Analysis of the Impact of Fireworks and Firecrackers on PM2.5 and its Components in Shuozhou City
Based on the data of particulate matter components and conventional air pollutants in Shuozhou City,an analysis was conducted on the impact of fireworks and firecrackers on PM2.5 and its components.The results showed that during the observation period from New Year's Eve to the second day of the lunar new year in 2022,the discharge of fireworks and firecrackers caused a rapid increase in pollutant concentrations,with the largest contribution to PM2.5,accounting for 59.36%and contributing 88 μg/m3.During the concentrated combustion period,except for Ca2+,water-soluble ions(K+,SO42-,Cl-,NH4+,NO3-,Mg2+,Na+,F-)all showed an increase.Among them,the concentration of Cl-and K+changed the most(7.9 times),followed by Mg2+(3.6 times).During the concentrated combustion period,both SOR and NOR showed a certain degree of increase,with a higher degree of SO2 conversion.The correlation coefficient between Cl-and K+is highest during the concentrated combustion period(0.973),while the correlation between SO42-and NH4+is better during the non concentrated combustion period.
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