多环芳烃在某工业园区周边环境介质中的分布

The Distribution of PAHs in Environment-media around an Industrial Zone

采集并分析了位于某工业园区下风向2个村庄周围的土壤、积尘、空气、地下水和地表水样品中16种PAHs的浓度。发现以大气扩散和空气颗粒物沉降方式进入环境的PAHs,在各环境介质中的浓度为:积尘>土壤>空气>地下水和地表水。通过分析样品中多环芳烃的组分发现:不同环境介质中PAHs的组分差异较大,而在两个村相同环境介质中组分较为相似。通过分析树脂吸附、颗粒物截留2种方式所采集的空气样品发现:二、三环多环芳烃主要存在于气相,五环以上的主要存在于颗粒物,四环在两相中同时存在。通过轮廓图法推测:所调查的2个村多环芳烃类污染物的主要来源相同。通过特征成分比值法发现:2个村空气颗粒物中的多环芳烃主要来源于燃煤污染源。

Soil,dust,air,groundwater and surface water samples were collected form two villages which are located nearby an industrial zone. The concentration of 16 PAHs in those samples were determined,and it was found that the concentration of PAHs,which spread with atmospheric diffusion and particle settlement,in those samples is ranked as dust soils air groundwater and surface water. It was also found that components of PAHs are similar in the same environment-media,but are diverse in different environment-media. According to the analysis of air sampled by resin adsorption and particle retention,bicyclic and tricyclic PAHs mainly distribute in vapor phase;pentacyclic（or higher-） PAHs mainly distribute in particles;and tetracyclic PAHs distribute in both phases. Through profilogram method,it is speculated that PAHs of the villages come from the same sources. By using characteristic components ratio method,it was found that the PAHs in atmospheric particles for both villages are generated mainly by coal-fired pollutions.