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Effect of carbon dioxide concentration on the bioleaching of a pyrite–arsenopyrite ore concentrate
Author(s) -
Nagpal Soumitro,
Dahlstrom Donald,
Oolman Timothy
Publication year - 1993
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260410409
Subject(s) - arsenopyrite , bioleaching , carbon dioxide , pyrite , chemistry , leaching (pedology) , slurry , bacterial growth , environmental chemistry , pulp and paper industry , metallurgy , mineralogy , chalcopyrite , environmental engineering , materials science , bacteria , environmental science , geology , organic chemistry , paleontology , copper , soil science , engineering , soil water
The effect of carbon dioxide concentration on the bacterial leaching of a pyrite‐arsenopyrite ore concentrate was studied in continuous‐flow reactors. Steady‐state operation with two feed slurry densities, 6 wt% and 16 wt% solids, were tested for the effect of carbon dioxide concentration. Bacterial growth rates were estimated via the measurement of carbon dioxide consumption rates. Aqueous‐phase carbon dioxide concentrations in excess of 10 mg/L were found to be inhibitory to bacterial growth. © 1993 John Wiley & Sons, Inc.