摘要
土壤淋洗技术是当前重金属污染土壤常用的修复技术之一,是一种能够彻底从土壤中去除重金属的修复方法,具有操作简便、去除效率高、成本低的优点。本文以乙二胺四乙酸二钠(Na2EDTA)为淋洗剂对重金属污染土壤进行淋洗修复,通过设置对照实验确定较优的淋洗药剂浓度(1 mmol/L)、固液比(1∶4),并以该参数指导上海市某场地重金属污染(Cd、Pb、As)土壤治理项目的工程施工,在上述淋洗条件下,该项目修复后污染土壤中重金属浓度达标。该研究通过优化淋洗反应条件达到重金属去除率高、淋洗成本低的目的,并依此进行实际工程应用,对重金属污染土壤的修复施工具有实践指导意义。
Soil washing is one of commonly used remediation method for heavy metals pollutants,which is able to remove the heavy metals from soil.It is excellent in easy operation,high efficiency and low price.This paper tried to achieve soil washing with ethylene diamine tetra acetic acid disodium salt(Na2EDTA).Series of control experiments were set to determine the optimal washing concentration(1 mmol/L)and solid to liquid ratio(1∶4),and results were applied to certain project of heavy metal soil including Cd,Pb and As in Shanghai.This investigation found out an effective and affordable washing method for soil washing and the method had been successfully applied into practice.It is significant to the remediation of heavy metal polluted soil in the future.
作者
姚振楠
钮恺之
李明
徐子茜
Yao Zhennan;Niu Kaizhi;Li Ming;Xu Ziqian(Shanghai Chengtou Environment Ecological Remediation Technology Co.,Ltd.,Shanghai 200232,China)
出处
《广东化工》
CAS
2021年第12期154-156,共3页
Guangdong Chemical Industry
