Publication Details |
| Category | Text Publication |
| Reference Category | Book chapters |
| Title (Primary) | Contribution from carbon and sulphur isotopes to the evaluation of biogeochemical processes in groundwater systems controlled by river bank filtration - an example from Torgau aquifer (Saxony, Germany) |
| Title (Secondary) | Isotope techniques in the study of environmental change. Proceedings of an International Symposium on Isotope Techniques in the Study of Past and Current Environmental Changes in the Hydrosphere and the Atmosphere, organized by the International Atomic Energy Agency and held in Vienna, 14-18 April 1997 |
| Author | Mallén, G.; Trettin, R.; Strauch, G.; Gehre, E.; Grischek, T.; Geyer, S. |
| Source Titel | IAEA-SM |
| Year | 1997 |
| Department | HDG; ISOHYD |
| Volume | 349 |
| Page From | 389 |
| Page To | 401 |
| Language | englisch |
| Abstract | Sulphur and carbon isotopes were used to reveal flow processes and chemical reactions within an aquifer system partially controlled by river bed infiltration. The investigation site, located at the Elbe river, is the most important water supply area of Saxony. An arrangement of about 40 groundwater sampling points, screened in five or three depth levels within a section crossing the Elbe, was used to describe the situation in the Quaternary aquifer. Using 34S (SO4) and 13C (DIC) as tracers, an improved understanding of the flow pattern has been obtained, especially regarding the penetration of groundwater into the aquifer zone below the Elbe bed. Furthermore, groundwater and Elbe water show different isotope signatures. Depletion of 34S in the area between the Elbe and the production wells is attributed to the oxidation of pyritic sulphur. The measured radiocarbon concentrations of groundwater fulvic acids suggest that less than 50% of the DOC originates from old sedimentary organic carbon (SOC) sources in the aquifer. 14C decrease along the flow path from the Elbe to the captation facilities has been observed and is proposed as being due to a simultaneous degradation of Elbe DOC and dissolution of old SOC from the penetrated aquifer. The unusual chemical and isotopic composition of groundwater near the edge of the investigated profile is interpreted as a local influence of ascending waters coming from Zechstein formations and penetrating the overlaying Triassic and Tertiary layers via tectonic faults or geological windows. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=9466 |
| Mallén, G., Trettin, R., Strauch, G., Gehre, E., Grischek, T., Geyer, S. (1997): Contribution from carbon and sulphur isotopes to the evaluation of biogeochemical processes in groundwater systems controlled by river bank filtration - an example from Torgau aquifer (Saxony, Germany) Isotope techniques in the study of environmental change. Proceedings of an International Symposium on Isotope Techniques in the Study of Past and Current Environmental Changes in the Hydrosphere and the Atmosphere, organized by the International Atomic Energy Agency and held in Vienna, 14-18 April 1997 IAEA-SM 349 International Atomic Energy Agency (IAEA), Vienna, p. 389 - 401 |
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