Presence and Partitioning Behavior of Polyfluorinated Iodine Alkanes in Environmental Matrices around a Fluorochemical Manufacturing Plant: Another Possible Source for Perfluorinated Carboxylic Acids?

详细信息    查看全文

• 作者：Ting Ruan ; Yawei Wang ; Thanh Wang ; Qinghua Zhang ; Lei Ding ; Jiyan Liu ; Chang Wang ; Guangbo Qu ; Guibin Jiang
• 刊名：Environmental Science & Technology
• 出版年：2010
• 出版时间：August 1, 2010
• 年：2010
• 卷：44
• 期：15
• 页码：5755-5761
• 全文大小：247K
• 年卷期：v.44,no.15(August 1, 2010)
• ISSN：1520-5851

文摘

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 3.08 × 10⁴ pg/L, and for FTIs at 1.39 to 1.32 × 10³ 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.