Abstract
Awareness of the presence of radon and its potential health effects is very low in Nigeria. The use of un-treated and un-stored groundwater capable of having high radon level, for drinking and other domestic purposes is being practised in the Southwestern Nigeria. Thus the exposure to radon from this source may result to high absorbed dose to the organs and tissues. Samples of groundwater assayed with an active radon detector (RAD7), manufactured by Durridge Company, USA provided the concentration of radon used as the input parameter for a computer application, developed for the simulation of radon concentration found in human organs and tissues, using the physiologically based pharmacokinetic(PBPK) model. Many of the water samples assayed were observed to have radon concentration above the United States Environmental Protection Agency (EPA) maximum contaminant level. Of the organs and tissues considered, the red bone marrow and the adipose tissue were found to retain more radon than others, hence they tend to have more absorbed dose from the alpha radiation emitted by the decay of radon. The results of this study revealed the necessity of radon exposure awareness among the citizens of Nigeria and setting of action plans for radon mitigation by the necessary organizations.
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