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151. Phytotoxicity of PFOS and PFOA to Brassica chinensis in different Chinese soils

Author:
Chen, Jingwen,   et al.   ; Zhao, Hongxia; Chen, Chuanbin; Zhang, Xin; Quan, Xie;     Show all 5 Authors
Source:
Ecotoxicology and environmental safety 2011 v.74 no.5 pp. 1343-1347
ISSN:
0147-6513
Subject:
Brassica rapa subsp. chinensis; organic matter; persistent organic pollutants; phytotoxicity; risk assessment; root growth; soil properties
Abstract:
... PFOS and PFOA are potential persistent organic pollutants that have raised many concerns in recent years. Research focusing on phytotoxicity of PFOS and PFOA to higher plants is necessary for their risk assessments. However, few toxicity data exist for PFOS or PFOA and higher plants. Here we investigated phytotoxicity of PFOS and PFOA to Brassica chinensis root growth in six different Chinese soil ...
DOI:
10.1016/j.ecoenv.2011.03.007

152. Adsorption mechanism-based screening of cyclodextrin polymers for adsorption and separation of pesticides from water

Author:
Chen, Jingwen,   et al.   ; Liu, Huihui; Cai, Xiyun; Wang, Yu;     Show all 4 Authors
Source:
Water research 2011 v.45 no.11 pp. 3499-3511
ISSN:
0043-1354
Subject:
adsorbents; adsorption; crosslinking; epichlorohydrins; pesticides; polymers; regression analysis; screening
Abstract:
... A rational screening of cyclodextrin-based polymer (CDP), in terms of the relationship between adsorption potential and adsorbent-adsorbate, was investigated to adsorb and separate pesticides from water. Seven spherical porous CDPs were prepared with onefold or composite cyclodextrin(s) as complex and epichlorohydrin as cross-linking reagent. The adsorption kinetics and isotherms of the polymers t ...
DOI:
10.1016/j.watres.2011.04.004
PubMed:
21529879

153. Assessment of a model of pollution disaster in near-shore coastal waters based on catastrophe theory

Author:
Chen, Jingwen,   et al.   ; Wang, Wenjun; Liu, Suling; Zhang, Shushen;     Show all 4 Authors
Source:
Ecological modelling 2011 v.222 no.2 pp. 307-312
ISSN:
0304-3800
Subject:
algal blooms; coastal water; disasters; environmental assessment; eutrophication; heavy metals; hydrochemistry; industry; models; organic compounds; pollutants; surface water
Abstract:
... In this study, a model for assessing of environmental disasters in near-shore areas was developed using a multi-criteria evaluation method of catastrophe theory. The assessment model involved scenarios of eutrophication, pollution with heavy metals and organic compounds. An evaluation system of the model was composed of seven mesosphere indicators and twenty underlying indicators including water c ...
DOI:
10.1016/j.ecolmodel.2010.09.007

154. Evaluating the interactions of organic compounds with multi-walled carbon nanotubes by self-packed HPLC column and linear solvation energy relationship

Author:
Chen, Jingwen,   et al.   ; Chu, Yingqian; Li, Xuehua; Xie, Hongbin; Fu, Zhiqiang; Yang, Xianhai; Qiao, Xianliang; Cai, Xiyun;     Show all 8 Authors
Source:
Journal of hazardous materials 2013 v.263 pp. 550-555
ISSN:
0304-3894
Subject:
adsorption; carbon nanotubes; energy; equations; heat production; high performance liquid chromatography; organic compounds; pollutants
Abstract:
... Understanding the interactions between organic pollutants and carbon nanotubes (CNTs) is critical for fate assessment of both CNTs and organic pollutants. In this study, the chromatographic approach was introduced based on CNTs as stationary phase for the evaluation of such interactions. The pristine multi-walled carbon nanotubes (MWCNTs) were packed into columns of high-pressure liquid chromatogr ...
DOI:
10.1016/j.jhazmat.2013.10.010

155. Bioaccumulation and trophic transfer of polybrominated diphenyl ethers (PBDEs) in a marine food web from Liaodong Bay, North China

Author:
Chen, Jingwen,   et al.   ; Ma, Xindong; Zhang, Haijun; Yao, Ziwei; Zhao, Xiaofeng; Wang, Longxing; Wang, Zhen; Chen, Jiping;     Show all 8 Authors
Source:
Marine pollution bulletin 2013 v.74 no.1 pp. 110-115
ISSN:
0025-326X
Subject:
bioaccumulation; fish; food chain; food webs; invertebrates; isotopes; nitrogen; polybrominated diphenyl ethers; sampling; seabirds; water pollution; China
Abstract:
... The concentrations of 21 polybrominated diphenyl ethers (PBDEs) congeners were analyzed in organisms within a marine food web collected from the Liaodong Bay, North China. The total concentrations of PBDEs in all samples ranged from 0.87 to 91.4ngg−1 lipid weight (lw). BDE-47 was the predominant congener and had a concentration ranging from 0.30 to 36.1ngg−1lw. The trophic magnification factors (T ...
DOI:
10.1016/j.marpolbul.2013.07.020

156. Removal of inhibitors from lignocellulosic hydrolyzates by vacuum membrane distillation

Author:
Chen, Jingwen,   et al.   ; Zhang, Yaqin; Wang, Yafei; Ji, Xiaosheng; Zhang, Lin; Mi, Xigeng; Huang, He;     Show all 7 Authors
Source:
Bioresource technology 2013 v.144 pp. 680-683
ISSN:
0960-8524
Subject:
acetic acid; distillation; ethanol production; fermentation; furfural; temperature
Abstract:
... In this study, vacuum membrane distillation (VMD) was used to remove two prototypical fermentation inhibitors (acetic acid and furfural) from lignocellulose hydrolyzates. The effect of operating parameters, such as feed temperature and feed velocity, on the removal efficiencies of inhibitors was investigated. Under optimal conditions, more than 98% of furfural could be removed by VMD. However, the ...
DOI:
10.1016/j.biortech.2013.07.021

