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<p>The persistent need for sorbents capable of efficiently extracting selenium from radioactive wastewater has been a significant challenge. Herein, we introduce SCU-CPN-5, a robust and saleable adsorbent designed through principles of valence and configuration matching, which achieves remarkable removal of selenium oxo-anions from nuclear waste liquids. SCU-CPN-5 demonstrates unprecedented adsorption capacities, with 617 mg/g for SeO<sub>4</sub><sup>2−</sup> and 333 mg/g for SeO<sub>3</sub><sup>2−</sup>. Additionally, it exhibits a removal efficiency of up to 99.7% for environmentally relevant concentrations of SeO<sub>4</sub><sup>2−</sup>. Notably, we employed <i>in-situ</i> Fourier-transform infrared spectroscopy to monitor the sorption process of selenium oxo-anions into the pores of the sorbent in real time, marking a significant advancement. This research not only introduces a novel approach to the design of functional materials for nuclear wastewater management but also provides a molecular-level understanding of the adsorption mechanism.</p>

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Construction of a novel cationic polymeric nanotrap using valence and configuration matching strategy for benchmark removal of selenium oxoanions from nuclear waste streams

  • 期刊论文

  • 发表日期：

    2025年2月6日

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  • Yunnan Tao,
  • Kui Tan,
  • Hongliang Huang,
  • Long Chen,
  • Bin Wang,
  • Chunyu Bao,
  • Junchang Chen,
  • Zhifang Chai,
  • Shuao Wang

摘要

The persistent need for sorbents capable of efficiently extracting selenium from radioactive wastewater has been a significant challenge. Herein, we introduce SCU-CPN-5, a robust and saleable adsorbent designed through principles of valence and configuration matching, which achieves remarkable removal of selenium oxo-anions from nuclear waste liquids. SCU-CPN-5 demonstrates unprecedented adsorption capacities, with 617 mg/g for SeO42− and 333 mg/g for SeO32−. Additionally, it exhibits a removal efficiency of up to 99.7% for environmentally relevant concentrations of SeO42−. Notably, we employed in-situ Fourier-transform infrared spectroscopy to monitor the sorption process of selenium oxo-anions into the pores of the sorbent in real time, marking a significant advancement. This research not only introduces a novel approach to the design of functional materials for nuclear wastewater management but also provides a molecular-level understanding of the adsorption mechanism.