【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.更多还原

【Abstract】 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.更多还原