|Dopov. Nac. akad. nauk Ukr. 2020, 10:85-92|
Seasonal changes in the content of 137Cs in soils were studied at three forest ecosystems in the territory of the Chernobyl exclusion zone. The soils were selected layer by layer: A0l, A0f+A0h, 0-5 and 5-10 cm with the frequency of once every two weeks during 2013-2015. Intermittent changes in the levels of the specific activity of 137Cs in all studied soil layers during the calendar year were recorded at the sites. The dependences of the content of 137Cs in different soil layers on the season of the year have not been identified. The calculation of correlation coeffi cients indicates the existence of a relationship between fluctuations in the concentration of radiocaesium only between layers of 0-5 and 5-10 cm. Air temperature and precipitation over different time intervals preceding the sampling do not affect the redistribution of 137Cs in the soil of the forest ecosystems. It has been suggested that the absence of seasonal patterns of changes in the content of 137Cs in soils is associated with its heterogeneity (different amounts of soil biota in each sample).
|Keywords: 137Cs, Chernobyl NPP, circulation, soil|
1. Miller, K. M., Kuiper, J. L. & Heifer, I. K. (1990). 137Cs fallout depth distributions in forest versus field. J. Environ. Radioact., 12, pp. 23-47.
2. Kiselev, G. P., Bazhenov, A. V., Zykov, S. B. & Kiseleva, I. M. (2001, March). 137Cs, 232Th, 226Ra, 40K in the soils of the European North. Proceedings of the International Conference Biological effects of small doses of ionizing radiation and radioacontammant of environment (pp. 139-140). Syktyvkar (in Russian).
3. Artemyev, O. I. & Umarov, M. A. (2006, December). Radionuclides distribution from the 1953 explosion at the Semipalatinsk test site. Proceeding of the International Scientific Conference Radioactivity after nuclear explosions and ac cidents, Vol. 2, (pp. 240-253). Moscow (in Russian).
4. Tichomirov, F. A. (1993). Radionuclide distribution and migration in EURT forests. In Ecological after-effects of the radioactive contamination at South Ural (pp. 21-39). S.-Petersburg (in Russian).
5. Perevolotsky, A. N. (2006). Distribution of 137Cs and 90Sr in forest biogeocenoses. Minsk (in Russian).
6. Shcheglov, A. I. (1999). Biogeochemistry of technogenic radionuclides in forest ecosystems. Moscow (in Russian).
7. Rühm, W., Steiner, M., Wirth, E., Dvornik, A., Zhuchenko, T., Kliashtorin, A., Rafferty, B., Shaw, G. & Kuchma, N. (1996, March). Dynamic of radionuclides behaviour in forest soils. Proceedings of the first International Conference The radiological consequences of the Chernobyl accident (pp. 225-228). Minsk.
8. Ivanov, Y. O. (2001). Dynamics of radionuclide redistribution in soils and vegetation. In Chornobyl. The Exclution Zone (pp. 47-76). Kyiv (in Ukrainian).
9. Bulavik, I. M. & Perevolotsky, A. N. (1998). Migration of 137Cs in forest soils of Belorussian Polesie. Col lection of scientific works of Polesskaya ALNIS, Iss. 5, Problems of ecology of forests and forest use on Po lissya of Ukraine, pp. 14-21 (in Russian).
10. Landyn, V., Krasnov, V., Kurbet, T., Orlov, O., Savuschyk M. & Davydov M. (2011). The results of radioecological research in Ukraine forest ecosystems contaminated by Chernobyl Nuclear Power Plant accident releases. Agroecol. J., 1, pp. 53-57 (in Ukrainian).
11. Zarubina, N. E., Malyuk, I. A., Kotishevskaya, E. Yu., Teletskaya, S. V., Golovach, A. I. & Golovach, L. A. (2009). Seasonal changes of specific activity of 137Cs in soil on the territory of ranges 30-km zones of ChNPP and “the southern trace”. Nucl. Phys. Atom. En., 10, No. 4, pp. 413-417 (in Russian).
12. Zibtsev, S. V. (2013). Theoretical and methodological justification of forest monitoring in the zones of radioactive contamination as a result of the accident on Chernobyl NPP. (Extended abstract of Doctor thesis). National University of Life and Environmental Sciences of Ukraine, Kyiv, Ukraine (in Ukrainian).
13. Bondarenko, G. N., Kononenko, L. V., Dolin, V. V., Sushchik, Y. J., Arhipov, A. M. & Shramenko, I. F. (2001, April). Cyclicity in biogeochemical migration processes 137Cs. Proceedings of the International Conference Fifteen years after the Chornobyl accident. Lessons learned (pp. 2-147). Kyiv (in Ukrainian).
14. Dobrovolsky, G. V. (Ed.). (2003). Structural and functional role of soils and soil biota in the biosphere. Moscow (in Russian).