Impact of fuel uses in the formation and prevention of global secondary organic aerosol

Azmi, Sahir; Sharma, Mukesh; Nagar, Pavan K.

doi:10.1016/j.atmosres.2023.106798

Cited by 3 publications

(1 citation statement)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Secondary organic aerosol (SOA) accounts for a significant proportion, ranging from 20% to 80%, of atmospheric organic aerosols, exerting noteworthy impacts on climate forcing, human health and air quality. − Conventional model predictions, however, tend to underestimate SOA yields, potentially attributable to the partial oversight of reaction mechanisms. , Many recent studies have revealed that the aqueous-phase reactions within atmospheric clouds/fogs and wet aerosol particles might serve as an important source of SOA, and the SOA generated via the aqueous-phase process (aqSOA) tends to exhibit a higher degree of oxidation. − Consequently, investigating the formation of SOA in the atmospheric aqueous phase holds paramount importance in bridging the gap between observed and modeled SOA concentrations.…”

Section: Introductionmentioning

confidence: 99%

Aqueous-Phase Photooxidation of Vanillin in the Presence of Nitrite: Characteristics, Products, and Mechanism

Cai,

Zhao,

et al. 2024

ACS EST Air

View full text Add to dashboard Cite

The present study investigates the reaction characteristics and mechanisms involved in the aqueous-phase photooxidation of vanillin (VL) in the presence of nitrite (NO 2 − ). The research entails a comprehensive analysis of the decay kinetics of VL, the composition of reaction products, and changes in absorbance under different pH conditions and VL/NO 2 − molar ratios. The results indicate a notably rapid decay rate of VL under acidic conditions, with the VL/NO 2 − molar ratio emerging as a crucial factor in the photooxidation process. Notably, the photoreaction between VL and NO 2 − leads to the formation of aqueous-phase secondary organic aerosols (aqSOA) comprising hydroxylation products, nitration products, and oligomers that exhibit strong absorption in the near-ultraviolet and visible light regions. The research findings, through theoretical calculations, shed light on the reaction pathways involved in the photooxidation process. This investigation contributes valuable insights into the atmospheric aqueous-phase photooxidation of phenolic compounds initiated by NO 2 − . The obtained results are particularly significant for understanding the formation and evolution of aqSOA and brown carbon (BrC).

show abstract