Natural Radionuclide Concentration and Radiological Impact Assessment of Soil and Water from Dadinkowa Dam, Northeast Nigeria.
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Date
2017-07-16
Journal Title
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Publisher
Journal of the Nigerian Association of Mathematical Physics
Abstract
Radioactivity measurement of water and sediment samples from Dadinkowa dam, Gombe, Nigeria was carried out using a lead-shielded “76mm×76mm˝ Sodium iodide [NaI(TI)] detector connected to ORTEC 456 amplifier. The obtained gamma resultswere used to estimate some radiological impact parameters in order to effectively ascertain the level of the radiological health hazard to humankind by the use of such materials in the study area. The mean absorbed dose rates for the sediment and water samples were 66.09 and 39.01 nGy h-1, respectively while the mean Annual Effective Dose (AEDE) for the ingested radionuclide in water samples from the area for infants, 1 year, 5 years, 10 years, 15 years and adults were 0.00276, 0.00313, 0.00197, 0.00135, 0.00117, and 0.00187 Sv/y, respectively.The mean AEDEoutdoor for the sediments was 0.0809 mSv/y and mean AEDEindoor was 0.324 mSv/y.Similarly,the mean Radium Equivalent Activity Index (Raeq) for the sediment and water samples was 139.83 Bq kg-1 and 30.84 Bq/L respectively, while the mean estimated internal and external hazard indices for the sediment samples were 0.52 and 0.37, respectively and that of water samples were 0.13 and 0.09, respectively. Furthermore, the estimated mean values for the AGED in the sediment and water were 458.49 and 104.60 μSv/y respectivelywhilethe estimated mean Iγfor the sediment and water samples were 1.030 and 0.229 mSv/y, respectively.Conclusively, the estimated mean the Excess Lifetime Cancer Risk (ELCR) for the sediment sample was 0.280 x 10-3 while that of water samples were 9.66, 10.96, 6.90, 4.73, 4.10 and 6.58 10-3 for 1 year, 5 years, 10 years, 15 years and adults, respectively. The results showed trends that were generally low for most of the radiological impact parameters calculated except for few indices whose values were above the UNSCEAR recommended thresholds. Therefore, there may be no serious immediate radiological effects to the populace and the environment in this area
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Keywords
Radioactivity, Soil, Water, Radiological Impact, Dadinkowa dam
Citation
Orosun. M. M, Lawal T. O., Ezike S. C., Salawu N. B., Atolagbe B. M., Akinyose. F. C, Ige S. O., and Martins G. (2017): Natural radionuclide concentration and radiological impact assessment of soil and water from Dadinkowa Dam, Northeast Nigeria. Journal of the Nigerian Association of Mathematical Physics. 42 (1): 307 – 316..