淋洗联合电动修复土壤中镉、镍、铅污染  

Combined Electrokinetic Remediation of Cadmium,Nickel and Lead Contamination in Soil by Leaching

作　　者：何涛 颜望培 张杰 江国昰 洪磊 贺三军 黄松峰 HE Tao;YAN Wangpei;ZHANG Jie;JIANG Guoshi;HONG Lei;HE Sanjun;HUANG Songfeng(China Energy Conservation and Environmental Protection Group(CECEP)Dadi Environmental Remediation Co.,Ltd.(Hangzhou),Hangzhou 311500,China;Hefei University,School of Biology,Food and Environment,Hefei 230601,China;Hefei East New Centre Construction Investment Co.,Ltd.,Anhui 230011,China)

机构地区：[1]中节能大地(杭州)环境修复有限公司,浙江杭州311500 [2]合肥大学,生物食品与环境学院,安徽合肥230601 [3]合肥东部新中心建设投资有限公司,安徽合肥230011

出　　处：《化工管理》2024年第19期48-52,共5页Chemical Management

摘　　要：文章旨在探究去离子水、硝酸、柠檬酸和EDTA四种淋洗剂对重金属镉、镍、铅污染土壤的淋洗效果,筛选出最优淋洗剂,并确定电动修复的最佳电压和修复时间。通过淋洗实验,比较了四种不同淋洗剂对重金属的去除率,发现EDTA表现出较好的去除效果,对重金属Cd、Ni和Pb分别为70.18%、67.17%和65.34%。在电动修复实验中,筛选出最佳电压为1.5 V/cm和最佳修复时间为5 d。将最优淋洗液(EDTA)与最佳电动修复条件(1.5 V/cm,5 d)相结合进行实验,结果显示联合技术对土壤中重金属Cd、Ni和Pb的去除率79.91%、72.94%和75.98%。这为土壤重金属污染治理提供了一种高效、环保的联合修复方法,具有较高的应用价值。The aim of this paper was to investigate the effect of four drenching agents,deionized water,nitric acid,citric acid and EDTA,on heavy metal Cd,Ni and Pb contaminated soils,to screen out the optimal drenching agents,and to determine the optimal voltage and remediation time for electrokinetic remediation.The removal rate of heavy metals by four different drenching agents was compared by drenching experiments,and it was found that EDTA showed better removal effect with 70.18%,67.17%and 65.34%for heavy metals Cd,Ni and Pb,respectively.The optimal voltage of 1.5 v/cm and the optimal repair time of 5 d were screened in the electrodynamic repair experiments.Experiments combining the optimum drenching solution(EDTA)with the optimum electrokinetic remediation conditions(1.5 V/cm,5 d)showed that the combined technique removed 79.91%,72.94%and 75.98%of the heavy metals Cd,Ni and Pb from the soil.This study provides an eff icient and environmentally friendly joint remediation method for soil heavy metal pollution management,which has higher value of application.

关 键 词：土壤重金属污染 淋洗剂筛选 电动修复 镉 镍 铅 

分 类 号：X53[环境科学与工程—环境工程]