - High-throughput sequencing - Hydraulic retention time - Microbial community structures - Nitrite-oxidizing bacteria Classification code:452.4 Industrial Wastes Treatment and Disposal - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Age 6.03e-03yr, Mass_Density 7.00e-01kg/m3 to 2.20e-02kg/m3, Percentage 4.53e+01%, Percentage 9.00e+01%, Percentage 9.38e+01%, Percentage 9.72e+01% DOI:10.13227/j.hjkx.201906165 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990458 Title:Effect of Ozonation on Microorganism in the Biological Activated Carbon and Disinfection By-Products in the Effluent Title of translation:臭氧对生物活性炭中微生物及出水消毒副产物的影响 Authors:Liu, Bao-Ming (1); Wang, Xi-Xi (1); Zhang, Xiao-Xia (1); Gu, Yan-Fang (1); Li, Yu-Ping (1); Ruan, Wen-Quan (1, 2, 3); Miao, Heng-Feng (1, 3, 4); Pan, Yang (4) Author affiliation:(1) School of Environmental and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi; 214122, China; (3) Jiangsu Engineering Laboratory of Biomass Energy and Carbon Reduction Technology, Wuxi; 214122, China; (4) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China Corresponding author:Miao, Heng-Feng(hfmiao@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:253-261 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study was carried out in the ozone (O3) and biological activated carbon (BAC) section of a drinking water plant to investigate the effects of O3 on microbial and effluent disinfection by-products (DBPs) in BAC during drinking water treatment. The water quality, dissolved organic matter (DOM) characteristics, microbial activity, and DBPs formation at different O3 concentrations were analyzed. Results showed that the effect of O3 on microorganisms is mainly that it increased the utilization efficiency of DOM. However, excessive O3 increased the amount of organic matter such as protein and microbial metabolites (SMPs) in the effluent. When the O3 concentration increased from 0 mg•L^-1 to 2.0 mg•L^-1, the survival rate of microorganisms in the BAC decreased from 95.10% to 62.60%. However, since O3 transforms organic matter into a biodegradable substance, we found that microbial activity increased by 62.52% and that the biofiltration of the BAC was enhanced. When the O3 concentration was further increased to 4.0 mg•L^-1, the microbial survival rate decreased to 49.9% and the protein and SMPs produced by the microorganisms increased. This resulted in an increased formation of carbon-containing DBPs (C-DBPs) and nitrogen-containing DBPs (N-DBPs) by 41.93% and 7.18%, respectively. In summary, an appropriate dosage of O3 was beneficial for removing DOM by O3-BAC, but we found that an excessive O3 concentration caused the formation of new DBPs precursors.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Ozone water treatment Controlled terms:Activated carbon - Activated carbon treatment - Biogeochemistry - Disinfection - Effluent treatment - Effluents - Metabolites - Microorganisms - Organic compounds - Ozone - Ozonization - Potable water - Proteins - Water quality Uncontrolled terms:Biological activated carbon - Disinfection by-product - Disinfection byproducts - Dissolved organic matters - Drinking water plants - Microbial activities - Microbial metabolites - Utilization efficiency Classification code:444 Water Resources - 445.2 Water Analysis - 452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 481.2 Geochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 2.00e-03kg/m3, Mass_Density 4.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 4.19e+01%, Percentage 4.99e+01%, Percentage 6.25e+01%, Percentage 7.18e+00%, Percentage 9.51e+01% to 6.26e+01% DOI:10.13227/j.hjkx.201907102 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990486 Title:Stable Isotope Characteristics and Vapor Source of Precipitation in the South and North Slopes of Wushaoling Mountain Title of translation:乌鞘岭南, 北坡降水稳定同位素特征及水汽来源对比 Authors:Xu, Xiu-Ting (1); Jia, Wen-Xiong (1); Zhu, Guo-Feng (1, 2); Ma, Xing-Gang (1); Zhang, Yu (1); Yuan, Rui-Feng (1); Zhang, Zhi-Yuan (1); Shi, Yang (1) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China; (2) State Key Laboratory of Cryosphere Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China Corresponding author:Jia, Wen-Xiong(wxjiaxy@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:155-165 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We analyze the stable isotope characteristics and vapor source of precipitation in a monsoon marginal area in the southern and northern slopes of Wushaoling Mountain, northwestern China, using 97 precipitation samples collected from October 2016 to October 2017. Correlation analysis and HYSPLIT model are used to study the characteristics of stable isotopes in precipitation, local meteoric water line equation, temperature and precipitation effects, and vapor source. The study found the following results. ① The slope and intercept of the southern slope local meteoric water line were lower than of those of the northern slope and global averages. ② Although the isotope temperature effects and seasonal effects of both slopes were obvious, the temperature effect of the northern slope was more obvious than of that of the southern slope. ③ The stable isotopes of precipitation during the summer on the northern slope and the precipitation on the southern slope<5 mm revealed that the precipitation effect was weak. There was no obvious precipitation effect in other seasons or in other precipitation levels on both slopes. ④ Vapor from the northwest and north accounted for>90% of the total. The northern slope was rarely affected by monsoon vapor, but the southern slope was affected by the southeast monsoon during the summer. Local water vapor recycling contributed to water vapor in the southern and northern slopes of Wushaoling Mountain. This study could improve the cognition of precipitation isotopic evolution in alpine regions, and lays a foundation for further research on isotope hydrology in cold and arid regions.
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Isotopes Controlled terms:Atmospheric thermodynamics - Landforms - Temperature - Water piping systems - Water recycling - Water vapor Uncontrolled terms:Correlation analysis - Meteoric water lines - Northwestern China - Precipitation effects - Precipitation level - Precipitation samples - Seasonal effects - Southeast monsoon Classification code:446.1 Water Supply Systems - 481.1 Geology - 641.1 Thermodynamics DOI:10.13227/j.hjkx.201904201 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278082 Title:Effect of Filter Speed and Water Quality on Ammonia Removal in Groundwater Containing Iron, Manganese, and Ammonia at Low Temperature Title of translation:滤速与水质对低温含铁锰氨地下水中氨去除的影响 Authors:Zhang, Jie (1, 2); Mei, Ning (1); Liu, Meng-Hao (1); Ye, Xue-Song (2); Li, Dong (1) 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:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1236-1245 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In a groundwater plant we carried out a process operation test of biological removal of iron and manganese nitrification coupled with completely autotrophic ammonium removal over nitrite (CANON) (Fe(Ⅱ) 2.91-6.35 mg•L^-1, Mn(Ⅱ) 0.47-0.98 mg•L^-1, NH4⁺-N 1.15-2.26 mg•L^-1) at low temperature (6-8℃), to explore the effects of filter speed and water quality on ammonia nitrogen removal. The results showed that the mature low-temperature biological filter column, which had been out of service for one month, was cultured for 40 days at a filtration rate of 2 m•h^-1 and successfully started. In this process, when the water inlet concentration remained the same, the improved filter speed would reduce the efficiency of ammonia nitrogen capture by the filter column, increase the concentration of ammonia nitrogen in the depth of the filter layer, and improve the efficiency of ammonia nitrogen ions capture by anaerobic ammonia oxidation bacteria (AnAOB) in the depth of the filter layer, so that the ammonia nitrogen removed by CANON in the water increased, while the ammonia nitrogen removed by nitrification decreased. When the filter speed remained unchanged, the concentration of ammonia nitrogen in water was increased to make the ammonia nitrogen with higher concentration enter the filter layer, which increased the concentration of ammonia nitrogen in the zone where ammonia nitrogen and nitrous nitrogen coexist, and improved the net catching efficiency of AnAOB on ammonia nitrogen ions in the filter layer, thus resulting in an increase in ammonia nitrogen removed by CANON.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Iron removal (water treatment) Controlled terms:Ammonia - Concentration (process) - Efficiency - Groundwater - Iron - Manganese removal (water treatment) - Nitrification - Nitrogen removal - Passive filters - Speed - Temperature - Water quality Uncontrolled terms:Ammonia nitrogen removal - Ammonia oxidation - Ammonium removal - Biological filters - Biological removal - Filtration rates - Low temperatures - Process operation Classification code:444.2 Groundwater - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 545.1 Iron - 641.1 Thermodynamics - 703.2 Electric Filters - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Age 1.10e-01yr, Mass_Density 1.15e-03kg/m3 to 2.26e-03kg/m3, Mass_Density 2.91e-03kg/m3 to 6.35e-03kg/m3, Mass_Density 4.70e-04kg/m3 to 9.80e-04kg/m3 DOI:10.13227/j.hjkx.201909268 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278051 Title:Analysis of Chemical Components and Sources of PM2.5 During Autumn and Winter in Yangquan City Title of translation:阳泉市秋冬季PM2.5化学组分及来源分析 Authors:Wang, Cheng (1, 2); Yan, Yu-Long (1); Xie, Kai (1); Li, Ru-Mei (1, 2); Xu, Yang (1, 2); Peng, Lin (1) Author affiliation:(1) Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing; 102206, China; (2) School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing; 102206, China Corresponding author:Yan, Yu-Long(yanyulong@yeah.net) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1036-1044 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:PM2.5 samples were collected from October 15, 2017 to January 23, 2018 in the Yangquan urban area. The characteristics of PM2.5 and its main chemical components on clean and polluted days were analyzed, and source apportionment of PM2.5 was conducted using enrichment factor analysis (EF) and positive matrix factorization (PMF). The results showed that the ratios of secondary inorganic ions (SO4^2-, NO3^-, and NH4⁺) to PM2.5 on polluted days was 23.83%, which is 2.43 times higher than that on clean days, indicating that secondary inorganic pollution was more significant on polluted days. The enrichment degree of anthropogenic elements Cd, Sb, Sn, Cu, Pb, Zn, and As on polluted days was higher than that on clean days. The results of the PMF source apportionment showed that the main sources of PM2.5 in Yangquan are coal combustion, dust, motor vehicles, secondary aerosols, and industry, with contributions of 29.26%, 23.83%, 19.34%, 16.01%, and 11.57%, respectively. The contribution of motor vehicle emissions to PM2.5 on polluted days is 20.57%, which is higher than that on clean days (17.82%), while the contribution of coal combustion sources to PM2.5 on polluted days is 23.04%, which is significantly lower than that on clean days (33.75%). The stationary weather on polluted days caused the contribution of motor vehicle emissions to PM2.5 to increase compared with on clean days, while the contribution of coal combustion sources to PM2.5was decreased. The results show that air pollution control should pay more attention to the control of coal combustion and dust during autumn and winter in Yangquan, and further strengthen the control of motor vehicles to reduce their contribution to pollution.
© 2020, Science Press. All right reserved. Number of references:58 Main heading:Coal combustion Controlled terms:Air pollution - Air pollution control - Chemical analysis - Coal - Coal dust - Coal industry - Factorization - Vehicles Uncontrolled terms:Anthropogenic elements - Dust pollution - Enrichment factors - Motor vehicle emissions - PM2.5 - Positive Matrix Factorization - Source apportionment - Yangquan City Classification code:451 Air Pollution - 451.2 Air Pollution Control - 524 Solid Fuels - 921 Mathematics Numerical data indexing:Percentage 1.16e+01%, Percentage 1.60e+01%, Percentage 1.78e+01%, Percentage 1.93e+01%, Percentage 2.06e+01%, Percentage 2.30e+01%, Percentage 2.38e+01%, Percentage 2.93e+01%, Percentage 3.38e+01% DOI:10.13227/j.hjkx.201906024 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371184 Title:Characteristics of Chemical Fractions of Dissolved Organic Matter in Road Runoff in Beijing Title of translation:北京市道路雨水径流溶解性有机物化学组分特性 Authors:Chen, Meng-Yao (1); Du, Xiao-Li (1, 2); Yu, Zhen-Ya (1); Zhu, Ying-Jie (1); Liang, Hui (1); Wu, Fan (1) Author affiliation:(1) Key Laboratory of Urban Stormwater System and Water Environment, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China; (2) Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China Corresponding author:Du, Xiao-Li(duxiaoli@bucea.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1709-1715 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The characteristics of DOM chemical fractions in road runoff with different traffic density were analyzed using excitation emission matrix spectroscopy (EEMs) technology, UV-vis spectra, and FTIR spectroscopy. The results showed that hydrophobic organics were the dominant components in DOM of road runoff, and hydrophobic neutral organics was the most abundant fraction. The hydrophilic organics in DOM of road runoff were mainly composed of protein-like substances. Both protein-like substances and fulvic-like acid substances were found in the hydrophobic organic matters. A high degree of aromatization and a low degree of humification were detected in hydrophobic organics, whereas the characteristics of hydrophilic organics were opposite. Some functional groups such as isomerized carboxyl and unsaturated C〖FY=,1〗C bonds were featured in acidic organics, and ether and ester groups, phenol, and alcohol were detected in alkaline and neutral organics. The substance composition and characteristics of DOM chemical fractions in road runoff were not affected by the traffic density. Traffic density influenced the quantity of substances in each chemical fraction only. With traffic density increasing, the matter content and the aromatization degree of DOM chemical fractions in road runoff increased, whereas the degree of humification decreased.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Roads and streets Controlled terms:Alkalinity - Biodegradation - Biogeochemistry - Chemical analysis - Fourier transform infrared spectroscopy - Hydrophilicity - Hydrophobicity - Organic compounds - Proteins - Runoff Uncontrolled terms:Chemical fractions - Dissolved organic matters - Excitation emission matrices - FTIR spectroscopy - Hydrophobic neutral - Hydrophobic organics - Road runoff - Traffic densities Classification code:406.2 Roads and Streets - 442.1 Flood Control - 801 Chemistry - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids DOI:10.13227/j.hjkx.201908158 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371265 Title:Response of Soil Enzyme Activity and Chemical Properties to Nitrogen Addition in a Korean Pine Plantation Title of translation:红松人工林土壤酶活性与化学性质对氮添加的响应 Authors:Lü, Lai-Xin (1); Song, Lei (1); Liu, Zhi-Li (1, 2); Zhang, Jin-Bo (3); Jin, Guang-Ze (1, 2) Author affiliation:(1) Center for Ecological Research, Northeast Forestry University, Harbin; 150040, China; (2) Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin; 150040, China; (3) School of Geography Sciences, Nanjing Normal University, Nanjing; 210023, China Corresponding author:Jin, Guang-Ze(taxus@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1960-1967 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil enzymes participate in numerous complex biochemical processes that take place in the soil and play an important role in the material circulation of terrestrial ecosystems. To explore the response of soil enzyme activities and chemical properties to nitrogen deposition in temperate forests, this study analyzed four soil enzyme activities based on the nitrogen addition experiment plot of Korean pine (Pinus koraiensis) plantation, which was located in the Liangshui National Natural Reserve, Heilongjiang Province. The results showed that the activities of N-acetyl-glucosidase (NAG) and alkaline phosphatase (AKP) increased significantly with increasing nitrogen application concentration. The activity of beta-glucosidase (BG) and acid phosphatase (ACP) was not significantly different among different nitrogen application treatments. The contents of total carbon, total nitrogen, total phosphorus, and available nitrogen and four enzyme activity in the upper soil (0-10 cm) under the same nitrogen application level were significantly higher than those in the lower soil (10-20 cm), but the pH values were not significantly different. Total carbon has an extremely significant positive correlation with NAG, BG, AKP, and ACP. Total nitrogen has an obvious or extremely significant positive correlation with BG, NAG, and AKP as well as ACP. The available nitrogen has an obvious and highly significant positive correlation with NAG and AKP. The total phosphorus has an obvious and extremely significant positive correlation with ACP and AKP, respectively. The nitrogen application level and the soil layer had different effects on soil enzyme activity and soil chemical properties. Long-term large input of nitrogen can directly or indirectly change soil chemical properties and affect soil enzyme activity.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Soils Controlled terms:Alkalinity - Carbon - Chemical analysis - Enzyme activity - Forestry - Nitrogen - Phosphatases - Phosphorus Uncontrolled terms:Application level - Hydrolase - Nitrogen deposition - Soil chemical property - Temperate forests Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 804 Chemical Products Generally Numerical data indexing:Size 0.00e+00m to 1.00e-01m, Size 1.00e-01m to 2.00e-01m DOI:10.13227/j.hjkx.201906168 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278062 Title:Evolution of the Distribution of PM2.5 Concentration in the Yangtze River Economic Belt and Its Influencing Factors Title of translation:长江经济带PM2.5分布格局演变及其影响因素 Authors:Huang, Xiao-Gang (1, 2, 3); Zhao, Jing-Bo (2, 3); Cao, Jun-Ji (2); 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:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1013-1024 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Intensive social and economic activity has led to serious pollution in the Yangtze River economic belt since 2000. It is urgent to study the evolution of the distribution of PM2.5 concentration and its influencing factors in this area, to adopt new ways of development into practice and promote comprehensive regional air pollution prevention and control. Based on PM2.5 concentration estimated by remote sensing retrieval, this paper studied the evolution of the distribution of PM2.5 concentration in the Yangtze River economic belt from 2000 to 2016, and analyzed spatial non-stationarity of the influence of natural and socio-economic factors on this evolution via a geographically weighted regression model. The results showed that: ①The general law of PM2.5 concentration presented as higher in the east and lower in the west, with a significant trait of the pollution agglomerations corresponding to urban agglomerations. ②Taking the year 2007 as a divide, annual concentration of PM2.5 went through a pattern of annually increasing from 2000 to 2007. and then wavelike decreasing from 2007 to 2016. The annual average concentration increased to 44.1 μg•m^-3 in 2007 from the record of 27.2 μg•m^-3 in 2000, and then decreased to 33.6 μg•m^-3 in 2016. In terms of regions polluted, before 2007, it covered areas including the Yangtze River Delta urban agglomerations, the Yangtze River Middle Reaches urban agglomerations, and the Chengdu-Chongqing urban agglomerations, before quickly stretching to their neighboring areas; after 2007, the extent of areas covered shrank. ③Based on spatial auto-correlation analysis, PM2.5 concentration had a significant spatial auto-correlation with hot spots spread over Shanghai, Jiangsu, north-central Anhui, northern Zhejiang, and the central part of Hubei, while cool spots were located in Yunnan, the western and southern parts of Sichuan, and the western part of Guizhou. ④There is a space-time discrepancy by socio-economic and natural factors in the distribution of PM2.5 concentration. The socio-economic factors mainly have a positive influence on the concentration, whereas precipitation, one of the natural factors, has a negative influence. The remaining natural factors not only varied in their degree of influence, but also triggered the influence either in a positive or negative manner from time to time and space to space.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:River pollution Controlled terms:Agglomeration - Air pollution control - Regression analysis - Remote sensing - Rivers - Spatial variables measurement Uncontrolled terms:Distribution - Evolution - Geographically weighted regression - Influencing factors - PM2.5 concentration - Yangtze River Classification code:451.2 Air Pollution Control - 453 Water Pollution - 802.3 Chemical Operations - 922.2 Mathematical Statistics - 943.2 Mechanical Variables Measurements DOI:10.13227/j.hjkx.201906158 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008889 Title:Situation Analysis and Trend Prediction of the Prevention and Control Technologies for Planting Non-Point Source Pollution Title of translation:种植业面源污染防控技术发展历程分析及趋势预测 Authors:Yu, Ying-Liang (1); Yang, Lin-Zhang (1); Li, Hong-Na (2); Zhu, Chang-Xiong (2); Yang, Bei (1); Xue, Li-Hong (1) Author affiliation:(1) Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing; 210014, China; (2) Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing; 100081, China Corresponding author:Yang, Lin-Zhang(lzyang@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3870-3878 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The contribution of crop planting to agricultural non-point source pollution should not be underestimated in China. Although many modern technologies have been developed to prevent non-point source pollution in recent decades, their impacts on pollution control in farmland are far from expectation. The application of technologies for non-point source pollution control for crop farming has been delayed due to unclear technical parameters and application effectiveness. Therefore, based on studies of the non-point source pollution control for crop farming in China and abroad that were published in the last 20 years, the present research was carried out to determine the development process of planting non-point source pollution control technologies and to illuminate the framework construction. The technologies in different fields and directions were compared by their effects on fertilizer input, yield, and pollutant emission. The development trend in the field of prevention and control technologies for planting non-point source pollution was subsequently predicted. In addition, a technical framework was developed with 3 fields (pollutant source reduction, pollutant interception in the migration process, and nutrient recycling) and 14 directions. The analysis showed that the technologies for reducing pollutants from the source have attracted the most (and increasing) concern with many research directions, and that many of the studies in this field have focused on the regulation of fertilizer application. On the contrary, there is a lack of technologies in the fields of pollutant process interception and nutrient recycling. Promoting nutrient-use efficiency, regulating nutrient transformation, and using soil supplements will be the main entry points for non-point source pollution control for crop farming. Furthermore, technologies will operate better with the help of farmland infrastructure and downstream purification systems.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Soil pollution control Controlled terms:Agricultural robots - Crops - Farms - Fertilizers - Forestry - Nutrients - Recycling Uncontrolled terms:Agricultural non-point source pollutions - Downstream purifications - Fertilizer applications - Non-point source pollution - Nutrient transformations - Nutrient-use efficiencies - Prevention and controls - Technical frameworks Classification code:452.3 Industrial Wastes - 454.2 Environmental Impact and Protection - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products Numerical data indexing:Age 2.00e+01yr DOI:10.13227/j.hjkx.201911028 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008906 Title:Competitive Selection of Hydroxylamine on Ammonia Oxidizing Bacteria and Nitrite Oxidizing Bacteria Title of translation:羟胺对氨氧化菌和亚硝酸盐氧化菌的竞争性选择 Authors:Qiao, Xin (1); Wang, Bo (1); Guo, Yuan-Yuan (2); Peng, Yong-Zhen (1) Author affiliation:(1) National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China; (2) Xinkai Water Environmental Investment Co., Ltd., Beijing; 101101, China Corresponding author:Peng, Yong-Zhen(pyz@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3765-3772 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effective inhibition of nitrite oxidizing bacteria (NOB) is the key to realizing satisfactory nitrite accumulation and achieving effective nitritation. In order to explore the selective effect of hydroxylamine (NH2OH) on ammonia oxidizing bacteria (AOB) and NOB, a sequencing batch reactor (SBR) with the operation mode of anaerobic/aerobic/anoxia (A/O/A) was used to observe the start-up of nitritation at different concentrations and frequencies of NH2OH. The results showed that when 5 mg•L^-1 of NH2OH was added once every 2 cycles, the nitrite accumulation rate (NAR) increased from 0.1% to 57.4% in 6 days, and was maintained at (62.0±4.6)% until the end of the trials. In the typical cycle on day 6, the NN4⁺-N dropped from 26.05 mg•L^-1 to 8.06 mg•L^-1, thus producing 9.02 mg•L^-1 of NO2^--N and 6.70 mg•L^-1 of NO3^--N. Meanwhile, the ratio of the maximum activity of AOB (rAOB) to NOB (rNOB) increased from 1.05 on day 1 to 4.22 on day 9. Moreover, qPCR results indicated that the abundance of AOB and NOB decreased to 30.2% and 19.1%, respectively, on day 9 in comparison to the original sample. The results indicate that the selective effect of AOB and NOB based on NH2OH is expected to provide a feasible application for the rapid start-up nitritation of municipal wastewater.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Bacteria Controlled terms:Amines - Ammonia - Batch reactors - Nitration - Polymerase chain reaction Uncontrolled terms:Ammonia oxidizing bacteria - Municipal wastewaters - Nitrite accumulation - Nitrite-oxidizing bacteria - Operation mode - Original sample - Selective effects - Sequencing batch reactors Classification code:801.2 Biochemistry - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Age 1.64e-02yr, Mass_Density 2.61e-02kg/m3 to 8.06e-03kg/m3, Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 6.70e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 9.02e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.00e-01% to 5.74e+01%, Percentage 1.91e+01%, Percentage 3.02e+01% DOI:10.13227/j.hjkx.201911190 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990480 Title:Characteristics of Nitrogen Metabolism by Denitrifying Bacterial Agents in Low Dissolved Oxygen Black Odor Water Title of translation:脱氮菌剂在低溶解氧黑臭水体中氮代谢特征 Authors:Zhao, Zhi-Rui (1, 2, 3, 4); Liu, Shuo (1); Li, Duo (1); Li, Hai-Ping (5); Li, Fang-Hong (1); Zhang, Jia-Yao (2); Bai, Zhi-Hui (2) Author affiliation:(1) College of Water Resources and Environment, Hebei GEO University, Shijiazhuang; 050031, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Hebei Province Key Laboratory of Sustainable Use and Development of Water Resources, Shijiazhuang; 050031, China; (4) Hebei Ecological and Environmental Geology Research Center, Shijiazhuang; 050031, China; (5) School of Sciences, Hebei University of Science and Technology, Shijiazhuang; 050018, China Corresponding author:Bai, Zhi-Hui(zhbai@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:304-312 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to deal with low dissolved oxygen black odor water body of Guangdong-Hong Kong-Macao Greater Bay Area, the nitrogen metabolic capacity of ammoniated bacteria, nitrifying bacteria and denitrifying bacteria under low dissolved oxygen concentration was studied, and the relationship between denitrification efficiency and nitrogen conversion of different bacteria was clarified, which provided theoretical basis for the treatment of black odor water of Guangdong-Hong Kong-Macao Greater Bay Area. Nitrogen conversion characteristics of ammoniated bacteria (Staphylococcus sp. Ay), nitrifying bacteria (Microbacterium sp. Xw), and denitrifying bacteria (Arthrobacter sp. Fy) in simulated wastewater were detected by different concentration of bacteria and different concentration of substrates. The nitrogen metabolism of Ay, Xw and Fy in black odor water at the same concentration under low dissolved oxygen condition and the characteristics of nitrogen metabolism in different concentrations of black odor water were studied. The results showed that the bacterial concentration of Ay bacterium agent increased three times, but the ammoniation efficiency did not multiply. It indicated that increasing the concentration of ammoniated bacterium was not the best way to increase the ammoniation rate. Xw bacteria have a significant effect on the change of nitrate concentration. At 60 h, the nitrate concentration was increased 180% at low bacterial concentration, was 231% at a high bacterial concentration. Fy denitrification efficiency was high, that nitrate nitrogen can be removed quickly at lower concentration. Appropriate increase of total nitrogen concentration can increase the ammoniation efficiency of Ay microbial agent, but too high would inhibit the nitrogen metabolism efficiency of Ay microbial agent. The concentration of nitrate nitrogen of Xw bacterium reagent was increased (3736%) when the total nitrogen was 25 mg•L^-1. The Fy microbial agent has no obvious effect on ammonia nitrogen removal. When the total nitrogen concentration was 25 mg•L^-1, the removal rate of nitrate by Fy bacterium was the best. Overall, the results showed that the concentration of ammoniated bacteria and denitrifying bacteria could meet the need of nitrogen metabolism, and the nitrifying bacteria could increase the nitrate nitrogen synthesis rate with the increase of the concentration of nitrifying bacteria. In a certain range, increasing the concentration of substrate could increase the efficiency of nitrogen metabolism of bacterial agents, and excessive concentration would inhibit the effect of nitrogen metabolism. The study provides data support for the problem of black odor water in Guangdong-Hong Kong-Macao Greater Bay Area.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Bacteria Controlled terms:Ammonia - Biochemical oxygen demand - Clarification - Denitrification - Dissolution - Dissolved oxygen - Efficiency - Metabolism - Nitrates - Nitrification - Nitrogen removal - Substrates - Water treatment Uncontrolled terms:Ammonia nitrogen removal - Denitrification efficiencies - Denitrifying bacteria - Low dissolved oxygen - Metabolic capacities - Nitrate concentration - Nitrifying bacteria - Simulated wastewater Classification code:445.1 Water Treatment Techniques - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Mass_Density 2.50e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.80e+02%, Percentage 2.31e+02%, Percentage 3.74e+03%, Time 2.16e+05s DOI:10.13227/j.hjkx.201906227 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861777 Title:Distribution Characteristics of Disinfection By-Products and the Effects of Booster Chlorination in Long-Distance Water Supply Systems Title of translation:长距离供水系统中消毒副产物分布特征及二次加氯的影响 Authors:Bi, Wei-Wei (1); Ye, Sheng (1); Yu, Jian-Quan (1); Yang, Yu-Long (2); Chen, Chen (3); Li, Qing-Song (4); Ma, Xiao-Yan (1) Author affiliation:(1) College of Civil Engineering, Zhejiang University of Technology, Hangzhou; 310014, China; (2) College of Civil Engineering and Architecture, Zhejiang University, Hangzhou; 310058, China; (3) Zhejiang Tianzheng Design Engineering Co., Ltd., Hangzhou; 310000, China; (4) Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen; 361005, China Corresponding author:Ma, Xiao-Yan(mayaner620@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3297-3306 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:It is difficult for waterworks that add chlorine into finished water once to maintain sufficient residual chlorine at unfavorable points of the pipe network that supply water for large areas of coverage. Therefore, booster chlorination was employed for a long-distance water distribution system. The study was performed in H City with a water supply system serving about 400 km² of downtown and rural areas. The purpose of this work is to obtain the distribution characteristics of disinfection by-products (DBPs) in the booster chlorination disinfection pipe network through uniformly distributed sampling analysis. The results showed that detected DBPs include trichloromethane (TCM), bromodichloromethane (BDCM), dibromochloromethane (DBCM) and tribromomethane (TBM), dichloroacetic acid (DCAA), trichloroacetic acid (TCAA), dichloroacetonitrile (DCAN), bromochloroacetonitrile (BCAN), and trichloronitromethane (TCNM). The concentrations of the regulated DBPs were found to be lower than the standard limits specified in the Sanitary Standard for Drinking Water (GB5749-2006). Before booster chlorination, the average concentrations of the DBPs mentioned (expressed as mean±deviation) were (8.08±3.34), (9.77±2.91), (7.38±4.82), (2.65±2.02), (2.95±3.26), (6.02±6.06), (3.13±2.48), (1.61±2.05), and (0.15±0.10) μg•L^-1, while afterwards, they were increased to (10.30±4.55), (11.73±3.60), (8.23±5.22), (2.95±2.45), (3.29±3.60), (8.15±7.58), (3.31±2.61), (1.33±2.04), and (0.12±0.06) μg•L^-1, respectively. Trihalomethanes (THMs) and haloacetic acids (HAAs) increased by 6.32%-26.60% and 5.32%-42.71%, respectively, after booster chlorination. In addition, raw water quality and seasonal changes had a certain impact on the occurrence of DBPs. The levels of DBPs in summer were generally higher than those in spring or autumn. According to the analysis of DBP formation potential of source water, finished water, and tap water, it was found that the risk of DBPs exceeding the standard limit may exist in the water supply system of H City; therefore, further optimization of the treatment process should be considered to ensure water quality.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Potable water Controlled terms:Chlorination - Chlorine - Dichloroacetic acid - Disinfection - Quality control - Risk assessment - Trichloroacetic acid - Water distribution systems - Water quality - Water supply Uncontrolled terms:Average concentration - Dichloroacetic acids (DCAA) - Disinfection by-product - Disinfection byproducts - Distributed samplings - Distribution characteristics - Long distance water supplies - Trichloronitromethane Classification code:444 Water Resources - 445.2 Water Analysis - 446.1 Water Supply Systems - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Area 4.00e+08m2, Percentage 5.32e+00% to 4.27e+01%, Percentage 6.32e+00% to 2.66e+01% DOI:10.13227/j.hjkx.202001007 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990490 Title:Denitrification and Anaerobic Ammonium Oxidation in Soil Nitrogen Migration Process in a Farmland of Wanshandang Lake Title of translation:宛山荡农田土壤氮迁移过程反硝化与厌氧氨氧化 Authors:Chen, Zhi-Hao (1); Qin, Yun-Bin (1); Ding, Bang-Jing (1); Hu, You-You (1); Chen, Shi (1); Li, Zheng-Kui (1) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China Corresponding author:Li, Zheng-Kui(zhkuili@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:412-419 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the rate variation and contribution to N loss of denitrification and anaerobic ammonia oxidation (ANAMMOX) in the nitrogen migration process of farmland soils in southern China, we assess the physicochemical characteristics soil samples of different soil layers from farmland and different land use types (farmland, river channel, riparian zone, and lake sediment) in a wheat-rice rotation area of Wanshandang Lake. Illumina MiSeq sequencing and quantitative real-time polymerase chain reaction (qPCR) are used to investigate the microbial community composition and functional gene abundances of the samples. The potential denitrification and ANAMMOX rate (calculated by N2) of each sample was determined by an isotope culture experiment. It was demonstrated that the potential denitrification rate was significantly positively correlated with TOC, NH4⁺-N, and NO3^--N (P<0.05), and with the abundances of nirS, nirK, and nosZ (P<0.05). The denitrification rate of surface soils was (11.51±1.04) nmol•(g•h)^-1, which was significantly higher than other soil layers and other land use types (P<0.05). While the ANAMMOX rate in farmland soils was the highest in the 20-30 cm layer and reached (0.48±0.07) nmol•(g•h)^-1. In addition, denitrification was the main cause of N loss in surface soils of the studied farmland, accounting for 91.9%-99.7% of overall loss, and ANAMMOX played an important role in the production of N2 in deep soils.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Farms Controlled terms:Ammonia - Denitrification - Forestry - Lakes - Land use - Nitrogen - Nitrogen removal - Polymerase chain reaction - Soils - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Denitrification rate - Different land use types - Microbial community composition - Physicochemical characteristics - Potential denitrification - Quantitative real-time polymerase chain reaction - Wheat-rice rotations Classification code:403 Urban and Regional Planning and Development - 452.4 Industrial Wastes Treatment and Disposal - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 9.19e+01% to 9.97e+01%, Size 2.00e-01m to 3.00e-01m DOI:10.13227/j.hjkx.201904097 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517606 Title:Residual Characteristics and Health Assessment Analysis of OCPs and PCBs in Karst Groundwater Title of translation:岩溶地下水水体中有机氯农药和多氯联苯的残留特征及健康风险评价 Authors:Ye, Kai (1); Sun, Yu-Chuan (1, 2); Jia, Ya-Nan (1); Zhu, Lin-Yue (1); Xu, Xin (1) Author affiliation:(1) Chongqing Key Laboratory of Karst Environment, School of Geographical Sciences, Southwest University, Chongqing; 400715, China; (2) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi Zhuang Autonomous Region, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China Corresponding author:Sun, Yu-Chuan(sunyc@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5448-5457 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Residual levels of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in karst groundwater in Nanshan Laolongdong were measured using a gas chromatograph equipped with a micro-⁶³Ni electron capture detector to determine the residual characteristics including concentration, distribution, and source of OCPs and PCBs. Results revealed that the total concentration range of OCPs was 34.8-623.2 ng•L^-1, and the mean value was 215.6 ng•L^-1, among which the total concentration ranges of HCHs, DDTs, and other OCPs were 8.2-23.6, 4.5-363.7, and 22.2-235.9 ng•L^-1, respectively, and the mean values were 15.9, 104.5, and 95.3 ng•L^-1; the total concentration range of PCBs was 6.0-40.7 ng•L^-1, and the mean value was 16.8 ng•L^-1. Overall, the pollution of OCPs and PCBs was above average; the results of multiple comparisons revealed that statistically significant differences occurred in the concentration of some OCPs and PCBs. The pollution levels in the water of each sampling point in the study area were quite different; however, the seasonal distribution of OCPs and PCBs was relatively uniform. Source analyses revealed that HCHs' source was the input of lindane in the surrounding environment, DDTs recently originated from illegal use of industrial DDT, other OCPs originated from atmospheric deposition and agricultural input, and PCBs' sources included both historical remains and enterprise production processes. The results of Pearson correlation analyses revealed that some organo-halogen pollutants were homologous or had similar sources and decomposition mechanisms. According to health risk assessment model, drinking water in the study area would not cause obvious harm to human health, but children were more sensitive to pollutants than adults.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Organic pollutants Controlled terms:Agricultural robots - Correlation methods - Decomposition - Gas chromatography - Groundwater - Health - Health risks - Meteorological problems - Polychlorinated biphenyls - Potable water - Risk assessment - Water pollution Uncontrolled terms:Atmospheric depositions - Decomposition mechanism - Electron capture detectors - Organochlorine pesticides - Pearson correlation analysis - Polychlorinated biphenyl (PCBs) - Statistically significant difference - Surrounding environment Classification code:443.1 Atmospheric Properties - 444 Water Resources - 444.2 Groundwater - 453 Water Pollution - 461.6 Medicine and Pharmacology - 461.7 Health Care - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Mass_Density 1.68e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 2.16e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 2.22e-08kg/m3 to 2.36e-07kg/m3, Mass_Density 3.48e-08kg/m3 to 6.23e-07kg/m3, Mass_Density 6.00e-09kg/m3 to 4.07e-08kg/m3 DOI:10.13227/j.hjkx.202005107 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517748 Title:Technological Classification of Cadmium Quality in the Rice Producing Areas of South China Title of translation:我国南方水稻产地镉环境质量类别划分技术 Authors:Dou, Wei-Qiang (1); An, Yi (1); Qin, Li (1); Lin, Da-Song (1); Dong, Ming-Ming (1) Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China Corresponding author:Qin, Li(ql-tj@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5562-5570 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Classifying the quality of agricultural products is an important means of managing the arable land quality and guaranteeing the quality and safety of agricultural products. This work is planned to be completed in 2020. However, there is still no perfect method or technology for classifying the quality of arable lands. The species sensitivity distribution (SSD) has become commonly used for determining ecological safety thresholds since it takes into account differences in species sensitivity, the physical and chemical properties of soils, biological availability, and sources of pollutants. However, it has not yet been applied to the classification of arable land quality. Therefore, based on the routine monitoring data of rice production areas in southern China from the Agro-environmental Monitoring Center of China, this study proposes the use of species sensitivity distributions to classify the environmental quality of cadmium in rice production areas. The scientific rationale of this method was also discussed in order to provide an important reference for the construction and improvement of the classification system for arable land quality in China. The results showed that the pH, soil organic matter, and cation exchange capacity of the physical and chemical properties of soils significantly affected the enrichment of cadmium in rice, and this relationship was used to establish the cadmium transfer equation in the soil-rice system. It was found that there were obvious differences in the cadmium enrichment abilities of different rice varieties, which were mainly caused by the differences in their genotypes. According to the species sensitivity distributions, soil cadmium thresholds were obtained, which yielded a priority protection class of less than 0.26 mg•kg^-1 and strict control class of greater than 1.67 mg•kg^-1, between which are the safe use classes. The results were verified through independent datasets, and it was found that the application of species sensitivity distributions to classify the environmental quality of cadmium in rice producing areas reflected good scientific rationale and operability. This study may provide a foundation for the construction and improvement of the arable land quality classification system in China.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Classification (of information) Controlled terms:Agricultural products - Agricultural robots - Cadmium - Land use - pH - Population distribution - Soils Uncontrolled terms:Cation exchange capacities - Classification system - Environmental Monitoring - Environmental quality - Physical and chemical properties - Soil organic matters - Species sensitivity distributions - Technological classifications Classification code:403 Urban and Regional Planning and Development - 405.3 Surveying - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 716.1 Information Theory and Signal Processing - 801.1 Chemistry, General - 821.4 Agricultural Products DOI:10.13227/j.hjkx.202004162 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517751 Title:Bioaccumulation Characteristics of Quinolones (QNs) in Dominant Fish Species and Their Correlation with Environmental Factors in Baiyangdian Lake Title of translation:白洋淀优势鱼类中喹诺酮类抗生素的生物累积特征及其与环境因子相关性 Authors:Shen, Li-Na (1); Fu, Yu (1); Zhang, Lu-Lu (1); Qin, Shan (1); Ju, Ze-Jia (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; 050000, China Corresponding author:Zhang, Lu-Lu(zhanglulu19850703@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5470-5479 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, quinolone antibiotics (QNs), which easily bioaccumulate in aquatic organisms, have been widely detected in lake ecosystems, and the bioaccumulation and trophic transfer behavior are obviously spatiotemporally different. In this study, the bioaccumulation and trophic transfer behavior of fourteen QNs in nine dominant fish species were studied, the correlation with environmental factors was analyzed, and the health risk of QNs was evaluated in Baiyangdian Lake. The results showed that the mass concentrations of ∑QNs in water varied from 0.740 0 to 1 590 ng•L^-1. Furthermore, the detected frequencies of flumequine (FLU), oxolinic acid (OXO), and ofloxacin (OFL) were higher, and the average mass concentration of FLU was the highest. The content of ∑QNs in fish ranged from 17.1 to 146 ng•g^-1, and the average contents of ciprofloxacin (CIP) and OFL were higher. The bioaccumulation factors (BAF) were in the range of 96.2 (BAFMAR)-489 (BAFCIP) L•kg^-1, indicating the bioaccumulation of QNs was low in dominant fish species. The trophic magnification factors (TMF) of five QNs (enrofloxacin (ENR), FLU, marbofloxacin (MAR), norfloxacin (NOR), and OFL) varied from 0.714 (TMFMAR) to 1.33 (TMFENR), indicating ENR exhibited trophic magnification, while FLU, MAR, and ∑QNs exhibited trophic dilution. The results of correlation analysis between environmental parameters and BAF/TMF showed that pH, T, SD, DO, COD, TP, TN, NH4⁺-N, NO3^--N, and PO4^3--P were significantly related to the bioaccumulation of QNs in fish. The results of human health risk showed that the hazard quotient (HQ) of CIP (0.004 0-0.026) was significantly higher than that of other QNs (≤0.005 0), and the hazard indices (HI) ranged from 0.0010 to 0.035, indicating a high level of health risk. Therefore, to reduce the health risk, the standard and residue limits of QNs should be set in Baiyangdian Lake.
© 2020, Science Press. All right reserved. Number of references:57 Main heading:Queueing networks Controlled terms:Antibiotics - Aquatic ecosystems - Bioaccumulation - Biochemistry - Fish - Hazards - Health - Health risks - Lakes Uncontrolled terms:Bioaccumulation factor - Correlation analysis - Enrofloxacin (ENR) - Environmental factors - Environmental parameter - Mass concentration - Quinolone antibiotics - Trophic magnifications Classification code:454.3 Ecology and Ecosystems - 461 Bioengineering and Biology - 801.2 Biochemistry - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 1.59e-06kg/m3 DOI:10.13227/j.hjkx.202005129 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008950 Title:Improved on Nitrogen Removal of Anaerobic Ammonia Oxidation by Coupling Element Sulfur-based Autotrophic Short-cut Denitrification Title of translation:单质硫自养短程反硝化耦合厌氧氨氧化强化脱氮 Authors:Fang, Wen-Ye (1, 2); Li, Xiang (1, 2); Huang, Yong (1, 2); Guo, Chao-Ran (1, 2); Hu, Yu-Ting (1, 2); Tao, Ren-Jie (1, 2) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Huang, Yong(yhuang@mail.usts.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3699-3706 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to enhance the removal of NO3^--N in the ANAMMOX process, an element sulfur-based autotrophic short-cut denitrification (short-cut S⁰-SADN) was introduced by adding elemental sulfur to an ANAMMOX continuous flow reactor. The effects of different influent NH4⁺-N/NO2^--N ratios on the nitrogen conversion and NO2^--N competitive characteristics in the coupled system were investigated at (33±2)℃ and a pH of 7.8-8.2. The results showed that under different influent NH4⁺-N/NO2^--N ratios (1: 1.3, 1: 1.5, 1: 1, and 1: 1.1), the average total nitrogen (TN) removal efficiency of the coupled system reached 96.78%, 97.21%, 94.68%, and 97.72%, respectively, which were much higher than the highest TN removal efficiency of the ANAMMOX theory (89%). Among them, the stable operation of deep nitrogen removal of the short-cut S⁰-SADN coupled with ANAMMOX was successfully achieved with an influent NH4⁺-N/NO2^--N ratio of 1: 1 or 1: 1. 1. Under the optimal influent NH4⁺-N/NO2^--N ratio of 1: 1.1, the concentrations of influent NH4⁺-N and NO2^--N were 240 mg•L^-1 and 265 mg•L^-1, respectively, the TN removal rate reached 1.50 kg•(m³•d)^-1, and the TN removal efficiency of ANAMMOX and S⁰-SADN pathways were stable at (95.68±1.22)% and (2.04±0.77)%, respectively. During the entire operational process, ANAMMOX always occupied an absolute advantage in the competition of substrate NO2^--N, and the activity of ANAMMOX bacteria (NH4⁺-N/VSS) was stable at (0.166±0.008)kg•(kg•d)^-1.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Nitrogen removal Controlled terms:Ammonia - Denitrification - Efficiency - Nitrogen oxides - Sulfur - Wastewater treatment Uncontrolled terms:Ammonia oxidation - Anammox bacteria - Continuous flow reactors - Coupling element - Nitrogen conversion - Operational process - Removal efficiencies - Stable operation Classification code:452.4 Industrial Wastes Treatment and Disposal - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Mass_Density 2.40e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 2.65e-01kg/m3 to 2.20e-02kg/m3, Percentage 8.90e+01%, Percentage 9.47e+01%, Percentage 9.68e+01%, Percentage 9.72e+01%, Percentage 9.77e+01% DOI:10.13227/j.hjkx.202002055 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952746 Title:Concentration and Carbon Isotope Composition of DOC and DIC in the Miyun Reservoir Watershed in Summer Title of translation:北京密云水库流域水体夏季DOC和DIC质量浓度及同位素组成初探 Authors:Chen, Ji-Ji (1); Guo, Jing (1); Xu, Su-Shi (1); Tao, Lei (1); Jing, Hong-Wei (1) Author affiliation:(1) Beijing Municipal Environmental Monitoring Center, Beijing; 100048, China Corresponding author:Jing, Hong-Wei(jinghongwei@bjmemc.com.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4905-4913 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study aims to complement existing research on the carbon cycle of water in reservoirs, for the effective control of nutrient input in drinking water. The content and isotopic compositions of water dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) from the Miyun Reservoir watershed in Beijing were studied, and water from the Jingmi diversion canal was also studied as a baseline reference. The results showed that the content of DOC in the Miyun Reservoir watershed in summer varied from 1.07 to 5.19 mg•L^-1, with an average value of 2.61 mg•L^-1. DOC in tributaries was lower than that of most rivers in China and globally, while DOC in reservoirs, particularly in Miyun Reservoir, was high. The high water level might be the main reason for the high DOC in the Miyun Reservoir. In summer, theδ¹³CDOC in the Miyun Reservoir watershed ranged from -27.4‰to -24.3‰, with an average value of -25.8‰. Results from the isotopic analysis showed that the water in the Miyun Reservoir watershed was less affected by human sources, with the exception of some points. In summer, DOC in tributaries and in the Miyun Reservoir was mainly derived from soil organic matter and terrestrial C3 plants. In addition, endogenous substances also contributed to DOC in the watershed. DOC concentration increased along the Chao and Bai Rivers, and DOC from soil erosion and human sources was higher in the Chao River. The δ¹³CDIC in the study area varied from -12.6‰ to 5.75‰, with a mean value of -9.44‰. The weathering of carbonate rocks accounted for the major river DIC, and DIC had been clearly assimilated by the phytoplankton by photosynthesis. DOC and DIC in the Miyun Reservoir were significantly higher than in the Jingmi diversion canal (P<0.01), and the δ¹³CDIC in the Miyun Reservoir showed a clear positive deviation. This indicated that there were differences in carbon concentration and components in the two kinds of water, which might affect the denitrification capacity of the water in the Miyun Reservoir after mixing. In general, the dissolved carbon in the water of the Miyun Reservoir watershed is less affected by human sources. The conversion of DIC to DOC may also be a potential source of DOC in the study area.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Potable water Controlled terms:Dissolution - Hydraulic structures - Isotopes - Organic carbon - Rivers - Water levels - Watersheds - Weathering Uncontrolled terms:Carbon concentrations - Carbon isotope composition - Denitrification capacity - Dissolved inorganic carbon - Dissolved organic carbon - Endogenous substances - Isotopic composition - Soil organic matters Classification code:444 Water Resources - 444.1 Surface Water - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.07e-03kg/m3 to 5.19e-03kg/m3, Mass_Density 2.61e-03kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202002185 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952742 Title:Sustained Effects of Remediation Materials on Soil Copper Remediation Under Oil-Rice Rotation Title of translation:油-稻轮作模式下修复材料对土壤铜修复的持续性影响 Authors:Zhao, Ying-Ying (1); Li, Hong-Chuan (1); Hu, Hong-Xiang (1); Xue, Zhong-Jun (1); Liu, Na (1); Wu, Meng-Jun (1) Author affiliation:(1) School of Resources and Environment, Anhui Agriculture University, Hefei; 230036, China Corresponding author:Hu, Hong-Xiang(hongxianghu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5168-5175 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, a continuous rape-rice rotation plot experiment was conducted over three years. Repair materials were continuously applied in the first two years, and no repair materials were applied in the second year. The repair effects of hydroxyapatite, lime, biochar, bio-organic fertilizer, and nano-materials on copper contaminated soil and the enrichment of copper in different parts of rape and rice were investigated. The results show that hydroxyapatite, lime, and nanomaterials can significantly increase soil pH, and different restoration materials can effectively inhibit the movement of soil copper. The effective copper treatment with lime restoration soil had the largest decrease. The four seasons of continuous application of restoration materials were 38.9%, 34.9%, 27.88%, and 29.04%, respectively, and the subsequent effect of lime passivation of effective copper was better than other restoration materials. The application of the repair material significantly reduced the copper content in edible parts of rape and rice. In the four seasons of application of the repair material, the maximum copper content in edible parts of different crops decreased by 46.03%, 22.2%, 29.44%, and 31.71%, respectively. Due to the application effect of the repair material, the copper content in the edible part of the two season crops, without the repair material, did not exceed the national food safety limit. With the use of different repair materials, the yields of rapeseed and rice were improved. This test can provide some theoretical basis and technical support for soil improvement in copper-contaminated areas.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Copper Controlled terms:Crops - Fertilizers - Food safety - Hydroxyapatite - Lime - Oils and fats - Remediation - Restoration - Soil pollution - Soils Uncontrolled terms:Application effect - Copper treatment - Copper-contaminated - Organic fertilizers - Repair materials - Restoration materials - Soil improvement - Technical support Classification code:454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 544.1 Copper - 804 Chemical Products Generally - 821.4 Agricultural Products Numerical data indexing:Percentage 2.22e+01%, Percentage 2.79e+01%, Percentage 2.90e+01%, Percentage 2.94e+01%, Percentage 3.17e+01%, Percentage 3.49e+01%, Percentage 3.89e+01%, Percentage 4.60e+01% DOI:10.13227/j.hjkx.202004030 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953321 Title:Spatio-temporal Evolution of PM2.5 Concentration During 2000-2019 in China Title of translation:2000~2019年中国PM2.5时空演化特征 Authors:Xia, Xiao-Sheng (1, 2); Wang, Jun-Hong (3); Song, Wei-Dong (1, 2, 4); Cheng, Xian-Fu (1, 2) Author affiliation:(1) College of Geography and Tourism, Anhui Normal University, Wuhu; 241002, China; (2) Provincial Key Laboratory of Natural Disaster Process and Prevention, Wuhu; 241002, China; (3) Huoshan Solid and Water Conservation and Experimental Station, Lu'an; 237266, China; (4) China Shipping Environment Technology (Shanghai) Co., Ltd., Hefei; 230001, China Corresponding author:Cheng, Xian-Fu(xianfucheng@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4832-4843 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An ensemble estimation model of PM2.5concentration was proposed on the basis of extreme gradient boosting, gradient boosting, random forest model, and stacking model fusion technology. Measured PM2.5 data, MERRA-2 AOD and PM2.5 reanalysis data, meteorological parameters, and night light data sets were used. On this basis, the spatiotemporal evolution features of PM2.5 concentration in China during 2000-2019 were analyzed at monthly, seasonal, and annual temporal scales. The results showed that: (1) Monthly PM2.5 concentration in China from 2000-2019 can be estimated reliably by the ensemble model. (2) PM2.5 annual concentration changed from rapid increase to remaining stable and then changed to significant decline from 2000-2019, with turning points in 2007 and 2014. The monthly variation of PM2.5 concentration showed a U shape that first decreased then increased, with the minimum value in July and the maximum value in December. (3) Natural geographic conditions and human activities laid the foundation for the annual spatial pattern change of PM2.5 concentration in China, and the main trend of monthly spatial pattern change of PM2.5 concentration was determined by meteorological conditions. (4) At an annual scale, the national PM2.5 concentration average center of standard deviation ellipse moved eastward from 2000-2014 and westward from 2014-2018. At a monthly scale, the average center shifted to the west from January to March, moved northward then southward from April to September, and shifted to the east from September to December.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Decision trees Uncontrolled terms:Ensemble modeling - Geographic conditions - Meteorological condition - Meteorological parameters - PM2.5 concentration - Random forest modeling - Spatiotemporal evolution - Standard deviation Classification code:961 Systems Science DOI:10.13227/j.hjkx.202004108 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953254 Title:Effects of Intercropping of Brassica chinenesis L. and Tagetes patula L. on the Growth and Cadmium Accumulation of Plants Title of translation:叶用油菜和孔雀草间作对植物生长和镉累积的影响 Authors:Yan, Xiu-Xiu (1, 2); Xu, Ying-Ming (1, 2); Wang, Lin (1, 2); Tao, Xue-Ying (1, 2); Sun, Yue-Bing (1, 2); Liang, Xue-Feng (1, 2) Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (2) Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China Corresponding author:Wang, Lin(wanglin2017@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5151-5159 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A pot experiment was conducted to reveal the effects of intercropping a low-cadmium (Cd) accumulating cultivar and a Cd hyperaccumulator on the safe utilization and phytoextraction of Cd-polluted soils. Two cultivars of Brassica chinensis L. (the low-Cd accumulating cultivar Huajun, and the common cultivar Hanlü), were intercropped with four cultivars of Tagetes patula L. (Dwarf Red, Dwarf Yellow, Tall Red, and Tall Yellow). We examined the biomass, photosynthetic characteristics, and Cd accumulation in the plants and available Cd content and dissolved organic carbon (DOC) content in the soils. The results show that under the intercropping treatments, the biomass of B. chinensis decreased significantly and those of T. patula increased significantly, compared with the monoculture treatments. When intercropped with T. patula, the net photosynthetic rate, stomatal conductance, and transpiration rate in the leaves of B. chinensis decreased significantly, compared with the monoculture treatments. When Huajun was intercropped with Dwarf Red, the shoot Cd content of Huajun significantly decreased by 14.5%, and that of Dwarf Red increased significantly by 36.5% compared with the monoculture. Under the other intercropping treatments, the shoot Cd content of B. chinensis increased significantly, or showed no significant change, and that of T. patula showed no significant change. Under the intercropping treatments, the total amount of Cd in the shoot of B. chinensis decreased significantly, and that of T. patula increased significantly, compared with the monoculture. There were no significant differences in the Cd extraction ratios between the intercropping treatments and the monoculture of T. patula. The shoot Cd content of B. chinensis was significantly correlated with soil available Cd content and DOC content (P<0.01 and P<0.05, respectively). In conclusion, the intercropping treatment of Huajun and Dwarf Red significantly reduced shoot Cd content in B. chinensis and increased that in T. patula, and it did not affect the Cd extraction ratio. This is suitable for the safe utilization and phytoextraction of Cd-polluted soils.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Soil pollution Controlled terms:Cadmium - Extraction - Organic carbon - Plants (botany) - Soils Uncontrolled terms:Cd-hyperaccumulator - Dissolved organic carbon - Extraction ratio - Net photosynthetic rate - Photosynthetic characteristics - Phytoextraction - Stomatal conductance - Transpiration rates Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Percentage 1.45e+01%, Percentage 3.65e+01% DOI:10.13227/j.hjkx.202004245 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952735 Title:Influence of Meteorological Conditions on Ozone Pollution at Shangdianzi Station Based on Weather Classification Title of translation:基于天气分型的上甸子大气本底站臭氧污染气象条件 Authors:Wu, Jin (1, 2); Li, Chen (3); Ma, Zhi-Qiang (1, 2); Sun, Zhao-Bin (1); Zhu, Xiao-Wan (2); Dong, Fan (2) Author affiliation:(1) Institute of Urban Meteorology, China Meteorological Administration, Beijing; 100089, China; (2) Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing; 100089, China; (3) Beijing Meteorological Service Center, Beijing; 100089, China Corresponding author:Ma, Zhi-Qiang(zqma@ium.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4864-4873 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As a typical secondary pollutant, tropospheric ozone has become the primary pollutant in Beijing in spring and summer, and meteorological factors are one of the main factors affecting the change in concentration. Using atmospheric composition and meteorological observation data from 2008 to 2017, the weather types in Beijing were divided into six categories by Lamb classification and Mann-Whitney U test. Among these, the mean and extreme values of ozone concentration of SWW and C types at Shangdianzi station were the highest, and the highest frequency was from April to September, with a total of 47.4%. The main contribution weights of the two types were determined by a multiple stepwise regression equation. The southwest wind prevailed in 54.0% of SWW and C types, and the newly discharged pollutants and secondary aging air masses were continuously transported by the southwest air flow. The vertical velocity zero layer appeared near 850 hPa. The horizontal and vertical meteorological conditions were conducive to the transport, accumulation, and secondary generation of ozone. The northeast wind prevailed in 64.7% of AN and ESN types, and the air masses source was clean. The same subsidence movement and air divergence prevailed above 1 000 hPa. The discharged pollutants can also be diluted and diffused quickly, and the ozone concentration was at a low value. Taking the NW type on May 3, 2015 as an example, although the northwest air flow prevailed on the ground, with clean source, the residual high concentration of ozone above the boundary layer was transported to the near ground through the vertical subsidence of the atmosphere, resulting in the high concentration of ozone on some days.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Air pollution Controlled terms:Air - Atmospheric composition - Atmospheric movements - Boundary layers - Ozone - Ozone layer - Subsidence Uncontrolled terms:Mann-Whitney U test - Meteorological condition - Meteorological factors - Meteorological observation - Multiple stepwise regression - Ozone concentration - Subsidence movement - Weather classification Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally Numerical data indexing:Percentage 4.74e+01%, Percentage 5.40e+01%, Percentage 6.47e+01%, Pressure 1.00e+05Pa, Pressure 8.50e+04Pa DOI:10.13227/j.hjkx.202003307 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256366 Title:Sedimentary Diatom Records Reveal the Succession of Ecosystem in Lake Xihu, Dali over the Past 50 Years Title of translation:硅藻群落指示的近50年来大理西湖湖泊生态系统演变规律 Authors:Zhang, Chen-Xue (1, 2); Xu, Min (2); Dong, Yi-Fan (2, 3); Wang, Rong (2); Fang, Feng-Man (1) Author affiliation:(1) School of Geography and Tourism, Anhui Normal University, Wuhu; 241003, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Xu, Min(mxu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4572-4580 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent decades, intense human activities have caused a decline in many lake ecosystems in Yunnan Province, rendering the transformation of the lake from a clear macrophyte-dominated state to a turbid phytoplankton-dominated state. Improved understanding of the ecological changes in lake ecosystem has significant implications for management. In this study, a small lake in Dali Prefecture of Yunnan Province, i.e., Lake Xihu, was selected. Combined with diatom records and physicochemical proxies from the lake sediments, this paper focuses on the long-term ecological changes in Lake Xihu, Dali since the mid-1960s. The results show that the Lake Xihu, Dali has undergone a significant shift in stable states over the past 50 years. Prior to 2000, the benthic-epiphytic species (i.e., Cocconeis placentula, Staurosira construens, Gomphonema angustum, and Achnanthidium minutissimum) dominated in diatom assemblages, indicating oligotrophic conditions; since 2000, benthic-epiphytic species (i.e., Encyonopsis microcephala and Navicula cryptocephala) and planktonic species (i.e., Cyclotella atomus, Cyclotella meneghiniana, Stephanodiscus hantzschii, and Aulacoseira granulata) dominated successively, indicating mesotrophic to eutrophic conditions. Principal component analysis based on the diatom assemblages in temporal scale showed the response of diatoms succession to nutrients. Redundancy analysis also confirmed that nutrient enrichment was the main driving force for the succession of diatom assemblages in Lake Xihu, Dali. In the past 50 years, climate change and human activities (i.e., agricultural reclamation, fertilization, animal husbandry, and fishery) have enhanced the accumulation of nutrients in the lake. The continuous loading of nutrients promoted the propagation of planktonic algae, and also the productivity of the lake, rendering the transformation to a turbid phytoplankton-dominated state.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Lakes Controlled terms:Agricultural robots - Agriculture - Climate change - Ecosystems - Nutrients - Phytoplankton Uncontrolled terms:Animal husbandry - Diatom assemblage - Ecological changes - Human activities - Nutrient enrichments - Oligotrophic conditions - Redundancy analysis - Yunnan province Classification code:443.1 Atmospheric Properties - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Age 5.00e+01yr DOI:10.13227/j.hjkx.202003293 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008887 Title:Restoration of River Sediment by Calcium Peroxide(CaO2) Combined with Biochar Title of translation:过氧化钙(CaO2)联合生物炭对河道底泥的修复 Authors:Li, Yu-Ping (1, 2); Jiang, Ying-Ying (1, 2); Liu, Bao-Ming (1, 2); Ruan, Wen-Quan (1, 2, 3); Miao, Heng-Feng (1, 2, 4) Author affiliation:(1) School of Environmental & Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi; 214122, China; (3) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China; (4) Jiangsu Engineering Laboratory of Biomass Energy and Carbon Reduction Technology, Wuxi; 214122, China Corresponding author:Miao, Heng-Feng(hfmiao@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3629-3636 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The internal source pollution of sediment is the main factor leading to the repetition of black-odorous river channels. In order to prevent this situation, a river channel in the Binhu District of Wuxi City was used as an experimental site. In-situ CaO2 combined with a biochar covering technology was used to repair the black odorous river sediment in this channel. The effects of this technology on the quality of mud water, sedimentary volatile sulfide (AVS) and phosphorus forms, microorganisms, and restoration of black odorous sediment were investigated. The results showed that CaO2 combined with biochar coverage could significantly increase the dissolved oxygen (DO) concentration and redox potential (ORP) of the muddy water system. The DO concentration and ORP in the overlying water were maintained above 2 mg•L^-1 and 50 mV, respectively. The removal rates of interstitial water ammonia-nitrogen (NH4⁺-N), chemical oxygen demand (COD), and total phosphorus (TP) reached 43.40%, 41.18%, and 50.97%, respectively. The removal rate of AVS in the sediment reached 37.03%. The high-throughput sequencing showed that the relative abundance of anaerobic microorganisms in the sediment was significantly reduced, and that nitrogen and sulfur removal microorganisms appeared (e. g., Thermomonas, Dechloromonas, Proteus hauser, Desulfomicrobium, and Thiobacillus). Phosphorus in the sediment was converted into Fe/Al-P and Ca-P. Therefore, in-situ CaO2 combined with biochar coverage had a good repairing effect on black odorous sediment.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:River pollution Controlled terms:Aluminum compounds - Ammonia - Biochemical oxygen demand - Calcium compounds - Dissolved oxygen - Indium compounds - Iron compounds - Microorganisms - Nitrogen - Nitrogen removal - Phosphorus - Redox reactions - Restoration - Rivers - Sediments - Sulfur compounds Uncontrolled terms:Anaerobic microorganisms - Calcium peroxides - Dissolved oxygen concentrations - DO concentration - High-throughput sequencing - Interstitial water - Redox potentials - Relative abundance Classification code:453 Water Pollution - 461.9 Biology - 483 Soil Mechanics and Foundations - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 2.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 3.70e+01%, Percentage 4.12e+01%, Percentage 4.34e+01%, Percentage 5.10e+01%, Voltage 5.00e-02V DOI:10.13227/j.hjkx.201912207 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104885 Title:Effect of Nutrient Regulation and Control on Cd Accumulation Efficiency of Hylotelephium spectabile Under Field Conditions Title of translation:田间条件下养分调控八宝景天Cd修复效率 Authors:Guo, Jun-Mei (1, 2); Yang, Jun-Xing (1, 2); Yang, Jun (1, 2); Zheng, Guo-Di (1, 2); Zhou, Xiao-Yong (3); Chen, Tong-Bin (1, 2); Bian, Jian-Lin (4); Meng, Xiao-Fei (1, 2); Li, Yu-Feng (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 Remediation Environmental Restoration Co., Ltd., Beijing; 100015, 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:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4226-4233 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A field experiment with an orthogonally designed experiment L9(3⁴) was designed to investigate the effect of different N, P, and K levels on plant growth and Cd uptake by Hylotelephium spectabile. The results showed that the biomass of H. spectabile significantly increased with the N application rate. The highest dry weight in the shoot occurred in the treatments with a high level of N (337.5 kg•hm^-2), which was 0.86-2.00 times higher than the value with no fertilizer treatment. The addition of K contributed to promoting the Cd absorption of H. spectabile, while no effect was observed when N and P were added. Consequently, NPK fertilizers contribute to increasing the Cd uptake of H. spectabile, and the N and K fertilizer play important role in plant growth and Cd absorption respectively. Moreover, the effect of fertilizers on Cd uptake of H. spectabile was in the order of N>K>P, which indicated that N fertilizer was the main factor for promoting the Cd phytoextraction efficiency of H. spectabile by increasing the biomass. Therefore, the application of high levels of N combined with moderate levels of P and K will be an effective approach to improve the Cd phytoremediation efficiency of H. spectabile by promoting its growth, and the Cd uptake can be increased by a factor of 0.9-2.2 compared to no fertilizer treatment condition.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Cadmium Controlled terms:Bioremediation - Efficiency - Fertilizers - Soil pollution control Uncontrolled terms:Application rates - Designed experiments - Effective approaches - Field conditions - Field experiment - Phytoextraction efficiencies - Regulation and control - Treatment conditions Classification code:454.2 Environmental Impact and Protection - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 913.1 Production Engineering DOI:10.13227/j.hjkx.202002199 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009255958 Title:Emission Characteristics of Nitrogen and Phosphorus in a Typical Agricultural Small Watershed in Tuojiang River Basin Title of translation:沱江流域典型农业小流域氮和磷排放特征 Authors:Wang, Hong (1); Xu, Ya-Ling (1); Zhang, Qi (1); Lin, Chao-Wen (1); Zhai, Li-Mei (2); Liu, Hai-Tao (1); Pu, Bo (3) Author affiliation:(1) Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu; 610066, China; (2) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (3) Chengdu Soil and Fertilizer Testing Center, Chengdu; 610041, China Corresponding author:Lin, Chao-Wen(lcw-11@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4547-4554 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The emission of nitrogen and phosphorus via non-point source pollution from a small watershed has become the main pollution source of river waters, while climatic conditions and human activities directly affect the changes in rainfall-runoff and types of land use that are closely related to nitrogen and phosphorus pollution. In this study, we explore the runoff loss, nitrogen and phosphors concentration, and nitrogen and phosphorus emission in Huajiaogou small watershed on the upper reaches of Yangtze River. The rainfall, runoff, and temporal changes of nitrogen and phosphorus were analyzed using the continuous position monitoring data. The results showed that: ① the runoff volumes were 10.05×10⁵ m³ and 3.34×10⁵ m³ from July 1^st to September 30^th, accounting for 76.58% and 56.51% in 2012 and 2013, respectively, and they were positively correlated to rainfall. The peak concentrations of ammonia nitrogen (NH4⁺-N) from April 1^st to June 30^th were 11.51 mg•L^-1 and 4.44 mg•L^-1in 2012 and 2013, respectively. ② The NH4⁺-N emission risk period was from July 1^st to September 30^th, accounting for 78.45% and 62.24% in 2012 and 2013, respectively. The peak concentration and emission risk period of total nitrogen (TN) and nitrate nitrogen (NO3^--N) were from July 1^st to September 30^th, and NO3^--N was the main form of the total nitrogen emission. The peak concentration of NO3^--N was 6.06 mg•L^-1 and 11.43 mg•L^-1in 2012 and 2013, respectively, and the loss in NO3^--N from July 1^st to September 30^th accounted for 88.74% and 65.55% in 2012 and 2013, respectively. ③ The emission risk period of total phosphorus (TP), dissolved total phosphorus (DTP), and particulate phosphorus (PP) was also from July 1^st to September 30^th, and the particulate phosphorus was the main form of the total phosphorus emission. The particulate phosphorus emission from July 1^st to September 30^th accounted for 36% and 68% in 2012 and 2013, respectively, and the ration of particle phosphorus to total phosphorus was easily affected by rainfall.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:River pollution Controlled terms:Ammonia - Land use - Particles (particulate matter) - Particulate emissions - Phosphorus - Rain - Rivers - Runoff - Water pollution control - Watersheds Uncontrolled terms:Climatic conditions - Emission characteristics - Emission of nitrogen and phosphorus - Nitrogen and phosphorus - Non-point source pollution - Particulate phosphorus - Peak concentrations - Position monitoring Classification code:403 Urban and Regional Planning and Development - 443.3 Precipitation - 444.1 Surface Water - 451.1 Air Pollution Sources - 453 Water Pollution - 453.2 Water Pollution Control - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Mass_Density 1.15e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 6.06e-03kg/m3 to 2.20e-02kg/m3, Percentage 3.60e+01%, Percentage 5.65e+01%, Percentage 6.22e+01%, Percentage 6.55e+01%, Percentage 6.80e+01%, Percentage 7.66e+01%, Percentage 7.85e+01%, Percentage 8.87e+01% DOI:10.13227/j.hjkx.202003213 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278074 Title:Responses of Soil Organic Carbon Fractions to Land Use Types in Hilly Red Soil Regions, China Title of translation:红壤丘陵区土壤有机碳组分对土地利用方式的响应特征 Authors:Zhang, Xiao-Fang (1, 2); Zheng, Sheng-Meng (1, 2); Xia, Yin-Hang (1, 2); Hu, Ya-Jun (1); Su, Yi-Rong (1); Chen, Xiang-Bi (1) Author affiliation:(1) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Chen, Xiang-Bi(xbchen@isa.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1466-1473 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Land use type exerts important influences on soil organic carbon (SOC) and its fractions, and determines the stability of the carbon pool. Taking woodland as a reference, the content of SOC and its labile fractions [dissolved organic carbon (DOC), microbial biomass carbon (MBC), and particulate organic carbon (POC)] and non-labile fractions [mineral-associated organic carbon (MAOC)] in upland and paddy surface soils in hilly red soil regions were determined to explore the responses of SOC fractions to land use type. The results showed that the contents of SOC, MBC, POC, and MAOC ranked highest in paddy compared with upland and woodland. DOC content in woodland was significantly higher than in upland and paddy (P<0.001). The proportion of each SOC fraction, i.e. DOC/SOC, MBC/SOC, POC/SOC, and MAOC/SOC, was in the range of 0.22%-0.93%, 1.62%-2.70%, 31.08%-40.00%, and 43.22%-56.82%, respectively. The contents of labile fractions (MBC and POC) and their proportions (MBC/SOC and POC/SOC) were in the order of paddy>woodland>upland. MAOC content ranked the highest in paddy but the lowest in upland, while MAOC/SOC exhibited the opposite trend. The correlation suggested that the labile fractions (MBC and POC) and inert fraction (MAOC) were significantly positively correlated with SOC (P<0.001) in the three land use types, while no significant correlations were found between DOC and SOC and its fractions (P>0.05). There was a significant positive correlation between POC and MBC in upland and woodland (P<0.001). POC was significantly positively correlated with MAOC in the three land use types (P<0.001). MAOC and MBC in paddy and upland were significantly positively correlated (P<0.001). Therefore, compared with upland and woodland, SOC in paddy had a higher proportion of labile SOC fraction, but a lower proportion of inert fraction. Moreover, MBC content in paddy was not related to the accumulation of the labile fraction of POC, but positively related to the accumulation of the inert fraction of MAOC. In summary, agricultural land uses have great influence on SOC and its fractions in hilly red soil regions. Though paddy is beneficial for SOC sequestration, the proportions of labile fractions in its SOC are relatively higher, and thus it is vulnerable to loss due to improper agricultural management.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Organic carbon Controlled terms:Agricultural robots - Agriculture - Land use - Landforms - Mineral exploration - Soils Uncontrolled terms:Paddy - Red soils - Soil organic carbon - Upland - Woodland Classification code:403 Urban and Regional Planning and Development - 481.1 Geology - 483.1 Soils and Soil Mechanics - 501.1 Exploration and Prospecting Methods - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 2.20e-01% to 9.30e-01%, Percentage 4.32e+01% to 5.68e+01% DOI:10.13227/j.hjkx.201908218 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861914 Title:Transport Characteristics of Phosphorus Sources at the Multi-scale Watershed and the Associated Ecological Effects on Poyang Lake Title of translation:鄱阳湖多尺度流域磷源输送特征及其生态效应 Authors:Wang, Shuo-Yue (1, 2); Gao, Yang (1, 2); Lu, Yao (1, 2); Jia, Jun-Jie (1, 2); Li, Zhao-Xi (1, 2); Ma, Ming-Zhen (1, 2); Wen, Xue-Fa (1, 2) Author affiliation:(1) Key Laboratory of Ecosystem Network Observation and Modeling, 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:Gao, Yang(gaoyang@igsnrr.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3186-3193 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, a cascaded watershed system in the Poyang Lake area was selected as the study site, which ranged from the primary tributaries to the lake area (Xiangxi River→Jiazhu River→Ganjiang River→Poyang Lake). The aims of the study were to monitor the P wet deposition and runoff process in the Poyang Lake area and discuss the P transport characteristics at the multi-scale watershed and its impact on phytoplankton community structure in the Poyang Lake. The results showed that the P concentration in the Poyang Lake area exhibited significant seasonal changes. Apart from the Xiangxi River watershed, the concentrations of total phosphorus (TP), dissolved total phosphorus (DTP), and orthophosphate(PO4^3-) were higher in the low flow period than in the high flow period at other watersheds. There was a significant correlation between TP concentration and diatom density during the high flow period, and between TP concentration and cryptophyta during the low flow period. The order of the amounts of TP and PO4^3- transport by runoff under different rain intensities is as follows: light rain>moderate rain>heavy rain. There is a significant difference in the deposition flux between the wet season and the dry season with seasonal change, in which the flux during the wet years was about 2.8 times higher than in the dry years. The export flux of P was also shown to be higher in the high flow than in the low flow period. As watershed size increased, the contribution rate of P export did not increase, indicating that P transported at different scales was not the main source of P in each watershed.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Lakes Controlled terms:Deposition - Phosphorus - Rain - Rivers - Runoff - Watersheds Uncontrolled terms:Contribution rate - Deposition fluxes - Ecological effect - Phosphorus sources - Phytoplankton community - Poyang lake area - Seasonal changes - Transport characteristics Classification code:443.3 Precipitation - 444.1 Surface Water - 802.3 Chemical Operations - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201910074 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796208 Title:Degradation of RBK5 by High Crystallinity Mn-Fe LDH Catalyst Activating Peroxymonosulfate Title of translation:高晶度Mn-Fe LDH催化剂活化过一硫酸盐降解偶氮染料RBK5 Authors:Li, Li (1, 2); Wu, Li-Ying (1, 2); Dong, Zheng-Yu (1, 2); Wang, Ji (1, 2); Zhang, Qian (1, 2); Hong, Jun-Ming (1, 2) Author affiliation:(1) College of Chemical Engineering, Huaqiao University, Xiamen; 361021, China; (2) Fujian Province Engineering Research Center of Industrial Wastewater Biochemical Treatment, Xiamen; 361021, China Corresponding author:Hong, Jun-Ming(jmhong@hqu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2736-2745 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:High crystallinity Mn-Fe LDH was synthesized by improved co-precipitation combined with the hydrothermal method and was utilized as a catalyst for peroxymonosulfate (PMS) activation to degrade reactive black 5. The high crystal purity and clear lamellar structure were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The operating parameters such as Mn/Fe molar ratio, catalyst dosage, PMS concentration, and initial pH value on the absorption efficiency, catalytic degradation, and reaction kinetics of RBK5 were also investigated. The results demonstrated that high crystallinity Mn-Fe LDH has good adsorption capacity and high catalytic efficiency. The degradation efficiency of RBK5 (20 mg•L^-1) could reach 86% within 90 min when the Mn/Fe molar ratio was 1, the catalyst dosage was 0.2 g•L^-1, the PMS concentration was 1 mmol•L^-1, and the initial pH value was 7.0. The reaction process follows pseudo-first-order reaction kinetics (R²>0.9). In addition, the quenching experiment indicated that SO4^-• and •OH were the main active species that degraded RBK5 from the Mn-Fe LDH/PMS system. The XPS analysis of the catalyst before and after the reaction confirmed the synergistic effect between Mn and Fe. The charge balance between Mn(Ⅱ) and Fe(Ⅲ) on the LDH surface and CO3^2- in layers stabilized the structure, thus promoting the synergistic effect of Mn and Fe on the lamellar surface and improving the activation efficiency of PMS by Mn-Fe LDH. Three-dimensional fluorescence and the UV-Vis scanning spectral analysis were preliminarily discussed to understand the degradation process of RBK5.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Manganese metallography Controlled terms:Association reactions - Catalysts - Chemical activation - Chromium alloys - Chromium metallography - Crystal structure - Crystallinity - Degradation - Fourier transform infrared spectroscopy - Iron alloys - Iron compounds - Iron metallography - Lamellar structures - Manganese alloys - Molar concentration - Molar ratio - pH - Reaction kinetics - Scanning electron microscopy - Spectrum analysis - X ray photoelectron spectroscopy - X ray spectrometers Uncontrolled terms:Absorption efficiency - Activation efficiency - Catalytic degradation - Catalytic efficiencies - Degradation efficiency - Energy dispersive x-ray spectrometers - Pseudo-first order reactions - Three-dimensional fluorescences Classification code:543.1 Chromium and Alloys - 543.2 Manganese and Alloys - 545.1 Iron - 545.2 Iron Alloys - 741.3 Optical Devices and Systems - 801 Chemistry - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 933.1.1 Crystal Lattice Numerical data indexing:Mass_Density 2.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e-02kg/m3 to 2.20e-02kg/m3, Molar_Concentration 1.00e+00mol/m3 to 2.20e-02mol/m3, Percentage 8.60e+01%, Time 5.40e+03s DOI:10.13227/j.hjkx.201912100 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990444 Title:Source Appointment of Heavy Metals in Agricultural Soils of the Jiulong River Basin Based on Positive Matrix Factorization Title of translation:基于PMF模型的九龙江流域农田土壤重金属来源解析 Authors:Huang, Hua-Bin (1, 2); Lin, Cheng-Qi (2); Hu, Gong-Ren (1); Yu, Rui-Lian (1); Hao, Chun-Li (2); Chen, Feng-Hua (2) Author affiliation:(1) College of Chemical Engineering, Huaqiao University, Xiamen; 361021, China; (2) College of Environment and Public Health, Xiamen Huaxia University, Xiamen; 361024, China Corresponding author:Hu, Gong-Ren(grhu@hqu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:430-437 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to study the source appointment of heavy metals in agricultural soils of the Jiulong River Basin, Fujian Province, China. 71 agricultural soil samples were collected in July 2017. The concentrations of heavy metals in agricultural soils were determined by inductively coupled plasma mass spectrometry (ICP-MS) and atomic fluorescence spectrometry (AFS). Here, we use a positive matrix factorization (PMF) model for the source appointment of heavy metals in the sampled soils. The results showed that most of the heavy metal concentrations in the sampled agricultural soils were higher than soil background concentrations for the Fujian Province. The concentrations of Cd, Zn, Pb, and Cu in some soil samples were greater than the screening value of the Chinese soil pollution risk levels for agricultural land (GB 15618-2018). The spatial distributions of heavy metals showed a moderate variation across three regions of the study area (i.e., the North River watershed, West River watershed, and the estuary area). The highest concentration of Cr, Ni, Cu, Zn, and Cd were found in Longyan City (North River watershed), the highest concentrations of Pb were found in the West River watershed, and the highest concentrations of Co, Hg, and As were found in the estuary area. The non-negative properties of the source component spectrum and source contribution rate (obtained by the PMF model), as well as the significant correlation between the measured and PMF predicted concentrations, indicated that the results of the PMF model were relatively reasonable and can meet research needs. The source apportionment results of the PMF model showed that natural sources, agricultural sources, coal combustion, and industrial sources were the four major potential sources for heavy metals in the sampled agricultural soils, contributing 37.0%, 26.7%, 17.6%, and 18.7%, respectively.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:River pollution Controlled terms:Agricultural robots - Agriculture - Coal combustion - Factorization - Fluorescence spectroscopy - Heavy metals - Inductively coupled plasma mass spectrometry - Matrix algebra - Rivers - Screening - Soil pollution - Soil surveys - Soils - Watersheds Uncontrolled terms:Agricultural sources - Atomic fluorescence spectrometry - Background concentration - Heavy metal concentration - Inductively coupled plasma mass spectrometries (ICPMS) - Positive Matrix Factorization - Positive matrix factorization models - Source contributions Classification code:444.1 Surface Water - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 531 Metallurgy and Metallography - 741.3 Optical Devices and Systems - 801 Chemistry - 802.3 Chemical Operations - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics - 921.1 Algebra Numerical data indexing:Percentage 1.76e+01%, Percentage 1.87e+01%, Percentage 2.67e+01%, Percentage 3.70e+01% DOI:10.13227/j.hjkx.201907156 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658136 Title:Distribution Characteristics and Influencing Factors of Chromophoric Dissolved Organic Matter in a Northern-Side River of the Qinling Mountains in Summer Title of translation:秦岭北麓河流夏季有色溶解有机物分布特征及影响因素 Authors:Lin, Zi-Shen (1, 2); Huang, Ting-Lin (1, 2); Yang, Shang-Ye (1, 2); Wen, Cheng-Cheng (1, 2); Li, Yan-Qing (1, 2); Zhou, Shi-Lei (3); Song, Xuan-She (4) Author affiliation:(1) Key Laboratory of Northwest Water Resource, Environment and Ecology, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China; (4) 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:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2210-2220 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:UV-visible absorption spectroscopy, fluorescence spectroscopy, and parallel factor analysis were used to analyze the composition of chromophoric dissolved organic matter (CDOM) in the waters of the Wangchuan River in summer, and the source of this CDOM was explored. The redundant analysis method and Pearson correlation were used to analyze the correlation between optical parameters and water quality parameters. The results showed that the CDOM of the Wangchuan River is composed of the tryptophan-like component C1 (245, 300/335 nm), the short-wave humus component C2 (240, 320-340/405 nm), and the long-wave humus component C3 (270, 350-370/470 nm), in which components C1 and C2 have some homology (r=0.859, P<0.001). CDOM absorption coefficient α(355) indicates that the CDOM concentration in the water body of the Wangchuan River is at a low level, and the correlation between α(355) and DOC concentration is significant (r=0.850, P<0.001), which is conducive to the establishment of a DOC inversion model. Water fluorescence index FI (2.36±0.20), HIX (3.66±2.47), BIX (1.56±0.82), and freshness index (β:α) (1.33±0.62), and the spectral slope ratio SR (0.76±0.25) indicate that the CDOM of the Wangchuan River has strong self-generated characteristics, weak humification characteristics, and more new CDOM. Redundancy analysis showed that the humic components (C2, C3) are affected by algae metabolism and microbial action, while tryptophan-like components (C1) are related to land-based input, and negatively correlated with dissolved total nitrogen. The humic components C2 and C3 are positively correlated with total phosphorus, dissolved total phosphorus, and dissolved organic carbon. This paper clarifies the characteristics and influencing factors of CDOM in the Qinling valley, and provides a theoretical basis for water body management in the Qinling valley.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Quality control Controlled terms:Absorption spectroscopy - Amino acids - Biogeochemistry - Dissolution - Fluorescence - Fluorescence spectroscopy - Landforms - Optical correlation - Organic carbon - Phosphorus - Rivers - Soils - Water absorption - Water quality Uncontrolled terms:Absorption co-efficient - Chromophoric dissolved organic matter - Dissolved organic carbon - Distribution characteristics - Fluorescence indices - Parallel factor analysis - UV-visible absorption spectroscopy - Water quality parameters Classification code:445.2 Water Analysis - 481.1 Geology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.201909113 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371313 Title:Characteristics of Condensable Particulate Matter in Ultra-low Emission Coal-Fired Power Plants Title of translation:典型超低排放燃煤电厂可凝结颗粒物特征和成因 Authors:Deng, Jian-Guo (1); Wang, Gang (1); Zhang, Ying (1); Li, Yan-Jing (1); Duan, Lei (1, 2); Jiang, Jing-Kun (1, 2) Author affiliation:(1) School of Environment, Tsinghua University, Beijing; 100084, China; (2) State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing; 100084, China Corresponding author:Jiang, Jing-Kun(jiangjk@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1589-1593 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The condensable particle matter (CPM) from coal-fired power plants has attracted significant attention for its potential influence on air quality. The knowledge of CPM emissions from coal-fired power plants is limited. In this study, CPM was collected at the inlet and outlet of wet flue gas desulfurization (WFGD) and the outlet of wet electrostatic precipitator (WESP) using in-direct dilution method. Both mass concentration and water-soluble ions of CPM were analyzed after sampling. The gas precursors were measured at the same time. We showed that gas precursors such as HCl, HNO3, SO3, and NH3 significantly contributed to CPM from coal-fired power plants. As the temperature of flue gas decreased, these gas precursors were observed to form CPM. The major components of CPM were water-soluble ions such as SO4^2-, Cl^-, NO3^-, and NH4⁺. WFGD and WESP could reduce the CPM gas precursors. Therefore, CPM concentrations after WFGD and WESP of the five tested coal-fired power plants were reduced by 27% and 45%, respectively. In addition, the condensation of SO3 increased SO4^2- concentration but reduced Cl^- and NO3^- contents. Finally, SO4^2- was found to be the major water-soluble ion of CPM.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Fossil fuel power plants Controlled terms:Air quality - Ammonia - Chlorine compounds - Coal - Coal fueled furnaces - Desulfurization - Electrostatic precipitators - Electrostatics - Flue gases - Flues - Gases - Ions - Mining - Particles (particulate matter) - Particulate emissions - Precipitation (chemical) Uncontrolled terms:Coal-fired power plant - Condensable particulate matters - Dilution method - Mass concentration - Particle matter - Water-soluble ions - Wet electrostatic precipitators - Wet flue gas desulfurization Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 502.1 Mine and Quarry Operations - 524 Solid Fuels - 701.1 Electricity: Basic Concepts and Phenomena - 704.2 Electric Equipment - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 2.70e+01%, Percentage 4.50e+01% DOI:10.13227/j.hjkx.201910091 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070881 Title:Bacterial Diversity and Community Structure Antibiotic-resistant Bacteria in Bioaerosol of Animal Farms Title of translation:4种动物养殖场空气中抗生素耐药菌的生物多样性及群落结构 Authors:Sha, Yun-Fei (1, 2); Sun, Xing-Bin (1); Xin, Wen-Peng (3); Gao, Hao-Ze (2); Cheng, Shou-Tao (2); Gao, Min (2); Wang, Xu-Ming (2) Author affiliation:(1) College 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) Beijing CP Egg Industry Co., Ltd., Beijing; 101206, China Corresponding author:Sun, Xing-Bin(sunxingbin1025@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:656-664 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Confined animal feeding operations generate high concentrations of airborne antibiotic-resistant bacteria, including pathogenic strains that may pose a health risk to both animals and farm workers and pollute the local air environment. In this study, tetracycline and erythromycin-resistant bacteria were used as examples to study the biodiversity and community structure of airborne antibiotic-resistant bacteria in animal farms. The Anderson sampler was used to collect bioaerosols samples from the inside environment and outside atmospheric environments. A comparative analysis of biological differences of antibiotic-resistant bacteria was conducted on fine and coarse particles, bioaerosol samples inside the house, fecal samples, and inside and outside bioaerosol samples based on the result of the Illumina MiSeq sequencing. The key genus that drives the above differences was also studied. Results showed that the biodiversity of airborne erythromycin-resistant bacteria was higher than that of airborne tetracycline-resistant bacteria, and the biodiversity of bioaerosol samples in the house was higher than that in fecal samples. There were no significant differences in the biodiversity and community structure of airborne antibiotic-resistant bacteria between fine and coarse particles. Actinobacteria is one of the key bacteria responsible for the differences between erythromycin-resistant bacteria and other bacterial populations. Staphylococcus is one of the key genera of tetracycline-resistant flora that is distinguished from erythromycin resistance and all bacterial flora. The results of the community structure showed that there was no significant difference in the dominant flora and the community structure of tetracycline and erythromycin-resistant bacteria. The community structure of feces and bioaerosol samples is different at the genus level, and the dominant bacteria are likewise different. The results of this study provide basic data for the accurate assessment of the current status of antibiotic-resistant bacteria in animal farms and their ecological risks.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Bacteria Controlled terms:Aerosols - Animals - Antibiotics - Biodiversity - Digital storage - Health risks - Risk assessment Uncontrolled terms:Animal feeding operations - Antibiotic-resistant bacteria - Atmospheric environment - Bacterial population - Bioaerosols - Comparative analysis - Erythromycin resistance - Resistant bacteria Classification code:454 Environmental Engineering - 461.6 Medicine and Pharmacology - 461.7 Health Care - 722.1 Data Storage, Equipment and Techniques - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201907049 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070611 Title:Pollution Characteristics and Ozone Formation Potential of Ambient Volatile Organic Compounds(VOCs)in Summer and Autumn in Different Functional Zones of Lianyungang, China Title of translation:连云港不同功能区挥发性有机物污染特征及臭氧生成潜势 Authors:Qiao, Yue-Zhen (1, 2); Chen, Feng (1); Li, Hui-Peng (1); Zhao, Qiu-Yue (1) Author affiliation:(1) Jiangsu Province Academy of Environmental Science, Nanjing; 210036, China; (2) Jiangsu Key Laboratory of Environmental Engineering, Nanjing; 210019, China Corresponding author:Zhao, Qiu-Yue(qiuyue.zhao@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:630-637 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Atmospheric volatile organic compounds (VOCs) were collected from different functional zones of Lianyungang during the summer and autumn of 2018. One-hundred-seven VOCs species were measured by cryogenic pre-concentration and gas chromatography-mass spectrometry (GC/MS). The ozone generation potential (OFP) of VOCs was estimated by maximum incremental reactivity (MIR). Results showed that the average volume fraction of VOCs was (22.1±13.1)×10^-9. Alkanes and alkenes from C2-C4 as well as acetone and ethyl acetate were the predominant species, accounting for 59.8%-75.8% of TVOCs. The mean volume fraction in the industrial zone was the largest [(28.4±13.5)×10^-9], followed by the scenic zone [(21.7±4.4)×10^-9] and the traffic and residential mixed zone [(20.8±7.2)×10^-9]. The concentration of VOCs in autumn was significantly higher than that in summer. The industrial zone was the site with the highest volume fraction in autumn (35.4×10^-9), while the scenic zone had the highest volume fraction in summer (21.5×10^-9). Alkane, sulfur, or oxygen containing compounds and halogenated hydrocarbons were the predominant components of VOCs, accounting for 35.3%, 26.9%, and 15.6% of the total amount, respectively. Due to industrial emissions, the content of sulfur or oxygen containing compounds in the industrial zone was significantly higher than that in scenic zone and the traffic and residential mixed zone. The average ratio of T/B (toluene/benzene) indicated that vehicle and solvent use were the main sources of VOCs in the urban area. The highest OFP was found in the industrial zone, followed by the traffic and residential mixed zone and the scenic zone. Alkenes and aromatics were the largest contributors to OFP.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Gas chromatography Controlled terms:Acetone - Housing - Industrial emissions - Mass spectrometry - Olefins - Organic solvents - Ozone - Paraffins - Sulfur compounds - Volatile organic compounds - Volume fraction Uncontrolled terms:Gas chromatography-mass spectrometry - Halogenated hydrocarbons - Lianyungang - Maximum incremental reactivities - Oxygen-containing compounds - Ozone formation potentials - Pre-concentration - Species composition Classification code:403.1 Urban Planning and Development - 451.1 Air Pollution Sources - 641.1 Thermodynamics - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.56e+01%, Percentage 2.69e+01%, Percentage 3.53e+01%, Percentage 5.98e+01% to 7.58e+01% DOI:10.13227/j.hjkx.201908186 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070270 Title:Microbial Community Succession in Industrial Composting with Livestock Manure and Peach Branches and Relations with Environmental Factors Title of translation:畜禽粪便和桃树枝工业化堆肥过程中微生物群演替及其与环境因子的关系 Authors:Cai, Han-Bing (1, 2); Feng, Wen-Wen (1, 2); Dong, Yong-Hua (3); Ma, Zhong-Liang (1); Cao, Hui-Jin (1, 2); Sun, Jun-Song (2); Zhang, Bao-Guo (2) Author affiliation:(1) School of Life Sciences, Shanghai University, Shanghai; 200444, China; (2) Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai; 201210, China; (3) Shanghai Agricultural Product Quality and Safety Center, Shanghai; 200335, China Corresponding author:Zhang, Bao-Guo(zhangbg@sari.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:997-1004 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study sets out to understand the evolution of the microbial community structure in industrial composting with livestock manure and peach branches. Pig manure, peach branches, and decomposed organic fertilizer were used as materials for composting. Changes in physical and chemical indicators and the evolution in the structure of the compost microbial community, determined by high-throughput sequencing, were analyzed. The results of physical and chemical parameters show that the pile reached the high-temperature stage on day 2, and the thermophilic period lasted for 30 days. The changes in total carbon were volatile, and there was an overall decline in the amount of TOC in the whole process of composting; The final content of TN was 20.58 g•kg^-1, which was 5.90% lower compared to the initial compost. Alpha analysis indicated that a different microbial community diversity existed at different times during aerobic composting periods. At the bacterial phyla level, Firmicutes and Actinobacteria were the dominant phyla, and the proportion of relative abundance were 79.31%-95.09% and 2.98%-19.70%, respectively, in the entire compost. The relative abundance of Firmicutes and Actinobacteria were 87.36% and 9.66%, respectively, and their respective relative abundances were 79.38% and 19.70% at the end of composting. At the bacterial genus level, the dominant group changed from Clostridium_sensu_stricto_1, Terrisporobacter, and Bacillus to norank_ f_Bacillaceae, Bacillus, Oceanbacillus, and Pseudogracilibacillus; Regarding the fungus phyla, the Ascomycota was the dominant phylum. For the fungus genus, the relative abundance of norank_c_Sordariomycetes gradually increased during composting, and finally was predominant group. The redundancy analysis (RDA) showed that the correlation rank between environmental factors and microbial community structure was: pH>NH4⁺-N>T>TOC>TN, where pH had the greatest impact on the microbial community composition. norank_c_Sordariomycetes, norank_o_Sordariales, and norank_c_Agaricomycetes may be related to the volatilization of ammonium nitrogen.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Fertilizers Controlled terms:Bacteriology - Chemical analysis - Composting - Fruits - Indicators (chemical) - Mammals - Manures - Microorganisms - Piles - Redundancy Uncontrolled terms:High-throughput sequencing - Livestock manure - Microbial community composition - Microbial community structures - Microbial diversity - Peach branch - Physical and chemical parameters - Redundancy analysis Classification code:408.2 Structural Members and Shapes - 461.9 Biology - 801 Chemistry - 804 Chemical Products Generally - 821.4 Agricultural Products - 821.5 Agricultural Wastes Numerical data indexing:Age 8.22e-02yr, Percentage 1.97e+01%, Percentage 2.98e+00% to 1.97e+01%, Percentage 5.90e+00%, Percentage 7.93e+01% to 9.51e+01%, Percentage 7.94e+01%, Percentage 8.74e+01%, Percentage 9.66e+00% DOI:10.13227/j.hjkx.201907153 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371293 Title:Changes in Epilithic Algae Community and Its Relationship with Environmental Factors in the Meixi River, a Tributary of the Three Gorges Reservoir Title of translation:三峡库区支流梅溪河附石藻类群落变化及其与环境因子的关系 Authors:Mi, Wen-Mei (1); Shi, Jun-Qiong (1); Yang, Yan-Jun (1); Yang, Song-Qi (1); He, Shu-Han (1); Wu, Zhong-Xing (1) Author affiliation:(1) Key Laboratory of Eco-environments 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:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1636-1647 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the relationship between the community of epilithic algae and environmental factors in tributaries of the Three Gorges Reservoir region, the epilithic algae and related environment factors were investigated from 26 sampling sites in Meixi River, a tributary of the Three Gorges Reservoir region, during flood period (August 2016), drought period (November 2016), and normal water period (March 2017). Results showed that 106 species (including varieties) belonging to 47 genera and 5 families were identified from 26 sampling sites during the three periods. Among these, 73 species belonged to 38 genera and 5 families in the flood period, 67 species belonged to 36 genera and 4 families in the drought period, and 63 species belonged to 33 genera and 4 families in the normal water period. Nineteen, 17, and 18 dominant species were identified during the flood period, drought period, and normal water period, respectively. The main dominant species were Achnanthes sp., Aphanizomenon sp., and Phormidium sp. in the flood period; Achnanthes sp., Gomphonema sp., and Microcystis sp. in the drought period; and Gomphonema sp., Nitzschia sp., and Chroococcus sp. in the normal water period. Moreover, species such as Cocconeis placentula, Achnanthes sp., Gomphonema subclavatum, G. parvulum, Navicula parva, and G. constrictum were determined to be the common dominant species during the three periods. Redundancy analysis revealed that the changes in the relative abundance of dominant species in the backwater sections were significantly related to the electrical conductivity, dissolved oxygen, pH, total phosphorus, and total nitrogen, and the relative abundance of dominant species in the natural sections was mainly related to the electrical conductivity, pH, total phosphorus, temperature, and velocity. Moreover, a different relationship with the environmental factors was determined among the three periods. However, a negative correlation between total phosphorus and the relative abundances in G. parvulum, G. constrictum, and Achnanthes sp. and a positive correlation between pH and the relative abundances in G. parvulum, G. constrictum, and Achnanthes sp. were found during the three periods. These results indicated that the differences in the hydrological regime and environmental factors in the Three Gorges Reservoir played an important role on the composition of epilithic algae community and led to a significant change in the community structure of epilithic algae.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Reservoirs (water) Controlled terms:Algae - Biochemical oxygen demand - Dissolved oxygen - Drought - Electric conductivity - Floods - Phosphorus - Rivers Uncontrolled terms:Community composition - Electrical conductivity - Environmental factors - Epilithic algae - Negative correlation - Positive correlations - Three gorges reservoir - Three Gorges Reservoir region Classification code:441.2 Reservoirs - 444 Water Resources - 701.1 Electricity: Basic Concepts and Phenomena - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201909253 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371219 Title:Adsorption Properties of Sludge-hydrochar for Methylene Blue Title of translation:污泥水热炭对亚甲基蓝的吸附特性 Authors:Chen, Li-Yuan (1); Li, Da-Peng (1); Zhu, Wen-Juan (1); Xu, Chu-Tian (1); Ding, Yu-Qin (1); Huang, Yong (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Li, Da-Peng(ustsldp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1761-1769 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A low-cost and efficient adsorbent, based on sewage sludge, was prepared by hydrothermal carbonization. The sludge-hydrochar was prepared at different temperatures (160, 190, 220, and 250℃) and different reaction times (1, 4, 8, and 16 h). It was applied to the adsorption of methylene blue (MB) in water. This study analyzed the structure and physicochemical properties of hydrochar by BET, FT-IR, and zero charge points. In addition, we investigated the optimum hydrothermal conditions for the preparation of adsorbents and adsorption properties for MB by experiments. Studies have shown that 190℃ and 4 h were the best hydrothermal conditions for the preparation of adsorbent (SS190-4). SS190-4 has the largest specific surface area (11.916 m²•g^-1) and the best removal rate (96.44%) for methylene blue (MB). The adsorption of MB is more favorable when the solution is alkaline. The adsorption conforms to the Langmuir isotherm equation, and the maximum model adsorption capacity for MB is 400 mg•g^-1. When the concentration of hydrochar is 0.5 g•L^-1, it is more economical and reasonable. When there are coexisting ions in the solution, the adsorption capacity of hydrochar to MB is inhibited. The adsorption process of MB by hydrochar conforms to the quasi-secondary kinetic model, which is a spontaneous exothermic reaction.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Adsorption Controlled terms:Adsorbents - Aromatic compounds - Carbonization - Isotherms - Physicochemical properties - Sewage sludge - Thermochemistry Uncontrolled terms:Adsorption capacities - Adsorption process - Adsorption properties - Hydrochar - Hydrothermal carbonization - Hydrothermal conditions - Methylene Blue - Sludge Classification code:452.2 Sewage Treatment - 641.1 Thermodynamics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds Numerical data indexing:Mass_Density 5.00e-01kg/m3 to 2.20e-02kg/m3, Percentage 9.64e+01%, Specific_Surface_Area 1.19e+04m2/kg, Time 1.44e+04s, Time 5.76e+04s DOI:10.13227/j.hjkx.201908198 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861864 Title:Profiles and Risk of Antibiotic Resistance Genes in Domestic Wells in the Maozhou River Basin Title of translation:茅洲河流域民用井中耐药基因的分布特征与健康风险 Authors:Wu, Dai-Ling (1, 2); Zou, Hai-Yan (1, 2); He, Lu-Xi (1, 2); Gao, Fang-Zhou (1, 2); Ying, Guang-Guo (1, 2); He, Liang-Ying (1, 2) Author affiliation:(1) Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety, South China Normal University, Guangzhou; 510006, China; (2) School of Environment, South China Normal University, Guangzhou; 510006, China Corresponding author:He, Liang-Ying(liangying.he@m.scnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3222-3230 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Intensive use of antibiotics promotes the occurrence and development of antibiotic resistance. Antibiotic resistance genes (ARGs) enter water environments from human and animal sources. Groundwater serves as an important water supply, while the profiles and risk of ARGs in groundwater remain unknown. The abundance and profiles of ARGs in 11 domestic wells in the Maozhou River basin of Shenzhen City were analyzed by high-throughput qPCR. The results showed that a total of 141 ARGs and 8 mobile genetic elements (MGEs) were detected, of which the genes corresponding resistance to sulfonamides, multidrugs, and aminoglycosides were the most abundant. In each well, the number of detected ARGs and MGEs ranged from 48 to 89, with an average of 68. When normalized by the abundance of 16S rRNA genes, it was found that each bacterium carried at least one ARG in the groundwater of W7, W8, and W10, while in W11, each bacterium carried at least four ARGs. Clinically relevant ARGs that code for resistance to glycopeptide (blaSHV, blaTEM, blaCTX, and blaOXA-1), β-lactams (vanB and vanC-03), or chloramphenicol (floR) were found in groundwater. In addition, the abundance of sulfonamides, multidrugs, aminoglycosides, β-lactam, and chloramphenicol resistance genes were positively correlated with the abundance of MGEs (P<0.01), suggesting that MGEs may promote the spread of ARGs in groundwater.
© 2020, Science Press. All right reserved. Number of references:61 Main heading:Antibiotics Controlled terms:Amides - Bacteria - Genes - Groundwater - Polymerase chain reaction - RNA - Sulfur compounds - Water supply - Watersheds Uncontrolled terms:Aminoglycosides - Antibiotic resistance - Antibiotic resistance genes - Domestic wells - Genetic elements - High throughput - Resistance genes - Water environments Classification code:444.1 Surface Water - 444.2 Groundwater - 446.1 Water Supply Systems - 461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 801.2 Biochemistry - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201911256 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256322 Title:Ecological Risk Assessment of Tetracycline Antibiotics in Livestock Manure and Vegetable Soil of Chongqing Title of translation:重庆市畜禽粪便及菜田土壤中四环素类抗生素生态风险评价 Authors:Peng, Qiu (1); Wang, Wei-Zhong (1); Xu, Wei-Hong (1) Author affiliation:(1) College of Resources and Environmental Sciences, Southwest University, Chongqing; 400715, China Corresponding author:Xu, Wei-Hong(xuwei_hong@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4757-4766 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The residue of new organic pollutant antibiotics in the environment and their risks to the ecological environment have become important research issues at home and abroad. China is the largest country of antibiotic production and antibiotic use. Tetracycline antibiotics (TCs) have been used in large quantities, and they also have the highest residue in animal manure. Tetracycline antibiotics in animal manure are easily accumulated in the soil, and disturb the soil microbial community; furthermore, they are absorbed by crops and remain in agricultural products, thereby threatening human health and ecological security. At present, the pollution of antibiotics in animal manure and soil of southwest China has not been reported. An investigation and analysis were conducted to evaluate the environmental ecological risks of three agricultural tetracycline antibiotics [oxytetracycline (OTC), tetracycline (TC), and chlortetracycline (CTC)] in livestock manure of large farms and soil of main vegetable base in chongqing. The results showed that the average contents of OTC, TC, CTC, and TCs ∑TCs in pig and chicken manure in 2014 was 13.05, 91.81, 62.48, 167.34 mg•kg^-1, and 4.25, 4.60, 28.55, 37.40 mg•kg^-1, respectively. The average contents of OTC, TC, CTC, and ∑TCs in pig and chicken manure in 2019 were 3.39, 4.82, 5.92, 15.95 mg•kg^-1, and 1.10, 1.35, 4.22, 5.16 mg•kg^-1, respectively. The content of TCs in livestock and poultry manure of Chongqing in 2019 decreased significantly as compared to that in 2014. The ecological risk of TCs in chicken manure was lower than that in pig manure, and the ecological risk of TCs in livestock manure in 2019 was significantly lower than that in 2014. Moreover, the risk quotient was in the order of CTC>OTC>TC. The average contents of OTC, TC, CTC, and ∑TCs in the soil of the main vegetable bases and surrounding areas in Chongqing were 18.92, 39.10, 21.80, and 79.81 μg•kg^-1, respectively. The content of TCs was in the order of vegetable field near the farm>pollution-free vegetable base>common vegetable field. In the vegetable field near the farm, the content of TCs in open vegetable field was generally higher than that in greenhouse field. In contrast, in the pollution-free vegetable base, the content of TCs in the greenhouse field was higher than that in the pen field. The ecological risk quotients (HQ values) of TCs in the vegetable field were lower than 1 under various planting modes. The HQ values of the three TCs were in the order of CTC>OTC>TC. The content of ∑TCs in soil was in the order of leaves>melons>solanoids>legumes. The difference in contents of soil TCs was found in different vegetable fields with different vegetable types, and it may be related to the different vegetable cultivation patterns, type, and amount of livestock manure.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Soil pollution Controlled terms:Agricultural products - Agricultural robots - Antibiotics - Cultivation - Fertilizers - Greenhouses - Mammals - Manures - Organic pollutants - Risk assessment - Soils - Vegetables Uncontrolled terms:Antibiotic production - Ecological environments - Ecological risk assessment - Investigation and analysis - Oxytetracyclines (OTC) - Soil microbial community - Tetracycline antibiotics - Vegetable cultivation Classification code:461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202003229 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008957 Title:Effects of Drip Irrigation Patterns and Biochar Addition on Soil Mineral Nitrogen and Microbial Regulation of Greenhouse Title of translation:滴灌方式和生物质炭对温室土壤矿质态氮及其微生物调控的影响 Authors:Cai, Jiu-Mao (1, 2); Liu, Jie-Yun (1, 2); Qiu, Hu-Sen (1, 3); Lü, Mou-Chao (1, 2); Zhou, Xin-Guo (1, 3) Author affiliation:(1) Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang; 453002, China; (2) Key Laboratory of Efficient Irrigation Engineering Ministry of Agriculture and Rural Affairs, Xinxiang; 453002, China; (3) National Agro-ecological System Observation and Research Station of Shangqiu, Chinese Academy of Agricultural Sciences, Shangqiu; 476000, China Corresponding author:Qiu, Hu-Sen(qiuhusen2008@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3836-3845 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Drip irrigation and biochar amendment could affect the nitrogen form and transformation. Creating a deep understanding of the interacting effects of drip irrigation patterns and biochar on soil mineral nitrogen, as well as the key functional genes and microbial community involved in nitrogen transformation is helpful for improving facility agricultural management, increasing water and nitrogen use efficiency, and reducing the nitrate accumulation and groundwater pollution caused by nitrogen leaching. Four treatments [surface drip irrigation (D), insert drip irrigation (ID, insert depth 15 cm), surface drip irrigation +10 t•hm^-2 of biochar (DB), and insert drip irrigation +10 t•hm^-2 of biochar (IDB)] were conducted in a solar greenhouse, and non-rhizospheric and rhizospheric soils of pepper plants were studied. There was no effect of drip irrigation patterns and biochar on ammonium-nitrogen in the non-rhizospheric and rhizospheric soils. Compared with surface drip irrigation, insert drip irrigation decreased the nitrate-nitrogen concentration in the non-rhizosphere soil (P<0.05), but biochar addition weakened the difference. Biochar addition decreased the nitrate-nitrogen concentration in the rhizosphere soil under the same drip irrigation patterns. In the D treatment, biochar significantly decreased the number of copies of AOA, AOB, and nirK genes in the non-rhizospheric soil, and AOA gene copies in the rhizospheric soil (P<0.05); however, there was an increase in the number of copies of AOB and nirK genes in the rhizospheric soil of the D and ID treatments (P<0.05). Based on the structural equation model (SEM), in the non-rhizospheric and rhizospheric soils, pH and electrical conductivity were the environmental factors with the greatest influence on the ammonium-nitrogen and nitrate concentrations, respectively, and the gene copy number of AOB was the biotic factor with the greatest influence on the nitrate-nitrogen concentration. Based on PICRUSt, the γ-Proteobacteria contributed mostly to ammonia monooxygenase gene (K10945) expression, whereas the α-Proteobacteria, especially the rhizobia members, contributed mostly to nitrite reductase gene (K00368) expression. Biochar addition regulated the bacterial community structure that participated in K10945 gene expression in the non-rhizospheric soil and K00368 gene expression in the rhizospheric soil (P<0.05). Overall, biochar addition contributed more to nitrate-nitrogen and microbial mineral nitrogen-transformation processes in the agricultural soil than did the drip irrigation patterns.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Soil pollution Controlled terms:Agricultural robots - Ammonia - Gene expression - Greenhouses - Groundwater - Groundwater pollution - Irrigation - Minerals - Nitrates - Soils Uncontrolled terms:Agricultural management - Bacterial community structure - Electrical conductivity - Nitrite reductase genes - Nitrogen transformations - Nitrogen-use efficiency - Structural equation modeling - Surface drip irrigations Classification code:444.2 Groundwater - 461.9 Biology - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 804.2 Inorganic Compounds - 821.3 Agricultural Methods - 821.6 Farm Buildings and Other Structures Numerical data indexing:Size 1.50e-01m DOI:10.13227/j.hjkx.201912156 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104880 Title:Transition of Particulate Pollutant in the Parcel-based Catchment of Sponge City Title of translation:海绵城市地块汇水区颗粒污染物的传输 Authors:Li, Jia (1, 2); Xie, Wen-Xia (1); Jiang, Zhi-Hui (1, 2); Shan, Xi-Huan (1, 2); Liao, Yun-Jie (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 Corresponding author:Zhao, Hong-Tao(htzhao@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4113-4123 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Most sponge city constructions in China are carried out in urban parcel-based catchments, and the quality and quantity of surface runoff can be controlled by several low impact development (LID) facilities. However, there are few reports on the generation and control of urban diffuse pollution. In this study, two areas with different hardening rates were compared to analyze the load conditions during the accumulation-wash-off-transport process of particulate pollutants. The results showed that the road surface in the catchment was the main underlying surface that the particulate pollutants contributed to. The road dust accumulation in the medium hardening rate (61.1%) and high hardening rate (73.6%) plots accounted for 88.4% (2.22-12.51 g•m^-2) and 90.1% (4.99-33.43 g•m^-2) of the catchment area unit, respectively. The contribution to the suspended solids (SS) load of runoff was 91.7% (0.97-7.34 g•m^-2) and 90.5% (0.92-18.77 g•m^-2), respectively. The SS load of road runoff accounted for approximately 95.2% and 83.1%, respectively. The pollution load (SS) after treatment by the LID facilities was approximately 24.0% and 40.2% of the surface runoff, respectively. The particle size distribution of road dust during the accumulation and wash-off processes was>150 μm, while that in surface and output runoff was <50 μm. With the increase in the impervious area, the distribution of finer particles (<105 μm) in the process of accumulation and wash-off increased (24.4%, 106.4%), while the distribution of particles <50 μm in road runoff decreased (12.4%). The particle size distribution of the accumulated, washed dust, and the rain runoff on the roof were roughly similar to those on the road. However, compared to the particle size distribution of road dust, in the accumulation and wash-off processes, the coarser particles (>1 000 μm) of the medium hardening rate plot and the particles of size 250-450 μm and <45 μm of the high hardening rate plot increased significantly (>1 000 μm: 58.1%, 108.5%; 250-450 μm: 72.9%, 41.8%; <45 μm: 59.2%, 64.8%). The results revealed the entire distribution process (accumulation-wash-off-transport) of particulate pollutants and the effect of LID facilities on the total SS pollution load of the catchment, which can provide an important reference for the scientific assessment of the project performance of LID installation in urban parcel-based catchments.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Particle size analysis Controlled terms:Air pollution - Catchments - Dust - Hardening - Light transmission - Particle size - Particles (particulate matter) - Pollution control - Quality control - Roads and streets - Runoff - Size distribution - Urban transportation Uncontrolled terms:City construction - Diffuse pollution - Distribution of particles - Distribution process - Low impact development - Project performance - Transport process - Underlying surface Classification code:406.2 Roads and Streets - 432 Highway Transportation - 433 Railroad Transportation - 442.1 Flood Control - 451 Air Pollution - 451.1 Air Pollution Sources - 537.1 Heat Treatment Processes - 741.1 Light/Optics - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Percentage 1.06e+02%, Percentage 1.24e+01%, Percentage 2.40e+01%, Percentage 2.44e+01%, Percentage 4.02e+01%, Percentage 5.81e+01%, Percentage 5.92e+01%, Percentage 6.11e+01%, Percentage 6.48e+01%, Percentage 7.29e+01%, Percentage 7.36e+01%, Percentage 8.31e+01%, Percentage 9.52e+01%, Size 2.50e-04m to 4.50e-04m DOI:10.13227/j.hjkx.202001170 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658154 Title:Distribution Characteristics and Migration Rules of Pollutants in Sediments of Reservoirs with Eucalyptus Plantation, Southern China Title of translation:我国南方桉树人工林区水库沉积物污染物的分布特征及迁移规律 Authors:Zhu, Ya (1); Li, Yi-Ping (1); Luo, Fan (2); Li, Rong-Hui (3); Huang, Lie (3); Cheng, Yi-Xin (1); Jiang, Yu-Feng (4) Author affiliation:(1) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing; 210098, China; (2) Guangdong Provincial Academy of Environmental Science, Guangzhou; 510045, China; (3) Guangxi Institute of Water Resources Research, Nanning; 530023, China; (4) Nanjing Hohai Technology Corporation, Nanjing; 210016, China Corresponding author:Li, Yi-Ping(liyiping@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2247-2256 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The safety of water quantity and quality caused by large-scale blackwater in reservoirs with Eucalyptus plantation is currently a point of great interest. Eucalyptus is largely planted in southern China, especially in Nanning, Guangxi, where more than 90% of the drinking water source reservoirs are surrounded by Eucalyptus, and different degrees of blackwater often occur in many reservoirs. Recent research has demonstrated that reservoir sediments play an important role in the migration and transformation of Fe²⁺, Mn²⁺, S^2-, and dissolved organic carbon (DOC) in the overlying water. It is of great significance to explore the distribution characteristics and migration rules of pollutants in the sediment-water interface to reveal the mechanism of blackwater in reservoirs. Experiments were carried out three times in a typical blackwater reservoir (Tianbao Reservoir) in southern China from July to December 2018. The distribution characteristics and seasonal variations of iron, manganese, sulfide, and organic matter in sediments were analyzed, focusing mainly on the profile distribution and migration direction of Fe²⁺, Mn^2+, S^2-and DOC in pore water during blackwater periods. The results showed that: ① The content of iron and manganese in sediments of reservoirs with Eucalyptus plantation is high, far exceeding the background value of soil content in China. The content of iron, manganese, and total organic carbon (TOC) in the surface sediments increases simultaneously, mainly caused by the input and settlement of the material (litter, decomposed liquids. and soil particles) in the Eucalyptus forest around the reservoir. ② The concentration of Fe²⁺(16.99 mg•L^-1) and the content of DOC (36.80%) in pore water during the blackwater period are significantly higher than those in Taihu Lake during the black bloom (12.15 mg•L^-1, 10.78%). The mean concentrations of Fe²⁺ and Mn²⁺ are more than 300 times higher than that of S^2-, and the reduction conditions in the sediments are dominated by iron and manganese oxides. ③ The diffusion flux of Fe²⁺is 27.4-33.5 mg•(m²•d)^-1, which is 32.6, 4.9, and 30.8 times higher than those of Taihu Lake, Aha Reservoir, and Hongfeng Lake, respectively. This implies strong Fe²⁺ release ability from sediments to the overlying water. As a positive correction exists between Fe²⁺and DOC, the complex reaction between Fe²⁺ and organic matter is one of the most important causes of blackwater in reservoirs with Eucalyptus plantation.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Reservoirs (water) Controlled terms:Biogeochemistry - Iron oxides - Lake pollution - Lakes - Manganese oxide - Manganese removal (water treatment) - Organic carbon - Potable water - Sediments - Sulfur compounds Uncontrolled terms:Dissolved organic carbon - Distribution characteristics - Drinking water sources - Eucalyptus plantations - Profile distributions - Reduction conditions - Sediment water interface - Total Organic Carbon Classification code:441.2 Reservoirs - 444 Water Resources - 445.1 Water Treatment Techniques - 453 Water Pollution - 481.2 Geochemistry - 483 Soil Mechanics and Foundations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.22e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 1.70e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.08e+01%, Percentage 3.68e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.201909255 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517605 Title:Effects of Nitrogen Fertilizer and Straw Returning Methods on N2O Emissions in Wheat-Maize Rotational Soils Title of translation:氮肥和秸秆还田方式对麦玉轮作土壤N2O排放的影响 Authors:Xu, Hong-Wei (1, 2); Li, Na (1, 2); Feng, Yong-Zhong (1, 2); Ren, Guang-Xin (1, 2); Xie, Cheng-Hui (1, 2); Lü, Hong-Fei (1, 2); Ma, Xing-Xia (1, 2); Hao, Jia-Qi (1, 2) Author affiliation:(1) College of Agronomy, Northwest A&F University, Yangling; 712100, China; (2) Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling; 712100, China Corresponding author:Feng, Yong-Zhong(fengyz@nwsuaf.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5668-5676 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the impacts of nitrogen fertilizer and straw returning methods on N2O emissions, a two-factor split-zone design was adopted for experimentation under the winter wheat-summer maize rotation model in the Guanzhong area of Shanxi, China. The main areas of interest were conventional nitrogen (G) and reduced nitrogen (70% G); the sub-areas were straw no return (N), straw return (S), and straw return + biochar (SB); we analyzed their impacts on N2O emissions and crop yield, and the relationships with related impact factors. The results showed that the N2O emissions peaks appeared in the wheat season and maize season treatments within 5-16 days after fertilization, and also appeared after rainfall. The N2O flux was significantly and positively correlated with soil temperature and NH4⁺-N content. Regardless of the wheat season, maize season, or annual total N2O emissions, the 70% GSB treatment was the lowest and the GS treatment was the highest. At the same level of nitrogen application, S treatment increased N2O emissions, SB treatment could reduce N2O emissions, both S and SB treatments could significantly increase crop yields, and SB production increased more; 70%G-level annual N2O emissions, when compared with the G level, had been reduced by 40% to 48%, while the yield has not decreased significantly. Through comprehensive consideration, a reduction of nitrogen by 30% was achieved through the combination of straw + biochar on the basis of conventional nitrogen application, while ensuring high crop yields and the best N2O emissions reduction.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Nitrogen fertilizers Controlled terms:Crops - Emission control Uncontrolled terms:Emissions reduction - Impact factor - Reduced nitrogen - Shanxi , China - Soil temperature - Summer maize - Winter wheat - Zone design Classification code:451.2 Air Pollution Control - 804 Chemical Products Generally - 821.4 Agricultural Products Numerical data indexing:Age 1.37e-02yr to 4.38e-02yr, Percentage 3.00e+01%, Percentage 4.00e+01% to 4.80e+01%, Percentage 7.00e+01% DOI:10.13227/j.hjkx.202005151 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795599 Title:Interference of Dead Cell DNA on the Analysis of Antibiotic Resistance Genes and Microbial Community in Anaerobic Digestion Sludge Title of translation:死菌DNA对厌氧消化污泥中抗生素抗性基因及微生物群落分析的干扰 Authors:Su, Yu-Ao (1); Liu, Hong-Bo (1, 2, 3); Mao, Qiu-Yan (1); Zhang, Hui-Min (1); Zhang, Yan (1, 2, 3); Liu, He (1, 2, 3) Author affiliation:(1) School of Environment and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi; 214122, China; (3) Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215011, China Corresponding author:Zhang, Yan(yanzhang@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2812-2821 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the potential interference of dead bacteria DNA on the analysis of antibiotic resistance genes (ARGs) and microbial communities in anaerobic digestion sludge, three different types of anaerobic digestion sludge were treated with propidium monoazide (PMA) in this study, and the results of subsequent ARGs and microbial community analysis with the interference of dead cell DNA blocked by PMA was compared to that without PMA treatment. It was found that after PMA treatment, the absolute abundance of the ARGs in the anaerobic digestion sludge from self-anaerobic digestion system of excess sludge and from high solid sludge anaerobic digestion system decreased by 41%-86%, and 74%-98%, respectively. ARGs abundance in the sludge from the anaerobic digestion system with sludge hydrolyzate as a substrate and anaerobic granular sludge as inoculum after 15 days of digestion considerably decreased with PMA treatment. However, its ARGs abundance still declined by up to 34%. PMA treatment influenced the analysis of microbial community of the three types of anaerobic digestion sludge to different degrees, in which the influence was the highest on the community structure analysis of the sludge from high solid anaerobic digestion system. The results of the correlation analysis between the ARGs abundance and the microbial community composition were completely different in the case with PMA treatment and without PMA treatment. This study proved the potential interference of dead cell DNA on the analysis of ARGs and microbial community in anaerobic digestion sludge. PMA pretreatment could achieve a more accurate analysis of the microbial community and ARGs characteristics in anaerobic digestion sludge.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Anaerobic digestion Controlled terms:Antibiotics - Digestive system - DNA - Genes - Microorganisms - Sludge digestion Uncontrolled terms:Anaerobic granular sludge - Antibiotic resistance genes - Community structure analysis - Correlation analysis - Microbial communities - Microbial community analysis - Microbial community composition - Potential interferences Classification code:452.2 Sewage Treatment - 461 Bioengineering and Biology Numerical data indexing:Age 4.11e-02yr, Percentage 3.40e+01%, Percentage 4.10e+01% to 8.60e+01%, Percentage 7.40e+01% to 9.80e+01% DOI:10.13227/j.hjkx.201911092 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517458 Title:Spatial Distribution Characteristics and Source Apportionment of Soil PAHs in Shizuishan City Based on GIS and PMF Model Title of translation:基于GIS和PMF模型的石嘴山市土壤多环芳烃空间分布及来源解析 Authors:Xia, Zi-Shu (1, 2); Wang, Yu-Yu (1, 2); Zhong, Yan-Xia (1); Bai, Yi-Ru (1, 2); Wang, You-Qi (1, 2); Yang, Fan (1, 2); Li, Ming-Ji (1) Author affiliation:(1) College of Resources and Environmental Science, Ningxia University, Yinchuan; 750021, China; (2) China-Arab Joint International Research Laboratory for Featured Resources and Environmental Governance in Arid Regions, Yinchuan; 750021, China Corresponding author:Wang, You-Qi(wyq0563@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5656-5667 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the acceleration of urbanization and industrialization, the content and pollution of polycyclic aromatic hydrocarbons (PAHs) in urban soils have been sources of widespread concern. Taking Shizuishan City as an example, the spatial distribution characteristics of PAHs in 156 surface soil samples (0-20 cm) from eight urban functional areas were analyzed. Single factor and Nemero composite indices, as well as a lifetime cancer risk increment model were used to evaluate PAHs pollution in soils. The sources of PAHs were analyzed using the positive matrix factorization (PMF) model. The results showed that the mean value of PAHs in the surface soil of Shizuishan City was 489.82 ng•g^-1 and the coefficient of variation of 15 PAHs except for Pyr were more than 100%, indicating strong variation. The PAH contents of urban surface soils in different functional areas showed the following: traffic area (1 217.61 ng•g^-1)>industrial area (809.58 ng•g^-1)>park (273.66 ng•g^-1)>cultural and educational area (268.18 ng•g^-1)>commercial area (240.05 ng•g^-1)>agricultural area (226.81 ng•g^-1)>medical area (211.90 ng•g^-1)>residential area (183.49 ng•g^-1). The Nemero composite index showed that 82.58% of the samples had no pollution, and the proportion of slight, mild, and moderate pollution were 6.45%, 4.52%, and 0.65%, respectively. Only 5.8% of the samples had serious pollution. The results of health risk assessment showed that skin contact and ingestion were the main routes of PAH exposure in soil, and the health risk was acceptable. Source analysis showed that the main sources of PAHs in Shizuishan City were traffic emissions, coal combustion, mixed biomass/heavy oil combustion, and oil sources, with contribution rates of 10.5%, 36.6%, 50.3%, and 2.6% respectively, and most of the high values were distributed in industrial or coal production areas. These results could provide reference for the study of soil pollution in industrial cities, and play an important role in preventing soil pollution, ensuring the environmental quality of the soil and human health and safety.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Soil surveys Controlled terms:Accident prevention - Agricultural robots - Coal combustion - Coal industry - Factorization - Health - Health risks - Industrial emissions - Polycyclic aromatic hydrocarbons - Risk assessment - Soil pollution - Soils - Spatial distribution Uncontrolled terms:Agricultural areas - Coefficient of variation - Distribution characteristics - Environmental quality - Polycyclic aromatic hydrocarbons (PAHS) - Positive matrix factorization models - Source apportionment - Traffic emissions Classification code:451.1 Air Pollution Sources - 461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 1.00e+02%, Percentage 1.05e+01%, Percentage 2.60e+00%, Percentage 3.66e+01%, Percentage 4.52e+00%, Percentage 5.03e+01%, Percentage 5.80e+00%, Percentage 6.45e+00%, Percentage 6.50e-01%, Percentage 8.26e+01%, Size 0.00e+00m to 2.00e-01m DOI:10.13227/j.hjkx.202005066 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070544 Title:Temporal Evolution and Main Influencing Factors of Black Carbon Aerosol in Nanjing Title of translation:南京市黑碳气溶胶时间演变特征及其主要影响因素 Authors:Yang, Xiao-Min (1); Shi, Shuang-Shuang (1); Zhang, Chen (1); Wang, Hong-Lei (1, 2); Wang, Zhen-Bin (1); Zhu, Bin (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China Corresponding author:Wang, Hong-Lei(hongleiwang@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:620-629 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Temporal evolution of black carbon (BC) in Nanjing was studied along with its main influencing factors. The multi-wavelength aethalometer (AE-33) was used to select the typical month of each season to observe BC mass concentration, combined with atmospheric pollutant data, meteorological elements, and boundary layer detection data. Seasonal, daily, weekly trends, and source characteristics of BC were analyzed. The results showed that the BC concentration in Nanjing had obvious seasonal changes, which were higher in spring and winter, in the decreasing order: spring [(3 351±919) ng•m^-3]>winter [(3 234±2 102) ng•m^-3]>in autumn [(3 064±967) ng•m^-3]>summer [(2 632±1 705) ng•m^-3]. The diurnal changes in BC during the four seasons are bimodal, with peaks at 06: 00-08: 00 and 21: 00-23: 00.The morning and evening peak distribution characteristics of BC in different seasons are different. The peak concentration of BC was highest in the early morning peak spring and the highest in the late peak winter. The morning peak timing of winter is 2 h behind other seasons, while the summer peak timing is 2 h ahead of other seasons. The effect of the wind speed on the seasonal distribution of BC diurnal variation is significantly larger than that on RH. The mechanism of the influence of the inversion layer on the concentration of atmospheric pollutants is complicated. The effects of height, thickness, and temperature of the inversion layer on the pollutants are different in different seasons. Weekly BC effects vary seasonally. The effect of RH and wind speed on the weekly BC effect is small, and the difference in the inversion layer is the main reason behind it. Liquid fuel combustion in Nanjing has a greater contribution to BC, whereas solid combustion contributes by a lesser extent.
© 2020, Science Press. All right reserved. Number of references:51 Main heading:Atmospheric boundary layer Controlled terms:Aerosols - Air pollution - Carbon - Combustion - Fog - Fuels - Inversion layers - Springs (components) - Wind Uncontrolled terms:Black carbon aerosol - Boundary layer structure - Meteorological elements - Source apportionment - Time variations Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 601.2 Machine Components - 804 Chemical Products Generally - 931 Classical Physics; Quantum Theory; Relativity - 932 High Energy Physics; Nuclear Physics; Plasma Physics Numerical data indexing:Time 7.20e+03s DOI:10.13227/j.hjkx.201905245 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256321 Title:Heavy Metal Contamination and Health Risk Assessment of Corn Grains from a Pb-Zn Mining Area Title of translation:铅锌矿区玉米中重金属污染特征及健康风险评价 Authors:Zhou, Yan (1, 2); Wan, Jin-Zhong (1, 2); Li, Qun (1, 2); Huang, Jian-Bo (1, 2); Zhang, Sheng-Tian (1, 2); Long, Tao (1, 2); Deng, Shao-Po (1, 2) Author affiliation:(1) Nanjing Institute of Environmental Science, Ministry of Ecology and Environment, Nanjing; 210042, China; (2) State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing; 210042, China Corresponding author:Deng, Shao-Po(dsp@nies.org) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4733-4739 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A total of 92 corn grain samples, around the Pb-Zn mining area in Southwest China, were collected to evaluate the contamination and health risk of heavy metals. Heavy metals including Pb, Zn, Cd, Cr, and Ni in samples were analyzed. A single factor pollution index and comprehensive pollution index were calculated to assess the quality of corn grains. The potential health risks to adults and children due to the intake of these heavy metals through consumption of crops were evaluated using the health risk index. The results showed that the average contents of Pb, Zn, Cd, Cr, and Ni in corn grains were 0.30, 23.75, 0.21, 1.33, and 1.15 mg•kg^-1, respectively, Among the metals, the content of Zn, Pb, Cd, Cr, and Ni exceeded the national food hygiene standards. The Nemero index of Pb, Cd, Cr, and Ni ranged from 4.32 to 9.07, indicating an extremely high level, whereas the contamination of Zn reached an alarming level. The assessment results of the comprehensive health risk index for the corn grains indicated that the contamination of heavy metals poses health risks to adults and children by food ingestion; moreover, the children were more sensitive to various heavy metals than the adults. Principle component analysis revealed that the first main component dominated the sources of Pb, Cd, Cr, and Ni, while the second main component, Zn, might have originated from sources different from the other heavy metals. Positive correlations were not observed between the heavy metals in corns and soils.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Chemical contamination Controlled terms:Binary alloys - Contamination - Food safety - Grain (agricultural product) - Health - Health risks - Heavy metals - Lead alloys - Nickel - Pollution - Risk assessment - Zinc alloys Uncontrolled terms:Heavy metal contamination - Mining areas - National Foods - Pollution index - Positive correlations - Potential health risks - Principle component analysis - Southwest China Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 531 Metallurgy and Metallography - 546.1 Lead and Alloys - 546.3 Zinc and Alloys - 548.1 Nickel - 821.4 Agricultural Products - 822.3 Food Products - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202004139 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106397 Title:Discussion on Key Issues of Geochemical Monitoring of Soil Heavy Metal in Xiong'an New District Title of translation:雄安新区土壤重金属地球化学监测关键问题探讨 Authors:Guo, Zhi-Juan (1, 2, 3); Zhou, Ya-Long (1, 2, 3); Yang, Zheng (1, 2, 3); Zhao, Chuan-Dong (1, 2, 3); Cheng, Hang-Xin (1, 2, 3); Kong, Mu (1, 2, 3); Peng, Min (1, 2, 3) Author affiliation:(1) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding author:Zhou, Ya-Long(zhouyalong@igge.cnemailchenghangnxin@igge.cn)Cheng, Hang-Xin(chenghangnxin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4169-4179 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To build a soil environmental quality monitoring network and collect the systematic soil geochemical data of heavy metals before and after the construction of Xiong'an New District(XND), long-term variations in soil heavy metal levels during the XND construction were monitored based on the land quality geochemical survey monitoring data and the geochemical distribution of heavy metals. Parameters such as sampling density, sampling quantity, and sampling period were estimated to construct the geochemical monitoring network, which provides a reference for the future long-term monitoring of soil heavy metal geochemistry in XND. The results indicate that variations in the amount of heavy metals As, Cd, Cu, Hg, and Pb are greater than 36%, while the nugget coefficients of Cd, Cu, and Pb are greater than 75% because of the superposition of manmade sources on the high natural background levels. At the 95% and 90% confidence levels, while the allowable error Δ of the sample mean value is 5%, 10%, and 15% and heavy metals as As, Cd, Cu, Hg,Ni, Pb and Zn is monitored in soil environmental quality monitoring network, the proper numbers in the study area are 1 077, 270, 120 and 767, 192, 86, respectively. The minimum detectable change(MDC)of each heavy metal species is between 0.002 5 and 2.54 mg•kg^-1. Soil heavy metal monitoring requires different revisit intervals under different annual change rates, but in the study area, revisit intervals of soil monitoring are approximately two years under the current conditions of constant annual change rates.
© 2020, Science Press. All right reserved. Number of references:51 Main heading:Heavy metals Controlled terms:Geochemical surveys - Geochemistry - Monitoring - Soils Uncontrolled terms:Confidence levels - Environmental quality - Geochemical data - Geochemical monitoring - Long term monitoring - Natural background levels - Sampling densities - Soil heavy metals Classification code:481.1 Geology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography Numerical data indexing:Percentage 1.00e+01%, Percentage 1.50e+01%, Percentage 3.60e+01%, Percentage 5.00e+00%, Percentage 7.50e+01%, Percentage 9.00e+01%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202002134 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008858 Title:Mechanism and Influencing Factors of Increasing Soil Temperature by in-situ Electrical Resistance Heating Title of translation:原位电阻热脱附土壤升温机制及影响因素 Authors:Ge, Song (1); Meng, Xian-Rong (2); Xu, Wei (2); Shi, Wei-Lin (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Suzhou Environmental Science Research Institute, Suzhou; 215007, China Corresponding author:Shi, Wei-Lin(weilin-shi@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3822-3828 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The mechanism and influencing factors of an in-situ thermal remediation using electrical resistance heating were investigated. The effects of electrical current, heating method, rehydration, and negative pressure on soil heating and energy consumption were studied using in-situ electrical resistance heating equipment. The results showed that there were two main mechanisms for soil heating. Firstly, electric energy was converted into heat energy, whereby direct heating of the soil by electricity increased the soil temperature. This mechanism mainly existed in the soil between two electrodes. The second was heat conduction, whereby the soil temperature between the electrodes was the highest, and the heat gradually transferred from the high-temperature soil to the low-temperature soil, such that the temperature of the soil far away from the electrode connection gradually increased. The heating current affected the rate of increase of the soil temperature. The higher the current was, the faster the soil temperature rate of increase was and the lower the unit energy consumption was. Compared with continuous heating, intermittent heating had a slower heating rate and required a longer time to reach the same temperature. However, the energy consumption per unit was low and only 45.2% of that of continuous heating. During the heating process, water should be continuously added to the soil around the electrode to maintain a high current and continuous heating. The negative pressure of extraction was large, the soil heat loss was large, and the unit energy consumption was high. In actual projects, appropriate technological conditions should be selected according to time, cost, and the removal rate as a means of improving the efficiency of the in-situ resistance thermal desorption remediation of contaminated soil, reducing energy consumption, and shortening the time limit.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Soil pollution control Controlled terms:Electric resistance - Electrodes - Energy efficiency - Energy utilization - Heat conduction - Heating - Remediation - Soil pollution - Soils - Temperature Uncontrolled terms:Electrical current - Electrical resistance heating - Electrode connections - Intermittent heating - Negative pressures - Reducing energy consumption - Technological conditions - Thermal remediation Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 525.2 Energy Conservation - 525.3 Energy Utilization - 641.1 Thermodynamics - 641.2 Heat Transfer - 701.1 Electricity: Basic Concepts and Phenomena Numerical data indexing:Percentage 4.52e+01% DOI:10.13227/j.hjkx.202001092 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795588 Title:Spatial Distribution of Nitrogen Metabolism Functional Genes of Eubacteria and Archaebacteria in Dianchi Lake Title of translation:滇池水中细菌和古菌氮代谢功能基因的空间分布 Authors:Zhang, Yu (1); Zuo, Jian-E (1); Wang, Si-Ke (1); Salimova, Alisa (1); Li, Ai-Jun (2); Li, Ling-Ling (3) Author affiliation:(1) State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China; (2) Yunnan Environmental Monitoring Center Station, Kunming; 650100, China; (3) Kunming Science and Technology Co., Ltd., Kunming; 650228, China Corresponding author:Zuo, Jian-E(jiane.zuo@mail.tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2908-2917 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Nitrogen metabolism plays an important role in the nitrogen cycle and transformation in Dianchi Lake. Not only do eukaryotes participate in nitrogen transformation but prokaryotes, as the main drivers of the nitrogen cycle, also play an extremely important role in the nitrogen cycle. Based on 16S rDNA high-throughput sequencing technology, 13 sites in Caohai and Waihai of Dianchi Lake were monitored, and PICRUSt function analysis method was adopted to analyze the microbial community diversity and key genes of nitrogen metabolism in Dianchi Lake. Bacteria belonging to 35 phyla and 427 genera were found in Dianchi Lake water and mainly included Proteobacteria and Bacteroidetes. Archaea had 14 phyla and 61 genera and mainly belonged to Euryarchaeota. The overall bacterial richness index of Dianchi Lake was higher than that of archaea, and the bacterial diversity index of Caohai was higher than that of Waihai. Functional prediction showed functional richness of bacteria and archaea. There were 35 KO pathways involved in nitrogen metabolism in bacteria, including key genes such as nitrogenous nitrate-reducing gene nirB, nitric oxide reductase gene norB in denitrification, and nitroreductase gene nasK. There were 23 KO pathways involved in nitrogen metabolism in archaea, involving nifH, nifK, and nifD nitrogenase genes in nitrogen fixation. The copy number of nitrogenase genes was significantly higher than that of other nitrogenase genes. The copy number of nitrogen-fixing genes of archaea was higher than that of bacteria, the nitrogen metabolism capacity of archaea in Caohai was higher than that in Waihai, and the potential of nitrogen-fixation of archaea in Dianchi Lake water was higher than that of bacteria. From the perspective of community structure and function prediction of bacteria and archaea, this study discussed the differences of nitrogen cycle in bacteria and archaea in different areas of Dianchi Lake and provided a decision basis for water environment management in Dianchi Lake.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Nitrogen fixation Controlled terms:Bacteria - Genes - Lakes - Metabolism - Nitric oxide Uncontrolled terms:Community structures - Function prediction - Functional predictions - High-throughput sequencing - Microbial communities - Nitric oxide reductase - Nitrogen metabolism - Nitrogen transformations Classification code:461.2 Biological Materials and Tissue Engineering - 802.2 Chemical Reactions - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201909196 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517572 Title:Spatio-temporal Evolution and Population Exposure Risk to PM2.5 in the Guanzhong Area Title of translation:关中地区PM2.5时空演化及人口暴露风险 Authors:Huang, Xiao-Jun (1, 2, 3); Qi, Ming-Yue (1); Li, Yan-Yu (1); Wang, Sen (1, 2, 3); Huang, Xin (4) Author affiliation:(1) College of Urban and Environmental Science, Northwest University, Xi'an; 710127, China; (2) Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi'an; 710127, China; (3) Shaanxi Xi'an Urban Forest Ecosystem Research Station, Xi'an; 710127, China; (4) College of Land Engineering, Chang'an University, Xi'an; 710054, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5245-5255 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, atmospheric pollution represented by fine particulate matter PM2.5 pollution has seriously threatened human health. Therefore, it is important to identify the risk level of population exposure to PM2.5. Based on PM2.5 remote sensing inversion data and population distribution, this study measured the risk level of population exposure to PM2.5 in the Guanzhong area. Furthermore, the methods of Theil-Sen Median trend analysis, Mann-Kendall test, and geo-spatial analysis were used to reveal the temporal and spatial characteristics of population exposures risk to PM2.5 in the Guanzhong area from 2000 to 2016. The results show that: ①The years with heavy pollution and wide range in the Guanzhong area are 2006, 2007, and 2013, and the annual average concentration of PM2.5 exceeded 35 μg•m^-3 in more than 40% of the Guanzhong area. From 2000 to 2016, the spatial distribution range of PM2.5 in the Guanzhong area continued to expand, forming a continuous belt-shaped concentrated distribution area from the center to the northeast. ②More than 60% of the population in the Guanzhong area was exposed in the areas with annual average concentration of PM2.5 above 35 μg•m^-3 from 2000 to 2016, and the population exposure risk continued to increase, especially after 2011, the range of the high-risk area expanded dramatically. ③The pattern of population exposure risk to PM2.5 in the Guanzhong area was generally similar from 2000 to 2016. The areas with higher risk levels were mainly concentrated in the central Guanzhong area, forming a continuous belt-shaped distribution area from west to east. The areas with the highest value were distributed in the urban areas of several major cities, while the areas with the lowest value were mainly concentrated in the surrounding areas of Guanzhong.
© 2020, Science Press. All right reserved. Number of references:58 Main heading:Risk assessment Controlled terms:Belts - Pollution - Population statistics - Remote sensing Uncontrolled terms:Annual average concentration - Atmospheric pollution - Fine particulate matter - Geo-spatial analysis - Mann-Kendall test - Population exposure - Spatiotemporal evolution - Temporal and spatial Classification code:602.1 Mechanical Drives - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 4.00e+01%, Percentage 6.00e+01% DOI:10.13227/j.hjkx.202004189 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008870 Title:Effects of Cotton Stalk Biochar on the Structure and Function of Fungi Community in Alkaline Rhizosphere Soil of Rice Under Cadmium Pollution Title of translation:棉秆炭调控对碱性镉污染水稻根际土壤真菌群落结构和功能的影响 Authors:Liu, Shi-Dou (1); Han, Yao-Guang (1); Zhu, Xin-Ping (1, 2); Wu, Xiang-Nan (3) Author affiliation:(1) College of Grassland and Environmental Sciences, Xinjiang Agricultural University, Urumqi; 830052, China; (2) Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi; 830052, China; (3) Gansu Building Research Institute Limited Company, Lanzhou; 730050, China Corresponding author:Zhu, Xin-Ping(zhuxinping1978@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3846-3854 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the effects of cotton stalk biochar on the regulation of fungal diversity, the structure and function of alkaline rice rhizosphere soil under cadmium pollution was investigated. An outdoor pot experiment was conducted by adding cotton stalk biochar (0%, 1%, and 5%) to an alkaline paddy soil with a cadmium concentration of 0.1 and 8 mg•kg^-1. Taking rice rhizosphere soil as the research object, Illumina HiSeq sequencing was used to analyze the effects of cotton stalk biochar and cadmium pollution on the diversity, structure, abundance, and function of fungi in an alkaline rhizosphere soil, and to explore the correlation between soil environmental factors and the fungal community under the control of cotton stalk biochar. The results showed that: ① the application of cotton stalk biochar significantly increased the soil pH, available nutrients, and organic matter, and reduced the content of reducible cadmium in the soil (P<0.05). ② The distribution of rice rhizosphere soil fungi was mainly Ascomycota, Aphelidiomycota, and Chytridiomycota, which accounted for 57% of all mycophytes. The genus was mainly Mortierella, Alternaria, and Fusarium. There was a significant difference in the α-diversity of the fungal community among the treatments (P<0.05). In the absence of cotton stalk biochar (C0), the increase in the cadmium concentration reduced the relative abundance and fungal diversity index (Shannon index) of Chytridiomycota, Mortierella, and Alternaria in the soil. Under different concentrations of cadmium (Cd0, Cd1, and Cd8), increasing cotton stalk biochar reduced the fungal community richness index (Chao1 index) and Shannon index. Cadmium pollution resulted in an increase in the relative abundance of Chytridiomycota in the soil, but decreased the abundance of Alternaria. The application of cotton stalk biochar could significantly increase the relative abundance of Chytridiomycota (P<0.05). Cadmium pollution reduced the abundance of Mortierella and Alternaria, but the application of cotton stalk biochar could increase the relative abundance of Alternaria. Increasing cotton stalk biochar means that soil will have more endophytes, plant pathogens, and saprophytes; while increasing cadmium pollution will reduce endophytes, plant pathogens, and saprophytes in the soil. ③ The main environmental factors affecting the diversity and structure of fungal communities are the available potassium, organic matter, and pH of the soil. The reducible cadmium content, which comprises the largest proportion of cadmium in rice soil, was significantly positively correlated to Rotifera, Aphelidiomycota, and Ascomycota (P<0.05), but negatively correlated to other mycophytes (P<0.05). The results indicate that cotton stalk biochar plays a certain role in the microecological regulation of alkaline cadmium-contaminated soil.
© 2020, Science Press. All right reserved. Number of references:51 Main heading:Soil pollution Controlled terms:Alkalinity - Biogeochemistry - Cadmium - Cotton - Fungi - Organic compounds - Soil pollution control - Soils Uncontrolled terms:Available nutrients - Available potassiums - Contaminated soils - Environmental factors - Fungal diversity - Relative abundance - Rhizosphere soils - Rice rhizospheres Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1 Chemistry, General - 801.2 Biochemistry - 804.1 Organic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 0.00e+00%, Percentage 1.00e+00%, Percentage 5.00e+00%, Percentage 5.70e+01% DOI:10.13227/j.hjkx.202001201 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953470 Title:Impact of a Sewage Treatment Plant on the Accumulation of Microplastics in Freshwater Organisms in the Lijiang River of the Guilin Urban Section Title of translation:污水处理厂对漓江桂林市区河段淡水生物中微塑料累积的影响 Authors:Xie, Yuan-Shan (1, 2); Zhang, Qing-Ke (1, 2); Zhang, Li-Shan (2, 3); Zhong, Shan (2, 3); Liu, Jun-Yong (1, 2); Hou, Xiao-Ying (1, 2); Wang, Hua (1, 2); Feng, Jing-Pei (1, 2); Liang, Zu-Hong (1, 2); Chen, Wu-Yang (1, 2) Author affiliation:(1) College of Environment and Resources, Guangxi Normal University, Guilin; 541006, China; (2) Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guilin; 541006, China; (3) School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin; 541004, China Corresponding author:Zhang, Li-Shan(2319744660@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4999-5007 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Microplastics (MPs, particle size<5 mm), as a new pollutant, have attracted wide attention in recent years. The distributions of MPs in effluent of a sewage treatment plant (STP) were examined. Surface water, sediment, and freshwater organism samples were taken from the STP discharge outlet in the Lijiang River tributary (S1), the confluence of tributaries and main streams in the Lijiang River (S2), and downstream locations in the Lijiang River (S3). The impact of STP discharge effluent on the characteristics and spatial distribution of MPs pollution in freshwater organisms was studied. The results showed that the freshwater organisms had a probability of uptake of MPs by 94.2%. The mean abundance of MPs in S1 (2.7 n•ind^-1) was significantly higher than that of S3 (1.9 n•ind^-1, P<0.05). The MPs found in S1 and S3 were mainly <0.10 mm, accounting for 46.0% and 30.5%, respectively. The fiber type of MPs was observed in the body of freshwater organisms. Polyethylene terephthalate was the major polymer form in S1 organisms, while polypropylene was the major polymer form in S3. The effluent discharged from the STP led to the accumulation of MPs in freshwater organisms.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Rivers Controlled terms:Biology - Effluent treatment - Effluents - Microplastic - Particle size - Plastic bottles - Polypropylenes - River pollution - Sewage treatment plants - Water Uncontrolled terms:Discharge effluents - Fiber types - Freshwater organisms - Microplastics - River tributaries Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 453 Water Pollution - 461.9 Biology - 694.2 Packaging Materials - 815.1.1 Organic Polymers Numerical data indexing:Percentage 3.05e+01%, Percentage 4.60e+01%, Percentage 9.42e+01% DOI:10.13227/j.hjkx.202003075 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953175 Title:Variation and Driving Factors of Black Water Event Intensity in Lake Taihu During 2009 to 2018 Title of translation:2009~2018年太湖湖泛强度变化及其影响因素 Authors:Xin, Hua-Rong (1); Zhu, Guang-Wei (2); Wang, Xue-Song (3); Li, Jun (3); Lu, Jun (1) Author affiliation:(1) Jiangsu Hydrology & Water Resources Investigation Bureau, Nanjing; 210029, China; (2) Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Jiangsu Hydrology & Water Resources Investigation Bureau Branch Office in Changzhou, Changzhou; 213001, China Corresponding author:Zhu, Guang-Wei(gwzhu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4914-4923 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Using daily survey and monitoring "black water event" (BWE) results in the sensitive area of Lake Taihu from April to October, 2009-2018, as well as the BWE analyzed data for relative meteorological, hydrological, chemical, and algal bloom conditions, the characteristics and yearly differences of BWEs were summarized. A BWE control strategy was suggested. There were 75 BWE occurrences detected in the past 10 years. The average area of a BWE was 1.35 km², with a maximum area of 9.20 km². The BWEs lasted for an average of three days, while the longest lasted 16 days. The BWEs significantly increased organic matter, total nitrogen, total phosphorus, ammonia, and sulfate, among others. All the BWEs occurred at water temperatures over 20℃. All the BWE occurrences started between May and September. The yearly BWE intensity (BWEI) varied significantly among years, with the strongest intensity in 2017 and the second strongest in 2018. The BWEI was significantly positively related to yearly algal bloom intensity (ABI) and average daily water temperature from May to September, while there was no significant relationship with major nutrient indicators. This suggests that climatic variation among years will significantly influence the risk of a BWE in Lake Taihu. The occurrence of a BWE was significantly influenced by a polluted river mouth. Almost all the BWEs occurred near river mouths, except for five macrophyte-related BWEs. This suggests that sediment pollution and its resuspension could be strongly related to the occurrence of a BWE. When considering degradation factors, a BWE could be classified as an algal-related BWE and a macrophyte-related BWE. The algal-related BWE could be further classified into three types: river-related BWE, bloom transport BWE, and local origin BWE. This research suggests that algal bloom control will be the fundamental countermeasure to decrease the risk of a BWE. Bloom abatement treatments, including mechanical bloom cleaning, water current adjustment engineering, coast-away bloom cleaning engineering, mechanical aeration treatment, and sediment dredging near river mouths would be effective methods to abate the risk of a BWE.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:River pollution Controlled terms:Ammonia - Chemical analysis - Dredging - Lakes - Rivers - Sulfur compounds - Temperature Uncontrolled terms:Aeration treatment - Climatic variation - Control strategies - Degradation factor - Polluted rivers - Sediment pollution - Total phosphorus - Water temperatures Classification code:453 Water Pollution - 641.1 Thermodynamics - 804.2 Inorganic Compounds Numerical data indexing:Age 1.00e+01yr, Age 4.38e-02yr, Area 1.35e+06m2, Area 9.20e+06m2 DOI:10.13227/j.hjkx.202004172 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796295 Title:Toxicological Effects of Enrofloxacin and Its Removal by Freshwater Micro-Green Algae Dictyosphaerium sp. Title of translation:胶网藻对水体中恩诺沙星的毒性响应及去除作用 Authors:Wang, Zhen-Fang (1, 2, 3); Han, Zi-Yu (1, 2, 3); Wang, Meng-Xue (1, 2, 3); Ma, Yi-Chi (1, 2, 3); Wang, Ting (1, 2, 3); Wang, Li-Qing (1, 2, 3); Zhang, Wei (1, 2, 3) Author affiliation:(1) Centre for Research on Environmental Ecology and Fish Nutrient (CREEFN) of the Ministry of Agriculture, 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) National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai; 201306, China Corresponding author:Zhang, Wei(weizhang@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2688-2697 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Enrofloxacin (ENR), a fluoroquinolones antibiotic, is widely used in the medical and aquaculture fields. Its residues in surface waters in China are high. However, few studies have evaluated both its toxicity to phytoplankton and the degradation or removal by microalgae. In this study, the growth, photosynthetic activity, and exopolysaccharides (EPS) of freshwater micro-green algae Dictyosphaerium sp. and the dynamics of ENR concentrations (0, 5, 25, 50, and 100 mg•L^-1) were studied through an exposure experiment for 12 days. Results showed that the biomass and photosynthetic pigment content of Dictyosphaerium sp. increased with increasing exposure time in each treatment; however, it showed a significant inhibitory effect on the growth and pigment accumulation of Dictyosphaerium sp. compared with the control group (P<0.01). The LC50 of ENR to Dictyosphaerium sp. was (241.29±7.33) mg•L^-1 after 96-h exposure, indicating that Dictyosphaerium sp. could adapt to the stress conditions of high concentration ENR. Meanwhile, when the concentration of enrofloxacin was<5 mg•L^-1, it was found to promote the maximum photosynthetic rate (Fv/Fm) of Dictyosphaerium sp. On the contrary, when the concentration of enrofloxacin was>5 mg•L^-1, photosynthetic inhibition was observed (P<0.01). The actual photosynthetic rate (Yield) and the maximum electron transfer rate (ETRmax) showed a trend of initially decreasing and then increasing in 12 days. It can gradually adapt to the stress conditions and recover certain photosynthetic activity after 6 days' exposure. In addition, ENR can also stimulate the EPS (RPS and CPS) release. At the end of the experiment, the removal rates of ENR in the four control groups (no algae addition groups) (5, 25, 50, and 100 mg•L^-1ENR) were 7.27%, 5.56%, 5.30%, and 4.88%, respectively, while the removal rates of the treatment groups were 3.21, 3.01, 2.69, and 2.83 times of the no algae groups, indicating that Dictyosphaerium sp. had a significant promoting effect on the removal of ENR (P<0.01). Overall, our results can provide new insights for the understanding of the ecological toxicity of fluoroquinolone antibiotics to primary producers in the aquatic system and also provide new ideas for the ecological removal of antibiotic residues in water bodies and the biological resource utilization of freshwater microalgae.
© 2020, Science Press. All right reserved. Number of references:53 Main heading:Algae Controlled terms:Antibiotics - Ecology - Microorganisms - Surface waters - Toxicity - Water Uncontrolled terms:Biological resources - Ecological toxicity - Electron transfer rates - Fluoroquinolone antibiotics - Freshwater microalgae - Photosynthetic activity - Photosynthetic pigment contents - Toxicological effects Classification code:444.1 Surface Water - 454.3 Ecology and Ecosystems - 461 Bioengineering and Biology Numerical data indexing:Age 3.29e-02yr, Mass_Density 1.00e-01kg/m3 to 2.20e-02kg/m3, Percentage 4.88e+00%, Percentage 5.30e+00%, Percentage 5.56e+00%, Percentage 7.27e+00%, Time 3.46e+05s DOI:10.13227/j.hjkx.201912227 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796260 Title:Identifying Nitrate Sources in a Typical Karst Underground River Basin Title of translation:典型岩溶地下河流域水体中硝酸盐源解析 Authors:Zhao, Ran (1); Han, Zhi-Wei (1, 2); Shen, Chun-Hua (1); Zhang, Shui (1); Tu, Han (1); Guo, Yong-Li (3) Author affiliation:(1) College of Resource and Environmental Engineering, Guizhou University, Guiyang; 550025, China; (2) Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang; 550025, China; (3) Key Laboratory of Karst Dynamics Laboratory, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China Corresponding author:Han, Zhi-Wei(zwhan@gzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2664-2670 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Underground rivers are an important source of groundwater in karst area. Recently, nitrate pollution of underground rivers has become a serious issue. To identify the sources of nitrate in Guancun typical karst underground river basin, stable isotope techniques (δ¹⁵N-NO3^-, δ¹⁸O-NO3^-, and δ¹⁸O-H2O) were applied in this study. The contribution rates of different nitrate sources in groundwater were quantitatively identified based on the stable isotope analysis in R (SIAR) model, and the influence of land use type on nitrate distribution and source in watershed water was clarified. The results showed that ① nitrate mainly came from fertilizers, soil organic nitrogen, and manure/sewage based to the isotopic composition of nitrate nitrogen and oxygen isotopes. It was revealed that non-point sources significantly contributed to nitrate in waters of the Guancun underground river basin. ② Nitrification dominated the formation process of nitrate in groundwater, and the initial values of nitrogen and oxygen isotopes were not affected by fractionation. ③ Based on SIAR, the contribution of different sources to nitrate in water in the basin varied seasonally, and the contributions of fertilizer, soil organic nitrogen, and manure/sewage to nitrate were 57.07%, 34.06%, and 8.87% in the wet season and 34.14%, 33.02%, and 32.84% in the dry season, respectively. Overall, the present study quantitatively evaluated the temporal variations of nitrate sources in a typical karst groundwater river basin and provided a theoretical foundation for prevention and control management of non-point source pollution and watershed management in karst areas.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:River pollution Controlled terms:Groundwater - Groundwater pollution - Isotopes - Land use - Landforms - Manures - Nitrates - Nitrogen fertilizers - Pollution control - Rivers - Soil conservation - Water conservation - Water management - Watersheds Uncontrolled terms:Isotopic composition - Nitrate distribution - Nitrogen and oxygen isotopes - Non-point source pollution - Prevention and controls - Stable-isotope analysis - Theoretical foundations - Watershed management Classification code:403 Urban and Regional Planning and Development - 444 Water Resources - 453 Water Pollution - 481.1 Geology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.5 Agricultural Wastes Numerical data indexing:Percentage 3.28e+01%, Percentage 3.30e+01%, Percentage 3.41e+01%, Percentage 5.71e+01%, Percentage 8.87e+00% DOI:10.13227/j.hjkx.201911046 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796301 Title:Localization of Soil Wind Erosion Dust Emission Factor in Beijing Title of translation:北京市土壤风蚀扬尘排放因子本地化 Authors:Li, Bei-Bei (1); Huang, Yu-Hu (1); Bi, Xiao-Hui (2); Liu, Li-Yang (1, 3); Qin, Jian-Ping (1) Author affiliation:(1) National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300071, China; (3) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China Corresponding author:Huang, Yu-Hu(huangyuhu@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2609-2616 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil wind erosion dust is one of the primary sources of fine particulate matter (PM2.5). Compared with the fugitive dust emission inventory of typical domestic provinces and cities, we found that the maximum among the contribution rates of soil wind erosion dust to the local total fugitive dust PM2.5 emission inventory was about 4 orders of magnitude higher than the minimum. This study provided a wind erosion equation and a determination method of parameter values. The remote sensing interpretation, China soil dataset, and meteorological data of each district in Beijing were used to achieve the spatial distribution of the vegetation coverage factor (V), soil erodibility index (I), and climatic factors (C) in the plain area of Beijing. This study also estimated the emission factor of soil wind erosion dust and its spatial distribution. The main conclusions are as follows: ① Taking 2017 and Beijing city as an example, it was found that the climatic factor (C) was underestimated to different extents by domestic scholars, and PM2.5 emission factors were overestimated or underestimated. ② V, I, and C showed apparent spatial differences and the average values of them were 0.63±0.09, 188±73, and 0.029±0.009, respectively. The maximum values of V, I, and C were 1.5, 2.1, and 4.5 times the minimum among all districts, respectively. ③ The PM2.5 emission factor of soil wind erosion dust in Beijing showed a high spatial distribution in the northwest and southeast. The average emission factor of the city was (0.001 8±0.000 8) t•(hm²•a)^-1, which is 0.54 times the highest emission factor (Xicheng District) and 3.12 times the lowest (Pinggu District). The area proportions of standardized emission factors with higher intensity (0.6 to 0.8] and high intensity (0.8 to 1.0] was 0.72% and 0.04%, respectively.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Soil surveys Controlled terms:Dust - Erosion - Meteorology - Remote sensing - Soils - Spatial distribution Uncontrolled terms:Determination methods - Emission inventories - Fine particulate matter (PM2.5) - Fugitive dust emissions - Meteorological data - Remote sensing interpretation - Spatial differences - Vegetation coverage Classification code:451.1 Air Pollution Sources - 483.1 Soils and Soil Mechanics - 921 Mathematics Numerical data indexing:Percentage 4.00e-02%, Percentage 7.20e-01% DOI:10.13227/j.hjkx.201908243 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990447 Title:Distribution Characteristics and Ecological Risk Assessment of Phthalate Esters in Surface Sediments of the Songhua River Title of translation:松花江表层沉积物PAEs分布特征及生态风险评价 Authors:Wang, Huan (1, 2, 3); Yang, Yong-Zhe (1); Wang, Hai-Yan (2, 3); Dong, Wei-Yang (2, 3); Yan, Guo-Kai (2, 3); Chang, Yang (2, 3); Li, Ze-Wen (2, 3); Zhao, Yuan-Zhe (1, 2, 3); Ling, Yu (2, 3) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Research Center for Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Wang, Hai-Yan(wanghy@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:232-241 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study assesses the spatial distribution characteristics and ecological risk of phthalate esters (PAEs) in the surface sediments of the mainstream and tributaries of the Songhua River, China, using concentrations and composition of six PAEs, which were analyzed using gas chromatography-mass spectrometery (GC-MS). We assess the ∑6PAEs ecological risk using the hazard quotient (HQ) method and environmental risk levels (ERL). The results were as follows. ① It was found that the total concentrations of ∑6PAEs ranged from 6 832.5 to 36 298.9 ng•g^-1 dry weight (average 18 388.6 ng•g^-1), with the main contributions coming from di-(2-ethylhexyl) phthalate (DEHP) and di-n-butyl phthalate (DBP). The difference between the main stream ∑6PAEs (6 832.5-36 298.9 ng•g^-1, average 18 616.9 ng•g^-1) and the tributary ∑6PAEs (10 367.6-26 593.3 ng•g^-1, average 18 264.1 ng•g^-1) was not significant (P >0.05). The mean concentrations of individual PAEs in the tributary stream differed little from that of the main stream. The ∑6PAEs concentration of the Songhua River decreased initially but then increased from the upstream to the downstream. The average ∑6PAEs concentration in natural agricultural areas (18 677.5 ng•g^-1) was similar to that found in urban industrial areas (18 063.7 ng•g^-1), and DBP and DEHP contributed 98% of ∑6PAEs. ② The main sources of ∑6PAEs were domestic, agricultural production, and industrial production using plasticizers. ③ The ecological risk assessment indicated that DMP and BBP in the surface sediments of the Songhua River did not pose an ecological risk for aquatic organisms, and that DEP was associated with a low ecological risk, whereas DEHP and DBP posed a high ecological risk for aquatic organisms.
© 2020, Science Press. All right reserved. Number of references:68 Main heading:Risk assessment Controlled terms:Agricultural robots - Agriculture - Aquatic organisms - Ecology - Esters - Gas chromatography - Rivers - Solvents - Surficial sediments Uncontrolled terms:Agricultural productions - Di-2-ethylhexyl phthalate - Di-n-butyl phthalate - Distribution characteristics - Ecological risk assessment - Environmental risks - Industrial production - Mean concentrations Classification code:454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 9.80e+01% DOI:10.13227/j.hjkx.201907138 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278135 Title:Succession Characteristics and Water Quality Responsiveness Evaluation of FG and MBFG in Yanlong Lake Water Source Ecological Purification System Title of translation:盐龙湖水源生态净化系统FG和MBFG演替特征及水质响应性评价 Authors:Wang, Lian (1, 2); Li, Xuan (2); Ma, Wei-Xing (2); Zou, Li-Hang (1, 2); Zhao, Qiang-Qiang (2); Ding, Cheng (1, 2); Wu, Xiang-Yang (1) Author affiliation:(1) School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang; 212013, China; (2) College of Environmental Science and Engineering, Yancheng Institute of Technology, Yancheng; 224000, China Corresponding author:Li, Xuan(lixuan@ycit.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1265-1275 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the water purification efficiency and phytoplankton control efficiency of the water source ecological purification system, and evaluate the effectiveness of the functional group (FG) and morphology-based functional group (MBFG) in response to the internal environment and water quality of the water source ecological purification system, in the summer of 2018, the water quality and phytoplankton functional groups of each unit of the Yanlong Lake ecological purification system were monitored and analyzed. The results showed that the Yanlong Lake water source ecological purification system can effectively purify the water. The average values of total phosphorus, total nitrogen, dissolved oxygen, and turbidity in the influent water were 0.20 mg•L^-1, 1.91 mg•L^-1, 2.88 mg•L^-1, and 60.23 NTU, respectively; after system treatment, these were 0.09 mg•L^-1, 0.95 mg•L^-1, 6.26 mg•L^-1, and 39.53 NTU, respectively. Simultaneously, the spatial distribution of water quality within the system was heterogeneous, with significant spatial differences in dissolved oxygen (DO), pH, and turbidity (P<0.001). The Yanlong Lake water source ecological purification system could effectively control the density of phytoplankton (4.42×10⁵-4.32×10⁶ cells•L^-1) when the effluent was in a mild eutrophication state. This reduced the risk of algal blooms. There were five absolute advantage FG: B, P, TC, J, and W1. There were six absolute advantage MBFG: GroupⅠ, GroupⅢ, GroupⅣ, GroupⅤ, GroupⅥ, and GroupⅦ. Both absolute dominant functional groups were effective in indicating changes in habitat conditions. The results of RDA analysis found that the environmental interpretation of the MBFG was higher than that of the FG. The results suggested that it is more appropriate to study the dynamics of phytoplankton in the Yanlong Lake ecological purification system in summer by selecting the MBFG classification method.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Quality control Controlled terms:Biochemical oxygen demand - Dissolved oxygen - Efficiency - Effluents - Eutrophication - Lakes - Phytoplankton - Purification - Turbidity - Water quality Uncontrolled terms:Classification methods - Distribution of water - Habitat conditions - Purification systems - Redundancy analysis - Regulation - Response - Spatial differences Classification code:445.2 Water Analysis - 452.3 Industrial Wastes - 471 Marine Science and Oceanography - 741.1 Light/Optics - 913.1 Production Engineering - 913.3 Quality Assurance and Control Numerical data indexing:Mass_Density 1.91e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 2.88e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 6.26e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 9.00e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 9.50e-04kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201905068 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278152 Title:Stable Nitrite Accumulation and Phosphorus Removal from High-nitrate and Municipal Wastewaters in a Combined Process of Partial Denitrification and Denitrifying Phosphorus Removal (PD-DPR) Title of translation:PD-DPR系统处理城市污水与高硝酸盐废水实现稳定亚硝酸盐积累和磷去除的特性 Authors:Wang, Qiu-Ying (1); Yu, De-Shuang (1); Zhao, Ji (1); Wang, Xiao-Xia (1); Yuan, Meng-Fei (1); Gong, Xiu-Zhen (1); Chu, Guang-Yu (1); He, Tong-Hui (1) Author affiliation:(1) School of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China Corresponding author:Wang, Xiao-Xia(elainwangxx@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1384-1392 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, a novel process combining partial denitrification (PD, NO3^--N〖FY1〗NO2^--N) and denitrifying phosphorus removal (DPR) in an anaerobic-anoxic-aerobic sequencing batch reactor (SBR) was developed. By comprehensively controlling the influent C/N ratio, anaerobic drainage ratio, and anoxic duration, the nitrite accumulation and phosphorus removal performance of a system treating high-strength nitrate and municipal wastewaters was investigated. The results showed that, after 140 days, the nitrate-to-nitrite transformation ratio (NTR) was 80.1%, and PO4^3--P removal efficiency was 97.64%. In the anaerobic stage (180 min), glycogen-accumulating organisms (GAOs) and phosphorus-accumulating organisms (PAOs) efficiently utilized the carbon source in municipal wastewater to enhance intracellular carbon storage. In the anoxic stage (150 min), denitrifying GAOs (DGAOs) and heterotrophic denitrifying bacteria (DOHOs) carried out endogenous and exogenous short-range denitrification, respectively, to achieve stable nitrite accumulation; simultaneously, denitrifying PAOs (DPAOs) carried out denitrifying phosphorus uptake to achieve efficient phosphorus removal. In the aerobic stage (10 min), without initiating ammonia/nitrite oxidation, PAOs absorbed excessive phosphorus, which improved the phosphorus removal performance of the system. The effluent NO2^--N/NH4⁺-N of a ratio of 1.31:1 (close to the theoretical value of ANAMMOX process, 1.32:1), with little PO4^3--P and COD (0.30 and 12.94 mg•L^-1), meets the requirements for deep-level nitrogen removal by coupling with ANAMMOX process.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Nitrogen removal Controlled terms:Ammonia - Anoxic water - Bacteria - Batch reactors - Chemical oxygen demand - Denitrification - Effluents - Nitrates - Nitration - Nitrogen oxides - Wastewater treatment Uncontrolled terms:ANAMMOX - Denitrifying phosphorus removal - Glycogen accumulating organisms - Intracellular carbon - Nitrate wastewaters - Partial denitrification (PD) - Phosphorus accumulating organisms - Sequencing batch reactors Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Age 3.84e-01yr, Mass_Density 1.29e-02kg/m3, Mass_Density 3.00e-04kg/m3, Percentage 8.01e+01%, Percentage 9.76e+01%, Time 1.08e+04s, Time 6.00e+02s, Time 9.00e+03s DOI:10.13227/j.hjkx.201909251 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278136 Title:Pollution Characteristics of Volatile Organic Compounds Emission from the Metal Packaging Industry Based on Analysis of Process Title of translation:基于工艺过程的金属包装业VOCs污染特征 Authors:Wang, Di (1); Nie, Lei (2); Zhao, Wen-Juan (1); Zhang, Wei-Qi (1); Dang, Hong-Yan (1); Shao, Xia (2); Zhang, Xin-Min (1) Author affiliation:(1) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, Air Pollution Control Research Institute, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China Corresponding author:Shao, Xia(shaoxia668@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1099-1106 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study identified the generation and emission nodes of volatile organic compounds (VOCs) in the metal packaging industry, analyzed the VOCs concentration and species from different production processes, and accounted for secondary pollution through the maximum incremental reactivity method and modified fractional aerosol coefficient method. The results indicated that the main VOCs species were benzenes, alcohols, ketones, and esters, and the benzenes and alcohols contributed more in different types of processes and emission nodes, whereas the ketones and esters contributed less. The maximum concentration was 269.08mg•m^-3 (n-butanol). Strong correlation was found between the concentrations of the production line and their corresponding exhaust, but the VOC species were not totally identical. Furthermore, the potential formations of ozone and secondary organic aerosols were (3.09±0.94) g•g^-1 and (2.58±1.99) g•g^-1, respectively, expressed by O3/VOCs and SOA/VOCs, and the benzenes and internal coating drying being the major precursors and emission node.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Air pollution Controlled terms:Aerosols - Benzene - Esters - Gas chromatography - Ketones - Ozone - Volatile organic compounds Uncontrolled terms:Coefficient methods - Emission profile - Maximum concentrations - Maximum incremental reactivities - Metal packaging - Ozone formation potentials - Secondary organic aerosols - Secondary pollution Classification code:451 Air Pollution - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201904210 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070567 Title:Diurnal Variations and Source Apportionment of Water-soluble Ions in PM2.5During Winter in Nanjing Jiangbei New Area Title of translation:南京江北新区冬季PM2.5中化学组分的昼夜变化特征及其来源解析 Authors:Qiu, Chen-Chen (1); Yu, Xing-Na (1); Ding, Cheng (1); Shi, Zheng (1); Zhang, Rui-Fang (1); Hou, Si-Yu (1); Hou, Xin-Hong (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:529-536 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To gain a better understanding of the day-night variation characteristics of water-soluble ions, PM2.5samples were continuously collected for two months in the Nanjing Jiangbei New Area during winter. The diurnal variation and sources of water-soluble ions were studied. Results showed that the mass concentration of water-soluble ions ranged from 17.07 μg•m^-3 to 168. 43 μg•m^-3 with a mean value of (59.01±30.75) μg•m^-3. The average mass concentration of water-soluble ions in daytime was higher than that in the nighttime. The concentration ratio of NO3^- and NH4⁺ to total ion concentrations was higher at night, while SO4^2- and Cl^- were higher during daytime. SO4^2-, NO3^-, and NH4⁺ (SNA) were the dominant species of water-soluble ions in PM2.5 in Nanjing. The mass concentration of SNA on polluted days was higher than that on clean days. The ratio of the anion-cation balance (AE/CE) was larger than 1, indicating that the PM2.5 was acidic. There was a significant linear correlation between NH4⁺ with NO3^- and SO4^2-, indicating that it occurred mainly in the form of NH4NO3 and (NH4)2SO4 in PM2.5. The PMF source apportionment indicated that water-soluble ions of PM2.5 were mainly derived from motor vehicle emissions, fossil fuel combustion, biomass burning, and dust in the Nanjing Jiangbei New Area.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Ions Controlled terms:Fossil fuels - Nitrogen compounds Uncontrolled terms:Day-night characteristics - Nanjing - PM2.5 - Source analysis - Water-soluble ions DOI:10.13227/j.hjkx.201908066 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070251 Title:Gridded Atmospheric Emission Inventory of PCDD/Fs in China Title of translation:我国PCDD/Fs网格化大气排放清单 Authors:Chen, Lu-Lu (1); Huang, Tao (1); Chen, Kai-Jie (1); Song, Shi-Jie (1); Gao, Hong (1); Ma, Jian-Min (1, 2) Author affiliation:(1) Key Laboratory for Environmental Pollution Prediction and Control, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; Gansu Province; 730000, China; (2) Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing; 100871, China Corresponding author:Huang, Tao(huangt@lzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:510-519 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:PCDD/Fs emission inventory is the basis for PCDD/Fs control, research on environmental fate behavior, and health risk assessment. In the present study, based on officially released PCDD/Fs emissions inventory for each industry in China in 2004, we estimated atmospheric PCDD/Fs emissions by sector in various provinces in 2016 by combining the emission intensity in the "Identification and Quantification of PCDD/Fs Emission Standards Toolkit" released by the United Nations Environment Program (UNEP) in 2013. Subsequently, using different gridding data for various sectors as surrogate data, we established atmospheric gridded emission inventory (1/4°×1/4°latitude by longitude) for PCDD/Fs in China. Finally, the uncertainty of PCDD/Fs emission inventory was analyzed. Results show that the atmospheric emissions of PCDD/Fs in China in 2016 were 10 366 g, which was about two times higher than that in 2004. From the perspective of the emission sector, metal smelting is the largest emitter of PCDD/Fs in China, which released 5 333 g, followed by waste incineration (2 469 g), heating and power generation (1 290 g), and mineral production (933 g). These four sectors accounted for 97% of China's total PCDD/Fs emissions. In spatial terms, China's atmospheric PCDD/Fs emissions are mainly concentrated in the Beijing-Tianjin-Hebei, Yangtze River Delta, and Pearl River Delta regions. PCDD/Fs emissions from the Beijing-Tianjin-Hebei and Yangtze River Delta regions originate mainly from steel smelting, and that from the Pearl River Delta region is mainly due to waste incineration.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Waste incineration Controlled terms:Air pollution - Atmospheric spectra - Atmospherics - Hazardous materials - Health risks - Mineral industry - Risk assessment - Rivers - Uncertainty analysis Uncontrolled terms:China - Dioxin - Emission characteristics - Emission inventories - Gridded Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 452.4 Industrial Wastes Treatment and Disposal - 461.7 Health Care - 914.1 Accidents and Accident Prevention - 922.1 Probability Theory Numerical data indexing:Mass 1.04e+01kg, Mass 1.29e+00kg, Mass 2.47e+00kg, Mass 5.33e+00kg, Mass 9.33e-01kg, Percentage 9.70e+01% DOI:10.13227/j.hjkx.201908056 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861784 Title:Adsorption Characteristics and Mechanism of Cadmium in Water by Alkali and Magnetic Composite Modified Wheat Straw Biochar Title of translation:碱和磁复合改性小麦秸秆生物炭对水体中镉的吸附特性及机制 Authors:Cui, Zhi-Wen (1, 2); Ren, Yan-Fang (1, 2, 3); Wang, Wei (1, 2); Zhang, Li-Ming (1, 2); Zhang, Lu-Yun (1, 2); Wang, Xi-Yue (1, 2); He, Jun-Yu (1, 2, 3) Author affiliation:(1) School of Environmental and Safety Engineering, Changzhou University, Changzhou; 213164, China; (2) Jiangsu Petrochemical Safety and Environmental Engineering Research Center, Changzhou; 213164, China; (3) College of Agriculture, Guizhou University, Guiyang; 550025, China Corresponding author:Ren, Yan-Fang(yanfangren@126.comemailjunyuhe0303@126.com)He, Jun-Yu(junyuhe0303@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3315-3325 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Wheat straw biochar (BC) was modified by KOH and magnetics to generate composited modified biochar (FKC). Based on characterization by scanning electron microscopy-energy dispersive spectrometry (SEM-EDS), Brunauer-Emmett-Teller (BET), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and magnetic (VSM) techniques, the adsorption characteristics and mechanisms of Cd²⁺ in water and the effects of temperature, pH value, and dosage on the adsorption characteristics of FKC were studied. The results showed that the modified biochar was loose and porous. The specific surface area of FKC increased by 19.11 times, the number of aromatic and oxygen-containing functional groups such as O-H, C〖FY=,1〗O, and C〖FY=,1〗C increased, and a new functional group Fe-O formed compared to the BC. FKC is magnetic, and its magnetization is 8.43 emu•g^-1, which can be recycled and reused. The adsorption of Cd²⁺ by FKC fitted well with the pseudo-second-order kinetic model and the Langmuir model, indicating that chemical adsorption is the main adsorption mechanism. The theoretical maximum equilibrium adsorption capacity of FKC is 23.44 mg•g^-1, which is 1.47 times that of BC. The thermodynamic parameters suggested the adsorption of Cd²⁺ by FKC was a spontaneous and endothermic process. The adsorption capacity increased with an increase of pH in the region 2-8, and a biochar dosage of 10 g•L^-1 was used. After three cycles of adsorption-desorption-adsorption, the adsorption capacity of Cd²⁺ by FKC still reached 17.71 mg•g^-1, indicating that FKC has good reusability. These results can provide a theoretical basis for the application of KOH and magnet-modified biochar from wheat straw to remove heavy metals from contaminated wastewater.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Cadmium compounds Controlled terms:Adsorption - Cadmium - Cadmium metallography - Chemicals removal (water treatment) - Iron compounds - Magnetism - Potassium hydroxide - Reusability - Scanning electron microscopy - Straw Uncontrolled terms:Adsorption characteristic - Brunauer emmett tellers - Contaminated wastewater - Energy dispersive spectrometry - Equilibrium adsorption capacity - Fourier transform infrared - Oxygen-containing functional groups - Pseudo-second-order kinetic models Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 701.2 Magnetism: Basic Concepts and Phenomena - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.5 Agricultural Wastes Numerical data indexing:Mass_Density 1.00e+01kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201912025 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608862011 Title:Effects of Water Management on Soil Properties and Cd Behavior of Typical Paddy Soils Title of translation:不同母质发育土壤Cd环境行为对水分管理模式的响应差异 Authors:Huang, Jing (1); Li, Xin-Yang (1); Wen, Sha (1); Jiang, Kai (1); Long, Jian (1); Peng, Pei-Qin (1); Hou, Hong-Bo (1) Author affiliation:(1) College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China Corresponding author:Long, Jian(longjiancsuft@yeah.netemailpqpeng123@sina.com)Peng, Pei-Qin(pqpeng123@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3418-3425 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the effects of water management mode on Cd environmental behavior in different parent-material-developed paddy soils, two parent-material-developed paddy soils (yellow clayey soil and granitic sandy soil) under three exogenous Cd levels (0.5, 2.0, and 5.0 mg•kg^-1) with different water management modes (long-term flooding, moistening irrigation, and wet-dry rotation) were cultured in this study. The soil redox potential (Eh value), pH value, Cd concentration in soil solution, and Cd fractionation were also determined. The results showed that water management mode had different effects on the pH and Eh values of soils developed from different parent materials. The change rates of soil pH value were as follows: long-term flooding: -2.61% (yellow clayey soil), 2.25% (granitic sandy soil); alternation of dry and wet: -1.96% (yellow clayey soil); 0.52% (granitic sandy soil); wet irrigation: -4.08% (yellow clayey soil) and -0.52% (granitic sandy soil). The Eh value of the soils was negatively correlated with the pH value. The influence pattern of water management model on Cd mass concentration of soil solutions in two parent-material soils was consistent. The Cd mass concentration of soil solutions in granitic sandy soil was higher than that in yellow clayey soil. The mean values of Cd concentration were 1.03 μg•L^-1 for yellow clayey soil and 1.07 μg•L^-1 for granitic sandy soil. Water management mode had no significant effect on the proportions of organic bound Cd or Fe-Mn bound Cd in two different parent-material-developed soils. The long-term flooding mode promoted the transformation of exogenous Cd to residual Cd, and this promotion in yellow clayey soil was higher than that in granitic sandy soil. In conclusion, during the process of regulating soil Cd bioavailability through water management, the role of soil parent materials needs to be considered.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Pollution Controlled terms:Binary alloys - Biochemistry - Cadmium - Floods - Iron alloys - Irrigation - Manganese alloys - Manganese removal (water treatment) - pH - Redox reactions - Sand - Soil moisture - Water management Uncontrolled terms:Cd concentrations - Different effects - Environmental behavior - Influence patterns - Mass concentration - Soil redox potential - Water management model - Yellow clayey soils Classification code:445.1 Water Treatment Techniques - 483.1 Soils and Soil Mechanics - 543.2 Manganese and Alloys - 545.2 Iron Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1 Chemistry, General - 801.2 Biochemistry - 802.2 Chemical Reactions - 821.3 Agricultural Methods Numerical data indexing:Percentage -4.08e+00%, Percentage -5.20e-01%, Percentage 2.25e+00%, Percentage 5.20e-01%, Mass_Density 1.03e-06kg/m3 to 2.20e-02kg/m3, Mass_Density 1.07e-06kg/m3 to 2.20e-02kg/m3, Percentage -1.96e+00%, Percentage -2.61e+00% DOI:10.13227/j.hjkx.201911258 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371221 Title:Vertical Distribution of Soil Dissolved Carbon and Its Influencing Factors in the Artificial Shelterbelt Irrigated with Saline Water in an Extreme Drought Desert Title of translation:极端干旱区咸水灌溉人工防护林土壤可溶性碳的垂直分布及其影响因素 Authors:Meng, Tian-Ge (1); Wu, Lu-Yao (1); Zhang, Shao-Lei (1); Xu, Yan-Ying (1); Li, Xiong (1); Zhang, Jian-Guo (1, 2) Author affiliation:(1) Ministry of Agriculture Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Yangling; 712100, China Corresponding author:Zhang, Jian-Guo(zhangjianguo21@nwafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1950-1959 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Dissolved carbon (DC) is the most active carbon fraction in soils. Vegetation restoration and reconstruction accelerate the carbon cycle in arid desert regions. Studying the DC distribution in soil profiles of artificial shelterbelt under saline irrigation can provide theoretical support and decision-making basis for artificial shelterbelt management, development, and utilization in arid desert areas. In this study, we took the artificial shelterbelts drip-irrigated with five different mineralization and one shifting sandy land (CK) along the Taklimakan Desert Highway as sampling plots, analyzed and discussed the vertical distribution characteristics of soil dissolved organic carbon (SDOC) and dissolved inorganic carbon (SDIC) in the 0-1 m profiles, and further analyzed their relationships among different factors. The results showed that SDOC and SDIC of CK and shelterbelts under 2.82 g•L^-1 irrigation showed an "I" type distribution with a linear function relationship. The SDOC and SDIC of four other treatments showed a "Γ" type distribution with power function relationships. The fluctuation ability and contribution degree of SDOC and SDIC of different treatments in the surface layer were higher than those in the lower layers, and the fluctuation and contribution intensity of SDOC were higher than those of SDIC. Except for 2.82 g•L^-1 treatment, the average SDOC contents of other treatments were 2-4 times those of SDIC. The average SDOC content of 2.82 g•L^-1 treatment was lower than CK; other treatments were 3-5 times that of CK; and the average SDIC content of all treatments increased 15.0%-57.9% than CK. For the 0-5 cm layer, SDOC content increased with the irrigation water mineralization except the 2.82 g•L^-1 treatment, but SDIC content firstly increased and then decreased with increasing mineralization, and that for the 4.82 g•L^-1 treatment was highest. The SDOC and SDIC were positively correlated with EC, SOC, irrigation water mineralization, SIC, and soil moisture, for which they both showed a weak positive correlation with soil moisture; they were negatively correlated with soil depth. The SDOC and SDIC showed a weak negative correlation and a weak positive correlation with pH, respectively. In summary, the mineralization of irrigation water has an important impact on the vertical distribution of SDOC and SDIC, and their distribution also has close relationships with EC, SOC, SIC, soil moisture, and soil depth, which is of great significance for plantations in extremely drought deserts.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Saline water Controlled terms:Arid regions - Decision making - Dissolution - Drought - Irrigation - Landforms - Mineralogy - Organic carbon - Soil moisture - Soil surveys - Stream flow Uncontrolled terms:Desert highways - Dissolved carbons - Dissolved inorganic carbon - Dissolved organic carbon - Saline irrigation Classification code:407.2 Waterways - 444 Water Resources - 481.1 Geology - 482 Mineralogy - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804.1 Organic Compounds - 821.3 Agricultural Methods - 912.2 Management Numerical data indexing:Mass_Density 2.82e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 4.82e+00kg/m3 to 2.20e-02kg/m3, Percentage 1.50e+01% to 5.79e+01%, Size 0.00e+00m to 1.00e+00m, Size 0.00e+00m to 5.00e-02m DOI:10.13227/j.hjkx.201909003 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371190 Title:Construction and Denitrification Performance of A²/O Based on Partial Nitrification Coupled with an ANAMMOX System Title of translation:A²/O短程硝化耦合厌氧氨氧化系统构建与脱氮特性 Authors:Liu, Xiao-Chai (1); Rong, Yi (1); Wen, Li-Jie (1); Li, Dang-Yong (2); Jin, Peng-Kang (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Construction Engineering Installation Group Co., Ltd., Xi'an; 710068, China Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1779-1786 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To resolve the issue of existing municipal wastewater treatment plants (WWTPs) in China with an insufficient influent carbon source, a bench-scale A²/O process based on partial nitrification coupled with ANAMMOX was constructed by controlling aeration partition ratio, dissolved oxygen (DO) concentration, and sludge retention time (SRT). In this study, the nitrogen removal performance, nitrogen removal pathway, and microbial community structure of the system under different conditions were investigated. The results showed that the system had excellent nitrogen removal efficiency at low-C/N influent (C/N=5). The A²/O reactor had experienced the co-culture stage (Phase 1), screening stage (Phase 2-3), and enrichment stage (Phase 4) successively during the 140-day experiment, and the nitrogen removal pathway changed from nitrification and denitrification to partial nitrification coupled ANAMMOX in the end. The optimal removal efficiencies of 97.69% for NH4⁺-N and 87.83% for TN were obtained in the enrichment stage (Phase 4), and the effluent concentration of NH4⁺-N and TN were 1.20 mg•L^-1and 7.03 mg•L^-1, respectively. Illumina MiSeq sequencing results showed that the enrichment of AOB including Nitrosomonas and Nitrosospira and the elimination of NOB including Nitrospira, Nitrococcus, and Nitrobacter were the main causes of achieving partial nitrification in the system. The enrichment of AnAOB including Candidatus Kuenenia and Candidatus Jettenia was the key point for the occurrence of ANAMMOX in the system, and thus, played an important role in the achievement of advanced nitrogen removal.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Nitrogen removal Controlled terms:Denitrification - Dissolved oxygen - Efficiency - Effluents - Microorganisms - Nitrification - Sewage treatment plants - Wastewater treatment Uncontrolled terms:ANAMMOX - Dissolved oxygen concentrations - Effluent concentrations - Microbial community structures - Municipal wastewater treatment plants - Nitrification and denitrification - Nitrogen removal efficiency - Removal performance Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.9 Biology - 802.2 Chemical Reactions - 913.1 Production Engineering Numerical data indexing:Age 3.84e-01yr, Mass_Density 7.03e-03kg/m3 to 2.20e-02kg/m3, Percentage 8.78e+01%, Percentage 9.77e+01% DOI:10.13227/j.hjkx.201910190 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371012 Title:Bioavailability and Influencing Factors of Soil Cd in the Major Farming Areas of Chongqing Title of translation:重庆市主要农耕区土壤Cd生物有效性及影响因素 Authors:Wang, Rui (1, 2); Hu, Xiao-Lan (1); Zhang, Yong-Wen (1, 2); Yu, Fei (1, 2); Zhu, Hai-Shan (1, 2); Li, Yu (1, 2) Author affiliation:(1) Southeast Sichuan Geological Group, Chongqing Bureau of Geology and Minerals Exploration, Chongqing; 400038, China; (2) Chongqing Key Laboratory of Land Quality Geological Survey, Chongqing; 400038, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1864-1870 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:One-hundred and fifty five large-scale crop rice and root soil samples were collected in Nanchuan District of Chongqing, and some samples of corn, potato, tomato, rapeseed, plum and kiwifruit, and root soil were collected for testing and analysis. The bioavailability of the elements was characterized by bioconcentration factors. The effects of soil physical and chemical properties, soil composition, geological background, and crop types on the bioavailability of Cd were analyzed. The results showed that there was a certain degree of Cd exceeding the standard in rice and root soil in Nanchuan District, and the bioavailability of Cd was relatively low. Soil pH was the main controlling factor of Cd bioavailability, and the bioavailability was higher under acidic conditions. Plum, kiwi, and kiwifruit have weaker ability to enrich Cd. Therefore, it is possible to prevent heavy metal pollution in the soil and improve the quality of agricultural products by artificially regulating the pH of the field or adjusting the planting structure. The method can also be applied to the research of other soil heavy metals or health elements such as Se and provides a scientific basis for the safe use of land and the production of high-quality agricultural products.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Soil testing Controlled terms:Agricultural products - Agricultural robots - Bioaccumulation - Biochemistry - Chemical analysis - Crops - Heavy metals - Soils Uncontrolled terms:Bio-concentration factors - Bioavailability - Enrichment factors - Geological background - Heavy metal pollution - Influencing factors - Main controlling factors - Soil physical and chemical properties Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801.2 Biochemistry - 821.4 Agricultural Products DOI:10.13227/j.hjkx.201910229 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008921 Title:Rapid Start-up and Stability of Partial Denitrification Based on Different Waste Sludge Sources Title of translation:基于不同废污泥源的短程反硝化快速启动及稳定性 Authors:Zhang, Xing-Xing (1); Wang, Chao-Chao (1); Wang, Yao (1); Xu, Le-Zhong (1, 2, 3); Wu, Peng (1, 2, 3) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (3) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China Corresponding author:Xu, Le-Zhong(kgre505@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3715-3724 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the feasibility of the rapid start-up of partial denitrification and the stable accumulation of NO2^--N in different waste sludge sources, three identical SBR reactors (S1, S2, and S3) were inoculated respectively with sludge discharged from a laboratory municipal wastewater denitrifying phosphorus removal system, surplus sludge from a municipal wastewater treatment plant, and river sediment sludge. The characteristics of the partial denitrification start-up and NO2^--N accumulation were compared, and the partial denitrification activity of the system or NO3^--N→NO2^--N transformation performance were investigated by analyzing the characteristics of the functional bacteria genera of the reactor from the perspective of microbiology. The results showed that all three SBR partial denitrification reactors could be launched successfully in a short time with sodium acetate as the sole carbon source, under a high alkalinity, and by using a suitable COD/NO3^--N ratio. The average NO3^--N→NO2^--N transformation ratio of the system was ranked as: S1>S2>S3 (75.92%>73.36%>69.90%). It was found that S1 and S2 had different degrees of partial denitrification performance deterioration under a continuous low temperature, but that S3 could maintain a good NO2^--N accumulation performance. High throughput sequencing showed that Proteobacteria and Bacteroidetes were dominant in the partial denitrification system, and that the abundance of Thauera was significantly different in the three PD reactors: S3>S1>S2 (25.09%>4.71%>3.60%), thus indicating that S3 had stable and efficient NO2^--N accumulation performance and that a high abundance of Thauera might play a significant role in maintaining low temperature partial denitrification activity.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Denitrification Controlled terms:Deterioration - Nitrogen oxides - Sewage treatment plants - Sodium compounds - Temperature - Waste treatment - Wastewater treatment Uncontrolled terms:Denitrification reactors - Denitrifying phosphorus removal - Functional bacteria - High-throughput sequencing - Municipal wastewater treatment plants - Municipal wastewaters - Performance deterioration - Sole carbon source Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 641.1 Thermodynamics - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 951 Materials Science DOI:10.13227/j.hjkx.202001216 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106329 Title:Effects of Eucalyptus Branches Biochar Application on Soil Physicochemical Properties of Acidified Soil in a Eucalyptus plantation in Northern Guangxi Title of translation:桉树枝条生物炭输入对桂北桉树人工林酸化土壤的作用效果 Authors:Duan, Chun-Yan (1, 2, 3); Shen, Yu-Yi (4); Xu, Guang-Ping (2, 3); Teng, Qiu-Mei (2); Zhang, De-Nan (2); He, Cheng-Xin (2, 3); Zhang, Zhong-Feng (2); Zhou, Long-Wu (2); Sun, Ying-Jie (2) Author affiliation:(1) Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Ministry of Education, Guangxi Normal University, Guilin; 541006, China; (2) Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin; 541006, China; (3) College of Life Sciences, Guangxi Normal University, Guilin; 541006, China; (4) Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin; 541006, China Corresponding author:Xu, Guang-Ping(xugpgx@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4234-4245 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study aims to explore the effects of different biochar applications on soil physical and chemical properties in a Eucalyptus plantation in Northern Guangxi, find the best biochar application amount, and provide scientific guidance for the efficient utilization of forest residue and soil improvement. The soil of a four-year Eucalyptus plantation at the Huangmian forest farm in Northern Guangxi was selected as the study area, and six treatments including 0 (CK), 0.5% (T1), 1.0% (T2), 2% (T3), 4% (T4), and 6% (T5) were set through a field-positioning experiment to analyze the changes in soil physical and chemical properties under different application rates. Compared with the 0-30 cm soil layer of the control treatment, biochar application decreased the mean soil bulk by 3.82%-33.55%, while it increased the soil natural water content, capillary porosity, and total capillary porosity by 7.67%-31.75%, 8.95%-33.19%, and 9.28%-35.86%, respectively. The contents of exchangeable acid, exchangeable aluminum, exchangeable hydrogen, and exchangeable sodium in the soil decreased by 8.28%-70.03%, 5.55%-70.34%, 5.10%-21.78%, and 12.81%-49.27%. Biochar application increased the cation exchange capacity, electrical conductivity, exchangeable magnesium, and exchangeable calcium by 27.08%-160.39%, 117.00%-546.64%, 17.10%-66.14%, and 17.38%-71.38%, respectively. Soil pH increased by 0.17-1.29 after biochar addition. Similarly, the contents of soil organic carbon, total phosphorus, total potassium, available nitrogen, available phosphorus, and available potassium increased by 10.94%-51.37%, 14.29%-59.45%, 6.48%-59.57%, 6.28%-29.41%, 4.79%-19.81%, and 7.72%-75.87%. There was a positive correlation among the main physical and chemical factors. The physical and chemical properties reached their maximum values in the T4 or T5 treatment (4% or 6%). Biochar application provided considerable relief from soil acidification in the Eucalyptus plantation and had a positive effect on soil physicochemical properties. The addition 4%-6% of ripe Eucalyptus biochar produced the optimum results. The results show that biochar can improve the physical and chemical properties of soil, increase soil fertility, and enhance the soil's ability to retain water and fertilizer after twelve months. The findings of this study can be used as a reference in practical applications for soil improvement and sustainable management of Eucalyptus plantations.
© 2020, Science Press. All right reserved. Number of references:60 Main heading:Soils Controlled terms:Chemical analysis - Chemical properties - Fertilizers - Forestry - Organic carbon - Phosphorus - Physicochemical properties - Porosity - Potassium Uncontrolled terms:Cation exchange capacities - Electrical conductivity - Eucalyptus plantations - Physical and chemical properties - Positive correlations - Soil physical and chemical properties - Soil physico-chemical properties - Sustainable management Classification code:483.1 Soils and Soil Mechanics - 549.1 Alkali Metals - 801 Chemistry - 804 Chemical Products Generally - 804.1 Organic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Percentage 1.09e+01% to 5.14e+01%, Percentage 1.28e+01% to 4.93e+01%, Percentage 1.74e+01% to 7.14e+01%, Percentage 2.71e+01% to 1.60e+02%, Percentage 3.82e+00% to 3.35e+01%, Percentage 4.00e+00%, Percentage 4.00e+00% to 6.00e+00%, Percentage 6.00e+00%, Percentage 7.67e+00% to 3.18e+01%, Percentage 7.72e+00% to 7.59e+01%, Percentage 8.28e+00% to 7.00e+01%, Percentage 9.28e+00% to 3.59e+01%, Size 0.00e+00m to 3.00e-01m DOI:10.13227/j.hjkx.202002180 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658471 Title:Effects of Simulated Acid Rain on Soil Fungi Diversity in the Transition Zone of Moso Bamboo and Broadleaf Forest Title of translation:模拟酸雨对毛竹阔叶林过渡带土壤真菌结构及其多样性的影响 Authors:Wang, Nan (1, 2); Pan, Xiao-Cheng (2); Wang, Chuan-Kuan (1); Bai, Shang-Bin (2) Author affiliation:(1) College of Forestry, Northeast Forestry University, Harbin; 150040, China; (2) Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A&F University, Hangzhou; 311300, China Corresponding author:Pan, Xiao-Cheng(pxc_zafu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2476-2484 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Acid rain is an important phenomenon in the context of global climate change, and can strongly influence forest ecology. There have been many studies on the response of plants to acid rain. However, the effect of acid rain on soil microbial communities is still largely unknown. Studying the effects of acid rain on soil microbial community structure is of great significance for predicting the interactive effects of multiple climate factors on forest ecosystems in the future. Moso bamboo (Phyllostachys edulis) is often cultivated not only for its delicious shoots and versatile culms, but also as an important biomass resource in southern China. However, with its robust growth and strong rhizomes, Moso bamboo populations have been expanding rapidly into adjacent forests. Different perturbation regimes, including disturbance caused by simulated acid rain, can have significant effects on a soil fungal community in response to Moso bamboo invasion into native broadleaf forest. To explore the effect of acid rain on a mixed forest of Moso bamboo and broadleaf soil fungi diversity, and to understand the relationship between fungal community structure and acid rain stress, a mixed forest of Moso bamboo and broadleaf (transition forest) in Zhejiang Tianmu Mountain Nature Reserve was taken as the study site, and simulated acid rain was set at different acidity according to the acid rain component of Linan in recent years. The experiment consisted of three different treatments. Three gradients of simulated acid rain treatment [pH 2.5, 4.0, and CK (lake water)] were designed to determine the effects of simulated acid rain on soil bacterial community diversity in transition forest. Soil DNA was extracted from the soils for polymerase chain reaction amplification and high-throughput sequencing to study the effects of acid rain on the fungal communities of the mixed forest of Moso bamboo and broadleaf soil. We obtained 601 287 sequences across the three types of sampling sites. Sequences were affiliated to 13 different phyla throughout the dataset. The dominant fungal groups were Ascomycota, Basidiomycota, Mortierellomycota, and Mucoromycota. Simulated acid significantly increased the number of operational taxonomic units, Ace index, and Chao1 index of fungal communities (P<0.05). The results of principal coordinates analysis (PCoA) also revealed that acid rain significantly modified the structure. The changes in soil fungal community structure were mainly related to the abundance of genera Bifiguratu, Geminibasidium, Purpureocillium, and Oidiodendron, which could be utilized as indicator species to determine changes in soil fungal community structure. Redundancy and correlation analysis showed that changes in basic physicochemical factors in the soil, such as soil pH and total nitrogen, can significantly influence the composition of the fungal community (P<0.05).
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Fungi Controlled terms:Acid rain - Bamboo - Climate change - Ecosystems - Forestry - Gene encoding - Microorganisms - Polymerase chain reaction - Population statistics - Soils Uncontrolled terms:High-throughput sequencing - Operational taxonomic units - Physico-chemical factors - Principal coordinates analysis - Soil bacterial community - Soil fungal communities - Soil microbial community - Soil microbial community structure Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 454.3 Ecology and Ecosystems - 461.9 Biology - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 811.1 Pulp and Paper DOI:10.13227/j.hjkx.201910180 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070261 Title:Photocatalytic Degradation of Rhodamine B with Micro-SiC/Graphene Composite Under Visible Light Irradiation Title of translation:微米SiC/石墨烯复合物光催化降解罗丹明B Authors:Zhu, Hong-Qing (1, 2); Yang, Bing (2); Wei, Shi-Qiang (1); Yang, Jing-Jing (2); Zhang, Jin-Zhong (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Environment and Quality Test Department, Chongqing Chemical Industry Vocational College, Chongqing; 401228, China Corresponding author:Yang, Jing-Jing(hahajing1229@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:756-762 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To develop low consumption and an environmentally friendly degradation technology for organic pollutants, micro-SiC/graphene composite materials were synthesized by photocatalytic reduction, and the composition and morphology of the prepared materials were characterized by XRD, FTIR, Raman spectroscopy, XPS, and SEM. Rhodamine B (RhB) was selected as the simulated pollutant to investigate the photocatalytic activity and stability of composite materials under visible light irradiation. The degradation mechanism was preliminarily discussed by active species capture experiments. Results show that the lives of photogenerated electron and photogenerated hole of SiC were prolonged when combined with graphene, which improved the photocatalytic activity and stability of composite materials. The degradation efficiency of RhB reached 92.7% with the composite material of SiC/graphene ratio (1: 0.8) under 60 min irradiation, and the degradation process accorded with the first-order reaction kinetic equation. The contribution of main active species for photocatalytic degradation followed with a decreasing order of photogenerated hole (h⁺), superoxide anion radical (•O2^-), photogenerated electron (e^-), and hydroxyl radical (•OH).
