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Polymeric hydrogels obtained using a redox initiator: Application in Cu(II) ions removal from aqueous solutions
Author(s) -
MoránQuiroz José Luis,
OrozcoGuareño Eulogio,
Manríquez Ricardo,
CarbajalArízaga Gregorio G.,
de la Cruz Wencel,
GomezSalazar Sergio
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39933
Subject(s) - self healing hydrogels , aqueous solution , chemistry , polymer chemistry , ethylene glycol dimethacrylate , ammonium persulfate , polymerization , adsorption , radical polymerization , acrylic acid , potassium persulfate , langmuir adsorption model , nuclear chemistry , fourier transform infrared spectroscopy , ethylene glycol , chemical engineering , organic chemistry , polymer , monomer , methacrylic acid , engineering
Poly(acrylic acid‐ co ‐acrylamide) hydrogels were prepared via free‐radical solution polymerization, crosslinked with ethylene‐glycol‐dimethacrylate, potassium persulfate/ammonium bisulfite as the initiator, and applied in the removal of Cu(II) ions from aqueous solutions. Molar ratios of acrylamide/acrylic acid moieties and the amount of crosslinking agent were varied to determine the swelling capacities of hydrogels and maximum metal uptake. Polymerization kinetics was investigated by 1 H‐NMR. Hydrogel physicochemical properties were characterized by nitrogen sorption measurements, elemental analysis, FTIR, and X‐ray photoelectron spectroscopy (XPS). Swelling results indicated that hydrogels were swollen up to 27,500%. Hydrogels showed equilibrium Cu(II) adsorption capacities of 211.7 mg g −1 and fast kinetics (∼20 min). Langmuir isotherm fitted adsorption equilibrium data. FTIR and XPS results helped in elucidating the presence of monodentate copper complex on the surface of hydrogels. A simple synthesis route of hydrogels using the redox initiator suggests the potential application in the removal of toxic metals from aqueous streams. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39933.