Enhanced secondary organic aerosol formation from the photo-oxidation of mixed anthropogenic volatile organic compounds

Abstract. Vehicular exhaust is one of the important contribution sources secondary organic aerosol (SOA) in urban areas. Long-chain alkanes and aromatic hydrocarbons are included gaseous pollutants vehicle emissions, representative diesel gasoline vehicles respectively. In this work, SOA production from individual anthropogenic volatile compounds (AVOCs) (n-dodecane, 1,3,5-trimethylbenzene) mixed AVOCs (n-dodecane + was studied with a large-scale outdoor smog chamber. Results showed that formation enhanced compared to predicted mass concentration based on yield AVOCs. According results spectrometry analysis electrospray ionization time-of-flight (ESI-ToF-MS), interaction occurred between intermediate products two precursors, which could be main reason for AVOC reaction system. The study improve our understanding about precursors vehicular This also indicates further studies chemistry VOC system needed, as interactions them effect can give us formed atmosphere.