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<p>Bisphenol A (BPA), a widely used phenolic compound in plastics and resins, poses significant environmental and health risks due to its persistence and toxicity. This study presents a sustainable approach for BPA removal using zinc oxide nanoparticles (ZnO NPs) synthesized from the residue of the anodization solution, a typically discarded byproduct. The highest BPA degradation efficiency, 96.1%, was achieved using 0.3&#xa0;g/L ZnO and H₂O₂ at an initial concentration of 15&#xa0;mg/L under sunlight at pH 3 within 120&#xa0;min. Structural and morphological characterizations using XRD, FE-SEM, FT-IR, and UV–Vis spectroscopy confirmed the hexagonal wurtzite structure, spherical morphology with agglomeration, and an optical band gap of 3.35&#xa0;eV. RSM was employed to optimize degradation conditions, identifying pH as the most influential parameter. The ZnO catalyst demonstrated excellent reusability, maintaining activity across six cycles. These findings suggest the potential for converting anodization waste into an effective photocatalyst for environmental remediation.</p>

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Waste-to-Catalyst: Efficient Sunlight-Assisted Bisphenol A Degradation Using ZnO Nanoparticles Derived from Anodization Residue

  • 期刊论文

  • 发表日期：

    2025年10月25日

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  • Sevda Ildan Ozmen,
  • Cihan Gecgel,
  • Erdal Yabalak

摘要

Bisphenol A (BPA), a widely used phenolic compound in plastics and resins, poses significant environmental and health risks due to its persistence and toxicity. This study presents a sustainable approach for BPA removal using zinc oxide nanoparticles (ZnO NPs) synthesized from the residue of the anodization solution, a typically discarded byproduct. The highest BPA degradation efficiency, 96.1%, was achieved using 0.3 g/L ZnO and H₂O₂ at an initial concentration of 15 mg/L under sunlight at pH 3 within 120 min. Structural and morphological characterizations using XRD, FE-SEM, FT-IR, and UV–Vis spectroscopy confirmed the hexagonal wurtzite structure, spherical morphology with agglomeration, and an optical band gap of 3.35 eV. RSM was employed to optimize degradation conditions, identifying pH as the most influential parameter. The ZnO catalyst demonstrated excellent reusability, maintaining activity across six cycles. These findings suggest the potential for converting anodization waste into an effective photocatalyst for environmental remediation.