Distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in street dust from the Tokyo Metropolitan area.
Distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in street dust from the Tokyo Metropolitan area.
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DOI：
10.1016/0048-9697(91)90249-e
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发表时间：
1991-09
期刊：
影响因子：
--
通讯作者：
H. Takada;Tomoko Onda;Mamoru Harada;Norio Ogura
中科院分区：
文献类型：
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作者：
H. Takada;Tomoko Onda;Mamoru Harada;Norio Ogura
通过 HPLC 分馏后的毛细管气相色谱法测定了从东京都市区收集的街道灰尘样品中多环芳烃 (PAH) 的分子分布。检测到三至六环多环芳烃和硫杂环化合物。粉尘中的多环芳烃主要由三环和四环系统组成，其中含有大量的烷基同系物。 PAHs广泛分布在街道上，其浓度（Σ COMB）为几微克/克灰尘。还分析了汽车尾气、沥青、汽油燃料、柴油燃料、轮胎颗粒、汽车曲轴箱油和大气沉降物。 PAH谱，特别是烷基PAHs和含硫杂环化合物的相对丰度，表明交通繁忙的道路街道灰尘中的PAHs主要来自汽车尾气；住宅区的灰尘对大气沉降物的贡献更大。
Molecular distributions of polycyclic aromatic hydrocarbons (PAHs) in street dust samples collected from the Tokyo Metropolitan area were determined by capillary gas chromatography following HPLC fractionation. Three-to six-ring PAHs and sulfur-heterocyclics were detected. PAHs in the dusts were dominated by three and four unsubstituted ring systems with significant amounts of their alkyl homologues. PAHs were widely distributed in the streets, with concentrations (Σ COMB) of a few μg/g dust. Automobile exhaust, asphalt, gasoline fuel, diesel fuel, tyre particles, automobile crankcase oils, and atmospheric fallout were also analysed. The PAH profile, especially the relative abundance of alkyl-PAHs and sulfur-containing heterocyclics, indicated that PAHs in the street dusts from roads carrying heavy traffic are mainly derived from automobile exhausts; dusts from r esidential areas have a more significant contribution from atmospheric fallout.