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Characterization of Coal Combustion Residues from Electric Utilities Using Wet Scrubbers for Multi-Pollutant Control
Citation:
Sanchez, F., D. Kosson, R. KEENEY, R. Delapp, L. Thrner, P. KARIHER, AND S. THORNELOE. Characterization of Coal Combustion Residues from Electric Utilities Using Wet Scrubbers for Multi-Pollutant Control. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-08/077, 2008.
Impact/Purpose:
EPA report
Description:
This report evaluates changes that may occur to coal combustion residues (CCRs) in response to changes in air pollution control technology at coal-fired power plants, which will reduce emissions from the flue gas stack by transferring pollutants to fly ash and other air pollution control residues. This report presents an evaluation of air pollution control residues that may result from the use of SO2 scrubbers as mercury control technology at coal-fired power plants, and the potential for transfer of pollutants from the resulting residues to water resources or other environmental systems (e.g., soils, sediments). The specific objectives of the research are to: 1. Evaluate the potential for leaching to groundwater of mercury and other metals removed from coal-fired power plant air emissions by multi-pollutant control technology. 2. Provide the foundation for assessing the impact of enhanced mercury and multi-pollutant control technology on leaching of mercury and other metals; and 3. Perform these assessments using the most appropriate evaluation methods currently available. The laboratory leach testing followed the approach developed by Kosson, et al. (2002), which considers the effects of varying environmental conditions on waste -constituent leaching.