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题名: Retention behavior of hydrophobic organic chemicals as a function of temperature in soil leaching column chromatography
作者: Liang, XM;  Xu, F;  Lin, BC;  Su, F;  Schramm, KW;  Kettrup, A
关键词: soil leaching column chromatography ;  retention factor ;  temperature ;  enthalpy ;  linear solvation energy relationships
刊名: CHEMOSPHERE
发表日期: 2002-11-01
卷: 49, 期:6, 页:569-574
收录类别: SCI
文章类型: Article
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: To study the transport mechanism of hydrophobic organic chemicals (HOCs) and the energy change in soil/solvent system, a soil leaching column chromatographic (SLCC) experiment at an environmental temperature range of 20-40 degreesC was carried out, which utilized a reference soil (SP 14696) packed column and a methanol-water (1:4 by volume ratio) eluent. The transport process quickens with the increase of column temperature. The ratio of retention factors at 30 and 40 degreesC (k'(30)/k'(40)) ranged from 1.08 to 1.36. The lower enthalpy change of the solute transfer in SLCC (from eluent to soil) than in conventional reversed-phase liquid chromatography (e.g., from eluent to C-18) is consistent with the hypothesis that HOCs were dominantly and physically partitioned between solvent and soil. The results were also verified by the linear solvation energy relationships analysis. The chief factor controlling the retention was found to be the solute solvophobic partition, and the second important factor was the solute hydrogen-bond basicity, while the least important factors were the solute polarizability-dipolarity and hydrogen-bond acidity. With the increase of temperature, the contributions of the solute solvophobic partition and hydrogen-bond basicity gradually decrease, and the latter decreases faster than the former. (C) 2002 Elsevier Science Ltd. All rights reserved.
关键词[WOS]: PERFORMANCE LIQUID-CHROMATOGRAPHY ;  SOLVATION ENERGY RELATIONSHIPS ;  SORPTION ;  GROUNDWATER ;  EQUILIBRIA ;  PESTICIDES ;  WATER ;  MODEL ;  NAPHTHALENE ;  COSOLVENTS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000178631800007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85485
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:
Liang, XM,Xu, F,Lin, BC,et al. Retention behavior of hydrophobic organic chemicals as a function of temperature in soil leaching column chromatography[J]. CHEMOSPHERE,2002,49(6):569-574.
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