| SO2在CaCO3颗粒表面转化的DRIFTS研究 |
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| 引用本文： | 李雷,陈忠明,丁杰,朱彤,张远航.SO2在CaCO3颗粒表面转化的DRIFTS研究[J].光谱学与光谱分析,2004,24(12):1556-1559. |
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| 作者姓名： | 李雷 陈忠明 丁杰 朱彤 张远航 |
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| 作者单位： | 北京大学环境学院,环境模拟与污染控制国家重点联合实验室,北京,100871;北京大学环境学院,环境模拟与污染控制国家重点联合实验室,北京,100871;北京大学环境学院,环境模拟与污染控制国家重点联合实验室,北京,100871;北京大学环境学院,环境模拟与污染控制国家重点联合实验室,北京,100871;北京大学环境学院,环境模拟与污染控制国家重点联合实验室,北京,100871 |
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| 基金项目： | 国家重点基础研究发展规划 (2 0 0 2CB41 0 80 2 ,2 0 0 2CB41 0 80 1 )，国家自然科学基金 (2 0 0 770 0 1 ,2 0 1 0 70 0 1 )项目资助 |
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| 摘 要： | 碳酸钙 (CaCO3 )是大气中矿物颗粒物的重要组分 ,其非均相大气化学行为很不清楚。利用原位漫反射红外傅里叶变换光谱 (DiffuseReflectanceInfraredFourierTransformSpectroscopy ,DRIFTS)研究了二氧化硫(SO2 )在CaCO3 颗粒物表面的转化情况。通过比较不同条件下 ,亚硫酸盐和硫酸盐的原位光谱 ,探讨了SO2在CaCO3 表面氧化中臭氧 (O3 )所起的作用。结果表明 ,利用DRIFTS原位分析反应器研究CaCO3 表面硫酸盐的生成是可行的。在存在O3 条件下 ,SO2 在CaCO3 表面能够被氧化成硫酸盐 ,反应分为吸附和氧化两个步骤进行。
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| 关 键 词： | 二氧化硫 碳酸钙 表面反应 臭氧 DRIFTS |
| 文章编号： | 1000-0593(2004)12-1556-04 |
| 修稿时间： | 2004年4月26日 |
A DRIFTS Study of SO2 Oxidation on the Surface of CaCO3 Particles |
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| Lei Li,Zhong-ming Chen,Jie Ding,Tong Zhu,Yuan-hang Zhang.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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| Authors: | Lei Li Zhong-ming Chen Jie Ding Tong Zhu Yuan-hang Zhang |
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| Institution: | College of Environmental Sciences, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing 100871, China. |
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| Abstract: | CaCO 3 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 SO 2 on CaCO 3 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 O 3 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 CaCO 3 particles. The results show that in the presence of O 3, SO 2 can be oxidized into sulfate on the surface of CaCO 3 particles. A two-step mechanism that involves adsorption of SO 2 followed by oxidation is presented. |
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| Keywords: | Sulfur dioxide Calcium carbonate Surface reaction Ozone DRIFTS |
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