【摘要】 采集了西藏农村室内可吸入颗粒物样品,测得美国EPA优先控制的多环芳烃的平均浓度(aρve)为538.41 ng/m3,86.3%的多环芳烃存在于0.43~2.1μm粒径颗粒物上.苯并[a]芘/苯并[gh i]艹北和芘/苯并[a]芘的比值与其他生物质燃烧的特征值有明显差异,可用于表征室内空气中多环芳烃的牛粪饼等生物质燃烧来源.利用肺沉积模型和WHO/ICRP公布的多环芳烃相对毒性值比较了不同燃料燃烧产生的多环芳烃对人体的致肺癌危险度和不同粒径颗粒物上多环芳烃在人体呼吸系统的沉积量.结果表明,西藏民居室内0.43~1.1μm粒径颗粒物上的多环芳烃在呼吸系统的沉积量中占了最大的比例.更多还原

【Abstract】 The inhalable particles in indoor-air were sampled in rural Tibet.The average concentration(ρ_ave) of EPA priority controlled polycyclic aromatic hydrocarbons（PAHs） was 538.41 ng/m³,86.3% of PAHs cumulated on the 0.43-2.1 μm particles.The ratio of benzo[a]pyrene/benzoperylene and pyrene/benzo[a]pyrene were used to identify the biomass combustion as a major source of PAHs in indoor-air.ICRP Human Respiratory Tract Model and the relative toxicity potency of PAHs reported by WHO were used to compare the unit risk value for lung cancer of the different fuel and the PAHs depositions on human respiratory tract in different aerodynamic size were estimated.The result suggested that the PAHs of 0.43-1.1 μm fraction was the dominant in the total depositions on human respiratory tract.更多还原