Cyclodextrin polymer networks synthesis via amine-functionalized tripodal crosslinker for ultra-rapid removal of PFAS from water

作者：Monu Verma, Youngmin Hong, Krishna P. Singh, Vinod Kumar, Shu-Yuan Pan, Cong Li, Gyandshwar Kumar Rao, Manisha Nanda, S. K. Arora, Hyunook Kim · 发表于：npj Clean Water · 年份：2025 · DOI：10.1038/s41545-025-00519-6 · 被引用次数：13 · 研究领域：Per- and polyfluoroalkyl substances research、Membrane Separation and Gas Transport、Effects and risks of endocrine disrupting chemicals

Herein, we developed a β-cyclodextrin (β-CD)-based polymer crosslinked with tripodal amine to demonstrate the synergetic effects of the superior adsorption of both short- and long-chain per- and polyfluoroalkyl substances (PFASs). Kinetics studies showed rapid adsorption (~100% for nine PFASs at 1 µg L −1 , except PFBA, and >86% at 200 µg L −1 individually) within 2 min. Isotherm results showed exceptional adsorption affinity and capacity, with K L = 0.310 ± 0.180 L mg −1 , q m = 246.20 ± 14.80 mg g −1 for PFBS, and K L = 0.980 ± 0.260 L mg −1 , q m = 587.10 ± 54.50 mg g −1 for PFOS, significantly outperforming traditional activated carbons and resins. Adsorbent performed effectively in PFASs-spiked industrial wastewater with 55–100% removal efficiencies, regardless of the presence of co-contaminants. The adsorption mechanism confirmed the combined role of hydrophobic inclusion within β-CD cavities and electrostatic interactions with amine groups. Overall, this work demonstrates an advanced molecular design strategy for the PFAS-contaminated water and wastewater treatment.