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

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成果类型:
期刊论文
作者:
Liu, Xiaocheng;Yang, Danxing;Zhou, Yaoyu*;Zhang, Jiachao*;Luo, Lin;Meng, Sijun;Chen, Song;Tan, Mengjiao;Li, Zhicheng;Tang, Lin
通讯作者:
Zhou, Yaoyu;Zhang, Jiachao
作者机构:
[Liu, Xiaocheng; Tan, Mengjiao; Li, Zhicheng; Zhou, Yaoyu; Zhou, YY; Zhang, Jiachao; Yang, Danxing; Meng, Sijun; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
[Tang, Lin; Chen, Song] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构:
[Zhou, YY; Zhang, JC] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
语种:
英文
关键词:
Electro-Fenton;Levofloxacin;N-doped graphite felt;Hydrogen evolution reaction;Mechanism
期刊:
Chemosphere
ISSN:
0045-6535
年:
2017
卷:
182
页码:
306-315
基金类别:
National Natural Science Foundation of China [51579096]; National Key R&D Projects of China [2016YFC0403002]; Hunan Key Scientific Research Project [2015WK3016, 2016WK2010]; scientific Research Fund of Hunan Provincial Education Department [13C1082]
机构署名:
本校为第一且通讯机构
院系归属:
资源环境学院
摘要:
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<sup>&minus;1</sup>for graphite felt-10 with the best performance at 200&nbsp;mA, which is lower than graphite felt at 400&nbsp;mA. The optimum modified cathode showed a significant improvement of complete mineralization of levofloxacin, reaching a 92% TOC removal at 200&nbsp;mA for 480&nbsp;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&nbsp;with the similar structure. &copy;2017

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