A Study of Natural Radioactivity Levels and Radon/Thoron Release Potential of Bedrock and Soil in Southeastern Ireland.

Szczegóły
Abstrakt

Tytuł:: A Study of Natural Radioactivity Levels and Radon/Thoron Release Potential of Bedrock and Soil in Southeastern Ireland.
Autorzy:: Mousavi Aghdam M; Department of Civil and Environmental Engineering and Architecture, University of Cagliari, 09123 Cagliari, Italy.; Department of Geology, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland.
Crowley Q; Department of Geology, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland.
Rocha C; Biogeochemistry Research Group, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland.
Dentoni V; Department of Civil and Environmental Engineering and Architecture, University of Cagliari, 09123 Cagliari, Italy.
Da Pelo S; Department of Chemical and Geological Sciences, University of Cagliari, 09042 Cagliari, Italy.
Long S; Environmental Protection Agency of Ireland, D14YR62 Dublin, Ireland.
Savatier M; Biogeochemistry Research Group, School of Natural Sciences, Trinity College, D02PN40 Dublin, Ireland.
Źródło:: International journal of environmental research and public health [Int J Environ Res Public Health] 2021 Mar 08; Vol. 18 (5). Date of Electronic Publication: 2021 Mar 08.
Typ publikacji:: Journal Article; Research Support, Non-U.S. Gov't
Język:: English
Imprint Name(s):: Original Publication: Basel : MDPI, c2004-
MeSH Terms:: Air Pollutants, Radioactive*/analysis
Air Pollution, Indoor*/analysis
Radiation Monitoring*
Radioactivity*
Radon*/analysis
Housing ; Ireland ; Soil
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Contributed Indexing:: Keywords: airborne radiometric; geological combination and soil type; radiation risk; radon and thoron exhalation rates
Substance Nomenclature:: 0 (Air Pollutants, Radioactive)
0 (Soil)
Q74S4N8N1G (Radon)
Entry Date(s):: Date Created: 20210403 Date Completed: 20210423 Latest Revision: 20210423
Update Code:: 20240104
PubMed Central ID:: PMC7967442
DOI:: 10.3390/ijerph18052709
PMID:: 33800209
: Czasopismo naukowe

Radon ( 222 Rn) and thoron ( 220 Rn) account for almost two-thirds of the annual average radiation dose received by the Irish population. A detailed study of natural radioactivity levels and radon and thoron exhalation rates was carried out in a legislatively designated "high radon" area, as based on existing indoor radon measurements. Indoor radon concentrations, airborne radiometric data and stream sediment geochemistry were collated, and a set of soil samples were taken from the study area. The exhalation rates of radon (E 222 Rn ) and thoron (E 220 Rn ) for collected samples were determined in the laboratory. The resultant data were classified based on geological and soil type parameters. Geological boundaries were found to be robust classifiers for radon exhalation rates and radon-related variables, whilst soil type classification better differentiates thoron exhalation rates and correlated variables. Linear models were developed to predict the radon and thoron exhalation rates of the study area. Distribution maps of radon and thoron exhalation rates (range: E 222 Rn [0.15-1.84] and E 220 Rn [475-3029] Bq m -2 h -1 ) and annual effective dose (with a mean value of 0.84 mSv y -1 ) are presented. For some parts of the study area, the calculated annual effective dose exceeds the recommended level of 1 mSv y -1 , illustrating a significant radiation risk. Airborne radiometric data were found to be a powerful and fast tool for the prediction of geogenic radon and thoron risk. This robust method can be used for other areas where airborne radiometric data are available.

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