Oxidation of nitric oxide controlled by turbulent mixing in plumes from oil sands extraction plants |
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| Institution: | 1. Atmospheric Sciences Department, Alberta Research Council, 7th Floor, Terrace Plaza, Edmonton, Alberta, Canada, T6H 5R7;2. Kananaskis Center for Environmental Research, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada, T2N 1N4;1. School of Earth and Environmental Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia;2. Centre for Energy, The University of Western Australia, Crawley, WA, 6009, Australia;1. University of Waterloo, Waterloo, ON N2L 3G1, Canada;2. Environment Canada, Burlington, ON L7R 4A6, Canada;1. Department of Neurology, the Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan;2. Department of Pathology, the Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan;3. Division of Neuropathology, Department of Pathology, the Jikei University School of Medicine, 3-25-8, Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan |
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| Abstract: | Results are presented of airborne measurements taken in oil sands extraction plant plumes in Fort McMurray, Alberta, Canada. Measurements with fast response monitors at a high sampling rate illustrate the narrow reaction zone in the plume caused by a turbulent diffusion reaction of NO to NO2 as suggested by theoretical and laboratory studies. The measured conversion rates of NO to NO2 varied considerably from day to day, from 0.2 to 21.4% min−. Analysis of the oxidation rate of NO to NO2 and of the atmospheric turbulence parameter reveals that, over the distances and time scales within which the plumes are distinguishable from the background, the nitrogen oxides chemistry in the plumes is controlled by the rates at which the plumes mix with the ambient air (containing ozone), rather than by chemical kinetics. |
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