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- W4310136680 endingPage "104120" @default.
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- W4310136680 abstract "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." @default.
- W4310136680 created "2022-11-30" @default.
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- W4310136680 date "2023-01-01" @default.
- W4310136680 modified "2023-10-18" @default.
- W4310136680 title "Experimental study of DNAPL displacement by a new densified polymer solution and upscaling problems of aqueous polymer flow in porous media" @default.
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- W4310136680 doi "https://doi.org/10.1016/j.jconhyd.2022.104120" @default.
- W4310136680 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36495693" @default.
- W4310136680 hasPublicationYear "2023" @default.
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