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<p>The global shift in per- and polyfluoroalkyl substance (PFAS) crisis towards (ultra-)short-chain congeners highlights the urgent need to design adsorbents with hydrophilic functions. However, current functional group immobilization modifications fail to balance efficiency with regeneration, limiting access to affordable (ultra-)short-chain PFAS-free potable water. Herein, we present a non-immobilized dynamic hydroxyl cycling strategy that uses only water to circularly drive commercial zeolite adsorption-regeneration processes, efficiently and sustainably removing various (ultra-)short-chain PFASs (C-F number: 1-6) from potable water. The enhanced nanopore accessibility and the formation of a “zeolite framework-confined water” dual-binding mode make the modified zeolite one of the highest capacity adsorbents reported (233.82-733.13 mg g<sup>-1</sup>). Notably, this methodology offers a potential low-cost, in-situ upgrade for existing purifiers, potentially providing healthy water to underdeveloped regions through 179 days of full-scale purification.</p>

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Dynamic hydroxyl cycle of zeolite for short and ultra-short chain PFAS free potable water

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月10日

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  • Yuanji Shi,
  • Minghao Yang,
  • Hongxin Mu,
  • Haidong Hu,
  • Hongqiang Ren

摘要

The global shift in per- and polyfluoroalkyl substance (PFAS) crisis towards (ultra-)short-chain congeners highlights the urgent need to design adsorbents with hydrophilic functions. However, current functional group immobilization modifications fail to balance efficiency with regeneration, limiting access to affordable (ultra-)short-chain PFAS-free potable water. Herein, we present a non-immobilized dynamic hydroxyl cycling strategy that uses only water to circularly drive commercial zeolite adsorption-regeneration processes, efficiently and sustainably removing various (ultra-)short-chain PFASs (C-F number: 1-6) from potable water. The enhanced nanopore accessibility and the formation of a “zeolite framework-confined water” dual-binding mode make the modified zeolite one of the highest capacity adsorbents reported (233.82-733.13 mg g-1). Notably, this methodology offers a potential low-cost, in-situ upgrade for existing purifiers, potentially providing healthy water to underdeveloped regions through 179 days of full-scale purification.