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<p>Residential radon remains a research gap in Argentina, as in most South American countries. In this context, the present study reports the first 281 indoor radon measurements in dwellings and institutional buildings from the Punilla region (Córdoba, Argentina) to discuss the influence of geologic and architectural factors. Radon levels ranged from 6 to 307&#xa0;Bq/m³ (mean = 46&#xa0;Bq/m³), with 6% exceeding the WHO guideline of 100&#xa0;Bq/m³. Radon concentrations decreased by 41–87% from winter–fall to summer–spring, underscoring the need for a seasonal correction factor even in comparable temperate regions. Moderate to weak statistically significant correlations are detected between radon concentration and number of floors of the building (inverse), openings of the sampled room (inverse), and building age (direct). Sampled room size may account for higher radon concentrations (inverse). No patterns were identified between radon and building materials used in floors and walls of sampled rooms. Besides architectural features, geology remains the primary control in ˃100&#xa0;Bq/m<sup>3</sup> cases. Elevated concentrations are associated with the Achala Batholith and the Capilla del Monte granitoid, both characterized by relatively high uranium contents, whereas lower radon values are generally found in Paleozoic metamorphic and Quaternary unconsolidated units. Additionally, scattered high-radon cases along the western flank of the Sierra Chica indicate a contribution from the Sierra Chica Fault System. These results emphasize the importance of incorporating natural radioactivity into land-use planning and public health, particularly in Punilla, which is undergoing a rapid urban expansion.</p>

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Indoor radon in the Punilla Valley (Córdoba, Argentina): sources, controls and perspectives

  • 期刊论文

  • 发表日期：

    2025年12月22日

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  • Ivana L. Ozán,
  • Sebastián Oriolo,
  • María Natalia Maffini,
  • Federico Esteban,
  • Ignacio Ferreyro,
  • Daniel Temprano,
  • Cecilia G. Cantera,
  • María Sol Sívori,
  • Harold Zárate,
  • Darío Rodrigues Ferreira Maltez,
  • Andrea Ceretani,
  • María Selva Torriglia,
  • Héctor Ostera

摘要

Residential radon remains a research gap in Argentina, as in most South American countries. In this context, the present study reports the first 281 indoor radon measurements in dwellings and institutional buildings from the Punilla region (Córdoba, Argentina) to discuss the influence of geologic and architectural factors. Radon levels ranged from 6 to 307 Bq/m³ (mean = 46 Bq/m³), with 6% exceeding the WHO guideline of 100 Bq/m³. Radon concentrations decreased by 41–87% from winter–fall to summer–spring, underscoring the need for a seasonal correction factor even in comparable temperate regions. Moderate to weak statistically significant correlations are detected between radon concentration and number of floors of the building (inverse), openings of the sampled room (inverse), and building age (direct). Sampled room size may account for higher radon concentrations (inverse). No patterns were identified between radon and building materials used in floors and walls of sampled rooms. Besides architectural features, geology remains the primary control in ˃100 Bq/m3 cases. Elevated concentrations are associated with the Achala Batholith and the Capilla del Monte granitoid, both characterized by relatively high uranium contents, whereas lower radon values are generally found in Paleozoic metamorphic and Quaternary unconsolidated units. Additionally, scattered high-radon cases along the western flank of the Sierra Chica indicate a contribution from the Sierra Chica Fault System. These results emphasize the importance of incorporating natural radioactivity into land-use planning and public health, particularly in Punilla, which is undergoing a rapid urban expansion.