Publications

First dataset of <sup>236</sup>U and <sup>233</sup>U around the Greenland coast

Author(s)
Jixin Qiao, Karin Hain, Peter Steier
Abstract

We report the first combined dataset of 236U and 233U in the Greenland marine environment during the period of 2012–2016. Results are discussed in terms of time evolution and spatial distribution of 236U concentration, and atomic ratios of 236U/238U and 233U/236U. 236U concentrations along the Greenland coast are distributed within a relatively narrow range of (0.7–12.9) × 107 atom/L, corresponding to 236U/238U atomic ratios of (1.1–15.5) × 10−9. The 233U/236U atomic ratios obtained vary from 0.12 × 10−2 to 1.16 × 10−2, with the majority distributed in the range of (0.2–0.7) × 10−2. We applied 233U/236U and 236U/238U atomic ratios in a binary mixing model to identify possible 236U source terms. The results indicate that anthropogenic 236U and 233U in Greenland surface seawater originated from the direct global fallout (DGF) and the Sellafield and La Hague reprocessing plants (RP) is diluted by a third endmember, mostly likely natural ocean water (NOW), containing marginal 236U and 233U. A preliminary estimation of the source terms of 236U using 233U/236U atomic ratios indicate that, for both eastern and western Greenland seawater, contributions from global fallout (GF) constitute about 30% of 236U. The dominating source for 236U, i.e. 70 %, is associated to reactor 236U including discharges from RP and local reactor input in the Arctic Ocean.

Organisation(s)
Isotope Physics
External organisation(s)
Technical University of Denmark (DTU)
Journal
Chemosphere
Volume
257
No. of pages
10
ISSN
0045-6535
DOI
https://doi.org/10.1016/j.chemosphere.2020.127185
Publication date
10-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
103014 Nuclear physics, 105904 Environmental research
Keywords
ASJC Scopus subject areas
Environmental Engineering, Environmental Chemistry, Chemistry(all), Pollution, Health, Toxicology and Mutagenesis
Portal url
https://ucris.univie.ac.at/portal/en/publications/first-dataset-of-236u-and-233u-around-the-greenland-coast(28537f51-2686-4e47-99f6-3c6c4e2b7829).html