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
106Ru,
95Zr,
95Nb and
110mAg were retained largely in the soils, but some parts of their radionuclide moved as easy as to the divalent ions in soil water system.
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