Distribution of Mobile Forms of Heavy Metals in Soil Horizons of the Southern Taiga (Tyumen Region)

Abstract

The purpose is to estimate the distribution of the content of mobile forms of heavy metals (Ni, Cu, Zn, Co, Cr, Cr, Mn, Cd, Pb) in genetic horizons of taiga soils of the Kondinsky lowland within the Tobolsk district of the Tyumen Region. Materials and Methods. The soil area under study is located near settlements on the left bank of the Irtysh and Tobol rivers and their infl uents – Shaltsa, Erek, Taima and Suklyomka. Extraction of mobile forms of heavy metals from the soil was carried out by acetate-ammonium buff er solution, with subsequent determination of their concentrations by atomic absorption method. Results and discussion. Results and discussion. The increase of concentrations of mobile forms of Mn and Cd with increasing share of sandy particles in the granulometric composition of the studied soils was revealed. Conclusions. Variation of concentrations of mobile forms of the studied elements is related to the granulometric composition and pH of the medium in diff erent types of soils.