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<p>The catalytic performance of Cu-Fe-LDH (LDH: layered double hydroxide) was tested for the degradation of the veterinary antibiotic, oxytetracycline hydrochloride (OTC-HCl), in catalytic wet air oxidation (CWAO) process. Box–Behnken design and the response surface methodology were used to study the effects of catalyst dosage, pH, and reaction temperature on OTC-HCl removal efficiency. The optimal CWAO conditions were determined by maximizing the degradation efficiency of OTC-HCl. Under the optimum reaction conditions (0.5&#xa0;g/L Cu-Fe-LDH catalyst loading, pH 7, atmospheric pressure, and 70&#xa0;°C reaction temperature) 91.75% OTC-HCl removal was achieved. The kinetic data were best described by an apparent pseudo–second-order kinetic model. The phytotoxicity tests performed by using <i>L. sativum</i> revealed that the germination index was 63.91% in the treated OTC-HCl solution.</p>

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Catalytic Wet Air Oxidation of Oxytetracycline Hydrochloride Using Cu-Fe Layered Double Hydroxide Catalyst: Response Surface Design and Modelling Reaction Kinetics

  • 期刊论文

  • 发表日期：

    2026年3月11日

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  • Merve Baraç,
  • Burcu Palas,
  • Gülin Ersöz

摘要

The catalytic performance of Cu-Fe-LDH (LDH: layered double hydroxide) was tested for the degradation of the veterinary antibiotic, oxytetracycline hydrochloride (OTC-HCl), in catalytic wet air oxidation (CWAO) process. Box–Behnken design and the response surface methodology were used to study the effects of catalyst dosage, pH, and reaction temperature on OTC-HCl removal efficiency. The optimal CWAO conditions were determined by maximizing the degradation efficiency of OTC-HCl. Under the optimum reaction conditions (0.5 g/L Cu-Fe-LDH catalyst loading, pH 7, atmospheric pressure, and 70 °C reaction temperature) 91.75% OTC-HCl removal was achieved. The kinetic data were best described by an apparent pseudo–second-order kinetic model. The phytotoxicity tests performed by using L. sativum revealed that the germination index was 63.91% in the treated OTC-HCl solution.