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<p>This study deals with the synthesis of an ecofriendly ZnO/zeolite nanocomposite (NC) using the impregnation method for the degradation of paracetamol (PAM) by photocatalysis. This drug, recognized as a persistent organic pollutant, is widely detected in wastewater and surface water. The obtained photocatalyst was characterized by FTIR, XRD, XPS, SEM-EDX, UV Vis, and photoluminescence techniques. The effect of various operating conditions (e.g., pH, photocatalyst dosage, and initial paracetamol concentration) on the PAM degradation was determined using an experimental design model. The results revealed that the maximum paracetamol removal efficiency of 98% was achieved under UV irradiation and 100% after 180&#xa0;min of exposure to sunlight using the ZnO/zeolite NC (50wt%/50wt%) at 22&#xa0;°C, a catalyst loading of 0.67 gL<sup>-1</sup>, an initial concentration of 40 mgL<sup>-1</sup>, and a pH of 8.39. The degradation process followed first-order kinetics. Additionally, free radical scavenging tests showed enhanced activity due to the zeolite’s internal electric field preventing electron–hole recombination. Total organic carbon (TOC) removal reached 57% (UV) and 56% (sunlight) in aqueous solutions, and 27% (UV) and 39% (sunlight) in pharmaceutical industry wastewater (PIWW). The catalyst demonstrated good recyclability over four cycles, confirming its sustainable, ecofriendly, and cost-effective potential for wastewater treatment.</p>

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Synthesis of a cost-effective ZnO/zeolite photocatalyst for paracetamol removal

  • 期刊论文

  • 发表日期：

    2025年9月3日

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  • Yassine Khmiri,
  • Afef Attia,
  • Nabil Jallouli,
  • Elodie Chabanon,
  • Catherine Charcosset,
  • Samia Mahouche-Chergui,
  • Lasaad Dammak,
  • Catia Algieri,
  • Sudip Chakraborty,
  • Raja Ben Amar

摘要

This study deals with the synthesis of an ecofriendly ZnO/zeolite nanocomposite (NC) using the impregnation method for the degradation of paracetamol (PAM) by photocatalysis. This drug, recognized as a persistent organic pollutant, is widely detected in wastewater and surface water. The obtained photocatalyst was characterized by FTIR, XRD, XPS, SEM-EDX, UV Vis, and photoluminescence techniques. The effect of various operating conditions (e.g., pH, photocatalyst dosage, and initial paracetamol concentration) on the PAM degradation was determined using an experimental design model. The results revealed that the maximum paracetamol removal efficiency of 98% was achieved under UV irradiation and 100% after 180 min of exposure to sunlight using the ZnO/zeolite NC (50wt%/50wt%) at 22 °C, a catalyst loading of 0.67 gL-1, an initial concentration of 40 mgL-1, and a pH of 8.39. The degradation process followed first-order kinetics. Additionally, free radical scavenging tests showed enhanced activity due to the zeolite’s internal electric field preventing electron–hole recombination. Total organic carbon (TOC) removal reached 57% (UV) and 56% (sunlight) in aqueous solutions, and 27% (UV) and 39% (sunlight) in pharmaceutical industry wastewater (PIWW). The catalyst demonstrated good recyclability over four cycles, confirming its sustainable, ecofriendly, and cost-effective potential for wastewater treatment.