Premium
Removal of cobalt ions from aqueous solutions by using poly( N , N ‐dimethylaminopropyl methacrylamide/itaconic acid) hydrogels
Author(s) -
Baş Nalan,
Yakar Arzu,
Bayramgil Nursel Pekel
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.39569
Subject(s) - itaconic acid , self healing hydrogels , aqueous solution , methacrylamide , copolymer , ethylenediaminetetraacetic acid , materials science , polymer chemistry , nuclear chemistry , adsorption , fourier transform infrared spectroscopy , cobalt , acrylic acid , polymerization , swelling , comonomer , metal ions in aqueous solution , chemistry , chemical engineering , inorganic chemistry , metal , polymer , organic chemistry , acrylamide , composite material , chelation , engineering , metallurgy
In this study, N,N‐dimethylaminopropyl methacrylamide (DMAPMAm) homopolymer and DMAPMAm/itaconic acid (DMAPMAm/IA) copolymers were obtained from 60 Co‐γ radiation polymerization. Gel fraction and percentage of swelling values were calculated through gravimetrical calculations. In order to increase the swelling of the hydrogel, the amount of IA in initial copolymer composition was gradually increased, but it was observed that gelation values were low. The structural and morphological assessments of homopolymer and copolymers were made by means of several techniques including Fourier Transform Infrared Spectroscopy (FT‐IR), Scanning Electron Microscopy (SEM), and Energy‐Dispersive X‐ray Spectroscopy (EDS). The cobalt ion (Co 2+ ) removal capacities of hydrogel were investigated by taking into account of the initial metal ion concentration and pH of aqueous medium. When it came to the maximum capacity of values obtained from adsorption experiments by using Co 2+ solutions at pH 5, they changed between 220 and 245 mg Co 2+ /g dry hydrogel. FT‐IR, SEM, EDS, and XRD analyses were carried out for enlightening the mechanism of Co 2+ removal by hydrogels after the completion of adsorption. Also, desorption studies were conducted using ethylenediaminetetraacetic acid (EDTA). Finally, within approximately 5 days, all adsorbed Co 2+ ions were released from hydrogels at pH 5 using 0.1 M EDTA solution. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39569.