Abstract
When a membrane has an effective membrane charge, the membrane charge affects the ionic flux through the partition of ions into the membrane. In this paper, we treated the membrane system where the effective membrane charge was governed by the ions adsorbed selectively. We theoretically discussed the effect of the membrane charge, that is, the effect of the ions adsorbed selectively on the ionic flux using the selective ion adsorption model. As the results of the discussion, we showed that the effective membrane charge density depended on the bulk concentration and the concentration gradient of cation was different from that of anion within the membrane. Utilizing these characteristic properties, it was possible to facilitate the ionic permeation in the wide range of the bulk concentration, comparing with the neutral membrane. We also showed the ionic flux depended on the difference of the mobility between cation and anion more strongly than the neutral membrane and the membrane with a fixed membrane charge.
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