中文摘要：

2014年4月,应用热/光碳分析仪测定合肥市春季大气PM10和PM2.5中的有机碳（OC）、元素碳（EC）。结果显示,PM10、PM2.5的平均质量浓度分别为（124.0±34.3）μg/m3和（96.3±29.2）μg/m3,PM10中OC、EC的平均质量浓度分别为（15.1±5.5）μg/m3和（6.0±2.1）μg/m3,PM2.5中OC、EC的平均质量浓度分别为（12.1±3.5）μg/m3和（5.5±2.1）μg/m3。OC、EC在PM2.5中所占的比例均高于在PM10中的比例,说明合肥市春季PM2.5中碳的含量更高。通过分析8个碳组分及OC/EC比值,发现燃煤、机动车尾气和生物质燃烧是主要贡献源;OC易形成二次污染,EC排放以焦炭为主。

英文摘要：

The atmospheric particle samples PM10 and PM2. 5 in Hefei were collected in April 2014,and the concentrations of organic carbon ( OC) and elemental carbon ( EC) in PM10 and PM2. 5 samples were detected with thermal/optical carbon analyzer. The results indicated that the average mass concentrations of PM10 and PM2. 5 were (124.0 ±34.3) μg/m3and (96.3 ±29.2) μg/m3,respectively. The concentrations of OC,EC in PM10 were ( 15. 1 ± 5. 5 ) μg/m3 and ( 6. 0 ± 2. 1 ) μg/m3 . The concentrations of OC, EC in PM2. 5 were (12. 1 ± 3. 5)μg/m3 and (5. 5 ± 2. 1)μg/m3 . The percentage of OC and EC in PM2. 5 were higher than that in PM10 ,which showed that the concentrations of carbon in PM2. 5 was serious during the spring of Hefei. Based on the analysis of 8 carbon compounds and the ratios of OC/EC, OC was found to be apt to from secondary pollu-tion,while EC was usually char-EC based. Coal combustion,gasoline exhaust and biomass combustion were the important pollution sources in the spring of Hefei.