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Photocatalytic activity Controlled terms:Complexation - Composite materials - Degradation - Fourier transform infrared spectroscopy - Free radical reactions - Graphene - Integral equations - Irradiation - Light - Organic pollutants - Photodegradation - Reaction kinetics - Rhodamine B - Rhodium compounds - Silicon - Silicon carbide - Silicon compounds Uncontrolled terms:Degradation efficiency - Degradation mechanism - First order reactions - Photo catalytic degradation - Photocatalytic reduction - Photogenerated electrons - Superoxide anion radicals - Visible-light irradiation Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 741.1 Light/Optics - 761 Nanotechnology - 801 Chemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 921.2 Calculus - 951 Materials Science Numerical data indexing:Percentage 9.27e+01%, Time 3.60e+03s DOI:10.13227/j.hjkx.201908089 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278110 Title:Start-up of CANON Process and Short-cut Nitrification in a Pilot-scale MBBR Reactor Title of translation:中试MBBR反应器启动CANON工艺及其短程硝化 Authors:Fu, Kun-Ming (1); Yang, Zong-Yue (1); Liao, Min-Hui (1); Jin, Yi-Ran (1); Zhang, Xiao-Hang (1) Author affiliation:(1) Sino-Dutch R&D Center for Future Wastewater Treatment Technologies, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1393-1400 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Using a 150 L moving bed biofilm reactor (MBBR), with the temperature controlled at 28℃ and high NH4⁺-N concentration (average concentration 350 mg•L^-1), inorganic wastewater was used as an influent to start the completely autotrophic nitrogen removal over nitrite (CANON) process. Meanwhile, the flocculent sludge was taken into a 5 L sequencing batch reactor, and the influent NH4⁺-N concentration was maintained at 90-200 mg•L^-1 for the recovery of short-cut nitrification. The results showed that in the MBBR reactor, when the average hydraulic retention time (HRT) was 12 h, short-cut nitrification and total nitrogen (TN) removal rate were mutually constrained, the average TN removal rate was 38.2%, and the average δNO3^--N/TN value was 0.274; when the HRT dropped to 6 h, the δNO3^--N/TN value decreased from 0.347 to 0.146. The sequencing batch reactor (SBR) maintained aeration and anoxic time for 30 min and 20 min, respectively, by intermittent aeration, while the dissolved oxygen concentration during the aerobic process was 0.5 mg•L^-1 to 0.6 mg•L^-1, the free nitrous acid concentration was higher than 0.18 mg•L^-1 at the end of each cycle, NAR increased from 0 to 99.2% after 12 days, NUR decreased to 0 from an initial 24.8 mg•(g•h)^-1, and the TN removal rate decreased from 13% to 3%; the system successfully converted to short-range nitrification. High-throughput sequencing results showed that the abundance of Candidatus Kuenenia in the flocculent sludge and biofilm in the MBBR reactor were 7.91% and 17.38% respectively, Nitrosomonas accounted for 27.43% and 2.55%, respectively, while Nitrospira accounted for 0.30% and 0.28%, respectively. After the recovery of short-cut nitrification in the SBR, the abundance of ammonia-oxidizing bacteria and anaerobic ammonia oxidation decreased to 1.18% and 0.01%, respectively, and the abundance of Nitrospira increased to 1.39%.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Nitrogen removal Controlled terms:Ammonia - Anoxic water - Bacteria - Batch reactors - Biofilms - Bioreactors - Dissolved oxygen - Nitrification Uncontrolled terms:Ammonia oxidizing bacteria - Autotrophic nitrogen removal - Dissolved oxygen concentrations - Free ammonia - High-throughput sequencing - Intermittent aeration - Moving bed biofilm reactors - Sequencing batch reactors Classification code:462.5 Biomaterials (including synthetics) - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Age 3.29e-02yr, Mass_Density 1.80e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 3.50e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-04kg/m3 to 6.00e-04kg/m3, Mass_Density 9.00e-02kg/m3 to 2.00e-01kg/m3, Percentage 0.00e+00% to 9.92e+01%, Percentage 1.00e-02%, Percentage 1.18e+00%, Percentage 1.39e+00%, Percentage 1.74e+01%, Percentage 2.55e+00%, Percentage 2.74e+01%, Percentage 2.80e-01%, Percentage 3.00e-01%, Percentage 3.82e+01%, Percentage 7.91e+00%, Time 1.20e+03s, Time 1.80e+03s, Time 2.16e+04s, Time 4.32e+04s, Volume 1.50e-01m3, Volume 5.00e-03m3 DOI:10.13227/j.hjkx.201909220 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861916 Title:Temporal and Spatial Variation Patterns of the Environmental Elements in the Sediments of the Liaohe Estuary and the Related Influencing Factors Title of translation:辽河口沉积物环境要素时空动态及影响因素分析 Authors:Qi, Yue (1); Sun, Yong-Guang (1); Ma, Gong-Bo (1); Wu, Nan (1); Fu, Yuan-Bin (1) Author affiliation:(1) National Marine Environmental Monitoring Center, Dalian; 116023, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3175-3185 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Remote sensing images, field survey data, and historical monitoring data are collected to analyze the historical change trend and spatial variation rules of sediment quality of the Liaohe Estuary and further investigate the effects of sea-area utilization type and vegetation succession stage on the variation patterns of environmental elements in the sediments. The results showed that the quality of the sediments in the Liaohe Estuary is overall favorable, and the average contents of various elements all satisfy the quality standards of first-grade sediments. The nutritive elements in the sediments exhibit obvious zonal distribution patterns, while heavy metals are randomly distributed and exhibit no obvious patterns. The effect of sea-area utilization type on the enrichment of pollutants in the sediments exhibits certain significant differences, suggesting that the distributions of heavy metals and pollutants are subject to human activities and exhibit certain randomness. The main control factors are significantly different at different vegetation succession stages. Specifically, the vegetation distribution in the initial succession stage is mainly affected by salinity; with the transition from halophytic vegetation to terrestrial vegetation, the inherent correlation between vegetation distribution characteristics and the contents of total organic carbon, total nitrogen, and total phosphorus increase gradually. Meanwhile, the content of heavy-metal pollutants exhibits no significantly inherent correlation between the distributions of the plant community.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Sediments Controlled terms:Estuaries - Heavy metals - Monitoring - Organic carbon - Pollution - Remote sensing - Vegetation Uncontrolled terms:Distribution patterns - Heavy metal pollutants - Randomly distributed - Remote sensing images - Temporal and spatial variation - Terrestrial vegetation - Vegetation distribution - Vegetation successions Classification code:407.2 Waterways - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201910041 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990445 Title:Spatiotemporal Variations of PM2.5 Pollution Evolution in China in Recent 20 Years Title of translation:近20年来中国PM2.5污染演变的时空过程 Authors:Shi, Yan (1, 2, 3); Liu, Rui-Mei (1, 2); Luo, Yi (1, 2); Yang, Kun (1, 2) Author affiliation:(1) School of Information Science and Technology, Yunnan Normal University, Kunming; 650500, China; (2) GIS Technology Engineering Research Centre for West-China Resources and Environment, Ministry of Education, Yunnan Normal University, Kunming; 650500, China; (3) Information Center of Yunnan Power Grid Co., Ltd., Kunming; 650217, China Corresponding author:Luo, Yi(lysist@ynnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:1-13 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We use measured aerosol fine particulate matter (PM2.5) data, moderate resolution imaging spectroradiometer (MODIS) aerosol optical depth (AOD) data, and meteorological parameters (temperature, wind speed, wind direction, boundary layer height, and relative humidity) from the Chinese national control monitoring network, to consider seasonal and regional differences in the relationship between AOD and PM2.5. We propose a two-stage combined estimation model of PM2.5 concentrations based on the Ε-support vector regression (Ε-SVR/Epsilon-SVR) and the Mind Evolutionary Computation-BP neural network (MEC-BP) for analyzing spatiotemporal variations in PM2.5 concentrations in China between 2000 and 2017. The results showed that the two-stage combined estimation model provided a reliable estimation of the monthly ground-level PM2.5 concentrations at a spatial resolution of 1° × 1° during 2000-2017 in China. This effectively offsets the time and space gaps in the current data sets of the ground monitoring network (R²=0.838, root mean square errors (RMSE)=11.512 μg•m^-3, mean absolute percentage error (MAPE)=14.905%, mean squared percentage error (MSPE)=0.243%, mean absolute error (MAE)=6.476 μg•m^-3, mean squared error (MSE)=132.519 μg•m^-3). The preliminary spatiotemporal analysis results showed that: ① Over the period 2000-2017, 2014 represented an important demarcation point for the annual PM2.5 concentration, as its trend changed from one of continuous increase to one of rapid decrease. The PM2.5 concentration decreases more rapidly in areas with high concentrations of PM2.5 in particular, including the northern coastal area, the eastern coastal area, and the middle reaches of the Changjiang River. ② During the studied period, the annual average PM2.5 concentration exceeded the second level criterion of the Chinese national air quality standard (35 μg•m^-3) over more than 65% of China. Although the PM2.5 pollution situation in China improved to a certain extent in the latter years of the studied period, the air pollution situation remained poor.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:River pollution Controlled terms:Aerosols - Air quality - Backpropagation - Boundary layer flow - Boundary layers - Coastal zones - Errors - Humidity control - Mean square error - Radiometers - Support vector regression - Wind Uncontrolled terms:Fine particulate matter (PM2.5) - Mean absolute percentage error - Meteorological parameters - Mind evolutionary computation - Moderate resolution imaging spectroradiometer - National Air Quality Standards - Root mean square errors - Spatio-temporal variation Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 453 Water Pollution - 471 Marine Science and Oceanography - 631.1 Fluid Flow, General - 723.4 Artificial Intelligence - 922.2 Mathematical Statistics - 944.7 Radiation Measuring Instruments Numerical data indexing:Age 2.00e+01yr, Percentage 6.50e+01% DOI:10.13227/j.hjkx.201905109 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517729 Title:Distribution Characteristics of Selenium in a Soil-Crop System and the Threshold of Selenium-Rich Soils Title of translation:硒在土壤-农作物系统中的分布特征及富硒土壤阈值 Authors:Wang, Rui (1, 2); Deng, Hai (1, 2); Jia, Zhong-Min (1); Yan, Ming-Shu (1, 2); Zhou, Jiao (1, 2); He, Zhong-Xiang (1, 2); Liang, Shao-Biao (1, 2); Dong, Jin-Xiu (1, 2); Su, Li-Ming (1, 2) Author affiliation:(1) Southeast Sichuan Geological Group, Chongqing Bureau of Geology and Minerals Exploration, Chongqing; 400038, China; (2) Chongqing Key Laboratory of Land Quality Geological Survey, Chongqing; 400038, China Corresponding author:Jia, Zhong-Min(zhongminjia@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5571-5578 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to determine the distribution characteristics of Se in soil-crop systems, we carried out a study on the Se-rich soil threshold by collecting 8789 surface soils and 155 deep soils in the Qianjiang District of Chongqing City, China, and 141 corn seeds and 159 rice seeds (simultaneously collecting 141 and 159 corresponding root soil samples, respectively). We then analyzed the Se content, organic matter, S, Mn, TFe2O3, Al2O3, and K2O in soils and crops, and soil pH. We also analyzed the surface layer using geostatistical methods and the distribution characteristics of Se in deep soils using multiple regression analysis to study the factors influencing the bioavailability of Se. Based on the contents of each component of root soil and the Se contents of crops, the Se rich threshold was examined. The results showed that the high-Se soils in the study area account for 32.72% of the total area; the distribution of Se contents in the surface and deep soils is mainly controlled by the parent material, the source of soil Se is stable, and the surface enrichment is obvious. The Se-rich rates of corn and rice were 75.35% and 46.81%, respectively, and soil organic matter and S content will limit the bioavailability of Se. If the planted crop is corn, it is recommended to use 0.3 mg•kg^-1 as the Se-rich soil threshold; if the planted crop is rice, when the soil pH is ≤7.5, it is recommended to use 0.3 mg•kg^-1 as the Se-rich soil threshold, while at a soil pH>7.5, it is recommended to use 0.4 mg•kg^-1 as the threshold. Similarly, if other large crops are planted in the study area, this method can also be used to carry out a study on the proposed Se-rich soil threshold.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Soils Controlled terms:Alumina - Aluminum oxide - Biogeochemistry - Crops - Iron compounds - Manganese compounds - Organic compounds - Selenium Uncontrolled terms:Chongqing cities - Distribution characteristics - Geostatistical method - Multiple regression analysis - Parent materials - Soil organic matters - Surface enrichment - Surface layers Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 3.27e+01%, Percentage 4.68e+01%, Percentage 7.53e+01% DOI:10.13227/j.hjkx.202006113 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070639 Title:Heavy Pollution Characteristics and Assessment of PM2.5 Predicted Model Results in Beijing-Tianjin-Hebei Region and Surrounding Areas During November 23 to December 4, 2018 Title of translation:京津冀及周边区域PM2.5叠加沙尘重污染过程特征及预报效果分析 Authors:Zhu, Yuan-Yuan (1, 2); Gao, Yu-Xiao (1, 2); Chai, Wen-Xuan (1); Wang, Shuai (1); Li, Liang (1); Wang, Wei (1); Wang, Guang (1); Liu, Bing (1); Wang, Xiao-Yan (1); Li, Jian-Jun (1) Author affiliation:(1) China National Environmental Monitoring Centre, Beijing; 100012, China; (2) School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing; 100083, China Corresponding author:Gao, Yu-Xiao(gaoyx@cnemc.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:574-586 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study discusses the concentration characteristics of PM2.5and PM10, as well as pollution meteorology in large-scale and long-term heavy pollution in the Beijing-Tianjin-Hebei region and its surrounding areas from November 23 to December 4, 2018, where the primary pollutants are comprised of PM2.5 and PM10. The monitoring results obtained from ground-based and vehicle-mounted lidars, as well as the HYSPLIT-4 backward trajectory combined with meteorological factors analysis are discussed. The accuracy and uncertainty of the air quality forecast model of NAQPMS, CMAQ, and CAMx during heavy air pollution were analyzed retrospectively. The results show that PM2.5and sand dust in most cities in the south-central region contribute to severe pollution levels. The hourly peak concentrations of PM10 in Zhangjiakou, Beijing, Shijiazhuang, Handan, and Zhengzhou were 1 589, 864, 794, 738, and 766 μg•m^-3, respectively. The respective hourly peak concentrations of PM2.5were 239, 319, 387, 321, and 380 μg•m^-3. Ground static pressure field, high humidity, inversion, and other static and stable conditions, as well as sand dust transmitted from the northwest, were important pollution meteorological and weather factors. The monitoring data of ground-based lidar and vehicle-mounted lidar combined with the HYSPLIT-4 backward trajectory analysis showed that the air pollutant transmitted from the Southwest and Southeast during the heavy pollution period was primarily PM2.5. The air pollutant transmitted from the Northwest during the two sand dust processes. Moreover, the model of NAQPMS, CMAQ, and CAMx performed well in forecasting the heavy pollution process in the Beijing-Tianjin-Hebei region and its surrounding areas. However there are slight deviations for some individual cities, related to uncertainty in the meteorological model prediction, atmospheric chemical reaction mechanism, and pollution source list. Furthermore, the reduction in pollution source emissions caused by pollution emergency measures was also one of the main reasons for the overestimation.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Weather forecasting Controlled terms:Air quality - Atmospheric humidity - Dust - Meteorology - Optical radar - Predictive analytics - Sand - Trajectories - Uncertainty analysis Uncontrolled terms:Air pollution meteorology - Air quality prediction - Back trajectories - Beijing-tianjin-hebei regions - PM2.5 - Sand dusts Classification code:443 Meteorology - 443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 483.1 Soils and Soil Mechanics - 716.2 Radar Systems and Equipment - 922.1 Probability Theory DOI:10.13227/j.hjkx.201908123 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278139 Title:Analysis of Activity and Its Emissions Trend for Construction Equipment in China Title of translation:中国工程机械使用特征及其尾气排放趋势 Authors:Pang, Kai-Li (1); Zhang, Kai-Shan (1); Ma, Shuai (1); Wang, Fan (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:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1132-1142 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Emissions from non-road equipment are attracting more attention due to their increasing contribution to air pollution. Thus, an accurate estimate of emission inventory for non-road equipment is imperative for air quality management and improvement. Activity data from a large range of construction equipment were collected from multiple sources, including on-site/phone interviews and literature review, and used for further analysis to characterize its operations. Activity analysis of construction equipment included: ①activity of construction equipment by type (functionality); ②activity differences by geographical area; and ③activity differences by age. A back-propagation neural network model was developed to estimate the construction equipment population in China from 2018 to 2025. Furthermore, real-world measurements of emissions were made on 47 selected examples of construction equipment using a portable emission measurement system. Population, activity, and emission factors were then combined to develop emission inventories for construction equipment in China from 2015 to 2025. The results showed that activity of construction equipment differs by type or functionality, ranging from 1 439 to 4 332 hours per year. Furthermore, there are differences in activity by as much as three times due to geographical area differences for the same construction equipment type. In general, activity of construction equipment decreases as it ages by a rate of approximately 140 to 150 hours per year. It is estimated that CO, HC, NO, and PM2.5 emissions of construction equipment in China in 2015 were approximately 2.099, 0.462, 3.452, and 0.574 million tons, respectively. Compared to 2015, due to the slow growth of the construction equipment population, CO, HC, and PM2.5 emissions will decrease by 2.4%-33.1% and 7.1%-64.7% by 2020 and 2025, respectively, depending on pollutant. It should be noted that NO emissions appear to increase slightly for the first several years in the future, but then decrease after 2020. As increasingly stringent regulations have been enforced for on-road vehicles, but less has been done regarding non-road equipment, although total emissions from non-road equipment continue to decrease, their contribution to air pollution will continue to increase; they should therefore be one of the focuses for future work.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Construction equipment Controlled terms:Air quality - Backpropagation - Information analysis - Machinery - Population statistics - Quality management - Road vehicles - Roads and streets Uncontrolled terms:Activity analysis - Back propagation neural networks - Emission inventories - Emission measurement systems - Literature reviews - Population - Stringent regulations - Tailpipe emission Classification code:405.1 Construction Equipment - 406.2 Roads and Streets - 451.2 Air Pollution Control - 723.4 Artificial Intelligence - 903.1 Information Sources and Analysis - 912.2 Management Numerical data indexing:Percentage 2.40e+00% to 3.31e+01%, Percentage 7.10e+00% to 6.47e+01%, Time 5.04e+05s to 5.40e+05s, Time 5.18e+06s to 1.56e+07s DOI:10.13227/j.hjkx.201909174 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008910 Title:Performance of Anaerobic Membrane Bioreactors for the Co-digestion of Sewage Sludge and Food Waste Title of translation:基于厌氧膜生物反应器的剩余污泥-餐厨垃圾厌氧共消化性能 Authors:Dai, Jin-Jin (1); Niu, Cheng-Xin (1); Pan, Yang (1); Lu, Xue-Qin (1, 2); Zhen, Guang-Yin (1, 3); Zheng, Chao-Ting (1); Zhang, Rui-Liang (1); He, Xin-Yu (1) 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) Institute of Eco-Chongming, Shanghai; 200062, China; (3) Shanghai Institute of Pollution Control and Ecological Security, Shanghai; 200092, China Corresponding author:Zhen, Guang-Yin(gyzhen@des.ecnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3740-3747 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A laboratory-scale anaerobic membrane bioreactor (AnMBR) was used for the co-digestion of sewage sludge and food waste to investigate its organic matter removal characteristics, biogas production performance, and microbial community composition. The results showed that the degradation rate of volatile solids (VS) increased from 17.5% for a single digestion to 40% for the total digestion, and that the COD removal was 95.3% when the organic loading rate (OLR) was stabilized at 0.59-0.64 kg•(m³•d)^-1. The solids content of the digested sludge increased by a factor of 3.9. The final CH4 content was 60% and the CH4 yield was 78.7 mL•g^-1 of CODadded. The transmembrane pressure (TMP) and average flux were maintained at between -3.1 and -2.7 kPa and 0.106 L•(m²•h)^-1, respectively, and membrane fouling was not serious. According to an analysis of the microbial diversity using 16S rRNA, the anaerobic bacterium in the AnMBR were mainly phylum Proteobacteria, Bacteroidetes, and Cloacimonetes, and the dominant methanogens included the Methanobacterium family, Methanosaeta genus, and Methanolinea genus. This study provides a strong theoretical basis for research into the stability and performance of AnMBRs for the co-treatment of sludge and other high-solid waste streams, and provided an effective solution for biomass resource utilization and the energy crisis.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Sludge digestion Controlled terms:Anaerobic digestion - Bacteria - Bioreactors - Degradation - Energy policy - Food waste - Membrane fouling - RNA - Sewage sludge Uncontrolled terms:Anaerobic bacterium - Anaerobic membrane bioreactor - Effective solution - Microbial community composition - Microbial diversity - Organic loading rates - Organic matter removal - Transmembrane pressures Classification code:452.2 Sewage Treatment - 461.2 Biological Materials and Tissue Engineering - 461.8 Biotechnology - 525.6 Energy Policy - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 951 Materials Science Numerical data indexing:Percentage 1.75e+01%, Percentage 4.00e+01%, Percentage 6.00e+01%, Percentage 9.53e+01%, Pressure -2.70e+03Pa, Specific_Volume 7.87e-02m3/kg to 2.20e-02m3/kg DOI:10.13227/j.hjkx.202001036 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105833 Title:Spectral Characteristics and Source Analysis of WSOC of PM2.5 in Winter of Xi'an Title of translation:西安市冬季PM2.5中WSOC的光谱特性和来源解析 Authors:Yang, Yi (1, 2, 3); Zhang, Ya-Nan (1); Liu, Huan-Wu (4); Tian, Ping-Ping (4); Li, Ya-Fei (1); Lei, Ying (1); Wang, Yi-Bo (1) 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 University of Architecture and Technology, Xi'an; 710055, China; (3) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (4) Xi'an Environmental Monitoring Station, Xi'an; 710018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3924-3931 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The spectral characteristics and sources of water-soluble organic compounds (WSOC) in PM2.5 in winter were studied by using UV-vis absorption spectroscopy, three-dimensional fluorescence spectroscopy, parallel factor analysis, and backward trajectory model. The results showed that the concentration of WSOC in PM2.5 was 4.66-14.75 μg•m^-3. The values of E2/E3, E3/E4, S275-295, SUVA254, AAE, and MAE365 of WSOC were, respectively, in the range of 2.85-4.32, 2.21-3.56, 0.009 9-0.012 7 nm^-1, 2.35-3.89 m²•g^-1, 2.66-4.60, and 1.51-2.60 m²•g^-1. The E2/E3, E3/E4, S275-295, and AAE values of WSOC at the sampling site in the southern suburb of Xi'an, China (Xi'an University of Architecture and Technology) were higher than those at the sampling site in the northern suburb (sports park), while the values of SUVA254 and MAE365 were lower. There were four fluorescent components in WSOC identified by the EEMs-PARAFAC model: C1 and C2 were fulvic acid-like and protein-like, respectively, and C3 and C4 were humus-like components. The fluorescence intensities and the sum of the fluorescent components were positively correlated with the concentrations of PM2.5, OC, WSOC, and A254 value (P<0.01). The fluorescence index (FI), biological source index (BIX), and humic index (HIX) values of WSOC were 1.75-2.12, 1.14-1.46, and 1.18-2.06, respectively. During the monitoring period, the air mass transmission trajectory was dominated by the local southwest of short-distance transmission, and its trajectory accounted for more than 50%. The pollutant emissions from Xinjiang, Inner Mongolia, and Gansu also made significant contributions to the air pollution levels in Xi'an in winter. There was a small difference in the carbon component content of PM2.5 in the northern and southern suburbs of Xi'an. The molecular weight, humification degree, and light absorption capacity of WSOC at the southern suburb sampling site were lower than those in the northern suburb where the wavelength dependence of light absorption intensity was relatively stronger. The WSOC mainly originated from biological sources or both from biological and terrestrial sources. Local transmission had the most significant contribution to PM2.5 and WSOC in winter.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Fluorescence Controlled terms:Absorption spectroscopy - Fluorescence spectroscopy - Light absorption - Pollution - Soils - Trajectories - Transmissions - Ultraviolet spectroscopy - Water absorption Uncontrolled terms:Fluorescence intensities - Parallel factor analysis - Short-distance transmission - Spectral characteristics - Three-dimensional fluorescence spectroscopies - UV-Vis absorption spectroscopy - Water soluble organic compounds - Wavelength dependence Classification code:483.1 Soils and Soil Mechanics - 602.2 Mechanical Transmissions - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations Numerical data indexing:Percentage 5.00e+01%, Specific_Surface_Area 1.51e+03m2/kg to 2.60e+03m2/kg, Specific_Surface_Area 2.35e+03m2/kg to 3.89e+03m2/kg DOI:10.13227/j.hjkx.202001127 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008931 Title:Monitoring Method of Total Particulate Matter in Ultra-low-emission and High-humidity Exhaust Gas from Stationary Sources and an Actual Test in a Gas Power Plant Title of translation:超低排放高湿废气总颗粒物监测方法及燃气电厂实际测试 Authors:Hu, Yue-Qi (1); Yan, Xu (1); Kong, Chuan (1); Zhang, Hu (1); Wu, Xiao-Dong (1) Author affiliation:(1) Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology, Beijing Municipal Environmental Protection Monitoring Center, Beijing; 100048, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3563-3571 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the implementation of ultra-low-emission transformation in coal-fired power plants and other related industries in China, the concentrations of filterable particulate matter (FPM) and gaseous pollutants in exhaust gas from stationary sources have reduced significantly, while the emission of condensable particulate matter (CPM) remains a concern. In this study, the monitoring methods of FPM and CPM at a relatively low FPM concentration in exhaust gas from stationary sources in China and abroad were comprehensively analyzed. On the basis of existing research and experimental exploration, the monitoring methods of FPM and CPM were further studied. A direct condensation sampling and monitoring method for total particulate matter (TPM) in ultra-low-emission and high-humidity exhaust gas from stationary sources, which is suitable for the actual situation in China, was developed and established before being used to measure TPM in exhaust gas from a gas power plant in Beijing. The results showed that the emission concentration of TPM in the exhaust gas from the gas power plant was between 1. 98 mg•m^-3 and 3.77 mg•m^-3 (average of 2.81 mg•m^-3), whereas the average emission concentration of FPM was only 0.10 mg•m^-3. The emission type of particulate matter in exhaust gas from the gas power plant was mainly CPM, which accounted for 93.8% to 99.2% of the TPM (average of 97.0%). The proportion of FPM to TPM ranged from 0.7% to 6.2% (average of 3.0%). The emission concentration of filterable CPM was slightly higher than that of FPM.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Gases Controlled terms:Coal - Coal industry - Fog - Fossil fuel power plants - Monitoring - Particles (particulate matter) - Particulate emissions - Petroleum prospecting Uncontrolled terms:Coal-fired power plant - Condensable particulate matters - Emission concentration - Filterable particulate matter - Monitoring methods - Particulate Matter - Stationary sources - Total particulate matter Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 512.1.2 Petroleum Deposits : Development Operations - 524 Solid Fuels - 951 Materials Science Numerical data indexing:Percentage 3.00e+00%, Percentage 7.00e-01% to 6.20e+00%, Percentage 9.38e+01% to 9.92e+01%, Percentage 9.70e+01% DOI:10.13227/j.hjkx.201911227 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008948 Title:Analysis of Rainfall Runoff Pollution and Pollution Load Estimation for Urban Communities in a Highly Urbanized Region Title of translation:高度城镇化地区城市小区降雨径流污染特征及负荷估算 Authors:Gao, Bin (1); Xu, You-Peng (1); Lu, Miao (1); Lin, Zhi-Xin (1); Xu, Xing (2) Author affiliation:(1) School of Geography and Ocean Science, Nanjing University, Nanjing; 210023, China; (2) Wuxi Branch of Hydrology and Water Resources Survey Bureau of Jiangsu Province, Wuxi; 214031, China Corresponding author:Xu, You-Peng(xypnju@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3657-3664 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Taihu Lake plain is a highly urbanized region in China with many water-related environmental problems. Although point-source pollution has been effectively controlled by government legislation, urban surface runoff pollution is still a major issue. Different types of urban communities were selected for rainfall runoff experiments. According to the monitoring data of rainfall events, multiple methods were used to analyze the characteristics of surface runoff pollution and estimate the pollution load for different types of communities. The results indicated that surface runoff from urban communities reduced the river water quality. Certain degrees of the 'first flush' effect occurred in different types of urban communities. The surface runoff pollution in the commercial residential community was weaker than that in commercial and private residential communities; however, the first flush occurred more frequently in the commercial residential community. Holding back 30% of the surface runoff could effectively improve the runoff water quality in commercial and private residential communities as well as the commercial residential community with restaurants. In the commercial residential community, 25% of surface runoff should be held to improve runoff water quality effectively. The loads of pollutants, especially nitrogen and phosphorus, in urban communities in the Taihu Lake basin were higher than those in other regions in China. This research can assist with the reduction of surface runoff pollution in highly urbanized communities.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:River pollution Controlled terms:Housing - Lakes - Rain - Runoff - Water quality Uncontrolled terms:Environmental problems - Government legislations - Multiple methods - Nitrogen and phosphorus - Point source pollution - Residential communities - River water quality - Taihu Lake basin Classification code:403.1 Urban Planning and Development - 442.1 Flood Control - 443.3 Precipitation - 445.2 Water Analysis - 453 Water Pollution Numerical data indexing:Percentage 2.50e+01%, Percentage 3.00e+01% DOI:10.13227/j.hjkx.201909250 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105517 Title:Component Characteristics and Source Appointment of Volatile Organic Compounds in Lianyungang City Title of translation:连云港市挥发性有机化合物的组分特征及来源解析 Authors:Cui, Jin-Meng (1); Wang, Ti-Jian (1); Li, Qiu-Tong (2); Dong, Li-Wen (2); Huang, Cong-Wu (1); Cao, Yun-Qing (1) Author affiliation:(1) School of Atmospheric Sciences, Nanjing University, Nanjing; 210023, China; (2) Lianyungang Ecology and Environment Agency, Lianyungang; 222001, China Corresponding author:Wang, Ti-Jian(tjwang@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3941-3950 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 particulate matter; thus, their impacts on air quality are particularly significant. To study the composition characteristics and sources of VOCs in Lianyungang City, four national control sites were selected to conduct VOCs sampling and analysis on typical days in spring, summer, and autumn. Concentrations of VOCs, the effects of different components of VOCs on ozone formation were quantified, and the sources of VOCs were analyzed using the Positive Matrix Factorization model. The VOC concentrations were in the range of 27.46×10^-9-40.52×10^-9 in spring, 45.79×10^-9-53.45×10^-9 in summer, and 38.84×10^-9-46.66×10^-9 in autumn. Concentrations of oxygenated compounds accounted for 41%-48% of all measured VOCs. VOC species with higher concentrations were acetone, acrolein, and propionaldehyde, and the concentration of isoprene was higher in summer. Generally, VOC concentrations were higher at 09:00 than at 13:00 when acrolein, ethylene, and dichloromethane concentrations changed greatly. The ozone formation potential (OFP) of oxygenated compounds was the highest, followed by aromatics and alkenes, and the OFP of alkanes was the smallest. The VOC species with higher OFP were acrolein, propylene, and ethylene. The main sources of VOCs in Lianyungang were industry (49%), solvent usage (23%), transportation (14%), paint usage (10%), and natural sources (4%). The results suggest further investigating the oxygenated compounds with higher concentrations and higher OFP in Lianyungang City, and studying the impacts of industrial sources on VOCs.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Ozone Controlled terms:Acetone - Air quality - Aldehydes - Aliphatic compounds - Dichloromethane - Ethylene - Factorization - Herbicides - Springs (components) - Volatile organic compounds Uncontrolled terms:Component characteristics - Composition characteristics - Industrial sources - Lianyungang cities - Oxygenated compounds - Ozone formation potentials - Particulate Matter - Positive matrix factorization models Classification code:451.2 Air Pollution Control - 601.2 Machine Components - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.00e+01%, Percentage 1.40e+01%, Percentage 2.30e+01%, Percentage 4.00e+00%, Percentage 4.10e+01% to 4.80e+01%, Percentage 4.90e+01% DOI:10.13227/j.hjkx.201912209 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105142 Title:Start-up and Optimization of Denitrifying Phosphorus Removal in ABR-MBR Coupling Process Title of translation:ABR-MBR耦合工艺启动及优化反硝化除磷性能 Authors:Miao, Xin-Nian (1); Wang, Qian (1); Guo, Kai-Cheng (1); Liu, Wen-Ru (1, 2, 3); Shen, Yao-Liang (1, 2, 3, 4) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China; (3) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (4) Key Laboratory of Environmental Science and Engineering of Jiangsu Province, Suzhou; 215009, China Corresponding author:Shen, Yao-Liang(ylshen@mail.usts.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4150-4160 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The feasibility of the denitrifying phosphorus removal process in the ABR-MBR system with no sludge reflux and high concentration of seeding activated sludge (25 g•L^-1, in MLSS) in the ABR was investigated. The characteristics of the microbial community in the denitrifying phosphorus removal compartment were also evaluated. The denitrifying phosphorus removal function was achieved by gradually increasing the reflux ratio (R) from 0% to 200%. During the stable operation, the average removal rates of COD, PO4^3--P, and TN in the system were 88.28%, 54.45%, and 61.93%, respectively. When the influent loading rate, NOx^--N reflux ratio, and hydraulic retention time (HRT) of ABR and MBR were 0.8 kg•(m³•d)^-1, 150%, and 9 h and 3.3 h, respectively, the average VFA concentration of 80.58 mg•L^-1, ρ(NO2^--N)/ρ(NO3^--N) reflux ratio of 1.68, and PO4^3--P and TN removal rates of 64.94% and 62.95% were obtained. The short-cut nitrification denitrifying phosphorus removal was achieved in the ABR-MBR system. Batch tests showed that denitrifying phosphorus removal bacteria (DPAOs) were the main functional bacteria in the ABR, with anaerobic phosphorus release and anoxic phosphorus uptake of 3.73 mg•L^-1 and 10.22 mg•L^-1, respectively. High throughput sequencing results showed that Proteobacteria and Bacteroidetes were the dominant phyla in the phosphorus removal compartment, accounting for 23.49%-53.66% and 16.55%-21.78% of the total phyla, respectively. Thauera, Thiothrix, Pseudomonas, norank_ f_Rhodocyclaceae, and unclassification_ f_Rhodocyclaceae in Proteobacteria, and Sphingobacteriales in Bacteroidetes were the potential denitrifying phosphorus removal microorganisms.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Phosphorus Controlled terms:Activated sludge process - Anoxic water - Bacteria - Denitrification - Nitrogen oxides Uncontrolled terms:Anoxic phosphorus uptake - Denitrifying phosphorus removal - Functional bacteria - High-throughput sequencing - Hydraulic retention time - Microbial communities - Phosphorus release - Phosphorus removal Classification code:452.2 Sewage Treatment - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 1.02e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 2.50e+01kg/m3 to 2.20e-02kg/m3, Mass_Density 3.73e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 8.06e-02kg/m3 to 2.20e-02kg/m3, Percentage 0.00e+00% to 2.00e+02%, Percentage 1.50e+02%, Percentage 1.66e+01% to 2.18e+01%, Percentage 2.35e+01% to 5.37e+01%, Percentage 5.45e+01%, Percentage 6.19e+01%, Percentage 6.30e+01%, Percentage 6.49e+01%, Percentage 8.83e+01%, Time 1.19e+04s, Time 3.24e+04s DOI:10.13227/j.hjkx.202002124 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256498 Title:Influence of Pervious/Impervious Pattern on Runoff and Pollution in Parcel-based Catchment Title of translation:透水/不透水格局特征对汇水单元径流污染的影响 Authors:Jiang, Zhi-Hui (1, 2); Liao, Yun-Jie (2); Xie, Wen-Xia (1); Li, Jia (1, 2); Fang, Zhi-Da (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 Corresponding author:Zhao, Hong-Tao(htzhao@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4599-4606 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Determining the influence of pervious/impervious underlying surface pattern (composition, position, proportion, etc.) on the generation capacity of surface runoff and pollution in the urban parcel-based catchment could aid in alleviating the urban waterlogging and control non-point source pollution significantly. Landscape metrics were used to analyze the relationship between the characteristics of pervious/impervious underlying surface pattern and total runoff (Q) and the cumulative load of dissolved pollutants (Ld) and particulate pollutants (Lp). The results showed that: ① For the metrics of fragmentation, the patch density (PD) was positively correlated with Q and Ld. and largest patch index (LPI) was negatively correlated with them. Especially, the PD exhibited a significantly positive correlation with Ld(r=0.59, P<0.05, calculated in COD). However, the LPI exhibited a significantly negative correlation with Ld (r=-0.60, P<0.05, calculated in COD). ② For the metrics of complexity, landscape shape index (LSI) was positively correlated with Q and Lp, and mean shape index (MSI) was negatively correlated with them. Especially, the LSI exhibited a significantly positive correlation with Lp (r=0.61, P<0.05, calculated in TP) significantly. However, the MSI exhibited a significantly negative correlation with Lp (r=-0.62, P<0.01, calculated in TP) significantly. ③ For the metrics of vergence, the split index (SPLIT) was positively correlated with Q and Ld, and the cohesion index (COHESION) was negatively correlated with them. The COHESION exhibited a significantly negative correlation with Ld(r=-0.59, P<0.05, calculated in COD), whereas the SPLIT exhibited a significantly positive correlation with Ld (r=0.6, P<0.05, calculated in COD). ④ In the planning on the distribution and pattern of pervious surface under small-scale catchment, it is suggested that the scattered small-regular patches should be transformed to large-irregular patches or patch group. The relationship of the fragmentation, complexity, and vergence of pervious/impervious surface, with the runoff generation, and pollution output in parcel-based catchment was analyzed, which provided a new method for rainfall runoff and pollution control by considering rational allocation of LID facilities in terms of its pattern characteristics (area, distance, shape, etc.).
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Pollution control Controlled terms:Catchments - LSI circuits - Runoff - Textile printing - Water pollution Uncontrolled terms:Generation capacity - Largest patch indices - Negative correlation - Non-point source pollution - Pattern characteristic - Pervious surfaces - Positive correlations - Underlying surface Classification code:442.1 Flood Control - 453 Water Pollution - 714.2 Semiconductor Devices and Integrated Circuits - 819.5 Textile Products and Processing DOI:10.13227/j.hjkx.202003221 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658192 Title:Effect of Fertilizer Reduction and Biochar Application on Soil Nitrogen Loss in Purple Upland Title of translation:生物炭施用对紫色土旱坡地土壤氮流失形态及通量的影响 Authors:Wang, Shu (1); Wang, Zi-Fang (1); Long, Yi (2); Yan, Dong-Chun (2); Ci, En (1); Xu, Guo-Xin (1); Li, Jiao (1); Gao, Ming (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:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2406-2415 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study seeks to clarify the effect of biochar application on nitrogen loss patterns and flux in purple arid sloping land, so as to provide a scientific basis for improving the quality of farmland and reducing the risk of agricultural non-point source pollution in purple arid sloping land. The effects of four treatments on surface runoff and soil nitrogen loss patterns and fluxes in purple arid sloping land were studied by field experiments, including no fertilization (control), conventional fertilization, optimized fertilization, and biochar (fertilizer reduction and biochar application). The results showed that:① Of the fertilization treatments, the total runoff of conventional treatment was the highest at 16 133 L•a^-1, and the total runoff of biochar treatment was the lowest at 11 893 L•a^-1. In each fertilization treatment, soil midstream was the main mode of runoff, accounting for 61.80%-68.60% of the total loss. Compared with the control (no fertilization treatment), the sediment loss in other fertilization treatments was decreased, with conventional treatment showing the most significant effect. ② Ammonium nitrogen is mainly lost by surface runoff, accounting for 86.51%-96.58% of the total loss flux. Biochar treatment had the highest loss flux at 0.69 kg•(hm²•a)^-1, and the control treatment had the lowest at 0.17 kg•(hm²•a)^-1. ③ The concentration of granular nitrogen in the production flow of each fertilization treatment was higher than that of the control treatment, and the loss flux of granular nitrogen in the conventional fertilization treatment was the highest at 2.87 kg•(hm²•a)^-1. ④ There was a significant positive correlation between total nitrogen concentration and nitrate nitrogen concentration in the soil midstream and surface runoff of each fertilization treatment (P<0.01). Nitrate nitrogen is the main form of total nitrogen loss, and both take soil midstream as the main way of loss. The total nitrogen loss through soil flow accounted for 72.86%-89.13%, and that of conventional fertilization was the highest at 35.58 kg•(hm²•a)^-1, whereas that of biochar treatment was the lowest at 21.49 kg•(hm²•a)^-1. Reducing the amount of fertilizer and applying biochar can significantly reduce the runoff and nitrogen flux, and effectively prevent and control the risk of agricultural non-point source pollution.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Agricultural runoff Controlled terms:Agricultural robots - Agriculture - Nitrates - Nitrogen fertilizers - Pollution control - Soils Uncontrolled terms:Agricultural non-point source pollutions - Ammonium nitrogen - Control treatments - Conventional treatments - Field experiment - Nitrate nitrogen - Positive correlations - Production flows Classification code:483.1 Soils and Soil Mechanics - 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 6.18e+01% to 6.86e+01%, Percentage 7.29e+01% to 8.91e+01%, Percentage 8.65e+01% to 9.66e+01% DOI:10.13227/j.hjkx.201911056 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256405 Title:Characteristics of Water-soluble Inorganic Ions in PM2.5 in Beijing During 2017-2018 Title of translation:2017~2018年北京大气PM2.5中水溶性无机离子特征 Authors:Li, Huan (1); Tang, Gui-Qian (2); Zhang, Jun-Ke (1); Liu, Qin (1); Yan, Guang-Xuan (3); Cheng, Meng-Tian (2); Gao, Wen-Kang (2); Wang, Ying-Hong (2); Wang, Yue-Si (2) Author affiliation:(1) Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu; 611756, China; (2) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (3) Henan Key Laboratory of Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China Corresponding author:Zhang, Jun-Ke(zhangjunke@home.swjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4364-4373 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the characteristics of water-soluble inorganic ions (WSIIs) in PM2.5 during the process of continuous improvement of air quality in Beijing in recent years, a continuous collection of PM2.5 sample campaign was conducted in Beijing from 2017 to 2018. The PM2.5 mass concentration and WSIIs were then determined. The results showed that the average concentration of PM2.5 in Beijing was (77.1±52.1) μg•m^-3, with the highest and lowest values during spring [(102.9±69.1) μg•m^-3]and summer [(54.7±19.9) μg•m^-3], respectively. The average concentration of WSIIs was (31.7±30.1) μg•m^-3, accounting for 41.1% of the PM2.5 mass, and the seasonal contributions were: autumn (45.9%)>summer (41.9%)>spring (39.9%)≥winter (39.2%). SNA was an important component of the WSIIs that accounted for 86.0%, 89.5%, 74.6%, and 73.0% of the total WSIIs during spring, summer, autumn, and winter, respectively. With an increase in temperature, the concentration of NO3^- increased initially and then decreased, while the concentration of SO4^2- increased. When the relative humidity was less than 90%, the concentrations of both NO3^- and SO4^2- increased with an increase in relative humidity. With the aggravation of pollution, the overall contribution of WSIIs in PM2.5 increased significantly, and the evolution characteristics of different ions were different. Among them, the concentration and contribution of NO3^- continued to increase, while the contributions of SO4^2- and the ions from dust (Mg²⁺, Ca²⁺, and Na⁺) decreased. During the observation period, the primary sources of WSIIs were secondary conversion, combustion source, and dust. The control of coal combustion and motor vehicles is critical to reduce the emission of WSIIs. The backward trajectory analysis showed that the air masses from the south and west of Beijing corresponded to the high PM2.5 concentration and proportion of WSIIs, and the contribution of secondary ions was significant. However, the concentrations and proportions of the air masses from the northwest and north were relatively low, but the contribution of Ca²⁺ was high.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Coal combustion Controlled terms:Air quality - Dust - Ions - Springs (components) Uncontrolled terms:Average concentration - Backward trajectory analysis - Combustion sources - Continuous improvements - Evolution characteristics - Observation Period - PM2.5 concentration - Water soluble inorganic ions Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 601.2 Machine Components Numerical data indexing:Percentage 3.92e+01%, Percentage 3.99e+01%, Percentage 4.11e+01%, Percentage 4.19e+01%, Percentage 4.59e+01%, Percentage 7.30e+01%, Percentage 7.46e+01%, Percentage 8.60e+01%, Percentage 8.95e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202003303 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990456 Title:Occurrence and Risk Assessment of Organophosphate Esters in Source Water of the Nanjing Section of the Yangtze River Title of translation:长江南京段水源水中有机磷酸酯的污染特征与风险评估 Authors:Li, Dong (1, 2); Zhang, Sheng-Hu (2); Zhang, Qian (2); Wang, Bo (2); Pu, Yuan-Qing (2); Zhao, Xin (2); Li, Hui (3); Song, Ning-Hui (2); Guo, Rui-Xin (1) Author affiliation:(1) School of Engineering, China Pharmaceutical University, Nanjing; 211198, China; (2) Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing; 210042, China; (3) Beijing Larkworld Environmental Technology Incorporated Company, Beijing; 100045, China Corresponding author:Song, Ning-Hui(Snh@nies.orgemailgrxcpu@163.com)Guo, Rui-Xin(grxcpu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:205-212 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We explored the pollution characteristics, spatial and temporal distribution, ecological risk, and human health risk of organophosphate esters (OPEs) in the source water of the Nanjing section of the Yangtze River. Thirteen OPEs were determined by solid phase extraction-high performance liquid chromatography-tandem mass spectrometry. The results showed that twelve OPEs were detected to different extents with total concentrations ranging from 85.21 to 1 557.96 ng•L^-1[excluding tris (2,3-dibromopropyl) phosphate]. Chloroalkyl phosphate was the main compound and tris(2-chloroethyl) phosphate (TCEP) was the most abundant of the thirteen OPEs, which reached up to 447.08 ng•L^-1. Seasonal variation of OPEs showed that the concentrations of OPEs in summer ranged from 220-1557.96 ng•L^-1, with the average concentration of 493.78 ng•L^-1 being 1.7-2.6 times higher than of that in spring and autumn. An ecological risk assessment showed that tricresyl phosphate and 2-ethylhexyl diphenyl phosphate were associated with moderate or high risks to organisms (algae, crustaceans, and fish). At a high exposure concentration, the total non-carcinogenic risk of OPEs in source water ranged from 4.41×10^-3-2.91×10^-2, with the highest risk being associated with children aged 0-3 months. The total cancer risk value was 5.88×10^-7-3.89×10^-6, among which TCEP and Tris(1,3-dichloro-2-propyl) phosphate was associated with a potential risk for children. We conclude that the long-term exposure risk for children of OPEs in the source water of the Nanjing section of the Yangtze River deserve more attention.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Risk assessment Controlled terms:Esters - Health risks - High performance liquid chromatography - Mass spectrometry - Phase separation - Plasticizers - River pollution - Rivers Uncontrolled terms:Ecological risk assessment - High-performance liquid chromatography tandem mass spectrometries - Organophosphate esters - Solid-phase extraction - Spatial and temporal distribution - Tris(1 ,3-dichloro-2-propyl) phosphate - Tris(2 ,3-dibromopropyl)-phosphate - Tris(2-chloroethyl) phosphate Classification code:453 Water Pollution - 461.7 Health Care - 641.1 Thermodynamics - 801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Age 0.00e+00yr to 2.50e-01yr, Mass_Density 2.20e-07kg/m3 to 1.56e-06kg/m3, Mass_Density 4.47e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 4.94e-07kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201907149 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658201 Title:Vertical Distribution Characteristics of Dissolved Oxygen and Chlorophyll a in Typical Tributaries During the Impoundment Period of the Three Gorges Reservoir Title of translation:三峡水库汛后蓄水期典型支流溶解氧与叶绿素a垂向分布特征 Authors:Yang, Fan (1); Ji, Dao-Bin (1); Wang, Li-Jing (2); Li, Hong (2); Li, Ying-Jie (2) Author affiliation:(1) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Eco-Environment Research Center of Yangtze River Economic Belt, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Wang, Li-Jing(wanglj@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2107-2115 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The water quality of the backwater areas in the Xiangxi River and Shennong River, which are typical tributaries of the Three Gorges Reservoir, was monitored in September 2018. The vertical distribution characteristics of dissolved oxygen, chlorophyll a, and other indicators in the two rivers were analyzed and compared, and the environmental factors affecting their vertical distribution were discussed. The results showed that the dissolved oxygen concentration 0-10 m and 0-12 m from the surface of the Xiangxi River and Shennong River, respectively, showed significant stratification and decreased with increasing water depth. The dissolved oxygen saturation of surface water was 139.20% and 107.78%, respectively, reaching a state of supersaturation (SDO>100%).The dissolved oxygen concentration in the middle and bottom water was more stable without stratification. The vertical distribution characteristics of chlorophyll a were consistent with those of dissolved oxygen in the Xiangxi River and Shennong River, and the chlorophyll a concentration in the surface water showed moderate eutrophication (5μg•L^-1-1). According to Pearson correlation analysis, the vertical distribution of dissolved oxygen in the Xiangxi River and Shennong River was significantly correlated with that of water temperature and phytoplankton. The stratification of water temperature and the life activities of phytoplankton were the key factors affecting the vertical distribution of dissolved oxygen. Chlorophyll a was positively correlated with water temperature and pH, and negatively correlated with turbidity, indicating that the vertical distribution of phytoplankton was mainly affected by the attenuation of light intensity along the water depth and the stratification of water temperature.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Dissolved oxygen Controlled terms:Biochemical oxygen demand - Chlorophyll - Correlation methods - Dissolution - Eutrophication - Phytoplankton - Reservoirs (water) - River pollution - Rivers - Supersaturation - Temperature - Water quality Uncontrolled terms:Chlorophyll-a concentration - Dissolved oxygen concentrations - Dissolved oxygen saturation - Environmental factors - Pearson correlation analysis - Three gorges reservoir - Vertical distributions - Water temperatures Classification code:441.2 Reservoirs - 445.2 Water Analysis - 453 Water Pollution - 471 Marine Science and Oceanography - 641.1 Thermodynamics - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.08e+02%, Percentage 1.39e+02%, Size 0.00e+00m to 1.00e+01m, Size 0.00e+00m to 1.20e+01m DOI:10.13227/j.hjkx.201909026 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952743 Title:Sources and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons in the Jiaxing River Network Title of translation:嘉兴市城市河网区多环芳烃污染源解析及生态风险评价 Authors:Yang, Yan-Mei (1); Zhao, Hang-Chen (1, 2); Meng, Rui (2); He, Lian-Sheng (2); Zhao, Hao (2, 3); Du, Shi-Lin (2); Ding, Ting-Ting (2) Author affiliation:(1) School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Environmental Analysis Technology Test Center, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) School of Construction Engineering, North China University of Science and Technology, Tangshan; 063000, China Corresponding author:Meng, Rui(815243@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4989-4998 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to study the pollution source and ecological risk assessment of polycyclic aromatic hydrocarbons (PAHs) in the Jiaxing river network, PAHs were analyzed by GC-MS. The results show that with the influence of rainfall and surface runoff in the wet season, the types and mass concentrations of PAHs in the river network of Jiaxing differ from the dry season. Ten and 16 priority PAHs were detected in the dry season and wet season, respectively. The average mass concentration of PAHs in the dry season was 143.83ng•L^-1 and 73.47ng•L^-1in the wet season. The range of mass concentration of PAHs in the dry and wet season was 77.32-283.76ng•L^-1 and 13.05-133.02ng•L^-1, respectively, and 2-ring and 3-ring PAHs accounted for 79.18% in the dry season and 73.60% in the wet season. PAHs pollution in the river network of Jiaxing was at a low level compared with the domestic and foreign areas. The isomer ratio and principal component analysis found that the PAHs in the Jiaxing river network mainly come from urban non-point source pollution, combustion source, and traffic pollution in the dry season and wet season. The results of the Kalf risk entropy method show that in the dry season, naphthalene(Nap), acenaphthylene(Acy), acenaphthene(Ace), fluorene(Flu), phenanthrene(Phe), anthracene(Ant), fluoranthene(Fla), pyrene(Pyr), and benzo(a)anthracene(BaA) are at moderate ecological risk. In the wet season, Nap, Acy, Flu, Phe, Fla, Pyr, BaA, benzo(b)fluoranthene(BbF), benzo(k)fluoranthene(BkF), benzo(a)pyrene(BaP), indeno(1, 2, 3-cd)pyrene(InP), and benzo(g, h, i)perylene(BghiP) are at moderate ecological risk. In the dry season, ΣPAHs are at moderate ecological risk, and low in the wet season. On the whole, PAHs pollution in the Jiaxing river network presents moderate ecological risk levels, and measures to reduce the ecological risk of PAHs in the river network should be taken by the Departments concerned.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:River pollution Controlled terms:Anthracene - Drought - III-V semiconductors - Indium phosphide - Mineral oils - Naphthalene - Pyrene - Risk assessment - Rivers - Semiconducting indium phosphide Uncontrolled terms:Benzo(b)fluoranthene - Combustion sources - Dry and wet seasons - Ecological risk assessment - Mass concentration - Non-point source pollution - Polycyclic aromatic hydrocarbons (PAHS) - Traffic pollution Classification code:444 Water Resources - 453 Water Pollution - 513.3 Petroleum Products - 712.1.2 Compound Semiconducting Materials - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.31e-08kg/m3 to 1.33e-07kg/m3, Mass_Density 1.44e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 7.73e-08kg/m3 to 2.84e-07kg/m3, Percentage 7.36e+01%, Percentage 7.92e+01% DOI:10.13227/j.hjkx.202003134 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952730 Title:Contribution of Emissions from Cement to Air Quality in China Title of translation:中国水泥排放清单及分布特征 Authors:Tang, Ling (1, 2); Xue, Xiao-Da (1, 3); Bo, Xin (3); Guo, Jing (1, 3); Wang, Peng (3, 4); Zhai, Wen-Hui (4); Cui, Wei-Geng (5); Wang, Shou-Yang (6, 7); Li, Shi-Bei (3); Dong, Guang-Xia (8) Author affiliation:(1) School of Economics and Management, Beihang University, Beijing; 100191, China; (2) School of Economics and Management, Beijing University of Chemical Technology, Beijing; 100029, China; (3) Appraisal Center for Environment and Engineering, Ministry of Ecology and Environment, Beijing; 100012, China; (4) College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing; 100029, China; (5) School of Earth Sciences and Resources, Chang'an University, Xi'an; 710054, China; (6) School of Economics and Management, University of Chinese Academy of Sciences, Beijing; 100190, China; (7) Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing; 100190, China; (8) China National Environmental Monitoring Centre, Beijing; 100012, China Corresponding author:Bo, Xin(boxinet@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4776-4785 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study analyzed the concentrations of exhaust gas in the process (kiln head and kiln tail) of China's cement industry, based on data from continuous emission monitoring systems network in 2018. The cement emission inventory for China with high resolution (high resolution cement emission inventory for China, HCEC), using the bottom-up approach, was established. The results indicated that during 2018, the total emissions of PM, SO2, and NOx were 72 893, 92 568, and 878 394 t, respectively. In terms of temporal evolution, the exhaust concentration of flue gas in the main process gradually decreased, with obvious emission reduction from the Blue Sky Protection Campaign. Regionally, the exhaust concentrations of flue gas of the kiln head and kiln tail in Beijing-Tianjin-Hebei and surrounding areas, and the Yangtze River Delta and Fenwei Plain, showed a considerable decline, with a high to average level in China. The flu concentrations of each city differed; the cement industry in Anhui Province generated the largest emission in the country, while Beijing and Tianjin showed the highest emission intensity per unit area.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Cement industry Controlled terms:Air quality - Cements - Emission control - Flue gases - Kilns - Monitoring - Sulfur dioxide Uncontrolled terms:Bottom up approach - Continuous emission monitoring system - Emission intensity - Emission inventories - Emission reduction - High resolution - Temporal evolution - Yangtze river delta Classification code:412.1 Cement - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 642.2 Industrial Furnaces and Components - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202003171 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952733 Title:Seasonal Chemical Composition Characteristics and Source Apportionment of PM2.5 in Zhengzhou Title of translation:郑州市PM2.5化学组分的季节变化特征及来源解析 Authors:Zhang, Jian-Fei (1, 2); Jiang, Nan (2, 3); Duan, Shi-Guang (2); Sun, You-Chang (1, 2); Hao, Qi (1, 2); Zhang, Rui-Qin (2, 3) Author affiliation:(1) College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Research Institute of Environmental Science, Zhengzhou University, Zhengzhou; 450001, China; (3) School of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Jiang, Nan(jiangn@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4813-4824 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The aim of this study was to fully understand the pollution characteristics and sources of PM2.5 in Zhengzhou, and to investigate the differences in four seasons and between urban and suburban areas. At the Zhengzhou environmental monitoring center (urban areas) and Zhengzhou University (suburban areas), 1284 environmental PM2.5 samples were collected in the four seasons of 2018. The concentrations of nine kinds of inorganic water-soluble ions, organic carbon, elemental carbon and 27 kinds of elements, were measured by ion chromatography, carbon analyzer, and X-ray fluorescence spectrometry, respectively. Enrichment factors (EF), index of geoaccumulation (Igeo), potential ecological risk index (RI), chemical mass balance model (CMB), backward trajectory, and potential source contribution function were the methods used to study the chemical component characteristics and source differences of PM2.5 in different seasons in the urban and suburban areas of Zhengzhou. The results showed that the annual average PM2.5 concentration at the Zhengzhou environmental monitoring center and Zhengzhou University sites reached (59.7±24.0) μg•m^-3 and (74.7±13.5) μg•m^-3, respectively. The PM2.5 concentration at the suburban point was higher than at the urban point with the exception of winter, and the seasonal mean concentration decreased in the order of winter>autumn>spring>summer. Compared with the urban areas, the suburban areas were more affected by crustal substances in spring, and the concentrations of all components were higher in summer and autumn than the urban areas. Nevertheless, urban areas were more affected by coal burning sources and motor vehicle sources in winter. The component analysis results showed that the influences of soil dust and building dust were greater in the suburbs in spring than in the urban areas. In autumn, the suburbs were more affected by biomass sources than the urban areas, while the urban areas were more affected by building dust than were the suburbs. The concentrations of Cu, As, Zn, Pb, and Sb were strongly influenced by anthropogenic sources, and the enrichments of Zn, Cu, As, and Pb in urban areas were greater than in the suburbs. In addition, Zn, Cu, As, and Pb exhibited potential ecological risks. The outcomes of the CMB model showed that dust sources, secondary sulfate, secondary nitrate, and coal burning sources contributed significantly to PM2.5 concentrations in spring, summer, autumn and winter, respectively. The contributions of secondary pollution sources (secondary organic aerosol, secondary sulfate, and secondary nitrate) and motor vehicle sources to urban areas were higher than to suburban areas, and the influences of biomass sources in autumn and winter were significantly higher than in spring and summer and urban areas. The backward trajectory results indicated that the local PM2.5 concentration was affected by distant transmission from the northwest except in summer, was affected by neighboring provinces in the east in four seasons, and was affected by transmission from the south, with the exception of winter. Furthermore, the consequences of potential sources demonstrated that the local PM2.5 concentration was mainly affected by the potential areas in Henan province and its boundary with neighboring provinces.
© 2020, Science Press. All right reserved. Number of references:66 Main heading:Air pollution Controlled terms:Coal dust - Fluorescence spectroscopy - Ion chromatography - Lead - Nitrates - Organic carbon - Springs (components) - Sulfur compounds - Transmissions Uncontrolled terms:Chemical mass balance model - Environmental Monitoring - Index of Geo accumulations - Potential ecological risk - Potential source contribution function - Secondary organic aerosols - Urban and suburban areas - X ray fluorescence spectrometry Classification code:451 Air Pollution - 503 Mines and Mining, Coal - 524 Solid Fuels - 546.1 Lead and Alloys - 601.2 Machine Components - 602.2 Mechanical Transmissions - 741.3 Optical Devices and Systems - 801 Chemistry - 804.1 Organic Compounds - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202004099 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953220 Title:Characteristics of Organic Matter in Sediments During the Thermal Stratification of a Reservoir and Effects on an Aerobic Denitrifier Title of translation:水库热分层期沉积物中有机物特性及对好氧反硝化细菌脱氮的影响 Authors:Wang, Tong (1, 2); Wen, Gang (1, 2); Huang, Ting-Lin (1, 2); Si, Fan (1, 2); Wang, Chen-Xu (1, 2); Lu, Lin-Chao (1, 2); Lin, Wei (1, 2) Author affiliation:(1) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Wen, Gang(hitwengang@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5027-5036 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the relative molecular weight distribution and fluorescent characteristics of the organic matter in sediments during the thermal stratification of a drinking water reservoir were studied. The nitrogen removal, growth performance, and carbon removal ability of an aerobic denitrifier were investigated when the organic matter in sediments was used as a carbon source. The results found that: (1) during the stratification period in the drinking water reservoir, the organic matter in sediments has a larger proportion of relative molecular mass>100×10³. It can be observed that compared with the relative molecular weight distribution in different months, the percentage of macromolecular organic matter in sediments is the lowest in July (44.62%), showing a characteristic of smaller relative molecular weight; (2) the organic matter in sediments of the drinking water reservoir was composed of terrestrial humic-like substance component C1 (250 nm, 425 nm), tryptophan and amino acid-like substances component C2 (230 nm/280 nm, 322 nm), and traditional microbial humic-like substances component C3 (250 nm, 340 nm). Component C2 accounted for a higher percentage, and the organic matter in July showed a higher total fluorescence intensity; (3) during the aerobic denitrification process, organic matter in May displayed better characteristics as an electron donor, while organic matter in July exhibited excellent performance as an energy substance and better denitrification characteristics of the strain WGX-9; (4) the aerobic denitrification performance of the strain WGX-9 can be significantly promoted when the organic matter in sediments is a carbon source, compared with natural organic matter, algae organic matter, and actual water of the drinking water reservoir. This study clarifies the characteristics of the organic matter in sediments during the thermal stratification period of the drinking water reservoir and its effect on an aerobic denitrifier. This will provide a scientific basis for the research of nitrogen pollution control in micro-polluted water sources.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Reservoirs (water) Controlled terms:Amino acids - Biogeochemistry - Carbon - Denitrification - Fluorescence - Molecular weight distribution - Nitrogen removal - Organic compounds - Oxic sediments - Potable water - Thermal stratification - Water pollution - Water pollution control Uncontrolled terms:Aerobic denitrification - Algae organic matters - Fluorescence intensities - Fluorescent characteristic - Humic-like substances - Micro-polluted water sources - Natural organic matters - Relative molecular mass Classification code:441.2 Reservoirs - 444 Water Resources - 453 Water Pollution - 453.2 Water Pollution Control - 481.2 Geochemistry - 483 Soil Mechanics and Foundations - 741.1 Light/Optics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 931.3 Atomic and Molecular Physics Numerical data indexing:Percentage 4.46e+01%, Size 2.50e-07m, Size 3.22e-07m, Size 3.40e-07m, Size 4.25e-07m DOI:10.13227/j.hjkx.202004250 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953462 Title:Microbial Diversity Analysis of WWTPs Based on Hybrid-MBBR Process in a Low Temperature Season in the Yangtze River Delta Title of translation:长三角地区MBBR泥膜复合污水厂低温季节微生物多样性分析 Authors:Han, Wen-Jie (1); Wu, Di (1); Zhou, Jia-Zhong (1); He, Qiang (2); Kan, Yu-Jiao (3) Author affiliation:(1) Biofilm Research Institute, Qingdao SPRING Water Treatment Co., Ltd., Qingdao; 266510, China; (2) Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing; 400045, China; (3) School of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao; 266590, China Corresponding author:Wu, Di(hitwudi@126.comemailkanyujiao@163.com)Kan, Yu-Jiao(kanyujiao@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5037-5049 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The aim of this study was to characterize the changes of the microbial community in WWTPs based on hybrid-MBBR process in the Yangtze River Delta in a low temperature season, and to obtain the regularity of the microbial distribution. High-throughput sequencing of Illumina miSeq was conducted to analyze the microbial community structure of activated sludge and suspended carrier biofilm in the aerobic area of five WWTPs. The results showed that the number of microbial species in the suspended carrier biofilm was lower than that of the activated sludge in the same plant, and the species distribution was more uneven. The addition of a suspended carrier can improve the microbial diversity of the system, while the influent and operation mode have a certain selectivity to the microbial community composition of the system. The bacteria with high relative abundance in each plant primarily included Nitrospira, Mycobacterium, Defluvicoccus, Hyphomacrobium, and Macrocharacters, etc. The addition of suspended carriers significantly enhanced the enrichment of Nitrospira. The amount of nitrifying bacteria in the suspended carrier accounted for 86.12%-95.36% of that of the whole system. A certain relative abundance of denitrifying bacteria was detected in the suspended carrier in the aerobic area of each plant. Combined with the results of the measurement of water quality along the process and the lab-scale experiment, it was confirmed that significant SND occurred on the suspended carrier biofilm in the aerobic area, which enhanced the TN removal of the system.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Aerobic bacteria Controlled terms:Biofilms - Denitrification - Nitrification - Temperature - Water quality Uncontrolled terms:Denitrifying bacteria - High-throughput sequencing - Microbial communities - Microbial community composition - Microbial community structures - Microbial distribution - Nitrifying bacteria - Species distributions Classification code:445.2 Water Analysis - 461 Bioengineering and Biology - 462.5 Biomaterials (including synthetics) - 641.1 Thermodynamics - 802.2 Chemical Reactions Numerical data indexing:Percentage 8.61e+01% to 9.54e+01% DOI:10.13227/j.hjkx.202003327 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278098 Title:Accounting Methods of VOCs Emission Associated with Production Processes in a Fine Chemical Industrial Park Title of translation:精细化工园区工艺过程VOCs产生量核算方法 Authors:Ye, Han-Yun (1); Tian, Jin-Ping (1, 2); Chen, Lü-Jun (1, 2, 3) Author affiliation:(1) School of Environment, Tsinghua University, Beijing; 100084, China; (2) Center for Ecological Civilization, Tsinghua University, Beijing; 100084, China; (3) Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environment, Yangtze Delta Region Institute of Tsinghua University, Jiaxing; 314006, China Corresponding author:Tian, Jin-Ping(tianjp@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1116-1122 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Volatile organic compounds (VOCs) are one of the key atmospheric pollutants associated with great impact on air quality. Industrial sources have become the most important source of VOCs emissions in China, of which the chemical industry accounts for a large part. At present, more than half of chemical manufacturers are clustered in chemical industrial parks (CIPs), thus the control of VOCs in CIPs is crucial. This study analyzed the production processes of the fine chemical industry and the principle of VOCs production, and then proposed an accounting model of VOCs emissions associated with production processes, based on a typical fine chemical industrial park: Hangzhou Bay Shangyu Economic and Technological Development Area (HSEDA). The quantity of VOCs generation in the main production processes, such as feeding, heating, chemical reaction gas take-off, cleaning, vacuum pumping, pressure release, and evaporating, were calculated. Meanwhile, the chemical process simulation software Aspen was also employed to simulate the VOCs generation in these processes. The methods were applied to 14 representative products in HSEDA and the feature of VOCs generation in the chemical processes mentioned above, and components were revealed. The results of the two methods were compared, and the difference between the two methods was within±22% except for the pressure release process. The model and accounting methods proposed in this study will have sound applicability in accounting for VOCs emissions in fine chemical industrial parks underpinned by quantitative chemical industry production parameters.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Industrial emissions Controlled terms:Air quality - Chemical analysis - Chemical cleaning - Chemical industry - Computer software - Volatile organic compounds Uncontrolled terms:Atmospheric pollutants - Chemical industrial park - Chemical process simulation - Chemical production - Fine chemical industrial parks - Fine chemical industry - Process simulations - Technological development Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 723 Computer Software, Data Handling and Applications - 804 Chemical Products Generally - 804.1 Organic Compounds - 805 Chemical Engineering, General DOI:10.13227/j.hjkx.201909088 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278170 Title:Spatial-temporal Variation and Source Change of Heavy Metals in the Cropland Soil in the Industrial City Title of translation:工业城市农田土壤重金属时空变异及来源解析 Authors:Li, Yan-Ling (1, 2); Lu, Yi-Fu (3); Chen, Wei-Ping (1, 2); Yang, Yang (1); Cai, Bin (1) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory for Monitoring and Remediation of Heavy Metal Polluted Soils of Henan Province, Jiyuan; 459000, China Corresponding author:Yang, Yang(yyang@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1432-1439 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Environmental policy regulation affects the accumulation of heavy metals in soil. Two soil surveys were conducted in farmland in industrial cities. Classical statistical and geostatistical methods were applied to examine the content changes and spatial-temporal distribution characteristics of Cd, Pb, Cu, and Zn in soil. The pollution sources and their contribution rates were further analyzed by a principal component analysis/absolute principal component scores (PCA/APCS) model. The results indicated that the concentrations of Cd, Pb, Cu, and Zn increased during the two periods. The content of Cd and Pb in the spatial distribution decreased from northwest to southeast in both periods. The content of Cu and Zn decreased from north to south in 2011, and gradually decreased from northwest to southeast in 2017. Compared with 2011, the contribution rate of industrial activities increased by 5.58%, 10.4%, and 20.4% for Cd, Cu, and Zn, respectively, but decreased by 19.7% for Pb. The contribution rates of the other factors to Cd and Pb increased by 3.76% and 24.83%, respectively, and decreased by 9.27% and 4.31% for Cu and Zn, respectively. Relevant measures have reduced the accumulation of Pb in regional soil caused by industrial activities, but not Cd, Cu, or Zn. In addition, new Cd and Pb pollution sources need to be paid attention to.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Soils Controlled terms:Environmental protection - Environmental regulations - Heavy metals - Pollution - Soil surveys Uncontrolled terms:Environmental policy - Geostatistical method - Industrial activities - Industrial development - Principal Components - Source identification - Spatial temporals - Spatial-temporal distribution Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography Numerical data indexing:Percentage 9.27e+00%, Percentage 1.04e+01%, Percentage 1.97e+01%, Percentage 2.04e+01%, Percentage 2.48e+01%, Percentage 3.76e+00%, Percentage 4.31e+00%, Percentage 5.58e+00% DOI:10.13227/j.hjkx.201907254 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278127 Title:Impact of Parameterization on the Estimation of Ammonia Emissions: A Case Study over the Yangtze River Delta Title of translation:参数选取对畜禽养殖业大气氨排放的影响:以长三角地区为例 Authors:Zhang, Qi (1); Huang, Ling (2); Yin, Si-Jia (2); Wang, Qian (2); Li, Hong-Li (2); Wang, Yang-Jun (2); Wang, Jun (1); Chen, Yong-Hang (1); Li, Li (2) Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China Corresponding author:Li, Li(Lily@shu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1158-1166 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Atmospheric ammonia plays an important role in the formation of secondary inorganic composition of PM2.5, which has attracted a high level of attention from researchers both in China and abroad. Quantifying ammonia emissions is of great scientific significance regarding research on the formation of secondary aerosol, realizing better model performance, and control of ammonia emissions. Previous studies have shown that agricultural activities are the dominant source of atmospheric ammonia, of which livestock and poultry farming contribute the most. Existing studies on estimating ammonia emissions from livestock and poultry farming activities are mostly based on emission factors and activities. However, the choice of different emission activities could lead to large differences in estimated ammonia emissions. This study makes a variety of assumptions from the selection of activity levels (volume vs. inventory) and emission coefficients (monthly vs. annual average temperature), and establishes eight scenarios from which to calculate atmospheric ammonia emissions from livestock and poultry farming in the Yangtze River Delta region in 2017. The results show that selection of different activity levels has the greatest impact on estimated ammonia emissions; estimation based on volume is higher than that based on inventory by 27.6%-34.1%. Calculation based on a more detailed monthly average temperature is higher than using average annual temperature by 3 000 to 4 000 tons per year. In addition, the spatial and temporal distributions of the ammonia emissions are also closely related to the choice of volume vs. inventory and the choice of monthly average temperature vs. annual average temperature. When using inventory as the emission activity, Zhoushan (Zhejiang Province) has the lowest ammonia emissions, while Huainan (Anhui Province) has the highest. In contrast, when volume is used, Lishui (Zhejiang Province) has the lowest ammonia emissions and Nanjing (Jiangsu Province) has the highest. Emissions calculations based on monthly average temperature are supposed to be more representative than those based on annual average temperature, with the highest emissions from May to September and the lowest in the winter (December, January, and February).
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Atmospheric temperature Controlled terms:Agricultural robots - Agriculture - Ammonia - Rivers Uncontrolled terms:Agricultural activities - Annual temperatures - Atmospheric ammonia - Emission coefficient - Emission factors - Scenario analysis - Spatial and temporal distribution - Yangtze river delta Classification code:443.1 Atmospheric Properties - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Mass 2.72e+06kg to 3.63e+06kg, Percentage 2.76e+01% to 3.41e+01% DOI:10.13227/j.hjkx.201908131 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368720 Title:Construction and Mechanism of Methanotroph-based Ultimate Denitrification System for Tailwater of Urban Sewage Plants Title of translation:基于甲烷氧化菌的城镇污水厂尾水极限脱氮系统构建及机制 Authors:Yang, Ya-Nan (1); Li, Yan-Cheng (1, 2); Li, Jiang (1, 2); Wu, Pan (1, 2); Yang, Zhao (1); Xiang, Fu-Liang (1) Author affiliation:(1) College of Resource and Environmental Engineering, Guizhou University, Guiyang; 550025, China; (2) Field Scientific Observation and Research Station, Ministry of Education, Guiyang; 550025, China Corresponding author:Li, Yan-Cheng(ycli3@gzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1787-1793 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With great practical potential of aerobic methane coupled to denitrification (AME-D) in deep denitrification of tailwater in urban sewage plants, an AME-D extreme denitrification system with low concentration of methane, was established in an improved denitrification biofilter. The finding indicated that in an intermittent operation mode, the average concentration of total nitrogen and ammonia nitrogen in the effluent could reach 1.05 mg•L^-1 and 0.54 mg•L^-1, and the average removal rate was 94.77% and 93.30%, respectively. According to Raman spectral analysis, the crests formed by NO3^- symmetric stretching disappeared, and crests formed by the vibration and absorption, where the outer alcohol COH plane or the C-H plane was bent, were significantly enhanced, so the intermediate products produced during which methane was oxidized may be alcohols. 16S rRNA gene sequencing results showed that dominant methanotrophs included Methylocystis (0.27%), Methylosarcina (0.10%), and Methyloparacoccus (0.12%), dominant denitrifying bacteria were Pseudomonas (56.92%), Paenibacillus (3.52%), and Lysinibacillus (3.00%), and the dominant nitrifying bacteria were Nitrospira (0.1%) in this system. Thus, it could be concluded that synergism of aerobic methanotrophs, denitrifying bacteria, and nitrifying bacteria could lead to extreme denitrification.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Denitrification Controlled terms:Aerobic bacteria - Ammonia - Effluents - Methane - Nitrification - Nitrogen - Nitrogen removal - Raman spectroscopy - RNA - Sewage - Sewage pumping plants - Spectrum analysis - Vibration analysis Uncontrolled terms:16S rRNA - 16S rRNA gene sequencing - Average concentration - Denitrifying bacteria - Intermediate product - Intermittent operation - Methanotrophs - Urban sewages Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461 Bioengineering and Biology - 461.2 Biological Materials and Tissue Engineering - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.05e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 5.40e-04kg/m3 to 2.20e-02kg/m3, Percentage 1.00e-01%, Percentage 1.20e-01%, Percentage 2.70e-01%, Percentage 3.00e+00%, Percentage 3.52e+00%, Percentage 5.69e+01%, Percentage 9.33e+01%, Percentage 9.48e+01% DOI:10.13227/j.hjkx.201910095 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861824 Title:Fast Start-Up ANAMMOX Operation Strategy and Flora Characteristics of a Biofilter Title of translation:生物滤池快速启动ANAMMOX运行策略及菌群特征 Authors:Wang, Xiao-Tong (1); Yang, Hong (1); Su, Yang (1); Liu, Xu-Yan (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:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3345-3355 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To achieve the rapid start-up of anaerobic ammonia oxidation (ANAMMOX) reaction at room temperature and sludge granulation, a small amount of ANAMMOX sludge was inoculated by an upflow biological filter reactor, and ANAMMOX was started by stage variable load and shortening hydraulic residence time (HRT) operation strategy. The reaction was evaluated, and the nitrogen removal characteristics of the biofilter were evaluated. The results showed that the biofilter started the ANAMMOX reaction in a medium-temperature (25-29℃) environment for 22 days. After 97 days of culture, the total nitrogen volume removal rate (NRR) reached 5.64 kg•(m³•d)^-1, the total nitrogen (TN) removal rate was close to 80%, and the average particle size of the granular sludge was 4.5 mm. High-throughput sequencing analysis showed that the biofilter formed a layered structure of nitrifying bacteria-heterotrophic bacteria, anaerobic ammonium oxidation bacteria (AAOB), and AAOB-heterotrophic bacteria from bottom to top. The various microflora synergistically denitrified, creating a low dissolved oxygen (DO) stable environment for AAOB, and the dominant population Candidatus Kuenenia (AF375995.1) was enriched. In addition, the removal process of pollutants along the path and the characteristics of sludge along the process were analyzed, and it was verified that the sludge in the reaction zone had good ANAMMOX activity. An ANAMMOX-biofilter reactor achieves rapid start-up of the ANAMMOX reaction, sludge granulation, and efficient operation by effectively maintaining the amount of bacteria and stabilizing the reaction conditions.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Nitrogen removal Controlled terms:Ammonia - Bacteria - Biofilters - Dissolved oxygen - Granulation - Nitrification - Particle size - Particle size analysis - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Average particle size - Heterotrophic bacterias - High-throughput sequencing - Hydraulic residence time - Low dissolved oxygen - Removal characteristics - Volume removal rates Classification code:452.4 Industrial Wastes Treatment and Disposal - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Age 2.66e-01yr, Age 6.03e-02yr, Percentage 8.00e+01%, Size 4.50e-03m DOI:10.13227/j.hjkx.201912112 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658090 Title:Non-activated Peroxymonosulfate-Induced Degradation of Sulfasalazine: Kinetics and Mechanism Investigations Title of translation:非活化单过硫酸盐降解柳氮磺胺吡啶:动力学及机制 Authors:Ding, Xi (1, 2); Zhang, Xue-Wei (1); Zhou, Run-Sheng (1); Song, Zhe (1); Yan, Jia-Ying (1); Zhou, Lei (1, 2, 3); Xiu, Guang-Li (1, 2, 3) Author affiliation:(1) National Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) Shanghai Key Laboratory of Environmental Standards and Risk Management of Chemical Pollutants, 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 author:Zhou, Lei(zhoulei@ecust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2310-2319 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Sulfate-radical-based advanced oxidation technologies by activation of peroxymonosulfate (PMS) have been widely applied for decontamination of wastewater, although our knowledge on the direct oxidation of organic contaminants by PMS is still limited. In this study, the direct interaction between PMS and sulfasalazine (SSZ), a widely used antibiotic, was investigated systematically, including the reaction kinetics and transformation pathways. The results revealed that SSZ degradation obeyed a pseudo-first-order kinetic model and increasing initial PMS concentration or ionic strength could accelerate the degradation rates; alkaline conditions were beneficial to SSZ removal by PMS; and the presence of Cl^- markedly promoted SSZ decay. The degradation of SSZ by PMS was inhibited in surface water. By using liquid chromatography-mass spectrometry as well as reaction site identification, two different oxidation pathways were proposed, including hydroxylation and SO2 extrusion. The findings obtained in this study could help to evaluate the feasibility of decontamination of sulfonamide antibiotics by non-activated PMS.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Reaction kinetics Controlled terms:Antibiotics - Decontamination - Degradation - Free radical reactions - Ionic strength - Kinetics - Liquid chromatography - Mass spectrometry - Oxidation - Sulfur compounds - Surface waters Uncontrolled terms:Advanced oxidation technology - Direct interactions - Kinetics and mechanism - Liquid chromatography - mass spectrometries - Organic contaminant - Pseudo-first order kinetic model - Sulfonamide antibiotics - Transformation pathways Classification code:444.1 Surface Water - 461.6 Medicine and Pharmacology - 801 Chemistry - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 931 Classical Physics; Quantum Theory; Relativity DOI:10.13227/j.hjkx.201910140 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990477 Title:Effect of On/Off Aeration Time Ratio Under High Frequency On/Off Aeration on Performance of Nitrosated Granular Sludge Title of translation:高频曝停下停曝时间对亚硝化颗粒污泥性能的影响 Authors:Zhang, Jie (1, 2); Lao, Hui-Mei (1); Li, Dong (1); Wei, Zi-Qing (1) 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:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:360-367 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The inhibition of the on/off aeration time ratio on nitrite oxidizing bacteria (NOBs) in intermittent aeration is the key to accumulating nitrite. This study explores the stable operation of nitrosated granular sludge under the same frequency of aeration and different combinations of stop exposure time. At 25-28℃, aerobic granular sludge was inoculated into a sequencing batch reactor (SBR) (R0) and acclimatized to nitrosated granular sludge by intermittent aeration and dissolved oxygen (DO) restriction. The effects of different on/off aeration time ratios in one sub-aeration cycle (3 min:3 min; 4 min:2 min; 2 min:4 min) on the performance of nitrosated granular sludge were analyzed using three same sets of SBRs (R1, R2, and R3). Experiments showed that the nitrite accumulation rates of R1 and R2 were higher, with average nitrite accumulation rates of 89% and 95%, respectively. The nitrosation performance of R3 was poor, and the nitrite accumulation rate at the end of the operation cycle was only 57%. The results showed that when the off-aeration time was between 2 and 4 minutes, the longer the off-aeration time was, the more stable the granular sludge structure was; hence, a good nitrosation performance could be maintained. When the off aeration time was less than 2 minutes, the alternation of anaerobic and aerobic environment could not be fully realized, which resulted in the sludge tending to stay in an environment of continuous aeration. Thus, the environmental advantage of intermittent aeration was lost; the NOBs could not be inhibited, and the granular sludge was disintegrated thereby leading to the deterioration of the nitrosation performance. Additionally, the longer aeration time contributed to the development of irregularly shaped particles. The longer the off-aeration time was, the higher the PN/PS value was, which was beneficial to the enhancement of the hydrophobicity of the particle surface and the sludge settling performance.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Granular materials Controlled terms:Bacteria - Batch reactors - Deterioration - Dissolved oxygen - Nitration Uncontrolled terms:Aerobic environments - Aerobic granular sludges - High frequency HF - Intermittent aeration - Irregularly shaped particles - Nitrite accumulation - Nitrite-oxidizing bacteria - Sequencing batch reactors Classification code:802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 951 Materials Science Numerical data indexing:Percentage 5.70e+01%, Percentage 8.90e+01%, Percentage 9.50e+01%, Time 1.20e+02s, Time 1.20e+02s to 2.40e+02s, Time 2.40e+02s DOI:10.13227/j.hjkx.201907146 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070250 Title:Comparison of Floating Chamber and Diffusion Model Methods for Measuring Methane Emissions from Inland Fish-Aquaculture Ponds Title of translation:基于漂浮箱法和扩散模型法测定淡水养殖鱼塘甲烷排放通量的比较 Authors:Hu, Tao (1); Huang, Jian (1); Ding, Ying (1); Sun, Zhi-Rong (1); Xu, Meng-Fan (1); Liu, Shu-Wei (1, 2); Zou, Jian-Wen (1, 2); Wu, Shuang (1, 2) Author affiliation:(1) College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China; (2) Jiangsu Collaborative Innovation Center for Solid Organic Waste Resources Utilization, Nanjing; 210095, China Corresponding author:Wu, Shuang(wushuang@njau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:941-951 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Freshwater aquaculture ponds collectively cover a large area in southeast China. They are an important anthropogenic source of CH4 emissions, however current knowledge of CH4 emissions from aquaculture ponds is limited. During September 2017 and August 2018, two independent sampling campaigns of CH4 flux measurements over annual cycles were carried out in a fish-aquaculture pond in southeast China using a floating chamber and diffusion model methods for comparison. The purpose of this study is to investigate the variation of CH4 fluxes obtained from the fish-aquaculture pond, analyze the emission mechanisms, and amplify the CH4 emissions inventory. The diffusion model method can further quantify the contribution of diffusion transmission to CH4emissions. The seasonal variations of CH4 fluxes measured by the two methods were similar, with higher CH4 fluxes appearing in summer and fall and lower CH4 fluxes appearing in spring and winter. CH4 fluxes measured by the floating chamber method and diffusion model method ranged from 0.14-3.13 mg•(m²•h)^-1and 0.04-1.41 mg•(m²•h)^-1, respectively, and the respective average values were (0.86±0.30) mg•(m²•h)^-1and (0.45±0.08) mg•(m²•h)^-1. The CH4 fluxes were positively related to water temperature, dissolved organic carbon (DOC) and chemical oxygen demand (COD), but negatively related to the water dissolved oxygen (DO) concentration in the fish-aquaculture pond. CH4 fluxes calculated by diffusion model methods were 45% lower than those determined by the floating chamber methods over annual cycles. The result suggested that the floating chamber method is more suitable than the diffusion model method for measurements of CH4 fluxes in freshwater aquaculture ecosystems.
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Diffusion Controlled terms:Aquaculture - Chemical oxygen demand - Dissolved oxygen - Fish - Lakes - Methane - Organic carbon - Particulate emissions - Water Uncontrolled terms:Anthropogenic sources - Aquaculture ponds - Diffusion model - Diffusion transmission - Dissolved organic carbon - Dissolved oxygen concentrations - Emissions inventory - Floating chamber Classification code:451.1 Air Pollution Sources - 804.1 Organic Compounds - 821.3 Agricultural Methods Numerical data indexing:Percentage 4.50e+01% DOI:10.13227/j.hjkx.201905092 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070851 Title:Spatial Distribution Characteristics and Pollution Assessment of Heavy Metals on Farmland of Geochemical Anomaly Area in Southwest Guangxi Title of translation:桂西南地球化学异常区农田重金属空间分布特征及污染评价 Authors:Wang, Fo-Peng (1); Xiao, Nai-Chuan (1); Zhou, Lang (1); Pang, Rui (1); Song, Bo (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Key Laboratory of Theory and Technology of Environmental Pollution Control in Guangxi, Guilin; 541004, China Corresponding author:Song, Bo(songbo@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:876-885 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand spatial distribution characteristics and pollution status of Cd, Cu, Ni, Pb, and Zn in soils within geochemical anomaly areas in southwestern Guangxi, 256 natural and farmland soils were collected, and heavy metal contents in soils were analyzed. The results show the following: ① The background values of Cd, Cu, Ni, Pb, and Zn in natural soils were 0.890, 32.58, 51.50, 55.57, and 168.1 mg•kg^-1, respectively. The pH value of farmland soil (n=193) ranged from 4. 8 to 7. 9. The geometric mean values of Cd, Cu, Ni, Pb, and Zn were 0.637, 30.76, 27.04, 39.59, and 123.9 mg•kg^-1, respectively. ② Kriging interpolation results showed that the spatial distribution characteristics of Cd, Ni, Pb, and Zn in farmland soils were similar, and high-content areas were mainly concentrated in Chongzuo-Longzhou area. The highest content of Cu was found in Tianlin County, Lingyun County, Baise City, and Tianyang County. ③ Taking the "Standard for Risk Control of Soil Pollution in Agricultural Land of Soil Environmental Quality" (GB 15618-2018) and soil baseline values as evaluation criteria, the above-standard rates of Cd, Cu, Ni, Pb, and Zn in farmland were 57.5%, 6.2%, 0.5%, 3.6%, 10.9%, and 4.1%, 14.0%, 0.5%, 2.1%, and 2.1%, respectively. The comprehensive pollution index shows that Tiandeng County, Longan County, Daxin County, Longzhou County, and Chongzuo City have severe combined pollution characteristics. The most important reason behind the high background value (particularly the Cd element) in the geochemical anomaly area of southwestern Guangxi is that the topography of the study area is complex, and the types of heavy metal deposits are numerous, which means that the parent material (rock) itself has a high content of heavy metals, which is weathered into soil. This soil inherits heavy metals from the parent material (rock).
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Soil surveys Controlled terms:Agricultural robots - Farms - Geochemistry - Heavy metals - Interpolation - Quality control - Soil pollution - Soil pollution control - Soils - Spatial distribution - Topography - Zinc Uncontrolled terms:Farmland - Geochemical anomaly - Guangxi - Pollution assessment - Spatial characteristics Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 546.3 Zinc and Alloys - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.3 Quality Assurance and Control - 921 Mathematics - 921.6 Numerical Methods - 951 Materials Science Numerical data indexing:Percentage 1.09e+01%, Percentage 1.40e+01%, Percentage 2.10e+00%, Percentage 3.60e+00%, Percentage 4.10e+00%, Percentage 5.00e-01%, Percentage 5.75e+01%, Percentage 6.20e+00% DOI:10.13227/j.hjkx.201906218 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008941 Title:Effect on Ammonia Inhibition Mitigation in the Anaerobic Digestion Process with Zero-Valent Iron Title of translation:零价铁对厌氧消化过程中氨氮抑制解除的影响 Authors:Liu, Ji-Bao (1); Niu, Yu-Tong (1); Yu, Da-Wei (1); Tan, Ying-Feng (2); Zuo, Zhuang (2); Wei, Yuan-Song (1) Author affiliation:(1) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) Beijing Drainage Croup Co., Ltd., Beijing; 100192, China Corresponding author:Wei, Yuan-Song(yswei@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3731-3739 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ammonia inhibition is an important factor impacting methane production efficiency during the anaerobic digestion of high-solid organic wastes. This study investigated the effect of micro-sized zero-valent iron (m-ZVI) on the anaerobic digestion of excess sewage sludge and thermal hydrolyzed sludge using batch mode experiments. The effect of m-ZVI on ammonia inhibition mitigation was also studied. Results showed that the kinetic characteristics of the methane production rate, lag phase, and methane production potential of the anaerobic digestion of excess sludge and thermal hydrolyzed sludge were not impacted by the addition of m-ZVI at a dosage of 4 g•L^-1 and 10 g•L^-1. However, during the inhibited anaerobic digestion process with a high ammonia concentration, the addition of 4 g•L^-1 and 10 g•L^-1 of m-ZVI was able to shorten the lag phase from 18.61 d (the control) to 17.22 d and 16.18 d, respectively. Moreover, the maximum methane production rate (based on the VS) increased from 6.34 mL•(d•g)^-1(the control) to 7.84 mL•(d•g)^-1 (4 g•L^-1 m-ZVI) and 7.39 mL•(d•g)^-1 (10 g•L^-1 m-ZVI). The pH buffer system was not influenced by the chemical reaction of m-ZVI in the anaerobic digestion, although the relative abundance of the dominant methanogenic archaea (Methanosarcina) improved greatly from 30.71% (the control) to 53.50% (4 g•L^-1 m-ZVI) and 60.30% (10 g•L^-1 m-ZVI) at 27 d. This study proved that m-ZVI was incapable of improving the methane production potential of sewage sludge, while the mitigation of ammonia inhibition during anaerobic digestion was enhanced by the stimulating effect on methanogenic archaea.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Anaerobic digestion Controlled terms:Ammonia - Hydrolysis - Iron - Methane - Microorganisms - pH effects - Sewage sludge - Sludge digestion Uncontrolled terms:Ammonia concentrations - Ammonia inhibition - Anaerobic digestion process - Kinetic characteristics - Methane production - Methanogenic archaea - Relative abundance - Stimulating effects Classification code:452.2 Sewage Treatment - 461.9 Biology - 545.1 Iron - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 1.00e+01kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e+00kg/m3 to 2.20e-02kg/m3, Percentage 3.07e+01% DOI:10.13227/j.hjkx.201912270 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104881 Title:Adaptability of Completely Autotrophic Nitrogen Removal over Granular Sludge to Low-Strength at Low Temperature Title of translation:低温下全自养脱氮颗粒污泥适应低基质效能 Authors:Liu, Yu-Xin (1); Wang, Jian-Fang (1, 2, 3); Qian, Fei-Yue (1, 3, 4); Chen, Qian-Miao (2); Qiao, Wei (2); Shen, Cong (2) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) College of Tianping, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (4) Jiangsu High Education Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China Corresponding author:Wang, Jian-Fang(wjf302@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4161-4168 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A single-stage PN-ANAMMOX (PN/A) granular sludge cultured at room temperature was used to investigate the completely autotrophic nitrogen removal efficiency and microbial community structure of low-strength wastewater based on the completely autotrophic nitrogen removal over nitrite in granular sludge at a low temperature. The results showed that at the low temperature (15±1)℃, the ammonia nitrogen load was maintained at 1.29 kg•(m³•d)^-1, and the ammonia nitrogen concentration in the injection was gradually reduced from 70 mg•L^-1 to 40 mg•L^-1. DO/TAN was controlled at 0.22-0.25. The total nitrogen removal rate was maintained at (85±4)%, and the average TN concentration in the effluent was 8.9 mg•L^-1. There was no significant proliferation of nitrite-oxidizing bacteria (NOB) during the operation period, and the Nitrospira abundance was less than 1%. Elutriation of the floc sludge and the control of low DO/TAN values can be used as effective control strategies to inhibit NOB proliferation. Through completely autotrophic nitrogen removal over nitrite in granular sludge operated under low-temperature and low-substrate conditions, the particle size became smaller, and the color changed from brown red to brown yellow. The total amount of PS decreased slightly, and the ratio of PN/PS stabilized at 2.5-3.0. Planctomycetes and Proteobacteria dominated the community, and Candidatus_Kuenenia and Candidatus_Brocadia were two AMX bacteria in the sludge.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Nitrogen removal Controlled terms:Ammonia - Bacteria - Effluents - Granular materials - Particle size - Temperature - Wastewater treatment Uncontrolled terms:Ammonia nitrogen - Autotrophic nitrogen removal - Control strategies - Low strength wastewater - Microbial community structures - Nitrite-oxidizing bacteria - Substrate conditions - Total nitrogen removal Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 641.1 Thermodynamics - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Mass_Density 7.00e-02kg/m3 to 4.00e-02kg/m3, Mass_Density 8.90e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+00% DOI:10.13227/j.hjkx.202003036 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256392 Title:Kinetics and Mechanism of Sucralose Degradation in Water Using UV-activated Persulfate Process Title of translation:紫外活化过硫酸盐降解水中三氯蔗糖动力学和机制 Authors:Yu, Yun (1); Lu, Jin-Xin (1); Lü, Zhen (2); Peng, Ming-Guo (1); Xu, Bin-Kun (1); Du, Er-Deng (1); Zheng, Lu (1) Author affiliation:(1) School of Environmental & Safety Engineering, Changzhou University, Changzhou; 213164, China; (2) Office of Drainage Management, Changzhou; 213016, China Corresponding author:Peng, Ming-Guo(pmg@cczu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4626-4635 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The degradation of emerging pollutant artificial sweetener sucralose (SUC) using UV/persulfate (UV/PS). The effects of several process parameters, including UV light intensity, PS dosage, pH, and anion concentration, were also investigated. The degradation products and their toxicity during the UV/PS process were further analyzed and evaluated. It is reported that, compared with single UV or PS, the degradation of SUC by UV/PS was more obvious. The degradation rate constants increased with an increase in the light intensity and PS dosage. The SUC degradation could be improved under neutral conditions. The background ions NO3^- and HCO3^- could inhibit the degradation process, while Cl^- and SO4^2- ions could accelerate the process. Sixteen intermediate products were identified using high-resolution mass spectrometry (HRMS) and GC-MS. Hydroxylation, oxidation, ether cracking, and other reactions were involved. A degradation path was further proposed. Moreover, luminescent bacteria toxicity test and ECOSAR prediction showed that the intermediates with higher toxicity could be produced during UV/PS, which could pose a potential threat to the ecological environment.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Water treatment Controlled terms:Degradation - Ions - Mass spectrometry - Rate constants - Sugar substitutes - Toxicity Uncontrolled terms:Anion concentrations - Artificial sweeteners - Degradation rate constants - Ecological environments - High resolution mass spectrometry - Intermediate product - Kinetics and mechanism - Luminescent bacteria Classification code:445.1 Water Treatment Techniques - 461.7 Health Care - 801 Chemistry - 802.2 Chemical Reactions - 822.3 Food Products DOI:10.13227/j.hjkx.202001046 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256320 Title:Synergistic Reaction Mechanism of Cu⁰@Fe3O4 Activated PMS for Degradation of p-nitrophenol Title of translation:纳米Cu⁰@Fe3O4活化PMS降解对-硝基苯酚的协同反应机制 Authors:Shi, Qing-Qing (1, 2); Pu, Sheng-Yan (1, 2, 3); Yang, Xi (1, 2) Author affiliation:(1) College of Ecology and Environment, Chengdu University of Technology, Chengdu; 610059, China; (2) State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu; 610059, China; (3) State Key Laboratory of Environmental Criteria and Risk Assessment, China Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Pu, Sheng-Yan(pushengyan@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4615-4625 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A Cu⁰/PMS system mainly relies on the leaching of copper ions to degrade the pollutants and adapt to the narrow pH range (<7). To solve this defect, we studied the properties and reaction mechanism of Cu⁰@Fe3O4 magnetic core-shell material, which was successfully prepared using co-precipitation method, taking PNP as the target pollutant. The results showed that: ① a degradation rate of 96% can be achieved within 60 min for 5 mg•L^-1 PNP, 200 mg•L^-1 Cu⁰@Fe3O4, and 0.5 mmol•L^-1 PMS at a natural pH value (5.65); ② the Cu⁰@Fe3O4/PMS system can be regarded as a heterogeneous reaction system because TCu, TCu⁺, and iron leaching were almost negligible; ③ on comparing the performance of the Cu⁰@Fe3O4/PMS system and Cu⁰/PMS system in the pH range of 3 to 11, it was discovered that the method by which Cu⁰ activates the PMS to degrade the PNP was successfully changed by coating a layer of Fe3O4. The Cu⁰@Fe3O4/PMS system has a good degradation performance towards PNP in the pH range of 5-9; ④ SO4^-• and HO• existed in the reaction system, and their contribution rates to the reaction system were 34% and 60%; HO• was the dominant free radical; ⑤ A bimetallic synergy exists between Fe and Cu. The presence of Cu(Ⅰ) can promote the reduction of Fe(Ⅲ) to Fe(Ⅱ), thereby forming a good redox cycle and improving the durability of the reaction system.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Copper compounds Controlled terms:Degradation - Free radicals - Iron oxides - Leaching - Magnetite - Metal ions - pH - Pollution - Precipitation (chemical) - Reaction rates - Redox reactions Uncontrolled terms:Contribution rate - Coprecipitation method - Core-shell materials - Degradation rate - Heterogeneous reaction systems - Reaction mechanism - Synergistic reactions - Target pollutants Classification code:531.1 Metallurgy - 801.1 Chemistry, General - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Molar_Concentration 5.00e-01mol/m3 to 2.20e-02mol/m3, Percentage 3.40e+01%, Percentage 9.60e+01%, Time 3.60e+03s DOI:10.13227/j.hjkx.202003185 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008912 Title:Nitrogen and Phosphorus Removal from Domestic Sewage Aerobic Granular Sludge Under Intermittent Gradient Aeration Title of translation:间歇梯度曝气的生活污水好氧颗粒污泥脱氮除磷 Authors:Zhang, Yu-Jun (1); Li, Dong (1); Li, Shuai (1, 2); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil 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:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3707-3714 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, three SBR reactors R1, R2, and R3 were set up and operated using (A/O)3-SBR gradient aeration, (A/O)3-SBR constant aeration, and the conventional (A/O)-SBR mode, respectively. The nutrient removal performance and aerobic granular sludge characteristics under these aeration modes were explored using real municipal wastewater as the influent matrix. The experimental results revealed that for the R1, R2, and R3 particles during the stable period, the average removal rate of COD was 88.68%, 89.05%, and 88.96%, respectively, the average removal rate of TN was 76.97%, 71.99%, and 64.92%, respectively, the average removal rate of TP was 96.28%, 85.05%, and 78.97%, respectively, and the proportion of denitrifying phosphorus accumulating bacteria to phosphorus accumulating bacteria was 25.52%, 19.60%, and 12.77%, respectively. The results showed that the operation mode of anaerobic, aerobic, and anoxic was more conducive to the enrichment of denitrifying phosphorus accumulating bacteria (DPAOs), and that the gradient aeration was more enriched than the constant aeration mode, which is of great significance to low-intensity municipal domestic sewage treatment with an insufficient carbon source. At the same time, the dissolved oxygen in the aeration section of R1 was reduced step-by-step, which improved the simultaneous nitrification and denitrification rates of particles and the utilization rate of the internal carbon source, which was beneficial for the efficient removal of TN. The particle size of the three groups of reactors was 727.368, 815. 072, and 895. 041 μm respectively. As the transfer rate of the matrix decreased with particle size, the microorganisms in R2 and R3 may have caused anaerobic respiration to release harmful gas, thus damaging the particle structure, such that the particles in R2 and R3 were less dense than those in R1. In addition, the PN/PS values of R1, R2, and R3 were 6.31, 5.63, and 4.83, respectively, and the EPS content (in terms of VSS) was 103.97, 92.22, and 76.98 mg•g^-1, respectively, at the time of particle stabilization, which revealed that the mode of intermittent gradient aeration was beneficial to stimulate the secretion of EPS. This was especially the case for the secretion of PN, which increased the PN/PS value, enhanced the cell hydrophobicity, and made the particles dense and stable.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Sewage aeration Controlled terms:Aerobic bacteria - Anoxic water - Carbon - Denitrification - Dissolved oxygen - Granular materials - Nitrification - Nitrogen - Nitrogen removal - Particle size - Phosphorus - Sewage Uncontrolled terms:Aerobic granular sludges - Anaerobic respiration - Domestic sewage treatment - Municipal wastewaters - Nitrogen and phosphorus removal - Particle stabilization - Phosphorus accumulating - Simultaneous nitrification and denitrification Classification code:452.1 Sewage - 452.2 Sewage Treatment - 461 Bioengineering and Biology - 802.2 Chemical Reactions - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Percentage 1.28e+01%, Percentage 1.96e+01%, Percentage 2.55e+01%, Percentage 6.49e+01%, Percentage 7.20e+01%, Percentage 7.70e+01%, Percentage 7.90e+01%, Percentage 8.50e+01%, Percentage 8.87e+01%, Percentage 8.90e+01%, Percentage 9.63e+01%, Size 4.10e-05m DOI:10.13227/j.hjkx.202001032 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861903 Title:Analysis of Transport Pathways and Potential Sources of Atmospheric Particulate Matter in Zigong, in South of Sichuan Province Title of translation:川南自贡市大气颗粒物污染特征及传输路径与潜在源分析 Authors:Lei, Yu (1); Zhang, Xiao-Ling (1); Kang, Ping (1); Wang, Hao-Lin (2); Qing, Quan (3); Ou, Yi-Han (1); Lu, Ning-Sheng (1); Deng, Zhong-Ci (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) School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou; 510275, China; (3) Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Sichuan Provincial Meteorological Observatory, Chengdu; 610072, China Corresponding author:Zhang, Xiao-Ling(xlzhang@ium.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3021-3030 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Atmospheric particulate matter pollution in Zigong City in southern Sichuan is quite severe. The average concentrations of PM10 and PM2.5 from 2015 to 2018 were (95.42±9.53) μg•m^-3 and (65.95±6.98) μg•m^-3, with an obvious trend of decline. The concentrations of PM10 and PM2.5 in winter were much higher than in other seasons, with the highest average concentrations being(138.08±52.29) μg•m^-3 and (108.50±18.05) μg•m^-3 in January, respectively, whereas in summer, the average concentrations were lowest. The average ratio of PM2.5 to PM10 is 69.12%, and the ratio in winter is about 1.17 times that in summer; thus, PM2.5 is mainly responsible for the air pollution. To explore the potential sources of fine particulate matter (PM2.5) in Zigong City and the pollution contributions of different sources in different seasons, the concentration of PM2.5 in Zigong and the daily trajectory after 72 h were calculated and clustered by the combined use of a variety of potential source analysis methods and data. These methods and data included the hybrid single particle lagrangian integrated trajectory (HYSPLIT) model, global data assimilation system (GDAS) meteorological data, potential source contribution analysis (PSCF), and concentration of weight trajectory analysis (CWT). The results showed that the area near Zigong is mostly controlled by southeasterly, westerly, and northwesterly winds in all seasons, and the high PM2.5 concentration is mostly located in the low-wind-speed zone of 0-2 m•s^-1. The influence of different seasons and transport routes on PM2.5 pollution in Zigong is significant. In spring, it is mainly affected by short-distance air flow from the west and north; in summer, the pollution mainly comes from the southeast air flow of short-distance transportation; in autumn, it is mainly affected by short-distance transportation air flow from Ziyang, Suining, Chongqing, and Neijiang; and in winter, it is not only affected by the surrounding cities such as Ziyang, Suining, and Neijiang but also by the long-distance transportation air flow from central Tibet. In general, the potential source area of particulate matter in Zigong City is mainly located in the border area between the west of Chongqing and the south of Sichuan. In winter, the main contribution area is at its widest, while in summer, the potential source area is smallest.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Particles (particulate matter) Controlled terms:Air - Meteorology - Pollution - Trajectories - Transportation routes - Wind Uncontrolled terms:Atmospheric particulate matter - Average concentration - Fine particulate matter (PM2.5) - Global data assimilation system - Meteorological data - PM2.5 concentration - Trajectory analysis - Transport pathways Classification code:443.1 Atmospheric Properties - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Percentage 6.91e+01%, Time 2.59e+05s, Velocity 0.00e+00m/s to 2.00e+00m/s DOI:10.13227/j.hjkx.201911096 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106207 Title:Characterization and Size Distribution of Carbonaceous Aerosols at Mountain Dinghu Title of translation:鼎湖山大气颗粒物中OC与EC的浓度特征及粒径分布 Authors:Li, An-Na (1, 2); Wen, Tian-Xue (2); Hua, Wei (1); Yang, Yuan (2); Meng, Ze (3); Hu, Bo (2); Xin, Jin-Yuan (1, 2) Author affiliation:(1) School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu; 610225, China; (2) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry(LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (3) South China Botanical Garden, Chinese Academy of Sciences, Guangzhou; 510650, China Corresponding author:Wen, Tian-Xue(wtx@dq.cern.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3908-3917 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the characterization and sources of carbonaceous aerosols at Mountain Dinghu, organic carbon (OC) and elemental carbon (EC) in size-resolved aerosol samples were measured at a regional background site in South China using a DRI Model 2001A analyzer. The average mass concentrations of organic carbon (OC) are (5.6±2.0) μg•m^-3 in PM1.1, (7.3±2.4) μg•m^-3 in PM2.1, and (12.8±4.0) μg•m^-3 in PM9.0; the average mass concentrations of elemental carbon (EC) are (2.3±1.4) μg•m^-3in PM1.1, (2.7±1.6) μg•m^-3 in PM2.1, and (3.4±1.7) μg•m^-3 in PM9.0. OC concentrations in PM1.1 and PM2.1 account for 43.8% and 57.0% of OC in PM9.0, and EC concentrations in PM1.1 and PM2.1 account for 67.6% and 79.4%, respectively. OC and EC are enriched with fine particles. In PM1.1 and PM2.1, the highest concentrations of OC and EC are measured in autumn, and the lowest concentration of OC is measured in winter and EC in summer. In PM9.0, the highest OC concentration is measured in summer. Carbonaceous aerosols are mainly composed of OC2, EC1, OC3, and OC4. In summer, the concentration of OC3 is higher than that of EC1, suggesting that biogenic sources are dominant during summer. The concentration of EC1 in winter is the highest, indicating that the impacts of motor vehicle emissions are prominent in the local area during winter. OC and EC both show bimodal distributions in four seasons, with peaks in the size ranges of 0.43-0.65 μm for fine particles and 3.3-5.8 μm for coarse particles. In PM1.1 and PM2.1, the sources of OC are mainly primary emissions. In PM2.1, the highest concentration of SOC is measured in spring at (3.0±1.4) μg•m^-3 and the lowest in winter at (1.3±1.4) μg•m^-3, indicating that the secondary aerosol formation is significant in spring. At the Mountain Dinghu background site, OC is mainly from coal combustion and motor vehicle emissions for fine particles and from biogenic sources for coarse particles. EC is mainly from coal combustion, motor vehicle emissions, and dust.
© 2020, Science Press. All right reserved. Number of references:56 Main heading:Coal combustion Controlled terms:Aerosols - Coal dust - Landforms - Organic carbon - Springs (components) - Vehicles Uncontrolled terms:Bimodal distribution - Carbonaceous aerosol - Coarse particles - Elemental carbon - Mass concentration - Motor vehicle emissions - Primary emissions - Secondary aerosols Classification code:481.1 Geology - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 601.2 Machine Components - 804.1 Organic Compounds Numerical data indexing:Electric_Current 2.00e+03A, Percentage 4.38e+01%, Percentage 5.70e+01%, Percentage 6.76e+01%, Percentage 7.94e+01%, Size 3.30e-06m to 5.80e-06m, Size 4.30e-07m to 6.50e-07m DOI:10.13227/j.hjkx.201911237 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256521 Title:Characteristics of Carbonaceous Species in PM2.5 in Southern Beijing Title of translation:北京南部城区PM2.5中碳质组分特征 Authors:Dong, Gui-Ming (1); Tang, Gui-Qian (2); Zhang, Jun-Ke (1); Liu, Qin (1); Yan, Guang-Xuan (3); Cheng, Meng-Tian (2); Gao, Wen-Kang (2); Wang, Ying-Hong (2); Wang, Yue-Si (2) Author affiliation:(1) Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu; 611756, China; (2) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (3) Henan Key Laboratory of Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China Corresponding author:Zhang, Jun-Ke(zhangjunke@home.swjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4374-4381 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the characteristics of carbonaceous species in PM2.5 in Beijing after the implementation of the Action Plan for the Prevention and Control of Air Pollution, PM2.5 was continuously sampled in the heavily polluted southern urban area of Beijing from December 2017 to December 2018. The characteristics of organic carbon (OC) and element carbon (EC) were then determined. The results showed that the annual concentrations of PM2.5, OC, and EC in Beijing varied in wide ranges of 4.2-366.3, 0.9-74.5, and 0.0-5.5 μg•m^-3, respectively, and the average mass concentration were (77.1±52.1), (11.2±7.8), and (1.2±0.8) μg•m^-3. Overall, the carbonaceous species (OC and EC) accounted for 16.1% of the PM2.5 mass. The seasonal characteristics of the OC mass concentrations were: winter [(13.8±8.7) μg•m^-3]>spring [(12.7±9.6) μg•m^-3]>autumn [(11.8±6.2) μg•m^-3]>summer [(6.5±2.1) μg•m^-3]. The concentration of the EC during the four seasons was low, ranging from 0.8 to 1.5 μg•m^-3. The annual average mass concentration and contribution of secondary organic carbon (SOC) were (5.4±5.8) μg•m^-3 and 48.2%, respectively, highlighting the significant contribution of the secondary process. With the aggravation of pollution, although the contribution proportion of OC and EC decreased, their mass concentrations during "heavily polluted" days were 6.3 and 3.2 times that of "excellent" days, respectively. Compare to non-heating period, the mass concentrations of PM2.5, OC, and SOC increased by 14.4%, 47.9%, and 72.1% in heating period, respectively, which emphasized the importance of carbonaceous species during heating periods. Potential source contribution function (PSCF) analysis showed that the southwest areas of Beijing (such as Shanxi and Henan province) were the main potential source areas of PM2.5 and OC. The high value area of the PSCF of EC was less and the main potential source area was in the south of Beijing (such as Shandong and Henan province).
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Air pollution control Controlled terms:Organic carbon Uncontrolled terms:Carbonaceous species - Mass concentration - Potential source contribution function - Potential sources - Prevention and controls - Seasonal characteristics - Secondary organic carbons (SOC) - Secondary process Classification code:451.2 Air Pollution Control - 804.1 Organic Compounds Numerical data indexing:Percentage 1.44e+01%, Percentage 1.61e+01%, Percentage 4.79e+01%, Percentage 4.82e+01%, Percentage 7.21e+01% DOI:10.13227/j.hjkx.202003031 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517460 Title:Analysis of Multi-scale Spatio-temporal Differentiation Characteristics of PM2.5 in China from 2011 to 2017 Title of translation:2011~2017年中国PM2.5多尺度时空分异特征分析 Authors:Yang, Wen-Tao (1, 2); Qiao, Peng (2); Liu, Xian-Zhao (2); Lei, Yu-Liang (3) Author affiliation:(1) National-Local Joint Engineering Laboratory of Geo-Spatial Information Technology, Hunan University of Science and Technology, Xiangtan; 411201, China; (2) School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan; 411201, China; (3) Economic College, Hunan Agricultural University, Changsha; 410082, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5236-5244 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:It is of great significance for joint prevention and control of air pollution to understand the spatial and temporal differentiation characteristics and regional driving factors of PM2.5 in China. In this study, from a multi-scale perspective, the spatial pattern analysis and geographical detectors are used to explore the spatial and temporal distribution pattern and causes of PM2.5 pollution in China mainland from 2011 to 2017. The results show that: ① the annual average PM2.5 concentration is relatively stable from 2011 to 2017, and there is no obvious trend. The change characteristics of regional PM2.5 are similar to those of national PM2.5, showing a "W" shaped fluctuation. Overall, the order of pollution degree from high to low is: central, eastern, western, and northeastern. ② From the spatial pattern analysis results, we can see that the high-value cluster mainly appears in east China, middle China, and southwest of Xinjiang, while the low-value cluster appears in Qinghai-Tibet, Yunnan, Guizhou, Plateau, and Daxinganling regions. ③ The results of geographic detector analysis show that the population factor is the leading factor nationally; meanwhile, the industrial, energy consumption, and traffic factors all contribute to the distribution pattern of PM2.5 in varying degrees. Regionally, besides the population factor, the proportion of secondary production and urban green space rate have the greatest impact on the northeast, the industrial smoke and dust and road area in the east, and the total industrial electricity and buses in the central area. The impact of social and economic factors does not significantly affect the PM2.5 in the western region.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Spatial variables measurement Controlled terms:Air pollution - Air pollution control - Energy utilization - Geographical distribution - Green manufacturing - Smoke Uncontrolled terms:Distribution patterns - PM2.5 concentration - Prevention and controls - Secondary production - Spatial and temporal distribution - Spatial pattern analysis - Spatio-temporal differentiations - Urban green spaces Classification code:405.3 Surveying - 451 Air Pollution - 451.2 Air Pollution Control - 525.3 Energy Utilization - 943.2 Mechanical Variables Measurements DOI:10.13227/j.hjkx.202005110 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517617 Title:Temporal and Spatial Characteristics of Total Phosphorus in the Middle and Lower Yangtze River Mainstem Under New Water and Sediment Conditions Title of translation:新水沙条件下长江中下游干流水体总磷时空变化分析 Authors:Zhuo, Hai-Hua (1); Lou, Bao-Feng (1); Wu, Yun-Li (1); Wang, Rui-Lin (1); Chen, Jie (1); Lan, Jing (1) Author affiliation:(1) Yangtze River Basin Ecological Environment Monitoring and Scientific Research Center, Yangtze River Basin Ecological Environment Supervision and Administration Bureau, Ministry of Ecological Environment, Wuhan; 430010, China Corresponding author:Lan, Jing(lanjing@cjjg.mee.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5371-5380 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:After the completion of the Three Gorges Reservoir and the upstream reservoir group of the Yangtze River, new water and sediment conditions appeared in the middle and lower reaches of the Yangtze River, and its influence on the phosphorus concentrations in water has attracted much attention. Therefore, the spatial and temporal distributions of total phosphorus (TP) concentrations in the middle and lower reaches of the mainstem under the new water and sediment conditions were studied. The results show that: ① after the construction of the Three Gorges Reservoir, the concentrations of TCP (samples were allowed to settle for 30 min) in the middle and lower reaches of the Yangtze River fluctuates between 0.10 and 0.15 mg•L^-1, and generally increased during 2004-2010 and then decreased during 2014-2019, and increases along the flow direction. The concentrations of dissolved total phosphorus (TDP) have slowly increased with time. ② The settleable solids influence the phosphorus content to varying degrees. The median values of TCP/TP ratio in Nanjinguan, Hankou, and 23 km below Wusongkou, are 0.900, 0.720, and 0.609, respectively, which decreases successively from upstream to downstream. The proportion of TPP (total particulate phosphorus)/TP shows an increasing trend along the flow direction. The median values of TPP/TP ratios in Nanjinguan, Hankou, and 23 km below Wusongkou were 0.439, 0.567, and 0.738, respectively. ③ According to the "Environmental quality standard for surface water GB 3838-2002", the water quality was assessed using TCP concentrations, and the assessment results showed that the water quality of the middle and lower reaches of the Yangtze River was generally good. However, considering the influence of settleable solids, the water quality categories assessed based on TP concentrations would be worse, especially near estuaries. ④ In the middle and lower reaches of Yangtze River, there is little difference in the phosphorus concentration of different monitoring sites in the upper section of main stream; however, the difference is obvious near the estuary. ⑤ The concentration of TCP in the coastal waters of the urban river section of the middle and lower reaches of the Yangtze River is significantly higher than that of the main channel, and there are obvious coastal pollution zones in the coastal waters of the urban river section.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:River pollution Controlled terms:Coastal zones - Marine pollution - Phosphorus - Reservoirs (water) - Rivers - Sediments - Transmission control protocol - Water quality Uncontrolled terms:Environmental quality standards - Middle and lower reaches of the yangtze rivers - Middle and lower reaches of yangtze rivers - Middle and lower yangtze rivers - Particulate phosphorus - Phosphorus concentration - Spatial and temporal distribution - Three gorges reservoir Classification code:441.2 Reservoirs - 445.2 Water Analysis - 453 Water Pollution - 471 Marine Science and Oceanography - 483 Soil Mechanics and Foundations - 723 Computer Software, Data Handling and Applications - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.00e-04kg/m3 to 1.50e-04kg/m3, Size 2.30e+04m, Time 1.80e+03s DOI:10.13227/j.hjkx.202005108 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106322 Title:Mechanism of Inorganic Nitrogen Transformation and Identification of Nitrogen Sources in Water and Soil Title of translation:无机态氮素转化机制及水土体氮源识别方法 Authors:Liang, Xing (1); Sun, Li-Qun (1); Zhang, Xin (1); Zhang, Jie (1); Fu, Peng-Yu (1) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4333-4344 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Nitrogen plays a vital role in biological activities as the basic element of organic molecules and the main nutrient of soil. In the study of nitrogen pollution, the first step is to understand the transformation mechanism of various nitrogen forms. Based on the transformation process and the mechanism of nitrogen in the ecosystem, this review summarizes the research methods of nitrogen source analysis and nitrogen isotope fractionation in soil and water, and categorically reviews the applications of nitrogen source identification in surface water and groundwater. We showed that it is more effective to identify the sources of soil and water nitrogen pollution by combining hydrochemical methods with the multi-isotope approach. The importance of primary nitrogen sources should also be quantified to study groundwater pollution. A new approach to determine the source of oxygen atoms during nitrosation was also presented, and the enrichment principle of δ¹⁸O-NO3^- during secondary oxidation was explained. Finally, the contribution of primary ammonium nitrogen to groundwater pollution was discussed, and innovative research ideas were provided.
© 2020, Science Press. All right reserved. Number of references:129 Main heading:Nitrogen Controlled terms:Groundwater - Groundwater pollution - Isotopes - River pollution - Soils - Surface waters Uncontrolled terms:Hydrochemical methods - Innovative research - Inorganic nitrogen - Nitrogen pollution - Secondary oxidation - Surface water and groundwaters - Transformation mechanisms - Transformation process Classification code:444.1 Surface Water - 444.2 Groundwater - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202001047 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517568 Title:Microbial Community Structure and Diversity During the Enrichment of Anaerobic Ammonium Oxidation Bacteria Title of translation:厌氧氨氧化菌富集培养过程微生物群落结构及多样性 Authors:Yan, Bing (1, 2); Xia, Song (1); Gui, Shuang-Lin (1); Fu, Jia-Qi (1); Wu, Jiu-Jiu (1); Xiong, Ji-Hai (1); Wei, Yuan-Song (1, 2) Author affiliation:(1) Institute of Energy, Jiangxi Academy of Sciences, Nanchang; 330096, China; (2) Laboratory of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Wei, Yuan-Song(yswei@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5535-5543 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the changes in microbial community characteristics during the enrichment of anaerobic ammonium oxidation (ANAMMOX) bacteria, an ASBR reactor was used to culture the ANAMMOX bacteria. The composition, diversity, and species co-occurrence network of the microbial community were investigated under different cultivation times. The results showed that the ANAMMOX bacteria were enriched by gradually increasing the substrate concentration, with removal efficiencies for NH4⁺-N, NO2^--N, and total nitrogen of 97.6%, 95.4%, and 84.9%, respectively. The high-throughput sequencing found that the dominant phyla (relative abundance>5%) were Proteobacteria, Bacteroidetes, Chloroflexi, Planctomycetes, Armatimonadetes, and Actinobacteria in the whole culture process. Candidatus Brocadia was the main ANAMMOX bacteria in the reactor, with its relative abundance increasing from 1.42% to 24.66%. During the cultivation process, the composition of the dominant microbial community did not change, while the relative abundance showed a significant difference (P<0.05). The alpha diversity of the microbial community significantly increased first and then decreased (P<0.05), and the beta diversity of the microbial community was significantly spatially differentiated (R=0.5672, P<0.01) during the culture process. Species network densities were 0.188, 0.068, 0.059, 0.18, and 0.0735 at different times during the culture process. Although the enrichment culture process resulted in weaker correlations between microorganisms, the related group of microorganisms in the phylum Aspergillus became the main node in the network. The enrichment process weakened the correlation between microorganisms; however, the microbial taxa related to the phylum Planctomycetes became the key node in the network.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Bacteria Controlled terms:Nitrogen removal - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Co-occurrence networks - Cultivation process - High-throughput sequencing - Microbial communities - Microbial community structures - Removal efficiencies - Substrate concentrations Classification code:452.4 Industrial Wastes Treatment and Disposal Numerical data indexing:Percentage 1.42e+00% to 2.47e+01%, Percentage 8.49e+01%, Percentage 9.54e+01%, Percentage 9.76e+01% DOI:10.13227/j.hjkx.202005278 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278064 Title:Occurrence and Ecological Risk Assessment of Typical Persistent Organic Pollutants in Hengshui Lake Title of translation:衡水湖沉积物中典型持久性有机污染物污染特征与风险评估 Authors:Zhang, Jia-Wen (1, 2); Wei, Jian (1); Lü, Yi-Fan (1, 3); Duan, Liang (1); Liu, Li (2); Wang, Jian (2); Meng, Shu-Jin (4) Author affiliation:(1) Department of Water Environment Treatment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) College of Environmental Sciences, Liaoning University, Shenyang; 110036, China; (3) College of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing; 100083, China; (4) Hengshui Environmental Monitoring Center, Hengshui; 053000, China Corresponding author:Wei, Jian(weijian0911@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1357-1367 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Sediment samples were collected from 11 typical sites in Hengshui Lake separately in August 2018 and March 2019. Characteristics and ecological risk assessment of typical persistent organic pollutants (POPs), including polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), and polybrominated diphenyl ethers (PBDEs), in these sediments were analyzed. The results showed that the average content of ∑PAHs in sediments of Hengshui Lake was 875.49 ng•g^-1 and 1 010.17 ng•g^-1 in August 2018 and March 2019, respectively. Compared with other regions in China and abroad, ∑PAHs in sediments from Hengshui Lake were at moderate pollution level. Distribution of ∑PAHs varied between different sites, but the values changed within a narrow range in different seasons. Sources of PAHs in sediments from Hengshui Lake were complex, but combustion of wood and coal was the main source, followed by oil pollution. Generally, the ecological risk of PAHs was at a low level. However, fluorene pollution control should be strengthened. For ∑OCPs, the average values in sediments were 35.57 ng•g^-1 and 38.39 ng•g^-1 in August and March, respectively. Compared with other regions, the pollution of ∑OCPs was at a moderate level. In addition, the distribution of ∑OCPs varied a small amount between different sites. There were significant differences between the two seasons. The contents of DDTs in sediments were mainly related to the residual DDTs after long-term soil weathering and the input of recent DDTs sources. Contents of HCHs in sediments were influenced by the use of HCHs in industrial history and inputs of agricultural lindane. Generally, the ecological risk of OCPs was at a medium level, but the DDTs pollution control should be strengthened. For ∑PBDEs, the average values were 1.77 ng•g^-1 and 1.45 ng•g^-1 in the sediments in August 2018 and March 2019, respectively. Compared with other regions, they were at a lower pollution level. The distribution of ∑PBDEs showed small differences between different sites, and did not obviously vary between spring and summer. The PBDEs in sediments were mainly low-bromine PBDEs, which might be contaminated with penta-BDEs from textiles and foams. Additionally, PBDEs were also probably input by distant settlement and migration from the atmosphere, and soil flushing into the lake. PBDEs posed no immediate ecological risk.
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Organic pollutants Controlled terms:Agricultural robots - Coal combustion - Lake pollution - Lakes - Pollution control - Polycyclic aromatic hydrocarbons - Risk assessment - Sediments Uncontrolled terms:Ecological risk assessment - Ecological risks - Organochlorine pesticides - Persistent organic pollutant (POP) - Persistent organic pollutants - Polybrominated diphenyl ether (PBDEs) - Polycyclic aromatic hydrocarbons (PAHS) - Source analysis Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201908036 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278072 Title:Long-term Variation Characteristics of Zooplankton Community Structure in Meiliang Bay, Lake Taihu Title of translation:太湖梅梁湾浮游动物群落结构长期变化特征(1997~2017年) Authors:Yang, Jia (1, 2); Zhou, Jian (2); Qin, Bo-Qiang (2); Quan, Qiu-Mei (1); Li, Yun-Xiang (1) Author affiliation:(1) College of Environmental Science and Engineering, China West Normal University, Nanchong; 637002, 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:Li, Yun-Xiang(yx_li@263.net) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1246-1255 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Zooplankton, as an important part of the water food chain, plays an important role in lake ecosystems. It is an important monitoring indicator for water bodies. However, due to the lack of long-term monitoring data of zooplankton community structure, there is a lack of understanding about its long-term characteristics. Based on monthly monitoring data from 1997 to 2017 of Meiliang Bay in Lake Taihu, the long-term trends of zooplankton community structure and its relation to the environment were examined. The results showed that the abundance and biomass of zooplankton in Meiliang Bay significantly decreased from 1997 to 2017 (P<0.05). In particular, the abundance and biomass of rotifer and copepod slowly declined, and the abundance of cladocerans fluctuated but its biomass presented a significant decreasing trend (P<0.05). The cladocerous biomass contributed the most to the zooplankton biomass in Meiliang Bay. The dominance of smaller cladocerans and copepods increased with decreasing rotifer density, significantly decreasing the average body size of zooplankton (P<0.05). This study indicated that zooplankton were becoming smaller, potentially weakening the top-down control on phytoplankton. In addition, zooplankton abundance and biomass showed an upward trend in spring and decreased in autumn and winter, and reached maximum values of 1 406.70 ind.•L^-1 and 25.64 mg•L^-1, respectively, in September. In the summer, their changes were the opposite. Pearson correlation analysis showed that zooplankton community structure was significantly related to water physical characteristics (alkalinity, electrical conductivity, water depth, suspended substance, and water temperature), chlorophyll a, and nitrogen (P<0.05). This indicated that the eutrophication of Meiliang Bay in Lake Taihu had a significant impact on the community structure of zooplankton.
© 2020, Science Press. All right reserved. Number of references:53 Main heading:Plankton Controlled terms:Biomass - Correlation methods - Ecosystems - Eutrophication - Lakes - Monitoring Uncontrolled terms:Abundance - Community structures - Lake taihu - Miniaturization - Zooplankton Classification code:454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 922.2 Mathematical Statistics Numerical data indexing:Mass_Density 2.56e-02kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201907054 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278145 Title:Effect of Optimized Fertilization and Biochar Application on Phosphorus Loss in Purple Soil Sloping Farmland Title of translation:化肥减量配施生物炭对紫色土坡耕地磷流失的影响 Authors:Luo, Dong-Hai (1); Wang, Zi-Fang (1); Long, Yi (2); Yan, Dong-Chun (2); Xu, Guo-Xing (1); Li, Jiao (1); Gao, Ming (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:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1286-1295 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Phosphorus is an essential nutrient for crop growth, but the input of excess phosphorus is a significant cause of eutrophication. This study explored the relationship between fertilization methods and phosphorus loss in actual production, providing a theoretical basis for scientific fertilization and rational reduction of fertilizer application. In the experiment, a wild-type OD flow plot was used to monitor the occurrence of multiple rainfall runoff and sediment yield in purple soil sloping farmland in 2017-2018. Four different schemes of non-fertilizer treatment, conventional fertilization treatment, optimized fertilization treatment, and reduced fertilization combined with biochar were studied. The effects of soil flow, surface runoff, and sediment phosphorus loss on purple soil sloping farmland were analyzed. The results showed that: ①The total yield of each treatment was optimized (20 737.23 L)>conventional (18 513.17 L)>CK (18 134.58 L)>biochar (13 594.85 L), and the total sediment yield of each treatment was CK (1 998 kg•hm^-2)>biochar (1 884 kg•hm^-2)>optimized (1 681 kg•hm^-2)>conventional (910 kg•hm^-2). The middle stream of soil is the main type of runoff in the rainy season, accounting for 60.14%-87.34% of the total output flow. The total amount of sediment produced by each treatment was not significantly different from that of the conventional treatment (P>0.05). ②The flux of total phosphorus loss in each treatment was characterized by sediment>surface runoff>soil middle flow. Phosphorus lost through the middle stream of soil is the least, accounting for only 2.63%-12.91% of the flux of total phosphorus loss, while the flux of sediment loss of phosphorus can reach 63.74%-78.74%, and thus is the main output route of soil phosphorus loss. ③The application of biochar can effectively reduce the abortion flow in the soil of purple soil sloping land, and the loss flux of orthophosphate in the middle stream, which are 49.94% and 56.45% lower than the conventional treatment, respectively. However, the interception effect on surface runoff is not good, and there is no significant influence on the flux loss of particulate phosphorus. At the same time, the flux of total phosphorus in surface runoff and sediment is significantly increased by 73.28% and 123.53%, respectively, compared with conventional treatment (P<0.05). Therefore, to control the loss of phosphorus in purple soil sloping farmland in southwest China, we should focus on reducing the occurrence of soil sediment loss. Bio-carbon should be further optimized in the practical application of agricultural production with the phosphorus fertilizer input ratio.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Runoff Controlled terms:Agricultural robots - Charcoal - Eutrophication - Farms - Fertilizers - Phosphorus - Sediments - Soils Uncontrolled terms:Agricultural productions - Conventional treatments - Fertilizer applications - Overland flow - Particulate phosphorus - Phosphorus fertilizer - Phosphorus loss - Sloping land Classification code:442.1 Flood Control - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 524 Solid Fuels - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 1.24e+02%, Percentage 2.63e+00% to 1.29e+01%, Percentage 4.99e+01%, Percentage 5.65e+01%, Percentage 6.01e+01% to 8.73e+01%, Percentage 6.37e+01% to 7.87e+01%, Percentage 7.33e+01%, Volume 1.35e-01m3, Volume 5.13e-01m3, Volume 5.95e-01m3, Volume 7.37e-01m3 DOI:10.13227/j.hjkx.201909221 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008925 Title:Vessels' Air Pollutant Emissions Inventory and Emission Characteristics in the Xiamen Emission Control Area Title of translation:厦门市船舶控制区大气污染物排放清单与污染特征 Authors:Wang, Jian (1); Huang, Zhi (1); Liu, Yan-Ying (1); Chen, Sen-Yang (1); Wu, Yan-Cong (1); He, Yue-Yun (1); Yang, Xin-Yi (1) Author affiliation:(1) Xiamen Research Academy of Environmental Science, Xiamen; 361021, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3572-3580 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the automatic identification system (AIS) data and large field survey datasets for Xiamen port, the activity-based approach was used to calculate the emissions from each sailing ship in the Xiamen Emission Control Area (XECA), and to obtain the 2018 air emissions inventory for the XECA. This study subsequently analyzed the emission characteristics and spatiotemporal distribution characteristics of pollutants. The results showed that in 2018, the total amount of pollutants discharged from ships in the XECA was 16 413 t, of which 82.2% were from ships entering and leaving the port and 17.8% were from ships outside of the port. NOx emissions were the highest among all of the pollutants and accounted for 64.2% of the total. Comparing the results of the five modes, emissions at berth were the highest, which was followed by the cruise mode, reduced speed-zone mode and maneuvering mode, and finally, the hoteling mode. In addition, the analysis indicated that the main source of pollutant emissions in Xiamen Port was cargo ships, of which, container ships contributed the most. The peak period of pollutant emissions from ships was between 09: 00 and 16: 00.The emission value during February was the lowest over the year, whereas the highest emission values occurred mostly during March and May. In terms of the spatial distribution, this study revealed that the main channel and port coastline had the highest emission values.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Air pollution Controlled terms:Automatic identification - Emission control - Large dataset - Ships - Spatial distribution Uncontrolled terms:Activity-based - Air pollutant emission - Automatic identification system - Container ships - Emission characteristics - Emission values - Pollutant emission - Spatiotemporal distributions Classification code:451 Air Pollution - 451.2 Air Pollution Control - 921 Mathematics Numerical data indexing:Percentage 1.78e+01%, Percentage 6.42e+01%, Percentage 8.22e+01% DOI:10.13227/j.hjkx.202001067 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517585 Title:Biodegradation of Expanded Polystyrene Foams in Zophobas morio: Effects of Gut Microbiota Title of translation:大麦虫幼虫肠道菌群对聚苯乙烯泡沫塑料降解 Authors:Yang, Li (1, 2); Liu, Ying (2, 3); Gao, Jie (2, 4); Peng, Xia-Wei (1); Bai, Zhi-Hui (2, 4); Zhuang, Xu-Liang (2, 4) Author affiliation:(1) College of Biological Sciences and Technology, Beijing Forestry University, Beijing; 100083, China; (2) Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) School of Life Sciences, University of Science and Technology of China, Hefei; 230026, China; (4) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 101408, China Corresponding author:Gao, Jie(jiegao@rcees.ac.cnemailxiaweipeng@163.com)Peng, Xia-Wei(xiaweipeng@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5609-5616 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Polystyrene (PS) foam is one of the main plastic materials dispersed in the environment. In this study, we observed that the insect-super mealworms (Zophobas morio), which belong to a species of the Tenebrio genus, are able to consume and degrade PS foam. Individual Z. morio consumed an extracellular polymeric substance (EPS) over 50 days with high survival rates. Analyses of the frass egested using fourier transform infrared spectroscopy (FTIR) confirmed the formation of a new oxygen-bearing functional group in the EPS. Gel permeation chromatography (GPC) analyses indicated that the depolymerization of ingested EPS with decreases in both Mw and Mn was observed, suggesting that the EPS was biodegraded. We also used 16S rRNA gene sequences to analyze the gut bacteria of Z. morio under three different feeding conditions, including with polystyrene, bran, and bran plus polystyrene. Under different dietary conditions, the gut microbiota of Z. morio showed significant differences, such as Klebsiella and Citrobacter becoming significantly enriched. In vitro studies using 90-days gut microbial culturing experiments indicated that gut microbiota contributed to PS degradation. Our research demonstrates that intestinal bacteria played an essential role in the degradation of PS by Z. morio, and provides a new theoretical basis and application ideas for the biodegradation of PS.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Biodegradation Controlled terms:Bacteria - Fourier transform infrared spectroscopy - Gel permeation chromatography - Polystyrenes - RNA Uncontrolled terms:16S rRNA gene sequence - Dietary conditions - Expanded polystyrene foams - Extracellular polymeric substances - Feeding conditions - Gel permeation chromatography (GPC) - Intestinal bacteria - Plastic materials Classification code:461.2 Biological Materials and Tissue Engineering - 461.8 Biotechnology - 801 Chemistry - 801.2 Biochemistry - 802.3 Chemical Operations - 815.1.1 Organic Polymers Numerical data indexing:Age 1.37e-01yr, Age 2.47e-01yr DOI:10.13227/j.hjkx.202003273 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517597 Title:Characteristics and Sources of Atmospheric Volatile Organic Compounds Pollution in Summer in Chengdu Title of translation:成都市区夏季大气挥发性有机物污染特征及来源解析 Authors:Xu, Chen-Xi (1); Chen, Jun-Hui (1); Jiang, Tao (1); Han, Li (1); Wang, Bo (1); Li, Ying-Jie (1); Wang, Cheng-Hui (1); Liu, Zheng (1); Qian, Jun (1) Author affiliation:(1) Sichuan Academy of Environmental Sciences, Chengdu; 610000, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5316-5324 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In the research, volatile organic compounds (VOCs) were observed online in urban areas of Chengdu to study VOC concentration level, change characteristics, ozone generation contribution (OFP), and source contribution from June to September 2019. The results showed that the average concentration of TVOCs (total volatile organic compounds) was 112.66 μg•m^-3, with alkanes (29.51%) and halogenated hydrocarbons (23.23%) forming the main components. The diurnal peak in VOCs mainly occurred from 10:00 am to 11:00 am, which is affected by urban motor vehicles, oil or gas volatilization, and industrial emissions. For OFP contribution of VOCs in summer, the contribution rate of aromatic hydrocarbons (42.7%) was the highest, followed by alkenes (27.4%). The key active species were m/p-xylene, ethylene, propylene, o-xylene, isopentane, cyclopentane, and acrolein. According to the source analysis by the PMF model, mobile sources are the main contributors of VOCs in summer in Chengdu, contributing 34% to TVOCs, followed by industrial sources (17%), volatile oil and gas (14%), and solvent use and natural sources contributing 11% and 13%. Therefore, motor vehicle and industrial emissions are the key control sources of VOCs in Chengdu, although control of pollution sources such as solvent use and oil or gas volatilization cannot be ignored.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Pollution control Controlled terms:Aromatic hydrocarbons - Ethylene - Gas chromatography - Gas emissions - Industrial emissions - Volatile organic compounds Uncontrolled terms:Average concentration - Concentration levels - Contribution rate - Halogenated hydrocarbons - Industrial sources - Pollution sources - Source contributions - Total volatile organic compounds Classification code:451.1 Air Pollution Sources - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Percentage 1.40e+01%, Percentage 1.70e+01%, Percentage 2.32e+01%, Percentage 2.74e+01%, Percentage 2.95e+01%, Percentage 4.27e+01%, Percentage 1.10e+01%, Percentage 1.30e+01% DOI:10.13227/j.hjkx.202006040 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517754 Title:Influence Factors of Potential Nitrification Rates and Functional Genes Abundance in the Jinshui River and the Qihe River of the Hanjiang River Basin Title of translation:汉江流域金水河与淇河潜在硝化速率及硝化功能基因的影响因子 Authors:Zhao, Bin-Jie (1, 2); Wang, Xu (1, 3, 4); Zhang, Jian (1, 3, 4); Tan, Xiang (1); He, Rui (1, 2); Zhou, Quan (1, 2); Shi, Hang (1, 2); Zhang, Quan-Fa (1) Author affiliation:(1) Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan; 430074, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Research Center for Ecology and Environment of Qinghai-Tibetan Plateau, Tibet University, Lhasa; 850000, China; (4) College of Science, Tibet University, Lhasa; 850000, China Corresponding author:Zhang, Quan-Fa(qzhang@wbgcas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5419-5427 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In the context of increasing nitrogen loading in river systems worldwide, it is critically important to understand nitrification to maintain river ecosystem health. This comparative study was conducted to explore the relationships among the intensity of human disturbance, environmental factors, potential nitrification rate, and functional gene abundance in the Jinshui River (slightly disturbed basin) and the Qihe River (intensely disturbed basin). The results showed that AOA-amoA gene abundance was higher than that of AOB-amoA. The potential nitrification rate in the Qihe River was higher than that in the Jinshui River. There was no significant difference in AOA-amoA gene abundance between the two rivers; however, the AOB-amoA gene abundance in the Qihe River was significantly higher than that in the Jinshui River in the low flow season. The abundance of nitrification functional genes was significantly correlated with water temperature, pH, NO3^-, NH4⁺, and organic carbon. The potential nitrification rate was positively correlated with water temperature, pH, and NO3^-, and negatively correlated with AOB-amoA gene abundance. These results showed that the intensely disturbed sites had higher potential nitrification rates and nitrification functional genes abundances, and potential nitrification rates and abundances of nitrification function genes were significantly related to physical and chemical water and sediment factors. This study will be important for nitrogen pollution control in the river systems.
© 2020, Science Press. All right reserved. Number of references:58 Main heading:River pollution Controlled terms:Ecosystems - Genes - Nitrification - Nitrogen - Organic carbon - Pollution control - Rivers - Temperature Uncontrolled terms:Comparative studies - Environmental factors - Functional genes - Human disturbances - Nitrogen pollution - Potential nitrification - River ecosystem healths - Water temperatures Classification code:453 Water Pollution - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 641.1 Thermodynamics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.202005031 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517745 Title:Seasonal Variations in Nitrogen and Phosphorus Concentration and Stoichiometry of Hanfeng Lake in the Three Gorges Reservoir Area Title of translation:三峡库区汉丰湖水体氮磷及化学计量比季节变化特征 Authors:Qian, Tian (1); Huang, Qi (2); He, Bing-Hui (1); Li, Tian-Yang (1); Liu, Shu-Jing (1); Fu, Shi (1); Zeng, Rong-Chang (1); Xiang, Ke-Cui (3) Author affiliation:(1) Key Laboratory of Eco-environment in the Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Guiyang Engineering Corporation Limited, PowerChina, Guiyang; 550081, China; (3) Environmental Monitoring Station, Kaizhou District, Chongqing; 405400, China Corresponding author:He, Bing-Hui(hebinghui@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5381-5388 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the seasonal changes in the nitrogen and phosphorus concentrations in Hanfeng Lake from March 2017 to February 2018, the nutrient limitation status was evaluated by the stoichiometric molar ratio of nitrogen and phosphorus. The results showed that the average concentrations of TN, DN, and NO3^--N were 1.60, 1.25, and 0.91 mg•L^-1 in Hanfeng Lake, respectively. The seasonal changes of those indicators were similar, showing the highest concentration in winter and lowest in summer. NO3^--N accounted for TN significantly in the water body, and the concentrations of NH4⁺-N and NO2^--N remained at low levels and changed steadily. The average concentrations of TP, DP, and PO4^3--P were 0.13, 0.09, and 0.06 mg•L^-1, respectively. The changes in the concentrations of TP and DP were similar, showing a trend of increasing in spring and summer, and then decreasing in autumn and winter, while the PO4^3--P concentration showed the trend of fluctuated decrease. TN/TP varied from 11.07 to 56.02, with an average value of 29.23. TN/TP changed seasonally, with the highest value occurring in winter and the lowest value in summer. The conditions of the water body were conducive to growth and reproduction of algae for most of the time during sampling months. The water body was occasionally nitrogen limited and rarely phosphorus limited. The seasonal variation in TN/TP ratio was affected by several factors such as rainfall runoff, fertilizer use, sewage discharge, and aquatic biological activities. Further, protection strategies were proposed for the improvement of the water body in terms of present water quality characteristics in Hanfeng Lake.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Molar concentration Controlled terms:Cell proliferation - Lakes - Molar ratio - Nitrogen - Phosphorus - Reservoirs (water) - Sewage - Water quality Uncontrolled terms:Average concentration - Nitrogen and phosphorus - Nutrient limitations - Protection strategy - Seasonal variation - Sewage discharges - Three gorges reservoir area - Water quality characteristics Classification code:441.2 Reservoirs - 445.2 Water Analysis - 452.1 Sewage - 461.9 Biology - 804 Chemical Products Generally Numerical data indexing:Mass_Density 6.00e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 9.10e-04kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202003297 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952725 Title:Effect of Biochar on Changes of the Temperature Sensitivity of Soil Respiration and Bacterial Community Structure Title of translation:生物质炭影响下土壤呼吸温度敏感性及细菌群落结构的变化 Authors:Cao, Kun-Kun (1); Zhang, Sha-Sha (1); Hu, Xue-Yu (1); Huang, Yang (1) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430078, China Corresponding author:Hu, Xue-Yu(huxueyu@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5185-5192 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the effects of biochar on the temperature sensitivity of soil respiration and microbial community structure, the soil was subjected to an indoor culture test under two major treatments which were control (CK) and the addition of 3% (mass ratio) biochar (BC). Each major treatment contained four temperature conditions. We analyzed the changes in soil CO2emission, the content of different soil organic carbon, and the characteristics of the soil bacterial community. The results showed that: (1)The input of biochar to soil respiration under various temperature conditions was promoted in the early stage and inhibited in the later stage, and after 14 days of cultivation, the input of biochar significantly reduced the temperature sensitivity Q10 values of soil respiration. (2) For soil organic carbon fractions, the decline rate of the content of soil inert organic carbon under the CK treatment increased with increasing temperature, and was sensitive to the changes in temperature. However, the input of biochar significantly reduced the temperature sensitivity of the soil inert organic carbon, and narrowed its decline rate under each temperature condition. The decline rate did not increase with increasing temperature. (3)The 16S rDNA high-throughput sequencing results showed that at the end of the cultivation, the relative abundance of Massilia in the soil of the CK treatment decreased with increasing temperature, and the input of biochar significantly increased its temperature sensitivity, making the decline rate increase. In contrast to Massilia, the relative abundance of Haliangium in soil of the CK treatment increased significantly with increasing temperature, and the input of biochar significantly reduced its temperature sensitivity, rendering the difference of relative abundance between each temperature condition not significant. This study shows that the input of biochar can significantly reduce the temperature sensitivity of soil respiration, which is related to decreased temperature sensitivity of soil inert organic carbon, and the change in the relative abundance of Massilia and Haliangium after the input of biochar.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Soils Controlled terms:Bacteria - Organic carbon - Temperature Uncontrolled terms:Bacterial community structure - High-throughput sequencing - Increasing temperatures - Microbial community structures - Soil bacterial community - Soil organic carbon - Temperature conditions - Temperature sensitivity Classification code:483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 804.1 Organic Compounds Numerical data indexing:Age 3.84e-02yr, Percentage 3.00e+00% DOI:10.13227/j.hjkx.202004160 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952768 Title:Audit Indicators and Suggested Ranges for Data Validation of Chemical Components in Ambient PM2.5: A Case Study of the Yangtze River Delta Title of translation:环境空气PM2.5化学组分监测数据审核指标的建立: 以长三角地区为例 Authors:Zhang, Zhe (1, 2); Qiao, Li-Ping (2); Zhou, Min (2); Zhu, Shu-Hui (2); Guo, Hui-Qin (1, 3); Wang, Hong-Li (2); Lou, Sheng-Rong (2); Tao, Shi-Kang (2); Chen, Chang-Hong (2) Author affiliation:(1) School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang; 330063, China; (2) State Environmental Protection Key Laboratory of the Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang; 330063, China Corresponding author:Qiao, Li-Ping(qiaolp@saes.sh.cnemailguohuiqin@nchu.edu.cn)Guo, Hui-Qin(guohuiqin@nchu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4786-4802 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Diagnostic indicators for the validation of PM2.5compositional data were calculated, based on the monitoring results of approximately 2100 ambient samples collected in the Yangzi River Delta from 2014 to 2017. According to the results of a correlation analysis, we propose that the audit indexes of the monitoring data of PM2.5 components in ambient air should include: equivalent ratios of anion-cation charge balance(A/C), the consistency between sum of all measured components(Σspecies) and weighed PM2.5, the consistency between mass reconstructed PM2.5(PM2.5, reconstructed) and weighed PM2.5, the chemical consistency between elemental S and water-soluble SO4^2-, elemental K and water-soluble K⁺, and the chemical consistency of theoretical and tested NH4⁺. The double-sided 95% reference ranges of anion-cation equivalent balance (A/C), Σspecies/PM2.5, PM2.5, reconstructed/PM2.5, S/SO4^2-, and K/K⁺ ratios were determined in terms of P2.5 and P97.5 as follows: (0.82, 1.35), (0.63, 0.94), (0.62, 1.00), (0.28, 0.50), and (0.66, 2.31). These diagnostic indicators were helpful for judging the errors of chemical component analysis and retain seasonal variation stability. In most cases, NH4⁺ existed in the form of NH4NO3 and (NH4)2SO4 in spring and summer. With the approach of autumn and winter, it transformed to NH4NO3, (NH4)2SO4, and NH4Cl. The results of literature verification showed the pass rate of A/C was 87.1% and the rate of other indexes was 100%, indicating that the above audit indexes we propose could be applied to not only the Yangzi River Delta but the entire country. Furthermore, there were certain conditions in applying the diagnostic indicators. The S/SO4^2- ratio worked well with PM2.5≥40 μg•m^-3 in summer and with 60 μg•m^-3≤PM2.5≤140 μg•m^-3 in spring, autumn, and winter. Other audit indexes were available universally in all weathers under the condition of PM2.5≥60 μg•m^-3.
© 2020, Science Press. All right reserved. Number of references:75 Main heading:Indicators (chemical) Controlled terms:Chemical analysis - Chemical stability - Nitrogen compounds - Positive ions - Rivers - Springs (components) Uncontrolled terms:Chemical component - Correlation analysis - Diagnostic indicators - Equivalent ratios - Monitoring results - Reference range - Seasonal variation - Yangtze river delta Classification code:601.2 Machine Components - 801 Chemistry Numerical data indexing:Percentage 1.00e+02%, Percentage 8.71e+01%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202003313 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953490 Title:Effects of Heavy Metal Contents on Phyllosphere and Rhizosphere Fungal Communities for Bothriochloa ischaemum in Copper Tailings Area Title of translation:铜尾矿白羊草重金属含量对叶际和根际真菌群落的影响 Authors:Jia, Tong (1); Guo, Ting-Yan (1); Wang, Rui-Hong (1); Chai, Bao-Feng (1) Author affiliation:(1) Shanxi Key Laboratory of Ecological Restoration on Loess Plateau, Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5193-5200 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:There are complex interrelationships between plant microorganisms (phyllosphere and rhizosphere) and host plants, which can promote plant growth and enhance the tolerance of host plants to stress. In this study, we selected the dominant species Bothriochloa ischaemum as the research subject in a copper tailings dam. Using high-throughput sequencing, we investigated the structures of the fungal communities and diversities in the phyllosphere and rhizosphere of B. ischaemum. This study also explored the effects of heavy metal content on fungal community characteristics. The results showed that Ascomycota and Basidiomycota were the dominant phyla in the phyllosphere and rhizosphere of B. ischaemum. The diversities and richness of the rhizosphere fungal community were higher than that of the phyllosphere fungal community. The diversities of rhizosphere and phyllosphere fungal communities was affected by different heavy metals. Phyllosphere fungal diversity was mainly affected by the content of Zn and Cu in leaves, and the content of Pb in roots was the key factor affecting the diversity of the rhizophere fungal community. Furthermore, Pleosporaceae had a very significant positive correlation with Cd in the phyllosphere, and Nectriaceae had a significant positive correlation with Zn in the rhizosphere. These fungal communities could be used as indicators of ecological recovery in areas with heavy metal pollution. The results could provide an ecological basis for the exploration and utilization of phyllosphere or rhizosphere fungi resources during ecological restoration processes. This study also provides guidance for selecting the plant-microbial symbionts during ecological restoration in areas with heavy metal pollution.
© 2020, Science Press. All right reserved. Number of references:51 Main heading:Fungi Controlled terms:Copper - Ecosystems - Heavy metals - Metal recovery - Pollution - Restoration - Soils - Zinc Uncontrolled terms:Ecological recoveries - Ecological restoration - Fungal diversity - Heavy metal contents - Heavy metal pollution - High-throughput sequencing - Positive correlations - Research subjects Classification code:454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 544.1 Copper - 546.3 Zinc and Alloys DOI:10.13227/j.hjkx.202004239 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952728 Title:Microbial Diversity and Influencing Factors in a Small Watershed in Winter Title of translation:冬季小流域水体微生物多样性及影响因素 Authors:Zhu, Jin-Shan (1, 2); Qin, Hai-Lan (2); Sun, Qi-Yao (1, 2); Wang, Bao-Zhen (1, 2); Gao, Run-Xia (3); Guo, Rui-Li (4); Li, Wu-Bin (1, 2) Author affiliation:(1) Research Center for Environmental Monitoring, Hazard Prevention of Three Gorges Reservoir, Yangtze Normal University, Chongqing; 408100, China; (2) Green Intelligence Environmental School, Yangtze Normal University, Chongqing; 408100, China; (3) Chongqing Institute of Geology and Mineral Resources, Chongqing; 400042, China; (4) Puyang Institute of Environmental Protection Sciences, Puyang; 457000, China Corresponding author:Li, Wu-Bin(liwubincq@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5016-5026 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The water quality of a small watershed will directly affect the water quality safety of the entire watershed. The Lidu small watershed of the Fulin District in Chongqing was selected for this study. The characteristics of runoff and the microbial community in the receiving water body were analyzed by high-throughput sequencing technology. The effects of the physical and chemical factors of the water body on the microbial diversity in the water body were also investigated. The results showed that the small watershed of Lidu was an important source of nitrite and dissolved organic carbon for the receiving water. There was no significant difference in the microbial richness and diversity of the water flowing through different pollution sources in the small watershed, and the microbial diversity index was negatively correlated with the total phosphorus (r -0.79--0.84, P≤0.01) and phosphate (r -0.71--0.80, P≤0.01) of the water. At the phylum level, Actinobacteria (37.33%±14.69%) accounted for the largest proportion of runoff flowing through the agricultural area, followed by Proteobacteria (32.53%±7.18%), Cyanobacteria (14.65%±22.64%), Bacteroidetes (8.50%±3.67%), and others. Proteobacteria (43.67%±10.80%) accounted for the largest proportion of runoff flowing through the industrial area, followed by Bacteroidetes (25.33%±11.97%), Actinobacteria (24.17%±14.66%), Firmicutes (2.53%±0.72%), and others. At the genus level, hgcI_clade (19.08%±13.46%) accounted for the largest proportion of runoff flowing through the agricultural area, followed by CL500-29_marine_group (7.40%±4.44%), Limnohabitans (7.05%±3.14%), and others. Flavobacterium (20.40%±12.37%) accounted for the largest proportion of runoff flowing through the industrial area, followed by hgcI_clade (15.30%±11.11%), Acinetobacter (9.33%±11.50%), and others. The Flavobacterium in the runoff water may be related to the input of industrial sources in the watershed. Nitrous nitrogen, total phosphorus, phosphate, pH, and Zn²⁺ were the main environmental factors that affected the microbial community in the small watershed. They can explain the variance of microbial community 0.26, 0.21, 0.20, 0.15, and 0.14, respectively. DOC, nitrate nitrogen, and heavy metal ions such as Cu²⁺, Zn²⁺, Mn²⁺, and As³⁺ were also related to the proportion of some microorganisms in the water.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Water pollution Controlled terms:Agricultural robots - Agricultural runoff - Agriculture - Heavy metals - Manganese removal (water treatment) - Metal ions - Microorganisms - Organic carbon - Water quality - Watersheds Uncontrolled terms:Agricultural areas - Dissolved organic carbon - Environmental factors - High-throughput sequencing - Industrial sources - Microbial communities - Microbial diversity - Receiving water bodies Classification code:444.1 Surface Water - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 453 Water Pollution - 453.1 Water Pollution Sources - 461.9 Biology - 531 Metallurgy and Metallography - 531.1 Metallurgy - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes DOI:10.13227/j.hjkx.202003045 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071286 Title:Tolerance Mechanism and Cadmium Enrichment Abilities in Two Brassica napus L. Cultivars Title of translation:两种不同镉富集能力油菜品种耐性机制 Authors:Bian, Jian-Lin (1); Guo, Jun-Mei (2, 3); Wang, Xue-Dong (1); Yang, Jun-Xing (2, 3); Yang, Jun (2, 3); Chen, Tong-Bin (2, 3); Cao, Liu (4); Cheng, Yong-Xia (4); Ren, Zhan-Hong (4); Wang, Jie (5); X.-Y., Zhou Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Center for Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Key Laboratory for Monitor and Remediation of Heavy Metal Polluted Soils of Henan Province, Jiyuan; 459000, China; (5) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (6) Beijing Ruimeide Environmental Restoration Co., Ltd., Beijing; 100015, China Corresponding author:Yang, Jun-Xing(yangajx@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:970-978 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A hydroponic experiment was conducted to explore the differences in growth status and Cd accumulation characteristics of two Brassica napus L. cultivars (QY-1 and SYH) under different concentrations of cadmium (Cd) stress (0, 2, and 5 mg•L^-1). The Cd subcellular compartmentalization and antioxidant enzyme activities were determined to elucidate the intrinsic mechanism of the differences in the Cd accumulation capacity between the two cultivars of Brassica napus L. Furthermore, field trials were conducted to further verify the differences in phytoremediation of the two cultivars. Results show that neither of the cultivars exhibited obvious growth inhibition under Cd stress. Under the 2 mg•L^-1 Cd condition, there were no significant differences in shoot Cd concentrations between the two cultivars. Under 5 mg•L^-1 Cd condition, however, the Cd concentrations in both shoot and root of SYH were significantly higher than that of QY-1, which increased by 32.05% and 99.57%, respectively. In addition, the bioconcentration factor (BCF) of the root in SYH is significantly higher than that of QY-1. The subcellular Cd distribution in leaves of the two cultivars of Brassica napus L. showed that, with an increase of Cd stress, Cd concentrations of heat stable protein (HSP) and metal-rich granule (MRG) fractions in leaves significantly increased by 143. 69% and 118. 91% for QY-1, and by 63.34% and 118.91% for SYH. Thus, the segregation of Cd in HSP and MRG, which was reported to be biological detoxified metal fractions (BDM), might play an important role in the detoxification of Brassica napus L. at a subcellular level under Cd stress. Moreover, the distribution of Cd in the cellular debris fraction might be another important factor contributing to the differences in Cd accumulation of the two Brassica napus L. cultivars, which was 4.41 times higher in SYH than in QY-1 under Cd stress. The results of the antioxidant enzyme activities of two Brassica napus L. cultivars showed that, under the 5 mg•L^-1 Cd condition, the antioxidant enzyme system may represent an important detoxification mechanism for QY-1 to cope with stress induced by high concentrations of Cd, while SYH is more effective in reducing the toxicity of Cd by separation of Cd into BDM fractions. The results of the field trial confirmed that the Cd concentrations in the above- and underground parts of SYH were 2.34 and 1.43 times higher than in QY-1, respectively. Therefore, SYH possess a higher Cd phytoextraction capacity than QY-1, and might be a good candidate for the remediation of moderate and mildly Cd-contaminated farmland.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Cadmium Controlled terms:Adsorption - Antioxidants - Bioremediation - Detoxification - Enzymes - Fits and tolerances - Plants (botany) - Soil pollution control Uncontrolled terms:Antioxidant enzyme activity - Bioconcentration factor - Brassica Napus L - Cadmiums (Cd) - Detoxification mechanism - Hydroponic experiments - Sub-cellular - Tolerance mechanisms Classification code:454.2 Environmental Impact and Protection - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3 Chemical Operations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally Numerical data indexing:Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.19e+02%, Percentage 3.20e+01%, Percentage 6.33e+01%, Percentage 6.90e+01%, Percentage 9.10e+01%, Percentage 9.96e+01% DOI:10.13227/j.hjkx.201906175 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070638 Title:Evaluation and Source of Heavy Metal Pollution in Surface Soil of Qinghai-Tibet Plateau Title of translation:青藏高原表土重金属污染评价与来源解析 Authors:Yang, An (1, 2); Wang, Yi-Han (1, 2); Hu, Jian (3); Liu, Xiao-Long (2); Li, Jun (2) Author affiliation:(1) College of Geography and Environmental Science, Tianjin Normal University, Tianjin; 300387, China; (2) Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin; 300387, China; (3) Skate Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Li, Jun(lijun5931@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:886-894 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Spatial distribution and source apportionment of heavy metals in the surface soil of the Qinghai-Tibet Plateau was investigated to gain an understanding of the pollution characteristics. The surface soil (0-20 cm) samples were collected from the northeast to the southwest in the study area. The total amount of 13 heavy metals (Ba, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sb, Sc, and Zn) was determined. The potential sources of heavy metals were preliminarily apportioned and identified by the principal component analysis-absolute principal component score-multiple linear regression (PCA-APCS-MLR) receptor model. Results show that the average contents of Cd and Sb significantly exceed the environment standard, and they were 2.13 and 1.52 higher than the soil background values of the Qinghai-Tibet Plateau in the 1970s, respectively. The enrichment factor (EF), geo-accumulation index (Igeo), and Nemero synthesis index (PN) were used to evaluate the surface soil heavy metal contamination, which indicated that Cd and Sb also were pollutants in the Qinghai-Tibet Plateau with a limited pollution level. Various levels of pollution were presented at the central, southeastern, and northeastern regions of the Qinghai-Tibet Plateau, while the central and southeastern areas exhibited relatively severe pollution levels. The PCA-APCS-MLR levels revealed that three main sources of heavy metals in the soil of the Qinghai-Tibet Plateau were the natural source, traffic activities, and the mining industry, in that order. Cobalt, Cr, Cu, Fe, Mn, Ni, and Sc, were largely affected by natural sources, while Ba, Cd, Mo, and Pb were mainly affected by traffic activities. Specifically, Zn gave priority to natural and traffic sources, and Sb was jointly affected by natural sources, traffic activities, and the mining industry. Therefore, Sb and Cd pollution from traffic activities and the mining industry should be noted in control plans for the heavy metal pollution in soil of the Qinghai-Tibet Plateau.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Soil pollution Controlled terms:Elementary particle sources - Heavy metals - Linear regression - Soil pollution control - Soils Uncontrolled terms:Environment standards - Geo-accumulation index - Heavy metal pollution - Multiple linear regressions - Qinghai Tibet plateau - Receptor model - Source apportionment - Surface soil Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 922.2 Mathematical Statistics Numerical data indexing:Size 0.00e+00m to 2.00e-01m DOI:10.13227/j.hjkx.201907195 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070905 Title:Operation and Maintenance of Cost-Effective Volatile Organic Compounds Abatement Alternatives Title of translation:挥发性有机物污染控制方案的运行费用效能比较 Authors:Qiang, Ning (1); Shi, Tian-Zhe (1); Miao, Hai-Chao (1) Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:638-646 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Presently, volatile organic compounds (VOCs) pollution control in China has entered the deep-water zone, facing difficult challenges. The cost-effectiveness of VOCs abatement alternatives will determine the final environmental benefits. Screening of abatement alternatives with good cost-effectiveness and performance is important to form a sound basis for VOCs emission abatement work to create sustainable and stable alternatives. In this study, 12 typical emission scenarios are set up based on the emission characteristics of pollution sources, such as emission concentration, airflow volume, continuous or intermittent emissions, and fluctuations in concentration. Based on these typical scenarios, the operation costs of current mainstream emission abatement alternatives is estimated, and a cost-effectiveness comparison is made using the unit abatement cost (UAC, yuan•kg^-1, VOCs) as the index. The results obtained can provide a reference for choosing appropriate VOCs abatement alternatives according to the characteristics of VOCs emission. Results show that for low concentration VOCs, the UAC of emission abatement is normally more than 8 yuan•kg^-1. The concentration in the process plays an important role in reducing UAC. Therefore, the reasonable collection of VOCs gas, resulting in smaller emission volume and higher concentration, has a significant impact on the subsequent emission abatement cost-effectiveness. Enhancing the classification collection of VOCs to improve resource attributes of the recovered VOCs liquid is also an effective way to improve the cost effectiveness of VOCs abatement.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Costs Controlled terms:Cost effectiveness - Operating costs - Volatile organic compounds - Water pollution - Water pollution control Uncontrolled terms:Emission abatement - Emission characteristics - Emission concentration - End-pipe treatment - Environmental benefits - Low concentrations - Operation and maintenance - VOCs abatement Classification code:453 Water Pollution - 453.2 Water Pollution Control - 804.1 Organic Compounds - 911 Cost and Value Engineering; Industrial Economics - 911.2 Industrial Economics DOI:10.13227/j.hjkx.201907029 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278128 Title:Aerobic Granular Sludge System with Multiple Influent-Aeration Operation Strategy Title of translation:多次进水-曝气的好氧颗粒污泥系统实验 Authors:Zhang, Jie (1, 2); Wang, Yu-Ying (1); Li, Dong (1); Liu, Zhi-Cheng (1); Cao, Si-Yu (1) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil 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:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1409-1417 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:SBR reactors R1 and R2 were used to inoculate activated sludge from a sewage treatment plant, and domestic sewage was used as the influent. The operation was carried out using a single and multiple influent-aeration operation strategy, respectively, and the particle size change and removal effect during the operation was studied. The results show that R1 and R2 successfully achieved sludge granulation after 56 days and 39 days of operation, respectively. The concentrations (mg•L^-1) of chemical oxygen demand, total nitrogen, and total phosphorus (TP) in the effluent of R1 and R2 after stable operation were 29.7, 13.7, 0.31, 19.2, 8.1, and 0.37, respectively. The removal rates were respectively 87.7%, 75.6%, 95.1%, and 90.1%, 85.6%, and 94.2%, and the average particle size of the particles reached 740 μm for R1 and 791 μm for R2. The results showed that for the same running time, the effluent NO3^--N concentration and TP concentration in R2 were lower than those in R1. In the later stage of operation, the ratio of denitrifying phosphorus-accumulating organisms (DPAO) to total phosphorus-accumulating organisms (PAOs) in R1 and R2 increased from an initial 11.17% to 25.47% and 34.08%, respectively. Compared with the one influent-aeration operation strategy, the multiple influent-aeration operation strategy had a lower concentration of NO3^--N in the initial stage of the startup, the PAOs received less impact, the DPAO enrichment was better, the phosphorus removal performance was better, and it helped to form aerobic granular sludge.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Sewage aeration Controlled terms:Activated sludge process - Chemical oxygen demand - Effluents - Granular materials - Nitrogen removal - Particle size - Phosphorus - Sewage - Sewage treatment plants Uncontrolled terms:Aerobic granular sludges - Average particle size - Denitrifying phosphorus accumulating organisms - Domestic sewage - Nitrogen and phosphorus removal - Operation strategy - Particle size change - Phosphorus removal Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Age 1.07e-01yr, Age 1.53e-01yr, Percentage 1.12e+01% to 2.55e+01%, Percentage 3.41e+01%, Percentage 7.56e+01%, Percentage 8.56e+01%, Percentage 8.77e+01%, Percentage 9.01e+01%, Percentage 9.42e+01%, Percentage 9.51e+01%, Size 7.40e-04m, Size 7.91e-04m DOI:10.13227/j.hjkx.201909217 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278161 Title:Assessment and Spatial Characteristics Analysis of Human Health Risk of Heavy Metals in Cultivated Soil Title of translation:耕地土壤重金属健康风险空间分布特征 Authors:Ji, Chao (1); Hou, Da-Wei (1); Li, Fa-Zhi (1); Bao, Guang-Jing (2); Deng, Ai-Ping (3, 4); Shen, Hong-Jun (3, 4); Sun, Hua (1) Author affiliation:(1) College of Public Administration, Nanjing Agricultural University, Nanjing; 210095, China; (2) College of Urban and Environment, Yunnan University of Finance and Economics, Kunming; 650221, China; (3) Jiangsu Environmental Monitoring, Nanjing; 210036, China; (4) Jiangsu Key Laboratory of Environment and Health, Nanjing; 210036, China Corresponding author:Hou, Da-Wei(dawei900531@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1440-1448 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Spatial characteristics analysis of the human health risk posed by heavy metals in cultivated soils is of great significance, with the potential to prevent and control soil pollution, protect human health, provide a basis for risk management, etc. In this paper, a methodological system, including a USEPA health risk assessment model, differentiation and factor detector within a geographical detector, and optimized initial model of rank-size theory, was constructed from a geographical perspective. Taking a city in Jiangsu province as the research object, we obtained the spatial differentiation and relative level of human health risk of Cr, Pb, Hg, and Cd in cultivated land by using the methodological system constructed and SPSS and ArcGIS software. The average concentrations of heavy metals (mg•kg^-1) in the research area were Cr (65.207 mg•kg^-1), Pb (25.486 mg•kg^-1), Cd (0.238 mg•kg^-1), and Hg (0.045 mg•kg^-1), which were lower than the risk control standards for soil contamination of agricultural land in China. The children's non-cancer risk of Cr and Pb and the cancer risk to children and adults of Cr were 2.914 385, 1.337 503, 4.312 679×10^-6, and 8.137 130×10^-6, respectively, all of which exceeded the maximum acceptable limit in the research. Meanwhile, the spatial differentiation (q) of heavy metal health risk was between 0.005 523 and 0.204 238, which indicated that the high health risk posed by heavy metals should be paid attention to. The health risk rankings (R) of the children's non-cancer risk of Cr and Pb and the cancer risk of Cr in subregions 1, 2, 3, and 4 approached or exceeded 1, and were higher than in subregions 5, 6, and 7, for which R was lower than 0.1. The R values indicated than the high health risk is concentrated in the research region. This research has great significance in measuring the health risk of heavy metals in cultivated soil at different scales, and in forming control strategies with local conditions.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Soil pollution Controlled terms:Agricultural robots - Cadmium - Chromium - Diseases - Health risks - Land use - Lead - Learning to rank - Risk assessment - Risk management - Soil pollution control - Soils - Spatial variables measurement Uncontrolled terms:Average concentration - Cultivated lands - Human health risks - Rank-size theory - Soil contamination - Soil heavy metals - Spatial characteristics - Spatial differentiation Classification code:403 Urban and Regional Planning and Development - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 543.1 Chromium and Alloys - 546.1 Lead and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1 Accidents and Accident Prevention - 943.2 Mechanical Variables Measurements DOI:10.13227/j.hjkx.201908163 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278164 Title:Physical and Chemical Characteristics of Atmospheric Particles in Autumn in Mt. Huangshan Title of translation:黄山秋季大气颗粒物理化特性 Authors:Bian, Yi-Shu (1); Yin, Yan (1); Wang, Hong-Lei (1); Chen, Kui (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Yin, Yan(yinyan@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1056-1066 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the physical and chemical characteristics of single-particle aerosols in the background area of east China, a single-particle time-of-flight mass spectrometer (SPAMS) was used to observe the atmospheric particles in Mt. Huangshan from September 5, 2012 to October 28, 2012 and explore the influence of different air masses on the types and proportions of particles in combination with the HYSPLIT backward trajectory model. The results showed that the particles in Mt. Huangshan area can be divided into nine categories: Aged-EC, K, ECOC, OC, NaK, EC, ECHM, HM, and Minerals. Aged-EC accounted for the highest proportion, followed by K, and the aging degree of carbon particles was critical. The carbon particles classified as Aged-EC, ECOC, and OC were concentrated in the accumulation mode (0.2-1.4 μm), whereas HM, NaK, and Minerals were concentrated in the coarse particle mode (>1.4 μm). Apart from K, ECHM, and ECOC, higher wind speed was unfavorable to the accumulation of particles. The higher RH was, the higher the proportion of carbon particles was, while the proportions of K, OC, Minerals, and NaK were smaller. Cluster analysis results showed that the Mt. Huangshan area was mainly affected by northwest air mass, marine air mass, and local air mass. Industrial emissions and coal-burning activities in the surrounding areas were the primary contribution sources of Aged-EC.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Particle size analysis Controlled terms:Atmospheric chemistry - Binary alloys - Carbon - Cluster analysis - Inductively coupled plasma - Industrial emissions - Mass spectrometers - Meteorology - Minerals - Particles (particulate matter) - Size distribution - Sodium alloys - Sodium metallography - Wind Uncontrolled terms:Accumulation modes - Atmospheric particles - Backward trajectory - Mass spectral - Mt. Huangshan - Physical and chemical characteristics - Primary contribution - Time-of-flight mass spectrometers Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 482.2 Minerals - 549.1 Alkali Metals - 723 Computer Software, Data Handling and Applications - 804 Chemical Products Generally - 922.2 Mathematical Statistics - 932.3 Plasma Physics - 951 Materials Science Numerical data indexing:Size 2.00e-07m to 1.40e-06m DOI:10.13227/j.hjkx.201906185 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796273 Title:Fate Simulation of 2, 4, 4'-Trichlorobiphenyl in the Bohai Rim Using the Multimedia Model Title of translation:环渤海地区2, 4, 4'-三氯联苯的多介质归趋模拟 Authors:Zhang, Yi (1, 2); Ma, Yan-Fei (3); Song, Shuai (2, 4); Lü, Yong-Long (2, 4, 5); Zhang, Sheng (5); Wu, Qiang (2) Author affiliation:(1) School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo; 255049, 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 Resources and Environmental Engineering, Shandong University of Technology, Zibo; 255049, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China; (5) School of Environmental & Natural Resources, Renmin University of China, Beijing; 100872, China Corresponding author:Ma, Yan-Fei(fair966@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2625-2634 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the multimedia transfer and fate of polychlorinated biphenyls (PCBs) in the Bohai Rim, we used the BETR-Urban-Rural model to simulate and calculate the concentration distribution, fate distribution, and transfer processes of 2, 4, 4'-trichlorobiphenyl (PCB28) in nine environmental compartments under a steady-state assumption. The input parameters and output results of the model underwent sensitivity analysis and uncertainty analysis, respectively. The results showed that the simulated concentrations of PCB28 in fresh water, rural soil, urban soil, and sediment could fit the measured concentrations well, thus verifying the reliability of the model. The concentration of PCB28 in urban soil was the highest, and the average concentration was 5.26×10^-6 mol•m^-3. In contrast, the concentration of PCB28 in rural air was the lowest, and the average concentration was 5.79×10^-14 mol•m^-3. When the environmental system reached equilibrium, the largest sink of PCB28 in the Bohai Rim was soil, accounting for approximately 96.45% of the total amount remaining in the system. The mutual transfer processes between air and other environmental compartments were the dominant pathways for PCB28 inter-media transport in the Bohai Rim. Most PCB28 entering the Bohai Sea was transferred by airflow, and the fluxes from rural air to coastal water accounted for approximately 97.22% of the total fluxes of PCB28 entering the sea. According to the result of sensitivity analysis, the emission rates, grid dimensions, and transport velocity were the key parameters affecting the model output. Uncertainty analysis showed that the distributions of PCB28 concentrations in rural air and urban air fitted well with lognormal distributions, and the coefficients of variances (CVs) were 0.44 and 0.41, respectively.
© 2020, Science Press. All right reserved. Number of references:53 Main heading:Uncertainty analysis Controlled terms:Organic pollutants - Polychlorinated biphenyls - Rural areas - Sensitivity analysis - Soils Uncontrolled terms:Average concentration - Coefficients of variances - Concentration distributions - Environmental compartment - Environmental systems - Log-normal distribution - Multimedia modeling - Polychlorinated biphenyl (PCBs) Classification code:483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 921 Mathematics - 922.1 Probability Theory Numerical data indexing:Percentage 9.65e+01%, Percentage 9.72e+01% DOI:10.13227/j.hjkx.201911140 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990459 Title:Ecological Stoichiometry of Carbon, Nitrogen, and Phosphorus in Subtropical Paddy Soils Title of translation:亚热带稻田土壤碳氮磷生态化学计量学特征 Authors:Song, Jia-Ling (1); Sheng, Hao (2); Zhou, Ping (3); Duan, Liang-Xia (1); Zhou, Qing (1); Zhang, Yang-Zhu (2) Author affiliation:(1) College of Resources & Environment, Hunan Agricultural University, Changsha; 410128, China; (2) Institute of Soil Science, Hunan Agricultural University, Changsha; 410128, China; (3) Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China Corresponding author:Sheng, Hao(shenghao82@hunau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:403-411 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study aims to understand the existence of stable soil organic carbon (C), nitrogen (N), and phosphorus (P) ratios in paddy soil. Based on a field soil survey database, the ecological stoichiometry of the C:N:P ratio of 110 subtropical paddy soil profiles and 587 genetic horizons were analyzed at a regional scale. Relevant analysis and redundancy analysis (RDA) are used to study the relationships between C:N:P ratios and soil-environmental factors (topography, parent materials, soil genetic horizons, soil groups, soil physical, and chemical properties). The results showed that the weighted averages of C:N, C:P, and N:P in paddy soils of subtropical regions were 12.6, 49, and 3.9, respectively, and C:N:P was 38:3.2:1. The C:N of paddy soil did not vary significantly with parent materials, soil groups, or genetic horizons. However, the C:P and N:P variations were significantly different, and the mean values of the two were much lower than global ratios (186 and 13.1) and average levels of C:P and N:P in Chinese soils (136 and 9.3). Although the C:N:P ratio in the paddy soil profile was relatively unstable, the topsoil C:N (14.2) was relatively stable due to the strong interaction between the topsoil and the environment. This reflects the close coupling of C and N in the topsoil of paddy fields under long-term anthrostagnic maturation. However, in the paddy soil profile, C:P and N:P were not stable, and there was no significant correlation between soil organic carbon (SOC) and total P content, total N, or total P content, which suggests that environmental changes may lead to soil C:N:P decoupling. It was found that topography, soil texture, iron oxide, and bulk density are all key soil-environmental factors that regulate the soil profile of rice paddy C:N:P.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Soils Controlled terms:Chemical analysis - Ecology - Iron oxides - Nitrogen - Organic carbon - Phosphorus - Soil surveys - Stoichiometry - Textures - Topography - Tropics Uncontrolled terms:Ecological stoichiometry - Environmental change - Environmental factors - Redundancy analysis (RDA) - Soil organic carbon - Strong interaction - Subtropical regions - Weighted averages Classification code:443 Meteorology - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 801.4 Physical Chemistry - 804 Chemical Products Generally - 951 Materials Science DOI:10.13227/j.hjkx.201906169 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796387 Title:Emission Characteristics of the Catering Industry in Beijing Title of translation:北京市餐饮业大气污染物排放特征 Authors:Sun, Cheng-Yi (1); Bai, Hua-Hua (1); Chen, Xue (1); Zhai, Yi-Fei (2); Gao, Qi-Tian (2); He, Wan-Qing (1); Nie, Lei (1); Shi, Ai-Jun (1); Li, Guo-Ao (1) Author affiliation:(1) Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Pollution Control and Application, National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) Beijing Tongzhou Municipal Ecological Environment Bureau, Beijing; 101101, China Corresponding author:Li, Guo-Ao(liguoao@cee.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2596-2601 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The emissions of the catering industry are important sources of air pollution in megacities in China. A total of 41 restaurants in Beijing were selected as the sampling sites to evaluate the contribution of the catering industry to megacity air pollution. The original emissions load of cooking fume, particulate matter, and non-methane hydrocarbon (NMHC) were studied via field tests for different types of restaurants. The results showed that the cooking fume, particulate matter, and NMHCs generated from the kitchen were 1.93, 6.6, and 10.9 mg•m^-3, respectively. An evaluation method based on working days was developed. Considering the total number of restaurants in Beijing, the original emission loads of 2019 were calculated. The cooking fume, particulate matter, and NMHC emissions were 5 512, 18 849, and 6 169 t, respectively. The Pearson numbers of the cooking fume emission and particular matter emission from Sichuan and Hunan cuisine, Roast Duck, Grill and Barbecue, and Chinese Home-Style cuisine were all above 0.6, which indicated a high level of correlation between the cooking fume emission and particular matter emission. Notably, the Pearson numbers of Sichuan and Hunan cuisine and Roast Duck were both higher than 0.8, which indicates a strong correlation between the cooking fume emission and particular matter emission.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Particulate emissions Controlled terms:Air pollution - Calcination - Particles (particulate matter) Uncontrolled terms:Air pollution in megacities - Catering industries - Emission characteristics - Fume emissions - Non-methane hydrocarbons - Particulate Matter - Sampling site - Strong correlation Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 802.3 Chemical Operations - 951 Materials Science DOI:10.13227/j.hjkx.201911076 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990484 Title:Occurrence Relationship Between Microplastics and Heavy Metals Pollutants in the Estuarine Sediments of Poyang Lake and the Yangtze River Title of translation:鄱阳湖湖口-长江段沉积物中微塑料与重金属污染物的赋存关系 Authors:Li, Wen-Hua (1); Jian, Min-Fei (1, 2); Liu, Shu-Li (1); Jiang, Yu-Mei (1); Deng, Yan-Bing (1); Zhu, Lin (1) Author affiliation:(1) Jiangxi Provincial Key Laboratory of Protection and Utilization of Subtropical Plant Resources, College of Life Science, Jiangxi Normal University, Nanchang; 330022, China; (2) Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang; 330022, China Corresponding author:Jian, Min-Fei(jianminfei0914@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:242-252 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Heavy metals are typical pollutants in the environment and microplastics are relatively newly recognized environmental pollutants, with their coexistence potentially compounding pollution and ecological risks. In this study, we investigate the contents and morphological characteristics of microplastics and heavy metals (Cu, Cd, Pb, Zn, and Cr) in the estuarine sediments of Poyang Lake and the Yangtze River as a means of exploring the relationship between them. The results showed that the abundance of microplastics ranged from 356 n•kg^-1 to 1 452 n•kg^-1, with an average abundance of 982.33 n•kg^-1 in the dry sediments. Microplastics were identified as being of three main types: fragments, fibers, and films, whereby fragments were the most dominant type found and accounted for 48.23% of the total microplastics in the sediments. The main color of microplastics in the sediments was chromatic, and the particle size of most microplastics was<1 mm. The major polymer components were polyethylene (PE), low density polyethylene (LDPE), and polyethylene (PP). Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) results indicated that the surfaces of microplastics were rough, porous, cracked, and torn, and that the five heavy metals were found on the surfaces of different microplastics. These heavy metals accumulated to different degrees in the estuarine sediments, and redundancy analysis indicated that environmental factors [including the total organic carbon (TOC), pH, electrical conductivity (EC), and sediment particle size] and the occurrence of microplastics all had significant (P<0.05) effects on the distribution of heavy metal concentrations in sediments. Variation partitioning analysis (VPA) showed that the contribution rates of environmental factors and microplastics to the bioavailability of heavy metals were 37.70% and 0.70% respectively, but the combined effect was 49.60%. We conclude that microplastics in sediments may act as carriers of heavy metals and activate their bioavailability, hence posing a potential threat to the ecological security of estuaries and wetlands.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:River pollution Controlled terms:Aliphatic compounds - Biochemistry - Energy dispersive spectroscopy - Estuaries - Factor analysis - Heavy metals - Lake pollution - Lakes - Microplastic - Organic carbon - Particle size - Particle size analysis - Polyethylenes - Scanning electron microscopy - Sediments Uncontrolled terms:Electrical conductivity - Energy dispersive X ray spectroscopy - Environmental factors - Environmental pollutants - Heavy metal concentration - Low density polyethylene(LDPE) - Morphological characteristic - Sediment particle size Classification code:407.2 Waterways - 453 Water Pollution - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 801.2 Biochemistry - 804.1 Organic Compounds - 815.1.1 Organic Polymers - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Percentage 3.77e+01%, Percentage 4.82e+01%, Percentage 4.96e+01%, Percentage 7.00e-01% DOI:10.13227/j.hjkx.201907169 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278153 Title:Particle Size Distribution of PM Emission from In-use Gasoline and Diesel Vehicles Title of translation:在用汽油和柴油车排放颗粒物的粒径分布特征实测 Authors:Wang, Rui-Ning (1); Hu, Qing-Yao (2); Ren, Hong-Juan (1); Ma, Dong (3); Xu, Chong (1); Zhao, Xi-Qian (4); Wang, Meng-Hao (1); Xu, Wei-Biao (1); An, Jing-Yu (2); Huang, Cheng (2) Author affiliation:(1) School of Mechanical and Automobile Engineering, Shanghai University of Engineering Science, Shanghai; 201620, China; (2) State Environment Protection Key Laboratory of Formation and Prevention of the Urban Air Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) State Environment Protection Key Laboratory of Vehicle Pollution Control and Simulation, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (4) School of Mechanical and Automobile Engineering, Jiangsu University, Zhenjiang; 212013, China Corresponding author:Huang, Cheng(huangc@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1151-1157 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Particle size distribution and emission factors from 9 State 3-5 light-duty gasoline vehicles (LDGVs) and 15 State 3-5 heavy-duty diesel vehicles (HDDVs) were tested in this study using a constant volume sampling (CVS) system on a dynamometer. The influences of driving cycles and emission control level on the PM emission factors and particle size distribution were analyzed. The results show that the PM emission factors of the tested LDGVs and HDDVs were (4.1±4.0)×10¹⁴ and (5.7±4.3)×10¹⁵ kg^-1, respectively; the HDDV PM emission factor was (14±7) times less than that of LDGVs. Regarding LDGVs, the PM emission factor under the extra high speed condition was much more than that of the other speed conditions at (5.1±5.0)×10¹³ km^-1, 11.7, 14.1, and 7.3 times more than that under the low, medium, and high speed conditions, respectively. Regarding HDDVs, the emission factor under the high speed condition was 2.5 and 1.4 times that under the low and medium speed conditions, respectively, and was mostly of nuclei-mode particles. At the emission control level of State 3-5, the PM emission factors of LDGVs were (2.7±1.7)×10¹³, (2.6±1.3)×10¹³, and (1.6±1.2)×10¹³ km^-1, respectively, and those of HDDVs were (2.2±1.2)×10¹⁵, 2.0×10¹⁵, and (7.1±2.1)×10¹⁴ km^-1, respectively. With improvement in emission control level, the particle number emission control of LDGVs and HDDVs generally showed a good downward trend. However, the emission of PM above 110 nm from LDGVs did not improve with the emission control level. Although the quantity emission factor of HDDVs with particle size above 110 nm is relatively low, its harm to the environment cannot be ignored, which should justify necessary attention.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Particle size Controlled terms:Diesel engines - Diesel locomotives - Dynamometers - Emission control - Gasoline - Light transmission - Particle size analysis - Particulate emissions - Size distribution - Speed - Vehicles Uncontrolled terms:Constant volume sampling - Emission factors - Heavy duty diesel vehicles - High-speed conditions - Light duty gasoline vehicles - Particle number emission - Pm pollutions - Vehicle emission Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 523 Liquid Fuels - 612.2 Diesel Engines - 682.1.2 Locomotives - 741.1 Light/Optics - 922.2 Mathematical Statistics - 943.1 Mechanical Instruments - 951 Materials Science Numerical data indexing:Size 1.10e-07m DOI:10.13227/j.hjkx.201909114 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371324 Title:Predicting the Recycling Potential and Evaluating the Environmental Benefits of Waste Electrical and Electronic Equipment in Beijing-Tianjin-Hebei Title of translation:京津冀电子废弃物回收利用潜力预测及环境效益评估 Authors:Chen, Pan (1, 2); Shi, Xiao-Qing (1) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Shi, Xiao-Qing(shixq@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1976-1986 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Waste electrical and electronic equipment (WEEE or e-waste) is a significant urban mine in the Beijing-Tianjin-Hebei region. A comprehensive and systematic assessment of the amount of e-waste generated in the region and the resources and environmental benefits of e-waste recycling can provide scientific basis and methods to support collaborative and accurate management of e-waste in the region to solve resource and environmental problems. Based on the improved ownership coefficient method, material coefficient method, market value method, and pollution coefficient method, this study predicted and evaluated the recycling potential and environmental benefits of e-waste in Beijing-Tianjin-Hebei from 2010 to 2025 by estimating the production, amount of recyclable resources, resource recycling value, and environmental benefits of waste televisions, refrigerators, air conditioners, washing machines, and computers (five major e-wastes). The results show that the amount of five major e-wastes will increase continuously from 2010 to 2025, with an annual average growth rate of 7.75% during the period of 2010 to 2018, and it is expected to increase at 3.07% after that. In 2025, the amount of the five major e-wastes in Beijing-Tianjin-Hebei will reach 1 861.74×10⁴ units, with recycling of ordinary metal, plastic, and precious metal to 27.19×10⁴, 12.75×10⁴, and 19.45 tons, respectively. From 2019 to 2025, the economic value of recycling waste air conditioners and computers will be relatively higher than that of other e-wastes. The sum of the economic value of waste air conditioners and computers is 77.22% of the total annual recycling value. The economic value contribution ratios of copper and gold are 43.37% and 19.82%, respectively, which are significantly higher than that of other resources. It is estimated that the total value of resource recovery in 2025 will reach 5.02 billion yuan, which is 3.13 times that in 2010. Among them, the recovery values of common metals, precious metals, and plastics will be 2.87, 1.33, and 0.83 billion yuan, respectively. If all the five major e-wastes generated in 2025 are recycled in a standardized way, it will reduce the exploitation of primary ores by 913.23×10⁴ tons, the utilization of standard coal by 122.71×10⁴ tons, the emission of waste water, waste gas, waste residue, and heavy metals by 1 231.19×10⁴, 473.89×10⁴, 785.10×10⁴, and 6.08×10⁴ tons, respectively, and the emission of greenhouse gases by 32.92×10⁴ tons CO2-eq. Waste air conditioners have the greatest recycling potential, but the recycling capacity of waste air conditioners in processing enterprises needs to be improved urgently. To effectively exploit e-waste in Beijing-Tianjin- Hebei, the fund subsidy system should be improved as soon as possible, the supervision and management of informal dismantling departments should be strengthened, and a regional information sharing platform should be established to realize regional collaborative management of e-waste throughout its life cycle.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Electronic Waste Controlled terms:Air conditioning - Domestic appliances - Economic geology - Electronic equipment - Environmental management - Greenhouse gases - Heavy metals - Inclusions - Information management - Metal recovery - Plastic recycling - Precious metals - Solid wastes - Waste utilization Uncontrolled terms:Environmental benefits - Recycling potential - Tianjin - Waste electrical and electronic equipment - WEEE management Classification code:451.1 Air Pollution Sources - 454.1 Environmental Engineering, General - 481.1 Geology - 531 Metallurgy and Metallography - 547.1 Precious Metals - 643.3 Air Conditioning - 951 Materials Science Numerical data indexing:Mass 1.76e+04kg, Percentage 1.98e+01%, Percentage 3.07e+00%, Percentage 4.34e+01%, Percentage 7.72e+01%, Percentage 7.75e+00% DOI:10.13227/j.hjkx.201909249 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658146 Title:Spatial Patterns and Spatial Autocorrelations of Wetland Changes in China During 2003-2013 Title of translation:2003~2013年中国湿地变化的空间格局与关联性 Authors:Zhou, Ting (1); Ma, Jiao-Jiao (1); Xu, Song-Jun (1) Author affiliation:(1) School of Geography, South China Normal University, Guangzhou; 510000, China Corresponding author:Xu, Song-Jun(xusj@scnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2496-2504 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Wetlands play an important role in maintaining ecosystem functions. Wetlands in China have suffered intensive human disturbance, especially before 2000, resulting in great losses and degradation. Therefore, two national wetland resource surveys were carried out by the Chinese government during 1998-2003 and 2008-2013 to determine the status of wetlands, understand their dynamics, and provide substantial data that can aid scientific wetland conservation. Based on the survey data, the spatial pattern and spatial autocorrelation were explored using the standard deviation ellipse as well as global and local spatial autocorrelation statistics. GIS mapping was employed to display the results via the visualization of the spatial patterns and relationships. Results indicate that: ① Changes in the wetlands of China are significant and exhibit obvious regional differences. The center of the ellipse of the total wetlands has moved to the west, and the degree of spatial differentiation between natural wetlands and artificial wetlands is increasing. There is no significant spatial autocorrelation for changes in artificial wetlands. ② The changes in natural wetlands are significantly spatially autocorrelated and clustered, which are identified by global Moran's I and local Moran's I. The hotspots of natural wetland change are concentrated primarily in Qinghai, Tibet, and Sichuan. The individual hotspot is in Inner Mongolia and the cold spot is in Henan. The difference in spatial autocorrelation between natural and artificial wetland changes indicates that natural wetland changes have shown spatial continuity, while artificial wetland changes have shown strong spatial randomness. ③ Some useful spatial associations are used to delineate wetland conservation effects. Then, three major or five minor effective protection management regions are identified. Wetland conservation efforts should be continuously strengthened and improved, especially in the middle-lower Yangtze River region of central China. The use of Moran statistics helps to reveal spatial autocorrelation and identify the conservation effects in wetland changes, which can provide a basis for decision-making in regional wetland conservation and management systems.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Wetlands Controlled terms:Autocorrelation - Decision making - Surveys Uncontrolled terms:Conservation effects - Ecosystem functions - Lower yangtze rivers - Regional differences - Spatial associations - Spatial autocorrelations - Spatial differentiation - Wetland conservation Classification code:912.2 Management - 921 Mathematics DOI:10.13227/j.hjkx.202001005 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658178 Title:Nitrogen Removal in Low-C/N Rural Sewage Treatment by Anoxic/Oxic Biofilter Packed with New Types of Fillers Title of translation:新型填料A/O生物滤池处理低碳氮比农村污水脱氮 Authors:Zhao, Yuan-Zhe (1, 2, 3); Yang, Yong-Zhe (1); Wang, Hai-Yan (2, 3); Chu, Zhao-Sheng (2, 3); Chang, Yang (2, 3); Dong, Wei-Yang (2, 3); Yan, Guo-Kai (2, 3); Wang, Huan (1, 2, 3); Li, Cong-Yu (2, 3) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Research Center for Environmental Pollution Control Engineering Technology, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Wang, Hai-Yan(wanghy@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2329-2338 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:When low-concentration rural sewage is treated biologically, the effluent total nitrogen (TN) concentration often does not meet the discharge limit because of its low carbon-to-nitrogen ratio (C/N). To solve this problem, a laboratory-scale anoxic/oxic (A/O) biofilter packed with Arundo donax and activated carbon as the anoxic and aerobic column fillers (No. 2) was operated for treatment of simulated rural sewage and advanced nitrogen removal, while an ordinary gravel-packing A/O biofilter (No. 1) was set up as the control group. The results were as follows. When the influent chemical oxygen demand (COD), ammonia nitrogen (NH4⁺-N), and TN concentrations were (79.47±14.21), (34.49±2.08), and (34.73±3.87) mg•L^-1, respectively, the No. 1 and No. 2 reactors achieved removal efficiencies of (88.00±7.00)% and (89.00±10.00)%, (90.00±2.00)% and (97.00±7.00)%, and (37±15)% and (68±7)%, respectively. The results revealed that using Arundo donax and activated carbon new fillers could significantly enhance NH4⁺-N and TN removal. High-throughput sequencing results indicated that the microorganisms involved in the nitrification process in the No. 1 reactor mainly belong to Proteobacteria, whereas those in the No. 2 reactor belong to Proteobacteria and Nitrospirae. In addition, the main denitrification bacterial phyla in the anoxic column of the No. 1 reactor were Chloroflexi, Proteobacteria, Bacteroidetes, and Planctomycetes, whereas those in the anoxic column of the No. 2 reactor were primarily Bacteroidetes, Proteobacteria, Firmicutes, and Patescibacteria. Quantitative real time polymerase chain reaction (qPCR) results showed that the microbial nitrification (amoA and Nitrospira 16S rDNA), denitrification (narG, nosZ, nirS, and nirK), and anaerobic ammonium oxidation functional genes (ANAMMOX) in the No. 2 reactor were significantly higher than those in the No. 1 reactor. All the genes, except for the narG and nosZ genes, had one to two orders of magnitude of improvement in the No. 2 reactor compared to those in the No. 1 reactor.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Nitrogen removal Controlled terms:Activated carbon - Air pollution control - Ammonia - Anoxic water - Biofilters - Chemical oxygen demand - Denitrification - Effluents - Fillers - Genes - Nitrification - Polymerase chain reaction - Sewage treatment - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - High-throughput sequencing - Low carbon to nitrogens - Low concentrations - Nitrification process - Orders of magnitude - Quantitative real-time polymerase chain reaction - Removal efficiencies Classification code:451.2 Air Pollution Control - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 801.2 Biochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201910118 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658082 Title:Pollution Characteristics of Cooking Fumes, Particulates, and Non-methane Hydrocarbons in the Exhaust of Typical Beijing Restaurants Title of translation:北京市典型餐饮企业大气污染物排放特征 Authors:He, Wan-Qing (1); Wang, Tian-Yi (1); Shao, Xia (1); Nie, Lei (1); Shi, Ai-Jun (1) Author affiliation:(1) National Urban Environmental Pollution Control Engineering Research Center, 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:Shi, Ai-Jun(shiaijun@cee.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2050-2056 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the atmospheric pollution emission concentration and overall emission level of the Beijing catering industry, and thus provide a basis for the targeted formulation of pollution control measures for the catering industry, this study selected typical catering enterprises in Beijing to research. Combined with the use of stoves during the on-site measurement and testing period, the emission concentrations of cooking fumes, particulates, and non-methane hydrocarbons (NMHC), and the relationship between them in different types of catering enterprises, were analyzed, and the emission of atmospheric pollutants in the Beijing catering industry was estimated. The results showed that the average concentrations of cooking fumes, particulates, and NMHC of typical catering enterprises were (2.91±5.52), (9.25±10.02), and (12.72±11.38) mg•m^-3, respectively. These all exceed the Beijing local emission standards. Of the typical catering enterprises, roast duck and barbecue had higher particulate matter and NMHC emissions, which easily exceeded the emission standard. Roast duck and barbecue are therefore the governance focus of the catering industry. The ratio of particulates to cooking fumes in roast duck, barbecue, and cooking catering enterprises ranged from 6.21 to 43.08, 5.03 to 19.07, and 0.75 to 7.55, respectively. The emission concentrations of particles are much larger than those of cooking fumes from charcoal grill and fruit-roasted duck. Pearson correlation coefficient analysis showed that the concentrations of particulates and cooking fumes in catering enterprises were strongly correlated, and the concentrations of particulates and NMHC were weakly correlated. The study estimates roughly that the emissions of cooking fumes, particulates, and NMHC were 2 492, 6 127, and 9 436 tons, respectively, from the catering industry in Beijing in 2014.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Particulate emissions Controlled terms:Calcination - Charcoal - Correlation methods - Hydrocarbons - Methane - Particles (particulate matter) - Pollution control Uncontrolled terms:Atmospheric pollutants - Atmospheric pollution - Average concentration - Catering industries - Emission concentration - Non-methane hydrocarbons - On-site measurement - Pearson correlation coefficients Classification code:451.1 Air Pollution Sources - 524 Solid Fuels - 802.3 Chemical Operations - 804.1 Organic Compounds - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Mass 8.56e+06kg DOI:10.13227/j.hjkx.201908063 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658145 Title:N2O Emissions from Tea Plantations with Sorghum Intercropping and Application of Big Urea Pills Title of translation:间种高粱及施用大颗粒尿素对茶园N2O排放的影响 Authors:Zhang, Ke-Bin (1, 2, 3); Liu, Xin-Liang (1, 2); Kang, Man (4); Wang, Yi (1, 2); Shen, Jian-Lin (1, 2); Li, Yong (1, 2) Author affiliation:(1) Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) College of Resources and Environmental Science, Hunan Agricultural University, Changsha; 410128, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2434-2444 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A large amount of fertilizers are applied to the tea plantations resulting in high nitrous oxide (N2O) emissions. The area of Chinese tea plantations has been expanding in recent years, making them an important source of agricultural N2O emissions. There is an urgent need for effective mitigation measures for N2O emissions from tea plantations. In this study, the N2O emission flux and related environmental factors are measured in Chinese mid-subtropical typical hilly tea plantation under three kinds of management measures, namely intercropping sorghum, applying big urea pills, and under conventional fertilization conditions. The aim of this experiment is to determine the main factors controlling N2O emissions from the soils of the tea plantation and confirm the true effectiveness of the proposed N2O emission mitigation measures. The results of a 2-year field experiment show that: ① N2O emissions were significantly correlated with soil chemical properties, temperature and rainfall, interaction between soil physical and chemical properties; soil chemical properties have the greatest impact on soil N2O emissions. The concentration of soil NO3^--N is the most important factor determining the size of N2O flux in the tea plantation. The most important task of N2O emission mitigation research in the tea plantation is to reduce the concentration of soil NO3^--N; ②sorghum intercropping reduces N2O emissions by 51.2% while not affecting the tea yield. From the perspective of mitigating global warming, sorghum intercropping is the best tea plantation management measure per the results of this study; ③ applying big urea pills effectively increases tea yield while simultaneously reducing the N2O emissions by 34.7%. From the perspective of balancing economic benefits as well as mitigating global warming, application of big urea pills is undoubtedly the best tea plantation management measure as indicated by this study.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Soil pollution Controlled terms:Agricultural robots - Chemical properties - Forestry - Global warming - Metabolism - Nitrogen oxides - Pelletizing - Soils - Tea - Urea Uncontrolled terms:Economic benefits - Emission mitigation - Environmental factors - Field experiment - Management measures - Mitigation measures - Soil chemical property - Soil physical and chemical properties Classification code:443.1 Atmospheric Properties - 483.1 Soils and Soil Mechanics - 801 Chemistry - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Age 2.00e+00yr, Percentage 3.47e+01%, Percentage 5.12e+01% DOI:10.13227/j.hjkx.201911090 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105027 Title:Phylogenetic Processes and Key Driving Factors of Bacterial Communities in Jinze Reservoir Title of translation:金泽水库库区细菌群落构建过程与关键驱动因子分析 Authors:Liu, Ming-Kun (1); Tong, Jun (2); Zhu, Hui-Feng (2); Bai, Xiao-Hui (1) Author affiliation:(1) State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Shanghai Municipal Water Supply Control & Monitoring Center, Shanghai; 200080, China Corresponding author:Bai, Xiao-Hui(xhbai@sjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4062-4068 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the ecological mechanisms of the bacterial response to human disturbance in micro-polluted water ecosystems, we studied the relationship between the environmental factors and bacterial community development in the incoming water and various areas of a reservoir based on an ecological null model. The results showed that the phylogenetic clustering of bacterial communities was more dispersed than expected (the single-sample t-test of SES.MNTD has a 95% lower confidence limit of 9.79). Temperature is an important environmental factor affecting community phylogeny. The relative importance of stochastic and deterministic processes in the bacterial community succession of different samples showed seasonal characteristics. The bacterial community succession in spring, summer, and autumn samples was dominated by random and deterministic processes. NH4⁺-N is the main environmental factor affecting the relative importance of random and deterministic processes. When the concentration of NH4⁺-N is 0.06-0.40 mg•L^-1, the bacterial community succession is dominated by random processes; when the concentration is 0.40-0.80 mg•L^-1, it is dominated by both random and deterministic processes. Dispersal limitation (61.68%) and heterogeneous selection (26.65%) played important roles in bacterial community changes at different sampling points in the study area.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Ecosystems Controlled terms:Bacteria - Hydrogeology - Importance sampling - Random processes - Reservoirs (water) - Stochastic systems - Water pollution Uncontrolled terms:Bacterial community - Deterministic process - Ecological mechanisms - Environmental factors - Human disturbances - Lower confidence limit - Micro - polluted waters - Seasonal characteristics Classification code:441.2 Reservoirs - 453 Water Pollution - 454.3 Ecology and Ecosystems - 481.1 Geology - 922 Statistical Methods - 922.1 Probability Theory - 961 Systems Science Numerical data indexing:Mass_Density 4.00e-04kg/m3 to 8.00e-04kg/m3, Mass_Density 6.00e-05kg/m3 to 4.00e-04kg/m3, Percentage 2.66e+01%, Percentage 6.17e+01%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202002207 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256328 Title:Characteristics of Volatile Organic Compounds in Wood Coatings and Automotive Coatings in China Title of translation:我国木器涂料及汽车涂料中挥发性有机物特征 Authors:Ke, Yun-Ting (1); Sun, Yu-Hang (1); Cheng, Hai-Rong (1); Liu, Rui-Yuan (1); Huang, Hao-Min (1, 2, 3, 4); Fan, Li-Ya (1, 2, 3, 4); Ye, Dai-Qi (1, 2, 3, 4) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) National Engineering Laboratory for VOCs Pollution Control Technology and Equipment (SCUT), Guangzhou; 510006, China; (3) Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou; 510006, China; (4) Guangdong Provincial Engineering and Technology Research Centre for Environmental Risk Prevention and Emergency Disposal (SCUT), Guangzhou; 510006, China Corresponding author:Ye, Dai-Qi(cedqye@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4446-4454 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Presently, there are a few studies on the measurement of industrial organic solvents in China. To determine the content and species of volatile organic compounds (VOCs) in industrial organic solvents and to provide the emission factors of organic solvents, the Chinese wood and automotive coatings, which accounted for the largest proportion of production in the world, were investigated. Coating samples were obtained by sampling from companies and buying from markets, and were measured in accordance with the domestic standard testing methods for coatings. The content and composition spectrum of VOCs in the coatings were determined, and the ozone formation potential (OFP) was then calculated. The results showed that for wood coatings, the average content of the VOCs in solvent-based, water-based, and ultra-violet (UV) coatings were 37.28%, 9.88%, and 18.02%, respectively. For automotive coatings, the average content of the VOCs in water-based original equipment manufacturer (OEM) coating, solvent-based OEM coating, water-based refinishing coating, and solvent-based refinishing coating were 15.06%, 59.90%, 11.79%, and 54.50%, respectively. The content of the VOCs in different types of coatings varied substantially. The main components and OFP contributors were alcohols and ethers for water-based coatings, benzene series and esters for solvent-based coatings, and esters, alcohols, and ethers for UV coatings. The average value of the coating samples could meet the current mandatory national standards, but 12% of the solvent-based wood coating samples and 42% of the solvent-based OEM coating samples did not meet the standards. In addition, except for the benzene series of the water-based wood coatings, the contents of harmful substances in other coating samples were up to the standards.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Coatings Controlled terms:Benzene - Esters - Ethers - Industrial emissions - Organic solvents - Testing - Volatile organic compounds - Wood Uncontrolled terms:Automotive coatings - Domestic standards - Harmful substances - National standard - Original equipment manufacturers - Ozone formation potentials - Solvent-based coatings - Water-based coating Classification code:451.1 Air Pollution Sources - 804.1 Organic Compounds - 811.2 Wood and Wood Products - 813.2 Coating Materials Numerical data indexing:Percentage 1.18e+01%, Percentage 1.20e+01%, Percentage 1.51e+01%, Percentage 1.80e+01%, Percentage 3.73e+01%, Percentage 4.20e+01%, Percentage 5.45e+01%, Percentage 5.99e+01%, Percentage 9.88e+00% DOI:10.13227/j.hjkx.202002103 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008901 Title:Characteristics of Secondary Organic Particles and the Potential Formation of SOA from VOCs During Wintertime Heavy Pollution Episodes in Tianjin Title of translation:天津市冬季重污染二次有机化学污染特征及VOCs对SOA生成潜势 Authors:Xu, Hong (1); Tang, Miao (1); Xiao, Zhi-Mei (1); Gao, Jing-Yun (1); Yang, Ning (1); Li, Li-Wei (1); Zheng, Nai-Yuan (1); Chen, Kui (1); Deng, Xiao-Wen (1) Author affiliation:(1) Tianjin Eco-Environmental Monitoring Center, Tianjin; 300191, China Corresponding author:Tang, Miao(tangmiao32@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3492-3499 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The characteristics of secondary organic reactions were studied based on supersite monitoring data from January to March, 2019, in Tianjin. During heavy pollution episodes, SOC (secondary organic carbon) accounted for between 3.1% and 3.8% of PM2.5, and the growth rate of SOC was obviously higher than that of PM2.5, thus indicating that secondary organic reactions had a considerable effect on PM2.5. The growth rate of VOCs (volatile organic compounds) was lower than that of PM2.5, which was probably due to the fact that VOCs were consumed as precursors to secondary particles. The ratio of ethane to acetylene was higher than 2. 0 during heavy pollution episodes indicating that air masses were old, and the ratio was lower than clean air days showing that the reaction activities were higher than before. During the heavy pollution episodes, the potential formation of SOA (secondary organic aerosol) from VOCs ranged from 0.49 to 1.21 μg•m^-3. Among the species, aromatic hydrocarbons contributed the most, whereby the highest contribution exceeded 90%, and their growth rates were also the highest; hence, aromatic hydrocarbons were the VOCs species that had the greatest effect on SOA.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Growth rate Controlled terms:Aromatic hydrocarbons - Mineral oils - Organic carbon - Pollution - Volatile organic compounds Uncontrolled terms:Clean air - Organic particles - Organic reaction - Pollution episodes - Reaction activity - Secondary organic aerosols - Secondary organic carbon - Secondary particles Classification code:513.3 Petroleum Products - 804.1 Organic Compounds Numerical data indexing:Percentage 3.10e+00% to 3.80e+00%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202001116 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104980 Title:Distribution Characteristics of Per-/polyflouralkyl Substances in River Sediments Around Typical Fluorine Industrial Parks Title of translation:典型氟工业园周边河流沉积物中全(多)氟化合物的分布特征 Authors:Sun, Lin-Ting (1, 2); Zhao, Zhen (3); Tang, Jian-Hui (1, 4) Author affiliation:(1) Shandong Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai; 264003, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai; 201306, China; (4) Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao; 266071, China Corresponding author:Tang, Jian-Hui(jhtang@yic.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4069-4075 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are a group of manmade chemicals and are ubiquitously detected in aquatic environments. China is a major producer and consumer of PFASs. In this study, we investigated the occurrence and characteristics of PFASs in the surface sediments from three fluorine industrial parks in North China, the Xihe River in Liaoning Province (Fuxin Section), the Xiaoqing River in Shandong Province (Zibo Section), and the Yangtze River in Jiangsu Province (Changshu Section), using the UPLC/MS-MS method. The total concentration of PFASs (∑PFASs) in surface sediments of the Xihe River ranged from 15.8 to 2 770 ng•g^-1, and PFTeDA and HFPO-DA were the dominant pollutants. In the surface sediments of the Xiaoqing River, ∑PFASs ranged from 12.2 to 7 853 ng•g^-1, and PFOA and HFPO-DA were the dominant pollutants. In the surface sediments of the Yangtze river, ∑PFASs ranged from 9.20 to 35.9 ng•g^-1, and PFTeDA and 6:2 FTS were the main pollutants. Sewage discharge from the industrial parks (point source pollution) was the main source of PFASs in three regions in this study. The PFAS content and composition in three regions varied significantly depending on the production capacity and industry type. There was no significant correlation between the content of PFASs and its components and the particle size and TOC of the sediments. The correlations between the components of PFASs indicated that the enrichment process of PFASs in sediments was impacted by various factors.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:River pollution Controlled terms:Fluorine - Particle size - Rivers - Sewage - Surficial sediments Uncontrolled terms:Aquatic environments - Distribution characteristics - Point source pollution - Polyfluoroalkyl substances - Production capacity - Sewage discharges - Shandong province - Surface sediments Classification code:452.1 Sewage - 453 Water Pollution - 483 Soil Mechanics and Foundations - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202001034 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256331 Title:Influence of Typical Desulfurization Process on Flue Gas Particulate Matter of Coal-fired Boilers Title of translation:典型脱硫工艺对燃煤锅炉烟气颗粒物的影响 Authors:Zhang, Jin-Sheng (1); Wu, Jian-Hui (1); Lü, Rui-He (1); Song, Dan-Lin (2); Huang, Feng-Xia (2); 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; 300071, China; (2) Chengdu Research Academy of Environmental Sciences, Chengdu; 610072, China Corresponding author:Wu, Jian-Hui(envwujh@nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4455-4461 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As flue gas desulfurization (FGD) was one of the most important purification processes of coal-fired boilers, we selected four boilers, which were equipped with wet limestone, furnace calcium injection, ammonia-based, and double-alkali FGDs, to research the influence of FGDs on the flue particulate matter (PM). The flue PM before and after the FGD were sampled using laboratory resuspension and dilution tunnel sampling methods, respectively, and the PM was analyzed for its chemical composition (i.e., ions, elements, and carbon). The results showed that the types of desulfurizers could influence the composition of the flue PM. After passing through the wet limestone, ammonia-based, and double-alkali FGDs, the proportion of Ca, NH4⁺, and Na in PM2.5 increased from 5.1% to 24.8%, from 0.8% to 7.3%, and from 0.9% to 1.7%, respectively. The influence of wet and dry FGDs on the flue PM were different. The fraction of ions in the PM emitted from the wet FGD were higher than those from the dry FGD. The proportion of SO4^2- in the flue PM2.5 increased from 2.0% and 6.7% to 9.6% and 11.9% using the wet limestone and ammonia-based FGDs, respectively, and Cl^- increased from 0.4% and 1.2% to 3.8% and 5.2%. In addition, the amount of heavy metals (e.g., Cr, Pb, Cu, Ti, and Mn) in PM2.5 declined after the wet FGDs. The PM2.5 emitted from the dry FGD boiler was richer in crustal elements, such as Al, Si, and Fe, than that from the wet FGDs. The wet FGDs also effected the carbonaceous components of the flue PM. After passing through the wet limestone and ammonia-based FGDs, the proportion of elemental carbon in the flue PM2.5 decreased from 6.1% to 0.9% and from 3.6% to 0.7% respectively, but the organic carbon content did not decrease.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Coal fired boilers Controlled terms:Air purification - Ammonia - Chemical analysis - Desulfurization - Flue gases - Flues - Fossil fuel power plants - Gas fired boilers - Heavy metals - Lime - Limestone - Organic carbon - Particles (particulate matter) Uncontrolled terms:Carbonaceous components - Chemical compositions - Crustal elements - De-sulfurization process - Flue gas desulfurization(FGD) - Organic carbon contents - Particulate Matter - Purification process Classification code:451.1 Air Pollution Sources - 522 Gas Fuels - 524 Solid Fuels - 531 Metallurgy and Metallography - 643 Space Heating, Ventilation and Air Conditioning - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 1.19e+01%, Percentage 1.20e+00% to 3.80e+00%, Percentage 2.00e+00%, Percentage 3.60e+00% to 7.00e-01%, Percentage 4.00e-01%, Percentage 5.10e+00% to 2.48e+01%, Percentage 5.20e+00%, Percentage 6.10e+00% to 9.00e-01%, Percentage 6.70e+00% to 9.60e+00%, Percentage 8.00e-01% to 7.30e+00%, Percentage 9.00e-01% to 1.70e+00% DOI:10.13227/j.hjkx.202003193 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105141 Title:Effect of Temperature on Performance and Microbial Community Structure of Anaerobic Biofilter-Treated Domestic Wastewater Title of translation:温度对城市污水厌氧生物滤池运行效果与菌群结构的影响 Authors:Liu, Zhi-Bin (1); Liu, Xiu-Hong (1); Zhou, Tong (2); Zhang, Shi-Yong (1); Li, Jian-Min (1); Yang, Qing (1) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100122, China; (2) Research and Development Center of Beijing Drainage Group Technology, Beijing; 100122, China Corresponding author:Liu, Xiu-Hong(lxhfei@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4141-4149 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Municipal wastewater methanogenesis is one of the ways to utilize municipal wastewater resources.In this study, a biofilter used to treat actual municipal wastewater was employed to investigate the methanogenesis in a pilot-scale reactor. The method of rapid start-up, the influence of temperature on the reactor performance, and the changes in the microbial structure were investigated in the pilot-scale study. The rapid start-up of the biofilter reactor was achieved by the combination of intermittent and continuous operations. The effluent concentration of SCOD was 60 mg•L^-1at the stable operation stage. The biofilter was operated steadily at a temperature higher than 14℃, the accumulation of volatile fatty acids (VFA) was low, and the effluent concentrations of SCOD and TCOD were 69 mg•L^-1and 90 mg•L^-1, respectively. In addition, the metabolism of hydrolysis and methanogenesis tended to balance off under such conditions. However, the abundance of microorganisms that can hydrolyze organic matter and produce methane decreased. The abundance of Peptostreptococcaceae increased even the temperature was lower than 10℃, which typically increases VFA production. Therefore, the concentrations of effluent VFA and TCOD increased, but methane production decreased. The effluent concentration of SCOD was relatively stable. The microbial abundance and diversity were the richest at 19℃ in the reactor. The acetolactic methanogens were the dominant methanogens at low temperatures. The anaerobic biological filter for the treatment of urban sewage starts quickly and can resist the impact of continuous temperature reduction. Moreover, it does not need backwashing after running for nine months, and it is not easily clogged.Therefore,the functions of biological contact oxidation and filtration retention of the biological filter can be more fully utilized.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Effluents Controlled terms:Biofilters - Biological sewage treatment - Filtration - Hydrolysis - Methane - Methanogens - Passive filters - Sewage - Volatile fatty acids - Wastewater treatment Uncontrolled terms:Anaerobic biofilters - Biological contact oxidation - Continuous temperature - Effect of temperature - Effluent concentrations - Microbial abundances - Microbial community structures - Municipal wastewaters Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.9 Biology - 703.2 Electric Filters - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Mass_Density 9.00e-02kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202001014 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371191 Title:Effect and Approach of Enteromorpha prolifera Biochar to Improve Coastal Saline Soil Title of translation:浒苔生物炭对滨海盐碱土壤改良的效果及途径 Authors:Wu, Dan (1); Sun, Ping (1); Lu, Peng-Zhan (1); Chen, You-Yuan (1, 2); Guo, Jia-Meng (1); Liu, Ming (1); Wang, Lei (3); Zhang, Cai-Jie (4) 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) Qingdao Municipal Engineering Design and Research Institute Co., Ltd., Qingdao; 266061, China; (4) Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao; 266100, China Corresponding author:Chen, You-Yuan(youyuan@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1941-1949 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The use of biochar to improve adversity of soil has received increasing attention. Enteromorpha prolifera biochar is used to repair coastal saline-alkali soil, which can not only utilize Enteromorpha prolifera but can also increase the scale of the coastal land reserve. In this study, the method of soil culture experiments was used to explore the effect and pathway of 0%-3% addition of Enteromorpha prolifera on the improvement of saline-alkali soil. The results showed that the optimum preparation temperature of Enteromorpha prolifera biochar suitable for saline-alkali soil improvement was 400℃, and the optimum addition amount was 1.5%. At the optimum level, although the biochar had a negative effect, such as increasing soil salinity (0.12%) and pH (1.49%), it also produced positive effects, such as reducing soil Na⁺/K⁺ by 55.73%, increasing mineral content, and improving water conductivity. Enteromorpha prolifera biochar improved soil physicochemical and biological properties, increased nutrient content, enhanced microbial activity, improved soil nutrient availability, and produced positive effects. These positive effects were characterized by reducing soil bulk density by 11.35%, increasing organic matter by 42.64%, increasing the proportion of organic carbon in total carbon by 3.84 times, increasing the proportion of available phosphorus in total phosphorus by 4.15 times, and increasing soil invertase activity by 2.39 times, urease activity by 1.18 times, and catalase activity 1.50 times. Therefore, the positive effect of Enteromorpha prolifera biochar on saline-alkali soil is more than negative, and it can be used for the improvement of coastal saline-alkali soil. This study provides a new path for the resource utilization of Enteromorpha prolifera and the improvement of the ecological environment of coastal saline-alkali soil.
© 2020, Science Press. All right reserved. Number of references:58 Main heading:Soils Controlled terms:Nutrients - Organic carbon - Phosphorus - Physicochemical properties Uncontrolled terms:Bio chars - Negative effect - Positive effect - Saline-alkali soils - Soil enzymes - Soil nutrients Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 0.00e+00% to 3.00e+00%, Percentage 1.13e+01%, Percentage 1.20e-01%, Percentage 1.49e+00%, Percentage 1.50e+00%, Percentage 4.26e+01%, Percentage 5.57e+01% DOI:10.13227/j.hjkx.201909044 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256367 Title:Assessment and Source Analysis of Heavy Metal Pollution in Farmland Soils in Southern Youyang County, Chongqing Title of translation:重庆市酉阳县南部农田土壤重金属污染评估及来源解析 Authors:Wang, Rui (1, 2); Deng, Hai (1, 2); Yan, Ming-Shu (1, 2); He, Zhong-Xiang (1, 2); Zhou, Jiao (1, 2); Liang, Shao-Biao (1, 2); Zeng, Qin-Qin (3) Author affiliation:(1) Southeast Sichuan Geological Group, Chongqing Bureau of Geology and Minerals Exploration, Chongqing; 400038, China; (2) Chongqing Key Laboratory of Land Quality Geological Survey, Chongqing; 400038, China; (3) Chengdu Geological Survey Center of China Geological Survey, Chengdu; 610081, China Corresponding author:Deng, Hai(14408887@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4749-4756 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the impact of mining activities and geological background on the soil environment, 156 soil samples were collected from an agricultural land in southern Youyang County, Chongqing. The content and pH of heavy metals in the soil were analyzed, and the Nemerow index method was used to evaluate the pollution status of soil heavy metals. The source of soil heavy metals was discussed using the principal component analysis/absolute principal component score (PCA/APCS) receptor model. The results showed that the soil Cd pollution was distributed in a planar shape, while soil Hg mainly appeared as point pollution. The medium-severe soil pollution was mainly distributed at the junction of Tushi Town, Mawang Town, and Longtan Town, where the soil was predominantly acidic and there was a higher risk of crop contamination; the indicator Kriging evaluation results showed that there was a higher probability of soil contamination at the junction of the three towns and the northern part of Tushi Township. The results of the PCA/APCS receptor model analysis showed that the sources of soil As, Cd, Cr, and Ni were mainly controlled by geological background; soil Hg, Pb, and Zn were mainly controlled by mining activities; further, soil Cu was affected by both geological background and mining activities. In addition, the agricultural activities were also one of the sources of soil As, Cd, Pb, Cu, and Zn. The medium-heavy pollution of the soil in the study area was mainly caused by mining activities, while the heavy metal pollution of the soil caused by geological background was mainly light pollution. This study can provide a theoretical basis for the safe use of land and the prevention and control of soil pollution in typical regions.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Soil pollution Controlled terms:Agricultural robots - Agriculture - Geology - Heavy metals - Metal analysis - Soil pollution control - Soils Uncontrolled terms:Agricultural activities - Evaluation results - Geological background - Heavy metal pollution - Mining activities - Prevention and controls - Principal Components - Soil contamination Classification code:481.1 Geology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202003175 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517607 Title:DA-6 and GLDA Enhanced Pancium virgatum L. to Phytoextract Cd from Contaminated Soils Title of translation:胺鲜酯与螯合剂GLDA联合强化柳枝稷吸收积累镉效果 Authors:Wang, Zheng (1, 2); Sun, Zhao-Jun (1, 3); Mohamed, Sameh (4); Wang, Zhen (3); He, Jun (3); Han, Lei (3) 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 Corresponding author:Sun, Zhao-Jun(sunzhaojunyx@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5589-5599 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To reveal the effects of diethyl aminoethyl hexanoate (DA-6) combined with L-Glutamic acid, N,N-diacetic acid (GLDA) on the remediation of Cd contaminated soils by Panicum virgatum L., different GLDA application methods with total application doses of 600, 1 200, and 2 400 kg•hm^-2equally divided 1, 2, and 4 times, respectively, were studied on the basis of DA-6 concentrations of 0 and 10 μmol•L^-1, and application intervals (2 and 4 times) were 30 and 15 days, respectively, over 60 days. Soil pH, dissolved organic carbon (DOC), biomass and Cd contents, Cd extraction, total Cd, and available Cd (DTPA-Cd) were analyzed. The results showed that first, the combination of DA-6 and GLDA could improve soil pH and DOC, and the pH and DOC increased significantly with increased GLDA application. Secondly, the combination of DA-6 and GLDA could significantly improve the biomass and Cd contents of Panicum virgatum L., and for DA-6, the amounts and times of GLDA application were the most important factors affecting the biomass and Cd contents. Third, the highest amount of Cd extracted was 22.18g•hm^-2 at 1 200 kg•hm^-2 GLDA applied 4 times and 10μmol•L^-1 DA-6, which was 1.93 times higher than CK (wherein no DA-6 and GLDA were applied) and 1.23 times higher than 10D0 (in which only DA-6 was applied). Finally, the lowest soil total Cd was 0.529mg•kg^-1 at 2 400 kg•hm^-2 GLDA applied 2 times and 10 μmol•L^-1 DA-6, which was 21.04% lower than CK and 18.23% lower than 10D0. Therefore, the combination of DA-6 and GLDA can further strengthen the recovery of Cd contaminated farmlands via Panicum virgatum L..
