FOREY, Natacha; ATTEIA, Olivier; OMARI, Abdelaziz; BERTIN, Henri

doi:10.1016/j.jconhyd.2020.103761

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FOREY, Natacha
Institut de Mécanique et d'Ingénierie [I2M]

ATTEIA, Olivier

Géoressources et environnement

OMARI, Abdelaziz
Institut de Mécanique et d'Ingénierie [I2M]

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Article de revue

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Journal of Contaminant Hydrology. 2020-12-01p. 103761

Résumé en anglais

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.< Réduire

Mots clés en anglais

Foam

Porous medium

Colloidal particle

Light non aqueous phase liquid

2D tank

URI

https://oskar-bordeaux.fr/handle/20.500.12278/124092

DOI

http://dx.doi.org/10.1016/j.jconhyd.2020.103761

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Use of saponin foam reinforced with colloidal particles as an application to soil remediation: Experiments in a 2D tank

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Use of saponin foam reinforced with colloidal particles as an application to soil remediation: Experiments in a 2D tank

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Unités de recherche