Saari Hanna-Kaisa, Schmidt Sabine, Huguet Stéphanie, Lanoux Aurélie
UMR CNRS 5805 Environnements et Paléoenvironnements Océaniques, Université Bordeaux 1, Avenue des Facultés, 33405 Talence Cedex, France.
J Environ Radioact. 2008 Feb;99(2):426-35. doi: 10.1016/j.jenvrad.2007.11.016.
Dissolved uranium ((238)U(D)) was measured within the Gironde fluvial-estuarine system (France), which is well known for its heavy metal pollution and its subsequent environmental effects. Dissolved (238)U activities exhibit the highest levels and variability in the small watersheds of the Isle and Riou-Mort rivers, ascribed to low discharges and the occurrence of peculiar features (local U ore deposits; Permian layers). The major tributaries of the Gironde Estuary: Garonne, Lot and Dordogne, show rather stable (238)U(D), higher than the global mean riverine uranium activity. In the Gironde Estuary (238)U(D) behaves conservatively along the river-estuary-ocean transect. Dissolved (238)U distribution in the Gironde fluvial-estuarine system can be explained by the characteristics of considered drainage basins. There is no evidence of anthropogenic pollution.
在以重金属污染及其后续环境影响而闻名的法国吉伦特河河口系统中，对溶解态铀（(238)U(D)）进行了测量。溶解态(238)U活度在 Isle 河和 Riou-Mort 河的小流域中呈现出最高水平和最大变异性，这归因于低流量以及特殊特征（当地铀矿床；二叠纪地层）的存在。吉伦特河口的主要支流：加龙河、洛特河和多尔多涅河，显示出相对稳定的(238)U(D)，高于全球河流铀活度均值。在吉伦特河口，(238)U(D)在从河流到河口再到海洋的断面中表现为保守行为。吉伦特河河口系统中溶解态(238)U的分布可以由所考虑流域的特征来解释。没有人为污染的证据。
