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<RECORD 1>

Accession number:20172603860960
Title:Day-Night Variation and Source Apportionment of Carbonaceous Aerosols in PM<inf>10</inf>During Spring and Summer of Lanzhou
Authors:Ma, Li (1, 3); Yu, Ye (1, 2); Wang, Bo (1); Zhao, Su-Ping (1); Li, Gang (4)
Author affiliation:(1) Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; (2) Pingliang Land Surface Process &amp; Severe Weather Research Station, Chinese Academy of Sciences, Pingliang; 744015, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Institute of Arid Meteorology, China Meteorological Administration, Lanzhou; 730020, China
Corresponding author:Yu, Ye(yyu@lzb.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1289-1297
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The purpose of this study was to investigate the characteristics and source apportionment of carbonaceous aerosols in PM<inf>10</inf>for the daytime and nighttime during spring and summer over Lanzhou. The samples were collected from 1 April 2015 to 30 August 2015, daytime samples were collected during 08:00 to 20:00 and nighttime samples during 20:00 to 08:00 on the next day, and organic carbon (OC) and elemental carbon (EC) concentrations were measured. The results showed that PM<inf>10</inf>, OC and EC concentrations were (136.0&plusmn;84.3), (12.4&plusmn;3.2), (2.3&plusmn;0.7) &mu;g&middot;m<sup>-3</sup>during the daytime, and (196.0&plusmn;109.2), (16.0&plusmn;5.3), (5.0&plusmn;2.1) &mu;g&middot;m<sup>-3</sup>during the nighttime. The mass concentrations of PM<inf>10</inf>, OC and EC in the nighttime were higher than those during the daytime. The ratios of secondary organic carbon to total organic carbon were higher in the daytime than nighttime, suggesting that the secondary organic carbon pollution was more serious in the daytime. In sand-dust weather, the concentrations of PM<inf>10</inf>and OC were higher than those in non-dust weather, while the EC concentration was close to that in non-dust weather. Secondary organic carbon and total carbon aerosols were higher in sand-dust weather, but the contribution to the PM<inf>10</inf>was relatively low. In addition, principal component analysis on the eight carbon fractions of non-dust weather indicated that coal combustion, vehicle exhaust and biomass burning were the major sources for carbonaceous aerosol during the daytime, while coal combustion, dust, diesel exhaust and biomass burning played important roles in the nighttime. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Organic carbon
Controlled terms:Aerosols - Carbon - Coal combustion - Coal dust - Dust - Particles (particulate matter) - Principal component analysis
Uncontrolled terms:Biomass-burning - Carbonaceous aerosol - Elemental carbon - Mass concentration - Secondary organic carbon - Source apportionment - Total Organic Carbon - Vehicle exhausts
Classification code:451.1  Air Pollution Sources - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 804  Chemical Products Generally - 804.1  Organic Compounds - 922.2  Mathematical Statistics - 951  Materials Science
DOI:10.13227/j.hjkx.201608156

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 2>

Accession number:20172603861005
Title:Forms Distribution and Ecotoxicity of Three Forms of Sulfonamides in Root-Soil Interface of Maize
Authors:Jin, Cai-Xia (1); Si, Xiao-Wei (1, 2); Wang, Wan-Feng (1); Wang, Chun-Feng (1); Wang, Zi-Ying (1); Zhang, Qin-Wen (1); Wang, Wan (2)
Author affiliation:(1) Henan Key Laboratory of Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China; (2) Judicial Authentication Center of Ecological Environmental Damage of Henan, Zhengzhou; 450011, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1683-1688
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Forms distribution and ecotoxicity of sulfonamides in root-soil interface of maize were studied by chemical analysis and luminescent bacteria toxicity assay. The results indicated that the water soluble residues were the main form in rhizosperic soils, and the organic solvent extractable residues were the main form in far-rhizosperic soils. The three forms of sulfonamides showed relatively lower toxicity to luminescent bacteria with the relative inhibition rates less than 30%. The toxicity of water soluble residues was lower than that of the organic solvent extractable residues, and the bound residues showed the lowest toxicity to luminescent bacteria. The contents and relative inhibition rates of water soluble residues in rhizosperic soils were higher than those in far-rhizosperic soils, while the contents and relative inhibition rates of organic solvent extractable and bound residues in rhizosperic soils were lower than those in far-rhizosperic soils. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Toxicity
Controlled terms:Amides - Bacteria - Chemical analysis - Forming - Luminescence - Organic solvents - Soils - Solvents - Sulfur compounds
Uncontrolled terms:Bound residues - Ecotoxicity - Inhibition rate - Luminescent bacteria - Soil interfaces - Sulfonamides - Toxicity assays - Watersoluble
Classification code:461.7  Health Care - 483.1  Soils and Soil Mechanics - 741.1  Light/Optics - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds
Numerical data indexing:Percentage 3.00e+01%
DOI:10.13227/j.hjkx.201606036

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 3>

Accession number:20172603860973
Title:Effects of Coastal Organic Pollution on Bacterioplankton Community in Sanmen Bay
Authors:Dai, Wen-Fang (1, 2); Guo, Yong-Hao (1); Yu, Wei-Na (1, 2); Xiong, Jin-Bo (1, 2)
Author affiliation:(1) School of Marine Sciences, Ningbo University, Ningbo; 315211, China; (2) Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo; 315211, China
Corresponding author:Xiong, Jin-Bo(xiongjinbo@nbu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1414-1422
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Coastal organic pollution has become a serious problem, thus it is imperative to assess the potential effects on the marine environment. The microbes are generally the first responders to environmental perturbation, which may serve as biological indicators for pollution levels. In this study, we collected surface seawater samples from Sanmen Bay and adjacent Yushan Reserve. Using an Illumina sequencing based analysis of bacterial 16S rRNA gene, we explored the effect of organic pollution on the bacterioplankton community compositions (BCCs). The results showed that the organic pollution (A) was 4.57&plusmn;2.41 at Sanmen Bay, which was significantly higher (P&lt;0.001) than that in Yushan Reserve (0.43&plusmn;0.74). The bacterial diversity and community compositions differed significantly between the two locations. Specifically, the relative abundance of Actinobacteria, &alpha;-Proteobacteria, &beta;-Proteobacteria, SAR406 in Sanmen Bay was significantly higher than that in Yushan Reserve, while Bacteroidetes, Cyanobacteria, Planctomycetes exhibited an opposite change pattern. A multivariate regression tree analysis showed that the bacterial diversity was primarily affected by water pH, organic pollution and chlorophyll a levels, which respectively explained 27.7%, 15.6% and 6.7% variance in bacterial diversity. A redundancy analysis (RDA) revealed that the bacterioplankton community was significantly controlled by pH, salinity and organic pollution, which cumulatively explained 14.8% of the variation in BCCs. In addition, the geographic distance was significantly (P&lt;0.001) correlated with BCCs, accounting for 4.42% variance, which suggested that the spatial distribution of bacterioplankton community was non-random. Moreover, this study screened 23 sensitive bacterial families, whose relative abundances were significantly associated the organic pollution. For a given bacterial family, the change pattern of relative abundance was consistent with its known function, thus holding the potential for indicating organic pollution levels. To conclude, this study showed that the increasing coastal organic pollution had altered BCCs, and enriched the relative abundances of potential pathogens. Furthermore, the sensitive bio-indicators were screened for evaluating the increasing organic pollution level. &copy; 2017, Science Press. All right reserved.
Number of references:49
Main heading:Water pollution
Controlled terms:Marine pollution - Pollution - Redundancy - Regression analysis - RNA
Uncontrolled terms:Bio-indicative bacterial family - Community composition - Driving factors - Organic pollution - Redundancy analysis
Classification code:453  Water Pollution - 461.2  Biological Materials and Tissue Engineering - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.48e+01%, Percentage 1.56e+01%, Percentage 2.77e+01%, Percentage 4.42e+00%, Percentage 6.70e+00%
DOI:10.13227/j.hjkx.201610003

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 4>

Accession number:20172603860999
Title:N<inf>2</inf>O Consumption Ability of Submerged Paddy Soil and the Regulatory Mechanism
Authors:Wang, Ling (1, 2); Xing, Xiao-Yi (1, 2); Qin, Hong-Ling (1); Liu, Yi (1); Wei, Wen-Xue (1)
Author affiliation:(1) Taoyuan Station of Agro-Ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wei, Wen-Xue(wenxuewei@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1633-1639
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A large number of researches showed that the N<inf>2</inf>O negative emissions from flooding paddy fields, peatlands and other wetlands ecosystem were frequent and considerable, which is of great significance on alleviating the greenhouse gas effect. However, there are few reports about the transformation and microbial mechanism of N<inf>2</inf>O between atmosphere and paddy soil. The slurry of surface paddy soil (0-5 cm) was incubated in laboratory conditions, and the effect of enhanced N<inf>2</inf>O concentrations in headspace on the N<inf>2</inf>O consumption capacity of submerged paddy soil and the response of nosZ gene abundance were explored. The results showed that, paddy soil under flooding and anaerobic conditions harbored very strong potential of N<inf>2</inf>O reduction along with a relatively high nosZ gene abundance (10<sup>8</sup>copies&middot;g<sup>-1</sup>dry soil at DNA level). Regression analysis presented the N<inf>2</inf>O concentrations in headspace were positively correlated (r<sup>2</sup>=1, P&lt;0.001) to the N<inf>2</inf>O consumption rates of paddy soil slurry, indicating the high N<inf>2</inf>O concentration could stimulate the N<inf>2</inf>O consumption power, to a very high rate of 4 567.99 &mu;g&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>. Meanwhile, there were no significant differences in the high abundance of nosZ gene among N<inf>2</inf>O treatments, demonstrating the nosZ gene abundance at DNA level might not be the main controller of N<inf>2</inf>O consumption ability in submerged paddy soil and further study on the key microbial factor is needed. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Underwater soils
Controlled terms:Floods - Gas emissions - Genes - Greenhouse effect - Greenhouse gases - Regression analysis - Soils - Wetlands
Uncontrolled terms:Anaerobic conditions - Consumption rates - Laboratory conditions - N2O reduction - NosZ - Paddy fields - Paddy soils - Regulatory mechanism
Classification code:451  Air Pollution - 451.1  Air Pollution Sources - 461.2  Biological Materials and Tissue Engineering - 483.1  Soils and Soil Mechanics - 922.2  Mathematical Statistics
Numerical data indexing:Size 0.00e+00m to 5.00e-02m
DOI:10.13227/j.hjkx.201609138

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 5>

Accession number:20172603860971
Title:Vertical Stratification Characteristics of Dissolved Oxygen and Phytoplankton in Thousand-Island Lake and Their Influencing Factors
Authors:Yu, Yan (1); Liu, De-Fu (2, 3); Yang, Zheng-Jian (2, 3); Zhang, Jia-Lei (2, 3); Xu, Ya-Qian (2); Liu, Jin-Gao (2); Yan, Guang-Han (1)
Author affiliation:(1) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) College of Civil and Environmental Engineering, Hubei University of Technology, Wuhan; 430068, China; (3) Key Laboratory of Ecological Remediation of Lakes and Rivers and Algal Utilization of Hubei Province, Wuhan; 430068, China
Corresponding author:Yang, Zheng-Jian(656637841@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1393-1402
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:According to the data collected from the five monitoring sites in front of the dam in Thousand-island Lake in September 2015, the vertical distribution characteristics of dissolved oxygen (DO), water temperature, pH, turbidity, conductivity and phytoplankton were analyzed. The influencing factors of special stratification of DO and vertical distribution of phytoplankton were also discussed. The results showed that: (1) The vertical distribution of DO presented &ldquo;the surface is higher than the underlying&rdquo; mode. DO ranged from 1.95 mg&middot;L<sup>-1</sup>to 8.25 mg&middot;L<sup>-1</sup>and the average concentration was 5.10 mg&middot;L<sup>-1</sup>. Low-oxygen zones appeared between 12 m and 20 m and the minimum concentration was 1.95 mg&middot;L<sup>-1</sup>at 17 m. The concentration of DO maintained at a high level between 0 m and 12 m and the vertical variance was small. Sudden drop of DO occurred between 12 m and 20 m and there was an anoxic zone (&lt;4.0 mg&middot;L<sup>-1</sup>). The concentration of DO returned to normal level between 20 m and 38 m. Then it reduced under 38m as the water depth increased. The vertical distribution of pH showed the same trend with that of DO and their sudden change regions appeared in the same zone. (2) Vertical phytoplankton biomass displayed significant difference. The phytoplankton biomass of S1, S2 and S3 presented: mid-layer&gt;surface&gt;bottom. But S4, S5 presented: bottom&gt;surface&gt;mid-layer. In addition, the depth between 20 m and 30 m was the best for the growth of phytoplankton. (3) The correlation analysis showed that DO and water temperature in the thermocline were significantly correlative. The range and degree of low-oxygen zones in Thousand-island Lake was determined by physical processes like thermal stratification of water and direct or indirect effects of the plankton. Phytoplankton and DO, pH showed significant negative correlation. The phytoplankton was mainly influenced by turbulent mixing and DO stratification in the surface layer while it was mainly influenced by light intensity at the bottom. &copy; 2017, Science Press. All right reserved.
Number of references:51
Main heading:Dissolved oxygen
Controlled terms:Biochemical oxygen demand - Dissolution - Lakes - Oxygen - Phytoplankton - Temperature
Uncontrolled terms:Average concentration - Chemical factors - Correlation analysis - Negative correlation - Phytoplankton biomass - Vertical distributions - Vertical stratification - Water temperatures
Classification code:471  Marine Science and Oceanography - 641.1  Thermodynamics - 802.3  Chemical Operations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 1.95e-03kg/m3, Mass_Density 1.95e-03kg/m3 to 8.25e-03kg/m3, Mass_Density 5.10e-03kg/m3, Size 0.00e+00m to 1.20e+01m, Size 1.20e+01m to 2.00e+01m, Size 1.70e+01m, Size 2.00e+01m to 3.00e+01m, Size 2.00e+01m to 3.80e+01m, Size 3.80e+01m
DOI:10.13227/j.hjkx.201606085

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 6>

Accession number:20172603860968
Title:Hanfeng Pre-reservoir Commissioning Time Variation Feature of the Hydrology and Water Quality in Three Gorges Reservoir
Authors:Yang, Bing (1); He, Bing-Hui (1); Wang, De-Bao (1)
Author affiliation:(1) Key Laboratory of Eco-environments in the Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China
Corresponding author:He, Bing-Hui(hebinghui@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1366-1375
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Hanfeng Pre-reservoir is very rare in the world which is specially designed to reduce the impact of Fluctuating Zone, and it is formed in Hanfeng Lake of Three Gorges reservoir. The Hanfeng Pre-reservoir has many special hydrological characteristics and ecological environment features based on its unique &ldquo;pre-reservoir&rdquo; control mode, the wide seasonal wetland of Fluctuating Zone, the huge life pollution and agricultural pollution, and the pressure of huge city and excessive population. HanFeng Lake has a variety of morphological features such as lakes, rivers, and other backwater bay, for the effect of water level regulation in Three Gorges, since the successful commissioning of the Hanfeng Lake pre-dam system in 2015. The change of Hanfeng Lake hydrology and water quality during the commissioning was divided into four periods by combining Hydrological and Morphological Variation characteristics with Water quality indicators time clustering analysis: May to August as T1 (river period); January, March and November to December as T2 (lake period); February, April and September as T3 (water level fluctuation period); October as T4 (algal blooms period) in 2015. Principal component analysis and stepwise regression analysis showed that Eutrophication of Hanfeng Lake was dominated by different dominant components at different times and the water quality index factor which has a significant effect on the Chl-a was also different. Cumulative contribution rates of principal components were 82.93%, 77.61%, 78.32%, 88.40% for each period, respectively. The main water quality indicators of T1 (river period) were DP, TP, SD, pH and the significant influencing index of Chl-a was PC<inf>2</inf>, so Chl-a was mainly affected by water nitrogen content. The main water quality indicators of T2 (lake period) were TN, DN, DP, TP, NO<inf>3</inf><sup>-</sup>-N and the significant influencing index of Chl-a was PC<inf>1</inf>, so Chl-a was mainly affected by water eutrophication including nitrogen and phosphorus nutrient status. The main water quality indicators of T3 (water level fluctuation period) were SD, NH<inf>4</inf><sup>+</sup>-N, DN, T and the significant influencing index of Chl-a was PC<inf>3</inf>. so Chl-a was mainly affected by water level fluctuation. The main water quality indicators of T4 (algal blooms period) were TN, DN, DO, NH<inf>4</inf><sup>+</sup>-N, pH, permanganate index, H, NO<inf>3</inf><sup>-</sup>-N and the significant influencing index of Chl-a was PC<inf>3</inf>. so Chl-a was mainly affected by flow rate and hydrodynamic conditions. As mentioned in the review, the frequent and significant water level changes during the commissioning of Hanfeng Lake were the important factors influencing the change of hydrological and water quality characteristics. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Reservoirs (water)
Controlled terms:Eutrophication - Hydrology - Lake pollution - Lakes - Multivariant analysis - Nitrogen - Pollution - Pollution control - Principal component analysis - Quality control  - Regression analysis - River pollution - Rivers - Water levels - Water quality - Water resources
Uncontrolled terms:Commissioning - Hydrological characteristics - Multivariate statistical analysis - Nitrogen and phosphorus - Stepwise regression analysis - Variation characteristics - Water quality characteristics - Water quality indicators
Classification code:441.2  Reservoirs - 444  Water Resources - 445.2  Water Analysis - 453  Water Pollution - 804  Chemical Products Generally - 913.3  Quality Assurance and Control - 922  Statistical Methods - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 7.76e+01%, Percentage 7.83e+01%, Percentage 8.29e+01%, Percentage 8.84e+01%
DOI:10.13227/j.hjkx.201607173

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 7>

Accession number:20172603860994
Title:Pollution Characteristics and Source Analysis of Polycyclic Aromatic Hydrocarbons in Agricultural Soils from Shandong
Authors:Ge, Wei (1); Cheng, Qi-Qi (2); Chai, Chao (2); Zeng, Lu-Sheng (2); Wu, Juan (2); Chen, Qing-Hua (2); Zhu, Xiang-Wei (2); Ma, Dong (2)
Author affiliation:(1) College of Life Science, Qingdao Agricultural University, Qingdao; 266109, China; (2) College of Resources and Environment, Qingdao Agricultural University, Qingdao; 266109, China
Corresponding author:Chai, Chao(chaichao1999@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1587-1596
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants that originate mainly from anthropogenic sources. PAHs have elicited much concern because they exhibit strong toxic, carcinogenic, and mutagenic properties. Agricultural soil is at risk of PAH contamination mainly caused by atmospheric depositions, wastewater irrigation, or organic substances and biowaste applied as fertilizers. The surface agricultural soils were collected from Shandong in July 2015, and measured for 16 US EPA priority PAHs using high performance liquid chromatography with UV and fluorescence detector. The content and composition of PAHs were analyzed. The differences of PAHs between soils from the field for growing crops and from vegetable greenhouses, and between soils from point sources and from non-point sources were compared. The sources of PAHs were determined with methods of ratio between PAHs and positive matrix factorization (PMF), and the risks of PAHs were assessed. The results showed that the total content of 16 PAHs (&sum;16PAHs) ranged from 111.5 ng&middot;g<sup>-1</sup>to 2 744.1 ng&middot;g<sup>-1</sup>, with the mean of 556.3 ng&middot;g<sup>-1</sup>. The content of 3-ring PAHs was relatively high, with the mean of 201.5 ng&middot;g<sup>-1</sup>; while the contents of 2-ring and 6-ring PAHs were relatively low, with the mean of 39.3 ng&middot;g<sup>-1</sup>and 43.4 ng&middot;g<sup>-1</sup>, respectively. According to the contamination classification in Poland, 71% of the samples in Shangdong were weakly contaminated. Compared with other areas in China, the content of PAHs in the agricultural soils in Shandong was in the middle range. Acenaphthene, fluorine, and fluoranthene were the major PAH compounds, accounting for more than 10% of the total PAHs; while the contribution of indeno (1,2,3-cd) pyrene was low. The content of &sum;16PAHs and contribution of 7 carcinogenic PAHs were significantly higher in soils polluted by point sources than those in soils from non-point sources. Moreover, the contribution of PAHs with 2-3 rings was significantly higher in soils from non-point sources, while the contribution of PAHs with 4-6 rings was significantly higher in soils polluted by point sources. There was no significant difference in soils from vegetable greenhouses and from adjacent field soils, and the contribution of PAHs with 3-4 rings was high. The PAH isomer pair ratios of Ant/(Ant+Phe), Flu/(Flu+Pyr), BaA/(BaA+Chr), and InP/(InP+BP) were utilized as molecular indices to elucidate the possible PAH sources, and the results suggested that the PAHs in the soils were mainly from combustion. To quantitatively assess the contribution of various sources to PAH contamination, PMF was used to analyze the sources. The sources of PAHs were combustion of coal biomass, oil combustion from traffic, coking, and petroleum pollution, with contribution of 42.7%, 19.3%, 22.8% and 15.2%, respectively. Toxic equivalency factors were used to evaluate PAH contamination in the soils, and the carcinogenicity of other PAHs relative to BaP was quantified to estimate the BaP-equivalent concentration (TEQ<inf>BaP</inf>). The TEQ<inf>BaP</inf>of 16 PAHs (&sum;16TEQ<inf>Bap</inf>) in soils from non-point sources and vegetable greenhouses was 31.69 and 44.47 ng&middot;g<sup>-1</sup>, respectively, which were below the safe value in Canadian soil quality guidelines. However, the &sum;16TEQ<inf>Bap</inf>in some field soils from point sources exceeded the safe value, indicating that there were potential risks in the soils from point sources in Shandong. &copy; 2017, Science Press. All right reserved.
Number of references:46
Main heading:Soil pollution
Controlled terms:Agriculture - Aromatic compounds - Aromatic hydrocarbons - Aromatization - Coal combustion - Coking - Combustion - Contamination - Environmental Protection Agency - Factorization  - Fluorescence - Greenhouses - High performance liquid chromatography - Hydrocarbons - Liquid chromatography - Meteorological problems - Pollution - Polycyclic aromatic hydrocarbons - Risk assessment - Risks  - Soils - Vegetables
Uncontrolled terms:Atmospheric depositions - Environmental contaminant - Equivalent concentrations - Polycyclic aromatic hydrocarbons (PAHS) - Positive Matrix Factorization - Shandong - Source analysis - Toxic equivalency factors
Classification code:443.1  Atmospheric Properties - 454.2  Environmental Impact and Protection - 483.1  Soils and Soil Mechanics - 524  Solid Fuels - 741.1  Light/Optics - 802.2  Chemical Reactions - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1  Accidents and Accident Prevention - 921  Mathematics
Numerical data indexing:Percentage 1.00e+01%, Percentage 1.52e+01%, Percentage 1.93e+01%, Percentage 2.28e+01%, Percentage 4.27e+01%, Percentage 7.10e+01%
DOI:10.13227/j.hjkx.201608199

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 8>

Accession number:20172703864524
Title:Tempo-spatial Variations and Influential Factors of Carbon Dioxide Emissions from the Geheyan Reservoir over the Qingjiang River Basin, China
Authors:Zhao, Deng-Zhong (1); Tan, De-Bao (1); Li, Chong (2); Shen, Shao-Hong (1)
Author affiliation:(1) Changjiang River Scientific Research Institute (CRSRI), Changjiang Water Resources Commission, Wuhan; 430010, China; (2) China Three Gorges Corporation, Beijing; 100038, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:954-963
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Greenhouse gas emission from aquatic ecosystem will affect climate change on the regional and global scale. So large river interception project which affects the carbon cycle model and greenhouse gas emission from aquatic ecosystem has provoked more and more attentions in recent years. In order to understand and evaluate the effects of typical hydropower project construction on the aquatic ecosystem and carbon cycle, the Geheyan Reservoir, a typical river interception project, was selected as a typical case in this paper for measuring carbon dioxide fluxes from interface between water and atmosphere from March, 2015 to February, 2016. The integration of the online gas analyzer and floating box was used to obtain carbon dioxide fluxes from interface between water and atmosphere. Data was obtained over the before dam, upstream, tributary, drawdown area and bay area respectively for understanding the spatial Heterogeneity of carbon dioxide fluxes. Data analysis showed that yearly mean fluxes of carbon dioxide from the Geheyan Reservoir was (55.6918&plusmn;66.3329) mg&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>during measurement, which indicated that the temporal distribution was higher in winter and lower in other seasons and the spatial variation was higher in typical bay and lower before dam as well as drawdown zone over the reservoir. Moreover, the seasonal variation of carbon dioxide fluxes from the interface between water and atmosphere was very stable at Yuxiakou measurement points as a typical background area of the reservoir, which was unexpectedly higher than those before dam and drawdown zone in the most months during measurement. The results from data analysis also indicated that the spatial and temporal variation of carbon dioxide fluxes from the Geheyan Reservoir was affected by water quality parameters such as dissolved oxygen, chlorophyll, pH, water temperature and conductivity and carbon in water, but the relationship between carbon dioxide fluxes and other parameter was very different within each season and impound period. So the results above will provide more supports for understanding the import pathway and transfer of aquatic carbon cycle caused by large river interception project in China. &copy; 2017, Science Press. All right reserved.
Number of references:36
Main heading:Phase interfaces
Controlled terms:Aquatic ecosystems - Biochemical oxygen demand - Carbon dioxide - Climate change - Data handling - Dissolved oxygen - Ecology - Ecosystems - Gas emissions - Global warming  - Greenhouse gases - Information analysis - Quality control - Reservoirs (water) - Rivers - Water levels - Water quality - Watersheds
Uncontrolled terms:Carbon cycles - Carbon dioxide emissions - Carbon dioxide flux - Qingjiang river basins - Spatial and temporal distribution - Spatial and temporal variation - Temporal distribution - Water quality parameters
Classification code:441.2  Reservoirs - 443.1  Atmospheric Properties - 444.1  Surface Water - 445.2  Water Analysis - 451.1  Air Pollution Sources - 454.3  Ecology and Ecosystems - 723.2  Data Processing and Image Processing - 801.4  Physical Chemistry - 804.2  Inorganic Compounds - 903.1  Information Sources and Analysis - 913.3  Quality Assurance and Control
DOI:10.13227/j.hjkx.201607086

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 9>

Accession number:20172703864516
Title:Online Source Analysis of Particulate Matter (PM<inf>2.5</inf>) in a Heavy Pollution Process of Shijiazhuang City During Heating Period in 2015
Authors:Lu, Na (1); Li, Zhi-Guo (1); Zhou, Jing-Bo (1); Zhao, Xin (1); Yang, Li-Li (1); Feng, Yuan (1); Jin, Wei (1)
Author affiliation:(1) Shijiazhuang Environmental Monitoring Center, Shijiazhuang; 050022, China
Corresponding author:Jin, Wei(jiwei65815@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:884-893
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In recent years, more and more public attention has been paid to the problem of air pollution during the heating period in North China. This article took a heavy pollution process of Shijiazhuang district from Nov. 24th to Dec. 4th in 2015 as an example, and analyzed comprehensively the source apportionment in different periods, size distribution of the PM<inf>2.5</inf>from each source in different periods, the characteristics of mass spectra of the main emission sources and the meteorological conditions with the method of real-time online source analysis. It turned out: the main sources of pollutants were coal combustions, industrial discharges, vehicle exhausts and secondary inorganic reactions. With the help of meteorological condition of low pressure and low wind speed, the PM<inf>2.5</inf>mainly produced by coal combustions and industrial discharges accumulated heavily and went through the second stage conversion, leading to this heavy air pollution. The main particulate matters from coal combustions were the mixed carbons; the main particulate matters from industrial discharges were metals; the main particulate matters from vehicle exhausts were elemental carbon and manganese metal; the main particulate matters from pure secondary inorganic sources were secondary inorganic ions; the main particulate matters from dust pollution were aluminum, calcium, iron and silicate minerals; the main particulate matters from biomass fuel combustions were levoglucosan; the feature signal from restaurant discharges was organic acid. Different from the distribution before and after the heavy pollution period, the particulate matters from the 8 pollution sources presented even distribution during the heavy pollution period. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Air pollution
Controlled terms:Carbon - Coal - Coal combustion - Coal dust - Fuels - Mass spectrometers - Mass spectrometry - Metal analysis - Organic minerals - Pollution  - Silicate minerals - Silicates - Size distribution
Uncontrolled terms:Industrial discharges - Inorganic reactions - Mass spectra - Meteorological condition - Online sources - Particulate Matter - Shijiazhuang City - Source apportionment
Classification code:451  Air Pollution - 482.2  Minerals - 524  Solid Fuels - 801  Chemistry - 804  Chemical Products Generally - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201605058

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 10>

Accession number:20172703864529
Title:Speciation and Ecological Risk of Heavy Metals in Surface Sediments from Jiulong River
Authors:Lin, Cheng-Qi (1); Hu, Gong-Ren (1, 2); Yu, Rui-Lian (1); Han, Lu (1)
Author affiliation:(1) College of Chemical Engineering, Huaqiao University, Xiamen; 361021, China; (2) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China
Corresponding author:Yu, Rui-Lian(ruiliany@hqu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1002-1009
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Speciation characteristics of fifteen heavy metals in seventeen surface sediments from Jiulong River was analyzed using the modified BCR protocol and dilute HNO<inf>3</inf>method, respectively. The results of the modified BCR protocol showed that most of the elements (Fe, Ni, V, Tl, Ba, Sb, Ga, Cr and Sr) existed mainly in residual fractions, and extractable fraction was dominant for Mn (83.8%), followed by Cd, Pb, Zn, Co and Cu (80.0%, 75.5%, 74.3%, 70.8% and 57.7%). The results of dilute HNO<inf>3</inf>method showed that the proportions of the dilute HNO<inf>3</inf>-extractable fractions of Pb, Mn, Cd, Co, Zn and Cu were higher (70.4%, 65.4%, 58.7%, 48.4%, 44.5% and 45.5%). The assessment results of RSP (ratio of secondary phase to primary phase) indicated that Pb, Mn, Cd, Co, Zn and Cu in surface sediments of Jiulong River had higher ecological risks. Both extraction methods had merits and demerits respectively. In general, the dilute HNO<inf>3</inf>method is enough to analyze the bioavailability and ecological risk of heavy metals in sediments. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:River pollution
Controlled terms:Biochemistry - Ecology - Heavy metals - Lead - Manganese - Risk assessment - Rivers - Sediments - Strontium - Surficial sediments  - Zinc
Uncontrolled terms:Bioavailability - Dilute HNO<inf>3</inf>method - Ecological risks - Extraction method - Jiulong River - Residual fraction - Secondary phase - Surface sediments
Classification code:453  Water Pollution - 454.3  Ecology and Ecosystems - 483  Soil Mechanics and Foundations - 531  Metallurgy and Metallography - 543.2  Manganese and Alloys - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 549.2  Alkaline Earth Metals - 801.2  Biochemistry - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 4.45e+01%, Percentage 4.55e+01%, Percentage 4.84e+01%, Percentage 5.77e+01%, Percentage 5.87e+01%, Percentage 6.54e+01%, Percentage 7.04e+01%, Percentage 7.08e+01%, Percentage 7.43e+01%, Percentage 7.55e+01%, Percentage 8.00e+01%, Percentage 8.38e+01%
DOI:10.13227/j.hjkx.201607087

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 11>

Accession number:20171003409530
Title:Characteristics of methane emission from urban traffic in Nanjing
Authors:Zhang, Xue (1, 2); Hu, Ning (1, 2); Liu, Shou-Dong (1, 2); Wang, Shu-Min (1, 2); Gao, Yun-Qiu (1, 2); Zhao, Jia-Yu (1, 2); Zhang, Zhen (1, 2); Hu, Yong-Bo (1, 2); Lee, Xu-Hui (1, 2); Zhang, Guo-Jun (1, 2)
Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China; (2) Collaborative Innovation of Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China
Corresponding author:Liu, Shou-Dong(lsd@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:469-475
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Urban traffic is an important source of greenhouse gases such as CH<inf>4</inf>. The observations on CH<inf>4</inf>are the basis for quantitative analysis of urban carbon emissions. Taken into consideration the weekly and daily changing characteristics of urban traffic, we conducted experiments to analyze the features of traffic CH<inf>4</inf>emission and its influential factors. The experiments were conducted on 3 main roads in Nanjing on Oct. 17, 18, 20, 23, 2014 with 5 periods of observation per day, and in Nanjing Yangtze River tunnel in the morning and at night of Sep.11 2014. The results showed that: (1)The average concentration of CH<inf>4</inf>on the urban main road of Nanjing city was greater than that of the background atmosphere. Affected by traffic conditions, the spatial difference of &Delta;CH<inf>4</inf>concentration was significant on three typical main roads. &Delta;CH<inf>4</inf>concentration's diurnal variation showed inverted &ldquo;W&rdquo; type, and its peak appeared in the morning and evening rush hours. (2) Due to the &ldquo;piston wind&rdquo; in the tunnel, the CH<inf>4</inf>concentration in Nanjing Yangtze River tunnel gradually increased from the inlet to the outlet and the difference of concentration between the inlet and the outlet was 0.21&times;10<sup>-6</sup>-0.38&times;10<sup>-6</sup>. (3)There was a good linear correlation between CH<inf>4</inf>concentration and CO<inf>2</inf>concentration. The atmospheric &Delta;CH<inf>4</inf>&#8758;&Delta;CO<inf>2</inf>value of urban main road in Nanjing was 0.009 1 and the atmospheric &Delta;CH<inf>4</inf>&#8758;&Delta;CO<inf>2</inf>value of Nanjing Yangtze River Tunnel was 0.000 47-0.001 4. (4)Traffic volume and the proportion of natural gas vehicles were the main factors influencing atmospheric &Delta;CH<inf>4</inf>concentration and &Delta;CH<inf>4</inf>&#8758;&Delta;CO<inf>2</inf>. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Transportation
Controlled terms:Carbon - Carbon dioxide - Greenhouse gases - Natural gas - Natural gas vehicles - Rivers - Roads and streets - Tunnels
Uncontrolled terms:Average concentration - Diurnal variation - Influential factors - Linear correlation - Main roads - Spatial differences - Traffic conditions - Urban traffic
Classification code:401.2  Tunnels and Tunneling - 406.2  Roads and Streets - 432  Highway Transportation - 451.1  Air Pollution Sources - 522  Gas Fuels - 804  Chemical Products Generally - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201606090

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 12>

Accession number:20171003409558
Title:Concentration, sources and ecological risks of PAHs of different land use types in Shenfu New City
Authors:Wang, Jing (1, 2); Liu, Ming-Li (1, 2); Zhang, Shi-Chao (1, 2); Lu, Yin-Tao (1, 2); Yao, Hong (1, 2)
Author affiliation:(1) School of Civil Engineering, Beijing Jiaotong University, Beijing; 100044, China; (2) Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing; 100044, China
Corresponding author:Yao, Hong(yaohongts@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:703-710
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The concentration level of polycyclic aromatic hydrocarbon (PAHs) in topsoil from Shenfu New City in urbanization was studied. 54 topsoil samples were collected from Shenfu New City and 4 different land uses (urban land, rural land, forest land, cultivated land) were included. The concentration of PAHs in different land uses was analyzed, the sources of soil PAHs were analyzed by using diagnostic ratios and principal component analysis, and the ecological risks were calculated using toxic equivalency concentrations of BaP and the incremental lifetime cancer risk(ILCR)model. Results indicated that the concentrations of &sum;PAHs in urban land, cultivated land, rural land and forest land were in the range of 184-18 276, 230-14 102, 151-3 205, 303-2 980 &mu;g&middot;kg<sup>-1</sup>, respectively. Four land uses had similar sources, the main sources were coal combustion and traffic emission. According to the calculation of ecological risks, there were potential health risks for residents in Shenfu New City, especially urban land, meanwhile, residents were easily exposed to soil PAHs through dermal contact. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Polycyclic aromatic hydrocarbons
Controlled terms:Aromatic compounds - Aromatic hydrocarbons - Coal combustion - Ecology - Elementary particle sources - Forestry - Health risks - Hydrocarbons - Land use - Principal component analysis  - Risk assessment - Soils
Uncontrolled terms:Concentration levels - Diagnostic ratios - Different land use types - Ecological risks - Polycyclic aromatic hydrocarbons (PAHS) - Potential health risks - Toxic equivalency - Traffic emissions
Classification code:403  Urban and Regional Planning and Development - 454.3  Ecology and Ecosystems - 461.7  Health Care - 483.1  Soils and Soil Mechanics - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201607096

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 13>

Accession number:20171003409555
Title:Effects of free ammonia regulation on the performance of high solid anaerobic digesters with dewatered sludge
Authors:Dai, Xiao-Hu (1); He, Jin (1); Yan, Han (1); Li, Ning (1); Ding, Yue-Ling (1); Dong, Bin (1); Dai, Ling-Ling (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:Li, Ning(lining@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:679-687
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:High free ammonia nitrogen (FAN) is regarded as a main factor that inhibits biogas production in high solid anaerobic digestion systems with dewatered sludge. Two mesophilic semi-continuous anaerobic digesters fed with dewatered sludge (input total solids=15%) were operated and their performance under different FAN concentrations by two regulation methods including pH reduction and total ammonia nitrogen (TAN) promotion were investigated. Results showed that when FAN was elevated from (400&plusmn;174) mg&middot;L<sup>-1</sup>to (526&plusmn;25) mg&middot;L<sup>-1</sup>with the increase of TAN, the daily biogas yield declined from (11.9&plusmn;0.3) L&middot;d<sup>-1</sup>to (10.3&plusmn;0.2) L&middot;d<sup>-1</sup>. Meanwhile, volatile solids (VS) reduction rate decreased by 33.7%. When FAN dropped from (330&plusmn;99) mg&middot;L<sup>-1</sup>to (47&plusmn;13) mg&middot;L<sup>-1</sup>due to pH reduction, daily biogas yield declined from (14.4&plusmn;1.1) L&middot;d<sup>-1</sup>to (10.8&plusmn;0.3) L&middot;d<sup>-1</sup>and VS reduction rate decreased by 26.9%. The system performance was not enhanced with the reduction of FAN. With the stop of pH regulation, FAN gradually raised again to 300 mg&middot;L<sup>-1</sup>and digester performance recovered to the same as the situation before regulation. The result suggested that inhibition occurred during pH reduction. By 16S rRNA pyrosequencing analysis on bacterial and archaeal diversity and quantitative PCR analysis aiming at methanogens, it was found that bacterial community structure both changed obviously with obvious performance decline in the two digesters. Excessive FAN (&gt;500 mg&middot;L<sup>-1</sup>) could change the main bacteria species which degrade protein from Tepidimicrobium and Proteiniborus to Anaerobranca. On the other hand, some carbohydrate and protein degrading bacteria were also inhibited by pH reduction for FAN control, leading to the decline of hydrolysis rates of organic matters. As a result, the shortage of substrate supply for the methanogens weakened the biogas production of the digestion system. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Anaerobic digestion
Controlled terms:Ammonia - Bacteria - Biodegradation - Biogas - Dewatering - Digestive system - Methanogens - Nitrogen - Polymerase chain reaction - Proteins  - Pulp digesters - RNA - Sludge digestion - Substrates
Uncontrolled terms:Ammonia inhibition - Anaerobic digester - Bacterial community structure - Biogas production - Degrading bacteria - Free ammonia - High-solids - Total ammonia nitrogens
Classification code:452.2  Sewage Treatment - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 522  Gas Fuels - 801.2  Biochemistry - 802.3  Chemical Operations - 804  Chemical Products Generally - 811.1.2  Papermaking Equipment
Numerical data indexing:Mass_Density 3.00e-01kg/m3, Percentage 2.69e+01%, Percentage 3.37e+01%
DOI:10.13227/j.hjkx.201607137

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 14>

Accession number:20171003409569
Title:Isolation and identification of a chlorobenzene-degrading bacterium and its degradation characteristics
Authors:Ye, Jie-Xu (1); Lin, Tong-Hui (1); Luo, Yu-Hao (1); Chen, Dong-Zhi (1); Chen, Jian-Meng (1)
Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310032, China
Corresponding author:Chen, Jian-Meng(jchen@zjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:802-808
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A bacterium strain LW26 which could utilize chlorobenzene (CB) as sole carbon and energy source was isolated from a biotrickling filter reactor treating CB-contaminated off-gas. Based on its morphological and physiological characteristics, as well as the analysis of 16S rRNA gene sequence and Biolog test, the strain LW26 was identified as Delftia tsuruhatensis. To our best knowledge, it is the first time that the strain Delftia tsuruhatensis was applied for CB purification. In this study, the effects of temperature, pH, initial CB concentration and Cl<sup>-</sup>concentration on the biodegradation were investigated. The results showed that the optimal temperature and pH for CB biodegradation were 25&#8451; and 7.0, respectively; the maximum CB tolerated concentration for LW26 was as high as 500 mg&middot;L<sup>-1</sup>; when the concentration of Cl<sup>-</sup>was above 0.14 mol&middot;L<sup>-1</sup>, the CB degradation was significantly restrained. The degrading process of the strain LW26 followed the Haldane kinetic model and the maximum specific growth rate and the maximum specific degradation rate were 0.42 h<sup>-1</sup>and 2.53 h<sup>-1</sup>, respectively.GC-MS analysis of the metabolites revealed that CB was firstly converted to o-chlorophenol by strain LW26. Combined with the activity of catechol dioxygenase, it can be speculated that CB was finally mineralized to CO<inf>2</inf>, or converted to cell biomass after processes of ortho cleavage, dechlorination and oxidation. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Biodegradation
Controlled terms:Bacteria - Biofilters - Carbon - Carbon dioxide - Dechlorination - Degradation - Enzyme kinetics - Metabolites - Phenols - RNA  - Temperature
Uncontrolled terms:Chlorobenzene - Dechlorination and oxidations - Degradation characteristics - Delftia tsuruhatensis - Effects of temperature - Isolation and identification - Maximum specific growth rates - Physiological characteristics
Classification code:461.2  Biological Materials and Tissue Engineering - 461.8  Biotechnology - 641.1  Thermodynamics - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Molar_Concentration 1.40e+02mol/m3
DOI:10.13227/j.hjkx.201607198

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 15>

Accession number:20171003409537
Title:Temporal and spatial variations of dissolved inorganic carbon and its stable isotopic composition in the surface stream of karst groundwater recharge
Authors:Li, Li (1, 2); Pu, Jun-Bing (1); Li, Jian-Hong (1); Zhang, Tao (1, 2)
Author affiliation:(1) Key Laboratory of Karst Dynamics, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) School of Geographical Sciences, Southwest University, Chongqing; 400715, China
Corresponding author:Li, Jian-Hong(jianhongli1988@karst.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:527-534
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Stable carbon isotope of dissolved inorganic carbon (&delta;<sup>13</sup>C<inf>DIC</inf>), which is mainly constituted by HCO<inf>3</inf><sup>-</sup>in karst water, is widely used to trace the different sources and influential factors of dissolved inorganic carbon (DIC). In order to understand the distribution of DIC and &delta;<sup>13</sup>C<inf>DIC</inf>in subtropical karst area, this paper researched the water chemistry and &delta;<sup>13</sup>C<inf>DIC</inf>in a karst surface stream in detail, which is fed by Guancun subterranean stream in Liuzhou City, Guangxi Province, in the southwest of China. The results showed that the contents of DIC in subterranean stream outlet (G1 site) ranged from 4.60 to 4.90 mmol&middot;L<sup>-1</sup>with an average of 4.73 mmol&middot;L<sup>-1</sup>in dry season, and from 2.80 to 4.70 mmol&middot;L<sup>-1</sup>with an average of 4.23 mmol&middot;L<sup>-1</sup>in rainy season. The contents of DIC in 1.35 km downstream site (G2 site) ranged from 4.30 to 4.90 mmol&middot;L<sup>-1</sup>with an average of 4.56 mmol&middot;L<sup>-1</sup>in dry season, and from 3.00 to 4.70 mmol&middot;L<sup>-1</sup>with an average of 4.20 mmol&middot;L<sup>-1</sup>in rainy season. The &delta;<sup>13</sup>C<inf>DIC</inf>of subterranean stream outlet (G1 site) varied from -12.8&permil; to -11.53&permil; with an average of -12.22&permil; in dry season, and from -13.12&permil; to -11.01&permil; with an average of -12.28&permil; in rainy season. The &delta;<sup>13</sup>C<inf>DIC</inf>of stream downstream site (G2 site) ranged from -11.71&permil; to -9.55&permil; with an average of -10.73&permil; in dry season, and ranged from -12.18&permil; to -9.85&permil; with an average of -11.10&permil; in rainy season. The contents of DIC of G1 site were higher than those of G2 site. The DIC contents in dry season in both G1 and G2 site were higher than those in rainy season. The values of &delta;<sup>13</sup>C<inf>DIC</inf>of G1 and G2 site in dry season were more positive than those in rainy season. The &delta;<sup>13</sup>C<inf>DIC</inf>value of G1 site was more negative than that of G2 site. The main sources of DIC in underground river and surface stream were soil CO<inf>2</inf>and carbonate dissolution. However, the differences of DIC and &delta;<sup>13</sup>C<inf>DIC</inf>between G1 and G2 site showed that CO<inf>2</inf>degassing and photosynthesis of aquatic plants had significant influence on water DIC and &delta;<sup>13</sup>C<inf>DIC</inf>value. This study is helpful to understand the dynamic change and distribution of DIC and &delta;<sup>13</sup>C<inf>DIC</inf>in karst surface stream. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Rivers
Controlled terms:Carbon - Carbon dioxide - Dissolution - Drought - Groundwater - Isotopes - Landforms
Uncontrolled terms:Dissolved inorganic carbon - Guangxi - Influential factors - Karst surface - Stable carbon isotopes - Stable isotopic compositions - Temporal and spatial variation - Underground rivers
Classification code:444  Water Resources - 444.2  Groundwater - 481.1  Geology - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Molar_Concentration 2.80e+00mol/m3 to 4.70e+00mol/m3, Molar_Concentration 3.00e+00mol/m3 to 4.70e+00mol/m3, Molar_Concentration 4.20e+00mol/m3, Molar_Concentration 4.23e+00mol/m3, Molar_Concentration 4.30e+00mol/m3 to 4.90e+00mol/m3, Molar_Concentration 4.56e+00mol/m3, Molar_Concentration 4.60e+00mol/m3 to 4.90e+00mol/m3, Molar_Concentration 4.73e+00mol/m3, Size 1.35e+03m
DOI:10.13227/j.hjkx.201607171

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 16>

Accession number:20171003416434
Title:Influencing mechanism and spatio-temporal pattern of stomatal ozone flux of winter wheat under ozone pollution
Authors:Zhao, Hui (1, 2); Zheng, You-Fei (1, 2, 3); Cao, Jia-Chen (3); Xu, Jing-Xin (1, 2); Huang, Ji-Qing (1, 2); Yuan, Yue (3)
Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) School of Atmospheric Physics and Environment, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China; (3) School of Environmental Science and Engineering, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China
Corresponding author:Zheng, You-Fei(zhengyf@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:412-422
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:As one of the main atmospheric pollutants over surface layer, researches on the increasing surface ozone concentration and its impact on main crops have become the focus of every government and the public. In this paper, based on the observations in Nanjing using the main local cultivars in China's major winter wheat producing areas, it was expected to obtain the data including ozone concentration, meteorological data and stomatal conductance by continuous observation. Stomatal conductance model was used and parameterized, combined with flux model, we analyzed the characteristics of stomatal flux in winter wheat under ozone pollution. At the same time, the stomatal conductance and stomatal ozone absorption flux of winter wheat were simulated in Jiangsu Province. The main results were as follows: Elevated ozone concentration could reduce stomatal conductance of winter wheat leaf and stomatal conductance decreased with the increase of ozone concentration. According to the observational data through the experiment, based on the boundary line technology, stomatal conductance model was parameterized to simulate stomatal conductance of wheat leaves from environmental factors. Approximately 90%, 77% and 83% variation of measured stomatal conductance could be explained by the stomatal conductance model. In the experiment, the total ozone absorption flux in ozone concentration of CK(53.67 nL&middot;L<sup>-1</sup>), 100nL&middot;L<sup>-1</sup>, 150nL&middot;L<sup>-1</sup>was 6.42 mmol&middot;m<sup>-2</sup>, 12.27 mmol&middot;m<sup>-2</sup>, 13.90 mmol&middot;m<sup>-2</sup>respectively. The ozone concentration gradually increased from early period to late period during the period of winter wheat growth in Jiangsu area. The average stomatal conductance followed the order of the middle stage&gt;the later stage&gt;the early stage. Winter wheat ozone cumulative absorption flux was the highest during the middle stage. &copy; 2017, Science Press. All right reserved.
Number of references:36
Main heading:Air pollution
Controlled terms:Crops - Environmental technology - Meteorology - Ozone - Ozone layer - Pollution
Uncontrolled terms:Climate - Jiangsu province - Ozone flux - Stomatal - Winter wheat
Classification code:451  Air Pollution - 454  Environmental Engineering - 804  Chemical Products Generally - 821.4  Agricultural Products
Numerical data indexing:Percentage 7.70e+01%, Percentage 8.30e+01%, Percentage 9.00e+01%
DOI:10.13227/j.hjkx.201607074

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 17>

Accession number:20171003409570
Title:Isolation, identification and metabolic characteristics of a heterotrophic denitrifying sulfur bacterial strain
Authors:Tan, Wen-Bo (1); Ma, Xiao-Dan (1); Huang, Cong (1); Chen, Chuan (1); Wang, Ai-Jie (1, 2)
Author affiliation:(1) State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin; 150090, China; (2) Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China
Corresponding author:Wang, Ai-Jie(ajwang@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:809-814
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Organics, sulfide and nitrogen compounds in industrial wastewater are significant challenges for wastewater treatment. These pollutants could be removed simultaneously from wastewater treatment system using biological technologies. In this study, a heterotrophic denitrifying sulfur bacterial strain HDD1 was isolated from wastewater treatment bioreactor. Strain HDD1 was identified as Thauera sp. based on the 16S rRNA gene phylogenetic analysis and physiological characteristics. Acetate and sulfide could be utilized as electron donors and nitrate as electron acceptor for respiration in Thauera sp. HDD1. The acetate (300 mg&middot;L<sup>-1</sup>), sulfide (200 mg&middot;L<sup>-1</sup>) and nitrate (487 mg&middot;L<sup>-1</sup>) were completely metabolized and removed within 15 hours. The main product of sulfide oxidation was elemental sulfur as identified by scanning electron microscope and energy dispersive spectrometer. These results suggest that the newly isolated Thauera sp. HDD1 could be used for simultaneous industrial wastewater treatment and elemental sulfur resource recovery. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Wastewater treatment
Controlled terms:Biological water treatment - Chemicals removal (water treatment) - Denitrification - Industrial water treatment - Nitrates - Nitrogen compounds - Reclamation - RNA - Scanning electron microscopy - Spectrometers  - Sulfur - Sulfur compounds
Uncontrolled terms:Acetate - Elemental sulfur - Energy dispersive spectrometers - Industrial wastewater treatment - Metabolic characteristics - Physiological characteristics - Sulfide - Wastewater treatment system
Classification code:445.1  Water Treatment Techniques - 445.1.2  Water Treatment Techniques for Industrial Use - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 741.3  Optical Devices and Systems - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 2.00e-01kg/m3, Mass_Density 3.00e-01kg/m3, Mass_Density 4.87e-01kg/m3, Time 5.40e+04s
DOI:10.13227/j.hjkx.201608034

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 18>

Accession number:20171003416431
Title:Characteristics and evaluation of heavy metal pollution in vegetables in guangzhou
Authors:Chen, Zhi-Liang (1); Huang, Ling (1, 2); Zhou, Cun-Yu (2); Zhong, Song-Xiong (1); Wang, Xin (1); Dai, Yu (1); Jiang, Xiao-Lu (1)
Author affiliation:(1) South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou; 510655, China; (2) School of Horticulture and Garden, Yangtze University, Jingzhou; 434025, China
Corresponding author:Zhou, Cun-Yu(zhoucy@yangtzeu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:389-398
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Vegetable is an indispensible component of human daily diet, and contamination of vegetables by heavy metals directly threatens human health. In this study, 116 vegetable samples were collected from 12 administrative districts of Guangzhou City for analysis of six heavy metals, Cu, Zn, Pb, Cd, Ni, Cr. A combination of single factor evaluation and Nemero Index analysis was employed to determine specific heavy metals exceeding allowable standards and analyze the characteristics of pollution. Risk of exposure was utilized to assess human health risks originating from eating locally planted vegetables contaminated by heavy metals. The results showed that contents of Cu, Zn in the 8 sorts of vegetables were below the standards of maximum allowable content and the contents of heavy mental Cr of up to 91.67% vegetable samples were higher than their standard. Lettuce sativa var. angustana Irish, Luffa acutangula L., Lycopersicon esculentum Mill. and Daucus carota L. were the 4 species of Pb exceeding vegetables, with the exceed ratio reaching up to 35.71% and Daucus carota L. exceeded the target value most seriously. Only the content of Cd in Lycopersicon esculentum Mill. was over-standard,with the rate of 31.25%. And the highest rate of over-standard of the content of Ni in 3 species of vegetables, which included Lactuca sativa L., Ipomoea aquatica Forsk and Brassica parachinensis, reached 8.33%. For the contamination level of the eight kinds of vegetable, Lactuca sativa L., Ipomoea aquatica Forsk, Brassica parachinensis, Raphanus sativus L. and Daucus carota L. were put into the class of alarming, while Lettuce sativa var. angustana Irish, Luffa acutangula L. and Lycopersicon esculentum Mill. were classified as secure. Heavy metals' comprehensive pollution degree of 4 species of vegetables presented a trend of leafy vegetables&gt;rootstalk vegetables&gt;stem vegetables&gt;solanaceous fruits. Health risk assessment showed that Guangzhou citizens eat more frequently Ipomoea aquatica Forsk and Lactuca sativa L. and Brassica parachinensis were prone to higher accumulation of heavy metals, and the dietary intake of heavy metal Cr might cause harm to human health and intake of Cd would bring potential health risk to the human body. Risk of exposure to heavy metal through oral ingestion of vegetables was proved to be higher for children than adults. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Copper
Controlled terms:Cadmium - Chemical contamination - Fruits - Health - Health risks - Heavy metals - Lead - Metal analysis - Nickel - Pollution  - Risk assessment - Value engineering - Vegetables - Zinc
Uncontrolled terms:Characteristics of pollution - Contamination levels - Guangzhou - Health evaluation - Heavy metal pollution - Lycopersicon esculentum Mill - Potential health risks - Single factor evaluation
Classification code:461.6  Medicine and Pharmacology - 461.7  Health Care - 531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4  Agricultural Products - 822.3  Food Products - 911.5  Value Engineering - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 3.12e+01%, Percentage 3.57e+01%, Percentage 8.33e+00%, Percentage 9.17e+01%
DOI:10.13227/j.hjkx.201606138

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 19>

Accession number:20171003416387
Title:Interactive effects of the influencing factors on the changes of PM<inf>2.5</inf>concentration based on gam model
Authors:He, Xiang (1, 2, 3, 4, 5); Lin, Zhen-Shan (1, 3, 4, 5)
Author affiliation:(1) College of Geography Science, Nanjing Normal University, Nanjing; 210023, China; (2) Institute of Tourism, Kaili University, Kaili; 556011, China; (3) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing; 210023, China; (4) State Key Laboratory Cultivation Base of Geographical Environment Evolution, Nanjing; Jiangsu Province; 210023, China; (5) Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing; 210023, China
Corresponding author:Lin, Zhen-Shan(linzhenshan@njnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:22-32
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this paper, the generalized additive model (GAM) was introduced to analyze the interactive effects of the influencing factors on the change of PM<inf>2.5</inf>concentration during 2013-2015 in Nanjing city. The results showed as follows: PM<inf>2.5</inf>and its influencing factors appeared to follow normal distribution. There were strong correlations among the influencing factors, especially among the temperature(TEM), pressure(PRS) and water vapor pressure(VAP). For the single influencing factor GAM models of PM<inf>2.5</inf>concentration, all influencing factors passed the significance test. Moreover, the equation fitting degrees of SO<inf>2</inf>, CO, and NO<inf>2</inf>were much higher. In the multiple influencing factors GAM models of PM<inf>2.5</inf>concentration, the contribution of the SO<inf>2</inf>, CO, NO<inf>2</inf>, O<inf>3</inf>, precipitation (PRE), wind and relative humidity(RHU) to the change of PM<inf>2.5</inf>concentration was 73.9% with significant impacts on the change of PM<inf>2.5</inf>concentration. Based on the diagnostic analysis of the effect of multi factors on the change of PM<inf>2.5</inf>concentration, there were linear relationship between PM<inf>2.5</inf>and SO<inf>2</inf>, NO<inf>2</inf>and wind, and non-linear relationship between PM<inf>2.5</inf>and CO, O<inf>3</inf>, PRE and RHU. The GAM models, which considered the interaction of SO<inf>2</inf>respectively with CO, PRE and RHU, the interaction of CO respectively with NO<inf>2</inf>, O<inf>3</inf>, PRE, Wind and RHU, and the interaction of NO<inf>2</inf>respectively with Wind, PRE and RHU, all passed the significance test(P&lt;0.01 or P&lt;0.05). The interaction of SO<inf>2</inf>, CO and NO<inf>2</inf>respectively with other factors such as meteorological factors had the most important influence on the change of PM<inf>2.5</inf>concentration. At last, through the visualized three-dimensional map of the GAM models considering the interaction of the influencing factors on the PM<inf>2.5</inf>concentration, the interactive effects of the influencing factors on PM<inf>2.5</inf>concentration were quantitatively modeled. Our results demonstrated that GAM could be used to quantitatively analyze the interactive effect of the influencing factors on the change of PM<inf>2.5</inf>concentration. Therefore, the research method is innovative and important for PM<inf>2.5</inf>pollution and control. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Nitrogen oxides
Controlled terms:Normal distribution - Pollution control - Sulfur dioxide
Uncontrolled terms:Generalized additive model - Influencing factors - Interaction - Linear relationships - Meteorological factors - Nanjing cities - Non-linear relationships - Three-dimensional maps
Classification code:804.2  Inorganic Compounds - 922.1  Probability Theory
Numerical data indexing:Percentage 7.39e+01%
DOI:10.13227/j.hjkx.201606061

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 20>

Accession number:20172603860986
Title:Degradation of the Disperse Dye Neocron Black(NB) by Biological Treatment
Authors:Yang, Bo (1, 2); Ding, Feng-You (1, 2); Xu, Hui (1, 2); Li, Fang (1, 2); Tian, Qing (1, 2); Ma, Chun-Yan (1, 2)
Author affiliation:(1) State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai; 201620, China; (2) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1520-1528
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The biodegradation characteristics of the azo disperse dye neocron black (NB) were investigated under aerobic, anaerobic and anaerobic/aerobic conditions separately with the activated sludge system, and the biological degradation process of the dye was analyzed by spectrophotometry and gas chromatography mass spectrometry (GC-MS). The results showed that the degradation efficiency of NB dye was the highest under fully aerobic conditions, followed by the anaerobic/aerobic conditions, and fully anaerobic condition was the lowest. With the increase of the concentration of NB dye, the dye and the intermediate metabolite greatly decreased the microbial degradation efficiency of NB dye. The addition of carbon source could not only promote the biodegradation of NB dye, but also change the kinetic characteristics of the biodegradation process. The spectrophotometry and GC-MS determination results showed that the chromophore was completely degraded after biodegradation of NB dye. The intermediates metabolites of NB dye included 2,4-Dinitroaniline, 2-cyano-4-nitro aniline, p-Nitroaniline etc. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Biodegradation
Controlled terms:Activated sludge process - Aniline - Carbon - Chromophores - Degradation - Efficiency - Gas chromatography - Mass spectrometry - Metabolites - Spectrophotometry
Uncontrolled terms:Aerobic - Alternating aerobic/anaerobic condition - Anaerobic - Disperse dyes - Neocron black (NB)
Classification code:452.2  Sewage Treatment - 801  Chemistry - 801.2  Biochemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 913.1  Production Engineering - 941  Acoustical and Optical Measuring Instruments
DOI:10.13227/j.hjkx.201603007

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 21>

Accession number:20172603860978
Title:Identification and PAC Adsorption of Foulants Responsible for Irreversible Fouling During Ultrafiltration of Dongjiang River Water
Authors:Yang, Hai-Yan (1, 2); Wang, Can (3); Yan, Zhong-Sen (2); Li, Dong-Ping (1); Zhao, Yan (1); Qu, Fang-Shu (2); Liang, Heng (2); Xu, Ye-Qin (1); Li, Gui-Bai (2)
Author affiliation:(1) Guangdong GDH Water Co., Ltd., Shenzhen; 518021, China; (2) School of Environmental and Municipal Engineering, Harbin Institute of Technology, Harbin; 150090, China; (3) School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao; 266033, China
Corresponding author:Li, Gui-Bai(liguibai@vip.163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1460-1466
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Foulants responsible for hydraulic irreversible fouling in Dongjiang River water were identified by ultrafiltration process and their removal by powdered activated carbon (PAC) adsorption treatment was investigated using fluorescent excitation emission matrix and parallel factor analysis (EEM-PARAFAC). A correlation analysis was then carried out for samples between the maximum fluorescence intensities (F<inf>max</inf>) of three PARAFAC components after PAC adsorption and the surface properties of corresponding PAC samples. The results showed that two humic-like (C1 and C3) and one tryptophan-like fluorescent components were obtained through PARAFAC analysis, in which tryptophan-like component C2 was found to be the main substance in hydraulic irreversible foulants extracted from fouled membrane. Furthermore, the results of correlation analysis suggested that microspore area of PAC correlated with PAC adsorption of tryptophan-like fluorescent components, which played an important role in irreversible fouling. Both BET and mesopore+macropore area of PAC correlated with its adsorption of humic-like fluorescent components. The result provided support for selecting PAC in PAC-ultrafiltration hybrid process, which would be more effective for fouling control. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Factor analysis
Controlled terms:Activated carbon - Activated carbon treatment - Adsorption - Amino acids - Biological materials - Correlation methods - Fluorescence - Fouling - Multivariant analysis - Ultrafiltration  - Water resources
Uncontrolled terms:Correlation analysis - Excitation emission matrices - Fluorescence intensities - Foulants - Natural organic matters - Parallel factor analysis - Powdered activated carbon - Ultrafiltration process
Classification code:444  Water Resources - 461.2  Biological Materials and Tissue Engineering - 741.1  Light/Optics - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 922  Statistical Methods - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201609013

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 22>

Accession number:20172603860967
Title:Water Quality Analysis of Beijing Segment of South-to-North Water Diversion Middle Route Project
Authors:Xu, Hua-Shan (1); Zhao, Lei (1); Sun, Hao-Su (1); Ren, Yu-Fen (2); Ding, Tao (1); Chang, Shuai (1); Wang, Hai-Dong (1); Li, Miao (1); Guo, Zhao (1)
Author affiliation:(1) Daning Management Office of the Beijing South-to-North Water Diversion, Beijing; 102442, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China
Corresponding author:Ren, Yu-Fen(yfren@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1357-1365
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Water quality is the key problem that water management departments concern. Water quality of Beijing segment of South-to-North Water Diversion Middle Route Project is closely related to water security and social stability in Beijing. Since the connection of Beijing part in Middle Route of South-to-North Diversion Project, water quality data of Daning regulation and storage reservoir and Daning surge tank was collected, and water quality indexes including water temperature, total nitrogen, nitrate nitrogen, chloride ion, sulfate, dissolved oxygen, permanganate index, pH, ammonia nitrogen, fluorine ion and total phosphorus, were monitored monthly. With variance analysis, water quality difference among different water sources of the South-to-North Water Diversion of Middle Route was analyzed. With factor analysis method, the water quality risk factors of Daning regulation and storage reservoir and Daning surge tank were identified. The results were as following, water from Hebei province had higher contents of nitrate nitrogen, total nitrogen, fluorine ion, chloride ion and sulfate than those of water from Danjiangkou reservoir, but the water quality was not as good as that from Danjiangkou reservoir. LSD difference test results showed that the dissolved oxygen, nitrate nitrogen and total nitrogen of the water from Hebei province had significant differences (P&lt;0.05) between flood season and non-flood season, there was significant difference (P&lt;0.05) in pH of water from Danjiangkou reservoir between flood season and non-flood season, and the water quality of Danjiangkou reservoir was more stable than water from Heibei province. No matter in flood season or non-flood season, there were no significant differences (P&lt;0.05) in pH, dissolved oxygen, permanganate index, total phosphorus and ammonia nitrogen between the water from Danjiangkou reservoir and Heibei province, but there were significant differences (P&lt;0.05) in nitrate nitrogen, total nitrogen, fluorine ion and sulfate ion and chloride ion. Contents of Nitrate nitrogen, total nitrogen, sulfate and chloride ion in 2015 (the mixture of water from Hebei province and Danjiangkou reservoir) in Daning regulation and storage reservoir were lower than those in 2012-2014 (water from Hebei province), and the water from Danjiangkou reservoir played a key role in dilution and adjustment of the water from Hebei province in Daning regulation and storage reservoir. The water quality differences test results between 2012-2014 and 2015 showed that there were significant differences (P&lt;0.05) in the nitrate nitrogen, total nitrogen, fluorine ion, sulfate and chloride ion both in flood season and non-flood season, and the water quality of 2015 was better than that of 2012~2014 in non-flood season, but the differences of pH, dissolved oxygen, permanganate index, total phosphorus, ammonia nitrogen were not obvious (P&lt;0.05). The difference test results between Daning regulation and storage reservoir and Daning surge tank showed that Permanganate index, total nitrogen, fluorine ion, sulfate and chloride ion had significant differences (P&lt;0.05) both in flood season and non-flood season, and the contents of permanganate index, fluorine ion, sulfate and chloride ions in Daning regulation and storage reservoir were higher than those in Daning surge tank. The factor analysis results indicated that water quality potential risk factors both in Daning regulation and storage reservoir and Daning surge tank were mainly nitrogen, including ammonia nitrogen, nitrate nitrogen and total nitrogen, and potential risk factors also included total phosphorus in Daning regulation and storage reservoir. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Reservoirs (water)
Controlled terms:Ammonia - Biochemical oxygen demand - Chlorine compounds - Digital storage - Dissolution - Dissolved oxygen - Factor analysis - Flood control - Floods - Fluorine  - Ions - Multivariant analysis - Nitrates - Nitrogen - Oxygen - Phosphorus - Quality control - Risk assessment - Sulfur compounds - Surge tanks  - Tanks (containers) - Water management - Water quality
Uncontrolled terms:Danjiangkou reservoir - Factor analysis method - South to North water diversion - Storage reservoirs - Water quality analysis - Water quality data - Water quality indexes - Water temperatures
Classification code:441.2  Reservoirs - 445.2  Water Analysis - 619.2  Tanks - 722.1  Data Storage, Equipment and Techniques - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 913.3  Quality Assurance and Control - 914.1  Accidents and Accident Prevention - 922  Statistical Methods - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201607068

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 23>

Accession number:20172603860959
Title:Dry and Bulk Nitrogen Deposition in Suburbs of Xining City
Authors:Xu, Wen (1, 2); Jin, Xin (3); Luo, Shao-Hui (3); Feng, Zhao-Zhong (2); Zhang, Lin (4); Pan, Yue-Peng (5); Liu, Xue-Jun (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Bureau of Qinghai Meteorology, Xining; 810001, China; (4) Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing; 100871, China; (5) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China
Corresponding author:Liu, Xue-Jun(liu310@cau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1279-1288
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study conducted a full two-year (2014 and 2015) measurements of dry and bulk deposition of atmospheric inorganic nitrogen (N) at the suburb of Xining city, Qinghai province. Dry N deposition fluxes were calculated by multiplying the atmospheric concentrations of NH<inf>3</inf>and NO<inf>2</inf>measured using passive samplers with the modeled dry deposition velocities provided by the GEOS-Chem global chemical transport model, while bulk N deposition fluxes were measured using precipitation gauge. Annual mean concentrations of gaseous NH<inf>3</inf>and NO<inf>2</inf>averaged 8.8 and 19.6 &mu;g&middot;m<sup>-3</sup>, respectively, with significantly higher values in 2015 than in 2014. Seasonal mean NH<inf>3</inf>concentrations were higher in spring and summer than in autumn and winter, but the concentrations of NO<inf>2</inf>changed little from season to season, with a small peak in autumn. Annual mean concentrations of NH<inf>4</inf><sup>+</sup>-N and NO<inf>3</inf><sup>-</sup>-N in precipitation averaged 2.2 and 1.8 mg&middot;L<sup>-1</sup>, respectively. Concentrations of NH<inf>4</inf><sup>+</sup>-N in autumn were~55% lower than those in other seasons, whereas those of NO<inf>3</inf><sup>-</sup>-N in autumn or winter were~26% higher than those in spring and summer. Dry deposition of NH<inf>3</inf>and NO<inf>2</inf>was 9.0 and 2.8 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>, respectively. Bulk deposition of NH<inf>4</inf><sup>+</sup>-N and NO<inf>3</inf><sup>-</sup>-N in precipitation was 7.6 and 6.2 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>, respectively. Reduced N (gaseous NH<inf>3</inf>and NH<inf>4</inf><sup>+</sup>-N in precipitation) was the dominant form of N deposition. The total dry and wet N deposition was 25.6 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>, which represented significant nutrient input from the environment to the suburban farmland, but this amount of deposited N exceeded the critical loads [10-20 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>] of terrestrial ecosystems, suggesting a risk of &ldquo;N saturation&rdquo; in the local natural environment. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Nitrogen oxides
Controlled terms:Atmospheric chemistry - Atmospheric movements - Meteorological instruments - Nitrogen - Nitrogen compounds
Uncontrolled terms:Atmospheric concentration - Chemical transport models - Dry deposition - Dry deposition velocities - Suburban areas - Terrestrial ecosystems - Tibetan Plateau - Wet deposition
Classification code:443.1  Atmospheric Properties - 443.2  Meteorological Instrumentation - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.80e-03kg/m3, Mass_Density 2.20e-03kg/m3
DOI:10.13227/j.hjkx.201609237

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 24>

Accession number:20172603860988
Title:Short-cut Nitrification Recovery and Its Transformation into CANON Process in a Biofilm Reactor
Authors:Fu, Kun-Ming (1); Zhou, Hou-Tian (1); Su, Xue-Ying (1); Wang, Hui-Fang (1)
Author affiliation:(1) Key Laboratory of Urban Storm Water System and Water Environment, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1536-1543
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A short-cut nitrification process with modified polyethylene as carrier was operated to investigate the biofilm short-cut nitrification recovery using synthetic inorganic ammonia-rich wastewater as influent at 30&#8451; &plusmn;1&#8451;. The short-cut nitrification was destroyed first by excessive aeration, and it was not built in 83 days under the condition of continuous aeration with DO less than 0.5 mg&middot;L<sup>-1</sup>and free ammonia (FA) more than 1.5 mg&middot;L<sup>-1</sup>, which are very beneficial to short-cut nitrification. However, short-cut nitrification was realized by changing continuous aeration to intermittent aeration on 84<sup>th</sup>day, and it was proved again on 142nd day. After that, biofilm system provided a living environment for ANAMMOX bacteria, anaerobic ammonia oxidation occurred, and the biofilm short-cut nitrification process was gradually transformed into CANON process. As the load of influent and aeration increased, the total nitrogen removal efficiency and removal load increased, and the total nitrogen removal load could reach up to 2.52 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>. Finally, in the 3rd stage, &Delta;NO<inf>3</inf><sup>-</sup>-N/&Delta;TN was 0.10 on average, which means stabe short-cut nitrification in the CANON process. Therefore, once NOB was adapted to FA, it would be not very easy to recover short-cut nitrification, while intermittent aeration was an effective way, and the nitriation process would be finally transformed into CANON process, which would further improve the short-cut nitrification stability. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Nitrification
Controlled terms:Ammonia - Biofilms - Nitration - Nitrogen - Nitrogen removal - Recovery - Wastewater treatment
Uncontrolled terms:Anaerobic ammonium oxidation - Excessive aeration - Free ammonia - Intermittent aeration - Living environment - Nitrification process - Nitrite accumulation - Total nitrogen removal
Classification code:452.4  Industrial Wastes Treatment and Disposal - 462.5  Biomaterials (including synthetics) - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 2.27e-01yr, Mass_Density 1.50e-03kg/m3, Mass_Density 5.00e-04kg/m3
DOI:10.13227/j.hjkx.201609233

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 25>

Accession number:20172603860979
Title:Efficiency and Kinetics of Triclosan Degradation in Aqueous Solution by UV/Sodium Persulfate
Authors:Li, Qing-Song (1); Li, Xue-Yan (2); Yao, Ning-Bo (1, 2); Luo, Jing-Yu (1, 2); Li, Guo-Xin (1); Chen, Guo-Yuan (1); Gao, Nai-Yun (3)
Author affiliation:(1) Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen; 361024, China; (2) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) National Key Laboratory of Pollution Control and Reuse, Tongji University, Shanghai; 200092, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1467-1476
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:UV activated sodium persulfate was employed to remove triclosan (TCS) in aqueous solution. The effects of several factors such as UV wavelength, UV<inf>254</inf>intensity, sodium persulfate dosage, pH value, and HA on TCS degradation were investigated. The second-order rate constants of free radicals (&middot;OH, SO<inf>4</inf><sup>&middot;-</sup>) reacting with TCS and their contributions to TCS removal were determined, respectively. The dominant free radical was also identified. Furthermore, the TCS degradation efficiency in natural water by UV<inf>254</inf>/SPS and UV<inf>254</inf>/H<inf>2</inf>O<inf>2</inf>was compared. Finally, the possible pathway and intermediate products of TCS degradation were analyzed with GC/MS. The results indicated that UV<inf>254</inf>activated sodium persulfate could effectively remove TCS. The removal rate of TCS could reach 98.15% within 100s under the conditions of UV wavelength of 254 nm,UV intensity of 11.5&mu;W&middot;cm<sup>-2</sup>,sodium persulfate dosage of 1mmol&middot;L<sup>-1</sup>,and TCS initial concentration of 275 &mu;g&middot;L<sup>-1</sup>. TCS degradation followed the pseudo-first-order kinetic model and the pseudo-first-order rate constant was determined to be 0.039 2 s<sup>-1</sup>. Pseudo-first-order rate constant for TCS degradation increased with the increase of UV<inf>254</inf>intensity(I)and sodium persulfate dosage within experiment ranges. The effect of UV wavelength on TCS removal was not notable. Neutral condition was detrimental to TCS degradation. TCS removal was inhibited in the presence of HA. The reaction rate constants for &middot;OH and SO<inf>4</inf><sup>&middot;-</sup>reacting with TCS were 7.62&times;10<sup>9</sup>L&middot;mol<sup>-1</sup>&middot;s<sup>-1</sup>and 9.86&times;10<sup>9</sup>L&middot;mol<sup>-1</sup>&middot;s<sup>-1</sup>,respectively. SO<inf>4</inf><sup>&middot;-</sup>was the dominant free radical and its contribution rate to TCS removal was 97.63% in UV<inf>254</inf>/SPS system. The K value of UV<inf>254</inf>/SPS was 4.13 times higher than that of UV<inf>254</inf>/H<inf>2</inf>O<inf>2</inf>process,which demonstrated that UV<inf>254</inf>/SPS process could remove TCS more effectively than UV<inf>254</inf>/H<inf>2</inf>O<inf>2</inf>. The main intermediate products found were 2,4-DCP and phenol in the degradation process of TCS in Milli-Q water by UV<inf>254</inf>/SPS. &copy; 2017, Science Press. All right reserved.
Number of references:36
Main heading:Rate constants
Controlled terms:Biodegradation - Chemical analysis - Chromatographic analysis - Degradation - Efficiency - Enzyme kinetics - Free radicals - Kinetics - Sodium - Solutions
Uncontrolled terms:Degradation efficiency - Initial concentration - Intermediates - Pseudo first order rate constants - Pseudo-first order kinetic model - Second-order rate constants - Sodium persulfate - Triclosan
Classification code:461.8  Biotechnology - 549.1  Alkali Metals - 802.2  Chemical Reactions - 913.1  Production Engineering - 931  Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Mass_Density 2.75e-04kg/m3, Molar_Concentration 1.00e+00mol/m3, Percentage 9.76e+01%, Percentage 9.82e+01%, Size 2.54e-07m, Surface_Power_Density 1.15e-01W/m2, Time 1.00e+02s
DOI:10.13227/j.hjkx.201609211

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 26>

Accession number:20172603860984
Title:Removal of Estrogenic Effect by Typical Domestic Wastewater Treatment Processes
Authors:Zhang, Qiu-Ya (1); Ma, Xiao-Yan (1); Wang, Xiao-Chang (1); You, Meng (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Corresponding author:Wang, Xiao-Chang(xcwang@xauat.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1506-1512
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Targeting at the characteristics of low concentration but high risk of endocrine disrupting compounds in the aquatic environment, the current study investigated the distribution of estrogenicity and E2 level using recombinant yeast estrogen screen (YES) and enzyme linked immunosorbent assay (ELSIA) during domestic wastewater treatment processes. The results showed that the levels of estrogenicity and E2 in influents of wastewater treatment plants were 4.35-7.58 ng&middot;L<sup>-1</sup>and 36.95-83.43 ng&middot;L<sup>-1</sup>, respectively. It was found that biological treatment processes played a crucial role in the removal of estrogenicity and E2, such as oxidation ditch, A<sup>2</sup>/O and A<sup>2</sup>/O followed by MBR, where the removal of estrogenicity and E2 was 71.10%-75.54% and 75.88%-80.72%, respectively. The activated sludge, with an estrogencity level of 1.84-2.43 ng&middot;g<sup>-1</sup>and an E2 level of 8.45-12.84 ng&middot;g<sup>-1</sup>, had the function of eliminating estrogenic effect to a certain extent by adsorption. The estrogenic activity in the effluent of domestic wastewater was 1.06-2.19 ng&middot;L<sup>-1</sup>, which will pose potential risk to the aquatic life in the environment. Last but not least, ELISA had a good correlation with YES assay, which provides a new method for rapid screening and assessment of water environmental estrogen. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Wastewater treatment
Controlled terms:Activated sludge process - Effluents - Endocrinology - Enzymes - Reclamation - Removal - Sewage lagoons - Sewage treatment plants - Wastewater - Yeast
Uncontrolled terms:Biological treatment process - Domestic waste water treatment - Endocrine disrupting compound - Environmental estrogens - Enzyme linked immunosorbent assay - Estrogenicity - Wastewater treatment plants - Yeast estrogen screen
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.6  Medicine and Pharmacology - 822.3  Food Products
Numerical data indexing:Mass_Density 1.06e-09kg/m3 to 2.19e-09kg/m3, Mass_Density 3.70e-08kg/m3 to 8.34e-08kg/m3, Mass_Density 4.35e-09kg/m3 to 7.58e-09kg/m3, Percentage 7.11e+01% to 7.55e+01%, Percentage 7.59e+01% to 8.07e+01%
DOI:10.13227/j.hjkx.201607232

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 27>

Accession number:20172603861004
Title:Alleviation Effects of Exogenous Melatonin on Ni Toxicity in Rice Seedings
Authors:Liu, Shi-Xiang (1, 2); Huang, Yi-Zong (1); Luo, Ze-Jiao (2); Huang, Yong-Chun (1); Jiang, Hang (1)
Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin; 300191, China; (2) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China
Corresponding author:Huang, Yi-Zong(yizonghuang@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1675-1682
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The alleviation effect of exogenous melatonin (MT) on Ni toxicity in rice seedings was investigated. The results showed that low concentration of Ni stress (10, 50 &mu;mol&middot;L<sup>-1</sup>) had little effect on the growth of root of rice seedings, while higher concentration of Ni stress (100-1 000 &mu;mol&middot;L<sup>-1</sup>) significantly inhibited the growth of rice root. Compared with the control treatment, the addition of 100 and 1 000 &mu;mol&middot;L<sup>-1</sup>Ni would decrease the total length and surface area of root by 63.3%-98.0% and 56.9%-96.3%, respectively. The results showed that addition of exogenous melatonin had a positive effect on the growth of rice seedings under Ni stress. This kind of positive effect was even more obvious in the root of rice seedings. The total length of rice root decreased by 58.4%-83.8% at Ni concentration of 100 &mu;mol&middot;L<sup>-1</sup>, whereas it decreased by only 8.7%-29.1% when 100 &mu;mol&middot;L<sup>-1</sup>Ni and 10 &mu;mol&middot;L<sup>-1</sup>MT were added, compared with the control treatment. The addition of exogenous melatonin had significant alleviation effects on oxidative stress in rice seedings caused by Ni. Compared with the 100 &mu;mol&middot;L<sup>-1</sup>Ni treatment, addition of 10 &mu;mol&middot;L<sup>-1</sup>exogenous MT could significantly decrease the production rate of O<inf>2</inf><sup>-&middot;</sup>by 43.2%-50.2% and the relative electrolytic leakage by 25.7%-31.6%, whereas increase the activities of CAT by 21.9%-33.7% and the soluble protein content by 82.6%-84.6%. The results suggested that application of exogenous melatonin could effectively alleviate the toxic effects of Ni on rice seedings. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Nickel
Controlled terms:Hormones - Toxicity
Uncontrolled terms:Alleviation effect - Antioxidant systems - Control treatments - Low concentrations - Melatonin(MT) - Production rates - Rice - Soluble proteins
Classification code:461.2  Biological Materials and Tissue Engineering - 461.7  Health Care - 548.1  Nickel
Numerical data indexing:Molar_Concentration 1.00e-01mol/m3 to 1.00e+00mol/m3, Molar_Concentration 1.00e-01mol/m3, Molar_Concentration 1.00e-02mol/m3, Molar_Concentration 5.00e-02mol/m3, Percentage 2.19e+01% to 3.37e+01%, Percentage 2.57e+01% to 3.16e+01%, Percentage 4.32e+01% to 5.02e+01%, Percentage 5.69e+01% to 9.63e+01%, Percentage 5.84e+01% to 8.38e+01%, Percentage 6.33e+01% to 9.80e+01%, Percentage 8.26e+01% to 8.46e+01%, Percentage 8.70e+00% to 2.91e+01%
DOI:10.13227/j.hjkx.201609139

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 28>

Accession number:20171003416415
Title:Mechanism for effects of high free ammonia loadings on biological nitrification
Authors:Ji, Min (1); Liu, Ling-Jie (1); Zhai, Hong-Yan (1); Liu, Jing (1); Su, Xiao (1)
Author affiliation:(1) School of Environmental Science and Engineering, Tianjin University, Tianjin; 300350, China
Corresponding author:Zhai, Hong-Yan(zhaihy@tju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:260-268
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Wastewater treatment plants treating industrial wastewater and municipal wastewater may suffer from unexpected shock loads of high ammonia concentrations, which can lead to inhibition of biological nitrification and failure to meet the wastewater discharge standards. In order to solve the problem of failure to meet the standards, the effects of high loadings of free ammonia (FA) on the nitrification process were investigated in this work using a sequencing batch reactor (SBR). For such purpose, maximum specific degradation rates of ammonia, maximum specific formation rates of nitrate, specific oxygen uptake rates and abundances of nitrifying bacteria were monitored. The results showed that FA promoted nitrification activities at low concentrations and inhibited the activities when the FA concentration exceeded a certain value. In addition, high loading concentrations of FA resulted in long recovery times. When the FA concentration increased from 3.6 mg&middot;L<sup>-1</sup>to 8.1 mg&middot;L<sup>-1</sup>, the abundances of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) increased slightly, as shown by the fluorescence in situ hybridization tests. However, there were apparent decreases in the abundances of AOB and NOB when the concentration of FA was higher than 8.1 mg&middot;L<sup>-1</sup>. The critical FA inhibitory concentrations for AOB and NOB were 8.1 mg&middot;L<sup>-1</sup>and 6.6 mg&middot;L<sup>-1</sup>. It was found that the NOB flora were more sensitive than AOB to FA inhibition. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Bacteria
Controlled terms:Ammonia - Batch reactors - Biodegradation - Biological water treatment - Degradation - Enzyme inhibition - Fluorescence microscopy - Industrial plants - Industrial water treatment - Lead removal (water treatment)  - Nitrification - Wastewater treatment
Uncontrolled terms:Ammonia nitrogen wastewaters - Ammonia oxidizing bacteria - Fluorescence in situ hybridization - Free ammonia - Nitrifying bacteria - Nitrite-oxidizing bacteria - Specific oxygen uptake rate - Wastewater treatment plants
Classification code:445.1  Water Treatment Techniques - 445.1.2  Water Treatment Techniques for Industrial Use - 452.4  Industrial Wastes Treatment and Disposal - 461.8  Biotechnology - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 931.4  Quantum Theory; Quantum Mechanics
Numerical data indexing:Mass_Density 3.60e-03kg/m3 to 8.10e-03kg/m3, Mass_Density 6.60e-03kg/m3, Mass_Density 8.10e-03kg/m3
DOI:10.13227/j.hjkx.201607116

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 29>

Accession number:20171003409560
Title:Remediation of decabromodiphenyl ether contaminated sediment through plant roots enhanced by exogenous microbes
Authors:Yang, Lei-Feng (1); Yin, Hua (1); Peng, Hui (2); Li, Yue-Peng (3)
Author affiliation:(1) Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, College of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Department of Chemistry, Jinan University, Guangzhou; 510632, China; (3) Guangzhou Hailin Electronic Technology Co., Ltd., Guangzhou; 510407, China
Corresponding author:Yin, Hua(huayin@scut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:721-727
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Decabromodiphenyl ether (BDE-209), a main ingredient of brominated flame retardants, has drawn more and more attention because of the pollution it caused in sediment. A pot experiment was conducted in a greenhouse to investigate the impact of Brevibacillus brevis and Enterococcus casselifavus on the enhancement of phytoremediation by Thalia dealbata, which is common in the river bank and was found to be an effective plant for BDE-209 removal. The concentration of organic acids, the amount of microorganisms and the ability of carbon utilization of soil microorganisms in different experimental groups were analyzed. The results showed that the removal rate of BDE-209 in the exogenous microbes containing groups were higher than that of the control. And B. brevis presented the highest enhancement of phytoremediation with the removal rate rising highest to 66% compared with the control (non-rhizosphere group 37.93% and no plant group 39.27%) after 60 days. The removal of BDE-209 in sediment, quantity of microorganism, concentration of organic acids and the ability of carbon utilization of soil microorganisms in rhizosphere sediment were higher than those in non-rhizosphere sediment. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Microorganisms
Controlled terms:Bacteria - Bioremediation - Ethers - Flame retardants - Organic acids - Pollution - River pollution - Sediments - Soil pollution control - Soils
Uncontrolled terms:Brevibacillus brevis - Brominated flame retardants - Contaminated sediment - Decabromodiphenyl ethers - Decabromodiphenyl ethers (BDE209) - Experimental groups - Plant - Soil micro-organisms
Classification code:453  Water Pollution - 454.2  Environmental Impact and Protection - 461.9  Biology - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds
Numerical data indexing:Age 1.64e-01yr, Percentage 3.79e+01%, Percentage 3.93e+01%, Percentage 6.60e+01%
DOI:10.13227/j.hjkx.201606180

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 30>

Accession number:20171003409526
Title:Correlation of speciated mercury with carbonaceous components in atmospheric PM<inf>2.5</inf>in Shengsi Region
Authors:Cheng, Na (1); Qian, Guan-Lei (2); Duan, Lian (1); Zhao, Meng-Fei (1); Xiu, Guang-Li (1)
Author affiliation:(1) State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources &amp; Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) Environmental Monitoring Station of Shengsi, Zhoushan; 202450, China
Corresponding author:Xiu, Guang-Li(xiugl@ecust.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:438-444
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:PM<inf>2.5</inf>samples of four seasons were collected from Nov. 2014 to Aug. 2015 at the site of Shengsi island in Zhoushan islands. Mercury (Hg) and speciated mercury concentrations in PM<inf>2.5</inf>samples were measured by Atomic Fluorescence Spectrometry (AFS-9130, China) after digestion with CEM Mars Xpress (PyNN Corporation, USA). The concentrations of organic carbon (OC) and elemental carbon (EC) in PM<inf>2.5</inf>samples were determined by thermal/optical carbon analyzer (DRI, USA). The results showed that the daily concentrations of PM<inf>2.5</inf>-bounded mercury (PBM) ranged from 0.02 to 1.25 ng&middot;m<sup>-3</sup>. Moreover, the mass content of PBM was (12.46&plusmn;18.79) &mu;g&middot;g<sup>-1</sup>, which was higher than those in continental cities. ANOVA analysis result suggested that the highest average mass concentrations of PBM occurred in fall, sequentially followed by spring, winter and summer. Higher concentrations of PBM were in fall and spring, which might be related to biomass burning. In addition, RPM took the highest fraction of 53.1% in PBM, followed by HPM (27.3%) and EPM (19.7%), which might be resulted from the complicated composition of marine aerosols. The strong correlations among OC, EC and PBM indicated that carbonaceous composition may affect the transport of Hg in the atmosphere. The ratio of OC/EC represents atmospheric photo-oxidation capacity, so the positive correlation between OC/EC ratio and HPM indicated that HPM was resulted from atmospheric gas-particle transformation. The negative correlation between Char-EC/soot-EC and mercury species indicated that the atmospheric particle-bounded mercury might come mainly from the input of external mercury sources. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Mercury (metal)
Controlled terms:Fluorescence spectroscopy - Organic carbon
Uncontrolled terms:Atmospheric particles - Atomic fluorescence spectrometry - Carbonaceous components - Island - Mass concentration - Mercury species - Negative correlation - Positive correlations
Classification code:549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 741.3  Optical Devices and Systems - 804.1  Organic Compounds
Numerical data indexing:Percentage 1.97e+01%, Percentage 2.73e+01%, Percentage 5.31e+01%
DOI:10.13227/j.hjkx.201607203

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 31>

Accession number:20171003409533
Title:Characteristics of mercury emissions from coal-fired power plants in Chongqing
Authors:Zhang, Cheng (1, 2); Zhang, Ya-Hui (1); Wang, Yong-Min (1); Wang, Ding-Yong (1, 2); Xu, Feng (3); Yang, Xi (3); He, Xiu-Qing (3)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China; (3) Chongqing Solid Wastes Management Center, Chongqing; 401117, China
Corresponding author:Wang, Ding-Yong(dywang@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:495-501
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Four typical coal-fired power plants in Chongqing, representing two different boiler types (circulating fluidized bed boiler and pulverized coal boiler), were chosen to investigate mercury emission characteristics through a mercury mass balance method by analyzing mercury contents in all input and output raw materials in order to accurately estimate mercury emissions. The results showed coal with mercury concentrations ranging (80.77&plusmn;6.39)-(266.83&plusmn;4.71) &mu;g&middot;kg<sup>-1</sup>could be a significant contributor of input mercury in these four studied power plants. Most mercury output from these power plants entered into solid waste with high proportion of mercury entering the fly ash in CFB plants and entering the fly ash and desulfurization gypsum in PC plants. Mercury removal efficiencies of studied plants were in the range of 72.89%-96.05%, and these efficiencies in CFB plants were higher than those in PC plants. The mercury emission factors for EF<inf>electricity</inf>and EF<inf>coal</inf>of these four plants were 4.66-29.47 &mu;g&middot;(kW&middot;h)<sup>-1</sup>and 8.55-71.77 mg&middot;t<sup>-1</sup>, respectively. The mercury emission was also calculated to be 6.13-429.17 g&middot;d<sup>-1</sup>. Mercury emissions from coal-fired power plants were associated with the content of mercury in coal, boiler type, generation load, pollution control equipment, and so on. To control the mercury emissions, more attention should be paid to improving the generation load, increasing the mercury removal efficiency of flue gas cleaning equipment, and strengthening the supervision of solid waste re-utilization. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Fossil fuel power plants
Controlled terms:Boilers - Cleaning - Coal - Coal ash - Coal fueled furnaces - Control equipment - Efficiency - Fire tube boilers - Fluidized bed process - Fluidized beds  - Fly ash - Gas emissions - Gypsum plants - Mercury (metal) - Mining - Pollution control - Pollution control equipment - Pulverized fuel - Pulverized fuel fired boilers - Removal  - Solid wastes - Surface morphology - Temperature measurement
Uncontrolled terms:Circulating fluidized bed boiler - Coal-fired power plant - Emission factors - Mercury emissions - Pulverized coal boilers
Classification code:502.1  Mine and Quarry Operations - 524  Solid Fuels - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 614  Steam Power Plants - 614.2  Steam Power Plant Equipment and Operation - 732.1  Control Equipment - 802.3  Chemical Operations - 913.1  Production Engineering - 944.6  Temperature Measurements
Numerical data indexing:Percentage 7.29e+01% to 9.60e+01%
DOI:10.13227/j.hjkx.201608055

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 32>

Accession number:20171003409540
Title:Effect of coupling process of wetting-drying cycles and seasonal temperature increasing on sediment nitrogen minerization in the water level fluctuating zone
Authors:Lin, Jun-Jie (1, 4); Liu, Dan (2); Zhang, Shuai (1); Yu, Zhi-Guo (3); He, Li-Ping (1); Yu, Shun-Hui (1)
Author affiliation:(1) Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Georges University, Chongqing; 404100, China; (2) Department of Agricultural and Forestry Science and Technology, Chongqing Three Gorges Vocation College, Chongqing; 404100, China; (3) College of Hydrometeorology, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (4) Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:555-562
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To reveal the effect of coupling process of wetting-drying and seasonal temperature on sediment nitrogen (N) minerization, surface sediment samples were collected from the water level fluctuating zone(WLFZ) of Pengxi River crossing two hydrological sections. The sediment samples were incubated under drying and submerging conditions at the controlled temperature. The result showed that NO<inf>3</inf><sup>-</sup>-N and sand% in the sediment of higher altitude of water level (170 m) were higher than those in low altitudes (150 and 160 m), whereas contents of TN, NH<inf>4</inf><sup>+</sup>-N and clay% and silt% in low altitudes were much higher. Generally, Net N mineralization rate and cumulation were lower in higher altitude of water level during the drying period and submerging period. The ammonification rate decreased rapidly at the initial stage of incubation (0-7 d), and then had no obvious change, and no significant differences among altitudes was observed. The nitrification rate at low altitude decreased with incubation time, while it had only a little change at higher altitude; The nitrification contributed a higher fraction of net N mineralization than ammonification. Net N mineralization rate and its cumulation were significantly higher in the drying period than in the submerging period, while net N mineralization rate decreased with incubation time at all altitudes. Net N mineralization cumulation tended to rise first and then declined at all altitudes of the drying period, whereas it was continuously decreasing at the low water level altitude during the submerging period. Net N nitrogen mineralization rate of the drying period was positively correlate to both the sediment organic matter content and its C&#8758;N ratio, while it showed a negative correlation in the submerging period(P&lt;0.001). Net N mineralization was sensitive to temperature increase (Q<inf>10</inf>&gt;1) in the drying period, while it was insensitive during the submerging period of low altitude (Q<inf>10</inf>&lt;1). Thus, the impact of temperature on Net N mineralization was relatively low in submerging period of winter and N was accumulated with low releasing rate. In contrast to winter, summer exhibited warmer and drying period, this two factors would lead to higher N mineralization rate and further induce the potential risk of eutrophication as N releasing into water body. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Drying
Controlled terms:Eutrophication - Mineralogy - Nitrification - Nitrogen - River pollution - Sediments - Temperature - Water levels - Wetting
Uncontrolled terms:Controlled temperature - Impact of temperatures - N mineralization rate - Nitrogen mineralization - Sediment organic matters - The drying period - The submerging period - Three Gorges
Classification code:453  Water Pollution - 482  Mineralogy - 483  Soil Mechanics and Foundations - 641.1  Thermodynamics - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Size 1.50e+02m, Size 1.60e+02m, Size 1.70e+02m
DOI:10.13227/j.hjkx.201607236

