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电动力学作用下污染土壤中HCHs的迁移特征

倪茂飞 田书磊 黄启飞 杨延梅 杨 帅 李 川

倪茂飞, 田书磊, 黄启飞, 杨延梅, 杨 帅, 李 川. 电动力学作用下污染土壤中HCHs的迁移特征[J]. 环境科学研究, 2015, 28(11): 1693-1701.
引用本文: 倪茂飞, 田书磊, 黄启飞, 杨延梅, 杨 帅, 李 川. 电动力学作用下污染土壤中HCHs的迁移特征[J]. 环境科学研究, 2015, 28(11): 1693-1701.
NI Maofei, TIAN Shulei, HUANG Qifei, YANG Yanmei, YANG Shuai, LI Chuan. Migration Characteristics of HCHs in Contaminated Soil by Electrokinetics[J]. Research of Environmental Sciences, 2015, 28(11): 1693-1701.
Citation: NI Maofei, TIAN Shulei, HUANG Qifei, YANG Yanmei, YANG Shuai, LI Chuan. Migration Characteristics of HCHs in Contaminated Soil by Electrokinetics[J]. Research of Environmental Sciences, 2015, 28(11): 1693-1701.

电动力学作用下污染土壤中HCHs的迁移特征

基金项目: 国家自然科学基金项目(51178440)

Migration Characteristics of HCHs in Contaminated Soil by Electrokinetics

  • 摘要: 为研究电动力学作用对污染土壤中HCHs迁移的影响及不同HCHs异构体间的迁移特征,以我国西南地区已停产的某HCHs(六六六)生产企业厂区的污染土壤为研究对象,分析反应时间、电压梯度、w(电解质)和pH等因素对HCHs迁移效果的影响. 结果表明:HCHs可以在电场力条件下进行有效迁移,其迁移效果随反应时间的增加而增强,并在192 h后达到稳定;增加电压梯度可以促进HCHs的迁移,最佳电压梯度为3.0 V/cm;最佳w(电解质)为2%;HCHs的迁移效果在pH为5.07时达到最佳. HCHs由阴极向阳极迁移,不同HCHs异构体在阳极的富集程度存在差异,其中α-HCH富集率最高,为210.5%~226.3%;而β-HCH、γ-HCH、δ-HCH富集率分别为72.5%~265.3%、38.5%~79.3%、57.3%~62.6%. 电动试验结束后,阴极处电导率最高,为1.2~324.4 mS/cm. P(0.6)(距阴极的标准化距离为0.6的采样点)处最低,为0.1~70.1 mS/cm;土壤pH由阴极向阳极逐渐减小,其中阴极pH为10.31~12.05,而阳极pH为0.98~4.56. 研究显示,电动因素会对污染土壤中HCHs的迁移造成不同程度影响;不同HCHs异构体中,α-HCH迁移能力最强,β-HCH次之,γ-HCH和δ-HCH迁移能力较弱.

     

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  • 收稿日期:  2015-06-18
  • 修回日期:  2015-08-10
  • 刊出日期:  2015-11-25

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