Natural Radionuclides Content in Granites from Operational Quarry Sites
Open Access
- 1 January 2019
- journal article
- research article
- Published by Scientific Research Publishing, Inc. in Detection
- Vol. 07 (01), 1-15
- https://doi.org/10.4236/detection.2019.71001
Abstract
Natural radionuclides content in granite from eight functional quarries in Osun State, Southwestern Nigeria was assessed. Eighty granite samples comprise ¾ inches. ½ inch and stone-dust were collected from Wolid, Slava, Ayofe, Espro, Ife/Modakeke, Krystal Vountein, Clario and Omidiran quarries in the State. Measurement was done using a high purity germanium (HPGe) detector. The statistical analysis was carried out using Statistical Package for Social Sciences (SPSS) software to determine if granite size has an impact on the activity concentrations. The results revealed that the mean activity concentrations of 238U (12.64 ± 1.89 Bq·kg -1) and 232Th (16.93 ± 2.46 Bq·kg -1) were highest in ¾ inch granite and lowest in stone-dust (5.01 ± 0.77 and 8.97 ± 1.37 Bq·kg -1 respectively), whereas 40K is highest in the ¾ inches (266.19 ± 35.53 Bq·kg -1) and lowest in ½ inches (151.85 ± 25.09 Bq·kg -1) granite. Espro has the highest (23.75 ± 3.74 Bq·kg -1) while Wolid has the lowest (4.11 ± 0.73 Bq·kg -1) 238U activity concentration and Slava has lowest for 232Th (8.21 ± 1.12 Bq·kg -1) and 40K (109.54 ± 11.06 Bq·kg -1). The radiological hazard parameters such as absorbed dose, annual effective dose radium equivalent, gamma index, external index, and internal index, were calculated to assess the radiation hazards associated with granite samples. The results obtained are lower than the recommended limits. The results were compared with the published data of other countries. Although, all the calculated radiation hazard indices were lower than the permissible limits. Therefore, people working in the quarries, granite end-users and the general public are safe from radiological health risks from the quarries, since there is no significant health hazard. The research will give reliable information on activity concentrations of natural radionuclides in granite rocks, contribute to a better understanding of radioactivity distribution in granite, and develop standards.Keywords
This publication has 18 references indexed in Scilit:
- Natural radioactivity and the resulting radiation doses in some kinds of commercially marble collected from different quarries and factories in EgyptNatural Science, 2011
- Assessment of Radiation Level Within and Around Stonebridge Quarry Site, Km 22 Lagos Ibadan Express Way, Southwest NigeriaEnvironmental Research Journal, 2010
- Radionuclide concentrations in soil and lifetime cancer risk due to gamma radioactivity in Kirklareli, TurkeyJournal of Environmental Radioactivity, 2009
- Natural radioactivity in common building construction and radiation shielding materialsAtmospheric Environment, 2008
- Determination of specific activity of 226Ra, 232Th and 40K for assessment of radiation hazards from Turkish pumice samplesJournal of Environmental Radioactivity, 2008
- Estimation of annual effective dose due to natural radioactive elements in ingestion of foodstuffs in tin mining area of Jos-Plateau, NigeriaJournal of Environmental Radioactivity, 2007
- Measurement of terrestrial radiation for assessment of gamma dose from cultivated and barren saline soils of Faisalabad in PakistanRadiation Measurements, 2006
- Gamma radiation measurements and dose rates in commercially-used natural tiling rocks (granites)Journal of Environmental Radioactivity, 2003
- Radioactivity in Everyday LifeJournal of Chemical Education, 1997
- Natural Radioactivity of Australian Building Materials, Industrial Wastes and By-productsHealth Physics, 1985