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

Autor: Kodros JK; Institute of Chemical Engineering Sciences, ICE-HT Patras 26504 Greece athanasios.nenes@epfl.ch spyros@chemeng.upatras.gr., Kaltsonoudis C; Institute of Chemical Engineering Sciences, ICE-HT Patras 26504 Greece athanasios.nenes@epfl.ch spyros@chemeng.upatras.gr., Paglione M; Institute of Atmospheric Sciences and Climate, Italian National Research Council Bologna 40129 Italy., Florou K; Institute of Chemical Engineering Sciences, ICE-HT Patras 26504 Greece athanasios.nenes@epfl.ch spyros@chemeng.upatras.gr., Jorga S; Department of Chemical Engineering, Carnegie Mellon University Pittsburgh 15213 USA., Vasilakopoulou C; Institute of Chemical Engineering Sciences, ICE-HT Patras 26504 Greece athanasios.nenes@epfl.ch spyros@chemeng.upatras.gr.; Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA F-94010 Créteil France., Cirtog M; LISA, UMR CNRS 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace (IPSL) Créteil France., Cazaunau M; LISA, UMR CNRS 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace (IPSL) Créteil France., Picquet-Varrault B; LISA, UMR CNRS 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace (IPSL) Créteil France., Nenes A; Institute of Chemical Engineering Sciences, ICE-HT Patras 26504 Greece athanasios.nenes@epfl.ch spyros@chemeng.upatras.gr.; School of Architecture, Civil and Environmental Engineering, Swiss Federal Institute of Technology Lausanne Lausanne 1015 Switzerland., Pandis SN; Institute of Chemical Engineering Sciences, ICE-HT Patras 26504 Greece athanasios.nenes@epfl.ch spyros@chemeng.upatras.gr.; Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA F-94010 Créteil France.
Jazyk: angličtina
Zdroj: Environmental science: atmospheres [Environ Sci Atmos] 2022 Aug 23; Vol. 2 (5), pp. 1221-1236. Date of Electronic Publication: 2022 Aug 23 (Print Publication: 2022).
DOI: 10.1039/d2ea00031h
Abstrakt: 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. We performed atmospheric simulation chamber experiments on the chemical oxidation of residential biomass burning emissions under dark conditions. Biomass burning organic aerosol was found to age under dark conditions, with its oxygen-to-carbon ratio increasing by 7-34% and producing 1-38 μg m -3 of secondary organic aerosol (5-80% increase over the fresh organic aerosol) after 30 min of exposure to NO 3 radicals in the chamber (corresponding to 1-3 h of exposure to typical nighttime NO 3 radical concentrations in an urban environment). The average mass concentration of SOA formed under dark-oxidation conditions was comparable to the mass concentration formed after 3 h (equivalent to 7-10 h of ambient exposure) under ultraviolet lights (6 μg m -3 or a 47% increase over the emitted organic aerosol concentration). The dark-aging experiments showed a substantial increase in secondary nitrate aerosol (0.12-3.8 μg m -3 ), 46-100% of which is in the form of organic nitrates. The biomass burning aerosol pH remained practically constant at 2.8 throughout the experiment. This value promotes inorganic nitrate partitioning to the particulate phase, potentially contributing to the buildup of nitrate aerosol in the boundary layer and enhancing long-range transport. These results suggest that oxidation through reactions with the NO 3 radical is an additional secondary aerosol formation pathway in biomass burning emission plumes that should be accounted for in atmospheric chemical-transport models.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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