English Abstract This work gives a preliminary assessment of a possible
relationship between ambient dust, PAH, soot and fine dust: - In traffic
dominated situations PAH, soot, CO, NO and NOx are highly correlated ; fine
dust does not show any correlation with PAH and soot. - The median particle
size distribution of traffic related aerosol increases with increasing
distance from traffic streets; fresh aerosol, directly after automobile
exhausts, is circa 0.1 mum; aged aerosol, well away from the street,
increases upto some 0.2 mum. - Automatic PAH monitoring devices (based on
the photo-electric effect) and automatic soot-ones (starting from absorption
of white light due to black carbonaceous dust) show to be adequate,
continuous, in-situ total devices ; both methods however are not
component-specific.
