水资源与水工程学报2016，Vol.27Issue(1)：123-127,5.DOI:10.11705/j.issn.1672-643X.2016.01.22
河道底泥中重金属的EDTA淋洗研究
Study on EDTA washing of heavy metal in river sediment
摘要
Abstract
The paper took sediment from city river as the target and used EDTA washing to study the decontamination of sediment.It probed the influence of the factors such as EDTA concentration,washing time and liquid/solid ratio on washing efficiency for the purpose of providing parameters for real application.The result indicated that washing conditions such as EDTA concentration,washing time and liquid/solid ratio all have significant impact on washing effect.EDTA of 0.1 mol/L,liquid/solid ratio of 10∶1 can achieve the best result.70％-80％ of Cu and Cd could be removed after 30 min of washing.In addition,the form distribution of heavy metal in sediment before and after washing was compared.It investigated the combination way of sediment and heavy metal to affect washing efficiency.Washing by EDTA was more effective to heavy metal in exchangeable and carbonate-bound forms while relatively ineffective to Fe-Mn oxides,organics-bound species and residuals.Therefore,it is advisable to conduct the form analysis of heavy metal so as to decide whether EDTA is used for washing.关键词
河道底泥/乙二胺四乙酸(EDTA)/重金属/重金属淋洗Key words
river sediment/EDTA/heavy metal/washing/heavy metal分类
资源环境引用本文复制引用
王伟亚,陈维芳,张敬会,黄思思,李玉祥..河道底泥中重金属的EDTA淋洗研究[J].水资源与水工程学报,2016,27(1):123-127,5.基金项目
上海市自然科学基金项目(14ZR1428900) （14ZR1428900）
上海市科委能力建设项目(13230502300) （13230502300）
教育部留学回国科研启动基金(SEM2013) （SEM2013）
上海市研究生创新基金项目(JWCXSL1402) （JWCXSL1402）
