东北某市大气颗粒物和多环芳烃类化合物浓度及分布特点

目的:为了了解东北某工业城市大气总悬浮颗粒物质(TSP)和多环芳烃类化合物的污染现状和分布特点。方法:分别在工业区、居民区、郊区及交通干道,用大气采样器采集大气颗粒物样品。每月连续5天24小时采样,共2年。用高压液相色谱仪检测样品中8种多环芳香烃类化合物(PAHs)浓度。结果:交通干道的TSP浓度高于其他各区,而多环芳香烃化合物的浓度是以交通干道<郊区<居民区<工业区的顺序递增,其中工业区和居民区TSP中的多环芳香烃化合物浓度高于交通干道和郊区。工业区和居民区冬季TSP中的PAHs浓度高于其他各区春、夏季浓度。8种PAHs中芴(Fl)和芘(Py)的浓度最高,是苯丙(a)芘(BaP)浓度的约3倍。结论:交通干道的TSP浓度高于其他各区,而多环芳香烃化合物的浓度是以工业区的浓度最高。

Concentrations and distributions of ambient particulate matter and polycyclic aromatic hydrocarbons in an industrial city of northeastern China

Objective:To investigate pollution status and distribution characteristics of ambient total suspended particulate(TSP)and polycyclic aromatic hydrocarbons(PAHs)in an industrial city of northeast China.Methods:The TSP level in the industrial area,downtown area,main road nearby and suburb area of the city was sampled respectively by high volume air sampler(LTD HV2000).The levels of PAHs were determined by High performance Liquid Chromatography.Results:Concentration of TSP was higher in the main road than those in the other sampling areas.Concentrations of PAHs in the TSP were higher in the industrial and downtown areas than those in the other areas.The concentrations of PAHs in winter were higher industrial and downtown areas than those in spring or summer in the other areas.Concentration of fluorine(Fl)or pyrene(Py)was 3 times as higher as that of benzo(a)pyrene(BaP).Conclusions:Concentration of ambient TSP was higher on the main road than those in the other sampling areas.Concentrations of PAHs were higher in the industrial area than those in the other areas.