中文摘要：

于2011年12月（冬季）在厦门九龙江河口及西港采集9个表层海水水样,采用固相萃取—气质联用方法（SPE-GC-MS）分析其中16种多环芳烃含量。研究结果表明,总溶解态态∑PAH含量为157.9～858.0 ng/L。在河口区,随着盐度升高,PAHs含量逐渐降低。基于比值法分析,表明厦门九龙江及西港海域海水中的PAHs来源存在多种途径,呈现混合来源的态势。利用LEVEL Ⅲ逸度模型研究菲,芘和苯并（a）芘在各介质间的分布以及水——气界面的交换通量。模拟结果与本文实测和文献中的实测值相吻合。在16℃时,三种多环芳烃的大气沉降通量分别为17.38,7.86和8.38μg/day/m^2。其中菲在大气沉降中占主导地位,约三分之二。三种多环芳烃的大气沉降通量均随温度升高而减少。当温度高于32℃时,苯并（a）芘开始从水体释放。

英文摘要：

The concentration of 16 polycyclic aromatic hydrocarbons（ PAHs） of nine water samples,collected in the Jiulong River Estuary in December,2011,were analyzed using the SPE-GC-MS method. The results showed that the concentration range of total dissolved PAHs（ ΣPAHs） was from 157. 9 to 858. 0 ng / L. The horizontal distribution illustrated that the concentration of ΣPAHs decreased as salinity increased. Based on ratio analysis,PAHs have complicated sources. A Level Ⅲ fugacity model was developed to simulate the multimedia fate of PAHs and to study the air-water exchange fluxes of three PAHs（ phenanthrene,pyrene,benzo[a]pyrene） in the Jiulong River Estuary. The calculated concentration of PAHs was similar to that measured in this study or reported in earlier literature. At 16℃,the net atmosphere deposition fluxes of these PAHs were 17. 38,7. 86 and 8. 38 μg / day / m^2. Phenanthrene was predominant in the atmospheric deposition. The net atmospheric deposition fluxes of these PAHs all decreased with tem-perature. When the temperature was above 32. 0℃,benzo[a]pyrene was released from the water into the air.