Study of the day- and night-time SOA formation from the oxidation of furans and PAHs performed in an oxidation flow reactor

Abstract : Biomass burning significantly contributes to the concentration levels of ambient primary particulate matter (PM) especially in wintertime due to residential wood burning (Vicente et al., 2018). This source also emits large quantities of volatile and semi-volatile organic compounds leading to the formation, via (photo- ) chemical and condensation processes, of secondary organic aerosols (SOA) accounting for a significant part of fine PM concentrations. However, SOA physicochemical properties and formation yields from the corresponding precursors are still poorly documented in the literature particularly regarding nighttime chemistry (involving nitrate radical) (Bruns et al., 2016). The main aim of this work is to study the formation of biomass burning SOA from typical organic precursors namely PAHs and furans, under both daytime and nighttime chemistry.