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Characterization of a Lignite Ash from the METC Gasifier III. Correlations of Leaching Behavior and Mineralogy

Published online by Cambridge University Press:  25 February 2011

D. J. Hassett ,
G. J. McCarthy ,
K. R. Henke  and
E. D. Korynta
D. J. Hassett
Affiliation:
Fuels Analysis Laboratory, University of North Dakota, Grand Forks, ND 58202
G. J. McCarthy
Affiliation:
Department of Chemistry, North Dakota State University, Fargo, ND 58105
K. R. Henke
Affiliation:
Energy Research Center, University of North Dakota, Grand Forks, MD 58202
E. D. Korynta
Affiliation:
Engineering Experiment Station, Uriversity of North Dakota, Grand Forks, ND 58202
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Abstract

Lignite gasification ash from the Morgantown Energy Technology Center (METC) gasifier was subiected to two short-term leaching treatments. The cnncentrations of regulated elements in the EPA EP procedure leachate from the bulk METC ash did not exceed the “EP Trigger Limits.” A modification of this procedure that uses a basic synthetic groundwater instead of the acid EP extractant was also performed on the bulk ash and its eleven size fractions. Water equilibria modeling was used to explain the concentrations of major elements in solution. Corcentrations of minor and trace elements in solution after leaching with synthetic groundwater were also below “EP Trigger Limits.”

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 43: Symposium M – Fly Ash and Coal Conversion By-Products I , 1984 , 187
Copyright
Copyright © Materials Research Society 1985

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