Guaiacol Nitration in a Simulated Atmospheric Aerosol with an Emphasis on Atmospheric Nitrophenol Formation Mechanisms.
Journal
ACS earth & space chemistry
ISSN: 2472-3452
Titre abrégé: ACS Earth Space Chem
Pays: United States
ID NLM: 101695267
Informations de publication
Date de publication:
20 May 2021
20 May 2021
Historique:
received:
18
01
2021
revised:
23
03
2021
accepted:
26
03
2021
entrez:
4
6
2021
pubmed:
5
6
2021
medline:
5
6
2021
Statut:
ppublish
Résumé
Atmospheric nitrophenols are pollutants of concern due to their toxicity and light-absorption characteristics and their low reactivity resulting in relatively long residence times in the environment. We investigate multiphase nitrophenol formation from guaiacol in a simulated atmospheric aerosol and support observations with the corresponding chemical mechanisms. The maximal secondary organic aerosol (SOA) yield (42%) is obtained under illumination at 80% relative humidity. Among the identified nitrophenols, 4-nitrocatechol (3.6% yield) is the prevailing species in the particulate phase. The results point to the role of water in catechol and further 4-nitrocatechol formation from guaiacol. In addition, a new pathway of dark nitrophenol formation is suggested, which prevailed in dry air and roughly yielded 1% nitroguaiacols. Furthermore, the proposed mechanism possibly leads to oligomer formation via a phenoxy radical formation by oxidation with HONO.
Identifiants
pubmed: 34084985
doi: 10.1021/acsearthspacechem.1c00014
pmc: PMC8161671
doi:
Types de publication
Journal Article
Langues
eng
Pagination
1083-1093Informations de copyright
© 2021 The Authors. Published by American Chemical Society.
Déclaration de conflit d'intérêts
The authors declare no competing financial interest.
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