Electrochemistry of Thiobacillus ferrooxidans reactions with pyrite. Technical progress report, Second quarter 1990

Technical Report · Mon Dec 31 00:00:00 EST 1990

OSTI ID:10154100

Pesic, B

The present investigation is a part of our studies on the electrochemical aspects of pyrite bioleaching involving Thiobacillus ferrooxidans. Previously we have examined the effect of T. ferrooxidans and their metabolic products on the redox reactions of Fe{sup 2+}/Fe{sup 3+} couple at the pyrite surface. Results obtained suggest that beyond 1.5 days during their growth in a batch fermenter, the bacteria and their metabolic products completely cover the pyrite surface and shut down all electron transfer across the electrode-solution interface. In addition, it has been observed that the bacteria serve as the nucleation site for jarosite formation, which is found detrimental to bioleaching. In the present work we have focused on the effect of the presence of vitamins on the redox chemistry of iron. To date, we have examined the effect of the presence of thiamine pyrophosphate in the redox behavior of Fe{sup 2+}/Fe{sup 3+} at the pyrite surface. The results are described herein.

• Research Organization: Idaho Univ., Moscow, ID (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-88PC88920
• OSTI ID: 10154100
• Report Number(s): DOE/PC/88920-T15; ON: DE92015489
• Resource Relation: Other Information: PBD: [1990]
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
59 BASIC BIOLOGICAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PYRITE
BIODEGRADATION
COAL
DESULFURIZATION
PROGRESS REPORT
ELECTROCHEMISTRY
THIOBACILLUS FERROXIDANS
PHOSPHATES
THIAMINE
REDOX REACTIONS
IRON COMPOUNDS
SURFACE PROPERTIES
010402
550700
400400
PURIFICATION AND UPGRADING
MICROBIOLOGY