INVESTIGADORES
JURI AYUB Jimena
congresos y reuniones científicas
Título:
Radioecological Study in Natural Grasslands of Argentina. Modeling and Evaluation of the Impact on Humans and the Environment
Autor/es:
JURI AYUB, J.; VELASCO, R. H.; RIZZOTTO, M.
Lugar:
Barcelona
Reunión:
Congreso; International conference on the radioecology and Environmental radioactivity; 2014
Institución organizadora:
International Union of Radioecology
Resumen:
Varied anthropogenic and natural radionuclides are present in whole environments. Knowledge of which radionuclides are present and their distribution pattern is essential in maintaining some control on prevailing radiation levels and performing an assessment of the absorbed dose. In addition to natural radioactivity, manmade radionuclides may be present in the terrestrial environment as a result of nuclear weapon tests, nuclear accidents and usual releases. Soil acts as a medium of migration for transfer of these radionuclides to the biological systems. Radionuclides present in soil can be transferred to plants. For this reason, measurement of the radioactive concentrations in soil and plant is essential to assess the radiation dose to humans and to determine the total radioactive content and eventually contamination sources. Several studies concerning radioactivity bound to soil were carried out in many countries, but still very scarce in Argentina. Therefore, comprehensive studies with the objective to systematically measure the terrestrial gamma radiation in Argentina are needed. The goals of the present study were (a) determine the activity concentrations for 40K, 226Ra, 228Ac and 137Cs in surface soils and their vertical distribution, (b) estimates the external dose rate in air due to gamma radionuclides in soil, (c) determine the activity oncentrations in plants and the soil-plant transfer factor and (d) analyzed the root uptake capacity of grass species to incorporate Cs+ and K+ from the soil.