农业环境科学学报2013，Vol.32Issue(8)：1552-1557,6.DOI:10.11654/jaes.2013.08.009
微波强化EDDS淋洗修复重金属污染土壤研究
Microwave-enhanced Remediation of Cd, Pb and Zn Contaminated Soil Using EDDS as a Leaching Agent
摘要
Abstract
With the rapid industrialization and urbanization in the world,soil pollution is intensifying,especially heavy metal contamination.A new approach using microwave coupled to EDDS as a leaching agent for removal of Cd,Pb,and Zn from field soils was examined in the laboratory.Effects of time and power of microwave on removal efficiency and fractionation of heavy metals were investigated.The results showed that under microwave condition(900 W,10 min),the removal efficiencies of Cd,Pb,and Zn were 29％,89％,and 71％,respectively,increased by 8％,26％,and 33％,respectively,compared with those without microwave treatment.In addition,the processing time was greatly reduced from 6 h to 10 min.Sequential extraction results showed that the exchangeable,carbonate bound and Fe-Mn oxide bound fractions of metal concentrations were obviously reduced after treatment,by 34％,90％,and 83％ for Cd,Pb,and Zn,respectively,whereas the residual fraction was increased,which reduces ecological risks of heavy metals.Microwave-assisted leaching can be a promising remediation method for heavy metal contaminated sites.关键词
重金属污染/土壤淋洗/微波强化/EDDSKey words
Cd/ Pb/ Zn/ leaching/ microwave-enhanced/ EDDS分类
资源环境引用本文复制引用
薛腊梅,刘志超,尹颖,孙媛媛,郭红岩..微波强化EDDS淋洗修复重金属污染土壤研究[J].农业环境科学学报,2013,32(8):1552-1557,6.基金项目
江苏省六大人才高峰项目资助(2012-JNHB-011) （2012-JNHB-011）
