Abstract
Re-suspended road dust is an important contributor to ambient particulate matter (PM)particularly in an area where fugitive dust is significant emission source. This study evaluate PM-10 and PM2.5 emissions as fugitive re-suspended dust from the road network in the Thai’s Pollution Control Zone.Emissions of road dust are determined by using the analysis of silt loading and physical characteristics of theroads located in the study domain. Diurnal profile of vehicles travelling on each roads were used to calculatetemporal variation of the emission data. Diurnal pattern of PM-10 ambient concentration measured fromcurbside station in the study area was used to reveal the contribution of road dust emissions to particulateconcentration in the air. Results indicated that road dust greatly influenced the temporal profile of PM-10concentrations in this area. Therefore, the effort to control particulate emissions in this Pollution ControlZone should also give a priority not just only to the industrial sources but also to mobile source emissionsparticularly from those re-suspended road dust.
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