Multifunctional β-Cyclodextrin Polymer for Simultaneous and Effective Removal of Organic Micropollutants, Heavy Metals, and Detrimental Microorganisms from Water

A new porous β-cyclodextrin-based polymer (PCD-Gs) adsorbent was synthesized by the copolymerization of allyl-β-CD and partially allylated gallic acid under different monomer feeding ratios. With a series of single-factor experiments, it was found that the PCD-Gs not only exhibited ultrarapid and efficient absorption capacity for bisphenol A and Cd(II) but also possessed strong bactericidal ability and good resistance to salt and acid. Multivariate analyses showed that there was no competitive adsorption but a positive effect between Cd(II) and bisphenol A on PCD-Gs in the binary system. Besides, the PCD-Gs had outstanding regeneration ability and removal efficiency even at environmentally relevant concentrations. Combined with 1H NMR analysis, a multimechanism was suggested that the polymer of PCD-Gs possesses multiple action sites and presents great potential for simultaneously and effectively removing organic micropollutants, metal ions, and detrimental microorganisms from contaminated water, which contributes to deep purification of water and simplification of the water treatment process.