Browsing Earth and Environmental Sciences by Title
Now showing items 22-41 of 431
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Behaviour and Treatment of Nitroaromatics in Groundwater
(University of Waterloo, 2007-09-25)The purpose of this study was to determine the chemical and/or biological factors that cause 2,4-dinitrotoluene (2,4-DNT), 2,6-dinitrotoluene (2,6-DNT) and nitrobenzene (NB) to transform to their respective aromatic amines ... -
Behaviour of apatite during partial melting of metapelites and consequences for prograde suprasolidus monazite growth
(Elsevier, 2017-03-01)The suprasolidus behaviour of apatite and monazite is examined for an average metapelite composition using phase equilibria modelling coupled with solubility equations of these minerals. Both closed- and open-system scenarios ... -
Behaviour of Mesoporous Silica (MCM-41) Supported Catalysts in Degradation Reactions
(University of Waterloo, 2013-01-08)A research project was carried out to investigate several aspects of Mobil’s composition of matter #41 (MCM-41) pertaining to its potential application in water treatment technologies. The goal of the work was to lead to ... -
Behaviour of Oxygenates and Aromatic Hydrocarbons in Groundwater from Gasoline Residuals
(University of Waterloo, 2007-01-23)ABSTRACT This study focuses on the dissolution and near-source attenuation of oxygenated gasoline hydrocarbons in groundwater from two gasoline residual sources: one containing gasoline with 9.8% methyl tert butyl alcohol ... -
Behaviour of Pharmaceutically Active Compounds in contact with Reactive Media in Simulated Ground Water
(University of Waterloo, 2008-09-03)Water treatment approaches for pharmaceutically active compounds (PhACs) are restricted by the chemically-variable nature of the PhACs themselves, each successful in treating only a small number; or the adaptability or ... -
Bench Scale Performance of Partitioning Electron Donors for TCE DNAPL Bioremediation
(University of Waterloo, 2008-05-08)Prior to the implementation of an enhanced bioremediation pilot study for a trichloroethene (TCE) source area at an industrial site in the United Kingdom (the Site), laboratory microcosm and column studies were performed. ... -
Bioenergetics of mixotrophic metabolisms: A theoretical analysis
(University of Waterloo, 2019-08-29)Many biogeochemical reactions controlling surface water and groundwater quality, as well as greenhouse gas emissions and carbon turnover rates, are catalyzed by microorganisms. Representing the thermodynamic (or bioenergetic) ... -
Biogeochemical cycling of nutrient silicon in a human-impacted large lake nearshore environment (Hamilton Harbour Area of Concern, Lake Ontario, Canada)
(University of Waterloo, 2017-12-14)The biogeochemical cycling of nutrient silicon (Si) through rivers, wetlands, lakes, and artificial reservoirs regulates the magnitude and bioavailability of Si delivered downstream and to the ocean (Frings et al. 2014; ... -
Bioretention cells under cold climate conditions: Effects of freezing and thawing on water infiltration, soil structure, and nutrient removal
(Elsevier, 2019-02-01)Bioretention cells are a popular control strategy for stormwater volume and quality, but their efficiency for water infiltration and nutrient removal under cold climate conditions has been poorly studied. In this work, ... -
Building and characterizing low sulfide instrumented waste rock piles: Pile design and construction, particle size and sulfur characterization, and initial geochemical response
(University of Waterloo, 2009-08-31)A rigorous laboratory and field study to measure and compare low sulfide waste rock and drainage characteristics at various scales has been designed and implemented. The field study was constructed at the Diavik diamond ... -
A ca. 273-261 Ma multi-component arc pluton in the southern area of the Beishan Orogenic Collage, NW China: a geochronological, geochemical, and petrogenetic analysis
(University of Waterloo, 2022-09-29)Along the southern edge of the Central Asian Orogenic Belt lies the Beishan Orogenic Collage, bridging the Tianshan Orogen (west) to the Mongolia-Xing’anling Orogen (east). The Beishan Orogenic Collage is thought to represent ... -
Carbon Cycling in a Glacier Ice Meltwater Impacted Freshwater System of the Canadian High Arctic: Biogeochemical Processes of the Lake Hazen Watershed
(University of Waterloo, 2022-03-23)Accelerated glacier ice mass loss and intensified meltwater fluxes are among principal vectors of change affecting northern latitudes in a warming climate. Aquatic systems impacted by glacier ice meltwater are vulnerable ... -
Characterisation and Analysis of Catastrophic Landslides and Related Processes using Digital Topographic Data
(University of Waterloo, 2014-08-14)This thesis represents a large body of work that seeks to describe, quantify, and simulate the behaviour of large rock slope failures (> 1 Mm³), in the form of landslides and rock avalanches, and their secondary processes, ... -
A Characterization of Bromine and Chlorine Stable Isotopes in the Sand Hills Region of Nebraska, USA
(University of Waterloo, 2015-09-21)Saline lakes and salt flats are capable of releasing a significant flux of reactive bromine into the atmosphere, a compound which is 45-70 times more efficient at ozone destruction than chlorine (Eggenkamp, 2014; Risacher ... -
Characterization of High-PGE Low-Sulphur Mineralization at the Marathon PGE-Cu Deposit, Ontario
(University of Waterloo, 2013-03-13)The Marathon PGM-Cu deposit is hosted by the Coldwell alkaline complex, which consists predominantly of gabbro and syenite and was emplaced at 1108 Ma as part of the Mid-Continent Rift System. Mineralization at the Marathon ... -
A characterization of the controls of the nitrogen and oxygen isotope ratios of biologically-produced nitrous oxide and nitrate in soils
(University of Waterloo, 2011-08-02)Nitrous oxide (N₂O) is a potent greenhouse gas, an important driver of climate change, and its concentration in the atmosphere is rising at an unprecedented rate. Agriculture is the leading contributor of all the anthropogenic ... -
Characterizing and Modelling Tailings Hydrogeochemistry Under a Composite Cover at the Abandoned Kam Kotia Mine, ON
(University of Waterloo, 2023-01-09)A principal environmental concern associated with mining is the weathering of mine waste in the presence of oxygen and water that generates acid mine drainage (AMD) concentrated in toxic elements. Installation of composite ... -
Characterizing Aspects of Groundwater Flow in Discontinuous Permafrost Terrain, Within the Central Mackenzie Valley, NWT
(University of Waterloo, 2021-05-26)With recent developments in oil and gas exploration technologies that have opened regions of Canada’s northern territories and the threat of climate change, uncertainties around how these factors may impact the environment ... -
Characterizing Chromium Isotope Fractionation During Reduction of Cr(VI): Batch and Column Experiments
(University of Waterloo, 2012-02-22)Chromium (VI) is a pervasive groundwater contaminant that poses a considerable threat to human health. Remediation techniques have focused on the reduction of the highly mobile Cr(VI) to the sparingly soluble, and less ... -
Characterizing low-sulfide instrumented waste-rock piles: image grain-size analysis and wind-induced gas transport
(University of Waterloo, 2011-01-18)This study is part of the Diavik Waste-Rock Pile Project taking place at the Diavik Diamond Mine in the Northwest Territories, Canada. The project involves the construction of three 15m-scale low sulfide test waste-rock ...