Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-29T09:05:16.147Z Has data issue: false hasContentIssue false
  • English
  • Français

Fixation of Leachable Elements in Composite Waste Forms from North Dakota Lignite Coal Conversion Ash

Published online by Cambridge University Press:  21 February 2011

D. J. Hasseti  and
D. F. Hassett
D. J. Hasseti
Affiliation:
N.D. Mining and Mineral Resources Research Institute, Energy and Mineral Research Center, University of North Dakota, Grand Forks, North Dakota 58202
D. F. Hassett
Affiliation:
N.D. Mining and Mineral Resources Research Institute, Energy and Mineral Research Center, University of North Dakota, Grand Forks, North Dakota 58202
Get access

Abstract

Composite waste forms prepared using solid and liquid waste streams from an integrated coal gasification facility at Beulah, North Dakota, were evaluated for the potential leachability of select trace elements using batch tests. Cylinders were fabricated from seven blends of the solid components using liquid waste incinerator blowdown, multi-effect evaporator concentrate, or tap water. Individual waste forms and composites were leached using the same protocols. Both long term and short term leaching tests were used to evaluate these composite waste forms.Comparisons of measured concentrations of elements with values calculated from data on individual components were used to determine any change in leachability that may have occurred. These changes were expressed as a fixation factor, which is a term derived by dividing the calculated leachability by the measured concentrations from the actual leaching tests. Results from these experiments indicated that leachability of some elements could be lowered by the mixing of various solid and liquid waste streams. Ettringite formation is one possible mechanism responsible for fixation of several of the elements.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 113: Symposium Q – Fly Ash and Coal Conversion By-Products IV , 1987 , 333
Copyright
Copyright © Materials Research Society 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Stevenson, R.J., Hassett, D.J., McCarthy, G.J. and Manz, O.E., Solid Waste Codisgosal Screenine Study, Topical Report to the Gas Research Institute, October, 1986.Google Scholar
2. McCarthy, G.J., Hassett, D.J., Manz, O.E., Groenewold, G.H., Stevenson, R.J. and Henke, K.R., in Fly Ash and Coal Conversion By-Products: Characterization. Utilization and Disposal II, edited by McCarthy, G.J., Glasser, F.P. and Roy, D.M., Mat. Res. Soc. Symp. Proc. Vol.65, (Materials Research Society, Pittsburgh, 1986) pp. 301–310.Google Scholar
3. Hassett, D.J., Henke, K.R. and McCarthy, G.J., in Fly Ash and Coal Conversion By-Products: Characterization. Utilization and Disoosal II, edited by McCarthy, G.J., Glasser, F.P. and Roy, D.M., Mat. Res. Soc. Symp. Proc. Vol.65, (Materials Research Society, Pittsburgh, 1986) pp. 285–300.Google Scholar
4. Kumarathasan, P. and McCarthy, G.J., Fly Ash and Coal Conversion By-Products: Characterization. Utilization and Disposal III, edited by McCarthy, G.J., Glasser, F.P., Roy, D.M. and Diamond, S., Mat. Res. Soc. Symp. Proc. Vol.86 (Materials Research Society, Pittsburgh, 1987) pp. 109–112.Google Scholar
5. U.S. Environmental Protection Agency, Federal Register, 51(9) 1750–1758 (January 14, 1986), ISSN 0097–6326.Google Scholar
6. Hassett, D.J., in Proceedings of Waste Management for the Energy Industries, North Dakota Mining and Mineral Resources Research Institute and the Energy Research Center, University of North Dakota, Grand Forks, North Dakota (1987) pp 31–39.Google Scholar
7. U.S. Environmental Protection Agency, Federal Register, 45(98) 33121–33133 (May 19, 1980), ISSN 0097–6326.Google Scholar
8. Mason, B.J. and Carlile, D.W., Round Robin Evaluation of Regulatory Extraction Methods forSolid Wastes, EPRI Report EA-4740, December 1986.Google Scholar