[Effect of ammonium sulfate aerosol on the photochemical reaction of toluene/ NO(x)/air mixture].
The effect of ammonium sulfate aerosol on the photochemical reaction of toluene/NO(x)/air mixture was evaluated with Tsinghua Smog Chamber facility. The results indicate that the presence of concentrated preexisting ammonium sulfate aerosol shortens the time to reach maximum PM (particle matter) concentration and increases the aerosol yield of toluene. And under the presence of high concentrated ammonium sulfate aerosol seed, the concentration of aerosol does not have significant effects on NO(x), NO and O3 variation, but affects the formation of secondary organic aerosol (SOA). The SOA yield increases with the increasing initial ammonium sulfate seed concentration (< 160 microg x m(-3)). From the minimum 7.2% to the maximum 11.7%, the percentage increase of SOA yield is more than 60%.
Wu
Shan
S
Department of Evironmental Science and Engineering, Tsinghua University, Beijing 100084, China. wu-s03@mails.tsinghua.edu.cn
Hao
Ji-Ming
JM
Lü
Zi-Feng
ZF
Zhao
Zhe
Z
Li
Jun-Hua
JH
D000336:Aerosols; D000393:Air Pollutants / Q000737:chemistry; D000645:Ammonium Sulfate / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry*; D010084:Oxidation-Reduction; D010316:Particle Size; D010777:Photochemistry; D014050:Toluene / Q000737:chemistry*
D000336:Aerosols; D000393:Air Pollutants; D009589:Nitrogen Oxides; D014050:Toluene; D000645:Ammonium Sulfate