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首页> 外文期刊>Environmental Science & Technology >Seasonal and Annual Source Appointment of Carbonaceous Ultrafine Particulate Matter (PM_(0.1)) in Polluted California Cities
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Seasonal and Annual Source Appointment of Carbonaceous Ultrafine Particulate Matter (PM_(0.1)) in Polluted California Cities

机译：加利福尼亚污染城市的碳质超细颗粒物（PM_（0.1））的季节性和年度来源指定

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Samples of ultrafine particle matter mass (PM0.1) were collected over 12 months at three cities in California: Los Angeles, East Oakland, San Pablo, and over six months at Fresno. Molecular markers adjusted for volatility and reactivity were used to calculate PM0.1 source contributions. Wood burning was a significant source of PM0.1 organic carbon (OC) during the winter months in northern California (17-47%) but made smaller contributions in other months (0-8%) and was minor in all seasons in Los Angeles (0-5%), except December (17%) during holiday celebrations. Meat cooking was the largest source of PM0.1 OC across all sites (13-29%), followed by gasoline combustion (7-21%). Motor oil and diesel fuel combustion made smaller contributions to PM0.1 OC (3-10% and 3-7%, respectively). Unresolved sources accounted for 22-56% of the PM0.1 OC. The lack of a clear seasonal profile for this unresolved OC suggests that it may be a primary source rather than secondary organic aerosol (SOA). P-M0.1 elemental carbon (EC) was dominated by diesel fuel combustion with less than 15% contribution from other sources. All sources besides wood smoke exhibited relatively constant seasonal source contributions to PM0.1 OC reflecting approximately constant emissions over the annual cycle. Annual-average source contributions to PM0.1 OC calculated with traditional molecular markers were similar to the source contributions calculated with the modified molecular markers that account for volatility and reactivity.
机译：12个月以来，在加利福尼亚的三个城市（洛杉矶，东奥克兰，圣巴勃罗）和弗雷斯诺（Fresno）的六个月内收集了超细颗粒物质量（PM0.1）的样本。调整了挥发性和反应性的分子标记用于计算PM0.1来源贡献。在加利福尼亚北部的冬季，木材燃烧是PM0.1有机碳（OC）的重要来源（17-47％），但在其他月份的贡献较小（0-8％），在洛杉矶的所有季节均很小（0-5％），但节日庆典期间的12月（17％）除外。在所有场所中，肉类烹饪是PM0.1 OC的最大来源（13-29％），其次是汽油燃烧（7-21％）。机油和柴油燃烧对PM0.1 OC的贡献较小（分别为3-10％和3-7％）。未解决的来源占PM0.1 OC的22-56％。该未解决的OC缺乏清晰的季节性特征，表明它可能是主要来源，而不是次要有机气溶胶（SOA）。 P-M0.1元素碳（EC）以柴油燃烧为主，其他来源的贡献不足15％。除木屑烟雾外，所有来源均对PM0.1 OC表现出相对恒定的季节性源贡献，反映了全年周期中的近似恒定排放量。用传统分子标记计算的对PM0.1 OC的年平均源贡献与使用解释了挥发性和反应性的改良分​​子标记计算的源贡献相似。

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  • 来源
    《Environmental Science & Technology》 |2019年第1期|39-49|共11页
  • 作者

    Xue Jian; Xue Wei; Sowlat Mohammad H.; Sioutas Constantinos; Lolinco Annabelle; Hasson Alam; Kleeman Michael J.;

  • 作者单位

    Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA;

    Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA;

    Univ Southern Calif, Dept Civil & Environm Engn, Los Angeles, CA 90089 USA;

    Univ Southern Calif, Dept Civil & Environm Engn, Los Angeles, CA 90089 USA;

    Calif State Univ Fresno, Dept Chem, Fresno, CA 93740 USA;

    Calif State Univ Fresno, Dept Chem, Fresno, CA 93740 USA;

    Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA;

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