Larionova Natalya Vladimirovna (Candidate of Biological Sciences, Branch ‘Institute of Radiation Safety and Ecology’ Republican State Enterprise ‘National Nuclear Center of the Republic of Kazakhstan’ (Kurchatov city, Kazakhstan))
Ivanova Axana Romanovna (Branch ‘Institute of Radiation Safety and Ecology’ Republican State Enterprise ‘National Nuclear Center of the Republic of Kazakhstan’ (Kurchatov city, Kazakhstan))
Aidarkhanov Assan Oralkhanovich (Candidate of Biological Sciences, Branch ‘Institute of Radiation Safety and Ecology’ Republican State Enterprise ‘National Nuclear Center of the Republic of Kazakhstan’ (Kurchatov city, Kazakhstan))
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The content of artificial radionuclides such as 241Am, 137Cs, 90Sr and 239+240Pu has been addressed in herbaceous plants, soil and forest floor in the radioactive fallout plume area left from the first nuclear test (August 29, 1949) that was conducted at Semipalatinsk Test Site. It was found that maximum values of activity concentration in soil are characteristic of 239+240Pu (up to 240 Bq/kg) and 137Cs (up to 120 Bq/kg), comparatively lower for 90Sr (up to 71 Bq/kg), for 241Am these do not exceed 5.1±1.1 Bq/kg. The content of radionuclides in plants was quantitatively registered for only 90Sr and 239-240Pu, maximum accumulation is observed for 90Sr. Much of 241Am, 137Сs and 90Sr is in forest floor (distribution of 239-240Pu is more uniform). At the same time, 241Am is oftentimes concentrated in its mineral component, and 90Sr – in its organic component which in turn is proved by being more accumulated by plants.
Keywords:Semipalatinsk Test Site (STS), artificial radionuclides, accumulation factors, forest ecosystem
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Citation link:
Larionova N. V., Ivanova A. R., Aidarkhanov A. O. Artifi cial radionuclides in soil-plant cover of forest ecosystems long after nuclear tests conducted at semipalatinsk test site // Современная наука: актуальные проблемы теории и практики. Серия: Естественные и Технические Науки. -2019. -№09. -С. 19-24 |
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