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Sulfate formation is dominated by manganese-catalyzed oxidation of SO2 on aerosol surfaces during haze events.
- Source :
- Nature Communications; 3/31/2021, Vol. 12 Issue 1, p1-10, 10p
- Publication Year :
- 2021
-
Abstract
- The formation mechanism of aerosol sulfate during wintertime haze events in China is still largely unknown. As companions, SO<subscript>2</subscript> and transition metals are mainly emitted from coal combustion. Here, we argue that the transition metal-catalyzed oxidation of SO<subscript>2</subscript> on aerosol surfaces could be the dominant sulfate formation pathway and investigate this hypothesis by integrating chamber experiments, numerical simulations and in-field observations. Our analysis shows that the contribution of the manganese-catalyzed oxidation of SO<subscript>2</subscript> on aerosol surfaces is approximately one to two orders of magnitude larger than previously known routes, and contributes 69.2% ± 5.0% of the particulate sulfur production during haze events. This formation pathway could explain the missing source of sulfate and improve the understanding of atmospheric chemistry and climate change. Sulfate aerosols are an important component of wintertime haze events in China, but their production mechanisms are not well known. Here, the authors show that transition metal-catalyzed oxidation of SO<subscript>2</subscript> on aerosol surfaces could be the dominant sulfate formation pathway in Northern China. [ABSTRACT FROM AUTHOR]
- Subjects :
- ATMOSPHERIC chemistry
SULFATE aerosols
AEROSOLS
HAZE
SULFATES
TRANSITION metals
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 12
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 149572918
- Full Text :
- https://doi.org/10.1038/s41467-021-22091-6