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铬-菲复合污染土壤的电动修复效果

杜玮 张光生 邹华 朱荣

杜玮, 张光生, 邹华, 朱荣. 铬-菲复合污染土壤的电动修复效果[J]. 环境科学研究, 2016, 29(8): 1163-1169.
引用本文: 杜玮, 张光生, 邹华, 朱荣. 铬-菲复合污染土壤的电动修复效果[J]. 环境科学研究, 2016, 29(8): 1163-1169.
DU Wei, ZHANG Guangsheng, ZOU Hua, ZHU Rong. Electrokinetic Remediation of Chromium-Phenanthrene Combined Contaminated Soils[J]. Research of Environmental Sciences, 2016, 29(8): 1163-1169.
Citation: DU Wei, ZHANG Guangsheng, ZOU Hua, ZHU Rong. Electrokinetic Remediation of Chromium-Phenanthrene Combined Contaminated Soils[J]. Research of Environmental Sciences, 2016, 29(8): 1163-1169.

铬-菲复合污染土壤的电动修复效果

基金项目: 国家水体污染控制与治理科技重大专项(2012ZX07503-002)

Electrokinetic Remediation of Chromium-Phenanthrene Combined Contaminated Soils

  • 摘要: 为了解决常规电动修复方法对土壤重金属-有机物复合污染去除效率低的问题,采用向电解液中添加表面活性剂以及控制阴极电解液为酸性的电动强化修复技术,以Cr和菲为代表性污染物,研究电压和表面活性剂〔TritonX-100(曲拉通100)、SDBS(十二烷基苯磺酸钠)〕以及阴极电解液pH对修复效果的影响. 结果表明:Cr(Ⅵ)以阴离子团形式呈现向阳极迁移的趋势,菲呈现向阴极迁移的趋势;随着施加电压的升高,污染物去除率也会相应提高,当电压梯度升至1.0 V/cm时,Cr(T)、Cr(Ⅵ)、菲的去除率分别达到34.3%、76.9%、12.7%. 在电压梯度为1 V/cm的条件下,控制阴极电解液pH为4.00时,Cr(T)、Cr(Ⅵ)、菲的去除率分别升至45.1%、84.8%、23.1%;向电解液中添加表面活性剂后能提高污染物的去除率,其中,添加SDBS能够将Cr-菲复合污染土壤中Cr(T)、Cr(Ⅵ)的去除率由34.3%、76.9%升至39.9%、82.0%,添加TritonX-100能够将有机物菲的去除率由12.7%升至27.0%. 研究显示,修复处理后污染物浓度均有不同程度的降低,充分表明电动处理时提高修复电压、添加表面活性剂以及控制阴极电解液的酸碱性可以明显促进污染物在土壤中的迁移.

     

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出版历程
  • 收稿日期:  2015-12-22
  • 修回日期:  2016-04-18
  • 刊出日期:  2016-08-25

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