Abstract
Polysulfone (PSf) membrane incorporated with crystalline silica (SiO2) was fabricated via phase inversion method. This study investigates the effect of SiO2 and PVP as additive for different dope formulation of PSf membrane. SiO2 is an abundant compound around the earth that is naturally occurring such as clay and graphite. They are widely used in industries to produce silica gel, colloidal silica, and fumed silica. In this study, experimental investigation was conducted focusing on different casting rate. Casting rate was varied from 7.3 to 10 ms−1. Performances of PSf membrane were measured in term of pure water flux (PWF) by using distilled water and salt rejection (SR). The results indicate that the best dope formulation was at membranes containing 3 % of silica where successfully do rejection of 69.84 % and optimum flux rate of 39.45 Lm−2 h−1. The result also shows that casting rate influences the final performance of membrane. The increase of casting rate would give good results in water flux and salt rejection. As a conclusion, 8.00 ms−1 was an ideal casting rate with the values of 77 % rejection and 39.24 Lm−2 h−1 permeation.
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