Copper and antimony extraction from tetrahedrite‐containing dolomite heterotrophic bacteria
作者:
Hermann Strasser,
Wolfgang Burgstaller,
Franz Schinner,
期刊:
Geomicrobiology Journal
(Taylor Available online 1990)
卷期:
Volume 8,
issue 2
页码: 109-117
ISSN:0149-0451
年代: 1990
DOI:10.1080/01490459009377884
出版商: Taylor & Francis Group
关键词: Heterotrophic leaching;bacteria;Pseudomonas;antimony;copper;tetrahedrite;dolomite
数据来源: Taylor
摘要:
Three hundred and thirty‐five strains of heterotrophic bacteria, isolated from various metal‐containing ores, were tested in submerged culture for their capacity to leach copper and antimony from tetrahedrite‐containing dolomitic ore (particle size <0.1 mm; Schwaz, Austria). Experiments showed that after 8 days of incubation, it was possible to differentiate between active and inactive strains. Maximum extraction values for copper (1.0%) and antimony (1.6%) were achieved withPseudomonasspp. after 8 days. Final pH values were 6.8 in sterile controls and slightly alkaline (up to pH 8.3) in inoculated flasks. Starch and glutamine (C/N ratio of 50:1) proved to be the best carbon and nitrogen sources for growth. Variation of the C/N source resulted in only a very slight increase in the rates of extraction for copper and antimony. Not even 24 h preliminary incubation of a culture before the ore was added improved metal extraction.
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