Solubilization profiles of metal ions from bioleaching of sewage sludge as a function of pH
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2002-04-01
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Kluwer Academic Publ
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Two patterns of solubilization of metal ions resulting from bioleaching of sewage sludge by sulphur-oxidizing Thiobacillus spp. were established as a function of pH. Chromium and copper ions required a pH of 2-3 to initiate their solubilization, whereas nickel and zinc ions had their solubilization initiated at pH 6-6.5. The patterns obtained were independent of the sludge solids concentrations investigated (10, 17, 25, 32.5 and 40 g l(-1)).
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Biotechnology Letters. Dordrecht: Kluwer Academic Publ, v. 24, n. 8, p. 611-614, 2002.
