Abstract
Radon (222Rn) is a radioactive, noble insoluble gas with a half-life of 3.8 days. It belongs to the uranium (238U) decay chain where radon is formed from radium (226Ra). Uranium and radium are built into mineral structures or are, for example, adsorbed on the surface of clay minerals, limonite or organic material. When radon is formed by radioactive decay from radium, parts of it enter the pores of rocks and soils and are transported by diffusive or advective forces in the pores. The transport rate depends on the permeability and water content in the pores (Nazaroff 1992).
Highlights
Radon and its radioactive decay products are Weichselian deposits inhaled by living beings and are the Saalian deposits main source of radiation to which humans are exposed
50 km ed that 10% of all cases of lung cancer in Denmark are caused by radon inhalation (Sundhedsstyrelsen 1987)
It has been demonstrated that rocks and soils around and below houses are the main sources of radon emanation
Summary
Radon (222Rn) is a radioactive, noble insoluble gas with a ish sediments and rocks Damkjær & Korsbech 1985; half-life of 3.8 days. It belongs to the uranium (238U) decay Gravesen et al 1996) and have demonstrated its relationship chain where radon is formed from radium (226Ra). Uranium to radon levels in Danish buildings (Andersen et al 2006; and radium are built into mineral structures or are, for ex- Raaschou-Nielsen et al 2008). When radon is formed by radioactive decay ping of Quaternary surface deposits and information about from radium, parts of it enter the pores of rocks and soils and radon in sediments and rocks was performed by Andersen et are transported by diffusive or advective forces in the pores. When radon is formed by radioactive decay ping of Quaternary surface deposits and information about from radium, parts of it enter the pores of rocks and soils and radon in sediments and rocks was performed by Andersen et are transported by diffusive or advective forces in the pores. al. (2001)
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