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 33>

Accession number:20171003416385
Title:Source apportionment of volatile organic compounds and health assessment of benzene series in northern suburb of nanjing in winter
Authors:Zhang, Yu-Xin (1); An, Jun-Lin (1); Lin, Xu (2); Wang, Jun-Xiu (1); Shi, Yuan-Zhe (1); Liu, Jing-Da (1)
Author affiliation:(1) Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Hangzhou Environmental Monitoring Center, Hangzhou; 310007, China
Corresponding author:An, Jun-Lin(junlinan@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:1-12
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Volatile organic compounds (VOCs) in the atmosphere of the north suburb of Nanjing in December 2015 were determined by GC5000 online gas chromatography, and the main composition and characteristics of VOCs were analyzed by using the PMF receptor model sources of VOCs parsing. The United States Environmental Protection Agency (EPA) human exposure analysis and evaluation method in the United States were used to evaluate Human health risk of benzene series. The results showed that there were 6 sources in the PMF mode. Natural gas leakage accounted for 32.05%, automobile exhaust accounted for 18.99%, solvent use 13.67%, industrial emissions 2 13.20%, gasoline volatile 11.72%, and industrial emissions 1 (chemical type) 10.36%. The high value areas of the emission source were in accordance with the location of pollution sources surrounding the observation point. The B/T ratio was 0.74, which was at a relatively high level.The noncarcinogenic risk hazard quotient value HQ at 06:00 reached the highest value. HQ risk values were within the safe range specified by EPA. HQ of each source was as follows: automobile exhaust emissions 20.67&times;10<sup>-2</sup>, solvent use 6.97&times;10<sup>-2</sup>, natural gas leakage 6.34&times;10<sup>-2</sup>. In the carcinogenic risk of benzene, automobile exhaust emissions was 4.11&times;10<sup>-6</sup>, and natural gas leakage was 1.09&times;10<sup>-6</sup>, both were higher than the EPA specified safety threshold. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Gas chromatography
Controlled terms:Automobiles - Benzene - Chromatography - Environmental Protection Agency - Fiber optic sensors - Gas emissions - Hazards - Health risks - Industrial emissions - Natural gas  - Organic compounds - Risk assessment - Volatile organic compounds
Uncontrolled terms:Automobile exhaust emissions - Carcinogenic risk - Hazard quotients - Natural gas leakage - Noncarcinogenic risk - Online gas chromatography - Source apportionment - United states environmental protection agencies
Classification code:451.1  Air Pollution Sources - 454.2  Environmental Impact and Protection - 461.7  Health Care - 522  Gas Fuels - 662.1  Automobiles - 741.1.2  Fiber Optics - 802.3  Chemical Operations - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 1.04e+01%, Percentage 1.17e+01%, Percentage 1.32e+01%, Percentage 1.37e+01%, Percentage 1.90e+01%, Percentage 3.20e+01%
DOI:10.13227/j.hjkx.201605170

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 34>

Accession number:20171003416404
Title:Distribution, sources and risk assessment of the PAHs in the surface sediments and water from the daye lake
Authors:Zhang, Jia-Quan (1); Hu, Tian-Peng (1, 2); Xing, Xin-Li (2); Zheng, Huang (2); Zhang, Li (1); Zhan, Chang-Lin (1); Liu, Hong-Xia (1); Xiao, Wen-Sheng (1); Qi, Shi-Hua (2)
Author affiliation:(1) School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi; 435003, China; (2) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:170-179
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:8 surface sediments and 8 water samples were collected from the Daye Lake in August 2015. The 16 kinds of EPA control polycyclic aromatic hydrocarbons (PAHs) were analyzed by GC-MS. The results showed that the PAHs concentrations of surface sediments and water ranged from 35.94 ng&middot;g<sup>-1</sup>to 2 032.73 ng&middot;g<sup>-1</sup>and from 27.94 ng&middot;L<sup>-1</sup>to 242.95 ng&middot;L<sup>-1</sup>, with average contents of 940.61 ng&middot;g<sup>-1</sup>and 107.77ng&middot;L<sup>-1</sup>, respectively. The distribution of PAHs in surface sediments indicated that the contents in the center samples were higher than those in the bank samples, but the water showed nearly the opposite tendency. The 4-5 rings high molecular weight PAHs were the main components in the surface sediments, and the 2, 4 and 5 rings PAHs were given priority in water. Compared with the other domestic and oversea lakes, the PAHs pollution of the Daye Lake was at a moderate level. Source apportionment showed that the PAHs in surface sediments and water from the Daye Lake came from the combustion source, HWM-PAHs were the dominant part of the PAHs in the sediment, reflecting the sediment PAHs pollution under the effects of mining and smelting over a long period; All monomer PAHs and total PAHs content in sediment did not exceed the ERM and FEL limiting values, showing that there was no particularly serious ecological risk caused by PAHs in the surface sediments from the Daye Lake; the incremental lifetime cancer risks assessment showed that the uptake risk of PAHs in Daye Lake water through the ingestion and dermal absorption were both in the acceptable range recommended by the USEPA, but all sites had higher risk than the acceptable risk level recommended by the Sweden environmental protection agency and Royal society. The pollution of seven carcinogenic PAHs needs prevention and control. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Lake pollution
Controlled terms:Aromatic hydrocarbons - Environmental Protection Agency - Health risks - Lakes - Pollution - Pollution control - Polycyclic aromatic hydrocarbons - Risk assessment - Sediments - Surficial sediments  - Water - Water absorption - Water pollution
Uncontrolled terms:Acceptable risk levels - Carcinogenic PAHs - Combustion sources - High molecular weight - Polycyclic aromatic hydrocarbons (PAHS) - Prevention and controls - Source apportionment - Surface sediments
Classification code:453  Water Pollution - 454.2  Environmental Impact and Protection - 461.7  Health Care - 483  Soil Mechanics and Foundations - 802.3  Chemical Operations - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Mass_Density 1.08e-07kg/m3, Mass_Density 2.79e-08kg/m3 to 2.43e-07kg/m3
DOI:10.13227/j.hjkx.201606058

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 35>

Accession number:20171003416386
Title:Size distribution and mixing state of black carbon aerosol in nanjing during a heavy winter pollution event
Authors:Jiang, Lei (1); Tang, Li-Li (1, 2); Pan, Liang-Bao (1, 2); Liu, Dan-Tong (3); Hua, Yan (1); Zhang, Yun-Jiang (1); Zhou, Hong-Cang (1); Cui, Yu-Hang (1)
Author affiliation:(1) Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), School of Environmental Science and Engineering, University of Information Science &amp; Technology, Nanjing; 210044, China; (2) Jiangsu Environmental Monitoring Center, Nanjing; 210036, China; (3) Centre for Atmospheric Science, Atmospheric and Environmental Sciences, University of Manchester, Manchester; M139PL, United Kingdom
Corresponding author:Tang, Li-Li(lily3258@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:13-21
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In December 2013, a lasting haze pollution event occurred in the Central and East regions of China. Here in this paper, using a single-particle soot photometer (SP2), we studied mass concentrations, mixing states, and size distributions of black carbon (BC) in this event. The results showed that BC mass concentration in Nanjing during the observation period was in the range of 1.01-14.05 &mu;g&middot;m<sup>-3</sup>with an average of 4.39 &mu;g&middot;m<sup>-3</sup>, showing the characteristics of double peaks for lighter pollution, andhigh in the nighttime and low in the daytime during heavier pollution. Using the relative coating thickness(D<inf>p</inf>/D<inf>c</inf>)to define mixing state of black carbon, diurnal variations were higher in early morning and noon when slightly polluted, and lower during rush hour, indicating the degree of BC ageing was deeper in the morning and afternoon, with fresher particles near the ground source emissions during rush hour. The relative coating thickness did not vary greatly throughout the day when heavily polluted, which was expected to be linked to regional pollutants and it also showed Gas-solid transformation under high relative humidity. The average mass and number size distribution had single peaking with the same BC volume-equivalent diameter in different degrees of pollution, with the peak diameter at 100 nm for the number distribution when heavily polluted, at 91 nm when slightly polluted, and at 210 nm for the mass distribution regardless of the degree of pollution. We could find regional differences of BC sources by comparing the observed research worldwide. This study has very important reference value for the in-depth understanding of BC pollution in Yangtze River Delta. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:River pollution
Controlled terms:Coatings - Fog - Mixing - Photometers - Photometry - Pollution - Size distribution - Soot - Thickness measurement
Uncontrolled terms:Black carbon - High relative humidities - In-depth understanding - Mixing state - Nanjing - Number size distribution - Regional differences - Single particle
Classification code:443.1  Atmospheric Properties - 453  Water Pollution - 802.3  Chemical Operations - 804  Chemical Products Generally - 813.2  Coating Materials - 922.2  Mathematical Statistics - 941.3  Optical Instruments - 941.4  Optical Variables Measurements - 943.2  Mechanical Variables Measurements
Numerical data indexing:Size 1.00e-07m, Size 2.10e-07m, Size 9.10e-08m
DOI:10.13227/j.hjkx.201605167

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 36>

Accession number:20172603860995
Title:Distribution Characteristics and Influencing Factors of Organophosphorus Pesticides in Typical Soil Environment of Jianghan Plain
Authors:Wang, Jian-Wei (1); Zhang, Cai-Xiang (1); Pan, Zhen-Zhen (2); Liao, Xiao-Ping (1); Liu, Yuan (1); L&uuml;, You (1); Tang, Mi (1)
Author affiliation:(1) State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan; 430074, China; (2) Geography and Tourism College, Chongqing Normal University, Chongqing; 400047, China
Corresponding author:Zhang, Cai-Xiang(caixiangzhang@yahoo.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1597-1605
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the distribution characteristics of organophosphorus pesticides (OPPs)in the soil of Jianghan plain,78 profile-soil samples from various depth and 7 surface-soil samples were collected in September,2015 in established groundwater monitoring field site, Jianghan plain. The OPPs concentrations were determined by gas chromatography with nitrogen-phosphorus detector(GC-NPD). The results showed that OPPs were widespread in our studied area. The OPPs concentrations of suface-soil samples ranged from 89.80 ng&middot;g<sup>-1</sup>to 193.85 ng&middot;g<sup>-1</sup>,with an average of 140.05 ng&middot;g<sup>-1</sup>, whereas the OPPs concentrations of profile-soil samples ranged from 19.81 ng&middot;g<sup>-1</sup>to 138.28 ng&middot;g<sup>-1</sup>,with an average of 40.99 ng&middot;g<sup>-1</sup>. The main ingredients of OPPs in surface and profile soil samples were methamidophos, omethoate, diazinon and quinalphos,and the residual amount of 10 kinds of OPPs had posed a threat to agricultural products according to the America soil pesticide residue limits standards. The horizontal distribution of OPPs concentration in profile soil followed the order of nearby river farm area&gt;nearby river area&gt;farm area, namely GS1-1&gt;GS4&gt;GS2&gt;GS3. while the vertical distribution mostly decreased at first and then increased with increasing depth. The distribution characteristics of OPPs were also influenced by many factors, such as application amount of OPPs, the adsorption and desorption actions of soil, vertical movement of groundwater, the terrain environment in the study area, and the concentration of soil organic matters. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Soil surveys
Controlled terms:Agricultural products - Gas chromatography - Groundwater - Nitrogen - Pesticides - Soil pollution - Soils
Uncontrolled terms:Distribution characteristics - Influencing factors - Jianghan plains - Organophos-phorus pesticides - Typical soils
Classification code:444.2  Groundwater - 483.1  Soils and Soil Mechanics - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 821.4  Agricultural Products
DOI:10.13227/j.hjkx.201609206

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 37>

Accession number:20172603860987
Title:Function of Polyphosphate Kinase Gene in Biological Phosphate Removal During the Wastewater Treatment Process
Authors:Nan, Ya-Ping (1); Zhou, Guo-Biao (1); Yuan, Lin-Jiang (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture &amp; Technology, Xi'an; 710055, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1529-1535
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study aimed to identify the function of polyphosphate kinase gene (ppk) in phosphorus removal. With the Red system, the target DNA with the homologous short arms was amplified in the plasmid pKD4. Then the target DNA was transformed into E. coli ATCC25922 which already had the suicide plasmid pKD46 by electroporation. The plasmid pCP20 was transformed into the recombinant strains to delete the kanamycin resistance gene. With the screening by negative resistance, together with verification using positive and negative primers, the construction of ppk gene deletion strain E. coli/ppk<sup>-</sup>Kan<sup>-</sup>was confirmed. The growth characteristics of both the wild-type strain and the mutant strain were determined, and the phosphate accumulating characteristics were compared when cultured in the phosphate luxuriant medium after induced in the phosphate lacking medium. Also the phosphate accumulating characteristics of the two strains were compared after cultured in the anaerobic and aerobic alternating conditions for 5 times. The results showed that the ppk deletion strain E. coli/ppk<sup>-</sup>Kan<sup>-</sup>was successfully constructed. There was no growth difference between the mutant strain and the wild-type strain. But in the first 4 hours of log phase, the mutant strain grew faster than the wild-type strain. And 8h later, when both strains were in stationary phase, the mutant strain grew slower than the wild type, indicating that ppk affected the growth of the bacteria. Cultured in the phosphate lacking medium and the phosphate luxuriant medium, the mutant strain's ability of phosphate accumulating didn't decrease in spite of having no ppk gene. After 5 times induction, the amounts of phosphorus in both strains were about 1%-2%. The phosphate amounts in the cells did not increase with increasing inducing times. Polyphosphate or PHB was detected neither at anaerobic phase nor at the aerobic phase. It indicated that the deletion of ppk did not affect the phosphorus removal in wastewater treatment process, and the ppk gene did not show the function of phosphorus removal. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Wastewater treatment
Controlled terms:Biological water treatment - DNA - Enzymes - Escherichia coli - Genes - Phosphorus
Uncontrolled terms:Gene deletion - Growth characteristic - Phosphate removal - Phosphorus removal - Polyphosphates - Recombinant strains - Wastewater treatment process - Wild-type strain
Classification code:445.1  Water Treatment Techniques - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.00e+00% to 2.00e+00%, Time 1.44e+04s, Time 2.88e+04s
DOI:10.13227/j.hjkx.201606164

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 38>

Accession number:20172603860980
Title:Influencing Factors on the Degradation of PFOS Through VUV-SO<inf>3</inf><sup>2-</sup>
Authors:Han, Hui-Li (1); Wang, Hong-Jie (1); Dong, Wen-Yi (1)
Author affiliation:(1) Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen; 518055, China
Corresponding author:Wang, Hong-Jie(whj1533@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1477-1482
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The objective of this experiment was to investigate the influence of SO<inf>3</inf><sup>2-</sup>dosage, pH value, initial perfluorooctane sulfonate(PFOS)concentration as well as coexisting substances on the degradation and defluorination of PFOS by VUV-SO<inf>3</inf><sup>2-</sup>process. The results indicated that the increase of SO<inf>3</inf><sup>2-</sup>dosage could lead to rise in the concentration of active species hydrated electron(e<inf>aq</inf><sup>-</sup>) and thus enhance the degradation and defluorination of PFOS. As the concentration of SO<inf>3</inf><sup>2-</sup>increased from 1 mmol&middot;L<sup>-1</sup>to 20 mmol&middot;L<sup>-1</sup>, the degradation and defluorination rates of PFOS increased from 45% and 40% to 97% and 63%, respectively. The degradation and defluorination of PFOS were also enhanced with the increment of the solution pH values, and the defluorination was more sensitive to the pH values. In addition, more PFOS was degraded with the increase of initial PFOS mass concentration, although the degradation and defluorination rates of PFOS were reduced. When the initial PFOS mass concentration changed from 1 mg&middot;L<sup>-1</sup>to 50 mg&middot;L<sup>-1</sup>, the degradation amount of PFOS after four hrs increased by about 50 times, probably due to the higher utilization proportion of e<inf>aq</inf><sup>-</sup>at high pollutants concentration. Last but not least, the influence of co-existing substances, Cl<sup>-</sup>and HCO<inf>3</inf><sup>-</sup>, on PFOS degradation could be neglected, whereas their effects on defluorination were observed. Defluorination of PFOS was enhanced with the increased Cl<sup>-</sup>concentration, however, increased first and then decreased with the increment of HCO<inf>3</inf><sup>-</sup>concentration. It was also found that the presence of humic acid(HA) lowered degradation as well as defluorination of PFOS owing to the blockage of effective UV light and trapping of active species for photochemical reaction. &copy; 2017, Science Press. All right reserved.
Number of references:22
Main heading:pH
Controlled terms:Hydration - Photochemical reactions
Uncontrolled terms:Hydrated electron - Influencing factors - Perfluorooctane sulfonates - Photochemical reduction - VUV-SO<inf>3</inf><sup>2-</sup>
Classification code:741.1  Light/Optics - 801.1  Chemistry, General
Numerical data indexing:Mass_Density 1.00e-03kg/m3 to 5.00e-02kg/m3, Molar_Concentration 1.00e+00mol/m3 to 2.00e+01mol/m3, Percentage 4.00e+01% to 9.70e+01%, Percentage 4.50e+01%, Percentage 6.30e+01%
DOI:10.13227/j.hjkx.201609204

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 39>

Accession number:20172603860992
Title:Assessment of Heavy Metal Pollution and Tracing Sources by Pb &amp; Sr Isotope in the Soil Profile of Woodland in Quanzhou
Authors:Sun, Jing-Wei (1, 2); Yu, Rui-Lian (1); Hu, Gong-Ren (1); Su, Guang-Ming (1); Wang, Xiao-Ming (3)
Author affiliation:(1) Department of Environmental Science and Engineering, Huaqiao University, Xiamen; 361021, China; (2) School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou; 362000, China; (3) Center of Analysis, Beijing Research Institute of Uranium Geology, Beijing; 100029, China
Corresponding author:Hu, Gong-Ren(grhu@hqu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1566-1575
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The contents of 8 heavy metal elements (Sr, Ni, Fe, Cr, Cu, Mn, Pb, Zn) and the lead &amp; strontium isotope composition of soil profile of woodland in Quanzhou city were analyzed by AAS and ICP-MS, respectively. A modified BCR four-step sequential extraction procedure was carried out to obtain the speciation fractionation of heavy metals in the soil profile from 4 stations. The results of the heavy metal elements and the speciation fractionation of heavy metals in the soil profile showed that the heavy metal pollution in the woodland in Quanzhou was relatively light, and the main pollution factor was Sr. The non-residue state of Pb was the highest, leading to the highest activity. The result of Nemero comprehensive pollution index showed that Sr in the depth of 0-60 cm was at heavy pollution level. The results of the RSP showed that the activity of Pb was the highest. The results of EF showed that Pb, Sr, Mn and Zn had exogenous sources. Factor analysis showed that the main sources of heavy metals were the compound pollution of agricultural activities, natural resources, and the vehicle exhaust. Composition of Pb isotopic ratios showed that, Pb in soil profile of woodland in Quanzhou was from vehicle exhaust and parent material. The contribution rates of the two sources in the soil profile were calculated by using the two-mixed model. The contribution rates of parent material and vehicle exhaust were 85.14%(62.53%-98.36%) and 14.86%(1.640%-37.47%) on average, respectively. Strontium isotope tracing results showed that the main sources of strontium were also vehicle exhaust and parent material. Coupling both Pb and Sr isotope ratios agreed with the above mentioned results. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Copper
Controlled terms:Factor analysis - Heavy metals - Isotopes - Lead - Manganese - Multivariant analysis - Pollution - Soils - Strontium - Vehicles  - Zinc
Uncontrolled terms:Enrichment factors - Source apportionment - Sr isotopes - Vertical profile - Woodland
Classification code:483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 543.2  Manganese and Alloys - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 549.2  Alkaline Earth Metals - 922  Statistical Methods - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.64e+00% to 3.75e+01%, Percentage 6.25e+01% to 9.84e+01%, Size 0.00e+00m to 6.00e-01m
DOI:10.13227/j.hjkx.201609131

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 40>

Accession number:20172603861001
Title:Effect of Application of Sewage Sludge Composts on Greenhouse Gas Emissions in Soil
Authors:Yang, Yu-Han (1); Yi, Jian-Ting (1); Zhang, Cheng (1, 2); Chen, Hong (1, 2); Mu, Zhi-Jian (1, 2)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China
Corresponding author:Zhang, Cheng(zhcheng@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1647-1653
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Effect of application of sewage sludge compost on the emission of greenhouse gas from soil was investigated by analyzing the dynamic characteristics and emission factor of CO<inf>2</inf>, CH<inf>4</inf>and N<inf>2</inf>O in soil after spiking two different composts (A: compost with biochar, B: compost without biochar) with varying fertilizing amount into soil. The results indicated that emissions of CO<inf>2</inf>and CH<inf>4</inf>mainly occurred in the plant growth period with low fertilizer amount of biomass charcoal compost reducing CO<inf>2</inf>emissions, and high application content increasing CO<inf>2</inf>emissions. CH<inf>4</inf>emission fluxes showed negative values, indicating that soil could adsorb CH<inf>4</inf>, and the adsorbing amount for control was significantly higher than those for other treatments (P&lt;0.01). The absorbing amount in treatment A increased with the fertilizing amount (P&lt;0.05). N<inf>2</inf>O emissions mainly occurred at the germination and seedling stages, and emission fluxes increased with the fertilizing amount (P&lt;0.01). N<inf>2</inf>O was considered as the main generated greenhouse gas during agricultural process with sludge compost, and its emission factor from sludge compost soil was 1.02%-1.90% (A compost) and 1.28%-2.93% (B compost), respectively. Biochar could significantly reduce the carbon emission, as the total greenhouse gas released from soil with biochar compost was 19.49% to 35.56% less than that in soil without biochar, which was more obvious for N<inf>2</inf>O emission reduction (compared with CH<inf>4</inf>mitigation). &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Composting
Controlled terms:Carbon - Carbon dioxide - Charcoal - Emission control - Gas emissions - Gases - Greenhouse effect - Greenhouse gases - Sewage sludge - Soils
Uncontrolled terms:Agricultural process - Bio chars - Carbon emissions - Compost products - Dynamic characteristics - Emission characteristics - Emission reduction - Sewage sludge compost
Classification code:451  Air Pollution - 452.2  Sewage Treatment - 483.1  Soils and Soil Mechanics - 524  Solid Fuels - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.95e+01% to 3.56e+01%
DOI:10.13227/j.hjkx.201606060

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 41>

Accession number:20172603860998
Title:Effects of Biochar on Surface Albedo and Soil Respiration in Suburban Agricultural Soil
Authors:Zhang, Yang-Yang (1); Hu, Xue-Yu (1); Zou, Juan (1); Zhang, Di (1); Chen, Wei (1); Wang, Xiang-Qian (1); Chen, Yao-Jun (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:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1622-1632
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Biochar application to soils is currently considered as a means of mitigating climate change by sequestering C, which withdraws CO<inf>2</inf>from the atmosphere and consequently influences the trend of global climate change. However, only a few studies have been done on surface albedo variations on farmland, it might be true that the application of biochar to soil could induce a radiative forcing by changing the surface albedo. Based on this background, this study aiming at the characterization of seasonal changes in albedo on the farmland both with plants and without plants, and its effect on soil temperature, soil moisture, soil respiration and soil organic carbon fractions. There were 3 major treatments in the experiment with 3 repetition of each major treatment, namely, CK (the control treatment), BC0.5 (biochar applied at 0.5 kg&middot;(m<sup>2</sup>&middot;a)<sup>-1</sup>) and BC4.5 (biochar applied at 4.5 kg&middot;(m<sup>2</sup>&middot;a)<sup>-1</sup>). Each major treatment contained 2 sub-treatments, which were crop cultivation (+) and non-cultivation (-). The experiment results showed that in the early stage of crop growth (maize seedling stage to jointing stage, wheat seedling stage to winter period), the surface albedo of BC4.5+ and BC0.5+ significantly decreased compared with CK+(P&lt;0.05). The biggest surface albedo decline rates of BC4.5+ and BC0.5+ in winter wheat season were 23.7%, 17.9% and 44.5%, 44.9% in summer maize season. The leaf area index of each treatment was remarkably correlated with the surface albedo. The shadow produced by the development of crop canopy structure would cover the change of surface color induced by the input of biochar. Under the condition of bare land, the surface albedo of biochar treatment was significantly decreased compared with the control treatment(P&lt;0.05). Compared with the control treatments, the soil CO<inf>2</inf>flux of the biochar treatments was significantly increased(P&lt;0.05). With the extension of time, the growth rate of soil CO<inf>2</inf>flux of biochar treatment was decreased gradually. The increase from BC4.5+ to CK+ was gradually reduced from 276.7% to 36.1%, and the increase of BC4.5- from to CK- was significantly reduced from 163.5% to 39.8%. The increase of soil CO<inf>2</inf>flux could be derived from the mineralization of the readily decomposed carbon fractions in the biochar-soil system. The decrease of surface albedo caused by the input of biochar had no direct effect on soil respiration, and the input of biochar could reduce the temperature sensitivity of soil respiration. This result could provide a foundation for the verification of the chemical and biological stability of biochar. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Soils
Controlled terms:Atmospheric radiation - Carbon dioxide - Chemical stability - Climate change - Crops - Cultivation - Farms - Organic carbon - Plants (botany) - Soil moisture  - Solar radiation
Uncontrolled terms:Agricultural soils - Bio chars - Chemical and biologicals - Global climate changes - Soil organic carbon - Soil respiration - Surface albedo - Temperature sensitivity
Classification code:443.1  Atmospheric Properties - 483.1  Soils and Soil Mechanics - 657.1  Solar Energy and Phenomena - 801  Chemistry - 804.1  Organic Compounds - 804.2  Inorganic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 1.64e+02% to 3.98e+01%, Percentage 1.79e+01%, Percentage 2.37e+01%, Percentage 2.77e+02% to 3.61e+01%, Percentage 4.45e+01%, Percentage 4.49e+01%
DOI:10.13227/j.hjkx.201609149

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 42>

Accession number:20172703864526
Title:Distributions, Sources and Pollution Assessment of Hg in Sediment of Douhe Reservoir in Tangshan City
Authors:Wu, Ting-Ting (1); Wang, Ming-Meng (2); Chen, Xu-Feng (3); Liu, Wen-Li (3); Li, Tai-Shan (3); Yan, Hai-Yu (4); He, Tian-Rong (1); Li, Zhong-Gen (4)
Author affiliation:(1) Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University, Guiyang; 550003, China; (2) College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan; 030024, China; (3) Tangshan Municipal Environmental Monitoring Center, Tangshan; 063000, China; (4) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China
Corresponding author:Li, Zhong-Gen(lizhonggen@vip.skleg.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:979-986
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sediment cores from Douhe reservoir in Tangshan City were sampled in August 2013, in order to evaluate the mercury (Hg) pollution degree and its possible sources. Agriculture soils surrounding the Douhe reservoir and sediments from an upstream reservoir (Daheiting) were also collected. Total mercury (THg), methylmercury (MeHg), dissolved mercury in pore water (DHg) and organic matter (OM) in sediment of Douhe reservoir were analyzed, while, only THg in the agriculture soils and upstream reservoir sediments was determined. Finally, the geoaccumulation index method was applied to evaluate the Hg pollution status in soils and reservoir sediments. The results showed that THg content in sediment of Douhe reservoir ranged from 19 to 97 ng&middot;g<sup>-1</sup>. dw, MeHg (dw) from 0.02 to 1.27 ng&middot;g<sup>-1</sup>, and the contents of both THg and MeHg were higher in the upper layers than the deeper layers, indicating that Hg in sediments was increasing in recent years by the exogenetic loadings. THg (dw) in soils offshore the Douhe reservoir, which is close to a large coal-fired power plant, averaged at 22 ng&middot;g<sup>-1</sup>. Among the three sediment cores of Douhe reservoir, the central point had the highest THg, followed by the western site, and the eastern site had the lowest THg. While, THg content (dw) in sediments of Daheiting reservoir was much higher, with a mean of 176 ng&middot;g<sup>-1</sup>. Combining all the above information, we concluded that Hg in Douhe reservoir was mainly derived from the Daheiting reservoir and the mercury atmospheric deposition from the nearby coal-fired power plant contributed a less content. THg and MeHg in the sediments of Douhe reservoir were positively correlated with OM, indicating that OM in sediments had good ability of adsorbing THg and MeHg, and also played an important role in Hg methylation. The geoaccumulation index (I<inf>geo</inf>) showed that the Hg pollution status deceased in this order: central of Daheting, Daba of Daheting, central of Douhe, western of Douhe, eastern of Douhe, soils surrounding Douhe. Central and western sites in Douhe belonged to moderate pollution and the eastern site belonged to slight pollution. While, sediments of Daheiting reservoir, affected by the iron ore mining activities, were in the moderate and strong pollution status. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Sediments
Controlled terms:Agriculture - Alkylation - Coal - Coal fueled furnaces - Fossil fuel power plants - Mercury (metal) - Meteorological problems - Petroleum reservoir evaluation - Pollution - Reservoirs (water)  - Sedimentation - Soils
Uncontrolled terms:Agriculture soils - Atmospheric depositions - Coal-fired power plant - Geo-accumulation index - Methyl mercury - Pollution assessment - Reservoir sediments - Total mercuries
Classification code:441.2  Reservoirs - 443.1  Atmospheric Properties - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 512.1.2  Petroleum Deposits : Development Operations - 524  Solid Fuels - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2  Chemical Reactions - 802.3  Chemical Operations - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.13227/j.hjkx.201609088

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 43>

Accession number:20172703864557
Title:Input and Distribution of Photosynthesized Carbon in Soil-Rice System Affected by Water Management and Nitrogen Fertilization
Authors:Wang, Ting-Ting (1, 2); Zhu, Zhen-Ke (1); Zhu, Han-Hua (1); Tang, Zhen-Zhu (1, 3); Pang, Jing (3); Li, Bao-Zhen (1); Su, Yi-Rong (1); Ge, Ti-Da (1); Wu, Jin-Shui (1)
Author affiliation:(1) Key Laboratory of Subtropical Agriculture Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Faculty of Resources and Environmental Science, Hubei University, Wuhan; 430062, China
Corresponding author:Zhu, Zhen-Ke(zhuzhenke@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1227-1234
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Fertilizer and water management are two key factors for rice growth. A better understanding of the carbon (C) cycling in paddy soil requires investigation into the input characteristics and distribution dynamics of photosynthesized carbon in rice-soil system. We grew rice (Zhongzao 39) in PVC pots and used the<sup>13</sup>C-CO<inf>2</inf>continuous labeling method to quantify the allocation of photosynthesized carbon in rice-soil system under two regimes (Drying-rewetting vs. continuous watering) and N fertilization (250 mg&middot;kg<sup>-1</sup>vs. no addition). The results showed that nitrogen fertilizer application increased rice shoot biomass and the amount of C and N, but had no significant influence on rice root biomass. Thus, nitrogen fertilizer application decreased rice biomass root/shoot ratio significantly. Drying-rewetting with N fertilizer treatment resulted in higher total C and N amount by 22% and 33%, respectively, in the shoot, and by 36% and 44%, respectively in the root than continuous watering with nitrogen fertilizer treatment. These results indicated that nitrogen fertilizer application promoted the growth of rice shoot. Nitrogen fertilizer application significantly increased the<sup>13</sup>C content in rice shoot by 32%-83% over the control without N addition. Nitrogen fertilizer application also increased the<sup>13</sup>C recovery in rice shoot by 6%-32%, but decreased that in the root by 18%-59%. Pertaining to water effect, drying-rewetting with N application increased the amount of<sup>13</sup>C in rice shoot and root. However, without N addition, the amount and the recovery of<sup>13</sup>C in shoot dropped by 10.3 mg&middot;pot<sup>-1</sup>and 12%, respectively, compared with the continuous watering treatment. The root, on the other hand, recorded increases in both the amount and the recovery of<sup>13</sup>C by 1.9 mg&middot;pot<sup>-1</sup>and 57%, respectively. Furthermore, the deposition of assimilated C into rhizosphere-soil increased by both the individual and the interactive effects of N fertilizer application and drying-rewetting treatment. Thus, combining N fertilizer and drying-rewetting water management led to more increased allocation and deposition of photosynthesized carbon in soil-rice system compared with combined continuous flooding and N application. This study was able to quantify the partitioning and allocation of rice photosynthesized carbon into different plant and soil pools under different water and N fertilizer treatments, and can serve as a useful guide for better water and nutrient management practices in paddy-rice production that can achieve both sustainable high yield and sequestration of more C within the paddy soil system. &copy; 2017, Science Press. All right reserved.
Number of references:42
Main heading:Nitrogen fertilizers
Controlled terms:Biomass - Carbon dioxide - Deposition - Drying - Ecology - Fertilizers - Nitrogen - Recovery - Soils - Water management
Uncontrolled terms:Drying-rewetting - Fertilizer applications - Interactive effect - Nitrogen fertilization - Nutrient management - Rhizodeposition - Rhizosphere soils - Rice
Classification code:454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.20e+01%, Percentage 1.80e+01% to 5.90e+01%, Percentage 2.20e+01%, Percentage 3.20e+01% to 8.30e+01%, Percentage 3.30e+01%, Percentage 3.60e+01%, Percentage 4.40e+01%, Percentage 5.70e+01%, Percentage 6.00e+00% to 3.20e+01%
DOI:10.13227/j.hjkx.201608068

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 44>

Accession number:20172703864519
Title:Characteristics of Spatial Distribution of Bacterial Aerosols Produced by Fountain
Authors:Zhang, Chong-Miao (1); Yuan, Lin (1); Xu, Peng-Cheng (1); Liu, Ke-Xin (1)
Author affiliation:(1) International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:911-917
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To illuminate the spatial distribution of bacterial aerosols produced by fountain, sprinkler test was conducted in this study. Escherichia coli NK5449 was used as the test strain, and bacterial aerosols were sampled by Anderson six-stage air sampler at different sites around the sprinkler. The concentration and particle size distribution of bacterial aerosols and the correlation between droplet diameter and bacterial aerosols concentration were analyzed. The results showed that the concentration of bacterial aerosols ranged from (38&plusmn;15) CFU&middot;m<sup>-3</sup>to (676&plusmn;92) CFU&middot;m<sup>-3</sup>in the space of 0.75 m to 1.75 m from the ground and 0.5 m to 3 m away from the sprinkler. The bacterial aerosol concentration decreased along with the increase of the height and the distance between the sampling site and the sprinkler, and had significant negative correlation with droplet diameter (P&lt;0.05). With the increase of the distance to sprinkler, the proportion of bacterial aerosol particles with size of larger than 4.7 &mu;m decreased at first and increased subsequently; while the proportion of bacterial aerosol particles with size between 2.1 and 4.7 &mu;m increased firstly and then decreased. The bacterial aerosol particles mainly existed in the part with size between 1.1 and 4.7 &mu;m at sampling sites more than 0.5 m away from the sprinkler. It indicated that bacterial aerosols with small size may be inhaled by people far away from the fountain, and the risk should not be ignored. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Spatial distribution
Controlled terms:Aerosols - Drops - Escherichia coli - Fountains - Particle size - Particle size analysis - Size distribution
Uncontrolled terms:Air samplers - Andersons - Bacterial aerosols - Droplet diameters - Negative correlation - Sampling site - Six stages
Classification code:921  Mathematics - 922.2  Mathematical Statistics - 951  Materials Science
Numerical data indexing:Size 1.10e-06m to 4.70e-06m, Size 2.10e-06m to 4.70e-06m, Size 4.70e-06m, Size 5.00e-01m3 to 3.00e+00m3, Size 5.00e-01m, Size 7.50e-01m to 1.75e+00m
DOI:10.13227/j.hjkx.201608102

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 45>

Accession number:20172703864539
Title:Biological Toxicity Evaluation of Domestic Wastewater Based on A<sup>2</sup>/O Treatment Processes Using a Battery of Bioassays
Authors:Zhang, Qiu-Ya (1); Ma, Xiao-Yan (1); Wang, Xiao-Chang (1); You, Meng (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Corresponding author:Wang, Xiao-Chang(xcwang@xauat.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1084-1092
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to accurately evaluate the comprehensive ecotoxicity of domestic wastewater and the toxicity reduction efficiency of different treatment processes, standardized assays focusing on Vibrio fischeri, SOS/umu test and yeast estrogen screen were applied. Simultaneously, male zebrafish was used to address the mode of action of endocrine disrupting effects of wastewater and reclaim water on aquatic life. Results of this study indicated that the influent was severely polluted: highly acute toxicity, genotoxicity and estrogenicity were observed. After the secondary biological treatment, the above toxicities were significantly reduced, making the water quality improved. However, the estrogencity of secondary effluent was detected at 1.89 ng&middot;L<sup>-1</sup>, which still posed potential risk on the aquatic life in receiving water. In addition, the up-regulation of estrogen receptor (esr1) and vitellogenin (vtg1) in the livers of zebrafish was observed after exposure to 2.5 times concentrated wastewaters, which demonstrated that wastewater modulates hormonal activities of aquatic life by disturbing target genes expression. Moreover, the slight down-regulation of esr1 was observed in the gonads. These observations reflect that the evaluation of biological toxic effect should be analyzed in different tissues or organs, so that more comprehensive information about the adverse effects of wastewaters on aquatic life can be obtained. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Biological water treatment
Controlled terms:Biological organs - Effluents - Electric batteries - Gene expression - Gene expression regulation - Toxicity - Wastewater treatment - Water pollution - Water quality
Uncontrolled terms:Domestic wastewater - Estrogenicity - Genotoxicities - Luminescent bacteria - Security level - Zebrafish
Classification code:445.1  Water Treatment Techniques - 445.2  Water Analysis - 452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 453  Water Pollution - 461  Bioengineering and Biology - 702.1  Electric Batteries
Numerical data indexing:Mass_Density 1.89e-09kg/m3
DOI:10.13227/j.hjkx.201607186

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 46>

Accession number:20172703864547
Title:Effects of Organic Loading Rate on Startup Performance of Anaerobic Digestion with Vinegar Residues
Authors:Dai, Xiao-Hu (1); Yu, Chun-Xiao (1); Li, Ning (1); Dong, Bin (1); Dai, Ling-Ling (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:Li, Ning(lining@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1144-1150
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Biochemical methane potential experiments were conducted to investigate the effects of organic loading rate on the performance of anaerobic digesters with vinegar residues. According to the comparisons of methane production and liquid phase compositions, as well as thermogravimetry, X-ray Diffraction and infrared spectroscopy analyses, the conclusions could be drawn that: (1) Lower organic loading rate was better to mitigate the accumulation of VFAs and pH decrease during the hydrolysis and acidification of organic matters, which consequently improved methane production. When the inoculum to substrate ratio was 1:1[organic loading rate of 1.78 g&middot;(L&middot;d)<sup>-1</sup>, pH=7.60], the cumulative methane production was the highest, reaching 2249.7 mL, and the performance of the digesters was stable. The VFAs content increased with the increase of the organic loading rate, leading to the suppression and further the stop of methane production. And when the inoculum to substrate ratio was 1:4 [organic loading rate of 7.12 g&middot;(L&middot;d)<sup>-1</sup>, pH=5.52], the simultaneous generation of acetate and lactic acids could be achieved at 8000 mg&middot;L<sup>-1</sup>and 2650 mg&middot;L<sup>-1</sup>, respectively. (2) As vinegar residues were short-range ordered with microcrystalline structure or mainly contained amorphous substances, they were more biodegradable than feedstocks such as corn stalk. During the anaerobic digestion processes, the degradation rates of lignin, cellulose and hemicellulose increased with the decrease of organic loading rate. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Loading
Controlled terms:Acetic acid - Anaerobic digestion - Cellulose - Degradation - Infrared spectroscopy - Methane - Substrates - Thermogravimetric analysis - Volatile fatty acids - X ray diffraction
Uncontrolled terms:Anaerobic digestion process - Biochemical methane potential - Cellulose and hemicellulose - Hydrolysis and acidifications - Inoculum to substrate ratios - Microcrystalline structures - Organic loading rates - Vinegar residues
Classification code:691.2  Materials Handling Methods - 801  Chemistry - 802.2  Chemical Reactions - 804.1  Organic Compounds - 811.3  Cellulose, Lignin and Derivatives
Numerical data indexing:Mass_Density 2.65e+00kg/m3, Mass_Density 8.00e+00kg/m3, Volume 2.25e-03m3
DOI:10.13227/j.hjkx.201607238

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 47>

Accession number:20172703864513
Title:Characteristics of Reactive VOCs Species During High Haze-Pollution Events in Suburban Area of Shanghai in Winter
Authors:Gao, Shuang (1); Zhang, Kun (1); Gao, Song (2); Xiu, Guang-Li (1); Cheng, Na (1); Pan, Yan (3)
Author affiliation:(1) State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources &amp; Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) Shanghai Environmental Monitoring Center, Shanghai; 200235, China; (3) Shanghai High School, Shanghai; 200231, China
Corresponding author:Xiu, Guang-Li(xiugl@ecust.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:855-866
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on the online measurements of VOCs of high pollution process at the university site in winter, VOCs' characteristics and species at different levels of haze pollution were analyzed. Fifty-five VOCs were detected during sampling. &sum;<inf>55</inf>VOCs concentrations ranged between 25.5&times;10<sup>-9</sup>-1320.3&times;10<sup>-9</sup>(avg&plusmn;SD, 240&times;10<sup>-9</sup>&plusmn;181&times;10<sup>-9</sup>). Toluene and xylene were the major pollutants during high pollution process, the concentrations of which were higher than those of industrial area. The university site shared a similar VOC composition with that of industrial area, which suggested that it might be influenced by the surrounding industries. VOCs species exhibited high concentrations in nighttime while low concentrations in daytime. The ozone concentrations were on the contrary. Aromatic hydrocarbons were predominant with a high percentage of contribution (70.0%) to OFP (ozone formation potential). Alkenes and alkynes were the second highest group (16.7%). The OFP of VOCs was 2078.2&times;10<sup>-9</sup>under the west-south wind direction, about 4 times higher than the value under other wind directions (505.8&times;10<sup>-9</sup>). Aromatic hydrocarbons exhibited a predominant contribution to OFP at different levels of haze pollution in this area, among which, Toluene and xylene contributed more than 50% to OFP. The newest version of EPA PMF model was used to identify the major source of VOCs and evaluate their contributions. Gasoline sources and vehicle exhaust, refinery and petroleum products, solvent use and organic synthetic materials were the identified VOC sources in the study area, contributing 33.1%, 31.5%, 30.5%, and 4.9%, respectively to the &sum;<inf>55</inf>VOCs concentrations. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Air pollution
Controlled terms:Air pollution control - Aromatic compounds - Aromatic hydrocarbons - Hydrocarbons - Organic solvents - Ozone - Pollution - Toluene - Volatile organic compounds - Xylene
Uncontrolled terms:Haze pollutions - Low concentrations - On-line measurement - Ozone concentration - Ozone formation potentials - Photochemical ozone - Synthetic materials - Typical species
Classification code:451  Air Pollution - 451.2  Air Pollution Control - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Percentage 1.67e+01%, Percentage 3.05e+01%, Percentage 3.15e+01%, Percentage 3.31e+01%, Percentage 4.90e+00%, Percentage 7.00e+01%
DOI:10.13227/j.hjkx.201609084

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 48>

Accession number:20171003416416
Title:Impact of biodegradable organic matter on the functional microbe activities in partial nitrification granules
Authors:Wang, Shu-Yong (1); Qian, Fei-Yue (1, 2, 3); Wang, Jian-Fang (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 Key Laboratory of Environmental Science and Engineering, 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:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:269-275
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To explore the short-term impact of biodegradable organic matter on the activities of different functional microbes in autotrophic partial nitrification granular sludge (PNG), the variations of both nitrogen transformation performance and dissolved oxygen (DO) uptake of PNG were investigated in this study, by carrying out successive batch tests with and without the organics stressing. The results showed that the higher the C/N ratio, the lower the specific nitrite accumulation rate of q(NO<inf>2</inf><sup>-</sup>-N). Meanwhile, the increase of heterotrophic bacteria (HeB) activities caused the fast DO uptake by PNG, which could effectively suppress nitrite oxidizing bacteria (NOB) with the low oxygen affinity. When inorganic substrate culture was employed in the following phase, both HeB and NOB showed low activities, with significant increase in q(NO<inf>2</inf><sup>-</sup>-N). In short, the adverse effects of biodegradable organic matter on the performance of PNG system were partially reversible, which could benefit to enhance the advantage of ammonium oxidizing bacteria (AOB) and improve the stability of partial nitrification reaction. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Bacteria
Controlled terms:Biogeochemistry - Biological materials - Dissolved oxygen - Electronic guidance systems - Granulation - Microorganisms - Nitration - Nitrification - Nitrogen oxides - Organic compounds
Uncontrolled terms:Ammonium oxidizing bacteria - Biodegradable organic matter - Functional microbe activities - Heterotrophic bacterias - Nitrite-oxidizing bacteria - Partial nitrification
Classification code:461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 481.2  Geochemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201607076

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 49>

Accession number:20171003416405
Title:Effects of ph and complexing agents on Sb(V) adsorption onto birnessite and ferrihydrite surface
Authors:Wang, Hua-Wei (1); Li, Xiao-Yue (1); Li, Wei-Hua (1); Sun, Ying-Jie (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao; 266033, China
Corresponding author:Sun, Ying-Jie(yjsun1971@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:180-187
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Effects of pH and complexing agents on Sb(V) adsorption onto birnessite and ferrihydrite surface were investigated. The results indicated that birnessite and ferrihydrite had strong ability to adsorb Sb(V). The removal efficiencies of Sb(V) by birnessite and ferrihydrite were dependent on the initial pH in solution. The removal efficiency of Sb(V) increased with the decrease of solution pH. At pH 5.0, the removal efficiencies, adsorption rate and adsorption capacity were better than those at pH 7.0 or 9.0. The adsorption process of Sb(V) on birnessite and ferrihydrite could be well described by the pseudo-second-order model. The Langmuir model best described the adsorption behavior of Sb(V) by birnessite and ferrihydrite at pH 5.0. The presence of citric acid or EDTA had significant effect on Sb(V) adsorption onto birnessite and ferrihydrite. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Adsorption
Controlled terms:Efficiency - pH - Removal
Uncontrolled terms:Adsorption behavior - Adsorption behaviour - Adsorption capacities - Birnessite - Complexing agents - Ferrihydrites - Pseudo-second order model - Removal efficiencies
Classification code:801.1  Chemistry, General - 802.3  Chemical Operations - 913.1  Production Engineering
DOI:10.13227/j.hjkx.201606165

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 50>

Accession number:20171003416403
Title:Pollution level, distribution characteristics and risk assessment of 32 PPCPs in surface water of luomahu lake
Authors:Zhang, Qin (1); Zhang, Sheng-Hu (1); Wang, Zhen (1); Guo, Min (1); Liu, Ji-Ning (1); Shi, Li-Li (1); Gu, Wen (1)
Author affiliation:(1) Key Laboratory of Pesticide Environmental Assessment and Pollution Control of National Environmental Protection, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing; 210042, China
Corresponding author:Liu, Ji-Ning(ljn@nies.org)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:162-169
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A total of 22 water samples collected from Luomahu Lake were determined using high performance liquid chromatography tandem mass spectrometry(HPLC-MS/MS) to evaluate the pollution level, spatial distribution and ecological risk of 32 PPCPs. 23 PPCPs were detected in surface water of Luomahu Lake and the total concentrations of 22 samples were 892-1 536 ng&middot;L<sup>-1</sup>. The concentration of norfloxacin (256-707 ng&middot;L<sup>-1</sup>) was the highest among the detected PPCPs, followed by ketoprofen (85-438 ng&middot;L<sup>-1</sup>), acesulfame (101-290 ng&middot;L<sup>-1</sup>) and naproxen (1.9-112 ng&middot;L<sup>-1</sup>). Spatial differences were found in concentrations of PPCPs in various sampling sites. Concentrations of PPCPs in northeast of Luomahu Lake were higher than those of southwest. Concentration of PPCPs in Fangtinghe River was high and that of Zhangshanzha River was relatively low. The risk assessment of 13 pharmaceutical PPCPs showed that risk quotients(RQs) of norfloxacin were 0.26-0.72, posing medial risk to aquatic ecosystem. Gemifibrozil posed low ecological risks with RQs&gt;0.01 in most sampling sites. RQs of other 11 PPCPs were less than 0.01, posing no ecological risks. The combined risk quotients of 12 PPCPs in water of Luomahu Lake were 0.29-0.75, indicating that those compounds posed an medial risk to aquatic ecosystem. Human health risk assessment showed that the RQs were less than one for 6 selected PPCPs, indicating that these compounds did not appear to pose an appreciable risk to human health by potential environmental exposure from drinking water. &copy; 2017, Science Press. All right reserved.
Number of references:48
Main heading:Risk assessment
Controlled terms:Aquatic ecosystems - Drug products - Ecology - Ecosystems - Health - Health risks - High performance liquid chromatography - Lake pollution - Lakes - Liquid chromatography  - Mass spectrometry - Pollution - Potable water - River pollution - Surface waters - Water - Water pollution
Uncontrolled terms:Distribution characteristics - Ecological risk assessment - Environmental exposure - High-performance liquid chromatography tandem mass spectrometries - Human health risk assessment - Pharmaceuticals and personal care products - Risk to human health - Spatial differences
Classification code:444  Water Resources - 444.1  Surface Water - 453  Water Pollution - 454.3  Ecology and Ecosystems - 461.6  Medicine and Pharmacology - 461.7  Health Care - 801  Chemistry - 914.1  Accidents and Accident Prevention
Numerical data indexing:Mass_Density 1.01e-07kg/m3 to 2.90e-07kg/m3, Mass_Density 1.90e-09kg/m3 to 1.12e-07kg/m3, Mass_Density 2.56e-07kg/m3 to 7.07e-07kg/m3, Mass_Density 8.50e-08kg/m3 to 4.38e-07kg/m3, Mass_Density 8.92e-07kg/m3 to 1.54e-06kg/m3
DOI:10.13227/j.hjkx.201606184

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 51>

Accession number:20171003416407
Title:Effect of dissolved humic acid on thyroid receptor antagonistic activity of zinc in aquatic environment
Authors:Ai, Yang (1); Kong, Dong-Dong (1); Yu, Chang (1); Shen, Yang (1); Li, Jian (1)
Author affiliation:(1) Engineering Research Center of Ground Water Pollution Control and Remediation, College of Water Science, Beijing Normal University, Beijing; 100875, China
Corresponding author:Li, Jian(lijian@bnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:195-200
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A rapid recombinant human thyroid (hTR) gene yeast bioassay was used to evaluate the effect of dissolved humic acid on thyroid receptor antagonistic activity of ZnCl<inf>2</inf>. The concentration of bio-available zinc after its reaction with dissolved humic acids was measured by anodic stripping voltammetry(ASV). Furthermore, the reaction mechanism of humic acid and zinc was investigated by three-dimensional excitation-emission matrix fluorescence spectroscopy (3DEEM). The results revealed that ZnCl<inf>2</inf>demonstrated strong thyroid receptor antagonistic activity, and the concentration inhibiting 20% of the maximum effect of ZnCl<inf>2</inf>was 1.70&times;10<sup>-5</sup>mol&middot;L<sup>-1</sup>. The thyroid receptor antagonistic activity of ZnCl<inf>2</inf>was reduced by 30%-50% after the reaction of dissolved humic acids. The results of ASV showed that the concentration of bio-available zinc was decreased after the reaction of dissolved humic acids, the result was similar to that of bioassay test. The thyroid receptor antagonistic activity of the mixed solution of humic acid and ZnCl<inf>2</inf>was increased after UV radiation treatment, however it was still lower than the antagonistic activity induced by ZnCl<inf>2</inf>. The results of 3DEEM showed that ZnCl<inf>2</inf>could reduce the fluorescence peak intensity of humic acid, which could intuitively characterize the interaction between humic acid and ZnCl<inf>2</inf>. The above results can provide basic data and theoretical support for zinc toxicity study in aquatic environment and the establishment of water quality criteria for znic. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Enzyme immobilization
Controlled terms:Bioassay - Biological materials - Dissolution - Fluorescence - Fluorescence spectroscopy - Organic acids - Voltammetry - Water analysis - Water quality - Zinc
Uncontrolled terms:3DEEM - Anodic stripping voltammetry - Antagonistic activity - Excitation-emission matrix fluorescence spectroscopies - Humic acid - Radiation treatments - Thyroid disrupting effects - Water quality criteria
Classification code:445.2  Water Analysis - 461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 546.3  Zinc and Alloys - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 801.4.1  Electrochemistry - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Percentage 2.00e+01%, Percentage 3.00e+01% to 5.00e+01%
DOI:10.13227/j.hjkx.201605211

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 52>

Accession number:20171003416419
Title:Effect of cadmium on biodegradation of nonylphenol by pseudomonas aeruginosa
Authors:Shi, Guang-Yu (1); Cheng, Yuan-Yuan (1); Shi, Wei-Lin (1)
Author affiliation:(1) College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China
Corresponding author:Shi, Wei-Lin(weilin-shi@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:294-300
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The influence of Cd on the degradation of nonylphenol (NP) by P.aeruginosa SH1 was investigated in this study. The investigation revealed that biomass of the strain was significantly declined with the increase of Cd<sup>2+</sup>concentration. The biomass was declined by 27.1% in the presence of 10 mg&middot;L<sup>-1</sup>Cd<sup>2+</sup>after 24 h. The addition of Cd<sup>2+</sup>had a great influence on adsorption of NP by the strain. As for the effect of living stain, adsorption by P.aeruginosa SH1 cells was stimulated at low concentrations of Cd<sup>2+</sup>(0.5 mg&middot;L<sup>-1</sup>), while inhibited at higher levels(&ge;5 mg&middot;L<sup>-1</sup>). As for inactivation of microbes, adsorption by cells was stimulated at higher concentrations, but was only slightly influenced at low levels. The results showed that the intracellular enzymes had much greater degradation rate than the living cells. Different concentrations of Cd<sup>2+</sup>had different effects on bacteria and intracellular enzyme degradation of NP separately. The degradation efficiency when using intracellular enzymes and bacteria was inhibited at higher levels of Cd<sup>2+</sup>and the intracellular enzyme inhibition was more significant. Degradation by cells was stimulated at low concentrations of Cd<sup>2+</sup>, but no significant impact was found on that by intracellular enzymes. The degradation process of NP by intracellular enzymes of the strain conformed to the first-order kinetic model. The highest reaction rate was achieved when the concentrations of Cd<sup>2+</sup>was 0.5 mg&middot;L<sup>-1</sup>and the half-life of this substrate was 5.5 h. However, the degradation process of NP by the strain did not conform to the first-order kinetic model. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Enzyme inhibition
Controlled terms:Adsorption - Bacteria - Biodegradation - Cells - Cytology - Degradation - Enzyme kinetics - Enzymes - Kinetic parameters - Kinetic theory  - Kinetics - Phenols - Pollution
Uncontrolled terms:Degradation efficiency - Degradation process - Different effects - First-order kinetic models - Intracellular enzyme - Low concentrations - Nonylphenols - Pseudomonas aeruginosa
Classification code:461.2  Biological Materials and Tissue Engineering - 461.8  Biotechnology - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 931  Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Mass_Density 5.00e-04kg/m3, Percentage 2.71e+01%, Time 1.98e+04s, Time 8.64e+04s
DOI:10.13227/j.hjkx.201607107

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 53>

Accession number:20171003409567
Title:Straw composts with composite inoculants and their effects on soil carbon and nitrogen contents and enzyme activity
Authors:Nie, Wen-Han (1, 2); Qi, Zhi-Ping (2, 4); Feng, Hai-Wei (2); Sun, Yu-Jing (3); Zhi, Yue-E (2); Zhang, Jin-Zhong (1); Zhang, Dan (2)
Author affiliation:(1) Key Laboratory of Eco-environments in Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Key Laboratory of Urban Agriculture (South), School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai; 200240, China; (3) Agro-technical Extension and Service Center of Shanyang Town, Jinshan District, Shanghai; 201518, China; (4) Sino-Singapore Thaisheng Agricultural Demonstration Farm, Shanghai; 202161, China
Corresponding author:Zhang, Jin-Zhong(jzhzhang@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:783-791
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The utilization of straw resources is of great significance to agricultural environmental protection and sustainable agricultural development. Based on the isolated 15 high-efficient cellulose degrading bacteria in the laboratory, the composite inoculants (JFB-1) which can effectively degrade crop straw were screened, and the effects of straw composts with the composite inoculants on soil carbon and nitrogen contents and enzyme activity were studied. The results showed that the composite inoculants could accelerate straw decomposition for 1-2 d during single fermentation period, and the organic matter contents in straw composts reached 403.5-515.1 g&middot;kg<sup>-1</sup>, while the ratio of carbon and nitrogen decreased from 10.53 to 15.30. The pot experiments found that the application effects of rice straw composts were generally better than those of corresponding asparagus straw composts. Compared with the control compost of rice straw, when the application amount of rice straw compost using the composite inoculants was 150 g&middot;kg<sup>-1</sup>, the contents of soil organic matter and total nitrogen increased by 33.5% and 7.3%, and soil urease and cellulase activities increased by 16.7% and 30.8%, respectively. Compared with no fertilization treatment, the application of straw composts could improve soil microbial community structure, and increase microbial diversity indices. When the application amount of rice straw compost using the composite inoculants was 100 g&middot;kg<sup>-1</sup>, the biomass of common Chinese cabbage cultivated for 30 d increased by 46.4% compared to the control compost of rice straw. These results indicated that the composite inoculants have great application potential in straw composts. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Composting
Controlled terms:Agriculture - Biodegradation - Biogeochemistry - Biological materials - Enzyme activity - Enzymes - Microorganisms - Nitrogen - Organic compounds - Soils
Uncontrolled terms:Cellulose degrading bacteria - Organic matter content - Soil enzyme activity - Soil microbial community - Soil microbial community structure - Soil nutrients - Straw composts - Sustainable agricultural development
Classification code:461  Bioengineering and Biology - 481.2  Geochemistry - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 1.67e+01%, Percentage 3.08e+01%, Percentage 3.35e+01%, Percentage 4.64e+01%, Percentage 7.30e+00%
DOI:10.13227/j.hjkx.201607140

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 54>

Accession number:20171003416402
Title:Comparison of nitrogen and phosphorus uptake and water purification ability of five submerged macrophytes
Authors:Jin, Shu-Quan (1); Zhou, Jin-Bo (1); Bao, Wei-Hong (2); Chen, Jun (3); Li, Dan-Dan (3); Li, Yang (1)
Author affiliation:(1) Ecology and Environment Institute, Ningbo Academy of Agricultural Science, Ningbo; 315040, China; (2) Environmental Protection Research and Design Institute of Ningbo, Ningbo; 315012, China; (3) Ningbo Yima Environmental Biotechnology Co., Ltd., Ningbo; 315000, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:156-161
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Uptake of nitrogen(N) and phosphorus(P) and their purification capacity for five native submerged macrophytes were investigated in laboratory simulated hydrostatic conditions, including Hydrilla verticillata, Vallisneria natans, Ceratophyllum demersum, Myriophyllum spicatum, Potamogeton maackianus. The results indicated that the moisture contents of different submerged macrophytes were almost the same before and after the test,with the range of 89.8%-92.0%. The net accumulated biomass changed from 1.52 g&middot;m<sup>-2</sup>to 12.92 g&middot;m<sup>-2</sup>among different submerged macrophytes, and the highest net accumulated biomass of Hydrilla verticillata was 8.5 times higher than the lowest plant of Potamogeton maackianus. The N and P contents of five submerged macrophytes ranged from 26.54 to 34.44g&middot;kg<sup>-1</sup>and from 2.54 to 4.01g&middot;kg<sup>-1</sup>, respectively, and the N and P contents of Ceratophyllum demersum were relatively high. Total N and P removal efficiency of different submerged macrophyte treatments had ranges of 63.8%-83.1% and 49.2%-70.8%, significantly higher than those of the CK treatment (39.9% and 36.9%), respectively, and the removal efficiency decreased in the order of Hydrilla verticillata&gt;Ceratophyllum demersum&gt;Vallisneria natans&gt;Myriophyllum spicatum&gt;Potamogeton maackianus. Total N and P removal efficiencies of different submerged macrophyte treatments were significantly correlated with net accumulated biomass, with correlation coefficients of 0.994 (P&lt;0.01) and 0.996 (P&lt;0.01). The contribution of direct N and P uptake to different submerged macrophytes had the ranges of 1.5%-13.3% and 2.2%-13.2%, and the synergism contribution (deducting self-purification capacity of water) of different submerged macrophytes ranged 22.5%-29.9% and 10.1%-20.6%, indicating that the synergistic effect of submerged macrophytes purification was much more significant than the direct uptake effect in the process of water purification. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Purification
Controlled terms:Biomass - Efficiency - Nitrogen - Phosphorus - Removal - Water treatment plants
Uncontrolled terms:Ceratophyllum demersum - Correlation coefficient - Hydrostatic conditions - Myriophyllum spicatum - Nitrogen and phosphorus - Submerged macrophytes - Submerged plants - Water purification
Classification code:445.1  Water Treatment Techniques - 804  Chemical Products Generally - 913.1  Production Engineering
Numerical data indexing:Percentage 1.01e+01% to 2.06e+01%, Percentage 1.50e+00% to 1.33e+01%, Percentage 2.20e+00% to 1.32e+01%, Percentage 2.25e+01% to 2.99e+01%, Percentage 3.69e+01%, Percentage 3.99e+01%, Percentage 4.92e+01% to 7.08e+01%, Percentage 6.38e+01% to 8.31e+01%, Percentage 8.98e+01% to 9.20e+01%
DOI:10.13227/j.hjkx.201606135

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 55>

Accession number:20172603860969
Title:Modeling of Water Quality Response to Land-use Patterns in Taizi River Basin Based on Partial Least Squares
Authors:Li, Lin-Lin (1, 2); Zhang, Yi-Zhang (2); Tang, Chang-Yuan (3); Zheng, Lei (1, 2); Meng, Wei (2); Lu, Shao-Yong (2); Dun, Yu (4)
Author affiliation:(1) College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Environmental Sciences and Engineering, Sun Yat-sen University, Guangzhou; 510275, China; (4) Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Science, Shijiazhuang; 050061, China
Corresponding author:Zhang, Yi-Zhang(zhangyz@craes.org.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1376-1383
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Land use change in river basin is one of the most significant factors that influence river water quality. Based on remote sensing images and river water quality data of Taizi River Basin, partial least squares (PLS) model was applied to explore the relationship between water quality and land use patterns at sub-watershed scale. In this study, PLS model was established by using the percentage of area of land use patterns from seven different sub-watersheds as the variables and the concentrations of four water quality parameters as the observations. The established model was further tested with the data from other sub-watersheds in Taizi River Basin. The results indicated that total nitrogen (TN) and nitrate (NO<inf>3</inf><sup>-</sup>) were significantly associated with land use types in Taizi River Basin with determination coefficient (R<sup>2</sup>) greater than 0.62. As for chloride (Cl<sup>-</sup>) and sulfate (SO<inf>4</inf><sup>2-</sup>), measured values and fitted values had a relatively low fitting precision (R<sup>2</sup>&lt;0.5), which meant land use pattern was not the main factor affecting the concentrations of Cl<sup>-</sup>and SO<inf>4</inf><sup>2-</sup>in river water. Meanwhile, river water quality had a strong correlation with the percentage of area of unused land at the sub-basin scale (influence coefficient &gt;0.24), although unused land area in the Taizi river basin was small. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Water resources
Controlled terms:Image reconstruction - Land use - Least squares approximations - Nitrates - Rivers - Water quality - Watersheds
Uncontrolled terms:Determination coefficients - Influence coefficient - Land use pattern - Model of water quality - Partial least square (PLS) - Partial least squares models - Taizi rivers - Water quality parameters
Classification code:403  Urban and Regional Planning and Development - 444  Water Resources - 444.1  Surface Water - 445.2  Water Analysis - 804.2  Inorganic Compounds - 921.6  Numerical Methods
DOI:10.13227/j.hjkx.201605109

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 56>

Accession number:20172603861007
Title:Bioaccumulation and Correlation of Heavy Metals in Human Hairs From Urban and Rural Areas of Chongqing
Authors:He, Ming-Jing (1, 2); Li, Qi (1); Wang, Deng-Xiang (1); Zhao, Jia-Yuan (1); Yang, Ting (1)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400716, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1697-1703
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In the present study, human hair samples were collected in Chongqing to detect the concentrations of heavy metals including Cd, Cu, Ni, Pb and Zn by flame atomic absorption spectrophotometry. Meanwhile, the relationship between the content of heavy metals and age, gender and smoking habits was also analyzed, and the potential sources of the heavy metals in human hair were understood through correlation analysis and principal component analysis. The results showed that the mean concentrations of Cd, Cu, Ni, Pb and Zn were 3.1, 24.3, 9.7, 42.8 and 209.6 &mu;g&middot;g<sup>-1</sup>, respectively in urban areas, while the mean contents were 0.9, 15.8, 5.6, 15.2 and 173.4 &mu;g&middot;g<sup>-1</sup>, respectively in rural area. The residents living in urban areas exhibited significantly higher concentrations than those in rural area, revealing the same heavy metal pattern with that in soils (t-test, P&lt;0.01). No obvious trend was observed between the contents of heavy metals and age, except that the contents of Cu and Zn were increasing with the growth of age. Significantly higher concentrations of Cd and Pb were both observed in male hair and smokers than those in female and non-smokers, respectively in urban and rural areas (P&lt;0.01). Similar correlation patterns among Cd, Cu, Ni and Pb were found both in urban and rural areas. According to principal component analysis, Cu, Ni and Pb contaminations had similar sources in urban areas, whereas Cd, Ni and Pb had similar sources in rural area. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Copper
Controlled terms:Biochemistry - Cadmium - Correlation methods - Heavy metals - Lead - Metal analysis - Nickel - Pollution - Principal component analysis - Rural areas  - Zinc
Uncontrolled terms:Chongqing - Correlation analysis - Correlation patterns - Flame atomic absorption spectrophotometry - Gender - Hair - Mean concentrations - Urban and rural areas
Classification code:531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2  Biochemistry - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201610030

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 57>

Accession number:20172603860985
Title:Effect of SRT on Stability of Yeast-SBR in Treating Oil-containing Wastewater
Authors:L&uuml;, Wen-Zhou (1); Zhang, Shu-Lin (1); Qiao, Yu-Xiang (1); Liu, Ying (1)
Author affiliation:(1) College of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo; 315211, China
Corresponding author:Liu, Ying(liuying1@nbu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1513-1519
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sludge retention time(SRT) is a crucial parameter to influence the stability of biological wastewater treatment systems. Especially, the effects of SRT on yeast-wastewater treatment remain unclear. In this study, mixtures of yeast strains were applied to treat oil-containing wastewater in sequencing batch reactors(SBR) and the effects of sludge retention time(SRT as 5, 10, 20, 40 d) on the removal efficiency of pollutants, contents and composition of extracellular polymeric substances(EPS), yeast cells settleability and yeast communities were investigated. The results showed that the recommended SRT was 5-10 d for the yeast-SBR system; Higher SRT led to decrease of COD removal rate and content of EPS; the tightly-bounded EPS was the major one which consisted of polysaccharides. SRT of 5-40 d had no significant effects on the SVI of yeast cells, however, longer SRT (&gt;20 d) resulted in the increase of mycelial cells and a tendency to produce the filamentous bulking. In the continuous operation of SBR, three extraneous yeast strains capable of utilizing or degrading oil were identified in the systems under the short and long SRT. To conclude, shorter SRT was favorable for the system stability in treating oil-containing wastewater by yeasts. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Wastewater treatment
Controlled terms:Activated sludge process - Batch reactors - Biological water treatment - Cells - Cytology - Polymers - System stability - Yeast
Uncontrolled terms:Biological waste water treatment - Continuous operation - Extracellular polymeric substances - Filamentous bulking - Mycelial cells - Removal efficiencies - Sequencing batch reactors - Sludge retention time
Classification code:445.1  Water Treatment Techniques - 452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 802.1  Chemical Plants and Equipment - 815.1  Polymeric Materials - 822.3  Food Products - 961  Systems Science
DOI:10.13227/j.hjkx.201607175

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 58>

Accession number:20172603860990
Title:Effect of Environment Adjustment Layers on Nitrogen Transformation in Anaerobic Bioreactor Landfills
Authors:He, Zheng-Kun (1); Song, Bo-Yu (2, 3); Zhu, Nan-Wen (1); Dong, Jun (3)
Author affiliation:(1) School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Environmental Protection Research Institute of Light Industry, Beijing; 100089, China; (3) Key Laboratory of Groundwater Resources and Environment, College of Environment and Resources, Jilin University, Changchun; 130021, China
Corresponding author:Dong, Jun(dongjun@jlu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1551-1557
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the perennial effect of environment adjustment layers on the interior environment and nitrogen transformation in anaerobic bioreactor landfills, three sets of simulated anaerobic bioreactor landfills and two kinds of environment adjustment layers of mineralized refuse with heavy calcium carbonate (R2) and mineralized refuse with natural zeolites (R3) were designed and established. The degradation and transformation of nitrogen in waste and leachate had been monitored for 390 days. The results showed that, the value orders of pH, alkalinity, oxidation reduction potential and moisture content (MS) were pH(R2)&gt;pH(R3)&gt;pH(R1), alkalinity (R2)&gt;alkalinity (R3)&gt;alkalinity (R1), Eh(R2)&lt;Eh(R3)&lt;Eh(R1) and MS(R3)&gt;MS(R2)&gt;MS(R1). In R1, R2 and R3, the degradation rates of total nitrogen, ammonia nitrogen, nitrate nitrogen in waste were 79.2%, 82.3% and 88.5%, 48.3%, 60.1% and 67.7%, 38.5%, 44.2% and 53.4%, respectively. Concentration comparison results of total nitrogen, ammonia nitrogen and nitrate nitrogen in leachate were TN(R3)&lt;TN(R2)&lt;TN(R1), NH<inf>4</inf><sup>+</sup>-N(R3)&lt;NH<inf>4</inf><sup>+</sup>-N(R1)&lt;NH<inf>4</inf><sup>+</sup>-N(R2) (Chinese Character)NO<inf>3</inf><sup>-</sup>-N(R3)&lt;NO<inf>3</inf><sup>-</sup>-N(R2)&lt;NO<inf>3</inf><sup>-</sup>-N(R1). Additionally, both of mineralized refuse with heavy calcium carbonate and mineralized refuse with natural zeolites could long-term adjust and optimize the interior environment of anaerobic bioreactor landfills for the degradation and conversion of nitrogen. Mineralized waste with natural zeolite could not only promote the degradation and transformation of nitrogen components in waste and leachate, but also control the accumulation of ammonia nitrogen through leachate recirculation. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Nitrogen
Controlled terms:Alkalinity - Ammonia - Bioconversion - Bioreactors - Calcium - Calcium carbonate - Degradation - Land fill - Leachate treatment - Nitrates  - pH - pH effects - Zeolites
Uncontrolled terms:Anaerobic bioreactors - Effect of environments - Environment adjustment layers - Heavy Calcium Carbonate - Interior environments - Nitrogen transformations - Oxidation reduction potential - Transformation
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 549.2  Alkaline Earth Metals - 801.1  Chemistry, General - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 1.07e+00yr, Percentage 3.85e+01%, Percentage 4.42e+01%, Percentage 4.83e+01%, Percentage 5.34e+01%, Percentage 6.01e+01%, Percentage 6.77e+01%, Percentage 7.92e+01%, Percentage 8.23e+01%, Percentage 8.85e+01%
DOI:10.13227/j.hjkx.201606046

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 59>

Accession number:20172603860966
Title:Catalytic Combustion of Soot Particulates over Rare Earth Pyrochlore Oxides Doped with Transition Metals
Authors:Li, Xi-Feng (1, 2); Sun, Yu-Qi (2); Wang, Zhong-Peng (2); Mu, Zong-Gang (2); Cui, Zhao-Jie (1)
Author affiliation:(1) School of Environmental Science and Engineering, Shandong University, Ji'nan; 250100, China; (2) College of Chemistry and Chemical Engineering, University of Ji'nan, Ji'nan; 250022, China
Corresponding author:Wang, Zhong-Peng(chm_wangzp@ujn.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1348-1356
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Catalytic combustion is an efficient way to remove soot particulates from automobile exhausts. A series of rare earth pyrochlore oxides La<inf>2</inf>Sn<inf>1.8</inf>TM<inf>0.2</inf>O<inf>7</inf>(TM=Sn, Mn, Fe, Co, Cu) were prepared with CTAB-assisted sol-gel method. The products were characterized by XRD,N<inf>2</inf>Adsorption-Desorption, SEM, FT-IR, H<inf>2</inf>-TPR and PL techniques. Their catalytic activity for soot oxidation was investigated by TPO under tight conditions in both O<inf>2</inf>and NO+O<inf>2</inf>atmospheres. After calcination at 900&#8451;, the as-synthesized oxides with pure pyrochlore phase displayed nanospheres with diameter of 30-60 nm and relatively large surface areas. The partial substitution of Sn with transition metals largely influenced the reduction behavior of pyrochlores especially on the low temperature range in H<inf>2</inf>-TPR profiles, which was due to the interactions between Sn and transition metals. The improved oxygen mobility might be derived from the structure defects induced by transition metals doping, which could be helpful in oxidation reactions. In comparison with uncatalyzed reactions, the La<inf>2</inf>Sn<inf>2</inf>O<inf>7</inf>catalyst exhibited modest catalytic activity for soot combustion, while transition metals incorporation further enhanced the activity and selectivity. The improved activity of transition metals doped samples was likely to be associated with the improved reducibility and increased surface oxygen vacancies on the pyrochlore oxides. The presence of NO in the gas phase significantly enhanced the soot oxidation activity, which was due to the promotion effect of NO<inf>2</inf>. Especially, the densities of active oxygen sites and turnover frequency (TOF) values of the catalysts, quantified by isothermal anaerobic titration with soot as a probe molecule, were used to explain the different soot combustion behaviors. Among the pyrochlore oxides, the Co-doped pyrochlore sample displayed the highest ignition activity and the largest intrinsic activity with TOF of 3.20&times;10<sup>-3</sup>s<sup>-1</sup>. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Catalyst activity
Controlled terms:Binary alloys - Catalysis - Catalyst selectivity - Catalysts - Catalytic oxidation - Combustion - Dust - Ionization of gases - Lanthanum alloys - Metals  - Nitrogen compounds - Oxidation - Oxygen - Oxygen vacancies - Rare earths - Sol-gel process - Sol-gels - Soot - Tin - Tin alloys  - Transition metal compounds - Transition metals - Vacancies
Uncontrolled terms:Catalytic combustion - Intrinsic activities - Oxidation reactions - Partial substitution - Pyrochlores - Soot particulates - Surface oxygen vacancies - Uncatalyzed reactions
Classification code:451.1  Air Pollution Sources - 531  Metallurgy and Metallography - 546.2  Tin and Alloys - 547.2  Rare Earth Metals - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 812.3  Glass - 933.1  Crystalline Solids
Numerical data indexing:Size 3.00e-08m to 6.00e-08m
DOI:10.13227/j.hjkx.201609228

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 60>

Accession number:20172603860962
Title:Pollution Characteristics of NH<inf>4</inf><sup>+</sup>,NO<inf>3</inf><sup>-</sup>,SO<inf>4</inf><sup>2-</sup>in PM<inf>2.5</inf>and Their Precursor Gases During 2015 in an Urban Area of Beijing
Authors:Ding, Meng-Meng (1); Zhou, Jian-Nan (1); Liu, Bao-Xian (1); Wang, Yan (1); Zhang, Bo-Tao (1); Shi, Ai-Jun (1); Yang, Dong-Yan (1); Chang, Miao (1)
Author affiliation:(1) Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology, Beijing Municipal Environmental Monitoring Center, Beijing; 100048, China
Corresponding author:Liu, Bao-Xian(liubaoxian28@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1307-1316
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Simultaneous measurements of precursor gases NH<inf>3</inf>,NO,NO<inf>2</inf>,SO<inf>2</inf>and the main water-soluble ions in PM<inf>2.5</inf>such as sulphate (SO<inf>4</inf><sup>2-</sup>),nitrate (NO<inf>3</inf><sup>-</sup>) and ammonium (NH<inf>4</inf><sup>+</sup>) (collectively called SNA)were carried out in the urban area of Beijing during 2015-01 to 2015-12,which obtained 325 groups of samples. PTFE membrane filters were used to collect particulate NH<inf>4</inf><sup>+</sup>, NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>, followed by the online instruments to collect precursor gases. The pollution characteristics of the precursor gases and SNA were analyzed and their correlation was studied. The mean concentrations of NH<inf>3</inf>, NO, NO<inf>2</inf>, SO<inf>2</inf>, NH<inf>4</inf><sup>+</sup>,NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>were 21.5, 17.7, 54.3, 14.2, 8.1, 13.5 and 12.7 &mu;g&middot;m<sup>-3</sup>respectively during the period of monitoring, and SNA accounted for 43.4% of PM<inf>2.5</inf>. The concentrations of SO<inf>2</inf>,NO<inf>x</inf>and SNA declined compared to 2014. The concentrations of NO,NO<inf>2</inf>and SO<inf>2</inf>were highest in winter and lowest in summer. The concentration of NH<inf>3</inf>was higher in summer and lower in autumn; The concentration and the percentage of NH<inf>4</inf><sup>+</sup>were stable during the four seasons,both the concentrations and the percentage of NO<inf>3</inf><sup>-</sup>were lowest in summer. The concentrations of SO<inf>4</inf><sup>2-</sup>was highest in winter and the percentage was lowest in summer. The ratio of ([NO<inf>3</inf><sup>-</sup>]+2[SO<inf>4</inf><sup>2-</sup>]) and NH<inf>4</inf><sup>+</sup>was 0.97 during the whole year, showing that anions mainly existed in the form of NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>. In summer, the ratio of [NO<inf>3</inf><sup>-</sup>]+2[SO<inf>4</inf><sup>2-</sup>] and [NH<inf>4</inf><sup>+</sup>] was slightly higher than 1.0, which was the reason why NO<inf>3</inf><sup>-</sup>was bound to Ca<sup>2+</sup>, Mg<sup>2+</sup>and Na<sup>+</sup>besides NH<inf>4</inf><sup>+</sup>. With the increase of pollution, the mass concentration of precursor gases and SNA increased dramatically, among which NO<inf>x</inf>increased most rapidly, and SO<inf>2</inf>decreased from severe pollution to serious pollution. The contribution rate of NH<inf>4</inf><sup>+</sup>was maintained at a relatively stable level. SO<inf>4</inf><sup>2-</sup>had a higher contribution when the pollution level was lower, whereas the concentration of NO<inf>3</inf><sup>-</sup>was higher than others and contributed most to PM<inf>2.5</inf>in heavy pollution. Heterogeneous transformation on the surface of particulate matter played a more important role in the formation of SO<inf>4</inf><sup>2-</sup>and NO<inf>3</inf><sup>-</sup>. The correlations between NO<inf>3</inf><sup>-</sup>, NO<inf>2</inf>and NO,NH<inf>4</inf><sup>+</sup>and NH<inf>3</inf>,SO<inf>4</inf><sup>2-</sup>and SO<inf>2</inf>were significant at the confidence level of 0.01. SO<inf>4</inf><sup>2-</sup>had negative correlation with SO<inf>2</inf>, and NO<inf>3</inf><sup>-</sup>had positive correlation with NO<inf>2</inf>. Compared with NH<inf>3</inf>, the NH<inf>4</inf><sup>+</sup>concentration was more obviously affected by acid gases NO<inf>2</inf>, SO<inf>2</inf>. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Gases
Controlled terms:Correlation methods - Nitrogen compounds - Nitrogen oxides - Pollution
Uncontrolled terms:Mass concentration - Mean concentrations - Negative correlation - On-line instruments - Particulate Matter - Positive correlations - Simultaneous measurement - Urban areas
Classification code:804.2  Inorganic Compounds - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 4.34e+01%
DOI:10.13227/j.hjkx.201607005

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 61>

Accession number:20172603860963
Title:Pollution Characteristics of PCDD/Fs in Ambient Air and Exposure Risk Assessment Around a Municipal Solid Waste Incinerator in Beijing
Authors:Qi, Li (1); Ren, Yue (1); Liu, Ai-Min (1); Huang, Ye-Ru (1); Zhao, Zhen (2); Wang, Jiang (2); Li, Hong (2)
Author affiliation:(1) State Environmental Protection Key Laboratory of Dioxin Pollution Control, National Research Center for Environmental Analysis and Measurement, Beijing; 100029, China; (2) Beijing Chaoyang District Environmental Protection Monitoring Station, Beijing; 100125, China
Corresponding author:Huang, Ye-Ru(yrhuang@cneac.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1317-1326
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Ambient air was sampled and analyzed around a municipal solid waste incinerator (MSWI) in Beijing from April 2014 to January 2015 to investigate the concentrations, profiles and seasonal variations of PCDD/Fs in the region using HRGC-HRMS technique. The mass concentrations and TEQ of 2,3,7,8-substituted PCDD/Fs in the air samples ranged from 8.9 to 140 pg&middot;m<sup>-3</sup>and from 0.11 to 1.8 pg&middot;m<sup>-3</sup>, respectively. The concentration values at 4 sampling sites in haze day in autumn and all 7 sampling sites in winter were higher than the ambient air standard of 0.6 pg&middot;m<sup>-3</sup>for dioxins regulated in Japan. 1,2,3,4,6,7,8-HpCDF and OCDD dominated PCDD/Fs in all the samples for all four seasons with average contribution fractions of 20.5% and 14.0%, respectively, while 2,3,4,7,8-PeCDF was the dominant congener contributing to TEQ (43.3%). The spatial distribution basically exhibited a trend that the concentrations at all sites were comparable and not related to the distances from the source. Seasonal variation showed obviously higher concentration in winter than the other three seasons, which may attribute to the high concentration of ambient particulate matter due to domestic heating and worse atmospheric dispersion that occurred in winter. The homologue and congener profiles of PCDD/Fs in the air samples differed from those of the flue gas emission from the MSWI, consistent with the principle component analysis results. Dioxin inhalation exposure dose estimation showed that the dioxin inhalation exposure risk of residents living in the studied area was at a relatively safe level [0.060-0.224 pg&middot;(kg&middot;d)<sup>-1</sup>]. However, the dioxin inhalation exposure risk in heavily polluted seasons still needs great concerns. &copy; 2017, Science Press. All right reserved.
Number of references:40
Main heading:Municipal solid waste
Controlled terms:Atmospheric movements - Organic pollutants - Principal component analysis - Refuse incinerators - Risk assessment - Risk perception - Solid wastes - Waste incineration
Uncontrolled terms:Ambient air - Inhalation exposure - Municipal solid waste incinerator - PCDD/Fs - Principle component analysis - Seasonal variation
Classification code:443.1  Atmospheric Properties - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 452.4  Industrial Wastes Treatment and Disposal - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.40e+01%, Percentage 2.05e+01%, Percentage 4.33e+01%
DOI:10.13227/j.hjkx.201608147

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 62>

Accession number:20172703864522
Title:Pollution Characteristics and Nitrification and Denitrification Potential of Superficial Sediments from Streams in an Urban-Rural Fringe
Authors:Qin, Ru-Bin (1); Li, Ru-Zhong (1); Gao, Su-Di (2); Zhang, Rui-Gang (3)
Author affiliation:(1) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei; 230009, China; (2) Collage of Civil and Environmental Engineering, Anhui Xinhua University, Hefei; 230088, China; (3) School of Civil Engineering, Hefei University of Technology, Hefei; 230009, China
Corresponding author:Li, Ru-Zhong(Lrz1970@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:936-945
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:From May 2015 to June 2016, seasonal sediment samples were collected from three headwater streams in the urban-rural fringe of Hefei, Chaohu Lake basin, China. The nitrogen pollution characteristics of sediments were preliminarily investigated for the three streams. Three metrics, that is, potential nitrification rate (PNR), areal nitrification rate (ANR) and rate of denitrification were quantitatively determined, and their spatial and temporal variations were discussed subsequently. Moreover, the relationship between PNR, ANR or denitrification rate and a list of environmental factors was discriminated by using partial least-squares regression analysis. Results showed that: (1) Guanzhenhe Distributary was the most polluted stream with a mean content of 4516.39 mg&middot;kg<sup>-1</sup>for TN, which was 2.56 and 1.36 times higher than those of Modian Stream and Taochong Stream, respectively. Similarly, the highest values for NH<inf>4</inf><sup>+</sup>-N and NO<inf>3</inf><sup>-</sup>-N emerged in Guanzhenhe Distributary while the lowest existed in Modian Stream. (2) There were distinct seasonal variations in PNR and ANR, namely, the maximum values emerged in summer, minimum in winter, and almost equivalent in spring and autumn. And the arrangement in order for PNR and ANR was Taochong Stream&gt;Modian Stream&gt;Guanzhenhe Distributary. (3) The mean rate of denitrification in Guanzhenhe Distributary was 10.59 mg&middot;(kg&middot;h)<sup>-1</sup>, which was 3.16 and 1.75 times higher than those in Modian Stream and Taochong Stream, respectively. In addition, both denitrification rate and denitrification activity in summer were higher than those in spring for the three streams. (4) According to the variable importance plot (F<inf>VIP</inf>), ANR, PNR and rate of denitrification were almost all significantly correlated with such physical and chemical factors as pH, OM, NH<inf>4</inf><sup>+</sup>-N, NO<inf>3</inf><sup>-</sup>-N, TN and TP in sediments for the three streams. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:River pollution
Controlled terms:Denitrification - Nitrification - Nitrogen - Pollution - Regression analysis - Rural areas - Sediments
Uncontrolled terms:Nitrification and denitrification - Nitrification rates - Nitrogen pollution - Partial least squares regression analysis - Potential nitrification - Spatial and temporal variation - Superficial sediments - Urban-rural fringes
Classification code:453  Water Pollution - 483  Soil Mechanics and Foundations - 802.2  Chemical Reactions - 804  Chemical Products Generally - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201609096

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 63>

Accession number:20172703864559
Title:Response of Soil Nitrifier and Denitrifier Community and Activity to Elevated Atmospheric CO<inf>2</inf>Concentration and Temperature
Authors:Liu, Yuan (1); Wang, Guang-Li (1); Li, Lian-Qing (2); Pan, Gen-Xing (2)
Author affiliation:(1) College of Life Science, Huaibei Normal University, Huaibei; 235000, China; (2) College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China
Corresponding author:Wang, Guang-Li(wanf-3344@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1245-1252
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Elevated atmospheric CO<inf>2</inf>concentration and temperature may affect nitrifiers and denitrifiers which are related to soil N turnover. A climate change experiment was conducted in the rice-wheat rotation ecosystem. This study was used to investigate effects of elevated CO<inf>2</inf>and temperature on soil microbial community structure, as well as abundance and activity of nitrifiers and denitrifiers. The results showed that no change in the abundance of ammonia-oxidizing bacteria (AOB) and denitrifier was observed at the tillering stage, however at the later stages, elevated CO<inf>2</inf>alone significantly increased the abundance of ammonia-oxidizing archaea (AOA) and denitrifier but there were no changes under CW treatment. The analysis of T-RFLP profiles showed that elevated CO<inf>2</inf>and temperature had no obvious effect on community structure of AOA, AOB or denitrifier, but altered diversity index (H') of AOA and denitrifier. Moreover, elevated CO<inf>2</inf>alone significantly increased nitrifying rate at the ripening stage. Elevated CO<inf>2</inf>and temperature did not result in significant change in denitrifying rate at each single stage. These results suggested that effects of elevated CO<inf>2</inf>and temperature on microbial community were different among the tillering, heading and ripening stages, and functional microorganism responded differently to multiple climate change treatments. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Atmospheric temperature
Controlled terms:Ammonia - Bacteria - Carbon dioxide - Climate change - Denitrification - Microorganisms - Nitrification - Social sciences - Soils
Uncontrolled terms:Ammonia oxidizing bacteria - Ammonia-oxidizing archaea - Atmospheric CO - Elevated temperature - Winter wheat
Classification code:443.1  Atmospheric Properties - 461.9  Biology - 483.1  Soils and Soil Mechanics - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 971  Social Sciences
DOI:10.13227/j.hjkx.201608139

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 64>

Accession number:20172703864552
Title:Pollution Characteristics of Chlorobenzenes in Organs of Fish from Typical Epidemic Areas of Schistosomiasis Prevalence
Authors:Li, Kun (1); Zhao, Gao-Feng (1); Zhou, Huai-Dong (1); Zhang, Pan-Wei (1); Liu, Qiao-Na (1); Zhao, Xiao-Hui (1); Li, Dong-Jiao (1); Ren, Min (1); Zhao, Dan-Dan (1)
Author affiliation:(1) China Institute of Water Resources and Hydro-power Research, Beijing; 100038, China
Corresponding author:Zhao, Gao-Feng(zhaogf@iwhr.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1182-1188
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sixty-eight fish samples were collected from typical epidemic areas of schistosomiasis prevalence. The contents of 12 CB congeners in fish samples were measured using GC/MS technique. The results indicated that 1,3-DIC, 1,4-DIC, 1,2-DIC and HCB were the most predominant CB congeners in the samples from the studying area. The source of HCB was PCP (pentachlorophenol), which was used to control the schistosomiasis prevalence, used in study area. And DIC came from the degradation of HCB and the articles of daily use. The geometric average of CBs in muscle ranged from 2731.50 to 7811.23 ng&middot;g<sup>-1</sup>lipid weight, while the summarized concentration of CBs in fish gonads, brains, kidneys, livers ranged from 2557.89 to 4640.05 ng&middot;g<sup>-1</sup>lipid weight, 2423.18 to 3329.61 ng&middot;g<sup>-1</sup>lipid weight, 1628.05 to 4667.76 ng&middot;g<sup>-1</sup>lipid weight and 704.92 to 1086.96 ng&middot;g<sup>-1</sup>lipid weight, respectively. When compared to other studies in China and other countries, the concentrations of CBs in these fish samples were at a relatively high level. &copy; 2017, Science Press. All right reserved.
Number of references:22
Main heading:Fish
Controlled terms:Electric circuit breakers - Epidemiology - Pollution
Uncontrolled terms:Daily use - Epidemic areas of schistosomiasis prevalence - Fish samples - Source - Study areas
Classification code:461.7  Health Care
DOI:10.13227/j.hjkx.201609094

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 65>

Accession number:20172703864514
Title:Assessment of PM<inf>2.5</inf>Pollution Mitigation due to Emission Reduction from Main Emission Sources in the Bejing-Tianjin-Hebei Region
Authors:Wu, Wen-Jing (1); Chang, Xing (1); Xing, Jia (1); Wang, Shu-Xiao (1, 2); Hao, Ji-Ming (1, 2)
Author affiliation:(1) State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing; 100084, China; (2) State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing; 100084, China
Corresponding author:Wang, Shu-Xiao(shxwang@tsinghua.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:867-875
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study chose two months (January and July) in 2012 which represent winter and summer respectively, to assess the effects of fine particle (PM<inf>2.5</inf>) pollution elimination due to emission control from different sectors in the Bejing-Tianjin-Hebei region by using CMAQ/2D-VBS modeling system. The results showed that, industrial emissions contributed most to PM<inf>2.5</inf>pollution in the Beijing-Tianjin-Hebei region, followed by domestic emissions, while the contribution of per ton emission reduced for industrial sectors subject to domestic sectors. The total contribution and contribution of per ton emission reduced for transportation and power plant were both at low level. Among industrial sectors, the iron, steel and metallurgical industry was the greatest contributor, followed by cement industry, industrial boiler, coking industry, lime and bricks industry and chemical industry. It was found that the contribution of each emission source had significant association with its primary PM<inf>2.5</inf>emission level. The control of NO<inf>x</inf>emissions would promote the formation of PM<inf>2.5</inf>, and atmospheric vertical diffusion effect was weak during wintertime in the Beijing-Tianjin-Hebei region. As a result, emission control of various sectors was universally more effective for PM<inf>2.5</inf>pollution mitigation in summer than in winter. Emission control in summer was significantly more effective for transportation, powerplant, cement industry, industrial boiler and lime and bricks industry. Due to considerable emissions in heating season, domestic emissions showed more contribution in winter. Agricultural sources showed greater contribution per emission reduction in winter by the reason of substantial emissions from straw open burning during this time. With respect to a certain reduction ratio of emission, future control strategies should pay more attention to industrial emissions, especially to the primary PM<inf>2.5</inf>emissions. In details, priorities should be given to NO<inf>x</inf>and SO<inf>2</inf>emission control for iron, steel and metallurgical industry, NO<inf>x</inf>emission control for cement industry and SO<inf>2</inf>and NMVOC emission control for coking industry. Besides, domestic emission control should also be taken into consideration, and it will be more effective in winter. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Industrial emissions
Controlled terms:Boiler control - Boilers - Brick - Cement industry - Cements - Chemical industry - Emission control - Gas emissions - Iron and steel industry - Lime  - Metallurgy - Nitrogen oxides - Pollution - Pollution control
Uncontrolled terms:Agricultural sources - Beijing-tianjin-hebei regions - CMAQ/2D-VBS - Control strategies - Emission reduction - Emissions reduction - Industrial boilers - Metallurgical industry
Classification code:412.1  Cement - 414.2  Brick Materials - 451.1  Air Pollution Sources - 451.2  Air Pollution Control - 531.1  Metallurgy - 545  Iron and Steel - 614  Steam Power Plants - 614.1  Steam Power Plant Design and Construction - 804.2  Inorganic Compounds - 805  Chemical Engineering, General
DOI:10.13227/j.hjkx.201607191

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 66>

Accession number:20172703864536
Title:Oxidation Destruction of Cu(CN)<inf>3</inf><sup>2-</sup>by Persulfate
Authors:Wang, Yun-Fei (1, 2); Li, Yi-Bing (1); Wang, Yan-Bin (2); Qi, Fan-Jing (1); Zhao, Kai (1); Tian, Shi-Chao (1); Guo, Tao (2); Guan, Wei (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:Zhao, Xu(zhaoxu@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1061-1066
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In recent years, cyanide contamination problem is becoming more and more serious. Cyanides widely occur in the wastewater from metallurgical industry and electroplating industry. The efficiency for cyanides removal of conventional physical and chemical methods is not very satisfactory. Therefore, it is urgent to develop highly efficient and environmental friendly methods for the removal of cyanides. As an environmental-friendly oxidant, potassium persulfate is widely used in the treatment of organic pollutants. The destruction of Cu(CN)<inf>3</inf><sup>2-</sup>was investigated by homogeneous K<inf>2</inf>S<inf>2</inf>O<inf>8</inf>under alkaline conditions, and the reaction mechanism was analyzed. The effects of the amount of K<inf>2</inf>S<inf>2</inf>O<inf>8</inf>and the ratio of Cu<sup>+</sup>/CN<sup>-</sup>on the degradation of CN<sup>-</sup>were studied. With the increase of K<inf>2</inf>S<inf>2</inf>O<inf>8</inf>dose, the rate of CN<sup>-</sup>oxidation was accelerated. The removal efficiency of CN<sup>-</sup>reached 89.6% after 60 min of reaction in the presence of 2 mmol&middot;L<sup>-1</sup>K<inf>2</inf>S<inf>2</inf>O<inf>8</inf>. Oxidation of CN<sup>-</sup>was accelerated with Cu<sup>+</sup>/CN<sup>-</sup>increasing from 2.0 to 5.0. Cu<sup>+</sup>was oxidized to Cu<sup>2+</sup>and copper oxide was formed during the reaction. The reactive radicals were analyzed using electron spin resonance and radical quenching experiments, and the results indicated that both radicals oxidation pathway and non-radical oxidation pathway were responsible for the removal of Cu(CN)<inf>3</inf><sup>2-</sup>by K<inf>2</inf>S<inf>2</inf>O<inf>8</inf>. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Copper compounds
Controlled terms:Alkalinity - Copper - Cyanides - Efficiency - Electroplating shops - Magnetic moments - Metallurgy - Organic pollutants - Oxidation - Potassium
Uncontrolled terms:Copper complexes - Electroplating industry - Environmental friendly methods - Environmental-friendly - Metallurgical industry - Potassium persulfate - Radical oxidation - Sulfate radicals
Classification code:402.1  Industrial and Agricultural Buildings - 531.1  Metallurgy - 544.1  Copper - 549.1  Alkali Metals - 701.2  Magnetism: Basic Concepts and Phenomena - 801.1  Chemistry, General - 802.2  Chemical Reactions - 804.1  Organic Compounds - 804.2  Inorganic Compounds - 913.1  Production Engineering
Numerical data indexing:Percentage 8.96e+01%, Time 3.60e+03s
DOI:10.13227/j.hjkx.201608014

