Articles | Volume 18, issue 4
Research article
19 Feb 2018
Research article |  | 19 Feb 2018

Multiphase oxidation of SO2 by NO2 on CaCO3 particles

Defeng Zhao, Xiaojuan Song, Tong Zhu, Zefeng Zhang, Yingjun Liu, and Jing Shang

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Subject: Aerosols | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

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Short summary
The oxidation of SO2 directly by NO2 on solid/liquid particles is proposed to be a major pathway of particle sulfate formation in the polluted atmosphere. We found that the reaction of SO2 and NO2 on CaCO3 particles produced Ca(NO3)2 aqueous droplets, providing a site for the multiphase oxidation of SO2. The direct multiphase oxidation of SO2 by NO2 led to a reactive uptake coefficient of SO2 on the order of 10-8, which is unlikely to be an important source of sulfate in the ambient atmosphere.
Final-revised paper