Abstract

Field measurements of the concentrations of oxygenated organics in urban air and in forest were carried out. The results were used to test the model of atmospheric transformation of biogenic compounds. The simulation showed that condensable compounds of several classes are formed: hydroperoxides, peroxides, alkylperoxynitrates and nitrites, peracids. Their aerosol-generating potential was evaluated on the basis of the calculated steady-state concentrations of the direct precursors of aerosol phase. It was discovered that the main precursors of the nuclei of solid phase are hydroperoxides and peracids. The reason of their efficiency is their photolysis with the formation of oxygenated free radicals, which initiate gas-to-particle conversion through polymerization of unsaturated compounds via the free radical mechanism.

中文翻译：

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生物有机化合物的大气光氧化产物的气溶胶产生潜能

摘要

进行了城市空气和森林中含氧有机物浓度的现场测量。结果用于测试生物化合物大气转化的模型。模拟表明，形成了几类可冷凝的化合物：氢过氧化物，过氧化物，烷基过氧硝酸盐和亚硝酸盐，过酸。在计算出的气溶胶相直接前体的稳态浓度的基础上，评估了其气溶胶生成潜能。发现固相核的主要前体是氢过氧化物和过酸。其效率的原因是它们通过形成氧合自由基而发生光解，该自由基通过不饱和化合物通过自由基机理的聚合而引发了气体到颗粒的转化。