© 2020, Science Press. All right reserved. Number of references:59 Main heading:Soil pollution Controlled terms:Amino acids - Biomass - Cadmium - Organic carbon - Remediation - Soils Uncontrolled terms:Application method - Cd-contaminated soils - Contaminated soils - Diethyl aminoethyl hexanoate - Dissolved organic carbon - L-glutamic acids - Panicum virgatum - Soil pH 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 - 804.1 Organic Compounds Numerical data indexing:Age 1.64e-01yr, Age 4.11e-02yr, Age 8.22e-02yr, Molar_Concentration 0.00e+00mol/m3, Molar_Concentration 1.00e-02mol/m3, Percentage 1.82e+01%, Percentage 2.10e+01% DOI:10.13227/j.hjkx.202004071 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105138 Title:Quantitative Assessment of Human Health Risks Based on Soil Heavy Metals and PAHs Sources:Take a Polluted Industrial Site of Beijing As an Example Title of translation:基于土壤重金属及PAHs来源的人体健康风险定量评价:以北京某工业污染场地为例 Authors:Wu, Zhi-Yuan (1, 2); Zhang, Li-Na (1); Xia, Tian-Xiang (1); Jia, Xiao-Yang (1); Li, Hui-Ying (1); Wang, Shi-Jie (1) Author affiliation:(1) Beijing Key Laboratory for Risk Modeling and Remediation of Contaminated Sites, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) School of Geosciences & Surveying Engineering, China University of Mining and Technology (Beijing), Beijing; 100083, China Corresponding author:Zhang, Li-Na(zhln2011@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4180-4196 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, 130 surface soil samples were collected at an industrial pollution site in Beijing and the contents of As, Be, Cd, Cu, Cr, Hg, Ni, Pb, Sb, Ti, Zn, and 16 PAHs were determined. The positive matrix factorization (PMF) model was used to analyze the sources of heavy metals and PAHs, and the contributions of these sources to carcinogenic risk and hazard index in the study area were calculated. The results showed that the contents of Cd, Cu, Pb, Hg, As, Zn, and Cr in the soil exceeded the background values in different degrees; Cd, Hg, Pb, Zn, and Cu exceeded the background values by>50%. Low molecular weight PAHs (two and three rings) and high molecular weight PAHs (four to six rings) accounted for 39.6% and 60.4% of the total content of 16 PAHs. The PAH content at 77% of the sampling points at the target site was more than 1 000 μg•kg^-1, which suggests severe PAH pollution at the site. Heavy metals Be, Ti, As, and Ni mainly originated from natural sources. There are three major sources of 7 heavy metals and 16 PAHs at the site: coal combustion (Hg and ∑16PAHs), smelting (Cu, Cr, Pb, and Zn), and traffic (Sb and Cd). The contribution rates of these sources to the total average contents of seven heavy metals and sixteen PAHs at 130 sampling sites were 8.46% (coal combustion), 90.61% (smelting), and 0.94% (traffic). Human health risk assessment results showed that the carcinogenic risk of seven heavy metals and ∑16PAHs ranged from 4.17×10^-6 to 39.38×10^-4, and the hazard index ranged from 0 to 32.23. The maximum carcinogenic risk and hazard index values were calculated near the coking plant. Benzo[α]pyrene was the PAH that posed the highest carcinogenic risk and Zn was the heavy metal that had the highest hazard index value. The average carcinogenic risk of coal combustion was 2.16×10^-4, accounting for 50.26% of the total average carcinogenic risk. The average hazard index of smelting was 0.834, accounting for 56.43% of the total average non-carcinogenic risk. These two pollution sources are responsible for the high levels of heavy metals and PAHs in the soil of the steel smelting sites that pose the most severe health risks. The results of this study can provide reference for soil remediation and process optimization at other heavily polluted industrial sites.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Coal combustion Controlled terms:Coal - Coking - Factorization - Hazards - Health - Health risks - Heavy metals - Lead smelting - Molecular weight - Optimization - Risk assessment - Soil conservation - Soil pollution - Soils - Zinc smelting Uncontrolled terms:High molecular weight - Human health risk assessment - Human health risks - Industrial pollution - Low molecular weight - Pollution sources - Positive matrix factorization models - Quantitative assessments Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 524 Solid Fuels - 531 Metallurgy and Metallography - 533.2 Metal Refining - 914.1 Accidents and Accident Prevention - 921 Mathematics - 921.5 Optimization Techniques - 931.3 Atomic and Molecular Physics Numerical data indexing:Percentage 3.96e+01%, Percentage 5.03e+01%, Percentage 5.64e+01%, Percentage 6.04e+01%, Percentage 7.70e+01%, Percentage 8.46e+00%, Percentage 9.06e+01%, Percentage 9.40e-01% DOI:10.13227/j.hjkx.201910152 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106098 Title:Simulation of Water Quality Response of Guishui River Wetland Plants and Water Diversion Title of translation:妫水河湿地植物作用及调水水质响应模拟 Authors:Li, Ya-Juan (1, 2); Du, Yan-Liang (1); Bi, Er-Ping (2); Wang, Liang (1); Chen, Cui-Bai (2) Author affiliation:(1) China Institute of Water Resources and Hydropower Research, Beijing; 100038, China; (2) School of Water Resources & Environment, China University of Geosciences, Beijing; 100083, China Corresponding author:Du, Yan-Liang(duyl@iwhr.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4095-4104 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A two-dimensional model MIKE21 coupled with a modified EcoLab module was applied to model the water quality of surface flow wetlands. In the model, vegetation effects, oxygen production, nutrient consumption by microorganisms and vegetation were set in the solutions of hydrodynamic, chemical, and biological processes. Based on the field investigation and measurements in the Guishui River wetland, the model was established for the downstream reaches of the Guishui River and the Sanli River. The model calculated the hydrodynamics and water quality changes by vegetation type and distribution. The model parameters were calibrated and results were validated using the measurements. The concentrations of ammonia nitrogen, phosphate, and total nitrogen at outflow decreased by 14.29%, 33.33%, and 20.00% in the presence of wetland vegetation compared to no wetland vegetation. During water circulation, the flow rate increased by 0.4 m³•s^-1 at the inlet of Guishui and Sanli rivers, increasing the water level and velocity in some parts of the rivers. The water areas with vegetation in Sanli and Guishui rivers increased by 144.44% and 13.16%, respectively. The concentrations of ammonia nitrogen, phosphate, and total nitrogen at outflow decreased by 35.71%, 50.00%, and 46.67% compared to no wetlands and no circulation. The circulation strengthened the wetland purification function. The wetland vegetation distribution was organically integrated into the model for water quality calculation, which provides the technical support for the water quality response research under comprehensive measures such as river and lake wetland ecological restoration and water conservancy regulation.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Wetlands Controlled terms:Ammonia - Flood control - Hydrodynamics - River diversion - Vegetation - Water levels - Water management - Water quality Uncontrolled terms:Biological process - Ecological restoration - Field investigation - Nutrient consumption - Surface-flow wetland - Two dimensional model - Vegetation effects - Water quality response Classification code:441 Dams and Reservoirs; Hydro Development - 442.1 Flood Control - 445.2 Water Analysis - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.32e+01%, Percentage 1.43e+01%, Percentage 1.44e+02%, Percentage 2.00e+01%, Percentage 3.33e+01%, Percentage 3.57e+01%, Percentage 4.67e+01%, Percentage 5.00e+01% DOI:10.13227/j.hjkx.202002052 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008954 Title:Emission Inventory of Intermediate Volatility Organic Compounds(IVOCs) from Biomass Burning in the Yangtze River Delta During 2010-2018 Title of translation:长江三角洲2010~2018年生物质燃烧中等挥发性有机物(IVOCs)排放清单 Authors:Zhu, Yong-Hui (1); Wang, Qian (1); Huang, Ling (1); Yin, Si-Jia (1); Li, Li (1); Wang, Yang-Jun (1) Author affiliation:(1) Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China Corresponding author:Huang, Ling(linghuang@shu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3511-3517 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Intermediate volatility organic compounds (IVOCs) are important precursors of secondary organic aerosols (SOA) but are currently not included in the conventional emissions inventories. Biomass burning represents an important source of IVOCs that could contribute to SOA formation. This study estimated the IVOC emissions from biomass burning in the Yangtze River Delta (YRD) region from 2010 to 2018 based on the fire inventory from NCAR (FINN) and the IVOCs/primary organic aerosol (POA) ratio reported in literature. During this period, the total number of fire events over the YRD region presented a declining trend, with an average of 10⁴ fire events detected per year. During 2016-2018, the average number of fire events was approximately 6 000 per year, which was 60% less than that prior to 2016. In terms of the monthly variation, the period from May to August was the period with the most fires observed, which was followed by a small peak in October. The results calculated based on the IVOCs/POA ratio method showed that the IVOC emissions from biomass burning exhibited large differences with different combinations of POA/OC and IVOCs/POA ratios, ranging from a maximum of 305. 7×10⁴ t to as small as 10.5×10⁴ t. Monte Carlo simulation revealed that the uncertainties associated with the IVOCs/POA ratio method range from -99% to 68%.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Biomass Controlled terms:Aerosols - Fire hazards - Fires - Monte Carlo methods - Organic compounds Uncontrolled terms:Average numbers - Biomass-burning - Emission inventories - Emissions inventory - Organic aerosol - Ratio method - Secondary organic aerosols - Yangtze river delta Classification code:804.1 Organic Compounds - 914.2 Fires and Fire Protection - 922.2 Mathematical Statistics Numerical data indexing:Percentage -9.90e+01% to 6.80e+01%, Percentage 6.00e+01% DOI:10.13227/j.hjkx.202001006 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008924 Title:Inversion of Water Quality Parameters Based on UAV Multispectral Images and the OPT-MPP Algorithm Title of translation:基于无人机多光谱影像和OPT-MPP算法的水质参数反演 Authors:Huang, Xin-Xi (1, 2, 3); Ying, Han-Ting (1, 2, 3); Xia, Kai (1, 2, 3); Feng, Hai-Lin (1, 2, 3); Yang, Yin-Hui (1, 2, 3); Du, Xiao-Chen (1, 2, 3) Author affiliation:(1) College of Information Engineering, Zhejiang Agriculture and Forestry University, Hangzhou; 311300, China; (2) Zhejiang Provincial Key Laboratory of Forestry Intelligent Monitoring and Information Technology, Hangzhou; 311300, China; (3) Key Laboratory of Forestry Perception Technology and Intelligent Equipment, State Forestry Administration, Hangzhou; 311300, China Corresponding author:Xia, Kai(xiakai@zafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3591-3600 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Unmanned aerial vehicle (UAV) multispectral remote sensing can be used to monitor multiple water quality parameters, such as suspended solids, turbidity, total phosphorus, and chlorophyll. Establishing a stable and accurate water quality parameter inversion model is a prerequisite for this work. The matching pixel-by-pixel (MPP) algorithm is an inversion algorithm for high resolution features of UAV images; however, it is associated with problems of excessive computation and over-fitting. To overcome these problems, the optimize-MPP (OPT-MPP) algorithm is proposed. In this study, Qingshan Lake in Hangzhou City, Zhejiang Province, was used as the research area. Forty-five samples were collected to construct the OPT-MPP algorithm inversion model for two water quality parameters: the suspended sediments concentration (SS) and turbidity (TU). The results showed that the optimal suspended sediment concentration inversion model had a determination coefficient (R²) of 0.787 0 and a comprehensive error of 0.130 8. The optimal turbidity inversion model had a R² of 0.804 3 and a comprehensive error of 0.150 3. Hence, the inversion of the spatial distribution information for water quality parameters in each experimental area of QingShan Lake was realized by using the optimal models of the two established parameters.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Parameter estimation Controlled terms:Antennas - Lakes - Pixels - Remote sensing - Suspended sediments - Turbidity - Unmanned aerial vehicles (UAV) - Water quality Uncontrolled terms:Determination coefficients - Inversion algorithm - Multispectral images - Multispectral remote sensing - Suspended sediment concentrations - Suspended sediments concentration - Water quality parameters - Zhejiang Province Classification code:445.2 Water Analysis - 483 Soil Mechanics and Foundations - 652.1 Aircraft, General - 741.1 Light/Optics DOI:10.13227/j.hjkx.201911141 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795575 Title:Effect of Ni(Ⅱ) on Anaerobic Ammonium Oxidation and Changes in Kinetics Title of translation:重金属Ni(Ⅱ)对厌氧氨氧化脱氮性能的影响及其动力学特征变化 Authors:Sun, Qi (1); Zhao, Bai-Hang (1); Fan, Sa (1); Zhou, Bang-Lei (1); Li, Yu-Qi (1) Author affiliation:(1) School of Civil Engineering, Beijing University of Technology, Beijing; 100124, China Corresponding author:Zhao, Bai-Hang(bhzh@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2779-2786 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Anaerobic ammonium oxidation (ANAMMOX) is widely used for treatment of ammonium-rich wastewater because of its economic and environmental benefits. However, ANAMMOX bacteria are sensitive to environmental conditions, especially to heavy metals. The short-term and long-term effects of Ni(Ⅱ) on ANAMMOX were studied by batch and continuous flow experiments, respectively. Results showed that low concentrations of Ni(Ⅱ) had promoted nitrogen removal by ANAMMOX and high concentrations inhibited ANAMMOX performance during a short-term period. Compared with the specific anaerobic ammonium oxidation activity (SAA) without Ni(Ⅱ) addition, SAA with 1 mg•L^-1 Ni(Ⅱ) addition increased by 11.14% and the SAA with 100 mg•L^-1 Ni(Ⅱ) addition reduced by 49.55%. The IC50 of Ni(Ⅱ) for ANAMMOX was determined to be 83.86 mg•L^-1. In contrast, long-term Ni(Ⅱ) addition significantly suppressed nitrogen removal of ANAMMOX, and the suppression threshold of Ni(Ⅱ) on ANAMMOX was 15 mg•L^-1. The Monod model was applied to simulate the kinetics of ANAMMOX without Ni(Ⅱ) addition. The qmax0(TN/VSS) and KS0 values were 12.25 mg•(g•h)^-1 and 405.36 mg•L^-1, respectively. The modified Haldane model was suitable to describe the kinetics of ANAMMOX with 50 mg•L^-1 Ni(Ⅱ) addition. The qmax(TN/VSS), KS, and Kivalues were 6.78 mg•(g•h)^-1, 313.2 mg•L^-1, and 1.32, respectively. The inhibition of ANAMMOX by Ni(Ⅱ) is anticompetitive inhibition. In addition, the inhibition of Ni(Ⅱ) on ANAMMOX was mainly related to the content of intracellular Ni(Ⅱ). The IC50intracellular Ni(Ⅱ)(VSS) of intracellular Ni(Ⅱ) was 0.072 mg•g^-1.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Nickel compounds Controlled terms:Heavy metals - Kinetics - Nitrogen removal - Oxidation - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Anammox bacteria - Continuous-flow experiments - Economic and environmental benefits - Environmental conditions - Haldane model - Long-term effects - Low concentrations Classification code:452.4 Industrial Wastes Treatment and Disposal - 531 Metallurgy and Metallography - 802.2 Chemical Reactions - 931 Classical Physics; Quantum Theory; Relativity Numerical data indexing:Mass_Density 1.50e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 3.13e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 4.05e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 8.39e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.11e+01%, Percentage 4.95e+01% DOI:10.13227/j.hjkx.201912051 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278154 Title:Effects of Different Land Use Typess on the Molecular Ecological Network of Soil Bacteria Title of translation:不同土地利用方式对土壤细菌分子生态网络的影响 Authors:Li, Bing (1, 2); Li, Yu-Shuang (1); Wei, Jian-Bing (1); Song, Xue-Ying (1); Shi, Rong-Jiu (2); Hou, Yong-Xia (1); Liu, Si-Yao (1) Author affiliation:(1) Key Laboratory of Regional Polluted Environment Ecological Restoration, Ministry of Education, Shenyang University, Shenyang; 110044, China; (2) Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang; 110016, China Corresponding author:Li, Yu-Shuang(ysli_syu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1456-1465 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The bacterial community composition in four land-use types was determined and the visualized bacterial network was constructed by 16S rDNA Illumina MiSeq high-throughput sequencing technology and a molecular ecological network method. The results show that Proteobacteria, Acidobacteria, Bacteroidetes, Chloroflexi, Actinobacteria, Planctomycetes, Verrucomicrobia, Cyanobacteria, Gemmatimonadetes, Firmicutes, Nitrospirae, and Chlorobi are the main bacteria in this area. The number of nodes of urban green land, paddy field, and dry field bacteria networks is higher, and that of natural forest land is lower. The number of connections and average connectivity of dry fields are the highest; following are those of urban green land and paddy field, and those of natural forest land are the lowest. The four bacterial networks are dominated by positive correlation, and the ratio of competition relationship is TL>LD>HT>ST. The average network path and modularity of the soil bacteria networks of paddy field and dry land are small, while the average connectivity and clustering coefficient are higher. Some flora of Acidobacteria, Firmicutes, and Proteobacteria play an important role in the soil bacterial network in this area. The classification of operational taxonomic units is different among the key nodes of different bacterial molecular ecological networks, and there is almost no overlap. The relative abundance of bacteria of some key nodes in the four bacterial networks is low (<1%), and these are not the main bacteria in this area. The soil microflora in dry land are mainly affected by TP (P<0.05), the soil microflora in paddy field were mainly affected by clay, silt, and water content (P<0.05), and that in natural forest land and urban green land were mainly affected by C/N (P<0.05). The above results show that different land-use patterns lead to changes in soil physical and chemical properties and the interaction between soil bacteria species. The bacterial network of dry land soil is larger and the relationship between species is more complex. The bacteria in different land-use types are mainly cooperative, and the competition is weak. Compared with other land-use types, there is stronger competition between the bacteria in natural forest soil. The soil bacteria in paddy field and dry land are the most sensitive to the external environment, respond more quickly, and the community structure is easier to change. The response of soil bacteria in natural forest land and urban green land is slower, and the disturbance of environmental factors does not affect the whole bacterial ecological network in a short time, and thus the community structure is more stable. Some bacteria have the phenomenon of species role transformation between networks. The abundance and community distribution of microorganisms cannot indicate the strength of their connectivity between network nodes; low-abundance bacteria in soil play an important role in the construction of bacterial networks.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Bacteria Controlled terms:Bacteriology - Ecology - Forestry - Land use - Soils Uncontrolled terms:Bacterial interactions - Different land use types - Ecological networks - High-throughput sequencing - Soil bacterial community Classification code:403 Urban and Regional Planning and Development - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics DOI:10.13227/j.hjkx.201907179 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990440 Title:Characteristics and Influencing Factors of Stable Hydrogen and Oxygen Isotopes in Groundwater in the Permafrost Region of the Source Region of the Yangtze River Title of translation:长江源多年冻土区地下水氢氧稳定同位素特征及其影响因素 Authors:Wang, Shao-Yong (1, 2, 3); He, Xiao-Bo (1, 2); Ding, Yong-Jian (1, 2, 3); Chang, Fu-Xuan (4); Wu, Jin-Kui (1, 2); Hu, Zhao-Fu (1, 3); Wang, Li-Hui (1, 3); Yang, Gui-Sen (3); Deng, Ming-Shan (3) Author affiliation:(1) State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; (2) Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Water Resources Department, Yangtze River Scientific Research Institute, Wuhan; 430010, China Corresponding author:He, Xiao-Bo(hxb@lzb.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:166-172 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We use 84 rainfall samples collected during June to September 2017 from the Dongkemadi basin, source region of the Yangtze River, China, to analyze the characteristics and influencing factors of stable isotopes in groundwater, and further discuss the groundwater recharge sources. The results showed that the range of groundwater δ¹⁸O values in this permafrost region varied from -15.3‰ to -12.5‰ (mean -14.0‰). The range of δD values in groundwater varied from -108.9‰ to -91.7‰ (mean -100.2‰). Compared with local atmospheric precipitation, groundwater isotopes were relatively enriched. The slope and intercept of the groundwater line (GL) in the study area were both lower than of those of the global and local meteoric water lines (GMWL and LMWL), thus indicating that groundwater in the study area was subjected to evaporation during rainfall recharge of groundwater. The d-excess values of groundwater varied from 4.9‰ to 25.0‰ (mean 11.6‰), which was close to the average d-excess value determined for global average rainfall (10‰), but lower than that of rainfall in the study area (15.1‰). The influencing factors on the composition and variation of groundwater isotopes were different in different periods. The permafrost active layer was relatively thin during periods of increasing air temperature, and groundwater isotopes were significantly affected by air temperature. A temperature decrease during the latter part of the sampling period, when the thickness of the permafrost active layer was still increasing, further increased the retention time of infiltrating rainfall in the soil, thereby eventually leading to evaporation that strengthened the enrichment of heavy isotopes in the groundwater. According to the topographic characteristics of the Dongkemadi basin, the isotopic characteristics of the groundwater, and the factors influencing the isotopic composition, we conclude that rainfall was the main source of groundwater recharge. The results of this study provide a scientific basis for studying water cycle processes in the permafrost regions of the source region of the Yangtze River.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Recharging (underground waters) Controlled terms:Atmospheric temperature - Evaporation - Hydrogen - Isotopes - Oxygen - Permafrost - Rain - Rivers - Transport properties - Water piping systems Uncontrolled terms:Atmospheric precipitation - Ground water recharge - Groundwater recharge sources - Isotopic characteristics - Isotopic composition - Source region of the yangtze rivers - Stable hydrogen and oxygen isotopes - Temperature decrease Classification code:443.1 Atmospheric Properties - 443.3 Precipitation - 444.2 Groundwater - 446.1 Water Supply Systems - 802.3 Chemical Operations - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids DOI:10.13227/j.hjkx.201907240 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861854 Title:Structural Characteristics of Microbial Communities in the Sediments of the Niyang River in Tibet Title of translation:西藏尼洋河沉积物中微生物群落结构特征分析 Authors:Liu, Xiao-Dan (1); Huang, Yi (1); Wang, Yong-Hua (1); Wang, Bei-Bei (1); Wu, Bing (2); Lu, Guang-Hua (1) Author affiliation:(1) College of Environment, Hohai University, Nanjing; 210098, China; (2) School of the Environment, Nanjing University, Nanjing; 210023, China Corresponding author:Wang, Yong-Hua(mgflora@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3249-3256 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Niyang River is an important tributary of the Yarlong Zangbo River, which is also an important water source in the Gongbujiangda and Linzhi areas of Tibet. In this study, water and sediment samples from 18 sites in the Niyang River were collected. The physical and chemical properties, concentrations of 12 heavy metals, and the microbial community in the sediments were determined. The microbial community structures in the sediments collected in 2017 and 2018 were highly similar at the phylum and genus levels. The most dominant type of bacteria in the sediment of the Niyang River was Proteobacteria. Other dominant bacteria included Bacteroidetes, Acidbacteria, and Actinobacteria. At the genus level, the abundance of Flavobacterium was high. Other conditional pathogenic bacteria, such as Aeromonas and Acinetobacter, were detected. Cluster analysis found that there were certain spatial differences among the upstream, midstream, and downstream microbial communities. The microbial community of sediments in the power station reservoir area was unique. Correlation analysis showed that the temperature, dissolved oxygen, electrical conductance, Cr, Zn, Sr, and Ba in the sediments had high correlation with abundance of specific microbes at the phylum level. Redundancy analysis suggested that total nitrogen, total phosphorus, dissolved oxygen, Cr, Sr, Ba, and Mn were the main influencing factors of microbial community structure in the sediments of the Niyang River. The results of this study provide data support for understanding the spatial and temporal distribution of the microbial community in sediments of the Niyang River and identifying their environmental impact factors.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Rivers Controlled terms:Bacteria - Chemical analysis - Cluster analysis - Dissolved oxygen - Environmental impact - Heavy metals - Reservoirs (water) - Sediments Uncontrolled terms:Electrical conductance - Environmental impact factors - Microbial communities - Microbial community structures - Pathogenic bacterium - Physical and chemical properties - Spatial and temporal distribution - Structural characteristics Classification code:441.2 Reservoirs - 454.2 Environmental Impact and Protection - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 723 Computer Software, Data Handling and Applications DOI:10.13227/j.hjkx.201912150 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861832 Title:Risk Assessment and Source Analysis of Heavy Metals in the River of a Typical Bay Watershed Title of translation:象山港流域入湾河流水体中重金属风险评价及其来源解析 Authors:Wang, Lei (1); Wang, Wen-Dong (2, 3); Liu, Dong (2, 3); Li, Gang (2, 3); Yu, Hong-Mei (1); Huang, Sha (4); Xu, Yao-Yang (2, 3) Author affiliation:(1) College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua; 321001, China; (2) Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (3) Ningbo Research Center for Urban Environment, Chinese Academy of Sciences, Ningbo; 315800, China; (4) School of Environment and Geographical Sciences, Shanghai Normal University, Shanghai; 200234, China Corresponding author:Li, Gang(gli@iue.ac.cnemailyuhongmei@zjnu.cn)Yu, Hong-Mei(yuhongmei@zjnu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3194-3203 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the survey data of eight kinds of heavy metals in the Xiangshan Bay watershed during the flood season, the pollution status of heavy metals in water was analyzed. The potential ecological risks of heavy metals were evaluated based on the single factor pollution index (Pi), the Nemero comprehensive pollution index (Pn), and the heavy metal pollution index (HPI). Based on the correlation between land-use types and heavy metal concentrations, the sources of heavy metals were analyzed. The results show that the average concentration of heavy metals is in the order Fe>Mn>Zn>Cu>As>Cr>Pb>Cd. All heavy metal concentrations, except those of Mn and Fe, conform to the class I surface water environment quality standard. The risk level of heavy metals is low, and there is no pollution, but some contamination. Agricultural non-point source pollution is the main factor in the contamination of heavy metals. Overall, the heavy metals in the region have not reached the risk threshold. To reasonably avoid the risk of heavy metal pollution in the urban development process, it is important to strengthen the supervision of pollution sources based on agricultural non-point sources.
© 2020, Science Press. All right reserved. Number of references:63 Main heading:River pollution Controlled terms:Agricultural robots - Agriculture - Heavy metals - Land use - Manganese removal (water treatment) - Risk assessment - Surface waters - Urban growth - Watersheds Uncontrolled terms:Agricultural non-point source pollutions - Average concentration - Heavy metal concentration - Heavy metal pollution - Pollution sources - Potential ecological risk - Urban development - Water environments Classification code:403 Urban and Regional Planning and Development - 403.1 Urban Planning and Development - 444.1 Surface Water - 445.1 Water Treatment Techniques - 453 Water Pollution - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201910169 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071058 Title:Spatio-Temporal Distribution and Risk Assessment of Heavy Metals in Middle and Lower Reaches of Le'an River Title of translation:乐安河中下游重金属时空分布特征及风险评价 Authors:Yu, Yang (1); Lü, Ya-Ning (1, 2); Wang, Wei-Jie (1); Qu, Xiao-Dong (1); Liu, Ju-Tao (3); Wen, Chun-Yun (3) Author affiliation:(1) China Institute of Water Resources and Hydropower Research, Beijing; 100038, China; (2) College of Geography and Tourism, Qufu Normal University, Rizhao; 276826, China; (3) Jiangxi Provincial Institute of Water Sciences, Nanchang; 330000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:691-701 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Le'an River is a main tributary of the Poyang Lake, which is the largest freshwater lake in China. The aim of this study is to research the distribution and potential ecological risks of heavy metals in the middle and lower reaches of the Le'an River, which is contaminated by nearby copper mines. Sediment and water samples were collected from 12 stations during the dry, wet, and normal season in 2016, respectively. The geo-accumulation index and potential ecological risk index were used to determine general pollution characteristics of trace metals in sediments. Results suggested that sediments in the Le'an River were considerably polluted by Cd, Pb, Cu, and Zn. Sediment concentrations of heavy metals showed significant spatial variations. The concentrations of heavy metals such as Cu, Zn, and Cd in water are higher in the dry season than in the normal and wet seasons. The distribution of heavy metals along the river is influenced by hydraulic conditions. The flow velocities in wet and normal seasons are positively correlated with the concentrations of heavy metals such as Cd, Pb, Cu, and Cr. There are seasonal differences in the distribution characteristics of heavy metals in surface sediments. In the dry season, the concentration of heavy metals in sediments is the highest in the middle reaches of rivers near mining areas, while during the wet and normal season, it reaches the highest value in the lower reach near the estuary. Except for Cd, whose major form of heavy metal in the sediment is in an exchanging state, the other heavy metals occur mainly in stable states. The assessment of the geo-accumulation index showed significant Cu, Cd, and Cr pollution. Among the heavy metals investigated, Cd was likely to result in more harmful effects.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:River pollution Controlled terms:Copper mines - Drought - Heavy metals - Lakes - Risk assessment - Rivers - Sediments - Trace elements Uncontrolled terms:Distribution characteristics - Ecological risks - Geo-accumulation index - Potential ecological risk - Seasonal differences - Sediment concentration - Spatiotemporal distributions - Temporal spatial distribution Classification code:444 Water Resources - 453 Water Pollution - 483 Soil Mechanics and Foundations - 504.3 Heavy Metal Mines - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201905026 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008945 Title:Pollution Status and Pollution Behavior of Microplastic in Surface Water and Sediment of Urban Rivers Title of translation:城市河道表层水及沉积物中微塑料的污染现状与污染行为 Authors:Zhao, Xin (1); Chen, Hao (2); Jia, Qi-Long (2); Shen, Chen-Si (1); Zhu, Yi (1); Li, Lei (1); Nie, Yun-Han (1); 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 Corresponding author:Ye, Jian-Feng(yejf99@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3612-3620 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Rivers have been a subject of great concern in recent years as they have been found to be the critical path for the transmission of microplastics from terrestrial land to the ocean. However, the pollution status of microplastics and their behavior in the surface waters and sediments of urban rivers located in different urban areas remain unclear. In this study, 16 samples of surface water and sediment from eight rivers in the central and suburban areas of Shanghai Megacity were obtained and analyzed. High-speed cameras and Fourier transform infrared spectrometers were used to identify the abundance, size, color, shape, type, and other characteristics of microplastics in these samples. The results showed that the average abundance of microplastics in the surface waters of urban rivers in Shanghai Megacity was (7.5±2.8) pieces•L^-1, while the corresponding average abundance in the sediment reached (1 575.5±758.4)pieces•kg^-1 (wet weight). The abundance of microplastics was found to increase with the decreasing particle diameter. Among which, microplastics with a size of less than 500 μm, as well as the fibrous shape, transparent color, and Polyester composition, have always dominated in the urban rivers in Shanghai megacity. Comparably, microplastics in the sediments were more diverse in their morphology features and polymer compositions. Microplastic pollution in the urban rivers in Shanghai megacity was severe in comparison to that in other urban rivers worldwide. Among various urban rivers, the distribution of microplastics with different morphology features and polymer compositions is greatly influenced by a number of factors including the source (e. g., mainly laundry wastewater, personal care products, and refuse plastic waste), hydrodynamic conditions, and the physical and chemical properties of plastics. Furthermore, the pollution behavior (i. e., source, transmission, and fate) of microplastics occurring in urban rivers is discussed, and the potential impacts of various environmental factors are explained.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:River pollution Controlled terms:Fourier transform infrared spectroscopy - High speed cameras - Microplastic - Morphology - Plastic products - Plastics industry - Rivers - Sediments - Transmissions Uncontrolled terms:Environmental factors - Fourier transform infrared spectrometer - Hydrodynamic conditions - Laundry wastewaters - Particle diameters - Personal care products - Physical and chemical properties - Polymer composition Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 602.2 Mechanical Transmissions - 742.2 Photographic Equipment - 801 Chemistry - 817.1 Polymer Products - 951 Materials Science Numerical data indexing:Size 5.00e-04m DOI:10.13227/j.hjkx.201912236 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105076 Title:Key Growth Stage of Pb Accumulation in Rice Through a Hydroponic Experiment with Pb Stress Title of translation:水培试验下水稻Pb吸收累积关键生育期 Authors:Hu, Yu-Dan (1); Zhou, Hang (1, 2); Gu, Jiao-Feng (1, 2); Huo, Yang (1); Deng, Peng-Hui (1); Wei, Bin-Yun (1); Liu, Jun (3); Liao, Bo-Han (1, 2) Author affiliation:(1) College of Environmental 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; (3) Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area, Hengyang; 421001, China Corresponding author:Zhou, Hang(zhouhang4607@163.comemailgujiaofeng@163.com)Gu, Jiao-Feng(gujiaofeng@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4218-4225 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Pb accumulation in rice varies significantly at different growth stages. In this study, a hydroponic experiment was conducted to study the effects of exogenous Pb stress on Pb accumulation and transportation in rice plants and determine the key rice growth stages of Pb accumulation and their contribution to the Pb content in brown rice. For the hydroponic experiment, 0.5 mg•L^-1 of exogenous Pb was added to rice at different growth stages, including the tillering stage, jointing stage, booting stage, filling stage, dough stage, maturing stage, and whole growth stage (103 d) of the rice plant. Another treatment of the whole growth stage without Pb stress was established as the control. The results showed that: ① There were no significant effects of Pb stress in any single stage on the plant height, tiller number, and biomass, but the rice plant height and biomass significantly decreased under the Pb stress for the whole growth period. ② Pb contents in different tissues at the maturing stage of the rice plant were in the order of root>stem node 1>other stem nodes>root rhizome>stem>leaf>ear>husk>brown rice. Pb contents in brown rice ranged from 0.1 to 1.2 mg•kg^-1 for all exogenous Pb treatments, and ranked in the growth stages as booting stage>jointing stage>tillering stage>filling stage>maturing stage>dough stage. ③ The relative contribution rates of Pb accumulation in the whole rice plants were relatively high during the reproductive growth period (filling stage, dough stage, and maturing stage), while those in the above-ground parts of the rice plants were relatively high during the vegetative growth stage (tillering stage, jointing stage, booting stage). ④ The booting stage was the key growth period for Pb accumulation in brown rice. Pb stress at this stage contributed 43.3% of Pb content in brown rice, followed by Pb stress at the jointing stage and the tillering stage, with contribution rates of 24.4% and 21.3%, respectively. ⑤ Water management regimes, application of amendments, or leaf resistance control techniques should be applied appropriately at the booting stage of the rice plants to reduce Pb accumulation in brown rice and to realize the safe use of rice paddies polluted with Pb.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Ecology Controlled terms:Filling - Water management Uncontrolled terms:Contribution rate - Different growth stages - Hydroponic experiments - Management regime - Relative contribution - Reproductive growth - Resistance control - Vegetative growth Classification code:454.3 Ecology and Ecosystems - 691.2 Materials Handling Methods Numerical data indexing:Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 2.13e+01%, Percentage 2.44e+01%, Percentage 4.33e+01% DOI:10.13227/j.hjkx.202002179 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658362 Title:Differences Between DNA- and RNA-Based Bacterial Communities in Marine Sediments Title of translation:海洋沉积物中细菌DNA和RNA水平群落差异 Authors:Li, Ming-Yue (1, 2, 3); Yang, Yu-Hong (1, 2, 3); Mi, Tie-Zhu (1, 2, 3); He, Hui (4); Zhen, Yu (1, 2, 3) Author affiliation:(1) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (2) Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266071, China; (3) Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao; 266100, China; (4) College of Marine Life Science, Ocean University of China, Qingdao; 266003, China Corresponding author:Zhen, Yu(zhenyu@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2485-2495 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Microorganisms in marine sediments play crucial roles in biogeochemical processes. Currently, 16S rRNA gene-based sequencing is popular for studying bacterial communities; however, the DNA used in analysis can include not only that from active microorganisms but also that from inactive microorganisms, while the RNA can represent active microorganisms and more recent activity in the environment; therefore, a study of the difference between the total bacterial community based on the 16S rRNA gene and the active bacterial community based on 16S rRNA will support a better understanding of bacterial community structure and function in marine sediments. In this study, the total and active bacterial community structures in surface sediments from the Bohai Sea and South Yellow Sea were investigated at DNA and RNA level using quantitative real-time polymerase chain reaction and Illumina high-throughput sequencing, respectively. The results show that the 16S rRNA gene abundances of bacterial communities are 1-2 orders of magnitude higher than the transcript abundances. The total bacterial community is more diverse compared to the active bacterial community, and there are distinct differences between them. The bacteria in the sediments take part in active chemoheterotrophy, sulfate reduction, and nitrification. Moreover, 16S rRNA gene-based sequencing misestimates some important functional microbiota when exploring bacterial community functions. The 'rare biosphere' in the total bacterial communities consists of actively transcriptional players, which could play key roles in biogeochemistry cycles. Overall, in the analysis of bacterial communities in marine sediments from a stable sedimentary environment, it is beneficial to use the 16S rRNA sequencing to reflect the true ecological status.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Bacteria Controlled terms:Biogeochemistry - DNA - Gene encoding - Polymerase chain reaction - RNA - Sediments - Submarine geology - Sulfur compounds - Transcription Uncontrolled terms:Bacterial community - Bacterial community structure - Biogeochemical process - High-throughput sequencing - Orders of magnitude - Quantitative real-time polymerase chain reaction - Sedimentary environment - Total bacterial communities Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 471.1 Oceanography, General - 483 Soil Mechanics and Foundations - 801.2 Biochemistry DOI:10.13227/j.hjkx.201911071 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658193 Title:Impact of Differents in the Concentrations of Ozone on the Chemical Composition of Single Particles Title of translation:不同浓度臭氧对单颗粒气溶胶化学组成的影响 Authors:Wu, Meng-Xi (1, 2); Cheng, Chun-Lei (1, 2); Huang, Bo (1, 2, 3); Li, Mei (1, 2); Chen, Duo-Hong (4) Author affiliation:(1) Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou; 510632, China; (2) Guangdong Engineering Research Center for Online Atmospheric Pollution Source Apportionment, Guangzhou; 510632, China; (3) Guangzhou Hexin Analytical Instrument Limited Company, Guangzhou; 510530, China; (4) State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Protection Key Laboratory of Atmospheric Secondary Pollution, Guangdong Environmental Monitoring Center, Guangzhou; 510308, China Corresponding author:Li, Mei(limei2007@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2006-2016 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the effect of high concentration of ozone (O3) on the aerosol formation and aging process, this study made observations using a single-particle aerosol mass spectrometer (SPAMS) at Heshan Atmospheric Environment Supervision Station in Guangdong Province in October 2018. During the observation period, a high ozone concentration period (PH) and a low ozone concentration period (PL) were defined according to the level of O3 concentration. The average O3 concentration during PH was 117 μg•m^-3, and that of PL was 25 μg•m^-3. According to the difference in chemical composition, single particles mainly included aging element carbon particles (EC-aged), secondary particles (Sec), and aging organic carbon particles (OC-aged) during the observation period. The total number of single particles in PH (348 085) was higher than in PL (224 797), and the proportion of Sec particles (37.1%) in PH was significantly higher than in PL (27.8%), whereas the proportion of EC-aged particles in PH (32.1%) was lower than in PL (44.1%). The proportion of OC-aged particles in PH (13.5%) was slightly higher than in PL (10.4%). The concentration of particles containing nitrate and sulfate showed significant diurnal changes during PH, but no diurnal changes during PL. The peak area of nitrate and sulfate in the Sec particles and EC-aged particles in PH was higher than in PL, which indicates that the amount of nitrate and sulfate produced by the secondary reaction process in PH was more than in PL. In addition, the peak areas of nitrate and sulfate in the Sec particles were significantly higher than those in the EC-aged particles, indicating that the age of the Sec particles was greater. In this study, acetate (⁵⁹CH3CO2^-) and glyoxal (⁷³C2HO3^-) were selected to represent the changing characteristics of aldehyde and ketone compounds in single-particle aerosols. The number concentration and peak area of ⁵⁹CH3CO2^- and ⁷³C2HO3^- in Sec and OC-aged particles in PH were significantly higher than those in PL, and showed significant diurnal variation characteristic during PH. The peak appeared 2 h after the peak of O3 concentration. In PL, the peak value was significantly reduced, and the change trend was the same as that of the number concentration of Sec and OC-aged particles, indicating that high concentration of O3 is beneficial to the oxidation of VOCs to ⁵⁹CH3CO2^- and ⁷³C2HO3^-. In summary, high concentration of O3 and enhancement of secondary species in single particles were due to the strong photochemical reactions during PH.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:pH Controlled terms:Aerosols - Ketones - Nitrates - Organic carbon - Ozone - Photochemical reactions - Sulfur compounds Uncontrolled terms:Aerosol mass spectrometers - Atmospheric environment - Chemical compositions - Number concentration - Observation Period - Ozone concentration - Secondary particles - Secondary reactions Classification code:741.1 Light/Optics - 801.1 Chemistry, General - 804 Chemical Products Generally Numerical data indexing:Percentage 1.04e+01%, Percentage 1.35e+01%, Percentage 2.78e+01%, Percentage 3.21e+01%, Percentage 3.71e+01%, Percentage 4.41e+01%, Time 7.20e+03s DOI:10.13227/j.hjkx.201910122 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990487 Title:Construction and Evaluation on Size Resolved Source Apportionment Methods Based on Particle Size Distribution of Chemical Species Title of translation:基于颗粒物化学组分粒径分布特征的源解析方法构建与评估 Authors:Liang, Yong-Li (1); Tian, Ying-Ze (1); Liu, Tong (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; 300071, China Corresponding author:Tian, Ying-Ze(tianyingze@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:90-97 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The analysis of the sources of atmospheric particulate pollution can provide scientific support for the prevention and control of air pollution. Most particulate matter (PM) source analysis studies are based on the chemical composition of PM. In addition, particle size characteristics are also one of the important properties of PM. The accuracy of analytical results can be improved by analyzing the particle size characteristics of chemical components. In this study we aim to to solve the problem of insufficient utilization of component particle size information by using a the three-dimensional multi-particle size factor analysis model (ABB), where the particle size distribution of marked components is regarded as the constraint limit, and a multi-particle size source analytical model (SDABB) based on the characteristics of the components particle size distribution is constructed. The sensitivity of the SDABB model to the collinearity of the source spectrum and the similarity of the particle size distribution of the source contributions are investigated by evaluating the model through the simulation of the data set. The results showed that the ABB model was sensitive to the collinearity of the source spectrum and to the similarity of the particle size distribution of the source contributions. When particle size distribution rules were incorporated into the SDABB model, the effects of the two scenarios were significantly improved, that is, the SDABB model was able to better analyze collinear source spectrum and was insensitive to the similarity of the contribution particle size distribution.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Particle size analysis Controlled terms:Air pollution control - Chemical analysis - Light transmission - Particle size - Particles (particulate matter) - Size distribution - Spectrum analysis Uncontrolled terms:Atmospheric particulate - Chemical compositions - Factor analysis model - Particle size information - Particulate Matter - Prevention and controls - Source apportionment - Source contributions Classification code:451.2 Air Pollution Control - 741.1 Light/Optics - 922.2 Mathematical Statistics - 951 Materials Science DOI:10.13227/j.hjkx.201907172 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990474 Title:Rapid Achievement of Nitrifying Micro-granular Sludge and Its Nitritation Function Title of translation:硝化微颗粒污泥快速培养及其亚硝化功能快速实现 Authors:Liu, Wen-Ru (1, 2, 3, 4); Song, Jia-Jun (2); Wang, Jian-Fang (1, 2, 3, 4); Shen, Yao-Liang (1, 2, 3, 4) Author affiliation:(1) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (2) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China; (4) Institute of Water Pollution Control and Resource Recovery, Suzhou University of Science and Technology, Suzhou; 215009, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:353-359 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The rapid achievement of nitrifying micro-granular sludge and its nitritation function was studied in a continuously operated internal-loop airlift reactor seeding with floccular sludge. Results showed that the sludge micro-granulation was almost realized within three weeks by gradually reducing the hydraulic retention time from 5 h to 2.5 h. The color of the sludge first changed from yellowish-brown to creamy white, and then changed to pale yellow during the micro-granulation process. The settleability of the sludge first changed from good to bad, and then recovered to good. The value of the sludge settling velocity (SV) at SV5 and SV30 were both equal to 4%-5%, while SVI30 and SVI5 were both around 12-13 mL•g^-1. The average size of the obtained nitrifying micro-granular sludge was 134 μm on day 27. Nearly 70% of the nitrifying micro-granular sludge was maintained in a relatively narrow range of 59-163 μm, thus indicating the largely homogeneous diameter distribution of these micro-granules. After sludge micro-granulation, the nitritation function was achieved within one week by progressively increasing the influent NH4 concentrations from 50 mg•L^-1to 200 mg•L^-1. The NO2^- accumulation ratio and the nitritation loading rate reached up to 90% and 1.34 kg•(m³•d)^-1, respectively. The high level of residual NH4 concentration in the effluent, or the low ratio of dissolved oxygen (DO) to NH4⁺-N concentrations (0.03-0.09), should be the primary cause of the rapid achievement of nitritation in the micro-granular sludge reactor.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Granular materials Controlled terms:Dissolved oxygen - Granulation - Nitrification Uncontrolled terms:Average size - Diameter distributions - Granular sludge - Granulation process - Hydraulic retention time - Internal loop airlift reactor - Settleability - Sludge settling Classification code:802.2 Chemical Reactions - 802.3 Chemical Operations - 951 Materials Science Numerical data indexing:Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 4.00e+00% to 5.00e+00%, Percentage 7.00e+01%, Percentage 9.00e+01%, Size 1.34e-04m, Size 5.90e-05m to 1.63e-04m, Specific_Volume 1.20e-02m3/kg to 1.30e-02m3/kg, Time 1.80e+04s to 9.00e+03s DOI:10.13227/j.hjkx.201907158 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990493 Title:Refined Assessment of Exposure and Health Risks of Heavy Metals in Water for the Children in Xigu District, Lanzhou Title of translation:兰州市西固区儿童饮用水重金属暴露及健康风险精细化评估 Authors:Chen, Yue-Fang (1); Sun, Shan-Wei (1); Duan, Xiao-Li (1); Xu, Jin-Rong (1); Wang, Juan (1); Kang, Yi-Jin (1); Liang, Wei-Gang (1); Cao, Su-Zhen (1) Author affiliation:(1) Beijing Key Laboratory of Resource Oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing; 100083, China Corresponding author:Cao, Su-Zhen(love-lmd@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:262-272 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Water is an important pathway for human exposure to heavy metals. Accurate assessment of the health risks that are related to exposure to heavy metals in drinking and household water are required for the preparation of targeted health risk prevention measures. This study explores and identifies the health risks related to exposure to heavy metals via drinking and household water pathways in Xigu District, Lanzhou, northwestern China, using household water samples and survey data obtained during July-September 2015 (wet season) and December 2015-January 2016 (dry season). During each period, drinking water and household water that were available for use by children aged 0-5 and 6-17 years were sampled and a questionnaire on water-related behavior patterns was completed for each household. Cd, Cr, Pb, and As concentrations were analyzed in all water samples, and were used along with water-related exposure factors from the questionnaires to estimate exposure doses and associated health risks using models recommended by the United States Environmental Protection Agency (US EPA). The results showed that the concentrations of Cd, Cr, Pb, and As in both drinking and household water samples did not exceed the relative thresholds defined in China's national water quality standards. The concentrations of heavy metals in household water were more affected by seasonal factors than of those of drinking water. The non-cancer and cancer risks were in the ranges of 2.82×10^-8-2.43×10^-2 and 7.55×10^-9-3.62×10^-5, respectively, which are within acceptable levels, although the non-cancer and cancer risks from drinking water were both higher than of those determined for household water. Furthermore, the non-cancer and cancer risks from household water for children aged 0-5 years were lower than of those for children aged 6-17 years in each period. However, the cancer risk from drinking water for children aged 0-5 years was lower than of that for children aged 6-17 years, whereas the reverse was found for non-cancer risks. This study indicates that Cd, Cr, Pb, and As in drinking and household water did not pose significant detrimental effects to human health, and that the refined exposure assessment used could reduce uncertainties in health risk assessments.
© 2020, Science Press. All right reserved. Number of references:62 Main heading:Potable water Controlled terms:Diseases - Environmental Protection Agency - Health risks - Heavy metals - Pollution - Risk assessment - Risk perception - Surveys - Water quality Uncontrolled terms:Behavior patterns - Exposure assessment - Exposure factors - Non-cancer risks - Northwestern China - Seasonal factors - United states environmental protection agencies - Water quality standard Classification code:444 Water Resources - 445.2 Water Analysis - 454.2 Environmental Impact and Protection - 461.7 Health Care - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention Numerical data indexing:Age 0.00e+00yr to 5.00e+00yr, Age 6.00e+00yr to 1.70e+01yr DOI:10.13227/j.hjkx.201904229 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796238 Title:Measurement of Traffic Carbon Emissions and Pattern of Efficiency in the Yangtze River Economic Belt (1985-2016) Title of translation:长江经济带交通碳排放测度及其效率格局(1985~2016年) Authors:Jiang, Zi-Ran (1, 2); Jin, Huan-Huan (1); Wang, Cheng-Jin (2); Ye, Shi-Lin (3); Huang, Yan-Hao (1) Author affiliation:(1) College of Economics and Management, Zhejiang Normal University, Jinhua; 321004, China; (2) Key Laboratory of Regional Sustainable Development Modeling, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (3) College of Geographical Sciences, Fujian Normal University, Fuzhou; 350117, China Corresponding author:Wang, Cheng-Jin(cjwang@igsnrr.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2972-2980 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The "top-down" method was used to measure the traffic carbon emissions from 1985 to 2016 in the Yangtze River Economic Belt and analyze its spatial pattern and temporal evolution characteristics. Considering the unexpected output, a three-stage DEA model was constructed to evaluate and compare the traffic carbon emission efficiency of the Yangtze River Economic Belt, excluding the influence of external environment variables and random errors. The study found that first, the total traffic carbon emissions in the Yangtze River Economic Belt showed a rising trend, among which the carbon emissions from petroleum energy consumption accounted for the largest proportion. Sichuan, Hubei, and Hunan and the Su-Zhe-Hu Region were the high-value areas of traffic carbon emissions in the upper, middle, and lower reaches of the Yangtze River, respectively. Second, from the east to west, the center of traffic carbon emissions generally showed a changing track of moving east first and then west; from the north to south, it highlighted the characteristics of increasing concentrated distribution along the Yangtze River in space. Third, there was an obvious spatial differentiation in the traffic carbon emission efficiency values of different provinces; from 2007 to 2016, the efficiency value of the eastern region was the highest, but the value of the central region changed from higher than that in the western region to lower than that in the western region. Finally, external environmental factors had a significant impact on the efficiency of traffic carbon emissions, in which the optimization of industrial structure was found to be conducive to the improvement of traffic carbon emission efficiency, while the influence of government intervention was changed from "innovation compensation" effect to "compliance cost" effect.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Industrial emissions Controlled terms:Carbon - Energy utilization - Random errors - Rivers - Structural optimization Uncontrolled terms:Carbon emission efficiencies - Environmental factors - External environments - Government intervention - Industrial structures - Spatial differentiation - Spatial patterns - Temporal evolution Classification code:451.1 Air Pollution Sources - 525.3 Energy Utilization - 804 Chemical Products Generally - 921.5 Optimization Techniques DOI:10.13227/j.hjkx.201910221 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071291 Title:Environmental Factors Influence and Microbial Community Structure Analysis of Entrapped Anaerobic Ammonium Oxidizing Bacteria Title of translation:包埋厌氧氨氧化菌的环境因子影响特性及群落结构分析 Authors:Wang, Xiao-Tong (1); Yang, Hong (1); Su, Yang (1); Liu, Xu-Yan (1) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment 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:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:839-848 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To solve the problems of a slow start, easy loss, and easily inhibited activity of the Anammox bacteria suspension culture, polyvinyl alcohol-polypropylene (PVA-PP) was used to prepare the Anammox immobilized filler. To improve the activity of Anammox bacteria and ensure stable operation of the reaction system, the effects of COD interference, change in pH value, and rotating speed on the nitrogen removal characteristics of the immobilized filler were determined in batch tests. Changes in the structure and diversity of the bacteria in the filler were analyzed by a high-throughput sequencing technique. The results showed that the activity of Anammox bacteria could recover to 100% on the 30th day, and the total nitrogen removal rate was 87.7% when the total nitrogen volume load (NLR) was 0.69 kg•(m³•d)^-1 at the stage of 99 days. After 140 days of long-term operation, the total nitrogen removal rate (NRR) reached 1.83 kg•(m³•d)^-1, which was 9.4 times the suspended sludge before immobilization. The diversity of the population was maintained in the inclusion carrier, and the effective enrichment of Candidatus Kuenenia (AF375995.1), which performs anaerobic ammonia-oxidization, increased from 11.06% to 32.55%. The influence of COD interference and changes in the pH value of Anammox bacteria was significantly weakened, and the PVA-PP entrapped carrier could achieve the coupling removal of nitrogen by Anammox and denitrification. Appropriate external hydraulic disturbance would promote the Anammox reaction in immobilized systems.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Nitrogen removal Controlled terms:Ammonia - Bacteria - Fillers - pH - Polypropylenes - Polyvinyl alcohols - Radioactive waste vitrification - Wastewater treatment Uncontrolled terms:Ammonium oxidizing bacteria - ANAMMOX - Environmental factors - High-throughput sequencing - Microbial community structures - Removal characteristics - Suspension cultures - Total nitrogen removal Classification code:452.4 Industrial Wastes Treatment and Disposal - 801.1 Chemistry, General - 804.2 Inorganic Compounds - 815.1.1 Organic Polymers Numerical data indexing:Age 2.71e-01yr, Age 3.84e-01yr, Percentage 1.00e+02%, Percentage 1.11e+01% to 3.25e+01%, Percentage 8.77e+01% DOI:10.13227/j.hjkx.201908157 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071158 Title:Characterization, Seasonal Variation, and Source Apportionments of Particulate Amines (PM2.5) in Northern Suburb of Nanjing Title of translation:南京北郊四季PM2.5中有机胺的污染特征及来源解析 Authors:Li, Xu-Jie (1, 2); Shi, Xiao-Wen (1, 2); Ma, Yan (1, 2); Zheng, Jun (1, 2) Author affiliation:(1) School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing; 210044, China Corresponding author:Zheng, Jun(junzheng70@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:537-553 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:PM2.5samples were collected from December 2017 to November 2018 at a northern suburb site of Nanjing. The concentrations of five amines, major water-soluble ions, organic carbon, and elemental carbon were determined. The five amines measured were methylamine, ethylamine, dimethylamine, trimethylamine, and aniline. The annual average of the total amine concentration was (54.2±29.2) ng•m^-3. Among these, dimethylamine was the most abundant [annual average: (20.2±13.7) ng•m^-3], followed by methylamine [annual average: (13.1±6.3) ng•m^-3], trimethylamine [annual average: (8.6±4.1) ng•m^-3], ethylamine [annual average: (6.3±4.1) ng•m^-3], and aniline [annual average: (5.9±3.9) ng•m^-3]. The total amine concentration showed explicit seasonal variations: summer>autumn>spring>winter. The amine concentration on polluted days was higher than that on clean days. This may be influenced by aerosol acidity, promoting the partitioning of gaseous amine into the particulate phase. Aerosol acidity was also the major reason for the higher concentration of amine observed in summer than in other seasons. During new particle formation events, the concentrations of amines increased substantially. Positive matrix factorization (PMF) was utilized to identify the potential sources of amines, identifying six sources: industrial emission, agriculture emission, biomass burning, automobile emission, secondary formation, and dust. Methylamine and ethylamine mainly originated from secondary formation and automobile emissions. Dimethylamine and trimethylamine mainly originated from biomass burning, secondary formation, and automobile emissions; Aniline mainly originated from industrial emissions and biomass burning. A significant seasonal difference is observed with respect to the sources of amines. In spring and autumn, road dust sources account for a relatively high proportion. In summer, secondary sources are the main sources of amines. However, the diurnal variations of amine are not evident, and the secondary source, motor vehicle emission, and biomass combustion are the three main influencing factors.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Industrial emissions Controlled terms:Aerosols - Agricultural robots - Amination - Amines - Aniline - Automobiles - Biomass - Combustion - Dust - Factorization - Ion chromatography - Matrix algebra - Organic carbon - Particles (particulate matter) - Springs (components) Uncontrolled terms:Automobile emission - Biomass combustion - Motor vehicle emissions - New particle formation - Positive Matrix Factorization - Seasonal differences - Source apportionment - Water-soluble ions Classification code:451.1 Air Pollution Sources - 601.2 Machine Components - 662.1 Automobiles - 801 Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 921 Mathematics - 921.1 Algebra - 951 Materials Science DOI:10.13227/j.hjkx.201908212 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990495 Title:Effects of Intermittent Starvation on the Operation of the SNAD Process Title of translation:基于间歇饥饿的SNAD工艺运行 Authors:Li, Dong (1); Liu, Zhi-Cheng (1); Xu, Gui-Da (1); Wang, Yu-Ying (1); Zhang, Jie (1, 2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architecture and Civil 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:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:337-344 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We report on and discuss the effects of intermittent starvation on the operation of the simultaneous partial nitrification, ANAMMOX, and denitrification (SNAD) process. The SNAD process was carried out in a sequencing batch reactor (SBR) at room temperature (22℃±3℃), and the intermittent starvation was achieved by periodically extending the hydraulic retention time (HRT) of the system. The results showed that after the operation of intermittent starvation, the NO3^--N concentration at the end of the aerobic phase decreased to 8.72 mg•L^-1 and the NO2^- accumulation percentage reached 83.18%, which indicated that the nitrite oxidizing bacteria (NOB) activity was effectively inhibited and that the nitritation performance improved. After the operation of the intermittent starvation, the ratio of NO2^- to NH4⁺-N at the end of the aerobic phase was adjusted to provide more suitable substrates for the subsequent ANAMMOX process, such that the concentration of NH4⁺-N in the effluent fell below 1.0 mg•L^-1. At the same time, due to the decrease of the NO3^- concentration, the total N removal rate reached 92.07%, which indicated that the treatment performance improved. By determining the activity of the functional bacteria, we found that the main reason for the improvement in the nitritation performance after starvation was that the decay rate of the ammonia oxidizing bacteria (AOB) activity during the starvation period was lower than of the decay rate of the NOB activity, and that the recovery rate of the AOB activity during the recovery period was significantly higher than that of the NOB.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Aerobic bacteria Controlled terms:Ammonia - Batch reactors - Decay (organic) - Nitrogen oxides - Nitrogen removal - Wastewater treatment Uncontrolled terms:Ammonia oxidizing bacteria - Functional bacteria - Hydraulic retention time - Nitrite-oxidizing bacteria - Partial nitrification - Recovery periods - Sequencing batch reactors - Treatment performance Classification code:452.4 Industrial Wastes Treatment and Disposal - 461 Bioengineering and Biology - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 1.00e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 8.72e-03kg/m3 to 2.20e-02kg/m3, Percentage 8.32e+01%, Percentage 9.21e+01% DOI:10.13227/j.hjkx.201908028 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608862007 Title:Occurrence and Prediction Model of Disinfection By-Products in Tap Water Title of translation:供水管网终端消毒副产物分布特征及预测模型 Authors:Liu, Jun-Ping (1); Chen, Jing-Ji (1); Song, Ya-Li (2); Yang, Yu-Long (3); Li, Qing-Song (4); Ma, Xiao-Yan (1) Author affiliation:(1) College of Civil Engineering, Zhejiang University of Technology, Hangzhou; 310014, China; (2) School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou; 310023, China; (3) College of Civil Engineering and Architecture, Zhejiang University, Hangzhou; 310058, China; (4) Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen; 361005, China Corresponding author:Ma, Xiao-Yan(mayaner620@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3307-3314 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Disinfection by-products (DBPs) are defined as important parameters that can deteriorate drinking water quality. The investigation was performed at a laboratory located on a campus in H City of the Zhejiang province. The purpose of the work was to obtain knowledge on the occurrence of DBPs in tap water and boiled water taken from the same pipe, to establish a statistical model to predict DBPs information in tap water based on physicochemical parameters, and to evaluate carcinogenic and non-carcinogenic risks caused by DBPs on a predictional level. The results showed three categories of trihalomethanes (THMs), haloacetonnitrile (HANs), and haloacetic acids (HAAs), including 10 species of disinfection by-products detected in drinking water. The detection rate of target DBPs in tap water was 100% and the concentrations varied in the ranges of 10.12-28.39, 0.98-5.19, and 2.65-7.83 μg•L^-1, respectively. In boiled water, bromochloracetonitrile (BCAN) was not detected; the detection rates of tribromomethane(TBM), trichloroacetonitrile (TCAN), and dibromoacetonitrile (DBAN) were 46.43%, 82.14%, and 92.86%, respectively, while the detection rate for other DBPs was 100%. The concentrations of THMs, HANs, and HAAs were in the ranges of 0.60-12.58, 0.02-0.52, and 2.42-5.86 μg•L^-1, respectively. After heating, the concentrations of THMs and HANs decreased by 84.22% and 91.45%, respectively. No obvious decrease was found for HAAs. The pH value and specific ultraviolet absorbance (SUVA) had positive correlation with DBPs, whereas residual chlorine and ammonia nitrogen had negative correlation with DBPs. Based on the correlation between the physicochemical parameters and DBPs, a multiple linear regression prediction model of THMs was established, with deviation less than 10.00%, which can be used for the prediction of THMs in tap water. Based on the EPA recommended health risk assessment model, the carcinogenic and non-carcinogenic risks of chlorine disinfection by-products through oral intake were calculated. It was found that the carcinogenic risks caused by the disinfection by-products in the tap and boiled water were (17.24-84.63)×10^-6 and (25.49-258.82)×10^-7, respectively, and the non-carcinogenic risks were (4.17-50.32)×10^-2 and (6.52-107.74)×10^-3, respectively. The carcinogenic risk caused mainly by THMs and bromodicloromethane (BDCM) contributed the highest cancer risk in tap water, while for boiled water, trichloromethane (TCM) was found to contribute the highest cancer and non-carcinogenic risk. In boiled water, the reduction of THMs was up to 94.38%, and the cancer risk was reduced by 79.00%.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Potable water Controlled terms:Ammonia - Chlorine - Diseases - Disinfection - Forecasting - Health risks - Linear regression - Predictive analytics - Risk assessment - Water quality Uncontrolled terms:Chlorine disinfection - Disinfection by-product - Disinfection byproducts - Multiple linear regressions - Physicochemical parameters - Positive correlations - Specific ultraviolet absorbance - Trichloroacetonitrile Classification code:444 Water Resources - 445.2 Water Analysis - 461.7 Health Care - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Mass_Density 2.42e-06kg/m3 to 5.86e-06kg/m3, Mass_Density 2.65e-06kg/m3 to 7.83e-06kg/m3, Percentage 1.00e+01%, Percentage 1.00e+02%, Percentage 4.64e+01%, Percentage 7.90e+01%, Percentage 8.21e+01%, Percentage 8.42e+01%, Percentage 9.15e+01%, Percentage 9.29e+01%, Percentage 9.44e+01% DOI:10.13227/j.hjkx.202001045 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861989 Title:Relationship Between CO2 and CH4 Emissions in Urban Rivers and Sewage Discharging from a Municipal Drainage Network Title of translation:城镇河流CO2及CH4排放与市政排水管网污水输入的关联影响 Authors:Li, Lei (1); Chen, Hao (2); Zhu, Yi (1); Wang, Yu-Hui (1); Nie, Yun-Han (1); Zhao, Xin (1); Jia, Qi-Long (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 Corresponding author:Ye, Jian-Feng(yejf99@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3392-3401 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The increasing carbon emission of polluted rivers in urban areas is an environmental problem commonly faced by many cities in China, especially the megacities with vast populations. In this study, two typical rivers located in the megacity of Shanghai, including the suburban river network R1 and urban river R2 (in the central city), were investigated for their emission characteristics of CO2 and CH4 in dry and wet weather. We also analyzed the relationship between the state and type of river pollution and CO2 and CH4 emissions, and further explained the mechanisms of CO2 and CH4 emissions in urban rivers impacted by sewage discharged from the municipal drainage network. The results show that: ① In dry weather, the average fluxes of CO2 and CH4 emitted from the river in the central city (R2) were (2.48±1.02) mmol•(m²•h)^-1 and (1.21×10^-2±0.71×10^-2) mmol•(m²•h)^-1, respectively. The average fluxes of CO2 and CH4 from the suburban river (R1) network were (1.53±0.39) mmol•(m²•h)^-1 and (9.26×10^-3±9.18×10^-3) mmol•(m²•h)^-1, respectively. In wet weather, affected by sewage from the municipal drainage network, CH4 flux emitted from the surface water of the R2 river downstream of the pump station P increased by up to 119 times that in dry weather. ② Global carbon emission statistics, involving the data from our study and from other rivers around the world, seemed to imply a relationship between the carbon emission flux and the pollution state of an urban river, i.e., the rivers with high pollution showed significant carbon emission intensity. ③ According to the results of PCA, organic matter can be an essential factor in driving the variation of carbon emissions, and this trend is evident in all the rivers in urban and suburban areas. The relationship between carbon emissions and nitrogen pollution in a river varies with different types of underlying riparian surface. In the less polluted urban rivers, the aquatic physical factor can also be an essential factor. ④ In the short term, with massive quantities of sewage discharged into urban rivers, a large amount of CH4 flux can be emitted. In contrast, in the long run, the carbon cycle can be strengthened when the carbon storage is increased, and thus the emission potential of CO2 and CH4 is improved.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:River pollution Controlled terms:Carbon dioxide - Digital storage - Drainage - Rivers - Sewage Uncontrolled terms:Carbon emission intensities - Emission characteristics - Emission potential - Environmental problems - Global carbon emission - Massive quantities - Nitrogen pollution - Urban and suburban areas Classification code:452.1 Sewage - 453 Water Pollution - 722.1 Data Storage, Equipment and Techniques - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201912080 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278103 Title:Sorption of Polybrominated Diphenyl Ethers by Virgin and Aged Microplastics Title of translation:新制和老化微塑料对多溴联苯醚的吸附 Authors:Xu, Peng-Cheng (1); Guo, Jian (1); Ma, Dong (1); Ge, Wei (2); Zhou, Zhen-Feng (1); Chai, Chao (1) Author affiliation:(1) College of Resources and Environment, Qingdao Agricultural University, Qingdao; 266109, China; (2) College of Life Sciences, Qingdao Agricultural University, Qingdao; 266109, China Corresponding author:Chai, Chao(chaichao1999@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1329-1337 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The sorption kinetics and isothermal sorption of polybrominated diphenyl ethers (PBDEs) by virgin and aged polyethylene (PE) and polystyrene (PS) microplastics with irradiation by ultraviolet light were studied, with 2, 2', 4, 4' -tetrabromodiphenyl ether (BDE-47) as a representative compound. The influence of different environmental factors, including salinity and dissolved organic matter, on its sorption were analyzed. The virgin and aged microplastics were characterized by scanning electron microscopy, x-ray diffraction, and total reflection infrared spectroscopy. The different models of kinetics and sorption isotherm were used to fit the data, and the sorption mechanism of PBDEs by microplastics was analyzed. The results showed that the main sorption modes of virgin and aged PE were surface sorption and external liquid film diffusion. The virgin and aged PS presented the surface sorption. The sorption isotherm was consistent with the Freudlich model, indicating that the sorption of BDE-47 by microplastics was characterized by a multi-phase, multi-layer, and non-uniform sorption process. The equilibrium sorption capacities of BDE-47 on virgin PE, aged PE, virgin PS, and aged PS were 3.72, 3.76, 6.04, and 3.46 ng•g^-1, respectively. There was no obvious difference in equilibrium sorption capacity between the aged and virgin PE. However, the equilibrium sorption capacity for the aged PS was decreased by 42.38% compared with that of the virgin PS. The partition of the outer liquid membrane diffusion was the main mechanism affecting sorption of PBDEs by PE. Compared with the virgin PS, the increase in crystallinity and surface oxygen-containing functional groups led to a decrease in the equilibrium sorption capacity of PBDEs on the aged PS. The sorption of BDE-47 was not significantly influenced by salinity. However, dissolved organic matter exerted a negative effect on the sorption of BDE-47.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Sorption Controlled terms:Adsorption isotherms - Aging of materials - Biogeochemistry - Crystallinity - Ethers - Infrared spectroscopy - Liquid films - Microplastic - Organic pollutants - Scanning electron microscopy Uncontrolled terms:Dissolved organic matters - Environmental factors - Equilibrium sorption - Liquid film diffusion - Microplastics - Polybrominated diphenyl ether (PBDEs) - Representative compound - Total reflection infrared spectroscopy Classification code:481.2 Geochemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 4.24e+01% DOI:10.13227/j.hjkx.201908029 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278107 Title:Air Pollutant Emission Inventory from LTO Cycles of Aircraft in the Beijing-Tianjin-Hebei Airport Group, China Title of translation:京津冀机场群飞机LTO大气污染物排放清单 Authors:Han, Bo (1); Kong, Wei-Kai (1); Yao, Ting-Wei (1); Wang, Yu (1) Author affiliation:(1) Tianjin Key Laboratory for Air Traffic Operation Planning and Safety Technology, College of Air Traffic Management, Civil Aviation University of China, Tianjin; 300300, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1143-1150 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the International Civil Aviation Organization's standard emission model, this survey collected the actual flight conditions of the nine airports in the Beijing-Tianjin-Hebei airport group, fully considered the impact of the height of the atmospheric mixed layer, and revised the operating time using the US Environmental Protection Agency method to accurately estimate the 2018-2019 shipping season (364 days) landing and take-off cycle (LTO) air pollutant emissions list for Beijing-Tianjin-Hebei airport group aircraft. The results show that the total emissions of NOx, CO, SO2, HC, and PM in the LTO cycle of the Beijing-Tianjin-Hebei airport group in the 2018-2019 season are 10 720.5, 3 972.2, 407.8, 508.0, and 53.7 t, respectively. Within these, the winter and spring season emissions are 4 290.2, 1 646.7, 168.3, 220.1, and 22.4 t, respectively; and the summer and autumn season emissions are 6 430.3, 2 325.5, 239.5, 287.9, and 31.3 t, respectively. From the perspective of spatial distribution, Beijing Capital Airport is the airport in the group with the largest amount of air pollutants discharged. Regarding time distribution, the highest peak is at 07:00-08:00, there is a medium-high emission level from 12:00-20:00, and the emissions are relatively low after 21:00. The aircraft emit more NOxand CO in the LTO cycle, with PM accounting for the least amount of emissions. The discharges of different pollutants under different working modes are significantly different. Of all the aircraft in the airport group, the B777 unit LTO discharges the most pollutants, that of the B737 is the least, and the B787 unit LTO circulation HC is the lowest.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Air pollution Controlled terms:Aircraft - Airports - Civil aviation - Environmental Protection Agency Uncontrolled terms:Actual flight conditions - Air pollutant emission - Air pollutants - Airport groups - Emission inventories - International civil aviation organization's - Tianjin - US Environmental Protection Agency Classification code:431.1 Air Transportation, General - 431.4 Airports - 451 Air Pollution - 454.2 Environmental Impact and Protection - 652.1 Aircraft, General Numerical data indexing:Age 9.97e-01yr DOI:10.13227/j.hjkx.201908199 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795589 Title:Comparative Phosphorus Accumulation and Ca-P Content of Two Submerged Plants in Response to Light Intensity and Phosphorus Levels Title of translation:不同光照和磷水平下两种沉水植物磷富集和钙磷含量的比较 Authors:Sang, Yu-Xuan (1); Yang, Jia-Le (2); Xiong, Yi (1); Yin, Wen-Bo (1); Wang, Hua (3); Wang, He-Yun (1) Author affiliation:(1) Key Laboratory of Ecological of Lakes and Rivers and Algal Utilization of Hubei Province, School of Civil and Environment, Hubei University of Technology, Wuhan; 430068, China; (2) Wuhan Britain-China School, Wuhan; 430022, China; (3) Institute for Plant Protection and Soil Science, Hubei Academy of Agricultural Sciences, Wuhan; 430064, China Corresponding author:Wang, Hua(wanghua4@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2698-2705 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The micro-environment formed by the photosynthesis of submerged plants is conducive to the formation of CaCO3-P from co-precipitation of calcium and phosphorus in water, thereby permanently removing phosphorus from water to the bottom mud and avoiding secondary pollution after plants decay. However, CaCO3-P co-precipitation shows obvious specific-differences and environmental dependencies. In the present study, two different submerged plants, Myriophyllum aquaticum and Potamogeton crispus, were used as the research objects. Two variables, inorganic phosphorus level (0, 0.2, and 2 mg•L^-1) and light intensity [66 μmol•(m²•s)^-1and 110 μmol•(m²•s)^-1], were set. After cultivating for a week, the plant relative growth rate, plant total phosphorus, plant ash phosphorus, and Ca-P were measured to analyze the actual ability of phosphorus accumulation and clarify the effect of plant corruption on phosphorus increase in the water body. Results revealed that under various culture conditions, the relative growth rates (RGR) of P. crispus were significantly higher than those of M. aquaticum, and RGR reached the maximum at a P level of 2 mg•L^-1 and a light intensity of 66 μmol•(m²•s)^-1. The addition of inorganic phosphorus significantly affected plant ash phosphorus of the two plants (P. crispus 95.681%, M. aquaticum 85.432%), and the highest value of Ca-P content in the ash phosphorus of the two submerged plants appeared at a high phosphorus level. The total phosphorus in P. crispus was lower than that in M. aquaticum under various treatments, but the total ash phosphorus and Ca-P levels were higher than those in M. aquaticum. Consequently, M. aquaticum and P. crispus can effectively accumulate phosphorus during growth. However, the actual ability of P. crispus of removing phosphorus from water by the formation of CaCO3-P was higher than that of M. aquaticum at a P level of 2 mg•L^-1.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Phosphorus Controlled terms:Calcite - Calcium carbonate - Coprecipitation - Growth rate - Water pollution Uncontrolled terms:Culture conditions - Inorganic phosphorus - Microenvironments - Myriophyllum aquaticum - Phosphorus levels - Relative growth rate - Secondary pollution - Total phosphorus Classification code:453 Water Pollution - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 2.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 8.54e+01%, Percentage 9.57e+01% DOI:10.13227/j.hjkx.201909258 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070466 Title:Performance Assessment of Permeable Interlocking Concrete Pavement Facility Structure Title of translation:透水砖铺装的设施构造对运行效果的影响 Authors:Zhang, Jia-Wei (1); Liu, Yong (1); Jin, Jian-Rong (1); T., Li Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China Corresponding author:Li, Tian(tianli@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:750-755 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Two permeable parking lots and one impervious concrete pavement were constructed in Shanghai to study the hydrological and water quality performance of permeable interlocking concrete pavements (PICP) with different base course materials. The hydrological performance and water quality of the influent and effluent under actual precipitation conditions in 2018 were monitored, and the two PICPs used cement-stabilized crushed stones (PICP1) and crushed stones (PICP2) as the base course, respectively. Results show that the annual total volume reduction rates of PICP1 and PICP2 are 37.0% and 38.7%, respectively. The peak flow reduction rate and the time to the peak flow of PICP1 are slightly better than PICP2. PICP1 has better transformation efficiency on NH4⁺-N in comparison to PICP2, and the release of NO3^--N occurs in both PICPs. Moreover, PICP1 has lower effluent concentrations than PICP2 on pollutants like TSS, TP, PP, and DP. The PICP with cement-stabilized crushed stones as base course is helpful to improve the hydrological performance and water quality of the effluent.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Concretes Controlled terms:Cements - Concrete pavements - Effluents - Water quality Uncontrolled terms:Crushed stones - Effluent concentrations - Hydrological effects - Performance assessment - Permeable pavements - Transformation efficiency - Water quality improvements - Water quality performance Classification code:412 Concrete - 412.1 Cement - 445.2 Water Analysis - 452.3 Industrial Wastes Numerical data indexing:Percentage 3.70e+01%, Percentage 3.87e+01% DOI:10.13227/j.hjkx.201908085 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070862 Title:Accumulation and Translocation of Cd in Brassica rapa Under the Influence of Selenium Title of translation:青菜中镉的吸收和累积对硒的响应规律 Authors:Yu, Yao (1); Luo, Li-Yun (1); Liu, Zhe (1); Fu, Ping-Nan (1); Li, Hua-Fen (1) Author affiliation:(1) Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China Corresponding author:Li, Hua-Fen(lihuafen@cau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:962-969 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cadmium (Cd) is a highly toxic heavy metal. Brassica rapa (pak choi) is a vastly common vegetable, which readily accumulates Cd. Given the current conditions of Cd contamination in domestic soil, it is important to reduce Cd accumulation in the edible part of pak choi. Research has shown that selenium (Se) can regulate Cd uptake by plants. Cd accumulation (three cultivars) and Cd uptake kinetics in pak choi were investigated under hydroponic conditions. Results showed that the three levels of selenite significantly reduced Cd content in the Hangzhouyoudonger shoot by 50%, while the levels in Suzhouqinggen and Shanghaiqing shoots were not significantly decreased with elevated levels of selenite. Selenite reduces the Cd translocation factors, and higher levels had more obvious effects; 50 μmol•L^-1of selenite significantly decreased the factors by 50% in Hangzhouyoudonger and Suzhouqinggen shoots. Selenite also increased iron (Fe) and manganese (Mn) contents in pak choi, especially in the Hangzhouyoudonger shoot, where 50 μmol•L^-1 increased the Fe content by approximately 50%. In the uptake kinetics of Cd, both selenite and selenate significantly increased Cd uptake rates and Vmax by over 100%. Therefore, Se could reduce Cd accumulation in pak choi. This also depended on the tested cultivar. Therefore, reduction effects of Se on the Cd content mainly stemmed from the alteration of Cd translocation in pak choi instead of the uptake competition between Cd and Se.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Soil pollution Controlled terms:Cadmium - Heavy metals - Kinetics - Plants (botany) - Selenium - Selenium compounds Uncontrolled terms:Cd accumulation - Elevated level - Pak choi - Reduction effects - Toxic heavy metals - Translocation - Translocation factor - Uptake kinetics Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 931 Classical Physics; Quantum Theory; Relativity Numerical data indexing:Molar_Concentration 5.00e-02mol/m3 to 2.20e-02mol/m3, Percentage 1.00e+02%, Percentage 5.00e+01% DOI:10.13227/j.hjkx.201909054 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368736 Title:Evolution Characteristics and Driving Factors of Denitrification Community Based on Network Analysis in the Process of Spring Thermal Layer Formation in Zhoucun Reservoir Title of translation:基于网络分析解析水源水库春季水体反硝化群落演变特征及驱动因素 Authors:Zhou, Shi-Lei (1); Sun, Yue (1); Zhang, Yi-Ran (1); Huang, Ting-Lin (2); Zhang, Chun-Hua (2); Fang, Kai-Kai (2); Zeng, Ming-Zheng (2); Li, Zai-Xing (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; (2) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1666-1675 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Combined with on-site water quality investigation and nirS gene high-throughput sequencing technology, the evolution characteristics and influencing factors of the denitrification community during the formation of spring thermal stratification in Zhoucun Reservoir were analyzed. The results show that the water body stratification gradually formed during this period, and the environmental factors (NO3^-, NH4⁺, TN, TOC, BOD5, permanganate index, TP, Fe, and Mn) showed significant differences (P<0.01); nitrogen showed a significant decline process. High-throughput sequencing provided 8703 OTU, which were divided into three phyla and eight major genera, proteobacteria accounted for the largest proportion with 45.27%-78.90%. The α-diversity except for the Simpson index showed that the ACE index, Chao index, Shannon index, and coverage index showed significant differences (P<0.05). The principal coordinate analysis showed the denitrification community exhibited significant differences in the spring, which was consistent with adonis result (P<0.001); network analysis (OTU-OTU) showed that there were seven main modules in this period, including 316 edges of 131 nodes, and the proportion of positive correlation edges was 95.25%. Network analysis (OTU-environmental factors) showed that there were five modules in this period, including 329 edges of 140 nodes, and the proportion of positive correlation edges was 51.98%. Sixty-two indicator OTU and 28 keystone OTU were obtained based on the indicator OTU analysis and network analysis. RDA and mantel test analysis indicated that T, DO, NO3^-, TN, TOC, BOD5, and TP were the main environmental factors driving the denitrifying bacterial community structure and the key denitrifying OTU evolution in spring. Our results will provide technical support for the migration and transformation of nitrogen in reservoir water and pollution control.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Factor analysis Controlled terms:Denitrification - Electric network analysis - Manganese removal (water treatment) - Nitrogen - Potable water - Reservoirs (water) - Springs (components) - Springs (water) - Surface waters - Water pollution - Water pollution control - Water quality Uncontrolled terms:Bacterial community structure - Driving factors - Environmental factors - Evolution characteristics - High-throughput sequencing - Positive correlations - Principal coordinate analysis - Technical support Classification code:441.2 Reservoirs - 444 Water Resources - 444.1 Surface Water - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 601.2 Machine Components - 703.1.1 Electric Network Analysis - 802.2 Chemical Reactions - 804 Chemical Products Generally - 922.2 Mathematical Statistics Numerical data indexing:Percentage 4.53e+01% to 7.89e+01%, Percentage 5.20e+01%, Percentage 9.52e+01% DOI:10.13227/j.hjkx.201908189 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278173 Title:Analysis of Pollution Characteristics and Sources of Atmospheric VOCs in Ezhou City Title of translation:鄂州市大气VOCs污染特征及来源解析 Authors:Fu, Yu-Meng (1); Yang, Hong-Gang (1); Lu, Min-Yu (1); Zeng, Yan (1); Zou, Jia-Xin (1) Author affiliation:(1) College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan; 430070, China Corresponding author:Yang, Hong-Gang(yhg0722@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1085-1092 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:From March 2018 to February 2019, quantitative detection was made of 102 kinds of atmospheric volatile organic compounds (VOCs) using online gas chromatography in Ezhou City. We compared and analyzed the composition, seasonal variation, and diurnal variation of VOCs. Using maximum incremental reactivity (MIR), we estimated the ozone generation potential (OFP) of VOCs. The results show that the annual average volume fraction of atmospheric VOCs in Ezhou is (30.78±15.89)×10^-9, and is overall higher in winter than summer, represented by alkane>oxygen>halogenated hydrocarbon>olefin>aromatic hydrocarbon>alkyne. The night volume fraction is higher than in the daytime, and overall the distribution is "double peak". The aromatic hydrocarbons, halogenated hydrocarbons, and OVOCs appear as a "third peak" at 00:00-02:00. Aromatic hydrocarbons and olefins contribute more to the OFP potential of VOCs, with contribution rates of 35.45% and 29.5%, respectively. The highest contribution rate to OFP is ethylene, reaching 24.217%. Analysis of VOC characteristic species found that vehicle exhaust fumes and solvent volatilization are the main sources of VOCs in Ezhou. Of these, motor vehicle emissions are the most important source. Controlling Ezhou's motor vehicle emissions helps to reduce the composition of atmospheric VOCs, thereby reducing ozone production.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Aromatic hydrocarbons Controlled terms:Air pollution - Aromatization - Ethylene - Gas chromatography - Halogenation - Mineral oils - Organic solvents - Ozone - Vehicles - Volatile organic compounds - Volume fraction Uncontrolled terms:Characteristic pollutants - Halogenated hydrocarbons - Maximum incremental reactivities - Motor vehicle emissions - Online gas chromatography - Ozone generation - Source resolution - Vehicle emission Classification code:451 Air Pollution - 513.3 Petroleum Products - 641.1 Thermodynamics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 2.42e+01%, Percentage 2.95e+01%, Percentage 3.55e+01% DOI:10.13227/j.hjkx.201908112 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008934 Title:Effects of Ozone Pollution on Growth, Yields, and Mineral Metallic Element Contents of Paddy Rice Title of translation:臭氧污染对水稻生长, 产量及矿质金属元素含量的影响 Authors:Fang, Xiao-Kun (1); Luo, Xiao-San (1); Zhang, Dan (1); Wu, Li-Chun (1); Qiu, Dan (2); Chen, Zhi-Wei (1); Zhao, Zhen (1) Author affiliation:(1) Jiangsu Key Laboratory of Agricultural Meteorology, Department of Agricultural Resources and Environment, School of Applied Meteorology, Nanjing; 210044, China; (2) China Jiangsu Farmland Quality and Agricultural Environmental Protection Station, Nanjing; 210036, China Corresponding author:Luo, Xiao-San(xsluo@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3797-3803 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The increase in the surface ozone (O3) concentration causes air pollution, which has become a significant environmental issue that is of increasing concern. Ozone pollution not only directly harms human health, but also influences the agricultural ecosystem by impacting crop growth, which may then indirectly affect human health through food quality and the safety of agricultural products. The effects of O3 pollution on rice growth, yields, and mineral metal contents in grains were investigated through field experiments with increased O3concentration treatment (remaining at 100 nL•L^-1) in open top chambers (OTC). The crop growth and metal contents of two rice varieties were analyzed and compared. The results showed that the higher O3 concentration inhibited the photosynthesis of Nanjing 5055 and Yangdao 6 rice leaves, reduced the chlorophyll content and leaf area index, and subsequently led to a decline in the rice yield of 45.5% and 28.6%, respectively. However, compared with the natural control, the contents of most mineral metallic elements in the brown rice and glume of the harvested grains increased by 3.6%-19.8% and 3.9%-36.0%, respectively, thus resulting in a lack of essential trace elements or pollution of heavy metals; hence, the impact of O3 on rice food quality and safety requires a comprehensive evaluation.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Grain (agricultural product) Controlled terms:Agricultural robots - Air pollution - Chemical contamination - Crops - Ecosystems - Food safety - Heavy metals - Minerals - Ozone - Pollution control - Quality control - Trace elements Uncontrolled terms:Agricultural ecosystems - Chlorophyll contents - Comprehensive evaluation - Environmental issues - Food quality and safeties - Metallic elements - Open top chambers - Pollution of heavy metals Classification code:451 Air Pollution - 454.3 Ecology and Ecosystems - 482.2 Minerals - 531 Metallurgy and Metallography - 804 Chemical Products Generally - 821.4 Agricultural Products - 822.3 Food Products - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 2.86e+01%, Percentage 3.60e+00% to 1.98e+01%, Percentage 3.90e+00% to 3.60e+01%, Percentage 4.55e+01% DOI:10.13227/j.hjkx.201912268 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008926 Title:Analysis of the Effect of Temperature on the Microbial Flora Structure During the Nitrite Oxidation Process Using 16S rRNA High-throughput Sequencing Title of translation:高温冲击对亚硝酸盐氧化过程中微生物菌群结构影响 Authors:Hou, Xiao-Wei (1); Niu, Yong-Jian (2); Li, Wei-Wei (2); Wang, Guang-Jie (3); Sun, Hong-Wei (1, 4) Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) Gansu Province Light Industry Research Institute, Lanzhou; 730030, China; (3) Shandong Tongji Testing Technology Co., Ltd., Yantai; 264000, China; (4) School of Environment and Material Engineering, Yantai University, Yantai; 264005, China Corresponding author:Sun, Hong-Wei(12821306@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3773-3780 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to further understand the influence of high temperature shock on the microbial community structure of activated sludge during the process of nitrite oxidation, the enriched nitrifying activated sludge under different NO2^--N concentration was taken as the research object in this study. 16S rRNA high-throughput sequencing technology was used to analyze the changes in the microbial community abundance and structural characteristics of activated sludge by changing the environmental temperature. The results of high-throughput sequencing showed that microorganisms were more likely to grow at 25℃, and the diversity of the microbial community in the activated sludge was the most abundant. With increased temperature, the richness, evenness, and diversity of the flora in the system decreased. In addition, it was found that the main nitrifying bacterium in the system was Nitrospira of Nitrospirae, whereby 35℃ was more suitable for its growth. Meanwhile, a higher temperature also caused differences in the structure of non-nitrifying functional microorganisms (e. g., Bacteroidetes, Chlorofulexi, Halomonas, and Pseudomonas) in the activated sludge. The results of this study provide some theoretical reference for the investigation of the distribution characteristics of microbial flora during the process of nitrite oxidation under high temperature shock, and can also be used as reference for relevant high temperature shock tests.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Activated sludge process Controlled terms:Bacteria - Environmental technology - Nitrification - Oxidation - RNA Uncontrolled terms:Distribution characteristics - Environmental temperature - High-throughput sequencing - Increased temperature - Microbial communities - Microbial community structures - Nitrifying activated sludges - Structural characteristics Classification code:452.2 Sewage Treatment - 454 Environmental Engineering - 461.2 Biological Materials and Tissue Engineering - 802.2 Chemical Reactions DOI:10.13227/j.hjkx.201910220 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008871 Title:Short Term Effects of a Changing Carbon Input on the Soil Respiration of Picea schrenkiana Forests in the Tianshan Mountains, Xinjiang Title of translation:改变碳输入对新疆天山雪岭云杉林土壤呼吸的短期影响 Authors:Shao, Kang (1, 2); Gong, Lu (1, 2); He, Xue-Min (1, 2); Chen, Wen-Jing (1, 2); Zhang, Xue-Ni (1, 2); Zhu, Hai-Qiang (1, 2) Author affiliation:(1) College of Resources and Environmental Sciences, Xinjiang University, Urumqi; 830046, China; (2) Key Laboratory of Oasis Ecological Ministry of Education, Urumqi; 830046, China Corresponding author:Gong, Lu(gonglu721@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3804-3810 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The impact of exogenous carbon input changes on forest soil respiration provides the basis for an intensive analysis of the forest carbon cycle. Based on a plant residue addition and removal control experiment, this study investigated the short-term soil respiration response to carbon input changes of Picea schrenkiana on the Tianshan Mountains during their growing season with five different carbon input treatments: control, double litter, no root, no litter, and no input. The results revealed that, during the entire observation period, the cumulative soil respiration rates were 3.38, 3.94, 2.65, 2.87, and 2.01 μmol•(m²•s)^-1 in the double litter, control, no litter, no root, and no input treatments, respectively. Compared with the control treatment, the cumulative soil CO2efflux increased by 402.65 g•m^-2 in the double litter treatment, whereas it decreased by 515.00, 354.73, and 967.15 g•m^-2in the no litter, no root, and no input treatments, respectively. The mineral soil respiration, litterfall respiration, and root respiration contributed 59.46%, 21.49%, and 14.79%, respectively, to the total soil respiration rate. PCA analysis revealed that the soil respiration rate was positively correlated with the soil temperature, soil moisture, soil total phosphorus content, pH, and soil organic carbon content, and negatively correlated with the soil bulk density, while the soil total nitrogen content, carbon nitrogen ratio, and soil electrical conductivity had no effect on the soil respiration rate.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Forestry Controlled terms:Nitrogen - Organic carbon - Soil moisture Uncontrolled terms:Carbon-nitrogen ratio - Control experiments - Observation Period - Short-term effects - Soil electrical conductivity - Soil organic carbon content - Soil respiration rates - Soil total nitrogen Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.48e+01%, Percentage 2.15e+01%, Percentage 5.95e+01% DOI:10.13227/j.hjkx.202001091 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106141 Title:Chemical Evolution and Formation Mechanism of Groundwater in Hetao Irrigation Area Title of translation:河套灌区地下水化学演变特征及形成机制 Authors:Cui, Jia-Qi (1); Li, Xian-Yue (1); Shi, Hai-Bin (1); Sun, Ya-Nan (1); An, Hai-Jun (2); Xing, Jin-Ping (2) Author affiliation:(1) College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot; 010018, China; (2) Administration of Yongji Irrigation Area of Hetao Irrigation District, Bayannur; 015000, China Corresponding author:Li, Xian-Yue(lixianyue80@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4011-4020 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Groundwater resources are important sources of water in the arid region of northwestern China, but their overexploitation and utilization has led to a series of ecological and environmental problems. Exploring the characteristics and mechanism of groundwater chemical evolution is important for the rational use of groundwater resources. The characteristics of groundwater chemical evolution were studied in the Yongji Irrigation Area of Hetao Irrigation District and the formation mechanism of the chemical compounds in groundwater were investigated using cluster analysis, factor analysis, and other statistical methods. The influence degree of different factors was calculated. The results showed that the major cations in groundwater in the study area were Na⁺ and K⁺, and the major anions were Cl^- and HCO3^-. Moreover, Na⁺, K⁺, and Cl^- showed high spatial variability and were the main factors contributing to groundwater salinization. The major chemical compounds in the groundwater in the study area were Cl-Na, HCO3•Cl•SO4-Na, and HCO3-Na. Based on the cluster analysis results, the groundwater was divided into four categories (A1, A2, B1, and B2), of which A1 was highly mineralized by Cl-Na type water, while A2, B1, and B2 were mainly HCO3•Cl•SO4-Na and HCO3-Na type water. Principal component analysis results suggest that groundwater chemistry was mainly affected by salinization, carbonate karstification, and human activities with the influence degrees of 45.976%, 23.853% and 16.678%, respectively. Evaporation, salt rock dissolution, and cation exchange were important sources of Na⁺ and Cl^- accumulation in the irrigation area. Agricultural irrigation (leaching of soil salts) and drought (intense transpiration) were the key drivers of groundwater salinization in the irrigation area.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Hydrochemistry Controlled terms:Agricultural robots - Chemical analysis - Chlorine compounds - Cluster analysis - Groundwater - Groundwater resources - Ion exchange - Irrigation - Positive ions - Sodium compounds Uncontrolled terms:Agricultural irrigation - Characteristics and mechanisms - Environmental problems - Formation mechanism - Groundwater chemistry - Groundwater salinizations - Hetao irrigation districts - Spatial variability Classification code:444.2 Groundwater - 481.2 Geochemistry - 723 Computer Software, Data Handling and Applications - 802.2 Chemical Reactions - 821.3 Agricultural Methods Numerical data indexing:Percentage 1.67e+01%, Percentage 2.39e+01%, Percentage 4.60e+01% DOI:10.13227/j.hjkx.202003150 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658128 Title:Comparison of Three Receptor Models for Source Apportionment of PM2.5 in Shanghai: Using Hourly Resolved PM2.5 Chemical Composition Data Title of translation:上海大气PM2.5来源解析对比:基于在线数据运用3种受体模型 Authors:Zhou, Min (1, 2) Author affiliation:(1) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (2) State Environmental Protection Key Laboratory of the Cause and Prevention of Urban Air Pollution Complex, Shanghai; 200233, China Corresponding author:Zhou, Min(zhoum@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:1997-2005 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Continuous measurements of PM2.5 and its chemical composition, including inorganic ions, carbon components, and inorganic elements, were conducted in the urban area of Shanghai from November 2 to 24, 2014. The chemical characteristics and sources of PM2.5 were discussed. The average mass concentration of PM2.5 was (64±33) μg•m^-3 (ranging from 12 to 181 μg•m^-3). Organic matter contributed the most to the PM2.5 chemical components, accounting for about 28.1% of total PM2.5, followed by NO3^-, SO4^2-, and NH4⁺, which accounted for 17.4%, 12.4%, and 10.7%, respectively. Meanwhile, three receptor models, including positive matrix factorization (PMF), chemical mass balance (CMB), and multilinear engine 2 (ME2), were applied to apportion the PM2.5 sources based on these online data. The results showed that eight sources were identified, including secondary nitrate, secondary sulfate, secondary organic carbon, heavy fuel oil burning, industry, mobile vehicle exhaust, dust, and power plants. The secondary sources (44.9%-64.8%), including secondary nitrate, secondary sulfate, and secondary organic carbon, were found to be the important contributors to PM2.5. The other two main sources were mobile vehicle exhaust (16.8%-24.8%) and power plants (5.6%-14.9%), whereas other sources were slightly lower contributors. To better verify the accuracy of the PMF, CMB, and ME2 models, the profiles, temporal patterns, and concentrations of different sources obtained by the three models were discussed. Similar source profiles and contributions of secondary nitrate, secondary sulfate, secondary organic carbon, and mobile vehicle exhaust were derived from the PMF, CMB, and ME2, indicating that the results of the three models were reasonable. The ME2 and PMF models simulate better results for power plants and dust sources than CMB, whereas CMB obtained better results for industrial sources.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Mobile power plants Controlled terms:Dust - Factorization - Nitrates - Organic carbon - Petroleum industry - Sulfur compounds - Vehicles Uncontrolled terms:Chemical characteristic - Chemical composition data - Chemical compositions - Chemical mass balance - Continuous measurements - Positive Matrix Factorization - Secondary organic carbon - Source apportionment Classification code:451.1 Air Pollution Sources - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.07e+01%, Percentage 1.24e+01%, Percentage 1.68e+01% to 2.48e+01%, Percentage 1.74e+01%, Percentage 2.81e+01%, Percentage 4.49e+01% to 6.48e+01%, Percentage 5.60e+00% to 1.49e+01% DOI:10.13227/j.hjkx.201909170 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990455 Title:Emission Status and Standards of Volatile Organic Compounds from Chinese and Foreign Bulk Petroleum Terminals Title of translation:国内外储油库VOCs排放现状与标准分析 Authors:Hu, Wei (1); Ren, Bi-Qi (1); Huang, Yu-Hu (1, 2); Qin, Jian-Ping (1); Bian, Ji-Wei (3); Wu, Qing-Zhu (4) Author affiliation:(1) Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Control Technology and Applications, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) School of Environmental Science and Engineering, Tianjin University, Tianjin; 300072, China; (3) Shanghai Environmental Monitoring Centre, Shanghai; 200030, China; (4) Guangzhou Environmental Monitoring Center, Guangzhou; 510030, China Corresponding author:Huang, Yu-Hu(huangyuhu@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:139-145 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Chinese emission standard of air pollutants for bulk gasoline terminals (GB 20950-2007) stipulate standards for vapor emissions during gasoline storage and receiving in bulk gasoline terminals. However, the standards are not applicable to crude oil, aviation kerosene, naphtha, and other kinds of oil. We assess emission standards or directives for vapor processing equipment in terminals in the United States (US) and European Union (EU), and analyze the emission status of vapor processing equipment in three typical cities in China. We further propose revisions to GB 20950-2007. We made the following observations. ① US and EU standards include scope not only for gasoline, but also crude oil and other organic liquids. ② The emission limits of non-methane hydrocarbons defined in GB 20950-2007 are i) 0.5, 1.8, and 8.9 times those defined in Subpart XX, Subpart R, and Subpart Y in the US federal regulations, ii) 1.8 and 3.1 times those defined in Rule 462 and Rule 1142 in southern California law, and iii) 0.7 and 500 times those defined in EU and German directives, respectively. The vapor leakage limit for general areas of China is 0.5 times that defined in Subpart XX of the US standards, whereas the limits for some other specific areas of China, are 0.7 and 2.0 times those defined by Rule 462 and Rule 1142 in southern California law. ③ The numerical range of P5th-P95th of NMHC emissions from the inlet and outlet of vapor processing equipment in three typical cities of China were 115-811 g•m^-3 and 0.1-20.0 g•m^-3, respectively. The proportion of NMHC emission concentrations less than or equal to 10 g•m^-3 at the outlet of vapor processing equipment was>85%. We suggest that the scope of application of GB 20950-2007 should be extended to crude oil, gasoline (including ethanol gasoline), aviation kerosene, and naphtha. The emission concentration limit of NMHC from vapor processing equipment should be tighten from 25 g•m^-3 to 20 g•m^-3, with a emission limit of 10 g•m^-3 added for particular cases.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Gasoline Controlled terms:Crude oil - Jet fuel - Laws and legislation - Naphthas - Volatile organic compounds Uncontrolled terms:Emission concentration - Emission standard - Federal regulations - Non-methane hydrocarbons - Numerical range - Processing equipment - Scope of application - Southern California Classification code:512.1 Petroleum Deposits - 523 Liquid Fuels - 804.1 Organic Compounds - 971 Social Sciences DOI:10.13227/j.hjkx.201906170 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658083 Title:Effect of Organic Matter Promotion on Nitrogen-Cycling Genes and Functional Microorganisms in Acidic Red Soils Title of translation:有机质提升对酸性红壤氮循环功能基因及功能微生物的影响 Authors:Chu, Cheng (1); Wu, Zhao-Yue (1); Huang, Qian-Ru (2); Han, Cheng (1, 3); Zhong, Wen-Hui (1, 3) Author affiliation:(1) Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Geography Sciences, Nanjing Normal University, Nanjing; 210023, China; (2) Jiangxi Institute of Red Soil, Nanchang; 331717, China; (3) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing; 210023, China Corresponding author:Zhong, Wen-Hui(zhongwenhui@njnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2468-2475 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The application of exogenous organic matter is considered the main method of increasing the organic matter content of acidic red soils. Nitrogen is an important limiting factor for soil fertility. Changes to the soil ecosystem under organic matter promotion can affect soil nitrogen cycling and related functional microorganisms; however, there have been no studies on this aspect. Acidic upland red soils, with or without long-term organic fertilizer application, were chosen as the research materials in this study. Based on metagenomic sequencing and alignment in the nitrogen-cycling gene database, the present study aimed to investigate the effect of organic matter promotion on nitrogen-cycling genes and functional microorganisms in acidic red soils, which had been amended with exogenous organic matter for 32 years. The results showed that organic matter promotion in acidic soils increased the total organic carbon and total nitrogen content, and alleviated soil acidification. Organic matter promotion increased the soil net nitrification activity and potential for ammoxidation. Organic matter promotion increased the abundance of amoA genes (encoding ammonia monooxygenase) and nar, nap, nir, nor, and nos genes (encoding denitrification reductase); decreased the abundance of hao genes (encoding hydroxylamine oxidase) and nrf genes related to the dissimilatory nitrate reduction to ammonia; increased the abundance of glnA, gdh, glsA, ansB, and nao genes related to organic nitrogen metabolism; altered the abundance of functional genes related to assimilatory nitrate reduction; and changed the community composition of nitrogen-cycling microorganisms. After organic matter promotion, alleviation of soil acidification and enhancement of total organic carbon were the most important factors that affected the abundance of nitrogen-cycling genes and the community composition of functional microorganisms. Our results comprehensively investigated the inorganic and organic nitrogen-cycling genes, and correlated the functional genes, microbial populations, and functional activities in the ammonia oxidizing process, which provided supporting data to understand the nitrogen-cycling characteristics of acidic red soils and provided ideas for acidic soil improvement.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Soils Controlled terms:Acidification - Amines - Ammonia - Biogeochemistry - Encoding (symbols) - Fertilizers - Forestry - Genes - Microorganisms - Nitrates - Nitrogen - Organic carbon - Population statistics - Signal encoding Uncontrolled terms:Ammonia monooxygenase - Community composition - Dissimilatory nitrate reduction - Functional activities - Microbial populations - Nitrification activity - Organic matter content - Total nitrogen content Classification code:461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 804 Chemical Products Generally - 822.2 Food Processing Operations Numerical data indexing:Age 3.20e+01yr DOI:10.13227/j.hjkx.201911013 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278144 Title:Chemical Compositions and Sources of n-Alkanes and Saccharides in PM2.5 from Taian City During the Summer Title of translation:泰安市夏季PM2.5中正构烷烃和糖类化合物的化学组成及其来源 Authors:Yi, Ya-Nan (1); Hou, Zhan-Fang (1, 2); Yang, Qian-Cai (3); Liu, Xiao-Di (1); Li, Zheng (1); Meng, Jing-Jing (1, 2); Yan, Li (4); Wei, Ben-Jie (1); Fu, Meng-Xuan (1) Author affiliation:(1) School of Environment and Planning, Liaocheng University, Liaocheng; 252000, China; (2) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China; (3) Liaocheng Environmental Monitoring Center, Liaocheng; 252000, China; (4) Chinese Academy for Environmental Planing, Beijing; 100012, China Corresponding author:Hou, Zhan-Fang(houzhanfang@lcu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1045-1055 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the variations and sources of n-alkanes and sugars in Taian City during summer, PM2.5samples were collected from July 22 to August 19, 2016. The identified n-alkane and sugar sources were investigated using a principal component analysis (PCA) multiple linear regression (MLR) model and a backward trajectory model. The results showed that the mass concentrations of PM2.5 during summer were (37.2±11.5) μg•m^-3. The mass concentrations of n-alkanes were (83.3±34.7) ng•m^-3, the carbon preference index (CPI) was 1.83, and the relative contribution of wax n-alkanes was 34.7%-69.4%, suggesting that contributions from terrestrial plants were more significant in Taian City. The results showed that the mass concentrations of sugars in Taian City during summer were (73.4±46.6) ng•m^-3. Levoglucan, galactosan, and mannosan were the main saccharides, accounting for 64.0%, 7.1%, and 6.3% of the total concentrations of sugars, respectively, indicating that biomass burning is much more significant in Taian City. The results of the PCA-MLR model suggested that n-alkanes and sugars in Taian City during summer were mostly from terrestrial plants, coal burning and biomass burning. The backward trajectory model showed that the pollution mostly came from the native sources of Shandong province and the inland cities in the south.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Paraffins Controlled terms:Elementary particle sources - Hydrocarbons - Linear regression - Sugars Uncontrolled terms:Backward trajectory - Chemical compositions - Multiple linear regression models - n-Alkanes - PM2.5 - Relative contribution - Saccharides - Taian City Classification code:804.1 Organic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Percentage 3.47e+01% to 6.94e+01%, Percentage 6.30e+00%, Percentage 6.40e+01%, Percentage 7.10e+00% DOI:10.13227/j.hjkx.201907070 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861962 Title:Distribution Characteristics and Source Analysis of Atmospheric Mercury Speciation in Suzhou Title of translation:苏州市大气中汞的形态分布特征及来源分析 Authors:Lu, Ren-Jie (1); Wu, Ye-Zheng (1, 2); Zhang, Xiao-Jie (3); Shen, Ying (1); Wu, Fu-Quan (1, 2); Xue, Yuan-Yuan (1); Zou, Qiang (1, 2); Ma, Chun-Yan (4) Author affiliation:(1) Jiangsu Suzhou Environmental Monitoring Center, Suzhou; 215000, China; (2) Key Laboratory of Atmospheric Combined Pollution Monitoring, Environmental Protection Department of Jiangsu Province, Suzhou; 215000, China; (3) Suzhou Changwei Environmental Protection Technology Co., Ltd., Suzhou; 215000, China; (4) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China Corresponding author:Ma, Chun-Yan(cyma@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3102-3111 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the variation of mercury in the atmosphere in Suzhou, continuous monitoring of gaseous element mercury (GEM), gaseous oxidized mercury (GOM), and particulate bound mercury (PBM) was conducted from January 1 to December 31, 2018, in Suzhou. The weights trajectory analysis method (CWT) and concentration rose were used to analyze the atmospheric mercury sources and concentration variation. The results showed that during the monitoring period, the concentration ranges of GEM, GOM, and PBM in Suzhou were 0-53.3 ng•m^-3, 0-256 pg•m^-3, and 0-5 208 pg•m^-3, respectively. The corresponding annual average concentrations of the three mercury species were (2.57±2.09) ng•m^-3, (5.27±15.7) pg•m^-3, and (16.0±157) pg•m^-3, respectively. GEM was the main component of atmospheric mercury in Suzhou. During the monitoring period, the average concentration of GEM in Suzhou was highest in winter, higher in spring than in autumn, and lowest in summer. According to the CWT, the mercury-containing air mass in spring and winter predominantly originated from inland; in summer, it mainly originated from the local area, the Yellow Sea, and the East China Sea, and in autumn from inland, the Yellow Sea, and the Bohai Sea. The wind and mercury rose charts showed that atmospheric mercury concentrations were higher from inland and lower from the ocean. During the monitoring period, the average concentrations of GEM and PBM in Suzhou were lower during the day than the night. The diurnal variation of GEM and PBM was significantly and strongly correlated with solar radiation, humidity, and air temperature. The average concentration of GOM showed multiple peaks and valleys in one day. Some peaks were caused by fuel oil combustion emissions, and some by O3 oxidation with GEM.
© 2020, Science Press. All right reserved. Number of references:57 Main heading:Atmospheric humidity Controlled terms:Springs (components) Uncontrolled terms:Annual average concentration - Average concentration - Concentration ranges - Concentration variation - Continuous monitoring - Distribution characteristics - Gaseous oxidized mercuries - Particulate bound mercury Classification code:443.1 Atmospheric Properties - 601.2 Machine Components DOI:10.13227/j.hjkx.201910076 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256395 Title:Mobile Source Emission Inventory with High Spatiotemporal Resolution in Tianjin in 2017 Title of translation:天津市2017年移动源高时空分辨率排放清单 Authors:Liu, Geng (1); Sun, Shi-Da (1); Sun, Lu-Na (1); Jin, Jia-Xin (1); Fang, Jian-Xu (1); Song, Peng-Fei (1); Wang, Ting (1); Wu, Lin (1); Mao, Hong-Jun (1) Author affiliation:(1) Tianjin Key Laboratory of Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin; 300071, China Corresponding author:Mao, Hong-Jun(hongjun_mao@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4470-4481 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Mobile source emissions have become a major contributor to air pollution in urban areas. Most of the previous studies focus on the emissions from a single source such as on-road mobile source (vehicles) or non-road mobile source (construction machinery, agricultural machinery, ships, railway diesel locomotives, aircraft), but few studies investigate the mobile source emissions as a whole. In this study, we introduced a method for developing mobile source emission inventory with high spatiotemporal resolution, and applied this method in Tianjin in 2017 to analyze the emission compositions and spatiotemporal characteristics there. The results showed that the CO, VOCs, NOx, and PM10 emissions from the mobile sources were 183.03, 64.18, 149.85, and 8.36 thousand tons, respectively. The on-road mobile source was the main contributor to CO and VOCs emissions, accounting for 85.38% and 86.60%, respectively. The non-road mobile source was the main contributor to NOx and PM10 emissions, accounting for 57.32% and 66.95%, respectively. According to the temporal distributions, the mobile source emissions were lowest in February for all pollutants. Moreover, they were highest in October for CO and VOCs and in August for NOx and PM10. Holidays (such as Spring Festival and National Day) have a significant impact on the temporal distribution of the mobile source emissions. According to the spatial distributions, the CO and VOCs emissions were concentrated in urban areas and roads with heavy traffic flow (highways and national highways), and the NOx and PM10 were concentrated in urban areas and port areas. The spatial distributions of different pollutants were determined by the location of their major contributors. This study can provide the required data for fine air pollution control and air quality simulation in Tianjin. Moreover, this method can be applied to the other areas where a mobile source emission inventory needs to be developed.
© 2020, Science Press. All right reserved. Number of references:53 Main heading:Air pollution control Controlled terms:Agricultural robots - Air quality - Construction equipment - Engines - Nitrogen oxides - Particulate emissions - Roads and streets - Spatial distribution Uncontrolled terms:Air quality simulation - Construction machinery - Mobile source emission inventory - Mobile source emissions - On-road mobile sources - Spatio-temporal resolution - Spatiotemporal characteristics - Temporal distribution Classification code:405.1 Construction Equipment - 406.2 Roads and Streets - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 804.2 Inorganic Compounds - 921 Mathematics Numerical data indexing:Percentage 5.73e+01%, Percentage 6.70e+01%, Percentage 8.54e+01%, Percentage 8.66e+01% DOI:10.13227/j.hjkx.202003215 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256495 Title:Characteristics of Soil Nutrients and Fungal Community Composition in Crop Rhizosphere Under Different Rotation Patterns Title of translation:不同轮作模式下作物根际土壤养分及真菌群落组成特征 Authors:Sun, Qian (1); Wu, Hong-Liang (1); Chen, Fu (2); Kang, Jian-Hong (1) Author affiliation:(1) School of Agriculture, Ningxia University, Yinchuan; 750021, China; (2) Key Laboratory of Farming System of Ministry of Agriculture, College of Agriculture, China Agricultural University, Beijing; 100193, China Corresponding author:Wu, Hong-Liang(nxuwu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4682-4689 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the characteristics of soil nutrients and fungal community composition under different rotation patterns in the arid zone of central Ningxia, we used millet rotation soybean (MRG), rotation grain amaranth (MRA), rotation quinoa (MRQ), and continuous millet rotation (CK) as the objects. The soil nutrient content was determined, and the sequence of the ITS variation region of soil fungi was determined using the Illumina MiSeq high-throughput sequencing platform. The results showed that the effects of different rotation patterns on the soil nutrients were different. The soil pH and electrical conductivity decreased under three rotation patterns, and the soil total nitrogen, total potassium, total phosphorus, and organic matter contents increased. The number of OTUs and α diversity index was higher than those of continuous millet rotation. The results of the fungal community composition study showed that Ascomycota was the dominant flora in 4 patterns. The cluster analysis showed that the fungal genus composition of MRA and MRG was the most similar, followed by MRQ, and that of CK was significantly different with the other three rotation patterns. A correlation analysis showed that the soil nutrients were significantly correlated with several dominant fungal genera (P<0.05 or P<0.01). Further, the soil total nitrogen, total potassium, nitrate nitrogen, and organic matter contents were the most important factors influencing the soil fungal communities. Principal component analysis (PCA) showed that the MRG rotation patterns were better than those of the MRA and MRQ patterns. In summary, crop rotation improved the polytrophic index of the fungal community, changed the soil fungal community structure, and improved soil fertility. Among, the millet and soybean rotation were the best, and we have suggested to promote cereal rotation as one of the main rotation patterns in the cereal industry in the central dry zone.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Fungi Controlled terms:Arid regions - Biogeochemistry - Cluster analysis - Crops - Forestry - Nutrients - Organic compounds - Potassium Nitrate - Rotation - Soils Uncontrolled terms:Correlation analysis - Electrical conductivity - Fungal community compositions - High-throughput sequencing - Nitrate nitrogen - Organic matter content - Soil fungal communities - Soil total nitrogen Classification code:443 Meteorology - 444 Water Resources - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 723 Computer Software, Data Handling and Applications - 804.1 Organic Compounds - 821.4 Agricultural Products - 931.1 Mechanics DOI:10.13227/j.hjkx.202001031 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256537 Title:Assessment of Potential Risk of Diffuse Pollution in Haihe River Basin Based Using DPeRS Model Title of translation:基于DPeRS模型的海河流域面源污染潜在风险评估 Authors:Feng, Ai-Ping (1); Wang, Xue-Lei (1); Xu, Yi (1); Huang, Li (1); Wu, Chuan-Qing (1); Wang, Chang-Zuo (1); Wang, Hong-Liang (2) Author affiliation:(1) Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, Beijing; 100094, China; (2) Beijing AutoAi Technology Co., Ltd., Beijing; 100094, China Corresponding author:Wang, Xue-Lei(wxlbnu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4555-4563 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Considering the Haihe River Basin as an example, the DPeRS model was used to analyze the spatial distribution characteristics and pollution sources of the diffuse pollution by remote sensing pixel scale. Combined with the evaluation standard of surface water quality, a potential risk grading method for diffuse pollution was constructed to assess the potential risk of diffuse pollution in Haihe River Basin. The results showed that, in 2016, the diffuse discharge loads of total nitrogen (TN), total phosphorus (TP), ammonia nitrogen (NH4⁺-N), and chemical oxygen demand (COD) were 429.2, 25.7, 288.3, and 1 017.0 kg•km^-2, respectively, with the amount of river entry being 2.5×10⁴ ton, 1 597.2 ton, 1.7×10⁴ ton, and 6.6×10⁴ ton in Haihe River Basin, respectively. Farmland runoff is the most important source of diffuse pollution of TN, TP and NH4⁺-N in the Haihe River Basin. For COD index, urban life is the primary type of pollution, followed by livestock. The diffuse pollution is relatively severe in the central and southern areas of Haihe River Basin, and this area is also a high-risk concentrated distribution area of diffuse pollution in the basin. The distribution of high-risk areas of nitrogen-phosphorus diffuse pollution are relatively concentrated, and the chemical oxygen demand is relatively scattered. More than 36% of the Haihe River Basin has a nitrogen-phosphorus diffuse pollution risk, and 2.94% of the area has a chemical oxygen demand diffuse pollution risk.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:River pollution Controlled terms:Agriculture - Ammonia - Chemical oxygen demand - Grading - Nitrogen - Oxygen - Phosphorus - Remote sensing - Risk assessment - Rivers - Water pollution control - Water quality - Watersheds Uncontrolled terms:Diffuse pollution - Distribution area - Distribution characteristics - Evaluation standard - Haihe River basin - Nitrogen phosphorus - Pollution sources - Total phosphorus Classification code:444.1 Surface Water - 445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass 5.42e+05kg, Percentage 2.94e+00%, Percentage 3.60e+01% DOI:10.13227/j.hjkx.201912077 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990467 Title:Analysis of Pollution Characteristics and Sources of PM2.5 During Heavy Pollution in Shijiazhuang City Around New Year's Day 2019 Title of translation:2019年元旦前后石家庄市重污染过程PM2.5污染特征及来源解析 Authors:Zhou, Jing-Bo (1); Duan, Jing-Chun (2, 3); Wang, Jian-Guo (1); Yang, Peng (4); Liu, Huan-Wu (5); Li, Mei (6); Jin, Wei (1) Author affiliation:(1) Shijiazhuang Environmental Monitoring Station of Hebei Province, Shijiazhuang; 050022, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) National Joint Research Center for Tackling Key Problems in Air Pollution Control, Beijing; 100012, China; (4) Shijiazhuang Meteorological Bureau, Shijiazhuang; 050081, China; (5) Xi'an Environmental Monitoring Station, Xi'an; 710119, China; (6) Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou; 510632, China Corresponding author:Jin, Wei(jiwei65815@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:39-49 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We report on successive haze weather that occurred in Shijiazhuang City, China, from December 30, 2018 to January 15, 2019. There were 12 days of heavy atmospheric pollution during this period, which primarily involved aerosol fine particulate matter (PM2.5). This study analyzes the causes of the pollution using component analysis and by assessing pollution evolution, spatial and temporal distributions of PM2.5, pollution sources, and meteorological factors. The results showed that PM2.5 was mainly composed of secondary inorganic ions (65.4%) that were mainly sourced from coal combustion (24.4%) and industrial sources (23.7%). The contributions of sulfate and secondary inorganic sources increased significantly with increasing pollution. Pollution was affected by unfavorable meteorological conditions (e.g., a low air mass) and by the particular local terrain, static stability, high humidity, and near-ground reverse temperatures from the south-southeast and west-southwest directions. Contaminants from primary sources including coal combustion, industry, and motor vehicle exhausts accumulated quickly in front of the Taihang Mountains. Secondary transformation of gaseous pollutants and increasing moisture absorption of particulate matter increased PM2.5 concentrations. Sulfate explosion also increased pollution. We recommend that as part of emergency responses to heavy pollution events, emissions reduction measures should be implemented to strengthen the control of SO2, NOx, and NH3 emission sources of secondary inorganic precursors, especially SO2 emission sources (i.e., coal etc.). We further propose a strengthen of the management of atmospheric emission sources in Xinle, Wuji, Shenze, Jinzhou, and Xingtang counties in the northeast of the city to reduce the impact of local transmission.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Particles (particulate matter) Controlled terms:Air pollution - Ammonia - Atmospheric humidity - Coal - Coal combustion - Coal industry - Emission control - Fog - Sulfur compounds Uncontrolled terms:Atmospheric emission - Atmospheric pollution - Fine particulate matter (PM2.5) - Inorganic precursor - Meteorological condition - Meteorological factors - Secondary transformation - Spatial and temporal distribution Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 451.2 Air Pollution Control - 524 Solid Fuels - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Age 3.29e-02yr, Percentage 2.37e+01%, Percentage 2.44e+01%, Percentage 6.54e+01% DOI:10.13227/j.hjkx.201906085 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517599 Title:Effect of Biomass Particle Size on the Adsorption of Phosphorus from Aqueous Solution by MgO-loaded Biochar Title of translation:生物质粒径对负载MgO生物炭吸附水体中磷的影响 Authors:Wang, Peng-Fei (1); Zhi, Meng-Meng (2); Chu, Zhao-Sheng (1); Cui, Guan-Nan (3) Author affiliation:(1) National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Environment Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) School of Light Industry, Beijing Technology and Business University, Beijing; 100048, China Corresponding author:Chu, Zhao-Sheng(chuzs@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5480-5487 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the effect of biomass particle size on the rate and ability of phosphorus removal from aqueous solution by MgO-loaded Phragmites australis biochar (MBC), MBC was prepared using 0.0-0.5, 1.0-2.0, and 6.0-8.0 mm Phragmites australis particles as the feedstock and MgCl2 as the modification material. The MBC was characterized using FTIR, XRD, and SEM techniques. Kinetic and isotherm experiments of phosphate (PO4^3--P) adsorption from aqueous solution by the MBC were conducted, and the experimental data were fitted with various kinetic and isotherm models. The results showed that the adsorption rate of PO4^3--P by the MBC increased with the increase in biomass particle size. The amount of PO4^3--P adsorbed by the MBC prepared from 0.0-0.5, 1.0-2.0, and 6.0-8.0 mm particles reached 15.4%, 25.8%, and 80.8%, respectively, within 2 h. The biomass particle size did not affect the maximum PO4^3--P adsorption capacity (249.0-254.7 mg•g^-1) of the MBC. MBC prepared from the 6-8 mm particles retained the complete cell wall structure of the Phragmites australis, and a large number of micropores and mesopores were generated during pyrolysis, thereby forming a hierarchical, regular, and well-connected pore structure. MBC prepared from the 0.0-0.5 mm and 1.0-2.0 mm particles had inferior pore structures with inferior pore connectivity, which affected the diffusion rate of PO4^3- ions inside the MBC and limited the PO4^3--P adsorption rate. Therefore, when using waste Phragmites australis harvested from a constructed wetland to produce MBC and remove phosphorus from water, the Phragmites australis should be crushed into 6-8 mm particles. Over-crushing deteriorates the pore structure of the produced MBC and reduces the removal rate of phosphorus by the MBC.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Adsorption Controlled terms:Biomass - Chlorine compounds - Isotherms - Magnesia - Oxide minerals - Particle size - Phosphorus - Pore structure - Wetlands Uncontrolled terms:Adsorption capacities - Adsorption rates - Biomass Particle - Cell wall structure - Constructed wetlands - Phosphorus removal - Phragmites australis - Pore connectivity Classification code:482.2 Minerals - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Percentage 1.54e+01%, Percentage 2.58e+01%, Percentage 8.08e+01%, Size 0.00e+00m to 5.00e-04m, Size 1.00e-03m to 2.00e-03m, Size 6.00e-03m to 8.00e-03m, Time 7.20e+03s DOI:10.13227/j.hjkx.202005063 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517637 Title:Advanced Treatment of Tail Water Using Pilot-scale Horizontal and Vertical Subsurface Flow Constructed Wetlands in Low-temperature Seasons Title of translation:低温季节水平潜流和垂直潜流人工湿地尾水深度处理中试 Authors:Liao, Xue-Ke (1, 2); Yan, Han-Lu (2); Wang, Zhi-Yuan (2); Chen, Cheng (2); He, Dong (3); Wu, Yue-Long (3); Chen, Qiu-Wen (2) Author affiliation:(1) School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Center for Eco-Environmental Research, Nanjing Hydraulic Research Institute, Nanjing; 210029, China; (3) Nanjing R&D Tech Group Co., Ltd., Nanjing; 210029, China Corresponding author:Yan, Han-Lu(hlyan@nhri.cnemailqwchen@nhri.cn)Chen, Qiu-Wen(qwchen@nhri.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5509-5517 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:There were significant differences in the working efficiency and mechanism of constructed wetlands between low temperature and suitable temperature conditions. This study designed a horizontal subsurface flow constructed wetland (HFCW) and a vertical subsurface flow constructed wetland (VFCW) to explore their performance differences in advanced treatment of sewage based on contaminant degradation analysis including the removal of organic matters, total nitrogen (TN), and total phosphorus (TP), as well as the analysis of microbial community structure. The results showed that when the COD concentration of influent was between 37.50 to 80.00 mg•L^-1, the concentration of total nitrogen and total phosphorus were within the first level A criteria specified in the discharge standard of pollutants for municipal wastewater treatment plant at the continuous flow of 2 m³•d^-1: ①Both HFCW and VFCW showed stable degradation ability of organic matter in influent and good resistance to high organic load. ②Supplementation of the carbon source significantly improved the nitrogen removal efficiency of two subsurface flow constructed wetlands. HFCW achieved the average removal rate of TN at 76.01%, and the average removal rate of TN by VFCW reached 71.69% after the carbon addition. In contrast, dosage of an external carbon source showed limited effect on phosphorus removal. Furthermore, it worked more effectively for performance improvement of HFCW than that of VFCW. ③The analysis of microbial community structure in wetland substrate and plant rhizosphere samples revealed that Proteobacteria, Firmicutes, and Verrucomicrobia were the dominant phylum in two series of wetland samples. For the dominant microbiota at the genus level, there were more significant differences in microbial community structure in wetland substrate samples than that in plant rhizosphere samples. Hydrogenophaga, Erysipelothrix, and Devosia contributed the most to the differences between the microbial communities of HFCW and VFCW. Overall, the species diversity and abundance of microbial samples from VFCW was higher than those from HFCW.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Wetlands Controlled terms:Biogeochemistry - Carbon - Chemicals removal (water treatment) - Efficiency - Horizontal wells - Microorganisms - Nitrogen removal - Organic compounds - Phosphorus - Sewage - Sewage treatment plants - Soils - Temperature - Wastewater treatment Uncontrolled terms:Contaminant degradation - Horizontal subsurface flow constructed wetlands - Microbial community structures - Municipal wastewater treatment plants - Nitrogen removal efficiency - Subsurface flow constructed wetlands - Temperature conditions - Vertical subsurface-flow constructed wetland Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.9 Biology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 512.1.1 Oil Fields - 641.1 Thermodynamics - 804 Chemical Products Generally - 804.1 Organic Compounds - 913.1 Production Engineering Numerical data indexing:Mass_Density 3.75e-02kg/m3 to 8.00e-02kg/m3, Percentage 7.17e+01%, Percentage 7.60e+01% DOI:10.13227/j.hjkx.202005183 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278083 Title:Influence of Antibiotics on the Denitrification Process of Antibiotic Resistant Denitrifying Bacteria and the Analysis of Microbial Community Structure Title of translation:抗生素对耐药型反硝化菌反硝化过程及微生物群落结构的影响 Authors:Dai, Sha (1, 2); Li, Peng (2); Peng, Wu-Qing (2, 3); Liu, Yu-Xue (1, 2); Wang, Zheng (1); He, Yi-Liang (2); Shen, Gen-Xiang (4); Hu, Shuang-Qing (4) Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (3) School of Environmental Science and Engineering, Anhui Normal University, Wuhu; 241000, China; (4) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China Corresponding author:Li, Peng(lipeng2016@sjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1401-1408 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The removal rate of some antibiotics in urban sewage by conventional treatment is low, which leads to an increase in antibiotic resistant bacteria in natural water environments. To reduce the ecological harm of antibiotics to the water in towns, a risk control technique for degradation of microantibiotics by the co-metabolism of antibiotic resistant denitrifying bacteria was proposed. Using sodium acetate as an electron donor and maintaining the concentration of ofloxacin (OFLX) at 1 μg•g^-1, gradually increasing the dominant growth of antibiotic degradation bacteria, denitrifying bacteria (DnB1), trace antibiotics and sodium acetate, and denitrifying bacteria (DnB2) with the presence of sodium acetate and nitrogen elements were cultured. The degradation effect of antibiotics through denitrification and the effects of antibiotics on denitrification of resistant denitrifying bacteria and the changes to the microbial community were investigated. The results showed that DnB2 had a significant degradation effect on OFLX compared to DnB1. The degradation to OFLX by DnB1 and DnB2 was 0.31 μg•g^-1 and 16.14 μg•g^-1, respectively. Increased OFLX concentration inhibited DnB1 denitrification activity in the short term. The denitrification process of DnB2 was less affected by OFLX. At the same time, high-throughput sequencing using the Illumina MiSeq platform was used. Based on the operational taxonomic unit information formed by the clustering of sequencing results, the diversity of each sample was compared and analyzed. The research results show that the relative abundance and diversity of the microbial community of DnB1 are higher than those of DnB2.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Denitrification Controlled terms:Adsorption - Antibiotics - Bacteria - Biodegradation - Degradation - Sewage - Sodium compounds - Trace elements Uncontrolled terms:Antibiotic-resistant bacteria - Conventional treatments - Denitrification process - High-throughput sequencing - Microbial communities - Microbial community structures - Ofloxacin - Operational taxonomic units Classification code:452.1 Sewage - 461.6 Medicine and Pharmacology - 461.8 Biotechnology - 802.2 Chemical Reactions - 802.3 Chemical Operations DOI:10.13227/j.hjkx.201909175 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278114 Title:Effect of Sulfate on the Migration and Transformation of Methylmercury in Advanced Anaerobic Digestion of Sludge Title of translation:硫酸盐对污泥高级厌氧消化过程中甲基汞迁移转化的影响 Authors:He, Xiang-Lin (1, 2); Liu, Ji-Bao (2); Yin, Yong-Guang (2); Tan, Ying-Feng (3); Zhu, Ai-Ling (2); Zuo, Zhuang (3); Gao, Shan (3); Xie, Li-Ping (1); Wei, Yuan-Song (2, 4) Author affiliation:(1) School of Environmental Science and Engineering, Tianjin Polytechnic Universit Tianjin Polytechnic Universityy, Tianjin; 300387, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Beijing Drainage Croup Co., Ltd., Beijing; 100192, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Xie, Li-Ping(xielp991@tjpu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1425-1431 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the migration and transformation of methylmercury during advanced anaerobic digestion of sludge and the role of sulfate, this study investigated the migration and transformation of methylmercury during different stages of sludge anaerobic digestion (AD) with thermal hydrolysis pretreatment and under different dosages of sulfate addition. The results showed that mercury methylation occurred in the initial stage of AD (Day 1-3), the ratio of methylmercury to total mercury increased from 0.024% (range of 0.019%-0.033%) to 0.038% (range of 0.030%-0.048%), and the net increment of methylmercury increased by 3.97, 6.09, 0.17, 3.71, and 1.66 times, respectively. In the following Day 3-5, the demethylation process occurred with the net yield of methylmercury decreased by 71.25% (ranging from 67.42% to 75.10%). Sulfate inhibited the methylation of mercury in the initial stage of AD, but had little effect on it in the late stage. This was related to the reduction of the bioavailability of neutral mercury complexes by charged groups of HgHS2^2- and HgS2^2-, as well as the immobilization of iron sulfide and mercury sulfide on S^2- and bioavailable mercury. Redundancy analysis (RDA) showed that mercury methylation was affected by several factors: organic substances such as propionic acid, isobutyric acid, isovaleric acid, and Fe may promote mercury methylation, whereas protein and higher pH may be inhibitors of mercury methylation in AD of sludge.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Mercury compounds Controlled terms:Alkylation - Anaerobic digestion - Biochemistry - Mercury (metal) - Methylation - Propionic acid - Sludge digestion - Sulfur compounds Uncontrolled terms:Isovaleric acids - Mercury methylation - Methyl mercury - Organic substances - Redundancy analysis (RDA) - Sludge - Sulfate - Thermal hydrolysis pretreatment Classification code:452.2 Sewage Treatment - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Percentage 1.90e-02% to 3.30e-02%, Percentage 2.40e-02%, Percentage 3.00e-02% to 4.80e-02%, Percentage 3.80e-02%, Percentage 6.74e+01% to 7.51e+01%, Percentage 7.12e+01% DOI:10.13227/j.hjkx.201909060 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796173 Title:Effect of Liquid Water Content of Particles and Acidity of Particulate Matter on the Formation of Secondary Inorganic Components in Xinjiang Petrochemical Industrial Area Title of translation:新疆石化工业区颗粒物含水量和酸度对二次无机组分形成的影响 Authors:Liu, Hui-Bin (1); Talifu, Dilinuer (1); Wang, Xin-Ming (2); Zhang, Xiao-Xiao (1); Wang, Wei (1); Abulizi, Abulikemu (1); Maihemuti, Mailikezhati (1); Liu, Wei (3) Author affiliation:(1) College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi; 830046, China; (2) State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China; (3) Dushanzi Environmental Scientific Research and Monitoring Station, Karamay; 833699, China Corresponding author:Talifu, Dilinuer(dilnurt@xju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2536-2546 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Secondary species are dominant components of PM2.5 in Dushanzi, Xinjiang. It is crucial to investigate the conversion process of secondary components in the atmosphere for regional air pollution control. The water-soluble components were analyzed for samples collected from Dushanzi District of Xinjiang from September 2015 to July 2016. The results showed that the total water-soluble ions (TWSIs) showed a seasonal variation consistent with PM2.5, and the seasonal variation of the ions was in the order-winter (67.86 μg•m^-3)>autumn (13.77 μg•m^-3)>spring (10.09 μg•m^-3)>summer (4.85 μg•m^-3); secondary ions (NH4⁺, SO4^2-, and NO3^-)-accounting for 98% of TWSIs in winter. The results of the aerosol thermodynamic model (E-AIM) that explores the particle liquid water and acidity in Dushanzi District showed that the particles in Dushanzi are acidic with an annual in-situ pH of 0.81, and the pH value of the winter samples was the highest (2.93). The seasonal variation of particles in water was of the order: winter (331.32 μg•m^-3)>autumn (5.91 μg•m^-3)>spring (5.46 μg•m^-3)>summer (1.62 μg•m^-3). The annual average nitrogen oxidation rate and sulfur oxidation rate were 0.13 and 0.47, respectively, indicating a secondary conversion of regional pollutants. Further analysis showed that the concentration of sulfate in the particle phase was significantly affected by liquid water content of particles and in-situ pH. The formation of nitrate was mainly caused by heterogeneous reactions under high water content of particle.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Particles (particulate matter) Controlled terms:Air pollution control - Ions - Liquids - Springs (components) - Sulfur compounds Uncontrolled terms:Heterogeneous reactions - Inorganic components - Liquid water content - Regional air pollution - Regional pollutants - Secondary components - Thermodynamic model - Water soluble components Classification code:451.2 Air Pollution Control - 601.2 Machine Components - 951 Materials Science Numerical data indexing:Percentage 9.80e+01% DOI:10.13227/j.hjkx.201910146 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517598 Title:Distribution Characteristics and Pollution Assessment of Nutrients in Hengshui Lake Sediments Title of translation:衡水湖沉积物营养盐形态分布特征及污染评价 Authors:Zhang, Jia-Wen (1, 2); Wei, Jian (2); Liu, Li (1); Wang, Jian (1); Zhu, Yuan-Rong (2); Duan, Liang (2) Author affiliation:(1) College of Environmental Sciences, Liaoning University, Shenyang; 110036, China; (2) Department of Water Environment Treatment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Liu, Li(liul215@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5389-5399 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Considering Hengshui Lake as the research object, the representative surface sediments at eleven points were collected in March 2019, and the morphological distribution characteristics of carbon, nitrogen, and phosphorus nutrients in the lake sediments were analyzed. The results showed that the total organic carbon (TOC) content in Hengshui Lake sediments was 93.226 mg•g^-1, which might lead to a higher risk of potential nitrogen source release. The total nitrogen (TN) content was 1.850 mg•g^-1, which was a moderate pollution load; the contents of various nitrogen forms and the proportions in TN were Res-N (0.973 mg•g^-1, 52.57%)>WAEF-N (0.531 mg•g^-1, 28.69%)>SOEF-N (0.208 mg•g^-1, 11.23%)>IEF-N 0.088 (mg•g^-1, 4.77%)>SAEF-N (0.051 mg•g^-1, 2.75%). These results further indicated that the risk of nitrogen release from sediments in Hengshui Lake was relatively high. The content of total phosphorus (TP) was 1.020 mg•g^-1 and that of inorganic phosphorus (IP) was 0.839 mg•g^-1, accounting for 82.27% of the TP content, which was a moderate pollution load; the average content of various phosphorus forms and the proportions in IP were Ca-P (0.440 mg•g^-1, 52.44%)>Res-P (0.200 mg•g^-1, 23.84%)>Fe-P and Al-P (0.169 mg•g^-1, 20.14%)>NH4Cl-P (0.030 mg•g^-1, 3.58%). In general, the risk of phosphorus release from sediments in Hengshui Lake was relatively low. The analysis of C/N, C/P, and N/P characteristics showed that the organic matter in Hengshui Lake sediments mainly originated from terrestrial grasses and sedge plants, and the phosphorus in the sediments was mainly affected by terrestrial input. Correlation analysis showed that the correlation between carbon, nitrogen, and phosphorus in Hengshui Lake sediment was weak, and the sources of the three nutrients might be different; the correlation between each form of phosphorus was stronger than that of each form of nitrogen, and each form of phosphorus had very good homology. The sources of various forms of nitrogen were diverse and complex. The pollution status of the lake area was evaluated by organic index and organic nitrogen. The results showed that the nutrient pollution in Hengshui Lake sediments was serious, reaching the Grade Ⅳ standard. The potential risk of nitrogen in sediments should be taken seriously and effectively controlled.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Sediments Controlled terms:Aluminum compounds - Calcium compounds - Iron compounds - Lakes - Nutrients - Organic carbon - Phosphorus - Pollution Uncontrolled terms:Correlation analysis - Distribution characteristics - Inorganic phosphorus - Morphological distribution - Nutrient pollution - Phosphorus release - Pollution assessment - Total Organic Carbon Classification code:483 Soil Mechanics and Foundations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.12e+01%, Percentage 2.01e+01%, Percentage 2.38e+01%, Percentage 2.75e+00%, Percentage 2.87e+01%, Percentage 3.58e+00%, Percentage 4.77e+00%, Percentage 5.24e+01%, Percentage 5.26e+01%, Percentage 8.23e+01% DOI:10.13227/j.hjkx.202004237 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071142 Title:Effects of Management Measures on Soil Water-soluble Carbon and Nitrogen and Their Three-Dimensional Fluorescence Characteristics of Pinus tabulaeformis Plantations on Loess Plateau Title of translation:管理措施对黄土高原油松人工林土壤水溶性碳氮及其三维荧光特征的影响 Authors:Song, Ya-Hui (1, 2); Zhang, Jiao-Yang (1, 2); Liu, Hong-Fei (3); Xue, Sha (1, 3); Li, Yang-Yang (1, 4) Author affiliation:(1) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling; 712100, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Forestry, Northwest A&F University, Yangling; 712100, China; (4) Institute of Soil and Water Conservation, Northwest A&F University, Yangling; 712100, China Corresponding author:Li, Yang-Yang(yyli@ms.iswc.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:905-913 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Pinus tabulaeformis plantation on the Loess Plateau was selected as the research site to study the changes of soil water-soluble carbon and nitrogen content and components of soil dissolved organic matter (SDOM) under different management measures (litter removal, young Pinus tabulaeformis forest, shrubs, grassland). The uncleared Pinus tabulaeformis plantation was used as the control. Results show that the soil water-soluble organic carbon content of shrubs and young Pinus tabulaeformis forests was significantly higher than that in other management measures. The content of soil water-soluble organic carbon decreased with an increase in soil depth, whereas soil water-soluble organic carbon/soil organic carbon (WSOC/SOC) increased. The change of soil water-soluble nitrogen content corresponded to that of water-soluble carbon. The content of soil water-soluble nitrogen content in the young Pinus tabulaeformis forest was higher than that of other management measures, and generally decreased with an increase in depth. Different management measures have significant effects on SDOM components. Based on three-dimensional fluorescence spectroscopy combined with parallel factor (EEM-PARAFAC) analysis, four components of SDOM are identified, which are mainly divided into categories, humus, protein-like, and soluble microbial metabolites in three major categories, among which the main component of the SDOM is the rich acid humus, and the highest content in the soil of the young forest of Pinus tabulaeformis is rich acid. The results suggested that management measures had certain effects on soil water-soluble carbon and nitrogen content as well as SDOM components, especially in young Pinus tabulaeformis forests and shrubs. The young Pinus tabulaeformis forest and shrubs increased the content of soil water-soluble organic carbon and water-soluble nitrogen, enhanced their ability to migrate and transform in the soil, and changed the structural composition of soil organic matter, hence enhancing the degree of humification and further improving soil quality.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Organic carbon Controlled terms:Biogeochemistry - Chemicals removal (water treatment) - Factor analysis - Fluorescence - Fluorescence spectroscopy - Forestry - Landforms - Metabolites - Nitrogen - Nitrogen removal - Sediments - Soil moisture Uncontrolled terms:Chinese pines - Management measures - Parallel factor analysis - Soil water - Three-dimensional fluorescences Classification code:481.1 Geology - 481.2 Geochemistry - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 804.1 Organic Compounds - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.201907085 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952724 Title:Effect of Different Ratios of Anaerobic Time and Aeration Time on the Operation of a Continuous-Flow Reactor with Partial Nitrification Granules Title of translation:不同停曝比对连续流亚硝化颗粒污泥运行的影响 Authors:Zhang, Jie (1, 2); Lao, Hui-Mei (1); Li, Dong (1); Wei, Zi-Qing (1) 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:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5097-5105 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A continuous flow reactor was inoculated at 25-28℃ with mature partial nitrification granular sludge. In order to avoid the granular sludge being crushed because of the sludge backflow through the peristaltic pump, a built-in sedimentation zone was used for internal backflow. The experiment investigated the influence of the different anaerobic time to aeration time ratio (1:1, 2:1, and 1:2) on the stability of a continuous-flow partial nitrification granular sludge system. The results showed that when the controlled anaerobic time to aeration time ratio was 1:1 and 2:1, the partial nitrification performance was good and the nitrite accumulation rates were 85.2% and 94.5%, respectively. When the controlled anaerobic time to aeration time ratio was 1:2, the partial nitrification performance gradually deteriorated, and the ammonia nitrogen removal rate and nitrite accumulation rate at the end of the stage decreased to 64.1% and 58.7%, respectively. Batch test results showed that intermittent aeration and continuous aeration can better inhibit the relative activity of NOB in the partial nitrification system to a certain extent. The longer the anaerobic time, the better the NOB activity inhibition. However, too long an anaerobic time will also lead to ammonia nitrogen removal rate. In the process of partial nitrification, the long-term stable operation of continuous flow partial nitrification process can be realized by 1:1 and coordinated control of other control conditions. An analysis of sludge performance indicated that in the anaerobic time to aeration time ratio range of 1:1-1:2, the longer the anaerobic time, the more stable the granular sludge structure. The shorter the anaerobic time, the smaller the selection pressure in the reactor, resulting in poor sludge sedimentation performance and partial disintegration of partial nitrification granular sludge. An EPS chemical analysis and a three-dimensional fluorescence spectroscopic analysis showed that the PN content was higher and the PN/PS value was higher when the anaerobic time and aeration time ratio was 2:1.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Nitrification Controlled terms:Ammonia - Disintegration - Granular materials - Nitration - Nitrogen removal - Spectroscopic analysis Uncontrolled terms:Ammonia nitrogen removal - Co-ordinated control - Continuous flow reactors - Granular sludge systems - Intermittent aeration - Nitrite accumulation - Partial nitrification - Three-dimensional fluorescences Classification code:801 Chemistry - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 5.87e+01%, Percentage 6.41e+01%, Percentage 8.52e+01%, Percentage 9.45e+01% DOI:10.13227/j.hjkx.202003118 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008929 Title:Decision-making Analysis of Excess Sludge Pretreatment for Struvite Recovery Based on AHP-PROMETHEE Ⅱ Method Title of translation:基于AHP-PROMETHEE Ⅱ法的鸟粪石磷回收污泥预处理方案决策 Authors:Liu, Xiao-Lei (1); Li, An-Jie (1) Author affiliation:(1) Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing; 100875, China Corresponding author:Li, An-Jie(liaj@bnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3725-3730 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Phosphorus is a non-renewable resource. The recovery of phosphorus from excess sludge by the struvite precipitation process has been applied on a full-scale. However, different sludge pretreatment methods have been used to release carbon, nitrogen, and phosphate from excess sludge, which could affect the subsequent struvite precipitation process. In this study, the decision-level analytical structure of the 3-layer and 6-index was constructed to evaluate the effects of six excess sludge treatment processes on struvite recovery. According to the preference ranking organization method for the enrichment of evaluations Ⅱ (PROMETHEEⅡ) decision-making analysis, enzymatic hydrolysis or enzymatic hydrolysis-anaerobic fermentation was the better sludge treatment choice for struvite recovery under the "product quality" priority case, while thermal hydrolysis or thermal hydrolysis-anaerobic fermentation could be better under the "time and economy" priority case. This study provides a recommendation for the selection and design of excess sludge treatment for struvite recovery.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Enzymatic hydrolysis Controlled terms:Decision making - Fermentation - Hierarchical systems - Phosphorus - Precipitation (chemical) - Quality control - Recovery Uncontrolled terms:Anaerobic fermentation - Analytical structure - Decision making analysis - Non-renewable resource - Sludge pretreatment - Struvite precipitation - Struvite recoveries - Thermal hydrolysis Classification code:802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 912.2 Management - 913.3 Quality Assurance and Control - 961 Systems Science DOI:10.13227/j.hjkx.201912183 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256462 Title:Effects of Short-term Application of Moutai-flavor Vinasse Biochar on Nitrogen Availability and Bacterial Community Structure Diversity in Yellow Soil of Guizhou Province Title of translation:酒糟生物炭短期施用对贵州黄壤氮素有效性及细菌群落结构多样性的影响 Authors:Zhang, Meng (1); Liu, Yan-Ling (1); Wei, Quan-Quan (1); Gou, Jiu-Lan (1) Author affiliation:(1) Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang; 550006, China Corresponding author:Gou, Jiu-Lan(150046390@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4690-4700 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To realize the comprehensive utilization of resources of moutai-flavor vinasse and improve the nitrogen efficiency of yellow soil, a field culture experiment was carried out to study the effects of short-term application of vinasse biochar on nitrogen availability and bacterial community structure diversity in yellow soil of Guizhou by setting 5 biochar dosages of 0% (MB0), 0.5% (MB0.5), 1.0% (MB1.0), 2.0% (MB2.0), and 4.0% (MB4.0). The results showed that the total nitrogen(TN) and nitrate nitrogen(NN) content in the soil increased by 35.79%-365.26% and 122.96%-171.80%, the microbial biomass nitrogen (MBN) content decreased by 34.10%-59.95%, and the AN/TN, NN/TN, and MBN/TN exhibited a decreasing trend with an increase in the amount of biochar applied. The application of vinasse biochar significantly reduced the number of OTU and community richness and diversity of soil bacteria; the influence degree increased with an increase in the application amount of vinasse biochar. In comparison with the MB0 treatment, the application of biochar significantly changed the soil bacterial community structure. The relative abundance of Bacteroidetes increased by 1.76-2.11 times with an increase in the biochar application. However, the relative abundance of Acidobacteria, Chloroflexi, Gemmatimonadetes, Planctomycetes, Armatimonadetes, Thaumarchaeota, and Nitrospirae decreased to different degrees, with the most significant decrease in the MB4.0 treatment. The application of vinasse biochar increased the relative abundance of certain soil functional bacteria, such as Streptomyces and Pusillimonas, and simultaneously also decreased the relative abundance of the dominant bacteria, such as Lysobacter and Gemmatimonas. In addition, the redundancy analysis (RDA) showed that the MBN/TN, NN, and MBN were the main cause of soil bacterial community structure change in nitrogen environment factor. The MBN/TN and MBN exhibited a significantly positive correlation with Thaumarchaeota and Nitrospira, which indicated that the short-term application of vinasse biochar can significantly reduce the abundance of ammonia-oxidizing archaea and nitrifying bacteria, inhibit the ammonia-oxidizing effect and nitrification rate of soil, and improve the availability of soil nitrogen. In summary, the short-term application of vinasse biochar can improve nitrogen nutrients, change the structure and diversity of soil bacterial community, and effectively control the risk of soil nitrogen leaching by inhibiting ammonia oxidation and nitrification of soil, to improve the availability of soil nitrogen.
© 2020, Science Press. All right reserved. Number of references:48 Main heading:Soils Controlled terms:Ammonia - Bacteria - Nitrification Uncontrolled terms:Ammonia-oxidizing archaea - Bacterial community structure - Comprehensive utilizations - Nitrogen availability - Nitrogen environment - Positive correlations - Redundancy analysis (RDA) - Soil bacterial community Classification code:483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.23e+02% to 1.72e+02%, Percentage 3.41e+01% to 6.00e+01%, Percentage 3.58e+01% to 3.65e+02% DOI:10.13227/j.hjkx.202003113 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256530 Title:Preliminary Screening for the Urban Forest Against Combined Air Pollution Title of translation:抗大气复合污染的城市森林植物初步筛选 Authors:Li, Pin (1); Wei, Yan-Yan (2); Feng, Zhao-Zhong (3) Author affiliation:(1) College of Forestry, Beijing Forestry University, Beijing; 100083, China; (2) School of Chemical Engineering, Beijing University of Chemical Technology, Beijing; 100029, 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:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4495-4503 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Combined air pollution has become one of the most important city diseases in China. The construction of an urban forest not only needs landscape aesthetics, but also requires selecting a plant of high comprehensive tolerance threshold based on the needs of the ecological environment of each city, which has become a standard to maintain the sustainable development of the urban forest ecological function under environmental pollution. According to the comprehensive factor analysis of the sorption and absorption capacity of 537 plants to six air pollutants (i.e., sulfur dioxide, nitrogen dioxide, hydrogen fluoride, chlorine, ozone, and particulate matters), the results showed that the tree species with strong comprehensive tolerance ability to six air pollutants were Morus alba, Platycladus orientalis, and Ailanthus altissima; the tree species with medium comprehensive tolerance ability were Populus tomentosa, Acer truncatum, Sabina chinensis, Amygdalus davidiana, Salix babylonica, Paulownia fortunei, and Pinus tabulaeformis; the trees species with relatively weak comprehensive tolerance ability were Robinia pseudoacacia, Populus×canadensis, Ginkgo biloba, Juglans regia, Platanus acerifolia, Koelreuteria paniculata, Lagerstroemia indica, and Forsythia suspensa. According to the characteristics of climate, economic structure, and air pollutants of the cities in the north and south of China, the urban forest should be constructed using selected species with a strong comprehensive tolerance ability to achieve maximum purification effect of the urban forest ecological service function.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Forestry Controlled terms:Air cleaners - Air pollution - Diagnosis - Economics - Fluorine compounds - Nitrogen oxides - Plants (botany) - Sulfur dioxide - Sustainable development Uncontrolled terms:Ecological environments - Ecological functions - Ecological services - Environmental pollutions - Lagerstroemia indica - Pinus tabulaeformis - Platycladus orientalis - Robinia pseudo-acacia Classification code:451 Air Pollution - 451.2 Air Pollution Control - 461.6 Medicine and Pharmacology - 804.2 Inorganic Compounds - 971 Social Sciences DOI:10.13227/j.hjkx.202004038 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368668 Title:Trace Metals Pollution and Health Risks for Planning Area Soils of 193 Chinese Cities Title of translation:中国193个城市规划区土壤微量元素污染与健康风险 Authors:Li, Kuo (1, 2, 3, 4, 5); Peng, Min (1, 2, 3, 4, 5); Yang, Zheng (2, 3, 4, 5); Yang, Ke (2, 3, 4, 5); Liu, Fei (2, 3, 4, 5); Zhao, Chuan-Dong (2, 3, 4, 5); Cheng, Xiao-Meng (2); Ma, Hong-Hong (2, 3, 4, 5); Guo, Fei (2, 3, 4, 5); Tang, Shi-Qi (2, 3, 4, 5); Liu, Ying-Han (2, 3, 4, 5); Cheng, Hang-Xin (2, 3, 4, 5) Author affiliation:(1) School of Geosciences and Resources, China University of Geosciences (Beijing), Beijing; 100083, China; (2) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (3) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (4) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, China Geological Survey, Langfang; 065000, China; (5) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding author:Cheng, Hang-Xin(chenghangxin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1825-1837 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Urban soils are more easily subjected to modification, especially by contamination because of various human activities, and the environmental problems caused by urban soil pollution have become more prominent. To systematically investigate concentration characteristics, pollution levels, and exposure risks of 13 trace metals in urban soils of planning areas for 193 cities above the prefectural level, located in 31 provinces (autonomous regions and municipalities) of China, levels of pollution in urban soil were evaluated using the geoaccumulation index and integrated pollution index of trace metals, and health risks of residents exposed to urban soils were quantified using the health risk assessment method recommended by the US Environmental Protection Agency (USEPA). The results show that the median concentrations of As, Be, Cd, Co, Cr, Cu, Hg, Ni, Pb, Se, Tl, V, and Zn in topsoils of urban planning areas were 9.25, 2.14, 0.174, 12.4, 68.4, 28.2, 0.095, 27.7, 31.1, 0.29, 0.61, 82.7, and 82.2 mg•kg^-1, respectively. Compared with the corresponding urban soil background values, the concentrations of Cd, Hg, and Se changed significantly. The geoaccumulation index (Igeo) values showed that Hg in urban soils of the planning area was the most severe pollutant, followed by Se and Cd, which caused pollution levels of uncontaminated to moderately contaminated levels, while other trace metals were uncontaminated. The Nemerow IPI (IPIN) revealed that the soils in 22 urban planning areas were heavily polluted and 16 urban planning areas were moderately polluted; in addition, the most polluted city in China was Zhuzhou in the Hunan province. The results of health risk assessment indicate that the soils in the five urban planning areas-Chenzhou City, Huangshi City, Zhuzhou City, Xiangtan City, and Longyan City-posed potential non-carcinogenic risks to children, and the major factor triggering risks was ingestion of Pb. To understand the soil pollution status and distribution of contaminated land parcel, it is suggested to carry out detailed investigation in cities with integrated moderate to heavy pollution to establish the list of contaminated land parcel and implement pollution control and restoration.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Soil pollution Controlled terms:Contamination - Environmental Protection Agency - Health - Health risks - Metals - Risk assessment - Selenium - Soil pollution control - Soils - Trace elements - Urban planning Uncontrolled terms:China - Environmental problems - Geo-accumulation index - Integrated pollution indices - Pollution level - Trace metal - Urban soils - US Environmental Protection Agency Classification code:403.1 Urban Planning and Development - 454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201909142 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105531 Title:Spatiotemporal Variations in Nutrient Loads in River-lake System of Changdang Lake Catchment in 2016-2017 Title of translation:2016~2017年长荡湖流域河湖系统营养盐时空分布机制分析 Authors:Li, Xin-Yan (1); Li, Heng-Peng (1); Jiang, San-Yuan (1); Ma, Pei (2); Lai, Xi-Jun (1); Deng, Jian-Cai (1); Chen, Dong-Qiang (1); Geng, Jian-Wei (1) Author affiliation:(1) Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) Schools of Resources and Environmental Engineering, Henan Institute of Engineering, Zhengzhou; 451191, China Corresponding author:Li, Heng-Peng(hpli@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4042-4052 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Eutrophication of shallow lakes in the middle and lower reaches of the Yangtze River has become an increasingly serious problem. In this study, we investigated the temporal and spatial variations in nutrient loads (nitrogen, N and phosphorus, P) in the Changdang Lake Catchment located to the northwest of Lake Taihu through field sampling and laboratory analysis in 2016-2017. The results show the severity of the N and P pollution in the Changdang Lake catchment. The mean river water concentrations of TN, NO3^--N, NH4⁺-N, TP, Chla, and permanganate index are (3.70±0.76) mg•L^-1, (1.81±0.42) mg•L^-1, (1.03±0.61) mg•L^-1, (0.38±0.31) mg•L^-1, (25.74±37.00) μg•L^-1, and (6.35±0.81) mg•L^-1, respectively. N pollution in the river is more severe in winter and spring than in summer and autumn whereas P pollution in the river is worse in autumn and winter than in spring and summer. Spatially, the magnitude of river N and P pollution follows the order of northern>northwestern>southern>eastern part of the study area. The rivers are in a state of moderate to severe eutrophication. The mean lake water concentrations of TN, NO3^--N, NH4⁺-N, TP, Chla, and permanganate index are (2.25±0.94) mg•L^-1, (0.98±0.47) mg•L^-1, (0.19±0.14) mg•L^-1, (0.11±0.03) mg•L^-1, (18.71±8.76) μg•L^-1, and (4.59±1.09) mg•L^-1, respectively. The water quality in Changdang Lake is categorized as worse than class Ⅲ for TN and TP concentrations, which show decreasing trends from the west to the east to the south of the lake. The lake is in a status of slight to moderate eutrophication. The lake water quality is affected by the combination of sewage discharge and non-point source pollutant losses. The inflow rivers including the Danjinlicao River, Tongji River, and Xuebu River are the dominant pollution sources for Changdang Lake. The Danjinlicao River transports 10-12 times the total N and P loads transported by Tongji and Xuebu rivers. Changes in land use and atmospheric deposition are the driving factors of the deterioration of water quality and eutrophication in the catchment.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:River pollution Controlled terms:Catchments - Deterioration - Discharge (fluid mechanics) - Eutrophication - Lake pollution - Lakes - Land use - Meteorological problems - Nutrients - Rivers - Runoff - Sewage - Springs (components) - Water quality Uncontrolled terms:Atmospheric depositions - Laboratory analysis - Lake water quality - Middle and lower reaches of the yangtze rivers - Non-point source pollutants - Sewage discharges - Spatio-temporal variation - Temporal and spatial variation Classification code:403 Urban and Regional Planning and Development - 442.1 Flood Control - 443.1 Atmospheric Properties - 445.2 Water Analysis - 452.1 Sewage - 453 Water Pollution - 601.2 Machine Components - 951 Materials Science DOI:10.13227/j.hjkx.201912201 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278093 Title:Effects of Exogenous Spermidine on Seed Germination and As Uptake and Accumulation of Rice Under As⁵⁺ Stress Title of translation:外源亚精胺对 As⁵⁺胁迫下水稻种子萌发和As吸收积累的影响 Authors:Liu, Shu-Jin (1, 2); Huang, Yi-Zong (1); Bao, Qiong-Li (1); Huang, Yong-Chun (1); Zhang, Sheng-Nan (1); Han, Nian (1); Liu, Yu-Rong (2); Hu, Hong-Qing (2) Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin; 300191, China; (2) College of Resources and Environment, Huazhong Agricultural University, Wuhan; 430070, China Corresponding author:Huang, Yi-Zong(yizonghuang@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1505-1512 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As pollution in farmland has a toxic effect on the growth of crops, which reduces their yield and quality. The effects of exogenous spermidine (Spd) on rice seed germination and seedling growth under As⁵⁺ stress were studied. The results showed that exogenous Spd could promote the germination of rice seeds under As⁵⁺ stress, improve the germination potential and germination rate of seeds, and promote the growth of seedling roots. The addition of Spd could increase the activity of catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD) of rice seedlings and roots under As⁵⁺ stress, and reduce the content of malondialdehyde (MDA) in rice buds and roots. When As⁵⁺ concentration was 25 μmol•L^-1, adding 500 μmol•L^-1and 1 000 μmol•L^-1 Spd, MDA content in rice roots was decreased by 12.3% and 31.3% and CAT activity of rice shoots was increased by 105.1% and 101.4%, and CAT activity of rice roots was increased by 29.9% and 57.1%, respectively. The addition of Spd also affected the uptake and accumulation of As in rice. When the concentration of As⁵⁺ was 25 μmol•L^-1, adding 500 μmol•L^-1and 1 000 μmol•L^-1Spd, the concentration of As in rice shoots decreased by 69.4% and 75.1%, and As concentration in rice roots decreased by 7.6% and 24.4%, respectively. Spd could therefore effectively alleviate the toxic effect of As⁵⁺ on rice.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Seed Controlled terms:Arsenic - Cultivation - Enzymes - Industrial poisons Uncontrolled terms:Germination of rice seeds - Germination potential - Oxidative damage - Rice - Seed germination - Spermidine - Superoxide dismutases - Uptake and accumulations Classification code:804 Chemical Products Generally - 821.3 Agricultural Methods - 821.4 Agricultural Products Numerical data indexing:Molar_Concentration 2.50e-02mol/m3 to 2.20e-02mol/m3, Percentage 1.01e+02%, Percentage 1.05e+02%, Percentage 1.23e+01%, Percentage 2.44e+01%, Percentage 2.99e+01%, Percentage 3.13e+01%, Percentage 5.71e+01%, Percentage 6.94e+01%, Percentage 7.51e+01%, Percentage 7.60e+00%, Molar_Concentration 1.00e+00mol/m3 to 2.20e-02mol/m3 DOI:10.13227/j.hjkx.201909083 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658135 Title:Spatial Distribution Characteristics and Driving Factors of Aerobic Denitrification Bacterial Community Structure from Baiyangdian Lake in Xiong'an New Area During the Winter Freezing Period Title of translation:雄安新区-白洋淀冬季冰封期水体好氧反硝化菌群落空间分布特征及驱动因素 Authors:Zhou, Shi-Lei (1); Sun, Yue (1); Yue, Ge-Cheng (1); Zhang, Hang (1); Wang, Zhou-Qiang (1); Liu, Shi-Chong (1); Peng, Rui-Zhe (1); Yuan, Shi-Chao (1); Li, Zai-Xing (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 Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2177-2187 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To isolate the aerobic denitrification bacteria suitable for water quality in the low-temperature period of Baiyangdian Lake, a water quality investigation and bioinformatics analysis of the aerobic denitrification bacterial community were carried out using a MiSeq high-throughput sequencing technique based on napA. Moreover, α-diversity, β-diversity, and network analyses were also carried out. The results showed significant differences in the water quality of different sampling sites in Baiyangdian Lake, and the estuary area exhibited the highest nitrogen concentration. α-diversity exhibited significant differences (P<0.05), and the abundance and diversity of ZZD and BH were the lowest. The operational taxonomic units of the water body mainly belonged to Proteobacteria (α-Proteobacteria, β-Proteobacteria, and γ-Proteobacteria). Meanwhile, Venn diagram analysis indicated the community of aerobic denitrification bacteria exhibited significant differences, and variance inflation factor and redundancy analysis showed that temperature, dissolved oxygen, ammonia, nitrate, dissolved total phosphorus, and redox potential were the main environmental factors. Network analysis showed that symbiotic relationships accounted for a major proportion of the microbial network. Mantel test analysis shows that temperature, redox potential, nitrate, ammonia, dissolved total phosphorus, and iron and manganese are the key factors affecting the evolution of modular community structure. From all the results, the MiSeq high-throughput sequencing technique based on the napA gene was an effective tool to explore the changes of aerobic denitrification bacterial community structure, which could supply a reference to isolate the "directional-accurate-efficient" aerobic denitrification bacterial agent in the future.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Quality control Controlled terms:Aerobic bacteria - Ammonia - Biochemical oxygen demand - Denitrification - Dissolution - Dissolved oxygen - Factor analysis - Lakes - Nitrates - Phosphorus - Redox reactions - Temperature - Water quality Uncontrolled terms:Aerobic denitrification - Bacterial community structure - Bioinformatics analysis - Distribution characteristics - High-throughput sequencing - Nitrogen concentrations - Operational taxonomic units - Symbiotic relationship Classification code:445.2 Water Analysis - 461 Bioengineering and Biology - 641.1 Thermodynamics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.201910195 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658271 Title:Relationship Between Source-Sink Landscape Pattern and Antibiotics in Surface Water in Peri-urban Watershed Title of translation:城郊流域源汇景观格局与水体抗生素的关系 Authors:Li, Min (1, 2); Tang, Jian-Feng (3); Chen, Li-Ding (1, 2); Zhao, Fang-Kai (1, 2); Feng, Qing-Yu (1); Yang, Lei (1, 2) Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environment Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China Corresponding author:Yang, Lei(leiyang@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2264-2271 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Quantitively identifying the effect of land use patterns on antibiotics in surface water has significance in maintaining water quality and protecting residents' health in urban and rural regions. In this study, a typical peri-urban watershed, located in the Yangtze River Delta, was selected as the study area. Based on surface water sampling, laboratory analysis, and source-sink landscape model (SSLM) analysis, the component and distribution characteristics of antibiotics in surface water in different sub-watersheds were analyzed. The effects of source and sink landscape patterns on antibiotic concentrations in surface water were identified. The results of this study showed substantial differences in types and concentrations of antibiotics in surface water in different sub-watersheds. The total concentrations of antibiotics in surface water ranged from 1.12 ng•L^-1 to 53.74 ng•L^-1. From upstream to downstream, the area of "source" landscape increased, and the area of "sink" landscape decreased based on landscape pattern analysis. The results of non-metric multidimensional scaling (NMDS) showed that sub-watersheds with similar "source-sink" landscape patterns were detected as having similar antibiotics types and concentrations in surface water. Land use composition, distance, elevation, and slope degree had substantial impacts on antibiotic concentrations in surface water. The results of this study also found that location-weighted landscape index (LWLI) was positive correlated with antibiotics concentrations in surface water based on correlation analysis and redundancy analysis. The sub-watersheds with high LWLI values usually had relatively higher antibiotic concentrations in surface water. This study indicated that optimization of "source" and "sink" landscapes at the watershed scale can decrease antibiotic contamination in surface water. Furthermore, SSLM is an effective tool in landscape optimization at the watershed scale.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Rivers Controlled terms:Antibiotics - Land use - Water quality - Watersheds Uncontrolled terms:Antibiotic concentration - Correlation analysis - Distribution characteristics - Laboratory analysis - Landscape pattern analysis - Non-metric multidimensional scaling - Redundancy analysis - Yangtze river delta Classification code:403 Urban and Regional Planning and Development - 444.1 Surface Water - 445.2 Water Analysis - 461.6 Medicine and Pharmacology Numerical data indexing:Mass_Density 1.12e-09kg/m3 to 5.37e-08kg/m3 DOI:10.13227/j.hjkx.201911114 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658474 Title:Nitrous Oxide Emission and Denitrifying Bacterial Communities as Affected by Drip Irrigation with Saline Water in Cotton Fields Title of translation:咸水滴灌对棉田土壤N2O排放和反硝化细菌群落结构的影响 Authors:Guo, Hui-Nan (1); Ma, Li-Juan (1); Huang, Zhi-Jie (1); Li, Mei-Qi (1); Hou, Zhen-An (1); Min, Wei (1) Author affiliation:(1) Key Laboratory of Oasis Ecological Agriculture of Xinjiang Corps, College of Agriculture, Shihezi University, Shihezi; 832003, China Corresponding author:Min, Wei(minwei555@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2455-2467 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A shortage of freshwater resources has become a fundamental and chronic problem for sustainable agriculture development in arid regions. Use of saline water irrigation has become an important means for alleviating freshwater scarcity. However, long-term irrigation with saline water may cause salt accumulation in the soil, and further affect nitrogen transformation and N2O emission. To investigate this, we conducted a ten-year field experiment to evaluate the effect of irrigation water salinity and N amount on N2O emission and denitrifying bacterial communities. The experimental design was a 2×2 factorial with two irrigation water salinity levels (salinity levels are expressed as electrical conductivity), 0.35 dS•m^-1 and 8.04 dS•m^-1, and two N amounts, 0 kg•hm^-2 and 360 kg•hm^-2, representing SFN0, SHN0, SFN360, and SHN360, respectively. The results indicated that long-term saline water irrigation significantly increased soil salinity, moisture, and NH4⁺-N content, whereas it decreased soil pH, NO3^--N, organic matter, and total nitrogen content. Irrigation with saline water significantly inhibited N2O emission, being associated with a decreased in level of 45.19% (unfertilized plots) and 43.50% (fertilized plots) compared with irrigation with fresh water. N2O emission increased as the N amount increased; the N2O emission was 161% higher in the fertilized plots than in the unfertilized plots. In the unfertilized plots, saline water irrigation significantly reduced the activity of denitrifying enzymes, the abundance of nirK, nirS, and nosZ, and the diversity of denitrifying bacterial communities. In the fertilized plots, saline water irrigation did not significantly affect the abundance of nosZ, whereas it significantly reduced the abundance of nirK and nirS. Saline water irrigation and nitrogen application altered the community structures of denitrifying bacteria with nirK, nirS, and nosZ; the irrigation water salinity seemed to have a greater impact on the denitrifying bacterial community in comparison with fertilization. Linear discriminant analysis (LDA) effect size (LEfSe) analysis demonstrated that denitrifying bacterial potential biomarkers increased as the water salinity increased, meaning that saline water irrigation could alter the community structures of denitrifying bacteria, and promote the growth of dominant species. Our findings indicate that increased abundance of nosZ, nirK, and nirS promoted N2O emission, and although long-term saline water reduced soil N2O emission, it resulted in a continuous increase of soil salinity. The emission of N2O had extremely positive correlation with soil NO3^--N, organic matter, total nitrogen, denitrifying bacteria abundance, and denitrifying enzyme activities, and was negatively correlated with soil moisture. The soil physiochemical properties and the community structure of denitrifying bacteria had a significant influence on soil N2O emission in cotton fields, and nirS bacteria showed the highest association with N2O emission, thus it might be a dominant microflora in the process of denitrification. This information will aid in reducing atmospheric N2O emissions in agriculturally productive alluvial grey desert soils.
© 2020, Science Press. All right reserved. Number of references:59 Main heading:Saline water Controlled terms:Agricultural robots - Bacteria - Biogeochemistry - Cotton - Denitrification - Discriminant analysis - Enzymes - Irrigation - Nitrogen - Nitrogen oxides - Organic compounds - Soil moisture - Soil pollution Uncontrolled terms:Electrical conductivity - Linear discriminant analysis - Nitrogen transformations - Nitrous oxide emissions - Physio-chemical properties - Saline water irrigations - Sustainable agriculture - Total nitrogen content Classification code:444 Water Resources - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 821.3 Agricultural Methods - 821.4 Agricultural Products - 922 Statistical Methods Numerical data indexing:Percentage 1.61e+02%, Percentage 4.35e+01%, Percentage 4.52e+01% DOI:10.13227/j.hjkx.201910137 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371230 Title:Characteristics of Organics Transformation and Sludge Morphology in an ABR for Sewage Treatment with Different HRTs Title of translation:不同HRT下污水中有机物在ABR中的转化过程及污泥形态特征 Authors:Cheng, Cheng (1); Zhu, Lin (1); Guo, Kai-Cheng (1); Wang, Qian (1); Song, Jia-Jun (1); Liu, Wen-Ru (1, 2, 3); Shen, Yao-Liang (1, 2, 3) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China; (3) Key Laboratory of Environmental Science and Engineering of Jiangsu Province, Suzhou; 215009, China Corresponding author:Shen, Yao-Liang(ylshen@mail.usts.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1808-1815 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The characteristics of organics transformation and sludge morphology of in an ABR(anaerobic baffled reactor) for sewage treatment with different HRTs were investigated based on reactor performance, particle size distribution, and scanning electron microscopy (SEM). Results showed that the COD removal rate was stably maintained above 90.0% when the HRT decreased from 15 h to 4 h. However, the first compartment of ABR contributed to 90%, 78.56%, 74.18%, and 58.91% of the total COD removal when the HRT was 10, 7.5, 5, and 4 h, respectively. When the HRT was reduced, the total amount of volatile fatty acids (VFAs) in the first compartment of ABR significantly increased, and the abundance of acetic acid, being the major constituent of VFAs, gradually increased from 51.36% to 58.77%; the concentrations of butyric acid and propionic acid were maintained and constituted a minority of the VFAs. The sludge morphology in ABR significantly changed in the wake of run time. On day 111, granulation of sludge was achieved. Additionally, the degree of sludge granulation showed a decreasing trend with the direction of water flow. SEM observations of granular sludge showed that the separation of biomass did occur in the ABR. Along the direction of water flow, filamentous bacteria, M. methane, monococci, and bacilli were the dominant microbes in each compartment of the ABR.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Volatile fatty acids Controlled terms:Bacteria - Butyric acid - Flow of water - Granulation - Hydraulics - Morphology - Particle size - Particle size analysis - Propionic acid - Residence time distribution - Scanning electron microscopy - Sewage - Sewage treatment Uncontrolled terms:Anaerobic baffled reactor - COD removal rate - Filamentous bacteria - Hydraulic residence time - Reactor performance - SEM observation - Sludge morphology - Volatile fatty acids (VFAs) Classification code:452.1 Sewage - 452.2 Sewage Treatment - 631.1.1 Liquid Dynamics - 632.1 Hydraulics - 802.3 Chemical Operations - 804.1 Organic Compounds - 922.1 Probability Theory - 951 Materials Science Numerical data indexing:Percentage 5.89e+01%, Percentage 7.42e+01%, Percentage 7.86e+01%, Percentage 9.00e+01%, Time 1.44e+04s, Time 5.40e+04s to 1.44e+04s DOI:10.13227/j.hjkx.201910197 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071344 Title:Effect of Tetracycline Antibiotic on Abundance and Transcriptional Expression Level of Tetracycline Resistance Genes in Activated Sludge Title of translation:四环素抗生素对污泥中四环素抗性基因丰度和表达水平的作用影响 Authors:Ruan, Xiao-Hui (1); Qian, Ya-Jie (1); Xue, Gang (1); Gao, Pin (1) Author affiliation:(1) State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China Corresponding author:Gao, Pin(pingao@dhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:823-830 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Tetracycline resistant bacteria (TRB) screened from activated sludge were used to study the effect of tetracycline (TC) antibiotic on the transcriptional expression of tetracycline resistance genes (TC-ARGs). The gene abundances of seven TC-ARGs including tetA, tetC, tetG, tetM, tetO, tetW, and tetX, as well as their expression levels, were quantified by quantitative PCR (qPCR) and reverse transcriptional PCR (RT-PCR). The correlations between TC concentrations and gene abundance of TC-ARGs and their expression levels were discussed. The results showed that the gene abundances of tetA, tetG, and tetW generally increased with increasing TC exposure concentrations during the entire culture cycle, whereas other TC-ARGs fluctuated greatly. The impact of TC stress on the transcriptional expression level of different TC-ARGs varied to a great extent. The gene expression of tetA was relatively stable and exhibited an upregulated trend with increasing TC concentrations. When the TC concentration was 100 mg•L^-1, the upregulation of tetA expression was as high as 5.3-fold compared with the control. Under short-term TC stress (one day), the transcriptional expression level was upregulated with increasing TC concentration. The correlation results showed that gene abundances of tetA and tetW correlated significantly with their respective expression levels, indicating that they can evaluate expression levels to a certain extent, which can further mirror functional activities and environmental risks.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Antibiotics Controlled terms:Gene expression - Polymerase chain reaction Uncontrolled terms:Activated sludge - Environmental risks - Exposure concentration - Expression levels - Functional activities - Resistance genes - Resistant bacteria - Tetracycline antibiotics Classification code:461.6 Medicine and Pharmacology - 461.9 Biology - 801.2 Biochemistry Numerical data indexing:Mass_Density 1.00e-01kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201907209 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796318 Title:Effect of Biomass Burning on the Light Absorption Properties of Water Soluble Organic Carbon in Atmospheric Particulate Matter in Changchun Title of translation:长春秋季生物质燃烧对PM2.5中WSOC吸光性的影响 Authors:Meng, De-You (1, 2); Cao, Fang (1, 2); Zhai, Xiao-Yao (1, 2); Zhang, Shi-Chun (3); Zhang, Yan-Lin (1, 2) Author affiliation:(1) School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) International Joint Laboratory on Climate and Environment Change (ILCEC), Yale-NUIST Center on Atmospheric Environment, Nanjing; 210044, China; (3) Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun; 130102, China Corresponding author:Cao, Fang(caofangle@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2547-2554 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the effect of biomass burning in Changchun in autumn on the absorbance of water-soluble organic carbon (WSOC) on PM2.5, PM2.5 samples were collected from October to November 2017. The light absorption characteristics of WSOC, carbonaceous components, and carbohydrate content in PM2.5 were analyzed. The study showed that the average concentrations of WSOC, organic carbon (OC), and elemental carbon (EC) in PM2.5 in Changchun were (10.12±3.47), (17.07±5.64), and (1.34±0.75) μg•m^-3, respectively; the average contribution rate of secondary organic carbon (SOC) to OC was 38.93%. The total sugar concentration in Changchun is (1 049.39±958.85) ng•m^-3, of which the content of anhydroglucose (L-glucan, galactan, and mannan), as a biomass burning tracer in total sugar, was 91.69%. The results of sugar correlation analysis showed that biomass combustion was the main source of contribution to carbohydrates in the autumn of Changchun. The light absorption wavelength index of WSOC in autumn was 5.75±1.06, and the unit mass absorption efficiency was (1.23±0.28) m²•g^-1, indicating that biomass combustion has an important influence on WSOC absorbance. The biomass combustion characteristic source parameter was used to quantify the contribution of biomass burning to WSOC concentration, which was found to be 58.82%, while the contribution to total WSOC light absorption was 40.92%.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Organic carbon Controlled terms:Biomass - Carbohydrates - Combustion - Light absorption - Particles (particulate matter) - Water absorption Uncontrolled terms:Absorption characteristics - Absorption wavelengths - Atmospheric particulate matter - Average concentration - Carbohydrate content - Carbonaceous components - Secondary organic carbons (SOC) - Water-soluble organic carbon Classification code:741.1 Light/Optics - 802.3 Chemical Operations - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 3.89e+01%, Percentage 4.09e+01%, Percentage 5.88e+01%, Percentage 9.17e+01% DOI:10.13227/j.hjkx.201911026 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202408801963 Title:Characteristics and Sources of Inorganic Ions and Organic Acids in Precipitation in the Northern Suburb of Nanjing, China Title of translation:南京北郊降水无机离子和有机酸的化学特征及来源分析 Authors:Yang, Xiao-Ying (1); Cao, Fang (1); Lin, Yu-Qi (1); Zhang, Yan-Lin (1) Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Cao, Fang(caofangle@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2519-2527 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Rainwater samples were collected in Nanjing from December 2016 to November 2017. Water-soluble ion and organic acid content in rainwater samples was determined to analyze the chemical characteristics of precipitation and their seasonality. The positive matrix factorization (PMF) model was employed to identify the potential sources of precipitation. The results show that the volume-weighted mean of pH in precipitation was 5.6, which was higher than the results of previous studies conducted in Nanjing. The volume-weighted mean of total ions was 297.3 μmol•L^-1, and the concentrations of each species were in the order of NH4⁺>Ca²⁺>K⁺>Na⁺>Mg²⁺ for cations and NO3^->SO4^2->Cl^->F^- for anions. The volume-weighted mean of organic acids was 2.86 μmol•L^-1, with organic acids accounting for 2.2% of the total anions. CHO2^-, C2H3O2^-, and C2O4^2- were the main organic acids in precipitation with annual volume-weighted means of 1.35, 1.05, and 0.26 μmol•L^-1, respectively. A significant seasonality was observed for the ions and organic acids. The volume-weighted mean of inorganic ions was higher in winter and spring compared to those in summer and autumn. On the other hand, the volume-weighted mean of total organic acids was the highest in summer, followed by spring, and the lowest in winter. High concentrations of organic acids in the summer can be attributed to the biogenic emissions from plants. The ratio of formic and acetic (F/A) showed that organic acids mainly originated from primary emissions (e.g., biogenic emissions, combustion of organics, and traffic emissions) rather than atmospheric oxidation processes. Using the PMF model, we found that marine sources and secondary inorganic products (40.0%) were the predominant sources of inorganic ions and organic acids in precipitation, followed by burning of biomass (22.2%), continental origin and waste incineration (22.0%), secondary organic products (14.5%), and biological emissions along with their secondary products (1.3%).
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Organic acids Controlled terms:Chemical analysis - Factorization - Ions - Springs (components) - Waste incineration Uncontrolled terms:Atmospheric oxidation - Biological emission - Chemical characteristic - Continental origin - Inorganic products - Positive matrix factorization models - Volume-weighted means - Water-soluble ions Classification code:452.4 Industrial Wastes Treatment and Disposal - 601.2 Machine Components - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.45e+01%, Percentage 2.20e+00%, Percentage 2.20e+01%, Percentage 2.22e+01%, Percentage 4.00e+01%, Molar_Concentration 2.60e-04mol/m3 to 2.20e-02mol/m3, Molar_Concentration 2.86e-03mol/m3 to 2.20e-02mol/m3, Molar_Concentration 2.97e-01mol/m3 to 2.20e-02mol/m3, Percentage 1.30e+00% DOI:10.13227/j.hjkx.201911049 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408370399 Title:Distribution of Four Artificial Sweeteners in Water Treatment and Water Supply System in City H of Zhejiang Province Title of translation:浙江省H市水处理及供水系统4种人工甜味剂的分布特征 Authors:Ma, Xiao-Yan (1); Hu, Hui (1); Lu, Si-Jia (1); Li, Qing-Song (2); Xue, Le-Fei (1); Li, Xue-Chun (1); Deng, Jing (1) Author affiliation:(1) College of Civil Engineering, Zhejiang University of Technology, Hangzhou; 310014, China; (2) Fujian Engineering and Research Center of Rural Sewage Treatment and Water Safety, Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen; 361005, China Corresponding author:Deng, Jing(seudjing@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1629-1635 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Taking the sewage and drinking water treatment system of two cities in Zhejiang Province as the main research target, a systematic investigation on the common artificial sweeteners was carried out by solid phase extraction-high performance liquid chromatography (SPE-HPLC). The results showed that SPE-HPLC can accurately determine micro acesulfame (ACE), saccharin (SAC), aspartame (ASP), and neotame (NEO) in water. The detection limits were 57, 120, 170, and 47 μg•L^-1, and the quantification limits were 190, 400, 567, and 157 μg•L^-1, respectively. After optimization of the solid phase extraction procedure when using PWAX columns, the recoveries of ACE and SAC were enhanced to 86.5% and 97.7%; however, it slightly decreased to 66.5% for NEO. The occurrence rates of ACE, SAC, and NEO in domestic sewage were 100.0%, and it was only 33.3% for ASP. The highest concentrations of four aforementioned artificial sweeteners in domestic sewage were 0.83, 4.52, 1.22, and 7.57 μg•L^-1, respectively. The highest concentrations of acesulfame, saccharin, aspartame, and neotame in source water were 22.94, 39.17, 0.73, and 8.92 μg•L^-1, respectively, and detection rates were 72.7%, 90.9%, 18.2%, and 90.9%, respectively. Most artificial sweeteners were removed by the prozone process; the removal efficiencies of ACE, SAC, and NEO ranged from 67.7% to 100.0%, and the removal efficiencies of ACE, SAC, and NEO by the advanced treatment process ranged from 73.7% to 100.0%, which effectively reduced the risk of drinking water quality. The four artificial sweeteners were not detected in the water supply network.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Water treatment Controlled terms:Efficiency - Extraction - Food additives - High performance liquid chromatography - Peptides - Phase separation - Potable water - Sewage - Sewage treatment - Sugar substitutes - Sugars - Water distribution systems - Water pollution - Water quality - Water supply Uncontrolled terms:Artificial sweeteners - Emerging pollutants - Quality safety - Quantification limit - Removal efficiencies - Solid-phase extraction - Treatment systems - Water supply networks Classification code:444 Water Resources - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 446.1 Water Supply Systems - 452.1 Sewage - 452.2 Sewage Treatment - 453 Water Pollution - 461.9 Biology - 802.3 Chemical Operations - 804.1 Organic Compounds - 822.3 Food Products - 913.1 Production Engineering Numerical data indexing:Mass_Density 1.57e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 4.70e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 7.57e-06kg/m3 to 2.20e-02kg/m3, Mass_Density 8.92e-06kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Percentage 1.82e+01%, Percentage 3.33e+01%, Percentage 6.65e+01%, Percentage 6.77e+01% to 1.00e+02%, Percentage 7.27e+01%, Percentage 7.37e+01% to 1.00e+02%, Percentage 8.65e+01%, Percentage 9.09e+01% DOI:10.13227/j.hjkx.201910084 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371246 Title:Regional Air Pollution Process in Winter over the Yangtze River Delta and Its Influence on Typical Northern Cities Title of translation:秋冬季区域性大气污染过程对长三角北部典型城市的影响 Authors:Li, Rui (1, 2); Li, Qing (2); Xu, Jian (2); Li, Liang (3); Ge, Chao-Jun (4); Huang, Ling (2); Sun, Deng-Hong (5); Liu, Zi-Yi (2); Zhang, Kun (2); Zhou, Guo-Zhu (4); Wang, Yang-Jun (2); Hu, Zi-Mei (4); Song, Yan-Xi (1); Chen, Yong-Hang (1); Li, Li (2) Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China; (3) Bengbu Municipal Bureau of Ecology and Environment, Bengbu; 233040, China; (4) Bengbu Environmental Monitoring Station, Bengbu; 233040, China; (5) Bengbu Environmental Monitoring Team, Bengbu; 233040, China Corresponding author:Song, Yan-Xi(syx@dhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1520-1534 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, we analyzed several pollution episodes that occurred in the autumn and winter of 2018-2019 using multiple methods including the hierarchical clustering analysis, backward trajectory, and potential source contribution analysis based on monitored air quality and meteorological data. Bengbu, being a representative city to the north of the Yangtze River Delta (YRD) region and located in a heavily polluted area during these two pollution processes, is the focus of this work. The results indicated that the northern part of the YRD region is affected because of unfavorable meteorological conditions such as weak ground pressure, high humidity, low temperature, low wind speeds, and regional transport. The regional pollution processes over the YRD region in the autumn and winter seasons exhibit characteristics of wide influence and long duration with mainly two types of pollution: regional transport and intra-regional accumulation. During the two selected pollution episodes, the average PM2.5 concentration in the northern YRD region reached 131.6 μg•m^-3 and 115.4 μg•m^-3, respectively. The former type had a shorter duration but exhibited rapid accumulation of pollutants in a short period of time with greater pollution intensity, wider pollution range, and deeper pollution intrusion. Qualitative and quantitative analysis of the potential sources of PM2.5 based on PSCF and CWT showed that the PM2.5 concentration during EP1 was due to transport from cities such as Linyi, Xuzhou, Suqian, and Lianyungang to the pollution trajectory. The CWT value generally exceeded 80 with the highest value near 200. In contrast, EP2 was affected by the neighboring cities such as Suqian, Suzhou, and Xuzhou, and the CWT value was over 60 with the highest approaching 160, indicating that the interaction among cities in the study area is significant. This study shows that cross-regional air pollution control strategies are particularly important for alleviating the pollution situation in the northern part of the YRD region.
