Distribution and mobility of ¹³⁷Cs, ⁹⁰Sr, ^239,240Pu and ²⁴¹ Am in solid phase-interstitial soil solution system

Belarusian State University, Radiochemistry Laboratory, F. Skoriny Ave. 4, 220050 Minsk, Belarus

Abstract

Analysis of the migratory properties of ¹³⁷Cs, ⁹⁰Sr, ^239,240Pu and ²⁴¹Am in different kinds of mineral and organic soils has been carried out. The radionuclide distribution coefficient between solid and interstitial water phases of soil was used as a parameter of radionuclide mobility. Redistribution of radionuclides in the soil profile, soil-plant, soil-environmental water systems to a great extent depends on this parameter. Determinations of ¹³⁷Cs, ⁹⁰Sr, ^239,240Pu and ²⁴¹Am in soils, interstitial soil solutions and estimation of distribution coefficients have been realized. The soil samples were taken in areas of Gomel, Mogilev and Brest regions of Belarus that were contaminated with radionuclides of Chernobyl origin. The influence of exchangeable radionuclide forms and moisture capacity of soil and such characteristics of the water phase as concentration of chemical analogs of radionuclides, organic matter and other components on distribution of ¹³⁷Cs, ⁹⁰Sr, ^239,240Pu and ²⁴¹Am in solid phase-interstitial water system has been analyzed.