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A magnetic hydrotalcite composite incorporating ternary metal components (Co(II), Mg(II), and Al(III)) was synthesized for the elimination of p-nitrophenol (PNP). The prepared material, designated as Fe3O4@CoMgAl-LDH, exhibited a notable adsorption performance, with its maximum adsorption capacity reaching up to 235.5 mg/g under the studied conditions. Adsorption isotherms and kinetic data were best described by the Liu isotherm and pseudo-second-order models, respectively. Thermodynamic analysis revealed the process to be spontaneous and exothermic, involving dual mechanisms: surface adsorption on the lamellar structure and interlayer anion exchange. This work advances the development of magnetic hydrotalcite composites by introducing ternary metal systems, broadening their applicability in wastewater treatment.

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Magnetic CoMgAl Hydrotalcite-Based Adsorbent Effectively Removes p-Nitrophenol

  • 会议论文

  • 发表日期：

    2026年

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  • Jianli Zhang,
  • Yuzhou Li,
  • Shanyong Cao,
  • Rusong Zhao,
  • Lingxi Zhao

摘要

A magnetic hydrotalcite composite incorporating ternary metal components (Co(II), Mg(II), and Al(III)) was synthesized for the elimination of p-nitrophenol (PNP). The prepared material, designated as Fe3O4@CoMgAl-LDH, exhibited a notable adsorption performance, with its maximum adsorption capacity reaching up to 235.5 mg/g under the studied conditions. Adsorption isotherms and kinetic data were best described by the Liu isotherm and pseudo-second-order models, respectively. Thermodynamic analysis revealed the process to be spontaneous and exothermic, involving dual mechanisms: surface adsorption on the lamellar structure and interlayer anion exchange. This work advances the development of magnetic hydrotalcite composites by introducing ternary metal systems, broadening their applicability in wastewater treatment.