| 南宁市多环境介质中多环芳烃分布特征 |
| 摘要点击 3275 全文点击 1384 投稿时间：2016-03-31 修订日期：2016-06-20 |
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| 中文关键词 多环境介质 多环芳烃 分布特征 南宁 第四系 |
| 英文关键词 multiple environmental media polycyclic aromatic hydrocarbon distribution characteristic Nanning quaternary |
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| 中文摘要 |
| 为了确定多环境介质中多环芳烃的浓度、组成和分布特征，采集南宁市冬夏季空气、大气干湿沉降物、土壤和地下水样品，利用16种多环芳烃的成分谱，结合其物理化学性质，分析多环芳烃在多环境介质中的浓度、组成和分布特征，结果表明：①空气和大气干湿沉降物中PAHs均以2~3环为主，由于冬夏季节差异性，冬季∑PAHs浓度高于夏季；②土壤中PAHs以2~3环为主，且土壤颗粒粒径分布差异性是导致不同层位PAHs分布特征差异的主要原因；③地下水中PAHs检出种类少，检出量小，也表明土壤包气带能够“截留”较多的PAHs；④16种PAHs在不同环境介质中质量分数均呈现由低环向高环递减的趋势，且两地区冬夏季2~3环和5~6环PAHs在各环境介质中分布特征具有较好的一致性，但也有一定的差异.这与PAHs的理化性质、水文地质条件、城市污染状况、天气状况等方面有关. |
| 英文摘要 |
| In order to understand the contamination characteristics of polycyclic aromatic hydrocarbons in different environmental media, the authors collected samples of air, atmospheric dry and wet depositions, soil and groundwater in winter and summer in Nanning, using component spectra of 16 kinds of polycyclic aromatic hydrocarbons, combining with the physical and chemical properties, analyzed concentration, composition and distribution characteristics of the PAHs in different environment media, the results showed that PAHs with 2 to 3 rings were dominant in the air and atmospheric dry and wet depositions, and ∑ PAHs in winter were higher than in summer because of the seasonal differences. And PAHs with 2 to 3 rings were dominant in soil, too. Distribution difference of soil particle diameter was the main reason for the PAHs distribution characteristics in different horizons. And species of PAHs in groundwater were fewer, with lower concentrations, which showed that soil vadose zone could entrap more PAHs. The mass fraction of 16 kinds of polycyclic aromatic hydrocarbons in different environmental media presented a decreasing trend from low rings to high rings, and the distribution characteristics of PAHs with 2 to 3 rings and 5 to 6 rings in different environmental media in two areas in winter and summer had good consistency, but also had certain differences because of the physical and chemical properties of PAHs, hydro-geological conditions, urban pollution, weather conditions, etc. |
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