Hornbuckle, K. C.. University of Iowa, 319 335 5660
Bogdan, J. C.. State University of New York at Buffalo, jjbogdan@acsu.buffalo.edu

 
A STUDY OF ORGANIC CONTAMINANTS IN AIR AND WATER IN CONJUNCTION WITH EPISODIC EVENTS - GREAT LAKES EXPERIMENT(EEGLE)
 
ATMOSPHERIC DEPOSITION IS AN IMPORTANT COMPONENT OF THE WHOLE-LAKE CYCLING OF MANY ORGANIC COMPOUNDS IN LAKE MICHIGAN. WE HYPOTHESIZE THAT THE MAGNITUDE OF ATMOSPHERIC DEPOSITION OF PERSISTENT ORGANIC COMPOUNDS (POPS) IS AT LEAST PARTLY DEPENDENT ON THE PARTITIONING BEHAVIOR OF THE COMPOUNDS BETWEEN WATER AND SEDIMENT IN THE WATER COLUMN AS WELL AS SEASONAL METEOROLOGICAL/HYDROLOGICAL EVENTS. TO TEST THIS HYPOTHESIS, WE HAVE COLLECTED AIR, WATER AND SEDIMENT TRAP SAMPLES BEFORE (JAN. 1998) AND DURING (MARCH 1998) A MAJOR SEDIMENT PLUME EVENT IN LAKE MICHIGAN. THESE SAMPLES WERE COLLECTED IN COORDINATION WITH EEGLE (EPISODIC EVENTS - GREAT LAKES EXPERIMENT), A LARGE PHYSICAL AND BIOLOGICAL STUDY OF THE PLUME EVENT. THEY WERE ANALYZED FOR A SUITE OF 32 POLYCYLIC AROMATIC HYDROCARBONS (PAHS) AND POLYCHLORINATED BIPHENYLS (PCBS). CONCENTRATIONS OF THE PAHS WERE HIGHLY VARIABLE IN SPACE DURING THE TWO SAMPLING PERIODS. FOR EXAMPLE, TOTAL DISSOLVED PHASE PAHS RANGED FROM 407.82 AND 27,550.57 NG/M3. SOME OF THIS VARIATION CAN BE ATTRIBUTED TO THE PLUME EVENT.
 
Day: Thursday, Feb. 4
Time: 12:00 - 12:15pm
Location: Eldorado Hotel
 
Code: SS52TH1200E