Iranian Journal of Medical Physics

Iranian Journal of Medical Physics

Natural Radionuclides And Potential Radiological Hazard Associated with Consumption of Water, Oreochromis niloticus and Chrysichthys nigrodigitatus from Ero Dam, Ekiti, Nigeria

Document Type : Original Paper

Authors
Margaret Bose Adedokun 1
Olusola Olurotimi Oyebola 1
Ayo Zacchaeus Ibitoye 2
Jamiu Adelakin Akinade 3
1 Department of Physics University of Lagos Akoka
2 Dept. of Radiation Biology and Radiotherapy College of Medicine, University of Lagos, Idi-Araba, Lagos, Nigeria
3 Department of Physics, Faculty of Science, University of Lagos
10.22038/ijmp.2023.70728.2249
Abstract
Introduction: This study aims to evaluate the potential radiological hazard associated with the consumption of water and fish products from Ero Dam.
Material and Methods: The activity concentrations of 238U, 232Th and 40K in the samples were determined using gamma ray spectrometry.
Results: Mean activity concentrations of 238U, 232Th and 40K in water were 8.49 1.38, 4.12 0.40 and 150.99 10.80 Bq/l respectively. In Oreochromis niloticus and Chrysichthys nigrodigitatus mean specific activity were 23.17 7.25, 14.25 , 740.86  Bq/kg and 77.92 , 16.26 1.63, 842.90  Bq/kg respectively. Average annual effective dose for water (Hw) was 1.58 mSv/yr and for fish edible tissue (Hf) 0.16 mSv/yr. Mean concentrations of 232Th and 40K in water are 312% and 1400% higher than guidance levels and mean specific activity for 238U and 232Th in fish were about three orders of magnitude higher than reference values. Mean Hw is about 1500% higher than the reference level and the average Hf for fish is 540% higher than the recommended Hf for natural radionuclides in fish products. Mean ELCR from consumption of water, Oreochromis and Chrysichthys are 1900%, 62% and 131% higher than the world’s average value from carcinogens respectively.
Conclusion: Continuous consumption of water and fish products from Ero Dam is associated with potential radiation risks.
Keywords
Excess Life Cancer Risk
Annual Effective Ingestion Dose
Water
Fish
Gamma Spectrometry
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Iranian Journal of Medical Physics
Volume 21, Issue 3 - Serial Number 3
May and June 2024
Pages 138-146

  • Receive Date 21 February 2023
  • Revise Date 12 May 2023
  • Accept Date 16 May 2023