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Enhanced adsorption properties of interpenetrating polymer network hydrogels for heavy metal ion removal

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Abstract

In this study, sequential interpenetrating polymer network (IPN) hydrogels based on poly(polyethylene glycol diacrylate) poly(PEGDA) and poly(methacrylic acid) (PMAA) were prepared with enhanced adsorption properties for heavy metal ion removal. The swelling behavior and mechanical property of the IPN hydrogels were characterized. It was found that swelling ratio increased, and mechanical strength decreased with the PMAA content in the IPN. The IPN hydrogels were used to remove heavy metal ions from aqueous solution under the non-competitive condition. The effects of pH values of the feed solution at the range of 3–5 and PMAA content in the IPN on the adsorption capacity were investigated. The results indicated that the adsorption capacity of the IPN hydrogels increased with the pH values and PMAA content in the IPN. Furthermore, the synergistic complexation of metal ions with two polymer networks in the IPN was found in the adsorption studies. Regeneration studies suggested that metal rebinding capacity of the IPN hydrogels did not change significantly through repeated applications compared with the first run. It was concluded that the poly(PEGDA)/PMAA hydrogels could be used as fast-responsive, high capacity, and renewable sorbent materials in heavy metal removing processes.

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Acknowledgments

We express our gratitude to the education department of Jiangsu Province (natural science fund for colleges and universities, NO: 11KJB430013) and the Yancheng Institute of Technology (natural research fund, NO: XKR2011010). The project was supported by research fund of Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province and the Jiangsu Provincial Natural Science Foundation (NO: BK2009170).

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  1. Department of Polymer Materials and Engineering, School of Material Engineering, Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People’s Republic of China

    Jingjing Wang, Fang Liu & Jun Wei

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  1. Jingjing Wang
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  2. Fang Liu
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  3. Jun Wei
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Correspondence to Jingjing Wang.

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Wang, J., Liu, F. & Wei, J. Enhanced adsorption properties of interpenetrating polymer network hydrogels for heavy metal ion removal. Polym. Bull. 67, 1709–1720 (2011). https://doi.org/10.1007/s00289-011-0579-8

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  • DOI: https://doi.org/10.1007/s00289-011-0579-8

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