Siberian Federal University

Issue

Journal of Siberian Federal University. Biology. 2017 10 (1)

Authors

Tereshchenko, Nataliya N.

Contact information

Tereshchenko, Nataliya N.: A.O. Kovalevsky Institute of Marine Biological Research RAS 2 Nakhimov, Sevastopol, 299011, Russia;

Keywords

239+240Pu; 239,240Pu; migration; sedimentation; trophic level; the Black Sea; Mediterranean Sea

Abstract

The comparative analysis of an impact of the trophic level on the redistribution of plutonium radionuclides in marine ecosystems at different spatial scales was carried out for semi-closed coastal areas, the western part of the Black Sea, open areas of the Black and Mediterranean seas. The quantitative characteristics of radioecological processes of the sedimentation of 239+240Pu radionuclides in bottom sediments in the coastal and open areas of the Black Sea, as well as effective half-life of 239+240Pu in the Black Sea surface waters were determined. It was shown that an increase in water trophic level, causing an increase of the suspended matter concentration and sedimentation rate, played a significant role in the redistribution of 239+240Pu. There was a strengthening of plutonium pedotrophic properties and increase the rate of self-purification of the Black Sea surface water regarding the plutonium radionuclides by their redistribution into the bottom sediments. Trophic level of sea waters affected the values of the radioecological parameters of the 239+240Pu migration at studied areas, the radioecological status of the sea in the basin regarding the radionuclides of plutonium, and biogeochemical type of Pu behavior in the seas

Pages

20-34

Paper at repository of SibFU

https://elib.sfu-kras.ru/handle/2311/32107

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).