Effects of Physicochemical Conditions on Ceramic Cross-Flow Microfiltration of Mineral Dispersions
The IUP Journal of Chemical Engineering, Vol. I, No. 2, pp. 47-55, December 2009
Posted: 23 Dec 2009
Date Written: December 23, 2009
Abstract
In this paper the influence of dispersion pH, ionic strength, and coagulant type on ceramic membrane microfiltration of TiO2 dispersions were studied. A series of cross-flow microfiltration experiments were carried out at various pH values, ionic strengths and with various multivalent inorganic salts. Filtration behaviors were analyzed based on measurements of zeta potential of alumina membrane and TiO2 particle and particle size distribution of the TiO2 suspension. The results showed that inorganic anions affect the microfiltration of TiO2 dispersion by changing the surface properties of both the alumina membrane and TiO2 particle. The solution environment affects the dispersion of TiO2 particles and plays a major role in the filtration flux.
Keywords: Microfiltration, pH, Ionic strength, Coagulation, Membrane fouling
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