A comprehensive observation-based multiphase chemical model analysis of sulfur dioxide oxidations in both summer and winter
2021
Abstract. Sulfate is one of the main components of haze fine particles, and its
formation mechanism remains controversial. A lack of detailed and
comprehensive field data hinders the accurate evaluation of relative roles
of prevailing sulfate formation pathways. Here, we analyzed the sulfate
production rates using a state-of-the-art multiphase model constrained to the
observed concentrations of transition metal, nitrogen dioxide, ozone,
hydrogen peroxide and other important parameters in winter and summer in
the North China Plain. Our results showed that aqueous transition metal ion (TMI)-catalyzed
oxidation was the most important pathway followed by the surface oxidation
of Mn in both winter and summer while the hydroxyl and Criegee radical
oxidations contribute significantly in summer. In addition, we also modeled
the published cases for the fog and cloud conditions. It is found that
nitrogen dioxide oxidation is the dominant pathway for the fog in a higher
pH range while hydroperoxide and ozone oxidations dominated for the cloud.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
88
References
0
Citations
NaN
KQI