157. Development of a model for predicting reaction rate constants of organic chemicals with ozone at different temperatures

Author:
Chen, Jingwen,   et al.   ; Li, Xuehua; Zhao, Wenxing; Li, Jing; Jiang, Jingqiu; Chen, Jianji;     Show all 6 Authors
Source:
Chemosphere 2013 v.92 pp. 1029-1034
ISSN:
0045-6535
Subject:
alkenes; alkynes; aromatic compounds; ionization; least squares; linear models; ozone; prediction; primary amines; temperature; troposphere; volatile organic compounds
Abstract:
... To assess the persistence and fate of volatile organic compounds in the troposphere, the rate constants for the reaction with ozone (kO3) are needed. As kO3 values are only available for hundreds of compounds, and experimental determination of kO3 is costly and time-consuming, it is of importance to develop predictive models on kO3. In this study, a total of 379 logkO3 values at different temperat ...
DOI:
10.1016/j.chemosphere.2013.03.040
PubMed:
23601122

158. Molecular dynamics simulations on the interactions of low molecular weight natural organic acids with C₆₀

Author:
Chen, Jingwen,   et al.   ; Sun, Qian; Xie, Hong-Bin; Li, Xuehua; Wang, Zhuang; Sheng, Lianxi;     Show all 6 Authors
Source:
Chemosphere 2013 v.92 no.4 pp. 429-434
ISSN:
0045-6535
Subject:
adsorption; anions; aquatic environment; aromatic acids; carbon; dissolved organic matter; energy; hydrophobic bonding; models; molecular dynamics; molecular weight; nanomaterials; troposphere
Abstract:
... As an important part of dissolved organic matter (DOM), low molecular weight organic acids (LOAs) may play a key role in the process for DOM stabilizing carbon nanomaterials (e.g. C₆₀) suspensions in aquatic environment. In addition, both LOAs and C₆₀ have been detected in the troposphere and therefore have a chance to interact with each other in the gaseous phase. However, the mechanism for LOAs– ...
DOI:
10.1016/j.chemosphere.2013.01.039

159. Distinct Photolytic Mechanisms and Products for Different Dissociation Species of Ciprofloxacin

Author:
Chen, Jingwen,   et al.   ; Wei, Xiaoxuan; Xie, Qing; Zhang, Siyu; Ge, Linke; Qiao, Xianliang;     Show all 6 Authors
Source:
Environmental Science & Technology 2013 v.47 no.9 pp. 4284-4290
ISSN:
1520-5851
Subject:
antibiotics; aquatic environment; ciprofloxacin; dissociation; environmental assessment; hydroxyl radicals; ions; methodology; oxidation; piperazine; pollutants; risk assessment; solar radiation
Abstract:
... As many antibiotics are ionizable and may have different dissociation forms in the aquatic environment, we hypothesized that the different dissociation species have disparate photolytic pathways, products, and kinetics, and adopted ciprofloxacin (CIP) as a case to test this hypothesis. Simulated sunlight experiments and matrix calculations were performed to differentiate the photolytic reactivity ...
DOI:
10.1021/es400425b

160. Uptake of perfluorooctane sulfonate (PFOS) by wheat (Triticum aestivum L.) plant

Author:
Chen, Jingwen,   et al.   ; Zhao, Hongxia; Guan, Yue; Zhang, Guolong; Zhang, Zhou; Tan, Feng; Quan, Xie;     Show all 7 Authors
Source:
Chemosphere 2013 v.91 pp. 139-144
ISSN:
0045-6535
Subject:
Triticum aestivum; environmental factors; exposure duration; food chain; food crops; pH; perfluorocarbons; pollutants; roots; salinity; shoots; soil; sorption; temperature; uptake mechanisms; wheat
Abstract:
... Perfluorooctane sulfonate (PFOS) is a highly persistent organic pollutant which has raised many concerns in recent years. Research focusing on plant uptake of PFOS is very necessary when considering its risk of transfer from soil into food chain. In this work, the uptake of PFOS by wheat (Triticum aestivum L.) which is the most main food crop in northern China, was studied. To predict the kinetic ...
DOI:
10.1016/j.chemosphere.2012.11.036
PubMed:
23245763

161. Effects of substituent position on the interactions between PBDEs/PCBs and DOM

Author:
Chen, JingWen,   et al.   ; Nuerla, AiLiJiang; Qiao, XianLiang; Li, Jing; Zhao, DongMei; Yang, XianHai; Xie, Qing;     Show all 7 Authors
Source:
Chinese science bulletin 2013 v.58 no.8 pp. 884-889
ISSN:
1001-6538
Subject:
dissolved organic matter; humic acids; hydrophobicity; isomers; molecular conformation; pollutants; polybrominated diphenyl ethers; polychlorinated biphenyls
Abstract:
... Dissolved organic matters (DOM) have important influence on the environmental behavior and fate of organic pollutants, therefore rationalization of interaction mechanisms between pollutants and DOM has become a hot topic in the field of environmental studies. In this paper, polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs), widely detected pollutants, were chosen as targe ...
DOI:
10.1007/s11434-012-5464-9

162. Preparation of molecularly imprinted polymer nanoparticles for selective removal of fluoroquinolone antibiotics in aqueous solution

