A vehicle-mounted dual-smog chamber: Characterization and its preliminary application to evolutionary simulation of photochemical processes in a quasi-realistic atmosphere

Smog chambers are the effective tools for studying formation mechanisms of air pollution. Simulations by traditional smog chambers differ to a large extent from real atmospheric conditions, including light, temperature and atmospheric composition. However, the exist-ing parameters for mechanism interpretation are derived from the traditional smog cham-bers. To address the gap between the traditional laboratory simulations and the photochem-istry in the real atmosphere, a vehicle-mounted indoor-outdoor dual-smog chamber (JNU-VMDSC) was developed, which can be quickly transferred to the desired sites to simulate quasi-realistic atmosphere simultaneously in both chambers using local air. Multiple key parameters of the smog chamber were characterized in the study, demonstrating that JNU-VMDSC meets the requirements of general atmospheric chemistry simulation studies. Ad-ditionally, the preliminary results for the photochemical simulations of quasi-realistic at-mospheres in Pearl River Delta region and Nanling Mountains are consistent with literature reports on the photochemistry in this region. JNU-VMDSC provides a convenient and reli-able experimental device and means to study the mechanism of atmospheric photochem-ical reactions to obtain near-real results, and will make a great contribution to the control of composite air pollution.(c) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

Automated summary

Vehicle-mounted indoor-outdoor dual-smog chamber (JNU-VMDSC) is an effective tool for studying the formation mechanisms of air pollution. It can simulate quasi-realistic atmospheric conditions and meets the requirements of general atmospheric chemistry simulation studies. The preliminary results of photochemical simulations using JNU-VMDSC are consistent with literature reports and it provides a convenient and reliable means to study atmospheric photochemical reactions and control composite air pollution.