【摘要】 研究分析了位于武汉市城区附近的南望山土壤剖面样品。表层土壤检测到了美国EPA优控的16种多环芳烃,含量为991ng/g。之外还检测到了联苯、苯并[e]芘、苝、二苯并呋喃、二苯并噻吩、惹烯以及一些多环芳烃的烷基取代物。多环芳烃含量随着深度的增加急剧降低。表层土壤以萤蒽、苯并萤蒽、芘、苯并[a]芘等为主,菲次之。与高环相比,低环化合物更容易向土壤深处迁移。土壤剖面多环芳烃的分布特征、三芴系列化合物特征以及多环芳烃特征参数,土壤剖面Fluo/Pyr比值在1.4附近等,反应出所研究的土壤剖面多环芳烃主要来源于煤的高温不完全燃烧产物,兼有少量的石油污染贡献。这与武汉市以煤为主的复合型能源利用结构相符合。更多还原

【Abstract】 To investigate the pollution of polycyclic aromatic hydrocarbons(PAHs) in Wuhan,soil samples were collected from Nanwangshan for PAHs analysis.Diverse PAHs compounds were identified in soils samples,including naphthalene,acenaphthene,acenaphthylene,biphenyl,fluorine,phenanthrene,anthracene,fluoranthene,pyrene,benzo[a]anthracene,chrysene,benzofluoranthene,benzo[e] pyrene,benzo[a] pyrene,perylene,indeno[1,2,3-cd] pyrene,benzoperylene,dibenzoanthracene,dibenzofuran,dibenzothiphene and their homologous compounds.The EPA 16 priority PAHs were all detected in the surface sample.Total concentrations of EPA 16 priority PAHs which were 991 ng/g in surficial samples showed a decrease trend with depth.High-ring PAHs,such as fluoranthrene,benzofuranthrene,pyrene and benzo[a]pyrene,the ratio of Fluo/Pyr in most samples was about 1.4,show enrichment in the uppermost surface soil,in contrast with low ring compounds which could be transported into deeper soil more easily.Based upon the distribution patterns of PAHs and fluorine series,PAHs in the soil profiles of Nanwangshan could be primarily of a pyrolytic origin,together with minor contribution by petroleum pollution.The results are not contradictory with energy structure of Wuhan,where the coal is used as dominant energy.更多还原