The Permselectivity of Membrane Systems with an Inhomogeneous Distribution of Fixed Charge Groups

摘要: The influence of the inhomogeneities in fixed charge distribution on transport properties (permselectivity and current-voltage characteristics) ion-exchange membranes is theoretically studied. A simple, approximate method for analytical solution Nernst-Planck equations with assumption local electroneutrality presented. Special attention paid to effect diffusion boundary layers permselectivity membrane system. Two distributions (linear exponential) are considered detail. It predicted that these could show higher permselectivities than a homogeneous same average concentration. Still, mainly determined by concentration thickness layers.