FUEL 89 |
| Fred Lipfert, Independent Consultant to Brookhaven National Laboratory, 23 Carl Court, Northport, NY 11768, Terrence M. Sullivan, Environmental Sciences Department, Brookhaven National Laboratory, PO Box 5000, Upton, NY 11973, and Scott A. Renninger, National Energy Technology Laboratory, U. S. Department of Energy, PO Box 880, 3610 Collins Ferry Rd., Morgantown, WV 26507-0880. |
| The rationale for regulating mercury air emissions from U.S. coal-fired power plants depends largely on mathematical dispersion modeling, including the atmospheric chemistry processes that affect the partitioning of Hg emissions into elemental (Hg0) and the reactive (RGM) forms that may deposit more rapidly near sources. This paper considers the experimental support for this paradigm, including: excess metals in Texas lakes close to power plants; excess Hg in Spanish cattle raised near power plants; higher Hg in soil near a Chinese power plant; lower ambient Hg and in fish in one of the main U.S. coal burning regions (no significant spatial relationship between fish Hg and local Hg deposition); and absence of excess Hg near other U.S. power plants. Also, ozone is important in oxidizing Hg0, and power plant plumes are depleted in ozone in the near field. Recent measurements in plumes show evidence of RGM reduction. |
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Mercury Measurement, Transformations, Control, and Related Issues in Power Systems
1:00 PM-4:50 PM, Monday, March 29, 2004 Marriott -- Gold Key II, Oral
Division of Fuel Chemistry |