Estimation of soil organic partition coefficients: from retention factors measured by soil column chromatography with water as eluent |
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Authors: | Xu Feng Liang Xinmiao Lin Bingcheng Schramm Karl-Werner Kettrup Antonius |
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Institution: | Dalian Institute of Chemical Physics, Chinese Academy of Sciences, PR China. fengxu64@hotmail.com |
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Abstract: | The retention factors (k) of 104 hydrophobic organic chemicals (HOCs) were measured in soil column chromatography (SCC) over columns filled with three naturally occurring reference soils and eluted with Milli-Q water. A novel method for the estimation of soil organic partition coefficient (Koc) was developed based on correlations with k in soil/water systems. Strong log Koc versus log k correlations (r>0.96) were found. The estimated Koc values were in accordance with the literature values with a maximum deviation of less than 0.4 log units. All estimated Koc values from three soils were consistent with each other. The SCC approach is promising for fast screening of a large number of chemicals in their environmental applications. |
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