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<p>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<sup>−1</sup>, except PFBA, and &gt;86% at 200 µg L<sup>−1</sup> individually) within 2 min. Isotherm results showed exceptional adsorption affinity and capacity, with <i>K</i><sub>L</sub> = 0.310 ± 0.180 L mg<sup>−1</sup>, <i>q</i><sub>m</sub> = 246.20 ± 14.80 mg g<sup>−1</sup> for PFBS, and <i>K</i><sub>L</sub> = 0.980 ± 0.260 L mg<sup>−1</sup>, <i>q</i><sub>m</sub> = 587.10 ± 54.50 mg g<sup>−1</sup> 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.</p>

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

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月13日

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  • Monu Verma,
  • Youngmin Hong,
  • Krishna Pal Singh,
  • Vinod Kumar,
  • Shu-Yuan Pan,
  • Cong Li,
  • Gyandshwar Kumar Rao,
  • Manisha Nanda,
  • Sanjay Kumar Arora,
  • Hyunook Kim

摘要

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 KL = 0.310 ± 0.180 L mg−1, qm = 246.20 ± 14.80 mg g−1 for PFBS, and KL = 0.980 ± 0.260 L mg−1, qm = 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.