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CHARACTERIZATION OF MERCURY-ENRICHED COAL COMBUSTION RESIDUES FROM ELECTRIC UTILITIES USING ENHANCED SORBENTS FOR MERCURY CONTROL
Citation:
SANCHEZ, R., R. KEENEY, D. KOSSAN, R. DELAPP, AND S. THORNELOE. CHARACTERIZATION OF MERCURY-ENRICHED COAL COMBUSTION RESIDUES FROM ELECTRIC UTILITIES USING ENHANCED SORBENTS FOR MERCURY CONTROL. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-06/008, 2006.
Impact/Purpose:
Inform the public
Description:
Leaching of mercury and other constituents of potential concern during land disposal or beneficial use of coal combustion residues (CCRs) is the environmental impact pathway evaluated in this report. The specific objectives of the research was to: (1) evaluate mercury, arsenic and selenium removed from coal-fired power plant air emissions by air pollution control technology, and as a result contained in the CCRs; the potential for leaching of the toxic metals into the groundwater was considered; (2) provide the foundation for assessing the impact of enhanced mercury and multi-pollutant control technology on leaching of mercury during the life cycle of CCR management, including storage, beneficial use and disposal, and (3) perform these assessments using the most appropriate evaluation methods currently available. Results of laboratory leaching tests were used to develop estimates of constituent release under field management scenarios. Laboratory leaching test results also were compared to field observations of leaching. The report focuses on facilities that use injected sorbents for mercury control. Each fly ash sampled was evaluated for leaching as a function of pH and liquid-to-solid ratio. Mercury, arsenic and selenium were the primary constituents of interest.
URLs/Downloads:
EPA-600-R-06-008.PDF (PDF, NA pp, 3464 KB, about PDF)CHARACTERIZATION OF MERCURY-ENRICHED COAL COMBUSTION RESIDUES FROM ELECTRIC UTILITIES USING ENHANCED SORBENTS FOR MERCURY CONTROL