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Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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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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Ion Exchange01:17

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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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Predicting Precipitation
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Updated: Aug 26, 2025

An Efficient Method for Selective Desalination of Radioactive Iodine Anions by Using Gold Nanoparticles-Embedded Membrane Filter
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Multi-Functionalization Integration into the Electrospun Nanofibers Exhibiting Effective Iodine Capture from Water.

Dingyang Chen1, Tingting Ma1, Xinyue Zhao1

  • 1Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun130024, China.

ACS Applied Materials & Interfaces
|October 6, 2022
PubMed
Summary

Novel electrospun fiber adsorbents efficiently capture radioiodine from water. These new materials show high capacity and are suitable for practical applications in nuclear energy and environmental protection.

Keywords:
N-containing functional groupsUiO-66-NH2electrospinningfiber adsorbentsiodine capture

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Nuclear Engineering

Background:

  • Radioiodine capture is crucial for nuclear energy sustainability and environmental protection.
  • Existing adsorbents have limitations in capacity and practical application due to their powder form.

Purpose of the Study:

  • To develop novel electrospun fiber adsorbents with enhanced radioiodine capture capabilities.
  • To overcome the limitations of current adsorbents for practical applications.

Main Methods:

  • Fabrication of electrospun fiber adsorbents (N-MOF-PAN fibers) integrating quaternary ammonium groups, amine groups, and porous MOF material (UiO-66-NH2).
  • Testing adsorption efficiency for iodine (I2) and triiodide (I3-) from aqueous solutions.
  • Characterization and mechanism analysis of the adsorption process.
  • Evaluation of dynamic iodine capture using an adsorption column.

Main Results:

  • N-MOF-PAN fibers achieved 94.6% removal of iodine from saturated I2 solution and 98.7% removal from I3- solution.
  • High iodine uptake capacities were recorded: 3.56 g g-1 from concentrated KI/I2 solution and 3.61 g g-1 from the Langmuir isotherm model.
  • Macroscopic fiber architecture enabled dynamic iodine capture in a column with a bed volume of 1490 mL, outperforming activated carbons.
  • Mechanism analysis revealed synergistic physical and chemical adsorption via multiple active sites.

Conclusions:

  • The developed N-MOF-PAN fibers demonstrate superior performance for radioiodine capture from aqueous solutions.
  • The multi-functionalization strategy and fiber form factor offer significant advantages for practical applications.
  • This research provides a promising direction for designing advanced adsorbents in nuclear and environmental fields.