Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境纳米材料实验室

	Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light
	Wang, Yuan ; Zhang, Pengyi ; Pan, Gang ; Chen, Hao
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2008-12-15
卷号	160 期号:1 页码:181-186
关键词	Perfluorooctanoic acid Photochemical decomposition Ferric ion 254 nm UV light Persistent organic pollutants (POPs)
英文摘要	The great enhancement of ferric ion on the photochemical decomposition of environmentally persistent perfluorooctanoic acid (PFOA) under 254 nm UV light was reported. In the presence of 10 mu M ferric ion, 47.3% of initial PFOA (48 mu M) was decomposed and the defluorination ratio reached 15.4% within 4 h reaction time. While the degradation and defluorination ratio greatly increased to 80.2% and 47.8%, respectively,when ferric ion concentration increased to 80 mu M, and the corresponding half-life was shortened to 103 min. Though the decomposition rate was significantly lowered under nitrogen atmosphere, PFOA was efficiently decomposed too. Other metal ions like Cu(2+) and Zn(2+) also slightly improved the photochemical decomposition of PFOA under irradiation of 254nm UV light. Besides fluoride ion, other intermediates during PFOA decomposition including formic acid and five shorter-chain perfluorinated carboxylic acids (PFCAs) with C7, C6, C5, C4 and C3. respectively, were identified and quantified by ICor LC/MS. The mixture of PFOA and ferric ion had strong absorption around 280nm. It is proposed that PFOA coordinates with ferric ion to form a complex, and its excitation by 254 nm UV light leads to the decomposition of PFOA in a stepwise way. (C) 2008 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000261255100026
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/22014]
专题	生态环境研究中心_环境纳米材料实验室
推荐引用方式 GB/T 7714	Wang, Yuan,Zhang, Pengyi,Pan, Gang,et al. Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light[J]. JOURNAL OF HAZARDOUS MATERIALS,2008,160(1):181-186.
APA	Wang, Yuan,Zhang, Pengyi,Pan, Gang,&Chen, Hao.(2008).Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light.JOURNAL OF HAZARDOUS MATERIALS,160(1),181-186.
MLA	Wang, Yuan,et al."Ferric ion mediated photochemical decomposition of perfluorooctanoic acid (PFOA) by 254 nm UV light".JOURNAL OF HAZARDOUS MATERIALS 160.1(2008):181-186.