Natural Environmental Pollutants in the Black Shale Zones ?

摘要

The main natural sources of water contamination in the areas of black shale rocks in the western slope ofthe Urals are considered. They are characterized by the presence of various toxic elements due to sorption activity by carbonaceous matter. A substantial increase in their concentrations with the transition to readily soluble forms occurs in the weathered rocks and karst cavities. The latter are eroded by streams, and solutions or suspensions with a high content of toxic elements are transported over long distances. Their most substantial concentrations are found in the clayey weathered rocks (especially for Zn, Hg, Pb, Ni, As, Cu, V). In many parts ofthe world the territory of black shale rocks are areas of intensive mining activity, the ecological condition of which requires constant monitoring.