Short communication: Adverse effect of surface-active reagents on the bioleaching of pyrite and chalcopyrite by Thiobacillus ferrooxidans |
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| Authors: | G Huerta B Escobar J Rubio R Badilla-Ohlbaum |
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| Institution: | (1) Departamento de Ingeniería Química. Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Casilla 2777, Santiago, Chile;(2) Departamento de Ingenieria de Minas, Universidad Federal de Rio Grnade do Sul, Porto Alegre, 99/513 Av. O. Aranha, Brazil |
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| Abstract: | Oxidation of Fe(II) iron and bioleaching of pyrite and chalcopyrite by Thiobacillus ferrooxidans was adversely affected by isopropylxanthate, a flotation agent, and by LIX 984, a solvent-extraction agent, each at  1 g/l. The reagents/l were adsorbed on the bacterial surface, decreasing the bacteria's development and preventing biooxidation. Both reagents inhibited the bioleaching of pyrite and LIX 984 also inhibited the bioleaching of chalcopyrite. |
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| Keywords: | Bioleaching chalcopyrite flotation agent pyrite solvent extraction Thiobacillus ferrooxidans |
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