Photochemical transformation of pyrene and benzo(a)pyrene vapor-deposited on eight coal stack ashes

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es00143a011· OSTI ID:6012078

Yokley, R A; Garrison, A A; Wehry, E L; Mamantov, G

The photochemical decomposition of pyrene and benzo(a)pyrene, as adsorbates deposited from the vapor phase, has been examined on eight coal stack ashes of diverse origin and properties. Similar studies using alumina, silica gel, controlled-porosity glass, and graphite adsorbents also have been performed. Phototransformation of the adsorbates proceeds more slowly on any of the ash substrates than on alumina, silica, or glass surfaces. Those ashes relatively high in carbon and/or iron content are especially effective at suppressing photodegradation of adsorbed pyrene or benzo(a)pyrene. This relationship appears, at least in part, to be associated with the relatively dark colors of those ashes. The apparent acidity of ash surfaces does not appear to be related to the rate of phototransformation of adsorbed polycyclic aromatic hydrocarbons. 40 references, 1 figure, 5 tables.

• Research Organization: Univ. of Tennessee, Knoxville
• DOE Contract Number: AS05-81ER60006
• OSTI ID: 6012078
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 20:1; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
AROMATICS
ASHES
BENZOPYRENE
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHEMISTRY
COAL
COMPARATIVE EVALUATIONS
CONDENSED AROMATICS
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
MATERIALS
ORGANIC COMPOUNDS
PHOTOCHEMISTRY
PYRENE
RESIDUES