EDTA对污染土壤中金属解吸的影响  

The Effects of EDTA to the Desorption of Metals in Contaminated Soil

作　　者：杨天周[1] 

机构地区：[1]启东市环境监测站,江苏启东226200

出　　处：《污染防治技术》2008年第3期18-21,107,共5页Pollution Control Technology

摘　　要：重金属污染是当今土壤污染中的污染面积最广、危害最大的环境问题之一,有关污染土壤的修复研究正日益受到重视。现以黄土体土壤为对象,以铜、铅为代表,研究有机配体EDTA(乙二胺四乙酸)对土壤被重金属污染的解吸的影响。并分别讨论土壤中的单元素金属污染以及复合金属污染的解吸过程。结果表明,EDTA的加入,对Cu或Pb的单一污染土壤,可以大幅度增加金属的解吸量,但在Cu-Pb复合污染土壤中,由于两种金属离子同时存在,却出现Cu、Pb对EDTA的竞争性反应,彼此互为影响。Nowadays, the research on the remediation of polluted soil is paid more and more attention. In this paper, taking copper and lead as the representative, the metal desorption process in single and complex polluted soil by metals is discussed separately. The results showed that EDTA can significaniy increase the extraction amount of metal, and the extraction amount depends on the concentration of metals in the soil In the Cu - Pb complex polluted soil, both Cu and Pb have the chance to combine with EDTA, and they interact on each other.

关 键 词：重金属 乙二胺四乙酸 土壤 铜 铅 

分 类 号：X53[环境科学与工程—环境工程]