Pedogeochemical barriers of heavy metals’migration distribution in chernozems soil profile at Kryvorizhzhya

Abstract

The basic regularities of the distribution of heavy metals’migration pedogeochemical barriers in soil profile of the chernozems ordinary and southern at Kryvy Rih mining and metallurgical regions were analyzed. It was pointed out that heavy metals’migration pedogeochemical barriers is a part of the soil horizon or soil profile, where there is a significant concentration of individual chemical elements as a consequence of the substitution-reaction phenomenon. Pedogeochemical barriers are classified into five types: mechanical, physical, physical and chemical, chemical and biological. The spread of pedogeochemical barriers in Chernozem is determined by the peculiarities of distribution of their leading components: humus, clay, colloids, and carbonates. According to the coefficients of concentration, the maximum content Fe and Mn in chernozems ordinary and Fe, Mn, Zn and Cu in chernozems southern was found in the surface humus-accumulative horizon. In addition, the action of heavy metals’migration pedogeochemical barriers can be considered as leaching of metals such as: Pb and Cd, which is due to these metals a-biofilm. In chernozems ordinary, the most intensively pedogeochemical barriers act in the humus transitional and humus cumulative horizons. In chernozems southern, the pedogeochemical barriers act most intensively in the humus accumulative horizon.