Author:
Chen, Jingwen,   et al.   ; Tan, Feng; Sun, Daming; Gao, Jinsuo; Zhao, Qian; Wang, Xiaochun; Teng, Fei; Quan, Xie;     Show all 8 Authors
Source:
Journal of hazardous materials 2013 v.244-245 pp. 750-757
ISSN:
0304-3894
Subject:
adsorption; antibiotics; aqueous solutions; carbon; enrofloxacin; ionic strength; molecular imprinting; nanoparticles; norfloxacin; ofloxacin; pH; polymers; sarafloxacin; scanning electron microscopy; seawater
Abstract:
... In this study, novel molecularly imprinted polymer nanoparticles (nanoMCN@MIPs) were prepared by covalent grafting of ofloxacin-imprinted polymer onto the surface of mesoporous carbon nanoparticles (MCNs). SEM analyses indicated that the prepared nanoMCN@MIPs were almost uniform, and their geometrical mean diameter was about 230nm. The sorption behaviors of the nanoMCN@MIPs including sorption kine ...
DOI:
10.1016/j.jhazmat.2012.11.003

163. Different photolysis kinetics and photooxidation reactivities of neutral and anionic hydroxylated polybrominated diphenyl ethers

Author:
Chen, Jingwen,   et al.   ; Xie, Qing; Zhao, Hongxia; Qiao, Xianliang; Cai, Xiyun; Li, Xuehua;     Show all 6 Authors
Source:
Chemosphere 2013 v.90 pp. 188-194
ISSN:
0045-6535
Subject:
anions; bromination; energy; equations; half life; ionization; latitude; pH; photolysis; photooxidation; polybrominated diphenyl ethers; risk; risk assessment; solar radiation; surface water
Abstract:
... Hydroxylated polybrominated diphenyl ethers (HO-PBDEs) pose potential ecological risks due to their endocrine disrupting effects and extensive sources. It is of great importance to know their environmental transformation for the purpose of ecological risk assessment. Photodegradation is an important transformation pathway of HO-PBDEs. As HO-PBDEs ionize in natural waters, the photochemical reactiv ...
DOI:
10.1016/j.chemosphere.2012.06.033
PubMed:
22832336

164. Occurrence and Aquatic Ecological Risk Assessment of Typical Organic Pollutants in Water of Yangtze River Estuary

Author:
Chen, Jingwen,   et al.   ; Du, Xu; Li, Xuehua; Luo, Tianlie; Matsuur, Naoki; Kadokami, Kiwao;     Show all 6 Authors
Source:
Procedia Environmental Sciences 2013 v.18 pp. 882-889
ISSN:
1878-0296
Subject:
aquatic environment; computer software; environmental assessment; estuaries; gas chromatography-mass spectrometry; hydrocarbons; palmitates; petroleum; phthalates; pollutants; risk; risk assessment; stearic acid; Yangtze River
Abstract:
... The occurrence and distribution of organic pollutants were investigated and their initial aquatic ecological risks were assessed in water of the Yangtze River Estuary (YRE). A total of 18 samples were collected from South Branch of YRE during the flood season in August 2012. Out of 956 organic compounds, 23 organic pollutants were detected by GC-MS and NAGINATATM software which were dominated by p ...
DOI:
10.1016/j.proenv.2013.04.119

165. Bioaccumulation and elimination kinetics of hydroxylated polybrominated diphenyl ethers (2′-OH-BDE68 and 4-OH-BDE90) and their distribution pattern in common carp (Cyprinus carpio)

Author:
Chen, Jingwen,   et al.   ; Zhao, Hongxia; Zhang, Guolong; Liu, Sisi; Qu, Baocheng; Wang, Yanli; Hu, Dingfei; Jiang, Jingqiu; Quan, Xie;     Show all 9 Authors
Source:
Journal of hazardous materials 2014 v.274 pp. 16-23
ISSN:
0304-3894
Subject:
Cyprinus carpio; animal models; bioaccumulation; carp; exposure duration; half life; humans; kidneys; liver; muscles; pharmacokinetics; polybrominated diphenyl ethers; tissue distribution; wildlife
Abstract:
... Hydroxylated polybrominated diphenyl ethers (OH-PBDEs) have attracted wide concerns due to their toxicities and universal presence in wildlife and humans. The relatively high Kow values of OH-PBDEs imply these compounds may have a significant bioaccumulation potential, but so far, the existing data provide little information regarding the kinetics of uptake and depuration in any organisms. Here we ...
DOI:
10.1016/j.jhazmat.2014.03.058

166. A practical approach to determine dose metrics for nanomaterials

Author:
Chen, Jingwen,   et al.   ; Delmaar, Christiaan J.E.; Peijnenburg, Willie J.G.M.; Oomen, Agnes G.; de Jong, Wim H.; Sips, Adriënne J.A.M.; Wang, Zhuang; Park, Margriet V.D.Z.;     Show all 8 Authors
Source:
Environmental toxicology and chemistry 2015 v.34 no.5 pp. 1015-1022
ISSN:
0730-7268
Subject:
chemical composition; in vivo studies; nanosilver; particle size; silica; silver; surface area; toxicity; toxicity testing
Abstract:
... Traditionally, administered mass is used to describe doses of conventional chemical substances in toxicity studies. For deriving toxic doses of nanomaterials, mass and chemical composition alone may not adequately describe the dose, because particles with the same chemical composition can have completely different toxic mass doses depending on properties such as particle size. Other dose metrics s ...
DOI:
10.1002/etc.2878

