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Characterization of gaseous pollutants and PM_(2.5) at fixed roadsides and along vehicle traveling routes in Bangkok Metropolitan Region

机译：曼谷市区固定路边和车辆行驶路线上的气态污染物和PM_（2.5）的特征

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摘要

Traffic is a major source of air pollution in urban areas of developing countries that leads to high exposure risk of urban dwellers. This study comparatively investigated levels of fine particles (PM_(2.5)). SO_2, NO_2, and BTEX (benzene, toluene, ethylbenzene and xylenes) at fixed roadsides and on traveling routes in congested urban and less congested suburban areas of Bangkok in 2010. The roadside air quality monitoring was done at two opposite sites across the selected roads. The traffic counting was made simultaneously in these roads and hourly flows of 8 different vehicle types were determined. Roadside PM_(2.5) levels during dry season were high in both the city center and suburban area, significantly above the wet season, with 65-75% measurements exceeded 24 h Thailand ambient air quality standard of 50 μg m~(-3). Oppositely, roadside BTEX levels measured in the city center during wet season were higher than dry season and well above those in suburban area. Diurnal variations and the results of SPSS (Statistical Package for the Social Sciences) analysis showed associations between roadside pollutants levels and hourly traffic flows. The differences in pollution levels between 2 monitoring sites across a road were explained by road configurations and prevalent wind directions. On-route pollution levels were measured simultaneously both inside and outside selected vehicles (van, pickup), and on motorcycle. The on-route PM_(2.5) levels along the urban route were higher during the dry season than wet season. PM_(2.5) levels inside the vehicles were lower than outside whereas the opposite was observed for BTEX. BTEX were higher on more congested urban sub-routes with lower vehicle speeds. Higher pollution levels suggest a high risk of exposure.
机译：交通是发展中国家城市地区空气污染的主要来源，导致城市居民的高暴露风险。这项研究比较研究了细颗粒（PM_（2.5））的水平。 2010年曼谷拥挤的市区和较不拥挤的郊区固定路旁和行驶路线上的SO_2，NO_2和BTEX（苯，甲苯，乙苯和二甲苯）。在选定道路的两个相对位置进行了路边空气质量监测。在这些道路上同时进行交通流量统计，并确定了8种不同类型车辆的每小时流量。在市中心和郊区，旱季的路边PM_（2.5）水平都很高，明显高于雨季，其中65-75％的测量值超过了24小时泰国环境空气质量标准50μgm〜（-3）。相反，在雨季期间，市中心测得的路边BTEX水平高于旱季，远高于郊区。日变化和SPSS（社会科学统计软件包）分析的结果表明，路边污染物水平与每小时交通流量之间存在关联。道路配置和普遍的风向解释了一条道路上两个监测点之间污染水平的差异。在选定车辆（厢式货车，皮卡车）的内部和外部以及摩托车上同时测量了道路污染水平。在干旱季节，城市路线沿途的PM_（2.5）水平高于潮湿季节。车辆内部的PM_（2.5）水平低于外部，而BTEX则相反。在交通拥挤，车速较低的城市子路，BTEX较高。较高的污染水平表明有很高的暴露风险。

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  • 来源
    《Atmospheric environment》 |2013年第10期|674-685|共12页
  • 作者

    N.T. Kim Oanh; J. Kongpran; N.T. Hang; P. Parkpian; N.T.Q. Hung; S.-B. Lee; G.-N. Bae;

  • 作者单位

    Environmental Engineering and Management, School f Environment, Resources and Development, Asian Institute of Technology, Pathumthani, Thailand;

    Environmental Engineering and Management, School f Environment, Resources and Development, Asian Institute of Technology, Pathumthani, Thailand;

    Environmental Engineering and Management, School f Environment, Resources and Development, Asian Institute of Technology, Pathumthani, Thailand;

    Environmental Engineering and Management, School f Environment, Resources and Development, Asian Institute of Technology, Pathumthani, Thailand;

    Center for Environment. Health and Welfare Research. Korea Institute of Science and Technology. Seoul. South Korea,Faculty of Environment and Resources, Nonglam University,Hochiminh City, Viet Nam;

    Center for Environment. Health and Welfare Research. Korea Institute of Science and Technology. Seoul. South Korea;

    Center for Environment. Health and Welfare Research. Korea Institute of Science and Technology. Seoul. South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    BTEX; PM_(2.5); On-route; Roadside; Bangkok; Pathumthani;

    机译：BTEX;PM_（2.5）;在路线上;路边;曼谷;巴吞他尼;

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