The Results of Experimental Studies of the Absorption of Radioisotopes 85Sr and 54Мn by Macrophyte Algae of the Barents Sea

Мұқаба

Дәйексөз келтіру

Толық мәтін

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Аннотация

The high accumulating capacity of the brown littoral macroalgae of the northern seas Fucus vesiculosus in relation to two short-lived gamma-emitting radionuclides 85Sr and 54Мn has been experimentally shown. The relevance of these studies is due to the spread of technogenic radionuclides in plants of this species in the Barents Sea, the presence of potential sources of radioactivity in the coast of the Kola Peninsula and increasing attention to the use of seaweed in various spheres of life support of the population. In laboratory experiments, it was found that the studied radionuclides are strongly bound by algae tissues. No return release of the absorbed radioisotopes into the aqueous medium was recorded during the experiment. The maximum rate of isotope accumulation in F. vesiculosus was noted on the first day of the experiment, its value for 85Sr is twice as high as for 54Мn. The average specific activity of 85Sr in algae reached an equilibrium value on the 6th day of exposure, and for 54Мn on the 2nd day of exposure. The viability and functional activity of plants throughout the experiment (14 days) was confirmed by a relatively high level of photosynthesis intensity and an increase in the biomass of fucus thalloms in all experimental vessels with the addition of isotopes 85Sr and 54Мn, as well as in the control one. During the experiment, the possibility of absorption of isotopes 85Sr and 54Мn by fucus epibionts and dead plant particles was revealed, which, however, does not affect the results of the experiment. It is proposed to use the obtained results for predictive assessments of the radioecological situation in various incidents involving the use, storage and transportation of radioactive materials in the Barents Sea, and F. vesiculosus as an indicator of radioactive contamination of the environment of Arctic marine ecosystems.

Негізгі сөздер

Авторлар туралы

I. Usyagina

Murmansk Marine Biological Institute of the Russian Academy of Sciences

Murmansk, Russian Federation

G. Voskoboinikov

Murmansk Marine Biological Institute of the Russian Academy of Sciences

Email: voskoboynikov@mmbi.info
Murmansk, Russian Federation

D. Pugovkin

Murmansk Marine Biological Institute of the Russian Academy of Sciences

Murmansk, Russian Federation

D. Salakhov

Murmansk Marine Biological Institute of the Russian Academy of Sciences

Murmansk, Russian Federation

G. Ilyin

Murmansk Marine Biological Institute of the Russian Academy of Sciences

Murmansk, Russian Federation

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