邯郸市大气PM_(2.5)成分空间分布研究

ANALYSIS OF THE SPACE DISTRIBUTION OF COMPOSITION OF PM_(2.5) IN HANDAN

为研究邯郸市2015年PM_(2.5)的污染状况,采用河北工程大学监测站全年PM_(2.5)浓度和气象在线监测数据以及4个代表月4个站点离线采样成分数据,分析了PM_(2.5)的浓度水平与气象要素的关系以及其化学组分特征。结果表明:PM_(2.5)的年均浓度为91.14μg/m^3,最高达到706.56μg/m^3;不同相对湿度条件下,PM_(2.5)浓度对邯郸地区能见度有较大影响。此外,邯郸静风频率较大,全年东南风风速较小,PM_(2.5)污染相对更加严重;PM_(2.5)中主要化学成分为SO_4^(2-)、NO_3^-和NH_4^+、OC和EC,4个站点采样无显著差异性。

The purpose of this paper was to investigate the pollution situation of PM2.5 in Handan,2015. This study used the year-round concentrations of PM2.5 and meteorological online data monitored in Hebei University of Engineering,as well as the four representative months of PM2.5 of chemical compositions data,which collected from four sampling sites in Handan. Based on this information,the article analysed the PM2.5 concentration level,the correlation with meteorological parameters,and the characteristic of chemical compositions of PM2.5. It indicated that the average annual concentration of PM2.5 was 91. 14 μg/m^3,in addition,the highest concentration in winter reached 706. 56 μg/m^3. The concentration of PM2.5 had greater effect on visibility under the different relative humidity. Moreover,the frequency of calmer wind was bigger. Since the annual southeast wind speed was smaller,the concentration of PM2.5 was relative more serious. Finaly,the main chemical compositions of PM2.5 were SO4^2-、NO3^-、NH4^＋、OC and EC,and there was no significant difference between the four sampling sites.