Formation of ozone in the reaction of hydroxyl with O3- and the decay of the ozonide ion radical at pH 10-13

.. O/sub 3/ + OH/sup -/, is about 30% of the total reaction. A second reaction is OH + O/sub 3//sup -/ + OH/sup -/ ..-->.. 2O/sub 2//sup -/ + H/sub 2/O. The ozone formation is demonstrated by a high-pressure pulse radiolysis technique using a 4-..mu..s, 40-krd pulse. The ozone rapidly disappears in a reaction with the simultaneously formed O/sub 2//sup -/ re-forming O/sub 3//sup -/. The product resulting from the O/sub 3//sup -/ decay is the peroxy radical, O/sub 2//sup -/. The overall rate constant, k(OH + O/sub 3//sup -/), is (8.5 +/- 1.0) X 10/sup 9/ dm/sup 3/ mol/sup -1/ s/sup -1/. Computer simulations of the high-pressure system as well as of the atmospheric-pressure oxygenated system with high and low pulse intensity support a mechanism for the O/sub 3//sup -/ decay based on the above-mentioned reactions. The protonation rate constant of the O/sub 3//sup -/ radical ion, k(O/sub 3//sup -/ + H/sup +/), is (9.0 +/- 1.0) X 10/sup 10/ dm/sub 3/ mol/sup -1/ s/sup -1/. 6 figures, 2 tables. -->
ISSN: 1541-5740
0022-3654
DOI: 10.1021/j150646a021
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_________::ceb26cd209938e03c4f94d204319e9f2
https://doi.org/10.1021/j150646a021
Přírůstkové číslo: edsair.doi...........ceb26cd209938e03c4f94d204319e9f2
Autor: J. Holcman, Erling Bjergbakke, Edwin J. Hart, Knud Sehested
Rok vydání: 1984
Předmět:
Zdroj: The Journal of Physical Chemistry. 88:269-273
ISSN: 1541-5740
0022-3654
DOI: 10.1021/j150646a021
Popis: Ozone forms in aqueous alkaline solution, pH 10-13, by a reaction between OH and O/sub 3//sup -/ radicals. The reaction, OH + O/sub 3//sup -/ ..-->.. O/sub 3/ + OH/sup -/, is about 30% of the total reaction. A second reaction is OH + O/sub 3//sup -/ + OH/sup -/ ..-->.. 2O/sub 2//sup -/ + H/sub 2/O. The ozone formation is demonstrated by a high-pressure pulse radiolysis technique using a 4-..mu..s, 40-krd pulse. The ozone rapidly disappears in a reaction with the simultaneously formed O/sub 2//sup -/ re-forming O/sub 3//sup -/. The product resulting from the O/sub 3//sup -/ decay is the peroxy radical, O/sub 2//sup -/. The overall rate constant, k(OH + O/sub 3//sup -/), is (8.5 +/- 1.0) X 10/sup 9/ dm/sup 3/ mol/sup -1/ s/sup -1/. Computer simulations of the high-pressure system as well as of the atmospheric-pressure oxygenated system with high and low pulse intensity support a mechanism for the O/sub 3//sup -/ decay based on the above-mentioned reactions. The protonation rate constant of the O/sub 3//sup -/ radical ion, k(O/sub 3//sup -/ + H/sup +/), is (9.0 +/- 1.0) X 10/sup 10/ dm/sub 3/ mol/sup -1/ s/sup -1/. 6 figures, 2 tables.
Databáze: OpenAIRE
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