Analysis of Natural Radioactivity and Radiological Hazards in Soil Samples from The Western Ghats, India
DOI:
https://doi.org/10.53555/5ecbqr51Abstract
This study took soil samples from the Agumbe region in the Western Ghats of Karnataka, India, and studied its natural radioactivity. To evaluate the native radiation levels in this ecologically delicate region, high-resolution gamma spectrometry was used to determine the activity concentrations of naturally occurring radionuclides Ra-226, Th-232, and K-40. We chose Agumbe because of its varied heights and rainfall patterns, in addition to its tropical climate and abundant biodiversity. The gamma spectrometry analysis of soil samples taken from uphill, downhill, and mid-hill sites showed that the radioactive concentrations varied across the various topographies. Ra-226, Th-232, and K-40 concentrations were generally within the global norms, with minor differences explained by regional topographical and geological factors. Environmental monitoring programs and radiological health evaluations can benefit from the study's findings regarding the region's radioactive baseline. Additionally, future research on radiation exposure in environmentally sensitive regions can use this information to support environmentally conscious management practices.
References
1. Amaral, E. C. S., Rochedo, E. R. R., Paretzke, H. G. and Franca, E. P. The radiological impact of agricultural activities in an area of high natural radioactivity. In: The Natural Radiation Environment IV. Radiation Protection Dosimetry, 45(1–2), pp. 289–292, 1992.
2. Anagnostakis, M. J., Hinis, E. P., Simopoulos, S. E. and Angelopoulos, M. G. Natural radioactivity mapping of Greek surface soils. In: The Natural Radiation Environment IV (Philip K. Hopke, Ed.), Environmental International, 22(Suppl 1), pp. 3–8, 1996.
3. Baeza, A., del Rio, M., Miro, C. and Paniagua, M. Natural radioactivity in soils of the province of Caceres (Spain). In: The Natural Radiation Environment IV. Radiation Protection Dosimetry, 45(1–2), pp. 261–263, 1992.
4. Bellia, S., Brai, M., Hauser, S., Puccio, P. and Rizzo, S. Natural radioactivity in a volcanic island Ustica, southern Italy. Applied Radiation and Isotopes, 48(2), pp. 287–293, 1997.
5. Bettencourt Antonio, O., Maria, Teixeua, M.G.R., Maria, D. T., Elias and Maria C. Faisca. Soil to plant transfer of Ra-226. Journal of Environmental Radioactivity, 6, pp. 49–60, 1988b.
6. Bortoli, D. E. M. and Gaglione, P. 226Ra in environmental materials and food. Health Physics, 22, pp. 43–48, 1972.
7. Chung-Keung Man, Shun-Yin Lau, Shui-Chun Au, and Wai-Kwok Ng. Radionuclides in building materials used in Hong Kong. Health Physics, 57(3), pp. 397–401, 1987.
8. Delaune, R. D., Jones, G. L. and Smith, C. J. Radionuclide concentration in Louisiana soils and sediments. Health Physics, 51(2), pp. 239–244, 1986.
9. Djuric, Gordana, Dragana Popovic and Dragana Todorovic. Activity variations and concentration factors for natural radionuclides in a soil-plant-honey system. In: The Natural Radiation Environment IV (Philip K. Hopke, Ed.), Environmental International, 22(Suppl 1), pp. 361–363, 1996.
10. Drichko, V. F., Krisyuk, B. E., Travnikova, I. G., Lisachenko, E. P. and Dubenskaya, M. A. Frequency distribution of radium-226, thorium-228, and potassium-40 concentrations in various soils. Soviet Soil Science, 9(5), pp. 593–598, 1977.
11. Eisenbud, M. Environmental Radioactivity from Natural, Industrial and Military Sources, 3rd Ed., Academic Press Inc., California, 1987.
12. EML Procedure Manual. Edited by Herbert L. Volchok and Gail de Planque. 26th Ed., Environmental Measurement Laboratory, 1983.
13. Faul. H. Nuclear Geology. Wiley, New York, 1954.
14. Fernandez-Aldecoa, J. C., Robayna, B., Allende, A., Poffijn, A. and Hernandez Armas. Natural radiation in Tenerife (Canary Islands). In: The Natural Radiation Environment IV. Radiation Protection Dosimetry, 45(1–2), pp. 545–548, 1992.
15. Florou, H. and Kritidis, P. Gamma radiation measurements and dose rate in the coastal areas of a volcanic island, Aegean Sea, Greece. In: The Natural Radiation Environment IV. Radiation Protection Dosimetry, 45(1–2), pp. 277–279, 1992.
16. Holm, E. C., Samulsson, and Persson, B. R. R. Natural radioactivity around a prospected uranium mining site in a subarctic environment. In: Natural Radiation Environment (Proc. 2nd Special Symp. Bombay, Vohra, K. G., Mishra, U. C., Pillai, K. C. and Sadasivan, S., Eds.), Wiley Eastern Ltd., New Delhi, pp. 85–92, 1982.
17. Holtzman, R. B. Natural levels of Pb-210, Po-210 and Ra-226 in humans and biota of the Arctic. Nature, 210, pp. 1094–1097, 1966.
18. IAEA/RCA. Regional workshop on environmental sampling and measurement of radioactivity for monitoring purposes. Kalpakkam, Oct 9–12, pp. 85–92, 1989.
19. Ibrahiem, N. M., Abd, E. I., Ghani, A. H., Shawky, S. M., Ashrof, E. M. and Farouk, M. A. Measurement of radioactivity levels in soil in Nile Delta and Middle Egypt. Health Physics, 64(6), pp. 620–627, 1993.
20. Iyengar, M. A. R. The natural distribution of radium. In: The Environmental Behaviour of Radium, Technical Series No. 310, Vol. 1, International Atomic Energy Agency, Vienna, 1990.
21. Iyengar, M. A. R., Rajan, M. P., Ganapath, Y. S. and Kamath, P. R. Sources of natural radiation exposure in a low monazite environment. In: Natural Radiation Environment III (Proc. Int. Conf. Houston, 1978, Gesell, T. F. and Lowder, W. M., Eds.), Vol. 2, CONF-780422, Technical Information Centre, USDOE, Oak Ridge, TN, pp. 1090–1106, 1980.
22. Kamath, P. R., Khan, A. A., Rao, S. R., Pillai, T. N., Bhorkar, M. L. and Ganapathy, S. In: The Natural Radiation Environment, Rice University, pp. 957, 1964a.
23. Kamath, P. R., Khan, A. A., Rao, S. R., Pillai, T. N., Bhorkar, M. L. and Ganapathy, S. In: The Natural Radiation Environment I (Adams J. A. S. and Lowder, W. M., Eds.), University of Chicago Press, pp. 837–854, 1964b.
24. Kamath, R. R., Menon, M. R., Shukla, V. K., Sadasivan, S. and Nambi, K. S. V. Natural and fallout radioactivity measurement of Indian soils by gamma spectrometric technique. In: Fifth National Symposium on Environment (Sastry, V. N., Bapat, V. N. and Desai, M. V. M., Eds.), VECC and SINP, Calcutta, India, Feb. 28–Mar. 1, pp. 56–60, 1996.
25. Kapoor and Ramamurthy, S. S. Nuclear Radiation Detectors, Wiley Eastern Ltd., 1986