Browsing PhD Dissertations - DO NOT EDIT by Issue Date
Now showing items 1-20 of 57
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Salinity, pH, Temperature, Desiccation And Hypoxia Tolerance In The Invasive Freshwater Apple Snail Pomacea insularum
(Environmental & Earth Science, 2007-08-23)Pomacea insularum is a tropical and subtropical, ampullariid, freshwater prosobranch snail that is native to slow-flowing rivers and canals in South America. It is a member of the genus, Pomacea, and, like other species ... -
Hydrogeochemical Evolution Of Arsenic Along Groundwater Flow Paths: Linking Aqueous And Solid Phase Arsenic Speciation
(Environmental & Earth Science, 2007-08-23)The central hypothesis of this Doctoral research work is that changes occurring along groundwater flow paths that accompany chemical weathering and oxidation-reduction reactions catalyze both arsenic (As) mobilization from, ... -
Studies of the Performance, Stability and Reliability of Various Configurations of the Activated Sludge Process at Full-Scale Municipal Wastewater Treatment Plants
(Engineering, Environmental, 2009-05-15)This research presents a performance, stability and reliability analysis of five configurations of activated sludge process, viz., conventional, contact stabilization, complete mix, extended aeration and sequencing batch ... -
Trace Element Geochemistry In Groundwater Flow Systems
(Environmental & Earth Science, 2011-03-03)This research focuses on trace element geochemistry in three groundwater flow systems: the Carrizo Sand, the Upper Floridan, and the Aquia aquifers. The focus is threefold: (i) studying the geochemical behavior, concentrations, ... -
Air Emissions From Natural Gas Exploration And Mining In The Barnett Shale Geologic Reservoir
(Environmental & Earth Science, 2011-10-11)This study evaluates air emissions from natural gas mining and production in the Barnett Shale within the Dallas/Fort Worth Metroplex. Due to advances in horizontal drilling and hydraulic fracturing, natural gas production ... -
Bismuth-based Oxide Semiconductors: Mild Synthesis And Practical Applications
(Environmental & Earth Science, 2012-04-11)In this dissertation study, bismuth based oxide semiconductors were prepared using 'mild' synthesis techniques - electrodepostion and solution combustion synthesis. Potential environmental remediation and solar energy ... -
Predicting The Geographic Distribution Of Ancient Soils With Special Reference To The Cretaceous
(Environmental & Earth Science, 2012-04-11)Different kinds of soils form in different climatic regimes. Soils closely match climatic conditions. Therefore, they are one of the best indicators of past climates. This study uses the "climate envelope" technique developed ... -
Numerical Simulation Of The Base-level Buffers And Buttresses Conceptual Model Of Fluvial Systems
(Geology, 2012-07-25)A Buffer in fluvial stratigraphy is a potentiometric surface which defines either: a) the lowest possible depth to which streams will incise; or b) the maximum elevation to which aggradation will occur; together, these ... -
Proximity Of Cancer Cases To Airports Within The State Of Texas
(Environmental & Earth Science, 2012-07-25)Determining whether the incidence of cancer may be associated with pollutants emitted from airports is important in order to better plan cities to reduce such incidences. This research aims to answer the following questions: ... -
On-road Measurement Of NOx And CO₂ Emissions From Biodiesel Produced From Different Feedstocks
(Environmental & Earth Science, 2012-07-25)Biodiesel has generated increased interest in the US and elsewhere recently as an alternative to petroleum-derived diesel. Because it can be produced from domestic feedstocks such as soybeans, canola oil, and even recycled ... -
A Study Of Ecological And Physiological Roles Of The Termite Associated Verrucomicrobium (TAV) Strains Through A System Biology Approach
(Environmental & Earth Science, 2013-07-22)Termite hindguts are populated by a dense and diverse community of microbial symbionts working in concert to transform lignocellulosic plant material and derived residues into acetate, to recycle and fix nitrogen, and to ... -
Development Of A Mathematical Model, VUMP (Vinasse Utilization For Methane Production)
(Environmental & Earth Science, 2013-07-22)Environmental pollution causes ongoing problems. Many countries are faced with the dilemma of finding alternative energy sources that are cost-effective and environmentally friendly. Biofuels have received much attention ... -
Appalachian Delta Plain Paleoecology Of The Cretaceous Woodbine Formation At The Arlington Archosaur Site, North Texas
(Environmental & Earth Science, 2013-07-22)The Arlington Archosaur Site (AAS) is a North Texas fossil locality that preserves a Mid- Cretaceous ecosystem along a low lying coastal plain. The site lies within the Cenomanian (95 Mya) rocks of the Woodbine Formation ... -
The Impact Of Sprawl On Transportation Energy Copnsumption And Transportation Carbon Footprint In Large U.S. Cities
(Environmental & Earth Science, 2014-03-10)Today, climate change and energy shortage are major concerns among scientists, politicians, and economists. For decades in the U.S., emphasis has been placed on improving energy efficiency through technological advances. ... -
Using Spontaneous Imbibition And Mercury Intrusion Porosimetry To Investigate The Effect Of Pore Structure On Fluid Migration Within Porous Media
(Environmental & Earth Science, 2014-07-14)Much research has been conducted to investigate the property of fluid (water/oil/gas) migration in different types of porous media, and the knowledge of pore structure (including pore geometry and pore connectivity) plays ... -
Stable Isotopic And Geochemical Studies Of Late Quaternary Stalagmites, South-Central Appalachian Mountains, Eastern North America
(Environmental & Earth Science, 2014-07-14)A tripartite investigation was conducted utilizing speleothem geochemistry and modern cave environments: reconstruction of paleoclimate variability in southeastern West Virginia that spans the late Pleistocene to mid-Holocene, ... -
Indoor Air Quality In Schools: An Investigation Of The Impact Of Outdoor Air Quality, School Layout, And Room Type
(Environmental & Earth Science, 2014-09-17)Indoor air quality (IAQ) in educational facilities is a very important aspect of the educational process because it may affect the students and staff health and performance. This study was conducted during the 2012-2013 ... -
Investigation Of How Microbes Involved In Anerobic Digestion Of Vinasse Change As Functions Of Temperature, Vinasse Compositions And Time
(Environmental & Earth Science, 2014-09-17)Recent fossil fuel supply crunches and price spikes have prompted increased interest in ethanol as an alternative transportation fuel. However, vinasse, the liquid residue left from the distillation of ethanol, poses serious ... -
Application Of In-situ Remediation By Using Soil Phosphate Amendments At Three Lead Contaminated Soil Sites (residential Yards) In New Orleans, La.
(Environmental & Earth Science, 2014-12)Lead (Pb) contamination of soil continues as a threat to public health. The problem exists, in part, due to the abundance of lead in soil in certain contexts which has the potential to cause adverse health effects in ... -
Effects Of Climate Change And Perturbation In Biogeochemical Cycles On Oxygen Distribution And Ocean Acidification
(Environmental & Earth Science, 2014-12)Dissolved oxygen (DO) concentration in the ocean is an important component of the marine biogeochemical cycles. In this study a global oceanic carbon cycle model (HAMOCC 2.0) was used to address how oxygen minimum zones ...