Tracing U mobility in deep groundwater using Ra isotopes
The mobility of natural U is compared among four boreholes in a fractured granite using Ra isotopes and geochemical modelling. 222Rn/226Ra activity ratios (ARs) spanning an order of magnitude underline differences in reactive surface area. (224Ra/228Ra)ARs up to 9 indicate recent changes in hydrogeo...
| Main Authors: | , , , , , , , |
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| Format: | Conference item |
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Elsevier
2017
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| _version_ | 1797083073704099840 |
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| author | Krall, L Auqué, L Tullborg, E Suksi, J Trezzi, G Garcia-Orellana, J Andersson, P Porcelli, D |
| author_facet | Krall, L Auqué, L Tullborg, E Suksi, J Trezzi, G Garcia-Orellana, J Andersson, P Porcelli, D |
| author_sort | Krall, L |
| collection | OXFORD |
| description | The mobility of natural U is compared among four boreholes in a fractured granite using Ra isotopes and geochemical modelling. 222Rn/226Ra activity ratios (ARs) spanning an order of magnitude underline differences in reactive surface area. (224Ra/228Ra)ARs up to 9 indicate recent changes in hydrogeochemistry, and (226Ra/228Ra)ARs 0.6-30 indicate variable deposition of U. Dissolved U is related to dissolution of a solid U(VI) phase by groundwater with HCO3− >20 mg·L-1. U reduction is hindered by Ca2UO2(CO3)30. |
| first_indexed | 2024-03-07T01:36:49Z |
| format | Conference item |
| id | oxford-uuid:957a9abf-c048-4e0f-91a2-6da66f1896ac |
| institution | University of Oxford |
| last_indexed | 2024-03-07T01:36:49Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:957a9abf-c048-4e0f-91a2-6da66f1896ac2022-03-26T23:46:26ZTracing U mobility in deep groundwater using Ra isotopesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:957a9abf-c048-4e0f-91a2-6da66f1896acSymplectic Elements at OxfordElsevier2017Krall, LAuqué, LTullborg, ESuksi, JTrezzi, GGarcia-Orellana, JAndersson, PPorcelli, DThe mobility of natural U is compared among four boreholes in a fractured granite using Ra isotopes and geochemical modelling. 222Rn/226Ra activity ratios (ARs) spanning an order of magnitude underline differences in reactive surface area. (224Ra/228Ra)ARs up to 9 indicate recent changes in hydrogeochemistry, and (226Ra/228Ra)ARs 0.6-30 indicate variable deposition of U. Dissolved U is related to dissolution of a solid U(VI) phase by groundwater with HCO3− >20 mg·L-1. U reduction is hindered by Ca2UO2(CO3)30. |
| spellingShingle | Krall, L Auqué, L Tullborg, E Suksi, J Trezzi, G Garcia-Orellana, J Andersson, P Porcelli, D Tracing U mobility in deep groundwater using Ra isotopes |
| title | Tracing U mobility in deep groundwater using Ra isotopes |
| title_full | Tracing U mobility in deep groundwater using Ra isotopes |
| title_fullStr | Tracing U mobility in deep groundwater using Ra isotopes |
| title_full_unstemmed | Tracing U mobility in deep groundwater using Ra isotopes |
| title_short | Tracing U mobility in deep groundwater using Ra isotopes |
| title_sort | tracing u mobility in deep groundwater using ra isotopes |
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