重金属污染土壤淋洗修复技术研究  

Research on Leaching Remediation Technology for Heavy Metal Contaminated Soil

作　　者：贾志青 Jia Zhiqing(Taiyuan Ecological Environment Monitoring and Scientific Research Center,Taiyuan Shanxi 030002,China)

机构地区：[1]太原市生态环境监测与科学研究中心,山西太原030002

出　　处：《山西化工》2024年第10期228-229,258,共3页Shanxi Chemical Industry

摘　　要：为评估不同淋洗剂在去除土壤中重金属(铅、镉、铜)效率及对土壤理化性质影响,本研究采用了实验方法,以草酸、硝酸、氢氧化钠、EDTA为例,研究这些淋洗剂对重金属污染土壤修复效果。通过调整淋洗剂浓度、淋洗时间及淋洗液与土壤的比例,优化了淋洗条件,详细分析了淋洗前后土壤p H值、电导率、有机质含量等理化性质的变化。结果表明,螯合剂EDTA在优化条件下对铅、镉、铜的去除效果最优,合理选择淋洗剂与优化淋洗条件对提高重金属去除效率及减少对土壤质量负面影响具有重要意义。In order to evaluate the efficiency of different leaching agents in removing heavy metals(lead,cadmium,copper)from soil and their effects on soil physicochemical properties,this study used experimental methods,taking oxalic acid,nitric acid,sodium hydroxide,and EDTA as examples,to study the remediation effect of these leaching agents on heavy metal contaminated soil.By adjusting the concentration of the leaching agent,leaching time,and the ratio of the leaching solution to the soil,the leaching conditions were optimized,and the changes in physical and chemical properties such as soil pH,conductivity,and organic matter content before and after leaching were analyzed in detail.The results showed that the chelating agent EDTA had the best removal effect on lead,cadmium,and copper under optimized conditions.Reasonable selection of leaching agents and optimization of leaching conditions are of great significance for improving heavy metal removal efficiency and reducing negative impacts on soil quality.

关 键 词：重金属污染 淋洗修复技术 淋洗剂 

分 类 号：X53[环境科学与工程—环境工程] X820.4