Abstract
The gas phase reaction between elemental mercury (Hg°) and ozone (O3) has been studied in sunlight, in darkness, at different temperatures, and different surface-to-volume (s/v) ratios. At O3 concentrations above 20 ppm, a loss of Hg° and a simultaneous formation of oxidized mercury (Hg(II)) was observed. The results suggest a partly heterogeneous reaction, with a gas phase rate constant of 3 ± 2 x 10-20 cm3 molec.-1 s-1 at 20 °C. Tlus corresponds to an atmospheric Hg half-life of about one year at a mean global O3 concentration of 30 ppb.
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Hall, B. (1995). The Gas Phase Oxidation of Elemental Mercury by Ozone. In: Porcella, D.B., Huckabee, J.W., Wheatley, B. (eds) Mercury as a Global Pollutant. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0153-0_34
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DOI: https://doi.org/10.1007/978-94-011-0153-0_34
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