| Heterogeneous reaction of NO_2 on the surface of NaCl particles |
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| 作者姓名： | LI Hongjun ZHU Tong DING Jie CHEN Qi & XU Bingye State Key Joint Laboratory of Environment Simulation and Pollution Control College of Environmental Science Peking Uni- versity Beijing China |
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| 作者单位： | LI Hongjun，ZHU Tong，DING Jie，CHEN Qi & XU Bingye State Key Joint Laboratory of Environment Simulation and Pollution Control，College of Environmental Science，Peking Uni- versity，Beijing 100871，China |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金;教育部科学技术研究重点项目 |
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| 摘 要： | Sodium chloride is the major constituent of sea salt particles in atmospheric environment, with an esti- mated annual contribution of 1012 kg of sea salt parti- cles to the atmosphere1]. Many studies have shown a significant chloride deficit in these particles when compared to bulk seawater2,3]. This deficit has been attributed to reactions with NOx and SO24]. Simulta- neously, NO2 is one of the main pollutants of mobile vehicles. Reaction (1) may be particularly important to the atmosph…
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Heterogeneous reaction of NO2 on the surface of NaCl particles |
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| LI Hongjun,ZHU Tong,DING Jie,CHEN Qi & XU Bingye State Key Joint Laboratory of Environment Simulation and Pollution Control,College of Environmental Science,Peking Uni- versity,Beijing ,China.Heterogeneous reaction of NO_2 on the surface of NaCl particles[J].Science in China(Chemistry),2006,49(4). |
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| Authors: | LI Hongjun ZHU Tong DING Jie CHEN Qi XU Bingye |
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| Abstract: | The heterogeneous reaction of NO2 on NaCl particles has been investigated with the new sample preparation and the mode of gas-solid free diffusion. Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) is used to characterize the adsorbed products in situ, combined with Ion Chromatographic (IC), X-ray Photoelectron Spectroscopy (XPS) and Scan Electron Microscopy (SEM). Our results indicate that the reaction is not limited to the surface of the NaCl particles, but penetrated into the upper layers. Surface reactive sites determine the reaction. Kinetic measurements show that nitrate formation on sodium chloride is second order in NO2 concentration and reactive uptake coefficient is (1.54 ± 0.70) × 10-5. |
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| Keywords: | DRIFTS gas-solid diffusion heterogeneous reaction reaction order reactive uptake coefficient |
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