| 交换电极法强化电动修复铬污染土壤 |
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| 引用本文： | 路平,冯启言,李向东,袁涛,孙悦.交换电极法强化电动修复铬污染土壤[J].环境工程学报,2009,3(2):354-358. |
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| 作者姓名： | 路平 冯启言 李向东 袁涛 孙悦 |
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| 作者单位： | 中国矿业大学环境与测绘学院,江苏省资源环境信息上程重点实验室,徐州,221116 |
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| 摘 要： | pH值是影响污染土壤电动修复的主要因素。为此提出了交换电极法强化电动修复，并对该技术进行了实验研究。实验土壤Cr污染浓度为506.36 mg/kg，工作电压为1 V/cm，结果显示，固定电极方向运行模式下，运行2 d，产生聚焦效应，运行8 d，碱性区Cr(III)残留量和酸性区Cr(VI)残留量较大，分别是97.88 mg/kg和328 mg/kg，总铬去除率为59.04%。采用交换电极法，交换频率为4 d，运行8 d，总铬去除率为70.18%；交换频率为2 d，运行8 d，总铬去除率高达86.10%，土壤中总铬平均含量从506.36 mg/kg降至73.56 mg/kg，达到酸性土壤环境质量一级标准。该技术可控制土壤pH值在中性范围，电流密度高，不添加化学试剂，操作简单。
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| 关 键 词： | 电动修复 交换电极法 铬污染土壤 聚焦效应 电流密度 |
Improvement in electrokinetic remediation of chromium contaminated soil with polarity exchange technique |
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| Lu Ping,Feng Qiyan,Li Xiangdong,Yuan Tao and Sun Yue.Improvement in electrokinetic remediation of chromium contaminated soil with polarity exchange technique[J].Techniques and Equipment for Environmental Pollution Control,2009,3(2):354-358. |
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| Authors: | Lu Ping Feng Qiyan Li Xiangdong Yuan Tao and Sun Yue |
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| Affiliation: | School of Environmental Science and Spatial Informatics, China University of Mining and Technology,Jiangsu Key Laboratory for Environmental Resource and Information Engineering, Xuzhou 221116,School of Environmental Science and Spatial Informatics, China University of Mining and Technology,Jiangsu Key Laboratory for Environmental Resource and Information Engineering, Xuzhou 221116,School of Environmental Science and Spatial Informatics, China University of Mining and Technology,Jiangsu Key Laboratory for Environmental Resource and Information Engineering, Xuzhou 221116,School of Environmental Science and Spatial Informatics, China University of Mining and Technology,Jiangsu Key Laboratory for Environmental Resource and Information Engineering, Xuzhou 221116 and School of Environmental Science and Spatial Informatics, China University of Mining and Technology,Jiangsu Key Laboratory for Environmental Resource and Information Engineering, Xuzhou 221116 |
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| Abstract: | The successful electrokinetic treatment of heavy metal polluted soil depends mainly on soil pH value.Laboratory electrokinetic experiments were conducted using field soils with chromium concentration of 506.36 mg/kg,and subjected to a voltage gradient of 1 V/m.The results show that "focusing effect" generates in the second day using the conventional electrokinetic remediation with fixed polarity.The high remnant Cr(III) in alkaline zone and Cr(VI) in acid zone are observed,the concentration of which are 97.... |
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| Keywords: | electrokinetic remediation polarity exchanges chromium contaminated soil focusing effect electric current density |
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