电动修复去除土壤中重金属镉的研究  

Study on removal of cadmium from soil by electrokinetic remediation

作　　者：李亚林[1] 倪明[1] 段万超 李婷婷[1] 刘蕾[2] 

机构地区：[1]河南工程学院资源与环境学院,河南郑州451191 [2]黄河科技学院工学院,河南郑州450063

出　　处：《河南工程学院学报（自然科学版）》2016年第1期42-46,共5页Journal of Henan University of Engineering：Natural Science Edition

基　　金：河南省高等学校重点科研项目(15A610010);河南工程学院博士基金(D2015008)

摘　　要：以普通地表土为研究对象,通过向土壤中添加污染液研究电动修复技术对土壤中重金属镉的去除.控制实验电压为30 V,电解液KCl的浓度为0.1 mol/L,实验周期为7 d,实验过程中分别针对土壤中重金属镉的分布、土壤含水率和p H值随通电时间变化的情况进行检测分析.实验结果表明,随着修复时间的增加,土壤中重金属镉的去除率逐步提高,镉的最终去除率达到90%以上;土壤的p H值在阳极附近呈酸性,在阴极附近呈碱性,重金属富集在靠近阴极的区域.In this paper,the ordinary surface soil was taken as object. By adding contaminated liquid,electrokinetic remediation method is researched to remove heavy metal cadmium in the soil. Laboratory experiments were lasted for 7 days remediation with 30 V voltage,and 0. 1 mol / L KCl as the electrolyte solution. In this process,changes of cadmium distribution,soil moisture and p H value with electrokinetic remediation time were analyzed. The results show that the removal of cadmium in soil increased with the electrokinetic remediation time,and the electromagnetism efficiency was up to 90%. The soil was alkaline near the cathode,anode nearby was acidic,and the heavy metal was enriched in the area near the cathode.

关 键 词：重金属 电动修复 污染土壤 镉 

分 类 号：X53[环境科学与工程—环境工程]