刘维屏
农药环境污染化学、环境分析化学及污染控制化学等。
个性化签名
- 姓名:刘维屏
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
有机化学
- 研究兴趣:农药环境污染化学、环境分析化学及污染控制化学等。
刘维屏,博士,教授,博士生导师。2002年国家杰出青年基金获得者,浙江省高校“钱江学者”特聘教授、“151人才工程”第一层次人才,浙江工业大学环境科学研究中心主任、“环境科学”创新团队负责人。1982年浙江大学化学系毕业留校工作,先后获浙江大学环境化学硕士学位(导师为陈耀祖院士)和东京农业大学应用生物化学博士学位(导师为大泽贯寿校长)。1990.5-92.11意大利Sassari大学生物与环境科学系访问学者(全意科学研究委员会CNR Fellowship);1998.7-99.2美国农业部Salinity国家实验室高访(USDA Visiting Research Fellow);2000.10-12日本九州大学农药化学研究室高访(日本学术振兴会Senior Fellowship);2002.1-04.9间每年6-9个月在美国加州大学(UCR)环境科学系合作研究;2005.7-9在美国路易斯安哪州立大学(LSU)生物系高访。曾任原浙江大学化学系副主任、校环境科学研究中心主任,新浙江大学环资学院副院长、学术委员会主任,“环境科学”省重点学科及博士点负责人。2005年被聘为浙江省高校“钱江学者”特聘教授,浙江工业大学环境科学研究中心主任。兼任中国化学会环境化学专业委员会委员,国际纯粹与应用化学联合会(IUPAC)、美国化学会(ACS)、美国科学促进协会(AAAS)会员等。
近年来,主持了国家自然科学基金杰出青年基金、国际合作基金、面上项目及国家重点基础研究“973”子课题等国家课题10多项。主要研究方向为:农药环境污染化学、环境分析化学及污染控制化学等。近期代表性学术贡献为:在国际上率先开展了手性农药环境安全研究。发展了目前广泛应用的有机磷、拟除虫菊酯等两类杀虫剂的对映体拆分方法,在对映体水平上进行了非靶标生物毒性评价;发现了手性农药不同对映体对靶标与非靶标生物的毒理差异性和环境代谢差异性;提出手性农药的环境安全应从对映体水平上考虑的观点。有关研究成果发表在《美国科学院院刊(PNAS)》,被Science、Science Daily、Environ. Sci. Tech.、《科学时报》等国内外学术期刊与科技媒体作为科学新闻介绍与评述。已在PNAS、Environ. Sci. Technol.、J. Agric. Food Chem.、Environ. Toxic. Chem.、Ecotoxic. Environ. Safety、J. Environ. Qual.、Chemosphere等国外期刊发表论文60余篇,国际学术会议发表论文26篇,其中SCI已收录106篇。研究论文已被国内外学术界广泛引用(他引1000余次)。国家自然科学基金“研究成果专著出版基金”资助出版的专著《农药环境化学》列入国家新闻出版总署“十五”重点图书。指导的博士研究生,2人分获2002年“全国百篇优秀博士学位论文”和2003年“全国百篇优秀博士学位论文”提名论文;有2人分获2003、2004年美国化学会农用化学品专业委员会颁发的Outstanding Young Scientist Award(每年这一奖项仅授予2人)。曾任2000年中法“环境科学与工程中相关的数学问题学术研讨会”执行委员会中方主席,2002年“中国第一届环境化学学术大会”的组委会执行主席。1990年获首届浙江省青年科技奖,1995年获中国环境科学学会“全国优秀环境科技工作者”称号,2002年获浙江省科技进步三等奖1项(第一完成者),2005年获浙江省高等学校教学成果一等奖1项(第二完成者)。
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刘维屏, WEIPING LIU AND JAY J. GAN*
J. Agric. Food Chem. 2004, 52, 755-761 ,-0001,():
-1年11月30日
Synthetic pyrethroid (SP) insecticides are of environmental significance because of their high aquatic toxicity. Due to their chirality, SP compounds contain multiple diastereomers and enantiomers. However, due to great structural similarities and lack of isomer standards, gas chromatographic (GC) analysis of SP diastereomers or enantiomers is poorly developed. In this study, we used a HP-5 column to separate the diastereomers and a
Chiral analysis, diastereomer separation, enantiomer separation, synthetic pyrethroids, enantioselectivity
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刘维屏, WEIPING LIU AND JAY J. GAN*
J. Agric. Food Chem. 2004, 52, 736-741,-0001,():
-1年11月30日
Solid phase microextraction (SPME) is an ideal sample preparation technique because of its speed and solvent-free features. Sampling by SPME is selective and only the dissolved concentration is measured, which allows measurement of the bioavailable fraction of a contaminant in aqueous media. One potential application of SPME is for analysis of enantiomers of chiral contaminants in environmental samples. In this study, a method was developed for determining enantiomers of (Z)-cis-bifenthrin and cis-permethrin in water using coupled SPME and enantioselective gas chromatography (GC). Following SPME sampling, enantiomers of (Z)-cis-bifenthrin and cis-permethrin were separated at the baseline on a â-cyclodextrin-based enantioselective column, and analyte enrichment onto the SPME fiber was not enantioselective. The GC response increased as sampling time was increased from 0 to 240 min, and as sampling temperature was increased from 20 to 40℃. Organic solvents such as methanol, acetone, and acetonitrile enhanced, while soil extracts slightly decreased, the GC response. The integrated SPME-enantioselective GC method was used to analyze surface runoff samples. The analysis showed preferential degradation of the 1S-3S enantiomer over the 1R-3R enantiomer for both (Z)-cis-bifenthrin and cis-permethrin. The concentrations detected by SPMEGC were substantially smaller than those determined following solvent extraction, suggesting that SPME-enantioselective GC analysis selectively measured the dissolved fraction.
