Modeling of solvent and ionic fluxes in electronanofiltration
- UMR, Montpellier (France). Lab. des Materiaux et Procedes Membranaires
Electronanofiltration (ENF) is a new membrane separation process that uses an additional electric field between the permeate and retentate sides during nanofiltration. A recently published pioneering work gives the performance with single and mixed ionic solutions containing one monovalent cation and one or two anions (mono-or/and divalent). It appears that the electric field leads to a net increase of cation flux and a decrease of anion permeation at the same time if the cathode is placed on the permeate side. In relation with the well-known dependence of solvent flux on transmembrane pressure, these data open up potential applications of ENF for new integrated operations of ion separation/concentration. In this paper a semiempirical model accounting for permeate and ionic fluxes is proposed. Based on the Sefan-Maxwell approach, a simple set of linearized equations is developed that fits experimental data at various transmembrane pressure ({Delta}P), electric fields ({Delta}U), and concentrations (C).
- OSTI ID:
- 682256
- Journal Information:
- Separation Science and Technology, Vol. 34, Issue 10; Other Information: PBD: Jul 1999
- Country of Publication:
- United States
- Language:
- English
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