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Three surface modification macromolecules (SMMs) with different chemical structures(DEG, DPS and SMM41) were used in the preparation of new polyethersulfone (PES)ultrafiltration membranes, in an attempt to improve their performance in water treatment.During the first stage of this study, the use of SMM41 to modify the surface of PESmembranes maximized the permeate flux throughout the experiment, achieved high totalorganic carbon (TOC) removals and low natural organic matter (NOM) deposition. Whenpolyvinylpyrrolidone (PVP), a pore forming additive, was also used in the casting solution,its effect was not statistically significant in the range studied. Surface modified membranesperformed statistically the same as the unmodified membranes. However, the nature of thefeed concentrated Ottawa River water (CORW) had an important impact on theperformance of these new membranes. The low molecular weight fraction (LMW) of theriver water caused less fouling of the membranes, had higher water productivity (permeateflux), although TOC removal was lower. Nevertheless, in general, TOC removals werehigh, compared with those of ultrafiltration (UF) membranes reported in the literature. Includes 17 references, tables, figures.

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Edition: Vol. - No. Published: 06/15/2003 Number of Pages: 12File Size: 1 file , 1.2 MB