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Determination of Activity Concentration and Radiotoxicity of Some Radionuclides in Gold Mining Area of Galadima Kogo in Niger State, Nigeria |
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PP: 213-219 |
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doi:10.18576/jrna/090302
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Author(s) |
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Saba D. Ibrahim,
Samson D. Yusuf,
Ibrahim Umaru,
Idris M. Mustapha,
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Abstract |
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| This study is aimed at determining the activity concentration and radiotoxicity of some radionuclides in the Gold mining area of Galadima Kogo in Niger State, Nigeria. A total of thirty soil samples were collected from the gold mining sites and were subjected to Gamma Spectroscopy analysis using a NaI(Tl) detector. The activity of 238U, 232Th, and 238U ranged from 17.3±6.1Bq/kg to 51.4±5.1Bq/kg with mean value of 34.563±6.8 Bq/kg, 11.2±4.1 Bq/kg to 45.0±1.3 Bq/kg with mean value of 28.79±7.2 Bq/kg, 98.3±6.1 Bq/kg to 498.4±7.2 Bq/kg with mean value of 230.4±9.4 Bq/kg respectively. The mean gamma dose rate, radium equivalent activity, external hazard indices, annual effective dose rate, annual gonadal dose rate, excess life cancer risk, and annual gonadal dose equivalent are 43.445 nGy/h, 93.477 Bq/kg, 0.252 mSv/y, 0.053 mSv/y, 0.186, and 299.502 respectively. These indicate that the hazards associated with natural radionuclides in the mining areas are lower than the worldwide average and UNSCEAR recommended limits. The AEDE calculated is lower than the ICRP recommended limit for public exposure. It is therefore concluded that the mining activities in the Galadima Kogo area of Niger State do not pose significant radiological hazard to the host communities. |
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