Abstract
<p>Intermediate volatility organic compounds (IVOCs) have been proposed to be great contributors to SOA formation. In this study, we performed comprehensive measurement of ambient IVOCs and calculated their SOA production at an urban site Peking University Urban Atmospheric Environment Monitoring Stations (PKUERS). Results showed that the campaign-average concentration IVOCs was 62.5 ± 45.2 μg·m<sup>-3</sup> (average ± standard deviation), which is comparable to the emission of VOCs. Only ~10% of the IVOCs could be speciated, with most of the IVOCs existing as unresolved complex mixture (UCM). Back trajectory analysis showed that clusters from near south has the highest IVOC concentration, suggesting the importance to control the IVOC emissions from the polluted regions of China. Using the OH exposure estimated by o-xylene to benzene and m/p-xylene to benzene, the estimated daily average SOA concentration was 5.8 ±3.4 μg·m<sup>-3</sup>, in which IVOCs contributed 15 times that of single-ring aromatics. The estimated vehicular-SOA could be 1.04 ± 0.7 μg·m<sup>-3</sup>. Considering its high SOA formation potential, this study highlights the importance to study the IVOC emissions in China.</p>
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.