11/12/2022 0 Comments Air creative collection 11.1![]() The contamination of various environmental media with PFAAs has been observed even in remote regions, such as the Arctic 5, 6. Poly-/perfluoroalkyl substances (PFASs), including neutral PFASs and perfluoroalkyl acids (PFAAs), have been widely produced in increasing quantities for several decades and are raising concern because of their environmental persistence, bioaccumulative potential and their possible adverse effects on humans and wildlife 1, 2, 3, 4. Air-snow exchange may significantly interfere with atmospheric concentrations of neutral PFASs in the Arctic. The air-snow exchange was snow-phase controlled for FTOHs and FTAs and controlled by the air-phase for FOSEs. 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. A significant log-linear relationship was observed between the gas/particle partition coefficient and vapor pressure of the neutral PFASs. 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. 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. ![]()
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