Temporally and spatially resolved investigation on the efflorescence process of a mixed droplet of ammonium sulfate and ammonium nitrate  

作　　者：WANG Feng ZHENG YuXia ZHANG YunHong 

机构地区：[1]The Institute of Chemical Physics, School of Science, Beijing Institute of Technology, Beijing 100081, China [2]Chemistry Department, School of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China

出　　处：《Chinese Science Bulletin》2011年第24期2600-2603,共4页

基　　金：supported by the National Natural Science Foundation of China (20973001 and 20903036)

摘　　要：Temporally and spatially resolved investigations of the efflorescence of equimolar mixtures of ammonium sulfate (AS) and ammonium nitrate (AN) aerosol droplets were performed by confocal Raman spectroscopy combined with high-speed photography. Information was obtained on the dynamic process of morphological changes and the heterogeneous distribution of efflorescence products. The supersaturated AS/AN mixed droplet was found to first precipitate as the double salt 3AN·AS when the relative humidity was 50%. The excess AS was irregularly distributed on the surface of the double salt as an inclusion structure. No formation of 2AN·AS was observed throughout the efflorescence process.Temporally and spatially resolved investigations of the efflorescence of equimolar mixtures of ammonium sulfate （AS） and am- monium nitrate （AN） aerosol droplets were performed by confocal Raman spectroscopy combined with high-speed photography. Information was obtained on the dynamic process of morphological changes and the heterogeneous distribution of efflorescence products. The supersaturated AS/AN mixed droplet was found to first precipitate as the double salt 3AN-AS when the relative humidity was 50%. The excess AS was irregularly distributed on the surface of the double salt as an inclusion structure. No formarion of 2AN-AS was observed throughout the efflorescence process.

关 键 词：风化过程 混合物 硫酸铵 和空间 液滴 时间 硝酸铵 非均匀分布 

分 类 号：O611.3[理学—无机化学]