Radiation hazard in soil from Ajaokuta North-central Nigeria

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USIKALU M.R.; Rabiu A.B.; OYEYEMI K.D.; Achuka J.A.; Maaza M.

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Journal: International Journal of Radiation Research Year:2017 | Volume:15 | Issue:2 Page(s): 219-224

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Title

Radiation hazard in soil from Ajaokuta North-central Nigeria

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Keywords

Radiation hazard

gamma index

excess lifetime cancer risk

soil

Ajaokuta

Abstract

Background: Measurement of the radia on dose distribu on is important in assessing the health risk a popula on and serve as reference in documen ng changes to environmental radioac vity in soil due to man-made ac vi es. Materials and Methods: The ac vity concentra on of 238U, 232Th and 40K in soil samples obtained from different loca ons in Ajaokuta Local Government area was measured using Hyper Pure germanium Detec on System (HPGe). Results: The calculated average concentra on of the radionuclides ranged from 12 ± 1 Bqkg-1 to 59 ± 2 Bqkg-1 for 238U, 14 ± 1 Bqkg-1 to 78 ± 5 Bqkg-1 for 232Th and 49 ± 2 Bqkg-1 to 1272 ± 23 Bqkg-1 for 40K. In order to evaluate the radiological hazards due to natural radionuclides within Ajaokuta, the absorbed dose rate, gamma index, radium equivalent and excess life me cancer risk were es mated. According to measured data from the top soil (0-10 cm), the es mated radium equivalent (Raeq) ranges from 55. 7 Bqkg-1 at Steel Complex to 253. 3 Bqkg-1 obtained from Forest samples. Conclusion: The mean absorbed dose rate, annual effec ve dose and gamma radia on index evaluated were 66. 2 nGyh-1, 81. 2 μ Svy-1 and 1. 05 respec vely which are higher than the recommended limit for normal background radia on. Thus, we conclude that people living in these loca ons may be exposed to higher radia on.

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APA: Copy

USIKALU, M.R., Rabiu, A.B., OYEYEMI, K.D., Achuka, J.A., & Maaza, M.. (2017). Radiation hazard in soil from Ajaokuta North-central Nigeria. INTERNATIONAL JOURNAL OF RADIATION RESEARCH, 15(2), 219-224. SID. https://sid.ir/paper/286800/en

Vancouver: Copy

USIKALU M.R., Rabiu A.B., OYEYEMI K.D., Achuka J.A., Maaza M.. Radiation hazard in soil from Ajaokuta North-central Nigeria. INTERNATIONAL JOURNAL OF RADIATION RESEARCH[Internet]. 2017;15(2):219-224. Available from: https://sid.ir/paper/286800/en

IEEE: Copy

M.R. USIKALU, A.B. Rabiu, K.D. OYEYEMI, J.A. Achuka, and M. Maaza, “Radiation hazard in soil from Ajaokuta North-central Nigeria,” INTERNATIONAL JOURNAL OF RADIATION RESEARCH, vol. 15, no. 2, pp. 219–224, 2017, [Online]. Available: https://sid.ir/paper/286800/en

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