Effect of competing ions on copper exchange by clays.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9509, 1994 Jan; :1-15
The U.S. Bureau of Mines performed Cu exchange capacity (CuEC) tests on Ca and Na montmorillonites and attapulgite clays. Mathematical models were developed from the data which give CuEC's for each clay as a function of pH, Cu concentration, and the concentrations of metal ions which compete with Cu for exchange sites. An analysis was made of the impact of competing ions on Cu losses due to ion exchange. The results show that the CuEC of clays, and hence Cu losses, are decreased by the presence of competing ions, and that Al and Mg have the largest impact of those cations normally present in Cu leaching solutions.
Mining; Research-and-development; Leaching; pH; Concentration-composition; Mathematical-models; Regression-analysis; Cations; Metallurgy; Materials-recovery; Experimental-design; Soil-chemistry; Copper; Clays; Ion-exchanging; Mathematical-models
Report of Investigations
NTIS Accession No.
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9509