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Title: Corrosion and electrochemical oxidation of a pyrite by Thiobacillus ferrooxidans

Abstract

The oxidation of a pure pyrite by Thiobacillus Ferrooxidans is not really a constant phenomenon; it must be considered to be more like a succession of different steps which need characterization. Electrochemical studies using a combination of a platinum electrode and a specific pyrite electrode (packed-ground-pyrite electrode) revealed four steps in the bioleaching process. Each step can be identified by the electrochemical behavior (redox potentials) of pyrite, which in turn can be related to chemical (leachate content), bacterial (growth), and physical (corrosion patterns) parameters of the leaching process. A comparison of the oxidation rates of iron and sulfur indicated the nonstoichiometric bacterial oxidation of a pure pyrite in which superficial phenomena, aqueous oxidation, and deep crystal dissolution are successively involved.

Authors:
;  [1]; ;  [2]
  1. Univ. de Nancy I, Notre-Dame-des-Pauvres (France)
  2. Environnement et Mineralurgie, Vandaeuvre-les-Nancy (France)
Publication Date:
OSTI Identifier:
7044733
Resource Type:
Journal Article
Journal Name:
Applied and Environmental Microbiology; (United States)
Additional Journal Information:
Journal Volume: 58:4; Journal ID: ISSN 0099-2240
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; PYRITE; MICROBIAL LEACHING; THIOBACILLUS FERROXIDANS; METABOLISM; ELECTROCHEMISTRY; IRON; OXIDATION; REDOX POTENTIAL; REDOX REACTIONS; SULFUR; BACILLUS; BACTERIA; CHEMICAL REACTIONS; CHEMISTRY; DISSOLUTION; ELEMENTS; LEACHING; METALS; MICROORGANISMS; MINERALS; NONMETALS; SEPARATION PROCESSES; SULFIDE MINERALS; SULFUR-OXIDIZING BACTERIA; TRANSITION ELEMENTS; 560300* - Chemicals Metabolism & Toxicology

Citation Formats

Mustin, C, Berthelin, J, Marion, P, and Donato, P de. Corrosion and electrochemical oxidation of a pyrite by Thiobacillus ferrooxidans. United States: N. p., 1992. Web.
Mustin, C, Berthelin, J, Marion, P, & Donato, P de. Corrosion and electrochemical oxidation of a pyrite by Thiobacillus ferrooxidans. United States.
Mustin, C, Berthelin, J, Marion, P, and Donato, P de. 1992. "Corrosion and electrochemical oxidation of a pyrite by Thiobacillus ferrooxidans". United States.
@article{osti_7044733,
title = {Corrosion and electrochemical oxidation of a pyrite by Thiobacillus ferrooxidans},
author = {Mustin, C and Berthelin, J and Marion, P and Donato, P de},
abstractNote = {The oxidation of a pure pyrite by Thiobacillus Ferrooxidans is not really a constant phenomenon; it must be considered to be more like a succession of different steps which need characterization. Electrochemical studies using a combination of a platinum electrode and a specific pyrite electrode (packed-ground-pyrite electrode) revealed four steps in the bioleaching process. Each step can be identified by the electrochemical behavior (redox potentials) of pyrite, which in turn can be related to chemical (leachate content), bacterial (growth), and physical (corrosion patterns) parameters of the leaching process. A comparison of the oxidation rates of iron and sulfur indicated the nonstoichiometric bacterial oxidation of a pure pyrite in which superficial phenomena, aqueous oxidation, and deep crystal dissolution are successively involved.},
doi = {},
url = {https://www.osti.gov/biblio/7044733}, journal = {Applied and Environmental Microbiology; (United States)},
issn = {0099-2240},
number = ,
volume = 58:4,
place = {United States},
year = {Wed Apr 01 00:00:00 EST 1992},
month = {Wed Apr 01 00:00:00 EST 1992}
}