To minimize the contaminant migration in the soil, the use of two and three-layer capillary barriers is proposed as an efficient solution. Indeed, the soil can be used as a physicochemical filter for some pollutants. To discuss the effectiveness of layered soil in the reduction of organic pollutant transport, an experimental and numerical model was developed in this study.

The adsorption capacity of the cationic dye, which used as an example of adsorbed organic pollutant, in a soil (sand, clay, silty soil) has been studied in batch and fixed bed column. It was found that the concentration at the column outlet doesn't exceed 4.5% of the initial concentration after 214 days. Due to the presence of a smectite clay layer and three layer capillary barriers, the transport of dye was insignificant because of the high adsorption capacity of clay and silty soil. The experimental results were also confronted with a numerical simulation. A finite element analysis model was employed in this study to predict the coupled process of variably saturated soils by the contaminants transported in runoff.

Experimental and numerical results confirm that the water velocity and the kinetic adsorption are inversely proportional through the two and three layer barrier system.

为了最大程度地减少污染物在土壤中的迁移，建议使用两层和三层毛细管屏障作为一种有效的解决方案。实际上，土壤可以用作某些污染物的物理化学过滤器。为了讨论分层土壤在减少有机污染物迁移方面的有效性，建立了一个实验和数值模型。

在分批和固定床色谱柱中研究了阳离子染料在土壤（沙，粘土，粉质土壤）中的吸附能力，该阳离子染料被用作吸附有机污染物的实例。发现在214天后，色谱柱出口处的浓度不超过初始浓度的4.5％。由于蒙脱石粘土层和三层毛细屏障的存在，由于粘土和粉质土壤的高吸附能力，染料的运输意义不大。实验结果还面临数值模拟。在这项研究中使用了有限元分析模型来预测由径流中传输的污染物引起的饱和土壤的耦合过程。

实验和数值结果证实，水流速度和动力学吸附在两层和三层屏障系统中成反比。