TY - JOUR
T1 - Experimental study of DNAPL displacement by a new densified polymer solution and upscaling problems of aqueous polymer flow in porous media
AU - Omirbekov, Sagyn
AU - Colombano, Stéfan
AU - Alamooti, Amir
AU - Batikh, Ali
AU - Amanbek, Yerlan
AU - Ahmadi-Senichault, Azita
AU - Davarzani, Hossein
AU - Cochennec, Maxime
N1 - Funding Information:
This work was carried out within the framework of the PAPIRUS project. The authors would like to thank BRGM (French Geological Survey) and ADEME (French Environment and Energy Management Agency) for co-funding the project under the “GESIPOL” program. The authors also acknowledge the financial support provided to the PIVOTS project by the “Région Centre – Val de Loire” and the European Regional Development Fund. We thank INOVYN for the assistance provided during the PAPIRUS project, particularly for providing access to the Tavaux site. We are also grateful for research grant No. AP19679429 from the Ministry of Science and Higher Education of the Republic of Kazakhstan.
Funding Information:
This work was carried out within the framework of the PAPIRUS project. The authors would like to thank BRGM (French Geological Survey) and ADEME (French Environment and Energy Management Agency) for co-funding the project under the “ GESIPOL ” program. The authors also acknowledge the financial support provided to the PIVOTS project by the “ Région Centre – Val de Loire ” and the European Regional Development Fund . We thank INOVYN for the assistance provided during the PAPIRUS project, particularly for providing access to the Tavaux site. We are also grateful for research grant No. AP19679429 from the Ministry of Science and Higher Education of the Republic of Kazakhstan.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1
Y1 - 2023/1
N2 - The remediation of DNAPL-contaminated soil with lower-density fluids is ineffective due to the over-riding of displacing fluid. The densification of biopolymers is experimentally studied to develop a solution with the same density as a pollutant. Polymer solutions and contaminants are characterized through rheometer. A 1D column filled with monodisperse glass beads was used to measure their apparent viscosity in porous media. The displacement of pollutants by biopolymers (such as xanthan gum, guar gum, and carboxymethyl cellulose) and densified solutions based on barite are investigated in the 1D porous column. In addition, the polymer solution flow is studied using an upscaling method based on the shear viscosity measured with rheometer. The upscaling results are compared with the 1D column experimental outcomes. We found that carboxymethyl cellulose is the best for densifying polymer and showed the highest remediation yield for DNAPL remediation. The polymers' rheology was represented well through the Carreau rheological model. The discrepancy of apparent viscosity in porous media from polymers' shear viscosity measured with rheometer is explained by the adsorption of polymers on pore surfaces and deposition of barite particles in a porous medium, which led to a decrease in permeability. The upscaling results are in good agreement with experimental outcomes at low-pressure gradients. The impact of porous media geometry on polymer flow in porous media is described.
AB - The remediation of DNAPL-contaminated soil with lower-density fluids is ineffective due to the over-riding of displacing fluid. The densification of biopolymers is experimentally studied to develop a solution with the same density as a pollutant. Polymer solutions and contaminants are characterized through rheometer. A 1D column filled with monodisperse glass beads was used to measure their apparent viscosity in porous media. The displacement of pollutants by biopolymers (such as xanthan gum, guar gum, and carboxymethyl cellulose) and densified solutions based on barite are investigated in the 1D porous column. In addition, the polymer solution flow is studied using an upscaling method based on the shear viscosity measured with rheometer. The upscaling results are compared with the 1D column experimental outcomes. We found that carboxymethyl cellulose is the best for densifying polymer and showed the highest remediation yield for DNAPL remediation. The polymers' rheology was represented well through the Carreau rheological model. The discrepancy of apparent viscosity in porous media from polymers' shear viscosity measured with rheometer is explained by the adsorption of polymers on pore surfaces and deposition of barite particles in a porous medium, which led to a decrease in permeability. The upscaling results are in good agreement with experimental outcomes at low-pressure gradients. The impact of porous media geometry on polymer flow in porous media is described.
KW - Barite
KW - Densification
KW - Polymer
KW - Porous media
KW - Soil remediation
KW - Upscaling
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U2 - 10.1016/j.jconhyd.2022.104120
DO - 10.1016/j.jconhyd.2022.104120
M3 - Article
C2 - 36495693
AN - SCOPUS:85145559133
SN - 0169-7722
VL - 252
JO - Journal of Contaminant Hydrology
JF - Journal of Contaminant Hydrology
M1 - 104120
ER -