Visualization of TCE recovery mechanisms using surfactant-polymer solutions in a two-dimensional heterogeneous sand model

Journal of Contaminant Hydrology
Thomas RobertUta Gabriel

Abstract

This research focused on the optimization of TCE dissolution in a physical two-dimensional model providing a realistic representation of a heterogeneous granular aquifer. TCE was infiltrated in the sand pack where it resided both in pools and in zones of residual saturation. Surfactant was initially injected at low concentration to minimize TCE remobilization at first contact but was incrementally increased later during the experiment. Xanthan gum was added to the injected surfactant solution to optimize the sweep efficiency through the heterogeneous medium. Photographs and digital image analysis illustrated the interactions between TCE and the injected fluids. During the polymer flood, the effects of heterogeneities inside the sand pack were greatly reduced by the increased fluid viscosity and the shear-thinning effects of the polymer. The polymer also improved the contact between the TCE ganglia and the surfactant-polymer solution, thereby promoting dissolution. Surfactants interacted with the polymer reducing the overall viscosity of the solution. At first contact with a 0.5%(mass) surfactant solution, the TCE pools drained and some remobilization occurred. However, no TCE bank was formed and TCE did not penetrate into any p...Continue Reading

References

May 12, 2001·Environmental Science & Technology·G HarroldS A Leharne
Feb 6, 2002·Environmental Science & Technology·Varadarajan DwarakanathGary A Pope
May 18, 2004·Journal of Contaminant Hydrology·Chantal St-PierreJalal Hawari

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Citations

Feb 5, 2014·Journal of Hazardous Materials·Chanat ChokejaroenratBruce Dvorak
Sep 6, 2014·Journal of Contaminant Hydrology·Scott C Hauswirth, Cass T Miller
Jul 10, 2012·Journal of Contaminant Hydrology·Jeff A K SilvaJohn E McCray
May 20, 2011·Journal of Hazardous Materials·Lirong ZhongXiqing Li
Oct 19, 2010·Journal of Hazardous Materials·Silvia CombaRajandrea Sethi
Nov 8, 2008·Journal of Contaminant Hydrology·Letícia A BernardezRichard Martel
Mar 11, 2017·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Dayoung AhnHeonki Kim
Mar 28, 2017·Journal of Contaminant Hydrology·Jeff A K SilvaSean Davenport
Jul 21, 2017·Environmental Science and Pollution Research International·Yunsong LiuYandan Shi
Jan 1, 2020·Ground Water Monitoring & Remediation·Michael C BrooksJunqi Huang
Jan 12, 2008·Environmental Science & Technology·Yusong LiKurt D Pennell

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