Abstract Here, reaction of a chloromethylated metal-organic framework (MOF) MIL-101 with diaminomaleonitrile (DAMN) following with an amidoximation reaction successfully produced a novel amidoxime functionalized porous material (MIL-101-AO). The chelation of amidoxime group to uranium and the large specific surface area afforded MIL-101-AO excellent selective adsorption ability for U (VI) in aqueous solutions (586 mg·g−1). Furthermore, MIL-101-AO showed much stronger selective adsorption for U (VI) than other co-existing metallic ions in the artificial seawater (removal rate reached 96%). The influence factors on the adsorption process were evaluated by batch adsorption experiments under different condition. The process of adsorbing uranium on MIL-101-AO fitted with the Langmuir model and the pseudo-second-order kinetic model. The △H° and △G° values of uranium adsorption indicated that it was an endothermic heat process; a higher adsorption temperature could promote the adsorption on MIL-101-AO. All the experimental results indicated that MIL-101-AO was an adsorbent with the application value of extracting uranium in seawater.

中文翻译：

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通过二氨基马来腈中间体在氯甲基化 MIL-101(Cr) 上接枝偕胺肟基制备的从海水中回收铀的高效吸附剂

摘要在这里，氯甲基化金属有机骨架 (MOF) MIL-101 与二氨基马来腈 (DAMN) 的反应以及酰胺肟化反应成功地产生了一种新型的酰胺肟功能化多孔材料 (MIL-101-AO)。胺肟基团与铀的螯合和大的比表面积使 MIL-101-AO 对水溶液中的 U (VI) (586 mg·g-1) 具有优异的选择性吸附能力。此外，MIL-101-AO对U（VI）的选择性吸附比人工海水中的其他共存金属离子强得多（去除率达到96%）。通过不同条件下的批量吸附实验，评价了对吸附过程的影响因素。MIL-101-AO对铀的吸附过程符合Langmuir模型和准二级动力学模型。铀吸附的△H°和△G°值表明其为吸热过程；较高的吸附温度可以促进对 MIL-101-AO 的吸附。实验结果表明，MIL-101-AO是一种具有提取海水中铀应用价值的吸附剂。