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PFOS i Igelbäcken: kartläggning av potentiella föroreningskällor och förslag till vidare provtagning och åtgärder
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
PFOS in Igelbäcken : mapping of potential sources and suggestions for further sampling and corrective actions (English)
Abstract [sv]

Perfluoroktansulfonsyra och dess derivat (PFOS) har hittats i ökande halter i miljön sedan det började produceras under 40-talet. Syftet med denna studie var att studera PFOS-halten i Igelbäcken i Stockholmsområdet genom att samla in och sammanställa tidigare provdata och att kartlägga föroreningskällor i avrinningsområdet. Halterna befanns vara mycket höga. Den högsta uppmätta halten var 120 ng/l och under perioden 2016-2019 var medelhalten i Slottsallén, i närheten av utloppet, 60 gånger högre än MKN (0,65 ng/l) för inlandsytvatten. Halterna ökar framförallt kring brandövningsplatsen vid Barkarby flygfält, men är fortsatt höga därefter, vilket tyder på att ytterligare källor finns längre nedströms. Ökande vattenstånd och -flöde ger ökad spridning i PFOS-halt. Det finns en positiv, måttlig korrelation mellan vattenstånd och PFOS-halt, vilket skulle kunna bero på högre utlakning. Hela bäckens sträckning bör provtas under samma period för att ge en klarare bild av hur spridningen ser ut.

Abstract [en]

Perfluorooctane sulfonic acid and its derivatives (PFOS) have been found in increasing levels in the environment since the 40's when it was first produced. The objective of this study was to study PFOS in Igelbäcken in the Stockholm area by compiling previous sampled data and to map pollution sources in the catchment area. The PFOS concentrations were found to be very high. The highest level measured was 120 ng/l and during the period 2016-2019 the mean level in Slottsallén, in the vicinity of the outlet, was 60 times higher than EQS (0.65 ng/l) for inland surface water. The concentrations increases especially around the fire drillsite at Barkarby airfield, but are continuously high thereafter, which indicates additional sources further downstream. Increasing water level and water flow increases the spread in PFOS concentration. There is a positive, moderate correlation between water level and PFOS concentration, which could be due to greater leaching. The entire stretch of the stream should be sampled during the same period to allow a clearer picture of the PFOS distribution.

Place, publisher, year, edition, pages
2019. , p. 20
Keywords [sv]
PFOS, perfluoroktansulfonsyra, Igelbäcken, vattendrag, föroreningskällor
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-85628OAI: oai:DiVA.org:lnu-85628DiVA, id: diva2:1332846
External cooperation
Solna stad
Subject / course
Environmental Science
Educational program
Environmental Analysis Programme, 180 credits
Supervisors
Examiners
Available from: 2019-07-01 Created: 2019-06-28 Last updated: 2019-07-01Bibliographically approved

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CiteExportLink to record
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