文献类型： 外文期刊
作者： Wei, Zhiqi 1 ; Gao, Ting 1 ; Wang, Jizeng 4 ; Liu, Hui 2 ; Liu, Chengshuai 1 ; Zhu, Jushu 1 ; Zhou, Jianmin 2 ; Chen, Man 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.Minist Environm Protect, South China Inst Environm Sci, Guangzhou 510655, Guangdong, Peoples R China
3.Qianjiang Environm Protect Bur Hubei Prov, Qianjiang 433199, Peoples R China
4.Zhongkai Univ Agr & Engn, Coll Environm Sci & Engn, Guangzhou 51022
关键词： ISCO; Manganese ion; Persulfate activation; Degradation; Organo-chlorine pesticides; pH; Temperature
期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）
ISSN： 1018-4619
年卷期： 2018 年 27 卷 7 期
页码：
收录情况： SCI
摘要： The process of in situ chemical oxidation (ISCO) by persulfate (S2O82-) can be accelerated by metal ion activation, so as to more effectively degrade the subsurface pollutants owing to the enhancement of sulfate radicals (SO4.(-)) generation. Mn2+ is a natural soil metal ion usually exists together with organic pollutants in contaminated soils and groundwater. In this study, the oxidative degradation of DDT by Mn2+ activated persulfate at different reaction conditions was systematically studied. The results showed that Mn2+ is a more stable activator for persulfate oxidation than other reported metal ions (e.g. Fe2+ reported in many papers previously). The activation of persulfate by Mn2+ ions gave DDT a long lasting and efficient degradation effect and a high mineralization rate. With fixed DDT and persulfate concentrations, higher Mn2+ concentrations would give DDT higher degradation rates, and higher temperature accelerated DDT degradation with Mn2+ activation. The pH conditions also posed a significant effect on DDT degradation by Mn2+ activated persulfate, and acidic conditions were found to be more favorable for DDT degradation. The results obtained in this study may give a promising indication and new technology with persulfate for in situ remediating soils and groundwater that contaminated by organo-chlorine pesticides.
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