Filtration of electrolyte solutions with new TiO2-ZnAl2O4 ultrafiltration membranes in relation with the electric surface properties

The low UF or NF membranes performances depend mainly on the nature of the interactions between the solutes and the material membrane especially for t he filtration of electrolyte solutions by means of charged ceramic membrane s. The results of filtration obtained for different electrolyte solutions w ith two kinds of membranes, a monolayer TiO2 (50%) ZnAl2O4 (50%) membrane a nd a bilayer TiO2-ZnAl2O4 membrane are in agreement with the variation of t he surface charge of the membrane which can be followed by either the strea ming potential across the membrane or the electrophoretic mobility of the p owder material. (C) 2001 Elsevier Science B.V. All rights reserved.