Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English, Russian   Periodicity: 4 times per year   Open access peer reviewed journal

Full text (ru)

Abstract: Quantitative parameters of migration of ¹³⁷Cs to the bottom sediments of eutrophic (Kyiv reservoir) and oligotrophic (Lake Beloe) water bodies after the dying out of Phragmites australis, Tуpha angustifolia, Glyceria maxima and Scirpus lacustris were determined. The specific activity of ¹³⁷Cs in the overground organs and plant rhizomes was 8 - 522 Bq/kg, in soil roots – 139 - 3410 Bq/kg. After the dying out of the plants, 1.6 - 8.7 % of the total ¹³⁷Cs accumulated in the phytomass enters the water masses, 4.9 - 19.7 % enters the detritus, and 63.5 - 83.9 % enters the bottom sediments. In shallow water areas of the studied water bodies as a result of the dying out of helophytes, from 0.3 to 1.1 % of ¹³⁷Cs of its total number in the upper 30 cm layer of bottom sediments are annually transferred to bottom sediments.

Keywords: water bodies, helophytes, ¹³⁷Cs migration, bottom sediments.

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