title: Distribution of selenium, molybdenum and uranium in sediment cores from the Colorado River delta, Baja California, Mexico.
abstract: The distribution of selenium, molybdenum and uranium was studied in ~1.5 m sediment cores from the Colorado River delta, at the Colorado (CR) and Hardy (HR) riverbeds. Core HR2 showed highest Se, Mo and U concentrations at its bottom (2.3, 0.95 and 1.8 μg g(-1)) within a sandy-silt layer deposited prior to dam construction. In CR5 the highest concentrations of these elements (0.9, 1.4 and 1.7 μg g(-1) respectively) were located at the top of the core within a surface layer enriched in organic carbon. A few samples from HR2 had Se above the probable toxic effect level guidelines.
authors: Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Km 107 Carretera Tijuana-Ensenada, 22860, Ensenada, Baja California, Mexico.
authors: A
authors: A
authors: Orozco-Durán
authors: L W
authors: LW
authors: Daesslé
authors: E A
authors: EA
authors: Gutiérrez-Galindo
authors: A
authors: A
authors: Muñoz-Barbosa
mesh_terms: D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D008800:Mexico; D008982:Molybdenum / Q000032:analysis*; D045483:Rivers / Q000737:chemistry*; D012643:Selenium / Q000032:analysis*; D014501:Uranium / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D014874:Water Pollutants, Chemical; D014501:Uranium; D008982:Molybdenum; D012643:Selenium