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Efficiency of Washing Techniques for Removal of Heavy Metals from Industrial Sludge | ||
| Pollution | ||
| مقاله 15، دوره 5، شماره 1، فروردین 2019، صفحه 189-198 اصل مقاله (678.81 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/poll.2018.264574.507 | ||
| نویسندگان | ||
| Sumalatha J.1؛ Naveen B. P.* 2؛ Malik R. K.2 | ||
| 1Department of Civil Engineering, Ramaiah Institute of Technology, Bangalore-560054, India | ||
| 2Department of Civil Engineering, Amity School of Engineering and Technology Amity University Gurgaon, Haryana-122413, India. | ||
| چکیده | ||
| 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. | ||
| کلیدواژهها | ||
| Contaminants؛ Leaching solution؛ dispersion coefficient؛ Retardation factor | ||
| مراجع | ||
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