Characterisation of PFASs and Organofluorine in Freshwater Environments: Transfer from water to land via emergent aquatic insects

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Characterisation of PFASs and Organofluorine in Freshwater Environments : Transfer from water to land via emergent aquatic insects

Koch, Alina, 1990- (author): Örebro universitet,Institutionen för naturvetenskap och teknik

Wang, Thanh, docent, 1979- (thesis advisor): Örebro universitet,Institutionen för naturvetenskap och teknik

Jonsson, Micael, docent (thesis advisor): Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden

Yeung, Leo W. Y., docent, 1981- (thesis advisor): Örebro universitet,Institutionen för naturvetenskap och teknik

Kärrman, Anna, docent, 1975- (thesis advisor): Örebro universitet,Institutionen för naturvetenskap och teknik

Ahrens, Lutz, docent (thesis advisor): Section for Organic Environmental Chemistry and Ecotoxicology, Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden

Martin, Jonathan, professor (opponent): Department of Environmental Science, Stockholm University

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(creator_code:org_t)

ISBN 9789175293486
Örebro : Örebro University, 2020
English 69 s.
Series: Örebro Studies in Chemistry, 1651-4270 ; 25

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Doctoral thesis (other academic/artistic)

Abstract Subject headings

Per- and polyfluoroalkyl substances (PFASs) are anthropogenic contaminants of emerging concern, because many are highly persistent to degradation and have been linked to adverse effects in humans as well as their ubiquitous spread in aquatic environments. This thesis investigated distribution of PFASs and organofluorine in freshwater environments impacted by PFAS point sources. The main focus was to study potential transfer of PFASs from freshwater systems to riparian zones via emergent aquatic insects as well as potential impacts on riparian invertebrate consumers.Comprehensive sets of samples, such as aquatic insect larvae, emergent aquatic insects, terrestrial invertebrate consumers and water were collected from mainly two sites in Sweden, Ronneby Airport and Kvarntorp industrial area. Homologue and branched isomer profiles, estimates of mass discharges, bioaccumulation factors, stable isotope analysis of carbon and nitrogen as well as organofluorine mass balance and suspect screening analysis were used to characterize the distribution of PFASs in these freshwater environments including their aquatic and terrestrial invertebrate food webs.Results revealed elevated PFAS concentrations in emergent aquatic insects and riparian invertebrate consumers, especially in spiders. Calculated biodriven transfers indicated that impact on riparian insectivores could be substantial on a local and seasonal scale. Furthermore, PFAS concentrations in terrestrial consumers were related to aquatic-based diet and trophic levels, indicating that biomagnification was a major pathway of uptake for some PFASs. Organofluorine mass balance could be closed for most aquatic and for some terrestrial invertebrates from the Ronneby site by target PFAS analysis, whereas a fraction of ~50% in surface water was unidentified organofluorine. Most new PFASs, tentatively identified by suspect screening, were found in water samples and given that contamination occurred decades ago suggested that those PFASs, mainly perfluoroalkyl sulfonamide-based PFASs, are highly water soluble and persistent.

Subject headings

NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)

Keyword

PFASs
riparian zone
emergent aquatic insects
terrestrial consumers
stable isotopes
organofluorine mass balance
AFFF
point sources

Publication and Content Type

vet (subject category)
dok (subject category)

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