Gas phase Oxidation of Hg - Amherstgis.amherstma.gov/data/springnearc2010/C_Session3_0115... ·...
Transcript of Gas phase Oxidation of Hg - Amherstgis.amherstma.gov/data/springnearc2010/C_Session3_0115... ·...
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Important Reactions:
• Gas phase Oxidation of Hg0 by ozone and OH·
• Aqueous reduction of Hg2+ by sulfite (SO3
2-)
• Aqueous complexation of Hg2+ to soot, to form Hg(p)
Driscoll, C.T., D. Evers, K.F. Lambert, N. Kamman, T. Holsen, Y-J. Han, C. Chen, W. Goodale, T. Butler, T. Clair, and R. Munson. Mercury Matters: Linking Mercury Science with Public Policy in the Northeastern United States. Hubbard Brook Research Foundation. 2007. Science Links Publication. Vol. 1, no. 3.
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Driscoll, C.T., D. Evers, K.F. Lambert, N. Kamman, T. Holsen, Y-J. Han, C. Chen, W. Goodale, T. Butler, T. Clair, and R. Munson. Mercury Matters: Linking Mercury Science with Public Policy in the Northeastern United States. Hubbard Brook Research Foundation. 2007. Science Links Publication. Vol. 1, no. 3.
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Over 100 Sites
Measures Hg concentration in
precipitation and total weekly wet deposition
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Avg. Concentration: 3.88 ng/L
Total Wet deposition: 1798. ng/m2
Extrapolated annual deposition: 4721. ng/m2
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Mean from July 22, 2009 to March 17, 2010: 1.508 ng/m3.
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Ambient Readings at
Bunker:
~1.5 ng/m3
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Ambient Readings at
Bunker:
~1.5 ng/m3
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Extrapolated annual deposition at MDN Site: 4721. ng/m2
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HYSPLIT4
Sample Back-Trajectory
Residence Time Probability Plot (2009)
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All of August High Concentration Events
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