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<p>In this study, a zeolite/chitosan nanocomposite (ZCN) was synthesized using agricultural and industrial byproducts, specifically rice husk and aluminum waste, to effectively remove lead ions (Pb(II)) from contaminated water. The structural and chemical properties of the composite were elucidated through analytical techniques such as Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and zeta potential analysis. The adsorption performance was evaluated under various conditions, achieving a maximum removal efficiency of 99.9%. Notably, the sorbent demonstrated rapid adsorption capabilities, reaching 96.4% removal within just 5&#xa0;min. Kinetic models, including pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Elovich models, were applied to analyze the adsorption process, revealing that chemisorption predominates. Isotherm studies utilizing Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models confirmed monolayer adsorption on a homogeneous surface, with the Langmuir model providing the best fit. Additionally, thermodynamic analysis demonstrated that the adsorption process is endothermic and spontaneous, with increasing temperature enhancing removal efficiency and confirming the feasibility of Pb(II) ion adsorption onto ZCN. These findings underscore the potential of this sustainable nanocomposite as an effective solution for lead ion removal in wastewater treatment applications.</p>

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Innovative preparation and application of zeolite/chitosan nanocomposite from agricultural and industrial byproducts for lead ion removal

  • 期刊论文

  • 发表日期：

    2025年2月2日

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  • Talal B. Almeelbi,
  • Mohamed A. Hassan,
  • Marcus Makram,
  • Basel Yasser

摘要

In this study, a zeolite/chitosan nanocomposite (ZCN) was synthesized using agricultural and industrial byproducts, specifically rice husk and aluminum waste, to effectively remove lead ions (Pb(II)) from contaminated water. The structural and chemical properties of the composite were elucidated through analytical techniques such as Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and zeta potential analysis. The adsorption performance was evaluated under various conditions, achieving a maximum removal efficiency of 99.9%. Notably, the sorbent demonstrated rapid adsorption capabilities, reaching 96.4% removal within just 5 min. Kinetic models, including pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Elovich models, were applied to analyze the adsorption process, revealing that chemisorption predominates. Isotherm studies utilizing Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich models confirmed monolayer adsorption on a homogeneous surface, with the Langmuir model providing the best fit. Additionally, thermodynamic analysis demonstrated that the adsorption process is endothermic and spontaneous, with increasing temperature enhancing removal efficiency and confirming the feasibility of Pb(II) ion adsorption onto ZCN. These findings underscore the potential of this sustainable nanocomposite as an effective solution for lead ion removal in wastewater treatment applications.