气候变化领域集成服务门户(CCPortal): Key Factors Determining Heterogeneous Uptake Kinetics of NO2 Onto Alumina: Implication for the Linkage Between Laboratory Work and Modeling Study

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DOI	10.1029/2021JD034694
	Key Factors Determining Heterogeneous Uptake Kinetics of NO2 Onto Alumina: Implication for the Linkage Between Laboratory Work and Modeling Study
	Gao X.; Zhong C.; Tang M.; Ma Q.; Liu C.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:19
英文摘要	Heterogeneous reactions on mineral dust play pivotal roles in the removal/production of gaseous pollutants and the formation of secondary particles. However, the uptake coefficient (γ), a key kinetic parameter for a heterogeneous reaction, could vary by several orders of magnitude in different laboratory analyses and give rise to great uncertainties in modeling studies. Thus, a detailed understanding of heterogeneous uptake kinetics is vital to accurately evaluate the impacts of heterogeneous reactions on atmospheric chemistry. In order to reveal the key factors affecting uptake kinetics, heterogeneous reaction of NO2 on surfaces of typical mineral component alumina (α-Al2O3, γ-Al2O3, δ-Al2O3, and AlOOH) was comprehensively studied using two widely used methods, including diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and flow tube reactor. The discrepancy between the true uptake coefficients (γBET) obtained via two techniques was within 1–2 orders of magnitude for alumina samples. The γBET depended positively on NO2 concentration in the DRIFTS measurements but negatively on NO2 concentration in the flow tube experiments, and the discrepancy might be attributed to different calculation methods of γBET, which was calculated based on nitrate formation kinetics in DRIFTS experiments while based on NO2 consumption kinetics in flow tube experiments. The results implied that an accurate selection of the uptake coefficient for modeling studies should base on the consideration of factors such as the measurement method, the concentration range of the reaction gas, and the characteristics of the sample such as crystal structure and effective surface area. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	alumina; heterogeneous reaction; mineral dust; NO2; uptake coefficient; uptake kinetics
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236962
作者单位	National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, Huaian, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of China Meteorological Administration, Chinese Academy of Meteorological Sciences, Beijing, China
推荐引用方式 GB/T 7714	Gao X.,Zhong C.,Tang M.,et al. Key Factors Determining Heterogeneous Uptake Kinetics of NO2 Onto Alumina: Implication for the Linkage Between Laboratory Work and Modeling Study[J],2021,126(19).
APA	Gao X.,Zhong C.,Tang M.,Ma Q.,&Liu C..(2021).Key Factors Determining Heterogeneous Uptake Kinetics of NO2 Onto Alumina: Implication for the Linkage Between Laboratory Work and Modeling Study.Journal of Geophysical Research: Atmospheres,126(19).
MLA	Gao X.,et al."Key Factors Determining Heterogeneous Uptake Kinetics of NO2 Onto Alumina: Implication for the Linkage Between Laboratory Work and Modeling Study".Journal of Geophysical Research: Atmospheres 126.19(2021).