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首页> 外文会议>Air and Waste Management Association annual conference and exhibition >Atmospheric Simulation Chamber Studies of Secondary Organic Aerosol Formation from Photooxidation of Naphthalene under Various Conditions
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Atmospheric Simulation Chamber Studies of Secondary Organic Aerosol Formation from Photooxidation of Naphthalene under Various Conditions

机译：在各种条件下由萘的光氧化作用形成次生有机气溶胶的大气模拟室研究

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SOA formation yields from the photooxidation of naphthalene have been determined under a variety of reaction conditions. By varying the initial NO_x and naphthalene concentrations, it was shown that reactions with a higher hydrocarbon to NO_x ratio generated particles more quickly and produced higher yields of SOA. The SOA yield was also found to increase by up to a factor of 1.5 over the relative humidity range 0-50%. The results indicate that water may promote SOA formation and growth by conversion of photooxidation products into less volatile compounds via reaction in the gas or particle phase. However, detailed investigations of the chemical composition of the SOA generated under different reactions are required to confirm this possibility. The results reported in the present work and in two other studies indicate that naphthalene is a potentially large source of SOA in urban areas and should be included in atmospheric SOA models. However, as chamber experiments are not truly representative of the real atmosphere, extrapolation of the results from the present work should be treated with caution. This work also highlights the need for further detailed investigations of SOA formation from naphthalene and other PAHs under a wide variety of reaction conditions.
机译：在各种反应条件下，已经确定了由萘的光氧化而形成的SOA的产率。通过改变初始NO_x和萘的浓度，表明与较高的烃与NO_x比率的反应会更快地产生颗粒，并产生更高的SOA收率。还发现，在0-50％的相对湿度范围内，SOA的产量最多可增加1.5倍。结果表明，水可通过气相或颗粒相反应将光氧化产物转化为挥发性较小的化合物，从而促进SOA的形成和生长。但是，需要详细研究在不同反应下生成的SOA的化学组成，以确认这种可能性。本工作和其他两项研究报告的结果表明，萘是城市地区SOA的潜在巨大来源，应将其包括在大气SOA模型中。但是，由于室实验不能真正代表真实的大气，因此应谨慎对待从当前工作得出的结果进行推断。这项工作还强调了需要在各种反应条件下进一步详细研究由萘和其他PAH形成SOA的情况。

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