Ionic transport through a homogeneous membrane in the presence of simultaneous diffusion, conduction and convection

Abstract

The problem of ionic transport through a homogeneous membrane when diffusion, conduction and convection are involved simultaneously has been considered. We have discussed the effect that the convective flow exerts on the whole flow and on the so-called ‘lag time’. Thus, expressions have been derived showing to what extent convection increases the matter flow and reduces the time required for ions to cross the membrane. The assumption of infinite collecting volume has been analysed and conditions making it applicable have been given. The case of a charged membrane is also discussed.