Distribution of trace elements in benthal deposits with a low content of organic matter in the lakes of West Siberia
The paper studies the regularities of formation of the trace-element composition of benthal deposits of the reference lakes in West siberia by statistical methods. For the statistical analysis, the experimental data of 29 sediment samples are used. 60 trace elements from these samples of benthal deposits are identified. According to the results of the factor analysis, a group of trace elements with similar mechanics of accumulation in benthal deposits of the lakes in West siberia is distinguished. For the Cr, Cu, Ni, Sr, Ti, V, Zn, Zr, Ag trace elements, the close interrelationship with the aluminum oxide content in the benthal deposits is determined. It allows us to make the conclusion of the dominating accumulation of these trace elements with aluminosilicates in the benthal deposits. For Cr, Cu, Sr, V, Zn trace elements, the mathematical expression to describe sorption processes in the "water - bottom sediments" system is obtained with the method of regression analysis. The obtained dependences can be used to evaluate the participation of mineral components in the formation of the trace-element composition of benthal deposits. Besides, they can be used to determine the extent of anthropogenic influence, since they are obtained for the reference lakes of West siberia.