کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5748007 1618925 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rates and equilibria of perfluorooctanoate (PFOA) sorption on soils from different regions of China
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Rates and equilibria of perfluorooctanoate (PFOA) sorption on soils from different regions of China
چکیده انگلیسی


- PFOA reached equilibrium with soil in 24 h and its sorption was correlated with physico-chemical properties.
- Sorption-desorption of PFOA was correlated with organic carbon and soil mineral composition.
- The main sorption mechanism of PFOA was hydrophobic interaction.

Understanding sorption of PFOA on soil particles is crucial to evaluate its environmental risk. Here, sorption of PFOA onto ten agricultural soils was examined. The influence of soil physico-chemical properties on PFOA sorption was investigated. The sorption rate of PFOA followed a pseudo-second-order kinetics. Isotherm data of PFOA sorption was fitted with both Freundlich and linear models and the latter fitted better. The sorption-desorption of PFOA onto ten soil samples depended on soil organic carbon content and composition of soil minerals. The sorption and desorption isotherms of PFOA on ten soils were linear, except for the sorption of PFOA onto a few soils, which was described by the Freundlich equation with the parameter N >1. The main sorption mechanism of PFOA was hydrophobic interaction between the perfluorinated carbon chain and the organic matter of soil, as evidenced by the correlation between the solid-liquid distribution coefficient and the fraction of soil organic carbon. The sorption of PFOA in soils was highly irreversible.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 139, May 2017, Pages 102-108
نویسندگان
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