Abstract
A mathematical model adequately describing extraction separation of chemically similar elements under nonequilibrium conditions was developed. Both single-extractor systems and systems of two extractors connected via an organic phase (continuous liquid membrane) were studied. The closed and flow modes of oscillatory extraction were considered. A general study of the properties of the model was performed. The model is capable to reproduce the majority of oscillatory modes described in the literature for chemical oscillators based on the Belousov-Zhabotinskii reaction. The correlations between the characteristic features of the oscillations and some parameters of the system were determined. Regular trends in the effect of the rate constants of the Field-Koros-Noyes mechanism simplified in accordance with the irrevesrsible Oregonator scheme and of the intensity of Ce(IV) interphase exchange on the behavior of the system were revealed. Algorithms were suggested for efficient simulation of some common experimental oscillatory modes.
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