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Quantification of Plasma-Produced Hydroxyl Radicals in Solution and their Dependence on the pH
Francesco Tampieri1,2,3, Maria-Pau Ginebra1,2,3,4, Cristina Canal1,2,3
1Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgy, Technical University of Catalonia (UPC), c. Eduard Maristany 16, 08019 Barcelona, Spain.
Abstract:
HO radicals are the most important reactive species generated during water treatment by non-thermal plasma devices. In this letter, we report the first quantification of the steady-state concentration and lifetime of plasma-produced hydroxyl radicals in water solutions at pH 3 and 7, and we discuss the differences based on their reactivity with other plasma-generated species. Finally, we show to what extent the use of chemical probes to quantify short-lived reactive species has an influence on the results and that it should be taken into account.
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