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Degradation of the ciprofloxacin antibiotic by photo-Fenton reaction using a Nafion/iron membrane: role of hydroxyl radicals

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Abstract

Antibiotic pollution in waters is a major health issue that induces antimicrobial resistance and, in turn, the inefficacy of actual antibiotics to cure diseases. There is therefore a need for antibiotic removal from water and wastewater, yet actual remediation techniques are limited. Here, we studied the degradation of ciprofloxacin by the photo-Fenton reaction using a Nafion/Fe3+ membrane as catalyst, with focus on the effect of hydroxyl (·OH) on membrane stability and recycling. Concentration of ciprofloxacin and ·OH were measured by high-performance liquid chromatography (HPLC). The Nafion membrane was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), attenuated total reflection (ATR) and X-ray photoelectron spectroscopy (XPS). Results show that the Nafion/Fe3+ membrane degrades ciprofloxacin completely within 4 h. After membrane recycling, degradation efficiency is reduced due to the loss of Fe3+ ions during membrane regeneration. Moreover, ·OH alters the carbon backbone of the membrane.

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Acknowledgements

The authors gratefully acknowledge the support by Jilin Science and Technology Development Plan.

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Correspondence to Jiyan Liang or Yan Qin.

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Wang, F., Zhang, Y., Ming, H. et al. Degradation of the ciprofloxacin antibiotic by photo-Fenton reaction using a Nafion/iron membrane: role of hydroxyl radicals. Environ Chem Lett 18, 1745–1752 (2020). https://doi.org/10.1007/s10311-020-01018-5

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  • DOI: https://doi.org/10.1007/s10311-020-01018-5

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