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Novel DGT Configurations for the Assessment of Bioavailable Plutonium, Americium, and Uranium in Marine and Freshwater Environments

Novel DGT Configurations for the Assessment of Bioavailable Plutonium, Americium, and Uranium in Marine and Freshwater Environments
Novel DGT Configurations for the Assessment of Bioavailable Plutonium, Americium, and Uranium in Marine and Freshwater Environments

Plutonium, americium, and uranium contribute to the radioactive contamination of the environment and are risk factors for elevated radiation exposure via ingestion through food or water. Due to the significant environmental inventory of these radioelements, a sampling method to accurately monitor their bioavailable concentrations in natural waters is necessary, especially since physicochemical factors can cause significant temporal fluctuations in their waterborne concentrations. To this end, we engineered novel diffusive gradients in thin-film (DGT) configurations using resin gels, which are selective for UO22+, Pu(IV + V), and Am(III) among an excess of extraneous cations. In this work, we also report an improved synthesis of our in-house ion-imprinted polymer resin, which we used to manufacture a resin gel to capture Am(III). The effective diffusion coefficients of Pu, Am, and U in agarose cross-linked polyacrylamide were determined in freshwater and seawater simulants and in natural seawater, to calibrate these configurations for environmental deployments.

0003-2700
Chaplin, Joshua D.
2623b2e6-0c41-4252-ba6c-aa368d72ad28
Warwick, Phillip E
f2675d83-eee2-40c5-b53d-fbe437f401ef
Cundy, Andrew B
994fdc96-2dce-40f4-b74b-dc638286eb08
Bochud, François
eaec472c-9935-4338-a3c1-aba4038776e4
Froidevaux, Pascal
0de4e2c6-9158-43dc-9f6e-66dbf27e6641
Chaplin, Joshua D.
2623b2e6-0c41-4252-ba6c-aa368d72ad28
Warwick, Phillip E
f2675d83-eee2-40c5-b53d-fbe437f401ef
Cundy, Andrew B
994fdc96-2dce-40f4-b74b-dc638286eb08
Bochud, François
eaec472c-9935-4338-a3c1-aba4038776e4
Froidevaux, Pascal
0de4e2c6-9158-43dc-9f6e-66dbf27e6641

Chaplin, Joshua D., Warwick, Phillip E, Cundy, Andrew B, Bochud, François and Froidevaux, Pascal (2021) Novel DGT Configurations for the Assessment of Bioavailable Plutonium, Americium, and Uranium in Marine and Freshwater Environments. Analytical Chemistry. (doi:10.1021/acs.analchem.1c01342).

Record type: Article

Abstract

Plutonium, americium, and uranium contribute to the radioactive contamination of the environment and are risk factors for elevated radiation exposure via ingestion through food or water. Due to the significant environmental inventory of these radioelements, a sampling method to accurately monitor their bioavailable concentrations in natural waters is necessary, especially since physicochemical factors can cause significant temporal fluctuations in their waterborne concentrations. To this end, we engineered novel diffusive gradients in thin-film (DGT) configurations using resin gels, which are selective for UO22+, Pu(IV + V), and Am(III) among an excess of extraneous cations. In this work, we also report an improved synthesis of our in-house ion-imprinted polymer resin, which we used to manufacture a resin gel to capture Am(III). The effective diffusion coefficients of Pu, Am, and U in agarose cross-linked polyacrylamide were determined in freshwater and seawater simulants and in natural seawater, to calibrate these configurations for environmental deployments.

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More information

e-pub ahead of print date: 25 August 2021

Identifiers

Local EPrints ID: 451185
URI: http://eprints.soton.ac.uk/id/eprint/451185
ISSN: 0003-2700
PURE UUID: 5604215f-9e87-4a7c-9f64-6d2508d24659
ORCID for Andrew B Cundy: ORCID iD orcid.org/0000-0003-4368-2569

Catalogue record

Date deposited: 14 Sep 2021 16:08
Last modified: 22 Sep 2021 01:45

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Contributors

Author: Joshua D. Chaplin
Author: Andrew B Cundy ORCID iD
Author: François Bochud
Author: Pascal Froidevaux

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