In the separation process of liquid surfactant membrane

one of the important reasons causing permeation swelling is that the carrier reacts with the solute at the interface of emulsion and then solubi lization of water in membrane phase is caused not only by surfactant but also by carrier-solute complex.Furthermore，water diffusion through the membrane goes on due to both the chemical potential of electrolytes and the chenmical potential between reactants and reaction products .A mathematical model for estimating the permeation swelling rate during extraction is proposed.The prediction results are in good agreement with the experimental data.