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Title Ion waves in reactive porous media : coupling acidity and salinity transport through surface chemistry
URL
Publication Date
Date Accessioned
Degree PhD
Discipline/Department Geological Sciences
Degree Level doctoral
University/Publisher University of Texas – Austin
Abstract Transport behavior in groundwater systems is dominated by chemical interactions between aqueous species and the materials that compose the subsurface. The interfacial region between the solid and liquid phase is complex, both in its structure, and electrochemical behavior. Despite this difficulty, much effort has been extended towards a mechanistic understanding of the mineral surface. Such models have been extensively tested in batch settings. In contrast the transport literature is quite sparse. In the present study we extend well established mathematical techniques from chromatography to investigate the role of surface chemistry on the transport of ions in reactive porous media. Of particular importance is the coupled transport of salinity and acidity. Together these quantities determine the charging behavior, and therefore reactivity, of mineral surfaces. The work consists of both experimental and theoretical analyses of the acidity-salinity transport system through quartz sand. The results inform how the electrostatic behavior of the silica surface determines transport of charged species, with implications for a range of fields including CO₂ sequestration, colloid transport, and nuclear waste storage.
Subjects/Keywords Reactive transport; Geochemistry; Acid-base chemistry
Contributors Hesse, Marc (advisor); Cardenas, Meinhard Bayani (committee member); Breecker, Daniel O (committee member); Katz, Lynn E (committee member); Werth, Charles J (committee member)
Language en
Country of Publication us
Record ID handle:2152/65512
Repository texas
Date Retrieved
Date Indexed 2019-09-12
Grantor The University of Texas at Austin
Issued Date 2018-06-22 00:00:00
Note [department] Geological Sciences;

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