Secondary aerosol formation during the dark oxidation of residential biomass burning emissions

Abstract

Particulate matter from biomass burning emissions affects air quality, ecosystems and climate; however, quantifying these effects requires that the connection between primary emissions and secondary aerosol production is firmly established....

Chemical evolution of primary and secondary biomass burning aerosols during daytime and nighttime

“…2), suggesting the importance of aqueous nitrate radical reactions for oxidizing bbOA. The latter has also been observed by Kodros et al (2020) and Kodros et al (2022).…”

Wildfire plume ageing in the Photochemical Large Aerosol Chamber (PHOTO-LAC)

“…NO 2 in the presence of O 3 is partially converted into ˙NO 3 , which is the main oxidant during nighttime 52 and important in ageing of optically dense biomass burning plumes during daytime. 53 The dark ageing conditions of the flaming biomass burning aerosol resemble the experimental conditions of Kodros et al (2022), 54 but at higher biomass burning aerosol concentrations. Assuming that the majority of O 3 reacts with NO 2 , substantial generation of ˙NO 3 may be expected, particularly for the biomass burning aerosol generated under flaming conditions.…”

“…presence of O 3 is partially converted into cNO 3 , which is the main oxidant during nighttime 52 and important in ageing of optically dense biomass burning plumes during daytime. 53 The dark ageing conditions of the aming biomass burning aerosol resemble the experimental conditions of Kodros et al (2022), 54 but at higher biomass burning aerosol concentrations.…”

Characterization and dark oxidation of the emissions of a pellet stove

“…9 displays the evolution of pellet bbOA during nighttime and daytime aging in our experiments. During the daytime the OA changes chemically and aer 4 h it approaches in this space the aged under dry conditions bbOA spectrum of Kodros et al 62 and also some of the OOA factors found in winter periods. For dark aging the role of RH is evident.…”

“…This is a good assumption, given that the biomass burning aerosol pH is expected to be high enough so that most of the nitrate and chloride are in the aerosol phase. 62,67 The potassium concentration was scaled as 15% of the PM nitrate. 68 The concentrations of non-volatile cations such as sodium, calcium, and magnesium were assumed to be zero as their contribution to the sub-micrometer mode is considered to be negligible.…”