Electrocatalytic properties of N-doped graphite felt in electro-Fenton process and degradation mechanism of levofloxacin

Chemosphere
Xiaocheng LiuLin Tang

Abstract

The degradation of antibiotic levofloxacin was investigated by dimensionally stable anode as well as modified cathode using low-cost chemical reagents of hydrazine hydrate and ethanol for electro-Fenton in an undivided cell at pH 3.0 under room temperature. Comparison of unmodified and modified cathode was performed. The apparent rate constant of levofloxacin decay was found to be 0.2883 min(-1) for graphite felt-10 with the best performance at 200 mA, which is lower than graphite felt at 400 mA. The optimum modified cathode showed a significant improvement of complete mineralization of levofloxacin, reaching a 92% TOC removal at 200 mA for 480 min higher than unmodified one at twice the current. Surface physicochemical properties and morphology were investigated by scanning electron microscope, contact angle and X-ray photoelectron spectroscopy. The electrochemical characterization of hydrogen evolution reaction was adopted to clarify a possible pathway for the higher mineralization of levofloxacin, indicating a potential pilot-scale study to the pollution with the similar structure.

Citations

Dec 1, 2017·Environmental Technology·E MugunthanP E Jagadeeshbabu
Dec 14, 2017·Environmental Technology·Zhonghua WangYang Liu
Oct 30, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Maryam Dolatabadi, Saeid Ahmadzadeh
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Jun 29, 2021·Chemosphere·Lorena A GoulartManuel A Rodrigo
Sep 10, 2021·Environmental Science and Pollution Research International·Jiawei Zhao, Yingjie Dai
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