Chemical Species in Fly Ash from Coal-Burning Power Plants

Science  19 Dec 1980:
Vol. 210, Issue 4476, pp. 1356-1358
DOI: 10.1126/science.210.4476.1356


Fly ash specimens from four power plants in the Tennessee Valley Authority system have been separated into three matrices: glass, mullite-quartz, and magnetic spinel. Chemical species of trace elements are defined to a large extent by the matrices that contain them. The magnetic component of fly ash is ferrite. The mullite-quartz phase is relatively pure and can be recovered as a resource.