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题名: Investigation on the influence of methanol on adsorption and leaching of pesticides with soil column liquid chromatography
作者: Ni, YW;  Liang, XM;  Chen, JP;  Zhang, Q;  Ma, LX;  Wu, WZ;  Kettrup, A
关键词: methanol ;  adsorption coefficients ;  retardation factors ;  pesticides ;  soil column liquid chromatography
刊名: CHEMOSPHERE
发表日期: 2004-09-01
DOI: 10.1016/j.chemosphere.2004.05.012
卷: 56, 期:11, 页:1137-1142
收录类别: SCI
文章类型: Article
项目归属: 103
产权排名: 1;1
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: The effect of methanol of low concentration on adsorption and leaching of atrazine and tebuconazole was studied in this paper. The adsorption coefficients and the retardation factors (R-m) of pesticides on EUROSOIL 3# log-linearly decreased as volumetric fraction of methanol (f(c)) was increased in the binary solvent mixtures of methanol and water. These data are consistent with solvophobic theory formerly outlined for describing the adsorption and transport of hydrophobic organic chemicals from mixed solvents. Nevertheless, the adsorption of these pesticides in soil-water system slightly increased when the soil was pre-washed with methanol in comparison with that pre-washed with water (pure water system). Furthermore, their adsorption coefficients were still higher in binary solvent systems with methanol of very low concentrations, i.e. f(c) < 0.03 for atrazine and f(c) < 0.01 for tebuconazole, than those in pure water system. The adsorption coefficients (logK(w)) of atrazine and tebuconazole predicted by solvophobic theory were 0.5792 and 1.6525, respectively, and their experimental logK(w) were 0.3701 and 1.6275 in pure water system. Obviously, the predicted log K-w of the two pesticides was higher than the experimental log K-w in pure water system. The predicted K-w and the retardation factor (R-w) in pure water system by solvophobic theory are thus possibly inaccurate. (C) 2004 Elsevier Ltd. All rights reserved.
关键词[WOS]: HYDROPHOBIC ORGANIC-CHEMICALS ;  SORPTION ;  COSOLVENTS ;  WATER ;  COEFFICIENTS ;  TRANSPORT ;  SYSTEMS ;  SOLVENT
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000223209300013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81663
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116011, Peoples R China
2.GSF, Natl Res Ctr Environm & Hlth, Inst Ecol Chem, D-85764 Neuherberg, Germany

Recommended Citation:
Ni, YW,Liang, XM,Chen, JP,et al. Investigation on the influence of methanol on adsorption and leaching of pesticides with soil column liquid chromatography[J]. CHEMOSPHERE,2004,56(11):1137-1142.
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