Comparative assessment of the distribution of Cs-137 in the soil cover on the territory of Tajikistan

«Radiation and Risk», 2023, vol. 32, No. 4, pp.24-34

DOI: 10.21870/0131-3878-2023-32-4-24-34

Authors

Mirsaidov U.M. – Chief Researcher, D. Sc., Chem., Prof., Academician of NAST. Contacts: 33 Rudaky av., Dushanbe, Tajikistan, 734025. Tel: (+992 37) 227 83 83; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .
Akhmedov M.Z. – Deputy Director, C. Sc., Chem.
Nazarov Kh.M. – Director of Branch, D. Sc., Tech., Prof.
Rakhimberdiev Sh.A. – Researcher
Muminov S.V.– Head of Sector. Chemical, Biological, Radiological and Nuclear Safety and Security Agency of NAST.
Mukhamedova S.V. – Prof. of Dep., D. Sc., Biol. I.M. Sechenov First MSMU.
¹ Chemical, Biological, Radiological and Nuclear Safety and Security Agency of NAS of Tajikistan, Dushanbe, Republic of Tajikistan
² I.M. Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation, Moscow

Abstract

The article presents the results of a comparative assessment of the distribution of the technogenic radionuclide ¹³⁷Cs in the soil cover on the territory of the Republic of Tajikistan. It is noted that the accumulation of the ¹³⁷Cs isotope in the territory depends on the terrain and soil type. At the foot of the mountains and in clay soils, a relatively high content of the ¹³⁷Cs isotope is observed compared to plains and sandy soils. The migration of radionuclide ¹³⁷Cs deep into the vertical is observed in the soils of sandy rock. It is shown that the values of the average specific activity of the ¹³⁷Cs isotope in the soil cover of Southern Tajikistan are 2.5 times lower than the average specific activities of the soils of Northern and Central Tajikistan. The highest values of specific soil activity of 17.0 Bq/kg were noted in the southeastern regions of Tajikistan. This circumstance is primarily due to the fact that precipitation and dust storms coming from the countries of South and Southeast Asia lead to the settling of particles, primarily on the slopes of the mountains. Thus, based on the analysis of the literature review in the direction under study and the results obtained, the authors revealed that the spatial distribution of ¹³⁷Cs radionuclide in the soil cover in the Republic of Tajikistan depends on the direction of the wind rose and the terrain. Analysis of the samples obtained allows us to conclude that the content of ¹³⁷Cs radionuclide is due to its long-range air transport.

Key words
¹³⁷Cs, soil, specific activity, spectrometry, relief, wind, foothills, sediment, sample, isotope.

References

1. Zakharchenko G.L., Polyakova E.V., Milovanov S.N., Efimof Yu.M. Radiation situation on the territory of the Orel region affected by the radioactive contamination due to the Chernobyl accident. Radiatsionnaya Gygiena – Radiation Hygiene, 2011, vol. 4, no. 2, pp. 120-124. (In Russian).

2. Zakharchenko G.L., Pereverzeva E.N., Vasilev A.A., Polyakova E.V., Milovanov S.N. Radiation conditions in the Oryol region territory impacted by radioactive contamination caused by the Chernobyl NPP accident. Radiatsionnaya Gygiena – Radiation Hygiene, 2016, vol. 9, no. 2, pp. 56-62. (In Russian).

3. Chichura T.M., Lomovtsev A.E., Khozhainov A.Yu. Radiation hygienic monitoring and assessment of population doses in radioactively contaminated areas of Tula region. Radiatsionnaya Gygiena – Radiation Hygiene, 2016, vol. 9, no. 2, pp. 63-68. (In Russian).

4. Trapeznikov A., Aarkrog A., Pozolotina V., Nielsen S.P., Polikarpov G., Molchanova I., Karavaeva E., Yushkov P., Trapeznikova V., Kulikov N. Radioactive pollution of the Ob river system from Urals nuclear enterprise “Majak”. J. Environ. Radioact., 1994, vol. 25, no. 1-2, pp. 85-98.

