An innovative foam-based method for Fenton reagents (FR) and bacteria delivery was assessed for the in situ remediation of a petroleum hydrocarbon-contaminated unsaturated zone. The surfactant foam was first injected, then reagent solutions were delivered and propagated through the network of foam lamellae with a piston-like effect. Bench-scale experiments demonstrated the feasibility of the various treatments with hydrocarbon (HC) removal efficiencies as high as 96%. Compared to the direct injection of FR solutions, the foam-based method led to larger radii of influence and more isotropic reagents delivery, whereas it did not show any detrimental effect regarding HC oxidation. Despite 25% of HCs were expelled from the treated zone because of high foam viscosity, average degradation rates were increased by 20%. At field-scale, foam and reagent solutions injections in soil were tracked both using visual observation and differential electric resistivity tomography. The latter demonstrated the controlled delivery of the reactive solutions using the foam-based method. Even if the foam-based method duration is about 5-times longer than the direct injection of amendment solutions, it provides important benefits, such as the confinement of harmful volatile hydrocarbons during Fenton treatments, the enhanced reagents delivery and the 30% lower consumption of the latter.

对Fenton试剂（FR）和细菌传递的基于泡沫的创新方法进行了现场评估石油烃污染的不饱和带的修复。首先注入表面活性剂泡沫，然后输送试剂溶液，并通过具有活塞样作用的泡沫薄片网络进行传播。基准规模的实验证明了各种处理方法的可行性，碳氢化合物（HC）的去除效率高达96％。与直接注入FR溶液相比，基于泡沫的方法导致更大的影响半径和更多的各向同性试剂输送，而对HC氧化没有任何有害作用。尽管由于泡沫粘度高，有25％的HC从处理区排出，但平均降解率却提高了20％。在实地，使用肉眼观察和差示电阻率层析成像技术都可以跟踪泡沫和试剂溶液在土壤中的注入情况。后者证明了使用基于泡沫的方法可控制地输送反应溶液。即使基于泡沫的方法的持续时间比直接注入改性剂溶液的时间长约5倍，它也提供了重要的好处，例如在Fenton处理过程中限制了有害挥发性碳氢化合物的使用，提高了试剂的输送量以及降低了30％的消耗量。后者。