© 2020, Science Press. All right reserved. Number of references:57 Main heading:River pollution Controlled terms:Air pollution control - Air quality - Atmospheric movements - Hierarchical clustering - Meteorology - Quality control - Rivers - Temperature - Trajectories Uncontrolled terms:Backward trajectory - Hierarchical clustering analysis - Meteorological condition - PM2.5 - Potential sources - Qualitative and quantitative analysis - Regional air pollution - Yangtze river delta Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 453 Water Pollution - 641.1 Thermodynamics - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.201908087 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008914 Title:Effects of Different Treatments with Water Management Combined with Leaf Spraying Silicon Fertilizer on Cd Accumulation in Rice Title of translation:不同水分管理模式联合叶面喷施硅肥对水稻Cd累积的影响 Authors:Wei, Bin-Yun (1); Zhou, Hang (1, 2); Liu, Jia-Wei (1); Zhang, Jing-Yi (1); Huang, Fang (1); Huo, Yang (1); Hu, Yu-Dan (1); Gu, Jiao-Feng (1, 2); Liu, Jun (3); Liao, Bo-Han (1, 2) Author affiliation:(1) College of Environmental 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; (3) Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area, Hengyang; 421001, China Corresponding author:Zhou, Hang(zhouhang4607@163.comemailgujiaofeng@163.com)Gu, Jiao-Feng(gujiaofeng@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3855-3861 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A field experiment involving eight treatments with water management combined with leaf spraying silicon fertilizer was conducted in a paddy field heavily contaminated with Cd (2.83 mg•kg^-1) to study the effects of these treatments on rice growth and Cd accumulation in different rice tissues. The results showed that: ① the treatments had no significant effects on rice plant height or number of tillers, but increased the biomass of brown rice by 1.7% to 25.0%. Among the eight treatments, that of water flooding during the rice maturation period plus leaf spraying silicon fertilizer (CY) resulted in the highest amount of brown rice yield. ② The treatment of conventional water management plus leaf spraying silicon fertilizer (Si) had no significant effect on the exchangeable Cd content and TCLP extractable Cd content in soil, whereas the other treatments reduced the exchangeable Cd content by 7.8%-42.6% and the TCLP extractable Cd content by 20.0%-40.8%. ③ The Si treatment could reduce the Cd content in various rice tissues, with an overall decrease of 19. 0% in brown rice. The other treatments significantly reduced the Cd content in various rice tissues. The treatment of moisture during the rice maturation period plus leaf spraying silicon fertilizer (CS) resulted in the highest reduction in the Cd content in brown rice (44. 0%), and was followed by the treatments of batch-type water flooding during the entire rice growth period plus leaf spraying silicon fertilizer (JX; 36.4%), and moisture during the rice pustulation period plus leaf spraying silicon fertilizer (GS; 31.8%). ④ For paddy-fields that are contaminated with Cd to medium and heavy levels, the CS and JX treatments are recommended to manage rice production in order to significantly reduce the Cd content of brown rice whilst having little effect on the rice yield.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Chemicals removal (water treatment) Controlled terms:Cadmium - Fertilizers - Floods - Histology - Moisture - Silicon - Tissue - Tissue engineering Uncontrolled terms:Cd accumulation - Different treatments - Field experiment - Leaf spraying - Maturation periods - Paddy fields - Rice growths - Rice production Classification code:461.1 Biomedical Engineering - 461.2 Biological Materials and Tissue Engineering - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally Numerical data indexing:Percentage 0.00e+00%, Percentage 1.70e+00% to 2.50e+01%, Percentage 2.00e+01% to 4.08e+01%, Percentage 3.18e+01%, Percentage 3.64e+01%, Percentage 7.80e+00% to 4.26e+01% DOI:10.13227/j.hjkx.202002147 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008853 Title:Effects of Chelate GLDA on the Remediation of Cadmium Contaminated Farmland by Pennisetum purpureum Schum Title of translation:螯合剂GLDA对象草修复镉污染农田的影响 Authors:Qin, Jian-Jun (1); Tang, Sheng-Shuang (1); Jiang, Kai (1); Huang, Jing (1); Hou, Hong-Bo (1, 2); Long, Jian (1, 2); Peng, Pei-Qin (1, 2) Author affiliation:(1) College of Environmental 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 author:Long, Jian(longjiancsuft@yeah.netemailpqpeng123@sina.com)Peng, Pei-Qin(pqpeng123@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3862-3869 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to clarify the effects of chelate tetrasodium glutamate diacetate (GLDA) on the remediation of cadmium (Cd) contaminated farmland by Pennisetum purpureum Schum, GLDA was applied in different methods within 60 days: total application doses of 585, 1 170, and 2 340 kg•hm^-2 were equally divided into 1-4 applications, respectively, and the time intervals of 2-4 applications were 30, 20, and 15 days, respectively. The biomass, Cd content, and amount of Cd extracted from aboveground parts of Pennisetum purpureum Schum, in addition to the pH, dissolved organic carbon (DOC) mass concentration, and other indicators in soil were analyzed. The results showed that the biomass and Cd content of the aboveground parts of Pennisetum purpureum Schum increased significantly when GLDA was applied many times at a low application dose. The number of applications and the total dose were the key factors influencing the biomass and Cd content, respectively. The highest amount of Cd extracted was 16.78 g•hm^-2 at 585 kg•hm^-2 (applied four times), which was 275.39% higher than the CK treatment (i. e., no GLDA was applied). There was significant positive correlations between the pH, mass concentration of DOC, and content of DTPA-Cd, and the total dose and number of applications. The mass concentration of DOC was the main factor affecting the DTPA-Cd content. The total Cd content in the soil (after at 585 kg•hm^-2 was applied four times) decreased by 3.23% compared with that of the soil before planting Pennisetum purpureum Schum. Therefore, the application of GLDA is of great significance for the remediation of Cd contaminated farmland by Pennisetum purpureum Schum, and the application method should be selected reasonably.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Pollution Controlled terms:Biomass - Cadmium - Chelation - Farms - Organic carbon - Soils Uncontrolled terms:Application method - Cadmiums (Cd) - Dissolved organic carbon - Mass concentration - Pennisetum purpureum - Positive correlations - Time interval - Total dose Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Age 4.11e-02yr, Percentage 2.75e+02%, Percentage 3.23e+00% DOI:10.13227/j.hjkx.202002070 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256340 Title:Microbial Community Structure for Sewage Wastewater Treatment Plants in Winter Title of translation:污水生物处理工艺低温下微生物种群结构 Authors:Shang, Yue-Fei (1, 2); Wang, Shen (3); Zong, Ni (3); Du, Hai-Zhou (4); Zhang, Xin (4); Qi, Rong (1, 2); Yang, Min (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; (3) Beijing Drainage Group Co., Ltd., Beijing; 100044, China; (4) Zhangjiakou Xishan Wastewater Treatment Co., Ltd., Zhangjiakou; 076250, China Corresponding author:Qi, Rong(qirong@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4636-4643 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Constructing an effective control strategy for the daily operation of sewage treatment plants daily operation is an important criterion for the removal performances of nutrient stable in winter. To investigate microbial community structure, functional groups, and relationships between population dynamics and effluent variation, activated sludge obtained from 4 plants, which were running stably in a low temperature period (8-15℃) in northern China, were sampled. The high-throughput sequencing results indicated that the microbial community had good richness in the low temperature period during which the abundance of Actinobacteria increased. Nitrosomonas, a key functional ammonia oxidation bacterium, was greatly affected by the decreasing temperature, while Denitrifies, a highly diverse core group with wide distribution, maintained stable abundance indicating less influence of decreasing temperature. The denitrification efficiency was only associated with the mixed liquor reflux ratio. Tetrasphaera was widely present in four processes and played an important role for the removal of biological phosphorus. Sludge bulking phenomena caused by filamentous bacteria overgrowth occurred frequently in winter; however the quality of effluents was slightly influenced.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Sewage treatment plants Controlled terms:Ammonia - Bacteria - Biological water treatment - Denitrification - Effluents - Sewage sludge - Temperature - Wastewater treatment Uncontrolled terms:Control strategies - Denitrification efficiencies - Filamentous bacteria - High-throughput sequencing - Microbial communities - Microbial community structures - Removal performance - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 641.1 Thermodynamics - 802.2 Chemical Reactions - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.202004116 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278058 Title:Profile Characteristics of VOCs from Wood and Economic Crop Burning Title of translation:薪柴和经济作物秸秆燃烧VOCs排放特征 Authors:Niu, Zhen-Zhen (1); Kong, Shao-Fei (1); Yan, Qin (1); Zheng, Shu-Rui (1); Zheng, Huang (1); Zeng, Xin (1); Yao, Li-Quan (1); Wu, Jian (1); Zhang, Ying (1); Wu, Fang-Qi (1); Cheng, Yi (1); Qin, Si (1); Liu, Xi (1); Yan, Ying-Ying (1); Qi, Shi-Hua (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 author:Kong, Shao-Fei(kongshaofei@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1107-1115 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Wood and economic crops are still widely used in rural areas of China. Although their combustion is an important source of volatile organic compounds (VOCs), study on their emission characteristics is relatively weak. In this study, three kinds of wood (poplar, cedarwood, and citrus branches) and six economic crop straws (soybean stalk, sesame stalk, corn cob, cotton stalk, peanut stalk, and corn stalk) were selected and their burning was simulated in the laboratory. A dilution tunnel system was used to dilute the smoke, and then Tedlar bags were used to collect the smoke. The compositions of 102 VOCs were analyzed by Agilent 7820A/5977E gas chromatography/mass spectrometry. The ozone formation potential (OFP) of VOCs for different types of biomass burning was analyzed. The results indicated that there are differences in the VOC compositions of different types of biomass burning emissions. Ethane (11.1%), trans-2-pentene (15.4%), ethylene (8.3%), and dichloromethane (11.9%) are the main VOCs emitted from poplar and cedarwood burning. Toluene (49.8%) is the most abundant species of VOC emitted from burning of citrus branches. Ethylene (11.8%-17.5%) and acetone (9.2%-14.7%) are the main VOCs components of straw burning. Corn stalks, peanut stalks, and citrus branches have similar VOC source profiles, with the coefficient of divergence less than 0.1. The benzene/toluene ratio for biomass burning emissions obtained in this study and in the literature is in the range of 0.030-6.48. It is arguable that a value higher than 1 indicated the impact of biomass burning. The contributions of alkenens, oxygenated VOCs, and aromatic hydrocarbons to the OFP of biomass burning were 30.6%-80.3%, 6.5%-21.0%, and 3.8%-56.5%, respectively. The components contributing more than 10.0% to the OFP are ethylene, propylene, trans-2-pentene, cis-2-pentene, toluene, and propionaldehyde.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Biomass Controlled terms:Acetone - Aliphatic compounds - Benzene - Crops - Dichloromethane - Ethylene - Gas chromatography - Oilseeds - Ozone - Smoke - Toluene - Volatile organic compounds Uncontrolled terms:Biomass burning emissions - Biomass-burning - Emission characteristics - Gas chromatography/Mass spectrometry - Ozone formation potentials - Propionaldehyde - Source profiles - Soybean stalks Classification code:802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 8.30e+00%, Percentage 9.20e+00% to 1.47e+01%, Percentage 1.11e+01%, Percentage 1.18e+01% to 1.75e+01%, Percentage 1.19e+01%, Percentage 1.54e+01%, Percentage 3.06e+01% to 8.03e+01%, Percentage 3.80e+00% to 5.65e+01%, Percentage 4.98e+01% DOI:10.13227/j.hjkx.201909071 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517743 Title:Characteristics and Source Apportionment of VOCs and O3 in Shijiazhuang Title of translation:石家庄市挥发性有机物和臭氧的污染特征及源解析 Authors:Wang, Shuai (1); Cui, Jian-Sheng (1); Feng, Ya-Ping (1); Liu, Da-Xi (1); Chen, Jing (2); Tian, Liang (1); Feng, Chao (1); M.-X., Wang; X.-C., Wang; T.-T., Wang Author affiliation:(1) School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China; (2) Shijiazhuang Meteorological Bureau, Shijiazhuang; 050081, China; (3) College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China Corresponding author:Cui, Jian-Sheng(cui1603@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5325-5335 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the composition characteristics and sources of volatile organic compounds (VOCs) in Shijiazhuang City, three national control points were selected to conduct VOCs sampling and analysis from March 2017 to January 2018. The correlation of VOCs through combination with meteorological and ground-level O3 data, and the sources of VOCs were analyzed by positive matrix factorization (PMF). To quantify the pollution period of O3 in summer, its temporal sequence characteristics were studied by wavelet analysis. During the sampling period, the average concentration of ambient total VOCs (TVOCs) was (137.23±64.62) μg•m^-3. Haloalkanes were the most dominant VOC compounds, accounting for 31.77% of total VOCs mass, followed by aromatic (30.97%) and oxygenated VOCs (OVOCs, 23.76%). The seasonal variation in VOC concentration followed the trend in winter (187.7 μg•m^-3)>autumn (146.8 μg•m^-3)>spring (133.24 μg•m^-3)>summer (107.1 μg•m^-3); the concentration of VOCs shows a trend of increasing gradient from west to east. The O3 concentration correlated negatively with VOCs and NO2, and positively with temperature, sunshine duration, wind speed, and visibility. Changes in meteorological elements were concerned before the occurrence of ozone pollution in summer, especially in 4-5 days in June and 7-8 days during July to August after the occurrence of increasing temperature. Finally six potential sources of VOCs were quantified by the PMF model, including from gasoline emissions (24.78%), diesel vehicle emissions (24.69%), solvent usage (18.64%), the chemical industry (11.87%), regional background (10.84%), and the pharmaceutical industry (9.17%). Ozone formation potential (OFP) contribution of emission sources of gasoline and diesel vehicles (54.98%) was over half of the total contribution. Meanwhile, these findings illustrated that control of vehicle emissions and industrial sources would be an important way to reduce VOCs concentrations and improve air quality in Shijiazhuang.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Quality control Controlled terms:Air quality - Chemical industry - Diesel engines - Diesel locomotives - Factorization - Gasoline - Industrial emissions - Ozone - Vehicles - Volatile organic compounds - Wind Uncontrolled terms:Average concentration - Composition characteristics - Increasing temperatures - Meteorological elements - Ozone formation potentials - Pharmaceutical industry - Positive Matrix Factorization - Source apportionment Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 523 Liquid Fuels - 612.2 Diesel Engines - 682.1.2 Locomotives - 804 Chemical Products Generally - 804.1 Organic Compounds - 805 Chemical Engineering, General - 913.3 Quality Assurance and Control - 921 Mathematics Numerical data indexing:Age 1.10e-02yr to 1.37e-02yr, Age 1.92e-02yr to 2.19e-02yr, Percentage 1.08e+01%, Percentage 1.19e+01%, Percentage 1.86e+01%, Percentage 2.38e+01%, Percentage 2.47e+01%, Percentage 2.48e+01%, Percentage 3.10e+01%, Percentage 3.18e+01%, Percentage 5.50e+01%, Percentage 9.17e+00% DOI:10.13227/j.hjkx.202005302 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517643 Title:Emission Inventory and Emission Factors of Volatile Organic Compounds (VOCs) from Architectural Adhesives Title of translation:建筑胶黏剂使用VOCs排放系数与排放清单 Authors:Liang, Xiao-Ming (1); Sun, Xi-Bo (2); Su, Yan-Hua (1); Huang, Li-Hai (3); Chen, Feng (3); Ren, Lu (1); Lu, Qing (1); Lai, Jun-Yi (1); Chen, Peng-Long (1); Chen, Lai-Guo (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou; 510655, China; (2) Guangdong Provincial Academy of Environmental Sciences, Guangzhou; 510045, China; (3) Lianzhou Environmental Monitoring Station, Qingyuan; 513400, China Corresponding author:Chen, Lai-Guo(chenlaiguo@scies.org) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5345-5351 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Architectural decoration is an important anthropogenic emission source of VOCs in China, and there are few studies on the emission of VOCs from architectural adhesives. In this study, the VOCs content level and emission factors of various architectural adhesives were measured and then, a VOC emission inventory of architectural adhesives in China from 2013 to 2017 was established by a top-down emission factor method. Results showed that the comprehensive VOCs emission factor of architectural adhesives was 97.0 kg•t^-1, of which 543 kg•t^-1 was from solvent-based architectural adhesives, 45 kg•t^-1 was from water-based architectural adhesives, and 63 kg•t^-1 was from bulk architectural adhesives. The VOCs emissions from architectural adhesives were 165 kt, 181 kt, 188 kt, 201 kt, and 219 kt from 2013 to 2017 in China. The contribution of VOCs emission of various disparate architectural adhesives was 25.5%, 23.6%, and 50.9% for water-based, bulk, and solvent-based types, respectively. Shandong, Jiangsu, Zhejiang, Sichuan, Guangdong, Henan, Yunnan, and Fujian provinces contributed significant amounts, with a total emission of 120 kt in 2017, accounting for nearly 55% of the total VOCs emission for architectural adhesives.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Adhesives Controlled terms:Architectural design - Volatile organic compounds Uncontrolled terms:Anthropogenic emissions - Content level - Emission factors - Emission inventories - Fujian Province - Solvent based - Total emissions - VOC emissions Classification code:402 Buildings and Towers - 804.1 Organic Compounds Numerical data indexing:Percentage 2.36e+01%, Percentage 2.55e+01%, Percentage 5.09e+01%, Percentage 5.50e+01% DOI:10.13227/j.hjkx.202004266 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990443 Title:Emission Inventory of Intermediate Volatility Organic Compounds from Vehicles in the Yangtze River Delta in 2017 and the Impact on the Formation Potential of Secondary Organic Aerosols Title of translation:长江三角洲2017年机动车IVOCs排放清单构建及其对SOA的生成影响 Authors:Wang, Qian (1); Huang, Ling (1); Wang, Yang-Jun (1); Yin, Si-Jia (1); Zhang, Qi (2); Yi, Xin (2); Li, Li (1) Author affiliation:(1) Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China; (2) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China Corresponding author:Huang, Ling(linghuang@shu.edu.cnemailyjwang326@shu.edu.cn)Wang, Yang-Jun(yjwang326@shu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:125-132 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Intermediate volatility organic compounds (IVOCs) have a significant contribution to the formation of secondary organic aerosols (SOA) in the atmosphere, but are not included in the current emission inventory. In this study, IVOC emissions from vehicles are estimated for the Yangtze River Delta region (YRD) for 2017 based on two methods: the emission factor method and the IVOCs/POA scaling factor method. Uncertainties in the estimated IVOCs emissions and the impact on their potential formation are discussed. The results based on the emission factor method showed that the total vehicular IVOCs emission in the YRD in 2017 was 35800 tons, and that the formation potential of SOA was an estimated 695 tons. IVOCs emissions from trucks accounted for>70% of total IVOCs emissions in most cities in the YRD region. In terms of fuel type, IVOCs emissions from diesel vehicles were much higher than of those from gasoline vehicles. Results based on the IVOCs/POA scaling factor method showed that the emissions calculated by different combinations of IVOCs/POA ratios and POA/PM2.5 ratios that could vary significantly, with a maximum of 64.2×10⁴ tons and a minimum of just 5.2×10⁴ tons. The resultant SOA formation potential was 1.55×10⁴ tons and 1032 tons for the maximum and minimum, respectively. This study shows that the results of IVOCs emissions based on different estimation methods are associated with large uncertainties, which could directly affect the simulation results of SOA in subsequent air quality models. Therefore, it is necessary to use different inventory results in air quality models and perform model evaluation of SOA in order to obtain more accurate IVOCs emission inventories of vehicles in the YRD region.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Vehicles Controlled terms:Aerosols - Air quality - Organic compounds - Quality assurance - Uncertainty analysis Uncontrolled terms:Air quality models - Current emissions - Emission factors - Emission inventories - Estimation methods - Formation potential - Secondary organic aerosols - Yangtze river delta Classification code:451.2 Air Pollution Control - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 922.1 Probability Theory Numerical data indexing:Mass 3.25e+07kg, Mass 6.30e+05kg, Mass 9.36e+05kg DOI:10.13227/j.hjkx.201907178 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796386 Title:Removal of Urea by Heterotrophic Nitrification-Aerobic Denitrification Mixed Strains and Effects of Heavy Metals and Salinity Title of translation:异养硝化-好氧反硝化混合菌对尿素的去除及重金属和盐度的影响 Authors:Wang, Meng-Meng (1); Cao, Gang (1); Zhang, Di (1); Feng, Nai-Xian (2); Pan, Yong-Zhang (1) Author affiliation:(1) School of Environment, Jinan University, Guangzhou; 511443, China; (2) Guangdong Engineering Center for Environment Contamination Control and Restorative Materials, Guangzhou; 510630, China Corresponding author:Cao, Gang(cao_g@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2787-2795 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the effect of heterotrophic nitrification-aerobic denitrification mixed strains on urea removal, the removal characteristics of urea and effects of heavy metals and salinity on urea removal by mixed strains (DM01+YH01+YH02) were investigated. The results showed that urea could be efficiently degraded by mixed strains at 24 h in 200.0 mg•L^-1 urea wastewater when the carbon source was sodium citrate, C/N was 10, temperature was 30℃, pH was 7, and rotation speed was 130 r•min^-1. Heavy metal ions (Ni²⁺, Cd²⁺, Cu²⁺, and Zn²⁺) can reduce the removal efficiency of urea by mixed strains, and the degree of influence was Cd²⁺>Cu²⁺>Ni²⁺>Zn²⁺. Fe²⁺ (<20.0 mg•L^-1) in urea wastewater can enhance the removal efficiency of urea by mixed strains. Furthermore, a salinity of more than 10.0 mg•L^-1 in urea wastewater can reduce the removal efficiency of urea by mixed strains.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Urea Controlled terms:Denitrification - Efficiency - Heavy metals - Metabolism - Metal ions - Nitrification - Sodium compounds Uncontrolled terms:Carbon source - Heterotrophic nitrification-aerobic denitrifications - Mixed strain - Removal characteristics - Removal efficiencies - Rotation speed - Sodium citrate - Urea removals Classification code:531 Metallurgy and Metallography - 531.1 Metallurgy - 802.2 Chemical Reactions - 804.1 Organic Compounds - 913.1 Production Engineering Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e-01kg/m3 to 2.20e-02kg/m3, Time 8.64e+04s DOI:10.13227/j.hjkx.201911116 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517656 Title:Remediation Performance via the Passivation of a Porous Biomorph Genetic Composite of α-Fe2O3/Fe3O4/C Using a Bamboo Template on As(Ⅴ) Contaminated Soils Title of translation:毛竹遗态Fe/C复合材料对As(Ⅴ)污染土壤的钝化修复性能 Authors:Zhao, Ning-Ning (1, 2); He, Hao (2, 3); Feng, Guo-Jie (4); Zhu, Zong-Qiang (1, 2, 3); Fang, Ya-Li (1, 2); Li, Chao (5); Zhu, Yi-Nian (1, 2); Zhang, Li-Hao (2, 3) Author affiliation:(1) Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin; 541004, China; (2) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin; 541004, China; (3) Technical Innovation Center of Mine Geological Environmental Restoration Engineering in Southern Karst Area, Ministry of Natural Resources, Nanning; 530022, China; (4) Beijing GeoEnviron Engineering & Technology, Inc, Beijing; 100095, China; (5) Chongqing Tongnan District Water Resources Protection and Utilization Center, Chongqing; 402660, China Corresponding author:Zhu, Zong-Qiang(zhuzongqiang@glut.edu.cnemailzhuyinian@glut.edu.cn)Zhu, Yi-Nian(zhuyinian@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5600-5608 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Red soil from Guangxi, China was selected as the background soil, and a porous biomorphic genetic composite of α-Fe2O3/Fe3O4/C comprising a bamboo template (PBGC-Fe/C) was used as a passivator to remediate As(Ⅴ) contaminated soils. The performance of PBGC-Fe/C was characterized by Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FT-IR). The results showed that PBGC-Fe/C could improve the passivation effect of As(Ⅴ) from the contaminated soils compared with a single passivation material. Under the conditions of a 5% dose addition, 25% water content, and particle size of 100 mesh, the stability rates of PBGC-Fe/C on As(Ⅴ) contaminated soils with different concentrations of 500 mg•kg^-1and 1 000 mg•kg^-1 could reach 80.95% and 73.49%, respectively. The porous biomorphic genetic composite of bamboo charcoal provided a large number of adsorption sites for As(Ⅴ), and the acidity of the soil was favorable for the remediation of As(Ⅴ) via passivation. Moreover, PBGC-Fe/C could not only adsorb and fix As(Ⅴ), but also promoted the stabilization of As species. Chemical complexation and ion exchange played major roles in this passivation process.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Soil pollution Controlled terms:Bamboo - Charcoal - Contamination - Fourier transform infrared spectroscopy - Hematite - Ion exchange - Iron metallography - Particle size - Passivation - Remediation - Scanning electron microscopy - Soils Uncontrolled terms:Adsorption site - Bamboo charcoal - Contaminated soils - Fourier transform infra red (FTIR) spectroscopy - Passivation effect - Passivation materials - Passivation process - Stability rate Classification code:454.2 Environmental Impact and Protection - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 524 Solid Fuels - 531.2 Metallography - 539.2.1 Protection Methods - 801 Chemistry - 802.2 Chemical Reactions - 811.1 Pulp and Paper Numerical data indexing:Percentage 2.50e+01%, Percentage 5.00e+00%, Percentage 7.35e+01%, Percentage 8.10e+01% DOI:10.13227/j.hjkx.202004064 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371250 Title:Response of Nitrogen Loss Flux in Purple Soil Sloping Field to Reduced Fertilizer and Combining Straw Title of translation:紫色土旱坡地氮流失通量对减肥配施秸秆的响应 Authors:Xiong, Zi-Yi (1); Wang, Zi-Fang (1); Long, Yi (2); Yan, Dong-Chun (2); Xu, Guo-Xin (1); Gao, Ming (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:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1930-1940 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The purple soil sloping field is considered as the main source of sediment and non-point source pollution in the Three Gorges Reservoir area. To prevent and control the non-point source pollution, it is indispensable to explore the characteristics of nitrogen loss in the overland flow and interflow of purple soil sloping field in Three Gorges Reservoir area. The purple soil sloping runoff plots, located in the Shibaozhai Experimental Station of Chengdu Institute of Chinese Academy of Sciences in Zhongxian County, Chongqing, were studied. The experiment included no fertilization treatment (CK), traditional fertilization treatment (T1), amended fertilization treatment (T2), and reduced fertilizer with straw treatment (T3). According to the data of volume of the interflow and runoff and the leach concentration and flux of nitrogen forms under rapeseed-maize rotation system, the response of nitrogen leaching flux to reduce fertilizer with straw application can be definite in purple soil sloping plots. The results show that the ratio of interflow to total runoff is 60.14%-88.56%, and the flux of nitrogen leaching in the interflow accounts for 72.88%-92.35% of total nitrogen loss flux. Ammonium was mainly leached by the overland flow. In addition, nitrate was mainly leached by the interflow and was the main form of nitrogen leaching. The fluxes of ammonium and nitrate under different treatments followed the order T1>T2>T3>CK. The total nitrogen flux of T3 was 20.07 kg•(hm²•a)^-1, which was 43.59% and 39.55% lower than that of T1 and T2, respectively. The reduced fertilizer with straw application significantly decreased the leaching flux of ammonium, nitrate, and total nitrogen, and weakened the effect on runoff nitrogen leaching in the purple soil sloping plots.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Soil pollution Controlled terms:Agricultural runoff - Leaching - Nitrates - Nitrogen fertilizers - Soil pollution control - Soils - Straw Uncontrolled terms:Chinese Academy of Sciences - Different treatments - Experimental stations - Interflow - Non-point source pollution - Overland flow - Sloping fields - Three gorges reservoir area Classification code:483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.5 Agricultural Wastes Numerical data indexing:Percentage 3.95e+01%, Percentage 4.36e+01%, Percentage 6.01e+01% to 8.86e+01%, Percentage 7.29e+01% to 9.23e+01% DOI:10.13227/j.hjkx.201910002 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796312 Title:Performance and Membrane Fouling Characteristics of Mariculture Wastewater Treated by Anoxic MBR-MMR Title of translation:缺氧MBR-MMR处理海水养殖废水性能及膜污染特性 Authors:Chen, Fan-Yu (1); Xu, Zhong (1); You, Hong (1, 2); Liu, Feng (1); Li, Zhi-Peng (1); Chen, Qi-Wei (3); Han, Hong-Wei (4) Author affiliation:(1) School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai; 264200, China; (2) State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin; 150090, China; (3) PAN-CHINA Construction Group Co., Ltd., Hunan Branch, Changsha; 410000, China; (4) Ji'nan Environmental Monitoring Center, Ji'nan; 250102, China Corresponding author:Li, Zhi-Peng(lizhipengcn@hit.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2762-2770 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An anoxic membrane bioreactor-microalgae membrane reactor coupling system (anoxic MBR-MMR) was used to deal with mariculture wastewater. Pre-anoxic MBR was used for the degradation of organic matter, NO3^--N and NO2^--N, and the released NH4⁺-N entered MMR for microalgae growth and was removed. Meanwhile, the treatment efficiency and the microalgae recovery were studied, and the membrane fouling behavior was investigated. After running for 91 days, the removal rates of the system toward NO3^--N and NH4⁺-N were stable at above 90.0% and 88.0%, respectively. Furthermore, the average removal rates of PO4^3--P and TOC were 49.4% and 84.7%, respectively. Under the condition that the microalgae were harvested continuously, the biomass can be stably operated at an average concentration of 9×10⁷ cells•mL^-1 and good removal efficiency and resource utilization could be achieved. Through infrared spectrum and three-dimensional fluorescence spectrum analysis, the main substances causing membrane fouling in MMR were tryptophan proteins and humic acids. The membrane fouling in MMR was lighter than that in anoxic MBR.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Membranes Controlled terms:Algae - Amino acids - Bioreactors - Efficiency - Marine biology - Membrane fouling - Microorganisms - Spectrum analysis - Wastewater treatment Uncontrolled terms:Average concentration - Fouling characteristics - Infrared spectrum - Membrane bioreactor - Removal efficiencies - Resource utilizations - Three-dimensional fluorescence spectra - Treatment efficiency Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.8 Biotechnology - 461.9 Biology - 804.1 Organic Compounds - 913.1 Production Engineering - 951 Materials Science Numerical data indexing:Age 2.49e-01yr, Percentage 4.94e+01%, Percentage 8.47e+01%, Percentage 8.80e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.201910057 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658380 Title:Distribution, Sources, and Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) in Tributary Waters of the Lower Reaches of the Yangtze River, China Title of translation:长江下游支流水体中多环芳烃的分布及生态风险评估 Authors:Jia, Tian-Qi (1, 2); Lei, Rong-Rong (2); Wu, Xiao-Lin (2); Ni, Tao-Tao (2); Sun, Shu-Rui (2); Guo, Wei (1); Liu, Wen-Bin (2, 3) Author affiliation:(1) Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, College of Ecology and Environment, Inner Mongolia University, Hohhot; 010021, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Guo, Wei(ndguowei@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2221-2228 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The lower reaches of the Yangtze River are a typical gathering place of chemical industrial parks in China. Polycyclic aromatic hydrocarbons (PAHs) emitted in the production process of chemical enterprises enter the tributary water body through atmospheric deposition and surface runoff, and finally merge into the Yangtze River. In this study, the distribution characteristics, source analysis, and ecological risk assessment of PAHs in a series of typical water samples collected in the tributary waters of the Yangtze River were studied. PAH monomers in the samples were mainly low-ring. The total concentration of PAHs was in the range of 37.27 to 285.88 ng•L^-1 with a mean value of 78.31 ng•L^-1, while the monomer concentration of PAHs ranged from 0 to 61.35 ng•L^-1. The lowest detection rate was benzo [k] fluoranthene and benzo [a] pyrene at 75%. As a toxic PAH monomer, the concentration of benzo [a] pyrene ranged from 0 to 11.08 ng•L^-1. According to "Water Quality Standards for Drinking Water Sources (CJ 3020-1993)" of China, the concentration of benzo [a] pyrene in a water sample (S12) located near Wuxi City exceeded the limit of drinking water standards (10 ng•L^-1). Compared with the total concentration of PAHs in rivers in some typical regions of the world, the concentration of PAHs in this study was generally at low to moderate levels. According to the source analysis results of the ratio method and principal component analysis, the concentration of PAHs in water was mainly affected by fossil combustion, automobile exhaust, and chemical emissions. To assess the potential ecosystem risk of PAHs in the investigated area, the risk quotient (RQ) was used. In addition to the DBA monomer, the relative quantities (RQs) (replication) of the remaining monomers were greater than 1, and the RQ (MPCs) values in all the monomers were less than 1, indicating that the ecological risk of water samples was at a medium level. From the perspective of long-term environmental exposure, appropriate control measures should be considered to prevent further pollution. The results can provide reference for PAH risk assessment and pollution control of chemical industrial parks in the lower reaches of the Yangtze River.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:River pollution Controlled terms:Chemical analysis - Meteorological problems - Mineral oils - Monomers - Pollution control - Potable water - Pyrene - Risk assessment - Rivers - Water quality Uncontrolled terms:Atmospheric depositions - Chemical industrial park - Distribution characteristics - Drinking water sources - Drinking water standards - Ecological risk assessment - Polycyclic aromatic hydrocarbons (PAHS) - Water quality standard Classification code:443.1 Atmospheric Properties - 444 Water Resources - 445.2 Water Analysis - 453 Water Pollution - 513.3 Petroleum Products - 804 Chemical Products Generally - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 1.11e-08kg/m3, Mass_Density 0.00e+00kg/m3 to 6.14e-08kg/m3, Mass_Density 1.00e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 3.73e-08kg/m3 to 2.86e-07kg/m3, Mass_Density 7.83e-08kg/m3 to 2.20e-02kg/m3, Percentage 7.50e+01% DOI:10.13227/j.hjkx.201911123 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070243 Title:Heavy Metal Contents in Animal Manure in China and the Related Soil Accumulation Risks Title of translation:我国畜禽粪便重金属含量特征及土壤累积风险分析 Authors:Mu, Hong-Yu (1); Zhuang, Zhong (1); Li, Yan-Ming (1); Qiao, Yu-Hui (1); Chen, Qing (1); Xiong, Jing (2); Guo, Li-Li (2); Jiang, Rong-Feng (1); Li, Hua-Fen (1) Author affiliation:(1) Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China; (2) National Engineering Laboratory for Site Remediation Technologies, Beijing; 100015, China Corresponding author:Li, Hua-Fen(lihuafen@cau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:986-996 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The environmental risks posed by heavy metals (HMs) in animal manure are increasing because of the use of trace metals as additives in feedstuffs. Manure samples were collected, and published literature was reviewed in this study to systematically analyze the HMs content in animal manure and compare the results to different sources of animal manures. Results show that the distribution of HMs content in animal manure was skewed. The ranges were between not detected (ND)-147 mg•kg^-1 for Cd, ND-1 919 mg•kg^-1 for Pb, 0.003-2 278 mg•kg^-1 for Cr, ND-978 mg•kg^-1 for As, ND-103 mg•kg^-1 for Hg, ND-1 747 mg•kg^-1 for Cu, ND-11 547 mg•kg^-1 for Zn, and 1. 22-1 140 mg•kg^-1 for Ni. The means (medians) of those elements were 2. 31(0.72) mg•kg^-1, 13.5(8.96) mg•kg^-1, 36.3(12. 0) mg•kg^-1, 14. 0(3. 52) mg•kg^-1, 0.97(0.07) mg•kg^-1, 282(115) mg•kg^-1, 656(366) mg•kg^-1, and 21.8 (13.1) mg•kg^-1 for Cd, Pb, Cr, As, Hg, Cu, Zn, and Ni, respectively. Means were significantly higher (1-13 times) than the medians. According to maximum limits of Cd, Pb, Cr, As, and Hg for organic fertilizers NY 525-2012, about 12.3% (for Cd), 2.58% (for Pb), 2.76% (for Cr), 20.6% (for As), and 3.69% (for Hg) of the data were above the limits. According to the composting regulations of Germany, about 53.9% (for Cu), 45.7% (for Zn), and 0.59% (for Ni) exceeded the maximum limits. The heavy metal contents in animal manure of different regions differs significantly. As and Cd contents in animal manure in the Shandong Province tend to be higher with their average values at 1.7 times and 10.1 times of the mean contents for national scale, respectively; the heavy metal contents in eastern China tend to be higher. Cd and As contents in animal manure tend to be higher in Northeast and Eastern China, while Cu and Zn contents were higher in Eastern and South China. After comparing HMs content in different sources of manures, we found that Cd, As, Hg, Cu, Zn, and Ni mean contents in pig manure were 1.0-3.0 times, 1.8-6.8 times, 1.1-15.8 times, 4.9-17.5 times, 2.7-12.0 times, and 1.7-2.1 times that of cattle manure, sheep manure, and poultry manure. The Pb content in poultry manure was the highest, with the mean being 2.8, 2.5, and 2.2 times higher than pig manure, cattle manure, and sheep manure, respectively. When recycling animal manure into the crop field, the accumulation rates for Cd were under 0.02 mg•(kg•a)^-1 in over 90% of the circumstances and the accumulation rates for Pb were all below 0.15 mg•(kg•a)^-1. When applying poultry manure, Cr in soil is easily accumulated with the maximum accumulation rate of 0.28 mg•(kg•a)^-1.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Manures Controlled terms:Additives - Agriculture - Cadmium - Cadmium compounds - Chromium compounds - Fertilizers - Heavy metals - Lead - Mammals - Soils - Spatial distribution - Trace elements Uncontrolled terms:Accumulation rates - Content analysis - Environmental risks - Farmland soils - Heavy metal contents - Livestock manure - Organic fertilizers - Soil accumulations Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 546.1 Lead and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes - 921 Mathematics Numerical data indexing:Percentage 1.23e+01%, Percentage 2.06e+01%, Percentage 2.58e+00%, Percentage 2.76e+00%, Percentage 3.69e+00%, Percentage 4.57e+01%, Percentage 5.39e+01%, Percentage 5.90e-01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.201903078 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278105 Title:Producing Coefficients and Emission Coefficients of Volatile Organic Compounds from the Automobile Manufacturing Industry in Zhejiang Province Title of translation:浙江省汽车整车制造行业挥发性有机物产排污系数 Authors:Teng, Fu-Hua (1); Yang, Zhong-Ping (1); Dong, Shi-Bi (1); Fu, Chao (1); Miao, Xiao-Ping (1); Gu, Zheng-Yu (1) Author affiliation:(1) Zhejiang Province Academy of Environmental Science, Hangzhou; 310007, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1093-1098 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Four typical automobile manufacturing enterprises in Zhejiang Province were selected to determine the main production and emission links of volatile organic compounds (VOCs) in this industry by analyzing their production processes and the main raw and auxiliary materials used. Two of them were monitored on the spot, and the producing coefficients and emission coefficients of the VOCs discharged from the automobile manufacturing industry in Zhejiang Province were calculated. Then, the production and emission of VOCs in this industry in 2017 in Zhejiang Province were estimated. The results show that the main production and emission links of VOCs in the automobile manufacturing industry in Zhejiang Province are coating processes. Only a few of the automobile manufacturers in Zhejiang Province can deal with the paint exhaust gas effectively at present; in addition to coatings, solvent-based cleaning agents are also one of the main sources of VOCs in this industry. The VOC producing coefficients of the automobile manufacturing industry in Zhejiang Province are 0.20 t•t^-1, 3.92 kg•vehicle^-1, and 29.36 g•m^-2; the emission coefficients are 0.13 t•t^-1, 2.63 kg•vehicle^-1, and 19.72 g•m^-2. The quantity of VOCs generated by this industry in 2017 was 2 425.84 t, while the quantity of emissions was 1 627.54 t.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Automotive industry Controlled terms:Automobile manufacture - Automobiles - Coatings - Gas chromatography - Volatile organic compounds Uncontrolled terms:Automobile manufacturers - Automobile manufacturing - Automobile manufacturing enterprise - Auxiliary materials - Emission coefficient - Producing coefficient - Production process - Zhejiang Province Classification code:662.1 Automobiles - 802.3 Chemical Operations - 804.1 Organic Compounds - 813.2 Coating Materials DOI:10.13227/j.hjkx.201906015 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070844 Title:Removal Performance of Antibiotic Resistance Genes and Heavy Metal Resistance Genes in Municipal Wastewater by Magnetic-Coagulation Process Title of translation:磁混凝对市政污水中抗生素抗性基因和重金属抗性基因的削减效能 Authors:Yu, Wen-Chao (1, 2); Zheng, Li-Bing (1, 2); Wei, Yuan-Song (1, 2, 3); Wang, Zhe-Xiao (4); Zhang, He-Qing (4); Huang, Guang-Hua (4); Jiao, Yun-Yi (1, 2); Wu, Zhen-Jun (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) Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Huanneng Technology Co., Ltd., Beijing; 100085, China Corresponding author:Wei, Yuan-Song(yswei@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:815-822 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Antibiotic resistance genes (ARGs) in municipal wastewater pose a potential threat to the environment. In this study, the change in absolute and relative abundance of ARGs, metal resistance genes (MRGs), and mobile genetic elements (MGTs) were investigated during an emergent municipal wastewater treatment by the magnetic separation process. Results indicate that all the concentrations of targeted ARGs, MRGs, and MGTs decreased significantly in the primary and secondary stirring tank. However, the absolute abundance of some ARGs and MRGs increased in the effluent, which is likely caused by the presence of ample MGTs, in the order of int1 (2.00×10¹⁰ copies•mL^-1)>int2 (1.91×10⁸ copies•mL^-1)> Tn916/1545^e(5.38×10⁸ copies•mL^-1). The results obtained from network and PCA analysis showed that the removal of ARGs and MRGs were significantly associated with variations in the microbial community and common pollutants in urban wastewater, such as suspended solids, phosphorus, and COD, which are important factors for affecting the removal efficiency of antibiotic resistance genes and metal heavy resistance genes. These results show that magnetic separation can effectively reduce common pollutants in urban wastewater and might further restrict the transmission and transfer of ARGs. Moreover, it is necessary to strengthen the subsequent management of magnetic separation effluent and dehydrated sludge by disinfection technologies to lessen the risk of antimicrobial contamination.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Chemicals removal (water treatment) Controlled terms:Antibiotics - DNA - Effluents - Genes - Heavy metals - Magnetic separation - Microorganisms - Pollution - Wastewater treatment Uncontrolled terms:Antibiotic resistance genes - Genetic elements - Heavy metal resistance - Magnetic coagulations - Microbial communities - Municipal wastewater treatment - Municipal wastewaters - Sludge Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 461 Bioengineering and Biology - 531 Metallurgy and Metallography - 701.2 Magnetism: Basic Concepts and Phenomena DOI:10.13227/j.hjkx.201907078 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952751 Title:Quantitative Evaluation of Human Health Risk of Heavy Metals in Soils Based on Positive Matrix Factorization Model and Geo-statistics Title of translation:基于PMF模型及地统计的土壤重金属健康风险定量评价 Authors:Han, Lin (1); Xu, Xi-Bo (2) Author affiliation:(1) Shandong Geological Engineering Investigation Institute, Ji'nan; 250014, China; (2) College of Geography and Environment, Shandong Normal University, Ji'nan; 250358, China Corresponding author:Xu, Xi-Bo(xu_xibo@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5114-5124 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The aim of this study was to quantitatively assess the human health risks derived from different exposure paths of heavy metals in the soil. Zhangqiu county was selected as the study area, and 425 soil samples were collected to measure the As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn contents. A descriptive statistical method was used to assess the heavy metal pollution status of the soils, and the quantitative sources for human health were then determined based on positive matrix factorization (PMF) and geo-statistical techniques. The results show that the contents of As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn in the soils exceed background values, but do not exceed the risk screening values, indicating that there is slight heavy metals pollution in the soil. The sources of heavy metals in the soil can be divided into three categories. The spatial distribution of Cr and Ni is approximately the same, is similar to the spatial distribution trend of parent materials, and belongs to natural sources. Cd, Cu, and Zn are controlled by transportation. The spatial distribution is significantly affected by the location of road lines. The hot spot areas of Hg, Pb, and As correspond to the locations of the industrial park and the urban area. Industrial emissions and coal combustion increase the accumulation of Hg in the soil, and As, Pb, and Hg are classified as industrial sources. The contribution rate of industrial source is 41.85%, with transportation sources and natural sources being 33.79% and 24.36%, respectively. The non-carcinogenic and carcinogenic risks under the exposure paths of hand, breathing, and skin are within the acceptable level. For children, the sources of heavy metals with the largest carcinogenic (36.53%) and non-carcinogenic (36.01%) risks are industrial sources. However, transportation is the largest source of carcinogenic (34.98%) and non-carcinogenic (37.06%) risk for adults. Differential avoidance of heavy metal sources and exposure pathways is vital to reducing human health risks.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Soil pollution Controlled terms:Coal combustion - Factorization - Health - Health risks - Heavy metals - Industrial emissions - Matrix algebra - Risk assessment - Soils - Spatial distribution Uncontrolled terms:Heavy metal pollution - Heavy metals in soil - Heavy metals pollution - Human health risks - Positive Matrix Factorization - Positive matrix factorization models - Quantitative evaluation - Statistical techniques Classification code:451.1 Air Pollution Sources - 461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics - 921.1 Algebra Numerical data indexing:Percentage 2.44e+01%, Percentage 3.38e+01%, Percentage 3.50e+01%, Percentage 3.60e+01%, Percentage 3.65e+01%, Percentage 3.71e+01%, Percentage 4.19e+01% DOI:10.13227/j.hjkx.202004081 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278118 Title:Remote Sensing Monitoring on Spatial Differentiation of Suspended Sediment Concentration in a River-Lake System Based on Sentinel-2 MSI Imaging: A Case for Shengjin Lake and Connected Yangtze River Section in Anhui Province Title of translation:基于Sentinel-2 MSI影像的河湖系统水体悬浮物空间分异遥感监测:以安徽省升金湖与连接长江段为例 Authors:Wang, Hang-Hang (1, 2); Wang, Jie (1, 2); Cui, Yu-Huan (3) Author affiliation:(1) School of Resources and Environmental Engineering, Anhui University, Hefei; 230601, China; (2) Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, Anhui University, Hefei; 230601, China; (3) School of Science, Anhui Agricultural University, Hefei; 230036, China Corresponding author:Wang, Jie(wangjie@ahu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1207-1216 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Carrying out monitoring of suspended sediment concentration in river and lake systems is of great significance for understanding the laws of sediment transport in water and formulating policies on water environmental control. Taking Shengjin Lake and the connected Yangtze river section in Anhui province as the study area, band reflectance of a Sentinel-2 MSI sensor is simulated according to field spectral datasets, and the retrieval model is established by statistical regression from the synchronized suspended sediment concentration measurements. Then, the retrieved results from 28 scene MSI images during 2017-2019 are used to analyze the spatiotemporal variation of suspended sediment concentration in rivers and lakes, and the influence of water level variation on their spatial differentiation is also discussed. The results show that: ① The retrieval model established by the ratio of the sixth band to the third band of the MSI sensor is suitable for high-turbidity water type, with high accuracy (R²=0.863, RMSE=22.211 mg•L^-1). ② Spatially, the suspended sediment concentration near the lake entrances, northwestern parts of the upper and middle lake areas, and the lower lake is relatively higher, and that of Shengjin Lake is lower than that of the Yangtze River overall except for in summer. Temporally, the suspended sediment concentration in Shengjin Lake is relatively lower in summer and higher in other seasons, while the connected Yangtze River section exhibits the opposite intra-annual variation. ③ The water level, which is caused by the connectivity of rivers and lakes under the influence of the sluice, is the key factor affecting the spatial differentiation of suspended sediment concentration in the river and lake system. The suspended sediment concentration in Shengjin Lake contributes to the Yangtze River in dry and normal water periods, and that in the normal water period is more significant. In contrast, during the flood period, the correlation between suspended sediment concentration in the Yangtze River and that in Shengjin Lake is not obvious.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Suspended sediments Controlled terms:Environmental management - Environmental regulations - Lakes - Remote sensing - Rivers - Sediment transport - Sedimentation - Water levels Uncontrolled terms:Environmental control - Influence of water - Remote sensing monitoring - Sentinel-2 MSI image - Spatial differentiation - Spatio-temporal variation - Statistical regression - Suspended sediment concentrations Classification code:454.2 Environmental Impact and Protection - 483 Soil Mechanics and Foundations - 802.3 Chemical Operations DOI:10.13227/j.hjkx.201907164 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278075 Title:Emission Characteristics of Volatile Organic Compounds from Typical Industries in Zibo Title of translation:淄博市重点工业行业VOCs排放特征 Authors:Wang, Yu-Yan (1); Wang, Xiu-Yan (1); Du, Miao (1); Bai, Jin-Feng (1); Yang, Wen (2) Author affiliation:(1) College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Wang, Xiu-Yan(wangsy@nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1078-1084 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the emission characteristics of volatile organic compounds (VOCs) in Zibo, nine key industries and their representative enterprises were selected to conduct a field investigation and measurement. The emitted VOC characteristics in different industries were analyzed. Based on measurement data, the emissions of VOCs from all monitored enterprises were calculated to obtain the localization emission factors. The results showed that different industries exhibited some differences in VOCs components, and the major VOCs components were alkane and halo hydrocarbon. Ethane, acetylene, chloromethane (conclude 1, 1-dichloroethane, 1, 1, 1-trichloroethane), and Freon (Freon 12 or Freon 114) were the characteristic species in most industries. The results indicated that the major VOCs emission links in different types of petrochemical industries were equipment leakage, loading volatilization, storage volatilization losses, and organized discharge, which accounted for more than 40% of emissions. Local emission factors of VOCs calculated in the synthetic rubber and steel manufacturing industries were close to the recommended values in the guide, whereas there were large gaps in other industries.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Rubber industry Controlled terms:Digital storage - Gas chromatography - Hydrocarbons - Industry - Rubber applications - Synthetic rubber - Volatile organic compounds Uncontrolled terms:1 ,1 ,1-trichloroethanes - Emission characteristics - Emission factors - Emission inventories - Field investigation - Petrochemical industry - Steel manufacturing - Volatilization loss Classification code:722.1 Data Storage, Equipment and Techniques - 802.3 Chemical Operations - 804.1 Organic Compounds - 818 Rubber and Elastomers Numerical data indexing:Percentage 4.00e+01% DOI:10.13227/j.hjkx.201906068 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861831 Title:Distribution Characteristics of Microplastics in Surface Water and Sediments of Haizhou Bay, Lianyungang Title of translation:连云港海州湾海域表层水体和沉积物中微塑料的分布特征 Authors:Li, Zheng (1); Gao, Chun-Mei (2); Yang, Jin-Long (3); Wu, Li-Zhen (4); Zhang, Shou (1, 5); Liu, Yan-Hua (2); Jin, Di-Di (2) Author affiliation:(1) College of Marine Sciences, Shanghai Ocean University, Shanghai; 201306, China; (2) College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai; 201306, China; (3) College of Fisheries and Life Science, Shanghai Ocean University, Shanghai; 201306, China; (4) Oceanic Administration and Protection Center of Lianyungang, Lianyungang; 222001, China; (5) Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai; 201306, China Corresponding author:Zhang, Shou(s-zhang@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3212-3221 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, microplastics have emerged as a new marine pollutant and have attracted wide research attention. As the main activity areas of human beings in the coastal environment, gulfs have always been the hotspots of marine pollution. However, the distribution of microplastics in most small and medium-sized coastal environments has been rarely reported in China. To understand the characteristics of microplastic pollution in small and medium-sized inshore bays in China, the main types, abundance, and spatial distribution characteristics of microplastics in the surface water and sediments in Haizhou Bay of Jiangsu province were studied by qualitative and quantitative methods. The results showed that the abundances of microplastics in the surface water and sediments of Haizhou Bay were (2.60±1.40) n•m^-3 and (0.33±0.26) n•g^-1, respectively. In the domestic offshore environment, the abundance of microplastics was at a low level in the surface water, but at a high level in the sediments in Haizhou Bay (0.33-545.00 n•m^-3 and 0.07-2.58 n•g^-1, respectively). The range of size distribution of microplastics in water and sediments was 0.08-13.48 mm and 0.04-14.74 mm, respectively. More than 60% of the microplastics in water and sediments were small particles of sizes less than 2.00 mm. The shape of microplastics in Haizhou Bay was mainly fibrous, accounting for 92%. The main colors were blue and black, accounting for 70%. The materials were mainly man-made fibers and PET, accounting for 79.4%. There was a significant correlation between the distribution of microplastics in surface water and suspended matter concentration (P<0.05). The distribution of microplastics in sediments was affected by many factors, and its distribution pattern between the distribution of microplastics in surface water and the distribution of particle size in sediments was quite different. Through analysis of the morphological characteristics and composition of microplastics, the results showed that the microplastics in Haizhou Bay mainly come from mariculture and coastal land sources.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Surface waters Controlled terms:Coastal zones - Marine biology - Marine pollution - Microplastic - Offshore oil well production - Particle size - Particle size analysis - River pollution - Sediments - Size distribution Uncontrolled terms:Coastal environments - Distribution characteristics - Distribution of particles - Distribution patterns - Morphological characteristic - Offshore environments - Quantitative method - Suspended matters Classification code:444.1 Surface Water - 453 Water Pollution - 461.9 Biology - 471 Marine Science and Oceanography - 483 Soil Mechanics and Foundations - 511.1 Oil Field Production Operations - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Percentage 6.00e+01%, Percentage 7.00e+01%, Percentage 7.94e+01%, Percentage 9.20e+01%, Size 2.00e-03m, Size 4.00e-05m to 1.47e-02m, Size 8.00e-05m to 1.35e-02m DOI:10.13227/j.hjkx.201910005 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990492 Title:Process Control and Operation Optimization of PN-SAD Coupling Process Based on SBR-ABR Title of translation:基于SBR-ABR实现PN-SAD耦合工艺的运行与优化调控 Authors:Chen, Chong-Jun (1, 2, 3, 4); Zhang, Min (1); Jiang, Ying (1); Guo, Meng-Lei (1); Xie, Jia-Wei (1); Xie, Jun-Xiang (1); Shen, Yao-Liang (1, 2, 3) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China; (3) Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou; 215009, China; (4) Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi; 214122, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:330-336 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study uses three different operating phases for a sequencing batch reactor (SBR) combined with an anaerobic baffled reactor (ABR) to determine the effect of deep nitrogen and carbon removal by the "partial nitrification-anaerobic ammonium oxidation combined denitrification" (termed PN-SAD) reaction. The effluent of the SBR (NO2^--N/NH4⁺-N ratio range of 1-1.32) was accessed directly to the single compartment ABR anammox system in phase Ⅰ. The results showed that although the anammox reaction was stable, the combined process total nitrogen (TN) removal efficiency was<80%, and the TN concentration of effluent was ~20 mg•L^-1. In order to increase the denitrification function in the ABR, denitrifying sludge was added to the third compartment of the ABR in phase Ⅱ. We found that the TN removal efficiency of the coupling reaction was still low. An organic carbon source should be supplied in the latter stage of anammox if deep nitrogen removal is required. Therefore, in phase Ⅲ, the effluent of the SBR (NO2^--N/NH4⁺-N ratio of ~5) was mixed with the partial raw water (mixed water NO2^--N/NH4⁺-N ratio of ~1.4; C/N ratio of 2.5). The mixed water was connected to the single compartment of the ABR. The PN-SAD system not only achieved a good matrix ratio at the anammox stage, but also provided a good carbon source for denitrification. The chemical oxygen demand (COD) concentration of the effluent in the whole process was 50 mg•L^-1, the TN concentration of the effluent was<6 mg•L^-1, and the TN removal efficiency was 95%. We conclude that the stable operation of the combined PN-SAD reaction provides the basis for deep nitrogen and carbon removal using the combined SBR-ABR process.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Nitrogen removal Controlled terms:Batch reactors - Chemical bonds - Chemical oxygen demand - Denitrification - Efficiency - Effluents - Nitrogen oxides - Organic carbon - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Anaerobic baffled reactor - Coupling reaction - Operation optimization - Partial nitrification - Removal efficiencies - Sequencing batch reactors - Stable operation Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 801.4 Physical Chemistry - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 9.50e+01% DOI:10.13227/j.hjkx.201907009 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796089 Title:Ambient VOCs Characteristics, Ozone Formation Potential, and Source Apportionment of Air Pollution in Spring in Zhengzhou Title of translation:郑州市春季大气污染过程VOCs特征, 臭氧生成潜势及源解析 Authors:Ren, Yi-Jun (1); Ma, Shuang-Liang (2); Wang, Si-Wei (2); Yu, Shi-Jie (1); Li, Yi-Dan (1); Zhang, Rui-Qin (1); Yin, Sha-Sha (1) Author affiliation:(1) Research Institute of Environmental Science, College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Environmental Monitoring Center of Henan Province, Zhengzhou; 450003, China Corresponding author:Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2577-2585 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ambient volatile organic compounds (VOCs) were determined by GC 5000 online gas chromatography in the urban site of Zhengzhou from April 15 to May 15, 2018. Based on chemical composition analysis, in this study, the concentrations, ozone formation potential (OFP), and source apportionment were studied. The results show that the averaged volume fraction of VOCs in Zhengzhou during spring was 40.26×10^-9, which was 23% higher on polluted days (44.12×10^-9) than on non-polluted days (35.82×10^-9). The contribution of VOC species to OFP was in the order: alkenes > aromatics > alkanes > alkyne. The five factors identified by the PMF model were liquefied petroleum gas (LPG) volatilization sources (66.05%), motor vehicle exhaust sources (47.39%), industrial solvent sources (37.51%), fuel combustion sources (37.80%), and biogenic sources (11.25%). The contributions of LPG volatilization sources and biogenic sources on polluted days were higher by 22.92% and 68.50% than on non-polluted days, respectively.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Liquefied petroleum gas Controlled terms:Air pollution - Fuels - Gas chromatography - Hydrocarbons - Ozone - Springs (components) - Urban growth - Volatile organic compounds Uncontrolled terms:Chemical composition analysis - Fuel combustion - Industrial solvents - Liquefied petroleum gas (LPG) - Motor vehicle - Online gas chromatography - Ozone formation potentials - Source apportionment Classification code:403.1 Urban Planning and Development - 451 Air Pollution - 523 Liquid Fuels - 601.2 Machine Components - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.12e+01%, Percentage 2.29e+01%, Percentage 2.30e+01%, Percentage 3.75e+01%, Percentage 3.78e+01%, Percentage 4.74e+01%, Percentage 6.60e+01%, Percentage 6.85e+01% DOI:10.13227/j.hjkx.201911081 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796413 Title:Reconstructed Soil Vertical Profile Heavy Metal Cd Occurrence and Its Influencing Factors Title of translation:重构土壤垂直剖面重金属Cd赋存形态及影响因素 Authors:Hu, Qing-Qing (1); Shen, Qiang (2); Chen, Fei (1); Yin, Bing (1); Zou, Hong-Guang (1); Zhuang, Hong-Juan (1); Zhang, Shi-Wen (1) Author affiliation:(1) School of Earth and Environment, Anhui University of Science and Technology, Huainan; 232001, China; (2) School of Geodesy and Geomatics, Anhui University of Science and Technology, Huainan; 232001, China Corresponding author:Zhang, Shi-Wen(mamin1190@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2878-2888 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Aiming at the problem of heavy metal Cd pollution in mining wasteland under the high background value and superposition area of the historical mining source, a total of 30 samples were collected from the reclaimed soil of a historical sulfur mine in Southwest China. The total contents of Cadmium (Cd), Chromium (Cr), Nickel (Ni), Arsenic (As), and Mercury (Hg) in soil samples were analyzed. Scanning electron microscopy-electron diffraction spectroscopy (SEM-EDS) and BCR method for continuous extraction of heavy metals were used to analyze the occurrence of Cd under different soil thicknesses. The effectiveness of heavy metal Cd was evaluated by the risk assessment coding method (RAC), and the ratio of secondary phase and primary phase (RSP) was obtained. In addition, the changes in Cd morphology under different physicochemical properties were discussed. The results show that the concentration factor of Cd in the five heavy metals is the highest over 4. Through the morphological characteristics, it can be found that there are mainly subangular and angular particles in the samples. The resulting energy spectrum characteristics at different depths were similar, and all sampled contained Cd, Fe, S, and As. Isomorphs of Cd element were observed. According to the potential risk assessment of Cd, the RAC results show that the risk is medium or below, while the RSP results may lead to serious pollution except for the bottom layer. The total amount of heavy metals is the most important factor affecting the distribution of Cd forms, followed by pH, organic matter, and CEC. The results of this study can provide scientific basis for further understanding the activity, migration rule, biological toxicity, and occurrence form of Cd in profile soil.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Cadmium metallography Controlled terms:Heavy metals - Land reclamation - Physicochemical properties - Pollution - Risk assessment - Scanning electron microscopy - Soils Uncontrolled terms:Angular particles - Biological toxicity - Concentration factors - Continuous extraction - Electron diffraction spectroscopies - Mining wastelands - Morphological characteristic - Superposition area Classification code:442.2 Land Reclamation - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 531.2 Metallography - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201911023 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796256 Title:Bacterial Community Composition in Cadmium-Contaminated Soils in Xinxiang City and Its Ability to Reduce Cadmium Bioaccumulation in Pak Choi (Brassica chinensis L.) Title of translation:新乡市镉污染土壤细菌群落组成及其对镉固定效果 Authors:Chen, Zhao-Jin (1); Li, Ying-Jun (2); Shao, Yang (2); Lin, Li-An (2); Xu, Ge (2); Chen, Yan (2); Tian, Wei (3); Yao, Lun-Guang (1); Han, Hui (1) Author affiliation:(1) Collaborative Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang; 473061, China; (2) School of Life Science and Technology, Nanyang Normal University, Nanyang; 473061, China; (3) Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing; 210042, China Corresponding author:Han, Hui(17657311626@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2889-2897 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:There are many types of bacteria in heavy metal-contaminated soils, including plant growth-promoting bacteria and heavy metal-immobilizing bacteria, which may potentially be used for the bioremediation of contaminated soil. In this study, the Cd-contaminated soil around a battery factory in Xinxiang City was collected and its bacterial community composition was analyzed using high-throughput sequencing (HTS) and the plate lineation separation method. The traditional culture method showed that bacteria isolated from contaminated soil belonged to four phyla (Firmicutes, Actinobacteria, Proteobacteria, and Bacteroidetes) and 30 genera including Bacillus, Arthrobacter, and Rhizobium. HTS showed that the soil contained 25 phyla including Proteobacteria, Actinobacteria, and Acidobacteria and 400 genera. The HTS analysis revealed a greater diversity of the bacterial community than the traditional culture method. Network analysis was performed using the relative abundances of bacteria based on the phylogenetic molecular ecological network (pMEN) method. Network analysis showed that the key bacteria included Arthrobacter, Marmoricola, Nocardioides, Ferruginibacter, Flavitalea, Nitrospira, and Lysobacter. The Cd fixation and adsorption abilities of the 159 cultivable strains were determined. The results showed that 30 strains from 11 genera, including Aneurinibacillus, Arthrobacter, and Bacillus, were highly efficient. Six high-efficiency strains were shown to increase the biomass of pak choi (Brassica chinensis L.) and reduce the content of Cd in different pak choi tissues. This study provides candidate bacterial species for the remediation of heavy metal-contaminated soil in Xinxiang City and provides references for the bacterial community and its function in heavy metal-contaminated soil.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Soil pollution Controlled terms:Bacteria - Bacteriology - Biochemistry - Bioremediation - Contamination - Heavy metals - Metal analysis - Plant life extension - Soil pollution control - Soils Uncontrolled terms:Bacterial community - Bacterial community composition - Cd-contaminated soils - Ecological networks - Heavy metal contaminated soils - High-throughput sequencing - Plant growth promoting bacterium - Traditional cultures Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801.2 Biochemistry DOI:10.13227/j.hjkx.201912039 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070754 Title:VOCs Emission Characteristics of DPF Regeneration in National Ⅵ Diesel Engine Title of translation:国六柴油机DPF再生时VOCs排放特性 Authors:Qian, Feng (1); Xue, Chang-Xin (1); Xu, Xiao-Wei (1); Ma, Dong (2, 3); Li, Peng (4); Zhu, Neng (4) Author affiliation:(1) School of Automobile and Transportation Engineering, Wuhan University of Science and Technology, Wuhan; 430081, China; (2) State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) School of Environment, Tsinghua University, Beijing; 100084, China; (4) Key Laboratory of High Performance Ship of Ministry of Education, Wuhan University of Technology, Wuhan; 430063, China Corresponding author:Xu, Xiao-Wei(xxw15@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:674-681 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The diesel particulate filter (DPF) is one of the necessary devices required for diesel engines to meet the National Ⅵ emission standards. In this study, its function is tested in bench experiments, showing that the emission of volatile organic compounds (VOCs) during the regeneration of DPF assisted by the oxidized catalytic converter (DOC) is significantly increased. The "calculation guide of air pollutant emission for road vehicles" formulated in 2014 did not take into account the impact of the DPF regeneration process on VOCs emission. The tail gas of the DPF regeneration process of the National Ⅵ diesel engine was collected in the bench test, and the VOCs in the exhaust gas were quantitatively analyzed by gas chromatography mass spectrometry. Results show that the VOC emissions in the DPF regeneration process increased significantly. The total amount of VOCs is four times that during non-regeneration, and the increase is 2 419.6 μg•m^-3. The VOCs emitted by DPF regeneration have the highest alkane content, followed by aromatic hydrocarbons, aldehydes and ketones, and olefins, which account for the total emission of VOCs, namely 42.5%, 29.7%, 24.9% and 2.9%, respectively. Using the generation potential of ozone and secondary organic aerogel to evaluate the atmospheric activity of VOCs, we found that the increased VOCs during DPF regeneration had a significant impact on the environment. The ozone and secondary organic aerosols generated by the increased VOCs were 4 272.8 μg•m^-3 and 9.0 μg•m^-3, respectively. The aromatic hydrocarbons and alkanes contributed the most significantly to the ozone and secondary organic aerosols. Therefore, the impact of DPF regeneration on VOCs emissions from diesel engines should be considered. From the calculation, the VOCs emission factor of the DPF regeneration is 1.03 mg•(kW•h)^-1, which can serve as a reference for the development of National Ⅵ diesel vehicle VOCs emission factors.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Particulate emissions Controlled terms:Aerogels - Aerosols - Air pollution - Aromatic hydrocarbons - Diesel engines - Fuel filters - Gas chromatography - Ketones - Mass spectrometry - Mineral oils - Ozone - Paraffins - Particles (particulate matter) - Road vehicles - Volatile organic compounds Uncontrolled terms:Diesel particulate filters - Emission characteristics - Emission factors - Emission of volatile organic compounds - Gas chromatography-mass spectrometry - Impact on the environment - Regeneration - Secondary organic aerosols Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 513.3 Petroleum Products - 612.2 Diesel Engines - 801 Chemistry - 801.3 Colloid Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 2.49e+01%, Percentage 2.90e+00%, Percentage 2.97e+01%, Percentage 4.25e+01% DOI:10.13227/j.hjkx.201906012 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070400 Title:Simultaneous Short-Cut Nitrification-Denitrification Phosphorus Removal Granules Induced by Phosphorus Removal Granules Title of translation:除磷颗粒诱导的同步短程硝化反硝化除磷颗粒污泥工艺 Authors:Li, Dong (1); Liu, Bo (1); Wang, Wen-Qi (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:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:867-875 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This paper investigated domestic sewage with a low C/N ratio. Mature phosphorus removal granules were inoculated to cultivate granules with a simultaneous short-cut nitrification and denitrification function. The characteristics of nitrogen and phosphorus removal of this process were analyzed. Results show that AOB can be enriched by prolonging the sludge age for 30 days with an aeration intensity of 5 L•(h•L)^-1and shorter aeration time (140 min), whereas the simultaneous nitrification and denitrification ability could not be improved. The nitrogen loss increased at the aerobic time when aeration intensity was reduced by 3.5 L•(h•L)^-1 and aeration time was prolonged by 200 min. The aeration time was further optimized to restrain the transformation of NO2^- to NO3^-, and finally the effluent of TP<0.5 mg•L^-1and TN<15 mg•L^-1. During the process of the system function transformation from phosphorus removal to nitrogen and phosphorus removal, the phosphorus release decreased, however PAOs still played a dominant role (60%) in the process of internal carbon storage. Batch experiments showed that DPAOs that can utilize nitrite as an electron acceptor accounts for 52.43% in the total PAOS, which alleviated the pressure of the carbon source and improved the simultaneous nitrogen and phosphorus removal.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Nitrogen removal Controlled terms:Denitrification - Granulation - Nitrification - Nitrogen - Phosphorus - Sewage Uncontrolled terms:Aeration intensity - Denitrifying phosphorus removal - Nitrification-denitrification - Nitrogen and phosphorus removal - Phosphorus removal - Short-cut nitrification and denitrifications - Simultaneous nitrification and denitrification - Simultaneous nitrogen and phosphorus removals Classification code:452.1 Sewage - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Age 8.22e-02yr, Percentage 5.24e+01%, Percentage 6.00e+01%, Time 1.20e+04s, Time 8.40e+03s DOI:10.13227/j.hjkx.201909108 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371208 Title:Effects of VOCs on Ozone Formation in the Tianjin Suburbs in Summer Title of translation:天津夏季郊区VOCs对臭氧生成的影响 Authors:Yao, Qing (1); Han, Su-Qin (2); Zhang, Yu-Fen (3); Bi, Xiao-Hui (3); Wang, Xiao-Jia (1); Cai, Zi-Ying (1) Author affiliation:(1) Tianjin Environmental Meteorology Center, Tianjin; 300074, China; (2) Tianjin Institute of Meteorological Science, Tianjin; 300074, China; (3) State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1573-1581 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Volatile organic compounds (VOCs) play an important role in the formation of ozone. The concentrations of VOCs in the Jinnan District of Tianjin were monitored by the Syntech Spectras GC955 online monitoring system, and the ozone generation potential of VOCs was calculated by the maximum incremental activity factor. The results showed that the total concentration of VOCs in the Jinnan District was (32.33±23.77) μg•m^-3, in which the mass concentration of alkane was the highest, and propylene, ethylene and toluene had the highest mass concentration. During the observation period, the ozone formation potential (OFP) of TVOC was 107.81 μg•m^-3, and the contribution of alkenes to OFP was the largest, which was 55.80%. Ethylene, isoprene, and toluene accounted for the first three places of OFP contribution rate. The backward trajectory analysis showed that TVOC and its OFPs were different under different trajectories. The estimation of VOCs/NOx volume fraction ratio showed that O3 formation was sensitive to VOCs, which showed that atmospheric photochemical pollution has a considerable degree of regional characteristics. The concentration ratio of ethylbenzene/m,p-xylene, and ethane/acetylene can be used to measure the progress of atmospheric chemical reaction and photochemical age in the air mass, which was proved by the aging process of VOC.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Air pollution Controlled terms:Aliphatic compounds - Atmospheric chemistry - Ethylene - Ozone - Toluene - Trajectories - Volatile organic compounds Uncontrolled terms:Atmospheric chemical reaction - Backward trajectory - Backward trajectory analysis - On-line monitoring system - Ozone formation potentials - Regional characteristics - Tianjin - Typical species Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 5.58e+01% DOI:10.13227/j.hjkx.201908078 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371259 Title:Preparation of Modified Watermelon Biochar and Its Adsorption Properties for Pb(Ⅱ) Title of translation:改性西瓜皮生物炭的制备及其对Pb(Ⅱ)的吸附特性 Authors:Bi, Jing-Wang (1, 2, 3); Shan, Rui (2, 3); Han, Jing (1, 2, 3); Yuan, Hao-Ran (2, 3); Shi, Yue-Yue (2, 3); Zhang, Xing-Qing (4) Author affiliation:(1) School of Engineering Science, University of Science and Technology of China, Hefei; 230027, China; (2) Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou; 510640, China; (3) Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou; 511458, China; (4) Chongqing Environment & Sanitation Group Co., Ltd., Chongqing; 401121, China Corresponding author:Yuan, Hao-Ran(yuanhr@ms.giec.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1770-1778 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, watermelon rind was used as a raw material to modify watermelon rind biochar (MBC) with ammonium sulphate [(NH4)2S] for adsorption of Pb(Ⅱ) ions. The effects of solution pH, adsorption time, adsorbent addition amount, initial mass concentration of Pb(Ⅱ) ions, and ionic strength on the adsorption of Pb(Ⅱ) ions were investigated. The results show that the saturated adsorption time was 5 h, the optimum pH of the adsorption reaction was 6, and when the initial mass concentration of Pb(Ⅱ) ions were 1 000 mg•L^-1, and the amount of adsorbent was 2.0 g•L^-1. The maximum adsorption amount of MBC to Pb(Ⅱ) ions can reach 97.63 mg•g^-1, which is significantly higher than unmodified watermelon husk biochar (BC). The adsorption of Pb(Ⅱ) ions by modified watermelon biochar was in accordance with the Langmuir isotherm adsorption model and the pseudo second-order kinetic model, which proves that adsorption is dominated by monolayer chemical adsorption. The desorption of MBC after adsorption of Pb(Ⅱ) ions was carried out using a sodium hydroxide solution to study the reusability of MBC, and the adsorption amount was still 64.74 mg•g^-1 in the sixth cycle. Characterization and analysis of adsorbents by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, nitrogen adsorption, scanning electron microscopy-energy spectroscopy, zeta potential analysis, and X-ray diffraction (XRD) were carried out, which showed that the adsorption mechanism is mainly that MBC oxygen- and MBC sulfur-containing groups adsorb Pb(Ⅱ) through complexation and precipitation. Therefore, ammonium sulfide modified watermelon rind biochar can be used as a highly efficient lead adsorbent.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Lead metallography Controlled terms:Adsorption - Adsorption isotherms - Fourier transform infrared spectroscopy - Gas adsorption - Ionic strength - Ions - Monolayers - Reusability - Scanning electron microscopy - Sodium hydroxide - Spectrum analysis - Sulfur compounds - X ray photoelectron spectroscopy Uncontrolled terms:Adsorption properties - Ammonium sulfide - Bio chars - Cycle - Modification - Pseudo-second-order kinetic models - Sodium hydroxide solutions - Zeta potential analysis Classification code:531.2 Metallography - 801 Chemistry - 801.4 Physical Chemistry - 802.3 Chemical Operations Numerical data indexing:Mass_Density 1.00e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e+00kg/m3 to 2.20e-02kg/m3, Time 1.80e+04s DOI:10.13227/j.hjkx.201909165 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368733 Title:Sediment Denitrification Rate and Its Response to Exogenous Carbon and Nitrogen in the Ponds and Bottomland of the Chaohu Lakeshore Zone Title of translation:巢湖滨岸水塘洼地沉积物反硝化速率及对外源碳氮的响应 Authors:Li, Ru-Zhong (1, 2); Wang, Li (1, 2); Liu, Chao (1, 2) Author affiliation:(1) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei; 230009, China; (2) Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei; 230009, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1684-1691 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:From October 2018 to August 2019, three typical ponds and bottomland were selected in the Chaohu lakeshore zone, where surface sediments and overlying water samples were collected simultaneously. A set of incubation experiments, along with exogenous carbon and nitrogen concentration gradients, were conducted to analyze sediment denitrification rates and its response to carbon and nitrogen limitation. Moreover, the main influencing factors for the sediment denitrification process were identified using correlation analysis method. The results showed that ① the denitrification rates of three plant plexus sediments were 2.15-10.87, 2.08-10.65, and 2.06-10.88 mg•(kg•h)^-1, with averages of 6.47, 6.97, and 6.76 mg•(kg•h)^-1, respectively. Overall, there was no significant difference between them. ② In general, exogenous nitrogen addition could significantly increase denitrification rates of the three plant sediments, indicating that nitrate was the limiting factor for the sediment denitrification process. ③ Exogenous carbon addition resulted in a significant decrease in the denitrification rates of three plant plexus sediments, indicating that organic carbon inhibited the denitrification process. ④ Exogenous carbon and nitrogen added simultaneously displayed a dramatic effect on the increase of sediment denitrification rates. Except for the bottomland Pucao in October and pond Pucao in June, all other cases showed higher denitrification rates for high carbon and nitrogen concentration.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Denitrification Controlled terms:Lakes - Nitrogen - Organic carbon - Sediments Uncontrolled terms:Carbon and nitrogen - Correlation analysis - Denitrification process - Denitrification rate - Influencing factors - Lake Chaohu - Nitrogen additions - Surface sediments Classification code:483 Soil Mechanics and Foundations - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201910128 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371249 Title:Characteristics and Source Apportionment of Black Carbon in Chengdu Title of translation:成都地区黑碳气溶胶变化特征及其来源解析 Authors:Wang, Lu (1, 2); Yuan, Liang (1); Zhang, Xiao-Ling (1, 3); Jia, Yue-Tao (4) 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) Jinxi Meteorological Bureau, Fuzhou; 344800, China; (3) Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing; 100089, China; (4) Wulatezhongqi Meteorological Bureau, Bayannur; 015300, China Corresponding author:Yuan, Liang(yuanl_nuist@outlook.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1561-1572 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Black carbon (BC) was measured at Chengdu from December 1, 2017, to November 30, 2018, using a seven-channel aethalometer (AE-33). The variation characteristics of BC were obtained. BC sources were explored based on the aethalometer model and a hybrid single particle Lagrangian integrated trajectory model (Hysplit-4). The results showed the BC concentration was the highest in the winter (8.18 μg•m^-3) with the monthly mean of 11.11 μg•m^-3 peaking in December, followed by the spring (5.11 μg•m^-3) and autumn (3.91 μg•m^-3), and was the lowest in summer (3.28 μg•m^-3) with the lowest monthly mean of 2.30 μg•m^-3 in July. The annual average concentration of BC was 5.26 μg•m^-3 with a standard deviation of 4.27 μg•m^-3. The diurnal variations of BC showed typical bimodal patterns in four seasons mainly due to the influence of the boundary layer and traffic rush. The source apportionment of BC showed that the liquid fuel (e.g., vehicle emission) had higher contribution to total BC concentration during all seasons (ranging from 69% in winter to 82% in summer) than solid fuel (e.g., coal and biomass combustion). The contribution of liquid fuel to the total BC was higher in summer, while solid fuel had a higher contribution in winter. The diurnal cycles of BC source apportionment demonstrated that the contribution of liquid fuel increased in the rush hours. The results of potential source contribution function and concentration weighted trajectory showed that the potential sources of BC in Chengdu were slightly different in different seasons and were mainly affected by the different air mass sources. However, the main potential source regions were the surrounding areas of Chengdu and the areas between Chengdu and Chongqing (the Chuanyu City group). The mass contribution to the BC in Chengdu was high in the region where liquid fuel most affected the total BC. Additionally, the southern part of Shaanxi and the southern part of Gansu were also potential sources of BC, and in Summer, some regions in Guangxi and Guizhou could become the source regions of BC in Chengdu.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Liquids Controlled terms:Boundary layers - Carbon - Coal - Coal combustion - Liquid fuels - Trajectories Uncontrolled terms:Backward trajectory - Black carbon - Chengdu - Source apportionment - Variation characteristics Classification code:523 Liquid Fuels - 524 Solid Fuels - 804 Chemical Products Generally Numerical data indexing:Percentage 6.90e+01%, Percentage 8.20e+01% DOI:10.13227/j.hjkx.201908190 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658180 Title:Characteristics of ANAMMOX Granular Sludge and Differences in Microbial Community Structure Under Different Culture Conditions Title of translation:不同培养条件厌氧氨氧化颗粒污泥性质及微生物群落结构差异 Authors:Jiang, Ying (1); Guo, Meng-Lei (1); Xie, Jun-Xiang (1); Chang, Yao-Feng (1); Xie, Jia-Wei (1); Chen, Chong-Jun (1, 2, 3); Shen, Yao-Liang (1, 2, 3) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China; (3) Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou; 215009, China Corresponding author:Chen, Chong-Jun(chongjunchen@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2358-2366 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Anaerobic ammonium oxidation (ANAMMOX) granular sludge was cultured during different operating conditions by an expanded granular sludge bed (EGSB) reactor and up-flow anaerobic sludge bed (UASB) reactors, and the characteristics of the granular sludge and microbial community were compared. The results showed that the flocculent ANAMMOX sludge can be granulated after being operated for 384 days by the EGSB and UASB reactors. The average particle size reached 1.17 mm and 1.21 mm, respectively. The particle size ratio of each range (<0.2, 0.2-1.5, 1.5-3, and>3 mm) was 6.06%, 60.05%, 25.25%, and 8.64% in the EGSB reactor, and 7.40%, 58.90%, 32.04%, and 1.66% in the UASB reactor, respectively. The results of scanning electron microscopy showed that the bacterial flora during different operating conditions were mainly Brevibacterium and Cocci aggregates. High-throughput sequencing results showed that the Shannon index of the EGSB reactor was 7.52, higher than the 7.18 of the UASB reactor on day 384; Proteobacteria was the main phylum of the sludge at each stage, and Planctomycetes increased from 3.30% to 12.30% in the EGSB reactor and 13.30% in the UASB reactor on day 384. The main ANAMMOX genera in the EGSB reactor were Candidatus Brocadia, accounting for 7.53%, followed by Candidatus Kuenenia accounting for 1.61%, whereas in the UASB reactor, Candidatus Kuenenia was the dominant anaerobic ammonia genus, accounting for 7.54%, followed by Candidatus Brocadia, which accounted for 3.69%. The proportion of dominant species was related to the change in environmental factors. The proportion of Candidatus Brocadia was positively correlated with the up-flow rate and nitrogen removal rate (NRR), but negatively correlated with hydraulic retention time (HRT). Candidatus Kuenenia was positively correlated with nitrogen removal efficiency (NRE), NRR, and HRT, but negatively correlated with the up-flow rate.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Nitrogen removal Controlled terms:Aggregates - Ammonia - Granular materials - Microorganisms - Particle size - Scanning electron microscopy - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Different operating conditions - Expanded granular sludge bed reactor - High-throughput sequencing - Hydraulic retention time - Microbial community structures - Nitrogen removal efficiency - Up-flow anaerobic sludge bed reactors Classification code:406 Highway Engineering - 452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 7.40e+00%, Percentage 7.53e+00%, Percentage 7.54e+00%, Percentage 8.64e+00%, Size 1.17e-03m, Size 1.21e-03m, Age 1.05e+00yr, Percentage 1.33e+01%, Percentage 1.61e+00%, Percentage 1.66e+00%, Percentage 2.52e+01%, Percentage 3.20e+01%, Percentage 3.30e+00% to 1.23e+01%, Percentage 3.69e+00%, Percentage 5.89e+01%, Percentage 6.00e+01%, Percentage 6.06e+00% DOI:10.13227/j.hjkx.201911052 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658202 Title:Hydrochemical Characteristics and Formation Causes of Ground Karst Water Systems in the Longzici Spring Catchment Title of translation:龙子祠泉域岩溶地下水水化学特征及成因 Authors:Tang, Chun-Lei (1, 2); Zheng, Xiu-Qing (1); Liang, Yong-Ping (2) Author affiliation:(1) College of Water Conservancy Science and Engineering, Taiyuan University of Technology, Taiyuan; 030024, China; (2) Key Laboratory of Karst Dynamics, Ministry of Land and Resources and Guangxi Zhuang Autonomous Region, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China Corresponding author:Zheng, Xiu-Qing(zhengxiuqing@tyut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2087-2095 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The water of the Longzici Spring catchment is the source of industrial, agricultural, and urban domestic water in Linfen City, Shanxi Province. It is of great significance to identify the sources and influencing factors of karst water resources for their development and utilization, and the protection of the ecological environment. Taking the karst groundwater in the Longzici Spring Area as the research object, systematic sample collection and isotope analysis were carried out. Hydrochemistry methods (Durov diagram, ion ratio system, Gibbs diagram, hydrogen and oxygen isotopes, and sulfur isotopes) were used to analyze the hydrochemical characteristics of groundwater. The hydrogeochemical and environmental isotopic characteristics of Longzici Spring water are revealed. The hydrochemical field of karst groundwater in the Longzici Spring domain has obvious zonation, from the deep buried detention area to the supply area to the runoff and discharge area. The hydrochemical types of karst groundwater detention area are SO4-Ca and SO4-Ca•Mg, with total dissolved solids (TDS) of 960.5-2340 mg•L^-1; the supply area is HCO3-Ca•Mg and HCO3•SO4-Ca•Mg, with TDS of 340.5-562 mg•L^-1; and the runoff and discharge areas are SO4•HCO3-Ca•Mg•Na, SO4•HCO3-Ca, and SO4•HCO3-Ca•Mg, with TDS of 494.0-1 168.5 mg•L^-1. The karst groundwater is mainly SO4•HCO3-Ca and SO4•HCO3-Ca•Mg type water. The content range of sulfate ions is 61.6-1 503 mg•L^-1, with an average of 481.4 mg•L^-1. A total of 70.3% of the karst groundwater SO4^2- samples exceed the standard. The sulfate ions in karst groundwater mainly come from the dissolution of gypsum in the Ordovician aquifer and the oxidation of pyrite in a coal aquifer. The ratio of sulfate ions in the Longzici Spring catchment that come from pyrite oxidation in water is 20.2%. According to the analysis of hydrogen, oxygen and sulfur isotopes, 70% of karst groundwater is polluted by the acid water of coal mines to different degrees. Using the software PHREEQC, it is concluded that the hydrochemical characteristics of the study area are mainly affected by dissolution and dedolomitization, rock salt, and gypsum.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Groundwater resources Controlled terms:Agricultural robots - Aquifers - Calcium compounds - Catchments - Coal industry - Coal mines - Dissolution - Groundwater geochemistry - Groundwater pollution - Gypsum - Hydrochemistry - Hydrogen - Ions - Isotopes - Landforms - Magnesium compounds - Oxygen - Pyrites - Runoff - Springs (components) - Sulfur - Sulfur compounds Uncontrolled terms:Development and utilizations - Ecological environments - Hydrochemical characteristics - Isotopic characteristics - Karst groundwater - Karst water resources - Oxygen and sulfurs - Total dissolved solids Classification code:444.1 Surface Water - 444.2 Groundwater - 481.1 Geology - 481.2 Geochemistry - 482.2 Minerals - 503 Mines and Mining, Coal - 503.1 Coal Mines - 524 Solid Fuels - 601.2 Machine Components - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.69e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 4.81e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 6.16e-02kg/m3 to 1.50e+00kg/m3, Percentage 2.02e+01%, Percentage 7.00e+01%, Percentage 7.03e+01% DOI:10.13227/j.hjkx.201910078 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796136 Title:Effects of Biochar on Bioavailability of Two Elements in Phosphorus and Cadmium-Enriched Soil and Accumulation of Cadmium in Crops Title of translation:生物质炭对磷镉富集土壤中两种元素生物有效性及作物镉积累的影响 Authors:Huang, Yang (1); Guo, Xiao (1); Hu, Xue-Yu (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:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2861-2868 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Using phosphorus and cadmium enriched soil (total Cd is 0.94 mg•kg^-1, total phosphorus is 0.86 g•kg^-1) and low cadmium accumulation genotype Jinqiuhong 3 as experimental materials, we set up four treatments: absolute control (only NK inorganic fertilizer), relative control (CKp, NPK inorganic fertilizer), biochar (only NK inorganic fertilizer), and biochar+phosphate fertilizer (BC-CKp). The availability of phosphorus and heavy metal Cd in soil, the biomass, Cd accumulation characteristics of edible parts of plants, and the basic characteristics of soil were investigated. The results showed that the content of available Cd in soil decreased by 8.23% and 5.68% by BC and BC-CKp treatment with biochar compared with CK0 and CKp treatment without biochar, respectively. At the same time, the content of available phosphorus in soil significantly increased 11.60-16.26 mg•kg^-1 of biochar. The content of available Cd in CKp and BC-CKp treated with exogenous phosphate fertilizer was significantly lower than that in CK0 and BC treatments without phosphate fertilizer by 31.43% and 33.29%, respectively. In addition to CK0 treatment, the Cd content of edible parts of Brassica campestris bolting crops in the other three treatment groups (CKp, BC, and BC-CKp) did not exceed the limit value of Cd of the China Food Safety National Standard (GB 2762-2017) of 0.1 mg•kg^-1. The results showed that the dual functions of heavy metal Cd passivation and phosphorus activation could be realized by injecting biochar into moderate and mild Cd contaminated soil with phosphorus enrichment at the same time. Under the condition of no additional use of phosphorus fertilizer, planting vegetable crop genotypes with weak absorption and low accumulation of Cd can not only ensure an increase in biomass of edible parts but can also ensure that the heavy metal Cd content in edible parts meets the national standard of food safety.
© 2020, Science Press. All right reserved. Number of references:48 Main heading:Cadmium Controlled terms:Biochemistry - Chemical contamination - Crops - Food safety - Phosphate fertilizers - Phosphorus - Soil pollution - Soils Uncontrolled terms:Available phosphorus - Basic characteristics - Cd-contaminated soils - Experimental materials - Inorganic fertilizers - National standard - Phosphorus enrichment - Phosphorus fertilizer Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals - 821.4 Agricultural Products - 822.3 Food Products Numerical data indexing:Percentage 3.14e+01%, Percentage 3.33e+01%, Percentage 5.68e+00%, Percentage 8.23e+00% DOI:10.13227/j.hjkx.201911278 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256428 Title:Long-term Stability of Aerobic Granular Sludge Under Low Carbon to Nitrogen Ratio Title of translation:不同低碳氮比废水中好氧颗粒污泥的长期运行稳定性 Authors:Yuan, Qiang-Jun (1); Zhang, Hong-Xing (1); Chen, Fang-Yuan (1) Author affiliation:(1) Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming; 650500, China Corresponding author:Chen, Fang-Yuan(chenfy1220@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4661-4668 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Long-term stability is important for the practical application of aerobic granular sludge system under low carbon to nitrogen ratio (C/N). In this study, aerobic granular sludge, seeded in the reactors A and B, were cultivated under low C/N to investigate the properties, performance, and resilience to shock load in the long-term operation. The load of carbon and nitrogen in the feed was increased gradually. The C/N of reactor A was kept at 2, while that of reactor B was kept at 4 initially and then reduced to 2 in the shock load stage. It was discovered that the aerobic granular sludge stored at 4℃ for 30 days was essentially revived after 25 days of cultivation in reactors A and B, with over 90% removal efficiency for COD and ammonia, respectively. In the following stages, the removal efficiencies of COD and ammonia in reactor B were over 90% and complete nitrification was achieved. In contrast, in reactor A, the removal efficiency of COD was only 80% and only partial nitrification was achieved; however, ammonia removal efficiency of 90% was finally achieved. In the shock load stage, the COD removal efficiencies in reactors A and B were still above 80%, but the ammonia removal efficiencies were severely affected. The removal of ammonia was deteriorated in reactor A, while only partial nitrification was achieved in reactor B. During the entire operation, the physical properties of the aerobic granules in reactors A and B were barely affected, with sludge volume index (SVI30) in reactors A and B maintained at 60 mL•g^-1and 75 mL•g^-1, and mixed liquid suspended solid (MLSS) at 5 g•L^-1and 3.7 g•L^-1, respectively. Microbial analysis showed that the aerobic granular sludge in reactor B has richer and more diverse microbial community than that in reactor A. The abundance of Zoogloea in reactor B, which is simultaneously able to produce polymeric protein and stabilize the structure of the aerobic granules, may be favorable for the high stability of the aerobic granules. These findings suggested that the aerobic granular system under the C/N of 4 had better performance in ammonia removal and higher tolerance to shock load, which guaranteed high stability of the aerobic granular sludge system in long-term operation, as compared to that under the C/N of 2.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Granular materials Controlled terms:Ammonia - Carbon - Efficiency - Granulation - Nitrification - Nitrogen - System stability Uncontrolled terms:Aerobic granular sludges - Carbon and nitrogen - COD removal efficiency - Long term stability - Low carbon to nitrogens - Microbial communities - Partial nitrification - Removal efficiencies Classification code:802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering - 951 Materials Science - 961 Systems Science Numerical data indexing:Age 6.85e-02yr, Age 8.22e-02yr, Mass_Density 3.70e+00kg/m3 to 2.20e-02kg/m3, Percentage 8.00e+01%, Percentage 9.00e+01%, Specific_Volume 7.50e-02m3/kg to 2.20e-02m3/kg DOI:10.13227/j.hjkx.202001209 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008938 Title:Characteristics of Surface Ozone and Impact Factors at Different Station Types During the Autumn in Guangzhou Title of translation:广州地区秋季不同站点类型地面臭氧变化特征与影响因子 Authors:Gao, Ping (1); Zhuang, Li-Yue (1); Wang, Long (2); Chen, Yu-Ping (1); Yan, Hui (1); Shen, Jin (3); Fan, Li-Ya (1, 4, 5, 6); Ye, Dai-Qi (1, 4, 5, 6) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Guangdong Province Academy of Environmental Science, Guangzhou; 510045, China; (3) Guangdong Environmental Monitoring Center, Guangzhou; 510308, China; (4) National Engineering Laboratory for Volatile Organic Compounds Pollution Control Technology and Equipment, Guangzhou; 510006, China; (5) Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou; 510006, China; (6) Guangdong Provincial Environmental Risk Control and Emergency Disposal Engineering Technology Research Center, Guangzhou; 510006, China Corresponding author:Fan, Li-Ya(fanly@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3527-3538 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Surface ozone (O3) has become the primary air pollutant in Guangzhou. Due to the influences of topography, meteorological conditions, and differences in precursor emissions, there are also large differences in the characteristics, formation mechanisms, and influencing factors of ozone in different areas of the same city. Based on the ground measurement data for October 2015 at four air quality monitoring stations that represent different types of regions in Guangzhou [urban area: Guangzhou Monitoring Center (GMC); upwind suburbs: Huadu Normal School (HNS); downwind suburbs: Panyu Middle School (PMS); Mountain area: Maofengshan (MFS)] and the WRF simulated meteorological data, the changing characteristics, influencing factors, and sensitivity of O3 were studied at each station. The results showed that the diurnal variation of O3 and NOx exhibit unimodal and bimodal characteristics (except for NOx at the MFS station). The peak ozone concentration appeared on Saturday at the GMC, HNS, and MFS stations, and on Thursday at the PMS station. The ozone concentration at the MFS station was the highest (98.61 μg•m^-3), whereas that at the GMC station was the lowest (44.83 μg•m^-3). The NOx inflection point intervals for O3 at different sites were: GMC: 55-90 μg•m^-3; PMS: 30-60 μg•m^-3; MFS: 10-20 μg•m^-3. The temperature inflection point intervals affecting the rate of O3 formation at different sites were: GMC: 28-30℃; HNS: 26-28℃; PMS: 24-26℃; however, this was not obvious at the MFS station. The relative humidity inflection point intervals were: GMC: 55%-65%; HNS and PMS: 60%-70%; MFS: 80%-85%. The wind speed(WS) of the light wind type was proportional to the O3 concentration. The O3 concentration at the PMS site was the highest in the northwest wind direction, and the O3 concentration at the MFS site was the highest in the other wind directions. By analyzing the multivariate linear fitting of impact factors on the O3 concentration, the main controlling factors at each site were: GMC: WS and T; PMS and HNS: T and RH; MFS: RH and WS. The ozone sensitivity at each site was as follows: GMC and HNS had a VOCs-limited regime, MFS had a NOx-limited regime, and PMS had a transition regime.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Ozone Controlled terms:Air quality - Meteorology - Multivariant analysis - Nitrogen oxides - Topography - Wind Uncontrolled terms:Air quality monitoring stations - Formation mechanism - Ground measurements - Main controlling factors - Meteorological condition - Meteorological data - Ozone concentration - Peak ozone concentration Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 922 Statistical Methods - 951 Materials Science Numerical data indexing:Percentage 8.00e+01% to 8.50e+01% DOI:10.13227/j.hjkx.202002097 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795586 Title:Effect of Simulated Warming on Microbial Community in Glacier Forefield Title of translation:模拟升温对冰川前缘地微生物种群的影响 Authors:Wang, Yu-Wan (1, 2, 3); Ma, An-Zhou (1, 3); Chong, Guo-Shuang (1, 3); Xie, Fei (1, 3); Zhou, Han-Chang (1, 3); Liu, Guo-Hua (1, 3); Zhuang, Guo-Qiang (1, 3) Author affiliation:(1) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) Sino-Danish College of University of Chinese Academy of Sciences, Beijing; 101400, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 101408, China Corresponding author:Ma, An-Zhou(azma@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2918-2923 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Glaciers are constantly retreating because of global warming. In this study, three soil samples along the forefield of Urumqi Glacier No. 1 were collected. The effects of warming on the microbial community in the glacier forefield were investigated through a 150-day laboratory experiment. In this experiment, two temperature treatments were performed at 5℃and 15℃. The results showed that with increasing deglaciation age, the concentrations of carbon and nitrogen increased and the abundance and alpha diversity of microbial communities increased in the original samples. The 150-day laboratory experiment indicated that warming insignificantly changed the copy number of archaea and bacteria. Furthermore, it changed the microbial community composition, and the changes varied in different sampling sites. Based on the analysis of abundant OTUs changing significantly with warming, the sampling sites with shorter deglaciation age had stronger response with warming, representing an increase in the abundance of genus Thiobacillus. Furthermore, these results revealed that warming caused different effects on microbes along glacier forefield and thus, it could provide important characteristics of the microbial community with warming in alpine glacier regions.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Bacteria Controlled terms:Forestry - Global warming Uncontrolled terms:Carbon and nitrogen - Different effects - Glacier forefield - Laboratory experiments - Microbial communities - Microbial community composition - Original sample - Temperature treatments Classification code:443.1 Atmospheric Properties Numerical data indexing:Age 4.11e-01yr DOI:10.13227/j.hjkx.201911157 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608862039 Title:Source Composition Spectrum of Volatile Organic Compounds in Typical Industries in Sichuan Title of translation:四川省典型行业挥发性有机物源成分谱 Authors:Xu, Chen-Xi (1); Chen, Jun-Hui (1); Han, Li (1); Wang, Ji-Qin (1); Wang, Bo (1) Author affiliation:(1) Sichuan Academy of Environmental Sciences, Chengdu; 610000, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3031-3041 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, typical industries that act as sources of volatile organic compound (VOCs) emission in Sichuan, including automobile manufacturing, wooden furniture, wood-based panel manufacturing, and paint production, were selected and GC-MS national standard analysis to study the organized emission VOC components of every procedure. The spectra of VOCs in the automobile industry were obtained by means of total emission normalization. The results showed that the VOC components of automobile manufacturing, wooden furniture, and oil paint manufacturing enterprises were mainly aromatic hydrocarbons and oxygen-containing compounds, accounting for more than 70% of total VOCs; the emissions from automobile part manufacturing enterprises were mainly aromatic hydrocarbons, with a ratio of over 90%. The proportion of oxygen-containing compounds in the wood-based panel manufacturing industry was found to be up to 97%, mainly caused by the emission of formaldehyde, which accounts for 75%, followed by isopropanol, acetone, and other substances. The proportion of aromatic hydrocarbon and olefin in synthetic resin enterprises is relatively high at over 80%. The olefin species are mainly 1,3-butadiene and 1-butene. Although there are some differences in emission species between different industries, they are mainly composed of aromatic hydrocarbons and oxygenates. Therefore, it is necessary to improve the identification and control of components with high concentration, activity, and toxicity for aromatic hydrocarbons and oxygenates. The source, process, and end process control should be monitored to achieve the effect of total emission reduction.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Automotive industry Controlled terms:Acetone - Aromatic hydrocarbons - Aromatization - Automobile manufacture - Automobiles - Emission control - Mineral oils - Olefins - Paint - Process control - Synthetic resins - Volatile organic compounds Uncontrolled terms:Automobile manufacturing - Automobile parts - Manufacturing industries - National standard - Oxygen-containing compounds - Paint production - Source composition - Wood-based panels Classification code:451.2 Air Pollution Control - 513.3 Petroleum Products - 662.1 Automobiles - 802.2 Chemical Reactions - 804.1 Organic Compounds - 813.2 Coating Materials - 815.1.1 Organic Polymers Numerical data indexing:Percentage 7.00e+01%, Percentage 7.50e+01%, Percentage 8.00e+01%, Percentage 9.00e+01%, Percentage 9.70e+01% DOI:10.13227/j.hjkx.201911118 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371186 Title:Effects of Fertilizer Reduction and Application of Organic Fertilizer on Soil Nitrogen and Phosphorus Nutrients and Crop Yield in a Purple Soil Sloping Field Title of translation:化肥减量有机替代对紫色土旱坡地土壤氮磷养分及作物产量的影响 Authors:Zhu, Hao-Yu (1); Gao, Ming (1); Long, Yi (2); Xu, Guo-Xin (1); Wang, Fu-Hua (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:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1921-1929 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The reduction in chemical fertilizers combined with organic fertilizers is a national strategy to achieve environmental friendliness and maintain the quality of cultivated land. It is of great significance for the prevention and control of soil pollution and the sustainable development of agriculture. In this study, purple soil and sloping land in the Three Gorges Reservoir area was studied. The field experiment method was used to study the control, conventional fertilization, optimized fertilization, biochar (fertilizer combined with biochar), and straw under rapeseed/corn rotation mode. The effects of five treatments on soil nitrogen/phosphorus form, crop nitrogen and phosphorus content, fertilizer utilization rate, and crop yield were studied in the field (fertilizer reduction combined with straw returning). The results showed that the soil ammonium nitrogen content was the highest in the rapeseed season, which was 4.51 mg•kg^-1. The contents of ammonium nitrogen and alkali nitrogen in the treated corn season were significantly higher than those in the rape season. The reduction in chemical fertilizers can guarantee and increase the total nitrogen content of the soil. Among them, the total nitrogen content in the rapeseed and corn seasons treated with straw was the highest (0.56 g•kg^-1 and 0.60 g•kg^-1, respectively). The soil treated with straw in the rapeseed season had the highest available phosphorus content (0.76 mg•kg^-1). Compared with conventional treatment, the reduction of chemical fertilizers combined with organic fertilizer did not significantly reduce the total phosphorus content of soil. The reduction of fertilization combined with organic fertilizer showed a slight increase in yield but showed the highest yield of rapeseed treated by biochar (2 328 kg•hm^-2) and the highest yield of conventionally treated maize (5 838 kg•hm^-2). However, there was no significant difference in each treatment (P>0.05). Regardless of the rapeseed season or the corn season, the reduction of fertilization treatment generally improved the agronomic utilization rate of nitrogen fertilizer and phosphate fertilizer. In the purple soil area, the combination of chemical fertilizer reduction and biochar and straw returning were beneficial to improve soil nutrients, improve fertilizer utilization, and reduce the effects of nitrogen fertilizer and phosphate fertilizer application on crop yield.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Nitrogen fertilizers Controlled terms:Agricultural robots - Crops - Nutrients - Oilseeds - Phosphate fertilizers - Phosphorus - Soil pollution - Soil pollution control - Soils - Sustainable development Uncontrolled terms:Bio chars - Conventional treatments - Environmental friendliness - Fertilizer applications - Prevention and controls - Soil nutrients - Three gorges reservoir area - Total nitrogen content Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.2 Agricultural Chemicals - 821.4 Agricultural Products DOI:10.13227/j.hjkx.201909153 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106356 Title:Inventory and Distribution Characteristics of China's Thermal Power Emissions Under Ultra-Low Reconstruction Title of translation:超低改造下中国火电排放清单及分布特征 Authors:Qu, Jia-Bao (1); Wang, Peng (1, 2); Bo, Xin (1); Xue, Xiao-Da (1, 3); Dong, Guang-Xia (4); Cui, Lei (5); Kang, Ming-Xiong (6); Wang, Tong (7); Tang, Ling (3, 8); Zhu, Fa-Hua (9); Li, Shi-Bei (1) Author affiliation:(1) Appraisal Center for Environment and Engineering, Ministry of Ecology and Environment, Beijing; 100012, China; (2) College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing; 100029, China; (3) School of Economics and Management, Beihang University, Beijing; 100191, China; (4) China National Environmental Monitoring Center, Beijing; 100012, China; (5) Zhongsheng Environmental Technology Development Co., Ltd., Xi'an; 710000, China; (6) Fujian Environmental Protection Design Institute Co., Ltd., Fuzhou; 350012, China; (7) Shaanxi Environmental Investigation and Assessment Center, Xi'an; 710000, China; (8) School of Economics and Management, Beijing University of Chemical Technology, Beijing; 100029, China; (9) State Power Environmental Protection Research Institute, Nanjing; 210031, China Corresponding author:Bo, Xin(boxin@acee.org.cnemaillisb@acee.org.cn)Li, Shi-Bei(lisb@acee.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3969-3975 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study updates a bottom-up high-resolution emission inventory and estimates the concentrations, emission factors, emissions, and performance values of China's power plants, based on the data from continuous emission monitoring systems and environmental statistics in 2018. The results show that the ultra-low emission policy has significant effects: the average concentrations of SO2, NOx, and PM in thermal power plants were 37.57, 56.71, and 7.41 mg•m^-3, respectively in 2018, which were 58.71%, 43.12%, and 60.79% lower than those in 2015. The average emission factors of SO2, NOx, and PM from coal-fired units in China were 0.3, 0.48, and 0.06 g•kg^-1, respectively, which were 55.2%, 36.84%, and 62.5% lower than those in 2015. The total emissions of SO2, NOx, PM, and PM2.5in thermal power plants were 721.4, 1 183.8, 149.0, and 135.9 kt•a^-1, respectively, down by 41.32%, 19.29%, 48.12%, and 40.39% from 2015.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Monitoring Controlled terms:Nitrogen oxides - Thermoelectric power plants Uncontrolled terms:Average concentration - Continuous emission monitoring system - Distribution characteristics - Emission factors - Environmental statistics - High-resolution emission - Performance value - Thermal power plants Classification code:615.4 Thermoelectric Energy - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.93e+01%, Percentage 3.68e+01%, Percentage 4.04e+01%, Percentage 4.13e+01%, Percentage 4.31e+01%, Percentage 4.81e+01%, Percentage 5.52e+01%, Percentage 5.87e+01%, Percentage 6.08e+01%, Percentage 6.25e+01% DOI:10.13227/j.hjkx.202001042 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008903 Title:Evaluation of Different ISORROPIA-Ⅱ Modes and the Influencing Factors of Aerosol pH Based on Tianjin Online Data Title of translation:基于天津市在线数据评估ISORROPIA-Ⅱ模式结果及气溶胶pH的影响因素 Authors:Gao, Jie (1); Shi, Xu-Rong (1, 2); Wei, Yu-Ting (1); Song, Shao-Jie (3); Shi, Guo-Liang (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; (2) Center for Regional Air Quality Simulation and Control, Chinese Academy for Environmental Planning, Beijing; 100012, China; (3) School of Engineering and Applied Sciences, Harvard University, Cambridge; MA; 02138, United States Corresponding author:Shi, Guo-Liang(nksgl@nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3458-3466 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Aerosol acidity is closely related to particle properties and the explosive growth of secondary particles. Aerosol pH is difficult to measure directly but can be estimated indirectly by thermodynamic equilibrium modeling. ISORROPIA-Ⅱ is one of the most commonly used thermodynamic models and includes different modes (forward and reverse) and aerosol states (stable and metastable). Studies have shown that the calculated pH results vary with the selected mode and phase state. In addition to the selection of modes and phases, there are also other factors that influence the modeling results. In order to explore the appropriate mode and phase selection of ISORROPIA-Ⅱ as well as the factors influencing the model results under the air pollution characteristics of typical Chinese cities, the simulation results of different modes and aerosol states were analyzed by using online hourly data for Tianjin. The results showed that the pH calculations using the forward mode and metastable state were satisfactory at a higher RH. With increased temperature, the pH, aerosol water content, and concentration proportion in the aerosol phase of semi-volatile components all decreased. RH affected aerosol pH by influencing the aerosol water content and concentration of semi-volatile components. An increased cation concentration led to an increased pH and NH3 concentration but a decreased HNO3 concentration, whereas an increased anion concentration had the opposite effect. Ca²⁺, SO4^2-, NO3^-, and NH4⁺ had a great influence on pH. Compared with SO4^2-, NO3^- had less effect on pH. Sensitive areas exist in the influence of NH4⁺ on pH, and a high NH4⁺ concentration did not cause a continuous pH increase. This study can improve the understanding of aerosol pH simulation using ISORROPIA-Ⅱ, and provides reference for research on the pH-related secondary generation mechanism, semi-volatile component gas-particle distribution, and pollution control measures.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:pH effects Controlled terms:Aerosols - Air pollution - Ammonia - Pollution control Uncontrolled terms:Anion concentrations - Cation concentrations - Generation mechanism - Hno3 concentrations - Increased temperature - Particle properties - Thermodynamic equilibrium model - Volatile components Classification code:451 Air Pollution - 801.1 Chemistry, General - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201912221 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105373 Title:Establishment and Spatial Distribution of Anthropogenic Ammonia Emission Inventory in Zhejiang Province Title of translation:浙江省人为源氨排放清单建立及分布特征 Authors:Zhao, Rui-Dong (1); Yu, Xing-Na (1); Hou, Xin-Hong (1); Shen, Li (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3976-3984 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The ammonia emissions inventory of Zhejiang Province was established in 2017 using the activity data of various ammonia emission sources, emission factors, and an estimation method. Ammonia emissions for each source and city in Zhejiang Province were analyzed. The spatial distribution and intensity of ammonia emissions in 2017 were mapped using ArcGIS software. The total anthropogenic ammonia emissions in Zhejiang Province in 2017 were 122.00 kt. The farmland ecosystem was the major source of total ammonia emissions (36.06 kt), and nitrogen fertilizer applications was the largest contributor in this category (87.12%), followed by the livestock and poultry source (29.44%). The waste and human-activity sources were the two major non-agricultural sources, accounting for 44.07% and 28.49%, respectively. Hangzhou City had the highest ammonia emissions in 2017, accounting for 17.83% of the total ammonia emissions in Zhejiang Province. However, the ammonia emission intensity in Jiaxing City was the highest, reaching 3.82 t•km^-2. The spatial distribution map revealed that ammonia emissions in the northern and southeastern Zhejiang were relatively higher, while ammonia emission intensity was higher in the northern and northeastern region.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Ammonia Controlled terms:Agricultural robots - Agriculture - Ecosystems - Nitrogen fertilizers - Spatial distribution Uncontrolled terms:Ammonia emissions - Arcgis softwares - Estimation methods - Farmland ecosystem - Fertilizer applications - Non-agricultural sources - Spatial distribution map - Zhejiang Province Classification code:454.3 Ecology and Ecosystems - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics Numerical data indexing:Percentage 1.78e+01%, Percentage 2.85e+01%, Percentage 2.94e+01%, Percentage 4.41e+01%, Percentage 8.71e+01% DOI:10.13227/j.hjkx.202001207 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658206 Title:Occurrence and Ecological Risk of Eight Typical PhACs in Surface Water and Its Impact on Daphnia magna Title of translation:8种典型PhACs在水中的赋存,生态风险及其对大型溞的影响 Authors:Xu, Xin-Lei (1); Liu, Jian-Chao (1); Lu, Guang-Hua (1) Author affiliation:(1) Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes, College of Environment, Hohai University, Nanjing; 210098, China Corresponding author:Liu, Jian-Chao(jianchao-liu@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2239-2246 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The occurrence and risk assessment of eight typical pharmaceutical active compounds (PhACs) in a receiving water body of wastewater treatment plant effluent were investigated. The results showed that the total concentrations of eight PhACs in summer and winter ranged from 27.6 to 226.4 ng•L^-1 and 56.6 to 368.8 ng•L^-1, respectively. The concentration of caffeine (16.2-125.8 ng•L^-1) was highest, followed by roxithromycin (3.3-89.2 ng•L^-1) and ibuprofen (3.6-59.2 ng•L^-1). The total ecological risks (mixture risk quotients, MRQ) of eight PhACs to green algae, daphnia, and fish were 1.51, 0.08, and 5.68 in summer and 8.34, 0.22, and 6.45 in winter, respectively. The contribution rates of ketoconazole, erythromycin, and ibuprofen exceeded 49%, 85%, and 92% for MRQ in green algae, daphnia, and fish, respectively. In terms of sensitive species, green algae and fish are the most sensitive to PhACs in winter and summer, respectively. The results of 21 d chronic toxicity showed that mixed PhACs effect normal development and reproduction of Daphnia magna, resulting in an increase in reproductive capacity and swimming activity, and a reduction in heart rate and thoracic limb activity.
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Surface waters Controlled terms:Algae - Cell proliferation - Drug products - Effluent treatment - Effluents - Fish - Risk assessment - Sewage treatment plants - Wastewater treatment - Water treatment Uncontrolled terms:Chronic toxicity - Contribution rate - Pharmaceutical active compounds - Receiving water bodies - Reproductive capacity - Sensitive species - Swimming activity - Wastewater treatment plant effluent Classification code:444.1 Surface Water - 445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.9 Biology - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.62e-08kg/m3 to 1.26e-07kg/m3, Mass_Density 2.76e-08kg/m3 to 2.26e-07kg/m3, Mass_Density 3.30e-09kg/m3 to 8.92e-08kg/m3, Mass_Density 3.60e-09kg/m3 to 5.92e-08kg/m3, Mass_Density 5.66e-08kg/m3 to 3.69e-07kg/m3, Percentage 4.90e+01%, Percentage 8.50e+01%, Percentage 9.20e+01% DOI:10.13227/j.hjkx.201910089 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105055 Title:Pollution Characteristics and Risk Assessment of Antibiotics in Lianhua Reservoir Title of translation:莲花水库水体中抗生素污染特征及生态风险评价 Authors:Liao, Jie (1); Wei, Xiao-Qin (1); Xiao, Yan-Qin (1); Li, Qing-Song (1); Fan, Hong-Yong (2); Liu, Xue-Jun (3); Zhuang, Ma-Zhan (4); Liu, Chao-Xiang (2) Author affiliation:(1) Key Laboratory of Environmental Biotechnology, School of Environmental Science and Engineering, Xiamen University of Technology, Xiamen; 361024, China; (2) Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (3) Sinosteel Tiancheng Environmental Protection Science & Technology Company, Wuhan; 430205, China; (4) Xiamen Institute of Environmental Sciences, Xiamen; 361021, China Corresponding author:Liu, Chao-Xiang(cxliu@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4081-4087 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Thirteen typical antibiotics in surface water of the Lianhua Reservoir were analyzed using HPLC/MS/MS to assess the pollution characteristics and risk levels. Ten antibiotics except for erythromycin, sulfadiazine, and sulfamethoxazole were detected in surface water and the total concentration of antibiotics varied between non-detectable (n.d.) and 925.26 ng•L^-1. Azithromycin had the highest concentration (n.d.-232.61 ng•L^-1) with the detection frequency of 75%, followed by enrofloxacin (n.d.-187.69 ng•L^-1), tetracycline (n.d.-155.05 ng•L^-1), and ciprofloxacin (n.d.-83.66 ng•L^-1) with the detection frequencies over 60%. The spatial distribution of antibiotics was as follows: total concentration of upstream (sampling point 1)>Aoxi River stream tributary (sampling point 2)>reservoir downstream (sampling point 3)>reservoir entrance (sampling point 4)>reservoir area (sampling point 5). The seasonal variations in the concentrations of antibiotics were evident; total concentrations in the dry season were significantly higher than those in the wet and normal seasons. The results of the environmental risk assessment indicated that ofloxacin, enrofloxacin, and ciprofloxacin pose significant risks to the environment. In the Lianhua Reservoir, ciprofloxacin showed high potential risk to the ecological environment, while the environmental risks of other antibiotics in the reservoir were below the medium level. The combined risk value of the antibiotics in the dry season was higher than that in the wet and normal seasons.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:River pollution Controlled terms:Antibiotics - Drought - Reservoirs (water) - Risk assessment - Rivers Uncontrolled terms:Detection frequency - Ecological environments - Environmental risk assessment - Environmental risks - Reservoir area - Sampling points - Seasonal variation - Sulfamethoxazole Classification code:441.2 Reservoirs - 444 Water Resources - 453 Water Pollution - 461.6 Medicine and Pharmacology - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 9.25e-07kg/m3 to 2.20e-02kg/m3, Percentage 6.00e+01%, Percentage 7.50e+01% DOI:10.13227/j.hjkx.202002084 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517640 Title:Endogenous Pollution and Release Characteristics of Bottom Sediments of Hengshan Reservoir in Yixing City Title of translation:宜兴市横山水库底泥内源污染及释放特征 Authors:Cui, Hui-Fang (1); Chen, Shu-Yun (2); Yang, Chun-Hui (3); Tang, Wan-Ying (1); Yin, Peng (4); Yin, Hong-Bin (3) Author affiliation:(1) School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing; 210094, China; (2) Yixing Hengshan Reservoir Management Office, Yixing; 214200, China; (3) Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (4) Jiangsu Water Resources Service Center, Nanjing; 210029, China Corresponding author:Tang, Wan-Ying(wytang@njust.edu.cnemailhbyin@niglas.ac.cn)Yin, Hong-Bin(hbyin@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5400-5409 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To clarify the endogenous pollution and release characteristics of the bottom sediment of Hengshan Reservoir in Yixing City, a typical section of the reservoir was sampled and analyzed. The research results show that the average concentrations of total nitrogen, total phosphorus, and organic matter in the surface sediments of Hengshan Reservoir are 2778 mg•kg^-1, 899 mg•kg^-1, and 3.1%, respectively. The endogenous pollution is serious, and the downstream sediments are highly polluted upstream of the reservoir. Phosphorus spectroscopic analysis results show that iron-bound phosphorus (Fe-P) and aluminum-bound phosphorus (Al-P) are the main bound phosphorus forms in the sediment, accounting for 28% and 39% of the total phosphorus, respectively. The average concentration of activated phosphorus in the sediment (combination of weakly adsorbed phosphorus, organic phosphorus, and iron phosphorus) is 255 mg•kg^-1, accounting for 38% of the total phosphorus. The average release rates of nitrogen and phosphorus in sediments were 18.0 mg•(m²•d)^-1and 0.60 mg•(m²•d)^-1. The correlation analysis results show that the organic matter content of the sediment is significantly correlated with the diffusion flux of phosphate, ammonia nitrogen, and ferrous iron (P<0.05), indicating that the mineralization of organic matter in the sediment may be the main release source of nitrogen and phosphorus in the sediment influencing factors.
© 2020, Science Press. All right reserved. Number of references:48 Main heading:Phosphorus Controlled terms:Aluminum compounds - Aluminum metallography - Ammonia - Biogeochemistry - Iron - Iron compounds - Iron metallography - Nitrogen - Organic compounds - Phosphorus compounds - Pollution - Sediments - Spectroscopic analysis Uncontrolled terms:Ammonia nitrogen - Average concentration - Correlation analysis - Nitrogen and phosphorus - Organic matter content - Organic phosphorus - Release characteristics - Surface sediments Classification code:483 Soil Mechanics and Foundations - 531.2 Metallography - 545.1 Iron - 801 Chemistry - 801.2 Biochemistry - 804 Chemical Products Generally Numerical data indexing:Percentage 2.80e+01%, Percentage 3.10e+00%, Percentage 3.80e+01%, Percentage 3.90e+01% DOI:10.13227/j.hjkx.202004253 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952745 Title:Size Distribution of Particulate Chemical Components in Nanjing Jiangbei New Area Title of translation:南京江北新区大气颗粒物化学组分的粒径分布特征 Authors:Zhang, Yu-Xiu (1); Yu, Xing-Na (1); Liu, Si-Jia (1); An, Jun-Lin (1); Zhang, Cheng (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecasting and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4803-4812 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the pollution characteristics of the chemical components of atmospheric particulate matter in Nanjing Jiangbei New Area, size-resolved samples were collected from 2013 to 2014. The size distribution and seasonal variation of the chemical components of the particles were studied. The results showed that the total concentration of nine water-soluble ions in fine particles was higher in autumn and winter than in spring and summer, while the concentration of coarse particles was highest in winter. The ratio of NO3^-/SO4^2- for the fine particles in winter was slightly higher than in the other three seasons, and lowest in the coarse particles. The trend of particle size distribution in spring, summer and autumn was consistent. The distribution of water-soluble ions was bimodal, and NO3^- peaked at 0.65- 1.1μm in all four seasons. The peak radius of SO4^2- in the fine particles in summer and autumn was 0.43- 0.65μm, and the peak value in winter moved towards the coarser particles, while Na⁺ and Cl^- mainly existed in the coarse particles. The charge equivalent of anion and anion indicated that the coarse and fine particles were alkaline and weakly alkaline, respectively. Organic carbon (OC) and elemental carbon (EC) mainly existed in the fine particles, with a bimodal distribution. The secondary organic carbon (SOC) in the fine particles in autumn and winter was significantly higher than in spring and summer. The ratio method further indicated that the carbonaceous component of the particulate matter in Nanjing Jiangbei New Area is mainly from the emissions of coal and biomass combustion, and vehicle exhaust.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Particles (particulate matter) Controlled terms:Alkalinity - Coal combustion - Ions - Organic carbon - Particle size - Particle size analysis - Size distribution - Springs (components) Uncontrolled terms:Atmospheric particulate matter - Bimodal distribution - Carbonaceous components - Chemical component - Distribution of water - Particulate Matter - Secondary organic carbons (SOC) - Water-soluble ions Classification code:521 Fuel Combustion and Flame Research - 524 Solid Fuels - 601.2 Machine Components - 801.1 Chemistry, General - 804.1 Organic Compounds - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Size 4.30e-07m to 6.50e-07m, Size 6.50e-07m to 1.10e-06m DOI:10.13227/j.hjkx.202004213 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952747 Title:Metal Distributions and Human Health Risk Assessments on Waters in the Huixian Karst Wetland, China Title of translation:会仙岩溶湿地水体金属元素分布与健康风险评价 Authors:Li, Jun (1, 2, 3); Zou, Sheng-Zhang (1, 3); Liang, Yong-Ping (1, 3); Lin, Yong-Sheng (1, 3); Zhou, Chang-Song (1, 3); Zhao, Yi (1, 3) Author affiliation:(1) Key Laboratory of Karst Dynamics, Ministry of Natural Resources/Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources, Department of Municipal and Environmental Engineering, Hebei University of Architecture, Zhangjiakou; 075000, China; (3) International Research Center on Karst under the Auspices of United Nations Educational, Scientific and Cultural Organization, Guilin; 541004, China Corresponding author:Zhao, Yi(zhaoyi@karst.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4948-4957 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The concentrations of nine metals (As, Cr, Al, Cu, Pb, Zn, Ni, Mn, and Hg), in 23 water samples collected from four main types of water (well, surface river, subterranean stream and blue hole), in the Huixian karst wetland were determined and analyzed to investigate their distributions and health risks. A multivariate statistical analysis was used to study the distribution characteristics of the metals. A human health risk assessment model was developed to assess the health risks. The results found that the mean concentrations of metals in water from the Huixian karst wetland were in the order: Al>Mn>Zn>Cr>Ni>As>Hg>Cu>Pb. The maximum concentrations of Hg (1.08 μg•L^-1) in the well water, Hg (0.78 μg•L^-1) and Mn (259.00 μg•L^-1) in the surface river water, and Hg (0.47 μg•L^-1) and Al (300.00 μg•L^-1) in the blue hole water all exceeded the corresponding standard limits. The metal concentrations in the subterranean stream samples were all within the regulated limits. For the nine metals, the well water and the subterranean stream water qualities were better than those of the surface river and the blue hole. The results of the multivariate statistical analysis showed that the concentrations of Cr, Ni, Cu, and Zn in the well water were mainly related to the regional geological background, while the concentrations of Al and Pb in the blue hole water were mainly affected by pyrite mining and residential activities. The concentrations of As and Mn in rivers may be affected by tourism activity, aquaculture and river sediments. The results of the health risk assessment on water through the drinking and skin penetration pathway indicated that the total health risks order was: well>subterranean stream>blue hole>surface river. The total health risks values of well water as drinking water for adults (6.11×10^-5 a^-1) and children (6.67×10^-5 a^-1) exceeded the maximum allowance level (5.0×10^-5 a^-1). Cr was the main metal element that causes carcinogenic risks. For drinking water safety, the concentrations of Hg and Cr in well water should be controlled before drinking.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Rivers Controlled terms:Electron emission - Health - Health risks - Manganese removal (water treatment) - Metals - Multivariant analysis - Pollution - Potable water - Pyrites - Risk assessment - Water quality - Wetlands Uncontrolled terms:Distribution characteristics - Geological background - Human health risk assessment - Maximum concentrations - Metal concentrations - Metal distributions - Multivariate statistical analysis - Stream water quality Classification code:444 Water Resources - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 461.6 Medicine and Pharmacology - 461.7 Health Care - 914.1 Accidents and Accident Prevention - 922 Statistical Methods Numerical data indexing:Mass_Density 1.08e-06kg/m3 to 2.20e-02kg/m3, Mass_Density 2.59e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 3.00e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 4.70e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 7.80e-07kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202003212 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953306 Title:Risk Ranking of Endocrine Disrupting Compounds, Pharmaceuticals, and Personal Care Products in the Aquatic Environment of the Yangtze River Basin Title of translation:长江流域淡水生态系统内分泌干扰物, 药物和个人护理品的风险排序 Authors:Su, Chao (1); Cui, Yan (2) Author affiliation:(1) Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China; (2) College of Environmental & Resource Sciences, Shanxi University, Taiyuan; 030006, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4981-4988 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Endocrine disrupting compounds (EDCs), pharmaceuticals, and personal care products (PPCPs) have been of great concern as emerging contaminants of aquatic environments. In this study, the risks of EDCs and PPCPs in the Yangtze River Basin were ranked, based on their environmental exposure datasets and ecotoxicity datasets. The prioritized chemicals were then identified. The results found that EDCs and personal care products were deemed to represent higher risks to aquatic organisms, for example, estrone, estriol, 17β-estradiol, bisphenol S, atrazine, triclocarban, and triclosan, while the risks of pharmaceuticals were 500-fold lower. Among the pharmaceuticals, antibiotics posed relatively higher risks. The Xiangjiang River and Honghu Lake with its surrounding rivers were hotspots where more chemicals were found with the highest concentrations, followed by Taihu Lake, Dongting Lake and the Yangtze River Delta. When comparing with algae and worms, fish were the most sensitive taxa to 17β-estradiol and 17α-ethynylestradiol. The results of this work provide sound guidance for the future monitoring and management of chemicals in China.
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Endocrine disrupters Controlled terms:Antibiotics - Aquatic organisms - Chemicals - Endocrinology - Lakes - Rivers - Watersheds Uncontrolled terms:Aquatic environments - Emerging contaminant - Endocrine disrupting compound - Environmental exposure - Monitoring and management - Personal care products - Yangtze River basin - Yangtze river delta Classification code:444.1 Surface Water - 461.6 Medicine and Pharmacology - 461.7 Health Care - 471 Marine Science and Oceanography - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202003210 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861842 Title:Effects of Aeration Strategy on Denitrifying Performance of Activated Sludge Processes in Treating Low-Carbon-Source Municipal Wastewater Title of translation:低碳源条件下供氧模式对活性污泥系统脱氮性能的影响 Authors:Zhang, Xin-Rui (1); Chi, Yu-Lei (1); Wang, Qian (1); Jin, Xin (1); Shi, Xuan (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:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3356-3364 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the effects of aeration strategy on nitrogen removal performance of activated sludge processes in treating low-carbon-source municipal wastewater were investigated. Two aeration strategies (continuous aeration (CA) and intermittent aeration (IA)) were evaluated, and the long-term performance of activated sludge processes employing these strategies in treating wastewater with C/N=3 were analyzed. The results demonstrated that the total nitrogen removal efficiency in CA was 17.92% higher than that in the IA process. Meanwhile, the carbon source utilized in nitrogen removal in CA was 44.29% higher compared with the IA process. Furthermore, the results of 16S rRNA sequencing showed that relative abundances of denitrifying bacteria in CA and IA were 5.86% and 2.06%, respectively, suggesting that the CA process has better denitrification ability when treating low-carbon-source wastewater. In addition, 16S rRNA sequencing gene prediction was utilized to analyze the in-depth mechanisms. The results demonstrated that genes involved in membrane transport, carbohydrate metabolism, and cell composition were more highly expressed in CA. The enhancement of metabolic activity under continuous aeration strengthened microbial carbon source utilization. Therefore, the activated sludge process under continuous aeration was more efficient in treating low-carbon-source municipal wastewater. This study provides ideas for low-carbon-source municipal wastewater treatment.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Activated sludge process Controlled terms:Bacteria - Carbon - Denitrification - Genes - Metabolism - Nitrogen removal - RNA - Wastewater treatment Uncontrolled terms:Carbohydrate metabolism - Denitrifying bacteria - Intermittent aeration - Long term performance - Microbial carbon sources - Municipal wastewater treatment - Municipal wastewaters - Total nitrogen removal Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Percentage 1.79e+01%, Percentage 2.06e+00%, Percentage 4.43e+01%, Percentage 5.86e+00% DOI:10.13227/j.hjkx.201912037 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861848 Title:Effects of Controlled-Release Urea Application on N2O Emission in Maize-Cultivated Sandy Loam Soil Title of translation:控释尿素对黄河故道沙性潮土 N2O排放的影响 Authors:Jiang, You-Jin (1, 2); Yuan, Jun-Ji (2); Ding, Wei-Xin (2); Liu, Yang (1); Zhang, Song-Lin (1) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China; (2) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Zhang, Song-Lin(zhangsonglin65@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3402-3409 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A field experiment was conducted in maize-cultivated sandy loam soil in the old flooded area of the Yellow River to evaluate the responses of N2O emissions to application of different type of controlled-release urea. An inorganic N fertilizer was applied at 270 kg•hm^-2 during the maize season. Urea was applied alone and in combination with sulfur-coated urea (SCU) or polyurethane-coated urea (PCU) at N ratios of 30%:70%, 50%:50%, and 70%:30%, respectively. Cumulative N2O emission under urea treatment alone (CN) was 1.78 kg•hm^-2 with a N2O emission factor of 0.38%. In comparison to CN, 70% urea+30% SCU, 50% urea+50% SCU, and 30% urea+70% SCU treatments reduced N2O emission by 1.12%, 22.5%, and 11.2%, respectively. In contrast, application of urea in combination with PCU (with the proportion varied from 30%-70%) increased N2O emission by 0.02-0.41 kg•hm^-2 compared with the CN, while 30% urea+70% PCU treatment showed a 23.0% increase. Regression analysis showed that N2O flux was significantly (P<0.01) correlated with soil temperature at 10 cm depth and concentrations of soil NH4⁺-N and NO3^--N in all the treatments, but not with soil moisture or dissolved organic carbon concentration. Compared with the CN, the 50% urea+50% SCU and 50% urea+50% PCU treatments slightly, but not significantly, increased the maize yield, whereas the 30% urea+70% SCU treatment showed a reduction effect. Overall, the mitigation effect of controlled-release urea on N2O emission may primarily depend on its coating material and application rate.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Soil pollution Controlled terms:Metabolism - Organic carbon - Regression analysis - Soil conditioners - Soil moisture - Urea Uncontrolled terms:Application rates - Controlled release - Dissolved organic carbon - Inorganic N fertilizer - Mitigation effects - Reduction effects - Sandy loam soils - Soil temperature Classification code:483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.12e+00%, Percentage 1.12e+01%, Percentage 2.25e+01%, Percentage 2.30e+01%, Percentage 3.00e+01%, Percentage 3.00e+01% to 7.00e+01%, Percentage 3.80e-01%, Percentage 5.00e+01%, Percentage 7.00e+01%, Size 1.00e-01m DOI:10.13227/j.hjkx.201911169 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990449 Title:Effects of Straw Biochar on Soil Microbial Metabolism and Bacterial Community Composition in Drip-irrigated Cotton Field Title of translation:秸秆炭化还田对滴灌棉田土壤微生物代谢功能及细菌群落组成的影响 Authors:Wang, Jing (1); Ma, Li-Juan (1); Long, Ze-Hua (1); Min, Wei (1); Hou, Zhen-An (1) Author affiliation:(1) Key Laboratory of Oasis Ecological Agriculture of Xinjiang Corps, College of Agriculture, Shihezi University, Shihezi; 832003, China Corresponding author:Hou, Zhen-An(hzatyl@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:420-429 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A five year field experiment was conducted to evaluate the effect of continually returning cotton straw or biochar on microbial metabolic function and bacterial community composition of soil in a cotton field under drip irrigation conditions. The experiment involved three treatments: control (single application of chemical fertilizer, CK), cotton straw (returning of cotton straw plus chemical fertilizer application, ST), and biochar (returning of cotton straw biochar plus chemical fertilizer application, BC). The returning of cotton straw and biochar both significantly increased soil organic matter, total nitrogen, and available nutrients, but the effect of returning biochar was more significant. The carbon source metabolic activities of the soil in the ST treatment was the highest, followed by the BC treatment, which was significantly higher than of that in the CK treatment. The returning of cotton straw promoted the metabolism of carbohydrate and amine carbon sources, while biochar significantly increased the metabolism of polymer carbon sources. Compared with the CK treatment, the ST treatment significantly increased the phylum of Proteobacteria, Actinobacteria, Bacteroides, and the family of Xanthomonadaceae, Acidobacteriaceae, Microbacteriaceae, and Cytophagaceae. The BC treatment significantly increased the phylum of Acidobacteria, Gemmatimonadetes, Nitrospirae, and the family of Blastocatellaceae (subgroup 4), Gemmatimonadaceae, and Nitrosomonadaceae. The correlation analysis showed that there were significant positive correlations between the relative abundances of Xanthomonadaceae and Acidobacteriaceae and the carbon source metabolic activities of carbohydrates, amino acids, carboxylic acids, and amines. The relative abundances of Microbacteriaceae and Cytophagaceae were positively correlated with carbohydrates and amines. There was a significant positive correlation between the relative abundance of Blastocatellaceae (subgroup 4), Gemmatimonadaceae, Nitrosomonadaceae and the carbon metabolism of polymers. These results suggest that the continual returning of biochar increased soil nutrients, change bacterial community composition, and promoted the metabolic activity of polymer carbon sources in the drip-irrigated cotton field.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Metabolism Controlled terms:Amines - Bacteria - Bacteriology - Carbohydrates - Carbon - Cotton - Fertilizers - Irrigation - Nutrients - Polymers - Soils Uncontrolled terms:Available nutrients - Bacterial community composition - Chemical fertilizers - Correlation analysis - Metabolic activity - Positive correlations - Relative abundance - Soil organic matters Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds - 815.1 Polymeric Materials - 821.3 Agricultural Methods - 821.4 Agricultural Products DOI:10.13227/j.hjkx.201907183 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796177 Title:Emission Factors and Emission Inventory of Agricultural Machinery in Beijing Under Real-world Operation Title of translation:北京市农业机械排放因子与排放清单 Authors:Wang, Kai (1, 2); Fan, Shou-Bin (1, 3); Qi, Hao-Yun (1, 4) Author affiliation:(1) Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China; (3) National Engineering Research Center of Urban Environmental Pollution Control, Beijing; 100037, China; (4) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China Corresponding author:Fan, Shou-Bin(fanshoubin@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2602-2608 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study aimed to establish the emission factors and the emission inventory of agricultural machinery in Beijing in 2017 under real-world operation. The emissions of typical harvesters, tractors, agricultural transport vehicles, and farm construction machinery under real-world operation were tested by a portable emission measurement system. The results showed that different operation modes have a greater impact on the tailpipe emissions of agricultural machinery. The CO, NOx, HC, and PM emissions were relatively stable when the engine is idling and moving compared to when the excavator is performing actual work. According to the classification and emission standards of various types of machinery, a relatively perfect emission factor system of agricultural machinery in Beijing was established, which can provide reference and support for relevant research and management decisions. According to the emission factors of agricultural machinery and fuel consumption in Beijing, the emissions of CO, NOx, HC, and PM in 2017 were 2 566.60, 1 239.29, 563.08, and 538.32 t, respectively. The total pollutants of transport machinery, tractors, and combined harvester accounted for 98%, 95%, 95%, and 98% of the total concentrations of CO, NOx, HC, and PM, respectively. Therefore, transport machinery, tractor, and combined harvester should be the key control objects in the reduction of agricultural machinery pollution.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Agriculture Controlled terms:Agricultural robots - Construction equipment - Decision support systems - Harvesters - Nitrogen oxides - Pollution control - Tractors (agricultural) - Tractors (truck) Uncontrolled terms:Construction machinery - Emission inventories - Emission measurement systems - Emission standard - Management decisions - Real world operations - Tailpipe emission - Transport vehicles Classification code:405.1 Construction Equipment - 663.1 Heavy Duty Motor Vehicles - 723 Computer Software, Data Handling and Applications - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.1 Agricultural Machinery and Equipment Numerical data indexing:Percentage 9.50e+01%, Percentage 9.80e+01% DOI:10.13227/j.hjkx.201912005 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796171 Title:Spatial Distribution Characteristics and Pollution Evaluation of Heavy Metals in Arable Land Soil of China Title of translation:中国农田土壤重金属空间分布特征及污染评价 Authors:Chen, Wen-Xuan (1); Li, Qian (2); Wang, Zhen (2); Sun, Zhao-Jun (1, 2) Author affiliation:(1) College of Resources and Environment, Ningxia University, Yinchuan; 750021, China; (2) Institute of Environmental Engineering, Ningxia University, Yinchuan; 750021, China Corresponding author:Wang, Zhen(wangzhen001.cool@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2822-2833 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil is an important component of the terrestrial ecosystem and an indispensable natural resource in agricultural production. Understanding the spatial distribution characteristics and pollution levels of heavy metals in arable land soil is important to safeguard the agriculture ecosystem and human health. Based on the collected data of heavy metal concentrations in arable land soil in various administrative regions of China since 2002, first, we selected and removed the abnormal values, then obtained the spatial distribution of the provinces by the Kriging method, and discussed the spatial distribution characteristics of seven heavy metals (Cr, Cd, Pb, Zn, Cu, As, and Hg) in arable land soil. Finally, we adopted the geo-accumulation index to evaluate the pollution status of arable land soil. The results showed that the spatial distribution of heavy metals Cr, Pb, Cu, Zn, and As in arable land soil of China was obvious, while the spatial distribution of soil Cd and Hg was very similar. Furthermore, the concentration of arable land soil in south China was obviously higher than that in the north. The mean value of the results showed that heavy metals are enriched to different degrees in arable land soil of China, and the average soil heavy metal concentrations of arable land are higher in Hunan, Yunnan, Guizhou, Sichuan, Fujian, Guangxi, and Shanghai. The results of geo-accumulation index pollution evaluations showed that the pollution degree of the seven heavy metals was in the order Cd>Hg>Pb>Cu>Zn>As>Cr, among which the soil heavy metals in arable land soil had a higher enrichment degree in Fujian, Guangdong, Hainan, Zhejiang, Hunan, Shaanxi, Gansu, Henan, Chongqing, Shanxi, Tianjin, Inner Mongolia, and Anhui. In general, the geo-accumulation indexes of Cd and Hg in each administrative region are higher, whereas the average land accumulation indexes also indicate that Cd and Hg in arable land shows greater pollution specially. Results from this study provide valuable scientific basis for formulating effective arable land pollution control strategies in the future.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Soil pollution Controlled terms:Agricultural robots - Agriculture - Ecosystems - Heavy metals - Land use - Pollution control - Soil surveys - Soils - Spatial distribution Uncontrolled terms:Agricultural productions - Agriculture ecosystems - Control strategies - Distribution characteristics - Geo-accumulation index - Heavy metal concentration - Pollution evaluation - Terrestrial ecosystems Classification code:403 Urban and Regional Planning and Development - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921 Mathematics DOI:10.13227/j.hjkx.201910075 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795564 Title:Temporal and Spatial Variation Patterns of Picophytoplankton and Their Correlations with Environmental Factors During the Wet Season in East Lake Dongting Title of translation:丰水期东洞庭湖超微型浮游藻类时空分布特征及其影响因子 Authors:Li, Sheng-Nan (1, 2); Chen, Hao-Yu (1, 3); Peng, Hua (1); Li, Chang-Jun (1); Zhu, Jian (1); Jian, Yan (1); Ji, Xiong-Hui (1, 3) Author affiliation:(1) Key Laboratory of Agro-Environment in Midstream of Yangtze Plain, Hunan Institute of Agro-Environment and Ecology, Hunan Academy of Agricultural Sciences, Changsha; 410125, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing; 210008, China; (3) Longping Branch of Graduate School of Hunan University, Changsha; 410125, China Corresponding author:Ji, Xiong-Hui(jixionghui@hunaas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2679-2687 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Picophytoplankton (<3 μm), comprising picocyanobacteria (PCY) and photosynthetic picoeukaryotes (PPEs), are considerably important in the material circulation and energy flow of aquatic ecosystems. To explore the temporal and spatial variation patterns of picophytoplankton and their correlations with environmental factors in lotic Yangtze-connected lakes, field in-situ investigations were performed on a monthly basis during the wet season (May to August) in 2019 in East Lake Dongting, a Yangtze-connected lake. The results indicated that both the Chla biomass and abundances of picophytoplankton exhibited significant spatial and temporal variability (P<0.05). The picophytoplankton Chla biomass showed an average concentration of 8.52 μg•L^-1 and accounted for 41.6% to total phytoplankton on an average. From May to August, Chla biomass of picophytoplankton kept increasing with increasing temperature, especially in the north and south of the lake, and it was the lowest in the east of the lake. PCY dominated picophytoplankton abundance in East Lake Dongting and was 3.4 times the abundance of PPEs on an average. Similar spatial and temporal variation patterns were observed between PCY and PPEs. The abundances of PCY and PPEs both increased first and then decreased during the wet season. Spatially, picophytoplankton showed a trend to migrate from the northern lake to the southern lake from May to July, and the abundance significantly declined in August and peaked mainly in the north of the lake. The analysis results showed that picophytoplankton in East Lake Dongting exhibited significant spatial and temporal variability during the wet season; the water level and N:P ratio were determined to be the most important factors explaining the variation of the abundance proportion of PCY and PPEs.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Lakes Controlled terms:Aquatic ecosystems - Biomass - Water levels Uncontrolled terms:Average concentration - Environmental factors - In-situ investigations - Increasing temperatures - Material circulation - Spatial and temporal variability - Spatial and temporal variation - Temporal and spatial variation Classification code:454.3 Ecology and Ecosystems Numerical data indexing:Mass_Density 8.52e-06kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201912223 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796116 Title:Effect of Calcium Peroxide Composite Tablets on Water Remediation and Phosphorus Control in Sediment Title of translation:过氧化钙复合片剂对水体修复和底泥磷控制的作用 Authors:Zhang, Shuai (1); Li, Da-Peng (1); Ding, Yu-Qin (1); Xu, Chu-Tian (1); Xu, Xin-Peng (1); Sun, Pei-Rong (1); Zhao, Zhe-Hao (1); Huang, Yong (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Li, Da-Peng(ustsldp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2706-2713 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Two types of calcium peroxide composite tablets (CPCTs) were prepared, and the inhibition effect on the release of endogenous phosphorus and the influence on the overlying water by mixed-dosing were investigated. The CPCTs were made of calcium peroxide (CaO2), calcined water purification sludge, and hydroxypropyl methylcellulose (HPMC), which were directly pressed into composite tablets, among which Tablet-B (T-B) contained ferrous sulfate (FeSO4) and Tablet-A (T-A) did not. Both the tablets agreed well with the Langmuir and Freundlich isothermal models; the theoretical maximum adsorption capacities of T-A and T-B on phosphorus were 110.908 mg•g^-1 and 106.390 mg•g^-1, respectively. Compared with the control group, the pH of overlying water was increased, the concentration of Chl-a was decreased by 42.75% and 60.82%, and the DO was increased by 53.73% and 63.30% in group A and B, respectively. The DIP of the overlying water decreased significantly by 54.93% and 25.11% in group A and B, respectively. For the interstitial water in sediment, the DIP in layer Ⅰ (0-2 cm) decreased significantly by 74.81% and 65.66% in group A and B, and the DIP in layer Ⅱ (2-4 cm) decreased significantly by 46.23% in group B, but not obviously in group A. The DIP in layer Ⅲ (4-6 cm) remained unchanged in group A and B. For phosphorus fractions in sediment, the proportion of NH4Cl-P in TP was significantly increased (layer Ⅰ: 16.87% and 13.11%; layer Ⅱ: 12.99% and 11.02%, in group A and B, respectively), and the proportion of Al-P in TP was significantly decreased (layer Ⅰ: 7.58% and 13.91%; layerⅡ: 9.86% and 7.28%, in group A and B, respectively). The other phosphorus fractions did not change significantly. Both T-A and T-B dosing can improve the microbial activity of the surface sediment, though T-A can improve the microbial activity more significantly.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Calcium compounds Controlled terms:Aluminum compounds - Chlorine compounds - Iron compounds - Oxidation - Peroxides - Phosphorus - Sediments - Sulfur compounds Uncontrolled terms:Adsorption capacities - Calcium peroxides - Hydroxypropyl methylcellulose - Inhibition effect - Interstitial water - Microbial activities - Phosphorus fractions - Water purification Classification code:483 Soil Mechanics and Foundations - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Percentage 1.10e+01%, Percentage 1.30e+01%, Percentage 1.69e+01%, Percentage 2.51e+01%, Percentage 4.28e+01%, Percentage 4.62e+01%, Percentage 5.37e+01%, Percentage 5.49e+01%, Percentage 6.08e+01%, Percentage 6.33e+01%, Percentage 6.57e+01%, Percentage 7.28e+00%, Percentage 7.48e+01%, Percentage 7.58e+00%, Percentage 9.86e+00%, Size 0.00e+00m to 2.00e-02m, Size 2.00e-02m to 4.00e-02m, Size 4.00e-02m to 6.00e-02m DOI:10.13227/j.hjkx.201911241 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658125 Title:Construction and Application of an Evaluation System for Soil Environmental Carrying Capacity Title of translation:土壤环境承载力评价体系构建与应用 Authors:Li, Xiao-Nuo (1); Ding, Shou-Kang (1, 2); Chen, Wei-Ping (1, 2); Wang, Xia-Hui (3); Lü, Si-Dan (4); Liu, Rui (5) Author affiliation:(1) Laboratory of Soil Environmental Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Resource and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Soil Environmental Protection, Chinese Academy of Environmental Planning, Ministry of Ecology and Environment, Beijing; 100012, China; (4) Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (5) Academy of Science and Technology Innovation Strategy, Henan Academy of Sciences, Zhengzhou; 450002, China Corresponding author:Chen, Wei-Ping(wpchen@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2373-2380 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the effect of soil environmental carrying capacity on pollutants and human activities, as well as to effectively prevent the aggravation of soil pollution and control soil environmental risks, a comprehensive indicator system for soil environmental carrying capacity is developed by analyzing the input-output flux and risk characteristics of soil pollutants. Furthermore, an evaluation method for soil environmental carrying capacity is proposed by defining safety coefficients related to evaluation indicators. Based on evaluation of soil environmental quality, the system reflects soil properties, pollution evolution trends, and risk characteristics, focusing on the soil buffering function. Further, a quantitative evaluation is carried out to assess the regional soil environmental carrying capacity of heavy metals on development land in Beijing. The results show that the soil environmental carrying capacity of Cu, Zn, Pb, and Cd in Beijing varies widely. The soil environmental carrying capacity of Cd is much lower than that of other elements. Four policy recommendations are proposed as significant for effective soil pollution prevention and control: clarifying concepts for soil environmental carrying capacity, improving the evaluation framework, constructing an information database, and implementing demonstration pilots.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Soil pollution Controlled terms:Heavy metals - Quality control - Soil pollution control - Soils Uncontrolled terms:Environmental carrying capacities - Environmental quality - Evaluation framework - Evaluation indicators - Policy recommendations - Pollution prevention and controls - Quantitative evaluation - Risk characteristics Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.201911159 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658166 Title:Response of Chromophoric Dissolved Organic Matter Dynamics to Different Hydrological Scenarios in the Two Largest Freshwater Lakes Connected to the Yangtze River Title of translation:大型通江湖泊有色可溶性有机物对不同水文情景的响应 Authors:Guo, Yan-Ni (1, 2); Li, Yuan-Peng (2); Shi, Yu (2); Zhang, Liu-Qing (2); Zhou, Lei (2, 3); Zhou, Yong-Qiang (2, 3); Zhang, Yun-Lin (2, 3); Han, Long-Fei (1) Author affiliation:(1) School of Resources and Environmental 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) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Han, Long-Fei(hanlf@hunnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2198-2209 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Poyang Lake and Dongting Lake are the two largest freshwater lakes in China connected to the Yangtze River. Changes in the water quality of the two lakes are critical to the water security of the residents surrounding the lakes. Analyses of the optical properties, including chromophoric dissolved organic matter (CDOM) absorption and fluorescence spectroscopy coupled by parallel factor analysis (PARAFAC), were carried out to investigate the dynamics of CDOM in the two lakes in different hydrological scenarios. Our results indicated that different hydrological scenarios have more notable effects on the CDOM dynamics in Poyang Lake compared to those in Dongting Lake. In Poyang Lake, the mean CDOM absorption a(254) and dissolved organic carbon (DOC) were higher in the wet season than in the dry-to-wet transition season, and higher still than in the dry season (t-test, P<0.01), and the mean of the CDOM absorption spectral slope S275-295 was higher in the dry season than in the dry-to-wet transition season and higher still than in the wet season (t-test, P<0.01). In Dongting Lake, the mean of a(254) was not significantly different between different hydrological periods, and SUVA254 reached its maximum in the dry-to-wet transition season. Four fluorescent components were identified using parallel factor analysis. The contribution percentage of CDOM protein-like components in the two lakes was higher during the dry season, and the protein-like components and humic-like components contributed roughly the same amount in the dry-to-wet season, whereas the humic-like components accounted for the main proportion in both lakes during the wet season. From the perspective of spatial distribution, the fluorescence intensity of the four components of Poyang Lake was lower in the southern upstream than in the northern downstream lake regions during the dry season, whereas in the wet season a contrast pattern was found, i.e., with high values found in the upstream lake regions. The spatial difference of fluorescence intensity of the four components in the east of Dongting Lake during the dry season was greater than that in the wet season. We found that DOC increased with increasing water level (r²=0.99, P<0.01) in Poyang Lake and tryptophan-like C2 decreased with increasing water level (r²=0.99, P<0.05) in Dongting Lake. Therefore, the water quality of the two lakes should be managed in a targeted manner according to the response characteristics of CDOM in the two lakes under different hydrological scenarios.
© 2020, Science Press. All right reserved. Number of references:53 Main heading:Lakes Controlled terms:Amino acids - Biogeochemistry - Dissolution - Drought - Dynamics - Factor analysis - Fluorescence - Fluorescence spectroscopy - Multivariant analysis - Optical properties - Organic carbon - Proteins - Rivers - Water levels - Water quality Uncontrolled terms:Absorption and fluorescence spectroscopy - Chromophoric dissolved organic matter - Dissolved organic carbon - Fluorescence intensities - Hydrological scenarios - Parallel factor analysis - Response characteristic - Spatial differences Classification code:444 Water Resources - 445.2 Water Analysis - 481.2 Geochemistry - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations - 804.1 Organic Compounds - 922 Statistical Methods - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.201911014 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070240 Title:Enhanced Phytoextraction of Cadmium Contaminated Soil by Trifolium Repens with Biodegradable Chelate GLDA Title of translation:可生物降解螯合剂GLDA强化三叶草修复镉污染土壤 Authors:He, Yu-Long (1, 2); Yu, Jiang (1, 2); Xie, Shi-Qian (1, 2); Li, Pei-Rou (1, 2); Zhou, Kuan (1, 2); He, Huan (1, 2) 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 Corresponding author:Yu, Jiang(yuj@scu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:979-985 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Chelating agents can increase the bioavailability of heavy metals and enhance their enrichment in plants. The effects of different concentrations of biodegradable chelating agent L-glutamic acid N, N-diacetic acid (GLDA) on the remediation of heavy metal-contaminated soil by super-enriched plant Trifolium repens were investigated by pot experiments with Cd-contaminated soil. Results show that low-dose GLDA could significantly promote the growth of Trifolium repens, and the biomass of Trifolium repens was the highest at 2.5 mmol•kg^-1-GLDA, which was 1. 30 times that of the control group. Different concentrations of GLDA can increase Cd content of various parts of Trifolium repens. In general, the treatment effect of 5 mmol•kg^-1 GLDA was ideal. In this scenario, the root, aerial parts, and whole Cd content were 3.57, 4.69, and 4.67 times of the control group, respectively. GLDA can significantly increase the available Cd content in soil, promote direct absorption at the Trifolium repens roots, and provide better transport to the aerial parts. The prediction model obtained by fitting the linear relationship between physical and chemical properties of soil indicates that GLDA and Trifolium repens Cd content can provide references for the future research of soil-Trifolium repens enrichment. Studies have shown that the biodegradable chelating agent GLDA has potential applications for enhancing phytoremediation of heavy metal Cd contaminated soil.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Soil pollution Controlled terms:Amino acids - Antennas - Biochemistry - Bioremediation - Cadmium - Chelation - Contamination - Heavy metals - Predictive analytics - Soil pollution control - Soils Uncontrolled terms:Biodegradable chelating agents - Cd-contaminated soils - Chelating agent - Heavy metal contaminated soils - L-glutamic acids - Physical and chemical properties - Phytoremediation - Trifolium repens Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds Numerical data indexing:Molality 5.00e-03mol/kg to 2.20e+01mol/kg DOI:10.13227/j.hjkx.201907117 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070245 Title:Phosphorus Storage Capacity and Loss Risk in Coastal Reed Wetland Surrounding Bohai Sea Title of translation:环渤海芦苇湿地磷的吸附容量及释放风险评估 Authors:Song, Jia-Wei (1, 2); Xu, Gang (1, 3); Zhang, Yang (1, 2); Lü, Ying-Chun (1) Author affiliation:(1) Yantai Coastal Zone Research Institute, Chinese Academy of Sciences, Yantai; 264003, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Geography and Tourism, Qufu Normal University, Rizhao; 276826, China Corresponding author:Xu, Gang(gxu@yic.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:728-733 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Coastal wetland, at the intersection of land and sea, is considered as a "sink", "source", and "transformer" of phosphorus (P). Coastal wetland plays an important role in the global P cycle, and its ability to retain excessive P in water receives increasing attention. In this study, the coastal reed wetland sediments surrounding the Bohai Sea were sampled to investigate P adsorption capacity and loss risk by conducting batch experiments. Results show that the maximum P adsorption capacity (Qmax) was 693.7-2 117.2 mg•kg^-1, with an average of 1 468.6 mg•kg^-1. The Qmax decreased in the order of Qilihai Wetland>Beidagang Wetland>Nandagang Wetland>Liaohe Delta Wetland>Shouguang Coastal Wetland>Yellow River Delta Wetland. The P adsorption capacity was related to the contents of Ca, Mg, and TOC. The degree of P adsorption saturation (DPS) and loss risk index (ERI) of the coastal wetland were 0.28%-4.50% and 0.53%-10.10%, respectively. The ERI suggested that the P loss risk was relatively low for coastal reed wetland surrounding the Bohai Sea except for the moderate loss risk for Shouguang coastal wetland. In summary, the reed coastal wetland around Bohai Sea demonstrated significantly P storage capacity and served as a P sink for water P. We recommend to fully utilize the coastal wetland to reduce point or non-point source pollution (e. g., P) during the remediation or recovery of the polluted Bohai Sea.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Wetlands Controlled terms:Adsorption - Phosphorus - River pollution Uncontrolled terms:Adsorption capacities - Batch experiments - Coastal wetlands - Non-point source pollution - Phosphorus storage - Risk indices - Surface sediments - Yellow River delta Classification code:453 Water Pollution - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 2.80e-01% to 4.50e+00%, Percentage 5.30e-01% to 1.01e+01% DOI:10.13227/j.hjkx.201908013 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371244 Title:Realization Process of Nitritation and Changes in Sludge Characteristics in Granular Sludge Reactor for Low Strength Sewage Treatment Title of translation:低基质颗粒污泥反应器中亚硝化的实现过程及其污泥变化特征 Authors:Zhu, Lin (1); Cheng, Cheng (1); Song, Jia-Jun (1); Guo, Kai-Cheng (1); Wang, Qian (1); Liu, Wen-Ru (1, 2, 3, 4); Shen, Yao-Liang (1, 2, 3, 4) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (3) Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China; (4) Institute of Water Pollution Control and Resource Recovery, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Shen, Yao-Liang(ylshen@mail.usts.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1801-1807 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The realization process of nitritation was studied in a CSTR reactor seeding with nitrification granular sludge to treat low ammonia sewage. During the operation period, the physical and chemical properties, the spatial distribution of functional microbes, and the activity of the granular sludge were also investigated to elaborate the main factors for the stability of nitritation. The results showed that nitritation can be successfully achieved and maintained by the cooperative controlling of nitrogen loading rate (NLR) and dissolved oxygen (DO) levels, and the nitrite accumulation rate was over 80%. The obtained nitritation granular sludge was brownish yellow, showing a smooth, full ellipsoid or sphere, and the microorganisms on the surface of the particles were mainly cocci; the average particle size was 1.3 mm, and the average sedimentation rate was 71.3 m•h^-1. Batch tests showed that there was a significant stratified distribution structure in granular sludge (particle size >0.8 mm), the ammonia-oxidizing bacteria (AOB) mainly occupied the surface space of the particles, and the nitrite-oxidizing bacteria (NOB) were mainly distributed inside the particles. Flocs or small-size sludge (particle size<0.8 mm) and granular sludge (particle size >0.8 mm) exhibit different spatial distribution characteristics of microorganisms. In the granular sludge reactor, well stratification of the nitrifier guilds, high level of residual ammonia concentrations in effluent (15-33 mg•L^-1), or low ratio between DO and NH4⁺-N concentrations (0.08-0.15) should be key influencing factors in the process of achieving nitritation.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Bacteria Controlled terms:Ammonia - Chemical stability - Dissolved oxygen - Granular materials - Nitration - Nitrification - Particle size - Sewage treatment - Spatial distribution Uncontrolled terms:Ammonia concentrations - Continuous flows - Granular sludge - Nitritation - Sludge characteristics Classification code:452.2 Sewage Treatment - 801 Chemistry - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 921 Mathematics - 951 Materials Science Numerical data indexing:Mass_Density 1.50e-02kg/m3 to 3.30e-02kg/m3, Percentage 8.00e+01%, Size 1.30e-03m DOI:10.13227/j.hjkx.201910164 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278121 Title:HONO Observation and Assessment of the Effects of Atmospheric Oxidation Capacity in Changzhou During the Springtime of 2017 Title of translation:2017年春季常州 HONO观测及对大气氧化能力影响的评估 Authors:Shi, Xiao-Wen (1, 2); Ge, Yi-Feng (1, 2); Zhang, Yu-Chan (1, 2); Ma, Yan (1, 2); Zheng, Jun (1, 2) Author affiliation:(1) School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Zheng, Jun(junzheng70@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1123-1131 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:HONO measurement was conducted using a wet-chemistry-based method at the Changzhou Environmental Monitoring Center in April 2017. HONO ranged from 0.2-13.9 μg•m^-3 with an average of (2.9±2.3) μg•m^-3. O3, HCHO, volatile organic compounds, photolysis frequency, and meteorological parameters were simultaneously monitored. •OH concentration was simulated by a Master Chemical Mechanism box model and the daytime maximum •OH concentration ranged from 1.0×10⁶ to 14×10⁶ molecules per cubic centimeter. The formation rates of •OH by photolysis of HONO, O3, HCHO, H2O2, and alkene ozonolysis were calculated as well. The effects of the five sources on atmospheric oxidation capacity were revealed: O3 photolysis (46.4%)>HONO photolysis (41.1%)>alkene ozonolysis (10.9%)>HCHO photolysis (1.5%)>H2O2 photolysis (0.1%). HONO photolysis for OH radical production played a major role in the early morning, before with an increase in O3 concentration, O3 photolysis began to account for most of the •OH production. After 17:00, due to a significant decrease in the intensity of solar radiation, the alkene ozonolysis started playing a major role in the formation of •OH. The photolysis of formaldehyde and hydrogen peroxide played a negligible role in •OH radical production in this study.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Atmospheric chemistry Controlled terms:Free radicals - Monitoring - Olefins - Oxidation - Ozone - Photolysis - Volatile organic compounds Uncontrolled terms:Atmospheric oxidation capacity - Environmental Monitoring - Heterogeneous chemistry - HONO - Master chemical mechanism - Meteorological parameters - OH radical - Photolysis frequencies Classification code:443.1 Atmospheric Properties - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.00e-01%, Percentage 1.09e+01%, Percentage 1.50e+00%, Percentage 4.11e+01%, Percentage 4.64e+01% DOI:10.13227/j.hjkx.201909032 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106399 Title:Seasonal Characteristics and Source Analysis of Water-soluble Inorganic Ions in PM2.5 in Suqian City Title of translation:宿迁市PM2.5中水溶性无机离子的季节特征和来源分析 Authors:Ma, Hong-Lu (1); Zhao, Xin (2, 3); Lu, Jian-Gang (1); Wang, Hui (4); Xu, Chun-Ling (4); Ouyang, Yan (2); Zhu, Xin-Sheng (2); Yin, Tang-Bing (2, 3); Qi, Dan (2, 3); Lu, Ya-Qiu (2); Wang, Jiu-Yang (1); Lu, Sheng-Xing (1) Author affiliation:(1) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing; 210044, China; (2) Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing; 210042, China; (3) State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing; 210042, China; (4) Suqian Center of Environmental Monitoring, Suqian; 223800, China Corresponding author:Zhao, Xin(zhaoxin_8125@163.comemailjglu@nuist.edu.cn)Lu, Jian-Gang(jglu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3899-3907 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the seasonal pollution characteristics and sources of water-soluble inorganic ions in atmospheric PM2.5 in Suqian City, 171 samples were collected at three monitoring points, which were in the water vapor channel, from May 2017 to January 2018. The mass concentrations of PM2.5 and nine water-soluble inorganic ions were analyzed. The results showed that the annual average concentration of water-soluble inorganic ions in PM2.5in Suqian City was (44.08±34.61) μg•m^-3, accounting for 41.8% of PM2.5. The concentrations of these species were in the order of ρ(NO3^-)>ρ(SO4^2-)>ρ(NH4⁺)>ρ(ρl^-)>ρ(Na⁺)>ρ(Ca²⁺)>ρ(K⁺)>ρ(F^-)>ρ(Mg²⁺); NO3^-, SO4^2-, and NH4⁺ accounted for 75.6% of the total water-soluble ions. The annual average ratio of ρ(NO3^-) to ρ(SO4^2-) was 1.53±0.88, indicating that mobile sources contributed more to PM2.5 pollution. Based on the correlation analysis of NH4⁺ and SO4^2-, NO3^- may exist in the form of (NH4)2SO4, NH4HSO4, or NH4NO3. According to the principal component analysis, secondary transformation, industrial pollution, biomass burning, and dust were the major sources of water-soluble inorganic ions. PM2.5concentrations were positively related to relative humidity in winter. Water vapor transmission is more likely to promote PM2.5 accumulation in winter.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Water pollution Controlled terms:Atmospheric humidity - Ions - Nitrogen compounds - Water vapor Uncontrolled terms:Annual average concentration - Correlation analysis - Industrial pollution - Seasonal characteristics - Secondary transformation - Water soluble inorganic ions - Water vapor channels - Water vapor transmission Classification code:443.1 Atmospheric Properties - 453 Water Pollution Numerical data indexing:Percentage 4.18e+01%, Percentage 7.56e+01% DOI:10.13227/j.hjkx.201911243 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953334 Title:Effects of Ferrous Sulfate and Ferric Nitrate on Cadmium Transportation in the Rhizosphere Soil-Rice System Title of translation:硫酸亚铁和硝酸铁施用对根际土壤-水稻系统中镉运移的影响 Authors:Li, Yi-Chun (1, 2, 3); Chen, Yong (1, 2, 3); Tang, Ming-Deng (1, 2, 3); Li, Lin-Feng (1, 2, 3); Lin, Xiao-Yang (1); Wang, Yan-Hong (1, 2, 3); Xu, Di-Hao (1, 2, 3); Ai, Shao-Ying (1, 2, 3) Author affiliation:(1) Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou; 510640, China; (2) Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Guangzhou; 510640, China; (3) Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou; 510640, China Corresponding author:Ai, Shao-Ying(aishaoying@gdaas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5143-5150 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cadmium (Cd) contamination in the agricultural soils of China is a serious and growing environmental problem that urgently needs to be controlled and completely remediated. The biogeochemical cycles of nitrogen (N), sulfur (S), and iron (Fe), and the coupled cycles of Fe-N and Fe-S have been reported to control Cd transportation in the soil-rice system. Exploring practical remediation strategies for Cd from the perspective of the application of nutrients such as N, S, and Fe for rice growth is expected to obtain farm-specific and state-of-the-art technologies and products to reduce the accumulation of Cd in rice grains. Using our earlier study as a basis, the rhizosphere bag-pot experiment with ferrous sulfate (FeSO4) and ferric nitrate [Fe(NO3)3] treatments was conducted to investigate Cd bioavailability in rhizosphere soil and Cd translocation in rice plants, and to highlight some possible factors and mechanisms controlling Cd accumulation in rice grains. The results showed that both FeSO4and Fe(NO3)3 treatments reduced the bioavailable Cd (NH4Ac-Cd) content in rhizosphere soil, with the decreasing extent being significantly lower in the former (55.6%) than in the latter (76.0%). Both FeSO4 and Fe(NO3)3 treatments changed the distribution characteristics of Cd in rice tissues, and the FeSO4 treatment increased the Cd content in brown rice (0.6 mg•kg^-1), but the Fe(NO3)3 treatment decreased the Cd content in brown rice (0.1 mg•kg^-1). Adsorption or co-precipitation of Cd by iron plaque, increased accumulations of Cd in root, stem, and leaf, and enhanced translocations of Cd from root, stem, and nodule to brown rice occurred with the increased Cd content in brown rice of the FeSO4 treatment. However, the decreased Cd content in brown rice with the Fe(NO3)3 treatment was ascribed to adsorption or co-precipitation of Cd by poorly crystalline Fe oxides and solid Fe sulfides, decreased accumulations of Cd in stem and nodule, and weakened translocations of Cd from root, leaf, and nodule to brown rice. These findings provide a scientific basis for the exploration and application of nutritive soil amendment, and will have significance in regards to the remediation of Cd-contaminated agricultural soils in China.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Soil pollution Controlled terms:Agricultural robots - Biogeochemistry - Coprecipitation - Grain (agricultural product) - Iron oxides - Nitrates - Soils - Sulfur compounds Uncontrolled terms:Agricultural soils - Biogeochemical cycle - Distribution characteristics - Environmental problems - Remediation strategies - Rhizosphere soils - Scientific basis - State-of-the-art technology Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 5.56e+01%, Percentage 7.60e+01% DOI:10.13227/j.hjkx.202004166 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371350 Title:Efficiency of Magnesium Hydroxide Capping and Amendment to Control Phosphorus Release from Sediments Title of translation:氢氧化镁对水体内源磷释放的控制作用 Authors:Yang, Chun-Yi (1); Zhan, Yan-Hui (1); Lin, Jian-Wei (1); Qiu, Bo (1); Xu, Wen-Long (1); Yu, Yang (1); Huang, Liang-Jun (2) Author affiliation:(1) College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai; 201306, China; (2) Eight-Sail Instrument & Equipment (Shanghai) Co., Ltd., Shanghai; 201114, China Corresponding author:Zhan, Yan-Hui(yhzhan@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1700-1708 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Eutrophication of freshwater bodies has become a global environmental problem, and phosphorus (P) has been identified as one of the key limiting factors responsible for this eutrophication problem. Reducing internal P release is crucial to the control of the eutrophication of freshwater bodies besides reducing the input of external P. To control sedimentary P release, magnesium hydroxide [Mg(OH)2] was applied as a capping and amendment material in this study. The adsorption performance of phosphate on Mg(OH)2 was investigated in batch mode, and the effect of Mg(OH)2 capping and amendment on the mobilization of P in sediments was studied using sediment incubation experiments. Results showed that Mg(OH)2 exhibited good adsorption performance toward phosphate. The phosphate removal efficiency of Mg(OH)2 increased with increasing adsorbent dosage. The adsorption equilibrium data of phosphate on Mg(OH)2 could be better described by the Freundlich and Dubinin-Radushkevich isotherm models compared to the Langmuir isotherm model. Mg(OH)2 capping and addition both could effectively control the release of reactive soluble P (SRP) from sediments into the overlying water, resulting in a low concentration of SRP in the overlying water under Mg(OH)2 capping and amendment conditions. Mg(OH)2 capping and amendment both could reduce pore water SRP in the uppermost sediment (0-10 mm), which played a key role in the control of the release of SRP from sediments into the overlying water. The as-prepared Mg(OH)2 possessed a much higher phosphate adsorption ability than commercial Mg(OH)2, and the former also had a higher controlling efficiency of sedimentary P release than the latter. In summary, Mg(OH)2 is a promising capping and amendment material for the control of internal phosphorus release in freshwater bodies.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Magnesium compounds Controlled terms:Adsorption - Adsorption isotherms - Efficiency - Eutrophication - Sedimentology - Sediments - Water Uncontrolled terms:Addition - Adsorption performance - Capping - Controlling efficiency - Global environmental problems - Langmuir isotherm models - Magnesium hydroxide - Phosphorus loading Classification code:481.1 Geology - 483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 913.1 Production Engineering Numerical data indexing:Size 0.00e+00m to 1.00e-02m DOI:10.13227/j.hjkx.201909004 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371235 Title:3D Porous Photothermal Materials for High Salt Wastewater Treatment Title of translation:新型三维多孔光热材料制备及其高盐废水处理应用 Authors:Huang, Le (1, 2); Xu, Ying-Feng (1, 2); Xie, Qian-Qing (1); Zhao, Xian (1); Feng, Hua-Jun (1, 2) Author affiliation:(1) School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou; 310012, China; (2) Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou; 310012, China Corresponding author:Feng, Hua-Jun(fenghuajun@mail.zjgsu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1716-1724 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The treatment of high salinity wastewater is complex with high cost and energy consumption. Interfacial solar vapor generation technology because of its green, high efficiency and low energy consumption has become a hot spot in the field of water resource recovery and utilization. In this study, a novel three-dimensional porous graphene composite material (3D h-CN/r-GO) was designed by a hydrothermal reaction with fibrous carbon nitrogen (h-CN) modified graphene (r-GO), and its performance for adsorption of nitrobenzene and phenol as simulated contaminants via photothermal evaporation was studied. The results showed that 3D h-CN/r-GO has a broad-spectrum absorption and multistage channel structure and presents the characteristics of fast thermal response. Its light steam conversion efficiency can reach 90.4% under the condition of simulated sunlight. The adsorption of nitrobenzene, phenol, and other common volatile pollutants can be realized in the process of treatment, and its adsorption capacities of nitrobenzene and phenol were 67.6 mg•g^-1 and 57.5 mg•g^-1, respectively. Moreover, 3D h-CN/r-GO can realize efficient interfacial solar vapor generation with long-time stability, and its retention rate of pollutants and salts is up to 98%. The recovery and utilization of steam condensate meets the discharge standard. Therefore, this study provides a promising way for the treatment of high salinity wastewater with low energy consumption and cost.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Wastewater treatment Controlled terms:Absorption spectroscopy - Adsorption - Composite materials - Energy utilization - Graphene - Nitrobenzene - Phenols - Pollution - Steam condensate - Steam condensers - Water resources Uncontrolled terms:Adsorption capacities - High salinity wastewaters - High-salt wastewater - Hydrothermal reaction - Long time stabilities - Low energy consumption - Recovery and utilizations - Vapor generation Classification code:444 Water Resources - 452.4 Industrial Wastes Treatment and Disposal - 525.3 Energy Utilization - 616.1 Heat Exchange Equipment and Components - 761 Nanotechnology - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 9.04e+01%, Percentage 9.80e+01% DOI:10.13227/j.hjkx.201908096 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371257 Title:Reduction of Soil Cadmium Activity and Rice Cadmium Content by 4-year-consecutive Application of Organic Fertilizer Title of translation:连续4 a施有机肥降低紫泥田镉活性与稻米镉含量 Authors:Xue, Yi (1); Yin, Ze-Run (1); Sheng, Hao (1); Ma, Hao-Liu (1); Zhou, Qing (1); Song, Da-Qing (2); Zhang, Yang-Zhu (1) Author affiliation:(1) College of Resources and Environment, Hunan Agricultural University, Changsha; 410128, China; (2) Soil and Fertilizer Station of Zhuzhou County, Lukou; 412000, China Corresponding author:Sheng, Hao(shenghao82@hunau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1880-1887 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Because commercial organic fertilizers may contain cadmium (Cd) and may cause the dual effect of "inhibition" and "activation" on Cd availability in paddy soil with organic fertilizer input, the reduction of rice Cd following organic fertilizer application is still uncertain. Herewith, typical purple mud paddy fields were selected in the eastern Hunan Province. The effect of commercial organic fertilizer input on Cd reduction of double-rice paddy ecosystem was monitored for four consecutive years. The relationships between brown rice Cd content, soil available Cd, and soil factors (pH, soil labile organic carbon fractions, and iron oxide) at different growth stages in double-rice paddy fields were investigated. Results showed that the input of organic fertilizer reduced the Cd content in brown rice by 28%-56%. Meanwhile, the decrease of Cd content in brown rice of late rice (43%-56%) was higher than that of early rice (28%-45%), and the inter-annual fluctuation of the decrease was relatively small. On the one hand, soil available Cd content decreased by 6%-7% during several growth stages of double-rice (from tillering peak stage to full heading stage) with organic fertilizer input. Additionally, the content of soil exchangeable Cd was decreased by 11%, whereas the content of organic bound Cd was increased by 14%. This directly reflects the decrease of soil Cd availability. On the other hand, the soil pH value was steadily increased by 0.1-0.3 units following organic fertilizer input, which promoted the development of soil from acidity to slight acidity. Besides, the content of soil active organic carbon (light fraction organic carbon, coarse particulate organic carbon, and fine particulate organic carbon) was increased significantly (53%, 77%, and 107%, respectively). This indirectly reflects the decrease in soil Cd availability. This study implies that the decrease of soil Cd availability may be the primary driving force for the reduction of rice Cd content with consecutive organic fertilizer input in purple mud paddy fields.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Organic carbon Controlled terms:Cadmium - Fertilizers - Iron oxides - pH - Soil pollution - Soils Uncontrolled terms:Cultivated soils - Different growth stages - Fertilization experiment - Light fraction organic carbons - Organic carbon fraction - Paddy soils - Rice paddy ecosystems - Soil heavy metals Classification code: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 Numerical data indexing:Percentage 1.07e+02%, Percentage 1.10e+01%, Percentage 1.40e+01%, Percentage 2.80e+01% to 4.50e+01%, Percentage 2.80e+01% to 5.60e+01%, Percentage 4.30e+01% to 5.60e+01%, Percentage 5.30e+01%, Percentage 6.00e+00% to 7.00e+00%, Percentage 7.70e+01% DOI:10.13227/j.hjkx.201910025 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861941 Title:Water Quality and Bacterial Population Driving Mechanism of Algae Vertical Succession in Stratified Reservoir Title of translation:分层型水库藻类垂向演替的水质与细菌种群调控 Authors:Yan, Miao-Miao (1); Chen, Sheng-Nan (1); Huang, Ting-Lin (1); Jia, Jing-Yu (1); Liu, Kai-Wen (1); Miao, Yu-Tian (1); Zong, Rong-Rong (1) Author affiliation:(1) Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Chen, Sheng-Nan(chenshengnan@xauat.edu.cnemailhuangtinglin@xauat.edu.cn)Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3285-3296 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Phytoplankton and bacteria are important components of the aquatic food web, and play a critical role in substance circulation and energy exchange in freshwater ecosystems. The succession of algae is closely related to the metabolism and structural succession of bacterial populations in the water column. Thus, in this study, the vertical succession characteristics of phytoplankton and bacteria community structure and their coupling with water quality were investigated during an algal bloom in the Lijiahe Reservoir using high-throughput DNA sequencing and Biolog technologies. The results showed that the Lijiahe Reservoir was in the thermal stratification stage in August, and the pH, dissolved oxygen, and NH4⁺-N of the water column gradually decreased with depth (P<0.001). Algal cell concentration and chlorophyll a exhibited a simultaneous trend (P<0.001), and the maximum values in the surface layer were 3 363.33×10⁴ cells•L^-1 and 7.03 μg•L^-1, respectively. The algal community structure was dominated by Microcystis at water depths of 0 m and 3 m, and at 6 m water depth, Cyclotella replaced Microcystis as the most dominant algae, with a relative abundance of 57.28%. Biolog analysis indicated that the outbreak of Microcystis had a significant impact on bacterial metabolic activity and its relative abundance, but the diversity of bacterial population metabolic activity varied less. A total of 1 420 operational taxonomic units were found by high-throughput sequencing, belonging to 10 bacterial phyla. Of these, Actinobacteria and Proteobacteria dominated in all water layers, and their relative abundances were more than 50%. The relative abundance of Chlorobi and Planctomycetes varied significantly with water depth, reaching their maxima at a depth of 6 m with values of 10.29% and 6.78%, respectively, which were both negatively correlated with algal density (P<0.05). Firmicutes and Gemmatimonadetes were positively correlated with algal density (P<0.05). A heat map fingerprint showed that the vertical distribution of the bacterial community structure of the Lijiahe Reservoir varied significantly, and with the increase in water depth, the bacterial community was more uniformly distributed and tended to diversify. Redundancy analysis (RDA) showed that the vertical distribution of the bacterial and algal community structure was regulated by different water qualities, and the difference was significant. This study investigated the coupling mechanism of algal and bacterial communities during the algal bloom in the Lijiahe Reservoir, and the results provided a scientific basis for the investigation of the molecular microecological driving mechanism of water-source algal blooms.
© 2020, Science Press. All right reserved. Number of references:59 Main heading:Reservoirs (water) Controlled terms:Aquatic ecosystems - Bacteria - Biochemical oxygen demand - Dissolved oxygen - DNA sequences - Gene encoding - Metabolism - Phytoplankton - Quality control - Water quality Uncontrolled terms:Bacteria community structures - Bacterial community structure - Bacterial population - High-throughput sequencing - Operational taxonomic units - Redundancy analysis (RDA) - Stratified reservoirs - Vertical distributions Classification code:441.2 Reservoirs - 445.2 Water Analysis - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 913.3 Quality Assurance and Control Numerical data indexing:Mass_Density 7.03e-06kg/m3 to 2.20e-02kg/m3, Percentage 1.03e+01%, Percentage 5.00e+01%, Percentage 5.73e+01%, Percentage 6.78e+00%, Size 0.00e+00m, Size 3.00e+00m, Size 6.00e+00m DOI:10.13227/j.hjkx.202001131 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658175 Title:Pollution Characteristics and Removal Effects of Antibiotics in Wastewater from Large-Scale Pig Farms in Guizhou Title of translation:贵州某规模化养猪场废水中抗生素的污染特征及去除效果 Authors:Yang, Zhao (1); Li, Jiang (1); Xiang, Fu-Liang (1); Li, Yan-Chen (1); Ma, Kai (2); Xie, Feng (2) Author affiliation:(1) College of Resources and Environmental Engineering, Guizhou University, Guiyang; 550025, China; (2) Guizhou Academy of Testing and Analysis, Guiyang; 550000, China Corresponding author:Li, Jiang(jli82@gzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2320-2328 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the pollution characteristics and removal effect of antibiotics in the wastewater treatment process of large-scale pig farms in Guizhou, solid-phase extraction-liquid chromatography-tandem mass spectrometry (SPE-LC-MS) was used to investigate the removal of ten veterinary antibiotics from the influent and effluent of each treatment unit during the wastewater treatment process in two large-scale pig farms (named Farm A and Farm B). The results showed that the removal rates of conventional pollutants [including chemical oxygen demand (COD), NH4⁺-N, total nitrogen (TN), and total phosphorus (TP)] in Farm A and Farm B were above 88.10%. The antibiotics concentrations detected in the influent and effluent ranged from ND-120 842.74 ng•L^-1. The main antibiotics were sulfamonomethoxine (SMM), sulfamethoxazole (SMD), oxytetracycline (OTC), and ofloxacin (OFL), and the SMM concentration was highest at 120 842.74 ng•L^-1. The removal rate of the ten antibiotics was 99.23%-100.00% in Farm A and Farm B. In the wastewater treatment process of Farm A, the treatment section "USR+2A/O+disinfection pond+oxidation pond" removed antibiotics in wastewater effectively, with the total removal rate of SMM, SMD, and OTC reaching 100.00%. In the wastewater treatment process of Farm B, the treatment section "ultrafiltration (UF)+nanofiltration (NF)" removed antibiotics effectively by more than 99.23%. However, the concentrations of antibiotics investigated in the effluent were higher than the EU water environment antibiotic threshold (10 ng•L^-1). Finally, through redundancy analysis, it was found that conventional indicators (COD, NH4⁺-N, TN, TP, and pH) in wastewater were related to the degradation of some antibiotics.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Wastewater treatment Controlled terms:Antibiotics - Chemical oxygen demand - Effluent treatment - Effluents - Lakes - Liquid chromatography - Mammals - Mass spectrometry - Nitrogen removal - Phase separation - Pollution - Reclamation - Water filtration - Water treatment Uncontrolled terms:Oxytetracyclines (OTC) - Redundancy analysis - Solid-phase extraction - Sulfamonomethoxine - Total removal rates - Veterinary antibiotic - Wastewater treatment process - Water environments Classification code:445.1 Water Treatment Techniques - 452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 461.6 Medicine and Pharmacology - 641.1 Thermodynamics - 801 Chemistry Numerical data indexing:Mass_Density 1.00e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 8.43e-07kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Percentage 8.81e+01%, Percentage 9.92e+01% to 1.00e+02%, Percentage 9.92e+01% DOI:10.13227/j.hjkx.201910050 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658190 Title:Effects of Different Forest Vegetation Types on Soil Nitrogen-Related Microbial Communities and Functions in Jinyun Mountain Title of translation:缙云山森林植被类型对土壤产N2O相关功能微生物的影响 Authors:Wang, Ying-Yan (1); Wang, Fu-Hua (1); Luo, Dong-Hai (1); Lü, Sheng (1); Wang, Zi-Fang (1); Gao, Ming (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China Corresponding author:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2445-2454 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To clarify the response of a nitrogen-related microbial community and function to different vegetation types in subtropical forest, soil samples were collected for analysis from the topsoil of five vegetation types in the Jinyun Mountain National Nature Reserve, i.e., coniferous forest, broadleaf forest, mixed broadleaf-coniferous forest, P. pubescen forest, and grassland. To analyze the microbial abundance, community, and function discrepancy between different vegetation soils, multiple molecular techniques, such as terminal restriction fragment length polymorphism (T-RFLP) and quantitative polymerase chain reaction (qPCR) analysis, and nitrogen-related microbial enzyme activity procedures were used. The results showed: ① The denitrifying enzyme activity was much higher than nitrifying potential in Jinyun Mountain National Nature Reserve, and the two enzyme activities were much lower in coniferous forest soil than in the other vegetation soils (P<0.05). In addition, dissolved organic carbon, soil water content, and total nitrogen were the key environmental factors controlling enzyme activity. ② The qPCR data showed that the abundance of nitrogen-related microbes was highest in P. pubescen forest, whereas it was lowest in coniferous forest. The abundances of the three nitrogen-related microbes were all significantly correlated with dissolved organic carbon, total nitrogen, available nitrogen, total potassium, and available potassium (P<0.01). ③ Based on T-RFLP data, the α-diversity of nitrogen-related microbes was highest in broadleaf forest, whereas it was lowest in P. pubescen forest. Principal co-ordinates analysis (PCoA) showed that the community structure of ammonia-oxidizing archaea responded significantly to different vegetations, and the community structure of nitrogen-related microbes showed the most difference in coniferous forest. In addition, distance-based redundancy analysis (db-RDA) showed that the community structure of nitrogen-related microbes was mainly shaped by dissolved organic carbon (P<0.001), available nitrogen (P<0.002), and soil water content (P<0.001). ④ Soil-denitrifying enzyme activity was mainly affected by the abundance of nirS-denitrifiers, ammonia-oxidizing archaea, and the community structure of nitrogen-related microbes, whereas nitrifying potential was only controlled by the abundance of ammonia-oxidizing archaea. Above all, subtropical forest vegetation significantly affects the abundance and community structure of soil nitrogen-related microbes, thereby changing their function of controlling the soil nitrogen cycle. This study can provide basic data for the coupling mechanism between soil microbes and N2O release in subtropical forests in China.
© 2020, Science Press. All right reserved. Number of references:59 Main heading:Forestry Controlled terms:Ammonia - Bacteria - Denitrification - Dissolution - Enzyme activity - Landforms - Nitrification - Nitrogen - Organic carbon - Polymerase chain reaction - Polymorphism - Potassium - Soil moisture - Stream flow - Tropics - Vegetation Uncontrolled terms:Ammonia-oxidizing archaea - Coniferous forest soils - Dissolved organic carbon - Environmental factors - Microbial communities - Molecular techniques - Quantitative polymerase chain reaction - Terminal restriction fragment length polymorphisms Classification code:407.2 Waterways - 443 Meteorology - 461.9 Biology - 481.1 Geology - 483.1 Soils and Soil Mechanics - 549.1 Alkali Metals - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 951 Materials Science DOI:10.13227/j.hjkx.201910230 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990466 Title:Subsequent Effects of Slag and Biochar Application on Greenhouse Gas Emissions from Paddy Fields in the Fuzhou Plain Title of translation:炉渣与生物炭施加对福州平原水稻田温室气体排放的后续影响 Authors:Lan, Xing-Fu (1); Wang, Xiao-Tong (1); Zhou, Ya-Xin (1); Jin, Qiang (2); Xu, Xu-Ping (1); Wang, Wei-Qi (2, 3) Author affiliation:(1) College of Life Science, Fujian Normal University, Fuzhou; 350108, China; (2) Institute of Geography, Fujian Normal University, Fuzhou; 350007, China; (3) Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fujian Normal University, Fuzhou; 350007, China Corresponding author:Xu, Xu-Ping(xuping@fjnu.edu.cnemailwangweiqi15@163.com)Wang, Wei-Qi(wangweiqi15@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:489-498 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We investigate whether slag and biochar applications have subsequent effects on greenhouse gas emissions from paddy fields by applying biochar (B), slag (S), and a biochar-slag mix (BS) to paddy fields in the Fuzhou Plain, China. Applications of the three treatments along with a control (CK) of no amendment were made in 2015 before early and late rice seedlings were transplanted. Two years later in 2017, the CO2, CH4, and N2O emissions in the different treatments and control were measured in the early and late rice growing seasons. The results showed that, in the rice growing season, the averaged CO2 emission in the control, biochar, slag, and mixed applications were (1 723.66±194.56), (1 245.52±155.05), (1 140.29±79.68), and (1 055.83±62.13) mg•(m²•h)^-1, respectively. The CO2 emissions from the three treatments were significantly lower than the control group (P<0.05), and the reduction ratios of each treatment to the control were 27.74%, 33.84%, and 38.75%, respectively. The averaged CH4 emissions in the control, biochar, slag, and mixed applications were (0.45±0.03), (0.40±0.05), (0.36±0.10), and (0.25±0.04) mg•(m²•h)^-1, respectively, which were lower, but not significantly so (P>0.05), than the control. The ratios of CH4 emissions from each treatment to the control were 11.11%, 20.00%, and 44.44%, respectively. The averaged N2O emissions from the control, biochar, slag, and mixed applications were (62.47±27.00), (115.09±30.94), (79.75±24.98), and (112.68±23.59) μg•(m²•h)^-1, respectively. In comparison to the control, the biochar, slag, and mixed treatments increased the N2O emissions by 84.23%, 27.66%, and 80.37%, respectively. The global comprehensive warming potential indicated that the application treatments increased the comprehensive warming potential of the early and late rice paddy ecosystems; after 2 years of applying slag and biochar treatments, their effect on the emission reductions were not obvious.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Gas emissions Controlled terms:Carbon dioxide - Emission control - Greenhouse gases - Slags Uncontrolled terms:Control groups - Different treatments - Emission reduction - Growing season - Reduction ratios - Rice paddy ecosystems - Rice seedlings - Warming potential Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 804.2 Inorganic Compounds Numerical data indexing:Age 2.00e+00yr, Percentage 1.11e+01%, Percentage 2.00e+01%, Percentage 2.77e+01%, Percentage 3.38e+01%, Percentage 3.88e+01%, Percentage 4.44e+01%, Percentage 8.04e+01%, Percentage 8.42e+01% DOI:10.13227/j.hjkx.201906217 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070253 Title:High-Frequency Dynamics of Water Quality and Phytoplankton Community in Inflowing River Mouth of Xin'anjiang Reservoir, China Title of translation:新安江水库河口区水质及藻类群落结构高频变化 Authors:Da, Wen-Yi (1, 2); Zhu, Guang-Wei (1); Li, Yun-Xiang (2); Wu, Zhi-Xu (3); Zheng, Wen-Ting (3); Lan, Jia (3); Wang, Yu-Cheng (3); Xu, Hai (1); Zhu, Meng-Yuan (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) College of Environmental Science and Engineering, China West Normal University, Nanchong; 637002, China; (3) Hangzhou Bureau of Ecology and Environment Chun'an Branch, Hangzhou; 311700, China Corresponding author:Zhu, Guang-Wei(gwzhu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:713-727 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The tail of the reservoir is the unstable zone regarding water quality and phytoplankton community. Therefore, it is the crucial zone in aquatic ecosystem transitions. To understand the transition characteristics and driving mechanisms of water environment dynamics, high-frequency monitoring of the water environment and phytoplankton community in the tail of a deep and large reservoir, the Xin'anjiang Reservoir in southeast of China, was conducted using a water quality monitoring buoy and three-day interval water sampling during 18 months. Results show clear seasonal thermal and oxygen stratification in the river mouth of the reservoir. The nutrient and chlorophyll-a concentrations also show stratifying phenomena during the thermal stratification period. Heavy rain and inflow quickly consume the stratification. Nutrient concentrations were highly dynamic in the river mouth. The total phosphorus ranges from 0.011 mg•L^-1 to 0.188 mg•L^-1, and total nitrogen ranges from 0.75 mg•L^-1 to 2.76 mg•L^-1. Dissolved phosphorus comprised 56% of total phosphorus, and dissolved nitrogen occupied 88% of total nitrogen, respectively. Nutrient concentrations were influenced strongly by rainfall intensity and inflow rate. Total phosphorus and nitrogen concentrations were significantly related to the three-day accumulated rainfall. Nutrient concentrations in the flood season (March to June) were significantly higher than in the non-flood season (P<0.001). Seasonal phytoplankton proliferation also significantly influenced by total phosphorus concentration. The phytoplankton community changes significantly with seasons and flood events. Bacillariophytea was generally dominant throughout the year, with the predominant genus of Fragilaria spp., Cyclotella spp., Synedra spp., and Melosira spp. Cyanophyta biomass peaked in July, August, and September, with the dominant genus of Aphanizomenon spp., Microcystis spp., and Oscillatoria spp. Apart from the high temperature, storm inflow events also triggered Cyanophyta proliferation. The proliferation of Chlorophyta was similar to Cyanophyta, with the predominant genus of Pediastrum spp. and Closterium spp.. While the Cryptophyta biomass peaked during March to May, with the predominant genus of Cryptomonas spp.. Redundancy analysis shows that the influence factors of phytoplankton community dynamics include the inflow rate, temperature, water level, water transparency, total nitrogen, total phosphorus, and nitrogen to phosphorus ratio. The meteorological and hydrological factors were major factors for phytoplankton dynamics during later autumn and winter, while the nutrient will be the co-driving factors of phytoplankton community dynamics during summer and early autumn. The research confirmed the huge influence of the intensity rainfall event on the water environment in reservoirs and described the key environmental conditions for phytoplankton community dynamics. The research is useful for the design of the monitoring and forecasting system for water safety in drinking water source reservoirs.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Reservoirs (water) Controlled terms:Aquatic ecosystems - Dynamics - Floods - Nitrogen - Nutrients - Phosphorus - Phytoplankton - Potable water - Rain - Rivers - Thermal stratification - Water levels - Water quality Uncontrolled terms:Chlorophyll-a concentration - Drinking water sources - Environmental conditions - Harmful algae - High-frequency monitoring - Nitrogen concentrations - Water quality monitoring - Water safety Classification code:441.2 Reservoirs - 443.3 Precipitation - 444 Water Resources - 445.2 Water Analysis - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.10e-05kg/m3 to 1.88e-04kg/m3, Mass_Density 7.50e-04kg/m3 to 2.76e-03kg/m3, Percentage 5.60e+01%, Percentage 8.80e+01%, Age 1.50e+00yr DOI:10.13227/j.hjkx.201906143 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070265 Title:Spatio-Temporal Variation of Release Flux of Sediment Nitrogen and Phosphorus in High-Risk Period of Algal Bloom in Lake Erhai Title of translation:洱海藻类水华高风险期沉积物氮磷释放通量时空变化 Authors:Liu, Si-Ru (1, 2); Zhao, Ji-Dong (3); Xiao, Shang-Bin (1); Ni, Zhao-Kui (2); Wang, Sheng-Rui (1, 2, 4) Author affiliation:(1) College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (3) Dali Administration of Erhai Lake Basin, Dali; 671000, China; (4) Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed, Kunming; 650034, China Corresponding author:Wang, Sheng-Rui(wangsr@bnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:734-742 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Spatial and temporal characteristics of release fluxes of sediment nitrogen (N) and phosphorus (P) were investigated in the high-risk period of algal blooms in Lake Erhai. Moreover, the influence factors were examined. Results show that the release flux of N and P increased in recent years, exhibiting a clear increase in the period from 2009 to 2013, and a slight increase in the period since 2013. The release flux of dissolved total nitrogen (DTN) ranged between 11.71-14.15 mg•(m²•d)^-1, within which the release flux of dissolved organic nitrogen (DON) and dissolved inorganic nitrogen (DIN) were 6.39-8.42 mg•(m²•d)^-1 and 5.31-5.73 mg•(m²•d)^-1, accounting for 58% and 42% of the DTN, respectively. The release flux of dissolved total phosphorus (DTP) ranged between 0.11-0.14 mg•(m²•d)^-1, within which the release flux of dissolved organic phosphorus (DOP) and dissolved inorganic phosphorus (DIP) were 0.04-0.05 mg•(m²•d)^-1 and 0.07-0.09 mg•(m²•d)^-1, accounting for 34% and 66% of the DTP, respectively. The distribution of release flux of N showed a decreasing order: south>north>middle, while P was north>middle>south. The release flux of N increased by 17%, 13% and 23%, and the release flux of P increased by 19%, 28%, and 29% in north, middle, and south part of Lake Erhai from 2009 to 2018. Comparing the years 2009, 2013 and 2018, although the contents of N and P were stable, the release flux of N and P in the sediment was enhanced due to increasing pH and decreasing DO. Therefore, the increasing release of nitrogen and phosphorus from sediments, caused by changes in the water environment factors, should be paid attention to for the protection of Lake Erhai.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Phosphorus Controlled terms:Dissolution - Lakes - Nitrogen - Sediments Uncontrolled terms:Dissolved inorganic nitrogens - Dissolved inorganic phosphorus - Dissolved organic nitrogen - Dissolved organic phosphorus (DOP) - Impact factor - Nitrogen and phosphorus - Spatio-temporal variation - Temporal and spatial variation Classification code:483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 1.30e+01%, Percentage 1.70e+01%, Percentage 1.90e+01%, Percentage 2.30e+01%, Percentage 2.80e+01%, Percentage 2.90e+01%, Percentage 3.40e+01%, Percentage 4.20e+01%, Percentage 5.80e+01%, Percentage 6.60e+01% DOI:10.13227/j.hjkx.201907160 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278155 Title:Adsorption Characteristics of Sulfamethazine on Three Typical Porous High-temperature Modified Solid Waste Materials Title of translation:3种典型多孔高温改性固废材料对磺胺二甲嘧啶的吸附特性 Authors:Wang, Jing (1, 2); Zhu, Xiao-Li (1); Han, Zi-Yu (2); Hu, Jian (2); Qin, Zhi-Rui (2); Jiao, Wen-Tao (2) Author affiliation:(1) College of Urban and Environmental Science, Northwest University, Xi'an; 710127, 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:Jiao, Wen-Tao(wtjiao@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1319-1328 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Three typical porous solid wastes, including livestock manure, crop straw, and coal mining waste, were used as raw materials to prepare cattle manure charcoal, straw charcoal, and coal gangue charcoal by low-oxygen controlling temperature carbonization and calcination. Batch adsorption experiments of sulfamethazine (SMZ) in water were carried out. Adsorption kinetics and isothermal adsorption equilibrium were used to investigate the adsorption characteristics of SMZ on cattle dung charcoal, straw charcoal, and coal gangue charcoal, and the adsorption mechanism was discussed by means of field-electron scanning electron microscope, Fourier transform infrared spectroscopy, Boehm titration, Brunauer-Emmett-Teller measurement, and zeta potentiometric titration. The results showed that the adsorption of SMZ on the three carbon materials reached equilibrium at 24 h. The adsorption kinetics of SMZ on three kinds of carbon materials agreed with the quasi-second-order kinetics equation. R² ranged from 0.996 8 to 0.999 9, and the adsorption rate decreased with the decrease in effective adsorption sites on the surface of carbon materials. The adsorption process mainly consists of three steps: membrane diffusion, intraparticle diffusion, and the equilibrium stage. Both intraparticle diffusion and membrane diffusion control the adsorption rate. Isothermal adsorption is more consistent with the Freundlich model. R² is between 0.987 4 and 0.999 7. It is mainly physical adsorption and spontaneous exothermic reaction. The maximum adsorption capacity of the three kinds of carbon materials was cattle dung carbon (19.64 mg•g^-1)>coal gangue carbon (12.06 mg•g^-1)>straw carbon (9.16 mg•g^-1). The adsorption mechanism of SMZ on the three kinds of carbon materials mainly includes hydrogen bonding between molecules, surface electrostatic adsorption of multi-molecular layers, and pore filling. Of these, electrostatic adsorption is the main adsorption mechanism. The best adsorption performance of cattle manure charcoal may be due to its rich oxygen-containing functional groups, more negative charges, and larger specific surface area and pore volume.
© 2020, Science Press. All right reserved. Number of references:53 Main heading:Adsorption Controlled terms:Agriculture - Carbon - Charcoal - Coal - Coal carbonization - Coal industry - Coal tailings - Diffusion - Electrostatics - Fertilizers - Fourier transform infrared spectroscopy - Hydrogen bonds - Isotherms - Kinetics - Manures - Oxygen - Scanning electron microscopy - Solid wastes - Titration - Voltammetry Uncontrolled terms:Adsorption characteristic - Batch adsorption experiments - Characteristics - Electrostatic adsorption - High temperature modification - Oxygen-containing functional groups - Potentiometric titrations - Sulfamethazine Classification code:524 Solid Fuels - 701.1 Electricity: Basic Concepts and Phenomena - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes - 931 Classical Physics; Quantum Theory; Relativity Numerical data indexing:Time 8.64e+04s DOI:10.13227/j.hjkx.201908210 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278047 Title:Chemical Evolution of Groundwater in the Tacheng Basin of Xinjiang in the Process of Urbanization Title of translation:城镇化进程中新疆塔城盆地浅层地下水化学演变特征及成因 Authors:Lü, Xiao-Li (1, 2); Liu, Jing-Tao (1); Han, Zhan-Tao (1, 2); Zhou, Bing (1); Zhu, Liang (1); Chen, Xi (1) Author affiliation:(1) Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang; 050061, China; (2) Hebei and China Geological Survey Key Laboratory of Groundwater Remediation, Shijiazhuang; 050061, China Corresponding author:Liu, Jing-Tao(728881944@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1197-1206 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the development of the local economy, the volume of groundwater production has increased continuously in the past decades in the Tacheng Basin of the Xinjiang Uygur Automous Region. Previous studies have not provided a clear pattern of the chemical composition evolution of groundwater and its driving force in this basin, which makes the future development and utilization of groundwater riskier. This study carried out systematic sampling and analysis of groundwater chemistry in this basin, and the chemical evolution of groundwater in the basin was analyzed by comparison with historical hydrochemical data. The results show that Ca²⁺ and Na⁺ are the main cations in the groundwater, HCO3^-, SO4^2- are the main anions in the groundwater, and freshwater is widely distributed. The chemical types of groundwater changed from HCO3-Ca and HCO3•SO4-Ca•Mg in the source zone in front of the mountains to SO4•HCO3-Na•Ca type in the plain area. In comparison with the hydrochemical data of 1979, HCO3 and SO4•HCO3 type groundwater increased significantly. SO4 and Cl type groundwater with high total dissolved solids decreased significantly. However, the Cl^- and SO4^2- concentration and total hardness in the groundwater around the cities and towns increased. Aquifer material and the change of flowing field are the two controlling factors of groundwater chemical change, but the leakage of waste water from city drainage channels also affects the groundwater chemistry drastically.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Hydrochemistry Controlled terms:Aquifers - Chemical analysis - Groundwater resources Uncontrolled terms:Abnormal recognition - Controlling factors - Hydro geochemistries - Tacheng Basin - Urbanization Classification code:444.2 Groundwater - 481.2 Geochemistry DOI:10.13227/j.hjkx.201908192 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278112 Title:CDOM Optical Characteristics and Related Environmental Factors of High-turbidity Waters on the Loess Plateau Title of translation:黄土高原高浑浊水体CDOM光学特性及影响因素 Authors:Liang, Xiao-Wen (1, 2); Shao, Tian-Tian (1); Wang, Tao (1, 2) Author affiliation:(1) Key Research Institute of Yellow River Civilization and Sustainable Development and Collaborative Innovation Center on Yellow River Civilization, Henan University, Kaifeng; 475001, China; (2) College of Environment and Planning, Henan University, Kaifeng; 475004, China Corresponding author:Shao, Tian-Tian(shaott2010@yeah.net) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1217-1226 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Chromophoric dissolved organic matter (CDOM) optical absorption characteristics, CDOM spectral slopes (S275-295), contribution of each component to water absorption, and the effects of environmental factors on them were analyzed to determine the sources and composition of CDOM in high-turbidity waters on the Loess Plateau. Samples in rivers and lakes (saline and freshwater) in the Loess Plateau area of Shaanxi and Inner Mongolia were collected in May 2018. The results demonstrated significant differences in CDOM absorption optical characteristics between rivers and lakes. The average aCDOM(440) (CDOM concentration, 8.45 m^-1) in lakes was higher than that of rivers (2.70 m^-1), and the saline lakes showed a higher CDOM concentration (13.52 m^-1) than the freshwater lakes (3.38 m^-1). Moreover, the light utilization efficiency of freshwater lakes is higher than that of saline lakes and turbid rivers. Great differences in pH and dissolved organic carbon (DOC) were observed between different types of water (P<0.01). The differences in electrical conductivity (EC), turbidity (Tur), and total suspended matter concentration (TSM) were significant with no statistical significances (P>0.1). The chlorophyll a concentration (Chla) in saline lakes was close to the Chla concentration in freshwater lakes if extreme values were excluded. In addition, the CDOM molecular weights of lake water were lower than those in the rivers, while CDOM molecular weights in saline lakes were lower than those in freshwater lakes based on the S275-295. Analyses of specific ultraviolet absorbance (SUVA254) were also conducted to determine the sources of CDOM in different water types, and the results showed that the more terrigenous humus were brought into the rivers and saline lakes compared with the freshwater lakes. Redundancy analysis (RDA) indicated that river and lake water quality parameters of the cumulative variance explained rates were 35.2% for river samples and 61.4% for lake samples, and 100% for samples in the saline and freshwater lakes individually. The results of RDA showed that dissolved oxygen (DO), water temperature, and EC exerted significant effects on CDOM optical properties of the river (P<0.01), while DOC, TSM, and Tur had a great influence on the CDOM optical properties of lakes (P<0.01). There was a strong correlation between pH and CDOM in the saline lakes, while DOC was significantly correlated with CDOM in the freshwater lakes (P<0.05).
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Lakes Controlled terms:Biochemical oxygen demand - Biogeochemistry - Dissolution - Dissolved oxygen - Landforms - Light absorption - Molecular weight - Optical materials - Optical properties - Organic carbon - Quality control - Redundancy - Rivers - Saline water - Sediments - Soils - Turbidity - Water absorption - Water quality Uncontrolled terms:Absorption characteristics - Chlorophyll-a concentration - Chromophoric dissolved organic matter - Dissolved organic carbon - Loess Plateau - Redundancy analysis (RDA) - Specific ultraviolet absorbance - Water quality parameters Classification code:444 Water Resources - 445.2 Water Analysis - 481.1 Geology - 481.2 Geochemistry - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 931.3 Atomic and Molecular Physics Numerical data indexing:Percentage 1.00e+02%, Percentage 3.52e+01%, Percentage 6.14e+01% DOI:10.13227/j.hjkx.201908244 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256446 Title:Bacillus amyloliquefaciens Biofertilizer Mitigating Soil Ammonia Volatilization Title of translation:解淀粉芽孢杆菌生物有机肥防控土壤氨挥发 Authors:Yang, Ya-Hong (1); Xue, Li-Xia (1, 2); Sun, Bo (2, 3); Zhang, Bao (1, 2); Zhuang, Xu-Liang (2, 3); Zhuang, Guo-Qiang (2, 3); Bai, Zhi-Hui (2, 3) Author affiliation:(1) School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Bai, Zhi-Hui(zhbai@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4711-4718 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, we investigated the effectiveness and microbial mechanism of Bacillus amyloliquefaciens biofertilizer on reducing ammonia volatilization in farmland soil. Pot experiments were carried out to explore the effects of B. amyloliquefaciens biofertilizer (BB) and chemical fertilizer on soil ammonia volatilization, crop yield and quality, and soil microbial community. Four fertilization strategies were tested, namely no fertilizer (CK), 100% chemical fertilizer (C), 50% BB and 50% chemical fertilizer (B1), and 100% BB (B2). The dynamic flow-through chamber method was used to determine the soil ammonia volatilization flux after fertilization. The soil bacterial community during the peak period of ammonia volatilization was analyzed using 16S rDNA high-throughput sequencing. The results showed that the amount of ammonia volatilization in B1 and B2 decreased by 79.5% and 84.8%, respectively, as compared with treatment C. B2 had the lowest nitrate content and the highest yield; the yield of B2 increased by 50.5% and 12.3% as compared to that of CK and C, respectively. B1 had the highest content of vitamin C, which was 67.6 mg•kg^-1. The application of BB improved the diversity and richness of soil bacterial community, especially the relative abundance of Bacillus and Nitrospira. This shows that BB plays an important role in preventing air pollution and improving nitrogen utilization.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Fertilizers Controlled terms:Ammonia - Bacteria - Bacteriology - Soils Uncontrolled terms:Ammonia volatilization - Bacillus amyloliquefaciens - Chemical fertilizers - High-throughput sequencing - Nitrogen utilization - Relative abundance - Soil bacterial community - Soil microbial community Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.00e+02%, Percentage 1.23e+01%, Percentage 5.00e+01%, Percentage 5.05e+01%, Percentage 7.95e+01%, Percentage 8.48e+01% DOI:10.13227/j.hjkx.201910157 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256356 Title:Effects of Exogenous Phosphorus on Rice Growth and Cadmium Accumulation and Transportation Under Cadmium Stress Title of translation:外源磷对镉胁迫下水稻生长及镉累积转运的影响 Authors:Huo, Yang (1); Qiu, Yin-Yan (1); Zhou, Hang (1, 2); Hu, Yu-Dan (1); Deng, Peng-Hui (1); Wei, Bin-Yun (1); Gu, Jiao-Feng (1, 2); Liu, Jun (3); Liao, Bai-Han (1, 2) Author affiliation:(1) College of Environmental 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; (3) Key Laboratory of Hengyang City on Ecological Impedance Technology of Heavy Metal Pollution in Cultivated Soil of Nonferrous Metal Mining Area, Hengyang; 421001, China Corresponding author:Zhou, Hang(zhouhang4607@163.comemailgujiaofeng@163.com)Gu, Jiao-Feng(gujiaofeng@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4719-4725 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, we investigated the effects of exogenous phosphorus on the accumulation and transportation of cadmium in rice plants through a hydroponic experiment. In the experiment, the rice variety was Huanghuazhan, P solution concentrations were 10.0-45.0 mg•L^-1 that was made using NaH2PO4, and Cd solution concentrations were 0.1 mg•L^-1 and 0.2 mg•L^-1. The results showed that: ① the biomass in all parts of rice plants and contents of photosynthetic pigment (chlorophyll a, chlorophyll b, and carotenoid) increased gradually with an increase in exogenous P. ② Content of Cd in rice stems, leaves, husk, and brown rice increased gradually with an increase in the amounts of exogenous P. The content of Cd in brown rice increased by 2.8%-22.8% and 40.9%-61.8% when treated with Cd concentrations of 0.1 mg•L^-1 and 0.2 mg•L^-1 in hydroponic solutions, respectively. ③ Cd accumulation in rice plants was accelerated due to the application of exogenous P. Cd accumulating amounts increased from 395.1 μg•plant^-1 to 542.6 μg•plant^-1 and 639.6 μg•plant^-1 to 1 082.0 μg•plant^-1 when treated with Cd concentrations of 0.1 and 0.2 mg•L^-1 in hydroponic solutions, respectively. ④ With an increase in the applied amounts of exogenous P, the P/Cd quality ratio in rice roots increased, while those in rice stems, leaves, husks, and brown rice decreased; meanwhile, the Cd transfer coefficients from root to stem (TFroot-stem) and stem to leaf (TFstem-leaf) increased. This showed that there was a certain synergistic effect between P and Cd in the rice parts. Finally, the application of exogenous P promoted the transfer of Cd from the rice root to other rice tissues, resulting in a synergistic effect on Cd accumulation and transportation in various rice tissues and increased Cd contents in brown rice.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Pollution Controlled terms:Cadmium - Chlorophyll - Histology - Phosphorus - Plants (botany) - Tissue Uncontrolled terms:Cd accumulation - Cd concentrations - Hydroponic experiments - Hydroponic solution - Photosynthetic pigments - Solution concentration - Synergistic effect - Transfer coefficient Classification code:461.2 Biological Materials and Tissue Engineering - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 4.50e-02kg/m3, Mass_Density 1.00e-04kg/m3, Mass_Density 1.00e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e-04kg/m3, Mass_Density 2.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 2.80e+00% to 2.28e+01%, Percentage 4.09e+01% to 6.18e+01% DOI:10.13227/j.hjkx.202003048 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106271 Title:Characterization of Two Heavy Pollution Episodes in Tianjin in 2020 Title of translation:2020年天津市两次重污染天气污染特征分析 Authors:Xiao, Zhi-Mei (1); Xu, Hong (1); Cai, Zi-Ying (2); Li, Peng (1); Liu, Bin (1); Yuan, Jie (1); Zheng, Nai-Yuan (1); Tang, Miao (1); Chen, Kui (1); Deng, Xiao-Wen (1) Author affiliation:(1) Tianjin Eco-Environmental Monitoring Center, Tianjin; 300191, China; (2) Tianjin Environmental Meteorological Center, Tianjin; 300074, China Corresponding author:Chen, Kui(kuichen@126.comemaildxwpp@163.com)Deng, Xiao-Wen(dxwpp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3879-3888 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:High-resolution online monitoring data from January to February in 2020 was used to study the characterization of two heavy pollution episodes in Tianjin in 2020; the heavy pollution episode that lasted from January 16 to 18, 2020 (referred to as episode Ⅰ) and that from February 9 to 10, 2020 (referred to as episode Ⅱ) were analyzed. The results showed that two heavy pollution episodes were influenced by regional transportation in the early stage and local adverse meteorological conditions in the later stage. During these episodes, the average wind speed was low, the average relative humidity was close to 70%, and relative humidity approached the saturated, the boundary layer heights were below 300 m, and the horizontal and vertical diffusion conditions were poor. Compared to episode Ⅰ, the concentration of pollutants decreased during episode Ⅱ, especially for the concentration of NO2. During the episode Ⅱ, the concentrations of PM2.5 and CO were higher in the north of Tianjin. The chemical component concentrations and their mass ratios to PM2.5 changed significantly in both episodes; the concentrations of secondary inorganic ions (NO3^-, SO4^2-, and NH4⁺), elemental carbon (EC) and Ca²⁺were higher in episode Ⅰ, the concentrations of organic carbon (OC) and Cl^- slightly increased in episode Ⅱ; and the concentrations of K⁺were higher in episode Ⅱ. Compared to episode Ⅰ, because of the increase in the combustion sources and significant reductions in the number of vehicles, the mass ratios of SO4^2-, OC, and K⁺ to PM2.5 increased while the mass ratios of NO3^- and EC to PM2.5 decreased in episode Ⅱ; the mass ratios of NH4⁺ and Cl^- to PM2.5 were relatively higher due to the continuity of the industrial production processes; the mass ratios of Ca²⁺ to PM2.5 were lower in two heavy pollution episodes because construction activities were halted. Source apportionment of PM2.5 was performed using the positive matrix factorization (PMF) model. In episode Ⅰ, the major sources of PM2.5 in Tianjin were secondary sources, industrial and coal combustion, vehicle exhaust, crustal dust, fireworks and biomass burning, with contributions of 53.8%, 20.2%, 18.6%, 6.3%, and 1.1%, respectively. In episode Ⅱ, the same sources were identified in the PMF analysis with contributions of 48.3%, 28.2%, 8.7%, 2.6%, and 12.2%, respectively. Compared to episode Ⅰ, the contributions of industrial and coal combustion, fireworks and biomass burning increased, and the contributions of secondary sources, vehicle exhaust, and crustal dust decreased in episode Ⅱ; contributions of vehicle exhaust and crustal dust decreased by 53.2% and 58.7%, respectively.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Coal combustion Controlled terms:Air pollution - Boundary layers - Chlorine compounds - Coal dust - Construction industry - Explosives - Factorization - Organic carbon - Vehicles - Wind Uncontrolled terms:Boundary layer heights - Combustion sources - Construction activities - Industrial production - Meteorological condition - Positive matrix factorization models - Regional transportation - Source apportionment Classification code:405 Construction Equipment and Methods; Surveying - 443.1 Atmospheric Properties - 451 Air Pollution - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.10e+00%, Percentage 1.22e+01%, Percentage 1.86e+01%, Percentage 2.02e+01%, Percentage 2.60e+00%, Percentage 2.82e+01%, Percentage 4.83e+01%, Percentage 5.32e+01%, Percentage 5.38e+01%, Percentage 5.87e+01%, Percentage 6.30e+00%, Percentage 7.00e+01%, Percentage 8.70e+00%, Size 3.00e+02m DOI:10.13227/j.hjkx.202003109 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106240 Title:Ozone Sensitivity Analysis and Emission Controls in Dezhou in Summer Title of translation:德州市夏季臭氧敏感性特征及减排方案 Authors:Yan, Ru-Sha (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 Corresponding author:Yan, Ru-Sha(yanrs@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3961-3968 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, there have been frequent ozone pollution episodes in Dezhou, China. In the summer of 2018 (from June to August), Dezhou experienced serious ozone pollution episodes. The daily 8-hour maximum ozone concentrations exceeded the national standard for 60 days with the standard exceeding ratio of 65%. The average of daily 8-hour maximum ozone concentration was 176 μg•m^-3 over these three months, and the highest value reached was 262 μg•m^-3. In this study, the WRF-CAMx model coupled with the higher-order decoupled direct method (HDDM) was used to analyze the ozone sensitivity and emission control plans in Dezhou during this period. The results showed that ozone formation was in the strong VOC-limited regime in the urban area of Dezhou, while it was in the NOx and VOCs transition regime in suburban areas. VOCs sensitivity values (dO3_V50) were positive every day in summer, which was higher in June (18.7 μg•m^-3 in urban area, 19.7 μg•m^-3 in suburban area) and August (15.3 μg•m^-3 in urban area, 16.4 μg•m^-3 in suburban area) than in July (13.0 μg•m^-3 in urban area, 11.8 μg•m^-3 in suburban area). NOx sensitivity values (dO3_N50) were positive or negative in the urban area, and most days were positive in the suburban area, which were close to the VOCs sensitivity values. For urban areas, VOC reduction should be the priority for emission reduction plans, whereas for suburban areas, NOx:VOCs=1:1 is recommended because the reductions in NOx and VOCs emissions had the same effect on ozone pollution control.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Air pollution Controlled terms:Emission control - Nitrogen oxides - Ozone - Sensitivity analysis Uncontrolled terms:Decoupled direct methods - Emission reduction - National standard - Ozone concentration - Ozone formation - Ozone sensitivity - Sensitivity values - Transition regimes Classification code:451 Air Pollution - 451.2 Air Pollution Control - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 921 Mathematics Numerical data indexing:Age 1.64e-01yr, Percentage 6.50e+01%, Time 2.88e+04s DOI:10.13227/j.hjkx.202001197 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256458 Title:Key Stage of As Accumulation in Rice Under As Stress at Different Growth Stages Title of translation:水稻不同生育期As胁迫下As累积关键生育期 Authors:Deng, Peng-Hui (1); Cai, Ya-Qin (1); Zhou, Hang (1, 2); Liu, Ya (1); Yang, Wen-Jun (1); Gu, Jiao-Feng (1, 2); Liao, Bo-Han (1, 2) Author affiliation:(1) College of Environmental 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 author:Zhou, Hang(zhouhang4607@163.comemailgujiaofeng@163.com)Gu, Jiao-Feng(gujiaofeng@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4726-4732 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The absorption and accumulation of As at different stages of rice growth are significantly different. To study the key growth stages of As accumulation in brown rice and to determine the contribution of As accumulation at different growth stages to As contribution in brown rice, a rice hydroponics experiment was carried out by adding external As during the different rice growth stages: tillering stage (30 d), jointing stage (16 d), booting stage (13 d), filling stage (17 d), dough stage (15 d), maturity stage (13 d), and full growth period (104 d). The results showed that: ① As stress at different growth stages had a significant effect on the biomass of rice plants. In comparison with the control CK, the treatments of As stress with five single-stages decreased the rice biomass, except during the tillering stage. Among these treatments, although the As stress at booting stage had the lowest rice biomass, the biomass of all the rice plants were higher than that for As stress in the full growth period. ② The content of As in brown rice for all the treatments of As stress at six single-stages, ranging from 0.08-0.24 mg•kg^-1, was higher than that of CK. Among these six treatments, the As stress at booting stage had the highest As content in brown rice, accounting for 64.9% of the As content in the full growth period. ③ The accumulation of As in brown rice for all the treatments of As stress at six single-stages was higher than that of CK, and ranged from 1.4-1.5 μg•plant^-1. Among these six treatments, the As stress at booting stage had the highest As accumulation, followed by filling stage. The accumulation of As in brown rice treated with As stress was highest in the full growth period with a value of 5.7 μg•plant^-1. ④ The relative contribution of As stress at the booting stage was the highest for the As accumulation in brown rice and reached to 40.3%, followed by filling stage with 26.0%. Therefore, the rice growth stages of the booting stage and filling stage were the key stages of As accumulation in brown rice.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Ecology Controlled terms:Biomass - Filling Uncontrolled terms:Different growth stages - Different stages - Filling stage - Growth period - Growth stages - Maturity stages - Relative contribution - Single stage Classification code:454.3 Ecology and Ecosystems - 691.2 Materials Handling Methods Numerical data indexing:Percentage 2.60e+01%, Percentage 4.03e+01%, Percentage 6.49e+01% DOI:10.13227/j.hjkx.202004087 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256239 Title:Investigation on the Emission Difference of Air Pollutants from Common Residential Coal Stoves and Suggestions for Emission Reduction Title of translation:不同居民燃煤炉具大气污染物排放差异性及减排分析 Authors:Zhang, Yi-Chen (1, 2); Xue, Chen-Li (1, 2); Liu, Jie (1, 2); Zhong, Lian-Hong (2); Xue, Yi-Feng (2) Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China Corresponding author:Zhong, Lian-Hong(zhonglianhong@cee.cnemailxueyifeng@cee.cn)Xue, Yi-Feng(xueyifeng@cee.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4462-4469 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the difference in the emission of air pollutants from coal stoves, five new and common residential coal stoves (square briquette, baffled heat exchange, heating and cooking integrated gasification positive burning, and gasification reverse burning stove) were selected. The emission level of major air pollutants was determined using simulated combustion in the laboratory for quantitatively evaluating the environmental effects of different coal stoves. Moreover, the factors and reasons for the differences were identified, and suggestions for the reduction of emission were proposed. The results showed that: ① the emissions of air pollutants from different coal stoves were significantly different; the heating and cooking integrated stove had the largest emission intensity (2.9 kg•t^-1) of air pollutants (SO2, NOx, and TSP), which was 1.6 times of the average value, and the square briquette stove had the lowest emission level, which was 65% of the average value. ② The emissions of gaseous pollutants from the coal stoves in different combustion stages also showed evident differences. In the high-fire stage, the NOx emission concentration of the square briquette stove was 0.49 mg•m^-3, which was 45%-72% lower than that of the other stoves; the SO2 emission concentration of the gasification reverse burning stove was 1.38 mg•m^-3, which was 28% lower than that of the other stoves. ③ The application technology and combustion type were the main factors affecting the emission levels of the coal stoves. The stove with square briquette technology and gasification reverse burning technology could have great environmental benefit. However, the cost of the two stoves was 20 and 18 thousand yuan, respectively, which was clearly higher than that of the other types of stoves. ④ Considering the difference in the emission of air pollutants from the different stoves, it was suggested to adopt differentiated economic policy and strict emission and product standards, promoting the use of energy-saving and environment-friendly coal stoves to reduce the emission of air pollutants from coal-fired stoves.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Stoves Controlled terms:Air pollution - Briquets - Coal - Coal combustion - Coal industry - Economics - Emission control - Energy conservation - Energy policy - Environmental technology - Fog - Gasification - Housing - Nitrogen oxides - Sulfur dioxide Uncontrolled terms:Application technologies - Economic policies - Emission intensity - Emission reduction - Energy-saving and environments - Environmental benefits - Gaseous pollutants - Reduction of emissions Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 451 Air Pollution - 451.2 Air Pollution Control - 454 Environmental Engineering - 524 Solid Fuels - 525.2 Energy Conservation - 525.6 Energy Policy - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 971 Social Sciences Numerical data indexing:Percentage 2.80e+01%, Percentage 4.50e+01% to 7.20e+01%, Percentage 6.50e+01% DOI:10.13227/j.hjkx.202002188 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105139 Title:Effects of Land Use Changes on Soil Bacterial Community Diversity in the Riparian Wetland Along the Downstream of Songhua River Title of translation:松花江下游沿江湿地土地利用变化对土壤细菌群落多样性的影响 Authors:Zhang, Tuo (1); Xu, Fei (1, 2); Huai, Bao-Dong (2); Yang, Xue (1, 2); Sui, Wen-Zhi (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 Corresponding author:Xu, Fei(29162038@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4273-4283 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The aim of this study was to provide a theoretical basis for the restoration of degraded wetlands in the Songhua River by determining the effect of habitat quality changes on the soil bacterial community. The 16S rDNA of soil bacteria in five land use types (natural wetland, paddy field, corn field, sand mining slash, restoration wetland) of the riparian wetland along the downstream of the Songhua River was sequenced using the Illumina MiSeq PE300 high-throughput sequencing platform. The differences in the community diversity and functions of soil bacteria for different land use types were analyzed. ACE, Chao1, and Shannon indices of soil bacterial diversity were significantly reduced by reclaiming the wetland into the corn field (P<0.05), and they were significantly improved by wetland restoration in the sand mining slash (P<0.05). The differences in the soil bacterial community structure were significant among natural wetlands, paddy fields, corn fields, and sand mines (P<0.05). Similar bacterial community structures were found in sand mining slash and restoration wetlands. Soil bacteria in the riparian wetland can be divided into 40 phyla, 105 classes, 258 orders, 421 families, 802 genera, and 1673 species. Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, Bacteroidetes, Verrucomicrobia, Firmicutes, and Gemmatimonadetes were the dominant phyla (relative abundance>1%). In contrast, Bacteroidetes preferred the soil under the paddy environment, Proteobacteria and Gemmatimonadales preferred the soil environment of corn, and Actinobacteria preferred the soil environment of sand mining slash. Wetland soil bacteria have six primary metabolic pathways (metabolism, environmental information processing, genetic information processing, cellular processes, human disease, and organismal systems) and 46 secondary metabolic pathways including 19 types of main secondary metabolic pathways (relative abundance>1%). Diversity of the soil fungal community was significantly influenced by soil pH, moisture content, available nitrogen, and the C/N ratio. Hence, potential ecological risks increased and ecosystem stability decreased because of the resource development activities in natural wetlands. Diversity of the soil fungal community plays a critical role in protecting the ecological security and supplying considerable amounts of undeveloped resources.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Soils Controlled terms:Bacteria - Ecosystems - Fungi - Genes - Land use - Metabolism - Restoration - Rivers - Sand - Wetlands Uncontrolled terms:Bacterial community structure - Different land use types - Environmental information - High-throughput sequencing - Potential ecological risk - Secondary metabolic pathways - Soil bacterial community - Soil fungal communities Classification code:403 Urban and Regional Planning and Development - 454.3 Ecology and Ecosystems - 461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics DOI:10.13227/j.hjkx.202003088 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256519 Title:Emission Inventory of VOCs Components in Zhengzhou and Their Ozone Formation Potential Title of translation:郑州市VOCs组分排放清单及其臭氧生成潜势 Authors:Lu, Xuan (1); Zhang, Rui-Qin (1); Han, Luo-Kai (2) Author affiliation:(1) Research Institute of Environmental Science, College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Henan Broadcasting System 102, Zhengzhou; 450002, China Corresponding author:Han, Luo-Kai(61179734@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4426-4435 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, according to the activity levels of volatile organic compounds (VOCs) sources and source profiles, a 2016-based inventory of the speciation emission of the VOCs was established and the ozone formation potential (OFP) were estimated in Zhengzhou. The results showed that the total VOCs emission in Zhengzhou in 2016 was 96 215.3 t. The highest emission source was on-road mobile source (29.7%) followed by solvent use sources (28.1%). The species that contributed the highest emission was alkanes (29.8%) followed by aromatics (29.0%). The OFP in Zhengzhou in 2016 was 341 291.0 t with the highest contributing source as on-road mobile (30.5%) followed by solvent use source (28.8%). Moreover, the light duty gasoline vehicle, use of interior wall coatings, vehicle surface coating, gas station loading and unloading, and manufacture of non-metallic mineral were the major secondary emission sources of OFP, which needed to be controlled for reducing ozone pollution in Zhengzhou. For VOCs species group, the higher contribution groups were aromatics (42.8%) and alkenes (38.9%). The sources that produced m/p-xylene, propylene, ethylene, and other species should be paid more attention.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Light weight vehicles Controlled terms:Automobile manufacture - Coatings - Ethylene - Gas plants - Mineral industry - Ozone - Roads and streets - Secondary emission - Unloading - Volatile organic compounds Uncontrolled terms:Emission inventories - Emission sources - Light duty gasoline vehicles - Loading and unloading - Nonmetallic minerals - On-road mobile sources - Ozone formation potentials - Source profiles Classification code:406.2 Roads and Streets - 522 Gas Fuels - 662.1 Automobiles - 691.2 Materials Handling Methods - 804 Chemical Products Generally - 804.1 Organic Compounds - 813.2 Coating Materials Numerical data indexing:Percentage 2.81e+01%, Percentage 2.88e+01%, Percentage 2.90e+01%, Percentage 2.97e+01%, Percentage 2.98e+01%, Percentage 3.05e+01%, Percentage 3.89e+01%, Percentage 4.28e+01% DOI:10.13227/j.hjkx.201912192 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990491 Title:Characteristic of Surface Ozone and Meteorological Parameters Analysis in Anyang City Title of translation:安阳市近地面臭氧污染特征及气象影响因素分析 Authors:Yang, Jian (1); Yin, Sha-Sha (1); Yu, Shi-Jie (1); Wang, Li-Juan (2); Zhang, Rui-Qin (1); Hao, Jian-You (3); Su, Fang-Cheng (1); Qi, Yan-Jie (1) Author affiliation:(1) Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou; 450001, China; (2) Chinese Academy for Environmental Planning, Beijing; 100012, China; (3) Anyang Ecological Environment Bureau, Anyang; 455000, China Corresponding author:Yin, Sha-Sha(shashayin@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:115-124 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study uses the national ambient air quality station data of Anyang City from 2014 to 2017 to analyze the characteristics and variation rules of ozone (O3) in different functional zones (urban, suburban, and industrial), and also studies meteorological influencing factors and potential source distributions of O3 pollution. The results showed that the O3 concentration in Anyang increased significantly between 2014 and 2017, whereby pollution started to advance from 2015 and the earliest occurrence of an O3 pollution episode was in April 2017. The 90^th percentile and average concentrations of O3 in the industrial zone increased at faster rates (average annual growth of 16.0 μg•m^-3 and 13.0 μg•m^-3, respectively) than of those in the urban and suburban zones. The O3 concentrations at the suburban site showed the fastest increase of all zones at the 5^th percentile (average annual growth of 13.2 μg•m^-3). The monthly variation in O3 concentrations in Anyang showed an "M" pattern that varied spatially depending on the zone. Temperature played a leading role in O3 concentrations; air temperatures >23℃, relative humidity <58%, and a wind speed of 5 m•s^-1 in a south-southwesterly direction were closely related to the occurrence of high O3 concentrations. Potential sources of O3 in different seasons were significantly different, and mainly distributed in southern Hebei, northern Hubei, and northern Shenyang in summer. The first heavy O3 pollution day in the studied period was in May 2017, at which time the highest O3 concentration was found in the industrial zone (up to 405 μg•m^-3). This heavy O3 pollution episode was related to the continuous high temperature that was caused by the transfer of a dry, hot air mass in western China.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Urban growth Controlled terms:Air quality - Ozone - Wind Uncontrolled terms:Ambient air quality - Average annual growth - Average concentration - High temperature - Industrial zones - Meteorological parameters - Pollution episodes - Potential sources Classification code:403.1 Urban Planning and Development - 443.1 Atmospheric Properties - 451.2 Air Pollution Control - 804 Chemical Products Generally Numerical data indexing:Velocity 5.00e+00m/s to 2.20e+01m/s DOI:10.13227/j.hjkx.201907244 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256295 Title:Occurrence Characteristics and Quality Estimation of Microplastics in Drainage Ditches in Hetao Irrigation District of Inner Mongolia Title of translation:内蒙古河套灌区排水干沟微塑料赋存特征及质量估算 Authors:Wang, Zhi-Chao (1); Yang, Fan (1); Yang, Wen-Huan (1); Li, Wei-Ping (1); Yang, Jian-Lin (1); Qin, Yi-Ming (1); Li, He (2) Author affiliation:(1) School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou; 014010, China; (2) Inner Mongolia Irrigation and Drainage Development Center, Hohhot; 010020, China Corresponding author:Li, Wei-Ping(sjlwp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4590-4598 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Microplastic pollution due to land runoff has gained increasing attention as it is closely associated with human beings. In this study, we analyzed the occurrence characteristics of microplastics in drainage channel and main drainage channel in Hetao irrigation district of Inner Mongolia and estimated its quality. Through field sampling, the density separation of suspension method and microscope observation, Fourier infrared spectrum measurement, and proportional flow method, the abundance distribution, shape, color, particle size, and chemical composition of microplastics in the water body and sediment of the drainage channel and main drainage channel in the Hetao irrigation district were identified. The mass of microplastics transported in the main drainage channel was also estimated. The results showed that the value range of microplastic abundance in the water body of the drainage channel and the main drainage channel in Hetao irrigation district was 2 880-11 200 n•m^-3, and the value range of microplastic abundance in the sediment was 100-292 n•kg^-1. Fiber was the most common microplastic form, occupying 34.98%-70.39% and 42.24%-58.56% in the water and sediment, respectively. The color of microplastics was mainly transparent, which occupied 46.43%-61.51% and 40.41%-57.44% in the water and sediment, respectively. The largest particle size of microplastics was<0.5 mm, accounting for 46.43%-61.51% and 43.27%-54.79% in the water and sediment microplastics, respectively. It was concluded that polyethylene was the most common type (43%), followed by polystyrene (34%) and polypropylene (16%) using Fourier infrared spectroscopy. It was estimated that the main drainage channel in the Hetao irrigation district could transport 116.06 kg of microplastics into Lake Ulansuhai every day, and a serious microplastic pollution effect was generated due to the accumulation of microplastics in Lake Wulangsuhai. This study can provide reference for the pollution of microplastics in Hetao irrigation district of Inner Mongolia.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Microplastic Controlled terms:Drainage - Infrared spectroscopy - Irrigation - Lakes - Particle size - Pollution - Polypropylenes - Suspended sediments - Suspensions (fluids) Uncontrolled terms:Abundance distribution - Chemical compositions - Density separation - Drainage channels - Hetao irrigation districts - Pollution effects - Quality estimation - Suspension methods Classification code:483 Soil Mechanics and Foundations - 804 Chemical Products Generally - 815.1.1 Organic Polymers - 821.3 Agricultural Methods Numerical data indexing:Mass 1.16e+02kg, Percentage 1.60e+01%, Percentage 3.40e+01%, Percentage 3.50e+01% to 7.04e+01%, Percentage 4.04e+01% to 5.74e+01%, Percentage 4.22e+01% to 5.86e+01%, Percentage 4.30e+01%, Percentage 4.33e+01% to 5.48e+01%, Percentage 4.64e+01% to 6.15e+01% DOI:10.13227/j.hjkx.202003259 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008873 Title:Method for High-resolution Emission Inventory for Road Vehicles in Chengdu Based on Traffic Flow Monitoring Data Title of translation:基于交通流的成都市高分辨率机动车排放清单建立 Authors:Pan, Yu-Jin (1, 2); Li, Yuan (1, 2); Chen, Jun-Hui (1, 2); Shi, Jia-Cheng (1, 2); Tian, Hong (3); Zhang, Ji (3); Zhou, Jing (3); Chen, Xia (3); Liu, Zheng (1); Qian, Jun (1) Author affiliation:(1) Sichuan Research Institute of Environment Protection, Chengdu; 610041, China; (2) Sichuan Environmental Protection Research Laboratory of Moving Source Pollution Control, Chengdu; 610041, China; (3) Chengdu Technology Center of Vehicle Exhaust Pollution, Chengdu; 610041, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3581-3590 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A method for developing a high-resolution emission inventory for road vehicles based on traffic flow monitoring data is proposed in this study. The characteristics of road traffic flow were analyzed and a high-resolution emission inventory of vehicle in Chengdu was established. The results showed that the traffic flow and emissions in Chengdu exhibited an obvious "double peak" distribution, and that the traffic volume of vehicles during peak hours accounted for 39.85% of the total. China IV vehicles, small vehicles, and gasoline vehicles were the main types of road vehicles classified. The daily emissions of SO2, NOx, CO, PM10, PM2.5, BC, OC, and VOCs from road vehicles were 3.89, 162.08, 324.11, 4.79, 4.36, 1.89, 0.78, and 44.37 t, respectively. The overall spatial distribution showed a decreasing trend from the city center to the periphery, and the time distribution essentially presented a "double peak" distribution. The related indicators of particulate matter were greatly affected by the number of trucks. The main source of NOx, PM10, PM2.5, BC, and OC was large diesel vehicles, and the main source of CO was small gasoline vehicles. NOx emissions from large vehicles accounted for up to 80% of the total. The method based on registered vehicles led to an overestimation of the emissions from road vehicles in Chengdu, with a proportion between 1% and 30%.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Road vehicles Controlled terms:Gasoline - Monitoring - Nitrogen oxides - Roads and streets Uncontrolled terms:Diesel vehicles - Gasoline vehicle - High-resolution emission - Particulate Matter - Registered vehicles - Road traffic flows - Time distribution - Traffic volumes Classification code:406.2 Roads and Streets - 523 Liquid Fuels - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.00e+00% to 3.00e+01%, Percentage 3.99e+01%, Percentage 8.00e+01% DOI:10.13227/j.hjkx.202002082 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008852 Title:Acid Mine Wasteland Reclamation by Juncus ochraceus Buchen as a Potential Pioneer Plant Title of translation:羽序灯心草作为酸性矿山废弃地先锋植物潜力 Authors:Huang, Jian-Hong (1); Fu, Jiang-Li (1); Yan, Xin-Rui (1); Yin, Feng (1); Tian, Sen-Lin (1); Ning, Ping (1); Li, Ying-Jie (1) Author affiliation:(1) Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming; 650500, China Corresponding author:Tian, Sen-Lin(tiansenlin@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3829-3835 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ecological reclamation is the major method for the revegetation of acid mine wasteland worldwide. In this study the pH, fertility characteristics, and heavy metal content of soils from Laili Mountain mine wasteland were analyzed. The research also studied the morphological characteristics and the heavy metal in Juncus ochraceus Buchen as well as its resistance to acid, adaptability to soil fertility in abandoned land, and tolerance to heavy metal pollution (e. g., Zn and Cu) to determine its remediation potential as a pioneer plant for acid mine wasteland. Results showed that the pH of soils in the study area were acidic, ranging from 3.46 to 4.01. The contents of organic matter, total potassium, total phosphorus, and available phosphorus was poor, being 10.28-25.75 g•kg^-1, 8.84-9.32 g•kg^-1, 0.56-0.63 g•kg^-1, and 1.82-5.72 mg•kg^-1 respectively. The contents of Zn, Cu, and Fe in the soil ranged between 54.93 and 114.49 mg•kg^-1, 92.53 and 127.59 mg•kg^-1, and 47 133.60 and 112 259.63 mg•kg^-1, whereby the Cu content was 1.85-2.55 times higher than the risk screening value. The height of Juncus ochraceus Buchen in the study area ranged from 43.77 cm to 55.42 cm, which was shorter than the average plant height of the control group (51.38-57.66 cm); however, this was not a significant difference, thus indicating that this plant was resistant to acidic soil and heavy metal pollution. Further analysis showed that Juncus ochraceus Buchen had accumulating capacity for both Cu and Zn, and transferring capacity for Zn as well. Thus, it had potential in heavy metal accumulation and absorption. Plant height was significantly related to the available phosphorus content in the rhizosphere soil. In the future, soil fertility could be improved by supplementing fertilizers containing available phosphorus when Juncus ochraceus Buchen is planted on the land of abandoned mines as a pioneer plant. Comprehensive analysis revealed that Juncus ochraceus Buchen had great potential as a pioneer plant to remediate acid mine wasteland.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Abandoned mines Controlled terms:Acid resistance - Bioaccumulation - Fertilizers - Heavy metals - Phosphorus - Remediation - Revegetation - Soil conservation - Soil pollution control - Soils Uncontrolled terms:Available phosphorus - Comprehensive analysis - Heavy metal accumulation - Heavy metal contents - Heavy metal pollution - Morphological characteristic - Rhizosphere soils - Wasteland reclamation Classification code:442.2 Land Reclamation - 454.2 Environmental Impact and Protection - 461.9 Biology - 483.1 Soils and Soil Mechanics - 502.1 Mine and Quarry Operations - 531 Metallurgy and Metallography - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Size 4.38e-01m to 5.54e-01m, Size 5.14e-01m to 5.77e-01m DOI:10.13227/j.hjkx.202001129 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008847 Title:Dynamic Process of Nitrogen and Phosphorus Export and Loss Load in an Intensive Orchard with Ridge and Furrow Plantation in the Three Gorges Reservoir Area Title of translation:三峡库区规模化顺坡沟垄果园氮, 磷输出过程及流失负荷 Authors:Yan, Kun (1, 2); Wang, Yu-Kuan (1, 3); Liu, Qin (1, 3, 4); Xu, Pei (1, 3); Yan, Yang-Yang (1, 3) Author affiliation:(1) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Wanzhou Key Regional Soil and Water Conservation Monitoring Station of Three Gorges Project Operation and Maintenance System, Wanzhou; 404020, China; (4) Earth Sciences Faculty, Chengdu University of Technology, Chengdu; 610059, China Corresponding author:Wang, Yu-Kuan(wangyukuan@imde.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3646-3656 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To comprehend the runoff load of nitrogen (N) and phosphorus (P) and the impact on the receiving river in an agricultural area with an intensive orchard plantation and a longitudinal ridge and furrow morphology in the Three Gorges Reservoir Area, the runoff and N and P concentrations were dynamically monitored in a typical citrus orchard catchment in Wanzhou Country, Chongqing, China. The results showed that the nutrient concentration in runoff water from the intensive citrus planting catchment was very high. The average annual event mean concentrations (EMC) were 9.31 mg•L^-1 for total nitrogen (TN), 8.11 mg•L^-1 for dissolved nitrogen (DN), 5.66 mg•L^-1 for nitrate nitrogen (NN), 0.51 mg•L^-1 for ammonium nitrogen (AN), 0.87 mg•L^-1 for total phosphorus, 0.56 mg•L^-1 for solved phosphorus (DP), and 0.32 mg•L^-1 for particulate phosphorus (DP). In addition, the annual loss loads were 13.43, 12.20, 8.77, 0.75, 1.26, 0.84, and 0.42 kg•(hm²•a)^-1 for TN, DN, NN, AN, TP, DP, and PP, respectively. The annual average concentrations of TN and TP were 8.49 mg•L^-1 and 0.87 mg•L^-1, respectively, which exceeded the category V values of the surface water quality standards (GB3838-2002) by 4.25 times and 2.2 times, respectively, and also exceeded the internationally recognized thresholds for the eutrophication of waterbodies. The TN and TP loss load from storm runoff was one of the main reasons for the degradation of the river water quality, thus suggesting the need to treat surface runoff and control runoff nutrient losses, especially during the first storm events after fertilization. During two typical long-duration springtime rainfall events after fertilization, the loads of nitrate nitrogen (NN) and dissolved phosphorus (DP) were 4.94 kg•hm^-2 and 0.28 kg•hm^-2, respectively, which accounted for 92.90% and 64.69% of the total annual TN and TP loss loads, respectively. The loads of NN and DP in a short-duration high-intensity rainfall event were 0.52 and 0.05 kg•hm^-2 respectively, which accounted for 65.92% and 74.88% of the total annual TN and TP loss loads, respectively. The DN and DP were the main forms of nitrogen and phosphorus losses from the intensive citrus orchard with a longitudinal ridge and furrow morphology. Meanwhile, the catchment showed a significant first-flush phenomenon during a typical rainfall event, with a total of 58.0%, 57.0%, 58.5%, 79.0%, 62.0%, 63.5%, and 60.0% of the mass of TN, DN, NN, AN, TP, DP, and PP in the initial 20% of the runoff, respectively. Hence, controlling the surface runoff at the early runoff stage plays an important role in reducing nutrient losses.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Agricultural runoff Controlled terms:Agricultural robots - Catchments - Eutrophication - Morphology - Nitrates - Nitrogen - Nutrients - Orchards - Phosphorus - Quality control - Rain - Reservoirs (water) - River pollution - Storms - Water pollution control - Water quality Uncontrolled terms:Annual average concentration - Event mean concentrations - High intensity rainfall - Nitrogen and phosphorus - Nitrogen and phosphorus loss - Nutrient concentrations - Particulate phosphorus - Three gorges reservoir area Classification code:441.2 Reservoirs - 443.3 Precipitation - 445.2 Water Analysis - 453 Water Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.3 Agricultural Methods - 821.5 Agricultural Wastes - 913.3 Quality Assurance and Control - 951 Materials Science Numerical data indexing:Mass_Density 3.20e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 5.10e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 5.60e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 5.66e-03kg/m3 to 2.20e-02kg/m3, Percentage 6.47e+01%, Percentage 6.59e+01%, Percentage 7.49e+01%, Percentage 7.90e+01%, Mass_Density 8.11e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 8.49e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 8.70e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 9.31e-03kg/m3 to 2.20e-02kg/m3, Percentage 2.00e+01%, Percentage 5.70e+01%, Percentage 5.80e+01%, Percentage 5.85e+01%, Percentage 6.00e+01%, Percentage 6.20e+01%, Percentage 6.35e+01%, Percentage 9.29e+01% DOI:10.13227/j.hjkx.202002075 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796377 Title:Root Activities of Re-Vegetated Plant Species Regulate Soil Nutrients and Bacterial Diversity in the Riparian Zone of the Three Gorges Reservoir Title of translation:三峡消落带适生植物根系活动调控土壤养分与细菌群落多样性特征 Authors:Li, Li-Juan (1); Li, Chang-Xiao (1); Chen, Chun-Hua (1); Yang, Zhi-Hua (1); Chen, Xue-Mei (1) Author affiliation:(1) Key Laboratory of Eco-environment in the Three Gorges Reservoir of the Ministry of Education, School of Life Sciences, Southwest University, Chongqing; 400715, China Corresponding author:Li, Chang-Xiao(lichangx@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2898-2907 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Plants modify the soil microenvironment through root exudation. It is important to study the dynamic changes of soil ecosystem from the perspective of root-soil-microbe interactions after vegetation restoration in the riparian zone of the Three Gorges Reservoir (TGR). The rhizosphere and bulk soils of Cynodon dactylon, Hemarthria altissima, Taxodium distichum, and Salix matsudana were collected from the vegetation restoration demonstration base of Ruxi River to explore the differences in nutrient contents and enzyme activities between the rhizosphere and bulk soils. At the same time, the diversity of the bacterial community in the rhizosphere and bulk soils was also investigated using the high throughput sequencing method, with the aim to clarify the growth adaptabilities and nutritional utilization strategies within a more precise rhizosphere range. The results showed that ① Suitable plants enhanced the transformation efficiency of rhizosphere nutrients in different ways to improve their adaptability to the soil environment in the TGR. Compared with bulk soil, root activities had significant effects on nutrient contents in the rhizosphere. Among them, SOC, AN, TN, and AP were enriched significantly to a certain degree, while the changes of potassium were not consistent in different plant species. ② In the process of vegetation restoration, the deposition of litter and root secretion indirectly regulated soil enzyme activity. Invertase, urease, and acid phosphatase, all exhibited positive rhizosphere effects (R/S>1) in these four suitable plant species. However, considering the differences in root structure and physiological characteristics between herbaceous and woody plants, the rhizosphere effect of these three enzymes in four plants was different. ③ The results of high-throughput sequencing showed that there was no significant difference in bacterial community diversity between the rhizosphere and bulk soil of four suitable plant species in the TGR. In addition, Proteobacteria, Acidobacteria, Chloroflexi, Actinobacteria, Bacteroidetes, Planctomycetes, Cyanobacteria, Firmicutes, Nitrospirae, Gemmatimonadetes, WS3, and Crenarchaeota were the twelve most abundant bacterial phyla in the rhizosphere and bulk soils, serving the ecological functions of nutrition absorption and disease suppression. Their colonization was found to be beneficial to the stress resistance of plants growing in harsh riparian ecosystems in the TGR.
