Simulation of biological uptake of uranium and radium in an industrially polluted area

Analysis of 238U, 226Ra, and 210Pb transfer factors from soil to the leaves of broadleaf tree species

“…That the soil con cen tra tion is one of the main factors caus ing TF vari a tion (and de crease) is also shown for ura nium and lead TF for the parts of the tree (leaf, nee dle, root), at two bo real for est sites [11]. Sim i larly, Noskova et al [27] re ported that for the above ground plant parts of Sorbus aucuparia and Betula pubescens trees 238 U up take de vi ated less from the men tioned decreas ing trend com pared to 226 Ra be cause ra dium uptake by plants might be more sen si tive to changes in the physicochemical char ac ter is tics of soil.…”

“…3 im plied that ac tiv ity con cen tra tions in tree leaves (C leaves ) are a non-lin ear func tion of ac tiv ity con cen trations in the soil (C soil ) of the type: C leaves = a C soil b with pa ram e ter val ues a > 0 and 1 < b < 1. This is a reg u larly ob served power func tion that re flects the non-lin ear ity in the soil to plant trans fer of the es sen tial and non-es sen tial el e ments [11,13,25,27]. To ex trap o late these ob tained re sults, it was ex am ined whether the con cen tra tion in leaves would be zero when the con cen tra tion in the soil is zero.…”