Enhancement of bioleach systems using nutrient additives

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

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423DIG17, C22B 1104

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active

054136245

ABSTRACT:
Materials and methods for the enhancement of the biooxidative acid leaching of heavy metals from sulfide ore are disclosed and claimed. The enhancement of bioleach solutions with a nutrient supplement selective for a particular sulfide oxidizing strain of bacteria significantly increases copper solubilization of chalcopyrite ore. Likewise, copper solubilization is enhanced by enriching bioleach solutions with a non-selective growth mediums.

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