【摘要】 为揭示垃圾渗滤液中污染物在包气带中的迁移转化规律,通过静态吸附、静态降解、动态土柱和数学模型预测等方法进行模拟实验。结果表明,包气带对污染物的吸附过程是线性的,即S=KdC,吸附系数Kd=0.0976;降解曲线符合一级动力学方程,即C=C0e-λt,降解系数λ=0.0324d-1;弥散过程符合对流-弥散迁移转化模型,弥散系数D=0.00435m2·d-1,由此确定了污染物迁移数学模型。通过动态土柱实验验证了模型的可靠性,并利用模型对垃圾渗滤液中有机污染物(COD)的时空分布进行预测。更多还原

【Abstract】 In order to elucidate the rule of migration and transformation of pollutants of leathate in the aerated zone, the simulating experiments were conducted through static adsorption, static degradation, dynamic soil column and mathematical model perfecting in laboratory. The results showed that the process of pollutants adsorbed in aerated zone is linear, Which is represented by S=KdC, adsorption coefficient Kd=0.097 6; the biodegradation diagram accord with first-order kinetics equation C=C0e-λt, biodegradation coefficient λ=0.032 4 d-1, the process of dispersion accord with the convection-dispersion model, dispersion coefficient D=0.004 35 m2·d-1, so a migration and transformation model is established. The reliability of the model is tested by the dynamic soil column experiment, and the model will be useful to forecast the time and space distribution of COD in pollutants.更多还原