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<RECORD 1>

Accession number:20183805835625
Title:Accumulation of Cd and Its Risks in the Soils of the Xijiang River Drainage Basin in Guangxi
Title of translation:&#24191;&#35199;&#35199;&#27743;&#27969;&#22495;&#22303;&#22756;&#38217;&#21547;&#37327;&#29305;&#24449;&#21450;&#39118;&#38505;&#35780;&#20272;
Authors:Song, Bo (1, 2); Yang, Zi-Jie (1); Zhang, Yun-Xia (1); Wang, Fo-Peng (1); Zhou, Lang (1); Li, Li (1); Zhong, Xue-Mei (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 
Corresponding author:Zhong, Xue-Mei(zxm@glut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1888-1900
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To understand the distribution and risk of soil cadmium (Cd) in the Xijiang River drainage basin in Guangxi, a total of 2512 soil samples were collected nonferrous metal mining area, farmland (paddy soils and dryland soils) and the background soils, in the Xijiang River drainage basin in Guangxi.The results showed that Cd concentration was 0.514 mg&bull;kg<sup>-1</sup> in background soils significantly higher than previously resulted(0.148 mg&bull;kg<sup>-1</sup>)and that in Guangxi background soil(0.267 mg&bull;kg<sup>-1</sup>). The geometric average concentration of Cd in dryland soils, paddysoils and mining soils was 0.559, 0.787, 5.71 mg&bull;kg<sup>-1</sup>, respectively, which were significantly higher than background soils. The Cd concentration exceeded the background soils and baseline by 51.2% and 35.2% in dryland soil, 66.7% and 39.6% in paddy soil, 77.8% and 71.4% in mining soil, high Cd concentration occurred in the Nandan County, Dahua County, Duan County, Huanjiang County and Yizhou City, as well as Liujiang County, These regions have developed severe and even extremely serious pollution, medium-high pollution accumulation and higher-extremely high potential ecological risks. The Cd-pollution in soils in agricultural and mining soils in upstream of Xijiang River in Guangxi is serious, due to mining activities and high Cd geological background. People in the mining area and surrounding areas who live on local crops, vegetables, may expose to the Cd-pollution. It is recommended to further develop a Cd risk assessment through a soil-plant-human system, taking appropriate measures to control risk.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Soil pollution
Controlled terms:Cadmium - Catchments - Risk assessment - Risks - River pollution - Rivers - Soils
Uncontrolled terms:Accumulation - Average concentration - Cd concentrations - Geological background - High potential - Mining activities - River basins - Soil cadmiums
Classification code:453  Water Pollution - 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 3.52e+01%, Percentage 3.96e+01%, Percentage 5.12e+01%, Percentage 6.67e+01%, Percentage 7.14e+01%, Percentage 7.78e+01%
DOI:10.13227/j.hjkx.201707238

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 2>

Accession number:20183805835584
Title:Concentrations and Solubility of Trace Elements in Atmospheric Precipitation in Qingdao
Title of translation:&#38738;&#23707;&#22823;&#27668;&#38477;&#27700;&#20013;&#24494;&#37327;&#20803;&#32032;&#30340;&#27987;&#24230;&#21450;&#28342;&#35299;&#24230;
Authors:Li, Qian (1); Shi, Jin-Hui (1, 2); Li, Peng-Zhi (1); Yao, Xiao-Hong (1, 2); Gao, Hui-Wang (1, 2) 
Author affiliation:(1) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (2) Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China 
Corresponding author:Shi, Jin-Hui(engroup@ouc.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1520-1526
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Thirty-five atmospheric precipitation samples were collected at an urban site in Qingdao from June 2016 to May 2017. The total and soluble concentrations of eight trace elements in the samples were determined, and the variable characteristics of the concentrations and solubility of trace elements, as well as the factors affecting the solubility of trace elements in atmospheric precipitation, have been discussed. Based on the overall data, the total concentrations of the trace elements were found to be in the order Al&gt;Fe&gt;Zn&gt;Mn&gt;Ba&gt;Pb&gt;Sr&gt;V, but the soluble concentrations of the trace elements were in the order Zn&gt;Al&gt;Mn&gt;Fe&gt;Ba&gt;Sr&gt;Pb&gt;V. Solubility was about 5% for the crustal elements Al and Fe, and the solubility of the elements affected by anthropogenic sources was relatively higher, 10%-40% for Pb and Ba, 20%-60% for Mn and Sr, and nearly 55% for Zn and V. The total and soluble concentrations of the trace elements were higher in winter and spring than in summer and autumn, but element solubility in spring was the highest. During continuous rainfall, the total concentrations of trace elements in precipitation decreased appreciably, but the variation trend of the solubility of trace elements was not consistent during the different rainfall processes. The variation in pH was the main factor controlling the solubility of trace elements in precipitation.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Trace elements
Controlled terms:Aerosols - pH - Rain - Solubility - Urban growth
Uncontrolled terms:Anthropogenic sources - Atmospheric precipitation - Crustal elements - Qingdao - Rainfall process - Urban site
Classification code:403.1  Urban Planning and Development - 443.3  Precipitation - 801.1  Chemistry, General - 801.4  Physical Chemistry
Numerical data indexing:Percentage 1.00e+01% to 4.00e+01%, Percentage 2.00e+01% to 6.00e+01%, Percentage 5.00e+00%, Percentage 5.50e+01%
DOI:10.13227/j.hjkx.201708034

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 3>

Accession number:20183805835366
Title:Seasonal Variation in Nitric Oxide Emission from an Agricultural Headwater Ditch in the Hilly Purple Soil Area and the Factors Influencing Emission
Title of translation:&#32043;&#33394;&#22303;&#19992;&#38517;&#21306;&#20892;&#30000;&#28304;&#22836;&#27807;&#28192;&#19968;&#27687;&#21270;&#27694;&#25490;&#25918;&#30340;&#23395;&#33410;&#24046;&#24322;&#21450;&#24433;&#21709;&#22240;&#32032;
Authors:Tian, Lin-Lin (1, 2, 3); Ren, Guang-Qian (2, 4); Zhu, Bo (1, 2) 
Author affiliation:(1) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China; (2) Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu; 610041, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) School of the Environment and Safety Engineering, University of Jiangsu, Zhenjiang; 212013, China 
Corresponding author:Zhu, Bo(bzhu@imde.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1952-1961
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Agricultural headwater ditches are important pathways of reactive nitrogen loss from adjacent croplands, and also act as hotspots for reactive nitrogen transformation. In this study, NO emissions from a typical agricultural ditch in the hilly area of central Sichuan Basin were measured by the closed static chamber-chemiluminescence method, from December 2014 to November 2015. The results showed that the cumulative NO emissions from the sediment-water interface without vegetation (NV) and the ditch ecosystem with natural vegetation (&#8548;) were-0.4 g&bull;(hm<sup>2</sup>&bull;a)<sup>-1</sup> and 14.17 g&bull;(hm<sup>2</sup>&bull;a)<sup>-1</sup>, respectively. The combined annual NO emission flux for the agricultural headwater ditch ecosystem was 11.27 g&bull;(hm<sup>2</sup>&bull;a)<sup>-1</sup>, with a mean NO emission rate of 0.13 &mu;g&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>. A net source of NO from the ditch ecosystem only occurred in summer, which had a significantly higher cumulative NO emission than those in the other seasons. The seasonal variation in NO emissions was mainly regulated by the seasonal changes in NO<inf>3</inf><sup>-</sup>-N concentrations and temperature in the overlying water. Meanwhile, the presence of vegetation in the ditch ecosystem significantly increased NO emission rates, whereas it did not markedly influence the annual NO emission.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:45
Main heading:Soil pollution
Controlled terms:Agricultural runoff - Agriculture - Catchments - Ecosystems - Nitrates - Nitric oxide - Nitrogen - Particulate emissions - Soils - Temperature  - Vegetation
Uncontrolled terms:Central Sichuan Basin - Natural vegetation - Nitric oxide emissions - Nitrogen cycling - Reactive nitrogen - Seasonal changes - Seasonal variation - Sediment water interface
Classification code:451.1  Air Pollution Sources - 454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 641.1  Thermodynamics - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5  Agricultural Wastes
DOI:10.13227/j.hjkx.201707250

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 4>

Accession number:20183805835600
Title:Degradation of Triclosan by Heat Activated Persulfate Oxidation
Title of translation:&#28909;&#27963;&#21270;&#36807;&#30827;&#37240;&#30416;&#38477;&#35299;&#19977;&#27695;&#29983;
Authors:Jiang, Meng-Di (1); Zhang, Qing-Yue (1); Ji, Yue-Fei (1); Lu, Jun-He (1) 
Author affiliation:(1) College of Resources &amp; Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China 
Corresponding author:Lu, Jun-He(jhlu@njau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1661-1667
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sulfate radical (SO<inf>4</inf><sup>&bull;-</sup>)-based advanced oxidation technologies (SR-AOPs) are widely used for remediation of contaminated groundwater and soils. This study investigated the reaction kinetics, products, and transformation pathways of triclosan, a widely used antimicrobial agent, during its degradation by heat activated persulfate oxidation. Experimental results revealed that increasing temperature or initial persulfate concentration significantly enhanced the degradation of triclosan. The reaction could be fitted in the pseudo-first-order kinetic model and the activation energy (E<inf>a</inf>) was determined to be 142 kJ&bull;mol<sup>-1</sup>. The presence of humic acid markedly inhibited triclosan degradation, whereas chloride (Cl<sup>-</sup>) showed a more complicated effect. Triclosan degradation was slightly accelerated in the presence of 5 &mu;mol&bull;L<sup>-1</sup> Cl<sup>-</sup>, however, a higher concentration of Cl<sup>-</sup> (e.g., 10 &mu;mol&bull;L<sup>-1</sup>) showed an inhibitory effect. Using liquid chromatography-mass spectrometry, a total of six transformation products, including 4-chlorocatechol, 2,4-dichlorophenol, and 2-chloro-5-(2,4-dichloro-6-hydroxyphenoxy)-1,4-benzoquinone, were identified. Accordingly, the cleavage of the ether bond and hydroxylation of the phenol ring were proposed as the principal pathways of triclosan degradation upon reaction with SO<inf>4</inf><sup>&bull;-</sup>. The findings of this study can be used to evaluate the feasibility of decontamination of triclosan by SR-AOPs.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Biodegradation
Controlled terms:Activation energy - Antimicrobial agents - Chlorine compounds - Enzyme kinetics - Free radical reactions - Groundwater - Groundwater pollution - Kinetics - Liquid chromatography - Mass spectrometry  - Organic polymers - Oxidation - Reaction kinetics - Remediation - Sulfur compounds
Uncontrolled terms:Activation energies (Ea) - Advanced oxidation technology - Heat activation - Liquid chromatography - mass spectrometries - Pseudo-first order kinetic model - Sulfate radicals - Transformation products - Triclosan
Classification code:444.2  Groundwater - 454.2  Environmental Impact and Protection - 461.6  Medicine and Pharmacology - 461.8  Biotechnology - 801  Chemistry - 801.2  Biochemistry - 802.2  Chemical Reactions - 815.1.1  Organic Polymers - 931  Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Molar_Concentration 1.00e-02mol/m3 to 2.20e-02mol/m3
DOI:10.13227/j.hjkx.201707201

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 5>

Accession number:20183805835578
Title:Effect of Relative Humidity on Particulate Matter Concentration and Visibility During Winter in Chengdu
Title of translation:&#25104;&#37117;&#24066;&#20908;&#23395;&#30456;&#23545;&#28287;&#24230;&#23545;&#39063;&#31890;&#29289;&#27987;&#24230;&#21644;&#22823;&#27668;&#33021;&#35265;&#24230;&#30340;&#24433;&#21709;
Authors:Liu, Fan (1); Tan, Qin-Wen (2); Jiang, Xia (1); Jiang, Wen-Ju (1); Song, Dan-Lin (2) 
Author affiliation:(1) College of Architecture &amp; Environment, Sichuan University, Chengdu; 610065, China; (2) Chengdu Academy of Environmental Sciences, Chengdu; 610072, China 
Corresponding author:Tan, Qin-Wen(tanqw1979@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1466-1472
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effect of relative humidity (RH) on particulate matter concentrations and atmosphere visibility were investigated using the continuous on-line observed data of Chengdu city during December 2015, including RH, visibility, the concentrations of particulate matters (PM<inf>10</inf>, PM<inf>2.5</inf> and PM<inf>1</inf>) and gaseous pollutants (SO<inf>2</inf> and NO<inf>2</inf>), and the concentrations of SO<inf>4</inf><sup>2-</sup> and NO<inf>3</inf><sup>-</sup> in PM<inf>2.5</inf>. The results showed that the haze process occurred because of the synergistic effects of higher particulate matter concentrations and RH, leading to the reduction of visibility. The average ratio of PM<inf>2.5</inf> to PM<inf>10</inf> was 64% and it significantly increased with the increase of RH during observation period, which indicated that the pollution of fine particles during winter in Chengdu was serious, and high RH aggravated the pollution caused by fine particles.Visibility decreased exponentially with the increase of particulate matter concentrations. When RH was higher, visibility was lower at the same concentrations of particulate matter.RH had a strong effect on visibility at lower particle concentrations, while the effect of RH on the visibility decreased, and atmospheric extinction was controlled by PM<inf>2.5</inf> concentrations at higher particle concentrations. With RH increasing from less than 40% to more than 70%, the average sulfur oxidation ratio (SOR) and nitrogen oxidation ratio (NOR) increased from 0.27 and 0.11 to 0.40 and 0.19, respectively, indicating that higher RH significantly promoted the formation of secondary sulfate and nitrate. Secondary sulfate and nitrate separately or coordinatively influenced the air quality.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Particles (particulate matter)
Controlled terms:Air quality - Atmospheric humidity - Fog - Nitrates - Sulfur compounds - Visibility
Uncontrolled terms:Atmospheric extinction - Chengdu - Gaseous pollutants - Inorganic salts - Observation Period - Particle concentrations - Particulate Matter - PM2.5 concentration
Classification code:443.1  Atmospheric Properties - 451.2  Air Pollution Control - 741.2  Vision - 804.2  Inorganic Compounds - 951  Materials Science
Numerical data indexing:Percentage 6.40e+01%, Percentage 7.00e+01%
DOI:10.13227/j.hjkx.201707112

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 6>

Accession number:20183805835607
Title:Mechanism of Action of Activated Sludge Properties in Nitrogen Removal by Endogenous Denitrification Through an Intelligent Aeration-controlled A/O Process
Title of translation:&#26234;&#33021;&#21270;&#26333;&#27668;&#25511;&#21046;A/O&#24037;&#33402;&#27963;&#24615;&#27745;&#27877;&#29305;&#24615;&#28436;&#21270;&#23545;&#20869;&#28304;&#21453;&#30813;&#21270;&#33073;&#27694;&#30340;&#20316;&#29992;&#26426;&#21046;
Authors:Xu, Min-Yang (1); Hu, Zhan-Bo (1, 2); Zhang, Sui-Sheng (3); Li, Hao-Hang (1) 
Author affiliation:(1) School of Resources, Environment and Materials, Guangxi University, Nanning; 530004, China; (2) Guangxi Yijiang Environmental Protection Technology Co., Ltd., Nanning; 530004, China; (3) Department of Agriculture and Environmental Engineering, Guangxi Vocational &amp; Technical College, Nanning; 530226, China 
Corresponding author:Hu, Zhan-Bo(hzb2005@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1720-1730
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to evaluate the mechanism of action of activated sludge properties in nitrogen removal by endogenous denitrification (henceforth EDNR), a new kind of automatic oxygen supply device(AOSD), was applied to the A/O process. The domestication effect of the aeration mode on the activated sludge properties and microbial communities was investigated under the intelligent aeration-controlled A/O process (I-A/O)and the continuous aeration A/O process (C-A/O). The results demonstrated that the effluent NH<inf>4</inf><sup>+</sup>-N and NO<inf>2</inf><sup>-</sup>-N components showed obvious accumulation efficiencies and activated sludge generated conspicuous limited bulking in the I-A/O process. Domesticated sludge in the I-A/O process was able to enrich more SCOD to transfer into the polymeric substances as Gly, under a rich exogenous carbon supply state, and stimulated nitrogen removal by endogenous denitrifying under a scarce exogenous carbon supply state. The EDNR rate went up to 0.83 mg&bull;(L&bull;h)<sup>-1</sup> in the I-A/O process, which was more than that achieved by the C-A/O process. The microbial communities in the two processes were evaluated by the Illumina HiSeq high-throughput sequencing technology. The results showed that there was no obvious difference in the sludge microbial community diversity between the two processes, but the Candidate division TM7 proliferated in the I-A/O process, and become the abundant taxa to prompt limited filamentous sludge bulking and Gly storage capability enhancement. The oxygen supply mode of AOSD made the activated sludge properties and microbial communities to be screened selectively in the new environment, aerobic heterotrophic bacterial activity to decline, and endogenous denitrifying action to strengthen, which made the I-A/O process implement a kind of dynamic balanced state that limited the DO demand.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Process control
Controlled terms:Activated sludge process - Carbon - Denitrification - Microorganisms - Nitrogen removal - Oxygen supply - Sewage sludge - Throughput
Uncontrolled terms:A/O process - Activated sludge - Automatic oxygen supply device(AOSD) - Endogenous denitrification - High-throughput sequencing - Mechanism of action - Microbial communities - Polymeric substance
Classification code:452.2  Sewage Treatment - 461.9  Biology - 802.2  Chemical Reactions - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201706240

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 7>

Accession number:20183805835604
Title:Pilot-scale Experiment on Enrichment of Nitrifying Activated Sludge and Its Application in Enhancing a Wastewater Biological Treatment System Against Ammonia Shocking Loads
Title of translation:&#30813;&#21270;&#27745;&#27877;&#23500;&#38598;&#21450;&#20854;&#24378;&#21270;&#39640;&#27688;&#27694;&#20914;&#20987;&#30340;&#20013;&#35797;&#30740;&#31350;
Authors:Sheng, Xiao-Lin (1); Cui, Can-Can (1, 2); Wang, Jia-De (2); Liu, Rui (1); Xu, Feng (4); Chen, L&uuml;-Jun (1, 3) 
Author affiliation:(1) Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environment in Yangtze Delta Region Institute of Tsinghua University, Jiaxing; 314006, China; (2) College of Environment, Zhejiang University of Technology, Hangzhou; 310014, China; (3) School of Environment, Tsinghua University, Beijing; 100084, China; (4) Jiaxing Lvye Environmental Engineering Co., Ltd., Jiaxing; 314006, China 
Corresponding author:Liu, Rui(liuruitsinghuazj@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1697-1703
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Nitrifying activated sludge (NAS) was enriched in a membrane bioreactor (MBR) with pre-treated municipal wastewater and additional ammonium sulfate as the culture medium. The influences of temperature, dissolved oxygen (DO), ammonia nitrogen volumetric load, free ammonia (FA), and free nitrite (FNA) on the enrichment of NAS were investigated, the cost of the process was evaluated, and then NAS's application in enhancing a wastewater biological treatment system against ammonia shocking loads was attempted. The results showed that after 182 days of cultivation in an MBR, NAS had a nitrification activity of 98.41 mg&bull;(L&bull;h)<sup>-1</sup>, which was 30-times higher than that of the seeding sludge. The yield of NAS was 14.96 mg&bull;(L&bull;d)<sup>-1</sup>, costing 3.52 Yuan for 1 kg. Temperature was found to be a key factor affecting the sludge nitrification activity. The sludge nitrification activity was decreased to 1/3 of the maximum value at temperatures below 15.0&#8451;, while lowering the ammonium volumetric load retarded the decrease in the sludge nitrification activity to some extent. In addition, dissolved oxygen deficiency resulted in nitrite accumulation, and thereby slowed down the NAS enrichment rate. The enriched NAS was then applied to a wastewater biological treatment pilot equipment, which had just been exposed to an ammonium shocking load. The removal rate of ammonia nitrogen in the biological system increased from 29.4% to 88.4% after 2.0% of NAS was inoculated. The enhanced biological system retained ammonia removal rates of as high as 99.0%, even as the temperature dropped to 13.3&#8451;&plusmn;1.6&#8451; afterwards. The above pilot-experiment results suggested that enriched nitrifying sludge is suitable for quickly increasing the start-up or recovery rates of the nitrifying function in a biological system.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Biological water treatment
Controlled terms:Ammonia - Biochemical engineering - Biochemical oxygen demand - Biological systems - Bioreactors - Dissolved oxygen - Nitration - Nitrification - Nitrogen - Nitrogen removal  - Sulfur compounds - Wastewater treatment
Uncontrolled terms:Membrane bio reactor (MBR) - Membrane bioreactor - Municipal wastewaters - Nitrification activity - Nitrifying activated sludges - Nitrite accumulation - Pilot-scale experiments - Wastewater biological treatment
Classification code:445.1  Water Treatment Techniques - 452.4  Industrial Wastes Treatment and Disposal - 461.8  Biotechnology - 461.9  Biology - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 805.1.1  Biochemical Engineering
Numerical data indexing:Age 4.99e-01yr, Mass 1.00e+00kg, Percentage 2.00e+00%, Percentage 2.94e+01% to 8.84e+01%, Percentage 9.90e+01%
DOI:10.13227/j.hjkx.201706191

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 8>

Accession number:20183805835613
Title:Aerobic Denitrification and Microbial Community Shift in SBR Bioaugmented with Strains YH01 and YH02
Title of translation:&#22797;&#21512;&#33740;&#26666;YH01+YH02&#24378;&#21270;SBR&#22909;&#27687;&#21453;&#30813;&#21270;&#33073;&#27694;&#21450;&#33740;&#32676;&#32467;&#26500;&#20998;&#26512;
Authors:Chen, Hai-Sheng (1); Cao, Gang (1, 2); Zhang, Di (1); Huang, Zheng-Zheng (1); Mo, Ce-Hui (1, 2) 
Author affiliation:(1) School of Environment, Jinan University, Guangzhou; 510630, 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:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1773-1781
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The enhanced aerobic denitrification capability of the mixed strains YH01+YH02 in utilizing potassium nitrate, and the dynamic changes in the microbial community component during the period of operation, were evaluated. The microbial community in different stages of the SBR was analyzed by using high-throughput sequencing technology after inoculation with YH01+YH02. The results showed that the NO<inf>3</inf><sup>-</sup>-N, TN, and COD removal efficiencies increased by 12.1%, 9.2%, and 9.4%, respectively. The relative abundances of the microbes in the microbial community increased at the genus level, and the diversity in the microbial community decreased after enhancement. Principal component analysis and UPGMA analysis revealed that the period of SBR operation was roughly divined into four phases. The relative abundances of Delftia and Acidovorax increased during the period of operation, and YH01+YH02 exhibited excellent compatibility with the SBR ecosystem and played an important part in aerobic denitrification.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Principal component analysis
Controlled terms:Denitrification - Microorganisms - Potash - Potassium Nitrate - Throughput
Uncontrolled terms:Heterotrophic nitrification-aerobic denitrifications - High-throughput sequencing - Microbial communities - Mixed strain - SBR reactor
Classification code:461.9  Biology - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.21e+01%, Percentage 9.20e+00%, Percentage 9.40e+00%
DOI:10.13227/j.hjkx.201708253

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 9>

Accession number:20183805835614
Title:Performance, Sludge Characteristics, and the Microbial Community Dynamics of Bulking Sludge Under Different Nitrogen and Phosphorus Imbalances
Title of translation:&#27694;&#30967;&#22833;&#34913;&#19979;&#33192;&#32960;&#27745;&#27877;&#24615;&#33021;&#21450;&#33192;&#32960;&#33740;&#32676;&#33853;&#32467;&#26500;&#21464;&#21270;
Authors:He, Xue-Meng (1); Ding, Li-Li (1); Zhang, Lu-Lu (1); Gu, Zhuo-Jiang (2); Ren, Hong-Qiang (1) 
Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing; 210023, China; (2) Hisun Pharmaceutical Company Limited, Hangzhou; 311404, China 
Corresponding author:Ding, Li-Li(dinglili@nju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1782-1793
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this paper, the performance, characteristics of the bulking sludge, and the variations in the microbial community (including the bulking bacteria) under different nitrogen and phosphorus imbalances were compared, using high-throughput sequencing (16S rRNA) and the high performance liquid chromatography (HPLC) technology. The results showed that after seeding bulking sludge in the A/O process and operating for a period of time, the sludge settleability of the nitrogen limitation alone reactor (R<inf>N</inf>) could recover to normal [sludge volume index (SVI)&lt;150 mL&bull;g<sup>-1</sup>], while the SVI of the phosphorus limitation alone reactor (R<inf>P</inf>) improved slightly; the control reactor (R<inf>0</inf>, C/N/P=100/5/1) exhibited the highest SVI index (SVI=1 496 mL&bull;g<sup>-1</sup>), followed by the reactor of simultaneous nitrogen and phosphorus limitations (R<inf>NP</inf>). Under normal nutritional conditions, Pearson correlation analysis showed a significant negative correlation between the lipopolysaccharide (LPS) relative content (LPS/MLVSS) and the settleability of bulking sludge (r=-0.625, P&lt;0.05), while under nutrient limitation conditions, LPS showed high accuracy in reflecting the biomass of the activated sludge. Thiothrix was the dominant bulking bacteria in all the reactors. PCoA analysis showed that the migration of the community in the reactors experienced nitrogen limitation (R<inf>NP</inf>, R<inf>N</inf>) changes greatly during the stages &#8545; and &#8546;, while RDA analysis showed that the correlation of Thiothrix with the settling performance and oxygen consumption rate was significant.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:54
Main heading:Nitrogen
Controlled terms:Activated sludge process - Bacteria - Correlation methods - High performance liquid chromatography - Phosphorus - RNA
Uncontrolled terms:Bulking sludge - Lipopolysaccharides - Microbial communities - Nitrogen and phosphorus - Settleability
Classification code:452.2  Sewage Treatment - 461.2  Biological Materials and Tissue Engineering - 804  Chemical Products Generally - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201708094

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 10>

Accession number:20183805835581
Title:Chemical Composition Characteristics of PM<inf>2.5</inf> Emitted by Medium and Small Capacity Coal-fired Boilers in the Yangtze River Delta Region
Title of translation:&#38271;&#19977;&#35282;&#22320;&#21306;&#20013;&#23567;&#29123;&#29028;&#38149;&#28809;PM<inf>2.5</inf>&#25104;&#20998;&#35889;&#29305;&#24449;
Authors:Xu, Jian (1); Huang, Cheng (2, 3); Li, Li (2, 3); Chen, Yong-Hang (1); Lou, Sheng-Rong (2, 3); Qiao, Li-Ping (2, 3); Wang, Hong-Yu (1) 
Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) State Environment Protection Key Laboratory of Formation and Prevention of the Urban Air Complex Pollution, Shanghai; 200233, China 
Corresponding author:Huang, Cheng(huangc@saes.sh.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1493-1501
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Seven small and medium coal-fired boilers were selected to analyze the emission factors and chemical composition characteristics of PM<inf>2.5</inf>, and the efficiency of the dust collection unit in removing PM<inf>2.5</inf>, OC, and EC of different particle sizes. At the outlet of the dust collection unit, PM<inf>2.5</inf> mass emission factor was around 0.047-0.283 g&bull;kg<sup>-1</sup> with an average of (0.146&plusmn;0.081) g&bull;kg<sup>-1</sup>. SO<inf>4</inf><sup>2-</sup> was the most abundant ionic component, followed by NH<inf>4</inf><sup>+</sup> and Ca<sup>2+</sup>. S was the most abundant among all the elements, followed by Al, Ca, and Fe. The contents of OC and EC fluctuated greatly, and the ratio of OC and EC produced by each boiler was greater than one. In the range of the measured particle sizes, the mass concentration of PM<inf>2.5</inf> showed a singlet or bimodal distribution, and the peak value appeared at 0.07-0.12 &mu;m and greater than 1 &mu;m in bimodal distribution. The mass concentration of OC showed a bimodal or trimodal distribution, and the peak value appeared at 0.04 &mu;m, 0.20-0.31 &mu;m, and greater than 1 &mu;m in trimodal distribution. The efficiencies of the dust collection unit in removing PM<inf>2.5</inf>, OC, and EC were 66%, 53%, and 23%, respectively.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Coal fired boilers
Controlled terms:Calcium compounds - Chemical analysis - Coal - Coal dust - Dust collectors - Efficiency - Fossil fuel power plants - Iron compounds - Particle size - Particle size analysis
Uncontrolled terms:Bimodal distribution - Chemical compositions - Different particle sizes - Emission factors - Mass concentration - PM2.5 - Removal efficiencies - Yangtze river delta
Classification code:524  Solid Fuels - 913.1  Production Engineering - 951  Materials Science
Numerical data indexing:Percentage 2.30e+01%, Percentage 5.30e+01%, Percentage 6.60e+01%, Size 1.00e-06m, Size 2.00e-07m to 3.10e-07m, Size 4.00e-08m, Size 7.00e-08m to 1.20e-07m
DOI:10.13227/j.hjkx.201707034

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 11>

Accession number:20183805835594
Title:Characteristics of Phosphorus Fractions and Phosphate Diffusion Fluxes of Sediments in Cascade Reservoirs of the Huangbai River
Title of translation:&#40644;&#26575;&#27827;&#27969;&#22495;&#26799;&#32423;&#27700;&#24211;&#27785;&#31215;&#29289;&#30967;&#24418;&#24577;&#29305;&#24449;&#21450;&#30967;&#37322;&#25918;&#36890;&#37327;&#20998;&#26512;
Authors:Liu, Jia (1); Lei, Dan (1); Li, Qiong (2); Wang, Liang (2); Zhang, Ping (2); Xiao, Shang-Bin (1) 
Author affiliation:(1) College of Hydraulic &amp; Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Yichang Survey Bureau of Hydrology and Water Resources, Yichang; 443002, China 
Corresponding author:Xiao, Shang-Bin(shangbinx@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1608-1615
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The Huangbai river, with a large phosphorite deposit in the basin upstream, is the drinking-water source of Yichang city, China, and water blooms often break out in it in present times. To investigate the internal contamination load, the distribution and vertical variation of sediment phosphorus and its fractions were analyzed. Phosphorus flux across the sediment-water surface was preliminarily analyzed in three reservoirs in the basin. The results showed that the concentration of total phosphorus (TP) decreased from the upstream to the downstream reservoirs of the basin, and the means of the TP were (8 070.0&plusmn;2 251.4), (2 681.2&plusmn;1 709.8), and (2 656.6&plusmn;1 599.7) mg&bull;kg<sup>-1</sup>, in the three reservoirs, respectively. This shows that the basin is at a highly polluted level. There were similar tendencies in the concentrations of dissolved oxygen (DO) and chlorophyll a in the surface water. The order of the phosphorus fractions was HCl-P&gt;OP&gt;NaOH-P in most sites. According to Fick's First Law, the flux of PO<inf>4</inf><sup>3-</sup>-P across the sediment-water surface was 0.017 9-0.182 5 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup>, and it decreased from the upstream to the downstream reservoirs. The flux was positively related to HCl-P, OP, and TP in the high phosphorus concentration basin.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Rivers
Controlled terms:Biochemical oxygen demand - Dissolved oxygen - Potable water - Reservoirs (water) - River pollution - Sediments - Sodium hydroxide
Uncontrolled terms:Diffusion fluxes - Drinking water sources - Fick's Law - Internal contaminations - Phosphate mining - Phosphorite deposits - Phosphorus concentration - Phosphorus fractions
Classification code:441.2  Reservoirs - 444  Water Resources - 453  Water Pollution - 483  Soil Mechanics and Foundations
DOI:10.13227/j.hjkx.201705112

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 12>

Accession number:20183805835612
Title:Microbiological Characteristics of a Post Solid-Phase Denitrification Biofilter Process
Title of translation:&#21518;&#32622;&#22266;&#30456;&#21453;&#30813;&#21270;&#28388;&#27744;&#24037;&#33402;&#27839;&#31243;&#24494;&#29983;&#29289;&#29305;&#24615;
Authors:Zhang, Qian (1); Ji, Fang-Ying (2); Xu, Xuan (2) 
Author affiliation:(1) School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing; 400054, China; (2) Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing; 400045, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1763-1772
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To solve the problems of high energy consumption, complex process, and low nitrogen removal efficiency of the currently available low carbon source wastewater treatment processes, a novel coagulation sedimentation/post solid-phase denitrification biofilter process was proposed. Domestic wastewater with low carbon to nitrogen ratio was treated. The changes in the microbial community structure along the biofilters were studied and the functional bacteria were identified using the polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE). The results showed that the microbial diversity and richness of the microorganisms increased from the bottom to the top along the nitrification filter, while in the denitrification filter, there parameters increased firstly and then decreased from the bottom to the top along the cylinder. A bigger population of nitrifying and denitrifying bacteria was observed at the top and the middle of the nitrification and denitrification biofilter, respectively. Moreover, Nitrosomonas sp. Nm47 and Candidatus Nitrospira defluvii were the predominant nitrifying bacteria in the nitrification biofilter, and Myxobacteria and Rubrivivas gelatinosus were the predominant denitrifying bacteria in the solid-phase denitrification biofilter.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Bacteria
Controlled terms:Biofilters - Carbon - Denitrification - Electrophoresis - Energy utilization - Nitrification - Nitrogen removal - Polymerase chain reaction - Wastewater treatment
Uncontrolled terms:Biological filters - Microbial communities - PCR-DGGE - Solid carbon sources - Solid-phase
Classification code:452.4  Industrial Wastes Treatment and Disposal - 525.3  Energy Utilization - 801  Chemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201709049

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 13>

Accession number:20183805835585
Title:Occurrence and Gas-particle Partitioning of Polycyclic Aromatic Hydrocarbons in the Air of Liaodong Bay
Title of translation:&#36797;&#19996;&#28286;&#22823;&#27668;&#20013;&#22810;&#29615;&#33459;&#28867;&#30340;&#21547;&#37327;&#32452;&#25104;&#21450;&#27668;&#31890;&#20998;&#37197;
Authors:Zhang, Yu-Feng (1, 2, 3); Song, Yong-Gang (1, 2); Tian, Jin (1, 2); Zhao, Hai-Bo (1, 2); Yang, Shuang (1, 2); Wu, Jin-Hao (1, 2) 
Author affiliation:(1) Liaoning Ocean and Fisheries Science Research Institute, Dalian; 116023, China; (2) Liaoning Ocean Environment Monitoring Station, Dalian; 116023, China; (3) College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao; 266100, China 
Corresponding author:Wu, Jin-Hao(jinhaow@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1527-1536
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The gas-and particle-phase polycyclic aromatic hydrocarbons (PAHs) were collected from the air of Liaodong Bay in May and August to investigate their occurrence and gas/particle distribution. The 24 PAHs were analyzed for gas-and particle-phase samples, and the concentrations of total gas-and particle-phase PAHs were found to be 28.8 ng&bull;m<sup>-3</sup> and 24.0 ng&bull;m<sup>-3</sup>, respectively. The concentrations of the gas-phase PAHs were higher in August than in May, and the concentrations of the particle-phase PAHs were higher in May than in August. The low molecular weight PAHs were mainly distributed in the gas-phase, and the high molecular weight PAHs were mainly distributed in the particle-phase; the medium molecular weight PAHs were more easily affected by the environmental conditions than the low and high molecular weight PAHs. The value of K<inf>p</inf> increased with an increase in the molecular weight. The slopes m for regressed lgK<inf>p</inf>-lgP<inf>L</inf> and lgK<inf>p</inf>-lgK<inf>OA</inf> plots were -0.35 and 0.37, deviated from -1 and+1 for the equilibrium states of gas/particle partitioning. The equilibrium states of the lgK<inf>p</inf>-lgK<inf>OA</inf>, lgK<inf>p</inf>-lgP<inf>L</inf>, and soot-air models were applied; the predicted results of the 5-ring PAHs fitted well with the field measure results. The predicted results of the soot-air model were much closer to the field measure results than the results of the lgK<inf>P</inf>-lgK<inf>OA</inf> and lgK<inf>P</inf>-lgP<inf>L</inf>models; compared to their heavier counterparts, the low and medium molecular weight PAHs were influenced to a greater extent by soot.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Polycyclic aromatic hydrocarbons
Controlled terms:Earth atmosphere - Gases - Hydrocarbons - Mineral oils - Molecular weight - Soot
Uncontrolled terms:Distribution - Environmental conditions - Gas-particle partitioning - Gas/particle distribution - High molecular weight - Liaodong Bay - Low molecular weight - Polycyclic aromatic hydrocarbons (PAHS)
Classification code:443.1  Atmospheric Properties - 513.3  Petroleum Products - 804  Chemical Products Generally - 804.1  Organic Compounds - 931.3  Atomic and Molecular Physics
DOI:10.13227/j.hjkx.201708148

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 14>

Accession number:20183805835622
Title:Spatial Distribution of DDTs and PCBs in Wild Fish from Hong Kong Coastal Areas and Potential Human Health Risk Assessment
Title of translation:&#39321;&#28207;&#21608;&#36793;&#28023;&#22495;&#37326;&#29983;&#40060;&#20307;&#20869;DDTs&#21644;PCBs&#30340;&#21547;&#37327;&#20998;&#24067;&#21644;&#39135;&#29992;&#39118;&#38505;&#35780;&#20272;
Authors:Su, Yang (1, 2); Bao, Lian-Jun (3); Zeng, Eddy Y (1, 3) 
Author affiliation:(1) State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Environment, Jinan University, Guangzhou; 510632, China 
Corresponding author:Bao, Lian-Jun(baolianjun@jnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1861-1871
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To examine the distributional patterns of persistent organic pollutants in the wild fish of Hong Kong and assess the health risks associated with consuming them, two typical kinds of persistent organic pollutants, such as dichlorodiphenyltrichloroethane (DDTs) and polychlorinated biphenyls (PCBs), were determined in 31 kinds of fishes caught from the coastal areas of Hong Kong. The results indicate that the concentrations of DDTs and PCBs in the wild fishes were in the ranges of 0.44-17 ng&bull;g<sup>-1</sup> and 0.028-6.3 ng&bull;g<sup>-1</sup>, respectively, which were at the low end of the global ranges. Spatially, the lowest concentrations of DDTs and PCBs were found in the fishes occurring in the west of Lantau Island and Tolo Harbor. Furthermore, the feeding habits and living environments of the fishes could have some influence on the accumulation of DDTs and PCBs in them. Source diagnostics indicated that DDTs in these fishes mainly originated from historical residues, but the fishes which migrate for relatively longer distances may be subject to DDT contamination in the estuaries. Finally, human health risk assessments suggested that the increased potential lifetime cancer risk of local adolescences and adults exposed to DDTs and PCBs via wild fish consumption was high. Therefore, the local residents in Hong Kong should reduce their daily intake of wild fish caught from the surrounding coastal regions.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Organic pollutants
Controlled terms:Coastal zones - Fish - Health - Health risks - Polychlorinated biphenyls - Risk assessment
Uncontrolled terms:DDT contamination - Dichlorodiphenyltrichloroethane - Hong-kong - Human health risk assessment - Living environment - Persistent organic pollutant (POP) - Polychlorinated biphenyl (PCBs) - Source diagnostics
Classification code:461.6  Medicine and Pharmacology - 461.7  Health Care - 471  Marine Science and Oceanography - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201707151

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 15>

Accession number:20183805835576
Title:Air Pollutant Emission Inventory from Iron and Steel Industry in the Beijing-Tianjin-Hebei Region and Its Impact on PM<inf>2.5</inf>
Title of translation:&#20140;&#27941;&#20864;&#22320;&#21306;&#38050;&#38081;&#34892;&#19994;&#27745;&#26579;&#29289;&#25490;&#25918;&#28165;&#21333;&#21450;&#23545;PM<inf>2.5</inf>&#24433;&#21709;
Authors:Duan, Wen-Jiao (1); Lang, Jian-Lei (1); Cheng, Shui-Yuan (1); Jia, Jia (1); Wang, Xiao-Qi (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:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1445-1454
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The iron and steel industry, which discharges a large amount of pollutants including SO<inf>2</inf>, NO<inf>x</inf>, and PM<inf>2.5</inf>, is the main source of atmospheric pollution in the Beijing-Tianjin-Hebei region. Based on the bottom-up method, a high temporal and spatial resolution emission inventory of the iron and steel industry in the Beijing-Tianjin-Hebei region was developed, which took into account the multiple air pollutants released during coking, sintering, pelletizing, ironmaking, steelmaking, and the steel rolling process. As the emission inventory showed, the total emissions of SO<inf>2</inf>, NO<inf>x</inf>, TSP, PM<inf>10</inf>, PM<inf>2.5</inf>, CO, and VOC from the iron and steel industry in the Beijing-Tianjin-Hebei region in 2015 were 388.2, 272.3, 791.9, 531.5, 386.8, 8233.8, and 265.3 kilotons, respectively, among which, sintering and pelletizing were the two processes discharging the most pollutants (17.0%-72.0%), followed by the ironmaking process (4.6%-42.4%) and the steel rolling process (3.5%-35.7%); the iron and steel industry in Tangshan discharged the most pollutants (39.1%-63.5%) among those in all the 13 cities. The impact of the iron and steel industry on the regional PM<inf>2.5</inf> concentration was simulated by a two-layer nested meteorology-air quality coupling model system (WRF-CMAx) with Particulate Source Apportionment Technology (PSAT). The simulation results showed that the iron and steel industry contributed 14.0%, 15.9%, 12.3%, and 8.7% of the PM<inf>2.5</inf> concentrations of the Beijing-Tianjin-Hebei region in spring, summer, autumn, and winter, respectively, and that the iron and steel industry had the most significant impact on the PM<inf>2.5</inf> concentrations in Tangshan among all the 13 cities, with a contribution rate up to 41.2%, followed by those in Qinhuangdao, Shijiazhuang, and Handan, with contributions of 19.3%, 15.3%, and 15.1%, respectively. The iron and steel industry has an important impact on the PM<inf>2.5</inf> concentration of the Beijing-Tianjin-Hebei region to which the government should pay more attention, and take more effective control measures to address this problem.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Iron and steel industry
Controlled terms:Air quality - Nitrogen oxides - Particles (particulate matter) - Pelletizing - Sintering - Steelmaking
Uncontrolled terms:Air pollutant emission - Atmospheric pollution - Beijing-tianjin-hebei regions - Emission characteristics - Emission inventories - PM2.5 - Temporal and spatial - WRF-CAMx
Classification code:451.2  Air Pollution Control - 545  Iron and Steel - 545.3  Steel - 804.2  Inorganic Compounds - 951  Materials Science
Numerical data indexing:Percentage 1.23e+01%, Percentage 1.40e+01%, Percentage 1.51e+01%, Percentage 1.53e+01%, Percentage 1.59e+01%, Percentage 1.70e+01% to 7.20e+01%, Percentage 1.93e+01%, Percentage 3.50e+00% to 3.57e+01%, Percentage 3.91e+01% to 6.35e+01%, Percentage 4.12e+01%, Percentage 4.60e+00% to 4.24e+01%, Percentage 8.70e+00%
DOI:10.13227/j.hjkx.201709053

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 16>

Accession number:20183805835618
Title:Effects of the Farmland-to-Forest/Grassland Conversion Program on the Soil Bacterial Community in the Loess Hilly Region
Title of translation:&#40644;&#22303;&#19992;&#38517;&#21306;&#36864;&#32789;&#36824;&#26519;&#36824;&#33609;&#23545;&#22303;&#22756;&#32454;&#33740;&#32676;&#33853;&#32467;&#26500;&#30340;&#24433;&#21709;
Authors:Chen, Meng-Li (1); Zeng, Quan-Chao (1); Huang, Yi-Mei (1); Ni, Yin-Xia (1) 
Author affiliation:(1) Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China 
Corresponding author:Huang, Yi-Mei(ymhuang1971@nwsuaf.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1824-1832
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study investigated the effects of the program aimed at converting farmland into forest or grassland on the soil bacterial diversity in the Loess Hilly region. Corn land was selected as the experimental control, and Caragana intermedia land and Stipa bungeana land were selected as the experimental lands. Soil from three different land use types were selected as subjects. The soil bacterial communities were analyzed using a high throughput sequencing technique (MiSeq). The sequence region was 16S rRNA V3-V4 variable region. The &alpha; diversity, community composition, and relative abundances of the soil bacterial groups were analyzed, in order to explore the effects of soil physical and chemical properties on the bacterial community structure. The results showed that the structure and diversity of the microbial communities differed under the different land use types. At the phylum level, the dominant phyla were Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, Gemmatimonadetes, and Firmicutes. At the class level, &alpha;-Proteobacteria, Actinobacteria, Acidobacteria, &beta;-Proteobacteria, Thermoleophilia, Gemmatimonadetes, Bacilli, and &delta;-Proteobacteria were predominant. Compared to the corn land, Proteobacteria and Actinobacteria were the dominant bacteria in the Caragana intermedia land, while Actinobacteria and Acidobacteria were the dominant bacteria in the Stipa bungeana land. Soil bacterial diversity was the highest in the shrub land. RDA analysis revealed that soil organic matters and total nitrogen were the most influential environmental factors. It was shown thus that the program of converting farmland into forest or grassland has significantly improved the soil fertility and environmental conditions, and the composition of the soil bacterial community has also been appreciably changed.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Soils
Controlled terms:Bacteria - Chemical analysis - Farms - Forestry - Land use - RNA - Sediments - Throughput
Uncontrolled terms:Community structures - Converting farmland into forest or grassland - High-throughput sequencing - Loess hilly regions - Soil bacterium
Classification code:403  Urban and Regional Planning and Development - 461.2  Biological Materials and Tissue Engineering - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.13227/j.hjkx.201708090

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 17>

Accession number:20183805835367
Title:Effects of Seasonal Asymmetric Warming on Soil CO<inf>2</inf> Release in Karst Region
Title of translation:&#23395;&#33410;&#38750;&#23545;&#31216;&#21319;&#28201;&#23545;&#21888;&#26031;&#29305;&#22303;&#22756;CO<inf>2</inf>&#37322;&#25918;&#30340;&#24433;&#21709;
Authors:Tang, Guo-Yong (1); Zhang, Chun-Hua (1); Liu, Fang-Yan (1); Li, Kun (1); Ma, Yan (1) 
Author affiliation:(1) Research Institute of Resource Insects, Chinese Academy of Forestry, Kunming; 650224, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1962-1970
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Seasonal asymmetric warming is one of the distinguishing features of global warming. However, if this feature is not considered in studying the effects of global changes on terrestrial ecosystems, it might probably cause misunderstanding of these studies. The releasing features of soil CO<inf>2</inf> in Karst regions under various warming scenarios were simulated following a four-year continuous warming period using infrared radiators. A total of six treatments was arranged: no warming (ambient temp, CK); symmetric warming (ambient plus 2.0&#8451; full year, SW); and, lowly, moderately, highly, and extremely asymmetric warming (ambient plus 2.5&#8451;/1.5&#8451;, 3.0&#8451;/1.0&#8451;, 3.5&#8451;/0.5&#8451;, and 4.0&#8451;/0&#8451; in the winter-spring/summer-autumn seasons, respectively, LAW, MAW, HAW, and EAW). The results showed that compared to CK, soil CO<inf>2</inf> efflux in all the warming plots significantly increased by 0.26 &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>, or 17.41%. In the winter-spring seasons, soil CO<inf>2</inf> efflux in the warming treatments increased by 0.23 &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>. The Q<inf>10</inf> values ranged from 1.53 to 3.24 with an average of 2.23 under the scenario of warming up by 2.0&#8451;. The warming-induced contribution of CO<inf>2</inf> efflux in the summer-autumn seasons (80%) was obviously higher than that in the winter-spring seasons (20%) in the SW treatment, whereas the mean contribution in the summer-autumn seasons (46%) was closer to that in the winter-spring seasons (54%) in the asymmetric warming treatments. Both soil CO<inf>2</inf> efflux and Q<inf>10</inf> showed a tendency towards decrease with the increase in the asymmetry of warming under the five warming scenarios. The soil CO<inf>2</inf> efflux in the SW treatment was significantly (P&lt;0.05) higher than those in the MAW, HAW, and EAW treatments. The Q<inf>10</inf> values in the summer-autumn seasons was larger than those in the winter-spring seasons under each warming treatment or across all warming treatments, which was probably related to soil water content, soil microbe, dissolved inorganic carbon, and vegetation growth. The results revealed that it may potentially overestimate the effects of global warming on soil CO<inf>2</inf> releasing subject to symmetric warming.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Carbon dioxide
Controlled terms:Global warming - Landforms - Soil moisture
Uncontrolled terms:Asymmetric warming - CO2 efflux - Karst - Symmetric warming - Temperature coefficient
Classification code:443.1  Atmospheric Properties - 481.1  Geology - 483.1  Soils and Soil Mechanics - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.74e+01%, Percentage 2.00e+01%, Percentage 4.60e+01%, Percentage 5.40e+01%, Percentage 8.00e+01%
DOI:10.13227/j.hjkx.201709021

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 18>

Accession number:20183805835608
Title:Effect of Temperature on the Performance and Microbial Community Structure in an Integrated Anaerobic Fluidized-bed Membrane Bioreactor Treating Benzothiazole Wastewater
Title of translation:&#28201;&#24230;&#23545;&#19968;&#20307;&#24335;&#21388;&#27687;&#27969;&#21270;&#24202;&#33180;&#29983;&#29289;&#21453;&#24212;&#22120;&#36816;&#34892;&#25928;&#33021;&#21450;&#24494;&#29983;&#29289;&#32676;&#33853;&#32467;&#26500;&#30340;&#24433;&#21709;
Authors:Li, Yue (1); Hu, Qi (2); Gao, Da-Wen (1) 
Author affiliation:(1) State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin; 150090, China; (2) School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang; 110016, China 
Corresponding author:Gao, Da-Wen(gaodw@hit.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1731-1738
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:An integrated anaerobic fluidized-bed membrane bioreactor (IAFMBR) was applied to treat synthetic high-strength benzothiazole wastewater. This study investigated the effect of temperature on the performance, membrane fouling and microbial community structure of IAFMBR. The results showed that decreasing temperature had an adverse effect on the performance and the cycle of membrane fouling. When temperature declined from 35&#8451; to 15&#8451;, the COD efficiency dropped 7.4%, benzothiazole removal efficiency dropped 49.2%, the accumulation of total VFAs increased 225.66 mg&bull;L<sup>-1</sup>, and methane yield (in CH<inf>4</inf>/COD<inf>removed</inf>) dropped 0.118 m<sup>3</sup>&bull;kg<sup>-1</sup>. The membrane fouling cycle shortened from 5.2 d to 2.5 d. For cake layer, the concentration of soluble microbial product (SMP ) increased from 42.47 mg&bull;L<sup>-1</sup> to 70.62 mg&bull;L<sup>-1</sup>, and the extracellular polymeric substance (EPS ) content (in VSS) increased from 46.30 mg&bull;g<sup>-1</sup> to 82.22 mg&bull;g<sup>-1</sup>when the TMP was 15 kPa. For mixed liquor, the concentration of SMP increased from 36.46 mg&bull;L<sup>-1</sup> to 69.35 mg&bull;L<sup>-1</sup> and the EPS content increased from 47.47 mg&bull;g<sup>-1</sup>to 81.63 mg&bull;g<sup>-1</sup>. Protein was the main component of EPS and SMP, and occurred in proportion of 80%.The microbial community structure showed that the dominant phyla were Firmicutes and Chloroflexi, which accounted for 42.6%-61.0% of the total relative abundance. The genera Clostridium (13.7%), Levilinea (15.2%), and Lactococus (17.9%) dominated with decreasing temperatures. The dominant methanogen was Methanosaeta.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Fluidized beds
Controlled terms:Bioconversion - Bioreactors - Efficiency - Membrane fouling - Membranes - Microorganisms - Temperature - Wastewater treatment
Uncontrolled terms:Anaerobic fluidized bed - Benzothiazoles - Effect of temperature - Extracellular polymeric substances - Membrane bioreactor - Microbial community structures - Removal efficiencies - Soluble microbial products
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461.8  Biotechnology - 461.9  Biology - 641.1  Thermodynamics - 801.2  Biochemistry - 913.1  Production Engineering - 951  Materials Science
Numerical data indexing:Mass_Density 2.26e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 3.65e-02kg/m3 to 6.93e-02kg/m3, Mass_Density 4.25e-02kg/m3 to 7.06e-02kg/m3, Percentage 1.37e+01%, Percentage 1.52e+01%, Percentage 1.79e+01%, Percentage 4.26e+01% to 6.10e+01%, Percentage 4.92e+01%, Percentage 7.40e+00%, Percentage 8.00e+01%, Pressure 1.50e+04Pa, Specific_Volume 1.18e-01m3/kg
DOI:10.13227/j.hjkx.201707261

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 19>

Accession number:20183805835579
Title:Vertical Distributional Characteristics of Inorganic Ions of PM<inf>2.5</inf> at Mt. Huashan, Inland China
Title of translation:&#21326;&#23665;&#22320;&#21306;PM<inf>2.5</inf>&#20013;&#26080;&#26426;&#31163;&#23376;&#22402;&#30452;&#20998;&#24067;&#29305;&#24449;
Authors:Cao, Cong (1, 2); Wang, Ge-Hui (1); Wu, Can (1, 2); Li, Jian-Jun (1); Liu, Lang (1, 2); Li, Jin (1, 2); Yu, Xing (3) 
Author affiliation:(1) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Meteorological Institute of Shaanxi Province, Xi'an; 710014, China 
Corresponding author:Wang, Ge-Hui(wanggh@ieecas.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1473-1483
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:PM<inf>2.5</inf> was simultaneously collected using a high-volume sampler at 4 h intervals from the mountainside and the foot of the mountain in the Mt. Huashan region, inland China, during the summer of 2016, and the samples were analyzed for inorganic ions, to investigate the chemical characteristics and vertical distribution of the fine particles in the region. The results showed that the concentrations of PM<inf>2.5</inf> were (46.9&plusmn;38.2) &mu;g&bull;m<sup>-3</sup> and (76.0&plusmn;44.3) &mu;g&bull;m<sup>-3</sup> on the mountainside and at the foot of Mt. Huashan, respectively. The concentrations of inorganic ions in PM<inf>2.5</inf> was higher at the foot of the mountain than on the mountainside, with the order of the mass concentrations of the major ionic species being SO<inf>4</inf><sup>2-</sup>&gt;NO<inf>3</inf><sup>-</sup>&gt;NH<inf>4</inf><sup>+</sup>&gt;Ca<sup>2+</sup>. Among all the inorganic ions, SO<inf>4</inf><sup>2-</sup>, NO<inf>3</inf><sup>-</sup>, and NH<inf>4</inf><sup>+</sup>are the dominant species, accounting for 89% and 85% of the total, on the mountainside and at the foot, respectively. The fine particulate NH<inf>4</inf><sup>+</sup> existed mostly in the forms of (NH<inf>4</inf>)<inf>2</inf>SO<inf>4</inf> and NH<inf>4</inf>NO<inf>3</inf> on the mountainside, and in the forms of NH<inf>4</inf>HSO<inf>4</inf> and NH<inf>4</inf>NO<inf>3</inf> at the foot of the mountain. Mass concentrations of PM<inf>2.5</inf> and its major components on the mountainside showed clear diurnal variations, with maximums between 12:00-16:00, mainly due to the transport of the pollutants from the ground surface by the planetary boundary layer height variation and the valley breeze. In contrast, the diurnal variations of PM<inf>2.5</inf>and its major components at the foot are characterized with two maxima, peaking between 08:00-12:00 in the daytime and 00:00-04:00 in the nighttime, respectively, mainly due to the increased emissions from both the morning rush-hour traffic and the nighttime on-road heavy-duty vehicles. Acidity of the fine particles was estimated by using the equivalent ratio of anions to cations and the thermodynamic equilibrium model ISORROPIA &#8545;. Both methods showed that the acidity of PM<inf>2.5</inf> at the ground surface site is stronger than that on the mountainside in the Mt. Huashan region.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:45
Main heading:Particles (particulate matter)
Controlled terms:Acidity - Boundary layer flow - Boundary layers - Chemical analysis - Ions - Landforms - Nitrogen compounds
Uncontrolled terms:Chemical characteristic - High-volume sampler - Mt. Huashan - Planetary boundary layers - PM2.5 - Thermodynamic equilibrium model - Vertical distributions - Water soluble inorganic ions
Classification code:481.1  Geology - 631.1  Fluid Flow, General - 801.1  Chemistry, General - 951  Materials Science
Numerical data indexing:Percentage 8.50e+01%, Percentage 8.90e+01%, Time 1.44e+04s
DOI:10.13227/j.hjkx.201708039

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 20>

Accession number:20183805835363
Title:Effect of Ca-bentonite on Cu and Zn Forms in Compost and Soil, and Their Absorption by Chinese Cabbage
Title of translation:&#38041;&#22522;&#33192;&#28070;&#22303;&#36741;&#21161;&#23545;&#22534;&#32933;&#21450;&#22303;&#22756; Cu, Zn&#24418;&#24577;&#36716;&#21270;&#21644;&#30333;&#33756;&#21560;&#25910;&#30340;&#24433;&#21709;
Authors:Zhao, Jun-Chao (1); Wang, Quan (1); Ren, Xiu-Na (1); Li, Rong-Hua (1); Awasthi, Mukesh Kumar (1); Lahori, Altaf Hussain (1); Zhang, Zeng-Qiang (1) 
Author affiliation:(1) College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China 
Corresponding author:Zhang, Zeng-Qiang(zhangzq58@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1926-1933
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Aerobic composting was conducted to evaluate the effects of the different ratios (0%, 2.5%, 5%, 7.5%, and 10%) of Ca-bentonite (CB) on the speciation of Cu and Zn during pig manure composting, while pot experiment was performed to investigate the role of CB-added compost on the bio-availability of Cu and Zn to Chinese cabbage and its biomass. The results showed that the exchangeable fractions of Cu and Zn decreased, while their oxidized and residual fractions gradually increased during composting; CB addition reduced the distribution ratios of bio-available Cu and Zn in mature compost by approximately 19.84%-48.90% and 4.94%-16.39%, compared to those in the 0% CB-added treatment, and the best result was found in the 10% CB-added treatment.. Meanwhile, the pot experiment confirmed that the addition of compost considerably increased soil organic matter (OM) and electrical conductivity (EC) but decreased soil pH value. On the contrary, the application of CB effectively decreased EC and increased soil pH but inhibited OM mineralization in soil as compared to non-amended treatment. While addition of compost significantly increased plant dry biomass as compared to that with soil alone, maximum biomass was obtained [(6.51&plusmn;0.34) g&bull;pot<sup>-1</sup>] in 10% CB-added compost. After the application of CB-added compost, the contents of the bio-available factions of Cu in the harvested soil increased, while the contents of the exchangeable fractions of Zn decreased by 38.91%, 43.69%, 46.02%, 45.12%, and 54.65%, respectively. The absorption of Cu and Zn by Chinese cabbage was considerably reduced after the application of compost, while the uptake of Zn in the plant declined as the CB rates increased, and the absorption of Cu increased. The study indicated that 10% CB addition could significantly reduce the bioavailability of Cu and Zn in compost, and also showed a continuous effect on restricting the bioavailability of Zn after land utilization. Meanwhile CB amendment enhanced Chinese cabbage biomass and reduced the uptake of Zn.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Zinc
Controlled terms:Bentonite - Biochemistry - Biomass - Calcium compounds - Composting - Copper - Fertilizers - Forming - Manures - Soils
Uncontrolled terms:Aerobic composting - Ca-bentonite - Distribution ratio - Electrical conductivity - Exchangeable fraction - Land utilization - Residual fraction - Soil organic matters
Classification code:482.2  Minerals - 483.1  Soils and Soil Mechanics - 544.1  Copper - 546.3  Zinc and Alloys - 801.2  Biochemistry - 804  Chemical Products Generally - 821.5  Agricultural Wastes
Numerical data indexing:Percentage 0.00e+00%, Percentage 1.00e+01%, Percentage 1.98e+01% to 4.89e+01%, Percentage 2.50e+00%, Percentage 3.89e+01%, Percentage 4.37e+01%, Percentage 4.51e+01%, Percentage 4.60e+01%, Percentage 4.94e+00% to 1.64e+01%, Percentage 5.00e+00%, Percentage 5.46e+01%, Percentage 7.50e+00%
DOI:10.13227/j.hjkx.201706071

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 21>

Accession number:20183805835602
Title:Characteristics and Performance of Embedded ANAMMOX Bacteria in Treating Saline Wastewater
Title of translation:&#28023;&#27700;&#20248;&#21270;ANAMMOX&#21253;&#22475;&#22266;&#23450;&#21270;&#21450;&#20854;&#22788;&#29702;&#21547;&#28023;&#27700;&#27745;&#27700;&#30340;&#33073;&#27694;&#24615;&#33021;
Authors:Shan, Xiao-Jing (1); Yu, De-Shuang (1); Li, Jin (1); Chen, Guang-Hui (1); Feng, Li (1); L&uuml;, Ting-Ting (1); Shao, Qing (1) 
Author affiliation:(1) School of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China 
Corresponding author:Li, Jin(ljin0532@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1677-1687
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to improve the mechanical stability of the material, the embedded raw material combination was studied in the experiment, and seawater was added to optimize the performance of the material. The results indicated that the optimal material ratio was polyvinyl alcohol (PVA 125 g&bull;L<sup>-1</sup>)-alginate sodium (SA 20 g&bull;L<sup>-1</sup>)-activated carbon (40 g&bull;L<sup>-1</sup>). The curing time was 18 h. After adding seawater, the beads were found to have larger pore sizes inside, and the pores were distributed unevenly because of the Hofmeister effect. At the same time, the mechanical stability and biological capacity were found to be significantly higher than those of the fresh water group. The Raman spectra analysis showed that the addition of seawater made the-OH on PVA have greater crosslinking reactions with the crosslinker. The activated sludge was used to treat wastewater containing sea water, and after an operation of 21 d, the removal rate of NH<inf>4</inf><sup>+</sup>-N was about 90%, and the stoichiometric ratio of &Delta;NH<inf>4</inf><sup>+</sup>-N:&Delta;NO<inf>2</inf><sup>-</sup>-N:&Delta;NO<inf>3</inf><sup>-</sup>-N was stable at 1:(1.04&plusmn;0.1):(0.17&plusmn;0.02). From the 21st day to the 46th day, the reactor was run in a steady state. When the nitrogen load rate doubled, the ammonia nitrogen removal rate and stoichiometry had little variations. The total nitrogen removal rate was about 85%, and the total nitrogen removal load rate was 0.2 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:40
Main heading:Nitrogen removal
Controlled terms:Activated carbon - Ammonia - Crosslinking - Mechanical stability - Pore size - Radioactive waste vitrification - Seawater effects - Wastewater treatment - Water treatment
Uncontrolled terms:Ammonia nitrogen removal - ANAMMOX - Biological capacity - Crosslinking reaction - Hofmeister effects - Material combination - Stoichiometric ratio - Total nitrogen removal
Classification code:445.1  Water Treatment Techniques - 452.4  Industrial Wastes Treatment and Disposal - 471.4  Seawater, Tides and Waves - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 951  Materials Science
Numerical data indexing:Mass_Density 1.25e+02kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e+01kg/m3 to 2.20e-02kg/m3, Mass_Density 4.00e+01kg/m3 to 2.20e-02kg/m3, Percentage 8.50e+01%, Percentage 9.00e+01%, Time 6.48e+04s
DOI:10.13227/j.hjkx.201706159

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 22>

Accession number:20183805835623
Title:Pollution Characteristics of PAHs in Soil from a Remote Mountain Wetland-Dajiuhu Lake, Shengnongjia
Title of translation:&#20559;&#36828;&#39640;&#23665;&#28287;&#22320;&#22303;&#22756;&#20013;PAHs&#27745;&#26579;&#29305;&#24449;:&#20197;&#31070;&#20892;&#26550;&#22823;&#20061;&#28246;&#20026;&#20363;
Authors:Hu, Tian-Peng (1, 2); Xing, Xin-Li (1); Ke, Yan-Ping (1); Mao, Yao (1); Li, Ying (1); Zheng, Huang (1); Yu, Yue (1); Zhang, Jia-Quan (2); Qi, Shi-Hua (1) 
Author affiliation:(1) Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation, School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi; 435003, China 
Corresponding author:Xing, Xin-Li(xingxinli5300225@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1872-1879
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Ten sampling points were distributed approximately equidistantly in the Dajiuhu lake wetland, and soils from the depths 0-10 cm, 10-20 cm, and 20-30 cm were collected in April 2012. Gas chromatography-mass spectrometry (GC-MS) was used to analyze the remote mountain wetland shallow soils, and 16 kinds of USEPA priority controlled polycyclic aromatic hydrocarbon (PAH) pollutants were identified. The &sum;<inf>16</inf>PAHs content ranges of the shallow soils of this region were 48.55-984.73 ng&bull;g<sup>-1</sup>, 14.36-806.47 ng&bull;g<sup>-1</sup>, and 12.84-1191.53 ng&bull;g<sup>-1</sup> in the 0-10 cm, 10-20 cm, and 20-30 cm layers, with a mean of 302.94 ng&bull;g<sup>-1</sup>, 142.98 ng&bull;g<sup>-1</sup>, and 208.68 ng&bull;g<sup>-1</sup> in the three layers, respectively. The concentrations of seven carcinogenic PAHs ranged from 21.20-844.29 ng&bull;g<sup>-1</sup>, 2.96-592.06 ng&bull;g<sup>-1</sup> and 0.66-964.70 ng&bull;g<sup>-1</sup>in the three soil layers, with means of 197.25 ng&bull;g<sup>-1</sup>, 93.16 ng&bull;g<sup>-1</sup>, and 147.16 ng&bull;g<sup>-1</sup> that accounted for 65.12%, 65.13%, and 69.08% of the total PAHs in the three soil layers, respectively. The concentrations of PAHs in the areas with peat were significantly higher than that in the soil. PAHs having 4-6 rings were the dominant ones. The ratios IcdP/(IcdP+BghiP) and Pyr/BaP showed that the PAHs in the shallow soil form the Dajiuhu lake wetland mainly came from burning fossil fuels and wood. In recent years, the entry of tourist vehicles has contributed significantly to the increase in PAHs. The regression analysis on peat surface layer single body PAH and total PAHs showed that Chr, BbF, IcdP, and BaA could be used as a signaling property of mountain wetland PAH pollution.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Soil pollution
Controlled terms:Gas chromatography - Lake pollution - Lakes - Mass spectrometry - Peat - Polycyclic aromatic hydrocarbons - Regression analysis - Soils - Wetlands - Wood fuels
Uncontrolled terms:Carcinogenic PAHs - Composition characteristics - Gas chromatography-mass spectrometries (GC-MS) - Polycyclic aromatic hydrocarbon (PAH) - Sampling points - Source apportionment - Surface layers - Tourist vehicle
Classification code:453  Water Pollution - 483.1  Soils and Soil Mechanics - 524  Solid Fuels - 801  Chemistry - 802.3  Chemical Operations - 804.1  Organic Compounds - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 6.51e+01%, Percentage 6.91e+01%, Size 0.00e+00m to 1.00e-01m, Size 1.00e-01m to 2.00e-01m, Size 2.00e-01m to 3.00e-01m
DOI:10.13227/j.hjkx.201707218

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 23>

Accession number:20183805835605
Title:Effect of Step Feed on Denitrifying Phosphorus and Nitrate Removal in a Modification of the Two Sludge A<sup>2</sup>/O-BAF System
Title of translation:&#20998;&#27573;&#36827;&#27700;&#23545;&#25913;&#33391;A<sup>2</sup>/O-BAF&#21452;&#27745;&#27877;&#31995;&#32479;&#21453;&#30813;&#21270;&#38500;&#30967;&#33073;&#27694;&#30340;&#24433;&#21709;
Authors:Nan, Yan-Bin (1); Peng, Yong-Zhen (2); Zeng, Li-Yun (1); Zhao, Zhi-Chao (1); Liu, Hong (1); Li, Hui (1); Chen, Yong-Zhi (1) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, Beijing University of Technology, Beijing; 100124, China 
Corresponding author:Chen, Yong-Zhi(476411589@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1704-1712
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A modification of the two sludge A<sup>2</sup>/O-BAF system was used to treat low C/N real domestic sewage. In order to improve the utilization of the carbon source, the effects of two step feeds (pre-anoxic zone and anoxic zone) on denitrifying phosphorus and nitrate removal were studied. According to the formula of material balance for COD, the utilization of carbon source was analyzed and evaluated under different ratios of step feed, simultaneously. The results showed that when the ratio of step feed was 7:3 and the influent concentrations of COD, NH<inf>4</inf><sup>+</sup>-N, TN, and TP were 174.99, 58.19, 59.10, and 5.15 mg&bull;L<sup>-1</sup>, respectively, their effluent concentrations were 29.48, 4.07, 14.10, and 0.40 mg&bull;L<sup>-1</sup>, and the removal rates were 82.12%, 92.76%, 75.45%, and 91.20%, respectively. It was found that when the ratio of the denitrifying phosphorus accumulation organisms to the phosphorus accumulation organisms(DPAOs/PAOs) was 98.81%, the efficiencies of denitrifying phosphorus and nitrate removal were optimum. By optimizing step feed, the carbon source was utilized effectively, and the efficiencies of nitrogen and phosphorus removal were improved simultaneously. The theoretical basis has thus been provided for the modification of the two sludge A<sup>2</sup>/O-BAF system to treat low C/N waste water.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Nitrogen removal
Controlled terms:Carbon - Denitrification - Efficiency - Effluents - Nitrates - Sewage - Wastewater treatment
Uncontrolled terms:Carbon source - Low C/N - Material balance - Nitrate removal - Step-feed
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 913.1  Production Engineering
Numerical data indexing:Mass_Density 4.00e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 5.15e-03kg/m3 to 2.20e-02kg/m3, Percentage 7.55e+01%, Percentage 8.21e+01%, Percentage 9.12e+01%, Percentage 9.28e+01%, Percentage 9.88e+01%
DOI:10.13227/j.hjkx.201709261

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 24>

Accession number:20183805835360
Title:Effects of Long-term Fertilization Regimes on As Accumulation in Upland Red Earth and the Crops Growing on It
Title of translation:&#38271;&#26399;&#26045;&#32933;&#23545;&#26097;&#22320;&#32418;&#22756;&#21450;&#20316;&#29289;&#20013;&#30775;&#32047;&#31215;&#30340;&#24433;&#21709;
Authors:Zhang, Rong (1); Yu, Guang-Hui (1); Li, Ya-Qing (1) 
Author affiliation:(1) Jiangsu Key Laboratory for Organic Solid Waste Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China 
Corresponding author:Yu, Guang-Hui(yuguanghui@njau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1901-1909
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the effects of different long-term fertilization treatments on arsenic (As) accumulation in upland red earth and the crops growing on it, different fertilization treatments, including no fertilization (CK), fertilization with chemical fertilizers containing nitrogen, phosphorus and potassium (NPK), fertilization with swine manure (M), and fertilization with chemical fertilizers plus manure (NPKM), in a long-term fertilization site located in Qiyang County, Hunan Province, were selected.. The results showed that after 26 years of fertilization, both the total and available As concentrations in the soils were significantly improved in the fertilized soils (i.e., NPK, M, and NPKM) when compared to the CK soil. Meanwhile, NPK treatment had the highest As concentration (44.68 mg&bull;kg<sup>-1</sup>), which was higher than the national standard value (40 mg&bull;kg<sup>-1</sup>) in acidic soils. Fertilization practices had the biggest impacts on the non-specifically-absorbed As, followed by the residual As, and the well-crystallized hydrous oxides of Fe and Al absorbed As, but minor impacts on the amorphous and poorly-crystalline hydrous oxides of Fe and Al-absorbed As, and the specifically absorbed As. Furthermore, NPKM treatment significantly decreased the concentrations of As(&#8546;) and As(&#8548;) in the soils, when compared to the other treatments. Also, M treatment could cause the accumulation of As in the grains and straws in corn. In contrast, M treatment could not cause the accumulation of As in the grains and straws in wheat. Furthermore, correlative synchrotron-radiation-based FTIR and micro X-ray fluorescence spectromicroscopic analysis showed that As had a similar distribution pattern with clay-OH and C-OH.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:40
Main heading:Soil pollution
Controlled terms:Crops - Grain (agricultural product) - Iron - Manures - Minerals - Nitrogen fertilizers - Organic minerals - Soils - Synchrotron radiation - Synchrotrons
Uncontrolled terms:Chemical fertilizers - Distribution patterns - Long-term fertilization - Long-term fertilization experiments - Micro X-ray fluorescence - National standard - Organic fertilizers - Synchrotron radiation techniques
Classification code:482.2  Minerals - 483.1  Soils and Soil Mechanics - 545.1  Iron - 804  Chemical Products Generally - 821.4  Agricultural Products - 821.5  Agricultural Wastes - 932.1.1  Particle Accelerators
Numerical data indexing:Age 2.60e+01yr
DOI:10.13227/j.hjkx.201707038

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 25>

Accession number:20183805835590
Title:Relationship Between Landscape Pattern and Water Quality in the Ebinur Lake Region
Title of translation:&#33406;&#27604;&#28246;&#21306;&#22495;&#26223;&#35266;&#26684;&#23616;&#19982;&#27827;&#27969;&#27700;&#36136;&#20851;&#31995;&#25506;&#35752;
Authors:Cao, Can (1); Zhang, Fei (1, 2); Yalikun, Ayinigeer (1); Zhu, Shi-Dan (1, 2); Guo, Miao (1); Talifujiang, Alimire (1); Hsiangte, Kung (3) 
Author affiliation:(1) Key Laboratory of Xinjiang Wisdom City and Environment Modeling, College of Resources and Environment Science, Xinjiang University, Urumqi; 830046, China; (2) Key Laboratory of Oasis Ecology, Xinjiang University, Urumqi; 830046, China; (3) Department of Earth Sciences, University of Memphis, Memphis; 38152, United States 
Corresponding author:Zhang, Fei(zhangfei3s@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1568-1577
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To understand the effects of regional landscape patterns on water quality of rivers, we selected the Ebinur Lake area in Xinjiang as the research site. We selected and used eighteen water quality sampling points as the center, established the buffer areas based on four ranges, and extracted the land use/cover data. Firstly, the major water quality of the water collected from the Ebinar Lake area was analyzed by principal component analysis. Secondly, the effects of land use/cover on the water quality of river/lake were studied using multivariate linear analysis. Following results were obtained: &#9312; according to the six principal component analysis and eighteen surface water quality parameters collected on May 18, 2015, the coefficients were closely related. The identified water quality parameters were: total dissolved solids(TDS), SO<inf>4</inf><sup>2-</sup>, HCO<inf>3</inf><sup>-</sup>, NH<inf>4</inf><sup>+</sup>-N, Na<sup>+</sup>, and total phosphorus(TP); &#9313; according to the five landscape indices, i.e. Patch Density (PD), Largest Patch Index (LPI), Edge Density (ED), Landscape Shape Index (LSI), and Contagion Index (CONTAG) in four different ranges (100 meters, 200 meters, 300 meters, and 400 meters), human activities and their impacts were uneven in the four buffer areas; &#9314; PD, LSI, and CONTAG showed strong positive correlations with NH<inf>4</inf><sup>+</sup>-N, HCO<inf>3</inf><sup>-</sup>, and TDS, PD showed strong positive correlations with NH<inf>4</inf><sup>+</sup>-N and HCO<inf>3</inf><sup>-</sup>, while LPI showed strong positive correlation with TDS only, in the 300m buffer area.&#9315; in the 300 m buffer area, the relationships between TDS and HCO<inf>3</inf><sup>-</sup> and their respective landscape indices were quantified by multiple linear regression analysis. The relationships between the surface water quality parameters and land uses/land covers were proved to be significant.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:34
Main heading:Quality control
Controlled terms:Lakes - Land use - Linear regression - LSI circuits - Multivariant analysis - Principal component analysis - Water pollution control - Water quality
Uncontrolled terms:Ebinur lakes - Landscape pattern - Multiple linear regression analysis - Multiple linear regressions - Spatial scale - Total dissolved solids - Water quality parameters - Water quality sampling
Classification code:403  Urban and Regional Planning and Development - 445.2  Water Analysis - 453.2  Water Pollution Control - 714.2  Semiconductor Devices and Integrated Circuits - 913.3  Quality Assurance and Control - 922  Statistical Methods - 922.2  Mathematical Statistics
Numerical data indexing:Size 1.00e+02m, Size 2.00e+02m, Size 3.00e+02m, Size 4.00e+02m
DOI:10.13227/j.hjkx.201704102

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 26>

Accession number:20183805835601
Title:Adsorption of Tetracycline on Simulated Suspended Particles in Water
Title of translation:&#27700;&#20307;&#27169;&#25311;&#39063;&#31890;&#29289;&#23545;&#22235;&#29615;&#32032;&#30340;&#21560;&#38468;&#29305;&#24615;&#21450;&#22522;&#26412;&#35268;&#24459;
Authors:Xu, Long-Feng (1, 2); Wei, Qun-Shan (1, 2); L&uuml;, Qiang (1, 2); Tang, Li-Peng (1, 2); Liu, Ya-Nan (1, 2); Liu, Jian-She (1, 2) 
Author affiliation:(1) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China; (2) State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai; 201620, China 
Corresponding author:Wei, Qun-Shan(qswei@dhu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1668-1676
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The mechanism of adsorption of a typical antibiotic (tetracycline, TC) on particles in the aquatic environment and the parameters affecting adsorption were investigated. Experiments were conducted to elucidate the effects of pH and various cation species with different concentrations. The results show that the adsorption of TC on particles is rapid during the first four hours in the mixing stage. The adsorption process becomes slow after the first four hours. The adsorption of TC on particles can be described well by a Langmuir equation. The maximum adsorption of TC on particles occurs at pH 4.5, however it is reduced by strongly acidic (pH&lt;4) or alkaline (pH&gt;9) conditions. Moreover, the adsorption process is also inhibited by various cations (e.g. Na<sup>+</sup> and Ca<sup>2+</sup>) in the range of 0.000 1-0.1 mol&bull;L<sup>-1</sup> ionic concentrations. A special finding concerns Al<sup>3+</sup> ions; at a low concentration of these ions (0-0.000 1 mol&bull;L<sup>-1</sup>) the adsorption of TC on particles improves, whereas at increased concentrations the adsorption is weakened. In summary, an effective removal of the particles is critical to control TC pollution in natural waters because of the rapid adsorption of TC on particles.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Adsorption
Controlled terms:Alkalinity - Kaolin - Pollution control - Positive ions - Water pollution
Uncontrolled terms:Adsorption process - Aquatic environments - Effective removals - Ionic concentrations - Isothermal adsorption - Low concentrations - Suspended particles - Tetracycline
Classification code:453  Water Pollution - 482.2  Minerals - 801.1  Chemistry, General - 802.3  Chemical Operations
Numerical data indexing:Molar_Concentration 1.00e+03mol/m3 to 1.00e+02mol/m3
DOI:10.13227/j.hjkx.201707225

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 27>

Accession number:20183805835599
Title:Removing Typical Odorants in Drinking Water by Vacuum Ultraviolet Combined with Chlorine
Title of translation:&#30495;&#31354;&#32043;&#22806;/&#27695;&#22788;&#29702;&#39278;&#29992;&#27700;&#20856;&#22411;&#33268;&#21957;&#29289;&#36136;
Authors:Sun, Xin (1); Zhang, Yi (1); Shi, Lu-Xiao (1); Chen, Xiao-Han (1); Tang, Xiao (2) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Xi'an Jumping Water Environment Technology Co., Ltd., Xi'an; 710075, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1654-1660
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:For the effective removal of two typical odorants found in drinking water, 2-methylisoborneol (2-MIB) and geosmin (GSM), which cannot be effectively removed by the conventional water treatment processes, the advanced oxidation process of vacuum ultraviolet combined with chlorine (VUV/chlorine) was studied. The efficiency of this technology in the removal of these typical odorants was investigated; the effects of ultraviolet intensity, chlorine concentration, pH, bicarbonate concentration, and humic acid concentration on the degradation of these typical odorants were examined, and the role of hydroxyl radicals (&bull;OH) in the degradation of these typical odorants was analyzed. The purge and trap method coupled with gas chromatography and mass spectrometry (GC/MS) was used to determine the concentrations of the typical odorants. The results showed that the VUV/chlorine technology removed typical odorants effectively, and the removal rates of 2-MIB and GSM increased by 15% and 8%, respectively, in 30 minutes, compared with that by the UV/chlorine technology. With the increase in chlorine concentration and ultraviolet intensity, the degradation rates of the typical odorants was accelerated. The removal of the typical odorants was obvious under weak acid condition, and the removal rates of 2-MIB and GSM reached 95% and 96%, respectively, in 10 minutes under the condition of pH 5. Bicarbonate and humic acid competed with free radicals in the reaction system to inhibit the degradation of the typical odorants. The removal rates of 2-MIB and GSM decreased appreciably by 40% and 31%, respectively, when 1 mmol&bull;L<sup>-1</sup> tert-butanol was added to the reaction mixture, which indicated that hydroxyl radicals (&bull;OH) played a major role in the removal of these typical odorants.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Chemicals removal (water treatment)
Controlled terms:Biological materials - Degradation - Free radicals - Gas chromatography - Mass spectrometry - Odors - Organic acids - Potable water - Reaction rates
Uncontrolled terms:2-methylisoborneol - Geosmin - Hydroxyl radicals - Influence factors - VUV/chlorine
Classification code:444  Water Resources - 461.2  Biological Materials and Tissue Engineering - 801  Chemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Molar_Concentration 1.00e+00mol/m3 to 2.20e-02mol/m3, Percentage 1.50e+01%, Percentage 3.10e+01%, Percentage 4.00e+01%, Percentage 8.00e+00%, Percentage 9.50e+01%, Percentage 9.60e+01%, Time 1.80e+03s, Time 6.00e+02s
DOI:10.13227/j.hjkx.201707208

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 28>

Accession number:20183805835589
Title:Fluorescent Dissolved Organic Matter and Its Correlation with Water Quality in a Urban River: A Case Study of the Lujiang River in Beilun, Ningbo
Title of translation:&#22478;&#38215;&#21270;&#27827;&#27969;&#28342;&#35299;&#24615;&#26377;&#26426;&#36136;&#30340;&#33639;&#20809;&#29305;&#24615;&#19982;&#27700;&#36136;&#30456;&#20851;&#24615;:&#20197;&#23425;&#27874;&#24066;&#21271;&#20177;&#21306;&#33446;&#27743;&#20026;&#20363;
Authors:Cao, Chang-Li (1, 2); Liang, Meng-Qi (2, 3); He, Gui-Ying (4); Zong, Ya-Nan (2, 3); Tang, Jian-Feng (1, 2) 
Author affiliation:(1) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) Ningbo Urban Environment Observation and Research Station, Chinese Academy of Sciences, Ningbo; 315830, China; (3) College of Life Sciences, Anhui Normal University, Wuhu; 241000, China; (4) Environmental Protection Agency of Beilun, Ningbo; 315800, China 
Corresponding author:Tang, Jian-Feng(jftang@iue.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1560-1567
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Excitation-emission matrix fluorescence spectroscopy combined with fluorescence regional integration (FRI) analysis were adopted to analyze the water samples collected from the Lujiang River, which flows through the rapidly urbanizing areas of Beilun, Ningbo, in order to illuminate the composition and characteristics of the spatial distribution of fluorescent dissolved organic matter (FDOM), and further to explain its correlation with water quality in the urban river. The results showed that FDOM was composed of tyrosine-like, tryptophan-like, soluble microbial by-product-like, fulvic-like, and humic-like materials, and FDOM was dominated by protein-like components, accounting for 83.8% of the total fluorescence intensity, while humic-like components accounted for much less. The concentrations of the water quality parameters, such as total nitrogen, total phosphorus, and metals, were linearly correlated with the total fluorescence intensity of all components, indicating that FDOM was significantly related to the removal and transformation of nitrogen and phosphorus. The distribution of FDOM in different areas has the following characteristics: FDOM was low and not distinctly influenced by human activities in the upstream, while in the downstream, FDOM was high and showed the characteristics typical of that in urbanized rivers. Therefore, anthropogenic activities can greatly influence river water quality and the concentration and composition of FDOM.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Rivers
Controlled terms:Amino acids - Biogeochemistry - Dissolution - Fluorescence - Fluorescence spectroscopy - Linear transformations - Mathematical transformations - Nitrogen - Nitrogen removal - Organic compounds  - Phosphorus - Water quality
Uncontrolled terms:Dissolved organic matters - Excitation-emission matrix fluorescence spectroscopies - Excitation-emission matrix fluorescences - Fluorescence intensities - Fluorescence regional integration (FRI) - Fluorescence regional integration (FRI) analysis - Urban river - Water quality parameters
Classification code:445.2  Water Analysis - 481.2  Geochemistry - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 921.3  Mathematical Transformations
Numerical data indexing:Percentage 8.38e+01%
DOI:10.13227/j.hjkx.201707147

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 29>

Accession number:20183805835619
Title:Insight into the Mechanism of Feammox in the Surface Soils of a Riparian Zone
Title of translation:&#27827;&#23736;&#24102;&#34920;&#23618;&#22303;&#22756;&#30340;&#38081;&#27688;&#27687;&#21270;(Feammox)&#33073;&#27694;&#26426;&#21046;&#30340;&#25506;&#31350;
Authors:Ding, Bang-Jing (1); Li, Zheng-Kui (1); Zhu, Hong-Jie (1); Chen, Shi (1); Qin, Yun-Bin (1); Yang, Jian-Hua (1); Hu, You-You (1) 
Author affiliation:(1) State Key Laboratory of Pollution Control and Resources 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:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1833-1839
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Anaerobic ammonium oxidation coupled to iron (&#8546;) reduction (termed Feammox) is a recently discovered pathway of nitrogen cycling. However, little is known about the pathways of N transformation via the Feammox process in riparian zones. In this study, evidence of Feammox in the riparian zone soil layers (0-20 cm) was demonstrated using the isotope tracing technique and a high-throughput sequencing technology. The results showed that Feammox occurred in the riparian zones in four different soil layers (A:0-5 cm, B:5-10 cm, C:10-15 cm, D:15-20 cm) and the Feammox rates ranged from 0.25 mg&bull;(kg&bull;d)<sup>-1</sup> to 0.29 mg&bull;(kg&bull;d)<sup>-1</sup>. In the B soil sample, the Feammox rate was significantly higher than in the other soil samples (P&lt;0.05). In addition, iron reducing bacteria played an essential role in the Feammox process, and Anaeromyxobacter and Geobacter were detected in all the soil samples. In the B soil sample, the abundance of iron reducing bacteria was significantly higher than in the other soil samples (P&lt;0.05). Overall, the co-occurrence of ammonium oxidation and iron reduction suggest that Feammox can play an essential role in the pathway of nitrogen removal in riparian zones.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Soils
Controlled terms:Bacteria - Iron - Isotopes - Nitrogen removal - Soil surveys - Wastewater treatment
Uncontrolled terms:Ammonium oxidation - Anaerobic ammonium oxidation - Feammox - High-throughput sequencing - Iron reducing bacteria - Isotope labeling - Nitrogen cycling - Riparian zone soils
Classification code:452.4  Industrial Wastes Treatment and Disposal - 483.1  Soils and Soil Mechanics - 545.1  Iron
Numerical data indexing:Size 0.00e+00m to 2.00e-01m, Size 0.00e+00m to 5.00e-02m, Size 1.00e-01m to 1.50e-01m, Size 1.50e-01m to 2.00e-01m, Size 5.00e-02m to 1.00e-01m
DOI:10.13227/j.hjkx.201707074

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 30>

Accession number:20183805835364
Title:Effects of Short-term Exogenous Nitrogen and Carbon Input on Soil Respiration Under Changing Precipitation Pattern
Title of translation:&#22806;&#28304;&#30899;&#21644;&#27694;&#36755;&#20837;&#23545;&#38477;&#27700;&#21464;&#21270;&#19979;&#22303;&#22756;&#21628;&#21560;&#30340;&#30701;&#26399;&#24433;&#21709;
Authors:He, Yun-Long (1, 2); Qi, Yu-Chun (1); Peng, Qin (1); Dong, Yun-She (1); Guo, Shu-Fang (1, 2); Yan, Zhong-Qing (1, 2); Li, Zhao-Lin (1, 2); Wang, Li-Qin (1, 2) 
Author affiliation:(1) Key Laboratory of Land Surface Pattern and Simulation, 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 
Corresponding author:Dong, Yun-She(dongys@igsnrr.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1934-1942
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The responses of soil respiration to exogenous carbon (C) and nitrogen (N) inputs under changing precipitation patterns were explored via in-situ field experiments. In 2014, a typical temperate grassland on the Xilin River of Inner Mongolia was taken as the research site, and soil respiration was measured in the following treatments: addition of water alone (CK), addition of water + N fertilizer [CN, 2.5 g&bull;( m<sup>2</sup>&bull;a)<sup>-1</sup>], addition of water + labile C [CG, 24 g&bull;( m<sup>2</sup>&bull;a)<sup>-1</sup>], and addition of water + N fertilizer+ labile C [CNG, 2.5 g&bull;( m<sup>2</sup>&bull;a)<sup>-1</sup>+24 g&bull;( m<sup>2</sup>&bull;a) <sup>-1</sup>], and the correlations of soil respiration with soil temperature, soil moisture, soil dissolved organic C (DOC), and soil microbial biomass C (MBC) were analyzed. During the first water application event (FWE) with the frequency of natural precipitation, cumulative CO<inf>2</inf> efflux over 168 hours significantly increased in the CG and CNG treatments, whereas there was no such change in the CN treatment. In addition, soil MBC contents in the CG and CNG treatments were significantly higher than that in the CK and CN treatments, and the correlation of average soil respiration rate with soil MBC content among these treatments was positively significant (P&lt;0.05). In contrast with during the FWE, cumulative CO<inf>2</inf> efflux over 168 hours and soil MBC content significantly decreased during the second water application event (SWE) with no natural precipitation (P&lt;0.05), whereas soil DOC content significantly increased (P&lt;0.05). The cumulative CO<inf>2</inf> efflux over 168 hours significantly decreases in the CN and CG treatments (P&lt;0.05).During both the water application events, soil respiration rate had a positive relationship with soil temperature and soil volume water content (P&lt;0.05). Therefore, it is proposed that the distribution of natural precipitation influences soil water content, which controls the effects of exogenous C and N on soil respiration in semiarid grassland ecosystems.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Soil surveys
Controlled terms:Carbon - Carbon dioxide - Ecosystems - Fertilizers - Soil moisture - Temperature
Uncontrolled terms:CO2 emissions - Nitrogen deposition - Precipitation patterns - Semi-arid grasslands - Soil microbes - Soil microbial biomass c - Soil respiration rates - Temperate grasslands
Classification code:454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 641.1  Thermodynamics - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Time 6.05e+05s
DOI:10.13227/j.hjkx.201707245

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 31>

Accession number:20183805835582
Title:Emission Factors of Heavy Metals in Size-resolved Particles Emitted from Residential Coal Combustion
Title of translation:&#27665;&#29992;&#29123;&#29028;&#25490;&#25918;&#20998;&#32423;&#39063;&#31890;&#29289;&#20013;&#37325;&#37329;&#23646;&#25490;&#25918;&#22240;&#23376;
Authors:Yan, Qin (1); Kong, Shao-Fei (1, 2); Liu, Hai-Biao (1); Wang, Wei (1); Wu, Jian (2); Zheng, Ming-Ming (2); Zheng, Shu-Rui (2); Yang, Guo-Wei (2); Wu, Fang-Qi (2) 
Author affiliation:(1) Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Department of Atmospheric Sciences, School of Environmental Studies, China University of Geosciences (Wuhan), Wuhan; 430074, China 
Corresponding author:Kong, Shao-Fei(kongshaofei@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1502-1511
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on a dilution sampling system and domestic burning tests, size-segregated particles emitted from burning of three kinds of honeycomb coals (in view of flaming and smoldering burning conditions) and four kinds of raw coals, were collected by cascade impactors (FA-3). The contents of V, Cr, Mn, Co, Ni, Cu, Zn, As, Cd, Sb, and Pb were analyzed to get their emission factors (EFs) in different particle size fractions. Results indicated that:&#9312; Zn and Pb dominated the emitted mass of heavy metals from chunk (53.16%-65.76%) and honeycomb (96.08% in 0.43 &mu;m) during the flaming combustion condition. However, the emission of Ni was increased from 30.70% to 52.36% in the smoldering condition. Thus, combustion condition may affect the composition of heavy metals in particle matters. &#9313; In the flaming condition, both chunk and honeycomb emission factors of heavy metals were concentrated under 1.1 &mu;m, while the larger sized particles in the range of 5.8-10 &mu;m were distributed. So, heavy metal components may shift to the larger size of the particles at lower combustion temperatures. &#9314; Fine particle matters(PM) was divided into three categories based on the size distribution of 11 kinds of heavy metal emission factors. The maximum emission values of As and V fell under the PM size category of 5.8-10 &mu;m. The fourth cycle transition metal elements, such as Cr, Mn, Cu, Ni, and Co, fell in the range of 1.1-2.1 &mu;m and these elements represented similar emission characteristic features. Other elements, such as Pb, Sb, Cd, and Zn, were concentrated in sizes less than 0.43 &mu;m. &#9315; The additive in the honeycomb during the process may import several kinds of heavy metals and may change the combustion temperature, which remodels the mechanism of heavy metal emission. Thus, honeycomb coal may emit different heavy metals under different combustion conditions.The heavy metal emission mechanism during honeycomb coal combustion needs further investigation and the emission reduction effects (especially of heavy metals) needs to be re-estimated.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:47
Main heading:Coal combustion
Controlled terms:Coal - Emission control - Heavy metals - Honeycomb structures - Housing - Meteorological instruments - Particle size - Size distribution - Transition metals
Uncontrolled terms:Different particle sizes - Emission characteristics - Emission factors - Particle matter - Residential coal combustions - Residential coals - Size-resolved particles - Transition metal elements
Classification code:403.1  Urban Planning and Development - 408.2  Structural Members and Shapes - 443.2  Meteorological Instrumentation - 451.2  Air Pollution Control - 524  Solid Fuels - 531  Metallurgy and Metallography - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 3.07e+01% to 5.24e+01%, Percentage 5.32e+01% to 6.58e+01%, Percentage 9.61e+01%, Size 1.10e-06m, Size 1.10e-06m to 2.10e-06m, Size 4.30e-07m, Size 5.80e-06m to 1.00e-05m
DOI:10.13227/j.hjkx.201707063

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 32>

Accession number:20183805835592
Title:Dynamic Variations and Sources of Nitrate During Dry Season in the Lijiang River
Title of translation:&#28435;&#27743;&#27573;&#22320;&#34920;&#27700;&#20307;&#26097;&#23395;&#30813;&#37240;&#30416;&#21160;&#24577;&#21464;&#21270;&#29305;&#24449;&#21450;&#20854;&#26469;&#28304;
Authors:Miao, Ying (1); Zhang, Cheng (1); Xiao, Qiong (1); Zhao, Hai-Juan (1, 2); Li, Cheng-Xi (3) 
Author affiliation:(1) Ministry of Land and Resources &amp; Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Chongqing Key Laboratory of Karst Environment, School of Geographical Science, Southwest University, Chongqing; 400715, China; (3) Geological Exploration Institute of Shandong Zhengyuan, China Metallurgical Geology Bureau, Ji'nan; 250101, China 
Corresponding author:Zhang, Cheng(chzhang@karst.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1589-1597
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Dynamic variations and sources of nitrate during dry season in the Lijiang River were analyzed using the nitrate concentrations and <sup>15</sup>N and <sup>18</sup>O isotope techniques, from the samples obtained from 13 sections in the Lijiang River from September 28, 2016 to December 28, 2016. Results show that the nitrate concentrations range from 0.46 to 18.48 mg&bull;L<sup>-1</sup>, with an average of 6.18 mg&bull;L<sup>-1</sup>, and that the nitrate levels are low during the dry season. Nitrate concentrations in the Lijiang River increase slowly from September to December, mainly being influenced by rainfall, runoff, and human activity. Nitrate concentrations in the Lijiang River from upstream to downstream show a trend of "increase-decrease-increase." Nitrate in the Lijiang River during the dry season mainly originates from organic nitrogen in soil, human and animal feces, sewage (largely living sewage), human and animal waste, and tourism. In order to better protect the water quality of the Lijiang River, the urban sewage pipe network must be expanded, in addition to building small sewage treatment facilities and strengthening tourism management and environmental awareness.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:34
Main heading:Rivers
Controlled terms:Agricultural wastes - Animals - Drought - Isotopes - Nitrates - Sewage treatment - Water quality
Uncontrolled terms:Dynamic variations - Environmental awareness - Human activities - Isotope techniques - Nitrate concentration - Sewage treatment facilities - Source - Tourism management
Classification code:444  Water Resources - 445.2  Water Analysis - 452.2  Sewage Treatment - 804.2  Inorganic Compounds - 821.5  Agricultural Wastes
Numerical data indexing:Mass_Density 4.60e-04kg/m3 to 1.85e-02kg/m3, Mass_Density 6.18e-03kg/m3 to 2.20e-02kg/m3
DOI:10.13227/j.hjkx.201708140