167. Enhancement of hexavalent chromium reduction and electricity production from a biocathode microbial fuel cell

Author:
Chen, Jingwen,   et al.   ; Huang, Liping; Quan, Xie; Yang, Fenglin;     Show all 4 Authors
Source:
Bioprocess and biosystems engineering 2010 v.33 no.8 pp. 937-945
ISSN:
1615-7591
Subject:
bacteria; bioremediation; chromium; electricity; inoculum; microbial fuel cells; surface area
Abstract:
... Enhancement of Cr (VI) reduction rate and power production from biocathode microbial fuel cells (MFCs) was achieved using indigenous bacteria from Cr (VI)-contaminated site as inoculum and MFC architecture with a relatively large cathode-specific surface area of 340-900 m² m⁻³. A specific Cr (VI) reduction rate of 2.4 ± 0.2 mg g⁻¹VSS h⁻¹ and a power production of 2.4 ± 0.1 W m⁻³ at a current densi ...
DOI:
10.1007/s00449-010-0417-7
PubMed:
20217142

168. Direct Chiral Resolution of Metalaxyl and Metabolite Metalaxyl Acid in Aged Mobile Phases: The Role of Trace Water

Author:
Chen, Jingwen,   et al.   ; Zhang, Xiaoxiang; Xia, Tingting; Huang, Liping; Cai, Xiyun;     Show all 5 Authors
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 5004–5010
ISSN:
0021-8561
Subject:
stereoisomers; metalaxyl; metabolites; acids; phase transition; pollutants; pesticides; pesticide residues
Abstract:
... The separation of chiral transformation products greatly complements the understanding of the stereochemistry of chiral pollutants. In this study, direct enantiomeric resolution of metalaxyl and its main degradation product metalaxyl acid, often co-occurring in the environment, was carried out in normal-phase high-performance liquid chromatography with a Chiralcel OJ-H column. (R)-Metalaxyl acid a ...
DOI:
10.1021/jf9044342
PubMed:
20302379

169. A microbial fuel cell-electro-oxidation system for coking wastewater treatment and bioelectricity generation

Author:
Chen, Jingwen,   et al.   ; Huang, Liping; Yang, Xianhai; Quan, Xie; Yang, Fenglin;     Show all 5 Authors
Source:
Journal of chemical technology and biotechnology 2010 v.85 no.5 pp. 621-627
ISSN:
0268-2575
Subject:
bioelectricity; chemical oxygen demand; coal; electrodes; energy efficiency; nitrogen content; pollutants; wastewater; wastewater treatment
Abstract:
... BACKGROUND: Coking wastewater is generated from coal coking, coal gas purification, and by-product recovery processes. Increased interest is being focused on finding more sustainably effective and energy-efficient methods for treating this wastewater. In this work, a system termed microbial fuel cell-electro-oxidation (MFC-EO) was developed for simultaneous coking wastewater treatment and bioelect ...
DOI:
10.1002/jctb.2320

170. Global Liver Proteome Analysis Using iTRAQ Labeling Quantitative Proteomic Technology to Reveal Biomarkers in Mice Exposed to Perfluorooctane Sulfonate (PFOS)

Author:
Chen, Jingwen,   et al.   ; Tan, Feng; Jin, Yihe; Liu, Wei; Quan, Xie; Liang, Zhen;     Show all 6 Authors
Source:
Environmental Science & Technology 2012 v.46 no.21 pp. 12170-12177
ISSN:
1520-5851
Subject:
acyl coenzyme A; aldehyde dehydrogenase; apolipoprotein A-I; biomarkers; body weight; cysteine; cytochrome P-450; dose response; gene ontology; glutathione transferase; lipid metabolism; liver; long-chain-fatty-acid-CoA ligase; mice; perfluorooctane sulfonic acid; proteome; proteomics; xenobiotics
Abstract:
... Proteomic analysis allows detection of changes of proteins expression in organisms exposed to environmental pollutants, leading to the discovery of biomarkers of exposure and understanding of the action mechanism of toxicity. In the present study, we applied iTRAQ labeling quantitative proteomic technology for global characterization of the liver proteome in mice exposed to perfluorooctane sulfona ...
DOI:
10.1021/es3027715

171. Development of an Agricultural Biotechnology Crop Product: Testing from Discovery to Commercialization

Author:
Chen, Jingwen,   et al.   ; Privalle, Laura S.; Clapper, Gina; Hunst, Penny; Spiegelhalter, Frank; Zhong, Cathy X.;     Show all 6 Authors
Source:
Journal of agricultural and food chemistry 2012 v.60 no.41 pp. 10179-10187
ISSN:
1520-5118
Subject:
agricultural biotechnology; commercialization; crops; foods; genes; markets; transgenic plants
Abstract:
... “Genetically modified” (GM) or “biotech” crops have been the most rapidly adopted agricultural technology in recent years. The development of a GM crop encompasses trait identification, gene isolation, plant cell transformation, plant regeneration, efficacy evaluation, commercial event identification, safety evaluation, and finally commercial authorization. This is a lengthy, complex, and resource ...
DOI:
10.1021/jf302706e
PubMed:
23003210

172. Aquatic toxicity of nanosilver colloids to different trophic organisms: Contributions of particles and free silver ion

Author:
Chen, Jingwen,   et al.   ; Wang, Zhuang; Li, Xuehua; Shao, Jianping; Peijnenburg, Willie J.G.M.;     Show all 5 Authors
Source:
Environmental toxicology and chemistry 2012 v.31 no.10 pp. 2408-2413
ISSN:
0730-7268
Subject:
Danio rerio; Selenastrum capricornutum; colloids; fish larvae; freshwater fish; ions; silver; toxicity; trophic relationships
Abstract:
... The wide uses of nanosilver (nAg) have resulted in concerns regarding ecotoxicity to aquatic organisms. Some previous studies have found that the toxicity of nAg is due to the nanoparticles themselves, while others have found that ionic silver (Ag+) released by nAg particles plays an important role. In the present study, the authors quantitatively evaluated the relative contribution of nAg particl ...
DOI:
10.1002/etc.1964
PubMed:
22865635

