International Journal of Nuclear Science

Estimation of Linear No-Threshold (LNT) Cancer Risks from Radon Concentrations in Groundwater Samples from MubiNorth Metropolis, Adamawa State, Nigeria

Abstract

Ahmadu Ibrahim, Dalhatu Muhammad, Sani Bello, Baba Jacob Buba, Umaru Musa, Kadala Yakubu Mbaya and Beatrice Humphrey Bomki

This research assessed the Radon (222Rn) concentrations in groundwater sources from Mubi- north metropolis, and estimated the associated excess lifetime cancer risk (ELCR) using the linear no-threshold (LNT) model. Radon concentration was estimated from the gross alpha activity concentration obtained using MCP 2000-DP at center for energy research and training (CERT) Ahmadu Bello University, Zaria. The mean Radon activity concentration in water and air ranging from 0.0082 – 0.1518 and 3.28 x10-9 -6.072 x10-8 Bq/L respectively, this meant that the concentration of Radon in water is far greater than in air, the annual effective dose for the locations ranging from 9.44 x10-18 – 4.723 x 10-16 Sv, and the excess lifetime cancer risk (ELCR) ranging from 3.637 x 10-17 – 1.818 x 10-15. The concentration of Randon in all the sampling locations were below the recommended screening limit of 0.5Bq/L by world health organization (WHO) and other radiation protection agencies, therefore the water from the locations is good for drinking and domestic activities.

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