Nanofiltration theory: Good co-ion exclusion approximation for single salts

Article Abstract:

An approximate analytic method, the good co-ion exclusion (GCE) approximation, was applied to the hindered electrotransport theory in order to explain salt and solution transport across charged nanofiltration membranes. The results for the volume flux density, obtained within an extended GCE approximation, confirm that the global osmotic reflection coefficient in the solution flux equation is not equal to the limiting salt rejection.

Electron transport, Electrolytes

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Dielectric characterization of a nanofiltration membrane in electrolyte solutions: Its double-layer structure and ion permeation

Article Abstract:

Dielectric spectroscopy (DS) was used to detect double-layer structure and ion permeation of a nanofiltration (NF) membrane. It was revealed that DS was by far an effective method to obtain detailed electric parameters about the inner multilayer structure of the NF membrane and to elucidate separation mechanisms of each layer.

Electrolyte solutions, Dielectrics, Dielectric materials

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