春节期间烟花爆竹燃放对PM_(2.5)化学组分的影响

The influence of fireworks and firecrackers burning on the chemical composition of PM_(2.5) during the Spring Festival

为了解太原盆地春节期间重污染天气污染特征,本研究利用在线监测数据开展太原盆地南端某市2021年春节期间污染特征分析。结果表明,采样期间PM_(2.5)平均质量浓度为105.22μg/m^(3),高于国家空气质量二级标准。采样期间有4次烟花爆竹燃放事件,该时段水溶性离子、OC、EC以及K、Fe、Al等元素浓度均出现升高,特征雷达图显示采样期间大气污染以烟花型和二次型为主。本研究提供了太原盆地春节时期PM_(2.5)浓度及其化学组分的详细分析,以期为春节时期PM2.5治理对策的制定提供依据。

Characterization of heavy air pollution during the 2021 Spring Festival were investigated based on high-resolution online monitoring data observed in a city in the southern of the Taiyuan Basin, Shanxi Province. Results showed that the average concentration of PM_(2.5) during the sampling period was 105.22 μg/m^(3), which was higher than the national secondary air quality standard. There were four fireworks activities during the sampling period, and the concentration of water-soluble ions, OC, EC, K, Fe, and Al all increased during this period. The characteristic radar chart showed that air pollution was mainly influenced by fireworks burning and secondary formation of sulfate and nitrate during the sampling period. This study analyzed PM_(2.5) concentration and its chemical components during the Spring Festival in Taiyuan Basin, which could provide a basis for formulation of PM_(2.5) control measures during the Spring Festival.