Modification of active and porous sublayers of aged polyamide/polysulfone composite membranes due to HNO3 treatment: effect of treatment time.

Abstract

Changes in electrical and transport parameters for aged composite polyamide/polysulfone membrane samples (PAC) and their porous support layers (PSU) as a result of chemical treatment (immersion in 1 M HNO3 solution) at four different times (12 h < or = t < or = 72 h) have been obtained. Salt permeability, ion transport number, and membrane electrical… (More)

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