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Bonnet, Björn, 2017. Mass flow and fate of per- and polyfluoroalkyl substances in a landfill in Uppsala, Sweden. Second cycle, A2E. Uppsala: SLU, Dept. of Aquatic Sciences and Assessment

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Abstract

In this study, a landfill has been investigated in terms of the distribution of per- and polyfluoroalkyl substances and the environmental fate. 28 PFASs (13 PFCAs, 4 PFSAs, 3 FOSAs, 2 FOSEs, 3 FOSAAs and 3 FTSAs) have been analysed in 14 leachate, 11 groundwater and 9 sludge samples. Furthermore, 11 samples have been taken in the on-site sewage treatment plant (STP) as well as 12 samples along the receiving water course (total of 57 samples). Sum PFAS concentration in the leachate ranged between 59 ng L−1 and 1500 ng L−1, in groundwater between 8.5 and 1800 ng L−1 and in the sludge between 33 and 438 ng L−1. The composition in the leachate (52%) and the groundwater (60%) was dominated by PFCAs. C3−C7 accounted for 98% sum PFCAs in the leachate and 99% sum PFCAs in the groundwater. Sludge samples ranged from 33 ng L−1 to 440 ng L−1 and were dominated by precursor compounds (FTSAs 37%, PFSAs 33% and PFCAs 7.6% sum PFASs). Long chain PFCAs (C8−C14,C16) showed detection frequencies of 100% (4.8% sum PFASs (C18 included)). PFOS was most abundant in the sludge (30% sum PFASs, 91% sum PFSAs). The STP showed a sum PFASs removal efficiency of 47%, showing highest efficiency for long-chain compounds (88% PFNA, 100% PFDA, 90% PFOS linear and 84% PFOS branched) and precursors (100% for 8:2 FTSA, Me-FOSAA, Et-FOSAA). The total mass flow of PFASs exiting the landfill was estimated with 220 mg g−1. The mass flow in the river showed no long-range effect (30 km) of the landfill concerning the PFASs contamination of surface waters. Conclusively it seems likely that PFASs from the landfill are rather threatening the local groundwater.

Main title:Mass flow and fate of per- and polyfluoroalkyl substances in a landfill in Uppsala, Sweden
Authors:Bonnet, Björn
Supervisor:Ahrens, Lutz and Hansen, Hans Christian Bruun
Examiner:Wiberg, Karin
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2017
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:NM025 EnvEuro - European Master in Environmental Science 120 HEC
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Keywords:PFASs, landfill, groundwater, sludge, STP, mass flow
URN:NBN:urn:nbn:se:slu:epsilon-s-9179
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-9179
Subjects:Water resources and management
Pollution
Language:English
Deposited On:09 Jan 2018 09:55
Metadata Last Modified:09 Jan 2018 09:55

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