Extraction methods for studying the fractional composition of heavy metals in soils and their comparative assessment.

摘要

The data on the fractional composition of the heavy metal (HM) compounds in the plow horizon of a loamy-sandy soddy-podzolic soil investigated by different methods of fractionation are presented. The use of the BCR (Community Reference Bureau) scheme did not fully allow revealing some regularities governing the state of the copper, zinc, nickel, and lead in the soil. This system does not reflect the existing ideas concerning the interaction between the HMs and soil components. The chemical properties of the elements are manifested more distinctly when the scheme of the HM fractionation elaborated in our country is used. Despite some disadvantages, the method of chemical fractionation of metal compounds permits one to obtain adequate and useful information on the state of the microelements and HMs in soils.