石狮市环境空气氮氧化物污染特征

Characteristics of Nitrogen Oxide Pollution in Ambient Air in Shishi City

本研究基于石狮市2018—2022年环境空气质量监测数据,分析了石狮市环境空气NO_(x)污染特征及主要NO_(x)污染源对NO_(x)浓度的影响。结果表明,因部分NO_(x)通过光化学反应转化为O_(3)导致的NO_(x)浓度下降对改善石狮市环境空气质量效果不大;通过采取减少狮城大道大货车流量、保障石狮市3家热电厂NO_(x)稳定排放以及在风向风速等气象条件不利情况下控制渔港渔船作业和货港货运活动NO_(x)排放等措施,可明显降低石狮市NO_(x)浓度。

This research based on the ambient air quality monitoring data of Shishi city from 2018 to 2022,the characteristics of ambient air NO_(x)pollution and the influence of major NO_(x)pollution sources on NO_(x)concentration were analyzed.The results show that the reduction of NO_(x)concentration caused by partial NO_(x)conversion to O_(3)through photochemical reaction has little effect on the improvement of ambient air quality in Shishi city.The NO_(x)concentration in Shishi city can be significantly reduced by reducing the flow of large trucks on Shicheng Avenue,ensuring the stable emission of NO_(x)from the three thermal power plants in Shishi city,and controlling the NO_(x)emission from fishing vessel operations in fishing port and freight activities in cargo port under adverse meteorological conditions such as wind direction and speed.