The results of the chemical analysis of PM samples show that
specific source profiles for resuspended road dust exist according to
sampling sites as well as the particle size range. It is likely that
for Al, Ca, Fe, and OC, a relatively small or approximately equal
dependence on sampling sites exists for the mass percentages of
elements in the sampled PM compared with that of the particle size
range. In view of the dependence of Zn and Cu/Sb on average hourly
traffic, it is clear that, as traffic volume increases, tire wear and
brake wear increase; accordingly, the amount of tire wear dust and
brake wear dust deposited on paved roads increases. It turned out
that OC and EC values do not change appreciably with the average
hourly traffic conditions. Nonetheless, it is noted that the OC values
of PM coarse are two or three times larger than those of PM fine,
showing a clear dependence of OC on the particle size range. In the
case of EC, however, no clear dependence of EC on the particle size
range was found.
The results of the chemical analysis of PM samples show thatspecific source profiles for resuspended road dust exist according tosampling sites as well as the particle size range. It is likely thatfor Al, Ca, Fe, and OC, a relatively small or approximately equaldependence on sampling sites exists for the mass percentages ofelements in the sampled PM compared with that of the particle sizerange. In view of the dependence of Zn and Cu/Sb on average hourlytraffic, it is clear that, as traffic volume increases, tire wear andbrake wear increase; accordingly, the amount of tire wear dust andbrake wear dust deposited on paved roads increases. It turned outthat OC and EC values do not change appreciably with the averagehourly traffic conditions. Nonetheless, it is noted that the OC valuesof PM coarse are two or three times larger than those of PM fine,showing a clear dependence of OC on the particle size range. In thecase of EC, however, no clear dependence of EC on the particle sizerange was found.
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