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Preparation of Chitosan-g-Poly (Vinylimidazole-co-2-Acrylamido-2-Methyl Propane Sulfonic Acid) Granular Hydrogel for Selective Adsorption of Hg2+

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Abstract

A granular hydrogel of chitosan-g-poly(vinylimidazole-co-2-acrylamido-2-methyl propane sulfonic acid) was successfully synthesized by one-step free radical polymerization based on the grafting backbone of chitosan and the monomers of vinylimidazole and 2-acrylamido-2-methyl propane sulfonic acid. The resulting hydrogel could be used as the adsorbent for the efficient and selective removal of Hg2+ ions from the aqueous solution. The adsorption results could be well described by the pseudo-second-order kinetic mode and the Langmuir isotherm model with a maximum adsorption capacity of 363.55 mg/g for Hg2+. Furthermore, the as-prepared granular hydrogel exhibited an excellent cycling stability for the adsorption of Hg2+ after multiple repeated adsorption-desorption process. It suggested that the obtained granular hydrogel has potential application for Hg2+ removal and recovery from wastewater.

A kind of granular hydrogel with excellent selectivity adsorption of Hg2+ ions was successfully synthesized by grafting polymerization of VIM and AMPS onto the CTS backbone via a facile free radical polymerization

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (21377135 and 21477135), “863” Project of the Ministry of Science and Technology, China (2013AA032003), and the Fundamental Research Funds for the Central Universities (lzujbky-2015-127).

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Authors and Affiliations

  1. Center of Eco-Materials and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China

    Feng Wang, Yian Zheng, Yongfeng Zhu & Aiqin Wang

  2. Gansu Key Laboratory for Environmental Pollution Prediction and Control, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China

    Yian Zheng

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Feng Wang & Yongfeng Zhu

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  1. Feng Wang
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Correspondence to Yian Zheng or Aiqin Wang.

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Wang, F., Zheng, Y., Zhu, Y. et al. Preparation of Chitosan-g-Poly (Vinylimidazole-co-2-Acrylamido-2-Methyl Propane Sulfonic Acid) Granular Hydrogel for Selective Adsorption of Hg2+ . Water Air Soil Pollut 227, 110 (2016). https://doi.org/10.1007/s11270-016-2812-4

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