摘要
本文重点评述了二次有机气溶胶形成的气体/粒子分配理论,简要介绍了它的发展和可能的应用。在大气中,气体有机物种的氧化可以产生半挥发性的有机化合物,二次有机气溶胶的形成可以用气体/粒子分配的吸收模型来评估。气体/粒子分配过程决定于半挥发性化合物的成分、浓度和蒸气压,以及吸收性材料的浓度和成分。在气体/粒子分配理论的基础上,人们又研究和开发出二次有机气溶胶的分子组分的气体/粒子分配的热力学模型,它可以用来预估气溶胶中液态水的含量、无机物的分布、亲水性和疏水性有机物的分布。二次有机气溶胶形成的化学机理和气体/粒子分配的热力学模型与加利福尼亚工学院三维都市/区域性大气模型相结合,可以用于气相和气溶胶相模拟。
The paper reviews the gas/particle partitioning theory for secondray organic aerosol formation and describes its development and possible applications. In atmosphere, semi-volatile organic compounds are formed through oxidation of certain gas-phase organic species and the secondray organic aerosol formation may be best described by a gas/ particle partitioning absorption model. The process of gas/particle partitioning is dependent on both the composition, concentration and vapor pressure of semi-volatile species, and the concentration and composition of absorptive materials. On the basis of gas/particle partitioning theory, the thermodynamic model for gas/particle partitioning of molecular constituents has also been developed. This model can be used to predict the liquid water contents in aerosol, distributions of inorganic compounds and hydrophilic/hydrophobic organic compounds. The combination of the chemistry mechanism and the thermodynamic model for secondary organic aerosol formation with the California Institute of Technology （ CIT）＇s three-dimensional urban/regional atmospheric model could be used to perform comprehensive gas- and aerosol- phase simulations.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2007年第1期93-100,共8页
Progress in Chemistry
基金
国家自然科学基金项目(No.20477043)
中国科学院创新项目(KJCX2-SW-H08)资助
关键词
二次有机气溶胶
气体/粒子分配
热力学模型
secondary organic aerosol
gas/particle partitioning
thermodynamic model
