ABSTRACT
The chemistry of selenium (Se) in coal overburden materials can be influenced by mining and reclamation operations (Dreher and Finkelman, 1992). During surface coal mining, rock material overlying the coal is redistributed from its original stratigraphic position. Exposure of previously buried material to surface oxidizing conditions can decrease the stability of Se-containing sulfides and organic matter, increasing the potential solubility of Se species (Lindner-Lunsford and Wilson, 1992; White and Dubrovsky, 1994).