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 67>

Accession number:20172703864553
Title:Effect of Nano Zeolite on Growth, Activity of Antioxidant Enzyme, and Chemical Fractions and Concentration of Cd in Chinese Cabbage
Authors:Qin, Yu-Li (1); Xiong, Shi-Juan (1); Xu, Wei-Hong (1); Zhao, Wan-Yi (1); Wang, Wei-Zhong (1); Chen, Yong-Qin (1); Chi, Sun-Lin (1); Chen, Xu-Gen (1); Zhang, Jin-Zhong (1); Xiong, Zhi-Ting (2); Wang, Zheng-Yin (1); Xie, De-Ti (1)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) College of Resources and Environmental Sciences, Wuhan University, Wuhan; 430079, China
Corresponding author:Xu, Wei-Hong(xuwei_hong@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1189-1200
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Pot experiment was carried out to investigate the influence of nano zeolite (NZ) and ordinary zeolite (OZ) on the growth, activities of antioxidant enzyme, Cd fraction and Cd concentration in two varieties of Chinese cabbage. The results showed that the activities of SOD, CAT and POD in the shoot and root of two varieties increased, and the dry weight of shoot and the total dry weight of Chinese cabbage increased by 4.5%-96.5% and 3.4%-88.4%, respectively. The application of zeolite effectively reduced the Cd concentration of shoot and root in the two varieties of Chinese cabbage, and the reduction range increased with the increase of the application amount of zeolite. Under the low Cd condition (1 mg&middot;kg<sup>-1</sup>Cd), the Cd concentration of edible parts (shoots) in SD4 variety and XJC3 variety decreased by 1.0%-75.0% and 19.5%-68.9% (except the Cd<inf>1</inf>+OZ<inf>5</inf>/OZ<inf>10</inf>processing), respectively. Under the high Cd condition (5 mg&middot;kg<sup>-1</sup>Cd), the Cd concentration of the edible parts (shoots) in SD4 variety and XJC3 variety decreased by 7.2%-53.2% (except Cd<inf>5</inf>+OZ<inf>10</inf>processing) and 0.7%-63.0%, respectively. The Cd concentrations of the edible parts (shoots) in tow varieties of Chinese cabbage in the nano zeolite treatments decreased by 10.5%-65.7% compared with the ordinary zeolite treatments. In Cd contaminated soils (1 mg&middot;kg<sup>-1</sup>and 5 mg&middot;kg<sup>-1</sup>Cd),) the total extraction amount of Cd in the edible parts (shoots) of SD4 variety reduced by 12.4%-68.8% and 13.2%-55.6% (except of Cd<inf>5</inf>+OZ<inf>5</inf>processing), and the total extraction amount of Cd in the edible parts (shoots) of XJC3 variety reduced by 9.4%-71.5% and 3.1%-38.7% (except of Cd<inf>1</inf>+OZ<inf>5</inf>processing), respectively. The application amount of nano zeolite (NZ) and ordinary zeolite (OZ) was more, the reduction range of the total extraction amount of Cd in the edible parts (shoots) of two varieties of Chinese cabbage was greater. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Pollution
Controlled terms:Antioxidants - Cadmium - Enzyme activity - Enzymes - Extraction - Soil pollution - Zeolites
Uncontrolled terms:Antioxidant enzyme - Cd concentrations - Cd-contaminated soils - Chemical fractions - Chinese cabbage - Dry weight - Pot experiment
Classification code: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
Numerical data indexing:Percentage 1.00e+00% to 7.50e+01%, Percentage 1.05e+01% to 6.57e+01%, Percentage 1.24e+01% to 6.88e+01%, Percentage 1.32e+01% to 5.56e+01%, Percentage 1.95e+01% to 6.89e+01%, Percentage 3.10e+00% to 3.87e+01%, Percentage 3.40e+00% to 8.84e+01%, Percentage 4.50e+00% to 9.65e+01%, Percentage 7.00e-01% to 6.30e+01%, Percentage 7.20e+00% to 5.32e+01%, Percentage 9.40e+00% to 7.15e+01%
DOI:10.13227/j.hjkx.201608110

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 68>

Accession number:20172703864520
Title:Removal of Volatile Sulfur Odor by the Biotrickling Filter
Authors:Ye, Jie-Xu (1); Miao, Xiao-Ping (2); Zhuge, Lei (1); Zhao, Xiang-Yu (1); Jiang, Ning-Xin (1); Zhang, Jing-Xiao (3); Chen, Dong-Zhi (1); Chen, Jian-Meng (1)
Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310014, China; (2) Environmental Science Research &amp; Design Institute of Zhejiang Province, Hangzhou; 310007, China; (3) Environmental Protection Bureau of Yuhuan County in Taizhou City, Yuhuan; 317600, China
Corresponding author:Chen, Dong-Zhi(cdz@zjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:918-923
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The biodegradation of gas-phase mixtrue of dimethyl sulfide (DMS) and 1-propanethiol (PT) was examined in a biotrickling filter (BTF), inoculated with a microbial consortium composed of activated sewage sludge, and pure strains of Alcaligenes sp. SY1 and Pseudomonas putida. S-1. BTF could be successfully started up within only 11 days when the inlet concentrations of DMS and PT were both 50 mg&middot;m<sup>-3</sup>and EBRT was 30 s, with 90% removal efficiency (RE) of DMS and 100% RE of PT. In the steady state, the maximum elimination capacities of DMS and PT were 8.7 g&middot;(m<sup>3</sup>&middot;h)<sup>-1</sup>and 12.4 g&middot;(m<sup>3</sup>&middot;h)<sup>-1</sup>, respectively. The presence of PT with a concentration up to 51 mg&middot;m<sup>-3</sup>showed an antagonistic removal pattern for DMS, but the opposite did not occur. Meanwhile, the BTF showed high efficiency in the biodegradation of H<inf>2</inf>S. When the concentration of H<inf>2</inf>S was as high as 230 mg&middot;m<sup>-3</sup>, the RE of H<inf>2</inf>S could reach 98%. However, H<inf>2</inf>S showed a declining effect on the removal of DMS when the concentration exceeded 115 mg&middot;m<sup>-3</sup>. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Biofilters
Controlled terms:Bacteria - Bandpass filters - Biodegradation - Efficiency - Filtration - Odor removal - Sewage sludge
Uncontrolled terms:1-propanethiol - Biotrickling filters - Dimethyl sulfide - H<inf>2</inf>S - Mixed wastes
Classification code:452.2  Sewage Treatment - 461.8  Biotechnology - 703.2  Electric Filters - 802.3  Chemical Operations - 913.1  Production Engineering
Numerical data indexing:Age 3.01e-02yr, Percentage 9.00e+01%, Percentage 9.80e+01%
DOI:10.13227/j.hjkx.201603055

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 69>

Accession number:20171003416426
Title:Mechanism of soil eco-functional stability under pyrene/cadmium simplex and combined pollution stress
Authors:Chen, Xin-Yao (1); Yang, Hui-Zi (1); Li, Min (2); Niu, Xiao-Cong (1); Su, Yu-Xuan (1); Zhang, Yuan (1)
Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Nanjing Institute of Geography &amp; Limnology, Chinese Acadamy of Sciences, Nanjing; 210008, China
Corresponding author:Zhang, Yuan(yuanzhang_1001@mail.usts.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:352-360
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In current scenario, the soil pollution has become very severe and its effects on agricultural and ecological security issues cannot be ignored as various contaminants are discharged into soil. Thus, the soil pollution is exigent and has to be solved. This research took soil resistance(Rt), resilience (Rl) and stability (Sb) as evaluation indexes for judging soil quality by exerting different concentration (concentration ratio) gradient of pyrene (PYR), cadmium (Cd) and pyrene/cadmium (PYR/Cd) combined pollutants. A sympathetic description was showed from the aspects of microbial activity, diversity and abundance of soil ecosystem,and the models were constructed to describe the dose-response relationship between PYR-Sb and Cd-Rt. The research showed that different types of pollutants had certain inhibition on soil DOC content. In Cd and PYR simplex pollution, soil microbial mean biomass and colony number decreased with increasing concentration of pollutants. In PYR/Cd combined pollution, the ratio of PYR and Cd had a negative correlation with the decreasing rate of DOC and resistance, meanwhile Cd had a prominent influence on the above-mentioned correlations, in other words, the soil with higher concentration of Cd had lower DOC decrease rate and resistance, and Cd would have dominant inhibition effect on microorganisms under PYR/Cd combined pollution. In addition, this study found the significant correlation of c<inf>PYR</inf>-Sb and c<inf>Cd</inf>-Rt, and built the binomial forecasting model to describe the dose-response relationship of c<inf>PYR</inf>-Sb and c<inf>Cd</inf>-Rt. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Soil pollution
Controlled terms:Antimony - Cadmium - Ecology - Microorganisms - Pollution - Pyrene - Soils
Uncontrolled terms:Dose response - Dose response relationships - Ecological security - Forecasting modeling - Microbial activities - Negative correlation - Soil microbes - Soil stability
Classification code:454.3  Ecology and Ecosystems - 461.9  Biology - 483.1  Soils and Soil Mechanics - 546.4  Antimony and Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201604157

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 70>

Accession number:20171003409528
Title:Variation characteristics and health risk assessment of BTEX in the atmosphere of northern suburb of Nanjing
Authors:Zhang, Yu-Xin (1); An, Jun-Lin (1); Wang, Jian-Yu (1); Wang, Jun-Xiu (1); Shi, Yuan-Zhe (1); Liu, Jing-Da (1); Liang, Jing-Shu (1)
Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science &amp; 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:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:453-460
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:BTEX concentrations were determined by GC5000 online gas chromatography in the atmosphere of the north suburb of Nanjing in March 2013 to February 2014, using the EPA human exposure analysis evaluation method for benzene series compounds of volatile organic compounds (VOCs) in health risk assessment. The results showed that the total amount of BTEX showed the variation characteristics of spring&gt;winter&gt;autumn&gt;summer. BTEX concentration was higher in the periods of 07:00-10:00 and 17:00-20:00, and the lowest was detected between 13:00-15:00; At the weekend, the concentration of BTEX was higher than on the working day. The sources of BTEX included traffic sources, industrial sources and solvent evaporation. The HQ of BTEX in all four seasons showed the order of benzene&gt;xylene&gt;ethylbenzene&gt;toluene, and the HQ risk values were within the safety range in all analysis periods. The distribution of R value was winter&gt;autumn&gt;spring&gt;summer, and R was higher than the safety threshold for all the analyses, indicating the existence of carcinogenic risk. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Risk assessment
Controlled terms:Benzene - Gas chromatography - Health - Health risks - Safety engineering - Volatile organic compounds
Uncontrolled terms:BTEX - Carcinogenic risk - Hazard quotients - Industrial sources - Nanjing - Online gas chromatography - Solvent evaporation - Variation characteristics
Classification code:461.6  Medicine and Pharmacology - 461.7  Health Care - 802.3  Chemical Operations - 804.1  Organic Compounds - 914  Safety Engineering - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201607108

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 71>

Accession number:20171003416398
Title:Seasonal succession characteristics of the Morphologically-based Functional Groups (MBFG) in deep-water reservoir
Authors:Yang, Yu (1, 2); Lu, Jin-Suo (1, 2); Zhang, Ying (1, 2)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture &amp; Technology, Xi'an; 710055, China; (2) State Key Laboratory Breeding Base of West Building Technology, Xi'an; 710055, China
Corresponding author:Lu, Jin-Suo(lujinsuo@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:121-128
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Morphologically-based functional groups (MBFG) is the basis for a simple way of distinguishing the phytoplankon to cluster species according to their similar morphological traits observed by optical microscope. In order to understand the application of morphologically-based functional groups (MBFG) in the research on phytoplankton community structure and variation of deep-water reservoir, as well as the succession characteristics of algae, the Jinpen Reservoir was studied from August 2011 to July 2013. Using morphologically-based functional groups (MBFG), the phytoplankton communities found in the reservoir were classified to functional groups, and the relations between the morphologically-based functional groups succession and environment cases were explored with redundancy analysis (RDA) method. The results suggested that five morphologically-based functional groups were found in the reservoir, namely II,IV,V,VI,VII; The succession of reservoir algal functional groups had seasonal characteristics, a variety of Morphologically-based functional groups coexisted in spring and summer,while reservoir algal functional groups were relatively simple in autumn and winter; meanwhile, the density of each morphologically-based functional group decreased with the increase of water depth among the environmental factors, morphologically-based functional groups IV and VI were respectively affected by temperature; the other water layers of the reservoir morphologically-based functional groups VI was significantly affected by TN content. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Reservoirs (water)
Controlled terms:Phytoplankton
Uncontrolled terms:Deep water reservoirs - Environmental factors - Morphological traits - Morphologically-based functional groups (MBFG) - Phytoplankton community - Redundancy analysis (RDA) - Related relationship - Seasonal characteristics
Classification code:441.2  Reservoirs - 471  Marine Science and Oceanography
DOI:10.13227/j.hjkx.201603096

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 72>

Accession number:20171003408643
Title:Sorption of p-nitrophenol by biochars of corncob prepared at different pyrolysis temperatures
Authors:Ma, Feng-Feng (1); Zhao, Bao-Wei (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China
Corresponding author:Zhao, Bao-Wei(zhbw2001@sina.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:837-844
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sorption of p-nitrophenol (PNP) on biochars prepared from pyrolysis of corncob in the temperature range of 200-600&#8451; (CC200-CC600) was investigated. Sorption mechanisms were discussed. Pyrolysis temperature showed a pronounced effect on properties of biochars. Decreases in molar H/C, O/C and (O+N)/C ratios were resulted from removal of H- and O-containing functional groups with increasing pyrolysis temperature, and produced biochars with low polarity and high aromaticity. The isotherms data were well described by the Freundlich model. Batch sorption experiments showed that the PNP sorption was strongly dependent on the properties of biochars. A linear relationship was observed between sorption parameters (n and K<inf>F</inf>) and properties of biochars such as molar elemental ratios [H/C, O/C, and (O+N)/C]. The sorption and partition fractions were quantified by isotherm separation method. PNP sorption on biochar produced at 200&#8451; was linear due to partition on uncarbonized organic matter in biochar, while PNP sorption on biochars produced at 300-600&#8451; was nonlinear and adsorption-dominant for all the biochars via &pi;-&pi; electron donor-acceptor interaction and pore-filling. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Sorption
Controlled terms:Isotherms - Phenols - Pyrolysis
Uncontrolled terms:Bio chars - Corncob - Electron donor acceptors - Linear relationships - p-Nitrophenol - Pyrolysis temperature - Separation methods - Sorption mechanism
Classification code:802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201608101

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 73>

Accession number:20171003409527
Title:Compositions and sources of summertime dicarboxylic acids and related SOA in PM<inf>2.5</inf>from Mt. Taishan
Authors:Meng, Jing-Jing (1, 2); Hou, Zhan-Fang (1, 2); Liu, Xiao-Di (1); Xing, Ji-Zhao (1)
Author affiliation:(1) School of Environment and Planning, Liaocheng University, Liaocheng; 252000, China; (2) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an; 710061, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:445-452
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To identify the compositions and sources of dicarboxylic acids and related SOA in Mt. Taishan, PM<inf>2.5</inf>samples were collected from July to August, 2004, and analyzed for dicarboxylic acids and related compounds, the tracers of biogenic secondary organic aerosol (SOA) (Isopene, &alpha;-/&beta;-Pinene and &beta;-caryophyllene SOA tracers), water-soluble organic carbon (WSOC) and inorganic ions. The results showed that total dicarboxylic acids were (376&plusmn;189) ng&middot;m<sup>-3</sup>, and C<inf>2</inf>was the most abundant dicarboxylic acid, followed by C<inf>3</inf>, C<inf>4</inf>and C<inf>9</inf>. The concentrations of diacids were more abundant than those in marine regions, but lower than those in urban and other mountainous areas, indicating that the atmosphere in Mt. Taishan was less influenced by anthropogenic pollution. C<inf>2</inf>/C<inf>4</inf>, C<inf>3</inf>/C<inf>4</inf>and F/M ratios indicated that diacids were mostly produced by more intensive photochemical oxidation. The relative abundance of C<inf>9</inf>to the total diacids, C<inf>9</inf>/C<inf>6</inf>and C<inf>9</inf>/Ph ratios were higher than those in urban, marine and mountainous regions, further suggesting that SOA in Mt. Taishan atmosphere were mostly derived from biogenic sources rather than anthropogenic sources. Compared to the budgets of model and correlation analysis, it suggested that diacids and related SOA in Mt. Taishan were mostly derived from photochemical oxidation of local biogenic sources. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Organic carbon
Controlled terms:Aerosols - Budget control - Carbon - Carbon inorganic compounds - Elementary particle sources - Marine pollution
Uncontrolled terms:Anthropogenic pollution - Anthropogenic sources - Correlation analysis - Dicarboxylic acid - Mt. Taishan - Photochemical oxidation - Secondary organic aerosols - Water-soluble organic carbon
Classification code:453  Water Pollution - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201607199

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 74>

Accession number:20171003409562
Title:Effects of Rhodopseudomonas palustris PSB06 on pepper rhizosphere microbial community structure
Authors:Luo, Lu-Yun (1, 2); Jin, De-Cai (3); Zuo, Hui (4); Zhang, Zhuo (2); Tan, Xin-Qiu (2); Zhang, De-Yong (2); Lu, Xiang-Yang (1); Liu, Yong (2)
Author affiliation:(1) College of Bioscience &amp; Biotechnology, Hunan Agricultural University, Changsha; 410128, China; (2) Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Institute of Hunan Plant Protection, Hunan Academy of Agricultural Science, Changsha; 410125, China; (3) Chinese Academy of Sciences Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (4) Hunan Biological and Electromechanical Polytechnic, Changsha; 410127, China
Corresponding author:Liu, Yong(haoasliu@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:735-742
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The use of biological pesticide can greatly reduce the soil pollution in the environment. Exploring the effect of biological pesticide on community diversity and distribution of pathogenic bacteria will provide theoretic basis for subsequent researches on biological pesticide micro-ecological control. In order to explore the microbial ecological mechanism of pepper phytophthora blight, this research compared the difference of microbial diversity between rhizosphere soil of infected and healthy plants, and the effects of Rhodopseudomonas palustris PSB06 on microbial diversities of plant rhizosphere soil were investigated using Illumina MiSeq sequencing technology. The results showed that there was less difference in the microbial diversity from the same soil between the seventh day and the fourteenth day. The microbial diversity of rhizosphere soil of healthy plants was higher than that of rhizosphere soil of infected plants. The soil sprayed with Rhodopseudomonas palustris PSB06 exhibited the highest diversity. Moreover, the abundance of Actinomycetes in the rhizosphere soil of healthy plants was higher than that of infected plants, and the highest abundance of Actinomycetes was observed in the soil sprayed with Rhodopseudomonas palustris PSB06. The microbial diversity between rhizosphere soil of infected and healthy plants was significantly different. Spraying Rhodopseudomonas palustris PSB06 could significantly alter the microbial community structure of the soil. It could also increase the diversity of microorganism and the abundance of Actinomycetes in the soil. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Soils
Controlled terms:Bacteria - Ecology - Microorganisms - Pesticides - Social sciences - Soil pollution
Uncontrolled terms:Ecological mechanisms - Microbial community structures - Microbial diversity - Phytophthora blights - Rhodopseudomonas palustris
Classification code:454.3  Ecology and Ecosystems - 461.9  Biology - 483.1  Soils and Soil Mechanics - 803  Chemical Agents and Basic Industrial Chemicals - 971  Social Sciences
DOI:10.13227/j.hjkx.201606059

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 75>

Accession number:20171003409532
Title:Variation analysis of daily PM<inf>2.5</inf>concentrations based on boosted regression tree: A case study in Changzhou
Authors:Ge, Yue (1); Wang, Ming-Xin (1); Sun, Xiang-Wu (1); Qi, Jin-Di (1)
Author affiliation:(1) College of Environmental &amp; Safety Engineering, Changzhou University, Changzhou; 213164, China
Corresponding author:Wang, Ming-Xin(wmxcau@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:485-494
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on hourly concentration data from six state-controlled air quality monitoring stations in urban area of Changzhou from December 2014 to November 2015, the seasonal variation of PM<inf>2.5</inf>pollution was analyzed, and the contributions of PM<inf>10</inf>, four kinds of gaseous pollutants and seven meteorological factors to daily changes of &rho;(PM<inf>2.5</inf>) were quantified by boosted regression tree (BRT). The results showed that: the seasonal differences of PM<inf>2.5</inf>pollution were significant, the pollution was serious in winter and the pollution duration was long, while the pollution was light in summer. The spatial distribution of &rho;(PM<inf>2.5</inf>) in four seasons was different, but the six monitoring stations showed similar trends in each season. Daily average &rho;(PM<inf>2.5</inf>) was simulated and verified by BRT. The correlation coefficient of the training data was 0.981, and the cross-validation correlation coefficient was 0.957. In addition, the mean deviation between the simulated values and the measured values was 1.80%, and the standardized mean error was 10.41%, which showed that the model fitted well. The contribution percentages of four kinds of impact types (PM<inf>10</inf>, gaseous pollutants, meteorological factors and regional transport and diffusion) to daily average &rho;(PM<inf>2.5</inf>) changes of four seasons were 23.4%, 28%, 36.2% and 12.6%, respectively. So, the most significant affecting factor was meteorological condition, followed by secondary formation, primary emission, and regional transport and diffusion. In the factors with contribution percentages of more than 5%, the daily average &rho;(PM<inf>2.5</inf>) was positively associated with PM<inf>10</inf>, relative humidity, CO and O<inf>3</inf>, and was negatively correlated with temperature, SO<inf>2</inf>and mixed layer high. In addition, the daily average &rho;(PM<inf>2.5</inf>) had complex relationships with atmospheric pressure and NO<inf>2</inf>. For regional transport and diffusion, the polluted air flow from southeast, west and north had a relatively great negative impact on PM<inf>2.5</inf>pollution of urban area in Changzhou. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Urban transportation
Controlled terms:Air quality - Atmospheric humidity - Atmospheric movements - Atmospheric pressure - Diffusion - Fog - Forestry - Pollution - Quality control - Regression analysis  - Sulfur dioxide - Trees (mathematics) - Verification
Uncontrolled terms:Boosted regression trees - Changzhou - Contribution percentage - Seasonal changes - Simulation
Classification code:432  Highway Transportation - 433  Railroad Transportation - 443.1  Atmospheric Properties - 451.2  Air Pollution Control - 721.1  Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 804.2  Inorganic Compounds - 913.3  Quality Assurance and Control - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.04e+01%, Percentage 1.26e+01%, Percentage 1.80e+00%, Percentage 2.34e+01%, Percentage 2.80e+01%, Percentage 3.62e+01%, Percentage 5.00e+00%
DOI:10.13227/j.hjkx.201607067

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 76>

Accession number:20171003409553
Title:Operational performance and microbial community structure in a completely mixed aeration system
Authors:Wang, Shuo (1, 2, 3); Xu, Qiao (1, 4); Zhang, Guang-Sheng (1, 2, 3); Li, Ji (1, 2, 3)
Author affiliation:(1) School of Environment and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) Jiangsu Key Laboratory of Anaerobic Biotechnology, Jiangnan University, Wuxi; 214122, China; (3) Jiangsu College of Water Treatment Technology and Material Collaborative Innovation Center, Suzhou; 215009, China; (4) Ningbo Municipal Drainage Co., Ltd., Ningbo; 315000, China
Corresponding author:Li, Ji(liji@jiangnan.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:665-671
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A completely mixed aeration system was introduced in domestic sewage treatment, and the simultaneous nitrification and denitrification process and microbial community structure were further investigated. The pilot-scale experimental results showed that the operation of the system was stable and the average chemical oxygen demand (COD), NH<inf>4</inf><sup>+</sup>-N and total nitrogen (TN) removal were 93.2%, 96.9% and 75.2%, respectively. The effluent COD, NH<inf>4</inf><sup>+</sup>-N and TN were better than the standard of level A stipulated by Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002) in the absence of external carbon source. The sludge derived from the system showed a significant denitrification capacity and the denitrification rate was 2.86 times higher than that in the wastewater treatment plant. In addition, the existence of aerobic denitrifying bacteria in the system was confirmed by the PCR amplification of genes encoding perplasmic nitrate reductases. The high-throughput sequencing results revealed that Zoogloea, Thauera and Dechloromonas were dominant in the completely mixed aeration system. &copy; 2017, Science Press. All right reserved.
Number of references:23
Main heading:Sewage aeration
Controlled terms:Aerobic bacteria - Bacteria - Carbon - Chemical oxygen demand - Denitrification - Effluent treatment - Effluents - Microorganisms - Nitrates - Nitrification  - Nitrogen removal - Polymerase chain reaction - Sewage - Sewage pumping plants - Sewage treatment - Social sciences - Throughput - Wastewater treatment - Water treatment plants
Uncontrolled terms:Aeration system - Aerobic denitrification - High-throughput sequencing - Microbial community structures - Municipal wastewater treatment plants - Nitrate reductase - Simultaneous nitrification and denitrification - Wastewater treatment plants
Classification code:445.1  Water Treatment Techniques - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 461  Bioengineering and Biology - 461.9  Biology - 801.2  Biochemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 971  Social Sciences
Numerical data indexing:Percentage 7.52e+01%, Percentage 9.32e+01%, Percentage 9.69e+01%
DOI:10.13227/j.hjkx.201607094

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 77>

Accession number:20171003416390
Title:Diurnal variations of concentration of porewater dissolved CH<inf>4</inf>and CO<inf>2</inf>in a brackish marsh dominated by cyperus malaccensis and phragmites australis during neap and spring tidal days in the minjiang river estuary
Authors:Tan, Li-Shan (1); Yang, Ping (1, 2); He, Lu-Lu (1); Huang, Jia-Fang (1, 2, 3); Hu, Zhi-Qiang (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:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:52-59
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Understanding of diurnal variation of soil porewater dissolved CO<inf>2</inf>and CH<inf>4</inf>concentration plays an important role in revealing carbon cycling in estuarine wetlands. During neap and spring tidal days in April and September 2010, the diurnal variations of soil porewater dissolved CO<inf>2</inf>and CH<inf>4</inf>concentrations and main impacting factors in a brackish marsh ecosystem dominated by two species of Cyperus malaccensis (brevifolius) and Phragmites australis (common reed) were determined in the ShanYutan in the Min River estuary, southeast China. The results showed that: &#9312; the soil porewater dissolved CH<inf>4</inf>concentration during the spring and neap tidal days in April and September ranged from 88.20 to 190.74, 53.42 to 141.24, 16.27 to 81.89 and 44.90 to 88.53 &mu;mol&middot;L<sup>-1</sup>, respectively. The mean of dissolved CH<inf>4</inf>concentration was higher at nighttime than at daytime during the spring and neap tidal days in April, but the mean of dissolved CH<inf>4</inf>concentration was higher at daytime than at nighttime during the spring and neap tidal tidal days in September. &#9313; the soil porewater dissolved CO<inf>2</inf>concentration during the spring and neap tidal days in September ranged from 19.33 to 40.1 &mu;mol&middot;L<sup>-1</sup>and 9.69 to 29.96 &mu;mol&middot;L<sup>-1</sup>, respectively, and the dissolved CO<inf>2</inf>concentration during daytime was lower than that at night; &#9314; the mean of dissolved CO<inf>2</inf>concentration was lower during the inundation period than in the exposed soil surface period, but the mean of dissolved CH<inf>4</inf>concentration was higher during the inundation period than in the exposed soil surface period. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Atmospheric composition
Controlled terms:Carbon dioxide - Dissolution - Estuaries - Floods - Soils - Wetlands
Uncontrolled terms:Dissolved carbon dioxide - Dissolved methane - Diurnal variation - Estuarine wetlands - Neap and spring tide day - Pore waters
Classification code:407.2  Waterways - 483.1  Soils and Soil Mechanics - 801  Chemistry - 802.3  Chemical Operations - 804.2  Inorganic Compounds
Numerical data indexing:Molar_Concentration 1.93e-02mol/m3 to 4.01e-02mol/m3, Molar_Concentration 4.49e-02mol/m3 to 8.85e-02mol/m3, Molar_Concentration 9.69e-03mol/m3 to 3.00e-02mol/m3
DOI:10.13227/j.hjkx.201606056

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 78>

Accession number:20172603860972
Title:Community Structure Characteristics of Eukaryotic Planktonic Algae in Liaohe River Through High-throughput Sequencing
Authors:Wang, Jing-Qi (1, 2, 3); Wang, Shu-Ping (2, 3); Zhang, Yuan (2, 3); Lin, Jia-Ning (2, 3); Gao, Xin (2, 3); Zang, Xiao-Miao (1, 2, 3); Zhao, Qian (2, 3)
Author affiliation:(1) College of the Environment, Liaoning University, Shenyang; 110036, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) Laboratory of Riverine Ecological Conservation &amp; Technology, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China
Corresponding author:Zhang, Yuan(zhangyuan@craes.org.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1403-1413
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Eukaryotic phytoplankton plays an important ecological function in river ecosystem. The 18S rRNA gene V4 variable region of the environmental samples in Liaohe river was sequenced by using 454 pyrosequencing technology. The reprehensive sequences of OTUs were annotated, and then the OTUs list was compared to the species list obtained by microscope observation. The phylogenetic tree was constructed based on the reprehensive sequences of OTUs and 18S rRNA genes of eukaryotic phytoplankton algae obtained from GenBank. The community structure characteristics of eukaryotic phytoplankton and its environmental impact indicators were further studied. In this study, we got 167 901 high-quality sequences of 18S rRNA gene V4 region. These sequences were annotated to 424 OTUs, including 134 eukaryotic algae. The results of the high-throughput sequencing showed that bacillariophyta and chlorophyta were the dominant groups of the total phyla. The high-throughput sequencing also revealed the presence of Charophyta, Cryptophyta, Haptophyta and Chrysophyceae which were not observed by optical microscope. The phylogeny analysis clustered the Cryptophyta and Pyrroptata at phylum level. The different genera of Cryptophyta and part of families or genera of Pyrroptata were clustered and distinguished by phylogeny analysis. The results of RDA showed that NH<inf>4</inf><sup>+</sup>-N, PO<inf>4</inf><sup>3</sup>-P and NO<inf>3</inf><sup>-</sup>were the most important environmental factors that affected the community structure. This study provided a new perspective to understand the diversity, community structure and influence factors of eukaryotic phytoplankton in Liaohe river. The study also indicated that high-throughput sequencing has great application potential in investigation of phytoplankton and the water environment quality assessment in Liaohe river. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Algae
Controlled terms:Biology - Ecology - Ecosystems - Environmental impact - Environmental technology - Genes - Phytoplankton - Rivers - RNA - Social sciences  - Throughput
Uncontrolled terms:18s rRNA - Community structures - Diversity - Ecological functions - Environmental factors - Environmental sample - High-quality sequences - High-throughput sequencing
Classification code:454  Environmental Engineering - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 971  Social Sciences
DOI:10.13227/j.hjkx.201609133

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 79>

Accession number:20172603860991
Title:Characteristics of Anaerobic Methane Removal Coupled to Fe(III) Reduction in Aged Refuse
Authors:Wang, Li-Li (1, 2); He, Ting (1, 2); Long, Yan (1, 2); Liu, Chang-Bao (1, 2)
Author affiliation:(1) School of Environment, Jinan University, Guangzhou; 510632, China; (2) Key Laboratory of Water/Soil Toxic Pollutants Control and Bioremediation of Guangdong Higher Education Institutes, Jinan University, Guangzhou; 510632, China
Corresponding author:Long, Yan(Tlongyan@jnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1558-1565
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Landfills are the third largest iron reservoir and one of the largest sources of methane release. Iron, as a kind of transition metal, plays a particularly important role in environmental biogeochemistry and is closely linked to the biogeochemical cycle of C, S and N. The aged refuse could be utilized as bio-cover material to improve the removal of contaminants. Therefore, this work investigated the effect of iron reduction on anaerobic removal of methane, and the interactions of ferric iron with nitrate and sulfate in the aged refuse. The columns were operated as landfill bio-covers and recirculated leachate with addition of FeCl<inf>3</inf>solution. In the experiment, three columns were used, two of them were used as controls (named as B1 and B3), B1 was fed with leachate and CH<inf>4</inf>, whereas B3 was only recirculated with leachate adding FeCl<inf>3</inf>. The treatment B2 was fed with the above two substrates. During the operation of columns, the contents of CH<inf>4</inf>, CO<inf>2</inf>and N<inf>2</inf>in the gas, and the concentrations of NO<inf>3</inf><sup>-</sup>, NO<inf>2</inf><sup>-</sup>, NH<inf>4</inf><sup>+</sup>, SO<inf>4</inf><sup>2-</sup>, Fe(III) and Fe(II) in the leachate and refuse were respectively determined. The results showed that adding ferric iron obviously enhanced the removal of methane in anaerobic aged refuse, the decrease of methane content with time obeyed zero-order kinetic, and the rate of methane removal(denoted as CH<inf>4</inf>/aged refuse)reached 1.28 mmol&middot;(kg&middot;d)<sup>-1</sup>. In the anaerobic condition, methane could improve the reduction of Fe(III) to dissolved, active and bioavailable Fe(II). The active Fe(II) probably coupled to the transformation of NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>, and thus accelerated the removal of NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Methane
Controlled terms:Biogeochemistry - Couplings - Iron - Land fill - Leachate treatment - Nitrogen compounds
Uncontrolled terms:Aged refuse - Anaerobic conditions - Anaerobic methane - Biogeochemical cycle - Cover materials - Environmental biogeochemistries - Fe reductions - Zero order kinetics
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 481.2  Geochemistry - 545.1  Iron - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201606032

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 80>

Accession number:20172603860975
Title:Residues of Organochlorine Pesticides (OCPs) in Water and Sediments from Nansha Mangrove Wetland
Authors:Ding, Yang (1); Huang, Huan-Fang (1); Li, Hui (1); Luo, Jie (1, 2); Zheng, Huang (1); Sun, Yan (1); Yang, Dan (3); Zhang, Yuan (1); Qi, Shi-Hua (1)
Author affiliation:(1) State Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China; (2) Guangdong Hydrogeology Battalion, Guangzhou; 510510, China; (3) Faculty of Engineering, China University of Geosciences, Wuhan; 430074, China
Corresponding author:Qi, Shi-Hua(shihuaqi@cug.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1431-1441
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Mangrove wetland plays an important role in coastal environment. A total of 10 surface water samples and 7 surface sediments samples were collected in March, 2015 from Nansha mangrove wetland, and 8 compounds of organochlorine pesticides (OCPs) were determined by GC-ECD to investigate residues level, source, and ecological risk of these compounds in the study region. The result showed concentrations of OCPs in water ranged from 1.89 to 90.19 ng&middot;L<sup>-1</sup>(mean 30.16 ng&middot;L<sup>-1</sup>), and concentrations of OCPs in sediments varied from 3.10 to 16.02 ng&middot;g<sup>-1</sup>(average 8.58 ng&middot;g<sup>-1</sup>). Compared with other estuaries and harbors around the world, concentrations of OCPs in this study stayed at a median pollution level. The mean values of distribution coefficient of HCHs and DDTs between water and sediments were 857 and 368, respectively. Sediments in some parts of the area, whose distribution coefficient was relatively high, may bring water the secondary pollution. Source analysis indicated that HCHs mainly originated from the application of Lindane, and DDTs originated from mixed sources of dicofol and technical DDT. Compared with OCPs in water, OCPs in sediments might contain more historical residual components. OCPs in water had light ecological risk, but OCPs in sediments posed a potential high risk to mangrove ecosystem. &copy; 2017, Science Press. All right reserved.
Number of references:50
Main heading:Water pollution
Controlled terms:Ecology - Ecosystems - Pesticides - Pollution - River pollution - Sediments - Water - Wetlands
Uncontrolled terms:Coastal environments - Distribution coefficient - Mangrove - Mangrove ecosystems - Nansha - Organochlorine pesticides - Residual components - Secondary pollution
Classification code:453  Water Pollution - 454.3  Ecology and Ecosystems - 483  Soil Mechanics and Foundations - 803  Chemical Agents and Basic Industrial Chemicals
Numerical data indexing:Mass_Density 1.89e-09kg/m3 to 9.02e-08kg/m3, Mass_Density 3.02e-08kg/m3
DOI:10.13227/j.hjkx.201609019

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 81>

Accession number:20172603861002
Title:Effect of Nano Zeolites on pH, CEC in Soil and Cd Fractions in Plant and Soil at Different Cadmium Levels
Authors:Chi, Sun-Lin (1); Xu, Wei-Hong (1); Xiong, Shi-Juan (1); Wang, Wei-Zhong (1); Qin, Yu-Li (1); Zhao, Wan-Yi (1); Zhang, Chun-Lai (1); Li, Yan-Hua (1); Li, Tao (1); Zhang, Jin-Zhong (1); Xiong, Zhi-Ting (2); Wang, Zheng-Yin (1); Xie, De-Ti (1)
Author affiliation:(1) College of Resources and Environmental Sciences, Southwest University, Chongqing; 400715, China; (2) College of Resources and Environmental Sciences, Wuhan University, Wuhan; 430079, China
Corresponding author:Xu, Wei-Hong(xuwei_hong@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1654-1666
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Soil incubation experiment and pot experiment were carried out to investigate the influence of nano zeolite (NZ) and ordinary zeolite (OZ) on the soil pH, cation exchange capacity, concentration of soil Cd, soil Cd fraction and Cd uptake by Chinese cabbage when exposed to different Cd pollution levels(1, 5, 10 and 15 mg&middot;kg<sup>-1</sup>). The results of soil incubation experiment showed that the nano zeolite and ordinary zeolite dose(5, 10 and 20 g&middot;kg<sup>-1</sup>) increased the soil pH and cation exchange capacity, and decreased the concentration of soil exchangeable Cd, while increased the concentration of Cd in carbonate, Fe-Mn oxide, organic matter and residual fraction. The lowest EX-Cd was observed in the high nano zeolite (20 g&middot;kg<sup>-1</sup>) treatment. The soil pH and cation exchange capacity was extremely negatively correlated with the concentration of soil exchangeable Cd(P&lt;0.01), and extremely positively correlated with the concentration of soil Fe-Mn oxide Cd(P&lt;0.01). The results of pot experiment showed that the FDC of exchangeable Cd in soil decreased by 6.4%-63.2%, and the FDC of water-extractable and ethnol-extractable Cd in Chinese cabbage decreased by 2.1%-56% and 11.8%-100% with zeolite application, respectively. Moreover, the reduction effect of nano zeolite on Cd concentration in soil and plant was better than that of ordinary zeolite. The FDC of Cd fraction in shoot of Chinese cabbage showed correlation with the FDC of carbonate Cd and organic matter Cd in soil(P&lt;0.05) when exposed to 1 mg&middot;kg<sup>-1</sup>Cd pollution. Moreover, correlation was also found in the FDC of organic matter Cd and residual Cd in soil(P&lt;0.05) under 5 mg&middot;kg<sup>-1</sup>Cd pollution. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Soil pollution
Controlled terms:Binary alloys - Biogeochemistry - Biological materials - Cadmium - Cadmium alloys - Cadmium compounds - Electric network topology - Iron alloys - Manganese - Manganese alloys  - Organic compounds - Pollution - Positive ions - Soils - Zeolites
Uncontrolled terms:Cation exchange capacities - Cd concentrations - Chinese cabbage - Pollution level - Reduction effects - Residual fraction - Soil incubation - Soil pH
Classification code:461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 483.1  Soils and Soil Mechanics - 543.2  Manganese and Alloys - 545.2  Iron Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 703.1  Electric Networks - 804.1  Organic Compounds - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.18e+01% to 1.00e+02%, Percentage 2.10e+00% to 5.60e+01%, Percentage 6.40e+00% to 6.32e+01%
DOI:10.13227/j.hjkx.201610095

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 82>

Accession number:20172603860974
Title:Nitrate Source Identification and Nitrification-denitrification at the Sediment-water Interface
Authors:Jin, Zan-Fang (1); Gong, Jia-Lin (1); Shi, Yi-Li (1); Jin, Man-Tong (1); Li, Fei-Li (1)
Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310032, China
Corresponding author:Li, Fei-Li(lifeili@zjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1423-1430
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Identifying nitrate sources and its transformation mechanisms are important for nitrate pollution control in surface water. The columnar core sediment samples in West Lake were taken in different seasons. The transformation of nitrogen at the sediment-water interface was studied using nitrogen and oxygen isotopes, stable isotope analysis in R (SIAR) and acetylene inhibition method in the West Lake, Hangzhou. The results showed that the concentration gradient of both NO<inf>3</inf><sup>-</sup>and NH<inf>4</inf><sup>+</sup>existed at the sediment-water interface. NO<inf>3</inf><sup>-</sup>concentrations decreased from bottom water to pore water and NO<inf>3</inf><sup>-</sup>was accumulated in sediments. NH<inf>4</inf><sup>+</sup>concentrations increased from bottom water to pore water and NH<inf>4</inf><sup>+</sup>was released from sediments. Nitrate sources in bottom water where nitrification exited were sewage (manure), soil nitrogen, chemical fertilizer and precipitation. Sewage (manure) was the major nitrogen contributor (60.8%) in summer. Particularly high &delta;<sup>15</sup>N values in pore water indicated that there was strong denitrification at the sediment-water interface in West Lake. The average nitrification rate and denitrification rate at the sediment-water interface were 2.85 mmol&middot;(m<sup>2</sup>&middot;d)<sup>-1</sup>and 23.51 &mu;mol&middot;(m<sup>2</sup>&middot;d)<sup>-1</sup>, respectively. The sediment-water interface played a role in nitrogen removal process in aquatic environment. Seasonal and spatial variations of nitrification rates and denitrification rates were found in this study. Temperature and dissolved oxygen were the main influential factors for the transformation of nitrogen at the sediment-water interface in West Lake. &copy; 2017, Science Press. All right reserved.
Number of references:40
Main heading:Water pollution control
Controlled terms:Biochemical oxygen demand - Denitrification - Dissolved oxygen - Fertilizers - Isotopes - Lakes - Manures - Nitrates - Nitrification - Nitrogen  - Nitrogen fertilizers - Nitrogen removal - Oxygen - Pollution control - Precipitation (chemical) - River pollution - Sediments - Sewage - Water - Water pollution
Uncontrolled terms:Concentration gradients - Denitrification rate - Nitrification-denitrification - Nitrogen and oxygen isotopes - Nitrogen removal process - Sediment water interface - Stable-isotope analysis - Transformation mechanisms
Classification code:452.1  Sewage - 453  Water Pollution - 453.2  Water Pollution Control - 483  Soil Mechanics and Foundations - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 821.5  Agricultural Wastes
Numerical data indexing:Percentage 6.08e+01%
DOI:10.13227/j.hjkx.201606116

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 83>

Accession number:20172603860970
Title:Distribution Characteristics of Water Temperature and Water Quality of Fuxian Lake During Thermal Stratification Period in Summer
Authors:Wang, Lin-Jie (1); Yu, Hui (1); Niu, Yong (1); Niu, Yuan (1); Zhang, You-Lin (2); Liu, Qian (1); Ji, Zheng-Yuan (3)
Author affiliation:(1) Research Center of Lake Eco-Environment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) Fuxian Lake Administration of Yuxi Municipality, Yuxi; 653199, China; (3) Environmental Monitoring Station of Yuxi, Yuxi; 653100, China
Corresponding author:Yu, Hui(yuhui@creas.org.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1384-1392
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to explore the distribution characteristics and change rule in daytime of the water temperature and water quality of the deep plateau lake Fuxian Lake during the thermal stratification period in summer, a typical point location was selected respectively in the south, middle and north of Fuxian Lake in July 2014 to carry out investigation and observation after stratified sampling at each point location and continuous stratified sampling of the point location in the north during daytime. The result showed that &#9312;The distribution of water temperature of Fuxian Lake in summer had the temperature distribution characteristics of deep lake during stratification period. The segment from the surface to a depth of 15 meters was epilimnion with a range of 25.51-22.81&#8451;. The segment from the depth of 15m to 40m was thermocline with a range of 22.81-14.72&#8451;. The segment below 40m was hypolimnion with a range of 14.72-13.70&#8451;. The max temperature difference between the surface and the lakebed was 11.8&#8451;, which was smaller than that of lakes in temperate zone during the same period. The temperature of the lakebed was about 14&#8451; which was higher than that of the lakes in temperate zone,which reflected the characteristics of water temperature stratification of the deep plateau lake Fuxian Lake; &#9313; The water temperature stratification determined the characteristics of chemical stratification and the ecological stratification: the pH, DO and conductivity presented the same layered structure as the distribution of water temperature. What is noteworthy was that the DO concentration of the lakebed was as low as 2-3mg&middot;L<sup>-1</sup>. As an oligotrophic lake, the DO became lower and lower at the lakebed of Fuxian Lake, which indicated that it possibly faced ecological risks. Due to the separation of thermocline, the nutritive salt accumulative effect appeared in the hypolimnion. Chlorophyll a and permanganate index had a corresponding response relation with the water temperature stratification and showed the max value at the upper layer of the lake. &#9314; During the thermal stratification period, the water temperature stratification of Fuxian Lake had a change during daytime. The increased thermal radiation in the noon caused the thermocline to dive, the strength to increase and the depth to narrow, which significantly influenced the dynamic distribution of pH, DO, conductivity and chlorophyll a of the epilimnion and the thermocline. The change rule of TP, TN and permanganate index during the daytime was not significant. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Lakes
Controlled terms:Chlorophyll - Ecology - Location - Stream flow - Temperature - Temperature distribution - Thermal stratification - Water quality
Uncontrolled terms:Distribution characteristics - Distribution of water - Dynamic distribution - Layered Structures - Stratified sampling - Temperature differences - Vertical distributions - Water temperatures
Classification code:407.2  Waterways - 445.2  Water Analysis - 454.3  Ecology and Ecosystems - 641.1  Thermodynamics - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 2.00e-03kg/m3 to 3.00e-03kg/m3, Size 1.50e+01m, Size 1.50e+01m to 4.00e+01m, Size 4.00e+01m
DOI:10.13227/j.hjkx.201607165

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 84>

Accession number:20172603860981
Title:Simultaneous Photocatalytic Reduction of Cr(VI) and Oxidation of SSA by Carbon Nitride
Authors:Li, Li-Li (1, 2); Chen, Cui-Bai (1); Lan, Hua-Chun (2); Liu, Fei (1); An, Xiao-Qiang (2)
Author affiliation:(1) School of Water Resources and Environment, China University of Geosciences, Beijing; 100083, 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:An, Xiao-Qiang(xqan@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1483-1489
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Carbon nitride is a novel nonmetal semiconductor photocatalyst, which has developed into an ideal environmental treatment material in recent years. Graphite carbon nitride(g-C<inf>3</inf>N<inf>4</inf>) was prepared through pyrolysis melamine, and the structure, morphology and optical properties of samples were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM) and UV-Vis diffuse reflectance spectra(UV-Vis DRS). The potential application of g-C<inf>3</inf>N<inf>4</inf>in the simultaneous photocatalysis reduction of Cr(VI) and oxidation of sulfosalicylic acid(SSA) was further explored. And the effects of different conditions such as catalyst dosage, pH and initial concentration ratio of Cr(VI) with SSA on the simultaneous photocatalysis were also investigated. The results showed that when the catalyst dosage was 0.5 g&middot;L<sup>-1</sup>, pH=2, the initial concentration ratio of Cr (VI) and SSA was 1&#8758;4(10 mg&middot;L<sup>-1</sup>&#8758;40 mg&middot;L<sup>-1</sup>), optimal simultaneous photocatalysis efficiency was achieved, which was more than 3 times higher than that of the separated photoreduction or photooxidation reactions. Within 3 hours, the reduction ratio of Cr(VI) and oxidation ratio of SSA could reach 98.9% and 93.4%, respectively. The mechanism of simultaneous photocatalysis was discussed. Cr(VI) was reduced by electrons and SSA was oxidized by the combined function of hole, O<inf>2</inf><sup>&middot;-</sup>and &middot;OH under visible light. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Carbon nitride
Controlled terms:Catalysis - Catalysts - Chromium compounds - High resolution transmission electron microscopy - Nitrides - Optical properties - Oxidation - Photocatalysis - Photooxidation - Transmission electron microscopy  - X ray diffraction
Uncontrolled terms:Environmental treatment - G-C<inf>3</inf>N<inf>4</inf> - Initial concentration - Photocatalysis reduction - Reaction mechanism - Semiconductor photocatalyst - Sulfosalicylic acid - UV-vis diffuse reflectance spectra
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 5.00e-01kg/m3, Percentage 9.34e+01%, Percentage 9.89e+01%, Time 1.08e+04s
DOI:10.13227/j.hjkx.201609180

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 85>

Accession number:20172603860989
Title:Nitrogen Removal Characteristics and Diversity of Microbial Community in ANAMMOX Reactor
Authors:Cao, Yan (1); Wang, Tong-Yu (1); Qin, Yu-Jie (1, 2, 3); Han, Bin (1); Ren, Jun-Yi (1)
Author affiliation:(1) College of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou; 510006, China; (3) Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou; 510006, China
Corresponding author:Qin, Yu-Jie(qinyujie@scut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1544-1550
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The volume loading of upflow blanket filter increased from 0.52 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>to 2.75 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>by improving the influent NH<inf>4</inf><sup>+</sup>-N and NO<inf>2</inf><sup>-</sup>-N concentrations. The removal efficiency of NH<inf>4</inf><sup>+</sup>-N, NO<inf>2</inf><sup>-</sup>-N and TN increased from 76.18%, 53.47%, 55.66% to 94.04%, 86.97%, 82.96% respectively. Meanwhile, the microbial community of UBF ANAMMOX reactor was analyzed by Illumina high-throughput sequencing during the initial and later operational process. The results indicated that the denitrifying bacteria coexisted in the reactor. The percentages of Planctomycetes, Proteobacteria and Nitrospirae in the sludge were 27.9%-39.9%, 1.1%-26.4% and 0.035%-0.188%, respectively. The proportions of Planctomycetes and Proteobacteria increased from 1.1%, 27.9% in the enrichment stage to 26.4%, 39.9% in the stable operation stage respectively. In addition, Planctomycetes increased significantly. The proportion of Brocadiacea reached 24.57%. Therefore, Brocadiacea became the dominant bacteria in the phylum Planctomycete, which contained Candidatus brocadia. The alpha diversity index and relative abundance of clustering figure indicated that the diversity of microbial community decreased gradually and the structure of microbial community changed obviously. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Nitrogen removal
Controlled terms:Bacteria - Denitrification - Microorganisms - Nitrogen compounds - Nitrogen oxides - Wastewater treatment
Uncontrolled terms:ANAMMOX - Anammox bacteria - High-throughput sequencing - Microbial communities - Upflow blanket filter
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461.9  Biology - 802.2  Chemical Reactions - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.10e+00%, Percentage 2.46e+01%, Percentage 2.64e+01%, Percentage 2.79e+01%, Percentage 2.79e+01% to 3.99e+01%, Percentage 3.50e-02% to 1.88e-01%, Percentage 3.99e+01%, Percentage 5.35e+01% to 9.40e+01%, Percentage 7.62e+01%, Percentage 8.30e+01%, Percentage 8.70e+01%
DOI:10.13227/j.hjkx.201610081

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 86>

Accession number:20172603861008
Title:Microbial Community Structure and Diversity in Cellar Water by 16S rRNA High-throughput Sequencing
Authors:Yang, Hao (1, 2); Zhang, Guo-Zhen (1, 2); Yang, Xiao-Ni (3); Wu, Fu-Ping (1, 2); Zhao, Wei (1, 2); Zhang, Hong-Wei (1); Zhang, Xiang (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; (2) Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou; 730070, China; (3) College of Natural Resources and Environment, Gansu Agricultural University, Lanzhou; 730070, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1704-1716
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study was aimed to explore the bacterial diversity of cellar water as well as to study the relationship between the bacterial diversity and environmental factors. The MiSeq high-throughput sequencing was used to analyze and compare the bacterial diversity and community composition of samples from different cellar water samples. Overall 1 605 optimized reads were obtained from four samples based on high-throughput sequencing of the V4 region of the 16S rRNA gene. Bacterial species detected in these samples covered 22 phyla, 42 classes, 71 orders, 115 families, 146 genera. Analysis showed that the bacterial diversity was very high in these samples, and there were differences among different samples. The distribution characteristics of the dominant bacteria showed patterns of a large number of rare species and a few common types. Taxonomic assignment analysis indicated that Bacteroidetes, Proteobacteria, Actinobacteria, Verrucomicrobia, OD1 dominated in the Cellar water, and accounted for 87.1% to 94.8% at phylum level. The predominant groups were Actinobacteria, Acidimicrobiia, Cytophagia, Flavobacteriia, Sphingobacteriia, &alpha;-Proteobacteria, &beta;-Proteobacteria, &gamma;-Proteobacteria, Opitutae, Verrucomicrobiae, Pedosphaerae and ZB2 at class level. At genus level Rhodobacter, Dechloromonas, Flavobacterium, Acinetobacter, Comamonas, Pseudomonas, Hydrogenophaga, et al were the abundant taxa, which were mainly denitrifying bacteria and heterotrophic nitrification-aerobic denitrification bacteria. The result of RDA suggested that the influences of different environmental factors on different microbes were different. Bacterial community II had significant positive correlation with UV<inf>254</inf>, permanganate index, BOD<inf>5</inf>, and Bacterial community III had significant positive correlation with TN, NO<inf>2</inf><sup>-</sup>-N, NO<inf>3</inf><sup>-</sup>-N, TP, NH<inf>4</inf><sup>+</sup>-N. This research should deepen the understanding on microbial community in Cellar water, and provide references for the association of bacterial composition and diversity with environmental factors. &copy; 2017, Science Press. All right reserved.
Number of references:45
Main heading:Bacteria
Controlled terms:Aerobic bacteria - Denitrification - Microorganisms - Nitrogen compounds - RNA - Throughput
Uncontrolled terms:Bacterial diversity - Community composition - Denitrifying bacteria - Distribution characteristics - Heterotrophic nitrification-aerobic denitrifications - High-throughput sequencing - Microbial community structures - Rain water harvesting
Classification code:461  Bioengineering and Biology - 802.2  Chemical Reactions
Numerical data indexing:Percentage 8.71e+01% to 9.48e+01%
DOI:10.13227/j.hjkx.201608097

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 87>

Accession number:20172703864531
Title:Source Analysis, Spatial Distribution and Pollution Assessment of Heavy Metals in Sewage Irrigation Area Farmland Soils of Longkou City
Authors:Li, Chun-Fang (1); Wang, Fei (1); Cao, Wen-Tao (1); Pan, Jian (1); L&uuml;, Jian-Shu (1); Wu, Quan-Yuan (1)
Author affiliation:(1) College of Geography and Environment, Shandong Normal University, Ji'nan; 250014, China
Corresponding author:L&uuml;, Jian-Shu(lvjianshu@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1018-1027
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Farmland soils in sewage irrigation area at Longkou City were collected, soil pH together with the heavy metal content were tested. Taking 70 soil points as the study object, this paper investigated the source of heavy metals in this area based on the correlation analysis and PCA of multivariate statistical analysis theory. We studied the spatial variation and distribution characteristics about heavy metals using both the theory of geostatistics and GIS spatial interpolation method. At last, the heavy metal pollution was evaluated in the way of Nemerow Index and improved fuzzy evaluation method. It turned out that, 9 kinds of heavy metal elements in the soil of research area had a certain degree of enrichment, among them the average of Cd was 3.06 times as high as the background value, and its enrichment was most severe. The result of Nemerow Index showed that, the values of comprehensive pollution index of Cu, Cd and Pb respectively were 7.06, 6.10 and 5.54, and they all belonged to high levels of pollution. According to the results of correlation analysis and principal component analysis, Cu, Zn together with Pb, Cd were mainly affected by human factors, sewage irrigation was their common pollution factor, the pollution sources for the first two heavy metals included excessive use of chemical fertilizers and pesticides in agricultural production and the accumulation of long time, whereas pollution from northern coal mining and coal gangue piled up as well as plating, machinery manufacturing and other industrial pollution were the pollution sources of the latter two elements. Other elements (Co, Cr, Mn, Ni and As) were mainly influenced by natural factors such as parent material. Comprehensive evaluation results showed that, among the 70 points, 13 points had moderate pollution, 23 points belonged to light pollution, 28 points were at alert level, 6 points were in the safe range. From the perspective of spatial distribution, high value areas of heavy metal contents were mainly concentrated in towns of Zhuyouguan and Xufu. This showed that, sewage irrigation caused a certain degree of heavy metal pollution to local soil. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Copper
Controlled terms:Agriculture - Cadmium - Chemical analysis - Correlation methods - Electron emission - Farms - Fertilizers - Heavy metals - Irrigation - Lead  - Machinery - Metal analysis - Multivariant analysis - Pollution - Principal component analysis - Sewage - Soils - Spatial distribution - Statistical methods
Uncontrolled terms:Fuzzy comprehensive evaluation - Geo-statistics - Multivariate statistical analysis - Pollution sources - Sewage irrigation
Classification code:452.1  Sewage - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 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 - 821.3  Agricultural Methods - 921  Mathematics - 922  Statistical Methods - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201607201

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 88>

Accession number:20172703864550
Title:Effect of PFOA on Oxidative Stress and Membrane Damage of Escherichia coli
Authors:Yang, Meng (1, 2, 3, 4); Li, Yi (1, 2, 3, 4); Ye, Jin-Shao (1, 2, 3, 4); Long, Yan (1, 2, 3, 4); Qin, Hua-Ming (1, 2, 3, 4)
Author affiliation:(1) School of Environment, Jinan University, Guangzhou; 510632, China; (2) Key Laboratory of Environmental Pollution and Health of Guangdong Province, Guangzhou; 510632, China; (3) Guangdong Provincial Research Center for Environment Pollution Control and Remediation Materials, Guangzhou; 510632, China; (4) Key Laboratory of Environmental Exposure and Health of Guangzhou, Guangzhou; 510632, China
Corresponding author:Qin, Hua-Ming(huamingqin@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1167-1172
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Perfluorooctanoic acid (PFOA) is widely used in industrial production because of its strong chemical stabilities and good hydrophobic and oleophobic properties. It was considered to be a widespread persistent organic pollutant in environment in recent years. The oxidative stress and membrane damage of Escherichia coli exposed to PFOA were measured by flow cytometry (FCM) and the toxic mechanism of PFOA was also preliminarily explored. The results showed that, under the stress of PFOA, the intracellular reactive oxygen species (ROS) content of E. coli increased, the unsaturation degree of fatty acid decreased, the malondialdehyde (MDA) content increased, the membrane permeability increased, the membrane potential decreased, and the activities of Na<sup>+</sup>K<sup>+</sup>-ATPase and Ca<sup>2+</sup>Mg<sup>2+</sup>-ATPase showed a compensatory increase first and then decreased. Therefore, owing to the stress of PFOA, the higher intracellular ROS in E. coli reacted with membrane unsaturated fatty acids by peroxidation, and then reduced cell membrane fatty acid saturation, accumulated MDA in cells, and further caused damage to cell membrane, reduced the ATPase activity, and eventually resulted in inactivation or apoptosis of E. coli. This study provided more evidence for the further study on environmental ecological toxicology of PFOA. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Fatty acids
Controlled terms:Aldehydes - Cell death - Cytology - Escherichia coli - Flow cytometry - Membranes - Organic pollutants - Unsaturated fatty acids
Uncontrolled terms:ATPase - Cell membrane fatty acid - Industrial production - Malondialdehyde - Membrane permeability - Perfluorooctanoic acid - Persistent organic pollutant (POP) - Reactive oxygen species
Classification code:461.9  Biology - 741.3  Optical Devices and Systems - 804.1  Organic Compounds - 951  Materials Science
DOI:10.13227/j.hjkx.201609001

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 89>

Accession number:20172703864542
Title:Impact of Starvation Conditions on Biological Community Structure in Sulfur Autotrophic Denitrification Reactor
Authors:Li, Fang-Fang (1, 2); Shi, Chun-Hong (1, 2); Li, Hai-Bo (1); Yuan, Rong-Fang (1); Ma, Fang-Shu (1)
Author affiliation:(1) College of Energy and Environmental Engineering, Beijing University of Science and Technology, Beijing; 100083, China; (2) Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing; 100083, China
Corresponding author:Shi, Chun-Hong(sch.22@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1109-1115
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sulfur/dolomite and pyrite/dolomite autotrophic denitrification reactors were applied to treat the secondary effluent of wastewater treatment plant to explore the removal effect, the changes of microbial community, and recovery time of reactors after starvation period. It was shown in the results that after 30 d non-water starvation endurance, the effluent concentrations of NO<inf>3</inf><sup>-</sup>-N in sulfur/dolomite and pyrite/dolomite reactors increased from 1.78 mg&middot;L<sup>-1</sup>, 11.32 mg&middot;L<sup>-1</sup>to 27.87 mg&middot;L<sup>-1</sup>, 26.56 mg&middot;L<sup>-1</sup>respectively at the low temperature of 12-14&#8451;. In addition, sulfur/dolomite and pyrite/dolomite reactors recovered within 5 d and 11 d since restarted and could maintain a good effect of nitrogen removal at low temperature. MiSeq high throughput sequencing results showed that the abundance and diversity of the bacterial communities in starvation period in both reactors were lower than those in recovery period. The dominating phylum was Proteobacteria in both reactors while the dominating class was &beta;-Proteobacteria. Thiobacillus was identified as the main genus for denitrification in sulfur/dolomite reactor. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Effluents
Controlled terms:Denitrification - Effluent treatment - Nitrogen removal - Recovery - Secondary recovery - Social sciences - Sulfur - Temperature - Throughput - Wastewater treatment
Uncontrolled terms:Autotrophic denitrification - Community structures - High-throughput sequencing - Low temperatures - Microbial diversity - Starvation period
Classification code:452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 511.1  Oil Field Production Operations - 641.1  Thermodynamics - 802.2  Chemical Reactions - 804  Chemical Products Generally - 971  Social Sciences
Numerical data indexing:Mass_Density 1.78e-03kg/m3 to 2.79e-02kg/m3, Mass_Density 2.66e-02kg/m3
DOI:10.13227/j.hjkx.201609008

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 90>

Accession number:20172703864554
Title:Effect of Different Iron Minerals on Bioaccessibility of Soil Arsenic Using in vitro Methods
Authors:Zhong, Song-Xiong (1, 2); Yin, Guang-Cai (1); Huang, Run-Lin (1); He, Hong-Fei (1); Chen, Zhi-Liang (2); Lin, Qin-Tie (1); Wang, Wen-Ke (1)
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; 510665, China
Corresponding author:Chen, Zhi-Liang(chenzhiliang@scies.org)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1201-1208
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To explore the effects of different iron minerals on soil arsenic bioaccessibility, ferrihydrite, goethite and hematite were used in PBET, SBRC and IVG in-vitro experiments in this study. The relationship between arsenic bioavailability in gastric, small intestinal phases and arsenic speciation was also studied. The results showed that when 1% ferrihydrite was added, arsenic bioavailability in gastric phase was 2.22%, 5.11% and 7.43% by PBET, SBRC and IVG methods, respectively, while in the small intestinal phase it was 3.39%, 2.33% and 6.18%. At an elevated ferrihydrite dosage of 2%, significant difference in arsenic bioavailability was observed in both phases (P&lt;0.05). According to in vitro experiments, the addition of the same amount of different iron minerals had contributed to the decrease in arsenic bioavailability to varying extents in contrast with the blank group, in the descending order of ferrihydrite (F1)&gt;goethite (G1)&gt;hematite (H1) (F2&gt;G2&gt;H2). Total arsenic in exchangeable (F1) and specifically sorbed (F2) state was found positively correlated with arsenic bioavailability in gastric phase by PBET, SBRC and IVG methods, the correlation coefficient of which being r=0.93, P=0.002, r=0.90, P=0.004 and r=0.89, P=0.006, respectively. It was also found that arsenic bioavailability in gastric phase was positively correlated with total arsenic in F1 and F2 states by PBET (r=0.94, P=0.001) and IVG (r=0.87, P=0.009) methods, but no significant correlation was observed by SBRC method. Additionally, three in vitro experiments showed that amorphous iron bound arsenic had significant negative correlation with arsenic bioavailability in gastric phase and small intestinal phase, except that no correlation was found in small intestinal phase by SBRC method. &copy; 2017, Science Press. All right reserved.
Number of references:42
Main heading:Arsenic
Controlled terms:Biochemistry - Hematite - Iron - Minerals - Stabilization
Uncontrolled terms:Arsenic bioavailability - Arsenic speciation - Bioaccessibility - Correlation coefficient - In-vitro - Iron minerals - Negative correlation - Total arsenics
Classification code:482.2  Minerals - 545.1  Iron - 801.2  Biochemistry - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.00e+00%, Percentage 2.00e+00%, Percentage 2.22e+00%, Percentage 2.33e+00%, Percentage 3.39e+00%, Percentage 5.11e+00%, Percentage 6.18e+00%, Percentage 7.43e+00%
DOI:10.13227/j.hjkx.201608107

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 91>

Accession number:20172703864533
Title:Peroxidation of High Algae-laden Water by Ozone: Algae Organic Matter Transformation and Disinfection By-products Formation
Authors:Zhang, Sai (1); Hu, Xue-Bin (1); Gu, Li (1); Li, Li (1); Guo, Xian-Qiang (2)
Author affiliation:(1) Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing; 400045, China; (2) China Southwest Architectural Design and Research Institute Co., Ltd., Shandong Branch, Qingdao; 266073, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1038-1045
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Formation characteristics and transferring feature of nitrogenous/carbonaceous disinfection by-products have been observed under different ozone dosages and pH conditions, and essential nature conversion of Algae organic matters has been also studied concurrently, based on high algae-laden water. The results showed as follows: reduction of Microcystis aeruginosa could reach 36% at the ozonation concentration of 28.92 mg&middot;L<sup>-1</sup>. Humic acid-like compounds first increased and then decreased with continuing addition of ozone dosage, whereas soluble microbial products, fulvic acids and aromatic protein substance all diminished. Low dosage of ozone had certain effect on control of dichloroacetonitrile (DCAN) and trichloroacetonitrile (TCAN) formation potential, yet augmented the yield of trichloronitromethane (TCNM) and 1,1,1-trichloroacetone (1,1,1-TCP) precursors, and N-DBPs formation potential was promoted with the increase of ozone dosage. Algae removal efficiency was relatively the best under the acidic condition, meanwhile, UV<inf>254</inf>and DOC increased with the rise of pH, though the change was not outstanding. Humic acid-like compounds decreased with the rise of pH; ozonation could degrade the soluble microbial products and the consequence was affected little by the change of pH. DCAN and TCAN formation potential decreased with the rise of pH; TCNM formation potential appeared to be the highest when the pH was 10, whereas the highest 1,1,1-TCP formation potential was found at pH 7. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Ozone water treatment
Controlled terms:Algae - Biogeochemistry - Biological materials - Disinfection - Organic acids - Organic compounds - Ozone - Ozonization - pH - Transmission control protocol
Uncontrolled terms:Disinfection by-product - Disinfection by-products formations - Fluorescence excitation emission matrix - Formation characteristics - Microcystis aeruginosa - Nitrogenous disinfection by-products - Soluble microbial products - Trichloronitromethane
Classification code:461.2  Biological Materials and Tissue Engineering - 723  Computer Software, Data Handling and Applications - 801.1  Chemistry, General - 801.2  Biochemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 2.89e-02kg/m3, Percentage 3.60e+01%
DOI:10.13227/j.hjkx.201608080

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 92>

Accession number:20172703864535
Title:Fenton-like Catalytic Removal of Organic Pollutants in Water by Framework Cu in Cu-Al<inf>2</inf>O<inf>3</inf>
Authors:Xu, Dan (1); Zhang, Li-Li (2); Liu, Li-Fen (1)
Author affiliation:(1) School of Food and Environment, Dalian University of Technology, Panjin; 124221, China; (2) Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China
Corresponding author:Zhang, Li-Li(llzhang@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1054-1060
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To address the problem of low activity for Fe-based Fenton-like catalysts at neutral pH, Cu-Al<inf>2</inf>O<inf>3</inf>Fenton-like catalyst was prepared by a simple co-precipitation method. The samples were characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and diffuse reflectance UV-vis spectra (UV-vis DRS). The results showed that both Cu<sup>2+</sup>and Cu<sup>+</sup>mainly existed in the bulk framework of Al<inf>2</inf>O<inf>3</inf>for Cu-Al<inf>2</inf>O<inf>3</inf>with appropriate Cu doping (lower than 4.77% Cu), forming the bond of Al-O-Cu, while excessive Cu doping in Al<inf>2</inf>O<inf>3</inf>(e.g. 7.58% Cu) could result in the occurrence of extraframework Cu species. The Fenton-like catalytic performance of the prepared samples was evaluated by the degradation of 2-chlorophenol (2-CP) and Rhodamine B (RhB). The results showed that the catalyst with framework Cu species had high catalytic activity and stability for the degradation of 2-CP and RhB. After reaction for 2 h, the degradation rate of 2-CP reached up to 54% over Cu-Al<inf>2</inf>O<inf>3</inf>(4.77% Cu) in the presence of H<inf>2</inf>O<inf>2</inf>, the corresponding TOC removal reached 49%, and the Cu release concentration was only 0.0255 mg&middot;L<sup>-1</sup>. However, the existence of extraframework Cu in Al<inf>2</inf>O<inf>3</inf>would lead to the reduction of the catalytic performance. ESR analysis showed that &middot;OH and HO<inf>2</inf><sup>-</sup>/O<inf>2</inf><sup>-&middot;</sup>were the primary active species. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Copper alloys
Controlled terms:Aluminum - Aluminum alloys - Binary alloys - Catalyst activity - Catalysts - Degradation - Organic pollutants - Photoelectron spectroscopy - Pollution - Precipitation (chemical)  - Water pollution - Water treatment - X ray diffraction - X ray photoelectron spectroscopy
Uncontrolled terms:2-chlorophenols - Active species - Catalytic performance - Catalytic removal - Coprecipitation method - Degradation rate - Diffuse reflectance-UV-vis - Fenton likes
Classification code:445.1  Water Treatment Techniques - 453  Water Pollution - 541.1  Aluminum - 541.2  Aluminum Alloys - 544.2  Copper Alloys - 802.2  Chemical Reactions - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 2.55e-05kg/m3, Percentage 4.90e+01%, Percentage 5.40e+01%, Time 7.20e+03s
DOI:10.13227/j.hjkx.201608058

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 93>

Accession number:20172703864551
Title:Physicochemical Properties and Antibacterial Effect of Silver Nanoparticles: A Comparison of Environmental and Laboratorial Conditions
Authors:Yi, Jun (1, 2); 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
Corresponding author:Cheng, Jin-Ping(jinpingcheng@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1173-1181
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study aimed to understand how the physicochemical properties of silver nanoparticles (AgNPs) affected its toxicity in the aquatic environment. The morphologies of oleylamine-coated AgNPs (4 nm) under environmental and laboratory water conditions were studied under transmission electron microscopy, and the results showed oleylamine-coated AgNPs formed big aggregates in the environmental water samples after 12 h equilibration. Dynamic light scattering results also showed that oleylamine-coated AgNPs had larger hydrodynamic size in all water samples as compared to its primary size (4 nm). Exposure to oleylamine-coated AgNPs inhibited the growth of Bacillus subtilis (B. subtilis) and reduced its cell viability in Luria-Bertani (LB) broth and 0.85% NaCl, respectively. A dose-dependent toxicity of AgNPs in B. subtilis was observed in laboratorial medium conditions but not in environmental water condition. Low concentration of AgNPs exhibited lower toxicity in environmental water samples as compared to that in laboratorial medium conditions. Separating AgNPs from bacterial suspension through a dialysis membrane enhanced the cell viability of B. subtilis significantly. In the environmental water samples, the AgNPs-bacteria interaction would be reduced with the formation of big aggregates by AgNPs, which consequently decreased its toxicity in aquatic environment. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Silver
Controlled terms:Aggregates - Bacteriology - Dialysis membranes - High resolution transmission electron microscopy - Metal nanoparticles - Nanoparticles - Toxicity - Transmission electron microscopy
Uncontrolled terms:Aquatic toxicity - Bacillus Subtilis - Environmental water samples - Laboratorial medium conditions - Silver nanoparticles
Classification code:406  Highway Engineering - 461.7  Health Care - 547.1  Precious Metals - 741.3  Optical Devices and Systems - 761  Nanotechnology
Numerical data indexing:Percentage 8.50e-01%, Size 4.00e-09m, Time 4.32e+04s
DOI:10.13227/j.hjkx.201608182

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 94>

Accession number:20171003409535
Title:Sources and pollution characteristics of antibiotic resistance genes and conditional pathogenic bacteria in concentrated poultry feeding operations
Authors:Gao, Min (1); Qiu, Tian-Lei (1); Qin, Yu-Cheng (2); Wang, Xu-Ming (1, 3)
Author affiliation:(1) Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing; 100097, China; (2) Pinggu Animal Health Inspection of Beijing, Beijing; 101200, China; (3) Key Laboratory of Urban Agriculture (North), Ministry of Agriculture, Beijing; 100097, China
Corresponding author:Wang, Xu-Ming(wangxuming@baafs.net.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:510-516
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Concentrated animal feeding operations (CAFOs) is considered a source of airborne human pathogens and antibiotic resistance genes. This study collected fecal samples and corresponding air samples from inside and outside atmospheric environments of layer and broiler feeding operations. We detected the types of 61 genes including five classes of antibiotics antibiotic resistance genes (23 genes of ampicillin, 23 genes of tetracycline, 5 genes of quinolones, 5 genes of sulfonamides and 2 genes of erythromycin), five conditional pathogenic bacteria (Enterococcus, Escherichia coli, Staphylococcus, Campylobacter and Clostridium perfringens) and class1 integron. Quantitative real time PCR was used to analyze concentrations of typical genes with relatively high detection rates. The results indicated that the detection rates of antibiotic resistance genes were 8, 7, 2, 3 and 2. At the same time, two kinds of pathogenic bacteria were detected. The detection rates of the target genes in the air were lower than those of the fecal sample. The total bacterial gene (16S rDNA) concentration in the air of layer and broiler was 10<sup>6</sup>copies&middot;m<sup>-3</sup>, and that of the other typical genes was about 10<sup>4</sup>copies&middot;m<sup>-3</sup>. And the outdoor concentration was much lower than the indoor concentration. The proportions of antibiotic resistance genes and conditional pathogenic bacteria in the air were higher than those in the fecal samples and the outdoor proportions were lower than the indoor proportions. Preliminary results of this study indicated that feces was an important source of antibiotic resistance genes, conditional pathogenic bacteria and class1 integron. Aerosolization degrees of genes in feces were different. This study will provide the basic data for both source tracking of antibiotic resistance genes and pathogens from CAFOs and risk assessment of pollution of CAFOs in the surrounding air environment. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Genes
Controlled terms:Air quality - Antibiotics - Bacteria - Escherichia coli - Feeding - Pollution - Polymerase chain reaction - Risk assessment - Sulfur compounds
Uncontrolled terms:Antibiotic resistance genes - Atmospheric environment - Bioaerosols - Clostridium perfringens - Concentrated animal feeding operations - Feeding operations - Outdoor concentrations - Quantitative real time PCR
Classification code:451.2  Air Pollution Control - 461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 691.2  Materials Handling Methods - 801.2  Biochemistry - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201606162

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 95>

Accession number:20171003409544
Title:Repression of nitrogen and phosphorus release from lakeshore sediment by five littoral-zone plants
Authors:Yao, Cheng (1); Hu, Xiao-Zhen (1); Lu, Shao-Yong (1); Geng, Rong-Mei (1)
Author affiliation:(1) State Key Laboratory of Environmental Criteria and Risk Assessment, Research Center of Lake Eco-Environment, Chinese Academy of Environmental Sciences, Beijing; 100012, China
Corresponding author:Hu, Xiao-Zhen(huxz@craes.org.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:589-599
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The article researched the effect of Iris pseudacorus L., Paspalum distichum L., Leersia hexandra Swartz, Ludwigia peploides and Hydrocotyle vulgaris on the nitrogen and phosphorus repression in sandy soil from lower reaches of Yangtze River and clay from stored littoral zone. The result indicated that plants had a significant inhibitory effect on total phosphorus release from sediment, with concentration in overlaying water below 0.02 mg&middot;L<sup>-1</sup>in Paspalum distichum L., Hydrocotyle vulgaris, Iris pseudacorus group, below 0.03 mg&middot;L<sup>-1</sup>in Leersia hexandra Swartz, Ludwigia peploides group; with release rate below 0.1 d<sup>-1</sup>in Leersia hexandra Swartz and Ludwigia peploides group, below 0.05 d<sup>-1</sup>in Paspalum distichum L., Hydrocotyle vulgaris, Iris pseudacorus group. While the plants were proved to aggravate total nitrogen release by accumulating in sediment, with concentration in overlaying water below 0.4 mg&middot;L<sup>-1</sup>in Paspalum distichum and Iris pseudacorus L. group; with release rate below 0.02 mg&middot;L<sup>-1</sup>. Root weight density, root length density, root surface area density were major factors, which increased the proportion of particles in sediment with diameter of below 50 &mu;m, therefore decreased sediment resuspension against hydraulic disturbance; the root system also enriched total nitrogen in sediment and absorbed phosphorus from sediment. These five kinds of plants in terrestrial-aquatic transverse actually repressed nitrogen and phosphorus release from sediment in two ways mentioned above, Paspalum distichum L. and Iris pseudacorus L. possessed the best effect due to their developed root system, followed by Leersia hexandra Swartz and Hydrocotyle vulgaris, and Ludwigia peploides had the least effect. &copy; 2017, Science Press. All right reserved.
Number of references:22
Main heading:Sediments
Controlled terms:Nitrogen - Phosphorus - Plants (botany)
Uncontrolled terms:Inhibitory effect - Littoral zone - Nitrogen and phosphorus - Root length density - Root surface area - Root system - Sediment re suspensions - Total phosphorus
Classification code:483  Soil Mechanics and Foundations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 2.00e-05kg/m3, Mass_Density 3.00e-05kg/m3, Mass_Density 4.00e-04kg/m3, Size 5.00e-05m
DOI:10.13227/j.hjkx.201604237

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 96>

Accession number:20171003416414
Title:Fast start-up of SBAF System Assisted CANON process and the microbial analysis
Authors:Liu, Zhu-Han (1); Yue, Xiu (2); Yu, Guang-Ping (2); Jin, La-Hua (1); Tang, Jia-Li (2); Ji, Shi-Ming (2)
Author affiliation:(1) School of Environment, Jinan University, Guangzhou; 510632, China; (2) Shenyang Institute of Automation in Guangzhou, Chinese Academy of Sciences, Guangzhou; 511458, China
Corresponding author:Jin, La-Hua(profjin@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:253-259
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Long period start-up is one of the main restraining factors of the single-stage completely autotrophic nitrogen removal over nitrite (CANON) process. This study investigated the fast start-up of the CANON process initiated by a submerged biological aerated filter (SBAF) method. With conventional activated sludge from the secondary sedimentation tank of municipal waste water treatment plants as the seed sludge, the CANON process was successfully started up after the acclimation of sludge microorganisms for 48 days under the experimental conditions of (30&plusmn;2)&#8451;,organic carbon free and controlled dissolved oxygen(stage I: 0.3-0.5mg&middot;L<sup>-1</sup>; stage II-IV: 0.1-0.2mg&middot;L<sup>-1</sup>), with the maximum removal rates of ammonia nitrogen and total nitrogen achieved at 99.9% and 86.5%, respectively. The population structure characteristics of microorganisms in the system were studied using high-throughput sequencing of 16S rDNA amplicon. The results demonstrated that the two dominant microbial strains in the system were Proteobacteria and Planctomycetes, accounting for 26.6% and 17.8%, respectively. The major contributors of nitrogen removal were Nitrosomonas in &beta;-Proteobacteria and Candidatus brocadia in Brocadiae. Through the above experiments, it was revealed that the investigated SBAF based CANON possesses had the advantages of fast start-up, efficient biological nitrogen removal and stable operation process. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Activated sludge process
Controlled terms:Ammonia - Carbon - Dissolved oxygen - Microorganisms - Nitrogen - Nitrogen removal - Organic carbon - Seed - Waste treatment - Wastewater treatment  - Water treatment
Uncontrolled terms:16s rDNA sequencing - Ammonia nitrogen - CANON - Microbial populations - SBAF
Classification code:445.1  Water Treatment Techniques - 452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 461.9  Biology - 804  Chemical Products Generally - 821.4  Agricultural Products
Numerical data indexing:Age 1.32e-01yr, Mass_Density 1.00e-04kg/m3 to 2.00e-04kg/m3, Percentage 1.78e+01%, Percentage 2.66e+01%, Percentage 8.65e+01%, Percentage 9.99e+01%
DOI:10.13227/j.hjkx.201607085

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 97>

Accession number:20171003416392
Title:Fluorescence Spectral Characteristics of Fluorescent Dissolved Organic Matter (FDOM) in the Surface Sediments from Lihu Lake
Authors:Chen, Jun-Yi (1); Wang, Shu-Hang (1); Jiang, Xia (1); Huang, Xiao-Feng (2); Zhao, Li (1)
Author affiliation:(1) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (2) Wuxi Taihu Lake Restoration CO., Ltd., Wuxi; 214023, China
Corresponding author:Jiang, Xia(jiangxia@craes.org.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:70-77
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study investigated the spectral characteristics of fluorescent dissolved organic matter (FDOM) in sediments of Lihu Lake using three-dimensional excitation-emission matrix fluorescence spectroscopy (EEMS), and discussed the correlation between source of FDOM and organic or inorganic nitrogen. The results indicated that the surface sediments in Lihu Lake consisted of three fluorescence fractions (II), humic-like C1(240,310/420 nm), C2(260,360/460 nm), and tryptophan-like C3(225,275/340 nm). The total fluorescence intensity ranged from 49.97 to 159.19 R.U.&middot;g<sup>-1</sup>, and decreased from east to west with higher values in coast district than in lake center. The relative proportions of C1, C2, and C3 were 33.63%, 26.87% and 39.49%, respectively. The fluorescence index (FI), biological origin index (BIX), and humification index (HIX) ranged from 1.96 to 2.22, 0.69 to 0.94, and 2.62 to 4.39. It indicated that the main source of FDOM in Lihu Lake was from endogenesis, and mainly derived from microbes, algae and other newly autochthonous sources. The results illustrated, the fluorescence intensity had significant correlation with organic and inorganic nitrogen(P&lt;0.01), and had higher correlation with inorganic nitrogen. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Fluorescence
Controlled terms:Amino acids - Biogeochemistry - Biological materials - Dissolution - Fluorescence spectroscopy - Lakes - Nitrogen - Organic compounds - Sediments - Surficial sediments
Uncontrolled terms:Correlation analysis - Dissolved organic matters - Excitation-emission matrix fluorescence spectroscopies - Fluorescence intensities - Fluorescence spectra - Humification index (HIX) - Spectral characteristics - Surface sediments
Classification code:461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 483  Soil Mechanics and Foundations - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Percentage 2.69e+01%, Percentage 3.36e+01%, Percentage 3.95e+01%
DOI:10.13227/j.hjkx.201605148

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 98>

Accession number:20171003409552
Title:Nitrogen removal performance of ANAMMOX with different organic carbon sources
Authors:Guan, Yong-Jie (1); Yu, De-Shuang (1); Li, Jin (1); Qi, Pan-Qing (1); Wei, Si-Jia (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:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:654-664
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Anaerobic ammonium oxidation (ANAMMOX) has been regarded as an efficient process to treat high-strength wastewater without organic carbon source. To investigate the nitrogen removal performance of ANAMMOX in the presence of organic carbon source can broaden its application in organic wastewater treatment. In this work, an anaerobic sequencing batch reactor (ASBR) was used to study the effect of organic carbon source on ANAMMOX process. The experimental results indicated that the activity of anaerobic ammonia oxidizing bacteria (AAOB) decreased by 84.2% when 200 mg&middot;L<sup>-1</sup>COD of glucose was added. When sodium acetate was added, the activity of AAOB was affected little. Besides, it even promoted the activity with COD less than 120 mg&middot;L<sup>-1</sup>. The effect of sucrose on ANAMMOX process was similar to that of sodium acetate and the maximum specific ANAMMOX activity (SAA) increased by 25.0% with 80 mg&middot;L<sup>-1</sup>COD. When citric acid was added, the maximum SAA peaked with 80 mg&middot;L<sup>-1</sup>COD. The order of ANAMMOX promotion resulted from organic carbon source was sucrose, sodium acetate, citric acid and glucose. With addition of organic carbon source, nitrate could also be removed through the synergy of ANAMMOX and denitrification, and the total nitrogen removal efficiency increased. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Nitrogen removal
Controlled terms:Ammonia - Bacteria - Batch reactors - Chemical oxygen demand - Citric acid - Glucose - Nitrogen - Organic carbon - Sodium - Sugar (sucrose)  - Wastewater treatment
Uncontrolled terms:Ammonia oxidizing bacteria - Anaerobic ammonium oxidation - Anaerobic sequencing batch reactors - ANAMMOX - Organic wastewater treatment - Removal performance - Specific Anammox activity - Stoichiometric ratio
Classification code:452.4  Industrial Wastes Treatment and Disposal - 549.1  Alkali Metals - 802.1  Chemical Plants and Equipment - 804  Chemical Products Generally - 822.3  Food Products
Numerical data indexing:Mass_Density 1.20e-01kg/m3, Mass_Density 2.00e-01kg/m3, Mass_Density 8.00e-02kg/m3, Percentage 2.50e+01%, Percentage 8.42e+01%
DOI:10.13227/j.hjkx.201603179

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 99>

Accession number:20171003409536
Title:Distribution and burial characteristics of nitrogen forms in sediment of Dianchi Lake during last century
Authors:Wu, Ya-Lin (1); Li, Shuai-Dong (1); Jiang, Jun-Wu (1); Shen, Yin-Yin (1); Huang, Chang-Chun (1, 2, 3); Huang, Tao (1); Yang, Hao (1); Yu, Yan-Hong (4); Luo, Yu (4)
Author affiliation:(1) College of Geography Science, Nanjing Normal University, Nanjing; 210023, China; (2) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing; 210023, China; (3) Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing; 210023, China; (4) Kunming China International Research Center for Plateau Lake, Yunnan Institute of Environmental Science, Kunming; 650000, China
Corresponding author:Huang, Chang-Chun(huangchangchun@njnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:517-526
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to analyze the composition, distribution and burial characteristics of nitrogen in sediments of Dianchi Lake in the last hundred years, 6 sediment cores were sampled in July 2014 to determine the contents of different nitrogen species and sedimentary age sequence. The integrated results demonstrated a high content of total nitrogen in sediments ranging from 1 263.68-7 155.17 mg&middot;kg<sup>-1</sup>. The contents of nitrate nitrogen and ammonium nitrogen were low, which were 10.00-144.00 mg&middot;kg<sup>-1</sup>and 9.20-146.50 mg&middot;kg<sup>-1</sup>, respectively. Organic nitrogen was the main component in the sediments, ranging from 255.80 to 5 644.25 mg&middot;kg<sup>-1</sup>, composing a large average percentage of 91.26%. In addition, the nitrogen pollution of sediment in Dianchi Lake has reached a high level and is becoming serious since 1970s, which surged in the late 1990s. The spatial difference of total nitrogen was obvious, with comparably the most in the south, less in the north and least in the center. The average deposition rate was changing from 0.092 g&middot;(cm<sup>2</sup>&middot;a)<sup>-1</sup>to 0.187 g&middot;(cm<sup>2</sup>&middot;a)<sup>-1</sup>in the last 100 years and increased first, then declined, finally showed a slight upward trend over time. The burial rate of total nitrogen in sediment increased over time and almost grew up straightly after 1990, which decreased from the south to the north of Dianchi Lake in space. It was estimated that the reserves of total nitrogen, organic nitrogen, nitrate nitrogen, ammonium nitrogen in the sediment were 92 139.15 t, 86 745.62 t, 2 464.16 t, 2 929.37 t, respectively, from 1900 to 2014. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Nitrogen
Controlled terms:Deposition rates - Lakes - Nitrates - Pollution - Sediments
Uncontrolled terms:Ammonium nitrogen - Dianchi lakes - Nitrate nitrogen - Nitrogen pollution - Nitrogen species - Organic nitrogen - Spatial differences - Total nitrogen
Classification code:483  Soil Mechanics and Foundations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 1.00e+02yr, Percentage 9.13e+01%
DOI:10.13227/j.hjkx.201605232

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 100>

Accession number:20172603861000
Title:Non-CO<inf>2</inf>Greenhouse Gas Release from Different Biological Wastewater Treatment Processes
Authors:Li, Hui-Juan (1); Peng, Dang-Cong (1); Liu, Wen-Bo (1); Yao, Qian (1); Zhuo, Yang (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1640-1646
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Methane (CH<inf>4</inf>) and nitrous oxide (N<inf>2</inf>O) are two of the most important non-CO<inf>2</inf>greenhouse gases. And municipal sewage treatment plant is an important anthropogenic source of CH<inf>4</inf>and N<inf>2</inf>O. Therefore, it is essential to measure the production and emission of CH<inf>4</inf>and N<inf>2</inf>O during biological wastewater treatment process. The surface emission flux isolation chamber was employed to collect the gas sample from the Xi'an No.3 WWTP (the Orbal oxidation ditch process) and Xi'an NO.4 WWTP (A/A/O process) to determine the contents of methane and nitrous oxide. And the effects of temperature and dissolved oxygen concentration on non-CO<inf>2</inf>greenhouse gases emission from Xi'an NO.4 WWTP were discussed. The results showed that methane and nitrous oxide emission factors from No.3 WWTP were 1 181 mg CH<inf>4</inf>per m<sup>3</sup>influent and 36.20 mg N<inf>2</inf>O per m<sup>3</sup>influent, respectively while those from the No.4 WWTP were 209 mg CH<inf>4</inf>per m<sup>3</sup>influent and 54.64 mg N<inf>2</inf>O per m<sup>3</sup>influent. In addition, the important influencing factors which affected methane and nitrous oxide emission were temperature, aeration strategy, DO, nitrite oxidation rate and specific methanogenic activity. &copy; 2017, Science Press. All right reserved.
Number of references:39
Main heading:Biological water treatment
Controlled terms:Bioremediation - Carbon dioxide - Dissolved oxygen - Greenhouse gases - Methane - Nitrogen oxides - Oxidation - Sewage lagoons - Sewage treatment plants - Temperature  - Wastewater treatment
Uncontrolled terms:A/A/O - Biological treatment - Biological wastewater treatment process - Dissolved oxygen concentrations - Municipal sewage treatment plant - Nitrous oxide - Oxidation ditch - Specific methanogenic activity
Classification code:445.1  Water Treatment Techniques - 451.1  Air Pollution Sources - 452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 454.2  Environmental Impact and Protection - 641.1  Thermodynamics - 802.2  Chemical Reactions - 804.1  Organic Compounds - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201610122

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 101>

Accession number:20172603860977
Title:Efficacy of Phoslock&#9415; on the Reduction of Sediment Phosphorus Release in West Lake, Hangzhou, China
Authors:Zhu, Guang-Wei (1); Li, Jing (1, 2); Zhu, Meng-Yuan (1); Gong, Zhi-Jun (1); Xu, Hai (1); Yang, Gui-Jun (2); Zhang, Yun-Lin (1); Qin, Bo-Qiang (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 and Civil Engineering, Jiangnan University, Wuxi; 214122, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1451-1459
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Famous as the world cultural heritage, West Lake in Hangzhou city has plenty of soft sediments with high organic matter content. To search the countermeasures for internal phosphorus release reduction from the sediment, the sediment core incubation was conducted to understand the efficacy of Phoslock&#9415; on internal phosphorus release in spring, summer and winter, respectively. The results showed that the internal phosphorus release fluxes in winter and spring were relatively low, with averaged values in the entire lake of 0.13 mg&middot;(m<sup>2</sup>&middot;d)<sup>-1</sup>and 0.29 mg&middot;(m<sup>2</sup>&middot;d)<sup>-1</sup>, respectively, while the release flux was 3.29 mg&middot;(m<sup>2</sup>&middot;d)<sup>-1</sup>in summer, more than ten times higher than those in spring and winter. It was estimated that 23.7 kg of phosphorus could be released from sediment in the entire lake every day in summer. Spatially, the phosphorus release flux was related to organic matter contents in sediments, but not the phosphorus or bioavailable phosphorus contents in sediments in West Lake. With Phoslock&#9415; added at the rate of 630 g&middot;m<sup>-2</sup>, sediment phosphorus release was successfully controlled, which reduced the phosphorus concentration in the lake water to less than 0.010 mg&middot;L<sup>-1</sup>. Especially during summer time, the sediment phosphorus release was reduced by 98% after Phoslock&#9415; application. The research suggested that Phoslock&#9415; is powerful for phosphorus control even for sediments with high organic matter content, which could be considered in ecological restoration of WEst Lake. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Phosphorus
Controlled terms:Biogeochemistry - Biological materials - Lakes - Organic compounds - Sediments
Uncontrolled terms:Bioavailable phosphorus - Ecological restoration - Internal loading - Organic matter content - Phosphorus concentration - Phosphorus release - Soft sediments - World cultural heritages
Classification code:461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 483  Soil Mechanics and Foundations - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Mass 2.37e+01kg, Mass_Density 1.00e-05kg/m3, Percentage 9.80e+01%
DOI:10.13227/j.hjkx.201609123

