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悬浮颗粒物是普遍存在的空气污染物。液颗粒、固颗粒或液-固颗粒混存,悬浮于空气介质中,形成气溶胶,沉降速度极小,常随空气进入人的呼吸道和肺泡,危害人体健康。颗粒物特别是细颗粒内含有大量的有机、无机有害物质,其成分相当复杂。颗粒物中已知的有机物大致分为碳氢化合物,羟基化合物,含氮、含氧、含硫有机化合物,有机卤素及有机金属等。许多研究报告指出,内燃机废气颗粒物的溶剂萃取物用Ames生物实验证明具有致突变性,与木材和煤等燃料燃烧时排出的颗粒物的萃取物致突变、致癌的活性具有
Suspended particulates are ubiquitous air pollutants. Liquid particles, solid particles or liquid-solid particles mixed, suspended in the air medium, the formation of aerosols, settling rate is extremely small, often with the air into the human respiratory tract and alveoli, endangering human health. Particulates, especially fine particles contain a large number of organic and inorganic harmful substances, its composition is quite complicated. Known organic matter in particulate matter is broadly classified into hydrocarbons, hydroxyl compounds, nitrogenous, oxygenated, sulfurous organic compounds, organic halogens, and organometallics. Numerous studies have reported that solvent extracts from exhaust particulate matter of internal combustion engines have been shown to be mutagenic by Ames biological tests and mutagenized with extracts of particulate matter that are emitted when burned with fuels such as wood and coal. Carcinogenic activity has