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Transport of copper, nickel and zinc ions across ultrafiltration membrane based on modified polysulfone and cellulose acetate
Author(s) -
Arthanareeswaran Gangasalam,
Thanikaivelan Palanisamy
Publication year - 2010
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.508
Subject(s) - polysulfone , membrane , cellulose acetate , ultrafiltration (renal) , metal ions in aqueous solution , polymer chemistry , chemistry , zinc , aqueous solution , copper , peg ratio , permeation , ether , polyethylene glycol , chelation , polymer , inorganic chemistry , nuclear chemistry , materials science , metal , organic chemistry , chromatography , biochemistry , finance , economics
In this work, an attempt has been made to separate divalent copper, nickel and zinc ions from aqueous solutions by modified polymeric membranes. Membranes from polysulfone (PSf) and cellulose acetate (CA) were prepared in the absence and presence of the hydrophilic polymer, sulfonated poly ether ether ketone (SPEEK) and additive, polyethyleneglycol (PEG 600), in various compositions. Studies were carried out to find the rejection and permeate flux of Cu(II), Ni(II) and Zn(II) ions using polyethyleneimine (PEI) as the chelating ligand. On increasing concentrations of SPEEK and PEG in PSf and CA casting solution, the rejection of metal ions is decreasing while the permeate flux has an increasing trend. These effects are due to the increased pore formation in the PSf and CA membranes because of the hydrophilic polymer and additive. In general, it was found that CA/SPEEK/PEG blend membranes displayed higher permeate flux and lower rejection compared to PSf/SPEEK/PEG blend membranes at all additive concentrations. It has also been demonstrated that the extent of removal of metal ions depend on the affinity of metal ions to PEI to form macromolecular complexes and the thermodynamic stability of the formed complexes. Copyright © 2010 Curtin University of Technology and John Wiley & Sons, Ltd.