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 33>

Accession number:20183805835616
Title:Driving Factors of the Dynamics of Microbial Community in a Dam of Copper Mine Tailings
Title of translation:&#38108;&#23614;&#30719;&#24211;&#22365;&#38754;&#22303;&#22756;&#24494;&#29983;&#29289;&#32676;&#33853;&#21160;&#24577;&#30340;&#39537;&#21160;&#22240;&#23376;
Authors:Li, Cui (1); Jing, Ju-Hui (2); Liu, Jin-Xian (2); Chai, Bao-Feng (2) 
Author affiliation:(1) Institute of Environmental Economics, Shanxi University of Finance and Economics, Taiyuan; 030006, China; (2) Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China 
Corresponding author:Chai, Bao-Feng(bfchai@sxu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1804-1812
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The relative importance of the deterministic versus stochastic processes underlying community dynamics has long been a central theme in community ecology, and is intensively debated in the field. Microbial communities play key roles in nutrient cycling and the flow of energy in ecosystems. The research on the structural dynamics of microbial community will provide data and theoretical support for understanding the assembly mechanisms of community, and for predicting the dynamics of microbial community under environmental stress. In this study, the Illumina MiSeq method was applied to investigate the structural dynamics of bacterial and fungal community in a dam of Shibahe mine tailings at different restoration stages (1-45 years). The results indicated that the soil physicochemical properties in the dam of mine tailings formed an ecological gradient, and the plant community showed succession along the restoration time. The diversity of plant communities was significantly correlated with soil nutrient contents but not with soil heavy metal contents. The structure of the microbial communities showed significant differences at different restoration stages of the dam land, in which Proteobacteria, Actinobacteria, Firmicutes, and Acidobacteria were the dominant bacterial phyla, and Ascomycota, Basidiomycota, and Zygomycota were the dominant fungal phyla. The assembly of the microbial community was shaped mainly by the soil nutrients and soil heavy metal contents, but plant diversity had no significant effect on the microbial community structure. It was suggested that edaphic factors drive the dynamics of microbial communities under the stress conditions of pH and heavy metals on small, local scales.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:44
Main heading:Ecosystems
Controlled terms:Copper mines - Dams - Digital storage - Dynamics - Fungi - Heavy metals - Microorganisms - Nutrients - Random processes - Restoration  - Soils - Stochastic systems - Structural dynamics - Tailings
Uncontrolled terms:Ecological gradients - Edaphic factors - Environmental stress - Microbial communities - Microbial community structures - Soil physico-chemical properties - Structure dynamics - Tailing dam
Classification code:408  Structural Design - 441.1  Dams - 452.3  Industrial Wastes - 454.3  Ecology and Ecosystems - 461.9  Biology - 483.1  Soils and Soil Mechanics - 504.3  Heavy Metal Mines - 531  Metallurgy and Metallography - 722.1  Data Storage, Equipment and Techniques - 922.1  Probability Theory - 961  Systems Science
Numerical data indexing:Age 1.00e+00yr to 4.50e+01yr
DOI:10.13227/j.hjkx.201707148

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 34>

Accession number:20183805835596
Title:Simulating the Fate of Typical Organochlorine Pesticides in the Multimedia Environment of the Pearl River Delta
Title of translation:&#20856;&#22411;&#26377;&#26426;&#27695;&#20892;&#33647;&#22312;&#29664;&#19977;&#35282;&#22320;&#21306;&#22810;&#20171;&#36136;&#29615;&#22659;&#20013;&#30340;&#24402;&#36235;&#27169;&#25311;
Authors:Gao, Zi-Wen (1); Xu, Yue (1); Yi, Ru-Han (1, 2, 3) 
Author affiliation:(1) School of Environment, Jinan University, Guangzhou; 510632, China; (2) Guangzhou Key Laboratory of Environmental Exposure and Health, Jinan University, Guangzhou; 510632, China; (3) Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou; 510632, China 
Corresponding author:Yi, Ru-Han(tyiruhan@jnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1628-1636
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A level &#8547; multimedia fugacity model was established to simulate the fate of p,p'-DDT and &gamma;-HCH in special climatic conditions, such as in the high temperature and humidity environment of the Pearl River Delta, China. The law of migration and transformation of p,p'-DDT and &gamma;-HCH were approached by the &#8547; multimedia fugacity model, corrected for time and temperature change during 1952-2030. The simulation results showed a better response of the variation of pollutant concentrations to the changes in the pesticide application policy; the concentrations of these two targets in air, water, soil, and sediment were found continuing to increase with the growth of application rates, and decreased with the prohibition in the use of pesticide. We predicted that concentrations will decrease to 6.1&times;10<sup>-12</sup>, 3.2&times;10<sup>-9</sup>, 6.07&times;10<sup>-7</sup>, and 8.72&times;10<sup>-7</sup> mol&bull;m<sup>-3</sup> for p,p'-DDT, and to 3.37&times;10<sup>-11</sup>, 1.14&times;10<sup>-8</sup>, 1.21&times;10<sup>-6</sup>, and 4.18&times;10<sup>-7</sup> mol&bull;m<sup>-3</sup> for &gamma;-HCH, in air, water, soil, and sediment, respectively, by 2030. The output values of the &#8547; multimedia fugacity model corrected by designating temperature as a variable parameter, was closer to the survey results than the simulation results obtained by using the model with a constant temperature parameter. The results also showed the pattern of organochlorine pesticides transformation in the whole environmental media in the study area as follow: the pollutants transferred from air to soil, air to water, soil to water, and from water to sediment, and were lastly stored in the soil and sediment. The results of sensitivity analysis indicated that the emission rate, degradation rate, temperature, and lgK<inf>ow</inf> had significant influences on the concentrations of p,p'-DDT and &gamma;-HCH in all the above-mentioned environmental medias. Uncertainty analysis showed that changes in the whole parameter sets had great impact on air concentrations. There were seasonal variations in the distribution of organochlorine pesticide concentrations, and temperature change had influence on its partition in the environment.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:River pollution
Controlled terms:Degradation - Gems - Pesticides - Rivers - Sediments - Sensitivity analysis - Soil pollution - Soils - Surveys - Uncertainty analysis  - Water treatment
Uncontrolled terms:Constant temperature - Fugacity model - Multimedia environment - Organochlorine pesticides - Pearl River delta - Pesticide applications - Pollutant concentration - Temperature changes
Classification code:445.1  Water Treatment Techniques - 453  Water Pollution - 482.2.1  Gems - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 921  Mathematics - 922.1  Probability Theory
DOI:10.13227/j.hjkx.201708154

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 35>

Accession number:20183805835593
Title:Heavy Metal Pollution of the Drinking Water Sources in the Liujiang River Basin, and Related Health Risk Assessments
Title of translation:&#26611;&#27743;&#27969;&#22495;&#39278;&#29992;&#27700;&#28304;&#22320;&#37325;&#37329;&#23646;&#27745;&#26579;&#19982;&#20581;&#24247;&#39118;&#38505;&#35780;&#20215;
Authors:Zhang, Qing-Hua (1, 2); Wei, Yong-Zhu (3); Cao, Jian-Hua (2, 4); Yu, Shi (2) 
Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Ministry of Land and Resources &amp; Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (3) Liuzhou Meteorological Bureau, Liuzhou; 545000, China; (4) International Research Center on Karst under the Auspices of UNESCO, Guilin; 541004, China 
Corresponding author:Yu, Shi(yushi@karst.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1598-1607
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The characteristics of heavy metal pollution in drinking water in the Liujiang river basin and its potential hazards on human health were investigated. In this study, the regular water-quality indices and the contents of metal elements Cd, As, Cr, Hg, Zn, Cu, Pb, Fe, and Mn in the Liujiang river and its main tributaries were detected from January to December of 2016. The health risks of drinking contaminated water were evaluated by the health risk assessment model recommended by the US EPA. The results showed that the concentrations of all of the aforementioned metal elements, except Hg, did not exceed the limits recommended by China's surface water environmental quality standard (GB 3838-2002). Pearson correlation analysis of the concentrations of metal elements indicated that Cd, Pb, As, and Fe may have similar sources, and Cu, Cr, Hg, and Zn may have source of diversity, while there was no significant correlation between the concentrations of metal elements and the pH value. The carcinogenic health risks posed by heavy metal elements in the Liujiang river basin in adults and children were 4.52E-04 a<sup>-1</sup> and 5.91E-04 a<sup>-1</sup>, respectively, while the non-carcinogenic health risks were 8.96E-09 a<sup>-1</sup> and 1.14E-08 a<sup>-1</sup>, respectively. The heavy metal elements in drinking water, on the basis of their average carcinogenic health risks, were ranked as Cr&gt;As&gt;Cd, and the risk levels ranged from 3.58E-06 to 1.21E-04 a<sup>-1</sup>; the risk values of Cr and As were higher than the maximum allowance levels recommended by ICRP (5.0&times;10<sup>-5</sup> a<sup>-1</sup>). Simultaneously, the risk levels of the average non-carcinogenic health risks ranged from 3.53E-12 to 2.87E-09 a<sup>-1</sup>, and the range was lower than the maximum allowance levels recommended by EPA. Carcinogens, especially Cr and As, are the main causes of health risks in the aquatic environment of the Liujiang river basin, and should be prioritized as the main objects of aquatic environmental risk management in the Liujiang river basin.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:River pollution
Controlled terms:Chromium - Correlation methods - Environmental Protection Agency - Health - Health hazards - Health risks - Heavy metals - Manganese removal (water treatment) - Models - Potable water  - Risk assessment - Risk management - Rivers - Water quality - Watersheds
Uncontrolled terms:Drinking water sources - Environmental quality standards - Environmental risk managements - Heavy metal pollution - Pearson correlation analysis - River basins - Water quality indexes - Water source
Classification code:444  Water Resources - 444.1  Surface Water - 445.1  Water Treatment Techniques - 445.2  Water Analysis - 453  Water Pollution - 454.2  Environmental Impact and Protection - 461.6  Medicine and Pharmacology - 461.7  Health Care - 531  Metallurgy and Metallography - 543.1  Chromium and Alloys - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201708210

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 36>

Accession number:20183805835609
Title:Removal of Antibiotics During In-situ Sludge Ozone-reduction Process
Title of translation:&#27745;&#27877;&#33261;&#27687;&#21407;&#20301;&#20943;&#37327;&#24037;&#33402;&#20013;&#25239;&#29983;&#32032;&#30340;&#21435;&#38500;
Authors:Wang, Lu (1, 2); Ben, Wei-Wei (1); Li, Yan-Gang (1); Qiang, Zhi-Min (1) 
Author affiliation:(1) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) Marine Fishery Environment and Bioremediation Laboratory, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao; 266071, China 
Corresponding author:Qiang, Zhi-Min(qiangz@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1739-1747
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Two sequencing batch reactors were established at bench-scale, with one used as an in-situ sludge ozone-reduction system and the other as a control system. Both systems were continuously operated for 90 days to comparatively investigate the elimination of nine typical antibiotics (i.e., tetracycline, oxytetracycline, doxytetracycline, norfloxacin, ofloxacin, ciprofloxacin, lomefloxacin, enrofloxacin, and azithromycin) during the in-situ sludge ozone-reduction process. Results indicated that the presence of target antibiotics in the influent (100 &mu;g&bull;L<sup>-1</sup> each) had an insignificant influence on the removal of COD, total nitrogen, ammonia, and total phosphorus by the activated sludge. The antibiotic concentrations in the effluent of the reduction system remained fairly stable over the entire operation period, and were similar to those in the effluent of the control system; however, the antibiotic concentrations in the sludge of the reduction system were obviously lower than those in the control system sludge. Mass balance calculations revealed that the input and output of target antibiotics gradually approached balance in both the systems. Ozone degradation and excess sludge discharge were the main pathways for target antibiotic removal in the reduction and the control systems, respectively. The influent antibiotics could be degraded by 83% in the sludge ozonation module of the reduction system, while 82% of the influent antibiotics were discharged with excess sludge in the control system. Therefore, the in-situ sludge ozone-reduction process could greatly reduce the release of antibiotics from the activated sludge system, which is of great importance in practice.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Activated sludge process
Controlled terms:Ammonia - Antibiotics - Batch reactors - Control systems - Nitrogen removal - Ozone - Ozonization
Uncontrolled terms:Activated sludge systems - Antibiotic concentration - Antibiotic removal - Mass-balance calculations - Oxytetracyclines (OTC) - Phosphorus recovery - Sequencing batch reactors - Sludge reduction
Classification code:452.2  Sewage Treatment - 461.6  Medicine and Pharmacology - 731.1  Control Systems - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 8.20e+01%, Percentage 8.30e+01%
DOI:10.13227/j.hjkx.201708229

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 37>

Accession number:20183805835598
Title:Chlorination of Naproxen: Removal, Transformation and Risk Assessment
Title of translation:&#33816;&#26222;&#29983;&#22312;&#27695;&#28040;&#27602;&#36807;&#31243;&#20013;&#30340;&#21435;&#38500;, &#36716;&#21270;&#19982;&#39118;&#38505;&#35780;&#20215;
Authors:Fan, Xin-Xin (1); Du, Er-Deng (1); Li, Jia-Qi (1); Zhao, Li-Li (1); Wang, Yu-Lin (1); Peng, Ming-Guo (1) 
Author affiliation:(1) School of Environmental &amp; Safety Engineering, Changzhou University, Changzhou; 213164, China 
Corresponding author:Du, Er-Deng(duerdeng@cczu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1645-1653
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The by-products produced during chlorination of pharmaceutically active compounds (PhACs) have created widespread public concern. Chlorination of a typical PhAC, naproxen (NAP), was studied. NAP chlorination parameters, intermediates identification, chlorination mechanism, and risk assessment during chlorination process have also been discussed. The results showed that NAP chlorination could fit well with the fist-order kinetics. The rate of removal and rate constants of NAP chlorination decreased with increasing initial NAP concentration and ammonium dosage, while these values increased with increasing initial free chlorine concentration. Acidic condition of the solution could significantly promote NAP chlorination. Five intermediates were identified by HPLC-MS/MS, and the mechanism of NAP chlorination was also put forward. Vibrio fischeri toxicity analysis and ESCOAR prediction indicated that higher toxicity intermediates were produced during NAP chlorination, which pose a potential threat to drinking water safety.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Chlorination
Controlled terms:Degradation - Potable water - Rate constants - Risk assessment - Toxicity
Uncontrolled terms:Acidic conditions - Chlorination process - Degradation mechanism - Intermediate product - Naproxens - Pharmaceutically active compounds - Potential threats - Vibrio fischeri
Classification code:444  Water Resources - 461.7  Health Care - 802.2  Chemical Reactions - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201707042

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 38>

Accession number:20183805835597
Title:Mechanisms and Efficiencies of Removal of PPCPs by Pilot River Water Bypass Treatment Process
Title of translation:&#27827;&#36947;&#27700;&#26049;&#36335;&#22788;&#29702;&#20013;&#35797;&#24037;&#33402;&#20013;PPCPs&#30340;&#21435;&#38500;&#25928;&#26524;&#21450;&#26426;&#21046;
Authors:Li, Li (1, 2); Zhu, Bing (2); Bai, Yao (2); Zhao, Jian (2); Cao, Zhi-Qi (2); Guo, Hong-Li (2); Li, Ling-Yun (2); Zuo, Jian-E (1) 
Author affiliation:(1) State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China; (2) Beijing Enterprises Water Group (China) Investment Limited, Beijing; 100102, China 
Corresponding author:Zuo, Jian-E(jiane.zuo@mail.tsinghua.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1637-1644
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The pharmaceuticals and personal care products (PPCPs) released into urban rivers are triggering certain ecological risks. The current study investigated the removal efficiencies of 30 frequently detected PPCPs by two river water bypass treatment processes (CS-BAF-UF-Ozone and CS-MBR-Ozone), and investigated the removal mechanism and eco-toxicological risk variation of target compounds via section-removal investigation and risk quotient model, respectively. Results indicated that both processes could efficiently remove the target PPCPs; the removal rates of tetracyclines and caffeine were&gt;90% in the biological sections, while sulfonamides, fluoroquinolones, and other pharmaceuticals could only be efficiently removed when the COD of the influent and the water temperature were comparatively higher; the ozone process had particular effect on removing these compounds. The cumulative removal rate of all PPCPs during the whole process was higher than 92.5%. The total risk quotient (RQ<inf>tot</inf>) of target PPCPs could be efficiently reduced by the bypass treatment processes; the RQ<inf>tot</inf> decreased from 12.6 in the influent river water to 0.2 in the ozone effluent, with a removal rate of 98.4%.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Water treatment
Controlled terms:Amides - Efficiency - Effluent treatment - Effluents - Ozone - Rivers - Sulfur compounds
Uncontrolled terms:Biological treatment - Ecological risks - Pharmaceuticals and personal care products - Removal efficiencies - Removal mechanism - River water - Treatment process - Water temperatures
Classification code:445.1  Water Treatment Techniques - 452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 804  Chemical Products Generally - 804.1  Organic Compounds - 913.1  Production Engineering
Numerical data indexing:Percentage 9.25e+01%, Percentage 9.84e+01%
DOI:10.13227/j.hjkx.201707092

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 39>

Accession number:20183805835365
Title:Effects of Simulated Precipitation Reduction on Soil Respiration in a Soybean-Winter Wheat Rotation Cropland
Title of translation:&#27169;&#25311;&#38477;&#27700;&#37327;&#20943;&#23569;&#23545;&#22823;&#35910;-&#20908;&#23567;&#40614;&#36718;&#20316;&#20892;&#30000;&#22303;&#22756;&#21628;&#21560;&#30340;&#24433;&#21709;
Authors:Wang, Zhao-Hui (1, 2); Chen, Shu-Tao (1, 2); Sun, Lu (1, 2); Hu, Zheng-Hua (2) 
Author affiliation:(1) Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing; 210044, China 
Corresponding author:Chen, Shu-Tao(chenstyf@aliyun.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1943-1951
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the effects of precipitation reduction on soil respiration in rainfed croplands, a field experiment was performed in a soybean-winter wheat cropland. A randomized block design including three treatments, viz. control (CK), 20% precipitation reduction (P20%), and 40% precipitation reduction (P40%), was used. Seasonal variabilities in soil respiration, soil temperature, and soil moisture were measured. Rates of soil CO<inf>2</inf> production, nitrification and denitrification, and harvested crop biomass were also measured. Results indicated that the seasonal mean soil respiration rates for CK, P20%, and P40% treatments in the soybean growing season were (4.91&plusmn;0.67), (4.19&plusmn;0.39), and (4.35&plusmn;0.32) &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>, respectively. There was no significant difference (P&gt;0.05) in the mean soil respiration rates between treatments during the soybean growing season. The seasonal mean soil respiration rates for CK, P20%, and P40% treatments during the winter wheat growing season were (2.39&plusmn;0.17), (2.03&plusmn;0.02), and (1.94&plusmn;0.05) &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>, respectively. There was a significant (P&lt;0.05) difference in the mean soil respiration rates between treatments during the winter wheat growing season. Precipitation reduction decreased the soil CO<inf>2</inf> production rates, but had no obvious impacts on soil nitrification and denitrification rates. Precipitation reduction had no significant (P&gt;0.05) effects on the root, shoot, and seed biomass of soybean, but significantly (P&lt;0.05) decreased the root, shoot, and seed biomass of winter wheat. Soil temperature was the main driver of the seasonal variation in soil respiration. Soil respiration increased exponentially with the increase in soil temperature. There was no significant (P&gt;0.05) difference in the coefficient of temperature sensitivity (Q<inf>10</inf>) between different treatments. Based on the precipitation reduction experiments of duration longer than one year in previous studies and in our present study, a significant linear regression relationship between the amount of reduced soil respiration and the amount of precipitation reduction was found, indicating that substantial precipitation reduction showed more obvious inhibition effects on soil respiration. This study also suggested that the effects of precipitation reduction on soil respiration varied between crop growing seasons, which may be attributed to the different precipitation intensities in different growing seasons.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Stream flow
Controlled terms:Biomass - Carbon dioxide - Crops - Cultivation - Denitrification - Nitrification - Soil moisture - Temperature
Uncontrolled terms:Cropland - Nitrification and denitrification - Precipitation intensity - Regression relationship - Seasonal variability - Soil respiration - Soil respiration rates - Temperature sensitivity
Classification code:407.2  Waterways - 483.1  Soils and Soil Mechanics - 641.1  Thermodynamics - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 821.3  Agricultural Methods - 821.4  Agricultural Products
Numerical data indexing:Percentage 2.00e+01%, Percentage 4.00e+01%
DOI:10.13227/j.hjkx.201709009

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 40>

Accession number:20183805835583
Title:Distribution of Oxalate in Atmospheric Aerosols and the Related Influencing Factors in Qingdao, During Winter and Spring
Title of translation:&#20908;, &#26149;&#23395;&#38738;&#23707;&#22823;&#27668;&#27668;&#28342;&#33014;&#20013;&#20057;&#20108;&#37240;&#30340;&#20998;&#24067;&#29305;&#24449;&#21450;&#24433;&#21709;&#22240;&#32032;
Authors:Zhang, Shuai (1); Shi, Jin-Hui (1, 2); Yao, Xiao-Hong (1, 2); Gao, Hui-Wang (1, 2) 
Author affiliation:(1) College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China; (2) Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao; 266100, China 
Corresponding author:Shi, Jin-Hui(engroup@ouc.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1512-1519
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A total of 119 total suspended particle (TSP) samples were collected in Qingdao from December 2012 to April 2013. Concentrations of oxalate in TSP were measured to investigate the distributional characteristics of oxalate and the related influencing factors, in winter and spring. The concentrations of oxalate in Qingdao aerosols were 31-370 ng&bull;m<sup>-3</sup> with an average of 104 ng&bull;m<sup>-3</sup> in winter, and 11-1 926 ng&bull;m<sup>-3</sup> with an average of 400 ng&bull;m<sup>-3</sup> in spring, with a significant difference between the concentrations in the two seasons. Different weather conditions affected the distribution of oxalate in aerosols. The oxalate concentration in TSP was the highest in the hazy days, followed by that in the dusty days, while this concentration in foggy days was close to that in the clear days, and the lowest concentration of oxalate appeared in the rainy days. Oxalate in Qingdao aerosols exhibited a significant positive correlation with temperature and solar radiation, suggesting that the secondary production of oxalic acid via photochemical oxidation has an important contribution to the oxalate concentrations in aerosols. The mechanisms of secondary formation of oxalate in aerosols in winter and spring are possibly different, with the aqueous phase oxidation process predominating in winter and the gas-phase oxidation-driven process predominating in spring. The results of PMF source analysis also showed that the secondary formation is the main source of oxalate in Qingdao aerosol, and its contribution to oxalate production is nearly 45% in winter and 70% in spring. The concentration of oxalate in spring aerosol was significantly higher than that in winter aerosol, the main reason of which was that temperature and solar radiation in spring were significantly higher than those in winter, promoting the secondary formation of particulate oxalate.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Oxalic acid
Controlled terms:Aerosols - Atmospheric aerosols - Oxidation - Solar radiation
Uncontrolled terms:Aqueous phase oxidations - Dicarboxylic acid - Oxalate - Photochemical oxidation - Positive correlations - Qingdao - Source analysis - Total suspended particles
Classification code:443.1  Atmospheric Properties - 657.1  Solar Energy and Phenomena - 802.2  Chemical Reactions - 804.1  Organic Compounds
Numerical data indexing:Percentage 4.50e+01%, Percentage 7.00e+01%
DOI:10.13227/j.hjkx.201707168

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 41>

Accession number:20183805835606
Title:Achieving Partial Nitritation in a Continuous-flow Aerobic Granular Sludge Reactor at Different Temperatures Through Ratio Control
Title of translation:&#19981;&#21516;&#28201;&#24230;&#19979;&#24212;&#29992;&#27604;&#20540;&#25511;&#21046;&#23454;&#29616;&#36830;&#32493;&#27969;&#22909;&#27687;&#39063;&#31890;&#27745;&#27877;&#30701;&#31243;&#30813;&#21270;
Authors:Liang, Dong-Bo (1); Bian, Wei (1); Kan, Rui-Zhe (2); Wang, Wen-Xiao (1); Zhao, Qing (1); Sun, Yi-Qi (1); Li, Jun (1) 
Author affiliation:(1) National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China; (2) City Planning Technology Service Center of Beijing, Beijing; 100045, China 
Corresponding author:Li, Jun(jglijun@bjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1713-1719
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Mature aerobic granular sludge (AGS) was inoculated in a continuous-flow reactor to treat low ammonia sewage, and the feasibility of achieving partial nitritation in a continuous-flow aerobic sludge system and the demand for R value (the ratio of dissolved oxygen and ammonia nitrogen) when partial nitritation is achieved at different temperatures (30, 20, and 10&#8451;) were investigated. The control strategy was designed to maintain a constant ratio between dissolved oxygen (DO) and ammonia nitrogen (NH<inf>4</inf><sup>+</sup>-N). The results revealed that stable nitritation in a continuous-flow aerobic sludge reactor could be achieved via ratio control, and the value of R were 0.50 (&plusmn;0.05), 0.35 (&plusmn;0.03), and 0.20 (&plusmn;0.02) at the temperatures 30, 20, and 10&#8451;, respectively, from which it can be concluded that stronger oxygen-limiting conditions were required when the temperature was lower. The experiment of fluorescence in situ hybridization (FISH) revealed that ammonia oxidizing bacteria (AOB) have a certain concentration, and the relative number of nitrite oxidizing bacteria (NOB) gradually reduced through the ratio control strategy. Based on the ratio control strategy and the characteristics of wastewater quality, full nitritation of high ammonia wastewater may be allowed; however, for low ammonia wastewater, only partial nitritation is recommended.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Quality control
Controlled terms:Ammonia - Bacteria - Biochemical oxygen demand - Dissolved oxygen - Fluorescence microscopy - Granular materials - Nitrogen - Sewage - Temperature
Uncontrolled terms:Aerobic granular sludges - Continuous flows - Low temperatures - Partial nitritation - Ratio control
Classification code:452.1  Sewage - 641.1  Thermodynamics - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 913.3  Quality Assurance and Control - 931.4  Quantum Theory; Quantum Mechanics - 951  Materials Science
DOI:10.13227/j.hjkx.201708067

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 42>

Accession number:20183805835588
Title:Effect of Air Pollution on the Cold Disease in Shanghai
Title of translation:&#19978;&#28023;&#24066;&#22823;&#27668;&#27745;&#26579;&#23545;&#24863;&#20882;&#30142;&#30149;&#30456;&#23545;&#21361;&#38505;&#24230;&#30340;&#24433;&#21709;
Authors:Yang, Si-Xu (1); Ma, Yu-Xia (1); Zhou, Jian-Ding (1); Zhou, Ji (2) 
Author affiliation:(1) College of Atmospheric Sciences, Lanzhou University, Lanzhou; 730000, China; (2) Key Laboratory of Meteorology and Health in Shanghai, Shanghai; 200030, China 
Corresponding author:Ma, Yu-Xia(mayuxia07@lzu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1552-1559
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study discusses the changes in the daily average concentrations of the main air pollutants, such as PM<inf>10</inf>, PM<inf>2.5</inf>, O<inf>3</inf>, and NO<inf>2</inf>, in Shanghai, and the effects of air pollution on cold in Shanghai. For this study, data on air pollutants, meteorological factors, and the number of daily hospital visits from cold in Shanghai were collected from January 1, 2008 to December 31, 2010. Using the time series Poisson semi-parametric generalized additive model, and controlling for the long-term trend, "week" effect, and meteorological factors by smoothing the spline function, the exposure-response relationship between air pollution and human health in Shanghai was analyzed. The study sets up the model according to age, evaluating the impact and the lag effect of air pollution on the number of daily hospital visits. Results show that when PM<inf>10</inf>, NO<inf>2</inf>, O<inf>3</inf>, and PM<inf>2.5</inf> increase by an IQR, the relative risk of cold disease is 1.024 0 (1.023 3-1.024 6), 1.020 6 (1.020 1-1.021 2), 0.939 3 (0.938 4-0.940 2), and 1.008 0 (1.006 9-1.008 6), and when PM<inf>10</inf>, NO<inf>2</inf>, O<inf>3</inf>, and PM<inf>2.5</inf> increase by 10 &mu;g&bull;m<sup>-3</sup>, the daily hospital visits increase by 0.5%, 1.0%, -2.0%, and 0.2%. In the multi-polluted model, the results of NO<inf>2</inf> and PM<inf>2.5</inf> are basically lower compared to the results of the single-pollutant model, the results of PM<inf>10</inf> and O<inf>3</inf>are higher. Air pollution in Shanghai has an impact on the incidence of cold disease.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Air pollution
Controlled terms:Hospitals - Nitrogen oxides - Particles (particulate matter) - Pollution control - Time series
Uncontrolled terms:Average concentration - Cold - Exposure-response relationships - Generalized additive model - Hospital visits - Meteorological factors - Relative risks - Spline functions
Classification code:451  Air Pollution - 462.2  Hospitals, Equipment and Supplies - 804.2  Inorganic Compounds - 922.2  Mathematical Statistics - 951  Materials Science
Numerical data indexing:Percentage -2.00e+00%, Percentage 1.00e+00%, Percentage 2.00e-01%, Percentage 5.00e-01%
DOI:10.13227/j.hjkx.201705168

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 43>

Accession number:20183805835603
Title:Enhanced Nitrogen Removal of ANAMMOX Treating Saline Wastewater With Betaine Addition
Title of translation:&#22806;&#28304;&#29980;&#33756;&#30897;&#25237;&#21152;&#22686;&#24378;&#39640;&#30416;&#24223;&#27700;&#21388;&#27687;&#27688;&#27687;&#21270;&#33073;&#27694;&#24615;&#33021;
Authors:Yu, De-Shuang (1); Wu, Guo-Dong (1); Li, Jin (1); Zhou, Tong (1); Wang, Xiao-Jing (1) 
Author affiliation:(1) School of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China 
Corresponding author:Li, Jin(ljin0532@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1688-1696
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:High salt content could result in the inhibition of microbes and affect biological treatment processes. At present, an important research topic is how to improve the efficiency of biological treatments. The anaerobic ammonia oxidation (ANAMMOX) process was used to treat high saline wastewater. Nitrogen removal performance with betaine was studied by analyzing the ANAMMOX activity, and ammonia nitrogen and nitrate nitrogen removal. The results showed that: &#9312; It has obvious improvement when betaine concentration was 0.1-0.4 mmol&bull;L<sup>-1</sup>. It alleviated the salt stress on bacteria growth inhibition of ANAMMOX, and also promoted the growth of denitrifying bacteria. When betaine concentration was 0.4-0.5 mmol&bull;L<sup>-1</sup>, denitrifying bacteria was found to have grown greatly. When betaine concentration was greater than 0.5 mmol&bull;L<sup>-1</sup>, it was unable to alleviate the salt stress inhibiting denitrification efficiency. As a result, betaine concentration of 0.8 mmol&bull;L<sup>-1</sup> completely inhibited bacteria. &#9313; When concentration of betaine was 0.3 mmol&bull;L<sup>-1</sup>, the optimal nitrogen removal efficiency was achieved. NH<inf>4</inf><sup>+</sup>-N and NO<inf>2</inf><sup>-</sup>-N increased by 16% and 32%, respectively. Nitrogen removal rate (NRR) increased by 26.8%. &#9314; At the end of the recovery experiment, with the decreasing concentrations of betaine, NH<inf>4</inf><sup>+</sup>-N was 50.6%, NO<inf>2</inf><sup>-</sup>-N was 63.7%, and NRR was 0.65 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>, so the nitrogen removal efficiency underwent fast recovery.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Nitrogen removal
Controlled terms:Ammonia - Bacteria - Betaines - Biochemical engineering - Denitrification - Efficiency - Nitrogen oxides - Salt removal - Wastewater treatment
Uncontrolled terms:Anaerobic ammonium oxidation - Biological treatment process - Denitrification efficiencies - Enhanced nitrogen removal - High saline wasterwater - Nitrogen removal efficiency - Nitrogen removal rates - Salt stresss
Classification code:452.4  Industrial Wastes Treatment and Disposal - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 805.1.1  Biochemical Engineering - 913.1  Production Engineering
Numerical data indexing:Molar_Concentration 1.00e-01mol/m3 to 4.00e-01mol/m3, Molar_Concentration 3.00e-01mol/m3 to 2.20e-02mol/m3, Molar_Concentration 4.00e-01mol/m3 to 5.00e-01mol/m3, Molar_Concentration 5.00e-01mol/m3 to 2.20e-02mol/m3, Molar_Concentration 8.00e-01mol/m3 to 2.20e-02mol/m3, Percentage 1.60e+01%, Percentage 2.68e+01%, Percentage 3.20e+01%, Percentage 5.06e+01%, Percentage 6.37e+01%
DOI:10.13227/j.hjkx.201706023

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 44>

Accession number:20183805835595
Title:Occurrence and Ecological Risk Assessment of Typical Persistent Organic Pollutants in Baiyangdian Lake
Title of translation:&#30333;&#27915;&#28096;&#20856;&#22411;&#25345;&#20037;&#24615;&#26377;&#26426;&#27745;&#26579;&#29289;&#27745;&#26579;&#29305;&#24449;&#19982;&#39118;&#38505;&#35780;&#20272;
Authors:Gao, Qiu-Sheng (1, 2, 3); Jiao, Li-Xin (2, 3); Yang, Liu (1); Tian, Zi-Qiang (2, 3, 4); Yang, Su-Wen (2, 3); An, Yue-Xia (2, 3); Jia, Hai-Bin (2, 3); Cui, Zhi-Dan (2, 3) 
Author affiliation:(1) College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing; 100083, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (4) Laboratory of Riverine Ecological Conservation and Technology, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China 
Corresponding author:Jiao, Li-Xin(287559418@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1616-1627
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A comprehensive survey of the pollution characteristics of persistent organic pollutants (POPs) in the surface water and surface sediment of Baiyangdian Lake was carried out. The survey showed that:&#9312; The concentrations of the polycyclic aromatic hydrocarbons(PAHs), organic chlorine pesticides (OCPs), and polybrominated diphenyl ethers (PBDEs) in the surface water of Baiyangdian Lake were 71.32-228.27 ng&bull;L<sup>-1</sup>, 2.62-6.13 ng&bull;L<sup>-1</sup>, and 0-6.5 ng&bull;L<sup>-1</sup>, respectively, and those in the surface sediment were 163.20-861.43 ng&bull;g<sup>-1</sup>, 2.25-6.07 ng&bull;g<sup>-1</sup>, and 230.96-1224.13 pg&bull;g<sup>-1</sup>, respectively. On comparison with historical data, the concentrations of PAHs and OCPs in both the surface water and surface sediment were found to be decreasing, while compared with the domestic and foreign lakes, the concentration of PBDEs in the surface sediment was at a low level. &#9313; The main source of PAHs, both in the surface water and surface sediment in Baiyangdian Lake, originated from fuel discharge and combustion sources. HCHs compose the main part of OCPs in both the surface water (93.76%) and surface sediment (63.10%). In the surface water body, HCHs mainly originated from the degradation of industrial HCHs; in some sites HCHs originated from atmospheric long-distance transmission and the usage of Lindane, while DDTs originated from historical residues. In surface sediment, HCHs mainly originated from the usage of new Lindane, with little industrial HCHs, and DDTs mainly originated from historical residues, while new DDTs may have been used in some sites. BDE-2 (65.80%) composed the main part of PBEDs in the surface water, and it mainly originated from atmospheric long-distance transmission and degradation of high brominated diphenyl ethers; BDE-209 (63.82%) constituted the main part of PBDEs in the surface sediment, and it mainly originated from the commercial Deca-BDEs.&#9314; Ecological Risk Assessment show that there was no obvious ecological risks in Baiyangdian Lake, but in some sites POPs may cause ecological risks; these sites should be monitored more frequently.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:61
Main heading:Organic pollutants
Controlled terms:Cyclohexane - Ethers - Insecticides - Lake pollution - Lakes - Polycyclic aromatic hydrocarbons - Risk assessment - River pollution - Surficial sediments - Surveys  - Water treatment
Uncontrolled terms:Baiyangdian lakes - Ecological risk assessment - Ecological risks - Persistent organic pollutant (POP) - Persistent organic pollutants - Polybrominated diphenyl ether (PBDEs) - Polycyclic aromatic hydrocarbons (PAHS) - Source apportionment
Classification code:445.1  Water Treatment Techniques - 453  Water Pollution - 483  Soil Mechanics and Foundations - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 6.50e-09kg/m3, Mass_Density 2.62e-09kg/m3 to 6.13e-09kg/m3, Mass_Density 7.13e-08kg/m3 to 2.28e-07kg/m3, Percentage 6.31e+01%, Percentage 6.38e+01%, Percentage 6.58e+01%, Percentage 9.38e+01%
DOI:10.13227/j.hjkx.201707190

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 45>

Accession number:20183805835361
Title:Effects of a Tribasic Amendment on Cadmium and Arsenic Accumulation and Translocation in Rice in a Field Experiment
Title of translation:&#19977;&#20803;&#22303;&#22756;&#35843;&#29702;&#21058;&#23545;&#30000;&#38388;&#27700;&#31291;&#38217;&#30775;&#32047;&#31215;&#36716;&#36816;&#30340;&#24433;&#21709;
Authors:Gu, Jiao-Feng (1, 2); Zhou, Hang (1, 2); Jia, Run-Yu (1); Wang, Qian-Qian (1); Li, Hong-Cheng (1); Zhang, Ping (1, 2); Peng, Pei-Qin (1, 2); Liao, Bo-Han (1, 2) 
Author affiliation:(1) College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China; (2) Hunan Engineering Laboratory for Control of Rice Quality and Safety, Central South University of Forestry and Technology, Changsha; 410004, China 
Corresponding author:Liao, Bo-Han(liaobh1020@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1910-1917
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:An in-situ paddy field experiment was carried out to study the influence of a tribasic amendment (QFJ, hydroxyapatite+zeolite+biochar) on Cd and As accumulation and translocation in rice grown in soil contaminated with cadmium and arsenic, with the concentrations of soil Cd and As being 3.58 mg&bull;kg<sup>-1</sup> and 124.79 mg&bull;kg<sup>-1</sup>, respectively. The results showed that, after application of QFJ, the pH, CEC, and OM contents of the rice rhizosphere soil tended to increase. The exchangeable concentrations of Cd and As were reduced from 0.37 mg&bull;kg<sup>-1</sup> and 0.07 mg&bull;kg<sup>-1</sup> to 0.12 mg&bull;kg<sup>-1</sup> and 0.04 mg&bull;kg<sup>-1</sup>, respectively. The concentrations of Cd and As in rice tissues decreased after in-situ restoration. When 9.00 t&bull;hm<sup>-2</sup> of QFJ was applied, the Cd concentration in brown rice was reduced from 0.46 to 0.18 mg&bull;kg<sup>-1</sup>, and that of inorganic As was reduced from 0.25 to 0.16 mg&bull;kg<sup>-1</sup>, both lower than 0.2 mg&bull;kg<sup>-1</sup>, meeting the requirement set by the National Food Standards (GB 2762-2012). QFJ application decreased the Cd and As bioaccumulation capacity of the roots and decreased the rice plant's capacity of Cd translocation quantity from the underground parts to the aerial parts; at same time, the Cd transferring capacity of the roots and the As transferring capacity in straw and husk were also decreased.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Soil pollution
Controlled terms:Antennas - Arsenic - Biochemistry - Cadmium - Hydroxyapatite - Soils - Zeolites
Uncontrolled terms:Accumulation - Field - Rice - Translocation - Tribasic amendment
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
DOI:10.13227/j.hjkx.201708206

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 46>

Accession number:20183805835610
Title:Effect of Zero Valent Iron on the Horizontal Gene Transfer of Tetracycline Resistance Genes During Anaerobic Sludge Digestion Process
Title of translation:&#38646;&#20215;&#38081;&#23545;&#27745;&#27877;&#21388;&#27687;&#28040;&#21270;&#36807;&#31243;&#20013;&#22235;&#29615;&#32032;&#25239;&#24615;&#22522;&#22240;&#27700;&#24179;&#36716;&#31227;&#30340;&#20316;&#29992;&#24433;&#21709;
Authors:Yang, Fan (1); Xu, Wen-Li (1); Qian, Ya-Jie (1); Liu, Zhen-Hong (1); Xue, Gang (1); Gao, Pin (1) 
Author affiliation:(1) 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:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1748-1755
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The problem of bacterial resistance has become an important issue in the area of global ecological safety and human health. Waste sludge is an important reservoir and discharge source for antibiotic resistance genes (ARGs). In this study, the quantities of seven tetracycline resistance genes (TC-ARGs), including tetA, tetC, tetG, tetM, tetO, tetW, and tetX, as well as those of class 1 integron (intI1) genes, during anaerobic sludge digestion process were comprehensively quantified by quantitative PCR (qPCR). The effects of different doses of zero valent iron (Fe<sup>0</sup>) on the decrease and increase in the quantities of TC-ARGs and intI1 genes were investigated. The influence of plasmid conjugation on the horizontal gene transfer (HGT) of the target TC-ARGs was preliminarily analyzed. The correlations between the quantities of TC-ARGs and intI1 gene have been discussed. The results showed that the quantities of TC-ARGs and intI1 genes decreased in different degrees during anaerobic sludge digestion, and the abundance of tetX gene was reduced by 2.4 orders of magnitude. When Fe<sup>0</sup> was added, no significant reduction in the quantities of TC-ARGs and intI1 genes was observed. However, as the addition of Fe<sup>0</sup> increased, the quantities of TC-ARGs and intI1 genes increased correspondingly, as compared to those in the control group. The results obtained from the quantities of TC-ARGs carried by plasmid DNA showed that plasmid conjugation probably promoted the HGT of TC-ARGs. A positive significant correlation was found between the quantities of tetG and intI1 genes, indicating that intI1 might play an important role in the evolution of tetG during sludge anaerobic digestion process.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Sludge digestion
Controlled terms:Anaerobic digestion - DNA - Gene transfer - Genes - Iron - Polymerase chain reaction
Uncontrolled terms:Anaerobic sludge digestion - Class 1 integrons - Horizontal gene transfer - Resistance genes - Zero-valent iron
Classification code:452.2  Sewage Treatment - 461.2  Biological Materials and Tissue Engineering - 461.8.1  Genetic Engineering - 545.1  Iron - 801.2  Biochemistry
DOI:10.13227/j.hjkx.201708054

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 47>

Accession number:20183705802986
Title:Differences in Cd Accumulation in Typical Soils Under the Double Rice System
Title of translation:&#20856;&#22411;&#22303;&#22756;&#21452;&#23395;&#31291;&#23545;Cd&#21560;&#25910;&#32047;&#31215;&#24046;&#24322;
Authors:Li, Xin-Yang (1); Long, Jian (1); Wang, Shu-Bing (2); Chen, Qi (1); Dong, Xia (1); Jiang, Kai (1); Hou, Hong-Bo (1); Peng, Pei-Qin (1); Liao, Bo-Han (1) 
Author affiliation:(1) College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China; (2) Agricultural Integrated Service Center of Huangxing Town, Changsha; 410100, China 
Corresponding author:Peng, Pei-Qin(pqpeng123@sina.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:406-414
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Pot experiments were used to study the differences of Cd uptake and accumulation in double-cropping rice in typical soil types. To analyze the soil availability of Cd (DTPA-Cd) in soils and the Cd accumulation in double-cropping rice at different growth stages of the rice, we conducted pot experiments that selected the yellow clayey soil (paddy soil developed from plate shaley parent materials) and the granitic sandy soil (paddy soil developed from granitic parent materials). Exogenous Cd was added with gradients of 0, 0.5, 1.0, 2.0, 5.0, and 10.0 mg&bull;kg<sup>-1</sup>. Results showed that, during the rice growth period, the available Cd in the yellow clayey soil was higher than that in the granitic sandy soil, and the difference was significant (P&lt;0.01). This showed that the content of Cd in rice (roots, shoots, leaves, rice shells, and brown rice) increased along with the treatment level and with the extension of the rice growth period. The accumulation characteristics of Cd in rice grains and other tissues of rice indicated differences between two seasons and two soil types, that is, late rice was higher in Cd than was early rice, and reddish yellow clayey soil was higher in Cd than granitic sandy soil. Significant positive linear correlations were found between the effective contents of Cd in soils and those in rice tissues (roots, shoots, leaves, and brown rice). The prediction model of Cd in rice and the characteristic equation for rice accumulation of Cd were applied to calculate the critical values of Cd: 0.98 mg&bull;kg<sup>-1</sup>for early rice and 0.83 mg&bull;kg<sup>-1</sup> for late rice in reddish yellow clayey soil, and 0.86 mg&bull;kg<sup>-1</sup>for early rice and 0.56 mg&bull;kg<sup>-1</sup> for late rice in granitic sandy soil. These threshold values are higher than the National Standards given in "farmland environmental quality evaluation standards for edible agricultural products (HJ 332-2006). " The soil security threshold values and the soil environmental capacities of the two different parent materials varied greatly; therefore, different environmental quality standards may be formulated and different measures may be needed to control Cd pollution in different parent materials.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Soil pollution
Controlled terms:Agricultural products - Bioaccumulation - Histology - Quality control - Sand - Soil pollution control - Soils - Tissue
Uncontrolled terms:Accumulation characteristics - Accumulation of Cd - Characteristic equation - Double-rice system - Environmental quality standards - Paddy soils - Security thresholds - Uptake and accumulations
Classification code:461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 483.1  Soils and Soil Mechanics - 821.4  Agricultural Products - 913.3  Quality Assurance and Control
DOI:10.13227/j.hjkx.201704220

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 48>

Accession number:20183705802957
Title:Arsenic(&#8548;) Removal by Granular Adsorbents Made from Backwashing Residuals from Biofilters for Iron and Manganese Removal
Title of translation:&#38081;&#38192;&#27877;&#38500;&#30775;&#39063;&#31890;&#21560;&#38468;&#21058;&#23545;As(&#8548;)&#30340;&#21560;&#38468;&#21435;&#38500;
Authors:Zeng, Hui-Ping (1); L&uuml;, Sai-Sai (1); Yang, Hang (2); Yin, Can (1); Cao, Rui-Hua (1); Wang, Yan-Ju (1); Li, Dong (1); Zhang, Jie (1, 2) 
Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Colloge of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China; (2) State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin; 150090, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:170-178
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Granular adsorbents for arsenic removal (GA) made from the backwashing residuals from iron and manganese removal biofilters for groundwater were characterized and examined as an arsenate sorbent. The GA were characterized by SEM-EDS microscopy, X-ray diffraction (XRD), and BET surface area measurement. The results showed that the GA had rough surfaces, developed pores, and were mainly amorphous, with small fractions of crystalline quartz and hematite. The surface area of the GA, which consists of many mesopores, was 43.8 m<sup>2</sup>&bull;g<sup>-1</sup>. The kinetic studies revealed that arsenate adsorption on the GA was described by a pseudo-second-order kinetic equation, and the Freundlich isotherm equation fit the arsenate adsorption well (R<sup>2</sup>=0.994). The maximum adsorption capacity calculated by the Langmuir isotherm equation for As(&#8548;) was 5.05 mg&bull;g<sup>-1</sup>. Further studies showed that the GA operated well for As(&#8548;) removal over a broad range in pH from 1.1 to 9.5. The coexistence of HCO<inf>3</inf><sup>-</sup> and SO<inf>4</inf><sup>2-</sup> had no great influence on arsenic adsorption, while the H<inf>2</inf>PO<inf>4</inf><sup>-</sup> and SiO<inf>3</inf><sup>2-</sup> showed negative effects. The GA can be regenerated well, and 82% of the original adsorption capacity was maintained after three regeneration cycles.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Chemicals removal (water treatment)
Controlled terms:Adsorption - Arsenic - Biofilters - Characterization - Groundwater - Hematite - Integral equations - Iron - Isotherms - Kinetic theory  - Pollution control
Uncontrolled terms:Adsorption capacities - Arsenate adsorption - Back washing - BET surface area measurement - Freundlich isotherm equations - Granular adsorbent - Pseudo second order kinetics - Regeneration cycles
Classification code:444.2  Groundwater - 482.2  Minerals - 545.1  Iron - 802.3  Chemical Operations - 804  Chemical Products Generally - 921.2  Calculus - 951  Materials Science
Numerical data indexing:Percentage 8.20e+01%, Specific_Surface_Area 4.38e+04m2/kg
DOI:10.13227/j.hjkx.201706209

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 49>

Accession number:20183705802949
Title:Organic Distribution Characteristics and Influence on Drinking Water Quality in the Typical Water Sources for Towns in the Southwest Hilly Area of China
Title of translation:&#35199;&#21335;&#19992;&#38517;&#21306;&#26449;&#38215;&#20856;&#22411;&#20379;&#27700;&#27700;&#28304;&#26377;&#26426;&#29289;&#20998;&#24067;&#29305;&#24449;&#21450;&#23545;&#39278;&#27700;&#27700;&#36136;&#30340;&#24433;&#21709;
Authors:Wang, Qiong (1); Li, Nai-Wen (1, 2); Li, Lei (3); Li, Long-Guo (1, 2); Gou, Si (1, 2); Yang, Ling-Xiao (1) 
Author affiliation:(1) College of Water Resource &amp; Hydropower, Sichuan University, Chengdu; 610065, China; (2) State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu; 610065, China; (3) Sichuan Shuyu Water Conservancy and Hydropower Engineering Design Co., Ltd., Chengdu; 610065, China 
Corresponding author:Gou, Si(359786010@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:109-116
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study analyzed the organic distribution characteristics of original and treated water and their impacts on drinking water quality using a conventional water treatment process in the typical water supply sources for towns in the southwest hilly area of China. The results showed that the water supply source in this area is micro-polluted water. Dissolved organics of low molecular weight accounted for the great majority of the organics, with the proportion ranging from 50% to 80%. There were 53 kinds and 14 classes of organics, including alkanes, esters, phenolic compounds, and benzenes, with the proportion from 80% to 90%. The amounts of organic acid, alkene, alcohols, and aldehyde were small, while the amounts of dichloromethane, phenol, and dibutyl-phthalate were relatively high. Herbicides, food additives, and antibiotics were detected, such as terbuthylazine, 2, 6-di-tert-butyl-p-cresol, and nalidixic acid. The conventional water treatment process could efficiently remove the compounds with molecular weights higher than 10&times;10<sup>3</sup> and organic acid; however, it was limited greatly in its removal of alkanes, esters, phenolic compounds, and benzenes.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Chemicals removal (water treatment)
Controlled terms:Benzene - Dichloromethane - Esters - Molecular weight - Organic acids - Paraffins - Phenols - Potable water - Water distribution systems - Water pollution  - Water quality - Water supply
Uncontrolled terms:Conventional water treatment - Distribution characteristics - Drinking source - Hilly areas - Organics
Classification code:444  Water Resources - 445.2  Water Analysis - 446.1  Water Supply Systems - 453  Water Pollution - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 931.3  Atomic and Molecular Physics
Numerical data indexing:Percentage 5.00e+01% to 8.00e+01%, Percentage 8.00e+01% to 9.00e+01%
DOI:10.13227/j.hjkx.201705246

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 50>

Accession number:20183705802945
Title:Simulation of Nitrate Isotopic (&delta;<sup>15</sup>N and &delta;<sup>18</sup>O) by Coupling the Hydrology and Transport Processes Described by the SWAT Model
Title of translation:&#22522;&#20110;SWAT&#27169;&#22411;&#30340;&#27969;&#22495;&#27827;&#36947;&#30813;&#37240;&#30416;&delta;<sup>15</sup>N&#21644;&delta;<sup>18</sup>O&#27169;&#25311;
Authors:Wang, Kang (1); Ran, Ning (1); Lin, Zhong-Bing (1); Zhou, Zu-Hao (2) 
Author affiliation:(1) State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan; 430072, China; (2) Department of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing; 100038, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:68-76
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To improve the reliability of methods to trace surface water pollutants in river basins, hydrological and water quality processes in the Fuxi River Basin were continuously monitored from 2013 to 2015, and the main pollution sources in the watershed and &delta;<sup>15</sup>N as well as &delta;<sup>18</sup>O in the rivers were measured simultaneously. The Soil and Water Assessment Tool (SWAT) model was used to simulate the NH<inf>4</inf><sup>+</sup> and NO<inf>3</inf><sup>-</sup> migration processes in the hydrological processes of the land surface and rivers. On this basis, the processes of mixing, transformation, and fractionation of &delta;<sup>15</sup>N and &delta;<sup>18</sup>O in NO<inf>3</inf><sup>-</sup> were coupled, and the simulation methods of &delta;<sup>15</sup>N and &delta;<sup>18</sup>O in the rivers were developed. The results showed that &delta;<sup>15</sup>N and &delta;<sup>18</sup>O in the rivers were mainly affected by the pollution sources in the river basin and the variation in runoff conditions during different hydrological periods. The contribution of the mixing process of different isotopes to the isotope abundance was 82.74%. The contribution of isotope fractionation in the process of nitrogen conversion was 16.26%. The influence of NH<inf>4</inf><sup>+</sup> and NO<inf>3</inf><sup>-</sup> concentration deviation from the SWAT simulation on the simulation errors of &delta;<sup>15</sup>N and &delta;<sup>18</sup>O was 10.44%. The &delta;<sup>18</sup>O simulation errors were 18.72% larger than those of &delta;<sup>15</sup>N because of the higher variation range of &delta;<sup>18</sup>O in rainfall and the complexity of &delta;<sup>18</sup>O. The systematic errors and deviations of the simulated &delta;<sup>15</sup>N and &delta;<sup>18</sup>O results using the proposed method were less than 10% and 15%, respectively. The simulation method of &delta;<sup>15</sup>N and &delta;<sup>18</sup>O in the river basin has a clear physical meaning, which provides a useful approach for tracing nitrogen sources in rivers.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:River pollution
Controlled terms:Isotopes - Mixing - Nitrates - Nitrogen - Rain - Rivers - Systematic errors - Water quality - Watersheds
Uncontrolled terms:Basin - Hydrological process - Isotope fractionation - Isotopic - Nitrogen conversion - Process simulations - Soil and water assessment tool - SWAT model
Classification code:443.3  Precipitation - 444.1  Surface Water - 445.2  Water Analysis - 453  Water Pollution - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.00e+01%, Percentage 1.04e+01%, Percentage 1.50e+01%, Percentage 1.63e+01%, Percentage 1.87e+01%, Percentage 8.27e+01%
DOI:10.13227/j.hjkx.201706028

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 51>

Accession number:20183705802939
Title:Source Apportionment of Black Carbon Aerosol in the North Suburb of Nanjing
Title of translation:&#21335;&#20140;&#21271;&#37066;&#40657;&#30899;&#27668;&#28342;&#33014;&#30340;&#26469;&#28304;&#35299;&#26512;
Authors:Xiao, Si-Han (1); Yu, Xing-Na (1); Zhu, Bin (1); He, Jia-Qi (1); L&uuml;, Rui (1); Sha, Dan-Dan (1) 
Author affiliation:(1) Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, 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:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:9-17
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on one year real-time measurements from a seven-wavelength Aethalometer combined with an Aethalometer model, the measured aerosol absorption coefficients at different wavelengths have been used to apportion the contribution of fossil fuel and biomass burning sources to the total black carbon (BC) mass concentration in the north suburb of Nanjing. Good consistency in the relationship between the Angstrom absorption exponent(&alpha;)and the ratio of BC from biomass burning sources to total BC (BB) was obtained during this period. The &alpha; was highest in winter and lowest in summer, which indicates the change in the source of the absorbing aerosols and their relative source strength. The BC and the BC from fossil fuel (BC<inf>ff</inf>) and biomass burning (BC<inf>bb</inf>) mass concentrations exhibit significant diurnal variation, with higher values during 07: 00 to 09: 00 (local time) and 18: 00 to 21: 00. The BC<inf>ff</inf>was three to five times higher than the BC<inf>bb</inf> and contributes greatest to the BC mass concentrations throughout the day. Night time BC values were about a factor of 1.2 higher than day time BC values. Meanwhile, the concentration weighted trajectory (CWT) analysis indicates that the highest value of BC was concentrated in the Zhejiang, Anhui, Jiangxi, and Fujian provinces.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:Fossil fuels
Controlled terms:Aerosols - Biomass - Carbon - Climate change - Fog
Uncontrolled terms:Absorbing aerosol - Aerosol absorption - Biomass-burning - Black carbon aerosol - Mass concentration - Nanjing - Real time measurements - Source apportionment
Classification code:443.1  Atmospheric Properties - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201706091

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 52>

Accession number:20183705802984
Title:Passivation of Simulated Pb-and Cd-Contaminated Soil by Applying Combined Treatment of Phosphate, Humic Acid, and Fly Ash
Title of translation:&#30967;&#37240;&#30416;, &#33104;&#27542;&#37240;&#19982;&#31881;&#29028;&#28784;&#32852;&#21512;&#38045;&#21270;&#22788;&#29702;&#27169;&#25311;&#38085;&#38217;&#27745;&#26579;&#22303;&#22756;
Authors:Zhao, Qing-Yuan (1, 2, 3); Li, Xiao-Ming (1, 2); Yang, Qi (1, 2); Chen, Can (3); Zhong, Zhen-Yu (3); Zhong, Yu (3); Chen, Fei (1, 2); Chen, Xun-Feng (1, 2); Wang, Xiang (1, 2) 
Author affiliation:(1) College of Environmental Science and Engineering, Hunan University, Changsha; 410082, China; (2) Key Laboratory of Environmental Biology and Pollution Control, Hunan University, Ministry of Education, Changsha; 410082, China; (3) Hunan Research Academy of Environment Sciences, Changsha; 410004, China 
Corresponding author:Li, Xiao-Ming(xmLi@hnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:389-398
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this study, three kinds of amendments including superphosphate, humic acid, and fly ash and their complex combination were adopted to passivate the artificially simulated Pb-and Cd-containing soils. The passivation efficiency evaluation was performed via the CaCl<inf>2</inf> and triethylenetriaminepentaacetic acid (DTPA) extraction method as well as a BCR morphological classification experiment. The microstructures and structures of the soil were explored further via X-ray diffraction (XRD) and scanning electron microscopy with X-ray energy dispersive spectroscopy (SEM-EDS) to elaborate the passivation mechanism. The results demonstrated that all passivation processes, excluding single humic acid addition, could reduce the CaCl<inf>2</inf> and DTPA extraction contents of Pb and Cd in soils, where the optimal efficiency could be achieved by the sequential addition of superphosphate and humic acid, followed by fly ash. There was a weakly positive correlation between soil pH and CaCl<inf>2</inf>/DTPA extraction content of Pb, a negative correlation between soil pH and CaCl<inf>2</inf>/DTPA extraction content of Cd, and a significantly negative correlation between available phosphorous content and CaCl<inf>2</inf>/DTPA extraction contents of Pb and Cd, suggesting the crucial role of available phosphorous contents to control the activities of Pb and Cd. In the presence of phosphate, humic acid, and fly ash, the Pb and Cd could convert from active weak acid extraction to low-activity residual speciation, resulting in effectively reducing Pb and Cd transferability. Throughout the XRD and SEM-EDS analyses, it was found that ion exchange was the predominant mechanism in heavy metal passivation by single superphosphate, wherein the heavy metals were transformed into an insoluble Ca-containing phosphate mixture. The dissolving/precipitation or surface adsorption could be concluded as the main mechanism in the combination of the three passivation agents that converted heavy metals to lead phosphate precipitate [(Pb<inf>3</inf>(PO<inf>4</inf>)<inf>2</inf>] or mixed heavy metal mineral [PbFe<inf>3</inf>(SO<inf>4</inf>)(PO<inf>4</inf>)(OH)<inf>6</inf>], so as to obtain superior heavy metal passivation achievement.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Lead compounds
Controlled terms:Biological materials - Cadmium - Chlorine compounds - Energy dispersive spectroscopy - Extraction - Fly ash - Ion exchange - Lead - Organic acids - Passivation  - Petroleum reservoir evaluation - Phosphates - Phosphorus - Scanning electron microscopy - Soil pollution - Soils - X ray diffraction
Uncontrolled terms:Cd-contaminated soils - Efficiency evaluation - Humic acid - Morphological classifications - Negative correlation - Positive correlations - Single superphosphate - X-ray energy dispersive spectroscopy
Classification code:461.2  Biological Materials and Tissue Engineering - 483.1  Soils and Soil Mechanics - 512.1.2  Petroleum Deposits : Development Operations - 539.2.1  Protection Methods - 546.1  Lead and Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201705273

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 53>

Accession number:20183705802973
Title:Comparison of Different Leaching Methods for Heavy Metals in Sludge Fly Ash and Comprehensive Toxicity Evaluation
Title of translation:&#27745;&#27877;&#39134;&#28784;&#20013;&#37325;&#37329;&#23646;&#19981;&#21516;&#28024;&#20986;&#26041;&#27861;&#27604;&#36739;&#21450;&#32508;&#21512;&#27602;&#24615;&#35780;&#20215;
Authors:Wang, Feng (1); Li, Run-Dong (1); Li, Yan-Long (1); Zhao, Yun-Bin (1); Yang, Tian-Hua (1) 
Author affiliation:(1) Key Laboratory of Clean Energy, College of Energy and Environment, Shenyang Aerospace University, Shenyang; 110136, China 
Corresponding author:Li, Run-Dong(rdlee@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:292-299
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Fly ash from sludge incineration was separated into five different sizes (&lt;1 &mu;m, 1-2.5 &mu;m, 2.5-10 &mu;m, 10-50 &mu;m, and&gt;50 &mu;m) by high-precision air classification equipment. The leaching of heavy metals was contrastively studied using the HJT 299-2007-sulfuric acid/nitric acid method, HJ 557-2009-Horizontal Oscillation Method, toxicity characteristic leaching procedure (TCLP), and European standard protocol (EN 12457-3) for the different size fractions of the fly ash. Based on the leaching results, an evaluation method for the comprehensive toxicity of heavy metal leaching was established. The results show that the content of heavy metals and the amount of leaching from the fly ash decrease with the increase in fly ash particle size. The leaching of the heavy metals Zn and Cu in the&lt;1 &mu;m particle size range of TCLP leaching method was the highest, at 107.34 mg&bull;kg<sup>-1</sup> and 318 mg&bull;kg<sup>-1</sup>, respectively. The TCLP and sulfuric acid/nitric acid methods of heavy metal leaching were more effective than the EU (EN 12457-3) and horizontal oscillation methods. According to the value of OPTI, the OPTI value of&lt;10 &mu;m fly ash was much larger than that of fly ash that was&gt;10 &mu;m. This indicated that the fly ash of particle size&lt;10 &mu;m was more toxic and more harmful.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Leaching
Controlled terms:Fly ash - Heavy metals - Incineration - Particle size - Size distribution - Toxicity
Uncontrolled terms:Air classifications - European Standards - Horizontal oscillations - Leaching methods - Metal leaching - Particle size ranges - Toxicity characteristic leaching procedures - Toxicity index
Classification code:461.7  Health Care - 531  Metallurgy and Metallography - 802.3  Chemical Operations - 922.2  Mathematical Statistics
Numerical data indexing:Size 1.00e-05m to 5.00e-05m, Size 1.00e-06m to 2.50e-06m, Size 2.50e-06m to 1.00e-05m
DOI:10.13227/j.hjkx.201705234

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 54>

Accession number:20183705802978
Title:Profile Distribution of Soil Organic and Inorganic Carbon Under Different Land Use Types in the Loess Plateau of Northern Shaanxi
Title of translation:&#38485;&#21271;&#40644;&#22303;&#19992;&#38517;&#21306;&#19981;&#21516;&#22303;&#22320;&#21033;&#29992;&#26041;&#24335;&#19979;&#22303;&#22756;&#30899;&#21078;&#38754;&#20998;&#24067;&#29305;&#24449;
Authors:Lan, Zhi-Long (1); Zhao, Ying (1); Zhang, Jian-Guo (1); Li, Hui-Jie (2); Si, Bing-Cheng (2); Jiao, Rui (1); Khan, Muhammad Numan (1); Sial, Tanveer Ali (1) 
Author affiliation:(1) Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resource and Environment, Yangling; 712100, China; (2) College of Water Resources and Architectural Engineering, Northwest A&amp;F University, Yangling; 712100, China 
Corresponding author:Zhao, Ying(yzhaosoils@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:339-347
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Carbon storage in the Loess Plateau is affected by land use. In order to assess the differences in soil organic carbon (SOC) and soil inorganic carbon (SIC) under different land use patterns in deep soil profiles, we investigated the distribution characteristics of SOC and SIC at 0 -20.0 m soil depth at three locations in the northern Shaanxi province (i. e., an economical plantation in Mizhi, a reforestation area in Shenmu, and a wind break and sand fixation forest district in Yuyang). The results showed that the order for SOC content was: pruning jujube tree (2.00 g&bull;kg<sup>-1</sup>)&gt;jujube tree (1.54 g&bull;kg<sup>-1</sup>)&gt;Caragana (0.97 g&bull;kg<sup>-1</sup>)&gt;degraded artificial grassland (0. 81 g&bull;kg<sup>-1</sup>)&gt;pine forests (0.70 g&bull;kg<sup>-1</sup>)&gt;natural grass field (0. 45 g&bull;kg<sup>-1</sup>), which indicated significant differences between SOC content and land use types (P&lt;0.05). Similarly, the order of SIC content was: pruning jujube tree (11.66 g&bull;kg<sup>-1</sup>)&gt;jujube tree (11.59 g&bull;kg<sup>-1</sup>)&gt;Caragana (9.62 g&bull;kg<sup>-1</sup>)&gt;degraded artificial grassland (8.07 g&bull;kg<sup>-1</sup>)&gt;pine forests (4.32 g&bull;kg<sup>-1</sup>)&gt;natural grass field (0.47 g&bull;kg<sup>-1</sup>). There were no significant differences between SIC content and soil profiles under the economical plantation of Mizhi and the reforestation area of Shenmu. There were significant differences for SIC content between an artificial economic forest, an area returning farmland to a forest (grass) profile, and a windbreak and sand fixation forest (P&lt;0.05). The SIC densities for pruning jujube tree, jujube tree, Caragana, degraded artificial grassland, pine forest, and natural grass field were 6.19, 7.71, 10.70, 10.78, 5.91, and 1.03 times that of its corresponding SOC density, respectively. It has been concluded that the soil carbon storage was significantly different for different land use patterns, and the SIC content was much higher than the SOC content in the soil profile.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Soil surveys
Controlled terms:Land use - Landforms - Organic carbon - Reforestation - Sediments - Soils
Uncontrolled terms:Carbon density - Land use type - Loess Plateau - Soil inorganic carbons - Soil organic carbon
Classification code:403  Urban and Regional Planning and Development - 481.1  Geology - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 804.1  Organic Compounds
Numerical data indexing:Size 0.00e+00m to 2.00e+01m
DOI:10.13227/j.hjkx.201704157

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 55>

Accession number:20183705802977
Title:Dynamics of Rice Photosynthesized Carbon Input and Its Response to Nitrogen Fertilization at the Jointing Stage: <sup>13</sup>C-CO<inf>2</inf> Pulse-labeling
Title of translation:&#25300;&#33410;&#26399;&#27700;&#31291;&#20809;&#21512;&#30899;&#36755;&#20837;&#30340;&#21160;&#24577;&#21464;&#21270;&#21450;&#20854;&#23545;&#26045;&#27694;&#30340;&#21709;&#24212;: <sup>13</sup>C-CO<inf>2</inf>&#33033;&#20914;&#26631;&#35760;
Authors:Chen, Shan (1, 2); Zhu, Zhen-Ke (2); Yuan, Hong-Zhao (2); Wang, Jiu-Rong (2); Peng, Pei-Qin (1); Ge, Ti-Da (2); Wu, Jin-Shui (2) 
Author affiliation:(1) College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha; 410004, China; (2) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China 
Corresponding author:Peng, Pei-Qin(pqpeng123@sina.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:331-338
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Photosynthesized carbon (C) is an important source of soil organic C in paddy fields, and its input and distribution are affected by rice growth and soil fertility. Fertilizer application plays an important role in rice growth. The <sup>13</sup>C pulse-labeling method was used to quantify the dynamics and distribution of input photosynthesized C in the rice-(rhizosphere-and bulk-) soil system and its response to nitrogen fertilizer (N) application. The results suggested that N fertilization significantly increased the rice aboveground and the root biomass and decreased the rice biomass root/shoot ratio. The amount of assimilated <sup>13</sup>C gradually decreased in the rice plants but gradually decreased over 0-6 days and increased over 6-26 days in the rhizosphere and bulk soil during rice growth. N fertilization significantly increased the amount of assimilated <sup>13</sup>C in the rhizosphere soil by 9.5%-32.6% compared with the control. In comparison to the unfertilized treatment, the application of N fertilization resulted in higher photosynthetic<sup>13</sup>C in rice aboveground and in the root by 24.5%-134.7% and 9.1%-106%, respectively. With the N fertilized and unfertilized treatments, 85.5%-93.2% and 91.3%-95.7%, respectively, of input photosynthetic<sup>13</sup>C was distributed in the rice plants. The results suggested that N fertilization significantly affected the distribution of photosynthesized C in the rice-soil system (P&lt;0.01). After 26 days of pulse labeling, the distribution of photosynthetic <sup>13</sup>C into rice aboveground was increased by 13.4%, while the distribution into the rhizosphere and bulk soil were decreased by 21.9% and 52.2%, respectively, in the N fertilized treatments compared with the unfertilized treatments. Therefore, the N application increased the distribution of photosynthesized carbon in the soil-rice system but decreased the accumulation in the rhizosphere and bulk soil. The findings of this study provided a theoretical basis for our understanding of the dynamic of photosynthetic C in the plant-soil system and the assimilation of the soil organic matter pool in the paddy soil ecosystem.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:34
Main heading:Soils
Controlled terms:Carbon - Carbon dioxide - Ecology - Nitrogen fertilizers
Uncontrolled terms:Bulk - Fertilizer applications - Nitrogen fertilization - Pulse-labeling - Rhizosphere - Rhizosphere soils - Root/shoot ratio - Soil organic matter pools
Classification code:454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 0.00e+00yr to 1.64e-02yr, Age 1.64e-02yr to 7.12e-02yr, Age 7.12e-02yr, Percentage 1.34e+01%, Percentage 2.19e+01%, Percentage 2.45e+01% to 1.35e+02%, Percentage 5.22e+01%, Percentage 8.55e+01% to 9.32e+01%, Percentage 9.10e+00% to 1.06e+02%, Percentage 9.13e+01% to 9.57e+01%, Percentage 9.50e+00% to 3.26e+01%
DOI:10.13227/j.hjkx.201702164

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 56>

Accession number:20183705802981
Title:Assessment of the Availability of Soil Copper and Related Influencing Factors at a County Scale
Title of translation:&#21439;&#22495;&#23610;&#24230;&#22303;&#22756;&#38108;&#30340;&#26377;&#25928;&#24615;&#21450;&#30456;&#20851;&#24433;&#21709;&#22240;&#32032;&#35780;&#20272;
Authors:Li, Jin-Fen (1, 2); Qu, Ming-Kai (1); Liu, Gang (2); Huang, Biao (1) 
Author affiliation:(1) Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (2) School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing; 210044, China 
Corresponding author:Qu, Ming-Kai(qumingkai@issas.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:363-370
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Understanding the spatial distribution of total copper, available copper, and the spatial non-stationary relationships between available copper and relevant environmental factors is important for the delineation of soil risk areas and the development of related control measures. This study was conducted in Zhangjiagang County of Jiangsu Province, China. The risk status for soil copper was assessed based on 357 soil samples in the study area. The effects of soil type and land-use type on the concentration of available soil copper were discussed first. Then, ordinary kriging was adopted to map the spatial distribution patterns of the total soil copper and available soil copper, and the spatial distribution map of the copper availability ratio (i. e., available copper/total copper) was also developed for the study area. The risk areas for soil copper were delineated based on the spatial distribution patterns of available soil copper and the copper availability ratio. Finally, a new spatial local regression technique, geographic weighted regression (GWR), was used to explore the local spatial regression relationships between available copper and its three main impact factors (i. e., total soil copper, soil pH, and SOM). Results showed that both soil type and land-use type had some effect on the concentration of available soil copper. The copper availability ratio had a strong spatial heterogeneity, with the higher values mainly in the northeast, southeast, and northwest of the study area and the lower values mainly in the middle and southwest of the study area. The range of the copper availability ratio is 13.56% to 29.15%. The results of the comparison of the traditional ordinary least squares regression (OLSR) and GWR showed that the GWR model had higher fitting accuracy than the OLSR model [i. e., a larger decision coefficient R<sup>2</sup>, and smaller corrected Akaike information criteria (AICc) and the sum of squares of residuals] in modeling the relationships between available copper and its three main impact factors. The GWR analysis showed that the effect of soil factors on the concentration of soil available copper was non-stationary. The GWR could effectively reveal the spatial non-stationary influence of the related soil factors on the concentration of available soil copper, and the results could explain the reasons for the accumulation of available soil copper in local areas. Potential risk areas for available soil copper were delineated based on the copper availability ratio and the concentration of available soil copper in the study area. The results should be crucial data for developing specific control measures for soil copper at a regional scale.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:34
Main heading:Soil pollution
Controlled terms:Copper - Land use - Regression analysis - Risk assessment - Soil surveys - Soils - Spatial distribution
Uncontrolled terms:Akaike information criterion - Environmental factors - Nonstationary - Ordinary least squares regressions - Regulation - Spatial distribution map - Spatial distribution patterns - Weighted regression
Classification code:403  Urban and Regional Planning and Development - 483.1  Soils and Soil Mechanics - 544.1  Copper - 914.1  Accidents and Accident Prevention - 921  Mathematics - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.36e+01% to 2.91e+01%
DOI:10.13227/j.hjkx.201705182

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 57>

Accession number:20183705802877
Title:Analysis of Sulfate-Reducing and Sulfur-Oxidizing Prokaryote Community Structures in Marine Sediments with Different Sequencing Technologies
Title of translation:&#28023;&#27915;&#27785;&#31215;&#29289;&#20013;&#30827;&#37240;&#30416;&#36824;&#21407;&#33740;&#21644;&#30827;&#27687;&#21270;&#33740;&#32676;&#33853;&#20998;&#26512;&#26041;&#27861;&#30340;&#27604;&#36739;
Authors:Zhang, Yu (1, 2, 3); Mi, Tie-Zhu (1, 2, 3); Zhen, Yu (1, 2, 3); Chen, Ye (2, 3, 4); Fu, Lu-Lu (2, 3, 4); Wang, Xun-Gong (1, 2, 3) 
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, 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 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:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:438-449
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sulfate-reducing prokaryotes (SRP) and sulfur-oxidizing prokaryotes (SOP) play vital roles in the sulfur cycle. The SRP community was used to represent a microbial community with high richness and diversity. The 454 pyrosequencing, Illumina high-throughput sequencing, and traditional clone library methods that target the dissimilatory sulfite reductase &beta; subunit gene (dsrB), which encodes a key enzyme in the sulfate reduction pathway, were used to compare the differences in SRP community characteristics. Comparative analyses suggested that Illumina high-throughput sequencing was a more appropriate method for SRP (high richness and diversity) community studies. The SOP soxB gene (~750 bp) was used as a representative of the long-sequence segment. The 454 pyrosequencing and Illumina high-throughput sequencing methods were used to compare the differences in SOP community characteristics. The results revealed that 454 pyrosequencing did not reflect its advantage of a longer read length; whereas, the Illumina high-throughput sequencing with more numerous and shorter sequence reads was more suitable when the soxB gene was used to investigate the community composition and diversity of SOP.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:44
Main heading:Throughput
Controlled terms:Cloning - Genes - Microorganisms - Reduction - Sediments - Submarine geology - Sulfur - Sulfur compounds
Uncontrolled terms:454-Pyrosequencing - Clone library - Community composition - Community structures - Comparative analysis - High-throughput sequencing - Microbial communities - Sulfate reducing
Classification code:461  Bioengineering and Biology - 471.1  Oceanography, General - 483  Soil Mechanics and Foundations - 802.2  Chemical Reactions - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201705054

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 58>

Accession number:20183705802971
Title:Analysis of Storage Sludge Composition Characteristics and Evolutionary Regularity in the Hunhe River Basin
Title of translation:&#27985;&#27827;&#27969;&#22495;&#36142;&#23384;&#27745;&#27877;&#25104;&#20998;&#29305;&#24449;&#21450;&#28436;&#21464;&#35268;&#24459;&#20998;&#26512;
Authors:Liu, Tian-Tian (1); Cui, Chong-Wei (1); He, Jun-Guo (1); Tang, Jian (1) 
Author affiliation:(1) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin; 150090, China 
Corresponding author:He, Jun-Guo(junguohe@263.net)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:276-283
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:With the acceleration of urbanization, the accumulation of storage sludge in the Hunhe River Basin has increased year by year, creating a potential and long-term threat to the environment. In order to realize the resource-saving and harmless treatment of storage sludge, the composition of storage sludge and the evolvement rule were analyzed and researched. The basic physicochemical properties (water content, pH, volatile organic compounds (VS), and total alkalinity), nutrient index (TC, TN, C/N, TK, and TP), microbial composition, and heavy metal contents and fraction were analyzed. The results showed the VS and various nutrient element contents decreased with the prolongation of storage time, and changes in water content were not obvious, which was independent of the storage time and only relevant to natural conditions. The pH was maintained at around 7, and the bacteria predominated in microorganisms, accounting for about 90%. The content of anaerobic microorganisms increased. The contents and fractions of Cu, Zn, Cr, Ni, Pb, Cd, As, and Hg did not change significantly, but the content of Cu was higher than the Chinese standard for agricultural utilization (GB 4284-1984). Therefore, there is a larger risk of storage sludge for agricultural use. Therefore, the analysis of the composition and evolution of storage sludge in the Hunhe River Basin is of great significance for further resource treatment of sludge.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Watersheds
Controlled terms:Agriculture - Alkalinity - Heavy metals - Microorganisms - Nutrients - Rivers - Volatile organic compounds
Uncontrolled terms:Anaerobic microorganisms - Evolution law - Harmless treatments - Heavy metal contents - Microbial composition - Physicochemical property - Resource utilizations - Sludge characteristics
Classification code:444.1  Surface Water - 461.9  Biology - 531  Metallurgy and Metallography - 801.1  Chemistry, General - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 9.00e+01%
DOI:10.13227/j.hjkx.201702121

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 59>

Accession number:20183705802951
Title:Pollution Status and Risks of Dioxin-like Polychlorinated Biphenyls in the Soil of the Yellow River
Title of translation:&#40644;&#27827;&#23736;&#36793;&#22303;&#22756;&#20013;&#31867;&#20108;&#33521;&#31867;&#22810;&#27695;&#32852;&#33519;&#27745;&#26579;&#29616;&#29366;&#21450;&#39118;&#38505;
Authors:Yao, Hong (1); Lu, Shuang (1, 2); Zhang, Xu (1, 3); Pei, Jin (1); Lu, Yin-Tao (1) 
Author affiliation:(1) School of Civil Engineering, Beijing Jiaotong University, Beijing; 100044, China; (2) Water and Environment Protection Agency of Nansha District, Guangzhou; 511400, China; (3) Beijing Urban Construction Design &amp; Development Group Co., Ltd., Beijing; 100037, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:123-129
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The concentration levels, toxic equivalency (TEQ) concentrations, and carcinogenic and non-carcinogenic risks of dioxin-like polychlorinated biphenyls in shore soil from the 40 national key monitoring sections along the entire Yellow River were comprehensively studied. The results showed that the concentrations of &sum;DL-PCBs in the soil were between 0.37-7.17 ng&bull;g<sup>-1</sup> (dry weight), and the mean value was 0.38 ng&bull;g<sup>-1</sup> (dry weight). The TEQ concentrations of DL-PCBs in the soil were between 0.00-30.31 pg&bull;g<sup>-1</sup> (dry weight), and the mean value is 13.63 pg&bull;g<sup>-1</sup> (dry weight), posing no significant risk to the ecological environment and human health. The carcinogenic and non-carcinogenic risks of DL-PCBs in this study did not exceed the limits set by the USEPA, and there were no obvious health risks. The residents in the middle reaches of the Yellow River were more vulnerable to DL-PCBs.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:River pollution
Controlled terms:Health risks - Organic pollutants - Polychlorinated biphenyls - Risks - Rivers - Soil pollution - Soils
Uncontrolled terms:Carcinogenic risk - Concentration levels - Dioxin-like polychlorinated biphenyls - Ecological environments - Human health - TEQ concentration - Toxic equivalency - Yellow river
Classification code:453  Water Pollution - 461.7  Health Care - 483.1  Soils and Soil Mechanics - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201704100

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 60>

Accession number:20183705802983
Title:Pollution Characteristics and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Soils of Shenyang North New Area
Title of translation:&#27784;&#21271;&#26032;&#21306;&#22303;&#22756;&#20013;&#22810;&#29615;&#33459;&#28867;&#27745;&#26579;&#29305;&#24449;&#21450;&#28304;&#35299;&#26512;
Authors:Li, Jia-Kang (1); Song, Xue-Ying (1); Wei, Jian-Bing (1); Wang, Ying-Yi (2); Li, Yu-Shuang (1); Zheng, Xue-Hao (1) 
Author affiliation:(1) Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education, Shenyang University, Shenyang; 110044, China; (2) School of Pharmaceutical Science, Southwest University, Chongqing; 400715, China 
Corresponding author:Song, Xue-Ying(songxy2046@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:379-388
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Topsoil (0-20 cm) samples (n=101) in 5 different land use types in Shenyang North New Area (SNNA), Shenyang, China were collected using the uniform grid layout method to investigate the spatial distribution characteristics, composition spectrum, and source analysis of 16 polycyclic aromatic hydrocarbons (PAHs) listed as priority pollutants by the Environmental Protection Agency of the United States. Results showed that the total concentration of the 16 PAHs (&sum;PAHs) in soils of SNNA ranged from 123.7 &mu;g&bull;kg<sup>-1</sup> to 932.5 &mu;g&bull;kg<sup>-1</sup>. The PAH components were mainly dominated by 3-ring and 4-ring PAHs, of which the proportion of 3-ring PAHs was the highest. The spatial distribution of the &sum;PAHs concentration was obvious, showing a decreasing tendency from south to north and from east to west. In the five soil types, the average concentrations of the &sum;PAHs were relatively higher in the urban green space and the artificial forest, followed by the vegetable land, while the total PAH concentrations in paddy fields and corn fields were relatively lower and had no obvious spatial distribution differences. Source apportionment results studied using characteristic ratio analysis and factor analysis/multivariate linear regression showed that the main sources of PAHs in the topsoil of SNNA were mixed sources. Industrial coal combustion and motor vehicle exhaust were the main PAH contributors, with a combined contribution rate of 79.6%. The oil spill and coke oven contribution rate was about 16.2%, and the biomass fuel combustion was about 4.2%.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Polycyclic aromatic hydrocarbons
Controlled terms:Coal combustion - Environmental Protection Agency - Fuels - Hydrocarbons - Land use - Mineral oils - Oil spills - Soil pollution - Soil surveys - Soils  - Spatial distribution
Uncontrolled terms:Average concentration - Characteristic ratio - Different land use types - Distribution characteristics - Polycyclic aromatic hydrocarbons (PAHS) - Priority pollutants - Shenyang North New Area - Source apportionment
Classification code:403  Urban and Regional Planning and Development - 453.1  Water Pollution Sources - 454.2  Environmental Impact and Protection - 483.1  Soils and Soil Mechanics - 513.3  Petroleum Products - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 804.1  Organic Compounds - 921  Mathematics
Numerical data indexing:Percentage 1.62e+01%, Percentage 4.20e+00%, Percentage 7.96e+01%, Size 0.00e+00m to 2.00e-01m
DOI:10.13227/j.hjkx.201704040

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 61>

Accession number:20183705802974
Title:Diurnal Variations of CH<inf>4</inf> and N<inf>2</inf>O Fluxes from the Drained Aquaculture Pond in the Minjiang River Estuary During Early Winter
Title of translation:&#21021;&#20908;&#26102;&#26399;&#38397;&#27743;&#27827;&#21475;&#21306;&#20859;&#27542;&#22616;&#25490;&#27700;&#21518;&#30340;CH<inf>4</inf>&#21644;N<inf>2</inf>O&#36890;&#37327;&#26085;&#21464;&#21270;&#29305;&#24449;
Authors:Yang, Ping (1, 2); Tan, Li-Shan (1); Huang, Jia-Fang (1, 2, 3); He, Qing-Hua (1); Tong, Chuan (1, 2, 3) 
Author affiliation:(1) School of Geographical Sciences, Fujian Normal University, Fuzhou; 350007, China; (2) Key Laboratory of Humid Sub-tropical Eco-geographical Process of Ministry of Education, Fuzhou; 350007, China; (3) Research Centre of Wetlands in Subtropical Region, Fujian Normal University, Fuzhou; 350007, China 
Corresponding author:Tong, Chuan(tongch@fjnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:300-309
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Annual drainage is a typical management activity practiced by operators as a way to export aquaculture effluent, accelerate aerobic decomposition of bottom soils, and avoid eutrophication during the non-culture period after harvest. Drainage activities can cause large changes in hydrology, nutrient cycling, sediment physicochemical properties, and even broad ecosystem functions. In order to understand the effects of drainage on the diurnal variation characteristics and magnitude of greenhouse gas (CH<inf>4</inf> and N<inf>2</inf>O) fluxes from the aquaculture ponds of the estuaries, a 24-hour continuous monitoring was conducted from one undrained pond (UDP) and one drained pond (DP) during early winter in the Minjiang River estuary on the southeast coast of China. Over the entire study period, the fluxes of CH<inf>4</inf> from the UDP and DP ranged from 0.04 to 0.10 mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup> and 14.04 to 33.72 mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>, respectively, with means of (0.07&plusmn;0.01) mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup> and (24.74&plusmn;2.33) mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>. The CH<inf>4</inf> flux was lower during the day and higher at night with a net flux as the sources of the CH<inf>4</inf>. The fluxes of N<inf>2</inf>O from the UDP ranged from -0.027 to 0.011 mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>, and the average fluxes of (0.002&plusmn;0.004) mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup> showed "weak absorption by day and emission at night. " The N<inf>2</inf>O fluxes from the DP were emitted all day (ranging from 0.59 to 1.76 mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>) with the average fluxes of N<inf>2</inf>O (1.07&plusmn;0.15) mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup> indicating higher fluxes at night and lower fluxes during the day. Our research demonstrated that drainage would significantly enhance CH<inf>4</inf> and N<inf>2</inf>O release from the aquaculture ponds. The study also preliminarily confirms that the undrained pond converted to a drained pond considerably alter the diurnal variation characteristics of the CH<inf>4</inf> and N<inf>2</inf>O emissions during early winter. Clearly, future measurements in situ at high frequency over a long time and at different spatial scales would be worth researching from drained aquaculture ponds.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Drainage
Controlled terms:Aquaculture - Estuaries - Eutrophication - Greenhouse gases - Lakes - Ponds - River pollution
Uncontrolled terms:Aerobic decomposition - Aquaculture effluents - Continuous monitoring - Diurnal variation - Environmental factors - Minjiang River estuaries - Physicochemical property - Shallow ponds
Classification code:407.2  Waterways - 451.1  Air Pollution Sources - 453  Water Pollution - 454.3  Ecology and Ecosystems - 821.3  Agricultural Methods
Numerical data indexing:Time 8.64e+04s
DOI:10.13227/j.hjkx.201705166

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 62>

Accession number:20183705802970
Title:Influence on Desulfurization Efficiency and Interactions of Fe/S and pH During H<inf>2</inf>S in situ Depression of High Solid Anaerobic Digestion
Title of translation:&#39640;&#21547;&#22266;&#27745;&#27877;&#21388;&#27687;&#28040;&#21270;&#20013;Fe/S&#21450;pH&#23545;&#21407;&#20301;&#25233;&#30827;&#25928;&#29575;&#24433;&#21709;&#21450;&#20854;&#20132;&#20114;&#20316;&#29992;
Authors:Han, Yun (1, 2); Cao, Yu-Qin (1); Zhuo, Yang (1, 2); Wang, Xiao-Fei (1); Han, Ya-Ting (3); Peng, Dang-Cong (1, 2) 
Author affiliation:(1) School of Municipal and Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Membrane Separation of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Shenzhen Lisai Environment Protection Science and Technology Co., Ltd., Shenzhen; 518028, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:269-275
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To evaluate the influence of Fe/S ratio and pH on sulfide removal efficiency and interactions between Fe/S and pH, anaerobic hydrogen sulfide in situ depression tests and digested sludge liquor sulfide removal tests were carried out by using dewatering sludge from a wastewater treatment plant (WWTP). Results showed that the concentration of hydrogen sulfide in biogas from the thermal pretreatment following anaerobic digestion process could be reduced from 170.4&times;10<sup>-6</sup> to 14.09&times;10<sup>-6</sup> at Fe/S=7.75, which means the biogas desulfurization treatment is not required. Under the condition of pH 7.00-7.50 and Fe/S 1-11, pH is the main influencing factor for sulfide removal. Improving the pH of anaerobic digestion is beneficial in reducing the dosage of Fe(&#8546;). An Fe/S ratio of 7.0 is the minimum to meet the biogas hydrogen sulfide emission standards during high solid sludge anaerobic digestion. The concentration of hydrogen sulfide was not up to standards if pH was below 7.30.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Anaerobic digestion
Controlled terms:Biogas - Desulfurization - Efficiency - Hydrogen sulfide - Hydrogen sulfide removal (water treatment) - Iron compounds - Sludge digestion - Sulfur compounds - Sulfur determination - Wastewater treatment
Uncontrolled terms:Anaerobic digestion process - Desulfurization efficiency - Digested sludges - High-solids - Hydrogen sulfide emission - Prediction equations - Thermal pre-treatment - Wastewater treatment plants
Classification code:452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 522  Gas Fuels - 801  Chemistry - 804.2  Inorganic Compounds - 913.1  Production Engineering
DOI:10.13227/j.hjkx.201706197

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 63>

Accession number:20183705802955
Title:Using HKUST-1 as a Template for Copper Oxides Preparation to Activate Peroxymonosulfate for RhB Degradation
Title of translation:&#20197;HKUST-1&#20026;&#27169;&#26495;&#21046;&#22791;&#38108;&#27687;&#21270;&#29289;&#27963;&#21270;&#36807;&#19968;&#30827;&#37240;&#27682;&#38078;&#38477;&#35299;&#32599;&#20025;&#26126;B
Authors:Pu, Jia-Yi (1); Wan, Jin-Quan (1, 2, 3); Wang, Yan (1, 2, 3); Ma, Yong-Wen (1, 2, 3); Wu, Shu-Bin (3) 
Author affiliation:(1) College of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou; 510000, China; (3) State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou; 510641, China 
Corresponding author:Wan, Jin-Quan(ppjqwan@scut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:152-160
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Using Cu-MOF (HKUST-1) as a template, copper oxide was prepared by heat treatment under different temperatures in this study. The effect of treatment temperature on the composition and morphology of the products were studied. The catalytic abilities of the copper oxide products were tested through a series of experiments of activating peroxymonosulfate (PMS) to degrade RhB under different conditions. The results of XRD, SEM, and XPS show that the product is gradually transformed from a Cu<inf>2</inf>O/CuO mixture into pure CuO with the increase of heat treatment temperature. The original octahedron structure of HKUST-1 was collapsed. Under neutral pH conditions, when the dosage of PMS and CuO-650 was 1.00 mmol&bull;L<sup>-1</sup> and 0.20 g&bull;L<sup>-1</sup>, respectively, the total degradation of RhB (concentration of 0.10 mmol&bull;L<sup>-1</sup>) could be completed within 90 min. In addition, CuO-650 also has many advantages, such as it can be applied within a wide range of pH values. In addition, the copper ion dissolution rate was low (1. 309 mg&bull;L<sup>-1</sup> at pH=3 and 0.987 mg&bull;L<sup>-1</sup> at pH=7), and it has great recyclability and stability. These characteristics further proved that CuO-650 can be used as a promising catalyst for PMS activation.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Copper oxides
Controlled terms:Chemical activation - Crystalline materials - Heat treatment - Metal ions - Organometallics - pH - Rhodium compounds
Uncontrolled terms:Advanced Oxidation Processes - Catalytic ability - Dissolution rates - Heat treatment temperature - Metal organic framework - Peroxymonosulfate - Recyclability - Treatment temperature
Classification code:531.1  Metallurgy - 537.1  Heat Treatment Processes - 801.1  Chemistry, General - 804  Chemical Products Generally - 933.1  Crystalline Solids
Numerical data indexing:Mass_Density 2.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 3.09e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 9.87e-04kg/m3 to 2.20e-02kg/m3, Molar_Concentration 1.00e+00mol/m3 to 2.20e-02mol/m3, Molar_Concentration 1.00e-01mol/m3 to 2.20e-02mol/m3, Time 5.40e+03s
DOI:10.13227/j.hjkx.201703060

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 64>

Accession number:20183705802941
Title:Characteristics of Organic and Elemental Carbon in PM<inf>10</inf> and PM<inf>2.5</inf> in Yulin City, Guangxi
Title of translation:&#24191;&#35199;&#29577;&#26519;&#24066;&#22823;&#27668;PM<inf>10</inf>&#21644;PM<inf>2.5</inf>&#20013;&#26377;&#26426;&#30899;&#21644;&#20803;&#32032;&#30899;&#27745;&#26579;&#29305;&#24449;&#20998;&#26512;
Authors:Huang, Jiong-Li (1); Chen, Zhi-Ming (1); Mo, Zhao-Yu (1, 2); Li, Hong-Jiao (1); Yang, Jun-Chao (1); Liu, Hui-Lin (1); Mao, Jing-Ying (1); Liang, Gui-Yun (1); Zhang, Da-Biao (1); Wu, Xiong-Ping (3); Hao, Shuang (3) 
Author affiliation:(1) Scientific Research Academy of Guangxi Environmental Protection, Nanning; 530022, China; (2) Department of Environmental Science and Engineering, Fudan University, Shanghai; 200433, China; (3) Yulin Environmental Monitoring Center, Yulin; 537000, China 
Corresponding author:Mao, Jing-Ying(13978185061@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:27-37
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Two hundred eighteen PM<inf>10</inf> and 202 PM<inf>2.5</inf> samples were collected at three sampling sites to study the pollution characteristics of carbonaceous aerosols in Yulin from July 2015 to March 2016. Organic carbon (OC) and elemental carbon (EC) in the PM<inf>10</inf> and PM<inf>2.5</inf> samples were analyzed by a Multiwavelength Thermal/Optical Carbon Analyzer, and the characteristics, including pollution levels, temporal and spatial distributions, and possible sources of OC and EC, were investigated. The results showed that the OC and EC mass concentrations in PM<inf>10</inf> in Yulin were 10.99 and 5.11 &mu;g&bull;m<sup>-3</sup>, respectively, while the OC and EC mass concentrations in PM<inf>2.5</inf> were 7.51 and 4.70 &mu;g&bull;m<sup>-3</sup>, respectively. Strong correlations between OC and EC were found in PM<inf>10</inf>(R<sup>2</sup>=0.58) and PM<inf>2.5</inf>(R<sup>2</sup>=0.60). The winter average concentrations of secondary organic carbon (SOC) in PM<inf>10</inf> and PM<inf>2.5</inf> were 14.50 &mu;g&bull;m<sup>-3</sup> and 6.74 &mu;g&bull;m<sup>-3</sup>, respectively. The SOC/OC ratios in both the PM<inf>10</inf> and PM<inf>2.5</inf> were higher than 0.5. The contribution of SOC to OC was 80.6% in PM<inf>10</inf> and 77.7% in PM<inf>2.5</inf>, which were the highest in the summer, in accordance with the high temperature and strong solar radiation in the summer.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Particles (particulate matter)
Controlled terms:Organic carbon - Thermal pollution
Uncontrolled terms:Average concentration - Element carbons - Organic and elemental carbon - PM10 - PM2.5 - Secondary organic carbons (SOC) - Temporal and spatial distribution - Yulin
Classification code:804.1  Organic Compounds - 951  Materials Science
Numerical data indexing:Percentage 7.77e+01%, Percentage 8.06e+01%
DOI:10.13227/j.hjkx.201702102

