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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Related Experiment Video

Updated: Feb 19, 2026

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
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Modulating Multiple Interactions in Poly(ionic Liquid)s for Efficient Removal of Per- and Polyfluoroalkyl Substances.

Xiaolong Liu1, Siying Chen1, Xinyue Fang1

  • 1College of the Environment and Ecology, Xiamen University, Xiamen 361102, China.

Environmental Science & Technology
|February 18, 2026
PubMed
Summary

A novel porous polymer, PDB-F, effectively removes harmful per- and polyfluoroalkyl substances (PFASs) from water. This material exhibits high adsorption capacity and reusability, offering a promising solution for PFAS contamination.

Keywords:
Poly(ionic liquid)sadsorptionmultiple interactionsper- and polyfluoroalkyl substances

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Area of Science:

  • Materials Science
  • Environmental Science
  • Polymer Chemistry

Background:

  • Poly(ionic liquids) (PILs) are underutilized for adsorbing per- and polyfluoroalkyl substances (PFASs).
  • Porous PILs offer potential for efficient contaminant removal.
  • Limited research exists on porous PILs for PFAS adsorption.

Purpose of the Study:

  • To develop and investigate novel imidazolium-based mesoporous PILs for PFAS removal.
  • To evaluate the adsorption capacity and mechanisms of these PILs for PFAS.
  • To assess the performance of the developed materials in various water matrices.

Main Methods:

  • Synthesis of imidazolium-based mesoporous PILs via free-radical copolymerization.
  • Characterization of PIL structure and properties.
  • Adsorption experiments to determine PFAS removal efficiency and capacity.
  • Investigation of adsorption mechanisms, including electrostatic, hydrophobic, pore filling, and fluorophilic interactions.

Main Results:

  • PDB-F demonstrated exceptional adsorption capacity for perfluorooctanoic acid (PFOA) (2471.7 mg/g at 25 °C).
  • Synergistic interactions (electrostatic, hydrophobic, pore filling, F-F) contribute to high PFAS adsorption.
  • PDB-F showed high efficacy in removing trace PFOA from diverse water matrices and adsorbed various PFASs.
  • The material exhibited excellent regeneration and reusability.

Conclusions:

  • PDB-F is a highly effective polymer-based adsorbent for PFAS removal.
  • Synergistic interactions are crucial for enhancing PFAS adsorption in porous PILs.
  • This research provides a foundation for designing advanced adsorbents for environmental remediation.