1996
Electrochemical study of inorganic and bacterial pyrite oxidation mechanism
ZEMAN, JosefZákladní údaje
Originální název
Electrochemical study of inorganic and bacterial pyrite oxidation mechanism
Autoři
ZEMAN, Josef (203 Česká republika, garant)
Vydání
Mineralia Slovaca, Bratislava, Geocomplex, 1996, 0369-2086
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10600 1.6 Biological sciences
Stát vydavatele
Slovensko
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14310/96:00005864
Organizační jednotka
Přírodovědecká fakulta
Klíčová slova anglicky
pyrite; oxidation; electrochemistry; bacteria
Štítky
Změněno: 20. 5. 2003 16:30, doc. RNDr. Josef Zeman, CSc.
Anotace
V originále
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.
Návaznosti
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