radon is a noble gas which has highest solubility in water, with the mole fraction value (1.25 105 at
37 C) of fifteen times higher than that of neon and helium
(USNRC., 1999). In addition, it has been determined that radon
inhalation dissolved in and released from water for human
consumption accounts for 89% of the estimated cancer risk,
whereas radon ingestion from drinking water accounts for
11% (USNRC., 1999). Dissolved radon exists in drinking water
and sensitive cells in stomach and other organs of the body
are exposed to the radon emitted radiation and its decay
products once they are absorbed into the bloodstream (Oner,
Yalim, Akkurt, & Orbay, 2009).