强化电动修复铅酸电池厂附近铅污染的土壤

为了改进传统电动修复铅污染土壤效率,采用交换电极电动修复技术对珠江三角洲区域一铅酸电池厂附近的铅污染土壤进行修复。研究铅去除效率和土壤p H值的变化与修复时间及交换频率的关系。结果表明：当工作电压梯度为1 V/cm,交换间隔为48 h,铅去除效率最大值达到87.7%,远远大于传统固定电极方向运行模式的去除效率（61.8%）。另外,采用交换电极电动修复可以消除传统固定电极方向运行出现的＂聚焦效应＂,而且不用添加化学试剂。讨论了交换电极技术中铅在土壤中电迁移的机理。...

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Published in中国有色金属学报：英文版 Vol. 25; no. 9; pp. 3088 - 3095
Main Author 蔡宗平 Jeremiahvan DOREN 方战强 李伟善
Format Journal Article
LanguageEnglish
Published 2015
Subjects
交换电极
电动修复
铅污染土壤
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ISSN1003-6326

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Summary:为了改进传统电动修复铅污染土壤效率,采用交换电极电动修复技术对珠江三角洲区域一铅酸电池厂附近的铅污染土壤进行修复。研究铅去除效率和土壤p H值的变化与修复时间及交换频率的关系。结果表明：当工作电压梯度为1 V/cm,交换间隔为48 h,铅去除效率最大值达到87.7%,远远大于传统固定电极方向运行模式的去除效率（61.8%）。另外,采用交换电极电动修复可以消除传统固定电极方向运行出现的＂聚焦效应＂,而且不用添加化学试剂。讨论了交换电极技术中铅在土壤中电迁移的机理。
Bibliography:electrokinetic remediation; polarity exchanges; Pb-contaminated soil
43-1239/TG
Zong-ping CAI, Jeremiah van DOREN, Zhan-qiang FANG, Wei-shan LI（1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China; 2. Department of Chemical Biology, State University of New Jersey, Piscataway, NJ 08854, USA; 3. Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, China; 4. Engineering Research Center of Materials and Technology for Electrochemical Energy Storage （Ministry of Education）, South China Normal University, Guangzhou 510006, China）
To improve the conventional electrokinetic remediation of Pb-contaminated soil,the Pb-contaminated soil near a lead acid battery factory in the Pearl River Delta region of China was electrokinetically remedied with polarity exchange technique.The variations in Pb removal efficiency and the soil p H value with the treatment time and the exchange polarity interval were determined.It is found that the removal efficiency of Pb reaches a maximum of 87.7% when the voltage gradient is 1 V/cm and the exchange polarity interval is 48 h.This value is far higher than that obtained with conventional electrokinetic remediation（61.8%）.Additionally,the ＂focusing effect＂ which appears in the conventional electrokinetic remediation can be avoided,and thus additional chemicals are not needed for the polarity exchange technique.The mechanism of Pb electromigration behavior in soil during the treatment with the polarity exchange technique was described.
ISSN:1003-6326