Mobility of 90Sr and 137Cs in soils characterized with contrasting properties

Abstract

Results of the study of 90Sr and 137Cs migration mobility in soils characterized with contrasting physical-chemical properties and granulometric composition has been analyzed. The mentioned radionuclides were intro-duced in soils in initial water-soluble form. Ecological and effective half-time of cleaning of soils 20-cm hori-zons (Tecol) has estimated. Mean values of Tecol 90Sr varies in limits 3.7 - 84 years. Tecol 137Cs varies in limits 61 - 265 years. Correlation of ecological half-time cleaning of soddy-podsolic soils species from radionuclide and physical-chemical properties and granulometric composition of these ones has been analyzed, strong correlation of Tecol 90Sr as well, as mean correlation of Tecol137Cs with mentioned soils characteristics has been noted.

Keywords

• 90Sr
• 137Cs
• vertical transport of radionuclides
• perennial dynamics of transport
• periods of half-time of cleaning
• physical-chemical properties and granulometric composition if soils