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  • 标题:Evaluation of Naturally Occurring RadionuclideMaterials in Soil Samples Collected From SomeMining Sites in Zamfara State, Nigeria
  • 本地全文:下载
  • 作者:A. J. Innocent ; M. Y. Onimisi ; S. A. Jonah
  • 期刊名称:Current Journal of Applied Science and Technology
  • 印刷版ISSN:2457-1024
  • 出版年度:2013
  • 卷号:3
  • 期号:4
  • 页码:684-692
  • 语种:English
  • 出版社:Sciencedomain International
  • 摘要:Aims: To identify and quantify prominent gamma emitting-NORMs associated with mining activities in Zamfara State, Nigeria.Study Design: Soil samples were collected from 10 different mine sites in Zamfara State, northwest-Nigeria for gamma spectroscopy analysis.Place and Duration of Study: Department of Physics, Nigerian Defence Academy Kaduna, Nigeria, between June 2012 and October 2012.Methodology: A laboratory based γ-ray spectrometry NaI(Tl) at the Centre for Energy Research and Training (CERT), Ahmadu Bello University Zaria, Nigeria was employed to carry out the analysis of the soil samples.Results: The values of activity concentration found for 40K, 238U and 232Th range from 227.10±7.54 – 590.44±10.57, 4.68±3.52 – 18.98±0.84 and 40.58±1.85 – 94.92±2.75 Bq.kg-1 respectively, while absorbed dose rate in the soil samples for 40K, 238U and 232Th range from 9.47±0.31 – 24.62±0.44, 2.16±1.62 – 8.77±0.39 and 24.51±1.12 – 57.33±1.66 nGy.h-1 respectively. The total average absorbed dose rate of the soil samples collected is 59.70 nGy.h-1 and the estimated annual effective dose for the study areas range from 52 – 106 μSv.y-1, with an average annual effective dose of 73 μSv.y-1.Conclusion: The radiation exposure level for members of the public in the study areas is within the safety limit.
  • 关键词:Radionuclides;soil;mining;activity concentration;absorbed dose;Zamfara
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