Bioleaching: metal solubilization by microorganisms
Clicks: 3
ID: 302651
1997
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Abstract
Bioleaching is a simple and effective technology for metal extraction from low-grade ores and mineral concentrates. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly Thiobacillus ferrooxidans and T. thiooxidans, which convert insoluble metal sulfides into soluble metal sulfates. Non-sulfide ores and minerals can be treated by heterotrophic bacteria and by fungi. In these cases metal extraction is due to the production of organic acids and chelating and complexing compounds excreted into the environment. At present bioleaching is used essentially for the recovery of copper, uranium and gold, and the main techniques employed are heap, dump and in situ leaching. Tank leaching is practised for the treatment of refractory gold ores. Bioleaching has also some potential for metal recovery and detoxification of industrial waste products, sewage sludge and soil contaminated with heavy metals.
| Reference Key |
openalex_W2105769874
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|---|---|
| Authors | Klaus Bosecker |
| Journal | FEMS microbiology reviews |
| Year | 1997 |
| DOI |
10.1111/j.1574-6976.1997.tb00340.x
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| URL | |
| Keywords | Keywords not found |
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