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本文研究菲涂在硅胶或烟尘上与NO_2的暗反应和光化学反应,藉色谱和GC/MS分析反应产物。暗反应以取代反应为主,主要产物是硝基菲.光反应的产物为2,2′-二甲酰基联苯、亚硝基-2-甲酰基联苯等,在UV辐照下以光氧化裂解为主。菲涂在硅胶上或涂在烟尘上与NO_2的暗反应的明显差异可能是由于吸附在硅胶上的水分子与菲对NO_2的竞争反应。产物的Ames试验指出,无致突性的菲与NO_2反应可较容易地生成有直接致突性的二次污染物,对人体健康更有危害。
In this paper, the dark reaction and photochemical reaction of phenanthrene on NO2 with silica gel or soot were studied. The reaction products were analyzed by chromatography and GC / MS. The dark reaction is dominated by the substitution reaction, and the major product is nitrophenanthrene The products of the photoreaction are 2,2’-diformylbiphenyl, nitroso-2-formylbiphenyl and the like, irradiated with UV light Oxidative cracking mainly. The obvious difference in the dark reaction of phenanthrene coated on silica gel or coated with soot may be due to the competitive reaction of water molecule adsorbed on silica with phenanthrene to NO 2. Ames test of the product pointed out that the non-mutagenic phenanthrene and NO 2 reaction can be more easily generated secondary to direct mutagenic pollutants, more harmful to human health.