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 65>

Accession number:20183705802982
Title:Application of the LUR Model in the Prediction of Spatial Distributions of Soil Heavy Metals
Title of translation:&#22522;&#20110;&#25913;&#36827;LUR&#27169;&#22411;&#30340;&#21306;&#22495;&#22303;&#22756;&#37325;&#37329;&#23646;&#31354;&#38388;&#20998;&#24067;&#39044;&#27979;
Authors:Zeng, Jing-Jing (1, 3); Shen, Chun-Zhu (2, 3); Zhou, Sheng-Lu (1, 3); Lu, Chun-Feng (1, 4); Jin, Zhi-Feng (2, 3); Zhu, Yan (4) 
Author affiliation:(1) School of Geographic and Oceanographic, Nanjing University, Nanjing; 210023, China; (2) Jiangsu Institute of Land Survey and Planning, Nanjing; 210008, China; (3) Key Laboratory of Coastal Zone Exploitation and Protection, Ministry of Land and Resources, Nanjing; 210008, China; (4) Nanjing Nanyuan Land Development and Utilization Consulting Co., Ltd., Nanjing; 210008, China 
Corresponding author:Zhou, Sheng-Lu(zhousl@nju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:371-378
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Using the Jintan District of Changzhou City, Jiangsu Province as an example, the LUR model was used to study the spatial distribution of heavy metals and to simulate the spatial distribution of heavy metals in the study area. Compared with the traditional LUR model and the ordinary Kriging interpolation model, the following conclusions were obtained. &#9312; The soil heavy metal content in the study area was highly and significantly correlated with land factors, with the main factor of land use and influencing factors of heavy metals in the soil environment (P&lt;0.01). In terms of influencing factors, the soil Cu and Zn contents were significantly correlated with the area related to traffic in a 2 000 m buffer area and 2 000 m buffer zone, respectively. The soil Cr, Cu, and Zn contents were significantly correlated with OM, C<inf>org</inf>, TC, and TN (P&lt;0.01). &#9313; The R<sup>2</sup> of the LUR-S models of the spatial distribution of the heavy metals, Pb, Cr, Cu, and Zn, in the study area were improved by 0.041, 0.406, 0.102, and 0.501, respectively, compared with the traditional LUR model. The accuracy test R<sup>2</sup> values were improved by 0.147 7, 0.011 6, 0.231 0, and 0.081, respectively; and the RMSE was reduced by 2.413, 0.631, 1.112, and 2.138, respectively. It was shown that the LUR-S model, which considered the source-sink relationship, had a higher accuracy than the traditional LUR model and ordinary Kriging interpolation model. &#9314; The LUR-S model was more suitable for the prediction of the spatial distribution of heavy metals with lower pollution and smaller variations, while results for the prediction of the heavy metals with higher pollution and larger variations were worse.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Spatial distribution
Controlled terms:Forecasting - Heavy metals - Interpolation - Land use - Pollution - Soils
Uncontrolled terms:Accuracy test - Jiangsu province - Jintan District - Land use regression - Ordinary kriging - Soil environment - Soil heavy metals - Source-sink relationships
Classification code:403  Urban and Regional Planning and Development - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 921  Mathematics - 921.6  Numerical Methods
Numerical data indexing:Size 2.00e+03m
DOI:10.13227/j.hjkx.201704024

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 66>

Accession number:20183705802876
Title:Effects of Long-term Fertilization Regimes on Microbial Biomass, Community Structure and Activity in a Paddy Soil
Title of translation:&#38271;&#26399;&#26045;&#32933;&#23545;&#31291;&#30000;&#22303;&#22756;&#24494;&#29983;&#29289;&#37327;, &#32676;&#33853;&#32467;&#26500;&#21644;&#27963;&#24615;&#30340;&#24433;&#21709;
Authors:Wang, Wei-Hua (1, 2); Liu, Yi (2); Tang, Hai-Ming (3); Sun, Zhi-Long (4); Li, Bao-Zhen (2); Ge, Ti-Da (2); Wu, Jin-Shui (1, 2) 
Author affiliation:(1) College of Resources and Environment, Huazhong Agriculture University, Wuhan; 430070, China; (2) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (3) Hunan Soil and Fertilizer Institute, Changsha; 410125, China; (4) Integrated Service for Agriculture Ningxiang County Huilongpu Town, Changsha; 410606, China 
Corresponding author:Liu, Yi(liuyi@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:430-437
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Four paddy soils were collected in Ningxiang County, Hunan province. These used with different long-term fertilization regimes, including a control without fertilizer (CK), chemical fertilization with nitrogen, phosphate, and kalium (NPK), straw fertilization combined with NPK (ST), and manure fertilization combinedwith NPK (OM). Phospholipid fatty acid (PLFA) technology and Microresp<sup>TM</sup> method were used to study the effect of long-term fertilization on soil microorganism abundance, community structure, and activity. Results showed that the abundance of bacteria, fungi, gram-negative (G<sup>-</sup>) bacteria, and gram-positive (G<sup>+</sup>) bacteria in the soil from the OM treatment was generally higher than for the other treatments; these levels were lower in the ST and NPK treatments and lowest in the CK treatment. The principal components analysis (PCA) of PLFA showed that the community structure of microorganisms in NPK, ST, and OM treatments was altered in comparison with that in CK, especially in the case of the ST and OM treatments. MicroResp<sup>TM</sup> results revealed that compared to the CK treatment (1.28 &mu;g&bull;h<sup>-1</sup>), soil microorganisms in the OM treatment had the highest average utilization rate of multiple carbon sources (1.81 &mu;g&bull;h<sup>-1</sup>), followed by ST (1.19 &mu;g&bull;h<sup>-1</sup>), CK (1.28 &mu;g&bull;h<sup>-1</sup>), and NPK (0.95 &mu;g&bull;h<sup>-1</sup>). Furthermore, different long-term fertilization regimes resulted in distinct carbon source preferences for the soil microorganisms and revealed a significant alteration in the microbial community. Conclusively, long-term fertilizer with straw or manure changes the microbial community and is a benefit for improving the biomass and activity of microorganism in rice paddy soils.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:39
Main heading:Bacteria
Controlled terms:Carbon - Fatty acids - Manures - Nitrogen fertilizers - Phospholipids - Principal component analysis - Soils
Uncontrolled terms:Community structures - Long-term fertilization - Microbial communities - Paddy soils - Phospholipid fatty acids - Principal components analysis - Soil micro-organisms - Soil microbes
Classification code:483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.1  Organic Compounds - 821.5  Agricultural Wastes - 922.2  Mathematical Statistics
Numerical data indexing:Mass_Flow_Rate 2.64e-13kg/s to 7.92e+04kg/s, Mass_Flow_Rate 3.31e-13kg/s to 7.92e+04kg/s, Mass_Flow_Rate 3.56e-13kg/s to 7.92e+04kg/s, Mass_Flow_Rate 5.03e-13kg/s to 7.92e+04kg/s
DOI:10.13227/j.hjkx.201706039

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 67>

Accession number:20183705802959
Title:Comparison of Amphoteric-Cationic and Amphoteric-Anionic Modified Magnetic Bentonites: Characterization and Sorption Capacity of Phenol
Title of translation:&#38451;(&#38452;)&#31163;&#23376;&#22797;&#37197;&#20462;&#39280;&#20004;&#24615;&#30913;&#24615;&#33192;&#28070;&#22303;&#30340;&#34920;&#38754;&#29305;&#24449;&#24046;&#24322;&#21450;&#23545;&#33519;&#37210;&#21560;&#38468;&#30340;&#24433;&#21709;
Authors:Ren, Shuang (1); Meng, Zhao-Fu (1, 2); Wang, Teng (1); Zhang, Yang (1); Tian, Kai (1); Liu, Wei (1, 3); Yan, Dong-Xu (1) 
Author affiliation:(1) College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China; (2) Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China; (3) Department of Chemical and Environmental Engineering, Xinjiang Institute of Engineering, Urumqi; 830091, China 
Corresponding author:Meng, Zhao-Fu(zfmeng1996@263.net)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:187-194
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Magnetic bentonite is modified by an amphoteric surfactant (dodecyl dimethyl betaine, BS-12), then modified by a cationic surfactant (Cetyl Trimethyl Ammonium Bromide, CTMAB) and anionic surfactant (Sodium lauryl sulfonate, SDS). Amphoteric-cationic modified magnetic bentonite (BS-CT-MBT) and amphoteric-anionic modified magnetic bentonite (BS-SDS-MBT) are obtained. Structural identification of the samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analyses (TG), Fourier transform infrared spectra (FTIR), and vibrating sample magnetometer (VSM). The carbon-nitrogen content, specific surface area, and pore volume were also evaluated. Batch isotherm studies were conducted to evaluate the sorption of phenol. The results show that BS-CT-MBT and BS-SDS-MBT can be separated by magnetic separation. The carbon content-nitrogen content and content of surfactants of the BS-CT-MBT increase, while surface area and pore volume decrease compared to those of BS-MBT. Compared with BS-MBT, the carbon-nitrogen content, content of surfactants, and pore volume of BS-SDS-MBT are decreasing and surface area is increasing. The desorption rate of the surfactants is less than 9% at pH 6.0 and in 0.1 mol&bull;L<sup>-1</sup> NaCl solution. The Henry equation is the optimal description for the phenol sorption isotherms, implying a partitioning sorption process. The amount of phenol sorption follows the order: BS-CT-MBT&gt;BS-MBT&gt;BS-SDS-MBT&gt;BT&gt;MBT, which significantly correlates with the variation of the content of surfactant. Amphoteric magnetic bentonites modified by CTMAB have better absorption performance for phenol than those modified by SDS.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:Amphoteric surfactants
Controlled terms:Anionic surfactants - Bentonite - Carbon - Cationic surfactants - Characterization - Computerized tomography - Dyes - Fourier transform infrared spectroscopy - Isotherms - Magnetic separation  - Nitrogen - Phenols - Scanning electron microscopy - Sodium chloride - Sorption - Surface active agents - Thermogravimetric analysis
Uncontrolled terms:Absorption performance - Cetyl trimethyl ammonium bromides - Fourier transform infrared spectra - Isotherm studies - Magnetic - Sorption capacities - Structural identification - Vibrating sample magnetometer
Classification code:482.2  Minerals - 723.5  Computer Applications - 801  Chemistry - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 951  Materials Science
Numerical data indexing:Molar_Concentration 1.00e+02mol/m3 to 2.20e-02mol/m3, Percentage 9.00e+00%
DOI:10.13227/j.hjkx.201706227

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 68>

Accession number:20183705802952
Title:Effects of Flooding and Drying on the Transformation of Soil Inorganic Phosphorus in the Water-Level-Fluctuating Zone of the Three Gorges Reservoir, China
Title of translation:&#28153;&#27700;&#33853;&#24178;&#19979;&#19977;&#23777;&#27700;&#24211;&#28040;&#33853;&#24102;&#22303;&#22756;&#26080;&#26426;&#30967;&#24418;&#24577;&#36716;&#21270;&#29305;&#24449;
Authors:Zhou, Jian (1); Li, Chun-Hui (1); Zhang, Zhi-Yong (1, 2); Hu, Hong-Qing (1); Wan, Cheng-Yan (2); Hu, Lian (2); Pan, Xiao-Jie (2) 
Author affiliation:(1) College of Resource and Environment, Huazhong Agricultural University, Wuhan; 430070, China; (2) Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources, Institute of Hydroecology, Ministry of Water Resources, Wuhan; 430079, China 
Corresponding author:Hu, Hong-Qing(hqhu@mail.hzau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:130-136
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The implementation of the Three Gorges Project formed a water-level-fluctuating zone, and flooding and drying affects the soil properties and water quality of the Water-Level-Fluctuating Zone. The laboratory simulation or field sampling were conducted; however, the results cannot reflect the real conditions in practice. The effects of flooding and drying on the physical and chemical properties of soil and the transformation characteristics of inorganic phosphorus were studied in order to provide a theoretical reference for soil phosphorus loss and water eutrophication in water-level-fluctuating zone of the Three Gorges Reservoir. To investigate the conversion of soil phosphorus, plastic pots with soil were suspended at different depths (0, 2, 5, and 15 m) and submerged for 30, 60, and 180 d, and exposed for 180 d. The effects of submerged depth and time on the soil physical and chemical properties and inorganic phosphorus forms were studied. The results showed that soil pH, organic matter, total phosphorus, and available phosphorus decreased and then increased subsequently during the flooding period. After exposure for 180 d, soil pH, organic matter, and total phosphorus content decreased, while available phosphorus content increased. After flooding, the ratio of various forms of inorganic phosphorus to total phosphorus was Fe-P&gt;Al-P&gt;Ca<inf>8</inf>-P&gt;Ca<inf>2</inf>-P. The content of Ca<inf>2</inf>-P and Ca<inf>8</inf>-P decreased at 0 m and 2 m and decreased at 5 m and 15 m and then increased with increased flooding time. After exposure for 180 days, the content of inorganic phosphorus increased significantly, and the content of inorganic phosphorus decreased as flooding depth increased. Al-P content increased with the flooding time, but there was no obvious change with flooding depth. The content of Fe-P did not change with the time and the depth of flooding.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Phosphorus compounds
Controlled terms:Aluminum compounds - Biogeochemistry - Biological materials - Calcium compounds - Chemical properties - Drying - Eutrophication - Floods - Iron compounds - Oil well flooding  - Organic compounds - Phosphorus - Reservoirs (water) - Underwater soils - Water levels - Water quality
Uncontrolled terms:Available phosphorus - Inorganic phosphorus - Laboratory simulation - Physical and chemical properties - Soil physical and chemical properties - Three Gorges project - Three gorges reservoir - Three gorges reservoir area
Classification code:441.2  Reservoirs - 445.2  Water Analysis - 461.2  Biological Materials and Tissue Engineering - 471.1  Oceanography, General - 511.1  Oil Field Production Operations - 801  Chemistry - 801.2  Biochemistry - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Age 4.93e-01yr, Size 0.00e+00m, Size 1.50e+01m, Size 2.00e+00m, Size 5.00e+00m
DOI:10.13227/j.hjkx.201705105

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 69>

Accession number:20183705802954
Title:Enhanced Photoelectrocatalytic Oxidation of Cu(CN)<inf>3</inf><sup>2-</sup> and Synchronous Cathodic Deposition of Cu by Peroxydisulfate
Title of translation:K<inf>2</inf>S<inf>2</inf>O<inf>8</inf>&#24378;&#21270;g-C<inf>3</inf>N<inf>4</inf>&#34180;&#33180;&#30005;&#26497;&#20809;&#30005;&#20652;&#21270;&#38477;&#35299;Cu(CN)<inf>3</inf><sup>2-</sup>&#24182;&#21516;&#27493;&#22238;&#25910;Cu
Authors:Dang, Cong-Zhe (1, 2); Li, Yi-Bing (1); Wang, Yan-Bin (2); Zhao, Xu (2) 
Author affiliation:(1) School of Civil and Transportation, Hebei University of Technology, Tianjin; 300401, China; (2) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China 
Corresponding author:Li, Yi-Bing(lybhebut@sina.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:145-151
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Oxidation of Cu-cyanides by a photoelectrocatalytic method was enhanced by adding peroxydisulfate (PS). In the photoelectrocatalytic system (PEC), graphitic carbon nitride (g-C<inf>3</inf>N<inf>4</inf>) thin films prepared by a liquid-based reaction and graphitic carbon felt (GCF) were used as the photoanode and cathode, respectively. First, various processes, including PEC, PS oxidation, and PEC with PS addition (PEC/PS), were compared for Cu-cyanide removal. The addition of PS improved greatly the photoelectrocatalytic efficiency for the oxidation of CN<sup>-</sup> and the recovery of Cu on the cathode. The effect of the amount of K<inf>2</inf>S<inf>2</inf>O<inf>8</inf> was investigated in detail. The removal efficiency of CN<sup>-</sup> and Cu recovery can reach up to 86.23% and 82.11%, respectively, with 1 mmol&bull;L<sup>-1</sup> K<inf>2</inf>S<inf>2</inf>O<inf>8</inf> at 1.0 V bias potential. Combined with the SEM, EDS, and XPS analysis of the electrode surface, it was concluded that the free Cu<sup>+</sup> was oxidized and existed in the precipitation and photoanode in the form of CuO. Conversely, the liberated Cu<sup>+</sup>/Cu<sup>2+</sup> ions were electrochemically reduced to elemental Cu on the surface of the graphitic carbon felt cathode. As a result, metal Cu was recovered from the wastewater of the copper cyanide complexes. Electron spin resonance and radical quenching experiment analysis showed that the oxidation of CN<sup>-</sup> is assigned to sulfate radical oxidation and non-radical oxidation processes.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Oxidation
Controlled terms:Carbon films - Cathodes - Copper oxides - Cyanides - Efficiency - Felt - Magnetic moments - Metal recovery - Sulfur compounds
Uncontrolled terms:Copper complexes - G-C3N4 - Peroxydisulfate - Photoelectrocatalytic - Radical oxidation
Classification code:701.2  Magnetism: Basic Concepts and Phenomena - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 811.1  Pulp and Paper - 813.2  Coating Materials - 913.1  Production Engineering
Numerical data indexing:Percentage 8.21e+01%, Percentage 8.62e+01%, Voltage 1.00e+00V
DOI:10.13227/j.hjkx.201706126

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 70>

Accession number:20183705802942
Title:Concentrations and Compositions of Different Forms of Nitrogen and Phosphorus in Atmospheric Aerosols in the Qingdao Coastal Region and over the Yellow and Bohai Sea
Title of translation:&#38738;&#23707;&#36817;&#28023;&#21450;&#40644;&#28196;&#28023;&#22823;&#27668;&#27668;&#28342;&#33014;&#20013;&#19981;&#21516;&#24418;&#24577;&#27694;&#30967;&#36136;&#37327;&#27987;&#24230;&#21450;&#32452;&#25104;&#29305;&#24449;
Authors:Zhang, Rui-Feng (1); Qi, Jian-Hua (1); Ding, Xue (1); Xie, Dan-Dan (1) 
Author affiliation:(1) Key Laboratory of Marine Environment and Ecology, College of Environmental Science and Engineering, Ocean University of China, Qingdao; 266100, China 
Corresponding author:Qi, Jian-Hua(qjianhua@ouc.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:38-48
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The total suspended particulate (TSP) samples were collected in the Qingdao coastal region and over the Yellow and Bohai Sea from June to July in 2016. The diurnal and nightly TSP samples were also continuously collected in the Qingdao coastal region from August 6 to 15. The concentrations of dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), dissolved total nitrogen (DTN), dissolved total phosphorus (DTP), total nitrogen (TN), and total phosphorus (TP) in the TSP samples were analyzed. Results showed that the concentrations of different forms of nitrogen and phosphorus in Qingdao were higher than those over the Yellow and Bohai Sea during the same sampling period. The contribution of dissolved N was similar to that of insoluble N to TN in Qingdao, with the ratio of DTN to TN of 56%. However the DTN was the dominant contributor of TN over the Yellow and Bohai Sea, accounting for 72% of TN on average. The inorganic nitrogen was the dominant species of DTN in Qingdao and over the Yellow and Bohai Sea (YBS), accounting for 67% and 75% of DTN, respectively. The contribution of dissolved P to TP was similar to that of insoluble P to TP in Qingdao and over the Yellow and Bohai Sea, and the DTP accounted for 49% and 58% of TP in Qingdao and over YBS, respectively. The ratio of IP to DTP was slightly higher than that of OP, with values of 56% and 59% in Qingdao and over the YBS, respectively. The origin of the air mass affected the concentrations and compositions of nitrogen and phosphorus in the aerosols. The concentrations of DIN, dissolved organic nitrogen (DON), TN, DIP, and dissolved organic phosphorus (DOP) in the aerosols from southern air mass were higher than those from northern and marine air masses. The concentration of DON in the diurnal aerosol samples was similar to that in the nightly samples; however, the concentrations of DIN and TN were higher in the diurnal aerosols than those in the nightly aerosols. The DTN was the dominant species of TN in the diurnal and nightly aerosol samples, accounting for 79% of TN on average. Inorganic nitrogen was the dominant species of DTN in the diurnal and nightly aerosols. The ratio of DIN to DTN decreased from 70% in diurnal samples to 61% in nightly samples. The concentrations of DIP were close to that of DOP in the diurnal and nightly aerosols; however, the concentrations of TP were higher in the diurnal aerosols than in the nightly ones. The insoluble P was the dominant form of TP in the aerosols, accounting for 83% and 62% of TP during the day and night, respectively. The contribution of DTP to TP in the nightly aerosols samples was much higher than that in the diurnal aerosols. For both day and night samples, inorganic phosphorus was the dominant species of DTP in aerosols, with a ratio of 71%-77%.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:49
Main heading:Atmospheric aerosols
Controlled terms:Atmospheric thermodynamics - Coastal zones - Dissolution - Meteorology - Nitrogen - Phosphorus
Uncontrolled terms:Bohai Sea - Dissolved inorganic nitrogens - Dissolved inorganic phosphorus - Dissolved organic nitrogen - Dissolved organic phosphorus (DOP) - Qingdao - Total suspended particulates - Yellow sea
Classification code:443.1  Atmospheric Properties - 471  Marine Science and Oceanography - 802.3  Chemical Operations - 804  Chemical Products Generally
Numerical data indexing:Percentage 4.90e+01%, Percentage 5.60e+01%, Percentage 5.80e+01%, Percentage 5.90e+01%, Percentage 6.10e+01%, Percentage 6.20e+01%, Percentage 6.70e+01%, Percentage 7.00e+01%, Percentage 7.10e+01% to 7.70e+01%, Percentage 7.20e+01%, Percentage 7.50e+01%, Percentage 7.90e+01%, Percentage 8.30e+01%
DOI:10.13227/j.hjkx.201706021

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 71>

Accession number:20183705802965
Title:Effect of Carbon Source on Lab-scale SAD Process in a Wastewater Treatment Plant
Title of translation:&#30899;&#28304;&#23545;&#27745;&#27700;&#22788;&#29702;&#21378;SAD&#24037;&#33402;&#23567;&#35797;&#30340;&#24433;&#21709;
Authors:Li, Dong (1); Zhao, Shi-Xun (1); Wang, Jun-An (2); Zhu, Jin-Feng (1); Guan, Hong-Wei (1); Zhang, Jie (1, 3) 
Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China; (2) Technology Research and Development Center, Beijing Sander Environmental Group, Beijing; 101102, China; (3) 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:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:232-238
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Lab-scale anaerobic ammonia oxidation and denitrification (SAD) processes were operated simultaneously in a municipal waste water treatment plant (WWTP). Sewage treated by the A/O and nitrification process was used as the substance to start up an anaerobic ammonia oxidation filter reactor. Adding glucose and sodium propionate to influent was used as the substance to start up the SAD filter reactor after the successful start-up of the ANAMMOX reactor. The SAD process performed well with an average total nitrogen concentration in the effluent of 6.41 mg&bull;L<sup>-1</sup>when 30 mg&bull;L<sup>-1</sup> glucose was added to the effluent sewage at ambient temperature. Compared with the ANAMMOX process, the total nitrogen concentration in the effluent from the SAD process decreased 42%. The stability of the SAD process was destroyed and the SAD process turned into a denitrification process when 30 mg&bull;L<sup>-1</sup> glucose was added in the influent sewage in a low temperature environment. In normal and low temperature environments, the SAD process functioned well, and the average total nitrogen concentration of the effluent was 6.54 mg&bull;L<sup>-1</sup> when 30 mg&bull;L<sup>-1</sup> sodium propionate was added in the influent sewage. Compared with glucose, sodium propionate had little influence on the SAD process.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Wastewater treatment
Controlled terms:Ammonia - Carbon - Denitrification - Effluents - Filtration - Glucose - Nitrification - Nitrogen - Nitrogen removal - Passive filters  - Sewage - Sodium - Temperature - Waste treatment - Water treatment - Water treatment plants
Uncontrolled terms:ANAMMOX - Carbon source - Denitrification process - Filter - Low temperature environment - Municipal wastewater treatment plants - Nitrification process - Wastewater treatment plants
Classification code:445.1  Water Treatment Techniques - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 549.1  Alkali Metals - 641.1  Thermodynamics - 703.2  Electric Filters - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 3.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 6.54e-03kg/m3 to 2.20e-02kg/m3, Percentage 4.20e+01%
DOI:10.13227/j.hjkx.201706279

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 72>

Accession number:20183705802958
Title:Arsenic Adsorption and Its Species on Ferrihydrite and Ferrihydrite Colloid
Title of translation:&#27700;&#38081;&#30719;&#21450;&#20854;&#33014;&#20307;&#23545;&#30775;&#30340;&#21560;&#38468;&#19982;&#21560;&#38468;&#24418;&#24577;
Authors:Ma, Yu-Ling (1); Ma, Jie (1, 2); Chen, Ya-Li (1); Lei, Mei (3); Guo, Hua-Ming (4); Weng, Li-Ping (1); Li, Yong-Tao (1, 2) 
Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin; 300191, China; (2) College of Natural Resources and Environment, South China Agricultural University, Guangzhou; 510642, China; (3) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (4) School of Water Resources and Environment, China University of Geosciences, Beijing; 100083, China 
Corresponding author:Ma, Jie(majie@scau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:179-186
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Batch experiments were conducted to investigate the adsorption kinetics and adsorption isotherms of As(&#8546;) and As(&#8548;) on ferrihydrite and its colloid. A sequential extraction technique and As speciation extraction were used to assess the chemically bound fractions of As and As species in solids, respectively. The kinetic and isotherm data showed that the adsorption was multilevel and readily occurred. The adsorption of As(&#8546;) and As(&#8548;) on the ferrihydrite colloid was 194.8 g&bull;kg<sup>-1</sup> and 107. 3 g&bull;kg<sup>-1</sup>, respectively, which was higher than that on ferrihydrite (155.2 g&bull;kg<sup>-1</sup> and 104.4 g&bull;kg<sup>-1</sup>). The specifically adsorbed As, amorphous oxide bound As, and crystalline oxide bound As were the major fractions of adsorbed As on ferrihydrite and its colloid. The residual As was absorbed on the ferrihydrite surface instead of on the ferrihydrite colloid. Therefore, As adsorption on ferrihydrite was much stronger than that on ferrihydrite colloid. The ferrihydrite and ferrihydrite colloid could not reduce As(&#8548;) to As(&#8546;).<br/> &copy; 2018, Science Press. All right reserved.
Number of references:57
Main heading:Adsorption
Controlled terms:Adsorption isotherms - Arsenic - Crystalline materials - Extraction
Uncontrolled terms:Adsorption kinetics - Arsenic adsorption - Batch experiments - Crystalline oxides - Ferrihydrites - Fraction - Sequential extraction technique - Speciation
Classification code:802.3  Chemical Operations - 804  Chemical Products Generally - 933.1  Crystalline Solids
DOI:10.13227/j.hjkx.201706248

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 73>

Accession number:20183705802947
Title:Distribution Characteristics and Health Risk Assessment of Metals in Drinking Water Sources from the Luhun Reservoir
Title of translation:&#38470;&#27985;&#27700;&#24211;&#39278;&#29992;&#27700;&#28304;&#22320;&#27700;&#20307;&#20013;&#37329;&#23646;&#20803;&#32032;&#20998;&#24067;&#29305;&#24449;&#21450;&#20581;&#24247;&#39118;&#38505;&#35780;&#20215;
Authors:Yu, Cong-Cong (1); Zhao, Wei-Tuo (2); Gao, Xiao-Feng (3); Cheng, Sheng-Gao (1); Xie, Di (1); Ma, Peng-Tu (1) 
Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) Center of Environmental Engineering and Assessment, No. 203 Research Institute of Nuclear Industry, Xianyang; 712000, China; (3) Graduate School of Engineering, University of Tokyo, Tokyo; 113-8656, Japan 
Corresponding author:Zhao, Wei-Tuo(weituo2006@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:89-98
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to investigate the distribution characteristics and the human health risks of 12 metals in drinking water sources from the Luhun Reservoir, Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Mo, Ni, Pb, and Zn concentrations in 46 water samples collected from the reservoir in 2016 were measured and analyzed. The health risks caused by metals were assessed by using a human health risk assessment model. The results showed that the maximum concentration of Al (200.27 &mu;g&bull;L<sup>-1</sup>) and all concentrations of Mo (151.42-170.69 &mu;g&bull;L<sup>-1</sup>) in drinking water from the Luhun Reservoir exceeded the Environmental Quality Standards for Surface Water (GB 3838-2002) and Standards for Drinking Water Quality (GB 5749-2006) by 4.35% and 100%, respectively. A distinct spatial heterogeneity was found in the metal distribution, and the region with the highest metals concentrations was located southwest (upstream) and northeast (downstream) of the reservoir. The results of a health risk assessment indicated that children had greater health risks than adults. The health risks for metals through drinking were all higher than the values caused by dermal contact. Carcinogenic risks caused by Cr and As exceeded the maximum allowance levels (5&times;10<sup>-5</sup> a<sup>-1</sup>) by 100% and 3.80%, respectively, and Cr accounted for 85% of the total carcinogenic risks. The non-carcinogenic risks of the metals (10<sup>-12</sup>-10<sup>-7</sup> a<sup>-1</sup>) decreased in the order of Al&gt;Mo&gt;Cu&gt;Pb&gt;Ni&gt;Hg&gt;Fe&gt;Zn&gt;Mn, which had levels two to seven orders of magnitude lower than the maximum allowance levels.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:49
Main heading:Health risks
Controlled terms:Health - Manganese removal (water treatment) - Metals - Potable water - Reservoirs (water) - Risk assessment - Rivers - Water quality
Uncontrolled terms:Distribution characteristics - Drinking water sources - Environmental quality standards - Human health risk assessment - Maximum concentrations - Metals concentrations - Orders of magnitude - Spatial heterogeneity
Classification code:441.2  Reservoirs - 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
Numerical data indexing:Mass_Density 1.51e-04kg/m3 to 1.71e-04kg/m3, Mass_Density 2.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Percentage 3.80e+00%, Percentage 4.35e+00%, Percentage 8.50e+01%
DOI:10.13227/j.hjkx.201706022

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 74>

Accession number:20183705802948
Title:Distribution Characteristics and Health Risk Assessment of Antibiotics in the Water Supply System in Tianjin
Title of translation:&#22825;&#27941;&#20379;&#27700;&#31995;&#32479;&#20013;&#25239;&#29983;&#32032;&#20998;&#24067;&#21464;&#21270;&#29305;&#24449;&#19982;&#20581;&#24247;&#39118;&#38505;&#35780;&#20215;
Authors:Zhang, Xin-Bo (1, 2); Song, Zi (1); Zhang, Dan (1); Liu, Nan-Nan (1); Li, Nan (3); Wen, Hai-Tao (1, 2) 
Author affiliation:(1) Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin; 300384, China; (2) State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin; 300387, China; (3) College of Urban and Environmental Science, Northwest University, Xi'an; 710127, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:99-108
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Six groups of 10 antibiotics in the water plants and water supply network in Tianjin were sampled and analyzed by using solid phase extraction and high performance liquid chromatography-mass spectrometry. The concentrations of 10 antibiotics were detected in the water treatment process units, and the distribution, migration, and health risk assessment in the water supply networks were studied. The results of antibiotic determination in the water plants showed that the antibiotic concentrations were 0.96-126.43 ng&bull;L<sup>-1</sup>, and the removal efficiency was -46.47%-45.10% in plant A using traditional treatment processes. The coagulation treatment process was effective for the antibiotic removal in plant A. In plant B with an advanced treatment process, roxithromycin was not detected, and the concentration of other antibiotics was ND-72.27 ng&bull;L<sup>-1</sup>. The removal efficiency of the antibiotics was 40.25%-70.33% in plant B, which was remarkably higher than that in plant A. The results indicated the process of UV combined with chlorine disinfection played a major role in removing antibiotics in plant B. In addition, the antibiotic distribution in the water pipes indicated that the detection rate of roxithromycin was 75.0% and that for other antibiotics was 100.0%. The concentration of 10 antibiotics was ND-348.99 ng&bull;L<sup>-1</sup> and decreased gradually with the increase of the transmission distance, which followed the first order reaction kinetics model. Based on the Monte Carlo method, the carcinogenic and non-carcinogenic health risks of antibiotics in drinking water were assessed. The results displayed that both were at an acceptable level of risk.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:43
Main heading:Chemicals removal (water treatment)
Controlled terms:Antibiotics - Chemical water treatment - Efficiency - Health - Health risks - High performance liquid chromatography - Mass spectrometry - Monte Carlo methods - Phase separation - Potable water  - Reaction kinetics - Risk assessment - Water pipelines - Water supply - Water supply systems
Uncontrolled terms:Antibiotic concentration - Distribution and migration - Distribution characteristics - High performance liquid chromatography-mass spectrometries - Removal efficiencies - Solid-phase extraction - Transmission distances - Water treatment process
Classification code:444  Water Resources - 446.1  Water Supply Systems - 461.6  Medicine and Pharmacology - 461.7  Health Care - 801  Chemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 913.1  Production Engineering - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Mass_Density 9.60e-10kg/m3 to 1.26e-07kg/m3, Percentage -4.65e+01% to 4.51e+01%, Percentage 1.00e+02%, Percentage 4.02e+01% to 7.03e+01%, Percentage 7.50e+01%
DOI:10.13227/j.hjkx.201706245

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 75>

Accession number:20183705802950
Title:Health Risk Evaluation of Organochlorine and Organophosphorous Pesticides in Groundwater in Beijing
Title of translation:&#21271;&#20140;&#24066;&#22320;&#19979;&#27700;&#26377;&#26426;&#27695;&#21644;&#26377;&#26426;&#30967;&#20892;&#33647;&#20581;&#24247;&#39118;&#38505;&#35780;&#20215;
Authors:Chen, Wei-Ping (1); Peng, Cheng-Wei (1, 2); Yang, Yang (1, 2); Wu, Yu-Mei (3) 
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) Monitoring Center of Beijing Water Environment, Beijing; 100038, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:117-122
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Pollution from organochlorine (OCP) and organophosphorus (OPP) pesticides in groundwater is a key issue for water resource protection. Sixteen kinds of OCP and six kinds of OPP pesticides were detected in 18 groundwater samples determined by GC-MS. Results showed that seven kinds of OPCs and two kinds of OPPs were found in the groundwater in Beijing. Among the OCPs, there were mainly hexachlorobenzene (HCB), hemochromatosis (HCH), and dichlorodiphenyltrichloroethane (DDT), with maximum values of, respectively, 82.4, 193, and 158 ng&bull;L<sup>-1</sup>. Among the OPPs, there were o, o-dimethyl-o-2, 2-dichlorovinylphosphate and o, o-dimethyl methylcarbamoylmethyl phosphorodithioate, with maximum values of 7.1 ng&bull;L<sup>-1</sup> and 17.7 ng&bull;L<sup>-1</sup>, respectively. The OCPs and OPPs were found in the sewage irrigation areas. The results of a probabilistic risk assessment showed that the non-carcinogenic and carcinogenic risks of OCPs and OPPs within the drinking water in Beijing had been controlled, that risks from OCPs were higher, and that women were more sensitive to the toxicity of the pesticides. The monitoring of HCH and DDT in the groundwater should be implemented.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:23
Main heading:Risk assessment
Controlled terms:Fertilizers - Groundwater - Groundwater pollution - Groundwater resources - Health risks - Intelligent systems - Irrigation - Monte Carlo methods - Pesticides - Potable water  - Sewage - Silicon compounds - Toxicity
Uncontrolled terms:Carcinogenic risk - Dichlorodiphenyltrichloroethane - Hexachlorobenzene - Organochlorine pesticides - Organophosphorous pesticides - Probabilistic Risk Assessment - Sewage irrigation - Water resource protection
Classification code:444  Water Resources - 444.2  Groundwater - 452.1  Sewage - 461.7  Health Care - 723.4  Artificial Intelligence - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 821.3  Agricultural Methods - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Mass_Density 1.58e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 1.77e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 7.10e-09kg/m3 to 2.20e-02kg/m3
DOI:10.13227/j.hjkx.201705130

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 76>

Accession number:20183705802944
Title:Remote Sensing Identification of Urban Black-Odor Water Bodies Based on High-Resolution Images: A Case Study in Nanjing
Title of translation:&#22522;&#20110;&#39640;&#20998;&#24433;&#20687;&#30340;&#22478;&#24066;&#40657;&#33261;&#27700;&#20307;&#36965;&#24863;&#35782;&#21035;: &#20197;&#21335;&#20140;&#20026;&#20363;
Authors:Wen, Shuang (1); Wang, Qiao (2); Li, Yun-Mei (1); Zhu, Li (2); L&uuml;, Heng (1); Lei, Shao-Hua (1); Ding, Xiao-Lei (1); Miao, Song (1) 
Author affiliation:(1) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing Normal University, Nanjing; 210023, China; (2) Satellite Environment Application Center, Ministry of Environmental Protection, Beijing; 100029, China 
Corresponding author:Li, Yun-Mei(liyunmei@njnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:57-67
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The identification of urban black-odor water bodies plays an important role in monitoring and controlling black-odor water bodies. In 2016, a ground survey was conducted on the urban reach of Nanjing, and 55 samples from the West Shazhou River, Tuwei River, Xuanwu Lake, and Jinchuan River were obtained. The spectral characteristics of urban black-odor water bodies and other water bodies were analyzed. Recognition algorithms for GF-2 data were proposed in order to analyze the spatial distribution and environmental factors of urban black-odor water bodies. These algorithms were single-band thresholds based on reflectance of the green band, the difference between the blue band and green band, the ratio of the green band and red band, and the chromaticity value. The results indicate that: &#9312; compared with other types of water, the urban black-odor water has the smallest spectral slope in the range of 400-500 nm and lowest reflectivity, and the peaks and valleys are not prominent in the whole visible range; &#9313; based on the verification, the accuracy of the ratio algorithm is the highest; and &#9314; using the ratio algorithm to calculate the GF-2 data of November 3, 2016, a total of 11 black river sections are identified. The entire length is 40.7 km, and the area is 0.749 km<sup>2</sup>. The black-odor water sections are distributed over a wide range but are not continuous, and they are concentrated in the densely populated areas. Domestic sewage, industrial waste water, and broken river channel are the main reasons.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:Remote sensing
Controlled terms:Reflection - Rivers - Sewage
Uncontrolled terms:Black-odor waters - GF-2 - Nanjing - Recognition algorithm - Spectra characteristic
Classification code:452.1  Sewage
Numerical data indexing:Area 7.49e+05m2, Size 4.00e-07m to 5.00e-07m, Size 4.07e+04m
DOI:10.13227/j.hjkx.201703264

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 77>

Accession number:20183705802878
Title:Seasonal and Spatial Variations of Microcystins and Their Relationships with Physiochemical and Biological Factors in Poyang Lake
Title of translation:&#37169;&#38451;&#28246;&#24494;&#22218;&#34299;&#27602;&#32032;&#26102;&#31354;&#20998;&#24067;&#26684;&#23616;&#21450;&#20854;&#19982;&#29702;&#21270;&#21644;&#29983;&#29289;&#22240;&#23376;&#30340;&#20851;&#31995;
Authors:Yuan, Li-Juan (1); Liao, Qie-Gen (1); Zhang, Li (1); Zhang, Da-Wen (1); Luo, Lin-Guang (1); Liu, Ju-Tao (2) 
Author affiliation:(1) Institute for Quality &amp; Safety and Standards of Agricultural Products Research, Jiangxi Academy of Agricultural Sciences, Nanchang; 330200, China; (2) Jiangxi Provincial Institute of Water Sciences, Nanchang; 330029, China 
Corresponding author:Zhang, Da-Wen(zdw3296@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:450-459
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Poyang Lake is the largest freshwater lake in China and an important drinking water source for Jiangxi Province. Since the year 2000, toxic cyanobacteria have been observed frequently in Poyang Lake. In this study, water samples were collected in the lake quarterly (April 2012, August 2012, October 2012, and January 2013) to examine the spatial and seasonal variations in the concentrations of microcystins (MCs; MC-RR, -YR, and -LR) and their relationships with physiochemical and biological factors. MCs were determined by ultra-high-performance liquid chromatography-electrospray ionization tandem triple quadrupole/mass spectrometry (UPLC-MS/MS). MC-RR (accounting for 75.01% and 71.34% of intracellular MC (IMC) and extracellular MC (EMC) concentrations, respectively) was the most dominant variant in Poyang Lake, followed by MC-LR (accounting for 21.95% and 24.97% of IMC and EMC concentrations, respectively), while MC-YR was detected in low concentrations (accounting for 3.01% and 3.69% of IMC and EMC concentrations, respectively). Total MC concentrations (IMC + EMC, TMC) ranged from 0.49 to 3 517.85 ng&bull;L<sup>-1</sup>, with an average of 337.43 ng&bull;L<sup>-1</sup> and only 2.53% (2 out of 79 water samples) of the water samples contained MCs concentrations exceeding the drinking water guideline level of 1 ng&bull;L<sup>-1</sup> for MC-LR proposed by World Health Organization (WHO). IMC concentrations showed significant relationships with Microcystis biomass (r=0.47, P&lt;0.01), Oscillatoria biomass (r=0.68, P&lt;0.01), Cyanobacteria biomass (r=0.56, P&lt;0.01), and Chl-a (r=0.28, P&lt;0.01), but no significant correlation was found between intracellular MC concentration and Anabena biomass (P&gt;0.05), suggesting that Microcystis and Oscillatoria might be the main MCs-producing cyanobacteria in Poyang Lake. In addition, IMC concentrations were positively correlated with water temperature (r=0.51, P&lt;0.01), transparence (r=0.69, P&lt;0.01), Fe (r=0.43, P&lt;0.01), and Zn contents (r=0.43, P&lt;0.01), and negatively correlated with TN (r=-0.44, P&lt;0.01), TP (r=-0.29, P&lt;0.01), NH<inf>4</inf><sup>+</sup>-N (r=-0.33, P&lt;0.05), NO<inf>2</inf><sup>-</sup>-N (r=-0.28, P&lt;0.05), Ca (r=-0.34, P&lt;0.01), and Mg(r=-0.35, P&lt;0.05), while no significant correlations were observed between IMC concentrations and pH, PO<inf>4</inf><sup>3-</sup>-P, NO<inf>3</inf><sup>-</sup>-N, electrical conductivity, permanganate index, and Cu content (P&gt;0.05). These results indicated that light intensity (represented by transparence), nitrogen, phosphorus, and water temperature might be the regulating factors of MCs production in Poyang Lake and trace elements (Fe, Zn, Ca, and Mg) can influence the MC production to a certain extent. IMCs and EMCs exhibited similar seasonal variations in Poyang Lake. The highest values of IMCs (531.87 ng&bull;L<sup>-1</sup>) and EMCs (232.44 ng&bull;L<sup>-1</sup>) were observed in summer. The concentrations of IMCs and EMCs in autumn were 31.97 ng&bull;L<sup>-1</sup> and 6.49 ng&bull;L<sup>-1</sup>, respectively. Low concentrations were observed in spring (0.55 ng&bull;L<sup>-1</sup> and 0.88 ng&bull;L<sup>-1</sup> of IMCs and EMCs, respectively) and winter (0.69 ng&bull;L<sup>-1</sup> and 4.14 ng&bull;L<sup>-1</sup> of IMCs and EMCs, respectively). The highest IMCs and EMCs values of Poyang Lake in summer were 2298.08 ng&bull;L<sup>-1</sup> and 1219.77 ng&bull;L<sup>-1</sup>, respectively, and the lowest values were 92.53 ng&bull;L<sup>-1</sup> and 38.80 ng&bull;L<sup>-1</sup>, respectively. Overall, the concentrations of IMCs in eastern bays, the vicinity of Songmen Mountain, Banghu Lake, and its outlet were higher than those in other regions. However, the spatial distributions of EMCs in Poyang Lake were different from those of IMCs. EMCs concentrations in the vicinity of Songmen Mountain, Banghu Lake, and its outlet were higher than those in other regions.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:Lakes
Controlled terms:Biomass - Electromagnetic compatibility - Electrospray ionization - Enzyme activity - High performance liquid chromatography - Potable water - Spatial distribution - Temperature - Trace elements - Transparency
Uncontrolled terms:Drinking water sources - Electrical conductivity - Microcystins - Po-yang lakes - Seasonal variation - Ultra-high performance liquid chromatographies - Water temperatures - World Health Organization
Classification code:444  Water Resources - 461.9  Biology - 641.1  Thermodynamics - 711.1  Electromagnetic Waves in Different Media - 741.1  Light/Optics - 801  Chemistry - 921  Mathematics
Numerical data indexing:Mass_Density 1.00e-09kg/m3 to 2.20e-02kg/m3, Mass_Density 1.22e-06kg/m3 to 2.20e-02kg/m3, Mass_Density 2.30e-06kg/m3 to 2.20e-02kg/m3, Mass_Density 2.32e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 3.20e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 3.37e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 3.88e-08kg/m3 to 2.20e-02kg/m3, Mass_Density 4.14e-09kg/m3 to 2.20e-02kg/m3, Mass_Density 5.18e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 5.32e-07kg/m3 to 2.20e-02kg/m3, Mass_Density 5.50e-10kg/m3 to 2.20e-02kg/m3, Mass_Density 6.49e-09kg/m3 to 2.20e-02kg/m3, Mass_Density 6.90e-10kg/m3 to 2.20e-02kg/m3, Mass_Density 8.80e-10kg/m3 to 2.20e-02kg/m3, Mass_Density 9.25e-08kg/m3 to 2.20e-02kg/m3, Percentage 2.19e+01%, Percentage 2.50e+01%, Percentage 3.01e+00%, Percentage 3.69e+00%, Percentage 7.13e+01%, Percentage 7.50e+01%
DOI:10.13227/j.hjkx.201708227

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 78>

Accession number:20183705802938
Title:Variation of O<inf>3</inf> Concentration in Different Regions of Beijing from 2006-2015
Title of translation:2006~2015&#24180;&#21271;&#20140;&#24066;&#19981;&#21516;&#22320;&#21306;O<inf>3</inf>&#27987;&#24230;&#21464;&#21270;
Authors:Wang, Zhan-Shan (1, 2); Li, Yun-Ting (1, 2); An, Xin-Xin (1, 2); Li, Qian (1, 2); Sun, Nai-Di (1, 2); Wang, Bu-Ying (1, 2); Pan, Jin-Xiu (1, 2) 
Author affiliation:(1) Beijing Municipal Environmental Monitoring Center, Beijing; 100048, China; (2) Beijing Key Laboratory of Atmospheric Particulate Monitoring Technology, Beijing; 100048, China 
Corresponding author:Li, Yun-Ting(lee_yunting@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:1-8
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:O<inf>3</inf> continuous monitoring data for the Dingling, Guanyuan, Liulihe, and Qianmen sites from 2006-2015 were analyzed to investigate concentration levels, variation trends, temporal variations, and relationships with precursors and meteorological factors. The results showed that the ten year average concentrations of O<inf>3</inf> at the Dingling site were the highest at 65.2 &mu;g&bull;m<sup>-3</sup>, followed by concentrations at Liulihe (53.4 &mu;g&bull;m<sup>-3</sup>), Guanyuan (49.6 &mu;g&bull;m<sup>-3</sup>) and Qianmen (40.4 &mu;g&bull;m<sup>-3</sup>). The O<inf>3</inf> concentrations at Dingling showed a decreasing trend [0.5 &mu;g&bull;(m<sup>3</sup>&bull;a)<sup>-1</sup>], while O<inf>3</inf> concentrations at Guanyuan [0.9 &mu;g&bull;(m<sup>3</sup>&bull;a)<sup>-1</sup>], Liulihe [0.3 &mu;g&bull;(m<sup>3</sup>&bull;a)<sup>-1</sup>], and Qianmen [0.3 &mu;g&bull;(m<sup>3</sup>&bull;a)<sup>-1</sup>] showed an increasing trend. The highest monthly average concentrations appeared during June and August, and the highest frequency occurred in July (17 times) with average concentrations of 99.8 &mu;g&bull;m<sup>-3</sup>. The lowest monthly average concentrations appeared during November and February, and the highest frequency occurred in January (14 times) with an average concentration of 16.6 &mu;g&bull;m<sup>-3</sup>. Notably, the time for the peak concentrations of O<inf>3</inf> appeared earlier in the day in recent years. The peak concentrations of O<inf>3</inf> appeared at 15: 00-16: 00 during 2013-2015, which was 1-2 hours earlier than previous years. The heavy air pollution of O<inf>3</inf> occurred on 11 days at the Dingling site in 2015, which was ten days more than in 2013, indicating O<inf>3</inf> pollution in the downwind suburban regions of Beijing in summer became more and more serious. The concentrations of O<inf>3</inf> and NO<inf>2</inf> at Dingling showed a positive correlation, while the concentrations of O<inf>3</inf>and NO<inf>2</inf> at the other sites showed a negative correlation, indicating O<inf>3</inf> formation in Dingling was sensitive to NO<inf>2</inf> chemistry, while O<inf>3</inf> formation at the other sites was sensitive to VOC chemistry. The concentrations of O<inf>3</inf> showed a positive correlation with temperature and negative correlations with humidity and surface pressure. Temperature had the greatest influence on O<inf>3</inf> concentration, followed by surface pressure and humidity. For cases when daily maximum temperature exceeded 30&#8451; and relative humidity was between 30% and 70%, the probability of the O<inf>3</inf> daily maximum 8 h concentration exceeding 200 &mu;g&bull;m<sup>-3</sup> was high, indicating the air quality level reached levels for light pollution and moderate pollution.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:21
Main heading:Nitrogen oxides
Controlled terms:Air quality
Uncontrolled terms:Beijing - Long-term - Meteorological condition - Ozone precursors - Precursor
Classification code:451.2  Air Pollution Control - 804.2  Inorganic Compounds
Numerical data indexing:Age 3.01e-02yr, Percentage 3.00e+01% to 7.00e+01%, Time 2.88e+04s, Time 3.60e+03s to 7.20e+03s
DOI:10.13227/j.hjkx.201705276

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 79>

Accession number:20183705802879
Title:Distribution of Multidrug-Resistant Bacteria and Antibiotic-Resistant Genes in Livestock Manures
Title of translation:&#30044;&#31165;&#31914;&#20415;&#20013;&#22810;&#37325;&#32784;&#33647;&#32454;&#33740;&#21450;&#32784;&#33647;&#22522;&#22240;&#30340;&#20998;&#24067;&#29305;&#24449;
Authors:Zhang, Hao (1, 2, 3); Wang, Pan-Liang (2, 3); Yang, Qing-Xiang (1, 2, 3); Yu, Ning (4) 
Author affiliation:(1) School of Environment, Henan Normal University, Xinxiang; 453007, China; (2) College of Life Sciences, Henan Normal University, Xinxiang; 453007, China; (3) Key Laboratory for Microorganisms and Functional Molecules, Henan Normal University, University of Henan Province, Xinxiang; 453007, China; (4) Environmental Monitoring Station of Xinxiang City, Xinxiang; 453007, China 
Corresponding author:Yang, Qing-Xiang(yangqx@htu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:460-466
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In the present study, techniques for microbial culture enumeration, 16S rDNA gene sequencing for bacterial identification, high-throughput sequencing for the multidrug-resistant bacteria (MRB) communities, and high-throughput quantitative PCR detection for the prevalence and abundance of antibiotic resistance genes (ARGs) were conducted to investigate the distribution characteristics of MRB and ARGs in chicken and swine manures. The results showed that the rates of MRB that were resistant to tetracycline, ciprofloxacin, and gentamycin simultaneously were from 7.96% to 12.40% for the different manure samples. The dominant genera of cultivable MRB were Escherichia, Acinetobacter, and Proteus, both in the chicken and swine manures. High-throughput quantitative PCR results indicated that, compared to the antibiotic free swine manure, the total enrichment of ARGs increased by 1.96&times;10<sup>4</sup>-1.54&times;10<sup>5</sup> times that in the swine manure samples, with different antibiotics following the sequence of tetracyclines&gt;&beta;-lactams&gt;MLSB (macrolide, lincosamide, and streptogramin B)&gt;aminoglycosides&gt;FCA (fluoroquinolone, quinolone, florfenicol, chloramphenicol, and amphenicol)&gt;sulfonamides&gt;vancomycins.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:47
Main heading:Genes
Controlled terms:Agriculture - Amides - Animals - Antibiotics - Bacteria - Fertilizers - Manures - Polymerase chain reaction - Sulfur compounds - Throughput
Uncontrolled terms:Antibiotic-resistant genes - Genetic elements - Livestock manure - Multidrug resistants - Quantitative PCR
Classification code:461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 801.2  Biochemistry - 804  Chemical Products Generally - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5  Agricultural Wastes
Numerical data indexing:Percentage 7.96e+00% to 1.24e+01%
DOI:10.13227/j.hjkx.201705169

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 80>

Accession number:20183705802875
Title:Effect of Nitrate Amendment on Soil Denitrification Activity and Anthracene Anaerobic Degradation
Title of translation:&#30813;&#37240;&#30416;&#23545;&#22303;&#22756;&#21453;&#30813;&#21270;&#27963;&#24615;&#21450;&#33981;&#21388;&#27687;&#38477;&#35299;&#30340;&#24433;&#21709;
Authors:Dai, Jun-Shuai (1); Zuo, Xiao-Hu (1); Wang, Ming-Xia (1); Yao, Yan-Hong (1); Zhou, Zhi-Feng (1) 
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China 
Corresponding author:Zhou, Zhi-Feng(zhouzhf@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:422-429
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The degradation of soil polycyclic aromatic hydrocarbons (PAHs) under denitrification is one of the most important pathways for anaerobic PAH elimination, but little is known about the effect of nitrate (the terminal electron acceptor for denitrification) on soil denitrification activity and PAH degradation under anaerobic conditions. In this study, the effect of nitrate on soil anthracene anaerobic degradation and denitrification activity was investigated through an anaerobic microcosm experiment. Two groups of treatments without (N<inf>0</inf>) and with (N<inf>30</inf>) nitrate (30 mg&bull;kg<sup>-1</sup>) amendment were conducted. Each group contained three treatments with different anthracene concentrations (0, 15, and 30 mg&bull;kg<sup>-1</sup>, denoted as A<inf>0</inf>, A<inf>15</inf>, and A<inf>30</inf>, respectively). Therefore, a total of six treatments (N<inf>0</inf>A<inf>0</inf>, N<inf>0</inf>A<inf>15</inf>, N<inf>0</inf>A<inf>30</inf>, N<inf>30</inf>A<inf>0</inf>, N<inf>30</inf>A<inf>15</inf>, and N<inf>30</inf>A<inf>30</inf>) were incubated in darkness at 25&#8451; for 45 days, and the production rates of N<inf>2</inf>O and CO<inf>2</inf>, abundances of denitrification related genes (narG: periplasmic nitrate reductase gene; nirK: copper-containing nitrite reductase gene; and nirS: cd<inf>1</inf>-nitrite reductase gene), and soil anthracene content were measured at 3, 7, 14, and 45 days. The results indicated that the intensive denitrification enzyme activity in each treatment was only detected at day 3, which could be significantly enhanced by both nitrate and anthracene amendments. Subsequently, a sharp decline of denitrification enzyme activity was observed in each treatment, while anthracene showed an obvious inhibition of soil denitrification enzyme activity. The result of a two-way ANOVA also indicated that nitrate, anthracene, and their interactions had significant effects on soil denitrification enzyme activity. The result of a quantitative-PCR indicated that, during the incubation, the abundances of narG and nirS exhibited an increasing tendency, but the abundance of nirK was relatively constant compared with its former counterparts. The final removal rate of anthracene under anaerobic soil environment was in the range of 33.83%-55.01%, and neither the final removal rate nor the degradation rate of anthracene could be significantly affected by nitrate amendment during incubation. The anthracene degradation rates in the higher anthracene containing treatments (N<inf>0</inf>A<inf>30</inf> and N<inf>30</inf>A<inf>30</inf>) were significantly higher than those in the lower anthracene containing treatments (N<inf>0</inf>A<inf>15</inf> and N<inf>30</inf>A<inf>15</inf>). In summary, nitrate amendments had no effect on soil anthracene anaerobic degradation but could significantly affect soil denitrification enzyme activity and the abundance of denitrification related narG and nirS genes.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Enzyme activity
Controlled terms:Anthracene - Degradation - Denitrification - Enzyme inhibition - Genes - Nitrates - Polymerase chain reaction - Soils
Uncontrolled terms:Anaerobic degradation - Anaerobic incubation - Denitrification enzyme activities - Microcosm experiments - Nitrite reductase genes - Periplasmic nitrate reductase - Polycyclic aromatic hydrocarbons (PAHS) - Terminal electron acceptors
Classification code:461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 483.1  Soils and Soil Mechanics - 801.2  Biochemistry - 802.2  Chemical Reactions - 804.1  Organic Compounds - 804.2  Inorganic Compounds
Numerical data indexing:Age 1.23e-01yr, Percentage 3.38e+01% to 5.50e+01%
DOI:10.13227/j.hjkx.201706267

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 81>

Accession number:20183705802969
Title:Effects of Nanoscale Zero-valent Iron (nZVI) on Denitrifying Performance of an Upflow Granular Sludge Bed Reactor
Title of translation:&#32435;&#31859;&#38646;&#20215;&#38081;&#23545;&#21319;&#27969;&#24335;&#39063;&#31890;&#27745;&#27877;&#24202;&#21453;&#30813;&#21270;&#24615;&#33021;&#30340;&#24433;&#21709;
Authors:Zhou, Feng (1); Wang, Fan-Fan (1); Qian, Fei-Yue (1, 2, 3); Huang, Hui-Min (1); Shen, Yao-Liang (1, 2, 3); Zhou, Jian-Min (1) 
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 Resource Utilization Technology of Municipal Sewage, Suzhou; 215009, China; (3) Jiangsu Key Laboratory of Environmental Science and Engineering, Suzhou; 215009, China 
Corresponding author:Qian, Fei-Yue(feiyuechandler@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:263-268
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to examine the effects of nanoscale zero-valent iron (nZVI) on the performance of denitrifying granular sludge (DGS) in a continuous flow model, the variations of nitrogen removal efficiency in the reactor, sludge morphology, and denitrifying characteristics at different influent nZVI concentrations were investigated in an upflow sludge bed (USB). The results showed that nZVI concentrations lower than 5 mg&bull;L<sup>-1</sup> did not influence the nitrogen removal performance of the reactor significantly, and the activity of DGS was improved slightly. When the influent nZVI concentration was in the range of 5 to 10 mg&bull;L<sup>-1</sup>, the DGS could adapt to the biological inhibition of nZVI partially, with the increase of sludge concentration and grain size. However, the higher total iron contents in the sludge resulted in the lower denitrifying activity of the DGS. The removal efficiencies of COD and NO<inf>3</inf><sup>-</sup>-N in the reactor decreased to 23.3% and 20.3%, respectively, at the influent nZVI concentration of 30 mg&bull;L<sup>-1</sup>. Moreover, the DGS was a dark color and of a smaller grain size because of the adsorption of a large amount of nZVI, while the microbe density, such as that of the bacillus species, on the granule surface decreased significantly. In the recovery phase, the nitrogen removal performance of the reactor could almost reach its initial level at nZVI=0 mg&bull;L<sup>-1</sup> during an operation of 20 days due to the fast growth of heterotrophic microbes on the surface of the DGS.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Nitrogen removal
Controlled terms:Bacteria - Bacteriology - Denitrification - Efficiency - Grain size and shape - Granular materials - Iron - Nanotechnology
Uncontrolled terms:Denitrifying - Denitrifying activity - Granular sludge - Nano-scale zero valent irons - Nanoscale zero-valent iron - Nitrogen removal efficiency - Removal efficiencies - Upflow sludge bed
Classification code:545.1  Iron - 761  Nanotechnology - 802.2  Chemical Reactions - 913.1  Production Engineering - 951  Materials Science
Numerical data indexing:Age 5.48e-02yr, Mass_Density 3.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-03kg/m3 to 1.00e-02kg/m3, Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 2.03e+01%, Percentage 2.33e+01%
DOI:10.13227/j.hjkx.201706177

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 82>

Accession number:20183705802960
Title:Pollution Characteristics of Parabens in Typical Sewage Wastewater
Title of translation:&#20856;&#22411;&#22478;&#24066;&#27745;&#27700;&#20013;&#23545;&#32671;&#22522;&#33519;&#30002;&#37240;&#37231;&#30340;&#27745;&#26579;&#29305;&#24449;
Authors:Zhao, Xue (1); Zhang, Zi-Feng (1); Zhu, Fu-Jie (1); Li, Yi-Fan (1); Ma, Wan-Li (1) 
Author affiliation:(1) International Joint Research Center for Persistent Toxic Substances, State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin; 150090, China 
Corresponding author:Ma, Wan-Li(ijrc_pts_paper@yahoo.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:195-201
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Parabens are widely used in foodstuffs, cosmetics, and pharmaceuticals as preservatives, fungicides, and bactericides. Recent studies showed that these compounds could be detected in surface water and are a potential hazard to the aquatic ecological environment. In this study, 24-hour influent samples were collected from a typical sewage wastewater treatment plant in Harbin in autumn and winter in 2016. The concentrations of six parabens and four normal water quality parameters were analyzed. The results indicated that parabens were frequently detected in the influent, and MeP, EtP, and PrP were the predominant compounds. Significant correlations were found between TOC, TDS, pH, and the concentration of parabens. The concentration of parabens in the influent of the sewage wastewater treatment plant have obvious daily variations rather than seasonal variations. The results provide an important theoretical basis for further research and pollution control of parabens in sewage wastewater treatment system.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Wastewater treatment
Controlled terms:Parabens - Phosphorus compounds - Pollution control - Praseodymium compounds - Reclamation - River pollution - Sewage - Sewage pumping plants - Surface waters - Water quality  - Water treatment plants
Uncontrolled terms:Daily variations - Ecological environments - Potential hazards - Residue characteristic - Seasonal variation - Wastewater treatment plants - Wastewater treatment system - Water quality parameters
Classification code:444.1  Surface Water - 445.1  Water Treatment Techniques - 445.2  Water Analysis - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 453  Water Pollution - 804  Chemical Products Generally
Numerical data indexing:Time 8.64e+04s
DOI:10.13227/j.hjkx.201703255

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 83>

Accession number:20183705802976
Title:Effect of Organic Manure Substitution of Synthetic Nitrogen on Crop Yield and N<inf>2</inf>O Emission in the Winter Wheat-Summer Maize Rotation System
Title of translation:&#26377;&#26426;&#27694;&#26367;&#20195;&#27604;&#20363;&#23545;&#20908;&#23567;&#40614;/&#22799;&#29577;&#31859;&#36718;&#20316;&#20307;&#31995;&#20316;&#29289;&#20135;&#37327;&#21450;N<inf>2</inf>O&#25490;&#25918;&#30340;&#24433;&#21709;
Authors:Hou, Miao-Miao (1); L&uuml;, Feng-Lian (1); Zhang, Hong-Tao (1); Zhou, Ying-Tian (1); Lu, Guo-Yan (1); Muhammad, Ayaz (1); Li, Qing-Hui (2); Yang, Xue-Yun (1); Zhang, Shu-Lan (1) 
Author affiliation:(1) Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Yangling; 712100, China; (2) Shaanxi Station of Soil and Fertilizer, Xi'an; 710003, China 
Corresponding author:Zhang, Shu-Lan(zhangshulan@nwafu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:321-330
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Controlling agricultural greenhouse gas emissions, such as N<inf>2</inf>O, is important in mitigating global climate warming. Through monitoring the dynamics of N<inf>2</inf>O emission fluxes, we investigated the effect of organic nitrogen (N) substitution of synthetic N on N<inf>2</inf>O emissions and the yield of winter wheat and summer maize in the Guanzhong Plain of Shaanxi Province, China. The study involved six treatments, consisting of no fertilizer (CK), synthetic N, phosphorus (P), and potassium (K) fertilizers alone (NPK), 75% NPK+25% organic N through manure (25%M), 50% NPK+50% organic N (50%M), 25% NPK+75% organic N (75%M), 100% organic N (100%M). The results showed that the peak value of the N<inf>2</inf>O emission flux appeared after fertilization, rainfall, and irrigation. In the wheat season, the emission flux of N<inf>2</inf>O varied from -1.33 to 144.2 &mu;g&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>, with the highest peak value in the NPK treatment. In the maize season, the emission flux of N<inf>2</inf>O varied from 88.2 to 1 800.1 &mu;g&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>, and the 50%M treatment showed the highest peak value. The range in the total amount of N<inf>2</inf>O emissions from the different treatments in the wheat-maize rotation system was 429.8-2 632.1 g&bull;hm<sup>-2</sup>, and the amount for the treatments decreased in order as follows: 50%M&gt;25%M&gt;NPK&gt;75%M&gt;100%M&gt;CK. The yields of wheat, maize, or wheat plus maize were significantly higher in the fertilized treatments compared to the CK. Organic substitution treatments significantly increased wheat yield by 26.1% to 50.0% relative to the NPK treatment. While the maize yield in 50%M and 75%M treatments was similar to that in the NPK treatment, the 25%M and 100%M treatments showed significantly lower yields than with the NPK treatment. The total yield of wheat plus maize varied from 9 166 to 17 496 kg&bull;hm<sup>-2</sup>, of which total yield was significantly higher with 50%M and 75%M compared to NPK. Overall, the 75%M treatment is the best measure to guarantee crop yield and to reduce N<inf>2</inf>O emissions in the wheat-maize rotation system based on a one year study in the Guanzhong plain of Shaanxi Province.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:43
Main heading:Fertilizers
Controlled terms:Crops - Gas emissions - Greenhouse gases - Manures
Uncontrolled terms:Emission coefficient - Emission fluxes - Organic nitrogen - Summer maize - Yield
Classification code:451.1  Air Pollution Sources - 804  Chemical Products Generally - 821.4  Agricultural Products - 821.5  Agricultural Wastes
Numerical data indexing:Percentage 1.00e+02%, Percentage 2.50e+01%, Percentage 2.61e+01% to 5.00e+01%, Percentage 5.00e+01%, Percentage 7.50e+01%
DOI:10.13227/j.hjkx.201707010

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 84>

Accession number:20183705802963
Title:Operation of the AAO Process Under Low Dissolved Oxygen Conditions and Its Simulation
Title of translation:AAO&#24037;&#33402;&#20302;&#27687;&#26465;&#20214;&#19979;&#30340;&#36816;&#34892;&#21450;&#20854;&#27169;&#25311;
Authors:Cao, Te-Te (1); Wang, Lin (1); Li, Yong-Mei (1) 
Author affiliation:(1) State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China 
Corresponding author:Li, Yong-Mei(liyongmei@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:219-226
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The anaerobic-anoxic-oxic (AAO) process was used to investigate the variation of the parameters of water quality when the dissolved oxygen (DO) in the aerobic tank was controlled at a low concentration. The results indicated the system still had good phosphorus and nitrogen removal efficiencies when the DO concentration in the aerobic tank was decreased from 2.00 mg&bull;L<sup>-1</sup> to 1.00 mg&bull;L<sup>-1</sup> and 0.50 mg&bull;L<sup>-1</sup>, and the effluent indexes could meet the first class A standard for the "discharge standard of pollutants for municipal wastewater treatment plant" (GB18918-2002) of China. The activated sludge model of the AAO process was developed by BioWin 4.1 software. The sensitivities of the model parameters were analyzed, and the model parameters, such as amount of polyhydroxyalkanoate (PHA) stored per unit of acetate or the propionate sequestered by phosphorus accumulating bacteria (Y<inf>P/PHA, seq</inf>), the amount of phosphorus stored per unit of PHA oxidized in aerobic conditions by phosphorus accumulating bacteria (Y<inf>P/PHA, aerobic</inf>), the maximum specific growth rate of ammonia oxidizing bacteria (&mu;<inf>max, A</inf>), and the maximum specific growth rate of nitrite oxidizing bacteria (&mu;<inf>max, N</inf>), were calibrated and validated by the dynamic simulation. In addition, the energy consumption of the aeration was simulated and evaluated. The results showed that when the DO concentration in the aerobic tank was decreased from 2.00 mg&bull;L<sup>-1</sup> to 1.00 mg&bull;L<sup>-1</sup> and 0.50 mg&bull;L<sup>-1</sup>, the air flow could be reduced by 23.8% and 38.1%, and the oxygen transfer efficiency could be increased by 7. 2% and 11.7%, respectively.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:24
Main heading:Dissolved oxygen
Controlled terms:Activated sludge process - Aerobic bacteria - Ammonia - Effluent treatment - Effluents - Energy utilization - Nitrogen removal - Phosphorus - Quality control - Tanks (containers)  - Volatile fatty acids - Wastewater treatment - Water quality
Uncontrolled terms:Ammonia oxidizing bacteria - DO concentration - Maximum specific growth rates - Municipal wastewater treatment plants - Nitrite-oxidizing bacteria - Oxygen transfer efficiency - Phosphorus and nitrogen removal - Simulation
Classification code:445.2  Water Analysis - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 461  Bioengineering and Biology - 525.3  Energy Utilization - 619.2  Tanks - 804  Chemical Products Generally - 913.3  Quality Assurance and Control
Numerical data indexing:Mass_Density 2.00e-03kg/m3 to 1.00e-03kg/m3, Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 1.17e+01%, Percentage 2.00e+00%, Percentage 2.38e+01%, Percentage 3.81e+01%
DOI:10.13227/j.hjkx.201704132

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 85>

Accession number:20183705802964
Title:Inhibitory Effects of Phosphate and Recovery on a Nitrification System
Title of translation:&#30967;&#37240;&#30416;&#23545;&#20122;&#30813;&#21270;&#31995;&#32479;&#30340;&#25233;&#21046;&#21450;&#24674;&#22797;
Authors:Gu, Cheng-Wei (1, 2); Chen, Fang-Min (1, 2); Li, Xiang (1, 2); Zhang, Cheng-Jin (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:Li, Xiang(lixiang@mail.usts.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:227-231
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effect of phosphate concentration on nitrification was studied by using a stabilization nitrosation system, which was started up in a continuous flow reactor by inoculating sludge from a municipal wastewater treatment plant. The results showed that the nitrification system was started successfully after operating for 14 days. The conversion rate of ammonia nitrogen reached 92.2%, the nitrite accumulation rate was 73.66%, and the nitrite generation rate was 14.42 g&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>. There was no effect of phosphate concentration on the nitrosation system between 10 and 30 mg&bull;L<sup>-1</sup>; and the conversion rate of ammonia nitrogen was decreased with the continuous increase in phosphate concentration. When the concentration of phosphate was 80 mg&bull;L<sup>-1</sup>, with an ammonia conversion rate 13.6%, accumulation rate of nitrite of 18.19%, and nitrite generation rate of 0.54 g&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>, the reaction was severely inhibited. After reducing the influent phosphate concentration to 0, with the ammonia nitrogen conversion rate at more than 80%, nitrite accumulation rate improved to 86.96%, and the nitrite generation rate being 15.63 g&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>, the system recovered after operating for 14 days.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Nitrification
Controlled terms:Ammonia - Enzyme inhibition - Nitration - Nitrogen - Phosphates - Recovery - Wastewater treatment
Uncontrolled terms:Accumulation rates - Ammonia conversion - Continuous flow reactors - Continuous flows - Municipal wastewater treatment plants - Nitrite accumulation - Nitrosation - Phosphate concentration
Classification code:452.4  Industrial Wastes Treatment and Disposal - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 3.84e-02yr, Mass_Density 8.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.36e+01%, Percentage 1.82e+01%, Percentage 7.37e+01%, Percentage 8.00e+01%, Percentage 8.70e+01%, Percentage 9.22e+01%
DOI:10.13227/j.hjkx.201705194

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 86>

Accession number:20183705802962
Title:Removal and Influence of Ciprofloxacin in a Membrane Bioreactor
Title of translation:&#29615;&#19993;&#27801;&#26143;&#23545;&#33180;&#29983;&#29289;&#21453;&#24212;&#22120;&#36816;&#34892;&#25928;&#33021;&#30340;&#24433;&#21709;&#21450;&#20854;&#21435;&#38500;&#29305;&#24615;
Authors:Dai, Qi (1, 2); Liu, Rui (2); Shu, Xiao-Ming (2); Zhang, Yong-Ming (1); Chen, L&uuml;-Jun (2, 3) 
Author affiliation:(1) College of Life and Environment Science, Shanghai Normal University, Shanghai; 200234, China; (2) Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Ecological Environment, Yangtze Delta Region Institute of Tsinghua University, Jiaxing; 314006, China; (3) School of Environment, Tsinghua University, Beijing; 100084, China 
Corresponding author:Liu, Rui(liuruitsinghuazj@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:212-218
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A membrane bioreactor (MBR) was used to treat ciprofloxacin (CIP)-contaminated artificial wastewater. The pollutant removal performance and the microbial community structure of the MBR were studied at three different CIP dosages (0 mg&bull;L<sup>-1</sup>, 5 mg&bull;L<sup>-1</sup>, and 10 mg&bull;L<sup>-1</sup>). The results showed that the sludge concentration in the reactor decreased and then levelled off as the dosage of CIP was increased from 0 mg&bull;L<sup>-1</sup> to 5 mg&bull;L<sup>-1</sup> and further to 10 mg&bull;L<sup>-1</sup>. The mean removal of TOC and COD decreased from 98. 40% and 97.80% to 84.20% and 94.10%, respectively, indicating that the CIP negatively influenced the organic removal but the effect was minor. In contrast, the ammonium removal was greatly influenced by the dosage of CIP. When the CIP dosage increased from 0 mg&bull;L<sup>-1</sup> to 5 mg&bull;L<sup>-1</sup> and further to 10 mg&bull;L<sup>-1</sup>, the ammonium removal efficiency decreased from 96.91% to 84.14% and then to 77.80%, and the activity of Nitrosomonas, Alcaligenes, Nitrospira, and Nitrobacter were greatly inhibited. The CIP removal initially increased and then decreased. The mass balance revealed that the removal of CIP in the MBR was principally attributed to biodegradation and sludge adsorption, which accounted for 30.13% and 0.25%, respectively, at a CIP dosage of 5 mg&bull;L<sup>-1</sup> and 7.55% and 1.81% at a CIP dosage of 10 mg&bull;L<sup>-1</sup>.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Bioreactors
Controlled terms:Antibiotics - Biodegradation - Microorganisms - Wastewater treatment
Uncontrolled terms:Ammonium nitrogen - Ciprofloxacin - Mass balance - Membrane bio reactor (MBR) - Nitrifying microorganism community
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461  Bioengineering and Biology
Numerical data indexing:Mass_Density 0.00e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 0.00e+00kg/m3 to 5.00e-03kg/m3, Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.81e+00%, Percentage 2.50e-01%, Percentage 3.01e+01%, Percentage 4.00e+01%, Percentage 7.55e+00%, Percentage 7.78e+01%, Percentage 9.41e+01%, Percentage 9.69e+01% to 8.41e+01%, Percentage 9.78e+01% to 8.42e+01%
DOI:10.13227/j.hjkx.201704059

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 87>

Accession number:20183705802880
Title:Influence of Air Pollution Control (APC) Systems and Furnace Type on the Characteristics of APC Residues from Municipal Solid Waste Incinerators
Title of translation:&#28895;&#27668;&#20928;&#21270;&#24037;&#33402;&#21644;&#28954;&#28903;&#28809;&#31867;&#22411;&#23545;&#29983;&#27963;&#22403;&#22334;&#28954;&#28903;&#39134;&#28784;&#24615;&#36136;&#30340;&#24433;&#21709;
Authors:Zhang, Hua (1); Yu, Si-Yuan (1); Shao, Li-Ming (1, 2); He, Pin-Jing (1, 2) 
Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (2) Centre for the Technology Research and Training on Household Waste in Small Towns &amp; Rural Area, Ministry of Housing and Urban-Rural Development, Shanghai; 200092, China 
Corresponding author:He, Pin-Jing(solidwaste@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:467-476
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The characteristics of air pollution control (APC) residues are influenced by the furnace type, APC system, and waste composition. In this study, the characteristics of APC residues from nine municipal solid waste incineration plants (the compositions of incinerated solid waste are similar) with different furnace types and APC systems were compared. APC residues contain a great amount of Ca and Cl, and the contents of Al, Si, and Fe in the APC residues from fluidized bed incinerators are higher. The mineral compositions of APC residues are not influenced by the flue gas treatment process, but their contents vary. The contents of Cd, Pb, and Zn in the APC residues from fluidized bed incinerators are lower, while those of Cr, Ba, Cu, and Ni are greatly influenced by the APC systems, with the "grate+dry scrubber" APC residues having the lowest values. The differences in the heavy metal contents in the APC residues from two incinerators before and after the upgrading of the APC systems are not significant. The leaching toxicity of Pb in the APC residues from grate incinerators is higher than that from fluidized bed incinerators, while some elements with low contents in fluidized bed APC residues can be leached more in acetic acid buffer solution. The acid neutralization capacity of the APC residues is related to Ca content. The leaching concentrations of most heavy metals are significantly increased under strong acidity (Cd, Ni, and Zn: leachate pH&lt;8; Pb, Cu, and Cr: leachate pH&lt;4). The maximum leaching concentrations of As, Ba, Cu, Ni, and Pb in the APC residues from grate incinerators are mainly controlled by their total content. The leaching concentrations of As, Ba, Cu, Ni, and Pb in the APC residues from fluidized bed incinerators are lower than those from grate incinerators with similar metal contents, which may be due to their different chemical speciation influenced by furnace types and the complexation with Al and Fe compounds.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Municipal solid waste
Controlled terms:Air cleaners - Air pollution - Air pollution control - Aluminum compounds - Calcium - Chemical speciation - Flue gases - Fluidized beds - Furnaces - Heavy metals  - Iron compounds - Leaching - Toxicity - Waste incineration
Uncontrolled terms:Acid-neutralization capacity - Air pollution control (APC) residue - Air pollution control residues - Flue gas cleaning - Fluidized bed incinerator - Leaching concentrations - Leaching toxicity - Municipal solid waste incinerator
Classification code:451  Air Pollution - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 452.4  Industrial Wastes Treatment and Disposal - 461.7  Health Care - 531  Metallurgy and Metallography - 549.2  Alkaline Earth Metals - 802.2  Chemical Reactions - 802.3  Chemical Operations
DOI:10.13227/j.hjkx.201705241

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 88>

Accession number:20183705802980
Title:Effects of Straw and Biochar Return in Soil on Soil Aggregate and Carbon Sequestration
Title of translation:&#31224;&#31174;&#19982;&#29983;&#29289;&#28845;&#36824;&#30000;&#23545;&#22303;&#22756;&#22242;&#32858;&#20307;&#21450;&#22266;&#30899;&#29305;&#24449;&#30340;&#24433;&#21709;
Authors:Xu, Guo-Xin (1); Wang, Zi-Fang (1); Gao, Ming (1); Tian, Dong (1); Huang, Rong (1); Liu, Jiang (1); Li, Jia-Cheng (1) 
Author affiliation:(1) College of Resource and Environment, Southwest University, Chongqing; 400715, China 
Corresponding author:Wang, Zi-Fang(zifangw@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:355-362
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The aim of this work is to understand the effects of straw and biochar return in soil on the content, distribution, stability, and relative contribution rate of organic carbon for soil aggregates, which could be used to better understanding the stability of the soil carbon pool and the protection mechanisms under straw and biochar return. In this study, a field experiment was conducted to study the effects of straw and biochar return on soil aggregates and carbon sequestration characteristics in a rape-maize rotation planting system. Five treatments, including a control (no organic material added, CK), straw (CS), straw and microorganism (CSD), Biochar (BC), half straw and half biochar (CSBC), were used. The results indicated that &#9312; Straw and biochar could improve the content of soil organic carbon, and the BC and CSBC treatments increased it by 16.88-17.37 g&bull;kg<sup>-1</sup>, values higher than those with the CS and CSD treatments (13.76-14.68 g&bull;kg<sup>-1</sup>); &#9313; Compared with the CK treatment, CS and CSD treatments could increase the stability of the aggregates through significantly increasing the content of macro-aggregate by 94.00%-117.78% and significantly increasing the mean weight diameter (MWD), geometric mean diameter (GMD), and R<inf>0.25</inf> of water stable aggregates, but reducing the D value (P&lt;0.05); and &#9314; With the increase in aggregate particle size, the content of organic carbon in the aggregates decreased first and then increased. The contribution rate of soil organic carbon in silt and clay was the highest (29.61%-42.18%), and the contribution rate of organic carbon in the macro-aggregate was the lowest (9.19%-17.81%). In addition to the CSD treatment, the CS, BC, and CSBC treatments reduced the contribution of larger aggregates (2-0.25 mm) and micro-aggregates (0.25-0.053 mm). In general, the benefit of straw return was better than that of biochar in promoting soil aggregation. However, the application of biochar was better than straw in improving the aggregates organic carbon content. The newly generated carbon from straw degradation was mainly distributed in large aggregates. Straw with microorganisms could promote the combination of carbon by different components in the larger aggregates. The carbon from biochar and straw with biochar treatments were mainly concentrated in micro-aggregates.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Organic carbon
Controlled terms:Aggregates - Forestry - Microorganisms - Particle size - Soils - Straw
Uncontrolled terms:Bio chars - Carbon sequestration - Contribution rate - Geometric mean diameters - Organic carbon contents - Protection mechanisms - Soil aggregate - Water stable aggregates
Classification code:406  Highway Engineering - 461.9  Biology - 483.1  Soils and Soil Mechanics - 804.1  Organic Compounds - 821.5  Agricultural Wastes
Numerical data indexing:Percentage 2.96e+01% to 4.22e+01%, Percentage 9.19e+00% to 1.78e+01%, Percentage 9.40e+01% to 1.18e+02%, Size 2.00e-03m to 2.50e-04m, Size 2.50e-04m to 5.30e-05m
DOI:10.13227/j.hjkx.201705217

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 89>

Accession number:20183705802946
Title:Estimation of and Control Strategies for Pollution Loads from Non-point Sources in the Chenghai Watershed
Title of translation:&#31243;&#28023;&#27969;&#22495;&#38750;&#28857;&#28304;&#27745;&#26579;&#36127;&#33655;&#20272;&#31639;&#21450;&#20854;&#25511;&#21046;&#23545;&#31574;
Authors:Chen, Xue-Kai (1, 3); Liu, Xiao-Bo (1, 3); Peng, Wen-Qi (1, 3); Dong, Fei (1, 3); Huang, Zhi-Hua (1, 3); Feng, Shun-Xin (1, 3); Wang, Ruo-Nan (1, 2, 3) 
Author affiliation:(1) Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing; 100038, China; (2) College of Hydrology and Water Resources, Hohai University, Nanjing; 210098, China; (3) State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing; 100038, China 
Corresponding author:Liu, Xiao-Bo(xbliu@iwhr.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:77-88
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The calculation of non-point source (NPS) pollutant loads of nitrogen and phosphorus is the key step in preparing a pollution control plan. This study modified the export coefficient model by taking into account the precipitation, slope, distance between pollution sources and water bodies, and other relevant factors. The NPS pollution load assessment method established in this study can be applied to data-scarce basins and is suitable for plateau lake regions affected by terrain and precipitation. In this study, Chenghai Lake, which belongs to one of the nine major plateau lakes in Yunnan Province, is selected for the case study. This study first verifies the rationality of the improved export coefficient model based on actual observed values, and then utilizes the improved export coefficient model to assess the loads of dissolved nitrogen (DN) and dissolved phosphorus (DP) pollution. As indicated by the results, in 2014, the loads of DN and DP into Chenghai Lake are 158.48 t&bull;a<sup>-1</sup> and 24.70 t&bull;a<sup>-1</sup>, respectively. The maximum contributions of DN and DP pollution load into Chenghai Lake are from agricultural cultivated land are 46.19% and 48.16%, respectively, in terms of land use. The results present a relatively consistent spatial distribution of DN and DP that indicates that the south bank is a key area for governance. Livestock and rural living are the main pollution sources influencing the load of DN and DP into Chenghai Lake and should be prioritized for control. If the pollution from rural living, livestock, fertilizer loss, and land use can be effectively controlled, the load of DN and DP into Chenghai Lake will be decreased by a maximum of 38.47% and 40.76%, respectively. The results of this study suggest that the improved export coefficient model can be applied for study of the NPS pollution assessment of plateau lake regions and can provide a theoretical basis for the NPS pollution control of the Chenghai Lake basin.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:39
Main heading:Pollution control
Controlled terms:Agriculture - Lakes - Land use - Nitrogen - Phosphorus - Rural areas - Water pollution - Watersheds
Uncontrolled terms:Control strategies - Dissolved nitrogen - Dissolved phosphorus - Export coefficient models - Nitrogen and phosphorus - Non-point source - Nonpoint sources - Pollution sources
Classification code:403  Urban and Regional Planning and Development - 444.1  Surface Water - 453  Water Pollution - 804  Chemical Products Generally - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 3.85e+01%, Percentage 4.08e+01%, Percentage 4.62e+01%, Percentage 4.82e+01%
DOI:10.13227/j.hjkx.201705061

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 90>

Accession number:20183705802979
Title:Effect of Biochar on Ammonia Volatilization from Soils of Different Surface Conditions
Title of translation:&#19981;&#21516;&#22320;&#34920;&#26465;&#20214;&#19979;&#29983;&#29289;&#28845;&#23545;&#22303;&#22756;&#27688;&#25381;&#21457;&#30340;&#24433;&#21709;
Authors:Zou, Juan (1); Hu, Xue-Yu (1); Zhang, Yang-Yang (1); Chen, Yao-Jun (1); Wang, Xiang-Qian (1); Liu, Yang (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:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:348-354
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to explore the effect of biochar on the volatilization of ammonia in different surface soils, through the field test method, the responsiveness changes of ammonia volatilization, ammonium nitrogen, and urease were studied under the influence of biochar and crop cultivation. The study set six treatments: CK+, BC0.5+, and BC4.5+(the biochar applied at 0, 0.5, 4.5 kg&bull;(m<sup>2</sup>&bull;a)<sup>-1</sup>, respectively, under the condition of crop cultivation), and CK-, BC0.5-, and BC4.5-(the biochar applied at 0, 0.5, 4.5 kg&bull;(m<sup>2</sup>&bull;a)<sup>-1</sup>, respectively, under the condition of bare land). The results showed that under the condition of crop cultivation, the ammonia volatilization of the BC4. 5+and BC0.5+treatments increased in 4 days, then significantly decreased by 9.95%-61.80% and 7.97%-50.52% (P&lt;0.05), respectively, with respect to CK+. However, compared with CK-, the ammonia volatilization of the BC4.5-and BC0.5-treatments increased by 40.02%-93.15% and 28.09%-57.45% (P&lt;0.05), respectively. For the same amount of biochar application, the ammonia volatilization of the crop-planting soil was significantly lower than that of the bare land, and BC4. 5+and BC0.5+declined by 27.10%-92.10% and 13.17%-83.45%(P&lt;0.05), respectively, compared with the BC4.5-and BC0.5-, and there was no significant difference between CK+ and CK-. The above results indicated that biochar-mediated soil ammonia volatilization was inhibited by the surface cover. Moreover, with respect to CK+, the maximum increase rates of the contents of ammonium nitrogen and urease in the BC4.5+and BC0.5+ treatments were orderly at 69.25% and 72.73% and 93.61% and 90.56% (P&lt;0.05), but the soil ammonia volatilization decreased in the same period. The biggest decline of the soil NH<inf>4</inf><sup>+</sup>-N and urease content of BC4.5-and BC0.5-were 63.78% and 95.70% and 78.38% and 92.64% (P&lt;0.05), respectively. Simultaneously, the soil ammonia volatilization rose in the bare land compared with CK-. Therefore, the soil ammonia volatilization was inversely related to soil NH<inf>4</inf><sup>+</sup>-N and urease under the influence of biochar, and the effect of crop planting was more profound.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Ammonia
Controlled terms:Crops - Nitrogen - Soils - Testing
Uncontrolled terms:Ammonia volatilization - Ammonium nitrogen - Bare lands - Bio chars - Land cover
Classification code:483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 821.4  Agricultural Products
Numerical data indexing:Age 1.10e-02yr, Percentage 2.71e+01% to 9.21e+01%, Percentage 4.00e+01% to 9.32e+01%, Percentage 6.38e+01%, Percentage 6.92e+01%, Percentage 7.27e+01%, Percentage 7.84e+01%, Percentage 9.36e+01%, Percentage 9.57e+01%, Percentage 9.95e+00% to 6.18e+01%
DOI:10.13227/j.hjkx.201706171

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 91>

Accession number:20183705802940
Title:Seasonal Characteristics and Ecological Risk Assessment of Heavy Metals in PM<inf>10</inf> Around Electroplating Plants
Title of translation:&#30005;&#38208;&#21378;&#21608;&#36793;&#22823;&#27668; PM<inf>10</inf>&#20013;&#37325;&#37329;&#23646;&#23395;&#33410;&#24615;&#20998;&#24067;&#29305;&#24449;&#21450;&#29983;&#24577;&#39118;&#38505;&#35780;&#20215;
Authors:Zhao, Zhen-Li (1); Zhao, Wei-Tuo (2); Huang, Ting (1); Cheng, Sheng-Gao (1); Yu, Cong-Cong (1); Yin, Yi-Meng (1) 
Author affiliation:(1) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) The Center of Environmental Engineering and Assessment, No. 203 Research Institute of Nuclear Industry, Xianyang; 712000, China 
Corresponding author:Zhao, Wei-Tuo(weituo2006@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:18-26
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:PM<inf>10</inf> samples were collected from 45 sites around the electroplating factories in five towns in Dongguan at different times during all four seasons in 2015. The contents of 12 heavy metals (HMs) from the PM<inf>10</inf> samples were analyzed by ICP-MS. The seasonal and spatial distribution characteristics and the ecological risk were analyzed to provide a scientific foundation for the relevant department to make decisions regarding the environmental hazard, risk assessment and, pollution control. The results showed that PM<inf>10</inf> concentrations in the towns were lower than national standard level-&#8545;, and the air pollution was heavier in winter than summer. The HM concentrations were higher in autumn and winter, and As, Cd, and Cr concentrations were higher than national standard (GB3095-2012). The concentrations of HMs in Humen, Shatian, and Dalingshan were much higher. The results for the enrichment factor and the geoaccumulation index indicated that Cd, Sb, Hg, and Co were in the extreme degree of pollution category, Pb and Zn were in the slight to extreme degree of pollution category, and Ni, Cr, Mn, and V were described as uncontaminated. The average potential ecological risk assessment (RI) of the HMs from the PM<inf>10</inf> samples was more than 600, which suggested an extremely serious ecological risk in the study area.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Risk assessment
Controlled terms:Electroplating - Heavy metals - Pollution control
Uncontrolled terms:Ecological risk assessment - Enrichment factors - Geo-accumulation index - PM10 - Potential ecological risk - Scientific foundations - Seasonal and spatial distributions - Seasonal characteristics
Classification code:531  Metallurgy and Metallography - 539.3.1  Electroplating - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201705025

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 92>

Accession number:20183705802966
Title:Effect of Volume Loading Rate (VLR) on Denitrifying Phosphorus Removal by the ABR-MBR Process
Title of translation:&#23481;&#31215;&#36127;&#33655;&#23545;ABR-MBR&#24037;&#33402;&#21453;&#30813;&#21270;&#38500;&#30967;&#24615;&#33021;&#30340;&#24433;&#21709;
Authors:L&uuml;, Liang (1, 2); You, Wen (1, 2); Wei, Jia-Min (1, 2); Wu, Peng (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:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:239-246
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effect of volume loading rate (VLR) on denitrifying phosphorus removal was investigated in a continuous-flow ABR-MBR combined process treating domestic wastewater to arrive at optimum process parameters. In the experiment, the VLR of the ABR was set at 0.76, 1.01, 1.51, and 2.27 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>. The removal of carbon, nitrogen, and phosphorus in the system and the effect of the VLR in the MBR on nitrification performance were observed for each VLR of the ABR. The results showed that under the condition when the VLR of the ABR was 1.51 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>, the amount of COD removal in the A2 chamber was the largest, and shortcut nitrification was achieved in the MBR when the VLR of the MBR was 1.51 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>. Meanwhile, the removal efficiency of NH<inf>4</inf><sup>+</sup>-N and TN reached more than 90% and 72%, respectively, the anaerobic P-release and anoxic P-uptake were 7.41 mg&bull;L<sup>-1</sup>and 15.42 mg&bull;L<sup>-1</sup>, respectively, and the concentration of PO<inf>4</inf><sup>3-</sup>-P in effluent was lower than 0.5 mg&bull;L<sup>-1</sup>, which indicated that the shortcut nitrification was more conducive to strengthening the performance of denitrifying phosphorus removal in the ABR-MBR system.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:22
Main heading:Loading
Controlled terms:Denitrification - Effluents - Nitrification - Nitrogen removal - Phosphorus - Wastewater treatment
Uncontrolled terms:Anaerobic P-release - Denitrifying phosphorus removal - Domestic wastewater - Nitrification performance - Process parameters - Removal efficiencies - Shortcut nitrification - Volume loadings
Classification code:452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 691.2  Materials Handling Methods - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 1.54e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 7.20e+01%, Percentage 9.00e+01%
DOI:10.13227/j.hjkx.201707072

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 93>

Accession number:20183705802987
Title:Distribution Characteristics of Mercury in Reed Leaves from the Jiapigou Gold Mine in the Songhua River Upstream
Title of translation:&#26494;&#33457;&#27743;&#19978;&#28216;&#22841;&#30382;&#27807;&#37329;&#30719;&#24320;&#37319;&#21306;&#33446;&#33479;&#21494;&#29255;&#27742;&#20998;&#24067;&#29305;&#24449;
Authors:Zhang, Man-Yin (1, 2, 4); Li, Meng-Jie (1, 2, 4); Cui, Li-Juan (1, 2, 3); Wang, He-Nian (1, 2, 4); Guo, Zi-Liang (1, 2, 4); Xu, Wei-Gang (1, 2, 4); Wei, Yuan-Yun (1, 2, 4); Yang, Si (1, 2, 4); Xiao, Hong-Ye (1, 2, 4) 
Author affiliation:(1) Institute of Wetland Research, Chinese Academy of Froestry, Beijing; 100091, China; (2) Beijing Key Laboratory of Wetland Services and Restoration, Beijing; 100091, China; (3) Hanshiqiao National Wetland Ecosystem Research Station, Beijing; 101399, China; (4) Heibei Hengshuihu National Wetland Ecosystem Research Station, Hengshui; 053000, China 
Corresponding author:Cui, Li-Juan(lkyclj@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:415-421
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:At the Jiapigou gold mine of the Songhua River upstream, reed leaves (Phragmites australis), soil, and water samples were collected from June (summer) and September (autumn) 2016 for the determination of mercury. Moreover, the mercury concentrations in the air were determined synchronously. Furthermore, the level of mercury pollution in the reed leaves was determined by a single factor pollution index method, and the relationships among mercury concentrations in the reed leaves and environmental factors were analyzed to research the distribution characteristics, influencing factors, and correlations around the gold mining area. The results show that, in terms of spatial distribution, the mercury concentrations in reed leaves, soil, and water gradually decay with the distance from the gold mining area, and the spatial distribution of the mercury concentrations in the air was not obvious. Regarding a temporal distribution, the mercury concentrations in the reed leaves in summer were lower than those in autumn in the heavy pollution areas, while the distribution in the light pollution areas was the opposite, as the mercury concentrations of air and soil in summer were higher than those in autumn. The influence of environmental factors on the mercury concentrations in the reed leaves was soil&gt;air&gt;water. In addition, after stopping gold mining and processing using mercury, the mercury source in the area was the soil.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:River pollution
Controlled terms:Economic geology - Gold mines - Rivers - Soil pollution - Soils - Spatial distribution
Uncontrolled terms:Characteristics - Environmental factors - Mercury pollution - Reed leaves - Songhua River
Classification code:453  Water Pollution - 481.1  Geology - 483.1  Soils and Soil Mechanics - 504.3  Heavy Metal Mines - 921  Mathematics
DOI:10.13227/j.hjkx.201706252

