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<p>Heavy metals are pollutants that are commonly found in high concentrations in both surface and groundwater, posing a threat to aquatic ecosystems and the health of populations. Given this problem, it is important to develop efficient materials through environmentally friendly synthesis methods as a sustainable alternative for the removal of these pollutants. In this study, a composite was synthesized using chitosan and zeolite as the mechanical support. The material was obtained by ionic cross-linking with a 1% w/v TPP solution. Pb(II) and Cd(II) removal tests were carried out for 7days at 25&#xa0;°C and different pH values. Metal concentrations were determined by atomic absorption spectrophotometry. The composite showed adsorption capacities of 120.39&#xa0;mg&#xa0;g<sup>−1</sup> for Pb(II) at pH 3 and 52.52&#xa0;mg&#xa0;g<sup>−1</sup> for Cd(II) at pH 7. Both precursor materials and the composite, before and after the adsorption process, were characterized in order to elucidate possible adsorption mechanisms.</p> Graphical abstract <p></p>

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Novel chitosan–zeolite composites for Pb(II) and Cd(II) removal from aqueous solutions

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • Karla Daniela García-Silva,
  • Alfredo Israel Flores-Rojas,
  • Nahum Andrés Medellín-Castillo,
  • Hilda Guadalupe Cisneros-Ontiveros,
  • Gladis Judith Labrada‑Delgado,
  • Juan Carlos Moreno-Piraján,
  • Paola Elizabeth Díaz-Flores,
  • Bridinette Thiodjio Sendja

摘要

Heavy metals are pollutants that are commonly found in high concentrations in both surface and groundwater, posing a threat to aquatic ecosystems and the health of populations. Given this problem, it is important to develop efficient materials through environmentally friendly synthesis methods as a sustainable alternative for the removal of these pollutants. In this study, a composite was synthesized using chitosan and zeolite as the mechanical support. The material was obtained by ionic cross-linking with a 1% w/v TPP solution. Pb(II) and Cd(II) removal tests were carried out for 7days at 25 °C and different pH values. Metal concentrations were determined by atomic absorption spectrophotometry. The composite showed adsorption capacities of 120.39 mg g−1 for Pb(II) at pH 3 and 52.52 mg g−1 for Cd(II) at pH 7. Both precursor materials and the composite, before and after the adsorption process, were characterized in order to elucidate possible adsorption mechanisms.

Graphical abstract