摘要
大气二次颗粒物是影响大气辐射强迫和全球气候变化最不确定的因素之一。本文总结了大气二次细颗粒物的形成机制以及吸湿增长因子的研究进展。近年来,OH·、NO3·和O3光化学氧化形成二次细颗粒物的机制较为清晰,海盐和大气矿尘表面多相反应形成硫酸盐和硝酸盐等二次无机细颗粒物的研究取得可喜进展,尤其是发现海盐和大气矿尘混合物完全不同于单组分的多相反应机制。然而,二次有机颗粒物形成过程中能够鉴定出的有机组分很少,多相酸催化对形成二次颗粒物的促进作用尚未完全确定,多组分混合大气颗粒物的吸湿增长特性亦需进一步深入研究。
Secondary fine particulate radiative forcing and global climate changes matters （ SFPM ） . Recent progress is one regardi of the most uncertain factors influencing on the ng in the formation mechanisms and hygroscopic behavior of SFPM is summarized. Formation mechanism through photooxidation of volatile organic compounds, initiated by reaction with species such as the hydroxyl radical （OH·）, nitrate radical （NO3·）, and ozone （O3）, is clear. Great progress has made recently on the heterogeneous formation mechanism of secondary fine inorganic particulate matters such as sulfate and nitrate on the sea salt and atmospheric dust, in particular, difference between single component and mixture of sea salt and dust. However, few organic compounds have been identified from secondary organic particulate matters formation as well as SFPM formation by heterogeneous acid-catalysis is uncertain. Further research on hygroscopic behavior of muhicomponent mixture is required.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2009年第2期288-296,共9页
Progress in Chemistry
基金
国家自然科学基金重点项目(No.40533017)
国家自然科学基金项目(No.40775080
40728006
40875073)
教育部科学技术研究重点项目(No.108050)资助
关键词
二次细颗粒物
机理
光化学反应
多相反应
吸湿性
secondary fine particulate matters
formation mechanism
photooxidation, heterogeneous reaction
hygroscopic behavior
