Photochemical transformations in ice: Implications for the fate of chemical species

Details Photochemical transformations in ice: Implications for the fate of chemical species Photochemical transformations in ice: Implications for the fate of chemical species

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3321d&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 20, p. 3321-3324

Mathematics

Logic

11

Geochemistry: Organic Geochemistry, Hydrology: Snow And Ice, Oceanography: Biological And Chemical: Photochemistry

Scientific paper

A quantum yield of ϕice=2.3×10-4(+/-4×10-5) was determined for the photochemical degradation of 4-nitrophenol over the wavelength range of 300 to 370 nm in ice pellets (pH 5.6). Five reaction products were identified: hydroquinone, benzoquinone, 4-nitrosophenol, nitrate, nitrite, and the likely formation of organic polymers. The similarities of these results to the observations from 4-nitrophenol photolysis in aqueous solutions indicate that similar mechanisms are operative in both phases. The photochemical decomposition of 4-nitrophenol under conditions similar to those in polar snow and ice suggests that other direct and indirect photochemical process can occur in the polar ice/snow during spring and summer.

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