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Speciation of Artificial Radionuclides ~(60)Co, ~(137)Cs, ~(152)Eu, and ~(241)Am in Bottom Sediments of the Yenisei River

机译:叶尼塞河底部沉积物中〜(60)Co,〜(137)Cs,〜(152)Eu和〜(241)Am人工放射性核素的形态

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摘要

The speciation of artificial radionuclides ~(60)Co, ~(137)Cs, ~(152)Eu, and ~(241)Am in surface layers of bottom sediments of the Yenisei river, collected within the near zone of impact of the Mining and Chemical Combine (Rosatom), was studied. In these samples the radionuclides ~(60)Co, ~(152)Eu, and ~(241)Am are mainly associated with fractions of humic and fulvic acids. The fraction of ~(152)Eu associated with nonsilicate iron is approximately 92percent. The migration capability of radionuclides collected near the Atamanovo settlement decreases in the order ~(152)Eu > ~(241)Am > ~(60)Co > ~(137)Cs. For samples collected near Bol'shoi Balchug settlement, this order is as follows: ~(152)Eu approx= ~(241)Am > ~(60)Co > ~(137)Cs. The presence of radionuclide-bearing micro-particles in bottom sediments considerably complicates the distribution of radionuclides, in particular, of ~(241)Am and ~(137)Cs, among migration forms.
机译:在采矿影响区附近收集的叶尼塞河底部沉积物表层中的〜(60)Co,〜(137)Cs,〜(152)Eu和〜(241)Am人工放射性核素的形态和化学联合收割机(Rosatom)进行了研究。在这些样品中,放射性核素〜(60)Co,〜(152)Eu和〜(241)Am主要与腐殖酸和富里酸的分数有关。与非硅酸铁有关的〜(152)Eu的比例约为92%。在阿塔马诺沃定居点附近收集的放射性核素的迁移能力以〜(152)Eu>〜(241)Am>〜(60)Co>〜(137)Cs的顺序降低。对于在Bol'shoi Balchug定居点附近收集的样品,该顺序如下:〜(152)Eu大约=〜(241)Am>〜(60)Co>〜(137)Cs。底部沉积物中含放射性核素的微粒的存在使放射性核素,特别是〜(241)Am和〜(137)Cs在迁移形式之间的分布大大复杂化。

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