化工矿产地质2025，Vol.47Issue(2)：135-142,8.
电动修复污染土壤中复合重金属吸附材料的筛选
Screening of composite heavy metal adsorbent materials for electrokinetic remediation of contaminated soil
冯宏亮 1陈春发 1胡斌 1张敏1
作者信息
- 1. 中化地质矿山总局浙江地质勘查院,浙江 杭州 310000
- 折叠
摘要
Abstract
The composite electrode materials which deal with four heavy metals,namely Cd,Pb,Cu and As,with an excellent treatment effect were selected by electrokinetic repair technique.These materials were chosen to avoid excessive changes in the pH of the cathode and anode during the repair process and to overcome the limitation of removing a variety of heavy metals by a single material.Thus,we used hydrotalc,artificial/natural zeolite,anionic adsorption resin,wood powder carbon,acid zeolite,zero-valent iron and macroporous cationic adsorption resin as adsorption materials in different proportions to form composite electrodes and placed them on the electrodes of the electric device in the form of wrapping.To reduce the range of pH changes during the repair process,the experiment used glutamate tetrasodium diacetate(GLDA)as the chelating agent.Then the changes of pH and electrical conductivity(EC)before and after treatment were tested,and the removal efficiency of the composite electrode materials was calculated.The results show that under the ratio of hydrotalc to mother liquor of 4:10,the removal rate of four heavy metals by cathode and anode can reach more than 90%,and the pH increases after anodic treatment.Wood powder carbon has a good removal effect on Pb and Cu at the anode,and zero-valent iron has a good removal effect on Pb and Cu at the cathode.关键词
电动修复/复合电极/重金属/酸度控制Key words
Electrokinetic repair/Composite electrode/Heavy metal/Acidity control分类
环境科学引用本文复制引用
冯宏亮,陈春发,胡斌,张敏..电动修复污染土壤中复合重金属吸附材料的筛选[J].化工矿产地质,2025,47(2):135-142,8.
