Characterization of a typical urban soil in terms of natural radionuclide content. The case study of a university campus
Year: 2024
Type: article
Abstract: A first comprehensive survey was carried out in a university campus in Italy in order to investigate in terms of natural elements an area where medium-high values of natural radiation are expected because of its peculiar geological features. The content of terrestrial radionuclides in 20 topsoil samples from the campus was determined with the aim to provide an important database of the soil characteristics. 226 Ra, 232 Th, and 40 K concentrations were analysed by High Purity Germanium (HPGe) gamma-ray spectrometer in order to determine the background levels of natural radionuclides characteristics of the original area. The mean concentrations of radionuclides in the investigated soil samples ranged from 58.95 ± 4.20 to 158.05 ± 19.95 Bq kg −1 for 226 Ra, from 72.28 ± 7.61 to 146.00 ± 22.27 Bq kg −1 for 232 Th and, for 40 K, from 550.76 ± 33.24 to 1367.50 ± 18.73 Bq kg −1 . The radiological hazard indices, including radium equivalent activity, external hazard index, annual effective dose, absorbed dose rate, lifetime excess cancer risk, were also evaluated and compared with global averages, revealing values above the worldwide ones. Finally, a spatial modelling methodology of the site-specific radionuclides levels as graphical tool for the monitoring of the potential land redevelopment of urban soils was proposed.
Source: Heliyon
Language: English
Subfield: Radiological and Ultrasound Technology
Field: Health Professions
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $2,100
Awards: G1800595089, G980899861
OpenAlex ID: W4402038345