The experimental data on distribution of 137Cs, 90Sr, 239+240Pu, 241Am from "Chernobyl" releases and ambient 230,232Th on the fraction of humic and fulvic acids sandy-podsolic, meadow and peaty soils taken in the ChNPP exclusive zone are presented. Soils organic matter was isolated by conventional alkali extraction (Turin's method). It was shown that, with depending of soils types 15 – 45 % of 241Am is associated with fulvic acids. In all investigated types of soils 30 – 40 % of 239+240Pu connects with humic acids, as strong complexes. The distribution of environmental 230,232Th and artificial 239+240Pu on the fraction natural organic species is the same.
Odintsov et al. (Mon,) studied this question.