Hydroxyl radical formation in aqueous reactions (pH 3-8) of iron(II) with hydrogen peroxide: the photo-Fenton reaction | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

3342

Reference Type

Journal Article

Title

Hydroxyl radical formation in aqueous reactions (pH 3-8) of iron(II) with hydrogen peroxide: the photo-Fenton reaction

Author(s)

Zepp, RG; Faust, BC; Hoigne, J

Year

1992

Is Peer Reviewed?

Journal

Environmental Science & Technology
ISSN: 0013-936X
EISSN: 1520-5851

Volume

Issue

Page Numbers

313-319

Web of Science Id

WOS:A1992HB87100018

Abstract

Kinetics studies of the indirect photooxidation of trace hydroxyl radical (+OH) probes in aqueous solutions were used to evaluate the nature and formation efficiency of the transient oxidants that are generated when hydrogen peroxide reacts with Fe(II) that is produced from photoreduction of Fe(III) (lambda = 436 nm). Results of studies of these "photo-Fenton reactions" under various test conditions are in good agreement with the hypothesis that Fe2+ and its oxalate, citrate, and phosphate complexes react with H2O2 efficiently to produce +OH in water at pH values ranging from 3 to 8. Such reactions involving Fe(II) and H2O2 provide a generally important pathway for oxidations in the environment and possibly for the treatment of contaminated waters.