Electrochemical study of inorganic and bacterial pyrite oxidation mechanism

ZEMAN, Josef. Electrochemical study of inorganic and bacterial pyrite oxidation mechanism. Mineralia Slovaca. Bratislava: Geocomplex, 1996, vol. 28, No 4, p. 399-402. ISSN 0369-2086.

Basic information

• Original name: Electrochemical study of inorganic and bacterial pyrite oxidation mechanism
• Authors: ZEMAN, Josef (203 Czech Republic, guarantor).
• Edition: Mineralia Slovaca, Bratislava, Geocomplex, 1996, 0369-2086.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10600 1.6 Biological sciences
• Country of publisher: Slovakia
• Confidentiality degree: is not subject to a state or trade secret
• RIV identification code: RIV/00216224:14310/96:00005864
• Organization unit: Faculty of Science
• Keywords in English: pyrite; oxidation; electrochemistry; bacteria
• Tags: bacteria, electrochemistry, oxidation, pyrite

Abstract

For detection of pyrite biooxidation there were prepared pyrite electrodes from pyrite corns with about 1 cm in diametr, mounted in epoxy resin and sticked on glas holders. Exchange current densities from potentiodynamic experiments gave direct rates of pyrite oxidation. There have been used three media for rate comparison of chemical and bacterial oxidation of pyrite: (1) H2SO4 with pH = 1.8, (2) Fe3+ in water with pH = 1.8, and (3) Thiobacillus ferooxidans in water with pH = 1.8. The exchange current density for pyrite biooxidation was about ten times higher than that for oxidation of pyrite by dissolved oxygen or Fe3+ and increased during all period of forty five days. Rates of inorganic pyrite oxidation was during all experiments low and after beginning increase were constant or decreasing.

Links

• MSM 143100005, plan (intention): Name: Strukturně-funkční vztahy biomolekul a jejich role v metabolismu

Investor: Ministry of Education, Youth and Sports of the CR, Biomolecular Structure-function Relationships and their role in the Metabolism