| 中国与印度典型城市道路街尘中多环芳烃与黑碳的对比研究 |
| 摘要点击 2729 全文点击 1797 投稿时间：2011-05-28 修订日期：2011-07-16 |
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| 中文关键词 中国 印度 街尘 多环芳烃 黑碳 |
| 英文关键词 China India road dust polycyclic aromatic hydrocarbons (PAHs) black carbon (BC) |
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| 中文摘要 |
| 为探讨城市道路街尘中多环芳烃(PAHs)和黑碳(BC)的分布特征,2007年12月~2009年2月,分别在中国的北京、上海、广州和武汉以及印度的加尔各答采集了城市主干道的街尘.样品处理后分别用GC-MS和元素分析仪进行测定.结果表明,中国主要城市道路街尘中PAHs的含量范围为2.30~22.2 μg·g-1,主要是以荧蒽、菲、芘、?、苯并(b)荧蒽和苯并(ghi)苝为主要的多环芳烃化合物.印度加尔各答PAHs的含量范围为4.85~30.5 μg·g-1,呈现出以2环的萘为主要的PAHs化合物.BC在中国主要城市道路街尘中的含量值高于印度的加尔各答,说明了2个国家可能的不同能源结构和能源消耗.相关分析表明,PAHs与BC在不同的城市显示出不同的特点,可能指示了不同的来源.特征比值法表明城市街尘中的PAHs主要来源于机动车排放,其次来源于燃煤. |
| 英文摘要 |
| In order to investigate the distribution characteristics of polycyclic aromatic hydrocarbons (PAHs) and black carbon (BC) in road dusts in typical cities of Beijing, Shanghai, Guangzhou and Wuhan in China and Kolcata in India, samples were collected in urban roads during Dec., 2007 to Feb., 2009. The total 16 PAHs concentrations in metro cities from China were 2.30-22.2 μg·g-1, which was dominated by FLA,PHE,PYR,CHR,BBF and BGP. PAHs contents were in the range of 4.85-30.5 μg·g-1 in Kolcata from India, which was dominated by NAP. Higher levels of BC in Chinese cities than India city were likely due to different power structures and consumes. The correlation between PAHs and BC showed different characteristics in different city, which might be reflected diverse sources. Diagnostic ratios demonstrated that the main source of PAHs was from the emission of vehicle, and coal combustion is another possible source. |
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