中文摘要：

为了解石油污染场地土壤中多环芳烃的赋存规律,采集具有30年石化废水排放历史的贴不贴纳污泡附近不同剖面的土壤样品,提取有机-矿质复合体,并分析复合体中多环芳烃（PAHs）的质量分数和组成分布特征.结果表明：低环多环芳烃是各级复合体中主要成分,深层土壤中低环PAHs质量分数高于高环PAHs;粘粒级复合体中多环芳烃质量分数最高,各粒级有机-矿质复合体中多环芳烃总量与有机质之间有较好的相关性.吸附是多环芳烃在土壤有机-矿质复合体中迁移转化的重要途径.

英文摘要：

Soil samples in different depths were collected from Tiebutie pool in Daqing,which was used to take up waste water from a petrochemical plant for about 30 years.The distribution and concentration of polycyclic aromatic hydrocarbons（PAHs） in organo-mineral aggregates were analyzed.Results show that the concentration of low molecular PAHs is the highest in all fractions,and the concentration of low molecular PAHs is higher than that of high molecular PAHs in deeper soil.The PAHs concentration in clay fraction is the highest, and the concentration of PAHs is related to the content of soil organic matter. Adsorption is an important transport approach for PAHs in organo -mineral aggregates.