Forms of Fallout ~137Cs and ~239 + 240Pu in Successive Horizons of a Forest Soil

摘要

In order to understand better the mobility of Pu and Cs in a spruce forest soil, the forms of these radionuclisdes were examined by sequential extrac- tion analysis (modified Tessier procedure). In this way the fractions 'readily exchangeable' (fraction I), 'bound to sesquioxides' (fraction II), 'bound to organic matter' (fraction III), 'Persistently bound' (fraction II), and 'residual' (fraction V) of fallout ~239+240Pu and ~137Cs were assessed at 5 plots n the top organic horizons (Of1, Of2, Oh) and in the subsequent 4 layers o the mineral soil (0-2, 2-5, 5-10, and 10-20 cm).