desalination of kashan city’s water using peba-based nanocomposite membranes via pervaporation

In this work, performance of composite membranes was investigated for desalination of kashan city’s water via pervaporation process. peba/pan/pe, peba/psf/pe and peba+nax/psf/pe composite membranes that used, was synthesized via a phase inversion route. for all experiments under 45◦c, salt rejection was too high and equals to 99.9% that this quantity dropped by increasing the temperature that cause membrane swelling in high temperatures. water contact angle and water take-up were measured to evaluate the hydrophilicity of the membrane. also the effect of operating conditions including feed temperature and permeate pressure on permeability and selectivity is discussed. a permeate flux of 4.93 kg/m2h with salt rejection of 99.9% could be achieved at a feed temperature of 50 °c and a vacuum of 0.04 bar. apparent diffusion coefficients of water at various permeate pressure and feed temperature are calculated. the most effective parameter was feed temperature.