Issue 4, 2017

Aqueous singlet oxygen reaction kinetics of furfuryl alcohol: effect of temperature, pH, and salt content

Abstract

The rate constant for the reaction between furfuryl alcohol (FFA) and singlet oxygen (1O2) in aqueous solution was measured as a function of temperature, pH and salt content employing both steady-state photolysis (β value determination) and time-resolved singlet oxygen phosphorescence methods. The latter provided more precise and reproducible data. The reaction rate constant, krxn,FFA, had a relatively small temperature dependence, no pH dependence and showed a small increase in the presence of high salt concentrations (+19% with 1 M NaCl). A critical review of the available literature suggested that the widely used value of 1.2 × 108 M−1 s−1 is likely overestimated. Therefore, we recommend the use of 1.00 × 108 M−1 s−1 for reactions performed in low ionic strength aqueous solutions (freshwater) at 22 °C. Furthermore, corrections are provided that should be applied when working at higher or lower temperatures, and/or at high salt concentrations (seawater).

Graphical abstract: Aqueous singlet oxygen reaction kinetics of furfuryl alcohol: effect of temperature, pH, and salt content

Supplementary files

Article information

Article type
Paper
Submitted
02 Dec 2016
Accepted
14 Feb 2017
First published
14 Feb 2017
This article is Open Access
Creative Commons BY license

Environ. Sci.: Processes Impacts, 2017,19, 507-516

Aqueous singlet oxygen reaction kinetics of furfuryl alcohol: effect of temperature, pH, and salt content

E. Appiani, R. Ossola, D. E. Latch, P. R. Erickson and K. McNeill, Environ. Sci.: Processes Impacts, 2017, 19, 507 DOI: 10.1039/C6EM00646A

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