Volatile organic compounds in the atmosphere of Mexico City

被引：90

作者：

Garzon, Jessica P. ^{[1
]}

Huertas, Jose I. ^{[1
]}

Magana, Miguel ^{[2
]}

Huertas, Maria E. ^{[5
]}

Cardenas, Beatriz

Watanabe, Takuro ^{[3
]}

Maeda, Tsuneaki ^{[3
]}

Wakamatsu, Shinji ^{[4
]}

Blanco, Salvador ^{[2
]}

机构：

[1] Tecnol Monterrey, Toluca, Mexico

[2] Natl Inst Ecol & Climate Change, Mexico City, DF, Mexico

[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Japan

[4] Ehime Univ, Matsuyama, Ehime, Japan

[5] Univ Tecnol Bolivar, Cartagena, Colombia

来源：

ATMOSPHERIC ENVIRONMENT | 2015年 / 119卷

基金：

日本科学技术振兴机构;

关键词：

Volatile organic compound; Toxic volatile organic compound; Ozone; Ozone formation potential; ON-ROAD MEASUREMENTS; SOURCE APPORTIONMENT; METROPOLITAN-AREA; AIR-QUALITY; VEHICLE EMISSIONS; FLUX MEASUREMENTS; OZONE PRECURSORS; URBAN; VOC; TRANSPORT;

D O I：

10.1016/j.atmosenv.2015.08.014

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The Mexico City Metropolitan Area (MCMA) is one of the most polluted megacities in North America. Therefore, it is an excellent benchmark city to understand atmospheric chemistry and to implement pilot countermeasures. Air quality in the MCMA is not within acceptable levels, mainly due to high ground levels of ozone (O-3). Tropospheric O-3 is a secondary pollutant formed from the oxidation of volatile organic compounds (VOCs) in the presence of nitrogen oxides and sunlight. To gain a better understanding of O-3 formation in megacities, evaluate the effectiveness of already-implemented countermeasures, and identify new cost-effective alternatives to reduce tropospheric O-3 concentrations, researchers and environmental authorities require updated concentrations for a broader range of VOCs. Moreover, in an effort to protect human health and the environment, it is important to understand which VOCs exceed reference safe values or most contribute to O-3 formation, as well as to identify the most probable emission sources of those VOCs. In this work, 64 VOCs, including 36 toxic VOCs, were measured at four sites in the MCMA during 2011-2012. VOCs related to liquefied petroleum gas leakages exhibited the highest concentrations. Toxic VOCs with the highest average concentrations were acetone and ethanol. The toxic VOC benzene represented the highest risk to Mexican citizens, and toluene contributed the most to O-3 formation. Correlation analysis indicated that the measured VOCs come from vehicular emissions and solvent-related industrial sources. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：415 / 429

页数：15

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