Solid-phase microextraction, SPME, chiral analysis, enantiomer separation, synthetic pyrethroids, enantioselective analysis
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【期刊论文】Influence of Organic Matter and pH on Bentazone Sorption in Soils
刘维屏, KEBIN LI, †, ‡, WEIPING LIU, *, ¶, DONGMEI XU, AND SANGJIN LEE¶
J. Agric. Food Chem. 2003, 51, 5362-5366,-0001,():
-1年11月30日
Bentazone (3-isopropyl-1H-2,1,3-benzonthiadiazain-(4)3H-one 2,2-dioxide) is a postemergence herbicide which is used extensively worldwide, especially in China. The sorption of bentazone in various types of soils and extracted humic acids was investigated using a batch equilibration technique. Significant linearity was observed in sorption isotherms in five different types of soil, with distribution coefficients (Kd) that varied between 0.140 and 0.321mLg-1. The distribution coefficient was determined to be a function of organic matter and pH in the soil. A model based on distribution coefficients was developed to predict bentazone sorption in soils. The organic matter-normalized partition coefficients for the neutral and anionic forms of bentazone were 370.3 and 2.40mLg-1, respectively. Hence, more attention should be given to the potential leaching problem when bentazone is applied in soils containing low organic matter and high pH.
Sorption, bentazone, soil, humic acids, partition coefficients
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【期刊论文】PHASE DISTRIBUTION OF SYNTHETIC PYRETHROIDS IN RUNOFF AND STREAM WATER
刘维屏, WEIPING LIU, †, JAY J. GAN, *†, SANGJIN LEE, and JOHN N. KABASHIMA‡
Environmental Toxicology and Chemistry, Vol. 23, No.1, pp. 7-11, 2004,-0001,():
-1年11月30日
Synthetic pyrethroids (SPs) are a group of hydrophobic compounds with significant aquatic toxicity. Their strong affinity to suspended solids and humic materials suggests that SPs in natural surface water are distributed in solid-adsorbed, dissolved organic matter (DOM)-adsorbed, and freely dissolved phases. The freely dissolved phase is of particular importance because of its mobility and bioavailability. In the present study, we used solid-phase microextraction to detect the freely dissolved phase, and we evaluated the phase distribution of bifenthrin and permethrin in stream and runoff waters. In stream water, most SPs were associated with the suspended solids and, to a lesser extent, with DOM. The freely dissolved phase contributed only 0.4% to 1.0%. In runoff effluents, the freely dissolved concentration was 10% to 27% of the overall concentration. The predominant partitioning into the adsorbed phases implies that the toxicity of SPs in surface water is reduced because of decreased bioavailability. This also suggests that monitoring protocols that do not selectively define the freely dissolved phase can lead to significant overestimation of toxicity or water-quality impacts by SPs.
Bioavailability,, Suspended solids,, Bifenthrin,, Permethrin,, Adsorption
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【期刊论文】Evaluation of Kd Underestimation Using Solid Phase Microextraction
刘维屏, S. LEE, J. G A N, *, W. P. LIU, ANDM. A. AND ERSON
Environ. Sci. Technol. 2003, 37, 5597-5602,-0001,():
-1年11月30日
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刘维屏, WEIPING LIU, *, †, WEI ZHENG, AND JIANYING GAN‡
J. Agric. Food Chem. 2002, 50, 6823-6827,-0001,():
-1年11月30日
Soil organic matter and clay minerals are responsible for the adsorption of many pesticides. Adsorption and competitive sorption of imidacloprid on clay minerals and humic acids (HA) were determined using the batch equilibration method. The sorption coefficient of imidacloprid on humic acids was significantly higher than that on Ca-clay minerals, indicating that soil organic matter content was a more important property in influencing the adsorption of imidacloprid. Competitive sorption was investigated between imidacloprid and its main metabolite imidacloprid-urea on HA and Ca-clay minerals. The results showed that the sorption capacity of imidacloprid on clay minerals and HA was reduced in the presence of the metabolite, implying that imidacloprid-urea could occupy or block adsorption sites of imidacloprid on soil, potentially affecting the fate, transport, and bioavailability of imidacloprid in the environment. The interactions between a Ca-clay or HA-clay mixture and adsorption of imidacloprid and imidacloprid-urea were studied using IR differential spectra on thin films made of the adsorbent. The possible mechanisms were discussed from the shift of characteristic IR absorption bands of imidacloprid and imidacloprid-urea after sorption.
