Transport phenomena of some surfactants were investigated with Loeb-type skinned membranes annealed at 60, 70, 75, and 80°C, with the following results. (1) The rejection of cationic and anionic surfactants is larger than that of nonionic surfactants, especially at concentrations below CMC. (2) In the case of nonionic surfactants, their fluxes decrease with the increase of molecular weight. (3) The effect of CMC on the transport of surfactants is great, particulary in the case of nonionic surfactants. (4) Concentration polarization on the surface of the membrane can be predicted by taking into account the difference between surfactant fluxes below and above CMC.
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Kamizawa et al. (1972) studied this question.
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