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Numerical study on kinetic/equilibrium behaviour of dissolution of toluene under variable subsurface conditions
Published in Taylor and Francis Ltd.
2014
Volume: 18
   
Issue: 9
Pages: 1070 - 1093
Abstract
Estimating the extent of kinetic/equilibrium behaviour of dissolution is essential for selecting remediation strategy for highly soluble aromatic constituents of petroleum present in the subsurface. Present study aims at numerically simulating dissolution and transport of toluene under the effect of sorption and biodegradation to understand their synergistic influence during the tailing phase. Subsurface conditions influencing mass transfer such as porous media properties, flow velocity and volumetric residual saturation of toluene entrapped in the pore space are varied and their impacts are assessed. The numerical results in terms of dimensionless numbers suggest that influence of soil grain size and porosity are most significant in calculating the extent of mass transfer limitation. Increases in the volumetric residual saturation results in prolonged near-equilibrium condition for dissolution especially for fine-grained porous media. Tailing is found to be prolonged for sand with low saturations and high flow velocities indicating the importance of mass transfer limitation for the estimation of total clean-up time. © 2014 Taylor and Francis.
About the journal
JournalData powered by TypesetEuropean Journal of Environmental and Civil Engineering
PublisherData powered by TypesetTaylor and Francis Ltd.
Open AccessNo
Concepts (16)
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    Biodegradation
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    Computer simulation
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    Flow velocity
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    MASS TRANSFER
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    Numerical models
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    Porous materials
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    Toluene
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    Dimensionless number
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    HIGH FLOW VELOCITY
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    MASS TRANSFER LIMITATION
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    MEDIA PROPERTIES
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    Numerical results
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    REMEDIATION STRATEGIES
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    RESIDUAL SATURATION
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    SUBSURFACE CONDITIONS
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    Dissolution