標題: Bioleaching of heavy metals from contaminated sediment by indigenous sulfur-oxidizing bacteria in an air-lift bioreactor: effects of sulfur concentration
作者: Chen, SY
Lin, JG
環境工程研究所
Institute of Environmental Engineering
關鍵字: bioleaching;indigenous;sediment;heavy metal;sulfur concentration;Thiobacilli species
公開日期: 1-Aug-2004
摘要: The effects of sulfur concentration on the bioleaching of heavy metals from the sediment by indigenous sulfuroxidizing bacteria were investigated in an air-lift reactor. Increasing the sulfur concentration from 0.5 to 5 g/l enhanced the rates of pH reduction, sulfate production and metal solubilization. A Michaelis-Menten type equation was used to explain the relationships between sulfur concentration, sulfate production and metal solubilization in the bioleaching process. After 8 days of bioleaching, 97-99% of Cu, 96-98% of Zn, 62-68% of Mn, 73-87% of Ni and 31-50% of Pb were solubilized from the sediment, respectively. The efficiency of metal solubilization was found to be related to the speciation of metal in the sediment. From economical consideration, the recommended sulfur dosage for the bioleaching of metals from the sediment is 3 g/l. (C) 2004 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.watres.2004.04.050
http://hdl.handle.net/11536/26513
ISSN: 0043-1354
DOI: 10.1016/j.watres.2004.04.050
期刊: WATER RESEARCH
Volume: 38
Issue: 14-15
起始頁: 3205
結束頁: 3214
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