Iron-catalyzed photochemical oxidation of benzoic acid, one of the major photodegradation products of petroleum hydrocarbons, was studied with sunlight and monochromatic light in a wavelength range of 254-419 nm. The photochemical degradation of benzoic acid occurred at 245 nm either in the presence or in the absence of iron(III). Addition of iron(III) greatly enhanced the photodegradation of benzoic acid at 350 nm, 419 nm, and under solar irradiation. The major reaction products were monohydroxybenzoic acids and ferrous iron species. The proposed reaction mechanism included photoexcitation of iron(III) hydroxide complexes to form iron(II) species and corresponding hydroxyl radicals that attack ortho, meta, and para positions of benzoic acid to form monohydroxybenzoic acids and hydrogen peroxide. The monohydroxybenzoic acids were attacked further by hydroxyl and surperhydroxyl radicals to yield dihydroxybenzoic acids. This is an abstract of a paper presented at the 229th ACS National Meeting (San Diego, CA 3/13-17/2005).
|Original language||English (US)|
|Number of pages||3|
|Journal||ACS, Division of Environmental Chemistry - Preprints of Extended Abstracts|
|State||Published - Dec 1 2005|
|Event||ACS, Division of Environmental Chemistry - Preprints of Extended Abstracts - San Diego, CA, United States|
Duration: Mar 13 2005 → Mar 17 2005
ASJC Scopus subject areas