The effect of soil‐particle size on hydrocarbon entrapment near a dynamic water table

Ryan, Robert G.; Dhir, Vijay K.

doi:10.1080/15320389309383429

Cited by 16 publications

(2 citation statements)

References 14 publications

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“…This phenomenon was also observed from similar experiments by Lenhard et al (1993) and Ryan and Dhir (1993), the comparison of which is summarised in Table 6. All researches used similar sizes of porous media and similar LNAPLs (Soltrol 170 and diesel have relatively similar viscosity and surface tension); however, the amounts of entrapped air obtained from this research are much larger than those of other researches.…”

Section: Degree Of Saturation (%)supporting

confidence: 72%

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Effects of water table fluctuation on diesel fuel migration in one-dimensional laboratory study

Yimsiri

Eua-Apiwatch

Flores

et al. 2016

European Journal of Environmental and Civil Engineering

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The effects of water table fluctuation on diesel fuel redistribution in unsaturated soil are investigated in the laboratory by one-dimensional column test. The simplified image analysis method is used to assess the saturation distributions of water and diesel in the flow domain under transient condition. The experiments are undertaken on two homogeneous sands to study the effects of different particle sizes. The two-phase experimental data illustrate soil-liquid characteristic curves (SLCCs) of water/air and diesel/air systems. The SLCCs of diesel/water systems can be predicted by scaling procedure. A descending order of matric suction at a given saturation of wetting phase is in the order of air/water, diesel/water and air/diesel systems. Coarser particle size gives smaller entry pressure, residual matric suction and residual degree of saturation. The three-phase (air/water/diesel) experimental data illustrate that, during imbibition stages, air and diesel are entrapped below water table with the entrapped air saturations of 18-24% and entrapped diesel saturations of 6-10% for fine sand. Coarser particle size yields smaller entrapped diesel saturations and larger entrapped air saturations. The residual diesel saturations during drainage stages and entrapped diesel saturations during imbibition stages do not show any systematic difference as these stages are repeated. During imbibition stages, 37-47% of the total amount of diesel fuel is entrapped under the water table. Also, there is no systematic difference in the amount of diesel fuel entrapped under the water table when imbibition stages are repeated.

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Section: Degree Of Saturation (%)supporting

confidence: 72%

“…Arya & Paris, 1981;Yang, Rahardjo, Leong, & Fredlund, 2004), on residual saturation (e.g. Ryan & Dhir, 1993), and on permeability (e.g. Arya, Leij, Shouse, & van Genuchten, 1999;Chapuis, 2004); however, most studies have been done with soil element tests.…”

Section: Introductionmentioning

confidence: 99%