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Comparison of methods used to inhibit bacterial activity in sulfide ore bioleaching studies.

Authors
Brickett-LA; Hammack-RW; Edenborn-HM
Source
Hydrometallurgy 1995 Oct; 39(1):293-305
NIOSHTIC No.
10005912
Abstract
Eight methods of ore sterilization, including steam autoclaving, dry heat, tyndallization, cobalt-60 irradiation, thymol (5-methyl-2-(1-methylethyl) phenol) and mercuric chloride additions, were tested using a monzonite porphyry copper ore containing chalcocite, chalcopyrite, pyrite, and minor molybdenite. All treatments were found to effectively eliminate iron-oxidizing bacteria added to the ore. Heating methods were found to be effective sterilization procedures and to have a minimal influence on the leaching characteristics of the ore. However, gamma irradiation and the additions of thymol and mercuric chloride significantly altered the ore and suppressed the abiotic leaching rate. Results suggest that previous bioleaching studies using thymol as a bacterial inhibitor may have overestimated the bacterial role in ore leaching.
CODEN
HYDRDA
Publication Date
19951001
Document Type
Journal Article
Fiscal Year
1996
NTIS Accession No.
NTIS Price
Identifying No.
OP 198-95
Issue of Publication
1
ISSN
0304-386X
NIOSH Division
PRC
Source Name
Hydrometallurgy
State
PA
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