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 102>

Accession number:20172603861003
Title:Dynamic Differences of Uptake and Translocation of Exogenous Selenium by Different Crops and Its Mechanism
Authors:Peng, Qin (1); Li, Zhe (1); Liang, Dong-Li (1, 2); Wang, Meng-Ke (1); Guo, Lu (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 the Agri-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China
Corresponding author:Liang, Dong-Li(dlliang@nwsuaf.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1667-1674
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The study aimed to find out the dynamic changes of selenium (Se) uptake with crops growing and to provide better understanding on the translocation of Se in soil-plant system. Pot experiments and laboratory analysis were carried out, in which 6 crops were planted for eight weeks in the soils treated with selenite and selenate. The results showed that there was a significant difference in the plant dynamic uptake pattern for selenite and selenate. Se concentration in shoots and roots of all tested plants continuously declined with growth since the third week after planting for selenate treatment; while Se concentration in roots of plants gradually increased with the growth, and that for shoots firstly increased and then leveled off or decreased for selenite treatment. Crops could accumulate Se throughout the whole growing period, while 80% of the Se in plants was uptaken in the first 6 weeks. Among the 6 tested plants, the Se concentration in the shoots and roots of mustard was the highest, followed by the shoots of wheat for selenate treatment. The Se concentration in shoots of carrot was the highest, while that in roots was the lowest for selenite treatment. For the same Se treatment, the Se concentrations in both roots and shoots of broccoli, purple cabbage and flowering Chinese cabbage were similar. Broccoli, purple cabbage, flowering Chinese cabbage, mustard and wheat had higher translocation ability to transport selenate than selenite from roots to shoots, whereas carrot had the same ability for translocating selenite and selenate. Biological dilution affected the dynamic changes of the Se content in crops, especially for selenate treatment, and a significant negative correlation between Se concentration of plants and their biomass further verified this. However, the changes of biomass of plants with growing period couldn't explain the total inverse dynamic uptake pattern for selenite and selenate. A significant positive correlation was observed between Se accumulations amount in six crops with available Se changes in soil during the corresponding growing period for selenate treatment, while no such correlation was found for selenite treatment. Se accumulation in crops grown on selenite-treated soil accounted for 0.5%-18.1% of soil available Se, whereas that in selenate treatment was 1.1-4.5 times of soil available Se except for carrot. In conclusion, the dynamic changes of Se uptake with crop growth were the comprehensive results of the absorption and transport capacity of crops, Se availability in soil and biological dilution. It should be considered as a whole in the selenium biofortification. &copy; 2017, Science Press. All right reserved.
Number of references:39
Main heading:Soils
Controlled terms:Crops - Ecology - Selenium - Selenium compounds
Uncontrolled terms:Flowering chinese cabbages - Laboratory analysis - Negative correlation - Positive correlations - Selenate - Selenite - Translocation - Transport capacity
Classification code:454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4  Agricultural Products
Numerical data indexing:Age 1.15e-01yr, Percentage 5.00e-01% to 1.81e+01%, Percentage 8.00e+01%
DOI:10.13227/j.hjkx.201607205

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 103>

Accession number:20172703864538
Title:Adsorption Characteristics of Copper in Water by the Porous Biomorph-Genetic Composite of HAP/C with Eucalyptus Wood Template
Authors:Li, Chao (1, 2); Zhu, Zong-Qiang (1, 2); Cao, Shuang (3); Zhu, Yi-Nian (1, 2); Tan, Xiao (1, 2); Ding, Hui (1, 2)
Author affiliation:(1) Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin; 541004, China; (2) Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin; 541004, China; (3) Henan Electric Power Survey &amp; Design Institute, Zhengzhou; 450007, China
Corresponding author:Zhu, Zong-Qiang(zhuzongqiang@glut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1074-1083
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The specific characteristics and mechanism of adsorption of Cu(II) were studied by using HAP/C composite (PBGC-HAP/C) as adsorbent, and using pH value of the solution system, initial concentration of Cu(II) and particle size of the material as influential factors. The results showed that when the solution was weak acid (pH=5), the adsorption effect was the best; the increase of the initial concentration of the reaction system was not conducive to the enhancement of the adsorption effect; and the decrease of the particle size of the adsorbent facilitated the adsorption process. The pseudo-second-order kinetic model could accurately describe the adsorption process, and the calculated adsorption capacity (0.99, 1.93, 4.03 mg&middot;g<sup>-1</sup>) was close to the experimental measured values (0.99, 1.93, 4.05mg&middot;g<sup>-1</sup>); Langmuir model could fit the adsorption process very well, which indicated that adsorption was monolayer adsorption and the increase of temperature was conducive to adsorption. The thermodynamics test results of &Delta;G<sup>&theta;</sup>&lt;0, &Delta;S<sup>&theta;</sup>&gt;0 and &Delta;H<sup>&theta;</sup>&gt;0 showed that the adsorption process was endothermic and spontaneous. Through comparative analysis of the SEM, EDS, XRD and FTIR of materials before and after adsorption, the results indicated that the chemical complexation reaction of Cu(II) with the oxygen functional groups on the surface of PBGC-HAP/C was the main purification mechanism, which was accompanied with physical adsorption, electrostatic adsorption and ion exchange. &copy; 2017, Science Press. All right reserved.
Number of references:44
Main heading:Adsorption
Controlled terms:Chemical analysis - Complexation - Dynamics - Hydroxyapatite - Ion exchange - Particle size - Thermodynamics
Uncontrolled terms:Adsorption characteristic - Adsorption mechanism - Characteristics and mechanisms - Complexation reaction - Electrostatic adsorption - Oxygen functional groups - Pseudo-second-order kinetic models - Purification mechanisms
Classification code:641.1  Thermodynamics - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201608093

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 104>

Accession number:20172703864558
Title:Effects of Simulated Acid Rain on Soil Respiration and Heterotrophic Respiration in a Secondary Forest
Authors:Chen, Shu-Tao (1, 2); Sun, Lu (2); Sang, Lin (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
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1235-1244
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to investigate the effects of simulated acid rain on soil respiration and heterotrophic respiration in a secondary forest, a field experiment was carried out. A split-plot experiment was arranged in field. There were 4 blocks; each block had two main plots which were trenched and un-trenched plots. In each main plot, 4 simulated acid rain treatments of control (CK), pH 4.0 (A1), pH 3.0 (A2), and pH 2.0 (A3) were randomly assigned. Soil respiration in the un-trenched plots and heterotrophic respiration in the trenched plots were measured weekly. Soil temperature and moisture at a depth of 5 cm were measured during the respiration measurements. The results indicated that different simulated acid rain treatments exhibited similar seasonal patterns of soil respiration and heterotrophic respiration. Heterotrophic respiration in the trenched plots was significantly lower than soil respiration in the un-trenched plots. The annual mean soil respiration rates for the CK, A1, A2, and A3 treatments in the un-trenched plots were (2.47&plusmn;0.31), (2.52&plusmn;0.22), (2.38&plusmn;0.17), and (2.43&plusmn;0.22) &mu;mol&middot;(m<sup>2</sup>&middot;s)<sup>-1</sup>, respectively, while the annual mean heterotrophic respiration rates for the 4 treatments in the trenched plots were (1.55&plusmn;0.10), (1.65&plusmn;0.22), (1.77&plusmn;0.08), and (1.78&plusmn;0.27) &mu;mol&middot;(m<sup>2</sup>&middot;s)<sup>-1</sup>, respectively. ANOVA showed that simulated acid rain had no significant effects on soil respiration in the un-trenched plots and heterotrophic respiration in the trenched plots. Regression analysis suggested that there was a significant linear regression relationship between soil respiration and heterotrophic respiration. Simulated acid rain significantly (P&lt;0.001) decreased the ratio of soil respiration to heterotrophic respiration. Soil temperature was the main controlling factor regulating the seasonal patterns of soil respiration and heterotrophic respiration for each of the SAR treatment, while soil moisture had no significant effects on the seasonal variability in soil respiration and heterotrophic respiration. &copy; 2017, Science Press. All right reserved.
Number of references:40
Main heading:Soil surveys
Controlled terms:Acid rain - Forestry - Moisture - Rain - Regression analysis - Soil moisture - Soils - Temperature
Uncontrolled terms:Heterotrophic respiration - Secondary forests - Simulated acid rains - Soil respiration - Soil temperature
Classification code:443.3  Precipitation - 451.1  Air Pollution Sources - 483.1  Soils and Soil Mechanics - 641.1  Thermodynamics - 922.2  Mathematical Statistics
Numerical data indexing:Size 5.00e-02m
DOI:10.13227/j.hjkx.201608206

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 105>

Accession number:20172703864534
Title:Effects of Pretreatment on Hydraulic Irreversible Membrane Fouling During Ultrafiltration Short Process: A Pilot Study
Authors:Yang, Hai-Yan (1, 2); Xing, Jia-Jian (2); Wang, Can (3); Sun, Guo-Sheng (1); Zhao, Yan (1); Liang, Heng (2); Xu, Ye-Qin (1); Li, Gui-Bai (2)
Author affiliation:(1) Guangdong GDH Water Co., Ltd., Shenzhen; 518021, China; (2) School of Environmental and Municipal Engineering, Harbin Institute of Technology, Harbin; 150090, China; (3) School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao; 266033, China
Corresponding author:Li, Gui-Bai(liguibai@vip.163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1046-1053
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Pilot-scale performances for ultrafiltration of Dongjiang river water without and with micro-coagulation and coagulation-adsorption-sedimentation pretreatments were conducted to investigate the effects of pretreatments on hydraulic irreversible fouling of ultrafiltration short processes. Scanning electron microscope (SEM) imaging, high performance size exclusion chromatography (HPSEC) and fluorescence excitation-emission matrix (EEM) were employed to identify foulants responsible for irreversible fouling during ultrafiltration with and without pretreatments. The results showed that the hydraulic irreversible fouling rate was 0.16 kPa&middot;d<sup>-1</sup>with micro-coagulation pretreatment at 10 L&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>, while the rate without pretreatment was 0.32 kPa&middot;d<sup>-1</sup>at the same flux. Meanwhile, the fouling rate with coagulation-adsorption-sedimentation pretreatment was almost zero at the same flux. Furthermore, when the flux increased to 17 L&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>, the irreversible fouling was not observable with coagulation-adsorption-sedimentation pretreatment (backwashing every 24 hours). Properties of foulants from external membrane and internal membrane after backwashing showed that the protein-like and fulvic-like substances were responsible for irreversible fouling in Dongjiang river water. Furthermore, structural alteration of cake layer resulted in less cake resistance and higher backwash efficiency after micro-coagulation pretreatment, leading to less irreversible fouling. Coagulation-adsorption-sedimentation pretreatment decreased irreversible fouling with higher removal efficiency of protein-like and fulvic substances, which were the foulants responsible for irreversible fouling during ultrafiltration. Both micro-coagulation and coagulation-adsorption-sedimentation pretreatments decreased irreversible fouling during ultrafiltration short process. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Fouling
Controlled terms:Adsorption - Coagulation - Efficiency - Membrane fouling - Proteins - Scanning electron microscopy - Sedimentation - Size exclusion chromatography - Ultrafiltration - Water resources
Uncontrolled terms:Fluorescence excitation emission matrix - High performance size exclusion chromatography - Irreversible fouling - Low flux - Membrane foulants - Pre-Treatment - Removal efficiencies - Structural alterations
Classification code:444  Water Resources - 801  Chemistry - 802.3  Chemical Operations - 804.1  Organic Compounds - 913.1  Production Engineering - 951  Materials Science
Numerical data indexing:Time 8.64e+04s
DOI:10.13227/j.hjkx.201608028

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 106>

Accession number:20171003409557
Title:Effect of zero valent iron on the decline of tetracycline resistance genes and class 1 integrons during thermophilic anaerobic digestion of sludge
Authors:Wei, Xin (1); Xue, Shun-Li (1); Yang, Fan (1); Li, Xiang (1); Liu, Zhen-Hong (1); Xue, Gang (1); Gao, Pin (1)
Author affiliation:(1) State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China
Corresponding author:Gao, Pin(pingao@dhu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:697-702
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the effects of zero valent iron (Fe<sup>0</sup>) on the decline of antibiotic resistance genes during thermophilic anaerobic digestion of sludge, the abundances of seven tetracycline resistance genes (TC-ARGs, including tetA, tetC, tetG, tetM, tetO, tetW, and tetX) and class 1 integron gene (intI1) were quantified by quantitative PCR (qPCR). Also, the concentrations of volatile fatty acids (VFAs) were determined. The correlations between the abundances of TC-ARGs and intI1 gene and the concentrations of VFAs were discussed. The results showed that appropriate dose of Fe<sup>0</sup>such as 0.10 g&middot;g<sup>-1</sup>VSS could enhance the anaerobic digestion process of sludge, and the production of total VFAs and acetic acid increased significantly. The decrease in the abundances of TC-ARGs and intI1 gene was also enhanced. However, excessive Fe<sup>0</sup>such as 1.17 g&middot;g<sup>-1</sup>VSS could not further improve the reduction in the abundances of TC-ARGs and intI1 gene, probably resulted from the occurrence of horizontal gene transfer. The abundances of TC-ARGs except tetO gene, as well as intI1 gene exhibited significant negative correlation with the concentration of acetic acid, indicating that acetic acid probably had an enhanced effect on the decline of TC-ARGs and intI1 gene during thermophilic anaerobic digestion of sludge. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Anaerobic digestion
Controlled terms:Acetic acid - Fatty acids - Gene transfer - Genes - Iron - Organic acids - pH - Polymerase chain reaction - Sludge digestion - Volatile fatty acids
Uncontrolled terms:Anaerobic digestion process - Antibiotic resistance genes - Class 1 integrons - Concentration of acetic acid - Resistance genes - Thermophilic anaerobic digestion - Volatile fatty acids (VFAs) - Zero-valent iron
Classification code:452.2  Sewage Treatment - 461.2  Biological Materials and Tissue Engineering - 461.8.1  Genetic Engineering - 545.1  Iron - 801.1  Chemistry, General - 801.2  Biochemistry - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201607235

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 107>

Accession number:20171003416391
Title:Comparisons between seasonal and diurnal patterns of cave air CO<inf>2</inf>and Control Factors in Jiguan Cave, Henan Province, China
Authors:Zhang, Ping (1, 2, 3); Yang, Yan (1, 2, 3); Sun, Zhe (1, 2, 3); Liang, Sha (1, 2, 3); Zhang, Na (1, 2, 3); Tian, Ning (1, 2, 3); Li, Jian-Cang (4); Ling, Xin-You (4); Zhang, Zhi-Qin (4)
Author affiliation:(1) Key Laboratory of Eco-Environment in Three Gorges Reservoir Region, School of Geographical Sciences, Southwest University, Chongqing; 400715, China; (2) Field Scientific Observation &amp; Research Base of Karst Eco-environments at Nanchuan in Chongqing, Ministry of Land and Resources of China, Chongqing; 408435, China; (3) Opening Laboratory of Karst Environment, Southwest University, Chongqing; 400715, China; (4) Administrative Office of Luoyang Jiguan, Luanchuan; 471500, China
Corresponding author:Yang, Yan(yy2954@gmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:60-69
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Cave air CO<inf>2</inf>makes notable impacts on the deposition and dissolution of speleothem, affecting the stability of carbonate landscape and comfort of tourist in show caves. Cave air CO<inf>2</inf>is a key factor of karstification occurrence. Studying the mechanism of cave air CO<inf>2</inf>variation is important for understanding the pattern of karstification and cave protection. In order to understand the temporal and spatial variation characteristics and its possible controlling factors, inside and outside cave air CO<inf>2</inf>, hydrogeochemical index, temperature, relative humidity as well as precipitation and tourist amount were observed in the Jiguan Cave, which lies in the west Henan Province of south-north geographical boundary of China. Nearly five years monitoring of air CO<inf>2</inf>of Jiguan Cave was carried out from December, 2011 to May, 2016. A diurnal monitoring was performed from 19 May, 2016 to 20 May, 2016. The results indicated that the cave air CO<inf>2</inf>showed notable spatial and seasonal variations. &#9312;From the spatial variation, the sites closer to cave entrances, affected by strong cave ventilation, had lower pCO<inf>2</inf>. In addition, the special structure of Jiguan Cave and soil air pCO<inf>2</inf>variation, vegetation respiration and soil microbial activity, which in turn were associated with changes in climate and environment also contributed to the variation of cave air pCO<inf>2</inf>. &#9313; On a seasonal scale, cave air CO<inf>2</inf>was higher in summer and lower in winter. This variation of cave air CO<inf>2</inf>was mainly influenced by tourism activity as well as karstification. &#9314;Tourist amount was the mainly factor that influenced the variation of cave air CO<inf>2</inf>on a daily scale. Because of tourism activity, cave air CO<inf>2</inf>was increased, and also cave environment was disturbed. All of these intimidate the better conservation of cave environment. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Carbon dioxide
Controlled terms:Caves - Humidity control
Uncontrolled terms:Control factors - Controlling factors - Diurnal variation - Seasonal variation - Soil microbial activities - Spatial variations - Temporal and spatial variation - Tourism activities
Classification code:481.1  Geology - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201606211

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 108>

Accession number:20171003409550
Title:Characteristics and mechanism of hybrid ozonation-coagulation process in wastewater reclamation
Authors:Hou, Rui (1); Jin, Xin (1); Jin, Peng-Kang (1); Wang, Xiao-Chang (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Corresponding author:Jin, Peng-Kang(pkjin@hotmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:640-646
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Because of the limited dissolved organic matter removal efficiency in conventional pre-ozonation-coagulation process, the hybrid ozonation-coagulation (HOC) process was developed for wastewater reclamation in this study. In this process, coagulation and ozonation could synchronize within a single unit. Compared with the pre-ozonation-coagulation process and traditional coagulation process at the same coagulants dosage, the HOC process exhibited higher treatment efficiency, especially better organic matter removal performance at each pH value, which were 37.96% and 39.66%, respectively. In order to obtain the removal mechanism of dissolved organic matters by HOC process, ozone decomposition at two pH values either with or without AlCl<inf>3</inf>&middot;6H<inf>2</inf>O was monitored in this study. The results showed that higher pH and the addition of coagulant could accelerate ozone decay. In addition, para-chlorobenzoic acid (p-CBA) was chosen as the hydroxyl radical (&middot;OH) probe compound to indirectly calculate the &middot;OH exposure. The results revealed that the HOC process was involved in &middot;OH reaction and coagulant could promote ozone decomposition due to its enhancing effect on &middot;OH production during the ozonation process. Furthermore, the ozone depletion occurred more quickly at high pH due to its reaction with hydroxide ions (OH<sup>-</sup>), leading to the formation of &middot;OH through a series of chain reactions. Moreover, the effects of tert-butanol, a well-known &middot;OH inhibitor on ozone decay and p-CBA decomposition were also investigated. The results indicated that ozone depletion and p-CBA decomposition were significantly inhibited by tert-butanol, which further proved that ozone was decomposed into &middot;OH radicals through chain reactions. In the HOC process, Al-based coagulants and hydrolyzed products could act as catalysts to enhance ozone decomposition into &middot;OH which is a powerful oxidant to improve the organics removal efficiency. &copy; 2017, Science Press. All right reserved.
Number of references:51
Main heading:Wastewater reclamation
Controlled terms:Biogeochemistry - Biological materials - Chains - Chemicals removal (water treatment) - Coagulation - Efficiency - Free radicals - Organic compounds - Ozone - Ozone layer  - Ozone water treatment - Ozonization - pH - Wastewater treatment
Uncontrolled terms:Characteristics and mechanisms - Coagulation process - Dissolved organic matters - Hydrolyzed products - Hydroxyl radicals - Organic matter removal - Ozone decomposition - Treatment efficiency
Classification code:452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 602.1  Mechanical Drives - 801.1  Chemistry, General - 801.2  Biochemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 913.1  Production Engineering
Numerical data indexing:Percentage 3.80e+01%, Percentage 3.97e+01%
DOI:10.13227/j.hjkx.201607195

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 109>

Accession number:20171003409524
Title:Atmospheric dry deposition fluxes and seasonal variations of particulate matter and lead in urban Beijing
Authors:Yao, Li (1); Liu, Jin (1, 2); Pan, Yue-Peng (1); Tian, Shi-Li (1); Wang, Zhen-Bo (3); Wei, Xia (4); Zhang, Guo-Zhong (1); Zhou, Bao-Hua (2); Wang, Yue-Si (1)
Author affiliation:(1) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (2) School of Resources and Environment, University of Ji'nan, Ji'nan; 250022, China; (3) Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (4) Yunnan Meteorological Bureau, Kunming; 650000, China
Corresponding author:Pan, Yue-Peng(panyuepeng@mail.iap.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:423-428
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the dry deposition pattern of particulate matter and lead in urban Beijing, dry deposited particles were collected based on a surrogate surface between December 2013 and November 2014 and subjected to elemental analysis by using microwave digestion and inductively coupled plasma mass spectrometry. The results showed that dry deposition fluxes of particle mass and total lead were 0.84 t&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>and 7.56 mg&middot;(m<sup>2</sup>&middot;a)<sup>-1</sup>, respectively, with a seasonal trend of spring&gt;winter&gt;autumn~summer, exhibiting a similar temporal pattern to that of coarse particles. In addition, dry deposition flux of water-soluble lead was 3.14 mg&middot;(m<sup>2</sup>&middot;a)<sup>-1</sup>. It was found that the ratio of soluble fraction to total lead in dry deposited particles reached up to 43%, coinciding with a seasonal variation of ambient sulfur dioxide. The findings highlighted the anthropogenic imprints on the dry deposition flux of particles and heavy metals as well as the solubility of lead. This study also provides a first-hand dataset that can be used to assess ecological and environmental impacts of dry deposited lead, and an up-to-date scientific basis for the crafting abatement strategies to further reduce emission of heavy metals in China. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Particles (particulate matter)
Controlled terms:Air pollution - Deposition - Environmental impact - Heavy metals - Lead - Mass spectrometry - Solubility - Sulfur dioxide
Uncontrolled terms:Atmospheric dry deposition - Dry deposition - Dry deposition fluxes - Microwave digestion - Particulate Matter - Seasonal variation - Similar temporal patterns - Surrogate surfaces
Classification code:451  Air Pollution - 454.2  Environmental Impact and Protection - 531  Metallurgy and Metallography - 546.1  Lead and Alloys - 801  Chemistry - 801.4  Physical Chemistry - 802.3  Chemical Operations - 804.2  Inorganic Compounds - 951  Materials Science
Numerical data indexing:Percentage 4.30e+01%
DOI:10.13227/j.hjkx.201601132

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 110>

Accession number:20171003409525
Title:Pollution characteristics of heavy metals in PM<inf>2.5</inf>and their human health risks among the coastal city group along western Taiwan Straits Region, China
Authors:Chen, Yan-Ting (1, 2); Du, Wen-Jiao (1, 2, 3); Chen, Jin-Sheng (1, 2); Xu, Ling-Ling (1, 2)
Author affiliation:(1) Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (2) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Chen, Jin-Sheng(jschen@iue.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:429-437
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:PM<inf>2.5</inf>samples were collected from 11 sampling sites in the coastal city group along western Taiwan Straits region, China, and these heavy metal elements (Zn, Cu, Pb, Ni, Cr, As) were detected using particle-induced X-ray emission (PIXE) method. The pollution characteristics, enrichment factors and source apportionment of heavy metals in PM<inf>2.5</inf>were analyzed, and furthermore, their human health risks were determined. The result showed concentration distribution was obviously different between PM<inf>2.5</inf>and heavy metals in the city group, for the main sources (e.g. construction dust and ground dust) for PM<inf>2.5</inf>were not the main contribution to these heavy metals. The enrichment factors of Zn, Cu, Pb, Mn, Ni, Cr, As exceeded 10, which suggested these metals were enriched and significantly impacted by anthropogenic pollution. Three main groups of heavy metals in PM<inf>2.5</inf>were identified by principal component analysis (PCA-MLR), such as coal combustion and traffic emissions (70.59%), multiple sources (coal and oil combustion, pyrometallurgical process, 17.55%) and other industry (11.86%). The risk levels for carcinogenic heavy metals (Ni, Cr, As) and non-carcinogenic heavy metals (Zn, Cu, Pb, Mn) were lower than the average level of risk acceptance (10<sup>-6</sup>), which suggested these heavy metals did not cause harm to human health in these cities. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Copper
Controlled terms:Air pollution - Coal combustion - Coal industry - Dust - Health - Health risks - Heavy metals - Ion beams - Lead - Manganese  - Nickel - Pollution - Principal component analysis - Pyrometallurgy - Risk assessment - Trace elements - Zinc
Uncontrolled terms:Anthropogenic pollution - Concentration distributions - Enrichment factors - Human health - Particle induced X-ray emission - Pyro-metallurgical process - Taiwan Straits - Trace heavy metals
Classification code:451  Air Pollution - 451.1  Air Pollution Sources - 461.6  Medicine and Pharmacology - 461.7  Health Care - 503  Mines and Mining, Coal - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 531  Metallurgy and Metallography - 531.1  Metallurgy - 543.2  Manganese and Alloys - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics - 932.1  High Energy Physics
Numerical data indexing:Percentage 1.19e+01%, Percentage 1.76e+01%, Percentage 7.06e+01%
DOI:10.13227/j.hjkx.201606077

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 111>

Accession number:20171003416406
Title:Effects of UV radiation on the coagulation process of kaolin and involved mechanisms
Authors:Wang, Wen-Dong (1, 2); Wang, Chang-Xin (1); Liu, Hui (1); Han, Yu (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China; (2) Department of Environmental Technology and Ecology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing; 314006, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:188-194
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Kaolin commonly exists in water, and it has an important impact on the water treatment processes and contaminants'migration and transformation. In this study, PAC was used as flocculating agent to systematically investigate the effects of UV radiation on the coagulation process of kaolin by jar test. The results showed that under neutral and acidic conditions, UV radiation could promote the coagulation process of kaolin suspension. When the solution pH, coagulant dosage and irradiation time were 7.0, 30 mg&middot;L<sup>-1</sup>and 2.0 h, respectively, the kaolin remove rate of effluent after coagulation increased from 81.05% to 93.90% by using UV radiation. This might be related to the decrease of -OH stretching vibration absorption peak and the enhancement of Si-O stretching vibration absorption peak and Si-O bending vibration absorption peak after UV radiation, so that the number of the active spot(-OH)on kaolin surface declined. These changes might lead to decrease of the negative charge on kaolin surface, which promoted kaolin suspension to precipitate in coagulation process. However, under alkaline conditions, its settlement performance was slightly lower than the water samples without ultraviolet radiation treatment. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Chemical water treatment
Controlled terms:Alkalinity - Coagulation - Effluents - Kaolin - Radiation - Radiation effects - Stretching - Ultraviolet radiation - Water treatment - Zeta potential
Uncontrolled terms:Alkaline conditions - Coagulation process - Flocculating agents - Fourier transform infra reds - Kaolin suspensions - OH stretching vibrations - Stretching vibrations - Water treatment process
Classification code:445.1  Water Treatment Techniques - 452.3  Industrial Wastes - 482.2  Minerals - 535.2  Metal Forming - 741.1  Light/Optics - 801.1  Chemistry, General - 801.3  Colloid Chemistry - 802.3  Chemical Operations
Numerical data indexing:Mass_Density 3.00e-02kg/m3, Percentage 8.10e+01% to 9.39e+01%, Time 7.20e+03s
DOI:10.13227/j.hjkx.201606114

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 112>

Accession number:20171003409572
Title:Effects of nitrogen application on selenium uptake, translocation and distribution in winter wheat
Authors:Chen, Yu-Peng (1, 3); Peng, Qin (1); Liang, Dong-Li (1, 2); Song, Wei-Wei (1); Lei, Ling-Ming (1); Yu, Da-Song (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 the Agri-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China; (3) College of Urban and Rural Construction, Shanxi Agricultural University, Taigu; 030801, China
Corresponding author:Liang, Dong-Li(dongliliang2005@yahoo.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:825-831
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to better understand the effects of nitrogen application on accumulation, translocation and distribution of selenium in winter wheat and to provide theoretical reference for reasonable nitrogen application and increasing selenium content of grains. A pot experiment was carried out under greenhouse conditions with Se1 (0.74 mg&middot;kg<sup>-1</sup>) or Se2 (2.60 mg&middot;kg<sup>-1</sup>) levels of selenium, and each Se treatment was supplied with N1 (100 mg&middot;kg<sup>-1</sup>) or N2 (200 mg&middot;kg<sup>-1</sup>) levels of nitrogen, respectively. Selenium concentrations and biomass amounts of different parts of wheat were determined at jointing and maturity stage. The results showed that grain yield increased with increasing nitrogen levels by 13.2% and 24.0% in Se1 and Se2 treatment, respectively. Regardless of N rate, Se concentration of wheat increased with raising Se amended rate (P&lt;0.01). Increasing nitrogen application could promote Se uptake of root and thus increase the selenium concentration of wheat grains and leaves, which was greater in Se1 treatment than in Se2 treatments. Se concentrations in wheat grain increased by 22.6% and 12.1% with the increasing N application rate in low and high Se treatment, respectively. The distribution ratios of Se in each organ ranked the same as BCFs, following the order of leaf&gt;grain&gt;glume&gt;root. Increasing N fertilization increased the distribution ratio of Se in grains by 11.1% and 25.9% in low and high selenate treatments, respectively. High nitrogen fertilization could promote uptake and translocation of Se in wheat under low Se conditions, and improve Se use efficiency as well in the agricultural production. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Grain (agricultural product)
Controlled terms:Agriculture - Crops - Nitrogen - Nitrogen fertilizers - Selenium - Selenium compounds - Transportation
Uncontrolled terms:Accumulation - Agricultural productions - Application rates - Distribution - Distribution ratio - Greenhouse conditions - Selenium concentrations - Wheat
Classification code: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 - 821.4  Agricultural Products
Numerical data indexing:Percentage 1.11e+01%, Percentage 1.21e+01%, Percentage 1.32e+01%, Percentage 2.26e+01%, Percentage 2.40e+01%, Percentage 2.59e+01%
DOI:10.13227/j.hjkx.201607194

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 113>

Accession number:20171003416428
Title:Screening of the reduction/stabilization reagent for Cr(VI) contaminated soil in a planting site and reaction process monitoring
Authors:Li, Pei-Zhong (1); L&uuml;, Xiao-Jian (2); Wang, Hai-Jian (1); Yang, Su-Cai (1); Wei, Wen-Xia (1); Song, Yun (1)
Author affiliation:(1) Beijing Key Laboratory of Industrial Land Contamination and Remediation, Environmental Protection Research Institute of Light Industry, Beijing; 100089, China; (2) College of Exploration Technology and Engineering, Hebei Dizhi University, Shijiazhuang; 050031, China
Corresponding author:Song, Yun(liepi_song@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:368-373
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:There are lots of problems in the domestic remediation of Cr(VI) contaminated soil field, such as lack of the key processing parameters, poor long-term effect and so on. The Cr(VI) heavy polluted surface soil was sampled from an electroplating site in North-China, and then treated with five different reducing reagents. At the same time, the on-line ORP probes and interval sampling test were chosen to monitor the reaction process, and to explore the reaction rate and effect. The results showed that No.4 reagent had the highest Cr(VI) reduction effect, reaching up to 99.5%, and the minimum soil Cr(VI) concentration could reach 2.4 mg&middot;kg<sup>-1</sup>. The No.1 and No.4 reagents had relatively faster reducing rates. There were obvious difference in ORP and pH monitoring values between different reductants, for example, the No.1 reagent kept the ORP value stable at around -400 mV. The No.4 reagent gradually increased the value from -200 mV to 100 mV since 30h, and then kept stable. According to the pH difference among different reductants, the No.4 reagent was the best and kept the pH value at around 7. Taking together the final effect and process key parameters, the No.4 reagent was the best. The scale-up experiment was operated with process monitoring, and the ORP and conductivity values showed that the reduction reaction took about 160 h. This work would provide theoretical basis for controlling the maintenance condition and reaction process in soil Cr(VI) remediation. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Soil pollution
Controlled terms:Chemical reactions - Chromium compounds - Heavy metals - Pollution - Process control - Process monitoring - Reduction - Remediation - Soil conservation - Soils  - Stabilization
Uncontrolled terms:Contaminated soils - Electroplating sites - Hexavalent chromium - Processing parameters - Reducing reagents - Reduction reaction - Scale-up experiment - Soil remediation
Classification code:454.2  Environmental Impact and Protection - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 802.2  Chemical Reactions - 913.1  Production Engineering
Numerical data indexing:Percentage 9.95e+01%, Time 1.08e+05s, Time 5.76e+05s, Voltage -2.00e-01V to 1.00e-01V, Voltage -4.00e-01V
DOI:10.13227/j.hjkx.201604098

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 114>

Accession number:20171003416400
Title:Characteristics of nitrogen and phosphorus emissions in the gufu river small watershed of the three georges reservoir area
Authors:Hua, Ling-Ling (1); Li, Wen-Chao (1); Zhai, Li-Mei (1); Cui, Chao (1); Liu, Hong-Bin (1); Ren, Tian-Zhi (2); Zhang, Fu-Lin (3); Lei, Qiu-Liang (1)
Author affiliation:(1) Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing; 100081, China; (2) Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin; 300191, China; (3) Institute of Plant Protection, Soil and Fertilizer Sciences, Hubei Academy of Agricultural Sciences, Wuhan; 430064, China
Corresponding author:Zhai, Li-Mei(zhailimei@caas.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:138-146
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To study the seasonal change characteristics and form composition of nitrogen and phosphorus output concentration and pollutant discharge load with rainfall characteristics at the outlet of Gufu river small watershed, the quality and quantity of water combined with natural rainfall events were monitored from January to December 2014. The results showed that the annual runoff volume of the Gufu river small watershed was 0.6&times;10<sup>8</sup>m<sup>3</sup>. The runoff was concentrated in raining season (from July to September), accounting for 63.9%. There was significant(P&lt;0.01) positive correlation between the runoff flow and the annual rainfall. The annual emission of total nitrogen (TN) was 1 432 t&middot;a<sup>-1</sup>, and the emission was 853 t&middot;a<sup>-1</sup>during the raining season, accounting for 59.6% of annual TN emission content. The dissolved nitrogen was the main form of nitrogen emission, and the emission load of each month accounted for 55.4%-91.3% of TN. The positive correlation between the nitrate nitrogen concentration and rainfall was significant (P&lt;0.05). The annual emission of total phosphorus (TP) was 563.1 t&middot;a<sup>-1</sup>, and the content during the raining season accounted for 78.6% of TP annual emission content. The particle phosphorus (PP) was the main form of phosphorus emission, and the emission load of each month accounted for 41.9%-79.5% of TP. There was significant(P&lt;0.01) positive correlation between the annual rainfall, sediment and TP, PP. The correlation between the total dissolved phosphorus concentration and rainfall was significant (P&lt;0.05). &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:River pollution
Controlled terms:Nitrogen - Phosphorus - Pollution - Rain - Reservoirs (water) - Rivers - Runoff - Water pollution - Watersheds
Uncontrolled terms:Nitrogen and phosphorus - Nonpoint pollutions - Output concentrations - Positive correlations - Rainfall characteristics - Small watersheds - Three Georges reservoir - Total dissolved phosphorus
Classification code:441.2  Reservoirs - 443.3  Precipitation - 444.1  Surface Water - 453  Water Pollution - 804  Chemical Products Generally
Numerical data indexing:Percentage 4.19e+01% to 7.95e+01%, Percentage 5.54e+01% to 9.13e+01%, Percentage 5.96e+01%, Percentage 6.39e+01%, Percentage 7.86e+01%
DOI:10.13227/j.hjkx.201606210

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 115>

Accession number:20172603860964
Title:Community Characteristics of Cultivable Bacteria in Fine Particles(PM<inf>2.5</inf>) of Beijing and Baoding
Authors:Hu, Ya-Dong (1, 2); Ma, An-Zhou (1); L&uuml;, Peng-Yi (1, 3); Zhang, Yang (1); Zhuang, Guo-Qiang (1)
Author affiliation:(1) Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Resource and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Chemical &amp; Environmental Engineering, China University of Mining and Technology(Beijing), Beijing; 100083, China
Corresponding author:Zhuang, Guo-Qiang(gqzhuang@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1327-1339
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Fine particles(PM<inf>2.5</inf>) collected by two middle volume air samplers in the suburbs of Baoding and the urban area of Beijing during Jan 10<sup>th</sup>to 17<sup>th</sup>, 2015, were used to compare the community characteristics of cultivable bacteria in the two sites. In this study, we observed the particle morphology of PM<inf>2.5</inf>using a field emission scanning electron microscope (FESEM), analyzed the air mass transportation source of the two sampling sites by the NOAA/ARL HYSPLIT-4 backward trajectory model, and measured the concentrations of the major water-soluble ions and heavy metal elements in the PM<inf>2.5</inf>samples using ion chromatography, continuous flow analyzer and ICP-MS. The results indicated that, the cultivable bacteria of PM<inf>2.5</inf>contained three phyla, which were Firmicutes, Actinobacteria and &alpha;-Proteobacteria. Nine genera and 17 species of cultivable airborne bacteria were isolated and identified. The most abundant phylum was Firmicutes. The Gram-positive bacteria accounted for more than 90%. The spore-forming Bacillus which was the dominant species contributed 68.15% and 75% to the total bacteria in urban Beijing and the suburbs of Baoding, respectively. The difference in the community structure of PM<inf>2.5</inf>'s cultivable bacteria in the two sampling areas may be affected by PM<inf>2.5</inf>'s physical and chemical properties and air mass transportation. &copy; 2017, Science Press. All right reserved.
Number of references:53
Main heading:Bacteria
Controlled terms:Bacteriology - Chromatography - Correlation methods - Heavy metals - Ion chromatography - Mass transportation - Scanning electron microscopy - Urban growth
Uncontrolled terms:Air mass - Community structures - Cultivable bacteria - Field emission scanning electron microscopes - Gram-positive bacterium - Particle morphologies - Physical and chemical properties - Spore
Classification code:403.1  Urban Planning and Development - 531  Metallurgy and Metallography - 801  Chemistry - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 6.82e+01%, Percentage 9.00e+01%
DOI:10.13227/j.hjkx.201603224

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 116>

Accession number:20172603861006
Title:Effect of Sediments on Bioaccumulation of Mercury in Fish Body in the Water-Level-Fluctuating Zone of the Three Gorges Reservoir Area
Authors:Sun, Song (1); Li, Chu-Xian (1); Zhang, Cheng (1, 2, 3); Wang, Yong-Min (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:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1689-1696
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Mercury (Hg) in the aquatic environment is easy to accumulate in fish. In order to study the effect of the sediments on Hg accumulation in fish in the water-level-fluctuation zone of the Three Gorges Reservoir, we conducted a 90-days simulated flooding experiment by using the sediments with different concentrations of Hg. Our study showed that the concentrations of the total mercury (THg) and methyl mercury (MeHg) in the overlying water increased after flooding, and the concentrations in the muscle of fish kept increasing in the period of experiment, the concentrations in the viscera and head increased in the earlier period but seemingly decreased in the later period. The bioaccumulated Hg content in the fresh was higher than that in the viscera and head, between which there was no significant difference. Compared with the control group (no sediment), the presence of sediments obviously increased the content of Hg bioaccumulated in fish, and the bioaccumulated Hg level increased with the Hg concentrations in sediment. The THg and MeHg in different fish parts presented a similar variation trend with the BCF ranging 1.93&times;10<sup>5</sup>-8.89&times;10<sup>5</sup>for MeHg and 1.3&times;10<sup>3</sup>-12.8&times;10<sup>3</sup>for inorganic mercury, indicating that MeHg was more prone to accumulate in fish. The MeHg in fish was significantly related with THg, and accumulated MeHg occupied about 80.1% (muscle), 79.3% (visceral) and 66.7% (head) of increased THg. After the reflooding of the sediment in the water-level-fluctuating zone, net methylation could occur with MeHg as the product, and then MeHg would diffuse to overlay water, further increasing the Hg bioaccumulation in fish. Therefore, the potential pollution risk of Hg in the water-level-fluctuationg zone with large area of the Three Gorges Reservoir cannot be ignored. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Reservoirs (water)
Controlled terms:Alkylation - Bioaccumulation - Biochemistry - Fish - Floods - Mercury (metal) - Muscle - Sediments - Water pollution
Uncontrolled terms:Aquatic environments - Inorganic mercury - Mercury in fishes - Methyl mercury - Potential pollutions - Three gorges reservoir - Three gorges reservoir area - Water-level-fluctuation zones
Classification code:441.2  Reservoirs - 453  Water Pollution - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 483  Soil Mechanics and Foundations - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2  Biochemistry - 802.2  Chemical Reactions
Numerical data indexing:Age 2.47e-01yr, Percentage 6.67e+01%, Percentage 7.93e+01%, Percentage 8.01e+01%
DOI:10.13227/j.hjkx.201609006

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 117>

Accession number:20172603860993
Title:Accumulation and Migration Characteristics in Soil Profiles and Bioavailability of Heavy Metals from Livestock Manure
Authors:He, Meng-Yuan (1); Dong, Tong-Xi (1); Ru, Shu-Hua (2); Su, De-Chun (1)
Author affiliation:(1) College of Resources and Environment Science, China Agricultural University, Beijing; 100193, China; (2) Institute of Agro-resource and Environment, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang; 050051, China
Corresponding author:Su, De-Chun(dcsu@cau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1576-1586
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The long term and high dosage application of livestock manure may result in heavy metal accumulation and migration in the soil, which may endanger food security and affect the top soil heavy metal environmental capacity. Thus, one of the most important tasks for prevention of soil heavy metal pollution is scientific determination of the safe use load of heavy metals in livestock manure. A 4-year field plot experiment was carried out to quantitatively study the accumulation and migration characteristics of heavy metals from pig and chicken manure in soil profiles and the differences of bioavailability. The results showed that the contents of Cu and Cd increased significantly by 43.8%-118.6% and 28.2%-44.9% in topsoil(0-15 cm) after 4-consecutive year application of pig manure, and the contents of Cu, Zn, Cd, Cr, As, Pb also increased by 29.7%-48.5%, 239%-456%, 19.9%-80.8%, 40.4%-163%,11.8%-22.0% and 80.3%~95.0% obviously after application of chicken manure. The accumulation rates of Cu and Zn in topsoil were 76.4%-119% and 14.2%-20.4% with pig manure, 72.1%-88.7% and 63.9%-78.9% with chicken manure. Under a high dosage of pig and chicken manure, Cu and Zn migrated to a deeper soil evidently. Applying 60 t&middot;hm<sup>-2</sup>of pig manure after 4-consecutive year, Cu could migrate to 15-30 cm soil layer, Zn migrated to 30-60 cm soil layer with chicken manure. Except topsoil, the contents of Cr, Cd, As, Pb did not significantly increase in other soil layers. 4-year continuous application of chicken manure significantly decreased the contents of Cu and Cd, but increased the contents of Zn and Cr in wheat grain and the content of Zn in wheat straw. Pig manure significantly decreased the content of Zn in wheat grain, but increased As content with 60 t&middot;hm<sup>-2</sup>, the contents of Cu and As in wheat straw also increased significantly. Besides, the cumulative rate of heavy metals in wheat was no more than 6%, wheat grain carried out more Cu, Zn than straw, but the Cd, Cr, As, Pb were opposite. The cumulative rate of heavy metals in wheat decreased with the increasing application of manure. This research has an important significance in scientific determination of the heavy metal loads of plow layer, ensuring the quality and safety of agricultural production, and providing a scientific basis for the source control of soil heavy metal pollution and the safety production of agricultural goods. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Copper
Controlled terms:Agriculture - Animals - Bioaccumulation - Biochemistry - Cadmium - Chemical contamination - Fertilizers - Food supply - Grain (agricultural product) - Heavy metals  - Lead - Manures - Pollution - Pollution control - Soil pollution - Soil pollution control - Soil surveys - Soils - Straw - Zinc
Uncontrolled terms:Agricultural productions - Environmental capacity - Heavy metal accumulation - Migration - Poultry manure - Quality and safeties - Soil profiles - Wheat
Classification code:461.9  Biology - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2  Biochemistry - 804  Chemical Products Generally - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 822.3  Food Products
Numerical data indexing:Age 4.00e+00yr, Percentage 1.42e+01% to 2.04e+01%, Percentage 2.82e+01% to 4.49e+01%, Percentage 2.97e+01% to 4.85e+01%, Percentage 4.38e+01% to 1.19e+02%, Percentage 6.00e+00%, Percentage 6.39e+01% to 7.89e+01%, Percentage 7.21e+01% to 8.87e+01%, Percentage 7.64e+01% to 1.19e+02%, Size 0.00e+00m to 1.50e-01m, Size 1.50e-01m to 3.00e-01m, Size 3.00e-01m to 6.00e-01m
DOI:10.13227/j.hjkx.201609227

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 118>

Accession number:20171003416432
Title:Variation characteristics of vegetables cadmium uptake factors and its relations to environmental factors
Authors:Yang, Yang (1, 2); Li, Yan-Ling (1, 2); Chen, Wei-Ping (1); Wang, Mei-E (1); Peng, Chi (1)
Author affiliation:(1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Chen, Wei-Ping(wpchen@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:399-404
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The consumption of vegetables is a probable cause of Cd exposure in several world areas including China. In this study, we selected the prefecture of Youxian, southern China, as a case to analyze the influences of various environmental factors on Cd accumulation in vegetables based on a large scale agricultural and climatologically survey and collection of 585 irrigation water and 625 paired soil-vegetables samples. The results showed the concentration of Cd differed greatly in the irrigation water, soil and vegetables. The average daily dose for the adult populations consumed vegetables cropping in affected areas was slightly above the tolerable daily intake level, suggesting a potential health risk. The vegetables Cd uptake factor followed the natural lognormal distribution, and had a 10 percentile probability of higher than 1. The PUF values exhibited comparable results and appeared to define a reasonable and consistent Cd risk assessment. Many environmental variables (soil pH, soil organic matter, cation-exchange capacity, rainfall, water pH, and nitrogenous fertilizer usage) exhibited significant correlations with the concentrations of Cd in the soil-vegetable system. The canonical corresponding analysis and path model analysis found that soil pH and soil organic matter (SOM) had major direct effects on PUF. The close correlations between rainfall, water pH, nitrogen fertilizer usage and PUF were mainly resuled from the direct effect of soil pH and SOM. The high field-moisture capacity in the study area generated a rapid acidification causing the migration of Cd to weaker bounding sites thus promoting the vegetables uptake. The excessive application of nitrogen fertilizers led to a substantial loss of SOM and worsening of soil acidification ultimately causing increasing Cd accumulation in vegetables. Considering that the soil pH and SOM in the study area were maintained at a low level, the accumulation risk of Cd in soil-vegetable system needs to be addressed. The influence of environmental factors on vegetables accumulating Cd needs to be fully considered for better and safer vegetables production. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Soil pollution
Controlled terms:Acidification - Biogeochemistry - Biological materials - Cadmium compounds - Distribution functions - Fertilizers - Gaussian distribution - Health risks - Irrigation - Nitrogen  - Nitrogen fertilizers - Organic compounds - pH effects - Probability distributions - Rain - Regression analysis - Risk assessment - Soils - Vegetables - Water
Uncontrolled terms:Canonical correlation analysis - Cation exchange capacities - Environmental factors - Environmental variables - Log-normal distribution - Path analysis - Tolerable daily intake - Variation characteristics
Classification code:443.3  Precipitation - 461.2  Biological Materials and Tissue Engineering - 461.7  Health Care - 483.1  Soils and Soil Mechanics - 801.1  Chemistry, General - 801.2  Biochemistry - 804  Chemical Products Generally - 804.1  Organic Compounds - 821.3  Agricultural Methods - 821.4  Agricultural Products - 822.2  Food Processing Operations - 914.1  Accidents and Accident Prevention - 922.1  Probability Theory - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201606075

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 119>

Accession number:20171003416433
Title:Effect of sewage sludge compost products application on total mercury and methylmercury in soil and plants
Authors:Yu, Ya-Wei (1); Yang, Yu-Han (1); Zhang, Cheng (1, 2); Yi, Jian-Ting (1); An, Si-Wei (1); Wang, Ding-Yong (1, 2)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China
Corresponding author:Zhang, Cheng(zhcheng@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:405-411
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Two different sludge composting products (with and without biochar) were applied in field to study the variations of total mercury (THg) and methylmercury (MeHg) in soil and plants, as well as their migration in the soil-plant system and accumulation ability in plants during the sludge compost land use process. The results indicated that the concentrations THg and MeHg in soil increased after applying sewage sludge compost products, while the THg level was still lower than the secondary standard of national soil environmental quality. Biochar was speculated to probably promote the soil mercury methylation with lower MeHg/THg ratios in different soil treatments. THg concentrations in mature plants were significantly lower than those in seedling stage, but MeHg levels were higher than those in seedling stage. An obvious influence of composting on MeHg enrichment in plants was observed, and this similar effect was not found for THg enrichment. MeHg concentration in the soils applied with biochar compost was significantly higher than that without applying biochar compost soil, while MeHg in plant presented a contrary trend with higher level observed in no-biochar compost soil, suggesting that the addition of biochar could be in favour of soil MeHg formation and inhibit the MeHg accumulation in plants by influencing its migration. Since a strong MeHg accumulation ability with BCF of 1.24-14.63 was present in plant, the mercury ecological risk in soil environment caused by long-term fertilizing should be noticed. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Soil pollution
Controlled terms:Alkylation - Composting - Land use - Mercury (metal) - Plants (botany) - Sewage sludge - Soils
Uncontrolled terms:Accumulation - Bio chars - Compost products - Methyl mercury - Plant - Total mercuries
Classification code:403  Urban and Regional Planning and Development - 452.2  Sewage Treatment - 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.201606045

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 120>

Accession number:20171003409573
Title:Accumulation and biotransformation in typical freshwater algae species influenced by titanium dioxide nanoparticles under long-term exposure
Authors:Li, Jin-Li (1, 3); Wang, Zhen-Hong (2, 3); Yan, Ya-Meng (3); Huang, Bing (1); Luo, Zhuan-Xi (3)
Author affiliation:(1) Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming; 650500, China; (2) Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology, College of Chemistry and Environment, Minnan Normal University, Zhangzhou; 363000, China; (3) Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen; 361021, China
Corresponding author:Luo, Zhuan-Xi(zxluoire@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:832-836
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In the present study, the accumulation and biotransformation of arsenate in typical freshwater algae species were examined under long-term influence of titanium dioxide nanoparticles (nano-TiO<inf>2</inf>). Results showed that different algae species had largely varied capacities of accumulation and biotransformation of arsenate. The arsenic accumulation reached (819.66&plusmn;11.25) &mu;g&middot;g<sup>-1</sup>DW in Scenedesmus obliquus, which was higher than that in Microcystis aeruginosa of (355.95&plusmn;8.31) &mu;g&middot;g<sup>-1</sup>DW. Nano-TiO<inf>2</inf>increased arsenic accumulation in these exposed algae species, and then reduced arsenic levels in the relative culture media. Furthermore, nano-TiO<inf>2</inf>improved arsenic biotransformation in the exposed algae, and the organic arsenic was dimethylarsinous acid (DMA) and monomethylarsonous acid (MMA) in Microcystis aeruginosa and Scenedesmus obliquus, respectively. Additionally, the release of organic arsenic was lower from the exposed algae in nano-TiO<inf>2</inf>treatments than in the control, indicating that nano-TiO<inf>2</inf>couldn't stimulate the release of organic arsenic from algae under long-term exposure. These results could improve insights on the ecological risk of nano-TiO<inf>2</inf>associated with arsenic in the environment. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Algae
Controlled terms:Arsenic - Bacteria - Bioconversion - Nanoparticles - Oxides - Titanium - Titanium dioxide - Water
Uncontrolled terms:Arsenate - Dimethylarsinous acid - Long term exposure - Microcystis aeruginosa - Monomethylarsonous acids - Scenedesmus obliquus - Speciation - Titanium dioxide nanoparticles
Classification code:542.3  Titanium and Alloys - 761  Nanotechnology - 801.2  Biochemistry - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 933  Solid State Physics
DOI:10.13227/j.hjkx.201608134

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 121>

Accession number:20171003409554
Title:Start-up of combined floc-granule CANON process and the effects of SRT on reactor performance
Authors:Sun, Yan-Fang (1); Han, Xiao-Yu (2, 3, 4); Zhang, Shun-Jun (3, 4); Li, Xing (1); Cao, Xiang-Sheng (1)
Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China; (2) College of Resources and Environmental Engineering, Harbin Institute of Technology, Harbin; 150090, China; (3) Research and Development Center of Beijing Drainage Group Technology, Beijing; 100022, China; (4) Beijing Engineering Research Center for Wastewater Reuse, Beijing; 100124, China
Corresponding author:Cao, Xiang-Sheng(caxish@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:672-678
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To shorten the start-up time of CANON process and guide the sludge dischargement in the practical project, the start-up of CANNON process and influence of different flocs SRT were studied by inoculation ANAMMOX granules of different proportions in two same specifications of SBR reactor. During the experiment, the temperature was controlled at 30&#8451;&plusmn;1&#8451; and pH was 7-8. The results showed that it was not good for CANON process rapid start-up when the two reactors were inoculated with 5% and 10% ANAMMOX granules respectively and the initial FA concentration exceeded 44 mg&middot;L<sup>-1</sup>. When the two reactors were inoculated with 5% and 10% ANAMMOX granular sludge, the reactors were started-up successfully on Day 46 and Day 35, respectively. When the flocs SRT was maintained at 30 d, 90 d and un-initiative discharge respectively, the average total nitrogen removal rate could reach 0.35 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>stably. The quantitative PCR results of the three different flocs SRT showed that with increasing flocs SRT, the abundance of AOB was relatively stable, the abundance of ANAMMOX increased slightly, while the abundance of NOB significant increased. Therefore, it is necessary to elutriate flocs from reactor for decreasing the quantity of NOB and long-term stable operation of the CANON process. &copy; 2017, Science Press. All right reserved.
Number of references:23
Main heading:Nitrogen removal
Controlled terms:Granular materials - Granulation - Nitrogen - Polymerase chain reaction - Reactor startup - Wastewater treatment
Uncontrolled terms:Autotrophic nitrogen removal - Different proportions - Granular sludge - Practical projects - Quantitative PCR - Reactor performance - Sludge retention time - Total nitrogen removal
Classification code:452.4  Industrial Wastes Treatment and Disposal - 621  Nuclear Reactors - 801.2  Biochemistry - 802.3  Chemical Operations - 804  Chemical Products Generally - 951  Materials Science
Numerical data indexing:Mass_Density 4.40e-02kg/m3, Percentage 1.00e+01%, Percentage 5.00e+00%
DOI:10.13227/j.hjkx.201608108

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 122>

Accession number:20171003409547
Title:Impact of ammonia and H<inf>2</inf>O<inf>2</inf>on bromate and disinfection by-products control
Authors:Wang, Yong-Jing (1, 2); Du, Xu (1); Jin, Meng (1); Feng, Si-Jie (1); Yang, Kai (2, 3); Zhang, Ming-Lu (1); Yu, Jian-Wei (2, 3)
Author affiliation:(1) Department of Environmental Science and Engineering, School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing; 100048, China; (2) Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Yu, Jian-Wei(jwyu@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:616-621
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A pilot-scale study with conventional water treatment and ozone-biological activated carbon (O<inf>3</inf>-BAC) treatment was conducted to evaluate the impact of ammonia and hydrogen peroxide (H<inf>2</inf>O<inf>2</inf>) addition on the bromate and disinfection by-products formation potential (DBPFP) control, with bromide containing water as raw water. It was found that bromate concentration would exceed 10.00 &mu;g&middot;L<sup>-1</sup>as ozone doses were higher than 1.0 mg&middot;L<sup>-1</sup>under different water qualities. Ammonia and H<inf>2</inf>O<inf>2</inf>could effectively control bromate formation and bromate concentration decreased as ammonia and H<inf>2</inf>O<inf>2</inf>doses increased. Bromate concentration could be controlled below 10.00 &mu;g&middot;L<sup>-1</sup>as ammonia dose was 0.10-0.30 mg&middot;L<sup>-1</sup>or the m(H<inf>2</inf>O<inf>2</inf>)/m(O<inf>3</inf>) was 0.2-1.0. However, as ammonia-H<inf>2</inf>O<inf>2</inf>was combined for the same purpose, bromate increased firstly and then decreased. Ammonia addition would not significantly affect the THMFP control but H<inf>2</inf>O<inf>2</inf>application would depress the efficiency of THMFP removal. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Ozone water treatment
Controlled terms:Activated carbon - Activated carbon treatment - Ammonia - Disinfection - Hydrogen peroxide - Oxidation - Ozone - Peroxides - Water quality - Water treatment
Uncontrolled terms:Biological activated carbon - Bromate - Bromate formation - Conventional water treatment - Disinfection by-product - Disinfection by-products formation potential - Pilot-scale study - Trihalomethanes
Classification code:445.1  Water Treatment Techniques - 445.2  Water Analysis - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.00e-03kg/m3, Mass_Density 1.00e-04kg/m3 to 3.00e-04kg/m3, Mass_Density 1.00e-05kg/m3
DOI:10.13227/j.hjkx.201605091

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 123>

Accession number:20171003409549
Title:Adsorptive remediation of Cr(VI) contaminated groundwater with chemically synthesized schwertmannite
Authors:Zhu, Li-Chao (1); Liu, Yuan-Yuan (1); Li, Wei-Min (1); Mou, Hai-Yan (1, 2); Wang, Wan-Yu (1); Shi, De-Zhi (1); Wang, Tao (1)
Author affiliation:(1) Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing; 400044, China; (2) College of Architecture and Environment, Sichuan University, Chengdou; 610065, China
Corresponding author:Liu, Yuan-Yuan(liuyuanyuan@cqu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:629-639
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Schwertmannite is usually naturally found in acidic mining wastewater and frequently used in the adsorption of heavy metal anions from water and wastewater. Schwertmannite was synthesized through a facile chemical method and utilized to remove Cr(VI) from contaminated groundwater. The kinetics, thermodynamics and isotherms, as well as the effects of environmental factors on the Schwertmannite adsorption processes were investigated. The experimental results showed that the synthesized Schwertmannite had a strong adsorption capability of Cr(VI) from aqueous solution. At the pre-set initial concentrations of Cr(VI), the Schwertmannite adsorption of Cr(VI) achieved equilibrium within 24 h, and the Lagergren's second-order model fitted the adsorption process better compared to Lagergren's first-order model and intraparticle diffusion model. Langmiur equation fitted the adsorption isotherms better than Freundlich equation. The Cr(VI) adsorption on Schwertmannite mainly involved ion exchange reaction between Cr(VI) and anions such as OH<sup>-</sup>and SO<inf>4</inf><sup>2-</sup>and surface complexation reactions. The &Delta;H<sup>&theta;</sup>and &Delta;G<sup>&theta;</sup>were 6.368 kJ&middot;mol<sup>-1</sup>and -1.215 kJ&middot;mol<sup>-1</sup>, respectively, therefore the adsorption of Cr(VI) was a spontaneous and endothermic process. The removal of Cr(VI) from aqueous solution increased with increasing Schwertmannite dosage at pH =4.5. Acidic pH in the range of 4.5-6 favored Cr(VI) removal with Schwertmannite compared to that under basic conditions. Under the conditions of 5 mg&middot;L<sup>-1</sup>of initial Cr(VI) concentration, 0.5 g&middot;L<sup>-1</sup>of Schwertmannite dosage, pH=6, maximum Cr(VI) removal of 93.1% was achieved and the adsorption capacity of Cr(VI) with Schwertmannite reached up to 40.4 mg&middot;g<sup>-1</sup>. Batch tests showed that the presence of HCO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>inhibited the adsorption of Cr(VI) while Cl<sup>-</sup>had no significant impact. Cations and natural organic matter had a pH-dependent impact on Cr(VI) removal: at pH=8 natural organic matter and cations would significantly inhibit the Cr(VI) sorption, while the impact could be neglected at weak acidic conditions (pH=6). &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Chromium
Controlled terms:Adsorption - Biogeochemistry - Biological materials - Chromium compounds - Complexation - Groundwater - Groundwater pollution - Heavy metals - Hydrochemistry - Ion exchange  - Ions - Organic compounds - pH - Positive ions - Remediation - Solutions - Surface reactions - Synthesis (chemical) - Thermodynamics
Uncontrolled terms:Adsorption capability - Contaminated groundwater - Environmental factors - Intraparticle diffusion models - Ion exchange reactions - Natural organic matters - Schwertmannite - Surface complexation reactions
Classification code:444.2  Groundwater - 454.2  Environmental Impact and Protection - 461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 531  Metallurgy and Metallography - 543.1  Chromium and Alloys - 641.1  Thermodynamics - 801.1  Chemistry, General - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 5.00e-01kg/m3, Percentage 9.31e+01%, Time 8.64e+04s
DOI:10.13227/j.hjkx.201608044

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 124>

Accession number:20171003416388
Title:Particle size distribution and diffusion for simulated cooking fume
Authors:Li, Shuang-De (1); Xu, Jun-Bo (1); Mo, Sheng-Peng (1, 2); Li, Wen-Hui (1, 2); Gao, Jia-Jia (3); Cao, Ya-Qun (3); Chen, Yun-Fa (1)
Author affiliation:(1) State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China; (2) University of Chinese Academy of Sciences, Beijing; 100190, China; (3) Key Laboratory of Healthy &amp; Intelligent Kitchen System Integration, Ningbo; 315336, China
Corresponding author:Chen, Yun-Fa(yfchen@ipe.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:33-40
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Studying particle size distribution and dispersion characteristics of cooking oil fume can help to analyze the influence of the particles on indoor air quality and the health of the residents. Electrical low pressure impactor (ELPI) was employed to measure the number and mass concentration of the particles size range of 0.03-10 &mu;m at two different locations in the kitchen space with smoke exhaust on and off, respectively. The cooking particles were mostly located at below 655 nm. The smoke exhaust with open condition could remarkably decrease the kitchen's cooking fume. The number concentration of particles decreased from 2.8&times;10<sup>6</sup>cm<sup>-3</sup>to 2.3&times;10<sup>5</sup>cm<sup>-3</sup>, and PM<inf>2.5</inf>(aerodynamics diameter &le;2.5 &mu;m particulate matter) mass concentrations decreased from 85.9 mg&middot;m<sup>-3</sup>to 6.2 mg&middot;m<sup>-3</sup>. The sucking efficiency of smoke exhaust for PM<inf>10</inf>was higher than PM<inf>2.5</inf>. The number concentration of particles could be declined by 65%, and the cooking fume of PM<inf>2.5</inf>could be declined by 75% during the diffusion process detected at the area of 3 m far away from the area where cooking took place. The distribution of PM<inf>2.5</inf>mass concentration field of oil fume was simulated by computational fluid dynamics. The temperature field distribution of oil fume was monitored by infrared camera, presenting sector diffusion with the temperature decreasing from 70&#8451; to room temperature. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Particle size analysis
Controlled terms:Air quality - Computational fluid dynamics - Diffusion - Indoor air pollution - Light transmission - Oils and fats - Particle size - Particles (particulate matter) - Size distribution - Smoke  - Temperature - Temperature distribution
Uncontrolled terms:Dispersion characteristics - Electrical low-pressure impactor - Fume particles - Indoor air quality - Mass concentration - Number concentration - Particulate Matter - Temperature field distribution
Classification code:451  Air Pollution - 451.2  Air Pollution Control - 641.1  Thermodynamics - 723.5  Computer Applications - 741.1  Light/Optics - 804.1  Organic Compounds - 922.2  Mathematical Statistics - 951  Materials Science
Numerical data indexing:Percentage 6.50e+01%, Percentage 7.50e+01%, Size 3.00e+00m, Size 3.00e-08m to 1.00e-05m, Size 6.55e-07m
DOI:10.13227/j.hjkx.201605110

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 125>

Accession number:20171003409571
Title:Effects of continuous application of sewage sludge compost on heavy metals accumulation and mobility characteristics in soil profile and on heavy metals uptake of wheat
Authors:Sun, Na (1); Shang, He-Ping (1); Ru, Shu-Hua (2); Su, De-Chun (1)
Author affiliation:(1) College of Resource and Environment Sciences, China Agricultural University, Beijing; 100193, China; (2) Institute of Agro-resource and Environment, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang; 050051, China
Corresponding author:Su, De-Chun(dcsu@cau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:815-824
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The use of sewage sludge compost(SSC)as fertilizer may cause increased leaching due to its high content of heavy metals and thus pose a threat to groundwater quality. The effect of SSC application on heavy metals leaching in calcareous soils has been studied in field trials, which provides basis for determining heavy metals environmental capacity and preventing metal pollution in farmland soil scientifically. The results indicated that the contents of Cu, Zn elevated obviously with the increase of the age and the dosage of SSC utilization in the topsoil(0-15 cm) under 4-year continuous application of SSC. Under higher levels of the compost treatment, the heavy metals Cu and Zn were found to migrate into the 15-30 cm soil and 60-90 cm soil under the experimental condition. Nevertheless, the majority of Cu and Zn from SSC accumulated in topsoil and the highest accumulation rates could reach 75.3% for Cu and 85.9% for Zn. The contents of Cd, Pb increased significantly in topsoil after 4-year continuous application of SSC, and their increases could reach 57.2%-165.2% for Cd and 13%-34% for Pb compared with CK. At 60-90 cm soil, the contents of Cr, As and Pb were also significantly higher than those in CK treatment. Application of SSC not only caused accumulation of some heavy metals in topsoil but also leached heavy metals located in the subsurface soil down in this experiment. Continuous utilization of SSC increased Zn concentration of wheat grain, and the increase could reach 13.3%-47.9%. For the concentrations of Cr and Pb in wheat grain, the values exceeded the national food and healthy standards value (GB 2762-2012) in part of compost treatments. The cumulative ratio of heavy metals carried out by wheat were all below 10% after 4-year experiment, wheat grain carried much more Cu, Zn out than wheat straw, but it was opposite for Cr, As, Cd, Pb. The cumulative ratio of heavy metals carried by wheat decreased with the increasing level of SSC utilization. The amounts of heavy metals migrated to deeper soil should be considered when determining the environmental capacity of heavy metals in farmland soil. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Soil pollution
Controlled terms:Cadmium - Carrier mobility - Composting - Copper - Farms - Grain (agricultural product) - Groundwater - Heavy metals - Leaching - Lead  - Sewage sludge - Soils - Water quality - Zinc
Uncontrolled terms:Accumulation rates - Cumulative ratios - Environmental capacity - Experimental conditions - Mobility characteristics - Sewage sludge compost - Soil profiles - Wheat
Classification code:444.2  Groundwater - 445.2  Water Analysis - 452.2  Sewage Treatment - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 712.1  Semiconducting Materials - 802.3  Chemical Operations - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 821.4  Agricultural Products
Numerical data indexing:Age 4.00e+00yr, Percentage 1.00e+01%, Percentage 1.30e+01% to 3.40e+01%, Percentage 1.33e+01% to 4.79e+01%, Percentage 5.72e+01% to 1.65e+02%, Percentage 7.53e+01%, Percentage 8.59e+01%, Size 0.00e+00m to 1.50e-01m, Size 1.50e-01m to 3.00e-01m, Size 6.00e-01m to 9.00e-01m
DOI:10.13227/j.hjkx.201608031

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 126>

Accession number:20171003409543
Title:Efficiency and mechanism of nitrogen and phosphorus removal in modified zeolite wetland
Authors:Wu, Peng (1); Lu, Shuang-Jun (2); Xu, Le-Zhong (1); Liang, Qi-Qi (1); Shen, Yao-Liang (1, 3, 4)
Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Suzhou Environmental Science Research Institute, Suzhou; 215004, China; (3) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China; (4) Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, 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:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:580-588
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To study the efficiency and mechanism of nitrogen and phosphorus removal for decentralized rural sewage in modified zeolite wetland, the modified zeolite was applied as substrate into a combined process composed of anaerobic baffled reactor (ABR) and baffled flow constructed wetland (BFCW), providing a new way for rural sewage treatment in Suzhou City. The study was contrasted with zeolite wetland. The results showed that the modified zeolite wetland had high efficiency and stability of nitrogen and phosphorus removal, and the nitrogen and phosphorus removal quantities of modified zeolite wetland were 1.8% and 1 times higher than those of zeolite wetland during the trial. The modified zeolite wetland mainly removed nitrogen and phosphorus by substrate adsorption, and the main fractions of modified zeolite were Ca-P and Al-P. The oxygen-secretion and absorption of plants stabilized the water quality of the effluent. The substrate adsorption was the main nitrification removal pathway in front of the wetland, and nitrification and denitrification were the main nitrification removal pathways at the end of the wetland. The nitrogen and phosphorus adsorption capacities during the pilot test were much higher than those of the static test. The optimization of phosphorus adsorption capacity for modified zeolite was achieved under the synergy of multiple pathways. The effect of configuration and plant root was the main reason for the difference of nitrogen and phosphorus adsorption quantities. Nitrification intensity led to the seasonal fluctuation of nitrogen removal effect and stability in modified zeolite wetland, and the low nitrification intensity in the front of wetland was related to the strong adsorption of NH<inf>4</inf><sup>+</sup>-N by the modified zeolite. &copy; 2017, Science Press. All right reserved.
Number of references:14
Main heading:Nitrogen removal
Controlled terms:Adsorption - Efficiency - Effluents - Mechanisms - Nitrification - Nitrogen - Phosphorus - Rural areas - Sewage treatment - Water absorption  - Water quality - Wetlands - Zeolites
Uncontrolled terms:Anaerobic baffled reactor - Constructed wetlands - Modified zeolite - Nitrification and denitrification - Nitrogen and phosphorus - Nitrogen and phosphorus removal - Phosphorus adsorption - Rural sewages
Classification code:445.2  Water Analysis - 452.2  Sewage Treatment - 452.3  Industrial Wastes - 601.3  Mechanisms - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 913.1  Production Engineering
Numerical data indexing:Percentage 1.80e+00%
DOI:10.13227/j.hjkx.201607190

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 127>

Accession number:20171003416411
Title:Enhanced treatment of petrochemical secondary effluent by biological aerated filter (Fe<sup>2+</sup>)-ozonation process
Authors:Xu, Min (1, 2); Wu, Chang-Yong (2); Zhou, Yue-Xi (2); Guo, Ming-Kun (3); Wang, Yi (4)
Author affiliation:(1) College of Water Science, Beijing Normal University, Beijing; 100875, China; (2) Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Earth Science and Environment Engineering, Southwest Jiaotong University, Chengdu; 611756, China; (4) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China
Corresponding author:Zhou, Yue-Xi(zhouyuexi@263.net)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:229-237
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Two parallel biological aerated filters (BAF)-ozonation, named as number 1 (feeding with FeSO<inf>4</inf>&middot;7H<inf>2</inf>O) and number 2, were used to treat petrochemical secondary effluent. The effect of FeSO<inf>4</inf>&middot;7H<inf>2</inf>O on COD and phosphorus removal by BAF-ozonation was studied. Molecular weight distribution, three-dimensional fluorescence scan and gas chromatography-mass spectrometry (GC-MS) were used to analyze water quality before and after BAF-ozonation. The results showed the average COD and TP concentrations were 82.91 mg&middot;L<sup>-1</sup>and 1.37 mg&middot;L<sup>-1</sup>, respectively. When the dosage of FeSO<inf>4</inf>&middot;7H<inf>2</inf>O was 9 mg&middot;L<sup>-1</sup>, the average removal rates of COD and TP were 52.20% and 71.50%, respectively. The average COD removal rate in number 1 combined process was 17.15%, which was higher than that in number 2 combined process. The TP removal rate in number 1 combined process was increased by 51.81%. The percentage of dissolved organic matters with relative molecular weight less than 1&times;10<sup>3</sup>was 52% in the raw wastewater. However, the percentage increased to 75% when treated by number 1 combined process and the removal rate of various molecular weight organics was increased. Three-dimensional fluorescence analysis showed that the dosage of FeSO<inf>4</inf>&middot;7H<inf>2</inf>O could improve the removal of fluorescent substances. GC-MS results showed that the number and concentration of organics were reduced after number 1 combined process in comparison with number 2 combined process. BAF-ozone could be enhanced by FeSO<inf>4</inf>&middot;7H<inf>2</inf>O when treating petrochemical secondary effluent. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Effluents
Controlled terms:Bandpass filters - Barium compounds - Biofilters - Biogeochemistry - Biological materials - Effluent treatment - Fluorescence - Gas chromatography - Mass spectrometry - Molecular weight  - Molecular weight distribution - Organic compounds - Ozone - Ozone water treatment - Ozonization - Passive filters - Petrochemicals - Water quality
Uncontrolled terms:Advanced treatment - Biological aerated filter - Biological aerated filters (BAF) - Dissolved organic matters - Gas chromatography-mass spectrometries (GC-MS) - Phosphorus removal - Secondary effluent - Three-dimensional fluorescences
Classification code:445.2  Water Analysis - 452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 703.2  Electric Filters - 741.1  Light/Optics - 801  Chemistry - 801.2  Biochemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 931.3  Atomic and Molecular Physics
Numerical data indexing:Mass_Density 1.37e-03kg/m3, Mass_Density 8.29e-02kg/m3, Mass_Density 9.00e-03kg/m3, Percentage 1.71e+01%, Percentage 5.18e+01%, Percentage 5.20e+01%, Percentage 5.22e+01%, Percentage 7.15e+01%, Percentage 7.50e+01%
DOI:10.13227/j.hjkx.201606197

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 128>

Accession number:20172603860983
Title:Reducing Effect of Three Disinfection Technologies for Sulfonamides Resistance Genes
Authors:Zheng, Ji (1); Zhou, Zhen-Chao (1); Chen, Fang (2); Chen, Tao (1); Wei, Yuan-Yuan (1); Han, Yue (1); Chen, Hong (1)
Author affiliation:(1) Institute of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou; 310058, China; (2) Hangzhou Environmental Monitoring Center, Hangzhou; 310007, China
Corresponding author:Chen, Hong(chen_hong@zju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1497-1505
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Antibiotic resistance genes (ARGs) in the environment have gradually engendered extensive concern recently due to the harm caused to environment and human beings. In this study, two sulfonamides resistant bacteria isolated from secondary effluents of a municipal wastewater treatment plant were used to compare the efficacy of three different disinfection processes (chlorination, ultraviolet and ozone) in reducing sulfonamides resistance pollution using serial dilution plate counting method and qPCR. The behavior characteristics of sulfonamides resistance genes during the disinfection process were elucidated using disinfection+DNase I treatment. The results showed that all three disinfection techniques could reduce the concentration of target bacteria, but the abundance of sulfonamides resistance genes was still at a high level. Furthermore, chlorination disinfection might reduce sulfonamides resistance genes by reducing microbial biomass. Ultraviolet disinfection could damage genes directly. However, during ozone disinfection, sulfonamides resistance genes would escape to environment, and its potential environmental risks could not be ignored. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Wastewater treatment
Controlled terms:Amides - Antibiotics - Bacteria - Chlorination - Disinfection - Effluents - Genes - Ozone - Ozone resistance - Polymerase chain reaction  - Sulfur compounds
Uncontrolled terms:Antibiotic resistance genes - Behavior characteristic - Disinfection process - Dnase i - Municipal wastewater treatment plants - Real-time quantitative PCR - Sulfonamides - Ultraviolet disinfections
Classification code:452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 801.2  Biochemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201610059

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 129>

Accession number:20172603860961
Title:Characteristics of the Size Distribution of Water Soluble Inorganic Ions in Sanya, Hainan
Authors:Wang, Lu (1, 2); Liu, Zi-Rui (1); Wen, Tian-Xue (1); Miao, Hong-Yan (1); Wang, Yue-Si (1)
Author affiliation:(1) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Liu, Zi-Rui(lzr@dq.cern.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1298-1306
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Size-resolved filter samples were collected in Sanya every other week from June 2012 to May 2014. The mass concentrations of water-soluble inorganic ions, including anions (Cl<sup>-</sup>, NO<inf>3</inf><sup>-</sup>, SO<inf>4</inf><sup>2-</sup>) and cations (Na<sup>+</sup>, NH<inf>4</inf><sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>) were measured by ion chromatography. The results showed that the total concentrations of measured water-soluble inorganic ions were (8.91&plusmn;7.27) and (11.34&plusmn;9.37) &mu;g&middot;m<sup>-3</sup>in PM<inf>2.1</inf>and PM<inf>2.1-9</inf>, respectively. In PM<inf>2.1</inf>, SO<inf>4</inf><sup>2-</sup>and NH<inf>4</inf><sup>+</sup>comprised 72.2% of all water-soluble inorganic ions, while in PM<inf>2.1~9</inf>, Cl<sup>-</sup>, Ca<sup>2+</sup>and Na<sup>+</sup>comprised 67.6% of all water-soluble inorganic ions. In PM<inf>2.1</inf>, the total concentrations of water-soluble inorganic ions had highest concentrations in winter and lowest concentrations in summer. In PM<inf>2.1~9</inf>, the total concentrations of water-soluble inorganic ions presented the highest concentrations in summer. SO<inf>4</inf><sup>2-</sup>and NH<inf>4</inf><sup>+</sup>showed bimodal size distributions and the peaks in the fine mode shifted from 0.43-0.65 &mu;m in spring, summer and autumn to 0.65-1.1 &mu;m in winter. NO<inf>3</inf><sup>-</sup>, Na<sup>+</sup>, Cl<sup>-</sup>, Ca<sup>2+</sup>and Mg<sup>2+</sup>were unimodal with the peaks in the coarse mode of 4.7-9.0 &mu;m. K<sup>+</sup>showed bimodal size distribution with the fine mode at 0.43-0.65 &mu;m and the coarse mode at 4.7-5.8 &mu;m. PCA analysis showed that water-soluble inorganic ions were mainly affected by the secondary formation, sea salt and soil particles or falling dust. &copy; 2017, Science Press. All right reserved.
Number of references:39
Main heading:Ions
Controlled terms:Calcium - Ion chromatography - Size distribution
Uncontrolled terms:Bimodal size distribution - Filter sample - Mass concentration - PCA analysis - Sanya - Seasonal variation - Soil particles - Water soluble inorganic ions
Classification code:549.2  Alkaline Earth Metals - 801  Chemistry - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 6.76e+01%, Percentage 7.22e+01%, Size 4.30e-07m to 6.50e-07m, Size 4.70e-06m to 5.80e-06m, Size 4.70e-06m to 9.00e-06m, Size 6.50e-07m to 1.10e-06m
DOI:10.13227/j.hjkx.201608081

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 130>

Accession number:20172603860976
Title:Pollution Characteristics and Risk Assessment of Heavy Metals from River Network Sediment in Western Area of Taihu Lake
Authors:Bian, Bo (1, 2); Zhou, Yan (1, 3); Zhang, Qin (1, 3)
Author affiliation:(1) Jiangsu Academy of Environmental Science, Nanjing; 210036, China; (2) Jiangsu Province Key Laboratory of Environmental Engineering, Nanjing; 210036, China; (3) College of Environment, Hohai University, Nanjing; 210098, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1442-1450
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:River sediments is a valuable environmental medium for characterizing contamination of heavy metals in the western areas of Taihu Basin and the associated risks to human health. We collected samples of typical inflow river sediments from nineteen sites during different water periods. The results showed that the concentrations of heavy metals in the river sediments followed the order of Zn&gt;Cr&gt;Cu&gt;Pb&gt;Ni&gt;As&gt;Cd&gt;Hg. Compared to the background concentrations, the mean concentrations of Zn, Cd, Cu, Ni and Pb seriously exceeded the standard values. Except for As, the highest concentrations of heavy metals (Zn, Cr, Cu, Pb, Ni, Cd, Hg) were found in the samples from normal water period. The metal (Cd) presented moderate pollution degree and ecological risks,and the RI value of Cd accounted for about 47% of the total RI value. The mPEC-Q values of the sediments were in the range of 0.12-0.76, and the mean value was 0.3, indicating that the sediments in all of the sampling sites had a 15%-29% probability of toxicity. In terms of the highest value of the heavy metals, higher concentrations, I<inf>geo</inf>, mPEC-Q and PCA values were found at the S2 sampling sites. The results showed that effects of synergism of heavy metals pollutants on the point were found in the paper, which will provide scientific basis for control of heavy metal pollution in the Taihu Basin. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:River pollution
Controlled terms:Cadmium - Copper - Health risks - Heavy metals - Lake pollution - Lead - Nickel - Pollution - Pollution control - Risk assessment  - Rivers - Sediments - Water pollution - Water resources - Zinc
Uncontrolled terms:Background concentration - Different water periods - Ecological risks - Environmental medium - Heavy metal pollution - Mean concentrations - Pollution degree - River sediments
Classification code:444  Water Resources - 453  Water Pollution - 461.7  Health Care - 483  Soil Mechanics and Foundations - 531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 1.50e+01% to 2.90e+01%, Percentage 4.70e+01%
DOI:10.13227/j.hjkx.201608078

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 131>

Accession number:20171003409538
Title:Succession pattern of phytoplankton of Daning River in the Three Gorges Reservoir and its driving factors
Authors:Zhang, Jia-Lei (1); Zheng, Bing-Hui (2); Liu, De-Fu (1); Wang, Li-Jing (2); Tan, Qian-Ru (1)
Author affiliation:(1) Key Laboratory of Ecological Remediation of Lakes and Rivers and Algal Utilization of Hubei Province, College of Civil and Environmental, Hubei University of Technology, Wuhan; 430068, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China
Corresponding author:Zheng, Bing-Hui(zhengbh@craes.org.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:535-546
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To elucidate succession pattern of phytoplankton in the Daning River and its driving factors, multivariate statistical analysis was conducted. By using the monitoring data in different seasons of Daning river during April 2012 to January 2013, this paper analyzed the succession pattern of phytoplankton in the Daning River and its driving factors in typical tributaries of river-style reservoirs. According to the characteristics of water level, the operational period of the TGR was classified into following four stages: stage I (pre-November-April), stage II (May-July), stage III (July-September) and stage IV (September-November). (1)The results indicated that the values of Chlorophyll-a concentrations and algal density showed similar seasonal variations, with the highest values occurring in stage III, followed by stages IV, II and I. Succession of C-R-S growth strategies was the same generally: CR-R type dominated in stage I, CS, CR/CS and R-CR dominated in stage II, III and IV, respectively. (2)The mean values of Margalef index and Pielou index in stage IV and III were significantly greater than those in stage II and I; the value of Shannon-waver index showed that the highest value in stage III, followed in a descending order by stage I, II and IV; the successional rate had the highest value in stage IV, followed in descending order by stage III, I and II. (3) The results of Correlation analysis suggested that no significant relationships were observed between the environmental parameters and phytoplankton abundance in stage I. The results indicated that relative water column stability(RWCS), index of feasible energy for phytoplankton (E<inf>t</inf>) and index of feasible energy (Ef<sup>*</sup>) were key regulatory factors for phytoplankton community in stage I. The results indicated that E<inf>t</inf>, Ef<sup>*</sup>and total phosphorus (TP) were key regulatory factors for phytoplankton abundance in stage II. The results of the redundancy analysis (RDA) suggested that RWCS, TP and the ratio of euphotic depth [D<inf>eu</inf>(&lambda;<inf>PAR</inf>)] to mixing depth (D<inf>mix</inf>)[D<inf>eu</inf>(&lambda;<inf>PAR</inf>)/D<inf>mix</inf>] were key regulatory factors for phytoplankton community composition in stage II. The results indicated that Ef<sup>*</sup>and TP were key regulatory factors for phytoplankton abundance in stage III. The results of the RDA suggested that [D<inf>eu</inf>(&lambda;<inf>PAR</inf>)/D<inf>mix</inf>], E<inf>t</inf>, Ef<sup>*</sup>and TP were key regulatory factors for phytoplankton community composition in stage III. The results indicated that TP was key regulatory factor for phytoplankton abundance in stage IV. The results of the RDA suggested that [D<inf>eu</inf>(&lambda;<inf>PAR</inf>)/D<inf>mix</inf>] was key regulatory factor for phytoplankton community composition in stage IV. &copy; 2017, Science Press. All right reserved.
Number of references:50
Main heading:Factor analysis
Controlled terms:Multivariant analysis - Phytoplankton - Reservoirs (water) - Rivers - Water levels
Uncontrolled terms:Chlorophyll-a concentration - Driving factors - Multivariate statistical analysis - Phytoplankton abundances - Phytoplankton community - Redundancy analysis (RDA) - Succession pattern - Three gorges reservoir
Classification code:441.2  Reservoirs - 471  Marine Science and Oceanography - 922  Statistical Methods - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201606137

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 132>

Accession number:20171003409561
Title:Impacts of bioremediation on microbial communities and different forms of nitrogen in petroleum contaminated soil
Authors:Ye, Xi-Qiong (1); Wu, Man-Li (1); Chen, Kai-Li (1); Li, Wei (1); Yuan, Jing (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Corresponding author:Wu, Man-Li(wumanli@xauat.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:728-734
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A laboratory study was conducted to investigate the impacts of bioremediation on microbial communities and various nitrogen shifts in petroleum contaminated soil by using GC-MS and Illumia MiSeq technique. Results showed the concentrations of alkane reduced from 25 987.8 mg&middot;kg<sup>-1</sup>to 12 788.6 mg&middot;kg<sup>-1</sup>, and the concentrations of polycyclic aromatic hydrocarbons (PAHs) decreased from 5 322.9 mg&middot;kg<sup>-1</sup>to 2 917.2 mg&middot;kg<sup>-1</sup>. Illumia MiSeq results showed that soil microbial communities shifted significantly after remediation, and the relative abundance of some phylum of hydrocarbon degraders (Firmicutes, Bacterodetes), and some genus of degraders (Dietzia, Acinetobacter) increased. Besides, the contents of total nitrogen and ammonia nitrogen increased firstly and then decreased during remediation. However, the contents of nitrate nitrogen decreased at the early stage, and then kept stable in the later stage of remediation. It can be concluded that bioremediation effectively promoted petroleum hydrocarbon degradation, and the different fractional hydrocarbon degradation was related to the relative abundance of hydrocarbon degraders and available nitrogen contents. &copy; 2017, Science Press. All right reserved.
Number of references:22
Main heading:Polycyclic aromatic hydrocarbons
Controlled terms:Aromatic hydrocarbons - Bioremediation - Biotechnology - Hydrocarbons - Microorganisms - Nitrogen - Petroleum chemistry - Pollution - Remediation - Soil pollution  - Soils
Uncontrolled terms:GC-MS - Hydrocarbon degradation - Illumia MiSeq - Microbial communities - Petroleum hydrocarbons - Petroleum-contaminated soil - Polycyclic aromatic hydrocarbons (PAHS) - Soil microbial community
Classification code:454.2  Environmental Impact and Protection - 461.8  Biotechnology - 461.9  Biology - 483.1  Soils and Soil Mechanics - 513.1  Petroleum Refining, General - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201608008

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 133>

Accession number:20171003416421
Title:Seasonal variations of soil microbial plfas and soil enzyme activity under the citrus plantation in mt.Jinyun, Chongqing
Authors:Li, Nan-Jie (1, 2); Zeng, Qing-Ping (1, 3); He, Bing-Hui (1); Zhou, Fei (4)
Author affiliation:(1) Key Laboratory of Eco-environments in Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Engineering Technology Research Center for Information Management in Development, Chongqing Technology and Business University, Chongqing; 400067, China; (3) Sichuan Allvery Environmental Technology Co., Ltd., Chengdu; 610000, China; (4) Chongqing Key Laboratory of Forest Ecology, Chongqing; 400036, China
Corresponding author:He, Bing-Hui(hebinghui@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:309-317
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The soil microbial community and soil enzyme activity are important parts of soil ecosystem, and they are sensitive to the ecological environment. In this study, citrus plantation in Mt. Jinyun was chosen as the research object. The phospholipid fatty acid (PLFAs) combined with principal component analysis method was used to study the effect of season changes on soil microbial quantity, community structure characteristics and soil enzyme activity at 0-20 cm soil layer under citrus forest. The results obtained from this study were as follows: &#9312; The season changes had a significant impact on soil microbes (P&lt;0.05). Moreover, 16:0, i17:0, 16:1 2OH, 18:0, cy19:0&omega;8c, i17:1&omega;9c or 16:0 10-methyl were found to be common in all four seasons, and the proportion of each phospholipid fatty acid was 49.57%, 41.63%, 35.41% and 38.05%, respectively. In various microbial species, the PLFAs content of bacteria was the highest, followed by fungi, and that of actinomycetes was the lowest. Our results revealed that all kinds of micro-organisms showed obvious seasonal variation characteristics. The total PLFAs quantity of citrus forest ranged from 6.868 to 24.085 nmol&middot;g<sup>-1</sup>, which had a content order of spring&gt;autumn&gt;winter&gt;summer. The PLFAs content of bacteria, G<sup>-</sup>, G<sup>+</sup>and actinomycetes also showed the same variation trend. However, the PLFAs content of fungi showed a different variation trend, i.e., autumn was the highest, followed by winter and summer, and spring was the lowest. The results suggested that season change also had a significant impact on microbial community functional diversity index. The variation trend of richness index (R) followed the order of spring&gt;winter&gt;autumn&gt;summer. Moreover, the variation trend of diversity index (H') was winter&gt;autumn&gt;spring&gt;summer. Furthermore, the variation trend of evenness index (J) was summer&gt;autumn&gt;winter&gt;spring. The dominance index (D) increased with the change of season. &#9313; Urease showed a change with the seasons following summer&gt;spring&gt;autumn&gt;winter; Soil invertase, soil catalase and acid phosphatase activity changed obviously in autumn, followed by spring, summer, and winter. &#9314; The principal component analysis demonstrated that the PLFAs content of bacteria, G<sup>-</sup>, G<sup>+</sup>, actinomycetes and total PLFAs made the greatest contribution to soil fertility followed by that of invertase, catalase, acid phosphatase and fungi. Moreover, our studies showed that the PLFAs content of urease made a minimum contribution to the soil fertility. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Soils
Controlled terms:Bacteria - Ecology - Ecosystems - Enzyme activity - Enzymes - Fatty acids - Forestry - Fungi - Microorganisms - Phosphatases  - Phospholipids - Principal component analysis
Uncontrolled terms:Acid phosphatase activities - Citrus forest - Ecological environments - Phospholipid fatty acids - Principal component analysis method - Season changes - Soil enzyme activity - Soil microbial community
Classification code:454.3  Ecology and Ecosystems - 461.9  Biology - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.1  Organic Compounds - 922.2  Mathematical Statistics
Numerical data indexing:Molality 6.87e-06mol/kg to 2.41e-05mol/kg, Percentage 3.54e+01%, Percentage 3.80e+01%, Percentage 4.16e+01%, Percentage 4.96e+01%, Size 0.00e+00m to 2.00e-01m
DOI:10.13227/j.hjkx.201605017

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 134>

Accession number:20171003416429
Title:Cd(II) ion adsorption and sealing onto SBA-15 mesoporous particles and the related potential on Cd(II) polluted soil remediation
Authors:Huang, Hui (1); Ning, Xi-Cui (2); Guo, Zhan-Yu (1); Guo, Di (1); Zhang, Zeng-Qiang (1, 3); Li, Rong-Hua (1, 3); Wang, Li (1); Ali, Amjad (1)
Author affiliation:(1) College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China; (2) Environmental Monitoring Station of Yangling Agricultural High-tech Industries Demonstration Zone, Yangling; 712100, China; (3) Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China
Corresponding author:Li, Rong-Hua(rh.lee@nwsuaf.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:374-381
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Aiming to expand the utilization of porous silicate minerals in the remediation of heavy metal contaminated soil, the mesoporous material SBA-15 was successfully synthesized by using sodium silicate as silica source in this study. And the obtained SBA-15 samples were characterized by TEM, X-ray diffraction, N<inf>2</inf>adsorption-desorption and FTIR. Furthermore, characterization of Cd(II) adsorption and sealing performance onto SBA-15 were evaluated through batch experiment, and the remediation potential of Cd(II) contaminated soil was investigated by brassica planting in a pot experiment. The results showed that SBA-15 had the mesoporous structure with surface area of 507.3 m<sup>2</sup>&middot;g<sup>-1</sup>and pore size of 7.38 nm. The maximum Cd(II) adsorption capacity was 76.43 mg&middot;g<sup>-1</sup>at pH above 7.0 with the adsorption isotherm fitting the Langmuir model in the solution of 100 mg&middot;L<sup>-1</sup>Cd(II). The increase in ionic strength reduced the Cd(II) adsorption capacity. The Cd(II) loaded SBA-15 could be regenerated with 0.1 mol&middot;L<sup>-1</sup>HNO<inf>3</inf>, while Cd(II) could be strongly sealed in the pore structure after introduction of sodium silicate into the system. The pot experiment proved that the addition of SBA-15 (4.5 g&middot;kg<sup>-1</sup>) into Cd-contaminated soil could reduce Cd(II) availability, enhance the transformation of soluble and exchangeable Cd(II) fractions into carbonate and Fe-Mn oxides bounded forms, inhibit the Cd(II) accumulation in the plant tissue and improve the brassica growth. Based on these results, it can be concluded that combination of the SBA-15 particle with sodium silicate has great potential to remediate Cd(II) contaminated soil through adsorption and sealing properties. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Soil pollution
Controlled terms:Adsorption - Cadmium compounds - Contamination - Heavy metals - Ionic strength - Manganese - Mesoporous materials - Pollution - Pore size - Remediation  - Silicate minerals - Silicates - Silicon compounds - Soil conservation - Soils - X ray diffraction
Uncontrolled terms:Adsorption desorption - Cd(II) - Cd-contaminated soils - Contaminated soils - Heavy metal contaminated soils - Mesoporous material sba-15 - Mesoporous structures - SBA-15
Classification code:454.2  Environmental Impact and Protection - 482.2  Minerals - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 543.2  Manganese and Alloys - 801.4  Physical Chemistry - 802.3  Chemical Operations - 951  Materials Science
Numerical data indexing:Molar_Concentration 1.00e+02mol/m3, Size 7.38e-09m, Specific_Surface_Area 5.07e+05m2/kg
DOI:10.13227/j.hjkx.201607123

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 135>

Accession number:20171003409541
Title:Photo-induced phosphate release from organic phosphorus decomposition driven by Fe(III)-oxalate complex in lake water
Authors:Jiang, Yong-Can (1); Peng, Yun-Xiao (1); Liu, Guang-Long (1, 2); Zhou, Yi-Yong (2); Zhu, Duan-Wei (1)
Author affiliation:(1) College of Resources &amp; Environment, Huazhong Agriculture University, Wuhan; 430070, China; (2) State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan; 430072, China
Corresponding author:Liu, Guang-Long(liugl@mail.hzau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:563-571
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The phosphate released from organic phosphorus photo-decomposition has a significantly influence on the phosphorus levels in the water column in lakes. In order to reveal the effect of organic phosphorus photo-decomposition on phosphate level in lake water, the phosphate released from organic phosphorus photo-decomposition driven by Fe(III)-oxalate complex under UV-Vis and sunlight irradiation was investigated in natural lake water using glyphosate as the model organic phosphorus. The effects of pH and initial concentration of Fe(III), oxalate and glyphosate on the phosphate released from glyphosate photolysis were studied. The results showed that phosphate could be released from glyphosate degradation by Fe(III)-oxalate complex under UV-Vis and sunlight irradiation. The concentration of phosphate reached 0.25 mg&middot;L<sup>-1</sup>and 0.18 mg&middot;L<sup>-1</sup>under UV-Vis and sunlight irradiation for 60 and 720 min, respectively. The amount of phosphate released increased with the increase of the initial concentration of Fe(III), as well as the increasing oxalate and glyphosate concentration in lake water. However, the increase of pH could significantly inhibit this process in the reaction system. The concentration of phosphorus decreased with the addition of isopropanol, which indicated that the hydroxyl radical (&middot;OH) was one of the main active oxygen species of Fe(III)-oxalate complex. The rates of &middot;OH production for Fe(III)-oxalate/UV-Vis and Fe(III)-oxalate/sunlight systems were 0.52&times;10<sup>-2</sup>&mu;mol&middot;(L&middot;min)<sup>-1</sup>and 0.03&times;10<sup>-2</sup>&mu;mol&middot;(L&middot;min)<sup>-1</sup>, respectively. The steady-state concentrations of hydroxyl radical (&middot;OH) for the Fe(III)-oxalate/UV-Vis conditions were 4.74&times;10<sup>-16</sup>mol&middot;L<sup>-1</sup>and 0.27&times;10<sup>-16</sup>mol&middot;L<sup>-1</sup>for the Fe(III)-oxalate/sunlight system. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Iron compounds
Controlled terms:Decay (organic) - Herbicides - Ionization of gases - Irradiation - Lakes - Oxalic acid - Phosphorus - Photolysis
Uncontrolled terms:Active oxygen species - Glyphosate degradation - Glyphosates - Hydroxyl radicals - Initial concentration - Organic phosphorus - Oxalate complexes - Steady state concentration
Classification code:802.2  Chemical Reactions - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 1.80e-04kg/m3, Mass_Density 2.50e-04kg/m3, Time 3.60e+03s, Time 4.32e+04s
DOI:10.13227/j.hjkx.201607035

