Enhanced Electrokinetic Remediation of Copper-Contaminated Soils near a Mine Tailing Using the Approaching-Anode Technique

被引：13

作者：

Cai, Z. P. ^{[1
,2
]}

Chen, D. R. ^{[1
]}

Fang, Z. Q. ^{[1
]}

Xu, M. Q. ^{[3
,4
]}

Li, W. S. ^{[3
,4
]}

机构：

[1] S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China

[2] Guangdong Polytech Environm Protect Engn, Foshan 528216, Peoples R China

[3] S China Normal Univ, Sch Chem & Environm, Engn Res Ctr MTEES,Res Ctr BMET Guangdong Prov, Minist Educ,Key Lab ETESPG GHEI,Engn Lab OFMHEB G, Guangzhou 510006, Guangdong, Peoples R China

[4] S China Normal Univ, Innovat Platform ITBMD Guangzhou Municipal, Guangzhou 510006, Guangdong, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL ENGINEERING | 2016年 / 142卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Electrokinetic remediation; Approaching anodes (AAs); Cu contamination; Soil remediation; Mechanism; REMOVAL; LEAD; CADMIUM; ZN; CU;

D O I：

10.1061/(ASCE)EE.1943-7870.0001017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The soils contaminated by copper (Cu) near a mine tailing are remedied via an enhanced electrokinetical (EK) method utilizing approaching anodes (AAs). The variations in the removal efficiency and soil pH as a function of treatment time are determined. The maximum Cu removal efficiency is as high as 61.98% under a voltage gradient of 1V/cm for 48h; in contrast to 38.97% when the conventional electrokinetic remediation with one fixed anode (FA) is employed. Several anodes were inserted as AAs in the treated soil. They were switched in turn from the anode towards the cathode allowing for high H+ ions concentrations and high redox potentials to quickly migrate towards the cathode. As a result, the soil remediation is accelerated. The mechanism of Cu electromigration behavior in soils during an enhanced EK method is described as the elution in an electrokinetically-driven chromatogram. (C) 2015 American Society of Civil Engineers.

引用

页数：6

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