不同类型机动车尾气中致癌多环芳烃含量分析

Analysis of Carcinogenic PAHs Content in Different Vehicular Exhausted Gases

对柴油车、汽油车、液化石油气车、清洁燃料车等尾气中的致癌多环芳烃含量进行了测定 ,比较发现不同类型机动车在加速和怠速工况下总悬浮颗粒物和粒径为 2 5 μm可吸入颗粒物中的致癌多环芳烃的含量不同 ,未使用清洁燃料和净化器的机动车尾气中的致癌多环芳烃的含量很高。因此认为 ,使用清洁燃料并使用净化器加强机动车改造 。

The content of carcinogenic PAHs exhausted from diesel, petrol, liquefied petroleum gas and clean fuel vehicles etc. is detected. It is found by comparison that at the conditions of acceleration and idling, the carcinogenic PAHs in total suspended particles (TSP) and absorptive particles of 2.5μm have different content on different kinds of vehicles, the vehicles without using clean fuels and purifier have higher carcinogenic PAHs in exhausted gases. Thus, it is considered that clean fuels and purifier are used to rebuild vehicles so as to reduce the carcinogenic PAHs in atmosphere.