GREEN MINING: PROCESS OF CYANIDE-FREE BIOLEACHING AND BIOADSORPTION OF PRECIOUS METALS

摘要

The present invention relates to a cyanide-free process of isolating precious metal gold from a particulate material containing said metal, comprising the following steps of (i) prepar-ing an aqueous mixture containing said particulate material and biomass comprising having an S--LAYER or archaea having an S-LAYER; eubacte-ria and archaea, algae, and fungi; said biomass be-ing capable of adsorbing said metal; (ii) incubating said aqueous mixture of step (i) for allowing bind-ing of said metal to said biomass; (iii) separating the biomass having bound metal from the aqueous mixture of step (ii); and (iv) isolating the metal from said biomass separated in step (iii).