Oxidation of stibnite byThiobacillus ferrooxidans |
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| Authors: | A E Torma G G Gabra |
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| Institution: | (1) Department of Metallurgical and Materials Engineering, New Mexico Institute of Mining and Technology, 87801 Socorro, New Mexico, USA;(2) Département des Sciences Pures, Université du Québec à Rimouski, Québec, Canada |
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| Abstract: | Optimum pH, temperature and pulp density for microbiological leaching of museum-grade stibnite mineral has been investigated
using a stibnite-adapted strain ofThiobacillus ferrooxidans. Optimum conditions were found to be pH 1.75, 35 C and 12 g solid substrate per 100 ml of basal salts medium as the initial
dose. The energy of activation was determined to be 16.8 kcal per mole, and the temperature coefficient 2.2. The highest total
dissolved-antimony concentration, Sbt] = Sb+3] + Sb+5] + SbO+] + SbO2
+], was about 1400 mg/litre, due to relatively low solubility of (SbO)2SO4 and (SbO2)2SO4. |
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