HR: 13:55h
AN: B12D-02    [PDF]
TI: Photochemistry of Dissolved Organic Matter in Arctic Surface Waters
AU: * Grannas, A M
EM: agrannas@chemistry.ohio-state.edu
AF: The Ohio State University, Dept. of Geological Sciences 125 S. Oval Mall Mendenhall Lab, Columbus, OH 43210 United States
AU: Chin, Y
EM: yo@geology.ohio-state.edu
AF: The Ohio State University, Dept. of Geological Sciences 125 S. Oval Mall Mendenhall Lab, Columbus, OH 43210 United States
AU: Miller, P L
EM: penney.miller@rose-hulman.edu
AF: Rose-Hulman Institute of Technology, Dept. of Chemistry 5500 Wabash Avenue, Terre Haute, IN 47803 United States
AB: It has been shown that persistent organic pollutants (POPs), transported to the Arctic by long-range processes, can potentially contaminate Arctic surface waters and affect both local ecosystems and human health. Once deposited, the behavior of these pollutants is poorly understood; particularly the processes that govern their lifetime and concentrations within the water column. Here, we discuss the photochemical degradation of several halogenated organic pollutants (e.g., lindane, hexachlorobenzene) as mediated by natural dissolved organic matter (DOM). These experiments were conducted both in a controlled laboratory setting using an artificial sunlight simulator, as well as in situ in Alaskan surface waters near Toolik Lake. Our findings to date show high variability in the photodegradation rates of the target POPs and can be correlated to both their structure and the type of DOM present.
DE: 0345 Pollution--urban and regional (0305)
DE: 0400 Biogeosciences
DE: 1615 Biogeochemical processes (4805)
SC: Biogeosciences [B]
MN: 2003 Fall Meeting