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Recovery of heavy metals from industrial sludge using various acid extraction approaches.
- Source :
- Water Science & Technology; 2009, Vol. 59 Issue 2, p289-293, 5p, 3 Charts, 3 Graphs
- Publication Year :
- 2009
-
Abstract
- Heavy metals were removed from industrial sludge by traditional and microwave-assisted acid extraction approaches. The effects of acid concentration, extraction time, sludge particle size and solid/liquid (S/L) ratio on copper-extraction efficiency were assessed. Leaching with increased acid concentrations increased the yield of heavy metals from the industrial sludge. In microwaveassisted acid extraction, reducing the S/L ratio and sludge particle size increased copperextraction efficiency. These experimental findings indicate that S/L ratio most strongly influenced microwave-assisted acid extraction. Both traditional and microwave-assisted acid extraction demonstrate that sulfuric acid was an effective extractant, and the copper fraction in extracted sludge shifted from being primarily bound to Fe-Mn oxides and organic-matter partition, to being mostly bound to organic matter, remaining as a residue during acid extraction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02731223
- Volume :
- 59
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Water Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 36333826
- Full Text :
- https://doi.org/10.2166/wst.2009.859