Vm. Barragan et al., ON CURRENT DEPENDENCE OF THE ELECTROOSMOTIC PERMEABILITY IN ION-EXCHANGE MEMBRANES, Journal of membrane science, 95(1), 1994, pp. 1-10
The apparent electro-osmotic permeability, W, of three ion-exchange me
mbranes has been obtained under different experimental conditions. The
behaviour of W as a function of the current density, I, shows the fol
lowing characteristics: (i) at sufficiently low values of I, the appar
ent electro-osmotic permeability decreases when the current density in
creases; (ii) at an intermediate values of I, a local maximum appears;
and (iii) at the highest values of I, the apparent electro-osmotic pe
rmeability seems to approach a roughly constant value. The value of I
at which the local maximum takes place is very close to the so-called
limiting current density.