EDTA作为螯合剂应用于棕地修复的研究综述

Application of EDTA as Chelating Agent for Brownfield Remediation

乙二胺四乙酸(Ethylenediaminetetraacetic acid,简称EDTA)是一种高效的螯合剂,可以应用于棕地修复中,具体体现在棕地空间(土壤、水体和空气)中重金属污染物含量的测定、清除,促进环境中的微生物反应等方面。首先介绍棕地相关的概念,重点从以EDTA为螯合剂制备的化学淋洗制剂、电化学絮凝剂、络合纳滤剂及EDTA分析滴定法2个角度阐述了EDTA对于棕地修复的应用。结合一个棕地治理工作的成功案例,总结螯合剂EDTA和配位反应的使用在棕地修复中的效果和我国棕地治理的现状,可以为EDTA与其相关反应在棕地修复中的实践应用提供一些参考。

Ethylenediaminetetraacetic acid(EDTA) is a highly efficient chelating agent, which can be used in brownfield remediation, especially in the determination and removal of heavy metal pollutants in brownfield space(soil, water and air) and the promotion of microbial reaction in the environment. In this paper, firstly, the concept of brownfield was introduced, and the application of EDTA to the remediation of brownfield was expounded from two perspectives, namely, chemical elution preparation prepared with EDTA as chelating agent, electrochemical flocculant, complexation nanofiltration agent and EDTA analytical titration. Combined with the status quo and a successful cases of brownfield remediation abroad, the effect of chelating agent EDTA and coordination reaction in brownfield remediation and the status quo of brownfield governance in China are summarized, which can provide some references for the practical application of EDTA and its related reactions in brownfield remediation.