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Functionalization in copolymers based on 4VP:DVB for the removal of Cr(VI) ions from aqueous solution
Author(s) -
OrtizPalacios Jesús,
Cardoso Judith,
de la Cruz Marcos,
Anleu Eloisa
Publication year - 2017
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.45548
Subject(s) - adsorption , divinylbenzene , copolymer , freundlich equation , suspension polymerization , aqueous solution , ion exchange , ion exchange resin , polymer chemistry , langmuir adsorption model , monomer , chemistry , langmuir , fourier transform infrared spectroscopy , surface modification , nuclear chemistry , materials science , ion , chemical engineering , organic chemistry , styrene , polymer , engineering
Adsorption capacity for Cr(VI) ions has been evaluated on two ion‐exchange resins. A gel‐type precursor resin was obtained by suspension polymerization of 4‐vinylpyridine and divinylbenzene monomers with 40% crosslinking degree. It was quaternized with different functional groups to give two ion‐exchange resins. The R2 resin contained sulfobetaine groups, and R3 methyl groups. The resins were characterized by Fourier transform infrared and solid‐state 13 C CP/MAS NMR spectroscopy and by elemental analysis. An adsorption experiment was carried out by a batch equilibrium procedure. Langmuir and Freundlich isotherm models were used to determine the adsorption capacity. R2 and R3 resins exhibited maximum adsorption capacity q max = 75.8 and 56.2 mg/g, respectively. The resins achieve equilibrium in 60 min. The R3 and R2 resins showed a retention capacity of 95% and 80% for the Cr(VI) ions, respectively. The behaviors of both resins were explained well by a pseudo‐second‐order kinetics model. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45548.