Imidacloprid, imidacloprid-urea, sorption, adsorption, competitive sorption, clay minerals, humic acids
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刘维屏, WEIPING LIU, *, †, ‡, JIANYING GAN, AND SCOTT R. YATES§
J. Agric. Food Chem. 2002, 50, 4003-4008,-0001,():
-1年11月30日
Adsorption of chloroacetanilide herbicides on homoionic montmorillonite was studied by coupling batch equilibration and FT-IR analysis. Adsorption decreased in the order metolachlor>acetochlor> alachlor>propachlor on Ca2+-or Mg2+-saturated clays and in the order metolachlor>alachlor> acetachlor>propachlor on Al3+-or Fe3+-saturated clays. FT-IR spectra showed that the carbonyl group of the herbicide molecule was involved in bonding. For the same herbicide, adsorption of alachlor, acetachlor, and metolachlor on clay followed the order Ca2+ Mg2+<Al3+e Fe3+, which coincided with the increasing acidity of homoionic clays. Adsorption of propachlor, however, showed an opposite dependence, suggesting a different governing interaction. In clay and humic acid mixtures, herbicide adsorption was less than that expected from independent additive adsorption by the individual constituents, and the deviation was dependent on the clay-to-humic acid ratio, with the greatest deviation consistently occurring at a 60:40 clay-to-humic acid ratio.
Chloroacetanilide herbicides, adsorption, sorption, montmorillonite, humic acid, complexation, alachlor, acetochlor, metolachlor, propachlor
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【期刊论文】Degradation of 4-Chlorophenol by High-Voltage Pulse Corona Discharges Combined with Ozone
刘维屏, Yuezhong Wen, , Xuanzhen Jiang, and Weiping Liu
Plasma Chemistry and Plasma Processing, Vol. 22, No.1, March 2002,-0001,():
-1年11月30日
Degradation of aqueous 250mg/L 4-chlorophenol (4-CP) by high-
Advanced oxidation process, 4-chlorophenol, degradation, highvoltage pulsed corona discharges, plasma, ozone.,
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【期刊论文】Structural Influences in Relative Sorptivity of Chloroacetanilide Herbicides on Soil
刘维屏, Weiping Liu, †, Jianying Gan, *, Sharon K. Papiernik, and Scott R. Yates
J. Agric. Food Chem. 2000, 48, 4320-4325,-0001,():
-1年11月30日
Adsorption of the chloroacetanilide herbicides acetochlor, alachlor, metolachlor, and propachlor was determined on soils and soil components, and their structural differences were used to explain their sorptivity orders. On all soils and soil humic acids, adsorption decreased in the order: metolachlor >acetochlor>propachlor>alachlor. On Ca2+-saturated montmorillonite, the order changed to metolachlor >acetochlor>alachlor>propachlor. FT-IR differential spectra of herbicide-clay or herbicide-humic acid-clay showed possible formation of hydrogen bonds and charge-transfer bonds between herbicides and adsorbents. The different substitutions and their spatial arrangement in the herbicide molecule were found to affect the relative sorptivity of these herbicides by influencing the reactivity of functional groups participating in these bond interactions. It was further suggested that structural characteristics of pesticides from the same class could be used to improve prediction of pesticide adsorption on soil.
Adsorption, sorption, acetanilide herbicides, chloroacetanilide herbicides, acetochlor, alachlor, metolachlor, propachlor, organic matter, montmorillonite, humic acid
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【期刊论文】Sorption and Catalytic Hydrolysis of Diethatyl-Ethyl on Homoionic Clays
刘维屏, Weiping Liu, †, Jianying Gan, *, Sharon K. Papiernik, and Scott R. Yates
J. Agric. Food Chem. 2000, 48, 1935-1940,-0001,():
-1年11月30日
Sorption and catalytic hydrolysis of the herbicide diethatyl-ethyl [N-chloroacetyl-N-(2,6-diethylphenyl) glycine ethyl ester] on homoionic Na+-, K+-, Ca2+-, and Mg2+-montmorillonite clays were studied in aqueous media. The Freundlich sorption coefficient, Kf, measured from isotherms on clay followed the order of Na+≈K+>Mg2+≈Ca2+. Analysis of FT-IR spectra of diethatyl-ethyl sorbed on clay suggests probable bonding at the carboxyl and amide carbonyl groups of the herbicide. The rate of herbicide hydrolysis in homoionic clay suspensions followed the same order as that for sorption, indicating that sorption may have preceded and thus caused hydrolysis. Preliminary product identification showed that hydrolysis occurred via nucleophilic substitution at the carboxyl carbon, causing cleavage of the ester bond and formation of diethatyl and its dechlorinated derivative, and at the amide carbon, yielding an ethyl ester derivative and its acid. These pathways also suggest that hydrolysis of diethatyl-ethyl was catalyzed by sorption on the clay surface.
Sorption, adsorption, diethatyl, diethatyl-ethyl, hydrolysis, montmorillonite, clay, catalytic hydrolysis
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