Measurements of radon and estimation of excess lifetime cancer risk in water-well samples along Iwaraja-Ifewara faults Southwestern, Nigeria

Dosunmu, G.O and Ademola, A.K and Jidele, P.A and Ajayi, K.F and OLOWOFILA, I. O. (2022) Measurements of radon and estimation of excess lifetime cancer risk in water-well samples along Iwaraja-Ifewara faults Southwestern, Nigeria. International Research Journal of Public and Environmental Health, 9 (4). pp. 120-124. ISSN 2814-3817

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Abstract

Health risks of Radon in water is a global concern. Radon is the major radioactive carcinogen in water causing lung cancer among non-smokers. The concentration of Radon in water depends on the geological nature of the zone. In this study, drinking water sourced from underground water wells in selected towns in southwestern, Nigeria, along the Iwaraja-Ifewara geological fault-line were sampled. Twenty (20) water samples were collected within 50 m to 150 m at the fault line. RAD-7 was used for Radon concentration measurement. Radiation doses due to ingestion and inhalation of Radon were determined and excess cancer risk were determined. The Radon concentration ranges 5.0 to 400.1 Bq/l with a mean value of 45.78±85.93 Bq/l. Radon concentration obtained is higher than US EPA recommended limit of 11.1 Bq/l in 70% of the samples. The mean value of total annual effective doses obtained was 59.4 μSv/y, which is below the US EPA recommended level of 100 μSv/y. The excess lifetime cancer risk (ECLR) due to inhalation from the water samples ranged from 75.6 to 6053.5 with a mean of 692.9, which is also below the recommended limit. Therefore, water samples from the study areas are safe for drinking.

Item Type:	Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User:	Mr. Bolanle Yisau I.
Date Deposited:	09 Apr 2024 14:33
Last Modified:	09 Apr 2024 14:33
URI:	http://eprints.federalpolyilaro.edu.ng/id/eprint/2335

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