separation efficiency of epoxified-polyethersulfone blend membrane for chromium removal

Authors

m.j.j. erniza

school of chemical engineering, engineering campus, universiti sains malaysia, seri ampangan, 14300 nibong tebal, pulau pinang, malaysia a.l. ahmad

school of chemical engineering, engineering campus, universiti sains malaysia, seri ampangan, 14300 nibong tebal, pulau pinang, malaysia s.c. low

school of chemical engineering, engineering campus, universiti sains malaysia, seri ampangan, 14300 nibong tebal, pulau pinang, malaysia

abstract

a microporous bisphenol a diglycidyl ether (dgeba) epoxified-polyethersulfone (pes) blend membrane (epes membrane) was prepared through dry-wet phase inversion. this study attempts to correlate the changes in membrane physical and chemical properties when the epes membranes were exposed to different durations of dry-phase inversion, towards the separation efficiency of carcinogen chromium (vi). field emission scanning electron microscopy (fesem) and porometer analysis revealed a small but not significant change of the physical structures of the epes membranes at different durations of dry-phase inversion that are applied. on the other hand, in terms of chemical properties, both fourier transform infrared spectroscopy and contact angle measurement demonstrated enhanced membrane hydrophilicity when a longer period of dry phase inversion was imposed during membrane synthesis. the epes membrane synthesized through 1 h of dry phase inversion showed the most balanced high rejection and permeation performances at 88.84 ± 0.18 % removal of cr (vi) ions with minimum membrane fouling at a steady permeation flux of 11.27 ± 0.35 l/m2h. from the result, epes blend membranes revealed good potential in the removal of carcinogen cr (vi) without jeopardizing the membrane permeation flux.

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Journal title:
journal of membrane science and research

جلد ۲، شماره ۲، صفحات ۱۰۲-۱۰۸

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