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 136>

Accession number:20171003416408
Title:Optimization and validation of the analytical method to detect common illicit drugs in wastewater
Authors:Gao, Ting-Ting (1); Du, Peng (1); Xu, Ze-Qiong (1); Yang, Jun (2); Zhang, Hua-Fang (2); Li, Xi-Qing (1)
Author affiliation:(1) Laboratory of Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing; 100871, China; (2) Beijing Urban Drainage Monitoring Center Co., Ltd., Beijing; 100012, China
Corresponding author:Li, Xi-Qing(xli@urban.pku.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:201-211
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Illicit drugs have been recognized as a group of emerging pollutants. Based on previous research, procedures to pre-treat wastewater including SPE column, pH of water samples, and processes of washing, acidifying and re-dissolving were compared. It was found that the best recovery was achieved when wastewater was adjusted to pH=2 and Oasis MCX column was used. It was not necessary to flush the loaded column or to acidify the eluate prior to evaporation using nitrogen steam. After evaporation, it is recommended to redissolve the evaporated samples using 200 &mu;L acetonitrile and 100 &mu;L acetonitrile+100 &mu;L 5 mmol&middot;L<sup>-1</sup>ammonium acetate in Milli-Q water for HILIC-UPLC-MS/MS and C18-UPLC-MS/MS, respectively. After comparing retention times, limit of detection, limit of quantification, recoveries, and matrix effects of HILIC and C18 methods, C18-UPLC-MS/MS was chosen. Influent and effluent samples from 12 wastewater treatment plants in Beijing were analyzed using the optimized method for validation. The validated methods set a firm foundation to apply the sewage-based epidemiology to monitor illicit drug abuse in China. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Effluents
Controlled terms:Acetonitrile - Effluent treatment - Evaporation - Recovery - Sewage - Wastewater - Wastewater treatment
Uncontrolled terms:Analytical method - Emerging pollutants - Illicit drug - Limit of detection - Limit of quantifications - UPLC-MS/MS - Validated methods - Wastewater treatment plants
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Molar_Concentration 5.00e+00mol/m3, Volume 1.00e-07m3, Volume 2.00e-07m3
DOI:10.13227/j.hjkx.201606170

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 137>

Accession number:20171003416417
Title:Process of enrichment and culture of PAOs on a novel biofilm process of dephosphorization
Authors:Zheng, Ying (1, 2); Pan, Yang (1, 2, 3); Zhou, Xiao-Hua (1); Liao, Xuan-Hong (1, 2); Meng, Xuan (1, 2); Xia, Jian-Wei (4)
Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Environment Biotechnology Research Institute, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) Jiangsu Key Laboratory of Environment Science and Engineering, Suzhou; 215009, China; (4) The Environment Emergency and Accident Investigation Center of Suzhou, Suzhou; 215002, China
Corresponding author:Pan, Yang(panyang@mail.usts.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:276-282
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Using the hanging nylon as a biological carrier, a novel biofilm reactor was adopted to treat synthetic wastewater, and the feasibility of cultivating and enriching a high concentration of PAOs on this conventional biofilm within a short time was investigated, which was proved from the aspects of reactor's operational efficiency, the rate of phosphorus removal and the condition of PAOs enrichment. After 10d of operation, the rate of orthophosphate removal was higher than 95% in aerobic phase and the concentration of effluent COD was 50 mg&middot;L<sup>-1</sup>or less in the reactor,which was operated steadily for 50 d at this treatment level; after 48 d of operation, the reactor's phosphorus uptake rate and release rate were increased from 3.4 mg&middot;(L&middot;h)<sup>-1</sup>and 3.4 mg&middot;(L&middot;h)<sup>-1</sup>to 8 mg&middot;(L&middot;h)<sup>-1</sup>and 6 mg&middot;(L&middot;h)<sup>-1</sup>,respectively, and the aerobic and anaerobic cycles were shortened from equally 6 h to 2 h and 3 h, respectively. The fluorescence in situ hybridization (FISH) test found that the PAOs' abundance was increased from the original 48.96% to 70% on the 50th day, meanwhile the PAOs showed reunite chunk state in hybrid figure, the thickness of biofilm measured by direct microscopic process was about 28.9 &mu;m, which all proved that the PAOs in biofilm were at the end of the growth kinetics and the biofilm was mature. By hardening culture for 50d, a high concentration of 70% in full organisms of PAOs could be enriched in the conventional nylon filler, enabling the reactor to show a high efficiency in removal of phosphorus and organic matter from sewage. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Chemicals removal (water treatment)
Controlled terms:Biofilms - Biological water treatment - Blast enrichment - Carrier concentration - Efficiency - Effluent treatment - Effluents - Fillers - Fish - Fluorescence microscopy  - Growth kinetics - Phosphorus - Polyamides - Rayon - Sewage - Wastewater treatment
Uncontrolled terms:Biological carriers - Fluorescence in situ hybridization - Microscopic process - Operational efficiencies - Orthophosphate removals - PAOs - Phosphorus removal - Synthetic waste water
Classification code:445.1  Water Treatment Techniques - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 462.5  Biomaterials (including synthetics) - 701.1  Electricity: Basic Concepts and Phenomena - 804  Chemical Products Generally - 815.1.1  Organic Polymers - 819.2  Synthetic Fibers - 913.1  Production Engineering - 931.4  Quantum Theory; Quantum Mechanics
Numerical data indexing:Mass_Density 5.00e-02kg/m3, Percentage 4.90e+01% to 7.00e+01%, Percentage 7.00e+01%, Percentage 9.50e+01%, Size 2.89e-05m, Time 1.08e+04s, Time 2.16e+04s to 7.20e+03s
DOI:10.13227/j.hjkx.201607082

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 138>

Accession number:20171003416389
Title:Greenhouse gas fluxes at water-air interface in small pond using flux-gradient method based on spectrum analyzer
Authors:Zhao, Jia-Yu (1, 2); Zhang, Mi (2); Xiao, Wei (2); Wang, Wei (2); Wu, Hong-Yan (1); Zhang, Zhen (2); Xiao, Qi-Tao (2); Hu, Cheng (2); Yu, Zhou (2); Cao, Zheng-Da (2); Xu, Jing-Zheng (2); Liu, Shou-Dong (2); Li, Xu-Hui (2)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:41-51
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:As an important part of inland waters, small pond is a neglected source of greenhouse gas. The main objective of the study was to quantify greenhouse gas fluxes (CO<inf>2</inf>and CH<inf>4</inf>) from small pond in the Yangtze Delta using flux-gradient method. The results showed that: &#9312; zero-gradient test indicated that the flux measurement precision for water vapor, CO<inf>2</inf>, and CH<inf>4</inf>was 7.525 W&middot;m<sup>-2</sup>, 0.022 mg&middot;(m<sup>2</sup>&middot;s)<sup>-1</sup>, and 0.054 &mu;g&middot;(m<sup>2</sup>&middot;s)<sup>-1</sup>, respectively. During the test period, 84%, 80%, and 94% of half-hourly flux data for H<inf>2</inf>O, CO<inf>2</inf>, and CH<inf>4</inf>were higher than the zero-gradient measurement precision. &#9313;Based on the measurement, the small pond was the source of CO<inf>2</inf>and CH<inf>4</inf>for the atmosphere in summer, the mean emission flux of CO<inf>2</inf>and CH<inf>4</inf>was 0.038 mg&middot;(m<sup>2</sup>&middot;s)<sup>-1</sup>and 0.889 &mu;g&middot;(m<sup>2</sup>&middot;s)<sup>-1</sup>, respectively. The CH<inf>4</inf>emission fluxes from the small pond were more higher than the median value of emission for global lakes. The results indicated that greenhouse gas emission from small pond was an important part for estimating inland water greenhouse gas emissions, especially for CH<inf>4</inf>emission. These results can provide scientific reference for making emission inventory of regional greenhouse gas. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Phase interfaces
Controlled terms:Carbon dioxide - Gas emissions - Gases - Gradient methods - Greenhouse gases - Lakes - Spectrum analyzers
Uncontrolled terms:Eddy covariance method - Emission fluxes - Emission inventories - Flux measurements - Flux-gradient methods - Greenhouse gas fluxes - Scientific references - Water-air interface
Classification code:451.1  Air Pollution Sources - 801.4  Physical Chemistry - 804.2  Inorganic Compounds - 921.6  Numerical Methods
Numerical data indexing:Percentage 8.00e+01%, Percentage 8.40e+01%, Percentage 9.40e+01%, Surface_Power_Density 7.53e+00W/m2
DOI:10.13227/j.hjkx.201605142

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 139>

Accession number:20171003416427
Title:Fractions transformation of heavy metals in compound contaminated soil treated with biochar, montmorillonite and mixed addition
Authors:Gao, Rui-Li (1); Tang, Mao (1); Fu, Qing-Ling (1); Guo, Guang-Guang (1); Li, Xiao (1); Hu, Hong-Qing (1)
Author affiliation:(1) College of Resources and Environment, Huazhong Agricultural University, Wuhan; 430070, China
Corresponding author:Hu, Hong-Qing(hqhu@mail.hzau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:361-367
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A compound contaminated soil sampled from Lingxiang City, Hunan Province, was used to investigate the effects of biochar (BC) and montmorillonite (MM) addition on heavy metals fractions. The addition amounts of BC and MM were 1%, 2%, 5%, respectively, and the mixture treatment was 1% BC+1% MM. BCR(European Community Bureau of Reference) sequential extraction method was used to assess the fractions of heavy metals in soil after incubation. The results indicated that adding BC alone significantly reduced the available contents of Pb, Cu and Cd. Among montmorillonite treatments, MM5% treatment decreased the weak acid extractable content of Cu, Pb, Zn, Cd by 27.6%, 19.2%, 25.6%, 19.2%, respectively. BC+MM treatment worked well, decreased the weak acid extractable content of Cu,Pb, Zn, Cd by 15.8%, 15.9%, 13.1%, 12.0%, and increased the residual content by 39.0%, 110.1%, 9.6%, 62.5%, significantly reducing the mobility of the four elements. For the stabilization effect, MM treatment worked better than BC treatment, and a combination of two amendments worked the best. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Soil pollution
Controlled terms:Aluminum corrosion - Biochemistry - Clay minerals - Extraction - Heavy metals - Lead - Soils - Stabilization - Zinc
Uncontrolled terms:Bioavailability - Contaminated soils - Continuous extraction - European community bureau of references - Heavy metals in soil - Mixture treatments - Sequential extraction method - Stabilization effects
Classification code:482.2  Minerals - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 539.1  Metals Corrosion - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 801.2  Biochemistry - 802.3  Chemical Operations
Numerical data indexing:Percentage 1.00e+00%, Percentage 1.10e+02%, Percentage 1.20e+01%, Percentage 1.31e+01%, Percentage 1.58e+01%, Percentage 1.59e+01%, Percentage 1.92e+01%, Percentage 2.00e+00%, Percentage 2.56e+01%, Percentage 2.76e+01%, Percentage 3.90e+01%, Percentage 5.00e+00%, Percentage 6.25e+01%, Percentage 9.60e+00%
DOI:10.13227/j.hjkx.201606018

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 140>

Accession number:20171003409556
Title:Highly efficient bioflocculation of microalgae using Mucor circinelloides
Authors:Gu, Qiong (1); Jin, Wen-Biao (1); Chen, Yuan-Qing (1); Guo, Shi-Da (1); Wan, Chao-Fan (1)
Author affiliation:(1) School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen; 518055, China
Corresponding author:Jin, Wen-Biao(13828830095@139.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:688-696
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Harvesting of microalgae is the major challenge in cost-efficient large-scale microalgal biomass production due to their low concentration and small cell size in the culture medium. The present paper aimed to study the efficiency of the filamentous fungus Mucor circinelloides spores suspensions to harvest the green unicellular microalga Chlorella pyrenoidosa grown in synthetic medium. Results showed that the optimal co-culture conditions were pH=6.0, 1.25 g&middot;L<sup>-1</sup>glucose and 1&#8758;250 fungi to microalgae ratio with harvest efficiency of 91.08%. In addition, the mentioned optimal conditions could be applied for actual sewage with harvest efficiency of 92.33%. Polysaccharide concentrations measured before and after 48 h of cultivation showed that the polysaccharide of C. pyrenoidosa cultured alone was increased by 0.047 g&middot;L<sup>-1</sup>, while co-cultured mixture showed increase in polysaccharides by 0.019 g&middot;L<sup>-1</sup>. The recorded decrease in polysaccharides concentration in the co-culture might be attributed to using of excreted polysaccharides by M. circinelloides to grow, confirming the symbiotic association of both organisms. Furthermore, with decreasing the pH, C. pyrenoidosa Zeta potential was stable, while it was increased from -37.7 mV to -9.87 mV in M. circinelloides, which indicated that charge neutralization was the mechanism of flocculation between algae and fungi. &copy; 2017, Science Press. All right reserved.
Number of references:16
Main heading:Algae
Controlled terms:Efficiency - Fungi - Harvesting - Mechanisms - Microorganisms - Polysaccharides - Sewage
Uncontrolled terms:Charge neutralization - Chlorella pyrenoidosa - Filamentous fungi - Mechanism of flocculation - Micro-algae - Mucor circinelloides - Symbiotic association - Unicellular microalga
Classification code:452.1  Sewage - 461.9  Biology - 601.3  Mechanisms - 804.1  Organic Compounds - 821.3  Agricultural Methods - 913.1  Production Engineering
Numerical data indexing:Mass_Density 1.25e+00kg/m3, Mass_Density 1.90e-02kg/m3, Mass_Density 4.70e-02kg/m3, Percentage 9.11e+01%, Percentage 9.23e+01%, Time 1.73e+05s, Voltage -9.87e-03V
DOI:10.13227/j.hjkx.201607217

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 141>

Accession number:20171003409566
Title:Effects of biochar pyrolyzed at varying temperatures on soil organic carbon and its components: influence on the composition and properties of humic substances
Authors:Zhao, Shi-Xiang (1); Yu, Xiao-Ling (1); Li, Zhong-Hui (1); Yang, Yan (1); Zhang, Xia (1); Wang, Xu-Dong (1, 2); Zhang, A-Feng (1)
Author affiliation:(1) College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China; (2) Key Laboratory Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China
Corresponding author:Wang, Xu-Dong(wangxudong01@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:769-782
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Application of biochar (BC) is an important way to increase soil organic carbon sequestration. At the same time, the effect of BC on fractions and properties of soil humic substances is concerned. A laboratory experiment was conducted to study the influences of BC pyrolyzed at different temperatures on the composition and properties of humic substances. The modified method for the extraction and fractionation of humic substances was adopted in this work. The carbon (C) contents of Humin (Hu), Humic acids (HA), Fulvic acids (FA) were analyzed by the thermal oxidation of K<inf>2</inf>Cr<inf>2</inf>O<inf>7</inf>and TOC analyzer, and the optical properties of HA and FA were measured by using spectrophotometer. The results showed that the increasing temperature (from 300 to 600&#8451;) decreased like-humic substances (LHS) from 10.93 g&middot;kg<sup>-1</sup>to 0.26 g&middot;kg<sup>-1</sup>, while the structure of theLHS tended to be complicated. Compared with control treatment (CK), the addition of BC produced under 400&#8451; increased the contents of HA and FA (after 240 d incubation a lower FA content was found in treatments) and increased as BC application rate increased, after 360 d of incubation, BC300 and BC400 significantly increased by 69.93% and 48.75% for HA (P&lt;0.05), while decreased by 1.35% and 5.19% for FA. Higher contents of HA and FA were found in soil samples amended with BC prepared at above 400&#8451; only during the initial period of 3-10 d of incubation and increased as BC application rate increased, at the end of the incubation, the contents of HA and FA significantly decreased by 34.38%, 44.48% in BC500 treatments and 42.84%, 49.27% in the BC600 treatments (P&lt;0.05). During the incubation, the addition of BC significantly increased the contents of Hu (P&lt;0.05), and the treatments amended with BC500 were the highest. The addition of BC decreased the relative contents of HA and FA, while increased the relative content of Hu, indicating that the proportion of relatively stable organic carbon in the soil was increased. The ratio of HA/FA (H/F) varied between 0.88 and 2.52 and increased with decreasing pyrolysis temperature and increasing BC application. A significantly lower color tonal coefficient (&Delta;lgK) and E<inf>4</inf>/E<inf>6</inf>values in treatments amended with BC produced at temperatures above 400&#8451;, indicating that higher temperatures derived BC complicated the structure of soil humic substance, while an opposite rend was observed in treatments amended with BC produced at temperatures under 400&#8451;. Considering the improvement of the stability of organic carbon, when the BC products were applied to the Loutu soil, 500&#8451; was the optimal temperature for preparing apple-derived BC not only because it could significantly increase the content of inert soil organic carbon, but also improve the quality of the soil as a result of enhancing the degree of soil humification. &copy; 2017, Science Press. All right reserved.
Number of references:42
Main heading:Organic carbon
Controlled terms:Biological materials - Optical properties - Organic acids - Photodegradation - Pyrolysis - Soils - Thermooxidation
Uncontrolled terms:Bio chars - Fulvic acids - Humic acid - Humic substances - Humin
Classification code:461.2  Biological Materials and Tissue Engineering - 483.1  Soils and Soil Mechanics - 741.1  Light/Optics - 802.2  Chemical Reactions - 804.1  Organic Compounds
Numerical data indexing:Percentage 1.35e+00%, Percentage 3.44e+01%, Percentage 4.28e+01%, Percentage 4.45e+01%, Percentage 4.88e+01%, Percentage 4.93e+01%, Percentage 5.19e+00%, Percentage 6.99e+01%
DOI:10.13227/j.hjkx.201604059

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 142>

Accession number:20171003416413
Title:Characteristics of perchlorate reduction and analysis of consortium structure in a sulfur-based reactor at a high perchlorate concentration
Authors:Zhang, Chao (1); Tao, Hua-Qiang (2); Song, Yuan-Yuan (2); Lu, Cai-Cai (2); Guo, Yan-Kai (1); Lian, Jing (1); Guo, Jian-Bo (2)
Author affiliation:(1) Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environment Science and Engineering, Hebei University of Science and Technology, Shijiazhuang; 050018, China; (2) Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin; 300384, China
Corresponding author:Guo, Jian-Bo(jianbguo@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:247-252
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The effects of perchlorate concentration and hydraulic retention time (HRT) on perchlorate reduction characteristics were investigated in a sulfur-based perchlorate reduction reactor. The results showed that the perchlorate was completely removed at HRT of 12 h and the influent perchlorate concentration ranged from 50 mg&middot;L<sup>-1</sup>to 194 mg&middot;L<sup>-1</sup>; The perchlorate removal efficiency was 74% at HRT of 4 h and the influent perchlorate concentration was 194 mg&middot;L<sup>-1</sup>; The yield of sulfate was increased by increasing the influent perchlorate concentration and HRT; The influent pH and alkalinity was approximately 8.0 and 500 mg&middot;L<sup>-1</sup>CaCO<inf>3</inf>, and the effluent pH and alkalinity was approximately 6.7 and 100 mg&middot;L<sup>-1</sup>CaCO<inf>3</inf>, respectively; The oxidation reduction potential (ORP) ranged from -380 mV to -330 mV at the bottom of the reactor, however, ORP ranged from -300 mV to -250 mV at the top of the reactor; The molecular biological analysis showed that the microbial consortium structure was different along the flow path in the reactor, Sulfurovum which is known to oxidize sulfur was decreased from 57.78% to 32.19% and Hydrogenophilaceae which is known to oxidize hydrogen sulfide was increased from 4.35% to 22.24%. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Inorganic compounds
Controlled terms:Alkalinity - Calcium carbonate - Desulfurization - Hydrodesulfurization - Oxidation - pH - pH effects - Redox reactions - Sulfur
Uncontrolled terms:Biological analysis - Hydraulic retention time - Microbial consortia - Oxidation reduction potential - Perchlorate - Perchlorate concentration - Perchlorate removal - Structure analysis
Classification code:801.1  Chemistry, General - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.00e-01kg/m3, Mass_Density 5.00e-01kg/m3, Mass_Density 6.70e-03kg/m3, Mass_Density 8.00e-03kg/m3, Percentage 4.35e+00% to 2.22e+01%, Percentage 5.78e+01% to 3.22e+01%, Percentage 7.40e+01%, Time 1.44e+04s, Time 4.32e+04s, Voltage -2.50e-01V, Voltage -3.30e-01V
DOI:10.13227/j.hjkx.201607010

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 143>

Accession number:20171003409563
Title:Effect of reclaimed water on bacterial community composition and function in urban river sediment
Authors:Di, Yan-Ming (1, 2); Wang, Guang-Xuan (1, 2); Huang, Xing-Ru (1, 2); Guo, Xiao-Yu (1, 2)
Author affiliation:(1) College of Resources Environment and Tourism, Capital Normal University, Beijing; 100048, China; (2) Urban Environmental Processes and Digital Modeling Laboratory, Beijing; 100048, China
Corresponding author:Guo, Xiao-Yu(xiaoyucnu@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:743-751
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the effect of reclaimed water on bacterial community composition and function in urban river sediment, the changes of bacteria community diversity, composition and function in Mayu wetland upon the supply of reclaimed water were investigated by a range of sophisticated procedures, including Terminal Restriction Fragment Length Polymorphism(T-RFLP), 16S rRNA clone library technology, and Real-time Quantitative PCR Detecting System(qPCR).The results showed that carbon, nitrogen and phosphorus were major factors driving the variation of bacterial diversity and community structure in river sediment, and the bacteria were gradually recovered after purification in downstream under the effect of artificial wetland. In addition, the bacterial community in reclaimed water outfall was mainly constituted by &beta;-Proteobacteria, &delta;-Proteobacteria, Bacteroidales and Cyanobacteriain, and &Epsilon;-Proteobacteria, Chloroflexi and Spirochaetes were unique groups. Besides, the major biological geochemical cycle was nitrogen, carbon and phosphorus cycle in river sediment, which was closely related to functional genes. There were about 45.9% of the clones related to nitrogen cycle in reclaimed water outfall, such as Comamonas sp., higher than those of upstream and downstream (27.7% and 23.4%), 17.9% of the clones were closely related to the carbon cycle, such as Lysobacter sp., higher than those of upstream and downstream (14.4% and 12.9%). Furthermore, the trace of pathogenic bacteria and antibiotics in reclaimed water also changed the transformation pattern participating in carbon and nitrogen cycle, for example, Rhodocyclus sp. conducted nitrogen fixation by photosynthesis in reclaimed water outfall, whereas Burkholderia sp. fixes nitrogen by ways of plants symbiotic nitrogen fixation in upstream and downstream. This research provides theoretical reference for studies on remediation of reclaimed water supplying river by artificial wetland. &copy; 2017, Science Press. All right reserved.
Number of references:42
Main heading:Rivers
Controlled terms:Bacteria - Cloning - Forestry - Genes - Nitrogen - Nitrogen fixation - Outfalls - Phosphorus - Polymerase chain reaction - Reclamation  - RNA - Sediments - Water resources - Wetlands
Uncontrolled terms:16S rRNA - Bacterial community - Functional genes - Re-claimed water - T-RFLP - Urban river
Classification code:444  Water Resources - 452.1  Sewage - 461.2  Biological Materials and Tissue Engineering - 461.8.1  Genetic Engineering - 483  Soil Mechanics and Foundations - 801.2  Biochemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.29e+01%, Percentage 1.44e+01%, Percentage 1.79e+01%, Percentage 2.34e+01%, Percentage 2.77e+01%, Percentage 4.59e+01%
DOI:10.13227/j.hjkx.201606089

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 144>

Accession number:20171003416394
Title:Seasonal variation of colloid particles in the shallow well water of a small watershed of purple soil
Authors:Zhang, Wei (1, 2); Tang, Xiang-Yu (2); Xian, Qing-Song (2, 3)
Author affiliation:(1) School of Tourism and Land Resource, Chongqing Technology and Business University, Chongqing; 400067, China; (2) Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Tang, Xiang-Yu(xytang@imde.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:87-94
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Colloids are the major carriers of various contaminants during the downward transport into groundwater. To explore the long-term dynamics of colloid in the groundwater and its influencing factors, a one-year monitoring of colloid concentration and water physicochemical parameters was carried out in the shallow wells in a purple soil dominated watershed in the hilly region of central Sichuan. The results indicated that colloid concentrations within a year had a strong seasonal variation with the coefficient of variation being larger than 0.5. The maximum of colloid mass concentration could reach as high as 14.68 mg&middot;L<sup>-1</sup>(the corresponding number concentration being 1.34&times;10<sup>9</sup>L<sup>-1</sup>), which occurred in the non-rainy season and was caused by the physical perturbations from water taken. Physical perturbations of rainfall led to the distinct peaks of colloid concentrations in the well water at the early stages of rainy season while it did not occur at the end of the rainy season even upon heavy storm. Water chemistries (EC, Ca<sup>2+</sup>, Mg<sup>2+</sup>, DOC) showed the dominant role in determining colloid concentrations and status in the well. The facilitated transport of contaminants (i.e. pesticides and heavy metals) due to the increased colloids in the shallow well water at the early stages of rainy season would potentially pose a great threat to the drinking water safety in the study area. Therefore, it is strongly suggested to increase the monitoring frequencies in terms of colloid concentrations and well water physicochemical parameters following the large rainfall events during this period. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Colloids
Controlled terms:Groundwater - Groundwater pollution - Heavy metals - Particle size - Particle size analysis - Potable water - Rain - Soils - Surface waters - Water  - Watersheds
Uncontrolled terms:Coefficient of variation - Colloid concentration - Facilitated transport - Mass concentration - Number concentration - Physicochemical parameters - Purple soils - Seasonal dynamics
Classification code:443.3  Precipitation - 444  Water Resources - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 801.3  Colloid Chemistry - 951  Materials Science
Numerical data indexing:Mass_Density 1.47e-02kg/m3
DOI:10.13227/j.hjkx.201607070

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 145>

Accession number:20171003416410
Title:Effect of PVDF hollow fiber ultrafiltration membranes modification with carbonnanotube on membrane fouling control during ultrafiltration of sewage effluent
Authors:Wang, Li-Ying (1); Shi, Jie (1); Wang, Kai-Lun (1); Guan, Yu-Qi (1); Guo, Jin (1)
Author affiliation:(1) School of Environmental and Energy Engineering, Beijing University of Technology, Beijing; 100124, China
Corresponding author:Guo, Jin(guojin@bjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:220-228
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The modification of hollow fiber ultrafiltration membranes with carbon nanotube (CNTs) on fouling control was investigated. Considering the antifouling ability of the CNT-modified membranes and the stability of CNTs layer, several factors were analyzed and evaluated, including the concentration of ethanol-dispersion, the diameter of CNTs, and the loading mass of CNTs. Besides, DOC, UV<inf>254</inf>, and fluorescence characteristics of the permeate from the CNT-modified membrane were analyzed. The results revealed that the optimal modification method included a 50%(volume fraction) ethanol-dispersion,a 30-50 nm diameter-CNTs, and 3 g&middot;m<sup>-2</sup>CNTs' loading. Compared with the virgin membrane, the removal rates of DOC and UV<inf>254</inf>by the CNT-modified membrane were increased by 37% and 56%, respectively. Meanwhile, it was proved that the humic-like and protein-like materials were more easily removed by the CNT-modified membrane. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Carbon nanotubes
Controlled terms:Ethanol - Membrane fouling - Membranes - Nanotubes - Sewage - Ultrafiltration - Yarn
Uncontrolled terms:Anti-fouling ability - Fluorescence characteristics - Fouling control - Membrane modification - Modification methods - Modified membranes - Sewage effluents - Ultra-filtration membranes
Classification code:452.1  Sewage - 761  Nanotechnology - 802.3  Chemical Operations - 804.1  Organic Compounds - 819.4  Fiber Products - 951  Materials Science
Numerical data indexing:Percentage 3.70e+01%, Percentage 5.60e+01%, Size 3.00e-08m to 5.00e-08m
DOI:10.13227/j.hjkx.201603008

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 146>

Accession number:20171003409539
Title:Response of the water quality of a stratified reservoir to an extreme El Ni&ntilde;o event during summer
Authors:Qiu, Xiao-Peng (1); Huang, Ting-Lin (1); Zeng, Ming-Zheng (1); Shi, Jian-Chao (1); Cao, Zhan-Hui (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:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:547-554
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Global warming can intensify the El Ni&ntilde;o phenomenon that recurs every 2-7 years, which will lead to a great interannual variability of climate and may induce the deterioration of the water quality of reservoirs. To study the influence of the extreme El Ni&ntilde;o events on the water quality of stratified reservoirs during summer, field surveys were conducted in Zhoucun Reservoir and its inflow rivers from May to August in a normal year (2012) and a strong El Ni&ntilde;o year (2015). Temporal variations of physical and chemical index were investigated during monitoring. The results showed that the Zhoucun Reservoir was stratified during the study period. The precipitation in the summer of the normal year was significantly higher than that in the El Ni&ntilde;o year at the same period. In the summer of the normal year, the water level increased from 124.26 m to 127.14 m and the hypolimnion thickness increased by 3.1 m. However, in 2015, the rapid decrease of the water level from May to August (from 121.65 m to 119.46 m) led to the decrease of the hypolimnion thickness (by 3.2 m). The inflow rivers belonged to surface current and its nutrients concentrations were obviously higher than those in the epilimnion. The inflow nutrients loads increased significantly in the summer of the normal year, as a result, total nitrogen increased from 1.00 mg&middot;L<sup>-1</sup>to 2.06 mg&middot;L<sup>-1</sup>, nitrate increased from 0.19 mg&middot;L<sup>-1</sup>to 1.28 mg&middot;L<sup>-1</sup>, and total phosphorus increased from 0.023 mg&middot;L<sup>-1</sup>to 0.088 mg&middot;L<sup>-1</sup>in the lacustrine zone of the reservoir. In contrast, the nutrients concentrations changed little in the summer of the El Ni&ntilde;o year due to the decrease in runoff. Nonetheless, the reducing pollutants concentrations of the hypolimnion in the El Ni&ntilde;o year were significantly higher than those in the normal year, which may be due to the temporal variations of hypolimnion thicknesses. The maximum concentrations of iron, manganese, ammonium and sulfide in the summer of the El Ni&ntilde;o year were 0.38, 1.36, 2.36 and 1.67 mg&middot;L<sup>-1</sup>, respectively. All these index exceeded the standards for surface water Class III. We conclude that the extreme El Ni&ntilde;o event has an apparent influence on the nutrients concentrations in the epilimnion and the pollutants concentrations in the hypolimnion in Zhoucun Reservoir. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:River pollution
Controlled terms:Global warming - Nickel - Nutrients - Pollution - Reservoirs (water) - Surface waters - Temperature distribution - Thermal stratification - Water levels - Water quality
Uncontrolled terms:Chemical indices - Hypolimnion - Interannual variability - Maximum concentrations - Nutrients concentrations - Stratified reservoirs - Temporal variation - Total phosphorus
Classification code:441.2  Reservoirs - 443.1  Atmospheric Properties - 444.1  Surface Water - 445.2  Water Analysis - 453  Water Pollution - 548.1  Nickel - 641.1  Thermodynamics
Numerical data indexing:Age 2.00e+00yr to 7.00e+00yr, Mass_Density 1.00e-03kg/m3 to 2.06e-03kg/m3, Mass_Density 1.67e-03kg/m3, Mass_Density 1.90e-04kg/m3 to 1.28e-03kg/m3, Mass_Density 2.30e-05kg/m3 to 8.80e-05kg/m3, Mass_Density 2.36e-03kg/m3, Size 1.22e+02m to 1.19e+02m, Size 1.24e+02m to 1.27e+02m, Size 3.10e+00m, Size 3.20e+00m
DOI:10.13227/j.hjkx.201608001

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 147>

Accession number:20171003416395
Title:Deposition characteristics of suspended solids and the response of dissolved nutrients in spring in the western lakeside of Taihu Lake
Authors:Qi, Chuang (1); Wang, Guo-Xiang (2, 3); Wu, Xin-Ting (2); Xu, Xiao-Guang (2, 3); Han, Rui-Ming (2, 3); Wu, Song-Jun (2)
Author affiliation:(1) School of Geography Science, Nanjing Normal University, Nanjing; 210097, China; (2) School of Environment, Nanjing Normal University, Nanjing; 210097, China; (3) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Institute of Water Environmental Eco-remediation, Nanjing; 210023, China
Corresponding author:Wang, Guo-Xiang(wangguoxiang@njnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:95-103
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To reveal the spatiotemporal characteristics of nutrients in the deposition process of suspended solids in lakeside zone, in situ deposition tests were performed in the western lakeside of Taihu Lake, and the contents of TP, TN, NH<inf>4</inf><sup>+</sup>-N and NO<inf>3</inf><sup>-</sup>-N were measured and analyzed. The results showed that the deposition fluxes in the western lakeside of Taihu Lake ranked as follows: artificial reed areas&gt;non-vegetation nearshore areas&gt;natural reed areas&gt;non-vegetation offshore areas, with their average values of (1 383.40&plusmn;925.60), (1 208.67&plusmn;743.50), (278.72&plusmn;142.53), (245.58&plusmn;154.25) g&middot;(m<sup>2</sup>&middot;d)<sup>-1</sup>, respectively. From the 6th day, the deposition volume steadily increased, with the deposition rate larger than the decomposition rate. Through the 15-day continuous in situ observation, the content of TP in nearshore zone was 2-3 folds larger than that of offshore zone, and the content of NH<inf>4</inf><sup>+</sup>-N was significantly different from that of NO<inf>3</inf><sup>-</sup>-N in the settlement bottle (P&lt;0.01). The deposition volume was significantly and positively correlated to both TN and NH<inf>4</inf><sup>+</sup>-N contents in the water column (P&lt;0.01, n=42), suggesting that the TN and NH<inf>4</inf><sup>+</sup>-N contents in the overlying water increased with the deposition fluxes. The correlation coefficient between TN and NH<inf>4</inf><sup>+</sup>-N was 0.84, implicating that the increase of deposition flux may accelerate the mutual transformation between different forms of nitrogen. These findings should be taken into account in the current control of black blooms and nutrient management in Taihu Lake. &copy; 2017, Science Press. All right reserved.
Number of references:49
Main heading:Deposition
Controlled terms:Bottles - Deposition rates - Lakes - Nutrients - Vegetation
Uncontrolled terms:Correlation coefficient - Deposition characteristics - Deposition fluxes - In-situ observations - Lakeside - Mutual transformations - Spatiotemporal characteristics - Taihu lakes
Classification code:694.2  Packaging Materials - 802.3  Chemical Operations
Numerical data indexing:Age 4.11e-02yr
DOI:10.13227/j.hjkx.201607102

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 148>

Accession number:20171003409568
Title:Comparative analysis on effect of wheat straw and its biochar amendment on net global warming potential under wheat-maize rotation ecosystem in the Guanzhong Plain
Authors:Cheng, Gong (1, 3); Chen, Jing (1, 3); Liu, Jing-Jing (2); Zhang, A-Feng (1, 3); Wang, Xu-Dong (1, 3); Feng, Hao (2); Zhao, Ying (1)
Author affiliation:(1) College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China; (2) College of Water Resources and Architectural Engineering, Northwest A&amp;F University, Yangling; 712100, China; (3) Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China
Corresponding author:Zhang, A-Feng(zhangafeng@nwsuaf.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:792-801
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to compare the differences in carbon sequestration and greenhouse gas mitigation between straw and straw-derived biochar amendment, a field experiment was conducted with simultaneous measurement of carbon dioxide (CO<inf>2</inf>), methane (CH<inf>4</inf>) and nitrous oxide (N<inf>2</inf>O) emissions, crop yield, soil organic carbon (SOC) content and net global warming potential (NGWP) in a wheat-maize rotation cropping system from the loess plateau of China. Five treatments were included: control (no straw incorporation, no straw-derived biochar amendment and no fertilization, CK), fertilization (no straw incorporation and no straw-derived biochar amendment, F), straw with fertilization (wheat straw incorporated at 8 t&middot;hm<sup>-2</sup>, FS), low straw-derived biochar (8 t&middot;hm<sup>-2</sup>) with fertilization (FBlow) and high straw-derived biochar (16 t&middot;hm<sup>-2</sup>) with fertilization (FBhigh). Wheat yield increased by 30.9%, 66.3% and 36.6% under FS, FBlow and FBhigh treatment, as compared to the F treatment, respectively. However, maize yield decreased by 14.1%, 18.0% and 24.6% under FS, CK and FBhigh treatment as compared to the F treatment, respectively. There was no significant difference between FBlow and F treatment. Annual CO<inf>2</inf>emission increased by 60.2% under FS treatment, but decreased by 14.4% under FBhigh treatment as compared to the F treatment, respectively. Annual N<inf>2</inf>O emission decreased by 27.6% and 38.7% under FBlow and FBhigh treatment as compared to the F treatment, respectively. However, no significant difference was observed under straw application. Overall, the NGWP decreased by 24.13 and 58.44 t&middot;hm<sup>-2</sup>under FBlow and FBhigh treatment as compared to the F treatment, respectively. And the NGHGI decreased by 1.78 and 5.06 t&middot;t<sup>-1</sup>under FBlow and FBhigh treatment as compared to the F treatment, respectively. In summary, we conclude that the fertilization with 16 t&middot;hm<sup>-2</sup>biochar amendment can be used as an effective management to improve the crop yield and reduce the net global warming potential under the wheat-maize rotation system. &copy; 2017, Science Press. All right reserved.
Number of references:44
Main heading:Organic carbon
Controlled terms:Agriculture - Carbon dioxide - Crops - Gas emissions - Global warming - Greenhouse gases - Nitrogen oxides - Rotation - Soil surveys - Straw
Uncontrolled terms:Bio chars - Global warming potential - Soil organic carbon - Wheat straws - Wheat-maize rotation system
Classification code:443.1  Atmospheric Properties - 451.1  Air Pollution Sources - 483.1  Soils and Soil Mechanics - 804.1  Organic Compounds - 804.2  Inorganic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 931.1  Mechanics
Numerical data indexing:Percentage 1.41e+01%, Percentage 1.44e+01%, Percentage 1.80e+01%, Percentage 2.46e+01%, Percentage 2.76e+01%, Percentage 3.09e+01%, Percentage 3.66e+01%, Percentage 3.87e+01%, Percentage 6.02e+01%, Percentage 6.63e+01%
DOI:10.13227/j.hjkx.201607071

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 149>

Accession number:20172603860996
Title:Characteristics and Influencing Factors of Biologically-based Phosphorus Fractions in the Farmland Soil
Authors:Cai, Guan (1, 2); Hu, Ya-Jun (3); Wang, Ting-Ting (3); Yuan, Hong-Zhao (2, 3); Wang, Jiu-Rong (2, 3); Li, Qiao-Yun (1); Ge, Ti-Da (3); Wu, Jin-Shui (3)
Author affiliation:(1) College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha; 410128, China; (2) Public Service Technology Center, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (3) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China
Corresponding author:Li, Qiao-Yun(1753994368@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1606-1612
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A suitable fractionation method of phosphorus (P) is a key to effective assessment of soil P componential features. Here a new biologically-based P (BBP) method was used to evaluate the P fractions in the upland and paddy soils across large-scale area in China. The soil P was divided into four components: (1) soluble or rhizosphere-intercepted (CaCl<inf>2</inf>-P), (2)organic acid activated and inorganic weakly bound (Citrate-P), (3) enzyme mineralization of organic P (Enzyme-P), (4)potential activation of inorganic P (HCl-P). Then, the relationships between biologically-based P fractions and standard Olsen-P were investigated, and driving factors of P fractions were identified. The results showed that P content was in order of HCl-P&gt;Citrate-P&gt;Enzyme-P&gt;CaCl<inf>2</inf>-P. All P components of upland soil displayed higher levels than those of paddy soil. Moreover, the P components were highly positively correlated with the Olsen-P, suggesting that each P component contributed to soil P availability. However, it was found that Olsen-P was most highly correlated with CaCl<inf>2</inf>-P and Enzyme-P (R<sup>2</sup>=0.359; R<sup>2</sup>=0.386) in upland soil, while Olsen-P was most highly with Citrate-P (R<sup>2</sup>=0.788) in paddy soil. This result indicated that available P of upland soil was mainly from organic P mineralization and soluble P, and available P in paddy soil was mainly from inorganic P activation. Redundancy analysis (RDA) showed that the P components were mainly affected by soil pH and silt content, which suggested that it could enhance the P availability via regulating soil pH in the agricultural activities. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Soils
Controlled terms:Chemical activation - Enzymes - Landforms - Mineralogy - Phosphorus
Uncontrolled terms:Bio-availability - Environmental factors - Paddy soils - Phosphorus fractionation - Upland soil
Classification code:481.1  Geology - 482  Mineralogy - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201608178

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 150>

Accession number:20172603860786
Title:Brief Introduction of Pollution Sites Remediation and Risk Assessment and Its Policy Making in United States
Authors:Rong, Yue (1)
Author affiliation:(1) California Regional Water Quality Control Board, Los Angeles Region, Los Angeles; CA; 90013, United States
Corresponding author:Rong, Yue(Yrong20373@aol.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1726-1732
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Site remediation has become an imperative part of environmental protection in China due to recent economic development, urban spreading, new industries replacing old ones, relocation of old industrial sites, and increased environmental conscience. This paper mainly introduced the concept, method, calculation, risk assessment and management for polluted sites remediation based on experience from California, USA. Further, the paper presented the concept of vapor intrusion and how to use vapor intrusion methodology to determine site remediation standard. Mathematical modeling approaches were also discussed in terms of how to determine the residual pollutant concentrations in soil and how to calculate indoor vapor concentrations. Based on risk assessment, California Environmental Protection Agency, Water Resources Control Board issued a 'Low Threat Underground Storage Tank Case Closure Policy'for impacted underground storage tank sites. The numerical criteria in the Policy were based on calculations of human health risk assessment. Finally, a real case study in California, USA, was presented to demonstrate how the risk assessment calculations were applied in polluted site remediation, which helps to answer the question of 'how clean is clean'. &copy; 2017, Science Press. All right reserved.
Number of references:8
Main heading:Land reclamation
Controlled terms:Environmental protection - Environmental Protection Agency - Groundwater resources - Health risks - Indoor air pollution - Mercury (metal) - Pollution - Risk assessment - Risks - Soil pollution  - Tanks (containers) - Urban growth - Water resources
Uncontrolled terms:Polluted sites - Site cleanup - Site remediation - Soil gas samplings - Vapor intrusion
Classification code:403.1  Urban Planning and Development - 442.2  Land Reclamation - 444  Water Resources - 444.2  Groundwater - 451  Air Pollution - 454.2  Environmental Impact and Protection - 461.7  Health Care - 483.1  Soils and Soil Mechanics - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 619.2  Tanks - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201612068

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 151>

Accession number:20172603860997
Title:Effect of Straw Application on the Dynamics of Exogenous Nitrogen and Microbial Activity in Paddy Soil
Authors:Chen, Shan (1, 2); Ding, Xian-Qing (1, 2); Zhu, Zhen-Ke (2); Wang, Juan (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:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1613-1621
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Returning straw to the field provides an important source of fertilizer that can increase soil fertility. However, the rate of straw carbon utilization is low and large amounts of greenhouse gases are emitted due to the high carbon to nitrogen ratio of the straw mass. In this regard, the application of inorganic nitrogen and phosphate fertilizers can control the ratio of elements in the soil, increase the activity of microorganisms and their utilization of elements, and promote the improvement of soil fertility. In this study, straw application conditions were simulated, and inorganic nitrogen fertilizer labeled with<sup>15</sup>N was added to examine the effects of different nutrient fertilizer additions on the transformation and distribution of exogenous nitrogen in the soil, and also the characteristics of the microbial response. The results showed that application of straw increased the contents of ammonia nitrogen and total nitrogen in the soil and soil solution. When both straw and inorganic nitrogen fertilizer were applied, the<sup>15</sup>N-TN in the soil remained at 28 to 33 &mu;g during the 100-day culture phase. In contrast,<sup>15</sup>N-NH<inf>4</inf><sup>+</sup>increased gradually during the initial 30 days of the culture phase, but subsequently decreased gradually. Application of phosphate increased the contents of<sup>15</sup>N-TN and<sup>15</sup>N-NH<inf>4</inf><sup>+</sup>in the soil, but decreased the content of<sup>15</sup>N in the soil solution by 28%. The distribution of inorganic nitrogen in the soil showed that the proportion of<sup>15</sup>N in the soil remained at 52%-61%. Addition of phosphate fertilizer increased the distribution ratio of<sup>15</sup>N in the soil by up to 16.5%, whereas the proportion of<sup>15</sup>N in the soil solution decreased from 36% on the fifth day to 30% on the 100<sup>th</sup>day, thereby the loss amount of<sup>15</sup>N reduced by 1.2-fold. Addition of straw promoted microbial activity and significantly increased the microbial biomass nitrogen (MBN) content of the soil. Addition of inorganic fertilizer further promoted the microbial activity of the soil. After the 100-day culture experiment, the addition of straw, inorganic nitrogen, and phosphate fertilizer increased MBN to between 2.0-fold and 2.2-fold that of the control treatments. Addition of phosphate fertilizer increased the utilization of<sup>15</sup>N by microorganisms, so that the amount of<sup>15</sup>N-MBN was 1.5-fold higher than that of treatments where only straw and nitrogen fertilizer were added. Examination of soil enzyme activity showed that nitrogen fertilizer reduced soil enzyme activity and substrate affinity. When both nitrogen and phosphate fertilizers were added, the enzyme activity was 48.1% higher than that when only straw was added. The findings of this study thus provide a theoretical basis for furthering our understanding on the nitrogen cycle of the paddy soil ecosystem, the improvement of soil fertility, and the reduction of greenhouse gas emissions. &copy; 2017, Science Press. All right reserved.
Number of references:50
Main heading:Nitrogen
Controlled terms:Enzyme activity - Enzymes - Fertilizers - Gas emissions - Greenhouse gases - Mathematical transformations - Microorganisms - Nitrogen fertilizers - Phosphate fertilizers - Soil moisture  - Soils
Uncontrolled terms:<sup>15</sup>N tracing - Control treatments - Inorganic fertilizers - Inorganic nitrogen - Microbe - Microbial activities - Microbial response - Soil enzyme activity
Classification code:451.1  Air Pollution Sources - 461.9  Biology - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 921.3  Mathematical Transformations
Numerical data indexing:Age 2.74e-01yr, Age 8.22e-02yr, Mass 2.80e-08kg to 3.30e-08kg, Percentage 1.65e+01%, Percentage 2.80e+01%, Percentage 3.00e+01%, Percentage 3.60e+01%, Percentage 4.81e+01%, Percentage 5.20e+01% to 6.10e+01%
DOI:10.13227/j.hjkx.201609219

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 152>

Accession number:20172703864530
Title:Fractionation and Contamination Assessment of Metal Elements in the Surface Sediments of Yundang Lagoon in Xiamen
Authors:Yang, Qiu-Li (1, 2); Yu, Rui-Lian (1); Hu, Gong-Ren (1, 2); Lin, Cheng-Qi (1); Han, Lu (1)
Author affiliation:(1) College of Chemical Engineering, Huaqiao University, Xiamen; 361021, China; (2) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China
Corresponding author:Yu, Rui-Lian(ruiliany@hqu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1010-1017
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Total concentrations of 15 metal elements in the surface sediments of Yundang Lagoon in Xiamen were determined using ICP-MS. The fractions were extracted by a modified BCR method. The results indicated that in different areas of Yundang Lagoon, the order of the concentrations of Cd, Cu, Sr, Pb, Zn and U was: outer lagoon&gt;ditch&gt;inner lagoon, the order for Cr, Co, Ni, V, Fe, Li, Rb and Mn was: inner lake&gt;outer lake&gt;ditch. Cu, Zn and Pb were mainly in the reducible phase; Cd was mainly in the acid soluble-extractable and reducible phases; Co, Ni, U, Fe and Mn were mainly in the reducible and residual phases; Li, V, Cr, Rb and Ba were dominated by residual phase. The potential ecological risk of metal elements suggested that V, Cr, Co, Ni, Zn, Cu, Cd and Pb were at a low potential ecological risk level. The results of ratio of secondary phase to primary phase (RSP) assessment indicated that Cu, Cd and Zn showed high pollution level; Pb showed moderate pollution level; Co, Mn, Sr and U were in a low polluted condition; Ni, Fe, Cr, V, Li, Ba and Rb showed no pollution. In general, Yundang Lagoon was in a low potential ecological risk. &copy; 2017, Science Press. All right reserved.
Number of references:22
Main heading:Copper
Controlled terms:Cadmium - Ecology - Lake pollution - Lakes - Lead - Lithium - Manganese - Metals - Nickel - Pollution  - Rubidium - Sediments - Surficial sediments - Zinc
Uncontrolled terms:Assessment - Contamination assessment - Fractions - Metal elements - Potential ecological risk - Reducible phasis - Surface sediments - Yundang lagoons
Classification code:453  Water Pollution - 454.3  Ecology and Ecosystems - 483  Soil Mechanics and Foundations - 543.2  Manganese and Alloys - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 549.1  Alkali Metals - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
DOI:10.13227/j.hjkx.201607125

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 153>

Accession number:20172703864560
Title:Effects of Lithology on the Abundance and Composition of Soil Nitrogen-fixing Bacteria and Arbuscular Mycorrhizal Fungal Communities in Karst Shrub Ecosystem
Authors:Liang, Yue-Ming (1, 2); Su, Yi-Rong (1); He, Xun-Yang (1); Chen, Xiang-Bi (1)
Author affiliation:(1) Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) Key Laboratory of Karst Dynamics, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China
Corresponding author:Su, Yi-Rong(yrsu@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1253-1261
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Lithology is a key factor when used to restore vegetation in karst degraded ecosystems, and arbuscular mycorrhizal (AM) fungi and nitrogen-fixing bacteria play an important role in improving plant growth. However, little information is available regarding the effects of lithology on these two groups of microorganisms. To test whether these microbial communities are impacted by lithology, the abundance and composition of soil AM fungal and nitrogen-fixing bacteria communities were determined through terminal restriction fragment length polymorphism (T-RFLP) and real-time fluorescence-based quantitative PCR (real-time PCR). Three types of lithology (dolomite, limestone and dolomite-limestone) were selected in this study. The diversity, richness, and evenness of plant species were evaluated through field surveys and soil properties were measured. The results showed that the abundances of soil nitrogen-fixing bacteria and arbuscular mycorrhizal fungal communities were significantly influenced by lithology. The abundances of these two groups of microorganisms were the lowest in dolomite soil, inferior to dolomite-limestone soil, while highest in limestone soil. Similarly, the composition of soil nitrogen-fixing bacteria and AM fungi communities varied among lithology. A significant linear correlation was observed among soil organic carbon, available phosphorus, clay content and nitrogen-fixing bacterial abundance (P&lt;0.05), and a significant linear correlation among total nitrogen, clay content and AM fungal abundance (P&lt;0.05). Redundancy analysis showed that the composition of nitrogen-fixing bacterial community was closely linked to plant evenness, and the AM fungal community composition was closely linked to plant diversity (plant evenness, Shannon-wiener and richness). These results indicated that lithology influenced the abundances and compositions of soil nitrogen-fixing bacteria and arbuscular mycorrhizal (AM) fungal communities mainly through plant and soil properties. &copy; 2017, Science Press. All right reserved.
Number of references:53
Main heading:Bacteria
Controlled terms:Carbon - Ecology - Ecosystems - Forestry - Fungi - Landforms - Limestone - Lithology - Microorganisms - Nitrogen  - Nitrogen fixation - Organic carbon - Polymerase chain reaction - Soil testing - Soils
Uncontrolled terms:Arbuscular mycorrhizal - Arbuscular mycorrhizal fungi - Community structures - Fungal community compositions - Karst - Microbial communities - Nitrogen fixing bacteria - Terminal restriction fragment length polymorphisms
Classification code:454.3  Ecology and Ecosystems - 461.9  Biology - 481.1  Geology - 483.1  Soils and Soil Mechanics - 801.2  Biochemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201606215

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 154>

Accession number:20172703864521
Title:Magnetic Characteristics and Environmental Pollution Analysis of Street Dust in Different Functional Zones of Xi'an City
Authors:Fang, Ni (1); Zhang, Jun-Hui (1); Wang, Jin (1); Jiang, Shan (1); Xia, Dun-Sheng (2)
Author affiliation:(1) Shaanxi Key Laboratory of Disasters Monitoring &amp; Mechanism simulation, Baoji University of Arts and Sciences, Baoji; 721016, China; (2) Key Laboratory of Western China's Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou; 730000, China
Corresponding author:Zhang, Jun-Hui(bwlzjh@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:924-935
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Urban environmental pollution can be revealed by the magnetic characteristics of street dust. Environmental magnetic measurements were carried out for the 151 samples of street dust collected in different functional zones of Xi'an city. Magnetic susceptibility varied within the range between 169.5&times;10<sup>-8</sup>m<sup>3</sup>&middot;kg<sup>-1</sup>and 977.48&times;10<sup>-8</sup>m<sup>3</sup>&middot;kg<sup>-1</sup>, and the &chi;<inf>lf</inf>average value was 415.66&times;10<sup>-8</sup>m<sup>3</sup>&middot;kg<sup>-1</sup>, which was 10 times higher than that of the background value. Isothermal remanent magnetization varied within the range between 2005.31&times;10<sup>-5</sup>A&middot;m<sup>2</sup>&middot;kg<sup>-1</sup>and 10897.64&times;10<sup>-5</sup>A&middot;m<sup>2</sup>&middot;kg<sup>-1</sup>, and the SIRM average value was 5105.99&times;10<sup>-5</sup>A&middot;m<sup>2</sup>&middot;kg<sup>-1</sup>. The average value of frequency-dependent magnetic susceptibility was 1.30, which was extremely low. The SIRM curve was consistent with &chi;<inf>lf</inf>curve. The results indicated a high concentration of magnetic minerals in street dust. The magnetic minerals were mainly low-coercivity ferrimagnetic (magnetite and maghemite) and anti-ferromagnetic minerals (hematite), which contributed to the magnetic susceptibility. The main domains of magnetic minerals were composed of multiple domain (MD) and pseudo-single domain (PSD) ferrimagnetic minerals demonstrating the pollution of environment. According to the spatial distribution of magnetic properties of street dust and the different functional zones of Xi'an city, seven districts (A, B, C, D, E, F and G areas) were divided, which were summarized as three pollution types: heavily polluted, moderately polluted and lightly polluted. In the ecological district of Baqiao (F area) which was heavily polluted, &chi;<inf>lf</inf>, SIRM and soft values were all the highest in the seven areas, and the main pollution sources were industry and vehicle emission. &chi;<inf>lf</inf>, SIRM and soft values were slightly higher in the high-tech industrial district (A area) and the central business and commerce district (B area), which was moderately polluted by industry and vehicle emission. However, the magnetic parameters were relatively low in the functional zones of education, tourism and culture (C, D, E and G area), demonstrating that these areas were only slightly polluted by vehicle emission. &copy; 2017, Science Press. All right reserved.
Number of references:45
Main heading:Magnetic levitation vehicles
Controlled terms:Air pollution - Dust - Ferrimagnetism - Industrial emissions - Magnetic domains - Magnetic properties - Magnetic susceptibility - Magnetism - Minerals - Pollution  - Vehicles
Uncontrolled terms:Environmental pollutions - Ferrimagnetic minerals - Functional zones - Isothermal remanent magnetization - Magnetic characteristic - Pseudo single domains - Street dust - Xi'an cities
Classification code:451  Air Pollution - 451.1  Air Pollution Sources - 482.2  Minerals - 701.2  Magnetism: Basic Concepts and Phenomena
DOI:10.13227/j.hjkx.201604074

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 155>

Accession number:20172703864544
Title:A New Model for the Treatment of Low Ammonia Nitrogen Wastewater by CANON Process
Authors:Wanyan, De-Qing (1, 2); Yuan, Yi (1, 2); Li, Xiang (1, 2); Bi, Zhen (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:Yuan, Yi(yiyuansuzhou@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1122-1129
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Automatic aeration and recirculation of effluent were used to start CANON process with up flow sludge bed reactor, and the start-up and operation characteristics of the process were studied. The results showed that the CANON process could be started quickly and stably by the method of reoxygenation reflux under the conditions of sludge volume fraction 25%, NH<inf>4</inf><sup>+</sup>-N 157 mg&middot;L<sup>-1</sup>, HRT 2 h. After 50 days of operation, the total nitrogen removal rate increased from 1.31 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>to 1.47 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>; the reoxygenation reflux manner could effectively control the amount of dissolved oxygen in the reactor, resulting in DO&lt;0.01 mg&middot;L<sup>-1</sup>, which had a good inhibitory effect on the NOB in the system, and meanwhile provided a good growth environment for AnAOB; By controlling the reflux flow, the production rate of NO<inf>2</inf><sup>-</sup>could be precisely controlled, reaching a good balance with NO<inf>2</inf><sup>-</sup>consumption rates, and thus avoiding the accumulation of NO<inf>2</inf><sup>-</sup>and occurrence of nitration reactions. Therefore, reoxygenation reflux CANON process showed a great advantage in the operation stability, which provided a new model for the start-up and stable operation of CANON process. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Nitration
Controlled terms:Dissolved oxygen - Effluents - Nitrogen - Nitrogen compounds - Nitrogen oxides - Nitrogen removal - Wastewater treatment
Uncontrolled terms:Ammonia nitrogen wastewaters - ANAMMOX - Autotrophic nitrogen removal - Operation characteristic - Operation stability - Reoxygenation - Sludge volume fractions - Total nitrogen removal
Classification code:452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 1.37e-01yr, Mass_Density 1.57e-01kg/m3, Percentage 2.50e+01%, Time 7.20e+03s
DOI:10.13227/j.hjkx.201609203

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 156>

Accession number:20172603849676
Title:Effects of Acidic Materials on the N Transformations During the Composting of Pig Manure and Wheat Straw
Authors:Jiang, Ji-Shao (1); Yao, Qian (1)
Author affiliation:(1) Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1272-1277
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Understanding the effects of acidic materials on the N transformations becomes of critical importance to choose the additives with preserving nitrogen during the manure composting. A 40 d static composting experiment was conducted in the laboratory to explore the effects of acidic materials on changes of temperature, pH, EC (electrical conductivity), GI (germination index), N compounds and TOC (total organic carbon) during the composting of pig manure and wheat straw. Three acidic materials were selected as the additives, including phosphate fertilizer (P), rotten apples (A) and vinegar (V). The results showed that the duration with temperature higher than 50&#8451; in four treatments all exceeded ten days and reached the health standard of high temperature composting. The addition of phosphate fertilizer delayed the time of the pile entering into the high temperature stage, decreased the pH, and increased the EC during the whole composting. On a mass basis, 53.1%, 36.2%, 46.5% and 41.5% of original amount of N in CK, P, A and V were lost during the first 16 d, but there was still 20% N loss during 16-24 d in P and V treatments. The NH<inf>3</inf>-N loss accounted for 26.0%, 11.8%, 21.5% and 20.2% of the N loss. The addition of acidic materials effectively reduced the N loss and the emissions of NH<inf>3</inf>, and the phosphate fertilizer showed the best effect. In the end of composting, the GI all exceeded 80%, and met maturity requirements. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Fertilizers
Controlled terms:Acetic acid - Carbon - Composting - Fruits - Manures - Organic carbon - Phosphate fertilizers - Piles - Straw
Uncontrolled terms:Electrical conductivity - Germination index - High temperature - Manure composting - N transformation - Rotten apples - Total Organic Carbon - Vinegar
Classification code:408.2  Structural Members and Shapes - 804  Chemical Products Generally - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 1.18e+01%, Percentage 2.02e+01%, Percentage 2.15e+01%, Percentage 2.60e+01%, Percentage 3.62e+01%, Percentage 4.15e+01%, Percentage 4.65e+01%, Percentage 5.31e+01%, Percentage 8.00e+01%
DOI:10.13227/j.hjkx.201609161

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 157>

Accession number:20172703864545
Title:Effects of Side-stream Phosphorus Recovery on the Performance of EBPR System Under Low Dissolved Oxygen Condition
Authors:Ma, Juan (1); Song, Lu (1); Yu, Xiao-Jun (1); Sun, Lei-Jun (1); Sun, Hong-Wei (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1130-1136
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A sequencing batch reactor (SBR) was operated with alternating anaerobic/oxic (An/O) condition to investigate the nitrogen and phosphorus removal performance of EBPR with DO=1 mg&middot;L<sup>-1</sup>and the phosphorus recovery effect at extracting side stream ratio of 0, 1/4, 1/3, 1/2 anaerobic phosphorus supernatant. The removal efficiency of NH<inf>4</inf><sup>+</sup>-N was found to be relatively stable during all experimental stages but effluent COD of the system during later period remained as high as 81.3 mg&middot;L<sup>-1</sup>. In the absence of side stream, the average phosphorus removal efficiency was 89.4% and increased to 98.5% and 99.0% when the side stream ratio was 1/4 and 1/3, respectively. However, the phosphorus removal performance began to fluctuate with side stream ratio of 1/2 and the lowest phosphorus removal rate was 65.4%. During each experimental stage, only one day effluent TP failed to meet the national wastewater discharge standard A with side stream ratio of 1/3 in the initial period. Besides, 93.3% of effluent TP which could meet the national standard with side stream ratio of 1/3 was far better than 45.5% of that with side stream ratio of 1/2. Nevertheless, the phosphorus recovery rate improved with the increase of side stream ratio. It was also observed that the TN removal rate dramatically decreased to 50.9% when the side stream ratio increased to 1/2. Consequently, a side stream ratio of 1/3 was found to be the optimal condition in the whole experimental stage, and EBPR system under low dissolved oxygen condition combined with phosphorus recovery through extracting side stream could greatly improve the economic and environmental benefits. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Dissolved oxygen
Controlled terms:Batch reactors - Dissolution - Efficiency - Effluents - Nitrogen removal - Oxygen - Phosphorus - Recovery - Water aeration
Uncontrolled terms:Anaerobic - Economic and environmental benefits - Low dissolved oxygen - Nitrogen and phosphorus removal - Phosphate recovery - Removal efficiencies - Sequencing batch reactors - Side streams
Classification code:445.1  Water Treatment Techniques - 452.3  Industrial Wastes - 802.1  Chemical Plants and Equipment - 802.3  Chemical Operations - 804  Chemical Products Generally - 913.1  Production Engineering
Numerical data indexing:Mass_Density 8.13e-02kg/m3, Percentage 4.55e+01%, Percentage 5.09e+01%, Percentage 6.54e+01%, Percentage 8.94e+01%, Percentage 9.33e+01%, Percentage 9.85e+01%, Percentage 9.90e+01%
DOI:10.13227/j.hjkx.201609183

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 158>

Accession number:20172703864556
Title:Influence of the Application of Non-Hazardous Sewage Sludge on the Evolution of Soil Carbon Pool and Carbon Pool Management Index
Authors:Liu, Xiao (1); Huang, Lin (2); Guo, Kang-Li (1); Zhang, Xue-Ling (3); Yang, Jun-Cheng (1); Jiang, Hui-Min (1); Zhang, Jian-Feng (1)
Author affiliation:(1) National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agriculture Science, Beijing; 100081, China; (2) Sewage Purification Co., Ltd. of Zhengzhou City, Zhengzhou; 450000, China; (3) College of Environment, Sichuan Agricultural University, Chengdu; 611130, China
Corresponding author:Jiang, Hui-Min(jianghuimin@caas.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1218-1226
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The products of non-hazardous commercial sewage sludge were utilized in the accordance of the national standard in the experiment with sandy fluvo-aquic soil under wheat-maize rotation system during 2013 to 2015. The experiment focused on the effects of the use of non-hazardous sewage sludge on soil carbon pool and carbon pool management index to provide theoretical and technical basis for the resource utilization of non-hazardous sewage sludge. The results showed that compared with CK, soil amended sludge significantly improved soil total organic carbon (TOC), soil microbial biomass carbon (SMBC), labile organic carbon (LOC), and dissolved organic carbon (DOC) to 8.40-14.74 g&middot;kg<sup>-1</sup>, 164.45-257.45 mg&middot;kg<sup>-1</sup>, 3.58-4.88 g&middot;kg<sup>-1</sup>and 81.16-101.58 mg&middot;kg<sup>-1</sup>, soil amended sludge significantly enhanced SMBC, LOC and DOC by 84.00%-188.07%, 26.26%-58.03%, and 109.58%-185.39% (P&lt;0.05) respectively, and 45 t&middot;hm<sup>-2</sup>sewage sludge (W3) had the most significant impact on soil carbon pool. The soil microbial entropy (SMBC/TOC), and utilization of labile organic carbon (LOC/TOC) increased by 8.02%-2.77% and 13.75%-46.48% respectively, and the utilization of dissolved organic carbon (DOC/TOC) significantly decreased by 153.45%-195.40% (P&lt;0.05). SMBC/TOC, LOC/TOC, and DOC/TOC declined in treatments of soil amended sludge due to increased application of sewage sludge, which indicated that soil amended with 45 t&middot;hm<sup>-2</sup>of the sewage sludge improved the content of stable carbon resulting in the decease of the ratio. L and LI decreased with the increasing amount of sewage sludge indicating that soil amended with 45 t&middot;hm<sup>-2</sup>of the sewage sludge improved the content of stable carbon and was conducive to the accumulation of organic carbon. Soil amended with sludge significantly increased carbon pool management index (CMPI) by 153.45%-195.40% (P&lt;0.05), and W3 had the most significant effect on CMPI. Compared with TOC, CMPI could be more sensitive and direct to reflect the dynamic changes of soil nutrients and carbon pools through the correlation analysis and redundancy analysis. In summary, the application of 15-45 t&middot;hm<sup>-2</sup>sewage sludge could significantly enhance the soil carbon pool and carbon pool management index, especially 45 t&middot;hm<sup>-2</sup>sewage sludge (W3). &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Organic carbon
Controlled terms:Carbon - Hazards - Lakes - Sewage sludge - Soils - Stream flow
Uncontrolled terms:Carbon pool - Dissolved organic carbon - Fluvo-aquic soils - Resource utilizations - Soil carbon pool - Soil microbial biomass carbons - Total Organic Carbon - Utilization ratio of carbon
Classification code:407.2  Waterways - 452.2  Sewage Treatment - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 1.38e+01% to 4.65e+01%, Percentage 8.02e+00% to 2.77e+00%, Percentage 8.40e+01% to 1.88e+02%
DOI:10.13227/j.hjkx.201607139

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 159>

Accession number:20172703864512
Title:Reactivity-based Anthropogenic VOCs Emission Inventory in China
Authors:Liang, Xiao-Ming (1); Zhang, Jia-Ni (1); Chen, Xiao-Fang (1); Shi, Tian-Li (1); Sun, Xi-Bo (1); Fan, Li-Ya (1, 2, 3); Ye, Dai-Qi (1, 2, 3)
Author affiliation:(1) School of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou; 510006, China; (3) Air Pollution Control of Guangdong University Engineering Technology Research Center (SCUT), Guangzhou; 510006, China
Corresponding author:Ye, Dai-Qi(cedqye@scut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:845-854
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A reactivity-based anthropogenic volatile organic compounds (VOCs) emission inventory in China in 2010 was developed on the basis of ozone formation potential (OFP), using the latest VOCs emission inventory, source profiles and maximum incremental reactivity (MIR) values. The results showed that the total anthropogenic OFP was 84187.61 kt in China in 2010, of which 6 882.53 kt was from alkanes, 41496.92 kt from alkenes/alkynes, 32945.32 kt from aromatic hydrocarbons, 161.45 kt from halocarbons, and 2701.40 kt from oxygenated organics. The top 10 species in terms of OFP consisted of propene, ethene, m/p-xylene, toluene, 1-butene, o-xylene, 1,2,4-trimethyl benzene, 1,3-butadiene, m-ethyl toluene and ethyl benzene, contributing 63.95% to the total OFP but only 31.84% to the mass-based emission. Industrial sources accounted for the largest (49.29%) of the total OFP, followed by transportation sources (28.31%) and agricultural sources (22.40%). The key industrial sources with high reactivity were architectural decoration industry, oil refinery industry, storage and transport, machinery equipment industry, transport equipment industry and printing. Passenger cars, motorcycles and heavy duty vehicles were the major OFP sources of transportation. The two biomass burning sources were both the key OFP sources of agriculture. Shandong, Jiangsu, Guangdong, Zhejiang and Henan were the top five provinces with contributions of 39.65% of the total OFP in China. The reactivity-based emission inventory in this study would be of great significance for the formulation of reactivity-based ozone (O<inf>3</inf>) control strategies in China. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Ozone
Controlled terms:Agriculture - Architectural design - Architecture - Aromatic hydrocarbons - Benzene - Butenes - Ethylene - Machinery - Organic compounds - Toluene  - Volatile organic compounds - Xylene
Uncontrolled terms:Agricultural sources - Anthropogenic sources - China - Emission inventories - Heavy duty vehicles - Machinery equipments - Maximum incremental reactivities - Ozone formation potentials
Classification code:402  Buildings and Towers - 804  Chemical Products Generally - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 2.24e+01%, Percentage 2.83e+01%, Percentage 3.96e+01%, Percentage 4.93e+01%
DOI:10.13227/j.hjkx.201609162

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 160>

Accession number:20171003416430
Title:Bioaccumulation of halogenated flame retardants in fish of dongjiang river
Authors:He, Ming-Jing (1, 2); Yang, Ting (1); Li, Qi (1); Wang, Deng-Xiang (1); Zhao, Jia-Yuan (1)
Author affiliation:(1) College of Resources and Environment Science, Southwest University, Chongqing; 400716, China; (2) Key Laboratory of Agricultural Resources and Environment, Chongqing; 400716, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:382-388
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Bioaccumulation factor (BAF)plays a key role in identification of bioaccumulative substance and in assessment of chemical risks. In order to reveal the bioaccumulation behavior of fish in Dongjiang River, sediment, water and fish samples were collected from Dongjiang River and PBDEs, DBDPE, DP, TBBPA and HBCDs were measured. The ranges of lgBAF were 5.0-7.4, 6.1-7.1, 4.6-7.9, 2.6-4.6 and 4.8-7.7, respectively. In the present study, most HFRs had a lgBAF of higher than 3.7, which suggested that they might be bioaccumulative. The BAF values of HFRs increased with increasing lgK<inf>ow</inf>, when lgK<inf>ow</inf>&gt;7, the bioaccumulation extent decreased with the increase of lgK<inf>ow</inf>. Biotransformation of &gamma;-HBCD toward &alpha;-HBCD and the metabolism of BDE66 and BDE99 of these isomers might attribute to the deviation from the general trend predicted by K<inf>ow</inf>. More attention should be paid to DBDPE, since its BAF value was higher than that of BDE209. The BSAF values of most PBDEs, DBDPE, DP, TBBPA and HBCDs congeners in three fish species were less than 1, indicating that these compounds were unlikely to become a source of pollution to the aquatic organisms due to the poor bioavailability. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Flame retardants
Controlled terms:Aquatic organisms - Barium compounds - Bioaccumulation - Biochemistry - Fish - Halogenation - Isomers - Metabolism - Organic pollutants - Risk assessment  - River pollution - Rivers
Uncontrolled terms:Bioaccumulation factor - Biota-sediment accumulation factors - Chemical risks - Dongjiang rivers - Fish samples - Fish species - General trends - Halogenated flame retardant
Classification code:453  Water Pollution - 461.9  Biology - 471  Marine Science and Oceanography - 801.2  Biochemistry - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
DOI:10.13227/j.hjkx.201607155

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 161>

Accession number:20171003416409
Title:Cathode electric field enhanced removal of nitrobenzene from aqueous solution based on activated carbon fibers (ACF)-Ozone technique
Authors:Zhao, Chun (1, 2, 4); Zhang, Shuai (1); Zhou, Yu (3); Li, Kun (1); Zhou, Wei (1); Li, Peng-Yu (1); Yang, Guang (4); Sun, Zhi-Hua (4); Zheng, Huai-Li (1, 2)
Author affiliation:(1) Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing; 400045, China; (2) National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing; 400045, China; (3) West Branch, China Academy of Urban Planning &amp; Design, Chongqing; 400021, China; (4) College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi; 832003, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:212-219
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Through the environmental factors impact experiments, such as current intensity, initial pH value of the reaction solution, and the type and concentration of the electrolyte, effect and mechanism of electrochemically enhanced removal of nitrobenzene from aqueous solution on activated carbon fibers (ACF)-ozone technique were studied. The result showed that compared with the ACF-O<inf>3</inf>system, the removal efficiency of NB in electrochemically enhanced ACF-O<inf>3</inf>system was significantly improved. The effect of current intensity on the NB removal efficiency in the electrochemically enhanced ACF-O<inf>3</inf>system was not significant. O<inf>3</inf>concentration had some effect on the NB removal efficiency. The pH value of the initial reaction solution had a great influence on the catalytic activity of ACF in ACF-O<inf>3</inf>system. The presence of inorganic salts such as sodium sulfate, sodium nitrate and sodium chloride inhibited the catalytic ability of ACF in O<inf>3</inf>system. In addition, ACF was destroyed by ozone and the promoting effect of ACF was reduced. When the cathode electric field was applied on the surface of ACF, the removal effect of the organic compounds by ACF-O<inf>3</inf>was improved significantly and the structure of ACF was not destroyed by ozone. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Ozone
Controlled terms:Activated carbon - Carbon fibers - Catalyst activity - Cathodes - Efficiency - Electric fields - Electrochemistry - Electrodes - Electrolytes - Nitrobenzene  - pH - Sodium sulfate - Solutions
Uncontrolled terms:Advanced oxidation - Catalytic ability - Current intensity - Environmental factors - Impact experiment - Initial pH value - Reaction solutions - Removal efficiencies
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 801.1  Chemistry, General - 801.4.1  Electrochemistry - 804  Chemical Products Generally - 913.1  Production Engineering
DOI:10.13227/j.hjkx.201607054

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 162>

Accession number:20171003409534
Title:Possible sources of PCDD/Fs in atmosphere of a certain district in Guangdong
Authors:Fu, Jian-Ping (1); Han, Jing-Lei (1); Yu, Xiao-Wei (1); Yang, Yan-Yan (1); Yin, Wen-Hua (1); Feng, Gui-Xian (1); Zhang, Su-Kun (1); Huang, Jin-Qiong (1); Ren, Ming-Zhong (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:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:502-509
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This paper analyzed 17 polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs) by HRGC/HRMS in the flue gas of a certain municipal solid waste incinerator(MSWI) and its surrounding air and other possible sources in Guangdong. It discussed the feature of homologs and main toxic monomers in all samples. It also investigated the relationship among surrounding area, MSWI and possible sources using principle component analysis (PCA) and cluster analysis. The results showed that the concentration of PCDD/Fs was higher in the flue gas than the ambient air, moreover non-effect suffered by prevailing wind direction. The possible sources might be tyre factory and open burning based on spot survey. The concentration of PCDD/Fs was lower in tyre factory than upwind station, but higher at open burning spot than outdrop monitoring station. The analysis of homologs showed that OCDD, 1, 2, 3, 4, 6, 7, 8-HpCDD and 1, 2, 3, 4, 6, 7, 8-HpCDF were the main materials in the flue gas and air, meanwhile OCDF was also found in atmosphere. There was similar feature of 17 PCDD/Fs between surrounding monitoring station and tyre factory, and the same between flue gas and open burning. The further analysis showed that the linearly dependent coefficients of 1, 2, 3, 7, 8-PeCDD and 2, 3, 4, 6, 7, 8-HxCDF were 0.95 and 0.75, respectively. It showed the strong correlation of two monomers in all ambient air samples. The PCA and cluster analysis showed that MSWI influenced the surrounding air, tyre factory had an impact on upwind station, and open burning had a lower effect on outdrop monitoring station. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Waste incineration
Controlled terms:Cluster analysis - Flue gases - Flues - Gases - Incineration - Monomers - Municipal solid waste - Organic pollutants - Principal component analysis - Solid wastes  - Tires
Uncontrolled terms:Ambient air - Monitoring stations - Municipal solid waste incinerator - Open burning - Polychlorinated dibenzo-p-dioxins and dibenzofurans - Prevailing wind directions - Principle component analysis - Strong correlation
Classification code:451.1  Air Pollution Sources - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 452.4  Industrial Wastes Treatment and Disposal - 723  Computer Software, Data Handling and Applications - 804  Chemical Products Generally - 804.1  Organic Compounds - 818.5  Rubber Products - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201606178

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 163>

Accession number:20171003416393
Title:Sedimentary characteristics and sources of organic matter in sediments of Dianchi Lake
Authors:Han, Xiu-Xiu (1, 2, 3); Huang, Xiao-Hu (3); Yu, Li-Yan (3); Yang, Hao (3); Huang, Chang-Chun (1, 2, 3); Huang, Tao (1, 2, 3); Yu, Yan-Hong (4); Luo, Yu (4)
Author affiliation:(1) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing; 210023, China; (2) Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing; 210023, China; (3) College of Geography Science, Nanjing Normal University, Nanjing; 210023, China; (4) Yunnan Institute of Environmental Science, Kunming China International Research Center for Plateau Lake, Kunming; 650000, China
Corresponding author:Huang, Chang-Chun(huangchangchun@njnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:78-86
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sediment columns in the southeast and east of Dianchi Lake were taken as the object of the study to determine ages by<sup>210</sup>Pb dating method. The contents and sediment fluxes of total organic carbon (TOC) and n-alkanes of the sediments were investigated, and organic sources were tracked according to the relevant indexes of n-alkanes. The results indicated that TOC contents and sediment fluxes of two sampling sediments both presented an increasing trend on the whole; Sediment fluxes of n-alkanes varied as three stages: increasing period, decreasing period and re-increasing period. When the sediment fluxes of n-alkanes and TOC both went up, it showed that they had the same sources: sediments in the lake and carried by the rivers; From 1980s to the end of 20<sup>th</sup>century, sediment fluxes of n-alkanes were going down while those of TOC were going up. This result means there was a big difference in the sources of n-alkanes and TOC. The bacteria and algae in the lake made a great contribution to n-alkanes while TOC was mainly influenced by sediments in the lake and carried by the rivers. n-alkanes of the two sampling sites both ranged from C<inf>12</inf>to C<inf>35</inf>. Based on the basic features and relevant indexes of n-alkanes, we proposed that emergent plants made big contributions to the sources of organic matter in the sediments of Dianchi Lake, simultaneously, bacteria and algae had significant contributions to the sources of organic matter in shallow depth of Dianchi Lake. &copy; 2017, Science Press. All right reserved.
Number of references:42
Main heading:Paraffins
Controlled terms:Algae - Bacteria - Biogeochemistry - Biological materials - Carbon - Lakes - Organic carbon - Organic compounds - Sediments
Uncontrolled terms:Emergent plants - n-Alkanes - Organic sources - Sediment column - Sediment flux - Sedimentary characteristics - Source apportion - Total Organic Carbon
Classification code:461.2  Biological Materials and Tissue Engineering - 481.2  Geochemistry - 483  Soil Mechanics and Foundations - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201606051

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 164>

Accession number:20171003416418
Title:Identification of efficient strain applied to mining rehabilitation and its rock corrosion mechanism: based on boosted regression tree analysis
Authors:Wu, Yan-Wen (1); Zhang, Jin-Chi (1); Guo, Xiao-Ping (1); Liu, Xin (1)
Author affiliation:(1) Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing; 210037, China
Corresponding author:Zhang, Jin-Chi(zhangjc8811@sohu.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:283-293
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The soil and water loss problem in rock mining areas is an extremely serious problem, and microbes play significant roles in ecological restoration of those areas. In this study, directive screening was used to explore the efficiency of microbe-mediated habitat restoration and the underlying mechanisms. A bacterial strain NLX-4, which was then identified as Pseudomonas protegens according to its 16S rRNA gene sequence, was screened out as an efficient silicate dissolution bacterium with the ability to secrete siderophore and indole-3-acetic acid (IAA). Moreover, pH value, element (K, Al, Si) release, organic acid content, amino acid concentration, polysaccharide content, and rock particle diameter variation in culture medium were analyzed to explore the ability of P. protegens NLX-4 to promote dolomite dissolution under controlled experimental conditions. These results showed that P. protegens NLX-4 could play a positive role in dolomite dissolution by producing tartaric acid (&gt;777 mg&middot;L<sup>-1</sup>) and polysaccharides (&gt;8.21g&middot;L<sup>-1</sup>). Therefore, P. protegens NLX-4 is an efficient microbial resource that can be used in rehabilitation of abandoned mines and has great application potential. &copy; 2017, Science Press. All right reserved.
Number of references:51
Main heading:Weathering
Controlled terms:Abandoned mines - Bacteria - Dissolution - Ecology - Microorganisms - Organic acids - pH - Restoration - RNA - Rocks  - Silicate minerals - Silicates
Uncontrolled terms:Biological weathering - Ecological restoration - Pseudomonas sp - Rock mining - Silicate rocks
Classification code:454.3  Ecology and Ecosystems - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 482.2  Minerals - 502.1  Mine and Quarry Operations - 801.1  Chemistry, General - 802.3  Chemical Operations - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201607075

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 165>

Accession number:20171003409542
Title:Preparation and phosphorus removal mechanism of highly efficient phosphorus adsorbent Mg/Al-LDO
Authors:Wang, Wei-Dong (1); Hao, Rui-Xia (1); Zhang, Xiao-Xian (1); Wan, Jing-Jing (1); Zhong, Li-Yan (1)
Author affiliation:(1) Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, College of Architectural Engineering, Beijing University of Technology, Beijing; 100124, China
Corresponding author:Hao, Rui-Xia(haoruixia@bjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:572-579
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Aiming at the problem of phosphorus removal in water, Mg/Al-layered double hydroxides (Mg/Al-LDHs) were synthesized via optimized constant pH co-precipitation method, and highly efficient phosphorus adsorbent Mg/Al-layered double oxide(Mg/Al-LDO) was obtained when it was calcined at high temperature. Based on the adsorption characteristics of phosphorus removal, the study combined Zeta potential, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) to analyze the changes of isoelectric point, crystal structure and functional group before and after adsorption. In addition, Mg/Al-LDO of phosphorus adsorption mechanism was discussed. The results indicated that using the optimized co-precipitation method in the conditions of Mg/Al=2&#8758;1, calcination temperature 450&#8451;, and calcination time 2 h, the Mg/Al-LDO adsorption capacity of phosphate was the best, and the maximum adsorption capacity could reach 176.94 mg&middot;g<sup>-1</sup>, which was basically consistent with the theoretical adsorption capacity of 191.57 mg&middot;g<sup>-1</sup>, far higher than those of Mg/Al-LDHs and other phosphorus adsorbents. The results showed that the experimental data has the best fitting result with pseudo-second-order kinetics model. The adsorption process was consistent with Langmuir adsorption isotherm model. The results of Zeta potential, XRD and FTIR showed that phosphorus adsorption of Mg/Al-LDO was accomplished co-operatively by electrostatic attraction, anion in layer, ions exchange, and surface co-ordination. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Phosphorus
Controlled terms:Adsorbents - Adsorption - Calcination - Coprecipitation - Crystal structure - Fourier transform infrared spectroscopy - Precipitation (chemical) - X ray diffraction - Zeta potential
Uncontrolled terms:Adsorption characteristic - Adsorption mechanism - Calcination temperature - Coprecipitation method - Electrostatic attractions - Langmuir adsorption isotherms - Pseudo second order kinetics - Synthesis conditions
Classification code:801  Chemistry - 801.3  Colloid Chemistry - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 933.1.1  Crystal Lattice
Numerical data indexing:Time 7.20e+03s
DOI:10.13227/j.hjkx.201606187

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 166>

Accession number:20171003409545
Title:Simulated desorption kinetics of lead by the dominant plant roots released low molecular weight organic acids from the water-level-fluctuating zone in the Three Gorges Reservoir
Authors:He, Yuan-Jie (1); Liu, Jiang (1); Jiang, Tao (1, 2, 3); Huang, Jing-Jing (1); Cheng, Qing (1); Chen, Hong (1, 2)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China; (3) Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Ume&#7843;; SE-90183, Sweden
Corresponding author:Chen, Hong(chenhong@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:600-607
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Vegetations grow vigorously in the water-level-fluctuating zone (WLFZ) of Three Gorges Reservoir (TGR) during the non-flooded period. Low molecular weight organic acids (LMWOAs) excreted from the roots of these plants may active the heavy metals in soil. In order to investigate the desorption kinetics of Pb in the vegetation covered soil of TGR, the LMWOAs released from Cynodon dactylon and Echinochloa crusgalli roots, which are the dominant species in WLFZ, were analyzed both qualitatively and quantitatively. Furthermore, single and mixed species of LMWOAs were also used in the simulation. The results showed that the variety and content of LMWOAs secreted from Cynodon dactylon roots were larger and higher than those of Echinochloa crusgalli. Citric acid, malonic acid, acetic acid and malic acid were the same LMWOAs released from the two types of plants. The contents of acetic acid were the highest among all LMWOAs, which were 0.765 and 0.261 mmol&middot;kg<sup>-1</sup>in Cynodon dactylon and Echinochloa crusgalli roots, respectively.Citric acid, malonic acid and acetic acid were the same LMWOAs detected from their rhizosphere soils. In the citric acid, malonic acid and acetic acid desorption test, the desorption captivities of Pb were inhibited when the concentration of LMWOAs was lower than 1 mmol&middot;L<sup>-1</sup>. The desorption ability displayed a decreasing order of malonic acid&gt;citric acid&gt;acetic acid. However, the three LMWOAs promoted the desorption of Pb in soil when their concentrations were higher than 1 mmol&middot;L<sup>-1</sup>, respectively. The desorption ability displayed a decreasing order of citric acid&gt;malonic acid&gt;acetic acid. During the entire process of desorption, 0-240 min was the fast reaction stage, and the remaining time was the slow reaction stage. The pseudo-second order kinetics equation could fit best for the kinetic process. &copy; 2017, Science Press. All right reserved.
Number of references:39
Main heading:Soil pollution
Controlled terms:Acetic acid - Carboxylic acids - Citric acid - Desorption - Enzyme kinetics - Heavy metals - Kinetics - Lead - Molecular weight - Organic acids  - pH - Reservoirs (water) - Soils - Vegetation - Water levels
Uncontrolled terms:Desorption kinetics - Dominant plants - Echinochloa crusgalli - Heavy metals in soil - Low molecular weight organic acid - Pseudo second order kinetics - Simulated desorption - Three gorges reservoir
Classification code:441.2  Reservoirs - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 546.1  Lead and Alloys - 801.1  Chemistry, General - 802.3  Chemical Operations - 804.1  Organic Compounds - 931  Classical Physics; Quantum Theory; Relativity - 931.3  Atomic and Molecular Physics
Numerical data indexing:Molar_Concentration 1.00e+00mol/m3, Time 0.00e+00s to 1.44e+04s
DOI:10.13227/j.hjkx.201607167

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 167>

Accession number:20171003409546
Title:Experimental research of Hg<sup>2+</sup>removal by TiO<inf>2</inf>/bentonite composite
Authors:Tang, Xing-Ping (1); Zhou, Xiong (1); Zhang, Jin-Yang (2); Zhang, Cheng (1, 3); Wang, Ding-Yong (1, 3)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang; 641112, 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:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:608-615
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The TiO<inf>2</inf>/bentonite composite was synthesized by modifying calcium-based bentonite with Nano-TiO<inf>2</inf>. The products before and after modification were characterized via the approach of X-ray power diffraction(XRD) and scanning electron microscope(SEM).The effect of TiO<inf>2</inf>/bentonite composite on mercury removal from aqueous solutions of HgCl<inf>2</inf>was studied at different dosage, pH, adsorption time and the initial concentration of Hg<sup>2+</sup>was investigated and compared with the bentonite by indoor simulation experiment, as well as the orthogonal experiments to determine the optimal condition of Hg<sup>2+</sup>adsorption. The experimental results showed: after modified by TiO<inf>2</inf>, TiO<inf>2</inf>/bentonite composite particles were apparently smaller, the basal spacing was increased and with a loose and porous structure. The adsorption rates of TiO<inf>2</inf>/bentonite composite on Hg<sup>2+</sup>were increased compared with bentonite. The Hg<sup>2+</sup>adsorption rates were increased with the increasing dosages, pH and adsorption time. The adsorption rates were higher than 98.0% when the dosage was 1.5 g&middot;L<sup>-1</sup>, pH 7.0, and the adsorption time was 120 min. The adsorption rates became smaller with increasing initial concentration of Hg<sup>2+</sup>. False secondary dynamic equation could describe the adsorption of TiO<inf>2</inf>/bentonite composite on Hg<sup>2+</sup>, and the chemical adsorption was dominant. The adsorption isotherm of Hg<sup>2+</sup>conformed to Langmuir equation, indicating that the adsorption of Hg<sup>2+</sup>was typical monolayer adsorption. The optimal experimental condition was: dosage of 2.0 g&middot;L<sup>-1</sup>, pH 8.0, adsorption time of 16 h and the initial Hg<sup>2+</sup>concentration of 45 mg&middot;L<sup>-1</sup>. Under this condition, the adsorption rate was 99.9%, and the equilibrium concentration of Hg<sup>2+</sup>was 0.034 mg&middot;L<sup>-1</sup>. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Adsorption
Controlled terms:Bentonite - Mercury (metal) - Scanning electron microscopy - Solutions - Titanium dioxide
Uncontrolled terms:Adsorption characteristic - Equilibrium concentration - Experimental research - Initial concentration - Modification - Optimal conditions - Optimal experimental conditions - Orthogonal experiment
Classification code:482.2  Minerals - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3  Chemical Operations - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.50e+00kg/m3, Mass_Density 2.00e+00kg/m3, Mass_Density 3.40e-05kg/m3, Mass_Density 4.50e-02kg/m3, Percentage 9.80e+01%, Percentage 9.99e+01%, Time 5.76e+04s, Time 7.20e+03s
DOI:10.13227/j.hjkx.201607164

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 168>

Accession number:20171003409565
Title:Characteristic of abundances and diversity of carbon dioxide fixation microbes in paddy soils
Authors:Liu, Qiong (1, 2); Wei, Xiao-Meng (1); Wu, Xiao-Hong (1, 3); Yuan, Hong-Zhao (1, 4); Wang, Jiu-Rong (1, 4); Li, Yu-Yuan (1); Ge, Ti-Da (1); Wu, Jin-Shui (1)
Author affiliation:(1) Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Faculty of Life Science and Technology, Central-South University of Forestry and Technology, Changsha; 410004, China; (4) The Public Service Technology Center, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China
Corresponding author:Yuan, Hong-Zhao(yuanhongzhao@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:760-768
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To get a better understanding of the microbial autotrophic carbon sequestration potential of paddy fields and its mechanisms, soil incubation experiment was conducted for four representative paddy soils. The molecular biological methods [quantitative PCR (qPCR), clone library and terminal-restriction fragment length polymorphism (T-RFLP) technique] based on cbbL and cbbM genes encoding the key enzymes [ribulose-1, 5-bisphosphate carboxylase/oxygenase (RubisCO)] of Calvin cycle were used to determine the abundance and diversity of autotrophic microbes. The results showed that, after 45 days of incubation, carbon dioxide fixation autotrophic microbial abundances were generally increased compared with those before incubation, and cbbL gene abundances were approximately three magnitudes higher than those of cbbM. Dominant microbial populations varied among the four paddy soils, and most of these OTUs were distantly related to known sequences, only part of them could be grouped into Proteobacteria and Actinobacteria. RDA analysis results showed that soil organic carbon (SOC), cation exchange capacity (CEC), pH, clay, silk and sand content had significant effects on the CO<inf>2</inf>fixation microbial community. Consequently, the results of this study provide significant reference to understand the role of microorganisms in carbon cycle process. The results are helpful for providing a scientific basis for scientific management of paddy soil fertility and low carbon agriculture construction. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Organic carbon
Controlled terms:Bacteria - Carbon dioxide - Genes - Microorganisms - Plants (botany) - Polymerase chain reaction - Soils
Uncontrolled terms:Carbon dioxide fixation - CbbL - CbbM - Community structures - Paddy soils
Classification code:461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 483.1  Soils and Soil Mechanics - 801.2  Biochemistry - 804.1  Organic Compounds - 804.2  Inorganic Compounds
Numerical data indexing:Age 1.23e-01yr
DOI:10.13227/j.hjkx.201607143

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 169>

Accession number:20171003416397
Title:Response characteristics of algal chlorophyll-a to nitrogen, phosphorus and water temperature in lake erhai based on quantile regression
Authors:Chen, Xiao-Hua (1); Li, Xiao-Ping (2); Qian, Xiao-Yong (1); Hu, Shuang-Qing (1)
Author affiliation:(1) Shanghai Academy of Environmental Science, Shanghai; 200233, China; (2) 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:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:113-120
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on water quality monitoring data of Lake Erhai from 1990 to 2013, the yearly and seasonally response characteristics of algal chlorophyll-a to total nitrogen (TN), total phosphorus (TP) and water temperature was investigated using quantile regression method. It indicated that water temperature was always the primary limiting factor of algal biomass indicated by chlorophyll a (Chl-a) across recent 24 years, but its limiting effect on algal Chl-a content was kept descending sharply and replaced much by nutrients (e.g. P, N) with the increasing eutrophic level. Especially the slope values of TP on Chl-a were kept ascending from -0.3 to 0.8. Since 2002, the positive effect of TN on Chl-a presented slow descending tendency, and P became the most important limiting nutrient factor of algal growth. According to the seasonal variation analysis, water temperature and N had dominant effects on algal Chl-a in spring and autumn, but they were replaced by P in the case of Chl-a&gt;8 mg&middot;m<sup>-3</sup>in spring. In summer, N and P had strong interactive impacts on the algal growth, and the positive effect of P was stronger than that of N in the case of Chl-a&gt;3 mg&middot;m<sup>-3</sup>. In winter, algal biomass was co-limited by temperature and P. It suggested that P reduction is the prior choice of eutrophication control of Lake Erhai, and simultaneously reducing N load is necessary in the background of global warming. In addition,so far a emergency controlling measure should be taken to monitor algal blooming due to sharp ascending of water temperature within a few days in spring and autumn. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Temperature
Controlled terms:Chlorophyll - Ecology - Eutrophication - Global warming - Lakes - Nitrogen - Nutrients - Phosphorus - Regression analysis - Water quality
Uncontrolled terms:Chlorophyll a - Eutrophication control - Limiting effects - Quantile regression - Response characteristic - Seasonal variation - Water quality monitoring - Water temperatures
Classification code:443.1  Atmospheric Properties - 445.2  Water Analysis - 454.3  Ecology and Ecosystems - 641.1  Thermodynamics - 804  Chemical Products Generally - 804.1  Organic Compounds - 922.2  Mathematical Statistics
Numerical data indexing:Age 2.40e+01yr
DOI:10.13227/j.hjkx.201607041

