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This article reports the chromium (VI) removal from water by preparing polyacrylonitrile-co-poly (2-ethyl hexylacrylate) (PAN(92)-co-P2EHA(8)) and polyaniline (PANI) nanoporous membranes at various PANI loadings. It was observed that chromium (VI) rejections of nanoporous membranes are highly concentration and pH dependent. Almost complete chromium removal (99.9%) with higher flux values (120-177 L m-2 h-1) was observed for nanoporous membranes. Moreover, nanoporous membranes were also demonstrated as fouling resistant. Total flux loss was low and a part was attributed to reversible flux loss, which cannot cause any permanent hysteresis and easily overcome with simple washing. Scanning electron microscopy (SEM) studies were performed for identifying cross sectional morphology. It was pointed out that pore size should be small enough for filtration and optimized for higher flux but pores should be functionalized for rejection. Chemical structure, swelling ratios, sheet resistivity, and fracture morphologies of nanoporous membranes were reported. POLYM. ENG. SCI., 2012. (C) 2012 Society of Plastics Engineers, Scientific and Technological Research Council of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [108T099], Contract grant sponsor: The Scientific and Technological Research Council of Turkey; contract grant number: 108T099.

In this work, novel polyacrylonitrile(88)copolymethylacrylate(12) and polyaniline(PANI) nanocomposites were prepared at various PANI loadings to remove chromium(VI) solution from water. The chemical structure, swelling and fracture morphology of the nanocomposite membranes were also studied. It was observed that PANI had a great impact on the chromium removal. Permeate flux and rejection of chromium (VI) was demonstrated for various pHs and chromium(VI) concentrations. The effect of solution pH on chromium(VI) removal was very significant. 99.5% chromium(VI) removal was observed at acidic pHs with high fluxes of approximately 1500 L/m(2) h at 689.5 kPa. Also, it was demonstrated that nanocomposite membranes were fouling resistant. (c) 2009 Elsevier B.V. All rights reserved., The Scientific and Technological Research Council of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [108T099], Authors would like to thank The Scientific and Technological Research Council of Turkey for the financial support under the contract #108T099.

In this work, novel polyacrylonitrile(88)copolymethylacrylate(12) and polyaniline(PANI) nanocomposites were prepared at various PANI loadings to remove chromium(VI) solution from water. The chemical structure, swelling and fracture morphology of the nanocomposite membranes were also studied. It was observed that PANI had a great impact on the chromium removal. Permeate flux and rejection of chromium (VI) was demonstrated for various pHs and chromium(VI) concentrations. The effect of solution pH on chromium(VI) removal was very significant. 99.5% chromium(VI) removal was observed at acidic pHs with high fluxes of approximately 1500 L/m(2) h at 689.5 kPa. Also, it was demonstrated that nanocomposite membranes were fouling resistant. (c) 2009 Elsevier B.V. All rights reserved., The Scientific and Technological Research Council of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [108T099], Authors would like to thank The Scientific and Technological Research Council of Turkey for the financial support under the contract #108T099.