我国部分城市大气颗粒物中多环芳烃的分布特征  

Distribution characteristics of polycyclic aromatic hydrocarbons in the airborne particles in some cities in China

作　　者：王芳[1,2] 张文煜 吴焕波[1] 陈强[1] 赵连彪[3] 

机构地区：[1]兰州大学大气科学学院半干旱气候变化教育部重点实验室,兰州730000 [2]德州学院化学化工学院,山东德州253023 [3]西北民族大学化工学院,兰州730030

出　　处：《安全与环境学报》2015年第4期318-321,共4页Journal of Safety and Environment

基　　金：甘肃省科技攻关项目(1204FKCA130);半干旱气候变化教育部重点实验室(兰州大学)开放课题

摘　　要：主要研究中国大气颗粒物中多环芳烃污染状况,对多环芳烃的浓度水平、时间和空间分布、组成及在不同粒径颗粒物上的分布特征进行了综述。北方城市大气颗粒物中多环芳烃的浓度普遍高于南方城市。大气颗粒物中多环芳烃以4~6环为主,占多环芳烃总量的60%~80%。大多数多环芳烃分布于细粒子中,且多环芳烃在PM2.5中的分布占在PM10中分布的70%以上。多环芳烃质量浓度有明显的季节变化特征,多数研究中多环芳烃浓度从高到低的季节变化规律为冬季、秋季、春季、夏季。不同功能区大气颗粒物中多环芳烃污染,城区高于郊区,交通区和工业区高于商业区、居住区和文化区。This paper is inclined to make a research on the pollution of PAHs in the airborne particle in some cities in China. For our research purpose,we have made a statistical review on the concentration level of PAHs,the spatio-temporal distribution features,the composition and the distribution characteristics of polycyclic aromatic hydrocarbons（ PAHs） in the airborne particles in different cities. The results of our investigation and statistics demonstrate that most of the research findings have been concentrated on the economically developed and densely populated cities in the eastern China,such as Beijing,Tianjin,Shanghai and Guangzhou. On the other hand,it is also necessary to strengthen the investigation and research on the polluted features of PAHs in the western provinces and autonomous regions of China. The concentrations of PAHs in the cities of northern China tend to be generally higher than the southern cities. Scientifically speaking,4-6-ring PAHs prove to be the main components of PAHs in the airborne particle samples,which accounts for 60%-80% of the total of PAHs. However,most of PAHs spread in fine particles. Among them,Over 70% of PAHs in PM10 turn out to be in the form of PM2. 5. Since PAHs appear in an obvious seasonal variation,their highest concentration tends to appear in winter,followed by autumn,spring and summer. And,for different functional areas,the concentrations of PAHs in the urban areas prove to be higher than those in the suburban areas,with much higher concentrations of PAHs in the areas with heavy traffic and transportation communications and thick industrial manufacturing activities than in the cultural,commercial or residential areas.

关 键 词：环境学 大气颗粒物 多环芳烃 季节变化 功能区 

分 类 号：X511[环境科学与工程—环境工程]