【摘要】 <正> 空气中颗粒物的粒径从几十埃到几百微米,差别很大。近年来由于消烟除尘技术的改进,空气中细颗粒与粗颗粒的比率逐年增高。经研究表明,对人体健康影响较大的颗粒物,其粒径小于10微米,称之为可吸入颗粒物(Inhalable Partides简写IP,总颗粒物简写TSP)。人们还发现较多的重金属、硫酸盐及多环芳烃均集中在细颗粒上。这些成份具有潜在的致突变及致癌作用。国内近年来已开始这方面的研究。我们在大连市测定了TSP和IP浓度,并得出更多还原

【Abstract】 The mean concentration of inhalable particles (IP) in the air of Dalian city was 0.17mg/m~3 and was in direct correlation with the pollution level of total suspended particles (TSP). IP amounted to 50% of TSP.The concentrations of various harmful components were different in IP and TSP and were higher in winter than in other seasons.The mean levels of IP, B(a) P, Pb and Cd in dormitories were 0.36 mg/m~3, 2.72μg/100m~3,0.81μg/m~3 and 0.006μg/m~3 res-peetively. Their concentrations were higher in kitchens than in bedrooms and were also higher in winter更多还原