173. Polybrominated diphenyl ethers in soils of the modern Yellow River Delta, China: Occurrence, distribution and inventory

Author:
Chen, Jingwen,   et al.   ; Chen, Chang’er; Zhao, Hongxia; Qiao, Xianliang; Xie, Qing; Zhang, Yifei;     Show all 6 Authors
Source:
Chemosphere 2012 v.88 no.7 pp. 791-797
ISSN:
0045-6535
Subject:
biphenyl; ethers; inventories; organic matter; rivers; sediments; soil; China; Yellow River
Abstract:
... The Yellow River is the second largest river in China. In this study, the levels of polybrominated diphenyl ethers (PBDEs) in the modern Yellow River Delta (mYRD) were firstly reported. Twenty PBDE congeners in soil/sediment samples from mYRD were measured. The total PBDE concentrations ranged from non-detectable to 18257ngkg⁻¹ with a mean value of 836ngkg⁻¹. BDE-209 was the dominant congener, acc ...
DOI:
10.1016/j.chemosphere.2012.03.084
PubMed:
22546626

174. Insights into aquatic toxicities of the antibiotics oxytetracycline and ciprofloxacin in the presence of metal: Complexation versus mixture

Author:
Chen, Jingwen,   et al.   ; Zhang, Yu; Cai, Xiyun; Lang, Xianming; Qiao, Xianliang; Li, Xuehua;     Show all 6 Authors
Source:
Environmental pollution 2012 v.166 pp. 48-56
ISSN:
0269-7491
Subject:
cadmium; ciprofloxacin; copper; heavy metals; oxytetracycline; risk; spectroscopy; toxicity; zinc
Abstract:
... Co-contamination of ligand-like antibiotics (e.g., tetracyclines and quinolones) and heavy metals prevails in the environment, and thus the complexation between them is involved in environmental risks of antibiotics. To understand toxicological significance of the complex, effects of metal coordination on antibiotics' toxicity were investigated. The complexation of two antibiotics, oxytetracycline ...
DOI:
10.1016/j.envpol.2012.03.009
PubMed:
22475550

175. An electrochemically enhanced solid-phase microextraction approach based on molecularly imprinted polypyrrole/multi-walled carbon nanotubes composite coating for selective extraction of fluoroquinolones in aqueous samples

Author:
Chen, Jingwen,   et al.   ; Liu, Xue; Wang, Xiaochun; Tan, Feng; Zhao, Hongxia; Quan, Xie; Li, Lianjun;     Show all 7 Authors
Source:
Analytica chimica acta 2012 v.727 pp. 26-33
ISSN:
0003-2670
Subject:
antibiotics; carbon nanotubes; coatings; desorption; detection limit; electrochemistry; electrodes; electrophoresis; fluoroquinolones; high performance liquid chromatography; hydrogen bonding; ion exchange; ionic strength; ions; molecular imprinting; nanocomposites; pH; soil sampling; solid phase microextraction; solvents; urine
Abstract:
... In this study, an electrochemically enhanced solid-phase microextraction (EE-SPME) approach based on molecularly imprinted polypyrrole/multi-walled carbon nanotubes (MIPPy/MWCNTs) composite coating on Pt wire was developed for selective extraction of fluoroquinolone antibiotics (FQs) in aqueous samples. During the extraction, a direct current potential was applied to the MIPPy/MWCNTs/Pt fiber as w ...
DOI:
10.1016/j.aca.2012.03.054

176. Computational Toxicological Investigation on the Mechanism and Pathways of Xenobiotics Metabolized by Cytochrome P450: A Case of BDE-47

Author:
Chen, Jingwen,   et al.   ; Wang, Xingbao; Wang, Yong; Ma, Yuqin; Zhou, Jing; Fu, Zhiqiang;     Show all 6 Authors
Source:
Environmental Science & Technology 2012 v.46 no.9 pp. 5126-5133
ISSN:
1520-5851
Subject:
biotransformation; bromides; chemical elements; cytochrome P-450; enzymes; epoxides; hydroxylation; metabolites; methodology; models; polybrominated diphenyl ethers; risk assessment; xenobiotics
Abstract:
... Understanding the transformation mechanism and products of xenobiotics catalyzed by cytochrome P450 enzymes (CYPs) is vital to risk assessment. By density functional theory computation with the B3LYP functional, we simulated the reaction of 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) catalyzed by the active species of CYPs (Compound I). The enzymatic and aqueous environments were simulated by the ...
DOI:
10.1021/es203718u

177. Application of a level IV fugacity model to simulate the long-term fate of hexachlorocyclohexane isomers in the lower reach of Yellow River basin, China

Author:
Chen, Jingwen,   et al.   ; Ao, Jiangting; Tian, Fulin; Cai, Xiyun;     Show all 4 Authors
Source:
Chemosphere 2009 v.74 no.3 pp. 370-376
ISSN:
0045-6535
Subject:
HCH (pesticide); insecticide residues; environmental fate; pesticide persistence; simulation models; longitudinal studies; soil pollution; polluted soils; isomers; chemical concentration; atmospheric deposition; losses from soil; agricultural runoff; water pollution; surface water; rivers; China; Yellow River
DOI:
10.1016/j.chemosphere.2008.09.085
PubMed:
18996560

178. Investigating soil moisture sensitivity to precipitation and evapotranspiration errors using SiB2 model and ensemble Kalman filter

