论文部分内容阅读
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/m2。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。
Nine surface seawater samples were collected from surface waters of Jiulong River estuary and West Harbor of Xiamen in December 2011 (winter), and 16 PAHs were analyzed by SPE-GC-MS. The results show that the total dissolved ΣΣA content of 157.9 ~ 858.0 ng / L. In estuarine areas, PAHs levels gradually decreased as salinity increased. Based on the ratio method analysis, it shows that there are many ways for the source of PAHs in the seawater of Xiamen Jiulongjiang and West Harbor, showing a mixed source. The LEVEL III fugacity model was used to study the distribution of phenanthrene, pyrene and benzo (a) pyrene in various media and the exchange fluxes at the water-air interface. The simulation results coincide with the measured data in this paper and in the literature. At 16 ℃, the atmospheric deposition fluxes of the three PAHs were 17.38, 7.86 and 8.38 μg / day / m2, respectively. Among them, Philippine dominate in the atmosphere subsidence, about two-thirds. Atmospheric deposition fluxes of three PAHs decreased with increasing temperature. Benzo (a) pyrene begins to release from the body of water at temperatures above 32 ° C.