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Research Journal of Physics
  Year: 2012 | Volume: 6 | Issue: 2 | Page No.: 59-65
DOI: 10.3923/rjp.2012.59.65
Measurement of Gamma Radioactivity Level in Bedrocks and Soils of Quarry Sites in Ogun State, South-Western, Nigeria
A.S. Okedeyi, A.M. Gbadebo, T.A. Arowolo and A.O. Mustapha

Abstract:
The abundance of crystalline rocks in Ogun State has resulted in increasing number of quarry activities and sites. These rocks which have been observed to be rich in Naturally Occurring Radionuclides (NOR) are the primary terrestrial sources of radiation in the environment. This study measured the gamma radioactivity level in bedrocks and soils of quarry sites in Ogun State, South-Western, Nigeria. Measurements of radiation were made randomly at 10 locations in each of the 20 quarry sites using fluke-victoreen ASM-990 survey meter. The measured dose rates above the bedrocks and soils of the quarries ranged from 2.3-19.4 and 2.7-19.4 nGy h-1 which corresponding to annual effective dose ranges of 2.60-23.81 and 3.31-22.30 μSv y-1, respectively using occupancy factor. Similarly, the result of linear regression between the measured absorbed dose rate on top of the bedrocks and top of the soils in the 20 quarry sites revealed that there is a strong positive correlation (R2 = 0.80) which implies that, the radiation from the soil of the study area are derived from the underlying rocks. The mean absorbed doses of this study were low compared to values from other studies and world recommended value of 70 μSv y-1. However, no matter how low, all levels of ionizing radiation are hazardous to human health. Hence, there will be need for continuous monitoring of the radiation level in and around the quarry sites.
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 RELATED ARTICLES:
  •    Natural Radionuclides Distribution in the Granitic Rocks and Soils of Abandoned Quarry Sites, Abeokuta, Southwestern Nigeria
How to cite this article:

A.S. Okedeyi, A.M. Gbadebo, T.A. Arowolo and A.O. Mustapha, 2012. Measurement of Gamma Radioactivity Level in Bedrocks and Soils of Quarry Sites in Ogun State, South-Western, Nigeria. Research Journal of Physics, 6: 59-65.

DOI: 10.3923/rjp.2012.59.65

URL: https://scialert.net/abstract/?doi=rjp.2012.59.65

 
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