Neutralization Potential of Reclaimed Limestone Residual (RLR)
Mining activities that lead to the exposure of iron pyrite and sulfite minerals associated with coal deposits to air and water result in the problem of acid mine drainage (AMD). In the U.S., AMD and other toxins from abandoned mines have polluted 180,000 acres of reservoirs and lakes, and 12,000 miles of streams and rivers. Acidity is a characteristic of AMD, and due to low pH conditions metals such as iron, aluminum, copper, zinc, manganese, magnesium, and calcium are leached from soil and rock contaminating streams.
Reclaimed Limestone Residual (RLR) is a co-product of the steel making process, and is developed during the refining of crude iron products to steel. It has been shown to have oxidation-reduction capabilities that facilitate metals reduction, and also has significant acid neutralizing potential. In this study, the neutralization potential of RLR was studied.
KeywordsRLR acid mine drainage neutralization slag x-ray diffraction
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The authors would like to thank the U.S. Department of Energy for funding this work under grant number DE-PS26-03NT41634-14. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
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