Poly- and perfluoroalkylated substances (PFASs) in water, sediment and fish muscle tissue from Lake Tana, Ethiopia and implications for human exposure

Sammanfattning

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.

Nyckelord

Per- and polyfluoroalkyl substances (PFASs); Perfluorooctane sulfonate (PFOS); Spatial distribution; Human risk; Bioconcentration factors (BCF); Sediment/water partition coefficient (K-d)

Publicerad i

Chemosphere
2016, volym: 165, sidor: 352-357
Utgivare: PERGAMON-ELSEVIER SCIENCE LTD

SLU författare

• Ahrens, Lutz

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    

• Sjöholm, Margareta

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    

• Gebrehiwot, Solomon

  • Addis Ababa University

• Bishop, Kevin

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    
  • Uppsala universitet

• Åkerblom, Staffan

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    

Associerade SLU-program

Giftfri miljö
Sjöar och vattendrag

Globala målen (SDG)

SDG3 God hälsa och välbefinnande
SDG6 Rent vatten och sanitet för alla
SDG14 Hav och marina resurser

UKÄ forskningsämne

Miljövetenskap
Miljöteknik och miljöledning
Annan biologi

Publikationens identifierare

• DOI: https://doi.org/10.1016/j.chemosphere.2016.09.007

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/81230