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| 摘要: |
| 对2012年郑州市大气中气态和颗粒态多环芳烃（PAH<sub>s</sub>）的分布特征与来源进行了分析。结果表明，ρ（∑PAH<sub>s</sub>） （包括气相与颗粒相）为23.27～194.61 ng/m<sup>3</sup>，气相中∑PAH<sub>s</sub>高于颗粒相，四环以下的PAH<sub>s</sub>大都存在于气态中；在夏、春2季，较小分子质量（≤178）的PAH<sub>s</sub>占比较高，冬季，较大分子质量（≥252）的PAHs占比明显较高；各功能区ρ（PAH<sub>s</sub>）排序为工业区＞交通密集区＞医疗、文化、行政混合区。郑州大气和颗粒物中PAH<sub>s</sub>可能主要来自煤和液体燃料（汽油柴油）的燃烧。 |
| 关键词: 环境空气 气态多环芳烃 颗粒态多环芳烃 来源解析 郑州 |
| DOI： |
| 分类号:X513 |
| 基金项目:2011年河南省科技攻关重点基金资助项目（11210231005） |
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| Distribution Characteristics and Source Apportionment of PAHs in Atmosphere and Particulates in Zhengzhou |
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ZHANG Dan， NAN Shu qing， WANG Wei si， ZHAO Xin na， DUO Ke xin， ZHANG Jun
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| Abstract: |
| This work analyzed the distribution characteristics and sources of both gaseous and particulate polycyclic aromatic hydrocarbons (PAH<sub>s</sub>) in urban atmosphere of Zhengzhou City in 2012. The results showed that the total mass concentration of PAH<sub>s</sub> in atmosphere， including gaseous and particulate， was between 40.00 to 194.61 ng/m<sup>3</sup>， and that mass concentration of gaseous PAHs was higher than that of the particulate forms. PAH<sub>s</sub> containing less than four aromatic rings mainly existed in gaseous forms. In spring and summer， a relatively high proportion of PAH<sub>s</sub> were molecules having masses below 178， while in winter， this was the case with PAH<sub>s</sub> having molecular masses above 252. Mass concentration of PAH<sub>s</sub> decreased with the following functional areas: industrial area， traffic compact area， and living area. The major sources of gaseous and particulate PAH<sub>s</sub> in atmosphere were possibly from the burning of coal and liquid fuel (gasoline and diesel oil). |
| Key words: Ambient air Gaseous polycyclic aromatic hydrocarbon Particulate polycyclic aromatic hydrocarbon Source apportionment Zhengzhou |
