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 20 of 31 for “"Soil Remediation"”.
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Foam-surfactant technology in soil remediation
… is being considered as an important to in-situ soil remediation. However research in this area has been limited. Column experiments were conducted to investigate the factors that limit the use of foam as an agent for soil flushing. Pressure build up in the soil is an important factor that was …
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Nanocellulose-based materials for sustainable soil remediation and water purification
Soil and water pollution are intricately linked environmental issues that have gained significant global attention due to their adverse effects on ecosystems, public health, and overall sustainability. In this dissertation, the pressing need for sustainable pollutant treatment using ecofriendly and …
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Modeling of a dielectric barrier discharge (DBD) plasma reactor for soil remediation
… hazards to human health. Recent progress in soil remediation processes includes a promising plasma technology that uses a Dielectric Barrier Discharge (DBD) reactor to produce highly reactive oxidized species. The present work models plasma inside the DBD reactor and evaluates the production …
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The Economic Impacts of Soil Remediation Efforts at Lead Arsenate Contaminated Sites in Yakima County: A Hedonic Approach
… risk to the residents of Yakima, Washington. Soil testing for contaminants resulted in the Department of Ecology funding the remediation of 6 elementary schools in Yakima, Washington where unsafe levels of lead and arsenic were found in the topsoil. This study will evaluate the impact that …
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Phytoremediation Mechanisms of a Creosote-Contaminated Site
… active in the 1950s until 1973. In 1997, a phytoremediation field study was implemented with the planting of 1,026 hybrid poplar trees and 36 cells of vegetated and unvegetated grass and legume treatments. The hybrid poplar tree phytoremediation system was designed to control infiltration and …
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A field screening method for polychlorinated biphenyl compounds in water
… procedure for aqueous extracts resulting from a soil remediation procedure; the extracting liquid typically contains 1-3% PCBs by weight to enhance the solubility of PCBs. A test was developed based on forming complexes of PCBs with Ag{dollar}\sp+{dollar} followed by UV irradiation to form Ag …
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Hydraulic and Electrokinetic Delivery of Remediants for In-situ Remediation
… for persulfate activation for low permeability soil remediation. The study showed that EK delivered persulfate throughout the silt. The application of ERH was successfully able to activate the persulfate within the porous matrix leading to complete in-situ tetrachlorothene (PCE) degradation. To …
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Efficiency of biosurfactants applied by means of electrokinetics
… (biosurfactants) used in electrokinetic remediation of soil contaminated with phenanthrene was presented. Bench scale tests were conducted using four experimental series in order to determine the feasibility and mechanisms of biosurfactant-enhanced phenanthrene removal from mica soil. The …
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Metals Distribution in Roadside Soils and Himalayan Blackberries in Victoria, BC, Canada
… investigated metal contamination in roadside soils and Himalayan Blackberry plants across Greater Victoria, BC. Arsenic (As) and lead (Pb) concentrations in soil samples in some areas exceeded BC Contaminated Sites Regulation soil standards, indicating contamination hotspots linked to high …
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Enhanced petroleum-contaminated soil bioremediation by plants
A petroleum-contaminated soil remediation study was conducted in a greenhouse. The system consisted of 36 pots, 12 were vegetated with squash, 12 were vegetated with fescue grass and the last 12 units served as unvegetated controls. For each group, three treatments were applied, 1) the addition of …
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COMPOST QUALITY RECOMMENDATIONS FOR REMEDIATING URBAN SOILS
Poor soil health is a critical problem in many urban landscapes. Degraded soil restricts plant growth and microorganism activity, limiting the ability of urban landscapes to perform much needed ecosystem services. Amending soil with compost can increase infiltration, microbial biomass, cation …
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A Self-Potential for Monitoring Self-Sustaining Treatment for Active Remediation (STAR)
Self-sustaining Treatment for Active Remediation (STAR) is a novel soil remediation approach for Non-Aqueous Phase liquids (NAPLs) embedded in a porous medium. STAR is based on liquid smoldering combustion which destroys NAPLs while simultaneously generating heat due to the exothermic oxidation …
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Development of an Immersed Boundary Method for the Simulation of Moving Bodies at Fluid-fluid Interfaces
… mineral recovery via froth flotation, soil remediation, and many others. This thesis presents the development of Immersed Boundary Methods (IBMs) coupled to a two-phase incompressible flow solver. The phases are treated as immiscible, and are modelled using the Volume-of-Fluid (VOF) …
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Legacy soil contamination by crude oil from the First Gulf War : geochemical characteristics, spatial pattern and environmental risk
… oil spills in Kuwait. Selection of appropriate soil remediation methods needs to be informed by accurate soil characterization and this knowledge is currently lacking. The aim of this PhD study was to obtain insights into the geochemical characteristics of the aged contaminated soils and, using …
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Surface-Layer Semivolatiles Impact on Hydrochar Application For Fuel and Environment
… have applications as fuels and environmental remediation materials. This dissertation investigates the properties and applications of thermochemical conversion products of agro-industrial waste, focusing on hydrothermal carbonization (HTC) and pyrolysis. The studies in this dissertation focus …
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Biochar as a soil amendment to enhance petroleum hydrocarbon degradation in northern landfarms
… petroleum hydrocarbon (PHC) contaminated soils through conventional landfarming practices. Thus, cost-effective soil remediation strategies that are active under frozen conditions and specific to cold regions are in strong demand. Biochar amendments have been added to soil to sequester …
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The effects of biochar on trace element and nutrient solubility in the presence of low-molecular-weight organic acids
… role in regulating the phytoavailability of soil-borne trace elements and nutrients. Biochar is widely considered as a suitable soil remediation option, having shown an efficacy to retain both anions and cations. This study aims to unravel the roles of LMWOAs in affecting the functioning of …
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Spatial Variability Analysis and Reclamation of Saline-Sodic Soils in the Northern Great Plains
… to the development of sodic and saline/sodic soils in the Northern Great Plains. The objectives of this dissertation were: 1) determine the impact of surface chemical treatments and cover crop on crop yields and soil remediation; 2) determine and describe soil spatial variability and develop a …
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Assessment of gentle remediation options for trace element-contaminated agricultural land under semi-controlled and field conditions
The global soil resources are significantly threatened by pollution. In addition to the existing burden of contaminants in agricultural soils, the increasing anthropogenic input of metal(loid)s, further referred to as trace elements (TE), presents a major public health concern, since it endangers …
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