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Abstract
PES-based nanofiltration membranes were prepared by phase inversion method. Fe3O4 nanoparticles with a constant concentration and sodium citrate in different concentration were incorporated into the PES. The membranes were characterized by Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), EDX dot mapping and Atomic force microscope (AFM) analysis. Physico-chemical, antifouling properties, and separation performance of the fabricated membranes were investigated by the contact angle, pure water flux (PWF), Na2SO4 rejection and flux recovery ratio (FRR%). The membrane porosity and mean pore size enhanced for the modified membranes compared the bare membrane. The PWF sharply improved from 16 L/m2h in the bare membrane to 47 L/m2h at 0.5 wt% Fe3O4 and 0.3 wt% sodium citrate (M5). The highest salt rejection obtained was 68%, while it was 61% for the bare membrane. Better dispersion of Fe3O4 nanoparticles into the casting solution with outstanding antifouling properties was observed.
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