Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 7, 2009
Previous Article Next Article

A combined theoretical and experimental study on the oxidation of fulvic acid by the sulfateradical anion

Author affiliations

Abstract

The kinetics of the reaction of sulfate radicals with the IHSS Waskish peat fulvic acid in water was investigated in the temperature range from 289.2 to 305.2 K. The proposed mechanism considers the reversible binding of the sulfate radicals by the fulvic acid. The kinetic analysis of the data allows the determination of the thermodynamic parameters ΔG° = −10.2 kcal mol−1, ΔH° = −16 kcal mol−1 and ΔS° = −20.3 cal K−1 mol−1 for the reversible association at 298.2 K. Theoretical (DFT) calculations performed with the Buffle model of the fulvic acids support the formation of H-bonded adducts between the inorganic radicals and the humic substances. The experimental enthalpy change compares well with the theoretical values found for some of the investigated adducts.

Graphical abstract: A combined theoretical and experimental study on the oxidation of fulvic acid by the sulfate radical anion

Back to tab navigation

Article information


Submitted
16 Jan 2009
Accepted
14 May 2009
First published
27 May 2009

Photochem. Photobiol. Sci., 2009,8, 992-997
Article type
Paper

A combined theoretical and experimental study on the oxidation of fulvic acid by the sulfate radical anion

P. M. D. Gara, G. N. Bosio, M. C. Gonzalez, N. Russo, M. del Carmen Michelini, R. P. Diez and D. O. Mártire, Photochem. Photobiol. Sci., 2009, 8, 992
DOI: 10.1039/B900961B

Social activity

Search articles by author

Spotlight

Advertisements