Iron-Laden Drainage from a Flooded Anthracite Mine,

Abstract Acidic mine drainage (AMD) containing ele-vated concentrations of dissolved iron and other metals can be neutralized to varying degrees by reactions with lime-stone in passive treatment systems. We evaluated the chemical and mineralogical characteristics and the effec-tiveness of calcitic and dolomitic limestone for the neutralization of net-acidic, oxic, iron-laden AMD from a flooded anthracite mine. The calcitic limestone, with CaCO3 and MgCO3 contents of 99.8 and \0.1 wt%, respectively, and the dolomitic limestone, with CaCO3 and MgCO3 contents of 60.3 and 40.2 wt%, were used to construct a downflow treatment system in 2003 at the Bell Mine, a large source of AMD and baseflow to th