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Kinetics and mechanism of oxidation of hydrogen sulfide by hydrogen peroxide in acidic solution

Hoffmann, Michael R. (1977) Kinetics and mechanism of oxidation of hydrogen sulfide by hydrogen peroxide in acidic solution. Environmental Science and Technology, 11 (1). pp. 61-66. ISSN 0013-936X. http://resolver.caltech.edu/CaltechAUTHORS:20151215-094958671

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Abstract

The kinetics of the oxidation of hydrogen sulfide and hydrosulfide ion to sulfur and sulfate in aqueous solution by hydrogen peroxide is studied potentiometrically. In the pH range 8-3, the rate law for the oxidation of H_2S is -d[H_2S]/dt = k_1[H_2S] [H_2O_2] + k_2K_(a1)[H_2S] [H_2O_2]/[H+] where K_(a1) is the first acid dissociation constant of H_S, k_2 = 29.0 M^(-1) min^(-1), and k_1= 0.5 M^(-1) min^(-1). The rate law and other data indicate that the reaction proceeds via a nucleophilic displacement by sulfide on hydrogen peroxide with the formation of polysulfide intermediates.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/es60124a004DOIArticle
http://pubs.acs.org/doi/abs/10.1021/es60124a004PublisherArticle
ORCID:
AuthorORCID
Hoffmann, Michael R.0000-0002-0432-6564
Additional Information:© 1977 American Chemical Society. Received for review, July 11, 1975. Accepted July 23, 1976. Financial support by the Rockefeller Foundation and the Public Health Service (ES 00080-08). The author thanks J. J. Morgan and T. Holm for helpful discussion.
Funders:
Funding AgencyGrant Number
Rockefeller FoundationUNSPECIFIED
U.S. Public Health Service (USPHS)ES 00080-08
Record Number:CaltechAUTHORS:20151215-094958671
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151215-094958671
Official Citation:Kinetics and mechanism of oxidation of hydrogen sulfide by hydrogen peroxide in acidic solution Michael R. Hoffmann Environmental Science & Technology 1977 11 (1), 61-66 DOI: 10.1021/es60124a004
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62925
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:15 Dec 2015 19:11
Last Modified:13 Feb 2019 18:06

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