title: Presence and partitioning behavior of polyfluorinated iodine alkanes in environmental matrices around a fluorochemical manufacturing plant: another possible source for perfluorinated carboxylic acids?
abstract: The indistinct origins of some ubiquitous perfluorinated alkyl acids have attracted great attention in recent decades. In this present work, even-chained polyfluorinated iodides (PFIs), a group of volatile perfluorinated compounds (PFCs), including four perfluorinated iodine alkanes (FIAs) and three polyfluorinated telomer iodides (FTIs) were confirmed to be present in the environment. A wide concentration range was found for FIAs at 1.41 to 3.08x10(4) pg/L, and for FTIs at 1.39 to 1.32x10(3) pg/L in the ambient air collected around a fluorochemical manufacturing plant in Shandong province, northern China. Whereas for surface soils, most of these PFIs were below detection limits and only small amounts of analytes with higher carbon chain (such as perfluorododecyl iodide and 1H,1H,2H,2H-perfluorodecyl iodide, 16.6-499 pg/g) could be sporadically detected. The presence of the PFIs in different environmental matrices in the investigated area and calculated vapor pressures (0.095-20.4 Torr) verify that they can be considered as volatile organic chemicals and easily be released into the atmosphere. Together with reported degradation ability and long-range transport potential, the identification of these PFIs indicates that unintentional release during the telomer reaction process might also be another route for the formation and distribution of certain polyfluorinated alcohols, aldehydes, and carboxylic acid derivatives under oxidative conditions in the environment.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085.
authors.forename: Ting
authors.initials: T
authors.lastname: Ruan
authors.forename: Yawei
authors.initials: Y
authors.lastname: Wang
authors.forename: Thanh
authors.initials: T
authors.lastname: Wang
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Ding
authors.forename: Jiyan
authors.initials: J
authors.lastname: Liu
authors.forename: Chang
authors.initials: C
authors.lastname: Wang
authors.forename: Guangbo
authors.initials: G
authors.lastname: Qu
authors.forename: Guibin
authors.initials: G
authors.lastname: Jiang
mesh_terms: D000473:Alkanes / Q000032:analysis* / Q000737:chemistry; D002264:Carboxylic Acids / Q000032:analysis* / Q000737:chemistry; D002617:Chemical Industry; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis* / Q000737:chemistry; D005466:Fluorocarbons / Q000032:analysis* / Q000737:chemistry; D017613:Iodine Compounds / Q000032:analysis* / Q000737:chemistry
chemical_list: D000473:Alkanes; D002264:Carboxylic Acids; D004785:Environmental Pollutants; D005466:Fluorocarbons; D017613:Iodine Compounds