Nuclear Physics and Atomic Energy

ядерна ф≥зика 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

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Nucl. Phys. At. Energy 2018, volume 19, issue 1, pages 56-62.
Section: Radiobiology and Radioecology.
Received: 30.01.2018; Accepted: 22.03.2018; Published online: 12.05.2018.
PDF Full text (ru)
https://doi.org/10.15407/jnpae2018.01.056

Dying out of the helophytes as the factor of migration of 137Cs in water bodies

O. M. Volkova, V. V. Belyaev*, S. P. Pryshlyak, O. O. Parkhomenko

Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine

*Corresponding author. E-mail address: belyaev-vv@ukr.net

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 Ц 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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