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 94>

Accession number:20183705802943
Title:Air Quality Subarea Management: A Case Study of Guangdong Province
Title of translation:&#22823;&#27668;&#29615;&#22659;&#20998;&#21306;&#31649;&#29702;: &#20197;&#24191;&#19996;&#30465;&#20026;&#20363;
Authors:Yang, Liu-Lin (1, 2); Li, Min-Hui (1, 2); Liao, Cheng-Hao (1, 2); Zeng, Wu-Tao (1, 2); Zhang, Hui (1, 2); Zhang, Yong-Bo (1, 2) 
Author affiliation:(1) Guangdong Provincial Academy of Environmental Science, Guangzhou; 510045, China; (2) Guangdong Provincial Environmental Protection Key Laboratory of Atmospheric Environment Management and Policy Simulation, Guangzhou; 510045, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:49-56
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To meet the requirements of regional air quality management (AQM), the Air Quality Subarea Management (AQSM) system was proposed. A case study was conducted for Guangdong Province. By using the method of air quality numerical simulation and satellite remote sensing inversion analysis, the key factors were selected from the meteorological simulation field, the pollutant concentration simulation field, and the satellite image interpretation to form the index system for AQSM. On this basis, a hierarchical cluster analysis method was used to divide Guangdong Province into three types of AQSM: Strict Control Subarea, Continuous Improvement Subarea, and Coordinated Development Subarea. It was shown that the Strict Control Subarea, Continuous Improvement Subarea, and Coordinated Development Subarea in Guangdong Province covered 16.3%, 28.0%, and 55.7%, respectively. The Strict Control Subarea in the Pearl River Delta, Eastern Guangdong, Western Guangdong, and Northern Guangdong accounted for 27.9%, 19.3%, 4.4%, and 12.5%, respectively, and the subarea should implement the most stringent AQM policies to promote air quality improvement. The Continuous Improvement Subarea in the Pearl River Delta, Eastern Guangdong, Western Guangdong, and Northern Guangdong accounted for 34.4%, 15.8%, 7.8%, and 34.5%, respectively, and the subarea should implement relatively strict AQM policies to ensure sustained and stable standards. The Coordinated Development Subarea in the Pearl River Delta, Eastern Guangdong, Western Guangdong, and Northern Guangdong accounted for 37.7%, 64.9%, 87.8%, and 53.0%, respectively, and the subarea could implement more liberal AQM policies to ensure relatively good air quality. In general, the strict AQM policies in Guangdong Province should be mainly concentrated in the Pearl River Delta region, followed by Northern Guangdong, Eastern Guangdong, and Western Guangdong in order.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Quality control
Controlled terms:Air quality - Cluster analysis - Gems - Hierarchical systems - Numerical methods - Quality management - Remote sensing - Rivers - Satellites
Uncontrolled terms:Air quality simulation - Atmospheric environment - Guangdong Province - Hierarchical cluster analysis - Satellite remote sensing
Classification code:451.2  Air Pollution Control - 482.2.1  Gems - 655.2  Satellites - 723  Computer Software, Data Handling and Applications - 912.2  Management - 913.3  Quality Assurance and Control - 921.6  Numerical Methods - 961  Systems Science
Numerical data indexing:Percentage 1.25e+01%, Percentage 1.58e+01%, Percentage 1.63e+01%, Percentage 1.93e+01%, Percentage 2.79e+01%, Percentage 2.80e+01%, Percentage 3.44e+01%, Percentage 3.45e+01%, Percentage 3.77e+01%, Percentage 4.40e+00%, Percentage 5.30e+01%, Percentage 5.57e+01%, Percentage 6.49e+01%, Percentage 7.80e+00%, Percentage 8.78e+01%
DOI:10.13227/j.hjkx.201706055

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 95>

Accession number:20183705802972
Title:Enhancement of Anaerobic Methane Production by Removal of Organic-bonding Metals from Sewage Sludge
Title of translation:&#21435;&#38500;&#22478;&#24066;&#29983;&#27963;&#27745;&#27877;&#20013;&#26377;&#26426;&#32476;&#21512;&#24577;&#37329;&#23646;&#24378;&#21270;&#20854;&#21388;&#27687;&#29983;&#29289;&#21046;&#27668;
Authors:Lu, Yi-Qing (1); Xu, Ying (1); Dong, Bin (1); Dai, Xiao-Hu (1) 
Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China 
Corresponding author:Dong, Bin(tj_dongbin@vip.163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:284-291
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To improve anaerobic digestion biogas yield, the removal of organic-bonding metals by EDTA pretreatment was investigated to strengthen the anaerobic biogas effect. The results showed that after EDTA pretreatment (experimental group), the organic-bonding metals were reduced from (5.09&plusmn;0.57)% to (1.37&plusmn;0.20)% (calculated with TS) and dissolved organic matter increased significantly (SCOD improved 627%), suggesting that this method could remove a large amount of organic-bonding metals and enhance the dissolution of organic sludge. According to the results for the apparent activation energy (AAE) of sludge organic matter dissolution, the AAE of the experiment group was 36% lower than the control group, showing that pretreatment could effectively reduce the reaction energy barrier for organic matter dissolution. In a test of anaerobic acid production lasting 16 days, the VFAs of the experiment group were higher than the control group, with the largest upgrade of 42%. In the anaerobic methane production test (BMP) that lasted for 22 days, compared with control group, the accumulated biogas production of the experiment group increased by 48%. Through further research on the dynamics of methane production, the rate-limiting step in the experiment group was methanogenesis, while that of the control group was hydrolysis, indicating that removal of organic-bonding metals by EDTA pretreatment could effectively accelerate the hydrolysis rate.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Anaerobic digestion
Controlled terms:Activation energy - Biogas - Biogeochemistry - Biological materials - Dissolution - Hydrolysis - Metals - Methane - Sewage sludge - Sludge digestion  - Volatile fatty acids
Uncontrolled terms:Anaerobic methane - Apparent activation energy - Bonding metals - Dissolved organic matters - Experimental groups - Methane production - Rate-limiting steps - Reaction energy barriers
Classification code:452.2  Sewage Treatment - 461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 522  Gas Fuels - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Age 4.38e-02yr, Age 6.03e-02yr, Percentage 3.60e+01%, Percentage 4.20e+01%, Percentage 4.80e+01%, Percentage 6.27e+02%
DOI:10.13227/j.hjkx.201706067

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 96>

Accession number:20183705802956
Title:Evaluation of Performance of an Aminated Rosin-based Resin for Adsorption of Norfloxacin from Aqueous Solutions
Title of translation:&#27688;&#21270;&#26494;&#39321;&#22522;&#20132;&#32852;&#32858;&#21512;&#26641;&#33026;&#23545;&#27700;&#20013;&#35834;&#27679;&#27801;&#26143;&#30340;&#21560;&#38468;&#24615;&#33021;
Authors:Ma, Ya-Hong (1); Huang, Wan-Ting (1); Diao, Kai-Sheng (1); Li, Peng-Fei (1); Tan, Xue-Cai (1); Dong, Hui-Yu (2); Qin, Fang-Kua (1); Lei, Fu-Hou (1); Liu, Shao-Gang (1, 2) 
Author affiliation:(1) Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Key Laboratory of Guangxi Colleges and Universities for Food and Pharmaceutical Analytical Chemistry, School of Chemistry and Chemical Engineering, Nanning; 530008, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China 
Corresponding author:Lei, Fu-Hou(leifuhou@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:161-169
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:An aminated rosin-based resin (ARBR) was synthesized as a novel environmentally-friendly adsorbent for removal of Norfloxacin (NOR) from aqueous solutions. Its features were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and surface area measurements (BET). The effects of resin dosage, pH, and ionic strength on the ARBR adsorption properties of NOR were investigated by batch experiments. Results showed that the NOR adsorption amounts increased with pH in the range from 2.0 to 6.0, but decreased at higher pH (8-10). The adsorption process of NOR followed a pseudo-second rate model and could be fitted to the Langmuir isotherm, with calculated maximum monolayer adsorption capacity of 30.29 mg&bull;g<sup>-1</sup> at pH 6.0 and 20&#8451;. Thermodynamic calculations showed that the adsorption of NOR was a spontaneous and endothermic process and could be attributed to a combination of electrostatic interactions and hydrogen bonding. Furthermore, the adsorbed NOR on ARBR could be efficiently desorbed by 0.1 mol&bull;L<sup>-1</sup> HCl to regenerate the resin. After five adsorption-desorption recycles, ARBR had a stable adsorption performance and could be recycled. The adsorption performance is better than that of various commercial resins, and these research results contribute to the development of applications of rosin derivatives and their utilization in the environmental control of micro pollutants.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Adsorption
Controlled terms:Chlorine compounds - Desorption - Environmental management - Fourier transform infrared spectroscopy - Hydrogen bonds - Ionic strength - Isotherms - Resins - Scanning electron microscopy - Solutions  - Thermodynamics
Uncontrolled terms:Adsorption desorption - Adsorption performance - Adsorption properties - Environmental control - Interaction mechanisms - Norfloxacin - Surface area measurement - Thermodynamic calculations
Classification code:454.1  Environmental Engineering, General - 641.1  Thermodynamics - 801  Chemistry - 801.4  Physical Chemistry - 802.3  Chemical Operations - 815.1.1  Organic Polymers
Numerical data indexing:Molar_Concentration 1.00e+02mol/m3 to 2.20e-02mol/m3
DOI:10.13227/j.hjkx.201701058

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 97>

Accession number:20183705802975
Title:Effects of Three Soil Amendments on Greenhouse Gas Emissions From Corn Fields in the Hetao Irrigation District
Title of translation:3&#31181;&#22303;&#22756;&#25913;&#33391;&#21058;&#23545;&#27827;&#22871;&#28748;&#21306;&#29577;&#31859;&#30000;&#28201;&#23460;&#27668;&#20307;&#25490;&#25918;&#30340;&#24433;&#21709;
Authors:Wu, Yan (1, 4); Hong, Mei (1, 4); Lin, Li-Long (2); Liu, Mei (3); Liu, Yu-Jie (3) 
Author affiliation:(1) College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot; 010010, China; (2) Soil and Fertilizer Station in Inner Mongolia, Hohhot; 010011, China; (3) Hangjinhouqi Agricultural Extension Center, Bayinnaoer; 015000, China; (4) Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resources, Hohhot; 010010, China 
Corresponding author:Hong, Mei(nmhm1970@sina.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:310-320
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the effects of soil amendments on greenhouse gas emissions, five different fertilization treatments (no fertilization, conventional fertilization, conventional fertilization+bentonite, conventional fertilization+biochar, and conventional fertilization+potassium polyacrylate, labeled as NF, CK, B, C, and PAM) were applied on corn fields in the Hetao irrigation district during the maize growing seasons of 2015 and 2016, and the samples were analyzed by static chamber-gas chromatography. The results showed that N<inf>2</inf>O had a bimodal emission pattern in the Hetao Irrigation Area, and the N<inf>2</inf>O emission peak appeared five to seven days after topdressing and irrigating (d. p. ti). The CH<inf>4</inf> emission had no apparent pattern. While the CH<inf>4</inf> emission peak appeared with a few treatments after 6 d. p. ti, the rest of the period indicated the CH<inf>4</inf> absorption in the soil. CO<inf>2</inf> had a unimodal emission pattern, and the CO<inf>2</inf> emission peak appeared during the jointing stage of maize growth. In addition, the correlation analysis indicated that an increase in soil temperature could significantly increase the N<inf>2</inf>O and CO<inf>2</inf> emission rates. Moreover, compared with the CK treatment, the B and PAM treatments could significantly decrease the cumulative emission of N<inf>2</inf>O (P&lt;0. 05), with a decline of 38.59% and 45.35%, respectively. The B and C treatments could significantly enhance the soil uptake of CH<inf>4</inf> (P&lt;0.05), and the cumulative absorption of CH<inf>4</inf>increased 144.44% and 172.22%, respectively. The B and C treatment results were significantly different from the CK treatment based on the cumulative emission of CO<inf>2</inf> (P&lt;0.05), with a decrease of 25.40% and 22.21%, respectively. In general, compared with the CK treatment, the comprehensive warming potential of the B, C, and PAM treatments declined by 27.77%, 19.61%, and 12.16%, respectively. The greenhouse gas emission intensity of the B, C, and PAM treatments decreased by 35.20%, 26.65%, and 13.36%, respectively. The maize yield with the B and C treatments was significantly increased by 11.33% and 9.59%, respectively; and the economic budget of net ecosystem was increased by 16.15% and 12.65%, respectively (P&lt;0.05). In summary, adding extra bentonite and biocarbon to the conventional fertilization was an effective agricultural measure for improving crop yield and reducing the global warming potential for the corn planting system in the Hetao irrigation area.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:Gas emissions
Controlled terms:Bentonite - Budget control - Carbon dioxide - Gas chromatography - Global warming - Greenhouse gases - Irrigation
Uncontrolled terms:Biocarbon - Correlation analysis - Cumulative emissions - Global warming potential - Hetao irrigation districts - HetaoIrrigation Area - Maize growing season - Warming potential
Classification code:443.1  Atmospheric Properties - 451.1  Air Pollution Sources - 482.2  Minerals - 802.3  Chemical Operations - 804.2  Inorganic Compounds - 821.3  Agricultural Methods
Numerical data indexing:Percentage 1.13e+01%, Percentage 1.22e+01%, Percentage 1.27e+01%, Percentage 1.34e+01%, Percentage 1.44e+02%, Percentage 1.61e+01%, Percentage 1.72e+02%, Percentage 1.96e+01%, Percentage 2.22e+01%, Percentage 2.54e+01%, Percentage 2.66e+01%, Percentage 2.78e+01%, Percentage 3.52e+01%, Percentage 3.86e+01%, Percentage 4.54e+01%, Percentage 9.59e+00%
DOI:10.13227/j.hjkx.201706110

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 98>

Accession number:20183705802967
Title:Combined Process of DNBF-O<inf>3</inf>-GAC for Nitrogen and Phosphorus and Metabolite Advanced Removal
Title of translation:DNBF-O<inf>3</inf>-GAC&#32452;&#21512;&#24037;&#33402;&#28145;&#24230;&#33073;&#38500;&#27694;&#30967;&#21450;&#20195;&#35874;&#20135;&#29289;
Authors:Zhong, Li-Yan (1, 2); Hao, Rui-Xia (1); Wang, Wei-Dong (1); Wan, Jing-Jing (1); Zhu, Xiao-Xia (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; (2) Huizhou City Huayu Water Resources and Hydropower Engineering Survey and Design Co., Ltd., Huizhou; 516003, China 
Corresponding author:Hao, Rui-Xia(haoruixia@bjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:247-255
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To improve the quality of the tailings water from a wastewater treatment plant (WWTP), a denitrification biofilter (DNBF) with a composite filler composed of a new slow-release organic-carbon source (SOC-F), sponge iron, and activated carbon was tested. Studies were conducted in the combined process of DNBF-O<inf>3</inf>-GAC to explore the efficiency of the advanced removal of nitrogen, phosphorus, and microbial metabolite by using synthetic effluent made from running water and chemicals. Corresponding comparative studies were conducted by using the secondary effluent from the WWTP. The microbial population structure in the biofilm of the denitrification biofilter was analyzed by adopting MiSeq high-throughput sequencing technologies. The results indicated that the combination process achieved high efficiency removal of nitrogen, phosphorus, and microbial metabolite. The average removal rate of NO<inf>3</inf><sup>-</sup>-N in the simulated and actual water period reached 88.87% and 79.99%, respectively; the average removal rate of TP reached 87.67% and 65.51%, respectively; and the average removal rate of UV<inf>254</inf>reached 45.51% and 49.23%, respectively. Each processing unit had different functions. The changes in NO<inf>3</inf><sup>-</sup>-N, TN, TP, and TFe mainly occurred in the denitrification biofilter, and the removal of UV<inf>254</inf> and the change in the three-dimensional fluorescence intensity mainly occurred in the ozone-activated carbon reactor. The cluster analysis at the genus level indicated that the denitrification system had sulfur autotrophic denitrifying bacteria and heterotrophic denitrifying bacteria. Sulfur autotrophic denitrification increased obviously in the actual water period when relatively lack of carbon sources, and the proportion of Thiobacillus increased from 7.44% to 29.62%. The complementary effect of sulfur autotrophic denitrification and heterotrophic denitrification had extended the use of the new slow-release carbon source.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Chemicals removal (water treatment)
Controlled terms:Activated carbon - Activated carbon treatment - Air pollution control - Bacteria - Biofilters - Biomolecules - Cluster analysis - Denitrification - Efficiency - Effluents  - Metabolites - Nitrogen - Nitrogen removal - Organic carbon - Phosphorus - Sponge iron - Sulfur - Throughput - Wastewater treatment
Uncontrolled terms:Autotrophic denitrification - Carbon filters - Heterotrophic denitrification - High-throughput sequencing - Microbial metabolites - Nitrogen and phosphorus - Three-dimensional fluorescences - Wastewater treatment plants
Classification code:451.2  Air Pollution Control - 452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 461.9  Biology - 545.1  Iron - 723  Computer Software, Data Handling and Applications - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.1  Organic Compounds - 913.1  Production Engineering
Numerical data indexing:Percentage 4.55e+01%, Percentage 4.92e+01%, Percentage 6.55e+01%, Percentage 7.44e+00% to 2.96e+01%, Percentage 8.00e+01%, Percentage 8.77e+01%, Percentage 8.89e+01%
DOI:10.13227/j.hjkx.201706070

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 99>

Accession number:20183705802985
Title:Distribution and Accumulation of Cadmium in Paddy Soil and Rice Affected by Pollutant Sources Control and Improvement Measures
Title of translation:&#25511;&#28304;&#21450;&#25913;&#33391;&#25514;&#26045;&#23545;&#31291;&#30000;&#22303;&#22756;&#21644;&#27700;&#31291;&#38217;&#32047;&#31215;&#30340;&#24433;&#21709;
Authors:Feng, Wen-Li (1); Guo, Zhao-Hui (1); Shi, Lei (1); Xiao, Xi-Yuan (1); Han, Xiao-Qing (1); Ran, Hong-Zhen (1); Xue, Qing-Hua (1) 
Author affiliation:(1) School of Metallurgy and Environment, Central South University, Changsha; 410083, China 
Corresponding author:Guo, Zhao-Hui(zhguo@csu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:399-405
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The objective of this study was to determine the effect of five scenarios on the accumulation of Cd in the soil-rice system, including the return of straw to the field and the lack of the return, atmospheric deposition control, use of clean water for irrigation, and the use of lime. For the field experiments, three typical paddies were selected and divided into five plots (5 m&times;6 m) in Xiangtan, Zhuzhou, and Liling in the Hunan province from April to October 2016. The results showed that the application of lime can increase pH by 0.87, while the available Cd concentration in the soil was decreased by 33.7%. The accumulations of Cd in roots, stems, and brown rice were decreased by 47.9%, 46.7%, and 54.8%, respectively, with a decrease in the corresponding bioconcentration factors. Irrigating with clean water and liming tended to increase the soil pH by 0.44 and 0.49, respectively, while the available Cd concentration in the soil was decreased by 18.2% and 14.5%, respectively. The Cd concentrations in roots, stems, and brown rice were decreased by 32.6%, 24.2%, and 18.0%, and 17.6%, 11.3%, and 25.4% with decreased bioconcentration factors under both treatments (irrigating with clean water and liming). The available Cd concentration in the soil was increased by 6.1% and the Cd accumulation in the rice plants also increased with the return of straw to the soil. The bioconcentration factors of the rice plants were also increased when the paddy straw was returned to the fields. The results showed that the measures, such as the use of lime, atmospheric deposition control, use of clean water for irrigation, and lack of the return of straw to the paddy soil, should be helpful for the safe production of brown rice. The possible long-term risks associated with returning straw to the paddy field should be evaluated scientifically.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Soil pollution
Controlled terms:Atmospheric chemistry - Bioaccumulation - Cadmium - Deposition - Irrigation - Lime - Meteorological problems - Soils
Uncontrolled terms:Atmospheric depositions - Bio-concentration factors - Cd concentrations - Field experiment - Improvement measure - Long-term risks - Paddy soils - Pollutant sources
Classification code:443.1  Atmospheric Properties - 461.9  Biology - 483.1  Soils and Soil Mechanics - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3  Chemical Operations - 804.2  Inorganic Compounds - 821.3  Agricultural Methods
Numerical data indexing:Percentage 1.13e+01%, Percentage 1.45e+01%, Percentage 1.76e+01%, Percentage 1.80e+01%, Percentage 1.82e+01%, Percentage 2.42e+01%, Percentage 2.54e+01%, Percentage 3.26e+01%, Percentage 3.37e+01%, Percentage 4.67e+01%, Percentage 4.79e+01%, Percentage 5.48e+01%, Percentage 6.10e+00%
DOI:10.13227/j.hjkx.201706233

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 100>

Accession number:20183705802953
Title:Effect of Phosphate on the Ammonium Removal Performance of Iron-Manganese Co-oxide Film in Surface Water Treatment
Title of translation:&#30967;&#37240;&#30416;&#23545;&#38081;&#38192;&#22797;&#21512;&#27687;&#21270;&#33180;&#21435;&#38500;&#22320;&#34920;&#27700;&#20013;&#27688;&#27694;&#30340;&#24433;&#21709;
Authors:Zhuo, Rui-Shuang (1); Huang, Ting-Lin (1); Zhang, Rui-Feng (1); Wen, Gang (1) 
Author affiliation:(1) 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:39
Issue:1
Issue date:January 15, 2018
Publication year:2018
Pages:137-144
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effect of phosphate on the ammonium removal performance of iron-manganese co-oxide film coated quartz sands in surface water treatment was investigated in a pilot-scale filtration system. The experimental results showed that the removal efficiency of ammonium decreased with reaction time without phosphate, while it stabilized at a level over 95.3% with phosphate dosing of 5-15 &mu;g&bull;L<sup>-1</sup> at a temperature between 17.2-21.9&#8451;. The effluent ammonium concentration of the filter columns exceeded the permitted limits for drinking water, when the water temperature was below 10.5&#8451;. Fortunately, it can meet the water standards by increasing the amount of dosed phosphate to 30 &mu;g&bull;L<sup>-1</sup> or increasing the height of the filter layer. However, the ammonium concentration in the effluent of the filter when only increasing the height of the filter layer exceeded the water standards after running for several days. The maximum safe concentration of ammonium in the influent of the filters with 120 cm and 80 cm height active filter beds were 2.34 and 1.95 mg&bull;L<sup>-1</sup> with the condition of 30 &mu;g&bull;L<sup>-1</sup> phosphate, respectively. Microorganism inactivation experiments indicated that the ammonium removal capability of the activated oxide film included catalytic oxidation and biological nitrification simultaneously. The total activity and catalytic oxidation activity of the activated oxide film were 1.36 times and 1.79 times higher than those without phosphate, respectively, which suggested that phosphate can facilitate the catalytic oxidation activity of the activated oxide film.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Chemicals removal (water treatment)
Controlled terms:Catalyst activity - Catalytic oxidation - Cobalt compounds - Effluents - Iron oxides - Manganese removal (water treatment) - Oxidation - Oxide films - Passive filters - Phosphates  - Potable water - Surface treatment - Surface waters - Water filtration - Water treatment plants
Uncontrolled terms:Ammonium - Ammonium concentrations - Ammonium removal - Biological nitrification - Catalytic oxidation activity - Filtration systems - Removal efficiencies - Water temperatures
Classification code:444  Water Resources - 444.1  Surface Water - 445.1  Water Treatment Techniques - 452.3  Industrial Wastes - 703.2  Electric Filters - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.95e-03kg/m3, Mass_Density 2.34e-03kg/m3, Mass_Density 3.00e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-06kg/m3 to 1.50e-05kg/m3, Percentage 9.53e+01%, Size 1.20e+00m, Size 8.00e-01m
DOI:10.13227/j.hjkx.201706004

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 101>

Accession number:20183905856829
Title:Emissions, Chemical Composition, and Spatial and Temporal Allocation of the BVOCs in the Yangtze River Delta Region in 2014
Authors:Liu, Yan (1, 2, 3); Li, Li (2, 3); An, Jing-Yu (2, 3); Zhang, Wei (1); Yan, Ru-Sha (2, 3); Huang, Ling (4); Huang, Cheng (2, 3); Wang, Hong-Li (2, 3); Wang, Qing (2, 3); Wang, Min (2, 3) 
Author affiliation:(1) School of Geography and Environment, Shandong Normal University, Ji'nan; 250014, China; (2) Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) State Environmental Protection Key Laboratory of the Cause and Prevention of Urban Air Pollution Complex, Shanghai; 200233, China; (4) Ramboll Environ, Shanghai; 200021, China 
Corresponding author:Li, Li(lili@saes.sh.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:608-617
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on the land surface vegetation data interpreted via remote sensing and the meteorological conditions predicted via the WRF model, the MEGAN model was applied to calculate the regional BVOC emissions in the Yangtze River Delta (YRD) in 2014. The chemical components and the temporal and spatial allocations were further analyzed. Results show that the annual BVOC emissions in the YRD were 1 886 kt, in which isoprene emissions were 704.2 kt (accounting for 37.3%), monoterpenes 303 kt (16.1%), and other VOCs 878.8 kt (46.6%). Seasonal variation of the BVOC emissions was very significant. The BVOC emissions had a strong seasonal pattern, with maximum emissions in summer, accounting for 60.9% (1 088 kt) of the total, whereas the minimum emissions occurred in winter, accounting for 3.2% (57 kt). Spatially, the southern YRD produced more BVOC emissions than the northern part did. In Zhejiang, Anhui, Jiangsu, and Shanghai, the BVOC emissions were 842 kt (44.6%), 760 kt (40.3%), 272 kt (14.4%), and 12 kt (0.7%), respectively. This is mainly related to the distribution of vegetation types.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:40
Main heading:Rivers
Controlled terms:Chemical analysis - Monoterpenes - Remote sensing - Vegetation
Uncontrolled terms:BVOCs - Emission inventories - MEGAN - Temporal and spatial - Yangtze river delta
Classification code:804.1  Organic Compounds
Numerical data indexing:Percentage 1.44e+01%, Percentage 1.61e+01%, Percentage 3.73e+01%, Percentage 4.03e+01%, Percentage 4.46e+01%, Percentage 4.66e+01%, Percentage 7.00e-01%
DOI:10.13227/j.hjkx.201703276

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 102>

Accession number:20183905856841
Title:Spatio-temporal Distribution and Source Apportionment of Nitrogen in Rivers of Tieling
Authors:Yang, Li-Biao (1); Lei, Kun (1); Qiao, Fei (1); Meng, Wei (1) 
Author affiliation:(1) State Environmental Protection Key Laboratory of Estuarine and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:711-719
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study analyzed the spatio-temporal distribution and sources of nitrogen (N) in 22 rivers in Tieling City during 2013-07-2014-07. The results showed that the concentrations of TN, NO<inf>3</inf><sup>-</sup>-N, and NH<inf>4</inf><sup>+</sup>-N were 1.26-18.85, 0.53-11.8, and 0.3-15.7 mg&bull;L<sup>-1</sup>, with an annual mean value of (5.8&plusmn;1.9) (2.8&plusmn;1.74), and (2.0&plusmn;1.1) mg&bull;L<sup>-1</sup>, respectively. Overall, NO<inf>3</inf><sup>-</sup>-N was the main form of N with a percentage of 48%. The concentration of N in the wet season was significantly higher than that in the normal and dry seasons. According to the standards for surface water quality, water quality in eight rivers was worse than grade &#8546;. Tiaozi River and Xiaoqing River were seriously polluted by ammonia N with a grade &#8548; water quality through the sampling period, while Xiliao River, Xiaohezi River, and Liao River met the water quality standards. During the sampling period, &delta;<sup>15</sup>N and &delta;<sup>18</sup>O in nitrate in river waters were -3.0&permil;-23.9&permil; and -11.7&permil;-57&permil;, respectively. Based on the data on the isotopes of N and O, N in the rivers in Tieling City mainly originated from human and animal excreta, industrial effluents, and domestic sewage. Sources of riverine N varied with seasons. For example, N in Tiaozi River and Nianpan River was mainly from fertilizer use and soil nitrogen in the wet season while it was from the industrial effluents and domestic sewage in the dry season.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:River pollution
Controlled terms:Ammonia - Drought - Effluents - Isotopes - Nitrogen - Nitrogen fertilizers - Pollution - Rivers - Sewage - Water quality
Uncontrolled terms:Domestic sewage - Industrial effluent - Sampling period - Source apportionment - Spatiotemporal distributions - Tieling City - Water quality standard - Xiaoqing rivers
Classification code:444  Water Resources - 445.2  Water Analysis - 452.1  Sewage - 452.3  Industrial Wastes - 453  Water Pollution - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 3.00e-04kg/m3 to 1.57e-02kg/m3, Percentage 4.80e+01%
DOI:10.13227/j.hjkx.201704279

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 103>

Accession number:20183905856777
Title:Effects of Magnetic Fe<inf>3</inf>O<inf>4</inf> Nanoparticles on the Characteristics of Anaerobic Granular Sludge and Its Interior Microbial Community
Authors:Su, Cheng-Yuan (1, 2); Zheng, Peng (1); Lu, Yu-Xiang (1); Yuan, Qiu-Hong (1); Zhao, Li-Jian (1); Liao, Li-Ming (1); Huang, Zhi (1) 
Author affiliation:(1) School of Environment and Resources, Guangxi Normal University, Guilin; 541004, China; (2) University Key Laboratory of Karst Ecology and Environmental Change of Guangxi, Guangxi Normal University, Guilin; 541004, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1316-1324
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this study, the effects of magnetic Fe<inf>3</inf>O<inf>4</inf> nanoparticles (Fe<inf>3</inf>O<inf>4</inf> NPs) on soluble microbial products (SMP), loosely bound extracellular polymeric substances (LB-EPS), and tightly bound extracellular polymeric substances (TB-EPS) in anaerobic granular sludge were examined. In addition, the anaerobic granular sludge interior microbial community dynamics were investigated using high-throughput sequencing. The results demonstrated that the removal rate of COD was 83.6% after long-term exposure in the experimental reactor, namely, the anaerobic reactor containing Fe<inf>3</inf>O<inf>4</inf> NPs. It was reduced by 5.7% in comparison with the removal rate in the control reactor. The total amount of TB-EPS in anaerobic granular sludge in the experimental and control reactors was 178.20 mg&bull;g<sup>-1</sup> and 138.24 mg&bull;g<sup>-1</sup>, respectively, while the total amount of SMP in anaerobic granular sludge was 34.88 mg&bull;L<sup>-1</sup> and 27.44 mg&bull;L<sup>-1</sup>, respectively. With regard to the LB-EPS in anaerobic granular sludge in the experimental reactor, the peak of humic acid disappeared and the peak intensity of coenzyme F<inf>420</inf> decreased slightly using excitation-emission matrix (EEM) fluorescence spectra. In terms of the microbial community dynamics in the experimental reactor, the abundance of Methanobacterium was greatly augmented from 76.15% to 86.76%; whereas, the abundance of Methanothrix decreased from 17.1% to 7.51%. This indicated that Methanothrix was more sensitive to Fe<inf>3</inf>O<inf>4</inf> NPs. Moreover, the changes in bacterial communities were evident: &#9312;the abundance of Proteobacteria dropped from 66.44% to 47.16%; &#9313; the abundance of Actinobacteria grew from 8.97% to 17.33%; and &#9314; the abundance of Bacteroidetes increased from 8.07% to 17.74%. The increasing abundance of Actinobacteria and Bacteroidetes plays a positive role in the anaerobic hydrolysis of organic matter.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Granular materials
Controlled terms:Biological materials - Experimental reactors - Iron oxides - Magnetite - Microorganisms - Nanomagnetics - Nanoparticles - Polymers
Uncontrolled terms:Anaerobic granular sludge - Extra cellular polymers - Fe3O4 nanoparticles - Long exposures - Microbial communities
Classification code:461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 621  Nuclear Reactors - 701.2  Magnetism: Basic Concepts and Phenomena - 761  Nanotechnology - 804.2  Inorganic Compounds - 815.1  Polymeric Materials - 933  Solid State Physics - 951  Materials Science
Numerical data indexing:Mass_Density 2.74e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 3.49e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.71e+01% to 7.51e+00%, Percentage 5.70e+00%, Percentage 8.07e+00% to 1.77e+01%, Percentage 8.36e+01%
DOI:10.13227/j.hjkx.201707138

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 104>

Accession number:20183905856834
Title:Pollution Characteristics and Health Risk Assessment of Volatile Organic Compounds (VOCs) and Semi-volatile Organic Compounds (SVOCs) in Qiantang River's Hangzhou Section During a Water Odor Pollution Event
Authors:Chen, Feng (1); Tang, Fang-Liang (1); Xu, Jian-Fen (1); Wang, Yi-Yi (1); Ruan, Dong-De (1); Zhang, Wei (1); Zhou, Shan (1) 
Author affiliation:(1) Hangzhou Environmental Monitoring Central Station, Hangzhou; 310007, China 
Corresponding author:Tang, Fang-Liang(tangfl001@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:648-654
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:For surface water samples collected from the Hangzhou section of Qiantang River (before, during, or after the occurrence of a water odor pollution event), 125 kinds of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs)were quantitatively determined via purge&amp;trap-gas chromatography-mass spectrometry and liquid-liquid extraction-gas chromatography-triple quadrupole mass spectrometry. Then, the pollution characteristics of the VOCs and SVOCs were analyzed, and the health risk of these compounds was assessed. The results showed that 17 VOCs and SVOCs in the surface water samples of 4 monitoring sections were detected, in a concentration range of 0.01-1.21 &mu;g&bull;L<sup>-1</sup>, which is a low pollution level. The concentration of dichloromethane was the highest of 17 VOCs and SVOCs, accounting for 36.3%, and it was thus clear that dichloromethane was the main contributing factor. During the water odor pollution event, the concentrations of VOCs and SVOCs were significantly higher than they were in the three months before or after the occurrence of the event, by 2.1-4.6 times, reflecting the strong external source input. In addition, human health risk assessment of ingestion through drinking water and absorption through skin contact was performed using US EPA recommended methods. It indicated that the total non-carcinogenic and total carcinogenic risks (&sum;HI and &sum;R) caused by VOCs and SVOCs are 2.4&times;10<sup>-3</sup>-3.6&times;10<sup>-2</sup> and 1.9&times;10<sup>-7</sup>-1.0&times;10<sup>-6</sup>, respectively, both of which belong to the acceptable risk level. Therefore, although &sum;HI and &sum;R during the occurrence of the odor event were significantly higher than those in the three months before or after the event, the VOCs and SVOCs detected will not cause obvious non-carcinogenic nor carcinogenic health effects on humans.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:River pollution
Controlled terms:Dichloromethane - Gas chromatography - Health - Health risks - Liquid chromatography - Mass spectrometry - Potable water - Risk assessment - Rivers - Surface waters  - Volatile organic compounds - Water absorption
Uncontrolled terms:Acceptable risk levels - Concentration ranges - Gas chromatography-mass spectrometry - Human health risk assessment - Liquid-liquid extraction - Qiantang River - Semi-volatile organic compounds (SVOCs) - Triple-quadrupole mass spectrometry
Classification code:444  Water Resources - 444.1  Surface Water - 453  Water Pollution - 461.6  Medicine and Pharmacology - 461.7  Health Care - 801  Chemistry - 802.3  Chemical Operations - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Mass_Density 1.00e-08kg/m3 to 1.21e-06kg/m3, Percentage 3.63e+01%
DOI:10.13227/j.hjkx.201706231

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 105>

Accession number:20183905856760
Title:Effect of Nutrient Loadings on the Regulation of Water Nitrogen and Phosphorus by Vallisneria natans and Its Photosynthetic Fluorescence Characteristics
Authors:Zhou, Yi-Wen (1, 2); Xu, Xiao-Guang (2); Han, Rui-Ming (2); Zhou, Xiao-Hong (1); Feng, De-You (1); Li, Zhi-Chun (2); Wang, Guo-Xiang (2) 
Author affiliation:(1) School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang; 212013, China; (2) School of Environment, Nanjing Normal University, Nanjing; 210008, China 
Corresponding author:Zhou, Xiao-Hong(xhzhou0214@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1180-1187
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Submerged macrophytes are an important component of aquatic ecosystems. During the growing period, submerged macrophytes can absorb nitrogen and phosphorus nutrients to reduce pollution loadings. Shoots of submerged macrophytes can also promote the adhesion of suspended substances in water, reducing the turbidity. The release of nutrients in sediments can be suppressed by its root system, and the resuspension of sediments caused by disturbance of winds and waves can also be resisted. The role of submerged macrophytes in ecological restoration of eutrophic lakes has attracted widespread attention. In 1960, the submerged plants Vallisneria natans and Potamogeton malaianus had been the dominant species in East Taihu. However after 2002, Nymphoides peltatum, Elodea nattalii, P. malaianus, etc. have gradually taken over the dominant roles along with significant elevations of nitrogen and phosphorus levels. Nutrients in water are not the only key factors causing eutrophication of water bodies; the nutrient source for submerged plant growth affect both the purification efficiency and the photosynthetic characteristics of submerged macrophytes. Excessive nitrogen and phosphorus concentrations can inhibit the photosynthetic physiological activities of submerged macrophytes, affecting the succession of aquatic vegetation. In addition, under high nutrient conditions, the competition from periphytic algae and planktonic algae may also directly poison submerged macrophytes, leading to its degradation and disappearance. Systematic studies on the regulation and photosynthetic fluorescence response mechanism of submerged macrophytes to varied nutrient loadings are helpful in revealing their relationships. The seedlings of submerged macrophyte V. natans were transplanted in a laboratory mesocosm to study the effect of nutrient loadings on its regulation of water nitrogen and phosphorus. Three nitrogen and phosphorus loadings from low, medium, and high levels derived from nitrate, ammonium, and phosphate were setup as the aquatic medium for the plant growth. Twelve harvests were carried out to determine the evolution of nutrient removal performance of V. natans. Its photosynthetic fluorescence characteristics were measured by a pulse-amplitude modulated fluorometer (Diving-PAM). Results showed that the nitrogen and phosphorus adsorption abilities of V. natans were gradually enhanced with the increase of nutrient concentrations in the range of TN&le;12 mg&bull;L<sup>-1</sup> and TP&le;1.0 mg&bull;L<sup>-1</sup>. In the treatment of high nutrient concentrations (TN=12 mg&bull;L<sup>-1</sup> and TP=1.0 mg&bull;L<sup>-1</sup>), the removal rates of nitrogen and phosphorus reached more than 95%. V. natans preferentially absorbed ammonium nitrogen when its concentration was high. The medium nutrient concentrations (TN: 8-12 mg&bull;L<sup>-1</sup> and TP: 0.6-1.0 mg&bull;L<sup>-1</sup>) did not significantly affect the F<inf>v</inf>/F<inf>m</inf> ratio of leaves. However, the low nutrient concentrations (TN=3 mg&bull;L<sup>-1</sup> and TP=0.3 mg&bull;L<sup>-1</sup>) could improve the F<inf>v</inf>/F<inf>m</inf> ratio of leaves and were beneficial for the growth of V. natans. The inhibition of photosynthetic activity and light tolerance were enhanced with the increase in nutrient concentrations. The photosynthetic activity of V. natans gradually recovered with no significant changes in the capacity for light harvesting, when the nutrient concentrations gradually decreased in the water. Our results indicate that the high nitrogen and phosphorus loadings indeed hamper the photosynthetic capacity, which may subsequently restrain the maintenance of the dominance of V. natans in the submerged macrophyte communities.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Nutrients
Controlled terms:Algae - Aquatic ecosystems - Eutrophication - Fluorescence - Nitrogen - Nitrogen removal - Phosphorus
Uncontrolled terms:Fluorescence characteristics - Nitrogen and phosphorus - Nutrient loading - Photosynthetic capacity - Photosynthetic characteristics - Pulse amplitude modulated fluorometers - Purification efficiency - Vallisneria
Classification code:454.3  Ecology and Ecosystems - 741.1  Light/Optics - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 6.00e-04kg/m3 to 1.00e-03kg/m3, Mass_Density 8.00e-03kg/m3 to 1.20e-02kg/m3, Percentage 9.50e+01%
DOI:10.13227/j.hjkx.201705111

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 106>

Accession number:20183905856862
Title:Sources and Risk Assessment of Polycyclic Aromatic Hydrocarbons from the Urbanization Process of Topsoil
Authors:Yao, Hong (1, 2); Zhang, Shi-Chao (1, 2); Liu, Ming-Li (1, 2); Wang, Jing (1, 2); Lu, Yin-Tao (1, 2); Yu, Xiao-Hua (1, 2) 
Author affiliation:(1) Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing; 100044, China; (2) Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing; 100044, China 
Corresponding author:Yu, Xiao-Hua(xhyu@bjtu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:889-898
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To study the effects of urbanization on concentration, sources, and health risks of polycyclic aromatic hydrocarbons (PAHs), 95 topsoil samples were collected from Liaoning Province. For this assessment, 21 PAHs were analyzed via gas chromatography-mass spectrometry and discussed. The results show the total concentrations of the 21 PAHs in background, Shen-Fu, Shen-Yang, and Fu-Shun were 1 496.76 &mu;g&bull;kg<sup>-1</sup>, 3 000.50 &mu;g&bull;kg<sup>-1</sup>, 8 705.11 &mu;g&bull;kg<sup>-1</sup>, and 8 178.90 &mu;g&bull;kg<sup>-1</sup>, respectively, which is positively correlated with the urbanization levels. Diagnostic ratios and PMF modal analysis indicate that the sources of the PAHs in soils were most likely coal combustion and traffic combustion (petroleum combustion). The main sources of PAHs in the four areas were petrochemical combustion (41.0%), coal combustion (64.4%), traffic combustion (67.5%), and traffic combustion (62.0%), that is, with the urbanization process, human activity (mainly traffic combustion) gradually become the major contributor of PAHs to the environment. Health risk assessment showed that the risk of cancer exposure through soil digestion and skin exposure was higher. There is a higher health risk from PAHs in urban soils, and the health risks associated with children and adolescents are greater than with other residents, requiring more attention.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Coal combustion
Controlled terms:Aromatization - Elementary particle sources - Gas chromatography - Health - Health risks - Hydrocarbons - Mass spectrometry - Mineral oils - Modal analysis - Petroleum analysis  - Polycyclic aromatic hydrocarbons - Risk assessment - Soils
Uncontrolled terms:Children and adolescents - Gas chromatography-mass spectrometry - Liaoning Province - Petroleum combustion - Polycyclic aromatic hydrocarbons (PAHS) - Topsoil - Urbanization - Urbanization levels
Classification code:461.6  Medicine and Pharmacology - 461.7  Health Care - 483.1  Soils and Soil Mechanics - 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 - 921  Mathematics
Numerical data indexing:Percentage 4.10e+01%, Percentage 6.20e+01%, Percentage 6.44e+01%, Percentage 6.75e+01%
DOI:10.13227/j.hjkx.201705178

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 107>

Accession number:20183905856857
Title:Quantitative Analysis of Dominant Pollutants in Secondary Effluent via Dye Probe Technology
Authors:Meng, Xiao-Rong (1, 2, 3); Wang, Cong-Hui (1, 3); Wang, Lei (1, 3); Wang, Xu-Dong (1, 3); Qiao, Ru-Kai (1, 3); Ren, Ting-Ting (2, 3); Tang, Wei-Ting (1, 3) 
Author affiliation:(1) School of Environmental &amp; Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) School of Science, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (3) Key Laboratory of Membrane Separation of Shannxi Province, Xi'an; 710055, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:852-858
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The linear relationship between the concentration of either bovine serum albumin (BSA) or sodium alginate (SA) and the intensity of a resonance light scattering (RLS) spectrum was established by using Congo red and neutral red as the dye probes, respectively. Moreover, the linear relationship between the concentration of humic acids (HA) and UV absorbance was determined by using toluidine blue (TB) as the dye probe. The detection of concentration range and the pH value of three kinds of standard substances were optimized. The recovery rate of bi- and tri-element samples of the standard objects was investigated by means of the dye probe analysis method. The results show that, in the appropriate concentration range, the linear correlation coefficients between the concentration of BSA, HA, or SA and the intensity of its corresponding dye probe spectrum were all high, at 0.98. The recovery rates of the three kinds of standard objects in mixed samples were all greater than 95%, and the standard errors were all less than 0.11%. Based on qualitative analysis of the proteins, polysaccharides, and humic acids in the secondary water discharge samples of urban sewage obtained via UV and RLS spectra, the dominant pollutants were confirmed in the four kinds of secondary effluent. The relative deviations of the concentration of polysaccharides and proteins measured using the dye probe technique and the national standard method ranged were from 1.2% to 0.04%.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Probes
Controlled terms:Azo dyes - Body fluids - Effluents - Light scattering - Organic acids - Polysaccharides - Proteins - Sewage - Sodium alginate - Water pollution
Uncontrolled terms:Dye probes - Organics - Resonance light scattering - Secondary effluent - UV spectrophotometry
Classification code:452.1  Sewage - 452.3  Industrial Wastes - 453  Water Pollution - 461.2  Biological Materials and Tissue Engineering - 741.1  Light/Optics - 804.1  Organic Compounds
Numerical data indexing:Percentage 1.10e-01%, Percentage 1.20e+00% to 4.00e-02%, Percentage 9.50e+01%
DOI:10.13227/j.hjkx.201705052

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 108>

Accession number:20183905856817
Title:Ozone Formation Potential and Priority Species of VOCs in an Industrial Park
Authors:Wu, Lei-Dan (1); Wang, Xiu-Yan (1); Yang, Wen (2); Guo, Feng-Yan (2); Liu, Jin (1) 
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:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:511-516
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Ground-level ozone (O<inf>3</inf>) pollution is a serious problem in major cities in China. The control of its precursors, volatile organic compounds (VOCs), is a key to limiting ozone production. The ozone formation potential of VOCs in an industrial park in Tianjin was studied by collecting gas samples at the factory boundaries of six representative enterprises. The PTR-TOF-MS was used to analyze VOCs quantitatively. The VOCs/NO<inf>x</inf> ratio was used to determine the control strategies. The priority VOCs were selected based on the entropy method. Our results indicated that, the ozone formation potential concentration of enterprise F was the highest with the concentration of 0.423 3 mg&bull;m<sup>-3</sup> using the propylene-equivalent concentration (PEC) scale; the highest concentration was obtained at enterprise C with 1.573 3 mg&bull;m<sup>-3</sup> using maximum incremental reactivity(MIR) scale. The result of PEC scale is closer to the O<inf>3</inf> concentration, which is applicable to the study of ozone generation in this industrial park. Ozone production is sensitive to both VOCs and NO<inf>x</inf> in this industrial park, joint control should be considered. Alkanes contributed most to ozone formation, followed by alkenes &amp; alkynes, alcohols, and aromatics. The prior VOC species that need to be controlled include n-heptane and its isomers, n-nonane, n-octane and its isomers, undecane, pentane, n-decane, and methanol.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Air pollution
Controlled terms:Heptane - Isomers - Ozone - Paraffins - Propylene - Volatile organic compounds
Uncontrolled terms:Control strategies - Equivalent concentrations - Ground-level ozone - Maximum incremental reactivities - Ozone formation potentials - Ozone generation - Ozone production - Priority pollutants
Classification code:451  Air Pollution - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201707106

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 109>

Accession number:20183905856854
Title:Adsorption Performance and Mechanism of HZO@SGH for the Removal of Fluoride from Aqueous Solution
Authors:Ma, Fu-Zhen (1); Zhou, Shao-Qi (1, 2, 3); Liu, Ze-Jun (1); Zhi, Liang-Liang (1); Zhou, Xuan (1) 
Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Guizhou Academy of Sciences, Guiyang; 550001, China; (3) State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou; 510640, China 
Corresponding author:Zhou, Shao-Qi(fesqzhou@scut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:828-837
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Three-dimensional porous composites based on hydrous zirconium oxide and self-assembled graphene hydrogels (HZO@SGH) were successfully synthesized via homogeneous precipitation. HZO@SGH was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) to investigate the morphology and the defluoridation mechanism. The adsorption performance and mechanism of HZO@SGH for fluoride was investigated via batch adsorption experiments. The results revealed that the adsorption capacity of HZO@SGH for fluoride was obviously higher than that of HZO or SGH singly. The adsorption data for fluoride onto HZO@SGH complied with the pseudo-second-order kinetic model, indicating that the adsorption rate was mainly controlled by chemical adsorption. The adsorption process could be described well with the Dubinin-Radushkevich isotherm model, as the maximum adsorption capacity was approximately 31.79 mg&bull;g<sup>-1</sup>, which is higher than that of some zirconium-containing adsorbents, as previously reported. HZO@SGH showed excellent adsorption properties in the fluoride solution contained NO<inf>3</inf><sup>-</sup>, Cl<sup>-</sup>, and a low concentration of SO<inf>4</inf><sup>2-</sup> (&le;10 mg&bull;L<sup>-1</sup>) at low pH (3-6.5). The preparation of HZO@SGH was convenient and environmentally friendly, as it was easily separated from the fluoride solution and did not cause secondary pollution. Hence, the prospect of HZO@SGH in practice was brilliant.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Adsorption
Controlled terms:Dyes - Fluorine compounds - Fourier transform infrared spectroscopy - Graphene - Hydrogels - Isotherms - Kinetic parameters - Kinetic theory - Oxides - Scanning electron microscopy  - Solutions - X ray photoelectron spectroscopy - Zirconium compounds
Uncontrolled terms:Adsorption capacities - Adsorption performance - Batch adsorption experiments - Fluoride - Graphene hydrogels - Homogeneous Precipitation - Isotherm modeling - Pseudo-second-order kinetic models
Classification code:801  Chemistry - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 931  Classical Physics; Quantum Theory; Relativity
DOI:10.13227/j.hjkx.201705291

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 110>

Accession number:20183905856849
Title:Relationship Between Macrophyte Communities and Macroinvertebrate Communities in an Urban Stream
Authors:Qu, Xiao-Dong (1, 2); Yu, Yang (2); Zhang, Min (2); Duan, Long-Fei (3); Peng, Wen-Qi (1, 2) 
Author affiliation:(1) China Institute of Water Resource and Hydropower Research, Beijing; 100038, China; (2) State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing; 100038, China; (3) Haihe River Water Conservancy Commission, Yinluan Project Management Bureau, Tangshan; 064300, China 
Corresponding author:Peng, Wen-Qi(pwq@iwhr.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:783-791
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The channelization has caused severe degradation of aquatic ecosystems during the past decades of rapid urbanization in metropolitan areas of China. The re-construction of the in-stream habitat of aquatic organisms and the restoration of aquatic ecosystems were more difficult in the urban stream than in the natural stream with the effluence of nutrient enrichment, water contamination, and in-stream habitat loss. Considering the ecological effects of the submerged macrophyte replantation on macroinvertebrate communities, one of the urban streams that used replantation restoration strategy was seasonally monitored from October 2012 to July 2013. There were four sampling sites, two located at the upper region and two in the middle region. Due to the relatively high levels of organic matter contamination, there are no sites in the downstream region of Qinghe River. Four types of submerged macrophyte were planted at each site to restore the in-stream habitat of two years ago, including Potamogeton pectinatus, Potamogeton crispus, Hydrilla verticillate, and Ceratophyllum demersum. Because of the unexpected development, Myriophyllum spicatum and Acorus calamus appeared at the upper reach of Qinghe River. Considering the average water depth of 30-40 cm, the revised Surber net with the enlarged net was used to collect macroinvertebrate samples. At each sampling site, three replicates of macroinvertebrates were carefully collected for each type of macrophyte. Three replicates were sampled for the comparison at the imperviously concrete sections of each site. The community composition of the macroinvertebrate was determined by cluster analysis and ordination analysis. The density, biodiversity, and community stability were higher in the sampling sections with the replantation of macrophyte than in impervious concrete sections. The occurrence of intermediate tolerant taxa such as Ephemera sp., Caenis sinensis Gui, Ecnomus sp., and Hydropsyche sp. indicated the recovery and restoration of macroinvertebrates in Qinghe River. However, the differences in the community structure, density, taxa richness, biodiversity index, and the composition of functional feeding groups of macroinvertebrates among different types of submerged macrophyte were not identified. Unlike providing extra habitats for macroinvertebrates in the vertical direction in natural streams and lakes, the submerged macrophyte provided more stable benthic habitats in urban streams. The stem and leaf of macrophytes could adjust the hydraulics and continually absorb, fix, and accumulate the suspended solids in the sediment and water interface. The root systems could stabilize the microhabitat of the sediment for macroinvertebrates, benthic algae, and microorganisms. Those aquatic organisms played an important role in the decomposition, transformation, and mineralization of nutrients and organic matter in urban streams. Following the recovery of stabilized microhabitats, community restoration and secondary succession of macroinvertebrates could continually and slowly happen. This study improved the understanding of the ecological effects of macrophytes on the restoration of aquatic organisms and ecosystems in urban streams.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Aquatic organisms
Controlled terms:Aquatic ecosystems - Biodiversity - Biogeochemistry - Biological materials - Cluster analysis - Concretes - Nutrients - Organic compounds - Restoration - River pollution  - Rivers - Secondary recovery - Stream flow - Suspended sediments
Uncontrolled terms:Ecological restoration - Macroinvertebrates - Microhabitats - Replantation - Urban stream
Classification code:407.2  Waterways - 412  Concrete - 453  Water Pollution - 454  Environmental Engineering - 454.3  Ecology and Ecosystems - 461.2  Biological Materials and Tissue Engineering - 471  Marine Science and Oceanography - 481.2  Geochemistry - 483  Soil Mechanics and Foundations - 511.1  Oil Field Production Operations - 723  Computer Software, Data Handling and Applications - 804.1  Organic Compounds
Numerical data indexing:Size 3.00e-01m to 4.00e-01m
DOI:10.13227/j.hjkx.201708082

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 111>

Accession number:20183905856752
Title:Seasonal Difference in Water Quality Between Lake and Inflow/Outflow Rivers of Lake Taihu, China
Authors:Zha, Hui-Ming (1, 2); Zhu, Meng-Yuan (2); Zhu, Guang-Wei (2); Yang, Zhou-Sheng (1); Xu, Hai (2); Shen, Rui-Jie (2); Zhong, Chun-Ni (2) 
Author affiliation:(1) College of Environmental Science and Engineering, Anhui Normal University, Wuhu; 241003, China; (2) Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Environment and Science, Chinese Academy of Sciences, Nanjing; 210008, China 
Corresponding author:Yang, Zhou-Sheng(yzhoushe@mail.ahnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1102-1112
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The seasonal and spatial variation of external nutrient loading from rivers and their impact on lake water quality were analyzed in Lake Taihu, China, using the monthly monitoring data from 16 major inflow/outflow rivers and 32 observation sites in the lake. The results showed: &#9312; The average monthly values of total nitrogen (TN), dissolved total nitrogen (DTN), total phosphorus (TP), and dissolved total phosphorus (DTP) in rivers were all higher than the corresponding areas in the lake. Significant positive correlations were found between nutrient concentrations in the inflow rivers and the corresponding areas in the lake, indicating the pronounced impact of external loading on lake water. &#9313; Remarkable seasonal variations of nutrient concentration were found both in the rivers and in the lake. The highest TN and TP concentrations in inflow rivers were 4.82 mg&bull;L<sup>-1</sup> (March) and 0.218 mg&bull;L<sup>-1</sup> (December), while the highest TN and TP concentrations in the lake were 4.13 mg&bull;L<sup>-1</sup> and 0.255 mg&bull;L<sup>-1</sup> in July. &#9314; Extreme rainfall events could decrease the nutrient concentration in the rivers in the short-term, but finally would increase the external loading of nutrients, and indicated disadvantages for the restoration of Lake Taihu. Our study concluded that inflow pollution showed an obvious "shaping effect" on the seasonal and spatial distribution of water quality indicators in large and shallow lakes. Additionally, the self-purification ability of lakes, wind-induced accumulation and migration of algae, as well as the sediment resuspension under the prevailing winds in different seasons, all have vital effects on nutrient concentrations and their spatial-temporal variations.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:43
Main heading:River pollution
Controlled terms:Hydrodynamics - Lakes - Loading - Nitrogen - Nutrients - Phosphorus - Rivers - Water quality
Uncontrolled terms:Algal blooms - External loading - Lake taihu - Nutrient concentrations - Positive correlations - Seasonal and spatial distributions - Sediment re suspensions - Spatial temporals
Classification code:445.2  Water Analysis - 453  Water Pollution - 691.2  Materials Handling Methods - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 2.18e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 2.55e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 4.13e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 4.82e-03kg/m3 to 2.20e-02kg/m3
DOI:10.13227/j.hjkx.201707184

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 112>

Accession number:20183905856748
Title:Fate and Origin of Major Ions in River Water in the Lhasa River Basin, Tibet
Authors:Zhang, Qing-Hua (1, 2); Sun, Ping-An (2); He, Shi-Yi (2); Wen, Hua (3); Liu, Ming-Long (3); Yu, Shi (2) 
Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Key Laboratory of Karst Dynamics, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (3) Lhasa Hydrologic Experiment Station, Lhasa; 851400, China 
Corresponding author:Yu, Shi(yushi@karst.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1065-1075
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to understand the temporal and spatial variations of major ions in water and their sources in the Lhasa River Basin, water samples were collected monthly at the hydrological station in the Lhasa River from August 2014 to July. The results show that HCO<inf>3</inf><sup>-</sup>is the dominant anion in the water of the Lhasa River, which accounts for 68.73% of the anions, followed by SO<inf>4</inf><sup>2-</sup>. Ca<sup>2+</sup> is the dominant cation, which accounts for 67.75% of the cations, followed by Mg<sup>2+</sup>. The pH values of the river water range between 8.31 and 8.90, with a mean of 8.59 throughout the year, generally showing alkaline water. The highest pH values occur in summer, which is probably due to the photosynthesis of aquatic plants and the growth of phytoplankton. Electrical conductivity (EC) varies between 155.0 and 257.0 &mu;S&bull;cm<sup>-1</sup>, with a mean of 210.5 &mu;S&bull;cm<sup>-1</sup>. Because of the frequent uplift of the Tibetan Plateau that enhanced the mechanical weathering of rocks and mineral dissolution, the total dissolved solid (TDS) concentration, at an average of 181.35 mg&bull;L<sup>-1</sup>, is significantly higher than the average value of rivers around the world. The Lhasa River is recharged by surface runoff, so the concentrations of major ions in water are higher during winter, but lower in summer. An ion source analysis indicates that Ca<sup>2+</sup>, Mg<sup>2+</sup>, and HCO<inf>3</inf><sup>-</sup> are mainly derived from chemical weathering of carbonate minerals, Cl<sup>-</sup>, SO<inf>4</inf><sup>2-</sup>, and NO<inf>3</inf><sup>-</sup> are mainly affected by precipitation and rock weathering. Furthermore, the concentrations of major ions in the water have a negative correlation with the river discharge rate, which suggests there might be a dilution effect occurring during the rainy season.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:49
Main heading:Weathering
Controlled terms:Alkalinity - Chemical analysis - Hydrochemistry - Ion sources - Minerals - Negative ions - pH - Positive ions - Precipitation (chemical) - Rivers  - Watersheds
Uncontrolled terms:Carbonate weathering - Electrical conductivity - Lhasa rivers - Mechanical weatherings - Negative correlation - Temporal and spatial variation - Tibet - Total dissolved solids
Classification code:444.1  Surface Water - 481.2  Geochemistry - 482.2  Minerals - 801.1  Chemistry, General - 802.3  Chemical Operations - 932.1  High Energy Physics
Numerical data indexing:Electrical_Conductivity 1.55e-02S/m to 2.57e-02S/m, Electrical_Conductivity 2.11e-02S/m to 2.20e-01S/m, Mass_Density 1.81e-01kg/m3 to 2.20e-02kg/m3, Percentage 6.78e+01%, Percentage 6.87e+01%
DOI:10.13227/j.hjkx.201706239

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 113>

Accession number:20183905856756
Title:Vertical Distribution of Fungal Community Composition and Water Quality During the Deep Reservoir Thermal Stratification
Authors:Shang, Pan-Lu (1); Chen, Sheng-Nan (1); Huang, Ting-Lin (1); Zhang, Hai-Han (1); Kang, Peng-Liang (1); Wang, Yue (1); Zhao, Zhen-Fang (1); Liu, Tong-Tong (1) 
Author affiliation:(1) 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.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1141-1150
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Freshwater fungal community composition plays pivotal roles in sustaining the function and health of drinking water reservoir ecosystems. To investigate the vertical evaluative characteristics of an aquatic fungal community under conditions of stable thermal stratification, water samples were collected at 0.5, 10, 25, 40, 60 and 70 m depths of Jinpen Reservoir during thermal stratification. Fungal community composition was determined using a high-throughput DNA sequencing technique and combined with water quality parameters. The results showed that the epilimnion, metalimnion, and hypolimnion water layers were formed in Jinpen Reservoir. The temperature decreased steadily from the surface at 22.33&#8451; to the bottom with 7.21&#8451; (P&lt;0.05). The dissolved oxygen (DO) concentration decreased significantly from the surface to the bottom (P&lt;0.05). The conductivity and the concentration total phosphorus and iron increased significantly from the surface to the bottom (P&lt;0.05). The high-throughput DNA sequencing revealed a total of 1 247 operational taxonomic units (OTUs), which were affiliated with four phylum, 14 classes, and 39 genera, including Zygomycota, Basidiomycota, Ascomycota, and Chytridiomycota. The highest Shannon diversity and Chao 1 were 3.45 and 360 at 60 m, respectively. The Shannon diversity and Chao 1 were significantly higher in the hypolimnion than in the metalimnion (P&lt;0.05). Rhodotorula (27.23%), Alternaria (24.28%),Cladosporium (22.98%), Alternaria (32.00%), Didymella (17.47%), and Cladosporium (28.17%) were the dominant species at 0.5 m, 10 m, 25 m, 40 m, 60 m, and 70 m, respectively. There are a number of unclassified fungi at different water depths. The heat map profile indicated significant differences in the vertical distribution of the fungal community composition in Jinpen Reservoir. A principle component analysis (PCA) indicated that water temperature, DO, TP, and conductivity had dramatic influences on the vertical distribution of the fungal community composition. The results provide new insights on the relationship between water quality and fungal community composition during reservoir thermal stratified periods.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:44
Main heading:Fungi
Controlled terms:Aquatic organisms - Biochemical oxygen demand - Dissolved oxygen - DNA sequences - Gene encoding - Potable water - Principal component analysis - Reservoirs (water) - Thermal stratification - Throughput  - Water quality
Uncontrolled terms:Deep reservoirs - Dissolved oxygen concentrations - Fungal community - Fungal community compositions - High-throughput sequencing - Operational taxonomic units - Principle component analysis - Water quality parameters
Classification code:441.2  Reservoirs - 444  Water Resources - 445.2  Water Analysis - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 471  Marine Science and Oceanography - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.75e+01%, Percentage 2.30e+01%, Percentage 2.43e+01%, Percentage 2.72e+01%, Percentage 2.82e+01%, Percentage 3.20e+01%, Size 1.00e+01m, Size 2.50e+01m, Size 4.00e+01m, Size 5.00e-01m, Size 6.00e+01m, Size 7.00e+01m
DOI:10.13227/j.hjkx.201706291

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 114>

Accession number:20183905856837
Title:Source Analysis and Environmental Health Risk Assessment of VOCs in Furniture Manufacturing
Authors:Tong, Rui-Peng (1); Zhang, Lei (1); Yang, Xiao-Yi (1); Zhu, Xu-Bo (2); Ren, Chuan-Geng (2) 
Author affiliation:(1) School of Resources &amp; Safety Engineering, China University of Mining and Technology (Beijing), Beijing; 100083, China; (2) China Resources Land Limited, Shenzhen; 518001, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:672-683
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Regarding furniture manufacturing, scholars have only studied the sources of VOCs in the spraying process, yet the main concern is the release of VOCs after the completion of the manufacturing process and its impact on indoor air quality. Therefore, in this study, the sources of VOCs for the entire process of furniture manufacturing were explored and probabilistic risk models were improved. Then, the carcinogenicity and non-carcinogenic health risks to workers at nine workstations in a furniture factory were evaluated via a Monte Carlo simulation method, and the sensitivity of each exposure parameter was analyzed. The results are as follows. The various types of paints, diluents, and curing agents used in the process of spraying primer paint and spraying surface paint release VOCs, such as benzene, toluene, xylene, styrene, butanone, cyclohexanone, butyl acetate, and ethyl acetate. The glue used in the leather pasting process, the glue process, and the viscose process generates VOCs, such as dichloromethane and ethyl acetate, and the paint remover used in the cleaning process emits dichloromethane. The carcinogenic risk at each station was more than 10<sup>-6</sup>. For benzene exposure, the probability of exceeding 10<sup>-6</sup> was greater than 95% for all stations, excluding SWB, SWP, and CWP. The carcinogenicrisk of workers exposed to benzene was the highest at SWS, at 3.07&times;10<sup>-6</sup>&plusmn;1.73&times;10<sup>-6</sup>, and the carcinogenicrisk of workers exposed to dichloromethane was the greatest at SWL, with a value of 5.14&times;10<sup>-6</sup>&plusmn;2.70&times;10<sup>-6</sup>. The only non-carcinogenicrisk greater than 1 was to SWS workers. The parameters that had the greatest impact on the carcinogenic risk assessment were exposure day (ED), concentration (C), exposure time (ET), and exposure frequency (EF). In the non-carcinogenic risk assessment, the most influential variables were ED, ET, and EF. In addition, concentration also had a significant impact on the evaluation results.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Risk assessment
Controlled terms:Air quality - Benzene - Cleaning - Dichloromethane - Furniture manufacture - Glues - Gluing - Health risks - Indoor air pollution - Intelligent systems  - Ketones - Monte Carlo methods - Paint - Paint spraying - Solvents - Styrene - Volatile organic compounds
Uncontrolled terms:Carcinogenic risk assessments - Environmental health risk assessment - Exposure parameters - Furniture manufacturing - Manufacturing process - Monte Carlo simulation methods - Probabilistic risk - Source
Classification code:451  Air Pollution - 451.2  Air Pollution Control - 461.7  Health Care - 723.4  Artificial Intelligence - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds - 813.1  Coating Techniques - 813.2  Coating Materials - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 9.50e+01%
DOI:10.13227/j.hjkx.201710114

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 115>

Accession number:20183905856850
Title:Characteristics of Nitrogen and Phosphorus Output in Runoff and Rainfall Runoff in Lanlingxi Watershed, Three Gorges Reservoir Area
Authors:Zhang, Lin (1); Huang, Zhi-Lin (1, 2); Xiao, Wen-Fa (1); Zeng, Li-Xiong (1); Song, Wen-Mei (3) 
Author affiliation:(1) Key Laboratory of Forest Ecology and Environment, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing; 100091, China; (2) Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing; 210037, China; (3) Forestry Bureau of Zigui Country, Yichang; 443600, China 
Corresponding author:Huang, Zhi-Lin(hzlin66@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:792-799
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The small watershed of an agroforestry system in the Lanlingxi watershed in the Three Gorges Reservoir area was studied by performing continuous monitoring of nitrogen and phosphorus output and concentrations and analyzing the changes in the output of nitrogen and phosphorus in runoff and its response to different rainfall conditions. The results showed that: &#9312;The total runoff loss was 50.92&times;10<sup>4</sup> m<sup>3</sup> in this watershed during the rainy season, with 52.43 kg&bull;hm<sup>-2</sup> lost by total nitrogen, including nitrate nitrogen (30.26 kg&bull;hm<sup>-2</sup>) and particulate nitrogen (21.61 kg&bull;hm<sup>-2</sup>), and 0.06 kg&bull;hm<sup>-2</sup> and 0.10 kg&bull;hm<sup>-2</sup>lost by ammonium nitrogen and total phosphorus; &#9313;The distribution of rainfall has the characteristics of stage and strong rainfall during the wet season was the main driving force of soil nutrient output. Rainfall runoff contributed to 88% of total nitrogen loss and 90% of total phosphorus loss in the rainy season; &#9314;The main path of nitrogen and phosphorus loss in the rainy season was the surface runoff caused by rainfall, accounting for 68% of total nitrogen loss and 74% of total phosphorus loss; &#9315;Nitrate nitrogen concentrations showed a negative correlation with rainfall runoff and the output was mainly distributed in the later runoff process. Ammonium nitrogen and total phosphorus concentrations were positively correlated with rainfall and both were mainly distributed in the early stage of the runoff process; &#9316;The concentrations of total nitrogen in this watershed exceeded the standard values. The water quality in the rainfall and the non-rainfall period was worse than Grade &#8548;.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Water pollution
Controlled terms:Forestry - Nitrates - Phosphorus - Rain - Reservoirs (water) - Runoff - Water quality - Watersheds
Uncontrolled terms:Continuous monitoring - Negative correlation - Nitrogen and phosphorus - Nitrogen and phosphorus loss - Non-point source pollution - Rainfall and runoffs - Returning farmland to forest - Three gorges reservoir area
Classification code:441.2  Reservoirs - 443.3  Precipitation - 444.1  Surface Water - 445.2  Water Analysis - 453  Water Pollution - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 6.80e+01%, Percentage 7.40e+01%, Percentage 8.80e+01%, Percentage 9.00e+01%
DOI:10.13227/j.hjkx.201706287

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 116>

Accession number:20183905856845
Title:Spatial Distribution, Sources and Bioavailability of Heavy Metals in the Surface Sediments of Longjiang River, Southern China
Authors:Lan, Xiao-Long (1, 2); Ning, Zeng-Ping (1); Xiao, Qing-Xiang (1, 2); Huang, Zheng-Yu (1, 2); Liu, Yi-Zhang (1); Xiao, Tang-Fu (1, 3); Zhao, Yan-Long (1, 4); Wu, Shi-Liang (4) 
Author affiliation:(1) State Key Laboratory of Environmental Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory for Water Quality and Conservation of the Pearl River Delta, School of Environmental Science and Engineering, Guangzhou University, Guangzhou; 510006, China; (4) Water Resources Protection Bureau of Pearl River Water Resources Commission, Guangzhou; 510611, China 
Corresponding author:Ning, Zeng-Ping(ningzengping@mail.gyig.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:748-757
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to evaluate the pollution status, possible sources, and bioavailability of heavy metals (As, Cd, Pb, Sb, Zn, and Tl), 33 surface sediments were collected from Longjiang River, Southern China. The total concentrations and potential bioavailable concentrations of the heavy metals were analyzed using ICP-MS. Enrichment factors (EFs), Pearson correlation analysis, and principal component analysis (PCA) were used to further assess their pollution degree and potential sources. Results showed that the surface sediments of Longjiang River have been suffering heavy metal (As, Cd, Pb, Sb, and Zn) pollution to different degrees. The maximum concentrations of As, Cd, Pb, Sb, and Zn were 67.0, 7.42, 227, 229, and 807 mg&bull;kg<sup>-1</sup>, respectively, while the Tl concentration were very low, with little variation. Moreover, the polluted sites were mostly located in the mid-lower of the main stem and in tributaries (Dongxioajiang and downstream of Dahuanjiang), and the pollution degree of the heavy metals, in a descending order, were Cd&gt;Sb&gt;Zn&gt;Pb&gt;As&gt;Tl. Pearson correlation analysis and PCA indicated that As, Cd, Pb, Sb, and Zn predominantly originated from anthropogenic inputs, including nonferrous metal mining and smelting, municipal sewage, and agricultural activities, and Tl mostly derived from natural rock weathering. The bioavailability of heavy metals in the sediments tended to be controlled by their sources. The percentages of bioavailable heavy metals (As, Cd, Pb, Sb, and Zn) in the highly anthropogenic impacted areas (the mid-lower of the main stem and downstream of Dongxiaojiang tributary) were also high, with the average percentages of bioavailable As, Cd, Pb, Sb, and Zn of 26%, 51%, 49%, 38%, and 47%, respectively. High EF values and high bioavailable percentages of heavy metals easily and greatly cause high ecological risk of Longjiang River.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:River pollution
Controlled terms:Biochemistry - Correlation methods - Elementary particle sources - Heavy metals - Lead smelting - Metal analysis - Principal component analysis - Rivers - Sewage - Spatial distribution  - Surficial sediments - Weathering - Zinc smelting
Uncontrolled terms:Agricultural activities - Anthropogenic inputs - Bioavailability - Bioavailable concentrations - Enrichment factors - Maximum concentrations - Pearson correlation analysis - Potential sources
Classification code:452.1  Sewage - 453  Water Pollution - 483  Soil Mechanics and Foundations - 531  Metallurgy and Metallography - 533.2  Metal Refining - 801.2  Biochemistry - 921  Mathematics - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 2.60e+01%, Percentage 3.80e+01%, Percentage 4.70e+01%, Percentage 4.90e+01%, Percentage 5.10e+01%
DOI:10.13227/j.hjkx.201705288

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 117>

Accession number:20183905856769
Title:Emission Inventory of Greenhouse Gas from Urban Wastewater Treatment Plants and Its Temporal and Spatial Distribution in China
Authors:Yan, Xu (1); Qiu, De-Zhi (1); Guo, Dong-Li (1); Qi, Xing-Hao (1); Zheng, Shi-Kan (1); Cheng, Ke (1); Sun, Jian-Hui (1); Liu, Jian-Wei (2) 
Author affiliation:(1) Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China; (2) Research Center of Beijing Sustainable Urban Drainage System Construction and Risk Control Engineering Technology, College of Environmental 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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1256-1263
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Urban wastewater treatment plants are considered important greenhouse gas resources with massive emissions of carbon dioxide (CO<inf>2</inf>), methane (CH<inf>4</inf>), and nitrous oxide (N<inf>2</inf>O) during operation. Based on the emission factor approach of pollutant reduction, the 2014 emission inventory of greenhouse gases (CO<inf>2</inf>, CH<inf>4</inf>, and N<inf>2</inf>O) from urban wastewater treatment plants in China was established. In addition, the temporal and spatial distribution and influencing factors of greenhouse gas emissions were analyzed in this study. The results showed that total emissions of greenhouse gas from urban wastewater treatment plants in China was 7 348.60 Gg (CO<inf>2</inf>-eq) in 2014, which included CO<inf>2</inf>, CH<inf>4</inf>, and N<inf>2</inf>O emissions of 6 054.57 Gg, 27.47 Gg (769.08 Gg, CO<inf>2</inf>-eq), and 1.98 Gg (524.95 Gg, CO<inf>2</inf>-eq), respectively. The difference in greenhouse gas emissions among provinces was significant: high emissions appeared in the eastern areas of China, low emissions were observed in the northwest, and hardly any emissions were found in Xizang. From 2005 to 2014, annual greenhouse gas emissions from urban sewage treatment plants in China increased by 229.4%, and the rates of CO<inf>2</inf>, CH<inf>4</inf>, and N<inf>2</inf>O increased by 217.9%, 217.9%, and 520.3%, respectively. The regional economic development level and number of wastewater treatment plants were correlated the most with the emissions of greenhouse gasses, and the per-capita protein supply was closely related with the N<inf>2</inf>O emission.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:47
Main heading:Wastewater treatment
Controlled terms:Carbon dioxide - Economics - Energy resources - Gas emissions - Gas plants - Greenhouse gases - Nitrogen oxides - Petroleum deposits - Reclamation - Regional planning  - Sewage pumping plants - Sewage treatment plants - Spatial distribution - Water treatment plants
Uncontrolled terms:Emission factors - Emission inventories - Regional economic development - Temporal and spatial distribution - Temporal distribution - Urban sewage treatment - Urban wastewater treatment plants - Wastewater treatment plants
Classification code:403.2  Regional Planning and Development - 445.1  Water Treatment Techniques - 451.1  Air Pollution Sources - 452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 512.1  Petroleum Deposits - 522  Gas Fuels - 525.1  Energy Resources and Renewable Energy Issues - 804.2  Inorganic Compounds - 921  Mathematics - 971  Social Sciences
Numerical data indexing:Percentage 2.18e+02%, Percentage 2.29e+02%, Percentage 5.20e+02%
DOI:10.13227/j.hjkx.201706079

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 118>

Accession number:20183905856835
Title:Occurrence and Spatial Distribution of Volatile Organic Compounds in Urban Drinking Water Distribution Systems
Authors:Xu, Mei-Jia (1, 2); Wang, Hai-Liang (1); Li, Chun-Mei (1); Xu, Xiong (1); Wang, Dong-Hong (1) 
Author affiliation:(1) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) Sino-Danish College, University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wang, Dong-Hong(dhwang@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:655-662
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Volatile organic compounds (VOCs) in the urban drinking water distribution systems for two coastal cities (S City and L City) in China were analyzed. Health risk assessments of VOCs detected in tap water were performed, and the distribution characteristics of VOCs in the tap water pipe network were also investigated. Among 47 target VOCs, 16 compounds were detected, of which 11 were detected in both S City and L City. Halogenated hydrocarbons were the most commonly detected VOCs, with trihalomethanes (including bromodichloromethane, dibromochloromethane, and bromoform) having the highest detection frequencies (92%-100%). With the exception of bromodichloromethane and dibromochloromethane, the maximum concentrations of detected VOCs in both cities complied with the relevant limits regulated by the standards for drinking water quality (GB 5749-2006). For bromodichloromethane and dibromochloromethane, not only did their concentrations exceed the standard limits of GB 5749-2006 (60 &mu;g&bull;L<sup>-1</sup> for bromodichloromethane and 100 &mu;g&bull;L<sup>-1</sup> for dibromochloromethane), but their lifetime cancer risks (LCR) were estimated at unacceptable levels (&gt;10<sup>-4</sup>). Therefore, these two compounds should be given sufficient attention or be classified as priority control pollutants in municipal water supply networks. In addition, the spatial distribution of eight VOCs with high detection frequencies (&gt;90%) in the tap water pipe network of S City was investigated. The concentrations of VOCs (excluding toluene) in this urban drinking water distribution system gradually decreased with increasing distance from the drinking water treatment plant.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Spatial distribution
Controlled terms:Gas chromatography - Health risks - Municipal engineering - Potable water - Risk assessment - Risk perception - Volatile organic compounds - Water pipelines - Water piping systems - Water pollution  - Water quality - Water supply - Water treatment
Uncontrolled terms:Coastal cities - Detection frequency - Distribution characteristics - Halogenated hydrocarbons - Maximum concentrations - Municipal water supplies - Priority control - Tap water
Classification code:403.1  Urban Planning and Development - 444  Water Resources - 445.1  Water Treatment Techniques - 445.2  Water Analysis - 446.1  Water Supply Systems - 453  Water Pollution - 461.7  Health Care - 802.3  Chemical Operations - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention - 921  Mathematics
Numerical data indexing:Mass_Density 1.00e-04kg/m3 to 2.20e-02kg/m3, Mass_Density 6.00e-05kg/m3 to 2.20e-02kg/m3, Percentage 9.20e+01% to 1.00e+02%
DOI:10.13227/j.hjkx.201703155

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 119>

Accession number:20183905856738
Title:Day-Night Differences and Source Apportionment of Inorganic Components of PM<inf>2.5</inf> During Summer-Winter in Changzhou City
Authors:Liu, Jia-Shu (1); Gu, Yuan (1); Ma, Shuai-Shuai (1); Su, Ya-Lan (1); Ye, Zhao-Lian (1, 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 &amp; 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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:980-989
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the day-night variation characteristics of inorganic components in atmospheric aerosol, PM<inf>2.5</inf> samples were continuously collected for one month in Changzhou during summer and winter. Eleven water-soluble ions (WSIIs) and 13 metal elements were compared in terms of their day-night character and sources. The results indicated that the day time average PM<inf>2.5</inf> mass concentration was higher than the night time, while the percentage of the total WSIIs in PM<inf>2.5</inf> during the night was higher. The total WSIIs fractions in PM<inf>2.5</inf> were higher in winter (44%-45%) compared to summer (31%-36%), with an opposite seasonal character for metal elements (winter day 3.03%, winter night 2.29%, summer day 4.40%, summer night 4.51%). SO<inf>4</inf><sup>2-</sup>, NO<inf>3</inf><sup>-</sup>, and NH<inf>4</inf><sup>+</sup>, were the three main secondary ions, comprising 77%-85% of the total WSIIs, suggesting that air pollution in Changzhou exhibits complex pollution characteristics dominated by secondary processes. The day time SO<inf>4</inf><sup>2-</sup>/WSIIs ratio (49.0%) was slightly higher than that of the night (41.1%) due to the photochemical reaction under stronger solar radiation, while the lower NO<inf>3</inf><sup>-</sup>(1.98 &mu;g&bull;m<sup>-3</sup>) in the day compared to the night (5.10 &mu;g&bull;m<sup>-3</sup>) was attributed to the decomposition of NH<inf>4</inf>NO<inf>3</inf> during summer days. A good linear correlation among NH<inf>4</inf><sup>+</sup>, SO<inf>4</inf><sup>2-</sup> and NO<inf>3</inf><sup>-</sup>, accompanied by a ratio of predicted NH<inf>4</inf><sup>+</sup> to measured NH<inf>4</inf><sup>+</sup> near 1, illustrated that NH<inf>4</inf><sup>+</sup> ions mainly existed in the form of (NH<inf>4</inf>)<inf>2</inf>SO<inf>4</inf>, NH<inf>4</inf>NO<inf>3</inf>, and NH<inf>4</inf>Cl. It was concluded from the ion balance that PM<inf>2.5</inf> was weakly alkaline in summer but neutral in winter. Fe, Al, and Zn were the largest contributors to the total metal elements, with higher concentrations of Fe and Al and lower levels of Zn in the day time. A correlation coefficient analysis and principle component analysis revealed that inorganic components come from sources that include secondary aerosol formation, suspended dust, and vehicle emissions, but there is some seasonal variation and day-night differences.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Principal component analysis
Controlled terms:Air pollution - Atmospheric aerosols - Ions - Nitrogen compounds - Photochemical reactions - Zinc
Uncontrolled terms:Changzhou - Day-night variation - Inorganic components - PM2.5 - Seasonal variation
Classification code:443.1  Atmospheric Properties - 451  Air Pollution - 546.3  Zinc and Alloys - 741.1  Light/Optics - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 3.10e+01% to 3.60e+01%, Percentage 4.11e+01%, Percentage 4.40e+00%, Percentage 4.40e+01% to 4.50e+01%, Percentage 4.51e+00%, Percentage 4.90e+01%, Percentage 7.70e+01% to 8.50e+01%, Percentage 2.29e+00%, Percentage 3.03e+00%
DOI:10.13227/j.hjkx.201707141

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 120>

Accession number:20183905856848
Title:Effect of the Rainfall on Extinction of Cyanobacteria Bloom and Its Mechanism Analysis
Authors:Liu, Xin-Yuan (1); Song, Lin-Xu (1); Ji, Dao-Bin (1); Liu, De-Fu (2); Cui, Yu-Jie (1); Huang, Jia-Wei (1); Zhao, Chong (1); Tang, Yong-Chun (1); Ping, Ming-Ming (1) 
Author affiliation:(1) College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang; 443002, China; (2) Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, Hubei University of Technology, Wuhan; 430068, China 
Corresponding author:Song, Lin-Xu(280825327@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:774-782
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:There were three rainfall events with different intensity in the Xiangxi Bay (XXB) from May 24 to June 2 in 2016. The factors such as hydrodynamics, water temperature, optical properties, and chlorophyll a concentrations during the rainfall events were analyzed. During the May 27 moderate rain period, the upstream flow of the reservoir bay increased by 1.9 times and the average mixing layer depth in the whole reservoir increased 8.2 m, compared to those before the rainfall event. During the June 1 light rain period, the average mixing layer depth in the whole reservoir increased 1.6 m and the average chlorophyll concentration reduced 2.02 &mu;g&bull;L<sup>-1</sup>, compared with those before the rainfall event. During the June 2 heavy rain period, the upstream flow of the reservoir bay increased by 4 times, the average mixing layer depth in the whole reservoir increased 7.9 m and the average chlorophyll concentration reduced 14.64 &mu;g&bull;L<sup>-1</sup>, compared with those before the rainfall event. The algae moved from the upstream to the downstream with water that reduced the concentration of algae in the XXB. The water temperature stratification weakened during the rain event and the average mixing layer depth in the whole reservoir increased, destroying the algal growth environment. After the rainfall, under suitable light and temperature conditions for 2-3 d, the water temperature stratification of the reservoir was recovered and rapid growth and reproduction of algae occurred. As a result, the chlorophyll concentrations in the reservoir increased. Rainfall has a periodic inhibitory effect on the outbreak of algal blooms; however, it cannot fundamentally solve the problem of tribal bay blooms.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:45
Main heading:Rain
Controlled terms:Algae - Chlorophyll - Mixing - Optical properties - Reservoirs (water) - Rivers - Temperature
Uncontrolled terms:Bloom - Chlorophyll concentration - Chlorophyll-a concentration - Cyanobacteria - Cyanobacteria blooms - Temperature conditions - Three gorges reservoir - Xiangxi bays
Classification code:441.2  Reservoirs - 443.3  Precipitation - 641.1  Thermodynamics - 741.1  Light/Optics - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 1.46e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 2.02e-06kg/m3 to 2.20e-02kg/m3, Size 1.60e+00m, Size 7.90e+00m, Size 8.20e+00m
DOI:10.13227/j.hjkx.201708203

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 121>

Accession number:20183905856853
Title:Adsorption of Methylene Blue and Cu(Ⅱ) by Activated Carbon/Macromolecule Composite Hydrogel
Authors:Kong, Yan (1, 2); Zhuang, Yuan (1); Shi, Bao-You (1, 3); Han, Zhi-Yong (2); Hao, Hao-Tian (1, 4); Han, Kun (1, 2); Yu, Jian-Wei (1, 3) 
Author affiliation:(1) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) College of Environmental Science and Engineering, Beijing Forestry University, Beijing; 100083, China 
Corresponding author:Zhuang, Yuan(yuanzhuang@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:819-827
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Activated carbon/alginate/poly(vinyl alcohol) composite macromolecule hydrogels (CAP) were prepared as adsorbents to study their adsorption performance for methylene blue (MB) and Cu<sup>2+</sup> in aqueous solution. The effect of dosage, pH, temperature, contact time, and initial concentrations of MB and Cu<sup>2+</sup> on the adsorption process was investigated. SEM, FTIR, and BET analyses were conducted to identify the physicochemical properties of CAP. The results indicated that activated carbon was successfully loaded into the interconnected 3D porous network and CAP had rich -COOH and -OH groups. The surface area of the composite hydrogel was 112.7 m<sup>2</sup>&bull;g<sup>-1</sup>. With the dosage and temperature increase, the adsorbed amount of MB and Cu<sup>2+</sup> on CAP decreased, while with the increase in pH, the adsorbed amount increased. The adsorption isotherm was fitted to the Langmuir equation and the maximum monolayer adsorption capacities of MB and Cu<sup>2+</sup> on CAP were 1 940.75 and 190.48 mg&bull;g<sup>-1</sup>, respectively. The adsorption was a fast process and 90% of the maximum adsorption capacity could be reached in 5 h. The kinetic data were fitted to the pseudo-second-order kinetic model reasonably well. CAP had excellent adsorption properties after five times of regeneration.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Adsorption
Controlled terms:Activated carbon - Aromatic compounds - Dyes - Hydrogels - Macromolecules - Solutions
Uncontrolled terms:Adsorption capacities - Adsorption performance - Adsorption properties - Initial concentration - Methylene Blue - Monolayer adsorption - Physicochemical property - Pseudo-second-order kinetic models
Classification code:802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 815.1  Polymeric Materials
Numerical data indexing:Percentage 9.00e+01%, Specific_Surface_Area 1.13e+05m2/kg, Time 1.80e+04s
DOI:10.13227/j.hjkx.201707041

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 122>

Accession number:20183905856507
Title:Residue Levels and Health Risk Assessment of Organochlorine Pesticides in Rice from Shanghai
Authors:Meng, Yuan (1); Liu, Cui-Cui (1); Qiu, Yan-Ling (1); Zhou, Yi-Hui (1); Zhu, Zhi-Liang (1) 
Author affiliation:(1) Key Laboratory of Yangtze River Water Environment (Ministry of Education), College of Environment Science and Engineering, Tongji University, Shanghai; 200092, China 
Corresponding author:Qiu, Yan-Ling(ylqiu@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:927-934
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:As one of the main producers and consumers of pesticides in the world, China has historically used large quantities of organochlorine pesticides, such as DDT and HCH. Rice is a staple food crop in Shanghai, where the Qingpu and Chongming districts are two important rice planting areas. This study detected the residue levels of 24 organochlorine pesticides (OCPs) in rice samples collected from Qingpu and Chongming in Shanghai. The composition and health risk of OCPs in rice samples were investigated. The results revealed that DDTs and HCHs were the main OCPs in rice from the study area. The mean levels of 24 OCPs residues in rice from Qingpu and Chongming were 6.53 ng&bull;g<sup>-1</sup> and 4.70 ng&bull;g<sup>-1</sup>, respectively. The analyses of all the target compounds met the China National Food Safety Standard. The concentrations of 4,4-DDE and &beta;-HCH were the highest in rice from Qingpu, while 2,4-DDT and &beta;-HCH were the main components in rice from Chongming. Source analysis showed that dicofol and lindane might be still used recently in some areas of Shanghai. The health risk assessment results indicated that there was no obvious risk to human health by eating rice from Shanghai based on the OCPs studied.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Risk assessment
Controlled terms:Crops - Food safety - Health - Health risks - Pesticides
Uncontrolled terms:Organochlorine pesticides - Planting areas - Residue level - Rice - Risk to human health - Shanghai - Source analysis - Target compound
Classification code:461.6  Medicine and Pharmacology - 461.7  Health Care - 803  Chemical Agents and Basic Industrial Chemicals - 821.4  Agricultural Products - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201706080

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 123>

Accession number:20183905856754
Title:Spatial Distributions of Transferable Nitrogen Forms and Influencing Factors in Sediments from Inflow Rivers in Different Lake Basins
Authors:Zhou, Rui (1, 2); Yuan, Xu-Yin (1, 2); Bawk, Marip Ja (1); Yu, Hui-Hui (1); Zhang, Qi (1); Tang, Dou-Dou (1) 
Author affiliation:(1) College of Environment, Hohai University, Nanjing; 210098, China; (2) Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Nanjing; 210098, China 
Corresponding author:Yuan, Xu-Yin(yxy_hjy@hhu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1122-1128
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:It is necessary to investigate the distribution of nitrogen forms in river sediments to recognize the water environment quality. In this study, ion exchangeable form nitrogen(IEF-N), weak acid extractable form nitrogen (WAEF-N), strong alkali extractable form nitrogen (SAEF-N) and strong oxidation extractable form nitrogen (SOEF-N) in sediments were obtained by means of sequential extraction procedures.We analyzed the spatial variations of nitrogen forms in sediments from Taihu watershed (Dongtiaoxi River and Xitiaoxi River) and Hongzehu watershed (Anhe River and Suihe River), and expounded the influence factors of nitrogen form distribution. The results showed that the physicochemical properties of sediments from different watersheds varied in space. The concentrations of total nitrogen and nitrogen fractions also showed obvious changes in river sediments. As a whole, the concentrations of total nitrogen and transferable nitrogen in Taihu rivers were higher than those in Hongzehu rivers, but the former showed smaller spatial changes. Sediments from Taihu rivers showed the different concentration order of total nitrogen and transferable nitrogen comparing with those from Hongzehu rivers. The former followed the order of SOEF-N &gt;SAEF-N &gt;IEF-N &gt;WAEF-N, and the latter followed the order of SOEF-N &gt;SAEF-N &gt;WAEF-N &gt;IEF-N.The spatial varitions of transferable nitrogen fractions in Hongzehu rivers were prominent, which was associated with nitrogen sources. The spatial distributions of transferable nitrogen in sediments were obviously affected by their physicochemical properties, especially for organic matter and grain size.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Spatial distribution
Controlled terms:Nitrogen - Rivers - Sediments - Watersheds
Uncontrolled terms:Inflow rivers - Influencing factor - Nitrogen fraction - Nitrogen sources - Physicochemical property - Sequential extraction - Spatial variations - Water environments
Classification code:444.1  Surface Water - 483  Soil Mechanics and Foundations - 804  Chemical Products Generally - 921  Mathematics
DOI:10.13227/j.hjkx.201706234

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 124>

Accession number:20183905856755
Title:Effects of Hydrological and Meteorological Conditions on Diatom Proliferation in Reservoirs
Authors:Sun, Xiang (1, 2); Zhu, Guang-Wei (1); Da, Wen-Yi (3); Yu, Mao-Lei (3); Yang, Wen-Bin (2); Zhu, Meng-Yuan (1); Xu, Hai (1); Guo, Chao-Xuan (1); Yu, Li (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) College of Environmental Science and Engineering, China West Normal University, Nanchong; 637009, China 
Corresponding author:Zhu, Guang-Wei(gwzhu@niglas.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1129-1140
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The proliferation of diatoms is an ecological disaster that harms the water quality of many reservoirs in China. In order to reveal the driving factors of abnormal algal blooms in reservoirs, phytoplankton community structure and the associated environmental factors from 2009 to 2016 from Shahe Reservoir in Tianmuhu were analyzed. Results showed that diatoms and there dominant genus were predominately driven by temperature, and the relationship between hydrology and nutrition was insignificant. Distinct relationships were recorded between different diatom genera and temperature over the past eight years. The optimum growth temperature of diatoms and Synedra were both 27&#8451;, while that for Cyclotella and Achnanthes were both 19&#8451;. Low temperature was suitable for the growth of Melosira, and its growth was compromised with increasing temperature. In a multivariable statistical analysis of the dominant diatom genus and the associated environmental factors, we found that the dominant diatom genus responded differently to the associated environmental factors. The total biomass of the diatom and the biomass of Synedra and Achnanthes were significantly and positively correlated with rainfall (P&lt;0.05). The biomass of Cyclotella was significantly and positively correlated with total phosphorus, rainfall, and water level (P&lt;0.05) and significantly and negatively correlated with water exchange rate (P&lt;0.05). The biomass of Melosira was significantly and positively correlated with total phosphorus. The annual peak biomass of diatoms can be predicted by a multiple regression model with independent variables, including rainfall intensity, dissolved total phosphorus, and the accumulated temperature in winter and spring. Our results indicated that the proliferation of diatoms responds significantly to hydrological and meteorological factors while insignificantly to nitrogen and phosphorus loading. External load reduction is needed to maintain a good water quality in the reservoir. In addition, extreme weather conditions should be given attention to provide an early warning for diatom proliferation.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Ecology
Controlled terms:Biomass - Phosphorus - Phytoplankton - Rain - Regression analysis - Reservoirs (water) - Temperature - Water levels - Water quality
Uncontrolled terms:Accumulated temperatures - Diatom - Extreme weather conditions - Extreme weather events - Multi-variable statistical analysis - Multiple regression model - Optimum growth temperature - Proliferation
Classification code:441.2  Reservoirs - 443.3  Precipitation - 445.2  Water Analysis - 454.3  Ecology and Ecosystems - 471  Marine Science and Oceanography - 641.1  Thermodynamics - 804  Chemical Products Generally - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201707267

