某化工厂废液COD_(Cr)在包气带中的迁移规律及数值模拟  

A study of the migration of factory pollutants COD_(Cr) in the vadose zone using numerical simulation methods

作　　者：庞雅婕[1] 刘长礼[1] 王翠玲[1] 张云[1] 裴丽欣[1] 侯宏冰[1] 王志良[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,河北正定050803

出　　处：《水文地质工程地质》2013年第3期115-120,共6页Hydrogeology & Engineering Geology

基　　金：国家科技支撑计划课题(2012BAJ11B04)

摘　　要：为揭示精对苯二甲酸工厂废液在粉土包气带中的吸附、降解和迁移规律、迁移速度,通过静态吸附、厌氧降解以及土柱淋滤实验,确定土壤水化学参数及溶质反应参数,结合数学模型和模拟软件进行研究。实验结果为:包气带粉土对废水CODCr的吸附可以用线性方程表示,分配系数为0.155cm3g;对CODCr的降解系数λ为0.009 7d-1;CODCr在土柱中迁移的纵向弥散度为0.15cm。通过HYDRUS-1D软件模拟CODCr迁移曲线,拟合值与实测值对照结果良好;使用该模型对CODCr浓度的运移预测表明,包气带厚为17m时,CODCr浓度为4 000mgL时以1m定水头持续淋滤情况下经过11.63a可到达潜水面。The pattern of adsorption,degradation and migration of CODCr of the wastewater was examined through the static batch experiments and the soil column methods,and the parameters required with the numerical simulation were obtained.As a result,the partition coefficients,longitudinal dispersivity and the first-order degradation coefficient of CODCr on silt were 0.155cm3/g,0.15cm,and 0.009 7/d,respectively.The migration of CODCr in the soil columns was simulated with the Hydrus-1D software.The results show that a good correlation exists between the measured values and the simulated ones.The migration depths within different times were predicted by the correspondence mathematical models.

关 键 词：包气带 污染物 精对苯二甲酸 HYDRUS-1D 

分 类 号：X13[环境科学与工程—环境科学]