Abstract
The forms of Cd, Pb, and Zn compounds in alluvial soils were studied on the basis of sequential chemical fractionation according to the modified Tessier scheme. It is established that most of the studied elements are fixed in the composition of strongly bonded compounds. When lead is contaminated, the initial ratio of the forms of Cd, Zn elements changes slightly, and Pb - significantly. Their accumulation in the most mobile forms is noted. The different ability of the studied soils to fix lead is shown. It is revealed that the main mechanism of lead fixation in polluted soils is ion exchange absorption.
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