Hannover 2016 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 10: Posters III
MS 10.2: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Iodine-129 and iodine-129 in natural waters from Fuhrberger Feld catchment near Hannover, Germany — •Alfatih Osman1, Stefan Bister1, Abdelouahed Daraoui1, Alex Hoelzer1, Beate Riebe1, Clemens Walther1, Christof Vockenhuber2, and Hans-Arno Synal2 — 1Institute for Radioecology and Radiation Protection (IRS), Leibniz University of Hannover, Germany — 2Laboratory of Ion Beam Physics, ETH Zurich, Switzerland
Environmental input of anthropogenic iodine-129 has been increased due to various nuclear applications. Such releases lead to a diffuse pollution of large scale reservoirs. In the framework of the TransAqua project, funded by BMBF, we are aiming at assessing the sensitivity of the drinking water reservoir in Fuhrberger Feld catchment near Hannover with regard to introduction and accumulation of iodine-129. For that purpose, surface- and groundwaters were analyzed for I-127 and I-129 using ICP-MS and AMS. I-129/I-127 isotopic ratios in all samples are significantly higher than the pre-nuclear isotopic ratio (1.5*10-12). Concentrations of I-129 of the investigated waters were compared to other environmental compartments in the same region (Lower Saxony). The investigated groundwater revealed comparable I-129 concentration and I-129/I-127 isotopic ratio as in surface waters from the same area, but higher values in contrast to other aquifers in the same region. This means that the water reservoir in Fuhrberger Feld has already been slightly affected by atmospheric input of anthropogenic I-129, which is most likely originating from the European reprocessing plants.