Pollution survey and source analysis of polycyclic aromatic hydrocarbons in the indoor air
室内空气中多环芳烃的污染特征、来源及影响因素分析

The concentrations of polycyclic aromatic hydrocarbons (PAHs) in indoor air of eight homes in Hangzhou were studied to identify the sources and measure the amounts of twelve PAHs in the summer and autumn.The samples were collected from kitchens,living rooms, bedrooms and balconies of the homes and analyzed by HPLC. The average levels of total PAHs in indoor air were between 1.91μg/m3 and 29.08μg/m3, and average concentration of the BaP was 5 ～ 19 ng/m3. The PAHs pollution in the indoor air was serious. The variations of season and ventilation affected the level of indoor air. In the indoor air, the main source of naphthalene was mothball that was used as antiseptic, and the others were from combustion. As far as the benzo(a)pyrene was concerned, the main source was the environmental tobacco smoking.