Photolysis of Aqueous H^sub 2^O^sub 2^: Quantum Yield and Applications for Polychromatic UV Actinometry in Photoreactors

Methanol is used to measure the yield of ...OH radicals produced in the photolysis of ... in aqueous solutions. The UV photolysis of ... generates ...OH radicals, which in the presence of methanol, oxygen, and phosphate buffer form formaldehyde, namely, ...(...) = ...(OH). The quantum yield of ...OH...

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Bibliographic Details
Published in:	Environmental science & technology Vol. 41; no. 21; p. 7486
Main Authors:	Goldstein, Sara, Aschengrau, Dorit, Diamant, Yishay, Rabani, Joseph
Format:	Journal Article
Language:	English
Published:	Easton American Chemical Society 01-11-2007
Subjects:	Aldehydes Aqueous solutions Environmental science Methanol Organic contaminants
Online Access:	Get full text
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Summary:	Methanol is used to measure the yield of ...OH radicals produced in the photolysis of ... in aqueous solutions. The UV photolysis of ... generates ...OH radicals, which in the presence of methanol, oxygen, and phosphate buffer form formaldehyde, namely, ...(...) = ...(OH). The quantum yield of ...OH has been redetermined in view of literature inconsistencies resulting in ...(...) = 1.11 ± 0.07 in the excitation range of 205-280 nm. The constancy of ...(...) and the ease and sensitivity of the formaldehyde product analysis makes the ... system suitable for polychromatic UV actinometry. In addition, the relatively low cost of the main components and the possibility of destroying the methanol before disposal qualify the system for both monochromatic and polychromatic actinometry in a large volume of water. The ... system was applied in different commercial UV photoreactors. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:	0013-936X