Archives2019Vol. 59, No. 6pp. 627-642

Article

Complex Approach in Assessment of the Ecological Status of Aquatories N. N. Tereshchenko*, V. Yu. Proskurnin, A. A. Paraskiv

N. N. Tereshchenko, V. Yu. Proskurnin, A. A. Paraskiv

A.O. Kovalevsky Institute of Marine Biological Research of RAS, Sevastopol, Russian

Abstract

An integrated approach is proposed using biogeochemical and equidosimetric criteria to assess the current and prognostic radioecological status of the studied water areas with respect to man-made radioactive long-lived isotopes 239,240Pu on the basis of a scheme for carrying out the studies and their result analysis and their application for the purposes of ecological rationing of 239,240Pu input. The scheme takes into account not only the levels of radionuclide content, but also the influence of biogeochemical processes in this ecosystem on the fate of radionuclides and their physical-chemical properties in both migration and radiation-ecological aspects. On the example of the Black Sea coastal water area, the scheme has been implemented with respect to 239,240Pu. A comparative assessment of the hydrological, sedimentation and macro-biotic fluxes of 239,240Pu from the bay waters showed that the leading role in the removal of plutonium from water masses in the ecosystem belongs to the biogeochemical sedimentation flux of plutonium into the bottom sediments (~ 99%). Based on the calculated ionizing radiation dose commitments by 239,240Pu radioisotopes to hydrobionts and the conceptual model of chronic action zonality of ionizing irradiations dose rates in the nature of G.G. Polikarpov, an assessment of the ecological influence of dose rate levels from 239,240Pu to aquatic biota was carried out. The opportunity of mutual transition between biogeochemical and equidozimetric criteria for the use of these parameters in the practice of managing and monitoring of the ecological status of the whole sea or their separate water areas was shown.

Keywords

Plutonium radioisotopes 239,240Pu, migration features, type of biogeochemical behavior, the Black Sea, biogeochemical and equidozimetric criteria, scheme for assessing the ecological condition of aquatic ecosystems

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