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<p>Rising levels of antibiotic residues in environmental water seriously threaten human and ecosystem health, necessitating effective wastewater treatment strategies. Secnidazole (SEC), a nitroimidazole antibiotic widely used in human and veterinary medicine, is considered an emerging environmental pollutant due to its persistence and potential ecological risks. In this study, a solvothermal approach was employed to synthesize a bimetallic Co/Cu-HKUST-1 metal–organic framework nanocomposite (Co/Cu-HKUST-1 MOF) using copper and cobalt metal nodes with benzene tricarboxylic acid as the organic linker in the presence of polyvinylpyrrolidone as a growth-directing agent. The synthesized nanocomposite was characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The prepared Co/Cu-HKUST-1 MOF demonstrated remarkable catalytic efficiency toward SEC reduction using sodium borohydride as a reducing agent, with the reaction monitored by UV–Vis spectroscopy. Complete reduction was achieved within 420&#xa0;s with a calculated rate constant (<i>k</i>) of 0.008&#xa0;s<sup>−1</sup>. Furthermore, the catalyst exhibited excellent stability and reusability over five successive cycles with minimal loss in catalytic activity. These findings support the potential application of Co/Cu-HKUST-1 MOF as a cost-effective and environmentally friendly nanocatalyst for wastewater remediation within the One Health framework.</p>

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Catalytic reduction of environmentally relevant nitroimidazole pollutant using bimetallic Co/Cu-metal–organic framework nanocatalyst

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Safaa Hussein Salah El-Din,
  • Dina A. MouslyEl Mously,
  • Amany Morsi,
  • Amr M. Mahmoud

摘要

Rising levels of antibiotic residues in environmental water seriously threaten human and ecosystem health, necessitating effective wastewater treatment strategies. Secnidazole (SEC), a nitroimidazole antibiotic widely used in human and veterinary medicine, is considered an emerging environmental pollutant due to its persistence and potential ecological risks. In this study, a solvothermal approach was employed to synthesize a bimetallic Co/Cu-HKUST-1 metal–organic framework nanocomposite (Co/Cu-HKUST-1 MOF) using copper and cobalt metal nodes with benzene tricarboxylic acid as the organic linker in the presence of polyvinylpyrrolidone as a growth-directing agent. The synthesized nanocomposite was characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The prepared Co/Cu-HKUST-1 MOF demonstrated remarkable catalytic efficiency toward SEC reduction using sodium borohydride as a reducing agent, with the reaction monitored by UV–Vis spectroscopy. Complete reduction was achieved within 420 s with a calculated rate constant (k) of 0.008 s−1. Furthermore, the catalyst exhibited excellent stability and reusability over five successive cycles with minimal loss in catalytic activity. These findings support the potential application of Co/Cu-HKUST-1 MOF as a cost-effective and environmentally friendly nanocatalyst for wastewater remediation within the One Health framework.