© 2020, Science Press. All right reserved. Number of references:63 Main heading:Soils Controlled terms:Bacteria - Ecosystems - Electric grounding - Enzyme activity - Nutrients - Nutrition - Phosphatases - Restoration - Vegetation Uncontrolled terms:Ecological functions - High-throughput sequencing - Physiological characteristics - Soil enzyme activity - Three gorges reservoir - Transformation efficiency - Utilization strategy - Vegetation restoration Classification code:454.3 Ecology and Ecosystems - 461.7 Health Care - 461.9 Biology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201911214 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517612 Title:Vertical Distribution of Surface Formaldehyde in the Pearl River Delta Urban Area Based on Observations at the Canton Tower Title of translation:基于广州塔观测的城市近地面甲醛垂直分布特征 Authors:Huang, Shan (1); Pei, Cheng-Lei (2); Zhang, Ying (3); Song, Qi-Cong (1); Qi, Ji-Peng (1); Zhao, Yi-Ming (1); Wang, Ming (4); Shao, Min (1) Author affiliation:(1) Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Institute for Environmental and Climate Research, Jinan University, Guangzhou; 511443, China; (2) Guangzhou Environmental Monitoring Center, Guangzhou; 510030, China; (3) State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (4) Jiangsu Atmospheric Environment and Equipment Technology Collaborative Innovation Center, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing; 210044, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5362-5370 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the vertical distribution of atmospheric formaldehyde in the Pearl River Delta (PRD) urban area, simultaneous measurements were performed at three heights on Canton Tower for the first time. Carbonyls including formaldehyde were sampled with 2,4-dinitrophenylhydrazin (DNPH) at noon for 32 days in autumn of 2018, and then analyzed using high-performance liquid chromatography (HPLC). Average mass concentrations of formaldehyde at ground level, 118 m, and 488 m sites at Canton Tower were (5.10±1.93), (6.61±2.84), and (5.33±2.55) μg•m^-3, respectively. The measured formaldehyde was positively correlated with atmospheric oxidant Ox at the three sites (R 0.65-0.75), indicating that photochemical formation is an important source for urban formaldehyde in PRD. Three different profiles were found for formaldehyde vertical distribution during the measurements. The most frequently observed one showed a higher value at 118 m while lower ones at ground level and 488 m, occurring when the boundary layer is in moderate convection state with high photochemical reactivity. The 118 m layer may be also influenced by transported high-chimney emissions from industries in suburban areas. Vertical columns of formaldehyde were also calculated according to its vertical profile. The average value was (11.23±4.80)×10¹⁵ molecules•cm^-2, 19% lower than that from satellite retrieval, while in the same magnitude as values reported in reference papers.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Urban growth Controlled terms:Boundary layers - Formaldehyde - High performance liquid chromatography - Photochemical forming Uncontrolled terms:Atmospheric formaldehyde - Atmospheric oxidants - Mass concentration - Pearl River delta - Photochemical reactivity - Satellite retrieval - Simultaneous measurement - Vertical distributions Classification code:403.1 Urban Planning and Development - 804.1 Organic Compounds Numerical data indexing:Age 8.77e-02yr, Percentage 1.90e+01%, Size 1.18e+02m, Size 4.88e+02m DOI:10.13227/j.hjkx.202004143 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952753 Title:Enhanced Membrane Anti-fouling Ability of Anaerobic Membrane Bioreactor Equipped with Bio-electrochemical System Using Nano-zero-valent Iron and Its Regulation Mechanism Title of translation:纳米零价铁强化微生物电催化-厌氧膜生物组合反应器抗膜污染能力及其调控机制 Authors:Pan, Yang (1); Niu, Cheng-Xin (1); Zhi, Zhong-Xiang (1); Wang, Jian-Hui (1); Lu, Xue-Qin (1, 2); Dai, Jin-Jin (1); Zhen, Guang-Yin (1, 3, 4); Sun, Tong-Tong (1); Kang, Na-Ying (1) 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) Institute of Eco-Chongming, Shanghai; 200062, China; (3) Shanghai Institute of Pollution Control and Ecological Security, Shanghai; 200092, China; (4) Technology Innovation Center for Land Spatial Eco-restoration in Metropolitan Area, Ministry of Natural Resources, Shanghai; 200062, China Corresponding author:Zhen, Guang-Yin(gyzhen@des.ecnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5073-5081 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Membrane fouling is the biggest challenge of membrane bioreactor industrialization. In this study, a bio-electrochemical system (BES)-anaerobic membrane bioreactor (AnMBR) system was constructed, and the effect of nano-zero-valent iron (nZVI) on membrane anti-fouling ability and methane production was investigated. The results showed that the BES-AnMBR system was stable and the chemical oxygen demand (COD) removal rate was maintained at approximately 95%. The optimum condition was observed to be nZVI 0.1 g•g^-1(VS). Under this condition, transmembrane pressure (TMP) was reduced by 28.1%, the membrane flux had a slight improvement, and methane production was up to 81.3 mL•g^-1(CODremoved). This was 12.1% higher than that of the control. In addition, a further analysis of extracellular polymeric substances (EPS) fraction and membrane resistance showed that nZVI enhanced EPS decomposition, promoted the formation of an iron-rich layer of inorganic and organic matters on the membrane surface, and changed the distribution of organics and inorganics, thereby significantly alleviating membrane fouling. This study will enrich basic theory of conventional AnMBR and provide a new solution for efficient sludge treatment and resource utilization.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Membranes Controlled terms:Bioconversion - Bioreactors - Chemical oxygen demand - Iron - Membrane fouling - Methane Uncontrolled terms:Anaerobic membrane bioreactor - Bio electrochemical systems - Chemical oxygen demand removals - Extracellular polymeric substances - Nano zero-valent irons - Regulation mechanisms - Resource utilizations - Transmembrane pressures Classification code:461.8 Biotechnology - 545.1 Iron - 801.2 Biochemistry - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 1.21e+01%, Percentage 2.81e+01%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202003164 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952752 Title:Investigating Adsorption of Naphthalene to Organo-Modified Montmorillonites and Influencing Factors Title of translation:有机改性蒙脱土对萘的吸附机制和影响因子 Authors:Hou, Jing-Wen (1, 2); Shi, Wei-Lin (1); Gao, Juan (2) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210018, China Corresponding author:Shi, Wei-Lin(weilin-shi@163.comemailjuangao@issas.ac.cn)Gao, Juan(juangao@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5133-5142 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:There are many sites contaminated by polycyclic aromatic hydrocarbons (PAHs) or combined PAHs-heavy metal in China, which pose serious health-risks to local people and environments. Dissipative quartz crystal microbalance (QCM-D) was applied to investigate the adsorption of naphthalene to two organic-modified smectite clays (cetyltrimethyl ammonium bromide modified montmorillonite, CTAB-SMF, and 3-mercapto propyl trimethoxy silane modified montmorillonite, TMSP-SMF) and original SMF, together with batch adsorption experiments. The results, based on in-situ online QCM-D experiments, showed that the adsorption sites of CTAB-SMF on naphthalene were mainly CTAB grouped between the interlayers of clay particles, while TMSP-SMF's were TMSP grouped on the surfaces of clay particles. The isotherms of naphthalene adsorption to CTAB-SMF fitted well (R²>0.92) with the Freundlich model, while the adsorption isotherms to TMSP-SMF and SMF fitted well with the Langmuir model (R²>0.96). The parameters of CTAB-SMF (n>1) indicated that the adsorption sites of naphthalene to CTAB-SMF were heterogeneous and the adsorption increases at higher equilibrium concentration. The adsorption capacity qmax of TMSP-SMF is significantly greater than that of SMF (P<0.05). Based on the calculation, the value of ΔHobs for these three clays (CTAB-SMF, TMSP-SMF, and SMF) were within the range of -30 to -10 kJ•mol^-1, which indicated that it was a spontaneous exothermic physical process. The solution ionic strength could decrease the adsorption of naphthalene to SMF, but had limited effects on naphthalene adsorption to the two organo-modified clay particles. The existence of Cu²⁺ in the solution could enhance naphthalene adsorption to the three particles, and naphthalene could improve Cu²⁺ adsorption to these two modified clays. The results of this study show that QCM-D is a useful technique to indicate the changes of clay film during the process of adsorption, and the two organo-modified clay particles have the potential to be remediation materials to remediate PAHs or PAHs-heavy metal-contaminated sites.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Naphthalene Controlled terms:Adsorption - Clay minerals - Contamination - Health risks - Heavy metals - Ionic strength - Polycyclic aromatic hydrocarbons - Quartz crystal microbalances - Remediation Uncontrolled terms:Batch adsorption experiments - Cetyl trimethyl ammonium bromides - Equilibrium concentration - Heavy metal contaminated site - Modified montmorillonite - Naphthalene adsorption - Organo-modified montmorillonites - Polycyclic aromatic hydrocarbons (PAHS) Classification code:454.2 Environmental Impact and Protection - 461.7 Health Care - 482.2 Minerals - 531 Metallurgy and Metallography - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 943.3 Special Purpose Instruments DOI:10.13227/j.hjkx.202003269 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608862026 Title:Effect of Mn-Modified Biochar on the Characteristics of Aggregate Structure and the Content of Cd in Weakly Alkaline Cd-Contaminated Soil Title of translation:锰基改性生物炭对弱碱性Cd污染土壤团聚体结构以及Cd含量特征的影响 Authors:Sun, Tong (1, 2); Fu, Yu-Tong (1, 2); Li, Ke (1); Xu, Ying-Ming (1); Sun, Yue-Bing (1) Author affiliation:(1) Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (2) College of Resources and Environment, Northeast Agricultural University, Harbin; 150030, China Corresponding author:Sun, Yue-Bing(sunyuebing@aepi.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3426-3433 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Field experiments were conducted to investigate the effects of Mn-based modified rice husk biochar on soil organic carbon, aggregate structure, mass load, and the content of available Cd in aggregates. The results showed that the concentration of soil organic carbon increased gradually with additional modified biochar, resulting in a 3.2%-32% increase compared with the CK. Modified biochar improved the composition structure and stability of soil aggregates, and increased the amount of large aggregates (5-8 mm and 2-5 mm), while micro-aggregate production was inhibited (≤0.25 mm). Compared with the CK, mean weight diameter (MWD), geometrical mean weight (GMD), and soil aggregate structural body (R0.25) of the soil aggregates increased by 15.1%-20.3%, 8.1%-22.4%, and 0.43%-7.6%, respectively. Cd was preferentially enriched on small aggregates, and the mass loading of Cd in soil aggregates increased gradually with decreasing particle size. The distribution factor of Cd showed significant enrichment in the 0.5-1 mm and 0.25-0.5 mm grain sizes, whereas it showed a clear loss in particle sizes of 5-8 mm and 2-5 mm. The addition of modified biochar reduced the content of DTPA-Cd in soil aggregates, causing 7.6%-15.1%, 15.6%-24.3%, 3.6%-13.8%, and 11.6%-13.7% reductions in 5-8, 2-5, 0.5-1.0, and 0.25-0.5 mm particle sizes, respectively. In general, modified biochar not only has a favorable optimizing function on the structure of soil aggregates, but also decreases the content of available Cd in different sizes of soil aggregates, increasing its significance in the remediation of Cd-contaminated soil.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Soil pollution Controlled terms:Aggregates - Grain size and shape - Organic carbon - Particle size - Remediation - Soils Uncontrolled terms:Aggregate structures - Cd-contaminated soils - Composition structure - Distribution factor - Mean weight diameter - Optimizing functions - Soil organic carbon - Structure of soils Classification code:406 Highway Engineering - 454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds Numerical data indexing:Percentage 1.16e+01% to 1.37e+01%, Percentage 1.51e+01% to 2.03e+01%, Percentage 3.20e+00% to 3.20e+01%, Percentage 4.30e-01% to 7.60e+00%, Percentage 7.60e+00% to 1.51e+01%, Size 2.00e-03m to 5.00e-03m, Size 2.50e-04m to 5.00e-04m, Size 5.00e-03m to 8.00e-03m, Size 5.00e-04m to 1.00e-03m DOI:10.13227/j.hjkx.202001065 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861986 Title:Source Identification and Pollution Characteristics of Heavy Metals in Suspended Particles of Urban Road Dust from Xingtai City Title of translation:邢台市区道路可悬浮灰尘重金属污染特征及来源识别 Authors:Song, Yi (1); Lu, Xin-Wei (1); Zhou, Xiao (1); Ge, Zi-He (1) Author affiliation:(1) School of Geography and Tourism, Shaanxi Normal University, Xi'an; 710119, China Corresponding author:Lu, Xin-Wei(luxinwei@snnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3130-3135 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fifty dust samples were collected from Xingtai City to study the source characteristics of heavy metals in suspended particles of urban road dust from industrial enterprise transformation cities. The contents of Cr, Mn, Co, Ni, Cu, Zn, As, and Pb in particles of urban road dust smaller than 100 μm were determined by X-ray fluorescence spectrometry, and their pollution levels were assessed by enrichment factor. The possible sources of heavy metals measured in the dust were identified by multivariate statistical analysis methods including correlation analysis, principal component analysis, and cluster analysis. The results indicated that in comparison to the element background values of local soil, the particles of urban road dust smaller than 100 μm from Xingtai City had higher Cr, Mn, Co, Cu, Zn, and Pb concentrations. The accumulation level of Co was the highest, followed by Zn, and Pb and Cu, whereas the other trace metals were deficient or showed minimal enrichment in the suspended road dust. The multivariate statistical analysis results showed that Cr, Mn, and Ni had significant positive correlation. These metals belong to both a principal component and a cluster, whereas Cu, Zn, and Pb belong to just a principal component. Considering the content characteristics and the results of multivariate statistical analysis of various heavy metal elements in the suspended samples, these results illustrated that the Cr, Mn, and Ni in the suspended particles of urban dust from Xingtai City roads mainly come from natural and industrial sources, whereas the Zn, Pb, and Cu originate from transportation and coal sources; As comes from natural sources, and Co is mainly affected by industrial activities.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Urban transportation Controlled terms:Air pollution - Cluster analysis - Coal dust - Coal transportation - Correlation methods - Electron emission - Fluorescence spectroscopy - Heavy metals - Metal analysis - Multivariant analysis - Roads and streets - Trace elements Uncontrolled terms:Heavy metal elements - Industrial activities - Industrial enterprise - Multivariate statistical analysis - Positive correlations - Source characteristics - Source identification - X ray fluorescence spectrometry Classification code:406.2 Roads and Streets - 432 Highway Transportation - 433 Railroad Transportation - 451 Air Pollution - 503 Mines and Mining, Coal - 524 Solid Fuels - 531 Metallurgy and Metallography - 723 Computer Software, Data Handling and Applications - 741.3 Optical Devices and Systems - 922 Statistical Methods - 922.2 Mathematical Statistics Numerical data indexing:Size 1.00e-04m DOI:10.13227/j.hjkx.201912153 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861887 Title:Microbial Diversity of Filamentous Sludge Bulking at Low Temperature Title of translation:低温下丝状菌膨胀污泥的微生物多样性 Authors:Gao, Chun-Di (1); Zhang, Na (1); Han, Hui (1); Ren, Hao (1); Li, Yue (1); Hou, Chun-Yan (1); Wang, Chuan-De (1); Peng, Yong-Zhen (1) Author affiliation:(1) National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3373-3383 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the characteristics of microbial diversity during filamentous bulking at low temperature, the induction of sludge bulking was successfully carried out using a low-temperature sequencing batch reactor(SBR). With the help of Illumina MiSeq high-throughput sequencing technology, the overall changes in the microbial community structure of activated sludge, the characteristics of each specific microbial community, and the specific genera were all investigated under different sludge sedimentation performances. The results showed that filamentous bulking can be successfully induced after the system operating temperature drops to (14±1)℃, and the COD and TN removal rates can still be maintained at approximately 90% and 86%, respectively, with the sludge volume index deteriorating to 663.99 mL•g^-1. The occurrence of sludge bulking at low temperature will not only reduce the overall diversity and uniformity of microorganisms in the system and increase the abundance of filamentous bacteria from 0.49% to 26.04% but also cause the abundance of denitrifying bacteria to reduce from 21.04% to 13.99% and that of dephosphorization bacteria to reduce from 4.25% to 1.93%. Of the five filamentous genera founded, the abundances of three filamentous bacteria represented by Thiothrix increased, whereas only that of the Haliscomenobacter decreased. Of the 19 denitrifier genera founded, the abundances of five species represented by Nitrosomonas increased, whereas those of seven species represented by Nitrospira decreased. Moreover, the abundances of Pseudomonas and Tetrasphaera increased out of the eight phosphorus-removing bacteria genera, whereas the abundances of the five bacteria genera represented by Candidatus_Competibacter decreased. Although sludge bulking has a significant impact on the structure of the microbial community, the 477 operational taxonomic units and 227 bacterial species that are always present in the different sludge samples indicate that the main microorganisms in the reactor are still relatively stable during the bulking process.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Bacteria Controlled terms:Activated sludge process - Batch reactors - Denitrification - Sewage sludge - Temperature Uncontrolled terms:Denitrifying bacteria - Filamentous bacteria - High-throughput sequencing - Microbial communities - Microbial community structures - Operating temperature - Operational taxonomic units - Sequencing batch reactors Classification code:452.2 Sewage Treatment - 641.1 Thermodynamics - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions Numerical data indexing:Percentage 2.10e+01% to 1.40e+01%, Percentage 4.25e+00% to 1.93e+00%, Percentage 4.90e-01% to 2.60e+01%, Percentage 8.60e+01%, Percentage 9.00e+01%, Specific_Volume 6.64e-01m3/kg to 2.20e-02m3/kg DOI:10.13227/j.hjkx.201912048 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371188 Title:Degradation of AO7 with Magnetic Fe3O4-CuO Heterogeneous Catalyzed Sodium Percarbonate System Title of translation:磁性Fe3O4-CuO非均相活化过碳酸钠降解AO7 Authors:Xu, Jie (1); Wang, Lin (2); Chen, Jia-Bin (3); Xu, Fen (1); Wang, Ke-Qing (1); Hou, Zi-Feng (1); Huang, Tian-Yin (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Kunshan Architectural Design Co., Ltd., Kunshan; 215300, China; (3) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China Corresponding author:Huang, Tian-Yin(huangtianyin111@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1734-1742 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Magnetically recyclable Fe3O4-CuO was synthesized by a one-step hydrothermal method and characterized by scanning electron microscopy coupled with energy dispersive spectrometer (SEM-EDS) and X-ray diffraction (XRD). The degradation of azo dye acid orange 7 (AO7) by percarbonate (SPC) activated with Fe3O4-CuO was studied. The effects of Fe3O4-CuO catalyst loading, SPC concentration, pH value, and common chloride ions on AO7 degradation in the Fe3O4-CuO/SPC system were evaluated. The main reaction mechanism of AO7 degradation was analyzed. The results show that Fe3O4-CuO could effectively activate SPC to degrade AO7 and the reaction was accelerated with the increase of Fe3O4-CuO dosage. The increase of SPC dosage was favorable for the degradation of AO7, but excessive SPC dosage inhibited the degradation of AO7. Common ions (e.g., Cl^-) in dye wastewater could promote the degradation of AO7, and the degradation rate increased with increasing concentration of Cl^-. The reaction mainly occurred on the surface of the catalyst, and •OH was identified as the main active species for the degradation of AO7. The catalyst Fe3O4-CuO showed excellent stability owing to the high catalytic activity remaining after 4 cycles of repeated use. The Fe3O4-CuO/SPC system achieved a high mineralization rate in the process of decolorization of AO7.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Copper oxides Controlled terms:Azo dyes - Catalyst activity - Chlorine compounds - Citrus fruits - Degradation - Iron oxides - Magnetic materials - Magnetite - Scanning electron microscopy - Sodium compounds - Spectrometers Uncontrolled terms:Acid orange 7 - Azo-dye acid orange 7 - Energy dispersive spectrometers - Fe3O4-CuO - Hydrothermal methods - Hydroxyl radicals - Reaction mechanism - Sodium percarbonate Classification code:708.4 Magnetic Materials - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.4 Agricultural Products DOI:10.13227/j.hjkx.201908117 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990476 Title:Occurrence, Distribution, Source, and Health Risk Assessment of Polybrominated Diphenyl Ethers in Surface Soil from the Shen-Fu Region, Northeast China Title of translation:中国东北沈抚地区土壤中PBDEs的残留, 来源及风险评价 Authors:Xiang, Xin-Xin (1, 2); Lu, Yin-Tao (1, 2); Ruan, Qi-Yang (1, 2); Lai, Cai (1, 2); Sun, Shao-Bin (1, 2); Yao, Hong (1, 2); Zhang, Zhan-Sheng (3) Author affiliation:(1) School of Civil Engineering, Beijing Jiaotong University, Beijing; 100044, China; (2) Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing; 100044, China; (3) Chinese Academy of Environmental Planning, Beijing; 100012, China Corresponding author:Zhang, Zhan-Sheng(zhangzs@caep.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:368-376 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Shen-Fu region is an important urban area in northeast China. We report on a study of the distribution of polybrominated diphenyl ethers (PBDEs) in representative topsoil from this region. In the summer of 2016, 72 soil samples from three cities (Shenyang, Fushun, and Shen-Fu New City) were collected, which covered four land use types: urban, rural residential, cultivated, and woodland. We report on the concentrations, compositions, and distributions of 14 PBDEs in soil and explore their sources, and additionally undertake human exposure analysis and health risk assessments. The results showed that the concentration of ∑14PBDEs in the topsoil ranged from 0.279-50.719 ng•g^-1(dry weight), with a mean of (10.466±9.246) ng•g^-1. The concentrations of PBDEs was ranked for the cities as: Fushun>Shenyang>Shen-Fu New City>background, and for different land use types as: urban land>rural residential land>cultivated land>forest. Deca-PBDE had the highest proportion of all congeners, accounting for 81.25%-89.23% of all PBDEs. Source analysis indicated that commercial Deca-PBDE was the main source, contributing 66.06% of the total Deca-PBDE according to principal component analysis/multiple linear regression (PCA-MLR). Among five different age groups assessed for exposure, children in Fushun had the highest exposure dose: (20.98±25.01) ng•(kg•d)^-1. In terms of different land types, the highest exposure dose was for children living in urban areas: (18.54±20.27) ng•(kg•d)^-1. The non-oncogenic health risks in the Shen-Fu region are of a relatively low level.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Risk assessment Controlled terms:Ethers - Health - Health risks - Housing - Land use - Organic pollutants - Rural areas - Soils Uncontrolled terms:Cultivated lands - Different land use types - Exposure dose - Human exposures - Northeast China - Polybrominated diphenyl ether (PBDEs) - Rural residential - Source analysis Classification code:403 Urban and Regional Planning and Development - 403.1 Urban Planning and Development - 461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 6.61e+01%, Percentage 8.12e+01% to 8.92e+01% DOI:10.13227/j.hjkx.201907228 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990488 Title:Secondary Organic Aerosol Mass Yield and Characteristics from 4-ethylguaiacol Aqueous•OH Oxidation: Effects of Initial Concentration Title of translation:四乙基愈创木酚液相•OH氧化SOA产率及特征分析:初始浓度的影响 Authors:Zhuang, Yu (1); Chen, Yan-Tong (1); Li, Xu-Dong (1); Ma, Shuai-Shuai (1); Zhao, Zhu-Zi (1); Ye, Zhao-Lian (1); Gai, Xin-Lei (2) Author affiliation:(1) School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou; 213001, China; (2) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Ye, Zhao-Lian(bess_ye@jsut.edu.cnemailcaxinra@163.com)Gai, Xin-Lei(caxinra@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:146-154 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Aqueous-phase chemical processing, as an essential formation pathway of secondary organic aerosol (SOA), has attracted widespread attention from within atmospheric chemistry fields. Due to the complicated reaction nature, reaction mechanisms, and product characteristics of aqueous-phase chemical processing, its contribution to the SOA budget is still not fully understood. In this work, we investigate how the initial concentration (0.03-3 mmol•L^-1) of 4-ethylguaiacol affects SOA formation of aqueous•OH photochemical oxidation. We use soot-particle aerosol mass spectrometry (SP-AMS) to monitor SOA mass yield and oxidation character, and gas chromatography-mass spectrometry (GC-MS) and ion chromatography (IC) to measure products and organic acids. Additionally, we use ultraviolet visible spectroscopy (UV-vis) and high-performance liquid spectrometry (HPLS) to track the formation of light-absorbing products such as humic-like substances (HULIS). Our research indicated that the range of the O/C ratio of EG-aqSOA measured by the SP-AMS exhibited increasing trends with increased reaction time 0.42-0.61 (0.03 mmol•L^-1), 0.49-0.84 (0.3 mmol•L^-1), and 0.49-0.63 (3 mmol•L^-1). Dimers (C16H18O2⁺, m/z 302) via SP-AMS were obviously higher under a higher initial concentration, thereby demonstrating that the oligomerization reaction proceeded more easily. The absorption at 250 nm recorded by UV-vis was distinctly enhanced, which might be attributed to new light-absorbing products with absorbance at 250 nm. Furthermore, the HULIS concentration increased with reaction time, in accordance with enhancement of absorbance in the 300-400 nm region, thus suggesting that aqueous-phase processing formed brown carbon. Small organic acids, including formic acid, malic acid, and oxalic acid, were detected by IC in all reaction solutions, with the highest concentration being for formic acid. GC/MS detected ketone, an OH monomer, and dimers in the aqSOA, which further indicates that functionalization and oligomerization took place.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Oxalic acid Controlled terms:Aerosols - Atmospheric chemistry - Budget control - Chemical industry - Dimers - Formic acid - Gas chromatography - Integrated circuits - Ion chromatography - Ketones - Mass spectrometry - Oligomerization - Organic carbon - Oxidation - Ultraviolet visible spectroscopy Uncontrolled terms:Aerosol mass spectrometry - Aqueous-phase processing - Complicated reactions - Gas chromatography-mass spectrometries (GC-MS) - Humic-like substances - Photochemical oxidation - Product characteristics - Secondary organic aerosols Classification code:714.2 Semiconductor Devices and Integrated Circuits - 801 Chemistry - 801.1 Chemistry, General - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 805 Chemical Engineering, General - 815.1.1 Organic Polymers Numerical data indexing:Molar_Concentration 3.00e+00mol/m3 to 2.20e-02mol/m3, Molar_Concentration 3.00e-01mol/m3 to 2.20e-02mol/m3, Molar_Concentration 3.00e-02mol/m3 to 2.20e-02mol/m3, Molar_Concentration 3.00e-02mol/m3 to 3.00e+00mol/m3, Size 2.50e-07m, Size 3.00e-07m to 4.00e-07m DOI:10.13227/j.hjkx.201906167 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990446 Title:Chemical Characteristics of Arsenic in PM2.5 in Beijing Title of translation:北京市PM2.5中砷污染特征 Authors:Shi, Shao-Xuan (1, 2); Yang, Yan-Rong (1, 2); Qin, Juan-Juan (1, 2); Zhou, Xue-Ming (1, 3); Duan, Jing-Chun (3); Tan, Ji-Hua (1, 2); Chen, Rong-Zhi (1, 2) Author affiliation:(1) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Zhou, Xue-Ming(zhouxueming14@mails.ucas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:57-64 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study assesses the chemical characteristics of As in aerosol PM2.5 samples that were collected from July 2011 to May 2012 in Beijing, China. Total As, As(Ⅲ), and As(Ⅴ) were analyzed by inductively coupled plasma mass spectrometry (ICP-MS), high performance liquid chromatography (HPLC), and hydride generation atomic fluorescence (HG-AFS), respectively. The average concentrations of total As, As(Ⅲ) and As(Ⅴ) over the entire sampling period were (21.82±17.01), (3.15±1.94), and (10.78±5.39) ng•m^-3, respectively. The average concentrations of total As, As(Ⅲ) and As(Ⅴ) were (16.62±5.80), (18.34±9.00), (21.49±10.22), and (29.52±27.97) ng•m^-3 during the spring, (5.42±2.5), (1.61±0.51), (2.88±1.12), and (3.27±1.23) ng•m^-3 during the summer, and (7.55±1.47), (13.57±13.34), (12.75±6.54), and (8.68±3.57) ng•m^-3 during the winter, respectively. The average concentrations of As(Ⅲ) in different seasons were higher than As(Ⅴ) concentrations. Seasonal characteristics may be caused by seasonal differences in diffusion conditions, emission sources, and atmospheric oxidation. The ratios of average concentrations of As(Ⅲ)/As(Ⅴ) were 0.67 in spring, 0.13 in summer, 0.27 in autumn, and 0.44 in winter. Ratios of As(Ⅲ)/As(Ⅴ) were negatively correlated with relative humidity, which indicates that high humidity conditions may not have been favorable for the transformation of As(Ⅲ) into As(Ⅴ). As(Ⅲ)/As(Ⅴ) and As(Ⅲ) both showed positive correlations with Ca²⁺, thereby indicating that soil dust may have been an important source of As(Ⅲ).
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Atmospheric humidity Controlled terms:Arsenic - High performance liquid chromatography - Inductively coupled plasma mass spectrometry - Springs (components) Uncontrolled terms:Atmospheric oxidation - Average concentration - Chemical characteristic - Hydride generations - Inductively coupled plasma mass spectrometries (ICPMS) - Positive correlations - Seasonal characteristics - Seasonal differences Classification code:443.1 Atmospheric Properties - 601.2 Machine Components - 801 Chemistry - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201905183 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070529 Title:Analysis of Water Soluble Organic Aerosol in Spring PM2.5 with Soot Particle Aerosol Mass Spectrometry (SP-AMS) Title of translation:黑炭气溶胶质谱仪(SP-AMS)分析春季 PM2.5中水溶性有机气溶胶 Authors:Huang, Wen-Qian (1); Chen, Yan-Tong (1); Li, Xu-Dong (1); Zhao, Zhu-Zi (1); Ma, Shuai-Shuai (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) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Ye, Zhao-Lian(bess_ye@jsut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:609-619 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the chemical composition and pollution characteristics of spring fine particles (PM2.5) in Changzhou, a total of 84 PM2.5 samples were collected from March 1st to May 30th, 2017. We measured and analyzed conventional components, such as water-soluble ions (WSIIs) and carbonaceous components (OC and EC). The water-soluble organic aerosol (WSOA) was also analyzed by an aerodyne soot particle aerosol mass spectrometer (SP-AMS). During the sampling period, the average daily PM2.5 concentration was 101.97 μg•m^-3, with more than 73.8% sampling days exceeding the Target-2 standard of the national ambient air quality standard of China. The air quality during the sampling period was dominated by light, moderate, and heavy pollution, accounting for 39.3%, 21.4%, and 13.1% of the total days, respectively. The total WSIIs accounted for 39. 86% of PM2.5 mass, of which secondary ions (SO4^2-, NH4⁺, and NO3^-) accounted for 81.85% of the total WSIIs. The slope of the linear fitted line of the anion and cation charge balance (AE/CE) was greater than 1 (1.09), which indicated that PM2.5 was weakly acidic. The average OC/EC ratio was 2.53, indicating that PM2.5 was influenced by the secondary conversion. WSOA included CxHy⁺(32.1%), CxHyO⁺(30.4%), CxHyO2⁺(25.4%), and HyO⁺(4.7%) identified by SP-AMS. The average oxygen-to-carbon (O/C), hydrogen-to-carbon (H/C), nitrogen-to-carbon (N/C), and organic matter-to-organic carbon (OM/OC) ratios of the WSOA were 0.72, 1.53, 0.04, and 2.15, respectively. Higher O/C indicated higher contributions from secondary photochemical reaction conversion in spring. Positive matrix factorization (PMF) analysis for AMS mass spectra of WSOA identified three sources, namely hydrocarbon-like (HOA), semi-volatile oxygenated OA (SVOOA)-biomass burning OA (BBOA), and low-volatility oxygenated OA (LVOOA), which on average accounted for 18.4%, 34.1%, and 47.4% of the total WSOA, respectively.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Organic carbon Controlled terms:Aerosols - Air quality - Factorization - Ions - Mass spectrometers - Mass spectrometry - Matrix algebra - Photochemical reactions - Soot - Springs (components) Uncontrolled terms:Aerosol mass spectrometers - Fine particles - Organic aerosol - Positive Matrix Factorization - Source apportionment Classification code:451.2 Air Pollution Control - 601.2 Machine Components - 741.1 Light/Optics - 801 Chemistry - 804 Chemical Products Generally - 804.1 Organic Compounds - 921 Mathematics - 921.1 Algebra Numerical data indexing:Percentage 1.31e+01%, Percentage 1.84e+01%, Percentage 2.14e+01%, Percentage 2.54e+01%, Percentage 3.04e+01%, Percentage 3.21e+01%, Percentage 3.41e+01%, Percentage 3.93e+01%, Percentage 4.70e+00%, Percentage 4.74e+01%, Percentage 7.38e+01%, Percentage 8.18e+01%, Percentage 8.60e+01% DOI:10.13227/j.hjkx.201907263 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070757 Title:Characteristics and Factors of Soil Enzyme Activity for Different Plant Communities in Yellow River Delta Title of translation:黄河三角洲不同植物群落土壤酶活性特征及影响因子分析 Authors:Mo, Xue (1); Chen, Fei-Jie (1); You, Chong (1); Liu, Fu-De (1) Author affiliation:(1) School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin; 300384, China Corresponding author:Liu, Fu-De(lfdsy@tjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:895-904 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil enzymes play key roles in the construction and succession of coastal wetland communities, while the driving mechanism of their activities under water and salt stress conditions is still unclear. The activities and distributions of sucrase, phosphatase, catalase, and urease in the rhizosphere and non-rhizosphere soils of Suaeda salsa, Phragmites australis, and Tamarix chinensis communities were studied in the Yellow River Delta. Moreover, the changes in soil enzyme activities and their influencing factors during the succession of halophytic plant communities were discussed in combination with changes in the physicochemical properties of soil. The results showed significantly higher soil enzyme activities and soil fertility parameters in the rhizosphere soils of S. salsa, P. australis, and T. chinensis communities than those in the non-rhizosphere soils (P<0.05). In the rhizosphere soils, the activities of phosphatase and catalase increased in the order of S. salsa4⁺-N) (P<0.05). Meanwhile, urease activity was significantly positively correlated with total nitrogen (TN), organic matter (SOM), AK, AP, NH4⁺-N, and nitrate nitrogen (NO3^--N) (P<0.01). Both of the two enzymes were negatively correlated with soil electrical conductivity (EC) (P<0.01). The phosphatase and catalase activities were found to be significantly positively correlated with soil water content (MC), total carbon (TC), TN, total phosphorus (TP), SOM, AK, and NH4⁺-N (P<0.05). Additionally, parameters of pH, total potassium (TK), and NO3^--N were also significantly associated with catalase activity. Finally, the redundancy analysis (RDA) revealed that main factors affecting the overall soil enzyme activity were TC (P<0.01), SOM (P<0.01), MC (P<0.01), TN (P<0.05), NH4⁺-N (P<0.05), and EC (P<0.05). The findings suggested that soil fertility, water, and salinity are the most influential factors of soil enzyme activity in different halophytic plant communities of the Yellow River Delta.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Enzyme activity Controlled terms:Phosphatases - Phosphorus - Physicochemical properties - Plants (botany) - Potassium - Rivers - Soil moisture - Wetlands Uncontrolled terms:Halophyte - Non rhizospheres - Soil enzyme activity - Soil physico-chemical properties - Yellow River delta Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 549.1 Alkali Metals - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201908051 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070545 Title:Phosphate Adsorption from Water on CaO2-loaded Magnetic Diatomite Title of translation:磁性硅藻土负载纳米过氧化钙对水中磷酸盐吸附 Authors:Xu, Chu-Tian (1); Li, Da-Peng (1); Zhang, Shuai (1); Geng, Xue (1); Chen, Li-Yuan (1); Song, Xiao-Jun (1); Guo, Chao-Ran (1); Huang, Yong (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Li, Da-Peng(ustsldp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:792-800 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, magnetic diatomite was used as a carrier to load calcium peroxide(CaO2) nanoparticles, fabricating a high efficiency phosphate adsorption and recovery composite material(MDCP). The micromorphology, inner structure, crystalline constituents and element composition of MDCP were characterized by SEM, EDX-mapping, XRD, XDS, and VSM, respectively. The adsorption isotherm data of MDCP exhibited good agreement with the Langmuir isotherm model. According to the Langmuir model, when T=20℃, the maximum monolayer phosphate adsorption capacities can reach 191. 84mg•g^-1 for MDCP. The isotherm and kinetics studies showed that MDCP has a regulating effect on the pH of the solution, which can maintain the pH of the solution at the level where adsorption of phosphate occurs on MDCP as a chemisorption process. pH plays a important role on the adsorption of phosphate by MDCP, the pH of effective adsorption ranges from 4 to 10, and the pH of the adsorbed solution can still be maintained in the range of 7 to 9. The MDCP exhibited a high selective adsorption for phosphate in the presence of anions, including Cl^-, SO4^2-, CO3^2-, HCO3^2-, F^-, and NO3^-. The recovered MDCP could be desorbed by HCl solution, and after desorption, the phosphate removal rate of MDCP after re-loading CaO2 could still reach 70% of the initial adsorption.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Calcium compounds Controlled terms:Adsorption - Adsorption isotherms - Chlorine compounds - Desorption - Monolayers - Nanocrystalline materials - Nanomagnetics - Oxidation - Peroxides - Phosphates Uncontrolled terms:Calcium peroxides - Element compositions - Initial adsorption - Langmuir isotherm models - Magnetic diatomite - Phosphate adsorption - Phosphate adsorption capacity - Selective adsorption Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 761 Nanotechnology - 802.2 Chemical Reactions - 802.3 Chemical Operations Numerical data indexing:Percentage 7.00e+01% DOI:10.13227/j.hjkx.201909094 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278096 Title:Preparation of Tea Waste Biochar and Its Application in Tetracycline Removal from Aqueous Solution Title of translation:茶渣生物炭制备及其对溶液中四环素的去除特性 Authors:Fan, Shi-Suo (1); Liu, Wen-Pu (1); Wang, Jing-Tao (1); Hu, Hong-Mei (1); Yang, Yi-Ning (1); Zhou, Na (1) Author affiliation:(1) School of Resources and Environment, Anhui Agricultural University, Hefei; 230036, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1308-1318 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Tea waste biochar (TWBC) was prepared at 300℃, 500℃, and 700℃ under oxygen-limited atmosphere, and was characterized by elemental analysis, Brunauer-Emmett-Teller measurement, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. TWBC was then used to remove tetracycline from aqueous solution. The influences of solid-to-liquid ratio, pH, ionic types, and strength were investigated. The potential mechanism between tetracycline and TWBC was also explored. The results showed that the proper solid-to-liquid ratio was 4 g•L^-1. The pH of the solution had little influence on the removal of tetracycline. The inhibition effects of cation ions on tetracycline follows Mg²⁺>Ca²⁺>K⁺>Na⁺. The NH4⁺ in the solution can slightly promote the adsorption of tetracycline by TWBC700. However, the existence of Cu can decrease the adsorption effect of tetracycline by TWBC700. Increasing temperature can improve the adsorption effect of tetracycline by TWBC700. The pseudo-second-order and Langmuir model can well fit the adsorption process of tetracycline onto TWBC. The adsorption capacity of tetracycline by TWBC was TWBC700>TWBC500>TWBC300. The mechanisms of tetracycline by TWBC referred to the pore-filling effect, hydrogen binding, and π-π interaction. Therefore, high-temperature TWBC has the potential to act as an adsorbent for removing tetracycline from wastewater.
© 2020, Science Press. All right reserved. Number of references:48 Main heading:Adsorption Controlled terms:Adsorption isotherms - Fourier transform infrared spectroscopy - Ionic strength - Mechanisms - Tea - X ray photoelectron spectroscopy Uncontrolled terms:Adsorption capacities - Adsorption kinetics - Bio chars - Brunauer emmett tellers - Increasing temperatures - Pseudo second order - Solid-to-liquid ratio - Tetracycline (TC) Classification code:601.3 Mechanisms - 801 Chemistry - 801.4 Physical Chemistry - 802.3 Chemical Operations Numerical data indexing:Mass_Density 4.00e+00kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201908179 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371275 Title:Relationship Between Urban Industrialization and PM2.5 Concentration in China and the Internal Mechanism of EKC Title of translation:中国城市工业化发展与PM2.5的关系:兼论EKC曲线形成的内在机制 Authors:Li, Ya-Nan (1); Ding, Zhen-Min (1); Deng, Yuan-Jie (1); Hou, Meng-Yang (1); Yao, Shun-Bo (1) Author affiliation:(1) Resource Economy and Environmental Management Center, College of Economics and Management, Northwest A&F University, Yangling; 712100, China Corresponding author:Yao, Shun-Bo(yaoshunbo@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1987-1996 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the panel data of 255 cities in China, this study built a spatial Durbin model to study the impact of China's industrialization on the PM2.5 pollution level. Meanwhile, an environmental governance tool characterized by forest and grass coverage was introduced to explore the internal mechanism and exogenous driving force of EKC. The results show that ① the relationship between industrialization and PM2.5 concentration is obviously an inverted u-shaped, and the EKC hypothesis was verified. ② The formation of the EKC curve was caused by the external factors and not the endogenous mechanism of economic growth. Forest-grass coverage plays a regulating role in the relationship between industrialization and PM2.5 pollution level, namely the inverted u-shaped structure of environmental EKC results from environmental governance tool with forest and grass cover rather than the automatic adjustment of economic growth. ③ The influence of industrialization on PM2.5 concentration has a spatial spillover effect. Urban industrialization not only affects the PM2.5 concentration in local regions but also its neighboring region.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Industrial economics Controlled terms:Forestry - Pollution Uncontrolled terms:Environmental Kuznets curves - Forest-grass coverage - Industrialization - PM2.5 - Regulating effect Classification code:911.2 Industrial Economics DOI:10.13227/j.hjkx.201910042 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658127 Title:PM2.5 Concentration Influencing Factors in China Based on the Random Forest Model Title of translation:基于随机森林模型的中国PM2.5浓度影响因素分析 Authors:Xia, Xiao-Sheng (1, 2); Chen, Jing-Jing (1, 2); Wang, Jia-Jia (1, 2); Cheng, Xian-Fu (1, 2) Author affiliation:(1) College of Geography and Tourism, Anhui Normal University, Wuhu; 241002, China; (2) Provincial Key Laboratory of Natural Disaster Process and Prevention, Anhui Province, Wuhu; 241002, China Corresponding author:Cheng, Xian-Fu(xianfucheng@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2057-2065 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this paper, aerosol optical depth (AOD), elevation (DEM), annual precipitation (PRE), annual average temperature (TEM), annual average wind speed (WS), population density (POP), gross domestic product density (GDP), and normalized difference vegetation index (NDVI) were selected as factors influencing PM2.5 concentration. The random forest model, order of feature importance, and partial dependency plots were applied to investigate these factors and their regional differences in PM2.5 spatial pattern. The results showed that: ① The random forest model was more accurate than multiple regression, generalized additive, and back propagation neural network models in estimating PM2.5 concentration, which can be applied to quantifying PM2.5 influencing factors. ② PM2.5 concentration initially increased and then remained stable with increases in AOD, POP, and GDP, and initially decreased and then stabilized with increases in PRE, WS, and NDVI. The responses of DEM and TEM to PM2.5 concentration changed from decline to ascend and then changed to decline again. ③ AOD had the largest influence on PM2.5 annual concentrations with a spatial influencing magnitude of 37.96%, whereas PRE had the least influence with a merely individual spatial influencing magnitude of 5.75%. ④ The relationships between PM2.5 pollution and influencing variables vary with geography and thus exhibit significant spatial heterogeneity. The same factor had different spatial influencing magnitudes on PM2.5 annual concentrations in seven geographical subareas. AOD had the greatest influence on PM2.5 concentration in the south of China, with the least influence in the northeast.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Random forests Controlled terms:Backpropagation - Decision trees - Internet protocols - Organic pollutants - Population statistics - Wind Uncontrolled terms:Aerosol optical depths - Annual average wind speed - Back propagation neural networks - Generalized additives - Gross domestic products - Normalized difference vegetation index - Random forest modeling - Spatial heterogeneity Classification code:443.1 Atmospheric Properties - 723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 804.1 Organic Compounds - 961 Systems Science Numerical data indexing:Percentage 3.80e+01%, Percentage 5.75e+00% DOI:10.13227/j.hjkx.201910126 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658167 Title:Remediation of Heavy-Metal-Contaminated Soil by EGTA Washing Enhanced with Reduction Solubilization Title of translation:还原增溶强化EGTA淋洗修复重金属污染土壤 Authors:Zhang, Jin-Yong (1); Zhu, Yu-Ting (1); Wang, Ming-Xin (1); Han, Ying (1); Ge, Jia-Qi (1) Author affiliation:(1) College of Environmental and Safety Engineering, Changzhou University, Changzhou; 213164, China Corresponding author:Wang, Ming-Xin(wmxcau@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2390-2397 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study used a reducing agent to regulate the activity of heavy metals in soil, with the aim of enhancing the washing efficiency of heavy metals in soil by ethylene glycol bis (2-aminoethyl ether) tetraacetic acid (EGTA). The effects of EGTA dosage, reductant type, liquid-solid ratio, and leaching time on washing efficiency were studied. The heavy metal concentrations in the washing solution and the chemical specification under different washing conditions were analyzed. Scanning electron microscopy/energy-dispersive X-ray spectroscopy and Fourier-transform infrared spectroscopy were used to characterize the soil samples under different treatments. The results showed that the washing efficiencies of Cu, Zn, Pb, and Cd were 85.0%, 60.7%, 88.6%, and 66.4%, respectively, when the liquid-solid ratio was 7.5:1, the leaching time was 2 h, and the dosage of EGTA and sodium thiosulfate (Na2S2O3) was 5 g•L^-1. Compared with single EGTA treatment, the leaching concentration of the four heavy metals all decreased, with the Pb decreasing most significantly. The soil particles became smaller, the aggregate structure was destroyed, the O and Al content decreased, the Si content increased, and therefore the adsorption capacity of soil mineral components was supposed to decrease. The soil organic matter content decreased significantly, and the -OH vibration was significantly weakened, indicating that the organic functional groups with stronger coordination ability were reduced, and the adsorption of organic components in the soil was reduced. The decrease in content of strongly adsorbed components in soil is an important mechanism for Na2S2O3 to enhance heavy metal elution by EGTA.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Soil pollution Controlled terms:Chemical analysis - Contamination - Efficiency - Ethylene - Ethylene glycol - Fourier transform infrared spectroscopy - Heavy metals - Leaching - Remediation - Scanning electron microscopy - Sodium compounds - Soils - Washing - X ray spectroscopy Uncontrolled terms:Adsorption capacities - Aggregate structures - Chemical specifications - Heavy metal concentration - Heavy metal contaminated soils - Leaching concentrations - Organic functional groups - Soil organic matter contents Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 913.1 Production Engineering Numerical data indexing:Mass_Density 5.00e+00kg/m3 to 2.20e-02kg/m3, Percentage 6.07e+01%, Percentage 6.64e+01%, Percentage 8.50e+01%, Percentage 8.86e+01%, Time 7.20e+03s DOI:10.13227/j.hjkx.201909265 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106138 Title:Effect of Land-use on Soil Fungal Community Structure and Associated Functional Group in Huixian Karst Wetland Title of translation:土地利用方式对会仙岩溶湿地土壤真菌群落和功能类群的影响 Authors:Cheng, Yue-Yang (1); Jin, Zhen-Jiang (1, 2, 3); Wang, Xiao-Tong (1); Jia, Yuan-Hang (1); Yuan, Wu (1); Zhou, Jun-Bo (1) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin; 541004, China; (3) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin; 541004, China Corresponding author:Jin, Zhen-Jiang(zhenjiangjinjin@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4294-4304 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Studying the impact of land-use on fungal communities and their functional groups in wetland soil can provide a theoretical basis for the protection of wetlands. The top soil (0-20 cm) samples were collected from the wetlands with Phragmites communis (PCW), wetlands with Cladium chinense (CCW), abandoned paddy fields (APF), paddy fields (PF), and corn fields (CF) in the Huixian Karst Wetland. The fungal community structure and its functional groups were analyzed using high-throughput sequencing methods and the FUNGuild database, respectively. The results showed that the Simpson and Shannon index in PF and CF were significantly higher than those in PCW and CCW. Ascomyceta was the most dominant phylum in five land-use types with the abundance of 70.60%-87.02%, followed by Rozellomycota in PCW with the abundance of 7.14% and Basidiomycota in CCW, APF, PF, and CF with the abundance of 9.70%, 5.19%, 8.13%, and 7.50%, respectively. Pleosporales was the most dominant order in PCW with the abundance of 16.47%, while Hypocreales was the dominant one in CCW, APF, PF, and CF with the abundance of 22.52%, 23.50%, 17.60, and 23.80%, respectively. Ascobolus and Archaeorhizomyces were the most dominant genera in PCW and CCW with the abundance of 6.65% and 13.44%, respectively, and Fusarium was the most dominant genus in APF, PF, and CF with the abundance of 10.22%, 10.51%, and 11.12%, respectively. Saprotroph was the main trophic mode in the Huixian wetland with the abundance of 48.67%-80.13%. The abundance of pathotroph in CF (5.39%) was higher than that in PCW (2.34%) and CCW (1.53%). Dung saprotroph-wood saprotroph and soil saprotroph were the most dominant functional groups in PCW and CCW, respectively, while animal pathogen-endophyte-lichen parasite-plant pathogen-soil saprotroph-wood saprotroph was the most dominant functional group in APF, PF, and CF. Redundancy analysis showed that both soil water content and the ratio of carbon-to-nitrogen were the main factors affecting fungal communities, and available nitrogen was the main factor affecting the functional groups. Overall, the results indicated that land-use has changed the soil fungal diversity and community structure, complicated the functional groups, and increased the risk of corn disease in the Huixian Karst wetland.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Fungi Controlled terms:Land use - Nitrogen - Soil moisture - Wetlands Uncontrolled terms:Available nitrogen - Community structures - Fungal diversity - High-throughput sequencing - Phragmites communis - Redundancy analysis - Soil fungal communities - Soil water content Classification code:403 Urban and Regional Planning and Development - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally Numerical data indexing:Percentage 1.02e+01%, Percentage 1.05e+01%, Percentage 1.11e+01%, Percentage 1.34e+01%, Percentage 1.53e+00%, Percentage 1.65e+01%, Percentage 2.25e+01%, Percentage 2.34e+00%, Percentage 2.35e+01%, Percentage 2.38e+01%, Percentage 4.87e+01% to 8.01e+01%, Percentage 5.19e+00%, Percentage 5.39e+00%, Percentage 6.65e+00%, Percentage 7.06e+01% to 8.70e+01%, Percentage 7.14e+00%, Percentage 7.50e+00%, Percentage 8.13e+00%, Percentage 9.70e+00%, Size 0.00e+00m to 2.00e-01m DOI:10.13227/j.hjkx.202001055 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008898 Title:Effect of Porous Fillers Properties on Biofilm Growth Title of translation:多孔填料特性对生物膜形成影响 Authors:Jiang, Yu-Qin (1); Li, Jiong-Hui (1); Fang, Zhi-Guo (1) Author affiliation:(1) School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou; 310013, China Corresponding author:Li, Jiong-Hui(56725362@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3684-3690 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As an important part of biological aerated filters (BAFs), porous fillers are key to the effectiveness of BAF wastewater treatment. At present, there are many types of fillers, but the influence of the surface physical and chemical properties on biofilm formation is unclear, and how to compare and select the best biological filler remains a difficult problem in BAF engineering applications. In this study, the physical and chemical characteristics of several porous biological fillers that are commonly used in BAFs were studied, and the correlation between their physical/chemical properties and the biofilm attachment and enzyme activity of the biofilm on the filler was investigated. The results showed that the sponge filler could easily absorb sludge, but also clogged easily and the overall biofilm activity was not high. The three-dimensional hollow filler had a low surface-adsorbed biomass, but the specific surface area was large and the surface attachment growth biofilm activity was relatively strong. Ceramsite had a good hydrophilicity and high surface roughness, and the zeta potential was the most positive. Moreover, microorganisms easily attached and grew, it had the strongest sludge adhesion performance, and the best biofilm activity. According to a redundancy analysis (RDA), the main factor affecting the biomass on the surface of the fillers was the zeta potential, whereas the main factors affecting the surface sludge activity of the fillers was the clearance rate. According to the removal load of NH4⁺-N by six groups of reactors, the removal load of NH4⁺-N by ceramsite was the largest [68 g•(m³•d)^-1], and was followed by volcanic rocks [67 g•(m³•d)^-1]. Combined with the above factors, ceramsite was determined to be the most suitable filler for BAF.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Fillers Controlled terms:Biofilms - Biofilters - Biological water treatment - Ecology - Enzyme activity - Surface roughness - Volcanic rocks - Wastewater treatment - Zeta potential Uncontrolled terms:Adhesion performance - Biological aerated filter - Biological fillers - Engineering applications - Physical and chemical characteristics - Physical and chemical properties - Redundancy analysis (RDA) - Surface attachment Classification code:445.1 Water Treatment Techniques - 452.4 Industrial Wastes Treatment and Disposal - 454.3 Ecology and Ecosystems - 461.9 Biology - 462.5 Biomaterials (including synthetics) - 482.2 Minerals - 801.3 Colloid Chemistry - 931.2 Physical Properties of Gases, Liquids and Solids DOI:10.13227/j.hjkx.201912226 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371362 Title:Temporal and Spatial Distribution Characteristics and Difference Analysis of Nitrogen and Phosphorus in Daihai Lake Title of translation:岱海水体氮,磷时空分布特征及其差异性分析 Authors:Zhao, Li (1); Chen, Jun-Yi (1); Jiang, Xia (1); Zheng, Shuo-Fang (1); Wang, Shu-Hang (1) Author affiliation:(1) National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Wang, Shu-Hang(shuhang125126@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1676-1683 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the historical monitoring survey data from 2018 to 2019, the temporal and spatial distribution characteristics and main influencing factors of nitrogen and phosphorus in the overlying water in Daihai Lake were analyzed, and the differences of the temporal and spatial distribution were discussed. The results showed that the content of total nitrogen and total phosphorus in the overlying water was at a high level, especially the total nitrogen content was obviously higher than that in other lakes in China. The content of total nitrogen ranged from 3.29 mg•L^-1 to 4.99 mg•L^-1, with a mean value of (3.93±0.33) mg•L^-1; the content of total phosphorus ranged from 0.063 mg•L^-1 to 0.163 mg•L^-1, with a mean value of (0.111±0.023) mg•L^-1. In spring and summer, the content of total nitrogen and total phosphorus in the overlying deep water from the middle of the lake was significantly higher than that in the surrounding area. In autumn, the contents decreased from east to west, and in winter, the contents in the shallow water of the southern area were higher than that in the northern area. Nitrogen and phosphorus in the overlying water were mainly in the dissolved state, and the proportions of total dissolved nitrogen and phosphorus were 86.62% and 77.84%, respectively. The dissolved nitrogen was dominated by nitrate, whereas dissolved phosphorus was dominated by organic phosphorus. The concentration of lake water and the release of endogenous nutrient salts are the main reasons for the high total nitrogen and phosphorus. To prevent further deterioration of water quality, it is suggested to carry out endogenous treatment and ecological restoration in combination with engineering measures.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Spatial distribution Controlled terms:Deterioration - Dissolution - Forming - Lakes - Phosphorus - Water quality Uncontrolled terms:Dissolved phosphorus - Ecological restoration - Engineering measures - Nitrogen and phosphorus - Temporal and spatial distribution - Total nitrogen - Total nitrogen content - Total phosphorus Classification code:445.2 Water Analysis - 802.3 Chemical Operations - 804 Chemical Products Generally - 921 Mathematics - 951 Materials Science Numerical data indexing:Mass_Density 3.29e-03kg/m3 to 4.99e-03kg/m3, Mass_Density 6.30e-05kg/m3 to 1.63e-04kg/m3, Percentage 7.78e+01%, Percentage 8.66e+01% DOI:10.13227/j.hjkx.201909090 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861884 Title:Characteristics and Reactivity of VOCs in Hangzhou During a Typical Photochemical Pollution Episode Title of translation:典型光化学污染期间杭州大气挥发性有机物污染特征及反应活性 Authors:Jing, Sheng-Ao (1); Ye, Xu-Hong (2); Gao, Ya-Qin (1); Peng, Ya-Rong (1, 3); Li, Ying-Jie (1); Wang, Qian (1); Shen, Jian-Dong (2); Wang, Hong-Li (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) Hangzhou Environmental Monitoring Central Station, Hangzhou; 310007, China; (3) Department of Environmental Science & Engineering, Fudan University, Shanghai; 200433, China Corresponding author:Wang, Hong-Li(wanghl@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3076-3084 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An intensive observation of ambient volatile organic compounds (VOCs) was carried out in Hangzhou, a key city in the Yangtze River Delta, during a typical photochemical pollution episode from September 14-23, 2018. The analysis results of 80 effective samples showed that the average concentration of 122 compounds of VOCs was (59.5±19.8)×10^-9 during the observation period, and oxygenated VOCs (OVOCs) were the most abundant component. The assessment results of atmospheric reaction activity with ozone formation potential (OFP) showed that the average value of OFP was 145×10^-9 during the observation period, of which alkenes and carbonyl compounds were the most abundant components. The chemical reactivity of VOCs in Hangzhou was equivalent to acrylonitrile. Based on the positive matrix factorization (PMF) model, five major sources of VOCs in Hangzhou were identified, including secondary formation (25.2%), combustion and industrial processing (27.2%), solvent use (17.3%), biogenic sources (9.2%), and vehicular exhaust (21.2%). The results can provide guidance for further understanding of VOC characteristics and the basis for scientific prevention and control measures in Hangzhou.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:River pollution Controlled terms:Air pollution - Carbonyl compounds - Factorization - Volatile organic compounds Uncontrolled terms:Atmospheric reactions - Average concentration - Industrial processing - Ozone formation potentials - Photochemical pollution - Positive matrix factorization models - Prevention and controls - Yangtze river delta Classification code:451 Air Pollution - 453 Water Pollution - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.73e+01%, Percentage 2.12e+01%, Percentage 2.52e+01%, Percentage 2.72e+01%, Percentage 9.20e+00% DOI:10.13227/j.hjkx.201911187 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104904 Title:Adsorption of Cadmium and Arsenic by Corn Stalk Biochar Solidified Microorganism Title of translation:玉米秸秆生物炭固化细菌对镉砷吸附 Authors:Liu, Yu-Ling (1, 2, 3); Zhu, Hu-Cheng (1); Peng, Ou (1, 2, 3); Li, Dan-Yang (1, 2, 3); Yang, Rui-Jia (1, 2, 3); Peng, Jing (1, 2, 3); Tie, Bai-Qing (1, 2, 3) Author affiliation:(1) College of Resources and Environment, Hunan Agricultural University, Changsha; 410128, China; (2) Engineering Research Center for Water Pollution Purification of Irrigation Source in Hunan Province, Changsha; 410128, China; (3) Hunan Engineering Research Center for Safe and High-Efficient Utilization of Heavy Metal Pollution Farmland, Changsha; 410128, China Corresponding author:Tie, Bai-Qing(tiebq@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4322-4332 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Immobilization of bacteria on biochar can improve the performance of the soil complex polluted with cadmium (Cd) and arsenic (As). In this study, bacteria (Delftia sp. B9, B9), biochar (corn stalks biochar, CSB), and biochar-bacteria complexes (B-CSB) were used as adsorption materials to explore the adsorption characteristics of Cd and As. The effects of pH on the adsorption performance of Cd and As and the ion removal from the aqueous solution were investigated, and the adsorption behaviors were simulated using an isothermal adsorption model. The changes in Cd and As speciation with the addition of B9, CSB, and B-CSB to As and Cd-contaminated soil were explored. The results showed that the Cd-saturated adsorption capacities of B9, CSB, and B-CSB were 49.43, 82.68, and 75.38 mg•g^-1, respectively; the As-saturated adsorption capacities were 24.67, 42.92, and 34.03 mg•g^-1, respectively. The concentration of available Cd and As significantly decreased, whereas the residual fraction increased after the addition of B-CSB. B-CSB was shown to be an effective material for the remediation of soil complexes polluted with Cd and As.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Cadmium Controlled terms:Adsorption - Arsenic - Bacteria - Cadmium compounds - Remediation - Soil pollution - Soils Uncontrolled terms:Adsorption behavior - Adsorption characteristic - Adsorption materials - Adsorption performance - Cd-contaminated soils - Effective materials - Isothermal adsorption - Saturated adsorption capacity 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 - 802.3 Chemical Operations - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201912036 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008867 Title:Impact of Tetracycline Antibiotic on the Transcriptional Expression of Tetracycline Resistance Genes in Shigella flexneri Title of translation:四环素胁迫对Shigella flexneri细菌四环素抗性基因抗性表达的影响过程 Authors:Gao, Pin (1); Ruan, Xiao-Hui (1); Qiu, Wen-Jie (1); Xue, Gang (1); Qian, Ya-Jie (1) Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China Corresponding author:Qian, Ya-Jie(yqian@dhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3758-3764 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The tetracycline (TC) antibiotic has been widely found in different environmental matrices. The tetracycline resistant bacterium (TRB) of Shigella flexneri was screened and purified from activated sludge, and was then used to study the impact of TC stress on the gene abundances and expression levels of TC resistance genes (TC-ARGs), including tetC, tetO, and tetX, which were respectively quantified by quantitative PCR and reverse transcriptional PCR. Correlations between the TC concentration and gene abundances of TC-ARGs and their expression levels were discussed. The results showed that TC stress had an inhibiting effect on the growth of Shigella flexneri during the entire culture cycle (24 h) and that the growth rate of the bacterial concentration decreased with increasing TC concentration. However, less impact on the gene abundance of TC-ARGs was found. TC stress could promote the expression of TC-ARGs in Shigella flexneri, and the expression levels of tetC, tetO, and tetX genes first increased and then decreased. The correlation results indicated that no significant correlation was observed between the TC concentration and gene abundances of TC-ARGs and their expression levels. Nevertheless, the gene abundances of tetC and tetO were significantly correlated with their expression levels, thus indicating that they can be used to evaluate and assess expression levels to a certain extent.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Transcription Controlled terms:Antibiotics - Polymerase chain reaction Uncontrolled terms:Activated sludge - Environmental matrixes - Expression levels - Inhibiting effect - Quantitative PCR - Resistant bacteria - Shigella flexneri - Tetracycline antibiotics Classification code:461.6 Medicine and Pharmacology - 461.9 Biology - 801.2 Biochemistry Numerical data indexing:Time 8.64e+04s DOI:10.13227/j.hjkx.202001081 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106246 Title:Performance Assessment of Field-scale Dry Grass Swale with Shallow Substrate Layer Title of translation:浅基质层干植草沟运行效果的现场实验 Authors:Zhang, Jia-Wei (1); Li, Tian (1); Zhang, Ting-Xiu (1) Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China Corresponding author:Li, Tian(tianli@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4105-4112 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A field-scale dry grass swale with impermeable bottom and shallow substrate layer was built in Shanghai, where the groundwater table is very high, to avoid groundwater pollution caused by runoff infiltration. The underdrain pipe of the facility was up bended to avoid outside water flowing backward because local ground elevation is very low. Performance of the facility under the actual precipitation conditions was evaluated in the rainy season of 2019. The average runoff volume reduction is 39.4%, and the peak flow is reduced effectively when rain intensity is lower than 8.0 mm•h^-1. Influent mass load reduction of TSS, COD, TP, and TN are 95.4%, 83.1%, 90.0%, and 57.7%, respectively. Wood chips in the substrate layer and the saturated zone are effective for denitrification during the wet and dry periods, respectively. Hydraulic loading rate and antecedent drying period are the main factors affecting denitrification. Improved influent quality combined with the storage volume supplied by the local urban river network could meet the goal of annual runoff volume reduction and annual pollution load removal in districts with high groundwater levels.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:River pollution Controlled terms:Denitrification - Groundwater - Groundwater pollution - Infiltration - Runoff - Wood products Uncontrolled terms:Ground elevation - Ground water table - Hydraulic loading rates - Performance assessment - Pollution loads - Saturated zone - Storage volumes - Substrate layers Classification code:444.1 Surface Water - 444.2 Groundwater - 453 Water Pollution - 802.2 Chemical Reactions - 811.2 Wood and Wood Products Numerical data indexing:Percentage 3.94e+01%, Percentage 5.77e+01%, Percentage 8.31e+01%, Percentage 9.00e+01%, Percentage 9.54e+01% DOI:10.13227/j.hjkx.202002005 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658126 Title:Tempo-spatial and Retention Analysis of Total Phosphorus in the Three Gorges Reservoir Title of translation:三峡水库总磷时空变化特征及滞留效应分析 Authors:Tang, Xiao-Ya (1, 2); Tong, Si-Chen (2); Huang, Guo-Xian (1); Xu, Guang-Xiang (2); Li, Dan (3) Author affiliation:(1) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing; 400074, China; (3) School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan; 430072, China Corresponding author:Huang, Guo-Xian(huanggx@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2096-2106 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Phosphorus, as a limiting and vital macronutrient in water, circulates mainly with sediment through rivers. The construction and operation of large reservoirs can have a profound impact on the characteristics of phosphorus transportation and transformation. Based on measured hydrological and water quality data during 2008-2016 in the Three Gorges Reservoir (TGR), a statistical model of total phosphorus (TP) flux and sediment load in different periods was established. The formula of TP flux was established by analyzing the interpolation of unmeasured TP concentration, tempo-spatial characteristics, flux variation, and the retention effect of TP in the TGR. The results indicated that taking no account of the effects of TP inflows of tributaries, annual TP concentration in the TGR varied between 0.196 mg•L^-1 and 0.290 mg•L^-1 during 2008-2012, and inner-annual changes in TP concentration presented an "M" type with two obvious peaks. TP concentration decreased slowly from upstream to downstream of the TGR, and increased significantly from Cuntan to Qingxichang in some years. The average annual TP flux and retention rate of the TGR were 82 300 t and 49.76% during 2008-2012, respectively. During 2013-2016, the average annual TP flux and retention rate decreased significantly, to about 47 900 t and 12.03%, respectively.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Rivers Controlled terms:Phosphorus - Reservoirs (water) - Water quality Uncontrolled terms:Flux variation - Phosphorus transportations - Sediment loads - Spatial characteristics - Statistical modeling - Three gorges reservoir - Total phosphorus - Water quality data Classification code:441.2 Reservoirs - 445.2 Water Analysis - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.96e-04kg/m3 to 2.90e-04kg/m3, Percentage 1.20e+01%, Percentage 4.98e+01% DOI:10.13227/j.hjkx.201911073 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990452 Title:Characteristics of Aerosol Particulate Concentrations and Their Climate Background in Shanghai During 2007-2016 Title of translation:2007~2016年上海颗粒物浓度特征与气候背景异同分析 Authors:Zheng, Qing-Feng (1); Shi, Jun (2); Tan, Jian-Guo (1); Duan, Yu-Sen (3); Lin, Yan-Fen (3); Xu, Wei-Zhong (1) Author affiliation:(1) Key Laboratory of Cities Mitigation and Adaptation to Climate Change in Shanghai, Shanghai Climate Center, Shanghai; 200030, China; (2) Shanghai Ecological Forecasting and Remote Sensing Center, Shanghai; 200030, China; (3) Shanghai Environmental Monitoring Center, Shanghai; 200030, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:14-22 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We use daily aerosol particulate matter<10 μm (PM10) concentration data from 2006 to 2016 in Shanghai along with meteorological elements (wind and temperature), atmospheric stability, temperature inversion, and upper atmosphere circulation data, to analyze the variation characteristics of the PM10 concentrations and differences of the winter climate background. We establish a multivariate linear stepwise regression equation, and also compare and analyze differences in the upper atmospheric circulation by selecting the years with the highest and lowest PM10 concentrations. The results showed an oscillating downward trend in the annual average concentrations of PM10 in Shanghai, whereas seasonally, PM10 concentrations were relatively high in winter and showed two peaks with a low in between. PM10 concentrations were negatively correlated with the daily average wind speed and the daily mixing layer height at 20:00, and positively correlated with the frequency of northwest wind, the mean daily temperature, and the frequency of stable weathers and thermal inversion at 20:00. When the 500 hPa height field in the northern part of China was a positive anomaly in winter, a warm winter prevailed and led to high PM10 concentrations. When the 500 hPa height field was a negative anomaly, cold air frequently moved southward to result in relatively low temperatures, which caused relatively low PM10 concentrations. When the wind field at 850 hPa was easterly, the wind speed was relatively large and resulted in relatively low PM10 concentrations.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Atmospheric temperature Controlled terms:Aerosols - Climatology - Particles (particulate matter) - Upper atmosphere - Wind Uncontrolled terms:Aerosol particulate matters - Aerosol particulates - Annual average concentration - Atmospheric circulation - Atmospheric stability - Meteorological elements - Temperature inversions - Variation characteristics Classification code:443 Meteorology - 443.1 Atmospheric Properties - 951 Materials Science Numerical data indexing:Pressure 5.00e+04Pa, Pressure 8.50e+04Pa DOI:10.13227/j.hjkx.201904219 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608862003 Title:Characteristics, Source Apportionment, and Environmental Impact of Volatile Organic Compounds in Summer in Yangquan Title of translation:阳泉市区夏季挥发性有机物污染特征,来源解析及其环境影响 Authors:Niu, Yue-Yuan (1); Liu, Zhuo-Cheng (1); Li, Ru-Mei (1, 2); Gao, Qian-Zhuo (1); Deng, Meng-Jie (1); Yan, Yu-Long (1); Hu, Dong-Mei (1); Wu, Jing (1); Peng, Lin (1) Author affiliation:(1) Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing; 102206, China; (2) School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing; 102206, China Corresponding author:Wu, Jing(wujing@ncepu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3066-3075 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Volatile organic compounds (VOCs) were collected at three environmental sampling sites in Yangquan and quantified by gas chromatography-mass selective detector/flame ionization detector(GC-MSD/FID). The VOC sources were identified by diagnostic ratios and positive matrix factorization (PMF), and environmental impact of VOCs on O3 and secondary organic aerosol (SOA) were evaluated. The results showed that the average VOC concentration was (82.1±22.7) μg•m^-3, with alkanes being the most abundant group (51.8%), followed by aromatics (17.8%), alkenes (8.0%), and alkynes (3.8%). The diurnal variation of VOCs exhibited a bimodal trend, with twin peaks appearing at 08:00-10:00 and 18:00-20:00, falling to a valley at 12:00-14:00. The results for benzene/toluene (2.1±1.3) and isopentane/n-pentane (1.7±0.6) showed that the ambient VOCs may be influenced by coal combustion and vehicular emissions. Six sources were extracted by PMF: coal combustion (34.9%), vehicle emissions (18.2%), gasoline evaporation (15.2%), industrial emissions (13.6%), biogenic emissions (9.2%), and solvent usage (9.0%). The average concentration of ozone formation potential (OFP) was 156.6 μg•m^-3, with the highest contribution from alkenes, while the average concentration of secondary organic aerosol formation potential (SOAp) was 68.7 μg•m^-3, mainly from aromatics (93.4%). In summary, coal combustion was the most abundant source of VOCs, and accelerating the management of coal gangue and energy structure readjustment are the key points to address. Meanwhile, restricting the VOCs from vehicle emissions, gasoline evaporation, and industrial emissions is also required.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Coal combustion Controlled terms:Aerosols - Coal - Coal industry - Evaporation - Factorization - Gas chromatography - Gasoline - Industrial emissions - Ionization of gases - Olefins - Sampling - Volatile organic compounds Uncontrolled terms:Average concentration - Environmental sampling - Ionization detectors - Mass selective detectors - Ozone formation potentials - Positive Matrix Factorization - Secondary organic aerosols - Source apportionment Classification code:451.1 Air Pollution Sources - 523 Liquid Fuels - 524 Solid Fuels - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 3.80e+00%, Percentage 5.18e+01%, Percentage 8.00e+00%, Percentage 9.00e+00%, Percentage 9.20e+00%, Percentage 9.34e+01%, Percentage 1.36e+01%, Percentage 1.52e+01%, Percentage 1.78e+01%, Percentage 1.82e+01%, Percentage 3.49e+01% DOI:10.13227/j.hjkx.201912253 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796379 Title:Start-up Characteristics of SNAD Process and Functional Abundance Succession of Volcanic Rock Biological Aerated Filter Title of translation:火山岩填料曝气生物滤池的SNAD工艺启动特性及功能菌丰度演替 Authors:Xue, Jia-Jun (1, 2); Zhang, Shao-Qing (1, 3); Zhang, Li-Qiu (1, 3); Li, Shu-Geng (2, 3); Yao, Hai-Nan (1, 2); Geng, Zhong-Xuan (1, 2); Li, Hong (1, 2); Liu, Xiao-Ling (2, 3) Author affiliation:(1) School of Civil Engineering, Guangzhou University, Guangzhou; 510006, China; (2) Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou; 510006, China; (3) School of Environmental Science and Engineering, Guangzhou University, Guangzhou; 510006, China Corresponding author:Zhang, Li-Qiu(zlqiu@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2796-2804 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A SNAD(simultaneous partial nitrification, ANAMMOX, and denitrification) process initiated in a submerged biological aerated filter (SBAF) was started up by seeding nitrification sludge and an ANAMMOX filter to investigate the operating characteristics and the succession of functional bacteria. The results showed that when the autotrophic nitrogen removal and denitrification were operated stably for 67 days at an initial COD concentration of 60 mg•L^-1, the maximum nitrogen removal efficiency, the COD removal rate, and the nitrogen removal rate were 92.0%, 82.9%, and 2.3 kg•(m³•d)^-1, respectively. Moreover, the total nitrogen removal rate of the SNAD process in this study was 12.6% higher than that of CANON process. The results of quantitative PCR showed that the abundance of AOB slightly increased, while the abundance of ANAMMOX was one order higher than that before the start-up of SNAD. In comparison, the abundances of denitrifiers and NOB remained at a relatively low level (10⁷ copies•g^-1). Taken together, these results suggested that the SBAF process with volcanic filter was beneficial for the accumulation of ANAMMOX and AOB.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Nitrogen removal Controlled terms:Biofilters - Denitrification - Nitrification - Polymerase chain reaction - Volcanoes - Wastewater treatment Uncontrolled terms:Autotrophic nitrogen removal - Biological aerated filter - Nitrogen removal efficiency - Nitrogen removal rates - Operating characteristics - Partial nitrification - Start-up characteristics - Total nitrogen removal Classification code:452.4 Industrial Wastes Treatment and Disposal - 484 Seismology - 801.2 Biochemistry - 802.2 Chemical Reactions Numerical data indexing:Age 1.84e-01yr, Mass_Density 6.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.26e+01%, Percentage 8.29e+01%, Percentage 9.20e+01% DOI:10.13227/j.hjkx.201911134 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278147 Title:Microbial Diversity and Physicochemical Properties of Rhizosphere Microenvironment in Saline-alkali Soils of the Yellow River Delta Title of translation:黄河三角洲盐碱土根际微环境的微生物多样性及理化性质分析 Authors:Zhao, Jiao (1); Xie, Hui-Jun (2); Zhang, Jian (1) Author affiliation:(1) School of Environmental Science and Engineering, Shandong University, Qingdao; 266200, China; (2) Environment Research Institute, Shandong University, Qingdao; 266200, China Corresponding author:Xie, Hui-Jun(xiehuij@sdu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1449-1455 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil salinity and alkalinity are major problems that limit agricultural development across the world. The planting of halophytes and salt-tolerant plants could improve saline-alkaline soil character, while the microorganisms in saline-alkali soils play an important role in the growth of halophytes and salt-tolerant plants. In this study, four representative plants of maize, cotton, Phragmites australis (Cav.) Trin. ex Steud, and Suaeda salsa were selected in saline-alkali soil. Soil samples were collected to explore the relationship between the main bacterial communities of roots and non-roots and the physical and chemical properties and soil microbial diversity of saline-alkali soil. The results showed that the root microorganisms of Suaeda salsa affect the pH of the soil to some extent, and the soil salinity is negatively correlated with the soil nutrient content. The top five bacterial gates with higher relative abundance in all soil samples were α-Proteobacteria, Actinobacteria, Bacteroides, Chloroflexi, and Acidobacteria. Cotton, Phragmites australis (Cav.) Trin. ex Steud, and Suaeda salsa have large differences in salt-tolerant bacteria between root soils and non-root soils. High-throughput sequencing results show that salt tolerance is different between the three plant roots and non-root soils. Bacterial genus, such as Actinophytocola and Lechevalieria, differ greatly in cotton soil, Bacillus and Filobacillus differ greatly in Phragmites australis (Cav.) Trin. ex Steud. soil, and Echinicola differ greatly in the soil of Suaeda salsa. This research can provide a theoretical basis for promoting plant growth in saline-alkali soil.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Soils Controlled terms:Agricultural robots - Alkalinity - Bacteria - Bacteriology - Cotton - Forestry - Physicochemical properties - Soil surveys Uncontrolled terms:Microbial diversity - Microenvironments - Physical and chemical properties - Saline-alkali soils - Salt tolerant Classification code:483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 821.4 Agricultural Products DOI:10.13227/j.hjkx.201908044 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990465 Title:Detection Method, Distribution, and Risk Assessment of Pharmaceuticals and Personal Care Products in the Yellow Sea and the East China Sea Title of translation:典型药物及个人护理品在黄东海海域水体中的检测, 分布规律及其风险评估 Authors:Chen, Xian (1); Zhang, Cai-Jie (1); Yang, Gui-Peng (1); Zhang, Jing (1); Liu, Meng (1) Author affiliation:(1) College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao; 266000, China Corresponding author:Zhang, Jing(zhangjouc@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:194-204 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:At present, research findings on pharmaceuticals and personal care products (PPCPs) in coastal areas are still unclear, and there is a need to develop a method to detect more PPCPs simultaneously in seawater. In this study, nine compounds of non-steroidal anti-inflammatory drugs, antibiotics, lipid regulators. and stimulants were selected as analytes. Solid phase extraction (SPE) was used to extract the compounds, which were then analyzed by high-performance liquid chromatography coupled to mass spectrometry (HPLC-MS). The optimum experimental conditions, such as the filler, eluent, pH, flow rate, and the reduction of matrix effect were optimized during the SPE. The results showed that the best extraction column was CNW HLB, the best eluent was methanol: acetonitrile (1:1, volume ratio), the best eluent volume was 6 mL, the best pH was 7, the best flow rate was 5 mL•min^-1, the amount of EDTA-Na2 added was 1 g, and the best concentration multiple was 500. The linear regression equations of all PPCPs had good linearity. Correlation coefficients were>0.999, recovery rates were between 82%-106%, relative standard deviations were between 1.6%-14%, and detection limits were between 0.01-2 ng•L^-1, thus satisfying the requirement of trace analysis in seawater. Distribution characteristics and sources of PPCPs were studied in the Yellow Sea and the East China Sea during summer 2018. All nine PPCPs were detected and the main pollutants were NAP, IBU, GEM, CAF, and ASA. High concentrations of PPCPs were generally detected in the nearshore area and displayed conspicuous decreasing tendencies from the inshore towards the offshore. The concentrations of PPCPs in the Yellow Sea were higher than of those in the East China Sea, and this was related to there being more sources of pollutions and poor water exchange capacity in the Yellow Sea. Principal component analysis showed that the main source of PPCPs was terrestrial input. The environmental risk assessment of PPCPs indicated that risk quotients (RQs) of IBU and NAP (0.1-1) posed a medium risk to the aquatic environment, while others posed low risk to organisms.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Risk assessment Controlled terms:Antibiotics - Aquatic organisms - Extraction - High performance liquid chromatography - Mass spectrometry - Offshore oil well production - Phase separation - Seawater - Trace analysis - Water pollution Uncontrolled terms:Correlation coefficient - Distribution characteristics - Environmental risk assessment - Experimental conditions - Linear regression equation - Non-steroidal anti-inflammatory drugs - Pharmaceuticals and personal care products - Relative standard deviations Classification code:453 Water Pollution - 461.6 Medicine and Pharmacology - 471 Marine Science and Oceanography - 471.4 Seawater, Tides and Waves - 511.1 Oil Field Production Operations - 801 Chemistry - 802.3 Chemical Operations - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass 1.00e-03kg, Mass_Density 1.00e-11kg/m3 to 2.00e-09kg/m3, Percentage 1.60e+00% to 1.40e+01%, Percentage 8.20e+01% to 1.06e+02%, Volume 6.00e-06m3 DOI:10.13227/j.hjkx.201907028 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517455 Title:Factors Influencing New Atmospheric Particle Formation in Ordos During Summer and Autumn 2019 Title of translation:鄂尔多斯市夏秋季气溶胶新粒子生成过程影响因素分析 Authors:Kong, Xiang-Chen (1, 2); Wang, Hong-Lei (2); Zhang, Lian-Xia (1); Hu, Qun (1); Li, Rui-Feng (1); Xu, Cai-Qin (1) Author affiliation:(1) Ordos Meteorological Bureau of Inner Mongolia, Ordos; 017000, China; (2) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Wang, Hong-Lei(hongleiwang@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5295-5305 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the aerosol number size distribution in the range of 10 nm-10 μm was collected from August 16 to October 04, 2019 at Ordos using a wide-range particle spectrometer (WPS). Combined with PM (PM2.5 and PM10), pollution gases, meteorological data, and the HYSPLIT model, the characteristics and impact factors of new particle formation (NPF) were discussed. The results indicated that there were 19 NPF events during the observation period, which have different effects on diurnal variation in aerosol number concentration in different modes. The NPF events caused a sharp increase in the number concentration of nucleation and Aitken mode aerosols, but had little effect on the number concentration of accumulation and coarse mode aerosols. The temperature, wind speed, and total solar radiation during NPF days were usually higher than those in non-NPF days, and the RH during NPF days was lower. On NPF days, the mass concentrations of PM2.5, PM10, CO, and NO2 were lower than those on non-NPF days, while the mass concentrations of O3 and SO2 were higher. NPF events were observed in 40.0% of northern air masses and 29.6% of southern air masses. There were significant differences in meteorological elements in different NPF event air mass types. The southern NPF event air mass type had the lowest wind speed and the highest RH, with averages of (2.4±1.5) m•s^-1and (48.8±10.8)%, respectively. The northern NPF event air mass type had the highest wind speed and total solar radiation, with averages of (4.2±1.9) m•s^-1 and (664.5±255.6) W•m^-2, respectively. The western air mass type of NPF event had the lowest RH, with an average of (29.8±12.7)%. The formation rates of new particles in the different air mass types of NPF events were similar, ranging from 1.5 to 1.8 cm^-3•s^-1. The largest growth rate was (12.7±13.6) nm•h^-1 in the southern NPF event air mass type, which was 1.2 times and 1.4 times higher than the NPF events of northern air masses and western air masses.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Growth rate Controlled terms:Aerosols - Meteorology - Solar radiation - Sulfur dioxide - Wind Uncontrolled terms:Aerosol number size distribution - Atmospheric particles - Mass concentration - Meteorological data - Meteorological elements - New particle formation - Number concentration - Observation Period Classification code:443.1 Atmospheric Properties - 657.1 Solar Energy and Phenomena - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.96e+01%, Percentage 4.00e+01%, Size 1.00e-08m to 1.00e-05m DOI:10.13227/j.hjkx.202004212 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517631 Title:Analysis of Industrial VOCs Emission Inventory and Countermeasures in Xiamen Title of translation:厦门市工业源VOCs排放清单及控制对策分析 Authors:Wu, Dong-Yang (1); Zhuang, Ma-Zhan (2); Wu, Yan-Cong (2); Jin, Lei (1); Wu, Yi-Cheng (1); Gao, Pan-Feng (1); Liu, Jian-Fu (1); Jin, Yue-Zheng (1); Pan, Ya-Lei (1); Fu, Hai-Yan (1) Author affiliation:(1) Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen; 361024, China; (2) Xiamen Academy of Environmental Sciences, Xiamen; 361021, China Corresponding author:Fu, Hai-Yan(fuhy@xmut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5336-5344 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on data from industrial activities and environmental surveys in the six districts of Xiamen, the emission inventory of industrially sourced volatile organic compounds (VOCs) from eight industries in the six districts of Xiamen was calculated for 2019 by applying the emission factor analysis method. The spatial distribution pattern of VOC emission intensity in the six districts of Xiamen was analyzed. VOCs treatment technologies applied in the industries in the VOCs emission inventory were analyzed and countermeasures for improving VOC control were proposed based on the survey of the industries. The results showed that the total VOCs production and VOCs emission from industrial sources in Xiamen was 16 027.88 t and 5 514.58 t in 2019, respectively. Among them, the VOCs emission from Haicang, Tong'an, Xiang'an, and Jimei districts outside Xiamen Island were 1 648.35, 2 111.13, 667.52, and 750.48 t, respectively. Fewer VOC emissions from Xiamen Island were observed, which included 292.42 and 44.68 t from Huli and Siming districts, respectively. Except for the Huli District, the spatial distribution of emissions showed a spatial characteristic that the VOCs emission intensities outside Xiamen Island are higher than that of Xiamen Island. Among the eight industries in Xiamen, VOCs emissions were mainly from coating, printing, chemical, and rubber industries, which accounted for 51.21%, 20.18%, 13.63%, and 10.67%, respectively, of the total emissions. The analytic results of the VOCs waste gas disposal technique in Xiamen indicate that, from the perspective of source control, enterprises can effectively control the generation and emission of the VOCs at the source by using low (zero) raw materials. For the terminal disposal procedure, the actual disposal efficiency of UV photolysis/photocatalysis, low-temperature plasma, and biological methods are all lower than 80%, and that of the combined technique of adsorption and catalytic combustion, and the combustion method are both higher than 90%.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Industrial emissions Controlled terms:Catalysis - Photolysis - Rubber industry - Spatial distribution - Surveys - Temperature - Volatile organic compounds - Waste disposal - Waste incineration Uncontrolled terms:Catalytic combustion - Distribution of emissions - Environmental surveys - Industrial activities - Low temperature plasmas - Spatial characteristics - Spatial distribution patterns - Treatment technologies Classification code:451.1 Air Pollution Sources - 452.4 Industrial Wastes Treatment and Disposal - 641.1 Thermodynamics - 802.2 Chemical Reactions - 804.1 Organic Compounds - 818.4 Rubber Factories and Machinery - 921 Mathematics Numerical data indexing:Percentage 1.07e+01%, Percentage 1.36e+01%, Percentage 2.02e+01%, Percentage 5.12e+01%, Percentage 8.00e+01%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202003245 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517626 Title:Effects of Selected Biochars Application on the Microbial Community Structures and Diversities in the Rhizosphere of Water Spinach (Ipomoea aquatica Forssk.) Irrigated with Reclaimed Water Title of translation:生物质炭施用对再生水灌溉空心菜根际微生物群落结构及多样性的影响 Authors:Cui, Bing-Jian (1, 2); Cui, Er-Ping (1, 2); Hu, Chao (1, 2); Fan, Xiang-Yang (1, 2); Gao, Feng (1, 2) Author affiliation:(1) Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang; 453002, China; (2) Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources, Chinese Academy of Agricultural Sciences, Xinxiang; 453002, China Corresponding author:Gao, Feng(gaofengcaas@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5636-5647 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The utilization of reclaimed water is one of the most important ways of alleviating the shortage of water resources for agricultural irrigation. As an effective disposal method for biomass waste, biochar has been widely used in the improvement and remediation of agricultural environments. However, few studies have been performed on the effects of biochar application on microbial community structures and pathogen abundances in rhizosphere soils irrigated with reclaimed water. Based on a pot experiment, high throughput sequencing technology and quantitative polymerase chain reaction (PCR) methods were used to investigate the effects of different biochars on the microbial community structure and diversity and pathogen abundance of rhizosphere soils irrigated with reclaimed water. The results showed that four different types of biochars had different effects on the soil nutrient status. Rice hull-derived biochar and rice straw-derived biochar resulted in significantly increased soil pH with reclaimed water irrigation, while peanut shell-derived biochar, rice straw-derived biochar, and wheat straw-derived biochar significantly increased EC values (P<0.05). The Sobs index, Shannon index, and Chao1 index of bacterial community in the rhizosphere soil significantly increased with rice straw-derived biochar treatment, while the Simpson index significantly decreased by adding peanut shell-derived biochar, rice hull-derived biochar, and wheat straw-derived biochar (P<0.05). There were differences in the relative abundances of bacterial communities in rhizosphere soils under different treatments. The dominant taxonomic groups at the phylum level were Proteobacteria, Actinobacteria, Chloroflexi, Bacteroidetes, and Acidobacteria. The dominant genera included Pseudomonas, Rheinheimera, Arthrobacter, Sphingomonas, and Aeromonas (relative abundance>5%). Redundancy (RDA) and heatmap analyses showed that the diversities and compositions of bacterial communities in rhizosphere soils in different treatments were closely related to soil EC values, organic matter, total nitrogen, and cadmium contents. Biochar application had no significant effect on the abundances of Aeromonas hydrophila and Bacillus cereus. Rice straw-derived biochar and peanut shell-derived biochar could significantly reduce the γ-Proteobacteria, while rice hull-derived biochar and wheat straw-derived biochar could significantly reduce the relative abundance of AOA (P<0.05). In conclusion, there were no obvious negative effects observed from reclaimed water irrigation on soil quality. Biochar application not only significantly improved the physicochemical properties of the soil, but also impacted the bacterial community structure and the abundance of the functional bacteria in the rhizosphere soil, which was closely related to the soil properties.
© 2020, Science Press. All right reserved. Number of references:58 Main heading:Soils Controlled terms:Agricultural robots - Bacillus cereus - Bacteriology - Irrigation - Oilseeds - Physicochemical properties - Polymerase chain reaction - Reclamation - Straw - Waste disposal - Water resources Uncontrolled terms:Aeromonas hydrophila - Agricultural environments - Agricultural irrigation - Bacterial community structure - Different treatments - High-throughput sequencing - Microbial community structures - Quantitative polymerase chain reaction methods Classification code:444 Water Resources - 452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 483.1 Soils and Soil Mechanics - 801.2 Biochemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202006087 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952822 Title:Accurate Identification of Ambient VOCs Emission Sources in an Industrial Park Using On-Line Monitoring Data Title of translation:基于环境空气中VOCs在线监测数据精准识别化工园区VOCs排放源 Authors:Sun, Jia-Ning (1); Xie, Shao-Dong (1) Author affiliation:(1) College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China Corresponding author:Xie, Shao-Dong(sdxie@pku.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4874-4884 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To accurately identify and locate ambient volatile organic compounds(VOCs)emission sources in industrial parks, a continuous online GC-FID method was used to monitor 43 kinds of VOCs on an hourly basis during January 2017 at five sites in an industrial park. A statistical analysis and a PMF model were used to analyze the sources of VOCs, and by combining with CPF and enterprise emission information, the location of each pollution source was accurately identified. The average VOCs concentration was 56.40×10^-9 and the highest concentration of alkanes was observed at four sites, with the exception of one site. Ethane, propane, ethylene, toluene, isobutane, n-butane, and acetylene were the main contributors. Ambient VOCs in the park mainly derives from five sources: urban transmission, butane leakage, process emissions, storage tank emissions, and ethylene synthesis. The enterprises in the zone B1, A1-A3, C1-C2, F4, E4-E6, F4-F6, and the canal loading and unloading area are the main emission areas of the pollution sources. Using online monitoring data, the research combined a PMF model, meteorological conditions, and corporate emissions information to achieve precise positioning of the pollution sources of VOCs in the industrial park, thus providing a basis for the supervision and management of corporate emissions in industrial parks.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Industrial emissions Controlled terms:Aliphatic compounds - Butane - Digital storage - Ethylene - Industrial research - Monitoring - Pollution - Unloading - Volatile organic compounds Uncontrolled terms:Ethylene synthesis - Loading and unloading - Meteorological condition - Online monitoring - Pollution sources - Precise positioning - Process emissions - Storage tank emissions Classification code:451.1 Air Pollution Sources - 691.2 Materials Handling Methods - 722.1 Data Storage, Equipment and Techniques - 804.1 Organic Compounds - 901.3 Engineering Research DOI:10.13227/j.hjkx.202002002 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861817 Title:Source Profiles of Industrial Emission-Based VOCs in Chengdu Title of translation:成都市工业挥发性有机物排源成分谱 Authors:Zhou, Zi-Hang (1); Deng, Ye (1); Zhou, Xiao-Ling (1); Wu, Ke-Ying (1); Tan, Qin-Wen (1); Yin, Dai-Juan (2); Song, Dan-Lin (1); Chen, Qiu-Yu (1); Zeng, Wen-Hao (1) Author affiliation:(1) Chengdu Key Laboratory of Air Pollution Research, Chengdu Academy of Environmental Sciences, Chengdu; 610072, China; (2) Sichuan Tonsin Testing Corporation, Chengdu; 610046, China Corresponding author:Tan, Qin-Wen(tanqw@cdaes.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3042-3055 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The volatile organic compound (VOC) emission characteristics of various production procedures were analyzed through GC-MS after the emissions of typical enterprises such as automobile manufacturing, petrochemical, and other industries had been sampled with SUMMA canisters. Each production procedure in the automobile manufacturing and petrochemical industries was considered. The results showed that each automobile manufacturing procedure had its own dominant species, and alkanes (32%) and aromatics (35%) were the main emission species of coating spraying. The emission characteristics of furniture manufacturing were highly correlated with the raw materials, and the VOC emission species were mainly composed of aromatics (50%) and oxygenated VOCs (OVOCs) (38%). As for the petrochemical industry, VOC concentrations in various process plant areas ranged from 49 μg•m^-3 to 1 387 μg•m^-3. As the main products of the refining area were C5-C9 gasoline and benzene series, whereas comparatively more solvents were used in the chemical area, which would generate alkene products, VOC concentrations greatly differed in the various process plant areas. In terms of electronic manufacturing, OVOCs were the main emission species, accounting for more than 50% of total VOCs. Alkanes and OVOCs were the main contributors to VOC emissions in shoemaking, accounting for 52% and 36% on average, respectively, which was strongly related to the species of the used solvents. The VOC emission species of automobile manufacturing were quite different, predominantly including n-dodecane and 2-butanone. The emission species of furniture manufacturing mainly included styrene, ethyl acetate, m/p-xylene, etc., which are typical species of coatings and diluents. As for the differences in the emission species of process plant areas in the petrochemical industry, styrene was the main species in the refining area, 1,3-butadiene in the chemical area, C3-C5 alkanes in the storage area, and C6-C8 alkanes in the wastewater treatment area. The main emission species of electronic manufacturing were ethanol, acetone, and other aldehyde ketone species. The emission species of shoemaking enterprises are mainly C5 and C6 alkanes. According to the results of ozone formation potential (OFP), alkenes and aromatics were the main VOC emission species that contribute significantly to the OFP in the automobile manufacturing and petrochemical industries, with relatively high pollution source reaction activity. The results showed that the emission ratio (17%-96%) and OFP contributions of OVOCs were significant in various industries. Therefore, for VOC emission control, in addition to focusing on the control of aromatics and alkenes, attention should also be paid to OVOCs.
© 2020, Science Press. All right reserved. Number of references:57 Main heading:Automotive industry Controlled terms:Acetone - Aromatization - Automobile manufacture - Automobiles - Benzene refining - Coatings - Electronics industry - Emission control - Furniture manufacture - Gasoline refining - Olefins - Paraffins - Petrochemical plants - Petrochemicals - Sewage treatment plants - Styrene - Volatile organic compounds - Wastewater treatment Uncontrolled terms:Automobile manufacturing - Electronic manufacturing - Emission characteristics - Furniture manufacturing - Ozone formation potentials - Petrochemical industry - Production procedure - Volatile organic compound (VOC) Classification code:451.2 Air Pollution Control - 452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 523 Liquid Fuels - 662.1 Automobiles - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions - 804.1 Organic Compounds - 813.2 Coating Materials Numerical data indexing:Percentage 1.70e+01% to 9.60e+01%, Percentage 3.20e+01%, Percentage 3.50e+01%, Percentage 3.60e+01%, Percentage 3.80e+01%, Percentage 5.00e+01%, Percentage 5.20e+01% DOI:10.13227/j.hjkx.201912203 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795590 Title:Low Temperature Ammonia Nitrogen Removal from an Iron, Manganese, and Ammonia Groundwater Purification Process with Different Concentrations of Iron and Manganese Title of translation:不同铁锰浓度的低温铁锰氨地下水净化中氨氮去除途径 Authors:Zhang, Jie (1, 2); Mei, Ning (1); Liu, Meng-Hao (1); Ye, Xue-Song (2); Li, Dong (1) 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:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2727-2735 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In a groundwater plant, removal of iron, manganese, and ammonia nitrogen was performed via a purification process using a filter column at a low temperature (5-6℃). Iron, manganese and ammonia [Fe(Ⅱ) 0-19.26 mg•L^-1, Mn(Ⅱ) 0.52-2.05 mg•L^-1, and NH4⁺-N 0.37-2.59 mg•L^-1] were analyzed to explore the ammonia nitrogen removal efficiency under different iron and manganese concentrations. The results showed that when the concentration of manganese in the inlet water was maintained at approximately 0.6 mg•L^-1 and the concentration of ferrous iron in the inlet water was increased, with the increase of iron oxides in the filter layer, the ratio of ammonia nitrogen removed by adsorption of iron oxides increased, while the ratio of ammonia nitrogen removed by nitrification will decreased and adsorption preceded nitrification. When the concentration of ferrous iron in the water was maintained at approximately 8 mg•L^-1and 11 mg•L^-1, and the concentration of manganese in the water was increased, the proportion of ammonia nitrogen removed by adsorption did not increase with the increase of manganese oxide, and the removal route of ammonia nitrogen hardly changed. This is because less manganese oxides were formed 20 cm before the filter layer, which had little effect on the ammonia nitrogen adsorbed in this range. The production area of manganese oxides was concentrated below 20 cm of the filter layer, and most ammonia nitrogen was removed by adsorption and nitrification before this area, and the manganese oxides in this area did not adsorb ammonia nitrogen.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Chemicals removal (water treatment) Controlled terms:Adsorption - Ammonia - Denitrification - Groundwater - Iron oxides - Manganese oxide - Nitrification - Nitrogen removal - Passive filters - Purification - Temperature Uncontrolled terms:Ammonia nitrogen - Ammonia nitrogen removal - Filter columns - Filter layers - Low temperatures - Manganese concentration - Production area - Purification process Classification code:444.2 Groundwater - 641.1 Thermodynamics - 703.2 Electric Filters - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 1.93e-02kg/m3, Mass_Density 1.10e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.20e-04kg/m3 to 2.05e-03kg/m3, Mass_Density 6.00e-04kg/m3 to 2.20e-02kg/m3, Size 2.00e-01m DOI:10.13227/j.hjkx.201912111 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408370488 Title:Analysis of Water Quality Change and Its Driving Factors of the Xiaoqing River Estuary in Recent Ten Rears Title of translation:小清河入海口近十年水质变化及驱动因素分析 Authors:Fan, Xin-Feng (1, 2, 3); Han, Mei (2); Wang, Lei (1, 3, 4); Li, Xiu-Ping (1); Zhou, Jing (1) Author affiliation:(1) Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) College of Geography and Environment, Shandong Normal University, Ji'nan; 250014, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Sciences, Beijing; 100101, China Corresponding author:Han, Mei(hanmei568568@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1619-1628 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:According to the monitoring data of pollutant concentration in the Xiaoqing River estuary from 2008 to 2017, 13 pollutants affecting water quality were selected. The trends of changes in water quality were identified mainly by the pollution index method, and the driving factors affecting water quality changes were quantitatively and qualitatively analyzed by the Spearman and Pearson correlation analysis method and the principal component analysis. The results showed that the water quality of the Xiaoqing River estuary was improved and the pollution was greatly reduced from 2008 to 2017. The pollution factors were still above the limits to varying degrees; COD and petroleum were the most serious pollutants, TP came second, and the remaining pollutants basically met the water quality standards of the Ⅲ. The pollution degree of petroleum, COD, NH4⁺-N, NO2^--N, and As showed an overall downward trend, and the pollution degree of TP, NO3^--N, Cu, Pb, Zn, Cd, Hg, and Cr⁶⁺ showed an upward trend to different degrees. Social and economic factors were the main driving factors affecting the water quality of the Xiaoqing River. The discharge of pollutants and the changes in land use type led to serious water pollution overall in the Xiaoqing River, whereas the improvement of sewage treatment rate and the implementation of water environmental protection policy were the main factors affecting the water quality improvement of the Xiaoqing River. Natural factors were the secondary driving factors affecting the water quality of the Xiaoqing River. Climate and hydrological factors, such as temperature, sunshine duration, precipitation, and instantaneous runoff, also indirectly affected the water quality to different degrees.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:River pollution Controlled terms:Correlation methods - Estuaries - Factor analysis - Gasoline - Land use - Quality control - Rivers - Sewage treatment - Water quality Uncontrolled terms:Land use type - Pearson correlation analysis - Pollutant concentration - Pollutant emission - Pollution index - Water environmental protection - Water quality improvements - Xiaoqing rivers Classification code:403 Urban and Regional Planning and Development - 407.2 Waterways - 445.2 Water Analysis - 452.2 Sewage Treatment - 453 Water Pollution - 523 Liquid Fuels - 913.3 Quality Assurance and Control - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.201909074 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278122 Title:Water Sources and Factors Controlling Hydro-chemical Compositions in the Yiluo River Basin Title of translation:伊洛河流域河水来源及水化学组成控制因素 Authors:Liu, Song-Tao (1); Zhang, Dong (1); Li, Yu-Hong (1); Yang, Jin-Mei (1); Zou, Shuang (1); Wang, Yong-Tao (1); Huang, Xing-Yu (1); Zhang, Zhong-Yi (2); Yang, Wei (1); Jia, Bao-Jun (1) Author affiliation:(1) School of Resources and Environment, Henan Polytechnic University, Jiaozuo; 454000, China; (2) Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution, East China University of Technology, Nanchang; 330013, China Corresponding author:Zhang, Dong(zhangdong@hpu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1184-1196 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An important tributary in the middle stream of the Yellow River, the Yiluo River consists of the Luohe River and Yihe River, which converge at Yanshi City. Mining activities were widely distributed in the upstream of the Yiluo River Basin (YRB), while residential areas concentrated in the downstream were coupled with extensively industrial and agricultural activities. To illustrate the influences of variable anthropogenic activities on the hydro-chemical composition of river water of the YRB, water samples from the main stream and tributaries were collected in the flood season (August) and normal season (December), respectively. The hydrogen and oxygen isotope values coupled with cation and anion content were analyzed. Temporal and spatial variations of hydrogen and oxygen isotopes and ion content were utilized to elucidate the sources and factors controlling the hydro-chemical composition of the river water, and to illustrate the pathways of human effects. The results demonstrated that: ① Average hydrogen and oxygen isotope values (δD and δ¹⁸O) of Luo River water were -56‰ and -7.9‰, and -55‰ and -8.1‰ in the flood season and normal season, respectively. Mean δD and δ¹⁸O values of Yi River water were -49‰ and -6.9‰, and -53‰ and -7.8‰ in the flood season and normal season, respectively. These temporal variations indicated that river water was mainly recharged by local atmospheric precipitation. ② The dominant water hydro-chemical type was HCO3-SO4-Ca-Mg in the main stream of the YRB, and the ratios of Ca²⁺ and HCO3^- molar equivalent concentrations in the flood season were lower than those in the normal season, while the ratios of SO4^2- molar equivalent concentrations were higher than those in the normal season, indicating more sulfate dissolved in the river water in the flood season. ③ Carbonic acid and sulfuric acid simultaneously reacted with carbonate and silicate rocks, and in the Luo River more carbonate rocks were weathered, while in the Yi River more silicate rocks were weathered. ④ Human effects on river water were mainly concentrated in the upstream where wastewater input was derived from mining activities, while in the downstream pollution of the river was due to industrial wastewater and sewage input. ⑤ Spatial variations of sulfate sulfur isotope values were mostly due to differences between anthropogenic activities in the upstream and downstream of the Yiluo River. Negative sulfur isotope values in the upstream river water confirmed dissolved sulfate from sulfide mineral oxidation, which also indirectly verified the rock chemical weathering by sulfuric acid in this area. Positive sulfur isotope values in downstream river water were connected with industrial wastewater and sewage.
© 2020, Science Press. All right reserved. Number of references:58 Main heading:Rivers Controlled terms:Agricultural robots - Carbon dioxide - Complexation - Floods - Hydrogen - Isotopes - Molar concentration - Molar ratio - Oxygen - River pollution - Rocks - Sewage - Silicate minerals - Sulfur - Sulfur compounds - Sulfuric acid - Watersheds - Weathering Uncontrolled terms:Anthropogenic inputs - Chemical compositions - Controlling factors - River basins - Temporal and spatial variation Classification code:444.1 Surface Water - 452.1 Sewage - 453 Water Pollution - 482.2 Minerals - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201908116 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070260 Title:Spatio-temporal Evolution and Relationship of Water Environment Quality and Phytoplankton Community in Wenyu River Title of translation:温榆河水环境质量与浮游植物群落结构的时空变化及其相互关系 Authors:Zhu, Li-Ying (1, 2); Chen, Yuan-Yuan (2, 3); Liu, Jing (4); Wang, Ya-Wei (2); Wang, Chun-Rong (1); Wei, Yuan-Song (2, 5, 6); Zhang, Yu-Xin (4) Author affiliation:(1) School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing; 100083, 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) School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou; 221116, China; (4) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (5) Laboratory of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (6) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Wei, Yuan-Song(yswei@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:702-712 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Wenyu River is an important ecological corridor of Beijing. In this study, the spatio-temporal dynamics of water quality and phytoplankton community in the Wenyu River in 2006, 2011, and 2018, as well as their relationship were thoroughly analyzed by historical data analysis and field surveys. Results show that the water quality in the Wenyu River improved significantly from serious pollution owing to pollution containment. The major water pollutant has shifted from ammonia nitrogen (NH4⁺-N) to total nitrogen (TN). Compared with 2011, the average multiple of NH4⁺-N and total nitrogen TN exceeding the national standard were reduced by factors of 0.29-0.33 and 2.77-2.39, respectively, in 2018. The average concentration of NH4⁺-N and TN decreased from 15.52-19.16 mg•L^-1 and 20.21-19.58 mg•L^-1 in 2011 to 1.93-2.66 mg•L^-1 and 5.66-6.79 mg•L^-1 in 2018. Moreover, dissolved oxygen (DO) and NH4⁺-N concentrations in the Wenyu River and its tributaries, the Qinghe River, almost met requirements of their water function zoning target. Corresponding with the water quality improvement, the phytoplankton and community species increased dramatically. Phytoplankton species increased from 6 to 8 phyla, as well as community species. The dominant species changed from Chlorophyta in 2006 to the Cyanophyta in 2011, then to Bacillariophyta in 2018. The Shannon-Wiener diversity index (H') and evenness Pielou index (J) had improved. However, the major dominant species such as Cyclotella and Melosira persisted, and the Wenyu River was still in the eutrophication state in 2018. Statistical analysis results indicated that Cyanophyta, Bacillariophyta, and other algae abundance were significantly correlated with DO, pH, NH4⁺-N, TN, and TP.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:River pollution Controlled terms:Ammonia - Biochemical oxygen demand - Biodiversity - Dissolved oxygen - Eutrophication - Nitrogen - Phytoplankton - Quality control - Rivers - Water quality Uncontrolled terms:Average concentration - Biodiversity indexes - Phytoplankton community - Shannon-wiener diversity indices - Spatio-temporal dynamics - Spatiotemporal evolution - Water environments - Water quality improvements Classification code:445.2 Water Analysis - 453 Water Pollution - 454 Environmental Engineering - 471 Marine Science and Oceanography - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Mass_Density 1.55e-02kg/m3 to 1.92e-02kg/m3, Mass_Density 1.93e-03kg/m3 to 2.66e-03kg/m3, Mass_Density 2.02e-02kg/m3 to 1.96e-02kg/m3, Mass_Density 5.66e-03kg/m3 to 6.79e-03kg/m3 DOI:10.13227/j.hjkx.201906207 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071333 Title:Effects of Biochar Input on Changes of Available Nutrient Elements in Riparian Soils with Different Landuse Types Title of translation:生物炭输入对不同滨岸带土壤营养元素有效态变化的影响 Authors:Zhou, Hui-Hua (1); Yuan, Xu-Yin (1); Xiong, Yu-Ting (1); N., Han; H.-M., Ye; Y.-Z., Chen 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:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:914-921 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Biochar, as a new environmentally friendly material, has been used to improve soil quality and for pollution remediation. Biochar input has a significant impact on available nutrients in the soil. Based on the different land use types (forestland, grassland, cultivated land, and barren land) in the riparian zone of Taihu Lake, the effects of biochar application on the available content of nutrients in different land use types of soil were compared, and the dynamics of nutrient change was also discussed. Results show that the addition of biochar can significantly affect the available nutrient content in riparian soil, however the influential degrees for carbon, nitrogen, and phosphorus were different. After the input of biochar, dissolved organic carbon in riparian soils showed a clear downward trend, while the available nitrogen increased slightly, and the available phosphorus increased significantly. For woodland, grassland, arable land and wasteland soils, the contents of dissolved organic carbon decreased by 33.3%, 27.4%, 29.5%, and 51.4%, while the contents of available nitrogen increased by 10.8%, 18.2%, 16.4%, and 15.2%, and the contents of available phosphorus increased by 40.0%, 50.2%, 34.0%, and 43.6%, respectively. Compared with the concentrations between the control group soil (CK) and the biochar additive group soil (BC), the concentrations of dissolved organic carbon and available phosphorus exhibited large differences between the two groups regarding available nitrogen concentrations. Among the four types of riparian soils, the effects of biochar on the availability of different nutrients were different.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Soil pollution Controlled terms:Dissolution - Forestry - Land use - Nitrogen - Nutrients - Organic carbon - Phosphorus - Soils - Stream flow Uncontrolled terms:Available nitrogen - Available nutrients - Available phosphorus - Bio chars - Different land use types - Dissolved organic carbon - Nutrient elements - Riparian zones Classification code:403 Urban and Regional Planning and Development - 407.2 Waterways - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.08e+01%, Percentage 1.52e+01%, Percentage 1.64e+01%, Percentage 1.82e+01%, Percentage 2.74e+01%, Percentage 2.95e+01%, Percentage 3.33e+01%, Percentage 3.40e+01%, Percentage 4.00e+01%, Percentage 4.36e+01%, Percentage 5.02e+01%, Percentage 5.14e+01% DOI:10.13227/j.hjkx.201909006 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070504 Title:Simultaneous Quantitative Detection of Thirteen Common Antibiotics in Leafy Vegetables by Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry Title of translation:超高效液相色谱串联质谱法同时测定叶菜中13种抗生素 Authors:Chen, Qian (1); Liu, Yang (1); Xiao, Li-Jun (2); Zou, De-Yu (3); Liu, Hai-Xue (2); Wu, Hui-Hui (1) Author affiliation:(1) College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin; 300384, China; (2) College of Agronomy & Resources and Environment, Tianjin Agricultural University, Tianjin; 300384, China; (3) Tianjin Institute of Plant Protection, Tianjin; 300384, China Corresponding author:Liu, Hai-Xue(hxliu1965@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:952-961 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An analytical approach was developed to simultaneously determine 13 antibiotics in sulfonamides, quinolones, and macrolides in leafy vegetables by ultra-performance liquid chromatography coupled with triple quadrupole mass spectrometry (UPLC-MS/MS). After optimizing extracted solutions, purification methods, and eluents of antibiotics in vegetable substrates, and taking into account the influence of environmental changes and experimental conditions on the results, the optimal experimental scheme was determined. This involved ①weighing 500 mg of vegetable samples and adding 20 mL of methanol-Mcllvaine- Na2EDTA solution; ② conducting ultrasonic and centrifugal extraction three times; ③ Allowing rotary evaporation to 20 mL to pass a HLB solid phase extraction column; ④ Eluting the extraction column using 6 mL of methanol, upon which the eluent was dried almost completely; ⑤ Re-dissolving the eluent with a mixed solution of acetonitrile: water (volume ratio of 2: 8); ⑥ Detecting by UPLC-MS/MS after centrifugation and filtering. Phase A and B of UPLC-MS/MS used an aqueous solution of 1‰ formic acid and acetonitrile, respectively to conduct gradient elution. Results showed that when the pakchoi spiked at 300 ng•g^-1, the spiked recoveries of 13 antibiotics were 38.05%-96.97%. At 150 ng•g^-1, the spiked recoveries were 34.52%-111.10%. At 50 ng•g^-1, the recoveries of standard addition were 41.75%-107.13%, and the relative deviation (RSD) values were all below 8.68%. The detection limit was 0.4-1 ng•g^-1, and the limit of quantification was 1.5-3 ng•g^-1. This demonstrated good extraction and recovery efficiency on different types of leafy vegetables, and presented a good analytical application effect. The antibiotic residues were detected in four kinds of leafy vegetables in found in markets. The total content ranged from 1.59 ng•g^-1 to 32.01 ng•g^-1, and the antibiotic content in samples was calculated by dry weight. The content of antibiotics in pakchoi was the highest, followed by Chinese cabbage, lettuce, and coriander. Among the antibiotics detected, sulfadimidine was the most abundant from the selected leafy vegetables. The content of antibiotics was very low, however the potential health risks caused by long-term consumption could not be ignored.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Extraction Controlled terms:Acetonitrile - Amides - Antibiotics - Centrifugation - Filtration - Health risks - High performance liquid chromatography - High pressure liquid chromatography - Liquids - Mass spectrometry - Methanol - Phase separation - Recovery - Sulfur compounds - Thermal processing (foods) - Ultrasonic applications - Vegetables Uncontrolled terms:Detection methods - Influence of environmental changes - Leafy vegetables - Limit of quantifications - Solid-phase extraction columns - Triple-quadrupole mass spectrometry - Ultra performance liquid chromatography - Ultra-high performance liquid chromatographies Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 753.3 Ultrasonic Applications - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 821.4 Agricultural Products - 822.2 Food Processing Operations Numerical data indexing:Mass 5.00e-04kg, Percentage 3.45e+01% to 1.11e+02%, Percentage 3.80e+01% to 9.70e+01%, Percentage 4.18e+01% to 1.07e+02%, Percentage 8.68e+00%, Volume 2.00e-05m3, Volume 6.00e-06m3 DOI:10.13227/j.hjkx.201907101 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608862025 Title:Effects of Foliar Spraying of 2,3-dimercaptosuccinic Acid on Cadmium Uptake, Transport, and Antioxidant System in Rice Seedlings Title of translation:叶面喷施2,3-二巯基丁二酸对水稻幼苗镉吸收转运及抗氧化系统的影响 Authors:Yang, Xiao-Rong (1); Huang, Yong-Chun (1); Liu, Zhong-Qi (1); Huang, Yi-Zong (1); Cheng, Liu-Long (1); Zhang, Chang-Bo (1) Author affiliation:(1) Research Center of Agro-Environmental Remediation, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China Corresponding author:Huang, Yong-Chun(nylab@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3441-3448 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Rice contaminated by Cd has aroused widespread public concern. It is of great importance to find effective ways to reduce Cd translocation from roots to shoots and alleviate Cd stress in rice to ensuring food quality and safety. In this study, 2,3-dimercaptosuccinic acid (DMSA) was sprayed onto the leaves of rice seedlings to evaluate the feasibility of DMSA reducing Cd translocation to rice shoots and alleviating Cd stress. Therefore, seedlings of Zhongzao 35, one of the main rice cultivars in southern China, were used to study the effects of different concentrations of DMSA on the uptake and transport of Cd in rice seedlings by hydroponics. The effects of DMSA on MDA and GSH content, and activities of antioxidant enzymes such as CAT and SOD in rice seedlings, were also investigated. The results showed that after four iterations of foliar application of DMSA at concentrations of 0.2, 0.4, and 1.0 mmol•L^-1, the Cd concentration in the rice seedling shoots decreased significantly with increasing DMSA spraying concentration. Compared with the control, the Cd concentration in shoots decreased by 22.1%, 39.7%, and 43.5%, respectively, but had no significant effect on the root Cd concentration. There was no significant effect on the concentrations of K, Ca, Mg, Fe, Zn, or Mn in the shoot or root. The content of MDA and GSH in the shoots of rice seedlings decreased significantly after four spraying times of DMSA and the activity of CAT and SOD increased significantly, which shows that spraying DMSA alleviated the stress effect of Cd on rice seedlings. Foliar application of DMSA can significantly reduce the accumulation of Cd in rice shoots but has no significant effect on the content of six common mineral elements, and can effectively relieve the oxidative damage caused by Cd stress. DMSA has the potential to develop a foliar modulator for reducing rice grain Cd content.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Pollution Controlled terms:Antioxidants - Cadmium - Food safety - Minerals Uncontrolled terms:Antioxidant enzyme - Antioxidant systems - Cadmium uptake - Cd concentrations - Foliar application - Food quality and safeties - Mineral element - Oxidative damage Classification code:461.6 Medicine and Pharmacology - 482.2 Minerals - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally Numerical data indexing:Molar_Concentration 1.00e+00mol/m3 to 2.20e-02mol/m3, Percentage 2.21e+01%, Percentage 3.97e+01%, Percentage 4.35e+01% DOI:10.13227/j.hjkx.202001039 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990483 Title:Spatial Distribution, Spectral Characteristics, and Sources Analysis of Dissolved Organic Matter from Baiyangdian Lake in Xiong'an New District During the Winter Freezing Period Title of translation:雄安新区-白洋淀冬季冰封期水体溶解性有机物的空间分布, 光谱特征及来源解析 Authors:Zhou, Shi-Lei (1); Sun, Yue (1); Zhang, Yi-Ran (1); Jiang, Yong-Feng (1); Yin, Lu (1); Huang, Ting-Lin (2); Li, Zai-Xing (1); Luo, Xiao (1); Zhan, Jiang (1); Wang, Han (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 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:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:213-223 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on excitation emission matrix spectroscopy (EEMs) technology combined with parallel factor analysis (PARAFAC) and ultraviolet-visible (UV-vis) spectra, we analyze the spatial distribution, spectral characteristics, and sources of dissolved organic matter (DOM) in Baiyangdian Lake, China, during a winter freezing period. Results showed that the UV-vis absorption spectrum of DOM had no obvious characteristic peak, and that the variation coefficient of absorption exhibited a significant difference (P<0.05) among different districts of Baiyangdian Lake, but that there was no significant difference between the surface and bottom waters. The changes of E3/E4, E2/E3, and SR showed that DOM had low humic and autochthonous characteristics. Two protein-like substances (C1 and C2) and one humic-like substance (C3) were identified by PARAFAC, with a significant correlation (P<0.001) being found between C1 and C3, and C2 and C3. The total DOM fluorescence intensity and the fluorescence intensity of each component exhibited significant differences (P<0.01) in the distribution among the different districts of Baiyangdian Lake, with the maximum value being associated with a sample from the Tanghe River and the minimum value being associated with a sample from Shaochedian. Moreover, the sum of C1+C2 accounted for the major proportion of DOM. DOM exhibited a strong autochthonous characteristic based on the values of BIX, FI, and HIX. Principle component analysis (PCA) and Adonis analysis showed that the spectral characteristics of DOM exhibited a significant difference (P<0.05) among the different districts. C1, C2, and C3 were significantly correlated (P<0.001) with DOM indices (HIX, BIX, Fn280, and Fn355) and water quality parameters [total nitrogen (TN), permanganate index, and total dissolved phosphorus (TDP)] based on multiple linear regression. Our results contribute to previous investigations and provide findings that can assist in the future management and control of organic carbon pollution sources to Baiyangdian Lake.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Lakes Controlled terms:Absorption spectroscopy - Biogeochemistry - Dissolution - Fluorescence - Freezing - Linear regression - Organic carbon - Pollution control - River pollution - Spatial distribution - Ultraviolet spectroscopy - Water quality Uncontrolled terms:Dissolved organic matters - Excitation emission matrices - Multiple linear regressions - Parallel factor analysis - Principle component analysis - Total dissolved phosphorus - Ultraviolet-visible spectra - UV-VIS absorption spectra Classification code:445.2 Water Analysis - 453 Water Pollution - 481.2 Geochemistry - 741.1 Light/Optics - 802.3 Chemical Operations - 804.1 Organic Compounds - 921 Mathematics - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.201906007 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368701 Title:Assessment of Heavy Metal Pollution in Surface Dust of Lanzhou Schools Based on Random Forests Title of translation:基于随机森林评价的兰州市主城区校园地表灰尘重金属污染 Authors:Hu, Meng-Jun (1); Wang, Jia (1); Zhang, Ya-Yun (1); Li, Chun-Yan (1); Li, Na-Na (1) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1838-1846 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, seven types of heavy metal elements and 11 types of characteristic parameters affecting heavy metal pollution and accumulation in surface dust were selected. Based on the comprehensive pollution index (PN) and potential ecological risk index (RI) calculated from the heavy metal element content of the school dust in the main urban area of Lanzhou City in 2018 as the training set, the PN and RI of the information sampling points were estimated using random forests. Then, the temporal and spatial characteristics of heavy metals in school dust in the main urban area of Lanzhou were analyzed. Finally, the correlation coefficient was used to evaluate the advantages and disadvantages of the traditional interpolation results and the random forest interpolation results. The results showed that the concentrations of heavy metals in the dust were higher than the local background values. The over standard rate of a single sample is 100%, Zn is 5 times higher than the background value, and Pb is 4 times higher than background value. PN in the study area was in the order Chengguan >Xigu >Anning >Qilihe, and RI was in the order Chengguan >Xigu >Qilihe >Anning. PN and RI exhibited very similar spatial distribution characteristics, both located in transportation hubs or downtown. In winter and summer, PN exhibited a high value, whereas RI had a high value. The reason for the high value of PN and RI in winter was the increase of coal sources in winter. The comparison of spatial interpolation results shows that the correlation coefficient between the results of random forest interpolation and traffic flow and normalized building index is greater than that of the traditional algorithm.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Air pollution Controlled terms:Decision trees - Dust - Heavy metals - Interpolation - Random forests - Risk perception Uncontrolled terms:Correlation coefficient - Distribution characteristics - Heavy metal pollution - Information samplings - Pollution index - Potential ecological risk - Schools - Spatial interpolation Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921.6 Numerical Methods - 961 Systems Science Numerical data indexing:Percentage 1.00e+02% DOI:10.13227/j.hjkx.201908118 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371232 Title:Characteristics and Sources Apportionment of Fine Particulate Matter in a Typical Coastal City During the Heating Period Title of translation:典型沿海城市采暖期细颗粒物组分特征及来源解析 Authors:Li, Ming-Yan (1); Yang, Wen (2); Wei, Min (1); Zhu, Hong-Xiao (1); Liu, Hou-Feng (1) Author affiliation:(1) College of Geography and Environment, Shandong Normal University, Ji'nan; 250014, China; (2) Weihai Environmental Monitoring Station, Weihai; 264200, China Corresponding author:Liu, Hou-Feng(110027@sdnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1550-1560 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To clarify the pollution characteristics and sources of PM2.5 in Weihai during the heating period, PM2.5 samples from ambient air were collected at three routine air quality monitoring sites from January to March 2018. The OC, EC, water-soluble ions, and elements in PM2.5 were analyzed, and the sources of PM2.5 were identified using the PMF model. The results showed that the average daily mass concentration of PM2.5was (33.80±22.45) μg•m^-3, and the NO3^-, NH4⁺, SO4^2-, OC, and EC were the main components of PM2.5. As a coastal city, the Cl^- ratio was relatively high in PM2.5. Meanwhile, the compositions of PM2.5 were affected by the emission of pollutants with local industrial characteristics. Both NO3^-/SO4^2- and OC/EC showed that mobile sources had a high contribution during the heating period. The acid-base ions in water-soluble ions showed that PM2.5 is weakly alkaline, and NH4⁺ is excessive. NH4⁺ mainly existed in the form of NH4NO3 and (NH4)2SO4. During the polluted period, the concentration of secondary pollutants significantly increased, and the mass concentrations of NH4⁺, NO3^-, SO4^2-, OC, and EC were 4.21, 5.27, 3.23, 2.02, and 1.81 times that of the cleaning period, respectively. The PMF model showed that secondary aerosols were the major source of PM2.5, accounting for 32.4%-36.0% of PM2.5. The contributions of vehicle exhaust, coal combustion, biomass burning, and dust were 15.6%-18.9%, 12.1%-17.8%, 9.0%-10.4%, and 8.6%-11.3%, respectively, while the contributions of process emission (2.1%-8.3%), non-road mobile sources (2.4%-3.7%), and sea salt (3.5%-5.6%) were less.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Coal combustion Controlled terms:Air quality - Coal dust - Factorization - Industrial emissions - Ions - Mobile power plants - Nitrogen compounds - Particles (particulate matter) Uncontrolled terms:Composition characteristics - PM2.5 - Positive Matrix Factorization - Source apportionment - Weihai Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 921 Mathematics - 951 Materials Science Numerical data indexing:Percentage 1.56e+01% to 1.89e+01%, Percentage 2.10e+00% to 8.30e+00%, Percentage 2.40e+00% to 3.70e+00%, Percentage 3.24e+01% to 3.60e+01%, Percentage 3.50e+00% to 5.60e+00%, Percentage 8.60e+00% to 1.13e+01% DOI:10.13227/j.hjkx.201907043 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371177 Title:Influence of Industrial Wastewater Quality on Advanced Treatment of Microbubble Ozonation Title of translation:工业废水水质对微气泡臭氧化深度处理影响 Authors:Zhang, Jing (1); Zhang, Shou-Jing (1); Liu, Chun (1); Shi, Jia-Ze (1); Chen, Xiao-Xuan (1); Zhang, Lei (1); Zhang, Rui-Na (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:Liu, Chun(liuchun@hebust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1752-1760 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The treatment performance of microbubble ozonation used for advanced treatment of actual pharmaceutical wastewater and tannery wastewater was investigated and compared to show the influence of complicated wastewater quality. The results showed that most organic pollutants in pharmaceutical wastewater and tannery wastewater could be degraded by microbubble ozonation effectively. and COD was removed simultaneously. In addition, the biodegradability was improved and the bio-toxicity was eliminated significantly. The ratios of COD amount removed and ozone amount consumed were 0.77 and 1.02, respectively, in such advanced treatment of pharmaceutical wastewater and tannery wastewater, indicating different ozone oxidation efficiencies between pharmaceutical wastewater and tannery wastewater. The main types of organic pollutants in pharmaceutical wastewater and tannery wastewater were determined by GC-MS and 3D-EEM, which showed the influence on treatment performance of microbubble ozonation. More refractory complex aromatic organic pollutants were found in pharmaceutical wastewater, which seemed more difficult to undergo degradation by microbubble ozone oxidation. As a result, the microbubble ozone oxidation of pharmaceutical wastewater was less efficient than that of tannery wastewater. The inorganic anions in both kinds of wastewater were unfavorable for ozone mass transfer, ozone decomposition, and •OH generation, which reduced the reaction efficiency of microbubble ozonation as well as biodegradability improvement. The lower concentrations of inorganic anions were better for microbubble ozonation.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Industrial water treatment Controlled terms:Air pollution - Biodegradability - Chemical oxygen demand - Efficiency - Mass transfer - Organic pollutants - Oxidation - Ozone - Ozone water treatment - Ozonization - Wastewater treatment Uncontrolled terms:Advanced treatment - Industrial wastewaters - Micro-bubble - Ozone decomposition - Ozone mass transfer - Pharmaceutical wastewater - Treatment performance - Wastewater quality Classification code:445.1.2 Water Treatment Techniques for Industrial Use - 451 Air Pollution - 452.4 Industrial Wastes Treatment and Disposal - 641.3 Mass Transfer - 801.2 Biochemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 913.1 Production Engineering DOI:10.13227/j.hjkx.201907231 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658477 Title:Relationship Between the Composition of Soil Aggregates and the Distribution of Organic Carbon Under Long-Term Abandoned Restoration Title of translation:长期撂荒恢复土壤团聚体组成与有机碳分布关系 Authors:Wang, Xing (1, 2); Zhong, Ze-Kun (1, 2); Zhang, Xin-Yi (1, 2); Wu, Shao-Jun (1, 2); Lu, Xu-Qiao (1, 2); Yang, Gai-He (1, 2); Ren, Cheng-Jie (1, 2); Han, Xin-Hui (1, 2) Author affiliation:(1) College of Agronomy, Northwest A&F University, Yangling; 712100, China; (2) Shaanxi Engineering Research Center of Circular Agriculture, Yangling; 712100, China Corresponding author:Han, Xin-Hui(hanxinhui@nwsuaf.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2416-2424 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil aggregates are important carriers of soil organic carbon (SOC) accumulation, and play an important role in the evaluation of soil structure and quality. Natural recovery can promote change in soil aggregate structure and quantity via the redistribution of SOC in the aggregates. Natural restoration from farmland is an important vegetation restoration model on the Loess Plateau. The changes in soil aggregate structure and soil carbon stock after natural restoration have received extensive attention. However, little is known about the continuous study of soil changes on the abandoned grassland during the recovery process. Therefore, to understand how SOC accumulates in the process of natural recovery and quantitatively analyze the contribution of aggregates to the total soil carbon pool, we selected four abandoned grasslands of different restoration ages on the Loess Plateau, China, and studied the changes in soil structure, soil total organic carbon (TOC), soil C:N, soil aggregate distribution, soil aggregate stable index (mean weight diameter, MWD; geometric mean diameter, GMD), and aggregate-associated SOC changes as well as their correlations from 0-20 cm and 20-40 cm soil layers in abandoned grasslands. In addition, we calculated the contribution of aggregates with different sizes to soil TOC stock. The results showed that: ① natural restoration increased the macroaggregate amount, MWD, and GMD, but decreased the amount of microaggregate and silt-and clay-sized fractions. There are significant differences in the distribution and stability of aggregates between different soil layers; the promotion effect of the surface was higher than that of the subsurface soils. ② In the 42 years after abandoning recovery, soil TOC stock, macaggregate-and mesaggregate-associated SOC stock increased significantly, and varied with soil depth and years of abandonment (1.92 times, 10.2 times, and 3.61 times). In contrast, micaggregate-associated SOC stock decreased significantly, and silt-and clay-sized fractions-associated SOC stock showed no distinct change. In addition, natural restoration promoted the ratio of C:N; nevertheless, the ratio of C:N under the surface showed a reduced phenomenon after 42 years of abandonment. ③ The improvement in soil TOC stock depends primarily on changes in the macaggregate-associated organic carbon stocks, which account for 80% of macaggregate, and the significant increase in the amount of macaggregate is the main reason for the high contribution.The results of our study suggest that natural restoration is conducive to the accumulation of soil organic carbon, and improvement in soil structure and stability. Macroaggregate is the key factor in soil organic carbon accumulation and soil structure improvement in the process of natural restoration.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Organic carbon Controlled terms:Aggregates - Landforms - Recovery - Restoration - Sediments - Shape optimization - Silt Uncontrolled terms:Clay-sized fractions - Geometric mean diameters - Mean weight diameter - Natural restoration - Soil carbon stock - Soil organic carbon - Total Organic Carbon - Vegetation restoration Classification code:406 Highway Engineering - 481.1 Geology - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 921.5 Optimization Techniques Numerical data indexing:Age 4.20e+01yr, Percentage 8.00e+01%, Size 0.00e+00m to 2.00e-01m, Size 2.00e-01m to 4.00e-01m DOI:10.13227/j.hjkx.201911133 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658123 Title:Mechanism of Urban Black Odorous Water Based on Continuous Monitoring: A Case Study of the Erkeng Stream in Nanning Title of translation:基于连续监测的城市内河返黑返臭机制初探:以南宁市二坑溪为例 Authors:Li, Yong-Xin (1); Wang, Wei (1); He, Mei (2); Shen, Tai-Ming (2) Author affiliation:(1) Nanning Exploration and Survey Geoinformation Institute, Nanning; 530022, China; (2) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China Corresponding author:Wang, Wei(dixin072@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2257-2263 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Black odorous water seriously endangers urban ecological functions. The "Water Pollution Prevention Action Plan" promulgated by the State Council has attached great importance to this issue and set a timetable for achieving the goal of pollution remediation of the urban black odorous water problem. However, in the process of managing the city's black odorous water, we found that the apparent governance effect is not sustainable. Many of the urban waters that have been treated to become clear have returned to a black odorous state. This problem has constrained the completion of the black odorous water control plan, and urgently needs to be resolved. To explain the reason for this phenomenon, we chose the Erkeng Stream in Nanning as the research object, which is a water body that returns to a black odorous state after treatment. We used a multi-parameter water quality tester and chemical analysis method to carry out daily continuous monitoring for 24 h and monthly dynamic monitoring of the water body. The results showed that the rainfall process was significantly correlated with the ammonia nitrogen concentration in the water (P<0.01), and the temperature was positively correlated with the trend of ammonia nitrogen concentration in the water (r=0.23, P<0.05), which in turn was negatively correlated with the change trend of water transparency (r=-0.33, P<0.01). The above results show that the return of the black odorous state may be related to the microbial degradation of endogenous pollutants and the input of external pollutants. The reason may be: ① The microorganisms are driven by light and temperature to promote the development of water in the direction of the black odorous state; ② Contaminants carried by rainfall promote the formation of black odor in water bodies. In short, in the context that internal pollution cannot be completely eradicated and external pollutants are difficult to control effectively, to prevent the treated urban water body from returning to a black odorous state, attention should be paid to endogenous pollutants such as river sediment and its control technology. Moreover, ecological control measures should be comprehensively adopted to reduce the input of external source indicators.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Water treatment Controlled terms:Ammonia - Biodegradation - Chemical analysis - Monitoring - Nitrogen - Quality control - Rain - River pollution - Rivers - Water pollution control - Water quality Uncontrolled terms:Continuous monitoring - Control technologies - Dynamic monitoring - Ecological functions - Microbial degradation - Pollution prevention - Urban water bodies - Water transparency Classification code:443.3 Precipitation - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 461.8 Biotechnology - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Time 8.64e+04s DOI:10.13227/j.hjkx.201909259 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658131 Title:Synthesis of Magnetic Biochar and Its Application in the Remediation of Heavy-Metal-Contaminated Soils Title of translation:磁性生物炭的合成及对土壤重金属污染的钝化效果 Authors:Wang, Jun-Nan (1); Cheng, Shan-Shan (1); Zhan, Wen-Hao (2); Ren, Qiang (1); Ma, Xiao-Yu (1); Wang, Yang-Yang (1, 3) Author affiliation:(1) National Demonstration Center for Environmental and Planning, Henan University, Kaifeng; 475004, China; (2) National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing; 100094, China; (3) Key Research Institute of Yellow River Civilization and Sustainable Development & Collaborative Innovation Center on Yellow River Civilization of Henan Province, Henan University, Kaifeng; 475004, China Corresponding author:Wang, Yang-Yang(wangyy@henu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2381-2389 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To improve the stabilization efficiency of biochar on heavy metals in soil, the magnetic material was synthesized by a mild liquid-phase reduction and oxidation method. A soil incubation experiment [0%, 0.3%, 0.6%, and 1.0% (ω)] was carried out to verify the stabilization efficiency of magnetic biochar on heavy metals in soil and its influence on soil properties. The potential stabilization mechanism of magnetic biochar on heavy metals was also analyzed. The results showed that the application of magnetic biochar decreased the bioavailable Cd, Cu, Ni, Pb, and Zn in soil, and the decrease ratio was positively correlated with the application rate of the magnetic biochar. After 24 days incubation, the content of bioavailable Cd, Cu, Ni, Pb, and Zn in soil decreased by 27.52%, 49.55%, 55.83%, 27.33%, and 26.01%, respectively [application rate (ω)at 1%]. However, the fraction of heavy metals in the soil did not change significantly, which may mainly be attributed to the relatively weak bonding mechanisms between the metals and the biochar. The application of magnetic biochar also improved soil properties. The pH of the soil increased by 0.7 units; dehydrogenase activity increased by six times; and catalase activity and organic matter increased by 37.06% and 22.11%, respectively.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Soil pollution Controlled terms:Efficiency - Heavy metals - Magnetic materials - Magnetism - Remediation - Soil pollution control - Soils - Stabilization Uncontrolled terms:Application rates - Catalase activity - Dehydrogenase activity - Heavy metal contaminated soils - Heavy metals in soil - ITS applications - Soil incubation - Stabilization mechanisms Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 701.2 Magnetism: Basic Concepts and Phenomena - 708.4 Magnetic Materials - 913.1 Production Engineering Numerical data indexing:Age 6.58e-02yr, Percentage 1.00e+00%, Percentage 2.21e+01%, Percentage 2.60e+01%, Percentage 2.73e+01%, Percentage 2.75e+01%, Percentage 3.00e-01%, Percentage 3.71e+01%, Percentage 4.95e+01%, Percentage 5.58e+01%, Percentage 6.00e-01% DOI:10.13227/j.hjkx.201911039 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104870 Title:Effects of Manure and Organic Fertilizer Application on Soil Microbial Community Diversity in Paddy Fields Title of translation:粪肥和有机肥施用对稻田土壤微生物群落多样性影响 Authors:Li, Peng (1); Wu, Jian-Qiang (2); Sha, Chen-Yan (2); Ye, Chun-Mei (1); Huang, Shen-Fa (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China Corresponding author:Huang, Shen-Fa(sfhuang67@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4262-4272 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the effect of typical manure application on soil microbes in paddy fields, a field experiment on manure application in Chongming Island was carried out. The composition and variety of soil microorganisms in rice paddy fields were analyzed using high-throughput theory (CK), chicken manure (CM), pig manure (PM), and organic fertilizer (OF). The results showed that compared with CK, the application of organic manure increased soil organic matter (SOM), and the application of chicken manure significantly increased the soil ammonia nitrogen (NH4⁺-N) and total nitrogen (TN) contents (P<0.05). Soil microbial diversity in the PM group was significantly higher than that in the CK group (P<0.05), and the soil microbial community richness in the OF group was significantly higher than that in the CM group (P<0.05). pH, total phosphorus (TP), total nitrogen, and Pb were the important factors affecting the composition of soil microbial communities in paddy fields. The microbial community structure in the CM group was significantly different from those in the other three groups. Compared with CK, the OF group increased the relative abundance of Nitrospira, and the CM group significantly reduced the relative abundance of the denitrifying bacteria Ignavibacteriae (P<0.01) to 40.56%, but significantly increased the relative abundance of nitrifying bacteria Thauera(P<0.05) to 203.00%. The PM group significantly increased the relative abundance of ammoniated bacteria Armatimonadetes (P<0.05) to 57.51% and the anaerobic strain Anaerolinea to 102.00%. The application of chicken manure and pig manure significantly increased the relative abundance of pathogens Pseudomonas and Flavisolibacter (P<0.05), respectively, while the application of organic manure reduced the relative abundance of Flavisolibacter. Overall, the application of manure increased the abundance of bacteria involved in the nitrogen cycle of paddy soils and played a positive role in regulating the nitrogen balance in paddy soils. However, direct application of chicken manure and fresh pig manure increased the abundance of pathogenic bacteria, which had a certain degree of stress on the soil health in the paddy field.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Fertilizers Controlled terms:Ammonia - Bacteria - Denitrification - Mammals - Manures - Nitrification - Nitrogen - Soils Uncontrolled terms:Denitrifying bacteria - Microbial community structures - Nitrifying bacteria - Pathogenic bacterium - Soil micro-organisms - Soil microbial community - Soil microbial diversity - Soil organic matters Classification code:483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.5 Agricultural Wastes Numerical data indexing:Percentage 1.02e+02%, Percentage 2.03e+02%, Percentage 4.06e+01%, Percentage 5.75e+01% DOI:10.13227/j.hjkx.202002050 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106465 Title:Dynamic Effects of Direct Returning of Straw and Corresponding Biochar on Acidity, Nutrients, and Exchangeable Properties of Red Soil Title of translation:秸秆直接还田和炭化还田对红壤酸度,养分和交换性能的动态影响 Authors:Yang, Cai-Di (1); Lu, Sheng-Gao (1) Author affiliation:(1) College of Environmental and Resource Sciences, Zhejiang University, Hangzhou; 310058, China Corresponding author:Lu, Sheng-Gao(lusg@zju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4246-4252 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To compare the dynamic effects of straw and corresponding biochar on soil acidity, nutrients, and exchangeable capacity in red soil, a pot experiment was performed. The treatments included control (CK), rice straw (R1B0), rice straw biochar prepared at 350℃ (R1B1) and 550℃ (R1B2), rape stalk (R2B0), and rape stalk biochar prepared at 350℃ (R2B1) and 550℃ (R2B2). Straw at 1% and corresponding biochar were added to a strongly acidic red soil. The rice was planted as the experimental crop. Soils were collected at the seedling, tillering, filling and mature stages of rice growth, respectively. The changes in soil pH, exchangeable acidity, organic matter, nutrients (NH4⁺-N and NO3^--N), and exchangeable cations in soils were measured. The results showed that soil pH, NH4⁺-N, and NO3^--N concentrations decreased with the growth period of rice, while the organic matter content and cation exchange capacity (CEC) increased. Direct returning of straw and biochar could increase soil pH, organic matter content, and exchangeable cations content, and reduce the total amount of exchangeable acids. In the mature stage of rice, rice straw and rape stalk biochar at 350℃ increased the soil pH by 0.29 and 0.42, respectively, compared to the control treatment. Similarly, biochar decreased the exchangeable acidity and exchangeable Al³⁺ content significantly compared to the direct returning treatments of straw. The exchangeable acidity and exchangeable Al³⁺ contents of soils in R1B2 and R2B1 treatments decreased by 54.8% and 58.9%, respectively, compared to the control treatment. The soil organic matter (SOM) content and CEC in biochar treatments were significantly higher than those in direct returning treatments of straw. Overall, the effects of rape stalk biochar on soil properties were slightly stronger than those of rice straw. The correlation analysis showed that soil exchangeable acids had a significantly negative correlation with organic matter (R=-0.912, P<0.01), and CEC (R=-0.866, P<0.05). The CEC in soils was positively related to organic matter (R=0.833, P<0.05). Direct returning of straw and biochar applications can effectively improve soil acidity and increase nutrient contents. The effects of straw biochar on soils were stronger than the direct returning of straw in decreasing soil acidity, and increasing soil organic matter content and exchangeable capacity in acidic soils.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Soils Controlled terms:Biogeochemistry - Nutrients - Organic compounds - Positive ions Uncontrolled terms:Cation exchange capacities - Correlation analysis - Exchangeable cation - Experimental crops - Negative correlation - Organic matter content - Soil organic matter contents - Soil organic matters Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds Numerical data indexing:Percentage 1.00e+00%, Percentage 5.48e+01%, Percentage 5.89e+01% DOI:10.13227/j.hjkx.202002213 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256315 Title:Distribution Characteristics and Source of Black Carbon Aerosols in the Northern Suburbs of Nanjing Title of translation:南京北郊黑碳气溶胶分布特征及来源 Authors:Xie, Feng (1, 2); Lin, Yu-Chi (1, 2); Song, Wen-Huai (1, 2); Bao, Meng-Ying (1, 2); Zhang, Yan-Lin (1, 2) Author affiliation:(1) 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, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Zhang, Yan-Lin(dryanlinzhang@outlook.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4392-4401 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Black carbon (BC) is an important component of atmospheric particulate matter (PM) emitted during the combustion process. Light absorption and scattering exhibited by BC affect the exchange of solar energy on Earth. In this study, continuous measurements of atmospheric particulate BC were carried out, using a BC analyzer (AE33) in the suburban area of Nanjing from January 2019 to May 2019, to realize the diurnal variations of BC during the different seasons and potential sources of BC during the clean (CD, PM2.5<35 μg•m^-3) and haze days (PD, PM2.5>75 μg•m^-3). The results showed that the average concentration of BC was (3.8±2.3) μg•m^-3; a higher average BC concentration value of (4.3±2.6) μg•m^-3 was observed during the winter, exceeding that during the spring period by a factor of 1.3. The higher BC concentrations during the winter was attributed to the stagnant weather conditions and additional emissions. Significant diurnal cycles of BC were observed with higher BC concentrations during rush hours of traffic, suggesting traffic origins. The Ångström exponent were 1.32 and 1.30 during the spring and winter periods, respectively, indicating that the BC was mainly produced from the traffic emissions during both the seasons. This hypothesis was also supported by the average BC/CO ratio of 0.005, which was similar to that of BC derived by traffic emissions. Moreover, we discovered that the contributions of traffic emissions to BC were 68%-87% and 72%-86% during the haze and clean periods, respectively. This indicated enhanced contributions of coal combustion and biomass burning to BC in Nanjing during the haze events. Finally, using the potential source contribution function (PSCF) and concentration weighted trajectory (CWT) analysis, we highlighted that the BC at the receptor site was mainly from the local emissions in the surrounding areas of Nanjing.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Coal combustion Controlled terms:Carbon - Fog - Light absorption - Particles (particulate matter) - Solar energy - Springs (components) Uncontrolled terms:Absorption and scatterings - Atmospheric particulate - Atmospheric particulate matter - Average concentration - Black carbon aerosol - Continuous measurements - Distribution characteristics - Potential source contribution function Classification code:443.1 Atmospheric Properties - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 601.2 Machine Components - 657.1 Solar Energy and Phenomena - 741.1 Light/Optics - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Percentage 6.80e+01% to 8.70e+01%, Percentage 7.20e+01% to 8.60e+01% DOI:10.13227/j.hjkx.202001128 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070573 Title:Effect of Applying Hydrochar for Reduction of Ammonia Volatilization and Mechanisms in Paddy Soil Title of translation:水热炭减少稻田氨挥发损失的效果与机制 Authors:Yu, Shan (1, 2); Xue, Li-Hong (2, 3); Hua, Yun (2); Li, De-Tian (2); Xie, Fei (4); Feng, Yan-Fang (2, 3); Sun, Qing-Ye (1); Yang, Lin-Zhang (2) Author affiliation:(1) College of Resources and Environmental Engineering, Anhui University, Hefei; 230601, China; (2) Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Nanjing; 210014, China; (3) School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang; 212001, China; (4) Jiangsu Academy of Forestry, Nanjing; 211153, China Corresponding author:Feng, Yan-Fang(jaasfengyanfang@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:922-931 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Hydrochar, as a product of the hydrothermal carbonization of biomass, has good application prospects for the NH3 volatilization reduction in rice fields due to its rich pore structure and functional surface. In this study, hydrochar was applied as a soil conditioner to paddy soil. A soil column experiment was conducted to investigate the effect of hydrochar on NH3 volatilization throughout the growth period of rice. The experiment was conducted with three treatments: CKU (control without hydrochar); SHC (sawdust hydrochar); and W-SHC (water-washed sawdust hydrochar). The application rate of SHC and W-SHC was 0.5% (w/w). The study investigated the effects of different hydrochars on the pH and concentrations of NH4⁺-N in floodwater, the flux and accumulation of NH3volatilization, and the yield-scale cumulative emission of NH3 volatilization. Results show that the SHC treatment significantly reduces cumulative emissions of NH3volatilization and the yield-scale cumulative emissions of NH3 volatilization (P<0.05), which were 32.42% and 47.61% lower than CKU, respectively. The effect of W-SHC on ammonia volatilization reduction was slightly weaker, as the cumulative emissions of NH3 volatilization and the yield-scale cumulative emissions of NH3 volatilization decreased by 10.14% and 27.71%, respectively, compared with CKU. The NH3 volatilization reduction was possibly related to the disturbance of pH and the decrease in NH4⁺-N concentrations in the floodwater because of the application of hydrochar. Compared with CKU, both SHC and W-SHC treatments reduced the pH and NH4⁺-N concentration in the floodwater. The impacts were more obvious in the rice base fertilizer period (BF) and the first supplemental fertilizer period (SF1) than in the second supplemental fertilizer period (SF2). The soil urease activity was significantly inhibited by hydrochar (P<0.05), and the abundance of soil ammonia-oxidizing gene (AOA, AOB) also significantly increased after application of SHC (P<0.05). This resulted in the enhanced efficiency of ammonia-oxidizing, which had an effect on the reduction of the NH4⁺-N concentrations in the floodwater. This study provides theoretical and experimental data support for the application of hydrochar in agro-environments with regard to ammonia volatilization reduction in paddy fields.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Ammonia Controlled terms:Carbonization - Fertilizers - Floods - Genes - pH - Pore structure - Soil conditioners - Soils Uncontrolled terms:Ammonia volatilization - Application prospect - Cumulative emissions - Hydrochar - Hydrothermal carbonization - Rice fields - Soil-column experiment - Urease Classification code:461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Percentage 1.01e+01%, Percentage 2.77e+01%, Percentage 3.24e+01%, Percentage 4.76e+01% DOI:10.13227/j.hjkx.201908026 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990457 Title:Characteristics and Sources of Elements in PM2.5 During Summer for Three Typical Cities in Pingdingshan-Suizhou-Wuhan, Central China Title of translation:夏季大气PM2.5中元素特征及源解析:以华中地区平顶山-随州-武汉为例 Authors:Liu, Wei-Jie (1); Shi, Ming-Ming (1); Cheng, Cheng (1); Li, Ying (1); Zhu, Ge-Hao (1); Xing, Xin-Li (1, 2, 3); Kong, Shao-Fei (1); Zhang, Jia-Quan (3); Qi, Shi-Hua (1, 2) Author affiliation:(1) Laboratory of Basin Hydrology and Wetland Eco-restoration, 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; (3) Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation, School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi; 435003, China Corresponding author:Xing, Xin-Li(xingxinli5300225@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:23-30 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study investigates the elemental characteristics and sources of aerosol fine particulate matter (PM2.5) samples obtained from Pingdingshan, Suizhou, and Wuhan, Central China, in June 2017. Thirteen kinds of elements (Ti, Zn, Cu, Cr, As, Pb, Fe, Ni, Se, V, Sb, Cd, and Co) were analyzed by inductively coupled plasma mass spectrometry (ICP-MS), and three source identification methods-enrichment factor, principle component analysis and multiple linear regression (PCA-MLR), and backward trajectory clustering-were applied. The results showed that Zn was the highest trace element in PM2.5 in samples from Pingdingshan, Suizhou, and Wuhan, and that the concentration of As exceeded the annual limit of Chinese air quality standards (GB 3096-2012). Concentrations of Pb and Cd in PM2.5 in samples from the three cities during the summer were low. The enrichment factor coefficients for Se, Sb, Cd, As, Cu, and Zn exceeded 10, which suggests that summer pollution from human activities was serious, for example, the enrichment factor coefficient for Se was>600. PCA-MLR and backward trajectory clustering analysis results showed that the main pollution sources in Pingdingshan during the summer were industrial fuel oil (57.90% of total), traffic pollution (24.40%), coal combustion (6.10%), and mine soil (11.60%). The main pollution source in Suizhou was fuel, which contributed 54.30% of the total. Wuhan was mainly affected by industrial emissions (60.80% of the total) and motor vehicle pollution (39.20%). Hence, Wuhan and Suizhou were mainly affected by local source emissions, whereas Pingdingshan was jointly affected by local emissions and regional inputs during the summer.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Air quality Controlled terms:Air quality standards - Coal combustion - Coal industry - Coal mines - Drug products - Inductively coupled plasma mass spectrometry - Industrial emissions - Linear regression - Soils - Trace elements Uncontrolled terms:Backward trajectory - Enrichment factor coefficients - Enrichment factors - Fine particulate matter (PM2.5) - Inductively coupled plasma mass spectrometries (ICPMS) - Multiple linear regressions - Principle component analysis - Source identification Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 483.1 Soils and Soil Mechanics - 503 Mines and Mining, Coal - 503.1 Coal Mines - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 801 Chemistry - 902.2 Codes and Standards - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.16e+01%, Percentage 2.44e+01%, Percentage 3.92e+01%, Percentage 5.43e+01%, Percentage 5.79e+01%, Percentage 6.08e+01%, Percentage 6.10e+00% DOI:10.13227/j.hjkx.201904024 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070867 Title:Characteristics and Significance of Stable Isotopes and Hydrochemistry in Surface Water and Groundwater in Nanxiaohegou Basin Title of translation:南小河沟流域地表水和地下水的稳定同位素和水化学特征及其指示意义 Authors:Guo, Ya-Wen (1); Tian, Fu-Qiang (2); Hu, Hong-Chang (2); Liu, Ya-Ping (1, 3); Zhao, Si-Han (2) Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Department of Hydraulic Engineering, Tsinghua University, Beijing; 100084, China; (3) Base of the State Key Laboratory of Urban Environmental Processes and Digital Modeling, Capital Normal University, Beijing; 100048, China Corresponding author:Liu, Ya-Ping(y.liu@cnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:682-690 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The Nanxiaohegou basin is a typical watershed in the gully region of the Loess Plateau, China. The stable isotopes of hydrogen and oxygen and the hydrochemistry of the surface water and groundwater in the region were characterized in this study. The interaction between the surface water and groundwater in the region was demonstrated based on stable isotopes and hydrochemical methods. Results show that the δD and δ¹⁸O values of precipitation change according to the seasons with high values in spring and summer and low values in autumn and winter. The δD and δ¹⁸O values of the reservoir water are higher in summer and autumn, while they are lower in the winter and spring. The seasonal variation of δD and δ¹⁸O in groundwater is not significant. The surface water and groundwater in the watershed mainly belong to Na•Mg-HCO3 -type water. The hydraulic conductivity of surface water and groundwater is characterized by high values in winter and low values in summer. Results on stable isotopes and hydrochemistry indicate that local precipitation and deep groundwater may be the main recharge sources of surface water (reservoir water, channel water) and spring water in the Nanxiaohegou basin. The perennial spring in the basin may be mainly replenished by deep groundwater, while seasonal springs are replenished by deep groundwater and local precipitation, such as the springs of Dongzhuanggou and Yangjiagou sub-basins. This study provides a greater understanding of the hydrological processes in the gully region of the Loess Plateau.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Recharging (underground waters) Controlled terms:Electric conductivity - Groundwater geochemistry - Hydrochemistry - Isotopes - Landforms - Sediments - Springs (components) - Springs (water) - Surface waters - Underground reservoirs - Watersheds Uncontrolled terms:Hydrochemical methods - Hydrogen and oxygen stable isotopes - Hydrological process - Loess Plateau - Perennial springs - Precipitation change - Seasonal variation - Surface water and groundwaters Classification code:441.2 Reservoirs - 444 Water Resources - 481.1 Geology - 481.2 Geochemistry - 483 Soil Mechanics and Foundations - 601.2 Machine Components - 701.1 Electricity: Basic Concepts and Phenomena DOI:10.13227/j.hjkx.201905184 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861779 Title:Pollution Characteristics and Sensitivity of Surface Ozone in a Typical Heavy-Industry City of the North China Plain in Summer Title of translation:华北地区典型重工业城市夏季近地面O3污染特征及敏感性 Authors:Ou, Sheng-Ju (1); Wei, Wei (1); Wang, Xiao-Qi (1); Yao, Sen (2); Zhou, Zhi-Bo (3); Guan, Pan-Bo (1); Duan, Wen-Jiao (1); Yao, Shi-Yin (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; (2) School of Energy and Environment, Zhongyuan University of Technology, Zhengzhou; 450007, China; (3) Hebei Sailhero Environmental Protection High-tech Co., Ltd., Shijiazhuang; 050035, China Corresponding author:Wei, Wei(weiwei@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3085-3094 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The pollution characteristics of surface ozone and its response to meteorological factors and precursors were studied based on monitoring and Model-3/CMAQ modeling from May to August 2018 in Handan City, China. The monitoring results showed that the maximum daily 8-hour average ozone concentration (MDA8 O3) ranged from 38.0-238.0 μg•m^-3, and the nonattainment for ozone reached 44.7% during the studied period, indicating the more severe photochemical pollution in summer in Handan City. The ozone concentration was positively correlated with temperature (R=0.74 on nonattainment days and 0.42 on attainment days), but negatively correlated with relative humidity (R=-0.63 on nonattainment days and -0.58 on attainment days), demonstrating the role of photochemistry in the surface ozone of Handan City. Moreover, the highest ozone level occurred at wind speeds higher than 2.25 m•s^-1 or lower than 1.00 m•s^-1 during ozone nonattainment days, which indicated that regional transport and local accumulation can both cause serious ozone pollution in the city. Regarding the response of ozone to its precursors (VOCs and NOx), model simulation results based on the brute force method showed the stronger positive sensitivity to VOCs, but a weak negative sensitivity to NOx. Therefore, reduction of anthropogenic VOCs emissions is the key to improving ozone pollution in Handan City. We used the propylene-equivalent method to identify the importance of alkene and aromatic species for ozone pollution during ozone nonattainment days.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Air pollution Controlled terms:Nitrogen oxides - Ozone - Pollution control - Pollution detection Uncontrolled terms:Aromatic species - Local accumulations - Meteorological factors - Monitoring results - North China Plain - Ozone concentration - Photochemical pollution - Regional transport Classification code:451 Air Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 4.47e+01%, Time 2.88e+04s, Velocity 1.00e+00m/s to 2.20e+01m/s, Velocity 2.25e+00m/s to 2.20e+01m/s DOI:10.13227/j.hjkx.201912114 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256439 Title:Emission Inventory and Characteristics of Anthropogenic Air Pollution Sources Based on Second Pollution Source Census Data in Sichuan Province Title of translation:四川省基于第二次污染源普查数据的人为源大气污染源排放清单及特征 Authors:Xu, Chen-Xi (1); Chen, Jun-Hui (1); Li, Yuan (1); He, Min (1); Feng, Xiao-Qiong (1); Han, Li (1); Liu, Zheng (1); Qian, Jun (1) Author affiliation:(1) Sichuan Academy of Environmental Sciences, Chengdu; 610000, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4482-4494 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this research, the activity data of Sichuan Province were collected using bottom-up and top-down methods. According to the second survey of pollution sources, the activity data of industrial source includes information of 11 020 boilers and 60 078 industrial enterprises. Data of 19 152 industrial enterprises were collected in Chengdu, accounting for 32% of the total number of enterprises in Sichuan Province. The anthropogenic air pollutant emission inventory of 9 km×9 km was developed for Sichuan Province in 2017 with the use of appropriate emission estimation methods. The results showed that the total emission of SO2, NOx, CO, PM10, PM2.5, BC, OC, VOCs, and NH3 in Sichuan were 308.6×10³, 725.7×10³, 3 131.2×10³, 927.6×10³, 422.4×10³, 30.2×10³, 72.0×10³, 600.9×10³, and 887.1×10³ t. The fixed combustion source and process source mainly contributed as sources of SO2. The main source of CO was the process source and mobile source. Further, the dust source and process source were the main sources of PM10 and PM2.5, and the dust source was the largest source of BC and OC contributions. The emission sources of the VOCs were primarily the process sources, mobile sources and solvent use sources. The NH3 emissions were mainly from livestock and poultry breeding and nitrogen fertilizer applications. The spatial distribution results showed that the pollutants were mainly concentrated in the densely populated Sichuan basin and Panzhihua region, where industry and agriculture were relatively developed. The high value points are concentrated along the Deyang-Chengdu-Meishan-Leshan line in Chengdu Plain. The emission inventory established in this study still has certain uncertainties, and the accuracy of activity level data acquisition should be further enhanced. Moreover, pollutant emission factor testing should be carried out for typical pollution sources, and grid emission inventory should be improved to provide scientific support for the prevention and control of air pollution in Sichuan Province in the future.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Air pollution Controlled terms:Agricultural robots - Agriculture - Air pollution control - Ammonia - Data acquisition - Dust - Nitrogen fertilizers - Population statistics - Sulfur dioxide - Surveys Uncontrolled terms:Air pollutant emission - Anthropogenic air pollution - Bottom-up and top-down - Emission inventories - Fertilizer applications - Industrial enterprise - Pollutant emission factors - Prevention and controls Classification code:451 Air Pollution - 723.2 Data Processing and Image Processing - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 3.20e+01% DOI:10.13227/j.hjkx.202002162 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368642 Title:Distribution and Source Analysis of Nitrate in Surface Waters of China Title of translation:中国地表水硝酸盐分布及其来源分析 Authors:Zhang, Xin (1); Zhang, Yan (1); Bi, Zhi-Lei (1); Shan, Ze-Xuan (1); Ren, Li-Jiang (1); Li, Qi (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 Corresponding author:Zhang, Yan(yanz@nwu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1594-1606 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The nitrate pollution of surface water has attracted worldwide attention, and it is not optimistic in China. To identify the distribution, sources, and transformation mechanisms of nitrate in China's surface waters, the nitrate data of 71 major rivers from 7 regions were systematically collected. The spatial distribution of nitrate concentrations in surface water was analyzed, and the main nitrate pollution sources were revealed based on nitrogen and oxygen isotopes of nitrate. The results show that approximately 7.83% of rivers in China exceeded the Chinese drinking water standard for nitrate (45 mg•L^-1). The concentrations of nitrate in Mudanjiang, Haihe River, and the estuary of Yangtze River was even more than 90 mg•L^-1, which indicates a serious pollution phenomenon. The isotopic compositions of surface water in China ranged from -23.5‰ to 26.99‰ for δ¹⁵N-NO3 and from -12.7‰ to 83.5‰ for δ¹⁸O-NO3. The main sources of nitrate are domestic sewage in Northeast, Central, and East China, while those are inorganic fertilizers and domestic sewage in Southwest and South China. The nitrate sources of surface water in Northwest and North China are complex, mainly from domestic sewage, inorganic fertilizer, and nitration of soil organic matter. Through correlation analysis, it is found that the nitrate concentrations of surface water have a positive relationship with population, wastewater discharge, agricultural nitrogen fertilizer application, and GDP per capita in China. It is urgent to solve the problem of pollution and prevent the further pollution of China's surface waters. The new "10-Point Water Plan" issued by the Chinese government solved the previous problems, but it will take decades to control and repair the polluted surface waters. In Northwest, North China, Southwest, and South China, not only the scale of sewage treatment plants in cities and counties should be increased but also the use of agricultural fertilizers should be controlled and managed by the government. Northeast, Central, and East China need to further control point source pollution and reduce the discharge of industrial wastewater and domestic sewage into rivers.
© 2020, Science Press. All right reserved. Number of references:59 Main heading:River pollution Controlled terms:Agricultural robots - Agriculture - Isotopes - Metadata - Nitrates - Nitrogen fertilizers - Pollution control - Potable water - Rivers - Sewage - Sewage treatment plants - Surface waters Uncontrolled terms:Distribution - Drinking water standards - Fertilizer applications - Industrial wastewaters - Nitrogen and oxygen isotopes - Polluted surface waters - Source - Transformation mechanisms Classification code:444 Water Resources - 444.1 Surface Water - 452.1 Sewage - 452.2 Sewage Treatment - 453 Water Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Mass_Density 4.50e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 9.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 7.83e+00% DOI:10.13227/j.hjkx.201909078 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517647 Title:Distribution Characteristics and Source Identification of Organophosphate Esters in Key Waters Areas of Taihu Lake Title of translation:太湖重点区域多介质水体中有机磷酸酯的分布特征及来源解析 Authors:Lü, Jia-Pei (1, 2); Zhang, Zhen-Fei (1, 2, 3); Liu, Yang (1, 2); Zhang, Heng (1, 2, 4); Wang, Chun-Ying (3); Luo, Ying (1, 2); Guo, Chang-Sheng (1, 2); Xu, Jian (1, 2) Author affiliation:(1) Center for Environmental Health Risk Assessment and Research, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou; 341000, China; (4) College of Science, North University of China, Taiyuan; 030051, China Corresponding author:Guo, Chang-Sheng(guocs@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5438-5447 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Organophosphate esters (OPEs) are ubiquitous in the environment and pose potential risks to ecosystems in that they produce cytotoxicity, genetic toxicity, developmental toxicity, neurotoxicity, and the endocrine disrupting effect. This study aimed to investigate the distribution, sources, and ecological risk of thirteen OPEs in industrial wastewater, influents and effluents of wastewater treatment plants, and the surface waters of key areas (Changzhou City) in Taihu Lake. The results showed that ∑OPEs in industrial wastewater ranged from 91.70-840.52 ng•L^-1. The profiles varied from different industries; however, tris (1-chloro-2-propyl) phosphate (TCPP), triethyl phosphate (TEP), and tris (2-chloroethyl) phosphate (TCEP) were the dominant compounds. The ∑OPEs from the wastewater treatment plants were relatively higher, ranging from 1 859.59-2 778.57 ng•L^-1. They are rather resistant to traditional wastewater treatment techniques. The removal rate of ∑OPEs, aryl OPEs, and chlorinated OPEs was 14.97%, 97.91%, and 4.37% (for W1) and 17.32%, 90.83%, and 5.40% (for W2), respectively. The concentration of OPEs in the surface water was in the range of 219.47-689.85 ng•L^-1, which was lower than that in wastewater. In addition, TEP, TCPP and TCEP predominated in the surface water samples. A principle component analysis (PCA) indicated that the industrial wastewater, emissions of vehicles, and the release of building materials may be the main sources of OPEs in the study area. A risk quotient was used to assess the ecological risk of OPEs to aquatic organisms in the surface water. Most of the OPEs showed low ecological risk, but 2-ethylhexyl diphenyl phosphate (EHDPP) posed a moderate risk in some sites, and the possible ecological effects caused by the OPEs should not be ignored in the key areas of Taihu Lake.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Industrial water treatment Controlled terms:Aquatic organisms - Cytotoxicity - Effluents - Endocrine disrupters - Esters - Industrial emissions - Lakes - Plasticizers - Reclamation - Risk assessment - Sewage pumping plants - Sewage treatment plants - Toxicity - Wastewater treatment - Water treatment plants Uncontrolled terms:Developmental toxicity - Distribution characteristics - Industrial wastewaters - Organophosphate esters - Principle component analysis - Source identification - Tris(2-chloroethyl) phosphate - Wastewater treatment plants Classification code:445.1 Water Treatment Techniques - 445.1.2 Water Treatment Techniques for Industrial Use - 451.1 Air Pollution Sources - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.7 Health Care - 461.9 Biology - 471 Marine Science and Oceanography - 803 Chemical Agents and Basic Industrial Chemicals - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 2.19e-07kg/m3 to 6.90e-07kg/m3, Mass_Density 7.79e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 9.17e-08kg/m3 to 8.41e-07kg/m3, Percentage 1.50e+01%, Percentage 1.73e+01%, Percentage 4.37e+00%, Percentage 5.40e+00%, Percentage 9.08e+01%, Percentage 9.79e+01% DOI:10.13227/j.hjkx.202005294 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256369 Title:Evolution and Evaluation of O3 and VOCs in Zhengzhou During the National Traditional Games of Ethnic Minorities Period Title of translation:郑州市少数民族运动会期间O3及VOCs污染特征的演变和评估 Authors:Zhao, Jin-Shuai (1); Yu, Shi-Jie (1); Wang, Nan (2); Ma, Shuang-Liang (2); Wang, Wei-Si (2); Yin, Sha-Sha (1); Li, Yi-Dan (1); Zhang, Dong (1); Zhang, Rui-Qin (1) Author affiliation:(1) Research Institute of Environmental Science, College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) Environmental Monitoring Center of Henan Province, Zhengzhou; 450000, China Corresponding author:Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4436-4445 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:During the National Traditional Games of Ethnic Minorities (NTGEM) 2019, air quality in Zhengzhou was analyzed to evaluate the impact of pollution prevention and control measures on Zhengzhou. Ground-observed meteorological and pollutant data as well as the chemical compositions of volatile organic compounds (VOCs) were investigated. The results showed that the six parameters of pollutants in the safeguard period in 2019 indicated a downward trend as compared with that during the same time in 2018, and the average concentrations of PM2.5 and PM10 were decreased by 16.2% and 25.1%, respectively. However, the average concentration of O3 was only reduced by 3.7%. The daily proportions of primary pollutants of O3 increased to 90% during the NTGEM, and the ozone pollution was severe in this period. Meanwhile, the concentration of total volatile organic compounds (TVOCs) in the safeguard period was 26.21×10^-9, which was significantly lower than that during the historical period. Six emission sources of the VOCs were identified using PMF model, including vehicle exhaust (28%), LPG evaporation (21%), combustion source (16%), industrial emissions (15%), solvent utilization (15%), and biogenic VOCs (5%). During the NTGEM period, the control of combustion sources and industrial sources was evident.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Quality control Controlled terms:Air pollution control - Air quality - Combustion - Industrial emissions - Volatile organic compounds Uncontrolled terms:Average concentration - Chemical compositions - Combustion sources - Historical periods - Industrial sources - Pollution prevention and controls - Primary pollutants - Total volatile organic compounds Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 804.1 Organic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Percentage 1.50e+01%, Percentage 1.60e+01%, Percentage 1.62e+01%, Percentage 2.10e+01%, Percentage 2.51e+01%, Percentage 2.80e+01%, Percentage 3.70e+00%, Percentage 5.00e+00%, Percentage 9.00e+01% DOI:10.13227/j.hjkx.202002151 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658207 Title:Nitrogen Removal Performance and Nitrogen/Carbon Balance of Oligotrophic Aerobic Denitrifiers Title of translation:贫营养好氧反硝化菌株的脱氮特性及氮/碳平衡分析 Authors:Wen, Gang (1, 2); Wang, Tong (1, 2); Huang, Ting-Lin (1, 2); Wan, Qi-Qi (1, 2); Cao, Rui-Hua (1, 2); Kou, Li-Qing (1, 2); Yang, Shang-Ye (1, 2) 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 Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2339-2348 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Due to the problems of low nitrogen removal efficiency and unclear electron transfer during biological denitrification treatment of an oligotrophic drinking water reservoir, the nitrogen removal characteristics, environmental adaptability, and electron transfer during denitrification were systematically studied using the aerobic denitrifier Acinetobacter junii ZMF5, which has efficient nitrogen removal ability. The results showed that: ① Strain ZMF5 exhibited efficient heterotrophic nitrification and aerobic denitrification ability, with an ammonia removal rate of 0.211 mg•(L•h)^-1 and a nitrate removal rate of 0.236 mg•(L•h)^-1, and the nitrification intermediates were not accumulated during the treatment process. ② According to analysis of the nitrogen removal efficiency and growth kinetics of strain ZMF5, the strain can effectively utilize different types of carbon source, and show efficient nitrogen removal efficiency under the conditions of low C/N, low pH, and low temperature. ③Analysis of nitrogen balance showed that carboxylate compound, compared with carbohydrate, could promote the process of aerobic denitrification and change the nitrogen removal pathway of strain ZMF5, i.e., 38.81% of nitrogen was transformed into gas, higher than the 29.81% for assimilation. ④Analysis of carbon balance indicated that most carbon sources were used as electron donors in the denitrification process, but fewer electrons were used for nitrate reduction, and with respect to different carbon sources, electron transfer to the nitrate respiratory chain was regulated by different reduction potentials, electron donor abundance, and molecular weight. Acinetobacter junii ZMF5 could be used to control nitrogen pollution in drinking water reservoirs.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Nitrogen removal Controlled terms:Ammonia - Carbon - Carboxylation - Denitrification - Efficiency - Electron transitions - Growth kinetics - Nitrates - Nitrification - Potable water - Reservoirs (water) - Temperature - Water pollution - Water pollution control Uncontrolled terms:Aerobic denitrification - Biological denitrification - Denitrification process - Different carbon sources - Environmental adaptability - Heterotrophic nitrification - Nitrogen removal efficiency - Removal characteristics Classification code:441.2 Reservoirs - 444 Water Resources - 453 Water Pollution - 453.2 Water Pollution Control - 641.1 Thermodynamics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Percentage 2.98e+01%, Percentage 3.88e+01% DOI:10.13227/j.hjkx.201911201 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861928 Title:Analysis of Nitrogen Pollution and Its Pollution Sources in the Muli River Basin Title of translation:木沥河流域氮素污染及其污染源解析 Authors:Qi, Ran (1, 2, 3); Xu, Fei-Fei (1); Yang, Fan (1); Yan, Chang-Zhou (1) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou; 350002, China Corresponding author:Yang, Fan(fyang@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3165-3174 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To identify the sources of nitrogen pollutants in the Muli River basin in the Guangdong-Hong Kong-Macao Greater Bay Area, ammonium salt isotope tracer technology, nitrate isotope tracer technology, and a multiple linear mixing model were applied in this study to effectively identify the changes of nitrogen sources in the basin. The results showed that nitrogen pollution in the Muli River basin was serious, and the concentrations of NH4⁺-N and NO3^--N in the confluence were higher than in the two tributaries. In addition, although there was no obvious population residence at the upstream or downstream of the Muli River basin, higher nitrogen pollution still occurred at some sites (Dakengshan tributary and aquiculture area). Qualitative analysis of ammonium salt and nitrate isotopes showed that nitrogen pollution in the Muli River basin mainly came from soil, fertilizer, atmospheric particles, and animal and human excreta. The results of the multiple linear mixing model showed that the main source of nitrogen in the upper reaches of the Dakengshan tributary is atmospheric subsidence, with a contribution rate of about 80%. The average contribution rate of soil organic nitrogen in the upper reaches of the Jilongkeng tributary was 33%, higher than those of the Dakengshan tributary (9%) and Muli River (24%). The contribution rate of sewage and manure to nitrogen pollution was up to 70% in the lower reaches of the Dakengshan tributary, the lower reaches of the Jilongkeng tributary, and the middle and upper reaches of the Muli River. In addition, while all forms of livestock and poultry farming and aquiculture activity were stopped, the contribution rate of sewage and manure in Yangzhiqu was found to be still as high as 56%, which is much higher than that at the Danshui River Dam section in the lower part of the Muli River (3%); this may be due to residual livestock waste in the sediment. This study qualitatively and quantitatively analyzed the nitrogen sources of the Muli River basin, which provids a theoretical basis for pollution source management in the Greater Bay Area.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:River pollution Controlled terms:Agriculture - Isotopes - Manures - Mixing - Nitrates - Nitrogen fertilizers - Rivers - Salts - Sewage - Trace analysis - Tracers - Watersheds Uncontrolled terms:Atmospheric particles - Contribution rate - Linear mixing models - Livestock wastes - Nitrogen pollution - Organic nitrogen - Pollution sources - Qualitative analysis Classification code:444.1 Surface Water - 452.1 Sewage - 453 Water Pollution - 801 Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes Numerical data indexing:Percentage 2.40e+01%, Percentage 3.00e+00%, Percentage 3.30e+01%, Percentage 5.60e+01%, Percentage 7.00e+01%, Percentage 8.00e+01%, Percentage 9.00e+00% DOI:10.13227/j.hjkx.201912058 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990439 Title:Bioavailability, Translocation, and Accumulation Characteristic of Heavy Metals in a Soil-Crop System from a Typical Carbonate Rock Area in Guangxi, China Title of translation:广西典型碳酸盐岩区农田土壤-作物系统重金属生物有效性及迁移富集特征 Authors:Ma, Hong-Hong (1, 2, 3); Peng, Min (1, 2, 3); Liu, Fei (1, 2, 3); Guo, Fei (1, 2, 3); Tang, Shi-Qi (1, 2, 3); Liu, Xiu-Jin (1, 2, 3); Zhou, Ya-Long (1, 2, 3); Yang, Ke (1, 2, 3); Li, Kuo (1, 2, 3); Yang, Zheng (1, 2, 3); Cheng, Hang-Xin (1, 2, 3) Author affiliation:(1) Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (2) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, Chinese Academy of Geological Sciences, Langfang; 065000, China Corresponding author:Peng, Min(pengmin@igge.cnemailchenghangxin@igge.cn)Cheng, Hang-Xin(chenghangxin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:449-459 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study uses 68 sets of paddy soil and rice grain samples collected from an area of carbonate rocks in Guangxi Province, China, to explore the ecological risks of heavy metals (As, Cd, Cr, Cu, Hg, Pb, Ni, and Zn) in soils from a high background area. We analyzed the concentrations of these heavy metals in soil and grain samples, and their chemical speciation in soil, and use these data to assess the associated ecological risks by means of statistics, a geo-accumulation index, bioconcentration factors (BCF), and correlation analysis. The arithmetic mean values of heavy metals concentrations in soil samples from the study area were (75.8±50.1), (1.91±1.02), (467.0±253.1), (48.5±9.8), (0.21±0.08), (76.2±28.1), (84.2±25.0), and (258.0±122.6) mg•kg^-1 for As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn, respectively, which were remarkably higher than of those from other regions within Guangxi Province and China. In comparison to China's soil environmental quality standard risk screening values (GB 15618-2018), the over-standard rates of Cd, As, and Cr were 95.6%, 86.8%, and 69.1%, respectively. In comparison to risk intervention values, the over-standard rates of Cd, As, and Cr were 27.9%, 17.6%, and 5.9%, respectively. Speciation analysis on heavy metals indicated that As, Cr, Cu, Ni, Pb, and Zn were mainly found in a residual form, and accounted for>80% of the total concentrations, and had a low bioavailability. The bioactive components (F1+F2+F3) of Cd accounted for 21%, and the bioactivity of Cd was higher than other elements. The potential bioavailable components (F4+F5+F6) of Hg accounted for 44%, with low total concentrations, which are understood to have little potential ecological harm for crops. However, the over-standard rates of Pb, Cd, and Cr in rice grains were only 23.5%, 8.8%, and 2.9%, respectively. Correlation analysis showed that there was no significant correlation between the concentrations of heavy metals in soils and the corresponding rice grains. The mean BCFs of each heavy metal were <0.1, and the BCFs of Hg, Pb, As, Cr, and Ni were <0.05. Overall, we found relatively high concentrations, low activity, and low ecological risks for heavy metals in the study area. For high geological background materials such as carbonate rocks, factors such as metal speciation, biological activity, and crop over-standard rates should be taken into account along with the traditional use of the total amount of heavy metals in a soil as the evaluation standard when formulating pollution control policies.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Soil pollution Controlled terms:Bioaccumulation - Bioactivity - Cadmium - Carbonates - Carbonation - Chemical speciation - Chromium - Correlation methods - Crops - Grain (agricultural product) - Metal analysis - Risk assessment - Sedimentary rocks - Soil pollution control - Soils Uncontrolled terms:Accumulation characteristics - Bioconcentration factor - Correlation analysis - Environmental quality standards - Geo-accumulation index - Geological background - High background areas - Metals concentrations Classification code:461.6 Medicine and Pharmacology - 461.9 Biology - 482.2 Minerals - 483.1 Soils and Soil Mechanics - 543.1 Chromium and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.76e+01%, Percentage 2.10e+01%, Percentage 2.35e+01%, Percentage 2.79e+01%, Percentage 2.90e+00%, Percentage 4.40e+01%, Percentage 5.90e+00%, Percentage 6.91e+01%, Percentage 8.68e+01%, Percentage 8.80e+00%, Percentage 9.56e+01% DOI:10.13227/j.hjkx.201905040 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256504 Title:Microbial Community Analysis of Different DN and PN-ANAMMOX Coupling Modes for Mature Landfill Leachate Treatment Title of translation:不同DN与PN-ANAMMOX耦合工艺处理中晚期垃圾渗滤液的微生物群落分析 Authors:Lu, Ming-Yu (1, 2); Li, Xiang (1, 2); Huang, Yong (1, 2); Yin, Ji-Qiang (1, 2); Fang, Wen-Ye (1, 2) Author affiliation:(1) School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Huang, Yong(yhuang@mail.usts.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4644-4652 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To promote the application of ANAMMOX process in landfill leachate treatment, a pilot reactor based on the ANAMMOX process was established at a landfill site. In this paper, we aim to further analyze the influence of different coupling modes of denitrification (DN) and partial nitrification and ANAMMOX (PN-ANAMMOX) on the diversity of microbial community. The DN+(PN-ANAMMOX) process could effectively treat the mature leachate. However, with an increase in organic matter in the influent, the oxygen demand of PN zone increased, and the enrichment of Nitrosomonadaceae in the PN zone was limited. The lack of substrate supply for ANAMMOX zone further limited the enrichment of Brocadiaceae as well; thus, the total nitrogen removal rate (TNRR) remained at 0.44 kg•(m³•d)^-1. In the DN-(PN-ANAMMOX) process, Saprospiraceae with denitrifying ability was enriched in the DN zone, and the organic matter was gradually degraded and removed; thus, a good low-carbon environment was provided for the subsequent PN-ANAMMOX process. Nitrosomonadaceae and Brocadiaceae were enriched in the functional zones, and the TNRR and total nitrogen removal efficiency (TNRE) of the DN-(PN-ANAMMOX) were further elevated to 0.55 kg•(m³•d)^-1 and 94.65%, respectively. Moreover, the direct treatment of mature leachate with 2 233 mg•L^-1 NH4⁺-N and 2 712 mg•L^-1 COD was finally realized. In addition, Candidatus Kuenenia was better adapted to leachate and high substrate concentration wastewater, and it became the dominant genus in the ANAMMOX zone.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Leachate treatment Controlled terms:Biogeochemistry - Denitrification - Microorganisms - Nitrogen removal - Organic compounds - Wastewater treatment Uncontrolled terms:Direct treatment - Functional zones - High substrate concentrations - Landfill leachate treatment - Microbial communities - Microbial community analysis - Partial nitrification - Total nitrogen removal Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 481.2 Geochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds Numerical data indexing:Mass_Density 2.71e+00kg/m3 to 2.20e-02kg/m3, Percentage 9.47e+01% DOI:10.13227/j.hjkx.202003002 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952731 Title:Absorption and Three Dimensional Fluorescence Spectra of CDOM in the Water of the Taibaishan Nature Reserve Title of translation:太白山自然保护区水体 CDOM吸收与三维荧光特征 Authors:Zhang, Wen-Hao (1); Zhao, Duo-Lin (1); Wang, Xiao-Yu (1); Hao, Qiang-Zhou (1); Li, Xi-Mei (2); Gao, Peng-Cheng (1) Author affiliation:(1) College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) Taibaishan Nature Reservation Administrative Bureau, Yangling; 712100, China Corresponding author:Gao, Peng-Cheng(pengcheng1969@nwsuaf.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4958-4969 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:It is very important to understand water ecology and the carbon cycle process by studying the composition, source, spectral characteristics, and influence factors of chromophoric dissolved organic matter (CDOM). The optical characteristics, composition, and source of CDOM in 71 water samples were collected from the lakes and four rivers of the Taibaishan Nature Reserve in the summer of 2019. The rivers included the Bawang, Heihe, Shitou, and Xushui Rivers. They were analyzed by UV-Vis spectral and three-dimensional fluorescence spectroscopy, combined with a parallel factor analysis model and redundant analysis. The results showed that CDOM in the water of the Taibaishan Nature Reserve contained two types of four fluorescent components, in which the humus-like components C1 and C2 were the main components of CDOM. The relative contribution of C1 and C2 to the rivers was 82%-96%, which was significantly larger than the lakes. All fluorescence indexes (FI) were larger than 1.8, the index of recent autochthonous contribution (BIX), and the index of freshness (β: α) were all approximately 0.6. The humification indexes (HIX) of the rivers were significantly larger than those of the lakes (P<0.01). The DOM in the rivers was mainly from the forest soil of the Nature Reserve, and the water quality of the lakes was affected by tourists to some extent. The results of the redundant analysis show that the CDOM spectral characteristic parameters were significantly influenced by EC for the lakes (P<0.05) and by EC, DTN, and DOC for the rivers (P<0.01).
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Water absorption Controlled terms:Fluorescence - Fluorescence spectroscopy - Lakes - Rivers - Soils - Water quality Uncontrolled terms:Carbon cycle process - Chromophoric dissolved organic matter - Optical characteristics - Parallel factor analysis - Relative contribution - Spectral characteristics - Three-dimensional fluorescence spectra - Three-dimensional fluorescence spectroscopies Classification code:445.2 Water Analysis - 483.1 Soils and Soil Mechanics - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.3 Chemical Operations Numerical data indexing:Percentage 8.20e+01% to 9.60e+01% DOI:10.13227/j.hjkx.202004165 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953162 Title:Transport Characteristics of Air Pollution in Tianjin Based on Weather Background Title of translation:基于天气背景天津大气污染输送特征分析 Authors:Cai, Zi-Ying (1, 2); Yan, Xu (1, 2); Han, Su-Qin (1, 2); Yao, Qing (1, 2); Liu, Jin-Le (3) 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 Institute, Tianjin; 300074, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4855-4863 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Regional transport is an important factor when considering the prevention and control of air pollution. The aim of this study was to provide support for the joint prevention and control of air pollution in the Beijing-Tianjin-Hebei region. With a focus on an analysis of the relationship between regional transport and meteorological conditions based on the weather background, an atmospheric chemical model was developed to quantitatively estimate the impact of regional transport on Tianjin from October 2016 to September 2017. The results showed that the contribution percentage of regional transport in cities in plains in the Beijing-Tianjin-Hebei region was significantly higher than in cities in mountains. The local contribution of PM2.5 in the Tianjin area was 62.9% and the contribution of regional transport was 37.1%. This was mainly affected by transmissions of Chanzhou, Langfang, central and southern Hebei, Beijing, Tanshan, and Shandong. Regional transport was the most significant from April to June, the weakest from July to August, and the highest contributor to local emissions. Regional transport was closely related to weather situation, wind field, precipitation, and other meteorological conditions. Post-high pressure and pre-frontal low pressure were the two types of pollution weather with the highest proportion in regional transport, and the impact of air pollution transport under the southwest wind, westerly wind and south wind was the most apparent. Wind speed of 2-3 m•s^-1 was beneficial to the regional transport of PM2.5, and precipitation above 5 mm will effectively reduce the regional transport of air pollutants. For different pollution types and heavy pollution stages, the contribution of regional transport was the most apparent in light pollution weather, being 20.5% higher than the average. The heavy pollution weather was controlled by static stable air mass, and because of the migration of high PM2.5concentrations, pollution air mass in the surrounding area had a significant impact on the accumulation of pollution and transport in the region. The contribution ratio of PM2.5 transport in the heavy pollution period was more than the average and was approximately 10% and 15% higher. In the process of heavy pollution, the proportion of transport contribution in the initial accumulation stage and peak stage were higher than in other periods, and 14.5% and 19.5% higher than in the outbreak stage. The contribution of local emissions in the outbreak stage was more significant, being 9.9% higher than average.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Air pollution control Controlled terms:Air pollution - Chemical analysis - Wind Uncontrolled terms:Air pollution transport - Beijing-tianjin-hebei regions - Contribution ratios - Meteorological condition - Prevention and controls - Regional transport - Transport characteristics - Transport contributions Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 451.2 Air Pollution Control Numerical data indexing:Percentage 1.00e+01%, Percentage 1.45e+01%, Percentage 1.50e+01%, Percentage 1.95e+01%, Percentage 2.05e+01%, Percentage 3.71e+01%, Percentage 6.29e+01%, Percentage 9.90e+00%, Size 5.00e-03m, Velocity 2.00e+00m/s to 3.00e+00m/s DOI:10.13227/j.hjkx.202004252 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952729 Title:Water Quality Response to Landscape Pattern at Different Spatial Scales in Baihe River in the Upper Reaches of the Miyun Reservoir Title of translation:密云水库上游白河地表水质对不同空间尺度景观格局特征的响应 Authors:Zhang, Wei-Wei (1); Li, Xiao-Na (1); Wang, Chao (1); Zhao, Chun-Qiao (1); Shi, Rui-Shuang (1) Author affiliation:(1) Beijing Research & Development Center for Grass and Environment, Beijing Academy of Agriculture and Forest Science, Beijing; 100097, China Corresponding author:Li, Xiao-Na(lxn1977@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4895-4904 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Understanding the quantitative relationship between multi-scale landscape pattern and water quality is of important theoretical significance for rational landscape configuration and non-point source pollution control. Using water quality data at nine monitoring sites on the Baihe River in the upper reaches of the Miyun Reservoir in Beijing, a correlation analysis and a multiple stepwise regression were used to determine the effects of the landscape characteristics on the water quality at different riparian buffer zone scales (100, 200, 300, 500, and 1 000 m). The results showed that the impact of the landscape pattern, composed of both landscape composition and configuration, on the surface water quality, varied significantly with spatial scales. The landscape characteristics for the 300 m and 100 m buffer zones appeared to have slightly greater effects on the water quality index TN and TP, respectively. The patch density of cultivated land and the aggregation index of grassland were recognized as the dominant indices influencing TN for the 300 m buffer zone. The area proportion of rural residential at the 100 m buffer zone was the dominant index influencing TP. It is very important to optimize the landscape pattern within a 300 m width of a riparian buffer zone. In particular, the reasonable allocation of cultivated land, forest, and grassland, to improve the connectivity and aggregation of agricultural landscapes, and the control of rural residential areas and pollutant discharge along the river bank, will enhance the ecological function of the water quality of the Baihe River in Beijing. This will ensure drinking water safety from the Miyun Reservoir.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:River pollution Controlled terms:Agricultural robots - Housing - Land use - Potable water - Quality control - Reservoirs (water) - Rivers - Rural areas - Water pollution control - Water quality Uncontrolled terms:Agricultural landscapes - Landscape characteristic - Landscape configuration - Multiple stepwise regression - Non-point source pollution - Riparian buffer zones - Rural residential areas - Water quality response Classification code:403 Urban and Regional Planning and Development - 403.1 Urban Planning and Development - 441.2 Reservoirs - 444 Water Resources - 445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 913.3 Quality Assurance and Control Numerical data indexing:Size 1.00e+02m, Size 1.00e+03m, Size 3.00e+02m DOI:10.13227/j.hjkx.202003250 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953359 Title:Characteristics of Nutrient Removal in a Pilot-scale A²/O with Mixture of Sludge Fermentation Liquor and Tail Water as External Carbon Source Title of translation:以污泥发酵液与尾水混合液为补给碳源的A²/O污染物去除特性 Authors:Rong, Yi (1); Shao, Jin-Bo (1); Yu, You-Cheng (2); Shi, Xuan (1); Jin, Peng-Kang (1) Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Urstar Environmental Technology Co., Ltd., Baoji; 721300, China Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5089-5096 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To resolve the issue of sewage fluctuation and discontinuity in a rural district of China, a new operation mode of replenishing the mixture of fermentation liquor and tail water during the off-flow period was proposed, and the nutrient removal performance of a pilot-scale A²/O system with this operation mode was investigated. The results of beaker experiments found that the mixture of tail water and fermentation liquor at a ratio of 12:1 had better denitrification and phosphorus release/absorption characteristics than the raw water, and theoretically had the function of enhancing denitrification and phosphorus removal performances. The results of a 97 d pilot test showed that the removal efficiency of TN and TP was improved after the system was adjusted from the constant flow mode to this new operation mode, and the average removal rate of TN and TP increased from 69.27% and 86.94% to 73.34% and 89.94%, respectively. The corresponding average effluent concentration decreased from 15.77 mg•L^-1and 0.80 mg•L^-1 to 13.76 mg•L^-1and 0.64 mg•L^-1. The sequencing results of the 16S rRNA gene showed that this new operation mode was beneficial to the enrichment of five common hydrolytic acidizing bacteria genera, six phosphorus-accumulating organisms genera, and four denitrifying bacteria genera. This was also the main reason for the improved nutrient removal performance. According to the long-term monitoring of the characteristics of activated sludge, this new operating mode will degrade the sedimentation performance of activated sludge in the system, and the average SVI increased from 106 mL•g^-1to 131 mL•g^-1. However, this degree of deterioration did not adversely affect the sludge activity and nutrients removal performance of the system, and there was no sludge bulking in the entire experiment. The results of this study have shown that the A²/O system can maintain and improve the performance of nutrients removal by replenishing the mixture of tail water and sludge fermentation liquor when the flow is cut off. This will provide new ideas for the design and operation of sewage treatment plants in rural areas in the future.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Nutrients Controlled terms:Bacteria - Carbon - Denitrification - Deterioration - Effluents - Fermentation - Mixtures - Phosphorus - RNA - Rural areas - Sewage sludge - Sewage treatment plants Uncontrolled terms:Denitrifying bacteria - Design and operations - Effluent concentrations - Enhancing denitrifications - Long term monitoring - Phosphorus accumulating organisms - Removal efficiencies - Sludge fermentation Classification code:452.2 Sewage Treatment - 452.3 Industrial Wastes - 461.2 Biological Materials and Tissue Engineering - 802.2 Chemical Reactions - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Mass_Density 6.40e-04kg/m3 to 2.20e-02kg/m3, Percentage 6.93e+01%, Percentage 8.69e+01% to 7.33e+01%, Percentage 8.99e+01%, Specific_Volume 1.06e-01m3/kg to 2.20e-02m3/kg DOI:10.13227/j.hjkx.202004241 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990502 Title:Metagenomic Analysis of Antibiotic Resistant Bacteria and Resistance Genes in a Pharmaceutical and Chemical Wastewater Treatment Plant Title of translation:宏基因组方法分析医药化工废水厂中抗生素耐药菌及耐性基因 Authors:Chen, Hong-Ling (1); Zhang, Xing-Tao (1); Wang, Qing (1); Yao, Pei-Lin (1) Author affiliation:(1) College of Food and Bioengineering, Suzhou University, Suzhou; 234000, China Corresponding author:Yao, Pei-Lin(17816860906@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:313-320 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Wastewater treatment plants hold a vast pool of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs). The aim of this study is to analyze the ARB and ARGs in a pharmaceutical and chemical wastewater treatment plant using a metagenomic technique. The results of taxonomic annotation revealed that bacteria were the predominant domain. The most abundant phyla and genus was Proteobacteria and Hyphomicrobium, respectively. A total of 74 categories of ARGs were predicted using CARD with the most dominant types being sav1866, dfrE, and mfd. Furthermore, a network analysis was conducted to investigate the co-occurrence patterns between ARGs and microbial taxa. ARGs were found to be highly connected to microbial taxa at the genus level. With respect to the antibiotic resistance mechanisms, antibiotic-specific efflux pumps appeared to be the most common mechanisms. Among these, resistance-nodulation-cell division (RND) was the major type. The most important functional pathway of this microbial community was metabolic correlation. Interestingly, there were many genes related to human diseases, among which bacterial infectious diseases were the main ones. On the one hand, these data further confirmed that pharmaceutical and chemical wastewater treatment plants are rich in ARB and ARGs. The accumulation of ARGs increases the potential environmental risks, and hence it is necessary to strengthen the active monitoring of ARB and ARGs in pharmaceutical and chemical wastewater treatment plants. On the other hand, research on ARB and ARGs offers important information for the selection of deep processing technology to effectively remove ARB and ARGs.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Sewage treatment plants Controlled terms:Antibiotics - Bacteria - Cell proliferation - Chemical analysis - Chemical resistance - Genes - Reclamation - Sewage pumping plants - Wastewater treatment - Water treatment plants Uncontrolled terms:Antibiotic resistance - Antibiotic resistance genes - Antibiotic-resistant bacteria - Co-occurrence pattern - Metabolic correlations - Microbial communities - Resistance-nodulation-cell divisions - 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 - 802.2 Chemical Reactions DOI:10.13227/j.hjkx.201903179 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861927 Title:Characterization of Microplastic Pollution of Sediments from Urban Lakes Title of translation:城市湖泊沉积物微塑料污染特征 Authors:Wang, Xuan (1); Niu, Si-Ping (1); Song, Xiao-Long (1); Rao, Zhu (2); Zhan, Nan (2) Author affiliation:(1) Department of Environmental Science and Engineering, School of Energy and Environment, Anhui University of Technology, Ma'anshan; 243002, China; (2) Key Laboratory of Ecological Geochemistry, Ministry of Natural Resources, Beijing; 100037, China Corresponding author:Niu, Si-Ping(sipingniu@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3240-3248 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, microplastics (MPs) in the environment has become a topic of increasing concern. In this study, typical urban lakes, such as Yushan Lake and Nanhu Lake in Maanshan City, were selected to study the physical morphology and spatial distribution characteristics of MPs in sediments in spring and summer and to explore the sources of MPs in the lakes. On average, MPs in sediments occurred with a content of (0.028 4±0.059 7) g•kg^-1 and abundance of (278.9±529.1) n•kg^-1 in spring, and (0.031 7±0.077 8) g•kg^-1 and (277.1±395.6) n•kg^-1 in summer, respectively. Using a paired sample T-test, it was found that there was no significant correlation difference between the content (N=22, t=-0.269, P=0.791) and the abundance (N=22, t=0.035, P=0.973) of MPs in the spring and summer sediments. Regarding shape, the MPs in the sediments in the study area were divided into three types: fiber, film, and particle, accounting for 52.9%, 28.9%, and 18.2%, respectively. Size-fraction analysis indicated MPs<1 mm made up the majority, accounting for 83.9% of the total number. It was found that the MPs were mainly polyethylene (PE) and polypropylene (PP) polymers with seriously weathered surfaces. The sediments, which were adjacent either to land with a large stream of people and vehicles or to areas with frequent watersports, had notably high abundance of MPs, revealing the close correlation between the spatial distribution of MPs in lake sediments and human activities. It is thought that atmospheric precipitation (fiber), stormwater, washing of clothes (fiber), degradation of large plastics in the lake, and fishing activities (fishing nets, foam) are the main sources of MPs in lake sediments.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Sediments Controlled terms:Fisheries - Lakes - Microplastic - Particle size analysis - Polypropylenes - Spatial distribution - Springs (components) Uncontrolled terms:Atmospheric precipitation - Distribution characteristics - Fishing activities - Human activities - Lake sediments - Paired-sample t-test - Physical morphology - Typical urban Classification code:483 Soil Mechanics and Foundations - 601.2 Machine Components - 815.1.1 Organic Polymers - 921 Mathematics - 951 Materials Science Numerical data indexing:Percentage 1.82e+01%, Percentage 2.89e+01%, Percentage 5.29e+01%, Percentage 8.39e+01% DOI:10.13227/j.hjkx.201912076 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861923 Title:Analysis of Nitrate Sources in Different Waters of a Karst Basin Title of translation:岩溶流域不同水体硝酸盐的来源解析 Authors:Tian, Yong-Zhu (1); Han, Zhi-Wei (1, 2); Zhao, Ran (1); Li, Geng (1); Zeng, Xiang-Ying (1); Huang, Jia-Yan (1) Author affiliation:(1) College of Resource and Environmental Engineering, Guizhou University, Guiyang; 550025, China; (2) Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guiyang; 550025, China Corresponding author:Han, Zhi-Wei(zwhan@gzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3157-3164 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To identify the sources and transformation processes of nitrate in surface water and groundwater in a karst basin, water samples were collected in the Songbai Mountain Reservoir basin during the normal and dry seasons. The spatio-temporal distribution, sources, and transformation processes of nitrate in the waters were analyed using a hydrochemical and stable isotopic (δ¹⁵N-NO3^-, δ¹⁸O-NO3^-, and δ¹⁸O-H2O) multi-tracing approach. The contribution rates of different nitrate sources in surface and groundwater were estimated based on the SIAR model. The results showed that NO3^--N and NH4⁺-N were the main species of dissolved inorganic nitrogen in the waters. The over standard rate of NO3^--N in groundwater was 7.89% in the normal season and 16.67% in the dry season. Temporally, the nitrate concentrations of waters in the dry season were higher than those in the normal season. Spatially, the nitrate concentrations of groundwater around dryland areas (from the Kailun River to the Songbai Mountain Reservoir) were higher than those of paddy fields (Ganhe River), and the nitrate concentrations of surface water in dryland and construction sites (Kailun River) were generally high. Nitrification was the dominant process in the waters. The nitrate in the waters mainly came from soil organic nitrogen, manure/sewage, and chemical fertilizers; their contribution rates to nitrate were 36.7%, 34.7%, and 28.6% for surface water and 39.9%, 34.9%, and 25.2% for groundwater, respectively. Nitrate pollution in the waters was mainly affected by agricultural activities and the discharge of sewage; appropriate control measures such as water and fertilizer regulation for farmland and treatment of rural sewage should be strengthened.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Nitrogen removal Controlled terms:Agricultural robots - Drought - Groundwater - Hydrochemistry - Landforms - Nitrates - Nitrogen fertilizers - River pollution - Rivers - Sewage - Underground reservoirs - Water pollution control Uncontrolled terms:Agricultural activities - Chemical fertilizers - Dissolved inorganic nitrogens - Fertilizer regulation - Nitrate concentration - Spatiotemporal distributions - Surface water and groundwaters - Transformation process Classification code:441.2 Reservoirs - 444 Water Resources - 444.2 Groundwater - 452.1 Sewage - 453 Water Pollution - 453.2 Water Pollution Control - 481.1 Geology - 481.2 Geochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.67e+01%, Percentage 2.52e+01%, Percentage 2.86e+01%, Percentage 3.47e+01%, Percentage 3.49e+01%, Percentage 3.67e+01%, Percentage 3.99e+01%, Percentage 7.89e+00% DOI:10.13227/j.hjkx.201911146 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796211 Title:Construction and Application of Early Warning System for Soil Environmental Quality Title of translation:土壤环境质量预警体系构建与应用 Authors:Li, Xiao-Nuo (1); Ding, Shou-Kang (1, 2); Chen, Wei-Ping (1, 2); Wang, Xia-Hui (3); Lü, Si-Dan (4); Liu, Rui (5) Author affiliation:(1) Laboratory of Soil Environmental Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Resource and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Soil Environmental Protection, Chinese Academy of Environmental Planning, Ministry of Ecology and Environment, Beijing; 100012, China; (4) Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (5) Academy of Science and Technology Innovation Strategy, Henan Academy of Sciences, Zhengzhou; 450002, China Corresponding author:Chen, Wei-Ping(wpchen@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2834-2841 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Early warning of soil environmental quality is an important basis for implementing classified and graded soil risk management measures. To quickly understand the regional soil environmental quality and take effective measures in time to prevent continuous soil pollution before deterioration of soil environmental quality, a simple, effective, and quantifiable early warning system for soil environmental quality of agricultural land and development land was respectively established based on environmental capacity and pollutant input-output flux theory. Furthermore, corresponding method and mechanism for early warning were defined based on soil environmental quality standards, food safety standards, and carcinogenic risk coefficients. The agricultural land in Youxian county and the development area within the fifth-ring in Beijing were chosen to assess the soil environmental quality and predict risks of heavy metals exceeding standards in different scenarios. The results show that the soil environmental quality of the agricultural land in Wangling and Taoshui Town both can be classified to the fifth early warning level. Compared with other remediation measures, the Cd contents of soil can be lowered to risk screening levels in the short term by the scenario of "paddy straw not returned to the field". The soil quality in the development area within the fifth-ring in Beijing belongs to the first early warning level under both the "no intervention" and the "decreased input" scenarios, which means that Cd, Cu, Pb, and Zn all need more than 50 years to reach their threshold values to pose potential health risks.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Soil pollution Controlled terms:Agricultural robots - Agriculture - Deterioration - Food safety - Health risks - Heavy metals - Risk assessment - Risk management - Risk perception - Soils Uncontrolled terms:Early Warning System - Effective measures - Environmental capacity - Environmental quality - Environmental quality standards - Potential health risks - Remediation measures - Risk management measures Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention - 951 Materials Science DOI:10.13227/j.hjkx.201911160 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517457 Title:Contamination Characteristics and Potential Ecological Risks of Typical Perfluoroalkyl Substances in the Water and Sediment of Coastal Tourism Resorts in Shandong Province Title of translation:山东省滨海旅游度假区水体环境典型全氟化合物污染特征及潜在生态风险 Authors:Wang, Shi-Liang (1); Cao, Xue-Zhi (2) Author affiliation:(1) School of Life Sciences, Qufu Normal University, Qufu; 273165, China; (2) School of History and Culture, Qufu Normal University, Qufu; 273165, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5428-5437 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Coastal tourism resorts have been developing rapidly in recent years, and the quality of their waterbodies directly affects human health. Perfluoroalkyl substances (PFASs) are found in every environmental medium and have garnered widespread social concern because of their potential ecological harm. This study investigated the contamination characteristics and potential ecological risks of 12 PFASs in the water and sediment of 20 coastal tourism resorts in Shandong Peninsula. The results revealed that all targeted pollutants were observed in the water and most sediment samples collected from the coastal tourism resorts. The sum of the 12 PFASs (∑PFASs) averaged 67.91 ng•L^-1 and 5.89 ng•g^-1 in the water and sediment, respectively. The predominant compounds were perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in both water and sediment. The ∑PFASs and its homologues concentration indicated the spatial variations in the water and sediment of different tourism resorts, and the values were higher in the tourism resorts near the city center and the industrial areas than in other areas. The partition coefficient (Kd) of all the target compounds in the water/sediment system of different tourism resorts showed obvious differences. In addition, the Kd of the compounds with longer carbon chains (C≥7) generally had higher Kd values, which suggests that long-chain PFAAs are prone to adsorption by sediment. Therefore, the discharge of municipal industrial wastewater and domestic sewage is the main source of contamination. The salinity of water and the total carbon contents of sediment did not show any effect on the partition of PFASs in the water/sediment system. PFOS and PFOA might have great potential ecological risks in the water environment of all tourism resorts.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Water pollution Controlled terms:Carbon - Sediments - Sewage - Tourism Uncontrolled terms:Environmental medium - Municipal-industrial wastewater - Partition coefficient - Perfluoroalkyl substances - Perfluorooctanoic acid - Potential ecological risk - Shandong Peninsula - Water/sediment systems Classification code:452.1 Sewage - 453 Water Pollution - 483 Soil Mechanics and Foundations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 6.79e-08kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202003286 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990494 Title:Measurements of Bacterial Community and Biodiversity from Activated Sludge for a Wastewater Treatment Containing Starch Title of translation:淀粉废水处理系统中活性污泥的微生物群落结构及多样性分析 Authors:Zhao, Ting-Ting (1); Qiao, Kai (1); Wang, Lei (1); Zhang, Wei (1); Zhu, Jian-Rong (1); Tang, Yi (2, 3); Hu, Bin (2); Wang, Xiang-Lian (2, 3); Yang, Jing (4); Jing, Zai-Tao (4) Author affiliation:(1) School of Environment, Beijing Normal University, Beijing; 100875, China; (2) Innovative Engineering Center, Southern University of Science and Technology, Beijing; 100083, China; (3) Beijing SUSTech Blue Science & Technology Co., Ltd., Beijing; 100083, China; (4) Shandong Xiwang Sugar Industry Co., Ltd., Zouping; 256209, China Corresponding author:Zhu, Jian-Rong(zjrtshua@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:321-329 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study analyzes the microbial community and diversity composition of activated sludge in anoxic/oxic (A/O) treatment systems at different operation stages using Illumina MiSeq high-throughput sequencing to investigate the microbial community structure and diversity in activated sludge for starch wastewater treatment. The experimental results showed that the microbial community structure of activated sludge for starch production wastewater treatment in A/O systems was quite stable under the same wastewater condition, and that the dominant bacteria of the activated sludge were Proteobacteria, Bacteroidetes, Chloroflexi, Firmicutes, and Actinobacteria. The most important dominant bacterial group was Proteobacteria (45.66%-66.30%), of which γ-subclass bacteria were the main member and occupied 36.38%-66.65%. The proportion of Sphingobacteria, the main member of the Bacteroidetes, decreased when the sludge settling performance was better, but the proportion of Anaerolineae, the main member of Chloroflexi, increased significantly when the sludge sedimentation performance was better. These changes may have been closely related to the behavior of sludge settleability. There were a large number of functional bacteria in the activated sludge, which played an important role in the degradation of pollutants and in nitrogen and/or phosphorus removal.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Wastewater treatment Controlled terms:Activated sludge process - Bacteria - Biodegradation - Biodiversity - Nitrogen removal - Reclamation - Starch Uncontrolled terms:Bacterial community - Degradation of pollutants - Functional bacteria - High-throughput sequencing - Microbial communities - Microbial community structures - Phosphorus removal - Sludge settleability Classification code:452.2 Sewage Treatment - 452.4 Industrial Wastes Treatment and Disposal - 454 Environmental Engineering - 461.8 Biotechnology - 804.1 Organic Compounds Numerical data indexing:Percentage 3.64e+01% to 6.67e+01%, Percentage 4.57e+01% to 6.63e+01% DOI:10.13227/j.hjkx.201905116 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517636 Title:Pollution and Ecological Risk Assessment and Source Apportionment of Heavy Metals in Sediments of Qingliangshan Reservoir in the Meijiang Basin Title of translation:梅江流域清凉山水库沉积物重金属污染,生态风险评价及来源解析 Authors:Jiang, Tao (1); Lin, Wei-Wen (2); Cao, Ying-Jie (3, 4); Li, Kun (1); Xuan, Ying-Xue (1); Li, Rui (1); Chen, Jian-Yao (1) Author affiliation:(1) School of Geography and Planning, Sun Yat-sen University, Guangzhou; 510275, China; (2) Huizhou Water Group, Huizhou; 516003, China; (3) School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou; 510275, China; (4) Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou; 510006, China Corresponding author:Cao, Ying-Jie(caoyingj@mail.sysu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5410-5418 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Reservoir sediment is an important sink for pollutants such as heavy metals. Under the changes in acid-base and redox conditions, there is a potential risk of heavy metals release into the water environment, which are transmitted through the food chain and threaten human health. Therefore, this study investigates the Qingliangshan Reservoir in the Meijiang River Basin, and conducts research concerning the contents and speciation of heavy metals in the sediments, potential ecological risks, and source apportionment. This study found that the content of heavy metals in the sediments of the reservoir area was in the order: Xitian tributary>dam front and reservoir center>Xintian-Baishui tributary. There is a large difference in the speciation of heavy metals in the sediments. Zn is mainly acid-soluble and in the residual state, Pb is mainly in an Fe/Mn oxide bound state, Cd is mainly in an acid-soluble state, and Cu, Ni, and Cr are in the residual state. Mainly, the percentage of bioavailable states are Cd(89%)>Pb(76%)>Zn(54%)>Cu(43%)>Ni(28%)>Cr(10%). The geoaccumulation index method shows that the pollution degree of heavy metal elements in reservoir sediments is in the order Cd>Pb>Zn>Cu>Cr>Ni, and the potential hazard ecological index method shows that the pollution degree of heavy metals is Cd>Pb>Cu>Ni>Zn>Cr. The potential ecological risk of Cd in the reservoir sediments is the largest, and the biological impact is greatest. Correlation analysis and principal component analysis results show that heavy metals Cu, Zn, Pb, and Cd in reservoir sediments are mainly from agricultural pollution, and Ni and Cr are mainly from natural background. Combined with the analysis of soil heavy metal content in the watershed, heavy metal pollution in the Qingliangshan Reservoir sediments originates from the effect of rainfall runoff and the use of agricultural chemical fertilizers before flooding in the upstream of the reservoir tributaries. There are significant spatial differences in heavy metal pollution in the sediments of the reservoir area. The Xintian-Baishui River recharge area is the least polluted, and it is closely related to the land use in the controlled watershed, which is mainly forest land, with fewer sources of pollution. The Xitian River replenishment area has the heaviest pollution. It controls many tea gardens and farmlands in the watershed, and the load of external fertilizer pollution is the largest. The pollution degree of heavy metals in front of the dam and the center of the reservoir area is between the two tributary replenishment areas, showing an obvious mixing effect.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:River pollution Controlled terms:Agricultural robots - Agricultural runoff - Agriculture - Cadmium - Chemical contamination - Chromium - Fertilizers - Health risks - Iron oxides - Land use - Metal analysis - Reservoirs (water) - Risk assessment - Rivers - Sediments - Tea - Watersheds Uncontrolled terms:Agricultural pollution - Correlation analysis - Ecological risk assessment - Geo-accumulation index - Heavy metal elements - Heavy metal pollution - Potential ecological risk - Source apportionment Classification code:403 Urban and Regional Planning and Development - 441.2 Reservoirs - 444.1 Surface Water - 453 Water Pollution - 453.1 Water Pollution Sources - 461.7 Health Care - 483 Soil Mechanics and Foundations - 543.1 Chromium and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5 Agricultural Wastes - 822.3 Food Products - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.00e+01%, Percentage 2.80e+01%, Percentage 4.30e+01%, Percentage 5.40e+01%, Percentage 7.60e+01%, Percentage 8.90e+01% DOI:10.13227/j.hjkx.202003018 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952840 Title:Remote Sensing Classification of Urban Black-odor Water Based on Decision Tree Title of translation:基于决策树的城市黑臭水体遥感分级 Authors:Li, Ling-Ling (1); Li, Yun-Mei (1, 2); Lü, Heng (1); Xu, Jie (1); Yang, Zi-Qian (1); Bi, Shun (1); Xu, Jia-Feng (1) Author affiliation:(1) Key Laboratory of Virtual Geographic Environment of Education Ministry, Nanjing Normal University, Nanjing; 210023, China; (2) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing; 210023, China Corresponding author:Li, Yun-Mei(liyunmei@njnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5060-5072 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Remote sensing monitoring of black-odor water is an important method for understanding the current status of urban water quality, and comprehensively evaluating the effect of urban water environment treatment. A total of 171 samples were collected in Nanjing, Changzhou, Wuxi, and Yangzhou cities and water quality parameters and optical parameters were measured simultaneously. Based on the analysis of the water color and optical characteristics of the black-odor water and non-black-odor water (denoted as general water), a decision tree was constructed to identify the severe, mild black-odor water, and general water as green and yellow water. The results found that: (1)According to the water color, the water bodies can be divided into six types. Among them, type 1 to 4 water bodies are black-odor water, which are gray black, dark gray, gray, and light gray water, respectively, and type 5 and 6 water bodies are general water, which are green and yellow water, respectively; (2)Type 1 water body contains high contents of non-pigmented particulate matter and colored dissolved organic matter(CDOM), however, the absorption of pigmented particulate matter is not dominant. Type 2 and 5 water bodies are dominated by pigmented particulate matter. Type 3, 4, and 6 water bodies are dominated by non-pigmented particulate matter; (3)After water color classification, and according to the differences of the reflection spectrums of the six types of water bodies, the difference of black-odorous water index (DBWI), green-red-nir area water index (G-R-NIR AWI), the green band reflectance and the normalized difference black-odorous water index (NDBWI) were used to construct a decision tree to identify the severe, mild black-odor water, and general water; (4)The decision tree was applied to the PlanetScope satellite image of Yangzhou City on April 9, 2019, and 10 synchronous sampling points were used for verification. The overall recognition accuracy reached 80.00%, and the K value reached 0.67. The urban water classification model, after water color classification, can be applied to other similar water bodies, and provides a technical method for the supervision of black-odor water bodies.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Water absorption Controlled terms:Color - Color printing - Decision trees - Particles (particulate matter) - Remote sensing - Water quality - Water treatment Uncontrolled terms:Classification models - Colored dissolved organic matter - Normalized differences - Optical characteristics - Remote sensing classification - Remote sensing monitoring - Urban water environments - Water quality parameters Classification code:445.1 Water Treatment Techniques - 445.2 Water Analysis - 741.1 Light/Optics - 745.1 Printing - 802.3 Chemical Operations - 951 Materials Science - 961 Systems Science Numerical data indexing:Percentage 8.00e+01% DOI:10.13227/j.hjkx.202003266 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953469 Title:Industrial Volatile Organic Compounds (VOCs) Emission Inventory in China Title of translation:中国工业源挥发性有机物排放清单 Authors:Liang, Xiao-Ming (1, 2); Sun, Xi-Bo (3); Xu, Jian-Tie (1); Ye, Dai-Qi (1); Chen, Lai-Guo (2) Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) State Environmental Protection Key Laboratory of Urban Ecological Environment Simulation and Protection, South China Institute of Environmental Science, Ministry of Ecology and Environment, Guangzhou; 510655, China; (3) Guangdong Provincial Academy of Environmental Science, Guangzhou; 510045, China Corresponding author:Ye, Dai-Qi(cedqye@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4767-4775 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An industrial volatile organic compounds (VOCs) emission inventory was developed in China in 2018. It was based on the emission factors method, using a revised and updated source classification system and emission factors of key industrial sources. Results showed that the total industrial VOCs emission in China in 2018 reached as high as 12 698 kt. Processes using products containing VOCs were the largest contributors, accounting for 59% of the total emission. The industrial coating industry, printing, the basic organic chemical industry, gasoline storage and transport, and the oil refinery industry were the five largest emitters, accounting for 54% of the total emission. Guangdong, Shandong, Zhejiang, and Jiangsu were the four largest emission contributors, contributing to 41% of the total emission. Hainan, Ningxia, Tibet, Heilongjiang, and Xinjiang showed the largest VOCs emission intensities, with more than 80 t•(100 million yuan)^-1. Processes using products containing VOCs were the main emission contributors in most provinces. The uncertainty for the total industrial VOCs emission in 2018, based on a Monte Carlo simulation, was [-32%, 48%] at the 95% confidence interval.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Industrial emissions Controlled terms:Chemical industry - Gasoline refining - Monte Carlo methods - Organic chemicals - Petroleum industry - Petroleum transportation - Volatile organic compounds Uncontrolled terms:Confidence interval - Emission factors - Emission intensity - Emission inventories - Industrial coatings - Industrial sources - Source classification - Total emissions Classification code:451.1 Air Pollution Sources - 523 Liquid Fuels - 804.1 Organic Compounds - 805 Chemical Engineering, General - 922.2 Mathematical Statistics Numerical data indexing:Percentage 4.10e+01%, Percentage 5.40e+01%, Percentage 5.90e+01%, Percentage 9.50e+01% DOI:10.13227/j.hjkx.202004163 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658160 Title:Sunflower-Straw-Derived Biochar-Enhanced Fe(Ⅲ)/S2O8^2- System for Degradation of Benzoic Acid Title of translation:向日葵秸秆生物炭强化Fe(Ⅲ)/S2O8^2-体系降解苯甲酸 Authors:Sun, Peng (1, 2); Zhang, Kai-Kai (1); Zhang, Yu (1); Zhang, Yan-Rong (1) Author affiliation:(1) School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou; 014010, China Corresponding author:Zhang, Yan-Rong(yanrong_zhang@hust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2301-2309 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fe(Ⅱ) activation persulfate (PS) is an effective method of degradation of organic pollutants, but the undesirable Fe(Ⅲ)/Fe(Ⅱ) cycle has become a restrictive factor in the Fe(Ⅱ)/PS system. The effects of sunflower-straw-derived biochar (SFBC) on an Fe(Ⅲ)/S2O8^2- system and the subsequent degradation of benzoic acid (BA) in water were systematically investigated. The characterization results of SFBC showed that it has a porous structure, consists of amorphous carbon, and has an abundance of surface functional groups and persistent free radicals (PFRs). The effects of critical parameters, including the initial pH, PS concentration, and dose of SFBC were also investigated. The results indicated that the degradation rate of BA in the SFBC/Fe(Ⅲ)/S2O8^2- system was significantly higher than that in the Fe(Ⅲ)/S2O8^2- system and SFBC system. The degradation efficiency of BA reached 100.00% with SFBC, BA, PS, and Fe(Ⅲ) concentrations of 2.0 g•L^-1, 10.0 mg•L^-1, 2.0 mmol•L^-1, and 1.0 mmol•L^-1, respectively, an initial pH of 3.0, and a reaction time of 90 min. Free radical quenching experiments and EPR studies demonstrated that SO4^-• and •OH were involved in the SFBC/Fe(Ⅲ)/S2O8^2- system, and the SO4^-• was the main radical for the BA degradation. Reuse and real water matrix effects experiments suggested that SFBC had good stability and practical applicability. Mechanism analysis revealed that PFRs and-OH as the electron donor reacted with Fe(Ⅲ) to generate Fe(Ⅱ), which then activated PS for highly efficient oxidation of BA.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Iron compounds Controlled terms:Amorphous carbon - Benzoic acid - Degradation - Free radicals - Organic pollutants - Water conservation - Water treatment Uncontrolled terms:Degradation efficiency - Degradation rate - Efficient oxidations - Electron donors - Mechanism analysis - Porous structures - Sunflower straws - Surface functional groups Classification code:444 Water Resources - 445.1 Water Treatment Techniques - 802.2 Chemical Reactions - 804.1 Organic Compounds - 933.2 Amorphous Solids Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e+00kg/m3 to 2.20e-02kg/m3, Molar_Concentration 1.00e+00mol/m3 to 2.20e-02mol/m3, Molar_Concentration 2.00e+00mol/m3 to 2.20e-02mol/m3, Percentage 1.00e+02%, Time 5.40e+03s DOI:10.13227/j.hjkx.201908187 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658086 Title:Distribution Characteristics and Source Apportionment of Elements Bonded with PM2.5 and PM10 in Linyi Title of translation:临沂市PM2.5和PM10中元素分布特征及来源解析 Authors:Lu, Ping (1); Zhao, Xue-Yan (2); Yin, Bao-Hui (2); Zhang, Nan (2); Wang, Xin-Hua (2); Yu, Hao (2, 3); Yang, Wen (2); Wang, Xiao-Li (1) Author affiliation:(1) College of Environmental Science & Safety Engineering, Tianjin University of Technology, Tianjin; 300384, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Water Sciences, Beijing Normal University, Beijing; 100875, China Corresponding author:Yang, Wen(yangwen@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2036-2043 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the pollution characteristics and sources of elements bonded with PM2.5 and PM10 in Linyi, PM2.5 and PM10 sample collections were carried out simultaneously in Linyi from December 2016 to October 2017, and 23 elements were determined by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES), with the enrichment factor method and PMF employed to determine the source apportionment. The results indicated that the dominant elements in PM2.5 and PM10 were recognized as Si, Ca, Al, Fe, K, Na, and Mg, accounting for 92.93% and 94.61% of the total measured elements, respectively. The concentrations of 18 elements (excluding Ti, Ni, Mo, Cd, and Mg) were highest in winter and spring, and lowest in summer and autumn. Si, Al, Ca, K, and Na showed the highest levels in spring, mainly distributed in coarse particles; Cu, Zn, Pb, and Sb showed the highest levels in winter, mainly distributed in fine particles. The enrichment factor results showed that the enrichment of Cd, Sb, and Bi was significant, mainly originated by anthropogenic sources such as coal combustion, industrial production, and waste incineration. Based on the analysis results of PMF, coal, and copper smelting, municipal waste incineration, fugitive dust, vehicle emissions, and industrial sources were the main sources of elements in PM2.5, accounting for 22.64%, 7.49%, 41.22%, 14.71%, and 13.94%, respectively. For PM10, fugitive dust, coal and copper smelting, vehicle emissions, and industrial sources were the main sources of elements, contributing 55.47%, 19.80%, 7.48%, and 12.83%, respectively. Our results suggested that the main contributors to particulate matter pollution in Linyi during the sampling period were fugitive dust, and coal and copper smelting.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Copper smelting Controlled terms:Air pollution - Coal - Coal combustion - Coal dust - Coal industry - Inductively coupled plasma - Inductively coupled plasma mass spectrometry - Industrial emissions - Optical emission spectroscopy - Silicon - Solid wastes - Springs (components) - Waste incineration Uncontrolled terms:Anthropogenic sources - Distribution characteristics - Inductively coupled plasma mass spectrometries (ICPMS) - Inductively coupled plasma-optical emission spectrometry - Industrial production - Municipal waste incineration - Particulate matter pollution - Source apportionment Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 452.4 Industrial Wastes Treatment and Disposal - 524 Solid Fuels - 533.2 Metal Refining - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 601.2 Machine Components - 801 Chemistry - 932.3 Plasma Physics - 941.4 Optical Variables Measurements Numerical data indexing:Percentage 1.28e+01%, Percentage 1.39e+01%, Percentage 1.47e+01%, Percentage 1.98e+01%, Percentage 2.26e+01%, Percentage 4.12e+01%, Percentage 5.55e+01%, Percentage 7.48e+00%, Percentage 7.49e+00%, Percentage 9.29e+01%, Percentage 9.46e+01% DOI:10.13227/j.hjkx.201909237 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658132 Title:Bioavailability Characteristics of Chromophoric Dissolved Organic Matter in Lake Gaoyou, Lake Nansi, and Lake Dongping Under Different Hydrological Scenarios Title of translation:不同水文情景下高邮湖,南四湖和东平湖有色可溶性有机物的生物可利用性特征 Authors:Zhang, Liu-Qing (1, 2); Shi, Yu (1); Li, Yuan-Peng (1); Guo, Yan-Ni (1); Zhou, Lei (1, 3); Zhou, Yong-Qiang (1); Zhang, Yun-Lin (1); Yang, Yan (2) Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) College of Environment Science and Engineering, China West Normal University, Nanchong; 637000, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Zhou, Yong-Qiang(yqzhou@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2149-2157 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The bio-lability of chromophoric dissolved organic matter (CDOM) directly reflects its biodegradability potential, and also affects the migration and conversion of pollutants and impacts water quality. This study combines excitation-emission matrices and parallel factor analysis (EEMs-PARAFAC) with laboratory 28 days of bio-incubation experiments, and analyzed the bioavailability characteristics of CDOM samples collected from Lake Gaoyou, Lake Nansi and Lake Dongping in flood season and dry season. Our results showed that: ①four fluorescent components were obtained using EEMs-PARAFAC, including a microbial humic-like C1, a terrestrial humic-like C4, a tryptophan-like C2, and a tyrosine-like C3. ②The differences of CDOM absorption pre-and post-incubation, i.e. Δa(254) of the three lakes were positive in the three lakes in the flood season, while partially negative in the dry season, indicating a quite different response of CDOM bioavailability to hydrological seasons. ③Under different hydrological scenarios, the two humic-like components C1 and C4 increased post-bio-incubation compared with that pre-incubation for the samples collected from Lake Nansi and Lake Dongping, and the two protein-like components in Lake Nansi in both the flood and dry seasons and in Lake Dongping in the flood season (t-test, P<0.001, P=0.005) were lower in the post-than those pre-incubation. In Lake Gaoyou, C1-C3 post-incubation were significantly lower than pre-incubation (t-test, P=0.008, P=0.005). In the dry season, in comparison, C1-C4 except for C2 increased post-incubation than pre-incubation for Lake Gaoyou. This indicated that the protein-like components are unstable and more easily uptaken by microorganisms and may be potentially converted into more stable humic-like components. HIX and IC:IT of the three lakes increased post-incubation while the spectral slope S275-295 decreased, which further confirmed the aforementioned conclusion. ④During both the flood and dry seasons, the bioavailability of the protein-like components C2-C3 and the fluorescence intensity of C1 and C4 in the inflowing river mouths of the three lakes were higher than in the remaining lake regions. It is therefore necessary to strengthen the water quality management in the inflowing river mouths of the three lakes to maintain the water quality of the lakes.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Lakes Controlled terms:Amino acids - Biodegradability - Biogeochemistry - Drought - Floods - Fluorescence - Organic compounds - Proteins - Quality management - Water conservation - Water management - Water pollution - Water quality Uncontrolled terms:Chromophoric dissolved organic matter - Excitation emission matrices - Fluorescence intensities - Hydrological scenarios - Inflowing rivers - Parallel factor analysis - Pre-incubation - Spectral slopes Classification code:444 Water Resources - 445.2 Water Analysis - 453 Water Pollution - 741.1 Light/Optics - 801.2 Biochemistry - 804.1 Organic Compounds - 912.2 Management Numerical data indexing:Age 7.67e-02yr DOI:10.13227/j.hjkx.201911029 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658183 Title:Succession Characteristics of Algae Functional Groups and Water Quality Assessment in a Drinking Water Reservoir Title of translation:水源水库藻类功能群落演替特征及水质评价 Authors:Li, Yan-Qing (1, 2); Huang, Ting-Lin (1, 2); Zhang, Hai-Han (1, 2); Wen, Cheng-Cheng (1, 2); Yang, Shang-Ye (1, 2); Lin, Zi-Shen (1, 2); Gao, Xin (3) Author affiliation:(1) Key Laboratory of Northwest Water Resource, Environment and Ecology, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal 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:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2158-2165 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the temporal and spatial succession characteristics of algae functional communities and water quality changes in a drinking water reservoir, the Lijiahe Reservoir was selected to monitor variations in water quality and algae from September 2018 to June 2019. The algae community was classified into functional groups following the method proposed by Reynolds and Padisák. The relationship between algal functional community and water quality was discussed, and the water quality was assessed using the water quality index (WQI) method. The results showed that 56 species of algae were obtained, belonging to 4 families and 28 genera, which were divided into 15 functional groups. The dominant algae functional communities were B, D, G, J, L0, Mp, P, W1, and X1. The algae structure of Lijiahe Reservoir showed obvious seasonal characteristics. The algal density in the mixed period was significantly lower than that in the stratification period. The main functional algae in the mixed period were Chlorella and Cyclotella, but Navicula and Synedra were the dominant functional algae in the stratification period. Redundancy analysis showed that the water temperature, mixing depth, and relative water column stability index were the main factors driving algae succession. WQI analysis indicated that the water quality of Lijiahe Reservoir was "good", and the water quality during the mixed period was slightly better than that in the stratification period. This study demonstrates that water-lifting aerators can change the succession characteristics of algae functional groups, and effectively contribute to improvement in water quality in a drinking water reservoir.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Reservoirs (water) Controlled terms:Algae - Potable water - Quality control - Surface waters - Water aeration - Water quality Uncontrolled terms:Quality change - Redundancy analysis - Seasonal characteristics - Temporal and spatial - Water columns - Water quality assessments - Water quality indexes - Water temperatures Classification code:441.2 Reservoirs - 444 Water Resources - 444.1 Surface Water - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.201910147 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861886 Title:Impacts of Leaf Surface Micromorphology Variation on the Ability to Capture Particulate Matter Title of translation:叶片微观结构变化对其颗粒物滞纳能力的影响 Authors:Wei, Wen-Jun (1, 2); Wang, Bing (1, 3); Niu, Xiang (1, 3) Author affiliation:(1) Key Laboratory of Forest Ecology and Environment of National State Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing; 100091, China; (2) Liaoning Academy of Forestry, Shenyang; 110032, China; (3) Dagangshan National Key Field Observation and Research Station for Forest Ecosystem, Xinyu; 338033, China Corresponding author:Niu, Xiang(niuxiang@caf.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3136-3147 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As the most important carrier of atmospheric particles captured by plants, the differences in micromorphology characteristics and leaf roughness are important determinants of particle capture capacity. Leaf micromorphology usually changes with growth (internal factor), and with environmental pollution intensity (external factor). The existing dust-spray simulation was always short; however, the leaf micromorphology changes had a clear delayed response, and therefore its results could not reflect the micromorphology changes caused by internal and external factors that influence the particulate capture capacity of leaves. In the present study, new and old leaves were used to study leaf growth, and different pollution source conditions were selected to study pollution intensity under natural conditions, to analyze the changes in leaf surface micromorphology and their impacts on particulate capture capacity. It was found that the amounts of TSP, PM10, PM2.5, and PM1on the old leaves of three evergreen trees (Taxus cuspidata var., Platycladus orientalis, and Pinus tabuliformis) were higher than those of the new leaves, and the amounts of the particles with respect to the old leaves increased with leaf growth. Moreover, there were significant differences between the new and old leaves regarding the captured amount of different-sized particles. The increase in needle roughness (Rq) of the three evergreen trees, caused by growth, was the main factor that led to an increase in particle capture capacity for old leaves. The TSP and PM10 captured amounts of P. orientalis, P. tabuliformis, Sophora japonica, Populus tomentosa, and Ginkgo biloba were higher in the heavily polluted area than in the clean area. The amounts of PM2.5 and PM1 captured by P. tabuliformis, G. biloba, and P. orientalis in the heavily polluted area were higher than those in the clean area; however, the amounts of PM2.5 and PM1 captured by S. japonica and P. tomentosa in the clean area were higher than those in the heavily polluted area. Pollution intensity very significantly affected the capture capacity of TSP, PM10, and PM2.5 by leaves, as well as significantly affecting the capture capacity of PM1. This was mainly caused by the leaf micromorphology changes found in the heavily polluted area, such as stomatal index decrease, waxy layer degradation, more irregular surface texture and boundaries of the epidermal cells, and longer and hardened trichomes. These changes caused the Rq values to be generally higher in the heavily polluted area than in the clean area, and the roughness of the abaxial surface increased more notably than that of the adaxial surface. These results will provide data support for further revealing the driving factors of particulate matter capture capacity of leaves and proposing more scientific urban forest management measures to improve their particulate matter removal function.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Particles (particulate matter) Controlled terms:Forestry - Plants (botany) - Pollution - Surface roughness - Textures Uncontrolled terms:Atmospheric particles - Environmental pollutions - Internal and external factors - Natural conditions - Particulate Matter - Platycladus orientalis - Pollution intensity - Urban forest management Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science DOI:10.13227/j.hjkx.201912264 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796353 Title:Characteristics and Source Apportionment of Atmospheric VOCs in the Nanjing Industrial Area in Autumn Title of translation:南京工业区秋季大气挥发性有机物污染特征及来源解析 Authors:Cao, Meng-Yao (1, 2); Lin, Yu-Chi (1, 2, 3); Zhang, Yan-Lin (1, 2, 3) Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Key Laboratory of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing; 210044, China; (3) Jiangsu Key Laboratory of Atmospheric Environmental Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Lin, Yu-Chi(yclin1226@outlook.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2565-2576 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Atmospheric volatile organic compounds (VOCs) were continuously monitored via an online GC-FID/MS system in Nanjing during the autumn of 2018 to analyze the chemical characteristics, ozone formation potential (OFP), and potential sources of VOCs in this industrial region. During the sampling period, the average concentration of atmospheric total VOCs (TVOCs) was (64.3±45.6)×10^-9. Alkanes were the most predominant VOC compound, accounting for 33.1% of the TVOC mass, followed by oxygenated volatile organic compounds (OVOCs, 22.3%) and halogenated hydrocarbons (21.8%). The diurnal cycles of VOCs revealed "bimodal" distributions. The higher concentrations of VOCs observed at 06:00-07:00 and 18:00-20:00 were attributed to the intense traffic emissions and meteorological conditions. Furthermore, maximum incremental reaction (MIR) analysis was used to estimate OFP of VOCs. The results showed that the calculated OFP in Nanjing was 267.1 μg•m^-3. Aromatic hydrocarbons and alkenes were the dominant contributors to OFPs, which accounted for 55.2% and 20.8% to the total OFPs, respectively. Finally, five potential sources of VOCs were quantified by the positive matrix factorization model, including traffic emissions (34%), industrial emissions (19%), liquefied petroleum gas (LPG) emissions (17%), usage of paints and solvents (16%), coal combustion, and biomass burning (14%). These findings suggested that control of vehicle emissions and industrial sources would be an important way to reduce VOC concentrations and improve air quality in Nanjing.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Industrial emissions Controlled terms:Air quality - Aromatic hydrocarbons - Atmospheric chemistry - Chemical analysis - Coal combustion - Factorization - Gas emissions - Liquefied petroleum gas - Quality control - Volatile organic compounds Uncontrolled terms:Average concentration - Chemical characteristic - Halogenated hydrocarbons - Liquefied petroleum gas (LPG) - Meteorological condition - Ozone formation potentials - Positive matrix factorization models - Source apportionment Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 451.2 Air Pollution Control - 521 Fuel Combustion and Flame Research - 523 Liquid Fuels - 524 Solid Fuels - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 921 Mathematics Numerical data indexing:Percentage 1.40e+01%, Percentage 1.60e+01%, Percentage 1.70e+01%, Percentage 1.90e+01%, Percentage 2.18e+01%, Percentage 2.23e+01%, Percentage 3.31e+01%, Percentage 3.40e+01%, Percentage 5.52e+01% DOI:10.13227/j.hjkx.201910154 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796310 Title:Characteristics of Macrobenthos Community Structure and Their Relationships with Environmental Factors in Rivers of Beijing in Spring Title of translation:春季北京市河流大型底栖动物群落结构特征及影响因子分析 Authors:He, Yu-Xiao (1); Li, Ke (1, 2); Ren, Yu-Fen (2); Wang, Si-Qi (2); Fang, Wen-Ying (3) Author affiliation:(1) Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo; 454000, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Daning Management Office of the Beijing South-to-North Water Diversion, Beijing; 102442, China Corresponding author:Ren, Yu-Fen(yfren@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2951-2962 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Macrobenthos from 20 sites of 17 rivers in Beijing were investigated in the spring of 2019, and the relationship between community structure characteristics and environmental factors was analyzed. A total of 64 classification units (species) of macrobenthos from 3 phyla, 6 classes, and 32 families were identified. We found that there were large spatial differences between the density composition and dominant species of macrobenthos. Mountainous river area had the highest density of aquatic insects (33.95 ind.•m^-2), and the main dominant species were Simuliidae sp., Hydropsyche sp., and Paraciadius alpicola. In suburban areas, Chironomidae and Oligochaeta showed the largest average density, which was 82.58 ind.•m^-2 and 36.21 ind.•m^-2, respectively, and Polypedilum nubeculosum and Chironomus pallidivittatus were the dominant species in this area. Furthermore, macrobenthos in urban rivers were mainly Gastropods (88.75 ind.•m^-2), and the dominant species were Bellamya aeruginosa and Bellamya purificata. Fourteen more species were found in the urban and suburban river areas than in mountain areas. According to the results of the canonical correspondence analysis, there were many factors affecting the community structure of macrobenthos, including water temperature, TN, Chl-a, pH, and human activity. Nutrient concentration was the main factor affecting the community structure of macrobenthos in the suburban river area, while human activities and water temperature were the major determinants of the macrobenthos community structure in mountainous and urban rivers.
