Vm. Barragan et C. Ruizbauza, CURRENT-VOLTAGE CURVES FOR ION-EXCHANGE MEMBRANES - A METHOD FOR DETERMINING THE LIMITING CURRENT-DENSITY, Journal of colloid and interface science (Print), 205(2), 1998, pp. 365-373
The curves (V, I) of different ion-exchange membranes have been determ
ined under different experimental conditions. Taking into account the
classical theory of concentration polarization, a method has been deve
loped to adjust the (V, I) data, up to a certain value of I, which per
mits us to obtain easily the value of the limiting current density, I-
L, in every experimental situation. From these values, the dependence
of the limiting current density of the membranes used on the concentra
tion and stirring rate of the solutions has been studied. To check the
reliability of the method, the values of I-L thus obtained have been
compared with those obtained by the usual methods; the similitude betw
een both values is high. (C) 1998 Academic Press.