Polarization effects at the cation-exchange membrane - Solution interface

Abstract

An experimental study of the concentration polarization effects at the cation-exchange membrane - solution interface has been carried out by means of a rotating diffusion cell. The set-up makes possible well-defined fluid mechanics. The effects are discussed mainly in terms of the current-voltage curves obtained. Possible transport mechanisms for over-limiting currents are also reviewed. The study of concentration polarization involves many basic concepts of transport theory, and has a number of technological implications.