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Fe2+S2O82-EDTA体系中自由基离子对啶虫脒的氧化降解

阳 海 黎 源 徐 淼 刘华杰 庞怀林 张冠杰 易 兵

阳 海, 黎 源, 徐 淼, 刘华杰, 庞怀林, 张冠杰, 易 兵. Fe2+S2O82-EDTA体系中自由基离子对啶虫脒的氧化降解[J]. 环境科学研究, 2014, 27(3): 321-327.
引用本文: 阳 海, 黎 源, 徐 淼, 刘华杰, 庞怀林, 张冠杰, 易 兵. Fe2+S2O82-EDTA体系中自由基离子对啶虫脒的氧化降解[J]. 环境科学研究, 2014, 27(3): 321-327.
YANG Hai, LI Yuan, XU Miao, LIU Hua-jie, PANG Huai-lin, ZHANG Guan-jie, YI Bing. Chemical Oxidation Degradation of Acetamiprid by Radical Ions in Fe2+S2O82-EDTA Aqueous Solution[J]. Research of Environmental Sciences, 2014, 27(3): 321-327.
Citation: YANG Hai, LI Yuan, XU Miao, LIU Hua-jie, PANG Huai-lin, ZHANG Guan-jie, YI Bing. Chemical Oxidation Degradation of Acetamiprid by Radical Ions in Fe2+S2O82-EDTA Aqueous Solution[J]. Research of Environmental Sciences, 2014, 27(3): 321-327.

Fe2+S2O82-EDTA体系中自由基离子对啶虫脒的氧化降解

基金项目: 国家自然科学基金项目(21207034); 湖南省产业培育化项目(11CY007); 湖南省教育厅重点项目(10A022)

Chemical Oxidation Degradation of Acetamiprid by Radical Ions in Fe2+S2O82-EDTA Aqueous Solution

  • 摘要: 为探讨水环境中自由基离子对啶虫脒的共降解作用,研究了Fe2+/S2O82-/EDTA体系中啶虫脒降解的可行性,以及在Fe2+/S2O82-/EDTA体系中3种组分最佳配比条件下自由基离子和底物浓度对啶虫脒降解率的影响. 结果表明,在Fe2+/S2O82-/EDTA体系下反应360min后啶虫脒的降解率达到58.25%,c(Fe2+)、c(S2O82-)和c(EDTA)对Fe2+/S2O82-/EDTA体系的氧化能力均有较大的影响. 通过中心复合试验对Fe2+/S2O82-/EDTA体系中3种离子的最佳配比进行优化,c(EDTA)、c(Fe2+)、c(S2O82-)分别为1.61、3.46、7.99mmol/L. Fe2+/S2O82-/EDTA体系中·SO4-和·OH等自由基离子的存在是引起啶虫脒降解的主要原因,中性条件最有利于自由基离子的产生并提高啶虫脒高的降解率. 然而该体系中自由基离子的量是一定的,过高的c(啶虫脒)(>200μmol/L)对降解率有明显抑制.

     

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出版历程
  • 收稿日期:  2013-07-12
  • 修回日期:  2013-12-11
  • 刊出日期:  2014-03-25

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