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
作者： Wang, Yong-kui 1 ; Tao, Liang 1 ; Chen, Man-jia 1 ; Li, Fang-bai 1 ;
作者机构： 1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 100049, Guangdong, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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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