Direct emissions of particulate glyoxal and methylglyoxal from biomass burning and coal combustion.
Combustion sources
Direct emissions
Glyoxal
Methylglyoxal
Particulate
Journal
The Science of the total environment
ISSN: 1879-1026
Titre abrégé: Sci Total Environ
Pays: Netherlands
ID NLM: 0330500
Informations de publication
Date de publication:
01 Mar 2023
01 Mar 2023
Historique:
received:
22
09
2022
revised:
19
11
2022
accepted:
04
12
2022
pubmed:
13
12
2022
medline:
20
1
2023
entrez:
12
12
2022
Statut:
ppublish
Résumé
Glyoxal (Gly) and methylglyoxal (Mgly) are key precursors globally for secondary organic aerosol (SOA) formation. These two species were often thought to be formed in the atmosphere via photochemical oxidation of organics from biogenic and anthropogenic origins, although few studies have shown their direct emissions. In this study, we report direct emissions of particulate Gly and Mgly from different residential fuels typically used in north China. The emission ratios (ERs) and emission factors (EFs) of particulate Gly and Mgly for biomass burning were approximate 5-fold and 7-fold higher than those for coal combustion, respectively. The large variances in emissions of Gly and Mgly could be attributed to the different combustion processes, which influenced by the fuel types and combustion conditions. The averaged ERs and EFs of particulate Gly and Mgly were about one order of magnitude lower than their gaseous counterparts due to the low Henry's law constant, which was also consistent with the low particle-to-gas ratio of Gly (0.04) and Mgly (0.02). Our results suggest that the direct emissions of Gly and Mgly from emission sources should be considered when estimating the formation of SOA from Gly and Mgly.
Identifiants
pubmed: 36502685
pii: S0048-9697(22)07860-3
doi: 10.1016/j.scitotenv.2022.160757
pii:
doi:
Substances chimiques
Pyruvaldehyde
722KLD7415
Coal
0
Air Pollutants
0
Glyoxal
50NP6JJ975
Dust
0
Particulate Matter
0
Aerosols
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
160757Informations de copyright
Copyright © 2022 Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.