Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-69 - C1-74|
|Published online||14 October 2009|
Uranium distribution of a lake sediments in a former mining area
CEMRAD-IRCOM/C2M, 83 rue d'Isle, 87000 Limoges, France
2 LSCE, Domaine du CNRS, avenue de la Terrasse, 91198 Gif-sur-Yvette, France
During uranium mining activities in Limousin, waters from the mines have been processed and sent back to environment, leading to the deposition of important quantities of radio-elements of uranium series in the sediments of a lake. While the lake was drained, surface and core samples have been collected for analysis using gamma spectrometry. 238U activities as important as 20 000 Bq/Kg have been measured in surface sediments. The mapping of 238U in surface sediments and the analysis of 238U, 226Ra and 210Pb activities in the cores show that the transfer of radio-elements from waters to sediments is mainly due to solid particles carried by the river into the lake.
© EDP Sciences, 2002
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