Ahrens, Lutz
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences
Research article2016Peer reviewed
Ahrens, Lutz; Gashaw, Habiba; Sjöholm, Margareta; Gebrehiwot, Solomon; Getahun, Abebe; Derbe, Ermias; Bishop, Kevin; Åkerblom, Staffan
Lake Tana is Ethiopia's largest lake and there are plans to increase the harvest of fish from the lake. The objective of this study was to assess the levels of poly- and perfluoroalkyl substances (PFASs) in different compartments of the lake (water, sediment, and fish muscle tissue), and its implications for human exposure. The results showed higher PFAS concentrations in piscivorous fish species (Labeobarbus mega-stoma and Labeobarbus gorguari) than non-piscivorous species (Labeobarbus intermedius, Oreochromis niloticus and Clarias gariepinus) and also spatial distribution similarities. The Sigma PFAS concentrations ranged from 0.073 to 5.6 ng L-1 (on average, 2.9 ng L-1) in surface water, 0.22-0.55 ng g(-1) dry weight (dw) (on average, 0.30 ng g(-1) dw) in surface sediment, and non-detected to 5.8 ng g(-1) wet weight (ww) (on average, 1.2 ng g(-1) ww) in all fish species. The relative risk (RR) indicates that the consumption of fish contaminated with perfiuorooctane sulfonate (PFOS) will likely not cause any harmful effects for the Ethiopian fish eating population. However, mixture toxicity of the sum of PFASs, individual fish consumption patterns and increasing fish consumption are important factors to consider in future risk assessments. (C) 2016 Elsevier Ltd. All rights reserved.
Per- and polyfluoroalkyl substances (PFASs); Perfluorooctane sulfonate (PFOS); Spatial distribution; Human risk; Bioconcentration factors (BCF); Sediment/water partition coefficient (K-d)
Chemosphere
2016, volume: 165, pages: 352-357
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Non-toxic environment
Lakes and watercourses
SDG3 Good health and well-being
SDG6 Clean water and sanitation
SDG14 Life below water
Environmental Sciences
Environmental Management
Other Biological Topics
https://res.slu.se/id/publ/81230