| 太原市PM2.5中有机碳和元素碳的污染特征 |
| 摘要点击 5533 全文点击 2318 投稿时间：2014-06-23 修订日期：2014-09-25 |
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| 中文关键词 PM2.5 有机碳 元素碳 二次有机碳 太原市 |
| 英文关键词 PM2.5 organic carbon(OC) elemental carbon(EC) secondary organic carbon(SOC) Taiyuan |
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| 中文摘要 |
| 采集了太原市4个点位冬季和夏季PM2.5样品,利用元素分析仪测定了PM2.5中有机碳(OC)和元素碳(EC)的质量浓度,并对碳气溶胶污染水平、时空分布、二次有机碳(SOC)以及OC和EC相关性等特征进行了分析. 结果表明,太原市冬季有机碳(OC)、元素碳(EC)平均质量浓度为22.3 μg·m-3和18.3 μg·m-3,夏季OC、EC平均质量浓度为13.1 μg·m-3和9.8 μg·m-3,冬季和夏季总碳气溶胶(TCA)占PM2.5的比例分别为56.6%和36.5%; 各点位OC和EC质量浓度均呈现冬季>夏季的季节特征,冬季OC、EC浓度呈现出较好的均一性,夏季OC、EC质量浓度存在较明显的空间分布差异; 太原市SOC污染较轻; 冬季OC、EC相关性较强,夏季OC、EC相关性差. |
| 英文摘要 |
| PM2.5 samples were collected at four sampling sites to study pollution characteristics of carbonaceous aerosols in Taiyuan during winter and summer. Organic carbon (OC) and elemental carbon (EC) in PM2.5 were analyzed by carbon analyzer, and the characteristics including pollution levels, temporal and spatial distributions of OC and EC, secondary organic carbon (SOC) and relationships of OC and EC were discussed in detail. The average concentrations of OC and EC in winter were 22.3 μg·m-3 and 18.3 μg·m-3, respectively, while in summer were 13.1 μg·m-3 and 9.8 μg·m-3,respectively. The concentrations of total carbon aerosol (TCA) accounted for 56.6% of PM2.5 in winter, and 36.5% in summer; the concentrations of OC and EC at four sites in winter were higher than those in summer, OC and EC levels showed a good uniformity in winter while in summer, the spatial distributions of OC and EC were obviously different; SOC levels were lighter than other cities; the correlation between OC and EC was stronger in winter than that in summer. |
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