金矿尾渣中铜的电动修复

doi:10.16085/j.issn.1000-6613.2016.04.043

化工进展 ›› 2016, Vol. 35 ›› Issue (04): 1237-1241.DOI: 10.16085/j.issn.1000-6613.2016.04.043

金矿尾渣中铜的电动修复

勾凯¹, 张英杰², 孙鑫³, 董鹏²

1. 昆明理工大学材料科学与工程学院, 云南昆明 650093;
2. 昆明理工大学冶金与能源工程学院, 云南昆明 650093;
3. 昆明理工大学环境科学与工程学院, 云南昆明 650500

收稿日期:2015-10-19 修回日期:2015-11-22 出版日期:2016-04-05 发布日期:2016-04-05
通讯作者: 张英杰,博士,教授,研究方向为电化学能源、电化学防护及电化学环境保护.E-mail:yingjie@kmust.edu.cn.
作者简介:勾凯(1988-),硕士研究生,研究方向为土壤中重金属的电动修复.

Electrokinetic remediation of gold mine tailings polluted with copper

GOU Kai¹, ZHANG Yingjie², SUN Xin³, DONG Peng²

1. School of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China;
2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China;
3. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China

Received:2015-10-19 Revised:2015-11-22 Online:2016-04-05 Published:2016-04-05

摘要/Abstract

摘要： 以云南省大理白族自治州鹤庆县北衙金矿尾渣为研究对象,采用电动修复技术,研究了不同的阳极工作液、不同的可渗透反应材料(PRB)和不同的可渗透反应材料放置位置对矿渣中铜的去除率的影响,分析了尾矿中铜的形态分布及修复技术对不同形态铜的去除情况.矿渣中水溶态的铜含量占总含铜量的0.7%,弱酸可提取态占5.8%,铁锰氧化物结合态占40.9%,有机物及硫化物结合态占9.7%,残渣态占42.9%.结果表明,阳极工作液为0.1mol/L柠檬酸溶液、PRB为椰壳活性炭并置于距阳极10cm处时,近阳极区矿渣中水溶态的铜去除率为66.5%,弱酸可提取态铜的去除率为51.5%,铁锰氧化物结合态铜的去除率为58.5%,而电动修复对有机物及硫化物结合态和残渣态的铜几乎没有效果.

关键词: 金矿尾渣, 电动修复, 铜形态

Abstract: In this paper, the gold mine tailings collected from Dali Bai autonomous, Heqing prefecture, Yunnan province, China were investigated by electrokinetic remediation. The effect of different anode electrode solution, permeable reactive barrier(PRB) materials and placement of the PRB on the removal rate of copper was studied. The morphological changes of copper in the electrokinetic remediation were also investigated. The percent of water soluble species, acid extractable fraction, Fe-Mn oxides species, organic matter species and residual species in total copper content were 0.7%, 5.8%, 40.9%, 9.7%, and 42.9% respectively. The results indicated that the removal rate of water soluble species, acid extractable fraction, Fe-Mn oxides species can reach 66.5%, 51.5% and 58.5% respectively when the anode electrode solution was 0.1mol/L citric acid solution and the PRB was coconut shell activated carbon and placed in 10cm away from the anode. Unfortunately there was almost no effect about organic matter species and residual species of copper. However, there were few reports about the research on electrokinetic remediation of mine tailings. This study can provide a reference for related research.

Key words: gold mine tailings, electrokinetic remediation, speciation of copper

中图分类号:

勾凯, 张英杰, 孙鑫, 董鹏. 金矿尾渣中铜的电动修复[J]. 化工进展, 2016, 35(04): 1237-1241.

GOU Kai, ZHANG Yingjie, SUN Xin, DONG Peng. Electrokinetic remediation of gold mine tailings polluted with copper[J]. Chemical Industry and Engineering Progree, 2016, 35(04): 1237-1241.

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金矿尾渣中铜的电动修复

Electrokinetic remediation of gold mine tailings polluted with copper

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