The effects of environmental parameters on the radon exhalation rate from the ground surface in HBRA in ramsar with a regression model

Fathabadi, N. and Mohammadi, M. and Dehghani, R. and Kardan, M. and Atoof, F. and Farahani, M.V. and Moradi, M. (2013) The effects of environmental parameters on the radon exhalation rate from the ground surface in HBRA in ramsar with a regression model. Life Science Journal, 10 (SUPPL.). pp. 563-569.

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Abstract

An important radioactive, colorless and odorless gas emitted from natural radium existing in the ground, radon is an element of the U238 chain. Based on conducted studies, Ramsar has been recognized as one of the most polluted areas in the world as far as the exhalation of radon is concerned. The most important resources of radon in Ramsar are soil resources, water resources, groundwater, surface water and hot springs. In this study, 50 stations in high radioactivity areas of Ramsar were selected and the position of each station in terms of latitude and longitude was recorded with a GPS device; then, radon exhalation and gamma dose rates were measured using an AlphaGuard device and a portable gamma spectroscopy system, respectively. Furthermore, some environmental parameters such as temperature, pressure, relative humidity, the distance of each station from the mineral hot springs, the time interval between the rainfall and the day of measurement, soil moisture status and also weather conditions at the time of measurement were recorded, and the effect of measured environmental parameters on the radon exhalation rate was subsequently evaluated using Spss software and finally modeled by linear regression method. The gamma dose rate was around 58-7100 n.sv/hr and the radon exhalation rate was about 9-15370 mBq/m2.s. In this study, only the variables of gamma dose rate and soil moisture were effective on exhalation rate. The correlation between gamma dose and radon exhalation rate was significant and higher than the other variables. Results indicate that the estimated average annual effective Radon exhalation rate for the study area is much higher than the worldwide average figure of 16 mBq/m2.s reported by UNSCEAR. It can therefore be concluded that an assessment of the radiological hazard of living these area is crucial.

Item Type: Article
Additional Information: cited By 0
Subjects: Health Professions
Divisions: Faculty of Health > Department of Environmental health
Depositing User: editor . 2
Date Deposited: 03 Mar 2017 13:36
Last Modified: 03 Mar 2017 13:36
URI: http://eprints.kaums.ac.ir/id/eprint/667

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