Keeping water clean is of vital significance for human health and environmental protection. In order to remove organic micro-pollutants and natural organic substances in water bodies and kill pathogenic microorganisms simultaneously, this study synthesized a multifunctional porous β-cyclodextrin polymer with a high specific surface area by introducing quaternary ammonium groups and rigid benzene rings, respectively, which was then polymerized with crosslinking agent-4,4′-bis (chloromethyl)-1,1′-biphenyl (BCMBP) in an ionic liquid system. The grafting of quaternary ammonium groups was beneficial for the removal of negative-charged humic acid (HA) and sterilization. The introduction of numerous rigid structures during benzylation and Friedel-Crafts alkylation reaction could significantly improve the porosity and specific surface area of the polymer, conducive to the exposure of cyclodextrin binding sites and contaminant adsorption. By changing the proportions of quaternization and benzylation, the structure and surface properties of the polymer could be adjusted, thus further regulating the adsorption performance. Compared with activated carbon, the polymer named BQCD-BP with a huge surface area of 1133 m² g⁻¹ prepared under optimized conditions showed outstanding adsorption performance and sterilization ability. The pseudo-second-order kinetic constant of BQCD-BP reached 1.2058 g·mg⁻¹·min⁻¹, which was approximately 50 times greater than that of activated carbon (0.0256 g·mg⁻¹·min⁻¹) under the same experimental condition. The adsorption capacity of BQCD-BP to HA was twice as high as that to AC, and the antibacterial ability of BQCD-BP was significant, achieving 90% at the dosage of 1g L⁻¹. Moreover, the adsorption process was hardly affected by the hydrochemical conditions, and the polymer was easy to regenerate. In addition, the excellent adsorption and antibacterial performance of the polymer were also identified by natural water treatment. COD was almost completely removed, and the removal efficiency of TP reached 92% after contact with BQCD-BP. The sterilization rate of BQCD-BP to viable bacteria in complex water bodies reached 82%. Undoubtedly, BQCD-BP is a potential multifunctional water treatment material with reasonable design in the actual water purification.

保持水的清洁对人类健康和环境保护具有重要意义。为去除水体中的有机微污染物和天然有机物，同时杀灭病原微生物，本研究通过分别引入季铵基团和刚性苯环，合成了一种具有高比表面积的多功能多孔β-环糊精聚合物。然后在离子液体体系中与交联剂-4,4'-双（氯甲基）-1,1'-联苯（BCMBP）聚合。季铵基团的接枝有利于去除带负电荷的腐植酸（HA）和杀菌。在苄基化和傅-克烷基化反应过程中引入大量刚性结构可以显着提高聚合物的孔隙率和比表面积，有利于环糊精结合位点的暴露和污染物的吸附。通过改变季铵化和苄基化的比例，可以调节聚合物的结构和表面性质，从而进一步调节吸附性能。与活性炭相比，这种名为 BQCD-BP 的聚合物具有 1133 m 的巨大表面积在优化条件下制备的² g ^{-1表现出优异的吸附性能和杀菌能力。}BQCD-BP的准二级动力学常数达到1.2058 g·mg ^-1 ·min ^{-1 ，是相同条件下活性炭(0.0256 g·mg -1} ·min ^-1 )的约50倍。实验条件。BQCD-BP对HA的吸附能力是对AC的两倍，BQCD-BP的抑菌能力显着，在1g L ^{-1的用量下达到90%}. 此外，吸附过程几乎不受水化学条件的影响，聚合物易于再生。此外，通过天然水处理也鉴定了该聚合物优异的吸附和抗菌性能。COD几乎被完全去除，与BQCD-BP接触后TP的去除效率达到92%。BQCD-BP对复杂水体中活菌的杀菌率达到82%。毫无疑问，BQCD-BP在实际的水净化中是一种设计合理、具有潜力的多功能水处理材料。