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Enhancing remediation of residual DNAPL in multilayer aquifers: Post-injection of alcohol-surfactant-polymer mixtures

Article dans une revue avec comité de lecture
Auteur
ccALAMOOTI, Amir
18404 Bureau de Recherches Géologiques et Minières [BRGM]
243969 Agence de l'Environnement et de la Maîtrise de l'Énergie [ADEME]
1002421 Institut de Mécanique et d'Ingénierie [I2M]
COLOMBANO, Stéfan
18404 Bureau de Recherches Géologiques et Minières [BRGM]
SHOKER, Abbas
18404 Bureau de Recherches Géologiques et Minières [BRGM]
ccAHMADI-SENICHAULT, Azita
1002421 Institut de Mécanique et d'Ingénierie [I2M]
LION, Fabien
18404 Bureau de Recherches Géologiques et Minières [BRGM]
CAZAUX, David
302928 Solvay (France)
MARION, Cédric
24487 Institut de Chimie et Biochimie Moléculaires et Supramoléculaires [ICBMS]
LAGRON, Jérôme
24487 Institut de Chimie et Biochimie Moléculaires et Supramoléculaires [ICBMS]
SAWADOGO, Idriss
18404 Bureau de Recherches Géologiques et Minières [BRGM]
DAVARZANI, Dorian
18404 Bureau de Recherches Géologiques et Minières [BRGM]

URI
http://hdl.handle.net/10985/24811
DOI
10.1016/j.scitotenv.2024.170680
Date
2024-03
Journal
Science of The Total Environment

Résumé

Although polymer-surfactant injection is an effective remediation technology for multilayer aquifers contaminated by Dense Non-Aqueous Phase Liquids (DNAPL), the existence of residual DNAPL after treatment is inevitable. This study evaluates the efficiency of the post-injection of alcohol-surfactant-polymer (ASP) mixtures containing 1-propanol/1-hexanol, sodium dodecylbenzenesulfonate (SDBS), and xanthan in enhancing remediation of residual DNAPL in layered systems. A range of experimental devices, including batch, rheological measurements, centimetric 1D column, and decametric 2D tank experiments, were employed. Batch experiments revealed that the inclusion of 1-hexanol swelled the DNAPL volume due to alcohol partitioning. Conversely, with only 1-propanol present in the alcohol-surfactant (AS) mixture, DNAPL dissolved in the aqueous phase. The co-presence of 1-hexanol along with 1-propanol in AS mixture favored 1-propanol's partitioning into the DNAPL phase. Column experiments, following primary xanthan-SDBS (XS) injections, demonstrated that ASP mixtures with 1-hexanol (regardless of presence of 1-propanol) underwent a mobilization mechanism. DNAPL appeared in the effluent as an organic phase after the post-injection of 0.3 pore-volumes (PV), by a reduction trend in its density. In contrast, mixtures with solely 1-propanol exhibited a solubilization mechanism, with DNAPL dissolving in the aqueous phase and emerging in the effluent after approximately 1 PV. 2D tank experiments visualized mobilization and solubilization mechanisms in multilayered systems. Post-injection of the ASP mixture with solely 1-propanol led to DNAPL solubilization, demonstrated by a dark zone of varied DNAPL concentrations, followed by a clearer white zone indicating significant DNAPL dissolution. Injecting ASP mixture containing both 1-propanol and 1-hexanol mobilized swollen DNAPL ganglia throughout layers, with these droplets coalescing and migrating to the recovery point. The darkness of mobilized droplets was faded as more DNAPL was recovered. The solubilization ASP mixture enhanced the recovery factor by 0.02 while the mobilization ASP mixture led to a 0.08 increase in the recovery factor.

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  • Gravity-driven remediation of DNAPL polluted aquifers using densified biopolymer brine solution 
    Article dans une revue avec comité de lecture
    ccALAMOOTI, Amir; ccCOLOMBANO, Stéfan; ccDAVARZANI, Dorian; ccLION, Fabien; ccAHMADI-SENICHAULT, Azita (Elsevier BV, 2024-03)
    Polymer solutions aid DNAPL (Dense Non Aqueous Phase Liquid)-contaminated soil remediation but are impacted by gravity and viscous forces. This study assesses the interplay between buoyancy and viscous forces in influencing ...
  • Remediation of multilayer soils contaminated by heavy chlorinated solvents using biopolymer-surfactant mixtures: Two-dimensional flow experiments and simulations 
    Article dans une revue avec comité de lecture
    ccALAMOOTI, Amir; COLOMBANO, Stéfan; GLABE, Zakari Abdullaziz; LION, Fabien; DAVARZANI, Dorian; ccAHMADI-SENICHAULT, Azita (Elsevier BV, 2023-09)
    To assess the efficiency of remediating dense non-aqueous phase liquids (DNAPLs), here heavy chlorinated solvents, through injection of xanthan solutions with or without surfactant (sodium dodecylbenzenesulfonate: SDBS), ...
  • Influence of the injection of densified polymer suspension on the efficiency of DNAPL displacement in contaminated saturated soils 
    Article dans une revue avec comité de lecture
    ccMOHAMMADI ALAMOOTI, Amir Hossein; COLOMBANO, Stéfan; OMIRBEKOV, Sagyn; ccAHMADI-SENICHAULT, Azita; LION, Fabien; DAVARZANI, Hossein (Elsevier BV, 2022-10)
    Nowadays the remediation of DNAPL contaminated zones near groundwater has gained great prominence in environmental fields due to the high importance of water resources. In this work, we suggest injecting a densified polymer ...
  • Remediation of multilayer soils contaminated by heavy chlorinated solvents using biopolymer-surfactant mixtures: Two-dimensional flow experiments and simulations 
    Article dans une revue avec comité de lecture
    ccAMIR, ALAMOOTI; ccCOLOMBANO, Stéfan; ccZAKARI, Abdullaziz; ccLION, Fabien; ccDAVARZANI, Dorian; ccAHMADI, Azita (Elsevier BV, 2023-09)
    To assess the efficiency of remediating dense non-aqueous phase liquids (DNAPLs), here heavy chlorinated solvents, through injection of xanthan solutions with or without surfactant (sodium dodecylbenzenesulfonate: SDBS), ...
  • Experimental study of DNAPL displacement by a new densified polymer solution and upscaling problems of aqueous polymer flow in porous media 
    Article dans une revue avec comité de lecture
    ccOMIRBEKOV, Sagyn; COLOMBANO, Stéfan; ccAMIR, ALAMOOTI; BATIKH, Ali; ccAMANBEK, Yerlan; ccAZITA, AHMADI; DAVARZANI, Hossein; COCHENNEC, Maxime (Elsevier BV, 2023-01)
    Nowadays the remediation of DNAPL contaminated zones near groundwater has gained great prominence in environmental fields due to the high importance of water resources. In this work, we suggest injecting a densified polymer ...

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