Abstract
Some properties of an anion-exchange membrane, ADS (Morgane-Solvay), were studied in aqueous solutions containing both sodium chloride and sodium benzenecarboxylate or benzenesulfonate. Measurements of electric resistance, water content, ion-exchange aqueself-diffusion flux were performed as a function of the organic salt concentration (10 −3 to 10 −1 M) in the external aqueous solution. The membrane affinity is greater for benzenesulfonate than benzenecarboxylate ion. The electric resistance decreases when the Cl − counter-ions are substituted by these organic ions more hydrophobic and less mobile. The self-diffusion flux of the Cl − ion through the membrane are strongly dependent on the water content and the concentration of this inorganic anion inside the membrane.
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