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 125>

Accession number:20183905856778
Title:Characterization Composition of Soluble Microbial Products in an Aerobic Granular Sludge System
Authors:Yang, Dan (1); Liu, Dong-Fang (1); Du, Li-Qiong (1); Huang, Wen-Li (1) 
Author affiliation:(1) College of Environmental Science and Engineering, Nankai University, Tianjin; 300350, China 
Corresponding author:Huang, Wen-Li(huangwenli@nankai.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1325-1332
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Using flocculent activated sludge as seed sludge to cultivate aerobic granular sludge in a SBR, the main objective of this study was focused on the accumulation, relative molecular mass distribution, and composition of soluble microbial products (SMP) in an aerobic granular sludge (AGS) system. SMP were predominant (71-85 mg&bull;L<sup>-1</sup>) in the effluent of the AGS system. The formation of SMP was related to substrate utilization, biomass decay, and EPS hydrolysis. A relative molecular mass distribution analysis indicated that the majority of SMP, accounting for about 54.8%-71.7%, had M<inf>r</inf>&lt;3&times;10<sup>3</sup>; whereas, the M<inf>r</inf>&gt;100&times;10<sup>3</sup> formed a small fraction, constituting only 9.3%-14.5%. Three-dimensional excitation emission matrix fluorescence spectra (3D-EEM) identified four peaks in SMP, belonging to aromatic protein-like, tryptophan protein-like, humic acid-like, and fulvic acid-like substances. Gas chromatography-mass spectrometry (GC-MS) analysis revealed that esters (39.0%), short chain alkanes (14.9%), alkenes (11.7%), and alcohols (7.6%) were the main compounds in SMP. Most notably, bis(2-ethylhexyl) phthalate, as one kind of ester, accounted for 32% of the identified SMP.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Gas chromatography
Controlled terms:Amino acids - Effluents - Esters - Granular materials - Mass spectrometry - Molecular mass - Proteins - Seed
Uncontrolled terms:Aerobic granular sludges - Gas chromatography-mass spectrometry - Phthalates - Relative molecular mass - Soluble microbial products
Classification code:452.3  Industrial Wastes - 801  Chemistry - 802.3  Chemical Operations - 804.1  Organic Compounds - 821.4  Agricultural Products - 951  Materials Science
Numerical data indexing:Mass_Density 7.10e-02kg/m3 to 8.50e-02kg/m3, Percentage 1.17e+01%, Percentage 1.49e+01%, Percentage 3.20e+01%, Percentage 3.90e+01%, Percentage 5.48e+01% to 7.17e+01%, Percentage 7.60e+00%, Percentage 9.30e+00% to 1.45e+01%
DOI:10.13227/j.hjkx.201707046

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 126>

Accession number:20183905856770
Title:Start-up and Operation of Biofilter Coupled Nitrification and CANON for the Removal of Iron, Manganese and Ammonia Nitrogen
Authors:Li, Dong (1); Cao, Rui-Hua (1); Yang, Hang (2); Wang, Yan-Ju (1); L&uuml;, Sai-Sai (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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1264-1271
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A pilot-scale bio-filter coupled nitrification and CANON was started up to remove iron, manganese and ammonia nitrogen from groundwater in a plant, and the main removal route of ammonia nitrogen was analyzed. The experiment showed that the bio-filter could be started up successfully and achieved stable operation after 164 days of culture development. The value of &Delta;NH<inf>4</inf><sup>+</sup>-N/&Delta;NO<inf>3</inf><sup>-</sup>-N was 1.49, and the oxidation and removal of Fe(&#8545;), Mn(&#8545;), and NH<inf>4</inf><sup>+</sup>-N were (9.87&plusmn;1.17) (2.25&plusmn;0.06), and (1.51&plusmn;0.06) mg&bull;L<sup>-1</sup>, respectively. The calculation based on the quantitative relationship between nitrogen conservation and dissolved oxygen (DO) measurement indicated that the contribution of CANON to NH<inf>4</inf><sup>+</sup>-N removal was 33.48%-38.87%, and the average ratio of ammonia nitrogen removal amount to DO was 1:3.79-1:3.94. The removal ratio of ammonia nitrogen was lower with lower temperature.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Chemicals removal (water treatment)
Controlled terms:Ammonia - Dissolved oxygen - Groundwater - Iron - Nitrification - Nitrogen removal
Uncontrolled terms:Ammonia nitrogen - Ammonia nitrogen removal - CANON - Lower temperatures - N removal - Pilot scale - Removal ratios - Stable operation
Classification code:444.2  Groundwater - 545.1  Iron - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 4.49e-01yr, Percentage 3.35e+01% to 3.89e+01%
DOI:10.13227/j.hjkx.201708020

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 127>

Accession number:20183905856814
Title:VOCs Emission from Motor Vehicles in China and Its Impact on the Atmospheric Environment
Authors:Chen, Tian-Zeng (1, 2); Ge, Yan-Li (1, 2); Liu, Yong-Chun (1, 2, 3); He, Hong (1, 2, 3) 
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) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China 
Corresponding author:Liu, Yong-Chun(ycliu@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:478-492
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Volatile organic compounds (VOCs) are important precursors of O<inf>3</inf> and secondary organic aerosols (SOAs). In order to fully understand the impacts of VOCs from motor vehicles on urban air quality, the current state-of-the-art research results on source apportionment are systematically introduced. The contribution of VOCs from motor vehicles to secondary pollutants in China is further discussed. It was found that motor vehicle exhaust is the largest source of urban atmospheric VOCs, and the average contribution ratio is up to 36.8%, wherein motorcycles and light gasoline vehicles are the main emission sources. The results showed that VOCs from vehicles play an important role in O<inf>3</inf> and SOA formation in urban areas, whereas with the improvement of emission standards and operating conditions, the motor vehicle emission factors and ozone formation potentials (OFPs) are obviously reduced. Moreover, the composition profile of the exhaust is mainly composed of aromatic hydrocarbons and alkenes, which contribute more to secondary pollution. This work can aid in providing data and theoretical support for the control of VOCs from motor vehicles in the future.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:138
Main heading:Vehicles
Controlled terms:Air quality - Aromatic hydrocarbons - Volatile organic compounds
Uncontrolled terms:Atmospheric environment - Emission characteristics - Motor vehicle - Motor vehicle emissions - Ozone formation potentials - Secondary organic aerosols - Secondary pollutants - Source apportionment
Classification code:451.2  Air Pollution Control - 804.1  Organic Compounds
Numerical data indexing:Percentage 3.68e+01%
DOI:10.13227/j.hjkx.201705129

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 128>

Accession number:20183905856741
Title:Ecological and Health Risks of Trace Heavy Metals in Atmospheric PM<inf>2.5</inf> Collected in Wuxiang Town, Shanxi Province
Authors:Guo, Zhao-Xia (1, 2); Geng, Hong (1); Zhang, Jin-Hong (3); Zhou, Huan (1); Peng, Yan (2); Zhai, Shuai-Ying (2); Li, Jin-Lei (2); Chen, Yu-Shan (2) 
Author affiliation:(1) Institute of Environmental Science, Shanxi University, Taiyuan; 030006, China; (2) College of Environmental &amp; Resource Sciences, Shanxi University, Taiyuan; 030006, China; (3) Environmental Protection Agency of Wuxiang County, Wuxiang; Shanxi Province; 046300, China 
Corresponding author:Geng, Hong(genghong@sxu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1004-1013
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The pollution of atmospheric PM<inf>2.5</inf> and ambient air quality were investigated in Wuxiang Town, Shanxi Province, China, and the ecological and health risks of the trace heavy metals in PM<inf>2.5</inf>were analyzed. The PM<inf>2.5</inf> samples were collected every day using a medium-volume PM<inf>2.5</inf> sampler in autumn (from Oct. 22 to Nov. 19, 2014) and in winter (from Jan. 12 to Feb. 13, 2015) on the roof of a building at the Wuxiang Environmental Protection Agency (EPA). The mass concentrations of PM<inf>2.5</inf> were determined gravimetrically, and the contents of seven trace heavy metals (i. e., As, Cd, Cr, Cu, Ni, Pb, and Zn) in PM<inf>2.5</inf> were obtained using Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES). The pollution extent, sources, and potential ecological and health risks of the trace heavy metals in PM<inf>2.5</inf> were identified and assessed using the geo-accumulation index, ecological risk index, a correlation and principle component analysis, and the exposure risk models of US EPA. Results showed that the average concentration of PM<inf>2.5</inf> in winter, approximately three times higher than that in autumn, exceeded the national secondary standard of ambient air quality (GB 3095-2012) on 65% of the sampling days. The heavy metals in PM<inf>2.5</inf> mainly originated from anthropogenic activities, with contributions of 58.38% and 18.73% from coal combustion and vehicular emission, respectively. In general, the levels of the heavy metals in PM<inf>2.5</inf> followed the order of Cu&gt;Zn&gt;Pb&gt;Cr&gt;As&gt;Ni&gt;Cd, with higher ecological risks from Cd and Cu and higher non-carcinogenic and carcinogenic risks from Cr compared with other metals. It is suggested that greater coal combustion in winter under the adverse geographical conditions for air diffusion in Wuxiang Town were responsible for the increased atmospheric PM<inf>2.5</inf> concentration and their ecological and health risks in heavy metals.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Health risks
Controlled terms:Air pollution control - Air quality - Atomic emission spectroscopy - Coal combustion - Environmental Protection Agency - Health - Heavy metals - Inductively coupled plasma - Principal component analysis - Risk assessment  - Trace elements
Uncontrolled terms:Anthropogenic activity - Ecological risks - Geographical conditions - Inductively coupled plasma-atomic emission spectrometry - National secondary standard - Principle component analysis - Trace heavy metals - Wuxiang Town
Classification code:451.2  Air Pollution Control - 454.2  Environmental Impact and Protection - 461.6  Medicine and Pharmacology - 461.7  Health Care - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 531  Metallurgy and Metallography - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics - 932.3  Plasma Physics
Numerical data indexing:Percentage 1.87e+01%, Percentage 5.84e+01%, Percentage 6.50e+01%
DOI:10.13227/j.hjkx.201706011

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 129>

Accession number:20183905856771
Title:Analysis of CANON Process Start-up with Fiber Carrier
Authors:Gu, Cheng-Wei (1, 2); Chen, Fang-Min (1, 2); Li, Xiang (1, 2); Huang, Yong (1, 2); You, Xing-Yi (1, 2); Jin, Run (1, 2); Zhang, Weng-Jing (1, 2); Dong, Shi-Yu (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:Li, Xiang(lixiang@mail.usts.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1272-1277
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A CANON reactor with fiber carrier was started up by seeding nitrification sludge and ANAMMOX sludge to study the operating characteristics of a fiber carrier. The results showed that total nitrogen removal load rose from 0.09 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> to 0.9 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> and remained steady in the 85th day. This indicated that fiber carrier is beneficial to the accumulation of sludge, and the reactor can maintain a higher biomass. The DO in the reactor reached 5 mg&bull;L<sup>-1</sup> with the enrichment of microorganisms, biofilm thickening, and the improvement of the reactor's ability. The DO gradient of the biofilm from the outside to the inside was 0.32-0 mg&bull;L<sup>-1</sup>, which could be obtained by a microelectrode. It was shown that the permeability of oxygen to the biofilm decreased, and the amount of nitrifying microorganisms decreased with biofilm thickening. The quantitative PCR results showed that the abundance of ANAMMOX was an order of magnitude more than before. The abundance of AOB increased slightly, while the abundance of NOB stayed at a relatively low level.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Fibers
Controlled terms:Biofilms - Microelectrodes - Microorganisms - Nitrification - Nitrogen removal - Polymerase chain reaction - Reactor startup - Wastewater treatment
Uncontrolled terms:ANAMMOX - Nitrosation - Operating characteristics - Quantitative PCR - Total nitrogen removal
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461.9  Biology - 462.5  Biomaterials (including synthetics) - 621  Nuclear Reactors - 801.2  Biochemistry - 802.2  Chemical Reactions
Numerical data indexing:Mass_Density 3.20e-04kg/m3, Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3
DOI:10.13227/j.hjkx.201708092

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 130>

Accession number:20183905856761
Title:Removal of Organic Matter from Water by Chemical Preoxidation Coupled with Biogenic Manganese Oxidation
Authors:Jian, Zhi-Yu (1, 2); Chang, Yang-Yang (2); Wang, Li-Xin (1); Liang, Jin-Song (2); Bai, Yao-Hui (2) 
Author affiliation:(1) School of Ecology and Environment, Inner Mongolia University, Hohhot; 010021, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China 
Corresponding author:Bai, Yao-Hui(yhbai@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1188-1194
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In the process of drinking water treatment, potassium permanganate and iron-manganese oxides are typical pre-oxidation methods that can not only effectively remove organic matters in drinking water, but also reduce the production of disinfection by-products (DBPs). However these two pre-oxidation methods will produce Mn<sup>2+</sup> that is genotoxic. In order to solve this problem, a concept was proposed to connect biogenic-manganese oxidation technology after chemical oxidation. The manganese-oxidizing microbe may convert Mn<sup>2+</sup> into the bio-manganese oxide, which can further remove the pollutants by its strong oxidative and adsorption capacity to improve water purification. In the simulated contaminated water composed of natural organic tyrosine (Tyr) and synthetic organic 2-Hydroxy-4-Methoxybenzophenone-5-Sulfonic Acid (BP-4), we verified the proposed the concept. Pre-oxidation by potassium permanganate or iron-manganese oxides efficiently removed Tyr, but had negligible effect on BP-4. During this, Mn<sup>2+</sup> was generated. In the subsequent biological system, the manganese-oxidizing bacteria Pseudomonas sp. QJX-1 could utilize the Tyr for growth and oxidize Mn<sup>2+</sup> to Mn<sup>4+</sup> oxide. The generated manganese oxides could then effectively remove BP-4. In comparison, the moderate potassium permanganate preoxidation coupled with bio-manganese oxidation had a desirable treatment effect, with 100%, 50%, and 98.9% removals for Tyr, BP-4, and Mn<sup>2+</sup>, respectively. Importantly, the study provides a new method for drinking water treatment.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Chemicals removal (water treatment)
Controlled terms:Amino acids - Bacteria - Biogeochemistry - Iron oxides - Manganese oxide - Manganese removal (water treatment) - Organic compounds - Oxidation - Potable water - Potash  - Water pollution
Uncontrolled terms:Adsorption capacities - Biogenic manganese - BP-4 - Disinfection byproducts - Manganese oxidizing bacteria - Peroxidation - Potassium permanganate - Pseudomonas sp
Classification code:444  Water Resources - 445.1  Water Treatment Techniques - 453  Water Pollution - 481.2  Geochemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.00e+02%, Percentage 5.00e+01%, Percentage 9.89e+01%
DOI:10.13227/j.hjkx.201707103

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 131>

Accession number:20183905856775
Title:Start-Up and Regional Characteristics of a Pilot-scale Integrated PN-ANAMMOX Reactor
Authors:Zhou, Zheng (1, 2); Wang, Fan (1, 2); Lin, Xing (1, 2); Dong, Shi-Yu (1, 2); Zhu, Qiang (1, 2); Li, Xiang (1, 2); Huang, Yong (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:Li, Xiang(lixiang@mail.usts.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1301-1308
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The start-up and regional characteristics of a pilot scale integrated PN-ANAMMOX reactor was studied. The results show that inoculated nitrosation suspension filler in the anaerobic zone, ANAMMOX sludge, and common anaerobic sludge in the anaerobic zone can start the reactor quickly. The PN-ANAMMOX reactor was successfully started at 74 days. The removal rate of total nitrogen increased from 0.02 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> to 0.48 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>. The analysis of the nitrogen conversion characteristics in two regions showed that the AOB had been in a dominant position in the aerobic zone, and the NOB was inhibited by DO and the matrix, NPR<inf>a</inf> increased from 0.22 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> to 0.58 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>, and NAP<inf>a</inf> could reach 95% with the increase in anaerobic denitrification capacity. The anaerobic zone was a critical region of the integrated PN-ANAMMOX reactor, and NRR<inf>ana</inf> increased from 0.02 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> to 4.7 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>. During the start-up period (temperature decreased from 32&#8451; to 27&#8451;), the changes first affected the anaerobic zone, NRR<inf>ana</inf> decreased to 3.7 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> (about 21%), with little effect on the aerobic zone. The two regions can achieve a large ANAMMOX bacteria enrichment, as, during this time, the aerobic zone also has a certain denitrification capacity, while the anaerobic zone featured enhanced denitrification.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Nitrogen removal
Controlled terms:Aerobic bacteria - Denitrification - Nitrogen - Process control - Reactor startup - Wastewater treatment
Uncontrolled terms:Anaerobic sludge - ANAMMOX - Anammox bacteria - Denitrification capacity - Nitrogen conversion - Partial nitrification - Pilot scale - Regional characteristics
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461  Bioengineering and Biology - 621  Nuclear Reactors - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Age 2.03e-01yr, Percentage 2.10e+01%, Percentage 9.50e+01%
DOI:10.13227/j.hjkx.201707191

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 132>

Accession number:20183905856774
Title:Effect of Organic Carbon Source on Start-up and Operation of the CANON Granular Sludge Process
Authors:Li, Dong (1); Wang, Yan-Ju (1); L&uuml;, Yu-Feng (1); Cao, Rui-Hua (1); Li, Shuai (2); 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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1294-1300
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effect of organic carbon on the start-up and operation of the CANON granular sludge process was investigated in two SBR reactors with different strategies: gradually increased organic carbon concentration (R1) and without organic carbon (R2). The results showed that adding 50 mg&bull;L<sup>-1</sup> organic carbon accelerated the start-up of the CANON granular sludge process. R1 and R2 were started up in 23 d and 32 d, respectively. Moreover, the appropriate organic carbon enhanced the activity of AOB, AnAOB, and denitrification, increasing the ammonia removal rates and total nitrogen (TN) removal rates. The maximum ammonia removal rates and total nitrogen removal rates of R1 were 92% and 88%, respectively. The maximum ammonia removal rates and total nitrogen removal rates of R2 were 89% and 80%, respectively. Further tests showed that excessive organic carbon concentration decreased the activity of AOB and AnAOB and reduced the removal efficiency of ammonia and total nitrogen. Adding organic carbon promoted denitrification activity and increased nitrogen removal efficiency.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Organic carbon
Controlled terms:Ammonia - Denitrification - Efficiency - Granular materials - Nitrogen removal
Uncontrolled terms:Ammonia concentrations - Ammonia removal - CANON - Carbon concentrations - Granular sludge - Nitrogen removal efficiency - Removal efficiencies - Total nitrogen removal
Classification code:802.2  Chemical Reactions - 804.1  Organic Compounds - 804.2  Inorganic Compounds - 913.1  Production Engineering - 951  Materials Science
Numerical data indexing:Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 8.00e+01%, Percentage 8.80e+01%, Percentage 8.90e+01%, Percentage 9.20e+01%
DOI:10.13227/j.hjkx.201707133

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 133>

Accession number:20183905856767
Title:Groundwater Arsenic and Silicate Adsorption on TiO<inf>2</inf> and the Regeneration of TiO<inf>2</inf>
Authors:Ma, Wen-Jing (1); Yan, Li (2, 3); Zhang, Jian-Feng (1) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture &amp; Technology, Xi'an; 710055, China; (2) Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Zhang, Jian-Feng(zhangjianfeng@xauat.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1241-1247
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Titanium dioxide (TiO<inf>2</inf>) was widely used to remove arsenic (As) from groundwater due to its excellent properties. Previous studies show that the coexisting silicate ions (Si) could occupy the available surface sites of TiO<inf>2</inf> and further inhibit As adsorption and TiO<inf>2</inf> regeneration. To investigate the effect of Si adsorption on the As molecular surface structure, an extended X-ray absorption fine structure (EXAFS) analysis was conducted in this work. The results indicated that the presence of Si exhibited no impact on the As adsorption configuration on TiO<inf>2</inf>. In situ attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy results demonstrated that the polymerization of Si that formed on the TiO<inf>2</inf> surface compete with As adsorption sites, increasing the difficulty for TiO<inf>2</inf> regeneration. To effectively regenerate TiO<inf>2</inf>, the removal efficiency of Si polymers on TiO<inf>2</inf> via sodium fluoride (NaF) was studied. The results showed that NaF could remove Si monomer and polymer from TiO<inf>2</inf>, and the regenerated TiO<inf>2</inf> could be reused with a stable adsorption performance. In situ ATR-FTIR spectroscopy suggested that NaF desorbed the Si monomer and polymer effectively. When spent TiO<inf>2</inf> was regenerated with NaOH and NaF in three treatment cycles, As and Si desorption rates were 86.8%-100.3% and 67.9%-82.0%, respectively. The present study provides a new insight into regenerating absorbents with coadsorbed As and Si in groundwater.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Silicon
Controlled terms:Adsorption - Chemicals removal (water treatment) - Desorption - Extended X ray absorption fine structure spectroscopy - Fourier transform infrared spectroscopy - Groundwater - Monomers - Oxides - Silicates - Sodium Fluoride  - Sodium hydroxide - Supersaturation - Titanium dioxide - X ray absorption
Uncontrolled terms:ATR FT-IR spectroscopies - Attenuated total reflectance Fourier transform infrared - Extended x-ray absorption fine structure analysis - Molecular levels - Molecular surfaces - Regeneration and reuse - Removal efficiencies - Titanium dioxides (TiO2)
Classification code:444.2  Groundwater - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 711  Electromagnetic Waves - 801  Chemistry - 801.4  Physical Chemistry - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 931.3  Atomic and Molecular Physics
Numerical data indexing:Percentage 6.79e+01% to 8.20e+01%, Percentage 8.68e+01% to 1.00e+02%
DOI:10.13227/j.hjkx.201706112

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 134>

Accession number:20183905856856
Title:Ozonation Characteristics of Low Coagulability Organic Matter from the Secondary Effluent of WWTPs
Authors:Hou, Rui (1); Jin, Xin (1); Jin, Peng-Kang (1); Gou, Bang-Yao (2); Wang, Xiao-Chang (1) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Xi'an Lingbo Environmental Engineering Co., Ltd., Xi'an; 710100, China 
Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:844-851
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The aim of this study was to investigate the effectiveness of ozonation on the removal of organic matter with low coagulability from municipal secondary effluent. The results revealed that the removal efficiency of coagulation generally remained quite low. The residual organic matter belonged to low coagulability organic matter. The presence of the ozone increased the removal efficiency of color and UV<inf>254</inf> gradually for low coagulability organic matter, whereas DOC had no noticeable change; the efficiencies were 45%, 34%, and 20%, respectively, at a dosage (denoted as O<inf>3</inf>/DOC) of 1.5 mg&bull;mg<sup>-1</sup>. It could be concluded that ozone easily reacted with unsaturated organic matter, and the mineralization of organic matter was less effective. In order to further define the variation in organic matter of the secondary effluent, the differences between the relative molecular weight distribution and fluorescence characteristics of coagulation and ozonation with different zone dosages were monitored in this study. The findings showed that coagulation had little effect on organic content. Nonetheless, ozone might have preferentially reacted with high-molecular-weight substances of organic matter with low coagulability and reduced the fluorescence intensity in the humic-like regions significantly. The shift of fluorescence peak was not changed by ozonation. In addition, via X-ray photoelectron spectroscopy (XPS) analysis, it was identified that coagulation could remove carboxylic organic matter. On the other hand, with the increasing ozone dosage (from 0 to 1.5 mg&bull;mg<sup>-1</sup>), ozone could preferentially react with low coagulability organic matter with aromatic structure, thus the amount of aliphatics increased gradually.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Effluents
Controlled terms:Biogeochemistry - Biological materials - Coagulation - Efficiency - Fluorescence - Molecular weight distribution - Organic compounds - Ozone - Ozonization - Photoelectrons  - Photons - X ray photoelectron spectroscopy
Uncontrolled terms:Aromatic structures - Fluorescence characteristics - Fluorescence intensities - High molecular weight - Municipal secondary effluents - Removal efficiencies - Secondary effluent - Three-dimensional fluorescences
Classification code:452.3  Industrial Wastes - 461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 741.1  Light/Optics - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 913.1  Production Engineering - 931.3  Atomic and Molecular Physics
Numerical data indexing:Percentage 2.00e+01%, Percentage 3.40e+01%, Percentage 4.50e+01%
DOI:10.13227/j.hjkx.201706076

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 135>

Accession number:20183905856816
Title:Source Analysis of Volatile Organic Compounds in the Nanjing Industrial Area and Evaluation of Their Contribution to Ozone
Authors:Zhang, Yu-Xin (1); An, Jun-Lin (1); Wang, Jun-Xiu (1); Shi, Yuan-Zhe (1); Liu, Jing-Da (1); Liang, Jing-Shu (1) 
Author affiliation:(1) Key Laboratory of Meteorological Disaster, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China 
Corresponding author:An, Jun-Lin(junlinan@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:502-510
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Ambient volatile organic compounds (VOCs) were continuously measured during the high ozone (O<inf>3</inf>) periods from May 1 to May 31 and June 1 to July 16, 2015 at an industrial area in the north suburb of Nanjing. A positive matrix factorization (PMF) model and an observation-based model (OBM) were combined for the first time to investigate the contributions of VOC sources and species to local photochemical O<inf>3</inf> formation. The average VOC concentrations in 2014 and 2015 were (36.47&plusmn;33.44)&times;10<sup>-9</sup> and (34.69&plusmn;34.08)&times;10<sup>-9</sup>, respectively. The VOC sources identified by the PMF model for 2014 and 2015 belonged to 7 source categories, including vehicular emissions, liquefied petroleum gas usage, biogenic emissions, furniture manufacturing industry, chemical industry, chemical coating industry, and chemical materials industry emission sources. The OBM was modified to assess the O<inf>3</inf> precursors' relationships. Generally, photochemical O<inf>3</inf> production was VOC limited, with positive relative incremental reactivity (RIR) values for VOC species and a negative RIR value for NO. It can be seen that alkenes (1.20-1.79) and aromatics (1.42-1.48) presented higher RIR values and controlling O<inf>3</inf> would be the most effective when the VOC emissions from alkenes were reduced by 80%. Vehicle emissions (1.01-1.11), LPG (0.74-0.82), biogenic emissions (0.34-0.42), and furniture manufacturing industry (0.32-0.49) sources were the top four VOC sources making significant contributions to photochemical O<inf>3</inf> formation, which suggests that controlling vehicle emissions, biogenic emissions, LPG, and furniture manufacturing industry sources should be the most effective strategy to reduce photochemical O<inf>3</inf> formation.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:34
Main heading:Gas emissions
Controlled terms:Chemical industry - Factorization - Furniture manufacture - Gas chromatography - Hydrocarbons - Liquefied petroleum gas - Ozone - Petroleum industry - Volatile organic compounds
Uncontrolled terms:Chemical materials - Controlling vehicles - Furniture manufacturing - Observation-based model - Positive matrix factorization models - Relative incremental reactivity (RIR) - Source apportionment - Vehicular emission
Classification code:523  Liquid Fuels - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 805  Chemical Engineering, General - 921  Mathematics
Numerical data indexing:Percentage 8.00e+01%
DOI:10.13227/j.hjkx.201706216

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 136>

Accession number:20183905856762
Title:Treating Simulated Dye Wastewater by an In Situ Copper Ferrite Process
Authors:Han, Zhi-Yong (1); Han, Kun (1); Hao, Hao-Tian (2, 3); Yu, Jian-Wei (2, 4); Shi, Bao-You (2, 4); Zhuang, Yuan (2); Kong, Yan (1) 
Author affiliation:(1) College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) College of Environmental Science and Engineering, Beijing Forestry University, Beijing; 100083, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Shi, Bao-You(byshi@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1195-1201
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Four types of simulated dye wastewater containing methylene blue, tartrazine, Congo red, and crystal violet were treated by an in situ copper ferrite process, and the influencing factors of the operational parameters in this process were studied. The main mechanism of dye removal was suggested by reaction thermodynamics and solid products characterization for methylene blue removal. The results showed that an in situ copper ferrite process could effectively remove four kinds of simulated dyes by adjusting reaction conditions appropriately. The maximum capacities of the in situ copper ferrite process for methylene blue, crystal violet, tartrazine, and Congo red were 349.2, 382.2, 402.5 and 831.8 mg&bull;g<sup>-1</sup>, respectively, under reaction condition of c(Cu<sup>2+</sup>) of 0.01 mol&bull;L<sup>-1</sup>, c(Fe<sup>2+</sup>) of 0.025 mol&bull;L<sup>-1</sup>, c(OH)/c(M)=1.7 (hydroxyl and metal molar ratio), reaction temperature of 40&#8451;, and reaction time of 60 min. Comprehensive physical interactions, including a sweeping effect, encapsulation, and high active surface adsorption of the in situ Fe-Cu precipitates were the dominant mechanisms in dye removal by the process. Copper ferrite, as an effective magnetic adsorbent and a highly efficient environmental catalyst, was regenerated by magnetic separation, catalytic oxidation, and high temperature calcination.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Ferrite
Controlled terms:Adsorption - Aromatic compounds - Azo dyes - Binary alloys - Catalytic oxidation - Copper - Copper alloys - Dyes - Iron alloys - Magnetic materials  - Magnetic separation - Recycling - Thermodynamics - Wastewater reclamation - Wastewater treatment
Uncontrolled terms:Copper ferrites - Dyes wastewaters - High-temperature calcination - Operational parameters - Physical interactions - Reaction conditions - Reaction temperature - Reaction thermodynamics
Classification code:452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 531.2  Metallography - 544.1  Copper - 544.2  Copper Alloys - 545.2  Iron Alloys - 641.1  Thermodynamics - 708.4  Magnetic Materials - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds
Numerical data indexing:Molar_Concentration 1.00e+01mol/m3 to 2.20e-02mol/m3, Molar_Concentration 2.50e+01mol/m3 to 2.20e-02mol/m3, Time 3.60e+03s
DOI:10.13227/j.hjkx.201706099

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 137>

Accession number:20183905856844
Title:Temporal-spatial Distribution and Pollution Assessment of Dissolved Heavy Metals in Chaohu Lake
Authors:Wu, Lei (1, 2); Liu, Gui-Jian (1); Zhou, Chun-Cai (1); Liu, Rong-Qiong (1) 
Author affiliation:(1) School of Earth and Space Sciences, University of Science and Technology of China, Hefei; 230026, China; (2) Anhui Academy of Environmental Science and Research, Hefei; 230022, China 
Corresponding author:Liu, Gui-Jian(lgj@ustc.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:738-747
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Surface water samples were collected in different seasons from Chaohu Lake to determine the concentrations and potential environmental impacts of nine dissolved heavy metals (As, Hg, Cd, Cu, Pb, Zn, Cr, Ni, and Co). The concentrations of the selected heavy metals were determined by inductively coupled plasma-optical emission spectrometry (ICP-OES, ICAP6000 series). The single pollution index method and integrated pollution index method were used to evaluate the potential environmental impacts. The results indicated that the contents of dissolved As, Cd, Pb, and Cr in Chaohu Lake were lower than the limitations of Grade&#8544;of the Environmental Quality Standards for Surface Water (GB 3838-2002), while Cu and Zn were within the limitations of Grade&#8544;-&#8545; and Hg was within the limitations of Grade&#8544;- &#8546;. The contents of Ni and Co were far below the limitations. The concentrations of the selected heavy metals (Cu, Pb, Zn, Cr, Ni, and Co) varied among seasons and areas. Elevated concentrations of Cu, Zn, and Ni were found in summer, while elevated contents of Pb, Cr, and Co were found in autumn, autumn, and spring, respectively. Trace elements in the western part of Chaohu Lake (especially in the northwestern part) were higher than those in the middle and eastern parts for autumn, winter, and summer. Significant positive correlations were found among Cu, Pb, Zn, Cr, and Ni in the surface water, suggesting that these elements may derive from similar sources. The values of both the single factor pollution index and integrated pollution index of the selected elements in the surface water were far less than 1, suggesting that the environmental impacts could be regarded as negligible. The integrated pollution indices in the western part of the lake were higher than those of the middle and eastern parts on a one-year timescale, and the integrated pollution indices in each lake area followed a pattern of wet season (summer)&gt;normal season (spring and autumn)&gt;dry season (winter).<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Lake pollution
Controlled terms:Dissolution - Heavy metals - Inductively coupled plasma - Lakes - Optical emission spectroscopy - River pollution - Spatial distribution - Spectrometry - Trace elements
Uncontrolled terms:Chaohu lakes - Dissolved heavy meals - Elevated concentrations - Environmental quality standards - Inductively coupled plasma-optical emission spectrometry - Integrated pollution indices - Pollution assessment - Temporal spatial distribution
Classification code:453  Water Pollution - 531  Metallurgy and Metallography - 802.3  Chemical Operations - 921  Mathematics - 932.3  Plasma Physics - 941.4  Optical Variables Measurements
DOI:10.13227/j.hjkx.201703099

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 138>

Accession number:20183905856824
Title:Pollution Characteristics and Health Risk Assessment of VOCs Fugitively Emitted from Typical Brewers
Authors:Gao, Zhan-Qi (1); Hu, Guan-Jiu (1); Wang, Hui (1); Zhu, Bing-Qing (1); Chen, Shu-Lan (1) 
Author affiliation:(1) State Environmental Protection Key Laboratory of Monitoring and Analysis for Organic Pollutants in Surface Water, Environment Monitoring Center of Jiangsu Province, Nanjing; 210036, China 
Corresponding author:Hu, Guan-Jiu(hgj@jshb.gov.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:567-575
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Food processing plants are an important industrial source of volatile organic compounds (VOCs). Research on the unorganized emissions of VOCs to the surrounding environment from food processing plants is still quite scarce. The purpose of this study was to investigate the concentration characteristics, odor pollution, and health risk of the VOCs fugitively emitted from the brewing industry. The concentration characteristics of VOCs fugitively emitted from a typical vinegar factory and a typical distillery were detected via portable gas chromatography-mass spectrometry. The thresholds of the diluted multiple and sensory methods were also used for analyzing the VOCs. In addition, the assessment of health risk was conducted according to the US EPA evaluation model. The results show that the concentrations of the total VOCs emitted from the vinegar factory and the distillery were 0.968 mg&bull;m<sup>-3</sup> and 0.293 mg&bull;m<sup>-3</sup>, respectively. Ethyl acetate and acetic acid were the main VOCs in the atmosphere of the vinegar plant, accounting for 76.3% and 13.5% of the total VOCs, respectively. The VOCs of the distillery were mainly characterized by ethanol and ethyl acetate, which accounted for 56.3% and 30.4% of the total VOCs, respectively. Oxygen-containing VOCs were the most important component of the studied brewing industry source. The total odor indices of the VOCs emitted from the vinegar factory and the distillery were both higher than 1, which indicates that their unorganized emission of VOCs have odor pollution to the atmosphere. The odor concentrations of the vinegar factory and the distillery were also higher than the standard limit of malodorous pollutants. The results of the health risk assessment show that the carcinogenic risk indices of VOCs were 2.45&times;10<sup>-6</sup> and 5.25&times;10<sup>-6</sup>, respectively, which exceeded the suggested risk value by the EPA but were lower than the OSHA and ICRP values.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:40
Main heading:Risk assessment
Controlled terms:Acetic acid - Distilleries - Fermentation - Food processing - Gas chromatography - Health - Health risks - Industrial plants - Mass spectrometry - Pollution  - Processed foods - Volatile organic compounds
Uncontrolled terms:Carcinogenic risk - Evaluation modeling - Food processing plants - Gas chromatography-mass spectrometry - Industrial sources - Odor concentrations - Odor pollution - Surrounding environment
Classification code:461.6  Medicine and Pharmacology - 461.7  Health Care - 801  Chemistry - 802.3  Chemical Operations - 804.1  Organic Compounds - 822  Food Technology - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 1.35e+01%, Percentage 3.04e+01%, Percentage 5.63e+01%, Percentage 7.63e+01%
DOI:10.13227/j.hjkx.201705066

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 139>

Accession number:20183905856742
Title:Characteristics of Particulate and Inorganic Elements of Motor Vehicles Based on a Tunnel Environment
Authors:Li, Feng-Hua (1); Zhang, Yan-Jie (1); Zhang, Jing (1); Yuan, Yuan (1); Wu, Lin (1); Mao, Hong-Jun (1) 
Author affiliation:(1) Centre for Urban Transport Emission Research, College of Environmental Science and Engineering, Nankai University, Tianjin; 300071, China 
Corresponding author:Wu, Lin(dr.wu@msn.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1014-1022
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Respirable particulate matter(PM<inf>2.5</inf>)samples were collected at different locations (inside and outside the tunnel) at the Zhang Zizhong Tunnel in Tianjin in September 2015. Seventeen inorganic elements were measured, and the sources were analyzed by the PCA receptor model. The results show that the daily average concentration of PM<inf>2.5</inf> inside and outside the tunnel is (94.79&plusmn;62.78) &mu;g&bull;m<sup>-3</sup> and (83.92&plusmn;61.60) &mu;g&bull;m<sup>-3</sup>, respectively. The concentration during the working day is higher than on a non-working day, and, to a certain extent, PM<inf>2.5</inf> concentration in the tunnel during peak periods is correlated with the vehicle flow, which indicates that PM<inf>2.5</inf> concentration is affected by motor vehicle pollution seriously. In the tunnel, the concentrations of Si, Fe, Al, Ca, and Mg are higher, the mass fraction reach 98.48% of all analyzed elements and these elements are less affected by vehicles. Fe and trace heavy metals (Zn, Cu, and Pb) are related closely to motor vehicle pollution. From the Wilcoxon Signed-Rank test, there are significant differences in Ba, Cu, Zn, Mo, Sn, and Sb inside and outside the tunnel. Enrichment factors inside and outside the tunnel show that the enrichment factor ratios of Co, Mn, Cr, Ca, Mg, Ba, Fe, Mo, and V are less than 5, which are mainly from the crust. In addition, the enrichment factor ratios of Cu, Zn, Pb, Sn, Sb, and Cd are greater than 5, which are affected largely by anthropogenic sources. The factor analysis indicates that the main pollution sources in the tunnel are the mixed sources of wear and the combustion of fuel, the dust, and the combustion of diesel vehicles. In addition, in order to analyze the source of motor vehicle pollution further, a factor analysis indicates that the main pollution sources are tire wear and exhaust emission, brake wear and exhaust emissions, and diesel emissions.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:39
Main heading:Air pollution
Controlled terms:Combustion - Factor analysis - Fuels - Heavy metals - Multivariant analysis - Trace elements - Tunnels - Vehicles - Wear of materials
Uncontrolled terms:Anthropogenic sources - Average concentration - Enrichment factors - Inorganic elements - Respirable particulate matters - Tianjin - Tunnel environments - Wilcoxon signed rank test
Classification code:401.2  Tunnels and Tunneling - 451  Air Pollution - 531  Metallurgy and Metallography - 922  Statistical Methods - 922.2  Mathematical Statistics - 951  Materials Science
Numerical data indexing:Percentage 9.85e+01%
DOI:10.13227/j.hjkx.201706226

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 140>

Accession number:20183905856830
Title:VOCs Emission Inventory of Service Stations in a Subcenter (Tongzhou District) of the City of Beijing
Authors:Huang, Yu-Hu (1, 2); Hu, Wei (2); Li, Bei-Bei (3); Ji, Xuan (4); Xiao, Yu (5); Ren, Bi-Qi (2); Qin, Jian-Ping (2) 
Author affiliation:(1) School of Environmental Science and Engineering, Tianjin University, Tianjin; 300072, China; (2) Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Control Technology and Applications, Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (3) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (4) Beijing Tongzhou District Environmental Protection Bureau, Beijing; 101100, China; (5) Beijing Vehicle Emission Management Centre, Beijing; 100176, China 
Corresponding author:Ren, Bi-Qi(renbiqi89@sina.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:618-625
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:As a subcenter of the city of Beijing, Tongzhou District is faced with enormous pressure from the rapid growth of VOCs emissions from service stations. In this study, a set of bottom-up VOCs inventory estimation methods for service stations in Tongzhou District is established. Using local VOCs emission factors of service stations in Beijing, combined with gasoline and diesel sales from every service station, a high resolution VOCs emission inventory of service stations in Tongzhou District from 2015 to 2022 was established. The results showed the following. &#9312;An online monitoring system (OMS) based on unloading, refueling, and tank pressure vapor emission control measures can reduce the VOCs emission factor from 190 mg&bull;L<sup>-1</sup> to 115 mg&bull;L<sup>-1</sup>, and when the percent onboard refueling vapor recovery system (ORVR) Penetration reaches to about 50%, the emission factors can be reduced to 131 mg&bull;L<sup>-1</sup> and 96 mg&bull;L<sup>-1</sup>, respectively. The VOCs emission factor (13 mg&bull;L<sup>-1</sup>) of diesel from the service station is 0.8% of the uncontrolled emission factor (1 552 mg&bull;L<sup>-1</sup>) of gasoline. &#9313;The amount of VOCs emissions from service stations in Tongzhou District was 97.8 t&bull;a<sup>-1</sup> in 2015, and the emissions of gasoline and diesel were 96.2 t&bull;a<sup>-1</sup> and 1.6 t&bull;a<sup>-1</sup>, respectively, accounting for 98.4% and 1.6%. The emissions were mainly concentrated in the area surrounding the new Beijing Municipal Government site. &#9314;After implementation of the vapor recovery requirements of "Beijing's Clean Air Action Plan from 2013-2017," considering the increase in oil sales from 2017 to 2022, VOCs emissions of gasoline and diesel from service stations will decrease by 9% and 6%, respectively, compared to those of 2015 in Tongzhou District. Assuming that the OMS will also be installed at 28 (2 000-5 000) t&bull;a<sup>-1</sup> service stations by the end of 2022, VOCs emissions of service stations will be reduce by 13% compared to those of 2015. &#9315;The measure of restricting the number of vehicles in operation by 50% can reduce VOCs emissions of service stations by (22&plusmn;12)% every day during 2014 Asia-Pacific Economic Cooperation conference (APEC). &#9316;It is suggested to strengthen vapor recovery supervision on service stations in the area surrounding the new Beijing Municipal Government site, and in summer and refueling idle such as in noon.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Filling stations
Controlled terms:Emission control - Gasoline - Recovery - Unloading - Volatile organic compounds
Uncontrolled terms:Beijing city - Economic Co-operation - Emission inventories - Municipal government - Number of vehicles - On-line monitoring system - Uncontrolled emissions - Vapor recovery system
Classification code:451.2  Air Pollution Control - 523  Liquid Fuels - 691.2  Materials Handling Methods - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 1.30e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 1.31e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 1.55e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 1.90e-01kg/m3 to 1.15e-01kg/m3, Mass_Density 9.60e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.30e+01%, Percentage 1.60e+00%, Percentage 5.00e+01%, Percentage 6.00e+00%, Percentage 8.00e-01%, Percentage 9.00e+00%, Percentage 9.84e+01%
DOI:10.13227/j.hjkx.201702037

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 141>

Accession number:20183905856840
Title:Contamination Levels and Exposure Risk via Drinking Water from Perfluoroalkyl Acids in Seven Major Drainage Basins of China
Authors:Wang, Xin-Xuan (1, 2); Zhang, Hong (2); Wang, Yan-Ping (1); Luo, Ji (3) 
Author affiliation:(1) College of Food Engineering and Biotechnology, Tianjin University of Science &amp; Technology, Tianjin; 300457, China; (2) College of Physics and Energy, Shenzhen University, Shenzhen; 518060, China; (3) College of Physics Science and Technology, Dalian University, Dalian; 116622, China 
Corresponding author:Zhang, Hong(zhangh@szu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:703-710
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To study the perfluoroalkyl acid (PFAAs) contamination in seven major drainage basins of China and the exposure risk to resident populations via drinking water sourced from these basins, a risk assessment model of the US EPA and a scenario-based risk assessment method were applied to analyze the PFAA pollution characteristics and to evaluate the average daily dose and health risk to adults, adolescents, and children. In the intermediate-exposure scenario, results showed that the &sum;PFAAs median for the seven major drainage basins was 14 ng&bull;L<sup>-1</sup>, with perfluorooctanoic acid (PFOA), perfluorobutanoic acid (PFBA), and perfluorooctane sulfonic acid (PFOS) the main contaminants, and that the contamination levels were the highest in the Songliao River and Taihu Lake basins. In the high-exposure scenario, the discharge proportion of perfluoroalkyl carboxylic acids with&le;6 carbon chains among the &sum;PFAAs was higher than that in the intermediate-exposure scenario. In addition, certain sections tended to be more polluted than others in the Yellow River and Yangtze River basins. Risk assessment showed that PFOA and PFOS exposure via drinking water posed no health risk to Chinese residents, and that the average daily ingestion of drinking water of Chinese adolescents was below the suggested amount.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:50
Main heading:River pollution
Controlled terms:Catchments - Contamination - Health risks - Potable water - Risk assessment - Risk perception - Rivers
Uncontrolled terms:Average daily dose (ADD) - Perfluoroalkyl acids - Perfluorooctane acid (PFOA) - Perfluorooctane sulfonic acids - Pollution level - Risk assessment models
Classification code:444  Water Resources - 453  Water Pollution - 461.7  Health Care - 914.1  Accidents and Accident Prevention
Numerical data indexing:Mass_Density 1.40e-08kg/m3 to 2.20e-02kg/m3
DOI:10.13227/j.hjkx.201705100

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 142>

Accession number:20183905856423
Title:Source Apportionment of Heavy Metals in Farmland Soils Around Mining Area Based on UNMIX Model
Authors:Lu, Xin (1, 2, 3); Hu, Wen-You (1); Huang, Biao (1); Li, Yuan (2); Zu, Yan-Qun (2); Zhan, Fang-Dong (2); Kuang, Rong-Xi (4) 
Author affiliation:(1) Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (2) College of Resources and Environment, Yunnan Agricultural University, Kunming; 650201, China; (3) Shanghai Geotechnical Engineering &amp; Geology Institute Co., Ltd., Shanghai; 200072, China; (4) Geological Survey of Jiangsu Province, Nanjing; 210018, China 
Corresponding author:Hu, Wen-You(wyhu@issas.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1421-1429
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Forty-two farmland soil samples were collected from the mining area of Huize City, Yunnan Province, to identify the sources of metals in the farmland soils, and 14 selected elements in farmland soils were detected. The UNMIX model was applied to identify the sources of the metals. The inverse distance weighted interpolation method of statistical analysis in ArcGIS was used to develop a spatial distribution map of the six severely polluted metals to validate the source apportionment results of the UNMIX model. The results indicated that: &#9312; the metals, Pb, Zn, and Cd, in the studied farmland soils were seriously polluted according to the soil background values of Yunnan Province and the Chinese environmental quality standard; &#9313; there were three potential sources of metals according to UNMIX model: source 1 was the anthropogenic sources caused by industrial activities with a source contribution rate of 16.32%; source 2 was the anthropogenic sources caused by coal combustion and fertilization with a source contribution rate of 68.26%; and source 3 was the combined sources caused by mining related activities and soil parent materials with a source contribution rate of 15.42%; and &#9314; the spatial distribution of selected metals was in accordance with the local land-use and the results of the UNMIX model. Therefore, the UNMIX model can be effectively applied to the source apportionment of heavy metals in farmland soils around the mining area.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Farms
Controlled terms:Coal combustion - Heavy metals - Inverse problems - Land use - Mining - Soil surveys - Soils - Spatial distribution
Uncontrolled terms:Anthropogenic sources - Environmental quality standards - Farmland soils - Industrial activities - Inverse distance-weighted interpolation - Source apportionment - Source contributions - Spatial distribution map
Classification code:403  Urban and Regional Planning and Development - 483.1  Soils and Soil Mechanics - 502.1  Mine and Quarry Operations - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 531  Metallurgy and Metallography - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 921  Mathematics
DOI:10.13227/j.hjkx.201705254

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 143>

Accession number:20183905856766
Title:Preparation of PAAm/HACC Semi-Interpenetrate Network Hydrogel and Its Adsorption Properties for Humic Acid from Aqueous Solution
Authors:Liu, Ze-Jun (1); Zhou, Shao-Qi (1, 2); Ma, Fu-Zhen (1) 
Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou; 510640, China 
Corresponding author:Zhou, Shao-Qi(fesqzhou@scut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1233-1240
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:New absorbents, polyacrylamide/chitosan quaternary ammonium salt semi-interpenetrate network hydrogels [(PAAm/HACC semi-IPN) (s-IPN 1.5), and (s-IPN 3)], were successfully prepared via in situ polymerization by thermal synthesis for the removal of humic acid (HA) from aqueous solution. The materials were characterized by SEM, FT-IR, and XRD. The adsorption behaviors of adsorbents for HA were investigated as a function of pH, ionic strength, contact time, initial HA concentration, and temperature. The results showed that s-IPN 3 outperformed s-IPN 1.5. The adsorption capacity of the adsorbent for HA decreased with an increase in solution pH and decrease of temperature, and low ionic strength was conducive to the adsorption of HA. The adsorption kinetics fitted to a pseudo-second-order kinetic model and the adsorption isotherms could be described by the Sips isotherm model. The impressive maximum adsorption capacity could reach 238.08 mg&bull;g<sup>-1</sup> at the condition of pH=7.0, ionic strength=0.01 mol&bull;L<sup>-1</sup>, and T=298 K. The adsorbent could remove HA from aqueous solution efficiently.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:34
Main heading:Adsorption
Controlled terms:Adsorbents - Biological materials - Hydrogels - Ionic strength - Organic acids - Polyacrylates - Salt removal - Salts - Solutions
Uncontrolled terms:Adsorption behavior - Adsorption capacities - Adsorption properties - Chitosan quaternary ammonium salts - Humic acid - In-situ polymerization - Pseudo-second-order kinetic models - Quaternary ammonium salt
Classification code:461.2  Biological Materials and Tissue Engineering - 801.4  Physical Chemistry - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 815.1.1  Organic Polymers
DOI:10.13227/j.hjkx.201707019

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 144>

Accession number:20183905856827
Title:Emission Inventory of Anthropogenically Sourced VOCs and Its Contribution to Ozone Formation in Jiangsu Province
Authors:Xia, Si-Jia (1); Liu, Qian (1); Zhao, Qiu-Yue (1) 
Author affiliation:(1) Jiangsu Key Laboratory of Environmental Engineering, Jiangsu Province Academy of Environmental Science, Nanjing; 210036, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:592-599
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on statistical activity data, emission factors, and source profiles, an emission inventory of anthropogenic-speciated VOCs in Jiangsu province in 2015 was calculated. The ozone formation potential (OFP) of VOCs was estimated by the maximum incremental reactivity (MIR). The result showed that the total anthropogenic emission amount of VOCs in Jiangsu Province was 1 927.8 kt in 2015. Fossil fuel combustion, industrial processes, solvent utilization, biomass burning, vehicles, and storage and transport contributed 7.38%, 27.93%, 39.56%, 3.55%, 16.18%, and 5.39%, respectively. Suzhou, Nanjing, and Xuzhou were the three cities with the highest amount, contributing more than 200 kt of VOCs. The total amount of OFP from 56 ozone-precursor VOCs was 5 429.5 kt. The contribution to OFP from the equipment manufacturing, vehicles manufacturing and building decoration was 30%-60% more than their contribution to the emissions. The coating VOC reduction would be more efficient for alleviating O<inf>3</inf> pollution. The 10 VOC species with the largest OFP contribution were m/p-xylene, ethylene, propylene, 1,3-butadiene, toluene, o-xylene, 1-butene, ethylbenzene, 1,2,4-trimethylbenzene, and p-ethyltoluene, which contributed 75.63% of the total OFP.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:47
Main heading:Ozone
Controlled terms:Digital storage - Ethylene - Fossil fuels - Fuel storage - Manufacture - Volatile organic compounds
Uncontrolled terms:Emission factors - Emission inventories - Jiangsu province - Ozone formation potentials - Source profiles
Classification code:537.1  Heat Treatment Processes - 694.4  Storage - 722.1  Data Storage, Equipment and Techniques - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Percentage 3.96e+01%, Percentage 5.39e+00%, Percentage 7.38e+00%, Percentage 7.56e+01%, Percentage 1.62e+01%, Percentage 2.79e+01%, Percentage 3.00e+01% to 6.00e+01%, Percentage 3.55e+00%
DOI:10.13227/j.hjkx.201705218

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 145>

Accession number:20183905856764
Title:Fabrication of a Biomass-Based Hydrous Zirconium Oxide Nanocomposite for Advanced Phosphate Removal
Authors:Qiu, Hui (1); Qin, Zhi-Feng (1); Liu, Feng-Ling (1); Liang, Chen (1); Song, Ming-Xia (1); Xu, Zheng-Wen (1); Guan, Yi-Dong (1) 
Author affiliation:(1) Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), School of Environmental Science and Engineering, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1212-1219
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Wheat straws were modified by 3-chloro-2-hydroxypropyl trimethylammonium chloride (CTA) to obtain aminated wheat straw St-N'. The optimum synthetic conditions were determined to be NaOH with 30% mass fraction, CTA of 100 mL, reaction temperature of 80&#8451;, and reaction time of 3 h, which was verified by orthogonal experiments. Nano-sized hydrous zirconium oxides (HZO) were immobilized into St-N' by an in situ precipitation method to obtain the nanocomposite St-N'-Zr. The SEM, TEM, XRD, and BET results indicated that the nano-sized HZO with 50-100 nm sizes were uniformly loaded onto the inner surface of the biomass-based carrier St-N' that was amorphous in nature. A Langmuir adsorption isotherm fitted the adsorption process well, and the maximum adsorption amount was calculated to be 33.90 mg&bull;g<sup>-1</sup>. The optimal pH range was 1.8-6.0, displaying good removal capacity of phosphate in acidic waters. In the presence of high levels of competing anions, the phosphate adsorption still retained more than 70% of the original amount, showing the higher preference of St-N'-Zr towards phosphate than towards the commercial anion exchanger D-201. After 10 cycles of adsorption-desorption, the removal efficiency remained stable, confirming the good regeneration ability and potential application of St-N'-Zr.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Zirconium compounds
Controlled terms:Adsorption - Chlorine compounds - Ion exchangers - Nanocomposites - Negative ions - Oxides - Phosphates - Precipitation (chemical) - Sodium hydroxide - Straw
Uncontrolled terms:Adsorption desorption - In-situ precipitation - Langmuir adsorption isotherms - Optimum synthetic condition - Orthogonal experiment - Regeneration - Removal efficiencies - Wheat straws
Classification code:761  Nanotechnology - 802.1  Chemical Plants and Equipment - 802.3  Chemical Operations - 804  Chemical Products Generally - 821.5  Agricultural Wastes - 933  Solid State Physics
Numerical data indexing:Percentage 3.00e+01%, Percentage 7.00e+01%, Size 5.00e-08m to 1.00e-07m, Time 1.08e+04s, Volume 1.00e-04m3
DOI:10.13227/j.hjkx.201706118

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 146>

Accession number:20183905856753
Title:Characteristics of Nitrogen Release at the Sediment-Water Interface in the Typical Tributaries of the Three Gorges Reservoir During the Sensitive Period in Spring
Authors:Li, Xin (1); Song, Lin-Xu (1); Ji, Dao-Bin (1); Liu, De-Fu (2); Su, Qing-Qing (1); L&uuml;, Lin-Peng (1); Wang, Xiong (1); Huang, Ya-Nan (1); Wu, Qing (1) 
Author affiliation:(1) College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang; 443002, China; (2) Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan; 430068, China 
Corresponding author:Ji, Dao-Bin(dbjictgu@hotmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1113-1121
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Overlying water and sediment interstitial water samples were acquired to study the nitrogen release between sediments and water interfaces in Xiangxi Bay in April 2016 during the Sensitive Period in spring. The spatial distribution of different forms of nitrogen in the sediment was analyzed, the diffusion fluxes of different forms of nitrogen in the sediments and water systems were also measured, and a correlation analysis with environmental factors was conducted. The results show that overlying water and sediment interstitial water &rho;(TN) ranges from 1.10 to 6.90 mg&bull;L<sup>-1</sup> and 6.19 to 32.57 mg&bull;L<sup>-1</sup> respectively; indicating the nitrogen concentrations in the overlying and interstitial water of sediments have a certain variation along the process and vertically. The interstitial water nitrogen concentrations in the upstream area are higher than those in the downstream area. The interstitial water &rho;(NH<inf>4</inf><sup>+</sup>-N) in the sediment is significantly larger than that in the overlying water, but the interstitial water &rho;(NO<inf>3</inf><sup>-</sup>-N) in the sediment is slightly smaller than that in the overlying water. Xiangxi Bay sediment acts as a source of NH<inf>4</inf><sup>+</sup>-N; however, for NO<inf>3</inf><sup>-</sup>-N it is a sink. The diffusive fluxes of NH<inf>4</inf><sup>+</sup>-N range from 2.70 to 4.72 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup>; and the diffusive fluxes of NO<inf>3</inf><sup>-</sup>-N range from -1.61 to -0.62 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup>. Nitrogen is mainly present in the form of ammonium nitrogen in the sediment of Xiangxi Bay. The &rho;(NH<inf>4</inf><sup>+</sup>-N) in the sediment ranges from 69.97-1 185.97 mg&bull;kg<sup>-1</sup>, &rho;(NO<inf>3</inf><sup>-</sup>-N) ranges from 2.78-38.17 mg&bull;kg<sup>-1</sup>, and the &rho;(NH<inf>4</inf><sup>+</sup>-N) in sediments in the surface at 0-8 cm changes with the same trend.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Sediments
Controlled terms:Nitrogen - Reservoirs (water) - Rivers
Uncontrolled terms:Correlation analysis - Diffusive flux - Environmental factors - Nitrogen concentrations - Sediment water interface - Sediments and waters - Three gorges reservoir - Xiangxi bays
Classification code:441.2  Reservoirs - 483  Soil Mechanics and Foundations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 1.10e-03kg/m3 to 6.90e-03kg/m3, Mass_Density 6.19e-03kg/m3 to 3.26e-02kg/m3, Size 0.00e+00m to 8.00e-02m
DOI:10.13227/j.hjkx.201707139

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 147>

Accession number:20183905856859
Title:Effect of Aeration Rate on Shortcut Nitrification Recovery in Intermittent Aeration Mode
Authors:Liu, Hong (1); Nan, Yan-Bin (1); Li, Hui (1); Wang, Xiang (1); Peng, Yong-Zhen (2); Chen, Yong-Zhi (1) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, Beijing University of Technology, Beijing; 100124, China 
Corresponding author:Chen, Yong-Zhi(476411589@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:865-871
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Shortcut nitrification sludge, which was set aside for two months, was recovered using Reactors &#8544;, &#8545;, &#8546;, and &#8547;. The aeration rates of Reactors &#8544;, &#8545;, &#8546;, and &#8547; were 120, 100, 80, and 60 L&bull;h<sup>-1</sup>, respectively, while treating real domestic sewage, and the ratio of aerobic/anoxic was 30 min/30 min at the temperature of 25&#8451;. The influent of ammonia was 50-80 mg&bull;L<sup>-1</sup>, and the concentration of effluent ammonia was stable, at below 5 mg&bull;L<sup>-1</sup>, after the 12<sup>th</sup>, 18<sup>th</sup>, 21<sup>st</sup>, and 21<sup>st</sup> cycles. The removal ratio of ammonia nitrogen was about 95%. The highest concentrations of nitrite for Reactors &#8544;, &#8545;, &#8546;, and &#8547; were 20.83, 22.81, 21.50, and 20.73 mg&bull;L<sup>-1</sup>, respectively, which occurred in the 30<sup>th</sup>, 35<sup>th</sup>, 38<sup>th</sup>, and 42<sup>nd</sup> cycles, respectively. The concentrations of effluent nitrate were lower than 0.5 mg&bull;L<sup>-1</sup>, and the nitrite accumulation rates were higher than 99%. The activity of ammonia-oxidizing bacteria (AOB) increased gradually and finally stabilized at 100.00%; however, the activity of nitrite-oxidizing bacteria (NOB) was gradually inhibited. The recovery of shortcut nitrification was achieved successfully in the different aeration modes.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Sewage aeration
Controlled terms:Ammonia - Bacteria - Nitration - Nitrification - Nitrogen removal - Recovery - Sewage
Uncontrolled terms:Activity recovery - Aeration rate - Ammonia nitrogen - Ammonia oxidizing bacteria - Intermittent aeration - Nitrite accumulation - Nitrite-oxidizing bacteria - Shortcut nitrification
Classification code:452.1  Sewage - 452.2  Sewage Treatment - 802.2  Chemical Reactions - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 2.07e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-02kg/m3 to 8.00e-02kg/m3, Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 9.50e+01%, Percentage 9.90e+01%
DOI:10.13227/j.hjkx.201707029

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 148>

Accession number:20183905856833
Title:Composite CVOCs Removal in a Combined System of Nonthermal Plasma and a Biotrickling Filter
Authors:Guo, Hai-Qian (1); Miao, Jing-Jing (1); Jiang, Li-Ying (1); Zhang, Di (1) 
Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310032, China 
Corresponding author:Jiang, Li-Ying(jiangly@zjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:640-647
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A coupling system of nonthermal plasma and a biotrickling filter was used to remove a gas mixture of chlorobenzene (CB) and dichloromethane (DCE). The effects of inlet gas concentration and gas flow rate on the removal of the target pollutants in the coupling system were investigated at the frequency of 10 000 Hz and specific input energy (SIE) of 6 111 J&bull;L<sup>-1</sup>. Furthermore, the advantages of the plasma-bio-coupled system were revealed by analyzing the relationship between the degradation products and SIE, biomass, or biodiversity in the biotrickling filter. The results showed that when the SIE and gas flow rate were constant, increasing the initial concentration would decrease the removal efficiency of the mixed gas. The optimal appropriate gas flow rate was 0.71 L&bull;min<sup>-1</sup> when considering the cost. The CO<inf>2</inf> production amount, CO<inf>2</inf> selectivity, and chloride ion concentration increased with the increase of SIE when both the CB and DCE concentrations were 500 mg&bull;m<sup>-3</sup> and the gas flow rate was 0.71 L&bull;min<sup>-1</sup>. The protein content of the biofilter column gradually increased as the reactor operation progressed, and the biomass of the lower layer was higher than that of the upper layer. The high-throughput sequencing analysis showed that the biological community in the biotrickling filter keeped rich and diversified.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Biofilters
Controlled terms:Biodiversity - Carbon dioxide - Degradation - Dichloromethane - Flow of gases - Flow rate - Gases - Passive filters
Uncontrolled terms:Bio-trickling filters - Chloride ion concentration - Chlorobenzene - Coupled systems - High-throughput sequencing - Initial concentration - Nonthermal plasma - Specific input energies
Classification code:454  Environmental Engineering - 631  Fluid Flow - 631.1.2  Gas Dynamics - 703.2  Electric Filters - 802.2  Chemical Reactions - 804.1  Organic Compounds - 804.2  Inorganic Compounds
Numerical data indexing:Frequency 1.00e+04Hz
DOI:10.13227/j.hjkx.201703280

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 149>

Accession number:20183905856776
Title:Effect of NO<inf>x</inf><sup>-</sup>-N Recycling Ratio on Denitrifying Phosphorus Removal Efficiency in the ABR-MBR Combined Process
Authors:L&uuml;, Liang (1, 2); You, Wen (1, 2); Zhang, Min (1, 2); Wu, Peng (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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1309-1315
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on the coupling of the ABR process and the MBR process, a novel combined ABR-MBR process, including biophase separation, liquid circulation, and functional linkage, was developed to achieve simultaneous carbon, nutrient, and phosphorus removal when treating domestic wastewater with low carbon/nitrogen ratio and to obtain the best combination of ABR, providing a quality carbon source, and MBR, achieving shortcut nitrification by optimizing hydraulic retention time (HRT). The influence of NO<inf>x</inf><sup>-</sup>-N recycling ratio on nitrogen and phosphorus removal was investigated at NO<inf>x</inf><sup>-</sup>-N recycling ratios of 100%, 200%, 300%, and 400%, respectively. The experimental results under different conditions showed that the efficiency of denitrifying phosphorus removal in the ABR was found to increase with increasing NO<inf>x</inf><sup>-</sup>-N recycling ratio from 100% to 300% but decreased when the NO<inf>x</inf><sup>-</sup>-N recycling ratio was 400%. Shortcut nitrification was achieved by controlling the low dissolved oxygen (DO) concentration ranges from 0.3 to 1.0 mg&bull;L<sup>-1</sup> with the short HRT of 3 h in the MBR reactor. The nitrite accumulation ratio was above 60%, when the NO<inf>x</inf><sup>-</sup>-N recycling ratio was 300%. Meanwhile, shortcut denitrifying phosphorus removal (where NO<inf>2</inf><sup>-</sup>-N mainly acted as the electron acceptor for denitrifying phosphorus removal) was achieved and played the dominant role in phosphorus removal.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:24
Main heading:Nitrogen removal
Controlled terms:Carbon - Denitrification - Dissolved oxygen - Efficiency - Nitration - Nitrification - Nitrogen oxides - Phosphorus - Recycling - Wastewater treatment
Uncontrolled terms:Bio-phase separations - Denitrifying phosphorus removal - Hydraulic retention time - Low dissolved oxygen - Nitrite accumulation - Nitrogen and phosphorus removal - Recycling ratio - Shortcut nitrification
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 - 913.1  Production Engineering
Numerical data indexing:Mass_Density 3.00e-04kg/m3 to 1.00e-03kg/m3, Percentage 1.00e+02%, Percentage 1.00e+02% to 3.00e+02%, Percentage 2.00e+02%, Percentage 3.00e+02%, Percentage 4.00e+02%, Percentage 6.00e+01%, Time 1.08e+04s
DOI:10.13227/j.hjkx.201707197

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 150>

Accession number:20183905856852
Title:Effect of Sulfur to Quartz Sand Ratios on the Removal of High-Concentration Perchlorate in Packed-Bed Reactors
Authors:Tao, Hua-Qiang (1); Shao, Dong-Hai (2); Zhang, Chao (1); Song, Yuan-Yuan (1); Lu, Cai-Cai (1); Guo, Jian-Bo (1) 
Author affiliation:(1) Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin; 300384, China; (2) Dalian Environmental Engineering Assessment Center, Dalian; 116023, China 
Corresponding author:Guo, Jian-Bo(jianbguo@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:811-818
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Three autotrophic packed-bed reactors, each with a different sulfur/quartz sand ratio(R1, 2:1; R2, 1:1; R3, 1:2,)were used to remove high-concentration perchlorate from contaminated water. The perchlorate removal efficiency, kinetics, and biofilm of the reactors were studied using different perchlorate concentrations and hydraulic retention times (HRTs). The perchlorate removal efficiency decreased with higher perchlorate concentration and shorter HRT, and the removal efficiency of R1 was higher than of R2 and R3. The maximum removal loading of R1 was 2.18 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>at an HRT of 3.2 h and perchlorate concentration of 300 mg&bull;L<sup>-1</sup>. The half-order kinetics model fit the reactors' experimental data well; the reaction rate constants of R1, R2, and R3 were 8.036, 6.596, and 4.212 mg<sup>1/2</sup>&bull;(L<sup>1/2</sup>&bull;h)<sup>-1</sup>. The yield of SO<inf>4</inf><sup>2-</sup> was greater than the stoichiometric yield of sulfur autotrophic reduction owing to sulfur disproportionation. The disproportionation was inhibited with a higher perchlorate concentration or shorter HRT. Moreover, disproportionation of R3 was the weakest because the SO<inf>4</inf><sup>2-</sup> yield of R3 was lower than of R1 and R2. The pH and alkalinity of the effluent increased with lower perchlorate concentration and shorter HRT. The development of biofilm in R2 and R3 was better than in R1. The secretion of extracellular polymeric substances can promote the formation of biofilm.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Inorganic compounds
Controlled terms:Alkalinity - Biofilms - Chemical reactors - Efficiency - Effluents - Enzyme kinetics - Kinetics - Packed beds - Polymers - Rate constants  - Sulfur - Water pollution
Uncontrolled terms:Disproportionations - Extracellular polymeric substances - Half-order kinetics - Hydraulic retention time - Perchlorate - Perchlorate concentration - Perchlorate removal - Removal efficiencies
Classification code:452.3  Industrial Wastes - 453  Water Pollution - 462.5  Biomaterials (including synthetics) - 801.1  Chemistry, General - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 815.1  Polymeric Materials - 913.1  Production Engineering - 931  Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Mass_Density 3.00e-01kg/m3 to 2.20e-02kg/m3, Time 1.15e+04s
DOI:10.13227/j.hjkx.201706182

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 151>

Accession number:20183905856783
Title:Diffusion of Microorganism and Main Pathogenic Bacteria During Municipal Treated Wastewater Discharged into Sea
Authors:Xu, Ai-Ling (1); Niu, Cheng-Jie (1); Song, Zhi-Wen (1); Lang, Xiu-Lu (1); Guo, Ming-Yue (1) 
Author affiliation:(1) Institute of Environment and Municipal Engineering, Qingdao University of Technology, Qingdao; 266033, China 
Corresponding author:Song, Zhi-Wen(songzhiwen@qtech.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1365-1378
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Numerous microorganisms, especially pathogens, exist in treated wastewater, which leads to possible risk to population health and marine ecological security when treated wastewater is discharged into the sea. This study selects Maidao municipal sewage treatment plant as the location. The microbial community and the dynamic distribution and seasonal variation of pathogens are analyzed by high-throughput sequencing technology. The results showed that the microbes in the discharge were distributed into 20 to 27 phyla, and the dominant phyla were Proteobacteria, Firmicutes, and Bacteroidetes, which were mainly distributed in 44 to 65 classes. The predominant pathogens are mainly composed of Gammaproteobacteria, Betaproteobacteria, and Epsilonproteobacteria in the Proteobacteria category. The proportion of most dominant phyla and classes in the sample decreased with an increase in diffusion distance. There were mainly 55 species pathogenic bacteria in the water discharging into the sea. The pathogenic genes in the discharge were mainly related to cancer, cardiovascular disease, immune system diseases, infectious diseases, metabolic diseases, and neurodegenerative diseases. When compared with the blank samples, it was found that the biomass of pathogenic bacteria decreased sharply with the diffusion by the seawater, and most of the pathogens were not detected 1000 m away from the seashore. Arcobacter spp. caused human and animal diarrhea and bacteremia, Acinetobacter spp. caused nosocomial infections, and Shewanella hafniensis posed a threat to seafood farming and fishing. The three species of pathogenic bacteria mentioned above occupied a fairly large proportion of the discharge into the sea.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Bacteria
Controlled terms:Bacteriology - Diffusion - Health risks - Neurodegenerative diseases - Pathogens - Sewage treatment plants - Wastewater treatment
Uncontrolled terms:Cardio-vascular disease - Dynamic distribution - High-throughput sequencing - Microbial communities - Microbial community structures - Municipal sewage treatment plant - Nosocomial infection - Treated wastewater
Classification code:452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 461  Bioengineering and Biology
Numerical data indexing:Size 1.00e+03m
DOI:10.13227/j.hjkx.201705075

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 152>

Accession number:20183905856745
Title:Particulate Component Emission Characteristic from a Diesel Bus with DOC and CDPF
Authors:Lou, Di-Ming (1); Geng, Xiao-Yu (1); Song, Bo (1); Tan, Pi-Qiang (1); Hu, Zhi-Yuan (1); Liu, Ji-Yue (1) 
Author affiliation:(1) School of Automotive Studies, Tongji University, Shanghai; 201804, China 
Corresponding author:Geng, Xiao-Yu(gengxiaoyu233@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1040-1045
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A diesel bus was tested with a China City Bus Cycle (CCBC) on a heavy chassis dynamometer, and the components of the particulate emissions with different after-treatment equipment were investigated. Results showed that OC was less than EC in the particulates of the bus emissions without the use of after-treatment equipment. The organic components were mainly fatty acids (60.9%) and n-alkanes (32.4%), with a few hopanes and PAHs. Fatty acid components were mainly C<inf>16:0</inf>, C<inf>18</inf>, C<inf>14</inf>, and C<inf>18:1</inf>. The n-alkanes were mainly C<inf>18</inf>-C<inf>24</inf>, with C<inf>21</inf>H<inf>44</inf> and C<inf>22</inf>H<inf>46</inf> accounting for the greatest portion. PAH mass was concentrated in medium and small molecular weight components, such as Pyr, FL, and PA. While PAH toxicity was dominated by medium and high molecular weight components, BaP was the most toxic, followed by B(b+k)F, BaA, and IcdP. The total toxicity of the PAHs decreased by 2.7% after DOC treatment and continued to decrease by 89.6%-93.8% after CDPF treatment. After-treatment equipment significantly reduced the OC+EC emissions by 18.9% (DOC) and 70.5%-72.5% (CDPF), but the reduction rate varied from one component to another. The different precious metal loadings of the CDPF did not obviously affect the reduction rate.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Particulate emissions
Controlled terms:Barium compounds - Buses - Dynamometers - Fatty acids - Molecular weight - Paraffins - Toxicity
Uncontrolled terms:After-treatment - CCBC - Diesel bus - PAH toxicities - Particulate components
Classification code:451.1  Air Pollution Sources - 461.7  Health Care - 663.1  Heavy Duty Motor Vehicles - 804.1  Organic Compounds - 931.3  Atomic and Molecular Physics - 943.1  Mechanical Instruments
Numerical data indexing:Percentage 1.89e+01%, Percentage 2.70e+00%, Percentage 3.24e+01%, Percentage 6.09e+01%, Percentage 7.05e+01% to 7.25e+01%, Percentage 8.96e+01% to 9.38e+01%
DOI:10.13227/j.hjkx.201705049

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 153>

Accession number:20183905856737
Title:Important Effect of Secondary Inorganic Salt Extinction on Visibility Impairment in the Northern Suburb of Nanjing
Authors:Yu, Chao (1); Yu, Xing-Na (1); Zhao, Tian-Liang (1); Zhang, Lei (1); Ma, Guo-Xu (1); Wang, Yong-Wei (1) 
Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing; 210044, China 
Corresponding author:Zhao, Tian-Liang(tlzhao@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:972-979
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Observed data regarding the visibility and aerosol chemical composition from May 2013 to May 2014 were used to analyze the variation of visibility, the relationship between aerosol chemical composition and visibility variations, and their contributions to atmospheric light extinction. An important effect of secondary inorganic salt extinction on the visibility impairment was determined. The present study suggests that the average visibility during the observation period was (6.78&plusmn;3.68) km, and there was obvious seasonal variation in the visibility. Fine particles with size less than 2.1 &mu;m have a great influence on visibility, with the main chemical components of SO<inf>4</inf><sup>2-</sup>, NO<inf>3</inf><sup>-</sup>, NH<inf>4</inf><sup>+</sup>, and OC. The secondary inorganic ions make significant contributions to visibility degradation. The mean light extinction coefficient of Nanjing was (527.2&plusmn;295.2) Mm<sup>-1</sup>, which was calculated by using the revised IMPROVE equation. Regarding the chemical composition of PM<inf>2.1,</inf> the most contributive species to the light extinction coefficient were ammonium sulfate, ammonium nitrate, and organic species, which accounted for 80.6%. Although the light extinction contribution of organic matter was as high as 43.51% on a clear day (VR&gt;10 km), with the decrease of visibility, the extinction contribution of organic matter decreased, but the contribution of secondary inorganic salt increased. The contribution of extinction was 58.96% for heavy haze days with low visibility (VR&lt;5 km). This proves that the secondary inorganic salt extinction plays a significant role in visibility impairment.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Visibility
Controlled terms:Aerosols - Biogeochemistry - Biological materials - Chemical analysis - Degradation - Light extinction - Nitrogen compounds - Organic compounds - Sulfur compounds
Uncontrolled terms:Aerosol chemical composition - Chemical compositions - Fine particles - Inorganic salts - Light extinction coefficients - Seasonal variation - Visibility degradation - Visibility impairment
Classification code:461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 741.1  Light/Optics - 741.2  Vision - 802.2  Chemical Reactions - 804.1  Organic Compounds
Numerical data indexing:Percentage 4.35e+01%, Percentage 5.90e+01%, Percentage 8.06e+01%, Size 2.10e-06m
DOI:10.13227/j.hjkx.201707171

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 154>

Accession number:20183905856747
Title:Spatio-Temporal Patterns and Environmental Risk of Endocrine Disrupting Chemicals in the Liuxi River
Authors:Fan, Jing-Jing (1, 2); Wang, Sai (1, 2); Tang, Jin-Peng (1, 2); Dai, Yu-N&uuml; (1, 2); Wang, Lin (1, 2); Long, Sheng-Xing (1, 2); He, Wen-Xiang (3); Liu, Shuai-Lei (1, 2); Wang, Jia-Xi (1, 2); Yang, Yang (1, 2) 
Author affiliation:(1) Research Center of Hydrobiology, College of Life Science and Technology, Jinan University, Guangzhou; 510632, China; (2) Engineering Research Center of Tropic and Subtropic Aquatic Ecological Engineering, Ministry of Education, Guangzhou; 510632, China; (3) Central Station of Environmental Monitoring, Guangzhou; 510030, China 
Corresponding author:Yang, Yang(yangyang@scies.org)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1053-1064
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study aimed to investigate the occurrence and spatio-temporal distribution of 4-tert-octylphenol (4-t-OP), 4-nonylphenol (4-NP), triclosan (TCS), estrone (E1), 17&beta;-estradiol (E2), and bisphenol-A (BPA) as endocrine disrupting chemicals (EDCs) in the water of the Liuxi River and to evaluate the risks for estrogenic activity. The results showed that EDCs had been detected at the 14 monitoring sites and the total concentration ranged from 26.07 ng&bull;L<sup>-1</sup> to 7109.5 ng&bull;L<sup>-1</sup>, with the highest contribution rate coming from 4-NP (78.62%), followed by BPA (11.91%), and the other four EDCs (&le;4.92%). On a spatial and temporal scale, the EDC contents increased longitudinally from upstream to downstream, especially in the heavily-polluted Baiyun section where the water quality was lower than level &#8548;. The EDC contents in the tributaries were much higher than those in the main channels. Influenced by the monsoon precipitation, the contents of 4-NP, 4-t-OP, and total EDCs in the rainy season were significantly (P&lt;0.05) higher than those in the dry season, while the seasonal changes of E1 and E2 followed the opposite tendency. A Pearson correlation analysis showed that DO was significantly negatively correlated with all the EDCs, suggesting that the EDCs and reductive organic pollutants might coexist. As TN, TP, NH<inf>4</inf><sup>+</sup>-N, permanganate index, and EC were significantly positively correlated with E1, E2, BPA, and TCS but not obviously correlated with 4-NP (P&gt;0.05), we presumed that the pollution source of E1, E2, BPA, and TCS might be the same with nitrogen and phosphorus nutrition, originating from the point source emission of the domestic sewage, industrial, and agricultural wastewater. In contrast, 4-NP and 4-t-OP more likely originated from the non-point source pollution from agriculture. RDA results showed that the variation of the EDCs contents by season was more obvious than that in space (RDA1 56.14%&gt;RDA2 14.20%), which was much more influenced by 4-NP in the rainy season and by BPA in the dry season. As E1, E2, and TCS were positively correlated with the Cu, Zn, cyanide, and fecal coliform, these three target compounds could be used to indicate the multiple pollution components for water quality. Compared with the worldwide reported EDC contents in waters, 4-NP, BPA, and TCS contents in the middle and lower reaches of the Liuxi River were at higher levels, while E1, E2, and 4-t-OP were at the middle and lower levels. The risk assessment for estrogenic activity showed that the RQ values in the middle and lower reaches of the Liuxi River were all greater than 1, indicating that the downstream river sections were under high risk for estrogenic activity. As a result, appropriate precautions are needed to improve environmental management.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:Rivers
Controlled terms:Agriculture - Chemicals - Correlation methods - Drought - Endocrine disrupters - Endocrinology - Environmental management - Industrial emissions - Organic pollutants - Risk assessment  - River pollution - Sewage - Water quality
Uncontrolled terms:Agricultural wastewater - Endocrine disrupting chemicals - Estrogenic activities - Non-point source pollution - Pearson correlation analysis - Source analysis - Spatiotemporal distributions - Spatiotemporal patterns
Classification code:444  Water Resources - 445.2  Water Analysis - 451.1  Air Pollution Sources - 452.1  Sewage - 453  Water Pollution - 454.1  Environmental Engineering, General - 461.6  Medicine and Pharmacology - 461.7  Health Care - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Mass_Density 2.61e-08kg/m3 to 7.11e-06kg/m3, Percentage 1.19e+01%, Percentage 1.42e+01%, Percentage 7.86e+01%
DOI:10.13227/j.hjkx.201708145

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 155>

Accession number:20183905856508
Title:Effects of Tetracycline Antibiotics on Growth and Characteristics of Enrichment and Transformation in Two Vegetables
Authors:Chi, Sun-Lin (1); Wang, Wei-Zhong (1); Xu, Wei-Hong (1); Li, Tao (1); Li, Yan-Hua (1); Zhang, Chun-Lai (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:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:935-943
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Pot experiments were carried out to study different levels (0, 50, and 150 mg&bull;kg<sup>-1</sup>) of three tetracycline antibiotics [tetracycline (TC), oxytetracycline (OTC), and chlortetracycline (CTC)] on the growth, concentration of tetracycline antibiotics, and their characteristics of enrichment and transformation in two kinds of vegetables (lettuce and Chinese cabbage). The results showed that the fresh weight of shoots and roots of lettuce decreased by 1.56%-26.84% and 17.36%-51.04%, respectively, when exposed to tetracycline antibiotics compared to the control, while the fresh weight of shoots and roots of Chinese cabbage increased by 3.7%-7.3% and 3.1%-82.2%, respectively. The stomatal conductance (G<inf>s</inf>) and transpiration rate (T<inf>r</inf>) of lettuce and cabbage increased when exposed to tetracycline antibiotics, while the net photosynthetic rate (P<inf>n</inf>) of lettuce decreased by 32.43%-82.43% at 150 mg&bull;kg<sup>-1</sup> of TC compared to the control. Compared to the control, the activities of SOD in lettuce and cabbage decreased 29.17%-223.12% when exposed to tetracycline antibiotics, and the lowest activities of SOD in lettuce and cabbage were found in OTC treatments. The highest content of MDA in lettuce and cabbage was observed at 150 mg&bull;kg<sup>-1</sup> of TC (except for lettuce leaves). The contents of tetracycline antibiotics in the shoots and underground portions of Chinese cabbage were higher than that of lettuce, and higher contents of tetracycline antibiotics in vegetables were found with the CTC treatments. The residual amount of antibiotics in lettuce soil was higher than that in the Chinese cabbage soil, and the highest residual amount in the soil was observed with the OTC treatment. The bioconcentration factors (BCF) and transport factor (TF) of Chinese cabbage were, respectively, 1.07-7.35 and 1.15-2.25 times that of lettuce. OTC and CTC were more easily concentrated in the two vegetables. Therefore, OTC and CTC may bring a higher ecological risk.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Antibiotics
Controlled terms:Bioaccumulation - Enzyme activity - Photosynthesis - Soils - Temperature control - Vegetables
Uncontrolled terms:Antioxidant enzyme activity - Bioconcentration factor - Characteristics of enrichment and transformation - Net photosynthetic rate - Oxytetracyclines (OTC) - Stomatal conductance - Tetracycline antibiotics - Transpiration rates
Classification code:461.6  Medicine and Pharmacology - 461.9  Biology - 483.1  Soils and Soil Mechanics - 731.3  Specific Variables Control - 741.1  Light/Optics - 821.4  Agricultural Products
Numerical data indexing:Percentage 1.56e+00% to 2.68e+01%, Percentage 1.74e+01% to 5.10e+01%, Percentage 2.92e+01% to 2.23e+02%, Percentage 3.10e+00% to 8.22e+01%, Percentage 3.24e+01% to 8.24e+01%, Percentage 3.70e+00% to 7.30e+00%
DOI:10.13227/j.hjkx.201706250

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 156>

Accession number:20183905856784
Title:Oxytetracycline Wastewater Treatment in Microbial Fuel Cells and the Analysis of Microbial Communities
Authors:Yan, Wei-Fu (1, 2); Xiao, Yong (1); Wang, Shu-Hua (1, 2); Ding, Rui (1, 2); Zhao, Feng (1) 
Author affiliation:(1) Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Xiao, Yong(yxiao@iue.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1379-1385
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Oxytetracycline (OTC) as an important broad spectrum antibiotic has been widely used in animal husbandry. However, the abuse of OTC not only has a direct adverse impact on ecosystems, but also exacerbates the appearance of antibiotic resistance bacteria and antibiotic resistance genes. OTC-containing wastewater was treated using microbial fuel cells (MFCs), and the removal efficiency of OTC in MFCs in different operation periods was investigated. Result showed that the removal efficiency of 10 mg&bull;L<sup>-1</sup> OTC by MFCs within 132 h was up to 99.0% after 150 d of operation. The bacterial communities in raw pig mature and anodic biofilms were studied by high-throughput sequencing. This showed that Firmicutes were both dominant on phylum a level; However, compared to the raw pig mature, the abundance of Proteobacteria greatly increased from 2.84% to 8.92%-22.75% in the anodic biofilm. In addition, the abundance of Eubacterium spp. in the anodic biofilm increased obviously from nearly 0.00% to 20.49%-49.00%. It has been reported that some Eubacterium spp. were able to biodegrade oxygen heterocyclic aromatic compounds contained in OTC. Therefore, Eubacterium spp. is suggested as potential functional species in the biodegradation of OTC and/or its metabolites. This work proves the feasibility and effectiveness of removing OTC-containing wastewater by using MFCs.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Microbial fuel cells
Controlled terms:Antibiotics - Bacteria - Biodegradation - Biofilms - Efficiency - Throughput - Wastewater treatment
Uncontrolled terms:Antibiotic resistance - Antibiotic resistance bacteria - Antibiotic resistance genes - Heterocyclic aromatic compounds - High-throughput sequencing - Microbial communities - Microbial fuel cells (MFCs) - Oxytetracyclines (OTC)
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461.6  Medicine and Pharmacology - 461.8  Biotechnology - 462.5  Biomaterials (including synthetics) - 913.1  Production Engineering
Numerical data indexing:Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 2.05e+01% to 4.90e+01%, Percentage 8.92e+00% to 2.28e+01%, Percentage 9.90e+01%, Time 4.75e+05s
DOI:10.13227/j.hjkx.201708189

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 157>

Accession number:20183905856785
Title:Spatial and Temporal Variability of Soil C-to-N Ratio of Yugan County and Its Influencing Factors in the Past 30 Years
Authors:Jiang, Ye-Feng (1, 2); Zhong, Shan (1, 2); Li, Jie (1, 2); Wang, Lan-Ke (1, 2); Guo, Xi (1, 2) 
Author affiliation:(1) Academy of Land Resource and Environment, Jiangxi Agricultural University, Nanchang; 330045, China; (2) Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang; 330045, China 
Corresponding author:Guo, Xi(xig435@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1386-1395
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The soil carbon-to-nitrogen (C/N) ratio of soils is a sensitive indicator of soil quality and an indicator for assessing the carbon and nitrogen nutrition balance of soils. Its variation is significant in reflecting the carbon and nitrogen cycling of soils. An accurate knowledge of how the C/N ratio varies spatially and temporally and the driving factors at county scale is of great significance to the extrapolation of balanced fertilization based on soil C/N ratio regulation as well as to the protection of the ecological environment. This study was based on 200 points of surface soil samples (0-20 cm) collected during the second National Soil Survey in 1982 and 423 points of surface soil samples (0-20 cm) collected during the soil test-based formulated fertilization project in 2012 in Yugan County. Combined with the soil parent material, soil type, farmland-use type, terrain factors, pH, straw incorporation pattern, and nitrogen fertilizer rate over the past 30 years, spatial and temporal variability characteristics of the soil C/N ratio were analyzed by using ordinary kriging methods, and the effects of the influencing factors were quantified by regression analysis. The results indicated that the mean value of the C/N ratio was 10.05 and 11.18 in 1982 and 2012, respectively. The coefficient of variation was 19.40% and 25.04%, respectively, which suggested the soil C/N ratio had moderate variability in the study area. The ratios of nugget to sill were 15.91% and 71.25% in 1982 and 2012, respectively. This means that the leading factor from the structural factors (parent material and soil type) into the stochastic factors (nitrogen fertilizer rate and straw incorporation pattern). In the past 30 years, most of the regional soil C/N ratio increased significantly especially the eastern region. The spatial variability of soil C/N in 1982 was mainly affected by soil parent material, soil type, terrain factor, and pH, with the degree of influence of each variable at 17.3%, 14.2%, 7.4%, and 2.3%. In 2012, the spatial variability was mainly affected by soil parent material, soil type, farmland-use type, terrain factor, straw incorporation pattern, and nitrogen fertilizer rate, with the degree of influence of each variable of 8.7%, 23.5% 28.2%, 12.2%, 12.6%, and 42.3%, respectively. To maintain the steady growth of the soil C/N ratio, it is suggested that the return of carbon be incorporated with the input of nitrogen, such as incorporating crop residues into the soil and inputting more organic fertilizers into the soil in future farming practices.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:Soils
Controlled terms:Agricultural wastes - Carbon - Farms - Landforms - Nitrogen fertilizers - Regression analysis - Soil surveys - Soil testing - Stochastic systems
Uncontrolled terms:Nitrogen fertilizer rate - Parent materials - Soil carbon - Spatial and temporal variability - Yugan County
Classification code:481.1  Geology - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 821.5  Agricultural Wastes - 922.2  Mathematical Statistics - 961  Systems Science
Numerical data indexing:Age 3.00e+01yr, Percentage 1.22e+01%, Percentage 1.26e+01%, Percentage 1.42e+01%, Percentage 1.59e+01%, Percentage 1.73e+01%, Percentage 1.94e+01%, Percentage 2.30e+00%, Percentage 2.50e+01%, Percentage 2.82e+01%, Percentage 4.23e+01%, Percentage 7.12e+01%, Percentage 7.40e+00%, Percentage 8.70e+00%, Size 0.00e+00m to 2.00e-01m
DOI:10.13227/j.hjkx.201706186

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 158>

Accession number:20183905856843
Title:Assessment of Heavy Metal Pollution and Human Health Risk of Surface Waters in the City of Ningbo, China
Authors:Xu, Mei-Juan (1); Bao, Bo (2); Chen, Chun-Yan (2); Wang, Yong-Chuan (1); Gao, Fu-Yan (1); Yu, Xiao-Yi (1) 
Author affiliation:(1) College of Mechanical and Energy Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo; 315100, China; (2) Cixi Environmental Protection Monitoring Station, Cixi; 315300, China 
Corresponding author:Yu, Xiao-Yi(yuxiaoyi@nit.zju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:729-737
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to evaluate the present situation and the potential ecological risk of heavy metal pollution in the surface waters of eastern Chinese coastal cities, the city of Ningbo was used as an example. From surface waters in Ningbo, 255 water samples were collected. The concentrations of six heavy metals (Cd, Cr, Cu, Ni, Pb, and Zn) were measured for the samples. The potential ecological risk of these heavy metals was evaluated by calculating health risk and cancer risk indices. The results indicate that, in the surface waters of Ningbo, the average concentrations of the six heavy metals were in the increasing order of Zn&gt;Pb&gt;Cr&gt;Ni&gt;Cd&gt;Cu. Three of the heavy metal concentrations exceeded the national environmental quality standards for surface water (GB 3838-2002, grade &#8548;), and the order of exceeding the standard: Cd&gt;Pb&gt;Cr. Electroplating wastewater, metal waste produced, traffic pollutant, dyes, and coatings waste were the main pollutant sources. There were some potential health risks in over 70 percent of the surface waters in Ningbo, and the surface waters of the Zhenhai and Haishu districts had the highest potential health risk. There were three major potential health risk heavy metals, and their order of increasing risk was Cd&gt;Cr&gt;Pb. For adults and juveniles, the average carcinogenic risk indices were 17 600 and 24 800 times the critical values, respectively. Moreover, over 95 percent of the risks were attributed to Cr. The potential carcinogenic risk index of commercial areas with dense population was nearly 2 times that of the city average. The results indicated that the state of heavy metal pollution in the surface waters of Ningbo was very serious, thus the government should pay more attention to this issue.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Health risks
Controlled terms:Health - Heavy metals - Risk assessment - River pollution - Surface waters
Uncontrolled terms:Carcinogenic risk - Coastal cities - Electroplating wastewater - Environmental quality standards - Heavy metal concentration - Ningbo - Potential ecological risk - Potential health risks
Classification code:444.1  Surface Water - 453  Water Pollution - 461.6  Medicine and Pharmacology - 461.7  Health Care - 531  Metallurgy and Metallography - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 7.00e+01%, Percentage 9.50e+01%
DOI:10.13227/j.hjkx.201705251

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 159>

Accession number:20183905856749
Title:Identification of Nitrate Sources and the Fate of Nitrate in Downstream Areas: A Case Study in the Taizi River Basin
Authors:Li, Yan-Li (1); Yang, Zi-Rui (1); Yin, Xi-Jie (2); Sun, Wei (1) 
Author affiliation:(1) Institute of Resources and Environment, Henan Polytechnic University, Jiaozuo; 454000, China; (2) Open Laboratory of Ocean &amp; Coast Environmental Geology, Third Institute of Oceanography State Administration, Xiamen; 361005, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1076-1084
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A total of 14 samples were collected in May 2016(dry season)and August 2016 (wet season) in the downstream area of the Taizi River. &delta;<sup>15</sup>N-NO<inf>3</inf><sup>-</sup> and &delta;<sup>18</sup>O-NO<inf>3</inf><sup>-</sup> were determined using the azide method, and &delta;<sup>18</sup>O-H<inf>2</inf>O was determined using a CO<inf>2</inf>-H<inf>2</inf>O equilibration technique. To identify NO<inf>3</inf><sup>-</sup> sources and transformations in the downstream area of Taizi River Basin, ion chromatography, Nessler's reagent spectrophotometry, the azide method, and CO<inf>2</inf>-H<inf>2</inf>O equilibration methods were utilized to determine the concentrations of NO<inf>3</inf><sup>-</sup>, Cl<sup>-</sup>, NH<inf>4</inf><sup>+</sup>-N, and isotopic compositions (&delta;<sup>15</sup>N and &delta;<sup>18</sup>O) of NO<inf>3</inf><sup>-</sup> and the &delta;<sup>18</sup>O-H<inf>2</inf>O in surface water. The results showed that the NO<inf>3</inf><sup>-</sup> was mainly derived from mixed sources. During the dry season, the nitrate in the surface water was derived from soil nitrogen, manure, and sewage in the upper reaches, and mainly derived from synthetic fertilizer, manure, and sewage in the middle and lower reaches of the Beisha River. The nitrate was mainly derived from manure and sewage in the Nansha River. The nitrate was mainly derived from soil nitrogen in the upper reaches, mainly derived from synthetic fertilizer, manure, and sewage in the middle reaches, and mainly derived from manure and sewage in the lower reaches of the Haicheng River. During the wet season, the nitrate sources in surface water were soil nitrogen, synthetic fertilizer, manure, and sewage in the Beisha River; synthetic fertilizer, manure, and sewage in the middle and lower reaches of the Haicheng River and the Nansha River; and soil nitrogen and synthetic fertilizer in the upper reaches of the Haicheng River. NO<inf>3</inf><sup>-</sup> and NH<inf>4</inf><sup>+</sup>-N concentrations decreased with increasing &delta;<sup>15</sup>N-NO<inf>3</inf><sup>-</sup> from the dry season to the wet season, indicating that volatilization of NH<inf>4</inf><sup>+</sup>-N and denitrification of NO<inf>3</inf><sup>-</sup> might occur during the wet season. There is a slightly positive relationship between the reciprocal of the concentration of 1/&rho;(NO<inf>3</inf><sup>-</sup>) and &delta;<sup>15</sup>N-NO<inf>3</inf><sup>-</sup> during the wet season, indicating that mixing processes occurred in surface water. The results will provide information on nitrate sources during seasonal variations in the plain areas.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:River pollution
Controlled terms:Carbon dioxide - Chlorine compounds - Drought - Ion chromatography - Manures - Nitrates - Nitrogen fertilizers - Rivers - Sewage - Soils  - Watersheds
Uncontrolled terms:Chloride - Downstream areas - Equilibration techniques - Isotopic composition - Nessler's reagents - Pollution sources - Seasonal variation - Synthetic fertilizers
Classification code:444  Water Resources - 444.1  Surface Water - 452.1  Sewage - 453  Water Pollution - 483.1  Soils and Soil Mechanics - 801  Chemistry - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 821.5  Agricultural Wastes
DOI:10.13227/j.hjkx.201705248

