Residential radon exposure and seasonal variation in the countryside of southeastern Brazil
- 26 July 2020
- journal article
- research article
- Published by Springer Science and Business Media LLC in Environmental Monitoring and Assessment
- Vol. 192 (8), 1-14
- https://doi.org/10.1007/s10661-020-08513-w
Abstract
Poorly ventilated environments such as residences can accumulate radon gas to levels that are harmful to humans and thus produce a public health risk. To assess the risk from natural radiation due to indoor radon exposure, 222Rn measurements, using an alpha RAD7 detector, were conducted in Timóteo, Minas Gerais state, southeastern Brazil. Indoor radon concentrations, along with meteorological parameters, were measured every 2 h during both wet and dry seasons in 2017 and 2018. The mean concentration of indoor radon varied between 18.0 and 412.8 Bq m−3, which corresponded to an effective annual dose of 1.2 and 7.6 mSv y−1. Average radon concentrations were significantly higher during the winter dry season, and there was a strong positive correlation with humidity in both wet and dry season. Furthermore, concentrations showed an inverse correlation with atmospheric pressure, wind speed, air temperature, and solar radiation. The radon levels are generally above the limits recommended by international standards, meaning that mitigation measures are needed to improve air quality to reduce human exposure and risk. Finally, through the statistical analysis, it was possible to determine the differences and similarities between the sampling points concerning the geology of the place and the geographical location.Keywords
Funding Information
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
This publication has 24 references indexed in Scilit:
- Seasonal variation of indoor radon-222 levels in dwellings in Ramallah province and East Jerusalem suburbs, PalestineRadiation Protection Dosimetry, 2011
- The influence of meteorological parameters on indoor radon in selected traditional Kenyan dwellingsJournal of Radiological Protection, 2009
- Tratamento estatístico dos parâmetros da qualidade das águas da bacia do alto curso do Rio das VelhasQuímica Nova, 2007
- Seasonal variation of indoor radon in dwellings of Malwa region, PunjabAtmospheric Environment, 2005
- Methodology for determination of radon-222 production rate of residential building and experimental verificationRadiation Measurements, 2005
- Medidas dos níveis de radônio em diferentes tipos de ambientes internos na região da Baixada Santista, SPRadiologia Brasileira, 2005
- Geophysical methods in radon risk studiesJournal of Environmental Radioactivity, 2005
- Multivariate statistical techniques for the evaluation of spatial and temporal variations in water quality of Gomti River (India)—a case studyWater Research, 2004
- Main Meteorological Parameters to Influence Indoor Radon Level.RADIOISOTOPES, 2002
- Investigation of the influences of atmospheric conditions on the variability of radon and radon progeny in buildingsAtmospheric Environment, 2001