© 2020, Science Press. All right reserved. Number of references:48 Main heading:Rivers Controlled terms:Springs (components) - Temperature Uncontrolled terms:Canonical Correspondence Analysis - Community structures - Dominant species - Environmental factors - Human activities - Nutrient concentrations - Spatial differences - Water temperatures Classification code:601.2 Machine Components - 641.1 Thermodynamics DOI:10.13227/j.hjkx.201911161 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861892 Title:Source Apportionment of Atmospheric Ammonia: Sensitivity Test Based on Stable Isotope Analysis in R Language Title of translation:稳定同位素模型解析大气氨来源的参数敏感性 Authors:Gu, Meng-Na (1, 2); Pan, Yue-Peng (1, 2); He, Yue-Xin (1); Tian, Shi-Li (1); Wang, Yan-Jun (1); Lü, Xue-Mei (1); Ni, Xue (1); Sun, Jie (1); Wu, Dian-Ming (3); Fang, Yun-Ting (4) 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 Geographic Information Sciences, School of Geographical Sciences, East China Normal University, Shanghai; 200241, China; (4) Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang; 110016, China Corresponding author:Pan, Yue-Peng(panyuepeng@mail.iap.ac.cnemailtianshili@mail.iap.ac.cn)Tian, Shi-Li(tianshili@mail.iap.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3095-3101 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ammonia (NH3) is an important precursor of fine particles and nitrogen deposition. It is critical to identify and quantify the sources of NH3 before the implementation of a mitigation strategy. Stable isotope analysis in R (SIAR) has potential with regard to the source apportionment of NH3, but its reliability is closely related to the signatures (δ¹⁵N-NH3) of emission sources. Based on SIAR, we found that the agricultural contribution varied significantly with mean δ¹⁵N-NH3 values of endmember input. In contrast, both the contributions of fossil fuel and NH3 slip showed low sensitivity against the change of endmember input. Moreover, the agricultural contribution changed by about 20% due to the variations in agricultural endmember mean values. Such a change is five times that due to the variations in endmember standard deviation values. Notably, regardless of the number of input sources tested, "non-agricultural source" was the dominant source of NH3 during hazy days in January 2013 in Beijing. Since various agricultural sources showed large variations in δ¹⁵N-NH3, future studies should focus on the endmember signatures of agricultural sources to further reduce the uncertainty in SIAR-based NH3 source apportionment.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Ammonia Controlled terms:Agricultural robots - Agriculture - Fossil fuels - Isotopes - Reliability analysis Uncontrolled terms:Agricultural sources - Atmospheric ammonia - Mitigation strategy - Nitrogen deposition - Non-agricultural sources - Source apportionment - Stable-isotope analysis - Standard deviation Classification code:804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 2.00e+01% DOI:10.13227/j.hjkx.201911132 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070239 Title:Degradation Characteristics of Antibiotics During Composting of Four Types of Feces Title of translation:4种粪便堆肥过程中抗生素的降解特性 Authors:Zhu, Wei-Jing (1); Zhu, Feng-Xiang (1); Wang, Wei-Ping (1); Hong, Chun-Lai (1); Yao, Yan-Lai (1) Author affiliation:(1) Institute of Environmental, Resources and Soil fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou; 310021, China Corresponding author:Yao, Yan-Lai(yaoyl0679@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:1005-1012 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The widespread use of antibiotics in feed results in a large number of antibiotic residues in feces. Composting technology can degrade these residual antibiotics. A pilot-scale aerobic composting device was used to analyze the antibiotic residues and composting degradation characteristics of four types of feces (maggot manure, chicken manure, pig manure, and cow manure). Results showed that sulfonamides (SAs), fluoroquinolones (FQs), tetracycline (TCs), and macrolides (MAs) were the main antibiotics, and different type of feces had different dominant antibiotics. The contents of FQs and oxytetracycline (OTC) were none on the seventh day of the compost, and their degradation rates were the fastest. After composting, the degradation rate of doxycycline (DOX) in the four types of fecal composts was more than 85%. Meanwhile, the degradation rates of SAs in chicken, pig, and cow manure composts were also more than 80%, which was much lower in the one in maggot manure compost. MAs were only found in maggot manure, and the degradation rate was 70.79% after composting. Correlation analysis indicated that the water content and bulk density were the most important environmental factors affecting the degradation rates of antibiotics in the four types of fecal composts.
© 2020, Science Press. All right reserved. Number of references:23 Main heading:Antibiotics Controlled terms:Amides - Composting - Degradation - Fertilizers - Mammals - Manures - Sulfur compounds Uncontrolled terms:Composting technologies - Correlation analysis - Degradation characteristics - Environmental factors - Feces - Fluoroquinolones (FQs) - Oxytetracyclines (OTC) - Tetracyclines (TCs) Classification code:461.6 Medicine and Pharmacology - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.5 Agricultural Wastes Numerical data indexing:Percentage 7.08e+01%, Percentage 8.00e+01%, Percentage 8.50e+01% DOI:10.13227/j.hjkx.201907032 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408370044 Title:Control of Cadmium Migration and Transformation in Alkaline Paddy Soil-Rice Using Cotton Stalk Biochar Title of translation:棉秆炭对碱性水稻土壤-水稻中镉迁移转化的阻控作用 Authors:Liu, Shi-Dou (1); Zhu, Xin-Ping (1, 2); Han, Yao-Guang (1); Zhao, Yi (1); Jin, Hang (1); Jia, Hong-Tao (1, 2) Author affiliation:(1) College of Grassland and Environmental Sciences, Xinjiang Agricultural University, Urumqi; 830052, China; (2) Xinjiang Key Laboratory of Soil and Plant Ecological Processes, Urumqi; 830052, China Corresponding author:Zhu, Xin-Ping(zhuxinping1978@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1871-1879 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We investigated the effects of cotton stalk biochar addition on the soil nutrient characteristics of alkaline paddy soil and the migration and transformation of cadmium in a soil-rice system. An outdoor pot experiment was conducted with Tefengyou 2 rice as the testing material. We added cotton stalk biochar (0%, 1%, 2.5%, and 5%) in the alkaline paddy soil with cadmium content of 0, 1, 4, and 8 mg•kg^-1. After rice harvesting, the effects of different concentrations of cotton stalk biochar on alkaline soil physical and chemical properties, cadmium enrichment and transfer in rice, and the occurrence of cadmium in soil were analyzed under different concentrations of cadmium stress. The results showed that ① adding cotton stalk biochar can effectively increase soil nutrient (P<0.05). After the addition of cotton stalk biochar, the organic matter increased by 25.74%-47.53%, and the available potassium content increased by 3.16-4.25 times. ② Cotton stalk carbon can reduce the cadmium content in soil and rice, especially after the application of 5% cotton stalk carbon, The cadmium content of brown rice at Cd4 and Cd8 concentrations decreased from 0.31 mg•kg^-1 and 0.43 mg•kg^-1 to 0.15 mg•kg^-1 and 0.10 mg•kg^-1, respectively, reaching the national standard. Cotton stalk biochar can significantly reduce the enrichment and transfer coefficient of cadmium in soil-rice systems and can increase the cadmium content in the residual cadmium but decrease the acid extractable cadmium, reducible cadmium, and oxidizable cadmium content (P<0.05). ③ Soil pH, conductivity, and nutrient indicators were significantly negatively correlated with cadmium content in rice and acid extractable cadmium, reducible cadmium, and oxidizable cadmium content in soil and were positively correlated with cadmium content in residual cadmium. The above results indicate that the application of cotton stalk biochar can significantly improve the soil nutrient of alkaline cadmium-contaminated paddy soil, and the application of cotton stalk biochar has a significant control effect on the migration and transformation of cadmium in alkaline soil and rice.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Soil pollution Controlled terms:Alkalinity - Biochemistry - Cadmium - Carbon - Chemical analysis - Cotton - Nutrients - Soils Uncontrolled terms:Alkaline soils - Bio chars - Bioaccumulation factor - Physical and chemical properties - Translocation factor Classification code:483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1 Chemistry, General - 801.2 Biochemistry - 804 Chemical Products Generally - 821.4 Agricultural Products Numerical data indexing:Percentage 2.50e+00%, Percentage 2.57e+01% to 4.75e+01%, Percentage 5.00e+00%, Percentage 0.00e+00%, Percentage 1.00e+00% DOI:10.13227/j.hjkx.201909118 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408370448 Title:Contents,Sources,and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) in Surface Soils of Various Functional Zones in Yangzhou City, China Title of translation:扬州市不同功能区表层土壤中多环芳烃的含量,来源及其生态风险 Authors:Yao, Cheng (1, 2); Ni, Jin-Zhi (2, 3); Liu, Rui (1, 2); Yang, Liu-Ming (1, 2); Chen, Wei-Feng (2, 3); Wei, Ran (1, 3) Author affiliation:(1) School of Geographical Science, Fujian Normal University, Fuzhou; 350007, China; (2) Institute of Geography, Fujian Normal University, Fuzhou; 350007, China; (3) Fujian Provincial Key Laboratory for Plant Eco-physiology, Fujian Normal University, Fuzhou; 350007, China Corresponding author:Ni, Jin-Zhi(nijz@fjnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1847-1854 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The contents and sources of 15 US EPA priority polycyclic aromatic hydrocarbons (PAHs) were analyzed in 59 surface soil samples (0-10 cm depth) collected from six functional zones, including cultural and educational area, park, residential area, vegetable garden, gas station, and industrial area, in Yangzhou City. The toxicity equivalent content of benzo[a]pyrene (TEQBaP) was adopted to assess PAH risks in soils. The results showed that the contents of ∑15PAHs in soil samples ranged from 21 to 36 118 μg•kg^-1, with a median value of 295 μg•kg^-1. The composition of PAHs was dominated by 4-6 ring PAHs. The average contents of ∑15PAHs in various functional zones in Yangzhou City was in the order of industrial area>gas station>cultural and educational area>vegetable garden>residential area>park. Correlation analysis showed that the contents of ∑15PAHs were significantly positively correlated with the contents of both TOC (P<0.05) and BC (P<0.01) in soil samples from whole Yangzhou City. However, the contents of ∑15PAHs had no significant correlations with the contents of both TOC and BC in soil samples within each functional zone except gas station, in which the contents of ∑15PAHs had a significant correlation with those of BC (P<0.01). The results of PAH ratios showed that the sources of PAHs in soils of various functional zones were mainly from oil leakage and the combustion of oil, coal, and biomass, although there were some differences among them. The values of ∑TEQBaP of 15 PAHs ranged from 2 to 4 448 μg•kg^-1in the soil samples of Yangzhou City. According to the standard value of 33 μg•kg^-1 of ∑TEQBaP for 10 PAHs in the soil environmental standard of Netherland, 45.8% of soil samples exceeded the standard in Yangzhou City. The percentages of soil samples exceeding the standard of various functional zones in Yangzhou City were in the order of industrial area (70%)>gas station (60%)>cultural and educational area (55.6%)>vegetable garden (50.0%)>residential area (30%)>park (10%). Hence, in all the functional zones of Yangzhou City, there were some soil samples with potential ecological risks, which was relatively higher in industrial area and gas station, and relatively lower in residential area and park.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Polycyclic aromatic hydrocarbons Controlled terms:Aromatization - Coal combustion - Ecology - Environmental Protection Agency - Gas plants - Gases - Housing - Leakage (fluid) - Mineral oils - Risk assessment - Soil surveys - Soils - Vegetables Uncontrolled terms:Correlation analysis - Ecological risk assessment - Ecological risks - Functional zones - Polycyclic aromatic hydrocarbons (PAHS) - Potential ecological risk - Soil environmental standards - Source Classification code:403.1 Urban Planning and Development - 454.2 Environmental Impact and Protection - 454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 513.3 Petroleum Products - 521 Fuel Combustion and Flame Research - 522 Gas Fuels - 524 Solid Fuels - 802.2 Chemical Reactions - 804.1 Organic Compounds - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 1.00e+01%, Percentage 3.00e+01%, Percentage 4.58e+01%, Percentage 5.00e+01%, Percentage 5.56e+01%, Percentage 6.00e+01%, Percentage 7.00e+01%, Size 0.00e+00m to 1.00e-01m DOI:10.13227/j.hjkx.201909065 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278171 Title:Distribution and Risk Assessment of OCPs in Surface Water, Sediments, and Fish from Lake Gucheng and Inflow and Outflow Rivers Title of translation:固城湖及出入湖河道表层水体, 沉积物和鱼体中有机氯农药分布及风险评估 Authors:Kan, Ke-Cong (1); X.-H., Gu; H.-M., Li; H.-H., Chen; Z.-G., Mao; Q.-F., Zeng Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Zeng, Qing-Fei(qfzeng@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1346-1356 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the distribution, source, and ecological risk of organochlorine pesticides (OCPs) residues in Lake Gucheng, surface water, sediment, and biological samples were collected from 12 sampling sites of Lake Gucheng and its inlets and outlets during summer and winter, and the concentrations of 19 OCPs were analyzed. The results showed that the concentration (dry weight) of OCPs in Lake Gucheng ranged from 26.74 to 48.12 ng•L^-1 in surface water, 9.01 to 35.34 ng•g^-1 in sediment, and 13.39 to 124.29 ng•g^-1 in organisms. The pollution characteristics of OCPs in surface water showed that the concentration was much higher in summer than in winter, and much higher at inflow and outflow rivers than in farming ponds and the central region of Lake Gucheng; the seasonal pollution characteristics in sediment were not obvious. All 19 kinds of OCPs in water, sediment, and organisms were detected in different degrees, and the dominant contaminants were HCHs and DDTs. α-HCH was the main pollutant at all sites in both surface water and sediment, with 21% to 42% of total HCHs in two seasons. p, p'-DDD was the main pollutant in surface water with 30% to 76% of total DDTs, whereas p, p'-DDT was the main pollutant in sediment with 68% to 93% of total DDTs in two seasons. Source analysis based on ratios of HCHs isomers and DDTs isomers indicated that there was a new input of OCPs under anaerobic conditions in the study area. The ecological risk assessment showed that the OCPs in surface water did not lead to significant health risks, but the OCPs in sediments might pose ecological risks to the Lake Gucheng ecosystem. The organisms were within the acceptable potential carcinogenic risk range.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:River pollution Controlled terms:Biology - Health risks - Isomers - Lake pollution - Lakes - Pesticides - Risk assessment - Sediments Uncontrolled terms:Anaerobic conditions - Biological samples - Carcinogenic risk - Ecological risk assessment - Ecological risks - Organochlorine pesticides - Source analysis - Source apportionment Classification code:453 Water Pollution - 461.7 Health Care - 461.9 Biology - 483 Soil Mechanics and Foundations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 2.67e-08kg/m3 to 4.81e-08kg/m3, Percentage 2.10e+01% to 4.20e+01%, Percentage 3.00e+01% to 7.60e+01%, Percentage 6.80e+01% to 9.30e+01% DOI:10.13227/j.hjkx.201909043 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278163 Title:Characteristics of Aerosol Optical Depth in the Urban Area of Beibei and Its Correlation with Particle Concentration Title of translation:北碚区气溶胶光学厚度特征及其与颗粒物浓度的相关性 Authors:Zeng, Wei (1, 2); Hao, Qing-Ju (1, 2); Zhao, Zhong-Jing (1, 2); Xiong, Wei-Xia (1, 2); Chen, Jun-Jiang (1, 2); Xin, Jin-Yuan (3); Jiang, Chang-Sheng (1, 2) Author affiliation:(1) State Cultivation Base of Eco-agriculture for Southwest Mountainous Land, Southwest University, Chongqing; 400715, China; (2) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (3) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China Corresponding author:Jiang, Chang-Sheng(jiangcs@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1067-1077 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the atmospheric quality of the Beibei District of Chongqing, using the simultaneous observation data of aerosol optical depth and particulate matter concentration in 2014, we analyzed the characteristics of aerosol optical depth (AOD) in the urban area of Beibei and its correlation with particle concentration. The results showed that the annual average of AOD500nm in Beibei District is 1.46±0.69, which varies significantly by month. The highest value in November was 2.90±1.85, and the lowest in September was 0.54±0.05. There is particulate matter pollution in Beibei District. The annual average values of PM2.5 and PM10 are (62±40)μg•m^-3 and (94±51)μg•m^-3, respectively, which exceed the secondary standard of GB 3095-2012 Ambient Air Quality Standard. The limit values, the daily average over-standard rates of PM2.5 and PM10, are 26% and 15%, respectively. There was significant correlation between fine particle PM2.5 and PM10 concentration of respirable particulate matter. The annual coefficient of determination R²could reach 0.95 (P<0.01). The correlation between AOD and PM2.5 and PM10 was positive throughout the year. The coefficient of determination R² was 0.48 and 0.46, respectively, and the coefficient of determination and correlation function were different in different seasons, among which the correlation in winter was the best and the correlation in summer was the worst. AOD and air quality index showed positive correlation characteristics throughout the year, and the coefficient of determination R² was 0.15 (P<0.05). The AOD value was affected by the comprehensive effects of weather elements. The temperature, humidity, water vapor, and other factor data should also be collected synchronously during the observation period.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Particles (particulate matter) Controlled terms:Aerosols - Air quality - Atmospheric humidity - Optical correlation - Optical properties Uncontrolled terms:Aerosol optical depths - Air quality indices - Beibei districts - Meteorological elements - Particulate Matter Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 741.1 Light/Optics - 951 Materials Science Numerical data indexing:Percentage 1.50e+01%, Percentage 2.60e+01% DOI:10.13227/j.hjkx.201907068 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106442 Title:Potential of Accumulation and Application of Dominant Plants in Lanping Lead-zinc Mine, Yunnan Province Title of translation:云南兰坪铅锌矿区优势植物重金属富集特性及应用潜力 Authors:Zhang, Long (1); Zhang, Yun-Xia (1); Song, Bo (1, 2); Wu, Yong (3); Zhou, Zi-Yang (1) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Collaborative Innovation Center for Water Pollution Control and Water Safety Guarantee in Karst Area, Guilin University of Technology, Guilin; 541004, China; (3) College of Earth Sciences, Guilin University of Technology, Guilin; 541004, China Corresponding author:Song, Bo(songbo@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4210-4217 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A field investigation in the abandoned lead-zinc mines in Yunan Province was conducted to assess the accumulation potential of dominant plant species and six heavy metals in mine soils. Eighteen types of plants were selected for the analysis. Local plants and soil were sampled and analyzed for cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), and Zn (zinc) concentrations. Bioconcentration and translocation factors were calculated. Cluster analysis was performed to calculate the accumulation potential. The results showed that all dominant plants (18 species and 13 families) were herbaceous plants. The content of heavy metals in these plants was higher than their normal content in plants. The above-ground Cd content of Corydalis yanhusuo, Carum bretschneideri, and Picris hieracioides reached 62.29, 76.49, and 85.09 mg•kg^-1. The bioconcentration factors of Cd in these three plants were 0.57, 0.58, and 0.66, and the translocation factors were 0.89, 0.45, and 1.48, respectively. These plants have a strong ability to absorb and transfer Cd in soil; hence, they have the potential to remediate the Cd-contaminated soil. The above-ground Cd content of Euphorbia fischeriana and Cynoglossum amabile were 0.46 mg•kg^-1and 0.23 mg•kg^-1, respectively, and the bioconcentration factors were less than 0.01. These two plants accumulate low levels of heavy metals and thus, are suitable for growth in high altitude areas of Southwest China. They are considered economic plants for safe use in Cd-contaminated farmlands and have high application value. To protect the ecological environment of the mining areas, the other 13 plants having good tolerance to heavy metal pollution can be used as vegetation restoration plants in mining areas.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Soil pollution Controlled terms:Abandoned mines - Bioaccumulation - Cluster analysis - Heavy metals - Lead mines - Remediation - Soils - Vegetation - Zinc mines Uncontrolled terms:Bio-concentration factors - Cd-contaminated soils - Dominant plant species - Ecological environments - Heavy metal pollution - High application value - Translocation factor - Vegetation restoration Classification code:454.2 Environmental Impact and Protection - 461.9 Biology - 483.1 Soils and Soil Mechanics - 502.1 Mine and Quarry Operations - 504.3 Heavy Metal Mines - 531 Metallurgy and Metallography - 723 Computer Software, Data Handling and Applications DOI:10.13227/j.hjkx.202001019 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070568 Title:Adsorption of Low-Concentration Phosphorus from Water by Composite Metal Modified Biochar Title of translation:复合金属改性生物炭对水体中低浓度磷的吸附性能 Authors:Sun, Ting-Ting (1); Gao, Fei (1); Lin, Li (1); Li, Rui (1); Dong, Lei (1) Author affiliation:(1) Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan; 430010, China Corresponding author:Lin, Li(artemis066@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:784-791 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, we synthesized composite metal modified biochar using fruit shell biochar impregnated with ferric chloride and potassium permanganate. We investigated its potential to adsorb phosphorus at low concentrations. Results show that the adsorption of low-concentration phosphorus by Fe and Mn modified biochar was significantly better than by non-modified biochar. SEM and FT-IR spectra indicate that iron and manganese oxides or iron hydroxides might be present on the surface of Fe and Mn modified biochar. When the phosphorus concentration is 0.5 mg•L^-1 at a temperature is 298 K and solid-to-liquid ratio (mg: L) of 500, the adsorption capacity of modified biochar is 0.96 mg•g^-1. When the pH of the solution is 4 to 10, a higher removal rate and adsorption capacity are realized. The biochar equilibrium data were fitted to the Freundlich equation, which indicated that the adsorption was a multimolecular layer adsorption. Adsorption thermodynamics studies showed that ΔG^θ<0, ΔH^θ>0, and ΔS^θ>0, indicating that the adsorption was a spontaneous, with positive entropy, and an endothermic process. The adsorption reached equilibrium after 60 min, and the adsorption kinetics followed a pseudo-second-order model. This research provides basic data for the removal of low-concentration phosphorus from a water body and sewage treatment plant.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Adsorption Controlled terms:Chlorination - Chlorine compounds - Iron metallography - Iron oxides - Manganese metallography - Manganese oxide - Potash - Potassium chloride - Sewage treatment plants - Thermodynamics - Water treatment Uncontrolled terms:Adsorption capacities - Adsorption thermodynamics - Bio chars - Ferric chloride - Low concentrations - Phosphorus concentration - Potassium permanganate - Pseudo-second order model Classification code:445.1 Water Treatment Techniques - 452.2 Sewage Treatment - 531.2 Metallography - 641.1 Thermodynamics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Temperature 2.98e+02K, Time 3.60e+03s DOI:10.13227/j.hjkx.201904058 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008949 Title:Emission Characteristics of Particulate Organic Matter from Cooking Title of translation:餐饮源有机颗粒物排放特征 Authors:Li, Yuan-Ju (1, 2); Wu, Ai-Hua (1); Tong, Meng-Xue (1); Luan, Sheng-Ji (1); Li, Zhi (1); Hu, Min (2) Author affiliation:(1) Shenzhen Institute, Peking University, Shenzhen; 518057, China; (2) State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China Corresponding author:Wu, Ai-Hua(IERESPC@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3467-3474 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cooking is an important source of atmospheric particulate organic matter (POM). In this study, four Chinese restaurants in Shenzhen (west style, dim-sim restaurant, worker's canteen, and Korean cuisine) were sampled to examine the chemical composition of POM and research molecular tracers. The result showed that more than 60% of the PM2.5 mass was due to organic compounds. For the quantified organic compounds, the results indicated that fatty acids, dicarboxylic acids, and n-alkanes were the major organic compounds emitted from all cooking styles, PAHs, sterols, and monosaccharide anhydrides were found at relatively low levels. The composition of POM was strongly influenced by cooking style. The cooking styles of the west and Korean restaurant emitted the most abundant fatty acids, n-alkanes, and PAHs, but the least sterols and monosaccharide anhydrides, whereas the dim-sim restaurant and worker's canteen displayed the opposite results. The values of Fla/(Fla+Pyr) and LG/(Gal+Man) provided candidate tracers for cooking because they were less influenced by the cooking styles and were significantly different from other pollutant sources. Furthermore, cooking contributed significant amounts of fatty acids and dicarboxylic acids to atmospheric PM in Shenzhen.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Particles (particulate matter) Controlled terms:Alcohols - Atmospheric chemistry - Biogeochemistry - Cooking - Fatty acids - Glucose - Hydrocarbons - Lipids - Paraffins - Tracers Uncontrolled terms:Atmospheric particulate - Chemical compositions - Dicarboxylic acid - Emission characteristics - Molecular tracer - Monosaccharide anhydrides - Particulate organic matters - Pollutant sources Classification code:443.1 Atmospheric Properties - 481.2 Geochemistry - 804.1 Organic Compounds - 822.2 Food Processing Operations - 951 Materials Science Numerical data indexing:Percentage 6.00e+01% DOI:10.13227/j.hjkx.202001027 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105056 Title:Intraspecific Variation in Growth and Alkaline Phosphatase Activity of Cylindrospermopsis raciborskii Strains in Response to Different Phosphorus Concentrations and Sources Title of translation:拟柱孢藻生长及碱性磷酸酶活性对不同磷浓度和磷形态响应的株系间差异 Authors:Ye, Jin-Mei (1); Zhao, Li (1); Luo, Xu (1); Peng, Liang (1, 2); Lei, La-Mei (1, 2) Author affiliation:(1) Department of Ecology, College of Life Science and Technology, Jinan University, Guangzhou; 510632, China; (2) Guangdong Center for Control and Prevention of Reservoir Cyanobacterial Blooms, Guangzhou; 510632, China Corresponding author:Lei, La-Mei(tleilam@jnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4088-4094 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The cyanobacterial species C. raciborskii are ubiquitous in tropical regions, and its successful invasion into temperate zones has been partially attributed to its ability of survival in low P availability and the existence of multiple ecotypes. To explore the physiological response of different strains to phosphorus fluctuations, four strains of C. raciborskii isolated from the Zhenhai Reservoir were used to investigate their growth and alkaline phosphatase (ALP) activity at different inorganic phosphorus (Pi) concentrations (HP=7.13 mg•L^-1, MP=0.64 mg•L^-1, LP=0.03 mg•L^-1) and different phosphorus forms [dipotassium hydrogen phosphate (K2HPO4), sodium pyrophosphate (K4P2O7), sodium polyphosphate (K5P3O10), D-glucose-6-phosphate (D-G-6-P), adenosine triphosphate (ATP), cyclic adenosine monophosphate (cAMP)]. Four C. raciborskii strains showed a similar growth response to phosphate changes: their biomass increased with an increase in Pi concentrations, while the ALP activity showed the opposite trend. The ALP activity of C. raciborskii N8 was significantly lower than that of other three strains, regardless of inorganic phosphorus concentrations, suggesting that this strain had a higher adaptability to phosphorus fluctuations. When cultured with different phosphorus forms, the biomass of C. raciborskii N8 and N9 in three dissolved inorganic phosphorus (DIP) compounds were significantly higher than those in three dissolved organic phosphorus (DOP) compounds, with the maximum and minimum specific growth rate in K2HPO4and ATP treatments, respectively. C. raciborskii preferred DIP although they can also utilize DOP to sustain its growth. Under the DOP conditions, the ALP activity of C. raciborskii N8 in the ATP treatment was significantly higher than that in the other two organic phosphorus compounds, while we did not observe similar results in C. raciborskii N9, indicating that strain N8 was more sensitive to DIP deficiency. Our results showed an intraspecific variation within C. raciborskii strains from the same reservoir. Compared with the other strains, strain N8 represented better adaptability to phosphorus fluctuations and DIP deficiency. Variations within C. raciborskii strains may make this species more adaptable to environmental changes and enhance its competitive advantage.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Ecology Controlled terms:Adenosinetriphosphate - Competition - Multiple zones - Phosphatases - Phosphorus compounds - Physiological models - Sodium compounds - Strain Uncontrolled terms:Alkaline phosphatase activity - Cyanobacterial species - Cyclic adenosine monophosphate (cAMP) - Dipotassium hydrogen phosphates - Dissolved inorganic phosphorus - Dissolved organic phosphorus (DOP) - Intraspecific variation - Phosphorus concentration Classification code:454.3 Ecology and Ecosystems - 512.1.1 Oil Fields - 804 Chemical Products Generally - 804.1 Organic Compounds - 911.2 Industrial Economics - 951 Materials Science DOI:10.13227/j.hjkx.201912180 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256522 Title:Spatial Distribution and Pollution Characteristics of Heavy Metals in Plant Leaves in Baoji City Title of translation:宝鸡市绿植叶片重金属空间分布及污染特征 Authors:Zhang, Jun (1, 2); Liang, Qing-Fang (1); Gao, Yu (1) Author affiliation:(1) Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, Baoji University of Arts and Sciences, Baoji; 721013, China; (2) Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, Chang'an University, Xi'an; 710064, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4504-4513 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As an important carrier of heavy metal pollutants in urban dust, green plants play an important role in the study of heavy metal pollution in the environment. To quantitatively assess the pollution degree, spatial distribution, and characteristics of dust accumulation of heavy metals in the leaves of 10 dominant green plants in Baoji City, the contents of Pb, Zn, Cu, Cr, Ni, Co, Cd, and As were determined in 156 leaf samples with a ground height of 0, 1, and 3 m in Baoji City, and the biological enrichment coefficient (BCF), pollution load index (PLI), and potential ecological risk index (RI) were calculated. The enrichment amounts of Cr, As, Ni, Pb, and Cd were the highest in the leaves of the green plants in Baoji City. The contents of Cr, Ni, and As in Ophiopogon Japonicus were the highest; the highest content of Cd was found in privet leaves, and the contents of Pb, Ni, and As in the leaves of tarasone were the highest. Clover, privet, and photinia revealed significant enrichment of Cd. The contents of Cr, As, Ni, Pb, Cd, and Zn decreased with an increase in the height of spatial distribution. Moreover, the rate of decrease in Cr was up to 24%, and the peak areas were around the Qianhe industrial zone, Renjiawan railway station, and the municipal government. According to PLI and RI values, the Renjiavan railway station and Qianhe industrial zone were moderately polluted areas with moderate ecological risk level, whereas the high-tech avenue area represented a strong ecological risk level. In addition, the PLI values of both Cr and As in the leaves of the green plants were greater than 3, indicating a level of severe pollution. Based on the average Erⁱ values, Cd and As were the most ecologically harmful elements. The study area was at a medium risk level.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Plants (botany) Controlled terms:Air pollution - Dust - Heavy metals - Industrial railroads - Railroad stations - Risk assessment - Spatial distribution Uncontrolled terms:Biological enrichments - Dust accumulation - Heavy metal pollutants - Heavy metal pollution - Municipal government - Ophiopogon Japonicus - Pollution load indices - Potential ecological risk Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 531 Metallurgy and Metallography - 681.1 Railway Plant and Structures, General - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 2.40e+01%, Size 3.00e+00m DOI:10.13227/j.hjkx.202001126 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008932 Title:Pollution and Source Analysis of Heavy Metal in Surface Dust from Xi'an University Campuses Title of translation:西安市高校校园地表灰尘重金属污染来源解析 Authors:Fan, Xin-Yao (1); Lu, Xin-Wei (1); Liu, Hui-Min (1); Qin, Qing (1) Author affiliation:(1) College of Geography and Tourism, Shaanxi Normal University, Xi'an; 710119, China Corresponding author:Lu, Xin-Wei(luxinwei@snnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3556-3562 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Surface dust samples were collected from university campuses in Xi'an, and X-ray fluorescent spectrometry was used to determine the contents of nine heavy metals (Mn, As, Pb, Cr, Co, Ni, Cu, V, and Zn). Enrichment factors were subsequently used to determine the enrichment degree of each element and the preliminary determination of the pollution sources. The R programming language and SPSS were used for cluster analysis and principal components analysis to identify the pollution sources. The results showed that the average concentrations of all nine heavy metal elements were higher than their surface soil background values in Shaanxi Province; however, Mn, Co, As, V, and Ni exhibited relatively little enrichment and were less affected by human interference. Cr and Cu were moderately enriched, whereas Zn and Pb were significantly enriched, and human activities played a major role in the enrichment of these four elements. The main sources of Mn, Co, As, V, and Ni in surface dust samples from the university campuses were natural sources, whereas the accumulation of Zn, Cr, and Pb were mainly due to traffic sources, and Cu originated both from the auto repair industry and from paint coatings.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Metal analysis Controlled terms:Air pollution - Automotive industry - Cluster analysis - Dust - Lead Uncontrolled terms:Average concentration - Background value - Enrichment factors - Heavy metal elements - Human interference - Pollution sources - Principal components analysis - University campus Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 546.1 Lead and Alloys - 723 Computer Software, Data Handling and Applications DOI:10.13227/j.hjkx.201912041 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008893 Title:Effects of the Combined Application of Organic and Inorganic fertilizers on N2O Emissions from Saline Soil Title of translation:有机无机肥配施对不同程度盐渍土N2O排放的影响 Authors:Zhou, Hui (1, 2); Shi, Hai-Bin (1, 2); Guo, Jia-Wei (1, 2); Zhang, Wen-Cong (1, 2); Wang, Wei-Gang (1, 2) Author affiliation:(1) College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot; 010018, China; (2) Institute of Water-saving Agricultural and Soil-water Environment in Arid area, Inner Mongolia Agricultural University, Hohhot; 010018, China Corresponding author:Shi, Hai-Bin(shb@imau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3811-3821 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Combining organic fertilizer with chemical fertilizer may affect the microbial processes related to nitrous oxide (N2O) emissions under different degrees of soil salinization. A mild saline soil (S1; electrical conductivity (EC) 0.46 dS•m^-1) and moderate saline soil (S2; EC 1. 07 dS•m^-1) in the Hetao irrigation district of Inner Mongolia were selected. Under equal N rates, the study involved five treatments: U1 (240 kg•hm^-2of chemical fertilizer), U3O1 (180 kg•hm^-2 of chemical fertilizer+60 kg•hm^-2 of organic fertilizer), U1O1 (120 kg•hm^-2of chemical fertilizer+120 kg•hm^-2of organic fertilizer), U1O3 (60 kg•hm^-2of chemical fertilizer+180 kg•hm^-2of organic fertilizer), and O1 (240 kg•hm^-2of organic fertilizer). In addition, a blank control treatment (CK) was employed to investigate the effects of different fertilization treatments on the N2O emissions from the two saline soils. The results showed that the total N2O emissions from the S2 soil in the same treatment were between 11.86% and 47.23% higher than those from the S1 soil (P<0.05). the dynamic trend of the soil N2O fluxes among the different treatments were similar. The peak N2O emissions occurred after fertilization, and the N2O cumulative emission fluxes accounted for nearly 60% of the emissions during the entire growth period. The proper application of organic fertilizer could significantly reduce the soil N2O emission; the S1 and S2 saline soils treated with U1O1 and O1, respectively, had the lowest N2O emissions, whereby there were significant reductions of 33.62% and 28.51% in comparison to the U1 treatment (P<0.05). Moreover, higher maize yields could be obtained and the N2O flux was significantly positively correlated with the NH4⁺-N content (P<0.01) but negatively correlated with the NO3^--N content. The results demonstrated that nitrification was the main way to produce N2O in the studied salinized maize farmland, and that the addition of organic fertilizer could reduce the N2O production by decreasing the soil NH4⁺-N content. Based on the changes in the corn yield and a reduction in the greenhouse effect, suitable organic and inorganic fertilizer management models for the Hetao irrigation area were the mild saline soil: 120 kg•hm^-2of urea +120 kg•hm^-2of organic fertilizer), and the moderate saline soil: 240 kg•hm^-2of organic fertilizer.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Fertilizers Controlled terms:Greenhouse effect - Irrigation - Nitrogen oxides - Soils - Urea Uncontrolled terms:Chemical fertilizers - Control treatments - Cumulative emissions - Different treatments - Electrical conductivity - Hetao irrigation districts - Inorganic fertilizers - Organic fertilizers Classification code:451 Air Pollution - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 821.3 Agricultural Methods Numerical data indexing:Percentage 1.19e+01% to 4.72e+01%, Percentage 2.85e+01%, Percentage 3.36e+01%, Percentage 6.00e+01% DOI:10.13227/j.hjkx.202002046 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106059 Title:Evaluation and Screening of Dioxin Control Technology in Waste Incineration Flue Gas Title of translation:垃圾焚烧烟气中二英控制技术的评估与筛选 Authors:Zhao, Si-Lan (1, 2); Xi, Peng-Fei (3); Guo, Feng-Yan (2); Deng, Shuang (2); Jia, Jian-Li (1) Author affiliation:(1) School of Chemistry and Environmental Engineering, China University of Mining and Technology, Beijing; 100083, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Chongqing Purple Light Chemical Co., Chongqing; 401121, China Corresponding author:Deng, Shuang(dengshuang@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3985-3992 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To determine the best control technology for dioxin in waste incineration flue gas, a three-level comprehensive evaluation index system with environment, economy, and technology as the first-level indexes was constructed. The fuzzy comprehensive evaluation method and the analytic hierarchy process (AHP) were used to evaluate ten dioxin pollution control technologies or technology groups including "double bag activated carbon adsorption technology," "sulfur and sulfide inhibition technology," and "sulfur and sulfide inhibition technology+activated carbon fixed bed reactor technology". The "sulfur and sulfur compound inhibition technology+activated carbon fixed bed technology" scored the highest, and thus is currently the best control technology for dioxin pollution in waste incineration exhaust gas. This technology is suitable for small rural waste incinerators to ensure that dioxin emissions meet the standards. Depending on the local economic development level, enterprise scale, furnace profile, and technological process, waste incineration enterprises in various regions of China can adopt this index evaluation system and method to evaluate the dioxin control technologies and select the best one suitable for the enterprise so that dioxin emissions in the waste incineration flue gas can be effectively controlled.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Waste incineration Controlled terms:Activated carbon - Air pollution - Analytic hierarchy process - Chemical reactors - Economics - Flue gases - Flues - Gas emissions - Organic pollutants - Pollution control - Sulfur compounds Uncontrolled terms:Activated carbon adsorption - Analytic hierarchy process (ahp) - Comprehensive evaluation index system - Control technologies - Fuzzy comprehensive evaluation method - Local economic development - Pollution control technology - Technological process Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 452.4 Industrial Wastes Treatment and Disposal - 802.1 Chemical Plants and Equipment - 804 Chemical Products Generally - 804.1 Organic Compounds - 961 Systems Science - 971 Social Sciences DOI:10.13227/j.hjkx.202002170 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256299 Title:Effects of Different Rotation Patterns of Oil-Rice on Methane and Nitrous Oxide Emissions in Rice Fields Title of translation:稻油不同轮作模式对农田甲烷和氧化亚氮排放的影响 Authors:Chen, You-De (1); Zhao, Yang (1); Gao, Du-Juan (1); Luo, Xian-Fu (1); Cui, Ting (2); Tong, Zhong-Quan (2); Wu, Jia-Mei (3) Author affiliation:(1) Hunan Rice Research Institute, Changsha; 410125, China; (2) Nanxian Agricultural and Rural Bureau, Nanxian; 413200, China; (3) Hunan Engineering Research Center for Prevention and Control of Agricultural Non-point Source Pollution in the Basin of Lake Dongting, Institute of Agriculture Environment and Ecology, Hunan Academy of Agricultural Science, Changsha; 410125, China Corresponding author:Wu, Jia-Mei(waloe@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4701-4710 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A field experiment was carried out to investigate the effects of different rice-rape rotation systems on methane and nitrous oxide emissions, which were measured using the static chamber/gas chromatography method, prediction of their global warming potentials (GWP), and greenhouse gas intensity (GHGI) in paddy fields. The results showed that the average cumulative emissions of CH4from a double cropping paddy field, single season rice field (including middle or late), rape field, and leisure land were 135.25, 55.64, 5.05, and 1.89 kg•hm^-2, respectively. The CH4 emission during the rice season accounted for 91.8%-98.5% of the annual CH4 emission in different rotation years, and the contents of dissolved organic carbon in paddy soil exhibited a significantly positive correlation with CH4 emission. The CH4 emission in conventional late rice paddy was 18.7% higher than that of hybrid late rice paddy (P<0.05). The average cumulative emissions of N2O from double cropping paddy field, single season rice field (including middle or late), rape field, and leisure land were 0.94, 0.64, 1.38, and 0.24 kg•hm^-2, respectively. Out of the total annual N2O emission, 57.2% to 70.2% was from the rape field; 17.8% and 30.6% was due to the winter fallow treatments with previous crop type of double corpping rice and single season rice, respectively. There was no significant difference in N2O emission between hybrid rice and conventional rice paddy fields. The GWP of double cropping rice-winter fallow and double cropping rice-rape was higher than that of rice-rape and rice-winter fallow, and the GWP of CH4 in rice season accounted for 71.2% to 90.9% of the annual GWP of rotation. The highest treatment of GHGI was rice-rice-rape, and the treatment of rice-oil and rice-winter slack was lower. According to the comprehensive environmental and economic benefits, the late hybrid rice-rape patterns should be selected to reduce greenhouse gases in multiple cropping rice fields of South China.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Gas emissions Controlled terms:Gas chromatography - Global warming - Greenhouse gases - Leisure - Methane - Nitrogen oxides - Organic carbon - Rotation Uncontrolled terms:Cumulative emissions - Dissolved organic carbon - Economic benefits - Field experiment - Global warming potential - Nitrous oxide emissions - Positive correlations - Rotation pattern Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 802.3 Chemical Operations - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 931.1 Mechanics Numerical data indexing:Percentage 1.78e+01%, Percentage 1.87e+01%, Percentage 3.06e+01%, Percentage 5.72e+01% to 7.02e+01%, Percentage 7.12e+01% to 9.09e+01%, Percentage 9.18e+01% to 9.85e+01% DOI:10.13227/j.hjkx.202002107 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368671 Title:Selenium Uptake Characteristics of Reclaimed Soil-Crop from Mining Wasteland and Its Antagonistic Effects on Heavy Metals Title of translation:矿业废弃地复垦土壤-作物硒吸收特征及其对重金属拮抗效应 Authors:Yin, Bing (1); Wang, Jian-Fei (1, 2); Shi, Sheng (2); Bu, Zhong-Yuan (1); Huo, Tian-Man (2); Zhang, Shi-Wen (1) Author affiliation:(1) School of Earth and Environment, Anhui University of Science and Technology, Huainan; 232001, China; (2) College of Resource and Environment, Anhui Science and Technology University, Chuzhou; 233100, China Corresponding author:Zhang, Shi-Wen(mamin1190@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1904-1913 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To fully exploit selenium-rich land resources and ensure crop safety, the phenomenon of "double high" of Se and heavy metals in reclaimed soil of mining wasteland was studied. Soil and maize samples collected from "point-to-point" were weighted by the inverse distance weighted (IDW) method; multiple linear regression (MLR), partial least squares regression (PLSR), random forest regression (RFR), and other methods were used to predict selenium uptake by maize in a sulfur mine reclamation area in southwest China. Meanwhile, the antagonistic effects of selenium (Se) on heavy metals (Hg, As, Cd, and Cr) were analyzed. The results showed that the soil in the study area was rich in selenium resources. The average Se content in the soil reached 0.83 mg•kg^-1, which was 2.87 times that of the average Se content in Chinese soil. The Se content in maize grains ranged from 0.02 mg•kg^-1 to 0.16 mg•kg^-1. According to correlation analysis and model prediction, the main influencing factors of selenium content in maize grains in the study area were soil selenium, pH value, organic matter, and heavy metal As. Multivariate linear regression (MLR) was the most effective method for predicting selenium content in maize grains, and the determinant coefficient R² was 0.52. By comparing the enrichment characteristics of maize to heavy metals (Hg, As, Cd, and Cr) under different concentration gradients of Se in the soil of the study area, the results showed that Se had antagonistic effects on Hg, As, Cd, and Cr. The results can provide a basis for the development of selenium-rich agriculture in similar mining wasteland reclamation in the future.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Selenium Controlled terms:Agricultural robots - Crops - Decision trees - Forecasting - Grain (agricultural product) - Heavy metals - Inverse problems - Land reclamation - Least squares approximations - Linear regression - Reclamation - Soils Uncontrolled terms:Antagonistic effects - Enrichment characteristics - Inverse distance weighted - Maize - Multiple linear regressions - Multivariate linear regressions - Partial least squares regressions (PLSR) - Reclaimed soil Classification code:442.2 Land Reclamation - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4 Agricultural Products - 921.6 Numerical Methods - 922.2 Mathematical Statistics - 961 Systems Science DOI:10.13227/j.hjkx.201910034 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106254 Title:Hydrochemical Characteristics and Possible Controls of the Surface Water in Ranwu Lake Basin Title of translation:然乌湖流域地表水水化学特征及控制因素 Authors:Zhang, Tao (1); Wang, Ming-Guo (1); Zhang, Zhi-Yin (1); Liu, Ting (1); He, Jin (1) Author affiliation:(1) Center for Hydrogeology and Environmental Geology, China Geological Survey, Baoding; 071051, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4003-4010 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the chemistry of surface water and potential control measures in the Ranwu Lake basin, 19 samples were collected from Ranwu Lake in 2019. Conventional hydrochemical techniques and statistical analysis methods (descriptive statistics, the Gibbs figure, ion ratio, Piper triangular diagrams) were applied to better understand the solute geochemistry and surface water hydrochemistry in the Ranwu Lake catchment. Surface water in the Ranwu catchment is slightly alkaline (pH of the samples ranged from 7.54 to 8.48 with an average value of 8.06). The concentrations of total dissolved solids (TDS) in the water range from 59.89 to 96.75 mg•L^-1with an average of 79.98 mg•L^-1, the total dissolved solids of all samples are less than 100 mg•L^-1 and belong to fresh water. The TDS are dominated by Ca²⁺, Mg²⁺, HCO3^-, and SO4^2- in the Ranwu Lake. The ion concentrations in the lake water samples are in the order of Ca²⁺>Mg²⁺>Na⁺>K⁺. The concentrations of Na⁺and K⁺are very low. Ranging from 0.5 to 1.21 mg•L^-1, with an average value of 0.58 mg•L^-1, the equivalent concentration of Ca²⁺ accounts for 63.3% to 76.2% of total cations with an average value of 67.2%. The equivalent concentration of Mg²⁺ accounts for 23.4% to 36.2% of total cations with an average value of 31.4%. Ca²⁺ and Mg²⁺ account for 98.5% of total cations. The main anions were HCO3^- and SO4^2-. The equivalent concentration of HCO3^-accounts for 74.31% to 84.29% of total anions with an average value of 78.21%. The equivalent concentration of SO4^2- accounts for 9.59% to 19.37% of total anions with an average value of 15.34%. HCO3^- and SO4^2- together account for 93.55% of total anions on average. All the water samples fall in the water-rock interaction field, which suggests that the weathering of rocks primarily controls the major ion chemistry of groundwater in this area. Solutes are mainly derived from carbonate weathering and silicate weathering. The role of cation exchange in the geochemical process of the lake and the influence of human activities on the lake are found to be weak.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Weathering Controlled terms:Alkalinity - Catchments - Groundwater - Groundwater geochemistry - Hydrochemistry - Lakes - Positive ions - Runoff - Silicates Uncontrolled terms:Carbonate weathering - Descriptive statistics - Equivalent concentrations - Hydrochemical characteristics - Major ion chemistry - Statistical analysis methods - Total dissolved solids - Water rock interactions Classification code:444.1 Surface Water - 444.2 Groundwater - 481.2 Geochemistry - 801.1 Chemistry, General Numerical data indexing:Mass_Density 1.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-04kg/m3 to 1.21e-03kg/m3, Mass_Density 5.80e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 8.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.53e+01%, Percentage 2.34e+01% to 3.62e+01%, Percentage 3.14e+01%, Percentage 6.33e+01% to 7.62e+01%, Percentage 6.72e+01%, Percentage 7.43e+01% to 8.43e+01%, Percentage 7.82e+01%, Percentage 9.35e+01%, Percentage 9.59e+00% to 1.94e+01%, Percentage 9.85e+01% DOI:10.13227/j.hjkx.202002080 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861982 Title:Main Influencing Factors and Strengthening of Anaerobic Transformation of Excess Sludge in China Title of translation:我国剩余污泥厌氧消化的主要影响因素及强化 Authors:Dong, Bin (1); Gao, Jun (1); Chen, Si-Si (1); Yang, Dian-Hai (1); Dai, Xiao-Hu (1) Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China Corresponding author:Chen, Si-Si(chensisi@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3384-3391 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The anaerobic conversion efficiency of excess sludge in China is significantly lower than that in developed countries. Sludge characteristics are important influencing factors in the anaerobic degradability of sludge. The typical differences between excess sludge in China and in developed countries are mainly reflected in three aspects: long sludge age, high content of micro-sized grits, and high content of metal ions. Therefore, the effects of sludge age, micro-sized grits (represented by silica particles), and metal ions on the anaerobic digestion (AD) of excess sludge were studied systematically. Quantified comparison and targeted enhancement research were also carried out. The results showed that the negative effect of grit in the influent on VS reduction of sludge during AD was not obvious, while sludge age and metal ions were the main inhibitory factors. In addition, the inhibition level of sludge age was significantly higher than that of metal ions (P<0.05). With an increase in sludge age, the inhibition level of metal ions showed a further strengthening trend. Therefore, it could be concluded that long sludge age was the most important factor limiting the degradability of excess sludge. Moreover, with thermal hydrolysis pretreatment (160℃, 0.55 MPa, 30 min), the cumulative methane yield and VS reduction of sludge with long sludge age (40 d) almost increased to the values of sludge with a sludge age of 5 d. That is, thermal hydrolysis pretreatment has the potential to break through the bottleneck of degradability of sludge caused by long sludge age.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Sludge digestion Controlled terms:Anaerobic digestion - Hydrolysis - Metal ions - Metals - Silica - Strengthening (metal) Uncontrolled terms:Anaerobic transformations - Degradability - Developed countries - Excess sludge - Methane Yield - Silica particles - Sludge characteristics - Thermal hydrolysis pretreatment Classification code:452.2 Sewage Treatment - 531.1 Metallurgy - 802.2 Chemical Reactions Numerical data indexing:Pressure 5.50e+05Pa, Time 1.80e+03s DOI:10.13227/j.hjkx.201912054 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517756 Title:Transfer Factor and Health Risk Assessment of Heavy Metals in a Soil-Crop System in a High Incidence Area of Nasopharyngeal Carcinoma, Guangdong Title of translation:广东鼻咽癌高发区土壤-作物系统重金属迁移特征及健康风险评价 Authors:Ye, Mai (1); Zhang, Jing-Ru (1); Zhang, Lu-Lu (1); Li, Zhao-Hui (1); Li, Xing-Yuan (2); Zhou, Yong-Zhang (2) Author affiliation:(1) Guangdong Provincial Academy of Environmental Sciences, Guangzhou; 510045, China; (2) Guangdong Provincial Key Laboratory of Geological Process and Mineral Resources Exploration, Sun Yat-sen University, Guangzhou; 510275, China Corresponding author:Zhang, Jing-Ru(419892286@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5579-5588 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to reveal the transfer factor and perform health risk assessments of heavy metals in soil-crop systems in the high incidence area of nasopharyngeal carcinoma (NPC) in Guangdong province of China, the farmland system of Sihui City in the high incidence area of NPC was selected as the research object, and rice, lettuce, and corresponding soil samples were collected. As, Cu, Hg, Mn, Ni, Pb, and Cd in the soil and crop samples were analyzed. Based on the contents and chemical forms of seven heavy metals, the environmental pollution, bioavailability, and transfer factors of heavy metals in the soil-crop system were assessed using statistical analyses, pollution index evaluations, and transfer factor methods, and the health risks of adults and children in the study area were assessed using the health risk assessment model recommended by the U.S. Environmental Protection Agency. The results showed that the farmland soil in the study area was basically clean (P=0.43); Cd and Mn mainly existed in a bioavailable state, Hg mainly existed in a potentially available state, and As Cu, Ni, and Pb mainly existed in a residual state. The lettuce was safe (P=0.48), while the pollution index of rice (P=7.66) was higher than that of lettuce, and the main polluting element was Pb (PI=10.25). The results of soil pollution assessments are not completely consistent with those of crop pollution assessments, so they should be combined with the bioavailability of heavy metals and crop effects for correlation analyses. Cd and Cu are more easily absorbed by lettuce, while Cd, Cu, and As are more easily enriched by rice. Special attention should be paid to Cd and Cu pollution in farmland soils, and As pollution should be of focus in paddy fields. In the study area, the non-carcinogenic risk index (HI) value of edible lettuce for adults and children was less than 1 and the average value of the total carcinogenic risk index (Risk) of edible lettuce was less than 1×10^-4. Therefore, the health risk of edible local lettuce was within the acceptable range. The average HI index of rice for adults and children was more than 1 and the main non-carcinogenic factor was Pb; the risk index of rice was more than 1×10^-4, and the main carcinogenic factor was As. Rice consumption in the study area will cause certain health risks, and the threat to adults is greater than that to children. Therefore, As in rice may be related to the high incidence of NPC in Sihui City. It is suggested that the remediation of heavy metals in farmland soils be strengthened or that residents be forbidden to plant or eat local rice and other crops with greater health risks.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Risk assessment Controlled terms:Biochemistry - Cadmium - Chemical analysis - Copper - Crops - Environmental Protection Agency - Farms - Health - Health risks - Lead - Soil pollution - Soils Uncontrolled terms:Correlation analysis - Environmental pollutions - Guangdong Province - Heavy metals in soil - Nasopharyngeal carcinoma - Pollution assessment - Soil pollution assessments - U.S. Environmental Protection Agency Classification code:454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 544.1 Copper - 546.1 Lead and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.202005053 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861803 Title:Emission Characteristics of Light-Duty Gasoline Vehicle Exhaust Based on Acceleration Simulation Mode Title of translation:轻型汽油车稳态工况下的尾气排放特征 Authors:Xie, Yan (1); Liao, Song-Di (1); Zhu, Man-Ni (1); Wang, Yi-Ran (1); Wang, Ri-Chao (1); Zhang, Li-Hang (1); Yu, Fei (2); Zhong, Zhuang-Min (2); Bai, Li (3); Huang, Jiang-Rong (3); Liu, Jun-Wen (2); Zheng, Jun-Yu (1, 2) Author affiliation:(1) College of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Institute for Environment and Climate Research, Jinan University, Guangzhou; 511443, China; (3) Guangdong Environmental Monitoring Center, Guangzhou; 510308, China Corresponding author:Zheng, Jun-Yu(zheng.junyu@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3112-3120 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, 127 light-duty gasoline cars and 10 light-duty gasoline trucks with different emission standards were selected to explore the influences of different conditions and vehicle parameters on the emission characteristics of carbon dioxide (CO2), carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons (HC), and methane (CH4) using a portable emission measurement system based on a chassis dynamometer under acceleration simulation mode. The results showed that the gaseous pollutants of light-duty gasoline vehicles displayed a relatively lower emission rate under the idle condition, which accounted for only 22.9% and 25.8% of the emission rate at the accelerated condition and constant speed condition, respectively. The pollutant emission characteristics were closely related to the working conditions. The emission rates of CO2 and NOx in the accelerated condition were less than those at the constant speed condition, while the emission rates of CO, HC, and CH4 in the accelerated condition were higher than those at the constant speed condition. In the constant low-speed condition, the emission factors of CO2, CO, NOx, HC, and CH4 were 383.20, 2.98, 1.60, 0.14, and 0.03 g•km^-1 for light-duty gasoline cars, respectively, and 360.66, 2.64, 1.61, 0.005 5, and 0.002 7 g•km^-1 for light-duty gasoline trucks, respectively. Tighter emission standards have caused significant reductions in emissions. The emission factors of CO, NOx, HC, and CH4 could be decreased by 87.5%, 97.3%, 97.9%, and 86.4%, respectively, from China Ⅰ to China Ⅴ. A non-linear relationship was found between the age, odometer, vehicle weight, and vehicular emissions. In addition, the engine displacement was positively correlated with vehicular emissions.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Gasoline Controlled terms:Automobiles - Carbon dioxide - Carbon monoxide - Dynamometers - Fog - Motor transportation - Nitrogen oxides - Particulate emissions - Pollution - Trucks Uncontrolled terms:Chassis dynamometers - Emission characteristics - Emission measurement systems - Engine displacement - Gaseous pollutants - Light duty gasoline vehicles - Non-linear relationships - Pollutant emission Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 523 Liquid Fuels - 662.1 Automobiles - 663.1 Heavy Duty Motor Vehicles - 804.2 Inorganic Compounds - 943.1 Mechanical Instruments Numerical data indexing:Percentage 2.29e+01%, Percentage 2.58e+01%, Percentage 8.64e+01%, Percentage 8.75e+01%, Percentage 9.73e+01%, Percentage 9.79e+01% DOI:10.13227/j.hjkx.201912002 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953433 Title:Advances in Microbe-Derived Taste and Odor Compounds in Typical Aquatic Ecosystems Title of translation:典型水环境微生物源异嗅物研究进展 Authors:Zhang, Hai-Han (1); Miao, Yu-Tian (1); Huang, Ting-Lin (1); Liu, Kai-Wen (1); Liu, Xiang (1); Huang, Xin (1); Yang, Shang-Ye (1); Si, Fan (1); Li, Cheng-Yao (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:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5201-5214 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Olfactory microorganisms mainly include actinomycetes, algae, and myxobacteria, and are widely found in typical water ecosystems such as water source reservoirs, lakes, streams, and oceans. Biologically-derived taste and odor compounds can cause severe off-flavor problems at trace concentrations, threatening the safety of water supplies. Physical and chemical methods have been implemented, but they need to be improved and optimized. Microbial methods show attractive prospects due to their environmentally friendly characteristics. This article reviews the literature regarding the types, biological sources, detection methods, control measures, influencing factors, and odor-producing mechanisms of microbial methods. Future research directions and fields of investigation are discussed in order to promote the related research of taste and odor compounds and ensure the safety of urban water supplies.
© 2020, Science Press. All right reserved. Number of references:117 Main heading:Aquatic ecosystems Controlled terms:Bacteria - Flavor compounds - Hydrogeology - Odor control - Reservoirs (water) - Water supply Uncontrolled terms:Biological sources - Control measures - Detection methods - Future research directions - Microbial method - Trace concentrations - Urban water supply - Water ecosystems Classification code:441.2 Reservoirs - 446.1 Water Supply Systems - 454.3 Ecology and Ecosystems - 481.1 Geology - 822.3 Food Products DOI:10.13227/j.hjkx.202003135 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952734 Title:Effects of Heavy Metal-immobilizing Bacteria on Reducing Wheat Uptake Cd by Regulation Soil Iron Oxides Title of translation:重金属固定细菌调控土壤铁氧化物阻控小麦Cd吸收效应 Authors:Wang, Xiao-Yu (1); Han, Hui (1) Author affiliation:(1) Collaborative Innovation Center of Water Security for Water Source Region of Mid-route Project of South-North Water Diversion of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang; 473061, China Corresponding author:Han, Hui(17657311626@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5160-5167 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Iron oxides are widely distributed in soils and have large specific surface areas and strong affinities with heavy metals, and thus play a significant role in the transformation of heavy metals in soils. Pot experiments were conducted to study the effects of heavy metal-immobilizing bacteria Bacillus megaterium N3, Serratia liquefaciens H12, and strain N3 combination with H12 on the absorption of Cd by ZM-3 (Triticum aestivum L.). The effects of different treatments on soil pH, iron oxide content, and relative abundance of iron oxide bacteria, clay particle mineral composition, and aggregates in wheat rhizosphere were also measured. The results showed that strains N3, H12, and N3+H12 significantly (P<0.05) increased the dry weight (36.5%-75.3%) of wheat grains, and significantly (P<0.05) decreased the content of Cd (30.2%-84.9%) in wheat grains. Furthermore, compared with the single application of strain N3 or H12, the application of strain N3 combined with H12 had a stronger ability to reduce the absorption of Cd by ZM-3. The results suggested that strain N3, combined with H12, decreased the uptake of Cd in wheat by: (1)increasing the pH (from 6.74 to 7.08) of wheat rhizosphere soil; (2) increasing the Fe oxide (67.9%) and goethite contents of wheat rhizosphere soil; (3) increasing the relative abundance of iron-oxidizing bacteria (Leptothrix spp. and Gallionella spp.), and (4) increasing the content of small particle size (<0.25 mm) aggregates. The results provide a theoretical basis and technical support for the use of heavy metal-immobilizing bacteria to repair farmland contaminated by heavy metals.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Iron oxides Controlled terms:Aggregates - Bacteria - Bacteriology - Grain (agricultural product) - Heavy metals - Particle size - Soils - Strain Uncontrolled terms:Bacillus megaterium - Different treatments - Heavy metals in soil - Iron oxidizing bacteria - Large specific surface areas - Mineral composition - Serratia liquefaciens - Small particle size Classification code:406 Highway Engineering - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 804.2 Inorganic Compounds - 821.4 Agricultural Products - 951 Materials Science Numerical data indexing:Percentage 3.02e+01% to 8.49e+01%, Percentage 3.65e+01% to 7.53e+01%, Percentage 6.79e+01% DOI:10.13227/j.hjkx.202005235 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952754 Title:Effects of Temperature and Substrate Concentration on N2O Release of ANAMMOX Process Title of translation:温度和基质浓度对厌氧氨氧化工艺中N2O释放的影响 Authors:Wang, Si-Ke (1); Yu, Heng (1); Zuo, Jian-E (1) Author affiliation:(1) State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China Corresponding author:Zuo, Jian-E(jiane.zuo@mail.tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5082-5088 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The greenhouse gas N2O is released during the biological nitrogen removal process. ANAMMOX (anaerobic ammonium oxidation) is regarded as a promising nitrogen removal process for treating municipal wastewater, and the N2O emission patterns and mechanisms need further investigation. In this study, batch tests were performed to study the release of N2O at different temperatures and substrate concentrations, and the microbial mechanisms of N2O emission were discussed. The results showed that the increase of the influent substrate concentration of the ANAMMOX process promoted the release of N2O. At 35℃, when the influent nitrite increased from 40 mg•L^-1 to 60 mg•L^-1, 120 mg•L^-1, the maximum accumulated concentration of N2O increased from 0.5 mg•L^-1 to 1.5 mg•L^-1 and 2.4 mg•L^-1, accounting for 0.85%, 1.43%, and 1.11% of the total nitrogen removal, respectively. Lowering temperature had an obvious inhibitory effect on ANAMMOX activity. The specific ANAMMOX activity at 15℃ was only 6% of that at 30℃. Furthermore, the intracellular ATP concentration was reduced. At 15℃, the intracellular ATP concentration was 4% of that at 30℃. The decrease in temperature led to a decrease in the release of N2O in the ANAMMOX process. When the temperature decreased, the denitrification rate would decrease, leading to a lower N2O production rate and lower N2O accumulation. 16S rRNA amplicon sequencing showed that ANAMMOX bacteria Candidatus Brocadia and Ca. Jettenia were enriched, accounting for 6.9%-13.8% and 1.4%-2.6% of microbial community, respectively. Abundant heterotrophic bacteria were also found in the microbial community. The accumulation of N2O in the ANAMMOX process was mainly attributed to denitrifying bacteria producing and consuming N2O. This study provides support for controlling N2O emission during the ANAMMOX process for treating municipal wastewater.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Nitrogen removal Controlled terms:Bacteria - Denitrification - Greenhouse gases - RNA - Temperature - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Biological nitrogen removal process - Effects of temperature - Heterotrophic bacterias - Nitrogen removal process - Specific Anammox activity - Substrate concentrations - Total nitrogen removal Classification code:451.1 Air Pollution Sources - 452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 641.1 Thermodynamics - 802.2 Chemical Reactions Numerical data indexing:Mass_Density 1.20e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 2.40e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e-02kg/m3 to 6.00e-02kg/m3, Mass_Density 5.00e-04kg/m3 to 1.50e-03kg/m3, Percentage 1.11e+00%, Percentage 1.40e+00% to 2.60e+00%, Percentage 1.43e+00%, Percentage 4.00e+00%, Percentage 6.00e+00%, Percentage 6.90e+00% to 1.38e+01%, Percentage 8.50e-01% DOI:10.13227/j.hjkx.202004267 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952748 Title:Effects of Phytoplankton Classifications on the Relationship Between Phytoplankton Community and Environment in Summer Subtropical Reservoirs, Southern China Title of translation:类群划分方法对南亚热带水库夏季浮游植物群落与环境响应关系的影响 Authors:Guo, Fang (1); Gu, Ji-Guang (1); Zhao, Jian (2); Yu, Hua-Zhang (2); Xiao, Li-Juan (1, 3) Author affiliation:(1) Institute of Hydrobiology, Jinan University, Guangzhou; 510632, China; (2) Shantou Suboffice, Hydrological Bureau of Guangdong Province, Shantou; 515041, China; (3) Guangdong Center for Control and Prevention of Reservoir Cyanobacterial Blooms, Guangzhou; 510632, China Corresponding author:Xiao, Li-Juan(tljxiao@jnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5050-5059 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Phytoplankton communities are sensitive to environmental changes and are used to assess water quality and ecosystem states. However, their responses to environment are affected by the classifications. To understand the impact of different classifications, the response relationship between phytoplankton communities and environment were compared with five phytoplankton classifications (species, genus, phyla, morphology-based functional groups, and functional groups) by investigating eight reservoirs in summer in the southern subtropical region. The eight reservoirs were mesotrophic and their environment was characterized by a high temperature (32.6±1.1)℃ and low light bioavailability (Zeu/Zm was 0.48±0.28). The variance of dissolved nutrients contributed to the main environmental differences between the eight reservoirs. The environmental gradient, in terms of dissolved nutrients concentration, was significantly higher than in terms of total nutritional status, temperature, and light bioavailability (P<0.05). The number of species and genus was higher but their biomass was lower than those of other classifications. This contributed to the higher Bray-Curtis distance and lower species gradient (SCBD) and location gradient (LCBD) of phytoplankton communities with species and genus classifications than other classifications. A statistical analysis showed that only the phytoplankton community gradient with MBFG and phylum classifications was significantly correlated with environmental gradient, in particular the gradient of pH value and PO4^3--P concentration. A significant regress was detected between the TSI gradient and the phytoplankton community gradient with MBFG and phylum classifications. In conclusion, as the variance of environment stemmed from the supply of nutrients, the response of the phytoplankton community classified with MBFG and phylum was more sensitive than other classifications.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Phytoplankton Controlled terms:Biochemistry - Nutrients - Reservoirs (water) - Tropics - Water quality Uncontrolled terms:Dissolved nutrients - Environmental change - Environmental difference - Environmental gradient - High temperature - Number of species - Phytoplankton community - Subtropical regions Classification code:441.2 Reservoirs - 443 Meteorology - 445.2 Water Analysis - 471 Marine Science and Oceanography - 801.2 Biochemistry DOI:10.13227/j.hjkx.202005106 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070241 Title:Denitrification Process and N2O Production Characteristics of Heterotrophic Nitrifying Bacterium Pseudomonas aeruginosa YL Title of translation:异养硝化细菌Pseudomonas aeruginosa YL的脱氮过程及N2O产生特性 Authors:Yang, Lei (1, 2); Cui, Shen (1, 2); Ren, Yong-Xiang (1, 2); Guo, Lin-Kai (1, 2); Zhang, Zhi-Hao (1, 2); Xiao, Qian (3); Chen, Ning (1, 2); Wang, Xu-Hui (1, 2) Author affiliation:(1) Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) China ENFI Engineering Co., Ltd., Chengdu Branch, Chengdu; 610000, China Corresponding author:Ren, Yong-Xiang(ryx@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:831-838 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Because of the massive discharge of nitrogenous wastewater, the eutrophication of a water body is becoming increasingly serious, and how to effectively remove nitrogen from this wastewater remains an urgent problem to be solved. In this study, due to disadvantages in the traditional biological nitrogen removal process, such as complex and long procedures, high energy consumption, weak impact resistance, and N2O release, the nitrogen removal theory by heterotrophic nitrification was further analyzed by discussing the physiological-biochemical, heterotrophic nitrification-aerobic denitrification, and N2O production characteristics of a high-efficiency heterotrophic nitrifying bacteria Pseudomonas aeruginosa YL. Results show that the strain YL had an eminent heterotrophic nitrification and aerobic denitrification ability, and NH4⁺-N, NO2^--N, and NO3^--N with concentration of 100 mg•L^-1could be completely removed during the 24-hour incubation period. There was almost no intermediate product in the process of heterotrophic nitrification, however when NO3^--N was used as nitrogen source, the accumulation of NO2^--N reached 25.55 mg•L^-1. Meanwhile, the successful expression of denitrification genes napA, nirK, and nosZ further confirmed the aerobic denitrification ability of strain YL. Gaseous nitrogen products accounted for about 30%-40% of removed TN in the heterotrophic nitrification-aerobic denitrification process by strain YL, and N2 was the main denitrification product. When NH4⁺-N, NO2^--N, and NO3^--N were used as the sole nitrogen source, N2 production amounted to 3.46, 3.49, and 3.36 mg, respectively. In contrast, only small amounts of N2O were produced in the denitrification process by strain YL, and the total amount was 6.63 μg when NH4⁺-N was the nitrogen source, which was much lower than in the cases of NO2^--N and NO3^--N as the sole nitrogen source. In addition, high C/N, low pH, high temperature, high NH4⁺-N, and high NO2^--N conditions could result in more N2O generation. Nevertheless, most environmental factors had little effect on N2O production of strain YL, and the maximum N2O production was significantly lower than that of short-cut nitrification system and autotrophic nitrification system. These results demonstrated that strain YL exhibited excellent abilities of nitrogen removal, N2O emission control, and tolerance to environmental conditions, and could be an effective candidate for treating wastewater without secondary air pollution.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Nitrification Controlled terms:Aerobic bacteria - Denitrification - Emission control - Energy utilization - Eutrophication - Genes - Nitrogen oxides - Nitrogen removal - Wastewater treatment Uncontrolled terms:Aerobic denitrification - Biological nitrogen removal process - Environmental conditions - Functional genes - Heterotrophic nitrification - Heterotrophic nitrification-aerobic denitrifications - Nitrifying bacteria - Production characteristics Classification code:451.2 Air Pollution Control - 452.4 Industrial Wastes Treatment and Disposal - 461 Bioengineering and Biology - 461.2 Biological Materials and Tissue Engineering - 525.3 Energy Utilization - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Mass 3.36e-06kg, Mass 6.63e-09kg, Mass_Density 2.55e-02kg/m3 to 2.20e-02kg/m3, Percentage 3.00e+01% to 4.00e+01%, Time 8.64e+04s DOI:10.13227/j.hjkx.201908223 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070248 Title:Influencing Factors of Long-term Variations on Gridded PM2.5 of Typical Regions in China Based on GAM Model Title of translation:基于GAM模型分析中国典型区域网格化PM2.5长期变化影响因素 Authors:Nan, Yang (1); Zhang, Qian-Qian (2); Zhang, Bi-Hui (1) Author affiliation:(1) National Meteorological Center, Beijing; 100081, China; (2) National Satellite Meteorological Center, Beijing; 100081, China Corresponding author:Zhang, Bi-Hui(zhangbh@cma.gov.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:499-509 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study investigates annually-averaged surface PM2.5 concentrations with the spatial resolution of 0.01°×0.01° to explore spatio-temporal variations and influencing factors of annual PM2.5 over typical regions in China during the period of 1998-2016, applying the generalized additive model (GAM). Regionally-averaged PM2.5 concentrations of five typical regions are ranked from high to low as follows: East China (40.5 μg•m^-3)>North China (37.4 μg•m^-3)>South China (27.8 μg•m^-3)>Northeast China (23.7 μg•m^-3)>Sichuan Basin (22.4 μg•m^-3). The PM2.5 over Northeast China showed a linear increasing trend, while in other regions, PM2.5 tended to increase from 1998 to 2007 and decrease after 2007. PM2.5 concentrations over typical regions were all stably distributed which clearly exhibited areas with high PM2.5 values. For the single influencing factor GAM model of PM2.5 concentration, all influencing factors passed the significance test. The most influential factors with regard to the variations in the PM2.5 concentration differed among typical regions. In the multiple-influencing-factors-GAM model of PM2.5 concentration, all factors exhibited a non-linear relationship with PM2.5, and they accounted for 87.5%-92% (average 89. 0%) of variations in the PM2.5 concentration, suggesting a good model fit. The most significant influencing factors on PM2.5 concentrations were YEAR and LON-LAT in all typical regions. Meteorological factors have different impacts on PM2.5 concentrations among the typical regions. The three most influential meteorological factors in the five typical regions ranked from high to low are as follows: tp>v10>ssr for Northeast China; temp>tp>msl for North China; temp>tp>ssr for East and Central China; temp>RH>blh for South China; tp>temp>u10 for the Sichuan Basin. Our results demonstrated that the GAM model could quantitatively analyze influencing factors in long-term variations of the regional PM2.5 concentration, which is important for the assessment of PM2.5 pollution.
© 2020, Science Press. All right reserved. Number of references:36 Uncontrolled terms:Generalized additive model - Influencing factors - Influential factors - Meteorological factors - Non-linear relationships - PM2.5 - Spatio-temporal variation - Typical regions Numerical data indexing:Percentage 0.00e+00%, Percentage 8.75e+01% to 9.20e+01% DOI:10.13227/j.hjkx.201905090 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861776 Title:Emission Characteristics and Risk Assessment of Volatile Organic Compounds from Typical Factories in Zhengzhou Title of translation:郑州市典型工业企业VOCs排放特征及风险评估 Authors:Qi, Yi-Jin (1); Ni, Jing-Wei (1); Zhao, Dong-Xu (1); Yang, Yi (1); Han, Li-Yan (1); Li, Bo-Wei (2) Author affiliation:(1) Henan Haihong Ecological Technology Co., Ltd., Zhengzhou; 450000, China; (2) College of Resources and Environmental, Zhejiang University, Hangzhou; 310058, China Corresponding author:Ni, Jing-Wei(nijingwei@hh12369.comemail0919489@zju.edu.cn)Li, Bo-Wei(0919489@zju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3056-3065 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the characteristics and potential hazards of volatile organic compounds (VOCs) emitted from different industrial factories in Zhengzhou, several representative factories have been selected for sample collection using canisters; the samples were subsequently analyzed by GC-MS/FID system, from which the composition and risk of VOCs are discussed in this study. It was found that OVOCs, especially ethyl acetate and isopropanol, were the most important species originating from printing factories, which accounted for more than 93.1% of total VOCs. The major components related to manufacturing industries, including automobile, furniture, and coating, were aromatics, mainly m/p-xylene, o-xylene, and ethylbenzene, which contributed 33.5%-90.0% to VOCs. Halogenated hydrocarbons made the largest contribution (52.3%) to VOCs in the food processing industry. The main components of VOCs were halogenoalkanes (25.5%) and alkanes (28.8%) in rubber factories. As for graphite carbon factories, the main components of VOCs were aromatics (28.5%) and alkanes (24.1%). Compared with previous studies, the VOC emission characteristics of factories involving solvent usage in Zhengzhou are consistent with those in other cities, but the compositional information of VOCs varies across different factories, even within the same industry, due to the different production processes and raw materials used. Risk assessment showed that the concentration of VOCs emitted from solvent factories are positively correlated with ozone formation potential (OFP) and the hazard index (HI). Specifically, benzene, toluene, ethylbenzene, xylene, and other C6-C8 aromatic hydrocarbons contributed significantly to OFP and HI. The HI values were 1.18 and 2.74 in automobile manufacturing factory NO.3 and wooden furniture factory NO.5, respectively, which were higher than the limits stated by EPA regulations because of the different production processes and raw materials, and the VOCs of the factories were mainly composed of aromatics; in particular, C6-C9 benzene series contributed significantly to HI and OFP. Therefore, it is necessary to control VOCs originating from industries involving solvent usage.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Rubber industry Controlled terms:Aromatization - Automotive industry - Benzene - Ethylbenzene - Food processing - Hazards - Manufacture - Organic solvents - Paraffins - Risk assessment - Rubber factories - Toluene - Volatile organic compounds - Xylene Uncontrolled terms:Automobile manufacturing - Compositional information - Emission characteristics - Food processing industry - Halogenated hydrocarbons - Manufacturing industries - Ozone formation potentials - Production process Classification code:537.1 Heat Treatment Processes - 802.2 Chemical Reactions - 804.1 Organic Compounds - 818.4 Rubber Factories and Machinery - 822.2 Food Processing Operations - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.41e+01%, Percentage 2.55e+01%, Percentage 2.85e+01%, Percentage 2.88e+01%, Percentage 3.35e+01% to 9.00e+01%, Percentage 5.23e+01%, Percentage 9.31e+01% DOI:10.13227/j.hjkx.201911106 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861763 Title:Characteristics and Influencing Factors of Monothioarsenate Adsorption on Goethite Title of translation:一硫代砷在针铁矿上的吸附及影响因素 Authors:Liao, Dan-Xue (1, 2); Shan, Hui-Mei (1, 2); Zhang, Jin-Xian (1, 2); Peng, San-Xi (3); Huang, Jian (1, 2); Chen, Hui (1, 2); Zhao, Chao-Ran (1, 2); Zeng, Chun-Ya (1, 2) Author affiliation:(1) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin; 541004, China; (2) Collaborative Innovation Center for Water Pollution Control and Water Security in Karst Areas, Guilin University of Technology, Guilin; 541004, China; (3) College of Earth Sciences, Guilin University of Technology, Guilin; 541004, China Corresponding author:Shan, Hui-Mei(shanhuimei@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3337-3344 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The adsorption kinetic of monothioarsenate (MTA) on goethite was characterized in this study, and batch experiments were then designed to further explore the effects of arsenate, arsenite, humic acid (HA), nitrate, and phosphate on the adsorption of MTA on goethite, and to identify the adsorption mechanism. The results showed that: ① When a single arsenic species was present in a solution, the adsorption equilibrium times of MTA, arsenate, and arsenite on goethite were 8, 2, and 4 h, respectively. The adsorption experimental data of these three arsenic species were well fitted to a pseudo-second-order kinetic model. The equilibrium adsorption capacities (qe) of MTA, arsenate, and arsenite on goethite were 2 129.851, 3 291.838, and 1 788.767 mg•kg^-1, respectively. When MTA coexisted with arsenate or arsenite in a solution, MTA adsorption on goethite continued to be well fitted to a pseudo-second-order kinetic model. The value of qe for MTA was significantly reduced to 1 236.941 mg•kg^-1 when MTA coexisted with arsenate, and to 1 532.287 mg•kg^-1 when MTA coexisted with arsenite, due to the fact that arsenate and arsenite competed for adsorption sites with MTA. ② With an increase in HA concentration (10-50 mg•L^-1), the qe of MTA decreased gradually, due to the fact that a large number of functional groups in HA preempted the surface adsorption sites of goethite with MTA. ③ When phosphate was added into the MTA solution, the qe values of MTA, arsenate, and arsenite on goethite were reduced greatly, to 492.802, 815.782, and 303.714 mg•kg^-1, respectively, which was caused by the competitive adsorption of P and As. When nitrate was added into the MTA solution, the number of electron receptors and Eh of the solution increased, leading to the qe values of MTA, arsenate, and arsenite on goethite increasing to 2 211.030, 3 444.023, and 1 835.537 mg•kg^-1, respectively.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Adsorption Controlled terms:Kinetic parameters - Kinetic theory - Nitrates Uncontrolled terms:Adsorption equilibria - Adsorption kinetics - Adsorption mechanism - Competitive adsorption - Equilibrium adsorption capacity - Number of electrons - Pseudo-second-order kinetic models - Surface adsorption Classification code:802.3 Chemical Operations - 804.2 Inorganic Compounds - 931 Classical Physics; Quantum Theory; Relativity Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 5.00e-02kg/m3, Time 1.44e+04s DOI:10.13227/j.hjkx.202001132 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796209 Title:Speciation Distribution and Risk Assessment of Heavy Metals in Sediments from the Yitong River City Area Title of translation:伊通河(城区段)沉积物重金属形态分布特征及风险评价 Authors:Jiang, Shi-Xin (1, 2); Zhai, Fu-Jie (2, 3); Zhang, Chao (2); Wang, Meng-Meng (2, 3); Shan, Bao-Qing (2) Author affiliation:(1) College of Energy and Environmental Engineering, Hebei University of Engineering, Handan; 056038, China; (2) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environment Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou; 450045, China Corresponding author:Shan, Bao-Qing(bqshan@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2653-2663 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The total content and chemical speciation of Cd, Cr, Cu, Ni, Pb, and Zn in seven short cores sampled from the Yitong River from Changchun City were analyzed to assess the pollution levels and potential ecological risks of heavy metals in the sediments. The results demonstrated that the total contents of Cd, Cr, Cu, Ni, Pb, and Zn in sediments were 0.10-1.18, 23.57-66.35, 11.27-43.95, 10.78-29.82, 15.02-60.81, and 54.27-175.83 mg•kg^-1, respectively. The acid-soluble fraction of Cd varied from 42.1% to 51.28%, whereas Cr, Ni, and Zn were mainly found in the residual fraction; their mass fractions were 63.54%-79.91%, 35.16%-53.75%, and 27.55%-57.55%, respectively. The vertical results of pollution degree and ecological risk assessment indicated that the studied sediment was polluted by Cd, Cu, Pb, and Zn, and the ecological risk of Cd was the highest, followed by Zn and Cu. Each group of metals in each core showed a similar vertical variation, and the ecological risk of metals in sediment of 4-8 cm depth was relatively high. Cd, Zn, and Pb in the sediments of Yitong River were mainly from industrial pollution and municipal sewage discharge, and Cu could be attributed to both natural processes and human activities, whereas Cr and Ni may be attributed to natural processes.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:River pollution Controlled terms:Chemical analysis - Chemical speciation - Heavy metals - Risk assessment - Rivers - Sediments - Sewage Uncontrolled terms:Acid-soluble fractions - Ecological risk assessment - Ecological risks - Human activities - Industrial pollution - Potential ecological risk - Residual fraction - Vertical variation Classification code:452.1 Sewage - 453 Water Pollution - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 802.2 Chemical Reactions - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.76e+01% to 5.75e+01%, Percentage 4.21e+01% to 5.13e+01%, Percentage 6.35e+01% to 7.99e+01%, Size 4.00e-02m to 8.00e-02m DOI:10.13227/j.hjkx.201910113 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796296 Title:Mixed State and Sources of Fine Particulate Matter in the Summer in Tianjin City Based on Single Particle Aerosol Mass Spectrometer (SPAMS) Title of translation:基于SPAMS的天津市夏季环境受体中颗粒物的混合状态及来源 Authors:Lin, Qiu-Ju (1); Xu, Jiao (1); Li, Mei (2); Wang, Wei (3); Shi, Guo-Liang (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; 300071, China; (2) Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou; 510632, China; (3) College of Computer Science, Nankai University, Tianjin; 300071, China Corresponding author:Shi, Guo-Liang(nksgl@nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2505-2518 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Tianjin is located in the Beijing-Tianjin-Hebei region. Recently, particulate matter pollution has received wide attention; therefore, studying the chemical composition and sources of particulate matter in the atmospheric environment is of great significance. To clarify the mixed state and possible sources of particulate matter in the summer ambient air in Tianjin, this study used single particle aerosol mass spectrometer (SPAMS) to collect 209 887 samples. Particle size and complete spectrometry information were collected in July 2017. A total of 369 particle classes were obtained with respect to clustering particles with similarities in mass spectrometry characteristics using ART-2a. Then, according to the similarity in the chemical composition (mass spectrometry) of the categories, 19 particulate matter categories were artificially merged: K-EC (0.20%), K-EC-Sec (0.18%), K-NO3-PO3(12.00%), K-NO3-SiO3(2.98%), K-Sec (0.16%), EC (39.60%), EC-Sec (3.46%), EC-HM-Sec (3.93%), HEC (1.49%), HEC-Sec (1.38%), OC-Amine-Sec (3.58%), OC-Sec (0.36%), OCEC-Sec (0.71%), Dust-HEC (21.35%), Dust-Sec (0.72%), Cl-EC-NO3(1.22%), Na-Cl-NO3(3.20%), HM-Sec (2.58%), and PAH-Sec (0.90%). The obtained particle classes can be attributed to different sources of aerosol particles and different transmission and reaction processes. According to comprehensive analysis, the collected particle contribution sources were found to mainly include motor vehicle emission sources, biomass combustion sources, process sources, dust sources, and secondary processes. Among them, K-EC, EC, HEC, and Dust-HEC particles were mainly from direct emissions of primary sources. K-Sec, OC-Amine-Sec, OC-Sec, OCEC-Sec, Na-Cl-NO3, and PAH-Sec particles mainly undergo different degrees of aging or mixed with secondary components.
© 2020, Science Press. All right reserved. Number of references:62 Main heading:Particles (particulate matter) Controlled terms:Aerosols - Combustion - Dust - Mass spectrometers - Mass spectrometry - Particle size - Particle size analysis - Polycyclic aromatic hydrocarbons Uncontrolled terms:Aerosol mass spectrometers - Atmospheric environment - Beijing-tianjin-hebei regions - Chemical compositions - Comprehensive analysis - Fine particulate matter - Motor vehicle emissions - Particulate matter pollution Classification code:451.1 Air Pollution Sources - 801 Chemistry - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 1.20e+01%, Percentage 1.22e+00%, Percentage 1.38e+00%, Percentage 1.49e+00%, Percentage 1.60e-01%, Percentage 1.80e-01%, Percentage 2.00e-01%, Percentage 2.14e+01%, Percentage 2.58e+00%, Percentage 2.98e+00%, Percentage 3.20e+00%, Percentage 3.46e+00%, Percentage 3.58e+00%, Percentage 3.60e-01%, Percentage 3.93e+00%, Percentage 3.96e+01%, Percentage 7.10e-01%, Percentage 7.20e-01%, Percentage 9.00e-01% DOI:10.13227/j.hjkx.201907203 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796236 Title:Effect of Pyrolytic Temperature and Time on Characteristics of Typha angustifolia Derived Biochar and Preliminary Assessment of the Ecological Risk Title of translation:热解温度和时间对香蒲生物炭性质的影响及生态风险评估 Authors:Cai, Zhao-Hui (1, 2); Chu, Chen-Jing (1, 2); Zheng, Hao (1, 2); Luo, Xian-Xiang (1, 2); Li, Feng-Min (1, 2) Author affiliation:(1) Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao; 266100, China; (2) Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266237, China Corresponding author:Zheng, Hao(zhenghao2013@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2963-2971 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A batch of biochar was produced from pyrolysis of Typha angustifolia (TBCs) at 200-500℃ for 2 h and 6 h to investigate the effects of pyrolytic temperature and heating retention time on the physico-chemical properties. Moreover, Escherichia coli (E. coli) HB101 and the seeds of Helianthus annuus were used to preliminarily test the ecological risk of the TBCs. Results showed that the heating retention time (i.e., 2 and 6 h) had no significant effect on the properties of TBCs, while pyrolytic temperature significantly affected TBCs' characteristics. As the pyrolysis temperature increased from 200 to 500℃, the mass yield and contents of hydrogen (H) and oxygen (O) decreased, while the contents of carbon (C) and ash increased. The pH and surface pores also increased with increasing pyrolytic temperature, whereas the O-containing functional group (e.g., -COOH and -OH) decreased. These results indicated the increased carbonization and aromatization of the TBCs. For the inherent nutrients of TBCs, the total phosphorus (TP) and available potassium (K) contents significantly increased as temperature increased. The main components of dissolved organic matter (DOM) of TBCs were humic acid-like and fulvic acid-like organic compounds. As the pyrolysis temperature increased, the content of humic acid-like organic compounds decreased, while the content of fulvic acid-like organic compounds increased. All the TBCs had no significant effect on the growth of E. coli HB101 and the seed germination of Helianthus annuus, indicating the little ecological risk of TBCs under the experimental conditions. These findings provide an alternative way for resource utilization of waste wetland biomass and provide important theoretical data for screening biochar in soil reclamation.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Ecology Controlled terms:Carbonization - Escherichia coli - Organic acids - Pyrolysis - Risk assessment - Seed - Soil testing Uncontrolled terms:Available potassiums - Dissolved organic matters - Escherichia coli (E. coli) - Experimental conditions - Preliminary assessment - Pyrolysis temperature - Pyrolytic temperature - Resource utilizations Classification code:454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804.1 Organic Compounds - 821.4 Agricultural Products - 914.1 Accidents and Accident Prevention Numerical data indexing:Time 2.16e+04s, Time 7.20e+03s DOI:10.13227/j.hjkx.201909072 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796251 Title:Mechanisms of Fe-cyclam/H2O2 System Catalyzing the Degradation of Rhodamine B Title of translation:Fe-cyclam/H2O2体系催化降解罗丹明B机制 Authors:Yu, Yu-Qing (1); Chen, Xiang-Yu (1); Cai, Quan-Hua (1); Huang, Xin-Jue (1); Chen, Man (1) Author affiliation:(1) College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou; 350002, China Corresponding author:Chen, Man(chenman@fafu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2746-2753 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fenton reaction is a traditional method for the treatment of dye-containing wastewater. However, this process should be performed in a narrow pH range and requires large amounts of ferrous salt input, limiting its application. In this work, a robust iron complex bearing a cross-bridge cyclam ligand (Fe-cyclam) was successfully prepared. This complex could effectively activate H2O2 to degrade rhodamine B at a pH range of 2-7. The Fe-cyclam/H2O2 system was more effective in the degradation of rhodamine B than the Fenton reaction, when the input [Fe] was lower than 50 μmol•L^-1. Moreover, in addition to rhodamine B, the Fe-cyclam/H2O2 system was also capable of degrading dyes such as acid red 88, acid orange II, reactive red 24, and neutral red. This system was more efficient in the degradation of azo dyes than that of triphenylmethane dyes. The removal of rhodamine B remained higher than 90% in three cycle experiments, indicating the excellent stability of Fe-cyclam. The quenching experiments proved that the degradation of rhodamine B by Fe-cyclam/H2O2 was a free-radical-control process. Meanwhile, the electron paramagnetic resonance captured the signals of high valent Fe^V-oxo species, indicating that Fe^V-oxo possibly mediated the degradation of rhodamine B in the Fe-cyclam/H2O2 system. This work proves the potential application of Fe-cyclam/H2O2 in the degradation of dyes in a practical environment.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Rhodamine B Controlled terms:Azo dyes - Free radicals - Iron compounds - Oxidation - Paramagnetic resonance - pH - Vat dyes - Wastewater treatment Uncontrolled terms:Acid Orange II - Control process - Fenton reactions - Ferrous salts - Iron complex - ITS applications - Large amounts - Triphenylmethane dyes Classification code:452.4 Industrial Wastes Treatment and Disposal - 701.2 Magnetism: Basic Concepts and Phenomena - 801.1 Chemistry, General - 802.2 Chemical Reactions - 803 Chemical Agents and Basic Industrial Chemicals Numerical data indexing:Molar_Concentration 5.00e-02mol/m3 to 2.20e-02mol/m3, Percentage 9.00e+01% DOI:10.13227/j.hjkx.201911011 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796336 Title:Spatial Differentiation and Driving Analysis of Nitrogen in Rice Rotation Based on Regional DNDC: Case Study of Jinjiang River Watershed Title of translation:基于区域DNDC的稻田轮作氮素空间分异与驱动分析:以晋江流域为例 Authors:Wang, Ya-Nan (1); Shui, Wei (1); Qi, Xin-Hua (2); Fan, Shui-Sheng (3) Author affiliation:(1) College of Environment and Resources, Fuzhou University, Fuzhou; 350116, China; (2) College of Geographical Science, Fujian Normal University, Fuzhou; 350007, China; (3) Anxi College of Tea Science, Fujian Agriculture and Forest University, Anxi; 362400, China Corresponding author:Shui, Wei(shuiweiman@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2714-2726 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cycling dynamics of nitrogen in paddy rotation areas have a practical significance for ensuring food supply and realizing sustainable development of the regional ecology in the Min delta urban agglomeration. However, with rapid urbanization, the negative externalities of paddy rotation areas have been gradually increased because of unreasonable utilization behavior, and the environmental costs are increasing. Therefore, the spatial differentiation of nitrogen indicators and its driving factors were analyzed, which provides a macro-decision making basis for the implementation of farmland management measures. In this study, the paddy rotation area in Jinjiang River watershed was selected as the research object. The denitrification decomposition (DNDC) model was used to simulate the nitrogen cycle in the paddy rotation area. The hot spot analysis and geographical weight regression (GWR) model were used to analyze the spatial otherness characteristics and driving attribution of various nitrogen indices. The main results showed that: ① The DNDC model was validated by parameters, and the results showed preferably regional adaptability. ② Based on the comparison of different rotation patterns, the rice-vegetable rotation pattern not only established the maximum input of nitrogen fertilizer but also revealed the highest nitrogen absorption efficiency and the maximum values of nitrogen loss, followed by the rice-rice rotation pattern and rice-fallow rotation pattern. ③ In the spatial distribution of nitrogen indicators, except for the crop nitrogen absorption, the NH3 emission, N2O emission and nitrogen leaching showed a spatial clustering distribution, and the main trend line based on the standard deviation ellipse was mainly "Gande-Changkeng" township.④ According to the analysis of spatial influence factors for various nitrogen indices, soil attribute factors had the strongest effect; the SOCmax was the strongest influential factor for both NH3 and N2O emissions, and the spatial distribution was "west high, east low". The pHmin was the strongest influential factor in nitrogen leaching, and the spatial distribution was "north and south high, east and west low".
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Nitrogen fertilizers Controlled terms:Ammonia - Decision making - Food supply - Leaching - Rotation - Spatial distribution - Spatial variables measurement - Sustainable development - Watersheds Uncontrolled terms:Denitrification decompositions (DNDC) - Environmental costs - Management measures - Negative externalities - Nitrogen absorption - Rapid urbanizations - Spatial differentiation - Urban agglomerations Classification code:444.1 Surface Water - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 822.3 Food Products - 912.2 Management - 921 Mathematics - 931.1 Mechanics - 943.2 Mechanical Variables Measurements DOI:10.13227/j.hjkx.201910007 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278099 Title:Advanced Nitrogen Removal Characteristics of Low Carbon Source Municipal Wastewater Treatment via Partial-denitrification Coupled with ANAMMOX Title of translation:基于短程反硝化厌氧氨氧化的低碳源城市污水深度脱氮特性 Authors:Ma, Bin (1, 2); Xu, Xin-Xin (1); Gao, Mao-Hong (2); Wei, Yan (2); Peng, Yong-Zhen (1) Author affiliation:(1) National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing; 100124, China; (2) School of Ecology and Environment, Hainan University, Haikou; 570228, China Corresponding author:Peng, Yong-Zhen(pyz@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1377-1383 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Partial-denitrification coupled with ANAMMOX is a novel biological nitrogen removal technology, which is expected to significantly reduce the external carbon source dosage for advanced nitrogen removal from municipal wastewater. In this study, ANAMMOX sludge was inoculated to investigate advanced nitrogen removal performance and sludge characteristics in a partial-denitrification/ANAMMOX reactor. The results showed that inoculation of ANAMMOX sludge could quickly start the partial-denitrification/ANAMMOX reactor. The effluent total nitrogen concentrations were (4.82±1.84) mg•L^-1 with a chemical oxygen demand of 2.19±0.08. Sludge particles larger than 0.20 mm accounted for 86.16% in the reactor. This meant that granular sludge was formed, which was conducive to good retention of ANAMMOX bacteria in the reactor. The external carbon source dosage and the oxygen requirement for nitrification can be reduced by applying partial-denitrification coupled with ANAMMOX to advanced nitrogen removal from the effluent of secondary clarifier in municipal wastewater treatment plants.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Nitrogen removal Controlled terms:Activated sludge process - Carbon - Chemical oxygen demand - Clarification - Denitrification - Effluent treatment - Effluents - Granular materials - Oxygen - Sewage treatment plants - Wastewater treatment Uncontrolled terms:ANAMMOX - Biological nitrogen removal - Granular sludge - Municipal wastewater treatment - Municipal wastewater treatment plants - Municipal wastewaters - Removal characteristics - Removal from municipal wastewaters Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Percentage 8.62e+01%, Size 2.00e-04m DOI:10.13227/j.hjkx.201907135 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371286 Title:Dynamic Effects of Different Biochars on Soil Properties and Crop Yield of Acid Farmland Title of translation:不同生物炭对酸性农田土壤性质和作物产量的动态影响 Authors:Yang, Cai-Di (1); Zong, Yu-Tong (1); Lu, Sheng-Gao (1) Author affiliation:(1) College of Environmental and Resource Sciences, Zhejiang University, Hangzhou; 310058, China Corresponding author:Lu, Sheng-Gao(lusg@zju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1914-1920 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the dynamic effects of biochars produced from different biomass materials on farmland soil acidity, exchangeable cations, phosphorus nutrient, and crop yield, a field experiment was performed on acid paddy soil. Five types of biochars-rice straw biochar (RSB), maize straw biochar (MSB), wheat straw biochar (WSB), rice husk biochar (RHB), and bamboo charcoal (BCB)-were applied to farmland soil at mass fraction of 0.1%. No biochar addition was used as control treatment (CK). The soil physicochemical properties and crop yields were analyzed after harvesting rice, rapeseed, and corn crops. Results indicated that the addition of biochars could effectively increase soil pH and exchangeable cations and reduce exchangeable acid content, but the effects decreased with time. The biochars increased the content of exchangeable K⁺, Ca²⁺, and Mg²⁺ and decreased the exchangeable Na⁺ content in soils. The biochars increased the contents of organic matter (SOM), available phosphorus, total phosphorus, and inorganic phosphorus (Al-P and Fe-P). Compared with the control treatment, biochars significantly (P<0.05) increased the yields of rice, oil seed, and maize crops. Rice husk biochar (RHB) had the best effect in improving acid soil physicochemical properties and increasing crop yield.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Soil surveys Controlled terms:Acidification - Aluminum compounds - Charcoal - Crops - Farms - Iron compounds - Nutrients - Oilseeds - Phosphorus - Phosphorus compounds - Physicochemical properties - Positive ions - Soils Uncontrolled terms:Available phosphorus - Bio chars - Biomass materials - Control treatments - Crop yield - Exchangeable cation - Inorganic phosphorus - Soil physico-chemical properties Classification code:483.1 Soils and Soil Mechanics - 524 Solid Fuels - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4 Agricultural Products - 822.2 Food Processing Operations Numerical data indexing:Percentage 1.00e-01% DOI:10.13227/j.hjkx.201910102 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658198 Title:Stability of Ferrihydrite and Goethite Nanoparticles Under Different Environmental Conditions Title of translation:不同环境条件下水铁矿和针铁矿纳米颗粒稳定性 Authors:Wang, Zhi-Qiao (1); Ma, Jie (1); Chen, Ya-Li (1); Weng, Li-Ping (1); Gu, Ya-Tao (2); Li, Yong-Tao (1, 3) Author affiliation:(1) Key Laboratory for Environmental Factors Control of Agro-Product Quality Safety, Agro-Environmental Protection Institute of Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (2) SGS-CSTC Standards Technical Services (Tianjin) Co., Ltd., Tianjin; 300457, China; (3) College of Natural Resources and Environment, South China Agricultural University, Guangzhou; 510642, China Corresponding author:Ma, Jie(majie@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2292-2300 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Agglomeration and dispersion of nanoparticles control many important environmental processes. In this study, the particle size and zeta potential of ferrihydrite nanoparticles (FHNPs) and goethite nanoparticles (GTNPs) under different pH, ion, and organic matter conditions were measured. These data were used to calculate the Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction energy between nanoparticles to further investigate the stability of two nanoparticles. The results showed that Na⁺ and Ca²⁺ promoted FHNPs and GTNPs agglomeration due to their ionic strength. The PO4^3- with low-concentration (2 mmol•L^-1), humic acid and fulvic acid (2 mg•L^-1 and 10 mg•L^-1) loaded on iron mineral nanoparticles changed their surface charge and further improved the stability of FHNPs and GTNPs at medium and high pH. Although the PO4^3- with high concentration (10 mmol•L^-1) also changed the electrical properties of iron mineral nanoparticles, it had little contribution to the GTNP stability due to its ionic strength. When the zeta potentials of FHNPs or GTNPs were close to 0, the primary barrier and secondary minima were nonexistent simultaneously. The two kinds of nanoparticles irreversibly agglomerated in primary minima. When the primary barrier and secondary minima coexisted, the proportion of reversible aggregation of FHNPs and GTNPs in secondary minima increased. The results provided support for further investigation of the environmental behavior of FHNPs and GTNPs, and iron mineral nanoparticle-facilitated transport of pollutants.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Nanoparticles Controlled terms:Agglomeration - Ionic strength - Minerals - Organic acids - Particle size - Stability - Zeta potential Uncontrolled terms:Derjaguin-Landau-Verwey-Overbeek interactions - Dispersion of nano particles - Environmental behavior - Environmental conditions - Environmental process - Facilitated transport - Goethite nanoparticles - Reversible aggregation Classification code:482.2 Minerals - 761 Nanotechnology - 801.3 Colloid Chemistry - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 933 Solid State Physics Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e-03kg/m3 to 2.20e-02kg/m3, Molar_Concentration 1.00e+01mol/m3 to 2.20e-02mol/m3, Molar_Concentration 2.00e+00mol/m3 to 2.20e-02mol/m3 DOI:10.13227/j.hjkx.201910218 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256484 Title:Characteristics and Formation Mechanism of Three Haze Pollution Processes in Chengdu in Winter Title of translation:成都市冬季3次灰霾污染过程特征及成因分析 Authors:Feng, Xiao-Qiong (1, 2); Chen, Jun-Hui (2); Yin, Han-Mei (1); Xu, Xue-Mei (1); Xiong, Wen-Peng (1); Mei, Lin-De (1); Qian, Jun (2); Liu, Zheng (2) Author affiliation:(1) Sichuan Province Environmental Protection Technology Engineering Co., Ltd., Chengdu; 610041, China; (2) Sichuan Academy of Environmental Sciences, Chengdu; 610041, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4382-4391 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the online monitoring data of gaseous pollutants and components in PM2.5 from Chengdu super observatory of atmospheric environment, the meteorological factors and component characteristics of three haze pollution process in Chengdu from 2019 to 2020 were analyzed. The CMB model was adopted to simulate the sources and variation trends of PM2.5 pollution during the study period, and the causes of each pollution process were analyzed. The results showed that all the three pollution processes occurred under adverse meteorological conditions, where the relative humidity and temperature continued to rise and the wind speed and boundary layer height continued to decrease. The average daily relative humidity was greater than 70%, average daily temperature was greater than 8℃, average daily wind speed was less than 0.8 m•s^-1, and average daily boundary layer height was less than 650 m. During the three events of pollution, the main components were NO3^-, OC, NH4⁺, and SO4^2-. Among them, the mass concentration and proportion of NO3^- increased by 1.47-2.09 and 0.22-0.35 times, respectively, during the pollution period as compared to those during the clean period. NO3^- was a key component of PM2.5 pollution during winter in Chengdu. During the three pollution processes, the mean values of SOR and NOR were 0.40 and 0.27, respectively, and the secondary transformation degree of SO2 and NOx was high. The conversion of SO2 to SO4^2- was mainly dominated by heterogeneous oxidation at night, and the conversion of NOx to NO3^- was dominated by heterogeneous hydrolysis. The characteristics of the three processes were slightly different. Process Ⅰ showed evident secondary nitrate-dominated characteristics. During the period of rising PM2.5 concentration in process Ⅱ, it was mainly affected by coal emissions, but during the periods of high PM2.5 concentration, it was mainly affected by NO3^-. Process Ⅲ was also a nitrate-dominated process, but emissions of fossil fuel combustion had increased during certain polluted periods. Secondary nitrate, secondary sulfate, motor vehicles, and coal combustion were the main pollution sources during the study period. The PM2.5 concentration was positively correlated with the contribution of secondary nitrate and negatively correlated with the contribution of dust source.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Pollution Controlled terms:Atmospheric humidity - Boundary layer flow - Boundary layers - Coal combustion - Fog - Fossil fuels - Nitrates - Nitrogen oxides - Sulfur dioxide - Wind Uncontrolled terms:Atmospheric environment - Component characteristics - Fossil fuel combustion - Heterogeneous oxidation - Meteorological condition - Meteorological factors - Relative humidity and temperatures - Secondary transformation Classification code:443.1 Atmospheric Properties - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 631.1 Fluid Flow, General - 804.2 Inorganic Compounds Numerical data indexing:Percentage 7.00e+01%, Size 6.50e+02m, Velocity 8.00e-01m/s to 2.20e+01m/s DOI:10.13227/j.hjkx.202002130 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104981 Title:Observation of Aerosol Optical Properties and New Particle Formation in the Yangtze River Delta Title of translation:长三角地区气溶胶光学性质与新粒子生成观测 Authors:Du, Ying-Ying (1); Chen, Jun (1); Zhang, Jia-Luo (1); Gan, Gui-Cheng (1); Liu, Yu-Cun (1, 2, 3); Su, Ming-Xu (1); Lou, Sheng-Rong (2); Zhou, Min (2); Tao, Shi-Kang (2); Qiao, Li-Ping (2) Author affiliation:(1) Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai; 200093, China; (2) State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) Shanghai Thunder Environmental Technology Co., Ltd., Shanghai; 200235, China Corresponding author:Chen, Jun(j.chen@usst.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3932-3940 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In a recent field campaign focused on air quality study, aerosol optical properties, particle number concentration, and PM2.5 components were monitored in Changzhou, Jiangsu Province, from May 27 to June 27, 2019. An array of instruments were deployed that included scanning mobility particle size spectrometer (SMPS), aethalometer (AE33), cavity attenuation phase shift single albedo monitor (CAPS-ALB), monitor for aerosols and gases in ambient air (MARGA) and RT-4 organic carbon/elemental carbon (OC/EC) carbon analyzer to study the ① changes in chemical composition and optical parameters of the new particles generated during the campaign period. ② comparison of the aerosol extinction coefficient recorded by these instruments and measured value in the reconstruction of IMPROVE (interagency monitoring of protected visual environment) and the calculated coefficient using MIE theory model were carried out. During the entire campaign, two new particle generation events were observed and also found that the particle size continued to increase from 4 nm to 64 nm. It was monitored that in the initial stage of new particle generation, sulfate contributed greatly. The measured average aerosol extinction coefficient during the period of particle generation, using these instruments was 95.40 Mm^-1, while the average aerosol extinction reconstruction using the IMPROVE model was observed to be 140.20 Mm^-1. The theoretical calculations based on Mie theory model yielded an average extinction coefficient of 93.54 Mm^-1. It was found that the average aerosol extinction in Changzhou is lower than the average value of the urban aerosol extinction coefficient, which is measured to be 300 Mm^-1 in China, during this period. The deployment of multiple instruments in a single campaign is more desirable because the combination of all observations helped in better characterization of the physicochemical properties of ambient aerosols from various aspects, including particle size spectrum and chemical composition.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Particle size Controlled terms:Aerosols - Air quality - Light extinction - Optical properties - Organic carbon - Physicochemical properties - Sulfur compounds Uncontrolled terms:Aerosol extinction coefficient - Aerosol optical property - Chemical compositions - Extinction coefficients - Interagency monitoring of protected visual environments - New particle formation - Particle number concentration - Theoretical calculations Classification code:451.2 Air Pollution Control - 741.1 Light/Optics - 804.1 Organic Compounds Numerical data indexing:Size 4.00e-09m to 6.40e-08m DOI:10.13227/j.hjkx.201911271 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008884 Title:Comparison Analysis of the Effect of Emission Reduction Measures for Major Events and Heavy Air Pollution in the Capital Title of translation:首都重大活动与空气重污染应急减排措施效果对比分析 Authors:Zhong, Yi-Sheng (1); Zhou, Ying (1); Cheng, Shui-Yuan (1); Wang, Xiao-Qi (1); Shao, Xuan-Yi (1) Author affiliation:(1) Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China Corresponding author:Cheng, Shui-Yuan(chengsy@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3449-3457 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Taking the "9.3" military parade in 2015 and two red alerts of heavy air pollution in December of the same year as examples, the characteristics of meteorological factors and pollutant concentration variation were compared. Based on the estimation of pollutant emission reduction under different periods, the WRF-CAMx model was used to evaluate the effect of PM2.5 pollution improvement. The results showed that the daily average PM2.5 concentration (19.0 μg•m^-3) during the parade (from August 20 to September 4) decreased by 60.0% and 48.0%, respectively, in comparison to that before (August 15-19) and after (September 5-15) the parade. The daily average PM2.5 concentration (232.3 μg•m^-3) during the first red alert period was higher than that of the second red alert (216.6 μg•m^-3). The air quality before the second red alert was better than that before the first red alert. The proportion of emission reduction during the parade was generally larger than that during the red alert periods, which provided a controllable and favorable condition for the realization of the "Parade Blue". The PM2.5 concentration in Beijing decreased by 32.4%, 17.1%, and 22.0% under the control measures during the periods of the "9.3" parade, the first red alert, and second red alert, respectively. The higher proportion of PM2.5 concentration reduction could be attributed to the more intensive regional emission reduction and the favorable meteorological conditions. The intensity of the pollution reduction, the timing of the implementation of emergency control measures, and meteorological conditions were the most important factors that may have influenced the improvement of pollution.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Emission control Controlled terms:Air quality Uncontrolled terms:Comparison analysis - Favorable conditions - Meteorological condition - Meteorological factors - PM2.5 concentration - Pollutant concentration - Pollutant emission - Pollution reduction Classification code:451.2 Air Pollution Control Numerical data indexing:Percentage 1.71e+01%, Percentage 2.20e+01%, Percentage 3.24e+01%, Percentage 4.80e+01%, Percentage 6.00e+01% DOI:10.13227/j.hjkx.201910166 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990479 Title:Characteristics and Mechanism of Monothioarsenate Adsorption on Sand, Sediment, and Goethite Title of translation:一硫代砷酸盐在介质上的吸附特征及机制 Authors:Liao, Dan-Xue (1); Shan, Hui-Mei (1); Peng, San-Xi (2); Pan, Ao-Ran (1); Huang, Jian (1); Cheng, Hui (1); Zhao, Chao-Ran (1) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) College of Earth Sciences, Guilin University of Technology, Guilin; 541004, China Corresponding author:Shan, Hui-Mei(shanhuimei@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:284-292 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Batch experiments were conducted to investigate the adsorption characteristics and mechanism of monothioarsenate (MTA) (>99%) on sand, soil sediment, and goethite under different pH and solid-liquid ratio conditions. Results showed the following. ① When MTA ranged from 0.14 to 23.59, 0.19 to 41.27, and 0.27 to 32.02 mg•L^-1 in solutions, its maximum equilibrium adsorption capacity (Qm) in sand, soil sediment, and goethite was 21.54, 277.98, and 2 607.42 mg•kg^-1, respectively. After its adsorption reached equilibrium, a small amount of the MTA in the solutions transformed into arsenite and arsenate. ② As pH increased from 4 to 10, the equilibrium adsorption capacity (Qe) of MTA on sand decreased gradually, whereas Qe first decreased and then increased for soil sediment and goethite. As the solid-liquid ratio increased, the Qe of MTA in the three media gradually decreased. ③ X-ray powder diffraction (XRD), scanning electron microscope (SEM), and BET results further showed that the major factors controlling MTA adsorption on the three media included the low pore volume of sand, the high degree of crystallization of the soil sediment, and the large number of hydroxyl functional groups (-OH) on goethite.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Adsorption Controlled terms:Sand - Scanning electron microscopy - Sediments - Soils - X ray powder diffraction Uncontrolled terms:Adsorption characteristic - Batch experiments - Characteristics and mechanisms - Degree of crystallization - Equilibrium adsorption capacity - Major factors - Soil sediments - Solid-liquid ratio Classification code:483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations Numerical data indexing:Mass_Density 2.70e-04kg/m3 to 3.20e-02kg/m3 DOI:10.13227/j.hjkx.201905239 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008875 Title:Effects of Different Water Stratification on the Vertical Distribution of Nitrogen in Sediment Interstitial Waters: A Case Study of the Three Gorges Reservoir and Xiaowan Reservoir Title of translation:不同水体分层对沉积物间隙水氮素垂向分布影响: 以三峡水库和小湾水库为例 Authors:Liu, Jing-Si (1); Zhu, Xiao-Sheng (1); Hu, Zi-Long (1); Zhang, Si-Si (2); Yang, Zheng-Jian (1); Ji, Dao-Bin (1); Liu, De-Fu (1, 2) Author affiliation:(1) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Hubei Key Laboratory of Ecological Restoration of River-lake and Algal Utilization, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan; 430068, China Corresponding author:Yang, Zheng-Jian(656637841@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3601-3611 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To determine the reasons for the variation in the vertical distribution of nitrogen in sediment interstitial waters between different stratified reservoirs, the characteristics of overlying water-interstitial water in Xiangxi Bay, Yangtze River mainstream, and Xiaowan Reservoir were monitored. The vertical distribution of nitrogen in sediment interstitial waters in these different stratified waters were then analyzed, and the reasons for the variation in this distribution were assessed. The results showed: ① the ρ(TN) in the sediment interstitial waters of the Yangtze River mainstream and Xiangxi Bay gradually increased with depth, while that of Xiaowan Reservoir reached its maximum at 12 cm and the bottom layer presented a "C" distribution. The ρ(NH4⁺) in the sediment interstitial waters of the Yangtze River mainstream and Xiangxi Bay exhibited an increasing trend with depth, while that of Xiaowan Reservoir was slightly higher in the bottom layer than in the surface layer, although the change with depth was not significant. Overall, the ρ(NH4⁺) in the sediment interstitial waters of the Yangtze River mainstream and Xiangxi Bay was higher than that of Xiaowan Reservoir, and the concentration ranges were as follows: 0.512-8.289 mg•L^-1, 0.968-9.307 mg•L^-1, and 0.950-1.450 mg•L^-1. The vertical distribution of the ρ(NO3^-) in the sediment interstitial waters of all three waterbodies were opposite to that of ρ(NH4⁺). Moreover, the ρ(NO3^-) in the sediment interstitial waters of Xiangxi Bay and the Yangtze River mainstream was higher than that of Xiaowan Reservoir. The concentration ranges were as follows: 0.143-0.674 mg•L^-1, 0.107-0.647 mg•L^-1, and 0.050-0.051 mg•L^-1. ② There were also significant differences in the vertical distribution of physical and chemical indices in the three water bodies. There was no significant change in the vertical distribution of the water temperature in the Yangtze River mainstream and the N² value was <5×10^-5 s^-2; hence, the water was well mixed, and the vertical range of the dissolved oxygen content was 6.180-6.318 mg•L^-1. The water temperature in the upper and middle reaches of Xiangxi Bay decreased vertically, while the water temperature in the lower reach presented a ladder-like distribution and the N² values were all>5×10^-5 s^-2; thus, the water was in a stable stratified state and the dissolved oxygen content presented a "C" distribution. There was obvious stratification at the depths of 5-15 m and 54-70 m in Xiaowan Reservoir. The dissolved oxygen content decreased significantly at higher water temperature gradients, and there was no significant change along the water depth below 80 m. ③ The main reasons for the variation in the vertical distribution of nitrogen in the sediment interstitial waters of the three waterbodies were the differences in the overlying water hydrodynamics, dissolved oxygen distribution, and sediment environment. The ρ(NH4⁺) and ρ(NO3^-) were higher in Xiangxi Bay, which may have increased the denitrification rate and subsequently have helped to remove nitrogen and reduce the nitrogen load in these waters.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Reservoirs (water) Controlled terms:Biochemical oxygen demand - Denitrification - Dissolution - Dissolved oxygen - Nitrogen - Rivers - Sediments - Temperature Uncontrolled terms:Concentration ranges - Denitrification rate - Dissolved oxygen contents - Oxygen distribution - Stratified reservoirs - Three gorges reservoir - Vertical distributions - Water temperatures Classification code:441.2 Reservoirs - 483 Soil Mechanics and Foundations - 641.1 Thermodynamics - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.07e-04kg/m3 to 6.47e-04kg/m3, Mass_Density 1.43e-04kg/m3 to 6.74e-04kg/m3, Mass_Density 5.00e-05kg/m3 to 5.10e-05kg/m3, Mass_Density 5.12e-04kg/m3 to 8.29e-03kg/m3, Mass_Density 6.18e-03kg/m3 to 6.32e-03kg/m3, Mass_Density 9.50e-04kg/m3 to 1.45e-03kg/m3, Mass_Density 9.68e-04kg/m3 to 9.31e-03kg/m3, Size 1.20e-01m, Size 5.00e+00m to 1.50e+01m, Size 5.40e+01m to 7.00e+01m, Size 8.00e+01m DOI:10.13227/j.hjkx.201912135 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861846 Title:Pollution Characteristics of Water-soluble Inorganic Ions in Chengdu in Summer and Winter Title of translation:成都夏冬季PM2.5中水溶性无机离子污染特征 Authors:Feng, Yan-Peng (1); Zhang, Jun-Ke (1); Huang, Xiao-Juan (2); Liu, Qin (1); Zhang, Wei (3); Zhang, Jian-Qiang (1) Author affiliation:(1) Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu; 611756, China; (2) Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu; 610225, China; (3) Sichuan Environmental Monitoring Center, Chengdu; 610074, China Corresponding author:Zhang, Jun-Ke(zhangjunke@home.swjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3012-3020 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The water-soluble inorganic ions (WSIIs) in PM2.5 and gaseous precursors of Chengdu were continuously observed by a gas and aerosol collector combined with ion chromatography (GAC-IC) in the summer and winter of 2017, and both their pollution characteristics and a typical pollution process in winter were analyzed. It was found that the concentration of PM2.5 in winter (100.2 μg•m^-3) was significantly higher than that in summer (34.0 μg•m^-3). WSIIs were important components of PM2.5 and their total contributions to PM2.5 were 52.9% and 53.3% in summer and winter, respectively. Secondary ions (SNA) accounted for 73.2% and 87.6% of WSIIs in summer and winter, respectively. SO4^2- and NO3^- dominated the SNA in summer and winter, and the contributions to SNA were 37.7% and 59.7%, respectively. The NO3^-/SO4^2- ratio (2.7) in winter was significantly higher than that in summer (0.8), reflecting the important contribution of mobile sources (especially motor vehicles) to PM2.5 in this season. The diurnal variation of SNA in the two seasons was obviously different due to the differences in sources and meteorological conditions. In winter, with the aggravation of pollution, the concentrations of WSIIs and gaseous precursors increased significantly, and NO3^- was the key component in causing heavy pollution. Backward trajectory analysis revealed that the air masses in the two seasons in Chengdu differed significantly from each other. The WSIIs in summer and winter were dominated by SO4^2- and NO3^-, respectively. The short-distance and low-altitude transmission from the east and south of Chengdu contributed significantly to PM2.5 pollution in Chengdu.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Water pollution Controlled terms:Gas chromatography - Ion chromatography - Ions Uncontrolled terms:Aerosol collectors - Backward trajectory analysis - Diurnal variation - Gaseous precursors - Meteorological condition - Pm2.5 pollutions - Pollution process - Water soluble inorganic ions Classification code:453 Water Pollution - 801 Chemistry - 802.3 Chemical Operations Numerical data indexing:Percentage 3.77e+01%, Percentage 5.29e+01%, Percentage 5.33e+01%, Percentage 5.97e+01%, Percentage 7.32e+01%, Percentage 8.76e+01% DOI:10.13227/j.hjkx.202001061 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106031 Title:Seasonal Pollution Characteristics and Analysis of the Sources of Atmospheric VOCs in Chengdu Urban Area Title of translation:成都市城区大气VOCs季节污染特征及来源解析 Authors:Wang, Cheng-Hui (1); Chen, Jun-Hui (1); Han, Li (1); Xu, Chen-Xi (1); Wang, Bo (1); Li, Ying-Jie (1); Liu, Zheng (1); Qian, Jun (1) Author affiliation:(1) Sichuan Academy of Environmental Sciences, Chengdu; 610041, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3951-3960 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the seasonal variations in the concentrations of atmospheric volatile organic compounds (VOCs) in the urban area of Chengdu, VOC species were monitored from December 2018 to November 2019, and the concentrations, chemical composition, chemical reactivity, and sources of VOCs were analyzed. Average volume fraction of VOCs in spring, summer, autumn, and winter are 32.29×10^-9, 36.25×10^-9, 40.92×10^-9, and 49.48×10^-9, respectively. The concentrations in winter are significantly higher than the winter concentrations measured in other areas. There is no significant difference between VOC concentrations in spring and summer, but component concentrations vary from season to season. In winter, alkanes account for the largest proportion of total VOCs owing to vehicle emissions. The proportion of oxygen (nitrogen)-containing volatile organic compounds in summer and autumn is much higher than that in spring and winter. Volatile emissions from primary sources and secondary conversions have a great contribution. The average concentration of key components of VOCs in different seasons did not change significantly. C2-C4 alkanes, ethylene, acetylene, and dichloromethane concentrations may be significantly affected by vehicle exhaust, oil and gas volatilization, solvent use, and LPG fuel use. •OH consumption rate and OFP calculations show that key active species are mainly m/p-xylene, ethylene, propylene, 1-hexene, toluene, isopentane, and n-butane. Therefore, these species should be given priority in emissions control measures. Since the temperature in spring and summer is higher than in autumn and winter, and the UV rays are more intense, PMF analysis reveals the natural sources and the secondary emission sources as the major sources. The oil and gas volatilization source contributes to 9% of VOC concentrations in summer. The major VOC sources in autumn and winter are vehicle exhaust and combustion sources. Emissions from the combustion sources contribute to 25% and emissions from the catering sources in autumn and winter contribute to 9% of total VOC levels.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Liquefied petroleum gas Controlled terms:Atmospheric chemistry - Chemical analysis - Combustion - Dichloromethane - Ethylene - Paraffins - Secondary emission - Springs (components) - Vehicles - Volatile organic compounds Uncontrolled terms:Average concentration - Chemical compositions - Combustion sources - Component concentration - Consumption rates - Emissions control - Seasonal variation - Volatile emissions Classification code:443.1 Atmospheric Properties - 523 Liquid Fuels - 601.2 Machine Components - 804.1 Organic Compounds Numerical data indexing:Percentage 2.50e+01%, Percentage 9.00e+00% DOI:10.13227/j.hjkx.202002153 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517662 Title:Effects of Modified Biowaste-based Hydrochar on Rice Yield and Nitrogen Uptake Title of translation:废弃物基水热炭改良对水稻产量及氮素吸收的影响 Authors:Hou, Peng-Fu (1, 2); Xue, Li-Hong (1, 2); Feng, Yan-Fang (1, 2); Yu, Shan (1); Yang, Lin-Zhang (1) Author affiliation:(1) Key Laboratory of Agro-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; (2) School of Environmental and Safety Engineering, Jiangsu University, Zhenjiang; 212001, China Corresponding author:Feng, Yan-Fang(jaasfengyanfang@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5648-5655 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Biochar application on farmlands is an efficient way to realize agricultural/forestry biowaste recycling in parallel with carbon sequestration. Recently, hydrochar produced by hydrothermal carbonization processes has attracted attention due to the advantages over conventional pyrolytic production (i.e., easier production process, higher carbon yield, reduced energy consumption, and lower flue gas emissions). To clarify the effects of hydrochar applied in farmlands on crop production, as well as to realize the recycling of agricultural/forestry biowaste resources, this study evaluated the effects of four types of modified-hydrochar addition on rice yield and nitrogen uptake in two typical soils and the possible influencing factors through soil-column experiments and material characterization. The results showed that sawdust hydrochar and/or straw hydrochar could increase rice yield and nitrogen uptake, as well as reduce N loss, in both treated soils after physical or biological modification, an effect that was independent of the application rate (5‰, 15‰; mass fraction). In comparison to the control, the rice yield and nitrogen uptake of hydrochar-addition treatments increased by 9.2%-20.7% and 7.7%-17.0% respectively. Sawdust hydrochar, with a wider C/N material, was conducive to improving nitrogen uptake in high fertility soils; meanwhile, the nitrogen utilization in low fertility soils was less affected by the type of hydrochar due to the limitations imposed by multiple factors. The results of material characterization showed that the surface of the hydrochar was rich in nutrients; the pore structure of hydrochar after washing or biological modification was greatly improved, the relative content of C was remarkably reduced, and the relative contents of N and O notably increased, which could affect nutrient fixation and supply. Thus, the improved pore structure and increased contents of N and O of modified hydrochars may be the key drivers for the increase in rice yield and nitrogen uptake with hydrochar addition. These results suggest that modified hydrochar is beneficial to realizing agricultural/forestry biowaste recycling and improving crop yield and nitrogen utilization, as well as reducing N loss from farmlands.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Nitrogen Controlled terms:Agricultural robots - Agricultural runoff - Carbon - Carbonization - Crops - Cultivation - Energy utilization - Farms - Gas emissions - Nutrients - Pore structure - Recycling - Soils Uncontrolled terms:Application rates - Biological modification - Carbon sequestration - Hydrothermal carbonization - Material characterizations - Nitrogen utilization - Production process - Soil-column experiment Classification code:452.3 Industrial Wastes - 483.1 Soils and Soil Mechanics - 525.3 Energy Utilization - 802.2 Chemical Reactions - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Percentage 7.70e+00% to 1.70e+01%, Percentage 9.20e+00% to 2.07e+01% DOI:10.13227/j.hjkx.202005335 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517654 Title:Characteristics of Phyllosphere and Rhizosphere Bacterial Communities in Bothriochloa ischaemum in Copper Tailings Title of translation:铜尾矿白羊草叶际和根际细菌群落特征 Authors:Jia, Tong (1); Yao, Yu-Shan (1); Wang, Rui-Hong (1) Author affiliation:(1) Shanxi Key Laboratory of Ecological Restoration on Loess Plateau, Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5628-5635 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The phyllosphere and rhizosphere of plants and their living environment jointly form a complex ecosystem. Rhizosphere microorganisms are also the main driving force of the circulation of soil materials, which can provide a basis for the growth and development of plants. Phyllosphere and rhizosphere microorganisms can also be used as ecological indicators, and play significant roles in the ecological stability and recovery of mining areas. In this study, we selected a dominant species, Bothriochloa ischaemum, as the research object. We studied the characteristics of phyllosphere and rhizosphere bacterial communities in B. ischaemum from copper tailings with high-throughput sequencing methods. We explored the key ecological factors affecting the structure and diversity of phyllosphere and rhizosphere bacterial communities in B. ischaemum. The results showed that there were significant differences in the bacterial community structures between the rhizosphere and phyllosphere. The dominant phyllosphere bacterial genera of B. ischaemum included Pseudomonas, Enterobacter, and Sphingomonas. The dominant rhizosphere bacterial genera were Acidibacter and Solrubrobacter. Moreover, the Shannon diversity, abundance-based coverage estimator (ACE), and Chao1 indices of rhizosphere bacterial communities were significantly higher than those of phyllosphere communities. The key ecological factors affecting the dominant phyllosphere and rhizosphere bacterial genera included soil water content, pH, soil arsenic and zinc, total nitrogen, and sulfur of B. ischaemum, as well as plant cadmium and chromium. Furthermore, the Shannon diversity indices of rhizosphere bacterial communities were negatively correlated with root copper contents, and Simpson indices were positively correlated with root total nitrogen. There was a significant positive correlation between the ACE index and leaf total sculpture. These results provide a scientific basis for the exploration and utilization of phyllosphere and rhizosphere bacterial resources, and could improve the efficiency of ecological restoration in copper tailings.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Bacteria Controlled terms:Copper - Ecosystems - Nitrogen - Soil moisture Uncontrolled terms:Bacterial community structure - Ecological indicators - Ecological restoration - Ecological stability - Growth and development - High-throughput sequencing - Positive correlations - Rhizosphere microorganisms Classification code:454.3 Ecology and Ecosystems - 483.1 Soils and Soil Mechanics - 544.1 Copper - 804 Chemical Products Generally DOI:10.13227/j.hjkx.202005006 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517731 Title:Characterization of Metal Pollution of Regional Atmospheric PM2.5 and Its Sources Based on the PMF Model Title of translation:基于PMF模型的PM2.5中金属元素污染及来源的区域特征分析 Authors:Deng, Lin-Li (1); Zhang, Kai-Shan (1); Yin, Zi-Yuan (1); Li, Xin-Yue (1); Wu, Wen-Qi (1); Xiang, Xin-Peng (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:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5276-5287 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As important components of PM2.5, metal elements are extremely harmful to people and also have source specificity. Understanding the characteristics of PM2.5 metal pollution in the two different types of cities can help adjust the layout of regional industrial structure and improve the environment. PM2.5 samples during haze/non-haze periods were collected in Chengdu City and Renshou County. Inductively coupled plasma optical emission spectrometry (ICP-OES) was used to determine the mass concentrations of eighteen metal elements in collected PM2.5 samples. The positive matrix factorization (PMF) model was used for source apportionment analysis for metal elements in PM2.5. The analysis showed that the ratio of trace elements from fugitive dust, motor vehicle emissions, and coal burning to the total elements is greater in Chengdu City than that in Renshou County. The proportion of trace elements from biomass combustion, industrial, and fuel sources in Renshou County is higher than that in Chengdu City. In addition, concentrations of Cd, As, and Cr in both areas exceeded the standards, indicating the occurrences of heavy metal pollution. During the haze period, the total concentrations of compositional metal elements in PM2.5 increased, although the rate was much lower than that for PM2.5. The ratios of elements between haze and non-haze periods ranged from 0.7 (Al) to 2.8 (Ba) in Chengdu City, and from 0.8 (Al) to 3.1 (Mn) in Renshou County. Among all metal elements, the increase rate for trace elements from coal burning and industrial activities was relatively large but small for those from fugitive dust, with the growth in trace elements from motor vehicles being modest. The results of this study indicated that the characteristics of pollution and source of metal elements in PM2.5 varied by economic scale, development mode, and industrial layout. In large cities such as Chengdu City, where economic development is mainly focused on tertiary industry, air pollution is mainly caused by transportation and urban construction, while in suburban area such as Renshou County, where secondary or heavy industry are the focus for economic development, the pollution is mainly affected by energy consumption and industrial production.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Trace elements Controlled terms:Air quality - Coal combustion - Coal dust - Economic and social effects - Energy utilization - Factorization - Heavy metals - Inductively coupled plasma - Industrial economics - Optical emission spectroscopy - Urban transportation Uncontrolled terms:Characteristics of pollution - Heavy metal pollution - Inductively coupled plasma-optical emission spectrometry - Industrial activities - Industrial production - Industrial structures - Motor vehicle emissions - Positive matrix factorization models Classification code:432 Highway Transportation - 433 Railroad Transportation - 451.2 Air Pollution Control - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 525.3 Energy Utilization - 531 Metallurgy and Metallography - 911.2 Industrial Economics - 921 Mathematics - 932.3 Plasma Physics - 941.4 Optical Variables Measurements - 971 Social Sciences DOI:10.13227/j.hjkx.202004275 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990442 Title:Stoichiometric Characteristics of Purple Sloping Cropland Under Long-term Fertilization and Cultivation Title of translation:长期施肥和耕作下紫色土坡耕地土壤C, N, P和K化学计量特征 Authors:Du, Ying-Ni (1); Li, Tian-Yang (1); He, Bing-Hui (1); He, Xiao-Rong (2); Fu, Shi (1) Author affiliation:(1) Key Laboratory of Eco-environment in the Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Bishan Eco-environment Monitoring Station of Soil and Water Conservation, Chongqing; 402760, China Corresponding author:He, Bing-Hui(hebinghui@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:394-402 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Clarification of the effects of long-term fertilization and cultivation on soil organic carbon (C), nitrogen (N), phosphorus (P), and potassium (K) contents and their stoichiometric ratios can contribute to existing research on the C and nutrient biogeochemical cycles and their interacting mechanisms. Such information is also of great significance to fertilization management and for the control of non-point pollution. Fifteen plots (8 m long, 4 m wide) were set up on a representative purple hillslope (15°). Five treatments (three replications) were used on the plots: i) no fertilizer with downslope cultivation (CK), ii) combined application of manure and fertilizer with downslope cultivation (T1), iii) chemical fertilizers with downslope cultivation (T2), iv) chemical fertilizer with increasing fertilization with downslope cultivation (T3), and v) chemical fertilizer with contour cultivation (T4). The C, N, P and K contents and their ratios in the five treatments corresponding to 0-10 cm and 10-20 cm soil depths were compared. The results showed that C, N and P contents for the different treatments were differed significant and could be ranked: T1>T3>T4>T2>CK (P<0.05). K content was not significantly different among the four fertilizations (P>0.05) but was significantly higher than the CK treatment (P<0.05), and could be ranked: T4>T3>T2>T1>CK. The C:N ratios in the five treatments were significantly different (P<0.05) at a soil depth of 10-20 cm (T4>T3>T1>CK>T2). The C:P ratios in the five treatments were significantly different (P<0.05) at a soil depth of 0-10 cm (T1>T3>CK>T4>T2). The C:K, N:P, N:K, and P:K ratios for the five treatments at both of the soil depths showed significant differences (P<0.05), and the C:K, N:K, and P:K were ranked as T1>T3>T4>T2>CK, whereas the N:P ratio was ranked as T1>CK>T4>T3>T2. The C, N, P, and K contents and their stoichiometric ratios decreased with increasing soil depth. Soil C, N and P in the study site showed moderate variations based on their coefficient of variation (CV): 37.50%, 38.91%, and 25.35%, respectively. Soil K on the other hand showed a weak variation (CV 5.03%). Soil C:N and C:P also showed a weak variation with a CV of 7.52% and 14.38%, respectively. Soil C:K, N:P, N:K, and P:K showed moderate variations, with a CV of 35.62%, 17.01%, 37.24% and 44.78%, respectively. There were significant positive interrelations among soil C, N, P, and K contents and their stoichiometric ratios (P<0.05). The average N:P ratio was 2.09, which was much lower than the average value for various soil types in China. Our results indicate that soil N is the key limiting nutrient in purple hillslope land, and that the combination of organic and inorganic fertilizers can effectively alleviate the N deficiency in the study area.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Fertilizers Controlled terms:Biogeochemistry - Nutrients - Organic carbon - Pollution control - Soils Uncontrolled terms:Biogeochemical cycle - Chemical fertilizers - Coefficient of variation - Different treatments - Inorganic fertilizers - Long-term fertilization - Soil organic carbon - Stoichiometric ratio Classification code:481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.44e+01%, Percentage 1.70e+01%, Percentage 2.54e+01%, Percentage 3.56e+01%, Percentage 3.72e+01%, Percentage 3.75e+01%, Percentage 3.89e+01%, Percentage 4.48e+01%, Percentage 5.03e+00%, Percentage 7.52e+00%, Size 0.00e+00m to 1.00e-01m, Size 1.00e-01m to 2.00e-01m, Size 4.00e+00m, Size 8.00e+00m DOI:10.13227/j.hjkx.201907098 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256474 Title:Variational Trend and Characteristics of Air Pollution in Baoding City Title of translation:保定市大气污染变化趋势及特征 Authors:Gou, Yin-Yin (1, 2); Zhang, Kai (2); Li, Jin-Juan (1); Lü, Wen-Li (2); Zhu, Shuang (2); Li, Jie (1, 2); He, Shan-Shan (3); Zheng, Yue (2); Zhi, Min-Kang (2) Author affiliation:(1) College of Resources and Environmental Engineering, Guizhou University, Guiyang; 550025, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Baoding Environmental Monitoring Center of Hebei Province, Baoding; 071000, China Corresponding author:Zhang, Kai(zhangkai@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4413-4425 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the trends and characteristics of air pollution in Baoding in recent years, an analysis of air quality and air pollutant concentrations in Baoding from 2013 to 2018 was carried out. The results showed that: ① from 2013 to 2018, the comprehensive index of Baoding dropped from 11.6 to 6.6, the days of severe pollution decreased from 114 days to 27 days, and cumulative concentration of pollutants during severe pollution decreased from 57.34% to 20.59%. This indicated that the air quality of Baoding city has improved year on year from 2013 to 2018. Not only has the number of heavy pollution days and the annual average concentration of pollutants decreased, but also the proportion of cumulative concentrations of pollutants during heavy pollution has decreased. the difference between the average concentration level of Baoding city and "2+26" Cities is getting smaller and smaller. ② Summer ρ(O3-8h) increased year on year. In 2017 and 2018, the heavy pollution days caused by O3 accounted for 17.0% and 14.8% of the heavy pollution days of the year, respectively, and the ozone pollution gradually became prominent; the characteristic value of NO2 in autumn was higher than that of SO2, CO, PM2.5, and PM10, indicating that the type of pollution in autumn was more motorized. The sources of pollution in winter changed from the partial combustion of coal in 2013-2014 to a mixed influence of partial combustion of coal and incomplete combustion in 2015-2018. ③ In 2016, 2017, and 2018, a high cumulative concentrations of PM2.5 during the high pollution season that accounted for 5.56%, 6.21%, and 2.58% declined as compared to that during the same period in 2015; this was the largest decline among the six pollutants; PM10 followed; The decreases of SO2 and NO2 were small, indicating that the emergency measures were better in cutting peaks of particulate matter than the gaseous pollutants during heavy pollution in Baoding. In a heavy pollution event during the high pollution season in 2018, partial-burning coal-type pollution increased as compared to that during the high pollution season in 2017, indicating that the coal combustion was still one of the pollution sources that Baoding city needed to control. In summary, Baoding should strengthen the management and control of motor vehicles in autumn, and gradually change from the original coal control measures to a combination of coal control and diesel control in winter; in the future, the focus of air pollution prevention and control should be strengthened toward O3 pollution.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Air pollution control Controlled terms:Air quality - Coal - Coal combustion - Fog - Nitrogen oxides - Quality control - Sulfur dioxide Uncontrolled terms:Air pollutant concentrations - Air pollution prevention - Annual average concentration - Average concentration - Characteristic value - Comprehensive indices - Incomplete combustion - Management and controls Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 524 Solid Fuels - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control Numerical data indexing:Age 3.12e-01yr to 7.40e-02yr, Percentage 1.48e+01%, Percentage 1.70e+01%, Percentage 2.58e+00%, Percentage 5.56e+00%, Percentage 5.73e+01% to 2.06e+01%, Percentage 6.21e+00% DOI:10.13227/j.hjkx.201912193 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952723 Title:Impacts of Nitrogen Application on Ammonia Volatilization During Maize Season in Northern China Title of translation:氮肥使用对北方夏玉米季氨挥发的影响 Authors:Zhang, Wei (1); Ni, Bang (1); Xu, Xiu-Chun (1); Yang, Xuan (1); Meng, Fan-Qiao (1) Author affiliation:(1) Beijing Key Laboratory of Prevention, Control and Restoration of Farmland and Soil Pollution, College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China Corresponding author:Meng, Fan-Qiao(mengfq@cau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5176-5184 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ammonia volatilization is one of the major paths of nitrogen (N) loss and may exert a substantial impact on air quality. This study aims to explore the effects of nitrogen (N) fertilizer types, fertilization rate, and application timing and gas collection method on NH3 volatilization during the maize season in Northern China. This study collected the publications on the NH3 volatilization from maize farming which were conducted in Northern China from 1980 to 2018, and undertook a systematic analysis. The study found that with the increase of N rate, the total and net NH3 volatilization at the basal and topdressing fertilization stages increased at exponential and power function, respectively. When the ratio of basal/topdressing N rate was 1/1, the total and net NH3 volatilization during the topdressing stage (58.4% of the whole season emission) was significantly higher than that in the basal fertilization stage (41.6%) (P<0.05). The priming effect first showed a negative effect and then gradually turned into a positive effect with the increase of N rate. Due to the positive priming effect, the net NH3 volatilization, without considering the priming effect, was overestimated under the conventional N application (>297 kg•hm^-2). There is a significant difference between the NH3 volatilization measured by the venting method and the sponge absorption method, and the data from the venting method are more stable (P<0.01). Compared with conventional urea, slow-release urea may reduce NH3 volatilization by 20% to 50%. Control fertilizer N rate at the topdressing stage is more efficient in reducing the NH3 volatilization from maize production in Northern China, and the venting method is more suitable for the quantification of NH3volatilization than the sponge absorption method under a high rate of fertilizer N.
© 2020, Science Press. All right reserved. Number of references:50 Main heading:Ammonia Controlled terms:Air quality - Metabolism - Nitrogen fertilizers - Urea Uncontrolled terms:Ammonia volatilization - Application timing - Fertilization rates - Gas collections - Maize production - Power functions - Priming effects - Systematic analysis Classification code:451.2 Air Pollution Control - 804 Chemical Products Generally Numerical data indexing:Percentage 2.00e+01% to 5.00e+01%, Percentage 4.16e+01%, Percentage 5.84e+01% DOI:10.13227/j.hjkx.202002113 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953547 Title:Hydrogeochemical Investigations of Groundwater in the Lingbei Area, Leizhou Peninsula Title of translation:雷州半岛岭北地区地下水水文地球化学特征 Authors:Zhang, Hong-Xin (1); Wu, Ya (1); Luo, Wei-Yu (2); Chen, Wen (1); Liu, Huai-Qing (1) Author affiliation:(1) Wuhan Center of China Geological Survey, Wuhan; 430205, China; (2) NO.4 Geological Party, Guangdong Geological Bureau, Zhanjiang; 524049, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4924-4935 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Groundwater is an important source of water supply in the Leizhou Peninsula. In August 2018, five surface water samples, 18 shallow pore water samples, 14 middle-deep pore water samples, and 27 pore fissure water samples were collected in the Lingbei area, the northern part of the Leizhou Peninsula. Major ion concentrations, as well as H, O isotope composition (of δ¹⁸O and δ²H) were analyzed. The results show that groundwater pH values, total hardness, concentrations of K⁺, TDS, Cl^-, and SO4^2- are low, while H2SiO3(aq) and NO3^- concentrations are relatively high. For pores and fissures water, hydrochemical types are mainly Mg-Ca-HCO3, Mg-Ca-HCO3-Cl, and Cl^- loadings are significantly increased along the flow path. Ca-Cl, Na-Ca-HCO3-Cl, and Na-Ca-Mg-HCO3-Cl types predominate in shallow pore water. For middle-deep pore water, the types are primarily Mg-Ca-HCO3, Na-Ca-Mg-HCO3, K-Na-HCO3-SO4, and concentrations of K⁺, Na⁺, Cl^-, and SO4^2- are modestly increased along the flow path. We find that the groundwater is of meteoric origin, groundwater Cl^- and Na⁺ originate from marine atmospheric precipitation, Mg⁺, Ca²⁺, and HCO3^- are mainly derived from silicate weathering, and NO3^- principally arises from chemical fertilizer. Shallow pore water and fissure pore water are affected by evaporation concentration, whereas cation exchange is important for middle-deep pore water. The milligram equivalent ratio of nitrate in groundwater reaches 28.3%. After taking into account the nitrate, 50.85% of the sampling water is NO3 type, and displays a pollution trend. Our results contribute to the sustainable utilization of groundwater in the study area and other similar areas.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Hydrochemistry Controlled terms:Calcium compounds - Chlorine compounds - Fertilizers - Groundwater - Magnesium compounds - Nitrates - River pollution - Silicates - Sodium compounds - Surface waters - Water supply - Weathering Uncontrolled terms:Atmospheric precipitation - Chemical fertilizers - Equivalent ratios - Hydrogeochemical investigation - Ion concentrations - Isotope compositions - Silicate weathering - Sustainable utilization Classification code:444.1 Surface Water - 444.2 Groundwater - 446.1 Water Supply Systems - 453 Water Pollution - 481.2 Geochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.83e+01%, Percentage 5.09e+01% DOI:10.13227/j.hjkx.202002187 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952727 Title:Distribution and Ecological Risk of Heavy Metals in the Soil of Redevelopment Industrial Sites Title of translation:再开发利用工业场地土壤重金属含量分布及生态风险 Authors:Shen, Cheng (1); Liu, Fu-Wen (2); Wu, Jian (1); Huang, Shen-Fa (1); Wang, Min (1); Huang, Bo-Tao (1) Author affiliation:(1) Shanghai Academy of Environmental Sciences, Shanghai; 200233, 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 Corresponding author:Wu, Jian(wuj@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5125-5132 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fifty typical redevelopment industrial sites in the Putuo, Baoshan, Minhang, and Jiangding districts of Shanghai were chosen to evaluate the ecological risk of heavy metals in the soil. The contents of heavy metal (Hg, Cd, Pb, Cr, and As) in 1847 soil samples, taken from vertical sections, were determined, and their risks were evaluated using the Nemero composite index and Hakanson potential ecological risk index. The average contents of Hg, Cd, Pb, Cr, and As in topsoil samples were 0.33, 0.37, 74.55, 69.23, and 9.05 mg•kg^-1, respectively. The contents of Hg, Cd, and Pb exceeded the soil background values of Shanghai, which were 2.75, 2.85, and 2.93 times the background values, respectively. The contents of five heavy metals in soil decreased gradually with increased depth. The contents of heavy metals in deep and saturated soils were close to, or below, the background values, indicating that the anthropic activity disturbance was mainly confined to the topsoil. The accumulation of Hg, Cd, and Pb was the most obvious in Putuo topsoil, with the average contents being 4.25, 4.85, and 3.09 times the background values, respectively. The average contents of Hg and Pb in Baoshan were 4.92 and 6.43 times the background values, respectively. The Nemero Composite Index of Baoshan and Putuo districts were 3.70 and 3.20, respectively, representing heavy pollution level at these sites. The Hakanson potential ecological risk indexes of the Putuo and Baoshang districts were 398.59 and 303.08, respectively, with considerable ecological risk levels. The content and ecological risk of heavy metals at the Minhang and Jiading sites were relatively low. In summary, the pollution of heavy metal in the redeveloped industrial sites is influenced by the operating time, industry type, and past management level of the enterprises. The heavy metal accumulation in the Putuo and Baoshan districts, whose industries developed earlier, were higher than those in the Minhang and Jiading districts. The pollution of heavy metal Hg, Cd, and Pb in soil should be a focus of future work.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Soil pollution Controlled terms:Bioaccumulation - Heavy metals - Soils Uncontrolled terms:Anthropic activity - Hakanson potential ecological risk indices - Heavy metal accumulation - Heavy metals in soil - Industrial sites - Management level - Pollution of heavy metals - Potential ecological risk Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography DOI:10.13227/j.hjkx.202003267 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953494 Title:Effects of Mesophilic Anaerobic Digestion and Thermophilic Anaerobic Digestion on the Risk and Stability of Heavy Metals in Sludge Title of translation:中温厌氧消化与高温厌氧消化对污泥重金属风险及稳定性的影响 Authors:Tian, Zhong-Ke (1); Wang, Fen (1); Yan, Zhao (1) Author affiliation:(1) School of Environmental Science and Engineering, Tianjin University, Tianjin; 300350, China Corresponding author:Wang, Fen(wangfen@tju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5106-5113 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Anaerobic digestion is widely used for sewage sludge stabilization. Different anaerobic digestion methods have different impacts on the speciation and stability of heavy metals in sludge. This study investigated the response of the speciation and stability of heavy metals in sludge to the treatment of mesophilic anaerobic digestion-mechanical dewatering and thermal hydrolysis pre-treatment-thermophilic anaerobic digestion. The results showed that the process of mesophilic anaerobic digestion increased the contents of Cd, Cr, Cu, Ni, and Zn in the sludge, increasing its contamination level and potential ecological risks. In contrast, the thermophilic anaerobic digestion process increased the contents of Cd, Cr, and Pb in the sludge, reducing the level of heavy metal contamination and potential ecological risks. It was found that the main contaminated metals were Cd and Zn in Plant N and Cd in Plant S. Cd has the highest risk factor and is the highest risk contributor to the potential ecological risk of all the types of sludge. The sum of reducible and the exchangeable fractions of Cd, Ni, Pb, and Zn reduced, and the residual fraction of Cd, Cr, Cu, and Ni decreased after mesophilic anaerobic digestion. This indicated that the process of mesophilic anaerobic digestion changed the proportion of potential toxicity and steady state of the heavy metals into direct toxicity. After thermophilic anaerobic digestion, the exchangeable proportion of Cd, Cr, Cu, Pb, and Zn decreased, and the steady state of Cd, Cr, Cu, Ni, Pb, and Zn decreased. After the thermophilic anaerobic digestion process, the proportions of bio-availability and mobility of heavy metals therefore decreased, and the proportions of steady state also reduced. The potential toxicity increased.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Anaerobic digestion Controlled terms:Heavy metals - Sewage sludge - Sludge digestion - Soil pollution - Toxicity Uncontrolled terms:Contamination levels - Exchangeable fraction - Heavy metal contamination - Mechanical dewatering - Mesophilic anaerobic digestion - Potential ecological risk - Sewage sludge stabilization - Thermophilic anaerobic digestion Classification code:452.2 Sewage Treatment - 461.7 Health Care - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography DOI:10.13227/j.hjkx.202003166 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953337 Title:Effect of Heavy Rainfall on Nitrogen and Phosphorus Concentrations in Rivers at River-net Plain Title of translation:强降雨对平原河网区入湖河道氮, 磷影响 Authors:Lian, Xin-Qiao (1, 2); Zhu, Guang-Wei (2); Yang, Wen-Bin (1); Zhu, Meng-Yuan (2); Xu, Hai (2) Author affiliation:(1) School of Ecology and Environment, Anhui Normal University, Wuhu; 241003, China; (2) Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Yang, Wen-Bin(ywb1968@mail.ahnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4970-4980 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To understand the quantitative effect of heavy rain on nitrogen and phosphorus pollution in river-net plain, daily observations of nutrient concentrations in two rivers, flowing into Lake Taihu, were conducted from 1st September, 2017 to 31st August, 2019. The daily rainfall was recorded by auto-recording meteorological stations located on the two rivers and the Taihu Laboratory for Lake Ecosystem Research. Intensive sampling in different sections of the two rivers during Super Typhoon Lekima was also conducted in August 2019. Using these datasets, the influence of heavy rainfall on various forms of nitrogen and phosphorus concentrations in the rivers, and its environmental effects, were analyzed. The results showed that 16 heavy rainfall events (19 d) were observed in two years, 50% of which occurred in the summer season. In addition, heavy rainfall accounted for as much as 41.33% of the total rainfall over the entire year. After the period of heavy rainfall, the concentrations of various forms of nitrogen and phosphorus increased, and the particulate P generally exhibited the fastest response, usually peaking on the day of heavy rainfall. In contrast, the peaks of N were delayed for 2-5 days with the occurrence of heavy rain. In general, the duration of the increase in the concentration of nutrients in the study river caused by heavy rainfall was short (usually 1-2 days), and sometimes was lower than the concentration before the rains. The Dapu River exhibited a slower response to heavy rains than the Yincun River because it has a larger and longer catchment area than the Dapu River. In addition, the effect of heavy rain on N and P concentrations was also strongly influenced by the land-use situation around the river basin. The increase of nitrogen in the reach, affected by agricultural non-point sources, was dominated by granular nitrogen, and the increase of nitrogen in the reach affected by urban non-point sources was dominated by dissolved nitrogen. The increase of phosphorus was dominated by granular phosphorus in the entire process. The conclusions of this study are as follows: In the plain river network area, the fluctuations of nitrogen and phosphorus concentrations in the river water body caused by heavy rainfall are small, and the response of various forms of nitrogen and phosphorus are significantly affected by the local environmental background. Therefore, the water quality generally exhibited limited variation. Due to the large proportion of water entering the lake during heavy rainfall events, a high level of the nutrient loading was also observed, and the occurrence of heavy rainfall was occasional. The short-term effect of heavy rainfall on the nitrogen and phosphorus loading entering the lake in the river channel in the plain river network area is therefore, also significant, and requires further investigation.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:River pollution Controlled terms:Agricultural robots - Catchments - Ecosystems - Eutrophication - Lakes - Land use - Landforms - Nitrogen - Nutrients - Phosphorus - Rain - Rivers - Water quality Uncontrolled terms:Dissolved nitrogen - Intensive sampling - Meteorological station - Nitrogen and phosphorus - Nutrient concentrations - Plain river networks - Quantitative effects - Short-term effects Classification code:403 Urban and Regional Planning and Development - 443.3 Precipitation - 445.2 Water Analysis - 453 Water Pollution - 454.3 Ecology and Ecosystems - 481.1 Geology - 804 Chemical Products Generally Numerical data indexing:Age 2.74e-03yr to 5.48e-03yr, Age 5.48e-03yr to 1.37e-02yr, Percentage 4.13e+01%, Percentage 5.00e+01% DOI:10.13227/j.hjkx.202003183 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861952 Title:Evaluation of the Reduction in PM2.5 Concentration During the National Traditional Games of Ethnic Minorities in Zhengzhou Title of translation:郑州市民运会期间大气PM2.5改善效果评估 Authors:Wang, Shen-Bo (1); Lou, Ya-Min (2); Xu, Yi-Fei (3); Yuan, Ming-Hao (3); Su, Fang-Cheng (1); Zhang, Rui-Qin (1) Author affiliation:(1) College of Chemistry, Research Institute of Environmental Science, Zhengzhou University, Zhengzhou; 450001, China; (2) Henan Environmental Protection Monitoring Center, Zhengzhou; 450046, China; (3) Zhengzhou Environmental Protection Monitoring Center Station, Zhengzhou; 450000, China Corresponding author:Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3004-3011 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To evaluate the effect of the implementation of emission reduction measures and the improvement in air quality during the National Traditional Games of Ethnic Minorities in Zhengzhou, a series of online instruments were used to continuously observe air pollutants and components of PM2.5 from August 5 to September 30, 2019. Three cases, including before emission reduction (August 5-24), during emission reduction (August 25 to September 18), and after emission reduction (September 19-30), were classified by the implementation of control measures. The results show that the growing concentration of PM2.5 after the cancellation of emission abatement measures (11.7 μg•m^-3) was greater than that during the emission reduction (2.3 μg•m^-3) compared to the PM2.5 concentration before emission reduction. This thus indicates that the control measures have a significant effect on reducing particulate matter. The main components of PM2.5 were organic matter, nitrate, ammonium, sulfate, and crustal elements. Compared to the proportion of components in PM2.5 before and during the control periods, organic matter and nitrate increased by 3.9% and 0.9%, respectively, while sulfate, ammonium, and crustal elements decreased by 1.1%, 1.9%, and 2.2%, respectively. The results of source appointment by positive matrix factorization show that secondary sulfate, secondary nitrate, secondary organic aerosols, vehicular emissions, industrial emissions, dust, and coal combustion are the main sources of PM2.5. Emission abatement measures reduced the contributions of primary sources such as dust, coal combustion, and industry by 8.3%, 8.2%, and 8.1%, respectively. In contrast, the contributions of secondary organic and nitrate aerosols increased during the control periods, which suggested that the control measures implemented in Zhengzhou had a weaker emission reduction effect on nitrogen oxide and volatile organic compounds than on primary sources of PM2.5.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Quality control Controlled terms:Aerosols - Air quality - Biogeochemistry - Coal combustion - Coal dust - Coal industry - Dust abatement - Emission control - Factorization - Nitrates - Nitrogen oxides - Sulfur compounds - Volatile organic compounds Uncontrolled terms:Emission abatement - On-line instruments - Particulate Matter - PM2.5 concentration - Positive Matrix Factorization - Secondary nitrates - Secondary organic aerosols - Vehicular emission Classification code:451.2 Air Pollution Control - 481.2 Geochemistry - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 913.3 Quality Assurance and Control - 921 Mathematics Numerical data indexing:Percentage 1.10e+00%, Percentage 1.90e+00%, Percentage 2.20e+00%, Percentage 3.90e+00%, Percentage 8.10e+00%, Percentage 8.20e+00%, Percentage 8.30e+00%, Percentage 9.00e-01% DOI:10.13227/j.hjkx.201911045 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990448 Title:PM2.5 Pollution Characteristics During Winter and Summer in the Hohhot-Baotou-Ordos Region, China Title of translation:呼包鄂地区冬季, 夏季 PM2.5污染特征 Authors:Li, Yi-Ming (1); Liu, Jia-Yuan (2); Shi, Guo-Liang (1); Huangfu, Yan-Qi (1); Zhang, Xin (3); Yang, Yi (3); 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; 300071, China; (2) Institute of Atmospheric Environmental Science, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) State Environmental Protection Key Laboratory of Eco-Industry, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Zhang, Xin(zhangxin@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:31-38 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the source apportionment by positive matrix factorization (PMF) model, we analyze the main sources and characteristics of aerosol fine particulate matter (PM2.5) during winter and summer in the Hohhot-Baotou-Ordos region, China. We found that organic (19.9%-44.6%) and crustal compositions (9.7%-46.2%) accounted for a large proportion of aerosol PM2.5 according to the results of mass closure. The results of source apportionment showed that the contribution of sources rank as: secondary inorganic aerosol (26.7%)>coal (26.1%)>motor vehicle (19.1%)>dust (18.1%) during winter, and as: secondary inorganic aerosol (26.7%)>dust (22.3%)>coal (16.6%)>vehicle exhaust (15.1%)>SOC (8.7%) during summer. Findings suggest that the contribution of sources with secondary inorganic aerosol were the largest sources both in winter and summer, and that the Hohhot-Baotou-Ordos region was also affected by coal during the winter and dust during the summer. Corresponding to the source apportionment, analysis of typical heavy pollution episodes in winter and summer showed that the pollution sources during the winter were mainly secondary inorganic aerosol and coal, whereas they were mainly secondary inorganic aerosol during the summer.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Air pollution Controlled terms:Aerosols - Coal - Coal dust - Factorization Uncontrolled terms:Crustal composition - Fine particulate matter (PM2.5) - Pm2.5 pollutions - Pollution episodes - Pollution sources - Positive matrix factorization models - Secondary inorganic aerosol - Source apportionment Classification code:451 Air Pollution - 524 Solid Fuels - 921 Mathematics Numerical data indexing:Percentage 1.51e+01%, Percentage 1.66e+01%, Percentage 1.81e+01%, Percentage 1.91e+01%, Percentage 1.99e+01% to 4.46e+01%, Percentage 2.23e+01%, Percentage 2.61e+01%, Percentage 2.67e+01%, Percentage 8.70e+00%, Percentage 9.70e+00% to 4.62e+01% DOI:10.13227/j.hjkx.201904207 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990437 Title:Effect of Different Passivating Agents on the Stabilization of Heavy Metals in Chicken Manure Compost and Its Maturity Evaluating Indexes Title of translation:不同钝化剂对鸡粪堆肥重金属钝化效果及其腐熟度指标的影响 Authors:Luan, Run-Yu (1, 2); Gao, Shan (1, 2); Xu, Ying-Ming (2); Ji, Yi-Ning (1, 2); Yan, Cui-Xia (2, 3); Sun, Yue-Bing (2) Author affiliation:(1) College of Resources and Environment, Northeast Agricultural University, Harbin; 150030, China; (2) Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Agro-Environmental Protection Institute, Tianjin; 300191, China; (3) College of Grassland and Environment Sciences, Xinjiang Agricultural University, Urumqi; 830052, China Corresponding author:Sun, Yue-Bing(sunyuebing@aepi.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:469-478 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We explore the effects of different passivating agents on livestock manure treatment by using chicken manure and straw as raw materials and thermophilic rapid fermentation. We investigate the effects of sepiolite (SE), calcium magnesium phosphate fertilizer (NP), biochar (BI), compounds of sepiolite plus calcium magnesium phosphate fertilizer (S+N), sepiolite plus biochar (S+B), calcium magnesium phosphate fertilizer plus biochar (N+B), and sepiolite plus calcium magnesium phosphate fertilizer and biochar (SNB) on the physical and chemical characteristics, heavy metal fraction and distribution, and organic matter content in chicken manure compost. The results showed that the addition of different passivating agents significantly increased the pH in chicken manure organic fertilizer (P<0.05). The seed germination rate was increased after applying of passivation agents, being>80%, and the germination inhibition rate decreased accordingly, whereas the values of electric conductivity (EC) and organic carbon were inhibited. The total nitrogen content and carbon/nitrogen ratio (C/N) were lower than of those before composting, and all of the indicators reached the standard of organic fertilizer maturity. However, differences among the groups after composting were that the pH increase in the compounding treatment was comparatively higher, and that the EC decreased significantly under the treatment of the single sepiolite and calcium magnesium phosphate, whereas the total nitrogen content and C/N ratio of organic carbon were not significantly different in each group. Although the total amount of heavy metals in our organic chicken manure fertilizer increased due to a concentration effect, the proportion of exchangeable heavy metals in the fertilizer decreased, and while the ratio of the residual heavy metals increased. The passivation effect on heavy metals under combined treatments of different materials was better than that of a single agent, and the SNB treatment had the best effect on the passivation of Ni, Zn, As, and Pb. After composting treatment, the concentrations of humic substances (HS) and humic acid (HA) increased significantly (P<0.05), and the highest concentrations increased by 19.8% and 78.9%, respectively. The amount of fulvic acid (FA) decreased by 4.47%-20.11% compared with the initial conditions. Infrared spectroscopy analysis showed that the small molecular substances of polysaccharides increased after composting. In summary, the addition of a passivation agent can promote the heavy metal passivation in chicken manure organic fertilizers to potentially render the compost as harmless.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Magnesium compounds Controlled terms:Animals - Calcium phosphate - Composting - Cultivation - Heavy metals - Infrared spectroscopy - Manures - Nitrogen fertilizers - Organic acids - Organic carbon - Passivation - Phosphate fertilizers - Phosphates - Seed Uncontrolled terms:Chicken manure compost - Concentration effects - Germination inhibition - Heavy metal fractions - Magnesium phosphates - Organic matter content - Physical and chemical characteristics - Total nitrogen content Classification code:531 Metallurgy and Metallography - 539.2.1 Protection Methods - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 1.98e+01%, Percentage 4.47e+00% to 2.01e+01%, Percentage 7.89e+01% DOI:10.13227/j.hjkx.201906121 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796293 Title:Temporal and Spatial Distribution Characteristics and Difference Analysis of Chromophoric Dissolved Organic Matter in Sediment Interstitial Water from Gangnan Reservoir Title of translation:岗南水库沉积物间隙水有色溶解有机物的时空分布特征及差异分析 Authors:Zhou, Shi-Lei (1); Sun, Yue (1); Yuan, Shi-Chao (1); Peng, Rui-Zhe (1); Liu, Shi-Chong (1); Yue, Ge-Cheng (1); Zhang, Hang (1); Wang, Zhou-Qiang (1); Li, Zai-Xing (1); Luo, Xiao (1) Author affiliation:(1) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2635-2645 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The chromophoric dissolved organic matter (CDOM), the main component of dissolved organic matter, affects the morphological characteristics, migration, and conversion of pollutants in water. Based on UV-vis spectra and excitation emission matrix spectroscopy (EEMs) combined with the parallel factor analysis (PARAFAC), the spatial distribution and spectral characteristics were investigated and source analysis of CDOM was performed. Thus, the spatiotemporal differences in the CDOM in Gangnan Reservoir were analyzed. Results showed that a254, a260, a280, and a355 exhibited significant seasonal differences in Gangnan Reservoir, and the order of CDOM concentrations was summer>spring>autumn>winter. There are significant seasonal differences in the E2/E3, E3/E4, E4/E6, and SR of interstitial water CDOM. The concentrations of E2/E3, E3/E4, E4/E6, and SR were high in winter and low in summer. E2/E3 and E3/E4 in autumn and winter were significantly higher than those in spring and summer, and the E3/E4 in autumn and winter was greater than 3.5, which indicates that the CDOM of the autumn and winter sediments has a smaller molecular weight and a lower degree of humification. Protein-like substances (C1), short-wave fulvic acid (C2), and degraded humic substances (C3) were identified by the PARAFAC model, and there was a significant positive correlation among the three fluorescent components (P<0.001). The total fluorescence intensity of CDOM and the fluorescence intensity of each fluorescent component show significant seasonal differences. The total fluorescence intensity and the fluorescence intensity of each component show the highest levels in spring, followed by autumn and winter, and the lowest levels in summer. The proportion of each fluorescent component in autumn and winter and that of each fluorescent component in spring and summer showed no significant difference. There was a significant difference in the proportion of each fluorescent component between autumn/winter and spring/summer. The BIX and FI of CDOM for autumn and winter were higher than those for spring and summer, indicating that the autogenous source of CDOM in autumn and winter is stronger than that in spring and summer, which was consistent with the result of HIX. PCA and Adonis analysis showed that the spectral characteristics of CDOM exhibited obvious seasonal differences (P<0.001). Moreover, the C1, C2, and C3 and water quality parameters (NH4⁺, NO3^-, NO2^-, TDN, and TDP) exhibited significant correlation based on linear regression. The results could provide technical support for the control of organic carbon pollution sources and water quality management in Gangnan Reservoir.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Quality control Controlled terms:Biogeochemistry - Dissolution - Fluorescence - Organic carbon - Quality management - Reservoir management - Reservoirs (water) - Spatial distribution - Springs (components) - Water conservation - Water management - Water pollution - Water pollution control - Water quality Uncontrolled terms:Chromophoric dissolved organic matter - Dissolved organic matters - Excitation emission matrices - Fluorescence intensities - Morphological characteristic - Parallel factor analysis - Temporal and spatial distribution - Water quality parameters Classification code:441.2 Reservoirs - 444 Water Resources - 445.2 Water Analysis - 453 Water Pollution - 453.2 Water Pollution Control - 481.2 Geochemistry - 512.1.2 Petroleum Deposits : Development Operations - 601.2 Machine Components - 741.1 Light/Optics - 802.3 Chemical Operations - 804.1 Organic Compounds - 912.2 Management - 913.3 Quality Assurance and Control - 921 Mathematics DOI:10.13227/j.hjkx.201911274 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071267 Title:Temporal Anaerobic Effect on Aerobic Granular Sludge with Intermittent Influent-Intermittent Aeration Title of translation:厌氧时间对间歇进水-间歇曝气的好氧颗粒污泥系统影响 Authors:Zhang, Jie (1, 2); Wang, Yu-Ying (1); Li, Dong (1); Cao, Si-Yu (1); Li, Shuai (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:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:856-866 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To initiate the domestic sewage aerobic granular sludge (AGS) process, the experiment is operated by intermittent influent-effluent aeration to reduce the concentration of nitrate and the inhibition of PAO, and realize granulation by phosphate precipitation and positive electricity particles generated during phosphorus removal. The sludge from a sewage treatment plant is inoculated into the SBR reactors R1, R2, R3, and R4, for durations of 30, 60, 90, and 120 min total anaerobic time. This was used to study the effect of anaerobic time on the aerobic granular sludge system in domestic sewage. The experiment shows that reactors R1, R2, R3, and R4 are started successfully with 56, 48, 39, and 35 days, respectively. After 105 days of the operation, the respective average particle sizes reached 750, 764, 791, and 650 μm. During the operational period, at the 43^rd and 47^th day, phosphorus removal performance deteriorated in R1 and R2, and it recovered after the anaerobic time was extended to 90 min. The effect of nitrogen and phosphorus removal in R3 is good; at the 63-77 day the granular sludge in R4 disintegrates, and the effect of nitrogen and phosphorus removal and DPAO enrichment is decreased. During the later stage of operation, the effluent in R1, R2, R3, and R4 reaches the IA standard of the discharge standard of pollutants for municipal wastewater treatment plant. The results show that a long anaerobic time can quickly achieve granulation, however the particles easily disintegrate during a long-term operation. Longer anaerobic time can reduce the inhibition of phosphorus accumulating organisms release phosphorus by nitrate, help enrich DPAO, and obtain a better nitrogen and phosphorus removal effect.
© 2020, Science Press. All right reserved. Number of references:51 Main heading:Sewage treatment plants Controlled terms:Effluent treatment - Effluents - Granular materials - Granulation - Nitrates - Nitrogen - Nitrogen removal - Precipitation (chemical) - Sewage - Sewage aeration - Wastewater treatment Uncontrolled terms:Aerobic granular sludges - Anaerobic time - Domestic sewage - Intermittent aeration - Nitrogen and phosphorus removal Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Age 1.73e-01yr to 2.11e-01yr, Age 2.88e-01yr, Age 9.59e-02yr, Size 6.50e-04m, Time 5.40e+03s, Time 7.20e+03s DOI:10.13227/j.hjkx.201908234 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070267 Title:Fabrication of La-MHTC Composites for Phosphate Removal: Adsorption Behavior and Mechanism Title of translation:载镧磁性水热生物炭的制备及其除磷性能 Authors:Song, Xiao-Bao (1, 2); He, Shi-Ying (2); Feng, Yan-Fang (2); Hua, Yun (2); Tang, Wan-Ying (1); Zhu, Qiu-Rong (1, 2); Xue, Li-Hong (2); Yang, Lin-Zhang (2) Author affiliation:(1) School of Chemical Engineering, Nanjing Univesity of Science and Technology, Nanjing; 210094, China; (2) Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing; 210014, China Corresponding author:Tang, Wan-Ying(1269920308@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:773-783 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Lanthanum (La)-based materials have shown great potential for phosphate removal owing to the strong affinity between La and phosphate. In this study, magnetic hydrothermal biochar immobilized La(OH)3 (La-MHTC) were prepared and used as phosphate adsorbents. Hydrochar was produced by the hydrothermal carbonization process (220℃, 2 h). Magnetic La-MHTC with different La-to-Fe mass ratios were synthesized by the co-precipitation method. Subsequently, La-MHTC was applied to remove phosphate from wastewater. Results indicate that La-MHTC (with a La-to-Fe mass ratio of 2: 1) exhibited excellent magnetic properties for easy recovery and high phosphate adsorption capacity up to 100.25 mg•g^-1. Effective phosphate removal was obtained over a wide pH range of 3-10.The absorption isotherm and kinetics were better fitted by the Langmuir model and the pseudo second-order model, respectively, which showed a fast adsorption rate and exhibited superior La utilization efficiency. The La-MHTC has strong selectivity for phosphate in the presence of coexisting ions (Cl^-, NO3^-, and SO4^2-). The adsorption-desorption experiment suggested its excellent stability and cyclic utilization. In addition, La-MHTC was applied to treat real domestic wastewater, efficiently reducing the phosphate concentration (from 0.87 mg•L^-1 to 0.05 mg•L^-1). Electrostatic attraction and inner-sphere complexation between La(OH)3 and P via ligand exchange were the main mechanisms of phosphate adsorption by La-MHTC.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Lanthanum compounds Controlled terms:Adsorption - Carbonization - Magnetism - Precipitation (chemical) - Wastewater treatment Uncontrolled terms:Bio chars - Electrostatic attractions - Hydrothermal - Hydrothermal carbonization - Inner-sphere complexation - Phosphate adsorption capacity - Pseudo-second order model - Real domestic wastewaters Classification code:452.4 Industrial Wastes Treatment and Disposal - 701.2 Magnetism: Basic Concepts and Phenomena - 802.2 Chemical Reactions - 802.3 Chemical Operations Numerical data indexing:Mass_Density 8.70e-04kg/m3 to 5.00e-05kg/m3, Time 7.20e+03s DOI:10.13227/j.hjkx.201906088 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070238 Title:Removal of BPA and EE2 from Water by Mn-Fe Embedded in Acicular Mullite Title of translation:锰铁改性针簇莫来石对水中BPA和EE2的去除 Authors:Zhou, Qiu-Hong (1, 2); Long, Tian-Yu (1); He, Jing (1, 2); Guo, Jin-Song (1); Gao, Jun-Min (1) Author affiliation:(1) College of Environment and Ecology, Chongqing University, Chongqing; 400045, China; (2) Chongiqng Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China Corresponding author:Guo, Jin-Song(guo0768@cqu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:763-772 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Acicular mullite was modified by ferromanganese binary metal oxide (Mn-Fe) to improve the removal efficiency of endocrine disruptors by traditional water treatment practices, using the commercial ceramsite for comparison. The physicochemical properties of synthesized samples were characterized, and batch adsorption experiments were carried out to study the adsorption efficiency of bisphenol A (BPA) and 17α-ethinylestradiol (EE2) on synthesized samples, investigating how solution chemistry and regeneration may affect the adsorption efficiency. Results show that the manganese oxide loaded on the acicular mullite was manganite with an average particle size of 450 nm. After Mn-Fe impregnation, the specific surface area, cumulative pore volume, and mesoporous ratio of the acicular mullite were significantly increased. The virgin acicular mullite had no removal ability for BPA and EE2, and the removal efficiency of BPA and EE2 by Mn-Fe impregnated acicular mullite were significantly increased. Acicular mullite was more suitable as support material for modified filter material. The adsorption kinetics of BPA and EE2 on Mn-Fe-M were fitted with the intra-particle diffusion model, and found to be mainly affected by intra-particle diffusion. The isothermal adsorption data was best fitted to the Langmuir-Freundlich model, and the maximum adsorption capacities of BPA and EE2 were 5.043 mg•g^-1 and 3.990 mg•g^-1, respectively. Thermodynamic experiments showed that the adsorption of BPA and EE2 by Mn-Fe embedded in acicular mullite was an endothermic reaction, and the temperature increase is beneficial to the adsorption. The adsorption amount of BPA and EE2 on Mn-Fe embedded in acicular mullite decreased with increasing pH. The increase of ionic strength favored the adsorption removal of BPA and EE2. The co-existing anion of SO4^2- promoted the adsorption of both BPA and EE2, while CO3^2- and PO4^3- inhibited the adsorption of both BPA and EE2 on Mn-Fe embedded in acicular mullite. The adsorbent regeneration test showed that Mn-Fe embedded acicular mullite was an easily recyclable adsorbent. Mn-Fe embedded in high-porosity acicular mullite can effectively remove typical endocrine disruptors in water, and it can be potentially extensively used to alleviate the problem of low removal efficiency of endocrine disrupting chemicals in traditional water treatment practice.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Manganese alloys Controlled terms:Adsorption - Binary alloys - Chemical water treatment - Diffusion in solids - Efficiency - Endocrine disrupters - Ferroalloys - Ionic strength - Iron alloys - Manganese oxide - Manganese removal (water treatment) - Manganites - Metals - Mullite - Particle size - Physicochemical properties - Silicate minerals Uncontrolled terms:Acicular mullites - Adsorbent regeneration - Batch adsorption experiments - Endocrine disrupting chemicals - Filter materials - Intra-particle diffusion - Low removal efficiencies - Manganes Classification code:445.1 Water Treatment Techniques - 461.7 Health Care - 482.2 Minerals - 543.2 Manganese and Alloys - 545.2 Iron Alloys - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Size 4.50e-07m DOI:10.13227/j.hjkx.201908009 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070231 Title:Analysis of Characteristics and Meteorological Influence Factors of Ozone Pollution in Henan Province Title of translation:河南省臭氧污染特征与气象因子影响分析 Authors:Qi, Yan-Jie (1); Yu, Shi-Jie (1); Yang, Jian (1); Yin, Sha-Sha (1); Cheng, Jia-He (2); Zhang, Rui-Qin (1) Author affiliation:(1) Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou; 450001, China; (2) Henan Meteorological Service, Zhengzhou; 450003, China Corresponding author:Yin, Sha-Sha(shashayin@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:587-599 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The spatio-temporal characteristics of ozone (O3) pollution in the Henan Province in 2017 and its relationship with particulate matter, precursors, and meteorological factors were studied using the data obtained from the air quality monitoring station and national baseline ground climate station. Results showed that the annual mean O3 concentration of a maximum daily 8-h average (MDA8) was 108 μg•m^-3 in the Henan Province with the trend of summer>spring>autumn>winter. Different levels of O3 were observed in various cities. The number of days exceeding the standard was up to 88 days in Anyang, while the lowest was found in Xinyang with 17 days. The most severe of O3 pollution occurred during late spring and early summer. During this period, the average monthly concentration of O3 MDA8 was above 140 μg•m^-3, and peaked in June. The qualitative and quantitative analysis showed that the monthly average concentration of O3 MDA8 was negatively correlated with particulate matter, and the O3 hourly concentration was also negatively correlated with CO and NO2. The O3 MDA8 concentration and meteorological factors (sunshine duration, temperature, rainfall, visibility, humidity, and wind speed) had different correlations during different seasons and various cities.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Particles (particulate matter) Controlled terms:Air quality - Ozone - Springs (components) - Wind Uncontrolled terms:Air quality monitoring stations - Coefficient of divergence - Henan Province - Meteorological factors - Meteorological influence - Qualitative and quantitative analysis - Spatiotemporal characteristics - Temporal-spatial characteristics Classification code:443.1 Atmospheric Properties - 451.2 Air Pollution Control - 601.2 Machine Components - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Age 2.41e-01yr, Age 4.66e-02yr, Time 2.88e+04s DOI:10.13227/j.hjkx.201908122 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070296 Title:Purification Characteristics of Urban Tail Water from Sewage Treatment Plant by Biofilm Ecological Floating Bed Title of translation:生物膜生态浮床对城市尾水净化特征分析 Authors:Zhao, Zhi-Rui (1, 2, 3); Zhang, Jia-Yao (1, 2); Li, Duo (1); Li, Fang-Hong (1) Author affiliation:(1) School of Water Resources and Environment, Hebei GEO University, Shijiazhuang; 050031, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Hebei Province Key Laboratory of Sustainable Use and Development of Water Resources, Shijiazhuang; 050031, China Corresponding author:Zhang, Jia-Yao(2419682961@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:809-814 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The purification characteristics of nitrogenous tail water were investigated using a biofilm ecological floating bed technology to study biofilm length, hydraulic retention time (HRT), and biofilm coverage area with the aim to explore the purification characteristics of biofilm on urban tail water. Results show that the removal rates of NH4⁺-N, NO3^--N, and TN were 90.82%, 62.7%, and 81.96%, respectively, at the half water depth to the suspended biofilm. The removal rate of NH4⁺-N was only 22.07%, and the concentration changes of NO3^--N and TN were not obvious throughout the whole water depth to the suspended biofilm. When the HRT was 6 days, the removal rates of NH4⁺-N and TN could reach 82.01% and 62.88%, respectively, whereas the lowest rates were 55.24% and 46.82%, respectively. When the HRT was 12 days, the removal rates of NH4⁺-N and TN reached up to 81.4% and 79.93%, respectively, whereas the lowest rates were 8.73% and 17.23%, respectively. In contrast, the nitrogen removal efficiency was high and stable when the HRT was 6 days. When the coverage area was 10%, the removal rate was decreased in one operation cycle. When the coverage area was 20%, the removal rate showed an upward trend. Under the conditions of 10% and 20% biofilm coverage area, the removal rates of TN were 62.88% and 71.09%, respectively.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Denitrification Controlled terms:Bacteria - Biofilms - Ecology - Image resolution - Nitrogen removal - Purification - Sewage treatment plants - Water treatment Uncontrolled terms:Concentration change - Coverage area - Denitrifying bacteria - Ecological floating beds - Hydraulic retention time - Nitrogen removal efficiency - Operation cycles - Removal rate Classification code:445.1 Water Treatment Techniques - 452.2 Sewage Treatment - 454.3 Ecology and Ecosystems - 462.5 Biomaterials (including synthetics) - 802.2 Chemical Reactions Numerical data indexing:Age 1.64e-02yr, Age 3.29e-02yr, Percentage 1.00e+01%, Percentage 1.72e+01%, Percentage 2.00e+01%, Percentage 2.21e+01%, Percentage 4.68e+01%, Percentage 5.52e+01%, Percentage 6.27e+01%, Percentage 6.29e+01%, Percentage 7.11e+01%, Percentage 7.99e+01%, Percentage 8.14e+01%, Percentage 8.20e+01%, Percentage 8.73e+00%, Percentage 9.08e+01% DOI:10.13227/j.hjkx.201905150 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071342 Title:Pollution and Deposition Characteristics of Precipitation and Its Source Apportionment in Xi'an City Title of translation:西安市大气降水污染和沉降特征及其来源解析 Authors:Ding, Cheng (1); Yu, Xing-Na (1); Hou, Si-Yu (1) Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China Corresponding author:Yu, Xing-Na(xnyu@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:647-655 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Chemical and deposition characteristics as well as potential sources of precipitation in Xi'an from 2000 to 2017 were analyzed based on the acid deposition monitoring network in East Asia (EANET). The pH of precipitation showed increasing trends, whereas the conductivity of precipitation showed decreasing trends between 2000 and 2017 in Xi'an. The decreasing order of ion concentration in precipitation was as follows: SO4^2->Ca²⁺>NH4⁺>NO3^->Na⁺>Cl^->Mg²⁺>K⁺. The percentage of SO4^2- in the total ion concentration decreased from 38.6% in 2000 to 27.9% in 2017. The ratio of SO4^2- to NO3^- in recent years indicated that the type of pollutant in Xi'an changed from the coal-burning type to the mixed type. The deposition of SO4^2- in precipitation had a declining trend, which was consistent with the results of the Mann-Kendall test. Nitrogen and sulphur depositions in precipitation were 16.89 kg•(hm²•a)^-1 and 33.52 kg•(hm²•a)^-1, respectively, and ammonium nitrogen (NH4⁺-N) was the main deposition component of atmospheric active nitrogen in the precipitation of Xi'an. Vehicle emissions were the major contributors to SO4^2- (15.43%) and NO3^- (72.99%). NH4⁺ originated mainly from agriculture sources, and the percentage reached up to 75.47%.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Deposition Controlled terms:Agricultural robots - Atmospheric chemistry - Chemical analysis - Ionization of gases - Nitrogen - Pollution Uncontrolled terms:Atmospheric precipitation - Chemical characteristic - Deposition characteristics - Potential sources - Xi'an Classification code:443.1 Atmospheric Properties - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 1.54e+01%, Percentage 2.00e+03% to 2.79e+01%, Percentage 3.86e+01%, Percentage 7.30e+01%, Percentage 7.55e+01% DOI:10.13227/j.hjkx.201907221 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278116 Title:Effect of Calcium Magnesium Phosphate on Remediation Paddy Soil Contaminated with Cadmium Using Lime and Sepiolite Title of translation:钙镁磷肥对石灰, 海泡石组配修复镉污染稻田土壤的影响 Authors:Yan, De-Mei (1); Guo, Zhao-Hui (1); Huang, Feng-Lian (2); Ran, Hong-Zhen (1); Zhang, Li (1) Author affiliation:(1) Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha; 410083, China; (2) Hunan Research Institute of Environmental Protection, Changsha; 410004, China Corresponding author:Guo, Zhao-Hui(zhguo@csu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1491-1497 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The combined application of amendments, such as hydroxyhistidine and zeolite, can effectively reduce both the bioavailability of heavy metals in soil and the bioaccumulation of heavy metals by rice, thus improving the safety of agricultural products. In this work, the effect of calcium magnesium phosphorus fertilizer on the content of available Cd in paddy soil and Cd accumulation in various parts of rice by lime combined with sepiolite was studied using a plot experiment. The results show that calcium magnesium phosphorus fertilizer can significantly promote the remediation effect of lime combined with sepiolite. Compared with the treatment with lime combined with sepiolite, the application of calcium magnesium phosphorus fertilizer significantly decreases the available Cd content in the soil and the Cd accumulation in the brown rice. With calcium magnesium phosphorus fertilizer of 2 250 kg•hm^-2, Cd²⁺ in soil formed less soluble cadmium phosphate, the content of extractable, reducible and oxidizable Cd was reduced, and the percentage of available Cd content in the soil was significantly (P<0.05) reduced by 46.97%. Meanwhile, the Cd content in brown rice was decreased to 0.04 mg•kg^-1, which is far lower than the level required by the National Standard for Food Safety (GB 2762-2017) (0.2 mg•kg^-1). In addition, the production of brown rice was increased by 28.34%. Correlation analysis shows that the Cd content in rice roots, straw, and brown rice was positively correlated with the available Cd content in soil (P<0.01), and between the Cd content in brown rice and in roots and straw (P<0.01). In general, the results indicate that the available Cd content in soil was the key factor affecting the Cd content in brown rice. The application of calcium magnesium phosphorus fertilizer can improve the amendment of lime combined with sepiolite for available Cd in soil and reduce the Cd absorption of rice roots and straw so that the Cd content in brown rice is reduced. The results show that the application of calcium magnesium phosphorus fertilizer enhances the effect of reducing the Cd content in brown rice by lime combined with sepiolite. Finally, it can both meet the safety requirements of brown rice quality and increase the yield of brown rice in Cd-contaminated paddy soil.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Soil pollution Controlled terms:Agricultural products - Agricultural robots - Biochemistry - Cadmium - Cadmium compounds - Calcium phosphate - Fertilizers - Food safety - Heavy metals - Lime - Magnesium compounds - Phosphates - Phosphorus - Soils - Zeolites Uncontrolled terms:Cadmium phosphate - Correlation analysis - Heavy metals in soil - Magnesium phosphates - Paddy soils - Phosphorus fertilizer - Safety requirements - Sepiolite Classification code:461.6 Medicine and Pharmacology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2 Biochemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821.4 Agricultural Products Numerical data indexing:Percentage 2.83e+01%, Percentage 4.70e+01% DOI:10.13227/j.hjkx.201909095 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371269 Title:Influencing Factors of Ozone Concentration in Xi'an Based on Generalized Additive Models Title of translation:基于GAM模型的西安市O3浓度影响因素解析 Authors:Huang, Xiao-Gang (1, 2, 3); Shao, Tian-Jie (1); Zhao, Jing-Bo (1, 2); Cao, Jun-Ji (2); Lü, Xiao-Hu (4) Author affiliation:(1) School of Geography and Tourism, Shaanxi Normal University, Xi'an; 710119, China; (2) Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China; (3) College of Geographical Sciences, Shanxi Normal University, Linfen; 041004, China; (4) Hanzhong City Ecological Environment Bureau, Hanzhong; 724200, China Corresponding author:Shao, Tian-Jie(tjshao2010@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1535-1543 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the ozone monitoring data from 2014 to 2018, we presented the variation of ozone concentration in Xi'an and revealed the effects of ozone concentration by meteorological factors based on the generalized additive model (GAM). The results showed that ① with increasing ozone concentration year by year, the assessment standard of ozone pollution was overtaken by three consecutive years since 2016. However, the rising trend was slowed down since 2017 as a result of the strengthened pollution control during summer. ② The monthly curve of ozone concentration was presented as a reversed "V" model with a rising trend accompanying the rising temperature from January to July and a decreasing one during the rest of the year, peaking in July in terms of average monthly ozone concentration. However, this model would turn into an "M" in years with high precipitation when the valley witnessed the highest precipitation in a month. ③ The ozone pollution increased from the year 2014 to 2018 with a stretch-forward ozone polluted time. Furthermore, the rates of ozone non-attainment increased from 1.9% in 2014 to 14% in 2018. In addition, the time ozone pollution emerged advanced from July to May. ④ Based on the GAM model, ozone concentration was non-colinearly related to temperature, air pressure, sunshine duration, and relative humidity. However, the curves of these factors varied considerably, with a positive influence of temperature and sunshine duration and a negative influence of air pressure and relative humidity. The influence of precipitation was mainly witnessed in summers, while no influence of wind was observed. Furthermore, ozone pollution can be easily triggered under the following conditions: temperature>24℃, air pressure <962 hPa, sunshine duration>9 h, and a relative humidity 36%-65% with no rain.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Air pollution Controlled terms:Additives - Atmospheric pressure - Ozone - Pollution control Uncontrolled terms:Generalized additive model - Influence factors - Ozone concentration - Variation features - Xi'an Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally Numerical data indexing:Percentage 1.90e+00%, Percentage 2.01e+03% to 1.40e+01%, Percentage 3.60e+01% to 6.50e+01% DOI:10.13227/j.hjkx.201906067 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408369879 Title:Safety Assessment of Rice Planting in Soil Cadmium Geological Anomaly Areas in Southwest Guangxi Title of translation:桂西南土壤镉地质异常区水稻种植安全性评估 Authors:Chen, Tong-Bin (1, 2); Pang, Rui (1); Wang, Fo-Peng (1); Zhou, Lang (1); Song, Bo (1, 3) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (3) Key Laboratory of Theory and Technology of Environmental Pollution Control in Guangxi, Guilin; 541004, China Corresponding author:Song, Bo(songbo@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1855-1863 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To evaluate the safety of rice planting in cadmium geological anomaly areas, 41 natural soil, 479 paddy soil, and 432 rice samples were collected in southwestern Guangxi. The contents of Cd, Cu, Ni, and Zn and soil physical and chemical properties were measured. The single factor pollution index method (Pi) was used to evaluate the degree of contamination of the sample, and correlation analysis were used to explore the main factors affecting the heavy metal content in rice. The results showed that ① soil pH of the paddy field was 6.8; the organic matter content was 39.00 g•kg^-1; the risk screening value was based on the soil environmental quality standards for soil pollution risk control and control of agricultural land (GB 15618-2018), the exceeding standard rates of Cd, Cu, Ni, and Zn in soil were 60.75%, 2.09%, 0.83%, and 1.88%. ② The over-standard rates of Cd and Ni in rice were 9.03% and 4.39%, respectively. Considering straw as raw material for feed and organic fertilizer, the corresponding over-standard rates of Cd were 6.94% and 1.16%. ③ Correlation analysis showed that soil pH, organic matter, total heavy metal, and available content were the main factors affecting the content of heavy metals in rice. Cd and Ni in the study area all exhibited certain over-standard phenomena, and the low-accumulation rice varieties could be planted to reduce heavy metal content in rice.