Author:
Chen, Jingwen,   et al.   ; Fu, Xiaolei; Yu, Zhongbo; Luo, Lifeng; Lü, Haishen; Liu, Di; Ju, Qin; Yang, Tao; Xu, Feng; Gu, Huanghe; Yang, Chuanguo; Wang, Ting;     Show all 12 Authors
Source:
Stochastic environmental research and risk assessment 2014 v.28 no.3 pp. 681-693
ISSN:
1436-3240
Subject:
biosphere; evapotranspiration; good agricultural practices; hydrologic models; soil water; watersheds; weather forecasting; China
Abstract:
... Accurate soil moisture information is useful in agricultural practice, weather forecasting, and various hydrological applications. Although land surface modeling provides a viable approach to simulating soil moisture, many factors such as errors in the precipitation can affect the accuracy of soil moisture simulations. This paper examined how precipitation rate and evapotranspiration rate affect t ...
DOI:
10.1007/s00477-013-0781-3

179. Differential enantioselectivity of quizalofop ethyl and its acidic metabolite: Direct enantiomeric separation and assessment of multiple toxicological endpoints

Author:
Chen, Jingwen,   et al.   ; Zhang, Xiaoxiang; Wang, Se; Wang, Yu; Xia, Tingting; Cai, Xiyun;     Show all 6 Authors
Source:
Journal of hazardous materials 2011 v.186 no.1 pp. 876-882
ISSN:
0304-3894
Subject:
stereoisomerism; membrane permeability; freshwater; risk; enantiomers; pesticide application; quizalofop; chromatography; metabolites; propionates; cell membranes; membrane potential
Abstract:
... Transformation products usually differ in environmental and toxicological properties compared to the parent contaminants, thus causing potential and unknown environmental risks. To elucidate differential chiral recognition of the aryloxypropanoate herbicide quizalofop ethyl (QE) and its primary product (quizalofop acid, QA), their enantiomeric separation and toxicological impacts to two freshwater ...
DOI:
10.1016/j.jhazmat.2010.11.081

180. Selective detection of nanomolar Cr(vi) in aqueous solution based on 1,4-dithiothreitol functionalized gold nanoparticles

Author:
Chen, Jingwen,   et al.   ; Tan, Feng; Liu, Xue; Quan, Xie; Li, Xiaona; Zhao, Hongxia;     Show all 6 Authors
Source:
Analytical methods 2011 v.3 no.2 pp. 343-347
ISSN:
1759-9679
Subject:
absorbance; aqueous solutions; carcinogenicity; chromium; colorimetry; detection limit; metal ions; mutagens; nanogold; pH; signal-to-noise ratio; surface plasmon resonance; transmission electron microscopy; ultraviolet-visible spectroscopy; zeta potential
Abstract:
... The determination of trace Cr(vi) is very important because of its highly carcinogenic and mutagenic effects. In this study, a colorimetric detection method based on 1,4-dithiothreitol functionalized gold nanoparticles (DTT-AuNPs) for nanomolar Cr(vi) in aqueous solution is reported. The method principle was based on the aggregation of DTT-AuNPs induced by Cr(vi), which led to red-shift of the sur ...
DOI:
10.1039/c0ay00534g

181. Discriminating Multiple Impacts of Biogas Residues Amendment in Selectively Decontaminating Chloroacetanilide Herbicides

Author:
Chen, Jingwen,   et al.   ; Cai, Xiyun; Niu, Lili; Zhang, Yu; Lang, Xianming; Yu, Yunlong;     Show all 6 Authors
Source:
Journal of agricultural and food chemistry 2011 v.59 no.20 pp. 11177-11185
ISSN:
0021-8561
Subject:
acetochlor; adsorption; biodiversity; biogas; butachlor; decontamination; dissolved organic carbon; dissolved organic nitrogen; fertilizers; herbicidal properties; metolachlor; microbial activity; organic wastes; pesticide persistence; phosphorus; soil; soil microorganisms; soil nutrients
Abstract:
... There is increasing concern about modifications to pesticide persistence in soil from the application of organic wastes as fertilizers. This study was conducted to discriminate the multiple effects of biogas residues (BR) amendment, including soil nutrients, soil microbial activity and biodiversity, and adsorption and degradation of chloroacetanilide herbicides (acetochlor, metolachlor, and butach ...
DOI:
10.1021/jf202322p
PubMed:
21928820

182. Evaluation of a novel microextraction technique for aqueous samples: Porous membrane envelope filled with multiwalled carbon nanotubes coated with molecularly imprinted polymer

Author:
Chen, Jingwen,   et al.   ; Tan, Feng; Deng, Minjie; Liu, Xue; Zhao, Hongxia; Li, Xiaona; Quan, Xie;     Show all 7 Authors
Source:
Journal of separation science 2011 v.34 no.6 pp. 707-715
ISSN:
1615-9306
Subject:
carbon nanotubes; detection limit; liquid chromatography; methanol; microextraction; milk; mixing; pH; prometryn; river water; salt concentration; toluene; wastewater
Abstract:
... A novel microextraction technique based on membrane-protected multiwalled carbon nanotubes coated with molecularly imprinted polymer (MWCNTs-MIP) was developed. In this technique, MWCNTs-MIP were packed inside a polypropylene membrane envelope, which was then clamped onto a paper clip. For extraction, the packed membrane envelope was first impregnated with toluene and then placed in sample solutio ...
DOI:
10.1002/jssc.201000791
PubMed:
21312332

183. A Review of the Properties and Processes Determining the Fate of Engineered Nanomaterials in the Aquatic Environment

