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Issue 4, 2017
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Aqueous singlet oxygen reaction kinetics of furfuryl alcohol: effect of temperature, pH, and salt content

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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

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Publication details

The article was received on 02 Dec 2016, accepted on 14 Feb 2017 and first published on 14 Feb 2017


Article type: Paper
DOI: 10.1039/C6EM00646A
Citation: Environ. Sci.: Processes Impacts, 2017,19, 507-516
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    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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