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<p>The impact of antibiotic residues on human health and the environment has become a serious global concern. Scientists are developing new technologies to remove antibiotic pollutants from water, wastewater, and soil. This study presents an effective method for removing antibiotic residues from sewage using Cu-doped TiO₂ photocatalyst (Cu-TiO₂). Ciprofloxacin antibiotic residue (CFA) was selected as the model pollutant for this investigation due to its common use in the healthcare system. The result showed that Cu–TiO₂ effectively removes 94.1% and 85.7% of CFA from wastewater under solar and visible light, respectively. According to the Langmuir–Hinshelwood model, Cu–TiO₂ degrades CFA faster than TiO₂, with a half-life of 14.7&#xa0;min, whereas TiO₂ has a half-life of over 69&#xa0;min. Besides, the doped photocatalyst also presented high reusability, retaining 74.6% CFA degradation efficiency after five cycles and releasing less than 1.8% of Cu ions. Furthermore, this study investigated the effectiveness of the Cu–TiO₂ photocatalyst in mitigating health risks associated with antibiotic-resistant bacteria and evaluated its practical application.</p>

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Enhanced removal of antibiotic residues from wastewater using metal-doped TiO₂: mitigating the potential risk of antibiotic-resistant bacteria to human health

  • 期刊论文

  • 发表日期：

    2025年12月18日

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  • Kim Jitae,
  • Thi Thu Hien Chu,
  • Pham Thi-Huong

摘要

The impact of antibiotic residues on human health and the environment has become a serious global concern. Scientists are developing new technologies to remove antibiotic pollutants from water, wastewater, and soil. This study presents an effective method for removing antibiotic residues from sewage using Cu-doped TiO₂ photocatalyst (Cu-TiO₂). Ciprofloxacin antibiotic residue (CFA) was selected as the model pollutant for this investigation due to its common use in the healthcare system. The result showed that Cu–TiO₂ effectively removes 94.1% and 85.7% of CFA from wastewater under solar and visible light, respectively. According to the Langmuir–Hinshelwood model, Cu–TiO₂ degrades CFA faster than TiO₂, with a half-life of 14.7 min, whereas TiO₂ has a half-life of over 69 min. Besides, the doped photocatalyst also presented high reusability, retaining 74.6% CFA degradation efficiency after five cycles and releasing less than 1.8% of Cu ions. Furthermore, this study investigated the effectiveness of the Cu–TiO₂ photocatalyst in mitigating health risks associated with antibiotic-resistant bacteria and evaluated its practical application.