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Updated: Jan 17, 2026

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
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Green innovation: Ascorbate-based polymers demonstrate excellent performance in removing Cr(VI).

Zhixuan Gong1, Junjie Liu1, Jia Wen2

  • 1College of Environmental Science and Engineering and Key Laboratory of Environmental Biology and Pollution Control (Ministry of Education), Hunan University, Changsha, 410082, China.

Journal of Environmental Management
|September 24, 2025
PubMed
Summary

A novel polymer material (APP) effectively removes toxic hexavalent chromium (Cr(VI)) from wastewater. This robust, reusable material functions across various pH levels, offering a sustainable solution for environmental remediation.

Keywords:
Ascorbic acidBulk materialCr(VI) remediationPolyethyleneiminePolyvinyl alcohol

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Area of Science:

  • Environmental Chemistry
  • Materials Science
  • Polymer Chemistry

Background:

  • Hexavalent chromium (Cr(VI)) poses significant risks to ecosystems and human health.
  • Existing nanomaterials for Cr(VI) removal face challenges with recycling, pH limitations, and poor mechanical strength.

Purpose of the Study:

  • To synthesize and evaluate a novel bulk-size polymer material (APP) for efficient Cr(VI) elimination from wastewater.
  • To address limitations of previous materials, focusing on recyclability, pH adaptability, and mechanical robustness.

Main Methods:

  • Green synthesis of macroporous polymer material (APP) using ascorbic acid, polyvinyl alcohol, and polyethyleneimine.
  • Characterization of APP's physical properties, including pore size, mechanical strength, and Cr(VI) adsorption capacity.
  • Investigation of Cr(VI) removal efficiency across different pH values and in mixed heavy metal solutions, along with reusability studies.

Main Results:

  • APP demonstrated high Cr(VI) removal efficiency (100% at pH 2, 80.4% at pH 11) and preferential adsorption in mixed heavy metal solutions.
  • The macroporous material (∼3-4 mm) exhibited excellent mechanical strength, toughness, and good reusability (>80% efficiency after 6 cycles).
  • Mechanisms involved electrostatic attraction, anion exchange, oxidation-reduction, and complexation.

Conclusions:

  • The synthesized APP material offers a promising, stable, and reusable solution for Cr(VI) removal from wastewater.
  • APP overcomes key limitations of prior materials, enabling effective treatment across a wider range of pH conditions.
  • This research presents a novel approach for developing functional, pH-adjustable materials for environmental remediation.