A new approach to tailoring the separation characteristics of polyethersulfone nanofiltration membranes by 8-hydroxyquin
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pISSN: 0256-1115 eISSN: 1975-7220
INVITED REVIEW PAPER
INVITED REVIEW PAPER
A new approach to tailoring the separation characteristics of polyethersulfone nanofiltration membranes by 8-hydroxyquinoline functionalized Fe3O4 nanoparticles Saeed Ansari, Abdolreza Moghadassi†, and Sayed Mohsen Hosseini† Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran (Received 14 February 2020 • Revised 5 June 2020 • Accepted 30 June 2020) Abstract8-Hydroxyquinoline (8-HQ) was used for modification of Fe3O4 nanoparticles (NPs) and preparation of polyethersulfone (PES)-based mixed matrix membranes (MMMs) by phase inversion process. The synthesized nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), Energy dispersive x-ray spectroscopy (EDX), and Field emission scanning electron microscopy (FESEM). The effect of different concentrations of 8HQ/Fe3O4 NPs into the PES as membrane matrix was investigated by FESEM and atomic force microscopy (AFM). The performance of prepared membranes was evaluated by the water contact angle, pure water flux (PWF), porosity, means pore size, and salt rejection. Bovine serum albumin (BSA) solution was used to investigate the antifouling properties of fabricated membranes. The results showed a decreasing water contact angle from 68.1o for the pristine membrane to 38.3o for M5 at 0.5 wt% 8-HQ/Fe3O4 NPs. The PWF enhanced for all mixed matrix membranes compared with the pristine membrane. The highest PWF (21.5 L/m2h) was measured for M4 at 0.2 wt% NPs, Wwhile it was 7.1 L/m2h for pristine membrane. Salt rejection improved from 58.55% in M1 (pristine membrane) to 96% in M4 (at 0.2 wt% of 8-HQ/Fe3O4 NPs). Also, the modified membranes showed suitable antifouling property. Keywords: Nanofiltration Membrane, Fe3O4 Nanoparticles, 8-Hydroxyquinoline, Functionalized NPs, Improved Separation Characteristics
as polyvinylpyrrolidone (PVP) [12], metformin, amine groups [1517], and carboxymethyl chitosan [18] in the combination with magnetic NPs show the high affinity between membrane and nanoparticles. Coating, immobilization of reactive ligands, and the modification of nanoparticles with polymeric materials and inorganic nanomaterials are various methods for overcoming these challenges [19-23]. Hosseini et al. [12] fabricated hybrid PES/polyvinylpyrrolidone (PVP)-Fe3O4 NF membranes. These membranes increased pure water flux from 3.14 (L/m2·h) for the pristine membrane to 9.96 (L/m2·h) in 0.1 wt% of PVP-Fe3O4 NPs. The salt rejection obtained was about 77%-90%. The flux and anti-fouling properties were enhanced compared with the pristine membranes. The flux recover ratio (FRR%) of fabricated membranes was about 69.9% to ~89.5%, while pristine membranes showed FRR% ~46.2%. Zinadini et al. [18] used the carboxymethyl chitosan for the modification of Fe3O4 NPs. Modified nanoparticles revealed a high flux recovery ratio of about 91.7% at 0.5 wt% NPs. Functionalization of Fe3O4 NPs by immobilizing silica, metformin, and amine increased the p
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