Prediction of soil organic partition coefficients by a soil leaching column chromatographic method
Xu, F; Liang, XM; Lin, BC; Su, F; Schramm, KW; Kettrup, A
Indexed BySCI
Funding Project103
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS SubjectEnvironmental Sciences
WOS Research AreaEnvironmental Sciences & Ecology
AbstractThe soil organic partition coefficient (K-oc) is one of the most important parameters to depict the transfer and fate of a chemical in the soil-water system. Predicting K-oc by using a chromatographic technique has been developing into a convenient and low-cost method. In this paper, a soil leaching column chromatograpy (SLCC) method employing the soil column packed with reference soil GSE 17201 (obtained from Bayer Landwirtschaftszentrum, Monheim, Germany) and methanol-water eluents was developed to predict the K-oc of hydrophobic organic chemicals (HOCs), over a log K-oc range of 4.8 orders of magnitude, from their capacity factors. The capacity factor with water as an eluent (k(w)') could be obtained by linearly extrapolating capacity factors in methanol-water eluents (k') with various volume fractions of methanol (phi). The important effects of solute activity coefficients in water on k(w)' and K-oc were illustrated. Hence, the correlation between log K-oc and log k(w)' (and log k') exists in the soil. The correlation coefficient (r) of the log K-oc vs. log k(w)' correlation for 58 apolar and polar compounds could reach 0.987, while the correlation coefficients of the log K-oc-log k' correlations were no less than 0.968, with phi ranging from 0 to 0.50. The smaller the phi, the higher the r. Therefore, it is recommended that the eluent of smaller phi, such as water, be used for accurately estimating K-oc. Correspondingly, the r value of the log K-oc-log k(w)' correlation on a reversed-phase Hypersil ODS (Thermo Hypersil, Kleinostheim, Germany) column was less than 0.940 for the same solutes. The SLCC method could provide a more reliable route to predict K-oc indirectly from a correlation with k(w)' than the reversed-phase liquid chromatographic (RPLC) one.
WOS IDWOS:000174863300016
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116011, Peoples R China
2.GSF, Nat Res Ctr Environm & Hlth, Inst Ecol Chem, D-85764 Neuherberg, Germany
Recommended Citation
GB/T 7714
Xu, F,Liang, XM,Lin, BC,et al. Prediction of soil organic partition coefficients by a soil leaching column chromatographic method[J]. JOURNAL OF ENVIRONMENTAL QUALITY,2001,30(5):1618-1623.
APA Xu, F,Liang, XM,Lin, BC,Su, F,Schramm, KW,&Kettrup, A.(2001).Prediction of soil organic partition coefficients by a soil leaching column chromatographic method.JOURNAL OF ENVIRONMENTAL QUALITY,30(5),1618-1623.
MLA Xu, F,et al."Prediction of soil organic partition coefficients by a soil leaching column chromatographic method".JOURNAL OF ENVIRONMENTAL QUALITY 30.5(2001):1618-1623.
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