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<p>Biobased adsorbents such as chitosan due to nontoxic nature, biocompatibility, and accessibility can be used to blend with other polymers to develop their physical and chemical features. This study aims to fabricate a highly efficient adsorbent through the functionalization of Chitosan- Poly(Vinylpyrrolidone) (PVP) beads with l-arginine. The prepared nano-sorbent was well characterized via various analytical methods such as FTIR, BET, EDS, XRD, FESEM, and TGA and applied in the removal of amoxicillin and Hg (II). The optimal conditions for higher performance were assessed with the optimization of different factors including pH, dosage, time, and initial concentration for both pollutants. The prepared composite has demonstrated considerable adsorption capacity toward Hg(II) and amoxicillin with the highest adsorption capacities of 313.162 mg/g and 2800 mg/g, respectively, confirming the composite’s various adsorption mechanisms. Accordingly, the composite mostly follows the pseudo-second-order kinetics and the Langmuir adsorption isotherm model. The extraordinary adsorption capacity with the accompaniment of the porous structure of the prepared composite has a promising application for high-performance wastewater treatment.</p> Graphical abstract <p></p>

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L-Arginine-Functionalized Chitosan/Poly(Vinylpyrrolidone) Composite as a Novel Adsorbent for Efficient Removal of Hg (II) and Amoxicillin from Aqueous Medium

  • 期刊论文

  • 发表日期：

    2025年3月8日

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  • Mojtaba Azizi,
  • Mahdi Akhgari,
  • Maryam Esmkhani,
  • Hossein Ghafuri,
  • Shahrzad Javanshir

摘要

Biobased adsorbents such as chitosan due to nontoxic nature, biocompatibility, and accessibility can be used to blend with other polymers to develop their physical and chemical features. This study aims to fabricate a highly efficient adsorbent through the functionalization of Chitosan- Poly(Vinylpyrrolidone) (PVP) beads with l-arginine. The prepared nano-sorbent was well characterized via various analytical methods such as FTIR, BET, EDS, XRD, FESEM, and TGA and applied in the removal of amoxicillin and Hg (II). The optimal conditions for higher performance were assessed with the optimization of different factors including pH, dosage, time, and initial concentration for both pollutants. The prepared composite has demonstrated considerable adsorption capacity toward Hg(II) and amoxicillin with the highest adsorption capacities of 313.162 mg/g and 2800 mg/g, respectively, confirming the composite’s various adsorption mechanisms. Accordingly, the composite mostly follows the pseudo-second-order kinetics and the Langmuir adsorption isotherm model. The extraordinary adsorption capacity with the accompaniment of the porous structure of the prepared composite has a promising application for high-performance wastewater treatment.

Graphical abstract