抄録
Fouling of ion exchange membranes is one of the most important considerations in the design and operation of electrodialysis processes. Since fouling potential is closely related to the electrochemical properties of the foulants and ion exchange membranes, it is necessary to characterize their properties using various methods in order to predict fouling potentials on the electrodialysis performances. In this study, the current-voltage relationship, the chronopotentiometry and the impedance spectroscopy were considered for the characterization of electrochemical properties of an anion exchange membrane (AMX) in the presence of bovine serum albumin (BSA). The current-voltage relationship and the chronopotentiometry represented the electrochemical property of the membranes relating to ion transport and the concentration polarization occurring on the surface of the anion exchange membrane. The resistance and capacitance of the virgin and fouled AMX membranes could be estimated using an impedance spectroscopy. The fouling potential characterized with the electrochemical methods was confirmed by the results of electrodialysis experiments. It was clearly shown that the electrochemical methods could be used to analyze the fouling potentials of anion exchange membranes in the electrodialysis process.
