| Summary: | After their discovery in the environment in the early 2000s, polyfluorinated alkylated substances and perfluorinated alkylated substances (PFASs) received much attention because of their persistence, bioaccumulation potential, and possible adverse effects in organisms. Concentrations have been monitored in the biotic and abiotic environment. Due to atmospheric and oceanic transport PFAS have been unambiguously distributed in the environment, also in the Arctic. Linnévatnet is a remote lake located on the west coast of Nordenskíold land, Spitsbergen, Svalbard. The aim of this thesis is to determine the levels of selected PFASs in the sediment of Linnévannet with an emphasis on the short chained compounds, and examine some possible point source locations on Svalbard. To examine this, a modified method meant for biota was used. An aim will be to se how the method performs, and if it is suitable for sediment analysis. The sampling was carried out at Linnévatnet in June of 2015. Samples where taken with a grab sampler from a rubber boat or from the ice. The samples where transported to the field station and stored in a freezer until transport back to UNIS. At UNIS the samples where dried and packed, then sent to NMBU where the rest of the extraction and clean up were carried out. The extracts where analyzed at campus Adamsstuen, at the Institute for Food Safety and Infection Biology (MatInf, NMBU). The recoveries where found to be to low, giving the results a significant uncertainty. The results where comparable with other studies conducted at similar sites in the Canadian Arctic. PFCAs and PFOS where found in Linnévatnet at low concentrations. The airport where identified as a possible local source, where high levels of PFSAs and PFCAs where found, suggesting fire fighting foam as a possible source from the associated fire training site. Etter at de ble oppdaget i miljøet tidlig på 2000_tallet har perfluoroalkyl og polyfluoroalkyl forbindelser fått mye vitenskapelig oppmerksomhet. De har blitt vist og være lite ...
|
|---|