| Autor: |
Paraskiv, A. A., Tereshchenko, N. N., Proskurnin, V. Yu., Chuzhikova-Proskurnina, O. D., Vakhrushev, M. O. |
| Předmět: |
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| Zdroj: |
Oceanology (00014370); 2023 Suppl 1, Vol. 63, pS155-S164, 10p |
| Abstrakt: |
The article presents the results of a quantitative determination of the migration and distribution fluxes of plutonium radioisotopes 239 + 240Pu in coastal semiclosed marine ecosystems from a case study example of Sevastopol Bay (Black Sea) to assess the self-purification of water masses from 239 + 240Pu. The assessment was based on a study of the current (2018–2021) levels of the activity concentration of 239 + 240Pu in water, bottom sediments, perennial brown macroalgae, and benthic fish. It has been found that the main 239 + 240Pu removal flux (more than 93% of the total flux), which determines the self-purification of water masses with respect to 239 + 240Pu in coastal marine areas is the sediment flux of suspended particle matter, which causes redistribution of 239 + 240Pu into bottom sediments. 239 + 240Pu migration to neighboring water areas due to hydrological processes is insignificant, as well as the decrease in 239 + 240Pu in the ecosystem due to radioactive decay. In total, these processes accounted for less than 1% of the total flux. The interaction of 239 + 240Pu with macrobiota accounted for almost 6%, of which more than 5% was provided by macrophytes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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