Figure 3
(a) Flow performance as a function of transmembrane pressure (ΔP, MPa) of pure PA and MWCNT·PA nanocomposite reverse osmosis membranes before and after exposure to chlorine water (200 ppm). (b) Salinity rejection rates before and after chlorine water exposure of the pure PA, the MWCNT·PA nanocomposite membrane and the commercial PA RO membrane tested with 3.5 wt. % salt water. (c) Comparison of permeate flux/rejection performance of the PA, MWCNT·PA and commercial RO membrane at different sodium chloride concentrations. (d) Fouling of the MWCNT·PA nanocomposite membrane and a commercial PA RO membrane in presence of 200 ppm BSA concentration in DI water. Data from Ref. 7 obtained with a considerable lower (3 ppm) BSA concentration is shown for comparison. (e) Comparison of the permeate flux/rejection performance of our membrane (solid fill symbols) with previous works.
