Abstract
The pressure-driven membrane separation of dilute single-solute aqueous solutions of glucose, ascorbic acid, citric acid, and mannitol was studied at low pressure using an asymmetric cellulose acetate membrane in a batch stirred cell. Results were analyzed based on a mass transfer analysis which included both convective and diffusive effects. Rejection followed the trend glucose mannitol⪢ascorbic acid⪢citric acid. Transport parameters followed the trend glucose≈mannitol<ascorbic acid<citric acid. The observed results are explained on the basis of significant physicochemical interactions between solute, solvent, and membrane.
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