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The effect of xanthate floatation reagents on bacterial leaching of chalcopyrite byThiobacillus ferrooxidans

โœ Scribed by Hoon Yin Loon; John Madgwick

Publisher
Springer Netherlands
Year
1995
Tongue
English
Weight
224 KB
Volume
17
Category
Article
ISSN
0141-5492

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โœฆ Synopsis

Xanthate floatation compounds, added to cultures of Thiobacillus ferrooxidans leaching chalcopyrite, inhibited growth in the concentration range l-10 mM and caused a drop in formation of soluble copper and iron. Maximum (8090%) growth inhibition was at 10 mM for isobutyl-, amyl-and ethyl xanthate while isopropyl xanthate was innocuous but caused a four-fold increase in lag phase. Copper production was depressed by 30% for isopropyl-, 53% for isobutyl-, ethyl-and 77% for amyl xanthate at 10 mM additions.

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Short communication: Adverse effect of s
Short communication: Adverse effect of surface-active reagents on the bioleaching of pyrite and chalcopyrite byThiobacillus ferrooxidans
โœ G. Huerta; B. Escobar; J. Rubio; R. Badilla-Ohlbaum ๐Ÿ“‚ Article ๐Ÿ“… 1995 ๐Ÿ› Springer ๐ŸŒ English โš– 194 KB

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 โ‰ค 1 g/l. The reagents/l were adsorbed on the bacterial surface, decreasing the bacteria