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The geochemistry and bioreactivity of fly-ash from coal-burning power stations

Jones, Timothy Peter, Wlodarczyk, Anna Julia, Koshy, Lata, Brown, Patrick Duncan, Longyi, Shao and Berube, Kelly Ann 2009. The geochemistry and bioreactivity of fly-ash from coal-burning power stations. Biomarkers 14 (S1) , pp. 45-48. 10.1080/13547500902965195

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Fly-ash is a byproduct of the combustion of coal in power stations for the generation of electricity. The fly-ash forms from the melting of incombustible minerals found naturally in the coal. The very high coal combustion temperatures result in the formation of microscopic glass particles from which minerals such as quartz, haematite and mullite can later recrystallize. In addition to these minerals, the glassy fly-ash contains a number of leachable metals. Mullite is a well-known material in the ceramics industry and a known respiratory hazard. Macroscopically mullite can be found in a large range of morphologies; however microscopic crystals appear to favour a fibrous habit. Fly-ash is a recognized bioreactive material in rat lung, generating hydroxyl radicals, releasing iron, and causing DNA damage. However, the mechanisms of the bioreactivity are still unclear and the relative contributions of the minerals and leachable metals to that toxicity are not well known.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Environmental Sciences
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QD Chemistry
R Medicine > RA Public aspects of medicine > RA0421 Public health. Hygiene. Preventive Medicine
Uncontrolled Keywords: Fly-ash, coal-burning, mullite, quartz, bioreactivity, fibrous minerals, lungs
Publisher: Informa
ISSN: 1354-750X
Last Modified: 02 Feb 2022 08:42

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