土壌水中における長寿命放射性核種の移動

Abstract

The movements of 10 radionuclides in the water-saturated soil were studied. Clay loam or sand obtained from reactor sites, and Toyoura standard quartz sand were used as a soil sample. Breakthrough curves and sorption distributions of radionuclides along soil columns were observed under various conditions such as pH, coexisted ions and the kinds of teaching solution. The results obtained are as follows : (1) the divalent ions such as 54Mn, 85Sr, 60Co and 65Zn were not adsorbed so intensively, and high mobilities were observed, (2) the radionuclides of 137Cs and 144Ce were extremely adsorbed on soil surface, and their mobilities were not so high as to the divalent ions described above, (3) the radionuclides of io6Ru, 95Zr, 95Nb and iiomAg were retained largely in the soils, but some parts of their radionuclide moved as easy as to the divalent ions in soil water system.