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Title: Effect of solvents on performance of polyethersulfone ultrafiltration membranes: investigation of metal ion separations
Authors: Arthanareeswaran, G.
Starov, Victor
Keywords: Polyethersulfone
Liquid-phase polymer-based retention
Removal of metal ions
Issue Date: 2010
Publisher: © Elsevier
Citation: ARTHANAREESWARAN, G. and STAROV, V., 2010. Effect of solvents on performance of polyethersulfone ultrafiltration membranes: investigation of metal ion separations. Desalination, 267 (1), pp. 57-63.
Abstract: The new polyethersulfone (PES) based ultrafiltration membranes were formed using a two stage process of dry and wet phase inversion in non solvent coagulation bath. The effects of three different solvents such as, N, N-dimethylformamide (DMF), N-methyl-2-pyrrolidone (NMP) and Dimethyl sulphoxide (DMSO) of 82.5% and 85% concentrations on the performance of final membranes were extensively investigated. Scanning electron microscopy (SEM) image results proved that PES membranes with an asymmetric structure were successfully formed. The number of pores formed on the top layer of PES membranes using above-mentioned three solvents was the result of the combined effect of the thermodynamic properties of the system (composition, concentrations, and phase behaviour) and membrane formation kinetics, whereas, the formation of the macroporous sub layer of those membranes was controlled by the diffusion rate of solvent– nonsolvent. The flux of pure water, membrane resistance, mechanical stability, molecular weight cut-off (MWCO) and separation performance of the PES membranes were studied. Separation of metal ions from aqueous solutions was studied for Ni(II), Cu(II) and Cr(III) using two complexing polymer ligands: polyvinyl alcohol (PVA) and poly(diallyldimethylammonium chloride) (PDDA).The separation and permeate rate (flux) efficiencies of the new membranes are compared using different solvents and different PES/solvent compositions.
Version: Accepted for publication
DOI: 10.1016/j.desal.2010.09.006
URI: https://dspace.lboro.ac.uk/2134/7802
Publisher Link: http://dx.doi.org/10.1016/j.desal.2010.09.006
ISSN: 0011-9164
Appears in Collections:Published Articles (Chemical Engineering)

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