Experimental and numerical validation of the total trapping number for prediction of DNAPL mobilization

Yusong Li, Linda M. Abriola, Thomas J. Phelan, C. Andrew Ramsburg, Kurt D. Pennell

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The total trapping number (NT), quantifying the balance of gravitational, viscous, and capillary forces acting on an entrapped dense nonaqueous phase liquid (DNAPL) droplet, was originally developed as a criterion to predict the onset and extent of residual DNAPL mobilization in porous media. The ability of this approach to predict mobilization behavior, however, has not been rigorously validated in multidimensional systems. In this work, experimental observations of residual tetrachloroethene (PCE) mobilization in rectangular columns are compared to predictions obtained using a multiphase compositional finite-element simulator that was modified to incorporate the dependence of entrapped residual, flow, and transport parameters on the total trapping number. Consistent with calculated NT values (1.21 × 10 -3-1.10 × 10-2), residual PCE-DNAPL was mobilized immediately upon contact with a low-interfacial tension (IFT) surfactant solution and rapidly migrated downward to form a bank of mobile DNAPL. The numerical model accurately captured the onset and extent of PCE-DNAPL mobilization, the angle and migration of the DNAPL bank, the swept path of the surfactant solution, and cumulative PCE recovery. These findings demonstrate the utility of the total trapping number for prediction of DNAPL mobilization behavior during low-IFT flushing.

Original languageEnglish (US)
Pages (from-to)8135-8141
Number of pages7
JournalEnvironmental Science and Technology
Volume41
Issue number23
DOIs
StatePublished - Dec 1 2007

Fingerprint

nonaqueous phase liquid
mobilization
trapping
Liquids
prediction
Surface-Active Agents
surfactant
Surface tension
Tetrachloroethylene
residual flow
tetrachloroethylene
flushing
Contacts (fluid mechanics)
droplet
simulator
Porous materials
porous medium
Numerical models
Simulators
Recovery

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Experimental and numerical validation of the total trapping number for prediction of DNAPL mobilization. / Li, Yusong; Abriola, Linda M.; Phelan, Thomas J.; Ramsburg, C. Andrew; Pennell, Kurt D.

In: Environmental Science and Technology, Vol. 41, No. 23, 01.12.2007, p. 8135-8141.

Research output: Contribution to journalArticle

Li, Yusong ; Abriola, Linda M. ; Phelan, Thomas J. ; Ramsburg, C. Andrew ; Pennell, Kurt D. / Experimental and numerical validation of the total trapping number for prediction of DNAPL mobilization. In: Environmental Science and Technology. 2007 ; Vol. 41, No. 23. pp. 8135-8141.
@article{afa8703d3a5d4620b14a49c9965fb10c,
title = "Experimental and numerical validation of the total trapping number for prediction of DNAPL mobilization",
abstract = "The total trapping number (NT), quantifying the balance of gravitational, viscous, and capillary forces acting on an entrapped dense nonaqueous phase liquid (DNAPL) droplet, was originally developed as a criterion to predict the onset and extent of residual DNAPL mobilization in porous media. The ability of this approach to predict mobilization behavior, however, has not been rigorously validated in multidimensional systems. In this work, experimental observations of residual tetrachloroethene (PCE) mobilization in rectangular columns are compared to predictions obtained using a multiphase compositional finite-element simulator that was modified to incorporate the dependence of entrapped residual, flow, and transport parameters on the total trapping number. Consistent with calculated NT values (1.21 × 10 -3-1.10 × 10-2), residual PCE-DNAPL was mobilized immediately upon contact with a low-interfacial tension (IFT) surfactant solution and rapidly migrated downward to form a bank of mobile DNAPL. The numerical model accurately captured the onset and extent of PCE-DNAPL mobilization, the angle and migration of the DNAPL bank, the swept path of the surfactant solution, and cumulative PCE recovery. These findings demonstrate the utility of the total trapping number for prediction of DNAPL mobilization behavior during low-IFT flushing.",
author = "Yusong Li and Abriola, {Linda M.} and Phelan, {Thomas J.} and Ramsburg, {C. Andrew} and Pennell, {Kurt D.}",
year = "2007",
month = "12",
day = "1",
doi = "10.1021/es070834i",
language = "English (US)",
volume = "41",
pages = "8135--8141",
journal = "Environmental Science & Technology",
issn = "0013-936X",
publisher = "American Chemical Society",
number = "23",

}

TY - JOUR

T1 - Experimental and numerical validation of the total trapping number for prediction of DNAPL mobilization

AU - Li, Yusong

AU - Abriola, Linda M.

AU - Phelan, Thomas J.

AU - Ramsburg, C. Andrew

AU - Pennell, Kurt D.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - The total trapping number (NT), quantifying the balance of gravitational, viscous, and capillary forces acting on an entrapped dense nonaqueous phase liquid (DNAPL) droplet, was originally developed as a criterion to predict the onset and extent of residual DNAPL mobilization in porous media. The ability of this approach to predict mobilization behavior, however, has not been rigorously validated in multidimensional systems. In this work, experimental observations of residual tetrachloroethene (PCE) mobilization in rectangular columns are compared to predictions obtained using a multiphase compositional finite-element simulator that was modified to incorporate the dependence of entrapped residual, flow, and transport parameters on the total trapping number. Consistent with calculated NT values (1.21 × 10 -3-1.10 × 10-2), residual PCE-DNAPL was mobilized immediately upon contact with a low-interfacial tension (IFT) surfactant solution and rapidly migrated downward to form a bank of mobile DNAPL. The numerical model accurately captured the onset and extent of PCE-DNAPL mobilization, the angle and migration of the DNAPL bank, the swept path of the surfactant solution, and cumulative PCE recovery. These findings demonstrate the utility of the total trapping number for prediction of DNAPL mobilization behavior during low-IFT flushing.

AB - The total trapping number (NT), quantifying the balance of gravitational, viscous, and capillary forces acting on an entrapped dense nonaqueous phase liquid (DNAPL) droplet, was originally developed as a criterion to predict the onset and extent of residual DNAPL mobilization in porous media. The ability of this approach to predict mobilization behavior, however, has not been rigorously validated in multidimensional systems. In this work, experimental observations of residual tetrachloroethene (PCE) mobilization in rectangular columns are compared to predictions obtained using a multiphase compositional finite-element simulator that was modified to incorporate the dependence of entrapped residual, flow, and transport parameters on the total trapping number. Consistent with calculated NT values (1.21 × 10 -3-1.10 × 10-2), residual PCE-DNAPL was mobilized immediately upon contact with a low-interfacial tension (IFT) surfactant solution and rapidly migrated downward to form a bank of mobile DNAPL. The numerical model accurately captured the onset and extent of PCE-DNAPL mobilization, the angle and migration of the DNAPL bank, the swept path of the surfactant solution, and cumulative PCE recovery. These findings demonstrate the utility of the total trapping number for prediction of DNAPL mobilization behavior during low-IFT flushing.

UR - http://www.scopus.com/inward/record.url?scp=36849073705&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36849073705&partnerID=8YFLogxK

U2 - 10.1021/es070834i

DO - 10.1021/es070834i

M3 - Article

VL - 41

SP - 8135

EP - 8141

JO - Environmental Science & Technology

JF - Environmental Science & Technology

SN - 0013-936X

IS - 23

ER -