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Determination of Radionuclide Concentrations and Hazard Indices of Water, Fish and Sediment in Eko-Ende Dam, Ifelodun Local Government Area, Osun, Nigeria |
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PP: 55-60 |
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doi:10.18576/jrna/050108
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Author(s) |
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K. T. Ogundele,
E. A. Oluyemi,
J. A. O. Oyekunle,
O. W. Makinde,
S. T. Gbenu,
O.G. Fadodun,
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Abstract |
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| The radionuclide concentrations in sediments, water and fishes (Oreochromis niloticus and Chrysichthys auratus) of Eko-Ende Dam situated in Ifelodun Local Government Area, Osun State were analyzed using the (NaI) gamma-ray spectrophotometer and from the activity concentrations, their radiological health hazard indices were evaluated. The results of the samples taken between November 2013 and October 2014 were analyzed. The mean activity concentrations due to 40K in the sediment, water and fish (Oreochromis niloticus and Chrysichthys auratus) was 902.64 ± 15.15, 390.63 ± 11.78 and 162.45 ± 11.36 and 136.87 ± 10.64 Bq/kg respectively. 238U had a mean value of 34.55 ± 4.16 in the sediment, 36.73 ± 4.93 in the water samples, and 34.04 ± 5.26 and 28.77 ± 4.80 Bq/kg in Oreochromis niloticus and Chrysichthys auratus (fish) respectively while 232Th presented a mean value of 41.29 ± 5.53 in the sediment, 36.73 ± 4.93 in water and 26.55 ± 4.77 and 21.52 ± 3.37 Bq/kg in fish samples. The mean activity concentrations of sediment and water were higher than the permissible values while in fish samples the values were below the permissible values. The health hazard indices, radium equivalent activity (Raeq), annual effective dose equivalent and the excess lifetime cancer risk (ELCR) were below the permissible limit in the water and fish samples whereas, in the sediment samples the values were far above the permissible values.
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