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Information × Registration Number 0205U007046, 0101U000032 , R & D reports Title Study of dynamic of processes of selfpurification terrestrial ecosystems from man-made contamination popup.stage_title Head Bondarenko German Nikolayevich, Registration Date 14-12-2005 Organization Institute of environment geochemistry popup.description2 Work is devoted to the study of dynamics of geochemical processes of transformation and migration of technogeneous pollutants. The conception of speciation of man-made radionuclides, consisting in determining of intensity of biogenic and abiogenic radionuclides water migration by their mobile species contents, is proposed. Synchronous-successive dependence of migration processes upon radionuclide speciation as well as proportionality of migration intensity to mobile species content allow to estimate the dynamics of radionuclide migration and forecast a self-decontamination of natural environment according to the parameters of kinetic model of pollutant transformation. It is shown, that dynamics of mobile species of man-made radionuclides, including TUE, can be described and forecasted using the kinetic model of transformation developed for 90Sr and 137Cs. It is proved, that the process of solid-phase diffusion of radionuclides in the activity carriers ("hot particles") insignificantly contributes to formation of mobile species comparatively with the processes of chemical interreactions with soil solution; the rate constant of radionuclide mobilization (k1) is an universal parameter for specific polluted soil. It is ascertained, that dynamics of mobile to fixed specious ratios of heavy metals artificially brought in soil substantially depend on the dose of bringing; dynamics of zinc and lead in vegetation is similar to that of their mobile specious in soils. It is established, that in the affected zones of large radiation accidents natural decontamіnation of ground ecosystems is the result of geochemical processes: іmmobіlіzation in soil is a leading process for radiocaesium, water migration with radionuclide removing outside the soil layer of root feed of vegetation - for radiostrontium. Product Description popup.authors popup.nrat_date 2020-04-02 Close