of a Spanish complex sulphide ore bulk concentrate.
thiooxidans plays a significant role in bioleaching
of metals from sulphide ores [14, 17, 18].
Role of galvanic interaction in the bioleaching
of Duluth-Gabbro Cu-Ni sulfides.
Together with Nippon Mining & Metals of Japan, Codelco created in 2003 Biosigma, injecting $20 million into a firm that researches new ways to use biotechnology to extract copper, a process known as bioleaching
. "We hope to have the first industrial and operational stages with this new technology running by early 2010," says Ricardo Badilla, Biosigma's general manager.
Treated wood, flaked or comminuted into particles, was remediated in 12-kg batches using oxalic acid extraction, followed by bioleaching
with the metal-tolerant bacterium Bacillus licheniformis.
Cheng, "SEM and AFM Images of Pyrite Surfaces after Bioleaching
by Indigenous Thiobacillus thiooxidans," Appl.
In one embodiment, the metal may be separated from crushed support material or ore in a bioleaching
lagoon by the action of hydrocarbon-utilizing bacteria under anaerobic conditions.
Rate of pyrite bioleaching
by Thiobacillus ferrooxidans: Results of an interlaboratory comparison.
Sand W, Tilman G, Jozsa PG, Schippers A (2001) Biochemistry of bacterial leaching--direct vs indirect bioleaching
. Hydrometallurgy 59, 159-175.
and interrelated acidophilic microorganisms from Rio Tinto, Spain.