Abstract
Experiments were conducted to determine and model the effect of cadmium and zinc ions in solution on the removal of Cr(VI) via ion exchange with hydrotalcite, a clay mineral media. Because many locations that have contaminated groundwater are located in colder climates, the ion exchange process was first characterized as a function of temperature. Binary solutions of Cr(VI) with either cadmium or zinc were investigated followed by a factorial design of ternary systems. Isotherms were modeled and used to compare removal of Cr(VI) in a single ion solution to multi-ion systems. Fixed-effect analysis of variance, PROC GLM (SAS Version 9), was used to analyze main and interactive effects. Results indicated that, while temperature did not significantly affect removal of Cr(VI), both Zn and Cd did reduce Cr(VI) ion exchange, most likely due to the formation of ionic complexes. Also, interactions between all three metal species ion the ternary system negatively affected removal of Cr.
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Terry, P.A., Dolan, D.M., Axness, K. (2012). Effect of Temperature, Zinc, and Cadmium Ions on the Removal of Cr(VI) from Aqueous Solution via Ion Exchange with Hydrotalcite. In: Inamuddin, D., Luqman, M. (eds) Ion Exchange Technology II. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4026-6_13
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DOI: https://doi.org/10.1007/978-94-007-4026-6_13
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