Skip common site navigation and headers
United States Environmental Protection Agency
Exposure Research
Begin Hierarchical Links EPA Home > Research & Development > Exposure Research > Publications/Presentations > End Hierarchical Links

 

Divalent Inorganic Reactive Gaseous Mercury Emissions from a Mercury Cell Chlor-Alkali Plant and Its Impact on Near Field Atmospheric Dry Deposition

spacer
spacer
Abstract: The emission of inorganic divalent reactive gaseous mercury (RGM) from a mercury cell chlor-alkali plant (MCCAP) cell building and the impact on near field (100 km) dry deposition was investigated as part of a larger collaborative study between EPA, University of Michigan, Oak Ridge National Laboratory, Chlorine Institute, and Olin Corporation in February 2000. Measurements in the cell building roof vent showed that RGM constituted 1.9 +/- 0.8% (mean +/- standard deviation) of the concurrently measured elemental gaseous mercury (Hg0). This relationship was used to calculate an estimated RGM emission rate from the cell building roof vent of 10.4 g day-1. The percentage of RGM/Hg0 at ambient monitoring sites 350 m (1.5%) and 800 m (1.3%) away while being impacted by cell building emissions suggests the rapid deposition of RGM species. The observed 2% relative emission of RGM/Hg0 was substantially lower than the 30% estimate utilized by EPA to model the impact of MCCAPs for the 1997 Mercury Report to Congress. However, the MCCAP was still found to present a significant impact on near field mercury atmospheric dry deposition. A Lagrangian transport and deposition modeling framework using only emissions from the MCCAP found the mean annualized dry deposition of mercury within a 10 km radius of the facility contributed the annual equivalent of 4.6 ug m-2. For comparison, the total annual wet mercury deposition measured at the Savannah River National Mercury Deposition Network sampling site ~30 km away was 9.8 ug m-2.

This work has been funded wholly or in part by the U.S. Environmental Protection Agency. It has been subjected to Agency Review and approved for publication. Mention of trade names or commercial products does not constitute an endorsement or recommendation for use.
spacer
Citation:Landis, M. S., G. J. Keeler, K. I. Alwali, and R. K. Stevens. Divalent Inorganic Reactive Gaseous Mercury Emissions from a Mercury Cell Chlor-Alkali Plant and Its Impact on Near Field Atmospheric Dry Deposition. ATMOSPHERIC ENVIRONMENT 38(4):613-622, (2004).
spacer
spacer
Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
spacer
Division: Human Exposure & Atmospheric Sciences Division
spacer
Branch: Environmental Characterization & Apportionment Branch
spacer
Product Type: Journal
spacer
Published: 02/01/2004
spacer
Downloads:
spacer
Bullet Item Divalent Inorganic Reactive Gaseous Mercury Emissions from a Mercury Cell Chlor-Alkali Plant and Its Impact on Near Field Atmospheric Dry Deposition
spacer
spacer
Related Entries:
spacer
Bullet Item Atmospheric Mercury Research
spacer Relationship Reason:   A Project of the Product
spacer
spacer
spacer

 

ORD Home | Search EPA | Search NERL | Search EIMS | Contacts | Help

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last Updated on Monday, October 22, 2007
URL: http://cfpub.epa.gov