Faculty Publications
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Item Removal of toxic arsenic from aqueous media using polyphenylsulfone/cellulose acetate hollow fiber membranes containing zirconium oxide(Elsevier B.V., 2020) Kumar, M.; Isloor, A.M.; Somasekhara Rao, T.; A.F., A.F.; Farnood, R.; Nambissan, P.M.G.Arsenic is one of the highly dangerous metalloid present in the polluted water, it's effective and economical removal is one of the major challenges to the researchers. It was planned to prepare hollow fiber membranes using polyphenylsulfone (PPSU) as a polymer, cellulose acetate (CA) and cellulose acetate phthalate (CAP) as additives with increased dosages (0.6, 1 and 1.5 wt%) of zirconium oxide (ZrO2) nanoparticle. The fabricated hollow fiber membranes were characterized by SEM, AFM, zeta potential, ATR-FTIR and XPS to analyze the membrane's morphologies (cross-section and surface), topography, surface charge and assessment of different functional groups. As used ZrO2 was characterized by TEM and XRD to analyze the morphology and crystallinity. The positron annihilation lifetime spectroscopy (PALS) analysis was carried out for neat and ZrO2 contained membranes, to study the expansion of free-volume in membrane morphology. Leaching studies of the used zirconium with respect to different pH from the ZrO2 contained hollow fiber membrane was also examined. The enhancement of membrane hydrophilicity was confirmed by contact angle, porosity, water uptake and pure water permeability measurements. Membranes prepared by 1 wt% of ZrO2 in PPSU/CA (PZCA-1) and 0.6 wt% of ZrO2 in PPSU/CAP (PZCAP-0.6) were proved to be efficient as arsenic removal membranes (i.e. PZCA-1 as 87.24% and PZCAP-0.6 as 70.48% and permeability of 89.94 L/m2h bar and 70.59 L/m2h bar respectively) using lab-prepared 1 ppm standard arsenic solution at pH range of 6.8 ± 0.2. Also, there is a decrease in the arsenic removal tendency was observed with the excessive dosages of ZrO2, which is due to the concentration polarization on surfaces of the membranes. Antifouling behavior of the prepared hollow fiber membranes was also studied using bovine serum albumin (BSA). © 2020Item Tuning the surface properties of Fe3O4 by zwitterionic sulfobetaine: application to antifouling and dye removal membrane(Springer, 2020) Gnani Peer Mohamed, G.P.; Isloor, A.M.; Siddique, I.; Asiri, A.M.; Farnood, R.In this paper, zwitterionic polysulfobetaine@Fe3O4 (PSBMA@Fe3O4) nanoparticles were synthesized via covalent grafting and free radical polymerization and characterized. The PSBMA@Fe3O4 noparticles had a zeta potential of ? 36 mV (pH 6.3), which guaranteed the high colloidal stability. The as-synthesized nanoparticles were employed as a nanofiller to prepare superior antifouling polysulfone hybrid hollow fiber membranes. The FM-2 membrane exhibited the maximum pure water permeability of 61.1 L/m2 h bar with humic acid (HA) removal efficiency of 98%. The fouling resistance was evaluated using HA as a foulant, and the results suggested that the FM-2 membrane had less amount of HA adsorption with flux recovery ratio of 88.4%. Furthermore, the FM-2 membrane was demonstrated the reactive black-5 and reactive orange-16 removal of above 99% and 84% without much reduction in the dye solution permeability. © 2020, Islamic Azad University (IAU).Item High performance 2D molybdenum MXene polyphenylsulfone membranes for boosting water flux and efficient removal of humic acid, antibiotic and dyes from wastewater(Elsevier B.V., 2025) Satishkumar, P.; Isloor, A.M.; Farnood, R.MXene, a leading two-dimensional material, is attracting scientists due to its rich polar surface termination and compatibility. Through the etching of an aluminum layer from Mo3AlC2, we have effectively produced molybdenum MXene Mo3C2Tx (where T stands for polar moieties like –OH and ?F) and used it to fabricate a new Mo3C2Tx embedded mixed matrix membrane. By the incorporation of highly hydrophilic Mo3C2Tx MXene into polyphenylsulfone (PPSU) membrane, its water flux tremendously increased to a peak value of 290 L m-2h?1 and is higher than 300 % compared to pristine polyphenylsulfone membrane without Mo3C2Tx MXene. Water contact angle study of Mo3C2Tx MXene embedded membranes showed improvement in hydrophilicity with an increase in its loading. Mo3C2Tx-PPSU membrane demonstrated appreciable antifouling nature and pollutant separation efficacy. The optimal membrane revealed 98.68 %, 96.7 %, 84.72 %, and 80.2 % removal of toxic contaminants like humic acid, RB 5 dye, RO 16 dye, and tetracycline antibiotic, respectively. This study offers a novel Mo3C2Tx embedded polyphenylsulfone membrane for wastewater treatment that eliminates potentially harmful humic acid, antibiotics, and dyes. © 2025