Abstract
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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References
Blais JF, Tyagi RD, Auclair JC (1992) Comparison of acid and microbial leaching for metal removal from municipal sludge. Water Sci. Technol. 26: 197-206.
Couillard D, Zhu S (1992) Bacterial leaching of heavy metals from sewage sludge for agricultural application. Water Air Soil Pollut. 63: 67-80.
Green SC, Howgrave-Graham H, Mlondobozi S (1998) Heavy metal uptake during anaerobic digestion of combined electroplating and brewery wastewaters. Biotechnol. Lett. 20: 1081-1084.
Kelly DP, Wood AP (2000) Reclassification of some species of Thiobacillus to the newly designated genera Acidithiobacillus gen. nov., Halothiobacillus gen. nov. and Thermithiobacillus gen. nov. Int. J. Syst. Evol. Microbiol. 50: 511-516.
Oake RJ, Booker CS, Davis RD (1984) Fractionation of heavy metals in sewage sludges. Water Sci. Technol. 17: 587-598.
Sreekrishnan TR, Tyagi RD, Blais JF, Campbell PGC (1993) Kinetics of heavy metal bioleaching from sewage sludge-I. Effects of process parameters. Water Res. 27: 1641-1651.
Takahashi Y, Minai Y, Ambe S, Makide Y, Ambe F, Tominaga T (1997) Simultaneous determination of stability constants of humate complexes with various metal ions using multitracer technique. Sci. Total Environ. 198: 61-71.
Tyagi RD, Blais JF, Auclair JC, Meunier N (1993) Bacterial leaching of toxic metals from municipal sludge: influence of sludge characteristics. Water Environ. Res. 65: 196-204.
Tyagi RD, Sreekrishnan TR, Blais JF, Campbell PGC (1994) Kinetics of heavy metal bioleaching from sewage sludge-III. Temperature effects. Water Res. 28: 2367-2375.
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Villar, L.D., Garcia, O. Solubilization profiles of metal ions from bioleaching of sewage sludge as a function of pH. Biotechnology Letters 24, 611–614 (2002). https://doi.org/10.1023/A:1015010417315
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DOI: https://doi.org/10.1023/A:1015010417315