Abstract
This work describes the preparation of ceramic asymmetric nano-filtration membrane based on the application of synthesized nano hydroxyapatite (HA) as an active membrane layer. The support was prepared from commercial platy shape α- alumina. The processed discs showed a porous structure with relatively large pores of (7–10μm). HA membrane was produced by dipping process in a well-dispersed HA suspension fixed with 10% PVA to reach a membrane layer with thickness 20μm, then dried at 100°C and fired at 500°C/3h; these procedures were repeated three times. The characteristics of the obtained membrane were: membrane thickness of about 20μm; pore size ranging from 12 to18nm and porosity of 55%. The obtained membrane showed a permeation flux of 1101l/hm2 with salt retention coefficient 73%.
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