Remediation of DNAPL Pools Using Dense Brine Barrier Strategies

Hill, Edward H.; Moutier, Marylène; Barbosa, Juan Manuel Alfaro; Miller, Cass T.

doi:10.1021/es001891d

Cited by 30 publications

(28 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modeling of non-dilute systems in porous medium systems has received considerable attention in the literature both because of intrinsic interest [e.g., 9, 12, 13, 19–21] and also because of the many important applications that fall into this category of model [e.g., 10, 11, 17]. A rich, recent experimental literature has contributed as well to helping better understand the physicochemical phenomena of interest in these complex systems.…”

Section: Discussionmentioning

confidence: 99%

Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 5. Single-fluid-phase transport

Gray

Miller

2009

Advances in Water Resources

View full text Add to dashboard Cite

This work is the fifth in a series of papers on the thermodynamically constrained averaging theory (TCAT) approach for modeling flow and transport phenomena in multiscale porous medium systems. The general TCAT framework and the mathematical foundation presented in previous works are used to develop models that describe species transport and single-fluid-phase flow through a porous medium system in varying physical regimes. Classical irreversible thermodynamics formulations for species in fluids, solids, and interfaces are developed. Two different approaches are presented, one that makes use of a momentum equation for each entity along with constitutive relations for species diffusion and dispersion, and a second approach that makes use of a momentum equation for each species in an entity. The alternative models are developed by relying upon different approaches to constrain an entropy inequality using mass, momentum, and energy conservation equations. The resultant constrained entropy inequality is simplified and used to guide the development of closed models. Specific instances of dilute and non-dilute systems are examined and compared to alternative formulation approaches.

show abstract

Section: Discussionmentioning

confidence: 99%

Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 5. Single-fluid-phase transport

Gray

Miller

2009

Advances in Water Resources

View full text Add to dashboard Cite

show abstract

“…Laboratory experiments to investigate a range of BBRT’s have been performed in one-, two-, and three-dimensional porous medium systems, and heterogeneous systems have been the focus of these experiments (Hill et al, 2001; Johnson et al, 2004; Miller et al, 2000). Encouraging results have been reported based upon these experiments, including the efficient removal of high fractions of DNAPL from heterogeneous, three-dimensional systems (Hill et al, 2001; Johnson et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Encouraging results have been reported based upon these experiments, including the efficient removal of high fractions of DNAPL from heterogeneous, three-dimensional systems (Hill et al, 2001; Johnson et al, 2004). …”

Section: Introductionmentioning

confidence: 99%

“…While such systems are of significant recent interest due to applications that include waste disposal (Nordbotten et al, 2004; Rumynin et al, 2005), DNAPL remediation (Hill et al, 2001; Johnson et al, 2004; Miller et al, 2000), and saltwater intrusion (Abarca et al, 2007; Brovelli et al, 2007; Goswami and Clement, 2007; Held et al, 2005; Zhang et al, 2001), our understanding of such systems is not complete. In the sections that follow, we briefly summarize the state of knowledge regarding equations of state, density effects, viscous effects, porous medium property effects, model formulation, and simulators.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dense, viscous brine behavior in heterogeneous porous medium systems

Wright

Pedit

Gasda

et al. 2010

Journal of Contaminant Hydrology

View full text Add to dashboard Cite

The behavior of dense, viscous calcium bromide brine solutions used to remediate systems contaminated with dense nonaqueous phase liquids (DNAPLs) is considered in laboratory and field porous medium systems. The density and viscosity of brine solutions are experimentally investigated and functional forms fit over a wide range of mass fractions. A density of 1.7 times, and a corresponding viscosity of 6.3 times, that of water is obtained at a calcium bromide mass fraction of 0.53. A three-dimensional laboratory cell is used to investigate the establishment, persistence, and rate of removal of a stratified dense brine layer in a controlled system. Results from a field-scale experiment performed at the Dover National Test Site are used to investigate the ability to establish and maintain a dense brine layer as a component of a DNAPL recovery strategy, and to recover the brine at sufficiently high mass fractions to support the economical reuse of the brine. The results of both laboratory and field experiments show that a dense brine layer can be established, maintained, and recovered to a significant extent. Regions of unstable density profiles are shown to develop and persist in the field-scale experiment, which we attribute to regions of low hydraulic conductivity. The saturated-unsaturated, variable-density ground-water flow simulation code SUTRA is modified to describe the system of interest, and used to compare simulations to experimental observations and to investigate certain unobserved aspects of these complex systems. The model results show that the standard model formulation is not appropriate for capturing the behavior of sharp density gradients observed during the dense brine experiments.

show abstract

“…For example, Miller and workers have recently suggested a novel class of remediation methods based upon the injection of a dense brine, which is used to restrict the movement of dense non-aqueous phase liquids and aid remediation [1][2][3]. For such systems, the behavior of the brine as a function of space and time is a critical issue.…”

Section: Introductionmentioning

confidence: 99%

On gravity currents in heterogeneous porous media

Anderson

McLaughlin

Miller

2004

Computational Methods in Water Resources: Volume 1

View full text Add to dashboard Cite

We examine the case of density-dependent flow in heterogeneous porous medium systems bounded by a free surface using homogenization methods for leading-order approximations. Specifically we consider the two-dimensional case in which variations occur in both the horizontal and vertical directions. Such problems lead to the need to solve cell problems to compute the solution, which is generally done using numerical approaches. We review the general homogenization results for general topology and aspect ratio. We derive an analytical solution for a case with two-dimensional variability in the slender limit for certain assumed scaling of the permeability, and we find excellent agreement with the numerical solution. We also consider the case of two miscible fluids with an assumed sharp interface and contrasting densities. We derive an analytical solution in a thin limit neglecting mixing and show agreement with known solutions for limiting cases.

show abstract

Remediation of DNAPL Pools Using Dense Brine Barrier Strategies

Cited by 30 publications

References 29 publications

Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 5. Single-fluid-phase transport

Thermodynamically constrained averaging theory approach for modeling flow and transport phenomena in porous medium systems: 5. Single-fluid-phase transport

Dense, viscous brine behavior in heterogeneous porous medium systems

On gravity currents in heterogeneous porous media

Contact Info

Product

Resources

About