Electro-oxidation of perfluorooctanoic acid by carbon nanotube sponge   anode and the mechanism

doi:10.1016/j.chemosphere.2015.06.095

CORC > 北京大学 > 环境科学与工程学院

	Electro-oxidation of perfluorooctanoic acid by carbon nanotube sponge anode and the mechanism
	Xue, An ; Yuan, Zi-Wen ; Sun, Yan ; Cao, An-Yuan ; Zhao, Hua-Zhang
刊名	CHEMOSPHERE
	2015
关键词	Carbon nanotube sponge Perfluorooctanoic acid (PFOA) Electra-oxidation Adsorption PERFLUORINATED COMPOUNDS ENHANCED ADSORPTION DRINKING-WATER PHOTOCATALYTIC DECOMPOSITION ACTIVATED CARBON PFOA SULFONATE SURFACE SORPTION ENVIRONMENT
DOI	10.1016/j.chemosphere.2015.06.095
英文摘要	As an emerging persistent organic pollutant (POPs), perfluorooctanoic acid (PFOA) exists widely in natural environment. It is of particular significance to develop efficient techniques to remove low-concentration PFOA from the contaminated waters. In this work, we adopted a new material, carbon nanotube (CNT) sponge, as electrode to enhance electro-oxidation and achieve high removal efficiency of low-concentration (100 mu g L-1) PFOA from water. CNT sponge was pretreated by mixed acids to improve the surface morphology, hydrophilicity and the content of carbonyl groups on the surface. The highest removal efficiencies for low-concentration PFOA electrolyzed by acid-treated CNT sponge anode proved higher than 90%. The electro-oxidation mechanism of PFOA on CNT sponge anode was also discussed. PFOA is adsorbed on the CNT sponge rapidly increasing the concentration of PFOA on anode surface. When the potential on the anode is adjusted to more than 3.5 V, the adsorbed PFOA undergoes electrochemically oxidation and hydrolysis to produce shorter-chain perfluorocarboxylic acids with less CF2 unit. The efficient electro-oxidation of PFOA by CNT sponge anode is due to the combined effect of adsorption and electrochemical oxidation. These findings provide an efficient method to remove actual concentration PFOA from water. (C) 2015 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [91434132, 51378020, 21077001]; National Five-Year Technology Support Program [2011BAJ07B04]; Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-10-0208]; Collaborative Innovation Center for Regional Environmental Quality; SCI(E); EI; PubMed; ARTICLE; zhaohuazhang@pku.edu.cn; 120-126; 141
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/415252]
专题	环境科学与工程学院工学院
推荐引用方式 GB/T 7714	Xue, An,Yuan, Zi-Wen,Sun, Yan,et al. Electro-oxidation of perfluorooctanoic acid by carbon nanotube sponge anode and the mechanism[J]. CHEMOSPHERE,2015.
APA	Xue, An,Yuan, Zi-Wen,Sun, Yan,Cao, An-Yuan,&Zhao, Hua-Zhang.(2015).Electro-oxidation of perfluorooctanoic acid by carbon nanotube sponge anode and the mechanism.CHEMOSPHERE.
MLA	Xue, An,et al."Electro-oxidation of perfluorooctanoic acid by carbon nanotube sponge anode and the mechanism".CHEMOSPHERE (2015).