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<p>This study presents the development of a novel magnesium oxide (MgO) nano-sorbent synthesized via a sol–gel method incorporating gum Arabic extract. The resulting nanomaterial exhibited exceptional performance in removing Congo red dye and cadmium (II) ions from aqueous solutions. The characterization of a MgO using several analytical techniques, including scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Brunauer–Emmett–Teller (BET) surface area analysis. MgO nano-sorbent is revealed to have a large surface area of 65.33 m<sup>2</sup>/g. The kinetics adsorption was found to follow the pseudo-second-order kinetic model and the Langmuir isotherm model accurately described the adsorption equilibrium, with maximum adsorption capacities of 534.95 mg/g for cadmium (II) and 1129.92 mg/g for Congo red. Incorporating gum Arabic extract into the MgO nano-sorbent significantly enhanced its adsorption capacity and selectivity for Congo red and cadmium (II) ions. This study demonstrates the potential of gum Arabic-modified MgO as an effective and sustainable adsorbent for removing organic and metal pollutants from wastewater.</p>

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Green fabrication of magnesium oxide nano-sorbent using Gum Arabic for Congo red dye and cadmium ions elimination

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Fayez K. Alharbi,
  • Mohamed Ali Ben Aissa,
  • Noha Al-Awaji,
  • Alaa M. Younis,
  • Aisha A. Alshahrani,
  • Abueliz Modwi

摘要

This study presents the development of a novel magnesium oxide (MgO) nano-sorbent synthesized via a sol–gel method incorporating gum Arabic extract. The resulting nanomaterial exhibited exceptional performance in removing Congo red dye and cadmium (II) ions from aqueous solutions. The characterization of a MgO using several analytical techniques, including scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Brunauer–Emmett–Teller (BET) surface area analysis. MgO nano-sorbent is revealed to have a large surface area of 65.33 m2/g. The kinetics adsorption was found to follow the pseudo-second-order kinetic model and the Langmuir isotherm model accurately described the adsorption equilibrium, with maximum adsorption capacities of 534.95 mg/g for cadmium (II) and 1129.92 mg/g for Congo red. Incorporating gum Arabic extract into the MgO nano-sorbent significantly enhanced its adsorption capacity and selectivity for Congo red and cadmium (II) ions. This study demonstrates the potential of gum Arabic-modified MgO as an effective and sustainable adsorbent for removing organic and metal pollutants from wastewater.