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Customized antifouling polyacrylonitrile ultrafiltration membranes for effective removal of organic contaminants from aqueous stream
Author(s) -
Beril Melbiah Jegan Stella,
Joseph Pramila,
Rana Dipak,
Nagendran Alagumalai,
Nagendra Gandhi Nagarajan,
Mohan Doraiswamy Raju
Publication year - 2019
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5833
Subject(s) - membrane , polyacrylonitrile , ultrafiltration (renal) , chemical engineering , phase inversion , fouling , biofouling , attenuated total reflection , humic acid , materials science , chromatography , adsorption , chemistry , diafiltration , fourier transform infrared spectroscopy , microfiltration , polymer , organic chemistry , biochemistry , fertilizer , engineering
BACKGROUND Ultrafiltration (UF) is a promising separation technique for the removal of macromolecular contaminants. However, the hydrophobic polymeric UF membrane performance suffers from fouling in the long run due to clogging by contaminants at the surface and pores. In this study, anti‐fouling hydrophilic polyacrylonitrile (PAN) UF membranes in the presence of an amphiphilic triblockcopolymer, Pluronic F127 (PF127) were prepared via a phase inversion technique. RESULTS The effect of varying concentrations of PF127 on PAN UF membranes was analyzed by attenuated total reflectance–Fourier transform infrared spectroscopy (ATR‐FTIR), by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The filtration characteristics of the membranes were measured in terms of pure water flux, membrane porosity and water content. The separation efficiency of the membranes is explored for contaminants such as bovine serum albumin (BSA), humic acid (HA) and oil. The results revealed that the PAN membrane with 4 wt% of PF127 produced greatest permeate flux of 391 L m −2 h −1 with minimal fouling. A higher solute rejection of more than 90% was observed for the tailored membranes due to the improvement in surface properties. CONCLUSION The inherent hydrophilicity of the high density poly (ethylene oxide) brush‐like layer of PF127 at the membrane–water interface is utilized effectively to restrict the adsorption of the organic contaminants onto the membrane surface. After simple hydraulic washing of PAN/PF127 UF membranes, the flux recovery ratio was augmented which is ascribed to their excellent antifouling property and potential use in water treatment. © 2018 Society of Chemical Industry