Abstract
In this paper the influences of pH and ionic strength on ceramic membrane microfiltration of TiO 2 dispersions were studied. A series of crossflow microfiltration experiments was carried out at various pH values, ionic strengths and with various multivalent inorganic salts. The filtration behaviour was analyzed based on measurements of zeta potential of alumina membrane and TiO 2 particles. Results showed that inorganic anions affect the microfiltration of TiO 2 dispersion by changing the surface properties of both the alumina membrane and TiO 2 particles. The particles environment affects the dispersion of TiO 2 particles and plays a major role in the filtration flux.
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