二次有机气溶胶相态的研究现状与展望

发布时间：2018-06-21 06:47

本文选题：二次有机气溶胶(SOA) + 相态　；参考：《中国环境科学》2017年05期

【摘要】：总结了国内外对二次有机气溶胶(SOA)相态的研究进展,结果显示不同条件下SOA可能是固态、不定形态、液态.固态和不定形态SOA的体相扩散系数远低于液态SOA,从而阻碍SOA的物质传输和化学转化等物理化学过程.目前,SOA相态的研究主要集中在有限体系,例如α-蒎烯、异戊二烯、甲苯等挥发性有机物为前体物产生的SOA,缺乏实际大气SOA的相态信息.此外,对无机盐影响SOA相态的认识也十分有限.本文提出重污染形成过程中,相态可能是二次颗粒物快速增长、转化的重要影响因素之一.因此,结合外场观测、实验室研究以及多层动力学模型研究重污染形成过程中SOA的相态及其对关键反应活性气体的吸附、传输等影响机制,有助于深入理解我国复合大气污染条件下二次颗粒物的生成转化机制.
[Abstract]:The research progress of secondary organic aerosol (SOA) phase at home and abroad is summarized. The results show that SOA may be solid, indeterminate and liquid under different conditions. The bulk diffusion coefficient of solid and indefinite SOA is much lower than that of liquid SOA, which hinders the physical and chemical processes such as material transport and chemical transformation of SOA. At present, the study of SOA phase state is mainly focused on the limited system, such as 伪 -pinene, isoprene, toluene and so on volatile organic compounds as precursors of SOA, lack of actual atmospheric SOA phase state information. In addition, the effect of inorganic salts on SOA phase is also very limited. In this paper, it is suggested that the phase state may be one of the important factors influencing the rapid growth and transformation of secondary particles during the formation of heavy pollution. Therefore, in combination with field observations, laboratory studies and multilayer dynamics models, the phase behavior of SOA during the formation of heavy pollution and its mechanism of adsorption and transport of key reactive active gases are studied. It is helpful to understand the formation and transformation mechanism of secondary particulate matter under the condition of complex air pollution in China.
【作者单位】：北京大学环境科学与工程学院环境模拟与污染控制国家重点联合实验室;
【基金】：国家自然基金资助项目(41475127,41571130021,91544214,21190052,41121004) 国家“973”项目(2013CB228503);环境保护部公益项目(201409010) 环境模拟与污染控制国家重点联合实验室专项经费资助项目(14L02ESPC)
【分类号】：X513

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