Author:
Chen, Jingwen,   et al.   ; Peijnenburg, Willie J. G. M.; Baalousha, Mohammed; Chaudry, Qasim; Von der kammer, Frank; Kuhlbusch, Thomas A. J.; Lead, Jamie; Nickel, Carmen; Quik, Joris T. K.; Renker, Mareile; Wang, Zhuang; Koelmans, Albert A.;     Show all 12 Authors
Source:
Critical reviews in environmental science and technology 2015 v.45 no.19 pp. 2084-2134
ISSN:
1547-6537
Subject:
aquatic environment; carbon nanotubes; case studies; environmental factors; freshwater; iron oxides; monitoring; oxides; risk assessment; toxicity
Abstract:
... Proper understanding of the basic processes and specific properties of engineered nanomaterials (NMs) that modify the fate and effects of NMs is crucial for NM-tailored risk assessment. This in turn requires developers of NMs and for regulators to consider the most important parameters governing the properties, behavior and toxicity of NMs. As fate and effect studies are commonly performed in labo ...
DOI:
10.1080/10643389.2015.1010430

184. Ball Milling Pretreatment of Corn Stover for Enhancing the Efficiency of Enzymatic Hydrolysis

Author:
Chen, Jingwen,   et al.   ; Lin, Zengxiang; Huang, He; Zhang, Hongman; Zhang, Lin; Yan, Lishi;     Show all 6 Authors
Source:
Applied biochemistry and biotechnology 2010 v.162 no.7 pp. 1872-1880
ISSN:
0273-2289
Subject:
ammonia; biomass; calcium; corn stover; delignification; digestion; dry milling; endo-1,4-beta-glucanase; enzymatic hydrolysis; ethanol; ethanol production; feedstocks; fermentation; glucose; grinding; hydrochloric acid; hydrolysis; particle size; raw materials; sodium hydroxide; steel; wet milling; xylanases; xylose
Abstract:
... Ethanol can be produced from lignocellulosic biomass with the usage of ball milling pretreatment followed by enzymatic hydrolysis and fermentation. The sugar yields from lignocellulosic feed stocks are critical parameters for ethanol production process. The research results from this paper indicated that the yields of glucose and xylose were improved by adding any of the following dilute chemical ...
DOI:
10.1007/s12010-010-8965-5
PubMed:
20593309

185. Toxicity profile of labile preservative bronopol in water: The role of more persistent and toxic transformation products

Author:
Chen, Jingwen,   et al.   ; Cui, Na; Zhang, Xiaoxiang; Xie, Qing; Wang, Se; Huang, Liping; Qiao, Xianliang; Li, Xuehua; Cai, Xiyun;     Show all 9 Authors
Source:
Environmental pollution 2011 v.159 no.2 pp. 609-615
ISSN:
0269-7491
Subject:
pesticides; risk; toxic substances; toxicity
Abstract:
... Transformation products usually differ in environmental behaviors and toxicological properties from the parent contaminants, and probably cause potential risks to the environment. Toxicity evolution of a labile preservative, bronopol, upon primary aquatic degradation processes was investigated. Bronopol rapidly hydrolyzed in natural waters, and primarily produced more stable 2-bromo-2-nitroethanol ...
DOI:
10.1016/j.envpol.2010.09.036
PubMed:
21035931

186. Inclusion Complex of Butachlor with β-Cyclodextrin: Characterization, Solubility, and Speciation-Dependent Adsorption

Author:
Chen, Jingwen,   et al.   ; Bian, Haitao; Cai, Xiyun; Liu, Ping; Liu, Huihui; Qiao, Xianliang; Huang, Liping;     Show all 7 Authors
Source:
Journal of agricultural and food chemistry 2009 v.57 no.16 pp. 7453-7458
ISSN:
0021-8561
Subject:
butachlor; cyclodextrins; chemical structure; chemical speciation; adsorption; soil chemistry; application rate; herbicides; solubility; stoichiometry; chemical reactions; chemical concentration; pesticide formulations
Abstract:
... Due to soil adsorption, higher amounts of the herbicide butachlor are necessary to achieve its herbicidal activity, hence increasing its environmental risks. In this study, the effects of β-cyclodextrin (β-CD) on solubility and soil adsorption of butachlor were investigated. Formation of a 1:1 stoichiometric inclusion complex between them with an apparent stability constant of 443 L mol-1 was conf ...
DOI:
10.1021/jf9013422

187. Dechlorination of chloroacetanilide herbicides by plant growth regulator sodium bisulfite

Author:
Chen, Jingwen,   et al.   ; Bian, Haitao; Cai, Xiyun; Liu, Ping; Wang, Ying; Huang, Liping; Qiao, Xianliang; Hao, Ce;     Show all 8 Authors
Source:
Water research 2009 v.43 no.14 pp. 3566-3574
ISSN:
0043-1354
Subject:
herbicides; dechlorination; sodium bisulfite; plant growth substances; groundwater contamination; surface water; water pollution; alachlor; acetochlor; metolachlor; pH; temperature; kinetics; mass spectrometry; chlorine; Chlorophycota; phytotoxicity; wastewater treatment; China
DOI:
10.1016/j.watres.2009.05.002
PubMed:
19520412

188. Combined Experimental and Theoretical Study on Photoinduced Toxicity of an Anthraquinone Dye Intermediate to Daphnia Magna

Author:
Chen, Jingwen,   et al.   ; Wang, Ying; Lin, Jing; Wang, Zhen; Bian, Haitao; Cai, Xiyun; Hao, Ce;     Show all 7 Authors
Source:
Environmental toxicology and chemistry 2009 v.28 no.4 pp. 846-852
ISSN:
0730-7268
Subject:
water pollution; anthraquinones; dyes; acute toxicity; phototoxicity; solar radiation; reaction kinetics; Daphnia magna; aquatic arthropods; reactive oxygen species; electron transfer
Abstract:
... The toxicity of chemicals can be enhanced by light through two photochemical pathways: Photomodification to more toxic substances and photosensitization. In the present study, the reactive oxygen species (ROS) mechanism for photoinduced acute toxicity of 1-amino-2,4-dibromoanthraquinone (ADBAQ) to Daphnia magna was clarified by experiment and theoretical calculation. The results of the present stu ...
DOI:
10.1897/08-256R.1
PubMed:
19391687

