Photolysis of smoke dyes on soils

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Environmental Toxicology and Chemistry; (United States)

DOI:https://doi.org/10.1897/1552-8618(1994)13[889:POSDOS]2.0.CO;2· OSTI ID:7265891

Adams, R L ^[1]; Weber, E J; Baughman, G L ^[2]

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1. Technology Applications Inc., Athens, GA (United States). Environmental Research Lab.
2. Environmental Protection Agency, Athens, GA (United States). Environmental Research Lab.

Photolysis of an azo, a quinophthalone, and several anthraquinone smoke dyes was studied on soil surfaces. Initially, rapid photodegradation of each dye occurred, followed by a period of much slower rate of loss, indicating that the remaining fraction of the dye was photochemically protected. The average mean depths of photolysis ranged from 0.33 to 0.68 mm for outdoor studies and from 0.42 to 0.73 mm for lab studies. The magnitude of the mean depths of photolysis suggests that photo-degradation of the dyes occurs through indirect photochemical processes. Photolysis products for only two of the dyes could be identified. Photolysis of Disperse Red 9 resulted in the formation of 1-aminoanthraquinone, whereas Solvent Yellow 33 photo-degraded to give 2-carboxyquinoline and phthalic anhydride. Reaction mechanisms involving sensitized photo-oxidation by singlet oxygen are consistent with the formation of these reaction products.

• OSTI ID: 7265891
• Journal Information: Environmental Toxicology and Chemistry; (United States), Journal Name: Environmental Toxicology and Chemistry; (United States) Vol. 13:6; ISSN 0730-7268; ISSN ETOCDK
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
AZO COMPOUNDS
AZO DYES
CHEMICAL REACTIONS
CHEMISTRY
CONTAMINATION
DECOMPOSITION
DYES
LAND POLLUTION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
POLLUTION
SOIL CHEMISTRY
SOILS