福州市春、冬季霾日与非霾日PM_(2.5)及碳气溶胶污染水平与特征

The Pollution Degree and Characteristics of PM_(2.5) and Carbon Aerosols during Haze and No Haze Period in Fuzhou

分析和探讨了福州市春、冬季霾日和非霾日PM2.5、OC和EC盼污染特征，福州市五四北和紫阳两点位春、冬季PM2.5、OC、EC霾日的浓度水平明显高于非霾日，霾日对PM2.5、OC及Ec的影响程度相一致；PM2.5最高值均出现在霾目，并超过美国USEPA日均值65μg／m3的标准；春季的OC高于冬季，OC／EC的比值〉2．0，表明存在次生有机碳SOC，福州市区春、冬季SOC分别占OC的37％和28％，OC占PM2.5的比例为15％-26％；作为一次气溶胶的元素碳EC在大气中的浓度水平较为稳定，OC占PM2.5的比例为4％～5％；福州市环境空气中的OC和EC具有相同的来源，主要为移动污染源。

The pollution degree and characteristics of Aerosols PM2.5 , OC and EC during haze and no haze period in Fuzhou was analyzed and investigated in the paper. The concentration of aerosols PM2.5 , OC and EC during the haze period at the Wusibei and Ziyang in Fuzhou was obviously higher than that in no haze period. The haze weather has the accordant effect on PM2.5 , OC and EC ;The max concentration of PM25 was in the haze period and was in excess of the average concentration of USEPA standard which is 65μg/m3 ;The concentration of OC in spring was higher than that in winter, and the ratio of OC and EC was more than 2.0, which was indicated that the secondary organic carbon （SOC） was being. The SOC was respectively in percentage of 37% and 28% to OC in spring and winter in Fuzhou, and OC was in percentage of 15 % - 26 % to PM2.5 ; Elemental carbon （EC） as the first aerosols has the stability concentration levels in atmosphere, and OC was in percentage of 4% - 5% to PM2.5 ; The OC and EC in air in Fuzhou has the same source, which mostly was mobile sources of pollution.