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Selective copper–iron dissolution from a molybdenite concentrate using bacterial leaching
Author(s) -
Romano Patricia,
Blázquez María Luisa,
Ballester Antonio,
González Felisa,
Alguacil Francisco José
Publication year - 2001
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.443
Subject(s) - molybdenite , copper , dissolution , mesophile , chalcopyrite , thermophile , chemistry , leaching (pedology) , metallurgy , bioleaching , copper extraction techniques , microorganism , bacteria , materials science , geology , biochemistry , organic chemistry , paleontology , quartz , fluid inclusions , soil science , soil water , enzyme
The present research reports on the selective dissolution of copper and iron from a Chilean molybdenite concentrate using mesophilic, moderate and extreme thermophilic culture bacteria. From the results obtained it is deduced that molybdenite is not attacked by any of the above mentioned microorganisms, whereas the attack of the copper–iron species is dependent on various experimental conditions: pH, potential, pulp density, or addition of silver as catalyst. Optimal copper–iron dissolution is obtained using extreme thermophilic microorganisms and low pulp density (2% w/v). Total selective dissolution of chalcopyrite is achieved which leads to a pure molybdenite concentrate being obtained. © 2001 Society of Chemical Industry