Abstract
Three types of reverse osmosis cellulose acetate (CA) membranes were prepared under the shrinking temperatures of 60°C (CA-I), 70°C (CA-II) and 90°C (CA-III) respectively. The rejections of nonionic surfactant Tween-80 were more than 95% in the CA membrane heat-shrunk at 60°C (CA-I) while other solutes showed less than 25% rejections in the same membrane. Also solute rejection increased and flux decreased substantially when Tween-80 was added to the feed solution.
