The impact of methanogenesis on flow and transport in coarse sand

Ye, Shujun; Sleep, Brent E.; Chien, Calvin C.

doi:10.1016/j.jconhyd.2008.09.004

Cited by 42 publications

(19 citation statements)

References 22 publications

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“…A light transmission (LT) system [35] was applied to quantify PCE saturation (S n ) distribution within the porous media. A thermoelectrically air-cooled charged-coupled device (CCD) camera (AP2E, Apogee Instruments, Auburn, CA) together with a 543 nm, 10 nm band pass filter and associated software (Maxim DL, Ottawa, ON) were used to collect and analyze images.…”

Section: Methodsmentioning

confidence: 99%

Removal of tetrachloroethylene from homogeneous and heterogeneous porous media: Combined effects of surfactant solubilization and oxidant degradation

Zheng

Gao

Sun

et al. 2016

Chemical Engineering Journal

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Section: Methodsmentioning

confidence: 99%

Removal of tetrachloroethylene from homogeneous and heterogeneous porous media: Combined effects of surfactant solubilization and oxidant degradation

Zheng

Gao

Sun

et al. 2016

Chemical Engineering Journal

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“…A light transmission system (Ye et al 2009) was applied to record migration behavior and quantify PCE saturation (S n ) distribution within porous media. This system includes a 2-D sandbox, light bank and thermoelectrically air-cooled charged-coupled device (CCD) camera (AP2E, Apogee Instruments, Auburn, California, USA).…”

Section: Image Analysismentioning

confidence: 99%

Influence of flow velocity and spatial heterogeneity on DNAPL migration in porous media: insights from laboratory experiments and numerical modelling

et al. 2015

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Understanding the migration of dense non-aqueous phase liquids (DNAPLs) in complex subsurface systems is important for evaluating contamination source zones and designing remediation schemes after spill events. Six sandbox experiments were performed to explore the individual effect of flow velocity, and the combined effect of flow velocity and layered lenses on a DNAPL (PCE) migration in porous media. DNAPL saturation was measured using a light transmission system, and saturation distribution was quantified by spatial moments. The experimental results show that large flow velocity significantly promotes lateral and vertical migration of the low-viscosity DNAPL, while when layered lenses exist, the infiltration rate decreases and horizontal spread increases. Migration processes were numerically simulated, and the modelling results tested against experimental results. Furthermore, migration of DNAPLs with different viscosities was simulated to explore the combined effects of flow velocity and geological heterogeneity. Simulation results show that enhanced heterogeneity makes low-viscosity DNAPLs migrate along preferential pathways, resulting in irregular DNAPL morphology. Layered lenses combined with heterogeneity complicate the effect of flow velocity on the migration of low-viscosity DNAPLs by changing percolation paths. Results also demonstrate that flow velocity exhibits relatively little influence on the migration of medium/high-viscosity DNAPLs, which is predominantly controlled by viscosity and heterogeneity. Enhanced heterogeneity has a larger effect on migration behavior. Findings indicate that the migration paths and position of the source zone could change significantly, due to the combined effect of groundwater flow velocity and geological heterogeneity; thus, comprehensive hydrogeological investigation is needed to characterize the source zone.

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“…As water continues to move into that zone and outgas bubbles, the bubbles will move upward. In general terms, it has been observed that the upwardly mobilized pathways will be relatively widely spaced and have a relatively minor impact on bulk groundwater flow (Ye et al, 2009). This is unlike the case within a heated zone discussed above where exsolution of bubbles can significantly reduce flow.…”

Section: Numerical Modeling Of Bubble Movementmentioning

confidence: 92%

In Situ Thermal Remediation of DNAPL Source Zones

Johnson¹,

Tratnyek²,

Sleep³

et al. 2011

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The impact of methanogenesis on flow and transport in coarse sand

Cited by 42 publications

References 22 publications

Removal of tetrachloroethylene from homogeneous and heterogeneous porous media: Combined effects of surfactant solubilization and oxidant degradation

Removal of tetrachloroethylene from homogeneous and heterogeneous porous media: Combined effects of surfactant solubilization and oxidant degradation

Influence of flow velocity and spatial heterogeneity on DNAPL migration in porous media: insights from laboratory experiments and numerical modelling

In Situ Thermal Remediation of DNAPL Source Zones

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