Microanalysis of metals in coal and coal ash using the Stanford/USGS SHRIMP-RG ion microprobe[Sensitive High-Resolution Ion MicroProbe--Reversed Geometry]
The capability of the SHRIMP-RG ion microprobe to determine the micro-distribution of selected trace metals in coal and coal ash was investigated as part of a larger study of the behavior of air toxic metals during coal combustion. Initial work, reported here, used the oxygen (O) ion source for in-situ determination of Cr and other elements in illite/smectite, a major inorganic constituent of the coals analyzed. This was followed by tests of the applicability of the SHRIMP-RG for trace-metal analysis of fly ash from a Kentucky power plant, in which U and Pb concentrations were determined in the coarse (63--150 micrometer) fraction of the fly ash. The results for illite/smectite confirm that it is an important source of chromium that may be emitted during coal burning. Results for fly-ash show that the {sup 75}As peak is resolvable from potential interferences in glass standards and partially resolvable in the fly ash, indicating that the SHRIMP-RG may be useful in characterizing the distribution of leachable metals condensed on fly ash surfaces.
- Research Organization:
- Geological Survey, Reston, VA (US)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AI22-95PC95145
- OSTI ID:
- 20034339
- Resource Relation:
- Conference: 25th International Technical Conference on Coal Utilization and Fuel Systems, Clearwater, FL (US), 03/06/2000--03/09/2000; Other Information: PBD: 2000; Related Information: In: 25th international technical conference on coal utilization and fuel systems: Proceedings, by Sakkestad, B.A. [ed.], 969 pages.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Grain Scale Distribution of Rare Earth Elements in Coal Ash by SHRIMP-RG Ion Microprobe
Toxic substances from coal combustion -- A comprehensive assessment