Browsing Science (Faculty of) by Supervisor "Blowes, David"
Now showing items 1-16 of 16
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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 ... -
Copper Isotope Fractionation and the Evolution of Sulfide Alteration in a Sudbury Tailings Impoundment
(University of Waterloo, 2016-10-18)The fate of dissolved Cu in the Copper Cliff Central Tailings Impoundment was investigated to better understand the extent of Cu stable isotope fractionation accompanying the oxidation of Cu-bearing sulfide minerals and ... -
Evaluating Controls on Arsenic Geochemistry at the Long Lake Gold Mine in Sudbury, ON
(University of Waterloo, 2020-06-01)The release of As from old mine sites can persist long after cessation of mining activities. This project combines field and laboratory research components at the Long Lake Gold Mine site, near Sudbury, Ontario. The mine ... -
Geochemical and Microbiological Characterization of the Historic Waste Rock Piles at the Detour Lake Gold Mine
(University of Waterloo, 2016-09-16)Four of the historic waste rock stockpiles (WRS #1-#4) at the Detour Lake mine site were studied to determine the potential for generation of acid rock drainage (ARD). The stockpiles were constructed during the original ... -
Impacts of Dredging and Brush Cutting of Paired Agricultural Drainage Ditches on GHG Emissions and Nutrient Filtration Capacity
(University of Waterloo, 2023-01-04)Agriculture provides many beneficial and essential ecosystem services. Along with these beneficial services, the conversion of natural ecosystems into heavily modified agricultural ecosystems is also a source of ... -
Integration of non-traditional stable isotopes and synchrotron measurements
(University of Waterloo, 2022-08-31)Selenium is well named after the moon, because statements about this element must often be qualified, making it feel ever changing; for instance, Se is a nutrient, but an excess of 400 µg per day is toxic for humans. High ... -
Investigation of Gas Transport Rates Through a Covered Waste Rock Pile and Synchrotron Studies on the Sulfide Oxidation Reaction
(University of Waterloo, 2017-01-19)This thesis presents a field based investigation into gas transport mechanisms and rates through a waste-rock pile with a low permeable cover, and a synchrotron based study into intermediate sulfidic species that are ... -
An Investigation of Heterogeneity and the Impact of Acidic Regions on Bulk Effluent from a Deconstructed Low Sulfide Waste-Rock Pile
(University of Waterloo, 2017-05-15)Waste rock is a potential source of low quality drainage resulting from oxidation of naturally occurring sulfide minerals. Sulfide oxidation may result in the generation of effluent with elevated concentrations of SO4 and ... -
THE MEASUREMENT OF INTER-PARTICLE DIFFUSION COEFFICIENTS IN MINE WASTES
(University of Waterloo, 2021-05-04)Acid mine drainage (AMD) is the release of acidic waters from mines, waste-rock piles and mine tailings impoundments containing high concentrations of SO4, Fe(II) and other metal(oid)s. The bulk of AMD generation occurs ... -
A mechanistic approach to assessment of the geochemical evolution of low sulfide mine-waste rock
(University of Waterloo, 2019-01-04)The potential for mine wastes to generate elevated concentrations of solutes including metals, sulfate, and reduced pH exists wherever mine-waste rock is stockpiled at the Earth’s surface representing one of the world’s ... -
Metal Isotope Fractionation Associated with Cu and Zn Attenuation by Zero-Valent Iron in Anaerobic Flow-Through Cell Experiments
(University of Waterloo, 2018-01-12)Metal stable isotope fractionation is an emerging tool in the environmental sciences for studying biogeochemical pathways for cycling of metals in the environment. Copper and zinc are essential elements for many biological ... -
Nickel Isotope Geochemistry in Mine Waste System
(University of Waterloo, 2021-01-13)Metal stable isotope analyses have proven to make valuable contributions to the study of the biogeochemical cycling of metals and metalloids in the environment. Processes that control the release, mobility and fate of ... -
Oxidation characteristics, acid neutralization, secondary minerals, and trace elements associated with pyrrhotite oxidation in historical waste rock
(University of Waterloo, 2022-07-27)The Detour Lake Mine is an open pit, greenstone-hosted gold mine in Ontario, Canada. Mining produced waste-rock piles that were constructed from 1983 – 1999. Redevelopment and expansion of the open pit required the excavation ... -
Removal of Arsenic and Metals from Mine-impacted Groundwater Using Organic Carbon and Zero-valent Iron in Passive Remediation Systems
(University of Waterloo, 2020-09-21)Arsenic (As) is a wide-spread contaminant, often encountered in drainage associated with Au mining. The oxidation state controls the mobility and toxicity of As in water. Passive remediation is a potential management ... -
Source and Fate of Contaminants in a Pit Lake and Water Treatment at the Faro Mine Complex
(University of Waterloo, 2022-05-20)The Faro Mine Complex (FMC) is an abandoned zinc-lead mine in Yukon, Canada that requires extensive remediation efforts to manage the environmental liabilities associated with mine wastes stockpiled at the site. Active ... -
Stabilization of Mercury in River Water and Sediment Using Biochars
(University of Waterloo, 2016-11-29)Mercury (Hg) is a common contaminant in air, oceans, lakes, rivers, soils, and sediments as elemental, inorganic and organic forms. Organic Hg (e.g., methylmercury (MeHg)), which is much more toxic than other forms and can ...