Foam can be used to achieve environmental remediation in case of contamination caused by light non aqueous phase spills. However, when it comes in contact with oily pollutants, foam becomes weaker and its life time is greatly reduced. Such weakening can be dampened by using silica particles -together with saponin surfactant- which were shown to reinforce foam in bulk and 1D sandpack experiments. Here is addressed both foam propagation in a 2D porous media when buoyancy and gravity interfere, and foam behaviour when in contact with floating oil. Therefore, macroscopic foam displacement, and specific liquid and gas phases behaviours were studied in a 2D-tank. A piston-like displacement was observed during foam propagation in the absence of oil, while foam liquid phase was influenced by gravity and did not propagate homogeneously on entire tank height. In the presence of oil, foam was partly destroyed, which increased the local permeability of gas and created new preferential paths for gas flow. This effect was partially avoided via a surfactant concentration increase, but solid colloidal particles turned out to be a more efficient stabilizing agent, by significantly increasing foam strength and its oil-tolerance.

在轻度非水相溢出物造成污染的情况下，泡沫可用于实现环境修复。但是，当它与油性污染物接触时，泡沫会变弱，并且使用寿命会大大减少。可以通过使用二氧化硅颗粒（与皂素表面活性剂一起）来减弱这种减弱作用，这些颗粒已显示出可以在大量和一维沙袋实验中增强泡沫。既解决了浮力和重力干扰时泡沫在二维多孔介质中的传播，又解决了与浮油接触时泡沫的行为。因此，在二维储罐中研究了宏观的泡沫位移以及特定的液相和气相行为。在无油的泡沫传播过程中观察到活塞状位移，而泡沫液相受重力影响，并且在整个储罐高度上均不均匀地传播。在油的存在下，泡沫被部分破坏，这增加了气体的局部渗透性，并为气体流动创造了新的优先路径。通过增加表面活性剂的浓度可以部分避免这种作用，但通过显着提高泡沫强度及其耐油性，固体胶体颗粒被证明是更有效的稳定剂。