期刊
HYDROMETALLURGY
卷 131, 期 -, 页码 138-143出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2012.11.010
关键词
Column bioleaching; Electronic scrap; Moderate thermophiles
In this study, ability of moderately thermophilic bacterial consortium to extract metals from electronic scrap was evaluated using shake flasks and lab-scale column reactor. We investigated the effects of having additional energy source (FeS2, S-0, FeS2 + S-0), using different consortia of moderately thermophilic bacteria and washing charge material as a pretreatment. At scrap concentrations of 10%, an adapted consortium of Sulfobacillus thermosulfidooxidans and Thermoplasma acidophilum extracted approximately 85% of Cu, 75% of Al, 80% of Ni and 80% of Zn from pretreated electronic scrap with FeS2+S-0 (1%). However, a consortium of S. thermosulfidooxidans and Sulfobacilllus acidophilus, containing FeS2 + S-0, extracted 90% of Cu, 80% of Al, 82% of Ni and 85% of Zn. During column bioleaching studies of 165 days, approximately 74% Zn, 68% Al, 85% Cu, 78% Ni was leached out. The results of the leaching process are significant for understanding how to implement these processes on an industrial scale. (C) 2012 Elsevier B.V. All rights reserved.
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