文章基本信息

标题：Efficiency of Washing Techniques for Removal of Heavy Metals from Industrial Sludge
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作者：Sumalatha, J. ; Sumalatha, J. ; Naveen B. P. 等
期刊名称：Pollution
印刷版ISSN：2383-451X
电子版ISSN：2383-4501
出版年度：2019
卷号：5
期号：1
页码：189-198
DOI：10.22059/poll.2018.264574.507
语种：English
出版社：University of Tehran
摘要：The effluent treatment plant sludge is one of the major sources of contamination with toxic metals. Since the sludge contains heavy metals, it must be pretreated to reduce the contamination. The heavy metals from the sludge can be reduced/ separated by washing it with a suitable leaching solution. In the present study, the efficiencies of three leaching solutions to remove the contaminants from an industrial sludge were studied and the leaching process was modeled. The leaching solutions used are 0.1 N HCl, 0.1 N EDTA and 0.1 N FeCl3. The efficiencies of leaching solutions were assessed by conducting column leaching experiments on the sludge and the migration rates of heavy metal ions of Cu, Zn, Ni, Cd, Pb, Fe and Cr present in the sludge were estimated. These migration rates are useful to estimate the quantity of leaching solution required at the site to achieve the required levels of concentrations in the sludge.
关键词：Contaminants; Leaching solution; Dispersion coefficient; Retardation factor