Analysis of the Influence of Fireworks on the Air Quality of Yongzhou City during Spring Festival
Based on the hourly concentration data of various pollutants during the Spring Festival in Yongzhou City from 2018 to 2022,this study further analyzed the impact of fireworks on ambient air quality through concentration analysis,component analysis,correlation analysis and relative ratio analysis.The results showed that the pollution weather during the Spring Festival in Yongzhou City from 2018 to 2022 was mainly concentrated on the New Year's Eve and the first day of the year.The rising time of pollutant concentration is consistent with fireworks setting off time.The hourly maximum concentration of PM2.5 was as high as 184 μg/m3,with the highest increase of 1 410％.During the discharge period,K+,Mg2+,Ca2+and Cl-plasma increased sig-nificantly,and were related to the high concentration of particulate matter.Among them,the maximum concentration of K+,a characteristic ion set off by fireworks and firecrackers,reached 21.6 μg/m3,which was about 7 times that of conventional clean weather.The results of relative ratio analysis showed that the contribution of fireworks and firecrackers to the increase of particulate matter concentration is greater,and the contribution of fireworks and firecrackers to PM2.5 and PM10 concentration during the concentrated discharge period in 2022 was 6.2％～52.7％and 0.9％～52.0％,respectively.The concentration of par-ticulate matter contributed by fireworks and the measured concentration showed a high consistency in the hourly variation trend,and the fireworks and firecrackers display was the main reason affecting the air quality in Yongzhou during the Spring Festival.
NETL
NSTL
万方数据
