The fate of Chernobyl radionuclides in aquatic ecosystems within the Exclusion Zone
The distribution and dynamics of radionuclides during 1997-2006 in the main components (bottom sediments, water, suspended matter, higher aquatic plants, bottom invertebrates, fish, bivalvia and gasteropoda molluscs) of aquatic ecosystems within the Chernobyl exclusion zone has been studied. The part of <90>Sr in bottom sediments of lake ecosystems was 89％-95％, <137>Cs-99％, transuranic elements (TUE) practically 100％ of the total content in ecosystem. The increased migration activity of <90>Sr causes the greater part of the radionuclide in water (4％-10％) in comparison with 137Cs (0. 5％-0. 6％) and TUE (0. 03％-0. 04％), and vice versa-the less part of 90Sr in suspended matter (0. 15％-0. 16％) in comparison with <137>Cs (0. 25％- 0. 30％) The part of <90>Sr in biotic component is 0. 25％-0. 61％, <137>Cs-0. 14％-0.47％, TUE-0. 07％-0. 16％ of the total content in ecosystem. Due to intensification of migration activity of <90>Sr within exclusion zone there is a tendency of increase of its accumulation by biota and dose formed significance.
aquatic ecosystems bottom sediments Chernobyl accident hydrobionts radionuclides water
D. I. Gudkov A. B. Nazarov
Department of Radioecology, Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev State Specialised Scientific and Production Enterprise Chemobyl Radioecological Centre, Ministry o
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
398-399
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）