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Soil pollution Controlled terms:Agricultural robots - Biogeochemistry - Cadmium - Correlation methods - Factor analysis - Fertilizers - Geology - Heavy metals - Organic compounds - Quality control - Safety engineering - Soil pollution control - Soils Uncontrolled terms:Correlation analysis - Environmental quality standards - Farmland - Guangxi - Heavy metal contents - Organic matter content - Rice - Soil physical and chemical properties Classification code:481.1 Geology - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804 Chemical Products Generally - 804.1 Organic Compounds - 913.3 Quality Assurance and Control - 914 Safety Engineering - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.16e+00%, Percentage 1.88e+00%, Percentage 2.09e+00%, Percentage 4.39e+00%, Percentage 6.08e+01%, Percentage 6.94e+00%, Percentage 8.30e-01%, Percentage 9.03e+00% DOI:10.13227/j.hjkx.201910130 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658841 Title:Spatial and Temporal Succession Characteristics of Aerobic Anoxygenic Photosynthesis Bacteria in a Stratified Reservoir Title of translation:分层型水库水体好氧不产氧光合细菌时空演替特征 Authors:Zhang, Hai-Han (1); Wang, Yan (1); Huang, Ting-Lin (1); Wang, Chen-Xu (1); Lu, Lin-Chao (1); Si, Fan (1); Li, Nan (1); Liu, Kai-Wen (1); Yan, Miao-Miao (1); Miao, Yu-Tian (1) Author affiliation:(1) Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2188-2197 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Aerobic anoxygenic photosynthesis bacteria (AAPB) play a significant role in the material circulation of the hydrosphere, with diverse community structure and unique metabolic functions. To investigate the spatial and temporal succession characteristics of AAPB abundance and community structure in Jinpen Reservoir, a quantitative real-time polymerase chain reaction and Illumina MiSeq high-throughput sequencing technique targeting the pufM gene were applied. Furthermore, redundancy analysis was used to determine the influence of environmental factors on their community structure. The results showed that the AAPB abundance ranged from (6.70±0.43)×10³ to (2.69±0.15)×10⁴ copies•mL^-1, with the maximum value appearing in October, and decreased with an increase in water depth. Samples were mainly classified into 19 genera (except for the unclassified genus); the most abundant AAPB genera were Bradyrhizobium sp. and Methylobacterium sp., which were affiliated to the α-Proteobacteria, and the proportion of the Bradyrhizobium sp. was highest in November, accounting for more than 60% (except 10 m). Furthermore, Rubrivivax sp., belonging to β-Proteobacteria, was found to have a low proportion. There was a strong interaction relationship between AAPB genera. For example, Rhodobacter sp. was positively correlated with Rhodovulum sp., while Hydrogenophaga sp. was negatively correlated with Bradyrhizobium sp.. The community structure composition and distribution of AAPB were significantly different, mainly affected by temperature (T), total nitrogen (TN), NO3^--N, and light intensity and comprehensively regulated by environmental factors. For instance, T, TN, and total phosphorus had a significant impact on the AAPB community structure of water samples at 0, 5, and 15 m in October, whereas light intensity, pH, DO, and chlorophyll-a were major structuring factors in the AAPB assemblages of water samples at 5 m in December. The results have guiding significance for parsing the spatial and temporal variability of AAPB abundance and diversity in stratified reservoirs, and simultaneously provide a theoretical basis for exploring the driving factors of AAPB population structure.
© 2020, Science Press. All right reserved. Number of references:62 Main heading:Aerobic bacteria Controlled terms:Photosynthesis - Polymerase chain reaction - Reservoirs (water) Uncontrolled terms:Anoxygenic photosynthesis - Environmental factors - Guiding significances - High-throughput sequencing - Population structures - Quantitative real-time polymerase chain reaction - Spatial and temporal variability - Stratified reservoirs Classification code:441.2 Reservoirs - 461 Bioengineering and Biology - 741.1 Light/Optics - 801.2 Biochemistry Numerical data indexing:Percentage 6.00e+01%, Size 1.00e+01m, Size 1.50e+01m, Size 5.00e+00m DOI:10.13227/j.hjkx.201910055 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008940 Title:Adsorption of As(Ⅲ) in Water by Iron-loaded Graphene Oxide-Chitosan Title of translation:Fe@GOCS的制备及其对水中As(Ⅲ)的吸附 Authors:Zhao, Chao-Ran (1); Shan, Hui-Mei (1); Zeng, Chun-Ya (1); Zhang, Jin-Xian (1); Peng, San-Xi (2) Author affiliation:(1) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541006, China; (2) College of Earth Science, Guilin University of Technology, Guilin; 541006, China Corresponding author:Shan, Hui-Mei(shanhuimei@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3665-3674 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the principle of self-assembly, graphene oxide, chitosan, and FeCl3•6H2O were mixed to prepare graphene oxide-chitosan coated iron-composite particles (Fe@GOCS). Batch static experiments were carried out to investigate the kinetic and thermodynamic characteristics of As(Ⅲ) adsorption, and to identify the adsorption mechanism. Results showed that the iron on the GOCS was mainly in the form of α-FeO(OH). The As(Ⅲ) adsorption capacity increased with decreasing pH, and the highest adsorption capacity occurred at pH 3. After approximately 45 h, As(Ⅲ) adsorption reached equilibrium under the conditions of pH 3 and a temperature of 298.15, 308.15, and 318.15 K. The maximum adsorption capacity was 289.4 mg•g^-1 for an optimal dosage of adsorbents of 1.0 g•L^-1. After five times of repeated adsorption-desorption, the adsorption capacity increased slightly. The thermodynamic parameters showed that ΔG^θ<0, ΔS^θ>0, and ΔH^θ>0, thus indicating that As(Ⅲ) adsorption on Fe@GOCS was a spontaneous, endothermic, and entropy-increasing reaction, and that a higher temperature was more favorable for As(Ⅲ) adsorption. The pseudo-second-order model provided a good fit of the As(Ⅲ) adsorption kinetics for Fe@GOCS. Compared to the Langmuir isotherm, As(Ⅲ) adsorption experimental data fitted better to the Freundlich and Sips models. In combination with the characterization results, it was found that ion exchange and surface complexation were the main mechanisms of As(Ⅲ) removal from aqueous solution using Fe@GOCS.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Adsorption Controlled terms:Chitosan - Graphene - Ion exchange - Iron oxides - Isotherms Uncontrolled terms:Adsorption capacities - Adsorption desorption - Adsorption mechanism - Composite particles - Pseudo-second order model - Surface complexation - Thermodynamic characteristics - Thermodynamic parameter Classification code:761 Nanotechnology - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.00e+00kg/m3 to 2.20e-02kg/m3, Temperature 3.18e+02K, Time 1.62e+05s DOI:10.13227/j.hjkx.202001183 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256325 Title:Analysis of Pollution Characteristics and Primary, Secondary Contributions of Firework Burnings in Qingdao During the Spring Festival Title of translation:青岛春节期间大气污染特征及烟花燃放一, 二次贡献分析 Authors:Fang, Tian-Ge (1); Yao, Xiao-Hong (1, 2); Meng, He (3); Chen, Chun-Qiang (1) Author affiliation:(1) Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China; (2) Laboratory for Marine Ecology and Environmental Sciences, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266071, China; (3) Environmental Monitoring Center for Qingdao, Qingdao; 266003, China Corresponding author:Yao, Xiao-Hong(xhyao@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4345-4354 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Atmospheric pollution frequently occurs in northern China during winter heating period, wherein nitrate became the dominant driver for PM2.5 accumulations. However, sulfate accumulation was found to be significantly higher than that of nitrate during firework burning events and exhibited different pollution characteristics. Online data available from February 2, 2019 to February 10, 2019, including observation data measured from AIM-IC in suburban Qingdao and meteorological data from national automatic monitoring station, were analyzed. The results showed that particulate accumulation, dust and firework burning events were observed. The primary contribution rates of the most intensive firework burning to PM2.5 and PM10 were 69.8% and 63.8%, respectively. In contrast to a severe accumulation of nitrate during the particulate accumulation event, the sulfate formed prior and exhibited more severe accumulation than nitrate during the firework burning events. The primary contribution factors n(SO4^2-)/n(K⁺) and n(NO3^-)/n(K⁺) of firework burnings was 1.2 and 1.3 (molar ratios), respectively. The secondary contribution factors were 2.1 and 1.6 times, under relatively stable meteorological conditions. However, during the transit of dry and cold air, the value of secondary contribution factors decreased substantially and exhibited nearly the same values as the primary ones.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Particles (particulate matter) Controlled terms:Air pollution - Explosives - Meteorology - Molar ratio - Nitrates - Springs (components) - Sulfur compounds Uncontrolled terms:Atmospheric pollution - Automatic monitoring stations - Meteorological condition - Meteorological data - Northern China - Observation data - Primary contribution - Winter heating Classification code:451 Air Pollution - 601.2 Machine Components - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 6.38e+01%, Percentage 6.98e+01% DOI:10.13227/j.hjkx.202002150 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008913 Title:Quantification of Nitrate Sources to Groundwater in Karst Trough-valley Areas Based on Dual Stable Isotopes of δ¹⁵N-NO3^- and δ¹⁸O-NO3^- and the IsoSource Model Title of translation:基于双同位素(δ¹⁵N-NO3^--δ¹⁸O-NO3^-)和IsoSource模型的岩溶槽谷区地下水硝酸盐来源的定量示踪 Authors:Xu, Lu (1); Jiang, Yong-Jun (1); Duan, Shi-Hui (1); He, Rui-Liang (1) Author affiliation:(1) Chongqing Key Laboratory of Karst Environment, School of Geographical Sciences, Southwest University, Chongqing; 400715, China Corresponding author:Jiang, Yong-Jun(jiangjyj@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3637-3645 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Due to the vulnerability of karst hydrological systems, nitrate pollution in karst groundwater has become a global common and serious environmental problem. In order to ensure drinking water safety, it is very important to accurately identify groundwater nitrate sources. The groundwater hydrochemistry and δ¹⁵N-NO3^- and δ¹⁸O-NO3^- isotopes were analyzed in samples taken from a suburb of Chongqing: the Longfeng karst trough-valley, which is mainly affected by agricultural activities, and the Longche karst trough-valley, which is primarily affected by urbanization. The IsoSource model was then used to quantify the groundwater nitrate sources. The results showed that: ① The NO3^- concentration in groundwater ranged from 19.31 mg•L^-1 to 37.01 mg•L^-1(mean of 28.21 mg•L^-1) in the Longfeng karst trough-valley, and from 2.15 mg•L^-1 to 27.69 mg•L^-1(mean of 10.31 mg•L^-1) in the Longche karst trough-valley. The groundwater NO3^- concentration exhibited an obvious seasonal variation in both valleys. ② The δ¹⁵N-NO3^- and δ¹⁸O-NO3^- isotopes in groundwater in the Longfeng karst trough-valley ranged from 3.29‰ to 11.03‰ (mean of 6.74‰) and 0.88‰ to 7.51‰ (mean of 3.18‰), respectively. In contrast, groundwater in the Longche karst trough-valley presented higher δ¹⁵N-NO3^- and δ¹⁸O-NO3^- values that ranged from 5.25‰ to 11.40‰ (mean of 7.95‰) and 2.90‰ to 19.94‰ (mean of 11.18‰), respectively. The lower values of δ¹⁵N-NO3^- and δ¹⁸O-NO3^- in groundwater in the Longfeng karst trough-valley suggest that groundwater NO3^- was mainly sourced from agricultural N fertilizer, while the higher values of δ¹⁵N-NO3^- and δ¹⁸O-NO3^- in groundwater in the Longche karst trough-valley indicate that groundwater NO3^- was primarily sourced from domestic sewage. Moreover, such δ¹⁵N-NO3^- and δ¹⁸O-NO3^- values in groundwater indicate that nitrification was the primary process for nitrogen conversion in both valleys. Meanwhile, significant seasonal differences in groundwater δ¹⁵N-NO3^- and δ¹⁸O-NO3^- were observed in both valleys; the δ¹⁵N-NO3^- and δ¹⁸O-NO3^- values were higher during the dry season (means of 8. 83‰ and 2. 79‰, respectively) than during the rainy season (means of 4. 64‰ and 3. 58‰, respectively) in the Longfeng karst trough-valley, whereas the δ¹⁵N-NO3^- and δ¹⁸O-NO3^- values were lower during the dry season (means of 9. 79‰ and 14. 56‰, respectively) than during the rainy season (means of 5. 12‰ and 7. 8‰, respectively) in the Longche trough-valley. This suggests that there were differences in the seasonal NO3^- sources to groundwater in both valleys. During the rainy season, the groundwater NO3^- concentration in the Longfeng karst trough-valley was mainly due to the nitrification of NH4⁺ in precipitation and fertilizer as well as organic nitrogen in soil, whereas during the dry season, the groundwater NO3^- concentration primarily originated from domestic sewage. In contrast, the groundwater NO3^- concentration in the Longche karst trough-valley primarily originated from domestic sewage in both seasons. ③ The results of the IsoSource model indicated that the nitrification of NH4⁺ from fertilizer and rainwater was the primary NO3^- source to groundwater (44.63% of the total) in the Longfeng trough valley, and was followed by domestic sewage (29.5%), soil organic nitrogen (22.38%), and NO3^- from rainwater and fertilizer (<10%). During the rainy season, the groundwater NO3^- concentration was mainly due to the nitrification of NH4⁺ from fertilizer and rainwater (52.25% of the total) in Longfeng trough-valley, while groundwater NO3^- concentration primarily originated from domestic sewage during the dry season (41% of the total). In contrast, the groundwater NO3^- concentration was mainly from domestic sewage (36.17%) in Longche karst trough-valley, and was followed by the nitrification of NH4⁺ from fertilizer and rainwater (23.5%), soil organic nitrogen (22.5%), and NO3^- from rainwater and fertilizer (<10%). The groundwater NO3^- concentration in the Longche karst trough-valley primarily originated from domestic sewage in both seasons, and accounted for 47% and 25% during the rainy season and dry season, respectively.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Landforms Controlled terms:Agricultural robots - Agriculture - Drought - Groundwater - Groundwater geochemistry - Groundwater pollution - Isotopes - Nitrates - Nitrification - Nitrogen fertilizers - Potable water - Sewage - Soils Uncontrolled terms:Agricultural activities - Environmental problems - Groundwater nitrates - Hydrological system - Karst groundwater - Nitrogen conversion - Seasonal differences - Seasonal variation Classification code:444 Water Resources - 444.2 Groundwater - 452.1 Sewage - 481.1 Geology - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Mass_Density 1.03e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 2.82e-02kg/m3 to 2.20e-02kg/m3, Percentage 2.24e+01%, Percentage 2.25e+01%, Percentage 2.35e+01%, Percentage 2.50e+01%, Percentage 2.95e+01%, Percentage 3.62e+01%, Percentage 4.10e+01%, Percentage 4.46e+01%, Percentage 4.70e+01%, Percentage 5.22e+01% DOI:10.13227/j.hjkx.201909230 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008864 Title:Pollution Characteristics and Sensitivity Analysis of Atmospheric Ozone in Taian City Title of translation:泰安市大气臭氧污染特征及敏感性分析 Authors:Li, Kai (1); Liu, Min (1); Mei, Ru-Bo (1) Author affiliation:(1) Monitoring Center for Ecological Environment of Taian, Tai'an; 271000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3539-3546 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Online monitoring of ozone (O3) and its precursors was carried out at urban stations in Taian City from May to July, 2018. The pollution characteristics of O3 and its precursors and the sensitivity of O3 generation to its precursors were also analyzed based on the characteristic ratio method and a photochemical model. The results indicated that Taian City was suffering from serious O3 pollution during the observation period. The daily variation of the O3 concentration exhibited an obvious convex trend with the highest value at approximately 15: 00, whereas the concentrations of nitrogen oxide (NOx) and VOCs had decreasing trends during the daytime and increasing trends during the night. It was concluded from the results of the characteristic ratio methods (OPE, VOCs/NOx, and H2O2/NOz) and the empirical kinetics modeling approach (EKMA) curve method that the photochemical generation of O3 in Taian was controlled by the NOx concentration and the transition area, which means that reducing the emissions of NOx and VOCs has a controlling effect on O3 pollution. Additionally, the results of the EKMA curve method also showed that the best effect of O3 concentration control could be achieved by reducing the concentration of O3 precursors, and reducing the concentrations of VOCs (propylene equivalent, PE) and NOx according to a PE: NOx concentration ratio of 8: 3.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Air pollution Controlled terms:Atmospheric chemistry - Nitrogen oxides - Ozone - Sensitivity analysis Uncontrolled terms:Characteristic ratio - Concentration control - Concentration ratio - Empirical kinetics model - Observation Period - Online monitoring - Photochemical generation - Photochemical modeling Classification code:443.1 Atmospheric Properties - 451 Air Pollution - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 921 Mathematics DOI:10.13227/j.hjkx.201912046 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105329 Title:Influence of Potamogeton crispus on Lake Water Environment and Phytoplankton Community Structure Title of translation:菹草对湖泊水质及浮游植物群落结构的影响 Authors:Kang, Li-Juan (1, 2); Xu, Hai (1); Zou, Wei (1, 2); Zhu, Guang-Wei (1); Zhu, Meng-Yuan (1); Ji, Peng-Fei (3); Chen, Jie (3) 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) School of Environment and Civil Engineering, Jiangnan University, Wuxi; 214122, China Corresponding author:Xu, Hai(hxu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4053-4061 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The decomposition of submerged macrophytes is generally associated with dramatic changes in the water environment, such as the large release of nutrients (e.g., nitrogen and phosphorus) and organic carbon to the surrounding waters, which may result in significant changes in phytoplankton community structure. In this study, Potamogeton crispus, physicochemical variables, and phytoplankton samples were collected in 14 shallow lakes in the middle and lower Jianghuai Plain in spring (growing period of P. crispus) and summer (decomposition phase of P. crispus) of 2018. The effects of the decline of P. crispus on water quality and phytoplankton community structure were quantified. The results showed that water transparency increased significantly in spring because the growth of P. crispus inhibits sediment resuspension and macrophytes can transport the nutrients from the water column to the sediment. The values of dissolved oxygen and pH also increased significantly due the photosynthesis by macrophytes. In contrast, the decomposition of P. crispus during summer months caused a significant increase in water turbidity and organic matter. There were considerable differences in phytoplankton biomass and cyanobacterial biomass in the sites with or without P. crispus, and the corresponding ratios of cyanobacterial biomass to the total algal biomass were 18.96% and 34.05%, respectively. Higher values of cyanobacterial biomass were observed with the decomposition of P. crispus than its counterpart in summer because ① the decomposition of macrophytes provided sufficient organic matter and nutrient (nitrogen and phosphorus) resources for cyanobacterial growth; ② P. crispus decline in summer significantly increased water turbidity, which makes cyanobacteria occupy a better ecological niche and more efficiently utilize nitrogen and phosphorus.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Biochemical oxygen demand Controlled terms:Biogeochemistry - Biomass - Dissolved oxygen - Ecology - Lakes - Nitrogen - Nutrients - Organic carbon - Phosphorus - Phytoplankton - Springs (components) - Turbidity - Water quality Uncontrolled terms:Lake water environments - Nitrogen and phosphorus - Phytoplankton biomass - Phytoplankton community - Phytoplankton samples - Sediment re suspensions - Submerged macrophytes - Water transparency Classification code:445.2 Water Analysis - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 481.2 Geochemistry - 601.2 Machine Components - 741.1 Light/Optics - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.90e+01%, Percentage 3.40e+01% DOI:10.13227/j.hjkx.202002006 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008881 Title:Characteristics and Sources of 12 Trace Amount Elements in PM2.5 During a Period of Heavy Pollution in Huanggang, Central China Title of translation:华中地区黄冈市一次重度污染期间PM2.5中12种微量元素特征及来源解析 Authors:Chen, Zhan-Le (1); Tian, Qian (1); Mao, Yao (2); Liu, Wei-Jie (1); Shi, Ming-Ming (1, 2); Cheng, Cheng (1); Hu, Tian-Peng (1); Xing, Xin-Li (1, 2); Qi, Shi-Hua (1, 2); Hu, Jin-Xu (3) Author affiliation:(1) Laboratory of Basin Hydrology and Wetland Eco-restoration, 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; (3) Environmental Monitoring Station in Huanggang, Huanggang; 438000, China Corresponding author:Xing, Xin-Li(39020194@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3475-3483 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study provides data and theoretical support for the prevention and control of air pollution in central China. From January 13, 2018, to January 25, 2018, 48 PM2.5 samples were collected in Huanggang by particulate matter samplers during a severe pollution episode. Twelve elements (Li, Be, V, Se, Sr, Mo, Ag, Ba, Tl, Th, Bi, and U) were analyzed by ICP-MS. A positive definite matrix factor (PMF), trajectory model of the cluster analysis, potential source analysis (PSCF), and the concentration weight analysis method (CWT) were applied to analyze the potential pollution sources and determine the transmission channel. The results showed that the internal cause of the pollution was the appearance of static, stable, and high humidity meteorological conditions, while the external cause was the input of pollution. Five types of pollution source were determined: fuel combustion (10.59%), crustal (24.22%), industry (3.16%), coal (47.57%), and traffic (14.45%). Two main types of air flow path were found; short distance transmission accounted for 62.50% whereas long distance transport accounted for 37.50%. The major contributors to the pollution included central and eastern Hubei, northeastern Hunan, southwestern Anhui, and southern Henan. North-south transmission channels were observed for central China. In addition to local pollution, the impact of regional transmission should not be ignored. In the emergency response period for heavy pollution during the autumn and winter, all regions need to control emission reduction measures. Joint prevention and control are the keys to air pollution control.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Trace elements Controlled terms:Air pollution - Cluster analysis - Coal combustion - Coal industry - Emission control - Fuels - Transmissions Uncontrolled terms:Long-distance transport - Meteorological condition - Positive-definite matrices - Potential pollutions - Prevention and controls - Short-distance transmission - Trajectory modeling - Transmission channels Classification code:451 Air Pollution - 451.2 Air Pollution Control - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 602.2 Mechanical Transmissions - 723 Computer Software, Data Handling and Applications Numerical data indexing:Percentage 1.06e+01%, Percentage 1.44e+01%, Percentage 2.42e+01%, Percentage 3.16e+00%, Percentage 3.75e+01%, Percentage 4.76e+01%, Percentage 6.25e+01% DOI:10.13227/j.hjkx.202001066 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371242 Title:Electrocatalytic Oxidation of Sulfadiazine with Ni-Doped Sb-SnO2 Ceramic Ring Particle Electrode Title of translation:Ni掺杂Sb-SnO2瓷环粒子电极电催化氧化磺胺嘧啶 Authors:Shi, Qiu-Jun (1); Liu, An-Di (1); Tang, Bo-Bin (2); Wei, Shi-Qiang (1); Zhang, Jin-Zhong (1) Author affiliation:(1) Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Technical Center, Chongqing Customs, Chongqing; 400020, China Corresponding author:Zhang, Jin-Zhong(jzhzhang@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1725-1733 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The excessive use and abuse of antibiotics has brought about serious threats to water environmental safety and human health. It is necessary to develop efficient, cheap, and environmentally friendly treatment technologies for antibiotics. In this work, a Ni-doped Sb-SnO2 microporous ceramic ring particle electrode was prepared by the dipping method and characterized by scanning electron microscopy, energy dispersion spectroscopy, and X-ray diffraction. The electrocatalytic oxidation ability and kinetic characteristics of sulfadiazine (SDZ) were studied using the prepared electrode, and the degradation pathways of SDZ were analyzed preliminarily. The results showed that Ni and Sb-SnO2 crystals were loaded on the particle electrode surface, which is beneficial for electron transfer and SDZ adsorption and improvement of electrocatalytic oxidation efficiency. Under the conditions of 0.02 mol•L^-1 NaCl solution (pH 8), 15 mA•cm^-2 of current density, and 15 g particle electrode, 50 mg•L^-1 SDZ could be completely removed on the three-dimensional electrode within 15 min. The removal efficiency of TOC in the reaction solution reached 80.8% for 3 h degradation and was 17.6% higher than that with two-dimensional electrode. The kinetic process of the electrocatalytic oxidation could be well described by the first-order reaction kinetic model, and the rate constant was 0.329 min^-1. The degradation products of SDZ were identified by liquid chromatography-tandem mass spectrometry (LC-MS/MS), and the possible pathways of electrocatalytic degradation mainly include the fractures of S-N bond on sulfamido and C-N bond on pyrimidine ring, desulfonation, deamination, and •OH oxidation.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Antimony compounds Controlled terms:Amines - Antibiotics - Degradation - Electrocatalysis - Electrodes - Health risks - Kinetics - Liquid chromatography - Mass spectrometry - Nickel metallography - Oxidation - Rate constants - Scanning electron microscopy - Sodium chloride Uncontrolled terms:Degradation pathways - Electro-catalytic oxidation - Ni-doping - Particle-electrode - Sulfadiazine Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 531.2 Metallography - 801 Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 931 Classical Physics; Quantum Theory; Relativity Numerical data indexing:Current_Density 1.50e+02A/m2 to 2.20e-01A/m2, Mass 1.50e-02kg, Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Molar_Concentration 2.00e+01mol/m3 to 2.20e-02mol/m3, Percentage 1.76e+01%, Percentage 8.08e+01%, Time 1.08e+04s, Time 9.00e+02s DOI:10.13227/j.hjkx.201910110 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008863 Title:Distribution and Potential Nitrification Rates of Aerobic Ammonia-Oxidizing Microorganisms in Surface Sediments of Mangrove in Sanya River Title of translation:三亚河红树林表层沉积物中好氧氨氧化微生物的分布特征及潜在硝化速率 Authors:Luo, Qing (1, 2); Zhen, Yu (1, 2, 3); Peng, Zong-Bo (4); He, Hui (5) 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) Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao; 266071, China; (4) College of Ecology and Environment, Hainan Tropical Ocean University, Sanya; 572022, China; (5) College of Marine Life Science, Ocean University of China, Qingdao; 266003, China Corresponding author:He, Hui(hehui@ouc.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3787-3796 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The ammonia oxidation process is a rate-limiting step in nitrification. Ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) are the major drivers of ammonia oxidation. Their distribution and relative contributions to nitrification are the research highlights in the nitrogen cycle. Real-time quantitative polymerase chain reaction (qPCR) was used to study the distribution of aerobic ammonia-oxidizing microorganisms in the surface sediments of mangrove in the Sanya River, and the relative contribution rates of AOB and AOA to nitrification were calculated through the determination of the potential nitrification rates (PNR). The results showed that, in most sampling sites, the abundance of AOA amoA genes was higher than that of AOB amoA genes. The abundance of AOB was higher during the winter, whereas that of AOA was higher during the summer, and the ratio of AOA to AOB abundance was lower during the winter. The dissolved oxygen (DO) content, pH, total organic carbon (TOC) content, and nitrate concentration greatly influenced the abundance of AOB and AOA. The potential nitrification rates of AOB and AOA were both higher during the summer than during the winter, and the relative contribution rate of AOA to nitrification was higher during the winter, whereas that of AOB was higher during the summer. There were no significant correlations between the PNR and amoA genes abundance of AOB and AOA.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Nitrification Controlled terms:Ammonia - Bacteria - Dissolved oxygen - Genes - Organic carbon - Oxic sediments - Polymerase chain reaction - Reaction rates - Surficial sediments Uncontrolled terms:Ammonia oxidizing archaea (AOA) - Ammonia oxidizing bacteria - Dissolved oxygen contents - Nitrate concentration - Potential nitrification - Quantitative polymerase chain reaction - Relative contribution - Total Organic Carbon Classification code:461.2 Biological Materials and Tissue Engineering - 483 Soil Mechanics and Foundations - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201912116 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796278 Title:Spatial and Temporal Characteristics of AOD and Angström Exponent in the Yangtze River Delta Based on MODIS_C061 Title of translation:基于MODIS_C061的长三角地区AOD与Angström指数时空变化分析 Authors:Zhang, Ying-Lei (1); Cui, Xi-Min (1) Author affiliation:(1) College of Geoscience and Surveying Engineering, China University of Mining & Technology(Beijing), Beijing; 100083, China Corresponding author:Cui, Xi-Min(cxm@cumtb.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2617-2624 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Considering the Yangtze River Delta as the research region, the applicability of the Terra-MODIS C061 deep blue algorithm (DB) AOD products was evaluated using Aerosol Robotic Network (AERONET) ground-based observations. The results demonstrated that the correlation between Terra-MODIS C061 deep blue algorithm (DB) aerosol optical depth (AOD) and AERONET AOD was high (0.95). Characteristics of spatial distribution and temporal variation of AOD and Angström exponent (AE) from 2000 to 2018 in the study area were analyzed using MOD04_L2 products from 2000 to 2018. The results showed that the AOD in the Yangtze River Delta was distributed as "eastern and northern plains high and southern and western mountains low". The AE showed a "northern low and south high" pattern. In terms of temporal distribution, from 2003 to 2007, the annual average AOD increased significantly, with a growth rate of 23%. After 2011, the AOD showed a downward trend. From 2001 to 2003, the annual average of AE rapidly increased, while after 2012, the AE decreased gradually. The AOD showed obvious seasonal changes in the Yangtze River Delta region, with high values in summer and low values in winter. The highest AOD was observed in June (0.84) in all monthly averages, while the lowest was observed in August (0.40). The seasonal average AE was high in autumn and low in spring. The highest AE of 1.47 was observed in September in all monthly averages, and the lowest of 1.08 was observed in March. Aerosol types in the Yangtze River Delta region were investigated according to the relationship between AOD and AE. The results suggested that the urban industrial aerosol was the main aerosol type in the region, followed by mixed type and clean continental aerosols.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Rivers Controlled terms:Aerosols - Optical correlation - Radiometers - Supercomputers Uncontrolled terms:Aerosol optical depths - Aerosol robotic networks - Deep blue algorithms - Ground-based observations - Temporal characteristics - Temporal distribution - Temporal variation - Yangtze river delta Classification code:722.4 Digital Computers and Systems - 741.1 Light/Optics - 944.7 Radiation Measuring Instruments Numerical data indexing:Percentage 2.30e+01% DOI:10.13227/j.hjkx.201909273 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256518 Title:Activating Efficiency of Iron-copper Bimetallic Organic Framework MIL-101(Fe, Cu) Toward H2O2 for Degradation of Dyes Title of translation:铁铜双金属有机骨架MIL-101(Fe, Cu)活化双氧水降解染料性能 Authors:Liang, He (1, 2); Liu, Rui-Ping (2, 3); An, Xiao-Qiang (3); Liu, Hui-Juan (3) Author affiliation:(1) School of Environment, Northeast Normal University, Changchun; 130117, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Center for Water and Ecology, School of Environment, Tsinghua University, Beijing; 100084, China Corresponding author:Liu, Rui-Ping(liuruiping@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4607-4614 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Practical use of heterogeneous Fenton-like catalysis is inhibited by poor mass transfer and slow conversion of Fe(Ⅲ) to Fe(Ⅱ). In this study, we prepared a novel iron-copper bimetallic organic framework (MIL-101 (Fe, Cu)) using the solvothermal method, and carefully investigated its interfacial characters, catalytic efficacy toward dyes with methylene blue as a model pollutant, and the catalytic activating mechanisms involved in it. The MIL-101(Fe, Cu) exhibited a three-dimensional octahedral shape with a complete crystal structure. The specific BET surface area and average pore size were determined to be as high as 667.2 m²•g^-1 and 1.9 nm, respectively. These characteristics benefits the exposure of the reactive sites and accelerates mass transfer accordingly. The MIL-101(Fe, Cu)/H2O2 exhibited promising efficiency toward the degradation of methylene blue in a wide pH range; moreover, at a pH value of 5, the removal efficiency observed was as high as 100% after 20 min of reaction, which was 43.1% and 88.9% higher than that of MIL-101(Fe)/H2O2 and H2O2, respectively. Hydroxyl radical (•OH) is a dominant active species involved in the degradation of methylene blue using MIL-101(Fe, Cu)/H2O2 as indicated in radicals quenching experiments. The results of species transformation in Fe and Cu indicated that Cu(Ⅱ) doping provided more active sites, and the Cu(Ⅱ)/Cu(Ⅰ) and Fe(Ⅲ)/Fe(Ⅱ) cycles synergistically facilitated •OH generation to improve the Fenton-like catalytic efficiency accordingly. The MIL-101(Fe, Cu) as a novel heterogeneous Fenton-like catalyst achieved good performance without any significant pH adjustment and is practically viable for industrial wastewater treatment.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Iron compounds Controlled terms:Aromatic compounds - Chemical activation - Copper - Copper compounds - Crystal structure - Efficiency - Industrial water treatment - Iron - Mass transfer - Oxidation - pH - Pore size - Wastewater treatment Uncontrolled terms:Catalytic efficiencies - Heterogeneous fenton - Heterogeneous Fenton-like catalysts - Hydroxyl radicals - Industrial wastewater treatment - Removal efficiencies - Solvothermal method - Species transformation Classification code:445.1.2 Water Treatment Techniques for Industrial Use - 452.4 Industrial Wastes Treatment and Disposal - 544.1 Copper - 545.1 Iron - 641.3 Mass Transfer - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804.1 Organic Compounds - 913.1 Production Engineering - 933.1.1 Crystal Lattice - 951 Materials Science Numerical data indexing:Percentage 1.00e+02%, Percentage 4.31e+01%, Percentage 8.89e+01%, Size 1.90e-09m, Specific_Surface_Area 6.67e+05m2/kg, Time 1.20e+03s DOI:10.13227/j.hjkx.202003024 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106072 Title:Treatment of Wastewater Containing Naphthalene Sulfonic Acid by Persulfate Oxidation Title of translation:过硫酸盐氧化处理含萘磺酸废水 Authors:Zhang, Jin-Men (1, 2); Lu, Jun (1, 2); Liu, Xiao-Chen (1, 2); Chen, Quan-Yuan (1, 2) Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) Shanghai Institute of Pollution Control and Ecological Safety, Shanghai; 200092, China Corresponding author:Chen, Quan-Yuan(qychen@dhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4133-4140 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Naphthalene sulfonic acid is widely used in the industry. In this study, H acid (1-amino-8-naphthol-3,6-disulfonic acid) was selected as the characteristic pollutant, and the alkali-activated, thermally-activated, and alkali-heat-complex activated persulfate (PS) degradation of H acid was analyzed. The effects of other factors on complex activation were discussed. The experimental results showed that with the addition of calcium oxide from 0 to 1250 mg•L^-1, the H acid removal rate increased from 42.5% to 82.8% after 100 min of reaction. The removal rate of H acid in thermal activation is positively correlated with temperature. The removal rate of H acid at 65℃ is 77.5%, and the apparent activation energy is 37.85 kJ•mol^-1. Although composite activation speeds up the reaction rate, rapid degradation of PS at high temperatures caused the degradation of H acid to be worse than single thermal activation. The change in PS concentration did not significantly improve the removal rate of H acid, and the inorganic anion CO3^2- was not conducive to the removal of H acid. Compound activation is not ideal for the mineralization of H acid, and the removal rate of TOC is only 16%. GC-MS identified the degradation product of H acid as terephthalic acid, indicating that phthalic anhydride may be formed after the naphthalene ring is opened.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Activation energy Controlled terms:Calcium oxide - Degradation - Lime - Naphthalene - Wastewater treatment Uncontrolled terms:Activated persulfate - Apparent activation energy - Degradation products - Persulfate oxidation - Phthalic anhydrides - Terephthalic acids - Thermal activation - Thermally activated Classification code:452.4 Industrial Wastes Treatment and Disposal - 802.2 Chemical Reactions - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 1.25e+00kg/m3, Percentage 1.60e+01%, Percentage 4.25e+01% to 8.28e+01%, Percentage 7.75e+01%, Time 6.00e+03s DOI:10.13227/j.hjkx.202003141 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308795571 Title:Environmental Characteristics and Source Apportionment of Heavy Metals in the Sediments of a River-Lake System Title of translation:"河-湖"沉积物重金属环境特征及来源解析 Authors:Li, Yue-Zhao (1); Chen, Hai-Yang (1); Sun, Wen-Chao (1) Author affiliation:(1) Engineering Research Center of Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing; 100875, China Corresponding author:Chen, Hai-Yang(chen.haiyang@bnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2646-2652 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the geochemical characteristics and ecological risks of heavy metals in the sediments of a river-lake system were comprehensively identified and the spatial distribution was analyzed. Meanwhile, the potential sources of heavy metals in the sediments were apportioned using the positive matrix factorization model (PMF). The elements Cd, Cu, and Zn were identified as the main pollutants in the sediments of the river-lake system; in particular, Cd indicated an ecological risk. Compared with receiving lakes, the river is more polluted and poses a more significant risk. Spatial analysis of the lake suggested that the entrance of rivers had a relatively higher pollution degree and risk, indicating that rivers may be an important channel to transfer pollutants into the lake. PMF modelling showed that the heavy metals in the sediments were mainly associated with human activities (55.7%), including industrial emissions (20.3%), fertilizer application (19.5%), and aquaculture (15.9%).
© 2020, Science Press. All right reserved. Number of references:36 Main heading:River pollution Controlled terms:Factorization - Heavy metals - Industrial emissions - Lake pollution - Lakes - Risk assessment - Rivers - Sediments - Spatial variables measurement Uncontrolled terms:Environmental characteristic - Fertilizer applications - Geochemical characteristic - Pollution degree - Positive matrix factorization models - Potential sources - Source apportionment - Spatial analysis Classification code:451.1 Air Pollution Sources - 453 Water Pollution - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics - 943.2 Mechanical Variables Measurements Numerical data indexing:Percentage 1.59e+01%, Percentage 1.95e+01%, Percentage 2.03e+01%, Percentage 5.57e+01% DOI:10.13227/j.hjkx.201910215 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071280 Title:Vehicle Emission Inventory and Scenario Analysis in Liaoning from 2000 to 2030 Title of translation:辽宁省2000~2030年机动车排放清单及情景分析 Authors:Jin, Jia-Xin (1); Sun, Shi-Da (1); Wang, Peng (2); Lin, Ying-Chao (1); Wang, Ting (1); Wu, Lin (1); Wei, Ning (1); Chang, Jun-Yu (1); Mao, Hong-Jun (1) Author affiliation:(1) Urban Transport Emission Control Research Centre, College of Environmental Science and Engineering, Nankai University, Tianjin; 300071, China; (2) Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong; 999077, Hong Kong Corresponding author:Mao, Hong-Jun(hongjun_mao@hotmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:665-673 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Vehicle emissions have become a major source of air pollution in urban cities. The vehicle emission inventory of the Liaoning province from 2000 to 2030 was established based on the COPERT model and ArcGIS, and the temporal and spatial distribution characteristics of six pollutants (CO, NMVOC, NOx, PM10, SO2, and CO2) were analyzed. Taking 2016 as the base year, eight scenarios of control measures were designed based on scenario analysis, and the effects of different scenarios on emission reduction were assessed. Results showed that during 2000-2016, CO, NMVOC, NOx, and PM10 emissions at first exhibited increasing trends, after which they decreased. Emissions of SO2 exhibited fluctuating trends, while the emissions of CO2 showed a continuous increase. Passenger cars and motorcycles were the main contributors of CO and NMVOC emissions. Heavy-duty trucks and buses were the main sources of NOx and PM10 emissions. Passenger cars were the major contributors to SO2 and CO2 emissions. Vehicle emissions were significantly higher in the central and southern in Liaoning Province. At the city level, vehicle emissions were mainly concentrated in Shenyang and Dalian. The scenario analysis showed that the implementation of stricter vehicle emission standards can enhance the emission reduction effect. Moreover, accelerating the implementation of new emission standards was beneficial to reduce emissions. The integrated scenario would achieve the maximum emission reduction, with reduction rates of CO, NMVOC, NOx, PM10, CO2, and SO2 at 30.7%, 14.3%, 81.7%, 29.4%, 12.3%, and 12.1%, respectively.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Air quality Controlled terms:Automobiles - Carbon dioxide - Emission control - Nitrogen oxides Uncontrolled terms:COPERT - Emission inventories - Liaoning - Scenario analysis - Vehicle pollution Classification code:451.2 Air Pollution Control - 662.1 Automobiles - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.21e+01%, Percentage 1.23e+01%, Percentage 1.43e+01%, Percentage 2.94e+01%, Percentage 3.07e+01%, Percentage 8.17e+01% DOI:10.13227/j.hjkx.201904268 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517595 Title:Photocatalytic Degradation of Tetracycline and Copper Complex by Bi2MoO6/Bi2S3 Heterojunction Title of translation:Bi2MoO6/Bi2S3异质结光催化降解四环素-铜复合物 Authors:Huang, Wen-Xin (1); Wei, Hu (1); Jiang, Cai-Yun (2); Wang, Yu-Ping (1) Author affiliation:(1) Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing; 210023, China; (2) Jiangsu Engineering and Research Center of Food Safety, Jiangsu Institute of Commerce Department of Engineering and Technology, Nanjing; 210007, China Corresponding author:Wang, Yu-Ping(wangyuping@njnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5488-5499 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Bi2MoO6/Bi2S3 heterojunctions were synthesized by the solvothermal method. The morphology, chemical composition, and photoelectric properties of the heterojunction materials were characterized by XRD, TEM, UV-Vis, XPS, and I-T. Tetracycline (TC) and tetracycline-copper (TC-Cu) composites were degraded by the as-prepared heterojunctions under visible light. The effects of pH, initial concentration of TC, and molar ratio of TC to Cu²⁺ on the degradation deficiency of TC were investigated. Additionally, the main active radicals, intermediates, and mechanisms were ascertained by in situ capture experiments and the identification of intermediates. The toxicities of TC and TC-Cu before and after degradation were evaluated by chlorella growth inhibition experiments. The results showed that the prepared Bi2MoO6/Bi2S3 heterojunction was a uniform nanosheet and its band gap was 1.76 eV. Bi2MoO6 and Bi2S3 with a mass ratio of 3:1 (MS-0.3) exhibited a composite ratio of TC and Cu²⁺ was 2:1 and had the best photocatalytic performance. When the concentration of TC was 10 mg•L^-1 with neutral solutions, after reacting for 60 min, the degradation rate of TC and mineralization rate of the solution for TC-Cu were 85.63% and 52.94%, respectively. The results of active group capture experiments showed that the main active group of the heterojunction was the •O2^- radical in visible light. In addition, the results of growth inhibition experiments showed that the presence of Cu²⁺ reduces the toxicity of TC photocatalytic degradation products in the TC-Cu complex, and the antibiotics can be effectively removed in the TC-Cu complex by photocatalytic oxidation.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Bismuth compounds Controlled terms:Copper compounds - Degradation - Energy gap - Heterojunctions - Layered semiconductors - Light - Molar concentration - Molar ratio - Molybdenum compounds - Toxicity Uncontrolled terms:Chemical compositions - Growth inhibition - Initial concentration - Photo catalytic degradation - Photocatalytic oxidations - Photocatalytic performance - Photoelectric property - Solvothermal method Classification code:461.7 Health Care - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 802.2 Chemical Reactions Numerical data indexing:Electron_Volt 1.76e+00eV, Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 5.29e+01%, Percentage 8.56e+01%, Time 3.60e+03s DOI:10.13227/j.hjkx.202001213 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517611 Title:Spatial Distribution, Contamination Assessment, and Sources of Heavy Metals in the Urban Green Space Soils of a City in North China Title of translation:中国北方某市城市绿地土壤重金属空间分布特征,污染评价及来源解析 Authors:Zhao, Liang (1); Liang, Yun-Ping (2); Chen, Qian (3); Xu, Qian (1); Jing, Hong-Wei (1) Author affiliation:(1) Beijing Municipal Ecological and Environmental Monitoring Center, Beijing; 100048, China; (2) Beijing Radiation Safety Technology Center, Beijing; 100089, China; (3) College of Environmental Sciences and Engineering, Peking University, Beijing; 100871, China Corresponding author:Jing, Hong-Wei(jinghongwei@bjmemc.com.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5552-5561 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the condition of urban green space soils in the central parts of a city in North China, the spatial distribution, sources, and pollution levels of heavy metals (Cd, Hg, As, Pb, Cr, Cu, Zn, and Ni) within green space soils in the central urban districts of the city were investigated. The results showed that the soil quality was high overall. The mean concentrations of Cd, Hg, As, Pb, Cr, Cu, Zn, and Ni were 0.172, 0.202, 9.02, 34.7, 57.0, 31.2, 85.7, and 26.3 mg•kg^-1, respectively. The mean concentrations of Cd, Hg, Pb, and Zn in urban soils exceeded the background value of the Beijing-Tianjin-Tangshan region. All of the samples' heavy metal concentrations were lower than the risk screening values for soil contamination of development land in the national soil environment quality standards. With respect to the spatial distribution, the concentrations of As, Cr, and Ni were higher in the northwest of the study area, the concentrations of Cd and Zn were higher in the northeast, and the concentrations of Hg, Pb, and Cu were higher in the urban core area. As for the different land use types of the soils, the concentrations of Cd, Zn, and Ni were higher in the enterprise soils, while the concentrations of Hg, Pb, and Cu were higher in park and residential soils. Assessments of soil quality showed that 97.2% of soil samples' Nemerow integrated indices were less than 1, indicating that the soils were clean. Indices of potential ecological risk for all soil samples were less than 80, indicating that they posed a slight ecological risk. Multivariate statistical analysis (correlation and principle component analyses) showed that Cu, Pb, and Hg may originate from an anthropogenic source via the painting of ancient buildings and pesticides used to protect ancient trees. Chromium may originate from natural sources via geochemical activity and soil parent material; Cr, Zn, Ni, and As were derived from mixed sources through human and geochemical activities. The receptor model was used for identification and apportionment of pollution sources of elements over the standard. The contribution rates of sources were as follows: source 2(46.1%), source 3(33.1%), source 1(17.7%), and others (3.1%) for Cd, source 1(93.0%) for Cu, source 1(52.4%), source 3(24.2%), source 2(20.0%), and others (3.4%) for Zn, source 1(56.3%), source 2(37.8%), and source 3(5.8%) for Ni. Sources 1 and 3 were anthropogenic, while source 2 was natural.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Soil pollution Controlled terms:Geochemistry - Heavy metals - Land use - Multivariant analysis - Screening - Soil quality - Soil surveys - Spatial distribution Uncontrolled terms:Anthropogenic sources - Contamination assessment - Different land use types - Heavy metal concentration - Identification and apportionments - Multivariate statistical analysis - Potential ecological risk - Principle component analysis Classification code:403 Urban and Regional Planning and Development - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 802.3 Chemical Operations - 921 Mathematics - 922 Statistical Methods Numerical data indexing:Percentage 1.77e+01%, Percentage 2.00e+01%, Percentage 2.42e+01%, Percentage 3.10e+00%, Percentage 3.31e+01%, Percentage 3.40e+00%, Percentage 3.78e+01%, Percentage 4.61e+01%, Percentage 5.24e+01%, Percentage 5.63e+01%, Percentage 5.80e+00%, Percentage 9.30e+01%, Percentage 9.72e+01% DOI:10.13227/j.hjkx.202004277 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517581 Title:Sources and Health Risks of Atmospheric Polychlorinated Biphenyls in an Urban/Industrial Areas, Northwest China Title of translation:我国西北工业区城市大气多氯联苯来源及健康风险 Authors:Mao, Xiao-Xuan (1); Li, Zi-Xuan (1); Song, Shi-Jie (1); Zhang, Xiao-Dong (2); Gao, Hong (1); Li, Chun-Xin (3); Huang, Tao (1); Ma, Jian-Min (2) Author affiliation:(1) Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China; (2) College of Urban and Environmental Sciences, Peking University, Beijing; 100871, China; (3) Gansu Chemical Industry Research Institute Co., Ltd., Lanzhou; 730000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5352-5361 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A passive air sampler was used to monitor the concentration and contamination profile of 18 polychlorinated biphenyls (PCBs) in the atmosphere over the urban and industrial area of Gaolan, a city in northwest China, during the non-heating and heating seasons of 2018, and the sources, pollutant transport, and the health risks of PCB exposure were analyzed and assessed using principle component analysis, trajectory modeling, and inhalation exposure modeling. The atmospheric concentration in the study area ranged from 110.2 to 429.9 pg•m^-3, and the highest average concentration was found at the industrial estate. Tetra-PCBs and penta-PCBs were the dominant homologue groups, and the percentage of tetra-PCBs increased in the heating season. Combustion and industrial thermal processes, PCB-containing electrical equipment, and the combined source of volatilization from paint, combustion, and industrial thermal processes were considered to be the main sources, and the source of combustion and industrial thermal processes contributed the largest proportion of PCBs at 40.8%. Largely, the emission of UP-PCBs would significantly influence PCB pollution in the study area. Trajectory analysis results illustrated that PCBs emitted from sources in the study area would be transmitted to Lanzhou City atmospherically; local pollution would be the main source of PCBs contamination in the study area during the non-heating season, while the atmospheric input of PCBs transmitted from the northwest region would be another source during the heating season. Health risk analysis showed that the non-cancer risk of PCBs exposure was low in all age groups; however, lifetime cancer risks exceeded 10^-6. PCBs emitted from combustion and industrial thermal processes sources would have a strong impact on resident exposure to PCBs, and adverse health effects would be caused due to long-term inhalation exposure of the inhabitants to PCBs contamination in the study area.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Organic pollutants Controlled terms:Atmospheric movements - Combustion - Diseases - Health risks - Heating - Polychlorinated biphenyls - Risk analysis - Risk assessment - Urban transportation Uncontrolled terms:Adverse health effects - Atmospheric concentration - Average concentration - Contamination profiles - Electrical equipment - Passive air sampler - Polychlorinated biphenyl (PCBs) - Principle component analysis Classification code:432 Highway Transportation - 433 Railroad Transportation - 443.1 Atmospheric Properties - 461.7 Health Care - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention - 922 Statistical Methods Numerical data indexing:Percentage 4.08e+01% DOI:10.13227/j.hjkx.202005237 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517630 Title:Metagenomic Insights into Salinity Build-up in Microbial Communities and Metabolism of Hydrolytic Bioreactor Treating High-color PDWW Title of translation:盐度渐增对水解微生物群落结构与功能的影响 Authors:Gao, Jing (1); Zhang, Shao-Hua (1); Wang, Rui (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:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5518-5526 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, to solve the problem of salinity enrichment in industrial wastewater recycling, a hydrolytic bioreactor was continuously operated to treat high-color printing and dyeing wastewater (PDWW) with salinity build-up. Nearly complete color removal was achieved even with salinity build-ups from 0.5 to 4 g•L^-1 in the influent. Pyrosequencing of 16S rRNA genes showed that the salinity build-up results in the decrease of microbial species from 882 to 631; however, the biodiversity of the bacterial community remains stable. Metagenomic analysis indicated that salinity build-up caused no obvious effect on the overall function of the bacterial community, but altered the abundance of specific decoloring genes. Proteobacteria dominated in the bioreactor, and Methanothrix and Geobacter were the dominant genera under low salinity conditions. Proteobacteria increased in abundance with salinity build-up. Desulfovibrio and Desulfococcus were the two predominant genera in the bioreactor fed with sodium sulphate salinity build-up, demonstrating opposite responses to the sodium stress. PICRUSt functional analysis showed that the relative abundance of the decolorizing enzymes SOD1 and SOD2 decreased significantly, but the relative abundance of CAT and TYR increased, ensuring the stability of the decolorizing function of the hydrolysis biological system. From the perspective of the functional genes of hydrolysis decolorization, this study explored the effect of salinity build-up on the microbial community and function of hydrolysis, providing a theoretical basis for the study of decolorization and organic matter removal mechanism of PDWW under the condition of salinity build-up.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Bacteria Controlled terms:Bioconversion - Biodiversity - Bioreactors - Color - Discoloration - Genes - Hydrolysis - Industrial water treatment - RNA - Sulfur compounds - Wastewater reclamation - Wastewater treatment Uncontrolled terms:Bacterial community - Industrial wastewaters - Metagenomic analysis - Microbial communities - Microbial species - Organic matter removal - Printing and dyeing wastewaters - Relative abundance Classification code:445.1.2 Water Treatment Techniques for Industrial Use - 452.4 Industrial Wastes Treatment and Disposal - 454 Environmental Engineering - 461.2 Biological Materials and Tissue Engineering - 461.8 Biotechnology - 741.1 Light/Optics - 802.1 Chemical Plants and Equipment - 802.2 Chemical Reactions Numerical data indexing:Mass_Density 5.00e-01kg/m3 to 4.00e+00kg/m3 DOI:10.13227/j.hjkx.202005080 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517653 Title:Biogeographic Distribution Patterns of Diatoms in Lancang River and Their Key Drivers Title of translation:澜沧江硅藻的地理分布模式与关键驱动因素 Authors:Sun, Sheng-Hao (1, 2); Chen, Juan (1, 2); Wang, Pei-Fang (1, 2); Wang, Chao (1, 2); Wang, Xun (1, 2); Miao, Ling-Zhan (1, 2); Liu, Sheng (1, 2); Yuan, Qiu-Sheng (1, 2) Author affiliation:(1) Key Laboratory of Integrated Regulation and Resource Department on Shallow Lakes, Ministry of Education, Hohai University, Nanjing; 210098, China; (2) College of Environment, Hohai University, Nanjing; 210098, China Corresponding author:Chen, Juan(chenjuanmn@hhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5458-5469 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As an important primary producer, diatoms play a key role in aquatic ecosystems. However, little is known about the geographical distribution characteristics and driving factors of diatoms in large rivers. In this study, based on a high-throughput sequencing dataset of microeukaryotes, we analyzed the diversities and community compositions of planktonic and sedimentary diatoms in the 1200 km mainstream of Lancang River, a typical large river in southwestern China. The results showed that the diversities of planktonic and sedimentary diatoms in Lancang River were higher in the upstream natural section, and the community compositions of both groups were significantly different among different river sections. Dam construction had a significant effect on the dominant genera. Variance partitioning analysis showed that dispersal limitation was a major driving factor for the distribution pattern of planktonic and sedimentary diatoms, with explanation proportions of 16.7% and 29.8%. Co-occurrence network analyses showed that the interspecific competition relationship and network connectivity of the planktonic diatom network were stronger than the sedimentary ones. The network connectivity of planktonic and sedimentary diatoms in the cascade reservoir section was higher than that of the upstream natural section. This study will help to better understand the biogeographical distribution of diatoms in large rivers and provide useful information for ecological responses of diatoms to dam construction in rivers.
© 2020, Science Press. All right reserved. Number of references:62 Main heading:Phytoplankton Controlled terms:Aquatic ecosystems - Geographical distribution - Large dataset - Rivers - Sedimentology Uncontrolled terms:Co-occurrence networks - Community composition - Distribution characteristics - Distribution patterns - Ecological response - High-throughput sequencing - Inter-specific competitions - Network connectivity Classification code:405.3 Surveying - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 481.1 Geology Numerical data indexing:Percentage 1.67e+01%, Percentage 2.98e+01%, Size 1.20e+06m DOI:10.13227/j.hjkx.202005258 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517646 Title:Sources and Control Area Division of Ozone Pollution in Cities at Prefecture Level and Above in China Title of translation:我国地级及以上城市臭氧污染来源及控制区划分 Authors:Yan, Hui (1); Zhang, Wei (1); Hou, Mo (1); Li, Yin-Song (1); Gao, Ping (1); Xia, Qing (2); Meng, Xiao-Yan (2); 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) China National Environmental Monitoring Centre, Beijing; 100012, 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 author:Fan, Li-Ya(fanly@scut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5215-5224 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the ground-level ozone concentration monitoring data in 2018, the ozone concentrations in 338 cities at the prefecture level and above were analyzed, and the TCEQ method was utilized to calculate the amount of locally generated ozone and regionally transported ozone in each city to divide the national ozone pollution control area and develop appropriate ozone pollution control measures. Correlation analysis was conducted between the amount of locally generated ozone and the daily maximum 8 h average ozone in each city to determine the main source of ozone pollution by determination coefficient (R²). The results show that 121 cities (35.8%) in China exceeded the standard in O3 concentration in 2018. The local generation of O3 in 104 cities has a great impact on the local O3 pollution, and is its main cause. In the other 234 cities, the main source of O3 pollution is regionally transported O3. Cities are classified into four categories based on their ozone concentration levels and pollution sources: cities with a nonattainment ozone situation and mainly locally generated ozone (N-L), cities with a nonattainment ozone situation and mainly regionally transported ozone (N-T), cities with a standard ozone situation and mainly locally generated ozone (S-L), and cities with a standard ozone situation and mainly regionally transported ozone (S-T). Finally, according to the proportion of four city types in each province, the whole country is divided into three types of control areas: severe, moderate, and general. N-L cities in the severe control area account for the largest proportion (20.3%) of the three types of control areas and the pollution is the highest; the proportion of the four categories of cities in the moderate control area are all medium; the general control area mainly includes S-T cities (65.4%), and the pollution is the lowest.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Pollution control Controlled terms:Air pollution - Ozone Uncontrolled terms:Control measures - Correlation analysis - Determination coefficients - Generated ozones - Ground level ozone concentration - Ozone concentration - Ozone pollution - Pollution sources Classification code:451 Air Pollution - 804 Chemical Products Generally Numerical data indexing:Percentage 2.03e+01%, Percentage 3.58e+01%, Percentage 6.54e+01%, Time 2.88e+04s DOI:10.13227/j.hjkx.202005094 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104990 Title:Chemical Characteristics of Groundwater and Material Sources Analysis in Shiqi River Basin Title of translation:石期河流域地下水化学特征及物质来源分析 Authors:Li, Xiao (1, 2); Yu, Shi (2); Li, Liang (1); Guo, Yong-Li (2) Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541006, China; (2) Key Laboratory of Karst Dynamics, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China Corresponding author:Yu, Shi(yushi@karst.ac.cnemailliliangjiaxiang@163.com)Li, Liang(liliangjiaxiang@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4021-4029 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the chemical characteristics of groundwater and material sources in a typical karst hill (valley) depression, 41 groundwater samples were systematically collected in the Shiqi River basin. The statistical analysis of the conventional ion content in the groundwater shows that pH of the groundwater in the study area is between 6.06-8.07, the total solid solubility is between 18.21 mg•L^-1and 336.28 mg•L^-1, and the charges of anions and cations in the water body are balanced. Ca²⁺, Mg²⁺, and HCO3^- are the main ions in groundwater, with concentrations of 2.61-108.7 mg•L^-1, 0.54-27.61 mg•L^-1, and 8.1-370.74 mg•L^-1, respectively. The groundwater characteristics in the study area are consistent with the high calcium and weak alkalinity characteristics of karst water. By using the Gibbs diagram, piper diagram, end-member analysis, and ion proportional coefficient, hydrochemical characteristics and material sources of groundwater were further analyzed. The results show that Ca²⁺ and Mg²⁺ are mainly controlled by the weathering of limestone and dolomite in which carbonic acid is involved. Na⁺ mainly comes from the dissolution of silicate rocks. At the same time, Ca²⁺ and Na⁺ undergo cationic exchange adsorption in the groundwater flow process. K⁺, Cl^-, and NO3^- are mainly affected by agricultural fertilizer application and domestic wastewater discharge. The hydrogen and oxygen isotope analysis of groundwater shows that atmospheric precipitation is the main recharge source of groundwater in this region, which impacts the chemical characteristics and material sources of local groundwater. The results of this study show that the geological background of groundwater is the main factor that affects its hydrochemical characteristics and material sources in areas with relatively little anthropogenic activity.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Hydrochemistry Controlled terms:Agricultural robots - Alkalinity - Carbon dioxide - Chemical analysis - Groundwater - Groundwater flow - Ion exchange - Ions - Landforms - Lime - Silicate minerals - Watersheds - Weathering Uncontrolled terms:Anthropogenic activity - Atmospheric precipitation - Cationic exchange - Chemical characteristic - Domestic wastewater - Fertilizer applications - Geological background - Hydrochemical characteristics Classification code:444.1 Surface Water - 444.2 Groundwater - 481.1 Geology - 481.2 Geochemistry - 482.2 Minerals - 801.1 Chemistry, General - 802.2 Chemical Reactions - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 1.82e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 2.61e-03kg/m3 to 1.09e-01kg/m3, Mass_Density 5.40e-04kg/m3 to 2.76e-02kg/m3, Mass_Density 8.10e-03kg/m3 to 3.71e-01kg/m3 DOI:10.13227/j.hjkx.201912261 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990470 Title:Analysis of Stable Carbon Isotope Characteristics of PM2.5 in Summer and Winter Season in Xinxiang City Title of translation:新乡市夏冬季节PM2.5稳定碳同位素特征分析 Authors:Yan, Guang-Xuan (1); Song, Xin (1); Zhang, Jing-Wen (1); Zhang, Pu-Zhen (1); Wang, Li-Peng (1); Zhang, Jia-Yu (1); Yang, Zheng (1); Cao, Zhi-Guo (1); Fan, Jing (1); Wang, Yue-Si (2, 3); Liu, Zi-Rui (2) Author affiliation:(1) Henan Key Laboratory of Environmental Pollution Control, College of Environment, Henan Normal University, Xinxiang; 453007, China; (2) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:82-89 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We study the seasonal variations of δ¹³C ratios in aerosol fine particulate matter (PM2.5) using 91 PM2.5 samples collected from Xinxiang, China, during the summer and winter in 2017. Mass concentrations of total carbon (TC), water soluble ions, and stable carbon isotope ratios (δ¹³C) were determined. The mean concentrations of TC in the summer and winter were 11.78 μg•m^-3 and 26.6 μg•m^-3, respectively. The δ¹³C ratio in the summer ranged from -27.70‰ to -25.22‰. The daily δ¹³C ratio fluctuated in the first half of the summer months (mean -26.96‰), whereas the δ¹³C ratio in the second half of the summer was relatively stable (mean -25.69‰). The number of fires in the study area during the first half of the summer was quite different to the number during the second half of the summer, meanwhile, there was a positive correlation between the Knss⁺ concentration and the TC mass concentration (R²=0.62, P<0.01). This indicates that biomass burning most likely contributed to variations in δ¹³C. During the winter there was a significant negative correlation between winter RH and the TC/PM2.5 mass ratio (R²=0.68, P<0.01), which suggests that SOA growth was dominant in the early stage of haze development, whereas the pollution period was dominated by SIA components. The ratio of δ¹³C ranged from -26.72‰ to -23.49‰, and there was a difference between the variation of the δ¹³C ratio in haze episode (when it was mainly enriched in the development stage) to that in the stage dominated by depletion.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Carbon Controlled terms:Isotopes Uncontrolled terms:Fine particulate matter (PM2.5) - Mass concentration - Mean concentrations - Negative correlation - Positive correlations - Stable carbon isotope ratio - Stable carbon isotopes - Water-soluble ions Classification code:804 Chemical Products Generally DOI:10.13227/j.hjkx.201907014 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861861 Title:Effect of Hydroxylamine on Community of ANAMMOX Sludge Title of translation:羟胺对厌氧氨氧化污泥群落的影响 Authors:Xing, Chong-Yang (1, 2); Fan, Yu-Chen (3); Chen, Xuan (3); Guo, Jin-Song (3); Shen, Yu (4); Yan, Peng (3); Fang, Fang (3); Chen, You-Peng (1, 2, 3) Author affiliation:(1) Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligence Technology, Chinese Academy of Sciences, Chongqing; 400714, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments (Ministry of Education), Chongqing University, Chongqing; 400045, China; (4) National Base of International Science and Technology Cooperation for Intelligent Manufacturing Service, Chongqing Technology and Business University, Chongqing; 400067, China Corresponding author:Chen, You-Peng(ypchen@cigit.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3365-3372 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:At present, the anaerobic ammonium oxidation (ANAMMOX) process has the advantages of high efficiency, low energy consumption, and low sludge quantity, and it therefore has broad application prospects in sewage nitrogen removal. Hydroxylamine is not only an intermediate product of ANAMMOX metabolism but also an inhibitor. However, the effect of hydroxylamine on the activity of ANAMMOX is not clear. Therefore, we investigated the ANAMMOX activity under the condition of adding different concentrations of hydroxylamine (40-80 mg•L^-1) through a hydroxylamine batch experiment. It was found that hydroxylamine can inhibit ANAMMOX activity. However, it was impossible to determine the threshold of ANAMMOX bacteria to hydroxylamine. Next, the mRNA levels of hydrazine oxidase (HZO) in different reactors were detected by real-time fluorescent quantitative polymerase chain reaction (RT-qPCR), and it was found that the expression levels of HZO peak and then decrease with an increase of hydroxylamine concentration. It was suggested that the tolerated hydroxylamine concentration was within 60-70 mg•L^-1 for 3.12 g•L^-1 ANAMMOX granular sludge. Moreover, a 16S rRNA high-throughput sequencing method was used to analyze the structure and function of ANAMMOX granules in microbial communities in the reactor. It was found that the addition of an appropriate concentration of hydroxylamine (50 mg•L^-1) helped to enhance the cellular motility of bacteria and promoted the composition of ANAMMOX bacteria, providing a better ecological balance.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Nitrogen removal Controlled terms:Amines - Bacteria - Energy utilization - Polymerase chain reaction - RNA - Sewage - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Ecological balance - High-throughput sequencing - Intermediate product - Low energy consumption - Microbial communities - Quantitative polymerase chain reaction - Real-time fluorescent Classification code:452.1 Sewage - 452.4 Industrial Wastes Treatment and Disposal - 461.2 Biological Materials and Tissue Engineering - 525.3 Energy Utilization - 801.2 Biochemistry - 804.1 Organic Compounds Numerical data indexing:Mass_Density 3.12e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e-02kg/m3 to 8.00e-02kg/m3, Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 6.00e-02kg/m3 to 7.00e-02kg/m3 DOI:10.13227/j.hjkx.201911244 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256424 Title:Impact of Spatial Heterogeneity of Precipitation on the Area Change in Critical Source Area of Non-point Sources Pollution Title of translation:降水空间异质性对非点源关键源区识别面积变化的影响 Authors:Gao, Xiao-Xi (1); Zuo, De-Peng (1); Ma, Guang-Wen (2); Xu, Zong-Xue (1); Hu, Xiao-Hong (1); Li, Pei-Jun (1) Author affiliation:(1) Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (2) State Environment Protection Key Laboratory of Environmental Monitoring Quality Control, China National Environmental Monitoring Centre, Beijing; 100012, China Corresponding author:Zuo, De-Peng(dpzuo@bnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4564-4571 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Aiming at non-point sources pollution in the agricultural areas with large topographic fluctuations and spatial differences in precipitation, a SWAT model was used to evaluate the spatial variations in the critical source areas (CSAs) of total nitrogen (TN) and total phosphorus (TP) under two precipitation scenarios, i.e., heterogeneous precipitation and uniform precipitation. A change in the CSAs identified based on the two precipitation scenarios during the study period were statistically calculated, and the relationship between the CSAs and precipitation variables was discussed. The study results showed that when the total precipitation was the same, the variation tendency of the identified CSAs for TN and TP under the two precipitation scenarios were similar, and very close for a few years. According to the results of the pair t test, the CSAs of TP were not affected by the spatial variation of precipitation, while the change in CSAs for TN was more significant under different precipitation scenarios, which is likely due to the difference in the physical properties of nitrogen and phosphorus. The correlation analysis between the CSAs of TN and TP with precipitation variables showed that the variation in the CSAs of TP was positively correlated with the precipitation variables in the same year, while the variation in the CSAs of TN was strongly related to the precipitation variables of the previous year. The results obtained in this study are of great significance for further exploring the impact of uncertainty of precipitation, which is an important driving factor, on the CSAs of non-point sources pollution and the governance of agricultural non-point sources pollution.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Pollution Controlled terms:Agricultural robots - Agriculture - Nitrogen - Phosphorus Uncontrolled terms:Correlation analysis - Critical source areas - Heterogeneous precipitation - Nitrogen and phosphorus - Non-point sources pollutions - Spatial differences - Spatial heterogeneity - Variation tendencies Classification code:804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202002036 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256297 Title:Distribution Characteristics and Risk Assessment of PPCPs in Surface Water and Aquatic Organisms in Chaoshan Coastal Area along the South China Sea Title of translation:潮汕地区入海河流及水生生物中PPCPs分布特征及风险评估 Authors:Xiu, Cuo (1); Wang, Chen-Chen (2, 3); Lü, Yong-Long (2, 3); Lu, Yi-Feng (1); Wang, Cong (2, 3); Zhang, Meng (2, 3); Cao, Xian-Hui (2, 3) Author affiliation:(1) School of Ecology and Environmental Science, Yunnan University, Kunming; 650504, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Lü, Yong-Long(yllu@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4514-4524 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the occurrence, distribution, and potential risks of pharmaceuticals and personal care products (PPCPs) in the South costal area of China, a total of 20 PPCPs in water and aquatic organisms (fish, crab, and shellfish), obtained from 7 coastal rivers of the Chaoshan area, were determined using solid-phase extraction (SPE) and high performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS). The results showed that up to 16 to 18 kinds of PPCPs could be detected in the rivers and aquatic organisms of the Chaoshan area, and the concentrations of PPCPs in the rivers and organisms ranged from 0.30-2 223 ng•L^-1 to 0.143-80.3 ng•g^-1, respectively, with a high detection rate for many pollutants. Significant differences were observed in the samples of water and organisms. The total concentration of PPCPs in the rivers of the Chaoshan area was in the order of Huanggang River>Lianjiang River>Huangjiang River>Longjiang River>Luohe River>Rongjiang River> Hanjiang River, with the dominance of sulfamethoxazole (SMX) and caffeine (CAF). The total concentrations of PPCPs in the aquatic organisms from the Huanggang River, Hanjiang River, Lianjiang River, and Luohe River were higher than the concentrations of PPCPs in the aquatic organisms from the Longjiang River and Rongjiang River, with a dominance of trimethoprim (TMP), SMX, and CAF. The total concentration of PPCPs in fish was significantly higher than that in crab and shellfish. The results of bioconcentration factor (BCF) showed that a variety of PPCPs were accumulated in the organisms from the Chaoshan rivers; among them, the BCF value in fish was higher, which was more likely to bioaccumulate than crabs and shellfish. The ecological risks in terms of risk quotient (RQ) for 12 typical PPCPs were assessed in the Chaoshan area. It was discovered that the risk for fleas and algae was significantly higher than that for fish. The RQ values of SMX, erythromycin (ERY), and sulfadiazine (SDZ) were all greater than 1, which posed potential ecological risks for algae in the Huanggang River and Lianjiang Rivers and for fleas in the Huangjiang River.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:River pollution Controlled terms:Algae - Fish - Fish products - High performance liquid chromatography - Mass spectrometry - Phase separation - Risk assessment - Rivers - Room and pillar mining - Shellfish Uncontrolled terms:Bioconcentration factor - Distribution characteristics - High detection rate - High-performance liquid chromatography tandem mass spectrometries - Pharmaceuticals and personal care products - Potential ecological risk - Solid-phase extraction - Sulfamethoxazole (SMX) Classification code:453 Water Pollution - 461.9 Biology - 502.1 Mine and Quarry Operations - 641.1 Thermodynamics - 801 Chemistry - 822.3 Food Products - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 3.00e-10kg/m3 to 2.22e-06kg/m3 DOI:10.13227/j.hjkx.202001203 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106082 Title:Microplastics-Induced Shifts of Diversity and Abundance of Antibiotic Resistance Genes in River Water Title of translation:微塑料对河水抗生素抗性基因的影响 Authors:Zhou, Xin-Yuan (1, 2); Wang, Yan-Zi (1, 2); Su, Jian-Qiang (1, 2); Huang, Fu-Yi (1, 2) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Huang, Fu-Yi(fyhuang@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4076-4080 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Microplastics (MPs) and antibiotic resistance genes (ARGs) are both considered emerging contaminants of increasing concern because their combined pollution poses a serious risk to the ecological environment and human health. In this study, high-throughput quantitative PCR techniques were used to investigate the diversity and abundance of ARGs in river water, to which two different microplastics (PVC and PVA) were added for aerated incubation. The results showed that ARGs in river water were diverse, and microplastics could induce more types of ARGs. Although the number and abundance of ARGs decreased in all three treatments, which were cultivated for 14 d by aeration, compared to those in non-treated samples, the total abundance of ARGs in treatments aerated with MPs were higher than those aerated without MPs, especially in the samples treated with water-soluble microplastics (PVA). Significant correlations between the abundance of ARGs and mobile genetic elements (MGEs) were observed, implying that the occurrence of MGEs may potentially affect the transmission and distribution of ARGs through horizontal gene transfer (HGT) in river water.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Water treatment Controlled terms:Antibiotics - Gene transfer - Genes - Health risks - Microplastic - Polymerase chain reaction - River pollution - Rivers Uncontrolled terms:Antibiotic resistance genes - Combined pollutions - Ecological environments - Emerging contaminant - Genetic elements - Horizontal gene transfer - Quantitative PCR - Transmission and distribution Classification code:445.1 Water Treatment Techniques - 453 Water Pollution - 461 Bioengineering and Biology - 801.2 Biochemistry DOI:10.13227/j.hjkx.202003146 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008857 Title:Adaptability of Nitrifying Biofilm Systems to Low Temperature: MBBR and IFAS Title of translation:硝化生物膜系统对低温的适应特性: MBBR和IFAS Authors:Li, Ren (1, 2); Yu, Li-Fang (1, 3); Zhang, Xing-Xiu (1); Dai, Zi-Cheng (1); Hua, Si-Si (1); Peng, Dang-Cong (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; (3) Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China Corresponding author:Yu, Li-Fang(yulifang@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3691-3698 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The long-term effects of a decreasing temperature on the nitrification performance, biofilm characteristics, and nitrifier community in a moving-bed biofilm reactor (MBBR) and integrated fixed-film activated sludge (IFAS) system were investigated at various temperatures (20, 15, and 10℃) to explore the adaptability of nitrifying biofilm systems to low temperatures. During the experiment, the extracellular polymeric substances (EPS) in the biofilms increased with decreasing temperature, which resulted in an increased biofilm mass and thickness. As there was only a biofilm phase in the MBBR to remove ammonia, the part of the carriers in the MBBR at 10℃ became plugged, which partially led to a deterioration in the effluent water quality. This indicated that the IFAS system was more adaptable to low temperatures than was the MBBR. Meanwhile, the results for the nitrifier activities showed that, although the nitrification contribution rate of the suspended phase in the IFAS system always dominated during the experiment, that of the fixed phase with regards to the ammonia uptake rate (AUR) gradually increased from 30.72% at 20℃ to 39. 85% at 10℃. This indicated that the biofilm played an enhanced role in nitrification in the IFAS system. Moreover, the qPCR results revealed that the nitrifier copies of the number of biofilms increased slightly with decreased temperature, and coincided with an increase in biomass, which partially compensated for the decreased nitrification activity. These findings provide a theoretical basis for the application of the biofilm systems to wastewater treatment.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Nitrification Controlled terms:Ammonia - Biofilms - Deterioration - Effluents - Polymerase chain reaction - Temperature - Wastewater treatment - Water quality Uncontrolled terms:Contribution rate - Extracellular polymeric substances - Integrated fixed-film activated sludge - Long-term effects - Moving bed biofilm reactors - Nitrification activity - Nitrification performance - Nitrifying biofilms Classification code:445.2 Water Analysis - 452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 462.5 Biomaterials (including synthetics) - 641.1 Thermodynamics - 801.2 Biochemistry - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 3.07e+01%, Percentage 8.50e+01% DOI:10.13227/j.hjkx.201911234 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990496 Title:Pollution Characteristics and Potential Source Contributions of Gaseous Elemental Mercury (GEM) During Summer and Autumn in Ningbo City Title of translation:夏秋季宁波市气态元素汞(GEM)污染特征及潜在源区贡献分析 Authors:Yi, Hui (1, 2, 3, 4); Lin, Jia-Mei (1, 2, 3, 4); Cai, Qiu-Liang (1, 2, 3, 4); Wang, Ke-Qiang (1, 2, 3, 4); Chen, Jin-Sheng (1, 3); Tong, Lei (1, 3, 4); Li, Jian-Rong (1, 4); Xiao, Hang (1, 3, 4) Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Excellence in Regional Atmospheric Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (4) Ningbo Urban Environment Observation and Research Station, Chinese Academy of Sciences, Ningbo; 315800, China Corresponding author:Xiao, Hang(hxiao@iue.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:65-74 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Gaseous elemental mercury (GEM) is commonly known as a hazardous heavy metal in the atmosphere and is harmful to living organisms. GEM is chemically stable and has a long residence time in the atmosphere; hence, it can be transported over long distances with air masses and is regarded as a global pollutant. We study the transportation and transformation mechanisms of GEM and its potential anthropogenic and natural contribution sources. GEM, conventional atmospheric pollutants, and meteorological parameters were monitored at a coastal site in Ningbo during the summer and autumn of 2017. The results were as follows. ① The concentrations of GEM ranged from 0.97-10.95 ng•m^-3 and the mean and standard deviation (SD) were (2.32±0.90) ng•m^-3, whereby the mean summer concentration was lower than the mean autumn concentration. ② The diurnal variations of GEM, ozone (O3), and gaseous oxidized mercury (GOM) during summer/autumn and sunny/rainy days suggest that higher levels of O3 and that strong solar radiation accounted for the rapid photochemical oxidation of GEM. The intensity of oxidation on sunny days was higher than that on rainy days. ③ Correlation analysis showed that GEM was significantly positively correlated with PM2.5 (R=0.65, P<0.01), PM10 (R=0.47, P<0.01), NO2 (R=0.46, P<0.01), and CO (R=0.57, P<0.01). Local and regional sources of GEM were mainly related to fossil fuel combustion. ④ The photochemical oxidation rate of GEM was influenced by the concentrations of oxidants (e.g., O3), gas-particle partitioning between GEM and particles, and light extinction effects of PM2.5, water vapor, and NO2. ⑤ Potential source contribution analysis (PSCF) indicated that the northwestern Zhejiang Province (including Ningbo City), the southern Anhui Province, and most of Jiangxi Province constitute a triangular area that is a potential source contribution to NBUEORS atmospheric GEM pollution during the summer. Local, regional, and long-range sources all had strong impacts on GEM pollution. During the autumn, the potential sources were mainly in the northern Zhejiang Province, and the source was smaller than that during the summer. GEM pollution during the autumn was mainly influenced by local and regional sources. Therefore, the control of atmospheric GEM pollution in the Yangtze River delta should apply inter-regional prevention and comprehensive control strategies in order to reduce atmospheric mercury pollution.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:River pollution Controlled terms:Biology - Diffusers (optical) - Fossil fuels - Heavy metals - Light extinction - Nitrogen oxides - Oxidation - Pollution control Uncontrolled terms:Gas-particle partitioning - Gaseous elemental mercury - Gaseous oxidized mercuries - Hazardous heavy metals - Mean and standard deviations - Meteorological parameters - Photochemical oxidation - Transformation mechanisms Classification code:453 Water Pollution - 461.9 Biology - 531 Metallurgy and Metallography - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201906027 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008855 Title:Spatial and Temporal Variation of Phytoplankton Community Structure and Its Influencing Factors in Shanghai River Channels Title of translation:上海河道浮游植物群落结构时空变化特征及影响因素分析 Authors:Xu, Zhi (1); Chen, Xiao-Hua (2); Shen, Gen-Xiang (2); Zhu, Ying (2); Qian, Xiao-Yong (2); Zhang, Xin-Liang (2); Zhang, Wei (1); Hu, Shuang-Qing (2); Bai, Yu-Jie (2) Author affiliation:(1) School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China Corresponding author:Shen, Gen-Xiang(shengx@saes.sh.cnemailwzhang@ecust.edu.cn)Zhang, Wei(wzhang@ecust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3621-3628 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the spatial and temporal characteristics of the phytoplankton community structure and its influencing factors in Shanghai rivers, the water quality and phytoplankton community structure at 44 river channel sites in a central urban area, new town area, and rural area in Shanghai were investigated from September to October 2018 (autumn) and July to August 2019 (summer). The results showed that: ① Chlorophyta was the dominant phyla during the autumn and summer, and was followed by Cyanobacteria and Bacillariophyta. Cyanobacteria dominated the phytoplankton community in terms of density. The number of species and density of phytoplankton were 24% and 2.77 times higher, respectively, than those during the summer and autumn. The dominance of Microcystis sp. was obvious during the autumn (Y=0.16), but there was no absolute dominant species during the summer. ② The difference in the number of phytoplankton species among the three regions was not significant, and the density of the total phytoplankton and cyanobacteria species showed a similar spatial pattern: rural area>new town area>central urban area. Additionally, no significant difference was observed in the total phytoplankton and Cyanobacteria density among the three regions during the autumn (P>0.05), whereas it was 1.82 and 1.93 times higher, respectively, in the rural area in comparison to the central urban area during the summer (P<0.05). Montecarlo test results revealed that the main factors affecting the phytoplankton community structure during the autumn were secchi disk transparency (SD), total phosphorus (TP), total nitrogen (TN), and turbidimetry (Turb), whereas these were TN, Turb, SD, and pH during the summer. ③ The results of a redundancy analysis (RDA) indicated that during the autumn, the phytoplankton in the rivers of the new town area were mainly affected by Turb, TN, and TP, while the rural rivers were mainly affected by SD. During the summer, the phytoplankton in the rivers of the new town and rural areas were mainly affected by TN and Turb. The influencing factors in the central urban area were complex.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Rural areas Controlled terms:Phytoplankton - Rivers - Urban growth - Water quality Uncontrolled terms:Dominant species - Number of species - Phytoplankton community - Phytoplankton species - Redundancy analysis (RDA) - Spatial and temporal variation - Temporal characteristics - Total phosphorus Classification code:403.1 Urban Planning and Development - 445.2 Water Analysis - 471 Marine Science and Oceanography Numerical data indexing:Percentage 2.40e+01% DOI:10.13227/j.hjkx.202001186 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104913 Title:Diversity of Soil Eukaryotic Microbes in Different Succession Stages in Maolan Karst Forest of Guizhou Title of translation:贵州茂兰喀斯特森林不同演替下土壤真核微生物多样性 Authors:Wang, Xian (1); Long, Jian (1); Li, Juan (2); Liu, Ling-Fei (1); Liao, Hong-Kai (1); Li, Yi-Rong (1); Yang, Rui (1) Author affiliation:(1) Guizhou Provincial Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environmen, Guizhou Normal University, Guiyang; 550001, China; (2) School of Geography and Environmental Science, Guizhou Normal University, Guiyang; 550001, China Corresponding author:Long, Jian(longjian22@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4314-4321 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As an indispensable part of the Maolan karst forest soil microorganisms, eukaryotic microbes play an important role in ecosystem material and energy flow. To investigate the composition and diversity of soil eukaryotic microbial communities under different succession stages in the Maolan karst forest, we explored the diversity and composition of soil eukaryotic microbes under four succession stages of primary forests (YSL), shrub forests (GML), bushes (GMC), and grassland (CD) via high-throughput sequencing (HTS) of the 18S rDNA. The results showed that the composition of soil eukaryotic microbial communities was similar in different succession stages under different classification levels. There was a significant difference in α diversity, Shannon, and Simpson's indices at different stages of succession as follows: YSL>GMC>GML>CD. The non-metric multidimensional scaling analysis showed that there were differences in the soil eukaryotic microbial community structure at different succession stages. The linear discriminant analysis effect size (LEfSe) analysis showed that the number of differential indicator species in YSL was higher than in GML, GML, and CD. The results of our study provide a theoretical basis for further research on soil eukaryotic microorganisms in different succession stages.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Forestry Controlled terms:Bacteria - Discriminant analysis - Landforms - Soils Uncontrolled terms:Eukaryotic microorganisms - High-throughput sequencing - Indicator species - Linear discriminant analysis - Material and energy flows - Microbial communities - Microbial community structures - Non-metric multidimensional scaling Classification code:481.1 Geology - 483.1 Soils and Soil Mechanics - 922 Statistical Methods DOI:10.13227/j.hjkx.202001010 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517582 Title:Dynamic Assessment of PM2.5 Health Damage Value in China from 2015 to 2018 Title of translation:2015~2018年我国PM2.5健康损害价值的动态评估 Authors:Li, Hui-Juan (1, 2); Zhou, De-Qun (2); Wei, Yong-Jie (3) Author affiliation:(1) School of Finance, Xuzhou University of Technology, Xuzhou; 221111, China; (2) College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing; 211106, China; (3) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5225-5235 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:With the development of industrialization and urbanization in China, there are many environmental problems especially air pollution, which has serious impacts on the sustainable development of economy, ecological environment and public health. Since 2013, a series of environmental protection laws and regulations, and industrial and energy policies have been successively implemented, including Action Plan for Air Pollution Control, and Three-Year Action Plan to Win the Blue Sky Defense War etc. The air quality of the whole country has been improved. In order to evaluate the dynamic changes of environmental health benefits from air pollution control in China, this paper estimates the health effects and health economic losses caused by PM2.5 pollution, and makes a comparative analysis among different regions and cities based on the data of 297 cities at prefecture level and above in China from 2015 to 2018. The results show that, due to sharp decline of ρ(PM2.5), the population exposed to ρ(PM2.5)>35 μg•m^-3decreased year by year, and the proportion of the total population decreased from 80.88% to 62.32%. The total number of all kinds of health endpoints decreased from 33.23 million to 15.91 million, health economic loss decreased from 1 579.04 billion yuan to 838.42 billion yuan, the proportion of healthy economic loss in GDP dropped from 2.31% to 0.99%. Among the six regions, the index values of Beijing, Tianjin, Hebei, and surrounding areas, and Chengyu areas have declined year by year. However, Fenwei Plain areas, Yangtze River Delta areas, Pearl River Delta areas, and the middle reaches of the Yangtze River show a complex trend of increasing in some years and decreasing later. However, the situation of Fenwei Plain is still more serious than other areas, and the ρ(PM2.5) is next to Beijing, Tianjin, Hebei and surrounding areas. ρ(PM2.5) of all 11 cities still exceed 35 μg•m^-3 in 2018. Compared with 2015, the number of early deaths decreased by 1500, but the total number of all kinds of health endpoints increased by 18 900. The health economic loss is 80.711 billion yuan, an increase of 10.714 billion yuan than that in 2015. The proportion of health economic loss in GDP is 3.16%, which is 0.25% lower than that in 2015. The per capita health economic loss is 182.67 yuan higher than that in 2015. In terms of cities, from 2015 to 2018, ρ(PM2.5) in 228 cities decreased with varying degrees. Among which, Dezhou and Baoding dropped the most, only 10 cities saw ρ(PM2.5) rise. 14 cities saw an increase in the number of healthy endpoints, and 11 cities saw an increase in the proportion of healthy economic loss to GDP. Although the index values of Baoding, Xingtai, Handan, and other cities have declined year by year, they still rank top 10 every year. The index value of Xi'an, Xianyang, Linfen, and other cities in 2018 is more than that in 2015. The research shows that the environmental health benefits of air pollution control are significant in China, but it is still necessary to further strengthen regional joint prevention and control, as well as one city one policy.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Air pollution control Controlled terms:Air quality - Damage detection - Economic and social effects - Environmental protection - Environmental regulations - Laws and legislation - Losses - Population statistics - Public health - River pollution - Rivers - Sustainable development Uncontrolled terms:Comparative analysis - Dynamic assessment - Ecological environments - Environmental health - Environmental problems - Laws and regulations - Prevention and controls - Yangtze river delta Classification code:451.2 Air Pollution Control - 453 Water Pollution - 454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 911.2 Industrial Economics - 971 Social Sciences Numerical data indexing:Percentage 2.31e+00% to 9.90e-01%, Percentage 2.50e-01%, Percentage 3.16e+00%, Percentage 8.09e+01% to 6.23e+01% DOI:10.13227/j.hjkx.202004112 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106158 Title:Adsorption of Sb(Ⅴ) in Water by Natural Pyrite: Performance and Mechanism Title of translation:天然黄铁矿吸附去除水中Sb(Ⅴ):性能与机制 Authors:Shi, Song (1); Wu, Qian-Yuan (2); Li, Xin-Zheng (2); Huang, Man-Hong (1) Author affiliation:(1) State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua University, Shenzhen; 518055, China Corresponding author:Huang, Man-Hong(huangmanhong@dhu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4124-4132 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The adsorption performance of three iron ores (pyrite, hematite, and magnetite) on Sb(Ⅴ) was compared and pyrite was shown to exhibit the highest adsorption performance. The effects of particle size, concentration, and pH on the adsorption performance were investigated with pyrite as the absorbent. The rejection of Sb(Ⅴ) was the highest (>80%) when pyrite (particle size <0.074 mm) was used as the absorbent with a concentration of 1 g•L^-1 and pH=7. The ion competition experiment indicated that PO4^3- can inhibit the adsorption of Sb(Ⅴ), while SO4^2- and CO3^2- have no significant effects on the adsorption of Sb(Ⅴ) because PO4^3- can compete with Sb(Ⅴ) for active adsorption sites on the surface of pyrite. The results also showed that the quasi-second-order kinetic model and Langmuir model can better simulate the adsorption process, which shows a single-layer adsorption behavior and chemisorption plays a main role in the rejection of Sb(Ⅴ). FTIR analysis suggested that the removal of Sb(Ⅴ) by pyrite was a coordinated ion exchange reaction. EDS and XPS results further confirmed that Sb(Ⅴ) was adsorbed on the surface of pyrite and was not reduced to Sb(Ⅲ), which is more toxic.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Adsorption Controlled terms:Absorption - Coordination reactions - Hematite - Ion exchange - Magnetite - Particle size - Particle size analysis - Pyrites Uncontrolled terms:Active adsorption - Adsorption behavior - Adsorption performance - Adsorption process - FTIR analysis - Ion exchange reactions - Langmuir models - Second order kinetics Classification code:482.2 Minerals - 802.2 Chemical Reactions - 802.3 Chemical Operations - 951 Materials Science Numerical data indexing:Mass_Density 1.00e+00kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.202001115 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658203 Title:Spatio-temporal Variation of PM2.5 Related Relationships in China from the Perspective of Air Pollution Regional Linkage Control and Prevention Title of translation:大气污染联合治理分区视角下的中国PM2.5关联关系时空变异特征分析 Authors:Yang, Wen-Tao (1, 2); Huang, Hui-Kun (1, 3); Wei, Dong-Sheng (4); Zhao, Bin (3); Peng, Huan-Hua (2) Author affiliation:(1) Department of Geographical Information Science, Hunan University of Science and Technology, Xiangtan; 411201, China; (2) National-Local Joint Engineering Laboratory of Geo-Spatial Information Technology, Hunan University of Science and Technology, Xiangtan; 411201, China; (3) Department of Geological Engineering, Central South University, Changsha; 410000, China; (4) Department of Surveying and Mapping Engineering, Central South University of Forest and Technology, Changsha; 410000, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2066-2074 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Identification of spatio-temporal variation of PM2.5 related relationships under joint management zones is of great significance for scientifically conducting joint control of air pollution in China. Based on the PM2.5 concentration data of 334 prefecture-level cities in China from 2000 to 2016, from the perspective of air pollution regional linkage control and prevention, this paper systematically analyzes the spatio-temporal variation of PM2.5 related relationships in China using a spatial unit aggregation strategy and geographically and temporally weighted regression. The results show that: ① With PM2.5 as the primary pollutant, ten air pollution joint management areas are obtained by considering the degree of pollution, geographical location, meteorology, topography, and economy. ② Geographically and temporally weighted regression can effectively reveal the spatio-temporal non-stationarity of the relationships between PM2.5 concentration and related factors. Meanwhile, population size, secondary industry gross domestic product, SO2 emissions, annual average temperature, annual precipitation, and annual relative humidity are identified as having a significant effect on changes in PM2.5 concentration. ③ The population impacts on PM2.5 concentration in the Beijing-Tianjin-Yunmeng region are the largest of all regions during the period. The influence of the secondary industry's gross domestic product on the PM2.5 concentration in the Sichuan-Yunnan District is the most variable. Apart from these values in the northeast of China, the regression coefficient values of SO2 emissions first decrease with time, then increase, and then decrease again. The time variability of the average annual temperature of each treatment area to PM2.5 is small. The influences of annual precipitation and annual average relative humidity on PM2.5 present different variability characteristics in each region.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Air pollution control Controlled terms:Air pollution - Population statistics - Topography Uncontrolled terms:Aggregation strategy - Air pollution in chinas - Annual relative humidity - Control and prevention - Geographical locations - Gross domestic products - Regression coefficient - Spatio-temporal variation Classification code:451 Air Pollution - 451.2 Air Pollution Control - 951 Materials Science DOI:10.13227/j.hjkx.201908125 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371309 Title:Source Profiles and Impact of Volatile Organic Compounds in the Coating Manufacturing Industry Title of translation:涂料制造行业挥发性有机物排放成分谱及影响 Authors:Wu, Jian (1); Gao, Song (2); Chen, Xi (3); Yang, Yong (2); Fu, Qing-Yan (2); Che, Xiang (2); Jiao, Zheng (1) Author affiliation:(1) School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China; (2) Shanghai Environmental Monitoring Center, Shanghai; 200235, China; (3) Shanghai Chemical Environmental Monitoring Station, Shanghai; 200042, China Corresponding author:Gao, Song(njulegao@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1582-1588 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:SUMMA canisters were used to collect the exhaust gas from eight coating manufacturers in East China. A total of 106 VOCs was determined by gas chromatography-mass spectrometry (GC-MS) method to identify the emission characteristics of volatile organic compounds (VOCs) and the contribution of VOCs emitted by various companies to ozone generation, and the source profiles of solvent-based and water-based coatings were established. The results show that the characteristic components of VOCs in the coating manufacturing industry are mainly aromatic hydrocarbons and oxygenated hydrocarbons. The concentration ranges from 65.5% to 99.9%. The VOC emissions of solvent-based coatings were mainly aromatic hydrocarbons, accounting for 63.0%-94.0% of total VOCs; VOC emissions from waterborne coatings were mainly composed of oxygenated hydrocarbons, accounting for 54.5% to 99.9% of the total VOCs. m,p-xylene (32.4%), ethylbenzene (19.0%), and ethyl acetate (12.1%) were solvent-based coating sources, and ethyl acetate (83.7%) and 2-butyl ketone (8.0%) were the sources of waterborne coating emissions. Aromatic hydrocarbons and oxygenated hydrocarbons are the main active components in the coating manufacturing industry, with a total contribution to the ozone generation potential (OFP) ranging from 92.9% to 99.9%. Source reactivity (SR) analysis showed that the VOCs per unit mass of water-based coatings contributed much less to the formation of ozone than solvent-based coatings, so water-based coatings significantly reduced the potential for ozone generation. Studies have shown that for VOC pollution control in the coating manufacturing industry, attention should be paid to the VOCs that contribute more to the ozone-forming potential of aromatic hydrocarbons and oxygenated hydrocarbons, and VOC emissions should be controlled from the source.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Coatings Controlled terms:Aromatic hydrocarbons - Aromatization - Gas chromatography - Ketones - Manufacture - Mass spectrometry - Mineral oils - Organic solvents - Ozone - Pollution control - Volatile organic compounds Uncontrolled terms:Emission characteristics - Gas chromatography-mass spectrometry methods - Manufacturing industries - Oxygenated hydrocarbon - Ozone formation potentials - Ozone-forming potential - Solvent-based coatings - Source profiles Classification code:513.3 Petroleum Products - 537.1 Heat Treatment Processes - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.1 Organic Compounds - 813.2 Coating Materials Numerical data indexing:Percentage 1.21e+01%, Percentage 1.90e+01%, Percentage 3.24e+01%, Percentage 5.45e+01% to 9.99e+01%, Percentage 6.30e+01% to 9.40e+01%, Percentage 6.55e+01% to 9.99e+01%, Percentage 8.00e+00%, Percentage 8.37e+01%, Percentage 9.29e+01% to 9.99e+01% DOI:10.13227/j.hjkx.201908203 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517591 Title:Formation Mechanism and Source Analysis of Two Heavy Pollution Periods in Winter in a Central Plains City Title of translation:中原城市冬季两次重污染形成机制及来源 Authors:Jia, Jia (1); Cong, Yi (1); Gao, Qing-Min (1); Wang, Ling-Ling (2); Yang, Jing-Jing (3); Zhang, Guo-Hui (1) Author affiliation:(1) School of Management Engineering, Zhengzhou University of Aeronautics, Zhengzhou; 450046, China; (2) Department of Ecology and Environment of Henan Province, Zhengzhou; 450046, China; (3) Information Management Department, Zhengzhou University of Aeronautics, Zhengzhou; 450046, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5256-5266 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To reveal the process and cause of air pollution in winter in Zhengzhou, Zhengfangji Station was selected as the sampling point to discuss the concentration of air pollutants and the characteristics of meteorological parameters in December 2019, in Zhengzhou. The concentration changes in PM2.5 water-soluble ions, elements, and carbon components in different pollution stages were compared, and air quality model simulation results were used to analyze emissions from pollution sources and regional transmission during sampling of the PM2.5 mass concentration at the sampling point. The results showed that there was a slight difference in the process of formation and dissipation of the first and second heavy pollution occurrences, showing the characteristics of "slow accumulation, slow removal" and "slow accumulation, fast removal", respectively. The mass concentration of NO3^-, SO4^2-, and NH4⁺ accounted for 41.5% and 46.2% of PM2.5, and the OC/EC ratios were 4.0 and 4.5 in the first and second heavy pollution periods, respectively. The formation of secondary aerosol particles was the main reason for the formation of heavy pollution. During the sampling period, the average contributions of local, eastern, southern, western, and northern regions to the PM2.5 concentration of the sampling point were 58.0%, 2.4%, 6.7%, 6.9%, and 12.7%, respectively. The first heavy pollution period was the result of combined locally sourced pollutant emission and externally sourced regional transmission, during which the contribution from western and southern regions and external industrial sources increased. The second heavy pollution period was mainly affected by the accumulation of local air pollutants, during which the contribution of traffic, dust, and coal-fired sources increased sharply, and the impact of external areas on the PM2.5 concentration of sampling point decreased.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Water pollution Controlled terms:Air quality - Coal dust - Industrial emissions - Transmissions Uncontrolled terms:Air quality modeling - Concentration change - Formation mechanism - Mass concentration - Meteorological parameters - PM2.5 concentration - Pollutant emission - Secondary aerosols Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 453 Water Pollution - 602.2 Mechanical Transmissions Numerical data indexing:Percentage 1.27e+01%, Percentage 2.40e+00%, Percentage 4.15e+01%, Percentage 4.62e+01%, Percentage 5.80e+01%, Percentage 6.70e+00%, Percentage 6.90e+00% DOI:10.13227/j.hjkx.202003323 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861957 Title:Concentrations of Typical Perfluoroalkyl Acids and Contributions of Their Precursors in the Water of the Le'an River in China Title of translation:乐安河河流水体典型全氟化合物的浓度及其前体物的污染贡献 Authors:Zhang, Hui (1); Wang, Shi-Liang (1); Yu, Yang (2) Author affiliation:(1) School of Geography and Tourism, Qufu Normal University, Rizhao; 276826, China; (2) China Institute of Water Resources and Hydropower Research, Beijing; 100038, China Corresponding author:Wang, Shi-Liang(wangshiliang@tsinghua.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3204-3211 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Transformation of perfluoroalkyl substance (PFASs) precursors and their contribution to PFASs pollution have become a subject of great research interest. The concentration of PFASs and their precursors and the transformation of precursors in the water samples collected from Le'an River and the effluents of sewage treatment plants (STPs) were investigated based on methods including hydroxyl radical (•OH) oxidation, extraction by solid phase, and ultra-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The results of the study revealed that the PFAS concentrations were in the range of 14.89-40.84 ng•L^-1and 58.63-114.87 ng•L^-1, and averaged 28.76 ng•L^-1 and 86.75 ng•L^-1 in the water of the Le'an River and the STP effluents, respectively. The compound with the highest concentration for the two kinds of waterbodies was perfluorooctanesulfonic acid (PFOS). The PFAS concentrations showed obvious spatial differences in the water of the Le'an River. After the oxidation treatment, the PFAS concentrations clearly increased in the two kinds of waterbodies. The increased concentrations of short-chain perfluorocarboxylic acids with carbon atom numbers of 4-8 ∑Δ[PFCAC4-C8]oxidation conversion were higher than those of compounds with long carbon chains. However, the increased concentrations of PFCAs for the STP effluents were higher than those for the river water. The transformation ratio obtained from the increased concentration of PFCAs led by the oxidation treatment against the PFCA concentration before oxidation (ΔPFCAoxidation conversion/PFCAbefore oxidation) was lower for the STP effluents than those for the water of Le'an River, which might be induced by the precursors' degradation during the sewage treatment process.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Effluents Controlled terms:Carbon - Drug products - Liquid chromatography - Mass spectrometry - Oxidation - River pollution - Rivers - Sewage treatment plants Uncontrolled terms:Oxidation treatments - Perfluoroalkyl acids - Perfluoroalkyl substances - Perfluorocarboxylic acid - Sewage treatment process - Spatial differences - Transformation ratio - Ultra performance liquid chromatography Classification code:452.2 Sewage Treatment - 452.3 Industrial Wastes - 453 Water Pollution - 801 Chemistry - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Mass_Density 2.88e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 5.86e-08kg/m3 to 1.15e-07kg/m3, Mass_Density 8.68e-08kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201911121 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517645 Title:Winter Pollution Characteristics and Physicochemical Properties of PM2.5 in a Northwest Industrial City Title of translation:西北工业城市冬季PM2.5污染特征及理化性质 Authors:Yang, Yan-Ping (1, 2, 3, 4); Chen, Qiang (1); Wang, Li-Na (4); Yang, Li-Li (1, 4) Author affiliation:(1) Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, College of Atmospheric Sciences, Lanzhou University, Lanzhou; 730000, China; (2) Northwest Institute of Eco-environmental Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Gansu Environmental Monitoring Center, Lanzhou; 730000, China Corresponding author:Chen, Qiang(18193351805@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5267-5275 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study winter pollution characteristics and physicochemical properties of PM2.5 in a northwest industrial city, for example, Baiyin in Gansu Province, we used related instruments, such as single particle aerosol mass spectrometry to conduct real-time online PM2.5 chemical composition observations, compared with Lanzhou in the same period. The results showed that, during the observation, PM2.5 concentrations (44.89 μg•m^-3) in Baiyin were significantly lower than the same period in Lanzhou (70.69 μg•m^-3). However, the proportion of particles containing heavy metals (7.84%) was significantly higher than that of Lanzhou (2.92%), the chemical composition was complex, and PM2.5 was mainly contributed by particles with larger particle sizes. The particle size distribution range of Cu, Pb, and Zn particles in Baiyin was relatively wide, the number of Cu and Zn particles was higher, and the mixing ratio of particles was higher than in Lanzhou. The main pollution source was automobile exhaust 30.91% and a secondary inorganic source was 13.00%. The pollution event on January 4, 2020 was mainly caused by the increased contributions of automobile exhaust and secondary inorganic sources, and the poor meteorological diffusion conditions in the early stage. The control of PM2.5 pollution in Baiyin in winter should be dominated by emission reduction of automobile exhaust and secondary inorganic sources, and control of heavy metal pollution in the atmosphere should be strengthened.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Physicochemical properties Controlled terms:Automobiles - Emission control - Fiber optic sensors - Heavy metals - Mass spectrometry - Particle size - Particle size analysis - Zinc Uncontrolled terms:Aerosol mass spectrometry - Automobile exhaust - Chemical compositions - Emission reduction - Heavy metal pollution - Larger particle sizes - PM2.5 concentration - Pollution sources Classification code:451.2 Air Pollution Control - 531 Metallurgy and Metallography - 546.3 Zinc and Alloys - 662.1 Automobiles - 741.1.2 Fiber Optics - 801 Chemistry - 951 Materials Science Numerical data indexing:Percentage 1.30e+01%, Percentage 2.92e+00%, Percentage 3.09e+01%, Percentage 7.84e+00% DOI:10.13227/j.hjkx.202002136 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517742 Title:Pollution Characteristics and Assessment of Heavy Metals in Atmospheric Deposition in Core Urban Areas, Chongqing Title of translation:重庆主城大气降尘中重金属污染特征及评价 Authors:Zhang, Xia (1); Liu, Bin (1); Xiao, Bo-Lin (1); Wang, Jia (1); Wan, Da (1) Author affiliation:(1) College of Environment and Ecology, Chongqing University, Chongqing; 400044, China Corresponding author:Bin, Liu(liubinworld@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5288-5294 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Pollution characteristics and risk of heavy metals in atmospheric deposition in core urban areas of Chongqing were investigated for one year from December 2017 to November 2018.Six functional zones: suburb, education area, residential area, commercial area, transportation hub, and industrial-residential area in Chongqing were selected for monthly atmospheric deposition collection. Concentrations of Cd, Cr, Ni, and Pb were analyzed using AAS. The potential ecological risk index and geoaccumulation index were used to evaluate the heavy metals pollution. Results show that the concentrations of Cd, Cr, Ni, and Pb in the atmospheric deposition were 1.59, 72.68, 20.99, and 101.17 mg•kg^-1, respectively, and their annual deposition fluxes were 0.39, 8.04, 2.41, and 10.41 mg•(m²•a)^-1, respectively. Concentrations of heavy metals in autumn were significantly higher than those in the other three seasons, especially for Cd, and their deposition fluxes in winter were lowest. The potential ecological risk index of Cd was biggest, achieving a very high ecological hazard level, while the ecological risk of Cd and Pb in industrial-residential area was highest, and that of Cr and Ni, respectively, were highest in transportation hub and residential area. The geoaccumulation index indicated that the pollution of Cd was the highest, and that of Cr, Ni, and Pb was very low. The pollution in industrial-residential area and transportation hub was high, while that in the suburb was relatively low.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Air pollution Controlled terms:Atmospheric chemistry - Deposition - Heavy metals - Housing - Meteorological problems - Urban transportation Uncontrolled terms:Atmospheric depositions - Deposition fluxes - Ecological hazards - Functional zones - Geo-accumulation index - Heavy metals pollution - Potential ecological risk - Residential areas Classification code:403.1 Urban Planning and Development - 432 Highway Transportation - 433 Railroad Transportation - 443.1 Atmospheric Properties - 451 Air Pollution - 531 Metallurgy and Metallography - 802.3 Chemical Operations DOI:10.13227/j.hjkx.202001142 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796118 Title:Toxicity of Soil Leachate from Coal Gangue and Its Surrounding Village of Barley(Hordeum vulgare) Title of translation:矸石山及其周边村庄土壤浸出液对大麦的毒性作用 Authors:Shang, Yu (1); Yang, Feng-Long (1); Ning, Xia (1); Dong, Yi-Ru (2); Sang, Nan (1) Author affiliation:(1) College of Environment and Resources, Shanxi University, Taiyuan; 030006, China; (2) Environmental Supervision Center of Shanxi Province, Taiyuan; 030027, China Corresponding author:Sang, Nan(sangnan@sxu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2936-2941 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Coal gangue is a harmful solid waste product of coal mining. When it accumulates for a long time, it becomes harmful to the surroundings. To investigate the adverse effect of coal gangue on the surrounding environment, this study investigated the effects of coal gangue and its downstream village on the growth toxicity and genotoxicity of barley at different dilution concentrations (1:27, 1:9, 1:3, and 1:1) via hydroponic experiments. As a result, low concentration coal gangue showed a slight promotion effect on the growth of roots and shoots of barley, while coal gangue and village soil, which have a high concentration, could seriously inhibit their germination and growth. At the same time, with the increase of the concentration of coal gangue, malondialdehyde (MDA) in barley leaves increased, and chlorophyll (Chl) increased first and then decreased, while the village soil showed a lower toxic effect. In addition, our results showed that higher concentrations of coal gangue and village soil could decrease the mitotic index and increase the micronucleus rate in root tip cells, indicating that the toxicity mechanism of coal gangue to barley may be involved in genotoxicity. These results provide experimental evidence for the ecological risk assessment of the coal gangue and its surrounding environment.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Coal industry Controlled terms:Coal - Coal tailings - Risk assessment - Rural areas - Soils - Toxicity Uncontrolled terms:Ecological risk assessment - Experimental evidence - Hydroponic experiments - Low concentrations - Micronucleus rate - Promotion effects - Surrounding environment - Toxicity mechanisms Classification code:461.7 Health Care - 483.1 Soils and Soil Mechanics - 524 Solid Fuels - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201910133 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796316 Title:Characteristics, Source Analysis, and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) Pollution in Marine Organisms from Estuaries of Changhua River in Hainan Province Title of translation:海南省昌化江河口海域生物体中多环芳烃污染特征, 来源解析及健康风险评价 Authors:Wang, Hui-Juan (1, 2); Kuang, Ze-Xing (1, 2); Zhou, Xian (2); Qin, Xiao-Qing (2); Huang, Hong-Hui (2) Author affiliation:(1) College of Fisheries and Life Science, Shanghai Ocean University, Shanghai; 201306, China; (2) Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou; 510300, China Corresponding author:Huang, Hong-Hui(huanghh@scsfri.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2942-2950 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To assess the contamination by polycyclic aromatic hydrocarbons (PAHs) in organisms in the estuary of Changhua River in Hainan, we determined the content of 16 priority PAHs by gas chromatography and mass spectrometry (GC-MS). The composition, source, and potential edible risk of PAHs were studied. The results showed that the total PAHs of demersal fish (wet weight, same below), crustaceans, and pelagic fish were 5.52-787.98, 12.18-154.64, and 10.20-199.79 ng•g^-1, respectively, and the average contents were 83.21, 64.72, and 89.48 ng•g^-1, respectively. There were some differences in the content of PAHs in various organisms. The average content followed the order of pelagic fish>demersal fish>crustaceans. Compared with other areas in the country and abroad, the content of marine organisms'PAHs in the estuary of the Changhua River was above the medium level. The result of isomer characteristic ratio showed that the PAHs of 33 organisms mainly came from the combustion sources (petroleum combustion and biomass combustion) and petroleum sources. Moreover, demersal fish were greatly affected by combustion sources, while pelagic fish were greatly affected by petroleum sources. Human risk assessment indicated that the content of benzopyrene (BaP) was within the limits set by the European Union. Most of the organisms in the estuary of Changhua River were within the safe range of consumption, but the long-term consumption of these seafoods may pose a potential health risk (1.0×10^-5≤ILCR<1.0×10^-4).
© 2020, Science Press. All right reserved. Number of references:39 Main heading:River pollution Controlled terms:Barium compounds - Combustion - Estuaries - Fish - Gas chromatography - Gasoline - Health risks - Marine biology - Marine pollution - Mass spectrometry - Mineral oils - Polycyclic aromatic hydrocarbons - Risk assessment - Rivers Uncontrolled terms:Biomass combustion - Characteristic ratio - Combustion sources - Human risk assessment - Marine organisms - Petroleum combustion - Polycyclic aromatic hydrocarbons (PAHS) - Potential health risks Classification code:407.2 Waterways - 453 Water Pollution - 461.7 Health Care - 461.9 Biology - 513.3 Petroleum Products - 523 Liquid Fuels - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201911094 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796199 Title:Response of Extracellular Enzyme Activities to Substrate Availability in Paddy Soil with Long-term Fertilizer Management Title of translation:长期施肥稻田土壤胞外酶活性对底物可利用性的响应特征 Authors:Ning, Yu-Fei (1, 2); Wei, Liang (1, 2); Wei, Xiao-Meng (1, 2); Zhu, Zhen-Ke (1); Yuan, Hong-Zhao (1); Ge, Ti-Da (1); Wu, Jin-Shui (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:Zhu, Zhen-Ke(zhuzhenke@isa.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2852-2860 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The availability of carbon (C), nitrogen (N), and other substrates in soil determines the growth and metabolism of microorganisms and affects the activity of extracellular enzymes. To study the activities of β-1, 4-glucosidase (BG) and β-1, 4-N-acetylglucosaminidase (NAG) in response to C and N availability, samples that underwent four treatments-non-fertilization (CK), chemical fertilizer (NPK), combination of organic manure and chemical fertilizer (OM), and mixture of straw and chemical fertilizer (ST)-were collected from long-term fertilization paddy soil and incubated for 0, 4, 8, and 12 months to obtain soil with different C and N availability gradients. The results showed that the dissolved organic carbon(DOC) content of OM and ST treatment samples was 2-3 times higher than that of CK and NPK treatment samples. With the increase of DOC and ammonium (NH4⁺-N) contents, the activities of BG and NAG and the contents of microbial biomass C (MBC) and N (MBN) showed no increase during incubation within each treatment. Fertilization treatments, incubation time, and their interaction are crucial factors varying the contents of DOC, NH4⁺-N, MBC, and MBN among different fertilization treatments (P<0.01). There was a positive correlation between MBC/MBN and DOC/NH4⁺-N of OM treatment (P<0.05) and a negative relationship between ln(BG)/ln(NAG) and DOC/NH4⁺-N of ST treatment (P<0.01), indicating that the availability of substrates played a key role in the potential activity of extracellular enzymes in paddy soil, and the carbon-nitrogen ratio of microbial biomass was controlled by the C/N stoichiometry of substrates in soil. The results have a certain guiding significance for further study on the variation of extracellular enzyme activity in paddy soil, regulating the balance of carbon and nitrogen, and improving the fertility of paddy soil.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Fertilizers Controlled terms:Enzyme activity - Organic carbon - Soils - Substrates Uncontrolled terms:Carbon-nitrogen ratio - Dissolved organic carbon - Extracellular enzyme activity - Extracellular enzymes - Fertilizer management - Guiding significances - Long-term fertilization - Substrate availabilities Classification code:461.9 Biology - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201909140 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796228 Title:Response of Aggregate Distribution to Input Straw and Their Linkages to Organic Carbon Mineralization in Soils Developed from Five Different Parent Materials Title of translation:不同母质发育土壤团聚体分布对外源输入秸秆的响应及其与有机碳矿化的关系 Authors:Mao, Xia-Li (1); Qiu, Zhi-Teng (1); Zhang, Shuang (1); Shen, Qian (1); Zhang, Ming-Kui (1) Author affiliation:(1) School of Environmental and Resource Sciences, Zhejiang University, Hangzhou; 310058, China Corresponding author:Zhang, Ming-Kui(mkzhang@zju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2842-2851 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Development and the dynamics of stable aggregates in many soils are known to be closely related to the cycling as well as accumulation of soil organic carbon (SOC). This study explored the aggregation processes and distributions of soil organic carbon in soils developed from limestone (L), quaternary red earth (Q), granite (G), basalt (B), and tertiary red sandstone (T) subtropical China related to the addition of maize residues during 7 days and 184 days of incubation. The soils were sieved to<0.25 mm before incubation. We aimed to clarify the mechanisms underlying SOC mineralization across soils from the perspective of soil aggregate protection. Fractionation of the water stable aggregates showed that addition of maize straw promoted the formation of>2 mm and 2-1 mm aggregates, while only 1.0-0.5, 0.5-0.25 and <0.25 mm aggregates were detected in the absence maize straw. The proportion of macroaggregates as well as their stability was always higher in L, Q, and B developed soils than those in G and T developed soils. In amended soils, the accumulation of total SOC was much obvious in L, Q, and B developed soils than those in G and T developed soils, and these increases were mainly contributed by the >0.25 mm macroaggregate-associated SOC. This result indicated that>0.25 mm macroaggregates were important spots for SOC sequestration. Furthermore, the proportions of>0.25 mm macroaggregate-associated SOC were also significantly (P<0.05) higher in L, Q, and B developed soils than those in G and T developed soils, and the free light organic carbon (fLOC) followed an inverse parent material pattern as>0.25 mm macroaggregate-associated SOC. Results also demonstrated that ratios of accumulative mineralized CO2-C to total soil organic carbon in L, Q, and B soils were significantly (P<0.05) lower than those in G and T soils. The correlation analysis further suggested that ratios of cumulative respired CO2-C to total soil organic carbon were significantly and positively correlated (P<0.01) with the proportion of fLOC, but inversely correlated (P<0.01) with the proportion of>0.25 mm macroaggregate-associated SOC. By applying ¹³C-NMR to characterize the inherent chemical composition of soil organic carbon fractions, we noted that fLOC was more deeply decomposed than intra-aggregate light organic carbon (intra-aggregate LOC), and both the fractions were advanced decomposed in G and T developed soils, verifying enhanced protection of added maize residues inside soil aggregates. The findings of the research suggested that the parent material exerts a significant influence on SOC mineralization by controlling the formation of aggregates and location of SOC in the hierarchical structure of the soil aggregate system. We demonstrated that enhanced physical protection of SOC by forming more stable macroaggregates contributes to carbon accumulation in limestone, quaternary red earth, and basalt developed soils treated with organic amendments.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Soils Controlled terms:Aggregates - Basalt - Carbon dioxide - Geochemistry - Lime - Limestone - Mineralogy - Organic carbon Uncontrolled terms:Aggregate distribution - Aggregation process - Carbon mineralization - Chemical composition of soils - Correlation analysis - Hierarchical structures - Physical protection - Water stable aggregates Classification code:406 Highway Engineering - 481.2 Geochemistry - 482 Mineralogy - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 804.2 Inorganic Compounds Numerical data indexing:Age 1.92e-02yr, Age 5.04e-01yr, Size 2.00e-03m to 1.00e-03m DOI:10.13227/j.hjkx.201912222 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796368 Title:Effect of Free Hydroxylamine on the Activity of Two Typical Nitrite-oxidizing Bacteria Title of translation:游离羟胺对两种典型亚硝态氮氧化菌活性的影响 Authors:Shen, Chen (1); Zhang, Shu-Jun (2); Peng, Yong-Zhen (1) Author affiliation:(1) National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing; 100124, China; (2) Research and Development Center of Beijing Drainage Group Corporation, Beijing; 100022, China Corresponding author:Peng, Yong-Zhen(pyz@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2805-2811 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The sludge from enrichment of Nitrobacter and Nitrospira was used as a research object and batch tests were performed. The inhibitory effects of hydroxylamine on Nitrobacter and Nitrospira under the same pH and different hydroxylamine concentration gradients, the same hydroxylamine concentration, and different pH gradients were investigated. The results showed that under the same pH condition, the activity of Nitrobacter decreased with increasing hydroxylamine concentration. Under the same hydroxylamine concentration (HA=5 mg•L^-1) at a higher pH environment (pH ≥ 7.5), hydroxylamine produced more free hydroxylamine (FHA) and the inhibitory effect on Nitrobacter was improved. At a low pH environment (pH≤7), ionic hydroxylamine promoted the activity of Nitrobacter. The inhibitory effect of hydroxylamine on Nitrospira was limited. When pH=7.5 and hydroxylamine concentration was 45 mg•L^-1, the relative activity of Nitrospira was 82%. The NOB growth rate kinetics model and the non-substrate inhibition linear equation were used to describe the effect of FHA on Nitrobacter and Nitrospira activity. The coefficient of determination R² was 0.90 and 0.94, respectively. FHA may be the main reason for inhibiting the activity of Nitrobacter and Nitrospira.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:pH effects Controlled terms:Amines - Bacteria - Growth kinetics - Growth rate Uncontrolled terms:Coefficient of determination - Concentration gradients - Inhibitory effect - Nitrite-oxidizing bacteria - pH environments - Relative activities - Research object - Substrate inhibition Classification code:801.1 Chemistry, General - 804.1 Organic Compounds Numerical data indexing:Mass_Density 4.50e-02kg/m3 to 2.20e-02kg/m3, Percentage 8.20e+01% DOI:10.13227/j.hjkx.201911110 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861806 Title:Analysis of Rainwater Runoff Pollution Characteristics of Various Typical Underlying Surfaces in Ningbo Title of translation:宁波市典型城市下垫面雨水径流污染特征解析 Authors:Xu, Yu-Jie (1); Gong, Yue-Min (2); Bi, Jun-Peng (1); Wang, Yang (1); Cheng, Jun-Rui (1); Wang, Kan (1) Author affiliation:(1) School of Civil and Environmental Engineering, Ningbo University, Ningbo; 315211, China; (2) College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou; 310014, China Corresponding author:Cheng, Jun-Rui(chengjunrui@nbu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3275-3284 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The pollution of rainwater runoff in urban areas can cause nutrient enrichment and eutrophication in receiving waters. To explore the pollution characteristics of rainwater runoff in Ningbo, eight sampling campaigns were carried out during rainfall events from 2009 to 2019. Samples of rainwater runoff were collected from underlying surfaces of roofs, squares, grassland, main roads, and the roads in commercial streets and residential districts. The concentrations of runoff pollutants, their sources and correlations, and first flush effects were studied using frequency statistical analysis and correlation analysis. The average event mean concentrations of the chemical oxygen demand (COD), ammonia nitrogen, total nitrogen, total phosphorus, and total suspended solids (TSS) in the rainwater runoff in Ningbo were in the ranges of 23.88-102.31, 0.40-1.69, 3.41-8.71, 0.09-0.50, and 37.6-323.4 mg•L^-1, respectively. Apart from the square surfaces, the COD and total nitrogen pollution of the underlying surfaces was severe. The ammonia nitrogen concentrations from the roof, commercial street, and residential district surfaces were significantly higher (P<0.05) than those from the square, grassland, and main road surfaces. The concentrations of total phosphorus from the commercial street, main road, and grassland surfaces were significantly higher (P<0.05) than those of the other underlying surfaces. The correlations of TSS with COD, ammonia nitrogen, and total phosphorus showed that the pollutants and TSS have the same original sources in roof, square, main road, and commercial street runoff, while ammonia nitrogen and total nitrogen have the same original sources in runoff from grassland and residential areas. Under the meteorological conditions of light and moderate rain, the first flush effects of ammonia nitrogen in the runoff of roofs and grassland were observed clearly, whereas this was not the same for the pollutants of total nitrogen and total phosphorus in the residential area, main road, and square runoff.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Water pollution Controlled terms:Ammonia - Chemical oxygen demand - Eutrophication - Housing - Nitrogen - Phosphorus - Rain - Roads and streets - Roofs - Runoff - Water pollution control Uncontrolled terms:Correlation analysis - Event mean concentrations - First flush effect - Meteorological condition - Nutrient enrichments - Residential districts - Sampling campaigns - Total suspended solids Classification code:403.1 Urban Planning and Development - 406.2 Roads and Streets - 442.1 Flood Control - 443.3 Precipitation - 453 Water Pollution - 453.2 Water Pollution Control - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Mass_Density 3.76e-02kg/m3 to 3.23e-01kg/m3 DOI:10.13227/j.hjkx.201911060 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861781 Title:Analysis of Hydrogen and Oxygen Stable Isotope Characteristics and Vapor Sources of Precipitation in the Guanzhong Plain Title of translation:关中平原降水氢氧稳定同位素特征及其水汽来源 Authors:Zhao, Ming-Hua (1); Lu, Yan-Wei (1); Heng, Rachana (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 Saskatchewan, Saskatoon; S7N5A8, Canada Corresponding author:Si, Bing-Cheng(bing.si@usask.ca) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3148-3156 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To improve the understanding of hydrogen and oxygen stable isotope characteristics and vapor sources in the Guanzhong Plain, we collected 98 precipitation samples and corresponding meteorological data between 2015 and 2018 in Yangling, Shanxi Province, which is located in the central area of the Guanzhong Plain. The composition characteristics of the local hydrogen and oxygen stable isotopes of precipitation (δ²H, δ¹⁸O, and δ¹⁷O) and their environmental controls were analyzed, and the local meteoric water line (LMWL) and the meteoric water line of the triple oxygen isotopes were established. Three indicators (δ¹⁸O, d-excess, and ¹⁷O-excess) were used to explore the possible vapor sources of local precipitation and to quantify the contributions of ocean-source and inland-source water vapor to the precipitation. The results showed that there were obvious seasonal changes in the hydrogen and oxygen stable isotopes of precipitation in the Yangling area: water isotopes were depleted in the wet season (May to October) and enriched in the dry season (November to April of the next year). Both the slope (7.7) and intercept (9.1) of the LMWL were lower than those of the global meteoric water line (GMWL), indicating that the annual precipitation in the research area experienced variable degrees of secondary evaporation under cloud cover. The slope of the meteoric water line of the triple oxygen isotopes is 0.528, which is between that of seawater equilibrium fractionation (0.529) and water vapor diffusion into dry air (0.518), consistent with the fact that the Guanzhong area is located on the migration path of marine air mass to inland arid regions. Comprehensive analysis of δ¹⁸O, d-excess, and ¹⁷O-excess confirmed that the precipitation in the study area is jointly contributed to by the warm and humid air mass from the southeast monsoon and the dry and cold air mass from the westerly wind. Of these, approximately 55%-79% of the precipitation water vapor comes from the ocean, mainly in June to August, and about 21%-45% of the water vapor comes from inland and local evaporation, mainly from October to April. The water vapor sources of precipitation in May and September are complex and may intermittently originate from ocean and inland water vapor.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Water vapor Controlled terms:Evaporation - Hydrogen - Isotopes - Oxygen - Precipitation (meteorology) - Water piping systems Uncontrolled terms:Composition characteristics - Comprehensive analysis - Environmental control - Equilibrium fractionations - Hydrogen and oxygen stable isotopes - Precipitation samples - Triple oxygen isotopes - Water vapor diffusion Classification code:443.3 Precipitation - 446.1 Water Supply Systems - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 2.10e+01% to 4.50e+01%, Percentage 5.50e+01% to 7.90e+01% DOI:10.13227/j.hjkx.201911063 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861960 Title:Interannual Characteristics of Fine Particulate Matter in North China and Its Relationship with Land Use and Land Cover Change Title of translation:华北地区大气细颗粒物(PM2.5)年际变化及其对土地利用/覆被变化的响应 Authors:Yang, Wei (1); Jiang, Xiao-Li (2) Author affiliation:(1) School of Geographical Science, Taiyuan Normal University, Jinzhong; 030619, China; (2) Institute of Urban and District Development, Taiyuan Normal University, Jinzhong; 030619, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:2995-3003 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fine particulate matter (PM2.5) is an important component of air pollution, and thus it is meaningful to analyze its influencing factors. According to existing literature, most studies to date have focused on the relationship between PM2.5 and meteorological or economic factors, whereas fewer have analyzed the relationship between PM2.5 and land use and land cover change (LUCC). This study employed spatial distribution data of PM2.5 and land use and land cover data to analyze the relationship between dynamic characteristics of PM2.5 and LUCC. A geographically weighted regression (GWR) model and spatial analysis tools based on ArcGIS were used to analyze the relationship between PM2.5 dynamic characteristics and LUCC. North China was selected as the study area, and the results showed that ① The spatial pattern of PM2.5 in North China was high in the southeast and low in the northwest for 18 years. From a time perspective, the PM2.5 reached its maximum value in 2006 and has maintained a high value since then. The PM2.5 exceeded the permissible standard in most of the cities, with serious environmental pollution generally. ② The main land use and land cover types in North China from 2000 to 2015 were cropland, woodland, and grassland, and the land use and land cover change showed a trend of great decline in cropland and a great increase in construction land. ③ The results of the GWR model showed that local R² is low in non-LUCC areas and high in LUCC areas, and the PM2.5 dynamic characteristics have a significant response to LUCC. ④ For different land use and land cover types, the distribution of PM2.5 showed a trend of construction land>cropland>water area>grassland>woodland>unused land, for different types of LUCC. PM2.5 concentration increased when natural land changed to artificial land and decreased when artificial land changed to natural land.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Land use Controlled terms:Particles (particulate matter) - Pollution Uncontrolled terms:Dynamic characteristics - Environmental pollutions - Fine particulate matter - Fine particulate matter (PM2.5) - Geographically weighted regression models - Land use and land cover - Land use and land cover change - Spatial analysis tools Classification code:403 Urban and Regional Planning and Development - 951 Materials Science Numerical data indexing:Age 1.80e+01yr DOI:10.13227/j.hjkx.201911079 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861890 Title:Greenhouse Gas Emissions for Typical Open-Field Vegetable Production in China Title of translation:我国典型露地蔬菜生产中的温室气体排放 Authors:Zhang, Fen (1); Cheng, Tai-Hong (1); Chen, Xin-Ping (1); Wang, Xiao-Zhong (1) Author affiliation:(1) Chongqing Key Laboratory of Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Southwest University, Chongqing; 400715, China Corresponding author:Wang, Xiao-Zhong(wxz20181707@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3410-3417 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To quantify the net greenhouse gas emissions (NGHGE) of typical open-field vegetables production in China and analyze potential mitigation measures, the life cycle assessment (LCA) method was used to calculate the agricultural inputs, carbon sequestration, and greenhouse gas emissions of open-field tomato, cucumber, Chinese cabbage, and radish production in China based on national statistical data. The results showed that greenhouse gas emissions of typical vegetable production in China were much higher than the associated carbon sequestration, suggesting that they were net greenhouse gas emitters. The weighted average net greenhouse gas emissions of open-field tomato, cucumber, Chinese cabbage, and radish production when expressed on an area basis were 4 149, 3 718, 3 780, and 2 427 kg•hm^-2(CO2-eq), respectively. The results from this study also indicated significant differences in the spatial distribution of greenhouse gas emissions for open-field vegetable production in China, and open-field tomato, cucumber, Chinese cabbage, and radish had higher greenhouse gas emissions in Hainan, Yunnan, Shaanxi, and Shandong, respectively, than in the other provinces. Fertilizer production, transportation, and application were the most significant contributors to the greenhouse gas emissions, contributing 86.8%-90.8% of the total emissions. This is significant for improving industry technology during fertilizer production and optimizing fertilizer management in open-field vegetable production based on different vegetables and provinces, which could achieve a double-win strategy in terms of increasing open-field vegetable yield and minimizing greenhouse gas emissions simultaneously.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Gas emissions Controlled terms:Agricultural robots - Carbon - Fertilizers - Fruits - Greenhouse gases - Life cycle - Vegetables Uncontrolled terms:Carbon sequestration - Fertilizer management - Fertilizer production - Life Cycle Assessment (LCA) - Mitigation measures - Statistical datas - Vegetable productions - Weighted averages Classification code:451.1 Air Pollution Sources - 804 Chemical Products Generally - 821.4 Agricultural Products Numerical data indexing:Percentage 8.68e+01% to 9.08e+01% DOI:10.13227/j.hjkx.201912104 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278156 Title:Effects of Artificial Destratification and Induced-natural Mixing on Water Quality Improvement in a Drinking Water Reservoir Title of translation:人工强制混合充氧及诱导自然混合对水源水库水质改善效果分析 Authors:Wen, Cheng-Cheng (1, 2); Huang, Ting-Lin (1, 2); Li, Nan (1, 2); Zhang, Hai-Han (1, 2); Lin, Zi-Shen (1, 2); Li, Yan-Qing (1, 2); Yang, Shang-Ye (1, 2); Dong, Ya-Jun (3) Author affiliation:(1) Key Laboratory of Northwest Water Resource, Environment and Ecology, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Shaanxi Key Laboratory of Environmental Engineering, School of Environmental and Municipal 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:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1227-1235 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the effects of water quality improvement by artificial destratification and artificially-induced mixing, as well as realize the conditions of artificial mixing and natural mixing, the Lijiahe Reservoir was selected to monitor the indexes of water quality and hydrometeorology from June 2017 to April 2019 and to analyze the characteristics of variations in water temperature, dissolved oxygen, and pollutants during the natural and induced-mixing processes. The results demonstrated that: ① The natural process had the features of a long period of thermal stratification and only a short period of mixing of about 2.5 months. Through the operation of water-lifting aerators (WLAs) during the induced-mixing process, the water body was completely mixed and entered the cooling period at the end of September, achieving the conditions of induced-natural mixing. The surface water temperature and average air temperature were 20.17℃ and 16.5℃, respectively, and the water body continued to be naturally mixed after the WLA system was shut down, which led to a natural mixing cycle of 5.5 months. ② During the natural-mixing process, the concentration of pollutants was relatively high in the whole period, and the concentration of surface pollutants in the mixing stage presented a trend of increasing first and then decreasing. The oxycline appeared with thermal stratification, and the anaerobic cycle in the bottom of water column reached 6 months. ③ Compared with the natural-mixing process, the hypolimnetic anaerobic condition was eliminated and the control effects of pollutants dominated during the induced-mixing process. Simultaneously, the concentrations of NH4⁺-N, TP, Fe, and Mn in the bottom of the water column were cut by 76.2%, 75.5%, 82.2%, and 82.1%, respectively, during the same period from October to March of the following year, and met the "Environmental Quality Standards for Surface Water". This study shows that the artificially-induced mixing process contributes to water quality improvement and mixing-period prolongation.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Reservoirs (water) Controlled terms:Biochemical oxygen demand - Dissolved oxygen - Manganese removal (water treatment) - Mixing - Potable water - Surface waters - Temperature - Thermal stratification - Water aeration - Water pollution - Water quality Uncontrolled terms:Anaerobic conditions - Average air temperature - Completely-mixed - De-stratification - Environmental quality standards - Surface water temperature - Water quality improvements - Water temperatures Classification code:441.2 Reservoirs - 444 Water Resources - 444.1 Surface Water - 445.1 Water Treatment Techniques - 445.2 Water Analysis - 453 Water Pollution - 641.1 Thermodynamics - 802.3 Chemical Operations Numerical data indexing:Age 2.08e-01yr, Age 4.58e-01yr, Age 5.00e-01yr, Percentage 7.55e+01%, Percentage 7.62e+01%, Percentage 8.21e+01%, Percentage 8.22e+01% DOI:10.13227/j.hjkx.201909176 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278095 Title:Characteristics of Heavy Metal Absorption by Winter Wheat and Its Quantitative Relationship with Influencing Factors Title of translation:冬小麦吸收重金属特征及与影响因素的定量关系 Authors:Wang, Yi-Wen (1); Rui, Yu-Kui (1); Li, Zhong-Yang (2); Su, De-Chun (1) Author affiliation:(1) Beijing Key Laboratory of Farmland Pollution Prevention-control and Remediation, College of Resource and Environment Science, China Agricultural University, Beijing; 100193, China; (2) Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang; 453002, China Corresponding author:Su, De-Chun(dcsu@cau.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1482-1490 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Winter wheat is one of the main food crops in China, and ensuring the quality and safety of agricultural products is an important component in agricultural production. The absorption of heavy metals by winter wheat is affected by many factors. To clarify the characteristics of heavy metal absorption by winter wheat under field conditions, and the quantitative relationship between the content of heavy metals in wheat grains and the physical and chemical properties of soil and its content of heavy metals, point-to-point sampling was carried out from 50 fields with different levels of heavy metal pollution in the main wheat-producing areas of North China. The pH, organic matter (OM), cation exchange capacity (CEC), and contents of heavy metals in soil, wheat grain, and straw were analyzed. In addition, the characteristics of heavy metals absorbed by wheat and the effects of the physical and chemical properties of soil on the absorption of heavy metals by wheat were studied, and the quantitative relationship between heavy metals and physical and chemical properties of soil and heavy metals in wheat grain was studied by multivariate regression analysis. The results showed that the Cd content in soil in the wheat field ranged from 0.150 to 2.66 mg•kg^-1, and the Cd content of the corresponding wheat grain ranged from 0.033 to 0.39 mg•kg^-1. The range of Pb content in soil was 4.68-371 mg•kg^-1, and the corresponding wheat Pb content range was 0.27-2.4 mg•kg^-1. The soil As content range was 3.00-21.3 mg•kg^-1, and the corresponding wheat grain As content range was 0.044-0.18 mg•kg^-1. The over-standard rates of wheat Cd, Pb, and As were 55%, 100%, and 0, respectively, and those of soil Cd, Pb, and As were 52%, 13%, and 0, respectively. Soil Cd content was positively correlated with wheat grain Cd content (P<0.01), with correlation coefficient r=0.663 (n=50). There was a significant positive correlation between soil Pb content and wheat Pb content (P<0.05), with correlation coefficient r=0.348 (n=50). There was no significant correlation between soil As content and wheat As content. The mean enrichment coefficients of wheat grains on Cd, Pb, and As were 0.17, 0.027, and 0.008 9, respectively, and the mean transfer coefficients were 0.52, 0.27, and 0.22, respectively. The enrichment and transfer coefficients of heavy metals in wheat were Cd>Pb>As. The content of heavy metals in wheat straw was 2-5 times higher than that in corresponding grains. Soil pH, OM, and CEC also affect Cd content in wheat grains. Soil Cd content, soil pH, OM, CEC, and wheat grain Cd content were analyzed by multiple regression analysis, and four prediction equations of wheat grain Cd content were obtained. The correlation coefficient r reached a very significant level (P<0.01), and the correlation coefficient of the prediction equation including all variables was highest at r=0.810 (n=50), showing that it could predict the Cd content in wheat grains well.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Grain (agricultural product) Controlled terms:Agricultural robots - Crops - Forecasting - Heavy metals - Metal analysis - Multivariant analysis - pH - Regression analysis - Soils Uncontrolled terms:Absorption of heavy metals - Correlation analysis - Multiple regression analysis - Multivariate regression analysis - Physical and chemical properties - Quantitative relationship - Soil property - Wheat Classification code:483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 801.1 Chemistry, General - 821.4 Agricultural Products - 922 Statistical Methods - 922.2 Mathematical Statistics Numerical data indexing:Percentage 1.00e+02%, Percentage 1.30e+01%, Percentage 5.20e+01%, Percentage 5.50e+01% DOI:10.13227/j.hjkx.201909077 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070691 Title:Source Apportionment and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in PM2.5 in Changchun City, Autumn of 2017 Title of translation:2017年秋季长春市PM2.5中多环芳烃的污染来源及健康风险评价 Authors:Zhang, Yi-Xuan (1, 2); Cao, Fang (1, 2); Zheng, Han (1, 2); Zhang, Dong-Dong (1, 2); Zhai, Xiao-Yao (1, 2); Fan, Mei-Yi (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; 210044, China; (2) Key Laboratory of Meteorological Disaster, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Cao, Fang(caofangle@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:564-573 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, 30 PM2.5 samples were collected from the atmosphere in Changchun City in the autumn of 2017. The concentration and composition characteristics of 17 polycyclic aromatic hydrocarbons (PAHs) in the samples were analyzed by gas chromatography mass spectrometry (GC-MS). The diagnostic ratio and principal component analysis method were used to determine the source of PAHs pollution. The health risk assessment was carried out by both calculating the equivalent carcinogenic concentration of benzo(a)pyrene and the lifetime risk of cancer. Results show that the average PM2.5 concentration in autumn in Changchun is (50.84±12.23) μg•m^-3, and the content of organic carbon (OC) and elemental carbon (EC) are (17.07±5.64) μg•m^-3and (1.33±0.75) μg•m^-3, respectively, accounting for 37% of the total PM2.5. The total concentration of PAHs is (15.69±5.93) ng•m^-3, which was dominated by medium- to high-ring-number PAHs, accounting for 84.26% of total PAHs. The atmospheric PAHs in Changchun mainly originate from motor vehicle exhaust emissions (44. 48%)>coal combustion (29.16%)>biomass burning (26.36%), local transportation (gasoline vehicles) emissions being the main source of pollution. The average carcinogenic concentration of benzo(a)pyrene is in the range of 1.55 ng•m^-3 and 5.38 ng•m^-3, and the average carcinogenic equivalent concentration is (6.44±1.53) ng•m^-3, which is generally considered a slight pollution level. The ingestion of PAHs by breathing is the most harmful to the health of adult women, followed by adult males and children, however since the lifetime carcinogenic risk value of the entire population did not exceed 1×10^-6, their health risks are considered to be at acceptable levels.
© 2020, Science Press. All right reserved. Number of references:49 Main heading:Risk assessment Controlled terms:Aromatization - Coal combustion - Coal transportation - Gas chromatography - Health - Health risks - Mass spectrometry - Mineral oils - Organic carbon - Pollution - Polycyclic aromatic hydrocarbons - Pyrene Uncontrolled terms:Changchun - Composition characteristics - Equivalent concentrations - Gas chromatography-mass spectrometries (GC-MS) - PM2.5 - Polycyclic aromatic hydrocarbons (PAHS) - Principal component analysis method - Source analysis Classification code:461.6 Medicine and Pharmacology - 461.7 Health Care - 503 Mines and Mining, Coal - 513.3 Petroleum Products - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 2.64e+01%, Percentage 2.92e+01%, Percentage 3.70e+01%, Percentage 4.80e+01%, Percentage 8.43e+01% DOI:10.13227/j.hjkx.201906043 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071326 Title:Pollution Characteristics and Source Apportionment of n-Alkanes and PAHs in Summertime PM2.5 at Background Site of Yangtze River Delta Title of translation:长三角背景点夏季大气PM2.5中正构烷烃和多环芳烃的污染特征和来源解析 Authors:Xue, Guo-Yan (1); Wang, Ge-Hui (1, 2); Wu, Can (1); Xie, Yu-Ning (1); Chen, Yu-Bao (1); Li, Xing-Ru (3); Wang, Xin-Pei (1); Li, Da-Peng (1); Zhang, Si (1); Ge, Shuang-Shuang (1); Ding, Zhi-Jian (1) Author affiliation:(1) Key Laboratory of Geographic Information Science, School of Geographic Sciences, East China Normal University, Shanghai; 200241, China; (2) Institute of Eco-Chongming, Shanghai; 200062, China; (3) Analytical and Testing Center, Department of Chemistry, Capital Normal University, Beijing; 100048, China Corresponding author:Wang, Ge-Hui(ghwang@geo.ecnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:554-563 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the pollution characteristics and sources of organic aerosols at a background site of the Yangtze River Delta, day- and night- PM2.5samples were collected from May 30th to August 15th, 2018 in Chongming Island, China and measured for their normal alkanes (n-alkanes) and polycyclic aromatic hydrocarbons (PAHs) content employing a GC-MS technique. Concentrations of PM2.5, n-alkanes, and PAHs during the entire sampling period were (33±21) μg•m^-3, (26±44) ng•m^-3, and (0.76±1.0) ng•m^-3, respectively. During the entire campaign, 35% of the collected PM2.5 samples were of a particle loading larger than the first grade of the China National Air Quality Standard (35 μg•m^-3), suggesting that further mitigation with respect to air pollution in Chongming Island remains imperative. In the period with a PM2.5 concentration higher than 35 μg•m^-3, which was classified as the pollution period, concentrations of n-alkanes and PAHs were one order of magnitude higher than those in the period with PM2.5less than 15 μg•m^-3, which was classified as the clean period. During the entire campaign, OC was higher in the daytime than in the nighttime, mainly due to the daytime photooxidation that enhanced the formation of secondary organic aerosols. During the pollution period, concentrations of EC and other pollutants were higher in the nighttime than in daytime, mainly due to the transport of the inland pollutants by the nighttime land breeze. Such a diurnal difference was not observed for the pollutants in clean periods, mainly due to the relatively clean breeze from East China Sea that diluted the air pollution. Diagnostic ratios showed that 67% of n-alkanes in PM2.5 was derived from fossil fuel combustion. PMF analysis further showed that during the pollution period, vehicle exhausts and industrial emissions were the largest sources of PAHs, both accounting for 51% of the total in PM2.5. In contrast, during the clean periods ship emissions were the largest source, contributing about 45% of the total PAHs, exceeding the sum (38%) of vehicle and industrial emissions.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:River pollution Controlled terms:Aerosols - Air quality - Coal combustion - Fossil fuels - Gas chromatography - Industrial emissions - Landforms - Mass spectrometry - Mineral oils - Paraffins - Photooxidation - Polycyclic aromatic hydrocarbons - Ships Uncontrolled terms:Chongming islands - Coal-burning - n-Alkanes - PM2.5 - Polycyclic aromatic hydrocarbons (PAHS) - Ship emissions - Vehicle exhausts Classification code:451.1 Air Pollution Sources - 451.2 Air Pollution Control - 453 Water Pollution - 481.1 Geology - 513.3 Petroleum Products - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Percentage 3.50e+01%, Percentage 3.80e+01%, Percentage 4.50e+01%, Percentage 5.10e+01%, Percentage 6.70e+01% DOI:10.13227/j.hjkx.201908019 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658134 Title:Regulating Effect and Mechanism of Calcite/Chlorapatite Mixture Addition on Transformation and Transport of Phosphorus in Sediments Title of translation:方解石/氯磷灰石混合物添加对水体内源磷迁移转化的调控效应和机制 Authors:Bai, Xiao-Yun (1); Lin, Jian-Wei (1); Zhan, Yan-Hui (1); Chang, Ming-Yue (1); Wu, Jun-Lin (1); Xin, Hui-Min (1); Huang, Liang-Jun (2) Author affiliation:(1) College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai; 201306, China; (2) Eight-Sail Instrument & Equipment (Shanghai) Co., Ltd., Shanghai; 201114, China Corresponding author:Lin, Jian-Wei(jwlin@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2281-2291 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Understanding the effect of calcite and chlorapatite mixture (CA/ClAP) addition on the mobilization of phosphorus (P) in sediments is crucial to the application of CA/ClAP as an amendment material to control the release of P from sediments. To address this issue, batch experiments were conducted to investigate the removal performance of phosphate by CA/ClAP, and sediment incubation experiments were carried out to study the effect of CA/ClAP addition on the mobilization of P in sediments. The results showed that the removal ability of phosphate by CA/ClAP was much higher than those by calcite and chlorapatite, and the kinetics data of phosphate removal by CA/ClAP followed a pseudo-second-order kinetics model. Increasing calcite and chlorapatite dosages would be favorable for the removal of phosphate by CA/ClAP, and coexisting Ca²⁺ enhanced the phosphate removal. CA/ClAP addition not only reduced the concentration of soluble reactive P (SRP) in the overlying water, but also decreased the concentration of SRP in the pore water. The addition of CA/ClAP in sediments caused an increase in the content of P in the sediments, but the increased P mainly existed in the form of calcium-bound P (HCl-P), which was difficult to be re-released into the water column under anoxic and common pH (5-9) conditions. The reduction of SRP in the pore water after the addition of CA/ClAP played an important role in the prevention of sedimentary P liberation into the overlying water by the CA/ClAP amendment. The results of this work indicate that CA/ClAP can be used as an amendment material for interception of the release of P from sediments into overlying water.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Sediments Controlled terms:Calcite - Mixtures - Phosphorus - Water Uncontrolled terms:Batch experiments - Chlorapatites - Overlying water - Phosphate removal - Pseudo second order kinetics - Removal performance - Sediment incubations - Soluble reactive P Classification code:483 Soil Mechanics and Foundations - 804 Chemical Products Generally - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201908135 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658374 Title:Temporal and Spatial Occurrence of NSAIDs in Taihu Lake and Relevant Risk Assessment Title of translation:太湖水体中NSAIDs的时空分布规律和生态风险评价 Authors:Lian, Jie (1); Li, Yi-Fei (1); Wang, Xiao-Xuan (1); Ye, Bin (1); Zou, Hua (1, 2, 3); Shi, Hong-Xing (3) Author affiliation:(1) School of Environmental and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China; (3) State Key Laboratory of Nuclear Biological and Chemical Protection for Civilian, Beijing; 102205, China Corresponding author:Zou, Hua(zouhua@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2229-2238 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Non-steroidal anti-inflammatory drugs (NSAIDs) are a class of drug residues with a high frequency of detection in Taihu Lake. However, little information is available about the occurrence of typical NSAID mixtures in Taihu Lake as a whole across the four seasons. Therefore, for each season, the concentrations of five typical NSAIDs including diclofenac, ibuprofen, indomethacin, naproxen, and ketoprofen were monitored in the water of Taihu Lake by the method of high-performance liquid chromatography-mass spectrometry (HPLC-MS/MS) at 19 transects covering the entire lake. The temporal and spatial occurrence of NSAID mixtures in the water of Taihu Lake and their correlation with environmental factors were analyzed, and the mixture risk quotient (MRQ) model was also used to assess the ecological risk of the NSAID mixtures. The research results are as follows: ① The concentrations of NSAIDs in the northern, western, and eastern waters of Taihu Lake are at a higher level compared to those in the central waters. Ketoprofen is the main contributor to the contamination of NSAID mixtures in all regions of Taihu Lake. ② The concentrations of NSAIDs in Taihu Lake are higher in summer (15.9-134.3 ng•L^-1) and autumn (16.4-144.6 ng•L^-1) but lower in spring (25.3-72.5 ng•L^-1) and winter (14.6-57.4 ng•L^-1), being significantly correlated with water conductivity and pH, respectively. ③ The MRQ model evaluation reveals that there are nine sections in Taihu Lake showing a high ecological risk (MRQ>1) from NSAID mixtures throughout the year. The ecological risk of the NSAID mixtures at a medium or high level (MRQ>0.1) lasts for a long time spanning the spring, summer, and autumn seasons, of which the risk is greatest in autumn. Overall, the pollution caused by the NSAID mixtures in the water of Taihu Lake should not be ignored, and especially great attention should be paid to the pollution in autumn.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Lake pollution Controlled terms:Drug products - High performance liquid chromatography - Lakes - Mass spectrometry - Mixtures - Risk assessment - Springs (components) Uncontrolled terms:Environmental factors - High frequency HF - High performance liquid chromatography-mass spectrometries - Model evaluation - Non-steroidal anti-inflammatory drugs - Research results - Temporal and spatial - Water conductivity Classification code:453 Water Pollution - 601.2 Machine Components - 801 Chemistry - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.46e-08kg/m3 to 5.74e-08kg/m3, Mass_Density 1.59e-08kg/m3 to 1.34e-07kg/m3, Mass_Density 1.64e-08kg/m3 to 1.45e-07kg/m3, Mass_Density 2.53e-08kg/m3 to 7.25e-08kg/m3 DOI:10.13227/j.hjkx.201909233 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658196 Title:Characteristics and Sources of Microbial Aerosols in Urban and Mountainous Areas in Autumn and Winter in Xi'an, China Title of translation:西安市秋冬季市区与山区微生物气溶胶组成特征及来源 Authors:Xie, Wen-Wen (1); Lu, Rui (1); Mu, Fei-Fei (1); Qi, Yu-Zhen (1); Bai, Wen-Yan (1); Li, Yan-Peng (1, 2) Author affiliation:(1) School of Environmental Science and Engineering, Chang'an University, Xi'an; 710054, China; (2) Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education, Chang'an University, Xi'an; 710054, China Corresponding author:Li, Yan-Peng(liyanp01@chd.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2044-2049 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the bioaerosol composition characteristics and sources in urban areas and mountains, three sample sites were selected in urban (urban, suburban) and southern mountainous areas in Xi'an, and air, soil, and leaf samples were simultaneously collected. The fungi and bacteria community structures at different sampling sites were analyzed through a high-throughput sequencing method, and their spatio-temporal variations were also examined. Moreover, a source track technique was used to identify the source of microorganisms in the air. The results showed that the fungi and bacteria at different sampling sites were significantly different, indicating that the geographical location has a significant influence on the community structure of microorganisms in the air. In winter, more potential fungal pathogens and bacterial pathogens were detected in urban areas with high relative abundance and diversity. In addition, the results showed that the main local source of fungi and bacteria was the leaf surface, of which the contribution rate of bacteria in the air fine particles was up to (55±30)%. This study can provide a scientific basis for understanding the characteristics of microbial pollution in the atmosphere, and for air environment quality evaluation and disease prevention in China.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Urban growth Controlled terms:Aerosols - Bacteria - Fungi Uncontrolled terms:Bacteria community structures - Bacterial pathogens - Community structures - Composition characteristics - Geographical locations - High-throughput sequencing - Microbial pollution - Spatio-temporal variation Classification code:403.1 Urban Planning and Development DOI:10.13227/j.hjkx.201911010 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371236 Title:Phosphate Control Effect and Water Body Remediation of Magnesium Modified Reed Biochar Title of translation:镁改性芦苇生物炭控磷效果及其对水体修复 Authors:Ding, Yu-Qin (1); Li, Da-Peng (1); Zhang, Shuai (1); Chen, Li-Yuan (1); Xu, Chu-Tian (1); Chen, Shu-Tong (1); Zhu, Qi (1); Huang, Yong (1) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China Corresponding author:Li, Da-Peng(ustsldp@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1692-1699 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Adding biochar from harvested reed to sediments is a new method to control the release of sedimentary phosphorus. Three types of Mg-modified biochars were prepared by pyrolysis of reed modified by magnesium chloride at 300, 450, and 600℃.The phosphate adsorption characteristics of the three types of biochars were analyzed by isothermal adsorption experiments. Biochar MBC-450 with good phosphate adsorption effects was selected as the material for the following experiments. Taking the sediment and overlying water of a campus river as the experimental object, we studied the adsorption of phosphate in overlying water and the control of sedimentary phosphorus by Mg-modified biochar under different dosage modes (mixing and covering). The concentration of DIP in the overlying water could be effectively reduced by biochar mixing and covering, and the accumulative phosphorus adsorption capacity increased by 17.3% (mixing) and 11.7% (covering) compared with that of the control. The control effect of sedimentary phosphorus by biochar mixing was more obvious; the DIP in sedimentary water decreased by 14.7%, 18.9%, and 35.36% from 0-2 cm to 4-6 cm compared with the control. The DIP in sedimentary water decreased by 33.3%, -28.2%, and 12.9% when covered with biochar. Compared with the control, the proportion of NH4Cl-P in the sediment of 0-2 cm and 2-4 cm increased by 15% and 15% (mixing) and 12% and 2% (covering), respectively, while BD-P in TP decreased by 7% and 9% (mixing) and 6% and 3% (covering), respectively, and the Al-P in TP decreased by 7% and 6% (mixing) and 7% and -1% (covering), respectively. The other forms of phosphorus did not change significantly. Biochar mixing and covering can both improve the microbial activity in surface sediment, and biochar mixing can improve the microbial activity in deeper sediments more significantly.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Magnesium compounds Controlled terms:Adsorption - Aluminum compounds - Chlorine compounds - Mixing - Nitrogen compounds - Phosphorus - Sedimentology - Sediments - Water Uncontrolled terms:Bio chars - Isothermal adsorption - Magnesium chlorides - Microbial activities - Phosphate adsorption - Phosphate controls - Phosphorus adsorption - Reed Classification code:481.1 Geology - 483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 7.00e+00%, Percentage 9.00e+00%, Size 0.00e+00m to 2.00e-02m, Size 2.00e-02m to 4.00e-02m, Size 4.00e-02m to 6.00e-02m, Percentage -1.00e+00%, Percentage -2.82e+01%, Percentage 1.17e+01%, Percentage 1.20e+01%, Percentage 1.29e+01%, Percentage 1.47e+01%, Percentage 1.50e+01%, Percentage 1.73e+01%, Percentage 1.89e+01%, Percentage 2.00e+00%, Percentage 3.00e+00%, Percentage 3.33e+01%, Percentage 3.54e+01%, Percentage 6.00e+00% DOI:10.13227/j.hjkx.201910010 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368727 Title:Succession Pattern of Phytoplankton and Its Drivers in Lake Luoma, Jiangsu Province Title of translation:骆马湖浮游植物演替规律及驱动因子 Authors:Zhang, Qing-Ji (1, 2); Wang, Ye-Yu (3); Wang, Jin-Dong (3); Wang, Ri-Xin (1); Deng, Jian-Ming (2); Cai, Yong-Jiu (2); Peng, Kai (2); Chen, Ye (2); Gong, Zhi-Jun (2) Author affiliation:(1) School of Marine Sciences, Ningbo University, Ningbo; 315832, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Jiangsu Luoyun Hydraulic Engineering Management Division, Suqian; 223800, China Corresponding author:Wang, Ri-Xin(wrx_zjou@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1648-1656 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As a water storage lake for the South-to-North Water Diversion Project, it is crucial to examine changes in aquatic ecosystem structures in Lake Luoma, Jiangsu province. Field sampling was carried out in Lake Luoma monthly from 2014 to 2018 to study the relationship between the phytoplankton community structure and environmental factors. During the studied period, total nitrogen, permanganate index, and electrical conductivity in water column gradually increased, whereas fluoride content declined. The pattern of total phosphorus and dissolved oxygen was not distinct. A total of 71 genera of phytoplankton were identified from 2014 to 2018, and the average monthly biomass variation ranged from 0.16 to 5.51 mg•L^-1. Bacillariophyta and Chlorophyta were the dominant phyla in the four years, followed by Pyrrophyta and Cryptophyta. The dominant genera were Synedra sp., Chroomonas spp., Aulacoseira spp., Dinobryon sp., Scenedesmus spp., Fragilaria spp., Mougeotia sp., Ankistrodesmus sp., and Euglena spp. The results showed that the phytoplankton community structure significantly changed in the four years, which was mainly ascribed to the redistribution of biomass. Specifically, in addition to the dominance of Bacillariophyta and Chlorophyta, the dominance of Pyrrophyta and Cyanophyta increased during the last two years. Non-metric multidimensional scaling analysis showed that variation of the phytoplankton community in Lake Luoma was mainly related to total nitrogen, fluoride, water temperature, total phosphorus, dissolved oxygen, pH, conductivity, and permanganate index, among which the total nitrogen, water temperature, and fluoride concentration dominated the phytoplankton community change after the generalized additive model test. Water temperature is the driving factor affecting seasonal changes of the phytoplankton community. Total nitrogen and fluoride concentrations are the driving factors affecting the interannual variation in the phytoplankton community. Our study indicated that in recent years, the implementation of the ban on sand mining and demolition of the enclosed aquaculture in Lake Luoma has affected the water environment, resulting in a significant succession of the phytoplankton community.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Phytoplankton Controlled terms:Additives - Aquatic ecosystems - Biochemical oxygen demand - Dissolved oxygen - Flood control - Fluorine compounds - Lakes - Nutrients - Phosphorus - Temperature - Water supply Uncontrolled terms:Community structures - Electrical conductivity - Fluoride concentrations - Generalized additive model - Non-metric multidimensional scaling - Phytoplankton community - Shallow lakes - South-to-North water diversion project Classification code:442.1 Flood Control - 446.1 Water Supply Systems - 454.3 Ecology and Ecosystems - 471 Marine Science and Oceanography - 641.1 Thermodynamics - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.60e-04kg/m3 to 5.51e-03kg/m3 DOI:10.13227/j.hjkx.201909146 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371270 Title:PM2.5 Inversion Using Remote Sensing Data in Eastern China Based on Deep Learning Title of translation:基于深度学习的华东地区PM2.5浓度遥感反演 Authors:Liu, Lin-Yu (1); Zhang, Yong-Jun (1); Li, Yan-Sheng (1); Liu, Xin-Yi (1); Wan, Yi (1) Author affiliation:(1) School of Remote Sensing and Information Engineering, Wuhan University, Wuhan; 430079, China Corresponding author:Zhang, Yong-Jun(zhangyj@whu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1513-1519 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:PM2.5, which is a major source of air pollution, has a considerable impact on human health. In this study, a multi-element joint PM2.5 inversion method based on a deep learning model is proposed. With PM2.5concentration as the ground truth, 10 elements including the Himawari-AOD daily data products, temperature, relative humidity, and pressure, were introduced as inversion elements. To verify the effectiveness of the method, the experiment was carried out by season using remote sensing data in Eastern China during 2016-2018. The results demonstrate that PM2.5 concentrations were positively correlated with AOD, precipitation, wind speed, and high vegetation cover index and negatively correlated with dwarf vegetation cover index. The correlation with temperature, humidity, pressure, and DEM changed with seasons. Comparative experiments indicated that the accuracy of PM2.5 inversion based on the deep neural network is higher than that of traditional linear and nonlinear models. R² was above 0.5, and the error was small in each season. The R² value for autumn, which showed the best inversion, was 0.86, that for summer was 0.75, that for winter was 0.613, and that for spring was 0.566. The visualization of the model illustrates that the inversion result of the DNN model is closer to the PM2.5 concentration distribution interpolated by the ground monitoring station, and the resolution is higher and more accurate.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Deep learning Controlled terms:Deep neural networks - Remote sensing - Vegetation - Wind Uncontrolled terms:Comparative experiments - Eastern China - Himawari data - Inversion - Linear and nonlinear models - PM2.5 - PM2.5 concentration - Remote sensing data Classification code:443.1 Atmospheric Properties DOI:10.13227/j.hjkx.201909209 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105354 Title:Analysis of Characteristics of Water-soluble Ions in PM2.5 in Chengdu Based on the MARGA Title of translation:基于高分辨率MARGA分析成都市PM2.5中水溶性离子污染特征 Authors:Yin, Han-Mei (1); Chen, Jun-Hui (1); Feng, Xiao-Qiong (1); Jian, Tao (1); Qian, Jun (1); Liu, Zheng (1) Author affiliation:(1) Sichuan Academy of Environmental Sciences, Chengdu; 610041, China Corresponding author:Chen, Jun-Hui(9503062@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3889-3898 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Water-soluble ions in PM2.5 were serially on-line monitored using the MARGA sampling and measurement system in Chengdu in 2019. Pollution characteristics of water-soluble ions were analyzed using the meteorological monitoring data. The results show that variations in the concentrations of eight water-soluble ions were consistent with the variations in PM2.5 in Chengdu. The annual average mass concentration of the total water-soluble ions was (20.2±12.7) μg•m^-3, accounting for 48.6% of the PM2.5 mass, which indicates that water-soluble ions were the major components of PM2.5. The mass concentrations of all the ions were in the order of NO3^->SO4^2->NH4⁺>Cl^->Ca²⁺>K⁺>Mg²⁺>Na⁺. The annual average mass concentration of secondary ions was (20.2±12.7) μg•m^-3, accounting for 87.2% of total water-soluble ions. The concentrations of total water-soluble ions in different seasons were in the order of winter>spring≈autumn>summer. Monthly variations in total water-soluble ion concentrations followed a U-shaped curve; mass concentrations were the highest in January and December and lowest from June to August. Monthly variations in the concentrations of NO3^-, SO4^2-, NH4⁺, Cl^-, Na⁺, and K⁺ were consistent with the total water-soluble ion concentrations, while the concentrations of Ca²⁺ and Mg²⁺ were the highest in June. Visibility declined with the increase in the concentration of water-soluble ions, especially secondary water-soluble ions regardless of the rainfall. Light rain (accumulated rainfall in 24 h <10 mm) had no scavenging effect on water-soluble ions, while moderate and heavy rainfall had a significant effect. There was a significant positive correlation between NO3^-, SO4^2-, and NH4⁺ (all the correlation coefficients were over 0.7), indicating that the mechanisms of evolution of secondary water-soluble ions in the atmosphere are highly similar to each other. The annual mean values of SOR and NOR were 0.42 and 0.12, respectively, which were negatively correlated with temperature and O3 and positively correlated with humidity, indicating that the main source of SO4^2- was heterogeneous oxidation reactions in the liquid phase and the main source of NO3^- was heterogeneous oxidation reactions at night. The annual mean values of CE/AE and NR were 1.2 and 1.1, respectively, indicating that most aerosols in the study area were relatively alkaline. The atmospheric environment of Chengdu is rich in ammonia; thus, (NH4)2SO4 and NH4NO3 were the main forms of secondary ions.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Ions Controlled terms:Ammonia - Atmospheric humidity - Rain - Secondary emission - Water pollution Uncontrolled terms:Accumulated rainfall - Atmospheric environment - Correlation coefficient - Heterogeneous oxidation - Measurement system - Meteorological monitoring - Positive correlations - Water-soluble ions Classification code:443.1 Atmospheric Properties - 443.3 Precipitation - 453 Water Pollution - 804.2 Inorganic Compounds Numerical data indexing:Percentage 4.86e+01%, Percentage 8.72e+01% DOI:10.13227/j.hjkx.202003042 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106203 Title:Characteristics of Stable Isotopes and Moisture Sources of Two Typical Precipitation Events in Lanzhou City Title of translation:兰州市两场典型降水事件稳定同位素特征及其水汽来源 Authors:Han, Ting-Ting (1); Zhang, Ming-Jun (1); Wang, Sheng-Jie (1); Du, Qin-Qin (1); Ma, Zhuan-Zhuan (1); Guo, Rong (1); Cao, Yan-Feng (1) Author affiliation:(1) College of Geography and Environmental Science, Northwest Normal University, Lanzhou; 730070, China Corresponding author:Zhang, Ming-Jun(mjzhang2004@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3993-4002 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To better understand the isotope variations on a short time scale, this study focused on a long-term rainfall event with light precipitation (June 26-27) and a short-term one with heavy precipitation (July 28) in Lanzhou City in the summer of 2019. Combined with HYSPLIT model, samples collected during a continuous precipitation event every 10 min and 30 min were analyzed to explore the characteristics and mechanism of stable hydrogen and oxygen isotopes in precipitation. The results indicate that the effect of sub-cloud secondary evaporation makes the slope of the sequential meteoric water line (SMWL) smaller at the beginning of the rainfall event. Most of the continuous sampling points are distributed above the global meteoric water line (GMWL) and local meteoric water line (LMWL). Moreover, the deuterium excess is larger than the local average annual deuterium (8.13), indicating that the samples have experienced moisture recycling to a certain extent. During two consecutive days (June 26-27) of rainfall, the variations in oxygen isotope δ¹⁸O did not follow the effect of precipitation amount; the precipitation δ¹⁸O of the first day was "L" shaped, and it fluctuated the next day. On July 28, δ¹⁸O steadily decreased, and the range of δ¹⁸O exceeded 9‰. On June 26, the moisture transport path was short at the height of 500 m and on June 27 local evaporation was the main pathway. On July 28, with a relatively stable air mass, the moisture source of the entire precipitation event did not change significantly, neither did the isotope value. Therefore, for a single precipitation event on a short time scale, the difference in moisture sources is one of the reasons for isotope variations.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Moisture Controlled terms:Deuterium - Evaporation - Oxygen - Rain - Water piping systems Uncontrolled terms:Characteristics and mechanisms - Continuous precipitation - Continuous sampling - Heavy precipitation - Meteoric water lines - Moisture transport - Precipitation events - Stable hydrogen and oxygen isotopes Classification code:443.3 Precipitation - 446.1 Water Supply Systems - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Size 5.00e+02m, Time 1.80e+03s, Time 6.00e+02s DOI:10.13227/j.hjkx.201912142 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990460 Title:Vertical Pollution Characteristics and Sources of Polycyclic Aromatic Hydrocarbons in a Heterogeneous Unsaturated Zone Under a Coking Plant Title of translation:某焦化场地非均质包气带中多环芳烃(PAHs)来源及垂向分布特征 Authors:Meng, Xiang-Shuai (1, 2); Wu, Meng-Meng (1); Chen, Hong-Han (1); Yue, Xi (2); Tao, Shu-Yuan (3) Author affiliation:(1) School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing; 100083, China; (2) CERI Eco Technology Co., Ltd., Beijing; 100053, China; (3) Beijing Shougang Construction Investment Co., Ltd., Beijing; 100041, China Corresponding author:Chen, Hong-Han(chenhh56@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:377-384 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Six deep sampling boreholes are used for studying the sources and vertical distribution of 16 polycyclic aromatic hydrocarbons (PAHs) in an abandoned coking plant. The maximum depth of soil sampling ranged from 9.5-42 m. The present study analyzes the distribution characteristics and sources of PAHs in addition to the important factors affecting migration of PAHs in the unsaturated zone. Results showed that the maximum values of total PAHs range of 134.79-11 266.81 mg•kg^-1 at vertical depths ranging from 1-5 m. We found that 2+3 rings dominated total PAHs and that the highest content was Nap. Results also showed that the main source of PAH pollution was coal combustion. Coal tar pitch and different oils from deep processing of tar played an important role in PAH pollution. The gravel layer served as a good infiltration channel for pollutants, and the sand lens below 20 m depth became the main enrichment layer for PAHs through adsorption and interception. Oils and wastewater from discharge and leaching of chemicals contributed to the migration of PAHs through inter-miscibility and competitive adsorption, which led to deep soil pollution. Soil layers above 1 m depth were affected by artificial disturbance, rainfall leaching, and degradation, and the unsaturated zone below 30 m depth was affected by leaching from groundwater. Consequently, the ratio of low to high rings first increased before decreasing with increased depth of the unsaturated zone. The types of pollution sources, rock particle sizes, organic matter content, and hydrogeological conditions all affected the vertical distribution and migration of PAHs.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Polycyclic aromatic hydrocarbons Controlled terms:Coal combustion - Coal tar - Coking - Groundwater - Hydrogeology - Importance sampling - Leaching - Mineral oils - Soil pollution - Soils Uncontrolled terms:Competitive adsorption - Distribution characteristics - Hydrogeological conditions - Organic matter content - Pollution sources - Polycyclic aromatic hydrocarbons (PAHS) - Unsaturated zone - Vertical distributions Classification code:411.2 Coal Tar - 444.2 Groundwater - 481.1 Geology - 483.1 Soils and Soil Mechanics - 513.3 Petroleum Products - 524 Solid Fuels - 802.3 Chemical Operations - 804.1 Organic Compounds - 922 Statistical Methods Numerical data indexing:Size 1.00e+00m, Size 1.00e+00m to 5.00e+00m, Size 2.00e+01m, Size 3.00e+01m, Size 9.50e+00m to 4.20e+01m DOI:10.13227/j.hjkx.201903142 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256436 Title:Content and Distribution of Cadmium in Soil and Fluvial Sediments in the Sea-Land Interaction Zone Title of translation:海陆交互带土壤及河流沉积物中镉含量及形态分布特征 Authors:Wang, Fang-Ting (1); Chen, Zhi-Hua (1); Bao, Ke (2); Zhao, Xin-Wen (3); Meng, Xian-Meng (1); Huang, Chang-Sheng (3) Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) Safety Center for River and Lake Protection, Construction and Operation, Changjiang Water Resources Commission of the Ministry of Water Resources, Wuhan; 430015, China; (3) Wuhan Geological Survey Center, China Geological Survey, Wuhan; 430205, China Corresponding author:Huang, Chang-Sheng(cshuang@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4581-4589 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Cadmium pollution poses a threat to human health. The examination of spatial distribution of Cd in soils can be used to assess the risks posed to humans and the environment. The enrichment characteristics and variation rules of heavy metal cadmium in the soil were revealed by analyzing the concentration and fractions of Cd in the soil at different depths in the sea-land interaction zone. The results showed that: ① the concentration of Cd in the surface water of Nansha was lower than 0.000 1 mg•L^-1, and the physical and chemical properties of river sediments showed spatial differences with the boundary of "Shang Heng-li River". Cd was mainly deposited in the north of the "Shang Heng-li River", with the mean total Cd of 2.71 mg•kg^-1. The total Cd in the sediment of the "Shang Heng-li River" and the rivers south of it were 0.062-0.39 mg•kg^-1, which caused minimal harm to the marine environment. ② The content of Cd in the soil profile gradually decreased with an increase in soil burial depth. The median content of Cd in the five layers, including 0-20 cm, 20-50 cm, 50-90 cm, 90-140 cm, and 140-200 cm, were 0.51, 0.50, 0.45, 0.42, and 0.33 mg•kg^-1, respectively, and the dispersion degree gradually decreased with an increase in buried depth; the vertical migration amount and migration depth of Cd increased significantly in soils with pH less than 5. ③ The residual Cd in the soil accounted for approximately 40%, and the trend was typically flat with a change in buried depth. The median proportion of acid soluble Cd was consistent with the change in pH and increased with an increase in the buried depth of the profile, while the median proportion of reducible Cd was consistent with the change in iron and manganese content, and decreased with an increase in buried depth of section. These results have important guiding significance for the regional prevention and control of Cd pollution in farmland surrounding cities and the treatment and remediation of polluted soil.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Soil pollution Controlled terms:Cadmium - Health risks - Risk assessment - River pollution - Rivers - Sediments - Soil pollution control - Soils Uncontrolled terms:Enrichment characteristics - Guiding significances - Marine environment - Physical and chemical properties - Prevention and controls - Sea-land interactions - Spatial differences - Vertical migration Classification code:453 Water Pollution - 461.7 Health Care - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1 Accidents and Accident Prevention Numerical data indexing:Percentage 4.00e+01%, Size 0.00e+00m to 2.00e-01m, Size 1.40e+00m to 2.00e+00m, Size 2.00e-01m to 5.00e-01m, Size 5.00e-01m to 9.00e-01m, Size 9.00e-01m to 1.40e+00m DOI:10.13227/j.hjkx.202003033 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608862008 Title:Longitudinal Distribution of Benthic Macroinvertebrates Affected by a Hydropower Plant Cascade in the Mudan River Title of translation:梯级电站作用下牡丹江底栖动物沿程变化规律 Authors:Wen, Jia-Qi (1); Wang, Hao-Ran (1); Chen, Yong-Can (1, 2); Liu, Zhao-Wei (1) Author affiliation:(1) State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing; 100084, China; (2) School of Environment and Resources, Southwest University of Science and Technology, Mianyang; 621010, China Corresponding author:Liu, Zhao-Wei(liuzhw@mail.tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3266-3274 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Hydropower plant operation changes river habitats in various aspects, and thus affects the community composition of the river ecosystem. As a result, the river health is adversely affected. The influence of a hydropower plant cascade on river continuity is even more pronounced. In this study, benthic macroinvertebrates and environmental factors were sampled from the Jingbohu Hydropower Plant to the Shiyan Hydropower Plant, along the Mudan River, and the influence of a hydropower plant cascade on the longitudinal distribution of benthic macroinvertebrates was analyzed. The results demonstrate that the hydropower plant cascade affected several environmental variables and led to changes in the community composition of benthic macroinvertebrates in the Mudan River. Significant differences were observed between sites upstream and downstream of the hydropower plants, with more sensitive species downstream of the hydropower plants. "Run-of-river" hydropower plants exert less adverse influence on benthic macroinvertebrates than dam-type plants. The influence of hydropower plants decreases along the longitudinal direction of the river, with the density and richness of benthic macroinvertebrates increasing.
© 2020, Science Press. All right reserved. Number of references:21 Main heading:Rivers Controlled terms:Ecosystems - Geographical distribution - Hydroelectric power - Hydroelectric power plants Uncontrolled terms:Benthic macroinvertebrates - Community composition - Environmental factors - Environmental variables - Hydropower plants - Longitudinal direction - Longitudinal distribution - Sensitive species Classification code:405.3 Surveying - 454.3 Ecology and Ecosystems - 611.1 Hydroelectric Power Plants DOI:10.13227/j.hjkx.201912084 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070244 Title:Fluorescence Characteristics and Source Analysis of DOM in Snowfall of Xi'an Title of translation:西安市降雪中DOM荧光特性和来源分析 Authors:Yang, Yi (1, 2, 3); Han, Li-Yuan (1); Liu, Huan-Wu (4); Lei, Ying (1); Li, Yi (1); Xu, Hui-Ning (2, 3) 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 University of Architecture and Technology, Xi'an; 710055, China; (3) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (4) Xi'an Environmental Monitoring Station, Xi'an; 710018, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:743-749 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fluorescence characteristics and sources of dissolved organic matter (DOM) in snowfall in Xi'an were studied by three-dimensional fluorescence spectroscopy, parallel factor analysis, and backward trajectory model, which provided a data basis for the analysis of the chemical composition and source of atmospheric organic pollutants. Results show that the DOC content of DOM was 0.88-10.92 mg•L^-1. DOM mainly contained humus-like, fulvic acid-like, tryptophan-like, and tyrosine-like substances. The fluorescence intensity and the summed intensities of these substances exhibited significant positive correlations with the DOC and UV254 (P<0.01). The fluorescence index (FI), biological source index (BIX), and humic index (HIX) values of DOM during snowfall were 1.50-1.75, 0.87-1.25, and 1.11-1.97, respectively. FI was positively correlated with BIX and negatively correlated with HIX (P<0.05). During snowfall, the air mass transmission trajectories included the local transmission, long-distance transmission starting from Xinjiang (through Gansu and Ningxia), and medium-distance transmissions starting from Inner Mongolia (through Ningxia) and Shandong (via Henan), accounting for 38.78%, 24.04%, 19.87%, and 17.31% of the total, respectively. This indicates that the content or relative content of the DOM contained in the precipitation can be characterized by fluorescence intensities and their sums of the humic-like, fulvic acid-like, tryptophan-like, and tyrosine-like tyrosine. The DOM in snowfall had both biological and terrestrial characteristics, and belonged to a self-generated source with the newly produced organic matter or matter with stronger self-source characteristics. Local transmission had the most significant contribution to the source of snowfall DOM.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Chemical analysis Controlled terms:Amino acids - Biogeochemistry - Factor analysis - Fluorescence - Fluorescence spectroscopy - Multivariant analysis - Organic pollutants - Snow - Soils - Trajectories - Transmissions Uncontrolled terms:Backward trajectory - Dissolved organic matters - Fluorescence characteristics - Parallel factor analysis - Source Classification code:443.3 Precipitation - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 602.2 Mechanical Transmissions - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.1 Organic Compounds - 922 Statistical Methods - 922.2 Mathematical Statistics Numerical data indexing:Mass_Density 8.80e-04kg/m3 to 1.09e-02kg/m3, Percentage 1.73e+01%, Percentage 1.99e+01%, Percentage 2.40e+01%, Percentage 3.88e+01% DOI:10.13227/j.hjkx.201907073 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517620 Title:Performance and Microbial Characteristics of Ammonium-limited and Nitrite-limited ANAMMOX Systems Title of translation:限NH4⁺和限NO2^-厌氧氨氧化系统的运行特性及微生物种群特征 Authors:Song, Jia-Jun (1); Zhu, Ming-Yi (1); Guo, Kai-Cheng (1); Wang, Qian (1); Liu, Wen-Ru (1, 2, 3); Shen, Yao-Liang (1, 2, 3) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) National and Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (3) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China Corresponding author:Liu, Wen-Ru(liuwenru1987@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5527-5534 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The performance and microbial characteristics of ammonium-limited and nitrite-limited ANAMMOX reactors were studied in two continuously stirred tank reactors. The influent TN concentrations were controlled below 50 mg•L^-1. The hydraulic retention time and water temperature were maintained at 2.0 h and 20℃, respectively. Results showed that though both ANAMMOX reactors demonstrated similar TN removal loading rates [0.45-0.5 kg•(m³•d)^-1] and TN removal efficiencies (around 70%), the ΔNO3^-/ΔNH4⁺ ratio of the ammonium-limited ANAMMOX reactor showed a faster upward trend. Batch tests and high-throughput sequencing results indicated that the ammonium-limited ANAMMOX reactor had more significant functional and population heterogeneity than the nitrite-limited ANAMMOX reactor. Candidatus_Brocadia was the predominant ANAMMOX bacteria in both reactors. The relative abundance of Candidatus_Brocadia in large granules (53.9%) was significantly higher than that in flocs (19.1%) under the ammonium-limited conditions, whereas only a small difference in relative abundance of Candidatus_Brocadia was observed between the granules (28.1%) and flocs (21.3%) in the nitrite-limited ANAMMOX reactor. Nitrospira-like NOB were detected in both ANAMMOX reactors, which primarily inhabited flocs, seemingly driven by the availability of oxygen. Moreover, the ammonium-limited (i.e., excess nitrite) conditions seemingly favored the growth of Nitrospira. Building upon these results, a control strategy for optimal operation of the ammonium-limited ANAMMOX reactor was proposed based on selective floc discharge.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:Nitrogen removal Controlled terms:Granulation - Wastewater treatment Uncontrolled terms:Continuously stirred tank reactor - High-throughput sequencing - Hydraulic retention time - Microbial characteristics - Population heterogeneity - Relative abundance - Removal efficiencies - Water temperatures Classification code:452.4 Industrial Wastes Treatment and Disposal - 802.3 Chemical Operations Numerical data indexing:Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.91e+01%, Percentage 2.13e+01%, Percentage 2.81e+01%, Percentage 5.39e+01%, Percentage 7.00e+01%, Time 7.20e+03s DOI:10.13227/j.hjkx.202005145 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517749 Title:Characteristics and Reactivity of Ambient VOCs in Urban Hangzhou, China Title of translation:杭州市城区挥发性有机物污染特征及反应活性 Authors:Jing, Sheng-Ao (1); Gao, Ya-Qin (1); Shen, Jian-Dong (2); Wang, Qian (1); Peng, Ya-Rong (1); Li, Ying-Jie (1); Wang, Hong-Li (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) Hangzhou Environmental Monitoring Central Station, Hangzhou; 310007, China Corresponding author:Wang, Hong-Li(wanghl@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5306-5315 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The ambient concentration of 122 volatile organic compound (VOC) species were continuously measured in urban Hangzhou, China from May 2018 to April 2019. The average mixing ratio of VOCs was (59.4±23.6)×10^-9 and the oxygenated VOCs (OVOC) were the largest component. There was no clear "weekend effect" in urban Hangzhou, while the concentration of VOCs had a sharp decrease during long holidays. The concentration of VOCs had a positive correlation with air quality index (AQI) and reached the highest level when the primary pollutant was PM2.5. The assessment results of atmospheric chemical reactivity with •OH radical loss rate (L^•OH) and ozone formation potential (OFP) showed the average value of L^•OH was 7.5 s^-1 and that of OFP was 152.1×10^-9, among which carbonyl compounds, aromatics, and alkenes were the most abundant components. The overall chemical reactivity level of VOCs in Hangzhou was equivalent to 2-methylpentane. The average value of toluene/benzene (T/B) was 1.95, which implied the ambient VOCs in Hangzhou were influenced by vehicle exhaust. Secondary formation (17.6%), combustion (11.8%), industrial processing (12.3%), solvent use (18.1%), biogenic source (4.5%), and vehicle exhaust (35.7%) were identified as six major sources of VOCs in Hangzhou through the positive matrix factorization (PMF) model.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Carbonyl compounds Controlled terms:Air quality - Factorization - Free radicals - Volatile organic compounds Uncontrolled terms:Air quality indices - Ambient concentrations - Industrial processing - Ozone formation potentials - Positive correlations - Positive matrix factorization models - Primary pollutants - Volatile organic compound (VOC) Classification code:451.2 Air Pollution Control - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.18e+01%, Percentage 1.23e+01%, Percentage 1.76e+01%, Percentage 1.81e+01%, Percentage 3.57e+01%, Percentage 4.50e+00% DOI:10.13227/j.hjkx.2020004021 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953488 Title:Characteristics, Sources, and Health Risks of Elements in PM2.5 in Shanxi University Town Title of translation:山西大学城PM2.5中元素特征, 来源及健康风险评估 Authors:Li, Xue-Mei (1); Mu, Ling (1); Tian, Mei (1); Zheng, Li-Rong (1); Li, Yang-Yong (1) Author affiliation:(1) School of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan; 030024, China Corresponding author:Mu, Ling(muling@tyut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4825-4831 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to investigate the pollution characteristics and sources of elements in PM2.5 in the Shanxi University Town in 2017, an energy dispersive X-ray fluorescence spectrometer (ED-XRF) was used to analyze 21 kinds of elements in PM2.5 samples. A health risk assessment was conducted for Mn, Zn, Cu, Sb, Pb, Cr, Co, and Ni. The main sources of elements were identified by the principal component analysis (PCA) and positive matrix factorization (PMF). The results found that, among the 21 kinds of elements in PM2.5 in Shanxi University Town, the mass concentration of Ca was the highest, followed by Si, Fe, Al, S, K, and Cl. These seven elements accounted for 95.71% of the total element concentrations. The concentration of Cr exceeded the annual average concentration limit of ambient air quality standards in China by 104 times. The concentration of Ca in PM2.5 was the highest in spring, summer, and winter, while in autumn the concentration of S was the highest. Mn was the element that had non-carcinogenic risks to the three population types, and the level of risks were in the order of children>adult men>adult women. Cr and Co had tolerable carcinogenic risks, and the risk levels were in the order of adult men>adult women>children. The main sources of elements in PM2.5 in Shanxi University Town in 2017 were natural mineral dust, urban dust, coal combustion, and traffic.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Risk assessment Controlled terms:Air quality - Air quality standards - Coal combustion - Coal dust - Coal industry - Energy dispersive spectroscopy - Factorization - Health risks - X ray spectrometers Uncontrolled terms:Ambient air quality standards - Annual average concentration - Carcinogenic risk - Element concentrations - Energy dispersive X-ray fluorescence - Mass concentration - Natural minerals - Positive Matrix Factorization Classification code:451.2 Air Pollution Control - 461.7 Health Care - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 741.3 Optical Devices and Systems - 902.2 Codes and Standards - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 9.57e+01% DOI:10.13227/j.hjkx.202003011 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952744 Title:Characteristics, Atmospheric Reactivity, and Source Apportionment of Ambient Volatile Organic Compounds in Wuhu Title of translation:芜湖市大气挥发性有机物污染特征, 大气反应活性及源解析 Authors:Gao, Kang (1, 2); Zhang, Hui (1, 2); Liu, Meng-Di (1, 2); Zhao, Xiao-Yu (1, 2); Wu, Ting (1, 2); Jia, Qi-Na (1, 2) Author affiliation:(1) School of Ecology and Environment, Anhui Normal University, Wuhu; 241003, China; (2) Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, Wuhu; 241003, China Corresponding author:Wu, Ting(wuting19@mail.ahnu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4885-4894 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the pollution characteristics, photochemical effects, and sources of atmospheric volatile organic compounds (VOCs) in the urban areas of Wuhu were investigated from September 2018 to August 2019. The results showed that the annual average mixing ratio of ambient VOCs in Wuhu was 27.86×10^-9, with the highest values in fall (31.16×10^-9), followed by summer (28.70×10^-9), winter (24.75×10^-9), and spring (24.04×10^-9). The diurnal patterns showed two VOC peaks, due to traffic exhaust, at 08: 00-09: 00 and 18: 00-19: 00. The estimated total OFP of VOCs was 255.29 μg•m^-3, and aromatics, olefins, alkanes, OVOCs, and halocarbons contributed 48.83%, 21.04%, 18.32%, 11.47%, and 0.35% to the average OFP, respectively. The total AFP was 1.84 μg•m^-3, among which aromatics and alkanes accounted for 87.69% and 12.31%, respectively. The ratios of B/T/E indicated that atmospheric aromatic hydrocarbons were mainly derived from vehicle exhaust, as well as industry emission and solvent usage. Source apportionment indicated that petroleum evaporation, vehicle exhaust, solvent evaporation, liquefied petroleum gas (LPG), biogenic source, and secondary source shared 11.57%, 34.53%, 16.63%, 20.76%, 3.54%, and 12.97% of ambient VOCs during the sampling period, respectively.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Aromatic hydrocarbons Controlled terms:Aromatization - Evaporation - Gasoline - Liquefied petroleum gas - Paraffins - Volatile organic compounds Uncontrolled terms:Industry emissions - Liquefied petroleum gas (LPG) - Photochemical effect - Secondary sources - Solvent evaporation - Source apportionment - Traffic exhausts - Vehicle exhausts Classification code:523 Liquid Fuels - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds Numerical data indexing:Percentage 1.15e+01%, Percentage 1.16e+01%, Percentage 1.23e+01%, Percentage 1.30e+01%, Percentage 1.66e+01%, Percentage 1.83e+01%, Percentage 2.08e+01%, Percentage 2.10e+01%, Percentage 3.45e+01%, Percentage 3.54e+00%, Percentage 4.88e+01%, Percentage 8.77e+01% DOI:10.13227/j.hjkx.202002078 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953309 Title:Distribution of Antibiotic Concentration in Domestic Wastewater Treatment Facilities in Villages and Towns Title of translation:村镇生活污水处理设施抗生素浓度分布规律 Authors:Lu, Ya-Nan (1, 2, 3); Guo, Ya-Ni (1); Wang, Kun (4); Lu, Wei-Dong (4); Wang, Tuo (2, 3); Chai, Yu-Feng (3); Liu, Meng-Meng (2, 3); Zhong, Hui (2, 3); Chen, Mei-Xue (2, 3); Wei, Yuan-Song (2, 3) Author affiliation:(1) School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an; 710048, China; (2) State Key Joint Laboratory of Environmental 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) Beijing Zhongsi Shuiling Water Treatment Technology Co., Ltd., Beijing; 100048, China Corresponding author:Chen, Mei-Xue(mxchen@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:5008-5015 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Antibiotics discharged into the environment cause increased environmental resistance. Four types of antibiotics (quinolones, tetracyclines, macrolides, and β-lactams) were selected for this study. In a comparison with the municipal wastewater plant, the concentration and removal of antibiotics in influent and effluent of domestic wastewater treatment facilities of different scales in villages and towns was investigated using high-performance liquid chromatography (HPLC) and tandem mass spectrometry (MS). The results showed that the highest amount of ofloxacin in rural wastewater treatment facilities reached 32 663.5 ng•L^-1. Due to the different situations of influent fluctuation, discharge requirements, and management between urban and rural wastewater plants, only 33% of the rural domestic wastewater facilities detected an antibiotics removal rate of more than 60%. The effective removal of some antibiotics can be achieved when the rural domestic wastewater treatment facilities maintain the standard discharge of conventional pollutants.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Wastewater treatment Controlled terms:Amides - Antibiotics - Effluent treatment - Effluents - High performance liquid chromatography - Mass spectrometry - Reclamation - Rural areas - Sewage treatment plants - Water treatment plants Uncontrolled terms:Antibiotic concentration - Domestic waste water treatment - Domestic wastewater - Effective removals - Environmental resistance - Municipal wastewaters - Tandem mass spectrometry - Wastewater treatment facilities Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.6 Medicine and Pharmacology - 801 Chemistry - 804.1 Organic Compounds Numerical data indexing:Mass_Density 6.64e-07kg/m3 to 2.20e-02kg/m3, Percentage 3.30e+01%, Percentage 6.00e+01% DOI:10.13227/j.hjkx.202003143 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796175 Title:Characteristics of VOCs and Their Roles in Ozone Formation at a Regional Background Site in Beijing, China Title of translation:上甸子区域背景站VOCs污染特征及其对臭氧生成贡献 Authors:Han, Ting-Ting (1, 2); Li, Ying-Ruo (1, 2, 3); Qiu, Yu-Lu (1, 2); He, Di (1, 2); Wang, Yao (1, 2); Ma, Zhi-Qiang (1, 2) Author affiliation:(1) Institute of Urban Meteorology, China Meteorological Administration, Beijing; 100089, China; (2) Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei, Beijing; 100089, China; (3) Key Laboratory of Atmospheric Chemistry, China Meteorological Administration, Beijing; 100081, China Corresponding author:Ma, Zhi-Qiang(zqma@ium.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2586-2595 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As important precursors of near-surface ozone, secondary organic aerosols (SOAs), and volatile organic compounds (VOCs) play an important role in photochemical reactions and fine particle formation. In this study, real-time VOCs were measured continuously by Syntech Spectras GC955 analyzers at the regional background site of the North China Plain from September 1 to 27, 2017. The VOC concentration levels, compositions, spatiotemporal variations, and the ozone formation potential during the observation period were investigated. The potential sources of initial VOCs indicated from the diagnostic ratios were further studied. The averaged total mixing ratio of VOCs was 12.53×10^-9. Among all measured VOC species, alkanes were the most abundant species, which accounted for 65.3% of the total concentrations, followed by alkenes (26.7%) and aromatics (6.5%). In addition, the total OH radical loss rate of VOCs (L^•OH) was 5.2 s^-1. In particular, the contribution of C4-C5 alkenes to L^•OH was as high as 61%, followed by C2-C3 alkenes, with a 12.8% contribution of L^•OH. The average ozone formation potential of VOCs was 36.5×10^-9. Among all the measured VOC species, alkenes were the most abundant species, which accounted for 71.2%. Among alkenes, the contribution of C4-C5 alkenes was the most prominent. Although the concentration of alkanes in Shangdianzi was much higher than other VOC species, the ozone formation potential was lower. Diagnostic ratios and source implications suggested that Shangdianzi was affected mainly by biomass/biofuel/coal burning, with substantially elevated benzene levels during the observation period, whereas a slight influence of traffic-related emissions was observed.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Olefins Controlled terms:Free radical reactions - Free radicals - Ozone - Paraffins - Photochemical reactions - Volatile organic compounds Uncontrolled terms:Concentration levels - Diagnostic ratios - North China Plain - Observation Period - Ozone formation potentials - Secondary organic aerosols - Spatio-temporal variation - Traffic-related emissions Classification code:802.2 Chemical Reactions - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 1.28e+01%, Percentage 2.67e+01%, Percentage 6.10e+01%, Percentage 6.50e+00%, Percentage 6.53e+01%, Percentage 7.12e+01% DOI:10.13227/j.hjkx.201912032 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990500 Title:Modeling Studies of Source Contributions to PM2.5 in Chengdu, China Title of translation:基于模型模拟的成都市PM2.5污染来源解析 Authors:Xu, Yan-Ling (1, 2); Yi, Ai-Hua (3); Xue, Wen-Bo (2) Author affiliation:(1) Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing; 100124, China; (2) Center for Regional Air Quality Simulation and Control, Chinese Academy for Environmental Planning, Beijing; 100012, China; (3) Center for Environment & Engineering, Ministry of Ecology and Environment, Beijing; 100012, China Corresponding author:Xue, Wen-Bo(xuewb@caep.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:50-56 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study establishes eight emission scenarios in the air pollutant emissions inventory of Chengdu City, China. We use the Weather Research and Forecasting and Community Multiscale Air Quality (WRF-CMAQ) models and a "zero-out" approach to investigate contributions of air pollution transport and sources to aerosol fine particulate matter (PM2.5) pollution in Chengdu City during January, April, July, and October 2015. The results showed that PM2.5 pollution in Chengdu City was serious during these months and reached >130 μg•m^-3 in January. Highest concentrations were measured in the city center. PM2.5 pollution in Chengdu and the surrounding cities was found to exhibit regional characteristics. Since the air mass was stable during the monitoring periods, the interregional transmission capability of air pollution was poor, and thus local sources were the main contributors (61% of the annual average concentration) to PM2.5 pollution in Chengdu City. The contributions of local sources in April and July were higher than of those in January and October. We found that the main sources of PM2.5pollution in Chengdu City were automobile emission (29% of the total), dust (26%), and domestic pollution (24%), and should be further controlled in the future.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Atmospheric movements Controlled terms:Air quality - Weather forecasting Uncontrolled terms:Air pollutant emission - Air pollution transport - Annual average concentration - Community multi-scale air qualities - Fine particulate matter (PM2.5) - Regional characteristics - Transmission capability - Weather research and forecasting Classification code:443 Meteorology - 443.1 Atmospheric Properties - 451.2 Air Pollution Control Numerical data indexing:Percentage 2.40e+01%, Percentage 2.60e+01%, Percentage 2.90e+01%, Percentage 6.10e+01% DOI:10.13227/j.hjkx.201905041 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990451 Title:Spatial Distribution of Soil Arsenic and Arsenic Enrichment in Crops in the Oasis Region of the Southeastern Tarim Basin Title of translation:塔里木盆地东南缘绿洲区土壤砷空间分布及农作物砷富集特征 Authors:Chen, Yun-Fei (1, 2); Zhou, Jin-Long (1, 2); Zeng, Yan-Yan (1, 2); Wang, Song-Tao (3); Du, Jiang-Yan (3); Sun, Ying (1, 2); Gu, Si-Bo (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; (3) No.2 Hydrogeology and Engineering Geology Party of Xinjiang Bureau of Geology and Mineral Resources Exploration and Development, Changji; 831100, China Corresponding author:Zhou, Jin-Long(zjzhoujl@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:438-448 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We use 3487 surface soil samples, 35 soil profile samples, and 93 agricultural products and root soil samples obtained from the southeastern Tarim basin, Xinjiang, northwestern China (Ruoqiang County and Qiemo County, Bayingguo Mongolia Autonomous Prefecture, and Minfeng County and Yutian County, Hetian Prefecture) to assess As contamination. Multivariate statistical analysis, geostatistics, and global information system (GIS) techniques are used to study: the spatial distribution characteristics of soil As, the effects of various agricultural products on As enrichment, and to compare the characteristics of the As content of agricultural products and root soils in spatially significantly and non-significantly autocorrelated regions. The As content of soil samples were relatively low, and the average As contents determined for agricultural land and non-agricultural land were 9.81 mg•kg^-1 and 7.94 mg•kg^-1, respectively. We found that 568 surface soil samples (16.3% of all samples) had an As content that exceeded Xinjiang soil background values (11.2 mg•kg^-1) and that five samples exceeded the risk screening values (25 mg•kg^-1). The Moran's indexes of spatial autocorrelation were>0, and the main aggregation types of spatial autocorrelation of soil As were high-high and low-low types, with the zone of the high-high type being mainly located in the agricultural land of each county. A GIS spatial distribution map showed that the high value area of soil As content presented a flaky or island-like scattered distribution. The standard deviation ellipses showed that the trend direction of soil As content in: Ruoqiang County was from north to south, Qiemo County and Minfeng County were both from southwest to northeast, and Yutian County was from northwest to southeast. The As content of the vertical profiles of the agricultural land in Ruoqiang County fluctuated from the surface to depth, whereas those of other counties were relatively stable. The As enrichment ability of crops was ranked as: root vegetables>walnuts>wheat>corn>red dates. The As contents of corn and red dates showed a significant positive correlation with that of the root soil. There was no significant difference in the As content of agricultural products between significant autocorrelation zones and non-significant autocorrelation zones, whereas there was a significant difference in the As content of root soils.
© 2020, Science Press. All right reserved. Number of references:41 Main heading:Soil surveys Controlled terms:Agricultural products - Agricultural robots - Arsenic - Autocorrelation - Crops - Multivariant analysis - Screening - Soils - Spatial distribution - Spatial variables measurement Uncontrolled terms:Distribution characteristics - Global information systems - Multivariate statistical analysis - Non-agricultural lands - Positive correlations - Southeastern Tarim basin - Spatial autocorrelations - Spatial distribution map Classification code:483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 821.4 Agricultural Products - 921 Mathematics - 922 Statistical Methods - 943.2 Mechanical Variables Measurements Numerical data indexing:Percentage 1.63e+01% DOI:10.13227/j.hjkx.201907016 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990450 Title:Adsorption of Phosphate on Mg/Fe Layered Double Hydroxides (Mg/Fe-LDH) and Use of Mg/Fe-LDH as an Amendment for Controlling Phosphorus Release from Sediments Title of translation:镁铁层状双金属氢氧化物对磷酸盐的吸附作用及对内源磷释放的控制效果及机制 Authors:Wu, Jun-Lin (1); Lin, Jian-Wei (1); Zhan, Yan-Hui (1); Cheng, Yong-Qian (2); Bai, Xiao-Yun (1); Xin, Hui-Min (1); Chang, Ming-Yue (1) Author affiliation:(1) College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai; 201306, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Lin, Jian-Wei(jwlin@shou.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:273-283 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We determine the efficiency and mechanism of Mg/Fe layered double hydroxides (Mg/Fe-LDH) addition for the control of phosphorus (P) release from sediments by studying the adsorption behavior and mechanism of phosphate from an aqueous solution on Mg/Fe-LDH. The impact of Mg/Fe-LDH addition on the mobilization of P in sediments as well as the adsorptive removal of phosphate by sediments is investigated, and the stabilization of P bound by Mg/Fe-LDH is also evaluated. Results showed that the kinetics data of phosphate adsorption onto Mg/Fe-LDH fitted better with the Elovich kinetics model than with the pseudo-first-order and pseudo-second-order kinetics models, and that the Freundlich and Dubinin-Radushkevich models were more suitable for describing the adsorption isotherm behavior of phosphate on Mg/Fe-LDH than the Langmuir model. Phosphate adsorption possessed a wide effective pH range of 4-10. Coexisting Ca²⁺ and Mg²⁺ enhanced phosphate adsorption onto Mg/Fe-LDH, while coexisting Na⁺, K⁺, and Cl^- had negligible impacts on the phosphate adsorption. The presence of SO4^2- and HCO3^- in aqueous solution inhibited the adsorption of phosphate on Mg/Fe-LDH. The phosphate adsorption mechanisms were deduced to be anion exchange, electrostatic attraction, ligand exchange and inner-sphere complex formation. The addition of Mg/Fe-LDH into sediments not only greatly reduced the concentration of reactive soluble P (SRP) in the overlying water, but also significantly decreased the level of SRP in the pore water. In addition, Mg/Fe-LDH addition also increased the adsorption capacity for the sediments, and the phosphate adsorption ability for the Mg/Fe-LDH-amended sediments increased with increased amendment dosage. Almost half of the phosphate bound by Mg/Fe-LDH existed in the form of relatively stable P, i.e., metal oxide-bound P (NaOH-rP), which was difficult to release back into the water column under normal pH and anoxic conditions. Nearly half of the phosphate bound by Mg/Fe-LDH existed in the form of easily released P, i.e., NH4Cl extractable P (NH4Cl-P) and redox-sensitive P (BD-P), which had a high risk of re-releasing into the water column. We conclude that it is very necessary for Mg/Fe-LDH to be recycled from the sediments after the application of Mg/Fe-LDH as an amendment to control sedimentary P liberation.
© 2020, Science Press. All right reserved. Number of references:51 Main heading:Magnesium compounds Controlled terms:Adsorption - Chlorine compounds - Kinetics - Metals - Sediments - Sodium hydroxide Uncontrolled terms:Adsorption behavior - Adsorption capacities - Dubinin-Radushkevich - Electrostatic attractions - Inner sphere complexes - Layered double hydroxides - Phosphate adsorption - Pseudo second order kinetics Classification code:483 Soil Mechanics and Foundations - 802.3 Chemical Operations - 931 Classical Physics; Quantum Theory; Relativity DOI:10.13227/j.hjkx.201907174 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278134 Title:Characteristics and Source Apportionment of Dustfall Pollution in the Coal Mine Area and Surrounding Areas of Wuhai City in Spring Title of translation:乌海市煤矿区及周边春季降尘污染特征及来源分析 Authors:Wu, Hong-Xuan (1); Shi, Chang-Qing (1); Zhang, Yan (1); Zhao, Ting-Ning (1); Hu, Ping (1); Liu, Yun (1); Chen, Tong (1) Author affiliation:(1) School of Soil and Water Conservation, Beijing Forestry University, Beijing; 100083, China Corresponding author:Shi, Chang-Qing(scqbj@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1167-1175 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the concentration levels, pollution characteristics of each functional area, and sources of pollutants of the dust heavy metals Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Ni, Pb, Sb, Ti, V, and Zn in spring in Wuhai, 43 groups of dust samples were collected from different locations within the city from March to June 2018. The heavy metal mass concentration was then measured using an inductively coupled plasma optical emission spectrometer (ICP-OES). The results showed that: ①The average contents of As, Cd, Cu, Pb, Cr, Ni, Sb, and Zn were 408.78, 1.97, 27.40, 38.93, 45.97, 25.41, 2.71, and 277.76 mg•kg^-1, respectively, which were higher than the background values of the element soil. ②Only 5 of the 18 elements had significant differences in individual intervals, and the 18 elements had similar enrichment characteristics in 5 functional areas. This meant that the heavy metal pollution of dustfall in various functional areas of Wuhai was similar. ③As, Cd, Cr, and Pb elements were key pollution factors, and their comprehensive pollution indexes were 3.332, 2.622, 1.369, and 0.523, respectively, with As and Cd as primary factors. ④Through the analysis of pollution sources, it was found that in the Wuhai area the atmospheric dustfall was mainly caused by industrial emissions, coal burning, traffic dust, and coal mining and transportation. Factor analysis and multiple linear regression showed that coal was the main source of Cd pollution, with coal mining and transportation and industrial emissions accounting for 77.58% and 22.42%, respectively. The sources of As were complex, with 18.99% from industrial emissions, 15.87% from coal burning, and 6.79% from unknown sources.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Coal mines Controlled terms:Air pollution - Cadmium - Coal - Coal dust - Coal industry - Coal transportation - Elementary particle sources - Heavy metals - Inductively coupled plasma - Industrial emissions - Linear regression - Pollution detection - Springs (components) - Zinc Uncontrolled terms:Concentration levels - Dustfall - Enrichment characteristics - Heavy metal pollution - Inductively coupled plasma optical emission spectrometer - Multiple linear regressions - Opencast mine - Source apportionment Classification code:451 Air Pollution - 451.1 Air Pollution Sources - 503.1 Coal Mines - 524 Solid Fuels - 531 Metallurgy and Metallography - 546.3 Zinc and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 601.2 Machine Components - 922.2 Mathematical Statistics - 932.3 Plasma Physics Numerical data indexing:Percentage 1.59e+01%, Percentage 1.90e+01%, Percentage 2.24e+01%, Percentage 6.79e+00%, Percentage 7.76e+01% DOI:10.13227/j.hjkx.201907037 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278094 Title:Pollution Characteristics and Risk Assessment of Typical Organophosphate Esters in Beijing Municipal Wastewater Treatment Plant and the Receiving Water Title of translation:北京某污水处理厂及受纳水体中典型有机磷酸酯的污染特征和风险评估 Authors:Zhang, Zhen-Fei (1, 2); Lü, Jia-Pei (2); Pei, Ying-Ying (2); Wang, Chun-Ying (1); Guo, Chang-Sheng (2); Xu, Jian (2) Author affiliation:(1) College of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou; 341000, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China Corresponding author:Guo, Chang-Sheng(guocs@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1368-1376 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Organophosphate esters (OPEs) are ubiquitous in the environment and pose a potential threat to ecosystems and human health. A method for the determination of eight OPEs by ultra-performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS) was established. The recovery rates of eight target compounds with different solid-phase extraction columns, different eluents, and different eluent volumes were compared. The results showed that using ENVI-18 column enrichment, OPEs were eluted with 8 mL acetonitrile containing 25% (volume fraction) dichloromethane, and the labeled recovery rate of the target compound was 92.5%-102.2%. The recoveries of different matrix samples were 88.5%-116.1% and relative standard deviation was 1.7%-9.9%. The concentration range of 8 different detectable organophosphate esters in the effluent of sewage treatment plant is 85.9-235.4 ng•L^-1 during the six-day sampling process, permissive river downstream of the six-day ∑OPEs average total concentration was 130.3 ng•L^-1, higher than the 119.4 ng•L^-1 upstream water concentration, but lower than the sewage treatment plant effluent concentration of total 162.5ng•L^-1. The study shows that the sewage treatment plant cannot completely remove OPEs; for triethyl phosphate (TEP) and 3 (2-ethyl hexyl) phosphate ester (TEHP) there exists a negative removal phenomenon, whereas for other OPEs the removal rate was between 14.1% and 84.9%, and the total ∑OPEs removal rate by the sewage plant was 50.0%. The TPhP in the effluent of the sewage treatment plant has medium environmental risk (RQ>0.1), and other organophosphates have low environmental risk (RQ<0.1); however, the long-term mixing effects of organophosphate esters on the ecosystem of the receiving river should not be ignored.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Sewage treatment plants Controlled terms:Dichloromethane - Ecosystems - Effluent treatment - Effluents - Esters - Extraction - Health risks - Liquid chromatography - Phase separation - Recovery - Risk assessment - River pollution - Rivers - Sewage pumping plants - Sewage treatment - Wastewater treatment - Water treatment Uncontrolled terms:Environmental risks - Municipal wastewater treatment plants - Organophosphate esters - Receiving waters - Sewage-treatment plant effluent - Solid-phase extraction - Solid-phase extraction columns - Ultra performance liquid chromatography Classification code:445.1 Water Treatment Techniques - 452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 453 Water Pollution - 454.3 Ecology and Ecosystems - 461.7 Health Care - 802.3 Chemical Operations - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention Numerical data indexing:Mass_Density 1.19e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 1.30e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 1.63e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 8.59e-08kg/m3 to 2.35e-07kg/m3, Percentage 1.41e+01% to 8.49e+01%, Percentage 1.70e+00% to 9.90e+00%, Percentage 2.50e+01%, Percentage 5.00e+01%, Percentage 8.85e+01% to 1.16e+02%, Percentage 9.25e+01% to 1.02e+02%, Volume 8.00e-06m3 DOI:10.13227/j.hjkx.201908040 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278125 Title:Chemical Characteristics and Source Apportionment of Water-Soluble Ions in Atmosphere Aerosols over the East China Sea Island During Winter and Summer Title of translation:中国东海近海岛屿冬季与夏季气溶胶中水溶性离子化学组分特征及来源解析 Authors:Fang, Yan (1, 2); Cao, Fang (1, 2); Fan, Mei-Yi (1, 2); Zhang, Yan-Lin (1, 2) Author affiliation:(1) 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, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Cao, Fang(caofangle@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1025-1035 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A total of 70 total suspended particulate (TSP) samples were collected from December 2017 to February 2018 and June to August 2018 in Shengsi Islet, East China Sea. In this study, the mass concentrations of water-soluble ions in the TSP (including Na⁺, K⁺, NH4⁺, Mg²⁺, Ca²⁺, Cl^-, SO4^2-, NO3^-, and MSA) samplers were determined by ion chromatography. The chemical characteristics, seasonal differences, and main sources of water-soluble ions in this background aerosol site were investigated by a multiple-technique analysis combining a HYSPLIT model, correlation analysis of water-soluble ions, and primary component analysis. The results showed that the average mass concentrations of TSP and the main water-soluble inorganic ions (WSIIs) were both high in winter and low in summer; the average mass concentration of total WSIIs in winter was (26.5±16.3) μg•m^-3, and in summer was (8.8±3.8) μg•m^-3. Secondary inorganic ions (NO3^-, SO4^2-, and NH4⁺) are the most important ionic components in TSP, which accounted for 86.2% and 74.9% of TWSIIs in winter and summer, respectively. Meanwhile, the study site was affected by seasonal temperature change, long-distance transmission, and summer biogenic sulfates. The mass concentration of nitrate was highest in winter, and the mass concentration of sulfate was highest in summer. Anthropogenic sources were the main source of nss-SO4^2- in atmospheric aerosols. The analysis of sulfate sources showed that contributions of biogenic sulfates to nss-SO4^2- were 28.1% and 5.9% in summer and winter, respectively. The results of principal component analysis indicated that the main sources of aerosol chemical composition were marine and anthropogenic sources in summer and winter, respectively. In winter, Cl^-showed a certain degree of enrichment due to the influence of human activities, and the average value of the enrichment factor was 38.5%.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Particles (particulate matter) Controlled terms:Atmospheric aerosols - Ion chromatography - Ions - Sulfur compounds Uncontrolled terms:Background aerosol - East China Sea - Sea salts - Total suspended particulates - Water-soluble ions Classification code:443.1 Atmospheric Properties - 801 Chemistry - 951 Materials Science Numerical data indexing:Percentage 2.81e+01%, Percentage 3.85e+01%, Percentage 5.90e+00%, Percentage 7.49e+01%, Percentage 8.62e+01% DOI:10.13227/j.hjkx.201909081 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371176 Title:Effects of Nano-magnesium Hydroxide on the Forms of Cadmium in Different Types of Soil Title of translation:纳米氢氧化镁对不同类型土壤镉形态的影响 Authors:Deng, Ji-Bao (1); Zhang, Chun-Lai (1); Xu, Wei-Hong (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China Corresponding author:Xu, Wei-Hong(xuwei_hong@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1888-1903 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effects of nano-magnesium hydroxide and common magnesium hydroxide (100, 200, and 300 mg•kg^-1) on the forms of cadmium in different types of cadmium contaminated soils (1, 5, 10, and 15 mg•kg^-1) were studied under 28 days of continuous culture experiment. In the neutral soil, during the 28 days of culture, soil exchange Cd (EX-Cd) form distribution ratio (FDC) decreased at first and then increased with the culture time increasing under treatment of 1, 5, 10, and 15 mg•kg^-1 Cd. The minima of soil EX-Cd FDC were found on the 14th day under 1 mg•kg^-1 Cd and 5 mg•kg^-1 Cd treatments, whereas the minima of soil EX-Cd FDC were observed on the 4th day under 10 mg•kg^-1 Cd and 15 mg•kg^-1 Cd treatments. The FDC of soil carbonate bound Cd (CAB-Cd), iron manganese oxidized Cd (FeMn-Cd), and organic bound Cd (OM-Cd) increased at first, then decreased, and finally, became stable, and the maxima of soil CAB-Cd, FeMn-Cd, and OM-Cd FDC were found on the 4th day, whereas the minima of soil CAB-Cd, FeMn-Cd, and OM-Cd FDC were observed on the 14th day. Soil residual Cd (RES-Cd) FDC increased gradually and then tended to becomes stable during the 28 days of culture. The soil EX-Cd FDC was 66.7%-81.8% at 1, 5, 10, and 15 mg•kg^-1 Cd treatments, which was the main form of the soil. The FDC of soil Cd forms was in the order of EX-Cd >CAB-Cd >RES-Cd >FeMn-Cd >OM-Cd. Soil EX-Cd FDC reached the lowest value on the 14th Day. Soil EX-Cd FDC was reduced by nano-magnesium hydroxide and common magnesium hydroxide, and it decreased with the increase of the amount of magnesium hydroxide. During 0-28 days of culture, the soil EX-Cd FDC decreased by 11.4%-67.7%, 7.8%-37.2%, 7.7%-36.4%, 5.0%-28.8% (nano-magnesium hydroxide) and 0.5%-49.5%, 0.6%-15.0%, 1.0%-18.1%, 0.7%-14.6% (ordinary magnesium hydroxide) at 1, 5, 10, and 15 mg•kg^-1 Cd treatments, respectively. The EX-Cd content of alkaline soil reached the lowest value on the 7th day of culture, and the EX-Cd content of acidic soil reached the lowest value on the 21st day under 1, 5, and 10 mg•kg^-1 Cd treatments. The content of EX-Cd in neutral, acidic, and alkaline soils decreased with the increase of magnesium hydroxide content, and the content of EX-Cd in soil decreased with the increase of magnesium hydroxide amount. At the same amount, the effect of passivating soil EX-Cd under nanometer magnesium hydroxide treatment was superior to ordinary magnesium hydroxide treatment.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Cadmium alloys Controlled terms:Electric network topology - Iron alloys - Magnesium compounds - Manganese alloys - Soil pollution - Soils Uncontrolled terms:Alkaline soils - Contaminated soils - Continuous culture - Culture time - Distribution ratio - EX-Cd - Magnesium hydroxide - Neutral soils Classification code:483.1 Soils and Soil Mechanics - 543.2 Manganese and Alloys - 545.2 Iron Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 703.1 Electric Networks Numerical data indexing:Age 0.00e+00yr to 7.67e-02yr, Age 7.67e-02yr, Percentage 1.14e+01% to 6.77e+01%, Percentage 5.00e-01% to 4.95e+01%, Percentage 6.67e+01% to 8.18e+01% DOI:10.13227/j.hjkx.201910135 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658113 Title:Effect of Artificial Mixing on Temporal and Spatial Succession of Algae Community Structure in Jinpen Reservoir Title of translation:人工强制混合对金盆水库水体藻类群落结构时空演替的影响 Authors:Wang, Chen-Xu (1, 2); Huang, Ting-Lin (1, 2); Li, Nan (1, 2); Qi, Yun-Zhi (3); Xu, Jin-Lan (1, 2); Si, Fan (1, 2); Zhang, Han (1, 2); Lu, Lin-Chao (1, 2) Author affiliation:(1) Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Xi'an Water Group Heihe Jinpen Reservoir Management Company, Xi'an; 710401, China Corresponding author:Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2166-2176 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the effect mechanism of the artificial mixing process on the temporal and spatial succession of algae community structure in a water body, this study used water-lifting aerators to induce in-situ artificial mixing of the water body of Jinpen Reservoir, and in-situ spot physical-chemical parameters and algae of the water body of the reservoir were observed during an artificial mixing process. A total of 51 species of 28 genera of 6 families of algae were identified in the water body of the Jinpen Reservoir. The artificial mixing effect of the water-lifting aerators significantly inhibited the growth of algae in the water, and had a significant impact on the community structure. Before activation of the water-lifting aerators, algae were mainly distributed in the surface water body, and Chlorella vulgaris was the dominant species. With the operation of the water-lifting aerators, the algal density of surface water body decreased significantly, and the vertical distribution of the algae density in the water body tended to be uniform. The dominant species tended to succeed in Cyclotella sp. This study used the method of redundancy analysis, combined with critical depth theory and the characteristics of algae growth, to analyze the relationship between the spatial-temporal succession of algae community structure and the changes in the main physical-chemical parameters in Jinpen Reservoir during the artificial process. The analysis results showed that the artificial mixing of the water-lifting aerators mainly affects the temporal and spatial succession of the algae community structure by rapidly destroying the thermal stratification stability of the water body and significantly increasing the water mixing depth.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Reservoirs (water) Controlled terms:Algae - Chemical analysis - Mixing - Salinity measurement - Surface waters - Water aeration Uncontrolled terms:Chlorella vulgaris - Community structures - Physical-chemical parameters - Redundancy analysis - Spatial temporals - Surface water body - Temporal and spatial - Vertical distributions Classification code:441.2 Reservoirs - 444.1 Surface Water - 445.1 Water Treatment Techniques - 802.3 Chemical Operations DOI:10.13227/j.hjkx.201910036 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658116 Title:Molecular Chemo-diversity of the Dissolved Organic Matter Occurring in Urban Stormwater Runoff Title of translation:城市雨水径流中溶解性有机物的分子化学多样性 Authors:Nie, Yun-Han (1); Chen, Hao (2); Li, Lei (1); Zhu, Yi (1); Zhao, Xin (1); Jia, Qi-Long (2); Xu, Hui-Ting (3); 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; 20233, 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:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2272-2280 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Stormwater runoff pollution occurring in urban areas can be a notable threat to the ecological environments of receiving water bodies. Dissolved organic matter (DOM) constitutes the primary type of pollutant in stormwater runoff, and tracking of its components and sources can provide valuable scientific bases for the future abatement of stormwater runoff pollution. In this study, aiming to demonstrate the characteristics and sources of the contained DOM in both pavement runoff (PR) and greenland runoff (GR), we applied ultra-high-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) to analyze the molecular chemo-diversity of their DOM, as well as Spearman rank correlations between the molecular chemo-diversity and water quality indicators including suspended solids (SS), total nitrogen (TN), dissolved organic carbon (DOC), and dissolved lead (Pb). The results show: ① When the molecular accumulation reaches a saturated state, the cumulative number of molecules of PR-DOM (12498) is much larger than that of GR-DOM (7015). The molecular distribution of PR-DOM (150-750) is smaller yet more concentrated than that of GR-DOM (150-850). ② According to the molecular composition characterization and Spearman rank correlation analysis, the sources of the components of PR-DOM and GR-DOM are remarkably different. PR-DOM can be greatly influenced by human activities, and its primary element component (CHOS) contains a large number of substances that were recognized to be from the surfactant sulfonic acid. Additionally, the significant aliphatic components that emerged were from traffic pollution. In contrast, GR-DOM is less affected by human activities, and its primary element component (CHO) gives priority to natural organic matter (NOM). The most abundant substance component that occurred in GR-DOM, i.e., the highly unsaturated and phenolic compound that generally originates in the degraded humus, is initially formed by the plant residue and flushed by rainfall runoff.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Runoff Controlled terms:Biogeochemistry - Dissolution - Mass spectrometry - Organic carbon - Soils - Storm sewers - Storms - Water pollution - Water quality Uncontrolled terms:Dissolved organic carbon - Dissolved organic matters - Ecological environments - Fourier transform ion cyclotron resonance mass spectrometry - Natural organic matters - Spearman rank correlation - Urban stormwater runoff - Water quality indicators Classification code:442.1 Flood Control - 443.3 Precipitation - 445.2 Water Analysis - 452.1 Sewage - 453 Water Pollution - 483.1 Soils and Soil Mechanics - 801 Chemistry - 801.2 Biochemistry - 802.3 Chemical Operations - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201910238 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256432 Title:Analysis of Rapid Start-up and Mixed Nutritional Nitrogen Removal Performance of Complete Autotrophic Granular Sludge Title of translation:全程自养颗粒污泥快速启动及混合营养型脱氮性能分析 Authors:Qi, Ze-Kun (1); Wang, Jian-Fang (1, 2, 3); Qian, Fei-Yue (1, 3, 4); Liu, Yu-Xin (1); Qiao, Wei (2); Li, Xiao-Die (2) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) College of Tianping, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (4) Jiangsu High Education Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China Corresponding author:Wang, Jian-Fang(wjf302@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4653-4660 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A rapid start of the completely autotrophic nitrogen removal over nitrite (CANON) process based on granular sludge and efficient nitrogen removal under mixotrophic conditions are important steps in a continuous flow reactor for CANON engineering applications. In this study, an aged CANON granular sludge was mechanically crushed to 0.3 mm as inoculum in an airlift internal-loop reactor (AIR) to achieve simultaneous COD removal and mixotrophic denitrification of the single-stage granular sludge. The system achieved stable partial nitrification by controlling DO after 26 days of startup. Granulation and anaerobic ammonia oxidation were then promoted by shortening the HRT to increase the ammonia nitrogen load to 5.65 kg•(m³•d)^-1. The total nitrogen removal rate reached 58% on the 68^th day. Subsequently, the C/N ratio of influent was increased from 0 to 0.25 and 0.5, which promoted the synergistic growth of AOB, AMX, and heterotrophic microorganisms. The removal rates of ammonia and total nitrogen were 95% and 85% respectively, and the removal of COD reached approximately 80%. The activity of NOB such as Nitrospira was effectively inhibited as the COD concentration was increased. q(NH4⁺-N) and q(TN) were stable at 0.4 g•(g•h)^-1 and 0.34 g•(g•h)^-1, respectively, while q(NO3^--N) was approximately 0.02 g•(g•h)^-1. Microbial diversity was observed using MiSeq high-throughput sequencing. It showed that organic carbon had no significant effect on the abundance of Nitrosomomas and Candidutus_Kuenenia, while increasing the abundance of Candidutus_Brocadia and Denitratisoma in the sludge. This study provides ideas for the rapid start of continuous flow CANON granular sludge process to treat wastewater with low C/N ratio.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Nitrogen removal Controlled terms:Ammonia - Chemical oxygen demand - Granular materials - Organic carbon - Wastewater treatment Uncontrolled terms:Airlift internal-loop reactors - Autotrophic nitrogen removal - Continuous flow reactors - Engineering applications - High-throughput sequencing - Mixotrophic denitrifications - Partial nitrification - Total nitrogen removal Classification code:452.4 Industrial Wastes Treatment and Disposal - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Age 7.12e-02yr, Percentage 5.80e+01%, Percentage 8.00e+01%, Percentage 8.50e+01%, Percentage 9.50e+01%, Size 3.00e-04m DOI:10.13227/j.hjkx.202002163 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256417 Title:Polybrominated Diphenyl Ether in E-waste Dismantling Sites in Taizhou City, Zhejiang Province: Concentration, Distribution, and Migration Trend Title of translation:浙江省台州市电子垃圾拆解地多溴联苯醚浓度水平分布特征和迁移趋势 Authors:Wei, Bao-Kai (1); Liu, Chen (1); Wang, Ying (1); Jin, Jun (1, 2) Author affiliation:(1) College of Life and Environmental Sciences, Minzu University of China, Beijing; 100081, China; (2) Engineering Research Center for Food Environment and Health, Beijing; 100081, China Corresponding author:Jin, Jun(junjin3799@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4740-4748 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The concentration of polybrominated biphenyl ethers (PBDEs) in surface soil and atmosphere of e-waste dismantling sites in Taizhou city, Zhejiang Province was determined. The concentration ranges of ∑12PBDEs in surface soil of e-waste dismantling site, farmland, and resident areas in Fengjiang Town (FJ) and Binhai Town (BH) were 21.8-1 310 ng•g^-1 and 6.19-220 ng•g^-1, respectively. No significant difference was observed in the distribution of PBDEs between the FJ and BH soil. The concentration range of ∑12PBDEs in the atmosphere of FJ and BH were 262-3 240 pg•m^-3 and 840-2 990 pg•m^-3, respectively. The median levels of PBDEs in the atmosphere of FJ and BH were 1 410 pg•m^-3 and 840 pg•m^-3 in winter and 1 590 pg•m^-3 and 1 960 pg•m^-3 in summer, respectively. However, a significant difference was observed in the distribution of 11 PBDE congeners, except BDE-209, during winter and summer seasons. The migration trend analysis showed the differences between the soil and air of FJ and BH. The main migration trend of 3-5-BDEs was the volatilization from soil to atmosphere, and the increase in temperature promoted the volatilization of these PBDEs from soil to atmosphere in FJ. This indicated that the PBDEs in soil had become a major source of pollution emission and suggested that soil remediation should be carried out at the e-waste dismantling site and parts of farmland in FJ. Contrary to FJ, atmospheric deposition was the major migration trend of PBDEs and the soil was the main sink of PBDEs in BH. This indicated that e-waste dismantling site in BH could be a new source of PBDEs emission in this area.
