Efficient uranium capture from wastewater holds great importance for the environmental remediation and sustainable development of nuclear energy, but it is a tremendous challenge. Herein, a facile and scalable approach is reported to fabricate functionalized hierarchical porous polymers (PPN-3) decorated with high density of phosphate groups for uranium adsorption. The as-constructed hierarchical porous structure could allow rapid diffusion of uranyl ions, while abundant phosphate groups that serve as adsorption sites could provide the high affinity for uranyl. Consequently, PPN-3 shows a high uranium adsorption uptake of 923.06 mg g and reaches adsorption equilibrium within simply 10 min in uranium-spiked aqueous solution. Moreover, PPN-3 affords selective adsorption of uranyl over multiple metal ions and possesses a rapid and high removal rate of U(VI) in real water systems. Furthermore, this study offers direct polymerization strategy for the cost-effective fabrication of phosphate-functionalized porous organic polymers, which may provide promising application potential for uranium extraction.

中文翻译：

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用于高效铀吸附的功能化分级多孔聚合物的简便且可扩展的合成

从废水中高效捕获铀对于环境修复和核能可持续发展具有重要意义，但也是一个巨大的挑战。在此，报道了一种简便且可扩展的方法来制造用高密度磷酸基团装饰的功能化分级多孔聚合物（PPN-3），用于铀吸附。所构建的分级多孔结构可以允许铀酰离子快速扩散，而作为吸附位点的丰富的磷酸基团可以为铀酰提供高亲和力。因此，PPN-3 显示出 923.06 mg g 的高铀吸附量，并在加铀水溶液中仅 10 分钟即可达到吸附平衡。此外，PPN-3对多种金属离子具有选择性吸附铀酰的能力，并且在实际水系统中对U(VI)具有快速且高的去除率。此外，这项研究为磷酸盐功能化多孔有机聚合物的经济高效制造提供了直接聚合策略，这可能为铀提取提供有前景的应用潜力。