Posted by A high-swelling cyclodextrin polymer (His-CDP) is reported 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. It was demonstrated that His-CDP outperforms activated carbons in rapid, high-capacity purification of tap water, treatment of industrial wastewater and remediation of polluted surface water.
Kai Zhang, Yu Dai, Rui Liu, Yongli Shi, Guofei Dai, Fan Xia, Xiaojin Zhang (2025) Facile synthesis of high-swelling cyclodextrin polymer for sustainable water purification. Journal of Hazardous Materials 485, 136910. https://doi.org/10.1016/j.jhazmat.2024.136910