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Structure-Property Relationships in 5-Aminosalicylic Acid-Functionalized Poly(GMA-co-EGDMA) Microspheres: Porosity, Thermal Stability, and Cr(VI) Sorption.

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Porous Copolymers of 3-(Trimethoxysilyl)propyl Methacrylate with Trimethylpropane Trimethacrylate Preparation: Structural Characterization and Thermal Degradation.

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A Facile Synthetic Method to Obtain Bismuth Oxyiodide Microspheres Highly Functional for the Photocatalytic Processes of Water Depuration
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Amine-Functionalized Porous Copolymeric Microspheres for Efficient Chromium(VI) Removal: Synthesis and

Małgorzata Maciejewska1, Grzegorz Wójcik2

  • 1Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, Gliniana 33, 20-614 Lublin, Poland.

Materials (Basel, Switzerland)
|May 27, 2026
PubMed
Summary

Researchers developed porous amine-functionalized polymers for chromium(VI) removal. TMPTMA-crosslinked copolymers showed superior adsorption due to better pore accessibility, highlighting a key factor in designing effective sorbent materials.

Keywords:
amine-modified adsorbentschromium(VI) removalepoxy-functional polymersporous polymer microspheres

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Area of Science:

  • Polymer Chemistry
  • Environmental Science
  • Materials Science

Background:

  • Hexavalent chromium (Cr(VI)) poses significant environmental and health risks.
  • Developing efficient and cost-effective sorbent materials for Cr(VI) remediation is crucial.

Purpose of the Study:

  • To synthesize and characterize porous glycidyl methacrylate-based copolymers functionalized with triethylenetetramine.
  • To investigate the impact of monomer composition and crosslinker type on porosity and epoxy content.
  • To evaluate the performance of these modified copolymers for Cr(VI) removal.

Main Methods:

  • Suspension-emulsion polymerization to create porous copolymers.
  • Functionalization with triethylenetetramine to introduce amine groups.
  • Attenuated Total Reflectance Fourier-Transform Infrared Spectroscopy (ATR-FTIR) and elemental analysis for characterization.
  • Batch adsorption experiments to assess Cr(VI) removal efficiency and capacity.

Main Results:

  • Increasing glycidyl methacrylate (GMA) content enhanced epoxy functionality but reduced specific surface area.
  • Successful amine functionalization was confirmed, maintaining porosity.
  • Adsorption of Cr(VI) was pH-dependent, with optimal removal at pH 3.
  • TMPTMA-crosslinked copolymers demonstrated a higher maximum sorption capacity (165.47 mg/g) compared to EGDMA-based ones.
  • Pore accessibility was identified as a more critical factor than amine group density for adsorption efficiency.

Conclusions:

  • Porous amine-functionalized copolymers can be effectively synthesized for Cr(VI) removal.
  • TMPTMA-based copolymers offer superior performance due to optimized pore structure and accessibility.
  • This study provides valuable insights for designing advanced polymer sorbents for heavy metal remediation.