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 170>

Accession number:20171003409551
Title:Nitrogen removal effect and conversion characteristics of nitrous oxide in single-stage and multi-stage A/O processes
Authors:Guo, Chang-Zi (1); Zhang, Feng-Yan (1); Liu, Fu-Yu (1); Zhu, Chao (1); Pei, Li-Ying (1)
Author affiliation:(1) School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an; 710021, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:647-653
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The single-stage A/O and multi-stage A/O processes were simulated by sequencing batch reactors (SBRs) with alternate stirring and aeration. The removal efficiency of nitrogen and the release mechanism of N<inf>2</inf>O were studied under the identical conditions of influent quality, hydraulic retention time (HRT), sludge retention time(SRT), temperature and anoxic/oxic (A/O) retention time ratio. Experimental results showed that COD or ammonia-nitrogen removal had no significant difference between the single-stage and the multi-stage A/O processes for the influent quality equivalent to municipal wastewater. However, TN removal efficiency of the former was better than the later with 72.1% and 52.2%, respectively. In the conversion of total nitrogen, during the typical cycle in the single-stage A/O and multi-stage A/O processes, the yields of N<inf>2</inf>O were 16.95 mg and 3.95 mg, respectively. The conversion rate, which is the ratio of N<inf>2</inf>O yield and TN removal, was respectively 11.47% and 4.11%. N<inf>2</inf>O production and emission occurred mainly in aerobic (nitrification) phase while there was little N<inf>2</inf>O emission in anoxic (denitrification) phase. Although the dominant species of AOB was both Nitrosomonas in the single-stage A/O and the multi-stage A/O processes under the same operating conditions, it was more conducive to the growth of nitrifying bacteria (AOB, NOB) in the single-stage A/O process with the greater abundance of Nitrosomonas. Meanwhile, the type and abundance of NOB in the single-stage A/O process were significantly more than in the multi-stage A/O process too. Therefore, it is more competitive to deal with the high-strengthening ammonia-nitrogen wastewater in the single-stage A/O process. In the actual operation of wastewater treatment, using appropriate partitions of A/O or oxygen-supplying modes can not only result in better nitrogen removal but also decrease the secondary pollution caused by N<inf>2</inf>O to the atmosphere. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Nitrogen removal
Controlled terms:Activated sludge process - Ammonia - Bacteria - Batch reactors - Efficiency - Nitrification - Nitrogen - Nitrogen oxides - Wastewater treatment
Uncontrolled terms:Ammonia nitrogen wastewaters - Conversion characteristics - Hydraulic retention time - Multi stage - Nitrosomonas - Nitrous oxide - Sequencing batch reactors - Single stage
Classification code:452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 913.1  Production Engineering
Numerical data indexing:Mass 1.69e-05kg, Mass 3.95e-06kg, Percentage 1.15e+01%, Percentage 4.11e+00%, Percentage 5.22e+01%, Percentage 7.21e+01%
DOI:10.13227/j.hjkx.201603152

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 171>

Accession number:20171003409529
Title:Inventory and environmental impact of VOCs emission from anthropogenic source in Chang-Zhu-Tan region
Authors:You, Xiang-Yu (1); Luo, Da-Tong (1); Liu, Zhan (1); Su, Yan-Rong (1)
Author affiliation:(1) Hunan Research Academy of Environmental Protection, Changsha; 410004, China
Corresponding author:Su, Yan-Rong(89426781@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:461-468
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on environmental statistical data and emission factor, an anthropogenic volatile organic compounds (VOCs) emission inventory was established for the Chang-Zhu-Tan region, and a grid with spatial resolution of 3 km&times;3 km was built according to the spatial feature data. Ozone formation potential (OFP) and secondary organic aerosol (SOA) formation potential of anthropogenic sources were also estimated. The results showed that the total anthropogenic VOCs emission was about 113.49 kt in Chang-Zhu-Tan region and the main sources were industrial processes, solvent utilization and vehicles with the VOCs emission of 35.88 kt, 28.72 kt and 22.13 kt, respectively. Paving pitch and architecture wall painting accounted for the majority of the solvent utilization and the building materials industry accounted for 75.34% of VOCs emission from the industrial processes. Liling was the largest contributor compared to the other cities in Chang-Zhu-Tan region, where the VOCs emission from these anthropogenic sources in 2014 was 16.58 kt. The total OFP of these sources was 375.33 kt, in which solvent utilization contributed 27.28% and the O<inf>3</inf>generative capacity of biomass burning was the largest. Solvent utilization contributed 35.35% to the total SOA formation potentials and its SOA generative capacity was also the largest. The spatial distribution characteristics revealed that the VOCs emission mostly originated from urban area. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Industrial emissions
Controlled terms:Aerosols - Construction industry - Environmental impact - Organic compounds - Ozone - Solvents - Volatile organic compounds
Uncontrolled terms:Anthropogenic sources - Building materials industry - Chang-Zhu-Tan region - Distribution characteristics - Emission inventories - Formation potential - Ozone formation potentials - Secondary organic aerosols
Classification code:405  Construction Equipment and Methods; Surveying - 451.1  Air Pollution Sources - 454.2  Environmental Impact and Protection - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Percentage 2.73e+01%, Percentage 7.53e+01%
DOI:10.13227/j.hjkx.201607185

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 172>

Accession number:20172603860785
Title:Performance Improvement of Microbial Fuel Cell with Polyaniline Dopped Graphene Anode
Authors:Huang, Li-Hua (1, 2); Li, Xiu-Fen (1); Ren, Yue-Ping (1); Wang, Xin-Hua (1)
Author affiliation:(1) Laboratory of Environmental Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi; 214122, China; (2) School of Life Science, Linyi University, Linyi; 276005, China
Corresponding author:Li, Xiu-Fen(xfli@jiangnan.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1717-1725
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Microbial fuel cell (MFC) technology has potential in recovering bioelectricity from different types of waste, which attracts more and more attention in the field of environment and energy. However, low power density, high cost and low substrate degradation rate, closely associated with anode performance, limit its practical application. In this study, proportional polyaniline (PANI) together with graphene was chosen to obtain the PANI dopped graphene composite. The as-received composite was modified onto the surface of glassy carbon electrode. The results of electrochemical analysis showed that the optimal mass ratio of graphene was 20% for cyclic voltammetry (CV) and linear sweep voltammetry (LSV) analysis. The anodes with 5% graphene produced a peak power density of (831&plusmn;45) mW&middot;m<sup>-2</sup>, which was 1.2, 1.3, 1.3, 1.5, 1.8 times of those with 20% graphene, 1% graphene, graphene, PANI and carbon cloth, respectively. Moreover, 5% graphene reactors showed the maximum values in output voltage, open-circuit voltage (OCV), chemical oxygen demand (COD) removal rate, coulombic efficiency (CE), and biomass density. The polarization resistance was only (24&plusmn;2) &Omega; in 5% graphene reactors, which was 19.8% of that of carbon cloth. The results of electrochemical analysis were not consistent with those of bioelectrochemical analysis, demonstrating that the biocompatibility of electrode was one of the important factors affecting MFC performance. 5% graphene anode showed full advantages of graphene and PANI, which improved the performance of MFC. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Microbial fuel cells
Controlled terms:Anodes - Biocompatibility - Chemical analysis - Chemical oxygen demand - Cyclic voltammetry - Degradation - Electrochemical electrodes - Electrochemistry - Electrodes - Electrophysiology  - Fuel cells - Glass membrane electrodes - Graphene - Open circuit voltage - Polyaniline
Uncontrolled terms:Anode modification - Chemical oxygen demand removals - Electrogenesis - Environment and energies - Glassy carbon electrodes - Linear sweep voltammetry - Polarization resistances - Polyanilines (PAni)
Classification code:461.1  Biomedical Engineering - 461.9.1  Immunology - 702.2  Fuel Cells - 704.1  Electric Components - 708.2  Conducting Materials - 714.1  Electron Tubes - 761  Nanotechnology - 801.4.1  Electrochemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.00e+00%, Percentage 1.98e+01%, Percentage 2.00e+01%, Percentage 5.00e+00%
DOI:10.13227/j.hjkx.201609062

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 173>

Accession number:20172603860982
Title:Modification of Diatomite by Zirconium and Its Performance in Phosphate Removal from Water
Authors:Fan, Yi (1); Wang, Zhe (1); Zhao, Lian-Qin (1); Wu, De-Yi (1)
Author affiliation:(1) School of Environmental Science &amp; Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China
Corresponding author:Wu, De-Yi(dywu@sjtu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1490-1496
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Zirconium modified diatomite was obtained by modifying raw diatomite with zirconium and the mass fraction of zirconia was 12.39% in the obtained material, which was proved to be amorphous via XRD. SEM images showed that porous floccules covered the surface of diatomite after modification and the specific surface area of the zirconium modified diatomite was 75.22 m<sup>2</sup>&middot;g<sup>-1</sup>, larger than that of raw diatomite (14.00 m<sup>2</sup>&middot;g<sup>-1</sup>). XPS spectra indicated that zirconia and diatomite were bonded together through chemical linkage, rather than physical deposition. The adsorption isotherm of phosphate by zirconium modified diatomite was fitted better to the Langmuir model with a calculated maximum adsorption capacity reaching 10.56 mg&middot;g<sup>-1</sup>. The adsorption amount of zirconium oxide component in the material was estimated to be 81.67 mg&middot;g<sup>-1</sup>ZrO<inf>2</inf>, which was higher than that of pure zirconium oxides reported in previous studies. The adsorption amount of phosphate by zirconium modified diatomite decreased with the increase of pH. The adsorption was proved to be a ligand exchange process, supported by the XPS spectra of Zr3d region before and after adsorption. Chloride ion, sulfate ion and nitrate ion did not inhibit the adsorption of phosphate on the material, whereas coexistence of bicarbonate ions competed with phosphate ions to a certain extent. When treating eutrophic lake water with a phosphate concentration of 2 mg&middot;L<sup>-1</sup>, the phosphate concentration level could meet the &#8546; rank of Surface Water Environment Quality Standard of China by adopting the dosage of zirconium modified diatomite &ge; 1.25 g&middot;L<sup>-1</sup>. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Adsorption
Controlled terms:Ions - Oxides - Phosphates - Water treatment - X ray photoelectron spectroscopy - Zirconia - Zirconium
Uncontrolled terms:Adsorption amounts - Adsorption capacities - Chemical linkage - Diatomite - Ligand exchanges - Phosphate concentration - Phosphate removal - Water environments
Classification code:445.1  Water Treatment Techniques - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.25e+00kg/m3, Mass_Density 2.00e-03kg/m3, Percentage 1.24e+01%, Specific_Surface_Area 1.40e+04m2/kg, Specific_Surface_Area 7.52e+04m2/kg
DOI:10.13227/j.hjkx.201609132

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 174>

Accession number:20172603860965
Title:Emission Characteristics of Vehicle Exhaust in Artery and Collector Roads in Nanjing Based on Real-time Traffic Data
Authors:Li, Xiao-Yu (1); Wu, Lin (1); Zou, Chao (1); Zhang, Yi (1); Mao, Hong-Jun (1); Jing, Bo-Yu (2)
Author affiliation:(1) College of Environmental Science and Engineering, Nankai University, Tianjin; 300071, China; (2) State Environmental Protection Key Laboratory of Odor Pollution Control, Tianjin; 300191, China
Corresponding author:Mao, Hong-Jun(hongjunm@nankai.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1340-1347
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The vehicle emissions were estimated by the Urban High Temporal-Spatial Resolution Vehicle Emission Inventory Model and Decision Support System (hereinafter referred to as the HTSVE system) with the real-time data including traffic flow, average speed and fleet compositions obtained from Radio Frequency Identification (RFID) and emission factors based on COPERT. The study focused on the characteristics of vehicle emissions by means of non-parametric test and cluster analysis with ArcGIS in artery roads and collector roads in Nanjing, 2014. The result showed that the proportion of passenger cars reached up to 80%, and China 3 and China 4 accounted for over 90% while China 3 contributed most. The daily average emissions in special periods including morning, noon and evening were affected by both road types and weekend effect. The artery and collector roads were classified as 5 clusters. Each type had similar emission rates distribution and was affected by spatial position to support traffic management. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Advanced traffic management systems
Controlled terms:Artificial intelligence - Cluster analysis - Decision support systems - Fleet operations - Radio frequency identification (RFID) - Traffic control - Transportation - Vehicles
Uncontrolled terms:Artery and collector roads - Emission characteristics - Fleet composition - HTSVE system - Non-parametric test - Real-time traffic datum - Spatial resolution - Traffic management
Classification code:406.1  Highway Systems - 716.3  Radio Systems and Equipment - 723  Computer Software, Data Handling and Applications - 723.4  Artificial Intelligence
Numerical data indexing:Percentage 8.00e+01%, Percentage 9.00e+01%
DOI:10.13227/j.hjkx.201608065

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 175>

Accession number:20172703864527
Title:Release Characteristics of Mercury from Submersed Typical Herbaceous Plants in the Water-Level Fluctuation Zone of the Three Gorges Reservoir Area
Authors:Deng, Han (1); Zhang, Xiang (1); Zhang, Cheng (1, 2, 3); Wang, Yong-Min (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:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:987-992
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In suit inundation experiments of three typical herbaceous plants were conducted in field to investigate the mercury release characteristics of plants grown in the water-level fluctuation zone of the Three Gorges Reservoir after flooding by regulating the water level. To realize this objective, this study mainly focused on the dynamic change of total mercury (THg) concentrations in plants after inundation, the release rate and flux of THg from plants and its release load in this region. The results showed that the release process of THg in plants fitted exponential curve, suggesting that mercury release rate was quick in the initial inundation period and then flat afterwards as the decomposing plants. The THg release amounts (followed the order of Alternanthera philoxeroides&gt;Polygonum lapathifolium&gt;Cynodon dactylon) were probably influenced by initial C/N ratio and THg concentrations of plants. The decrement of THg concentrations in per unit mass of plants residue was found to be generally proportional to their initial C/N ratio, while the THg release amounts were generally proportional to the initial THg concentrations of plants. The total release loads of three plants (Alternanthera philoxeroides, Polygonum lapathifolium, Cynodon dactylon) were estimated to be 167.31, 78.13 and 88.33 mg&middot;hm<sup>-2</sup>, respectively, according to their weight distribution and biomass in the water-level fluctuation zone of the Three Gorges Reservoir Area. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Plants (botany)
Controlled terms:Floods - Mercury (metal) - Reservoirs (water) - Water levels
Uncontrolled terms:Alternanthera philoxeroides - Herbaceous plants - Inundation - Release characteristics - Three gorges reservoir - Three gorges reservoir area - Water-level-fluctuation zones - Weight distributions
Classification code:441.2  Reservoirs - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
DOI:10.13227/j.hjkx.201608187

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 176>

Accession number:20172703864517
Title:Analysis of Chemical Composition and Pollution Source of the Fine Particulate Matter by the SPAMS in the Four Seasons in Nanning
Authors:Liu, Hui-Lin (1); Chen, Zhi-Ming (1); Mao, Jing-Ying (1); Liang, Gui-Yun (1); Huang, Jiong-Li (1); Li, Hong-Jiao (1); Yang, Jun-Chao (1); Mo, Zhao-Yu (1, 2)
Author affiliation:(1) Scientific Research Academy of Guangxi Environmental Protection, Nanning; 530022, China; (2) Deparment of Environmental Science and Engineering, Fudan University, Shanghai; 200433, China
Corresponding author:Mo, Zhao-Yu(65678503@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:894-902
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To study the chemical composition and pollution sources of the fine particulate matter during the four seasons in Nanning, single particle aerosol mass spectrometry was performed to characterize the fine particulate matter in Nanning during the four seasons. The correlation (R<sup>2</sup>) between the fine particulate matter number concentration and the mass concentration of the fine particulate matter obtained using SPAMS was all above 0.75 in the observation period. The particle number concentration could reflect the atmospheric pollution situation to some degree. The average mass spectrogram of the fine particulate matter reflected that secondary pollutants were more in winter and spring in Nanning. The Art-2a classification method was used to classify the chemical composition of the fine particulate matter. The results showed that the number concentration of the chemical composition and sources of pollution had differences in the four seasons. Chemical composition could reflect pollution sources. The elevated elemental carbon was positively with increasing coal combustion in winter. The elevated organic carbon was positively correlated with motor vehicle source in autumn. Rich potassium particles, levoglucosan and substance were positively correlated with biomass burning source and dust in summer. The rich sodium particles and heavy metals were higher in spring. During the process of increasing pollution, the contributions of biomass and coal combustion sources were large. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Air pollution
Controlled terms:Aerosols - Chemical analysis - Coal combustion - Heavy metals - Mass spectrometry - Organic carbon - Particles (particulate matter) - Pollution
Uncontrolled terms:Aerosol mass spectrometers - Chemical component - Fine particulate matter - Pollution sources - The four seasons
Classification code:451  Air Pollution - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 531  Metallurgy and Metallography - 801  Chemistry - 804.1  Organic Compounds - 951  Materials Science
DOI:10.13227/j.hjkx.201602009

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 177>

Accession number:20172703864532
Title:Efficiency and Mechanism of Purifying High Iron-Manganese from Ground Water in the Cold Villages and Towns Based on The Coupling of Rice Husk and Iron-Manganese Oxidizing Bacteria
Authors:Sun, Nan (1); Chen, Yan-Li (1); Zhang, Ying (2); Lu, Yan (2); Song, Qiu-Xia (2); Li, Chun-Yan (2); Jiang, Zhao (2)
Author affiliation:(1) College of Water Conservancy &amp; Civil Engineering, Northeast Agricultural University, Harbin; 150030, China; (2) College of Resources and Environment, Northeast Agricultural University, Harbin; 150030, China
Corresponding author:Zhang, Ying(zhangyinghr@hotmail.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1028-1037
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Aiming at the special geo-climatic conditions and typical problems constraining the development of villages and towns, making villages and towns have the following characteristics: green and low-carbon, energy saving and environmental friendly, the coupling process of adsorption by carbonized rice husk particles and biological oxidation using Bacillus megaterium bacteria was developed for purifying high iron-manganese from groundwater in the cold villages and towns. The quick start-up method of biological filter at low temperature was studied. Based on the contact oxidation and biological method, iron removal efficiency and reaction rate in different filtration layers under different filtration conditions were comparatively analyzed, and iron removal mechanism of biological filter was determined. Filter materials and the solid samples in backwash water at different stages were characterized and the manganese removal mechanism of biological filter was analyzed through SEM, FTIR, XPS, Raman spectra and EPR. The results showed that the active biological membrane reached mature and stable only after 15 d with the operation mode of bacteria liquid cycle and low filtration rate in the filter column. The effluent concentration met the requirements of drinking water quality (GB 5749-2006) in the stable operation process. Fe, Mn and bacteria were lower than 0.3 mg&middot;L<sup>-1</sup>, 0.1 mg&middot;L<sup>-1</sup>, 100 CFU&middot;mL<sup>-1</sup>, respectively. Iron removal mechanism relied mainly on the physical and chemical effects, supplemented by biological function. During the biofilm culturing stage and initial stable operation stage of filter column, manganese removal relied mainly on the biological effect. The physical chemistry was preferred at later stable operation stage. The study provides technical support for the applications of treating collectively Fe<sup>2+</sup>and Mn<sup>2+</sup>in groundwater. &copy; 2017, Science Press. All right reserved.
Number of references:21
Main heading:Chemicals removal (water treatment)
Controlled terms:Bacteria - Bacteriology - Biological materials - Biological membranes - Carbon - Cytology - Effluents - Electron spin resonance spectroscopy - Filters (for fluids) - Filtration  - Fourier transform infrared spectroscopy - Groundwater - Iron - Manganese - Mechanisms - Microfiltration - Passive filters - Physical chemistry - Potable water - Rural areas  - Temperature - Water - Water quality
Uncontrolled terms:Bacillus megaterium - Biological oxidations - Carbonized rice husks - Effluent concentrations - Environmental-friendly - Low temperatures - Manganese oxidizing bacteria - Rice husk
Classification code:444  Water Resources - 444.2  Groundwater - 445.2  Water Analysis - 452.3  Industrial Wastes - 461.2  Biological Materials and Tissue Engineering - 543.2  Manganese and Alloys - 545.1  Iron - 601.3  Mechanisms - 641.1  Thermodynamics - 703.2  Electric Filters - 801  Chemistry - 801.4  Physical Chemistry - 802.3  Chemical Operations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 1.00e-04kg/m3, Mass_Density 3.00e-04kg/m3
DOI:10.13227/j.hjkx.201608154

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 178>

Accession number:20172703864561
Title:Characterization of Phosphorus Forms in Organic Composts and Their Effects on Leaf Phosphorus Content of Castanea mollissima in Chinese Chestnut Producing Area
Authors:Song, Ying (1); Guo, Su-Juan (1); Zhang, Li (1); Sun, Hui-Jun (1); Xie, Ming-Ming (1); Wu, Yan-Qi (1); Wang, Jing (1)
Author affiliation:(1) Key Laboratory for Silviculture and Conservation, College of Forestry, Beijing Forestry University, Beijing; 100083, China
Corresponding author:Guo, Su-Juan(gwangzs@263.net)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1262-1271
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Characterization of the forms of phosphorus (P) in four organic composts including compost of hulls and leaves of Castanea mollissima, edible fungi residues, corn stalks and chicken manure (BYZ), compost of edible fungi residues and chicken manure (ZF), composts of hulls and leaves of C. mollissima, edible fungi residues and chicken manure (BZ1 and BZ2) in Chinese chestnut producing area was conducted by sequential P fractionation developed by Dou et al. Field trial was conducted to study the effects of compost application on leaf phosphorus content of Castanea mollissima. The results showed that total phosphorus content (TP) of organic composts ranked as follows: BZ1 (10.61 g&middot;kg<sup>-1</sup>)&gt;ZF (9.03 g&middot;kg<sup>-1</sup>)&gt;BYZ (8.56 g&middot;kg<sup>-1</sup>)&gt;BZ2 (7.68 g&middot;kg<sup>-1</sup>), and the inorganic phosphorus (P<inf>i</inf>) accounted for 62.88%-73.62% of the total phosphorus in the organic composts. The content and proportion of HCl-P in the total fractionated phosphorus (P<inf>rt</inf>) was the highest among P forms in ZF, while that of H<inf>2</inf>O-P was the highest in BYZ, BZ1 and BZ2.The content of NaOH-P was very low in all the composts. Active H<inf>2</inf>O-Por NaHCO<inf>3</inf>-P had the highest inorganic phosphorus proportion (89.17%-96.00%) of all the P forms. The major P<inf>i</inf>forms in BZ2 were H<inf>2</inf>O-and HCl-extractable P fractions, while H<inf>2</inf>O-P<inf>i</inf>, HCl-P<inf>i</inf>and NaHCO<inf>3</inf>-P<inf>i</inf>were major P<inf>i</inf>forms in BYZ, BZ1 and ZF. Residual-P was the predominant organic phosphorus form, and BZ2 showed the highest Residual-P proportion of the total fractionated phosphorus (P<inf>rt</inf>) among all the composts. Leaf phosphorus contents per unit area of Castanea mollissima by field trial on the added phosphorus-equivalent basis were expressed as: BZ2&gt;BZ1&gt;BYZ&gt;ZF&gt;CK. Increment of leaf phosphorus content per unit area in Julyand per month on average showed positive relationship with the content and proportion of H<inf>2</inf>O-P<inf>i</inf>in the total fractionated phosphorus of composts, which presumably played a key role in leaf phosphorus absorption of C. mollissima measured in the year of deep concentrated fertilization. The results suggested that composts of hulls and leaves of C. mollissima, edible fungi residues and chicken manure (BZ2) was a good choice in given area for aerobic composting raw material system in which organic wastes from Chinese chestnut industry accounted for 80% (hulls and leaves of Castanea mollissima and edible fungi residues accounted for 60% and 20% respectively), which had a high proportion of H<inf>2</inf>O-P<inf>i</inf>and organic Residual-P pool and led to the highest leaf phosphorus content of C. mollissima. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Phosphorus
Controlled terms:Animals - Composting - Fertilizers - Fruits - Fungi - Manures
Uncontrolled terms:Castanea mollissima - Compost applications - Edible fungi residues - Inorganic phosphorus - Leaf phosphorus - Organic phosphorus - Phosphorus form - Producing areas
Classification code:804  Chemical Products Generally - 821.4  Agricultural Products - 821.5  Agricultural Wastes
Numerical data indexing:Percentage 2.00e+01%, Percentage 6.00e+01%, Percentage 6.29e+01% to 7.36e+01%, Percentage 8.00e+01%, Percentage 8.92e+01% to 9.60e+01%
DOI:10.13227/j.hjkx.201608088

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 179>

Accession number:20172703864518
Title:Physico-chemical Characteristics of Individual Aerosol Particles in Marine Atmosphere on South Hemisphere
Authors:Chi, Jian-Wei (1); Li, Chuan-Jin (2); Sun, Jun-Ying (3); Zhang, Jian (1); Wang, Hui (1); Wang, Han-Tao (1); Li, Wei-Jun (1)
Author affiliation:(1) Environment Research Institute, Shandong University, Ji'nan; 250100, China; (2) Gold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou; 730000, China; (3) Key Laboratory of Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing; 100081, China
Corresponding author:Li, Wei-Jun(liweijun@sdu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:903-910
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:During the 29th Chinese National Antarctic Research Expedition (CHIANRE), individual particle samples were collected from South China to Antarctic during November 2012 to April 2013. A transmission electron microscopy with energy-dispersive X-ray spectrometry (TEM-EDS) was employed to analyze the morphology, mixing state, composition, and relative abundances of individual aerosol particles. Atmospheric particles were classified into four types: sea salt, mineral, S-rich and C-rich. Sea salt aerosols (SSA) were dominant in the marine particles from South China to Antarctic, and they were further divided into three sub-types: fresh SSA, partially aged SSA, and fully aged SSA. Partially and fully aged SSA accounted for 86% of total SSA number. Interestingly, surface of partially aged SSA and fully aged SSA contained abundant rod-like Na<inf>2</inf>SO<inf>4</inf>. Mineral dust particles increased in the coastal areas which were influenced by continental air. In addition, we found that S-rich particles were abundant at two sampling sites (the middle eastern of Indian Ocean and Antarctic inland). The back trajectories of air masses indicated that these S-rich particles were mainly formed via the oxidation of dimethyl sulfide (DMS) emitted from the marine phytoplanktons. Our study suggests that the SSA aging process in the South Hemisphere atmosphere was controlled by the DMS which is different from the SSA aging under the influence of anthropogenic pollutants in the North Hemisphere. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Aerosols
Controlled terms:Electron microscopy - High resolution transmission electron microscopy - Mixing - Phytoplankton - Transmission electron microscopy
Uncontrolled terms:Antarctic - Anthropogenic pollutants - Energy dispersive X-ray spectrometry - Individual particle analysis - Mineral dust particles - Mixing state - Physicochemical characteristics - Sea salt aerosol
Classification code:471  Marine Science and Oceanography - 741.3  Optical Devices and Systems - 802.3  Chemical Operations
Numerical data indexing:Percentage 8.60e+01%
DOI:10.13227/j.hjkx.201607091

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 180>

Accession number:20172703864541
Title:Recovery Performance of ANAMMOX Process after Inhibition Resulting from Seawater
Authors:Qi, Pan-Qing (1); Yu, De-Shuang (1); Li, Jin (1); Guan, Yong-Jie (1); Wei, Si-Jia (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:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1102-1108
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:An anaerobic sequencing batch reactor (ASBR) was operated to investigate the recovery performance of ANAMMOX reactor after the inhibition of 100% seawater concentration. The results showed that the nitrogen removal performance of ANAMMOX reactor suffered inhibition of high salinity concentration. However, it could enter a period of stable nitrogen removal efficiency again after an interim stable period and a recovery period. The nitrogen removal rate (NRR) could reach 0.52 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>, which was similar to the control group, containing 10% seawater and having a NRR of 0.462 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>. The modified Logistic model and modified Gompertz model were revised and their application field was broadened. The re-modified Logistic model was suggested to be used to simulate the NRR recovery process of ANAMMOX reactor that suffered inhibition of 100% seawater concentration. The doubling time of NRR was calculated to be 11.359 d using the prediction formula established for the recovery time of NRR. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Nitrogen removal
Controlled terms:Batch reactors - Nitrogen - Recovery - Seawater - Sewage - Wastewater treatment
Uncontrolled terms:Anaerobic sequencing batch reactors - ANAMMOX - Modified Logistic model - Modified-Gompertz model - Nitrogen removal efficiency - Nitrogen removal rates - Recovery kinetics - Recovery performance
Classification code:452.1  Sewage - 452.4  Industrial Wastes Treatment and Disposal - 471.4  Seawater, Tides and Waves - 802.1  Chemical Plants and Equipment - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.00e+01%, Percentage 1.00e+02%
DOI:10.13227/j.hjkx.201606169

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 181>

Accession number:20172703864555
Title:Enhanced Electrokinetic Remediation of Heavy Metals Contaminated Soils by Stainless Steel Electrodes as well as the Phenomenon and Mechanism of Electrode Corrosion and Crystallization
Authors:Wen, Dong-Dong (1); Fu, Rong-Bing (2); Zhang, Wei (1); Gu, Ying-Ying (3)
Author affiliation:(1) School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China; (3) College of Chemical Engineering, China University of Petroleum (East China), Qingdao; 266580, China
Corresponding author:Fu, Rong-Bing(rongermmfu@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1209-1217
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Electrode corrosion and salt crystallization are important challenges that restrict the engineering application of electrokinetic technology. In the present study, using stainless steel as an electrode, and deionized water (DW), citric acid (CA) and polyaspartic acid (PASP) as electrolytes, Pb/Cu-contaminated soil was remediated by electrokinetic. All of the EK experiments were conducted in a 2 L soil cell reactor with a moisture level of about 35% blended with 1000 mg&middot;g<sup>-1</sup>of Pb and 778 mg&middot;g<sup>-1</sup>of Cu under a constant voltage gradient (1 V&middot;cm<sup>-1</sup>, 2 V&middot;cm<sup>-1</sup>) for 150 h. The removal efficiency of heavy metals and influencing factors, as well as the phenomenon and mechanism of electrode corrosion and salt crystallization were explored. The experimental results showed under the action of electric field, the Ca in the test soil would move to the cathode, and the crystal was formed in the alkaline condition. Additionally, the conductivity of the electrode was reduced. During the EK process, water at the anode was primarily oxidized, undergoing a reduction reaction at the cathode. Because H<sup>+</sup>and OH<sup>-</sup>were transported through the soil by electromigration and electro-osmotic flow (EOF), changes in soil pH could occur. The concentrations distribution of Pb-Cu appeared to be related to the distribution of soil pH in the cell, which might be associated with the desorption and hydroxide precipitation of Pb-Cu. PASP resulted in obvious inhibitory effect on the corrosion of stainless steel electrode, CA and PASP could clearly destroy the formation of CaCO<inf>3</inf>crystal, while barely effectively disrupted the formation of Ca(OH)<inf>2</inf>crystal. Both CA and PASP could promote the removal of Pb, but the influence of PASP on the removal of Cu was not obvious, and the effect of CA was very significant. Combined with different corrosion inhibitor and reinforcing agent, stainless steel can be chosen as the engineering application electrode in electrokinetic remediation. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Soil pollution
Controlled terms:Alkalinity - Binary alloys - Calcium - Cathodes - Citric acid - Copper - Copper alloys - Corrosion - Corrosion inhibitors - Crystallization  - Deionized water - Electric fields - Electrodes - Electrodynamics - Electroosmosis - Heavy metals - Lead - Lead alloys - Pollution - Remediation  - Salt removal - Soil pollution control - Soils - Stainless steel - Welding rods
Uncontrolled terms:Electrokinetic remediation - Electrokinetic technology - Engineering applications - Heavy metal contaminated soils - Hydroxide precipitation - Phenomenon and mechanisms - Polyaspartic acid - Stainless steel electrode
Classification code:445.1  Water Treatment Techniques - 454.2  Environmental Impact and Protection - 483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 538.2.2  Welding Equipment - 544.1  Copper - 544.2  Copper Alloys - 545.3  Steel - 546.1  Lead and Alloys - 549.2  Alkaline Earth Metals - 701  Electricity and Magnetism - 701.1  Electricity: Basic Concepts and Phenomena - 801.1  Chemistry, General - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds
Numerical data indexing:Electric_Field_Strength 1.00e+02V/m, Electric_Field_Strength 2.00e+02V/m, Percentage 3.50e+01%, Time 5.40e+05s, Volume 2.00e-03m3
DOI:10.13227/j.hjkx.201608195

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 182>

Accession number:20171003409548
Title:Influencing factors of bacterial activity in water distribution networks
Authors:Wang, Xiao-Dan (1, 2); Zhao, Xin-Hua (1)
Author affiliation:(1) School of Environmental Science and Engineering, Tianjin University, Tianjin; 300072, China; (2) CECEP Consulting Co., Ltd., Beijing; 100082, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:622-628
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the variation patterns of bacterial activity in water distributed networks, this paper studied a simulated water distribution network in a northern China city. Microscopic examination and bacterial counts were conducted on acridine orange-stained bacteria using fluorenscence microscopy to ensure precise quantitative analysis. The ratio of viable bacterial count to total bacterial count was used to characterize the overall bacterial activity in the drinking water distribution network, as well as to study the impacts imposed by various factors. As indicated, this method was proved to be rapid, reliable and repeatable in bacterial counts. Populations of viable bacteria and total bacteria in water samples were 10<sup>3</sup>-10<sup>4</sup>cells&middot;mL<sup>-1</sup>and 10<sup>4</sup>-10<sup>5</sup>cells&middot;mL<sup>-1</sup>, respectively. There was a positive correlation between the bacterial activity and water temperature, turbidity, and flow velocity. There was also a negative correlation between bacterial activity and residual chlorine after the operation stabilized. The capacity of different forms of bacteria in the simulated water distribution networks with tolerance of sodium hypochlorite was in the following order: long-rod-shaped, spherical-shaped, short-rod-shaped, and curved-shaped. The reactivation and reproduction capability of rod-shaped bacteria was stronger. There were more short-rod-shaped bacteria in summer water samples than in winter. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Water distribution systems
Controlled terms:Air purification - Bacteria - Citrus fruits - Electric power distribution - Flow velocity - Fluorescence microscopy - Potable water - Water - Water supply systems
Uncontrolled terms:Acridine orange - Bacterial activity - Bacterial count - Distributed networks - Drinking water distribution networks - Positive correlations - Total bacterial count - Water distribution networks
Classification code:444  Water Resources - 446.1  Water Supply Systems - 631  Fluid Flow - 643  Space Heating, Ventilation and Air Conditioning - 706.1.2  Electric Power Distribution - 821.4  Agricultural Products - 931.4  Quantum Theory; Quantum Mechanics
DOI:10.13227/j.hjkx.201604029

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 183>

Accession number:20171003416412
Title:Specificity of intact ladderane lipids in anaerobic ammonium oxidizing bacteria from four reactors
Authors:Wang, Han (1); Fang, Fang (1); Li, Kai (1); Xing, Hui (1); Guo, Jin-Song (1, 2); Chen, You-Peng (2); Zeng, Qian-Song (1)
Author affiliation:(1) College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing; 400045, China; (2) Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China
Corresponding author:Fang, Fang(fang_cqu@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:238-246
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Intact ladderane lipids are a special kind of phospholipids in the anammoxosome membrane of AnAOB. Phospholipid organic mixture was extracted respectively from four sludge samples in anaerobic EGSB reactor,aerobic SBR reactor, autotrophic nitrogen removal SBBR reactor and anaerobic ammonium oxidation EGSB reactor. Phospholipid extracts of sludge were detected by the HPLC-ESI-MS/MS method to determine the types of intact ladderane lipids, and the specificity of intact ladderane lipids was also analyzed, at the same time, the bacterial community structure of autotrophic nitrogen removal SBBR reactor and anaerobic ammonium oxidation EGSB reactor was determined by high-throughput sequencing technology. Analytical results of intact ladderane lipids showed that intact ladderane lipids were not detected from anaerobic EGSB reactor and aerobic SBR reactor, and were detected from autotrophic nitrogen removal SBBR reactor and anaerobic ammonium oxidation EGSB reactor. Five kinds of intact ladderane lipids were detected in the phospholipid extract of sludge from autotrophic nitrogen removal SBBR reactor, and seven kinds of intact ladderane lipids were detected in the phospholipid extract of sludge from anaerobic ammonium oxidation EGSB reactor. The results of high-throughput sequencing confirmed that the autotrophic nitrogen SBBR reactor contained AnAOB of the genera Candidatus Brocadia and Candidatus Jettenia, and the anaerobic ammonium oxidation EGSB reactor contained AnAOB of the genera Candidatus Kuenenia and Candidatus Jettenia. These results illustrated that intact ladderane lipids were the peculiar phospholipids in AnAOB. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Nitrogen removal
Controlled terms:Bacteria - Lipids - Nitrogen - Oxidation - Phospholipids - Throughput - Wastewater treatment
Uncontrolled terms:Ammonium oxidizing bacteria - Anaerobic ammonium oxidation - Analytical results - AnAOB - Autotrophic nitrogen removal - Bacterial community structure - High-throughput sequencing - Reactor
Classification code:452.4  Industrial Wastes Treatment and Disposal - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.1  Organic Compounds
DOI:10.13227/j.hjkx.201607221

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 184>

Accession number:20171003416422
Title:Composition and environmental adaptation of microbial community in shibahe copper tailing in zhongtiao mountain in Shanxi
Authors:Liu, Jin-Xian (1); Li, Cui (2); Jing, Ju-Hui (3); Jia, Tong (1); Liu, Xing-Gang (4); Wang, Xiao-Yun (1); Chai, Bao-Feng (1)
Author affiliation:(1) Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China; (2) Faculty of Environment Economics, Shanxi University of Finance and Economic, Taiyuan; 030006, China; (3) Institute of Biotechnology, Shanxi University, Taiyuan; 030006, China; (4) Department of Environmental Protection and Work Safety, Zhongtiaoshan Non-ferrous Metal Group Co., Ltd., Yuanqu; 043700, China
Corresponding author:Chai, Bao-Feng(bfchai@sxu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:318-326
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to reveal the effects of heavy metal pollution on microbial community compositions and microbial community diversity in tailing area, we conducted an experiment by examining the microbial community in tailing water, sediments and tailing sand in Shibahe copper tailing in Zhongtiao Mountain. Differences in microbial community compositions in different habitats and their relationships with environmental parameters were analyzed. The results showed that the richness and diversity of microbial community were the largest in tailing sand, but the lowest in tailing water. Microbial community compositions were similar between tailing water and sediments. There were significant positive correlations between the relative abundance of the dominant family (Sphingomonadaceae) and contents of heavy metals (Cd, Cu, Mn, Ni, Pb, Zn), while there were significant negative correlations between relative abundances of Caulobacteraceae, Methylobacteriaceae, Nocardioidaceae, Microbacteriaceae, Micrococcaceae, Streptococcaceae and Paenibacillaceae and heavy metal contents. It showed that most of the bacteria were inhibited by heavy metals, but Sphingomonadaceae had a higher tolerance to heavy metals which may indicate that it has a potential for remediation of heavy metal contamination. &copy; 2017, Science Press. All right reserved.
Number of references:44
Main heading:Copper
Controlled terms:Cadmium - Heavy metals - Lead - Manganese - Microorganisms - Sediments - Water pollution
Uncontrolled terms:Environmental adaptation - Environmental parameter - Heavy metal contamination - Heavy metal pollution - Microbial communities - Microbial community composition - Negative correlation - Positive correlations
Classification code:453  Water Pollution - 461.9  Biology - 483  Soil Mechanics and Foundations - 531  Metallurgy and Metallography - 543.2  Manganese and Alloys - 544.1  Copper - 546.1  Lead and Alloys - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
DOI:10.13227/j.hjkx.201606201

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 185>

Accession number:20171003416396
Title:Correlation between ldi-based land use types and water quality in sanshan island of Taihu Lake National Wetland Park, Suzhou
Authors:Yang, Zhao-Hui (1); Su, Qun (1); Chen, Zhi-Hui (1); Bai, Jun-Wu (1); Qian, Xin-Qiang (1); Zhang, Zhi-Min (1)
Author affiliation:(1) School of Environmental Science &amp; Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:104-112
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sanshan island of Taihu Lake National Wetland Park in Suzhou was taken as a case study to explore the relationship between land use types and water quality under different spatial and temporal conditions. Firstly, principal component analysis was used to calculate the comprehensive index of water quality for a given sampling site. Secondly, landscape development intensity index (LDI), which can represent combined effects of land use types, was calculated based on GIS spatial analysis technology. Finally, overall correlation between water quality and land use types was obtained by using Pearson correlation analysis. The results showed that the water quality varied with the spatial distribution of the wetland park. Totally, water quality of west region was good and water quality of east region was poor; Built-up land and water quality integrated index exhibited obvious positive correlation. And natural water and water quality index was significantly negatively correlated; By building relationship of water quality index and LDI index within 100, 150, 200, 250, 300, 350, 400, 450 and 500 m radius buffer, Pearson's r values between them were 0.641, 0.678, 0.691, 0.685, 0.691, 0.695, 0.680, 0.653 and 0.649 respectively (P&lt;0.01). These statistics indicated obvious and stable overall correlation between land use types and water quality. This can reflect a variety of land use types'comprehensive effects on wetland water quality, and partly overcome the weakness of incomplete and difficult explanation for water quality changes with single type of land use. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Quality control
Controlled terms:Correlation methods - Geographic information systems - Lakes - Land use - Landforms - Principal component analysis - Water quality - Wetlands
Uncontrolled terms:Comprehensive indices - Land use type - Landscape development intensities - Pearson correlation analysis - Positive correlations - Principle component analysis - Water quality indexes - Wetland parks
Classification code:403  Urban and Regional Planning and Development - 445.2  Water Analysis - 481.1  Geology - 903.3  Information Retrieval and Use - 913.3  Quality Assurance and Control - 922.2  Mathematical Statistics
Numerical data indexing:Size 4.50e+02m, Size 5.00e+02m
DOI:10.13227/j.hjkx.201606122

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 186>

Accession number:20171003416399
Title:Change and influencing factors of dissolved carbon and dissolved nitrogen in water of the three gorges reservoir
Authors:Fan, Zhi-Wei (1, 2); Hao, Qing-Ju (1, 2); Huang, Zhe (1, 2); Chai, Xue-Si (1, 2); Jiang, Chang-Sheng (1, 2)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400716, China; (2) Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Chongqing; 400716, China
Corresponding author:Jiang, Chang-Sheng(jiangcs@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:129-137
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to understand the changes of dissolved carbon and dissolved nitrogen in the water of Three Gorges Reservoir, this research was carried out once a week by the bank of Yangtze River in Fuling beach from March 2011 to August 2012, and the variation characteristics of dissolved C, N composition and their source were analyzed. The results showed that the concentration of DOC ranged from 0.64 mg&middot;L<sup>-1</sup>to 9.07 mg&middot;L<sup>-1</sup>, and had obvious seasonal change: summer&gt;spring and autumn&gt;winter. Annual total input of DOC was 1.78 &times; 10<sup>9</sup>kg, the seasonal change trend of the total input of DOC was similar to that of the concentration of DOC; The concentration of DTN ranged from 2.59 mg&middot;L<sup>-1</sup>to 4.35 mg&middot;L<sup>-1</sup>: spring&gt;winter&gt;summer&gt;autumn, annual total input was 1.32 &times; 10<sup>9</sup>kg,the seasonal input changed in the order of summer&gt;autumn&gt;spring&gt;winter, among them DON, NO<inf>3</inf><sup>-</sup>-N accounted for 30.35%-63.45% and 35.87%-67.72%, respectively. DOC was affected by precipitation and air temperature, and mainly came from the exogenous input, in the spring and summer its exogenous input increased with the increase of rainfall runoff, but in the autumn and winter the endogenous contribution increased; DTN was relatively affected by human emissions and water dilution. Correlation analysis showed that there was a significant negative correlation between DOC and DON (P&lt;0.05), DOC/DON ratio usually reflects the source of the DOM, the DOC/DON in the water of three gorges reservoir ranged from 0.35 to 7.28, the source of DOM had obvious seasonal characteristics. DOC/DON was the highest in summer, and the DOM mainly came from watershed erosion; DOC/DON was the lowest in winter, and the DOM mainly came from living sewage and endogenous field; the DOC/DON ratios in spring and autumn were higher than those in winter and lower than those in summer, and the DOM sources included watershed erosion, living sewage and endogenous field. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Reservoirs (water)
Controlled terms:Dissolution - Erosion - Nitrogen - Precipitation (meteorology) - Sewage - Watersheds
Uncontrolled terms:Correlation analysis - Dissolved nitrogen - Influencing factors - Negative correlation - Seasonal characteristics - Seasonal variation - Three gorges reservoir - Variation characteristics
Classification code:441.2  Reservoirs - 443.3  Precipitation - 444.1  Surface Water - 452.1  Sewage - 802.3  Chemical Operations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 6.40e-04kg/m3 to 9.07e-03kg/m3, Percentage 3.04e+01% to 6.35e+01%, Percentage 3.59e+01% to 6.77e+01%
DOI:10.13227/j.hjkx.201606031

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 187>

Accession number:20171003416423
Title:Spatial distribution and source of perfluorinated compounds in urban soil from part of cities in Anhui Province, China
Authors:Li, Fa-Song (1, 2, 3); Ni, Hui (1); Huang, Han-Yu (1); Xu, Zhi-Bing (1); Zhang, Qian (1); Li, Chang-Xia (1); Huang, Wen-Xiu (1); Jin, Tao-Sheng (2)
Author affiliation:(1) College of Environmental Resources, Anqing Normal University, Anqing; 246011, China; (2) Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin; 300071, China; (3) State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:327-332
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to explore the spatial distribution and source of perfluorinated compounds (PFCs), eleven mixed urban soil samples were collected from 7 cities in Anhui Province in 2013. Fifteen individual PFCs were detected by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS), and principal components analysis was used to trace the different sources of PFCs in urban soil. The results showed that the total concentration of PFCs (&sum;PFCs) ranged from 1.15 to 5.98 ng&middot;g<sup>-1</sup>dry weight (dw), with an average concentration of 2.69 ng&middot;g<sup>-1</sup>. perfluorooctane sulfonate (PFOS) with a concentration range of n.d. -3.56 ng&middot;g<sup>-1</sup>and an average concentration of 0.96 ng&middot;g<sup>-1</sup>was the dominant PFC contaminant, followed by perfluorooctane acid (PFOA) with a concentration range of n.d. -2.89 ng&middot;g<sup>-1</sup>and an average concentration of 0.64 ng&middot;g<sup>-1</sup>. The highest &sum;PFCs concentration in all selected mixed urban soil samples was from Chuzhou City with the value of 5.89 ng&middot;g<sup>-1</sup>, followed by Jingxian County of Xuancheng City (4.04 ng&middot;g<sup>-1</sup>). Interestingly, the PFOS concentration was as high as 3.56 ng&middot;g<sup>-1</sup>in Jingxian County, accounting for 88.1% of the total PFCs concentration, which might be influenced by paper industry in this area. Comparing to other soil samples in China, &sum;PFCs concentration of urban soil from Anhui Province was at middle level. Over 60% of &sum;PFCs in urban soil of Anhui province could be attributed to the four principal components, represented by PFOA, perfluorobutane sulfonate, perfluorododecanoic acid, perfluorobutane acid and PFOS. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Soil surveys
Controlled terms:Drug products - Liquid chromatography - Mass spectrometry - Paper and pulp industry - Principal component analysis - Soils - Spatial distribution
Uncontrolled terms:Anhui province - Perfluorinated compound (PFCs) - Perfluorinated compounds - Perfluorooctane sulfonates - Principal components analysis - Source - Ultra performance liquid chromatography tandem mass spectrometry (UPLC MS/MS) - Urban soils
Classification code:483.1  Soils and Soil Mechanics - 801  Chemistry - 811.1  Pulp and Paper - 921  Mathematics - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 6.00e+01%, Percentage 8.81e+01%
DOI:10.13227/j.hjkx.201605019

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 188>

Accession number:20171003409564
Title:Effects of different vegetation types and reclamation years on soil bacterial community structure in reclaimed mine areas
Authors:He, Long (1); Li, Yan-Qin (1); Li, Bin-Chun (1); Li, Jun-Jian (2)
Author affiliation:(1) Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan; 030006, China; (2) Institute of Loess Plateau, Shanxi University, Taiyuan; 030006, China
Corresponding author:Li, Yan-Qin(yanqin@sxu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:752-759
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Effects of different vegetation types (Ulmus pumila, Larix gmelinii, Armeniaca vulgaris, Picea asperata and Robinia pseudoacacia) and reclamation years (15 and 20 years) on soil bacterial community structure in reclaimed Antaibao opencast mine areas were investigated using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) and clone sequencing. For 20-year reclaimed soils, the significantly highest and lowest bacterial diversity were found in U. pumila and A. vulgaris stand, respectively, whereas no significant differences were found between the other three vegetation types. Under 15-year plantations, soil bacterial diversity index of P. asperata was significantly higher than that of R. pseudoacacia. Soil bacterial diversity index significantly increased in R. pseudoacacia planted soils but decreased in P. asperata treatment with the increase of reclaimed years. No significant change of soil bacterial community structure was observed in the same reclamation years based on the similarity coefficient analysis, cluster analysis and principal component analysis (PCA). Pearson correlation analysis demonstrated that bacterial diversity index was significantly positively correlated with soil pH. Nitrospira, Sphingomonas, Arthrobacter, Brachybacterium, Rhizobium as well as Mesorhizobium, which play important roles in the nitrogen cycle, degradation of polycyclic aromatic hydrocarbons and other organic matter, were identified by clone sequencing of the DGGE bands. Our results indicated that U. pumila and P. asperata were conducive to the recovery of soil bacterial diversity. The most dominant bacterial community from reclaimed mine soil would be beneficial for restoring wasteland contaminated soil and improving soil fertility. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Reclamation
Controlled terms:Aromatic hydrocarbons - Bacteria - Cloning - Cluster analysis - Correlation methods - Electrophoresis - Polycyclic aromatic hydrocarbons - Polymerase chain reaction - Principal component analysis - Social sciences  - Soil pollution - Soils - Vegetation
Uncontrolled terms:Bacterial community structure - Functional bacteria - Mine areas - PCR-DGGE - Pearson correlation analysis - Polymerase chain reaction-denaturing gradient gel electrophoreses (PCR-DGGE) - Similarity coefficients - Soil bacterial community
Classification code:461.8.1  Genetic Engineering - 483.1  Soils and Soil Mechanics - 723  Computer Software, Data Handling and Applications - 801  Chemistry - 804.1  Organic Compounds - 922.2  Mathematical Statistics - 971  Social Sciences
Numerical data indexing:Age 1.50e+01yr, Age 2.00e+01yr
DOI:10.13227/j.hjkx.201607200

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 189>

Accession number:20171003409559
Title:Compositions, sources and health risks of polycyclic aromatic hydrocarbons (PAHs) in surface dusts from driving-schools in a city of Henan Province, China
Authors:Chen, Yi-Nan (1); Ma, Jian-Hua (1, 2); Duan, Hai-Jing (1); Wei, Lin-Heng (1)
Author affiliation:(1) Institute of Natural Resources and Environment, Henan University, Kaifeng; 475004, China; (2) Collaborative Innovation Center on Yellow River Civilization of Henan Province, Kaifeng; 475004, China
Corresponding author:Ma, Jian-Hua(mjh@henu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:711-720
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The contamination of polycyclic aromatic hydrocarbons (PAHs) in surface dusts attracts great attentions due to their properties of threatening human health. Twenty-nine surface dust samples were collected from driving-schools in a city of Henan. Concentrations of 16 priority PAHs were analyzed by gas chromatography-mass spectrometry (GC-MS). The health risks exposed to dust PAHs for three different scenarios (working for 5 a, 10 a and 20 a in driving-school) were estimated by the health risk assessment model (ILCRs). Source identification was analyzed by diagnostic ratio, composition analysis, and principal component analysis. The results showed that concentrations of the &sum;PAHs in dusts ranged from 198.21 to 3 400.89 &mu;g&middot;kg<sup>-1</sup>, with a mean of 908.72 &mu;g&middot;kg<sup>-1</sup>. Among individual PAHs, the contents of naphthalene (Nap), phenanthrene (Phe), anthracene (Ant) and fluoranthene (Flu) were higher, and the content of dibenzo[a, h]anthracene (DBA) was the lowest. The dominant compounds were 2-3 ring PAHs, which accounted for 55.79%, while the 4-6 ring PAHs accounted for 44.21%. The health risks exposed to PAHs in dust in three different scenarios were 9.27&times;10<sup>-8</sup>, 1.85&times;10<sup>-7</sup>, and 3.71&times;10<sup>-7</sup>respectively; only sample J11 was with potential health risk in scenario 3, and the other samples were all without risks. Average daily doses by dermal contact of dust particles for the PAHs was the main exposure way. PAHs in dusts of driving-school were mainly originated from the combustion of fossil fuels and mixture combustion. The major sources of dust PAHs in farmland area driving-schools were natural gas and diesel combustion (56.44%), coal combustion (26.55%), gasoline combustion and the leakage (17.01%); dust PAHs in industrial area driving-schools were from mixture combustion (76.26%), gasoline combustion and the leakage (22.85%), coking and coal combustion (0.89%); and dust PAHs in mixed area driving-schools were from coal combustion (45.57%), natural gas and diesel combustion (45.41%), gasoline combustion and the leakage (9.02%). The concentrations and health risks of heavy metals in dusts were closely related to the surroundings around driving-schools and the previous land use status. &copy; 2017, Science Press. All right reserved.
Number of references:36
Main heading:Coal combustion
Controlled terms:Anthracene - Aromatic compounds - Aromatic hydrocarbons - Aromatization - Chemical analysis - Chromatography - Coal - Coal dust - Coking - Dust  - Elementary particle sources - Fossil fuels - Gas chromatography - Gasoline - Health - Health risks - Heavy metals - Hydrocarbons - Land use - Mass spectrometry  - Mixtures - Naphthalene - Natural gas - Polycyclic aromatic hydrocarbons - Principal component analysis - Risk assessment - Risk perception - Societies and institutions
Uncontrolled terms:Composition analysis - Diagnostic ratios - Diesel combustion - Driving-school - Gas chromatography-mass spectrometries (GC-MS) - Polycyclic aromatic hydrocarbons (PAHS) - Potential health risks - Source identification
Classification code:403  Urban and Regional Planning and Development - 451.1  Air Pollution Sources - 461.6  Medicine and Pharmacology - 461.7  Health Care - 522  Gas Fuels - 523  Liquid Fuels - 524  Solid Fuels - 531  Metallurgy and Metallography - 801  Chemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 901.1.1  Societies and Institutions - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.70e+01%, Percentage 2.29e+01%, Percentage 2.66e+01%, Percentage 4.42e+01%, Percentage 4.54e+01%, Percentage 4.56e+01%, Percentage 5.58e+01%, Percentage 5.64e+01%, Percentage 7.63e+01%, Percentage 8.90e-01%, Percentage 9.02e+00%
DOI:10.13227/j.hjkx.201607119

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 190>

Accession number:20171003416425
Title:Effects of different water managements and soil Eh on migration and accumulation of Cd in rice
Authors:Tian, Tao (1); Zeng, Min (1); Zhou, Hang (1); Xu, Jun (1); Yang, Wen-Tao (1); Gu, Jiao-Feng (1); Zou, Jia-Ling (1); Zhang, Ping (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
Corresponding author:Liao, Bo-Han(liaobh1020@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:343-351
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A pot experiment was conducted to study the effects of four modes of water managements on soil Eh values, bioavailability of soil Cd, migration and accumulation of Cd in rice. These four modes of water managements were moistening throughout the entire period of rice growth (M), moistening before filling stage and flooding after filling stage (M-F), flooding before filling stage and moistening after filling stage (F-M), and flooding throughout the entire period of rice growth (F). The results indicated that the exchangeable contents of Cd increased firstly and then declined with the soil Eh values changing from negative to positive. Compared with M, the other three modes (M-F, F-M, and F) significantly reduced the contents of Cd in all rice tissues, including roots, stems, husks and brown rice. Meanwhile, Cd contents in brown rice due to the treatments of M-F and F were 0.19 mg&middot;kg<sup>-1</sup>and 0.10 mg&middot;kg<sup>-1</sup>, respectively. These Cd contents were lower than the limits of 0.2 mg&middot;kg<sup>-1</sup>in national food safety standard (GB 2762-2012). Compared with M, the other three modes significantly decreased Cd accumulation amounts in the aboveground parts of rice and also decreased Cd translocation factors in rice. There were significant positive exponential relations between soil Eh values and Cd accumulation amounts in the aboveground parts of rice, Cd translocation factors in rice, or Cd contents in brown rice. The rice biomass due to M-F treatment reached the maximum among the four modes. It was worthy to be mentioned that although Weiyou 46 was considered a variety rice with high Cd accumulation, Cd content in rice brown of Weiyou 46 could be lower than 0.2 mg&middot;kg<sup>-1</sup>in the 5 mg&middot;kg<sup>-1</sup>of Cd contaminated soil through proper water managements. In summary, M-F treatment ensured high rice yield with low Cd contents in brown rice and could be recommended as the irrigation mode in rice production. Simultaneously, maintaining soil Eh value between -160-130 mV was also important after the filling stage. &copy; 2017, Science Press. All right reserved.
Number of references:40
Main heading:Soil pollution
Controlled terms:Bioaccumulation - Biochemistry - Filling - Floods - Food safety - Soils - Water management
Uncontrolled terms:Cd accumulation - Cd-contaminated soils - Exponential relation - Irrigation modes - Migration and accumulation - Rice - Rice production - Translocation factor
Classification code:461.6  Medicine and Pharmacology - 461.9  Biology - 483.1  Soils and Soil Mechanics - 691.2  Materials Handling Methods - 801.2  Biochemistry
Numerical data indexing:Voltage -1.60e-01V
DOI:10.13227/j.hjkx.201605234

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 191>

Accession number:20171003416401
Title:Characteristics of nitrogen transport and its source trace in loess plateau's dam watershed in alternating wet and dry seasons: a case study of yangjuangou watershed
Authors:Jia, Jun-Jie (1, 2); Gao, Yang (1, 2); Chen, Wei-Liang (1); Hao, Zhuo (1); Wang, Ya-Feng (3); Chen, Li-Ding (3)
Author affiliation:(1) Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China
Corresponding author:Gao, Yang(gaoyang@igsnrr.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:147-155
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this study, we wanted to explore the impacts of N wet deposition on N export and trace the N source by isotopic method through monitoring N wet deposition in Loess Plateau's Dam Watershed in alternating wet and dry seasons, through measuring N wet deposition, rainfall-runoff and base flow process and analyzing concentration change of different forms of N. The results showed that there were 11 rainfall events in the 2015 wet season, in which N wet deposition load reached 814.18 kg and N deposition flux was about 4.26 kg&middot;hm<sup>-2</sup>, while there were three rainfall events in the 2015 dry season, in which N wet deposition load reached 155.58 kg and N deposition flux was 0.83 kg&middot;hm<sup>-2</sup>, so it presented a great seasonal variability. By collecting the dynamic process of four rainfall events, we found that, different rainfall intensity had different influence on N export process. The contribution of N wet deposition of four rainfall events to N export in watershed was 16.94 kg. The ratio that N output load of rainfall and river in watershed N output load was 14.45%-64.84%, which showed that the contribution of rainfall to watershed N transport was big. The variation range of &delta;<sup>15</sup>N in Loess Plateau's Dam Watershed was big, which was -0.844&permil;-12.791&permil;, and the &delta;<sup>18</sup>O was within the range of 8.166 &permil;-15.115 &permil; in the dam watershed. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Watersheds
Controlled terms:Dams - Deposition - Drought - Isotopes - Landforms - Nitrogen - Rain - Runoff - Sediments
Uncontrolled terms:Alternating wet and dries - Concentration change - Loess Plateau - Nitrogen transport - Output load - Rainfall intensity - Seasonal variability - Wet deposition
Classification code:441.1  Dams - 443.3  Precipitation - 444.1  Surface Water - 481.1  Geology - 483  Soil Mechanics and Foundations - 802.3  Chemical Operations - 804  Chemical Products Generally
Numerical data indexing:Mass 1.56e+02kg, Mass 1.69e+01kg, Mass 8.14e+02kg, Percentage 1.44e+01% to 6.48e+01%
DOI:10.13227/j.hjkx.201604091

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 192>

Accession number:20171003416424
Title:Effects of biochar pyrolyzed at varying temperatures on soil organic carbon and its components: influence on the soil active organic carbon
Authors:Zhao, Shi-Xiang (1); Yu, Xiao-Ling (1); Li, Zhong-Hui (1); Yang, Yan (1); Liu, Dan (1); Wang, Xu-Dong (1, 2); Zhang, A-Feng (1)
Author affiliation:(1) College of Natural Resources and Environment, Northwest A&amp;F University, Yangling; 712100, China; (2) Key Laboratory Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling; 712100, China
Corresponding author:Zhang, A-Feng(zhangafeng@nwsuaf.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:333-342
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Soil active organic carbon is the most important carbon pool and a good indicator in ecosystem management due to its great significance in soil carbon cycling and soil quality. In order to investigate the effect of biochar(BC)addition on soil organic matter fractions, apple tree twigs were used to produce BC at 300, 400, 500 and 600&#8451;, respectively. Elemental analysis and Fourier transform infrared (FTIR) spectroscopy were used to determine the characteristics of BC. Four kinds of BC were added into soils at five application rates(0, 0.5%, 1%, 2% and 3%) and incubated at 25&#8451; in lab for over 360 days. Soil organic carbon (SOC), microbial biomass carbon (MBC), water soluble organic carbon (WSOC) and readily oxidized organic carbon (ROC) were measured during the incubation. The mass fraction of carbon (C) in the generated BC ranged from 62.20%-80.01%, while hydrogen (H) ranged from 2.72%-5.18% and Oxygen (O) ranged from 15.98%-30.92%. The increasing temperature increased the mass fraction of C, while decreased the O and H mass content, as well as the ratio of H/C and O/C. The addition of BC significantly increased SOC, and the treatments amended with BC500 had the highest increments. Compared with the control treatment (CK), the addition of BC produced at temperatures below 400&#8451; increased the contents of MBC, WSOC and ROC during the incubation, at the end of the incubation, BC300 treatments significantly increased the contents by 38.25%, 82.09% and 63.53% (P&lt;0.05), respectively; BC400 treatments significantly increased the contents by 26.07%, 65.61% and 48.09% (P&lt;0.05), respectively; while lower contents of MBC, WSOC and ROC were found in the treatments amended with BC produced at temperatures above 400&#8451; after 40-60 d incubation. After 360 d of incubation, the contents of MBC, WSOC and ROC were significantly decreased by 0.27%,13.48% and 14.67% in BC500 treatments and 7.80%,14.66% and 15.79% in BC600 treatments (except for the MBC in BC500 treatment) (P&lt;0.05). The relative contents of ROC ranged from 3.39% to 15.65%, BC application decreased the relative content of ROC, suggesting that the increase was in proportion to the stability of organic carbon in the soil. Considering the content and quality of SOC, when the BC products were applied to the Loutu soil, 500&#8451; was the optimal temperature for preparing apple-derived BC due to its significant increase of the soil organic carbon and a slight decrease of the relative content of soil active organic carbon. &copy; 2017, Science Press. All right reserved.
Number of references:50
Main heading:Organic carbon
Controlled terms:Fourier transform infrared spectroscopy - Fruits - Soils
Uncontrolled terms:Bio chars - Ecosystem management - Increasing temperatures - Microbial biomass carbon - Soil organic carbon - Soil organic matters - Varying temperature - Water-soluble organic carbon
Classification code:483.1  Soils and Soil Mechanics - 801  Chemistry - 804.1  Organic Compounds - 821.4  Agricultural Products
Numerical data indexing:Age 9.86e-01yr, Percentage 1.00e+00%, Percentage 1.47e+01%, Percentage 1.58e+01%, Percentage 1.60e+01% to 3.09e+01%, Percentage 2.00e+00%, Percentage 2.61e+01%, Percentage 2.70e-01%, Percentage 2.72e+00% to 5.18e+00%, Percentage 3.00e+00%, Percentage 3.39e+00% to 1.57e+01%, Percentage 3.82e+01%, Percentage 5.00e-01%, Percentage 6.22e+01% to 8.00e+01%, Percentage 6.56e+01%, Percentage 7.80e+00%, Percentage 8.21e+01%
DOI:10.13227/j.hjkx.201604058

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 193>

Accession number:20171003409531
Title:Variations in aerosol optical depth over three northeastern provinces of China, in 2003-2014
Authors:Zhang, Chen-He (1, 3); Zhao, Tian-Liang (1); Wang, Fu (2); Xu, Xiang-De (3); Su, Hang (4); Cheng, Xing-Hong (3); Tan, Cheng-Hao (1)
Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China; (2) National Satellite Meteorological Center, China Meteorological Administration, Beijing; 100081, China; (3) State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing; 100081, China; (4) Meteorological Observatory of Liaoning Province, Shenyang; 110166, China
Corresponding author:Zhao, Tian-Liang(josef_zhao@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:476-484
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on the MODIS-Aqua aerosol optical depth (AOD) products from 2003 to 2014, Nighttime Lights Time data from DMSP satellites and basic meteorological data, the AOD spatial distributions of interannual and seasonal variations over three northeastern provinces of China(Liaoning, Jilin, Heilongjiang) were analyzed. It was found that there was a northeast-southwest area of high annual average AOD composed of Dalian, Shenyang, Changchun, Harbin and other cities, the 12-year average AOD value was 0.4-0.8. The low AOD occurred in the eastern and northern areas of the three northeastern provinces of China, where the forest-covering rate was high, and the 12-year average AOD value was less than 0.3. The seasonal variations of annual average AOD showed an increasing trend from spring to summer, then decreased in autumn and increased again in winter. The interannual variations of AOD over three northeastern provinces of China showed a decreasing trend in most areas, but the increasing trend occurred in the northeast-southwest region with the axis formed by Shenyang, Changchun and Harbin, revealing the polarization in recent 10 years over three northeastern provinces of China. In addition, spatial distribution of annual average AOD over three northeastern provinces of China in the years of strong and weak Western North Pacific Summer Monsoon was studied. Affected by the surface wind field, annual average AOD in weak monsoon years was higher than that in strong monsoon years. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Atmospheric thermodynamics
Controlled terms:Aerosols - Atmospheric aerosols - Meteorology - Optical properties - Radiometers - Spatial distribution
Uncontrolled terms:Aerosol optical depths - Interannual variation - MODIS - Three northeastern provinces of China - Western north pacific summer monsoons
Classification code:443.1  Atmospheric Properties - 741.1  Light/Optics - 921  Mathematics - 944.7  Radiation Measuring Instruments
Numerical data indexing:Age 1.00e+01yr, Age 1.20e+01yr
DOI:10.13227/j.hjkx.201608043

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 194>

Accession number:20171003416420
Title:Effects of different agricultural practices on soil carbon pool in North China Plain
Authors:Shi, Xiao-Xia (1); Zhao, Yi (1); Zhang, Lin (1); Wu, Wen-Liang (1); Meng, Fan-Qiao (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China
Corresponding author:Meng, Fan-Qiao(mengfq@cau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:301-308
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:North China Plain is an important region of grain production. Soil fertility and grain production in this region are significantly influenced by the levels of soil carbon and nitrogen. In order to explore the effects of agricultural practices on the levels of soil carbon and nitrogen, a long-term field experiment was started in 1999 in Quzhou County, Hebei Province. Four treatments, including following nature (F), tillage without straw (N), no tillage with crushed straw incorporation (S), and tillage with crushed straw incorporation (TS), were chosen to collect soil samples at the layers of 0-20 cm and 20-40 cm in 2013. Soil organic carbon (SOC), soil inorganic carbon (SIC), total carbon (TC), total nitrogen (TN), &delta;<sup>13</sup>C<inf>SOC</inf>, &delta;<sup>13</sup>C<inf>SIC</inf>and &delta;<sup>15</sup>N were analyzed. The results indicated that compared with F, SOC stocks of N, S and TS decreased by 21.6%, 12.3% and 3.4% in the 0-20 cm soil layer, but the changes of SIC stocks were not significant. In the 20-40 cm soil layer, the changes of the SOC stocks were not significant, but the SIC stocks increased by 4.1% (N), 7.3% (S) and 5.0% (TS) compared to F, respectively. Major contribution of SIC increase was the pedogenic inorganic carbonate (PIC), which increased by 97%-261% in the farmland soil. In the soil layer of 0-20 cm, the values of &delta;<sup>15</sup>N, &delta;<sup>13</sup>C<inf>SIC</inf>and &delta;<sup>13</sup>C<inf>SOC</inf>in the farmland treatments were higher than those of F, meanwhile, the values of &delta;<sup>13</sup>C<inf>SOC</inf>were significantly higher than that of F. In the soil layer of 20-40 cm, the values of &delta;<sup>15</sup>N and &delta;<sup>13</sup>C<inf>SIC</inf>were lower than those of F, but the value of &delta;<sup>13</sup>C<inf>SOC</inf>showed the opposite trend. In North China Plain, lithogenic inorganic carbonate (LIC) of farmland soil decomposed and PIC increased by the soil-crop system, which provided CO<inf>2</inf>for the formation of PIC, and straw returning was an effective agricultural practice to restore the soil carbon decreased by tillage. There should be more long-term monitoring and studies for the impacts of crop straw incorporation and tillage on SOC and SIC, especially for soil in deeper layers. &copy; 2017, Science Press. All right reserved.
Number of references:40
Main heading:Soils
Controlled terms:Agricultural machinery - Agriculture - Carbon - Carbon dioxide - Crops - Farms - Grain (agricultural product) - Nitrogen - Organic carbon - Soil surveys
Uncontrolled terms:Crop straws - Natural isotopes - North China Plain - Soil inorganic carbons - Soil organic carbon
Classification code:483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 1.23e+01%, Percentage 2.16e+01%, Percentage 3.40e+00%, Percentage 9.70e+01% to 2.61e+02%, Size 0.00e+00m to 2.00e-01m, Size 2.00e-01m to 4.00e-01m
DOI:10.13227/j.hjkx.201605212

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 195>

Accession number:20172703864515
Title:Concentration Characteristics and Sources of Trace Metals in PM<inf>2.5</inf>During Wintertime in Beijing
Authors:Qiao, Bao-Wen (1, 2); Liu, Zi-Rui (2); Hu, Bo (2); Liu, Jing-Yun (1, 2); Pang, Ni-Ni (1, 2); Wu, Fang-Kun (2); Xu, Zhong-Jun (1); Wang, Yue-Si (2)
Author affiliation:(1) Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing; 100029, 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:Xu, Zhong-Jun(xuzj@mail.buct.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:876-883
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To study the characteristics and sources of trace metals in PM<inf>2.5</inf>during wintertime in Beijing, PM<inf>2.5</inf>samples were collected from December 2014 to January 2015 by a middle volume sampler in the urban area of Beijing for 30 consecutive days. The mass concentration of PM<inf>2.5</inf>was measured by filter membrane weighting method, and 16 kinds of trace metals were determined by inductively couple plasma-mass spectrometry (ICP-MS). In addition, the pollution characteristics and sources of trace metals were analyzed by enrichment factor (EF) method and factor analysis, respectively. The results showed that the concentrations of five elements (i.e. K, Ca, Fe, Al and Mg) accounted for 90.7% of the total metal elements. The concentrations of the metal elements changed obviously between day and night. Compared with daytime, crustal elements like Mg and Al decreased by more than 30% while anthropogenic elements like Cu and Pb increased by more than 40% in nighttime. Although the concentrations of metal elements increased by nearly one time in heavy pollution days compared with clean days, the mass percent of which in PM<inf>2.5</inf>decreased from 10.9% in clean days to 4.6% in heavy pollution days. This result suggested the accumulation of metal elements in heavy pollution days had a minor contribution to the increased mass concentration of PM<inf>2.5</inf>. As the pollution episode progressed, anthropogenic elements (Cu, Zn, As, Se, Ag and Cd) increased faster than crustal elements (Al, Mg, Ca, Mn and Fe), which showed ratios ranging from 2.9 to 5.3 for anthropogenic elements and ratios ranging from 1.2 to 1.8 for crustal elements, when compared between heavy pollution days and clean days. In addition, the EF value of anthropogenic elements was also increased in the pollution days, indicating the concentrations of these elements was further influenced by the anthropogenic sources. Factor analysis showed that metal elements of PM<inf>2.5</inf>during wintertime of Beijing were mainly from coal combustion and biomass burning, motor vehicle and industry emissions, and re-suspension of road dust, with the contributions of 34.2%, 25.5% and 17.1%, respectively. &copy; 2017, Science Press. All right reserved.
Number of references:42
Main heading:Trace elements
Controlled terms:Aluminum - Calcium - Coal combustion - Coal dust - Coal industry - Factor analysis - Lead - Magnesium - Magnetic levitation vehicles - Mass spectrometry  - Metal analysis - Metals - Multivariant analysis - Pollution
Uncontrolled terms:Anthropogenic elements - Anthropogenic sources - Beijing - Enrichment factors - Industry emissions - Mass concentration - Metal elements - Plasma mass spectrometry
Classification code:503  Mines and Mining, Coal - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 541.1  Aluminum - 546.1  Lead and Alloys - 549.2  Alkaline Earth Metals - 801  Chemistry - 922  Statistical Methods - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.09e+01%, Percentage 1.71e+01%, Percentage 2.55e+01%, Percentage 3.00e+01%, Percentage 3.42e+01%, Percentage 4.00e+01%, Percentage 4.60e+00%, Percentage 9.07e+01%
DOI:10.13227/j.hjkx.201607144

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 196>

Accession number:20172703864537
Title:Enhanced Removal of Herbicide 2,4-dichlorophenoxyacetic Acid and Simultaneous Power Generation in Microbial Fuel Cells
Authors:Quan, Xiang-Chun (1); Quan, Yan-Ping (1); Xiao, Zhu-Tian (1)
Author affiliation:(1) State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing; 100875, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1067-1073
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study investigated the effects of a widely used herbicide 2,4-dichlorophenoxyacetic acid on power generation, pollutants removal from microbial fuel cells (MFCs) and microbial community changes, and also explored anode pre-aeration for enhanced 2,4-D removal and power generation. The results showed that when 2,4-D was inputted to the anode chamber of MFCs which was previously enriched with acetate sodium as the fuel, the voltage output and power density declined and the internal resistance increased apparently. The maximum power density declined to 0.057 W&middot;m<sup>-2</sup>in the presence of 300 mg&middot;L<sup>-1</sup>2,4-D comparing to 0.151 W&middot;m<sup>-2</sup>obtained with acetate alone (850 mg&middot;L<sup>-1</sup>), and the internal resistance increased from 524 &Omega; to 1 230 &Omega; correspondingly. To accelerate 2,4-D removal rate and reduce its inhibition to anode exoelectrogens, 6h pre-aeration was applied to the anode chamber. Fast removal of 2,4-D was achieved during aeration period and simultaneous high maximum voltage output (0.42-0.47 V) was obtained. Anode microbial community changed after 2,4-D addition and several 2,4-D degrading bacteria and 2,4-D tolerant exoelectrogen were enriched. MFCs could be used for 2,4-D removal and simultaneous power generation through anode pre-aeration. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Microbial fuel cells
Controlled terms:Anodes - Biodegradation - Electrodes - Fuel cells - Herbicides - Microorganisms - Weed control
Uncontrolled terms:2 ,4-dichlorophenoxyacetic acid - Anode aerations - Internal resistance - Maximum power density - Microbial communities - Microbial fuel cells (MFCs) - Pollutants removal - Recalcitrant organics
Classification code:461.8  Biotechnology - 461.9  Biology - 702.2  Fuel Cells - 714.1  Electron Tubes - 804.1  Organic Compounds
Numerical data indexing:Electrical_Resistance 5.24e+02Ohms to 1.23e+03Ohms, Mass_Density 8.50e-01kg/m3, Surface_Power_Density 1.51e-01W/m2, Surface_Power_Density 5.70e-02W/m2, Time 2.16e+04s, Voltage 4.20e-01V to 4.70e-01V
DOI:10.13227/j.hjkx.201608126

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 197>

Accession number:20172703864548
Title:Influencing Mechanism of Calcium Peroxide Pre-treatment on Dewatering Performance of Waste Activated Sludge
Authors:Bai, Run-Ying (1); Chen, Zhan (1, 2); Zhang, Wei-Jun (3); Wang, Dong-Sheng (2, 3)
Author affiliation:(1) School of Civil Engineering, Inner Mongolia University of Technology, Hohhot; 010051, China; (2) State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China
Corresponding author:Zhang, Wei-Jun(zhwj_1986@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1151-1158
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The evolution of sludge filteration dewaterability, floc structure and hydrolytic kinetics with calcium peroxide oxidation pre-treatment was investigated in this study. The effect of sludge characteristics with combined process of ferrous ion and calcium peroxide was deeply analyzed and the result suggested that the sludge dewatering performance was improved first and then worsened after CaO<inf>2</inf>addition. When the dosage was 20 mg&middot;g<sup>-1</sup>, sludge reached its optimal dewaterability. At the same time, sludge was effectively dissolved and the floc structure became loose and broken with the increase of organic matters in the supernatant. Moreover, sludge solubilization process followed the pseudo-zero-order kinetic equation well and the reaction rate of sludge with CaO<inf>2</inf>treatment was 15.2 mg&middot;L<sup>-1</sup>&middot;h<sup>-1</sup>. In addition, sludge floc lysis was enhanced by the treatment of ferrous ion and calcium peroxide oxidation, whilst sludge dewaterability was improved due to the reconstruction of sludge floc structure by the iron ions produced. This study provided theoretical basis for application of calcium peroxide pre-treatment and its combining technique in sludge treatment. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Waste treatment
Controlled terms:Calcium - Dewatering - Integral equations - Ions - Iron - Metal ions - Oxidation - Peroxides
Uncontrolled terms:Activated sludge - Calcium peroxides - Dewaterability - Ferrous ion - Influencing mechanisms - Oxidation pre-treatment - Pseudo-zero-order kinetics - Waste activated sludges
Classification code:452.4  Industrial Wastes Treatment and Disposal - 531.1  Metallurgy - 545.1  Iron - 549.2  Alkaline Earth Metals - 802.2  Chemical Reactions - 802.3  Chemical Operations - 921.2  Calculus
DOI:10.13227/j.hjkx.201607056

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 198>

Accession number:20172703864525
Title:Seasonal Pollution Characteristics and Source Identification of Polycyclic Aromatic Hydrocarbons and Organochlorine Pesticides in Surface Water of Baiyangdian Lake
Authors:Wang, Yi-Zhen (1, 2); Zhang, Jun (1); Zhou, Xu-Shen (1); Kong, Fan-Qing (1); Xu, Ming-Xia (1)
Author affiliation:(1) Haihe River Water Environmental Monitoring Center, Tianjin; 300170, China; (2) Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Nankai University, Tianjin; 300071, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:964-978
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Seasonal variations of 17 polycyclic aromatic hydrocarbons (PAHs) and 15 persistent organochlorine pesticides (OCPs) were analyzed during spring and summer in surface water from 12 sampling sites of Baiyangdian lake to elucidate their seasonal pollution characteristics and sources. The results showed that total concentrations of PAHs in surface water of Baiyangdian lake ranged from 35.38 to 88.06 ng&middot;L<sup>-1</sup>(46.57 ng&middot;L<sup>-1</sup>in average) in spring and 25.64 to 301.41 ng&middot;L<sup>-1</sup>(76.23 ng&middot;L<sup>-1</sup>in average) in summer, respectively, and total concentrations of OCPs ranged from 0.69 to 4.50 ng&middot;L<sup>-1</sup>(1.77 ng&middot;L<sup>-1</sup>in average) in spring and 0.11 to 3.20 ng&middot;L<sup>-1</sup>(0.90 ng&middot;L<sup>-1</sup>in average) in summer, respectively. Seasonal pollution characteristics of PAHs in surface water during two different seasons showed that the total concentration of PAHs was much higher in summer than in spring at three sampling sites of Baiyangdian lake including Qiantang, Guancheng and Anxin bridge, and the level of PAHs in spring was much higher than that in summer at the other nine sites. While seasonal pollution characteristics of OCPs showed that the total concentration of OCPs was much higher in summer than in spring in samples of Guancheng sites, and the level of OCPs in spring was slightly higher than that in summer in the rest of samples. From the perspective of spatial and temporal variations in the composition patterns of PAHs and OCPs in surface water of Baiyangdian lake, PAHs were predominated by 3-ring PAHs with 45.92% and 61.36% (52.60% in average) of total PAHs in spring, while in summer Nap was the chief component of 2-ring PAHs in three sampling sites including Qiantang, Guancheng and Anxin bridge with 84.91%, 91.04% and 78.10% of the total, respectively, and 3-ring PAHs were primary pollutants in the other nine sites with 37.14% to 53.90% (48.94% in average) of the total. Residues of HCHs and DDTs were detected in different degrees and &beta;-HCH was the main pollutant at all sampling sites with 29.94% and 100% (59.87% in average) of total HCHs in spring, while &beta;-HCH was the predominant compounds at five sampling sites with 57.55% and 80.23% (61.98% in average) in summer and &alpha;-HCHs and &delta;-HCH were abundant at other sampling sites. Source analysis based on isomer ratios indicated that the main source of PAHs in Baiyangdian lake originated from combustion sources, and additional sources for several sampling sites could be petroleum processes. Ratios of HCH isomers and DDT congeners confirmed that environmental historical residues and long range atmospheric transport were the major sources of OCPs contamination in the study area. Compared with the water quality standard of China and other countries or organizations, concentrations of PAHs and OCPs in surface water of Baiyangdian lake did not exceed the target values of the standard. However, the concentrations of &alpha;-HCH and p,p'-DDD in Anxin bridge and Quantou sites exceeded the limit of human health ambient water quality criteria developed by EPA, which reflected that &alpha;-HCH and p,p'-DDD would have a potential hazards risk to the residents from Baiyangdian district. &copy; 2017, Science Press. All right reserved.
Number of references:85
Main heading:Lake pollution
Controlled terms:Aromatic compounds - Aromatic hydrocarbons - Aromatization - Atmospheric movements - Environmental Protection Agency - Health hazards - Health risks - Hydrocarbons - Isomers - Lakes  - Organic pollutants - Pesticides - Pollution - Polycyclic aromatic hydrocarbons - River pollution - Surface waters - Water pollution - Water quality
Uncontrolled terms:Baiyangdian lakes - Long-range atmospheric transports - Organochlorine pesticides - Persistent organochlorine pesticides - Polycyclic aromatic hydrocarbons (PAHS) - Source apportionment - Spatial and temporal variation - Water quality standard
Classification code:443.1  Atmospheric Properties - 444.1  Surface Water - 445.2  Water Analysis - 453  Water Pollution - 454.2  Environmental Impact and Protection - 461.7  Health Care - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Mass_Density 1.77e-09kg/m3, Mass_Density 4.66e-08kg/m3, Mass_Density 7.62e-08kg/m3, Mass_Density 9.00e-10kg/m3, Percentage 2.99e+01%, Percentage 4.59e+01%, Percentage 4.89e+01%, Percentage 5.26e+01%, Percentage 5.75e+01%, Percentage 5.99e+01%, Percentage 6.20e+01%, Percentage 7.81e+01%, Percentage 8.49e+01%, Percentage 9.10e+01%
DOI:10.13227/j.hjkx.201608150

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 199>

Accession number:20172703864540
Title:Effect of Wastewater Nitrogen Concentrations on Nitrogen Removal Ability of Myriophyllum aquaticum
Authors:Ma, Yong-Fei (1); Yang, Xiao-Zhen (1); Zhao, Xiao-Hu (1); Hu, Cheng-Xiao (1, 3); Tan, Qi-Ling (1); Sun, Xue-Cheng (1); Wu, Jin-Shui (2)
Author affiliation:(1) College of Resource and Environmental Science, Huazhong Agricultural University, Wuhan; 430070, China; (2) Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410000, China; (3) Hubei Provincial Engineering Laboratory for New-type Fertilizer, Wuhan; 430070, China
Corresponding author:Hu, Cheng-Xiao(hucx@mail.hzau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1093-1101
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Myriophyllum aquaticum, which is an important plant for constructed wetlands, has powerful purification ability for wastewater, however, the relationship between nitrogen removal ability of Myriophyllum aquaticum and wastewater nitrogen concentrations is still unclear. In this study, pot culture experiment was conducted to investigate the effect of wastewater nitrogen levels on nitrogen removal ability of Myriophyllum aquaticum. 7 nitrogen levels were set up as following: 2, 5, 10, 20, 100, 200, 400 mg&middot;L<sup>-1</sup>. The results showed that when the wastewater nitrogen concentration was not higher than 20 mg&middot;L<sup>-1</sup>, Myriophyllum aquaticum with 20 mg&middot;L<sup>-1</sup>of nitrogen concentration grew best in the first 3 weeks; the removal rates of total and ammonia nitrogen were nearly 100% after one week, while the nitrate nitrogen concentrations were very low and varied little; the nitrogen contents of Myriophyllum aquaticum had no significant change, the upper part nitrogen content was higher than the underneath, Myriophyllum aquaticum could also remove nitrogen from the sediment. When wastewater nitrogen concentrations were 100-400 mg&middot;L<sup>-1</sup>, Myriophyllum aquaticum with 200 mg&middot;L<sup>-1</sup>of nitrogen concentration grew best from 4th to 5th week; the removal rates of total nitrogen were 76.5%, 71.5% and 48.1% in the three treatments, and the removal rates of ammonia nitrogen were 99.6%, 99.3% and 60.2% respectively, while the removal rates of nitrate nitrogen were all about 50% and there was no significant difference among treatments; the nitrogen contents of Myriophyllum aquaticum increased with nitrogen levels, but the difference between upper part and underneath was not remarkable, showing uniform distribution; nitrogen accumulations by Myriophyllum aquaticum and sediment accounted for 27.9%-48.4% and 12.2%-24.4% of total nitrogen loss in wastewater. Therefore, the nitrogen removal ability of Myriophyllum aquaticum should be inhibited by higher wastewater nitrogen level, the ammonia nitrogen removal rate was significantly higher than nitrate, the mechanism of Myriophyllum aquaticum nitrogen accumulation and distribution should also be affected by wastewater nitrogen level, and further research is needed. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Nitrogen removal
Controlled terms:Ammonia - Grain (agricultural product) - Nitrates - Nitrogen - Wastewater - Wastewater treatment - Wetlands
Uncontrolled terms:Ammonia nitrogen - Ammonia nitrogen removal - Myriophyllum aquaticum - Nitrate nitrogen - Nitrogen accumulation - Nitrogen concentrations - Nitrogen removal rates - Uniform distribution
Classification code:452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 821.4  Agricultural Products
Numerical data indexing:Mass_Density 1.00e-01kg/m3 to 4.00e-01kg/m3, Mass_Density 2.00e-01kg/m3, Mass_Density 2.00e-02kg/m3, Mass_Density 4.00e-01kg/m3, Percentage 1.00e+02%, Percentage 1.22e+01% to 2.44e+01%, Percentage 2.79e+01% to 4.84e+01%, Percentage 4.81e+01%, Percentage 5.00e+01%, Percentage 6.02e+01%, Percentage 7.15e+01%, Percentage 7.65e+01%, Percentage 9.93e+01%, Percentage 9.96e+01%
DOI:10.13227/j.hjkx.201606098

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 200>

Accession number:20172703864523
Title:Nitrification and Denitrification Rates in a Small Tributary, Nanhe River, of Three Gorge Dam Reservoir During Water Collection and Release Events
Authors:Wang, Jing (1, 2); Liu, Hong-Jie (2); Lei, Yu (2); Xu, Jing (2); Song, Li-Yan (2, 3); Li, Yong (1)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Environmental Microbiology and Ecology Research Center, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China; (3) Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China
Corresponding author:Song, Li-Yan(songliyan@cigit.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:946-953
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Three Gorge Dam Reservoir (TGDR) is a new forming ecosystem and its sediments dynamics remains unknown. Investigation on the nitrification and denitrification dynamics of sediments of TGDR during water collection and release events-anti-seasonal actions-is critical for nitrogen management in TGDR. In this study, we sampled sediments in three locations (upstream, center, and downstream along water flow) of South River, located in a typical small tributary, Nanhe, in TGDR during 2015 water collection and release events to characterize its physiochemical property and determine its nitrification and denitrification rates using acetylene inhabitation method. The results showed that the concentrations of physiochemical parameters of sediments (total carbon, total nitrogen, nitrate, and ammonia) were significantly higher (P&lt;0.05) in water collection event than those in water release event, suggesting there were external materials (e.g., soil) entering into TGDR. Furthermore, the nitrification rate of sediments in water collection event [194.06 &mu;mol&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>] was significantly higher than that in water release event [16.52 &mu;mol&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>]. Sediments nitrification rate was positively correlated to the physiochemical parameters. In contract, the denitrification rate of sediments was higher in water release event [647.20 &mu;mol&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>] than that in water collection event [24.04 &mu;mol&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>). Accordingly, the denitrification rate of sediments was negatively correlated to the physiochemical parameters. &copy; 2017, Science Press. All right reserved.
Number of references:47
Main heading:Rivers
Controlled terms:Carbon - Denitrification - Nitrification - Nitrogen - Reservoirs (water) - Sediments - Water resources
Uncontrolled terms:Dam reservoirs - Denitrification rate - Nitrification rates - Small tributaries - Water collection - Water release
Classification code:441.2  Reservoirs - 444  Water Resources - 483  Soil Mechanics and Foundations - 802.2  Chemical Reactions - 804  Chemical Products Generally
DOI:10.13227/j.hjkx.201606202

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 201>

Accession number:20172703864528
Title:Distribution Characteristics and Health Risk Assessment of Heavy Metals in Surface Water Around Electroplating Factories
Authors:Yu, Cong-Cong (1); Zhao, Wei-Tuo (2); Gao, Xiao-Feng (3); Cheng, Sheng-Gao (1); Huang, Ting (1); Yin, Yi-Meng (1); Zhao, Zhen-Li (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; (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:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:993-1001
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the distribution characteristics and the human health risks of heavy metals in surface water samples, 30 samples were collected around electroplating factories of Machong, Shatian, Humen, Changan and Dalingshan towns in Dongguan city, 8 heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb and Zn) contents were measured and analyzed by using multivariate statistical analysis method and human health risk assessment model. The results showed that the maximum concentrations of Cr, Pb and the average concentration of Hg exceeded Environmental Quality Standards for Surface Water (GB 3838-2002, Grade III), the concentrations of Cr, Cu, Hg, Ni, Zn and Pb during rainy season were all higher than that those during dry season. Multivariate statistical analysis indicated that Cd, Cr, Cu, Ni and Zn mainly originated from the contaminated electroplating factories, Pb and Hg were mainly affected by the traffic sources, and As was significantly correlated with natural sources. Health risk assessment result of surface water indicated that heavy metal pollution would lead to high health risks especially for children, and the health risks of heavy metals through drinking pathway were 2-3 orders of magnitude higher than the values caused by dermal contact pathway. Moreover, carcinogenic risks caused by Cr and As were higher than the maximum allowance levels (5&times;10<sup>-5</sup>a<sup>-1</sup>), and non-carcinogenic risks of the heavy metals (10<sup>-10</sup>-10<sup>-7</sup>a<sup>-1</sup>) decreased in the order of Pb&gt;Ni&gt;Cu&gt;Hg&gt;Zn, which were 4-5 orders of magnitude lower than the maximum allowance levels. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Risk assessment
Controlled terms:Cadmium - Copper - Electron emission - Electroplating - Health - Health risks - Heavy metals - Lead - Metal analysis - Multivariant analysis  - Nickel - Potable water - River pollution - Statistical methods - Surface waters - Water pollution - Zinc
Uncontrolled terms:Average concentration - Distribution characteristics - Environmental quality standards - Heavy metal pollution - Human health risk assessment - Maximum concentrations - Multivariate statistical analysis - Orders of magnitude
Classification code:444  Water Resources - 444.1  Surface Water - 453  Water Pollution - 461.6  Medicine and Pharmacology - 461.7  Health Care - 531  Metallurgy and Metallography - 539.3.1  Electroplating - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 914.1  Accidents and Accident Prevention - 922  Statistical Methods - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201607159

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 202>

Accession number:20172703864549
Title:Treatment Effects of Earthworm Constructed Wetlands in Different Working Conditions
Authors:Dong, Meng-Ke (1); Li, Huai-Zheng (1); Xu, Yi-Xiao (1)
Author affiliation:(1) College of Environmental Science and Engineering, Tongji University, Shanghai; 200092, China
Corresponding author:Li, Huai-Zheng(lihz@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1159-1166
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The feasibility of a new sludge treatment technology of earthworm constructed wetlands was tested by adding earthworm into the traditional sludge dying reed beds. The dewatering and stabilization effects of the upper layer sludge were tested under different sludge loading rates of 48, 65, 80 kg&middot;(m<sup>2</sup>&middot;a)<sup>-1</sup>, different earthworm stocking densities of 0, 0.43, 0.54, 0.65 kg&middot;m<sup>-2</sup>and different sludge loading frequencies. The results indicated that it was feasible to provide a shelter for earthworm during the loading period by setting a damper with a buried depth of 10 mm. The addition of earthworm could effectively improve the dewatering and stabilization effects of earthworm constructed wetlands, by lowering the DHA and decreasing the moisture content and VS of sludge by 15% and 10% respectively. The stabilization effects of earthworm constructed wetlands reached the best under the stocking density of 0.65 kg&middot;m<sup>-2</sup>. With the increase of sludge loading rate and decrease of loading frequency, the running efficiency of earthworm constructed wetlands would be worse. &copy; 2017, Science Press. All right reserved.
Number of references:23
Main heading:Wetlands
Controlled terms:Dewatering - Stabilization
Uncontrolled terms:Constructed wetlands - Earthworm - Reed bed - Sludge dewatering - Sludge stabilization
Classification code:802.3  Chemical Operations
Numerical data indexing:Percentage 1.00e+01%, Percentage 1.50e+01%, Size 1.00e-02m
DOI:10.13227/j.hjkx.201609212

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 203>

Accession number:20172703864546
Title:Identification and Influence of Quorum Sensing on Anaerobic Ammonium Oxidation Process
Authors:Chen, Shu-Han (1); Li, An-Jie (1); Wang, Yue-Xing (2); Wu, Ling-Juan (1)
Author affiliation:(1) Key Laboratory of Water and Sediment Sciences, School of Environment, Beijing Normal University, Beijing; 100875, China; (2) Shenzhen Water Group Co., Ltd., Shenzhen; 518001, China
Corresponding author:Li, An-Jie(liaj@bnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1137-1143
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Anaerobic ammonium oxidation (ANAMMOX), an innovative nitrogen removal technology, has good prospects for applications. However, ANAMMOX bacteria grow slowly and are hardly accumulated in bioreactors. In this study, a UASB reactor inoculated with sludge from landfill leachate treatment plant was used for the start-up of ANAMMOX process. Besides, exogenous quorum sensing signals (DSF and AHL) were added to improve the adhesion of ANAMMOX sludge. The results showed that the UASB successfully started the ANAMMOX process within 150 days of operation. The total nitrogen removal rate reached 80% and the proportion of ANAMMOX bacteria rose to 20%. There was a low concentration of AHLs signal molecules in the ANAMMOX sludge. If the &beta;-position substituent group of AHL added was a carbonyl group (including 3-oxo-C<inf>6</inf>-HSL, 3-oxo-C<inf>8</inf>-HSL, 3-oxo-C<inf>10</inf>-HSL and 3-oxo-C<inf>12</inf>-HSL), the adhesion growth ability of the ANAMMOX sludge could be improved. In the case of dosing with AHL molecules without &beta;-position substituent groups, only C<inf>6</inf>-HSL and C<inf>12</inf>-HSL could promote the adhesion of ANAMMOX sludge. The additions of C<inf>8</inf>-HSL, C<inf>10</inf>-HSL and DSF all had negative effects on the adhesion of ANAMMOX sludge. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Nitrogen removal
Controlled terms:Adhesion - Bacteria - Leachate treatment - Molecules - Nitrogen - Oxidation - Wastewater treatment
Uncontrolled terms:Anaerobic ammonium oxidation - Anammox bacteria - Landfill leachate treatment - Low concentrations - Microbial community structures - N-Acyl Homoserine lactones - Quorum-sensing - Total nitrogen removal
Classification code:452.4  Industrial Wastes Treatment and Disposal - 802.2  Chemical Reactions - 804  Chemical Products Generally - 931.3  Atomic and Molecular Physics - 951  Materials Science
Numerical data indexing:Age 4.11e-01yr, Percentage 2.00e+01%, Percentage 8.00e+01%
DOI:10.13227/j.hjkx.201607027

