泉州湾表层沉积物中多环芳烃的含量分布特征及污染来源

DISTRIBUTION AND SOURCE OF POLYCYCLIC AROMATIC HYDROCARBONS IN THE SURFACE SEDIMENTS OF QUANZHOU BAY,CHINA

采用气相色谱-质谱联用(GC-MS)方法,对泉州湾表层沉积物中16种优先控制多环芳烃(PAHs)进行定量分析,采用LMW/HMW、BaA/(BaA+Chr)、InP/(InP+BgP)、Ppi等特定比值对PAHs来源进行分析.结果表明,沉积物中PAHs的总含量在182.8—721.1 ng.g-1之间,以3—5环为主;PAHs在表层沉积物中的含量分布总体呈现为泉州湾南岸高于北岸、内湾高于外湾;沉积物中PAHs主要来自高温不完全燃烧.与国内外其它海域相比,泉州湾PAHs处于中等污染水平,该区域表层沉积物中的PAHs对生物不存在明显的毒性效应,但具有潜在的毒副作用.

The concentrations of 16 polycyclic aromatic hydrocarbons（PAHs） in the surface sediments of Quanzhou Bay,China,were measured with gas chromatography-mass spectrometry（GC-MS）.Source-specific PAHs indexes,including LMW/HMW,BaA/（BaA＋Chr）,InP/（InP＋BgP） and Ppi,were used to identify the potential sources of PAHs in this region.The total contents of PAHs in the sediments were in the range of 182.8—721.1 ng · g-1,which were dominated by PAHs of 3—5 rings.The concentration of PAHs in the Bay was higher in the south bank than in the north bank,and higher in the inner bay than in the outer bay as well.The indexes of source identification indicated that incomplete combustion was the dominant source of PAHs in this study.The pollution of PAHs in the Bay was moderate compared with other regions in the world.PAHs in the surface sediments in this area would not cause remarkably negative effects on marine organisms,but potential negative effects should not be overlooked.