Size Distribution of Trace Metals in Flue Gas Particulate from a Pilot Scale Rotary Kiln Incinerator

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Title Size Distribution of Trace Metals in Flue Gas Particulate from a Pilot Scale Rotary Kiln Incinerator
Creator Fournier, Donald J. Jr.; Waterland, Larry R. Ph.D.; Carroll, Gregory J.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1990
Spatial Coverage presented at San Francisco, California
Abstract The distributions of nine trace metals in flue gas particulate by particle size range were determined as part of a pilot-scale hazardous waste incineration test program. These tests were conducted in the rotary kiln incinerator system at the Environmental Protection Agency's (EPA's) Incineration Research Facility (IRF) in Jefferson, Arkansas. The metals tested were arsenic, barium, bismuth, cadmium, chromium, copper, lead, magnesium and strontium. They were fed to the kiln as part of a synthetic hazardous waste feed representing a solid material containing both organic and metal contaminants. The variables for the seven tests addressed in this paper were kiln exit temperature (816° to 927°C (1500° to 1700°F» and waste feed chlorine content (0 to 8 percent). A flue gas sampling train located at the afterburner exit collected approximately 1 g of particulate during each test. Each sample was size fractionated, yielding ranges of nominally less than 2 nm, 2 to 4 nm, 4 to 10 nm, 10 to 30 nm, and greater than 30 nm. The fractionated samples were analyzed for each of the metals to determine the distribution of the metals in the particulate size ranges. Increasing kiln temperature from 816° to 927°C (1500° to 1700°F) caused the average distributions to shift from roughly 20 percent less than 10 nm to an average of 60 percent less than 10 nm for all test metals except chromium. In addition, individual metal enrichment in finer particulate correlated with relative metal volatilities, with the volatile metals becoming more enriched in the finer particulate fractions. For cadmium, copper, and lead, an increase in waste feed chlorine content from 0 to 4 percent caused their distributions to shift from roughly 20 percent less than 10 nm to 55 percent less than 10 nm. No further effects with feed chlorine increased to 8 percent were observed for these metals. For chromium, increasing chlorine content from 0 to 4 to 8 percent caused a corresponding shift of 2 to 20 to 50 percent in particulate less than 10 nm. The information described in this paper has been funded wholly or in part by the united states Environmental Protection Agency under contract No. 68-C9-0038 to Acurex Corporation. It has been subjected to the Agency's peer and administrative review and approved for presentation and publication.
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Language eng
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Scanning Technician Cliodhna Davis
Metadata Cataloger Kendra Yates
ARK ark:/87278/s6tm7dpr
Setname uu_afrc
Date Created 2012-04-20
Date Modified 2012-09-20
ID 6417
Reference URL