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<p>To handle radioactive iodine, two polyethyleneimine-based (PEI) adsorbents (PEI-TC and PEI-CC) were synthesized through using terephthaloyl chloride (TC) and cyanuric chloride (CC) as the linker. The adsorption capacity of PEI-TC was 7.00 g/g for gas-phase iodine and 2.00 g/g for liquid-phase iodine, while for PEI-CC were 0.20 g/g and 1.11 g/g respectively. The adsorption behavior followed the pseudo-second-order equation and the Langmuir model. Both adsorbents can resist competitive anions and can be recycled for more than 5 times. The structure of the cross-linking agent affected the adsorption performance; the mechanism involved electrostatic attraction and <i>van der Waals</i> forces.</p> Graphical abstract <p></p>

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Preparation of PEI-based adsorbent and study on its iodine adsorption performance

  • 期刊论文

  • 发表日期：

    2025年11月11日

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  • Henglong Tang,
  • Mingyue Qian,
  • Zhu Long,
  • Dan Zhang,
  • Fubao Sun,
  • Alireza Ashori,
  • Jiang Xu,
  • Hang Zhao,
  • Chang Sun

摘要

To handle radioactive iodine, two polyethyleneimine-based (PEI) adsorbents (PEI-TC and PEI-CC) were synthesized through using terephthaloyl chloride (TC) and cyanuric chloride (CC) as the linker. The adsorption capacity of PEI-TC was 7.00 g/g for gas-phase iodine and 2.00 g/g for liquid-phase iodine, while for PEI-CC were 0.20 g/g and 1.11 g/g respectively. The adsorption behavior followed the pseudo-second-order equation and the Langmuir model. Both adsorbents can resist competitive anions and can be recycled for more than 5 times. The structure of the cross-linking agent affected the adsorption performance; the mechanism involved electrostatic attraction and van der Waals forces.

Graphical abstract