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Related Concept Videos

Ion Exchange01:17

Ion Exchange

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 basic...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...

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Related Experiment Video

Updated: Jun 20, 2026

Preparation of Poly(pentafluorophenyl acrylate) Functionalized SiO2 Beads for Protein Purification
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Preparation of Poly(pentafluorophenyl acrylate) Functionalized SiO2 Beads for Protein Purification

Published on: November 19, 2018

Anion exchange beads for PFAS capture using a polymerization-induced microphase separation approach.

Ali Arshad1, Jongho Back1, Katharine A Faber2

  • 1Department of Chemistry, University of Minnesota 207 Pleasant St. SE Minneapolis MN 55455-0431 USA hillmyer@umn.edu buhlmann@umn.edu.

RSC Applied Polymers
|June 19, 2026
PubMed
Summary
This summary is machine-generated.

New anion exchange beads effectively capture per- and poly-fluoroalkyl substances (PFAS) from water. These novel beads show higher affinity for PFAS at low concentrations and allow for complete desorption, offering a promising solution for environmental remediation.

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Published on: March 13, 2016

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Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles

Published on: March 13, 2016

Area of Science:

  • Environmental Chemistry
  • Polymer Science
  • Materials Science

Background:

  • Per- and poly-fluoroalkyl substances (PFAS) are persistent environmental contaminants found in numerous consumer products.
  • Their chemical stability and unique properties lead to environmental accumulation and human toxicity.
  • Current remediation methods, such as ion exchange, are employed for PFAS removal.

Purpose of the Study:

  • To synthesize novel anion exchange beads using Polymerization-induced microphase separation (PIMS) for efficient PFAS capture.
  • To evaluate the performance of these beads in removing various PFAS, including short-chain and long-chain variants.
  • To assess the desorption efficiency of captured PFAS for potential regeneration and reuse of the beads.

Main Methods:

  • Synthesis of anion exchange beads via PIMS using a poly(ε-caprolactone)-b-poly(4-vinylbenzyl chloride) macro chain transfer agent, styrene, and divinylbenzene.
  • Characterization of beads, including etching of poly(ε-caprolactone) and quaternization of poly(4-vinylbenzyl chloride) to form PB-Q beads.
  • Evaluation of PFAS removal kinetics (TFA, PFBA, PFOA) using pseudo-second-order and Langmuir isotherm analyses, comparing PB-Q beads with commercial Amberlite IRA 900.

Main Results:

  • PB-Q beads demonstrated significantly higher initial sorption rates for short-chain PFAS (TFA, PFBA) compared to Amberlite IRA 900.
  • While Amberlite IRA 900 showed higher initial sorption rates for long-chain PFOA, PB-Q exhibited stronger affinities for all tested PFAS at lower concentrations.
  • A methanol and NaCl solution achieved 100% desorption of captured PFAS from the PB-Q beads.

Conclusions:

  • The synthesized PB-Q anion exchange beads are effective for capturing PFAS, particularly at low environmental concentrations.
  • The tunable morphology and high surface accessibility of PIMS-derived beads contribute to their enhanced performance.
  • Complete desorption indicates the potential for regenerating and reusing these beads in sustainable PFAS remediation strategies.