Neutral poly-/perfluoroalkyl substances in air and snow from the Arctic.

Abstract:

: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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Xie Z,Wang Z,Mi W,Möller A,Wolschke H,Ebinghaus R

doi

10.1038/srep08912

subject

Has Abstract

pub_date

2015-03-09 00:00:00

pages

8912

issn

2045-2322

pii

srep08912

journal_volume

5

pub_type

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