:: Volume 20, Issue 3 (7-2022) ::
Int J Radiat Res 2022, 20(3): 671-678 Back to browse issues page
Evaluation of activity concentration of natural radionuclides and lifetime cancer risk in soil samples at two tertiary institutions in Owerri, Imo State, Nigeria
B.C. Eke, U.M. Ukewuihe, I.R. Akomolafe
Department of Physical Sciences, Faculty of Natural Science, Redeemer's University, Ede, Nigeria , idowurakomolafe@gmail.com
Abstract:   (268 Views)
Background: Environmental radioactivity measurement of soil samples from the densely populated community has become imperative considering the radiological exposure associated with primordial radionuclides. Materials and Method: Sixty soil samples were collected at different locations within Alvan Ikoku Federal College of Education (AIFCE) and Federal Polytechnic Nekede (FPN), Owerri. Radioactivity measurements were carried out by the method of gamma-ray spectrometry with thallium doped sodium iodide [NaI(Tl)] detector. Results: The mean activity concentrations of 88.41±1.51, 20.69±3.56 and 25.04±0.71 Bqkg-1 for 40K, 226Ra and 232Th, respectively, were obtained in soil samples of AIFCE, while 92.97±1.50, 20.48±3.21 and 22.36±0.70 Bqkg-1 for 40K, 226Ra and 232Th, respectively, were obtained in soil samples of FPN. These values are below the average world value of 420, 32 and 45 Bqkg-1 for 40K, 226Ra and 232Th, respectively, as recorded in UNSCEAR 2000 report. The calculated absorbed dose, annual effective dose and other radiological hazard indices were below the recommended safe limit. The mean calculated values of the excess lifetime cancer risk for AIFCE and FPN are 0.12±0.03 and 0.11±0.03, respectively. Conclusion: Based on the results from the present study, it is evidence that the activity concentrations and other radiological parameters are within the world’s safe limit, indicating that soil samples from the AIFCE and FPN, Owerri are free from radioactive contamination and do not pose a threat to the two communities.
Keywords: Radiological risks, natural radioactivity, soil samples, Nigeria.
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Type of Study: Original Research | Subject: Radiation Biology

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