Journal
CHEMICAL ENGINEERING JOURNAL
Volume 289, Issue -, Pages 286-295Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2015.12.073
Keywords
Chelating; Magnetic copolymer; Click reaction; Adsorption; Fe3O4 nanoparticles; Metal removal
Categories
Funding
- Burapha University through National Research Council of Thailand [71/2557]
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Office of the Higher Education Commission, Ministry of Education
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Novel chelating magnetic copolymer beads in micron-size range were prepared by suspension polymerization and click reaction. The click chemistry was proposed as a tool for tuning the surface functionality of magnetic poly(vinylbenzyl chloride-co-styrene-co-divinyl benzene), M-PVBC, by a covalent attachment with propargyl alcohol via triazole formation. After click-coupling reaction, the changes in surface morphology and chemical functionality were examined by SEM-EDX and FT-IR, respectively. Adsorption characteristics for heavy metal were investigated by a batch adsorption in an aqueous system under different experimental conditions. The adsorption process was pH, concentration and time dependent. The maximum adsorption capacities of the chelating magnetic copolymer, M10-PVBC-C, for Zn(II), Cu(II) and Ni(II) in 500 ppm solutions were 67.29, 61.20 and 57.18 mg/g, respectively. Adsorption of Cu(II) ion, the model heavy metal ion, was well fitted to the Langmuir isotherm model. The magnetic chelating beads could be rapidly recovered from aqueous solution by an external magnetic field, regenerated and reused for 5 cycles without significant lost in adsorption capacity. The results of this work indicated that the surface functionalization by click reaction could be a simple and suitable method for the preparation of polymeric adsorbents for an effective removal of metal ions from aqueous solution. (C) 2015 Elsevier B.V. All rights reserved.
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