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Radiolytic Reduction and Oxidation of Diethyl benzylphosphonate: A Pulse Radiolysis Study by Ailette Aguila; Kevin Ε. Ο'Shea; Prashant V. Kamat is a Environmental Science article available to read on EtoBox.

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The radiolytic reactions of the diethyl benzylphosphonate (DEBP) have been investigated upon reaction with pulse radiolytically generated e -^, hydroxyl, azide and CLr' radicals. Oxidation with hydroxyl radical yields a transient intermediate with absorption maximum at 320 nm and kinetic parameters, consistent with hydroxyl radical addition to the aromatic ring. Benzyl radical, if formed, appears to be a minor reaction product as a result of hydroxyl radical reactions. The bimolecular rate constant for hydroxyl radical is 7± 1 χ 10 9 M' 1 s" 1 , in neutral and alkaline solutions. DEBP does not appear to react with N 3 " and Cl 2 -'. The bimolecular rate constant for reduction of DEBP by hydrated electrons is 8 ±2 χ 10 7 M'V 1 . Hydroxyl radical appears to be the predominant species responsible for the degradation of DEBP in the radiolytic treatment. Basic understanding of these radical reaction intermediates and the kinetic parameters of various radical reactions can be useful in designing strategies for the destruction of other harmful organophosphorus compounds.

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Author

Ailette Aguila; Kevin Ε. Ο'Shea; Prashant V. Kamat

Published

1998

Language

EN

Field

Environmental Science (Physical Sciences)