Ion-exchange membranes (IEMs) have received considerable attentions due to their wide application in cleaning production and environmental protection. In this background, modeling the ion-exchange membrane processes and correlating the parameters become necessary and important. This paper reported a simple procedure to simultaneously evaluate the transport and structural parameters on the basis of conductivity measurements together with the data of the conventional ion-exchange capacity and water uptake. Most of the commercial membranes and a series of lab-made membranes were used for the modeling, and the characteristic parameters for the ion-exchange membrane microstructure were correlated. (c) 2007 Elsevier B.V. All rights reserved.