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Mining Publication: Copper Exchange Capacity of Clays and Their Potential Effect on In Situ Copper Leaching

Original creation date: January 1992

Image of publication Copper Exchange Capacity of Clays and Their Potential Effect on In Situ Copper Leaching

The U.S. Bureau of Mines conducted Cu exchange tests for six common clays under simulated in situ leaching conditions. Regression equations were obtained from the data expressing the Cu exchange capacity as a function of Cu concentration, pH, and temperature. Using these equations, an analysis was made of the impact each clay could have on overall Cu recovery. The results suggest that Ca and Na montmorillonite clays could have a major impact on Cu recovery and that attapulgite and illite clays could have a smaller, but still significant, impact. Kaolinite and ripidolite clays pose little threat to loss of Cu from in situ leaching solutions.

Authors: JS Gomer, SW Yopps, SP Sandoval, CC Clark

Report of Investigations - January 1992

NIOSHTIC2 Number: 10011115

Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9396, 1992 Jan; :1-11

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