Sources of polycyclic aromatic hydrocarbons (PAHs) in street dust in a tropical Asian mega-city, Bangkok, Thailand
Sources of polycyclic aromatic hydrocarbons (PAHs) in street dust in a tropical Asian mega-city, Bangkok, Thailand
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DOI：
10.1016/j.scitotenv.2007.06.046
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发表时间：
2007-10-01
影响因子：
9.8
通讯作者：
Takada, Hideshige
中科院分区：
文献类型：
--
作者：
Boonyatumanond, Ruchaya;Murakami, Michio;Takada, Hideshige
我们在泰国曼谷的一个热带亚洲特大城市收集了路边空气、汽车尾气烟尘、轮胎、沥青和二手发动机油的样本，并对它们进行了多环芳烃(PAHs)和Hopanes的分析。利用多环芳烃和多环芳烃的浓度和组成来确定街道粉尘中多环芳烃的来源，其中多环芳烃是我们先前研究中报道的高浓度多环芳烃。总多环芳烃的重量浓度顺序如下：汽油车烟尘(2600+/-2900µg/g；n=4)和GT；柴油车烟尘(115+/-245µg/g；n=7)接近路边气溶胶(101+/-35µg/g；n=5)接近用过的发动机油(97+/-65µg/g；n=4)接近轮胎磨损颗粒(82+/-41µg/g；n=5)和GT；沥青(2.3+/-1.6µg/g；n=3)和GT；街道粉尘(1.1+/-0.8微克/克；n=10)。在聚类分析中，所有来源的物质与街道扬尘落下的来源不同，说明多来源物质对街道扬尘中的多环芳烃有贡献。对多环芳烃概况的多元回归分析和对多环芳烃成分的诊断表明，轮胎碎屑是街道灰尘中多环芳烃的主要贡献者，其次是柴油车尾气。(C)2007 Elsevier B.V.保留所有权利。
We collected samples of roadside air, automobile exhaust soot, tires, asphalt, and used engine oil in a tropical Asian mega-city, Bangkok, Thailand, and analyzed them for polycyclic aromatic hydrocarbons (PAHs) and hopanes. The concentrations and compositions of PAHs and hopanes were utilized to identify the sources of PAHs in street dust, in which high concentrations of PAHs were reported in our previous study. Weight-based concentrations of total PAHs had the following order: gasoline-powered vehicle soot (2600 +/- 2900 mu g/g; n=4)>diesel-powered vehicle soot (115 +/- 245 mu g/g; n=7)approximate to roadside aerosols (101 +/- 35 mu g/g; n=5)approximate to used engine oil (97 +/- 65 mu g/g; n=4)approximate to tire wear particles (82 +/- 41 mu g/g; n=5)>asphalt (2.3 +/- 1.6 mu g/g; n=3)>street dust (1.1 +/- 0.8 mu g/g; n=10). In cluster analysis, all the source materials fell into different clusters from that in which street dust fell, indicating that multiple source materials contribute to PAHs in the street dust. Multiple regression analysis of PAH profiles and diagnostics of hopane compositions identified tire debris as the major contributor of PAHs to street dust, followed by diesel vehicle exhaust. (C) 2007 Elsevier B.V. All rights reserved.