石油烃在胶州湾多介质中迁移-转化模型研究

Study on model of transport and transformation of petroleum hydrocarbons in multimedia environment in Jiaozhou Bay

在分析石油烃主要迁移-转化过程的基础上,根据化学污染物在多介质环境中迁移-转化模型的基本原理,建立了石油烃在胶州湾多介质海洋环境中迁移-转化箱式模型,主要包括大气挥发、浮游植物富集、微生物降解、悬浮颗粒物吸附和水动力交换5个迁移-转化过程。通过模型模拟与验证表明,该模型逻辑结构及动力学方程基本合理,而且所确定的模型参数也基本能够反应胶州湾海域的地域化特征。结合模型灵敏度分析表明,石油烃在胶州湾多介质海洋环境中主要决定于大气挥发、微生物降解和水动力交换等迁移-转化过程。

Based on the basic principle of dynamic model for distribution of the marine contaminates in multimedia environments, a box model for the transport and transformation of petroleum hydrocarbons in multimedia environment was constructed in Jiaozhou Bay, which was according to the summary and synthesis of the main transport and transformation. Logically it has 5 processes - bioaceumulation by phytoplankton and other aquatic organisms as well as transfer from lower to higher trophic levels in the food-webs, volatiliza- tion from water to atmosphere, biodegradation by microorganism, sorption by the suspended sediments and transport to the out sea by water exchange. The simulated seasonal successions of petroleum hydrocarbons in 2003 matched the field surveys in Jiaozhou Bay reasonably well, and the simulated average （1996 -2005 ） seasonal cycle of petroleum hydrocarbons matched the field surreys well too, which illustrated the rationality of the logic structure, dynamic equations and model parameters. From monte carlo analysis, It can see that the variation of petroleum hydrocarbons concentration was reasonably subjected to the processes such as volatilization to atmosphere, biodegradation by microorganism and transport to the Yellow Sea by the water exchange.