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Effect of competing ions on copper exchange by clays.

Authors
Bush-RP; Schultze-LE
Source
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9509, 1994 Jan; :1-15
Link
NIOSHTIC No.
20039282
Abstract
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.
Keywords
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
Publication Date
19940101
Document Type
Report of Investigations
Fiscal Year
1994
NTIS Accession No.
PB95-104121
NTIS Price
A03
Identifying No.
RI-9509
NIOSH Division
RERC
Source Name
Reno, NV: U.S. Department of the Interior, Bureau of Mines, RI 9509
State
NV
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