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利用LevelⅢ逸度模型模拟了稳态假设下菲在长江口中大气、水体、沉积物和植物中的分布,根据模拟结果计算了相间迁移通量,并通过灵敏度分析确定了模型的关键参数.结果表明,大气平流是研究区菲的主要来源,大气和水的平流输出则是菲从研究区环境中消失的主要途径;在反应损失中,气相中的反应损失最大,沉积物的反应损失最小;大气是菲的主要储库,占总菲含量的86.36%,但浓度仅为0.5×10-7 mol.m-3;沉积相和植物相中菲的浓度较高,分别为1.5×10-6 mol.m-3和4.4×10-6 mol.m-3,表明两者是菲主要的“汇”;菲在各介质的分布主要受控于分配系数和沉降速率的影响.
The Level III fugacity model was used to simulate the distribution of phenanthrene in the atmosphere, water body, sediment and plant in the Yangtze Estuary under the steady-state hypothesis. The phase migration flux was calculated according to the simulation results and the key parameters of the model were determined by sensitivity analysis. , Atmospheric advection is the main source of phenanthrene in the study area, and the advection output of air and water is the main way that phenanthrene vanishes from the environment of the study area. In the reaction loss, the reaction loss in the gas phase is the largest and the reaction loss in the sediment is the smallest. Atmospheric Is the main reservoir of phenanthrene, accounting for 86.36% of the total phenanthrene content, but the concentration is only 0.5 × 10-7 mol.m -3; the concentration of phenanthrene in the sedimentary facies and plant phases is higher, which are respectively 1.5 × 10-6 mol .m-3 and 4.4 × 10-6 mol.m-3, respectively, indicating that the two are the major “sinks” of phenanthrene. The distribution of phenanthrene in each medium is mainly controlled by the partition coefficient and sedimentation rate.