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    题名: Correlations between experimental and predicted equilibrium distribution coefficient of chlorobezene and chlorophenol compounds in soil-water system using partial solubility parameters
    作者: Jaw, C.G.;Lin, K.H.;Yen, J.H.;Wang, Y.S.
    贡献者: 輔英科技大學 環境工程與科學系
    日期: 2007-01-01
    上传时间: 2010-10-15 14:01:14 (UTC+8)
    摘要: Many pesticides are degraded to become chlorinated aromatic compounds in soils. Equilibrium distribution of chlorobenzene and chlorophenol compounds in soil-water systems of Yangmingshan loam, Pingcheng silty clay loam and Annei silty loam was studied with the integral distribution equilibrium equation involving the partial solubility parameters of the chemicals. If the adsorption of chemicals on soils is partitioning in soil organic matter surrounding the soil mineral particles, the absorption constant (Kd) of a chemical in soil-water system could be stated as the distribution coefficient (or partition constant, Koc) of the chemical in the two adjunct immiscible phases--water and soil organic matter. The distribution coefficient (Koc) of chemicals calculated from the integral distribution equilibrium equation agrees well with the experimental adsorption coefficient (Kd, or experimental Koc) of chemicals determined in this study, for all the three different types of soils in water according to multiple-regression analysis. Reference data of Karger or Tijssen are employed to estimate the Koc for both polar and non-polar chemicals. The integral distribution equilibrium equation can exactly describe the distribution behavior of nonionic compound of chlorobenzenes and chlorophenols in soil-water systems.
    關聯: Journal of Environmental Science and Health, Part B 42(1),97-105
    显示于类别:[環境工程與科學系] 期刊論文


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