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Journal of Materials Science
Erschienen in: Journal of Materials Science 20/2018

22.06.2018 | Polymers

Preparation of an ionic liquid-based hydrogel with hyperbranched topology for efficient removal of Cr(VI)

verfasst von: Kexuan Li, Liwei Qian, Wenqi Song, Min Zhu, Yuzhen Zhao, Zongcheng Miao

Erschienen in: Journal of Materials Science | Ausgabe 20/2018

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Abstract

An imidazolium salt-based hydrogel with hyperbranched topology (hbGel-PEG-TTIm+Br 6 − ) was proposed for efficient adsorption towards anionic hexavalent chromium ions (Cr(VI)). For the purpose, a bromo-terminated A3 type monomer and a imidazole-terminated B3 type monomer were firstly synthesized via O-esterification and Michael addition, respectively. Then, hbGel-PEG-TTIm+Br 6 − was obtained by the one-pot step polymerization of “A3 + B3” approach via N-alkylation reaction. The chemical structure and morphology of the as-prepared hydrogel were confirmed by Fourier transform infrared and scanning electron microscope. The cross-linking network structure was calculated according to the Flory–Rehner equilibrium swelling equation. The effects of solution pH, adsorbent dosage, contact time and initial Cr(VI) concentration on the adsorption performance were also investigated, and the maximum adsorption capacity could reach ~ 238 mg g−1. In addition, the adsorption process of Cr(VI) on hbGel-PEG-TTIm+Br 6 − was well described by the pseudo-second-order kinetic model, and the adsorption equilibrium data fitted with Langmuir isotherm model better than Freundlich isotherm model. This novel hydrogel with hyperbranched topology can potentially be applied in the treatment of wastewater containing Cr(VI).
Vorheriger Artikel Calcium alginate-coated electrospun polyhydroxybutyrate/carbon nanotubes composite nanofibers as nanofiltration membrane for dye removal
Nächster Artikel Multiscale description and prediction of the thermomechanical behavior of multilayered plasticized PVC under a wide range of strain rate

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Metadaten
Titel
Preparation of an ionic liquid-based hydrogel with hyperbranched topology for efficient removal of Cr(VI)
verfasst von
Kexuan Li
Liwei Qian
Wenqi Song
Min Zhu
Yuzhen Zhao
Zongcheng Miao
Publikationsdatum
22.06.2018
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 20/2018
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-018-2609-5

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