© 2020, Science Press. All right reserved. Number of references:48 Main heading:Soil pollution Controlled terms:Electronic Waste - Ethers - Farms - Meteorological problems - Organic pollutants - Soil conservation - Soils - Wastes Uncontrolled terms:Atmospheric depositions - Concentration ranges - Pollution emissions - Polybrominated biphenyl ethers - Polybrominated diphenyl ether (PBDEs) - Soil remediation - Trend analysis - Zhejiang Province Classification code:443.1 Atmospheric Properties - 483.1 Soils and Soil Mechanics - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control DOI:10.13227/j.hjkx.202003188 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990503 Title:Response of Soil Respiration and Its Components to Nitrogen and Phosphorus Addition in Farming-Withdrawn Grassland in the Semiarid Loess Hilly-Gully Region Title of translation:黄土丘陵区退耕草地土壤呼吸及其组分对氮磷添加的响应 Authors:Zhou, Jun-Jie (1); Chen, Zhi-Fei (1); Yang, Quan (2); Lai, Shuai-Bin (1); Wang, Zhi (1, 2); Xu, Bing-Cheng (1, 2) Author affiliation:(1) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, 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 author:Xu, Bing-Cheng(Bcxu@ms.iswc.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:479-488 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Understanding the soil respiration characteristics in response to nitrogen and phosphorus addition in farming-withdrawn grasslands within semi-arid loess hilly-gully regions is of great importance for providing a theoretical basis for evaluating the effects of artificial regulation approaches on carbon cycling. We report on a field experiment that was undertaken from May to September 2018 in a farming-withdrawn grassland ecosystem in China, which is dominated by Stipa bungeana and Lespedeza davurica. Three different levels of nitrogen and phosphorus additions were used, including three main plots of N [0, 50, and 100 kg•(hm²•a)^-1] and three subplots of P (P2O5) [0,40, and 80 kg•(hm²•a)^-1]. The soil respiration rate, heterotrophic respiration rate, soil temperature, and soil moisture were measured monthly in each treatment. Results showed that N and P addition had no effect on soil temperature or moisture content (P>0.05). The soil respiration rate showed an obvious monthly variation and peaked in July. In the treatment without fertilizer addition, the monthly mean soil respiration rate, heterotrophic respiration rate, and autotrophic respiration rate were 0.69, 0.39, and 0.29 g•(m²•h)^-1, respectively. P addition had no significant effect on the soil respiration rate and its components without N addition (P>0.05). Under conditions of N addition, P addition significantly increased the soil respiration rate and its component (P<0.05). The monthly mean soil respiration rate, heterotrophic respiration rate, and autotrophic respiration rate were 0.93, 0.50, and 0.47 g•(m²•h)^-1, respectively. The Q10 (i.e., temperature sensitivity) values for soil respiration, heterotrophic respiration, and autotrophic respiration in unfertilized soil were 1.86, 2.36, and 2.24, respectively. The addition of N and P reduced the Q10 value of soil respiration and its components. Our findings suggest that the response of soil respiration and its two components to N and P addition in studied farming-withdrawn grassland in the semiarid loess hilly-gully region were closely related to their addition amounts.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Forestry Controlled terms:Ecosystems - Landforms - Nitrogen - Phosphorus - Sediments - Soil moisture - Temperature Uncontrolled terms:Autotrophic respiration - Grassland ecosystems - Heterotrophic respiration - Loess hilly gully region - Nitrogen and phosphorus - Soil respiration rates - Temperature sensitivity - Unfertilized soils Classification code:454.3 Ecology and Ecosystems - 481.1 Geology - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 641.1 Thermodynamics - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201906010 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408368650 Title:Relationship Between Diversity of Aquatic Plant Communities and Water Environmental Factors in Lhalu Wetland Title of translation:拉鲁湿地水生植物群落多样性与水环境因子的关系 Authors:Wang, Jia-Jun (1, 2, 3); Tian, Han-Xin (1, 2, 3); Zhou, Lei (1, 2, 3); Xu, De-Fu (1, 2, 3); Zhang, Jian-Wei (4); Pen, Cuo Ci-Ren (5) Author affiliation:(1) School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (2) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing; 210044, China; (3) Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing; 210044, China; (4) School of Mathematics and Statistics, Nanjing University of Information Science & Technology, Nanjing; 210044, China; (5) Lhalu Wetland National Nature Reserve, Lhasa; 850000, China Corresponding author:Xu, De-Fu(defuxu1@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1657-1665 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Plant diversity plays an important role in the integrity and stability of wetland ecosystems. Lhalu Wetland is the highest wetland in the world and is the largest urban natural swamp in China. It plays an important role in ecological balance, increasing air humidity, improving the urban climate, and purifying the water environment in Lhasa. The changes in plant diversity in different areas of the Lhalu Wetland and its relationship with water environmental factors were analyzed via field investigation, field monitoring, and indoor analysis. Results showed that 18 species of aquatic plants were found in the Lhalu Wetland. The Margalef species richness index was in the order M (Middle west)>W (West)>E (East)>N (North)>S (South). Index of species richness ranked of W (11), M (11)>N (8)>E (7)>S (6). Index of ShannonWiener followed that of M (1.9)>W (1.89)>S (1.63)>E (1.26)>N(1.18). Index of Simpson ranked of N (0.44)>E (0.34)>M (0.24)>S (0.21)>W (0.18). The order of Pielou index was that of S (0.91)>M(0.79)> W(0.78)> E(0.65)> N(0.56). Redundancy analysis showed that the diversity of aquatic plants in the Lhalu Wetland was affected by dissolved oxygen, pH, water temperature, total nitrogen, and turbidity. The dominant species in the Lhalu Wetland are CeratopHyllum demersum L., Hippuris vulgaris, Polygonum hydropiper, Softstem bulrush, Acorus calamus, and Juncus effusus, which show a trend of non-pollution-resistant species succession to pollution-resistant species.
© 2020, Science Press. All right reserved. Number of references:23 Main heading:Aquatic organisms Controlled terms:Biochemical oxygen demand - Dissolved oxygen - Pollution - Quality control - Redundancy - Water quality - Wetlands Uncontrolled terms:Aquatic plants - Ceratophyllum demersum - Diversity - Environmental factors - Field investigation - Polygonum hydropiper - Redundancy analysis - Redundancy analysis (RDA) Classification code:445.2 Water Analysis - 471 Marine Science and Oceanography - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.201910083 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517577 Title:Isolation, Identification, and Degrading Characteristics of an Oil Resistant Formaldehyde-Degrading Bacterium Title of translation:1株耐油甲醛降解菌的分离鉴定及降解特性 Authors:Han, Xi (1); Wang, Rong-Rong (1); Shi, Chun-Zhen (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Food Chain Pollution Control, College of Ecology and Environment, Beijing Technology and Business University, Beijing; 100048, China Corresponding author:Shi, Chun-Zhen(shichunzhen@btbu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5617-5627 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In recent years, the health risks of cooking oil fumes have been widely concerning. Since formaldehyde is one of the major pollutants emitted from cooking oil fumes, the degradation of formaldehyde should be investigated. Due to the advances and innovations in the degradation of pollutants, biodegradation was evaluated in this research. In this study, we screened out the strain of XF-1, which can degrade formaldehyde from cooking oil fume condensates. The strain of XF-1 was identified as Bacillus amyloliquefaciens sp. by a sequence analysis combing morphology, physiological, and biochemical experiments. The degrading characteristics of the strain were further studied. In the medium with a formaldehyde concentration of 100 mg•L^-1, the efficiency of XF-1 for degrading formaldehyde was 95.80% within 34 h. When the initial concentration of formaldehyde was <300 mg•L^-1, the XF-1 strain could completely degrade the formaldehyde within 120 h. When the formaldehyde concentration was 800 mg•L^-1, the degradation rate of the XF-1 strain reached 73.01% at 96 h. The maximum tolerated concentration of formaldehyde was 1 500 mg•L^-1. According to a single factor experiment (pH, inoculation amount, formaldehyde concentration, and temperature), the influence of each factor on the degradation of formaldehyde was studied. The optimal growth condition of the strain was 30℃ at pH 6 with an inoculum amount of 10%. The degradation specificity of formaldehyde was studied by comparing it with that of other bacillus species. The results showed that XF-1 strain was specific with regard to the function of degrading formaldehyde and was able to withstand a high oil environment. The maximum tolerable oil concentration of XF-1 was 900 g•L^-1. By analyzing the extracellular metabolites, it was determined that the metabolic pathway of formaldehyde degradation was the RuMP assimilation pathway. In this paper, a strain of formaldehyde degrading bacteria that was also resistant to oil was screened out and its metabolic mechanism was studied. The results indicated that the bacteria had broad application prospects in the treatment of formaldehyde emitted from cooking oil fumes.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Biodegradation Controlled terms:Bacteria - Bacteriology - Degradation - Formaldehyde - Fume control - Fumes - Health risks - Metabolism - Metabolites - Oils and fats - Petroleum prospecting - Ventilation exhausts Uncontrolled terms:Bacillus amyloliquefaciens - Biochemical experiments - Degradation of pollutants - Extracellular metabolites - Formaldehyde concentrations - Formaldehyde degradation - Maximum tolerated concentrations - Single-factor experiments Classification code:451.2 Air Pollution Control - 452.3 Industrial Wastes - 461.7 Health Care - 461.8 Biotechnology - 512.1.2 Petroleum Deposits : Development Operations - 619.1 Pipe, Piping and Pipelines - 802.2 Chemical Reactions - 804.1 Organic Compounds Numerical data indexing:Mass_Density 1.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 1.50e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 8.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 9.00e+02kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+01%, Percentage 7.30e+01%, Percentage 9.58e+01%, Time 1.22e+05s, Time 3.46e+05s, Time 4.32e+05s DOI:10.13227/j.hjkx.202003282 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658118 Title:Effects of Biochar Application on Soil Microbial Nutrient Limitations and Carbon Use Efficiency in Lou Soil Title of translation:施用生物炭对塿土土壤微生物代谢养分限制和碳利用效率的影响 Authors:Wang, Qiang (1); Geng, Zeng-Chao (1, 2); Xu, Chen-Yang (1, 2); Guo, Jing-Yu (1); Li, Qian-Qian (1); Liu, Li-Li (3); Zhao, Han-Hong (4); Du, Xu-Guang (5) Author affiliation:(1) Key Laboratory of Plant Nutrition and Agri-environment in Northwest China, College of Natural Resources and Environment, Northwest A&F University, Yangling; 712100, China; (2) Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing; 100081, China; (3) College of Forestry, Northwest A&F University, Yangling; 712100, China; (4) Rural Energy Workstation in Mianxian County, Hanzhong; 724200, China; (5) Agrotechnical Promotion Station in Mianxian Country, Hanzhong; 724200, China Corresponding author:Geng, Zeng-Chao(gengzengchao@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2425-2433 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Soil microbial metabolism is vital for nutrient cycling and stability of an ecosystem. To elucidate the long-term effects of biochar application on nutrient limitations and carbon use efficiency (CUE) of soil microbial metabolisms, biochars pyrolyzed at 450℃ from trunks and branches of fruit trees under an oxygen-limited condition were mixed with the top Lou soils (0-20 cm) with application amounts of 0, 20, 40, 60, and 80 t•hm^-2 in 2012. Corn-wheat rotation was carried out afterwards for seven years. The nutrient limitations of soil microbial metabolisms were analyzed quantitatively through ecoenzymatic stoichiometry in 2019. The results indicated that: ① With an increase in the biochar application amount, soil moisture, organic carbon, total nitrogen, C:N, C:P, and N:P significantly increased, whereas there were no clear patterns for the active components of carbon, nitrogen, and phosphorus, microbial biomass carbon, nitrogen, phosphorus and total phosphorus. In contrast, the activities of five extracellular enzymes (β-1,4-glucosidase, cellobiohydrolase, leucine aminopeptidase, β-1,4-N-acetylglucosaminidase, and phosphatase) were significantly reduced. ② The soil microorganisms suffered from the phosphorus limitation under all treatments in this study. In the treatments of biochar application, the carbon and phosphorus limitations of microbial metabolisms increased significantly with increasing application amount, whereas the microbial CUE decreased significantly. When the application amount was 20 t•hm^-2, the carbon limitation (0.625±0.022) and phosphorus limitation (62.153°±0.892°) were lowest, and the microorganism CUE (0.511±0.007) was highest. ③ Partial least-squares path modeling (PLS-PM) showed that soil carbon, nitrogen, phosphorus, and their stoichiometry had a very direct positive effect on phosphorus limitation (P<0.01), and there was a positive correlation between carbon limitation and phosphorus limitation (R²=0.242, P<0.001); in contrast, the carbon and phosphorus limitations had a very significant negative effect on CUE (P<0.001). It was revealed that the excessive application of biochar had caused a soil element stoichiometry imbalance, which deteriorated the phosphorus limitation of the soil microbial metabolism and further led to carbon limitation and reduction of CUE. When the biochar application amount was 20 t•hm^-2, C and P limitations were lowest, and microbial CUE was highest. Therefore, 20 t•hm^-2 was optimal for regulating soil microbial metabolism, maintaining ecological functions, and reducing carbon dioxide emission produced by microbial metabolism.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Metabolism Controlled terms:Carbon dioxide - Ecology - Efficiency - Enzymes - Global warming - Least squares approximations - Microorganisms - Nitrogen - Nutrients - Orchards - Organic carbon - Phosphorus - Soil moisture - Stoichiometry Uncontrolled terms:Carbon dioxide emissions - Carbon use efficiencies - Extracellular enzymes - Leucine aminopeptidase - Microbial biomass carbon - Partial least square (PLS) - Phosphorus limitation - Positive correlations Classification code:443.1 Atmospheric Properties - 454.3 Ecology and Ecosystems - 461.9 Biology - 483.1 Soils and Soil Mechanics - 801.4 Physical Chemistry - 804 Chemical Products Generally - 821.3 Agricultural Methods - 913.1 Production Engineering - 921.6 Numerical Methods Numerical data indexing:Size 0.00e+00m to 2.00e-01m DOI:10.13227/j.hjkx.201911062 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517588 Title:Enhancing PPCPs Removal and Membrane Fouling Control of Ultrafiltration Membrane by UiO-66@Fe3O4@UiO-66 Title of translation:超滤膜负载UiO-66@Fe3O4@UiO-66强化PPCPs去除和膜污染控制 Authors:Yin, Yue (1); Wu, Dao-Wen (1); Sun, Meng-Yao (1); Lü, Lu (1, 2, 3, 4); Zhang, Wei-Ming (1, 2, 3, 4) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China; (2) Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing; 210023, China; (3) State Environmental Protection Engineering Center for Organic Chemical Wastewater Treatment and Resource Reuse, Nanjing; 210046, China; (4) Nanjing University-International Research Institute of Environmental Industries, Changzhou; 213125, China Corresponding author:Zhang, Wei-Ming(wmzhang@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5500-5508 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Pharmaceuticals and personal care products (PPCPs) adsorption and membrane fouling control were realized by a polyvinylidene fluoride (PVDF) membrane loaded with multifunctional metal-organic frameworks (MOFs) in this study. During adsorption, the multifunctional MOFs UiO-66@Fe3O4@UiO-66 in the mixed-matrix membrane (MMMs) could adsorb two typical PPCPs, salicylic acid (SA), and dimethyl phthalate (DMP), efficiently. In the membrane catalytic regeneration process, Fe3O4 in UiO-66@Fe3O4@UiO-66 could catalyze H2O2 to generate hydroxyl radicals (HO•), coupling MOFs/PVDF adsorption capacity regeneration and membrane cleaning. The results show that 10%MOFs/PVDF exhibits the highest adsorption efficiency for 0.1 mmol•L^-1 SA and DMP under neutral conditions, and the removal rate reached 64.2% and 46.1%, respectively. Additionally, the pure water flux and membrane adsorption capacity of 10%MOFs/PVDF were able to recover about 91.8% and 94.2%, respectively, using 5 mmol•L^-1 H2O2. In this research, the main characteristic of MOFs/PVDF is coupling of the membrane adsorption capacity regeneration and membrane fouling control process. This provides new ideas for the removal of PPCPs and the improvement of membrane anti-fouling performance during the deep purification of secondary effluent.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Membranes Controlled terms:Adsorption - Effluents - Fluorine compounds - Iron oxides - Magnetite - Membrane fouling - Metal-Organic Frameworks - Organometallics - Process control - Salicylic acid Uncontrolled terms:Adsorption capacities - Adsorption efficiency - Catalytic regenerations - Metalorganic frameworks (MOFs) - Mixed matrix membranes - Pharmaceuticals and personal care products - Polyvinylidene fluoride membranes - Ultra-filtration membranes Classification code:452.3 Industrial Wastes - 802.3 Chemical Operations - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 4.61e+01%, Percentage 6.42e+01%, Percentage 9.18e+01%, Percentage 9.42e+01% DOI:10.13227/j.hjkx.202006025 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509104964 Title:Response of Soil Bacterial Community Structure to Precipitation Change in Grassland of Loess Plateau Title of translation:黄土高原草地土壤细菌群落结构对于降水变化的响应 Authors:Li, Na (1); Wang, Bao-Rong (2, 3); An, Shao-Shan (1, 3); Jiao, Feng (1); Huang, Qian (4) Author affiliation:(1) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling; 712100, China; (2) State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling; 712100, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) College of Resources and Environment, Northwest A&F University, Yangling; 712100, China Corresponding author:An, Shao-Shan(shan@ms.iswc.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4284-4293 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As the main participants of ecosystem functions, the response of microorganisms to variations in soil moisture caused by the changes in precipitation amounts should be quantified to evaluate the impact of climate change on semi-arid ecosystems. For this purpose, a two-year simulation of the changes in the rainfall patterns was conducted on the Loess Plateau, and five precipitation treatments (80% and 40% decrease in precipitation, D80, D40; natural precipitation, NP; 40% and 80% increase in precipitation, I40, I80) were set up. The results showed that: ① Compared with NP, the carbon-to-nitrogen ratio (C/N) was lower in DP80 or IP80, while it reached the maximum value in I40. The mean C/N value of the 0-20 cm soil layer was 10.76. The microbial biomass carbon to microbial biomass nitrogen ratio (MBC/MBN) varied significantly with the soil layer in the treatments of D80 and I80, and the maximum value was 14.15 in D80. ② In the grassland soil naturally growing on the Loess Plateau, at the phylum level, the dominant phyla were Actinobacteria, Proteobacteria, Chloroflexi, and Acidobacteria. At the class level, Actinobacteria, Acidobacteria, α-Proteobacteria, and Thermomicrobia were predominant. ③ RDA analysis showed that changes in soil dissolve organic carbon (DOC), dissolved organic nitrogen (DON), elemental carbon (EC), and pH values were the main factors affecting the distribution of soil bacteria under the five precipitation treatments in the study area. Overall, 80% increase or decrease in precipitation has a significant impact on soil active organic carbon content and bacterial abundance, especially D80. In conclusion, drought or extreme precipitation may considerably change the active organic matter content and bacterial community diversity and abundance in the soils of the Loess Plateau.
© 2020, Science Press. All right reserved. Number of references:46 Main heading:Precipitation (meteorology) Controlled terms:Bacteria - Climate change - Ecosystems - Landforms - Nitrogen - Organic carbon - Sediments - Soil moisture Uncontrolled terms:Carbon-to-nitrogen ratio - Dissolved organic nitrogen - Extreme precipitation - Microbial biomass carbon - Organic carbon contents - Organic matter content - Precipitation change - Soil bacterial community Classification code:443.1 Atmospheric Properties - 443.3 Precipitation - 454.3 Ecology and Ecosystems - 481.1 Geology - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds Numerical data indexing:Percentage 4.00e+01%, Percentage 8.00e+01%, Size 0.00e+00m to 2.00e-01m DOI:10.13227/j.hjkx.201912175 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256465 Title:Assessment of Emergency Emission Reduction Effect During the Heavy Air Pollution Episodes in Beijing, Tianjin, Hebei, and Its Surrounding Area("2+26" Cities) from October to December 2019 Title of translation:2019年10~12月京津冀及周边"2+26"城市重污染减排效果评估 Authors:Zhu, Yuan-Yuan (1, 2); Gao, Yu-Xiao (1); Wang, Wei (1); Lu, Ning (1); Xu, Rong (1); Liu, Bing (1); Li, Jian-Jun (1) Author affiliation:(1) China National Environmental Monitoring Centre, Beijing; 100012, China; (2) School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing; 100083, China Corresponding author:Gao, Yu-Xiao(gaoyx@cnemc.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4402-4412 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To evaluate the effect of emergency emission reduction measures during the heavy air pollution episodes in Beijing, Tianjin, Hebei, and its surrounding areas, a scenario simulation method was used. The concentrations of PM2.5, PM10, SO2, NO2, CO, and O3-8h, air quality index (AQI), characteristics of heavy air pollution, and climate and meteorological factors were analyzed using the observation data available from October to December 2019. The 24 h, 72 h, and 144 h prediction results of NAQPMS model were analyzed. The uncertainties of the assessment and model prediction were discussed. The results showed that the average PM2.5 concentration in Beijing, Tianjin, and its surrounding 26 cities ("2+26" cities) from October to December 2019 was 64 μg•m^-3, indicating a decrease of 10 μg•m^-3 as compared with that during the same period in 2018. There were 4 occurrences of regional heavy air pollution episodes, with the average PM2.5 concentration of 156 μg•m^-3 of affected cities. The value of evaluation on meteorological condition index of PM2.5 pollution (EMI) of "2+26" cities ranged from -15.6%-16.8%. The meteorological conditions of 12 cities, including Beijing, Tianjin, and Shijiazhuang, deteriorated as compared with those during the same period in 2018, and the changes ranged from 3.2%-16.8%. However, the emergency emission reduction measures effectively reduced the occurrence of regional heavy air pollution episodes, the peak concentration of PM2.5 was decreased significantly, and no severe regional pollution episode occurred. The daily PM2.5 concentrations reduced by 2% to 9% in Beijing, Shijiazhuang, Baoding, Tangshan, and other cities during a typical heavy air pollution period. The quarterly average concentrations of PM2.5 in the "2+26" cities reduced by 1 to 3 μg•m^-3. The regional emergency emission reduction measures have played an active role in protecting the health of the people and improving the quality of ambient air.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Emission control Controlled terms:Air quality - Sulfur dioxide Uncontrolled terms:Air pollution episodes - Air quality indices - Average concentration - Meteorological condition - Meteorological factors - Peak concentrations - PM2.5 concentration - Scenario simulations Classification code:451.2 Air Pollution Control - 804.2 Inorganic Compounds Numerical data indexing:Percentage 2.00e+00% to 9.00e+00%, Percentage 3.20e+00% to 1.68e+01%, Time 2.59e+05s, Time 5.18e+05s, Time 8.64e+04s, Percentage -1.56e+01% to 1.68e+01% DOI:10.13227/j.hjkx.202003198 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990485 Title:Driving Factors of the Significant Increase in Surface Ozone in the Beijing-Tianjin-Hebei Region, China, During 2013-2018 Title of translation:京津冀地区城市臭氧污染趋势及原因探讨 Authors:Yu, Yi-Jun (1, 2); Meng, Xiao-Yan (3); Wang, Zhen (2); Zhou, Wei (2); Yu, Hong-Xia (1) Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China; (2) Changzhou Environmental Monitoring Center, Changzhou; 213001, China; (3) China National Environmental Monitoring Center, Beijing; 100012, China Corresponding author:Meng, Xiao-Yan(mengxy@cnemc.cnemailyuhx@nju.edu.cn)Yu, Hong-Xia(yuhx@nju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:106-114 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Photochemical pollution, which is believed to be influenced by emission changes and meteorological factors, is presently quite serious in the Beijing-Tianjin-Hebei (BTH) region, China. There is a need to ascertain the effectiveness of air quality management in the region based on long-term air quality trends independent from meteorological influences. We apply Kolmogorov-Zurbenko (KZ) filtering, a technique used to separate different scales of motion in a time series, to analyze the time series of the maximum daily 8-hour running average for ozone (O3-8h) from 13 cities in the BTH region during 2013-2018, and also discuss trends and driving factors. Results of the KZ filtering revealed that the short-term, seasonal, and long-term components of the O3-8h accounted for 32.7%, 63.9%, and 3.4% of the total variance, respectively. The long-term component of the BTH region was much higher than of those reported by others for Berlin, Paris, and London, and was comparable to that of Los Angeles in the early 1990s and in the 4 years previous to our study. Although we found a lower long-term component than of those reported for Shanghai and Nanjing in the Yangtze River Delta, China, the BTH region had higher rates of increase that ranged from 2.31 to 7.12 μg•(m³•a)^-1 [mean 4.97 μg•(m³•a)^-1]. Based on the linear fitting results-that had not been verified by experiments or model simulations-the average increase rates could be mainly attributed to emission changes (90.4%), which may be distinguished into two parts, the decrease of particulate matter (PM) (27.3%) and the emission of O3 precursors (63.1%). Decreases of PM2.5in Beijing, Langfang, Tianjin, and Hengshui were considered to be responsible for the increase at the levels of 50.8%, 32.5%, 36.7%, and 48.6%, respectively. This suggests that the rapid decrease in PM2.5could be the most important factor in the increasing trend of O3 in some cities. We conclude that further decreases in the emission of O3 precursors are required to overcome the effect of decreasing PM2.5 causing an increase in O3.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Quality management Controlled terms:Air quality - Computational complexity - Ozone - River pollution - Time series Uncontrolled terms:Air quality trends - Beijing-tianjin-hebei regions - Meteorological factors - Meteorological influence - Model simulation - Particulate Matter - Photochemical pollution - Yangtze river delta Classification code:451.2 Air Pollution Control - 453 Water Pollution - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 804 Chemical Products Generally - 912.2 Management - 922.2 Mathematical Statistics Numerical data indexing:Age 4.00e+00yr, Percentage 2.73e+01%, Percentage 3.25e+01%, Percentage 3.27e+01%, Percentage 3.40e+00%, Percentage 3.67e+01%, Percentage 4.86e+01%, Percentage 5.08e+01%, Percentage 6.31e+01%, Percentage 6.39e+01%, Percentage 9.04e+01%, Time 2.88e+04s DOI:10.13227/j.hjkx.201905222 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371122 Title:Effect of Adding Granular Activated Carbon (GAC)/Manganese Dioxide (MnO2) for the Anaerobic Digestion of Waste Activated Sludge Title of translation:投加颗粒活性炭和二氧化锰对剩余污泥厌氧消化的影响 Authors:Yang, Bo (1, 2); Jia, Li-Juan (1, 2); Xu, Hui (1, 2); Li, Fang (1, 2); Liu, Yan-Biao (1, 2) Author affiliation:(1) State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai; 201620, China; (2) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1816-1824 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The addition of conductive materials or metal oxide nanoparticles to an anaerobic system is an attractive strategy to enhance anaerobic digestion. The effect of granular activated carbon (GAC) and/or manganese dioxide (MnO2) on waste activated sludge (WAS) anaerobic digestion was investigated by batch experiments. The experiments were provided in control, GAC, MnO2, and GAC/MnO2 groups, which were named R0, R1, R2, and R3, respectively. The sludge characteristics, microbial activity, and microbial community structure were systematically investigated. Results showed that CH4 yield rate was evidently increased by 68.18% and 51.35% in R1 and R3, respectively, whereas the cumulative CH4 production decreased by 21.25% in R2, compared with R0. Moreover, the fermentation process could be promoted with the addition of GAC and/or MnO2. The phosphate precipitation generated by Mn²⁺ and phosphate released from WAS blocked the anaerobic metabolic channel and then decreased the production of CH4 in R2. The increase in CH4 yield rate in R3 was mainly attributed to the conductivity and adsorption of GAC and the catalysis of MnO2. Additionally, the microbial activity could be promoted with the addition of GAC, MnO2, and GAC/MnO2 in anaerobic digestion. Microbial community structure analysis showed that the abundance of the Methanobacterium and Methanosaeta increased with the addition of GAC and MnO2, which could enhance the interspecies electron transfer between fermenting bacteria and methanogens and boost fermentation and CH4 production.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Anaerobic digestion Controlled terms:Activated carbon - Conductive materials - Electron transitions - Fermentation - Granular materials - Manganese oxide - Metal nanoparticles - Metals - Microorganisms - Sludge digestion Uncontrolled terms:Electron transfer - Granular activated carbons - Manganese dioxide - Microbial community structures - Waste activated sludges Classification code:452.2 Sewage Treatment - 461.9 Biology - 708.2 Conducting Materials - 761 Nanotechnology - 804 Chemical Products Generally - 951 Materials Science Numerical data indexing:Percentage 2.12e+01%, Percentage 5.14e+01%, Percentage 6.82e+01% DOI:10.13227/j.hjkx.201910019 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990489 Title:Exhaust Smoke of Non-Road Vehicles in Typical Cities of Eastern China Title of translation:华东典型城市非道路移动机械排气烟度 Authors:Lu, Jun (1); Hu, Qing-Yao (1); Yang, Qiang (2); Tang, Wei (2); Xia, Yang (2); Jing, Bao-Li (2); Chen, Yun (3); Huang, Cheng (1) Author affiliation:(1) State Environmental Protection Key Laboratory of the Cause and Protection of Urban Air Pollution Complex, Shanghai Academy of Environmental Science, Shanghai; 200233, China; (2) Hangzhou Academy of Environmental Science, Hangzhou; 310014, China; (3) Hangzhou Motor Vehicle Exhaust Pollution Management Office, Hangzhou; 310014, China Corresponding author:Huang, Cheng(huangc@saes.sh.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:133-138 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In typical cities of East China, more than 900 non-road vehicles were tested for exhaust smoke. Based on the investigation of the properties of these non-road vehicles, exhaust smoke intensities for different kinds of non-road vehicles are recommended. We also quantitatively study the differences in smoke intensity among vehicle age, vehicle power, test conditions, and fuels. The results showed that smoke intensity of non-road vehicles was (1.02±0.57) m^-1and that Ringelmann smoke was 2.10±0.19. In comparison to Chinese national standard (GB 36886), approximately 12%-25% of tested non-road vehicles' smoke intensity exceeded the standard limit. The smoke intensity of 80% of tested non-road vehicles was higher during start-up than under free acceleration. In comparison to ordinary diesel, the smoke intensities of tested non-road vehicles that used automotive diesel were lower. The instantaneous increase in fuel injection during start-up, as well as poor fuel quality, can directly affect the exhaust smoke of non-road vehicles.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Road vehicles Controlled terms:Diesel engines - Direct injection - Fuels - Roads and streets - Smoke Uncontrolled terms:Chinese national standard - East China - Eastern China - Exhaust smoke - Fuel quality - Smoke intensity - Test condition - Vehicle age Classification code:406.2 Roads and Streets - 521 Fuel Combustion and Flame Research - 612.2 Diesel Engines Numerical data indexing:Percentage 1.20e+01% to 2.50e+01%, Percentage 8.00e+01% DOI:10.13227/j.hjkx.201906212 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106422 Title:Ecological Risk Assessment of Heavy Metals at Township Scale in the High Background of Heavy Metals, Southwestern, China Title of translation:基于乡镇尺度的西南重金属高背景区土壤重金属生态风险评价 Authors:Zhang, Fu-Gui (1, 2, 3, 4); Peng, Min (1, 2, 3); Wang, Hui-Yan (1, 2, 3); Ma, Hong-Hong (1, 2, 3); Xu, Ren-Ting (1, 2, 3); Cheng, Xiao-Meng (1, 2, 3); Hou, Zhao-Lei (5); Chen, Zi-Wan (4, 5); Li, Kuo (1, 2, 3); Cheng, Hang-Xin (1, 2, 3) Author affiliation:(1) Research Center of Geochemical Survey and Assessment on Land Quality, China Geological Survey, Langfang; 065000, China; (2) Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang; 065000, China; (3) Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earth's Critical Zone, China Geological Survey, Langfang; 065000, China; (4) College of Earth Sciences, Chengdu University of Technology, Chengdu; 610059, China; (5) Yunnan Institute of Geological Survey, Kunming; 650216, China Corresponding author:Peng, Min(pengmin@igge.cnemailchenghangxin@igge.cn)Cheng, Hang-Xin(chenghangxin@igge.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4197-4209 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Heavy metals (HMs) are naturally occurring elements that have high natural background levels in the environment. Therefore, it is important to conduct ecological risk assessment and identify potential sources of HMs. In the past, studies were conducted at the regional scale. The accuracy of those studies could not meet the needs of spatial planning and natural resource management. Therefore, it is necessary to conduct ecological risk assessment at the township scale. In this study, 1092 soil samples (from 0-20 cm depth) were collected in the town of Reshui, an area with high background levels of soil HMs with the parent material of carbonatite, which is commonly found in Southwest China. The town of Reshui is a multi-ecological risk superimposed area where the ecological risk is high. In this study, concentrations of HMs (Cd, Cr, As, Hg, Pb, Cu, Zn, and Ni) in the topsoil were analyzed, and statistical analysis (SA), geographic information system (GIS) modeling, and positive matrix factorization (PMF) analysis were performed. The geoaccumulation index (Igeo) and potential ecological risk index (PERI) were applied for the ecological risk assessment and quantification of the sources of the soil HMs. The mean values of HM concentrations in the topsoil were 18.1, 1.18, 174.1, 202.2, 0.09, 71.1, 34.9, and 167.2 mg•kg^-1for As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn, respectively, which were considerably higher than the average background value (ABV) in soils in Yunnan Province except for As and Pb. The average concentrations of Cd, Cr, Cu, and Ni exceeded the screening values specified in the soil contamination risk in agricultural land (GB 15618-2018) by 5.82, 1.16, 4.04, and 1.02 times, respectively. The Igeo value shows that the major pollutant is Cu in the surface soil of the study area, followed by Cr, and Cd. Speciation analysis of HMs indicates that HMs (Cr, As, Pb, Cu, Zn, and Ni) mainly exist in the residual form, mostly from the geological background with low bioavailability. The potential effective components of Hg have higher levels, but the total amount of Hg and its pollution risk are lower. Cd has a high bioavailability ratio, is easy to enter the soil solution and be absorbed by crops, and is the HM with the highest pollution risk in the study area. The PERI shows that the proportions of low ecological risk, moderate risk, and high risk soil samples are 44.23%, 54.40%, and 1.37% of the total number of samples, respectively. Hg and Cd were the major sources of risk because of their high toxicity coefficient. The PMF analysis indicates that there are four major sources of HMs in the study area: human activity, natural sources, coal mining and traffic emissions, and agricultural sources with the risk contribution ratios of 9.29%, 53.67%, 11.23%, and 25.81%, respectively. The PMF analysis effectively quantified the ecological risk from these sources, providing a reference for further pollution control and prevention measures.
© 2020, Science Press. All right reserved. Number of references:74 Main heading:Soil pollution Controlled terms:Agricultural robots - Agriculture - Biochemistry - Coal industry - Factorization - Heavy metals - Metal analysis - Natural resources management - Pollution control - Risk assessment - Soil moisture - Soil surveys Uncontrolled terms:Average concentration - Ecological risk assessment - Geo-accumulation index - Natural background levels - Natural resource management - Pollution control and prevention - Positive Matrix Factorization - Potential ecological risk Classification code:483.1 Soils and Soil Mechanics - 503 Mines and Mining, Coal - 524 Solid Fuels - 531 Metallurgy and Metallography - 801.2 Biochemistry - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 1.12e+01%, Percentage 1.37e+00%, Percentage 2.58e+01%, Percentage 4.42e+01%, Percentage 5.37e+01%, Percentage 5.44e+01%, Percentage 9.29e+00%, Size 0.00e+00m to 2.00e-01m DOI:10.13227/j.hjkx.201912241 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861862 Title:Combined Effects of Erythromycin and Nutrients on Microalgae in Seawater Title of translation:海水中的红霉素与营养盐对微藻的复合影响 Authors:Wang, Na (1, 2, 3); Zhao, Wei-Hong (2, 3, 4); Miao, Hui (4) Author affiliation:(1) Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao; 266071, China; (2) Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266237, China; (3) College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Institute of Oceanology, Chinese Academy of Sciences, Qingdao; 266071, China Corresponding author:Zhao, Wei-Hong(whzhao@qdio.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3257-3265 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A large number of antibiotics and their metabolites eventually enter the ocean, and their potential threat to marine ecosystems demands attention. In this study, Karenia mikimotoi, Prorocentrum donghaiense, and Skeletonema costatum were selected to investigate the effects of different concentrations of erythromycin and nutrients on microalgae biomass, photosynthetic pigment contents, protein contents, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content. The possibility of whether erythromycin and nutrient limitation can have combined effects on microalgae was explored, and under different nutritional conditions, the impact of erythromycin on marine ecology was evaluated. The study found that nutrient limitation reduces the tolerance of Karenia mikimotoi, Prorocentrum donghaiense, and Skeletonema costatum to erythromycin. Erythromycin in the experimental range (0-1000 μg•L^-1) had no significant effect on the growth of Karenia mikimotoi. However, high concentrations of erythromycin (≥100 μg•L^-1)significantly inhibited the growth of Prorocentrum donghaiense and Skeletonema costatum. The sensitivity of Skeletonema costatum was the most pronounced.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Nutrients Controlled terms:Algae - Antibiotics - Ecosystems - Enzymes - Metabolites - Microorganisms - Seawater effects Uncontrolled terms:Nutrient limitations - Nutritional conditions - Photosynthetic pigment contents - Potential threats - Prorocentrum donghaiense - Protein contents - Skeletonema costatum - Superoxide dismutase activities Classification code:454.3 Ecology and Ecosystems - 461.6 Medicine and Pharmacology - 461.9 Biology - 471.4 Seawater, Tides and Waves Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 1.00e-03kg/m3 DOI:10.13227/j.hjkx.201911242 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809952732 Title:Source of Groundwater Nitrate in Luanping Basin Based on Multi-environment Media Nitrogen Cycle and Isotopes Title of translation:基于多环境介质氮素和同位素的滦平盆地地下水硝酸盐来源示踪 Authors:Sun, Hou-Yun (1, 2); Wei, Xiao-Feng (2); Jia, Feng-Chao (2); D.-J., Li; J., Li; X., Li; Z.-Q., Yin Author affiliation:(1) School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing; 100083, China; (2) Beijing Institute of Geology for Mineral Resources, Beijing; 100012, China; (3) China Institute of Geo-Environment Monitoring, Beijing; 100081, China Corresponding author:Wei, Xiao-Feng(yanchixiaowei@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4936-4947 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The multi-environment media of water, surface soil and vadose zone soil samples were collected in the upstream of Miyun Reservoir, in the Luanping Basin of Chengde City, Hebei Province. The aim was to identify the pollution source, ratio, spatial distribution, migration, and transformation characteristics of nitrogen in groundwater. Hydrogeochemistry, soil total nitrogen, and dissolved nitrate nitrogen of vadose zone soil analysis and a multi isotope tracer technique of δ¹⁵N-NO3 and δ¹⁸O-NO3, δ³⁴S-SO4 and δ¹⁸O-SO4, δ¹⁴C, combined with land-use type analysis and geostatistics, were used in the study. The results showed that nitrate was the main form of nitrogen in the groundwater of the Luanping Basin. The NO3^- concentration of groundwater was significantly correlated with the land-use types of residential land and cultivated land where the nitrate pollution of shallow groundwater was mainly distributed. Of the groundwater samples, 13.79% exceeded the National Standard III for Groundwater (GB/T 14848-2017) of NO3^- concentration value, while the excess multiple was 1.04-3.86, and 37.93% of the groundwater samples exceeded the World Health Organization NO3^- concentration standard value. The excess multiple was 1.08-6.83. The spatial variation of groundwater NO3^- concentration, soil total nitrogen and surface soil dissolved nitrate nitrogen of vadose zone was affected by the combination of natural structural factors and anthropogenic factors. The source of groundwater nitrate was mainly from livestock manure and domestic sewage, followed by chemical fertilizer leaching. The nitrogen cycle in the aeration zone-groundwater-dominated nitrogen circulation in the groundwater runoff area of the piedmont basin was nitrification. These findings are highly significant for the prevention and remediation of groundwater pollution when viewing the basin system as an independent unit, and for studying the sources and fate of nitrate pollution in the water environment.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Groundwater pollution Controlled terms:Agriculture - Fertilizers - Groundwater - Hydrochemistry - Isotopes - Land use - Nitrates - Reservoirs (water) - Sewage - Soils - Water aeration Uncontrolled terms:Anthropogenic factors - Chemical fertilizers - Concentration values - Groundwater nitrates - Hydro geochemistries - Isotope-tracer techniques - Soil total nitrogen - World Health Organization Classification code:403 Urban and Regional Planning and Development - 441.2 Reservoirs - 444.2 Groundwater - 445.1 Water Treatment Techniques - 452.1 Sewage - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 1.38e+01%, Percentage 3.79e+01% DOI:10.13227/j.hjkx.202004142 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796207 Title:Chemical Characteristics and Sources of Volatile Organic Compounds in Shanghai During an Ozone and Particulate Pollution Episode in May 2019 Title of translation:2019年5月上海复合污染过程中挥发性有机物的污染特征及来源 Authors:Wang, Qian (1) Author affiliation:(1) State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China Corresponding author:Wang, Qian(wangqian0606@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2555-2564 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In the urban area of Shanghai during the complex pollution episode, ozone and PM2.5 were continuously measured from May 1 to May 28, 2019. The characterization of volatile organic compounds (VOCs) and their relationship with secondary formation were studied. The results show that in May 2019, there were four different ozone and PM2.5 pollution processes in Shanghai. The combined pollution of PM2.5 and ozone that occurred under the meteorological conditions of average temperature of approximately 26℃ and relative humidity of approximately 40% was analyzed. The photochemical consumption of VOCs was significantly positively correlated with the maximum net growth of O3 and there was a significant positive correlation between SOAP and PM2.5. The key reactive species of VOCs that significantly contribute to ozone generation were m, p-xylene, ethylene, toluene, propylene, and o-xylene. The key reactive species that significantly contribute to secondary organic aerosols (SOA) were toluene, m, p-xylene, ethylbenzene, o-xylene, and 1, 2, 3-trimethylbenzene.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Air pollution Controlled terms:Ethylene - Ozone - Particles (particulate matter) - Toluene - Volatile organic compounds - Xylene Uncontrolled terms:1 ,2 ,3-trimethylbenzene - Chemical characteristic - Combined pollutions - Meteorological condition - Particulate pollution - Pollution episodes - Positive correlations - Secondary organic aerosols Classification code:451 Air Pollution - 804 Chemical Products Generally - 804.1 Organic Compounds - 951 Materials Science Numerical data indexing:Percentage 4.00e+01% DOI:10.13227/j.hjkx.201907115 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796257 Title:Effect of Water-Fertilizer-Gas Coupling on Soil N2O Emission and Yield in Greenhouse Tomato Title of translation:水肥气耦合对温室番茄地土壤 N2O排放及番茄产量的影响 Authors:Shang, Zi-Hui (1, 2); Cai, Huan-Jie (1, 2); Chen, Hui (1, 2); Sun, Ya-Nan (1); Li, Liang (1, 2); Zhu, Yan (1, 2); Wang, Xiao-Yun (1) Author affiliation:(1) College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling; 712100, China; (2) Key Laboratory of Agricultural Water and Soil Engineering, Ministry of Education, Northwest A&F University, Yangling; 712100, China Corresponding author:Cai, Huan-Jie(caihj@nwsuaf.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2924-2935 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To reveal the effect of water, fertilizer, and gas coupling on soil N2O emissions in greenhouse tomato soil and suggest appropriate measures for increasing yield and reducing N2O emissions, static chamber-gas chromatography was used to study the effects of soil N2O emissions. The variation laws of soil temperature, water-filled pore space (WFPS), NO3^--N content, and O2 content and the influence mechanism of N2O emission under the condition of water-fertilizer-gas coupling were analyzed. Aerated conditions comprised two water levels, 0.6 W and 1.0 W (representing 40% deficit irrigation and full irrigation, W represents when sufficient irrigation water was available), and three nitrogen levels (120 kg•hm^-2, 180 kg•hm^-2, and 240 kg•hm^-2, representing low, medium, and high nitrogen, respectively, with 50%F, 75%F, and F, F is the recommended amount of nitrogen application locally). Three levels of fertilization were used as controlled unaerated full irrigation (O representing aeration, and CK representing conventional drip irrigation). Nine treatments were designed in the experiment. The results showed that the tomato field cumulative emission of N2O under full irrigation (W2F1O, W2F2O, and W2F3O) increased by an average of 55.7% compared with the corresponding treatment at W1 level (P<0.05). The N2O emissions of W1F3O, W2F3O, and W2F3CK fields significantly increased by 13.4% and 43.8% compared with medium nitrogen W1F2O, W2F2O, and W2F2CK and low nitrogen W1F1O, W2F1O, and W2F1CK treatments, respectively (P<0.05).Compared with the corresponding unaerated full irrigation, the emissions (W2F1O, W2F2O, and W2F3O) significantly increased by 11.2% (P<0.05). Aeration, the increase of nitrogen rate, and irrigation amount resulted in the increment of tomato yield and yield-scaled N2O emissions. Compared with medium nitrogen, the yield and yield-scaled N2O emission of high nitrogen treatment increased by 12.5% (P<0.05) and 3.9% (P>0.05), respectively. Compared with low nitrogen treatment, the yield and yield-scaled N2O emission of high nitrogen treatment increased by 30.4% and 9.6% (P<0.05), respectively. The yield and yield-scaled N2O emissions of aerated full irrigation significantly increased by 29.7% and 18.7%, respectively, compared with aerated deficient irrigation. Compared with unaerated irrigation treatment, the yield under aerated treatment increased by 10.4% (P<0.05), and the yield-scaled N2O emission increased by 3.9% (P>0.05). Under the conditions of increasing irrigation water, decreasing fertilizer application, and aeration, partial factor productivity, and irrigation water use efficiency (IWUE) can be significantly increased. After comprehensive consideration of cumulative N2O emissions, tomato production, nitrogen fertilizer utilization efficiency, IWUE, and yield-scaled N2O emission, it can be concluded that aerated low nitrogen full irrigation is an optimal management mode. The results provide reference for increasing yield and reducing emissions of greenhouse tomato.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Nitrogen fertilizers Controlled terms:Efficiency - Fruits - Gas chromatography - Gas emissions - Greenhouse effect - Greenhouses - Soils - Subirrigation - Water levels - Water supply Uncontrolled terms:Cumulative emissions - Deficient irrigation - Fertilizer applications - Irrigation treatments - Irrigation water use efficiency - Partial factor productivity - Utilization efficiency - Water-filled pore space Classification code:446.1 Water Supply Systems - 451 Air Pollution - 483.1 Soils and Soil Mechanics - 802.3 Chemical Operations - 804 Chemical Products Generally - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 913.1 Production Engineering Numerical data indexing:Percentage 1.34e+01%, Percentage 1.87e+01%, Percentage 2.97e+01%, Percentage 3.04e+01%, Percentage 4.00e+01%, Percentage 4.38e+01%, Percentage 5.57e+01%, Power 1.00e+00W, Power 6.00e-01W DOI:10.13227/j.hjkx.201910056 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796165 Title:Seasonal Variation of Water-soluble Ions in PM2.5 in Xi'an Title of translation:西安市PM2.5中水溶性离子的季节变化特征 Authors:Huang, Han-Han (1); Wang, Yu-Qin (1); Li, Sheng-Ping (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:Wang, Yu-Qin(wangyuqin@sust.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2528-2535 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To explore the seasonal variations and sources of water-soluble ions, PM2.5 samples were collected from 2017 to 2018. Water-soluble ions including SO4^2-, NO3^-, Cl^-, F^-, Na⁺, Mg²⁺, NH4⁺, K⁺, and Ca²⁺ were determined via ion chromatography. Furthermore, the existing form of NH4⁺, nitrogen oxidation rate (NOR), sulfur oxidation rate (SOR), and [NO3^-]/[SO4^2-] ratio were explored. The results showed that dust, coal combustion, biomass burning, and secondary aerosols were the dominant contributors to water-soluble ions. Ca²⁺, SO4^2-, NH4⁺, and NO3^- were the main water-soluble ions in PM2.5 in Xi'an. Correlation analysis results showed that NH4⁺ could not completely neutralize SO4^2- in spring; unneutralized SO4^2- could be mainly combined with K⁺ and Ca²⁺. NH4⁺ mainly existed in the form of ① NH4HSO4 and (NH4)2SO4 in summer; ② NH4HSO4 and NH4NO3 in autumn; and ③ (NH4)2SO4 and NH4NO3 in winter. The yearly mean values of SOR and NOR were 0.35 and 0.16, respectively, indicating a high secondary aerosol transformation rate during the study period. The [NO3^-]/[SO4^2-] ratio showed Xi'an was mainly affected by stationary sources in spring and summer, while the contribution of mobile sources in autumn and winter was greater than stationary sources.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Coal combustion Controlled terms:Aerosols - Coal dust - Ion chromatography - Ions - Nitrogen compounds - Springs (components) Uncontrolled terms:Biomass-burning - Correlation analysis - Seasonal variation - Secondary aerosols - Stationary sources - Sulfur oxidation - Transformation rates - Water-soluble ions Classification code:503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 601.2 Machine Components - 801 Chemistry DOI:10.13227/j.hjkx.201910098 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796230 Title:Influence of Nutrient Pulse Input on Nitrogen and Phosphorus Concentrations and Algal Growth in the Sediment-Water System of Lake Taihu Title of translation:沉积物参与下氮磷脉冲式输入对太湖水体营养盐浓度和藻类生长的影响 Authors:Chen, Jie (1, 2); Xu, Hai (2); Zhan, Xu (1); Xu, Di (2); Zhu, Guang-Wei (2); Zhu, Meng-Yuan (2); Ji, Peng-Fei (1, 2); Kang, Li-Juan (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 Corresponding author:Zhan, Xu(xuzhan@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2671-2678 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Lake sediments not only act as a reservoir of nutrients, but are also a source of secondary pollution of nutrients for overlying water, which can buffer the variations in nutrients in overlying water and affect nutrient bioavailability and algal growth. In the current study, a simulation experiment was conducted using sediment cores collected in Meiliang Bay. Our aim was to elucidate the effect of nitrogen (N) and phosphorus (P) pulse input on variations in the water nutrient level and algal growth. We also clarified the migration and redistribution process of N and P between the sediment overlying water and algae. The results showed that the concentration of N in overlying water of the treatment group (with sediment) was much lower than that in controls (no sediment) when N was input at a pulse rate of 0.30 mg•(L•d)^-1. The loss rate of N in the overlying water of the treatment group ranged from 0.144 mg•(L•d)^-1 to 0.156 mg•(L•d)^-1 and that in the control ranged from 0.021 mg•(L•d)^-1to 0.039 mg•(L•d)^-1. On the contrary, the denitrification rate of overlying water in the treatment group ranged from 40.793 mg•(m²•d)^-1 to 44.193 mg•(m²•d)^-1, accounting to 48%-52% of the external N loading. In contrast, the denitrification rate of overlying water in controls was from 0.021 mg•(L•d)^-1to 0.039 mg•(L•d)^-1, only accounting for 7%-13% of the external N loading. These results indicated that the sediment-water interface is the main site of denitrification in shallow lakes and plays an essential role in reducing N pollution in lakes. With respect to the pulse input of P at a rate of 0.015 mg•(L•d)^-1, the majority of P (about 52%-58%) was imported into the sediment at a rate from 2.210 mg•(m²•d)^-1to 2.422 mg•(m²•d)^-1, and only a small proportion, approximately 23%-26%, was utilized by algae. The remaining P existed in overlying water in a dissolved state. These results implied that the sediment can buffer the external P input as an obvious "sink" effect of nutrients. Our results also showed that the sediment acts as a "source" of P when no external P was added. The release rate of P from the sediment to overlying water was from 0.310 mg•(m²•d)^-1 to 0.468 mg•(m²•d)^-1. In situ high-resolution analysis of ZrO-Chelex DGT showed that the DGT-P concentration in the interstitial water was much higher than that in the overlying water, and the concentration of DGT-P was significantly correlated with the concentration of DGT-Fe in interstitial water. These results indicate that changes in the redox potential may cause considerable release of internal phosphorus. In summary, our study showed that internal P in sediments can be released into the overlying water and support the growth of algae when the external nutrients are controlled. As a result, a delayed response was observed in the nutrient concentration in overlying water to external P reduction. Therefore, the dual control of N and P may have a better practical application to mitigate cyanobacteria blooms in shallow lakes.
© 2020, Science Press. All right reserved. Number of references:37 Main heading:Sediments Controlled terms:Algae - Biochemistry - Clarification - Denitrification - Lake pollution - Lakes - Nitrogen - Nutrients - Phosphorus - Redox reactions - Reservoirs (water) - Speed control - Water treatment Uncontrolled terms:Cyanobacteria blooms - Denitrification rate - High resolution analysis - Nitrogen and phosphorus - Nutrient concentrations - Redistribution process - Sediment water interface - Sediment-water system Classification code:441.2 Reservoirs - 445.1 Water Treatment Techniques - 453 Water Pollution - 483 Soil Mechanics and Foundations - 731.3 Specific Variables Control - 801.2 Biochemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Percentage 4.80e+01% to 5.20e+01%, Percentage 5.20e+01% to 5.80e+01%, Percentage 7.00e+00% to 1.30e+01%, Percentage 2.30e+01% to 2.60e+01% DOI:10.13227/j.hjkx.201911198 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861820 Title:Enhanced Chromate (Ⅵ) Removal Characteristics and Mechanism Using Graphene Oxide Immobilized Nanoscale Zero-Valent Iron Coupled with a Weak Magnetic Field (GO-nFe⁰/WMF) Title of translation:弱磁场强化氧化石墨烯负载纳米零价铁(GO-nFe⁰/WMF)对水中Cr(Ⅵ)的去除特性及机制 Authors:Ji, Meng (1); Bao, Jian-Guo (1); Zhu, Xiao-Wei (1); Du, Jiang-Kun (1); Zheng, Han (1) Author affiliation:(1) Hubei Laboratory of Special Wastewater Treatment, School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China Corresponding author:Bao, Jian-Guo(bjianguo@cug.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3326-3336 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:A green, high-efficiency mesoporous magnetic material with strong reusability and oxidation resistance, named graphene oxide immobilized nanoscale zero-valent iron (GO-nFe⁰), was prepared by a co-precipitation method. The structure, appearance, surface elements, and valence of GO-nFe⁰ were characterized via FESEM, TEM, FTIR, BET, XRD, and XPS. The characteristics and mechanism of Cr(Ⅵ) treatment in water using a weak magnetic field (WMF) coupled with GO-nFe⁰ (GO-nFe⁰/WMF) were studied. Batch experiments established that when the load mass ratio of GO to nFe⁰ was 1:10 under 20 mT weak magnetic field strength, the GO-nFe⁰/WMF system could completely remove the 10 mg•L^-1 of Cr(Ⅵ) solution in 30 min, consistent with first-order dynamics. With a decrease in initial pH value and an increase in material dosage, the removal efficiency of Cr(Ⅵ) increased significantly by enhancing the release rate of Fe²⁺. ClO4^- had no effect on the reaction, Cl^- could encourage corrosion and promote the corrosion of nFe⁰ to release Fe²⁺, CO3^2- restrained the reaction through an increase in initial pH of the solution, and SO4^2- could promote the dissolution of the nFe⁰ surface passivation film to accelerate the reaction process. The GO-nFe⁰/WMF system can maintain high activity after five reuses and 30 days of exposure to air. XRD, XPS, and 1,10-phenanthroline shielding experiments proved that its great conductivity allowed GO to provide electron transfer sites to accelerate the transfer of electrons, and nFe⁰ could quickly release Fe²⁺. WMF generated a magnetic gradient force (FΔB) that pushed the paramagnetic Fe²⁺ ions in the diffusion boundary layer concentrated on the two poles of GO-nFe⁰, where the most magnetic intensity was present, to exposed active sites on both sides. The high removal rate ability of GO-nFe⁰ to release Fe²⁺continuously was maintained.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Iron metallography Controlled terms:Boundary layers - Chromates - Efficiency - Graphene - Iron - Magnetic fields - Magnetic materials - Nanomagnetics - Oxidation resistance - Passivation - Precipitation (chemical) - Reusability - Water treatment - X ray diffraction - X ray photoelectron spectroscopy Uncontrolled terms:Characteristics and mechanisms - Coprecipitation method - Diffusion boundary-layers - Electron-transfer sites - Nano-scale zero valent irons - Removal characteristics - Removal efficiencies - Weak magnetic fields Classification code:445.1 Water Treatment Techniques - 539.1 Metals Corrosion - 539.2.1 Protection Methods - 545.1 Iron - 701.2 Magnetism: Basic Concepts and Phenomena - 708.4 Magnetic Materials - 761 Nanotechnology - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Age 8.22e-02yr, Magnetic_Flux_Density 2.00e-02T, Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Time 1.80e+03s DOI:10.13227/j.hjkx.201912265 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990463 Title:Effect of a Comprehensive Improvement Project on Water Quality in Urban Lakes: A Case Study of Water Quality Variation in Lihu Lake Over the Past 30 Years Title of translation:城市湖泊水环境整治对改善水质的影响:以蠡湖近30年水质变化为例 Authors:Tian, Wei (1, 2); Yang, Zhou-Sheng (1); Shao, Ke-Qiang (2); Pan, Hui (3); Hu, Yang (2); Bai, Cheng-Rong (2); Jiang, Xing-Yu (2); Gao, Guang (2); Tang, Xiang-Ming (2) Author affiliation:(1) College of Environmental Science and Engineering, Anhui Normal University, Wuhu; 241003, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Jiangsu Jiangda Ecological Technology Co., Ltd., Wuxi; 214125, China Corresponding author:Yang, Zhou-Sheng(yzhoushe@mail.ahnu.edu.cnemailxmtang@niglas.ac.cn)Tang, Xiang-Ming(xmtang@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:183-193 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to improve water quality, many urban lakes in China have undergone environmental restoration since the introduction of China's tenth five-year plan. To understand the effectiveness of improvement projects on eutrophic urban lakes, we analyze the changes in water quality of Lihu Lake over the past 30 years, i.e., before and after comprehensive remediation. We use long-term monitoring data from TLLER and from two regional investigations undertaken in 2017. The results were as follows. ① Concentrations of total nitrogen (TN) and total phosphorus (TP), the permanganate index, and chlorophyll-a (Chl-a) in Lihu Lake all increased dramatically since the 1990s and reached the worst levels during the period from 1997 to 2003. After comprehensive improvement measures for the lake undertaken by the local government in 2003, the water quality improved remarkably year by year, but reduced slightly in the past two years assessed here. There was no obvious improvement in water transparency when comparing data from before to after the remediation. ② Before the improvement measures, the water quality fluctuated greatly with season, however, water quality sampled during the winter post remediation was significantly better than during the summer. ③ Spatially, the water quality in the western region of Lihu Lake was significantly better than of that in the eastern region. When comparing government measures in different eutrophic urban lakes, we found that engineering management measures can improve the water quality of urban lakes over a relatively short time period. However, after the water quality has been improved, it is necessary to restore the macrophyte-dominated ecosystem, which should be supplemented by ecological restoration based on biological regulation. By improving species diversity, the aquatic ecosystem can be successfully transformed from being phytoplankton-dominated to macrophyte-dominated, thereby enabling the service functions of a lake ecosystem to be truly restored.
© 2020, Science Press. All right reserved. Number of references:52 Main heading:Lakes Controlled terms:Aquatic ecosystems - Eutrophication - Pollution - Restoration - Water quality Uncontrolled terms:Ecological restoration - Engineering management - Environmental restoration - Improvement measure - Long-term monitoring datum - Service functions - Water quality variations - Water transparency Classification code:445.2 Water Analysis - 454.3 Ecology and Ecosystems Numerical data indexing:Age 3.00e+01yr DOI:10.13227/j.hjkx.201906022 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990498 Title:Effects of Different Amendments on Fractions and Uptake by Winter Wheat in Slightly Alkaline Soil Contaminated by Cadmium and Nickel Title of translation:不同钝化剂对微碱性土壤镉, 镍形态及小麦吸收的影响 Authors:Zhang, Jing-Jing (1); Zhu, Shuang-Ge (1); Zhu, Li-Nan (1); Liu, Hai-Tao (1); Yang, Jin-Kang (1); Hua, Dang-Ling (1) Author affiliation:(1) College of Resources and Environment, Henan Agricultural University, Zhengzhou; 450000, China Corresponding author:Hua, Dang-Ling(collegehua@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:460-468 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effects of a single application of three amendments (biochar, lignite, and chicken manure) on the fraction transformations of soil Cd and Ni and uptake by winter wheat are reported to provide reference for passivation and the remediation of heavy metals in soil. Field experiments were conducted to investigate the effects of different passivators on the forms of Cd and Ni in soils at different growth stages of winter wheat, and to analyze the contents of Cd and Ni in different organs of wheat. The results showed that biochar increased soil pH and that lignite reduced soil pH, but not significantly. Chicken manure significantly reduced soil pH at booting and mature stages, and decreased by 0.23 and 0.20 pH units, respectively. The single application of biochar, chicken manure, or lignite did not reduce the exchangeable Ni content significantly, whereas the effect on the exchangeable Cd was significant. Lignite 2% treatment had the greatest decrease in exchangeable Cd at different growth stages of wheat, which were 30.50%, 43.34%, and 31.20%, respectively. The contents of Cd and Ni in the shoots and underground parts of wheat decreased to some extent, and the extent of these decreases increased with the increase of passivator dosage. The decrease of Cd content in wheat roots was the largest under the treatment of lignite 2% at different growth stages, reaching 38.35%, 58.00%, and 50.20% respectively. The greatest decline of Ni content in wheat roots occurred in the lignite 2% treatment at the booting (41.33% decline) and mature stages (51.35%). All the three amendments reduced the availability of Cd and Ni in slightly alkaline soil, and the passivation effect on Cd was better than that of Ni. All three amendments also effectively reduced the content of Cd and Ni in different organs of wheat plants in different growth period. The order of decreasing effect of Cd in wheat organs was lignite>biochar>chicken manure at the same dose of these three passivators.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Soils Controlled terms:Alkalinity - Animals - Cadmium - Crops - Fertilizers - Lignite - Manures - Nickel - Passivation Uncontrolled terms:Alkaline soils - Chicken manure - Decreasing effect - Different growth stages - Field experiment - Growth period - Heavy metals in soil - Passivation effect Classification code:483.1 Soils and Soil Mechanics - 524 Solid Fuels - 539.2.1 Protection Methods - 548.1 Nickel - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1 Chemistry, General - 804 Chemical Products Generally - 821.4 Agricultural Products - 821.5 Agricultural Wastes Numerical data indexing:Percentage 2.00e+00%, Percentage 3.05e+01%, Percentage 3.12e+01%, Percentage 3.84e+01%, Percentage 4.13e+01%, Percentage 4.33e+01%, Percentage 5.02e+01%, Percentage 5.14e+01%, Percentage 5.80e+01% DOI:10.13227/j.hjkx.201907110 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408070262 Title:Effects of Mycorrhizal Fungi on Nitrification and Denitrification in the Rhizospheric Soil of Aquatic Plants and Its Microbial Mechanism Title of translation:接种菌根真菌对湿生植物根际土壤硝化反硝化活性的影响及其微生物机制 Authors:Liu, Duo (1, 2); Wang, Lei (1, 2); Cao, Zhan-Bo (3); Duan, Hao (4) Author affiliation:(1) Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (2) Shanghai Institute of Pollution Control and Ecological Security, Shanghai; 200092, China; (3) School of Biotechnology, East China University of Science and Technology, Shanghai; 200237, China; (4) Shanghai Municipal Engineering Design Institute(Group) Co., Ltd., Shanghai; 200092, China Corresponding author:Wang, Lei(celwang@tongji.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:932-940 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the effect of mycorrhizal fungi inoculation on nitrification-denitrification in the rhizospheric soil of aquatic plants, Cyperus alternifolius and Acorus tatarinowii were inoculated with the strain MF-MD obtained from local soil. Uninoculated plants served as the control group. The plants were cultivated for 3 months under nitrogen eutrophication in water, and then the nitrification and denitrification activities in the rhizospheric soil were determined. The results showed that inoculation with MF-MD promoted nitrification in the rhizospheric soil of both plants. However, MF-MD inoculation promoted denitrification in the rhizospheric soil of Cyperus alternifolius but inhibited denitrification in the rhizospheric soil of Acorus tatarinowii. The mechanism of soil nitrification-denitrification activity was analyzed by measuring the changes in the community structure of nitrifying bacteria and denitrifying bacteria in the microbial biomass of the rhizospheric soil. It was found that the rhizospheric soil microbial biomass (SMB) of the experimental group was higher than that of the control group and that the changes in the microbial community structure related to soil nitrification and denitrification differed between groups. This study contributes to an understanding of how mycorrhizal fungi combined with aquatic plants can remove N content in eutrophic water.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:Nitrification Controlled terms:Bacteria - Denitrification - Eutrophication - Fungi - Soils Uncontrolled terms:Aquatic plants - Denitrifying bacteria - Mycorrhizal fungus - Nitrification-denitrification - Nitrifying bacteria Classification code:483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions Numerical data indexing:Age 2.50e-01yr DOI:10.13227/j.hjkx.201906119 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071162 Title:Phosphorus Forms and Release Risk of Sediments in Urban Sewage Treatment Plant Effluent and Receiving Stream Reach Title of translation:污水厂尾水受纳河段沉积物磷形态及释放风险效应 Authors:Tang, Ning (1, 2); Li, Ru-Zhong (1, 2); Wang, Yu-Qing (1, 2); He, Rui-Liang (1, 2); Liu, Chao (1, 2) Author affiliation:(1) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei; 230009, China; (2) Key Laboratory of Nano minerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei; 230009, China Corresponding author:Li, Ru-Zhong(lrz1970@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:801-808 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:From October 2018 to April 2019, the surface sediment and overlying water samples were collected every two months from the upstream and downstream of the effluent outlet of the Caitianpu sewage treatment plant in the Banqiao River, Hefei City. The effects of the sewage treatment plant effluent on both phosphorus forms and the equilibrium phosphate concentration (EPC0) in sediments were analyzed. The response of equilibrium phosphate concentration to external carbon (sodium acetate) and the release risk of phosphorus in sediments were investigated. Result show that the phosphorus pollution in Banqiao River was more severe. The average values of total phosphorus in the sediments at the upper and lower effluent outlet were 789.39 mg•kg^-1 and 854. 41 mg•kg^-1, respectively, and the average bio-available phosphorus amounts were 157.19 mg•kg^-1and 173.37 mg•kg^-1, respectively. The EPC0 values of the four sampling points decreased in the order SP1>SP2>SP3>CP, indicating that the sewage treatment plant effluent increased the EPC0 level and phosphorus release risk of the stream sediments. Moreover, the addition of exogenous carbon significantly decreased the EPC0 value of the sediment, especially in SP1, suggesting that the addition of exogenous carbon decreased the risk of phosphorus release from sediments.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Sewage treatment plants Controlled terms:Effluent treatment - Effluents - River pollution - Rivers - Sediments - Sodium compounds Uncontrolled terms:External carbon addition - Phosphate concentration - Phosphorus form - Phosphorus release - Sewage-treatment plant effluent Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 453 Water Pollution - 483 Soil Mechanics and Foundations DOI:10.13227/j.hjkx.201908084 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278172 Title:Community of Benthic Diatoms and Their Relationship with Aquatic Environmental Factors in the Tangwang River, China Title of translation:汤旺河着生硅藻群落及其与环境因子的关系 Authors:Xue, Hao (1, 2); Wang, Ye-Yao (1, 3); Meng, Fan-Sheng (2); Zheng, Bing-Hui (1, 2); Zhang, Ling-Song (2); Cheng, Pei-Xuan (2) Author affiliation:(1) College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (2) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) China National Environmental Monitoring Centre, Beijing; 100012, China Corresponding author:Meng, Fan-Sheng(mengfs@craes.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1256-1264 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To reasonably evaluate the eco-environmental health of the Tangwang River, which is a tributary of the Songhua River in China, community structures of periphyton and cleanliness of the benthic diatom at 24 sampling sites were investigated using McNaughton's dominance index, clustering, and ecotype analysis, while the relationship between the environmental factors and the diatom communities were studied by principal component analysis, Spearman correlation test, and redundancy analysis, in August 2018 (flood season). A total of 99 species or variants of benthic diatoms have been identified, indicating that there were abundant diatoms in the Tangwang River. Achnanthidium minutissimum and other diatoms that can be used as clean water indicators were dominant species in the Tangwang River, which indicates that the eco-environmental quality of the Tangwang River was relatively healthy in the flood season. Of these, the dominant degree of A. minutissimum was 0.32, making it the absolute dominant species in Tangwang River. Sampling sites can be divided into three groups based on clustering analysis. The dominant species of group 1 and group 2 were mainly clean species, indicating that the two groups were in a relatively healthy state. Nitzschia palea, Ulnaria ulna, and other diatoms that can be used as eutrophication indicators were the dominant species of group 3, indicating that group 3 was less healthy than the other two groups. From groups 1 and 2, the results from ecotype analysis showed a decrease in the proportion of polyoxybiontic diatoms and an increase in the proportion of α-mesosaphrobe diatoms, polysaprobe diatoms, oligo-mesotrophic diatoms, mesotrophic diatoms, meso-eutrophic diatoms, and eutrophic diatoms. Compared to the other two groups, the results from ecotype analysis showed a significant increase in the proportion of α-mesosaphrobe diatoms, polysaprobe diatoms, eutrophic diatoms and hypereutrophic diatoms in group 3. The predominant aquatic influencing factors of diatom community structures for the Tangwang River were permanganate index, total nitrogen (TN), and ammonia nitrogen (NH4⁺-N), of which permanganate index was the main factor for group 2, while TN and NH4⁺-N were the main factors for group 3. As a result, the eco-environmental quality of the Tangwang River was good, and the benthic diatom was found to be an effective indicator of the nutritional conditions and saprophytic status.
© 2020, Science Press. All right reserved. Number of references:44 Main heading:Phytoplankton Controlled terms:Ammonia - Aquatic organisms - Eutrophication - Floods - River pollution - Rivers Uncontrolled terms:Achnanthidium minutissimum - Benthic diatoms - Community structures - Eco-environmental quality - Ecological type - Environmental factors - Nutritional conditions - Saprobic Classification code:453 Water Pollution - 471 Marine Science and Oceanography - 804.2 Inorganic Compounds DOI:10.13227/j.hjkx.201907182 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278119 Title:Effect of Alkaline Sludge Fermentation Products on the Nitrification Process and Performance Title of translation:剩余污泥碱性发酵产物对硝化过程及性能的影响 Authors:Qiu, Sheng-Jie (1); Liu, Jin-Jin (1); Li, Xi-Yao (1); Peng, Yong-Zhen (1) Author affiliation:(1) National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China Corresponding author:Peng, Yong-Zhen(pyz@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1418-1424 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The aim of the present study was to investigate the effect of alkaline sludge fermentation products as a carbon source on the nitrification process and performance. During the operation of a biological nitrogen removal (BNR) system with sludge fermentation mixture as the carbon source, the activities of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) were inhibited at the beginning. After 16 days, the activity of AOB began to recover rapidly, but the activity of NOB was still inhibited. The specific nitrate production rate (SNaPR, N/VSS) decreased from 0.179 1 g•(g•d)^-1 to 0.007 8 g•(g•d)^-1. At the same time, the nitrite accumulation rate increased from 8.12% to 91.42% and remained stable. The sludge fermentation mixture was separated into sludge fermentation liquid and sludge fermentation sediment. The changes in nitrification activity by adding different types of fermentation products were investigated. The results showed that the activity of NOB decreased in the experimental group fed with the sludge fermentation mixture and the fermentation liquid. The SNaPR decreased from an initial 0.179 3 g•(g•d)^-1 to 0.151 0 g•(g•d)^-1 and 0.161 7 g•(g•d)^-1, respectively. In the experimental group fed with fermentation sediment, the activity of NOB increased. SNaPR rose from 0.179 3 g•(g•d)^-1 to 0.186 4 g•(g•d)^-1. Therefore, the activity of the NOB can be inhibited when the sludge fermentation mixture and the fermentation liquid are used as a carbon source in the nitrification process. In addition, the short-range nitrification process can be realized, which is beneficial to accelerating the reaction speed and saving investment in this type of carbon source.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Nitrification Controlled terms:Ammonia - Bacteria - Carbon - Fermentation - Investments - Liquids - Mixtures - Nitration - Nitrogen removal - Sodium compounds Uncontrolled terms:Ammonia oxidizing bacteria - Biological nitrogen removal - Fermentation products - Municipal wastewaters - Nitrification activity - Nitrifying bacteria - Nitrite-oxidizing bacteria - Sludge fermentation Classification code:802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Age 4.38e-02yr, Percentage 8.12e+00% to 9.14e+01% DOI:10.13227/j.hjkx.201909017 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278123 Title:Use of Iron-modified Calcite as an Active Capping Material to Control Phosphorus Release from Sediments in Surface Water Bodies Title of translation:利用铁改性方解石作为活性覆盖材料控制水体内源磷的释放 Authors:Bai, Xiao-Yun (1); Lin, Jian-Wei (1); Zhan, Yan-Hui (1); Chang, Ming-Yue (1); Xin, Hui-Min (1); Wu, Jun-Lin (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:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1296-1307 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The use of calcite (CA) as an active capping material has high potential for controlling the release of phosphorus (P) from sediments, but its efficiency still needs to be enhanced. To address this issue, an iron-modified CA (Fe-CA) was prepared, the removal performance of phosphate from aqueous solution by Fe-CA was studied, and the efficiency of the use of Fe-CA as an active capping material to prevent the liberation of P from sediments was investigated. The results showed that Fe-CA exhibited much higher phosphate removal ability than CA. The phosphate removal efficiency of Fe-CA increased with an increase in the Fe-CA dosage. Increasing the initial phosphate concentration gave rise to an increase in the amount of phosphate removed by Fe-CA, and the maximum amount of phosphate removed by Fe-CZ reached 3.09 mg•g^-1. Sediment capping with Fe-CA could effectively control the release of soluble reactive P (SRP) from the sediment into the overlying water, leading to a very low concentration of SRP in the overlying water. Additionally, the Fe-CA capping also resulted in the transformation of a small amount of redox-sensitive P (BD-P) and metal-oxide-bound P (NaOH-rP) in sediments to residual P (Res-P), leading to a slight increase in the stability of P in the sediment. The overwhelming majority (90.8%) of P bound by the Fe-CA capping layer existed in the form of NaOH-rP, calcium-bound P (HCl-P), and Res-P, which are relatively very stable. Furthermore, the percentage of bioavailable P (BAP) as a proportion of total extractable P in the P-bound Fe-CA capping layer was very low, and the bound P was re-released with difficulty into the water column for algae growth. Compared to CA capping, the efficiency for the control of sedimentary P release into the overlying water by Fe-CA capping was much higher, and the stability of P bound by the Fe-CA capping layer was also higher. The results of this work indicate that Fe-CA is a very promising active capping material for the interception of the release of P from sediments into the overlying water.
© 2020, Science Press. All right reserved. Number of references:53 Main heading:Sediments Controlled terms:Calcite - Chemicals removal (water treatment) - Efficiency - Metals - Sodium hydroxide - Surface waters Uncontrolled terms:Active capping - Low concentrations - Phosphate concentration - Phosphorus loading - Release control - Removal performance - Soluble reactive P - Surface water body Classification code:444.1 Surface Water - 483 Soil Mechanics and Foundations - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 913.1 Production Engineering Numerical data indexing:Percentage 9.08e+01% DOI:10.13227/j.hjkx.201908127 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658187 Title:Comparative Analysis of Pollution Characteristics of Carbonaceous Aerosol Components in the Atmosphere Between Urban and Suburban Areas Title of translation:城区与县区不同空气质量下碳组分污染特征对比分析 Authors:Li, Xin-Yue (1); Zhang, Kai-Shan (1); Deng, Lin-Li (1); Xiang, Xin-Peng (1); Wu, Wen-Qi (1); Yin, Zi-Yuan (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:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2026-2035 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To compare the pollution characteristics of carbonaceous aerosol components in the atmosphere between urban and suburban areas, Chengdu City and Renshou County were selected as study areas from which 88 samples of PM2.5 during haze and non-haze periods were collected and analyzed. Quantification of mass concentrations of PM2.5, carbonaceous aerosol components [organic carbon (OC), elemental carbon (EC), and secondary organic carbon (SOC)], along with correlation analysis of OC and EC, and principal component analysis (PCA) of carbon components were carried out. The results show that pollutant concentrations during the haze period were higher than those during the non-haze period. The OC and EC for Chengdu City and Renshou County were positively correlated, with their correlation coefficients during the non-haze period higher than those during the haze period. The ratios of SOC/PM2.5in Renshou County were higher than those in Chengdu City during the haze period. This indicates that secondary aerosols play a more important role in haze formation in Renshou than in Chengdu City. In contrast, the proportion of secondary aerosols during the non-haze period in Chengdu City was significantly higher, indicating that direct emissions are still the main cause of air pollution in Chengdu City. PCA results showed that PM2.5formation in both Chengdu City and Renshou County was mainly due to coal burning, vehicle operation, and biomass burning.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Air pollution Controlled terms:Aerosols - Organic carbon Uncontrolled terms:Carbonaceous aerosol - Comparative analysis - Correlation analysis - Correlation coefficient - Pollutant concentration - Secondary aerosols - Secondary organic carbons (SOC) - Urban and suburban areas Classification code:451 Air Pollution - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201909079 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371210 Title:Impact of Hydraulic Retention Time on Performance of Partial Nitrification Granular Sludge in Continuous Stirred-Tank Reactor Title of translation:HRT对CSTR亚硝化颗粒污泥性能影响 Authors:Wang, Jian-Fang (1, 2, 3); Qi, Ze-Kun (1); Qian, Fei-Yue (1, 3); Liu, Wen-Ru (1, 3); Zhang, Jun (4); Wang, Wei (4); Shen, Cong (2) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) College of Tianping, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou; 215009, China; (4) Suzhou Drainage Company Limited, Suzhou; 215001, China Corresponding author:Qian, Fei-Yue(feiyuechandler@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1794-1800 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The effects of different hydraulic retention time (HRT) on short-cut nitrification granular sludge were studied in a continuous stirred-tank reactor (CSTR) by maintaining stable influent ammonia nitrogen load. Particle size distribution, extracellular polymeric substances (EPS), and functional bacterial kinetics were analyzed. The morphology of granular sludge, the performance of the CSTR, and the activity of functional microorganisms were investigated. The high throughout sequencing technology of MiSeq was employed to analyze the structure of the microbial community in sludge. The results showed that the ammonia nitrogen removal rate in the reactor was gradually increased from 80% to 95%, and the nitrite accumulation rate was always over 85% when the HRT was decreased from 4 h to 1 h. Particle size distribution of granular sludge was greatly influenced by HRT. The mass fraction of granules with a diameter smaller than 0.3 mm and larger than 1.6 mm was gradually declined, whereas the mass fraction of granules with a diameter between 0.3 mm and 0.8 mm was increased when HRT was shortened from 4 h to 1 h. The dominating proportion of granules with a diameter between 0.3 mm and 0.8 mm reached about 50% when HRT was 1 h. The impact of HRT on the activity of functional microorganisms was studied, and HRT activity was found to be closely related to the size of granular sludge. Proteobacteria were dominant in the system. AOB enrichment was represented by Nitrosomonas, which was more than 56%. Shortening HRT is beneficial for the enrichment of AOB.
© 2020, Science Press. All right reserved. Number of references:27 Main heading:Particle size analysis Controlled terms:Ammonia - Chemical reactors - Granular materials - Granulation - Light transmission - Microorganisms - Nitration - Nitrification - Nitrogen removal - Particle size - Size distribution - Tanks (containers) Uncontrolled terms:Continuous stirred tank reactor - Granular sludge - High-throughput sequencing - Hydraulic retention time - Microbial communities Classification code:461.9 Biology - 619.2 Tanks - 741.1 Light/Optics - 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes - 804.2 Inorganic Compounds - 922.2 Mathematical Statistics - 951 Materials Science Numerical data indexing:Percentage 5.00e+01%, Percentage 5.60e+01%, Percentage 8.00e+01% to 9.50e+01%, Percentage 8.50e+01%, Size 1.60e-03m, Size 3.00e-04m, Size 3.00e-04m to 8.00e-04m, Time 1.44e+04s to 3.60e+03s, Time 3.60e+03s DOI:10.13227/j.hjkx.201911012 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008886 Title:Emission Characteristics of Biogenic Volatile Compounds (BVOCs) from Common Greening Tree Species in Northern China and Their Correlations with Photosynthetic Parameters Title of translation:北方常见绿化树种BVOCs排放特征及其与光合作用参数的相关性 Authors:Xu, Yan (1, 2); Li, Shuang-Jiang (1); Yuan, Xiang-Yang (2); Feng, Zhao-Zhong (3) Author affiliation:(1) Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, 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) Institute of Ecology, School of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing; 210044, China Corresponding author:Yuan, Xiang-Yang(xyyuan@rcees.ac.cnemailzhaozhong.feng@nuist.edu.cn)Feng, Zhao-Zhong(zhaozhong.feng@nuist.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3518-3526 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to understand the emission characteristics of common greening trees in Beijing and analyze their correlations with photosynthetic parameters, including the net photosynthetic rate (Pn), stomatal conductance (gs), intercellular CO2 concentration (ci), and transpiration rate (Tr), we collected samples of biogenic volatile organic compounds (BVOCs) using a dynamic sampling technique from 14 species of deciduous trees. The results showed that there were significant differences in isoprene and total BVOC emissions between family or genus levels (P<0.01). With the exception of Lonicera maackii Maxim and Ulmus pumila L., all species were found to emit isoprene, monoterpenes, and sesquiterpenes, of which, species from the Salicaceae (e. g., Populus deltoides cv. '55/56'× P. deltoides cv. 'Imperial', P. euramericana cv. '74/76', Populus simonii Carr, and Salix babylonica) and Legume (Sophora japonica, Robinia pseudoacacia, and S. japonica Linn. var. japonica f. pendula Hort) families were the higher isoprene emitters, with emission rates that ranged from (30.1±4.3) μg•(g•h)^-1to (91.8±10.0) μg•(g•h)^-1. Plants from the Oleaceae (e. g., Fraxinus chinensis Roxb and Syringa oblata Lindl), Begonia (Malus prunifolia), Sapindaceae (Koelrenteria paniculate), and Aceraceae (Acer truncatum Bunge) families mainly emitted monoterpenes and sesquiterpenes. Among them, Fraxinus chinensis Roxb and Acer truncatum Bunge were the highest emitters with emission rates of (10.6±4.8) μg•(g•h)^-1 and (11.8±6.4) μg•(g•h)^-1, respectively. Ocimene and β-pinene were the two main monoterpenes emitted from greening tree species. No significant correlations were found between the emission of BVOCs and Pn or gs, while the emission rate of isoprene (r=0.681; P<0.01) and the total BVOC (r=0.698; P<0.01) from the Salicaceae family increased with increasing Tr. Moreover, leguminous plants showed a significant positive correlation between the total BVOC emission rate and ci (P=0.04). This study provides a scientific reference for the selection and configuration of urban greenery, and a theoretical basis for exploring the mechanism of BVOC emissions.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Monoterpenes Controlled terms:Cotton - Forestry - Isoprene - Olefins - Particulate emissions - Plants (botany) - Volatile organic compounds Uncontrolled terms:Biogenic volatile organic compounds - Emission characteristics - Net photosynthetic rate - Photosynthetic parameters - Positive correlations - Robinia pseudo-acacia - Scientific references - Stomatal conductance Classification code:451.1 Air Pollution Sources - 804.1 Organic Compounds - 821.4 Agricultural Products DOI:10.13227/j.hjkx.202001180 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256317 Title:Spatiotemporal Differentiation and Degradation Analysis of Polybrominated Diphenyl Ethers in Sediments of Shanmei Reservoir and Its Inflowing River, Quanzhou, China Title of translation:泉州山美水库及入库河流沉积物中多溴二苯醚的时空分异和降解分析 Authors:Han, Wen-Liang (1); Liu, Yu (1); Feng, Kai-Wen (1) Author affiliation:(1) Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen; 361021, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4525-4538 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the spatiotemporal differentiation of polybrominated diphenyl ethers (PBDEs) in urban water-source reservoirs and degradation sources of BDE homologues and their contributions, we analyzed the contents, pollution degrees, spatial distributions, hydrological period changes, inventories, profiles, and degradation source contributions of PBDEs in the surface sediments of Shanmei Reservoir and its inflowing river, Quanzhou, China. The results showed that the median ∑PBDEs (1 072.1 ng•g^-1) in the inflowing river sediment was 6.7 times than that of the reservoir (160.4 ng•g^-1) and the total amount of ∑PBDEs in sediments per unit area (80.3 kg•km^-2) was 6.3 times than that of Taihu Lake and 188 times than that of the Great Lakes in North America. The pollution degrees of PBDEs in Shanmei Reservoir were more severe than those of most lakes and reservoirs at home and abroad, which was dominated by BDE-209 (84.5%-99.2%). Most of the sampling sites in the reservoir (r 0.564-0.994, P<0.034) and the inflowing river (r 0.953-1.0, P<0.000) had high similarity in the composition of PBDEs. Significantly positive correlations (r 0.779-0.964, P<0.005) were observed between the reservoir entry area and river sampling sites, which were stronger than the other functional areas, indicating that the inflowing river was a major pollution source of PBDEs in the Shanmei Reservoir. The tail region of the reservoir had low correlations with the inflowing river (r 0.454-0.915, P≤0.128), and was relatively much more affected by Jiudu Town. The changes in hydrological period of the ∑PBDEs were relatively consistent at each sampling site (r 0.617-0.714, P≤0.077), but the impact of the changes in the hydrological period on the ∑PBDEs was not statistically significant (P=0.178, Two-Way ANOVA). However, the site changes had a significant influence on the ∑PBDEs (P=0.000 1), and significant or nearly differences were observed between the reservoir entry area and other functional areas (P 0.019-0.061), indicating that the spatial distribution variations of the PBDEs in reservoir sediments were greater than the changes in hydrological period. The natural degradation of the PBDEs gradually increased from the river to the reservoir entry area and then to the central reservoir area. The reductive debromination rates varied at different brominated levels, and some BDE homologues accumulated due to their slowly continued degradation velocities. Research on abundance ratios indicated that the lower brominated BDE homologues were mainly derived from the natural degradation of decabromodiphenyl ether by stepwise reductive debromination. Approximately 70% of Nona-BDE produced by Deca-BDE degradation could rapidly be degraded to form Octa-BDE. Approximately 85% of BDE-208 was derived from the degradation of BDE-209. During the degradation process from Octa-BDE to Penta-BDE, some Octa-BDE and Hexa-BDE homologues accumulated due to relatively slower degradation velocities, and the degradation rates of Penta-BDE to Tri-BDE were above 70%.
© 2020, Science Press. All right reserved. Number of references:62 Main heading:River pollution Controlled terms:Degradation - Ethers - Lakes - Organic pollutants - Reservoirs (water) - Rivers - Sediments - Spatial distribution Uncontrolled terms:Decabromodiphenyl ethers - Degradation analysis - Lake sand reservoirs - Polybrominated diphenyl ether (PBDEs) - Positive correlations - Reductive debromination - Source contributions - Spatio-temporal differentiations Classification code:441.2 Reservoirs - 453 Water Pollution - 483 Soil Mechanics and Foundations - 802.2 Chemical Reactions - 804.1 Organic Compounds - 921 Mathematics Numerical data indexing:Percentage 7.00e+01%, Percentage 8.45e+01% to 9.92e+01%, Percentage 8.50e+01% DOI:10.13227/j.hjkx.202003096 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008933 Title:Antibiotics Induce Horizontal Gene Transfer of Resistance at Sublethal Concentrations Title of translation:亚剂量抗生素诱导抗性基因水平迁移 Authors:Yuan, Qi-Yi (1); Chen, Hong-Jie (2); Haller, Laurence (2); He, Yi-Liang (1) Author affiliation:(1) School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Department of Civil and Environmental Engineering, National University of Singapore, Singapore; 117576, Singapore Corresponding author:He, Yi-Liang(ylhe@sjtu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3748-3757 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the conjugation of genes encoding extended-spectrum β-lactamase (ESBL), ESBL-expressing P. aeruginosa and E. coli strains isolated from the wastewater of major hospitals in Singapore were used as donors. gfp-tagged E. coli SCC1 strains resistant to chloramphenicol (CHL) were chosen as recipients. Using response surface analysis, we detected and analyzed the induction of conjugal transfer under single-exposure and co-exposure of tetracycline (TC), sulfamethoxazole (SMZ), and ceftazidime (CAZ) at sublethal concentrations. It was found that the ESBL plasmid could be conjugal transferred from P. aeruginosa and E. coli strains to the recipient E. coli SCC1 strains at an average frequency of 0.001 5 and 0.004 2, respectively, without stress from inducing antibiotics, thus showing a low fitness cost and higher conjugal frequency between E. coli strains under the exposure of sub-MIC antibiotics. A significant conjugation between E. coli strains occurred under the single-exposure or co-exposure of a TC concentration of <0.03 mg•L^-1 and a CAZ concentration of <0.002 mg•L^-1, as inhibited by a sub-MIC level of TC. The conjugation between P. aeruginosa and E. coli strains was stimulated under the exposure of TC and CAZ with concentrations 5-times larger than the MIC, while no significant induction was detected from the sub-MIC antibiotics.
© 2020, Science Press. All right reserved. Number of references:33 Main heading:Escherichia coli Controlled terms:Antibiotics - Gene transfer - Genes - Microwave integrated circuits - Surface analysis Uncontrolled terms:Average frequency - Fitness costs - Genes encoding - Horizontal gene transfer - P.aeruginosa - Response surface analysis - Single exposure - Sulfamethoxazole Classification code:461 Bioengineering and Biology - 714.2 Semiconductor Devices and Integrated Circuits - 951 Materials Science DOI:10.13227/j.hjkx.201912015 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256457 Title:Spatial-temporal Variations and the Regulators of Nitrate Status in Shallow Groundwater of the Typical Mountainous Agricultural Watershed in the Upper Reaches of the Yangtze River Title of translation:长江上游典型山地农业小流域浅层地下水硝态氮时空变异特征及影响因素 Authors:Jiang, Nan (1, 2); Zhou, Ming-Hua (1); Li, Hong (1); Li, Zi-Yang (1, 2); Zhang, Xi-Feng (1); Zhu, Bo (1) Author affiliation:(1) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Zhou, Ming-Hua(mhuazhou@imde.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4539-4546 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Shallow groundwater is the main drinking water supply for the mountainous area in the upper reaches of the Yangtze River, while its quality is often degraded by nitrate (NO3^--N) pollution due to intensive agricultural production activities. In the present study, we selected a mountainous agricultural watershed in the upper reaches of the Yangtze River to investigate the land use, management, and hydrogeological conditions, aiming to clarify the spatial-temporal variations in NO3^--N concentration of shallow groundwater, thereby exploring the key regulators. The results showed that the NO3^--N concentrations of the groundwater ranged from 0.40 to 12.51 mg•L^-1in the study area, and the exceeding ratio was nearly 30%. On an average, NO3^--N concentrations for the wet season were higher than that for the dry season, indicating great variations in NO3^--N concentration across different seasons. In addition, the spatial variations of NO3^--N concentration in groundwater were also significant among different sub-catchment, which was mainly due to variations in the groundwater table depth and land uses. Furthermore, the significant correlations between the NO3^--N concentrations and concentrations of Cl^-, NH4⁺-N, DOC, and SO4^2- in the shallow groundwater were also explored in this study, suggesting that the NO3^--N concentrations were likely to depend on the chemical factors of the shallow groundwater in the study area. Overall, our current study highlights that the characterization of spatial-temporal variations of NO3^--N status in shallow groundwater and illustration of key regulators are essential to mitigate NO3^--N pollution and prevent quality degradation of shallow groundwater in mountainous rural areas of the upper Yangtze River watershed.
© 2020, Science Press. All right reserved. Number of references:40 Main heading:River pollution Controlled terms:Agricultural robots - Agriculture - Catchments - Groundwater - Groundwater pollution - Hydrogeology - Land use - Nitrates - Potable water - Rivers - Water supply - Watersheds Uncontrolled terms:Agricultural productions - Agricultural watersheds - Groundwater table depth - Hydrogeological conditions - Quality degradation - Shallow groundwater - Upper reaches of the yangtze rivers - Upper Yangtze River Classification code:403 Urban and Regional Planning and Development - 444 Water Resources - 446.1 Water Supply Systems - 453 Water Pollution - 481.1 Geology - 804.2 Inorganic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control Numerical data indexing:Percentage 3.00e+01% DOI:10.13227/j.hjkx.201912188 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008866 Title:Aerosol Optical Properties over the Ebinur Region Title of translation:艾比湖地区气溶胶光学特性分析 Authors:Zhang, Zhe (1, 2); Ding, Jian-Li (1, 2); Wang, Jin-Jie (1, 2) Author affiliation:(1) Key Laboratory of Smart City and Environment Modelling of Higher Education Institute, College of Resources and Environment Science, Xinjiang University, Urumqi; 830046, China; (2) Key Laboratory of Oasis Ecosystem Ministry of Education, Xinjiang University, Urumqi; 830046, China Corresponding author:Ding, Jian-Li(watarid@xju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3484-3491 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The key to understanding the transport and deposition process of salt dust to Ebinur Lake involves the quantitative evaluation of the aerosol concentration and characteristics in Jinghe County. Based on the data of the CE-318 sun photometer station in Jinghe County during 2019, the characteristics of the aerosol optical depth (AOD) and Angström exponent (α) were analysed. The results showed that the daily variation of the AOD in Jinghe County was a single peak curve that increased or decreased monotonously in the early/late peak period and peaked at 12: 00-14: 00, which was opposite to the trend of the α. There were obvious seasonal differences in the aerosol concentration and dominant mode. The seasonal AOD was ranked as: spring (0.403±0.282)>summer (0.222±0.135)>autumn (0.218±0.112), whereas α was ranked as: summer (1.339±0.446)>autumn (1.116±0.278)>spring (0.914±0.269). During the spring, the range of the change in the AOD was more intense, the aerosol particle size was larger than that during the summer and autumn, and the range of the variation in the particle size was larger. There was a negative correlation between the AOD and α. During the spring and summer, the aerosol particle size varied over a wide range, and the composition was more complex. With the decrease of the α, the AOD tended to increase; during the autumn, the dominant aerosol mode (mainly fine particles) stabilized, and the AOD exhibited no obvious change with the α. From spring to autumn, aerosol gradually transited from a coarse to fine mode. Compared with the summer, local aerosols were more sensitive to the changes of the wind speed, wind direction, and relative humidity during the spring. The primary reason for the increase of the AOD during the spring was the main wind direction and the dust input brought by gale weather. Influenced by the soluble salt ions in the dust, the aerosol particles were able to undergo hygroscopic growth, but this was not the main reason for the high AOD. Temperature was not the internal factor for the change in the local aerosols; however, it was directly proportional to the diffusion ability of aerosol particles. Overall, the AOD of Jinghe County was primarily affected by dust aerosols. The increases in the amounts of small particles and aerosol moisture absorption were not the main reasons for the increase of the AOD in this area.
© 2020, Science Press. All right reserved. Number of references:29 Main heading:Aerosols Controlled terms:Dust - Optical properties - Particle size - Springs (components) - Wind Uncontrolled terms:Aerosol concentration - Aerosol optical depths - Aerosol optical property - Aerosol particle sizes - Moisture absorption - Negative correlation - Quantitative evaluation - Seasonal differences Classification code:443.1 Atmospheric Properties - 451.1 Air Pollution Sources - 601.2 Machine Components - 741.1 Light/Optics DOI:10.13227/j.hjkx.202002096 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008936 Title:Pollution Characteristics and Health Risk Assessment of Heavy Metals in Road Dust from Non-ferrous Smelting Parks Title of translation:有色冶炼园区道路扬尘中重金属污染特征及健康风险评价 Authors:Feng, Yu-Yao (1); Shi, Jian-Wu (1); Zhong, Yao-Qian (1); Han, Xin-Yu (2); Feng, Yin-Chuan (1); Ren, Liang (1) Author affiliation:(1) Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming; 650500, China; (2) Faculty of Architectural Engineering, Kunming University of Science and Technology, Kunming; 650500, China Corresponding author:Shi, Jian-Wu(shijianwu2000@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3547-3555 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to explore the pollution characteristics and health risks of heavy metals in dust from roads around non-ferrous smelting activities in different regions, dust samples from urban roads, non-ferrous smelting industry park roads, and tunnel roads were collected from the Mengzi area of Yunnan Province. The dust samples were suspended on Teflon filters by re-suspension equipment to obtain PM2.5 and PM10 samples. Eight heavy metals (Cr, Mn, Ni, Cu, Zn, As, Cd, and Pb) were analyzed by ICP-MS. The results showed that the average content of the total heavy metals in PM2.5 was higher than that in PM10. The average contents of Pb, Cd, As, and Zn were highest in all three types of road dust, and the difference in the total average content in different types of road dust was ranked as: tunnel roads>non-ferrous smelting industrial park roads>urban roads. The average contents of Pb and As in PM2.5 from the tunnel road dust were higher than other heavy metals, and reached up to 92 338.3 mg•kg^-1 and 12 457.7 mg•kg^-1, respectively. The average contents of Pb and Zn in PM2.5from the industrial park road dust were the highest of all heavy metals (4 381. 7 mg•kg^-1 and 4 685.0 mg•kg^-1, respectively). The average content of Zn and Pb in PM2.5were the highest of all the heavy metals in the urban road dust (1 952.6 mg•kg^-1 and 1 944.8 mg•kg^-1, respectively). The average contents of Cu, Zn, As, Cd, and Pb in the different types of road dust were all higher than their background values in Yunnan Province. The results of the enrichment factor analysis and principal component analysis indicated that Cu, Zn, As, Cd, and Pb were obviously enriched in all three types of road dust, which were significantly affected by the non-ferrous smelting industry and traffic sources. In contrast, Cr, Mn, and Ni were not obviously enriched in the three types of road dust and were less affected by anthropogenic sources. The results of the health risk assessment testified that ingestion was the main exposure route, and that the children's non-carcinogenic risk was higher than that of adults. In PM2.5, As, Cd, and Pb in all types of road dust were associated with non-carcinogenic risks for adults and children. In PM10, As, Cd, and Pb in dust from the non-ferrous smelting industry park roads and tunnel roads had non-carcinogenic risks for humans. As in PM10 from the urban road dust was associated with a non-carcinogenic risk for children, whereas As in dust from the tunnel roads had carcinogenic risks.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Risk assessment Controlled terms:Air pollution - Dust - Health - Health risks - Heavy metals - Lead smelting - Roads and streets - Zinc smelting Uncontrolled terms:Anthropogenic sources - Background value - Carcinogenic risk - Enrichment factors - Industrial parks - Smelting activities - Smelting industry - Yunnan province Classification code:406.2 Roads and Streets - 451 Air Pollution - 451.1 Air Pollution Sources - 461.6 Medicine and Pharmacology - 461.7 Health Care - 531 Metallurgy and Metallography - 533.2 Metal Refining - 914.1 Accidents and Accident Prevention DOI:10.13227/j.hjkx.201911084 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008862 Title:Sorption Behaviors of Copper Ions and Tetracycline on Microplastics in Aqueous Solution Title of translation:微塑料对水中铜离子和四环素的吸附行为 Authors:Xue, Xiang-Dong (1, 2); Wang, Xing-Yuan (1); Mei, Yu-Chen (1); Zhuang, Hai-Feng (2); Song, Ya-Li (1, 2); Fang, Cheng-Ran (1, 2) Author affiliation:(1) School of Civil Engineering and Architectural, Zhejiang University of Science and Technology, Hangzhou; 310023, China; (2) Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Hangzhou; 310023, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3675-3683 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The interaction between microplastics, heavy metals, and antibiotics can lead to combined pollution, which could result in greater environmental damage. The pathway and mechanism of the interaction between microplastics, heavy metals, and antibiotics are the preconditions for evaluating the associated environmental risk; however, these are not well understood. As probe sorbates, the sorption behaviors of copper ions (Cu²⁺) and tetracycline (TC) on two microplastics [high density polyethylene (HPDE) and general-purpose polystyrene (GPPS)] in aqueous solution were investigated and the welding theory with relevant experimental results were discussed. The adsorption capacity of HDPE was greater than that of GPPS in a single Cu solution, whereas the reverse situation occurred in a single TC solution. Moreover, the adsorption capacity of the microplastics in a Cu²⁺-TC binary solution was larger than that in the single solutions. The pseudo-second-order kinetic models to describe the adsorption process were reasonable and the entire process could be divided into two phases: surface adsorption and internal diffusion. The Langmuir model provided a better fit of the data than did the Freundlich model. In the single solutions, the saturated adsorption amounts of Cu²⁺ and TC were 0.178 μmol•g^-1 and 0.257 μmol•g^-1, respectively, for GPPS, and 0.334 μmol•g^-1 and 0.194 μmol•g^-1, respectively, for HDPE. In the binary solution, the corresponding numerical values were 0.529 μmol•g^-1 and 0.411 μmol•g^-1, respectively, for GPPS and 0.471 μmol•g^-1 and 0.341 μmol•g^-1, respectively, for HDPE. The variations in the surface morphological characteristics and chemical functional groups were the main reasons for the difference in the adsorption behavior of microplastics. The variation of the pH of the adsorption system could change the existing forms and surface electrical properties of microplastics and adsorbed objects, and subsequently affected the equilibrium adsorption capacity. When the ambient temperature was in the range of 15 to 35℃, increasing the temperature was unfavorable for the adsorption process. Cu²⁺ and TC could produce a synergistic effect under the conditions of coexistence. The formation of complexes and bridging make Cu²⁺ and TC more easily adsorbed by microplastics.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Microplastic Controlled terms:Adsorption - Antibiotics - Copper - Environmental impact - Heavy metals - High density polyethylenes - Metal ions Uncontrolled terms:Adsorption behavior - Adsorption capacities - Chemical functional groups - Combined pollutions - Environmental damage - Equilibrium adsorption capacity - Morphological characteristic - Pseudo-second-order kinetic models Classification code:454.2 Environmental Impact and Protection - 461.6 Medicine and Pharmacology - 531 Metallurgy and Metallography - 531.1 Metallurgy - 544.1 Copper - 802.3 Chemical Operations - 815.1.1 Organic Polymers Numerical data indexing:Molality 1.78e-04mol/kg to 2.20e-02mol/kg, Molality 1.94e-04mol/kg to 2.20e-02mol/kg, Molality 2.57e-04mol/kg to 2.20e-02mol/kg, Molality 3.34e-04mol/kg to 2.20e-02mol/kg, Molality 3.41e-04mol/kg to 2.20e-02mol/kg, Molality 4.11e-04mol/kg to 2.20e-02mol/kg, Molality 4.71e-04mol/kg to 2.20e-02mol/kg, Molality 5.29e-04mol/kg to 2.20e-02mol/kg DOI:10.13227/j.hjkx.202002196 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371183 Title:Spatial and Temporal Distribution Characteristics of Levoglucosan and Its Isomers in PM2.5 in Beijing and Six Surrounding Cities Title of translation:北京及周边6个城市大气PM2.5中左旋葡聚糖及其异构体的时空分布特征 Authors:Zhu, Hong-Xia (1); Tao, Xue-Mei (2); Wang, Chao (1); Zhang, Lin-Lin (1); Zheng, Xiao-Yan (1) Author affiliation:(1) China National Environmental Monitoring Centre, Beijing; 100012, China; (2) Gansu Province Environmental Monitoring Centre, Lanzhou; 730030, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1544-1549 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Air PM2.5 samples from Beijing and six surrounding cities were collected during spring, summer, autumn, and winter. Levoglucosan (LG), mannosan (MN), and galactosan (GT) contents were analyzed by ion chromatography. The concentrations and distribution characteristics of the three anhydroglucoses with PM2.5 and organic carbon (OC) were compared. SPSS 24.0 was used to analyze the significant differences. The results indicated that the seasonal distributions of PM2.5, OC, and LG in the six cities were highly similar and followed the order winter>spring>autumn>summer. There were significant differences in the concentration levels of the three anhydroglucoses in the four seasons. Between Beijing and Tianjin, Baoding, and Shijiazhuang, there was no significant difference in the three anhydroglucose concentrations. However, significant differences in the three anhydroglucose concentrations appeared between Beijing, Ji'nan, and Zhengzhou. Based on the ratios of LG/MN and LG/(MN+GT) measured in the six cities, it could be determined that the biomass combustion sources in PM2.5 mainly came from crop straw and hardwood in this region. During the air pollution process in spring, LG stably existed in PM2.5 in Beijing, Tianjin, Shijiazhuang, and Ji'nan, indicating that this pollution process was weakly affected by biomass combustion.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Combustion Controlled terms:Ion chromatography - Isomers - Organic carbon - Pollution - Springs (components) Uncontrolled terms:Beijing and surrounding six cities - Galactosan - Levoglucosan - Mannosan(MN) - PM2.5 - Spatial and temporal distribution Classification code:601.2 Machine Components - 801 Chemistry - 804 Chemical Products Generally - 804.1 Organic Compounds DOI:10.13227/j.hjkx.201906029 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008935 Title:Characteristics and Source Apportionment of VOCs at Different Pollution Levels During the Winter in an Urban Area in Zhengzhou Title of translation:郑州市某城区冬季不同污染水平大气VOCs特征及源解析 Authors:Li, Yi-Dan (1); Yin, Sha-Sha (2); Zhang, Rui-Qin (2); Yu, Shi-Jie (1); Yang, Jian (1); Zhang, Dong (1) Author affiliation:(1) Research Institute of Environmental Science, College of Chemistry, Zhengzhou University, Zhengzhou; 450001, China; (2) College of Ecology and Environment, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Yin, Sha-Sha(shashayin@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3500-3510 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, volatile organic compound (VOC) species were measured at an urban site in Zhengzhou from January 3 to 23, 2019, to investigate the composition, variation characteristics, sources, and effects on secondary organic aerosol (SOA) formation of VOCs at different pollution levels. Results showed that oxygenated VOCs and alkanes were the main components of VOCs, while ethyl acetate and acetone were the most abundant species. During the process from clean days to heavy pollution days, the mixing ratio of VOCs approximately doubled, and the mixing ratios of most species continued to increase as the pollution level increased. Based on the positive matrix factorization (PMF) model, during the observation period, VOCs mainly originated from vehicle emissions, industrial emissions, combustion sources, solvent utilization, and liquefied petroleum gas (LPG) utilization. There were significant differences in the source contribution at different pollution levels, and the contributions of industrial emissions and solvent utilization during the heavy pollution days increased to 9 times and 3 times that of the clean days, respectively. With respect to the SOA formation potential (SOAp), aromatics were the component that contributed the most, and toluene and m/p-xylene were the species that contributed the most, while solvent utilization was the greatest source contributor. During the heavy pollution period, the total SOAp increased to approximately 2.6 times that of clean days. There is a great need to reduce winter haze pollution in Zhengzhou by strengthening the control of aromatic emissions and related sources such as solvent utilization.
© 2020, Science Press. All right reserved. Number of references:38 Main heading:Pollution control Controlled terms:Acetone - Factorization - Gas emissions - Industrial emissions - Liquefied petroleum gas - Mixing - Organic solvents - Urban growth - Volatile organic compounds Uncontrolled terms:Formation potential - Liquefied petroleum gas (LPG) - Positive matrix factorization models - Secondary organic aerosols - Source apportionment - Source contributions - Variation characteristics - Volatile organic compound (VOC) Classification code:403.1 Urban Planning and Development - 451.1 Air Pollution Sources - 523 Liquid Fuels - 802.3 Chemical Operations - 804.1 Organic Compounds - 921 Mathematics DOI:10.13227/j.hjkx.202001133 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861949 Title:Comparative Analysis of NOx Emission Characteristics of Non-Ultra-Low- and Ultra-Low-Emission Coal-Fired Power Units During the Start-Up Process Title of translation:非超低与超低排放煤电机组启动过程NOx排放特征对比分析 Authors:Li, Hui (1, 2); Zhu, Fa-Hua (1, 2); Sun, Xue-Li (2); Wang, Zong-Shuang (3); Wang, Sheng (2); Pei, Jie (1); Tan, Yu-Fei (3); Xue, Feng (1); Guo, Min (3); Zheng, Gui-Bo (4) Author affiliation:(1) Guodian Science and Technology Research Institute Co., Ltd., Nanjing; 210023, China; (2) State Power Environmental Protection Institute, Nanjing; 210031, China; (3) Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (4) Guodian Longyuan Power Technology Engineering Co., Ltd., Beijing; 100039, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3121-3129 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the NOx emission information of 671 coal-fired power units, the NOx emission characteristics of non-ultra-low-emission (non-ULE) and ultra-low-emission (ULE) coal-fired power units during the start-up process were compared and analyzed. The results showed that in the start-up stage of non-ULE units, the exceeding standard rate (ESR) of NOx emission concentration was 81.53%, the average exceeding standard hours (ESHs) was 2.64 h, and the average maximum emission hourly mean concentration (MEHC) was 284.06 mg•m^-3. The NOx ESR of ULE units was 79.86%, the average ESHs was 2.52 h, and the average MEHC was 231.61 mg•m^-3. There was no significant difference in the ESR and the average ESHs between non-ULE and ULE units, but the difference in the average MEHC was significant. There was no significant difference in the ESR, average ESHs, and average MEHC between different grades of non-ULE units, except that the average MEHC of 300 MW units was significantly lower than that of 200 MW units. There was statistical difference in the ESR, average ESHs, and average MEHC among different grades of ULE units, and 600 MW units performed best in the ESHs control, whereas 1 000 MW units performed best in the emission concentration control.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Nitrogen oxides Controlled terms:Coal Uncontrolled terms:Coal-fired power unit - Comparative analysis - Emission concentration - Maximum emissions - Mean concentrations - Start-up process - Start-up stage - Statistical differences Classification code:524 Solid Fuels - 804.2 Inorganic Compounds Numerical data indexing:Percentage 7.99e+01%, Percentage 8.15e+01%, Power 1.00e+09W, Power 2.00e+08W, Power 3.00e+08W, Power 6.00e+08W, Time 9.07e+03s, Time 9.50e+03s DOI:10.13227/j.hjkx.201910188 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658170 Title:Spatial-temporal Distribution of Nutrients in Hanfeng Lake After Official Operation Title of translation:汉丰湖正式运行年水体营养盐分布特征 Authors:Fu, Shi (1); Ni, Jiu-Pai (1); He, Bing-Hui (1); Li, Tian-Yang (1); Tang, Yi (2); Qian, Tian (1); Xiang, Ke-Cui (3) Author affiliation:(1) Key Laboratory of Eco-environment in the Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) College of Animal Science, Southwest University, Chongqing; 400715, China; (3) Environmental Monitoring Station, Kaizhou District, Kaizhou, Chongqing; 405400, China Corresponding author:He, Bing-Hui(hebinghui@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2116-2126 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The hydrograph of Hanfeng Lake, which is the largest pre-dam of theThree Gorges Reservoir, varied between the fluvial stage and lake stage after the lake was officially operated, resulting in large shifts in the aquatic biogeochemical processes. To explore the spatial-temporal distribution of nitrogen and phosphorus concentrations and identify their influencing factors in Hanfeng Lake, seven sampling sites were set up to monitor the changes of nutrients and other water indicators at different water depths monthly from January to December 2018. The results showed that completely vertical mixing across water profiles was observed. The nutrient concentrations were not significantly different between the top, middle, and bottom water depths (P>0.05). Total nitrogen concentration decreased from January to September but gradually increased from October to December, with a monthly average concentration of 1.52 mg•L^-1. NO2^--N concentration decreased in the first four months, increased sharply from May to June, and decreased from July to December with a monthly average concentration of 0.05 mg•L^-1. NO3^--N concentration gradually decreased from January to June, and gradually increased from July to December. NH4⁺-N concentration was the highest in July, with a concentration of 0.44 mg•L^-1, and the change in other months was not notable, with a monthly average concentration of 0.09 mg•L^-1. The concentrations of total phosphorus (TP), dissolved phosphorus, and soluble reactive phosphorus showed insignificant changes in trends throughout the year, with monthly average concentrations of 0.17 mg•L^-1, 0.11 mg•L^-1, and 0.05 mg•L^-1, respectively. The phosphate concentration was mainly sourced from the upstream Nan River and Taoxi River, and gradually decreased from upper Zhendong to the downstream regulating dam. Of these nutrients, TP was the key factor in the growth of algae in Hanfeng Lake.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Reservoirs (water) Controlled terms:Lakes - Nitrogen - Nutrients - Phosphorus - Rivers Uncontrolled terms:Average concentration - Biogeochemical process - Dissolved phosphorus - Nitrogen and phosphorus - Nutrient concentrations - Phosphate concentration - Soluble reactive phosphorus - Spatial-temporal distribution Classification code:441.2 Reservoirs - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.10e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 1.52e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 1.70e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 4.40e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 9.00e-05kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201910119 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861998 Title:Contribution of Emissions from the Iron and Steel Industry to Air Quality in China Title of translation:中国钢铁行业大气环境影响 Authors:Tang, Ling (1, 2); Xue, Xiao-Da (1, 3); Bo, Xin (3); Jia, Min (2, 3); Guo, Jing (1, 3); Tian, Jun (4); Huang, Man-Tang (4); Cui, Wei-Geng (5); Wang, Tong (6); Li, Shi-Bei (3); Jing, Hong (7); Zhen, Rui-Qing (8); Sun, Lu (9); Cheng, Guo-Qing (10) Author affiliation:(1) School of Economics and Management, Beihang University, Beijing; 100191, China; (2) School of Economics and Management, Beijing University of Chemical Technology, Beijing; 100029, China; (3) Appraisal Centre for Environment and Engineering, Ministry of Ecology and Environment, Beijing; 100012, China; (4) Academy of Environmental Planning & Design, Co., Ltd., Nanjing University, Nanjing; 210093, China; (5) School of Earth Sciences and Resources, Chang'an University, Xi'an; 710054, China; (6) Shaanxi Environmental Investigation and Assessment Center, Xi'an; 710000, China; (7) China National Environmental Monitoring Centre, Beijing; 100012, China; (8) MCC Capital Engineering & Research Incorporation Limited, Beijing; 100176, China; (9) Center for Social and Environmental Systems Research, National Institute for Environmental Studies, Ibaraki; 305-8506, Japan; (10) Hebei Zhengrun Environmental Technology Co., Ltd., Shijiazhuang; 050091, China Corresponding author:Bo, Xin(boxinet@gmail.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:2981-2994 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Based on the data from a continuous emission monitoring systems network in 2015, this study analyzed the compliance rates of exhaust gas in the processes of China's iron and steel industry, and established a high-resolution steel plant emission inventory for China (HSEC, 2015), based on the bottom-up method. The contribution of emissions from the iron and steel industry to regional air quality was quantitatively simulated using a CAMx model. The results showed that in 2015, the total emissions of SO2, NOx, PM10, PM2.5, PCDD/Fs, VOCs, CO, BC, OC, EC, and F were 374 800 t, 720 500 t, 334 800 t, 150 300 t, 1.91 kg, 842 900 t, 34 788 500 t, 6 400 t, 8 300 t, 800 t, and 7 700 t, respectively. From a regional perspective, the iron and steel industry in Shanghai and Tianjin has the highest emission intensity per unit area and contributes a high proportion to regional air pollution. From a process perspective, in 2015, the exhaust concentration of flue gas in the main process gradually decreased, with a high compliance rate, and the emission factor significantly decreased to lower than that in the existing research results. From a species perspective, in 2015, NOxemission from the steel industry contributed the most to regional air quality, and there is therefore a great emission reduction potential for NOx.
© 2020, Science Press. All right reserved. Number of references:47 Main heading:Iron and steel industry Controlled terms:Air quality - Emission control - Nitrogen oxides - Regulatory compliance - Steelmaking Uncontrolled terms:Bottom up methods - Continuous emission monitoring system - Emission factors - Emission intensity - Emission reduction potentials - High compliances - Regional air pollution - Regional air quality Classification code:451.2 Air Pollution Control - 545 Iron and Steel - 545.3 Steel - 804.2 Inorganic Compounds Numerical data indexing:Mass 1.91e+00kg DOI:10.13227/j.hjkx.201912166 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658129 Title:Influence of Secondary Organic Coating on Hygroscopicity of a Sodium Chloride Core: Based on Mircro-scale Single Particle Analysis Title of translation:二次有机气溶胶壳对氯化钠核吸湿性的影响: 基于单颗粒微观尺度 Authors:Zhang, Shu-Jia (1); Xu, Liang (1); Guo, Xin-Mei (2); Huang, Dao (1); Li, Wei-Jun (1) Author affiliation:(1) Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou; 310027, China; (2) Department of Environment Engineering, Zhongyuan Institute of Technology, Zhengzhou; 450007, China Corresponding author:Li, Wei-Jun(liweijun@zju.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2017-2025 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The hygroscopicity of atmospheric particulate matter can determine its optical behaviors, cloud condensation nuclei activity, and heterogeneous chemical reaction on the surface. However, the effect of secondary organic matter on the hygroscopicity of inorganic salts is still rarely studied. In this study, a 2 L gas-phase flow tube was used to stimulate the oxidation process of α-pinene. NaCl particles at the end of the flow tube served as seeds to absorb the product of α-pinene oxidation. The absorption times were 11, 15, and 20 h. Transmission electron microscopy results show that this system could produce particles with typical core-shell structure, and that the thickness of the organic shell would be thicker with longer collection time. Results from individual particle hygroscopic systems indicate that the organic shell can affect the deliquescent point of NaCl (pure NaCl deliquesces at 77%): for 11 h collection time, the NaCl core began to deliquesce at 75.5% relative humidity, and completely deliquesced at 78%; for 15 h collection time, the deliquescent range of the NaCl core was 75%-78.5%; and the deliquescent range was 76%-83% for the NaCl core with 20 h collection time. Furthermore, the organic shell could affect the hygroscopic growth of the NaCl core: the growth factor of the NaCl core with 11 h, 15 h, and 20 h collection time was 2.5, 2.3, and 1.8, respectively. These results indicate that: ① the secondary organic shell could cause water absorption of the NaCl core in advance: ② the organic shell could postpone the completely deliquescent point of the NaCl core, and this effect is more obvious with a thicker organic shell; ③ the organic shell could restrain the hygroscopic growth factor of the NaCl core. This study suggests that it is necessary to consider the influence of secondary organic matter on inorganic salts when studying the hygroscopic properties of atmospheric particles in climate models and field observations.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Sodium chloride Controlled terms:Atmospheric chemistry - Atmospheric humidity - Biogeochemistry - Climate models - High resolution transmission electron microscopy - Monoterpenes - Olefins - Organic coatings - Particles (particulate matter) - Shells (structures) - Surface reactions - Water absorption Uncontrolled terms:Atmospheric particles - Atmospheric particulate matter - Cloud condensation nuclei - Heterogeneous chemical reaction - Hygroscopic growth factor - Hygroscopic properties - Individual particles - Single-particle analysis Classification code:408.2 Structural Members and Shapes - 443 Meteorology - 443.1 Atmospheric Properties - 481.2 Geochemistry - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.1 Organic Compounds - 921 Mathematics - 951 Materials Science Numerical data indexing:Percentage 7.55e+01%, Percentage 7.60e+01% to 8.30e+01%, Percentage 7.70e+01%, Time 3.96e+04s, Time 5.40e+04s, Time 7.20e+04s, Volume 2.00e-03m3 DOI:10.13227/j.hjkx.201908237 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203209008956 Title:Universality and Potential Application of Mn(Ⅱ) Oxidation Triggered by Microbial Interspecies Interactions Title of translation:微生物种间相互作用产生锰氧化的普适性及其潜在应用 Authors:Ning, Xue (1); Liang, Jin-Song (2); Bai, Yao-Hui (2); Liao, Kai-Ling-Li (3); Liu, Hui-Juan (1); Qu, Jiu-Hui (1, 2) Author affiliation:(1) Center for Water and Ecology, Tsinghua University, Beijing; 100084, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Foreign Economic Cooperation Office, Ministry of Ecology and Environment, Beijing; 100035, China Corresponding author:Qu, Jiu-Hui(jhqu@tsinghua.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:8 Issue date:August 15, 2020 Publication year:2020 Pages:3781-3786 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Mn(Ⅱ)-oxidizing microorganisms can catalytically increase the oxidation rate of divalent manganese by several orders of magnitude, and affect the valence state and fate of elemental manganese. In addition to Mn(Ⅱ)-oxidization by a single microbial strain, our previous studies revealed that interspecies interactions between two bacterial strains (Sphingopyxis sp. QXT-31 and Arthrobacter sp. QXT-31) could trigger the Mn(Ⅱ)-oxidizing activities of Arthrobacter sp. QXT-31. In order to further explore its universality, mechanism, and potential engineering applications, research was conducted on three other Sphingopyxis strains using culture-dependent experiments, comparative genomic analysis, and transcriptome analysis. The results showed that one Sphingopyxis strain could also trigger the Mn(Ⅱ)-oxidizing activity of Arthrobacter sp. QXT-31, which could be regarded as a hint for the prevalence of Mn(Ⅱ) oxidation triggered by microbial interspecies interactions in the natural environment. Furthermore, the upregulation of the antibiotic synthesis pathway in Sphingopyxis was observed just before the Mn(Ⅱ)-oxidizing activity of Arthrobacter sp. QXT-31 was triggered, thus suggesting its possible involvement in stimulating the Mn(Ⅱ)-oxidizing activity of Arthrobacter sp. QXT-31. Finally, we demonstrated that using microbial interspecies interactions to enhance the oxidative removal of Mn(Ⅱ) in a manganese removal reactor is potentially feasible.
© 2020, Science Press. All right reserved. Number of references:31 Main heading:Oxidation Uncontrolled terms:Antibiotic synthesis - Comparative genomic - Engineering applications - Interspecies interactions - Natural environments - Orders of magnitude - Oxidizing activity - Transcriptome analysis Classification code:802.2 Chemical Reactions DOI:10.13227/j.hjkx.202001035 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204709517728 Title:Enhanced Dewaterability of Waste-Activated Sludge in Presence of Fe(Ⅱ)-Activated Calcium Peroxide Title of translation:二价铁活化过氧化钙提高剩余活性污泥的脱水性能 Authors:Bi, Wei-Wei (1); Ruan, Shu-Yu (1); Chen, Wu-Ao-Xiao (1); Liang, Fang-Yi (1); Chen, Zhi-Wen (1); Xie, Song-Ru (1); Tang, Jing (2); Deng, Jing (1) Author affiliation:(1) College of Civil Engineering, Zhejiang University of Technology, Hangzhou; 310014, China; (2) MMC Huatian Engineering & Technology Corporation, Nanjing; 210019, China Corresponding author:Deng, Jing(zjut_djing@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:12 Issue date:December 15, 2020 Publication year:2020 Pages:5544-5551 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Ferrous iron-activated calcium peroxide (Fe²⁺/CaO2) was innovatively put forward to improve the dewaterability of waste-activated sludge. The effects of initial pH, Fe²⁺, and CaO2dosages on sludge dewatering performance were investigated and its internal mechanism for achieving deep sludge dewatering was thoroughly explored. The results indicated that the best dewatering performance was obtained by dosing 3.31 mmol•g^-1 Fe²⁺ and 3.68 mmol•g^-1 CaO2 under neutral pH, in which specific resistance to filtration (SRF) and water content (WC) reduced from 20.99×10¹² m•kg^-1 and 86.61% to 3.91×10¹² m•kg^-1 and 76.15%, respectively. Fe²⁺/CaO2 oxidation caused sludge microbial cell lysis, release of intracellular organic matter, and degradation of extracellular polymeric substances (EPS). Meanwhile, the generated Fe³⁺ facilitated re-flocculation of sludge particles into rigid and porous structure flocs, which was beneficial to the release of EPS-bound water to achieve deep sludge dewatering. From the perspective of technology and economy, the Fe²⁺/CaO2 process is economical and practical, and has a promising application prospect in improving the dewatering performance of waste-activated sludge.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Activated sludge process Controlled terms:Calcium compounds - Dewatering - Iron compounds - Oxidation - Peroxides - Water filtration Uncontrolled terms:Application prospect - Dewatering performance - Extracellular polymeric substances - Intracellular organic matters - Porous structures - Sludge dewatering - Specific resistance to filtration - Waste activated sludges Classification code:452.2 Sewage Treatment - 802.2 Chemical Reactions - 802.3 Chemical Operations Numerical data indexing:Percentage 7.62e+01% DOI:10.13227/j.hjkx.202004180 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106088 Title:Interactions of Fungi Community and Relationship with the Carbon Structure in Arable Mollisols with Gradient Organic Matter Content Title of translation:黑土真菌群落互作及其与梯度有机质碳分子结构的关系 Authors:Shang, Qiu-Tong (1); Huang, Rui-Lin (2); H.-W., Ni; Y.-Y., Sui; B., Sun; Y.-T., Liang Author affiliation:(1) School of Environmental and Safety Engineering, Changzhou University, Changzhou; 213164, China; (2) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (3) Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin; 150081, China Corresponding author:Liang, Yu-Ting(ytliang@issas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4305-4313 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Fungi play an important role in the accumulation and transformation of soil organic matter (SOM) and nutrient cycling. To investigate the relationship between the fungal community and soil organic carbon functional groups under gradient SOM contents in arable mollisols, arable mollisols with 2%-9% SOM content were collected in Northeast China. Solid-state ¹³C-NMR technology was used to explore the differences in the functional group structure of SOM, and ITS high-throughput sequencing was used to investigate the fungal community structure. The potential interactions between different taxonomic groups of soil fungal community and their associations with organic carbon molecular structures were compared by constructing molecular ecological networks under low SOM (2%-5%) and high SOM (7%-9%) conditions. The ¹³C-NMR results indicated an increase in the relative abundance of Alkyl C (25.8% to 35.9%). The decrease in Alkyl C/O-Alkyl C indicated a smaller degree of decomposition in high SOM soils. Sordariomycetes and Mortierellomycotina dominated the fungal community and their relative abundance increased with the SOM gradient (P<0.05) from 14.33% to 28.17% and from 7.32% to 23.14%, respectively. The network analysis showed simpler ecological topological properties of the fungal community in low SOM soils, with lower numbers of nodes, edges, and average clustering coefficients than those in high SOM soils. A closer relationship between fungi and organic carbon functional groups, especially LOC, was observed in low SOM soils. The random forest model showed that LOC had the largest amount for fungal interactions in low SOM soils (10%), followed by recalcitrant organic carbon (ROC). In comparison, LOC contributed less to the variations in fungal interactions in high SOM soils (7.4%). With globally increasing soil carbon loss, the limition of the carbon resources, especially the reduction of LOC, may reduce the stability and ecological functions of soil fungal communities.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Fungi Controlled terms:Agriculture - Association reactions - Biogeochemistry - Decision trees - Ecosystems - Organic carbon - Self organizing maps - Soils - Topology Uncontrolled terms:Clustering coefficient - Degree of decomposition - High-throughput sequencing - Organic carbon functional groups - Organic matter content - Random forest modeling - Soil fungal communities - Topological properties Classification code:454.3 Ecology and Ecosystems - 481.2 Geochemistry - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804.1 Organic Compounds - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory Numerical data indexing:Percentage 1.00e+01%, Percentage 1.43e+01% to 2.82e+01%, Percentage 2.00e+00% to 5.00e+00%, Percentage 2.00e+00% to 9.00e+00%, Percentage 2.58e+01% to 3.59e+01%, Percentage 7.00e+00% to 9.00e+00%, Percentage 7.32e+00% to 2.31e+01%, Percentage 7.40e+00% DOI:10.13227/j.hjkx.202003037 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256341 Title:Characterization and Source Apportionment of PM2.5 Based on the Online Observation in Tianjin Title of translation:基于在线观测的天津市PM2.5污染特征及来源解析 Authors:Xiao, Zhi-Mei (1); Xu, Hong (1); Li, Li-Wei (1); Li, Peng (1); Yuan, Jie (1); Tang, Miao (1); Yang, Ning (1); Zheng, Nai-Yuan (1); Chen, Kui (1) Author affiliation:(1) Tianjin Eco-Environmental Monitoring Center, Tianjin; 300191, China Corresponding author:Tang, Miao(tangmiao32@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4355-4363 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To study the characterization and source apportionment of PM2.5 in Tianjin, based on high-resolution online monitoring data from 2017 to 2019, the concentrations and its chemical compositions and sources of PM2.5 were analyzed. The results showed that the average concentration of PM2.5 was 61 μg•m^-3. The primary chemical compositions of PM2.5 were nitrate, organic carbon (OC), ammonium, sulfate, elemental carbon (EC), and Cl^- and their corresponding mass percentages to PM2.5 were 17.7%, 12.6%, 11.5%, 10.7%, 3.4%, and 3.1%, respectively. From 2017 to 2019, the concentrations of PM2.5 and its main chemical compositions exhibited a decreasing trend; the mass ratios of NO3^- and NH4⁺ to PM2.5 exhibited an increasing trend, while the mass ratios of SO4^2-, OC, and EC to PM2.5 exhibited a decreasing trend; further, the mass ratio of Cl^- exhibited a slight increasing trend. The concentrations of K⁺, Ca²⁺, and Na⁺ and their mass percentages to PM2.5 increased. The concentrations of PM2.5 and its primary components were relatively higher during heating season, and relatively lower during non-heating season. High values of SOR and NOR indicated that the secondary transformation of nitrate and sulfate played an important role during summer and autumn, which resulted in higher mass percentages of secondary inorganic ions (NO3^-, SO4^2-, and NH4⁺) to PM2.5 during summer and autumn. When the PM2.5 concentrations were at excellent levels, the mass ratios of the secondary inorganic ions to PM2.5 were relatively lower, the mass ratios of OC, Ca²⁺, and Na⁺ to PM2.5 were relatively higher, and secondary organic carbon (SOC) was high. When the PM2.5 concentrations were between light pollution to heavy pollution levels, as the pollution levels increased, the mass percentages of secondary inorganic ions, OC, EC, and Cl^-, and other components (K⁺, Ca²⁺, and Na⁺) showed a significant increasing trend, relatively stable level, slightly increasing trend, and decreasing trend, respectively. When PM2.5 concentrations were between moderate pollution to heavy pollution levels, the influence of vehicle emission increased significantly. The source apportionment of PM2.5 were analyzed using the positive matrix factorization model. The major sources of PM2.5 in Tianjin were secondary source, vehicle exhaust, industrial and coal combustion emissions, and crustal dust. From 2017 to 2019, the contribution of vehicle exhaust increased, and the contribution of secondary source and crustal dust showed a slight increasing trend, while the contribution of industrial and coal combustion emissions decreased. For Tianjin, vehicle exhaust and industrial and coal combustion emissions were the primary sources of PM2.5. The adjustment of industrial and energy structure and management and control of vehicle exhaust are the main directions for air pollution control in Tianjin.
© 2020, Science Press. All right reserved. Number of references:62 Main heading:Coal combustion Controlled terms:Air pollution - Air pollution control - Chemical analysis - Coal - Coal dust - Factorization - Industrial emissions - Ions - Nitrates - Organic carbon - Sulfur compounds - Vehicles Uncontrolled terms:Average concentration - Chemical compositions - Combustion emissions - Management and controls - On-line observations - Positive matrix factorization models - Secondary organic carbons (SOC) - Secondary transformation Classification code:451 Air Pollution - 524 Solid Fuels - 804.1 Organic Compounds - 804.2 Inorganic Compounds - 921 Mathematics Numerical data indexing:Percentage 1.07e+01%, Percentage 1.15e+01%, Percentage 1.26e+01%, Percentage 1.77e+01%, Percentage 3.10e+00%, Percentage 3.40e+00% DOI:10.13227/j.hjkx.202001185 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105520 Title:Characteristics and Source Apportionment of Carbon Components in Road Dust in Anshan Title of translation:鞍山市道路扬尘碳组分特征及来源解析 Authors:Lin, Zi (1); Ji, Ya-Qin (1); Lin, Yu (1); Guo, Ji-Liang (1); Ma, Yan (1); Zhao, Jing-Qi (1) Author affiliation:(1) College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China Corresponding author:Ji, Ya-Qin(jiyaqin@nankai.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:3918-3923 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In order to study the characteristics and sources of carbon fractions in PM2.5 in road dust in Anshan, road dust samples were collected from nine roads in Anshan in October 2014 and re-suspended on filters using a NK-ZXF sampler to obtain PM2.5 samples. A thermal optical carbon analyzer (IMPROVE-TOR) was employed to measure the mass fraction of organic carbon (OC) and elemental carbon (EC) in PM2.5. The results showed that ω(TC) in PM2.5 in road dust was 9.78% (outer loop)-14.00% (Qianshan West Road), ω(OC) was 8.15% (outer loop)-10.84% (Qianshan West Road), and ω(EC) was 1.63% (outer loop)-2.85% (Qianshan West Road). ω(OC) was much higher than ω(EC), indicating that road dust contained a large amount of organic carbon. All OC/EC values were greater than 2.0 during the sampling period, suggesting that there was secondary pollution. Spearman correlation analysis and linear fitting indicated that the sources of OC and EC were basically the same. Cluster analysis results showed that carbon components in PM2.5 in road dust in Anshan mainly originated from vehicle exhaust, biomass burning, and coal combustion emissions.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Organic carbon Controlled terms:Cluster analysis - Coal combustion - Coal dust - Roads and streets - Thermal conductivity Uncontrolled terms:Combustion emissions - Elemental carbon - Road dust samples - Secondary pollution - Source apportionment - Spearman correlation - Thermal-optical carbon analyzer - Vehicle exhausts Classification code:406.2 Roads and Streets - 503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 641.1 Thermodynamics - 723 Computer Software, Data Handling and Applications - 804.1 Organic Compounds Numerical data indexing:Percentage 1.63e+00%, Percentage 8.15e+00%, Percentage 9.78e+00% DOI:10.13227/j.hjkx.202002049 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509106112 Title:Spatial-temporal Variations and Driving of Nitrogen and Phosphorus Ratios in Lakes in the Middle and Lower Reaches of Yangtze River Title of translation:长江中下游湖泊水体氮磷比时空变化特征及其影响因素 Authors:Ji, Peng-Fei (1, 2); Xu, Hai (2); Zhan, Xu (1); Zhu, Guang-Wei (2); Zou, Wei (2); Zhu, Meng-Yuan (2); Kang, Li-Juan (2) Author affiliation:(1) School of Environment and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Taihu Laboratory for Lake Ecosystem Research, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Zhan, Xu(xuzhan@jiangnan.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4030-4041 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In spring and summer of 2018, 26 lakes in the middle and lower reaches of the Yangtze River were studied to determine the temporal and spatial characteristics of nitrogen and phosphorus ratios (TN/TP) and their influencing factors. The differences in nitrogen and phosphorus ratios in different types of lakes (including water-psaaing lakes, deep reservoirs and eutrophic lakes) and in different seasons were analyzed in terms of the sources of the lakes, lake depth, suspended particulate matter concentrations, and phytoplankton levels. The average TN/TP was 21.52±14.28 in spring and 21.73±23.78 in summer. The TN/TP varied significantly in different types of lakes. The TN/TP ratios in water-passing lakes, deep reservoirs and eutrophic lakes were 20.41±9.25, 40.97±33.37, and 14.38±7.40 during spring, and were 22.62±6.48, 96.38±45.91, and 10.91±4.44 during summer, respectively. The TN/TP of the water-passing lakes and deep reservoirs increased significantly in summer, while that of the eutrophic lakes decreased significantly, which indicates that TN/TP changes and lake nutritional status are closely related. The source of nutrients in lakes and reservoirs affects the TN/TP. The TN/TP of lakes and reservoirs had a significant correlation with the lake depth in both spring and summer, indicating that lake depth is a key factor affecting the ratio of nitrogen and phosphorus. In addition, in eutrophic lakes with higher absolute nutrient concentrations, TN/TP has less effect on phytoplankton, while in deep-water lakes with lower absolute nutrient concentrations, TN/TP can determine the growth of phytoplankton limited by phosphorus. Therefore, the governance strategy of lakes in the middle and lower reaches of the Yangtze River should prioritize phosphorus control. Local digging, controlling non-point source pollution, sediment dredging, and changing fishery production methods can be applied to improve the ecological quality of the eutrophic lakes.
© 2020, Science Press. All right reserved. Number of references:57 Main heading:Lakes Controlled terms:Dredging - Eutrophication - Nitrogen - Nutrients - Phosphorus - Phytoplankton - Quality control - Reservoirs (water) - River pollution - Rivers - Springs (components) Uncontrolled terms:Lake sand reservoirs - Middle and lower reaches of the yangtze rivers - Middle and lower reaches of yangtze rivers - Nitrogen and phosphorus - Non-point source pollution - Nutrient concentrations - Suspended particulate matters - Temporal and spatial Classification code:441.2 Reservoirs - 453 Water Pollution - 471 Marine Science and Oceanography - 601.2 Machine Components - 804 Chemical Products Generally - 913.3 Quality Assurance and Control DOI:10.13227/j.hjkx.202002017 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990475 Title:Hydrochemical and Isotopic Characteristics of the Lake Balkhash Catchment, Kazakhstan Title of translation:巴尔喀什湖流域水化学和同位素空间分布及环境特征 Authors:Shen, Bei-Bei (1); Wu, Jing-Lu (2); Abuduwaili, Jilili (3); Saparov, A.S. (4); Isanova, Gulnura (4) Author affiliation:(1) College of Environmental Science and Engineering, Yangzhou University, Yangzhou; 225127, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi; 830011, China; (4) Institute of Soil Science, Kazakhstan Ministry of Agriculture, Almaty; 050060, Kazakhstan Corresponding author:Wu, Jing-Lu(w.jinglu@niglas.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:173-182 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Lake Balkhash is one of the largest lakes in the world. It is located in arid Central Asia and receives major water from the Ili River, which is an international river flowing across China and Kazakhstan. Hydrochemical and isotopic measurements of waters can provide an improved understanding of hydrogeochemical processes and environmental characteristics, which is useful for water resource management in arid regions. In this study, δD, δ¹⁸O, and major ions in water samples from the Lake Balkhash catchment were analyzed using an integration of mathematical statistics, Piper diagrams, Gibbs model, and principal component analysis (PCA). Water types and main mechanisms controlling the hydrochemistry presented a clear spatial heterogeneity. The chemical composition of lake waters was dominated by SO4-Na and Cl-Na type, whereas river waters were classified as a HCO3-Ca type. The chemical composition downstream of the Ili River evolved from HCO3-Ca to SO4-Na-Cl type. Gibbs model suggested that the main mechanisms controlling the lake water chemistry were evaporation-crystallization processes, and that major ions in the river water were affected by rock-weathering and evaporation processes. The main controlling factors of the water chemistry changed from the upstream to the downstream, and may have related to spatial differences whereby the upstream area experienced higher rainfall and snow melt, and the downstream area experienced relatively higher evaporation. PCA analysis showed that human activities also played an important role in the chemical composition of water sampled from the lake, middle and lower reaches of the Ili River, and other rivers. The isotopic compositions of the lake and river waters varied spatially. In the lake waters, positive isotopic ratios and negative deuterium-excess values indicated that evaporitic enrichment dominated the changes in the isotopic signature of the lake water. In river waters, isotope values located near the global meteoric water line (GMWL) and lower slopes of the regression lines (r=0.91, P<0.001 for Ili River, and r=0.63, P<0.001 for other rivers), were associated with a stronger influence of rainfall and weaker evaporation. Correlation analysis showed that there were significant relationships between isotope values and chemical parameters in the lake water, especially in the eastern area, thus suggesting that extensive evaporation led to simultaneous enrichment of isotopes and ions in the lake water.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Rivers Controlled terms:Catchments - Chemical analysis - Chlorine compounds - Evaporation - Hydrochemistry - Ions - Isotopes - Lakes - Process control - Rain - Runoff - Sodium compounds - Statistics - Water management - Weathering Uncontrolled terms:Chemical compositions - Crystallization process - Environmental characteristic - Hydrogeochemical process - Isotopic characteristics - Main controlling factors - Simultaneous enrichment - Waterresource management Classification code:442.1 Flood Control - 443.3 Precipitation - 481.2 Geochemistry - 802.3 Chemical Operations - 922.2 Mathematical Statistics DOI:10.13227/j.hjkx.201905220 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990469 Title:Substructure Characteristics of Combined Acid-Base Modified Sepiolite and Its Adsorption for Cd(Ⅱ) Title of translation:酸碱复合改性海泡石亚结构特征及其对Cd(Ⅱ)吸附性能 Authors:Xie, Sha (1, 2); Xu, Ying-Ming (1, 2); Yan, Cui-Xia (1, 3); Luo, Wen-Wen (1, 2); Sun, Yue-Bing (1, 2) Author affiliation:(1) Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (2) Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China; (3) College of Grassland and Environment Sciences, Xinjiang Agricultural University, Urumqi; 830052, China Corresponding author:Sun, Yue-Bing(sunyuebing@aepi.org.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:293-303 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To enhance the adsorption capacity of sepiolite (Sep) on Cd²⁺ in solution, an acid-base Sep (ABsep) was obtained using the method of combined acid-base modification. The structural properties of Sep and ABsep were analyzed by adsorption-desorption isotherms of N2, scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray powder diffraction (XRD). Static adsorption experiments were carried out to evaluate the effects of time, mass ratio of ABsep/Cd²⁺, temperature, adsorbent dose, pH, and co-existing ions on the adsorption of Cd²⁺ by ABsep. The results showed that the pore structure of the ABsep was more developed than that of Sep. In comparison to Sep, the specific surface area, average pore diameter, and pore volume of ABsep increased by 66.1%, 15.7%, and 34.8%, respectively, and the exchangeable ion contents also increased. The main components of the ABsep were SiO2and Mg(OH)2. The adsorption process of Cd²⁺ by Sep and ABsep could be well fitted with a pseudo-second-order kinetic equation and Langmuir isotherm, and both were spontaneous endothermic reactions, which were mainly chemical adsorption along with physical adsorption. The best mass ratio of ABsep:Cd²⁺ was 3:1, and the maximum saturated adsorption capacity fitted by the Sips model of the ABsep on Cd²⁺ at 298 K was 142.43 mg•g^-1, which was 3.55 times that of Sep. As the adsorbent dose increased, the adsorption amounts of Cd²⁺ first increased and then decreased, with the optimum dose being 0.3 g•L^-1. The amount of Cd²⁺ adsorption by the ABsep increased with the initial pH of the solution, whereby the best pH was 7. We also found that the presence of K⁺, Na⁺, Mg²⁺, and Ca²⁺ at different concentrations could inhibit the adsorption of Cd²⁺, whereby the inhibition of Mg²⁺ was the highest.
© 2020, Science Press. All right reserved. Number of references:43 Main heading:Adsorption Controlled terms:Adsorption isotherms - Energy dispersive spectroscopy - Fourier transform infrared spectroscopy - High resolution transmission electron microscopy - Integral equations - Magnesium compounds - Pore structure - Scanning electron microscopy - X ray powder diffraction Uncontrolled terms:Adsorption capacities - Adsorption desorption isotherms - Chemical adsorption - Endothermic reactions - Energy dispersive X ray spectroscopy - Physical adsorption - Pseudo second order kinetics - Saturated adsorption capacity Classification code:741.3 Optical Devices and Systems - 801 Chemistry - 802.3 Chemical Operations - 921.2 Calculus - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Mass_Density 3.00e-01kg/m3 to 2.20e-02kg/m3, Percentage 1.57e+01%, Percentage 3.48e+01%, Percentage 6.61e+01%, Temperature 2.98e+02K DOI:10.13227/j.hjkx.201906226 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202608861990 Title:Release Mechanisms of Iron and Manganese from Sediments in Jinpen Reservoir Title of translation:金盆水库沉积物铁锰释放规律 Authors:Lu, Lin-Chao (1, 2); Huang, Ting-Lin (1, 2); Li, Nan (1, 2); Qi, Yun-Zhi (3); Zhang, Han (1, 2); Wang, Chen-Xu (1, 2); Si, Fan (1, 2) Author affiliation:(1) Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Xi'an Water Group Heihe Jinpen Reservoir Management Company, Xi'an; 710401, China Corresponding author:Huang, Ting-Lin(huangtinglin@xauat.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:7 Issue date:July 15, 2020 Publication year:2020 Pages:3231-3239 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In response to the annual hypolimnetic anoxia in stratified reservoirs, water-lifting aerators (WLAs) were used in Jinpen Reservoir to supplement the dissolved oxygen in the bottom water and suppress the release of reduced pollutants from sediment. However, due to the influence of geomorphic characteristics at the bottom of the reservoir, there were some differences in the efficiency of artificial mixing and aeration. After the deactivation of WLAs, the dissolved oxygen in the bottom water of some deeper areas was rapidly depleted, resulting in the re-release of pollutants. To explore the release mechanisms and diffusion intensity of iron and manganese during this period, the representative samples in the main reservoir area were collected to measure the distribution of dissolved iron and manganese in the pore water and overlying water and calculate the diffusive flux of dissolved iron and manganese across the sediment-water interface. The results showed that the bottom water of the lower terrain rapidly entered the anaerobic condition after the system was deactivated, resulting in the release of a large amount of dissolved manganese into the overlying water, the maximum concentration of which was 0.42 mg•L^-1. However, the bottom water of the higher terrain briefly entered a state of hypoxia, after which the dissolved oxygen concentration increased rapidly, so the dissolved manganese concentration increased moderately to 0.17 mg•L^-1. The distribution of iron and manganese in the pore-water-overlying water showed that the dissolved manganese was released more easily into the overlying water than the iron under anaerobic conditions and constant accumulation in the upper sediments and overlying water. However, the release of dissolved iron was not only suppressed by dissolved oxygen but also by other oxidants such as manganese oxide. The diffusion flux of dissolved manganese declined after the system was deactivated. A mass balance calculation demonstrated that the accumulation of dissolved manganese in the anaerobic layer was not only related to the diffusion flux but also to the sedimentation flux and the thickness of the anaerobic layer. Therefore, the biogeochemical cycle of iron and manganese in the anaerobic layer requires further study.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Dissolved oxygen Controlled terms:Anoxic sediments - Biochemical oxygen demand - Biogeochemistry - Diffusion - Dissolution - Iron - Manganese oxide - Reservoirs (water) - Water - Water aeration - Water pollution Uncontrolled terms:Dissolved oxygen concentrations - Manganese concentration - Mass-balance calculations - Maximum concentrations - Representative sample - Sediment water interface - Sedimentation fluxes - Stratified reservoirs Classification code:441.2 Reservoirs - 445.1 Water Treatment Techniques - 453 Water Pollution - 481.2 Geochemistry - 483 Soil Mechanics and Foundations - 545.1 Iron - 802.3 Chemical Operations - 804 Chemical Products Generally Numerical data indexing:Mass_Density 1.70e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 4.20e-04kg/m3 to 2.20e-02kg/m3 DOI:10.13227/j.hjkx.201910177 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658157 Title:Characteristics of Spatial and Temporal Evolution and Investigation of Air Pollution in Guangdong-Hong Kong-Macao Greater Bay Area Based on Ground-Space Observation Data Title of translation:基于地-空观测数据的粤港澳大湾区大气污染调查及时空演变特征 Authors:Wang, Yao-Ting (1); Liang, Jia-Cheng (1); Zheng, Zuo-Fang (1); Li, Qing-Chun (1); Li, Wei (2); Dou, You-Jun (1) Author affiliation:(1) Institute of Urban Meteorology, China Meteorological Administration, Beijing; 100089, China; (2) National Climate Center, Beijing; 100081, China Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2075-2086 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The temporal and spatial distribution characteristics, evolution trend and potential climatic effects of air pollution in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) were analyzed on different time scales and spatial spaces, based on ground environment observation data from June 2014 to December 2018 and satellite remote sensing inversion products from 2000 to 2018. The results show that: ① From the in-situ observed daily average concentration of PM2.5, good or mild to moderate pollution occurred in January, February, October, November, and December every year, and the rest of the time was excellent. ② Based on the annual average PM2.5 concentration obtained by satellite for the past 20 years, the spatial characteristics showed that the external radiation is centered on Guangzhou and Foshan. The time evolution shows the characteristics of an Ω shape, which increases gradually from 2000 to 2009, is highest in 2008, and then gradually decreases. ③ The monthly average aerosol optical thickness (AOT) value from the Multi-angle Imaging Spectro Radiometer satellite reversion every 10 years for a period (2000-2009 for a period, 2010-2018 for a period) was used to see the monthly variation. The monthly average AOT value in the first period was larger than that in the second period of the same month, the maximum value was in March and April, and the minimum value was in November and December. It is envisaged to draw a line along the north-south direction of the Pearl River Port, which basically shows that the AOT value in the west is greater than that in the east. ④ According to the observed daily average concentration data of O3-8h, the main concentration level of O3-8h in the GBA is excellent. The cities with good ozone concentration were most numerous in 2014, with five cities, and least in 2018, with only one city. The highest ozone concentration was in September, followed by June and November, and then May and July. In the past 20 years, the spatial distribution of the average concentration of O3 monitored by satellite remote sensing showed a characteristic Ω shape, increasing initially and then decreasing. The maximum value was in May, and the north-south boundary line appeared in space. ⑤ There is a good linear relationship between the interannual variation of monthly mean temperature and radiation, whereas the relationship between AOT and radiation cannot be described by a simple linear relationship.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Air pollution Controlled terms:Ozone - Remote sensing - River pollution - Satellites - Space optics - Spatial distribution Uncontrolled terms:Aerosol optical thickness - Average concentration - Different time scale - Interannual variation - Satellite remote sensing - Simple linear relationship - Spatial characteristics - Temporal and spatial distribution Classification code:451 Air Pollution - 453 Water Pollution - 655.2 Satellites - 656.1 Space Flight - 804 Chemical Products Generally - 921 Mathematics Numerical data indexing:Age 1.00e+01yr, Age 2.00e+01yr DOI:10.13227/j.hjkx.201906228 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202308796239 Title:Removal of Nitrate Nitrogen by Microbial Photoelectrochemical Cell: PANI/TiO2-NTs as a Photoanode Title of translation:微生物光电化学池去除硝酸盐氮:以PANI/TiO2-NTs为光阳极 Authors:Lu, Yi (1); Zhou, Hai-Shan (1); Peng, Rui-Jian (1); Ye, Jie-Xu (1, 2); Chen, Jian-Meng (1, 3); Song, Shuang (1, 2); Zhang, Shi-Han (1, 2) Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310014, China; (2) Zhejiang Key Laboratory of Industrial Pollution Microbial Control Technology, Hangzhou; 310014, China; (3) College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan; 316022, China Corresponding author:Ye, Jie-Xu(yejiexu@zjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:6 Issue date:June 15, 2020 Publication year:2020 Pages:2754-2761 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The use of microbial photoelectrochemical cells (MPECs) for the removal of contaminants is a cost-effective and environment-friendly method. Based on the preparation of polyaniline/titanium dioxide nanotube array (PANI/TiO2-NTs) composite photoelectrodes, an MPEC system comprising PANI/TiO2-NTs photoanode and biocathode was constructed and the removal performance of nitrate nitrogen (NO3^--N) was studied. The experimental results showed that the PANI/TiO2-NT electrode exhibited the best photoelectric performance when the PANI loading time was 80 s. Compared with the TiO2-NTs electrode, the photocurrent density doubled. The light-driven MPEC system could realize autotrophic denitrification without an external voltage. The biodegradation of NO3^--N conformed to the pseudo first-order kinetics. The higher the photoresponse current density, the better the denitrification performance of the system. When the initial concentration of NO3^--N was 25 mg•L^-1 and the photoresponse current density increased from 0.17 mA•cm^-2 to 0.67 mA•cm^-2, the average denitrification rate increased from 0.83 mg•(L•h)^-1 to 2.83 mg•(L•h)^-1. High-throughput sequencing of the biocathode microbial membranes revealed that Pseudomonas (27.37%) was the dominant bacteria. It was considered that the photogenerated electrons generated by the PANI/TiO2-NTs photoanode were transmitted to the cathode through an external circuit. Pseudomonas and other microorganisms with autotrophic denitrification and electrochemical activity directly used the electrons on the electrode as the sole electron donors for autotrophic denitrification reaction.
© 2020, Science Press. All right reserved. Number of references:34 Main heading:Electrochemical electrodes Controlled terms:Bacteria - Biodegradation - Cost effectiveness - Denitrification - Electrochemical cells - Nitrates - Nitrogen - Nitrogen removal - Oxide minerals - Photoelectrochemical cells - Polyaniline - Titanium dioxide Uncontrolled terms:Autotrophic denitrification - Electrochemical activities - High-throughput sequencing - Initial concentration - Photocurrent density - Photoelectric performance - Photogenerated electrons - Pseudo first-order kinetics Classification code:461.8 Biotechnology - 482.2 Minerals - 702.1 Electric Batteries - 708.2 Conducting Materials - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 911.2 Industrial Economics Numerical data indexing:Current_Density 6.70e+00A/m2 to 2.20e-01A/m2, Mass_Density 2.50e-02kg/m3 to 2.20e-02kg/m3, Percentage 2.74e+01% DOI:10.13227/j.hjkx.201911009 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278151 Title:Spatial Distribution and Risk Assessment of Heavy Metals in Sediments of the Ruxi Tributary of the Three Gorges Reservoir Title of translation:三峡库区支流汝溪河沉积物重金属空间分布及生态风险 Authors:Fang, Zhi-Qing (1, 2); Wang, Yong-Min (1); Wang, Xun (1); Xie, De-Ti (1); Wang, Ding-Yong (1) Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) College of Ecological Environmental Engineering, Guizhou Minzu University, Guiyang; 550025, China Corresponding author:Wang, Ding-Yong(dywang@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1338-1345 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Sediment column and soil samples collected from 12 sampling sites in four regions of the Ruxi River, a typical tributary of the Three Gorges Reservoir, were analyzed for eight selected heavy metals including Cr, Ni, Cu, Mn, Zn, Cd, Pb, and Hg to evaluate their spatial and vertical distribution, source, and biological toxic effects. The results showed that the average concentrations of heavy metals were (79.60±11.87), (41.340±4.999), (32.69±8.70), (823.34±125.76), (122.11±22.82), (0.393±0.140), and (29.122±6.811) mg•kg^-1 for Cr, Ni, Cu, Mn, Zn, Cd, and Pb, respectively, and (74.84±39.50) μg•kg^-1 for Hg, all of which exceeded the sediment background values of the Yangtze River. A spatial trend of decreasing metal concentrations was observed from the reach influenced by the human activities of Ruxi town to the backwater zone and then to the natural river reach. Moreover, in the backwater zone, the heavy metals in sediments and soil along the river were significantly lower than those in sediments, indicating that the sediments and soil were not one primary source for these metals in backwater zone sediment. From the vertical distribution of sediment, in addition to Pb, the highest level of metals was observed at 8 cm in the reach influenced by human activities, and their concentrations decreased with sediment depth in the backwater zone and natural river beach. Significant correlation was found between all the heavy metals (P<0.01, except Ni), indicating a potential homology of these metals in the Ruxi River. Evaluation results of the geoaccumulation index reveal that there exists light to partial moderate Cd and Zn pollution in the Ruxi River. The evaluation of biotoxicity effects showed that Ni was likely to have toxic effects on organisms with a probability of 10% to 75%, and Cd, Zn, Hg, Cu, Pb, and Cr are likely to have biotoxic effects at<10% probability. The combined effect values of multiple metals indicated that the risk of adverse effects was between low and lower medium in the sediments of the Ruxi River.
© 2020, Science Press. All right reserved. Number of references:32 Main heading:River pollution Controlled terms:Heavy metals - Industrial poisons - Risk assessment - Rivers - Sediments - Soil surveys - Soils - Spatial distribution - Water Uncontrolled terms:Average concentration - Biotoxicity effects - Evaluation results - Geo-accumulation index - Metal concentrations - Three gorges reservoir - Toxic effect - Vertical distributions Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Percentage 1.00e+01% to 7.50e+01%, Size 8.00e-02m DOI:10.13227/j.hjkx.201909208 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278063 Title:Effect of Organic Fertilizer and Inorganic Fertilizer Application on N2O Emissions from Fluvo-aquic Soil in the North China Plain Title of translation:有机肥与无机肥配施对潮土N2O排放的影响 Authors:Sun, He-Yang (1, 2); Z.-M., Wan; D.-Y., Liu; X., Liao; W.-X., Ding Author affiliation:(1) College of Earth Sciences, Jilin University, Changchun; 130061, China; (2) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China Corresponding author:Wan, Zhong-Mei(wanzm@jlu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1474-1481 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The North China Plain is an important grain production area in China. Due to the low content of soil organic carbon, increasing the application rate of nitrogen fertilizer would not lead to a continuous increase of maize yield at present. The combined application of organic fertilizer and inorganic fertilizer is widely regarded as a measure to simultaneously increase grain yield and soil organic carbon; however, the effect of organic fertilizer and inorganic fertilizer application on N2O emissions from farmland in the North China Plain is unclear. Here, N2O emissions and crop yields in cropland under the combined application of different types and rates of organic fertilizers plus inorganic N fertilizer were measured in the North China Plain. The field experiment included eight treatments: no N fertilizer (CK), inorganic fertilizer (NPK), 40% cow manure N plus 60% inorganic fertilizer N (CM), 40% chicken manure N plus 60% inorganic fertilizer N (FC), 40% pig manure N plus 60% inorganic fertilizer N (FP), 20% cow manure N plus 80% inorganic fertilizer N (1/2CM), 20% chicken manure N plus 80% inorganic fertilizer N (1/2FC), and 20% pig manure N plus 80% inorganic fertilizer N (1/2FP). The N2O fluxes were significantly correlated with soil water-filled pore space during the maize season (P<0.05). There was a significant linear relationship between N2O fluxes and soil dissolved organic carbon content during the maize season in all treatments except the NPK treatment. In the maize season, N2O emission was 0.50 kg•hm^-2 under CK treatment, and increased to 2.28 kg•hm^-2 under NPK treatment. However, when the proportion of manure N to total N applied was reduced from 40% to 20%, N2O emissions were significantly reduced by 33.6%, 43.7%, and 12.1% under 1/2CM, 1/2FC, and 1/2FP treatments, respectively. The difference in application rate of organic manure N did not significantly affect maize yield. The reduction of N2O emission at the low manure application rate compared with the high manure application rate was likely due to the decrease in dissolved organic carbon in soils.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Nitrogen fertilizers Controlled terms:Crops - Mammals - Manures - Organic carbon - Soil moisture - Stream flow Uncontrolled terms:Crop yield - Dissolved organic carbon - Fluvo-aquic soils - Inorganic fertilizers - Inorganic N fertilizer - Linear relationships - North China Plain - Organic fertilizers Classification code:407.2 Waterways - 483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 804.1 Organic Compounds - 821.4 Agricultural Products - 821.5 Agricultural Wastes Numerical data indexing:Percentage 1.21e+01%, Percentage 2.00e+01%, Percentage 3.36e+01%, Percentage 4.00e+01% to 2.00e+01%, Percentage 4.00e+01%, Percentage 4.37e+01%, Percentage 6.00e+01%, Percentage 8.00e+01% DOI:10.13227/j.hjkx.201908008 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371238 Title:Red Mud-activated Peroxymonosulfate for Ciprofloxacin Degradation: Efficiency and Mechanism Title of translation:赤泥活化过一硫酸盐降解环丙沙星:性能和机制 Authors:Shi, Jing-Zhuan (1); Wei, Hong (1); Zhou, Xiao-De (1); Li, Ke-Bin (2); Shi, Ying-Juan (3) Author affiliation:(1) State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi'an University of Technology, Xi'an; 710048, China; (2) Key Laboratory of Synthetic and Natural Functional Molecule Chemistry, Ministry of Education, Northwest University, Xi'an; 710069, China; (3) Shaanxi Reconnaissance Design & Research Institute of Water Environmental Engineering, Xi'an; 710021, China Corresponding author:Wei, Hong(weihong0921@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1743-1751 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this paper, the effects and mechanism of ciprofloxacin (CIP) degradation with peroxymonosulfate (PMS) catalyzed by solid waste red mud (RM) was firstly studied. The results indicated that RM has large specific surface area (10.96 m²•g^-1) and complex pore structure, containing ferric, alumina and calcium oxide, which enhanced ciprofloxacin degradation by PMS effectively. Radical quenching experiments revealed that SO4^-• and HO• were contributed to ciprofloxacin oxidation, and the reaction was mainly occurred on RM's surface. An increase in temperature could accelerate CIP degradation, and the corresponding reaction activation energy Ea was about 5.74 kJ•mol^-1. Meanwhile, CIP degradation rate increased with PMS concentration and the optimal dosage of RM was 1.0 g•L^-1. Eight degradation intermediates were identified using HPLC/MS/MS, and consequently, CIP was degraded mainly through two pathways; the piperazine groups were preferentially attacked by active free radicals. This study further indicated that RM is a cheap catalyst and can be potentially used in the treatment of antibiotic contaminated wastewater.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Antibiotics Controlled terms:Activation energy - Alumina - Aluminum oxide - Calcium oxide - Degradation - Free radicals - Lime - Pore structure - Wastewater treatment Uncontrolled terms:Ciprofloxacin - Degradation pathways - Hydroxyl radicals - Peroxymonosulfate - Red mud Classification code:452.4 Industrial Wastes Treatment and Disposal - 461.6 Medicine and Pharmacology - 802.2 Chemical Reactions - 804.2 Inorganic Compounds - 931.2 Physical Properties of Gases, Liquids and Solids Numerical data indexing:Mass_Density 1.00e+00kg/m3 to 2.20e-02kg/m3, Specific_Surface_Area 1.10e+04m2/kg DOI:10.13227/j.hjkx.201911239 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371206 Title:Consumption Capacity of N2O in Paddy Soil and the Response Mechanism of nosZ-I-containing Communities Title of translation:稻田土壤N2O消纳能力及nosZ-I型功能种群应答机制 Authors:Guo, Jun-Li (1, 2); Tian, Mei-Jie (3); Ge, Ti-Da (1); Wei, Wen-Xue (1); Wang, Guang-Jun (2); Sun, Zhi-Long (4); Liu, Yi (1) Author affiliation:(1) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) College of Life Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China; (3) College of Agronomy, Hunan Agricultural University, Changsha; 410128, China; (4) Agricultural Comprehensive Service Center of Hunan Province Ningxiang Huilongpu Town, Ningxiang; 410606, China Corresponding author:Liu, Yi(liuyi@isa.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1968-1975 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The long-term flooding anaerobic environment in paddy soils is conducive to denitrification, which is one of the most important reasons for N2O emissions. N2O can be transformed to nitrogen gas (N2) by bacteria and archaea containing nitrous oxide reductase (N2OR) encoded by the nosZ gene, which is the only known biological pathway of N2O consumption in soil. nosZ-I is known to be typical in denitrifying bacteria, which is one of the clades of the nosZ gene and is mainly possessed a Tat signal peptide motif. Although many researchers have studied N2O emission characteristics of paddy soil, the capacity of N2O consumption and the response mechanism of related functional microorganisms in paddy fields is not yet clear. To verify the effect of exogenous N2O on N2O consumption and nosZ-I gene, a pot trial experiment was performed under anaerobic conditions. We collected intact soil cores from flooding paddy fields at a 0-5 cm depth, and exogenous N2O gas was input through the bottom of flooding paddy soil cores. Meanwhile, a control treatment (CK) with no additional N2O gas was also performed. The dynamic characteristics of the added exogenous N2O concentration through the intact soil cores, the content of inorganic nitrogen, and DOC were systematically monitored. In addition, the change in the nosZ-I population diversity and community composition were investigated by high-throughput sequencing approaches, with the purpose of revealing the N2O uptake ability of flooded paddy soil and the response mechanism of the nosZ-I population. The results showed that 97.39% of exogenous N2O diffused into the soil cores, and only 0.72%-7.75% of exogenous N2O escaped from the soil surface. The N2O released in the headspace of soil cores could continue being absorbed and consumed by the flooding soil column. In addition, 67.10% of the N2O escaped to the headspace was consumed in exogenous N2O treatment after 192 h of incubation, which was higher than that in CK treatment, and the N2O consumption rate increased by 144.2% than that in CK treatment. Meanwhile, the consumption of NH4⁺-N, NO3^--N, and DOC consumed during exogenous N2O addition treatment was 19.65%, 16.29%, and 8.41% higher than that in CK treatment, respectively. However, the diversity of the nosZ-I gene community had no significant difference; the community composition of nosZ-I-containing bacteria changed significantly after 192 h when exogenous N2O was input. The abundances of OTU5004, OTU5065, OTU960, and OTU1282 (Proteobacteria) significantly increased, which were the dominant bacterial strain of nosZ-I gene on the OTU level. Compared with the initial sample and CK, the abundance of the OTU5004 strain increased by 7.3% and 4.63%, and the abundance of the OTU5265 strain (Azoarcus sp.) increased by 0.33% and 0.15%, respectively. The result indicated that the flooding paddy soil column at the soil layer of 0-5 cm has a strong N2O absorption and consumption ability. In summary, compared with CK, the addition of exogenous N2O significantly accelerated the N2O consumption rate, improved the consumption potential of flooding paddy soil column, promoted carbon and nitrogen conversion, and changed nosZ-I community composition. These results would provide a new reference for reducing atmospheric N2O emissions.
© 2020, Science Press. All right reserved. Number of references:42 Main heading:Soil pollution Controlled terms:Bacteria - Denitrification - Floods - Genes - Nitrogen - Nitrogen oxides - Soils Uncontrolled terms:Anaerobic conditions - Community composition - Dynamic characteristics - Emission characteristics - Exogenous N2O - High-throughput sequencing - N2O consumption - Paddy soils Classification code:461.2 Biological Materials and Tissue Engineering - 483.1 Soils and Soil Mechanics - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Percentage 1.44e+02%, Percentage 1.50e-01%, Percentage 1.63e+01%, Percentage 1.96e+01%, Percentage 3.30e-01%, Percentage 4.63e+00%, Percentage 6.71e+01%, Percentage 7.20e-01% to 7.75e+00%, Percentage 7.30e+00%, Percentage 8.41e+00%, Percentage 9.74e+01%, Size 0.00e+00m to 5.00e-02m, Time 6.91e+05s DOI:10.13227/j.hjkx.201908220 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990438 Title:Fine Particulate Emission Characteristics of an Ultra-Low Emission Coal-Fired Power Plant Title of translation:超低排放改造后燃煤电厂细颗粒物排放特征 Authors:Wang, Run-Fang (1); Ma, Da-Wei (2); Jiang, Shao-Yi (1); Zhu, Ren-Bin (1); He, Jun (2); Zhang, Ben-Yao (2) Author affiliation:(1) Anhui Province Key Laboratory of Polar Environment and Global Change, University of Science and Technology of China, Hefei; 230026, China; (2) State Grid Anhui Electric Power Corporation 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:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:98-105 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Since the introduction of ultra-low emissions, the characteristics of particulate matter (PM) emissions from coal-fired power plants have changed. We quantitatively evaluate the emission characteristics of each component in PM and the impact of purification equipment by analyzing three ultra-low emission units of coal-fired power plants (FP1, FP2, and FP3). A DGI was used to sample particles from the wet flue gas desulfurization (WFGD) unit and wet electrostatic precipitator (WESP) inlet and outlet, which were then analyzed by various methods. The results showed that the mass concentrations of PM1, PM2.5, and PM10 discharged from the outlets of the three units were 0.25-0.38, 0.31-0.42, and 0.42-0.57 mg•m^-3, respectively, and that the mass concentration of PM10 discharged under the two kinds of units was equivalent. However, there were differences in the particle size distribution and composition of the particles. In comparison to the FP1 and FP2 units, the PM2.5/PM10 ratio of the FP3 unit was the highest. A possible reason for this is that the unit was equipped with a WESP, which can better remove particle sizes of 2.5 μm or more. The total concentrations of water-soluble ions in PM2.5 discharged from the FP2 and FP3 units were 0.20 and 0.06 mg•m^-3, respectively. The water-soluble ions emitted from the FP2 unit were mainly Ca²⁺ and SO4^2-, whereas those mainly emitted from the FP3 unit were NH4⁺ and SO4^2-. Analysis of the PM from the WFGD import and export of the FP2 unit showed that the WFGD process increased the water-soluble ion discharge by entraining the desulfurization slurry containing limestone and gypsum. Addition of a WESP after WFGD can effectively remove PM2.5 and PM10 particles and reduce the influence of water-soluble ions on the atmospheric environment.
© 2020, Science Press. All right reserved. Number of references:35 Main heading:Fossil fuel power plants Controlled terms:Coal - Coal fueled furnaces - Desulfurization - Electrostatic precipitators - Ions - Lime - Mining - Particle size - Particle size analysis - Particles (particulate matter) - Particulate emissions Uncontrolled terms:Atmospheric environment - Coal-fired power plant - Emission characteristics - Particulate matter emissions - Purification equipments - Water-soluble ions - Wet electrostatic precipitators - Wet flue gas desulfurization Classification code:451.1 Air Pollution Sources - 502.1 Mine and Quarry Operations - 524 Solid Fuels - 704.2 Electric Equipment - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Size 2.50e-06m DOI:10.13227/j.hjkx.201904162 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203509105243 Title:Different Responses of Soil Microbial Community Structure to Irrigation with Treated Wastewater from Domestic and Industrial Sources Title of translation:土壤微生物群落结构对生活源和工业源再生水灌溉的差异化响应 Authors:Wang, Yan (1, 2); Cheng, Dong-Hui (1, 3); Tan, Wen-Bing (2, 4); Yu, Hong (2, 4); Xi, Bei-Dou (2, 4); Jiang, Yong-Hai (2, 4); Dang, Qiu-Ling (2, 4) Author affiliation:(1) School of Water and Environment, Chang'an University, Xi'an; 710054, China; (2) State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an; 710054, China; (4) State Environment Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Science, Beijing; 100012, China Corresponding author:Dang, Qiu-Ling(dangling819@126.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:9 Issue date:September 15, 2020 Publication year:2020 Pages:4253-4261 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the long-term effects of irrigation with treated domestic and industrial wastewater on the microbial community structure of the soil, Illumina MiSeq high-throughput sequencing technology was applied. Groundwater irrigated soil was used as a control. The effects of soil environmental factors and their interactions on the microbial community structure were investigated. Compared with the groundwater irrigation, irrigation with treated domestic wastewater can significantly increase the contents of TOC, DOC, Eh, NH4⁺-N, and TP, whereas irrigation with treated industrial wastewater can increase the contents of Cd, Cr, Cu, Pb, and Zn in the soil. Irrigation with treated wastewater also increases the relative abundance of Acidobacteria and Planctomycetes, and reduces the relative abundance of Firmicutes and Tectomicrobia. The effects of treated wastewater from different sources on functional microorganisms in soil are also different; irrigation with treated domestic wastewater can increase the relative abundance of Chloroflexi and Nitrospirae, whereas irrigation with treated industrial wastewater has negative effects on the abundance of Actinobacteria. The results of db-RDA analysis show that TN, TP, DOC, and Eh are the main factors that impact the microbial communities in soils irrigated with treated domestic wastewater (P<0.05), and heavy metals are the main factors that impact the microbial communities in soils irrigated with treated industrial wastewater (P<0.05). Compared with groundwater irrigation, treated wastewater irrigation can change the correlations between soil environmental factors, which in turn affect the microbial community structure. The growth of microorganisms in soils irrigated with treated domestic wastewater is mainly controlled by the increase in the nutrients such as DOC, TN, and TP and changes in soil redox conditions. The abundance of microorganisms in soil irrigated with treated industrial wastewater is significantly correlated with the accumulation of heavy metals.
© 2020, Science Press. All right reserved. Number of references:48 Main heading:Lead removal (water treatment) Controlled terms:Bacteriology - Groundwater - Heavy metals - Irrigation - Microorganisms - Soil moisture - Wastewater treatment - Water treatment Uncontrolled terms:Domestic wastewater - Environmental factors - Groundwater irrigation - High-throughput sequencing - Industrial wastewaters - Microbial communities - Microbial community structures - Soil microbial community structure Classification code:444.2 Groundwater - 445.1 Water Treatment Techniques - 452.4 Industrial Wastes Treatment and Disposal - 461.9 Biology - 483.1 Soils and Soil Mechanics - 531 Metallurgy and Metallography - 821.3 Agricultural Methods DOI:10.13227/j.hjkx.202002154 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990497 Title:Spatial Characteristics, Risk Assessment, and Source Analysis of Elements in Surface Sediments from the Baiyangdian Lake Title of translation:白洋淀表层沉积物元素的空间特征, 风险评价及来源分析 Authors:Wang, Jing-Zhong (1, 2, 3); Liu, Zhuo (1); Wei, Hao (1); Wu, Yu-Hui (1); Zhan, Shui-E (2); Zhu, Chi (4); Zhang, Yi-Miao (1) Author affiliation:(1) Experiment and Practice Teaching Center, Heibei GEO University, Shijiazhuang; 050031, China; (2) State Key Laboratory of Lake and Environmental Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (3) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China; (4) Jiangsu Provincial Key Laboratory of Environmental Engineering, Jiangsu Provincial Academy of Environmental Science, Nanjing; 210036, China Corresponding author:Zhan, Shui-E(zhanshuie@126.comemail499942133@qq.com)Zhu, Chi(499942133@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:224-231 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this paper, nutrient elements (N and P), heavy metals (Pb, Cu, Zn, Cd, Cr, Co, Ni, and Sn), and grain size in surface sediments of Baiyangdian Lake, northern China, are studied. We also analyze the spatial variation in elemental characteristics and undertaken a pollution risk assessment. By combining data with information on the river sediment characteristics, we use multivariate statistical methods to reveal the sources and variation of elements in sediments. The results showed that the average contents of heavy metals in surface sediments from the lake and associated rivers were higher than background values. Within the area of the lake, nutrient elements are relatively high in the northwest region but low in the southeast region, and heavy metals are relatively high in the middle of the lake but low in the southern and northern areas. The sequence of comprehensive pollution index (I) in sediments was Cd>Pb>Cr>Cu=Zn>Ni>Sn>Co, with Cd being assessed as severe pollution and other elements as moderate pollution, although severe pollution of Cr was found in the Zaolinzhuang area. The order of potential ecological risk coefficients (Erⁱ) was determined as Cd>Pb>Cu>Cr>Ni>Zn, whereby Cd was associated with a strong potential ecological risk (except in the Caiputai area) and other elements were associated with a slight potential ecological risk. Differences in the lake sediment texture were found to be slight. Non-point source pollution after rivers flow into the lake was determined as the main reason for the spatial variation of elements in the surface sediments of Baiyangdian Lake, although point source pollution in the villages surrounding the lake should not be ignored, especially with respect to N, P, Pb, and Cr.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:River pollution Controlled terms:Heavy metals - Lake pollution - Lakes - Multivariant analysis - Nutrients - Risk assessment - Rivers - Surficial sediments - Textures Uncontrolled terms:Multivariate statistical method - Non-point source pollution - Northwest regions - Point source pollution - Potential ecological risk - Spatial characteristics - Spatial variations - Surface sediments Classification code:453 Water Pollution - 483 Soil Mechanics and Foundations - 531 Metallurgy and Metallography - 914.1 Accidents and Accident Prevention - 922 Statistical Methods DOI:10.13227/j.hjkx.201907005 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20202008658098 Title:Start-up of an Integrated Process of Denitrifying Phosphorus Removal Coupled with Partial Nitritation and Anaerobic Ammonium Oxidation Title of translation:反硝化除磷耦合部分亚硝化-厌氧氨氧化一体式工艺的启动 Authors:Chen, Ya (1); Yin, Wen (1); Zhang, Xing-Xing (1); Zhang, Yu (1); Song, Yin-Ling (1, 2, 3); Wu, Peng (1, 2, 3); Xu, Le-Zhong (1, 2, 3) Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) National Regional Engineering Laboratory of Urban Domestic Wastewater Resources Utilization Technology, Suzhou; 215009, China; (3) Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou; 215009, China Corresponding author:Song, Yin-Ling(807118983@qq.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:5 Issue date:May 15, 2020 Publication year:2020 Pages:2367-2372 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:An integrated process uses an anaerobic baffled reactor combined with a fully mixed reactor (ABR-CSTR) as a test carrier for low-carbon, high-ammonia nitrogen (NH4⁺-N≥200 mg•L^-1) wastewater under continuous flow operating conditions; the normal anaerobic sludge in different compartments is subjected to domestication and cultivation to realize denitrifying phosphorus removal, partial nitritation, and anaerobic ammonium oxidation, thereby achieving the coupling effect of the three. Partial nitritation was successfully achieved in the A4 (CSTR) section by the strategy of limited oxygen (dissolved oxygen DO=0.8 mg•L^-1) and intermittent aeration (exposure ratio=30 min:30 min) after 30 days. Subsequently, a strategy of shortening the hydraulic retention time (HRT) was adopted to achieve a stable operation of partial nitritation, and a stable influent substrate of NO2^--N/NH4⁺-N 1.0-1.1 was provided for anaerobic ammonium oxidation. The anaerobic ammonium oxidation function was achieved after 154 days in the A5 and A6 compartments. The removal rates of NH4⁺-N and NO2^--N were 94% and 97%, respectively, and the NO3^--N concentration in the effluent was stable at 22 mg•L^-1. The denitrifying phosphorus removal function was successfully achieved in the A1-A3 compartments by using NOx^--N in the reflux as an electron acceptor. The removal rate of PO4^3--P was 77%. The integrated process was successfully coupled through 175 days, achieving simultaneous removal of C, N, and P.
© 2020, Science Press. All right reserved. Number of references:25 Main heading:Nitrogen removal Controlled terms:Ammonia - Denitrification - Dissolved oxygen - Effluents - Nitrogen oxides - Oxidation - Phosphorus - Wastewater treatment Uncontrolled terms:Anaerobic ammonium oxidation - Anaerobic baffled reactor - Denitrifying phosphorus removal - Hydraulic retention time - Intermittent aeration - Operating condition - Partial nitritation - Simultaneous removal Classification code:452.3 Industrial Wastes - 452.4 Industrial Wastes Treatment and Disposal - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds Numerical data indexing:Age 4.22e-01yr, Age 4.79e-01yr, Age 8.22e-02yr, Mass_Density 2.20e-02kg/m3, Percentage 7.70e+01%, Percentage 9.40e+01%, Percentage 9.70e+01%, Time 1.80e+03s DOI:10.13227/j.hjkx.201907188 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278089 Title:Passivation and Remediation Effects and Mechanisms of Plant Residual Modified Materials on Lead-Contaminated Soils Title of translation:桉树遗态磷灰石材料对铅污染土壤的钝化修复效应 Authors:Fang, Ya-Li (1, 2, 3); Zhu, Zong-Qiang (1, 2, 3); Zhao, Ning-Ning (1, 2, 3); Zhu, Yi-Nian (1, 2, 3); Li, Chao (4); Zhang, Li-Hao (1, 2, 3) Author affiliation:(1) Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin; 541004, China; (2) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin; 541004, China; (3) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin; 541004, China; (4) Chongqing Tongnan District Hydrological Management Station, Chongqing; 402660, China Corresponding author:Zhu, Zong-Qiang(zhuzongqiang@glut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1498-1504 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The specific characteristics and mechanism of passivation of Pb in soil were studied using HAP/C composite (PBGC-HAP/C) as passivation, and using proportion of PBGC-HAP/C, particle size and type of passivator, soil moisture content, soil pH value of Pb, and particle size of the material as influencing factors. The results showed that with an increase in dosage of the passivator and passivation time, the passivation effect increases gradually. Reducing the particle size of the passivator is beneficial to improving the passivation effect. pH has a greater impact on passivation, with the passivation effect obviously rising with increased pH, and the passivation rate in an alkaline environment can reach above 99%. An increase in water content is beneficial to the improvement of the passivation effect, but the contribution is not significant. Through comparative analysis of the XPS, XRD, and FT-IR of materials before and after passivation, the results indicated that the passivation of PBGC-HAP/C to Pb is mainly through direct and indirect effects. Direct effects include physical adsorption, chemical complexation, electrostatic interaction, ion exchange, and precipitation; the indirect effect is mainly enhanced by increasing the pH value of the organic matter.
© 2020, Science Press. All right reserved. Number of references:26 Main heading:Passivation Controlled terms:Alkalinity - Hydroxyapatite - Ion exchange - Lead - Lead metallography - Particle size - Particle size analysis - pH effects - Precipitation (chemical) - Remediation - Soil moisture - Soil pollution - Soils Uncontrolled terms:Alkaline environment - Characteristics and mechanisms - Comparative analysis - Eucalyptus - Increase in water content - Lead-contaminated soil - Passivation effect - Physical adsorption Classification code:454.2 Environmental Impact and Protection - 483.1 Soils and Soil Mechanics - 539.2.1 Protection Methods - 546.1 Lead and Alloys - 801.1 Chemistry, General - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 951 Materials Science Numerical data indexing:Percentage 9.90e+01% DOI:10.13227/j.hjkx.201909122 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20203108990481 Title:Seasonal Characteristics and Source Analysis of Water-Soluble Ions in PM2.5 of Anyang City Title of translation:安阳市大气 PM2.5中水溶性离子季节特征及来源解析 Authors:Sun, You-Chang (1, 2); Jiang, Nan (1, 2); Wang, Shen-Bo (1, 2); Duan, Shi-Guang (1, 2); Zhang, Rui-Qin (1, 2) Author affiliation:(1) College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou; 450001, China; (2) Research Institute of Environmental Science, Zhengzhou University, Zhengzhou; 450001, China Corresponding author:Jiang, Nan(jiangn@zzu.edu.cnemailrqzhang@zzu.edu.cn)Zhang, Rui-Qin(rqzhang@zzu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:1 Issue date:January 15, 2020 Publication year:2020 Pages:75-81 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:We explore the characteristics and sources of water-soluble ions in aerosol fine particulate matter (PM2.5) samples collected from Anyang, China, during typical seasonal months from 2018 to 2019. Nine water-soluble ions (Na⁺, NH4⁺, K⁺, Mg²⁺, Ca²⁺, F^-, Cl^-, NO3^-, and SO4^2-) were analyzed. The analysis of PM2.5, water-soluble ion concentration levels, anion-cation balance, nitrogen oxidation rate (NOR), sulfur oxidation rate (SOR), and ion correlation showed that the annual average concentrations of PM2.5 and water-soluble ions in Anyang were (85.81±45.43) μg•m^-3 and (48.21±30.04) μg•m^-3, respectively. Concentrations of ions were ranked as: NO3^->SO4^2->NH4⁺>Cl^->K⁺>Ca²⁺>Na⁺>Mg²⁺>F^-. The annual average concentration of the sum of NH4⁺, NO3^-, and SO4^2- was (42.72±27.87) μg•m^-3, which accounted for 87.14% of total water-soluble ions. Moreover, NH4⁺ was highly related to SO4^2- and NO3^-. The mean values of the nitrogen oxidation rate (NOR) and sulfur oxidation rate (SOR) were 0.25 and 0.37, respectively. These results suggest that these ions were the result of secondary formation. The anion-cation charge equivalent value was 0.75-0.94, which indicates that the sampled aerosols were alkaline. NH4⁺ mainly existed in the form of (NH4)2SO4 and NH4NO3 in spring, summer, and autumn, whereas in winter it mainly existed in the form of NH4Cl. The results of principal component analysis indicated that secondary aerosols, coal combustion, biomass burning, and dust were the main sources of the water-soluble ions in Anyang during the sampled periods.
© 2020, Science Press. All right reserved. Number of references:36 Main heading:Coal combustion Controlled terms:Aerosols - Coal dust - Nitrogen - Nitrogen compounds - Oxidation - Positive ions - Sulfur Uncontrolled terms:Annual average concentration - Fine particulate matter (PM2.5) - Ion correlations - Seasonal characteristics - Secondary aerosols - Source analysis - Sulfur oxidation - Water-soluble ions Classification code:503 Mines and Mining, Coal - 521 Fuel Combustion and Flame Research - 524 Solid Fuels - 802.2 Chemical Reactions - 804 Chemical Products Generally Numerical data indexing:Percentage 8.71e+01% DOI:10.13227/j.hjkx.201907256 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278053 Title:Characteristics of Nitrogen and Phosphorus Output and Loss Flux in the Shipanqiu Watershed, Three Gorges Reservoir Area Title of translation:三峡库区石盘丘小流域氮磷输出形态及流失通量 Authors:Chen, Shi-Qi (1); Long, Yi (2); Yan, Dong-Chun (2); Gao, Ming (1); Li, Jia-Chen (1); Xu, Guo-Xin (1); Huang, Rong (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:Gao, Ming(gaoming@swu.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1276-1285 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:As the source of non-point pollution in the Three Gorges Reservoir Area, small watershed is a key control object in alleviating deterioration of water quality. In the Three Gorges Reservoir Area, the Shipanqiu small watershed with various land-use types was selected as the research object, and the water quantity and quality of the outlet section of the watershed were continuously monitored. We carried out analysis of the small watershed runoff loss and nitrogen and phosphorus pollutants with concentration, analyzed the morphology change characteristics of runoff erosion, calculated the small watershed of pollutant emission flux, and analyzed the nitrogen and phosphorus nutrient loss and main human and natural factors, especially in the Three Gorges Reservoir Area of agriculture where nonpoint source pollution research has important practical significance. The results showed that the rainfall in the watershed varied significantly with the seasons, and the rainfall was mainly distributed from April to June, which was the main output period of nitrogen and phosphorus loss in the small watershed, accounting for 58.94% and 67.60% of the total nitrogen and phosphorus load, respectively, in the whole year. The total annual runoff in the Shipanqiu small watershed was 8.02×10⁴ m³, and the annual total nitrogen loss flux was 5.04 kg•hm^-2, of which nitrate nitrogen (2.54 kg•hm^-2) was the main part. The total phosphorus output was 0.534 kg•hm^-2, and the soluble total phosphorus (0.422kg•hm^-2) accounted for 79.00% of the total phosphorus flux. The loss flux of total nitrogen was 9.51 times that of total phosphorus, and the non-point source pollution risk of nitrogen was much greater than that of phosphorus. Therefore, for the Shipanqiu small watershed, it is especially important to prevent nitrogen loss in paddy fields when fertilization and rainfall coincide.
© 2020, Science Press. All right reserved. Number of references:45 Main heading:Water pollution Controlled terms:Agricultural robots - Agricultural runoff - Deterioration - Land use - Nitrogen - Phosphorus - Quality control - Rain - Reservoirs (water) - Ships - Water pollution control - Water quality - Watersheds Uncontrolled terms:Morphology changes - Nitrogen and phosphorus - Nitrogen and phosphorus loss - Nitrogen phosphorus - Non-point source pollution - Nonpoint pollutions - Soluble total phosphorus - Three gorges reservoir area Classification code:403 Urban and Regional Planning and Development - 441.2 Reservoirs - 443.3 Precipitation - 444.1 Surface Water - 445.2 Water Analysis - 453 Water Pollution - 804 Chemical Products Generally - 913.3 Quality Assurance and Control - 951 Materials Science Numerical data indexing:Percentage 5.89e+01%, Percentage 6.76e+01%, Percentage 7.90e+01% DOI:10.13227/j.hjkx.201909082 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20204009256316 Title:Response of Bacterial and Fungal Communities to Chemical Fertilizer Reduction Combined with Organic Fertilizer and Straw in Fluvo-aquic Soil Title of translation:潮土细菌及真菌群落对化肥减量配施有机肥和秸秆的响应 Authors:Wu, Xian (1); Wang, Rui (1); Hu, He (1); Xiu, Wei-Ming (1); Li, Gang (1); Zhao, Jian-Ning (1); Yang, Dian-Lin (1); Wang, Li-Li (1); Wang, Xin-Yi (1) Author affiliation:(1) Key Laboratory of Original Agro-environment Pollution Prevention and Control of Ministry of Agriculture and Rural Affairs, Tianjin Key Laboratory of Agro-environment and Agro-product Safety, Agro-environmental Protection Institute of Ministry of Agriculture and Rural Affairs, Tianjin; 300191, China Corresponding author:Xiu, Wei-Ming(xiuweiming@caas.cnemailligang06@caas.cn)Li, Gang(ligang06@caas.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:10 Issue date:October 15, 2020 Publication year:2020 Pages:4669-4681 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:To investigate the effects of chemical fertilizer reduction combined with organic fertilizer and straw on bacterial and fungal communities in fluvo-aquic soil under a wheat-maize rotation system in North China, a field-oriented fertilization experiment was performed at a trial base in Ninghe District of Tianjin. The differences in composition, diversity, and structure of bacterial and fungal communities were evaluated using five fertilization patterns (chemical fertilizer, F; chemical fertilizer reduction, FR; chemical fertilizer reduction combined with straw, FRS; chemical fertilizer reduction combined with organic fertilizer, FRO; chemical fertilizer reduction combined with organic fertilizer and straw, FROS) using Illumina high-throughput sequencing technology. Further, the main soil environmental factors driving the alteration of bacterial and fungal communities under different fertilization treatments were explored in combination with soil chemical analysis. The results showed that adding organic fertilizer (FRO) significantly increased the SOM content. In comparison with the FRS treatment, the TP content in the FROS treatment significantly increased by 13.33%. The AP content increased significantly after applying the FRO and FROS treatment, and it increased by 18.03%-33.45% and 22.69%-38.72%, respectively, as compared to that with the other treatments. The NH4⁺-N content of FRO and FROS treatments was significantly higher than that of chemical fertilizer treatments (F and FR), which was 2.14 and 2.23 times that of F treatment, and 2.23 and 2.33 times that of FR treatment, respectively. Proteobacteria, Actinobacteria, Chloroflexi, and Acidobacteria were the dominant bacterial phyla for all treatments, with Ascomycota being the dominant fungal phylum. Based on the chemical fertilizer reduction combined with organic fertilizer, the addition of straw (FROS) significantly decreased the relative abundance of Actinobacteria. Under the FRS and FROS treatments, a significant decrease in the relative abundance of Gemmatimonadetes was observed. Moreover, the FROS treatment caused a significant decrease in the relative abundance of Planctomycetes and Verrucomicrobia. As for the fungal community, the relative abundance of Ascomycota was significantly increased under the treatments applying organic fertilizer (FRO and FROS). In comparison with the FR treatment, the FROS treatment significantly decreased the relative abundance of Mortierellomycota and Olpidiomycota, and the FRS treatment also showed a significant inhibitory effect on the relative abundance of Mortierellomycota. The Shannon index of bacterial community of the FROS treatment was significantly reduced by 1.26% and 1.25% in comparison with the F and FR treatments, respectively; the Chao1 index increased by 4.51% as compared with that of the F treatment. The Shannon index of bacterial community exhibited a significantly positive correlation with available phosphorus as well as ammonium content (P<0.05). In comparison to the FR treatment, the FRS, FRO, and FROS treatments significantly decreased the Shannon index of fungal community by 29.85%, 24.94%, and 25.73%, respectively. A significantly positive relationship between the Shannon index of fungal community and available phosphorus content was observed. The community structure of bacteria of the FROS treatment was significantly different from that of F, FR, and FRO treatments, with the soil moisture, total phosphorus, pH, and available phosphorus as the major driving factors; the fungal community structure of the FRO and FROS treatments showed significant difference from that of the F and FR treatments, and the fungal community structure was mainly altered by total nitrogen, available phosphorus, and total phosphorus. In summary, our results indicated that the bacterial and fungal communities in fluvo-aquic soil exhibited a relatively strong response to the chemical fertilizer reduction combined with organic fertilizer and straw; meanwhile, the fungal community was also significantly influenced by chemical fertilizer reduction with organic fertilizer. Therefore, the organic fertilizer and straw drive the changes in the bacterial and fungal community composition, while improving the soil physicochemical properties. The fluvo-aquic fungi were more sensitive to the organic materials than the bacteria. Soil P was a common important influencing factor for regulating the bacterial and fungal community structure, and it should be paid full attention during the agricultural cultivation of fluvo-aquic soil.
© 2020, Science Press. All right reserved. Number of references:55 Main heading:Fertilizers Controlled terms:Agricultural robots - Bacteria - Chemical analysis - Cultivation - Fungi - Phosphorus - Physicochemical properties - Soil moisture Uncontrolled terms:Agricultural cultivation - Community structures - Environmental factors - Fertilization experiment - Fungal community compositions - High-throughput sequencing - Positive correlations - Soil physico-chemical properties Classification code:483.1 Soils and Soil Mechanics - 804 Chemical Products Generally - 821.3 Agricultural Methods Numerical data indexing:Percentage 1.25e+00%, Percentage 1.26e+00%, Percentage 1.33e+01%, Percentage 1.80e+01% to 3.35e+01%, Percentage 2.27e+01% to 3.87e+01%, Percentage 2.49e+01%, Percentage 2.57e+01%, Percentage 2.99e+01%, Percentage 4.51e+00% DOI:10.13227/j.hjkx.202003068 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201408371201 Title:Spatial Characteristics and Ecological Risks of Perfluoroalkyl Substances in Coastal Urbanized Areas of China and South Korea Title of translation:中,韩滨海城市化区域水体全氟化合物的空间特征及生态风险 Authors:Yang, Hong-Fa (1, 2); Shi, Bin (2); Zhou, Yun-Qiao (2, 3); Yang, Lu (2, 3); Meng, Jing (2); Chen, Li-Qiang (4); Wang, Tie-Yu (2) Author affiliation:(1) School of Ecology and Environmental Science, Yunnan University, Kunming; 650091, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Institute of International Rivers and Eco-security, Yunnan University, Kunming; 650091, China Corresponding author:Shi, Bin(binshi@rcees.ac.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:4 Issue date:April 15, 2020 Publication year:2020 Pages:1607-1618 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:This study concentrated on the 15 perfluoroalkyl substances (PFASs) in the coastal areas of China and South Korea, an urbanized area with intensive human activities. In total, 126 water samples and 125 sediment samples were collected and determined by HPLC-MS/MS. Fifteen PFASs were detected at least once in all the sites. The total concentrations of PFASs in water and sediment samples ranged from 6.75 ng•L^-1 to 20 982 ng•L^-1 and from 0.229 ng•g^-1 to 53.8 ng•g^-1 (dw), respectively. The concentrations of PFASs in waters and sediments were relatively high in China, and PFOA was the predominant PFAS. In contrast, short chain compounds such as PFBA and PFPeA played a major role in water, and PFOS, PFBA, and PFOA dominated the sediment samples in South Korea. The partition coefficients of PFASs were closely related to the fraction of organic carbon in the sediment and the carbon chain length of PFASs. Among the 15 compounds, the partition coefficients of 9 were significantly correlated with the fraction of organic carbon (r>0.21, P<0.05), and the partition coefficient steadily increased with the increase of the carbon chain length. The results of ecological risk assessment suggested that the coastal urbanized areas of China and South Korea are still at a low risk. However, some specific areas also showed PFAS pollution. More attention should be paid to the potential health risks.
© 2020, Science Press. All right reserved. Number of references:54 Main heading:Risk assessment Controlled terms:Chain length - Coastal zones - Ecology - Health risks - Organic carbon - Sediments - Spatial distribution Uncontrolled terms:Coastal regions - Ecological risk assessment - Partition coefficient - Perfluoroalkyl substances - Potential health risks - Rapid urbanizations - Short chain compound - Spatial characteristics Classification code:454.3 Ecology and Ecosystems - 461.7 Health Care - 471 Marine Science and Oceanography - 483 Soil Mechanics and Foundations - 801.4 Physical Chemistry - 804.1 Organic Compounds - 914.1 Accidents and Accident Prevention - 921 Mathematics Numerical data indexing:Mass_Density 6.75e-09kg/m3 to 2.10e-05kg/m3 DOI:10.13227/j.hjkx.201910153 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20201108278068 Title:Variations of Stable Oxygen and Deuterium Isotopes in River and Lake Waters During Flooding Season Along the Middle and Lower Reaches of the Yangtze River Regions Title of translation:长江中下游地区丰水期河, 湖水氢氧同位素组成特征 Authors:Li, Jing (1); Wu, Hua-Wu (2); Zhou, Yong-Qiang (2); Zhao, Zhong-Hua (2); Wang, Xiao-Long (2); Cai, Yong-Jiu (2); He, Bin (2); Chen, Wen (2); Sun, Wei (2) Author affiliation:(1) College of Tourism and Geography, Jiujiang University, Jiujiang; 332005, China; (2) Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China Corresponding author:Wu, Hua-Wu(wuhuawu416@163.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:3 Issue date:March 15, 2020 Publication year:2020 Pages:1176-1183 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:Stable isotope tracers have been widely applied to water sources and evolution, transforming relations, and pollution sources of various water bodies. This study analyzed the spatial variations of δ²H and δ¹⁸O in river and lake waters during flooding season, and revealed the factors underlying their variations along the middle and lower reaches of the Yangtze River based on a field sampling campaign in July 2018. Our results showed that δ²H and δ¹⁸O in the Yangtze River water were enriched from the Three Gorges reservoir region to the lower reaches of the Yangtze River, which was closely linked to isotopic variations in precipitation. There was no significant difference in δ²H and δ¹⁸O values in the mainstream river waters between the Three Gorges Reservoir Region and Yichang-Chenglingji. However, d-excess values in river water displayed a small variation range. In contrast, δ²H and δ¹⁸O values in the lake group from Dongting to Jianghan and Huayang to Poyang Lake were lower than in the lake group from Taihu to the Yangtze Delta. Negative d-excess values were observed in lake water from Taihu to the Yangtze Delta, suggesting the combined influence of enriched isotopic compositions in precipitation and strong evaporative enrichment. Of the lakes, the highest isotopic values were found in Dianshan Lake and Datong Lake, whereas the lowest isotopic values were recorded in Dongting Lake and Poyang Lake because of their direct connection with the Yangtze River. The water regimes of Dongting Lake and Poyang Lake were influenced by the Yangtze River, especially when a high water level of the Yangtze River occurred, and thus altered the isotopic compositions of Dongting Lake and Poyang Lake water. Hence, these findings will provide scientific data revealing the precipitation-river-lake interactions and investigating the rational utilization and management of water resources in the middle and lower reaches of the Yangtze River regions.
© 2020, Science Press. All right reserved. Number of references:30 Main heading:Surface water resources Controlled terms:Floods - Information management - Isotopes - Lakes - Oxygen - Reservoirs (water) - River pollution - Rivers - Water levels - Water management Uncontrolled terms:Lake waters - Meteoric water lines - Middle and lower reaches of yangtze rivers - River water - Stable isotopes Classification code:441.2 Reservoirs - 444.1 Surface Water - 453 Water Pollution - 804 Chemical Products Generally DOI:10.13227/j.hjkx.201908160 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20210809953289 Title:Differences in Pollution Characteristics Under the Southerly and Easterly Wind in Beijing Title of translation:北京地区偏南风和偏东风条件下污染特征差异 Authors:Yin, Xiao-Mei (1, 2); Qiao, Lin (2); Zhu, Xiao-Wan (2); Guo, Heng (2); Liu, Xiang-Xue (2); Xiong, Ya-Jun (2) Author affiliation:(1) Institute of Urban Meteorology, China Meteorological Administration, Beijing; 100089, China; (2) Environment Meteorology Forecast Center of Beijing-Tianjin-Hebei, China Meteorological Administration, Beijing; 100089, China Corresponding author:Qiao, Lin(qiaolin0016@sina.com) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:11 Issue date:November 15, 2020 Publication year:2020 Pages:4844-4854 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:In this study, the hourly meteorological factors and PM2.5 concentrations during 2014-2019 in Beijing were analyzed, in order to explore the characteristics of the prevailing wind direction of pollution, and the corresponding long-term tendency. During the study period, 67% of pollution in Beijing occurred under the influence of southerly and easterly wind, and pollution was most likely to occur in winter, followed by spring and autumn. The average pollution probability of winter, spring, autumn and summer was 45.2%, 34.1%, 32.1%, and 26.1% and 47.0%, 45.8%, 39.7%, and 29.6% for southerly and easterly wind, respectively. In Beijing, the southerly wind appeared more frequently, but the pollution occurrence probability was higher under the control of easterly wind, with the maximum difference of 11.7% (2.8%-18.6%) in spring and the minimum difference of 1.8% (-7.6%-13.9%) in winter. During the past six years, the pollution probability decreased at a rate of 4.6%-8.0% and 5.5%-7.9% per year under the southerly and easterly wind influence, respectively. This was clearly reflected in reduced moderate and above levels of pollution. An analysis of both the pollution and meteorological factors under the two wind directions indicates that the visibility, mixing layer height, wind speed, and the frequency of hourly wind speed greater than 3 m•s^-1 were higher, and the relative humidity and dew point temperature were lower, when pollution occurred under the southerly wind, while the PM2.5 concentration of pollution was higher in winter and significantly lower in other seasons compared to that of the easterly wind. These findings show that when pollution occurred under the southerly wind, the carrying capacity and diffusion capacity of pollutants in the atmosphere was slightly better than that of the easterly wind, and the increased atmospheric water content under the easterly wind was more conducive to the maintenance and aggravation of pollution. Moreover, under the background of original emission levels, when adding urban heating in winter, the air mass transported by the southerly wind may be more conducive to increased PM2.5 concentration. Furthermore, pollution in Beijing tended to be an "easterly wind type" in spring, summer and autumn, but remained a "southerly wind type" in winter.
© 2020, Science Press. All right reserved. Number of references:39 Main heading:Pollution control Controlled terms:Atmospheric humidity - Probability - Springs (components) - Water pollution - Wind Uncontrolled terms:Atmospheric water - Dewpoint temperature - Meteorological factors - Mixing layer height - Occurrence probability - PM2.5 concentration - Prevailing wind directions - Wind influences Classification code:443.1 Atmospheric Properties - 453 Water Pollution - 601.2 Machine Components - 922.1 Probability Theory Numerical data indexing:Percentage -7.60e+00% to 1.39e+01%, Percentage 2.61e+01%, Percentage 2.80e+00% to 1.86e+01%, Percentage 2.96e+01%, Percentage 3.21e+01%, Percentage 3.41e+01%, Percentage 3.97e+01%, Percentage 4.52e+01%, Percentage 4.58e+01%, Percentage 4.60e+00% to 8.00e+00%, Percentage 4.70e+01%, Percentage 5.50e+00% to 7.90e+00%, Percentage 6.70e+01%, Velocity 3.00e+00m/s to 2.20e+01m/s DOI:10.13227/j.hjkx.202003195 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc. Accession number:20200408071319 Title:Research on Denitrification Performance of Enhanced Secondary Effluent by Embedded Denitrification Filler and Pilot Application Title of translation:包埋反硝化填料强化二级出水深度脱氮性能研究及中试应用 Authors:Zhou, Ya-Kun (1); Yang, Hong (1); Wang, Shao-Lun (1); He, Hai-Chao (1); Liu, Zong-Yue (1); Su, Yang (1); Zhang, Hui (2) Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing; 100124, China; (2) Beijing Drainage Group Co., Ltd., Beijing; 100022, China Corresponding author:Yang, Hong(yhong@bjut.edu.cn) Source title:Huanjing Kexue/Environmental Science Abbreviated source title:Huanjing Kexue Volume:41 Issue:2 Issue date:February 15, 2020 Publication year:2020 Pages:849-855 Language:Chinese ISSN:02503301 CODEN:HCKHDV Document type:Journal article (JA) Publisher:Science Press Abstract:The use of an embedded broad-spectrum high-efficiency denitrification filler to treat secondary effluent from municipal wastewater treatment plants can effectively reduce total nitrogen (TN) concentration of the effluent. This study consists of two parts. The D1 stage studies the adaptability of the secondary effluent based on the embedded denitrification, removal effect of total nitrogen, stable working conditions, and backwashing conditions; In the D2 stage, the change in the nitrogen removal performance of the filler under the condition of a year-long stable operation was studied. The variation in the microbial population before and after the operation of the embedded packing was studied by high-throughput sequencing and real-time quantitative PCR detecting system real-time (qPCR). In this research, the embedded denitrification filler had a water temperature of (24±1)℃, pH: 7.1, hydraulic retention time (HRT): 1 h, and filling rate: 10%. Sodium acetate was added to ensure stable operation for seven days. Under adequate carbon source conditions, the filler can adapt to the quality of secondary effluent water and achieve effluent TN<5mg•L^-1. By comparing and studying the effect of different HRT on the removal of filler TN, it is concluded that HRT is 30 min and the filling rate is 10%. After a year of stable operation under 7.2 m³•d^-1influent conditions, the TN removal rate can reach 90.42%, and the total nitrogen in the effluent can be stabilized below 5 mg•L^-1. In comparison with the backwashing effect, the backwashing strength was 5.2 L•(m²•s)^-1, and the cycle is three days long. High-throughput sequencing and real-time quantitative PCR analysis results show that the abundance and copy number of denitrifying functional genus in the filler before and after the operation exhibited significant changes, which indicated that the bacteria could achieve good self-growth under embedding conditions.
© 2020, Science Press. All right reserved. Number of references:28 Main heading:Effluents Controlled terms:Denitrification - Effluent treatment - Fillers - Nitrogen removal - Polymerase chain reaction - Sewage treatment plants - Sodium compounds - Wastewater treatment Uncontrolled terms:Backwash - High-throughput sequencing - Hydraulic retention time - Microbial community structures - Microbial immobilization - Microbial populations - Municipal wastewater treatment plants - Real-time quantitative PCR Classification code:452 Municipal and Industrial Wastes; Waste Treatment and Disposal - 801.2 Biochemistry - 802.2 Chemical Reactions Numerical data indexing:Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+01%, Percentage 9.04e+01%, Time 1.80e+03s, Time 3.60e+03s DOI:10.13227/j.hjkx.201908053 Database:Compendex Compilation and indexing terms, Copyright 2021 Elsevier Inc.