Health Risk Assessment Induced by Inhalation Radon Content in the Indoor Air of Decorative Stone of Storehouses

Radon is a colorless, odorless half-life radioactive gas that that can be emission from decorative stones such as granite, marble, etc. inhaling radon gas over a long period may increase in lung cancer among patients.
Material and In this cross-sectional-descriptive study, Radon 222 and Thoron concentrations was measured in four Decorative stones of warehouse by Radon meter portable RTM1688-2 model in three stages. In total, 24 concentrations of 24 hours of indoor air and 24 concentrations of 4 hours of Radon 222 and thoron of the background air were measured. Then, effective dose received of Radon 222 and Thoron was calculated by UNSCEAR equations.
The mean indoor air radon and background air were 74±37 and 34±16 Bq/m3, respectively. The mean concentration of Radon of indoor air in Decorative stones of warehouses in DSW1, DSW2, DSW3 and DSW4 is 72.50±34, 98.25±43, 34.42±18 and 88.92±51 Bq/m3. The mean effective dose received by the staff from Radon 222 and Thoron at 8 working hours is 0.53±0.18 and 0.05±0.03 mSv/y and in 16 working hours is 1.05±0.36 and 0.11±0.07 mSv/y, respectively. Also, the mean effective dose received by staff from Radon at 8 and 16 working hours is 0.58±0.2 and 1.16±0.41 mSv/y.
Mean radon concentration in indoor air and the mean effective dose received by staff is lower than the standards level. Decorative stone of warehouses is the resources accumulation of Radon gas that can be reduced by doing corrective actions.