Kurdistan University of Medical Sciences Journal of Advances in Environmental Health Research 2676-3478 13 4 2025 11 01 Indoor Radon in Larijan Buildings Affected by Geological Characteristics 228 232 237203 10.34172/jaehr.1403 EN Somayeh Dadashpoor Department of Natural Resources and Environment, SR.C., Islamic Azad University, Tehran, Iran 0009-0000-3213-321X Parvin Nassiri School of Public Health, Tehran University of Medical Sciences, Tehran, Iran 0000-0002-3159-5356 Alireza Mirzahosseini Department of Natural Resources and Environment, SR.C., Islamic Azad University, Tehran, Iran 0000-0002-7140-8308 Nabiollah Mansouri Department of Natural Resources and Environment, SR.C., Islamic Azad University, Tehran, Iran 0000-0002-4228-6444 Zahra Azizi Department of Geoinformation and Geomatics Engineering, Faculty of Civil, Water and Environmental Engineering, Shahid Beheshti University, Tehran, Iran 0000-0001-8572-7134 Journal Article 2024 11 18 Background: The decay of uranium and thorium is the primary source of radon emissions, a radioactive gas. The transfer and accumulation of this gas indoors pose serious health risks. Methods: This study investigated indoor radon concentrations in buildings located in areas with different geological characteristics. Thirty-six buildings were examined across three locations in Larijan, Iran, with samples collected from living rooms and bedrooms over a three-month period. Results: The average radon concentrations in bedrooms and living rooms were 114.40 Bq/m3 and 128.35 Bq/m3, respectively. Indoor radon levels in buildings near hot springs were 24.66% higher than those in buildings close to, and 45.31% higher than those in buildings far from, hot springs. Seasonal variation was also observed: the average concentration in winter was 112.05 Bq/m3, compared with 130.89 Bq/m³ in summer. These findings indicate that both climatic and geological conditions significantly influence indoor radon levels. Conclusion: Since radon concentrations in most buildings exceeded the World Health Organization (WHO) guideline of 100 Bq/m3, implementing exposure control programs in residential buildings is essential.

https://jaehr.muk.ac.ir/article_237203_1f543dd286d66fb0b3e0761227be90ca.pdf