Comparation of Interrelation between Casting Solution and Performances for Reverse Osmosis Membranes (400-1, 400-2, 400-3)

摘要

The aim of this work was further improvement of performance of cellulose acetate –coal heterogeneous reverse osmosis. Three batches of heterogeneous reverse osmosis membranes (cellulose acetate – coal membranes have been investigated in this study. The concept of changes on the structure of casting solution during film formation justificate practical interest of this study. All types of membranes were tested with referent system NaCl-H2O solution of feed concentration 6.86x10 -3 mol /dm3 and feed flow rate -4 corresponding to a mass transfer coefficient of 45x10 cm/sec. The differences in the performances were attributed to the relation with casting solution and the effects of the volatility and evaporation rates of solvents. The performance data obtained with heterogeneous asymmetric membranes suggest that this membranes seen promising for treatment of waste waters.