Electro-oxidation of diclofenac at boron doped diamond: Kinetics and mechanism

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	Electro-oxidation of diclofenac at boron doped diamond: Kinetics and mechanism
	Zhao, Xu; Hou, Yining; Liu, Huijuan; Qiang, Zhimin; Qu, Jiuhui
刊名	ELECTROCHIMICA ACTA
	2009-07-01
卷号	54 期号:17 页码:4172-4179
关键词	Anti-inflammatory drugs Diclofenac Diamond electrode Anode oxidation Degradation mechanism
中文摘要	Diclofenac is a common anti-inflammatory drug. Its electrochemical degradation at boron doped diamond electrode was investigated in aqueous solution. The degradation kinetics and the intermediate products were studied. Results showed that electro-oxidation was effective in inducing the degradation of diclofenac with 30 mg/L initial concentration, ensuring a mineralization degree of 72% after a 4h treatment with the applied bias potential of 4.0 V. The effects of applied bias potential and addition of NaCl on diclofenac degradation were investigated. Different degradation mechanisms of diclofenac were involved at various applied bias potentials. With the addition of NaCl, some chlorination intermediates including dichlorodiclofenac were identified, which lead to the total organic carbon increase compared with the electrolysis process without NaCl addition at the reaction initial period. The main intermediates including 2,6-dichlorobenzenamine, 2,5-dihydroxybenzyl alcohol, and benzoic acid are identified at the time of 2 h. 1-(2,6-Dichlorocyclohexa-2,4-dienyl)indolin-2-one were also identified. These intermediates disappeared gradually with the extension of reaction time. Small molecular acids were identified finally. Based on these results, a degradation pathway of diclofenac was proposed. (C) 2009 Elsevier Ltd. All rights reserved.
WOS记录号	WOS:000266416800005
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21673]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Zhao, Xu,Hou, Yining,Liu, Huijuan,et al. Electro-oxidation of diclofenac at boron doped diamond: Kinetics and mechanism[J]. ELECTROCHIMICA ACTA,2009,54(17):4172-4179.
APA	Zhao, Xu,Hou, Yining,Liu, Huijuan,Qiang, Zhimin,&Qu, Jiuhui.(2009).Electro-oxidation of diclofenac at boron doped diamond: Kinetics and mechanism.ELECTROCHIMICA ACTA,54(17),4172-4179.
MLA	Zhao, Xu,et al."Electro-oxidation of diclofenac at boron doped diamond: Kinetics and mechanism".ELECTROCHIMICA ACTA 54.17(2009):4172-4179.