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<p>This study addressed the widespread contamination problem of oxytetracycline (OTC) in the water environment and developed an advanced oxidation technology based on ferrous sulfide (FeS)/peroxymonosulfate (PMS) system. Through single-factor experiments, the effects of pH value, FeS dosage, PMS concentration, and initial OTC concentration on the OTC degradation in FeS/PMS system were explored, and the corresponding OTC degradation kinetics were analyzed. Based on results of single-factor experiments, 17 groups of three-factor and three-level response surface experiments were designed to find the optimal OTC removal conditions. Single-factor experiments suggested that the appropriated parameter ranges in the FeS/PMS system for removing OTC were pH (5.5-7.5), FeS (0.25-0.75 g/L), and PMS (1-3 mM). The ideal conditions obtained through response surface optimization were pH=6.68, FeS=0.545 g/L, and PMS=2.0 mM, corresponding to an OTC removal rate of 97.61%. The Analysis of Variance (ANOVA) demonstrated that the data from the response surface experiments fit with the quadratic model well (<i>R</i><sup>2</sup>= 0.9886).</p>

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Degradation of Oxytetracycline in Water by FeS-Activated Peroxymonosulfate: Response Surface Method Optimization and Kinetic Analysis

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Yongbo Xiao,
  • Yanjiao Gao,
  • Fan Bai,
  • Jingyi Yang,
  • Jiaxin Chen,
  • Jing Xiao

摘要

This study addressed the widespread contamination problem of oxytetracycline (OTC) in the water environment and developed an advanced oxidation technology based on ferrous sulfide (FeS)/peroxymonosulfate (PMS) system. Through single-factor experiments, the effects of pH value, FeS dosage, PMS concentration, and initial OTC concentration on the OTC degradation in FeS/PMS system were explored, and the corresponding OTC degradation kinetics were analyzed. Based on results of single-factor experiments, 17 groups of three-factor and three-level response surface experiments were designed to find the optimal OTC removal conditions. Single-factor experiments suggested that the appropriated parameter ranges in the FeS/PMS system for removing OTC were pH (5.5-7.5), FeS (0.25-0.75 g/L), and PMS (1-3 mM). The ideal conditions obtained through response surface optimization were pH=6.68, FeS=0.545 g/L, and PMS=2.0 mM, corresponding to an OTC removal rate of 97.61%. The Analysis of Variance (ANOVA) demonstrated that the data from the response surface experiments fit with the quadratic model well (R2= 0.9886).