化工环保2024，Vol.44Issue(2)：230-234,5.DOI:10.3969/j.issn.1006-1878.2024.02.010
镉污染土壤淋洗修复技术研究
Research on leaching technology for cadmium contaminated soil
秦会敏 1郦和生 1谢文州 1胡永丰1
作者信息
- 1. 中石化(北京)化工研究院有限公司,北京 100013
- 折叠
摘要
Abstract
The cadmium contaminated soil was treated by shaking leaching method.The removal effect of different eluents on cadmium in contaminated soil,and the effects of eluent concentration,eluent pH,ratio of eluent volume to soil mass(liquid-soil ratio)were investigated.The distribution of cadmium forms before and after leaching was analyzed by Tessier sequential extraction method,and the recycling of waste leaching liquid was studied.The results indicate that:Edathamil disodium(EDTA-Na2)is an effective eluent for Cd contaminated soil,and when the EDTA-Na2 concentration is 0.03 mol/L,eluent pH is 3,and the liquid-soil ratio is 4∶1,the Cd removal rate can reach 73.27%;The major form of removed Cd is exchangeable speciation;The waste leaching liquid can be regenerated by dithiocarboxylic acid functionalized dendritic polymer(DPETA-CSSNa),and the Cd removal capability of the regenerated eluent is almost unchanged.关键词
乙二胺四乙酸二钠(EDTA-Na2)/淋洗/再生/镉/金属形态/土壤修复Key words
edathamil disodium(EDTA-Na2)/leaching/regeneration/cadmium/metal morphology/soil remediation分类
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秦会敏,郦和生,谢文州,胡永丰..镉污染土壤淋洗修复技术研究[J].化工环保,2024,44(2):230-234,5.
