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Evaluating the fate of metals in air pollution control residues from coal-fired power plants
Citation:
THORNELOE, S. A., D. S. KOSSON, F. SANCHEZ, A. C. GARRABRANTS, AND G. HELMS. Evaluating the fate of metals in air pollution control residues from coal-fired power plants. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 44(19):7351-7356, (2010).
Impact/Purpose:
journal article
Description:
Changes in air pollution control at coal-fired power plants are shifting mercury (Hg) and other metals from the flue gas at electric utilities to the coal ash. This paper presents data from the characterization of73 coal combustion residues (CCRs) evaluating the composition and constituent release rates across a range of plausible CCR management conditions which includes land disposal or use in engineering and commercial applications. The results suggest that totals content is not a good predicator of leaching. In addition, there is variability in the totals content of metals and other constituents. There is even greater variability for. the leaching results by several orders of magnitude which can vary depending upon the material, element, coal rank, and air pollution control technology. The conclusion is that better characterization of CCRs may be needed to identify which materials and field management conditions are protective of human health and the environment versus those that may result in later release of Hg and other constituents of potential concern (COPCs) captured through the use of more stringent air pollution control.
URLs/Downloads:
EVALUATING THE FATE OF METALS IN AIR POLLUTION CONTROL RESIDUES FROM COAL-FIRED POWER PLANTS
Abstract
Website
NRMRL RTP P 1057.PDF (PDF, NA pp, 1250 KB, about PDF)