A kinetic study of copper ion exchange by Kelex 100 at a heptane-water interface
- Univ. of Melbourne, Parkville, Victoria (Australia)
A study of the kinetics of Cu{sup 2+} extraction by 7-(4-ethyl-1-methyloctyl)8-hydroxyquinoline (Kelex 100) has been undertaken in a static transfer cell, where the total concentration of the Cu{sup 2+}-Kelex 100 complex in the organic phase is monitored in situ as the reaction proceeds using attenuated total internal reflectance spectroscopy. The temporal characteristics of the extraction of Cu{sup 2+} from water into heptane could be accounted for using a simple one-dimensional diffusion model coupled with a reaction-limited interaction between Cu{sup 2+} and Kelex 100. Rate constants for the reaction of Kelex 100 and Cu{sup 2+} at a model interface were obtained from stopped flow experiments using a neutral micelle (C{sub 12}E{sub 8}) system. These rate constants were used to model the reaction between Cu{sup 2+} and Kelex 100 at the heptane-water interface.
- OSTI ID:
- 419828
- Journal Information:
- Journal of Colloid and Interface Science, Vol. 184, Issue 2; Other Information: PBD: 25 Dec 1996
- Country of Publication:
- United States
- Language:
- English
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