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首页> 外文期刊>Environmental Science & Technology >Transient Secondary Organic Aerosol Formation from Limonene Ozonolysis in Indoor Environments: Impacts of Air Exchange Rates and Initial Concentration Ratios
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Transient Secondary Organic Aerosol Formation from Limonene Ozonolysis in Indoor Environments: Impacts of Air Exchange Rates and Initial Concentration Ratios

机译：柠檬烯臭氧分解在室内环境中形成的瞬态次级有机气溶胶：空气交换速率和初始浓度比的影响。

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摘要

Secondary organic aerosol (SOA) results from the oxidation of reactive organic gases (ROGs) and is an indoor particle source. The aerosol mass fraction (AMF), a.k.a. SOA yield, quantifies the SOA forming potential of ROGs and is the ratio of generated SOA to oxidized ROG. The AMF depends on the organic aerosol concentration, as well as the prevalence of later generation reactions. AMFs have been measured in unventilated chambers or steady-state Sow through chambers. However, indoor settings have outdoor air exchange, and indoor SOA formation often occurs when ROGs are transiently emitted, for instance from emissions of cleaning products. Herein, we quantify "transient AMFs" from ozonolysis of pulse-emitted limonene in a ventilated chamber, for 18 experiments at low (0.28 h~(-1)), moderate (0.53 h~(-1)), and high (0.96 h~(-1)) air exchange rates (AER) with varying initial ozone-limonene ratios. Transient AMFs increased with the amount of ROG reacted; AMFs also increased with decreasing AERs and increasing initial ozone-limonene ratios, which together likely promoted more ozone reactions with the remaining exocyclic bond of oxidized limonene products in the SOA phase. Knowing the AER and initial ozone-limonene ratio is crucial to predict indoor transient SOA behavior accurately.
机译：二次有机气溶胶（SOA）是由反应性有机气体（ROG）氧化产生的，是室内颗粒物源。气溶胶质量分数（AMF），也就是SOA产量，可以量化ROG的SOA形成潜力，并且是所生成的SOA与氧化的ROG之比。 AMF取决于有机气溶胶浓度，以及后代反应的发生率。 AMFs已在不通风的试验箱或稳态母猪通过试验箱中进行了测量。但是，室内环境具有室外空气交换功能，当ROG瞬时发出时（例如，从清洁产品的发出中），经常会发生室内SOA的形成。在此，我们在通风室中对脉冲发射的柠檬烯进行臭氧分解来量化“瞬态AMF”，在低（0.28 h〜（-1）），中（0.53 h〜（-1））和高（0.96）的条件下进行18次实验h〜（-1））的空气交换速率（AER）随初始臭氧-柠檬烯比率的变化而变化。瞬态AMF随着反应ROG数量的增加而增加；随着AER的减少和初始臭氧-柠檬烯比率的增加，AMF也会增加，这很可能促进了更多的臭氧反应以及SOA相中氧化的柠檬烯产物的剩余环外键。了解AER和初始臭氧-柠檬烯比率对于准确预测室内瞬态SOA行为至关重要。

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  • 来源
    《Environmental Science & Technology》 |2014年第14期|7899-7908|共10页
  • 作者

    Somayeh Youssefi; Michael S. Waring;

  • 作者单位

    Department of Civil, Architectural and Environmental Engineering, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States;

    Department of Civil, Architectural and Environmental Engineering, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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