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Kebede Kassa, Messele, Tesfaye Deressu, Tilahun. (1402). Measurement of Natural Radioactivity Levels and Evaluation of Radiological Hazard Risks in Areas of Eastern Coastline Sediments of Lake Hawassa in Ethiopia’s Sidama Region. , 9(4), 1819-1837. doi: 10.22059/poll.2023.357027.1843
Messele Kebede Kassa; Tilahun Tesfaye Deressu. "Measurement of Natural Radioactivity Levels and Evaluation of Radiological Hazard Risks in Areas of Eastern Coastline Sediments of Lake Hawassa in Ethiopia’s Sidama Region". , 9, 4, 1402, 1819-1837. doi: 10.22059/poll.2023.357027.1843
Kebede Kassa, Messele, Tesfaye Deressu, Tilahun. (1402). 'Measurement of Natural Radioactivity Levels and Evaluation of Radiological Hazard Risks in Areas of Eastern Coastline Sediments of Lake Hawassa in Ethiopia’s Sidama Region', , 9(4), pp. 1819-1837. doi: 10.22059/poll.2023.357027.1843
Kebede Kassa, Messele, Tesfaye Deressu, Tilahun. Measurement of Natural Radioactivity Levels and Evaluation of Radiological Hazard Risks in Areas of Eastern Coastline Sediments of Lake Hawassa in Ethiopia’s Sidama Region. , 1402; 9(4): 1819-1837. doi: 10.22059/poll.2023.357027.1843

Measurement of Natural Radioactivity Levels and Evaluation of Radiological Hazard Risks in Areas of Eastern Coastline Sediments of Lake Hawassa in Ethiopia’s Sidama Region

Pollution
دوره 9، شماره 4، دی 2023، صفحه 1819-1837    اصل مقاله (1.55 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22059/poll.2023.357027.1843
نویسندگان
Messele Kebede Kassa* ؛ Tilahun Tesfaye Deressu
Department of Physics, Addis Ababa University, Arat Kilo Campus, Fax: +251-111-239768, P.O.Box: 1176, Addis Ababa, Ethiopia
چکیده
Natural radioactivity levels in the eastern coastline of Lake Hawassa sediment samples of Ethiopia’s Sidama Region have been measured. Sediment samples were collected and analyzed using gamma-ray spectrometery (high purity germanium detector) to evaluate the radioisotopes of 238U (214Pb, 214Bi), 232Th (228Ac, 212Pb), and 40K and their ranges of activity concentrations were 11.70 to 29.73 Bq 〖kg〗^(-1), 19.01 to 58.61 Bq 〖kg〗^(-1), and BDL to 827.21 Bq 〖kg〗^(-1) ,with average values of 16.51 ± 1.20 Bq 〖kg〗^(-1) , 28.17 ± 2.27 Bq 〖kg〗^(-1) ,and 673.95 ± 29.92 Bq 〖kg〗^(-1) (dry mass), respectively. The radiological hazard indices average values (radium equivalent (R_eq) (108.69 Bq 〖kg〗^(-1) ); hazard index (H_ex (0.29); excess lifetime cancer risk (ELCR) (0.23 x 〖10〗^(-3) ); absorbed dose rate (D_R) (52.70 nGyh^(-1) ); annual effective dose equivalent (AEDE) (0.07 mSv〖yr〗^(-1)); and annual gonadal dose equivalent (AGDE) (0.38 mSv〖yr〗^(-1)) were also evaluated and compared to the worldwide-recommended values. All results of radiological hazard indices obtained in this study were lower than their worldwide-recommended values were 370 Bq 〖kg〗^(-1), ≤1, 59 nGyh^(-1), 0.07mSv〖yr〗^(-1), 0.29 × 〖10〗^(-3), and 0.3mSv〖yr〗^(-1) of radium equivalent activity, external hazard index, outdoor absorbed dose rate, outdoor annual effective dose equivalent, excess lifetime cancer risk, and annual gonadal dose equivalent, respectively. This suggests the eastern coastline of Lake Hawassa is safe from radioactive risk for aquatic species and various human activities, and appears as essential radiometric baseline information for further environmental monitoring programs.
کلیدواژه‌ها
Sediment؛ Natural radioactivity؛ Radiological hazard index؛ Lake Hawassa Ethiopia
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