Degradation of fluoroquinolones in homogeneous and heterogeneous photo-Fenton processes: A review.

Yejing Gou, Peng Chen, Lang Yang, Shengjun Li, Lai Peng, Shaoxian Song, Yifeng Xu

Chemosphere 2021 May

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Fluoroquinolone antibiotics are frequently detected in the environment causing potential hazards to ecological and human health. Inadequate removal efficiencies were reported for fluoroquinolones during conventional wastewater treatment processes whereas the application of photo-Fenton reactions has attracted much attention due to their high reaction rate. This article summarizes the recent proceedings on homogeneous and heterogeneous photo-Fenton degradation of fluoroquinolones. Degradation efficiencies of fluoroquinolones were discussed as well as rate constants for a distinct comparison. The influences of initial fluoroquinolone concentration, H2O2, Fe2+, pH and temperature were also investigated on homogeneous photo-Fenton degradation of fluoroquinolones. The currently applied heterogenous catalysts were considered including iron oxides catalysts, iron-based composite catalysts and iron-based semiconductor. In addition, the degradation pathways for typical fluoroquinolones were proposed with the products identified in the literature. The results indicated the better performance with the aid of heterogeneous catalysts due to the generation of more active species. Intermediate products at smaller molecular weight were obtained through various types of pathways under heterogeneous photo-Fenton degradation of fluoroquinolones, implying a practical application with biological treatment processes for fully mineralization. Copyright © 2020 Elsevier Ltd. All rights reserved.

Citation

Yejing Gou, Peng Chen, Lang Yang, Shengjun Li, Lai Peng, Shaoxian Song, Yifeng Xu. Degradation of fluoroquinolones in homogeneous and heterogeneous photo-Fenton processes: A review. Chemosphere. 2021 May;270:129481