Measurement of Radon Concentration and Radioactivity in Soil Samples of Aramoko, Ekiti State, Nigeria

Ajiboye, Y and Badmus, O. G. and Ojo, O. D and Isinkaye, M. O (2016) Measurement of Radon Concentration and Radioactivity in Soil Samples of Aramoko, Ekiti State, Nigeria. International Journal of Public Health Research, 4 (5). pp. 37-41. ISSN 2381-4837

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Abstract

The radon concentration and natural radioactivity i n soil of Aramoko, Ekiti State, Nigeria have been d etermined. The soil gas radon measurement was performed in-situ with Rad7 r adon monitor coupled with a soil gas probe. Natural radioactivity measurement in soil samples was carried out using N aI(Tl) gamma spectrometer. This study is aimed at d etermining the correlation between the radioactivity of the soil a nd its radon concentration. It was found that the r adon concentration of soil gas in the study area ranged from 0.63BqL -1 to 35.04BqL -1 with an average value of 9.82±0.56BqL -1 . The average activity concentrations of 238 U, 232 Th and 40 K were found to be 22.62Bq/Kg, 34.74Bq/Kg and 316.7 2Bq/Kg, respectively. The average radium equivalent and average absorbed dose rates a t a height of 1m above the ground are 95.99±62 BqKg -1 and 45.18±27.28 nGyh -1 respectively. The mean external and internal hazar d indices were also found to be 0.26 and 0.32 respe ctively. All the determined radiological indices values are within t he recommended limits.

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