英文摘要:In this research, the airborne concentrations of PM10, PM2.5, SO2, NOx and CO and particle size distribution were analyzed to evaluate how these festivals influence the air quality. From chamber study of firecrackers, the major species in PM2.5 are K+、Mg2+、NO3-. The particle concrntrations were double during the festivals. The increment in fine particle concentrationwas from fireworks and that in coarse particle were due to the resuspension from paved road. The SO2, CO and NOx concentrations were also increased by several times due to the induced traffic flow. Therefore, the major contribution sources were mobile emission and resuspended dust during non-festival period and were from fireworks during festival based on the analyses by CMB. The PM2.5 and PM10 concentrations were normally about 10-40 µg/m3 and 30-50 µg/m3, respectively at the Dachia temple, the PM2.5 concentrations increased by 1.2 to 3.5 times during festivals. The increase in PM2.5 concentrations were mainly due to incense and fireworks. In order to measure the change PM concentrations, an optical particle counter (Grimn 1.107) was used on the route of crowd. The greatest PM2.5 and PM10 concentrations were 591µg/m3 and 553 µg/m3, respectively. These concentrations were about ten times greater then those during non-festival. After the crowd passing through measurement site, the airborne PM concentrations decrease quickly to those prior to the crowd. Therefore, the airbome concentrations of PM, SO2, NOx and CO were greater during festival and the contribution sources include fireworks, induced traffic, and incense.