Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.jenvrad.2024.107553 |
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| Title (Primary) | Radio-sulphur as groundwater residence time tracer – Adapting the 35S extraction approach for water samples rich in sulphate |
| Author | Schubert, M.; Kopitz, J.; Taeglich, S.; Lucks, C.; Knoeller, K. |
| Source Titel | Journal of Environmental Radioactivity |
| Year | 2024 |
| Department | CATHYD |
| Volume | 280 |
| Page From | art. 107553 |
| Language | englisch |
| Topic | T5 Future Landscapes T4 Coastal System |
| Keywords | Radio-sulphur; 35S; Sulphate-rich water samples; Sample preparation; LSC; Groundwater tracing |
| Abstract | Cosmogenic radio-sulphur (35S) is applicable as aqueous environmental tracer for investigating sub-yearly groundwater residence times. For the purpose 35SO4 has to be extracted from large-volume water samples (ca. 20 l) and measured by liquid scintillation counting (LSC). Publications that discuss sample preparation approaches focus on waters with low or moderate sulphate concentrations based on sulphate extraction using an ion-exchange resin. However, sulphate extraction by ion-exchange is not feasible for water samples that contain total sulphate loads of over about 1500 mg. Our paper presents an approach for the preparation of water samples with sulphate loads of up to 6000 mg based on BaSO4 precipitation directly from the sample. The key challenge of this approach is the co-precipitation of interfering natural radionuclides (226Ra, short-lived progeny of 222Rn, 210Pb + progeny, 32/33P), which complicates LSC measurement of 35S. Two options are discussed to allow either pre-precipitating the unwanted radionuclides before, or keeping them in solution during Ba35SO4 precipitation. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=29808 |
| Schubert, M., Kopitz, J., Taeglich, S., Lucks, C., Knoeller, K. (2024): Radio-sulphur as groundwater residence time tracer – Adapting the 35S extraction approach for water samples rich in sulphate J. Environ. Radioact. 280 , art. 107553 10.1016/j.jenvrad.2024.107553 |
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