水解稳定的泡沫状HKUST-1@CMC复合材料实现了对U(VI)的高效分离。
Hydrolytically stable foamed HKUST-1@CMC composites realize high-efficient separation of U(VI).
作者信息
Zeng Dejun, Yuan Liyong, Zhang Pengcheng, Wang Lin, Li Zijie, Wang Youqun, Liu Yunhai, Shi Weiqun
机构信息
Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, Jiangxi, China.
出版信息
iScience. 2021 Aug 18;24(9):102982. doi: 10.1016/j.isci.2021.102982. eCollection 2021 Sep 24.
HKUST-1@CMC (HK@CMC) composites that show good acid and alkali resistance and radiation resistance were successfully synthesized by introducing carboxymethyl cellulose (CMC) onto the surface of HKUST-1 using a foaming strategy. For the first time, the composites were explored as efficient adsorbents for U(VI) trapping from aqueous solution, with encouraging results of large adsorption capacity, fast adsorption kinetics, and desirable selectivity toward U(VI) over a series of competing ions. More importantly, a hybrid derivative film was successfully prepared for the dynamic adsorption of U(VI). The results show that ∼90% U(VI) can be removed when 45 mg L U(VI) was passed through the film one time, and the removal percentage is still more than 80% even after four adsorption-desorption cycles, ranking one of the most practical U(VI) scavengers. This work offers new clues for application of the Metal-organic-framework-based materials in the separation of radionuclides from wastewater.
通过发泡策略将羧甲基纤维素（CMC）引入到HKUST-1表面，成功合成了具有良好耐酸、耐碱和耐辐射性能的HKUST-1@CMC（HK@CMC）复合材料。首次将该复合材料作为从水溶液中捕获U(VI)的高效吸附剂进行探索，结果令人鼓舞，其具有大吸附容量、快速吸附动力学以及对U(VI)相对于一系列竞争离子的理想选择性。更重要的是，成功制备了一种用于U(VI)动态吸附的混合衍生物膜。结果表明，当45 mg/L的U(VI)一次性通过该膜时，约90%的U(VI)可被去除，即使经过四次吸附-解吸循环后，去除率仍超过80%，是最实用的U(VI)清除剂之一。这项工作为金属有机框架基材料在从废水中分离放射性核素方面的应用提供了新线索。
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