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	The improvement of boron-doped diamond anode system in electrochemical degradation of p-nitrophenol by zero-valent iron
	Zhu, Xiuping ; Ni, Jinren
	2011
关键词	Electrochemical oxidation Boron-doped diamond electrode Zero-valent iron p-Nitrophenol WASTE-WATER TREATMENT HYDROGEN-PEROXIDE HYDROXYL RADICALS AQUEOUS-SOLUTION ELECTRO-FENTON FERROUS ION OXIDATION PHENOL OXYGEN ACID
英文摘要	Boron-doped diamond (BDD) electrodes are promising anode materials in electrochemical treatment of wastewaters containing bio-refractory organic compounds due to their strong oxidation capability and remarkable corrosion stability. In order to further improve the performance of BDD anode system, electrochemical degradation of p-nitrophenol were initially investigated at the BDD anode in the presence of zero-valent iron (ZVI). The results showed that under acidic condition, the performance of BOO anode system containing zero-valent iron (BDD-ZVI system) could be improved with the joint actions of electrochemical oxidation at the BOO anode (39.1%), Fenton's reaction (28.5%), oxidation-reduction at zero-valent iron (17.8%) and coagulation of iron hydroxides (14.6%). Moreover, it was found that under alkaline condition the performance of BDD-ZVI system was significantly enhanced, mainly due to the accelerated release of Fe(II) ions from ZVI and the enhanced oxidation of Fe(II) ions. The dissolved oxygen concentration was significantly reduced by reduction at the cathode, and consequently zero-valent iron corroded to Fe(II) ions in anaerobic highly alkaline environments. Furthermore, the oxidation of released Fe(II) ions to Fe(III) ions and high-valent iron species (e.g., FeO(2+), FeO(4)(2-)) was enhanced by direct electrochemical oxidation at BOO anode. (C) 2011 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000298363600012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Electrochemistry; SCI(E); EI; CPCI-S(ISTP); 11
语种	英语
DOI标识	10.1016/j.electacta.2011.05.062
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158398]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zhu, Xiuping,Ni, Jinren. The improvement of boron-doped diamond anode system in electrochemical degradation of p-nitrophenol by zero-valent iron. 2011-01-01.

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