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Peer reviewed
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Shi, Yu-Zhen; Hu, Qing-Hua; Gao, Xin; Zhang, Li; Liang, Ru-Ping; Qiu, Jian-Ding
Separation and purification technology, 05/2023, Volume: 312Journal Article
Display omitted •Indium-based MOF is synthesized for the efficient removal of iodine from both the vapor and aqueous.•In-MOF exhibits high hydrostability even in seawater for 30 days.•In-MOF shows high selectivity and adsorption capacity for I3-.•In-MOF shows high-efficiency removal for iodine in seawater. The highly efficient removal of radioactive iodine from nuclear accident-polluted seawater is of great significance for the purpose of environmental protection. Herein, we report an indium-based metal–organic framework, named In-MOF, for highly efficient removing iodine from seawater. In-MOF is constructed by In3+ ions coordinated with tris (4-(1H-imidazol-1-yl) phenyl) amine and exhibits high chemical stability even under seawater for 30 days. Due to the flexible one-dimensional linear structure and high-density charged imidazolium groups, In-MOF possesses a high adsorption capacity (1138 mg/g) for iodine in water. Furthermore, it exhibits high selectivity in the presence of competitive ions, due to forming the unique I-π interactions between iodine and the In-MOF. Notably, these excellent adsorption features endowed In-MOF successfully remove iodine from seawater with a high removal rate of 93.86%. These results are of fundamental importance to understanding iodine uptake and designing materials with high adsorption capacity.
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