SS3.17 Global Mercury Cycling: From Natural to Anthropogenic Sources
Date: Tuesday, June 11, 2002
Time: 12:00:00 PM
Location: Carson C
 
AriyaPA, McGill University, Montreal, Canada, parisa.ariya@mcgill.ca
Khalizov, A, , McGill University, Montreal, Canada, 
Gidas, A, , McGill University, Montreal, Canada, 
Viswanathan, B, , McGill University, Montreal, Canada, 
Meritis, D, , McGill University, Montreal, Canada, 
 
REACTIONS OF GASEOUS MERCURY WITH SELECTED ATMOSPHERIC OXIDANTS AT AIR-WATER INTERFACE
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One of the major unknowns in the knowledge of transport of mercury between various environmental compartments, is the nature of the transformation processes occurring within the Earth’s atmosphere. This talk will focus on our combined laboratory kinetics, mechanistic, and modeling studies on the oxidation reactions of gaseous Hg0 by molecular halogens, as well as radicals such as atomic halogens and halogen oxides in the light of mercury depletion events observed in the Arctic and sub-Arctic which are considered to reach the aquatic systems. The impacts of the oxidation products on the formation of condensed matter and their potential on speciation of mercury on snow will be discussed. The reduction of the oxidized mercury and recycling of elemental mercury back to atmosphere and their potential impact on bioaccumulation will also be evaluated.