Efficient capture of Sr2+ from acidic aqueous solution by an 18-crown-6-ether-based metal organic framework
Efficient capture of Sr2+ from acidic aqueous solution by an 18-crown-6-ether-based metal organic framework
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18-冠-6-醚基金属有机骨架从酸性水溶液中有效捕获Sr2
DOI：
10.1039/d1ce00229e
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发表时间：
2021-04-03
期刊：
影响因子：
3.1
通讯作者：
Wang, Shuao
中科院分区：
文献类型：
--
作者：
Guo, Chenglong;Yuan, Mengjia;Wang, Shuao
在核事故中，在用过的燃料后处理和环境补救期间从酸性废液中捕获高放射性毒性Sr-90是期望的和具有挑战性的。本文中，我们展示了用18-冠-6-醚官能化的金属有机骨架材料（SNU-200），其对锶具有优异亲和力的特异性结合位点导致在酸性条件下优异的Sr 2+吸附能力。该材料表现出高吸附容量（44.37 mg g（-1）at pH = 3），显着的亲和力（Kd = 3.63 × 10（4）mL g（-1））和在干扰共存离子如Na+，K+，Cs+，Mg 2+和Ca 2+存在下的选择性。
The capture of highly radiotoxic Sr-90 from an acidic waste solution during used fuel reprocessing and environmental remediation in a nuclear accident is desirable and challenging. Herein, we show a metal organic framework material (SNU-200) functionalized with an 18-crown-6-ether, whose specific binding site with an excellent affinity toward strontium leads to excellent Sr2+ adsorption capability under acidic conditions. This material exhibits a high adsorption capacity (44.37 mg g(-1) at pH = 3), remarkable affinity (K-d = 3.63 x 10(4) mL g(-1)) and ultrahigh selectivity in the presence of interfering coexisting ions such as Na+, K+, Cs+, Mg2+, and Ca2+.