189. Dilute sulfuric acid cycle spray flow-through pretreatment of corn stover for enhancement of sugar recovery

Author:
Chen, Jingwen,   et al.   ; Yan, Lishi; Zhang, Hongman; Lin, Zengxiang; Jin, Qiang; Jia, Honghua; Huang, He;     Show all 7 Authors
Source:
Bioresource technology 2009 v.100 no.5 pp. 1803-1808
ISSN:
0960-8524
Subject:
corn stover; sulfuric acid; sugars; xylose; lignin; cellulose; lignocellulose; biomass; cellulases
Abstract:
... A cycle spray flow-through reactor was designed and used to pretreat corn stover in dilute sulfuric acid medium. The dilute sulfuric acid cycle spray flow-through (DCF) process enhanced xylose sugar yields and cellulose digestibility while increasing the removal of lignin. Within the DCF system, the xylose sugar yields of 90-93% could be achieved for corn stover pretreated with 2% (w/v) dilute sul ...
DOI:
10.1016/j.biortech.2008.10.001
PubMed:
19014881

190. Development and assessment of quantitative structure-activity relationship models for bioconcentration factors of organic pollutants

Author:
Chen, JingWen,   et al.   ; Qin, Hong; Wang, Ying; Wang, Bin; Li, XueHua; Li, Fei; Wang, YaNan;     Show all 7 Authors
Source:
Chinese science bulletin 2009 v.54 no.4 pp. 628-634
ISSN:
1001-6538
Subject:
bioaccumulation; correlation; energy; fish; least squares; models; molecular weight; organic compounds; pollutants; quantitative structure-activity relationships; risk assessment; variance
Abstract:
... Bioconcentration factors (BCFs) are of great importance for ecological risk assessment of organic chemicals. In this study, a quantitative structure-activity relationship (QSAR) model for fish BCFs of 8 groups of compounds was developed employing partial least squares (PLS) regression, based on linear solvation energy relationship (LSER) theory and theoretical molecular structural descriptors. The ...
DOI:
10.1007/s11434-009-0053-2

191. Mechanism-Based Quantitative Structure-Activity Relationships on Toxicity of Selected Herbicides to Chlorella vulgaris and Raphidocelis subcapitata

Author:
Chen, Jingwen,   et al.   ; Ding, Guanghui; Li, Xue; Zhang, Fan; Huang, Liping; Qiao, Xianliang;     Show all 6 Authors
Source:
Bulletin of environmental contamination and toxicology 2009 v.83 no.4 pp. 520-524
ISSN:
0007-4861
Subject:
Chlorella vulgaris; Selenastrum capricornutum; acetolactate synthase; electron transfer; herbicides; photosynthesis; quantitative structure-activity relationships; toxicity
Abstract:
... Four quantitative structure-activity relationships were developed for toxicity of selected photosynthesis (PHS) inhibitors and acetolactate synthase (ALS) inhibitors to Chlorella Vulgaris and Raphidocelis subcapitata using a mechanism-based approach. These models have good fitness and predictive ability. The potential of electron transfer, intermolecular interactions with weak electron-transfer, a ...
DOI:
10.1007/s00128-009-9811-8
PubMed:
19582361

192. Preparation and evaluation of molecularly imprinted solid-phase microextraction fibers for selective extraction of bisphenol A in complex samples

Author:
Chen, Jingwen,   et al.   ; Tan, Feng; Zhao, Hongxia; Li, Xiaona; Quan, Xie; Xiang, Xuemin; Zhang, Xin;     Show all 7 Authors
Source:
Journal of chromatography 2009 v.1216 no.30 pp. 5647-5654
ISSN:
0021-9673
Subject:
bisphenol A; chromatography; coatings; humans; milk; molecular imprinting; polymerization; polymers; solid phase microextraction; tap water; urine
Abstract:
... Molecular imprinted polymer (MIP) as solid-phase microextraction (SPME) fibers coating has gained great attention in recent years. In this study, a simple preparation approach for bisphenol A (BPA) MIP coating with controlled thickness on fused-silica capillaries was developed. A capillary was inserted into a larger bore capillary to form a sleeve as mold. The prepolymer solution containing the te ...
DOI:
10.1016/j.chroma.2009.06.007

193. More Toxic and Photoresistant Products from Photodegradation of Fenoxaprop-p-ethyl

Author:
Chen, Jingwen,   et al.   ; Lin, Jing; Wang, Ying; Cai, Xiyun; Wei, Xiaoxuan; Qiao, Xianliang;     Show all 6 Authors
Source:
Journal of agricultural and food chemistry 2008 v.56 no.17 pp. 8226-8230
ISSN:
0021-8561
Subject:
toxicity; toxicity testing; photolysis; herbicides; ecotoxicology; environmental fate; chemical analysis; chemical composition
Abstract:
... The photodegradation pathway of the commonly used herbicide fenoxaprop-p-ethyl (FE) was elucidated, and the effects of the photodegradation on its toxicity evolution were investigated. Under solar irradiation, FE could undergo photodegradation, and acetone enhanced the photolysis rates significantly. The same photoproducts formed under the irradiation of λ > 200 nm and λ > 290 nm through rearrange ...
DOI:
10.1021/jf801341s
PubMed:
18683946