Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"aqueous geochemistry"”.
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Apophyllite weathering and the aqueous geochemistry of a Karoo breccia pipe
Apophyllite is a phyllosilicate mineral commonly associated with hydrothermal environments. It is a major secondary phase occupying fractures in a dolerite breccia pipe on the farm Kopoasfontein, outside Calvinia in the western Karoo, South Africa. Groundwater abstracted from this breccia is …
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Contributions to predicting contaminant leaching from secondary materials used in roads
… and reactive transport, Bayesian statistics, and aqueous geochemistry of leaching.</p><p>Contributions on water movement and reactive transport in highways included probabilistic prediction of leaching in an embankment, and scenario analyses of leaching and transport in pavements using HYDRUS2D, a …
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Characterizing Variable Flow Pathways And Geochemical History Of Seepage Under The Mississippi River Levee: 2011, 2015, And 2016 Floods
… 2011 flood, demonstrated the potential for using aqueous geochemistry to differentiate sand boils forming at the end of deep and shallow flow pathways, though the study was limited to cation and trace metal analyses. Sampling during the 2015 and 2016 events for temperature, conductivity, redox …
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Microbial Iron Geochemistry of a Pristine Glaciofluvial Groundwater System
… groundwater resources due to their influence on aqueous geochemistry, including contaminant mobility. This thesis expands on knowledge of groundwater-surface transitions through the characterization of an iron cycling biofilm dominated groundwater spring, and presents the first in situ …
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Microbiology of the sulfur-dominated glacial ecosystem at Borup Fiord Pass, and high Arctic low-temperature spring associated microbial mats, The
… function (metagenomic sequencing), and aqueous geochemistry. 16S rRNA gene sequencing data revealed Flavobacterium was common to almost all samples. Sulfur-oxidizing microorganisms (Sulfurimonas, Sulfurovum, and Sulfuricurvum), and an organism that specializes in the disproportionation …
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An aqueous geochemical and hydrologic study of the springs and wells of the Sevilleta National Wildlife Refuge : evaluating hydrochemical pathways
The Rio Grande is a regionally important water source, but the smaller rift springs are also a vital resource for livestock and wildlife. Several springs are located on rift-bounding faults and exhibit a mixing of larger volume meteoric recharge with small volume, chemically potent "endogenic" …
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Microbial diversity and groundwater chemistry in a pristine aquifer
The Mahomet aquifer, a pristine water resource spanning much of central Illinois, is home to a diverse ecosystem of bacteria and archaea. We examined this microbial community at 18 wells across the aquifer by filtering cells suspended in groundwater and trapping sediment-bound populations on …
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Low Temperature Phase Relations in the System H2O-NaCl-FeCl2
The low temperature phase behavior of the system H2O-NaCl-FeCl2 was examined using synthetic fluid inclusions. Experiments were conducted along the 5 wt% NaCl (relative to the total solution) pseudobinary, with FeCl2 concentrations varying from 2 to 33 wt%, and along the pseudobinary defined by …
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Coupling source term, mineral reactivity and flow in radionuclide transport
The focus of this work is to investigate the dissolution of MW25, a non-radioactive simulant of UK high-level nuclear waste borosilicate glass, and to predict its performance in the near field of a geological repository. A single-pass flow-through (SPFT) experimental system was used to measure the …