The article under discussion deals with the classical topic of electrolyte diffusion in porous media. Special attention is given to the concentration dependence of the effective diffusion coefficient. The findings of the article are, in many ways, rather unusual. First, a concentration dependence far exceeding that reported in the literature is found, and second, the apparent tortuosities are, in most cases, of such a magnitude that their physical meaning must be seriously questioned.
Journal of Porous Media Vol. 12, Issue 3, p. 289-291