以海南洋浦湾海域的8个位点为监测对象,采用固相萃取法富集,超高效液相色谱(UPLC)测定表层海水中14种多环芳烃(PAHs)的含量,研究了PAHs的不同季节时空分布特征以及污染来源,并与国内外其他河口及海湾海水中PAHs质量浓度进行了比较。结果表明:洋浦湾海域水体中受到了一定程度的多环芳烃污染,14种PAHs总质量浓度范围为426.52~1 006.30 ng/L,平均总质量浓度为569.95 ng/L,其中萘的浓度最大,占PAHs总量的59.8%。2~5环PAHs分别占总浓度的59.8%、18.4%、20.6%、1.2%,5环在部分采样点中未有检出,6环均未检出。该海域PAHs含量具有明显的季节分布特征,冬季(均值690.70 ng/L)和春季(均值625.66 ng/L)PAHs含量明显高于秋季(均值481.94 ng/L)和夏季(均值481.51 ng/L),其中冬季各样点平均含量最高。旱季水体中PAHs质量浓度明显高于雨季。工业码头和港口PAHs浓度低于渡口、渔港等生活区。采用同分异构体比值法进行污染来源分析,表明春、夏、秋季洋浦湾表层水中PAHs主要来源于石油污染;冬季生活区主要为高温燃烧和石油的混合源,工业区则主要来自石油源。 Eight PAHs in the surface of seawater were measured by UPLC. The content of PAHs in surface seawater was measured by UPLC. Spatiotemporal distribution characteristics and sources of pollution in different seasons, and compared with the mass concentrations of PAHs in other estuaries and gulf waters at home and abroad. The results showed that the water body of Yangpu Bay was polluted by PAHs in a certain extent. The total PAHs concentrations ranged from 426.52 to 1006.30 ng / L with the average total mass concentration of 569.95 ng / L, of which the concentration of naphthalene was the largest , Accounting for 59.8% of the total PAHs. The 2 ~ 5 ring PAHs accounted for 59.8%, 18.4%, 20.6% and 1.2% of the total concentration, respectively, while the 5 rings were not detected in some of the sampling spots, and none of the 6 rings were detected. The content of PAHs in this area was obviously seasonal distribution. PAHs content in winter (mean 690.70 ng / L) and spring (average 625.66 ng / L) was significantly higher than that in autumn (mean 481.94 ng / L) and summer (mean 481.51 ng / L) , Of which the highest average content of various spots in winter. The concentration of PAHs in the dry season was obviously higher than that in the rainy season. Industrial docks and ports PAHs concentration lower than ferry, fishing port and other living areas. The analysis of source of pollution by isomer ratio method shows that PAHs in surface water of Yangpu Bay mainly come from oil pollution in spring, summer and autumn. In winter, the living area is mainly composed of high-temperature combustion and petroleum, while industrial area is mainly from petroleum source.