Abstract

Separation of bovine serum albumin (BSA) from poly(ethylene glycol) (PEG) through ultrafiltration membranes has been investigated. Concentration polarization by BSA represents a strong limitation to the transmission of PEG through a porous membrane. The application of an electric field normal to the membrane can help to reduce BSA concentration polarization and to enhance PEG transmission, both in ultrafiltration and in diafiltration mode. A range of solution compositions of BSA and PEG has been investigated. The contribution of electrokinetic phenomena is measured by specific experiments.

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