5 years ago

Functionalization in copolymers based on 4VP:DVB for the removal of Cr(VI) ions from aqueous solution

Functionalization in copolymers based on 4VP:DVB for the removal of Cr(VI) ions from aqueous solution
Eloisa Anleu, Judith Cardoso, Jesús Ortiz-Palacios, Marcos de la Cruz
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 13C 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 qmax = 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.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/app.45548

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