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 99 for “"contaminated sites"”.
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Assessing the environmental risks associated with contaminated sites
… in critical and potentially dangerous sites, such as incinerators, landfills and industrial areas or in broader geographical areas. The application of the proposed integrated index provides a preliminary quantitative analysis of possible environmental alerts due to the presence of one …
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An Evaluation of Different Risk Ranking Systems for Contaminated Sites
Risk ranking systems for contaminated sites have been developed by different jurisdictions with similar purpose, but it is not clear whether they provide results that are comparable. The United States’ Preliminary Assessment (PA) system, Sweden’s Methods for Inventories of Contaminated Sites (MICS) …
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Evaluating the sustainability of monitored natural attenuation in groundwater at chlorinated ethene contaminated sites
… contaminants in groundwater systems. Five DoD sites were selected for this study, where the common thread between the sites is the existence of a mature chlorinated ethene groundwater plume and the use of MNA as the long-term remediation strategy. Constituent specific NAC values were quantified …
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Sustainability of reductive dechlorination at chlorinated solvent contaminated sites: Methods to evaluate biodegradable natural organic carbon
… natural attenuation process in chloroethene-contaminated aquifers where organic carbon combined with reducing redox conditions support active dechlorinating microorganisms. At sites where natural organic carbon (NOC) associated with the aquifer matrix provides fermentable organics, the …
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The Economic Impacts of Soil Remediation Efforts at Lead Arsenate Contaminated Sites in Yakima County: A Hedonic Approach
<p>Area-wide lead-arsenate contamination stemming from the widespread use of pesticides in the early 1900s poses a serious health 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 …
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Sustainability of Reductive Dechlorination at Chlorinated Solvent Contaminated Sites: Metrics for Assessing Potentially Bioavailable Natural Organic Carbon in Aquifer Sediments
… under site-specific conditions. At chloroethene contaminated sites where MNA is used as a remediation strategy, microbially-mediated reductive dechlorination is typically the dominant pathway for natural attenuation. The efficacy of reductive dechlorination at sites with no anthropogenic carbon …
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A geography of the disruptive effects of contaminated sites on residents’ mental health: The regulation of PFAS sites in NSW, Australia
… This thesis explores how the regulation of sites contaminated by per- and poly-fluoroalkyl substances (PFAS) relates to the mental health and wellbeing of residents living with the contamination. This relationship was explored through thematic analysis of interviews with residents and …
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Assessment of Petroleum Hydrocarbon Contamination In Terrestrial Ecosystems Using Conventional and Novel Approaches
… make it difficult to predict the toxicity of PHC-contaminated sites. Despite their usefulness in accurately determining risks at PHC-contaminated sites, traditional toxicity tests are labourious and time-consuming. Hence, there is an urgent need to develop methods to predict PHC toxicity and …
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Evaluation of PFAS in Environmental Solids: Retention Devices and a Screening Method
… ways to limit PFAS spread and quickly identify contaminated sites.To address this first need, environmental and bench-scale tests were conducted to investigate PFAS sorption to sediment retention devices and to evaluate their potential to limit PFAS spread. Devices such as straw wattle and …
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Heavy metal distribution in Wrigley Head, Moston Brook, Greater Manchester,Northwest England : implications for risk assessment and remediation
Heavy metal contaminated sites pose potential environmental and health problems and represent a great barrier to the beneficial use of contaminated sites. Therefore, the study of heavy metal contamination is a vital knowledge gap which, when filled, will facilitate development of sound management …
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The gamma distribution as an alternative to the lognormal distribution in environmental applications
… applications dealing with data from contaminated sites the positively skewed lognormal distribution has been the most commonly used model. The upper confidence limit (UCL) of the arithmetic mean of a lognormal population is computed by using the H-statistics. Recent concerns have …
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Life history traits and population processes in marine bivalve molluscs
… I analyzed the vital rates of clams at clean and contaminated sites. The effects of contaminants measured in the lab do not necessarily predict population condition in the field. Since surviving with a long life span contributes the most to fitness in broadcast-spawning bivalves, effects on …
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Assessment of exposure and effects associated with polycyclic aromatic hydrocarbon contamination in south Chattanooga, Tennessee
… pollutants. The close proximity of residents to contaminated sites in southern Chattanooga initiated an assessment of the potential human health risks. The research presented herein is part of this larger assessment. The results of a concomitant study indicated significantly higher levels of soil …
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Geochemical changes, plant growth and ecosystem recovery in soils after high temperature remediation
… effectively remove toxic organic compounds from contaminated sites, opening them up for re-development or environmental enrichment. However, these treatments generate elevated temperatures in the soil (40-1200°C) that may impact its quality, particularly its ability to support plant growth and …
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2-D and 3-D tools for electrical imaging in environmental applications
… thesis is focused on the characterization of contaminated sites via the application of non-invasive methods, such as electrical resistivity and electromagnetic techniques. With the aim of improving the relationships between geophysical parameters and hydro-geological features of the subsoil, …
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Using polyethylene passive sampling to assess transport of polychlorinated biphenyls (PCBs) between contaminated sediments, water, and biota
… there are ongoing efforts to remediate these sites, our ability to implement effective remediation strategies has been hindered by a limited understanding of how PCBs are transported in the environment as well as how they bioaccumulate into aquatic animals. Investigations of contaminated sites …
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