Correlation between transport parameters of ion-exchange membranes

A deduction of a relation between transport coefficients of ion-exchange me mbranes is considered by comparison the Kedem-Katchalsky and Onsager forms of transport equations in the framework of irreversible thermodynamics. Thi s relation is analysed by using the experimental data of Narebska et al., B erezina ct al., and the results of other authors. Transport equations gener alising the Nemst-Planck equation with the coefficients determined directly from the practical transport characteristics are obtained either taking in to account or disregarding the above mentioned relation. The Nernst-Einstei n relation and its generalizations are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.