Abstract:
56 fugitive dust samples from different levels of paved roads in Yanqing District of Beijing City were collected. Based on the collected activity data of vehicle flows, vehicle constitutes and road length, road fugitive dust emission factors and inventories of Yanqing District were developed following the AP-42 methodologies, and its impact factors were analyzed. The results showed that the average dust load were 0.54, 0.56, 0.71, 0.97, 1.35 and 2.55 g/m
2 for highways, national roads, provincial roads, prefectural roads, rural and village roads, respectively. The average fugitive dust emission factors of total suspended particulate (TSP), PM
10 and PM
2.5 were 16.95, 3.25 and 0.78 g/km per vehicle, whose emission inventories were 48 507, 9 311 and 2 255 t/a, respectively. Road shoulders, stable roadsides and favorable road conditions could contribute to a reduction of road fugitive dust emission. Areas with high driving mileage were concentrated in urban areas and main roads, which was almost consistent with the distribution of road fugitive dust density.