大气气溶胶表面化学与光学特性研究进展

大气气溶胶表面化学与光学特性研究进展

陈建民*

复旦大学全球环境变化研究所，上海，200433

复旦大学环境科学与工程系，上海，200433

*Email：jmchen@

大气气溶胶有一次排放的矿尘、黑炭（soot）、海盐等，二次气溶胶富含硫酸盐、硝酸盐、铵盐、有机物等成分。大气气溶胶作为污染物的载体或反应床，其表面界面化学反应及消光（光吸收、光散射）特性，对空气质量、大气能见度产生影响，其消光特性对气候效应产生直接影响、作为云凝结核影响成云与降雨表现出对气候效应产生间接影响。本文对近年来矿尘、黑炭、海盐、混合气溶胶与SO2、NOx、有机物、O3等大气污染物表面化学反应机理研究前沿进行了分析，特别对大气气溶胶表面变化引起的光吸收、光散射特性的变化规律进行介绍，指出该领域发展前沿难点问题及重要的研究方向。

Progress on Aerosol Surface Chemistry and its Optical Property

Jianmin Chen*

Research Institute for the Global Environment Change, Fudan University, Shanghai ,

200433

Department of Environmental Science & Engineering, Fudan University, Shanghai ,

200433

Aerosol includes primary emission such as dust, black carbon(soot), sea-salt, and secondary evolutings like sulfate, nitrate, ammonium and organics et.al. Aerosol provides surfaces serving as a carrier or reaction bed for pollutants. The atmosperic chemistry of aerosol and its optical extinction (light adsorption and scattering) during heterogeneous reaction have significantly effects on air quality, visibility. Aerosol light extinction has both direct impact on climate change through absorption and scattering of solar radiation, and indirectly, through the modification of cloud properties and wet deposition. This paper concerns recent progress on surface chemistry of heterogeneous reaction mechanism between dust, soot, sea-salt and SO2、NOx、organics、O3 et al..The focus of significant research effort has been paid on light adsorption and scattering yet remaining highly uncertain and a significantvconstraint on the evaluation of climate sensitivity.