Evaluation of impacts of soil fractions on phenanthrene sorption

文献类型： 外文期刊

第一作者： Luo, Lei

作者： Luo, Lei;Zhang, Shuzhen;Luo, Lei;Ma, Yibing

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关键词： phenanthrene;sorption;organic carbon;mineral

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

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年卷期：

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收录情况： SCI

摘要： Phenanthrene sorption to soils and soil fractions was investigated using two contrasting soils with different clay mineral and organic carbon (OC) contents in an attempt to evaluate the contribution of each soil fraction to phenanthrene sorption and the applicability of the carbon-normalized distribution constant (K_(OC)) in soils. Sorbents were characterized using surface analysis, solid-state ~(13)C NMR analysis, and glass transition temperature (T_g) analysis to gain a insight into the chemical nature of OC in soils. Dissolved organic carbon (DOC) in the soil solution impeded the phenanthrene sorption, while humins accounted for the predominant phenanthrene sorption in soils. The contribution of OC to phenanthrene sorption in soil would be overestimated if only a K_(OC)-approach was adopted, since clay minerals could account for much of the sorption, especially when OC was low in soils. Nitrogen gas was shown to be inappropriate for probing non-polar sorption capacity. The results obtained highlight the importance of clay minerals in governing the sorption of phenanthrene in soil, and emphasize the inapplicability of the carbon-normalized distribution coefficient K_(OC) in soils.

分类号： X51

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