HR: 0800h
AN: A51A-0020    [Abstracts]
TI: Atmospheric trace metals in Lake Ontario Region
AU: * Wong, H K
EM: henry.wonf@ec.gc.ca
AF: Environment Canada, Lakeshore Road, Burlington, ONT L7R 4A6, Canada
AU: Blanchard, P
EM: pierrette.blanchard@ec.gc.ca
AF: Environment Canada, Dufferin Street, Toronto, ONT M3H 5T4, Canada
AU: Dryfhout-Clarke, H
EM: helena.dryfhout-Clark@ec.gc.ca
AF: Environment Canada, Dufferin Street, Toronto, ONT M3H 5T4, Canada
AU: Banic, C M
EM: cathy.banic@ec.gc.ca
AF: Environment Canada, Dufferin Street, Toronto, ONT M3H 5T4, Canada
AU: Muir, D
EM: derek.muir@ec.gc.ca
AF: Environment Canada, Lakeshore Road, Burlington, ONT L7R 4A6, Canada
AB: Particles in rural and urban air were collected at two ground sites along the Lake Ontario shoreline in Hamilton Eastport (industrial) and Pt. Petre (ambient). Weather protected filter-based high-flow PM10 and PM2.5 samplers were used. Particulate metal size distribution and abundance depends on the source and prevailing weather conditions. Trace metal content per cubic meter of air (PM10, Pt. Petre January 2005 to April 2006) was As~0.5-1.1, Cd~0.3â€"11.6, Co~0.06-0.5, Cr~1.5-10.3, Cu~50-230, Fe~50-200, Mn~1.7-6.7, Ni~0.5-3.1, Pb~2.2-7.0, Se~0.4-2.8 and Zn~14-75 ng which can generally represent ambient contributions during that time period. Annual average flux calculated (2004 dry/wet, uniform deposition velocity of 0.2 cm s-1 used for dry deposition) was 23/100, 510/2500 and 170/440 ng/m2/day for Cd, Pb & Se. Captured particulate metals from the Eastport industrial site were found to be 50-100 times ambient level. Results of particle size distribution, particulate metal content, meteorological conditions and other parameters can help to identify potential sources as well as provide better estimates of metal loading by dry/wet deposition in the Great Lakes areas of Ontario.
DE: 4251 Marine pollution (0345, 0478)
DE: 4801 Aerosols (0305, 4906)
DE: 4875 Trace elements (0489)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting