化学修复重金属污染土壤的研究

Research on Chemical Remediation of Heavy Metals in Contaminated Soils

化学萃取修复是一种高效、常用的土壤重金属污染修复方法。文章对比了乙二胺四乙酸二钠盐(EDTA)、柠檬酸、草酸、酒石酸、焦性没食子酸、柠檬酸三钠和草酸钠去除土壤中的Cu,Fe,Mn,Ni,Pb和Zn等重金属的能力,并研究了EDTA在萃取污染土壤中重金属时的影响因素和最佳萃取条件。结果表明:EDTA去除污染土壤中各种重金属的效果均好于其他几种萃取剂。

Chemical remediation is often and eftqciendy used to remove the heavy metals in contaminated soils. This paper compared the extractability of EDTA, citric acid, oxalic acid, tartaric acid, gallic acid, tri-sodium citrate and sodium oxalate in removing Cu, Fe, Mn, Ni, Pb and Zn in contaminated soils, and also studied the effective factors and the optimization conditions for extracting the heavy metals in the contaminated soil by using EDTA. The results indicated that EDTA was more effective extracting agent for removing the different heavy metals in the contaminated soil than the other agents.