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Seasonal Variability of Nitro-PAHs and PAHs in Ambient Air Samples Taken Close to a Major Highway in Toronto, Canada
Oral Presentation
Prepared by S. Heier1, P. Fellin2
1 - Maxxam Analytics, 6740 Campobello Rd, Mississauga, Ontario, L5N 2L8
2 - Airzone One Ltd., 222 MAtheson Boulevard East, Mississauga, Ontario, L4Z 1X1
Contact Information: sheier@maxxam.ca; 905-817-5731
ABSTRACT
A year-long study of airborne nitro-PAH and PAH is planned to determine the seasonal variations at a monitoring site near the busiest highway in Canada and also one of the busiest in North America. Traffic flows along the highway at some points reach over 500,000 vehicles per day including trucks, cars, motorcycles etc. Results from the first two seasonal sampling periods (Winter and Spring, 2013) will be presented. Nitro-PAHs and PAHs associated with airborne particulate and the gas phase are being collected using a Hi-Vol (PS1) sampler equipped with a glass fibre filter and a combination polyurethane foam (PUF) and XAD resin to trap the target compounds. Particulate and gas phase sampling media were extracted separately via a Soxhlet method with dichloromethane and extracts were then cleaned, concentrated and then analyzed by High Resolution Mass Spectroscopy (HRMS). Results will be correlated with traffic volumes as determined from Ministry of Transport data, meteorological parameters (WD and WS particularly) and other air pollutants (PM2.5, O3 and NO2) measured at nearby sites operated by MOE. The results of this preliminary investigation may indicate the need for more intensive monitoring.
Oral Presentation
Prepared by S. Heier1, P. Fellin2
1 - Maxxam Analytics, 6740 Campobello Rd, Mississauga, Ontario, L5N 2L8
2 - Airzone One Ltd., 222 MAtheson Boulevard East, Mississauga, Ontario, L4Z 1X1
Contact Information: sheier@maxxam.ca; 905-817-5731
ABSTRACT
A year-long study of airborne nitro-PAH and PAH is planned to determine the seasonal variations at a monitoring site near the busiest highway in Canada and also one of the busiest in North America. Traffic flows along the highway at some points reach over 500,000 vehicles per day including trucks, cars, motorcycles etc. Results from the first two seasonal sampling periods (Winter and Spring, 2013) will be presented. Nitro-PAHs and PAHs associated with airborne particulate and the gas phase are being collected using a Hi-Vol (PS1) sampler equipped with a glass fibre filter and a combination polyurethane foam (PUF) and XAD resin to trap the target compounds. Particulate and gas phase sampling media were extracted separately via a Soxhlet method with dichloromethane and extracts were then cleaned, concentrated and then analyzed by High Resolution Mass Spectroscopy (HRMS). Results will be correlated with traffic volumes as determined from Ministry of Transport data, meteorological parameters (WD and WS particularly) and other air pollutants (PM2.5, O3 and NO2) measured at nearby sites operated by MOE. The results of this preliminary investigation may indicate the need for more intensive monitoring.