| 深圳市郊区大气中PM2.5的特征分析 |
| 摘要点击 4353 全文点击 2191 投稿时间：2011-07-22 修订日期：2012-01-16 |
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| 中文关键词 PM2.5 水溶性离子 多环芳烃 变化规律 源解析 |
| 英文关键词 PM2.5 water-soluble ions PAHs seasonal and daily variations source identification |
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| 中文摘要 |
| 为了确定深圳市郊区大气中PM2.5的污染特征,本研究分析了2009年和2010年夏季和冬季PM2.5样品中的水溶性离子和多环芳烃成分.结果表明,深圳市郊区大气中PM2.5的质量浓度很高,夏季53.9%和冬季100%的样品超过了WHO的大气质量准则浓度.PM2.5中,冬季最主要的3种离子是SO42-、NO3-和NH4+.在夏季,这3种离子在PM2.5中的含量都会减少,而Cl-、Na+、K+、Ca2+和Mg2+的含量会增多.另外,冬季是多环芳烃浓度较高的季节,其中萘、苊烯、苊和苯并荧蒽是冬季PM2.5中多环芳烃的主要成分.本研究还通过比值法和特征化合物法对深圳市郊区大气中的PM2.5进行了源解析,确定了PM2.5的可能来源. |
| 英文摘要 |
| In this study, PM2.5 samples had been measured from the summer of 2009 to the winter of 2010 in a suburb of Shenzhen. The results indicated serious PM2.5 pollution in the suburb of Shenzhen. Seasonal and daily variations of water-soluble ions were discussed. SO42-, NO3- and NH4+ were the most abundant ions in winter. In summer, the average contributions of Cl-, Na+, K+, Ca2+ and Mg2+ increased significantly, while SO42-, NO3- and NH4+ decreased. Furthermore, Naphthalene, acenaphthylene, acenaphthene and benzo fluoranthene were the major PAHs in PM2.5. Ratio analysis and characteristic compounds analysis were also used to determine the possible sources of PM2.5 in the suburb of Shenzhen. |
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