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<p>The escalating pollution of limited freshwater resources by ECs represents a critical byproduct of modern industrialization. Pharmaceutical compounds, specifically NSAIDs like ACM and ASP, are frequently detected in aquatic environments because conventional wastewater treatment plants are incapable of their complete degradation. This study evaluates the feasibility of using a high-energy Rhodotron accelerator (E-beam) as an AOP for the removal of ACM and ASP from aqueous solutions. The influence of three independent variables—initial pollutant concentration (50–100 µgL<sup>− 1</sup>), initial pH (3–11), and absorbed dose (5–20&#xa0;kGy)—was investigated and optimized using RSM-CCD. Statistical analysis (ANOVA) confirmed that the quadratic model provided a superior fit for both compounds, with R<sup>2</sup> values of 0.9958 for ACM and 0.9724 for ASP. Optimization results indicated that the maximum degradation efficiency for ACM (84.72%) and mineralization (61.78%) was achieved at 75 µgL<sup>− 1</sup> initial concentration, 12&#xa0;kGy dose, and pH 7. For ASP, the highest efficiency (88.42%) and mineralization (65.7%) occurred at 75 µgL<sup>− 1</sup>, 12&#xa0;kGy, and pH 7. Mechanistic studies using TBA revealed that <sup>•</sup>OH are the primary reactive species driving degradation. These foundational findings demonstrate that Rhodotron-based E-beam irradiation has the strong potential to serve as a highly efficient and “green” technology, providing critical baseline kinetics necessary for the future scale-up and remediation of refractory pharmaceutical-laden effluents.</p>

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Optimizing the radiolytic degradation of aspirin and acetaminophen in aqueous solutions using a Rhodotron electron-beam accelerator and central composite design

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月1日

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  • Niloufar Borhani Yazdi,
  • Arshia Gharagozlou,
  • Shiva Ghiasvand,
  • Hawzhin Amanollahi,
  • Samira Sheikhi,
  • Milad Nasimi,
  • Morteza Dadvar,
  • Ehsan Abouee Mehrizi

摘要

The escalating pollution of limited freshwater resources by ECs represents a critical byproduct of modern industrialization. Pharmaceutical compounds, specifically NSAIDs like ACM and ASP, are frequently detected in aquatic environments because conventional wastewater treatment plants are incapable of their complete degradation. This study evaluates the feasibility of using a high-energy Rhodotron accelerator (E-beam) as an AOP for the removal of ACM and ASP from aqueous solutions. The influence of three independent variables—initial pollutant concentration (50–100 µgL− 1), initial pH (3–11), and absorbed dose (5–20 kGy)—was investigated and optimized using RSM-CCD. Statistical analysis (ANOVA) confirmed that the quadratic model provided a superior fit for both compounds, with R2 values of 0.9958 for ACM and 0.9724 for ASP. Optimization results indicated that the maximum degradation efficiency for ACM (84.72%) and mineralization (61.78%) was achieved at 75 µgL− 1 initial concentration, 12 kGy dose, and pH 7. For ASP, the highest efficiency (88.42%) and mineralization (65.7%) occurred at 75 µgL− 1, 12 kGy, and pH 7. Mechanistic studies using TBA revealed that •OH are the primary reactive species driving degradation. These foundational findings demonstrate that Rhodotron-based E-beam irradiation has the strong potential to serve as a highly efficient and “green” technology, providing critical baseline kinetics necessary for the future scale-up and remediation of refractory pharmaceutical-laden effluents.