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A platform for research: civil engineering, architecture and urbanism
Bacterial Leaching of Minerals
Abstract The bioleaching process has been restricted to copper and uranium extraction using heap, dump and in situ leaching technologies from mining wastes and low grade mineral resources. In these, the contribution of microorganisms was not appreciated. Thiobacillus ferrooxidans, the most studied microorganism, has been found responsible for the oxidation of metal sulphides. Later, the discovery of new microorganisms, as moderately, extremely thermophilic bacteria and heterotropic microorganisms and the understanding of the mechanism of leaching extended the possibilities of the bioleaching process. Moreover, progress in reactor design and kinetics of the process made the adoption of biooxidation, as a pretreatment to cyanidation, in the extraction of gold from refractory sulphide-bearing ores and concentrates. The existence of biooxidation plants in different parts of the world is showing the economical viability of the process. The success in biooxidation at extreme temperatures and biodegradation of highly refractory base metal sulphide mineral promises that this technology will be commercially used in the next years. Bacterial leaching is presented as an environmentally and economically alternative technology for the mineral industry.
Bacterial Leaching of Minerals
Abstract The bioleaching process has been restricted to copper and uranium extraction using heap, dump and in situ leaching technologies from mining wastes and low grade mineral resources. In these, the contribution of microorganisms was not appreciated. Thiobacillus ferrooxidans, the most studied microorganism, has been found responsible for the oxidation of metal sulphides. Later, the discovery of new microorganisms, as moderately, extremely thermophilic bacteria and heterotropic microorganisms and the understanding of the mechanism of leaching extended the possibilities of the bioleaching process. Moreover, progress in reactor design and kinetics of the process made the adoption of biooxidation, as a pretreatment to cyanidation, in the extraction of gold from refractory sulphide-bearing ores and concentrates. The existence of biooxidation plants in different parts of the world is showing the economical viability of the process. The success in biooxidation at extreme temperatures and biodegradation of highly refractory base metal sulphide mineral promises that this technology will be commercially used in the next years. Bacterial leaching is presented as an environmentally and economically alternative technology for the mineral industry.
Bacterial Leaching of Minerals
Frutos, F. J. Garcia (author)
1998-01-01
30 pages
Article/Chapter (Book)
Electronic Resource
English
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