The efficient capture of uranium from wastewater is crucial for environmental remediation and the sustainable development of nuclear energy, yet it poses considerable challenges. In this study, amphiphilic ionic covalent organic framework intercalated into graphene oxide (GO) nanosheets functionalized with polyethyleneimine (PEI) were used to construct hybrid membranes with ultrafast uranium adsorption. These hybrid membranes achieved equilibrium in just 10 min and the adsorption capacity was as high as 358.8 mg g−1 at pH = 6. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) analyses revealed that the strong interaction between sulfonic acid groups and uranyl ions was the primary reason for the high adsorption capacity and selectivity. The extended transition state and natural orbitals for chemical valence (ETS–NOCV) analysis revealed that the interaction between the 7 s and 5f orbitals of uranyl and the 2p orbitals of S and O in the sulfonate was the primary reason for the strong interaction between the sulfonate and the uranyl ion. This research presents an effective method for the rapid extraction of uranium from wastewater.

中文翻译：

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插入功能化氧化石墨烯杂化膜中的坚固的两亲离子共价有机框架，用于从废水中超快速提取铀


从废水中有效捕获铀对于环境修复和核能的可持续发展至关重要，但也带来了相当大的挑战。在这项研究中，将两亲离子共价有机框架插入聚乙烯亚胺（PEI）功能化的氧化石墨烯（GO）纳米片中，用于构建具有超快铀吸附的杂化膜。这些杂化膜在短短 10 分钟内达到平衡，在 pH = 6 时吸附容量高达 358.8 mg g−1。X 射线光电子能谱 (XPS) 和密度泛函理论 (DFT) 分析表明，磺酸根之间的强相互作用酸性基团和铀酰离子是高吸附容量和选择性的主要原因。化学价态的扩展过渡态和自然轨道（ETS-NOCV）分析表明，铀酰的 7 s 和 5f 轨道与磺酸盐中 S 和 O 的 2p 轨道之间的相互作用是磺酸盐之间强相互作用的主要原因。磺酸根和铀酰离子。这项研究提出了一种从废水中快速提取铀的有效方法。