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<p>The preparation method of seafoam-sodium alginate porous hydrogel (SEP@PEI/SA) was established and optimized to prepare SEP@PEI/SA for the deep treatment of low-enriched uranium-containing wastewater(0–5.0&#xa0;mg·L<sup>−1</sup>). This article presents the preparation of a low-cost,efficient,and highly reusable SEP@PEI/SA through a simple crosslinking process. The experimental results showed that the adsorption fitted the pseudo-second-order kinetic model and maximum adsorption capacity of SEP@PEI/SA for U(VI) could reach 144.7&#xa0;mg·g<sup>−1</sup> and the removal efficiency could be 99.3% when pH = 6.0 and the initial mass concentration of uranium was 5.0&#xa0;mg·L<sup>−1</sup>. The presence of HA (Humic acid) causes a decrease in the removal of U(VI) by SEP@PEI/SA due to its own coordination with U(VI) and occupation of adsorption sites, and kinetic simulation results show that the adsorption of U(VI) by SEP@PEI/SA is a monomolecular-layer chemical adsorption, a spontaneous, exothermic process.The results indicate that SEP@PEI/SA hydrogel has great potential in practical uranium-caontaining wastewater.</p>

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Efficient removal of U(VI) and mechanism with seafoam-sodium alginate hydrogel in aqueous solution

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Yitao Qiu,
  • Yunfei Hu,
  • Shuibo Xie,
  • Jiaqi Huang,
  • Caixu Pan,
  • Zhitao Dong

摘要

The preparation method of seafoam-sodium alginate porous hydrogel (SEP@PEI/SA) was established and optimized to prepare SEP@PEI/SA for the deep treatment of low-enriched uranium-containing wastewater(0–5.0 mg·L−1). This article presents the preparation of a low-cost,efficient,and highly reusable SEP@PEI/SA through a simple crosslinking process. The experimental results showed that the adsorption fitted the pseudo-second-order kinetic model and maximum adsorption capacity of SEP@PEI/SA for U(VI) could reach 144.7 mg·g−1 and the removal efficiency could be 99.3% when pH = 6.0 and the initial mass concentration of uranium was 5.0 mg·L−1. The presence of HA (Humic acid) causes a decrease in the removal of U(VI) by SEP@PEI/SA due to its own coordination with U(VI) and occupation of adsorption sites, and kinetic simulation results show that the adsorption of U(VI) by SEP@PEI/SA is a monomolecular-layer chemical adsorption, a spontaneous, exothermic process.The results indicate that SEP@PEI/SA hydrogel has great potential in practical uranium-caontaining wastewater.