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Radionuclide concentration analysis of total moss bodies often gave relatively different results than a separate analysis of each different morphological part of the same sample. The dynamics of the transfer of metals by dust uplifted from the soil and another approach, based on the diffusion of the two radionuclides to the moss, have been analyzed. In the proposed model, short- and long-term approaches have been applied. Each part of a moss's profile can show different radionuclides accumulation ability, including both 210 Pb and 210 Po isotopes. A first-order kinetic model has been used for 210 Po and 210 Pb transport between three body components of mosses. This mathematical approach has been applied for 210 Po activity concentration in the air estimation. For relatively clean deep forest region, calculated concentrations were from 17.2 to 43.8 μBqm -3 , while for urban air concentrations were higher from 49.1 to 104.9 μBqm -3 .

Kinetics of 210Po accumulation in moss body profiles