Rate constants of the reaction of the hydrated electron and hydroxyl radical with ozone in aqueous solution

authored by

D. Bahnemann, Edwin J. Hart

Abstract

Absolute rate constants for the reaction of the hydrated electron and hydroxyl radical with ozone in aqueous solution have been determined by using pulse radiolysis techniques. The rate constant, k(e_aq^- + O₃) = (3.60 ± 0.14) × 10¹⁰ dm³ mol^-1 s^-1, was measured in the pH range 4.1-6.05 by following the decay of e_aq^- at 600 nm. The rate constant k(OH• + O₃) = (3.02 ± 0.25) × 10⁹ dm³ mol^-1 s^-1, was obtained by a competition method at pH 6.7 with acetate ions as the OH• radical scavengers. The ozone concentration for both studies varied from 0.05 × 10^-3 to 0.50 × 10^-3 mol dm^-3.

External Organisation(s)

Helmholtz-Zentrum Berlin für Materialien und Energie (HZB)

Type

Article

Journal

Journal of Physical Chemistry

Volume

86

Pages

252-255

No. of pages

4

ISSN

0022-3654

Publication date

1982

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Engineering, Physical and Theoretical Chemistry

Electronic version(s)

https://doi.org/10.1021/j100391a024 (Access: Unknown)