Phototransformation of perfluorooctane sulfonamide on natural clay minerals: A likely source of short chain perfluorocarboxylic acids

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Phototransformation of perfluorooctane sulfonamide on natural clay minerals: A likely source of short chain perfluorocarboxylic acids
	Lv, Kun; Gao, Wei; Meng, Lingyi; Xue, Qiao; Tian, Haoting; Wang, Yawei; Jiang, Guibin
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020-06-15
卷号	392 页码:1-9
关键词	FOSA Montmorillonite Sunlight Environmental fate Interfacial reaction
ISSN号	0304-3894
英文摘要	In this study, a new phototransformation pathway for perfluorooctane sulfonamide (FOSA) and underlying degradation mechanisms are described. Phototransformation of FOSA in a natural clay mineral (montmorillonite) suspension was compared to that in an aqueous solution. Results showed that the presence of montmorillonite can significantly promote the transformation of FOSA to perfiuocarboxylic acids (increasing rate). The phototransformation reaction was found to be initiated by the activation of adsorbed oxygen molecules on the surface of montmorillonite, which generate superoxide anion and hydroxyl radicals. Hydroxyl radicals can then attack FOSA adsorbed onto the surface of montmorillonite, promoting the transformation process. In this reaction, clay minerals played a dual role: providing hydroxyl radicals and concentrating FOSA on their surfaces. This helped to promote the contact and reaction between FOSA and hydroxyl radicals. This study provides the first evidence that heterogeneous oxidation of FOSA at the surface of natural clay minerals may act as an important source of perfluocarboxylic acids (PFCAs), especially short chain PFCAs (i.e. trifluoroacetic acid, TFA).
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44776]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Lv, Kun,Gao, Wei,Meng, Lingyi,et al. Phototransformation of perfluorooctane sulfonamide on natural clay minerals: A likely source of short chain perfluorocarboxylic acids[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,392:1-9.
APA	Lv, Kun.,Gao, Wei.,Meng, Lingyi.,Xue, Qiao.,Tian, Haoting.,...&Jiang, Guibin.(2020).Phototransformation of perfluorooctane sulfonamide on natural clay minerals: A likely source of short chain perfluorocarboxylic acids.JOURNAL OF HAZARDOUS MATERIALS,392,1-9.
MLA	Lv, Kun,et al."Phototransformation of perfluorooctane sulfonamide on natural clay minerals: A likely source of short chain perfluorocarboxylic acids".JOURNAL OF HAZARDOUS MATERIALS 392(2020):1-9.