Modeling heterogeneous chemical processes on aerosol surface

To explore the possible impact of heterogeneous chemical processes on atmospheric trace components, a coupled box model including gas-phase chemical processes, aerosol thermodynamic equilibrium processes, and heterogeneous chemical processes on the surface of dust, black carbon （BC） and sea salt is...

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Bibliographic Details
Published in:Particuology 2010-08, Vol.8 (4), p.308-318
Main Authors: Deng, Junjun, Wang, Tijian, Liu, Li, Jiang, Fei
Format: Article
Language:English
Subjects:
Aerosols
Box model
Carbon
Dust
Heterogeneous chemistry
Mathematical models
Nitrogen oxides
Sea salt
Thermodynamic equilibrium
Trace gases
Troposphere
Uptakes
化学过程
均质过程
微量成分
气溶胶浓度
耦合模型
表面吸收
非均相
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Summary:To explore the possible impact of heterogeneous chemical processes on atmospheric trace components, a coupled box model including gas-phase chemical processes, aerosol thermodynamic equilibrium processes, and heterogeneous chemical processes on the surface of dust, black carbon （BC） and sea salt is set up to simulate the effects of heterogeneous chemistry on the aerosol surface, and analyze the primary factors affecting the heterogeneous processes. Results indicate that heterogeneous chemical processes on the aerosol surface in the atmosphere will affect the concentrations of trace gases such as H2O2, HO2, O3, NO2, NO3, HNO3 and SO2, and aerosols such as SO42-, NO3- and NH4＋. Sensitivity tests suggest that the magnitude of the impact of heterogeneous processes strongly depends on aerosol concentration and the surface uptake coefficients used in the box model. However, the impact of temperature on heterogeneous chemical processes is considerably less. The ＂renoxification＂ of HNO3 will affect the components of the troPosPhere such as nitrogen oxide and ozone.
ISSN:1674-2001
1672-2515
2210-4291
DOI:10.1016/j.partic.2009.12.003