Neutral Poly-/perfluoroalkyl Substances in Air and Snow from the Arctic

Levels of neutral poly-/perfluoroalkyl substances (nPFASs) in air and snow collected from Ny-Ålesund were measured and their air-snow exchange was determined to investigate whether they could re-volatilize into the atmosphere driven by means of air-snow exchange. The total concentration of 12 neutra...

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Bibliographic Details
Published in:Scientific reports 2015-03, Vol.5 (1), p.8912-8912, Article 8912
Main Authors: Xie, Zhiyong, Wang, Zhen, Mi, Wenying, Möller, Axel, Wolschke, Hendrik, Ebinghaus, Ralf
Format: Article
Language:English
Subjects:
140/58
704/106/694
704/172
704/172/169
Coasts
Humanities and Social Sciences
multidisciplinary
Perfluorochemicals
Science
Snow
Vapor pressure
Volatility
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Summary:Levels of neutral poly-/perfluoroalkyl substances (nPFASs) in air and snow collected from Ny-Ålesund were measured and their air-snow exchange was determined to investigate whether they could re-volatilize into the atmosphere driven by means of air-snow exchange. The total concentration of 12 neutral PFASs ranged from 6.7 to 39 pg m −3 in air and from 330 to 690 pg L −1 in snow. A significant log-linear relationship was observed between the gas/particle partition coefficient and vapor pressure of the neutral PFASs. For fluorotelomer alcohol (FTOHs) and fluorotelomer acrylates (FTAs), the air-snow exchange fluxes were positive, indicating net evaporative from snow into air, while net deposition into snow was observed for perfluorooctane sulfonamidoethanols (Me/EtFOSEs) in winter and spring of 2012. The air-snow exchange was snow-phase controlled for FTOHs and FTAs and controlled by the air-phase for FOSEs. Air-snow exchange may significantly interfere with atmospheric concentrations of neutral PFASs in the Arctic.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep08912