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<p>A macroporous Poly(2-Hydroxyethyl methacrylate-glycidyl methacrylate) [Poly(HEMA-GMA)] cryogel functionalized with Poly(L-lysine) (PLL) and Cu(II) ions was developed for the efficient removal of the anionic dye Acid Blue 113 from water. The cryogel was synthesized via free-radical cryopolymerization of HEMA and GMA at − 20&#xa0;°C, followed by covalent grafting of PLL through epoxy ring-opening reactions and subsequent coordination of Cu(II) ions with PLL amine groups. SEM analysis confirmed a highly interconnected macroporous structure, while BET analysis revealed specific surface areas ranging from 6.45 to 7.85&#xa0;m<sup>2</sup> g<sup>−1</sup> and average pore diameters between 36 and 41&#xa0;nm. Batch adsorption experiments demonstrated strong pH dependence, with maximum adsorption at pH 4.0. The Poly(HEMA-GMA)-PLL-Cu(II) cryogel exhibited a high adsorption capacity of 501.6&#xa0;mg g<sup>−1</sup> and reached equilibrium within 30&#xa0;min, indicating rapid adsorption kinetics. Kinetic data were best described by the pseudo-second-order model, while equilibrium data fitted well to the Langmuir isotherm, suggesting monolayer adsorption on homogeneous active sites. Additionally, the Cu(II)-containing cryogel exhibited notable antibacterial activity against several Gram-positive and Gram-negative bacteria. These findings demonstrate that the developed cryogel combines high adsorption capacity, rapid kinetics, and antimicrobial functionality, making it a promising material for advanced wastewater treatment applications.</p>

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Amine-functionalized copper-coordinated cryogels for efficient removal of Acid Blue 113 from water

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月12日

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  • Kadir Erol,
  • Demet Tatar,
  • Aysel Veyisoğlu,
  • Gönül Arslan Akveran,
  • İlknur Tosun Satır

摘要

A macroporous Poly(2-Hydroxyethyl methacrylate-glycidyl methacrylate) [Poly(HEMA-GMA)] cryogel functionalized with Poly(L-lysine) (PLL) and Cu(II) ions was developed for the efficient removal of the anionic dye Acid Blue 113 from water. The cryogel was synthesized via free-radical cryopolymerization of HEMA and GMA at − 20 °C, followed by covalent grafting of PLL through epoxy ring-opening reactions and subsequent coordination of Cu(II) ions with PLL amine groups. SEM analysis confirmed a highly interconnected macroporous structure, while BET analysis revealed specific surface areas ranging from 6.45 to 7.85 m2 g−1 and average pore diameters between 36 and 41 nm. Batch adsorption experiments demonstrated strong pH dependence, with maximum adsorption at pH 4.0. The Poly(HEMA-GMA)-PLL-Cu(II) cryogel exhibited a high adsorption capacity of 501.6 mg g−1 and reached equilibrium within 30 min, indicating rapid adsorption kinetics. Kinetic data were best described by the pseudo-second-order model, while equilibrium data fitted well to the Langmuir isotherm, suggesting monolayer adsorption on homogeneous active sites. Additionally, the Cu(II)-containing cryogel exhibited notable antibacterial activity against several Gram-positive and Gram-negative bacteria. These findings demonstrate that the developed cryogel combines high adsorption capacity, rapid kinetics, and antimicrobial functionality, making it a promising material for advanced wastewater treatment applications.