李坑垃圾填埋场渗滤液中COD在包气带运移模拟研究

Research on migration simulation in the aeration zone about COD from leachate of the Likeng Landfill,Guangzhou

垃圾填埋场是一种特定类型的地下水污染源,成分复杂与高浓度的有机污染是填埋场渗滤液的典型特征之一.李坑垃圾填埋场是广州市主要的4大生活垃圾填埋场之一,由于采用普通填埋方式、天然土层防渗,因此,研究渗滤液下渗对地下水的影响具有十分重要的意义.选择李坑填埋场渗滤液中COD为特征污染物,通过包气带土层的静态吸附、静态降解、动态土柱弥散实验.研究结果表明:包气带土层对污染物的吸附过程服从线性规律,降解曲线符合一级动力学方程,弥散过程符合对流—弥散迁移转化模型.进一步建立了污染物迁移数学模型,并通过模型预测渗滤池中渗滤液的COD下渗最大距离约为10 m,渗滤液的下渗将会对地下水产生污染.

Landfill is one kind of specific pollution source of ground water.Organic pollution with complex pollutant constituents and high concentration of poison is one of typical characteristics.The Likeng Landfill is one of the four largest landfills of domestic garbage in Guangzhou.Due to the using of ordinary landfill methods and natural soil seepage prevention,it is important to research groundwater pollution from landfill leachate.Having COD selected as the characteristic contaminant of the landfill leachate,w...