Characterization of a typical urban soil in terms of natural radionuclide content. The case study of a university campus
Serpil Aközcan Pehlivanoğlu,
Simona Mancini,
Selin Özden,
Michele Guida,
Mariarosaria Falanga
Affiliations
Serpil Aközcan Pehlivanoğlu
Kirklareli University, Faculty of Science and Literature, Department of Physics, Campus of Kayali, 39100, Kirklareli, Turkey; Laboratory Ambient and Radiations (AmbRa), Department of Information and Electric Engineering and Applied Mathematics (DIEM), University of Salerno, via Giovanni Paolo II, 134 84084, Fisciano, Italy
Simona Mancini
Laboratory Ambient and Radiations (AmbRa), Department of Information and Electric Engineering and Applied Mathematics (DIEM), University of Salerno, via Giovanni Paolo II, 134 84084, Fisciano, Italy; Department of Information and Electric Engineering and Applied Mathematics, University of Salerno, via Giovanni Paolo II, 134 84084, Fisciano, Italy; Corresponding author. Laboratory Ambient and Radiations (AmbRa), Department of Computer Engineering, Electric Engineering and Applied Mathematics (DIEM), University of Salerno, via Giovanni Paolo II, 134 84084, Fisciano Italy.
Selin Özden
Kirklareli University, Faculty of Science and Literature, Department of Physics, Campus of Kayali, 39100, Kirklareli, Turkey
Michele Guida
Laboratory Ambient and Radiations (AmbRa), Department of Information and Electric Engineering and Applied Mathematics (DIEM), University of Salerno, via Giovanni Paolo II, 134 84084, Fisciano, Italy; Department of Information and Electric Engineering and Applied Mathematics, University of Salerno, via Giovanni Paolo II, 134 84084, Fisciano, Italy
Mariarosaria Falanga
Department of Information and Electric Engineering and Applied Mathematics, University of Salerno, via Giovanni Paolo II, 134 84084, Fisciano, Italy; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Napoli–Osservatorio Vesuviano, via Diocleziano, 328 - 80124, Naples, Italy
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.226Ra, 232Th, and 40K 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 226Ra, from 72.28 ± 7.61 to 146.00 ± 22.27 Bq kg−1 for 232Th and, for 40K, 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.
