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Highly efficient removal of uranium(VI) from aqueous solutions by poly(acrylic acid-co-acrylamide) hydrogels

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Abstract

In this study, poly(acrylic acid-co-acrylamide) (PAAAM) hydrogels were used to remove uranium (VI) ions in wastewater and characterized by FTIR, SEM, EDX. The effects of pH value, coexistence of ionic strength, contact time, initial U (VI) ion concentration and adsorption temperature were also studied. Adsorption data fitted well with pseudo-second-order, intra-particle diffusion model and Langmuir isotherm mode, the maximum adsorption capacity of U(VI) was 713.24 mg g−1. Thermodynamic analysis shows that the adsorption of U(VI) is spontaneous endothermic. PAAAM hydrogel has excellent regeneration performance, after five time adsorption–desorption cycles, the adsorbent still maintained 99.24% adsorption capacity.

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Authors and Affiliations

  1. Key Laboratory of Pharmaceutical Preparations, College of Chemistry, Fuzhou University, Fuzhou, 350108, People’s Republic of China

    Congcong Wei, Meixia Yang, Yingyuan Guo, Wenkai Xu, Junjie Gu, Minrui Ou & Xiaoping Xu

  2. Key Laboratory of Bipharmaceutical, College of Chemistry, Fuzhou University, Fuzhou, 350108, People’s Republic of China

    Congcong Wei, Meixia Yang, Yingyuan Guo, Wenkai Xu, Junjie Gu, Minrui Ou & Xiaoping Xu

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  1. Congcong Wei
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  2. Meixia Yang
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  3. Yingyuan Guo
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Correspondence to Xiaoping Xu.

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Wei, C., Yang, M., Guo, Y. et al. Highly efficient removal of uranium(VI) from aqueous solutions by poly(acrylic acid-co-acrylamide) hydrogels. J Radioanal Nucl Chem 315, 211–221 (2018). https://doi.org/10.1007/s10967-017-5653-8

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