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首页> 外文期刊>Atmospheric research >Chemical characteristics of PM2.5-0.3 and PM0.3 and consequence of a dust storm episode at an urban site in Lebanon
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Chemical characteristics of PM2.5-0.3 and PM0.3 and consequence of a dust storm episode at an urban site in Lebanon

机译：黎巴嫩城市地区PM2.5-0.3和PM0.3的化学特征以及沙尘暴的后果

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摘要

Located on the eastern side of the Mediterranean Basin at the intersection of air masses circulating between three continents, the agglomeration of Beirut, capital of Lebanon is an important investigating area for air pollution and more studies are needed to elucidate the composition of the smallest particles classified as carcinogenic to humans. PM2.5-0.3 and PM0.3 samples were collected during the spring-summer period in an urban background site of Beirut, after a dust storm episode occurred, and their chemical composition was determined. Our findings showed that components formed by gas to particle conversion (SO42- and NH4+) and related to combustion processes are mainly found in the PM0.3 fraction. Typical crustal (Ca2+, Fe, Ti, Mg2+), sea-salt (Na+, Cl- , Mg2+, Sr) species, and NO3- are mainly associated with the PM2.5-0.3 fraction. We have also evidenced that the dust episode which occurred in Lebanon in May 2011 originated from the Iraqian and Syrian deserts, which are the least studied, and had a direct influence on the composition of PM2.5-0.3 during the beginning of the first sampling period, and then an indirect and persistent influence by the re-suspension of deposited dust particles. Moreover, PAHs concentrations were much higher in PM0.3 than in PM2.5-0.3 and their composition appeared influenced by diesel (buses, trucks and generator sets) and gasoline (private cars) emissions. (C) 2016 Elsevier B.V. All rights reserved.
机译：黎巴嫩首都贝鲁特的集聚区位于地中海盆地东侧，空气质量在三大洲之间交汇，是重要的空气污染研究区，需要更多的研究来阐明分类的最小颗粒的组成对人类致癌。在发生沙尘暴事件后的春季和夏季期间，在贝鲁特的城市背景地点收集了PM2.5-0.3和PM0.3样品，并确定了它们的化学成分。我们的发现表明，由气体到颗粒的转化形成的组分（SO42-和NH4 +）以及与燃烧过程有关的组分主要存在于PM0.3馏分中。典型的地壳（Ca2 +，Fe，Ti，Mg2 +），海盐（Na +，Cl-，Mg2 +，Sr）和NO3​​-主要与PM2.5-0.3组分相关。我们还证明，2011年5月在黎巴嫩发生的粉尘事件来自伊拉克和叙利亚沙漠，这是研究最少的沙漠，并且在首次采样开始时对PM2.5-0.3的组成有直接影响。期间，然后由于重新悬浮沉积的粉尘颗粒而产生间接和持久的影响。此外，PM0.3中的PAHs浓度远高于PM2.5-0.3中的PAHs浓度，其组成似乎受到柴油（公共汽车，卡车和发电机组）和汽油（私家车）排放的影响。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Atmospheric research》 |2016年第11期|274-286|共13页
  • 作者

    Borgie Mireille; Ledoux Frederic; Dagher Zeina; Verdin Anthony; Cazier Fabrice; Courcot Lucie; Shirali Pirouz; Greige-Gerges Helene; Courcot Dominique;

  • 作者单位

    Univ Littoral Cote dOpale, UCEIV, EA 4492, 145 Ave Maurice Schumann, F-59140 Dunkerque, France|Lebanese Univ, Doctoral Sch Sci & Technol, Bioact Mol Res Grp, Beirut, Lebanon;

    Univ Littoral Cote dOpale, UCEIV, EA 4492, 145 Ave Maurice Schumann, F-59140 Dunkerque, France;

    Lebanese Univ, Fac Sci 2, Dept Biol, Beirut, Lebanon;

    Univ Littoral Cote dOpale, UCEIV, EA 4492, 145 Ave Maurice Schumann, F-59140 Dunkerque, France;

    Univ Littoral Cote dOpale, Ctr Commun Mesures, 145 Ave Maurice Schumann, F-59140 Dunkerque, France;

    Univ Littoral Cote dOpale, Lab Oceanol & Geosci, LOG UMR 8187, 32 Ave Foch, F-62230 Wimereux, France;

    Univ Littoral Cote dOpale, UCEIV, EA 4492, 145 Ave Maurice Schumann, F-59140 Dunkerque, France;

    Lebanese Univ, Doctoral Sch Sci & Technol, Bioact Mol Res Grp, Beirut, Lebanon|Lebanese Univ, Fac Sci 2, Dept Chem & Biochem, Beirut, Lebanon;

    Univ Littoral Cote dOpale, UCEIV, EA 4492, 145 Ave Maurice Schumann, F-59140 Dunkerque, France;

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  • 正文语种 eng
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  • 关键词

    PM2.5-0.3; PM0.3; Air pollution; Dust storm; Chemical characteristics;

    机译：PM2.5-0.3;PM0.3;空气污染;沙尘暴;化学特性;

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