Leaching of pyrites of various reactivities by Thiobacillus ferrooxidans
- Univ. di Siena (Italy)
- US Department of Energy, Pittsburgh, PA (United States)
Variations were found in the rate of chemical and microbiological leaching of iron from pyritic materials from various sources. Thiobacillus ferrooxidans accelerated leaching of iron from all of the pyritic materials tested in shake flask suspensions at loadings of 0.4% (wt/vol) pulp density. The most chemically reactive pyrites exhibited the fastest bioleaching rates. However, at 2.0% pulp density, a delay in onset of bioleaching occurred with two of the pyrites derived from coal sources. T. ferrooxidans was unable to oxidize the most chemically reactive pyrite at 2.0% pulp density. No inhibition of pyrite oxidation by T. ferrooxidans occurred with mineral pyrite at 2.0% pulp density. Experiments with the most chemically reactive pyrite indicated that the leachates from the material were not inhibitory to iron oxidation by T. ferrooxidans.
- OSTI ID:
- 6893773
- Journal Information:
- Applied and Environmental Microbiology; (United States), Journal Name: Applied and Environmental Microbiology; (United States) Vol. 58:6; ISSN AEMIDF; ISSN 0099-2240
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BACILLUS
BACTERIA
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
DESULFURIZATION
DISSOLUTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GROWTH
LEACHING
MATERIALS
METABOLISM
MICROORGANISMS
MINERALS
PYRITE
SEPARATION PROCESSES
SULFIDE MINERALS
SULFUR-OXIDIZING BACTERIA
THIOBACILLUS FERROXIDANS