Effects of the Fe-II/Cu-II Interaction on Copper Aging Enhancement and Pentachlorophenol Reductive Transformation in Paddy Soil
文献类型: 外文期刊
第一作者: Wang, Yong-kui
作者: Wang, Yong-kui;Tao, Liang;Chen, Man-jia;Li, Fang-bai;Wang, Yong-kui;Chen, Man-jia;Wang, Yong-kui;Chen, Man-jia
作者机构:
关键词: Pentachlorophenol;copper aging;Fe-II/Cu-II interaction;cyclic voltammetry;sequential extraction procedure
期刊名称:JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY ( 影响因子:5.279; 五年影响因子:5.269 )
ISSN: 0021-8561
年卷期: 2012 年 60 卷 2 期
页码:
收录情况: SCI
摘要: The present study investigated copper aging and pentachlorophenol (PCP) reductive transformation under the effects of the Fe-II/Cu-II interaction in paddy soil in south China. Kinetic measurements demonstrated that the PCP reductive transformation rate (k) could be promoted in the presence of no more than 0.375 mM Cu-II and inhibited in the presence of no less than 0.5 mM Cu-II. The highest k value in the presence of 0.25 mM Cu-II corresponds to the lowest redox potential (E-p) value of active Fe species. The increasing trend in E-p of the active Fe species is consistent with the declining trend in the k value of PCP reduction and vice versa. Dissolved Cu-II is gradually transformed into immobilized Cu species during PCP reduction, which indicates that Cu aging is enhanced by the Fe-II/Cu-II interaction. These findings improve our general understanding of the Fe-II/Cu-II interaction on soil iron redox chemistry for polychlorinated pesticide detoxification and heavy metal immobilization.
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