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Radiological Assay of Technologically Enhanced Naturally Occurring Radionuclides and Hazard Assessment in Soil Samples from Selected Towns in Kogi state, Nigeri |
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PP: 17-21 |
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doi:10.18576/jrna/020103
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Author(s) |
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S. T. Yinusa,
F. S. Olise,
S. T. Gbenu,
M. I. Arowojolu,
M. K. Ajekiigbe,
S. A. Adeojo,
H. B. Olaniyi,
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Abstract |
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| Extraction of certain minerals from the earth crust results in technologically enhanced naturally occurring radionuclides, which may pose danger to immediate environment. The activity concentrations of naturally occurring radionuclides 40K, 238U and 232Th in soil samples from selected towns in Kogi State were measured using gamma spectrometry with NaI (Tl) detector. This was with a view to determine the radiological hazards due to these natural radionuclides. The total average activity concentrations of 40K, 238U and 232Th determined in the study area were 974.7±6.8, 74.3±5.0 and 110.3±24.8 Bq/kg, respectively. The mean annual effective dose, the mean radium equivalent activity concentration, the mean external and internal hazard indices in the study area were less than the permissible limit set by international community. Therefore, mining activities in selected towns in Kogi State poses no radiological hazard to both the miners and populace of the study area. |
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