Ma Yue, Pan Jinjiao, Rong Huazhen, Liu Lu, Zhang Yilei, Cao Xuewen, Zhang Jiacheng, Liu Tao, Wang Ning, Yuan Yihui
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228, P. R. China.
Adv Sci (Weinh). 2025 Aug;12(30):e00697. doi: 10.1002/advs.202500697. Epub 2025 May 20.
The leakage of nuclear pollution highlights the critical importance of effectively separating radioactive pollutants. Radioactive iodine, a high-yield fission product of nuclear reactions, poses serious environmental and health risks. However, the lack of efficient adsorbents makes the management of aqueous radioactive iodine pollution a significant challenge. N-doped materials are among the most recognized adsorbents for iodine removal, but their weak binding affinity and limited number of iodine-binding N-sites hinder their practical application. Herein, a covalent organic framework (COFs) named phen-TPA is synthesized, featuring an increased number and optimized local chemical environment of iodine-binding N-sites. This material demonstrates record-breaking iodine removal kinetics, with a kinetic constant of 14.64 g g min for aqueous iodine (I), and the highest-reported iodine adsorption capacity of 11.9 g g for aqueous triiodide (I ). Large-scale flow-through adsorption experiments show that phen-TPA can remove 99.5% aqueous I and I from high-salinity aqueous environments, highlighting its potential for practical applications.
核污染泄漏凸显了有效分离放射性污染物的至关重要性。放射性碘作为核反应的高产裂变产物，对环境和健康构成严重风险。然而，缺乏高效吸附剂使得水相放射性碘污染的治理成为一项重大挑战。氮掺杂材料是最受认可的碘去除吸附剂之一，但其较弱的结合亲和力和有限数量的碘结合氮位点阻碍了它们的实际应用。在此，合成了一种名为phen-TPA的共价有机框架（COF），其碘结合氮位点数量增加且局部化学环境得到优化。该材料展现出破纪录的碘去除动力学，对水相碘（I）的动力学常数为14.64 g g⁻¹ min⁻¹，对水相三碘化物（I₃⁻）的碘吸附容量为11.9 g g⁻¹，是已报道的最高值。大规模流通吸附实验表明，phen-TPA能够从高盐度水环境中去除99.5%的水相I和I₃⁻，凸显了其实际应用潜力。
