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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
Author
ccMOHAMMADI ALAMOOTI, Amir Hossein
1002421 Institut de Mécanique et d'Ingénierie [I2M]
18404 Bureau de Recherches Géologiques et Minières [BRGM]
243969 Agence de l'Environnement et de la Maîtrise de l'Énergie [ADEME]
COLOMBANO, Stéfan
18404 Bureau de Recherches Géologiques et Minières [BRGM]
OMIRBEKOV, Sagyn
18404 Bureau de Recherches Géologiques et Minières [BRGM]
355543 Nazarbayev University [Kazakhstan]
1002421 Institut de Mécanique et d'Ingénierie [I2M]
ccAHMADI-SENICHAULT, Azita
1002421 Institut de Mécanique et d'Ingénierie [I2M]
LION, Fabien
18404 Bureau de Recherches Géologiques et Minières [BRGM]
DAVARZANI, Hossein
18404 Bureau de Recherches Géologiques et Minières [BRGM]

URI
http://hdl.handle.net/10985/23761
DOI
10.1016/j.jhazmat.2022.129702
Date
2022-10
Journal
Journal of Hazardous Materials

Abstract

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 suspension by adding barite particles to displace DNAPL. To evaluate the efficiency of the densification of polymer suspensions on the displacement of DNAPL, various densities of barite-polymer suspension; lower, equal, and higher than the density of DNAPL were prepared and their rheological behavior was analyzed. Then flow experiments were performed using a decimetric-scale 2D tank. The displacement procedure was monitored with an imaging technique and the production and injection process data were recorded by mass balance interpretation. It was shown that the densification of the polymer suspension could improve the displacement efficiency of DNAPL up to four times. The clogging behavior of barite-polymer suspension was assessed in a 1D column. Generalized Darcy’s law and the continuity equation were used to numerically simulate the experimental two-phase flow. To take into account the clogging behavior of the suspension, the transport equation of diluted species was implemented into the model. The simulation results show that the model can properly predicts the experimental consequences.

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