Experimental assessment and modeling of interphase mass transfer rates of organic compounds in multiphase subsurface systems. Final report, July 1, 1989--June 30, 1993

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Results of an experimental investigation into strady state dissolution of nonaqueous phase liquids (NAPLS) entrapped within water saturated porous media are presented. Influence of porous media type, NAPL characteristics, and aqueous phase flow velocity are examined for transient and steady-state dissolution of NAPL. Entrapped NAPL distributions are examined and are found to influence mass transfer between the phases. A phenomenological model for the steady state mass transfer process is developed which expresses a lumped mass transfer coefficient as a function of the hydrodynamics of the system and grain size parameters as a surrogate measure of the NAPL distribution. Transient dissolution … continued below

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65 p.

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Abriola, L. M. & Weber, W. J. Jr. October 1, 1993.

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  • University of Michigan
    Publisher Info: Michigan Univ., Ann Arbor, MI (United States)
    Place of Publication: Ann Arbor, Michigan

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Results of an experimental investigation into strady state dissolution of nonaqueous phase liquids (NAPLS) entrapped within water saturated porous media are presented. Influence of porous media type, NAPL characteristics, and aqueous phase flow velocity are examined for transient and steady-state dissolution of NAPL. Entrapped NAPL distributions are examined and are found to influence mass transfer between the phases. A phenomenological model for the steady state mass transfer process is developed which expresses a lumped mass transfer coefficient as a function of the hydrodynamics of the system and grain size parameters as a surrogate measure of the NAPL distribution. Transient dissolution data is used to develop two alternative phenomenological models for mass transfer. The models are incorporated into a onedimensional numerical simulator and are shown to be effective predictors of transient dissolution data in similar experimental systems. In order to further explore the effects of scale and heterogeneities on NAPL dissolution, the sphere model is incorporated into a two-dimensional simulator and is used to explore long-term dissolution of a TCE (trichloroethylene) spill in a layered system of sands. The simulation demonstrates the significance of heterogeneity, both in controlling the initial distribution of NAPL and the rate of NAPL dissolution.

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65 p.

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OSTI as DE94003983; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Other Information: PBD: Oct 1993

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  • October 1, 1993

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Thumbnail image of item number 1 in: 'Experimental assessment and modeling of interphase mass transfer rates of organic compounds in multiphase subsurface systems. Final report, July 1, 1989--June 30, 1993'.
Thumbnail image of item number 2 in: 'Experimental assessment and modeling of interphase mass transfer rates of organic compounds in multiphase subsurface systems. Final report, July 1, 1989--June 30, 1993'.
Thumbnail image of item number 3 in: 'Experimental assessment and modeling of interphase mass transfer rates of organic compounds in multiphase subsurface systems. Final report, July 1, 1989--June 30, 1993'.
Thumbnail image of item number 4 in: 'Experimental assessment and modeling of interphase mass transfer rates of organic compounds in multiphase subsurface systems. Final report, July 1, 1989--June 30, 1993'.

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Abriola, L. M. & Weber, W. J. Jr. Experimental assessment and modeling of interphase mass transfer rates of organic compounds in multiphase subsurface systems. Final report, July 1, 1989--June 30, 1993, report, October 1, 1993; Ann Arbor, Michigan. (https://digital.library.unt.edu/ark:/67531/metadc1279660/: accessed May 22, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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