Enhancement of sorption kinetics by an oscillatory electric field

Raudino, Antonio; Larter, Raima
February 1993
Journal of Chemical Physics;2/15/1993, Vol. 98 Issue 4, p3422
Academic Journal
We have developed a theoretical model to investigate the effect of an oscillatory electric field on the sorption kinetics of a charged reactant onto a reactive colloid particle. The model assumes a diffusion-controlled kinetics under the effect of a local electric field induced at the electrolyte solution–colloid particle interface. The analytical results predict a quadratic relationship between the sorption rate and the applied field intensity and a complex dependence of the kinetics on the field frequency which, in concentrated electrolyte solutions, may show a maximum at certain critical frequencies. In physical terms, these results mean that the oscillating field enhances the sorption rate, making the reaction faster than it is in the absence of a time-dependent field.


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