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 204>

Accession number:20172703864543
Title:Quick Start-up of Anaerobic Ammonium Oxidation Process
Authors:L&uuml;, Gang (1); Xu, Le-Zhong (1, 2, 3); Shen, Yao-Liang (1, 2, 3); Wu, Peng (1, 2, 3); Zhang, Ting (1); Cheng, Chao-Yang (1)
Author affiliation:(1) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (2) Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou; 215009, China; (3) Jiangsu Key Laboratory of Environmental Science and Engineering, Suzhou; 215009, China
Corresponding author:Xu, Le-Zhong(kgre505@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1116-1121
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the quick start-up process of anaerobic ammonium oxidation (ANAMMOX), two types of reactors with different hydraclic flow state inoculated with aerobic nitrifying sludge were investigated, the membrane bioreactor (MBR) and anaerobic baffled reactor (ABR), respectively. The result showed that both reactors successfully started up ANAMMOX process. The start-up period of the MBR (90 d) was 20% shorter than the ABR (111 d). During the stable operation, the average nitrogen (NH<inf>4</inf><sup>+</sup>-N+NO<inf>2</inf><sup>-</sup>-N) removal capacity of 0.098 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>in the MBR was also higher than that of 0.089 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>in the ABR. In addition, the differences of sludge morphology were obvious in the two reactors; flocculent sludge was developed in the MBR while ANAMMOX granular sludge was mainly formed in the first compartment of the ABR. Moreover, the quantitative relationship analysis between NH<inf>4</inf><sup>+</sup>-N, NO<inf>2</inf><sup>-</sup>-N and NO<inf>3</inf><sup>-</sup>-N showed that the MBR system contained more kinds of bacteria with nitrogen removal function, compared to the ABR, and it was therefore more conducive to the removal of nitrogen. MBR exhibited a more excellent performance for ANAMMOX start-up. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Nitrogen removal
Controlled terms:Bioreactors - Nitrogen - Nitrogen compounds - Nitrogen oxides - Oxidation - Wastewater treatment
Uncontrolled terms:Anaerobic ammonium oxidation - Anaerobic baffled reactor - Flocculent sludge - Membrane bio reactor (MBR) - Quick start-up - Relationship analysis - Removal capacity - Sludge morphology
Classification code:452.4  Industrial Wastes Treatment and Disposal - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 2.00e+01%
DOI:10.13227/j.hjkx.201609051

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.v

<RECORD 1>

Accession number:20172603860960
Title:Day-Night Variation and Source Apportionment of Carbonaceous Aerosols in PM<inf>10</inf>During Spring and Summer of Lanzhou
Authors:Ma, Li (1, 3); Yu, Ye (1, 2); Wang, Bo (1); Zhao, Su-Ping (1); Li, Gang (4)
Author affiliation:(1) Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; (2) Pingliang Land Surface Process &amp; Severe Weather Research Station, Chinese Academy of Sciences, Pingliang; 744015, China; (3) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Institute of Arid Meteorology, China Meteorological Administration, Lanzhou; 730020, China
Corresponding author:Yu, Ye(yyu@lzb.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1289-1297
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The purpose of this study was to investigate the characteristics and source apportionment of carbonaceous aerosols in PM<inf>10</inf>for the daytime and nighttime during spring and summer over Lanzhou. The samples were collected from 1 April 2015 to 30 August 2015, daytime samples were collected during 08:00 to 20:00 and nighttime samples during 20:00 to 08:00 on the next day, and organic carbon (OC) and elemental carbon (EC) concentrations were measured. The results showed that PM<inf>10</inf>, OC and EC concentrations were (136.0&plusmn;84.3), (12.4&plusmn;3.2), (2.3&plusmn;0.7) &mu;g&middot;m<sup>-3</sup>during the daytime, and (196.0&plusmn;109.2), (16.0&plusmn;5.3), (5.0&plusmn;2.1) &mu;g&middot;m<sup>-3</sup>during the nighttime. The mass concentrations of PM<inf>10</inf>, OC and EC in the nighttime were higher than those during the daytime. The ratios of secondary organic carbon to total organic carbon were higher in the daytime than nighttime, suggesting that the secondary organic carbon pollution was more serious in the daytime. In sand-dust weather, the concentrations of PM<inf>10</inf>and OC were higher than those in non-dust weather, while the EC concentration was close to that in non-dust weather. Secondary organic carbon and total carbon aerosols were higher in sand-dust weather, but the contribution to the PM<inf>10</inf>was relatively low. In addition, principal component analysis on the eight carbon fractions of non-dust weather indicated that coal combustion, vehicle exhaust and biomass burning were the major sources for carbonaceous aerosol during the daytime, while coal combustion, dust, diesel exhaust and biomass burning played important roles in the nighttime. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Organic carbon
Controlled terms:Aerosols - Carbon - Coal combustion - Coal dust - Dust - Particles (particulate matter) - Principal component analysis
Uncontrolled terms:Biomass-burning - Carbonaceous aerosol - Elemental carbon - Mass concentration - Secondary organic carbon - Source apportionment - Total Organic Carbon - Vehicle exhausts
Classification code:451.1  Air Pollution Sources - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 804  Chemical Products Generally - 804.1  Organic Compounds - 922.2  Mathematical Statistics - 951  Materials Science
DOI:10.13227/j.hjkx.201608156

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 2>

Accession number:20172603861005
Title:Forms Distribution and Ecotoxicity of Three Forms of Sulfonamides in Root-Soil Interface of Maize
Authors:Jin, Cai-Xia (1); Si, Xiao-Wei (1, 2); Wang, Wan-Feng (1); Wang, Chun-Feng (1); Wang, Zi-Ying (1); Zhang, Qin-Wen (1); Wang, Wan (2)
Author affiliation:(1) Henan Key Laboratory of Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang; 453007, China; (2) Judicial Authentication Center of Ecological Environmental Damage of Henan, Zhengzhou; 450011, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1683-1688
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Forms distribution and ecotoxicity of sulfonamides in root-soil interface of maize were studied by chemical analysis and luminescent bacteria toxicity assay. The results indicated that the water soluble residues were the main form in rhizosperic soils, and the organic solvent extractable residues were the main form in far-rhizosperic soils. The three forms of sulfonamides showed relatively lower toxicity to luminescent bacteria with the relative inhibition rates less than 30%. The toxicity of water soluble residues was lower than that of the organic solvent extractable residues, and the bound residues showed the lowest toxicity to luminescent bacteria. The contents and relative inhibition rates of water soluble residues in rhizosperic soils were higher than those in far-rhizosperic soils, while the contents and relative inhibition rates of organic solvent extractable and bound residues in rhizosperic soils were lower than those in far-rhizosperic soils. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Toxicity
Controlled terms:Amides - Bacteria - Chemical analysis - Forming - Luminescence - Organic solvents - Soils - Solvents - Sulfur compounds
Uncontrolled terms:Bound residues - Ecotoxicity - Inhibition rate - Luminescent bacteria - Soil interfaces - Sulfonamides - Toxicity assays - Watersoluble
Classification code:461.7  Health Care - 483.1  Soils and Soil Mechanics - 741.1  Light/Optics - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds
Numerical data indexing:Percentage 3.00e+01%
DOI:10.13227/j.hjkx.201606036

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 3>

Accession number:20172603860973
Title:Effects of Coastal Organic Pollution on Bacterioplankton Community in Sanmen Bay
Authors:Dai, Wen-Fang (1, 2); Guo, Yong-Hao (1); Yu, Wei-Na (1, 2); Xiong, Jin-Bo (1, 2)
Author affiliation:(1) School of Marine Sciences, Ningbo University, Ningbo; 315211, China; (2) Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo; 315211, China
Corresponding author:Xiong, Jin-Bo(xiongjinbo@nbu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1414-1422
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Coastal organic pollution has become a serious problem, thus it is imperative to assess the potential effects on the marine environment. The microbes are generally the first responders to environmental perturbation, which may serve as biological indicators for pollution levels. In this study, we collected surface seawater samples from Sanmen Bay and adjacent Yushan Reserve. Using an Illumina sequencing based analysis of bacterial 16S rRNA gene, we explored the effect of organic pollution on the bacterioplankton community compositions (BCCs). The results showed that the organic pollution (A) was 4.57&plusmn;2.41 at Sanmen Bay, which was significantly higher (P&lt;0.001) than that in Yushan Reserve (0.43&plusmn;0.74). The bacterial diversity and community compositions differed significantly between the two locations. Specifically, the relative abundance of Actinobacteria, &alpha;-Proteobacteria, &beta;-Proteobacteria, SAR406 in Sanmen Bay was significantly higher than that in Yushan Reserve, while Bacteroidetes, Cyanobacteria, Planctomycetes exhibited an opposite change pattern. A multivariate regression tree analysis showed that the bacterial diversity was primarily affected by water pH, organic pollution and chlorophyll a levels, which respectively explained 27.7%, 15.6% and 6.7% variance in bacterial diversity. A redundancy analysis (RDA) revealed that the bacterioplankton community was significantly controlled by pH, salinity and organic pollution, which cumulatively explained 14.8% of the variation in BCCs. In addition, the geographic distance was significantly (P&lt;0.001) correlated with BCCs, accounting for 4.42% variance, which suggested that the spatial distribution of bacterioplankton community was non-random. Moreover, this study screened 23 sensitive bacterial families, whose relative abundances were significantly associated the organic pollution. For a given bacterial family, the change pattern of relative abundance was consistent with its known function, thus holding the potential for indicating organic pollution levels. To conclude, this study showed that the increasing coastal organic pollution had altered BCCs, and enriched the relative abundances of potential pathogens. Furthermore, the sensitive bio-indicators were screened for evaluating the increasing organic pollution level. &copy; 2017, Science Press. All right reserved.
Number of references:49
Main heading:Water pollution
Controlled terms:Marine pollution - Pollution - Redundancy - Regression analysis - RNA
Uncontrolled terms:Bio-indicative bacterial family - Community composition - Driving factors - Organic pollution - Redundancy analysis
Classification code:453  Water Pollution - 461.2  Biological Materials and Tissue Engineering - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.48e+01%, Percentage 1.56e+01%, Percentage 2.77e+01%, Percentage 4.42e+00%, Percentage 6.70e+00%
DOI:10.13227/j.hjkx.201610003

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 4>

Accession number:20172603860999
Title:N<inf>2</inf>O Consumption Ability of Submerged Paddy Soil and the Regulatory Mechanism
Authors:Wang, Ling (1, 2); Xing, Xiao-Yi (1, 2); Qin, Hong-Ling (1); Liu, Yi (1); Wei, Wen-Xue (1)
Author affiliation:(1) Taoyuan Station of Agro-Ecology Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China
Corresponding author:Wei, Wen-Xue(wenxuewei@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1633-1639
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A large number of researches showed that the N<inf>2</inf>O negative emissions from flooding paddy fields, peatlands and other wetlands ecosystem were frequent and considerable, which is of great significance on alleviating the greenhouse gas effect. However, there are few reports about the transformation and microbial mechanism of N<inf>2</inf>O between atmosphere and paddy soil. The slurry of surface paddy soil (0-5 cm) was incubated in laboratory conditions, and the effect of enhanced N<inf>2</inf>O concentrations in headspace on the N<inf>2</inf>O consumption capacity of submerged paddy soil and the response of nosZ gene abundance were explored. The results showed that, paddy soil under flooding and anaerobic conditions harbored very strong potential of N<inf>2</inf>O reduction along with a relatively high nosZ gene abundance (10<sup>8</sup>copies&middot;g<sup>-1</sup>dry soil at DNA level). Regression analysis presented the N<inf>2</inf>O concentrations in headspace were positively correlated (r<sup>2</sup>=1, P&lt;0.001) to the N<inf>2</inf>O consumption rates of paddy soil slurry, indicating the high N<inf>2</inf>O concentration could stimulate the N<inf>2</inf>O consumption power, to a very high rate of 4 567.99 &mu;g&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>. Meanwhile, there were no significant differences in the high abundance of nosZ gene among N<inf>2</inf>O treatments, demonstrating the nosZ gene abundance at DNA level might not be the main controller of N<inf>2</inf>O consumption ability in submerged paddy soil and further study on the key microbial factor is needed. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Underwater soils
Controlled terms:Floods - Gas emissions - Genes - Greenhouse effect - Greenhouse gases - Regression analysis - Soils - Wetlands
Uncontrolled terms:Anaerobic conditions - Consumption rates - Laboratory conditions - N2O reduction - NosZ - Paddy fields - Paddy soils - Regulatory mechanism
Classification code:451  Air Pollution - 451.1  Air Pollution Sources - 461.2  Biological Materials and Tissue Engineering - 483.1  Soils and Soil Mechanics - 922.2  Mathematical Statistics
Numerical data indexing:Size 0.00e+00m to 5.00e-02m
DOI:10.13227/j.hjkx.201609138

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 5>

Accession number:20172603860971
Title:Vertical Stratification Characteristics of Dissolved Oxygen and Phytoplankton in Thousand-Island Lake and Their Influencing Factors
Authors:Yu, Yan (1); Liu, De-Fu (2, 3); Yang, Zheng-Jian (2, 3); Zhang, Jia-Lei (2, 3); Xu, Ya-Qian (2); Liu, Jin-Gao (2); Yan, Guang-Han (1)
Author affiliation:(1) College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang; 443002, China; (2) College of Civil and Environmental Engineering, Hubei University of Technology, Wuhan; 430068, China; (3) Key Laboratory of Ecological Remediation of Lakes and Rivers and Algal Utilization of Hubei Province, Wuhan; 430068, China
Corresponding author:Yang, Zheng-Jian(656637841@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1393-1402
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:According to the data collected from the five monitoring sites in front of the dam in Thousand-island Lake in September 2015, the vertical distribution characteristics of dissolved oxygen (DO), water temperature, pH, turbidity, conductivity and phytoplankton were analyzed. The influencing factors of special stratification of DO and vertical distribution of phytoplankton were also discussed. The results showed that: (1) The vertical distribution of DO presented &ldquo;the surface is higher than the underlying&rdquo; mode. DO ranged from 1.95 mg&middot;L<sup>-1</sup>to 8.25 mg&middot;L<sup>-1</sup>and the average concentration was 5.10 mg&middot;L<sup>-1</sup>. Low-oxygen zones appeared between 12 m and 20 m and the minimum concentration was 1.95 mg&middot;L<sup>-1</sup>at 17 m. The concentration of DO maintained at a high level between 0 m and 12 m and the vertical variance was small. Sudden drop of DO occurred between 12 m and 20 m and there was an anoxic zone (&lt;4.0 mg&middot;L<sup>-1</sup>). The concentration of DO returned to normal level between 20 m and 38 m. Then it reduced under 38m as the water depth increased. The vertical distribution of pH showed the same trend with that of DO and their sudden change regions appeared in the same zone. (2) Vertical phytoplankton biomass displayed significant difference. The phytoplankton biomass of S1, S2 and S3 presented: mid-layer&gt;surface&gt;bottom. But S4, S5 presented: bottom&gt;surface&gt;mid-layer. In addition, the depth between 20 m and 30 m was the best for the growth of phytoplankton. (3) The correlation analysis showed that DO and water temperature in the thermocline were significantly correlative. The range and degree of low-oxygen zones in Thousand-island Lake was determined by physical processes like thermal stratification of water and direct or indirect effects of the plankton. Phytoplankton and DO, pH showed significant negative correlation. The phytoplankton was mainly influenced by turbulent mixing and DO stratification in the surface layer while it was mainly influenced by light intensity at the bottom. &copy; 2017, Science Press. All right reserved.
Number of references:51
Main heading:Dissolved oxygen
Controlled terms:Biochemical oxygen demand - Dissolution - Lakes - Oxygen - Phytoplankton - Temperature
Uncontrolled terms:Average concentration - Chemical factors - Correlation analysis - Negative correlation - Phytoplankton biomass - Vertical distributions - Vertical stratification - Water temperatures
Classification code:471  Marine Science and Oceanography - 641.1  Thermodynamics - 802.3  Chemical Operations - 804  Chemical Products Generally
Numerical data indexing:Mass_Density 1.95e-03kg/m3, Mass_Density 1.95e-03kg/m3 to 8.25e-03kg/m3, Mass_Density 5.10e-03kg/m3, Size 0.00e+00m to 1.20e+01m, Size 1.20e+01m to 2.00e+01m, Size 1.70e+01m, Size 2.00e+01m to 3.00e+01m, Size 2.00e+01m to 3.80e+01m, Size 3.80e+01m
DOI:10.13227/j.hjkx.201606085

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 6>

Accession number:20172603860968
Title:Hanfeng Pre-reservoir Commissioning Time Variation Feature of the Hydrology and Water Quality in Three Gorges Reservoir
Authors:Yang, Bing (1); He, Bing-Hui (1); Wang, De-Bao (1)
Author affiliation:(1) Key Laboratory of Eco-environments in the Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China
Corresponding author:He, Bing-Hui(hebinghui@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1366-1375
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Hanfeng Pre-reservoir is very rare in the world which is specially designed to reduce the impact of Fluctuating Zone, and it is formed in Hanfeng Lake of Three Gorges reservoir. The Hanfeng Pre-reservoir has many special hydrological characteristics and ecological environment features based on its unique &ldquo;pre-reservoir&rdquo; control mode, the wide seasonal wetland of Fluctuating Zone, the huge life pollution and agricultural pollution, and the pressure of huge city and excessive population. HanFeng Lake has a variety of morphological features such as lakes, rivers, and other backwater bay, for the effect of water level regulation in Three Gorges, since the successful commissioning of the Hanfeng Lake pre-dam system in 2015. The change of Hanfeng Lake hydrology and water quality during the commissioning was divided into four periods by combining Hydrological and Morphological Variation characteristics with Water quality indicators time clustering analysis: May to August as T1 (river period); January, March and November to December as T2 (lake period); February, April and September as T3 (water level fluctuation period); October as T4 (algal blooms period) in 2015. Principal component analysis and stepwise regression analysis showed that Eutrophication of Hanfeng Lake was dominated by different dominant components at different times and the water quality index factor which has a significant effect on the Chl-a was also different. Cumulative contribution rates of principal components were 82.93%, 77.61%, 78.32%, 88.40% for each period, respectively. The main water quality indicators of T1 (river period) were DP, TP, SD, pH and the significant influencing index of Chl-a was PC<inf>2</inf>, so Chl-a was mainly affected by water nitrogen content. The main water quality indicators of T2 (lake period) were TN, DN, DP, TP, NO<inf>3</inf><sup>-</sup>-N and the significant influencing index of Chl-a was PC<inf>1</inf>, so Chl-a was mainly affected by water eutrophication including nitrogen and phosphorus nutrient status. The main water quality indicators of T3 (water level fluctuation period) were SD, NH<inf>4</inf><sup>+</sup>-N, DN, T and the significant influencing index of Chl-a was PC<inf>3</inf>. so Chl-a was mainly affected by water level fluctuation. The main water quality indicators of T4 (algal blooms period) were TN, DN, DO, NH<inf>4</inf><sup>+</sup>-N, pH, permanganate index, H, NO<inf>3</inf><sup>-</sup>-N and the significant influencing index of Chl-a was PC<inf>3</inf>. so Chl-a was mainly affected by flow rate and hydrodynamic conditions. As mentioned in the review, the frequent and significant water level changes during the commissioning of Hanfeng Lake were the important factors influencing the change of hydrological and water quality characteristics. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Reservoirs (water)
Controlled terms:Eutrophication - Hydrology - Lake pollution - Lakes - Multivariant analysis - Nitrogen - Pollution - Pollution control - Principal component analysis - Quality control  - Regression analysis - River pollution - Rivers - Water levels - Water quality - Water resources
Uncontrolled terms:Commissioning - Hydrological characteristics - Multivariate statistical analysis - Nitrogen and phosphorus - Stepwise regression analysis - Variation characteristics - Water quality characteristics - Water quality indicators
Classification code:441.2  Reservoirs - 444  Water Resources - 445.2  Water Analysis - 453  Water Pollution - 804  Chemical Products Generally - 913.3  Quality Assurance and Control - 922  Statistical Methods - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 7.76e+01%, Percentage 7.83e+01%, Percentage 8.29e+01%, Percentage 8.84e+01%
DOI:10.13227/j.hjkx.201607173

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 7>

Accession number:20172603860994
Title:Pollution Characteristics and Source Analysis of Polycyclic Aromatic Hydrocarbons in Agricultural Soils from Shandong
Authors:Ge, Wei (1); Cheng, Qi-Qi (2); Chai, Chao (2); Zeng, Lu-Sheng (2); Wu, Juan (2); Chen, Qing-Hua (2); Zhu, Xiang-Wei (2); Ma, Dong (2)
Author affiliation:(1) College of Life Science, Qingdao Agricultural University, Qingdao; 266109, China; (2) College of Resources and Environment, Qingdao Agricultural University, Qingdao; 266109, China
Corresponding author:Chai, Chao(chaichao1999@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1587-1596
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants that originate mainly from anthropogenic sources. PAHs have elicited much concern because they exhibit strong toxic, carcinogenic, and mutagenic properties. Agricultural soil is at risk of PAH contamination mainly caused by atmospheric depositions, wastewater irrigation, or organic substances and biowaste applied as fertilizers. The surface agricultural soils were collected from Shandong in July 2015, and measured for 16 US EPA priority PAHs using high performance liquid chromatography with UV and fluorescence detector. The content and composition of PAHs were analyzed. The differences of PAHs between soils from the field for growing crops and from vegetable greenhouses, and between soils from point sources and from non-point sources were compared. The sources of PAHs were determined with methods of ratio between PAHs and positive matrix factorization (PMF), and the risks of PAHs were assessed. The results showed that the total content of 16 PAHs (&sum;16PAHs) ranged from 111.5 ng&middot;g<sup>-1</sup>to 2 744.1 ng&middot;g<sup>-1</sup>, with the mean of 556.3 ng&middot;g<sup>-1</sup>. The content of 3-ring PAHs was relatively high, with the mean of 201.5 ng&middot;g<sup>-1</sup>; while the contents of 2-ring and 6-ring PAHs were relatively low, with the mean of 39.3 ng&middot;g<sup>-1</sup>and 43.4 ng&middot;g<sup>-1</sup>, respectively. According to the contamination classification in Poland, 71% of the samples in Shangdong were weakly contaminated. Compared with other areas in China, the content of PAHs in the agricultural soils in Shandong was in the middle range. Acenaphthene, fluorine, and fluoranthene were the major PAH compounds, accounting for more than 10% of the total PAHs; while the contribution of indeno (1,2,3-cd) pyrene was low. The content of &sum;16PAHs and contribution of 7 carcinogenic PAHs were significantly higher in soils polluted by point sources than those in soils from non-point sources. Moreover, the contribution of PAHs with 2-3 rings was significantly higher in soils from non-point sources, while the contribution of PAHs with 4-6 rings was significantly higher in soils polluted by point sources. There was no significant difference in soils from vegetable greenhouses and from adjacent field soils, and the contribution of PAHs with 3-4 rings was high. The PAH isomer pair ratios of Ant/(Ant+Phe), Flu/(Flu+Pyr), BaA/(BaA+Chr), and InP/(InP+BP) were utilized as molecular indices to elucidate the possible PAH sources, and the results suggested that the PAHs in the soils were mainly from combustion. To quantitatively assess the contribution of various sources to PAH contamination, PMF was used to analyze the sources. The sources of PAHs were combustion of coal biomass, oil combustion from traffic, coking, and petroleum pollution, with contribution of 42.7%, 19.3%, 22.8% and 15.2%, respectively. Toxic equivalency factors were used to evaluate PAH contamination in the soils, and the carcinogenicity of other PAHs relative to BaP was quantified to estimate the BaP-equivalent concentration (TEQ<inf>BaP</inf>). The TEQ<inf>BaP</inf>of 16 PAHs (&sum;16TEQ<inf>Bap</inf>) in soils from non-point sources and vegetable greenhouses was 31.69 and 44.47 ng&middot;g<sup>-1</sup>, respectively, which were below the safe value in Canadian soil quality guidelines. However, the &sum;16TEQ<inf>Bap</inf>in some field soils from point sources exceeded the safe value, indicating that there were potential risks in the soils from point sources in Shandong. &copy; 2017, Science Press. All right reserved.
Number of references:46
Main heading:Soil pollution
Controlled terms:Agriculture - Aromatic compounds - Aromatic hydrocarbons - Aromatization - Coal combustion - Coking - Combustion - Contamination - Environmental Protection Agency - Factorization  - Fluorescence - Greenhouses - High performance liquid chromatography - Hydrocarbons - Liquid chromatography - Meteorological problems - Pollution - Polycyclic aromatic hydrocarbons - Risk assessment - Risks  - Soils - Vegetables
Uncontrolled terms:Atmospheric depositions - Environmental contaminant - Equivalent concentrations - Polycyclic aromatic hydrocarbons (PAHS) - Positive Matrix Factorization - Shandong - Source analysis - Toxic equivalency factors
Classification code:443.1  Atmospheric Properties - 454.2  Environmental Impact and Protection - 483.1  Soils and Soil Mechanics - 524  Solid Fuels - 741.1  Light/Optics - 802.2  Chemical Reactions - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control - 914.1  Accidents and Accident Prevention - 921  Mathematics
Numerical data indexing:Percentage 1.00e+01%, Percentage 1.52e+01%, Percentage 1.93e+01%, Percentage 2.28e+01%, Percentage 4.27e+01%, Percentage 7.10e+01%
DOI:10.13227/j.hjkx.201608199

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 8>

Accession number:20172703864524
Title:Tempo-spatial Variations and Influential Factors of Carbon Dioxide Emissions from the Geheyan Reservoir over the Qingjiang River Basin, China
Authors:Zhao, Deng-Zhong (1); Tan, De-Bao (1); Li, Chong (2); Shen, Shao-Hong (1)
Author affiliation:(1) Changjiang River Scientific Research Institute (CRSRI), Changjiang Water Resources Commission, Wuhan; 430010, China; (2) China Three Gorges Corporation, Beijing; 100038, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:954-963
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Greenhouse gas emission from aquatic ecosystem will affect climate change on the regional and global scale. So large river interception project which affects the carbon cycle model and greenhouse gas emission from aquatic ecosystem has provoked more and more attentions in recent years. In order to understand and evaluate the effects of typical hydropower project construction on the aquatic ecosystem and carbon cycle, the Geheyan Reservoir, a typical river interception project, was selected as a typical case in this paper for measuring carbon dioxide fluxes from interface between water and atmosphere from March, 2015 to February, 2016. The integration of the online gas analyzer and floating box was used to obtain carbon dioxide fluxes from interface between water and atmosphere. Data was obtained over the before dam, upstream, tributary, drawdown area and bay area respectively for understanding the spatial Heterogeneity of carbon dioxide fluxes. Data analysis showed that yearly mean fluxes of carbon dioxide from the Geheyan Reservoir was (55.6918&plusmn;66.3329) mg&middot;(m<sup>2</sup>&middot;h)<sup>-1</sup>during measurement, which indicated that the temporal distribution was higher in winter and lower in other seasons and the spatial variation was higher in typical bay and lower before dam as well as drawdown zone over the reservoir. Moreover, the seasonal variation of carbon dioxide fluxes from the interface between water and atmosphere was very stable at Yuxiakou measurement points as a typical background area of the reservoir, which was unexpectedly higher than those before dam and drawdown zone in the most months during measurement. The results from data analysis also indicated that the spatial and temporal variation of carbon dioxide fluxes from the Geheyan Reservoir was affected by water quality parameters such as dissolved oxygen, chlorophyll, pH, water temperature and conductivity and carbon in water, but the relationship between carbon dioxide fluxes and other parameter was very different within each season and impound period. So the results above will provide more supports for understanding the import pathway and transfer of aquatic carbon cycle caused by large river interception project in China. &copy; 2017, Science Press. All right reserved.
Number of references:36
Main heading:Phase interfaces
Controlled terms:Aquatic ecosystems - Biochemical oxygen demand - Carbon dioxide - Climate change - Data handling - Dissolved oxygen - Ecology - Ecosystems - Gas emissions - Global warming  - Greenhouse gases - Information analysis - Quality control - Reservoirs (water) - Rivers - Water levels - Water quality - Watersheds
Uncontrolled terms:Carbon cycles - Carbon dioxide emissions - Carbon dioxide flux - Qingjiang river basins - Spatial and temporal distribution - Spatial and temporal variation - Temporal distribution - Water quality parameters
Classification code:441.2  Reservoirs - 443.1  Atmospheric Properties - 444.1  Surface Water - 445.2  Water Analysis - 451.1  Air Pollution Sources - 454.3  Ecology and Ecosystems - 723.2  Data Processing and Image Processing - 801.4  Physical Chemistry - 804.2  Inorganic Compounds - 903.1  Information Sources and Analysis - 913.3  Quality Assurance and Control
DOI:10.13227/j.hjkx.201607086

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 9>

Accession number:20172703864516
Title:Online Source Analysis of Particulate Matter (PM<inf>2.5</inf>) in a Heavy Pollution Process of Shijiazhuang City During Heating Period in 2015
Authors:Lu, Na (1); Li, Zhi-Guo (1); Zhou, Jing-Bo (1); Zhao, Xin (1); Yang, Li-Li (1); Feng, Yuan (1); Jin, Wei (1)
Author affiliation:(1) Shijiazhuang Environmental Monitoring Center, Shijiazhuang; 050022, China
Corresponding author:Jin, Wei(jiwei65815@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:884-893
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In recent years, more and more public attention has been paid to the problem of air pollution during the heating period in North China. This article took a heavy pollution process of Shijiazhuang district from Nov. 24th to Dec. 4th in 2015 as an example, and analyzed comprehensively the source apportionment in different periods, size distribution of the PM<inf>2.5</inf>from each source in different periods, the characteristics of mass spectra of the main emission sources and the meteorological conditions with the method of real-time online source analysis. It turned out: the main sources of pollutants were coal combustions, industrial discharges, vehicle exhausts and secondary inorganic reactions. With the help of meteorological condition of low pressure and low wind speed, the PM<inf>2.5</inf>mainly produced by coal combustions and industrial discharges accumulated heavily and went through the second stage conversion, leading to this heavy air pollution. The main particulate matters from coal combustions were the mixed carbons; the main particulate matters from industrial discharges were metals; the main particulate matters from vehicle exhausts were elemental carbon and manganese metal; the main particulate matters from pure secondary inorganic sources were secondary inorganic ions; the main particulate matters from dust pollution were aluminum, calcium, iron and silicate minerals; the main particulate matters from biomass fuel combustions were levoglucosan; the feature signal from restaurant discharges was organic acid. Different from the distribution before and after the heavy pollution period, the particulate matters from the 8 pollution sources presented even distribution during the heavy pollution period. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Air pollution
Controlled terms:Carbon - Coal - Coal combustion - Coal dust - Fuels - Mass spectrometers - Mass spectrometry - Metal analysis - Organic minerals - Pollution  - Silicate minerals - Silicates - Size distribution
Uncontrolled terms:Industrial discharges - Inorganic reactions - Mass spectra - Meteorological condition - Online sources - Particulate Matter - Shijiazhuang City - Source apportionment
Classification code:451  Air Pollution - 482.2  Minerals - 524  Solid Fuels - 801  Chemistry - 804  Chemical Products Generally - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201605058

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 10>

Accession number:20172703864529
Title:Speciation and Ecological Risk of Heavy Metals in Surface Sediments from Jiulong River
Authors:Lin, Cheng-Qi (1); Hu, Gong-Ren (1, 2); Yu, Rui-Lian (1); Han, Lu (1)
Author affiliation:(1) College of Chemical Engineering, Huaqiao University, Xiamen; 361021, China; (2) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China
Corresponding author:Yu, Rui-Lian(ruiliany@hqu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1002-1009
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Speciation characteristics of fifteen heavy metals in seventeen surface sediments from Jiulong River was analyzed using the modified BCR protocol and dilute HNO<inf>3</inf>method, respectively. The results of the modified BCR protocol showed that most of the elements (Fe, Ni, V, Tl, Ba, Sb, Ga, Cr and Sr) existed mainly in residual fractions, and extractable fraction was dominant for Mn (83.8%), followed by Cd, Pb, Zn, Co and Cu (80.0%, 75.5%, 74.3%, 70.8% and 57.7%). The results of dilute HNO<inf>3</inf>method showed that the proportions of the dilute HNO<inf>3</inf>-extractable fractions of Pb, Mn, Cd, Co, Zn and Cu were higher (70.4%, 65.4%, 58.7%, 48.4%, 44.5% and 45.5%). The assessment results of RSP (ratio of secondary phase to primary phase) indicated that Pb, Mn, Cd, Co, Zn and Cu in surface sediments of Jiulong River had higher ecological risks. Both extraction methods had merits and demerits respectively. In general, the dilute HNO<inf>3</inf>method is enough to analyze the bioavailability and ecological risk of heavy metals in sediments. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:River pollution
Controlled terms:Biochemistry - Ecology - Heavy metals - Lead - Manganese - Risk assessment - Rivers - Sediments - Strontium - Surficial sediments  - Zinc
Uncontrolled terms:Bioavailability - Dilute HNO<inf>3</inf>method - Ecological risks - Extraction method - Jiulong River - Residual fraction - Secondary phase - Surface sediments
Classification code:453  Water Pollution - 454.3  Ecology and Ecosystems - 483  Soil Mechanics and Foundations - 531  Metallurgy and Metallography - 543.2  Manganese and Alloys - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 549.2  Alkaline Earth Metals - 801.2  Biochemistry - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 4.45e+01%, Percentage 4.55e+01%, Percentage 4.84e+01%, Percentage 5.77e+01%, Percentage 5.87e+01%, Percentage 6.54e+01%, Percentage 7.04e+01%, Percentage 7.08e+01%, Percentage 7.43e+01%, Percentage 7.55e+01%, Percentage 8.00e+01%, Percentage 8.38e+01%
DOI:10.13227/j.hjkx.201607087

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 11>

Accession number:20171003409530
Title:Characteristics of methane emission from urban traffic in Nanjing
Authors:Zhang, Xue (1, 2); Hu, Ning (1, 2); Liu, Shou-Dong (1, 2); Wang, Shu-Min (1, 2); Gao, Yun-Qiu (1, 2); Zhao, Jia-Yu (1, 2); Zhang, Zhen (1, 2); Hu, Yong-Bo (1, 2); Lee, Xu-Hui (1, 2); Zhang, Guo-Jun (1, 2)
Author affiliation:(1) Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China; (2) Collaborative Innovation of Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China
Corresponding author:Liu, Shou-Dong(lsd@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:469-475
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Urban traffic is an important source of greenhouse gases such as CH<inf>4</inf>. The observations on CH<inf>4</inf>are the basis for quantitative analysis of urban carbon emissions. Taken into consideration the weekly and daily changing characteristics of urban traffic, we conducted experiments to analyze the features of traffic CH<inf>4</inf>emission and its influential factors. The experiments were conducted on 3 main roads in Nanjing on Oct. 17, 18, 20, 23, 2014 with 5 periods of observation per day, and in Nanjing Yangtze River tunnel in the morning and at night of Sep.11 2014. The results showed that: (1)The average concentration of CH<inf>4</inf>on the urban main road of Nanjing city was greater than that of the background atmosphere. Affected by traffic conditions, the spatial difference of &Delta;CH<inf>4</inf>concentration was significant on three typical main roads. &Delta;CH<inf>4</inf>concentration's diurnal variation showed inverted &ldquo;W&rdquo; type, and its peak appeared in the morning and evening rush hours. (2) Due to the &ldquo;piston wind&rdquo; in the tunnel, the CH<inf>4</inf>concentration in Nanjing Yangtze River tunnel gradually increased from the inlet to the outlet and the difference of concentration between the inlet and the outlet was 0.21&times;10<sup>-6</sup>-0.38&times;10<sup>-6</sup>. (3)There was a good linear correlation between CH<inf>4</inf>concentration and CO<inf>2</inf>concentration. The atmospheric &Delta;CH<inf>4</inf>&#8758;&Delta;CO<inf>2</inf>value of urban main road in Nanjing was 0.009 1 and the atmospheric &Delta;CH<inf>4</inf>&#8758;&Delta;CO<inf>2</inf>value of Nanjing Yangtze River Tunnel was 0.000 47-0.001 4. (4)Traffic volume and the proportion of natural gas vehicles were the main factors influencing atmospheric &Delta;CH<inf>4</inf>concentration and &Delta;CH<inf>4</inf>&#8758;&Delta;CO<inf>2</inf>. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Transportation
Controlled terms:Carbon - Carbon dioxide - Greenhouse gases - Natural gas - Natural gas vehicles - Rivers - Roads and streets - Tunnels
Uncontrolled terms:Average concentration - Diurnal variation - Influential factors - Linear correlation - Main roads - Spatial differences - Traffic conditions - Urban traffic
Classification code:401.2  Tunnels and Tunneling - 406.2  Roads and Streets - 432  Highway Transportation - 451.1  Air Pollution Sources - 522  Gas Fuels - 804  Chemical Products Generally - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201606090

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 12>

Accession number:20171003409558
Title:Concentration, sources and ecological risks of PAHs of different land use types in Shenfu New City
Authors:Wang, Jing (1, 2); Liu, Ming-Li (1, 2); Zhang, Shi-Chao (1, 2); Lu, Yin-Tao (1, 2); Yao, Hong (1, 2)
Author affiliation:(1) School of Civil Engineering, Beijing Jiaotong University, Beijing; 100044, China; (2) Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing; 100044, China
Corresponding author:Yao, Hong(yaohongts@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:703-710
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The concentration level of polycyclic aromatic hydrocarbon (PAHs) in topsoil from Shenfu New City in urbanization was studied. 54 topsoil samples were collected from Shenfu New City and 4 different land uses (urban land, rural land, forest land, cultivated land) were included. The concentration of PAHs in different land uses was analyzed, the sources of soil PAHs were analyzed by using diagnostic ratios and principal component analysis, and the ecological risks were calculated using toxic equivalency concentrations of BaP and the incremental lifetime cancer risk(ILCR)model. Results indicated that the concentrations of &sum;PAHs in urban land, cultivated land, rural land and forest land were in the range of 184-18 276, 230-14 102, 151-3 205, 303-2 980 &mu;g&middot;kg<sup>-1</sup>, respectively. Four land uses had similar sources, the main sources were coal combustion and traffic emission. According to the calculation of ecological risks, there were potential health risks for residents in Shenfu New City, especially urban land, meanwhile, residents were easily exposed to soil PAHs through dermal contact. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Polycyclic aromatic hydrocarbons
Controlled terms:Aromatic compounds - Aromatic hydrocarbons - Coal combustion - Ecology - Elementary particle sources - Forestry - Health risks - Hydrocarbons - Land use - Principal component analysis  - Risk assessment - Soils
Uncontrolled terms:Concentration levels - Diagnostic ratios - Different land use types - Ecological risks - Polycyclic aromatic hydrocarbons (PAHS) - Potential health risks - Toxic equivalency - Traffic emissions
Classification code:403  Urban and Regional Planning and Development - 454.3  Ecology and Ecosystems - 461.7  Health Care - 483.1  Soils and Soil Mechanics - 521  Fuel Combustion and Flame Research - 524  Solid Fuels - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201607096

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 13>

Accession number:20171003409555
Title:Effects of free ammonia regulation on the performance of high solid anaerobic digesters with dewatered sludge
Authors:Dai, Xiao-Hu (1); He, Jin (1); Yan, Han (1); Li, Ning (1); Ding, Yue-Ling (1); Dong, Bin (1); Dai, Ling-Ling (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:Li, Ning(lining@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:679-687
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:High free ammonia nitrogen (FAN) is regarded as a main factor that inhibits biogas production in high solid anaerobic digestion systems with dewatered sludge. Two mesophilic semi-continuous anaerobic digesters fed with dewatered sludge (input total solids=15%) were operated and their performance under different FAN concentrations by two regulation methods including pH reduction and total ammonia nitrogen (TAN) promotion were investigated. Results showed that when FAN was elevated from (400&plusmn;174) mg&middot;L<sup>-1</sup>to (526&plusmn;25) mg&middot;L<sup>-1</sup>with the increase of TAN, the daily biogas yield declined from (11.9&plusmn;0.3) L&middot;d<sup>-1</sup>to (10.3&plusmn;0.2) L&middot;d<sup>-1</sup>. Meanwhile, volatile solids (VS) reduction rate decreased by 33.7%. When FAN dropped from (330&plusmn;99) mg&middot;L<sup>-1</sup>to (47&plusmn;13) mg&middot;L<sup>-1</sup>due to pH reduction, daily biogas yield declined from (14.4&plusmn;1.1) L&middot;d<sup>-1</sup>to (10.8&plusmn;0.3) L&middot;d<sup>-1</sup>and VS reduction rate decreased by 26.9%. The system performance was not enhanced with the reduction of FAN. With the stop of pH regulation, FAN gradually raised again to 300 mg&middot;L<sup>-1</sup>and digester performance recovered to the same as the situation before regulation. The result suggested that inhibition occurred during pH reduction. By 16S rRNA pyrosequencing analysis on bacterial and archaeal diversity and quantitative PCR analysis aiming at methanogens, it was found that bacterial community structure both changed obviously with obvious performance decline in the two digesters. Excessive FAN (&gt;500 mg&middot;L<sup>-1</sup>) could change the main bacteria species which degrade protein from Tepidimicrobium and Proteiniborus to Anaerobranca. On the other hand, some carbohydrate and protein degrading bacteria were also inhibited by pH reduction for FAN control, leading to the decline of hydrolysis rates of organic matters. As a result, the shortage of substrate supply for the methanogens weakened the biogas production of the digestion system. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Anaerobic digestion
Controlled terms:Ammonia - Bacteria - Biodegradation - Biogas - Dewatering - Digestive system - Methanogens - Nitrogen - Polymerase chain reaction - Proteins  - Pulp digesters - RNA - Sludge digestion - Substrates
Uncontrolled terms:Ammonia inhibition - Anaerobic digester - Bacterial community structure - Biogas production - Degrading bacteria - Free ammonia - High-solids - Total ammonia nitrogens
Classification code:452.2  Sewage Treatment - 461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 522  Gas Fuels - 801.2  Biochemistry - 802.3  Chemical Operations - 804  Chemical Products Generally - 811.1.2  Papermaking Equipment
Numerical data indexing:Mass_Density 3.00e-01kg/m3, Percentage 2.69e+01%, Percentage 3.37e+01%
DOI:10.13227/j.hjkx.201607137

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 14>

Accession number:20171003409569
Title:Isolation and identification of a chlorobenzene-degrading bacterium and its degradation characteristics
Authors:Ye, Jie-Xu (1); Lin, Tong-Hui (1); Luo, Yu-Hao (1); Chen, Dong-Zhi (1); Chen, Jian-Meng (1)
Author affiliation:(1) College of Environment, Zhejiang University of Technology, Hangzhou; 310032, China
Corresponding author:Chen, Jian-Meng(jchen@zjut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:802-808
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A bacterium strain LW26 which could utilize chlorobenzene (CB) as sole carbon and energy source was isolated from a biotrickling filter reactor treating CB-contaminated off-gas. Based on its morphological and physiological characteristics, as well as the analysis of 16S rRNA gene sequence and Biolog test, the strain LW26 was identified as Delftia tsuruhatensis. To our best knowledge, it is the first time that the strain Delftia tsuruhatensis was applied for CB purification. In this study, the effects of temperature, pH, initial CB concentration and Cl<sup>-</sup>concentration on the biodegradation were investigated. The results showed that the optimal temperature and pH for CB biodegradation were 25&#8451; and 7.0, respectively; the maximum CB tolerated concentration for LW26 was as high as 500 mg&middot;L<sup>-1</sup>; when the concentration of Cl<sup>-</sup>was above 0.14 mol&middot;L<sup>-1</sup>, the CB degradation was significantly restrained. The degrading process of the strain LW26 followed the Haldane kinetic model and the maximum specific growth rate and the maximum specific degradation rate were 0.42 h<sup>-1</sup>and 2.53 h<sup>-1</sup>, respectively.GC-MS analysis of the metabolites revealed that CB was firstly converted to o-chlorophenol by strain LW26. Combined with the activity of catechol dioxygenase, it can be speculated that CB was finally mineralized to CO<inf>2</inf>, or converted to cell biomass after processes of ortho cleavage, dechlorination and oxidation. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Biodegradation
Controlled terms:Bacteria - Biofilters - Carbon - Carbon dioxide - Dechlorination - Degradation - Enzyme kinetics - Metabolites - Phenols - RNA  - Temperature
Uncontrolled terms:Chlorobenzene - Dechlorination and oxidations - Degradation characteristics - Delftia tsuruhatensis - Effects of temperature - Isolation and identification - Maximum specific growth rates - Physiological characteristics
Classification code:461.2  Biological Materials and Tissue Engineering - 461.8  Biotechnology - 641.1  Thermodynamics - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Molar_Concentration 1.40e+02mol/m3
DOI:10.13227/j.hjkx.201607198

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 15>

Accession number:20171003409537
Title:Temporal and spatial variations of dissolved inorganic carbon and its stable isotopic composition in the surface stream of karst groundwater recharge
Authors:Li, Li (1, 2); Pu, Jun-Bing (1); Li, Jian-Hong (1); Zhang, Tao (1, 2)
Author affiliation:(1) Key Laboratory of Karst Dynamics, Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin; 541004, China; (2) School of Geographical Sciences, Southwest University, Chongqing; 400715, China
Corresponding author:Li, Jian-Hong(jianhongli1988@karst.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:527-534
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Stable carbon isotope of dissolved inorganic carbon (&delta;<sup>13</sup>C<inf>DIC</inf>), which is mainly constituted by HCO<inf>3</inf><sup>-</sup>in karst water, is widely used to trace the different sources and influential factors of dissolved inorganic carbon (DIC). In order to understand the distribution of DIC and &delta;<sup>13</sup>C<inf>DIC</inf>in subtropical karst area, this paper researched the water chemistry and &delta;<sup>13</sup>C<inf>DIC</inf>in a karst surface stream in detail, which is fed by Guancun subterranean stream in Liuzhou City, Guangxi Province, in the southwest of China. The results showed that the contents of DIC in subterranean stream outlet (G1 site) ranged from 4.60 to 4.90 mmol&middot;L<sup>-1</sup>with an average of 4.73 mmol&middot;L<sup>-1</sup>in dry season, and from 2.80 to 4.70 mmol&middot;L<sup>-1</sup>with an average of 4.23 mmol&middot;L<sup>-1</sup>in rainy season. The contents of DIC in 1.35 km downstream site (G2 site) ranged from 4.30 to 4.90 mmol&middot;L<sup>-1</sup>with an average of 4.56 mmol&middot;L<sup>-1</sup>in dry season, and from 3.00 to 4.70 mmol&middot;L<sup>-1</sup>with an average of 4.20 mmol&middot;L<sup>-1</sup>in rainy season. The &delta;<sup>13</sup>C<inf>DIC</inf>of subterranean stream outlet (G1 site) varied from -12.8&permil; to -11.53&permil; with an average of -12.22&permil; in dry season, and from -13.12&permil; to -11.01&permil; with an average of -12.28&permil; in rainy season. The &delta;<sup>13</sup>C<inf>DIC</inf>of stream downstream site (G2 site) ranged from -11.71&permil; to -9.55&permil; with an average of -10.73&permil; in dry season, and ranged from -12.18&permil; to -9.85&permil; with an average of -11.10&permil; in rainy season. The contents of DIC of G1 site were higher than those of G2 site. The DIC contents in dry season in both G1 and G2 site were higher than those in rainy season. The values of &delta;<sup>13</sup>C<inf>DIC</inf>of G1 and G2 site in dry season were more positive than those in rainy season. The &delta;<sup>13</sup>C<inf>DIC</inf>value of G1 site was more negative than that of G2 site. The main sources of DIC in underground river and surface stream were soil CO<inf>2</inf>and carbonate dissolution. However, the differences of DIC and &delta;<sup>13</sup>C<inf>DIC</inf>between G1 and G2 site showed that CO<inf>2</inf>degassing and photosynthesis of aquatic plants had significant influence on water DIC and &delta;<sup>13</sup>C<inf>DIC</inf>value. This study is helpful to understand the dynamic change and distribution of DIC and &delta;<sup>13</sup>C<inf>DIC</inf>in karst surface stream. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Rivers
Controlled terms:Carbon - Carbon dioxide - Dissolution - Drought - Groundwater - Isotopes - Landforms
Uncontrolled terms:Dissolved inorganic carbon - Guangxi - Influential factors - Karst surface - Stable carbon isotopes - Stable isotopic compositions - Temporal and spatial variation - Underground rivers
Classification code:444  Water Resources - 444.2  Groundwater - 481.1  Geology - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Molar_Concentration 2.80e+00mol/m3 to 4.70e+00mol/m3, Molar_Concentration 3.00e+00mol/m3 to 4.70e+00mol/m3, Molar_Concentration 4.20e+00mol/m3, Molar_Concentration 4.23e+00mol/m3, Molar_Concentration 4.30e+00mol/m3 to 4.90e+00mol/m3, Molar_Concentration 4.56e+00mol/m3, Molar_Concentration 4.60e+00mol/m3 to 4.90e+00mol/m3, Molar_Concentration 4.73e+00mol/m3, Size 1.35e+03m
DOI:10.13227/j.hjkx.201607171

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 16>

Accession number:20171003416434
Title:Influencing mechanism and spatio-temporal pattern of stomatal ozone flux of winter wheat under ozone pollution
Authors:Zhao, Hui (1, 2); Zheng, You-Fei (1, 2, 3); Cao, Jia-Chen (3); Xu, Jing-Xin (1, 2); Huang, Ji-Qing (1, 2); Yuan, Yue (3)
Author affiliation:(1) Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) School of Atmospheric Physics and Environment, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China; (3) School of Environmental Science and Engineering, Nanjing University of Information Science &amp; Technology, Nanjing; 210044, China
Corresponding author:Zheng, You-Fei(zhengyf@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:412-422
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:As one of the main atmospheric pollutants over surface layer, researches on the increasing surface ozone concentration and its impact on main crops have become the focus of every government and the public. In this paper, based on the observations in Nanjing using the main local cultivars in China's major winter wheat producing areas, it was expected to obtain the data including ozone concentration, meteorological data and stomatal conductance by continuous observation. Stomatal conductance model was used and parameterized, combined with flux model, we analyzed the characteristics of stomatal flux in winter wheat under ozone pollution. At the same time, the stomatal conductance and stomatal ozone absorption flux of winter wheat were simulated in Jiangsu Province. The main results were as follows: Elevated ozone concentration could reduce stomatal conductance of winter wheat leaf and stomatal conductance decreased with the increase of ozone concentration. According to the observational data through the experiment, based on the boundary line technology, stomatal conductance model was parameterized to simulate stomatal conductance of wheat leaves from environmental factors. Approximately 90%, 77% and 83% variation of measured stomatal conductance could be explained by the stomatal conductance model. In the experiment, the total ozone absorption flux in ozone concentration of CK(53.67 nL&middot;L<sup>-1</sup>), 100nL&middot;L<sup>-1</sup>, 150nL&middot;L<sup>-1</sup>was 6.42 mmol&middot;m<sup>-2</sup>, 12.27 mmol&middot;m<sup>-2</sup>, 13.90 mmol&middot;m<sup>-2</sup>respectively. The ozone concentration gradually increased from early period to late period during the period of winter wheat growth in Jiangsu area. The average stomatal conductance followed the order of the middle stage&gt;the later stage&gt;the early stage. Winter wheat ozone cumulative absorption flux was the highest during the middle stage. &copy; 2017, Science Press. All right reserved.
Number of references:36
Main heading:Air pollution
Controlled terms:Crops - Environmental technology - Meteorology - Ozone - Ozone layer - Pollution
Uncontrolled terms:Climate - Jiangsu province - Ozone flux - Stomatal - Winter wheat
Classification code:451  Air Pollution - 454  Environmental Engineering - 804  Chemical Products Generally - 821.4  Agricultural Products
Numerical data indexing:Percentage 7.70e+01%, Percentage 8.30e+01%, Percentage 9.00e+01%
DOI:10.13227/j.hjkx.201607074

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 17>

Accession number:20171003409570
Title:Isolation, identification and metabolic characteristics of a heterotrophic denitrifying sulfur bacterial strain
Authors:Tan, Wen-Bo (1); Ma, Xiao-Dan (1); Huang, Cong (1); Chen, Chuan (1); Wang, Ai-Jie (1, 2)
Author affiliation:(1) State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin; 150090, China; (2) Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China
Corresponding author:Wang, Ai-Jie(ajwang@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:809-814
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Organics, sulfide and nitrogen compounds in industrial wastewater are significant challenges for wastewater treatment. These pollutants could be removed simultaneously from wastewater treatment system using biological technologies. In this study, a heterotrophic denitrifying sulfur bacterial strain HDD1 was isolated from wastewater treatment bioreactor. Strain HDD1 was identified as Thauera sp. based on the 16S rRNA gene phylogenetic analysis and physiological characteristics. Acetate and sulfide could be utilized as electron donors and nitrate as electron acceptor for respiration in Thauera sp. HDD1. The acetate (300 mg&middot;L<sup>-1</sup>), sulfide (200 mg&middot;L<sup>-1</sup>) and nitrate (487 mg&middot;L<sup>-1</sup>) were completely metabolized and removed within 15 hours. The main product of sulfide oxidation was elemental sulfur as identified by scanning electron microscope and energy dispersive spectrometer. These results suggest that the newly isolated Thauera sp. HDD1 could be used for simultaneous industrial wastewater treatment and elemental sulfur resource recovery. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Wastewater treatment
Controlled terms:Biological water treatment - Chemicals removal (water treatment) - Denitrification - Industrial water treatment - Nitrates - Nitrogen compounds - Reclamation - RNA - Scanning electron microscopy - Spectrometers  - Sulfur - Sulfur compounds
Uncontrolled terms:Acetate - Elemental sulfur - Energy dispersive spectrometers - Industrial wastewater treatment - Metabolic characteristics - Physiological characteristics - Sulfide - Wastewater treatment system
Classification code:445.1  Water Treatment Techniques - 445.1.2  Water Treatment Techniques for Industrial Use - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 741.3  Optical Devices and Systems - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 2.00e-01kg/m3, Mass_Density 3.00e-01kg/m3, Mass_Density 4.87e-01kg/m3, Time 5.40e+04s
DOI:10.13227/j.hjkx.201608034

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 18>

Accession number:20171003416431
Title:Characteristics and evaluation of heavy metal pollution in vegetables in guangzhou
Authors:Chen, Zhi-Liang (1); Huang, Ling (1, 2); Zhou, Cun-Yu (2); Zhong, Song-Xiong (1); Wang, Xin (1); Dai, Yu (1); Jiang, Xiao-Lu (1)
Author affiliation:(1) South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou; 510655, China; (2) School of Horticulture and Garden, Yangtze University, Jingzhou; 434025, China
Corresponding author:Zhou, Cun-Yu(zhoucy@yangtzeu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:389-398
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Vegetable is an indispensible component of human daily diet, and contamination of vegetables by heavy metals directly threatens human health. In this study, 116 vegetable samples were collected from 12 administrative districts of Guangzhou City for analysis of six heavy metals, Cu, Zn, Pb, Cd, Ni, Cr. A combination of single factor evaluation and Nemero Index analysis was employed to determine specific heavy metals exceeding allowable standards and analyze the characteristics of pollution. Risk of exposure was utilized to assess human health risks originating from eating locally planted vegetables contaminated by heavy metals. The results showed that contents of Cu, Zn in the 8 sorts of vegetables were below the standards of maximum allowable content and the contents of heavy mental Cr of up to 91.67% vegetable samples were higher than their standard. Lettuce sativa var. angustana Irish, Luffa acutangula L., Lycopersicon esculentum Mill. and Daucus carota L. were the 4 species of Pb exceeding vegetables, with the exceed ratio reaching up to 35.71% and Daucus carota L. exceeded the target value most seriously. Only the content of Cd in Lycopersicon esculentum Mill. was over-standard,with the rate of 31.25%. And the highest rate of over-standard of the content of Ni in 3 species of vegetables, which included Lactuca sativa L., Ipomoea aquatica Forsk and Brassica parachinensis, reached 8.33%. For the contamination level of the eight kinds of vegetable, Lactuca sativa L., Ipomoea aquatica Forsk, Brassica parachinensis, Raphanus sativus L. and Daucus carota L. were put into the class of alarming, while Lettuce sativa var. angustana Irish, Luffa acutangula L. and Lycopersicon esculentum Mill. were classified as secure. Heavy metals' comprehensive pollution degree of 4 species of vegetables presented a trend of leafy vegetables&gt;rootstalk vegetables&gt;stem vegetables&gt;solanaceous fruits. Health risk assessment showed that Guangzhou citizens eat more frequently Ipomoea aquatica Forsk and Lactuca sativa L. and Brassica parachinensis were prone to higher accumulation of heavy metals, and the dietary intake of heavy metal Cr might cause harm to human health and intake of Cd would bring potential health risk to the human body. Risk of exposure to heavy metal through oral ingestion of vegetables was proved to be higher for children than adults. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Copper
Controlled terms:Cadmium - Chemical contamination - Fruits - Health - Health risks - Heavy metals - Lead - Metal analysis - Nickel - Pollution  - Risk assessment - Value engineering - Vegetables - Zinc
Uncontrolled terms:Characteristics of pollution - Contamination levels - Guangzhou - Health evaluation - Heavy metal pollution - Lycopersicon esculentum Mill - Potential health risks - Single factor evaluation
Classification code:461.6  Medicine and Pharmacology - 461.7  Health Care - 531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 821.4  Agricultural Products - 822.3  Food Products - 911.5  Value Engineering - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 3.12e+01%, Percentage 3.57e+01%, Percentage 8.33e+00%, Percentage 9.17e+01%
DOI:10.13227/j.hjkx.201606138

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 19>

Accession number:20171003416387
Title:Interactive effects of the influencing factors on the changes of PM<inf>2.5</inf>concentration based on gam model
Authors:He, Xiang (1, 2, 3, 4, 5); Lin, Zhen-Shan (1, 3, 4, 5)
Author affiliation:(1) College of Geography Science, Nanjing Normal University, Nanjing; 210023, China; (2) Institute of Tourism, Kaili University, Kaili; 556011, China; (3) Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing; 210023, China; (4) State Key Laboratory Cultivation Base of Geographical Environment Evolution, Nanjing; Jiangsu Province; 210023, China; (5) Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing; 210023, China
Corresponding author:Lin, Zhen-Shan(linzhenshan@njnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:22-32
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In this paper, the generalized additive model (GAM) was introduced to analyze the interactive effects of the influencing factors on the change of PM<inf>2.5</inf>concentration during 2013-2015 in Nanjing city. The results showed as follows: PM<inf>2.5</inf>and its influencing factors appeared to follow normal distribution. There were strong correlations among the influencing factors, especially among the temperature(TEM), pressure(PRS) and water vapor pressure(VAP). For the single influencing factor GAM models of PM<inf>2.5</inf>concentration, all influencing factors passed the significance test. Moreover, the equation fitting degrees of SO<inf>2</inf>, CO, and NO<inf>2</inf>were much higher. In the multiple influencing factors GAM models of PM<inf>2.5</inf>concentration, the contribution of the SO<inf>2</inf>, CO, NO<inf>2</inf>, O<inf>3</inf>, precipitation (PRE), wind and relative humidity(RHU) to the change of PM<inf>2.5</inf>concentration was 73.9% with significant impacts on the change of PM<inf>2.5</inf>concentration. Based on the diagnostic analysis of the effect of multi factors on the change of PM<inf>2.5</inf>concentration, there were linear relationship between PM<inf>2.5</inf>and SO<inf>2</inf>, NO<inf>2</inf>and wind, and non-linear relationship between PM<inf>2.5</inf>and CO, O<inf>3</inf>, PRE and RHU. The GAM models, which considered the interaction of SO<inf>2</inf>respectively with CO, PRE and RHU, the interaction of CO respectively with NO<inf>2</inf>, O<inf>3</inf>, PRE, Wind and RHU, and the interaction of NO<inf>2</inf>respectively with Wind, PRE and RHU, all passed the significance test(P&lt;0.01 or P&lt;0.05). The interaction of SO<inf>2</inf>, CO and NO<inf>2</inf>respectively with other factors such as meteorological factors had the most important influence on the change of PM<inf>2.5</inf>concentration. At last, through the visualized three-dimensional map of the GAM models considering the interaction of the influencing factors on the PM<inf>2.5</inf>concentration, the interactive effects of the influencing factors on PM<inf>2.5</inf>concentration were quantitatively modeled. Our results demonstrated that GAM could be used to quantitatively analyze the interactive effect of the influencing factors on the change of PM<inf>2.5</inf>concentration. Therefore, the research method is innovative and important for PM<inf>2.5</inf>pollution and control. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Nitrogen oxides
Controlled terms:Normal distribution - Pollution control - Sulfur dioxide
Uncontrolled terms:Generalized additive model - Influencing factors - Interaction - Linear relationships - Meteorological factors - Nanjing cities - Non-linear relationships - Three-dimensional maps
Classification code:804.2  Inorganic Compounds - 922.1  Probability Theory
Numerical data indexing:Percentage 7.39e+01%
DOI:10.13227/j.hjkx.201606061

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 20>

Accession number:20172603860986
Title:Degradation of the Disperse Dye Neocron Black(NB) by Biological Treatment
Authors:Yang, Bo (1, 2); Ding, Feng-You (1, 2); Xu, Hui (1, 2); Li, Fang (1, 2); Tian, Qing (1, 2); Ma, Chun-Yan (1, 2)
Author affiliation:(1) State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai; 201620, China; (2) College of Environmental Science and Engineering, Donghua University, Shanghai; 201620, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1520-1528
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The biodegradation characteristics of the azo disperse dye neocron black (NB) were investigated under aerobic, anaerobic and anaerobic/aerobic conditions separately with the activated sludge system, and the biological degradation process of the dye was analyzed by spectrophotometry and gas chromatography mass spectrometry (GC-MS). The results showed that the degradation efficiency of NB dye was the highest under fully aerobic conditions, followed by the anaerobic/aerobic conditions, and fully anaerobic condition was the lowest. With the increase of the concentration of NB dye, the dye and the intermediate metabolite greatly decreased the microbial degradation efficiency of NB dye. The addition of carbon source could not only promote the biodegradation of NB dye, but also change the kinetic characteristics of the biodegradation process. The spectrophotometry and GC-MS determination results showed that the chromophore was completely degraded after biodegradation of NB dye. The intermediates metabolites of NB dye included 2,4-Dinitroaniline, 2-cyano-4-nitro aniline, p-Nitroaniline etc. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Biodegradation
Controlled terms:Activated sludge process - Aniline - Carbon - Chromophores - Degradation - Efficiency - Gas chromatography - Mass spectrometry - Metabolites - Spectrophotometry
Uncontrolled terms:Aerobic - Alternating aerobic/anaerobic condition - Anaerobic - Disperse dyes - Neocron black (NB)
Classification code:452.2  Sewage Treatment - 801  Chemistry - 801.2  Biochemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 913.1  Production Engineering - 941  Acoustical and Optical Measuring Instruments
DOI:10.13227/j.hjkx.201603007

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 21>

Accession number:20172603860978
Title:Identification and PAC Adsorption of Foulants Responsible for Irreversible Fouling During Ultrafiltration of Dongjiang River Water
Authors:Yang, Hai-Yan (1, 2); Wang, Can (3); Yan, Zhong-Sen (2); Li, Dong-Ping (1); Zhao, Yan (1); Qu, Fang-Shu (2); Liang, Heng (2); Xu, Ye-Qin (1); Li, Gui-Bai (2)
Author affiliation:(1) Guangdong GDH Water Co., Ltd., Shenzhen; 518021, China; (2) School of Environmental and Municipal Engineering, Harbin Institute of Technology, Harbin; 150090, China; (3) School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao; 266033, China
Corresponding author:Li, Gui-Bai(liguibai@vip.163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1460-1466
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Foulants responsible for hydraulic irreversible fouling in Dongjiang River water were identified by ultrafiltration process and their removal by powdered activated carbon (PAC) adsorption treatment was investigated using fluorescent excitation emission matrix and parallel factor analysis (EEM-PARAFAC). A correlation analysis was then carried out for samples between the maximum fluorescence intensities (F<inf>max</inf>) of three PARAFAC components after PAC adsorption and the surface properties of corresponding PAC samples. The results showed that two humic-like (C1 and C3) and one tryptophan-like fluorescent components were obtained through PARAFAC analysis, in which tryptophan-like component C2 was found to be the main substance in hydraulic irreversible foulants extracted from fouled membrane. Furthermore, the results of correlation analysis suggested that microspore area of PAC correlated with PAC adsorption of tryptophan-like fluorescent components, which played an important role in irreversible fouling. Both BET and mesopore+macropore area of PAC correlated with its adsorption of humic-like fluorescent components. The result provided support for selecting PAC in PAC-ultrafiltration hybrid process, which would be more effective for fouling control. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Factor analysis
Controlled terms:Activated carbon - Activated carbon treatment - Adsorption - Amino acids - Biological materials - Correlation methods - Fluorescence - Fouling - Multivariant analysis - Ultrafiltration  - Water resources
Uncontrolled terms:Correlation analysis - Excitation emission matrices - Fluorescence intensities - Foulants - Natural organic matters - Parallel factor analysis - Powdered activated carbon - Ultrafiltration process
Classification code:444  Water Resources - 461.2  Biological Materials and Tissue Engineering - 741.1  Light/Optics - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 922  Statistical Methods - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201609013

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 22>

Accession number:20172603860967
Title:Water Quality Analysis of Beijing Segment of South-to-North Water Diversion Middle Route Project
Authors:Xu, Hua-Shan (1); Zhao, Lei (1); Sun, Hao-Su (1); Ren, Yu-Fen (2); Ding, Tao (1); Chang, Shuai (1); Wang, Hai-Dong (1); Li, Miao (1); Guo, Zhao (1)
Author affiliation:(1) Daning Management Office of the Beijing South-to-North Water Diversion, Beijing; 102442, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China
Corresponding author:Ren, Yu-Fen(yfren@rcees.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1357-1365
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Water quality is the key problem that water management departments concern. Water quality of Beijing segment of South-to-North Water Diversion Middle Route Project is closely related to water security and social stability in Beijing. Since the connection of Beijing part in Middle Route of South-to-North Diversion Project, water quality data of Daning regulation and storage reservoir and Daning surge tank was collected, and water quality indexes including water temperature, total nitrogen, nitrate nitrogen, chloride ion, sulfate, dissolved oxygen, permanganate index, pH, ammonia nitrogen, fluorine ion and total phosphorus, were monitored monthly. With variance analysis, water quality difference among different water sources of the South-to-North Water Diversion of Middle Route was analyzed. With factor analysis method, the water quality risk factors of Daning regulation and storage reservoir and Daning surge tank were identified. The results were as following, water from Hebei province had higher contents of nitrate nitrogen, total nitrogen, fluorine ion, chloride ion and sulfate than those of water from Danjiangkou reservoir, but the water quality was not as good as that from Danjiangkou reservoir. LSD difference test results showed that the dissolved oxygen, nitrate nitrogen and total nitrogen of the water from Hebei province had significant differences (P&lt;0.05) between flood season and non-flood season, there was significant difference (P&lt;0.05) in pH of water from Danjiangkou reservoir between flood season and non-flood season, and the water quality of Danjiangkou reservoir was more stable than water from Heibei province. No matter in flood season or non-flood season, there were no significant differences (P&lt;0.05) in pH, dissolved oxygen, permanganate index, total phosphorus and ammonia nitrogen between the water from Danjiangkou reservoir and Heibei province, but there were significant differences (P&lt;0.05) in nitrate nitrogen, total nitrogen, fluorine ion and sulfate ion and chloride ion. Contents of Nitrate nitrogen, total nitrogen, sulfate and chloride ion in 2015 (the mixture of water from Hebei province and Danjiangkou reservoir) in Daning regulation and storage reservoir were lower than those in 2012-2014 (water from Hebei province), and the water from Danjiangkou reservoir played a key role in dilution and adjustment of the water from Hebei province in Daning regulation and storage reservoir. The water quality differences test results between 2012-2014 and 2015 showed that there were significant differences (P&lt;0.05) in the nitrate nitrogen, total nitrogen, fluorine ion, sulfate and chloride ion both in flood season and non-flood season, and the water quality of 2015 was better than that of 2012~2014 in non-flood season, but the differences of pH, dissolved oxygen, permanganate index, total phosphorus, ammonia nitrogen were not obvious (P&lt;0.05). The difference test results between Daning regulation and storage reservoir and Daning surge tank showed that Permanganate index, total nitrogen, fluorine ion, sulfate and chloride ion had significant differences (P&lt;0.05) both in flood season and non-flood season, and the contents of permanganate index, fluorine ion, sulfate and chloride ions in Daning regulation and storage reservoir were higher than those in Daning surge tank. The factor analysis results indicated that water quality potential risk factors both in Daning regulation and storage reservoir and Daning surge tank were mainly nitrogen, including ammonia nitrogen, nitrate nitrogen and total nitrogen, and potential risk factors also included total phosphorus in Daning regulation and storage reservoir. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Reservoirs (water)
Controlled terms:Ammonia - Biochemical oxygen demand - Chlorine compounds - Digital storage - Dissolution - Dissolved oxygen - Factor analysis - Flood control - Floods - Fluorine  - Ions - Multivariant analysis - Nitrates - Nitrogen - Oxygen - Phosphorus - Quality control - Risk assessment - Sulfur compounds - Surge tanks  - Tanks (containers) - Water management - Water quality
Uncontrolled terms:Danjiangkou reservoir - Factor analysis method - South to North water diversion - Storage reservoirs - Water quality analysis - Water quality data - Water quality indexes - Water temperatures
Classification code:441.2  Reservoirs - 445.2  Water Analysis - 619.2  Tanks - 722.1  Data Storage, Equipment and Techniques - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 913.3  Quality Assurance and Control - 914.1  Accidents and Accident Prevention - 922  Statistical Methods - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201607068

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 23>

Accession number:20172603860959
Title:Dry and Bulk Nitrogen Deposition in Suburbs of Xining City
Authors:Xu, Wen (1, 2); Jin, Xin (3); Luo, Shao-Hui (3); Feng, Zhao-Zhong (2); Zhang, Lin (4); Pan, Yue-Peng (5); Liu, Xue-Jun (1)
Author affiliation:(1) College of Resources and Environmental Sciences, China Agricultural University, Beijing; 100193, China; (2) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing; 100085, China; (3) Bureau of Qinghai Meteorology, Xining; 810001, China; (4) Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing; 100871, China; (5) State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing; 100029, China
Corresponding author:Liu, Xue-Jun(liu310@cau.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1279-1288
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study conducted a full two-year (2014 and 2015) measurements of dry and bulk deposition of atmospheric inorganic nitrogen (N) at the suburb of Xining city, Qinghai province. Dry N deposition fluxes were calculated by multiplying the atmospheric concentrations of NH<inf>3</inf>and NO<inf>2</inf>measured using passive samplers with the modeled dry deposition velocities provided by the GEOS-Chem global chemical transport model, while bulk N deposition fluxes were measured using precipitation gauge. Annual mean concentrations of gaseous NH<inf>3</inf>and NO<inf>2</inf>averaged 8.8 and 19.6 &mu;g&middot;m<sup>-3</sup>, respectively, with significantly higher values in 2015 than in 2014. Seasonal mean NH<inf>3</inf>concentrations were higher in spring and summer than in autumn and winter, but the concentrations of NO<inf>2</inf>changed little from season to season, with a small peak in autumn. Annual mean concentrations of NH<inf>4</inf><sup>+</sup>-N and NO<inf>3</inf><sup>-</sup>-N in precipitation averaged 2.2 and 1.8 mg&middot;L<sup>-1</sup>, respectively. Concentrations of NH<inf>4</inf><sup>+</sup>-N in autumn were~55% lower than those in other seasons, whereas those of NO<inf>3</inf><sup>-</sup>-N in autumn or winter were~26% higher than those in spring and summer. Dry deposition of NH<inf>3</inf>and NO<inf>2</inf>was 9.0 and 2.8 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>, respectively. Bulk deposition of NH<inf>4</inf><sup>+</sup>-N and NO<inf>3</inf><sup>-</sup>-N in precipitation was 7.6 and 6.2 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>, respectively. Reduced N (gaseous NH<inf>3</inf>and NH<inf>4</inf><sup>+</sup>-N in precipitation) was the dominant form of N deposition. The total dry and wet N deposition was 25.6 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>, which represented significant nutrient input from the environment to the suburban farmland, but this amount of deposited N exceeded the critical loads [10-20 kg&middot;(hm<sup>2</sup>&middot;a)<sup>-1</sup>] of terrestrial ecosystems, suggesting a risk of &ldquo;N saturation&rdquo; in the local natural environment. &copy; 2017, Science Press. All right reserved.
Number of references:41
Main heading:Nitrogen oxides
Controlled terms:Atmospheric chemistry - Atmospheric movements - Meteorological instruments - Nitrogen - Nitrogen compounds
Uncontrolled terms:Atmospheric concentration - Chemical transport models - Dry deposition - Dry deposition velocities - Suburban areas - Terrestrial ecosystems - Tibetan Plateau - Wet deposition
Classification code:443.1  Atmospheric Properties - 443.2  Meteorological Instrumentation - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Mass_Density 1.80e-03kg/m3, Mass_Density 2.20e-03kg/m3
DOI:10.13227/j.hjkx.201609237

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 24>

Accession number:20172603860988
Title:Short-cut Nitrification Recovery and Its Transformation into CANON Process in a Biofilm Reactor
Authors:Fu, Kun-Ming (1); Zhou, Hou-Tian (1); Su, Xue-Ying (1); Wang, Hui-Fang (1)
Author affiliation:(1) Key Laboratory of Urban Storm Water System and Water Environment, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing; 100044, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1536-1543
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A short-cut nitrification process with modified polyethylene as carrier was operated to investigate the biofilm short-cut nitrification recovery using synthetic inorganic ammonia-rich wastewater as influent at 30&#8451; &plusmn;1&#8451;. The short-cut nitrification was destroyed first by excessive aeration, and it was not built in 83 days under the condition of continuous aeration with DO less than 0.5 mg&middot;L<sup>-1</sup>and free ammonia (FA) more than 1.5 mg&middot;L<sup>-1</sup>, which are very beneficial to short-cut nitrification. However, short-cut nitrification was realized by changing continuous aeration to intermittent aeration on 84<sup>th</sup>day, and it was proved again on 142nd day. After that, biofilm system provided a living environment for ANAMMOX bacteria, anaerobic ammonia oxidation occurred, and the biofilm short-cut nitrification process was gradually transformed into CANON process. As the load of influent and aeration increased, the total nitrogen removal efficiency and removal load increased, and the total nitrogen removal load could reach up to 2.52 kg&middot;(m<sup>3</sup>&middot;d)<sup>-1</sup>. Finally, in the 3rd stage, &Delta;NO<inf>3</inf><sup>-</sup>-N/&Delta;TN was 0.10 on average, which means stabe short-cut nitrification in the CANON process. Therefore, once NOB was adapted to FA, it would be not very easy to recover short-cut nitrification, while intermittent aeration was an effective way, and the nitriation process would be finally transformed into CANON process, which would further improve the short-cut nitrification stability. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Nitrification
Controlled terms:Ammonia - Biofilms - Nitration - Nitrogen - Nitrogen removal - Recovery - Wastewater treatment
Uncontrolled terms:Anaerobic ammonium oxidation - Excessive aeration - Free ammonia - Intermittent aeration - Living environment - Nitrification process - Nitrite accumulation - Total nitrogen removal
Classification code:452.4  Industrial Wastes Treatment and Disposal - 462.5  Biomaterials (including synthetics) - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 2.27e-01yr, Mass_Density 1.50e-03kg/m3, Mass_Density 5.00e-04kg/m3
DOI:10.13227/j.hjkx.201609233

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 25>

Accession number:20172603860979
Title:Efficiency and Kinetics of Triclosan Degradation in Aqueous Solution by UV/Sodium Persulfate
Authors:Li, Qing-Song (1); Li, Xue-Yan (2); Yao, Ning-Bo (1, 2); Luo, Jing-Yu (1, 2); Li, Guo-Xin (1); Chen, Guo-Yuan (1); Gao, Nai-Yun (3)
Author affiliation:(1) Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen; 361024, China; (2) School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (3) National Key Laboratory of Pollution Control and Reuse, Tongji University, Shanghai; 200092, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1467-1476
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:UV activated sodium persulfate was employed to remove triclosan (TCS) in aqueous solution. The effects of several factors such as UV wavelength, UV<inf>254</inf>intensity, sodium persulfate dosage, pH value, and HA on TCS degradation were investigated. The second-order rate constants of free radicals (&middot;OH, SO<inf>4</inf><sup>&middot;-</sup>) reacting with TCS and their contributions to TCS removal were determined, respectively. The dominant free radical was also identified. Furthermore, the TCS degradation efficiency in natural water by UV<inf>254</inf>/SPS and UV<inf>254</inf>/H<inf>2</inf>O<inf>2</inf>was compared. Finally, the possible pathway and intermediate products of TCS degradation were analyzed with GC/MS. The results indicated that UV<inf>254</inf>activated sodium persulfate could effectively remove TCS. The removal rate of TCS could reach 98.15% within 100s under the conditions of UV wavelength of 254 nm,UV intensity of 11.5&mu;W&middot;cm<sup>-2</sup>,sodium persulfate dosage of 1mmol&middot;L<sup>-1</sup>,and TCS initial concentration of 275 &mu;g&middot;L<sup>-1</sup>. TCS degradation followed the pseudo-first-order kinetic model and the pseudo-first-order rate constant was determined to be 0.039 2 s<sup>-1</sup>. Pseudo-first-order rate constant for TCS degradation increased with the increase of UV<inf>254</inf>intensity(I)and sodium persulfate dosage within experiment ranges. The effect of UV wavelength on TCS removal was not notable. Neutral condition was detrimental to TCS degradation. TCS removal was inhibited in the presence of HA. The reaction rate constants for &middot;OH and SO<inf>4</inf><sup>&middot;-</sup>reacting with TCS were 7.62&times;10<sup>9</sup>L&middot;mol<sup>-1</sup>&middot;s<sup>-1</sup>and 9.86&times;10<sup>9</sup>L&middot;mol<sup>-1</sup>&middot;s<sup>-1</sup>,respectively. SO<inf>4</inf><sup>&middot;-</sup>was the dominant free radical and its contribution rate to TCS removal was 97.63% in UV<inf>254</inf>/SPS system. The K value of UV<inf>254</inf>/SPS was 4.13 times higher than that of UV<inf>254</inf>/H<inf>2</inf>O<inf>2</inf>process,which demonstrated that UV<inf>254</inf>/SPS process could remove TCS more effectively than UV<inf>254</inf>/H<inf>2</inf>O<inf>2</inf>. The main intermediate products found were 2,4-DCP and phenol in the degradation process of TCS in Milli-Q water by UV<inf>254</inf>/SPS. &copy; 2017, Science Press. All right reserved.
Number of references:36
Main heading:Rate constants
Controlled terms:Biodegradation - Chemical analysis - Chromatographic analysis - Degradation - Efficiency - Enzyme kinetics - Free radicals - Kinetics - Sodium - Solutions
Uncontrolled terms:Degradation efficiency - Initial concentration - Intermediates - Pseudo first order rate constants - Pseudo-first order kinetic model - Second-order rate constants - Sodium persulfate - Triclosan
Classification code:461.8  Biotechnology - 549.1  Alkali Metals - 802.2  Chemical Reactions - 913.1  Production Engineering - 931  Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Mass_Density 2.75e-04kg/m3, Molar_Concentration 1.00e+00mol/m3, Percentage 9.76e+01%, Percentage 9.82e+01%, Size 2.54e-07m, Surface_Power_Density 1.15e-01W/m2, Time 1.00e+02s
DOI:10.13227/j.hjkx.201609211

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 26>

Accession number:20172603860984
Title:Removal of Estrogenic Effect by Typical Domestic Wastewater Treatment Processes
Authors:Zhang, Qiu-Ya (1); Ma, Xiao-Yan (1); Wang, Xiao-Chang (1); You, Meng (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Corresponding author:Wang, Xiao-Chang(xcwang@xauat.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1506-1512
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Targeting at the characteristics of low concentration but high risk of endocrine disrupting compounds in the aquatic environment, the current study investigated the distribution of estrogenicity and E2 level using recombinant yeast estrogen screen (YES) and enzyme linked immunosorbent assay (ELSIA) during domestic wastewater treatment processes. The results showed that the levels of estrogenicity and E2 in influents of wastewater treatment plants were 4.35-7.58 ng&middot;L<sup>-1</sup>and 36.95-83.43 ng&middot;L<sup>-1</sup>, respectively. It was found that biological treatment processes played a crucial role in the removal of estrogenicity and E2, such as oxidation ditch, A<sup>2</sup>/O and A<sup>2</sup>/O followed by MBR, where the removal of estrogenicity and E2 was 71.10%-75.54% and 75.88%-80.72%, respectively. The activated sludge, with an estrogencity level of 1.84-2.43 ng&middot;g<sup>-1</sup>and an E2 level of 8.45-12.84 ng&middot;g<sup>-1</sup>, had the function of eliminating estrogenic effect to a certain extent by adsorption. The estrogenic activity in the effluent of domestic wastewater was 1.06-2.19 ng&middot;L<sup>-1</sup>, which will pose potential risk to the aquatic life in the environment. Last but not least, ELISA had a good correlation with YES assay, which provides a new method for rapid screening and assessment of water environmental estrogen. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Wastewater treatment
Controlled terms:Activated sludge process - Effluents - Endocrinology - Enzymes - Reclamation - Removal - Sewage lagoons - Sewage treatment plants - Wastewater - Yeast
Uncontrolled terms:Biological treatment process - Domestic waste water treatment - Endocrine disrupting compound - Environmental estrogens - Enzyme linked immunosorbent assay - Estrogenicity - Wastewater treatment plants - Yeast estrogen screen
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 461.6  Medicine and Pharmacology - 822.3  Food Products
Numerical data indexing:Mass_Density 1.06e-09kg/m3 to 2.19e-09kg/m3, Mass_Density 3.70e-08kg/m3 to 8.34e-08kg/m3, Mass_Density 4.35e-09kg/m3 to 7.58e-09kg/m3, Percentage 7.11e+01% to 7.55e+01%, Percentage 7.59e+01% to 8.07e+01%
DOI:10.13227/j.hjkx.201607232

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 27>

Accession number:20172603861004
Title:Alleviation Effects of Exogenous Melatonin on Ni Toxicity in Rice Seedings
Authors:Liu, Shi-Xiang (1, 2); Huang, Yi-Zong (1); Luo, Ze-Jiao (2); Huang, Yong-Chun (1); Jiang, Hang (1)
Author affiliation:(1) Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin; 300191, China; (2) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China
Corresponding author:Huang, Yi-Zong(yizonghuang@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1675-1682
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The alleviation effect of exogenous melatonin (MT) on Ni toxicity in rice seedings was investigated. The results showed that low concentration of Ni stress (10, 50 &mu;mol&middot;L<sup>-1</sup>) had little effect on the growth of root of rice seedings, while higher concentration of Ni stress (100-1 000 &mu;mol&middot;L<sup>-1</sup>) significantly inhibited the growth of rice root. Compared with the control treatment, the addition of 100 and 1 000 &mu;mol&middot;L<sup>-1</sup>Ni would decrease the total length and surface area of root by 63.3%-98.0% and 56.9%-96.3%, respectively. The results showed that addition of exogenous melatonin had a positive effect on the growth of rice seedings under Ni stress. This kind of positive effect was even more obvious in the root of rice seedings. The total length of rice root decreased by 58.4%-83.8% at Ni concentration of 100 &mu;mol&middot;L<sup>-1</sup>, whereas it decreased by only 8.7%-29.1% when 100 &mu;mol&middot;L<sup>-1</sup>Ni and 10 &mu;mol&middot;L<sup>-1</sup>MT were added, compared with the control treatment. The addition of exogenous melatonin had significant alleviation effects on oxidative stress in rice seedings caused by Ni. Compared with the 100 &mu;mol&middot;L<sup>-1</sup>Ni treatment, addition of 10 &mu;mol&middot;L<sup>-1</sup>exogenous MT could significantly decrease the production rate of O<inf>2</inf><sup>-&middot;</sup>by 43.2%-50.2% and the relative electrolytic leakage by 25.7%-31.6%, whereas increase the activities of CAT by 21.9%-33.7% and the soluble protein content by 82.6%-84.6%. The results suggested that application of exogenous melatonin could effectively alleviate the toxic effects of Ni on rice seedings. &copy; 2017, Science Press. All right reserved.
Number of references:24
Main heading:Nickel
Controlled terms:Hormones - Toxicity
Uncontrolled terms:Alleviation effect - Antioxidant systems - Control treatments - Low concentrations - Melatonin(MT) - Production rates - Rice - Soluble proteins
Classification code:461.2  Biological Materials and Tissue Engineering - 461.7  Health Care - 548.1  Nickel
Numerical data indexing:Molar_Concentration 1.00e-01mol/m3 to 1.00e+00mol/m3, Molar_Concentration 1.00e-01mol/m3, Molar_Concentration 1.00e-02mol/m3, Molar_Concentration 5.00e-02mol/m3, Percentage 2.19e+01% to 3.37e+01%, Percentage 2.57e+01% to 3.16e+01%, Percentage 4.32e+01% to 5.02e+01%, Percentage 5.69e+01% to 9.63e+01%, Percentage 5.84e+01% to 8.38e+01%, Percentage 6.33e+01% to 9.80e+01%, Percentage 8.26e+01% to 8.46e+01%, Percentage 8.70e+00% to 2.91e+01%
DOI:10.13227/j.hjkx.201609139

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 28>

Accession number:20171003416415
Title:Mechanism for effects of high free ammonia loadings on biological nitrification
Authors:Ji, Min (1); Liu, Ling-Jie (1); Zhai, Hong-Yan (1); Liu, Jing (1); Su, Xiao (1)
Author affiliation:(1) School of Environmental Science and Engineering, Tianjin University, Tianjin; 300350, China
Corresponding author:Zhai, Hong-Yan(zhaihy@tju.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:260-268
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Wastewater treatment plants treating industrial wastewater and municipal wastewater may suffer from unexpected shock loads of high ammonia concentrations, which can lead to inhibition of biological nitrification and failure to meet the wastewater discharge standards. In order to solve the problem of failure to meet the standards, the effects of high loadings of free ammonia (FA) on the nitrification process were investigated in this work using a sequencing batch reactor (SBR). For such purpose, maximum specific degradation rates of ammonia, maximum specific formation rates of nitrate, specific oxygen uptake rates and abundances of nitrifying bacteria were monitored. The results showed that FA promoted nitrification activities at low concentrations and inhibited the activities when the FA concentration exceeded a certain value. In addition, high loading concentrations of FA resulted in long recovery times. When the FA concentration increased from 3.6 mg&middot;L<sup>-1</sup>to 8.1 mg&middot;L<sup>-1</sup>, the abundances of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) increased slightly, as shown by the fluorescence in situ hybridization tests. However, there were apparent decreases in the abundances of AOB and NOB when the concentration of FA was higher than 8.1 mg&middot;L<sup>-1</sup>. The critical FA inhibitory concentrations for AOB and NOB were 8.1 mg&middot;L<sup>-1</sup>and 6.6 mg&middot;L<sup>-1</sup>. It was found that the NOB flora were more sensitive than AOB to FA inhibition. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Bacteria
Controlled terms:Ammonia - Batch reactors - Biodegradation - Biological water treatment - Degradation - Enzyme inhibition - Fluorescence microscopy - Industrial plants - Industrial water treatment - Lead removal (water treatment)  - Nitrification - Wastewater treatment
Uncontrolled terms:Ammonia nitrogen wastewaters - Ammonia oxidizing bacteria - Fluorescence in situ hybridization - Free ammonia - Nitrifying bacteria - Nitrite-oxidizing bacteria - Specific oxygen uptake rate - Wastewater treatment plants
Classification code:445.1  Water Treatment Techniques - 445.1.2  Water Treatment Techniques for Industrial Use - 452.4  Industrial Wastes Treatment and Disposal - 461.8  Biotechnology - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804.2  Inorganic Compounds - 931.4  Quantum Theory; Quantum Mechanics
Numerical data indexing:Mass_Density 3.60e-03kg/m3 to 8.10e-03kg/m3, Mass_Density 6.60e-03kg/m3, Mass_Density 8.10e-03kg/m3
DOI:10.13227/j.hjkx.201607116

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 29>

Accession number:20171003409560
Title:Remediation of decabromodiphenyl ether contaminated sediment through plant roots enhanced by exogenous microbes
Authors:Yang, Lei-Feng (1); Yin, Hua (1); Peng, Hui (2); Li, Yue-Peng (3)
Author affiliation:(1) Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, College of Environment and Energy, South China University of Technology, Guangzhou; 510006, China; (2) Department of Chemistry, Jinan University, Guangzhou; 510632, China; (3) Guangzhou Hailin Electronic Technology Co., Ltd., Guangzhou; 510407, China
Corresponding author:Yin, Hua(huayin@scut.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:721-727
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Decabromodiphenyl ether (BDE-209), a main ingredient of brominated flame retardants, has drawn more and more attention because of the pollution it caused in sediment. A pot experiment was conducted in a greenhouse to investigate the impact of Brevibacillus brevis and Enterococcus casselifavus on the enhancement of phytoremediation by Thalia dealbata, which is common in the river bank and was found to be an effective plant for BDE-209 removal. The concentration of organic acids, the amount of microorganisms and the ability of carbon utilization of soil microorganisms in different experimental groups were analyzed. The results showed that the removal rate of BDE-209 in the exogenous microbes containing groups were higher than that of the control. And B. brevis presented the highest enhancement of phytoremediation with the removal rate rising highest to 66% compared with the control (non-rhizosphere group 37.93% and no plant group 39.27%) after 60 days. The removal of BDE-209 in sediment, quantity of microorganism, concentration of organic acids and the ability of carbon utilization of soil microorganisms in rhizosphere sediment were higher than those in non-rhizosphere sediment. &copy; 2017, Science Press. All right reserved.
Number of references:30
Main heading:Microorganisms
Controlled terms:Bacteria - Bioremediation - Ethers - Flame retardants - Organic acids - Pollution - River pollution - Sediments - Soil pollution control - Soils
Uncontrolled terms:Brevibacillus brevis - Brominated flame retardants - Contaminated sediment - Decabromodiphenyl ethers - Decabromodiphenyl ethers (BDE209) - Experimental groups - Plant - Soil micro-organisms
Classification code:453  Water Pollution - 454.2  Environmental Impact and Protection - 461.9  Biology - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 803  Chemical Agents and Basic Industrial Chemicals - 804.1  Organic Compounds
Numerical data indexing:Age 1.64e-01yr, Percentage 3.79e+01%, Percentage 3.93e+01%, Percentage 6.60e+01%
DOI:10.13227/j.hjkx.201606180

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 30>

Accession number:20171003409526
Title:Correlation of speciated mercury with carbonaceous components in atmospheric PM<inf>2.5</inf>in Shengsi Region
Authors:Cheng, Na (1); Qian, Guan-Lei (2); Duan, Lian (1); Zhao, Meng-Fei (1); Xiu, Guang-Li (1)
Author affiliation:(1) State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources &amp; Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) Environmental Monitoring Station of Shengsi, Zhoushan; 202450, China
Corresponding author:Xiu, Guang-Li(xiugl@ecust.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:438-444
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:PM<inf>2.5</inf>samples of four seasons were collected from Nov. 2014 to Aug. 2015 at the site of Shengsi island in Zhoushan islands. Mercury (Hg) and speciated mercury concentrations in PM<inf>2.5</inf>samples were measured by Atomic Fluorescence Spectrometry (AFS-9130, China) after digestion with CEM Mars Xpress (PyNN Corporation, USA). The concentrations of organic carbon (OC) and elemental carbon (EC) in PM<inf>2.5</inf>samples were determined by thermal/optical carbon analyzer (DRI, USA). The results showed that the daily concentrations of PM<inf>2.5</inf>-bounded mercury (PBM) ranged from 0.02 to 1.25 ng&middot;m<sup>-3</sup>. Moreover, the mass content of PBM was (12.46&plusmn;18.79) &mu;g&middot;g<sup>-1</sup>, which was higher than those in continental cities. ANOVA analysis result suggested that the highest average mass concentrations of PBM occurred in fall, sequentially followed by spring, winter and summer. Higher concentrations of PBM were in fall and spring, which might be related to biomass burning. In addition, RPM took the highest fraction of 53.1% in PBM, followed by HPM (27.3%) and EPM (19.7%), which might be resulted from the complicated composition of marine aerosols. The strong correlations among OC, EC and PBM indicated that carbonaceous composition may affect the transport of Hg in the atmosphere. The ratio of OC/EC represents atmospheric photo-oxidation capacity, so the positive correlation between OC/EC ratio and HPM indicated that HPM was resulted from atmospheric gas-particle transformation. The negative correlation between Char-EC/soot-EC and mercury species indicated that the atmospheric particle-bounded mercury might come mainly from the input of external mercury sources. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Mercury (metal)
Controlled terms:Fluorescence spectroscopy - Organic carbon
Uncontrolled terms:Atmospheric particles - Atomic fluorescence spectrometry - Carbonaceous components - Island - Mass concentration - Mercury species - Negative correlation - Positive correlations
Classification code:549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 741.3  Optical Devices and Systems - 804.1  Organic Compounds
Numerical data indexing:Percentage 1.97e+01%, Percentage 2.73e+01%, Percentage 5.31e+01%
DOI:10.13227/j.hjkx.201607203

