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dc.contributor.author
Chaplin, Joshua D.
dc.contributor.author
Christl, Marcus
dc.contributor.author
Cundy, Andrew B.
dc.contributor.author
Warwick, Phillip E.
dc.contributor.author
Gaca, Pawel
dc.contributor.author
Bochud, François
dc.contributor.author
Froidevaux, Pascal
dc.date.accessioned
2022-10-24T10:09:21Z
dc.date.available
2022-09-23T03:03:37Z
dc.date.available
2022-09-26T12:46:51Z
dc.date.available
2022-10-12T11:05:13Z
dc.date.available
2022-10-24T10:09:21Z
dc.date.issued
2022-10-14
dc.identifier.issn
2690-0637
dc.identifier.other
10.1021/acsestwater.2c00194
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/572441
dc.identifier.doi
10.3929/ethz-b-000572441
dc.description.abstract
Actinides accumulate within aquatic biota in concentrations several orders of magnitude higher than in the seawater [the concentration factor (CF)], presenting an elevated radiological and biotoxicological risk to human consumers. CFs currently vary widely for the same radionuclide and species, which limits the accuracy of the modeled radiation dose to the public through seafood consumption. We propose that CFs will show less dispersion if calculated using a time-integrated measure of the labile (bioavailable) fraction instead of a specific spot sample of bulk water. Herein, we assess recently developed configurations of the diffusive gradients in thin films (DGT) sampling technique to provide a more accurate predictor for the bioaccumulation of uranium, plutonium, and americium within the biota of the Sellafield-impacted Esk Estuary (UK). We complement DGT data with the cross-flow ultrafiltration of bulk seawater to assess the DGT-labile fraction versus the bulk concentration. Sequential elution of Fucus vesiculosis reveals preferential internalization and strong intracellular binding of less particle-reactive uranium. We find significant variations between CF values in biota calculated using a spot sample versus using DGT, which suggest an underestimation of the CF by spot sampling in some cases. We therefore recommend a revision of CF values using time-integrated bioavailability proxies.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
plutonium
en_US
dc.subject
uranium
en_US
dc.subject
americium
en_US
dc.subject
diffusive gradients in thin films
en_US
dc.subject
DGT
en_US
dc.subject
bioaccumulation
en_US
dc.subject
concentration factor
en_US
dc.subject
radiation dose modeling
en_US
dc.subject
sellafield
en_US
dc.title
Time-Integrated Bioavailability Proxy for Actinides in a Contaminated Estuary
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2022-09-01
ethz.journal.title
ACS ES&T Water
ethz.journal.volume
2
en_US
ethz.journal.issue
10
en_US
ethz.journal.abbreviated
ACS EST Water
ethz.pages.start
1688
en_US
ethz.pages.end
1696
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::08619 - Labor für Ionenstrahlphysik (LIP) / Laboratory of Ion Beam Physics (LIP)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::08619 - Labor für Ionenstrahlphysik (LIP) / Laboratory of Ion Beam Physics (LIP)
ethz.date.deposited
2022-09-23T03:03:41Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2022-10-24T10:09:22Z
ethz.rosetta.lastUpdated
2023-02-07T07:18:40Z
ethz.rosetta.versionExported
true
ethz.COinS
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