Sequential extraction tests were used to study partitioning of U in the bottom sediments of two reservoirs that have been used for the temporary storage of nuclear waste at the “Mining and Chemical Combine” (Zheleznogorsk, Krasnoyarsk region, Russia). Various sequential extraction protocols were applied to the bottom sediment samples and the results compared with those obtained for laboratory-prepared simulated samples with different speciation and partitioning, e.g., U(VI) sorbed onto various inorganic minerals and organic matter, as well as uranium oxides. The distributions of uranium in fractions extracted from simulated and actual contaminated samples were compared to shed light on the speciation of U in the bottom sediments. X-ray absorption spectroscopy, X-ray diffraction, and scanning electron microscopy were also used to analyze the partitioning of U in contaminated sediments. We also compared the results obtained using the spectroscopic and microscopic techniques, as well as sequential extraction.

序贯抽提试验被用于研究铀在两个矿藏的底部沉积物中的分配，这些储藏已被用于“采矿和化学联合工厂”（俄罗斯克拉斯诺亚尔斯克地区的兹列兹诺戈尔斯克）的临时储存。将各种顺序提取方案应用于底部沉积物样品，并将结果与​​实验室制备的具有不同形态和分区的模拟样品所获得的结果进行比较，例如，U（VI）吸附到各种无机矿物和有机物质以及氧化铀上。比较了从模拟污染样品和实际污染样品中提取的铀中铀的分布，以揭示底部沉积物中铀的形态。X射线吸收光谱，X射线衍射，扫描电镜还分析了铀在污染沉积物中的分配。我们还比较了使用光谱和显微技术以及顺序提取获得的结果。