The effect of thiobacillus ferrooxidans on argentite, stibnite, and a stibnite-silver ore
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Authors
Hoffman, Lee E.
Issue Date
1975
Type
Thesis
Language
en_US
Keywords
Thiobacillus Terroxidans , Silver Sulfide Ores , Silver Bearing Antimony Sulfide Ores , Artificial Silver Sulfide , Artificial Antimony Sulfide , Natural Stibnite Ore , Muttleberry Canyon Mine , Pershing County , Nevada , T. Ferroxidans , Leaching , Metallurgical engineering , Stibnite-silver Ore , Mackay Theses and Dissertations Grant Collection
Alternative Title
Abstract
Experiments were performed to determine the usefulness of Thiobacillus terrooxidans in treating silver sulfide ores and silver bearing antimony sulfide ores. Tests were conducted on artificial silver sulfide, artificial antimony sulfide, and natural stibnite ore with silver from the Muttleberry Canyon Mine in Pershing County, Nevada. The bacterium was unable to leach silver. This was shown to be caused by the toxicity of the silver to the microorganisms. Silver was shown to be toxic at levels of 1.0 ppm and higher and inhibitive at levels down to 0.01 ppm. Leaching of artificial stibnite was enhanced by
T. ferroxidans. Batch tests with bacteria present concentrations of 1 65 ppm Sb, while the sterile runs only reached 3 5 ppm. Batch test s also showed aeration to be an important consideration in the leaching process. Sterile and inoculated continuous run s leached 0 .0238 grams and 0. 2323 gra.'11s of antimony respectively. Muttleberry Canyon ore was not amenable to this treatment because its presence is inhibitive to bacterial growth.
Description
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Citation
Publisher
University of Nevada, Reno
License
In Copyright(All Rights Reserved)