A composite numerical model for assessing subsurface transport of oily wastes and chemical constituents

Panday, Sorab; Wu, Yu‐Shu; Huyakorn, Peter S.; Wade, Shirley; Saleem, Z. A.

doi:10.1016/s0169-7722(96)00022-8

Cited by 21 publications

(10 citation statements)

References 26 publications

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“…The risk assessment of soils contaminated by non-aqueous phase liquid pollutants (NAPLs) is commonly based on the numerical predictions of macroscopic simulators of the multiphase and multicomponent transport equations in porous media (Panday et al, 1997;Javadi and Al-Najjar, 2007). The accuracy and reliability of such predictions are improved substantially by introducing into the simulators realistic values of the up-scaled transport properties (capillary pressure, relative permeabilities) of the saturated and unsaturated zones of the soil (Oliveira and Demond, 2003;Fagerlund et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

The effect of micro-heterogeneity and capillary number on capillary pressure and relative permeability curves of soils

Aggelopoulos¹,

Tsakiroglou²

2008

Geoderma

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Section: Introductionmentioning

confidence: 99%

The effect of micro-heterogeneity and capillary number on capillary pressure and relative permeability curves of soils

Aggelopoulos¹,

Tsakiroglou²

2008

Geoderma

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“…The main constituents of oil are hydrocarbons which account for 97%-99% are the main constituents, comparing to nonhydrocarbons 1%-2% [3]. There are four types of hydrocarbons in oil: (1) alkanes, which are saturated hydrocarbons and can be separated into straight-chain alkanes and alkane isomers, their general formula is C n H 2n+2 .…”

Section: Composition Of Petroleum Hydrocarbons In Groundwater Symentioning

confidence: 99%

Migration Mechanism of Petroleum Hydrocarbon Pollutants in Groundwater System: A Case Study from Groundwater System in Jinan Refinery

Wang

Wei

et al. 2010

2010 4th International Conference on Bioinformatics and Biomedical Engineering

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The pollution of petroleum hydrocarbon in groundwater system has become a serious environmental problem. In this paper, we take Jinan refinery as an example to discuss the composition and migration mechanism of petroleum hydrocarbon contaminants. Based on filed survey and laboratory experiments, we researched the adsorption and desorption of petroleum hydrocarbons and the migration mechanism of them in the aeration zone. We have found that the migration mechanism of petroleum hydrocarbons in groundwater was related to the content of petroleum hydrocarbon, composition of groundwater, structure of waterbearing petrofabric and the interaction of them. In the research area, the petroleum hydrocarbons migrate mainly in form of floating oil and in direction of northwest.

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“…Three of these models, which are NAPL SIMULATOR, [20] UTCHEM, [21] and EPACMOW [22] were reviewed, in order to verify the underlying assumptions upon which each model was developed, and the suitability for applying it to field-scale problems. A detailed review of these computer codes is presented in Ahmed.…”

Section: Intraparticle Pore Diffusion Modelmentioning

confidence: 99%

Field Scale DNAPLs Transport Under Nonequilibrium Sorption Conditions

Ahmed

Chen

2006

Journal of Environmental Science and Health, Part A

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The purpose of this work is to study the desorption of dense nonaqueous phase liquids (DNAPLs), TCE in particular, from solid particles in field scale heterogeneous aquifers upon their remediation. A computer program, capable of simulating the fate and transport of NAPLs in porous media, has been developed to work under nonequilibrium sorption conditions. The model has been applied to a field scale site at Hill Air Force Base, Utah, which has been contaminated by DNAPLs. The simulated domain was 155 ft (47.25 m) long, 60 ft (18.29 m) wide, and 15.5 ft (4.72 m) thick. This thickness represents only the saturated zone of the aquifer. Changes in permeability, grain size distribution, and sorptive properties throughout the site have been incorporated into the model. Immediately after the aquifer cleanup, the DNAPL concentration in the aqueous phase was assumed to be zero, and this was considered the start-off time for the simulation. Results show that, with an increase in time, the TCE diffused out of the solid particles, forming a plume. The rate of contaminant diffusion was observed to be very fast at the start, followed by a very slow stage, with a number of years required for substantial desorption of the contaminant from the solid particles. There were local variations in contaminant concentration in the fluid phase across the site due to aquifer heterogeneity. A comparison between numerical results and water samples taken from the site after the end of the cleanup operation is also presented.

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A composite numerical model for assessing subsurface transport of oily wastes and chemical constituents

Cited by 21 publications

References 26 publications

The effect of micro-heterogeneity and capillary number on capillary pressure and relative permeability curves of soils

The effect of micro-heterogeneity and capillary number on capillary pressure and relative permeability curves of soils

Migration Mechanism of Petroleum Hydrocarbon Pollutants in Groundwater System: A Case Study from Groundwater System in Jinan Refinery

Field Scale DNAPLs Transport Under Nonequilibrium Sorption Conditions

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