Natural Radioactivity Levels and Estimation of Radiation Exposure in Agricultural Soils from Skopje City Region
| Autor: | Radmila Crceva-Nikolovska, Zehra Hajrulai-Musliu, Aleksandra Angjeleska, Boško Boškovski, Elizabeta Dimitrieska-Stojkovic |
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| Rok vydání: | 2020 |
| Předmět: |
Soil test
natural radioactivity soil gamma spectrometry activity concentrations radiological risks General Chemical Engineering 0208 environmental biotechnology Population chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Effective dose (radiation) lcsh:Biochemistry Radium lcsh:QD415-436 lcsh:Chemical engineering education Natural radioactivity 0105 earth and related environmental sciences education.field_of_study Radionuclide lcsh:TP155-156 General Chemistry 020801 environmental engineering Radiation exposure chemistry Environmental chemistry Soil water Environmental science |
| Zdroj: | Macedonian Journal of Chemistry and Chemical Engineering, Vol 39, Iss 1, Pp 77-87 (2020) |
| ISSN: | 1857-5625 1857-5552 |
| Popis: | The aim of this study was to determine the activity concentrations of naturally occurring radioisotopes 226 Ra, 232 Th and 40 K in 14 soil samples collected in the Skopje city surrounding, and to calculate the corresponding absorbed gamma dose rates. The radionuclides were measured applying a high purity Ge detector gamma-ray spectrometer with relative efficiency of 30 % at 1.33 MeV. The activity concentrations found in 14 soil samples varied in the range 24.1-41.9 Bq kg -1 for 226 Ra, 38.5-52.2 Bq kg -1 for 232 Th, and 502-707 Bq kg -1 for 40 K. The mean radium equivalent (Ra eq ), for the area under investigation, was 143±16 Bq kg -1 , while the outdoor radiation hazard index ( H ex ) was 0.39. The total absorbed dose rate due to three primordial radionuclides investigated lay in the range 55.3 - 79.0 nGy h -1 with mean value of 68.1±7.7 nGy h -1 , yielding a total annual effective dose of (83.5±9.5) µSv y -1 . The assessed radiological factors were lower than the recommended values, indicating low radiological health risk for the population living and working in the investigated area. The activity concentrations of radionuclides in soil samples were compared to the international values reported by United Nations Scientific Committee on the Effects of Atomic Radiation and previous studies on geographically close areas and some worldwide regions. |
| Databáze: | OpenAIRE |
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