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Radio activity and radiological hazards from a kaolinmining field in Ifonyintedo,Nigeria

Adagunodo, T. A. and George, A.I. and Ojoawo, I. A. and Ojesanmic, K. and Ravisankar, R. (2018) Radio activity and radiological hazards from a kaolinmining field in Ifonyintedo,Nigeria. MethodsX, 5. pp. 362-374.

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The concentrations of the radio nuclides in the subsurface formation (soilsandrocks) solely depend on their geological origin, which enables its variation from point to point on the Crust.Construction materials can possess elevated concentrations of radio activity if their by products are mined from contaminated radio nuclide sources.In this article, results of insitu measurements of radio activity concentrations of 40K, 232Th, and 238U as well as gamma doses and radiological hazards from kaolin mining field were presented and evaluated.Eleven stations were randomly occupied in order to cover the upper axis of akaolin mining field in Ifonyintedo.The radio metric survey was achieved using Super-Spec(RS-125), equipment capable of measuring activity concentrations and gamma doses. For each location, measurements were taken four times, while its mean and standard deviation values were estimated for better accuracy. The over all mean activity concentrations(for 40K, 232Th and 238U) and gamma dose were estimated as 93. 9Bqkg�1, 65.1Bqkg�1, 38.2Bqkg�1, and59.6nGyh�1 respectively.The estimated radiological hazards from the measured parameters showed that the overall mean concentrations of Radium Equivalent, External and Internal Hazards,Annual Effective Dose,Gamma and Alpha Indices,and Representative Level index are 138.5Bqkg �1, 0.370.48, 0.29mSvyr�1, 0.48,0.19, and 0.97respectively.By comparing the mean values of the activity concentrations and their radiological risks with the several world standards from the literature, kaolin deposits in Ifonyintedo are highly rich in thorium.

Item Type: Article
Uncontrolled Keywords: Kaolin, Ceramic raw materials, Ifonyintedo ,DahomeyBasin, Radioactivity, Radiological hazards,Miners
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 02 May 2018 08:05
Last Modified: 22 Aug 2018 09:23

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