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Assessment of Radioactivity Concentration Level in Soil Samples of some Gold Mining Areas of Shiroro, Niger State, Nigeria |
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PP: 1-6 |
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doi:10.18576/jrna/070201
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Author(s) |
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Solomon Comfort Ladan,
Idris Mohammed Mustapha,
Abdullahi Hassan,
Mohammed Sidi Aliyu,
Sadiq Rahmat Tukur,
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Abstract |
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| The radiological effects of Gold mining in Shiroro, Niger state was estimated. A total of 30 soil samples were collected from various mining spots. The radio nuclides concentrations in the soil sample were measured using gamma spectroscopy method. The average values of 238U, 232𝑇ℎ 𝑎𝑛𝑑 40𝐾 obtained were 34.56 Bqkg-1, 28.79 Bqkg-1 and 230.44 Bqkg-1 respectively. These radioactivity concentration values obtained are lower than the world average value of 35 Bqkg-1 for 238U, 30 Bqkg-1 for 232𝑇ℎ, and 400 Bqkg-1 for 40𝐾 by UNSCEAR. The hazard indices and excess lifetime cancer risk were estimated using standard analytical methods. The mean values obtained for absorbed dose rate, internal hazard index, external hazard index, gamma indices, , radium equivalent, annual effective dose equivalent (indoor), annual effective dose (outdoor) and excess lifetime cancer risk respectively were 43.04 nGyh-1, 0.35, 0.25, 0.34, 93.47, 0.21 mSvyr-1, 0.05 mSvyr-1 and 0.184 respectively. The values when compared with the corresponding world recommended levels were found to be lower than the standard limit and as such, radiation exposure to the miners, those that process it and those that live very close to the study area may not pose significant health hazard to them. |
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