1. Saponin foam for soil remediation: On the use of polymer or solid particles to enhance foam resistance against oil
- Author
-
Olivier Atteia, Henri Bertin, Natacha Forey, Abdelaziz Omari, Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Ecole National Supérieur Environnement, Géoresources, Ingénierie du Développement Durable (ENSEGID), Université de Bordeaux, IPB ENSCBP, CNRS UMR 5295, Institut I2M, Pessac, France, Transferts, écoulements, fluides, énergétique (TREFLE), Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), and Université de Bordeaux (UB)
- Subjects
Materials science ,Polymers ,0207 environmental engineering ,Porous media ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Viscosity ,Soil ,Surface-Active Agents ,[SPI]Engineering Sciences [physics] ,xSoil remediation ,Environmental Chemistry ,cardiovascular diseases ,020701 environmental engineering ,ComputingMilieux_MISCELLANEOUS ,Environmental Restoration and Remediation ,0105 earth and related environmental sciences ,Water Science and Technology ,chemistry.chemical_classification ,Pollutant ,Solid particle ,Colloidal particle ,Polymer ,Saponins ,Soil remediation ,Foam ,6. Clean water ,Light non-aqueous phase liquid ,chemistry ,Chemical engineering ,13. Climate action ,lipids (amino acids, peptides, and proteins) ,Porous medium ,Xanthan - Abstract
International audience; Foams can be used to remediate aquifer pollution due to industrial leaks. However, when in contact with oily pollutants, foams may collapse and thus have a very limited life-time. A suitable formulation of biodegradable foam that resists oil contact is therefore needed. Hence, the ability of xanthan polymer and silica colloidal particles to stabilise foam against oil was investigated. Their performance in terms of stabilisation was evaluated via foam generation experiments in columns of porous medium, conducted with and without oil. The results show that the addition of xanthan polymer led to an increase in the viscosity of the solution, which thwarted the formation of foam. It did not improve the resistance of foam to oil, but increased altogether the resistance factor up to more than twice the original value. Concerning silica particles, it was demonstrated that they both noticeably increased resistance factor and moderately stabilised foam against oil by 20% at optimum concentration. As such, this study presents a new way to reinforce foam against oil for soil remediation issues.
- Published
- 2020
- Full Text
- View/download PDF