Radioecological researches using different analytical techniques

The aim of the present work is to give comprehensive studies in terms of ecological situation in two countries of different geological features (Egypt and Belarus). 89 samples of soil and 84 sediment were collected from Egypt [1]. While 63 samples were collected from Belarus. The samples were analyzed using Neutron activation analysis and gamma spectrometry. In Belarus, the maximum activity of Cs 137 was observed in the Gomel' region near Mazyr (6830 Bq/kg) and the minimum activity in the Vitsebsk Region near Luzhki-Yazno (5 Bq/kg) [2]. The average activity concentrations of K 40, Th 232, and U 238 equal to 15.3±6.6, 15.6±11.1 and 220±31 Bq/kg, respectively, are significantly lower than those reported for the upper continental crust, world average sediments as well as world average soils, suggesting the presence of a considerable portion of mafic material, most probably originating from the Ethiopian High Plateau. (authors)