Radiation Doses and Risk Assessment Due to Water Intake at Oyo Town, Southwestern Nigeria
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Abstract
From the long standing nature of water usage, water has been has had a significant impact to all great development. Potable water has been recognized as the water intended for human consumption for the purpose of research and other human activities. Therefore, the World Health Organization (WHO) classified 230Th, 226Ra, 210Pb, 210Po, 232Th, 228Ra, 40 K and 228Th as naturally occurring radionuclide contaminants in water and a possible threat to human existence. This work evaluated the activity concentration of natural radionuclide in ground water, examine radiation doses and the threat due to water intake from Oyo town using a 5 cm × 5 cm solid NaI(Tl) gamma-ray spectrometric manufactured by ORTEC and coupled to a Digital-based multi-channel analyzer (MCA). From the results, 92.5 per percent of 40K, 87.5 per cent of 226Ra and 95 of 232Th was greater than the IAEA safe limit of 1.00 Bql−1limit. The average value of an annual effective dose for adults was 0.17±0.06 mSvy−1 and 0.43±0.17 mSvy−1 for children. Cancer risk assessment was obtained to 2.98 x 10−3 compared to ICRP recommended value of 8.4 × 10−3. Health risk implication resulting from consumption of water from the study area poses no health concern, no artificial radionuclide was detected and the chance of cancer occurrence resulting from drinking water from the study area is stochastic. It is recommended that caution should be taken on the fertilizer application on the farm land. Further research is recommended on the radioactivity measure of the soil and food crops grown in the study area.
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Akanbi, O.A., Falana O.A. and Gabriel S. (2022). Hydrogeochemical study of Shallow Groundwater of Oyo Town Southwestern Nigeria. Ajayi Crowther J. Pure Appl. Sci. 2022, 1(1), 1-9. DOI:10.56534/acjpas.2022.01.01.9
Awodugba, A.O., Tchokossa, P. (2008). Assessment of Radionuclide Concentrations in Water Supply from Bore-holes in Ogbomosoland, Western Nigeria. Indoor Built Environ. ;17; 2:183–186. DOI: 10.1177/1420326X08089551
Damatto, D. S. M. and Ulrich, J. C. (2020). Natural radionuclides 226Ra, 228Ra, 210Pb and 210Po and inorganic chemical elements determined in mineral waters from Aguas de Contendas and Lambari, Brazil. Journal of Radioanalytical and Nuclear Chemistry, 326, 51–63. https://doi.org/10.1007/s10967-020-07357-5
IAEA. (2004). Application of the concepts of exclusion, exemption and clearance in safety standards series No. RS-G-1.7
ICRP. (1999). Protection of the public in situations of prolonged radiation exposure. ICRP Publication 82. Ann. ICRP 29 (1–2).
ICRP. (2007). Recommendations of the international commission on radiological protection.
ICRP Publication 103, Annals of the ICRP. Oxford: Pergamon Press. ICRP. (2010). Conversion coefficients for radiological protection quantities for external radiation exposures. ICRP Publication 116, Ann ICRP 40 (2–5). Oxford, UK.
Israel O.K. , Olotu A.A. , Idowu A. , Ojewuyi A.R. , Odusan M.O. and Adeniji O.A (2023). Biologic quality of households' drinking-water in an urban local government area of Oyo State, Southwest, Nigeria. Res. J. Health Sci. 11(4). DOI:10.4314/rejhs.v11i4.8
Kaur, S., and Mehra, R. (2020). Dosimetric impact of natural terrestrial radioactivity on residents of lower Himalayas, India. Environmental Geochemistry and Health. DOI:10.1007/s10653-020-00748-3
Li, H., Huang, Y., Liu, J., and Duan, H. (2021). Hydrothermally synthesized titanate nanomaterials for the removal of heavy metals and radionuclides from water: A review. Chemosphere. Elsevier Ltd. DOI:10.1016/j.chemosphere.2021.131046
Orosun M. M., Usikalu M. R., Onumejor C. A., Akinnagbe D. M., Orosun O. R, Salawu N. B., et al.,(2021). Assessment of Natural Radionuclide Contents in Water and Sediments from Asa-Dam, Ilorin, Nigeria. IOP Conf. Series: Earth and Environmental Science 655 (2021) 012090. DOI:10.1088/1755-1315/655/1/012090
Suresh, S., Rangaswamy, D. R., Srinivasa, E., & Sannappa, J. (2020). Measurement of radon concentration in drinking water and natural radioactivity in soil and their radiological hazards. Journal Of Radiation Research and Applied Sciences, 13(1), 12–26. DOI: 10.1080/16878507.2019.16
Vaupotic, J., Kobal, I., and Planinic, J. (1998). Long term radon investigation in four selected kindergartens in different geological and climatic regions of Slovenia. Journal of Radioanalytical and Nuclear Chemistry, 238, 61–66. DOI:10.1007/s10967-020-07501-1
Ufoegbune G. C., Oparinde O. C. and Eruola A. O.(2011)Municipal water supply planning in Oyo metropolis, Oyo State, South Western Nigeria Journal of Geography and Regional Planning; 4(7), 392-400.
UNSCEAR 2010 United Nations Scientific Committee on the Effects of Atomic Radiation.
UNSCEAR 2008 REPORT Sources and Effects of Ionizing Radiation. Vol. I. SOURCES. Report to the General Assembly with Scientific Annexes, United Nations New York.
UNSCEAR. (2000). United nation scientific committee on the effect of atomic radiation (2000). Sources and effects of ionizing radiation. UNSCEAR report to the General Assembly. New York, USA: Scientific annexes, United Nation.
US-EPA. (1991). United State Environmental Protection Agency. National Primary drinking water regulations for radionuclides, Unites state government printing office (EPA/570/9- 91/700).
World Health Organization. (2004). World health organization. Guidelines for the drinking water quality (4th ed.). World Geneva: Radiological aspect (Chapter 9).
World Health Organization. (2009). World health organization handbook on indoor radon: A public health Perspective. World Health Organization. https://apps.who.int/iris/handle/10 665/44149