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Environmental Chamber Studies of Mercury Reactions in the Atmosphere

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Abstract:Mercury is released into the environment through both natural and anthropogenic pathways. The cycling and fate of mercury in atmospheric, soil, and water ecosystems is impacted by various factors, including chemical transformation and transport. An understanding of these processes is critical for predicting the impact of mercury emission controls and future mercury concentrations. The chemical transformations of elemental mercury in the atmosphere were studied to determine the role of atmospheric chemistry in the mercury cycle. The rates of the gas phase reactions of elemental mercury with molecular bromine, chlorine, and fluorine, the atomic halogens, BrO, ClO, ozone, and the nitrate radical were studied at room temperature in a 17.3 m3 environmental chamber. The fate of elemental mercury resulting from these chemical reactions was addressed by measurement of reactive gaseous mercury, article-phase mercury, and reactive mercury lost to the chamber surfaces during the experiments. The implications of these chemical reactions and others studied in environmental chambers for the cycling of elemental atmospheric mercury will be discussed.

This work has been funded wholly or in part by the United States Environmental Protection Agency Office of Research and Development. It has been subjected to peer review and approved for publication.
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Citation:Sumner, A. L., C. W. Spicer, J. Satola, R. Mangaraj, M. S. Landis, R. K. Stevens, and T. D. Atkeson. Environmental Chamber Studies of Mercury Reactions in the Atmosphere. Presented at American Geophysical Union's Fall Meeting, San Francisco, CA, December 13-17, 2004.
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Environmental Characterization & Apportionment Branch
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Product Type: Abstrct/Oral
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Presented: 12/15/2004
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Related Entries:
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Bullet Item Atmospheric Mercury Research
spacer Relationship Reason:   A Project of the Product
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