5. Trapeznikov A.V., Korzhavin A.V., Trapeznikova V.N., Nikolkin V.N., Migunov V.I. Radioecological studies of the Ob-Irtysh river system on the territory of the Khanty-Mansi Autonomous Okrug. Voprosy radiatsionnoj bezopasnosti – Issues of Radiation Safety, 2009, Special issue 1, pp. 73-85. (In Russian).

6. Abdullaev S.F., Abdurasulova N.A., Nazarov B.I., Maslov V.A., Djuraev An.A., Djuraevв А.А., Madvaliev U., Davlatshoev T. Distribution of natural and technogenic radioactivity in samples of the dusty haze of the south of Tajikistan. Doklady AN Respubliki Tadzhikistan – Reports of the Academy of Sciences of the Republic of Tajikistan, 2011, vol. 54, no. 9, pp. 746-753. (In Russian).

7. Abdullaev S.F., Maslov V.A., Nazarov B.I., Madvaliev U., Davlatshoev T. Elemental composition of soils and dust aerosol in the south-central part of Tajikistan. Optika atmosfery i okeana – Atmospheric and Oceanic Optics, 2015, vol. 28, no. 3, pp. 246-255. (In Russian).

8. Nazarov B.I., Abdullaev S.F., Maslov V.A. Atmospheric aerosol of Central Asia. Dushanbe, Donish, 2017. 416 p. (In Russian).

9. Buriev N.N., Buriev N.T., Davlatshoev T. Technogenic radionuclide caesium-137 in food wild plants of Tajikistan. Simvol nauki – Symbol of Science, 2018, no. 4, pp. 7-8. (In Russian).

10. Abdullaev S.F., Maslov V.A., Rasulzoda Kh.Kh., Rakhmatov M.N. Elemental composition of atmospheric aerosol and soils of Tajikistan. Vestnik Tadzhikskogo nacional'nogo universiteta – Bulletin of the Tajik National University. Natural Sciences Series, 2018, no. 1, pp. 7-82. (In Russian).

11. Rakhmatov M.N. Study of the content of radioactive isotopes in the atmospheric aerosol and soils of Northern Tajikistan. Vestnik Tadzhikskogo nacional'nogo universiteta – Bulletin of the Tajik National University. Natural Sciences Series, 2022, no. 4, pp. 233-251. (In Russian).

12. Muminov S.V., Barotov B.B., Mirsaidov U.M., Murodov S.R., Salomov D.A., Mirsaidov I.U. Content of cesium-137 in the soil cover of Central and Southern Tajikistan. Radiatsionnaya Gygiena – Radiation Hygiene, 2021, vol. 14, no. 2, pp. 66-71. (In Russian).

13. Rakhmatov M.N. Investigation of the content of radioactive isotopes and heavy metals in soil and dust aerosol samples on the right bank of the Syr Darya within Khujand. Uchjonye zapiski Hudzhandskogo gosudarstvenogo universiteta – Scientific notes. The Natural and Economic Sciences, 2022, no. 2 (61), pp. 77-89. (In Russian).

14. GOST 17.4.3.01-2017. Nature protection. Soils. General requirement for sampling. Interstate standard. Moscow, Standartinform, 2018. 9 p. (In Russian).

15. Abdullaev S.F., Maslov V.A., Nazarov B.I., Kadirova Kh.I., Karieva R.A., Dzhuraev A.M., Davlatshoev T. Isotopic composition of dust aerosol in Tajikistan. Vestnik Tadzhikskogo nacional'nogo universiteta – Bulletin of the Tajik National University. Natural Sciences Series, 2017, no. 113, pp. 155-162. (In Russian).

16. National Program to Combat Desertification in Tajikistan. Dushanbe, 2000. 184p. (In Russian).

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