Scalable and aqueous‐phase fabrication of engineered porous polymers with dual Lewis base sites for uranium extraction

Abstract Effective uranium recovery from wastewater is of significance for the uranium resources utilization and the environmental protection. Herein, the rationally engineered porous organic polymer (POP‐FD) with dual Lewis base sites is fabricated via an aqueous‐phase and scalable method, which achieves synergistic coordination and structural modulation. The decorated dual Lewis base sites can offer a favorable coordinative binding microenvironment. The constructed hierarchical porous channel and interfacial hydrophilic microenvironment can improve the accessibility of Lewis base sites and the diffusion of uranyl ions. Consequently, POP‐FD possesses a saturation U(VI) adsorption uptake of 977.51 mg g −1 within approximately 20 min. The recovery performance remains nearly 95% after scaled‐up synthesis, and POP‐FD delivers excellent selectivity over various metal ions (S.F. = 29–3844) and U(VI) adsorption capacity (316.81 mg g −1 ) in actual leach tailing wastewater. This study offers a promising microenvironment modulation strategy of POPs for green, high‐efficiency, and economic uranium extraction.