江苏句容地区土壤中多环芳烃的分布特征及来源

Distribution and sources of polycyclic aromatic hydrocarbon(PAHs) pollutants in soils of Jurong,Jiangsu Province

以江苏句容地区20个点位的土壤样品为试材,分析了该地区土壤中16种优控多环芳烃(PAHs)污染物的含量特征及污染水平。结果表明,该地区土壤中PAHs总量为5.15～375.19μg/kg,其中Flt含量最高,与西藏、北京、天津、汕头等地区相比,PAHs污染处于中等水平;土壤中PAHs以3环PAHs为主,主要单个污染物为Flt、Phe和Cry;秸秆焚烧、薪柴烹饪、燃煤取暖等人类活动是该地区多环芳烃主要来源因素,个别采样点因靠近交通干道,其多环芳烃主要来源于汽车尾气。

The experiment was conducted to analyze content and distribution of sixteen kinds of polycyclic aromatic hydrocarbons（PAHs） pollutants in 20 soil samples taken from Jurong,Jiangsu Province.The results showed that the total content of PAHs in soil ranged from 5.15-375.19 μg/kg,out of which the content of Flt was the highest.Compared with Tibet,Beijing,Tianjin and Shantou,the PAHs pollution was moderate in Jurong region.The PAHs with three rings were dominant,and Flt,Phe and Cry were the main pollutants.The main source of PAHs in the study area was combustion of straws,fire woods and coal which are closely related to human activities.Due to nearby major traffic roads,the source of PAHs in some soil samples was automobile exhaust.