Porous materials are widely used in the adsorption field to sequester pollutants to address the global sustainable water security and water scarcity concerns. However, there are still challenges that limit their industrial application, especially the required rational design and construction of porous structures. Here, we report a high-swelling cyclodextrin polymer (His-CDP) that is facilely synthesized without additional design and templates, to achieve high affinity, non-specific and rapid adsorption of pollutants. His-CDP rapidly swells in water with high swelling ratio (706 %), and swelling results in a significant increase in the specific surface area (from 38 m²∙g⁻¹ of dry state to 562 m²∙g⁻¹ of wet state) and abundant adsorption sites. The adsorption rates of His-CDP for methylene blue (MB), bisphenol A (BPA), and copper ion (Cu²⁺) are 0.304 g∙mg⁻¹∙min⁻¹, 0.370 g∙mg⁻¹∙min⁻¹, and 0.117 g∙mg⁻¹∙min⁻¹, respectively, which are 106–571 times, 5–15 times, and 36–58 times higher than those of activated carbons and low-swelling cyclodextrin polymer. The maximum adsorption capacities of His-CDP for MB, BPA, and Cu²⁺ are 1.06 mol∙g⁻¹, 0.35 mol∙g⁻¹, and 1.95 mol∙g⁻¹, respectively. His-CDP has high stability, good reproducibility, cost-effective regeneration, and is expected to be produced on a large scale. As a demonstration application, we demonstrate that His-CDP outperforms activated carbons in rapid, high-capacity purification of tap water, treatment of industrial wastewater and remediation of polluted surface water. Our findings open the way for the application of high-swelling polymers in sustainable water purification.

中文翻译：

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用于可持续水净化的高溶胀性环糊精聚合物的简单合成


多孔材料广泛用于吸附领域，以封存污染物，以解决全球可持续水安全和水资源短缺问题。然而，仍然存在限制其工业应用的挑战，尤其是所需的多孔结构的合理设计和构造。在这里，我们报道了一种高溶胀性环糊精聚合物 （His-CDP），无需额外的设计和模板即可轻松合成，以实现高亲和力、非特异性和快速吸附污染物。His-CDP 在高溶胀率 （706 %） 的水中迅速膨胀，溶胀导致比表面积显著增加（从干态的 38 m²∙g⁻¹ 到湿态的 562 m²∙g⁻¹）和丰富的吸附位点。His-CDP 对亚甲蓝 （MB）、双酚 A （BPA） 和铜离子 （Cu²⁺） 的吸附速率分别为 0.304 g∙^mg-1∙^min-1、0.370 g∙^mg-1∙^min-1 和 0.117 g∙^mg-1∙^min-1，分别是活性炭和低溶胀性环糊精聚合物的 106-571 倍、5-15 倍和 36-58 倍。His-CDP 对 MB、BPA 和 Cu²⁺ 的最大吸附容量分别为 1.06 mol∙^g-1、0.35 mol∙^g-1 和 1.95 mol∙^g-1。His-CDP 稳定性高、重现性好、再生成本高，有望大规模生产。作为示范应用，我们证明了 His-CDP 在快速、高容量净化自来水、处理工业废水和修复受污染的地表水方面优于活性炭。 我们的研究结果为高溶胀聚合物在可持续水净化中的应用开辟了道路。