• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Pore-Scale Characterization of Organic Immiscible Liquid in Natural Porous Media Using Synchrotron X-ray Microtomography

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_etd_1703_sip1_m.pdf
    Size:
    45.74Mb
    Format:
    PDF
    Description:
    azu_etd_1703_sip1_m.pdf
    Download
    Author
    Schnaar, Gregory
    Issue Date
    2006
    Advisor
    Brusseau, Mark L.
    Committee Chair
    Brusseau, Mark L.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    The objective of this study was to characterize the pore-scale morphology of organic immiscible liquid residing within natural porous media. Synchrotron X-ray microtomography was used to obtain high-resolution, three-dimensional images of solid and liquid phases in packed columns. The image data were processed to generate quantitative measurements of organic-liquid blob morphology and organic liquid-water interfacial area. Five porous media comprising a range of median grain-sizes and grain-size distributions were used to evaluate the impact of porous-medium texture on organic-liquid blob morphology. The sizes and shapes of the organic-liquid blobs varied greatly, ranging from small spherical singlets to large, amorphous ganglia. The majority of the total organic-liquid surface area and volume was associated with the largest blobs. The distribution of blob sizes was greatest for the porous medium with the broadest particle-size and pore-size distributions. Organic-liquid blob morphology was additionally compared in two-phase (organic liquid-water) and three-phase (organic liquid-air-water) systems. In the three-phase systems, lenses and films of organic-liquid were observed in contact with air. Lenses were not observed in the two-phase systems. The presence of organic-liquid lenses and films resulted in larger surface area-to-volume ratios. The impact of dissolution on organic-liquid configuration and interfacial areas in two-phase systems was assessed. Organic-liquid blobs decreased in size and number as the columns were flushed. Separation of large multi-pore ganglia into distinct units was observed. Decrease in interfacial area correlated well with the decrease in organic-liquid volume. A one-dimensional first-order mass transfer expression was able to match effluent concentrations reasonably well with a single value of the mass transfer coefficient. In the final component of the study, immiscible-fluid configuration and interfacial areas were compared among organic liquid-water, air-water and air-organic liquid systems for two porous media. For both porous media, the nonwetting-phase configuration and interfacial areas were similar for the three two-fluid pair systems. This indicates that nonwetting phase configuration and wetting-nonwetting phase interfacial area are similar irrespective of the specific fluid pair. Properties of the porous medium appear to have a greater influence on the magnitude of specific total interfacial area for a given saturation than fluid properties or wetting-phase history.
    Type
    text
    Electronic Dissertation
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Soil, Water and Environmental Science
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Dissertations

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.