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| 广州市冬季PM2.5污染过程二次水溶性无机离子组分特征 |
| Characteristic of the Secondary Water soluble Inorganic Ions in PM2.5 during the Winter Pollution Episode in Guangzhou |
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| DOI： |
| 中文关键词: 细颗粒物 二次离子 污染过程 组分特征 广州 |
| 英文关键词: PM2.5 SNA Pollution episode Component characteristics Guangzhou |
| 基金项目:广州市科技计划基金资助项目（201300000130） |
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| 中文摘要: |
| 为了解广州地区灰霾天气成因，基于城市超级站，对2013年12月1日—12月8日期间2次灰霾天气过程的水溶性无机离子污染特征进行研究。结果表明：监测期间二次离子(SNA)SO2-4、NO-3、NH+4分别占PM2.5质量浓度的15.8%、7.4%、7.0%；2次污染过程SNA对PM2.5贡献显著，机动车排放和燃煤是PM2.5的主要污染来源。广州冬季属于富氨区，2次污染过程都伴随着NH+4显著增加，NH+4 主要以(NH4)2SO4和NH4NO3形式存在。 |
| 英文摘要: |
| In order to understand the origin of haze in Guangzhou, the mass concentrations of water solubility ions were monitored during two haze events（1st—8th,Dec 2013）at Guangzhou Atmospheric Supersite. The results indicated as follows： The concentrations of SO2-4,NO-3 and NH+4 accounted for 15.8%, 7.4% and 7.0% of PM2.5, respectively . SNA increased significantly during two pollution process. Vehicle emission and coal combustion were the major pollution sources of PM2.5 in Guangzhou. Besides, Guangzhou belongs to rich ammonia area in winter, NH+4 increased significantly during two pollutant episode.In addition, NH+4existed in the form of (NH4)2SO4 and NH4NO3 in PM2.5 during the observation. |
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