Indirect photolysis of acetochlor: Rate constant of a nitrate-mediated hydroxyl radical reaction

The second order rate constant, k 2, for reaction of the corn herbicide acetochlor with OH radicals was found to be 7.5 (±2.0) × 10 9 M −1 s −1, in close agreement with the value reported for a similar herbicide, alachlor, based on structure-activity relationships. Summer-time half-lives of 1–20 day...

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Bibliographic Details
Published in:Chemosphere (Oxford) 1998-05, Vol.36 (12), p.2699-2704
Main Authors: Fulkerson Brekken, Jennifer, Brezonik, Patrick L.
Format: Article
Language:English
Subjects:
Applied sciences
Biological and physicochemical phenomena
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Natural water pollution
Pollution
Pollution, environment geology
Water treatment and pollution
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Summary:The second order rate constant, k 2, for reaction of the corn herbicide acetochlor with OH radicals was found to be 7.5 (±2.0) × 10 9 M −1 s −1, in close agreement with the value reported for a similar herbicide, alachlor, based on structure-activity relationships. Summer-time half-lives of 1–20 days for acetochlor were estimated for the Blue Earth River (southern Minnesota), an agriculturally impacted river with high nitrate levels (the primary source of ·OH in surface waters).
ISSN:0045-6535
1879-1298
DOI:10.1016/S0045-6535(97)10223-5