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 160>

Accession number:20183905856510
Title:Liver and Kidney Function of E-waste Dismantling Workers and Potential Influencing Factors
Authors:Yan, Xiao (1); Li, Shu-Yuan (1); Wang, Mei-Huan (1); Xu, Rong-Fa (1); Zheng, Jing (1); Ren, Ming-Zhong (1) 
Author affiliation:(1) State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Guangzhou; 510655, China 
Corresponding author:Ren, Ming-Zhong(renmingzhong@scies.org)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:953-960
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:High levels of exposure to heavy metals and persistent organic pollutants (POPs) by e-waste dismantling workers has attracted increasing attention, but the health conditions of the workers are seldom reported. The liver and kidney functions of the workers were studied by comparing the blood indicators of the worker group with those of the control group. Moreover, factors affecting the liver and kidney functions, such as the sexuality, age, and working time, were identified using correlation analysis. The ratio of aspartate transaminase and alanine aminotransferase (AST/ALT) and the direct bilirubin (DBIL) of the workers were significantly lower than the control group but the abnormal rate of liver and kidney remained the same in both groups. The abnormal rates of liver and kidney were higher in men than in women. ALT, AST/ALT, and urea nitrogen (BUN) increased with age while creatinine (CREA) increased with working time. The factors of liver and kidney damage caused by POPs and DBIL can be used as the indicators of the damage caused by multi-factors.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:53
Main heading:Organic pollutants
Controlled terms:Amino acids - Electronic Waste - Heavy metals - Industrial poisons - Urea - Wastes
Uncontrolled terms:Alanine aminotransferase - Control groups - Correlation analysis - Health condition - Kidney function - Liver functions - Persistent organic pollutants - Urea nitrogen
Classification code:531  Metallurgy and Metallography - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201708101

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 161>

Accession number:20183905856826
Title:Indoor Formaldehyde and Benzene Series in Shanghai Residences and Their Associations with Building Characteristics and Lifestyle Behaviors
Authors:Jiang, Qiao-Yun (1); Liu, Ping-Ping (1); Wang, Xue-Ying (1); Lu, Rong-Chun (1); Liu, Wei (1); Zhou, Hua-Yuan (1); Gong, Ying-Ying (1); Zhou, Ya-Xin (1); Huang, Chen (1) 
Author affiliation:(1) School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai; 200093, China 
Corresponding author:Huang, Chen(hcyhyywj@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:585-591
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:From March 2013 to December 2014, we on-site inspected indoor concentrations of formaldehyde and a benzene series in 454 children's bedrooms that were decorated earlier than one year before our inspection. Large differences existed in the formaldehyde and benzene-series concentrations among individual bedrooms. Bedrooms that were inspected in winter had significantly higher concentration of formaldehyde than bedrooms that were inspected in other seasons (P&lt;0.001), but the benzene-series concentration had no significant seasonal difference. Among bedrooms that were inspected in spring, those using different materials as wall coverings had significant differences in concentrations of the benzene series. Among bedrooms that were inspected in summer, those using different materials as floor coverings had significant differences in concentrations of the benzene series (P&lt;0.01). Among bedrooms that were inspected in autumn, those with&gt;5 household bonsais had significantly higher concentrations of formaldehyde than other bedrooms did. Among bedrooms that were inspected in winter, those with frequent use of air humidifiers and those in which pets were kept had significantly higher concentrations of the benzene series than other bedrooms did (P&lt;0.05). These results indicate that, after a long time since decoration, the types of household wall and floor covering materials still have certain relationships with indoor benzene-series levels and, compared to decoration materials, household ventilation perhaps has greater effect on indoor formaldehyde levels. The indoor benzene-series level perhaps has associations with indoor humidity level and the keeping of pets in households. Household bonsaies may have limited effect on indoor formaldehyde and benzene-series levels in residences that were decorated a long time ago.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Benzene
Controlled terms:Floors - Formaldehyde - Inspection - Volatile organic compounds - Walls (structural partitions)
Uncontrolled terms:Building characteristics - Child's bedroom - Indoor concentration - Indoor humidities - Lifestyle behaviors - Seasonal differences - Shanghai - Wall coverings
Classification code:402  Buildings and Towers - 408.2  Structural Members and Shapes - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201703144

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 162>

Accession number:20183905856819
Title:Characteristics of VOCs Pollution in the Winter Atmosphere of a Typical Petrochemical Industry Park
Authors:Mao, Yao (1, 2); Li, Gang (3); Hu, Tian-Peng (2); Zheng, Huang (2); An, Yi-Wei (1); Min, Yang (1); Xing, Xin-Li (2); Qi, Shi-Hua (1, 2) 
Author affiliation:(1) State Key Laboratory of Biogeology and Environmental Geology, China University of Geoscience, Wuhan; 430074, China; (2) School of Environmental Studies, China University of Geoscience, Wuhan; 430074, China; (3) Karamay Environmental Monitoring Center Station, Karamay; 834000, China 
Corresponding author:Qi, Shi-Hua(shihuaqi@cug.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:525-532
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Concentrations of volatile organic compounds (VOCs) in ambient air of a typical petrochemical industry park were measured using an on-line monitor (TH-300B) from December 2014 to February 2015. The composition, temporal variations, sources, and photochemical reactivity of VOCs were analyzed. Alkanes were the most abundant VOC species and contributed to 86.73% to total VOC concentrations in winter. Concentrations of TVOCs, alkanes, alkenes, and aromatic hydrocarbons were high at night and low during the day. The changes in alkane and alkene concentrations were consistent with those in TVOC concentrations. Using principal component analysis and multiple linear regression (PCA - MLR) in combination, five sources of VOCs were identified; fuel evaporation, industrial emissions, a mix of gasoline vehicle exhaust and plant emissions, diesel vehicle exhaust emissions, and fuel combustion with contributions of 60.02%, 8.50%, 2.07%, 12.21%, and 17.20%, respectively. Propylene-equivalent concentration (Propy-Equiv) and maximum incremental reactivity (MIR) method were used to calculate the contributions of VOCs measured in the study area to ozone production. Alkanes contributed most to ozone production followed by alkenes and aromatic hydrocarbons. The contribution rate of cyclopentane, n-butane, and 1-pentene were higher owing to their long photochemical age in the study area.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Principal component analysis
Controlled terms:Air pollution - Aromatic hydrocarbons - Fuels - Industrial emissions - Linear regression - Mineral oils - Ozone - Paraffins - Petrochemicals - Volatile organic compounds
Uncontrolled terms:Composition characteristics - Petrochemical industry - Reaction activity - Source apportionment - Variation characteristics
Classification code:451  Air Pollution - 451.1  Air Pollution Sources - 513.3  Petroleum Products - 804  Chemical Products Generally - 804.1  Organic Compounds - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.22e+01%, Percentage 1.72e+01%, Percentage 2.07e+00%, Percentage 6.00e+01%, Percentage 8.50e+00%
DOI:10.13227/j.hjkx.201707049

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 163>

Accession number:20183905856781
Title:Effects of Phosphorus on the Activity and Bacterial Community in Mixotrophic Denitrification Sludge
Authors:Wang, Pei-Qi (1); Zhou, Wei-Li (1); He, Sheng-Bing (1); Huang, Jung-Chen (1) 
Author affiliation:(1) School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China 
Corresponding author:Zhou, Wei-Li(weilizhou@sjtu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1350-1356
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Biological denitrification is now one of the most widely applied techniques to remove nitrogen from the aquatic environment, and mixotrophic denitrification has gained attention as it takes the characteristics of both heterotrophic and autotrophic denitrification. This study investigated the biological denitrification efficiency and the bacterial community structure of sludge sampled from a mixotrophic denitrification reactor, before and after adding a certain amount of phosphate. The results showed that the bacteria have the capability of denitrification even without phosphorus, but the addition of phosphorus could significantly improve the biomass and the denitrification activity. After phosphate was added, the autotrophic and heterotrophic denitrification activity increased to 0.056 mg&bull;(L&bull;min&bull;g)<sup>-1</sup> and 0.232 mg&bull;(L&bull;min&bull;g)<sup>-1</sup> on N/VSS, which was 2.9 and 3.9 times that of the sludge activity before phosphorus addition, respectively. The bacterial community structure illustrated that the denitrifiers increased remarkably from 13.47% to 44.82% and that the dominate bacteria have also changed. Meanwhile, the growth of autotrophic, heterotrophic, and mixtrophic bacteria were all improved significantly after phosphorus was added.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Bacteria
Controlled terms:Biodiversity - Biological filter beds - Denitrification - Phosphorus
Uncontrolled terms:Autotrophic denitrification - Bacterial community structure - Biological denitrification - Community structures - Heterotrophic denitrification - Inorganic phosphorus - Mixotrophic denitrifications - Sludge activity
Classification code:454  Environmental Engineering - 461.8  Biotechnology - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.35e+01% to 4.48e+01%
DOI:10.13227/j.hjkx.201706265

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 164>

Accession number:20183905856860
Title:Effect of Aerobic/Phosphorus Granules on Start-up of Partial Nitrification Granular Sludge
Authors:Li, Dong (1); Guo, Yue-Zhou (1); Cao, Mei-Zhong (1); Zhang, Ze-Wen (1); Li, Shuai (2); 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:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:872-879
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The different effects of additional aerobic granules (AGs) and phosphorus removal granules (PRGs) on the start-up and stable operation of partial nitrification granular sludge (PNGS) were compared at room temperature(22-28&#8451;). The results showed that in the first stage (days 0-22), partial nitrification was accomplished on day 19 for the three reactors (R1, R2, and R3). In the second stage (days 23-56), 20% AGs and 20% PRGs were added to R2 and R3 to induce PNGS. The start-up of the granules of the three reactors was successfully achieved. The mean particle sizes of R1, R2, and R3 reached 412 &mu;m at day 76, 468 &mu;m at day 42, and 400 &mu;m at day 56. In the third stage (days 57-108), because the influent ammonia load increased from 0.4 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> to 0.5 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> and the COD load increased from 0.2 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> to 0.5 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>, the mean particle sizes of R1 and R2 increased significantly. The average particle sizes of R1 and R2 reached 689 &mu;m and 893 &mu;m by the end of the operation (day 108), but sludge expansion occurred in R3. The inoculation of either AGs or PRGs could quickly achieve granulation, but the PNGS inoculated with the AGs could adapt to higher C/N and be more tolerable to shock loads and long-term stable operation.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:Granulation
Controlled terms:Ammonia - Granular materials - Nitrification - Nitrogen removal - Particle size
Uncontrolled terms:Aerobic granules - Ammonia nitrogen - Average particle size - Different effects - Granular sludge - Mean particle size - Partial nitrification - Phosphorus removal
Classification code:802.2  Chemical Reactions - 802.3  Chemical Operations - 804.2  Inorganic Compounds - 951  Materials Science
Numerical data indexing:Percentage 2.00e+01%, Size 4.00e-04m, Size 4.12e-04m, Size 4.68e-04m, Size 6.89e-04m, Size 8.93e-04m
DOI:10.13227/j.hjkx.201707099

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 165>

Accession number:20183905856780
Title:Analysis of Low C/N Wastewater Treatment and Structure by the CEM-UF Combined Membrane-Nitrification/Denitrification System
Authors:Xing, Jin-Liang (1, 2); Zhang, Yan (1); Chen, Chang-Ming (1); Zhang, Bo-Kang (1); Guo, Wei (1); Ma, Xiang-Shan (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) China Metallurgical Industry Panning and Research Institute, Beijing; 100711, China 
Corresponding author:Zhang, Yan(yzhang@bjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1342-1349
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this study, a CEM-UF composite membrane with ammonia nitrogen enrichment and separation characteristics was combined with nitrification/denitrification to treat low C/N wastewater. The denitrification characteristics of low C/N wastewater at different flow ratios were investigated, and the structural characteristics of functional microbial communities in nitrifying and denitrifying activated sludge were analyzed by 16Sr DNA high-throughput sequencing. The results showed that influent TN was 60 mg&bull;L<sup>-1</sup>, COD/TN was 2.65, the nitrification effect of each flow rate was good, and the average ammonia nitrogen removal rate was 98.7%. When the flow ratio increased from 1:2 to 1:6, the m(COD)/m(NO<inf>3</inf><sup>-</sup>-N) of denitrification was increased, and the removal of average nitrate nitrogen reached its highest level at 1:6, which was 86.28%, and the removal of total nitrogen increased from 22.56% to 46.8%. An analysis of Illumina sequencing showed that nitrogen fixing bacteria Proteobacteria accounted for 30.9%, and the important nitrite oxidizing bacteria, Nitrospirae, accounted for 3.06%. At the genus level, Nitrosomonas and Nitrosospira, belonging to the ammonia oxidizing bacteria (AOB) category and Nitrospira and Nitrobacter, belonging to the nitrite oxidizing bacteria (NOB) category were detected. The ratio of AOB and NOB bacteria was high, which is consistent with good nitrification in the nitrification reactor. The dominant bacteria in denitrification sludge were Proteobacteria (53.13%), followed by Bacteroidetes (10.93%). A variety of bacteria related to denitrification were detected at the genus level, such as Dechloromonas, Thauera, Castellaniella, Alicycliphilus, Azospira, Comamonas, Caldilinea, and Saccharibacteria. The proportion of denitrifying bacteria was 25.91% as denitrifying bacteria microbial species were rich in the denitrifying sludge, giving a good denitrification effect.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Bacteria
Controlled terms:Ammonia - Composite membranes - Computational electromagnetics - Denitrification - Gene encoding - Nitrification - Nitrogen fixation - Nitrogen removal - Throughput - Wastewater treatment
Uncontrolled terms:Ammonia oxidizing bacteria - Flow ratios - High-throughput sequencing - N enrichments - Nitrification/denitrification - Nitrite-oxidizing bacteria - Separation characteristics - Structural characteristics
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461.9  Biology - 701  Electricity and Magnetism - 802.2  Chemical Reactions - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 6.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 1.09e+01%, Percentage 2.26e+01% to 4.68e+01%, Percentage 2.59e+01%, Percentage 3.06e+00%, Percentage 3.09e+01%, Percentage 5.31e+01%, Percentage 8.63e+01%, Percentage 9.87e+01%
DOI:10.13227/j.hjkx.201707018

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 166>

Accession number:20183905856832
Title:Treatment of the Waste Gas Containing Methyl tert-Butyl Ether via a Biotrickling Filter
Authors:Chu, Qi-Ying (1); Yao, Lu-Lu (1); L&uuml;, Xiong-Biao (2); Ye, Jie-Xu (1); Ye, Hong-Ni (1); Pan, Liang-Zhu (1); Chen, Jian-Meng (1); Chen, Dong-Zhi (1) 
Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310032, China; (2) Feierte Environmental Engineering Company Limited of Zhejiang Province, Hangzhou; 310014, China 
Corresponding author:Chen, Dong-Zhi(cdz@zjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:633-639
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The performance and microbial communities of methyl tert-butyl ether (MTBE) treatment using a biotrickling filter (BTF) that was inoculated with activated sewage sludge were investigated. The BTF successfully started up within 23 days when the inlet concentration of MTBE was 100 mg&bull;m<sup>-3</sup> and empty bed retention time was 60 s, with 70% removal efficiency (RE). Under steady-state conditions, an elimination capacity (EC) and a mineralization ratio of 13.47 g&bull;(m<sup>3</sup>&bull;h)<sup>-1</sup> and 68% were achieved, respectively. The EC<inf>max</inf> was 21.03 g&bull;(m<sup>3</sup>&bull;h)<sup>-1</sup> according to the Haldane model, and a K<inf>S</inf> of 0.16 g&bull;m<sup>-3</sup> and K<inf>I</inf> of 0.99 g&bull;m<sup>-3</sup> were obtained. High-throughput sequencing was used to identify the community structure of the mixed microbial consortium in the BTF. The results indicated that Methylibium sp. (11.33%) and Blastocatella sp. (9.95%) were the dominant bacteria.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Waste treatment
Controlled terms:Biofilters - Ethers - Filtration - Kinetics - Sewage sludge
Uncontrolled terms:Bio-trickling filters - Elimination capacity - Empty bed retention time - High-throughput sequencing - Methyl tert butyl ether - Microbial communities - Mixed microbial consortium - Steady-state condition
Classification code:452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 802.3  Chemical Operations - 804.1  Organic Compounds - 931  Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Percentage 1.13e+01%, Percentage 6.80e+01%, Percentage 7.00e+01%, Percentage 9.95e+00%, Age 6.30e-02yr
DOI:10.13227/j.hjkx.201703066

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 167>

Accession number:20183905856736
Title:Characterization and Variation of Organic Carbon (OC) and Elemental Carbon (EC) in PM<inf>2.5</inf> During the Winter in the Yangtze River Delta Region, China
Authors:Kang, Hui (1); Zhu, Bin (1); Wang, Hong-Lei (1); Shi, Shuang-Shuang (1) 
Author affiliation:(1) Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China 
Corresponding author:Zhu, Bin(binzhu@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:961-971
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Two hundred seventy-nine PM<inf>2.5</inf> samples were collected from January 9, 2015 to January 31, 2015 in Lin'an, Nanjing, and Suzhou. They were analyzed for organic carbon (OC) and elemental carbon (EC) following the thermal/optical reflection protocol. The pollution characteristics of OC and EC in PM<inf>2.5</inf> during the winter in the Yangtze River Delta were discussed in detail.The average mass concentrations of PM<inf>2.5</inf> in the three sample sites were (123.56&plusmn;61.11), (144.77&plusmn;62.91), and (156.5&plusmn;68.97) &mu;g&bull;m<sup>-3</sup>, respectively, which were in excess of the Ambient Air Quality Standard (GB 3095-2012) 24-hr mass-based standard of 75 &mu;g&bull;m<sup>-3</sup>. The average mass concentration of OC and EC were (21.93&plusmn;11.69)/(6&plusmn;3.6), (20.32&plusmn;10.3)/(5.39&plusmn;3.07), and (27.08&plusmn;14.35)/(6.4&plusmn;4.29) &mu;g&bull;m<sup>-3</sup>, respectively. Lin'an, which is regarded as the background site for the atmospheric environment in the Yangtze River Delta, is also polluted seriously. The OC was strongly correlated with EC in Lin'an (R<sup>2</sup>=0.83), Nanjing (R<sup>2</sup>=0.72), and Suzhou (R<sup>2</sup>=0.72). This shows that the carbonaceous aerosols have similar sources during the winter in the Yangtze River Delta. All of the samples' OC/EC ratios exceeded 2.0, with the sample OC/EC ratios mainly distributed in the range of 2.5-6.0, indicating that coal combustion and vehicle exhaust are the main sources of OC and EC. The estimated mass concentrations of SOC were (9.23&plusmn;5.26), (6.82&plusmn;4.36), and (12.56&plusmn;7.52) &mu;g&bull;m<sup>-3</sup>, respectively, which contributed 42%, 34%, and 46% to the OC, indicating that SOC is an important part of OC. Backward-trajectory shows that the mass concentrations of PM<inf>2.5</inf>, OC, and EC have a good correlation with the transmission path of the main air mass. The mass concentrations of PM<inf>2.5</inf>, OC, and EC controlled by the air mass from poor air quality areas are 1.14-1.7 times, 1.55-2.1 times, and 1.94-2.47 times higher than that in the air mass from good air quality areas.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:57
Main heading:River pollution
Controlled terms:Air quality - Coal combustion - Organic carbon - Rivers
Uncontrolled terms:Ambient air quality standards - Atmospheric environment - Backward trajectory - Carbonaceous aerosol - Concentration distributions - Elemental carbon - PM2.5 - Yangtze river delta
Classification code:451.2  Air Pollution Control - 453  Water Pollution - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 804.1  Organic Compounds
Numerical data indexing:Percentage 3.40e+01%, Percentage 4.20e+01%, Time 8.64e+04s
DOI:10.13227/j.hjkx.201706178

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 168>

Accession number:20183905856509
Title:Bioavailability of Silicon Fertilizer Coupled Water Management on Soil Bioavailability and Cumulative Control of Rice in Compound Contaminated Paddy Soils
Authors:Li, Yuan-Xing-Lu (1, 2); Ye, Chang-Cheng (1, 2); Liu, Yu-Ling (1, 2); Li, Dan-Yang (1, 2); Liu, Shou-Tao (1, 2); Luo, Hai-Yan (1, 2); Liu, Xiao-Li (1, 2); Tie, Bo-Qing (1, 2); Sun, Jian (3) 
Author affiliation:(1) College of Resources and Environment, Hunan Agricultural University, Changsha; 410128, China; (2) Engineering Research Center of Efficient Utilization of Heavy Metal Pollution Cultivated, Changsha; Hunan Province; 410013, China; (3) School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou; 510006, China 
Corresponding author:Tie, Bo-Qing(tiebq@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:944-952
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effect of wet irrigation (CK), agronomic measure flooding (WF), instantaneous silicon fertilizer combined with flooding measures (FYsi), mineral silicon fertilizer combined with flooding measures (FKsi), and a mix of two kinds of silicon fertilizer combined with flooding measures (FYK) on the bio-availability of As and Cd in soil and the accumulation of As and Cd in rice were investigated by pot experiments. The results showed that the pH of the soils combined with flooding measures was increased by 0.12-0.72 units with similar trends of an increase and then a decrease before finally become neutral. The Eh of the soil combined with flooding was significantly decreased, but the Eh of soil after flooding treated by FYsi, FKsi, and FYK combined with the flooding was significantly higher than that treated by WF, and the content of Cd in brown rice was reduced by 38.83%-65.05% compared with that treated by CK. The WF and FYK treatments can significantly reduce the accumulation of Cd in brown rice, resulting in the lowest Cd contents in brown rice of 0.98 and 0.72 mg&bull;kg<sup>-1</sup>, respectively. The contents of As in brown rice treated by FYsi, FKsi, and FYK were decreased by 23.80%, 38.10%, and 47.62%, respectively, compared with that with the CK treatment, except that the content of As in brown rice treated by WF increased by 36.64%. FYsi and FYK treatments had the best inhibitory effect on the accumulation of As in brown rice, with the lowest As contents of 0.13 mg&bull;kg<sup>-1</sup> and 0.11 mg&bull;kg<sup>-1</sup> in brown rice (P &lt;0.01), respectively. There was an extremely significant correlation between the contents of extractable Cd and the total content of Cd in the brown rice (P &lt;0.05), and there was no significant difference between the contents of extractable As and the total content of As in the brown rice. Therefore, FYsi, FKsi, and FYK can effectively inhibit the accumulation of Cd and As in rice grown in Cd-As compound polluted soil, and FYK showed the best performance.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:43
Main heading:Soil pollution
Controlled terms:Arsenic - Arsenic compounds - Bioaccumulation - Biochemistry - Cadmium - Cadmium compounds - Chemicals removal (water treatment) - Fertilizers - Floods - Oil well flooding  - Silicon - Soils
Uncontrolled terms:Bio-availability - Combined pollutions - Inhibitory effect - Paddy soils - Polluted soils - Pot experiment - Soil bioavailabilities - Total content
Classification code:461.9  Biology - 483.1  Soils and Soil Mechanics - 511.1  Oil Field Production Operations - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2  Biochemistry - 804  Chemical Products Generally
Numerical data indexing:Percentage 2.38e+01%, Percentage 3.66e+01%, Percentage 3.81e+01%, Percentage 3.88e+01% to 6.50e+01%, Percentage 4.76e+01%
DOI:10.13227/j.hjkx.201707011

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 169>

Accession number:20183905856815
Title:Quantification of the Influence of Industrial Emissions on Volatile Organic Compounds (VOCs) Using PMF Model: A Case Study of Jiangbei Industrial Zone in Nanjing
Authors:Hu, Kun (1); Wang, Ming (1, 2); Zheng, Jun (1, 2); Wang, Hong-Li (3); Lu, Xing-Dong (1, 4); Jing, Sheng-Ao (3); Chen, Chao (5) 
Author affiliation:(1) College of Environment Science and Engineering, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing; 210044, China; (3) State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (4) Nanjing Intelligent Environmental Sci-Tech Co., Ltd., Nanjing; 211800, China; (5) Hangzhou Environmental Monitoring Station, Hangzhou; 310007, China 
Corresponding author:Wang, Ming(wangmingmelon@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:493-501
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 secondary organic aerosol. The effect of industrial emissions on ambient VOC concentrations in the Jiangbei Industrial Zone in Nanjing was evaluated using the ambient VOCs measurements taken at Nanjing University of Information Science and Technology (NUIST) during March 2017. The monitoring data showed that the sum of 92 measured VOCs (TVOCs) ranged from 10.3&times;10<sup>-9</sup> to 200.5&times;10<sup>-9</sup>. Some VOC species, such as ethylene, propene, benzene, styrene, and dichloromethane had abnormally high values. Positive matrix factorization model (PMF) was used to identify the main sources of VOCs. The results showed that industrial emissions on average accounted for 50.0% of TVOCs, while petrochemical industry, chemical industry, and paints &amp; solvents use accounted for 14.9%, 19.3% and 15.8%, respectively. During a VOC pollution episode, the contribution of industrial emissions reached 74.9%. The direction of industrial sources was determined by combining the wind speed and wind direction data.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Industrial emissions
Controlled terms:Chemical industry - Dichloromethane - Ethylene - Factorization - Gas chromatography - Styrene - Volatile organic compounds - Wind
Uncontrolled terms:Industrial sources - Nanjing - Petrochemical industry - Pollution episodes - Positive matrix factorization models - Science and Technology - Secondary organic aerosols - Source analysis
Classification code:443.1  Atmospheric Properties - 451.1  Air Pollution Sources - 802.3  Chemical Operations - 804.1  Organic Compounds - 805  Chemical Engineering, General - 921  Mathematics
Numerical data indexing:Percentage 7.49e+01%, Percentage 1.49e+01%, Percentage 1.58e+01%, Percentage 1.93e+01%, Percentage 5.00e+01%
DOI:10.13227/j.hjkx.201708254

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 170>

Accession number:20183905856765
Title:Characteristic of Nitrate Adsorption in Aqueous Solution by Iron and Manganese Oxide/Biochar Composites
Authors:Zheng, Xiao-Qing (1); Wei, An-Lei (1); Zhang, Yi-Xuan (1); Shi, Liang-Yu (1); Zhang, Xiao (1) 
Author affiliation:(1) College of Urban and Environment Sciences, Northwest University, Xi'an; 710127, China 
Corresponding author:Wei, An-Lei(alwei@nwu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1220-1232
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this study, we synthesized Fe/Mn bimetallic oxide coated biochar sorbents by pyrolysis of wheat straw impregnated with ferric chloride and potassium permanganate and investigated their potential to adsorb nitrate in water. X-ray photoelectron spectroscopy and scanning electron microscopy analysis suggests that Fe(&#8546;)/Mn(&#8547;) bimetallic oxide particles emerge on the sorbents. The optimized sorbent could achieve a specific surface area of 153.116 m<sup>2</sup>&bull;g<sup>-1</sup> and a point of zero charge of 9.76. Batch nitrate adsorption experiments were carried out to investigate the influence of various factors, such as sorbent dosage, initial solution pH, and co-existing anions. Results show that the sorbent maintained a high adsorption capacity of 75.40%-78.70% over a wide range of pH from 1.00 to 9.05, and the sorption mechanism was interpreted as ligand exchange. The effects of co-existing anions on the nitrate sorption followed the decreasing order of Cl<sup>-</sup>&gt;SO<inf>4</inf><sup>2-</sup>&gt;PO<inf>4</inf><sup>3-</sup>. Furthermore, the adsorption isotherms were well described by the Langmuir model, and the sorbent could exhibit a quite competitively high capacity of 37.361 3 mg&bull;g<sup>-1</sup> for nitrate removal. In addition, the accordance of sorption kinetics with the pseudo-second order model implied that the sorption could be a multi-stage controlled chemical process. In addition, the thermodynamic parameters suggested that the sorption reaction could be a spontaneous and endothermic process. The results demonstrated that the Fe/Mn bimetallic oxide coated biochar could serve as a promising agent for nitrate removal from water.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:39
Main heading:Iron oxides
Controlled terms:Adsorption - Adsorption isotherms - Chlorination - Chlorine compounds - Manganese oxide - Nitrates - Nitrogen removal - Potash - Potassium chloride - Scanning electron microscopy  - Solutions - Sorbents - X ray photoelectron spectroscopy
Uncontrolled terms:Bio chars - High adsorption capacity - Nitrate adsorptions - Point of zero charge - Potassium permanganate - Pseudo-second order model - Sorption kinetics - Thermodynamic parameter
Classification code:802.2  Chemical Reactions - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 7.54e+01% to 7.87e+01%, Specific_Surface_Area 1.53e+05m2/kg
DOI:10.13227/j.hjkx.201704216

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 171>

Accession number:20183905856744
Title:Emission Characteristics of Wind Erosion Dust from Topsoil of Urban Roadside-Tree Pool
Authors:Li, Bei-Bei (1, 2); Qin, Jian-Ping (2); Qi, Li-Rong (3); Yang, Tao (2); Qu, Song (2); Shi, Ai-Jun (2); Huang, Yu-Hu (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; (3) Beijing Productivity Center, Beijing; 100088, China 
Corresponding author:Huang, Yu-Hu(huangyuhu@sina.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1031-1039
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study characterized the wind erosion dust emissions from topsoil of urban roadside-tree pool. The study area is the Xicheng District of Beijing and uses GIS to obtain the spatial distribution of various road mileages. A full bore investigation method was carried out to survey tree pool in the Zhanlanlu Subdistrict to obtain the activity level of tree pool in the Xicheng district. The portable in situ wind erosion laboratory (PI-SWERL) was used to determine the emission factors of PM<inf>2.5</inf> from the wind erosion dust from tree pool and to estimate the PM<inf>2.5</inf> emission inventory of tree pool in the Xicheng District in 2016. The results showed that: &#9312;The annual emission factors per unit area of PM<inf>2.5</inf> from tree pool of freeways' frontage roads, major roads, minor roads, and alleys are 47.9, 7.9, 14.9, and 29.9 g&bull;(m<sup>2</sup>&bull;a)<sup>-1</sup>, respectively. The reduction rate of PM<inf>2.5</inf> emission factors from tree pool by precipitation was about 30.3% in 2016. &#9313;The annual emission factors per unit mileage of PM<inf>2.5</inf> from the tree pool of freeways' frontage roads, major roads, minor roads, branch roads, and alleys are 2.57, 2.33, 4.04, 7.31, and 5.44 kg&bull;(km&bull;a)<sup>-1</sup>, respectively, and the factors for branch roads are 1.3, 1.8, 2.8, and 3.1 times as much as those for alleys, minor roads, freeways' frontage roads, and major roads, respectively. Taking the emission factor for minor roads as an example, the winter emission factor is 1.3, 7.3, and 8.7 times greater than that in the spring, summer, and autumn, respectively. &#9314;PM<inf>2.5</inf> emissions from the tree pool in the Xicheng District of Beijing are 1.60 t&bull;a<sup>-1</sup>, and the uncertainty range of the emission inventory is -143%~184%. The emissions in winter are 0.68 t&bull;a<sup>-1</sup>, which are 1.1, 1.42, and 5.1 times greater than that in the spring, summer, and fall, respectively. The emission values for freeways' frontage roads, major roads, minor roads, collectors, and alleys account for 5.6%, 8.7%, 23.2%, 4.1%, and 58.4% of the total emissions, respectively. It is recommended that the urban roadside-tree pool be covered to reduce wind erosion dust emissions with materials that do not affect the growth of trees as soon as possible.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Forestry
Controlled terms:Dust - Erosion - Lakes - Roadsides - Urban growth
Uncontrolled terms:Emission characteristics - Emission factors - Emission inventories - Investigation methods - Roadside trees - Urban roadsides - Wind erosions - Winter emissions
Classification code:403.1  Urban Planning and Development - 406  Highway Engineering - 451.1  Air Pollution Sources
Numerical data indexing:Percentage 2.32e+01%, Percentage 3.03e+01%, Percentage 4.10e+00%, Percentage 5.60e+00%, Percentage 5.84e+01%, Percentage 8.70e+00%
DOI:10.13227/j.hjkx.201708109

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 172>

Accession number:20183905856768
Title:Removal Efficiency and Mechanism of Removal by Humic Acid of the Integrated Floc-ultrafiltration Process
Authors:Li, Wen-Jiang (1, 2); Yu, Li-Fang (1); Miao, Rui (1); Ma, Bai-Wen (2) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China 
Corresponding author:Ma, Bai-Wen(bwma@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1248-1255
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In recent years, the integrated ultrafiltration (UF) membrane process has been widely used due to its high removal efficiency, slight membrane fouling, and small land use. However, a number of problems gradually occurred regarding the integrated UF process caused by the granular adsorbents used, such as powdered activated carbon, carbon nano-tube, nanoscale zerovalent iron, etc. Severe membrane surface damage was easily caused by these granular adsorbents after a long running time, and the cost of most adsorbents was very high. In this study, to effectively overcome these problems, cheap and loose aluminum hydrolyzed flocs were directly injected into the membrane tank in the presence of humic acid (HA), with the aim of investigating the removal efficiency of HA and the corresponding membrane behavior. The results showed that the removal efficiency of HA could be influenced by aeration mode, floc injection frequency, and floc dosage. Compared with intermittent aeration and one-time injection, a loose "protection membrane" layer was formed with continuous aeration and batch injections. Therefore, HA molecules were largely removed, leading to the dramatic alleviation of membrane fouling. The transmembrane pressure significantly increased to 74.8 kPa in the absence of flocs after running for 5 days, but that only increased by 6.3 kPa with continuous aeration and an injection frequency of once every 2 d (each addition consisted of 5.4 mmol&bull;L<sup>-1</sup> flocs) after running for 8 days. The removal efficiency of HA was 73.3% (8 d), which was much higher than in the absence of flocs (5 d, 32.1%). Additionally, only a few HA molecules were adsorbed onto the membrane pores with the batch injections, and a loose cake layer was the main fouling mechanism. With higher dosages of flocs injected each time, the average membrane pore diameter was larger after washing. Based on this excellent performance, this floc-integrated UF membrane technology indeed shows large application potential in water treatment.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Membrane technology
Controlled terms:Activated carbon - Activated carbon treatment - Biological materials - Carbon nanotubes - Chemical water treatment - Efficiency - Land use - Membrane fouling - Molecules - Organic acids  - Ultrafiltration
Uncontrolled terms:Alum-based flocs - Humic acid - Nanoscale zero-valent iron - Powdered activated carbon - Removal mechanism - Transmembrane pressures - Ultrafiltration membranes - Ultrafiltration process
Classification code:403  Urban and Regional Planning and Development - 461.2  Biological Materials and Tissue Engineering - 761  Nanotechnology - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 913.1  Production Engineering - 931.3  Atomic and Molecular Physics - 951  Materials Science
Numerical data indexing:Age 1.37e-02yr, Age 2.19e-02yr, Molar_Concentration 5.40e+00mol/m3 to 2.20e-02mol/m3, Percentage 3.21e+01%, Pressure 6.30e+03Pa, Pressure 7.48e+04Pa
DOI:10.13227/j.hjkx.201706137

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 173>

Accession number:20183905856822
Title:Pollution Characteristics and Emission Coefficient of Volatile Organic Compounds from Auto/motorcycle Parts &amp; Accessories Manufacturing in Zhejiang Province
Authors:Yang, Zhong-Ping (1); Wang, Zhe-Ming (2); He, Zhi-Qiao (1); Xu, Zhi-Rong (2); Teng, Fu-Hua (2); Zhang, Hua-Yue (2) 
Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310014, China; (2) Zhejiang Province Academy of Environmental Science, Hangzhou; 310007, China 
Corresponding author:Xu, Zhi-Rong(zhirong.x@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:551-556
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The status of volatile organic compound (VOC) treatment in auto/motorcycle parts &amp; accessories manufacturing in Zhejiang province was analyzed based on data from a survey investigating 70 concerned enterprises conducted in 2015. The pollution characteristics were further explored and the emission coefficient of VOCs released from this industry was preliminarily calculated by analyzing the survey data of 56 of the typical enterprises that had been screened further. The results showed that about two thirds of the enterprises had been equipped with collection and treatment facilities, but most of those facilities were running abnormally. Solvent-based materials were used commonly in this industry, and the main VOCs pollutants were xylene, butyl acetate, cyclohexanone, acetic ether, and toluene. The VOCs emission coefficient of auto/motorcycle parts &amp; accessories manufacturing in Zhejiang was 414 g&bull;(thousand yuan)<sup>-1</sup>, whereas the emission coefficient of the enterprises producing parts &amp; accessories for only auto was 294 g&bull;(thousand yuan)<sup>-1</sup>. As for the the enterprises producing parts &amp; accessories for only motorcycle and for both auto and motorcycle, the emission coefficient reached 715 g&bull;(thousand yuan)<sup>-1</sup>.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Gas chromatography
Controlled terms:Manufacture - Motorcycles - Organic solvents - Painting - Pollution - Surveys - Volatile organic compounds
Uncontrolled terms:Butyl acetate - Cyclohexanones - Emission characteristics - Emission coefficient - Material balance - Solvent-based materials - Volatile organic compound (VOC) - Zhejiang Province
Classification code:537.1  Heat Treatment Processes - 662.2  Smaller Vehicles - 802.3  Chemical Operations - 804.1  Organic Compounds - 813.1  Coating Techniques
DOI:10.13227/j.hjkx.201701187

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 174>

Accession number:20183905856505
Title:Characterization of Phosphorus in Urban Surface Soils in Kaifeng City and Its Risk of Loss
Authors:Bai, Xiu-Ling (1, 2); Ma, Jian-Hua (1, 2); Sun, Yan-Li (3); Liu, De-Xin (1, 2) 
Author affiliation:(1) Institute of Natural Resources and Environment, Henan University, Kaifeng; 475004, China; (2) College of Environment and Planning, Henan University, Kaifeng; 475004, China; (3) Department of Urban and Environmental Science, Xuchang University, Xuchang; 461000, China 
Corresponding author:Ma, Jian-Hua(mjh@henu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:909-915
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Characterization of phosphorus (P) and its risk of loss in urban soils in Kaifeng City, Henan Province were studied through field sampling and laboratory experiments. The spatial distribution of P and the map of risk of loss were obtained using geostatistical and spatial analysis techniques. The P content in urban soils ranged from 400 to 1 427 mg&bull;kg<sup>-1</sup>, the proportions of inorganic P in total P ranged from 65% to 99%, and Olsen-P and CaCl<inf>2</inf>-P in soils were 3.41-115.03 mg&bull;kg<sup>-1</sup> and 0.01-9.40 mg&bull;kg<sup>-1</sup>, respectively. The composition of P was consistent in different urban areas and P concentrations were higher in residential areas. Spatial variations in P concentrations in soils were significant; the concentrations of P in eastern Kaifeng City were higher than those in western Kaifeng and the highest concentrations were detected in central Kaifeng. Olsen-P can be used as an indicator of the leaching risk of soil P. The critical value of leaching P from the soil was 22.18 mg&bull;kg<sup>-1</sup> and the concentration of Olsen-P in 33.64% of urban soil samples exceeded the critical value. The highest risk of P loss existed in central Kaifeng City.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Phosphorus compounds
Controlled terms:Characterization - Chlorine compounds - Leaching - Phosphorus - Risk assessment - Soils - Spatial distribution
Uncontrolled terms:Geostatistical - Henan Province - Kaifeng - Laboratory experiments - Residential areas - Spatial analysis - Spatial variations - Urban soils
Classification code:483.1  Soils and Soil Mechanics - 802.3  Chemical Operations - 804  Chemical Products Generally - 914.1  Accidents and Accident Prevention - 921  Mathematics - 951  Materials Science
Numerical data indexing:Percentage 3.36e+01%, Percentage 6.50e+01% to 9.90e+01%
DOI:10.13227/j.hjkx.201707071

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 175>

Accession number:20183905856779
Title:Influence of Ciprofloxacin on the Microbial Community and Antibiotics Resistance Genes in a Membrane Bioreactor
Authors:Dai, Qi (1); Liu, Rui (1); Liang, Yu-Ting (2); Shu, Xiao-Ming (1); Xu, Can-Can (1); Chen, L&uuml;-Jun (1, 3) 
Author affiliation:(1) Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Environment in Yangtze Delta Region Institute of Tsinghua University, Jiaxing; Zhejiang; 314006, China; (2) Institute of Soil Science, Chinese Academy of Sciences, Nanjing; 210008, China; (3) School of Environment, Tsinghua University, Beijing; 100084, China 
Corresponding author:Liu, Rui(liuruitsinghuazj@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1333-1341
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A membrane bioreactor (MBR) was used to treat ciprofloxacin (CIP)-contaminated artificial wastewater. The microbial community structure and the abundance of antibiotic resistant genes (ARGs) in the MBR were studied at four CIP dosages (0, 5 mg&bull;L<sup>-1</sup>, 10 mg&bull;L<sup>-1</sup>, and 15 mg&bull;L<sup>-1</sup>). The results showed that Proteobacteria and Bacteroidetes remained the dominant phylum, with relative abundances of 57.5% and 12.7%, respectively, as the dosage of CIP was increased from 0 mg&bull;L<sup>-1</sup> to 15 mg&bull;L<sup>-1</sup>. Rhodocyclaceae, Chitinophagaceae, and Comamonadaceae became the dominant family with abundances of 29.96%, 5.44%, and 6.60%, respectively. Methyloversatilis, Ferruginibacter, Zoogloea, and Comamonas became the dominant genus, with relative abundances of 21.70%, 7.56%, 5.24%, and 4.15%, respectively. The decrease of Chao1, ACE, and Shannon and the increase of Simpson indicated a decrease in microbial abundance and diversity. The relative abundances of Nitrosomonas, Nitrospira, Alcaligenes, and Nitrobacter decreased, which caused a decrease in the NH<inf>3</inf>-N removal rate. A CIP-ARGs analysis revealed that the relative abundances of gyrA, gyrB, and parC were increased, beginning after the sludge was dosed with 5 mg&bull;L<sup>-1</sup>of CIP for 33 days, which augmented the risk for microbial drug-resistance.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:34
Main heading:Bioreactors
Controlled terms:Ammonia - Antibiotics - Bioconversion - Drug therapy - Genes - Microorganisms - Risk assessment - Wastewater treatment
Uncontrolled terms:Ammonium nitrogen - Antibiotic-resistant genes - Ciprofloxacin - Membrane bio reactor (MBR) - Microbial communities
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461  Bioengineering and Biology - 801.2  Biochemistry - 804.2  Inorganic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 2.17e+01%, Percentage 3.00e+01%, Percentage 4.15e+00%, Percentage 5.24e+00%, Percentage 5.44e+00%, Percentage 5.75e+01%, Percentage 6.60e+00%, Percentage 7.56e+00%, Age 9.04e-02yr, Mass_Density 0.00e+00kg/m3 to 1.50e-02kg/m3, Mass_Density 1.00e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 1.50e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 1.27e+01%
DOI:10.13227/j.hjkx.201706179

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 176>

Accession number:20183905856743
Title:A 2013-based Atmospheric Ammonia Emission Inventory and Its Characteristic of Spatial Distribution in Henan Province
Authors:Wang, Chen (1); Yin, Sha-Sha (1); Yu, Shi-Jie (1); Wei, Jun-Hua (1); Gu, Xing-Ke (1); Gong, Mi-Mi (1); Zhang, Rui-Qin (1) 
Author affiliation:(1) Research Institute of Environmental Science, College of Chemistry and Molecular Engineering, 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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1023-1030
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on the best available activity data at a city level from top down and bottom up methods, a 2013-based emission inventory of NH<inf>3</inf> was established for the Henan Province using an emission factors method. The 3 km&times;3 km spatial gridded distribution was carried out by using GIS technology. The results showed that the total amount of atmospheric NH<inf>3</inf> emission in Henan Province in 2013 was 1 035.3 kt, and the average emission intensity reached levels of 6.4 t/km<sup>2</sup>. Livestock and nitrogen fertilizer applications were the top two emission sources, accounting for 52.71% and 31.53% of the total emissions, respectively. Beef, laying hen, and goats were the main contributors in the livestock category, accounting for 34.98%, 16.63%, and 14.02% of the total emissions, respectively. There were different characteristics between emission source contributions and emission intensities in each city. Nanyang, Zhoukou, Shangqiu, and Zhumadian were the prefecture-level cities with large emissions, accounting for 11.53%, 9.84%, 9.62%, and 9.57% of the total amount in Henan Province, respectively. The NH<inf>3</inf> emission intensities of Puyang and Louhe were larger than those of other cities, reaching up to 10.7 t&bull;km<sup>-2</sup> and 10.2 t&bull;km<sup>-2</sup>, respectively. The spatial distribution revealed that emissions in the middle eastern region were relatively higher; whereas, the western region emissions were relatively low. The areas with high emissions were concentrated in the plains and densely populated areas.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Spatial distribution
Controlled terms:Agriculture - Ammonia - Nitrogen fertilizers - Plutonium compounds
Uncontrolled terms:Atmospheric ammonia - Bottom up methods - Emission factors - Emission intensity - Emission inventories - Fertilizer applications - Gridded allocation - Livestock
Classification code:804  Chemical Products Generally - 804.2  Inorganic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 921  Mathematics
Numerical data indexing:Percentage 1.15e+01%, Percentage 1.40e+01%, Percentage 1.66e+01%, Percentage 3.15e+01%, Percentage 3.50e+01%, Percentage 5.27e+01%, Percentage 9.57e+00%, Percentage 9.62e+00%, Percentage 9.84e+00%
DOI:10.13227/j.hjkx.201706103

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 177>

Accession number:20183905856846
Title:Mechanism on Enhanced Nitrogen Removal in Municipal Secondary Effluent via Internal-Electrolysis Constructed Wetlands at Low Temperature in Winter
Authors:Zheng, Xiao-Ying (1); Zhu, Xing (1); Wang, Ju (2); Zhou, Xiang (1); Xu, Ya-Dong (2); Wei, Cheng (2); Gao, Ya-Jie (1); Zhou, Gan (1) 
Author affiliation:(1) Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes, College of Environment, Hohai University, Nanjing; 210098, China; (2) Water Resources Service Center of Jiangsu Province, Nanjing; 210029, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:758-764
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Aiming at the low pollutant removal efficiency of constructed wetlands (CWs) at low temperature in winter, three laboratory-scale vertical-flow CWs, namely unplanted CWs, ordinary CWs, and internal-electrolysis CWs, were used to investigate the nitrogen removal efficiency of municipal secondary effluent when the water temperature was 3-12&#8451;. Moreover, the mechanism of enhanced denitrification of the new wetland was revealed through analysis of the microbial community diversity and community structure. The results showed that the internal-electrolysis CWs could make better use of the carbon sources in the municipal secondary effluent and had a higher removal rate. The effluent TN concentration was maintained at about (9&plusmn;0.29) mg&bull;L<sup>-1</sup>. The average TN removal rate was 42.27%, which was 17.91% and 17.33% higher than those of the unplanted CWs and ordinary CWs, respectively. The microbial activity was detected using fluorescein diacetate (FDA), and the result revealed that the microbial activity of the internal-electrolysis CWs could reach 0.224 mg&bull;g<sup>-1</sup>, which was 2.6 times and 3.4 times of that of the unplanted CWs and ordinary CWs, respectively. The microbial denitrification intensity of the internal-electrolysis CWs was 2.8 times and 3.3 times of that of the unplanted and ordinary CWs, respectively. The results of high-throughput sequencing showed that the microbial community diversity of the internal electrolysis CWs was higher than those of the unplanted and ordinary CWs. Denitrification microorganisms were detected, mainly Dechloromonas, Rhizobium, Hyphomicrobium, and Rhodobacter, as well as Thiobacillus, which is an autotrophic denitrifying bacterium. There were obvious advantages in the total amount of denitrifying microorganisms in the internal-electrolysis CWs, as the denitrification microorganisms accounted for 7.13% of the total microbial biomass, which was 3.8 times and 8.7 times of that of the unplanted CWs and ordinary CWs, respectively.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Temperature
Controlled terms:Bacteria - Denitrification - Efficiency - Effluents - Electrolysis - Nitrogen removal - Water pollution - Wetlands
Uncontrolled terms:Constructed wetlands - Denitrifying microorganisms - High-throughput sequencing - Low temperatures - Microbial characteristics - Municipal secondary effluents - Nitrogen removal efficiency - Pollutant removal efficiency
Classification code:452.3  Industrial Wastes - 453  Water Pollution - 641.1  Thermodynamics - 802.2  Chemical Reactions - 913.1  Production Engineering
Numerical data indexing:Percentage 1.73e+01%, Percentage 1.79e+01%, Percentage 4.23e+01%, Percentage 7.13e+00%
DOI:10.13227/j.hjkx.201704155

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 178>

Accession number:20183905856750
Title:Sources, Distribution of Main Controlling Factors, and Potential Ecological Risk Assessment for Heavy Metals in the Surface Sediment of Hainan Island North Bay, South China
Authors:Zeng, Wei-Te (1, 2, 3, 4); Yang, Yong-Peng (4); Zhang, Dong-Qiang (5); Liu, Bing (1, 3); Zhang, Hang-Fei (6); Wu, Duo-Yu (6); Wang, Xiao-Lin (4) 
Author affiliation:(1) Hainan Marine Geological Survey, Haikou; 570206, China; (2) College of Marine Geosciences, Ocean University of China, Qingdao; 266100, China; (3) Hainan Bureau of Geology, Haikou; 570206, China; (4) Hainan Geological Survey, Haikou; 570206, China; (5) Hainan Geological Comprehensive Survey, Haikou; 570206, China; (6) Hainan Geological Survey and Designing Institute, Haikou; 570206, China 
Corresponding author:Zhang, Dong-Qiang(zhangdongqiang83@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1085-1094
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The distribution characteristics of the content of As, Cr, Cu, Hg, Pb, Zn, and Cd were researched based on the geochemical analysis of 159 surface sediment samples in Haikou Bay, Puqian Bay, Dongzhai Harbor, and Mulan Bay Mathematical statistics methods were used to interpret the sources of heavy metals, and the main controlling factors for heavy metal distribution were confirmed, having been analyzed qualitatively and semi-quantitatively. The results showed that the average contents of As, Cd, Cr, Cu, Hg, Pb, and Zn were 8.40, 0.06, 32.50, 8.32, 0.02, 18.77, and 35.87 &mu;g&bull;g<sup>-1</sup>, respectively. High contents of Cr, Cu, Hg, Pb, and Zn are mainly distributed in estuaries and harbors. The content of As increased gradually from south to north in the research area, while Cd gathered mainly in Haikou Bay. The source of Cu, Zn, Hg, Pb, Cr, and Cd in sediment was terrestrial input, which was controlled by anthropogenic pollution and migration of weathered products from mother rock. The source of As could be overseas material input. The grain size of sediment was the main factor controlling the contents of Cu, Zn, Hg, Pb, and Cr, and it was found that sediments with a finer grain size have more heavy metals adsorbed. The high As content was controlled mainly by the natural geological background factor, while the content of Cd reflected the difference in regional pollution caused by differing development in cities. Three surface sediment samples were evaluated as class &#8545; of the National Marine Sediment Standard due to the content of As, while six surface sediment samples were evaluated as class &#8545; due to the content of Cr, of which the pollution degree was moderate. The concentrations of Cd, Cu, Hg, Pb, and Zn in all of the 159 sediment samples fall in the &#8544; class, of which the pollution degree is low. The degree of pollution for seven heavy metals were arranged in the following order: As&gt;Cr&gt;Pb&gt;Zn&gt;Cu&gt;Cd&gt;Hg. The potential ecological risk assessment results indicated that all heavy metals in surface sediment caused low levels of pollution generally, and that each heavy metal element was at a low ecological risk level. The order for the ecological risk of the seven heavy metals was: As&gt;Hg&gt;Cd&gt;Pb&gt;Cu&gt;Cr&gt;Zn; therefore, As was the main ecological risk factor. In general, the potential ecological risk for heavy metals was low, which illustrated that the marine environment in the study area was excellent.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Risk assessment
Controlled terms:Analytical geochemistry - Grain size and shape - Heavy metals - Marine pollution - Rock products - Statistics - Submarine geology - Surficial sediments
Uncontrolled terms:Controlling factors - Distribution - Ecological risk assessment - Hainan island - North bay - Source
Classification code:453  Water Pollution - 471.1  Oceanography, General - 483  Soil Mechanics and Foundations - 505  Mines and Mining, Nonmetallic - 531  Metallurgy and Metallography - 801  Chemistry - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201705159

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 179>

Accession number:20183905856838
Title:Spatio-temporal Distribution Characteristics of PM<inf>2.5</inf> and Spatio-temporal Variation Characteristics of the Relationship Between PM<inf>2.5</inf> and PM<inf>10</inf> in Beijing
Authors:Yang, Wen-Tao (1, 2); Yao, Shi-Qi (3); Deng, Min (4); Wang, Yan-Jun (1, 2) 
Author affiliation:(1) School of Resource Environment and Safety Engineering, 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) Geographic Resource Management Department, Chinese University of Hong Kong, Hong Kong; 999077, Hong Kong; (4) Department of Geo-informatics, School of Geosciences and Info-physics, Central South University, Changsha; 410083, China 
Corresponding author:Yao, Shi-Qi(shiqi_yao@outlook.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:684-690
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Spatio-temporal distribution of PM<inf>2.5</inf> and variations in the relationship between PM<inf>2.5</inf> and other pollutants are the main components of PM<inf>2.5</inf>spatio-temporal statistical analysis. Existing methods directly analyze spatio-temporal distribution based on monitoring data; thus, it is difficult to effectively reveal the aggregation structure of PM<inf>2.5</inf> concentrations. Geographically weighted regression, commonly used to model the relationships between PM<inf>2.5</inf> and other pollutants, cannot accurately describe the spatio-temporal variability of dependency. In this study, the clustering structure of PM<inf>2.5</inf> concentrations in Beijing was identified using the spatial clustering algorithm and the seasonal distribution characteristics of PM<inf>2.5</inf> were analyzed based on the clustering results. The relationship between PM<inf>2.5</inf> and PM<inf>10</inf> was modeled by geographically and temporally weighted regression and the spatio-temporal variability of dependency was analyzed according to the regression results. The results showed that PM<inf>2.5</inf> pollution levels and spatial variability were lower in spring and summer than those in autumn and winter and the concentration of PM<inf>2.5</inf> in each season was characterized by low spatial distribution in the north and high spatial distribution in the south. Geographically and temporally weighted regression showed better performance; the correlations between PM<inf>2.5</inf> and PM<inf>10</inf> in spring and summer are weaker than those in autumn and winter and the correlation between PM<inf>2.5</inf> and PM<inf>10</inf> in the northwest is stronger than that in the southeast in each season.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:24
Main heading:Particles (particulate matter)
Controlled terms:Clustering algorithms - Pollution - Regression analysis - Spatial distribution
Uncontrolled terms:Fuzzy C means clustering - PM2.5 - Spatial clustering - Spatiotemporal distributions - Weighted regression
Classification code:903.1  Information Sources and Analysis - 921  Mathematics - 922.2  Mathematical Statistics - 951  Materials Science
DOI:10.13227/j.hjkx.201703222

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 180>

Accession number:20183905856839
Title:Quantification of Methane Ebullition Flux from Small Ponds Using the Inverted-Funnel Method
Authors:Zhang, Xiu-Fang (1); Xiao, Wei (1, 2); Zhang, Mi (1); Wang, Wei (1); Zhao, Jia-Yu (1); Hu, Yong-Bo (1); Xie, Cheng-Yu (1); Zhang, Zhen (1); Xie, Yan-Hong (1); Huang, Wen-Jing (1) 
Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China; (2) Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China 
Corresponding author:Xiao, Wei(wei.xiao@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:691-702
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To quantify the ratio of CH<inf>4</inf> ebullition to total flux in subtropical shallow ponds, the CH<inf>4</inf> flux at the water-air interface was measured using the inverted-funnel and water equilibrium methods in two small ponds in Quanjiao, Anhui Province from July 28 to August 13, 2016. The average CH<inf>4</inf> ebullition fluxes were 121.78 and 161.08 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> and the average diffusion fluxes were 3.38 and 3.79 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> over pond A and pond B, respectively. The ebullition flux accounted for 97.5% and 96.4% of the total flux over pond A and pond B, respectively. Methane ebullition ranged from 0.11 to 446.90 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> over pond A and from 0.05 to 607.51 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> over pond B. Gas ebullition rate during the day was higher than that at night and was controlled by wind speed. Methane ebullition flux was influenced by wind speed over the shallow pond at hourly scale and by water depth and wind speed at daily scale, with positive correlation with wind speed and negative correlation with water depth. Varying with latitude, methane ebullition flux was higher for the water bodies in the mid-latitude region compared to those in the high-latitude region. Direct observations of the methane ebullition flux over small ponds provide data support and theoretical reference to precisely estimate the contribution of inland water bodies to regional and global carbon cycle.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:52
Main heading:Lakes
Controlled terms:Methane - Phase interfaces - Ponds - Wind
Uncontrolled terms:Diffusion fluxes - Direct observations - Equilibrium methods - High-latitude regions - Inverted funnel - Negative correlation - Positive correlations - Water-air interface
Classification code:443.1  Atmospheric Properties - 454.3  Ecology and Ecosystems - 801.4  Physical Chemistry - 804.1  Organic Compounds
Numerical data indexing:Percentage 9.64e+01%, Percentage 9.75e+01%
DOI:10.13227/j.hjkx.201707117

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 181>

Accession number:20183905856424
Title:Stabilization Effects of Fe-Mn Binary Oxide on Arsenic and Heavy Metal Co-contaminated Soils Under Different pH Conditions
Authors:Fei, Yang (1, 2, 3); Yan, Xiu-Lan (1, 2); Li, Yong-Hua (1, 2) 
Author affiliation:(1) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) Key Laboratory of Land Surface Pattern and Simulation, Chinese Academy of Sciences, Beijing; 100101, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Yan, Xiu-Lan(yanxl@igsnrr.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1430-1437
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:pH is one of the most important factors affecting speciation and stabilization of arsenic and heavy metals in soil. In this study, Fe-Mn binary oxide (FMBO), synthesized by redox and precipitation reactions, was taken as the research object to evaluate its stabilization effects on As, Pb, Cd, Zn, and Cu in three types of soils under different pH conditions and to study the impacts on soil pH and buffering capacity. The results showed that the leaching concentrations of As and Pb were lower in the pH range of 3-9 (neutral and weak acidic) and 5-10 (neutral and weak alkaline); and Cd, Zn, and Cu were stable in the pH range of 7-11 (alkaline). The stability and stabilization effects of FMBO were better under alkaline conditions than acidic. In the optimal pH range, the optimum stabilization efficiency of FMBO could reach 92.7%, 100%, 97.0%, 88.7%, and 82.7% for As, Pb, Cd, Zn, and Cu, respectively. In addition, FMBO addition could increase soil pH and the acid buffering capacity moderately, which improved heavy metal stabilization and made it more suitable for acid soils and areas with more acid rain. From the correlation of contaminants and soil elements in the leachates, Fe played an important role in As stabilization, and pH had a great influence on the stabilization of Pb, Cd, Zn, and Cu.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Stabilization
Controlled terms:Acid rain - Alkalinity - Arsenic - Binary alloys - Cobalt alloys - Copper - Heavy metals - Iron alloys - Iron oxides - Manganese alloys  - pH - pH effects - Redox reactions - Soil pollution - Soils
Uncontrolled terms:Buffering capacities - Fe-mn binary oxides - Heavy metal stabilization - Heavy metals in soil - Leaching concentrations - Precipitation reaction - Stability and stabilizations - Stabilization effects
Classification code:451.1  Air Pollution Sources - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 543.2  Manganese and Alloys - 544.1  Copper - 545.2  Iron Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.1  Chemistry, General - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.00e+02%, Percentage 8.27e+01%, Percentage 8.87e+01%, Percentage 9.27e+01%, Percentage 9.70e+01%
DOI:10.13227/j.hjkx.201707101

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 182>

Accession number:20183905856851
Title:Screening Method of Priority Control Pollutants in Groundwater Based on Contamination Assessment
Authors:Zhao, Peng (1); He, Jiang-Tao (1); Wang, Man-Li (1); Huang, De-Liang (1); Wang, Lei (1); Liang, Yu (1) 
Author affiliation:(1) Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences (Beijing), Beijing; 100083, China 
Corresponding author:He, Jiang-Tao(jthe@cugb.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:800-810
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Screening of priority control pollutants is an effective technical means for environmental management and environmental quality protection. Quick and efficient identification of pollutants is useful when attempting to prevent and control groundwater pollution. In order to explore a screening system for a set of priority pollutants that can be applied to regions with weak basic information, a screening method of priority pollutants based on contamination assessment is put forward in this paper. Based on the data of groundwater detection and analysis, using the evaluation method for pollution index classification, and combined with the pollution degree frequency score superposition method. The screening method of priority control pollutants in groundwater based on contamination assessment was established. This method was applied to the screening of pollutants in groundwater in the city of Golmud in Qinghai Province, China. The results were verified by using the screening system based on risk assessment, and the differences in the two systems are discussed. The results show that three categories of 10 kinds of chemical parameters, including TDS, total hardness, chloride, sulfate, sodium, fluorine, total iron, pyrene, phenanthrene, and aluminum, were determined as priority control pollutants in the Golmud region. It was consistent with the results of the screening method based on the risk assessment, and the screening results were reliable. The method based on risk assessment is complex and requires additional basic information, but it has certain foresight and is suitable for regions with abundant basic data. The method based on contamination assessment is simple and convenient and requires less abundant basic data. However, it is easily affected by background values. It is more suitable for the screening of priority control pollutants in regions with weak pollution source information.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Groundwater pollution
Controlled terms:Aluminum chloride - Chlorine compounds - Contamination - Environmental management - Groundwater - Pollution control - Quality control - Risk assessment - Sulfur compounds
Uncontrolled terms:Chemical parameters - Contamination assessment - Environmental quality - Groundwater detection - Priority control - Priority pollutants - Screening methods - Superposition method
Classification code:444.2  Groundwater - 454.1  Environmental Engineering, General - 804  Chemical Products Generally - 913.3  Quality Assurance and Control - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201706283

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 183>

Accession number:20183905856842
Title:Characteristics of Chromophoric Dissolved Organic Matter (CDOM) in Rivers of Western Sichuan Plateau Based on EEM-PARAFAC Analysis
Authors:Liu, Yan-Yang (1); Qin, Ji-Hong (2); Liu, Chen (3); Sun, Hui (1); Tang, Xiang-Yu (3); Fan, Shi-Yu (1) 
Author affiliation:(1) Sichuan Research Center for Soil Environment Protection Engineering and Technology, Department of Environmental Science and Engineering, Sichuan University, Chengdu; 610065, China; (2) Department of Environmental Engineering, Chengdu University, Chengdu; 610106, China; (3) Institute of Mountain Hazard and Environment, Chinese Academy of Sciences, Chengdu; 610041, China 
Corresponding author:Sun, Hui(sunhuifiles@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:720-728
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Alpine meadows and wetlands of western Sichuan plateau are essential organic carbon pools for Tibetan plateau; thus, a thorough understanding of the characteristics of dissolved organic carbon (DOC) and its association with soil carbon storage pool helps to reveal the flux and intensity of DOC export in the area. Surface water samples were collected from three rivers (the upper reaches of Min River, Zagunao River, and Fubian River) in the alpine-gorge region and Bai River in the plateau planation surface distributed among the watersheds in western Sichuan plateau, Southwest China. UV absorbance and EEM fluorescence spectroscopy with parallel factor analysis (PARAFAC) was used to characterize chromophoric dissolved organic matter (CDOM). PARAFAC produced a three-component model: C<inf>1</inf>(260/480) and C<inf>2</inf>(310/420) represented terrestrial humic-like fluorophores, and C<inf>3</inf>(280/370) belonged to tyrosine-like substances. The total fluorescence intensity of CDOM in the alpine-gorge region showed fewer changes along the rivers and was lower than that of the Bai River in the hilly plateau. The Bai River had much higher concentrations of humic-like substances (C<inf>1</inf>,C<inf>2</inf>) compared to the other three rivers, indicating its terrestrial sources with high humification degree originated from meadows and watersheds along the river. The calculated fluorescence indices (FI, BIX, HIX, &beta;:&alpha;) showed that CDOM in the alpine-gorge region was a mixture with both autochthonous and allochthonous origins with low humification degree, while CDOM in the plateau planation surface had a higher degree of humification and lower extent of degradation. Statistical analysis showed that the C<inf>1</inf> and C<inf>2</inf> components in four rivers were significantly positively correlated, and C<inf>1</inf>, C<inf>2</inf> and C<inf>3</inf> components in Bai River were significantly positively correlated. &beta;:&alpha; and BIX were significantly positively correlated in four rivers, but there was no significant correlation between DOC and CDOM [a(355)].<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Rivers
Controlled terms:Amino acids - Biodegradation - Biogeochemistry - Dissolution - Fluorescence - Fluorescence spectroscopy - Organic carbon - Water analysis - Watersheds
Uncontrolled terms:Chromophoric dissolved organic matter - Dissolved organic carbon - Fluorescence intensities - Humic-like substances - Natural waters - PARAFAC - Parallel factor analysis - Western Sichuan
Classification code:444.1  Surface Water - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 801  Chemistry - 801.2  Biochemistry - 802.3  Chemical Operations - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201708208

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 184>

Accession number:20183905856758
Title:Characteristics of Sediment Oxygen Demand in a Drinking Water Reservoir
Authors:Su, Lu (1); Huang, Ting-Lin (1); Li, Nan (1); Zhang, Hai-Han (1); Wen, Gang (1); Li, Yang (1); Chen, Jia-Wei (1); Wang, Xiao-Jiang (1) 
Author affiliation:(1) 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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1159-1166
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Depletion of dissolved oxygen (DO) in the hypolimnetic layer during stratification periods and its deleterious effects on water quality have been widely observed. However, it is still difficult to comprehend conceptually the processes of oxygen consumption at the sediment-water interface. The research presented here is, therefore, based on an areal hypolimnetic oxygen demand (AHOD) model to address three key themes related to the sediment oxygen demand (SOD): &#9312; the characteristics of sediment and its influences on SOD; &#9313; evaluation of SOD with different turbulence levels overlying the sediment; and &#9314; the influence of microbial metabolic activity on SOD. Sediment samples were collected at the entrance to and over the basin area of Jinpen Reservoir, and a sediment-water experimental chamber was designed to achieve these goals. The results showed that, under quiescent conditions, the SOD<inf>5area</inf>(SOD at DO of 5 mg&bull;L<sup>-1</sup>) were 0.13 g&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> and 0.36 g&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> in the arm and basin, respectively. Under dynamic conditions, the slight mixing of the water column near the sediment induced an increase in SOD and resulted in a gradual shift from first-order to zero-order DO uptake. The organic matter content in the reservoir arm and profundal sediment were 44.43 mg&bull;g<sup>-1</sup> and 45.12 mg&bull;g<sup>-1</sup>, respectively. The microbial metabolic activity in the basin was stronger, and the total fluorescence intensity of the dissolved organic matter (DOM) in the profundal sediments was about 1.5 times that in the reservoir arm. These results suggest that SOD will be higher when microbial metabolic activity is stronger and organic matter content is higher in sediments. The oxygenation aeration techniques should be designed to meet the oxygen demand of the deep reservoir to provide a theoretical basis for improving the oxygenation efficiency.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Dissolved oxygen
Controlled terms:Biochemical oxygen demand - Biogeochemistry - Biological materials - Metabolism - Organic compounds - Oxygenation - Potable water - Reservoirs (water) - Sediments - Surface waters  - Water quality
Uncontrolled terms:Biolog-Eco - Dissolved organic matters - EMMs - Fluorescence intensities - Metabolic activity - Oxygenation efficiency - Sediment oxygen demand - Sediment water interface
Classification code:441.2  Reservoirs - 444  Water Resources - 444.1  Surface Water - 445.2  Water Analysis - 461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 483  Soil Mechanics and Foundations - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 5.00e-03kg/m3 to 2.20e-02kg/m3
DOI:10.13227/j.hjkx.201706141

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 185>

Accession number:20183905856773
Title:Effect of Intermediate-Setting Aeration on the CANON Granular Sludge Process in the AUSB Reactor
Authors:Cheng, Shuo (1); Li, Dong (1); Zhang, Jie (1, 2); Li, Shuai (2); Cao, Rui-Hua (1); L&uuml;, Sai-Sai (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 Municipal and Environmental Engineering, 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:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1286-1293
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The impact of different aeration positions on startup and operation of the continuous flow CANON granular sludge process was considered by inoculating flocculent ANAMMOX activated sludge at room temperature (25&plusmn;1)&#8451; in two sets of AUSB reactors. The aeration unit of R1 was installed 0.3 m above the base, while the aeration unit of R2 was set at the bottom. R1 and R2 successfully developed the granule CANON process on the 43rd d and 56th d, respectively. The mean particle diameter of R1 granular sludge increased to 214.79 &mu;m, and the eigenvalue (&Delta;NO<inf>3</inf><sup>-</sup>-N/&Delta;TN) was maintained at 0.128; whereas, the granular sludge size of R2 rose to 205.27 &mu;m with an eigenvalue maintained at 0.129. The nitrogen loading rate (NLR) was gradually increased in the low ammonia-nitrogen (90 mg&bull;L<sup>-1</sup>) wastewater within R1 and R2. This was more beneficial in R1, resulting in the persistent growth of CANON granular sludge and the enhancement of the systematic nitrogen removal rate (NRR). The average particle diameter of R1 rose to 507.46 &mu;m in 88 d, while NRR reached up to 0.277 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>. R2 granule sludge particle size was 467.72 &mu;m after 108 d of cultivation, and achieved a 0.243 kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>NRR, which was 87.73% of that in R1. During the course of steady operation, the specific anoxic/aerobic mode of R1 effectively suppressed NOB microbial activity, the eigenvalue remained around 0.127&plusmn;0.003, and the NRR of R1 was maintained at about (0.262&plusmn;0.019) kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup>. However, NOB was propagated observably in the continuously aerobic R2, whose eigenvalue rose to 0.136&plusmn;0.004, while NRR was merely (0.231&plusmn;0.015) kg&bull;(m<sup>3</sup>&bull;d)<sup>-1</sup> after 125 d of long-term operation. During the whole experiment period, the intermediate-setting aerated AUSB accelerated the formation of CANON granular sludge evolving from flocculent ANAMMOX sludge, and better nitrogen removal performance and operational stability were achieved.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Activated sludge process
Controlled terms:Ammonia - Eigenvalues and eigenfunctions - Granular materials - Granulation - Nitrogen removal - Particle size - Particles (particulate matter) - Wastewater treatment
Uncontrolled terms:AUSB - Granular sludge - Mean particle diameter - Microbial activities - Nitrogen removal rates - Operational stability - Particle diameters - Removal performance
Classification code:452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 802.3  Chemical Operations - 804.2  Inorganic Compounds - 951  Materials Science
Numerical data indexing:Mass_Density 9.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 8.77e+01%, Size 2.05e-04m, Size 2.15e-04m, Size 3.00e-01m, Size 4.68e-04m, Size 5.07e-04m
DOI:10.13227/j.hjkx.201708209

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 186>

Accession number:20183905856421
Title:Response of Soil Enzyme Activities and Their Relationships with Physicochemical Properties to Different Aged Coastal Reclamation Areas, Eastern China
Authors:Xie, Xue-Feng (1, 2); Pu, Li-Jie (1, 2); Wang, Qi-Qi (3); Zhu, Ming (1, 2); Wang, Xiao-Han (1, 2) 
Author affiliation:(1) School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing; 210023, China; (2) Key Laboratory of the Coastal Zone Exploitation and Protection of Ministry of Land and Resources, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing; 210023, China; (3) Geological Survey of Jiangsu Province, Nanjing; 210080, China 
Corresponding author:Pu, Li-Jie(ljpu@nju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1404-1412
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Land reclamation transforms a tidal flat from a marine ecosystem to terrestrial ecosystem, which significantly changes the soil ecosystem process, affecting the soil enzyme activities. Soil enzyme is involved in almost all soil biochemical processes. Clarifying the relationship between soil physicochemical properties and soil enzyme activities can reveal the changes of soil quality after reclamation and provide a theoretical basis for the scientific regulation of the soil ecosystem. In this study, a total of 72 soil samples were collected from a coastal reclamation area with different years of reclamation (0, 7, 32, 40, and 63 a) in Rudong County. The changes in soil physicochemical properties and enzyme activities within different reclamation years were analyzed by classical statistical analysis, and the relationship between soil enzyme activities and physicochemical properties was analyzed using a redundancy analysis. The results showed that longterm land reclamation had significant effects on soil physicochemical properties and enzyme activities. pH and electrical conductivity showed a decreasing trend after reclamation, while the content of soil organic carbon, total nitrogen, and total phosphorus showed a trend of "rapidly accumulate-gradually consume-accumulate again" with increasing years of reclamation. Compared with the bare flat area (0 a), amylase, dehydrogenase, and acid phosphatase activity initially increased and then decreased with increasing years of reclamation, while urease and alkaline phosphatase activities were characterized by an increase-decrease-increase trend. Meanwhile, the enzyme activities within different reclamation ages were basically higher in surface soil than deep layers. Redundancy analysis revealed that the soil physicochemical properties explained 69.8% of the variation in soil enzyme activities, and an obvious relationship existed between pH, electronic conductivity, soil organic carbon, total nitrogen, total phosphorus, and soil enzyme activities (P&lt;0.01). The order of importance of soil physicochemical properties to soil enzyme activities was as follows: total nitrogen&gt;soil organic carbon&gt;pH&gt;total phosphorus&gt;electronic conductivity.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:40
Main heading:Reclamation
Controlled terms:Alkalinity - Ecosystems - Electric conductivity - Land reclamation - Land use - Nitrogen - Organic carbon - Phosphatases - Phosphorus - Redundancy  - Soils
Uncontrolled terms:Acid phosphatase activities - Alkaline phosphatase activity - Electronic conductivity - Physicochemical property - Reclamation areas - Redundancy analysis - Soil enzyme activity - Soil physico-chemical properties
Classification code:403  Urban and Regional Planning and Development - 442.2  Land Reclamation - 454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 701.1  Electricity: Basic Concepts and Phenomena - 801.1  Chemistry, General - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Percentage 6.98e+01%
DOI:10.13227/j.hjkx.201707223

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 187>

Accession number:20183905856422
Title:Distribution, Sources, and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) in Soils of the Central and Eastern Areas of the Qinghai-Tibetan Plateau
Authors:Zhou, Wen-Wen (1, 2); Li, Jun (2); Hu, Jian (3); Zhu, Zhao-Zhou (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) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550002, China 
Corresponding author:Hu, Jian(hujian@vip.skleg.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:3
Issue date:March 15, 2018
Publication year:2018
Pages:1413-1420
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Fifty-five soil samples were collected across the central and eastern Qinghai-Tibetan Plateau during July to August in 2013. These were analyzed for the sixteen polycyclic aromatic hydrocarbons (PAHs) called out by the USA EPA. The concentration characteristics, sources, and potential ecological risk assessment of the sixteen PAHs in the soils were investigated. The soils were extracted by ultrasonic extraction, purified by an HLB solid-phase extraction column, and quantified by gas chromatography-mass spectrometry (GC-MS). The total PAH concentrations ranged from 40.47 to 1276.40 &mu;g&bull;kg<sup>-1</sup>, with a mean of 267.97 &mu;g&bull;kg<sup>-1</sup>. Low-ring PAHs (two and three rings PAHs) were dominant in all samples, and the proportion of phenanthrene was the highest. The sources of PAHs were assessed by diagnostic ratios and a principal component analysis (PCA), which indicated that the main sources of the PAHs originated from petroleum and biomass combustion. The toxic equivalent concentration (TEQ) concentration of benzopyrene-(a)-pyrene (TEQ<inf>BaP</inf>) in soils ranged from 3.73 to 79.32 &mu;g&bull;kg<sup>-1</sup>, with an average concentration of 12.84 &mu;g&bull;kg<sup>-1</sup>. The TEQ<inf>BaP</inf> in 4% of the soil samplings exceeded the Dutch target reference value (33.00 &mu;g&bull;kg<sup>-1</sup>), suggesting that a small portion of the soils in the Qinghai-Tibetan Plateau have potential ecological risk.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Polycyclic aromatic hydrocarbons
Controlled terms:Air purification - Aromatization - Column chromatography - Combustion - Ecology - Extraction - Gas chromatography - Hydrocarbons - Mass spectrometry - Mineral oils  - Petroleum analysis - Phase separation - Principal component analysis - Risk assessment - Soils
Uncontrolled terms:Ecological risk assessment - Gas chromatography-mass spectrometries (GC-MS) - Polycyclic aromatic hydrocarbons (PAHS) - Potential ecological risk - Qinghai-Tibetan plateau - Solid-phase extraction columns - Source - Ultrasonic extraction
Classification code:454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 513.3  Petroleum Products - 643  Space Heating, Ventilation and Air Conditioning - 801  Chemistry - 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:Percentage 4.00e+00%
DOI:10.13227/j.hjkx.201707207

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 188>

Accession number:20183905856855
Title:Mechanism of MgO/GAC Catalyzed Ozonation of Organic Compounds
Authors:Xu, Shan-Shan (1); Lin, Cun-Wang (1); Ding, Ya-Lei (1); Tong, Shao-Ping (1) 
Author affiliation:(1) State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou; 310032, China 
Corresponding author:Tong, Shao-Ping(sptong@zjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:838-843
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:MgO/granular activated carbon (MgO/GAC-1) was prepared via an impregnation method, and its activity in ozonation of diuron and acetic acid was investigated. MgO/GAC-1 was also compared in stability to the same catalyst prepared via precipitation according to the literature (MgO/GAC-2). The results showed that MgO/GAC-1 could increase efficiency of ozonation by 15%-35% in the process of degradation of diuron and acetic acid. When the pH of the solution was neutral or alkaline, MgO/GAC-1 could effectively retard the decrease in pH owing to formation of small molecular organic acids, thus ensuring the efficiency of ozone. When the pH of the solution was acidic, MgO/GAC-1 could increase the pH of the solution to a certain extent, thereby enhancing the efficiency of ozonation. The adjusting effect of pH value is the reason why MgO can significantly improve the efficiency of ozonation, a fact that was ignored in the relevant literature. Although MgO/GAC-1 had a larger specific surface area, MgO/GAC-1 had better activity in ozonation. A recycling test also indicated that MgO/GAC-1 had better stability, showing a good prospect for application.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Magnesia
Controlled terms:Acetic acid - Activated carbon - Alkalinity - Convergence of numerical methods - Efficiency - Herbicides - Ozone - Ozonization - pH - Urea
Uncontrolled terms:Catalyzed ozonation - Diuron - Effect of pH - Impregnation methods
Classification code:801.1  Chemistry, General - 802.2  Chemical Reactions - 804  Chemical Products Generally - 913.1  Production Engineering - 921.6  Numerical Methods
Numerical data indexing:Percentage 1.50e+01% to 3.50e+01%
DOI:10.13227/j.hjkx.201704082

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 189>

Accession number:20183805835624
Title:Migration and Transformation of Mercury in Unsubmerged Soil and Sediment at One Typical Forest Reservoir in Southwest China
Title of translation:&#35199;&#21335;&#22320;&#21306;&#20856;&#22411;&#26862;&#26519;&#27700;&#24211;&#22303;&#22756;&#21644;&#27785;&#31215;&#29289;&#27742;&#30340;&#36801;&#31227;&#36716;&#21270;&#29305;&#24449;
Authors:Sun, Tao (1); Ma, Ming (1); Wang, Yong-Min (1); An, Si-Wei (1); Wang, Ding-Yong (1, 2, 3) 
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Engineering Research Center for Agricultural Non-Point Source Pollution Control in the Three Gorges Reservoir Area, Chongqing; 400716, China; (3) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400716, China 
Corresponding author:Wang, Ding-Yong(dywang@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1880-1887
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Mercury (Hg) has been regarded as a global pollutant due to its volatility and toxicity. The sediment in the reservoirs or lakes is an important compartment for Hg methylation and it has also been considered as a sensitive area of Hg. In this study, a typical forest reservoir surrounding by evergreen broad-leaved forest in Chongqing of southwest China was selected to investigate the migration and transformation of Hg in unsubmerged soil and sediment. The unsubmerged soil and sediment were also replaced to each other to observe the dynamics of THg and TMeHg concentrations in equilibrium processes. The results were as follows: &#9312; The THg and TMeHg mean concentrations in Dahonghai reservoir water were (1.89&plusmn;0.72) ng&bull;L<sup>-1</sup>and (0.13&plusmn;0.04) ng&bull;L<sup>-1</sup>, respectively, which were lower than the first class water quality standards in environmental quality standard of China and other reservoirs or lakes, implying that this study area did not affect by Hg pollution. Meanwhile, the THg and TMeHg mean concentrations in unsubmerged soil and sediment were also lower than those in other reservoirs or lakes. &#9313; Seasonal variations of THg and TMeHg concentrations in reservoir water and soil were both observed higher in warm seasons, and more obvious variations occurred for TMeHg which probably influenced by meteorological parameters, such as, temperature and rainfall. &#9314;Compared with unsubmerged soil, the THg and TMeHg mean concentrations in sediment were both elevated, suggesting the sediment was an important sink of Hg. While, the sediment would be a source of Hg (especially TMeHg) with a high THg and TMeHg level. &#9315; The THg and TMeHg mean concentrations in unsubmerged soil and sediment after situ replacement were equilibrated with ambient soil in a short time (one or two months), implying the hydro-fluctuation belt of reservoir promoting the geochemical cycle of Hg.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:Lake pollution
Controlled terms:Alkylation - Forestry - Lakes - Mercury (metal) - Reservoirs (water) - Sediments - Soils - Water quality
Uncontrolled terms:Environmental quality standards - Equilibrium process - Evergreen broad-leaved forests - Geochemical cycles - Mean concentrations - Meteorological parameters - Seasonal variation - Water quality standard
Classification code:441.2  Reservoirs - 445.2  Water Analysis - 453  Water Pollution - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2  Chemical Reactions
DOI:10.13227/j.hjkx.201709051

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 190>

Accession number:20183805835621
Title:Characteristics of Iron Plaque and Its Heavy Metal Enrichment in Typical Mangrove Plants in Shenzhen Bay, China
Title of translation:&#28145;&#22323;&#28286;&#20856;&#22411;&#32418;&#26641;&#26893;&#29289;&#26681;&#34920;&#38081;&#33180;&#21450;&#20854;&#37325;&#37329;&#23646;&#23500;&#38598;&#29305;&#24449;
Authors:Shen, Xiao-Xue (1); Li, Rui-Li (1); Chai, Min-Wei (1); Qiu, Guo-Yu (1) 
Author affiliation:(1) School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen; 518055, China 
Corresponding author:Li, Rui-Li(liruili@pkusz.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1851-1860
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on the five typical mangrove species in the mangrove wetland of Shenzhen Bay, the contents and distributional characteristics of iron plaques (Fe) and the Mn, Pb, Zn, Cu, As, Cr, Cd, Ni, Co, and Sb enrichment of the iron plaques on mangrove plant roots were investigated. The results show that: &#9312; There is a significant difference in the contents of iron plaques among the five mangrove species, and the contents in the species follow the order: Acanthus ilicifolius &gt;Aeagiceras corniculatum &gt;Bruguiera gymnorrhiza &gt;Kandelia obovate &gt;Heritiera littorlis; the content ranged from 0.37 g&bull;kg<sup>-1</sup> to 10.81 g&bull;kg<sup>-1</sup>. &#9313; Iron plaques have a certain enrichment effect on the heavy metals in the sediments. The contents of heavy metals in the iron plaques vary with the plant species, being the highest in A. ilicifolius and the lowest in H. littorlis. This enrichment also varies with the element species: Mn content changed from 0.11 g&bull;kg<sup>-1</sup> to 2.67 g&bull;kg<sup>-1</sup>; the highest contents of Pb, Zn, Cu, As, and Cr changed from 117.44 mg&bull;kg<sup>-1</sup> to 189.69 mg&bull;kg<sup>-1</sup>; and the highest contents of Cd, Ni, Co. and Sb changed from 34.84 mg&bull;kg<sup>-1</sup> to 63.34 mg&bull;kg<sup>-1</sup>. The content of Zn in the iron plaque is negatively correlated with the other heavy metal contents (P&lt;0.001), indicating that Zn might compete with the other elements. &#9314; Sediment pH significantly affects the content of iron plaque and the accumulation of Mn in the iron plaque (P&lt;0.05). The water content and salinity of the sediments are positively correlated with the contents of heavy metals Cr and Co in the iron plaque (P&lt;0.05). &#9315; The distribution of iron plaques and their heavy metal contents in different parts of the roots of the mangrove plants follow the order: root tip&gt;root middle&gt;root base.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:48
Main heading:Iron
Controlled terms:Heavy metals - Plants (botany) - Sediments
Uncontrolled terms:Bruguiera Gymnorrhiza - Enrichment effects - Heavy metal contents - Heavy metal enrichments - Iron plaques - Mangrove plants - Mangrove species - Shenzhen Bay
Classification code:483  Soil Mechanics and Foundations - 531  Metallurgy and Metallography - 545.1  Iron
DOI:10.13227/j.hjkx.201708088

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 191>

Accession number:20183805835587
Title:Contamination Characterization and Human Exposure Levels to Polybrominated Diphenyl Ethers in Indoor and Outdoor Air in Industrial Park of Suzhou City
Title of translation:&#33487;&#24030;&#24037;&#19994;&#22253;&#21306;&#23460;&#20869;&#22806;&#39063;&#31890;&#29289;&#20013;&#22810;&#28340;&#32852;&#33519;&#37274;&#27745;&#26579;&#29305;&#24449;&#21450;&#20154;&#20307;&#26292;&#38706;&#27700;&#24179;
Authors:Wang, Jun-Xia (1, 2); Gu, Hai-Dong (2); Zhang, Zhan-En (1, 2); Qian, Fei-Yue (1) 
Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Jiangsu Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1544-1551
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Eight polybrominated diphenyl ether (PBDE) congeners in indoor and outdoor air particles were collected using higher-volume active sampling techniques from different functional areas, including an industrial workplace, office, domestic area, and scenic area in an industrial zone, in Suzhou city, and the samples were analyzed by GC-MS. The total concentration of PBDEs ranged from 9.22-64.15 pg&bull;m<sup>-3</sup> (average 20.93 pg&bull;m<sup>-3</sup>), and 1.06-8.44 pg&bull;m<sup>-3</sup>(average 5.11 pg&bull;m<sup>-3</sup>)in indoor and outdoor air, respectively. The results showed that the concentrations of PBDEs in indoor PM<inf>10</inf> was significantly higher than that in the outdoor PM<inf>10</inf>. The average concentrations of PBDEs in the air of the different sampling areas were in the order: industrial workplace&lt;office&lt;dwelling indoor&lt;outdoor air. Compared with the concentrations of PBDEs in the indoor and outdoor particulate matters from other regions, the concentrations of PBDEs in the indoor and outdoor atmospheric particles from Suzhou were at lower levels. BDE-209 was the most abundant (average 63% of the total PBDEs) in indoor and outdoor air, followed by BDE-99 and BDE-47.The estimated daily intake of PBDEs via inhalation was 3.75, 2.78, and 2.60 pg&bull;(kg&bull;d)<sup>-1</sup> by the workers in the workplace, workers in office, and toddlers, respectively. Results showed that inhalation exposure to PBDEs did not cause potential health risks in the local residents of Suzhou.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Organic pollutants
Controlled terms:Air intakes - Ethers - Health risks - Particles (particulate matter) - Polyacrylates
Uncontrolled terms:Estimated daily intakes - Indoor and outdoor - Indoor and outdoor airs - Inhalation exposure - Polybrominated diphenyl ether (PBDEs) - Polybrominated diphenyl ethers - Potential health risks - Suzhou
Classification code:461.7  Health Care - 631.1  Fluid Flow, General - 804.1  Organic Compounds - 815.1.1  Organic Polymers - 951  Materials Science
Numerical data indexing:Percentage 6.30e+01%
DOI:10.13227/j.hjkx.201708147

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 192>

Accession number:20183805835611
Title:Effects of Environmental Factors on the Synergy of Functional Bacteria in Completely Autotrophic Granular Sludge
Title of translation:&#29615;&#22659;&#22240;&#23376;&#23545;&#20840;&#33258;&#20859;&#33073;&#27694;&#39063;&#31890;&#27745;&#27877;&#21151;&#33021;&#33740;&#21327;&#21516;&#25928;&#24212;&#30340;&#24433;&#21709;
Authors:Chen, Xi (1); Qian, Fei-Yue (1, 2, 3); Wang, Jian-Fang (1, 2, 3); Gao, Jun-Jun (1); Shen, Yao-Liang (1, 2, 3); Jia, Xun (1) 
Author affiliation:(1) School of Environmental Science and Technology, 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 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:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1756-1762
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To obtain experimental evidences for optimizing a completely autotrophic nitrogen removal process based on granules, the effects of dissolved oxygen (DO) concentration, temperature (t), initial ammonium (NH<inf>4</inf><sup>+</sup>-N) concentration, and solution pH conditions on the synergy between the aerobic and anaerobic ammonium-oxidizing bacteria (AOB and AMX) were investigated using a single factor batch experiment, while the analysis of the microbial community structure within them was conducted using MiSeq high-throughput pyrosequencing. Results revealed that AOB (genus Nitrosomonas) and AMX (genus Candidatus Kuenenia) dominated in the granules, representing relative abundances of 32.9% and 9.8%, respectively. For the granules, the highest specific nitrogen removal rate of q(TN)=(17.7&plusmn;1.0) mg&bull;(g&bull;h)<sup>-1</sup>was obtained at a DO concentration of 2 mg&bull;L<sup>-1</sup>, while the initial NH<inf>4</inf><sup>+</sup>-N concentration was set at 100 mg&bull;L<sup>-1</sup>. And a lower DO level resulted in partial nitritation became the rate-limiting step of process, otherwise, it would be the ANAMMOX reaction instead. According to the free energy of the reactions, the activity of AMX was more sensitive to low temperature than that of AOB. When the reaction temperature was lower than 30&#8451;, nitrite accumulation could be observed in bulk liquid, with the significant decrease of q(TN) for the granules. Under the same oxygen supply conditions, an initial NH<inf>4</inf><sup>+</sup>-N concentration lower than 100 mg&bull;L<sup>-1</sup> could inhibit the activity of AMX partly. However, with an initial NH<inf>4</inf><sup>+</sup>-N concentration over 150 mg&bull;L<sup>-1</sup>, either oxygen-limiting or high free ammonia concentration could lead to the dramatic decrease of q(TN). In addition, the effective synergy of the two types of ammonium oxidizers in granules was always achieved at solution pH in the range of 7.0-8.5.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Dissolved oxygen
Controlled terms:Aerobic bacteria - Ammonia - Free energy - Granular materials - Granulation - Nitration - Nitrogen removal - Oxygen supply - Temperature - Wastewater treatment
Uncontrolled terms:ANAMMOX - Environmental factors - Granular sludge - Partial nitritation - Synergy effect
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461  Bioengineering and Biology - 641.1  Thermodynamics - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 951  Materials Science
Numerical data indexing:Mass_Density 1.00e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 1.50e-01kg/m3 to 2.20e-02kg/m3, Mass_Density 2.00e-03kg/m3 to 2.20e-02kg/m3, Percentage 3.29e+01%, Percentage 9.80e+00%
DOI:10.13227/j.hjkx.201708251

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 193>

Accession number:20183805835580
Title:Analysis of the Composition of Atmospheric Fine Particles (PM<inf>2.5</inf>) Produced by Burning Fireworks
Title of translation:&#28895;&#33457;&#29190;&#31481;&#38598;&#20013;&#29123;&#25918;&#30340;&#22823;&#27668;&#32454;&#39063;&#31890;&#29289;(PM<inf>2.5</inf>)&#25104;&#20998;&#22270;&#35889;
Authors:Xie, Rui-Jia (1); Hou, Hong-Xia (2); Chen, Yong-Shan (3) 
Author affiliation:(1) Environmental Monitoring Station of Quanzhou, Quanzhou; 362000, China; (2) Guangzhou Hexin Instrument Co., Ltd., Guangzhou; 510530, China; (3) School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou; 362000, China 
Corresponding author:Chen, Yong-Shan(yshchen421@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1484-1492
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Burning fireworks is one of the sources of atmospheric fine particles (PM<inf>2.5</inf>). The Chinese Spring Festival in Quanzhou City was taken as an example to study the effects of burning fireworks on the occurrence of PM<inf>2.5</inf>, and provide information on protection against air pollution caused by special pollution sources. The results showed that the concentrations of SO<inf>2</inf>, PM<inf>10</inf>, and PM<inf>2.5</inf> increased appreciably, and the concentration of PM<inf>2.5</inf> increased most significantly during the fireworks burning period. The peak daily average concentration in the urban area was about 4 times the annual average concentration in the urban area. The peak value of the hourly average concentration of PM<inf>2.5</inf> in the Tushan Street station was about 21 times the annual average concentration in the urban area. At the peak of the discharge, the ratios of the characteristic elements of fireworks, such as Al, Mg, Ba, Cu, and Sr, increased rapidly, and the hourly number concentrations of Al<sup>+</sup>, Mg<sup>+</sup>, Ba<sup>+</sup>, and Cu<sup>+</sup> were highly correlated. During the monitoring period, the main pollution sources of fine particles in Quanzhou City were fireworks and biomass burning, which accounted for more than half of the total particulate matter. The proportion of pollutants originating from coal-based and industrial process sources were relatively low, and both of them accounted for less than 10.0% of the particulate matter. The concentration of PM<inf>2.5</inf> was up to 0.578 mg&bull;m<sup>-3</sup> during the fireworks burning period, the rate of contribution by fireworks increased to 58.2%. Analysis of the pollution process showed that the changes in the concentration of PM<inf>2.5</inf> have a similar trend with the number concentration and the ratio of fireworks burning. The results indicated that the main reason of the deterioration of the atmospheric environment during the Chinese Spring Festival in Quanzhou is the centralized discharging of fireworks.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Particles (particulate matter)
Controlled terms:Air pollution - Deterioration - Explosives
Uncontrolled terms:Aerosol mass spectrometers - Atmospheric fine particles - Fireworks - Pollution sources - Quanzhou
Classification code:451  Air Pollution - 951  Materials Science
Numerical data indexing:Percentage 1.00e+01%, Percentage 5.82e+01%
DOI:10.13227/j.hjkx.201705153

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 194>

Accession number:20183805835577
Title:Simulation of the Spatio-temporally Resolved PM<inf>2.5</inf> Aerosol Mass Concentration over the Inland Plain of the Beijing-Tianjin-Hebei Region
Title of translation:&#20140;&#27941;&#20864;&#20869;&#38470;&#24179;&#21407;&#21306;PM<inf>2.5</inf>&#27987;&#24230;&#26102;&#31354;&#21464;&#21270;&#23450;&#37327;&#27169;&#25311;
Authors:Hao, Jing (1, 2); Sun, Cheng (1, 2); Guo, Xing-Yu (1, 2); Wang, Wei (1, 2); Liu, Fang-Tian (1, 2); Dang, Hai-Yan (1) 
Author affiliation:(1) College of Resources and Environment Sciences, Hebei Normal University, Shijiazhuang; 050024, China; (2) Key Laboratory of Environmental Evolvement and Ecological Construction of Hebei Province, Shijiazhuang; 050024, China 
Corresponding author:Wang, Wei(wangwei@hebtu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1455-1465
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In recent years, haze pollution in China is becoming increasingly serious, especially in the Beijing-Tianjin-Hebei region. In order to identify the temporal and spatial distributional characteristics of PM<inf>2.5</inf> aerosol mass concentration in the region, this study selected the inland plain of the Beijing-Tianjin-Hebei region as the research area, and used MODIS AOD as the main predictor in a mixed effects model to establish the daily relationship of AOD-PM<inf>2.5</inf> in the study area, from 2013 to 2014. The model was validated by a ten-fold cross validation method. The results showed that the correlation between AOD-PM<inf>2.5</inf> can be improved by daily calibration of the mixed effects model (R<sup>2</sup>=0.78); the cross-validated R<sup>2</sup> was 0.70, and RMSE and RPE were 20.80 &mu;g&bull;m<sup>-3</sup> and 28.76%, respectively. Considering the importance of unbiased PM<inf>2.5</inf> predictions, the correction factors calculated from the surface PM<inf>2.5</inf> measurements were applied to correct the biases in the predicted annual average PM<inf>2.5</inf> concentrations introduced by non-stochastic missing AOD measurements. The results showed that the annual average concentration of PM<inf>2.5</inf> in the study area was higher than 75 &mu;g&bull;m<sup>-3</sup>, and the spatial distribution of PM<inf>2.5</inf> concentration was higher in the southern and western regions, and lower in the northern and eastern regions. These results suggest that the mixed effects model can be used to monitor ground PM<inf>2.5</inf>, and also provide a scientific basis for the control of atmospheric particulate pollution in the region.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:Aerosols
Controlled terms:Pollution control - Stochastic systems
Uncontrolled terms:Aerosol optical depths - Beijing-tianjin-hebei regions - Cross-validation methods - Mixed effects models - PM2.5
Classification code:961  Systems Science
Numerical data indexing:Percentage 2.88e+01%
DOI:10.13227/j.hjkx.201706278

