| 光谱学与光谱分析 |
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| A DRIFTS Study of SO2 Oxidation on the Surface of CaCO3 Particles |
| LI Lei, CHEN Zhong-ming*, DING Jie, ZHU Tong, ZHANG Yuan-hang |
| College of Environmental Sciences, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing 100871, China |
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Abstract CaCO3 is an important component of mineral dust aerosols in the atmosphere, but its role in atmospheric heterogeneous chemistry is still unclear. In this paper, the oxidation of SO2 on CaCO3 particles was studied using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). Formation of sulfite and sulfate was identified on the surface, and the role of O3 on the oxidation process is determined by comparing the experiments in different conditions. DRIFTS is proved as a useful tool for studying heterogeneous reactions on CaCO3 particles. The results show that in the presence of O3, SO2 can be oxidized into sulfate on the surface of CaCO3 particles. A two-step mechanism that involves adsorption of SO2 followed by oxidation is presented.
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Received: 2004-04-26
Accepted: 2004-09-12
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Corresponding Authors:
CHEN Zhong-ming
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| Cite this article: |
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LI Lei,CHEN Zhong-ming,DING Jie, et al. A DRIFTS Study of SO2 Oxidation on the Surface of CaCO3 Particles [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(12): 1556-1559.
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http://www.gpxygpfx.com/EN/Y2004/V24/I12/1556 |
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