SOURCE-RECEPTOR MODELING USING TRACE-METALS IN AEROSOLS COLLECTED AT 3 RURAL CANADIAN GREAT-LAKES SAMPLING STATIONS

High-volume air samplers were used to collect aerosol samples on Whatm an 41 air filters at the Canadian air sampling stations Burnt Island, Egbert, and Point Petre. The samples were analyzed for trace elements by neutron activation analysis. Air concentrations of over 30 trace el ements were determined. Factor analysis; elemental ratios, and enrichm ent factor analysis were used to determine source-receptor relationshi ps at the three different sites. Factor analysis exhibited trends that indicate oil and coal combustion, road salt, mining, incineration, an d smelting as anthropogenic sources to aerosols of the rural Great Lak es. Elemental ratios showed that the Na to Cl ratio in the Great Lakes aerosol is similar to that found in sea water. Enrichment factor anal ysis revealed elements with non-crustal sources including the elements Ag, As, Br, Cl, Cu, I, In, Sb, Se, Sn, W, and Zn.