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 195>

Accession number:20183805835362
Title:Quantitative Relationship Between Paddy Soil Properties and Cadmium Content in Rice Grains
Title of translation:&#31291;&#30000;&#22303;&#22756;&#24615;&#36136;&#19982;&#31291;&#31859;&#38217;&#21547;&#37327;&#30340;&#23450;&#37327;&#20851;&#31995;
Authors:Wang, Meng-Meng (1); He, Meng-Yuan (1); Su, De-Chun (1) 
Author affiliation:(1) Beijing Key Laboratory of Farmland Pollution Prevention Control and Remediation, College of Resource and Environmental Sciences, China Agricultural University, Beijing; 100193, China 
Corresponding author:Su, De-Chun(dcsu@cau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1918-1925
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Rice is a crop with the potential for high accumulation of Cd, which can be affected by many factors. Sixty pairs of soil and rice samples from different plots were collected and analyzed, in order to understand the quantitative relationships between the Cd content in soil and the properties of soil and the Cd content in rice grains under field conditions, by simple and multiple regression analyses. The results showed that the Cd contents in soil and rice grains ranged from 0.15-2.54 mg&bull;kg<sup>-1</sup> and 0.02-2.00 mg&bull;kg<sup>-1</sup>, respectively. According to the result of simple regression analysis, there were significantly positive correlations (P&lt;0.01) between the Cd contents in soil and rice grains (r=0.392); the pH, SOM, and CEC in soil also had certain effects on Cd accumulation in rice grains, which were not significant, however. When the soil pH was&lt;6.5, the Cd content in rice grains increased with increasing soil pH, but decreased with increasing soil pH when the soil pH was&gt;6.5. The Cd content, pH, SOM, and CEC in the soil and the Cd content in rice grains were analyzed by multiple regression analysis, and five equations, which all reached extremely significant levels (P&lt;0.01), were obtained. The equation that included the four variables (Cd content, pH, SOM, and CEC in soil) had the most r, and it could predict the Cd content in rice grains better, given the conditions of the present study.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:44
Main heading:Grain (agricultural product)
Controlled terms:Cadmium - Regression analysis - Soils
Uncontrolled terms:Cd accumulation - Correlation analysis - Field conditions - Multiple regression analysis - Positive correlations - Quantitative relationship - Simple regression analysis - Soil property
Classification code:483.1  Soils and Soil Mechanics - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4  Agricultural Products - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201709039

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 196>

Accession number:20183805835586
Title:Analysis of Sources, Pollution Characteristics, and Human Exposure to Atmospheric New Halogenated Flame Retardants in Selected Areas
Title of translation:&#20856;&#22411;&#22320;&#21306;&#22823;&#27668;&#26032;&#22411;&#21348;&#20195;&#38459;&#29123;&#21058;&#27745;&#26579;&#29305;&#24449;, &#26469;&#28304;&#20998;&#26512;&#21450;&#20154;&#20307;&#26292;&#38706;
Authors:Li, Qi-Lu (1, 2); Yang, Kong (1); Li, Jun (2); Zhang, Gan (2) 
Author affiliation:(1) Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China; (2) State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1537-1543
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Atmospheric gaseous and particle samples were collected using high-volume active samplers in Guangzhou and Wuzhishan. Concentrations of all the eight selected new halogenated flame retardants (NHFRs), including syn-DP, anti-DP, TBPH, PBEB, HBB, TBE, TBB, and DBDPE, were measured. The mean &sum;NHFR concentration was significantly higher in Guangzhou (335 pg&bull;m<sup>-3</sup>) than in Wuzhishan (90.6 pg&bull;m<sup>-3</sup>). DBDPE was the most abundant component in Guangzhou, accounting for 66.9% of the &sum;NHFR concentration, while TBPH was the major component (65.8%) in Wuzhishan. This indicates different pollution characteristics in Guangzhou and Wuzhishan. In addition, &sum;NHFR concentration presented distinct seasonal variations only in Guangzhou, which could result from the different sources of origin of NHFRs. Principle component analysis showed that the atmospheric NHFRs in Guangzhou and Wuzhishan could originate from different sources. In the light of the results of wind frequency and HYSPLIT model analysis, NHFRs seem to originate mainly from the emissions from surrounding areas, including from the inputs of e-waste recycling, industrial activities, and re-volatilization of consumer goods in Guangzhou, while NHFRs mainly seem to originate from the movement of air mass over the Pearl River Delta and the seas in Wuzhishan. Meanwhile, several NHFRs presented different loading patterns in Guangzhou and Wuzhishan, and the emissions from different sources and commercial products could be the impactors. With detection of high NHFR concentrations in the atmosphere of Guangzhou, the long-time exposure of the surrounding residents (especially infants) is suspected to cause potential health risk.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Principal component analysis
Controlled terms:Earth atmosphere - Electronic Waste - Flame retardants - Halogenation - Health risks - Industrial emissions - River pollution - Vaporization
Uncontrolled terms:Commercial products - Halogenated flame retardant - Industrial activities - Inhalation exposure - Potential health risks - Principle component analysis - Seasonal variation - Source analysis
Classification code:443.1  Atmospheric Properties - 451.1  Air Pollution Sources - 453  Water Pollution - 461.7  Health Care - 802.2  Chemical Reactions - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 6.58e+01%, Percentage 6.69e+01%
DOI:10.13227/j.hjkx.201708186

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 197>

Accession number:20183805835591
Title:CH<inf>4</inf> Fluxes During the Algal Bloom in the Pengxi River
Title of translation:&#19977;&#23777;&#28558;&#28330;&#27827;&#27700;&#21326;&#26399;&#38388;&#27700;&#20307;CH<inf>4</inf>&#27987;&#24230;&#21450;&#20854;&#36890;&#37327;&#21464;&#21270;&#29305;&#24449;&#21021;&#25506;
Authors:Qin, Yu (1); Zhang, Yu-Yang (1); Li, Zhe (2); Ma, Jian-Rong (2) 
Author affiliation:(1) Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing; 400074, China; (2) Kay Laboratory of Reservoir Environment, Chongqing Institute of Green and Intelligence Technology, Chinese Academy of Sciences, Chongqing; 400714, China 
Corresponding author:Li, Zhe(lizhe@cigit.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1578-1588
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Emissions of greenhouse gases in the Three Gorges Reservoir have been attracting attention in the recent years. This study was conducted to reveal the CH<inf>4</inf> emission and removal during the process of algal growth at different nitrogen and phosphorus concentrations in the Pengxi River in the Three Gorges Reservoir. In-situ field experiments were conducted in the Gaoyang Lake in Pengxi River. From April 22nd, 2016, to May 9th, 2016, different concentrations of nitrogen and phosphorus were added to different experimental chambers. Results showed that CH<inf>4</inf> emission decreased sharply from the first day of the experiment to the sixth day, and after that, CH<inf>4</inf> emission in the water samples with only added phosphorus were obviously recovered compared to the other treatment. In this experiment, algal biomass was influenced by different concentrations of N and P. The biomass of algae were not affected by N, but were promoted under suitable concentration of P, such as 1P, 10P, 1NP, and 10NP. When the P concentration was too high, the biomass of algae was also limited. The emission and removal of CH<inf>4</inf> in the experiment were significantly related to the addition of NO<inf>3</inf><sup>-</sup>-N.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:45
Main heading:Rivers
Controlled terms:Algae - Biomass - Greenhouse gases - Nitrogen - Nitrogen removal - Phosphorus - Reservoirs (water)
Uncontrolled terms:Algal biomass - Algal blooms - Algal growth - CH4 flux - Field experiment - Nitrogen and phosphorus - Three gorges reservoir - Water samples
Classification code:441.2  Reservoirs - 451.1  Air Pollution Sources - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201706044

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 198>

Accession number:20183805835617
Title:Effects of Reclamation on Soil Nutrients and Microbial Activities in the Huixian Karst Wetland in Guilin
Title of translation:&#22438;&#27542;&#23545;&#26690;&#26519;&#20250;&#20185;&#21888;&#26031;&#29305;&#28287;&#22320;&#22303;&#22756;&#20859;&#20998;&#19982;&#24494;&#29983;&#29289;&#27963;&#24615;&#30340;&#24433;&#21709;
Authors:Huang, Ke-Chao (1); Shen, Yu-Yi (2); Xu, Guang-Ping (1); Huang, Yu-Qing (1); Zhang, De-Nan (1); Sun, Ying-Jie (1); Li, Yan-Qiong (1); He, Wen (1); Zhou, Long-Wu (1) 
Author affiliation:(1) 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; (2) 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:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1813-1823
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the effect of reclamation on soil quality in the Huixian Karst Wetland, samples from different soil levels were collected from marsh wetland, reclaimed paddy field, and reclaimed dry farmland, for analyzing soil nutrient (carbon, nitrogen, phosphorous, and potassium) contents, microbial biomass carbon/nitrogen (MBC/MBN), and microbial activity indicators [i.e. basal respiration (BR), potential respiration (PR), microbial quotient (qMB), and metabolic quotient (qCO<inf>2</inf>)]. The correlations between the soil nutrient contents and soil microbial activity indictors were examined. The results showed that: &#9312;Artificial reclamation led to the trend of slight acidity in the soil and a marked loss in soil nutrients, while, the pH value, soil water content (SWC), and the contents of soil organic carbon (SOC), total nitrogen (TN), available nitrogen (AN), total phosphorus (TP), available phosphorus (AP), total potassium (TK), and available potassium (AK) decreased with reclamation. &#9313;Among all the microbes, bacteria were the most numerous, followed by actinomycetes, and fungi were the least numerous. The microbial quantity decreased with the increase in the soil depth on the whole. The proportion of bacteria and actinomycetes were much higher in the paddy field, and that of fungi was the highest in the dry farmland. &#9314; In total, protease, sucrase, urease, catalase, and polyphenol oxidase activities decreased with the increasing of soil depths. Soil reclamation reduced the soil enzyme activities. &#9315;qCO<inf>2</inf> decreased after an initial increase in the marsh wetland, while it rose gradually in the reclaimed paddy field and reclaimed dry farmland. The contents of MBC, MBN, BR, PR, and qMB were the highest in the marsh wetland, followed by those in the reclaimed paddy field, with the lowest contents occurring in the reclaimed dry farmland. The trend of qCO<inf>2</inf> contents in the 0-10 cm and 10-20 cm soil layers followed the order of marsh wetland&gt;paddy field&gt;dry farmland, but in the 20-30 cm and 30-40 cm soil layers, it showed the order dry farmland&gt;paddy field&gt;marsh wetland. The continuation of reclamation resulted in the decrease in soil microbial activity, and soil quality as well, especially in the dry farmland. Meanwhile, we should reduce the areas of paddy fields and dry farmlands under reclamation during the process of wetland ecological restoration in future. Conversion of farmlands to wetlands or lakes, to improve and increase the size of wetland ecosystems of nearby lands, should be done gradually.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Reclamation
Controlled terms:Bacteria - Ecology - Farms - Forestry - Fungi - Land reclamation - Nitrogen - Nutrients - Organic carbon - Phosphorus  - Potassium - Soil conditioners - Soil moisture - Wetlands
Uncontrolled terms:Available phosphorus - Ecological restoration - Microbial activities - Microbial biomass carbon - Soil enzyme activity - Soil layer - Soil microbial activities - Soil physico-chemical properties
Classification code:442.2  Land Reclamation - 454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 549.1  Alkali Metals - 804  Chemical Products Generally - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Size 0.00e+00m to 1.00e-01m, Size 1.00e-01m to 2.00e-01m, Size 2.00e-01m to 3.00e-01m, Size 3.00e-01m to 4.00e-01m
DOI:10.13227/j.hjkx.201707196

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 199>

Accession number:20183805835620
Title:Soil Degradation-Associated Microbial Community Structure Changes in an Alpine Meadow Under Tibetan Pig Herding
Title of translation:&#34255;&#29482;&#25200;&#21160;&#20316;&#29992;&#19979;&#30340;&#39640;&#23506;&#33609;&#30008;&#22303;&#22756;&#36864;&#21270;&#29305;&#24449;&#21450;&#24494;&#29983;&#29289;&#32676;&#33853;&#32467;&#26500;&#21464;&#21270;
Authors:Zhan, Peng-Fei (1); Xiao, De-Rong (1); Yan, Peng-Fei (1); Liu, Zhen-Ya (1); Ma, Jin-Cheng (2); Chen, Zhi-Ming (2); Ge, Rong (2); Tian, Wei (2); Wang, Hang (1, 3) 
Author affiliation:(1) National Plateau Wetlands Research Center/College of Wetlands, Southwest Forestry University, Kunming; 650224, China; (2) Napa Lake Wetland Management Bureau in Shangrila City, Diqing; 674400, China; (3) Institute for Environment Science, College of Environment &amp; Resource Science, Zhejiang University, Hangzhou; 310058, China 
Corresponding author:Wang, Hang(hwang17@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1840-1850
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Anthropic activities lead to a high risk of peatland degradation in the alpine regions. Along with the declined plant productivity and the impaired functioning of the soil carbon sink, the diversity and structure of soil microbial communities are also affected in a degraded peatland ecosystem. Tibetan pig herding is a unique peatland management strategy, which can significantly affect the peatland ecosystem, but it has been rarely studied. The changes in the microbial community structure and its responses to disturbances were studied using a 16S rRNA high throughput sequencing technique in an alpine meadow peatland under Tibetan pig herding disturbance and under control (without Tibetan pig herding) in the Northwestern Yunnan province. The results showed that Tibetan pig herding significantly reduced the &alpha; diversity of soil microbes, and the soil microbial community structures were significantly changed by pig herding. The soil microbial communities in the peatland soils were dominated by Proteobacteria, Acidobacteria, and Chloroflexi. Compared with those at the phylum level, the changes at the genus level under pig disturbance were more obvious. It was seen that the relative abundances of Sphingomonas and Hymenobacter significantly increased, while the abundances of Nitrospira and Rhodoplanes significantly decreased under pig herding. Venn diagram analysis revealed that there were 71 and 136 core OTUs in the soil under pig herding and in the control group soil, respectively. Burkholderiales, Pseudomonadales, and Sphingomonadales were the main taxa exclusively found under Tibetan pig herding, and could serve as indicators of soil disturbance. CCA ordination further showed that the distribution of Nitrospira and Rhodoplanes were mainly controlled by soil moisture, available phosphorus, and organic matter contents. Our findings provide an insight into the linkages between the soil microbial communities and the degradation of peatlands in alpine regions.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:44
Main heading:Mammals
Controlled terms:Ecosystems - Microorganisms - Moisture control - RNA - Soil moisture - Wetlands
Uncontrolled terms:16S rRNA - Alpine meadow - Herding - Peatland - Soil micro-organisms - Tibetans
Classification code:454.3  Ecology and Ecosystems - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 483.1  Soils and Soil Mechanics - 731.3  Specific Variables Control
DOI:10.13227/j.hjkx.201708225

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 200>

Accession number:20183805835615
Title:Degradation Characteristics and Metabolic Pathway of a Pyrene-Degrading Pseudomonas aeruginosa Strain
Title of translation:1&#26666;&#38108;&#32511;&#20551;&#21333;&#32990;&#33740;&#23545;&#33432;&#30340;&#38477;&#35299;&#29305;&#24615;&#21450;&#20195;&#35874;&#36884;&#24452;
Authors:Li, Xiang (1); Zhang, Xue-Ying (1); Zhou, Jun (2); Song, Jun (3); Wang, Jian-Gang (4); Yong, Xiao-Yu (2); Jia, Hong-Hua (2) 
Author affiliation:(1) College of Environment, Nanjing Tech University, Nanjing; 211816, China; (2) College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing; 211816, China; (3) College of Chemical Engineering, Nanjing Tech University, Nanjing; 211816, China; (4) Chengdu Hydrogeology and Engineering Geology Team, Sichuan Bureau of Geology &amp; Mineral Resources, Chengdu; 610072, China 
Corresponding author:Zhou, Jun(zhoujun@njtech.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:4
Issue date:April 15, 2018
Publication year:2018
Pages:1794-1803
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Polycyclic aromatic hydrocarbons (PAHs) pose a potential threat to ecosystems due to their mutagenic, carcinogenic, and teratogenic effects. Microbial degradation has been suggested as the best way to remove PAHs from contaminated environments. Screening of bacterial strains capable of efficiently degrading PAHs is the key to the bio-remediation technique. With the method of enrichment culture, the bacterial strain LX2, which can use pyrene as the sole carbon source, was isolated from sludge contaminated with PAHs. The strain was identified as Pseudomonas aeruginosa (Pseudomonas sp. LX2) according to the results of the analyses of its morphology, physiology, and phylogeny of its 16S rDNA sequence. The degradation rate of pyrene by Pseudomonas sp. LX2 was 32.1% after 21 days of cultivation at an initial pyrene concentration of 50 mg&bull;L<sup>-1</sup>. Pyrene, 4,5-dihydro-, 2'-Hydroxypropiophenone, Phenol, and Protocatechuate were identified as the major metabolites by GC/MS analysis. Based on the identified metabolites, it was concluded that pyrene was degraded via two different routes by Pseudomonas aeruginosa, namely the 'naphthalene' and the 'phthalic acid' routes.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:47
Main heading:Pyrene
Controlled terms:Bacteria - Biodegradation - Carboxylic acids - Chemical analysis - Degradation - Metabolism - Metabolites - Naphthalene - Remediation
Uncontrolled terms:Contaminated environment - Degradation characteristics - Metabolic pathways - Microbial degradation - Phthalic acid - Polycyclic aromatic hydrocarbons (PAHS) - Pseudomonas aeruginosa - Sole carbon source
Classification code:454.2  Environmental Impact and Protection - 461.8  Biotechnology - 802.2  Chemical Reactions - 804.1  Organic Compounds
Numerical data indexing:Age 5.75e-02yr, Mass_Density 5.00e-02kg/m3 to 2.20e-02kg/m3, Percentage 3.21e+01%
DOI:10.13227/j.hjkx.201708243

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 201>

Accession number:20183905856861
Title:Microbial Communities and Sludge Specific Resistance in Two SBRs Treating Leachate
Authors:Cai, Li-Yun (1); Huang, Ze-Bin (1); Xu, Zi-Wei (1); Jiang, Zhi-Bin (1); Lin, Li-Li (1); Huang, Yu (1) 
Author affiliation:(1) Fujian Key University Laboratory of Estuarine Ecological Security and Environmental Health, School of Environmental Science and Engineering of Xiamen University TanKah Kee College, Zhangzhou; 363105, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:2
Issue date:February 15, 2018
Publication year:2018
Pages:880-888
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The relationship between microbial populations and sludge filtration performance was studied when active sludge was used to treat the leachate from municipal solid waste incineration plants. Two SBRs (SBR1 and SBR2) were operated at the same conditions, except that SBR1 was exposed to the sunlight and SBR2 was in the dark. To identify the difference in microbial populations in two reactors, high-throughput sequencing method was used. On the 50<sup>th</sup> day, the fungi abundance in SBR2 was higher than in SBR1. Phylum Rozellomycota became the dominant fungi in SBR1, whose relative abundance was 83.71%. Phylum Basidiomycota and Genus Trichosporon became only dominant fungi in SBR2, whose relative abundances were 99.84% and 99.78%, respectively. Bacterial abundance in SBR1 was higher than in SBR2. In SBR1, Thauera was the major bacterial genus, whose relative abundance was 39.35%. In SBR2, Planktosalinus, Thauera, and Ottowia were the major bacterial genera, whose relative abundances were 16.84%, 16.23%, and 12.55%. Rotifers and other predatory metazoan were detected on the 30<sup>th</sup>-50<sup>th</sup> days in SBR1 and sludge specific resistance began to decline on the 35<sup>th</sup> day. Filamentous fungi bulking caused by Trichosporon resulted in a continuous increase in sludge specific resistance of SBR2. The dominant microbial communities (especially fungi) and sludge specific resistances in SBR1 and SBR2 were very different because of the effect of sunlight. Therefore, sunlight plays an important role on microbial communities and sludge characteristics.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Waste incineration
Controlled terms:Filtration - Fungi - Microorganisms - Municipal solid waste
Uncontrolled terms:Filtration performance - High-throughput sequencing - Leachates - Microbial communities - Microbial populations - Sludge characteristics - Specific resistances - Sunlight
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 452.4  Industrial Wastes Treatment and Disposal - 461.9  Biology - 802.3  Chemical Operations
Numerical data indexing:Percentage 1.26e+01%, Percentage 1.62e+01%, Percentage 1.68e+01%, Percentage 3.94e+01%, Percentage 8.37e+01%, Percentage 9.98e+01%
DOI:10.13227/j.hjkx.201707202

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 202>

Accession number:20184205947401
Title:Effects of Vegetation Restoration on Soil Nitrogen Pathways in a Karst Region of Southwest China
Authors:Yang, Yi (1, 2, 3); Ouyang, Yun-Dong (4); Chen, Hao (1, 2); Xiao, Kong-Cao (1, 2); Li, De-Jun (1, 2) 
Author affiliation:(1) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) Huanjiang Experimental Station of Karst Ecosystem, Chinese Academy of Sciences, Huanjiang; 547200, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Shaoyang No.2 Middle School, Shaoyang; 422000, China 
Corresponding author:Chen, Hao(chenhao10902@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2845-2852
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Nitrogen (N) is an important element for plant growth in terrestrial ecosystems. Studying soil N cycling is crucial for understanding the structures and functions of an ecosystem. However, our knowledge of soil N dynamics in karst regions is still limited. In addition, while China's karst regions have conducted a series of vegetation restoration projects, the vegetation restoration effects on soil N pathways are still largely unknown. Therefore, this study selected four typical ecosystems representing four main vegetation restoration stages (i. e., cropland, grassland, shrubland, and forest) in a karst region in Huanjiang Province, southwest China. In these ecosystems, soil N pathways, including net ammonization rate (net ammonization, fungal ammonization, and bacterial ammonization), net nitrification rate (i. e., net nitrification, heterotrophic nitrification, autotrophic nitrification, fungal nitrification, and bacterial nitrification), net N mineralization rate (net N mineralization, fungal mineralization, and bacterial mineralization), and soil properties were measured. Our results showed that nitrification rate was high in all ecosystems, but the ammonization rate was low, resulting in nitrite being the main inorganic N form in karst soil. Autotrophic and heterotrophic nitrification rates accounted for 80% and 20% of the net nitrification rate, respectively. After the addition of fungal and bacterial inhibitors, ammonization rates increased for all treatments, but the nitrification rates decreased. Following vegetation restoration, soil N mineralization and nitrification rates all increased, but the ammonization rates significantly decreased. This pattern was significantly correlated with soil organic carbon, total nitrogen, nitrate, microbial biomass, and the activity of N-acquisition enzymes in these ecosystems. Our findings provide very useful information for understanding soil N cycling in the karst regions.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Nitrification
Controlled terms:Ecosystems - Fungi - Landforms - Mineralogy - Organic carbon - Restoration - Soils - Vegetation
Uncontrolled terms:Heterotrophic nitrification - Karst - Nitrogen mineralization - Nitrogen transformations - Vegetation restoration
Classification code:454.3  Ecology and Ecosystems - 481.1  Geology - 482  Mineralogy - 483.1  Soils and Soil Mechanics - 802.2  Chemical Reactions - 804.1  Organic Compounds
Numerical data indexing:Percentage 2.00e+01%, Percentage 8.00e+01%
DOI:10.13227/j.hjkx.201710066

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 203>

Accession number:20184205947383
Title:Effects of Nutrient Addition on the Growth and Competition of Bloom Forming Cyanobacterium Chrysosporum ovalisporum: An In-situ Experiment
Authors:Wang, Meng-Meng (1, 2, 3); Zhang, Wei (1, 2, 3); Zhang, Jun-Yi (4); Shang, Guang-Xia (1, 2, 3); Du, Cai-Li (1, 2, 3); Wang, Li-Qing (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; (4) Wuxi Environmental Monitoring Centre Station, Wuxi; 214023, China 
Corresponding author:Zhang, Wei(weizhang@shou.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2698-2705
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:An in-situ mesocosm experiment was conducted to study the growth dynamic of Chrysosporum ovalisporum and the other phytoplankton organisms under accelerated eutrophication conditions by using 39 buckets (100 L) in Lake Dishui, Shanghai. The results showed that the growth of both filamentous cyanobacteria (C. ovalisporum) and green algae were promoted with nutrient enrichment. The increase in the algal biomass rate in N plus P addition treatments was significantly higher than in treatments with N or P alone (P&lt;0.05). Although the increasing biomass rate with P addition alone was higher than with N alone, there was no statistically significant difference (P&gt;0.05). The relevant abundance of C. ovalisporum showed a significantly decreasing trend with N addition treatments and N plus P additions treatments (P&lt;0.05), although it was slightly increased with the treatments with P alone (P&gt;0.05). Nutrient addition could significantly improve the growth of small sized algae organisms (Chroococcus spp., Coelastrum spp., Chlorella spp., Tetraedron spp., and Scenedesmus spp.) rather than C. ovalisporum in all treatments (P&lt;0.05). The small sized green algae overcoming C. ovalisporum indicated that small sized algae were more favored by hyper-eutrophicated, high water temperature and relatively undisturbed conditions. This is because small sized algal organisms have higher metabolic and growth rates compared to other sized algae, especially in stationary water regimens and high, light density conditions. We foresee that the small sized algae, Chlorophyte, dominating the small hyper-eutrophic aquatic system may be a potential succession pattern in the high water temperature seasons.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Algae
Controlled terms:Eutrophication - High temperature effects - Nutrients - Temperature
Uncontrolled terms:Chlorophytes - Chrysosporum ovalisporum - Cyanobacterial blooms - Growth and competition - In-situ experiments - Mesocosms - Nutrient enrichments - Statistically significant difference
Classification code:641.1  Thermodynamics - 931.2  Physical Properties of Gases, Liquids and Solids
Numerical data indexing:Volume 1.00e-01m3
DOI:10.13227/j.hjkx.201711020

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 204>

Accession number:20184205948071
Title:Nutrient Distribution Characteristics of the Sediment-water System in the Xiangxi River During the Impoundment of TGR
Authors:Su, Qing-Qing (1, 2); Liu, De-Fu (3); Ji, Dao-Bin (1, 2); Song, Lin-Xu (1, 2); Cui, Yu-Jie (1, 2); Li, Xin (1, 2); Chen, Xiu-Xiu (4); Liu, Xin-Yuan (1, 2) 
Author affiliation:(1) College of Hydraulic &amp; Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, Three Gorges University, Yichang; 443002, China; (3) Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, Hubei University of Technology, Wuhan; 430068, China; (4) Water Authority of Xuanzhou District, Xuancheng; 242000, China 
Corresponding author:Liu, De-Fu(dfliu@189.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2135-2144
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study characterizes the nutrient distribution of the sediment-water system in the Xiangxi River (XXR) during the impoundment of the Three Gorges Reservoir (TGR). In 2016, the research group obtained samples in the Xiangxi River, analyzed the distribution of nitrogen, phosphorus, and O.M. (organic matter) in the sediment-water system, explored the characteristics of "source-sink" between the interstitial water and overlying water, and carried out a cluster analysis for the sampling sites. The results showed that &rho;(TN) in the sediments was higher than in the estuary, and the &rho;(TN) was close to that in the middle and downstream samples of the river. The &rho;(TP) in the upstream sample was the highest of all sites, &rho;(O.M.) presented low distribution characteristics in the downstream, and the maximum value of &rho;(O.M.) exceeded the critical point (1.5%) within a depth of 10 cm, and there was a certain risk of release. For the distribution in the overlying water, &rho;(DTN) and &rho;(DTP) were the largest in the estuary, &rho;(DTN) decreased from the estuary to the upstream, and &rho;(DTP) did not change along the river. During the study, DTN, NH<inf>4</inf><sup>+</sup>-N, and DTP in all sites (except CJ point) were released as nutrients to the overlaying water as the "source," but some points for NO<inf>3</inf><sup>-</sup>-N and PO<inf>4</inf><sup>3-</sup>-P presented as "sources," and some of them presented as "sinks." The "source-sink" process of nitrogen was stronger than that of phosphorus. This was due to the difference between the oxidation environment at the bottom of the XXR and the stream flow backward depth of the Xiangxi bay during impoundment. Based on the results of a cluster analysis, the characteristics of CJ, 1, and 2 indicated similar sediment-water systems, while the characteristics of 3 and 4 were similar.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Rivers
Controlled terms:Cluster analysis - Estuaries - Nitrogen - Nutrients - Phosphorus - Reservoirs (water) - Sediments - Stream flow - Waterworks
Uncontrolled terms:Impoundment period - Nitrogen and phosphorus - Sediment-water system - Three gorges reservoir - Xiangxi rivers
Classification code:407.2  Waterways - 441.2  Reservoirs - 446  Waterworks - 483  Soil Mechanics and Foundations - 723  Computer Software, Data Handling and Applications - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.50e+00%, Size 1.00e-01m
DOI:10.13227/j.hjkx.201708166

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 205>

Accession number:20184205947374
Title:Assessment of Physico-chemical Properties and Phosphorus Fraction Distribution Characteristics in Sediments after Impounding of the Three Gorges Reservoir to 175 m
Authors:Pan, Chan-Juan (1, 2, 3); Li, Rui (2, 3); Tang, Xian-Qiang (2, 3, 4); Xia, Zhen-Yao (1, 4); Li, Qing-Yun (2, 3); Yang, Wen-Jun (2, 3, 4); Xu, Wen-Nian (1, 4) 
Author affiliation:(1) College of Civil Engineering &amp; Architecture, China Three Gorges University, Yichang; 443002, China; (2) Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Wuhan; 430010, China; (3) Key Laboratory of Basin Water Resource and Eco-environmental Science in Hubei Province, Changjiang River Scientific Research Institute, Wuhan; 430010, China; (4) Collaborative Innovation Center for Geo-Hazards and Eco-Environment in Three Gorges Area, Yichang; 443002, China 
Corresponding author:Tang, Xian-Qiang(ckyshj@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2615-2623
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to understand the characteristics of the distribution of sediment total phosphorus (TP) and phosphorus fractions in the mainstream sediments in the Three Gorges Reservoir (TGR) after impounding the water level to 175 m, 13 surface sediment samples were collected from the Wujiang to Maoping sections in October 2010. The physico-chemical properties, including organic matter content, particle grain size distribution, and major mineral analysis, as well as total phosphorus and its fractions in the sediment, were determined. Moreover, the relationships among phosphorus fractions, organic matter contents, and particle grain size were discussed, and the effect of the impoundment on sediment phosphorus accumulation and bioavailability was also evaluated. Results indicated that the sediment organic matter content of the TGR was between 7.79 g&bull;kg<sup>-1</sup> and 55.63 g&bull;kg<sup>-1</sup>, and the main mineral components were chlorite, illite, and quartz. The sediments were dominated with clayey silt with a median diameter (d<inf>50</inf>) ranging from 3.84 &mu;m to 23.65 &mu;m. The measured total phosphorus content of the sediments were between 557.06 g&bull;kg<sup>-1</sup> and 837.92 g&bull;kg<sup>-1</sup>, and the total phosphorus enrichment index of each sampling site is greater than 1, demonstrating a potential risk for phosphorus pollution. The calcium bound phosphorus (Ca-P) and the reductant soluble phosphorus (Oc-P) were the dominant sediment phosphorus fractions, while the exchangeable phosphorus (Ex-P), the iron bound phosphorus (Fe-P), and aluminum bound phosphorus (Al-P) content were relatively low. Bioavailable P only accounts for 2%-8% of the total phosphorus content. When referring to previous studies, the sediment particle size tended to be smaller and the content of comparatively easy-to-weather minerals slightly increased with the increase of the impoundment water level. However, the increase in the impoundment water level did not result in a significant increase tendency in sediment TP content. In the future, a reduction in sediment input and a decline in sediment particle size may facilitate the accumulation of phosphorus in the sediments in the broad valley section of the TGR. Moreover, large scale dry-wet alternation in the water level fluctuation zone and resuspension of floating mud near the dam both potentially impact the bioavailability of phosphorus in the sediments.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:49
Main heading:Phosphorus
Controlled terms:Aluminum compounds - Biogeochemistry - Biological materials - Calcium compounds - Chemical analysis - Chemical properties - Grain size and shape - Iron compounds - Minerals - Organic compounds  - Particle size - Particle size analysis - Reservoirs (water) - Risk assessment - Sediments - Water levels
Uncontrolled terms:Grain size - Grain size distribution - Organic matter content - Phosphorus fractions - Physicochemical property - Sediment organic matters - Three gorges reservoir - Water-level-fluctuation zones
Classification code:441.2  Reservoirs - 461.2  Biological Materials and Tissue Engineering - 482.2  Minerals - 483  Soil Mechanics and Foundations - 801  Chemistry - 801.2  Biochemistry - 804  Chemical Products Generally - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention - 951  Materials Science
Numerical data indexing:Percentage 2.00e+00% to 8.00e+00%, Size 1.75e+02m, Size 3.84e-06m to 2.36e-05m
DOI:10.13227/j.hjkx.201708175

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 206>

Accession number:20184205948053
Title:Chemical Characterization, Spatial Distribution, and Source Identification of Organic Matter in PM<inf>2.5</inf> in summertime Shanghai, China
Authors:Gao, Ya-Qin (1, 2); Wang, Hong-Li (1, 2); Jing, Sheng-Ao (2); Qiao, Li-Ping (2); Li, Li (2); Zhu, Shu-Hui (2); Lou, Sheng-Rong (2); Tao, Shi-Kang (2); Feng, Jia-Liang (3); Li, Xiang (1, 2); Chen, Chang-Hong (2) 
Author affiliation:(1) Department of Environment Science and Engineering, Fudan University, Shanghai; 200433, China; (2) State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Complex, Shanghai Academy of Environmental Sciences, Shanghai; 200233, China; (3) School of Environmental and Chemical Engineering, Shanghai University, Shanghai; 200444, China 
Corresponding author:Wang, Hong-Li(wanghl@saes.sh.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:1978-1986
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Particulate organic matter (POM) has attracted increasing attention recently due to its great contribution to fine particles (PM<inf>2.5</inf>) and complex components and sources. In the present study, 78 particulate organic compounds in PM<inf>2.5</inf> were quantified at three sites in Shanghai during summer; these sites were located in urban (Xuhui), suburban (Qingpu), and coastal (Lin'gang) areas of the city. Accordingly, the chemical composition and spatial distribution were investigated and sources were explored based on the indicators and diagnostic ratios combined with backward trajectory. The results showed that during the period of observation, the quantified organic matter in the suburban area is about 319 ng&bull;m<sup>-3</sup>, close to the urban area but much higher than that of the coastal areas. Fatty acids were the largest contributors, followed by levoglucosan, polycyclic aromatic hydrocarbons (PAHs), n-alkanes, and hopanes. Source analysis based on tracer methods indicates that gasoline vehicle emissions were the main source of POM in Shanghai. Biomass burning from the northeast impacted somewhat on the urban area and western suburbs during the observation period. Terrestrial plant emissions played an important role in the source of fatty acids at Qingpu and Lin'gang, and emissions of marine phytoplankton and microorganisms were also important for fatty acids at Lin'gang. Coal combustion and motor vehicle exhaust made an important contribution to PAHs according to an analysis of diagnostic ratios. This study presented the characteristics and sources of POM in summertime Shanghai, which facilitates the development of an effective control strategy on PM<inf>2.5</inf> pollution.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Particles (particulate matter)
Controlled terms:Biogeochemistry - Biological materials - Chemical analysis - Coal combustion - Fatty acids - Indicators (chemical) - Marine biology - Paraffins - Phytoplankton - Pollution control  - Polycyclic aromatic hydrocarbons - Spatial distribution - Urban growth
Uncontrolled terms:Chemical compositions - Particulate organic matters - Shanghai - Source analysis - Space differences
Classification code:403.1  Urban Planning and Development - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 801  Chemistry - 801.2  Biochemistry - 804  Chemical Products Generally - 804.1  Organic Compounds - 921  Mathematics - 951  Materials Science
DOI:10.13227/j.hjkx.201708197

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 207>

Accession number:20184205947837
Title:Socio-economic Factors Influencing the Spatial Distribution of PM<inf>2.5</inf> Concentrations in China: An Exploratory Analysis
Authors:Duan, Jie-Xiong (1); Zhai, Wei-Xin (1); Cheng, Cheng-Qi (2); Chen, Bo (2) 
Author affiliation:(1) Institute of Remote Sensing and GIS, Peking University, Beijing; 100871, China; (2) College of Engineering, Peking University, Beijing; 100871, China 
Corresponding author:Cheng, Cheng-Qi(ccq@pku.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2498-2504
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In recent years, the PM<inf>2.5</inf> pollution in China has become a top environmental and health concern, involving the characterization of healthy effects over a broad spatial area with uneven geographical distribution. This research aims to explore the influential factors for the PM<inf>2.5</inf> distribution from a socio-economic perspective, based on the observations from China's 1497 monitoring sites in 2015. First, the Moran's I index and the local indicators of spatial association (LISA) were computed to outline the distribution of PM<inf>2.5</inf> on a national scale using provincial-level divisions. Second, the correlation between the spatial distribution of PM<inf>2.5</inf> and socio-economic factors were analyzed by ordinary least squares (OLS) and geo-weighted regression (GWR) models. The results indicated that the GWR model explained the causal relationships better. Generally, Beijing, Tianjin, and Hebei had peak levels of PM<inf>2.5,</inf> while Guangxi, Sichuan, and several other southern provinces had the lowest levels. Particularly, forest coverage rate and electricity consumption per capita were negatively correlated with the concentration of PM<inf>2.5</inf>. In this study, the vehicle ownership per capita proved to be the most significant factor that positively contributed to the concentration.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Spatial distribution
Controlled terms:Economics - Geographical distribution - Spatial variables measurement
Uncontrolled terms:PM2.5 - Socio economies - Spatial autocorrelations - Spatial regression - Spatial statistics
Classification code:405.3  Surveying - 921  Mathematics - 943.2  Mechanical Variables Measurements - 971  Social Sciences
DOI:10.13227/j.hjkx.201709087

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 208>

Accession number:20184205948078
Title:Degradation of OG with Peroxymonosulfate Activated by a MnFe<inf>2</inf>O<inf>4</inf>-graphene Hybrid
Authors:Xia, Wen-Jun (1); Liu, Feng (1); Hao, Shang-Bin (1); Huang, Tian-Yin (1); Wang, Zhong-Ming (2); Chen, Jia-Bin (1) 
Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Changzhou Municipal Enginerring Design Research College Co., Ltd., Changzhou; 213003, China 
Corresponding author:Chen, Jia-Bin(chenjiabincn@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2202-2210
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The rG-MnFe<inf>2</inf>O<inf>4</inf> was synthesized by hydrothermal method and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and Raman spectra. The rG-MnFe<inf>2</inf>O<inf>4</inf> was used to activate peroxymonosulfate (PMS) to decolorize azo dyes, e.g., Orange G, and the effect of PMS dosage, rG-MnFe<inf>2</inf>O<inf>4</inf> loadings, initial pH, and the concentration of Cl<sup>-</sup> were investigated. The results indicated that the degradation rate of OG was 100% within 27 min with 0.3 g&bull;L<sup>-1</sup> of rG-MnFe<inf>2</inf>O<inf>4</inf> and at a 40:1 of PMS:OG molar ratio. The decolorization efficiency of OG increased with increasing PMS concentration and increasing rG-MnFe<inf>2</inf>O<inf>4</inf> dosage. The initial pH had a significant effect on OG degradation, and pH 5.00 was most favorable for its decolorization. In addition, the addition of Cl<sup>-</sup> accelerated the decolorization of OG, and the decolorization rate increased with increasing concentration of Cl<sup>-</sup>. The rG-MnFe<inf>2</inf>O<inf>4</inf> also exhibited an excellent reusability, and its activation of PMS was still observed after five rounds of tests. From the analysis of UV-vis spectra and gas chromatography-mass spectrometry (GC/MS), the naphthalene ring and azo band were found to be destroyed, with p-nitrophenol and phthalic acid as the main degradation products. Finally, a TOC analysis indicated that a certain degree of OG mineralization was obtained in the rG-MnFe<inf>2</inf>O<inf>4</inf>/PMS system.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:Photodegradation
Controlled terms:Azo dyes - Citrus fruits - Degradation - Fourier transform infrared spectroscopy - Gas chromatography - Graphene - High resolution transmission electron microscopy - Mass spectrometry - Naphthalene - pH effects  - Reusability - Transmission electron microscopy
Uncontrolled terms:Activator - Degradation products - Fourier transform infra red (FTIR) spectroscopy - Gas chromatography-mass spectrometry - Hydrothermal methods - Manganese ferrites - Orange G - Peroxymonosulfate
Classification code:741.3  Optical Devices and Systems - 761  Nanotechnology - 801  Chemistry - 801.1  Chemistry, General - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 821.4  Agricultural Products
Numerical data indexing:Mass_Density 3.00e-01kg/m3 to 2.20e-02kg/m3, Percentage 1.00e+02%, Time 1.62e+03s
DOI:10.13227/j.hjkx.201709162

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 209>

Accession number:20184205947829
Title:Denitrification Characteristics and Community Structure of Aerobic Denitrifiers from Lake and Reservoir Sediments
Authors:Kang, Peng-Liang (1); Zhang, Hai-Han (1); Huang, Ting-Lin (1); Chen, Sheng-Nan (1); Shang, Pan-Lu (1); Feng, Ji (1); Jia, Jing-Yu (1) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China 
Corresponding author:Zhang, Hai-Han(zhanghaihan@xauat.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2431-2437
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effect of aerobic denitrifying bacteria is a hot topic in the field of water environment bioremediation. Aerobic denitrifier communities, H-30, X-10, and C-30, enriched by intermittent aeration, screened with screening culture media, and treated by ultrasonic waves, could perform high denitrification performance at the higher dissolved oxygen concentration of (7.2&plusmn;0.6) mg&bull;L<sup>-1</sup>. The total nitrogen (TN) removal rate of aerobic denitrifier communities, H-30, X-10, and C-30, reached 83.04%, 83.40%, and 82.68%, respectively. There is lower nitrite accumulation during the process of denitrification. Illumina high-throughput DNA sequencing revealed that aerobic denitrifier compositions were significantly different among the three communities. The predominant strains of aerobic denitrifier communities, H-30, X-10, and C-30, were Bacillus subtilis, Paracoccus pantotrophus, and Pseudomonas stutzeri, respectively. The proportion of P. stutzeri in aerobic denitrifier communities H-30 and X-10 was almost the same, while Pseudomonas xiamenensis was only detected in H-30. These three efficient aerobic denitrifier communities provide a bacterium source guarantee for polluted water bioremediation of lakes and reservoirs in cities.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Denitrification
Controlled terms:Aerobic bacteria - Bacteriology - Bioremediation - Biotechnology - Dissolved oxygen - DNA sequences - Gene encoding - Lakes - Nitration - Nitrogen removal  - Oxic sediments - Reservoirs (water) - Throughput - Water pollution
Uncontrolled terms:Aerobic denitrifier - Community structures - Denitrifying bacteria - Dissolved oxygen concentrations - High throughput - Intermittent aeration - Nitrite accumulation - Reservoir sediments
Classification code:441.2  Reservoirs - 453  Water Pollution - 454.2  Environmental Impact and Protection - 461  Bioengineering and Biology - 483  Soil Mechanics and Foundations - 802.2  Chemical Reactions
Numerical data indexing:Percentage 8.27e+01%, Percentage 8.30e+01%, Percentage 8.34e+01%
DOI:10.13227/j.hjkx.201710229

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 210>

Accession number:20184205947402
Title:Identifying the Origins and Spatial Distributions of Heavy Metals in the Soils of the Jiangsu Coast
Authors:L&uuml;, Jian-Shu (1, 2, 3); He, Hua-Chun (2) 
Author affiliation:(1) College of Geography and Environment, Shandong Normal University, Ji'nan; 250014, China; (2) Key Laboratory of Coast and Island Development of Ministry of Education, Nanjing University, Nanjing; 210023, China; (3) State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai; 200062, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2853-2864
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A total of 239 samples of surface soils were collected along the Xiangshui to Rudong coast, in Jiangsu Province, and analyzed for Cd, Cr, Cu, Hg, Ni, Pb, and Zn. A multivariate analysis was applied to identify the sources of heavy metals, and ordinary kriging was used to map the spatial distributions of the heavy metal concentration. The mean contents of Cd, Cu, Hg, Pb, and Zn in the surface soils of the Jiangsu Coastal Zone were higher than the background values of the Jiangsu Coastal Plain, which indicated that there were obvious accumulations of these heavy metals in surface soils; while the mean contents of Cr and Ni were lower than the background values. The contents of Cd, Cr, Cu, Pb, Ni, and Zn in soils that originated from marine deposition were significantly lower than those from alluvium and lagoon facies deposition, including the Yangtze River Delta deposition. Urban areas exhibited higher Cd, Cu, Hg, Pb, and Zn contents than other land covers. Cr and Ni were controlled by the parent material and seemed to originate from a natural source. Cd, Cu, Pb, and Zn were associated with the combination of parent material and anthropogenic inputs. Hg was dominated by atmospheric deposition related to various human activities. The high values of Cd, Cu, Pb, and Zn were distributed in the northern, western, and southern parts of the study area, and Hg exhibited high values around the urban areas in the western and southern parts.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:57
Main heading:Spatial distribution
Controlled terms:Coastal zones - Deposition - Heavy metals - Meteorological problems - Multivariant analysis - Soils
Uncontrolled terms:Anthropogenic inputs - Atmospheric depositions - Background value - Heavy metal concentration - Human activities - Multi variate analysis - Source - Yangtze river delta
Classification code:443.1  Atmospheric Properties - 471  Marine Science and Oceanography - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 802.3  Chemical Operations - 921  Mathematics - 922  Statistical Methods
DOI:10.13227/j.hjkx.201707219

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 211>

Accession number:20184205947397
Title:Effects of Elevated Tetracycline Concentrations on Aerobic Composting of Human Feces: Composting Behavior and Microbial Community Succession
Authors:Shi, Hong-Lei (1); Wang, Xiao-Chang (1); Li, Qian (1); Liu, Yuan (2) 
Author affiliation:(1) Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Huajiang Construction Company Limited of China Construction First Group, Beijing; 100161, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2810-2818
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to investigate the effect of antibiotics on composting behavior, enzymatic activity, and microbial community succession during the aerobic composting of human feces using sawdust as the bulk carrier, tetracycline (TC) was added to the composting system at four different concentrations (0, 100, 250, and 500 mg&bull;kg<sup>-1</sup>). Microbial community succession was examined by high-throughput 16S rRNA gene sequencing. The results showed that the influence of TC on the physical and chemical properties of compost was related to its concentration. With the increase in TC concentration, the temperature increase during aerobic composting was inhibited, the water-soluble carbon (WSC) residue was increased, the germination index (GI) was decreased, and the dehydrogenase activity (DHA) was also hindered. Parameters, such as temperature, WSC, GI, and DHA, are widely accepted and representative indicators to evaluate compost maturity. Overall, when the concentration of TC was higher than 500 mg&bull;kg<sup>-1</sup>, the aerobic composting process and the maturity of the final compost were inhibited. Furthermore, elevated TC caused significant changes in microbial community succession and reductions in community diversity and abundance. Therefore, interference in microbial community structures and a hindrance to biological activity are believed to be the main adverse effects of TC on the composting process and maturity of the composting products.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:40
Main heading:Composting
Controlled terms:Bioactivity - Microorganisms - RNA
Uncontrolled terms:Aerobic composting - Compost maturity - Human feces - Microbial communities - Tetracycline
Classification code:461  Bioengineering and Biology
DOI:10.13227/j.hjkx.201711043

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 212>

Accession number:20184205947381
Title:Spatiotemporal Succession Characteristics of Algal Functional Groups and Its Impact Factors for a Typical Channel-Type Reservoir in a Southwest Mountainous Area
Authors:Zhang, Yao-Wen (1); Li, Hong (2); Li, Jia (1); Song, Yang (1); Zhang, Ling-Lei (1); Li, Yong (1); Pu, Xun-Chi (1); Huang, Wen-Dian (1) 
Author affiliation:(1) State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu; 610065, China; (2) Sichuan Province Zipingpu Development Company Limited, Chengdu; 610037, China 
Corresponding author:Zhang, Ling-Lei(zhanglinglei@hotmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2680-2687
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to explore the spatial and temporal variations of algal functional groups in the Zipingpu reservoir, a typical channel-type reservoir in the southwest mountainous area of China, water samples were collected from eight sections of the Zipingpu reservoir from April 2016 to March 2017.A total of 21 algal functional groups were identified as B, C, D, F, G, H<inf>1</inf>, J, L<inf>0</inf>, L<inf>M</inf>, M<inf>P</inf>, N, P, S<inf>2</inf>, T, W<inf>1</inf>, W<inf>2</inf>, X<inf>1</inf>, X<inf>2</inf>, X<inf>3</inf>, Y, and Z. Based on the analysis of the dominant degree (y&gt;0.02), the algal functional groups were dominated by W<inf>2</inf>, Y, L<inf>0</inf>, W<inf>1</inf>, M<inf>P</inf>, and B. The C-R-S strategy of algal growth in the Zipingpu reservoir showed that R-type was a more dominant type than the S- and C-type for the majority of the time. Peridinium (group L<inf>0</inf>, type S) was the significant algae in the Zipingpu reservoir algal bloom event in June 2016.Redundancy analysis (RDA) was used to explore the relationship between algal functional groups and environmental factors. The results showed that algal density, chlorophyll a, water temperature, and biochemical oxygen demand were the major factors influencing the spatiotemporal succession of algal functional groups across the eight sampling sections, with water temperature having the highest influence.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:27
Main heading:Reservoirs (water)
Controlled terms:Biochemical oxygen demand - Functional groups - Temperature
Uncontrolled terms:Algal - Environmental factors - Growth strategy - Major factors - Mountainous area - Spatial and temporal variation - Spatiotemporal succession - Water temperatures
Classification code:441.2  Reservoirs - 641.1  Thermodynamics - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201709163

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 213>

Accession number:20184205948101
Title:Carbon Metabolism Characteristics of the Karst Soil Microbial Community for Pb-Zn Mine Tailings
Authors:Fang, Jun-Jia (1, 2, 3); Li, Qiang (2, 3); Liu, Chang (2, 3); Jin, Zhen-Jiang (4); Liang, Yue-Ming (2, 3); Huang, Bing-Hui (2, 3, 4); Lu, Xiao-Xuan (1, 2, 3); Peng, Wen-Jie (2, 3, 4) 
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 Land and Resources &amp; Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (3) International Research Center on Karst under the Auspices of UNESCO, Guilin; 541004, China; (4) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541006, China 
Corresponding author:Li, Qiang(glqiangli@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2420-2430
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:BIOLOG and 18S rRNA PCR-DGGE methods were used to estimate the characteristics of carbon source metabolism of the soil microbial community as well as the relationship between soil fungi and soil organic carbon in different karst land use types (corn field, citrus field, and paddy field) contaminated by Pb-Zn tailings at Sidi Village, Yangshuo, Guangxi Zhuang Autonomous Region, SW China. It was found that the concentrations of Pb, Zn, Cu, and Cd were highest in the paddy field, followed by the corn field, citrus field, and control group (dry field). In addition, the geo-accumulation index indicated that the heavy metal pollution at this area was caused by Pb and Cd and that Cd was the key environmental risk factor. With the Pb-Zn tailings, there was low microbial biomass carbon, biological entropy, and microbial carbon source metabolism in the soil samples. The highest soil organic carbon and heavy metal concentrations were found in the paddy field, followed by the corn field and citrus field. According to the DDGE results, it was found that Pycnoporus sp. ZW02.30 was found in control group soils, Fusarium solani and Fusarium oxysporum were found in the corn field and citrus field, and Penicillium decumbens was found in citrus field. These were involved in the degradation of sugars, such as starch, cellulose, hemicellulose, and lignin. However, the fungi were not found in the paddy field. Based on the low functional diversity of the soil microbial community and biological entropy as well as the high soil organic carbon concentration in the paddy field, it was concluded that soil microbial carbohydrate metabolism and the mineralization rate of the soil organic carbon was controlled by soil microorganisms, especially fungi, in different land use soils in the karst area contaminated by Pb-Zn tailings.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:46
Main heading:Soil pollution
Controlled terms:Binary alloys - Cadmium - Cellulose - Electrophoresis - Entropy - Fungi - Land use - Landforms - Lead alloys - Metabolism  - Microorganisms - Organic carbon - Physiology - Polymerase chain reaction - RNA - Soils - Tailings - Zinc alloys
Uncontrolled terms:BIOLOG - Gradient gel electrophoresis - Land use type - Lead-zinc tailing - Soil micro-organisms
Classification code:403  Urban and Regional Planning and Development - 452.3  Industrial Wastes - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 481.1  Geology - 483.1  Soils and Soil Mechanics - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 641.1  Thermodynamics - 801  Chemistry - 804.1  Organic Compounds - 811.3  Cellulose, Lignin and Derivatives
DOI:10.13227/j.hjkx.201709093

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 214>

Accession number:20184205948090
Title:Characteristics of N<inf>2</inf>O Release and Influencing Factors in Grass-type and Algae-type Zones of Taihu Lake During Summer
Authors:Zheng, Xiao-Lan (1, 2); Wen, Shuai-Long (1, 2); Li, Xin (1, 3); Gong, Wan-Qing (1, 2); Liu, De-Hong (1, 4); Zhong, Ji-Cheng (1) 
Author affiliation:(1) University of Chinese Academy of Sciences, Beijing; 100049, China; (2) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Lakes, Chinese Academy of Sciences, Nanjing; 210008, China; (3) College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215000, China; (4) School of Geography Science, Nanjing Normal University, Nanjing; 210023, China 
Corresponding author:Zhong, Ji-Cheng(jczhong@niglas.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2306-2315
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Spatial heterogeneity of N<inf>2</inf>O generation and emissions in multi-ecotype lakes limited the accurate estimation of the N<inf>2</inf>O fluxes in lakes, but few studies on the characteristics of N<inf>2</inf>O generation and emissions have been conducted. In this study, N<inf>2</inf>O flux at the water-gas interface, dissolved N<inf>2</inf>O concentration in the water column, and N<inf>2</inf>O flux at the sediment-water interface in typical grass-type and algal-type zones of Taihu Lake were analyzed during summer, and indoor micro-environment experiments were conducted to illustrate the main factors affecting the generation and emissions of N<inf>2</inf>O. The results showed that the N<inf>2</inf>O fluxes at the water-gas interface, dissolved N<inf>2</inf>O concentration, and N<inf>2</inf>O fluxes at the sediment-water interface of the emergent macrophyte type area was higher than the algae-type area and submerged macrophyte area during the summer., with N<inf>2</inf>O fluxes at the water-gas interface of (115.807&plusmn;7.583), (79.768&plusmn;1.842), and (3.685&plusmn;0.295) &mu;mol&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>, respectively. The dissolved N<inf>2</inf>O concentration in the water column were (0.051&plusmn;0), (0.029&plusmn;0.001), and (0.018&plusmn;0) &mu;mol&bull;L<sup>-1</sup>, respectively; and the N<inf>2</inf>O fluxes at the sediment-water interface were (178.275&plusmn;3.666), (160.685&plusmn;0.642), and (75.665&plusmn;1.016) &mu;mol&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>, respectively. The spatial difference could be attributed to dominant plants and the concentration of inorganic nitrogen in the water column. The results of micro-environment experiments showed that nitrate and organic carbon sources could significantly increase the N<inf>2</inf>O production potential of sediments, the high concentration of NH<inf>4</inf><sup>+</sup>-N in the water column might inhibit the N<inf>2</inf>O production in sediments, and the production rates of N<inf>2</inf>O in the sediment increased remarkably when the incubation temperature increased, suggesting that the generation and emissions of N<inf>2</inf>O were mainly restricted by nitrate, organic carbon, and temperature in summer.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Phase interfaces
Controlled terms:Algae - Dissolution - Gas emissions - Gas plants - Lakes - Nitrates - Organic carbon - Sediments
Uncontrolled terms:Aquatic plants - Influencing factors - Sediment water interface - Taihu lakes - Water gas
Classification code:483  Soil Mechanics and Foundations - 522  Gas Fuels - 801.4  Physical Chemistry - 802.3  Chemical Operations - 804.1  Organic Compounds - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201709212

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 215>

Accession number:20184205948081
Title:Pollution Characteristics of Organophosphorus Flame Retardants in a Wastewater Treatment Plant
Authors:Sun, Jia-Wei (1); Ding, Wei-Nan (1); Zhang, Zhan-En (1); Wang, Jun-Xia (1); Gu, Hai-Dong (1) 
Author affiliation:(1) Department of Environmental Science and Engineering, Suzhou University of Science and Technolgy, Suzhou; 215009, China 
Corresponding author:Zhang, Zhan-En(zhanenzhang@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2230-2238
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sewage water, the influent of the secondary sedimentation tanks, the final effluent, sludge from biological pools, and dewatered excess sludge samples from eight wastewater treatment plants (WWPTs) in Suzhou, including those from seven A<sup>2</sup>/O processes and one oxidation ditch process, were collected in 2017 to study the pollution characteristics of organophosphorus flame retardants (OPFRs) in WWPTs. Accelerated solvent extraction (ASE) combined with a solid-phase extraction method was used to detect the concentration of 10 organic phosphorus flame retardant (OPFRs). The removal efficiency of OPFRs was compared and final daily emissions were estimated. The results showed seven kinds of OPFRs were detected in the influent, final effluent, and sludge. The total content of OPFRs in the influent ranged from 0.74 to 222.65 &mu;g&bull;L<sup>-1</sup> (average 65.56 &mu;g&bull;L<sup>-1</sup>), while the content in the final effluent was between 0.46 and 175.41 &mu;g&bull;L<sup>-1</sup> (average 22.99 &mu;g&bull;L<sup>-1</sup>). The concentration in the effluent of the secondary sedimentation tank was between 0.48 and 178.14 &mu;g&bull;L<sup>-1</sup> (average 43.14 &mu;g&bull;L<sup>-1</sup>). The daily emission of OPFRs in final effluent was 36.69-2 177.12 g&bull;d<sup>-1</sup>. The content in the dewatered excess sludge was between 89.32 and 596.24 &mu;g&bull;g<sup>-1</sup> dw (average 249.35 &mu;g&bull;g<sup>-1</sup> dw), the minimum daily emission was 3.57-7.15 kg&bull;d<sup>-1</sup>, and the maximum was 47.70-95.40 kg&bull;d<sup>-1</sup>. The oxidation ditch process has a good removal rate of OPFRs, at 92%, while the A<sup>2</sup>/O process removal rate covered a large range from 11%-99%. Three chlorinated OPFRs, TCEP, TCPP, and TDCPP, were the main components in the influent and final effluent, mainly because of the large consumption of OPFRs and also because the removal rate by the traditional wastewater treatment technology was low.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:39
Main heading:Effluents
Controlled terms:Biological sewage treatment - Biological water treatment - Dewatering - Effluent treatment - Flame retardants - Oxidation - Phase separation - Reclamation - Settling tanks - Sewage  - Sewage lagoons - Sewage pumping plants - Solvent extraction - Toxicity - Wastewater treatment - Water pollution - Water treatment plants
Uncontrolled terms:Accelerated solvent extraction - A^2/O - Organophosphorus flame retardants - Oxidation ditch - Secondary sedimentation tanks - Solid phase extraction method - Wastewater treatment plants - Wastewater treatment technologies
Classification code:445.1  Water Treatment Techniques - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 453  Water Pollution - 461.7  Health Care - 802.2  Chemical Reactions - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals
Numerical data indexing:Mass_Density 2.30e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 4.31e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 4.60e-07kg/m3 to 1.75e-04kg/m3, Mass_Density 4.80e-07kg/m3 to 1.78e-04kg/m3, Mass_Density 6.56e-05kg/m3 to 2.20e-02kg/m3, Mass_Density 7.40e-07kg/m3 to 2.23e-04kg/m3, Percentage 1.10e+01% to 9.90e+01%, Percentage 9.20e+01%
DOI:10.13227/j.hjkx.201709103

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 216>

Accession number:20184205947391
Title:Nitrifying Bacteria Culture in Entrapment Immobilization
Authors:Yang, Hong (1); Hu, Yin-Long (1) 
Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing; 100124, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2763-2769
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to realize the industrialization of nitrifying bacteria enrichment cultivation and large-scale application of entrapment immobilization, activated sludge from a sewage treatment plant was used as the seed sludge. The concentration of substrate was increased progressively in an industrialized tank. Nitrifying bacteria were grown rapidly by controlling the concentration of FA and FNA, and the ammonia oxidation rate reached 118 mg&bull;(L&bull;h)<sup>-1</sup> eventually. The results of high-throughput sequencing showed that Nitrosomonas, nitrifying bacteria, was only 0.53% of the bacteria. After exposing it to an enrichment culture, the content of Nitrosomonas rose to 10.27%, 20 times larger than that in the raw sludge. Diversity was significantly smaller at the same time. After embedding immobilization with PVA (polyvinyl alcohol), the embedded fillers nitrification load was 30%. A continuous-flow approach was utilized in the recovery phase, and the nitrification loading rate reached a high level, 62 mg&bull;(L&bull;h)<sup>-1</sup>, and efficient recovery of the biologically active fillers was achieved.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Nitrification
Controlled terms:Activated sludge process - Ammonia - Bacteria - Fillers - Seed - Sewage treatment plants - Throughput
Uncontrolled terms:Activated sludge - Ammonia oxidation - Continuous flows - Enrichment culture - High-throughput sequencing - Large-scale applications - Nitrifying bacteria - Recovery phase
Classification code:452.2  Sewage Treatment - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 821.4  Agricultural Products
Numerical data indexing:Percentage 1.03e+01%, Percentage 3.00e+01%, Percentage 5.30e-01%
DOI:10.13227/j.hjkx.201710099

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 217>

Accession number:20184205947833
Title:Screening and Identification of Arsenic-resistant Endophytic Bacteria from Different Rice Tissues (Oryza sativa L.) in Different Growth Stages
Authors:Wang, Bo-Xun (1, 2); Wang, Xue-Dong (1); Duan, Gui-Lan (2) 
Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Department of Soil Environmental Science, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China 
Corresponding author:Wang, Xue-Dong(wangxuedong9801@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2464-2471
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Soil microorganisms are critical for arsenic transport and transformation in the soil-plant system. Endophytes are a very rich microbial resource, but to date no study has reported the responses of endophytes to arsenic pollution. In this study, the cultivable endophytic bacteria were isolated from the root, stem, leaf, and panicle of rice (Oryza sativa L. cv. Yongyou-538) at the seedling stage, tillering stage, flowering stage, and productive stage. All isolates were first screened by 1 mmol&bull;L<sup>-1</sup>arsenite [As(&#8546;)] and 10 mmol&bull;L<sup>-1</sup>arsenate [As(&#8548;)], and further screened by 2 mmol&bull;L<sup>-1</sup> As(&#8546;) and 20 mmol&bull;L<sup>-1</sup> As(&#8548;). From this study, a total of 126 strains of rice endophytes were obtained, belonging to 13 genera. Among them, 37 strains (8 genus) were isolated from the rice seedling stage, 25 strains (5 genus) were isolated from the rice tillering stage, 24 strains (8 genus) from the rice flowering stage, and 30 strains (8 genus) from the rice productive stage. The dominant genera were Bacillus sp., Psoudomonas sp., and Acinetobacter sp. After twice screening, 20 strains were found to be resistant to 1 mmol&bull;L<sup>-1</sup> As(&#8546;) and 10 mmol&bull;L<sup>-1</sup> As(&#8548;), including 16 strains that were resistant to 2 mmol&bull;L<sup>-1</sup> As(&#8546;) and 13 strains were resistant to 20 mmol&bull;L<sup>-1</sup> As(&#8548;). Importantly, the strain CS1 was found to be the most resistant bacteria to both As(&#8546;) and As(&#8548;) among all the isolated strains.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Bacteria
Controlled terms:Arsenic - Bacteriology
Uncontrolled terms:16s rDNA - Arsenic resistance - Different growth stages - Endophytic bacteria - Resistant bacteria - Rice - Soil micro-organisms - Transport and transformation
Classification code:804  Chemical Products Generally
DOI:10.13227/j.hjkx.201709184

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 218>

Accession number:20184205947380
Title:Spatial-Temporal Variations of CO<inf>2</inf> and CH<inf>4</inf> Flux Through a Water-air Interface Under the Effect of Primary Productivity in Wulixia Reservoir
Authors:Peng, Wen-Jie (1, 2); Li, Qiang (2, 3); Song, Ang (2, 3); Jin, Zhen-Jiang (1) 
Author affiliation:(1) College of Environmental Science and Engineering, Guilin University of Technology, Guilin; 541004, China; (2) Key Laboratory of Karst Dynamics, Ministry of Land and Resources &amp; Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (3) International Research Centre on Karst under the Auspices of UNESCO, Guilin; 541004, China 
Corresponding author:Li, Qiang(glqiangli@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2673-2679
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In recent years, the effect of greenhouse gas has been a focus. In order to reveal the spatial-temporal variations of CO<inf>2</inf> and CH<inf>4</inf> flux through a water-air interface, Wulixia reservoir was selected as a typical case for measuring CO<inf>2</inf>and CH<inf>4</inf> flux using a floating chamber during four study periods in 2016.The primary productivity of the water was also studied. The results indicate that surface-layer water in Wulixia reservoir is a CO<inf>2</inf> sink in summer, varying between -30.14 and -3.47 mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>. However, it is the source of CO<inf>2</inf> in autumn and winter, varying between 15.57 mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup> and 115.06 mg&bull;(m<sup>2</sup>&bull;h)<sup>-1</sup>. The variation of methane flux is obvious in summer, but it is stable in autumn and winter. The spatial distribution of CO<inf>2</inf> and CH<inf>4</inf> show that they are higher in the typical bay area and lower in the tailing dam as well as in the drawdown zone of the reservoir. In addition, the spatial and temporal variation of CO<inf>2</inf> and CH<inf>4</inf> are negatively and positively correlated with primary productivity (r -0.477 and 0.771), respectively. Due to the high activity of photosynthetic micro- organisms in summer, CO<inf>2</inf> can be sequestered, allowing the surface-layer water in Wulixia reservoir to be a CO<inf>2</inf> sink. In addition, methanogenic bacteria can oxidize organic carbon produced by photosynthetic micro-organisms. Therefore, CH<inf>4</inf> has a negative correlation with primary productivity. The results provide important information for the study of microorganism functions in karst water systems.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:37
Main heading:Phase interfaces
Controlled terms:Carbon dioxide - Greenhouse effect - Greenhouse gases - Microorganisms - Organic carbon - Photosynthesis - Phytoplankton - Reservoirs (water) - Water levels
Uncontrolled terms:Greenhouse gases fluxes - Methane fluxes - Negative correlation - Primary productivity - Spatial and temporal variation - Spatial temporals - Surface layers - Water-air interface
Classification code:441.2  Reservoirs - 451  Air Pollution - 451.1  Air Pollution Sources - 461.9  Biology - 741.1  Light/Optics - 801.4  Physical Chemistry - 804.1  Organic Compounds - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201709119

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 219>

Accession number:20184205948091
Title:Analysis of Greenhouse Gas Emission Characteristics and Their Influencing Factors in the Algae Zone of Lake Taihu
Authors:Jia, Lei (1); Pu, Yi-Ni (1); Yang, Shi-Jun (1); Su, Rong-Ming-Zhu (1); Qin, Zhi-Hao (1); Zhang, Mi (1) 
Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change (ILCEC), Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China 
Corresponding author:Zhang, Mi(zhangm.80@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2316-2329
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to identify CH<inf>4</inf> and CO<inf>2</inf> emission flux characteristics and their impact factors in the algal lake zone of Lake Taihu, CH<inf>4</inf> and CO<inf>2</inf> fluxes were observed by the improved closed chamber method in Meiliang Bay in Lake Taihu. The relationships between CH<inf>4</inf> and CO<inf>2</inf> flux and meteorological factors were analyzed. The results showed that CH<inf>4</inf> and CO<inf>2</inf> fluxes had obvious diurnal variations. The CH<inf>4</inf> flux in the daytime was higher than that in the nighttime in spring; however, the CH<inf>4</inf> flux in the nighttime was higher than that in the daytime in summer. The CO<inf>2</inf> uptake flux in the daytime was higher than that in the nighttime in spring and summer. The algae zone of Lake Taihu was a CH<inf>4</inf> source for the atmosphere. The average CH<inf>4</inf> flux was 4.047 nmol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup> and 40.779 nmol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup> in spring and summer, respectively. The zone was the CO<inf>2</inf> sink for the atmosphere in spring and summer. The average CO<inf>2</inf> flux was -0.160 &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>and -0.033 &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup> in spring and summer, respectively. On an hourly scale, the CH<inf>4</inf> emission flux was positively correlated with air temperature and water temperature (r=0.20, P&lt;0.01 and r=0.34, P&lt;0.01, respectively). When wind speed was lower than 6 m&bull;s<sup>-1</sup>, the CH<inf>4</inf>flux was positively correlated with wind speed (r=0.71, P&lt;0.01). The CO<inf>2</inf> uptake flux had a significant positive correlation with air temperature and wind speed (r=0.14, P&lt;0.01 and r=0.33, P&lt;0.05, respectively). However, the CO<inf>2</inf> uptake flux was negatively correlated with air pressure and solar radiation (r=-0.41, P&lt;0.01 and r=-0.35, P&lt;0.01, respectively). The CO<inf>2</inf> efflux had a significant positive correlation with wind speed (r=0.40, P&lt;0.05). The CO<inf>2</inf> efflux was negatively correlated with solar radiation (r=-0.35, P&lt;0.01). On a daily scale, the CH<inf>4</inf> emission flux had a significant positive correlation with air temperature and water temperature (r=0.83, P&lt;0.01 and r=0.78, P&lt;0.01, respectively).<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Barium compounds
Controlled terms:Algae - Atmospheric temperature - Carbon dioxide - Fluxes - Gas emissions - Greenhouse gases - Lakes - Solar radiation - Wind
Uncontrolled terms:Closed chambers - Closed-chamber method - Emission characteristics - Influencing factors - Lake taihu - Meteorological factors - Positive correlations - Water temperatures
Classification code:443.1  Atmospheric Properties - 451.1  Air Pollution Sources - 657.1  Solar Energy and Phenomena - 804.2  Inorganic Compounds
Numerical data indexing:Velocity 6.00e+00m/s to 2.20e+01m/s
DOI:10.13227/j.hjkx.201708123

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 220>

Accession number:20184205948086
Title:Sludge Conditioning Performance of Polyaluminum, Polyferric, and Titanium Xerogel Coagulants
Authors:Wang, Xiao-Meng (1); Wang, Xin (1); Yang, Ming-Hui (1); Zhang, Shu-Juan (1) 
Author affiliation:(1) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China 
Corresponding author:Zhang, Shu-Juan(sjzhang@nju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2274-2282
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The sludge conditioning performance of inorganic Al, Fe, and Ti coagulants were systematically compared in terms of specific resistance to filtration (SRF), the content of protein and polysaccharide in extracellular polymeric substances (EPS), the change in three-dimensional excitation emission matrix fluorescence (3D-EEM), the molecular weight of organic matter in EPS, and the floc size and surface morphology. The sludge conditioning ability and the mechanism were systematically analyzed. The results showed that the sludge conditioning ability of the three inorganic coagulants was in the order of polyaluminum chloride (PAC)&gt;titanium xerogel coagulant (TXC)&gt;polymeric ferric sulfate (PFS). After conditioning, the contents of protein and polysaccharide in the EPS were greatly reduced, especially in the loosely bound EPS (LB-EPS). The combined capacity for coagulation between TXC/PFS and organic matter was stronger than that of PAC. The content of polysaccharide in LB-EPS was the key factor affecting the sludge dewatering performance but not the coagulated floc size. The surface charge and the chelating ability with organic matter co-determined the sludge dewatering ability. The organic cationic polymer, polyacrylamide (PAM), made the sludge aggregate via charge neutralization. However, the use of PAM alone was not a good choice owing to the low dewatering ability and the loose sludge structure. The results here are helpful for the selection of suitable coagulants for sludge conditioning.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Coagulation
Controlled terms:Biogeochemistry - Biological materials - Chlorine compounds - Dewatering - Iron compounds - Organic compounds - Proteins - Sulfur compounds - Titanium - Xerogels
Uncontrolled terms:Charge neutralization - Excitation-emission matrix fluorescences - Extra-cellular polymeric substances - Inorganic coagulants - Polyaluminum chloride - Polymeric ferric sulfate - Sludge conditioning - Specific resistance to filtration
Classification code:461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 542.3  Titanium and Alloys - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201710205

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 221>

Accession number:20184205948079
Title:Mechanism of As(Ⅴ)Removal from Water by Lanthanum and Cerium Modified Biochars
Authors:Li, Jin (1, 2); Zu, Yan-Qun (1); Li, Gang (3); Sun, Guo-Xin (2) 
Author affiliation:(1) College of Resources and Environment, Yunnan Agricultural University, Kunming; 650201, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China 
Corresponding author:Sun, Guo-Xin(gxsun@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2211-2218
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Loaded lanthanum or cerium biochars were prepared by one step pyrolysis of La(NO<inf>3</inf>)<inf>3</inf>-laden or Ce(NO<inf>3</inf>)<inf>3</inf>-laden rice hulls and were employed for enhancing the adsorption of As(&#8548;) from water. In contrast with BC and Ce-BC in this study, La-BC had better adsorption capacity in the acidic condition. The maximum adsorption capacity could reach 20.1 mg&bull;g<sup>-1</sup>. With increased pH, the adsorption capacity of La-BC was reduced. The highest adsorption capacity reached 39.1 mg&bull;g<sup>-1</sup> (pH=5) and the lowest was 17.6 mg&bull;g<sup>-1</sup> (pH=9). The resulting La-BC with As(&#8548;) adsorption was characterized by SEM-EDS, FTIR, and XPS. There were two types of active adsorption sites for As(&#8548;), oxygen-rich functional groups and lanthanum oxide. Although Ce-BC had oxygen-rich functional groups and cerium oxide, it was unable to participate in the adsorption of As(&#8548;) from water.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Water treatment
Controlled terms:Adsorption - Cerium - Cerium oxide - Lanthanum - Oxygen
Uncontrolled terms:Acidic conditions - Active adsorption - Adsorption capacities - Bio chars - Rice hulls - SEM-EDS
Classification code:445.1  Water Treatment Techniques - 547.2  Rare Earth Metals - 802.3  Chemical Operations - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201709215

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 222>

Accession number:20184205947366
Title:Emission Characteristics of Dehydrated Sugar and Acephenanthrylene in Particles from Tropical Forest Burning
Authors:Jin, Cheng-Miao (1); Cui, Min (1); Han, Yong (1); Chen, Ying-Jun (1); Tang, Jiao (2); Li, Jun (2); Zhang, Gan (2) 
Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (2) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China 
Corresponding author:Chen, Ying-Jun(yjchentj@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2538-2547
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Forest vegetation burning is an important source of atmospheric particulates. In this study, 22 kinds of typical tropical trees in Southeast Asia, which can be divided into evergreen trees, deciduous trees, and shrubs, were selected for experimentation. The emission characteristics of dehydrated sugar, acephenanthrylene, aceanthrylene, and retene were analyzed. The trend of the average emission factor for total sugar was evergreen trees (1.56 g&bull;kg<sup>-1</sup>&plusmn;1.01 g&bull;kg<sup>-1</sup>)&lt;shrubs (1.99 g&bull;kg<sup>-1</sup>&plusmn;0.64 g&bull;kg<sup>-1</sup>)&lt;deciduous trees (5.38 g&bull;kg<sup>-1</sup>&plusmn;7.18 g&bull;kg<sup>-1</sup>). Furthermore, the trend of the average emission factor of acephenanthrylene was evergreen trees (2.63 mg&bull;kg<sup>-1</sup>&plusmn;2.44 mg&bull;kg<sup>-1</sup>) &asymp; shrubs (2.46 mg&bull;kg<sup>-1</sup>g&plusmn;2.14 mg&bull;kg<sup>-1</sup>)&lt;deciduous trees (6.07 mg&bull;kg<sup>-1</sup>&plusmn;8.50 mg&bull;kg<sup>-1</sup>). For ratios of organic biomarkers, the average ratios of Lev/Man for trees and shrubs were 20.6&plusmn;11.90 and 23.2&plusmn;9.20, respectively. The range of Lev/Man was 5.8-51.5 in this study. The average ratios of AP/AC for trees and shrubs were 7.13&plusmn;5.18 and 5.53&plusmn;1.51, respectively. Compared with the dehydrated sugar, which was affected by more conditions, the analysis methods of aromatic hydrocarbons were simple. Furthermore, although the ratio of AP/AC was less stable than that of FL/PY in this manuscript, AP/AC was less affected by other sources of pollution and had higher specificity. In conclusion, the advantages and disadvantages of each organic biomarker can be synthetically considered in terms of biomass source analysis in order to improve accuracy, and acephenanthrylene was a better choice than other biomarkers.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:43
Main heading:Forestry
Controlled terms:Aromatic hydrocarbons - Biomarkers - Tropics
Uncontrolled terms:Acephenanthrylene - Atmospheric particulate matter - Biomass-burning - Levoglucosan - Tracer compounds
Classification code:443  Meteorology - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201711001

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 223>

Accession number:20184205947407
Title:Influence of Biochar Application on Growth and Antioxidative Responses of Macrophytes in Subsurface Flow Constructed Wetlands
Authors:Huang, Lei (1, 2); Chen, Yu-Cheng (1, 2); Zhao, Ya-Qi (1, 2); Xiao, Guang-Quan (1, 2); Yang, Zhi-Min (1, 2) 
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Engineering Research Center of Rural Cleaning, Chongqing; 400716, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2904-2910
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Constructed wetlands (CWs) have high potential for wastewater treatment in developing countries because of their operational convenience and low maintenance costs. However, rapid accumulation of macrophytes in these wetlands, as a result of plant litter recycling, can lead to lower removal efficiencies. Periodic harvesting is consider to be the effective measure to maintain the wastewater treatment performance, and so a lot of harvested plant waste needs to be properly disposed of. However, in China, plant waste is usually used for agricultural burning and the greenhouse gas emissions bring adverse effects on the atmospheric environment. In the traditional subsurface flow CW, the dissolved oxygen (DO) concentration is low, resulting in long-term anoxic or anaerobic conditions, which will bring damages to plant body, such as membrane lipid peroxidation and protein and DNA damage. Generally, the addition of biochar to CWs is beneficial for aeration, and improves the internal environment of wetlands. Hence, the effects of plant biochar on the pollutant purification efficiencies in CWs were studied, and the role of biochar in macrophyte growth and antioxidative response was investigated. Based on the results of biochar application in agricultural fields, the harvested wetland plant straw was pyrolyzed to biochar at 500 &#8451; under a dynamic high-purity nitrogen atmosphere. The wetland plant Acorus calamus L. (AC) was chosen for this study. The impact characteristics of biochar on AC were studied in five independent CWs built in a greenhouse, by combining the analyses of growth and antioxidative responses of plants. Results showed that the removals of ammonium (NH<inf>4</inf><sup>+</sup>-N) and total nitrogen (TN) were significantly enhanced when biochar was added to CWs and that higher long-term nitrogen removal rates were achieved when the biochar application rate was increased. The photosynthetic pigment content in AC increased significantly with increasing biochar application rate. This stimulated photosynthesis and increased the soluble protein (SP) and plant biomass amounts. Further, glutamine synthetase (GS) activity was strengthened with the addition of biochar. This helped enhance the NH<inf>4</inf><sup>+</sup>-N metabolism and increased the relative uptake rate of AC. This study confirmed that long-term anoxic or anaerobic conditions in CWs cause membrane lipid oxidation in plants. However, the activity of the antioxidative response system was promoted with the addition of biochar, significantly decreasing the malonic dialdehyde (MDA) content in the plants.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Wetlands
Controlled terms:Amino acids - Developing countries - Dissolved oxygen - Efficiency - Gas emissions - Greenhouse gases - Harvesting - Lipids - Nitrogen removal - Proteins  - Waste treatment - Wastewater treatment
Uncontrolled terms:Acorus calamus L - Antioxidative response - Bio chars - Plant growth - Subsurface flow constructed wetlands
Classification code:451.1  Air Pollution Sources - 452.4  Industrial Wastes Treatment and Disposal - 804.1  Organic Compounds - 821.3  Agricultural Methods - 913.1  Production Engineering
DOI:10.13227/j.hjkx.201801061

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 224>

Accession number:20184205947390
Title:Shortcut Nitrification Rapid Start and Stability of Corn Starch Wastewater
Authors:Long, Bei-Sheng (1); Liu, Xun-Lei (1); Liu, Hong-Bo (1); Yang, Jing-Xin (2); Yuan, Shu-Sen (1) 
Author affiliation:(1) School of Water Conservancy and Environment Engineering, Changchun Institute of Technology, Changchun; 130012, China; (2) Jilin Zoratech Environmental Engineering Company Limited, Changchun; 130031, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2756-2762
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A rapid startup shortcut nitrification method is researched with suppression factors, such as high temperature, high pH, low DO, etc., in a SBR reactor, with anaerobic effluent (C/N 0.93-1.53) from a certain corn starch company wastewater treatment station. Targeting the already started up shortcut nitrification system, the stability and control strategy are studied further after cancelling the high pH and high temperature limiting factors. Results show that shortcut nitrification (NO<inf>2</inf><sup>-</sup>-N accumulation rate above 80%) can be quick-started after 17 cycles of domestication and culture when the controlling temperature is (30&plusmn;1)&#8451;, the pH is 7.8-8.2, and the DO of the regular nitrification section is 0.7-1.0 mg&bull;L<sup>-1</sup>, combined with on-line control of the pH and DO parameters in the nitrification process. When the limits of high pH and high temperature are cancelled for the already started-up shortcut nitrification system, long-term stable operation can be obtained for a shortcut nitrification of NO<inf>2</inf><sup>-</sup>-N accumulation rate above 98% under the conditions of sufficient alkalinity, temperature 23-24&#8451;, and DO 0.7-1.0 mg&bull;L<sup>-1</sup> in the regular nitrification section, combined with the on-line control of nitrification process. The control strategies can be summarized as: first, the shortcut nitrification is rapidly started up under high temperature, high pH, and relatively low DO suppression factors, and then the high pH and high temperature limitation factors are eliminated. The control strategies have good practical significance for realizing the long-term stable shortcut nitrification for corn starch wastewater with relatively high ammonia nitrogen concentration and relatively high temperature.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Nitrification
Controlled terms:Alkalinity - Ammonia - Effluent treatment - Effluents - Nitrogen oxides - pH - Process control - Starch - Temperature - Wastewater treatment
Uncontrolled terms:Accumulation rates - Ammonia nitrogen - Anaerobic effluents - Control strategies - Corn starch - Nitrification process - Shortcut nitrification - Stability and control
Classification code:452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 641.1  Thermodynamics - 801.1  Chemistry, General - 802.2  Chemical Reactions - 804.1  Organic Compounds - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 7.00e-04kg/m3 to 1.00e-03kg/m3, Percentage 8.00e+01%, Percentage 9.80e+01%
DOI:10.13227/j.hjkx.201710135

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 225>

Accession number:20184205947408
Title:Effect of Iron on the Release of Arsenic in Flooded Paddy Soils
Authors:Wang, Xin (1); Zhong, Song-Xiong (2, 3); Chen, Zhi-Liang (1); He, Hong-Fei (2); Dong, Jia-Hua (1); Chen, Xiao-Li (1) 
Author affiliation:(1) South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou; 510665, China; (2) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Zhong, Song-Xiong(sxzhong123@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2911-2918
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Amorphous iron oxides in paddy soil are critical adsorbents of arsenic. The flooding period during rice cultivation contributes to the reductive dissolution of these amorphous iron oxides, which releases sorbed arsenic into the paddy soil solution. However, more detailed work should be conducted to evaluate quantitatively arsenic immobilization, release, and transformation regulated by metastable amorphous iron oxides. In previous studies, arsenic in the soil solution phase and solid phase were classified into F1 (exchangeable arsenic), F2 (specifically sorbed arsenic), F3 (amorphous iron oxide bound arsenic), and F4 (crystalline iron oxide bound arsenic), according to a sequential extraction procedure using reagents of increasing dissolution strength. In this study, soil samples were collected from the vicinity of a silver smelting plant in Chenzhou, Hunan Province, and the contribution of different arsenic speciation (F1, F2, F3, and F4) to arsenic release during anaerobic enrichment incubation of paddy soil was investigated. Sample analysis was conducted at the end of the first phase (day 15) and the second phase (day 30). The effects of amorphous iron oxides in paddy soil on migration and transformation of arsenic were discussed. Results showed significant elevation of dissolved Fe(&#8545;) and arsenic concentration (P&lt;0.05) in enrichment solutions in the second phase compared with that in the first phase. Arsenic released in the soil solution in both phases originated from exchangeable arsenic and specifically sorbed arsenic, as indicated by its significantly positive correlation with F1 and F2 (r=0.73, P&lt;0.05; r=0.657, P&lt;0.05). However, an insignificant positive correlation was found between the arsenic released and F3. Moreover, HCl-extractable Fe(&#8545;) was significantly and positively correlated with arsenic (r=0.577, P&lt;0.05; r=0.613, P&lt;0.05), while amorphous iron oxides were significantly and negatively correlated with arsenic (r=-0.428, P=0.126; r=-0.564, P&lt;0.05). In conclusion, arsenic in the F1 and F2 fractions acted as the major source of released arsenic. Despite elevated levels of HCl-extractable Fe(&#8545;) that might result from the slight reductive dissolution of amorphous iron oxide, the significant negative correlation between dissolved arsenic and amorphous iron oxides indicated that metastable amorphous iron oxides in anaerobic paddy soil can generally sorb dissolved arsenic effectively, resulting in lower mobility of arsenic. Increasing the level of amorphous iron oxides in paddy soil is conducive to inactivation of arsenic.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:Iron oxides
Controlled terms:Arsenic - Dissolution - Floods - Iron - Smelting - Soil moisture
Uncontrolled terms:Amorphous iron oxides - Arsenic concentration - Flooded and anaerobic - Microenvironments - Paddy soils - Positive correlations - Reductive dissolution - Sequential extraction procedure
Classification code:483.1  Soils and Soil Mechanics - 533.2  Metal Refining - 545.1  Iron - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201711156

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 226>

Accession number:20184205948088
Title:Effect of Different Ratios of Anaerobic Time and Aeration Time on the Formation of Partial Nitrification Granules
Authors:Li, Dong (1); Guo, Yue-Zhou (1); Cao, Mei-Zhong (1); Lao, Hui-Mei (1); Li, Shuai (2); 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:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2289-2295
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Flocculent sludge with good nitritation performance and MLSS and SVI values of 3 500 mg&bull;L<sup>-1</sup> and 162 mL&bull;g<sup>-1</sup>, respectively, was inoculated in the R1, R2, and R3 groups of the same SBR reactors at room temperature (22-28&#8451;). The effects of different anaerobic time and aeration time ratios (1:2, 1:1, and 2:1) on the formation of partial nitrification granular sludge were studied. The results showed that granules in three reactors were successfully formed at 103 d, 82 d, and 64 d. The nitrosation rate of R1, R2, and R3 were 86%, 98%, and 96%, respectively, and SVI decreased to 89, 75, and 58 mL&bull;g<sup>-1</sup> and MLSS increased to 2 314, 2 781, and 2 946 mg&bull;L<sup>-1</sup>, respectively, at the 85 d. The larger ratio of anaerobic time and aeration time was more conducive to sludge granulation, better settling, and nitritation performance. When the anaerobic time and aeration time ratio was 1:2, the nitritation performance of the sludge decreased since the NOB could not be suppressed, and the settling performance of the sludge became better and then worse. In addition, at the larger ratio of anaerobic time and aeration time, there was more PN and PS from microbial secretion. The PN of R1, R2, and R3 was smaller at the end of the anaerobic phase compared to that of the aerobic phase in the early stage of granular formation, but were reversed in the stabilization stage. The PS of the anaerobic phase was larger than that of the aerobic stage over the entire process.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Nitrification
Controlled terms:Granulation
Uncontrolled terms:Aerobic phase - Flocculent sludge - Granular sludge - Nitritation - Nitrosation - Partial nitrification - Time ratio
Classification code:802.2  Chemical Reactions - 802.3  Chemical Operations
Numerical data indexing:Mass_Density 2.95e+00kg/m3 to 2.20e-02kg/m3, Mass_Density 3.50e+00kg/m3 to 2.20e-02kg/m3, Percentage 8.60e+01%, Percentage 9.60e+01%, Percentage 9.80e+01%, Specific_Volume 1.62e-01m3/kg to 2.20e-02m3/kg, Specific_Volume 5.80e-02m3/kg to 2.20e-02m3/kg
DOI:10.13227/j.hjkx.201710079

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 227>

Accession number:20184205947386
Title:Distribution and Treatment of Antibiotics in Typical WWTPs in Small Towns in China
Authors:Chai, Yu-Feng (1, 2); Zhang, Yu-Xiu (1); Chen, Mei-Xue (2, 3); Wang, Rui (2, 3); Liu, Meng-Meng (2, 3); Zheng, Jia-Xi (2, 3); Wei, Yuan-Song (2, 3, 4) 
Author affiliation:(1) School of Chemical &amp; Environmental Engineering, China University of Mining and Technology, Beijing; 100083, 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) Institute of Energy, Jiangxi Academy of Sciences, Nanchang; 330029, China 
Corresponding author:Zhang, Yu-Xiu(zhangyuxiu@cumtb.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2724-2731
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:As a new, persistent pollutant in the environment, antibiotics are one of the most important pollutants in sewage treatment plants. The objective of this work was to investigate the concentration distribution and removal efficiency of antibiotics for three typical wastewater treatment technologies applied in small towns (CASS, A<sup>2</sup>/O, and Orbal oxidation ditch) using solid phase extraction-liquid chromatography-tandem mass spectrometry. Sixteen typical antibiotics, including four tetracyclines, three &beta;-lactams, four macrolides, three quinolones, and two sulfonamides, were analyzed in the influent and effluent. In addition, the relationship between the presence of antibiotics and the basic water quality (NH<inf>4</inf><sup>+</sup>-N, TN, COD, pH, etc.) in the WWTPs was analyzed. The results showed that ofloxacin (OFX) and norfloxacin (NOR) were the main antibiotics in the WWTPs in this study. However, the concentrations of these two antibiotics in the effluent were low, indicating effective antibiotic removal efficiency. The antibiotic removal efficiency was higher than 60% in five of the WWTPs. Compared with the A<sup>2</sup>/O process, the CASS and Orbal oxidation ditch technologies resulted in higher removals of most of the antibiotics. In addition, the CASS and A<sup>2</sup>/O processes worked best for the removal of &beta;-lactam [ampicillin (AMP) and penicillin (PCN)], quinolones (ENR, NOR, and OFX), and macrolide (CLR), while the Orbal oxidation ditch worked best for the removal of tetracyclines (TC and OTC) and sulfonamides [sulfadiazine (SD)]. The correlation between antibiotic concentration and the basic parameters of water quality (NH<inf>4</inf><sup>+</sup>-N, TN, COD, pH, etc.) was analyzed, and it was found that the water quality parameters had some effect on the concentration of antibiotics. With higher concentrations of the basic water quality parameters, higher the concentration of erythromycin (EM), roxithromycin (ROX), 4-epi-Tetracycline (E-TC), clarithromycin (CLR), ciprofloxacin (CIP), ofloxacin (OFX), epioxytetracycline (E-OTC), tetracyclines (TC), oxytetracycline (OTC), and norfloxacin (NOR) were observed. In summary, it is important to ensure the stable operation of small town WWTPs to reduce the ecological risk of antibiotics.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Antibiotics
Controlled terms:Amides - Chemical oxygen demand - Efficiency - Effluents - Liquid chromatography - Mass spectrometry - Metabolites - Oxidation - Phase separation - Pollution  - Removal - Sewage lagoons - Sulfur compounds - Wastewater treatment - Water quality
Uncontrolled terms:Antibiotic concentration - Concentration distributions - Small towns - Solid-phase extraction - SPE-LC-MS - Wastewater treatment technologies - Water quality parameters - WWTP
Classification code:445.2  Water Analysis - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.6  Medicine and Pharmacology - 801  Chemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 913.1  Production Engineering
Numerical data indexing:Percentage 6.00e+01%
DOI:10.13227/j.hjkx.201710104

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 228>

Accession number:20184205947373
Title:Distribution Characteristics and Risk Assessment of Heavy Metals in the Sediments of the Estuary of the Tributaries in the Three Gorges Reservoir, SW China
Authors:Fang, Zhi-Qing (1, 2); Chen, Qiu-Yu (1); Yin, De-Liang (1); Wang, Zhi-Kang (2); Sun, Tao (1); Wang, Yong-Min (1, 3); Xie, De-Ti (1, 3); Wang, Ding-Yong (1, 3) 
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; (3) Chongqing Engineering Research Center for Agricultural Non-point Source Pollution Control in the Three Gorges Reservoir Area, Chongqing; 400716, China 
Corresponding author:Wang, Ding-Yong(dywang@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2607-2614
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the pollution status of sediments at the junction of the Three Gorges Reservoir area, sediment samples were collected over four seasons from the junction of the estuary located at a tributary of the Ruxi River and the Yangtze River. The content of eight heavy metals (HMs), including Cr, Zn, Mn, Ni, Cu, As, Cd, and Pb, in sediments was determined by ICP-MS. The results showed the average levels of investigated HMs (in mg&bull;kg<sup>-1</sup>) were Cr (45.24), Zn (46.46), Mn (406.14), Ni (20.885), Cu (12.49), As (7.02), Cd (0.253), and Pb (11.042). The distribution analysis indicated that the levels of HMs at the river mouth were higher than that of the tributaries of the middle reaches and the two sections nearby. The seasonal distribution shows that the heavy metal content in the spring sediment is higher than in summer, autumn and winter. In addition, the correlation analysis indicated that the eight HMs possessed similar homologous characteristics and had common exogenous inputs. The assessment of the Geo Accumulation Index showed slight Cd pollution in the estuary of Ruxi River, and the Potential Ecological Risk index showed that Cd presented moderate ecological risks. The toxic effect of benthonic organisms was possibly correlated to Ni contamination at the intersection of the tributary and main stream, which was supported by the evidence from the sediment quality criteria. In conclusion, the rating of ecological risk at the mouth of the Ruxi River tributary is slight.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:River pollution
Controlled terms:Cadmium - Estuaries - Heavy metals - Nickel - Risk assessment - Rivers - Sediments
Uncontrolled terms:Distribution - Distribution characteristics - Geo-accumulation index - Potential ecological risk - Seasonal distributions - Sediment quality criterion - Three gorges reservoir - Three gorges reservoir area
Classification code:407.2  Waterways - 453  Water Pollution - 483  Soil Mechanics and Foundations - 531  Metallurgy and Metallography - 548.1  Nickel - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201711066

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 229>

Accession number:20184205948083
Title:Operating Characteristics and Fouling Characteristics of a RO Membrane System for Desalination of Dyeing Wastewater
Authors:Tan, Yu-Jun (1, 2); Zhang, Ze-Tian (1, 2); Wu, Qian-Yuan (1); Yao, Ying (3); Hu, Hong-Ying (2, 4); Qiu, Pei-Wen (3) 
Author affiliation:(1) Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Graduate School at Shenzhen, Tsinghua University, Shenzhen; 518055, China; (2) State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China; (3) Foshan Jialida Environmental Protection Technology Co., Ltd., Foshan; 528000, China; (4) Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen; 518055, China 
Corresponding author:Wu, Qian-Yuan(wuqianyuan@tsinghua.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2249-2255
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The reverse osmosis (RO) process is of great significance for the desalination and reclamation of dyeing wastewater. However, fouling of RO membranes has been a severe problem and key limiting factor in the widespread application of the RO process. The operating characteristics and fouling characteristics of a RO membrane system for desalination of dyeing wastewater were investigated in an industrial park in Guangdong Province. The results showed that the COD and turbidity of RO influent after ozone oxidation-sand filtration-ultrafiltration (UF) processes were 12.4 mg&bull;L<sup>-1</sup> and&lt;1 NTU, respectively, with a stable desalination rate of the RO system of around 98%. The COD and turbidity of the RO effluent were 0.7 mg&bull;L<sup>-1</sup> and 0.12 NTU, respectively. However, after 3 years of operation, the pressure drop across the membrane reached 0.6 MPa, and the permeate flux decreased to 120 m<sup>3</sup>&bull;h<sup>-1</sup>, which could not be restored to its original flux by chemical cleaning. The organic and inorganic matter occupied (53.5&plusmn;0.2)% and (46.5&plusmn;0.2)% of the deposits on the RO membrane, respectively, suggesting both organic and inorganic fouling were the main problems for the RO membrane. Si, Al, and Ca were major inorganic elements on the RO membrane. Large amounts of Si, Al, and organic matter deposited on the RO membrane were dissolved easily by alkaline (NaOH) solution than acid (HCl) solution.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Wastewater reclamation
Controlled terms:Alkalinity - Chemical cleaning - Chemical oxygen demand - Chlorine compounds - Desalination - Dyeing - Effluents - Membrane fouling - Membranes - Reverse osmosis  - Sodium hydroxide - Turbidity
Uncontrolled terms:Dyeing wastewater - Fouling characteristics - Guangdong Province - Inorganic elements - Membrane autopsies - Operating characteristics - RO process - System performance
Classification code:445.1  Water Treatment Techniques - 452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 741.1  Light/Optics - 801.1  Chemistry, General - 802.3  Chemical Operations - 951  Materials Science
Numerical data indexing:Age 3.00e+00yr, Mass_Density 1.24e-02kg/m3 to 2.20e-02kg/m3, Mass_Density 7.00e-04kg/m3 to 2.20e-02kg/m3, Percentage 9.80e+01%, Pressure 6.00e+05Pa
DOI:10.13227/j.hjkx.201707020

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 230>

Accession number:20184205948064
Title:Distribution and Settlement of Microplastics in the Surface Sediment of Yangtze Estuary
Authors:Zhu, Xiao-Tong (1); Yi, Jun (1, 2); Qiang, Li-Yuan (1); Cheng, Jin-Ping (1, 2, 3) 
Author affiliation:(1) State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai; 200062, China; (2) Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity, Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen; 518057, China; (3) Environmental Science Programs, The Hong Kong University of Science and Technology, Hong Kong, Hong Kong 
Corresponding author:Cheng, Jin-Ping(jinpingcheng@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2067-2074
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study is designed to understand the microplastic contamination in the coastal area of Yangtze estuary. The abundance and distribution profiles of microplastics in the surface sediment of six sampling sites along the Yangtze estuary were examined throughout one year. The detected average concentration of microplastic, including fibers and fragments, in the surface sediment of Yangtze estuary was (3.42&plusmn;1.31) items&bull;g<sup>-1</sup> (DW). Sampling during four seasons, in the months of January, April, July, and November, indicated that the highest abundance of microplastics in Yangtze estuary surface sediment occurred in January. A re-suspension experiment showed that microplastics tend to settle in the surface sediment after re-suspension. The distribution and settlement of microplastics along the coastal area has a high concordance with the dynamic erosion-accretion process of the Yangtze estuary. Microplastics tend to settle in accretion sites rather than in erosion sites.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Suspended sediments
Controlled terms:Coastal zones - Erosion - Estuaries - Surficial sediments
Uncontrolled terms:Distribution - Microplastics - Seasonal patterns - Surface sediments - Yangtze Estuary
Classification code:407.2  Waterways - 471  Marine Science and Oceanography - 483  Soil Mechanics and Foundations
DOI:10.13227/j.hjkx.201709032

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 231>

Accession number:20184205948055
Title:Characteristics and Source Apportionment of Water-soluble Inorganic Ions in Road Dust PM<inf>2.5</inf> During Spring in Tianjin Using the Quadrat Sampling Method
Authors:Zhao, Jing-Qi (1); Ji, Ya-Qin (1); Zhang, Lei (1); Wang, Shi-Bao (1); Li, Yue-Yang (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:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:1994-1999
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to collect comprehensive information regarding the characteristics and sources of the water-soluble inorganic ions in road dust (RD) PM<inf>2.5</inf> in Tianjin, samples of road dust were collected in April 2015 in Tianjin, and then re-suspended on filters using a NK-ZXF sampler. The concentrations of the major water-soluble inorganic ions were analyzed by ion chromatography. A correlation analysis, ratio method, and principal component analysis were used to analyze the sources of RD PM<inf>2.5</inf>. The results showed that the total water-soluble inorganic ion concentration in Tianjin accounted for 6.13%&plusmn;2.32%, varying with different road types. Na<sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, and Ca<sup>2+</sup> showed high homology. NO<inf>3</inf><sup>-</sup>/SO<inf>4</inf><sup>2-</sup> revealed that the main source of PM<inf>2.5</inf> was mostly attributed to fixed sources. The principal component analysis showed that the main sources of RD PM<inf>2.5</inf> in Tianjin were coal combustion, mobile sources, biomass burning, and construction dust.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:25
Main heading:Principal component analysis
Controlled terms:Coal combustion - Coal dust - Ion chromatography - Ions - Roads and streets
Uncontrolled terms:PM2.5 - Road dusts - Source apportionment - Tianjin - Water soluble inorganic ions
Classification code:406.2  Roads and Streets - 503  Mines and Mining, Coal - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 801  Chemistry - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201710092

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 232>

Accession number:20184205948093
Title:Characteristics of CO<inf>2</inf> Flux in a Mature Apple (Malus demestica) Orchard Ecosystem on the Loess Plateau
Authors:Yang, Jian-Feng (1); Yang, Xiao-Ni (1); Wang, Jun-Hua (1); Duan, Yu-Min (1); Qi, Xiang-Ning (1); Zhang, Lin-Sen (1) 
Author affiliation:(1) College of Horticulture, Northwest A&amp;F University, Yangling; 712100, China 
Corresponding author:Zhang, Lin-Sen(linsenzhang@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2339-2350
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Apples (Malus demestica) in the Loess Plateau region are grown in the largest apple orchards in the world and China, playing an important role in the improvement of the ecological environment. However, there is little research on the scale of the ecological system of the apple orchard in the Loess Plateau region. In this study, the CO<inf>2</inf> flux of a mature apple orchard in the Loess Plateau region was observed using an eddy covariance technique in the Shannxi Province. Based on the observation data sets observed from January 2016 to December 2016, a quantitative analysis of the apple orchard net ecosystem exchange (NEE), ecosystem respiration (R<inf>eco</inf>), total ecosystem primary productivity (GPP) changes at different time scales, changes in main meteorological factors, the effects of soil temperature (T<inf>s</inf>) and air temperature (T<inf>a</inf>) at different levels, and PAR on NEE were discussed. The results showed that during the study period, the apple orchard ecosystem NEE monthly totals were positive (as a carbon source) in the non-growing season in December, January, February and March, were negative (a carbon sink) in the growing season from April to November, and functioned as a strong carbon sink year round. The maximum peak NEE (absolute value) monthly average daily change appeared in August [-17.08 &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>], and the smallest peak appeared in November [-4.47 &mu;mol&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>] during the growing season. The NEE monthly average daily change value during the non-growing season is very weak, though the change is not obvious. GPP, R<inf>eco</inf>, and NEE maximum daily total values were 11.12, 5.04, and -7.34 g&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup>, respectively. GPP, R<inf>eco</inf>, and NEE maximum monthly total values were 238.97, 105.38, and -144.44 g&bull;(m<sup>2</sup>&bull;month)<sup>-1</sup>, respectively, as GPP and NEE maintained high cumulative values that were relatively stable from May through August. The annual GPP, R<inf>eco</inf>, and NEE were 1 223.2, 525.2, and -698.0 g&bull;(m<sup>2</sup>&bull;a)<sup>-1</sup>. The observations show that the mature apple orchard ecosystem in the Chinese Loess Plateau has a relatively high carbon sequestration capacity. Nighttime ecosystem respiration R<inf>eco.n</inf> was positively correlated with the soil temperature and air temperature at different levels, and the correlation coefficients were T<inf>s-5 cm</inf>&gt;T<inf>s-10 cm</inf>&gt;T<inf>a-4 m</inf>&gt;T<inf>a-8 m</inf>, The photosynthetic active radiation (PAR) can explain more than 80% of the daytime NEE changes.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:39
Main heading:Ecosystems
Controlled terms:Atmospheric temperature - Carbon - Carbon dioxide - Fruits - Landforms - Orchards - Sediments
Uncontrolled terms:Apple orchards - Carbon sink - CO2 fluxes - Eddy covariance - Loess Plateau
Classification code:443.1  Atmospheric Properties - 454.3  Ecology and Ecosystems - 481.1  Geology - 483  Soil Mechanics and Foundations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 821.3  Agricultural Methods - 821.4  Agricultural Products
Numerical data indexing:Percentage 8.00e+01%
DOI:10.13227/j.hjkx.201709216

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 233>

Accession number:20184205948067
Title:Characteristics of Dissolved Organic Matter (DOM) and Relationship with Dissolved Heavy Metals in a Peri-urban and an Urban River
Authors:Liang, Meng-Qi (1); Shao, Mei-Ling (1); Cao, Chang-Li (2, 3); Zong, Ya-Nan (1, 3); Tang, Jian-Feng (2, 3) 
Author affiliation:(1) Key Laboratory of Biotic Environment and Ecological Safety in Anhui Province, College of Life Sciences, Anhui Normal University, Wuhu; 241000, China; (2) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (3) Ningbo Urban Environment Observation and Research Station, Chinese Academy of Sciences, Ningbo; 315830, China 
Corresponding author:Tang, Jian-Feng(jftang@iue.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2095-2103
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Dissolved organic matter (DOM) is ubiquitous in the aquatic environment, playing an important role in the fate of heavy metals in aquatic systems. In this study, we characterized the DOM and heavy metals and their distribution in a peri-urban river and an urban river in Ningbo city. In addition, the relationship between DOM and dissolved heavy metals was also determined. Results showed that higher DOC, CDOM, and FDOM concentrations were found in the river with the higher urbanization level. Four fluorescence peaks were identified in the excitation-emission matrix (EEM) of DOM, including fulvic acid-like fluorescence peaks A and C and protein-like fluorescence peaks B and T. The higher fluorescence intensities of peak B and T were found in the urban river, and similar trends were also found for the degree of humification and aromaticity of DOM. Similarly, concentrations of heavy metals, such as As, Cu, and Mn, were significantly higher in the urban river. Moreover, DOM had significant positive correlations with Cu, Cr, Mn, As, Zn, and Pb in the urban river, while DOM only exhibited significant positive correlations with Mn, Pb, and Cu in the peri-urban river. In conclusion, urbanization level influenced the characteristics and concentrations of CDOM in rivers which were closely related to the distribution of heavy metals.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:39
Main heading:River pollution
Controlled terms:Biogeochemistry - Biological materials - Correlation methods - Dissolution - Fluorescence - Heavy metals - Organic compounds - Rivers - Water pollution control
Uncontrolled terms:Aquatic environments - Dissolved organic matters - Excitation emission matrices - Excitation-emission matrix fluorescences - Fluorescence intensities - Fluorescence peak - Positive correlations - Urbanization levels
Classification code:453  Water Pollution - 453.2  Water Pollution Control - 461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 531  Metallurgy and Metallography - 741.1  Light/Optics - 802.3  Chemical Operations - 804.1  Organic Compounds - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201710089

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 234>

Accession number:20184205947365
Title:Characteristics and Source Apportionment of Volatile Organic Compounds in the Rainy Season of Guangzhou City
Authors:Gu, Ying-Gang (1, 2); Yu, Xiao-Fang (1, 2); Yang, Wen-Da (1, 2); Tian, Zhi-Lin (1, 3); Li, Mei (1, 2); Cheng, Peng (1, 2) 
Author affiliation:(1) Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou; 510632, China; (2) Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution, Guangzhou; 510632, China; (3) Jinan University Institute for Environmental and Climate Research, Guangzhou; 510632, China 
Corresponding author:Li, Mei(m.li@hxmass.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2528-2537
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Atmospheric volatile organic compounds (VOCs) were measured in an urban area of Guangzhou on July 2016 using an on-line gas chromatography mass spectrometry/fire ion detector. Seventy-three VOCs were detected with an average concentration of (118.83&plusmn;79.40) &mu;g&bull;m<sup>-3</sup>, a maximum concentration of 492.42 &mu;g&bull;m<sup>-3</sup>, and a minimum concentration of 10.54 &mu;g&bull;m<sup>-3</sup> during the period. The peak value of the TVOC concentration appeared at about 07:00 in the morning, indicating that motor vehicle pollution had a significant contribution at the site. The minimum value appeared at about 14:00 in the afternoon, related to photochemical losses. High concentrations were also observed from 21:00 to 24:00, which was probably related to pollution emissions and boundary layer compression. Source analysis by PMF showed that the site was mainly affected by five VOC sources: vehicle exhaust, solvent use, fuel loss at fuel stations, plant emissions, and cooking exhaust, the contributions of which were 29.79%, 26.61%, 24.86%, 9.91%, and 8.84%, respectively. Vehicle exhaust was the largest source of VOCs during the daytime, while the contribution of plant emissions increased significantly at noon. The contribution of solvent uses and fuel loss at fuel stations rose during the night and became the main source of VOCs until early morning.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:44
Main heading:Gas chromatography
Controlled terms:Boundary layers - Fuels - Mass spectrometry - Organic solvents - Pollution - Vehicles - Volatile organic compounds
Uncontrolled terms:Average concentration - Gas chromatography-mass spectrometry - Guangzhou city - Layer compression - Maximum concentrations - Pollution emissions - Rainy seasons - Source apportionment
Classification code:801  Chemistry - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Percentage 2.49e+01%, Percentage 2.66e+01%, Percentage 2.98e+01%, Percentage 8.84e+00%, Percentage 9.91e+00%
DOI:10.13227/j.hjkx.201710178

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 235>

Accession number:20184205948056
Title:HONO Pollution Characteristics and Nighttime Sources During Autumn in Guangzhou, China
Authors:Tian, Zhi-Lin (1, 2); Yang, Wen-Da (1, 3); Yu, Xiao-Fang (1, 3); Zhang, Man-Man (1, 3); Zhang, He-Wei (1, 3); Cheng, Ding (1, 3); Cheng, Peng (1, 3); Wang, Bo-Guang (1, 2) 
Author affiliation:(1) Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou; 510632, China; (2) Institute for Environmental and Climate Research, Jinan University, Guangzhou; 511443, China; (3) Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air Pollution, Jinan University, Guangzhou; 510632, China 
Corresponding author:Cheng, Peng(chengp@jnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2000-2009
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Nitrous acid (HONO) plays an important role in atmospheric photochemistry processes because its photolysis provides an efficient source of hydroxyl (OH) radicals in the troposphere. However, few studies exist on HONO in nocturnal chemistry processes. Using the observation data of HONO and related parameters for a super site at Guangzhou Jinan University in October 2015, the pollution processes and sources of HONO during nighttime were analyzed in this study. The results showed that the average concentration of HONO was 4.32 &mu;g&bull;m<sup>-3</sup> during the nighttime, which was 2.6 times its concentration of 1.67 &mu;g&bull;m<sup>-3</sup> in the daytime. The conversion rate of HONO, C<inf>HONO</inf>, during the nighttime was 0.006 8 h<sup>-1</sup>, and the average contribution of vehicle emissions to HONO was 15.1%, with a peak of 37.8% at 20:00. The average net HONO generation rate from the reaction of NO and OH radicals during the night was 0.44 &mu;g&bull;(m<sup>3</sup>&bull;h)<sup>-1</sup>. Correlation analysis suggested that particles could not be the major HONO source, but that relative humidity (RH; 33%-78%) was a key factor. Relevant calculation indicated that the heterogeneous reaction of deposited NO<inf>2</inf> on humid ground surfaces could be the main source of HONO during nighttime.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:57
Main heading:Inorganic acids
Controlled terms:Atmospheric humidity - Free radicals - Phase interfaces - Photolysis - Pollution
Uncontrolled terms:Atmospheric photochemistry - Average concentration - Correlation analysis - Direct emissions - Gas-phase reactions - Heterogeneous reactions - Nitrous acid - Pollution process
Classification code:443.1  Atmospheric Properties - 801.4  Physical Chemistry - 802.2  Chemical Reactions - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.51e+01%, Percentage 3.30e+01% to 7.80e+01%, Percentage 3.78e+01%
DOI:10.13227/j.hjkx.201709269

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 236>

Accession number:20184205947367
Title:Construction and Application of Vertical Diffusion Index for Analyzing Weather during Pollution Events in Tianjin
Authors:Cai, Zi-Ying (1, 2); Han, Su-Qin (2); Zhang, Min (1); Yao, Qing (1); Liu, Jing-Le (2) 
Author affiliation:(1) Tianjin Meteorological Institute, Tianjin; 300074, China; (2) Tianjin Environmental Meteorological Center, Tianjin; 300074, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2548-2556
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on temperature and wind speed data from the 255 meter tall meteorological tower, the characteristics of atmospheric stability were analyzed in Tianjin, with the vertical diffusion index &beta; and &phi; constructed by atmospheric chemical models. This provided information to use the vertical dispersion analysis method to forecast pollution from weather data. The results show that the comprehensive use of atmospheric stability and the vertical diffusion index can provide a better pollution forecast. When the atmospheric stability was D from 07:00-08:00 and 18:00-20:00, compared to when atmospheric stability was C, the probability of heavy pollution weather increased by 10 times. If the vertical diffusion index &beta; and wind speed index were used to forecast heavy pollution, the accuracy rate was 67% higher than when using the single wind speed index. The coefficient between vertical diffusion index &phi; and PM<inf>2.5</inf> mass concentration was 0.8.When the vertical diffusion index &phi; was less than 0.52, the probability of heavy pollution was 75%, identifying 59% of heavy pollution events.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Weather forecasting
Controlled terms:Atmospheric chemistry - Chemical analysis - Chemical stability - Computer simulation - Diffusion - Meteorological instruments - Pollution - Wind
Uncontrolled terms:Atmospheric stability - Meteorological tower - Pollution forecasts - Tianjin - Vertical diffusion - Vertical dispersion - Weather analysis - Wind speed data
Classification code:443  Meteorology - 723.5  Computer Applications - 801  Chemistry
Numerical data indexing:Percentage 5.90e+01%, Percentage 6.70e+01%, Percentage 7.50e+01%, Size 2.55e+02m
DOI:10.13227/j.hjkx.201708233

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 237>

Accession number:20184205947206
Title:Impact of Size on Environmental Behavior of Metal Oxide Nanoparticles
Authors:Yan, Yu-Peng (1); Tang, Ya-Dong (1); Wan, Biao (1); Wang, Xiao-Ming (1); Liu, Fan (1); Feng, Xiong-Han (1) 
Author affiliation:(1) Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), College of Resources and Environment, Huazhong Agricultural University, Wuhan; 430070, China 
Corresponding author:Feng, Xiong-Han(fxh73@mail.hzau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2982-2990
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:With the rapid development of nanotechnology, the environmental behavior and ecological effect of nanoparticles (NPs) are receiving more and more attention. As an important environmental component, metal oxide NPs occur widely in nature, such as in water bodies, air, soils, and sediments. They have a large surface area and high surface activity, allowing them to control and affect the speciation, migration, transformation, and bioavailability of some contaminants and nutrients in the environment. The nano-size is a unique property of nanoparticles. The size of particles regulates and determines the structure and physicochemical properties of nano-oxides, which greatly affects interfacial reactions with the relevant elements and environmental geochemical behaviors. The effects of NPs size on the environmental geochemical behaviors, such as adsorption, (reductive) dissolution, (catalytic) oxidation, aggregation and transport, are briefly summarized, and the mechanism of the size effect is discussed. Finally, hot spots for future research of metal oxide nanoparticles related to size effects in the environment are proposed.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:72
Main heading:Metal nanoparticles
Controlled terms:Adsorption - Agglomeration - Biochemistry - Catalytic oxidation - Dissolution - Geochemistry - Metallic compounds - Metals - Nanoparticles - Sediments  - Size determination
Uncontrolled terms:Catalytic - Environmental behavior - Metal oxides - Size effects - Transport
Classification code:481.2  Geochemistry - 483  Soil Mechanics and Foundations - 761  Nanotechnology - 801.2  Biochemistry - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals
DOI:10.13227/j.hjkx.201710245

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 238>

Accession number:20184205948070
Title:Differences in Diffusive Fluxes of Nutrients from Sediment Between the Natural River Areas and Reservoirs in the Lancang River Basin
Authors:Wang, Xue (1); Cheng, Bao (1); Yang, Zheng-Jian (1); Liu, De-Fu (1); Xu, Ya-Qian (1) 
Author affiliation:(1) Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan; 430068, China 
Corresponding author:Yang, Zheng-Jian(Yangjian198422@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2126-2134
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A field survey was carried out to investigate the diffusive fluxes of nitrogen and phosphorus from sediment in the natural river areas and cascaded reservoirs in the Lancang River Basin from February through March in 2017. In the natural river areas, the mean value of total nitrogen (TN) concentrations in the sediment pore water was about 15.254 mg&bull;L<sup>-1</sup>, and the total phosphorus (TP) was only 0.654 mg&bull;L<sup>-1</sup>; while in the reservoirs, the mean value of TN and TP were 6.577 mg&bull;L<sup>-1</sup>and 1.432 mg&bull;L<sup>-1</sup>, respectively. Both nutrients in the overlying water were less than that in the sediment pore water. The mean diffusive flux of total dissolved nitrogen (DTN) was almost 2.117 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> in the natural river areas, and the mean value of total dissolved phosphorus (DTP) was 0.044 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup>, while the mean value of DTN and DTP were 0.785 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup> and 0.053 mg&bull;(m<sup>2</sup>&bull;d)<sup>-1</sup>in the reservoirs, respectively. The TN content reaches the maximum in the overlying water-interstitial water vertical surface sediments. It was concluded that cascaded hydropower had greatly changed the nutrient exchange between the sediment and overlying water. Different hydrodynamics and varied chemical environments in the sediment could be additional causes.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:36
Main heading:Reservoirs (water)
Controlled terms:Nitrogen - Nutrients - Phosphorus - Rivers - Sediments - Water - Watersheds
Uncontrolled terms:Cascaded reservoirs - Chemical environment - Diffusion fluxes - Lancang River - Nitrogen and phosphorus - Sediment water interface - Space distribution - Total dissolved phosphorus
Classification code:441.2  Reservoirs - 444.1  Surface Water - 483  Soil Mechanics and Foundations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 1.43e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 1.53e-02kg/m3 to 2.20e-02kg/m3
DOI:10.13227/j.hjkx.201709054

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 239>

Accession number:20184205947835
Title:Life Cycle Environmental Impact Assessment on Different Modes of Greenhouse Vegetable Production in the North China Plain
Authors:Xu, Qiang (1); Hu, Ke-Lin (1); Li, Ji (1); Han, Hui (1); Yang, He-Fa (2) 
Author affiliation:(1) Key Laboratory of Arable Land Conservation in North China, College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China; (2) Quzhou Experimental Station, China Agricultural University, Quzhou; 057250, China 
Corresponding author:Hu, Ke-Lin(hukel@cau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2480-2488
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Organic agriculture has a higher potential than traditional agriculture to reduce environmental emissions. However, heavy metals in organic manure inevitably exacerbate eco-toxicity. At present, there are few studies on systematically and comprehensively evaluating the effects of different production modes on the environmental impact of vegetable production in the North China Plain (NCP). The objective of this study is to provide a theoretical direction for reducing the negative impact of greenhouse vegetable production. In this study, we used a greenhouse eggplant production (2013-2016) as case study and conducted a field experiment in Quzhou County, Hebei Province, China. The life cycle assessment (LCA) approach was used to analyze and compare the production and environmental impacts of eggplant production under three modes: conventional, integrated, and organic. The results showed that the potential for water contamination, eutrophication, and soil contamination was high among the three modes, ranging from 82.05% to 84.02%, 10.29% to 12.32%, and 2.62% to 3.48%, respectively. This is occurred mainly in the arable farming subsystem and is attributed to the loss of nitrogen (N) and phosphorus (P), pesticide residues, and heavy metals in organic manure. The environmental impact index of the integrated mode is the lowest, with a value of 0.596, which is 30.3% and 6.7% lower than those of the conventional and organic modes. The integrated mode significantly reduces the emission of pollutants from the greenhouse vegetable production in the arable farming subsystem; therefore, it is the best management practice. In the integrated mode, the environmental costs of producing one ton of eggplant are 46.6 J for energy depletion, 81.9 m<sup>2</sup> for land occupation, 0.004 6 m<sup>3</sup> for water depletion, 0.005 4 kg (CO<inf>2</inf>-eq) for global warming, 0.006 0 kg (SO<inf>2</inf>-eq) for acidification, 0.073 5 kg (PO<inf>4</inf>-eq) for aquatic eutrophication, 2.84E-05 kg (1,4-DCB-eq) for human toxicity, 0.489 2 kg (1,4-DCB-eq) for aquatic eco-toxicity, and 0.017 4 kg (1,4-DCB-eq) for soil eco-toxicity. Optimizing field management measures such as the application of biological pesticides, using high quality organic fertilizer, and improving the efficiency of N and P use, can better control the negative environmental impacts in the life cycle of vegetable production and improve environmental sustainability in the NCP.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:43
Main heading:Life cycle
Controlled terms:Environmental impact - Environmental impact assessments - Eutrophication - Fertilizers - Global warming - Greenhouses - Heavy metals - Landforms - Manures - Pesticides  - Sustainable development - Toxicity - Vegetables - Water pollution
Uncontrolled terms:Best management practices - Environmental emissions - Environmental sustainability - Greenhouse vegetables - Life Cycle Assessment (LCA) - Life-cycle environmental impact - North China Plain - Vegetable productions
Classification code:443.1  Atmospheric Properties - 453  Water Pollution - 454.2  Environmental Impact and Protection - 461.7  Health Care - 481.1  Geology - 531  Metallurgy and Metallography - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Area 8.19e+01m2, Energy 4.66e+01J, Percentage 2.62e+00% to 3.48e+00%, Percentage 3.03e+01%, Percentage 6.70e+00%, Percentage 8.20e+01% to 8.40e+01%
DOI:10.13227/j.hjkx.201710007

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 240>

Accession number:20184205948060
Title:Research of Parameter Uncertainty for the HSPF Model Under Different Temporal Scales
Authors:Pang, Shu-Jiang (1); Wang, Xiao-Yan (1, 2); Ma, Wen-Jing (3) 
Author affiliation:(1) College of Resource Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Research Center of Aquatic Environment in the Capital Region, Capital Normal University, Beijing; 100048, China; (3) Nanjing Smartwater Environmental Technology Co., Ltd., Nanjing; 210012, China 
Corresponding author:Wang, Xiao-Yan(wangxy@cnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2030-2038
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Various hydrological models have been applied to the management of water resources and water quality. However, parameter uncertainty is of perpetual interest in the application of hydrological models. In this context, the HSPF model was constructed and calibrated using monthly observed stream data from 1998 to 2010 in the Chaohe River watershed, northeast of Beijing. Specifically, the sensitivity and uncertainty of the model parameters were investigated by the GLUE algorithm with the PEST platform. The major results were illustrated as follows: &#9312; the hydrological simulation shows good performance with Nash-Sutcliffe efficiency of 0.84 and 0.55 in the period of calibration and validation, respectively; &#9313; the parameters were divided into three categories: global sensitive parameters (LZSN, INFILT, IRC, and AGWRC), regional sensitive parameters (UZSN), and non-sensitive parameters (DEEPFR, BASETP, AGWEPT, INTFW, and CEPSC); &#9314; strong correlations were detected within the sensitive parameters, which further involved significant negative correlations (LZSN~INFILT, INFILT~UZSN, and UZSN~AGWRC) and a positive correlation(LZSN~UZSN) and (UZSN~AGWRC); &#9315; the equifinality for different parameters was found in the HSPF model, indicating that parameter sets determine the simulation performance rather than individual parameters; &#9316; among various external factors, precipitation was identified as the most important condition for simulation uncertainty; and &#9317; the temporal difference in simulation performance was considered using annual, seasonal, and monthly scales with simulation precisions of 81.80%, 78.70%, and 80.56%, implying that the annual scale might be the optimal simulation period with higher accuracy. This research result is useful for the application and localization of the HSPF model.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Rivers
Controlled terms:Water management - Water quality - Watersheds
Uncontrolled terms:HSPF models - Hydrological simulations - River watersheds - Temporal scale - Uncertainty
Classification code:444.1  Surface Water - 445.2  Water Analysis
Numerical data indexing:Percentage 7.87e+01%, Percentage 8.06e+01%, Percentage 8.18e+01%
DOI:10.13227/j.hjkx.201710070

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 241>

Accession number:20184205947410
Title:Effect of Calcium Silicate-biological Humus Fertilizer Composite on Uptake of Cd by Shallots from Contaminated Agricultural Soil
Authors:Liu, De-Ling (1, 2); Yin, Guang-Cai (1); Chen, Zhi-Liang (2); Lin, Qin-Tie (1); Liu, Qian-Jun (1); Zhong, Song-Xiong (2, 3); Huang, Ling (2); Zhang, Jian-Qiang (2) 
Author affiliation:(1) School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou; 510006, China; (2) South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou; 510655, China; (3) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou; 510640, China 
Corresponding author:Chen, Zhi-Liang(chenzhiliang@scies.org)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2927-2935
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The safety of vegetable production is a key link in reducing cadmium consumption through the food chains. Field experiments were conducted to investigate the effects of composite materials (calcium silicate-biological humus fertilizer) on the growth of shallots and the uptake of Cd by shallots from contaminated agricultural soil. Four treatments (T1: 0.5% calcium silicate+0.5% biological humus fertilizer; T2: 0.5% calcium silicate+1.0% biological humus fertilizer; T3: 1.0% calcium silicate+0.5% biological humus fertilizer; and T4: 1.0% calcium silicate+1.0% biological humus fertilizer) and a control group (CK) were adopted. The changes in soil pH, DTPA-extractable Cd, biomass of shallots, and cadmium concentrations in shallots over time under different treatments were analyzed. The results show that the application of composite amendments decreased the concentrations of DTPA-extractable Cd in the soil. In particular, after T3 treatment, the concentrations of soil DTPA-extractable Cd decreased by 60.71%, 49.54%, 44.63%, and 58.94% after 14, 28, 42, and 56 d, respectively. The biomass of the shallots aboveground increased significantly by 107.99% and 107.19% after T3 and T4 treatment, respectively. The composite amendments exhibited different effects on the uptake of Cd by the shallots from the soil, and the T4 treatment was the most effective in immobilizing Cd and inhibiting translocation of Cd into the shallots. The cadmium concentration in the shallots decreased by 43.80% after 56 d with the T4 treatment. In conclusion, T4 is the optimum treatment for soil cadmium immobilization.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:54
Main heading:Calcium silicate
Controlled terms:Agriculture - Biological materials - Cadmium - Cadmium compounds - Chemical contamination - Fertilizers - Food safety - Silicates - Soil pollution - Soils
Uncontrolled terms:Agricultural soils - Control groups - Different effects - Different treatments - DTPA-extractable - Field experiment - Shallots - Vegetable productions
Classification code:461.2  Biological Materials and Tissue Engineering - 483.1  Soils and Soil Mechanics - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804  Chemical Products Generally - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 822.3  Food Products
Numerical data indexing:Percentage 1.00e+00%, Percentage 1.07e+02%, Percentage 1.08e+02%, Percentage 4.38e+01%, Percentage 4.46e+01%, Percentage 4.95e+01%, Percentage 5.00e-01%, Percentage 5.89e+01%, Percentage 6.07e+01%
DOI:10.13227/j.hjkx.201709178

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 242>

Accession number:20184205948058
Title:Methods for Determining and Applications of High-Resolution Vehicle Emission Inventory at County Scale
Authors:Fan, Shou-Bin (1, 2); Guo, Jin-Jin (1); Li, Xue-Feng (1, 2) 
Author affiliation:(1) Beijing Municipal Research Institute of Environmental Protection, Beijing; 100037, China; (2) National Engineering Research Center of Urban Environmental Pollution Control, Beijing; 100037, China 
Corresponding author:Li, Xue-Feng(lixuefeng@cee.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2015-2022
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study proposes a method for high-resolution vehicle emission inventories at county scale based on field investigations and Google Earth satellite images, using the Tongzhou district of Beijing as an example for data analysis. VKT and the corresponding emissions of each pollutant were calculated using the number of registered vehicles and the real-time traffic volumes, respectively. The results showed that the mileage calculated based on the method using registered vehicles is about 37% less than that based on real-time traffic volumes, with the latter method providing data closer to the actual situation. The mileage for small passenger cars, large passenger vehicles, and medium-duty trucks were underestimated, and that for light trucks, heavy trucks, low-speed trucks were overestimated based on the registered vehicle method. Emissions from small passenger cars were also underestimated by about 51%, using the registered vehicle method. For emissions of large passenger vehicles, light trucks, and medium-duty trucks, there was less difference between the two methods. Based on the registered vehicle method, emissions of heavy trucks, low-speed trucks, and motorcycles were overestimated by about 41%, 30%, and 30%, respectively.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:35
Main heading:Automobiles
Controlled terms:Trucks
Uncontrolled terms:County scale - Emission inventories - High resolution - Motor vehicle - Traffic flow
Classification code:662.1  Automobiles - 663.1  Heavy Duty Motor Vehicles
Numerical data indexing:Percentage 3.00e+01%, Percentage 3.70e+01%, Percentage 4.10e+01%, Percentage 5.10e+01%
DOI:10.13227/j.hjkx.201709083

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 243>

Accession number:20184205947389
Title:Phosphate Removal on Zirconium Alginate/Poly(N-isopropyl acrylamide) Hydrogel Beads with a Semi-interpenetrating Network
Authors:Zeng, Xue-Yang (1); Luo, Hua-Yong (1); Zhang, Yao-Kun (2); Rong, Hong-Wei (1); Zeng, Zi-Jun (1); Zhong, Guang-Hui (1) 
Author affiliation:(1) School of Civil Engineering, Guangzhou University, Guangzhou; 510006, China; (2) Shenzhen Capol Co., Ltd., Guangzhou Branch, Guangzhou; 510655, China 
Corresponding author:Rong, Hong-Wei(rhwcn@139.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2748-2755
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Zirconium alginate/poly(N-isopropyl acrylamide) hydrogel beads with a semi-interpenetrating network (ZA/PNIPAM) were prepared by using the ionic crosslinking and radical polymerization method and investigated for phosphate removal from aqueous solutions. The effects on the adsorption performance of hydrogel beads, including initial pH, adsorbent dose, initial phosphate concentration, and co-existing anions, were evaluated systematically. Results showed that the ZA/PNIPAM could exhibit a maximum uptake capacity of phosphate at pH 2.The uptake capacity of the adsorbent increased with a decrease in the dose or an increase in the initial phosphate concentration. The presence of SO<inf>4</inf><sup>2-</sup> had a more negative effect on phosphate removal compared to Cl<sup>-</sup> and NO<inf>3</inf><sup>-</sup>. The kinetics fitted a pseudo-second-order model and intraparticle diffusion model, suggesting the adsorption rate was mainly controlled by surface adsorption and diffusion into the interior of the hydrogel beads. The isotherm data could be described by the Freundlich model, indicating that the adsorption process was heterogeneous multilayer adsorption. The studies of FTIR, XPS, and zero point of charge with relevant adsorption data revealed that the phosphate adsorption mechanisms could be electrostatic attraction (physical adsorption) and ligand exchange reactions (chemical adsorption). After four cycles of regeneration, ZA/PNIPAM exhibited a stable uptake capacity, indicating favorable reusability.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Adsorption
Controlled terms:Acrylic monomers - Alginate - Amides - Crosslinking - Dyes - Hydrogels - Interpenetrating polymer networks - Phosphates - Polymerization - Reusability  - Solutions - Zirconium
Uncontrolled terms:Electrostatic attractions - Hydrogel beads - Intraparticle diffusion models - Ligand exchange reactions - N-isopropylacrylamides - Pseudo-second order model - Semi-interpenetrating - Semi-interpenetrating networks
Classification code:549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2  Chemical Reactions - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 815.1  Polymeric Materials - 815.2  Polymerization
DOI:10.13227/j.hjkx.201711071

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 244>

Accession number:20184205947392
Title:Performance of the Removal of Nitrogen During Anaerobic Ammonia Oxidation Using Different Operational Strategies
Authors:An, Fang-Jiao (1); Peng, Yong-Zhen (2); Dong, Zhi-Long (1); Shao, Zhao-Wei (1); Zhao, Zhi-Chao (1); Huang, Jian-Ming (1); Chen, Yong-Zhi (1) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, Beijing University of Technology, Beijing; 100124, China 
Corresponding author:Chen, Yong-Zhi(476411589@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2770-2777
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effects of low substrate ratio, cooling methods, and pH on nitrogen removal performance were studied in a laboratory-scale anaerobic ammonium oxidation reactor (ASBR) while treating simulated domestic waste water. The results illustrated that the average removal efficiencies of NH<inf>4</inf><sup>+</sup>-N and NO<inf>2</inf><sup>-</sup>-N increased from 54.4% and 65.3% to 95.8% and 92.5%, respectively, at a temperature of 30&#8451;and an influent concentration of NO<inf>2</inf><sup>-</sup>-N of (30&plusmn;0.2)mg&bull;L<sup>-1</sup>. The substrate ratio (NO<inf>2</inf><sup>-</sup>-N/NH<inf>4</inf><sup>+</sup>-N) increased from 0.9 to 1.4.However, the removal efficiency of NH<inf>4</inf><sup>+</sup>-N was affected negligibly, and the average removal efficiency of NO<inf>2</inf><sup>-</sup>-N decreased to 54.6% when the substrate ratio was increased to 1.6, suggesting that the nitrogen removal performance of anaerobic ammonium oxidation was best when the substrate ratio was close to the theoretical value of 1.32.The average removal efficiencies of NH<inf>4</inf><sup>+</sup>-N and NO<inf>2</inf><sup>-</sup>-N decreased from 97.5% and 98.5% to 35.2% and 40.1%, respectively, when the temperature of the reactor dropped from 30&#8451; to 15&#8451; at one time. The average removal efficiencies of NH<inf>4</inf><sup>+</sup>-N and NO<inf>2</inf><sup>-</sup>-N dropped from 97.7% and 98.6% to 52.7% and 62.4%, respectively, when the ladder cooling method(30&#8451;&#12310;FY1&#12311;25&#8451;&#12310;FY1&#12311;20&#8451;&#12310;FY1&#12311;15&#8451;)was used. The average removal efficiencies of NH<inf>4</inf><sup>+</sup>-N and NO<inf>2</inf><sup>-</sup>-N increased initially and then decreased when the pH was increased gradually from 7.7 to 8.5.The highest nitrogen removal efficiency was achieved when the pH was controlled at 8.3 with a substrate ratio of NO<inf>2</inf><sup>-</sup>-N/NH<inf>4</inf><sup>+</sup>-N equal to 1.4.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:26
Main heading:Nitrogen removal
Controlled terms:Ammonia - Cooling - Efficiency - Nitrogen oxides - Oxidation - pH - Wastewater treatment - Water treatment
Uncontrolled terms:Anaerobic ammonium oxidation - ANAMMOX - Biological nitrogen removal - Cooling methods - Influent concentrations - Nitrogen removal efficiency - Operational strategies - Removal efficiencies
Classification code:445.1  Water Treatment Techniques - 452.4  Industrial Wastes Treatment and Disposal - 641.2  Heat Transfer - 801.1  Chemistry, General - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 913.1  Production Engineering
Numerical data indexing:Percentage 4.01e+01%, Percentage 5.44e+01%, Percentage 5.46e+01%, Percentage 6.24e+01%, Percentage 6.53e+01% to 9.58e+01%, Percentage 9.25e+01%, Percentage 9.75e+01%, Percentage 9.77e+01%, Percentage 9.85e+01% to 3.52e+01%, Percentage 9.86e+01% to 5.27e+01%
DOI:10.13227/j.hjkx.201711120

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 245>

Accession number:20184205948066
Title:Bioavailability of Dissolved Organic Carbon in Rivers for Typical Vegetation Types in the Permafrost Regions on the Qinghai-Tibet Plateau
Authors:Ma, Xiao-Liang (1); Liu, Gui-Min (1); Wu, Xiao-Dong (2); Xu, Hai-Yan (1); Ye, Lin-Lin (3); Zhang, Xiao-Lan (1); Bai, Wei (1) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) State Key Laboratory of Cryospheric Science, Northwest Institute of the Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; (3) School of Geography Science, Nantong University, Nantong; 226019, China 
Corresponding author:Liu, Gui-Min(liuguimin@mail.lzjtu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2086-2094
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Samples collected from 12 rivers with typical vegetation types in the permafrost regions on the Qinghai-Tibetan Plateau were incubated in the laboratory, and the relationships among the vegetation types, river discharges, the compositions of dissolved organic carbon (DOC), permafrost areas, riverine DOC concentration, biodegradability of dissolved organic carbon (BDOC), and the biodegradation kinetics were examined. The results showed that the DOC concentrations of typical vegetation types in the basin, such as alpine meadow (AM), alpine swamp meadow-alpine meadow (ASM-AM), alpine meadow-alpine steppe (AM-AS), and alpine meadow-alpine steppe-bare soil (AM-AS-BL), were (5.17&plusmn;0.21), (5.02&plusmn;0.50), (3.55&plusmn;0.25), and (2.79&plusmn;0.41) mg&bull;L<sup>-1</sup>, respectively. The values for the bioavailability of river DOC of different vegetation types were (23.54&plusmn;2.62)%, (23.66&plusmn;3.31)%, (18.17&plusmn;5.26)%, and (11.72&plusmn;15.56)%, respectively. Correspondingly, the riverine DOC aromaticity increased along with the vegetation cover, while the biodegradation and degradation rates decreased gradually. During the incubation, the reaction of BDOC was in accordance with the first-order kinetics equation. Furthermore, the BDOC in continuous permafrost regions of the rivers was greater than that in the non-continuous permafrost regions. The BDOC in higher discharges were lower than those with lower discharges. Taken together, the results suggested that the vegetation types were the main controlling factors for the BDOC, and BDOC was also related to the discharge and permafrost.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Organic carbon
Controlled terms:Biochemistry - Biodegradability - Biodegradation - Degradation - Dissolution - Permafrost - Reaction kinetics - Rivers - Stream flow - Vegetation
Uncontrolled terms:Biodegradation kinetics - Dissolved organic carbon - First-order kinetics equation - Main controlling factors - Qinghai Tibet plateau - Qinghai-Tibetan plateau - SUVA254 - Vegetation type
Classification code:407.2  Waterways - 801.2  Biochemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201709280

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 246>

Accession number:20184205948098
Title:Impact of Tourism on Bacterial Communities of Karst Underground River: A Case Study from Two Caves in Fengdu, Chongqing
Authors:L&uuml;, Xian-Fu (1); He, Qiu-Fang (1); Wang, Feng-Kang (1); Zhao, Rui-Yi (1); Zhang, Hong (1) 
Author affiliation:(1) Chongqing Key Laboratory of Karst Environment, School of Geographical Sciences, Southwest University, Chongqing; 400715, China 
Corresponding author:He, Qiu-Fang(hqfeddy@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2389-2399
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this research, the bacterial community compositions of underground water in a tourist and pristine cave were studied. Xueyu Cave and Shuiming Cave are tourist and pristine caves, respectively, in the same karst cave system located in Chongqing, southwest China. To understand the impact of tourism on bacterial community compositions in underground water that flows through the caves, filtered materials from water were collected, and 16S rDNA gene sequences were obtained by high-throughput sequencing. The Shuiming Cave (the pristine cave) had less diversity than Xueyu Cave (the tourist cave) based on the Shannon's diversity index according to Illumina operational taxonomic units (OTUs). Proteobacteria, represented mostly by &gamma;-Proteobacterium and Bacteroidetes, dominated both systems. OTUs from Shuiming Cave were dominated by 38% Proteobacteria, 24% Chlorobi, and 19% Bacteroidetes. In the Xueyu Cave, OTUs from upstream samples were comprised of 62% Proteobacteria but comprised 64% in the downstream samples. In the Xueyu Cave, Bacteroidetes accounted for 11% of the total OTUs in the upstream sample and 16% in the downstream. Among the &gamma;-Proteobacterium and Bacteroidetes, Acinetobacter, Pseudomonas spp., and Flavobacteriaceae, which are related to potentially pathogenic species, were prevalent in the Xueyu Cave, while Methylococcaceae-uncultured, Methylomonas spp., and Methylobacter, all methane-oxidizing bacteria, had high relative abundances in the Shuiming Cave. These results revealed that potentially more pathogenic bacteria are present in the stream waters from the tourist cave, which has important implications for the protection of tourist caves. The RDA analysis of the environmental factor and bacteria community in groundwater showed that the distribution of pathogenic bacteria was positively correlated with the cave air CO<inf>2</inf>, and the Spearman correlation analysis of the two environmental factors indicated that the influence of the number of tourists on the structure of the bacterial community in the groundwater was more obvious and led to the disappearance of a large number of native bacteria. We proposed that tourist caves control the number of daily tourists and that they enter in batches and increase the import and export of closed devices to avoid the cave air exchange inside and outside. In addition, it was recommended that they increase the import and export of sterilization devices to reduce tourists with bacteria and organic matter, and avoid leaving garbage in the hole to avoid cave microbial exchange inside and outside. A reduction in the fixed lighting inside caves should be required to reduce long exposure, since the tourists can bring individual source lighting.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:41
Main heading:Rivers
Controlled terms:Bacteria - Caves - Groundwater - Lighting
Uncontrolled terms:Bacterial community - Bacterial community composition - Environmental factors - High-throughput sequencing - Karst - Methane oxidizing bacterium - Operational taxonomic units - Underground rivers
Classification code:444.2  Groundwater - 481.1  Geology
Numerical data indexing:Percentage 1.10e+01%, Percentage 1.60e+01%, Percentage 1.90e+01%, Percentage 2.40e+01%, Percentage 3.80e+01%, Percentage 6.20e+01%, Percentage 6.40e+01%
DOI:10.13227/j.hjkx.201709005

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 247>

Accession number:20184205947375
Title:Source of Nitrate in Surface Water and Shallow Groundwater around Baiyangdian Lake Area Based on Hydrochemical and Stable Isotopes
Authors:Kong, Xiao-Le (1, 2); Wang, Shi-Qin (1); Ding, Fei (3); Liang, Hui-Ya (1, 2) 
Author affiliation:(1) Hebei Key Laboratory of Agricultural Water-saving, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang; 050021, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China 
Corresponding author:Wang, Shi-Qin(sqwang@sjziam.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2624-2631
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the source of nitrate in surface water and groundwater near a domestic sewage discharge river in the Baiyangdian watershed, including the Fuhe River and Baiyangdian Lake, shallow groundwater and deep groundwater samples were collected in July 2014.Water chemistry and stable isotopes (&delta;<sup>2</sup>H and &delta;<sup>18</sup>O) were used to study the relationship between the surface water and groundwater. &delta;<sup>15</sup>N was used to explore the source of nitrate. The results show that urban and rural domestic sewage discharge to Fuhe River and then experience evaporation. Shallow groundwater is affected by the Fuhe River, Baiyangdian Lake, and lateral recharge from groundwater in the Taihang Mountain area. There are 16.7% of shallow groundwater samples exceeds the NO<inf>3</inf><sup>-</sup> threshold for drinking water according to the World Health Organization standard. Due to the effect of self-purification capacity, the NO<inf>3</inf><sup>-</sup> mass concentration in the Fuhe River is higher in the upstream area than in the downstream area. Due the regional water flow from northwest to southeast, the NO<inf>3</inf><sup>-</sup> mass concentration in the shallow groundwater is higher in the south bank area than in north bank area. The shallow groundwater near the Fuhe River and Baiyangdian Lake is recharged by surface water. In addition, soil, fertilizer, and point sources are also major sources for groundwater nitrate. Urban and rural residential living and agricultural production activities are the main reasons for surface water and groundwater nitrate.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:29
Main heading:Rivers
Controlled terms:Agriculture - Flow of water - Hydrochemistry - Isotopes - Lakes - Nitrates - Potable water - Recharging (underground waters) - Rural areas - Sewage
Uncontrolled terms:Agricultural productions - Baiyangdian lakes - Domestic sewage - Isotopic - Surface water and groundwaters - Taihang Mountain area - World Health Organization - Xiong'an New Area
Classification code:444  Water Resources - 444.2  Groundwater - 452.1  Sewage - 481.2  Geochemistry - 631.1.1  Liquid Dynamics - 804.2  Inorganic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 1.67e+01%
DOI:10.13227/j.hjkx.201709149

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 248>

Accession number:20184205947398
Title:Effect of Long-term Organic Amendments on Nitric Oxide Emissions from the Summer Maize-Winter Wheat Cropping System in Guanzhong Plain
Authors:Yuan, Meng-Xuan (1); Wang, Jin-Feng (1); Tan, Yue-Hui (1); Wei, Jing (1); Yang, Xue-Yun (1); Gu, Jiang-Xin (1) 
Author affiliation:(1) College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China 
Corresponding author:Gu, Jiang-Xin(gujiangxin@nwsuaf.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2819-2826
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Agricultural soil is a significant source of nitric oxide (NO). The primary aim of this study was to quantify the effect of long-term organic amendments on NO emissions from the summer maize-winter wheat cropping system in Guanzhong Plain. NO fluxes were regularly measured by the static chamber method for one year (June 2016 to June 2017). Field experiments included four fertilizer treatments that commenced in 1990. The control (CK, 0 kg&bull;hm<sup>-2</sup>) treatment was unfertilized throughout the years. The fertilized treatments were synthetic fertilizer (NPK, 165 kg&bull;hm<sup>-2</sup>), synthetic fertilizer plus maize stalk (NPKS, (165+40) kg&bull;hm<sup>-2</sup>), and synthetic fertilizer plus dairy manure (NPKM, (50+115) kg&bull;hm<sup>-2</sup>) during the winter wheat season. They were fertilized with synthetic fertilizer (188 kg&bull;hm<sup>-2</sup>) during the summer maize season. The results showed small NO emission [&lt;12.2 g&bull;(hm<sup>2</sup>&bull;d)<sup>-1</sup>] from the CK treatment within the experimental period. Large NO fluxes [up to 112.0 g&bull;(hm<sup>2</sup>&bull;d)<sup>-1</sup> in NPK treatment] were captured following sowing and fertilization during the summer maize season and following fertilization during the winter wheat season for all fertilized treatments. Annual NO emissions and direct emission factors ranged from 0.13 to 0.57 kg&bull;hm<sup>-2</sup> and from 0.04% to 0.12%, respectively. Annual NO emissions from the NPKS and NPKM treatments were 17.6% lower and 68.0% (P&lt;0.05) larger than those from the NPK treatment, respectively. Seasonal NO emissions from the NPKS and NPKM treatments were 41.1%-60.0% (P&lt;0.05) lower than those from the NPK treatment during the winter wheat season, indicating that organic amendments reduced NO emissions. Seasonal NO emissions from the NPKS and NPKM treatments were 25.2%-292.1% (P&lt;0.05) larger than that from the NPK treatment during the summer maize season, mostly due to the positive effect of soil organic matter content on NO emissions.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Soil pollution
Controlled terms:Crops - Fertilizers - Manures - Nitric oxide
Uncontrolled terms:Dairy manures - Direct emissions - Long-term fertilization - Maize stalk - NO emissions
Classification code:483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 821.4  Agricultural Products - 821.5  Agricultural Wastes
Numerical data indexing:Percentage 1.76e+01%, Percentage 4.00e-02% to 1.20e-01%
DOI:10.13227/j.hjkx.201709262

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 249>

Accession number:20184205947378
Title:Distinguishing the Compositions and Sources of the Chromophoric Dissolved Organic Matter in a Typical Karst River During the Dry Season: A Case Study in Bitan River, Jinfo Mountain
Authors:Liu, Yue (1); He, Qiu-Fang (1, 2); Liu, Ning-Kun (1); Liu, Jiu-Chan (1); Wang, Zheng-Xiong (1); Duan, Shi-Hui (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 Land and Resource &amp; Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China 
Corresponding author:He, Qiu-Fang(hqfeddy@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2651-2660
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Since resistant dissolved organic matter (RDOM) plays a critically important role in a karst carbon sink, one of the most important continental carbon sinks, research focusing on the origination, transportation, and translation of RDOM in a karst water system is important. Currently, 3D-fluorescence EEMs are used to detect the composition and origination of chromophoric dissolved organic matter (CDOM), an important part of RDOM. This is a very fast and efficient method for CDOM analysis. In this study, 3D-fluorencence EEMs combined with UV-visible absorption spectrum were used to analyze the composition and origination of CDOM in the Bitan River at Jinfo Mountain. Samples were collected from nine sampling sites from January to March 2017 and analyzed with CDOM EEMs and UV-visible absorption spectrums. In addition hydrochemical characteristics were determined and then samples were stimulated with PARAFAC to detect the chromophoric fluorescent groups and indexes. The PARAFAC stimulation revealed three chromophoric fluorescent groups in which fulvic acid was the largest component, accounting for about 44%, with a humic acid content of about 32% and tyrosine-like acid content of about 24%. Four indexes: FI, BIX, HIX, and &beta;:&alpha;, were calculated, and the mean values were 2.06, 0.87, 4.35 and 0.69, which showed relatively high FI, BIX, and &beta;:&alpha; values and a low HIX value, implying that the CDOM was autochthonous and originated from microbes and aquatic plants in the dry season. The spatial dynamic of the index revealed an increased BIX and decreased HIX from the upstream area to the downstream area, implying the impact of land-use and human activities. The forest soil input more humic acid and agriculture input more N and P resulting in flourishing aquatic plants and microbes. Moreover, the correlation coefficients of DIC and humic acid, tyrosine-like acid were 0.515 (P&lt;0.05) and 0.644 (P&lt;0.01), from which it could be inferred that DIC contributed to CDOM formation. The conclusions of this study revealed that DIC would be fixed by karst water aquatic plants and microbes and then sink as autochthonous CDOM and become part of karst water carbon sink.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:42
Main heading:Rivers
Controlled terms:Absorption spectroscopy - Amino acids - Bacteria - Biogeochemistry - Carbon - Dissolution - Drought - Electromagnetic wave absorption - Fluorescence - Hydrochemistry  - Land use - Landforms - Organic compounds - Soils
Uncontrolled terms:Chromophoric dissolved organic matter - EEMs - Karst hydrochemistry characteristics - Karst surface - PARAFAC - UV visible absorption spectrum
Classification code:403  Urban and Regional Planning and Development - 444  Water Resources - 481.1  Geology - 481.2  Geochemistry - 483.1  Soils and Soil Mechanics - 711  Electromagnetic Waves - 741.1  Light/Optics - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Percentage 2.40e+01%, Percentage 3.20e+01%, Percentage 4.40e+01%
DOI:10.13227/j.hjkx.201711106

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 250>

Accession number:20184205947370
Title:Health Assessment of the Stream Ecosystem in the North Canal River Basin, Beijing, China
Authors:Gu, Xiao-Yun (1, 2, 3); Xu, Zong-Xue (2, 3); Liu, Lin-Fei (2, 3); Yin, Xu-Wang (1); Wang, Mi (1) 
Author affiliation:(1) Liaoning Provincial Key Laboratory for Hydrobiology, College of Fisheries and Life Science, Dalian Ocean University, Dalian; 116023, China; (2) College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (3) Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing; 100875, China 
Corresponding author:Xu, Zong-Xue(zxxu@bnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2576-2587
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:With increasing urbanization, the stream ecosystem in Beijing has faced great challenges. Phytoplankton, benthic macroinvertebrates, and water quality were investigated based on 25 sampling sites in the North Canal River basin in July 2015, and the quality of the habitat was assessed in situ. A total of 22 metrics, including aquatic organism, hydrology, water quality, and habitat, were calculated to be the candidate indicators. A principal component analysis (PCA) and correlation analysis were used to select the core metrics from the candidate indicators, and the weight of each core metric was estimated by using the entropy method. The integrated index of stream ecological health was constructed to assess the health condition of the North Canal River basin. The results of the PCA and correlation analysis showed that nine metrics were selected as the core metrics to construct the integrated index of stream ecological health, i. e., the Shannon-Wiener diversity index of phytoplankton and benthic macroinvertebrates, water temperature, BOD<inf>5</inf>, NH<inf>4</inf><sup>+</sup>-N, F<sup>-</sup>, Zn, petroleum, and the qualitative habitat evaluation index (QHEI). According to the results of the health assessment, 12% of the sampling sites in the North Canal River basin were considered to be healthy (&#8544;) or sub-healthy (&#8545;), and more than half were poor (&#8547;) or bad (&#8548;). Therefore, the aquatic ecosystem in the North Canal River basin was generally unhealthy. The upstream was better than the midstream and downstream, where the spatial heterogeneity of the health condition was strong. The health condition in the Nansha River, the midstream of the Qinghe River, and the main stream of the Tonghui River were poor, while the upstream of the Liangshui River and the tributaries of the Wenyu River were good. In general, the condition of the stream ecosystem in the North Canal River basin was relatively complicated.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:49
Main heading:Rivers
Controlled terms:Aquatic ecosystems - Aquatic organisms - Correlation methods - Health - Hydraulic structures - Petroleum analysis - Petroleum reservoir evaluation - Phytoplankton - Principal component analysis - Stream flow  - Water quality - Watersheds
Uncontrolled terms:Benthic macroinvertebrates - Correlation analysis - Entropy methods - Health assessments - River basins - Shannon-wiener diversity indices - Spatial heterogeneity - Stream ecosystems
Classification code:407.2  Waterways - 444.1  Surface Water - 445.2  Water Analysis - 454.3  Ecology and Ecosystems - 461.6  Medicine and Pharmacology - 471  Marine Science and Oceanography - 512.1.2  Petroleum Deposits : Development Operations - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.20e+01%
DOI:10.13227/j.hjkx.201706229

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 251>

Accession number:20184205947368
Title:Comparison Between Atmospheric Wet-only and Bulk Nitrogen Depositions at Two Sites in Subtropical China
Authors:Zhu, Xiao (1, 2, 3); Wang, Jie-Fei (1, 2, 3); Shen, Jian-Lin (1, 2); Xiao, Run-Lin (1, 2); Wang, Juan (1, 2); Wu, Jin-Shui (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 &amp; Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Shen, Jian-Lin(jlshen@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2557-2565
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Atmospheric emissions of reactive nitrogen (N) species are at high levels and have caused high N deposition in China in recent years. In this study, atmospheric wet-only and bulk N depositions were monitored simultaneously in a two-year study at an agricultural site (HN) and a forest site (XS) in the Jinjing River catchment in Changsha County, Hunan Province in subtropical China. The differences in concentration and deposition of NH<inf>4</inf><sup>+</sup>-N, NO<inf>3</inf><sup>-</sup>-N, DON, and TN between wet-only and bulk N depositions were compared, and the correlation between wet-only and bulk N depositions was analyzed, with the aim of estimating atmospheric wet N deposition based on bulk N deposition. During the monitoring period, NH<inf>4</inf><sup>+</sup>-N was the dominant species in both wet-only and bulk deposition at the sampling sites. The average values of total N (TN) depositions for wet-only and bulk depositions at HN were 26.2 and 28.9 kg&bull;(hm<sup>2</sup>&bull;a)<sup>-1</sup>, respectively. The proportions of NH<inf>4</inf><sup>+</sup>-N, NO<inf>3</inf><sup>-</sup>-N, and DON in TN in wet-only deposition were 49.7%, 31.3%, and 19.0%, respectively, while the proportions in the bulk deposition were 48.7%, 31.6%, and 19.7%, respectively. The average values of TN depositions for wet-only and bulk depositions at XS were 23.6 and 27.8 kg&bull;(hm<sup>2</sup>&bull;a)<sup>-1</sup>, respectively. The proportions of NH<inf>4</inf><sup>+</sup>-N, NO<inf>3</inf><sup>-</sup>-N, and DON in TN in wet-only deposition were 53.9%, 34.78%, and 11.4%, respectively, while they were 49.6%, 31.6%, and 18.9%, respectively, for bulk deposition. The concentrations of N species in wet-only and bulk depositions were significantly and negatively correlated with precipitation, while the amount of N deposition was significantly and positively correlated with precipitation. The concentrations of N species in wet-only deposition had a significant linear correlation with those in the bulk deposition at the two sites (R<sup>2</sup>&gt;0.82). According to the regression equation for wet-only and bulk N deposition at the monitoring sites, the proportions of NH<inf>4</inf><sup>+</sup>-N, NO<inf>3</inf><sup>-</sup>-N, and TN in wet-only to bulk deposition were 0.875, 0.774, and 0.852, respectively, at HN and 0.859, 0.783, and 0.819, respectively, at XS. These values were mainly related to the amount of wet-only N deposition and the pollution level of atmospheric particulate N species at the monitoring sites. In the subtropical region of China, atmospheric wet N deposition can be overestimated by 10% to 18% when the atmospheric bulk N deposition is used to replace the wet N deposition. Based on the regression equation between atmospheric bulk N deposition and wet N deposition, the atmospheric wet N deposition can be estimated well using the atmospheric bulk N deposition data.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Ecosystems
Controlled terms:Catchments - Forestry - Nitrogen - River pollution - Tropics
Uncontrolled terms:Agro ecosystems - Atmospheric emission - Atmospheric particulate - Bulk depositions - Forest ecosystem - N deposition - Nitrogen deposition - Subtropical regions
Classification code:443  Meteorology - 453  Water Pollution - 454.3  Ecology and Ecosystems - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.00e+01% to 1.80e+01%, Percentage 1.14e+01%, Percentage 1.89e+01%, Percentage 1.90e+01%, Percentage 1.97e+01%, Percentage 3.13e+01%, Percentage 3.16e+01%, Percentage 3.48e+01%, Percentage 4.87e+01%, Percentage 4.96e+01%, Percentage 4.97e+01%, Percentage 5.39e+01%
DOI:10.13227/j.hjkx.201710127

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 252>

Accession number:20184205948087
Title:Effects of Heat and Heat-alkaline Treatments on Disintegration and Dissolved Organic Matter in Sludge
Authors:Dai, Qin (1, 2); Zhang, Wen-Zhe (1, 2); Yu, Pan-Fen (3); Yi, Hao (4); Liu, Jun-Xin (1, 2); Xiao, Ben-Yi (1, 2) 
Author affiliation:(1) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Textile and Apparel, Qingdao University, Qingdao; 266071, China; (4) South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou; 510655, China 
Corresponding author:Xiao, Ben-Yi(byxiao@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2283-2288
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The hydrolysis of sludge organic matter is the rate-limiting step of anaerobic sludge digestion. Because pretreatments can effectively convert the solid organic matter into dissolved organic matter, it can improve the degradation rate and methane conversion rate of organic matter. In this study, the effects of heat and heat-alkaline treatments (two common pretreatments) on the composition, relative molecular weight distribution, and structure of dissolved organic matter in sludge were studied. The results showed that the heat and heat-alkaline treatments released a large amount of organic matter, which resulted in the SCOD increasing 21.9 times (heat treatment) and 47.8 times (heat-alkaline treatment). These pretreatments changed the molecular weight distribution of dissolved organic matter and decreased the molecular weight of the organic matter to the greatest degree. The results of three-dimensional fluorescence spectroscopy showed that both of the pretreatments can hydrolyze protein, the main component of sludge soluble organic matter, with the heat-alkaline treatment being more significant. In dissolved organic matter, the byproducts of the microorganisms and humic acids are not easily hydrolyzed further by the two pretreatments. In addition, the two pretreatments led to the appearance of new organic structures and the change and even disappearance of the original organic matter.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Biological materials
Controlled terms:Anaerobic digestion - Biogeochemistry - Byproducts - Degradation - Disintegration - Dissolution - Fluorescence spectroscopy - Hydrolysis - Molecular weight distribution - Organic compounds  - Sludge digestion
Uncontrolled terms:Anaerobic sludge digestion - Dissolved organic matters - Organic structures - Pre-Treatment - Sludge disintegration - Solid organic matter - Soluble organic matters - Three-dimensional fluorescence spectroscopies
Classification code:452.2  Sewage Treatment - 461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 741.3  Optical Devices and Systems - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 931.3  Atomic and Molecular Physics
DOI:10.13227/j.hjkx.201709052

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 253>

Accession number:20184205947204
Title:Discussion of Emissions and Health Risk of Polycyclic Aromatic Hydrocarbons (PAHs) from the Retreading Process of Waste Tires
Authors:Fu, Jian-Ping (1); Zhao, Bo (1); Li, Yu-Qing (1); Liu, Sha-Sha (1); Yin, Wen-Hua (1); Huang, Jing-Qiong (1); Zhou, Chang-Feng (1); Zhang, Su-Kun (1); He, De-Chun (1); Han, Jing-Lei (1) 
Author affiliation:(1) South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou; 510655, China 
Corresponding author:Han, Jing-Lei(hanjinglei@scies.org)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2963-2970
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The emissions characteristics of 16 kinds of polycyclic aromatic hydrocarbons (PAHs) in ambient air during the waste tire retreading process (open-air storage, mixing, vulcanization, and grinding processes) and in workers' dormitory were analyzed. In addition, the occupational health risk of the workers was evaluated. Results showed that PAHs were detected in all retreading processes and in the workers' dormitory. The highest concentration site was the mixing process, followed by open-air storage and vulcanization process. The lowest concentration point was in the grinding process. The average concentration of PAHs in the workers' dormitory was 11.1 ng&bull;m<sup>-3</sup>. The PAHs at all sampling points were largely phenanthrene (Phe), fluoranthene (Flu), anthracene (Ant), and pyrene (Pry), which also had a stronger linear correlation with the total PAH concentration. An analysis of the benzene rings showed that three ring and four ring were the majority, while two ring, five ring, and six ring components accounted for less than 10%. Results of the possible influencing factors of the PAHs revealed that the open-air storage and dormitory might be affected by a combustion source, but the mixing, vulcanization, and grinding processes might be affected by rubber oil. The principal component analysis (PCA) and cluster analysis showed that the spatial location of all sites would significantly influence the distribution of PAHs during the tire retreading process. The health risk assessment showed that occupational workers had a lower risk of lifelong cancer, and there was little influence on life expectancy.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:38
Main heading:Retreading
Controlled terms:Anthracene - Aromatization - Cluster analysis - Grinding (machining) - Health - Health risks - Hydrocarbons - Industrial hygiene - Mineral oils - Mixing  - Occupational risks - Principal component analysis - Risk assessment - Rubber - School buildings - Vulcanization - Waste incineration
Uncontrolled terms:Ambient air - Average concentration - Combustion sources - Emissions characteristics - Occupational health risk - Polycyclic aromatic hydrocarbons (PAHS) - Vulcanization process - Waste tires
Classification code:402.2  Public Buildings - 452.4  Industrial Wastes Treatment and Disposal - 461.6  Medicine and Pharmacology - 461.7  Health Care - 513.3  Petroleum Products - 604.2  Machining Operations - 723  Computer Software, Data Handling and Applications - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 818.1  Natural Rubber - 818.5  Rubber Products - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.00e+01%
DOI:10.13227/j.hjkx.201710025

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 254>

Accession number:20184205948068
Title:Migration and Transformation of Dissolved Organic Matter in Karst Water Systems and an Analysis of Their Influencing Factors
Authors:Zhang, Lian-Kai (1, 2, 3); Liu, Peng-Yu (1); Qin, Xiao-Qun (1); Shan, Xiao-Jing (2, 4); Liu, Wen (5); Zhao, Zhen-Hua (5); Yao, Xin (6); Shao, Ming-Yu (1, 2) 
Author affiliation:(1) Key Laboratory of Karst Dynamics, Ministry of Land and Resources &amp; Guangxi, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Guilin; 541004, China; (3) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China; (4) School of Environmental Science and Engineering, Qingdao University, Qingdao; 266071, China; (5) Shandong Provincial Geo-mineral Engineering Exploration Institute, Ji'nan; 250014, China; (6) School of Environmental and Planning, Liaocheng University, Liaocheng; 252059, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2104-2116
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Fluorescent substances are used as good tracers in dissolved organic matter (DOM) to identify the source of DOM and its geochemical behavior in a hydrological system. However, there are few studies on the karst aquifer system. Many parameters in karst systems affect the DOM spectral information. A typical karst watershed in Northern China was selected in this research. Excitation-emission matrices (EEMs), parallel factor analysis (PARAFAC), and hydrochemical data were applied to reveal the relationship between the composition and transformation of DOM fluorescent substances in different karst water-bearing spaces. The source of DOM and the effect of water chemistry on DOM transfer were also discussed. The results showed that DOM in exogenous surface water and karst surface water in the Yufu River watershed were mainly composed of tryptophan-like substances, while the DOM in shallow karst water and deep karst water consisted of tryptophan-like and tyrosine-like substances. A comprehensive analysis by fluorescence index (FI), biological index (BIX), and humification index (HIX) displayed that the DOM in shallow and deep karst water resulted from microbial decomposition. In contrast, the DOM in karst surface water and exogenous surface water resulted from land-based input and endogenous microbial decomposition, in which endogenous contributions occupy a large proportion. Due to the chemical parameters of karst water, these three kinds of fluorescent substances extracted by PARAFAC had obviously different characteristics, i.e., &#9312; the tyrosine-like substances had a strong adaptability to Ca<sup>2+</sup> and HCO<inf>3</inf><sup>-</sup>, and the proportion of the tyrosine in karst water was relatively large; &#9313; the tryptophan substance followed an opposite trend; and &#9314; there was a significant positive correlation between fulvic acid and TDS, turbidity, Cl<sup>-</sup>, and SO<inf>4</inf><sup>2-</sup>. Observations of the watershed runoff revealed that the DOM in shallow karst water in the upper reaches came mainly from the soil and microbial degradation. The organic matter underwent a large amount of microbial decomposition and exogenous input when the water was rejuvenated with springs. After infiltration to the deep karst water in the lower reaches, the DOM gradually were converted to low aromatic hydrocarbon organic compounds and decreased macromolecules of DOM. Subsequently, the fluorescence intensity was weakened. The principal component analysis (PCA) extracted three principal components. They were the water mineralization index, soil leaching index, and hydrochemical/biochemical process index. The water mineralization index consists of hydrochemical parameters reflecting the water infiltration, transformation, and flow conditions in the karst system. The soil leaching index contains TOC, NO<inf>3</inf><sup>-</sup>, and protein-like indicators relating to the relationship between protein-like substances and soil and natural leaching. The hydrochemical/biochemical process index is composed of Ca<sup>2+</sup>, HCO<inf>3</inf><sup>-</sup>, FI, and fulvic acid indicators that illustrate the water chemistry and biochemical processes in the karst water system. In addition, the study also showed that total fluorescence intensity, fulvate-like substances, and protein-like substances can be used as a tracer for rapid seepage, transformation, and aquifer fragility for karst water, respectively. The results of the study are important in understanding the biogeochemical cycle of DOM in the karst water system and also helpful for controlling organic pollution. It also provides a new tool for characterizing the geochemical processes of organic matter in karst system.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:53
Main heading:Infiltration
Controlled terms:Amino acids - Aquifers - Aromatic hydrocarbons - Biodegradation - Biogeochemistry - Catchments - Chemical analysis - Decomposition - Degradation - Dissolution  - Factor analysis - Fluorescence - Fluorescence spectroscopy - Hydrochemistry - Landforms - Leaching - Linear transformations - Metadata - Mineralogy - Principal component analysis  - Proteins - River pollution - Soils - Surface waters - Watersheds - Waterworks
Uncontrolled terms:Dissolved organic matters - Excitation emission matrices - Fluorescence intensities - Humification index (HIX) - Karst aquifer - Migration and transformation - Parallel factor analysis - Three-dimensional fluorescence spectroscopies
Classification code:444.1  Surface Water - 444.2  Groundwater - 446  Waterworks - 453  Water Pollution - 461.8  Biotechnology - 481.1  Geology - 481.2  Geochemistry - 482  Mineralogy - 483.1  Soils and Soil Mechanics - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 921.3  Mathematical Transformations - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201709255

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 255>

Accession number:20184205947394
Title:Changes in Heavy Metal Speciation and Release Behavior Before and After Sludge Composting Under a Phosphate-rich Atmosphere
Authors:Li, Yu (1, 2); Fang, Wen (2, 3); Qi, Guang-Xia (2, 4); Wei, Yong-Hong (2); Liu, Jian-Guo (2); Li, Run-Dong (1) 
Author affiliation:(1) Key Laboratory of Clean Energy, College of Energy and Environment, Shenyang Aerospace University, Shenyang; 110136, China; (2) Key Laboratory for Solid Waste Management and Environment Safety (Tsinghua University), Ministry of Education, Tsinghua University, Beijing; 100084, China; (3) State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing; 210023, China; (4) Department of Environmental Science and Engineering, Beijing Technology and Business University, Beijing; 100048, China 
Corresponding author:Liu, Jian-Guo(jgliu@tsinghua.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2786-2793
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sewage sludge is rich in organic matter, N, and P and could be used as a soil amendment to improve the status of soil organic matter, soil structural characteristics, and soil water retention capacity after aerobic composting. However, heavy metals in sewage sludge have become the main bottleneck limiting its land application. In addition, with the large-scale exploitation of phosphate rock resources in our region of interest, a large amount of phosphate tailings needs to be disposed and a large area of abandoned mining lands needs to be reclaimed. Phosphate tailings could be auxiliary materials for sewage sludge composting to immobilize heavy metals, and the compost could be applied for revegetation of the abandoned mining lands. The contents of As, Cr, Cu, Ni, Pb, Cd, and Zn were measured, and a successive extraction procedure was used to investigate the change in speciation of heavy metals in the sludge before and after the phosphate-rich composting. pH-dependent leaching tests were carried out to further evaluate the immobilization effects of composting on heavy metals and the release potential under different pH conditions. The results showed that the contents of heavy metals in the compost satisfied the corresponding threshold for land reclamation. Adding phosphate tailings greatly improved the stability of heavy metals during the composting process. The portion of stable residues of Pb, Cd, As, and Zn in the phosphate-rich compost was 84.00%, 58.00%, 68.50%, and 30.93%, respectively, compared with 68.10%, 30.50%, 40.32%, and 16.48% for the control, compost without adding the phosphate tailings. Meanwhile, the maximum leaching potential of As, Ni, Pb, Zn, and Cu in the phosphate-rich compost decreased from 3.692 mg&bull;kg<sup>-1</sup>, 0.903 mg&bull;kg<sup>-1</sup>, 0.217 mg&bull;kg<sup>-1</sup>, 7.225 mg&bull;kg<sup>-1</sup>, and 8.725 mg&bull;kg<sup>-1</sup> to 0.684 mg&bull;kg<sup>-1</sup>, 0.586 mg&bull;kg<sup>-1</sup>, 0.071 mg&bull;kg<sup>-1</sup>, 2.603 mg&bull;kg<sup>-1</sup>, and 6.935 mg&bull;kg<sup>-1</sup>in the control, respectively, for pH 6-8.It could be concluded that the addition of phosphate tailings in the sludge composting lowered the risk of heavy metals in sewage sludge compost to make it favorable for beneficial use in abandoned mining land reclamation.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:33
Main heading:Zinc compounds
Controlled terms:Biogeochemistry - Biological materials - Composting - Copper compounds - Heavy metals - Image segmentation - Land use - Leaching - Organic compounds - pH  - Reclamation - Revegetation - Sewage sludge - Soil conservation - Soil moisture - Tailings disposal
Uncontrolled terms:Heavy metal speciation - Immobilization effects - Leaching characteristics - pH value - Sewage sludge compost - Sewage sludge composting - Structural characteristics - Successive extractions
Classification code:403  Urban and Regional Planning and Development - 442.2  Land Reclamation - 452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 801.1  Chemistry, General - 801.2  Biochemistry - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Percentage 1.65e+01%, Percentage 3.05e+01%, Percentage 3.09e+01%, Percentage 4.03e+01%, Percentage 5.80e+01%, Percentage 6.81e+01%, Percentage 6.85e+01%, Percentage 8.40e+01%
DOI:10.13227/j.hjkx.201711069

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 256>

Accession number:20184205947384
Title:Purification Effect of Submerged Macrophyte System with Different Plants Combinations and C/N Ratios
Authors:Liu, Miao (1, 2); Chen, Kai-Ning (1) 
Author affiliation:(1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing; 210008, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Chen, Kai-Ning(knchen@niglas.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:6
Issue date:June 15, 2018
Publication year:2018
Pages:2706-2714
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A submerged macrophyte pond can effectively remove nitrogen and phosphorus from water, with the removal efficiencies for pollutants depending on combinations of submerged macrophytes. Moreover, the material structure of sewage also has a significant impact on the purification effect of the submerged macrophyte system. This experiment selected three submerged plants (Vallisneris spiralis, Hydrilla verticillata, and Myriophyllum spicatum) to examine the purification effect of their combinations on sewage, including nitrogen and phosphorus removal efficiencies. In addition, the effect of influent C/N ratio on the submerged macrophyte pond was also tested and discussed. The results showed the following. &#9312; All plant combinations can decrease concentrations of nitrogen and phosphorus in water, resulting from nutrient deposition along with sedimentation of suspended particles. The combinations of Vallisneris spiralis and Hydrilla verticillata showed the highest purification efficiency for total nitrogen and total phosphorus with an average removal rate of 32.71% and 22.13%, respectively. &#9313; The purification effects of three C/N ratio (1.89, 5.93, and 12.09) for Vallisneris spiralis and Hydrilla verticillate system were different. The removal efficiency was highest when the C/N ratio was 5.93, with removal rates for total nitrogen and total phosphorus and a reduction in permanganate index of 81.34%, 68.26%, and 88.65%, respectively. The C/N ratio affected the degradation of nitrogen, phosphorus, and organic matter by influencing the dissolved oxygen concentration of water and changing the anaerobic and aerobic environment of the water. In conclusion, different submerged macrophyte combinations showed better purification effect than a single type of plant in the submerged plant pond system. Changing the influent C/N ratio by placing carbon source materials into the water can greatly increase the removal efficiency of submerged plant pond, providing a practical reference for the use of submerged plant ponds to treat sewage.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Nitrogen removal
Controlled terms:Biochemical oxygen demand - Dissolved oxygen - Efficiency - Lakes - Nitrogen - Purification - Sedimentation - Sewage treatment - Water pollution - Water treatment
Uncontrolled terms:C/N ratio - Dissolved oxygen concentrations - Nitrogen and phosphorus - Nitrogen and phosphorus removal - Plant combinations - Purification efficiency - Submerged macrophyte - Submerged macrophytes
Classification code:445.1  Water Treatment Techniques - 452.2  Sewage Treatment - 453  Water Pollution - 802.3  Chemical Operations - 804  Chemical Products Generally - 913.1  Production Engineering
Numerical data indexing:Percentage 2.21e+01%, Percentage 3.27e+01%, Percentage 6.83e+01%, Percentage 8.13e+01%, Percentage 8.87e+01%
DOI:10.13227/j.hjkx.201710209

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 257>

Accession number:20184205948069
Title:Source and Distribution of Dissolved Metal Ions in the Backwater Area of Pengxi River in Three Gorges Reservoir
Authors:Zhao, Xiao-Song (1, 2); Yu, Jian-Jun (1, 2); Fu, Li (1, 2); Jiang, Wei (1, 2); Zhou, Chuan (1, 2); Li, Bo (3); Haffner, Douglas (1, 4); Weisener, Christopher (4); Zhang, Lei (1, 2, 4) 
Author affiliation:(1) International Base for S&amp;T Collaboration on Water Environmental Monitoring and Simulation in TGR Region (WEMST), Chongqing; 400716, China; (2) College of Resource and Environment, Southwest University, Chongqing; 400716, China; (3) Beibei District Environmental Protection Bureau, Chongqing; 400711, China; (4) Great Lakes Institute for Environmental Research, University of Windsor, Windsor; N9B 3P4, Canada 
Corresponding author:Zhang, Lei(zhanglei5401@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2117-2125
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study uses the Gaoyang Lake section of the Pengxi River, the largest tributary on the northern bank of the Three Gorges Reservoir (TGR), as an example for exploring the distributions and dynamics of Ca, Zn, Fe, Cr, Pb, Cu, and Hg ions in the tributaries of TGR where the water level fluctuates due to dam regulation. Samples were taken 21 times, once every 17.3 days, at four sampling sites in Gaoyang Lake, which is in a perennial backwater zone of the Pengxi River, during one year from June 5, 2013 to May 29, 2014. At each sampling site, water samples were taken from the surface layer (0-0.5 m), middle layer, and bottom layer (0.5 m above the bed mud). During winter when the water was not stratified, the middle layer samples were taken at 1/2 depth, and when water was stratified in other seasons, the middle layer samples were taken from the thermal layer. Inductively coupled plasma atomic emission spectrometry (ICP-AES) and cold-vapor atomic absorption methods were adopted to determine the concentrations of the metals. Excel and SPSS were used for data analysis and Matlab for building 3-D prisms displaying concentration distributions of Hg ions in the high water level period (175 m, November-April in the ensuing year), sluicing period (May-middle June), low water level in the flooding season (145 m, June-August), and the storage period (September-November). The results provided the following observations &#9312; Concentrations of Cr, Pb, Cu, Zn, and Hg ions were lower than those in Class &#8546; of the water environment quality standard (GB 3838-2002). &#9313; Cr, Pb, and Cu had high peak values during the storage and sluicing period, and the lowest values during the high water level period. Cr, Pb, and Cu were derived from the main stream of Yangtze, while Fe and Zn were from the Pengxi River locally. The concentration of Hg ions was affected by both the main stream and endogenous sources. As the water column stratified, metal ions did not mix among the stratified layers in Gaoyang Lake. &#9314; The conductivity was significantly lower during the high water level period than during other water level periods. The main material that affects the conductivity of Gaoyang Lake could be nonmetallic ions.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:28
Main heading:Reservoirs (water)
Controlled terms:Absorption spectroscopy - Atomic emission spectroscopy - Copper - Digital storage - Inductively coupled plasma - Lakes - Mercury (metal) - Metal ions - Rivers - Water levels
Uncontrolled terms:Backwater area - Cold-vapor atomic absorptions - Concentration distributions - Dissolved metal ions - Inductively coupled plasma-atomic emission spectrometry - Spatial and temporal distribution - Three gorges reservoir - Water environments
Classification code:441.2  Reservoirs - 531.1  Metallurgy - 544.1  Copper - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 722.1  Data Storage, Equipment and Techniques - 932.3  Plasma Physics
Numerical data indexing:Age 4.74e-02yr, Size 0.00e+00m to 5.00e-01m, Size 1.45e+02m, Size 1.75e+02m, Size 5.00e-01m
DOI:10.13227/j.hjkx.201704050

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 258>

Accession number:20184205948075
Title:Nitrate Uptake Kinetics and Correlation Analysis in an Agricultural Drainage Ditch
Authors:Li, Ru-Zhong (1); Yin, Qi-He (1); Gao, Su-Di (2); Chen, Guang-Zhou (3) 
Author affiliation:(1) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei; 230009, China; (2) College of Civil and Environmental Engineering, Anhui Xinhua University, Hefei; 230088, China; (3) School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei; 230022, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2174-2183
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the whole-reach nitrate (NO<inf>3</inf><sup>-</sup>-N) uptake dynamics in a headwater agricultural stream, we performed five pulse tracer additions of a reactive solute (as KNO<inf>3</inf>) and a conservative solute (as NaBr) in an agricultural drainage ditch in Hefei district, Chaohu Lake basin, from October 2016 to April 2017. The TASCC (tracer additions for spiraling curve characterization) approach and Michaelis-Menten (M-M) method were applied for the simulation of NO<inf>3</inf><sup>-</sup>-N uptake dynamics. Results showed that the ambient areal rate of total NO<inf>3</inf><sup>-</sup>-N uptake U<inf>amb</inf>varied from 11.40 to 69.13 &mu;g&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup> with an average of 34.45 &mu;g&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>, and the ambient uptake velocity V<inf>f-amb</inf> averaged 0.24 mm&bull;s<sup>-1</sup> and varied from 0.07 to 0.43 mm&bull;s<sup>-1</sup>across three well-mixed sub-reaches in the study. The ambient uptake length S<inf>w-amb</inf> averaged 199.06 m with a range from 92.51 to 405.74 m, which was much smaller than the length of the drainage ditch (about 2.5 km), suggesting that the agricultural drainage ditch had a high potential for NO<inf>3</inf><sup>-</sup>-N retention. Generally, the M-M model fit the NO<inf>3</inf><sup>-</sup>-N uptake dynamics well, and the maximum uptake U<inf>max</inf>ranged from 158 to 1280 &mu;g&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup> with a mean of 631.13 &mu;g&bull;(m<sup>2</sup>&bull;s)<sup>-1</sup>. The half saturation constant K<inf>m</inf>ranged from 0.16 to 5.52 mg&bull;L<sup>-1</sup> with a mean of 1.46 mg&bull;L<sup>-1</sup>. According to correlation analysis, S<inf>w-amb</inf> was negatively correlated with NO<inf>3</inf><sup>-</sup>-N<inf>amb</inf>, and U<inf>amb</inf>was significantly positively correlated with NO<inf>3</inf><sup>-</sup>-N<inf>amb</inf>, while other nutrient spiraling metrics were not correlated with the NO<inf>3</inf><sup>-</sup>-N ambient concentration. Hydrological conditions had no distinct effect on the NO<inf>3</inf><sup>-</sup>-N retention, but both the width variability &Fcy;<inf>w</inf>and variability in cross-sectional area &Fcy;<inf>A</inf>were significantly correlated with most of the nutrient spiraling metrics, indicating that geomorphic features in the drainage ditch evidently impacted NO<inf>3</inf><sup>-</sup>-N uptake.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Catchments
Controlled terms:Agriculture - Bromine compounds - Correlation methods - Dynamics - Nitrates - Nutrients - Potash - Potassium Nitrate - Sodium compounds
Uncontrolled terms:Agricultural drainage - Ambient concentrations - Correlation analysis - Drainage ditches - Hydrological condition - Michaelis-Menten - Nitrate uptake - Tracer additions for spiraling curve characterization(TASCC)
Classification code:804.2  Inorganic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 922.2  Mathematical Statistics
Numerical data indexing:Mass_Density 1.46e-03kg/m3 to 2.20e-02kg/m3, Mass_Density 1.60e-04kg/m3 to 5.52e-03kg/m3, Size 1.99e+02m, Size 2.50e+03m, Size 9.25e+01m to 4.06e+02m, Velocity 2.40e-04m/s to 2.20e+01m/s
DOI:10.13227/j.hjkx.201710220

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 259>

Accession number:20184205948077
Title:Removal of Odorants in Drinking Water Using VUV/Persulfate
Authors:Sun, Xin (1); Shi, Lu-Xiao (1); Zhang, Yi (1); Yang, Li (1); Tang, Xiao (2) 
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Xi'an Jumping Water Environment Technology Co., Ltd., Xi'an; 710075, China 
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2195-2201
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to solve the odor problem of drinking water, the performance of a VUV/persulfate process and its influencing factors were investigated systematically for removing odors from 2-MIB and GSM. The results showed that it was difficult to remove 2-MIB and GSM using PS alone with a PS concentration of 0.5 mmol&bull;L<sup>-1</sup>, but the removal rates of 2-MIB and GSM by the VUV/PS process could be increased by 76% and 74%, respectively, compared with VUV alone. The performance of the VUV/PS process was mainly affected by the PS concentration and VUV intensity. When the PS concentration increased from 0.25 to 2 mmol&bull;L<sup>-1</sup> and the VUV intensity increased from 113.2 to 618.5 &mu;W&bull;cm<sup>-2</sup>, the removal rate of 2-MIB was increased by 42% and 39%, respectively, and the removal rate of GSM was increased by 34% and 16%, respectively. The effect of pH on 2-MIB and GSM removal was not significant. The occurrence of HCO<inf>3</inf><sup>-</sup> and humic acid will decrease the removal rates of 2-MIB and GSM, and the degree of reduction increases with the concentrations of HCO<inf>3</inf><sup>-</sup> ion and humic acid. The VUV/PS process can effectively degrade the typical odorants in water and can reduce the difficulty of subsequent water treatment.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:30
Main heading:Potable water
Controlled terms:Biological materials - Global system for mobile communications - Odors - Organic acids - Sulfur compounds - Water treatment
Uncontrolled terms:2-MIB - Degree of reduction - Effect of pH - Odor problems - Persulfate - Removal rate - Sulfate radicals - Ultra-violet light
Classification code:444  Water Resources - 445.1  Water Treatment Techniques - 461.2  Biological Materials and Tissue Engineering - 804.1  Organic Compounds
Numerical data indexing:Molar_Concentration 2.50e-01mol/m3 to 2.00e+00mol/m3, Molar_Concentration 5.00e-01mol/m3 to 2.20e-02mol/m3, Percentage 1.60e+01%, Percentage 3.40e+01%, Percentage 3.90e+01%, Percentage 4.20e+01%, Percentage 7.40e+01%, Percentage 7.60e+01%, Surface_Power_Density 1.13e+00W/m2 to 6.19e+00W/m2
DOI:10.13227/j.hjkx.201709019

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 260>

Accession number:20184205947831
Title:Spatial Distribution Study and Pollution Assessment of Pb in Soils in the Xijiang River Drainage of Guangxi
Authors:Zhang, Yun-Xia (1); Song, Bo (1, 2); Chen, Tong-Bin (1, 3); Fu, Feng-Yan (1); Huang, Fei (1); Pang, Rui (1); Pan, Hui-Mei (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) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China 
Corresponding author:Song, Bo(songbo@glut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:2446-2455
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To obtain data for the accumulation of Pb and its risk in soils in the Xijiang River drainage of Guangxi, 2 594 samples were collected from nonferrous metal mining soils, farmland soils (paddy soils and dryland soils), and the background soils in the drainage area. Geostatistical analysis combined with GIS was used to study the soil spatial distribution characteristics and pollution distribution of the soil Pb content. The results showed that the Pb background value of the soil was 51.84 mg&bull;kg<sup>-1</sup> in the Xijiang River Basin, and the results of the single sample T test showed that the soil background value was significantly higher than that of a previous study (22.08 mg&bull;kg<sup>-1</sup>) and the soil background value (20.50 mg&bull;kg<sup>-1</sup>) in Guangxi province. The geometric mean concentration of Pb in the mining soils, dryland soils, and paddy soils were 655.9, 116.7, and 40.63mg&bull;kg<sup>-1</sup>, respectively, significantly higher than that in other soils. Using GB 15618-1995 and the baseline as the limiting value, the corresponding exceedance rate of the mining soils, dryland soils, and paddy soils were 57.69%, 16.40%, and 8.92% and 54.95%, 8.09%, and 2.03%. The mining soils and farmland soils had an obvious lead accumulation trend. There was an obvious spatial autocorrelation of Pb in the soil, and the structural variation was dominant. The content of Pb in the upper reaches of the Xijiang River reached the middle and lower reaches of the Xijiang River, and the soil Pb was characterized by an obvious decrease. The accumulation of high Pb content in the upper reaches of Diaojiang River is much larger than that in the lower reaches of Diaojiang River. The content of Pb in soil samples in the Xijiang River Basin was mainly rated between mild pollution and moderate pollution, and the pollution was concentrated in the municipal administrative area and the mining activity area. The pollution of the soil in Jinchengjiang and Nandan counties was closely related to the frequent local mining activities.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:31
Main heading:Soil pollution
Controlled terms:Farms - Lead - River pollution - Rivers - Soil surveys - Soils - Spatial distribution - Spatial variables measurement - Watersheds
Uncontrolled terms:Background value - Distribution characteristics - Geostatistical analysis - Mining activities - Pollution assessment - River basins - Spatial autocorrelations - Structural variations
Classification code:444.1  Surface Water - 453  Water Pollution - 483.1  Soils and Soil Mechanics - 546.1  Lead and Alloys - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 921  Mathematics - 943.2  Mechanical Variables Measurements
Numerical data indexing:Percentage 1.64e+01%, Percentage 2.03e+00%, Percentage 5.50e+01%, Percentage 5.77e+01%, Percentage 8.09e+00%, Percentage 8.92e+00%
DOI:10.13227/j.hjkx.201709242

Database:Compendex
Compilation and indexing terms, Copyright 2018 Elsevier Inc.

<RECORD 261>

Accession number:20184205948054
Title:Seasonal Variation and Source Analysis of Water-soluble Inorganic Salts in PM<inf>2.5</inf> in the Southern Suburbs of Beijing
Authors:Gao, Han-Yu (1); Wei, Jing (1); Wang, Yue-Si (2) 
Author affiliation:(1) College of Resources and Environment Science, Hebei Agricultural University, Baoding; 071001, China; (2) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China 
Corresponding author:Wei, Jing(weijing_199@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:39
Issue:5
Issue date:May 15, 2018
Publication year:2018
Pages:1987-1993
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the variation of water-soluble inorganic ions in the four suburbs of Beijing using the atmospheric fine particulate matter rapid trapping system and chemical composition analysis system (RCFP-IC), we carried out measurements for nine water-soluble inorganic ions (Cl<sup>-</sup>, NO<inf>2</inf><sup>-</sup>, NO<inf>3</inf><sup>-</sup>, SO<inf>4</inf><sup>2-</sup>, Na<sup>+</sup>, NH<inf>4</inf><sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>) in PM<inf>2.5</inf> with continuous on-line observations for one year in Beijing's southern suburbs in 2016. The transport process of pollutants and the potential sources of pollutants were evaluated by combining a trajectory clustering method and potential source contribution factor analysis method (PSCF). During the observation period, the total concentration of the nine water-soluble inorganic ions was 38.6 &mu;g&bull;m<sup>-3</sup>, and results showed that the concentration in winter and spring was high and in summer and autumn was low. The order of the concentration from high to low was SO<inf>4</inf><sup>2-</sup>&gt;NO<inf>3</inf><sup>-</sup>&gt;NH<inf>4</inf><sup>+</sup>&gt;Ca<sup>2+</sup>&gt;NO<inf>2</inf><sup>-</sup>&gt;Cl<sup>-</sup>&gt;Na<sup>+</sup>&gt;K<sup>+</sup>&gt;Mg<sup>2+</sup>. In winter, the SO<inf>4</inf><sup>2-</sup>, NO<inf>3</inf><sup>-</sup> and NH<inf>4</inf><sup>+</sup> accounted for 75.7% of the total measured water-soluble ions, followed by 72.8% in spring and 60.2% in summer. With an increase in air pollution, the concentrations of SO<inf>4</inf><sup>2-</sup>, NO<inf>3</inf><sup>-</sup>, and NH<inf>4</inf><sup>+</sup> increased significantly, indicating that SO<inf>4</inf><sup>2-</sup>, NO<inf>3</inf><sup>-</sup>, and NH<inf>4</inf><sup>+</sup> were closely related to the deterioration of air quality. SO<inf>4</inf><sup>2-</sup> was dominant in the formation of secondary ions compared to NO<inf>3</inf><sup>-</sup> and NH<inf>4</inf><sup>+</sup>; and SO<inf>4</inf><sup>2-</sup>, NO<inf>3</inf><sup>-</sup>, and NH<inf>4</inf><sup>+</sup> had significant diurnal variations. The diurnal variation of the SO<inf>4</inf><sup>2-</sup> statistic (hours) was bimodal, and the peak values were at about 10:00 and 18:00. The diurnal variation of NO<inf>3</inf><sup>-</sup> and NH<inf>4</inf><sup>+</sup> had single peaks, with the peak appearing at 10:00. The trend of the diurnal variation for these two ions was similar. Finally, the sources of pollution in the southern suburbs of Beijing mainly included secondary sources, coal-fired sources, and mixed sources of dust and dust. The main potential source of pollution in the southern suburbs was in the southeastern part of the observation site, while the northeastern airflow was favorable for the diffusion and dilution of pollutants.<br/> &copy; 2018, Science Press. All right reserved.
Number of references:32
Main heading:Chemical analysis
Controlled terms:Air quality - Coal dust - Deterioration - Ions - Nitrogen oxides - Particles (particulate matter)
Uncontrolled terms:Diurnal variation - P