Prior investigators have implicated kinetic limitations as being significant in the regulation of metal removal by precipitation processes. However, there have been no prior direct measurements on rates of such processes with the environmentally more significant metals. This study measured homogeneous complexation rates of cadmium and copper with hydroxide in a complete mix continuous flow reactor, using ion specific electrodes. The cadmium complexation kinetics are consistent with a forward mixed second order process coupled with a reverse first order process, and such model provides agreement with reported equilibrium constants for the formation of CdOH+.
Kinetics of Cadium and Copper Hydrolysis
J. W. Patterson, C. N. Haas, R. J. Vamos, E. Cooney; Kinetics of Cadium and Copper Hydrolysis. Water Sci Technol 1 May 1987; 19 (5-6): 1021–1027. doi: https://doi.org/10.2166/wst.1987.0279
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