Photolysis Study of Perfluoro-2-methyl-3-pentanone under Natural Sunlight Conditions

The UV−vis and infrared absorption cross sections of perfluoro-2-methyl-3-pentanone (CF3CF2C(O)CF(CF3)2, 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone), has been obtained, and a photolysis study was carried out under natural sunlight conditions in the European simulation chamber, Vale...

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Bibliographic Details
Published in:Environmental science & technology 2005-11, Vol.39 (22), p.8708-8711
Main Authors: D'Anna, Barbara, Sellevåg, Stig R, Wirtz, Klaus, Nielsen, Claus J
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheric pollution
Environmental monitoring
Exact sciences and technology
Fire protection
Flame Retardants - metabolism
Fluids
Fluorocarbons - metabolism
Pentanones - metabolism
Photolysis
Pollutants physicochemistry study: properties, effects, reactions, transport and distribution
Pollution
Sun
Sunlight
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Summary:The UV−vis and infrared absorption cross sections of perfluoro-2-methyl-3-pentanone (CF3CF2C(O)CF(CF3)2, 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone), has been obtained, and a photolysis study was carried out under natural sunlight conditions in the European simulation chamber, Valencia, Spain (EUPHORE). The photolysis loss rate, J photol, equaled (6.4 ± 0.3) × 10-6 s-1 in the period of 10−14 GMT, July 14, 2003 in Valencia (0.5 W, 39.5 N) and corresponded to an effective quantum yield of photolysis of 0.043 ± 0.011 over the wavelength range of 290−400 nm; the error limits correspond to 2σ from the statistical analyses. The atmospheric lifetime of CF3CF2C(O)CF(CF3)2 is estimated to be around 1 week, and the global warming potential of the compound is negligible.
ISSN:0013-936X
1520-5851
DOI:10.1021/es048088u