Removal of Cr(VI) from aqueous solution using functionalized poly(GMA-co-EGDMA)-graft-poly(allylamine)

To remove Cr(VI) from aqueous solution, a macroporous poly glycidyl methacrylate-co- ethylene glycol dimethacrylate (poly(GMA-co-EGDMA)) adsorbent was synthesized by radical suspension copolymerization. Allylamine was used to open the epoxy ring of the prepared copolymer, then the radical polymeriza...

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Bibliographic Details
Published in:Reactive & functional polymers 2019-01, Vol.134, p.133-140
Main Authors: Kim, Sujeong, Lee, Tai Gyu
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Allylamine
Aqueous solutions
Chemical synthesis
Copolymerization
Copolymers
Cr(VI) removal
Crosslinking
Epoxy resins
Ethylene glycol
Fourier transforms
Functional groups
Graft copolymers
Infrared spectroscopy
Isotherms
Mercury surface
Morphology
Organic chemistry
Poly(GMA-co-EGDMA)
Polymer adsorbent
Polymerization
Studies
Thiourea
Thioureas
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Summary:To remove Cr(VI) from aqueous solution, a macroporous poly glycidyl methacrylate-co- ethylene glycol dimethacrylate (poly(GMA-co-EGDMA)) adsorbent was synthesized by radical suspension copolymerization. Allylamine was used to open the epoxy ring of the prepared copolymer, then the radical polymerization of the grafted allylamine was performed, and as the last step, methyl isothiocyanate (MITC) was reacted with the crosslinked graft copolymers to introduce the thiourea groups. The introduced amine and thiourea functional groups enabled the effective removal of Cr(VI). The polymer was analyzed by FT-IR spectroscopy, FE-SEM, and mercury porosimetry, and the chemical structure, surface morphology and pore characteristics of the polymer were confirmed. The pH of the Cr(VI) solution strongly affected the performance of the adsorbent, and the best removal efficiency was obtained at pH 2. In the kinetic studies, the qe value determined from the pseudo-second-order model was similar to the experimental qe value, and this model showed the best correlation. The isotherm data were better fit by the Langmuir adsorption isotherm model than the Freundlich isotherm model, and the maximum adsorption capacity was 166.24 mg/g.
ISSN:1381-5148
1873-166X
DOI:10.1016/j.reactfunctpolym.2018.11.016