许昌市空气细颗粒物(PM_(2.5))污染特征分析研究

Pollution characteristics of Air Fine Particulate Matter(PM_(2.5)) in Xuchang

利用许昌市2014年1月至12月的PM_(2.5)大气连续自动监测数据,对PM_(2.5)的污染特征、PM_(2.5)的重污染特征进行了分析。结果显示:2014年全市PM_(2.5)年均浓度为83 ug/m^3,超《环境空气质量标准》二级浓度限值1.37倍,污染季节主要集中在冬季,其次是春季、秋季,夏季明显低于冬季。2014年重污染日全市PM_(2.5)日均浓度范围为151~411 ug/m^3,全市PM_(2.5)平均浓度为201 ug/m^3,重污染日主要集中在1月和2月。

The continuous observation data of the air fine particulate matter（ PM2.5） in Xuchang from January 2014 to December 2014 were used to analyse the pollution characteristics and the heavy pollution characteristics of PM2. 5. The conclusions are：The annual concentration of PM2. 5in the city was 83 ug / m3 in 2014 which is over the ＂ambient air quality standards＂（ 3095-2012 GB） two concentration limit 1. 37 times. The pollution were mainly concentrated in the winter,followed by spring and autumn,summer was significantly lower than in winter. The average PM2. 5concentration was 151 411 ug / m3 in the city during heavy pollution days and the heavy pollution average concentration of PM2. 5was 201 ug / m3 in 2014,the heavy pollution days were mainly concentrated in January and February.