石家庄市2014—2018年空气质量状况分析

Analysis of Air Quality in Shijiazhuang in 2014-2018

选取石家庄市2014—2018年国控站点的空气质量数据进行分析,研究石家庄市环境空气质量变化趋势。结果表明:石家庄市空气质量整体不容乐观,存在明显的超标现象,截至2018年底,PM2.5、PM10、NO2和O3的年均指标分别超过国家二级标准浓度限值105.7%、85.7%、20.0%和31.9%。总体而言,PM2.5和PM10污染情况有所改善,污染物年均浓度、超标天数整体上呈下降趋势,但超标问题仍然比较严重,PM2.5、PM10是影响石家庄市环境空气质量达标的主要障碍,是未来大气污染控制工作中的研究重点;同时,近年O3浓度较之前有明显上升,作为首要污染物的天数也明显上升,应当予以重视。

The environmental air quality monitoring data of Shijiazhuang from 2014 to 2018 was selected to analyze the change trend of the air quality.The results showed that the air quality situation was beyond optimism.By the end of 2018,the annual average concentration of PM2.5,PM10,NO2 and O3 exceeded the national secondary standard concentration limits by 105.7%,85.7%,20.0% and 31.9% respectively.Overall,the pollution situation of PM2.5 and PM10 has been improved.The annual average concentration of pollutants and the number of days exceeding the standard have shown a downward trend.However,the problem of exceeding the standard was still serious.PM2.5 and PM10 were the targets of environmental air quality in Shijiazhuang,which would be the future research focus.At the same time,the O3 concentration has increased significantly in recent years,and the number of days of the primary pollutant has also increased significantly,which should be taken seriously.