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 31>

Accession number:20171003409533
Title:Characteristics of mercury emissions from coal-fired power plants in Chongqing
Authors:Zhang, Cheng (1, 2); Zhang, Ya-Hui (1); Wang, Yong-Min (1); Wang, Ding-Yong (1, 2); Xu, Feng (3); Yang, Xi (3); He, Xiu-Qing (3)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China; (3) Chongqing Solid Wastes Management Center, Chongqing; 401117, China
Corresponding author:Wang, Ding-Yong(dywang@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:495-501
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Four typical coal-fired power plants in Chongqing, representing two different boiler types (circulating fluidized bed boiler and pulverized coal boiler), were chosen to investigate mercury emission characteristics through a mercury mass balance method by analyzing mercury contents in all input and output raw materials in order to accurately estimate mercury emissions. The results showed coal with mercury concentrations ranging (80.77&plusmn;6.39)-(266.83&plusmn;4.71) &mu;g&middot;kg<sup>-1</sup>could be a significant contributor of input mercury in these four studied power plants. Most mercury output from these power plants entered into solid waste with high proportion of mercury entering the fly ash in CFB plants and entering the fly ash and desulfurization gypsum in PC plants. Mercury removal efficiencies of studied plants were in the range of 72.89%-96.05%, and these efficiencies in CFB plants were higher than those in PC plants. The mercury emission factors for EF<inf>electricity</inf>and EF<inf>coal</inf>of these four plants were 4.66-29.47 &mu;g&middot;(kW&middot;h)<sup>-1</sup>and 8.55-71.77 mg&middot;t<sup>-1</sup>, respectively. The mercury emission was also calculated to be 6.13-429.17 g&middot;d<sup>-1</sup>. Mercury emissions from coal-fired power plants were associated with the content of mercury in coal, boiler type, generation load, pollution control equipment, and so on. To control the mercury emissions, more attention should be paid to improving the generation load, increasing the mercury removal efficiency of flue gas cleaning equipment, and strengthening the supervision of solid waste re-utilization. &copy; 2017, Science Press. All right reserved.
Number of references:26
Main heading:Fossil fuel power plants
Controlled terms:Boilers - Cleaning - Coal - Coal ash - Coal fueled furnaces - Control equipment - Efficiency - Fire tube boilers - Fluidized bed process - Fluidized beds  - Fly ash - Gas emissions - Gypsum plants - Mercury (metal) - Mining - Pollution control - Pollution control equipment - Pulverized fuel - Pulverized fuel fired boilers - Removal  - Solid wastes - Surface morphology - Temperature measurement
Uncontrolled terms:Circulating fluidized bed boiler - Coal-fired power plant - Emission factors - Mercury emissions - Pulverized coal boilers
Classification code:502.1  Mine and Quarry Operations - 524  Solid Fuels - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 614  Steam Power Plants - 614.2  Steam Power Plant Equipment and Operation - 732.1  Control Equipment - 802.3  Chemical Operations - 913.1  Production Engineering - 944.6  Temperature Measurements
Numerical data indexing:Percentage 7.29e+01% to 9.60e+01%
DOI:10.13227/j.hjkx.201608055

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 32>

Accession number:20171003409540
Title:Effect of coupling process of wetting-drying cycles and seasonal temperature increasing on sediment nitrogen minerization in the water level fluctuating zone
Authors:Lin, Jun-Jie (1, 4); Liu, Dan (2); Zhang, Shuai (1); Yu, Zhi-Guo (3); He, Li-Ping (1); Yu, Shun-Hui (1)
Author affiliation:(1) Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Georges University, Chongqing; 404100, China; (2) Department of Agricultural and Forestry Science and Technology, Chongqing Three Gorges Vocation College, Chongqing; 404100, China; (3) College of Hydrometeorology, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (4) Key Laboratory of Reservoir Aquatic Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:555-562
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To reveal the effect of coupling process of wetting-drying and seasonal temperature on sediment nitrogen (N) minerization, surface sediment samples were collected from the water level fluctuating zone(WLFZ) of Pengxi River crossing two hydrological sections. The sediment samples were incubated under drying and submerging conditions at the controlled temperature. The result showed that NO<inf>3</inf><sup>-</sup>-N and sand% in the sediment of higher altitude of water level (170 m) were higher than those in low altitudes (150 and 160 m), whereas contents of TN, NH<inf>4</inf><sup>+</sup>-N and clay% and silt% in low altitudes were much higher. Generally, Net N mineralization rate and cumulation were lower in higher altitude of water level during the drying period and submerging period. The ammonification rate decreased rapidly at the initial stage of incubation (0-7 d), and then had no obvious change, and no significant differences among altitudes was observed. The nitrification rate at low altitude decreased with incubation time, while it had only a little change at higher altitude; The nitrification contributed a higher fraction of net N mineralization than ammonification. Net N mineralization rate and its cumulation were significantly higher in the drying period than in the submerging period, while net N mineralization rate decreased with incubation time at all altitudes. Net N mineralization cumulation tended to rise first and then declined at all altitudes of the drying period, whereas it was continuously decreasing at the low water level altitude during the submerging period. Net N nitrogen mineralization rate of the drying period was positively correlate to both the sediment organic matter content and its C&#8758;N ratio, while it showed a negative correlation in the submerging period(P&lt;0.001). Net N mineralization was sensitive to temperature increase (Q<inf>10</inf>&gt;1) in the drying period, while it was insensitive during the submerging period of low altitude (Q<inf>10</inf>&lt;1). Thus, the impact of temperature on Net N mineralization was relatively low in submerging period of winter and N was accumulated with low releasing rate. In contrast to winter, summer exhibited warmer and drying period, this two factors would lead to higher N mineralization rate and further induce the potential risk of eutrophication as N releasing into water body. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Drying
Controlled terms:Eutrophication - Mineralogy - Nitrification - Nitrogen - River pollution - Sediments - Temperature - Water levels - Wetting
Uncontrolled terms:Controlled temperature - Impact of temperatures - N mineralization rate - Nitrogen mineralization - Sediment organic matters - The drying period - The submerging period - Three Gorges
Classification code:453  Water Pollution - 482  Mineralogy - 483  Soil Mechanics and Foundations - 641.1  Thermodynamics - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Size 1.50e+02m, Size 1.60e+02m, Size 1.70e+02m
DOI:10.13227/j.hjkx.201607236

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 33>

Accession number:20171003416385
Title:Source apportionment of volatile organic compounds and health assessment of benzene series in northern suburb of nanjing in winter
Authors:Zhang, Yu-Xin (1); An, Jun-Lin (1); Lin, Xu (2); Wang, Jun-Xiu (1); Shi, Yuan-Zhe (1); Liu, Jing-Da (1)
Author affiliation:(1) Joint International Research Laboratory of Climate and Environment Change, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing; 210044, China; (2) Hangzhou Environmental Monitoring Center, Hangzhou; 310007, China
Corresponding author:An, Jun-Lin(junlinan@nuist.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:1-12
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Volatile organic compounds (VOCs) in the atmosphere of the north suburb of Nanjing in December 2015 were determined by GC5000 online gas chromatography, and the main composition and characteristics of VOCs were analyzed by using the PMF receptor model sources of VOCs parsing. The United States Environmental Protection Agency (EPA) human exposure analysis and evaluation method in the United States were used to evaluate Human health risk of benzene series. The results showed that there were 6 sources in the PMF mode. Natural gas leakage accounted for 32.05%, automobile exhaust accounted for 18.99%, solvent use 13.67%, industrial emissions 2 13.20%, gasoline volatile 11.72%, and industrial emissions 1 (chemical type) 10.36%. The high value areas of the emission source were in accordance with the location of pollution sources surrounding the observation point. The B/T ratio was 0.74, which was at a relatively high level.The noncarcinogenic risk hazard quotient value HQ at 06:00 reached the highest value. HQ risk values were within the safe range specified by EPA. HQ of each source was as follows: automobile exhaust emissions 20.67&times;10<sup>-2</sup>, solvent use 6.97&times;10<sup>-2</sup>, natural gas leakage 6.34&times;10<sup>-2</sup>. In the carcinogenic risk of benzene, automobile exhaust emissions was 4.11&times;10<sup>-6</sup>, and natural gas leakage was 1.09&times;10<sup>-6</sup>, both were higher than the EPA specified safety threshold. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Gas chromatography
Controlled terms:Automobiles - Benzene - Chromatography - Environmental Protection Agency - Fiber optic sensors - Gas emissions - Hazards - Health risks - Industrial emissions - Natural gas  - Organic compounds - Risk assessment - Volatile organic compounds
Uncontrolled terms:Automobile exhaust emissions - Carcinogenic risk - Hazard quotients - Natural gas leakage - Noncarcinogenic risk - Online gas chromatography - Source apportionment - United states environmental protection agencies
Classification code:451.1  Air Pollution Sources - 454.2  Environmental Impact and Protection - 461.7  Health Care - 522  Gas Fuels - 662.1  Automobiles - 741.1.2  Fiber Optics - 802.3  Chemical Operations - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 1.04e+01%, Percentage 1.17e+01%, Percentage 1.32e+01%, Percentage 1.37e+01%, Percentage 1.90e+01%, Percentage 3.20e+01%
DOI:10.13227/j.hjkx.201605170

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 34>

Accession number:20171003416404
Title:Distribution, sources and risk assessment of the PAHs in the surface sediments and water from the daye lake
Authors:Zhang, Jia-Quan (1); Hu, Tian-Peng (1, 2); Xing, Xin-Li (2); Zheng, Huang (2); Zhang, Li (1); Zhan, Chang-Lin (1); Liu, Hong-Xia (1); Xiao, Wen-Sheng (1); Qi, Shi-Hua (2)
Author affiliation:(1) School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi; 435003, China; (2) School of Environmental Studies, China University of Geosciences, Wuhan; 430074, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:170-179
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:8 surface sediments and 8 water samples were collected from the Daye Lake in August 2015. The 16 kinds of EPA control polycyclic aromatic hydrocarbons (PAHs) were analyzed by GC-MS. The results showed that the PAHs concentrations of surface sediments and water ranged from 35.94 ng&middot;g<sup>-1</sup>to 2 032.73 ng&middot;g<sup>-1</sup>and from 27.94 ng&middot;L<sup>-1</sup>to 242.95 ng&middot;L<sup>-1</sup>, with average contents of 940.61 ng&middot;g<sup>-1</sup>and 107.77ng&middot;L<sup>-1</sup>, respectively. The distribution of PAHs in surface sediments indicated that the contents in the center samples were higher than those in the bank samples, but the water showed nearly the opposite tendency. The 4-5 rings high molecular weight PAHs were the main components in the surface sediments, and the 2, 4 and 5 rings PAHs were given priority in water. Compared with the other domestic and oversea lakes, the PAHs pollution of the Daye Lake was at a moderate level. Source apportionment showed that the PAHs in surface sediments and water from the Daye Lake came from the combustion source, HWM-PAHs were the dominant part of the PAHs in the sediment, reflecting the sediment PAHs pollution under the effects of mining and smelting over a long period; All monomer PAHs and total PAHs content in sediment did not exceed the ERM and FEL limiting values, showing that there was no particularly serious ecological risk caused by PAHs in the surface sediments from the Daye Lake; the incremental lifetime cancer risks assessment showed that the uptake risk of PAHs in Daye Lake water through the ingestion and dermal absorption were both in the acceptable range recommended by the USEPA, but all sites had higher risk than the acceptable risk level recommended by the Sweden environmental protection agency and Royal society. The pollution of seven carcinogenic PAHs needs prevention and control. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Lake pollution
Controlled terms:Aromatic hydrocarbons - Environmental Protection Agency - Health risks - Lakes - Pollution - Pollution control - Polycyclic aromatic hydrocarbons - Risk assessment - Sediments - Surficial sediments  - Water - Water absorption - Water pollution
Uncontrolled terms:Acceptable risk levels - Carcinogenic PAHs - Combustion sources - High molecular weight - Polycyclic aromatic hydrocarbons (PAHS) - Prevention and controls - Source apportionment - Surface sediments
Classification code:453  Water Pollution - 454.2  Environmental Impact and Protection - 461.7  Health Care - 483  Soil Mechanics and Foundations - 802.3  Chemical Operations - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention
Numerical data indexing:Mass_Density 1.08e-07kg/m3, Mass_Density 2.79e-08kg/m3 to 2.43e-07kg/m3
DOI:10.13227/j.hjkx.201606058

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 35>

Accession number:20171003416386
Title:Size distribution and mixing state of black carbon aerosol in nanjing during a heavy winter pollution event
Authors:Jiang, Lei (1); Tang, Li-Li (1, 2); Pan, Liang-Bao (1, 2); Liu, Dan-Tong (3); Hua, Yan (1); Zhang, Yun-Jiang (1); Zhou, Hong-Cang (1); Cui, Yu-Hang (1)
Author affiliation:(1) Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), School of Environmental Science and Engineering, University of Information Science &amp; Technology, Nanjing; 210044, China; (2) Jiangsu Environmental Monitoring Center, Nanjing; 210036, China; (3) Centre for Atmospheric Science, Atmospheric and Environmental Sciences, University of Manchester, Manchester; M139PL, United Kingdom
Corresponding author:Tang, Li-Li(lily3258@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:13-21
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In December 2013, a lasting haze pollution event occurred in the Central and East regions of China. Here in this paper, using a single-particle soot photometer (SP2), we studied mass concentrations, mixing states, and size distributions of black carbon (BC) in this event. The results showed that BC mass concentration in Nanjing during the observation period was in the range of 1.01-14.05 &mu;g&middot;m<sup>-3</sup>with an average of 4.39 &mu;g&middot;m<sup>-3</sup>, showing the characteristics of double peaks for lighter pollution, andhigh in the nighttime and low in the daytime during heavier pollution. Using the relative coating thickness(D<inf>p</inf>/D<inf>c</inf>)to define mixing state of black carbon, diurnal variations were higher in early morning and noon when slightly polluted, and lower during rush hour, indicating the degree of BC ageing was deeper in the morning and afternoon, with fresher particles near the ground source emissions during rush hour. The relative coating thickness did not vary greatly throughout the day when heavily polluted, which was expected to be linked to regional pollutants and it also showed Gas-solid transformation under high relative humidity. The average mass and number size distribution had single peaking with the same BC volume-equivalent diameter in different degrees of pollution, with the peak diameter at 100 nm for the number distribution when heavily polluted, at 91 nm when slightly polluted, and at 210 nm for the mass distribution regardless of the degree of pollution. We could find regional differences of BC sources by comparing the observed research worldwide. This study has very important reference value for the in-depth understanding of BC pollution in Yangtze River Delta. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:River pollution
Controlled terms:Coatings - Fog - Mixing - Photometers - Photometry - Pollution - Size distribution - Soot - Thickness measurement
Uncontrolled terms:Black carbon - High relative humidities - In-depth understanding - Mixing state - Nanjing - Number size distribution - Regional differences - Single particle
Classification code:443.1  Atmospheric Properties - 453  Water Pollution - 802.3  Chemical Operations - 804  Chemical Products Generally - 813.2  Coating Materials - 922.2  Mathematical Statistics - 941.3  Optical Instruments - 941.4  Optical Variables Measurements - 943.2  Mechanical Variables Measurements
Numerical data indexing:Size 1.00e-07m, Size 2.10e-07m, Size 9.10e-08m
DOI:10.13227/j.hjkx.201605167

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 36>

Accession number:20172603860995
Title:Distribution Characteristics and Influencing Factors of Organophosphorus Pesticides in Typical Soil Environment of Jianghan Plain
Authors:Wang, Jian-Wei (1); Zhang, Cai-Xiang (1); Pan, Zhen-Zhen (2); Liao, Xiao-Ping (1); Liu, Yuan (1); L&uuml;, You (1); Tang, Mi (1)
Author affiliation:(1) State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan; 430074, China; (2) Geography and Tourism College, Chongqing Normal University, Chongqing; 400047, China
Corresponding author:Zhang, Cai-Xiang(caixiangzhang@yahoo.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1597-1605
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to study the distribution characteristics of organophosphorus pesticides (OPPs)in the soil of Jianghan plain,78 profile-soil samples from various depth and 7 surface-soil samples were collected in September,2015 in established groundwater monitoring field site, Jianghan plain. The OPPs concentrations were determined by gas chromatography with nitrogen-phosphorus detector(GC-NPD). The results showed that OPPs were widespread in our studied area. The OPPs concentrations of suface-soil samples ranged from 89.80 ng&middot;g<sup>-1</sup>to 193.85 ng&middot;g<sup>-1</sup>,with an average of 140.05 ng&middot;g<sup>-1</sup>, whereas the OPPs concentrations of profile-soil samples ranged from 19.81 ng&middot;g<sup>-1</sup>to 138.28 ng&middot;g<sup>-1</sup>,with an average of 40.99 ng&middot;g<sup>-1</sup>. The main ingredients of OPPs in surface and profile soil samples were methamidophos, omethoate, diazinon and quinalphos,and the residual amount of 10 kinds of OPPs had posed a threat to agricultural products according to the America soil pesticide residue limits standards. The horizontal distribution of OPPs concentration in profile soil followed the order of nearby river farm area&gt;nearby river area&gt;farm area, namely GS1-1&gt;GS4&gt;GS2&gt;GS3. while the vertical distribution mostly decreased at first and then increased with increasing depth. The distribution characteristics of OPPs were also influenced by many factors, such as application amount of OPPs, the adsorption and desorption actions of soil, vertical movement of groundwater, the terrain environment in the study area, and the concentration of soil organic matters. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Soil surveys
Controlled terms:Agricultural products - Gas chromatography - Groundwater - Nitrogen - Pesticides - Soil pollution - Soils
Uncontrolled terms:Distribution characteristics - Influencing factors - Jianghan plains - Organophos-phorus pesticides - Typical soils
Classification code:444.2  Groundwater - 483.1  Soils and Soil Mechanics - 802.3  Chemical Operations - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 821.4  Agricultural Products
DOI:10.13227/j.hjkx.201609206

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 37>

Accession number:20172603860987
Title:Function of Polyphosphate Kinase Gene in Biological Phosphate Removal During the Wastewater Treatment Process
Authors:Nan, Ya-Ping (1); Zhou, Guo-Biao (1); Yuan, Lin-Jiang (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture &amp; Technology, Xi'an; 710055, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1529-1535
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:This study aimed to identify the function of polyphosphate kinase gene (ppk) in phosphorus removal. With the Red system, the target DNA with the homologous short arms was amplified in the plasmid pKD4. Then the target DNA was transformed into E. coli ATCC25922 which already had the suicide plasmid pKD46 by electroporation. The plasmid pCP20 was transformed into the recombinant strains to delete the kanamycin resistance gene. With the screening by negative resistance, together with verification using positive and negative primers, the construction of ppk gene deletion strain E. coli/ppk<sup>-</sup>Kan<sup>-</sup>was confirmed. The growth characteristics of both the wild-type strain and the mutant strain were determined, and the phosphate accumulating characteristics were compared when cultured in the phosphate luxuriant medium after induced in the phosphate lacking medium. Also the phosphate accumulating characteristics of the two strains were compared after cultured in the anaerobic and aerobic alternating conditions for 5 times. The results showed that the ppk deletion strain E. coli/ppk<sup>-</sup>Kan<sup>-</sup>was successfully constructed. There was no growth difference between the mutant strain and the wild-type strain. But in the first 4 hours of log phase, the mutant strain grew faster than the wild-type strain. And 8h later, when both strains were in stationary phase, the mutant strain grew slower than the wild type, indicating that ppk affected the growth of the bacteria. Cultured in the phosphate lacking medium and the phosphate luxuriant medium, the mutant strain's ability of phosphate accumulating didn't decrease in spite of having no ppk gene. After 5 times induction, the amounts of phosphorus in both strains were about 1%-2%. The phosphate amounts in the cells did not increase with increasing inducing times. Polyphosphate or PHB was detected neither at anaerobic phase nor at the aerobic phase. It indicated that the deletion of ppk did not affect the phosphorus removal in wastewater treatment process, and the ppk gene did not show the function of phosphorus removal. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Wastewater treatment
Controlled terms:Biological water treatment - DNA - Enzymes - Escherichia coli - Genes - Phosphorus
Uncontrolled terms:Gene deletion - Growth characteristic - Phosphate removal - Phosphorus removal - Polyphosphates - Recombinant strains - Wastewater treatment process - Wild-type strain
Classification code:445.1  Water Treatment Techniques - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 804  Chemical Products Generally
Numerical data indexing:Percentage 1.00e+00% to 2.00e+00%, Time 1.44e+04s, Time 2.88e+04s
DOI:10.13227/j.hjkx.201606164

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 38>

Accession number:20172603860980
Title:Influencing Factors on the Degradation of PFOS Through VUV-SO<inf>3</inf><sup>2-</sup>
Authors:Han, Hui-Li (1); Wang, Hong-Jie (1); Dong, Wen-Yi (1)
Author affiliation:(1) Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen; 518055, China
Corresponding author:Wang, Hong-Jie(whj1533@qq.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1477-1482
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The objective of this experiment was to investigate the influence of SO<inf>3</inf><sup>2-</sup>dosage, pH value, initial perfluorooctane sulfonate(PFOS)concentration as well as coexisting substances on the degradation and defluorination of PFOS by VUV-SO<inf>3</inf><sup>2-</sup>process. The results indicated that the increase of SO<inf>3</inf><sup>2-</sup>dosage could lead to rise in the concentration of active species hydrated electron(e<inf>aq</inf><sup>-</sup>) and thus enhance the degradation and defluorination of PFOS. As the concentration of SO<inf>3</inf><sup>2-</sup>increased from 1 mmol&middot;L<sup>-1</sup>to 20 mmol&middot;L<sup>-1</sup>, the degradation and defluorination rates of PFOS increased from 45% and 40% to 97% and 63%, respectively. The degradation and defluorination of PFOS were also enhanced with the increment of the solution pH values, and the defluorination was more sensitive to the pH values. In addition, more PFOS was degraded with the increase of initial PFOS mass concentration, although the degradation and defluorination rates of PFOS were reduced. When the initial PFOS mass concentration changed from 1 mg&middot;L<sup>-1</sup>to 50 mg&middot;L<sup>-1</sup>, the degradation amount of PFOS after four hrs increased by about 50 times, probably due to the higher utilization proportion of e<inf>aq</inf><sup>-</sup>at high pollutants concentration. Last but not least, the influence of co-existing substances, Cl<sup>-</sup>and HCO<inf>3</inf><sup>-</sup>, on PFOS degradation could be neglected, whereas their effects on defluorination were observed. Defluorination of PFOS was enhanced with the increased Cl<sup>-</sup>concentration, however, increased first and then decreased with the increment of HCO<inf>3</inf><sup>-</sup>concentration. It was also found that the presence of humic acid(HA) lowered degradation as well as defluorination of PFOS owing to the blockage of effective UV light and trapping of active species for photochemical reaction. &copy; 2017, Science Press. All right reserved.
Number of references:22
Main heading:pH
Controlled terms:Hydration - Photochemical reactions
Uncontrolled terms:Hydrated electron - Influencing factors - Perfluorooctane sulfonates - Photochemical reduction - VUV-SO<inf>3</inf><sup>2-</sup>
Classification code:741.1  Light/Optics - 801.1  Chemistry, General
Numerical data indexing:Mass_Density 1.00e-03kg/m3 to 5.00e-02kg/m3, Molar_Concentration 1.00e+00mol/m3 to 2.00e+01mol/m3, Percentage 4.00e+01% to 9.70e+01%, Percentage 4.50e+01%, Percentage 6.30e+01%
DOI:10.13227/j.hjkx.201609204

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 39>

Accession number:20172603860992
Title:Assessment of Heavy Metal Pollution and Tracing Sources by Pb &amp; Sr Isotope in the Soil Profile of Woodland in Quanzhou
Authors:Sun, Jing-Wei (1, 2); Yu, Rui-Lian (1); Hu, Gong-Ren (1); Su, Guang-Ming (1); Wang, Xiao-Ming (3)
Author affiliation:(1) Department of Environmental Science and Engineering, Huaqiao University, Xiamen; 361021, China; (2) School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou; 362000, China; (3) Center of Analysis, Beijing Research Institute of Uranium Geology, Beijing; 100029, China
Corresponding author:Hu, Gong-Ren(grhu@hqu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1566-1575
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The contents of 8 heavy metal elements (Sr, Ni, Fe, Cr, Cu, Mn, Pb, Zn) and the lead &amp; strontium isotope composition of soil profile of woodland in Quanzhou city were analyzed by AAS and ICP-MS, respectively. A modified BCR four-step sequential extraction procedure was carried out to obtain the speciation fractionation of heavy metals in the soil profile from 4 stations. The results of the heavy metal elements and the speciation fractionation of heavy metals in the soil profile showed that the heavy metal pollution in the woodland in Quanzhou was relatively light, and the main pollution factor was Sr. The non-residue state of Pb was the highest, leading to the highest activity. The result of Nemero comprehensive pollution index showed that Sr in the depth of 0-60 cm was at heavy pollution level. The results of the RSP showed that the activity of Pb was the highest. The results of EF showed that Pb, Sr, Mn and Zn had exogenous sources. Factor analysis showed that the main sources of heavy metals were the compound pollution of agricultural activities, natural resources, and the vehicle exhaust. Composition of Pb isotopic ratios showed that, Pb in soil profile of woodland in Quanzhou was from vehicle exhaust and parent material. The contribution rates of the two sources in the soil profile were calculated by using the two-mixed model. The contribution rates of parent material and vehicle exhaust were 85.14%(62.53%-98.36%) and 14.86%(1.640%-37.47%) on average, respectively. Strontium isotope tracing results showed that the main sources of strontium were also vehicle exhaust and parent material. Coupling both Pb and Sr isotope ratios agreed with the above mentioned results. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Copper
Controlled terms:Factor analysis - Heavy metals - Isotopes - Lead - Manganese - Multivariant analysis - Pollution - Soils - Strontium - Vehicles  - Zinc
Uncontrolled terms:Enrichment factors - Source apportionment - Sr isotopes - Vertical profile - Woodland
Classification code:483.1  Soils and Soil Mechanics - 531  Metallurgy and Metallography - 543.2  Manganese and Alloys - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 549.2  Alkaline Earth Metals - 922  Statistical Methods - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.64e+00% to 3.75e+01%, Percentage 6.25e+01% to 9.84e+01%, Size 0.00e+00m to 6.00e-01m
DOI:10.13227/j.hjkx.201609131

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 40>

Accession number:20172603861001
Title:Effect of Application of Sewage Sludge Composts on Greenhouse Gas Emissions in Soil
Authors:Yang, Yu-Han (1); Yi, Jian-Ting (1); Zhang, Cheng (1, 2); Chen, Hong (1, 2); Mu, Zhi-Jian (1, 2)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400715, China
Corresponding author:Zhang, Cheng(zhcheng@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1647-1653
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Effect of application of sewage sludge compost on the emission of greenhouse gas from soil was investigated by analyzing the dynamic characteristics and emission factor of CO<inf>2</inf>, CH<inf>4</inf>and N<inf>2</inf>O in soil after spiking two different composts (A: compost with biochar, B: compost without biochar) with varying fertilizing amount into soil. The results indicated that emissions of CO<inf>2</inf>and CH<inf>4</inf>mainly occurred in the plant growth period with low fertilizer amount of biomass charcoal compost reducing CO<inf>2</inf>emissions, and high application content increasing CO<inf>2</inf>emissions. CH<inf>4</inf>emission fluxes showed negative values, indicating that soil could adsorb CH<inf>4</inf>, and the adsorbing amount for control was significantly higher than those for other treatments (P&lt;0.01). The absorbing amount in treatment A increased with the fertilizing amount (P&lt;0.05). N<inf>2</inf>O emissions mainly occurred at the germination and seedling stages, and emission fluxes increased with the fertilizing amount (P&lt;0.01). N<inf>2</inf>O was considered as the main generated greenhouse gas during agricultural process with sludge compost, and its emission factor from sludge compost soil was 1.02%-1.90% (A compost) and 1.28%-2.93% (B compost), respectively. Biochar could significantly reduce the carbon emission, as the total greenhouse gas released from soil with biochar compost was 19.49% to 35.56% less than that in soil without biochar, which was more obvious for N<inf>2</inf>O emission reduction (compared with CH<inf>4</inf>mitigation). &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Composting
Controlled terms:Carbon - Carbon dioxide - Charcoal - Emission control - Gas emissions - Gases - Greenhouse effect - Greenhouse gases - Sewage sludge - Soils
Uncontrolled terms:Agricultural process - Bio chars - Carbon emissions - Compost products - Dynamic characteristics - Emission characteristics - Emission reduction - Sewage sludge compost
Classification code:451  Air Pollution - 452.2  Sewage Treatment - 483.1  Soils and Soil Mechanics - 524  Solid Fuels - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.95e+01% to 3.56e+01%
DOI:10.13227/j.hjkx.201606060

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 41>

Accession number:20172603860998
Title:Effects of Biochar on Surface Albedo and Soil Respiration in Suburban Agricultural Soil
Authors:Zhang, Yang-Yang (1); Hu, Xue-Yu (1); Zou, Juan (1); Zhang, Di (1); Chen, Wei (1); Wang, Xiang-Qian (1); Chen, Yao-Jun (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:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1622-1632
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Biochar application to soils is currently considered as a means of mitigating climate change by sequestering C, which withdraws CO<inf>2</inf>from the atmosphere and consequently influences the trend of global climate change. However, only a few studies have been done on surface albedo variations on farmland, it might be true that the application of biochar to soil could induce a radiative forcing by changing the surface albedo. Based on this background, this study aiming at the characterization of seasonal changes in albedo on the farmland both with plants and without plants, and its effect on soil temperature, soil moisture, soil respiration and soil organic carbon fractions. There were 3 major treatments in the experiment with 3 repetition of each major treatment, namely, CK (the control treatment), BC0.5 (biochar applied at 0.5 kg&middot;(m<sup>2</sup>&middot;a)<sup>-1</sup>) and BC4.5 (biochar applied at 4.5 kg&middot;(m<sup>2</sup>&middot;a)<sup>-1</sup>). Each major treatment contained 2 sub-treatments, which were crop cultivation (+) and non-cultivation (-). The experiment results showed that in the early stage of crop growth (maize seedling stage to jointing stage, wheat seedling stage to winter period), the surface albedo of BC4.5+ and BC0.5+ significantly decreased compared with CK+(P&lt;0.05). The biggest surface albedo decline rates of BC4.5+ and BC0.5+ in winter wheat season were 23.7%, 17.9% and 44.5%, 44.9% in summer maize season. The leaf area index of each treatment was remarkably correlated with the surface albedo. The shadow produced by the development of crop canopy structure would cover the change of surface color induced by the input of biochar. Under the condition of bare land, the surface albedo of biochar treatment was significantly decreased compared with the control treatment(P&lt;0.05). Compared with the control treatments, the soil CO<inf>2</inf>flux of the biochar treatments was significantly increased(P&lt;0.05). With the extension of time, the growth rate of soil CO<inf>2</inf>flux of biochar treatment was decreased gradually. The increase from BC4.5+ to CK+ was gradually reduced from 276.7% to 36.1%, and the increase of BC4.5- from to CK- was significantly reduced from 163.5% to 39.8%. The increase of soil CO<inf>2</inf>flux could be derived from the mineralization of the readily decomposed carbon fractions in the biochar-soil system. The decrease of surface albedo caused by the input of biochar had no direct effect on soil respiration, and the input of biochar could reduce the temperature sensitivity of soil respiration. This result could provide a foundation for the verification of the chemical and biological stability of biochar. &copy; 2017, Science Press. All right reserved.
Number of references:31
Main heading:Soils
Controlled terms:Atmospheric radiation - Carbon dioxide - Chemical stability - Climate change - Crops - Cultivation - Farms - Organic carbon - Plants (botany) - Soil moisture  - Solar radiation
Uncontrolled terms:Agricultural soils - Bio chars - Chemical and biologicals - Global climate changes - Soil organic carbon - Soil respiration - Surface albedo - Temperature sensitivity
Classification code:443.1  Atmospheric Properties - 483.1  Soils and Soil Mechanics - 657.1  Solar Energy and Phenomena - 801  Chemistry - 804.1  Organic Compounds - 804.2  Inorganic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 1.64e+02% to 3.98e+01%, Percentage 1.79e+01%, Percentage 2.37e+01%, Percentage 2.77e+02% to 3.61e+01%, Percentage 4.45e+01%, Percentage 4.49e+01%
DOI:10.13227/j.hjkx.201609149

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 42>

Accession number:20172703864526
Title:Distributions, Sources and Pollution Assessment of Hg in Sediment of Douhe Reservoir in Tangshan City
Authors:Wu, Ting-Ting (1); Wang, Ming-Meng (2); Chen, Xu-Feng (3); Liu, Wen-Li (3); Li, Tai-Shan (3); Yan, Hai-Yu (4); He, Tian-Rong (1); Li, Zhong-Gen (4)
Author affiliation:(1) Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University, Guiyang; 550003, China; (2) College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan; 030024, China; (3) Tangshan Municipal Environmental Monitoring Center, Tangshan; 063000, China; (4) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang; 550081, China
Corresponding author:Li, Zhong-Gen(lizhonggen@vip.skleg.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:979-986
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sediment cores from Douhe reservoir in Tangshan City were sampled in August 2013, in order to evaluate the mercury (Hg) pollution degree and its possible sources. Agriculture soils surrounding the Douhe reservoir and sediments from an upstream reservoir (Daheiting) were also collected. Total mercury (THg), methylmercury (MeHg), dissolved mercury in pore water (DHg) and organic matter (OM) in sediment of Douhe reservoir were analyzed, while, only THg in the agriculture soils and upstream reservoir sediments was determined. Finally, the geoaccumulation index method was applied to evaluate the Hg pollution status in soils and reservoir sediments. The results showed that THg content in sediment of Douhe reservoir ranged from 19 to 97 ng&middot;g<sup>-1</sup>. dw, MeHg (dw) from 0.02 to 1.27 ng&middot;g<sup>-1</sup>, and the contents of both THg and MeHg were higher in the upper layers than the deeper layers, indicating that Hg in sediments was increasing in recent years by the exogenetic loadings. THg (dw) in soils offshore the Douhe reservoir, which is close to a large coal-fired power plant, averaged at 22 ng&middot;g<sup>-1</sup>. Among the three sediment cores of Douhe reservoir, the central point had the highest THg, followed by the western site, and the eastern site had the lowest THg. While, THg content (dw) in sediments of Daheiting reservoir was much higher, with a mean of 176 ng&middot;g<sup>-1</sup>. Combining all the above information, we concluded that Hg in Douhe reservoir was mainly derived from the Daheiting reservoir and the mercury atmospheric deposition from the nearby coal-fired power plant contributed a less content. THg and MeHg in the sediments of Douhe reservoir were positively correlated with OM, indicating that OM in sediments had good ability of adsorbing THg and MeHg, and also played an important role in Hg methylation. The geoaccumulation index (I<inf>geo</inf>) showed that the Hg pollution status deceased in this order: central of Daheting, Daba of Daheting, central of Douhe, western of Douhe, eastern of Douhe, soils surrounding Douhe. Central and western sites in Douhe belonged to moderate pollution and the eastern site belonged to slight pollution. While, sediments of Daheiting reservoir, affected by the iron ore mining activities, were in the moderate and strong pollution status. &copy; 2017, Science Press. All right reserved.
Number of references:27
Main heading:Sediments
Controlled terms:Agriculture - Alkylation - Coal - Coal fueled furnaces - Fossil fuel power plants - Mercury (metal) - Meteorological problems - Petroleum reservoir evaluation - Pollution - Reservoirs (water)  - Sedimentation - Soils
Uncontrolled terms:Agriculture soils - Atmospheric depositions - Coal-fired power plant - Geo-accumulation index - Methyl mercury - Pollution assessment - Reservoir sediments - Total mercuries
Classification code:441.2  Reservoirs - 443.1  Atmospheric Properties - 483  Soil Mechanics and Foundations - 483.1  Soils and Soil Mechanics - 512.1.2  Petroleum Deposits : Development Operations - 524  Solid Fuels - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2  Chemical Reactions - 802.3  Chemical Operations - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
DOI:10.13227/j.hjkx.201609088

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 43>

Accession number:20172703864557
Title:Input and Distribution of Photosynthesized Carbon in Soil-Rice System Affected by Water Management and Nitrogen Fertilization
Authors:Wang, Ting-Ting (1, 2); Zhu, Zhen-Ke (1); Zhu, Han-Hua (1); Tang, Zhen-Zhu (1, 3); Pang, Jing (3); Li, Bao-Zhen (1); Su, Yi-Rong (1); Ge, Ti-Da (1); Wu, Jin-Shui (1)
Author affiliation:(1) Key Laboratory of Subtropical Agriculture Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha; 410125, China; (2) College of Resources and Environment, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Faculty of Resources and Environmental Science, Hubei University, Wuhan; 430062, China
Corresponding author:Zhu, Zhen-Ke(zhuzhenke@isa.ac.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1227-1234
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Fertilizer and water management are two key factors for rice growth. A better understanding of the carbon (C) cycling in paddy soil requires investigation into the input characteristics and distribution dynamics of photosynthesized carbon in rice-soil system. We grew rice (Zhongzao 39) in PVC pots and used the<sup>13</sup>C-CO<inf>2</inf>continuous labeling method to quantify the allocation of photosynthesized carbon in rice-soil system under two regimes (Drying-rewetting vs. continuous watering) and N fertilization (250 mg&middot;kg<sup>-1</sup>vs. no addition). The results showed that nitrogen fertilizer application increased rice shoot biomass and the amount of C and N, but had no significant influence on rice root biomass. Thus, nitrogen fertilizer application decreased rice biomass root/shoot ratio significantly. Drying-rewetting with N fertilizer treatment resulted in higher total C and N amount by 22% and 33%, respectively, in the shoot, and by 36% and 44%, respectively in the root than continuous watering with nitrogen fertilizer treatment. These results indicated that nitrogen fertilizer application promoted the growth of rice shoot. Nitrogen fertilizer application significantly increased the<sup>13</sup>C content in rice shoot by 32%-83% over the control without N addition. Nitrogen fertilizer application also increased the<sup>13</sup>C recovery in rice shoot by 6%-32%, but decreased that in the root by 18%-59%. Pertaining to water effect, drying-rewetting with N application increased the amount of<sup>13</sup>C in rice shoot and root. However, without N addition, the amount and the recovery of<sup>13</sup>C in shoot dropped by 10.3 mg&middot;pot<sup>-1</sup>and 12%, respectively, compared with the continuous watering treatment. The root, on the other hand, recorded increases in both the amount and the recovery of<sup>13</sup>C by 1.9 mg&middot;pot<sup>-1</sup>and 57%, respectively. Furthermore, the deposition of assimilated C into rhizosphere-soil increased by both the individual and the interactive effects of N fertilizer application and drying-rewetting treatment. Thus, combining N fertilizer and drying-rewetting water management led to more increased allocation and deposition of photosynthesized carbon in soil-rice system compared with combined continuous flooding and N application. This study was able to quantify the partitioning and allocation of rice photosynthesized carbon into different plant and soil pools under different water and N fertilizer treatments, and can serve as a useful guide for better water and nutrient management practices in paddy-rice production that can achieve both sustainable high yield and sequestration of more C within the paddy soil system. &copy; 2017, Science Press. All right reserved.
Number of references:42
Main heading:Nitrogen fertilizers
Controlled terms:Biomass - Carbon dioxide - Deposition - Drying - Ecology - Fertilizers - Nitrogen - Recovery - Soils - Water management
Uncontrolled terms:Drying-rewetting - Fertilizer applications - Interactive effect - Nitrogen fertilization - Nutrient management - Rhizodeposition - Rhizosphere soils - Rice
Classification code:454.3  Ecology and Ecosystems - 483.1  Soils and Soil Mechanics - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Percentage 1.20e+01%, Percentage 1.80e+01% to 5.90e+01%, Percentage 2.20e+01%, Percentage 3.20e+01% to 8.30e+01%, Percentage 3.30e+01%, Percentage 3.60e+01%, Percentage 4.40e+01%, Percentage 5.70e+01%, Percentage 6.00e+00% to 3.20e+01%
DOI:10.13227/j.hjkx.201608068

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 44>

Accession number:20172703864519
Title:Characteristics of Spatial Distribution of Bacterial Aerosols Produced by Fountain
Authors:Zhang, Chong-Miao (1); Yuan, Lin (1); Xu, Peng-Cheng (1); Liu, Ke-Xin (1)
Author affiliation:(1) International Science and Technology Cooperation Center for Urban Alternative Water Resources Development, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:911-917
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To illuminate the spatial distribution of bacterial aerosols produced by fountain, sprinkler test was conducted in this study. Escherichia coli NK5449 was used as the test strain, and bacterial aerosols were sampled by Anderson six-stage air sampler at different sites around the sprinkler. The concentration and particle size distribution of bacterial aerosols and the correlation between droplet diameter and bacterial aerosols concentration were analyzed. The results showed that the concentration of bacterial aerosols ranged from (38&plusmn;15) CFU&middot;m<sup>-3</sup>to (676&plusmn;92) CFU&middot;m<sup>-3</sup>in the space of 0.75 m to 1.75 m from the ground and 0.5 m to 3 m away from the sprinkler. The bacterial aerosol concentration decreased along with the increase of the height and the distance between the sampling site and the sprinkler, and had significant negative correlation with droplet diameter (P&lt;0.05). With the increase of the distance to sprinkler, the proportion of bacterial aerosol particles with size of larger than 4.7 &mu;m decreased at first and increased subsequently; while the proportion of bacterial aerosol particles with size between 2.1 and 4.7 &mu;m increased firstly and then decreased. The bacterial aerosol particles mainly existed in the part with size between 1.1 and 4.7 &mu;m at sampling sites more than 0.5 m away from the sprinkler. It indicated that bacterial aerosols with small size may be inhaled by people far away from the fountain, and the risk should not be ignored. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Spatial distribution
Controlled terms:Aerosols - Drops - Escherichia coli - Fountains - Particle size - Particle size analysis - Size distribution
Uncontrolled terms:Air samplers - Andersons - Bacterial aerosols - Droplet diameters - Negative correlation - Sampling site - Six stages
Classification code:921  Mathematics - 922.2  Mathematical Statistics - 951  Materials Science
Numerical data indexing:Size 1.10e-06m to 4.70e-06m, Size 2.10e-06m to 4.70e-06m, Size 4.70e-06m, Size 5.00e-01m3 to 3.00e+00m3, Size 5.00e-01m, Size 7.50e-01m to 1.75e+00m
DOI:10.13227/j.hjkx.201608102

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 45>

Accession number:20172703864539
Title:Biological Toxicity Evaluation of Domestic Wastewater Based on A<sup>2</sup>/O Treatment Processes Using a Battery of Bioassays
Authors:Zhang, Qiu-Ya (1); Ma, Xiao-Yan (1); Wang, Xiao-Chang (1); You, Meng (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an; 710055, China
Corresponding author:Wang, Xiao-Chang(xcwang@xauat.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1084-1092
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In order to accurately evaluate the comprehensive ecotoxicity of domestic wastewater and the toxicity reduction efficiency of different treatment processes, standardized assays focusing on Vibrio fischeri, SOS/umu test and yeast estrogen screen were applied. Simultaneously, male zebrafish was used to address the mode of action of endocrine disrupting effects of wastewater and reclaim water on aquatic life. Results of this study indicated that the influent was severely polluted: highly acute toxicity, genotoxicity and estrogenicity were observed. After the secondary biological treatment, the above toxicities were significantly reduced, making the water quality improved. However, the estrogencity of secondary effluent was detected at 1.89 ng&middot;L<sup>-1</sup>, which still posed potential risk on the aquatic life in receiving water. In addition, the up-regulation of estrogen receptor (esr1) and vitellogenin (vtg1) in the livers of zebrafish was observed after exposure to 2.5 times concentrated wastewaters, which demonstrated that wastewater modulates hormonal activities of aquatic life by disturbing target genes expression. Moreover, the slight down-regulation of esr1 was observed in the gonads. These observations reflect that the evaluation of biological toxic effect should be analyzed in different tissues or organs, so that more comprehensive information about the adverse effects of wastewaters on aquatic life can be obtained. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Biological water treatment
Controlled terms:Biological organs - Effluents - Electric batteries - Gene expression - Gene expression regulation - Toxicity - Wastewater treatment - Water pollution - Water quality
Uncontrolled terms:Domestic wastewater - Estrogenicity - Genotoxicities - Luminescent bacteria - Security level - Zebrafish
Classification code:445.1  Water Treatment Techniques - 445.2  Water Analysis - 452.3  Industrial Wastes - 452.4  Industrial Wastes Treatment and Disposal - 453  Water Pollution - 461  Bioengineering and Biology - 702.1  Electric Batteries
Numerical data indexing:Mass_Density 1.89e-09kg/m3
DOI:10.13227/j.hjkx.201607186

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 46>

Accession number:20172703864547
Title:Effects of Organic Loading Rate on Startup Performance of Anaerobic Digestion with Vinegar Residues
Authors:Dai, Xiao-Hu (1); Yu, Chun-Xiao (1); Li, Ning (1); Dong, Bin (1); Dai, Ling-Ling (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:Li, Ning(lining@tongji.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1144-1150
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Biochemical methane potential experiments were conducted to investigate the effects of organic loading rate on the performance of anaerobic digesters with vinegar residues. According to the comparisons of methane production and liquid phase compositions, as well as thermogravimetry, X-ray Diffraction and infrared spectroscopy analyses, the conclusions could be drawn that: (1) Lower organic loading rate was better to mitigate the accumulation of VFAs and pH decrease during the hydrolysis and acidification of organic matters, which consequently improved methane production. When the inoculum to substrate ratio was 1:1[organic loading rate of 1.78 g&middot;(L&middot;d)<sup>-1</sup>, pH=7.60], the cumulative methane production was the highest, reaching 2249.7 mL, and the performance of the digesters was stable. The VFAs content increased with the increase of the organic loading rate, leading to the suppression and further the stop of methane production. And when the inoculum to substrate ratio was 1:4 [organic loading rate of 7.12 g&middot;(L&middot;d)<sup>-1</sup>, pH=5.52], the simultaneous generation of acetate and lactic acids could be achieved at 8000 mg&middot;L<sup>-1</sup>and 2650 mg&middot;L<sup>-1</sup>, respectively. (2) As vinegar residues were short-range ordered with microcrystalline structure or mainly contained amorphous substances, they were more biodegradable than feedstocks such as corn stalk. During the anaerobic digestion processes, the degradation rates of lignin, cellulose and hemicellulose increased with the decrease of organic loading rate. &copy; 2017, Science Press. All right reserved.
Number of references:25
Main heading:Loading
Controlled terms:Acetic acid - Anaerobic digestion - Cellulose - Degradation - Infrared spectroscopy - Methane - Substrates - Thermogravimetric analysis - Volatile fatty acids - X ray diffraction
Uncontrolled terms:Anaerobic digestion process - Biochemical methane potential - Cellulose and hemicellulose - Hydrolysis and acidifications - Inoculum to substrate ratios - Microcrystalline structures - Organic loading rates - Vinegar residues
Classification code:691.2  Materials Handling Methods - 801  Chemistry - 802.2  Chemical Reactions - 804.1  Organic Compounds - 811.3  Cellulose, Lignin and Derivatives
Numerical data indexing:Mass_Density 2.65e+00kg/m3, Mass_Density 8.00e+00kg/m3, Volume 2.25e-03m3
DOI:10.13227/j.hjkx.201607238

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 47>

Accession number:20172703864513
Title:Characteristics of Reactive VOCs Species During High Haze-Pollution Events in Suburban Area of Shanghai in Winter
Authors:Gao, Shuang (1); Zhang, Kun (1); Gao, Song (2); Xiu, Guang-Li (1); Cheng, Na (1); Pan, Yan (3)
Author affiliation:(1) State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Processes, School of Resources &amp; Environmental Engineering, East China University of Science and Technology, Shanghai; 200237, China; (2) Shanghai Environmental Monitoring Center, Shanghai; 200235, China; (3) Shanghai High School, Shanghai; 200231, China
Corresponding author:Xiu, Guang-Li(xiugl@ecust.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:855-866
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Based on the online measurements of VOCs of high pollution process at the university site in winter, VOCs' characteristics and species at different levels of haze pollution were analyzed. Fifty-five VOCs were detected during sampling. &sum;<inf>55</inf>VOCs concentrations ranged between 25.5&times;10<sup>-9</sup>-1320.3&times;10<sup>-9</sup>(avg&plusmn;SD, 240&times;10<sup>-9</sup>&plusmn;181&times;10<sup>-9</sup>). Toluene and xylene were the major pollutants during high pollution process, the concentrations of which were higher than those of industrial area. The university site shared a similar VOC composition with that of industrial area, which suggested that it might be influenced by the surrounding industries. VOCs species exhibited high concentrations in nighttime while low concentrations in daytime. The ozone concentrations were on the contrary. Aromatic hydrocarbons were predominant with a high percentage of contribution (70.0%) to OFP (ozone formation potential). Alkenes and alkynes were the second highest group (16.7%). The OFP of VOCs was 2078.2&times;10<sup>-9</sup>under the west-south wind direction, about 4 times higher than the value under other wind directions (505.8&times;10<sup>-9</sup>). Aromatic hydrocarbons exhibited a predominant contribution to OFP at different levels of haze pollution in this area, among which, Toluene and xylene contributed more than 50% to OFP. The newest version of EPA PMF model was used to identify the major source of VOCs and evaluate their contributions. Gasoline sources and vehicle exhaust, refinery and petroleum products, solvent use and organic synthetic materials were the identified VOC sources in the study area, contributing 33.1%, 31.5%, 30.5%, and 4.9%, respectively to the &sum;<inf>55</inf>VOCs concentrations. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Air pollution
Controlled terms:Air pollution control - Aromatic compounds - Aromatic hydrocarbons - Hydrocarbons - Organic solvents - Ozone - Pollution - Toluene - Volatile organic compounds - Xylene
Uncontrolled terms:Haze pollutions - Low concentrations - On-line measurement - Ozone concentration - Ozone formation potentials - Photochemical ozone - Synthetic materials - Typical species
Classification code:451  Air Pollution - 451.2  Air Pollution Control - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Percentage 1.67e+01%, Percentage 3.05e+01%, Percentage 3.15e+01%, Percentage 3.31e+01%, Percentage 4.90e+00%, Percentage 7.00e+01%
DOI:10.13227/j.hjkx.201609084

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 48>

Accession number:20171003416416
Title:Impact of biodegradable organic matter on the functional microbe activities in partial nitrification granules
Authors:Wang, Shu-Yong (1); Qian, Fei-Yue (1, 2, 3); Wang, Jian-Fang (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 Key Laboratory of Environmental Science and Engineering, 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:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:269-275
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To explore the short-term impact of biodegradable organic matter on the activities of different functional microbes in autotrophic partial nitrification granular sludge (PNG), the variations of both nitrogen transformation performance and dissolved oxygen (DO) uptake of PNG were investigated in this study, by carrying out successive batch tests with and without the organics stressing. The results showed that the higher the C/N ratio, the lower the specific nitrite accumulation rate of q(NO<inf>2</inf><sup>-</sup>-N). Meanwhile, the increase of heterotrophic bacteria (HeB) activities caused the fast DO uptake by PNG, which could effectively suppress nitrite oxidizing bacteria (NOB) with the low oxygen affinity. When inorganic substrate culture was employed in the following phase, both HeB and NOB showed low activities, with significant increase in q(NO<inf>2</inf><sup>-</sup>-N). In short, the adverse effects of biodegradable organic matter on the performance of PNG system were partially reversible, which could benefit to enhance the advantage of ammonium oxidizing bacteria (AOB) and improve the stability of partial nitrification reaction. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Bacteria
Controlled terms:Biogeochemistry - Biological materials - Dissolved oxygen - Electronic guidance systems - Granulation - Microorganisms - Nitration - Nitrification - Nitrogen oxides - Organic compounds
Uncontrolled terms:Ammonium oxidizing bacteria - Biodegradable organic matter - Functional microbe activities - Heterotrophic bacterias - Nitrite-oxidizing bacteria - Partial nitrification
Classification code:461.2  Biological Materials and Tissue Engineering - 461.9  Biology - 481.2  Geochemistry - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 804.2  Inorganic Compounds
DOI:10.13227/j.hjkx.201607076

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 49>

Accession number:20171003416405
Title:Effects of ph and complexing agents on Sb(V) adsorption onto birnessite and ferrihydrite surface
Authors:Wang, Hua-Wei (1); Li, Xiao-Yue (1); Li, Wei-Hua (1); Sun, Ying-Jie (1)
Author affiliation:(1) School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao; 266033, China
Corresponding author:Sun, Ying-Jie(yjsun1971@126.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:180-187
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Effects of pH and complexing agents on Sb(V) adsorption onto birnessite and ferrihydrite surface were investigated. The results indicated that birnessite and ferrihydrite had strong ability to adsorb Sb(V). The removal efficiencies of Sb(V) by birnessite and ferrihydrite were dependent on the initial pH in solution. The removal efficiency of Sb(V) increased with the decrease of solution pH. At pH 5.0, the removal efficiencies, adsorption rate and adsorption capacity were better than those at pH 7.0 or 9.0. The adsorption process of Sb(V) on birnessite and ferrihydrite could be well described by the pseudo-second-order model. The Langmuir model best described the adsorption behavior of Sb(V) by birnessite and ferrihydrite at pH 5.0. The presence of citric acid or EDTA had significant effect on Sb(V) adsorption onto birnessite and ferrihydrite. &copy; 2017, Science Press. All right reserved.
Number of references:35
Main heading:Adsorption
Controlled terms:Efficiency - pH - Removal
Uncontrolled terms:Adsorption behavior - Adsorption behaviour - Adsorption capacities - Birnessite - Complexing agents - Ferrihydrites - Pseudo-second order model - Removal efficiencies
Classification code:801.1  Chemistry, General - 802.3  Chemical Operations - 913.1  Production Engineering
DOI:10.13227/j.hjkx.201606165

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 50>

Accession number:20171003416403
Title:Pollution level, distribution characteristics and risk assessment of 32 PPCPs in surface water of luomahu lake
Authors:Zhang, Qin (1); Zhang, Sheng-Hu (1); Wang, Zhen (1); Guo, Min (1); Liu, Ji-Ning (1); Shi, Li-Li (1); Gu, Wen (1)
Author affiliation:(1) Key Laboratory of Pesticide Environmental Assessment and Pollution Control of National Environmental Protection, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing; 210042, China
Corresponding author:Liu, Ji-Ning(ljn@nies.org)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:162-169
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A total of 22 water samples collected from Luomahu Lake were determined using high performance liquid chromatography tandem mass spectrometry(HPLC-MS/MS) to evaluate the pollution level, spatial distribution and ecological risk of 32 PPCPs. 23 PPCPs were detected in surface water of Luomahu Lake and the total concentrations of 22 samples were 892-1 536 ng&middot;L<sup>-1</sup>. The concentration of norfloxacin (256-707 ng&middot;L<sup>-1</sup>) was the highest among the detected PPCPs, followed by ketoprofen (85-438 ng&middot;L<sup>-1</sup>), acesulfame (101-290 ng&middot;L<sup>-1</sup>) and naproxen (1.9-112 ng&middot;L<sup>-1</sup>). Spatial differences were found in concentrations of PPCPs in various sampling sites. Concentrations of PPCPs in northeast of Luomahu Lake were higher than those of southwest. Concentration of PPCPs in Fangtinghe River was high and that of Zhangshanzha River was relatively low. The risk assessment of 13 pharmaceutical PPCPs showed that risk quotients(RQs) of norfloxacin were 0.26-0.72, posing medial risk to aquatic ecosystem. Gemifibrozil posed low ecological risks with RQs&gt;0.01 in most sampling sites. RQs of other 11 PPCPs were less than 0.01, posing no ecological risks. The combined risk quotients of 12 PPCPs in water of Luomahu Lake were 0.29-0.75, indicating that those compounds posed an medial risk to aquatic ecosystem. Human health risk assessment showed that the RQs were less than one for 6 selected PPCPs, indicating that these compounds did not appear to pose an appreciable risk to human health by potential environmental exposure from drinking water. &copy; 2017, Science Press. All right reserved.
Number of references:48
Main heading:Risk assessment
Controlled terms:Aquatic ecosystems - Drug products - Ecology - Ecosystems - Health - Health risks - High performance liquid chromatography - Lake pollution - Lakes - Liquid chromatography  - Mass spectrometry - Pollution - Potable water - River pollution - Surface waters - Water - Water pollution
Uncontrolled terms:Distribution characteristics - Ecological risk assessment - Environmental exposure - High-performance liquid chromatography tandem mass spectrometries - Human health risk assessment - Pharmaceuticals and personal care products - Risk to human health - Spatial differences
Classification code:444  Water Resources - 444.1  Surface Water - 453  Water Pollution - 454.3  Ecology and Ecosystems - 461.6  Medicine and Pharmacology - 461.7  Health Care - 801  Chemistry - 914.1  Accidents and Accident Prevention
Numerical data indexing:Mass_Density 1.01e-07kg/m3 to 2.90e-07kg/m3, Mass_Density 1.90e-09kg/m3 to 1.12e-07kg/m3, Mass_Density 2.56e-07kg/m3 to 7.07e-07kg/m3, Mass_Density 8.50e-08kg/m3 to 4.38e-07kg/m3, Mass_Density 8.92e-07kg/m3 to 1.54e-06kg/m3
DOI:10.13227/j.hjkx.201606184

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 51>

Accession number:20171003416407
Title:Effect of dissolved humic acid on thyroid receptor antagonistic activity of zinc in aquatic environment
Authors:Ai, Yang (1); Kong, Dong-Dong (1); Yu, Chang (1); Shen, Yang (1); Li, Jian (1)
Author affiliation:(1) Engineering Research Center of Ground Water Pollution Control and Remediation, College of Water Science, Beijing Normal University, Beijing; 100875, China
Corresponding author:Li, Jian(lijian@bnu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:195-200
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A rapid recombinant human thyroid (hTR) gene yeast bioassay was used to evaluate the effect of dissolved humic acid on thyroid receptor antagonistic activity of ZnCl<inf>2</inf>. The concentration of bio-available zinc after its reaction with dissolved humic acids was measured by anodic stripping voltammetry(ASV). Furthermore, the reaction mechanism of humic acid and zinc was investigated by three-dimensional excitation-emission matrix fluorescence spectroscopy (3DEEM). The results revealed that ZnCl<inf>2</inf>demonstrated strong thyroid receptor antagonistic activity, and the concentration inhibiting 20% of the maximum effect of ZnCl<inf>2</inf>was 1.70&times;10<sup>-5</sup>mol&middot;L<sup>-1</sup>. The thyroid receptor antagonistic activity of ZnCl<inf>2</inf>was reduced by 30%-50% after the reaction of dissolved humic acids. The results of ASV showed that the concentration of bio-available zinc was decreased after the reaction of dissolved humic acids, the result was similar to that of bioassay test. The thyroid receptor antagonistic activity of the mixed solution of humic acid and ZnCl<inf>2</inf>was increased after UV radiation treatment, however it was still lower than the antagonistic activity induced by ZnCl<inf>2</inf>. The results of 3DEEM showed that ZnCl<inf>2</inf>could reduce the fluorescence peak intensity of humic acid, which could intuitively characterize the interaction between humic acid and ZnCl<inf>2</inf>. The above results can provide basic data and theoretical support for zinc toxicity study in aquatic environment and the establishment of water quality criteria for znic. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:Enzyme immobilization
Controlled terms:Bioassay - Biological materials - Dissolution - Fluorescence - Fluorescence spectroscopy - Organic acids - Voltammetry - Water analysis - Water quality - Zinc
Uncontrolled terms:3DEEM - Anodic stripping voltammetry - Antagonistic activity - Excitation-emission matrix fluorescence spectroscopies - Humic acid - Radiation treatments - Thyroid disrupting effects - Water quality criteria
Classification code:445.2  Water Analysis - 461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 546.3  Zinc and Alloys - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 801.4.1  Electrochemistry - 802.3  Chemical Operations - 804.1  Organic Compounds
Numerical data indexing:Percentage 2.00e+01%, Percentage 3.00e+01% to 5.00e+01%
DOI:10.13227/j.hjkx.201605211

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 52>

Accession number:20171003416419
Title:Effect of cadmium on biodegradation of nonylphenol by pseudomonas aeruginosa
Authors:Shi, Guang-Yu (1); Cheng, Yuan-Yuan (1); Shi, Wei-Lin (1)
Author affiliation:(1) College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China
Corresponding author:Shi, Wei-Lin(weilin-shi@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:294-300
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The influence of Cd on the degradation of nonylphenol (NP) by P.aeruginosa SH1 was investigated in this study. The investigation revealed that biomass of the strain was significantly declined with the increase of Cd<sup>2+</sup>concentration. The biomass was declined by 27.1% in the presence of 10 mg&middot;L<sup>-1</sup>Cd<sup>2+</sup>after 24 h. The addition of Cd<sup>2+</sup>had a great influence on adsorption of NP by the strain. As for the effect of living stain, adsorption by P.aeruginosa SH1 cells was stimulated at low concentrations of Cd<sup>2+</sup>(0.5 mg&middot;L<sup>-1</sup>), while inhibited at higher levels(&ge;5 mg&middot;L<sup>-1</sup>). As for inactivation of microbes, adsorption by cells was stimulated at higher concentrations, but was only slightly influenced at low levels. The results showed that the intracellular enzymes had much greater degradation rate than the living cells. Different concentrations of Cd<sup>2+</sup>had different effects on bacteria and intracellular enzyme degradation of NP separately. The degradation efficiency when using intracellular enzymes and bacteria was inhibited at higher levels of Cd<sup>2+</sup>and the intracellular enzyme inhibition was more significant. Degradation by cells was stimulated at low concentrations of Cd<sup>2+</sup>, but no significant impact was found on that by intracellular enzymes. The degradation process of NP by intracellular enzymes of the strain conformed to the first-order kinetic model. The highest reaction rate was achieved when the concentrations of Cd<sup>2+</sup>was 0.5 mg&middot;L<sup>-1</sup>and the half-life of this substrate was 5.5 h. However, the degradation process of NP by the strain did not conform to the first-order kinetic model. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Enzyme inhibition
Controlled terms:Adsorption - Bacteria - Biodegradation - Cells - Cytology - Degradation - Enzyme kinetics - Enzymes - Kinetic parameters - Kinetic theory  - Kinetics - Phenols - Pollution
Uncontrolled terms:Degradation efficiency - Degradation process - Different effects - First-order kinetic models - Intracellular enzyme - Low concentrations - Nonylphenols - Pseudomonas aeruginosa
Classification code:461.2  Biological Materials and Tissue Engineering - 461.8  Biotechnology - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.1  Organic Compounds - 931  Classical Physics; Quantum Theory; Relativity
Numerical data indexing:Mass_Density 5.00e-04kg/m3, Percentage 2.71e+01%, Time 1.98e+04s, Time 8.64e+04s
DOI:10.13227/j.hjkx.201607107

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 53>

Accession number:20171003409567
Title:Straw composts with composite inoculants and their effects on soil carbon and nitrogen contents and enzyme activity
Authors:Nie, Wen-Han (1, 2); Qi, Zhi-Ping (2, 4); Feng, Hai-Wei (2); Sun, Yu-Jing (3); Zhi, Yue-E (2); Zhang, Jin-Zhong (1); Zhang, Dan (2)
Author affiliation:(1) Key Laboratory of Eco-environments in Three Gorges Reservoir Region, College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Key Laboratory of Urban Agriculture (South), School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai; 200240, China; (3) Agro-technical Extension and Service Center of Shanyang Town, Jinshan District, Shanghai; 201518, China; (4) Sino-Singapore Thaisheng Agricultural Demonstration Farm, Shanghai; 202161, China
Corresponding author:Zhang, Jin-Zhong(jzhzhang@swu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:2
Issue date:February 15, 2017
Publication year:2017
Pages:783-791
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:The utilization of straw resources is of great significance to agricultural environmental protection and sustainable agricultural development. Based on the isolated 15 high-efficient cellulose degrading bacteria in the laboratory, the composite inoculants (JFB-1) which can effectively degrade crop straw were screened, and the effects of straw composts with the composite inoculants on soil carbon and nitrogen contents and enzyme activity were studied. The results showed that the composite inoculants could accelerate straw decomposition for 1-2 d during single fermentation period, and the organic matter contents in straw composts reached 403.5-515.1 g&middot;kg<sup>-1</sup>, while the ratio of carbon and nitrogen decreased from 10.53 to 15.30. The pot experiments found that the application effects of rice straw composts were generally better than those of corresponding asparagus straw composts. Compared with the control compost of rice straw, when the application amount of rice straw compost using the composite inoculants was 150 g&middot;kg<sup>-1</sup>, the contents of soil organic matter and total nitrogen increased by 33.5% and 7.3%, and soil urease and cellulase activities increased by 16.7% and 30.8%, respectively. Compared with no fertilization treatment, the application of straw composts could improve soil microbial community structure, and increase microbial diversity indices. When the application amount of rice straw compost using the composite inoculants was 100 g&middot;kg<sup>-1</sup>, the biomass of common Chinese cabbage cultivated for 30 d increased by 46.4% compared to the control compost of rice straw. These results indicated that the composite inoculants have great application potential in straw composts. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Composting
Controlled terms:Agriculture - Biodegradation - Biogeochemistry - Biological materials - Enzyme activity - Enzymes - Microorganisms - Nitrogen - Organic compounds - Soils
Uncontrolled terms:Cellulose degrading bacteria - Organic matter content - Soil enzyme activity - Soil microbial community - Soil microbial community structure - Soil nutrients - Straw composts - Sustainable agricultural development
Classification code:461  Bioengineering and Biology - 481.2  Geochemistry - 483.1  Soils and Soil Mechanics - 804  Chemical Products Generally - 804.1  Organic Compounds - 821  Agricultural Equipment and Methods; Vegetation and Pest Control
Numerical data indexing:Percentage 1.67e+01%, Percentage 3.08e+01%, Percentage 3.35e+01%, Percentage 4.64e+01%, Percentage 7.30e+00%
DOI:10.13227/j.hjkx.201607140

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 54>

Accession number:20171003416402
Title:Comparison of nitrogen and phosphorus uptake and water purification ability of five submerged macrophytes
Authors:Jin, Shu-Quan (1); Zhou, Jin-Bo (1); Bao, Wei-Hong (2); Chen, Jun (3); Li, Dan-Dan (3); Li, Yang (1)
Author affiliation:(1) Ecology and Environment Institute, Ningbo Academy of Agricultural Science, Ningbo; 315040, China; (2) Environmental Protection Research and Design Institute of Ningbo, Ningbo; 315012, China; (3) Ningbo Yima Environmental Biotechnology Co., Ltd., Ningbo; 315000, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:1
Issue date:January 15, 2017
Publication year:2017
Pages:156-161
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Uptake of nitrogen(N) and phosphorus(P) and their purification capacity for five native submerged macrophytes were investigated in laboratory simulated hydrostatic conditions, including Hydrilla verticillata, Vallisneria natans, Ceratophyllum demersum, Myriophyllum spicatum, Potamogeton maackianus. The results indicated that the moisture contents of different submerged macrophytes were almost the same before and after the test,with the range of 89.8%-92.0%. The net accumulated biomass changed from 1.52 g&middot;m<sup>-2</sup>to 12.92 g&middot;m<sup>-2</sup>among different submerged macrophytes, and the highest net accumulated biomass of Hydrilla verticillata was 8.5 times higher than the lowest plant of Potamogeton maackianus. The N and P contents of five submerged macrophytes ranged from 26.54 to 34.44g&middot;kg<sup>-1</sup>and from 2.54 to 4.01g&middot;kg<sup>-1</sup>, respectively, and the N and P contents of Ceratophyllum demersum were relatively high. Total N and P removal efficiency of different submerged macrophyte treatments had ranges of 63.8%-83.1% and 49.2%-70.8%, significantly higher than those of the CK treatment (39.9% and 36.9%), respectively, and the removal efficiency decreased in the order of Hydrilla verticillata&gt;Ceratophyllum demersum&gt;Vallisneria natans&gt;Myriophyllum spicatum&gt;Potamogeton maackianus. Total N and P removal efficiencies of different submerged macrophyte treatments were significantly correlated with net accumulated biomass, with correlation coefficients of 0.994 (P&lt;0.01) and 0.996 (P&lt;0.01). The contribution of direct N and P uptake to different submerged macrophytes had the ranges of 1.5%-13.3% and 2.2%-13.2%, and the synergism contribution (deducting self-purification capacity of water) of different submerged macrophytes ranged 22.5%-29.9% and 10.1%-20.6%, indicating that the synergistic effect of submerged macrophytes purification was much more significant than the direct uptake effect in the process of water purification. &copy; 2017, Science Press. All right reserved.
Number of references:29
Main heading:Purification
Controlled terms:Biomass - Efficiency - Nitrogen - Phosphorus - Removal - Water treatment plants
Uncontrolled terms:Ceratophyllum demersum - Correlation coefficient - Hydrostatic conditions - Myriophyllum spicatum - Nitrogen and phosphorus - Submerged macrophytes - Submerged plants - Water purification
Classification code:445.1  Water Treatment Techniques - 804  Chemical Products Generally - 913.1  Production Engineering
Numerical data indexing:Percentage 1.01e+01% to 2.06e+01%, Percentage 1.50e+00% to 1.33e+01%, Percentage 2.20e+00% to 1.32e+01%, Percentage 2.25e+01% to 2.99e+01%, Percentage 3.69e+01%, Percentage 3.99e+01%, Percentage 4.92e+01% to 7.08e+01%, Percentage 6.38e+01% to 8.31e+01%, Percentage 8.98e+01% to 9.20e+01%
DOI:10.13227/j.hjkx.201606135

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 55>

Accession number:20172603860969
Title:Modeling of Water Quality Response to Land-use Patterns in Taizi River Basin Based on Partial Least Squares
Authors:Li, Lin-Lin (1, 2); Zhang, Yi-Zhang (2); Tang, Chang-Yuan (3); Zheng, Lei (1, 2); Meng, Wei (2); Lu, Shao-Yong (2); Dun, Yu (4)
Author affiliation:(1) College of Water Sciences, Beijing Normal University, Beijing; 100875, China; (2) State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing; 100012, China; (3) College of Environmental Sciences and Engineering, Sun Yat-sen University, Guangzhou; 510275, China; (4) Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Science, Shijiazhuang; 050061, China
Corresponding author:Zhang, Yi-Zhang(zhangyz@craes.org.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1376-1383
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Land use change in river basin is one of the most significant factors that influence river water quality. Based on remote sensing images and river water quality data of Taizi River Basin, partial least squares (PLS) model was applied to explore the relationship between water quality and land use patterns at sub-watershed scale. In this study, PLS model was established by using the percentage of area of land use patterns from seven different sub-watersheds as the variables and the concentrations of four water quality parameters as the observations. The established model was further tested with the data from other sub-watersheds in Taizi River Basin. The results indicated that total nitrogen (TN) and nitrate (NO<inf>3</inf><sup>-</sup>) were significantly associated with land use types in Taizi River Basin with determination coefficient (R<sup>2</sup>) greater than 0.62. As for chloride (Cl<sup>-</sup>) and sulfate (SO<inf>4</inf><sup>2-</sup>), measured values and fitted values had a relatively low fitting precision (R<sup>2</sup>&lt;0.5), which meant land use pattern was not the main factor affecting the concentrations of Cl<sup>-</sup>and SO<inf>4</inf><sup>2-</sup>in river water. Meanwhile, river water quality had a strong correlation with the percentage of area of unused land at the sub-basin scale (influence coefficient &gt;0.24), although unused land area in the Taizi river basin was small. &copy; 2017, Science Press. All right reserved.
Number of references:33
Main heading:Water resources
Controlled terms:Image reconstruction - Land use - Least squares approximations - Nitrates - Rivers - Water quality - Watersheds
Uncontrolled terms:Determination coefficients - Influence coefficient - Land use pattern - Model of water quality - Partial least square (PLS) - Partial least squares models - Taizi rivers - Water quality parameters
Classification code:403  Urban and Regional Planning and Development - 444  Water Resources - 444.1  Surface Water - 445.2  Water Analysis - 804.2  Inorganic Compounds - 921.6  Numerical Methods
DOI:10.13227/j.hjkx.201605109

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 56>

Accession number:20172603861007
Title:Bioaccumulation and Correlation of Heavy Metals in Human Hairs From Urban and Rural Areas of Chongqing
Authors:He, Ming-Jing (1, 2); Li, Qi (1); Wang, Deng-Xiang (1); Zhao, Jia-Yuan (1); Yang, Ting (1)
Author affiliation:(1) College of Resources and Environment, Southwest University, Chongqing; 400715, China; (2) Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing; 400716, China
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1697-1703
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:In the present study, human hair samples were collected in Chongqing to detect the concentrations of heavy metals including Cd, Cu, Ni, Pb and Zn by flame atomic absorption spectrophotometry. Meanwhile, the relationship between the content of heavy metals and age, gender and smoking habits was also analyzed, and the potential sources of the heavy metals in human hair were understood through correlation analysis and principal component analysis. The results showed that the mean concentrations of Cd, Cu, Ni, Pb and Zn were 3.1, 24.3, 9.7, 42.8 and 209.6 &mu;g&middot;g<sup>-1</sup>, respectively in urban areas, while the mean contents were 0.9, 15.8, 5.6, 15.2 and 173.4 &mu;g&middot;g<sup>-1</sup>, respectively in rural area. The residents living in urban areas exhibited significantly higher concentrations than those in rural area, revealing the same heavy metal pattern with that in soils (t-test, P&lt;0.01). No obvious trend was observed between the contents of heavy metals and age, except that the contents of Cu and Zn were increasing with the growth of age. Significantly higher concentrations of Cd and Pb were both observed in male hair and smokers than those in female and non-smokers, respectively in urban and rural areas (P&lt;0.01). Similar correlation patterns among Cd, Cu, Ni and Pb were found both in urban and rural areas. According to principal component analysis, Cu, Ni and Pb contaminations had similar sources in urban areas, whereas Cd, Ni and Pb had similar sources in rural area. &copy; 2017, Science Press. All right reserved.
Number of references:34
Main heading:Copper
Controlled terms:Biochemistry - Cadmium - Correlation methods - Heavy metals - Lead - Metal analysis - Nickel - Pollution - Principal component analysis - Rural areas  - Zinc
Uncontrolled terms:Chongqing - Correlation analysis - Correlation patterns - Flame atomic absorption spectrophotometry - Gender - Hair - Mean concentrations - Urban and rural areas
Classification code:531  Metallurgy and Metallography - 544.1  Copper - 546.1  Lead and Alloys - 546.3  Zinc and Alloys - 548.1  Nickel - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 801.2  Biochemistry - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201610030

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 57>

Accession number:20172603860985
Title:Effect of SRT on Stability of Yeast-SBR in Treating Oil-containing Wastewater
Authors:L&uuml;, Wen-Zhou (1); Zhang, Shu-Lin (1); Qiao, Yu-Xiang (1); Liu, Ying (1)
Author affiliation:(1) College of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo; 315211, China
Corresponding author:Liu, Ying(liuying1@nbu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1513-1519
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Sludge retention time(SRT) is a crucial parameter to influence the stability of biological wastewater treatment systems. Especially, the effects of SRT on yeast-wastewater treatment remain unclear. In this study, mixtures of yeast strains were applied to treat oil-containing wastewater in sequencing batch reactors(SBR) and the effects of sludge retention time(SRT as 5, 10, 20, 40 d) on the removal efficiency of pollutants, contents and composition of extracellular polymeric substances(EPS), yeast cells settleability and yeast communities were investigated. The results showed that the recommended SRT was 5-10 d for the yeast-SBR system; Higher SRT led to decrease of COD removal rate and content of EPS; the tightly-bounded EPS was the major one which consisted of polysaccharides. SRT of 5-40 d had no significant effects on the SVI of yeast cells, however, longer SRT (&gt;20 d) resulted in the increase of mycelial cells and a tendency to produce the filamentous bulking. In the continuous operation of SBR, three extraneous yeast strains capable of utilizing or degrading oil were identified in the systems under the short and long SRT. To conclude, shorter SRT was favorable for the system stability in treating oil-containing wastewater by yeasts. &copy; 2017, Science Press. All right reserved.
Number of references:28
Main heading:Wastewater treatment
Controlled terms:Activated sludge process - Batch reactors - Biological water treatment - Cells - Cytology - Polymers - System stability - Yeast
Uncontrolled terms:Biological waste water treatment - Continuous operation - Extracellular polymeric substances - Filamentous bulking - Mycelial cells - Removal efficiencies - Sequencing batch reactors - Sludge retention time
Classification code:445.1  Water Treatment Techniques - 452.2  Sewage Treatment - 452.4  Industrial Wastes Treatment and Disposal - 461.2  Biological Materials and Tissue Engineering - 802.1  Chemical Plants and Equipment - 815.1  Polymeric Materials - 822.3  Food Products - 961  Systems Science
DOI:10.13227/j.hjkx.201607175

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 58>

Accession number:20172603860990
Title:Effect of Environment Adjustment Layers on Nitrogen Transformation in Anaerobic Bioreactor Landfills
Authors:He, Zheng-Kun (1); Song, Bo-Yu (2, 3); Zhu, Nan-Wen (1); Dong, Jun (3)
Author affiliation:(1) School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (2) Environmental Protection Research Institute of Light Industry, Beijing; 100089, China; (3) Key Laboratory of Groundwater Resources and Environment, College of Environment and Resources, Jilin University, Changchun; 130021, China
Corresponding author:Dong, Jun(dongjun@jlu.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1551-1557
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:To investigate the perennial effect of environment adjustment layers on the interior environment and nitrogen transformation in anaerobic bioreactor landfills, three sets of simulated anaerobic bioreactor landfills and two kinds of environment adjustment layers of mineralized refuse with heavy calcium carbonate (R2) and mineralized refuse with natural zeolites (R3) were designed and established. The degradation and transformation of nitrogen in waste and leachate had been monitored for 390 days. The results showed that, the value orders of pH, alkalinity, oxidation reduction potential and moisture content (MS) were pH(R2)&gt;pH(R3)&gt;pH(R1), alkalinity (R2)&gt;alkalinity (R3)&gt;alkalinity (R1), Eh(R2)&lt;Eh(R3)&lt;Eh(R1) and MS(R3)&gt;MS(R2)&gt;MS(R1). In R1, R2 and R3, the degradation rates of total nitrogen, ammonia nitrogen, nitrate nitrogen in waste were 79.2%, 82.3% and 88.5%, 48.3%, 60.1% and 67.7%, 38.5%, 44.2% and 53.4%, respectively. Concentration comparison results of total nitrogen, ammonia nitrogen and nitrate nitrogen in leachate were TN(R3)&lt;TN(R2)&lt;TN(R1), NH<inf>4</inf><sup>+</sup>-N(R3)&lt;NH<inf>4</inf><sup>+</sup>-N(R1)&lt;NH<inf>4</inf><sup>+</sup>-N(R2) (Chinese Character)NO<inf>3</inf><sup>-</sup>-N(R3)&lt;NO<inf>3</inf><sup>-</sup>-N(R2)&lt;NO<inf>3</inf><sup>-</sup>-N(R1). Additionally, both of mineralized refuse with heavy calcium carbonate and mineralized refuse with natural zeolites could long-term adjust and optimize the interior environment of anaerobic bioreactor landfills for the degradation and conversion of nitrogen. Mineralized waste with natural zeolite could not only promote the degradation and transformation of nitrogen components in waste and leachate, but also control the accumulation of ammonia nitrogen through leachate recirculation. &copy; 2017, Science Press. All right reserved.
Number of references:38
Main heading:Nitrogen
Controlled terms:Alkalinity - Ammonia - Bioconversion - Bioreactors - Calcium - Calcium carbonate - Degradation - Land fill - Leachate treatment - Nitrates  - pH - pH effects - Zeolites
Uncontrolled terms:Anaerobic bioreactors - Effect of environments - Environment adjustment layers - Heavy Calcium Carbonate - Interior environments - Nitrogen transformations - Oxidation reduction potential - Transformation
Classification code:452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 549.2  Alkaline Earth Metals - 801.1  Chemistry, General - 802.1  Chemical Plants and Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally - 804.2  Inorganic Compounds
Numerical data indexing:Age 1.07e+00yr, Percentage 3.85e+01%, Percentage 4.42e+01%, Percentage 4.83e+01%, Percentage 5.34e+01%, Percentage 6.01e+01%, Percentage 6.77e+01%, Percentage 7.92e+01%, Percentage 8.23e+01%, Percentage 8.85e+01%
DOI:10.13227/j.hjkx.201606046

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 59>

Accession number:20172603860966
Title:Catalytic Combustion of Soot Particulates over Rare Earth Pyrochlore Oxides Doped with Transition Metals
Authors:Li, Xi-Feng (1, 2); Sun, Yu-Qi (2); Wang, Zhong-Peng (2); Mu, Zong-Gang (2); Cui, Zhao-Jie (1)
Author affiliation:(1) School of Environmental Science and Engineering, Shandong University, Ji'nan; 250100, China; (2) College of Chemistry and Chemical Engineering, University of Ji'nan, Ji'nan; 250022, China
Corresponding author:Wang, Zhong-Peng(chm_wangzp@ujn.edu.cn)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1348-1356
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Catalytic combustion is an efficient way to remove soot particulates from automobile exhausts. A series of rare earth pyrochlore oxides La<inf>2</inf>Sn<inf>1.8</inf>TM<inf>0.2</inf>O<inf>7</inf>(TM=Sn, Mn, Fe, Co, Cu) were prepared with CTAB-assisted sol-gel method. The products were characterized by XRD,N<inf>2</inf>Adsorption-Desorption, SEM, FT-IR, H<inf>2</inf>-TPR and PL techniques. Their catalytic activity for soot oxidation was investigated by TPO under tight conditions in both O<inf>2</inf>and NO+O<inf>2</inf>atmospheres. After calcination at 900&#8451;, the as-synthesized oxides with pure pyrochlore phase displayed nanospheres with diameter of 30-60 nm and relatively large surface areas. The partial substitution of Sn with transition metals largely influenced the reduction behavior of pyrochlores especially on the low temperature range in H<inf>2</inf>-TPR profiles, which was due to the interactions between Sn and transition metals. The improved oxygen mobility might be derived from the structure defects induced by transition metals doping, which could be helpful in oxidation reactions. In comparison with uncatalyzed reactions, the La<inf>2</inf>Sn<inf>2</inf>O<inf>7</inf>catalyst exhibited modest catalytic activity for soot combustion, while transition metals incorporation further enhanced the activity and selectivity. The improved activity of transition metals doped samples was likely to be associated with the improved reducibility and increased surface oxygen vacancies on the pyrochlore oxides. The presence of NO in the gas phase significantly enhanced the soot oxidation activity, which was due to the promotion effect of NO<inf>2</inf>. Especially, the densities of active oxygen sites and turnover frequency (TOF) values of the catalysts, quantified by isothermal anaerobic titration with soot as a probe molecule, were used to explain the different soot combustion behaviors. Among the pyrochlore oxides, the Co-doped pyrochlore sample displayed the highest ignition activity and the largest intrinsic activity with TOF of 3.20&times;10<sup>-3</sup>s<sup>-1</sup>. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Catalyst activity
Controlled terms:Binary alloys - Catalysis - Catalyst selectivity - Catalysts - Catalytic oxidation - Combustion - Dust - Ionization of gases - Lanthanum alloys - Metals  - Nitrogen compounds - Oxidation - Oxygen - Oxygen vacancies - Rare earths - Sol-gel process - Sol-gels - Soot - Tin - Tin alloys  - Transition metal compounds - Transition metals - Vacancies
Uncontrolled terms:Catalytic combustion - Intrinsic activities - Oxidation reactions - Partial substitution - Pyrochlores - Soot particulates - Surface oxygen vacancies - Uncatalyzed reactions
Classification code:451.1  Air Pollution Sources - 531  Metallurgy and Metallography - 546.2  Tin and Alloys - 547.2  Rare Earth Metals - 802.2  Chemical Reactions - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 812.3  Glass - 933.1  Crystalline Solids
Numerical data indexing:Size 3.00e-08m to 6.00e-08m
DOI:10.13227/j.hjkx.201609228

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 60>

Accession number:20172603860962
Title:Pollution Characteristics of NH<inf>4</inf><sup>+</sup>,NO<inf>3</inf><sup>-</sup>,SO<inf>4</inf><sup>2-</sup>in PM<inf>2.5</inf>and Their Precursor Gases During 2015 in an Urban Area of Beijing
Authors:Ding, Meng-Meng (1); Zhou, Jian-Nan (1); Liu, Bao-Xian (1); Wang, Yan (1); Zhang, Bo-Tao (1); Shi, Ai-Jun (1); Yang, Dong-Yan (1); Chang, Miao (1)
Author affiliation:(1) Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology, Beijing Municipal Environmental Monitoring Center, Beijing; 100048, China
Corresponding author:Liu, Bao-Xian(liubaoxian28@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1307-1316
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Simultaneous measurements of precursor gases NH<inf>3</inf>,NO,NO<inf>2</inf>,SO<inf>2</inf>and the main water-soluble ions in PM<inf>2.5</inf>such as sulphate (SO<inf>4</inf><sup>2-</sup>),nitrate (NO<inf>3</inf><sup>-</sup>) and ammonium (NH<inf>4</inf><sup>+</sup>) (collectively called SNA)were carried out in the urban area of Beijing during 2015-01 to 2015-12,which obtained 325 groups of samples. PTFE membrane filters were used to collect particulate NH<inf>4</inf><sup>+</sup>, NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>, followed by the online instruments to collect precursor gases. The pollution characteristics of the precursor gases and SNA were analyzed and their correlation was studied. The mean concentrations of NH<inf>3</inf>, NO, NO<inf>2</inf>, SO<inf>2</inf>, NH<inf>4</inf><sup>+</sup>,NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>were 21.5, 17.7, 54.3, 14.2, 8.1, 13.5 and 12.7 &mu;g&middot;m<sup>-3</sup>respectively during the period of monitoring, and SNA accounted for 43.4% of PM<inf>2.5</inf>. The concentrations of SO<inf>2</inf>,NO<inf>x</inf>and SNA declined compared to 2014. The concentrations of NO,NO<inf>2</inf>and SO<inf>2</inf>were highest in winter and lowest in summer. The concentration of NH<inf>3</inf>was higher in summer and lower in autumn; The concentration and the percentage of NH<inf>4</inf><sup>+</sup>were stable during the four seasons,both the concentrations and the percentage of NO<inf>3</inf><sup>-</sup>were lowest in summer. The concentrations of SO<inf>4</inf><sup>2-</sup>was highest in winter and the percentage was lowest in summer. The ratio of ([NO<inf>3</inf><sup>-</sup>]+2[SO<inf>4</inf><sup>2-</sup>]) and NH<inf>4</inf><sup>+</sup>was 0.97 during the whole year, showing that anions mainly existed in the form of NO<inf>3</inf><sup>-</sup>and SO<inf>4</inf><sup>2-</sup>. In summer, the ratio of [NO<inf>3</inf><sup>-</sup>]+2[SO<inf>4</inf><sup>2-</sup>] and [NH<inf>4</inf><sup>+</sup>] was slightly higher than 1.0, which was the reason why NO<inf>3</inf><sup>-</sup>was bound to Ca<sup>2+</sup>, Mg<sup>2+</sup>and Na<sup>+</sup>besides NH<inf>4</inf><sup>+</sup>. With the increase of pollution, the mass concentration of precursor gases and SNA increased dramatically, among which NO<inf>x</inf>increased most rapidly, and SO<inf>2</inf>decreased from severe pollution to serious pollution. The contribution rate of NH<inf>4</inf><sup>+</sup>was maintained at a relatively stable level. SO<inf>4</inf><sup>2-</sup>had a higher contribution when the pollution level was lower, whereas the concentration of NO<inf>3</inf><sup>-</sup>was higher than others and contributed most to PM<inf>2.5</inf>in heavy pollution. Heterogeneous transformation on the surface of particulate matter played a more important role in the formation of SO<inf>4</inf><sup>2-</sup>and NO<inf>3</inf><sup>-</sup>. The correlations between NO<inf>3</inf><sup>-</sup>, NO<inf>2</inf>and NO,NH<inf>4</inf><sup>+</sup>and NH<inf>3</inf>,SO<inf>4</inf><sup>2-</sup>and SO<inf>2</inf>were significant at the confidence level of 0.01. SO<inf>4</inf><sup>2-</sup>had negative correlation with SO<inf>2</inf>, and NO<inf>3</inf><sup>-</sup>had positive correlation with NO<inf>2</inf>. Compared with NH<inf>3</inf>, the NH<inf>4</inf><sup>+</sup>concentration was more obviously affected by acid gases NO<inf>2</inf>, SO<inf>2</inf>. &copy; 2017, Science Press. All right reserved.
Number of references:37
Main heading:Gases
Controlled terms:Correlation methods - Nitrogen compounds - Nitrogen oxides - Pollution
Uncontrolled terms:Mass concentration - Mean concentrations - Negative correlation - On-line instruments - Particulate Matter - Positive correlations - Simultaneous measurement - Urban areas
Classification code:804.2  Inorganic Compounds - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 4.34e+01%
DOI:10.13227/j.hjkx.201607005

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 61>

Accession number:20172603860963
Title:Pollution Characteristics of PCDD/Fs in Ambient Air and Exposure Risk Assessment Around a Municipal Solid Waste Incinerator in Beijing
Authors:Qi, Li (1); Ren, Yue (1); Liu, Ai-Min (1); Huang, Ye-Ru (1); Zhao, Zhen (2); Wang, Jiang (2); Li, Hong (2)
Author affiliation:(1) State Environmental Protection Key Laboratory of Dioxin Pollution Control, National Research Center for Environmental Analysis and Measurement, Beijing; 100029, China; (2) Beijing Chaoyang District Environmental Protection Monitoring Station, Beijing; 100125, China
Corresponding author:Huang, Ye-Ru(yrhuang@cneac.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:4
Issue date:April 15, 2017
Publication year:2017
Pages:1317-1326
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Ambient air was sampled and analyzed around a municipal solid waste incinerator (MSWI) in Beijing from April 2014 to January 2015 to investigate the concentrations, profiles and seasonal variations of PCDD/Fs in the region using HRGC-HRMS technique. The mass concentrations and TEQ of 2,3,7,8-substituted PCDD/Fs in the air samples ranged from 8.9 to 140 pg&middot;m<sup>-3</sup>and from 0.11 to 1.8 pg&middot;m<sup>-3</sup>, respectively. The concentration values at 4 sampling sites in haze day in autumn and all 7 sampling sites in winter were higher than the ambient air standard of 0.6 pg&middot;m<sup>-3</sup>for dioxins regulated in Japan. 1,2,3,4,6,7,8-HpCDF and OCDD dominated PCDD/Fs in all the samples for all four seasons with average contribution fractions of 20.5% and 14.0%, respectively, while 2,3,4,7,8-PeCDF was the dominant congener contributing to TEQ (43.3%). The spatial distribution basically exhibited a trend that the concentrations at all sites were comparable and not related to the distances from the source. Seasonal variation showed obviously higher concentration in winter than the other three seasons, which may attribute to the high concentration of ambient particulate matter due to domestic heating and worse atmospheric dispersion that occurred in winter. The homologue and congener profiles of PCDD/Fs in the air samples differed from those of the flue gas emission from the MSWI, consistent with the principle component analysis results. Dioxin inhalation exposure dose estimation showed that the dioxin inhalation exposure risk of residents living in the studied area was at a relatively safe level [0.060-0.224 pg&middot;(kg&middot;d)<sup>-1</sup>]. However, the dioxin inhalation exposure risk in heavily polluted seasons still needs great concerns. &copy; 2017, Science Press. All right reserved.
Number of references:40
Main heading:Municipal solid waste
Controlled terms:Atmospheric movements - Organic pollutants - Principal component analysis - Refuse incinerators - Risk assessment - Risk perception - Solid wastes - Waste incineration
Uncontrolled terms:Ambient air - Inhalation exposure - Municipal solid waste incinerator - PCDD/Fs - Principle component analysis - Seasonal variation
Classification code:443.1  Atmospheric Properties - 452  Municipal and Industrial Wastes; Waste Treatment and Disposal - 452.4  Industrial Wastes Treatment and Disposal - 804.1  Organic Compounds - 914.1  Accidents and Accident Prevention - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.40e+01%, Percentage 2.05e+01%, Percentage 4.33e+01%
DOI:10.13227/j.hjkx.201608147

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 62>

Accession number:20172703864522
Title:Pollution Characteristics and Nitrification and Denitrification Potential of Superficial Sediments from Streams in an Urban-Rural Fringe
Authors:Qin, Ru-Bin (1); Li, Ru-Zhong (1); Gao, Su-Di (2); Zhang, Rui-Gang (3)
Author affiliation:(1) School of Resources and Environmental Engineering, Hefei University of Technology, Hefei; 230009, China; (2) Collage of Civil and Environmental Engineering, Anhui Xinhua University, Hefei; 230088, China; (3) School of Civil Engineering, Hefei University of Technology, Hefei; 230009, China
Corresponding author:Li, Ru-Zhong(Lrz1970@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:936-945
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:From May 2015 to June 2016, seasonal sediment samples were collected from three headwater streams in the urban-rural fringe of Hefei, Chaohu Lake basin, China. The nitrogen pollution characteristics of sediments were preliminarily investigated for the three streams. Three metrics, that is, potential nitrification rate (PNR), areal nitrification rate (ANR) and rate of denitrification were quantitatively determined, and their spatial and temporal variations were discussed subsequently. Moreover, the relationship between PNR, ANR or denitrification rate and a list of environmental factors was discriminated by using partial least-squares regression analysis. Results showed that: (1) Guanzhenhe Distributary was the most polluted stream with a mean content of 4516.39 mg&middot;kg<sup>-1</sup>for TN, which was 2.56 and 1.36 times higher than those of Modian Stream and Taochong Stream, respectively. Similarly, the highest values for NH<inf>4</inf><sup>+</sup>-N and NO<inf>3</inf><sup>-</sup>-N emerged in Guanzhenhe Distributary while the lowest existed in Modian Stream. (2) There were distinct seasonal variations in PNR and ANR, namely, the maximum values emerged in summer, minimum in winter, and almost equivalent in spring and autumn. And the arrangement in order for PNR and ANR was Taochong Stream&gt;Modian Stream&gt;Guanzhenhe Distributary. (3) The mean rate of denitrification in Guanzhenhe Distributary was 10.59 mg&middot;(kg&middot;h)<sup>-1</sup>, which was 3.16 and 1.75 times higher than those in Modian Stream and Taochong Stream, respectively. In addition, both denitrification rate and denitrification activity in summer were higher than those in spring for the three streams. (4) According to the variable importance plot (F<inf>VIP</inf>), ANR, PNR and rate of denitrification were almost all significantly correlated with such physical and chemical factors as pH, OM, NH<inf>4</inf><sup>+</sup>-N, NO<inf>3</inf><sup>-</sup>-N, TN and TP in sediments for the three streams. &copy; 2017, Science Press. All right reserved.
Number of references:32
Main heading:River pollution
Controlled terms:Denitrification - Nitrification - Nitrogen - Pollution - Regression analysis - Rural areas - Sediments
Uncontrolled terms:Nitrification and denitrification - Nitrification rates - Nitrogen pollution - Partial least squares regression analysis - Potential nitrification - Spatial and temporal variation - Superficial sediments - Urban-rural fringes
Classification code:453  Water Pollution - 483  Soil Mechanics and Foundations - 802.2  Chemical Reactions - 804  Chemical Products Generally - 922.2  Mathematical Statistics
DOI:10.13227/j.hjkx.201609096

Database:Compendex
Compilation and indexing terms, Copyright 2017 Elsevier Inc.

<RECORD 63>

Accession number:20172703864559
Title:Response of Soil Nitrifier and Denitrifier Community and Activity to Elevated Atmospheric CO<inf>2</inf>Concentration and Temperature
Authors:Liu, Yuan (1); Wang, Guang-Li (1); Li, Lian-Qing (2); Pan, Gen-Xing (2)
Author affiliation:(1) College of Life Science, Huaibei Normal University, Huaibei; 235000, China; (2) College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing; 210095, China
Corresponding author:Wang, Guang-Li(wanf-3344@163.com)
Source title:Huanjing Kexue/Environmental Science
Abbreviated source title:Huanjing Kexue
Volume:38
Issue:3
Issue date:March 15, 2017
Publication year:2017
Pages:1245-1252
Language:Chinese
ISSN:02503301
CODEN:HCKHDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Elevated atmospheric CO<inf>2&