Background 210 Po activity concentrations in Greenland marine biota and dose assessment.

Autor: Hansen V; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark. Electronic address: viha@bios.au.dk., Mosbech A; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Rigét FF; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark; Greenland Institute for Natural Resources, Kivioq 2, GL-3900 Nuuk, Greenland., Søgaard-Hansen J; Danish Decommissioning, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Bjerregaard P; National Institute of Public Health, University of Southern Denmark, Studiestræde 6, 1455 København K, Denmark., Dietz R; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Sonne C; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Asmund G; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Bøknæs N; Royal Greenland A/S, Hellebarden 7, DK-9230 Svenstrup J, Denmark., Olsen M; Greenland Institute for Natural Resources, Kivioq 2, GL-3900 Nuuk, Greenland., Gustavson K; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Boertmann D; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Fabricius SD; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Clausen DS; Department of Ecoscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark., Hansen AS; Non-affiliated scientist, Denmark.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2022 Feb 01; Vol. 806 (Pt 1), pp. 150508. Date of Electronic Publication: 2021 Sep 23.
DOI: 10.1016/j.scitotenv.2021.150508
Abstrakt: Polonium-210 ( 210 Po) is a radionuclide sentinel as it bioaccumulates in marine organisms, thereby being the main contributor to committed dietary doses in seafood consumers. Although seafood and marine mammals are an important part of the traditional Inuit diet, there is a general lack of information on the 210 Po concentrations in the Greenlandic marine food chain leading to the human consumer. Here, we determine background 210 Po concentrations in edible parts of different marine organisms from Greenland and provide a dose assessment. Blue mussels (Mytilus edulis), organs of ringed seal (Pusa hispida) and polar bear (Ursus maritimus) displayed significantly elevated 210 Po concentrations in respect to all other studied organisms (p < 0.001). 210 Po concentrations ranged from 0.02 Bq kg -1 , w.w. in Greenland halibut (Reinhardtius hippoglossoides) muscle to 78 Bq kg -1 , w.w. and 202 Bq kg -1 , w.w. in ringed seal muscle and kidneys, respectively. 210 Po concentration ratio for edible parts increases in the order bladderwrack (Fucus Vesiculosus), northern shrimp (Pandalus borealis), blue mussels, and from fish species to ringed seal and polar bear. 210 Po distribution in fish, ringed seal, and polar bear follows a general pattern, the lowest concentrations were in muscle, and the highest concentrations were in the organs involved in metabolism. The derived 210 Po annual absorbed dose in edible parts of studied marine organisms are several orders of magnitude lower than the recommended dose rate screening value of 10 μGy h -1 . Effective doses from intake of 210 Po to Greenland average children (1.4 mSv y -1 ), and high seafood and marine mammal consumers (2 mSv y -1 for adults and 3.6 mSv y -1 for children) are higher than the world average annual effective dose due to ingestion of naturally occurring radionuclides.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE