Content of forms of the lanthanides in soddy-calcareous soils at a different distance from the Cherepovets steel mill (Vologda region, Russia) has been studied. In soils near the steel mill, an increased content of Pr and Tb was found, while the content of other light lanthanides (from La to Gd inclusive) is less increased. In addition to increasing of the total content, technogenic pollution leads to increasing the amount and the degree of extraction of acid-soluble forms of the lanthanides from soils. About 80–95% of Ln is located in the residual fraction strongly bound to aluminosilicates. As a result of the processes in the soil, 5–18% of the total content of lanthanides is bound to organic matter and 0.1–5% to Fe and Mn (hydr)oxides. The lanthanides’ individual properties are manifested in this interaction: medium lanthanides are mostly bound to organic matter and whole heavy lanthanides to Fe and Mn (hydr)oxides.
Part of the book: Lanthanides