Browsing Earth and Environmental Sciences by Subject "remediation"
Now showing items 1-12 of 12
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Application of Biochar to Stabilize Mercury in Riverbank Sediments and Floodplain Soils from South River, VA under Conditions Relevant to Riverine Environments
(University of Waterloo, 2020-01-07)Disposal of mercury (Hg) containing products related to industrial activities has led to large-scale watershed contamination across the globe, posing long-term risks to human health due to its persistent properties. Hg in ... -
Assessing Microbial Viability and Biodegradation Capabilities in Sandstone
(University of Waterloo, 2017-11-17)Environmental practitioners have demonstrated enhanced in situ bioremediation (EISB) in homogeneous unconsolidated soils to remediate chlorinated solvents. However, EISB has not been fully investigated in bedrock environments. ... -
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 ... -
In situ chemical oxidation using unactivated sodium persulphate at a former fuel storage facility
(University of Waterloo, 2011-06-21)Petroleum hydrocarbon (PHC) contamination poses a serious threat to aquifer systems worldwide. Accidental releases of PHCs due to gasoline spills and leakage from underground storage tanks can often result in PHC subsurface ... -
Long-Term Fate of an Emplaced Coal Tar Creosote Source
(University of Waterloo, 2007-10-09)An emplaced source of coal tar creosote within the sandy Borden research aquifer has provided an opportunity to document the long term (5140 days) natural attenuation for this complex mixture. Plumes of dissolved chemicals ... -
Mercury Transformation and Release from Contaminated Soil Following Perturbations in Solution Chemistry and Application of Polysulfide
(University of Waterloo, 2018-04-09)Mercury (Hg) is a contaminant of concern due to the very high toxicity and bioaccumulating nature of organic Hg and the persistent leaching of Hg to water bodies from contaminated soils and sediments. The deleterious ... -
NAPL Recovery Using CO<sub>2</sub>-Supersaturated Water Injection: Distribution of the CO<sub>2</sub> Gas Phase
(University of Waterloo, 2006)Gas inFusion? is a novel remedial technology that dissolves CO<sub>2</sub> into water under pressure for NAPL recovery. As the supersaturated liquid flows through the porous medium gas evolution occurs in situ as the ... -
Pulsed Biosparging of the E10 Gasoline Source in the Borden Aquifer
(University of Waterloo, 2008-10-27)Air sparging is a technique used to remediate gasoline contamination. In sparging, air is injected below the target zone and removes contamination via two separate mechanisms; volatilization and biodegradation. In ... -
Remediation of Pentaerythritol Tetranitrate (PETN) Contaminated Water and Soil
(University of Waterloo, 2007-11-28)Pentaerythritol tetranitrate (PETN), a nitrate ester, is widely used as a powerful explosive and is classified as a munitions constituent of great concern by DoD in U.S.A. It is an environmental concern and poses a threat ... -
Selenate Reduction by Granular Iron and the Associated Isotope Fractionation
(University of Waterloo, 2013-11-27)Research in selenium isotopes has been gaining interest as new contaminated sites are identified around the world. Selenium is an emerging contaminant, as it is increasingly being released through anthropogenic activities. ... -
Some Aspects of Arsenic and Antimony Geochemistry in High Temperature Granitic Melt – Aqueous Fluid System and in Low Temperature Permeable Reactive Barrier – Groundwater System
(University of Waterloo, 2008-02-11)Arsenic and antimony are important trace elements in magmatic-hydrothermal systems, geothermal systems and epithermal deposits, but their partitioning behavior between melt and aqueous fluid is not well understood. The ... -
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 ...