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Title: | Leaching uranium from carbonate ore using Thiobacillus thiooxidans (S-V) |
Authors: | Khalid, ZM; Mahmood, T; Malik, Dr. Kauser .A. |
Keywords: | leaching carbonate uranium |
Issue Date: | 1990 |
Publisher: | EPA ( environmental protection agency ) |
Citation: | Leaching uranium from carbonate ore using Thiobacillus thiooxidans (S-V),, Volume 1 Issue 4 Page Numbers 291-302 |
Series/Report no.: | Volume 1 Issue 4 Page Numbers 291-302; |
Abstract: | BIOSIS COPYRIGHT: BIOL ABS. By appropriate enrichment of solid and liquid samples collected from mining, processing, overburden and process waste of uranium ore, a number of acidophilic, chemoautotrophic sulphur oxidizers resembling Thiobacillus thiooxidans have been isolated. These were compared for their rate of sulphur oxidation and the best strain, T. thiooxidans (S-V) was used for leaching studies. Carbonate bearing sandstone uranium ore found in Pakistan requires 10-13 g H2SO4 for every 100 g ore to solubilize above 90%. When the selected strain, T. thiooxidans (S-V) was grown on mineral salt medium supplied with sulphur as the source of energy, it could produce 25 g/l H2SO4 in the medium dropping the pH from 2.5 to 0.87 in 18 days. A suspension of 5% w/v slurry of uranium ore in mineral salt medium supplied with elemental sulphur (1%) and sodium thiosulphate (1%) resulted in a pH of 5.9. Using controlled conditions in a bioreactor (Biostat E), the pH dropped to 2.1 within three days after i |
Description: | ISSN: 0269-7572 |
URI: | http://localhost:8080/xmlui/handle/123456789/1387 |
ISSN: | ISSN: 0269-7572 |
Appears in Collections: | School of Life Sciences |
Files in This Item:
File | Description | Size | Format | |
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leaching uranium from carbonate ore using.pdf | 3.08 MB | Adobe PDF | View/Open |
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