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| 合肥市春季大气PM10和PM2.5中碳组分的污染特征 |
| Pollution Characteristics of Organic Carbon and Elemental Carbon in PM2.5and PM10Sampled in Hefei during the Spring |
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| DOI： |
| 中文关键词: 有机碳 元素碳 PM2.5 PM10 合肥 |
| 英文关键词: Organic carbon Elemental carbon PM2.5 PM10 Hefei |
| 基金项目:安徽省环境保护科研基金资助项目（2012-005） |
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| 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 PM2.5in 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/m3 and (96.3±29.2) μg/m3,respectively. The concentrations of OC,EC in PM10were (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 pollution,while EC was usually char EC based. Coal combustion,gasoline exhaust and biomass combustion were the important pollution sources in the spring of Hefei. |
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