Smog chamber experiments were conducted to explore the photochemical degradation of allyl acetate (AA) in the presence of SO₂ and to assess the role of NOx on the secondary organic aerosol (SOA) formation potential. A one-product gas-particle partitioning absorption model was used to express the formed organic aerosol. The experimental results showed a clear dependence of SOA formation potential on the NOx level. The particle mass concentrations at low NOx conditions (AA/NOx > 3) were commonly higher than those at high NOx conditions (AA/NOx < 3). The SOA yields increased with the increasing NOx concentration under low NOx conditions and decreased with the increasing NOx concentration under high NOx conditions due to the different reaction pathways of RO₂ radicals. Gas chromatography-mass spectrometry (GC-MS) and Fourier transform infrared spectroscopy-attenuated total reflection (FTIR-ATR) analysis suggested that organic nitrates and organic sulfates were formed during photochemistry experiments. Based on detected products, the mechanisms of AA photooxidation were proposed. The results of this study show the different effects of NOx concentrations on promoting and inhibiting aerosol formation, and highlight the pronounced formation of SOA from the photooxidation of AA in polluted environment.

进行了雾化室实验，以探索在SO ₂存在下乙酸烯丙酯（AA）的光化学降解，并评估NO x对次要有机气溶胶（SOA）形成潜力的作用。使用一种产品的气体颗粒分配吸收模型来表达形成的有机气溶胶。实验结果表明SOA形成电位对NO明确依赖性X水平。在低NO x条件下（AA / NO x  > 3）的颗粒质量浓度通常高于在高NO x条件下（AA / NO x  <3）的颗粒质量浓度。SOA的产率日益增加的NO增加X低NO浓度下X的条件和与所述增加NO减少X高NO下浓度X由于RO的不同反应途径的条件₂的基团。气相色谱-质谱（GC-MS）和傅里叶变换红外光谱-衰减全反射（FTIR-ATR）分析表明，在光化学实验过程中形成了有机硝酸盐和有机硫酸盐。基于检测到的产物，提出了AA光氧化的机理。这项研究的结果表明，NO的不同影响X关于促进和抑制形成气溶胶浓度，并强调SOA从AA的污染环境的光氧化形成明显。