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Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria
The distribution of natural radioactivity levels of (238)U, (232)Th, and (40)K in soils overlying the 3 lithologic units within Obafemi Awolowo University, Ile-Ife, Nigeria was investigated to characterize the gamma radiation dose distribution over the lithologies and to assess the radiation hazard...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
SAGE Publications
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9134001/ https://www.ncbi.nlm.nih.gov/pubmed/35645568 http://dx.doi.org/10.1177/11786302221100041 |
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author | Esan, Deborah T Ajiboye, Yinka Obed, Rachel I Ojo, Joshua Adeola, Mary Sridhar, Mynepalli K |
author_facet | Esan, Deborah T Ajiboye, Yinka Obed, Rachel I Ojo, Joshua Adeola, Mary Sridhar, Mynepalli K |
author_sort | Esan, Deborah T |
collection | PubMed |
description | The distribution of natural radioactivity levels of (238)U, (232)Th, and (40)K in soils overlying the 3 lithologic units within Obafemi Awolowo University, Ile-Ife, Nigeria was investigated to characterize the gamma radiation dose distribution over the lithologies and to assess the radiation hazard due to the natural radionuclides. A thallium-doped cesium iodide detector was employed to determine the activity concentrations of (238)U, (232)Th, and (40)K in 21 soil samples. The respective average concentrations of the 3 radionuclides are 37.7, 3.2, and 245.6 Bq kg(−1) for granite gneiss, 31.9, 2.8, and 241.1 Bq kg(−1) for banded gneiss, and 21.1, 1.7, and 196.7 Bq kg(−1) for mica schist. The average concentration of (238)U in granite gneiss lithology exceeds the world average value. The evaluated values of radiation hazard parameters including average absorbed dose rate, outdoor annual effective dose and external hazard index are below the recommended limits. The spatial distribution of the radiation hazard parameters evaluated over the lithologies has been delineated. The highest average cancer risk of 1.15 per 10 000 population was obtained for the study area within the soil overlying the banded gneiss lithology. Generally, the radiation hazard from the soils in study area poses no significant health hazard. |
format | Online Article Text |
id | pubmed-9134001 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | SAGE Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-91340012022-05-27 Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria Esan, Deborah T Ajiboye, Yinka Obed, Rachel I Ojo, Joshua Adeola, Mary Sridhar, Mynepalli K Environ Health Insights Ecological Public Health The distribution of natural radioactivity levels of (238)U, (232)Th, and (40)K in soils overlying the 3 lithologic units within Obafemi Awolowo University, Ile-Ife, Nigeria was investigated to characterize the gamma radiation dose distribution over the lithologies and to assess the radiation hazard due to the natural radionuclides. A thallium-doped cesium iodide detector was employed to determine the activity concentrations of (238)U, (232)Th, and (40)K in 21 soil samples. The respective average concentrations of the 3 radionuclides are 37.7, 3.2, and 245.6 Bq kg(−1) for granite gneiss, 31.9, 2.8, and 241.1 Bq kg(−1) for banded gneiss, and 21.1, 1.7, and 196.7 Bq kg(−1) for mica schist. The average concentration of (238)U in granite gneiss lithology exceeds the world average value. The evaluated values of radiation hazard parameters including average absorbed dose rate, outdoor annual effective dose and external hazard index are below the recommended limits. The spatial distribution of the radiation hazard parameters evaluated over the lithologies has been delineated. The highest average cancer risk of 1.15 per 10 000 population was obtained for the study area within the soil overlying the banded gneiss lithology. Generally, the radiation hazard from the soils in study area poses no significant health hazard. SAGE Publications 2022-05-23 /pmc/articles/PMC9134001/ /pubmed/35645568 http://dx.doi.org/10.1177/11786302221100041 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by-nc/4.0/This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage). |
spellingShingle | Ecological Public Health Esan, Deborah T Ajiboye, Yinka Obed, Rachel I Ojo, Joshua Adeola, Mary Sridhar, Mynepalli K Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria |
title | Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria |
title_full | Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria |
title_fullStr | Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria |
title_full_unstemmed | Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria |
title_short | Measurement of Natural Radioactivity and Assessment of Radiological Hazard Indices of Soil Over the Lithologic Units in Ile-Ife Area, South-West Nigeria |
title_sort | measurement of natural radioactivity and assessment of radiological hazard indices of soil over the lithologic units in ile-ife area, south-west nigeria |
topic | Ecological Public Health |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9134001/ https://www.ncbi.nlm.nih.gov/pubmed/35645568 http://dx.doi.org/10.1177/11786302221100041 |
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