Neutral Poly-/perfluoroalkyl Substances in Air and Snow from the Arctic
نویسندگان
چکیده
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.
منابع مشابه
Polyfluorinated compounds in the atmosphere along a cruise pathway from the Japan Sea to the Arctic Ocean.
Neutral polyfluorinated alkyl substances (PFASs) were measured in high-volume air samples collected on board the research vessel Snow Dragon during the 4th Chinese National Arctic Expedition from the Japan Sea to the Arctic Ocean in 2010. Four volatile and semi-volatile PFASs (fluorotelomer alcohols (FTOHs), fluorotelomer acids (FTAs), perfluoroalkyl sulfonamides (FASAs), and sulfonamidoethanol...
متن کاملRole of wastewater treatment plant in environmental cycling of poly- and perfluoroalkyl substances
The role of wastewater treatment plants (WWTP) in environmental cycling of polyand perfluoroalkyl substances (PFASs) through aqueous effluent, sludge and air emission has been critically reviewed here. Understanding the role of WWTPs can provide better understanding of global cycling of persistent PFASs and assist in formulating relevant environmental policies. The review suggests that WWTP eff...
متن کاملPerfluoroalkyl contaminants in an Arctic marine food web: trophic magnification and wildlife exposure.
To better understand the bioaccumulation behavior of perfluoroalkyl contaminants (PFCs), we conducted a comparative analysis of PFCs and lipophilic organohalogens in a Canadian Arctic marine food web. Concentrations of perfluorooctane sulfonic acid (PFOS), perfluorooctansulfoamide (PFOSA), and C7-C14 perfluorocarboxylic acids (PFCAs) ranged between 0.01 and 0.1 ng x g(-1) dry wt in sediments an...
متن کاملAuthor’s response to reviews Title: Can Profiles of Poly- and Perfluoroalkyl Substances (PFASs) in Human Serum Provide Information on Major Exposure Sources? Authors:
Title: Can Profiles of Polyand Perfluoroalkyl Substances (PFASs) in Human Serum Provide Information on Major Exposure Sources? Authors: Xindi Hu ([email protected]) Clifton Dassuncao ([email protected]) Xianming Zhang ([email protected]) Philippe Grandjean ([email protected]) Pál Weihe ([email protected]) Glenys Webster ([email protected]) Flemming Nielsen ([email protected]....
متن کاملKu-band radar penetration into snow cover on Arctic sea ice using airborne data
Satellite radar altimetry provides data to monitor winter Arctic sea-ice thickness variability on interannual, basin-wide scales. When using this technique an assumption is made that the peak of the radar return originates from the snow/ice interface. This has been shown to be true in the laboratory for cold, dry snow as is the case on Arctic sea ice during winter. However, this assumption has ...
متن کامل