摘要
在烟雾腔中光照甲苯/亚硝酸甲酯(CH3ONO)/NO混合物,模拟了羟基自由基(OH?)启动甲苯光氧化反应生成二次有机气溶胶的过程.结果表明,二次有机气溶胶的生成数量随着CH3ONO的浓度增加而增加;在CH3ONO浓度为225.4μL/L时,二次有机气溶胶的生成数量达到最大;此后,增加CH3ONO的浓度反而会降低二次有机气溶胶的粒子密度.因此,对于二次有机气溶胶的形成过程来说,存在一个羟基自由基浓度的最佳值.
In a smog chamber, the toluene/CH3ONO/NO mixtures were irradiated to simulate the formation of secondary organic aerosol （SOA） from the OH.-initiated toluene photooxidation reaction. The number of SOA particles increased with increasing of the concentration of methyl nitrate. In the case of CH3ONO of 225.4μL/L charged into the smog chamber, a maximum value of particle concentration could be reached followed by a decrease of particle numbers with increasing the concentration of methyl nitrate.There exits an optimal value of concentration for hydroxyl radical to form the secondary organic aerosol.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2006年第B07期65-67,共3页
China Environmental Science
基金
国家自然科学基金资助项目(20477043)
中国科学院知识创新工程重要方向项目(KJCX2-SW-H08)
