香烟、电子烟自由燃烧烟雾中挥发性有机物的排放特征

Emission characteristics of VOCs in free burning smoke of cigarettes and e-cigarettes

采用密闭实验箱开展香烟、电子烟的自由燃烧实验,利用Tenax吸附管采集箱内烟气中挥发性有机物(VOCs)样品,采用热解吸—气相色谱/质谱方法测定108种VOCs化合物,定量研究香烟、电子烟自由燃烧烟雾中VOCs的浓度、种类、特征物及排放率,结果表明:(1)香烟自由燃烧烟雾108种VOCs中臭氧前体物(PAMs)、空气毒物分别为38799.04、14658.15μg/m^(3),电子烟则分别为160.19、2650.23μg/m^(3)。(2)香烟与电子烟自由燃烧烟雾中VOCs的种类和浓度的差异主要归因于香烟与电子烟的成分、吸气行为和蒸发条件差异。(3)香烟自由燃烧烟雾中VOCs浓度最高的物质是异戊二烯(9200.41μg/m^(3))、丙烯(8269.47μg/m^(3)),电子烟则是乙醇(2502.88μg/m^(3))。香烟、电子烟自由燃烧过程中VOCs排放率分别为2969.80、312.06μg/支。

The free combustion experiments of cigarettes and e-cigarette s were carried out in a closed chamber.The samples of VOCs in the air were collected by Tenax adsorption tube,and 108 kinds of VOCs were determined by TD-GC/MS.The concentrations,species,characteristic substances and emission rates of VOCs in free burning smoke of cigarettes and e-cigarette s were quantitatively studied.Results showed that:(1)the emission concentrations of PAMs and air toxics were 38799.04,14658.15μg/m^(3) among the 108 VOCs in cigarette free burning smoke,those in e-cigarette were 160.19,2650.23μg/m^(3) respectively.(2)The differences in the types and concentrations of VOCs between cigarette smoke and e-cigarette smoke were mainly due to the differences in composition,inspiratory behavior and evaporation condition.(3)Isoprene(9200.41μg/m^(3))and propylene(8269.47μg/m^(3))were the characteristic substances of VOCs from free burning of cigarettes,and ethanol(2502.88μg/m^(3))was the characteristic substance of VOCs from free burning of e-cigarettes.The emission rates of VOCs from free burning of cigarettes and e-cigarettes were 2969.80,312.06μg/cigarette.