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The oxidation of sulfide minerals in waste rock has the potential to generate low-quality drainage that can present a significant challenge to mine owners, regulators, and other stakeholders. Challenges involved in managing waste rock include the large volume of waste rock produced and the difficulty in predicting the quality and quantity of leach water due to the chemical and physical heterogeneities...
The equilibrium and kinetics for the adsorption of gold onto activated carbon from acidic thiourea solutions have been studied. The equilibrium gold loading decreases with increasing thiourea concentration, pH and temperature. The gold loading is not affected by small amounts of Fe 2+ or Fe 3+ , but is greatly lowered by Cu 2+ presumably through competitive adsorption...
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