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<p>This work aimed to assess and model the kinetics of bisphenol-S (BPS) removal and mineralization achieved by photo-Fenton-like treatment catalyzed by Cu<sub>2</sub>O/Al<sub>2</sub>O<sub>3</sub>. For this purpose, Cu<sub>2</sub>O nanoparticles were prepared by Laser Ablation in Liquid (LAL) and supported on commercial Al<sub>2</sub>O<sub>3</sub> powder to be used as catalyst in the degradation of bisphenol S (BPS) via a photo-Fenton-like oxidation process. The produced nanoparticles were characterized by Transmission Electronic Microscopy (TEM) and determined to have an average size of 11&#xa0;nm. For reference, the BPS removal was also monitored and modelled under photolysis with UV-C and UV-C plus H<sub>2</sub>O<sub>2</sub>. It was found that the experimental data for both BPS concentration and total organic carbon (TOC), are well fitted by a first-order kinetic model. Regarding temporal BPS concentration profiles, the pseudo-first order kinetic constant values were 0.961, 0.402 and 0.035&#xa0;min<sup>−1</sup> for photo-Fenton, UV-C + H<sub>2</sub>O<sub>2</sub> and photolysis, respectively; while for the temporal TOC concentration profiles the estimated pseudo-first order kinetic constant values were 0.086, 0.026 and 0.021&#xa0;min<sup>−1</sup> for photo-Fenton, UV-C + H<sub>2</sub>O<sub>2</sub> and photolysis, respectively. The effect of Cu content was also studied in the range of 0 to 2%. The kinetic constant was found to be approximately twice with the 2% Cu<sub>2</sub>O/Al<sub>2</sub>O<sub>3</sub> system than with the 0.5% Cu content, for both cases, temporal BPS concentration and TOC profiles. Thus, it was concluded that the prepared 2%Cu<sub>2</sub>O/Al<sub>2</sub>O<sub>3</sub> system is an excellent alternative to catalyze H<sub>2</sub>O<sub>2</sub> dissociation and conduct BPS mineralization by a photo-Fenton like process which leads to a near complete mineralization, <i>ca.</i> 94% in 30&#xa0;min.</p>

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Kinetics of Bisphenol-S Mineralization via Photo-Fenton-Like Process Catalyzed by Cu2O/Al2O3

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Oscar Olea-Mejia,
  • Kingsley Donkor,
  • Sharon Brewer,
  • Reyna Natividad

摘要

This work aimed to assess and model the kinetics of bisphenol-S (BPS) removal and mineralization achieved by photo-Fenton-like treatment catalyzed by Cu2O/Al2O3. For this purpose, Cu2O nanoparticles were prepared by Laser Ablation in Liquid (LAL) and supported on commercial Al2O3 powder to be used as catalyst in the degradation of bisphenol S (BPS) via a photo-Fenton-like oxidation process. The produced nanoparticles were characterized by Transmission Electronic Microscopy (TEM) and determined to have an average size of 11 nm. For reference, the BPS removal was also monitored and modelled under photolysis with UV-C and UV-C plus H2O2. It was found that the experimental data for both BPS concentration and total organic carbon (TOC), are well fitted by a first-order kinetic model. Regarding temporal BPS concentration profiles, the pseudo-first order kinetic constant values were 0.961, 0.402 and 0.035 min−1 for photo-Fenton, UV-C + H2O2 and photolysis, respectively; while for the temporal TOC concentration profiles the estimated pseudo-first order kinetic constant values were 0.086, 0.026 and 0.021 min−1 for photo-Fenton, UV-C + H2O2 and photolysis, respectively. The effect of Cu content was also studied in the range of 0 to 2%. The kinetic constant was found to be approximately twice with the 2% Cu2O/Al2O3 system than with the 0.5% Cu content, for both cases, temporal BPS concentration and TOC profiles. Thus, it was concluded that the prepared 2%Cu2O/Al2O3 system is an excellent alternative to catalyze H2O2 dissociation and conduct BPS mineralization by a photo-Fenton like process which leads to a near complete mineralization, ca. 94% in 30 min.