【摘要】 本文综合考虑有机污染物在土壤 -水环境体系中扩散、吸附解吸、分配以及微生物降解条件 ,建立了土壤水环境中有机污染物运移耦合的动力学模型。模型中包含了有机污染物非平衡吸附动力学过程与固相吸附污染物被微生物降解环境行为 ,并采用分裂算符方法推导出了数学模型的有限元格式 ,编制了计算程序。通过数值算例分析了油气田地区落地原油在土壤水环境中迁移转化问题 ,探讨了模型参数λ、α变化对有机污染物运移的影响 ,同时与SCOW模型进行对比分析 ,验证了数值模型的可靠性与实用性 ,这对于定量研究有机污染物在土壤 -水环境中分配与归宿以及实验室模型参数的测定提供了可靠的理论依据 ,同时为污染预测、预报与防治提供科学的根据与途径更多还原

【Abstract】 Considering the diffusion,absorption desorption,distribution and biodegradation of organic contaminants in solid water environment,the authors developed a coupling kinetic model of organic contaminants in soil water environment.The influence of non equilibrium kinetic process and biodegradation behavior in solute interface was taken into account.The finite element scheme was formulated by applying the splitting operator method(SOM).The program was utilized to analyze the crude oil translation and migration in soil water environment.The effect of the parameters λ and α in the model was discussed.A comparison analysis with the K.M.Scow’s model validated the reliablity and practicability of the model.It provides a theoretical evidence for studying distribution and inclination of organic contaminants transport in soil water environment.It also provided the scientific evidence for evaluating soil quality,forecasting contaminants transport in soil and preventing pollution.更多还原