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<p>In this contribution, we report the synthesis of a poly(4-vinylpyridine)-reduced graphene oxide-magnetite (P4VP-rGO-Fe₃O₄) organo-magnetogel (OMG), designed for high-performance pollutant adsorption. In the OMG, rGO and Fe₃O₄ nanoparticles are in situ encapsulated during the chemical cross-linking of the 4-vinylpyridine polymer. The adsorption performance of OMG was evaluated using three model water pollutants, viz., organic dyes, heavy metal ions, and waterborne pathogens. The equilibrium adsorption capacity exceeded 400 mg/g for the organic dyes. Beyond dye removal, the OMG also adsorbed heavy metal ions, such as AsO<sub>2</sub><sup>−</sup>, Pb²⁺, Cr<sub>2</sub>O<sub>7</sub><sup>2−,</sup> and Cd²⁺ ions, with removal efficiencies exceeding 60% and adsorption capacities exceeding 200 mg/g. The OMG also exhibited remarkable antibacterial activity against <i>E. coli</i> and <i>S. Typhi</i>, with almost zero viability for <i>S. Typhi</i>. The OMG promises a broad-spectrum applicability in wastewater treatment, offering a sustainable and efficient solution for water decontamination.</p>

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Nanoparticle-encapsulated organo-magnetogels: crosslinked network for broad-spectrum pollutant removal

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月25日

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  • Sanjeevi Prasath Sridhar,
  • Sudha Uthaman,
  • Logesh Kumar Pandurangan,
  • Armin Kriele,
  • Debasish Saha,
  • Baohu Wu,
  • Velraj Parthiban,
  • Janaki Vembu Murugesan,
  • Balachandar Vijayakumar,
  • Stephan Förster,
  • Aurel Radulescu,
  • Brijitta Joseph

摘要

In this contribution, we report the synthesis of a poly(4-vinylpyridine)-reduced graphene oxide-magnetite (P4VP-rGO-Fe₃O₄) organo-magnetogel (OMG), designed for high-performance pollutant adsorption. In the OMG, rGO and Fe₃O₄ nanoparticles are in situ encapsulated during the chemical cross-linking of the 4-vinylpyridine polymer. The adsorption performance of OMG was evaluated using three model water pollutants, viz., organic dyes, heavy metal ions, and waterborne pathogens. The equilibrium adsorption capacity exceeded 400 mg/g for the organic dyes. Beyond dye removal, the OMG also adsorbed heavy metal ions, such as AsO2−, Pb²⁺, Cr2O72−, and Cd²⁺ ions, with removal efficiencies exceeding 60% and adsorption capacities exceeding 200 mg/g. The OMG also exhibited remarkable antibacterial activity against E. coli and S. Typhi, with almost zero viability for S. Typhi. The OMG promises a broad-spectrum applicability in wastewater treatment, offering a sustainable and efficient solution for water decontamination.