贵州某铅锌矿区重金属污染土壤淋洗研究  

Study on Leaching of Heavy Metals Contaminated Soil in Pb-Zn Mining Area in Guizhou

作　　者：邓红江[1] 吴汉福[1] 田玲[1] 张绪勇[1] 李金辉[1] DENG Hong-jiang;WU Han-fu;TIAN Ling;ZHANG Xu-yong;LI Jin-hui(Liupanshui Normal University,Liupanshui 553001, China)

机构地区：[1]六盘水师范学院,贵州六盘水553001

出　　处：《六盘水师范学院学报》2017年第3期15-18,共4页Journal of Liupanshui Normal University

基　　金：贵州省科技厅科学技术基金项目(黔科合LH字[2015]7630号)

摘　　要：为探讨淋洗法修复铅锌矿区Pb、Cd和Zn污染土壤的修复效果,比较了在相同浓度下的EDTA、柠檬酸、乙酸和草酸对土壤中Pb、Cd和Zn去除效果。研究结果表明,淋洗剂对Pb、Cd和Zn的去除率的顺序是EDTA>柠檬酸>乙酸>草酸,EDTA是该矿区土壤淋洗修复较为理想的淋洗剂。EDTA溶液淋洗铅锌矿区Pb、Cd和Zn污染土壤的单因素实验表明,EDTA浓度0.15 mol/L、淋洗时间12 h、液固比15∶1、pH=5的条件下,对铅锌矿区污染土壤中Pb、Cd和Zn的去除率分别达84.32%、74.21%、73.42%。The repair effect of leaching contaminated soil by the heavy metals of Pb,Cd and Zn was discussed.EDTA,citric acid,acetic acid and oxalic acid in the same concentration to remove effect of Pb,Cd andZn were studied.The results showed that removal rate sequence of the Pb,Cd and Zn was EDTA>citric acid>acetic acid>oxalic acid,EDTA was an better leaching lotion.EDTA solution leaching Pb,Cd and Zn contaminated soil by single factor experiment showed that conditions were0.15mol/L EDTA concentration,leachingtime of12h,liquid-solid ratio of15∶1,pH=5,the Pb,Cd and Zn removal rate were84.32%,74.21%and84.32%respectively.

关 键 词：土壤 重金属 污染 淋洗 

分 类 号：X53[环境科学与工程—环境工程]