墨西哥下加利福尼亚州科罗拉多河三角洲沉积物岩芯中硒、钼和铀的分布。
Distribution of selenium, molybdenum and uranium in sediment cores from the Colorado River delta, Baja California, Mexico.
机构信息
Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Km 107 Carretera Tijuana-Ensenada, 22860, Ensenada, Baja California, Mexico.
出版信息
Bull Environ Contam Toxicol. 2012 Jan;88(1):104-7. doi: 10.1007/s00128-011-0440-7. Epub 2011 Nov 4.
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.
研究了科罗拉多河三角洲约 1.5 m 沉积物岩芯中硒、钼和铀的分布情况，这些岩芯位于科罗拉多河（CR）和哈迪河（HR）河床。HR2 岩芯底部的硒、钼和铀浓度最高（分别为 2.3、0.95 和 1.8 μg g-1），存在于大坝建设前沉积的砂质粉砂层中。在 CR5 中，这些元素的最高浓度（分别为 0.9、1.4 和 1.7 μg g-1）位于岩芯顶部的富含有机碳的表层中。HR2 的几个样本中的硒含量高于可能产生毒性影响的指导值。
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