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 24 for “"in-situ remediation"”.
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Hydraulic and Electrokinetic Delivery of Remediants for In-situ Remediation
… zero valent iron (nZVI) has shown promising mobility and in-situ reactivity with chlorinated volatile organic compounds when injected into saturated porous media. The current study evaluated nZVI mobility and subsequent reactivity with in-situ contaminants in a variably saturated porous …
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Fabrication of Novel In-Situ Remediation Tools for Unconventional Oil Contamination
… to deal with UO emergencies. Because bioremediation is considered slow process, physicochemical treatment processes are necessary in removing contaminants to constrain the spread of oil. In preliminary phase of study, bed systems for adsorption of oil compounds packed with modified …
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Evaluation of reactive cap sorbents for in-situ remediation of contaminated sediments
<p>Contaminated sediments can be treated using in-situ treatment methods that aim to either degrade or sequester contaminants, reducing their bioavailability. The main purpose of this research was to develop and evaluate a reactive capping mat that can be used for in-situ remediation of …
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In Situ Remediation Of Heavy Metal Contaminated Sediments Using Emulsified Zero-valent Metal Particles
Sediments can act as both a sink for pollutants and a source for aquatic contaminants. Natural and human disturbances of the sediments can release the contaminants to the overlying water where bottom dwelling, or benthic, organisms may be exposed through direct contact, ingestion of sediment …
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In-Situ Remediation of Small Leaks in Water Pipes: Impacts of Water Chemistry, Physical Parameters and the Presence of Particles
Aging and leaking water infrastructure wastes water resources and creates public health risks. Upgrading of potable water systems represents a large financial burden for water utilities and private property owners. The conventional approaches of repair, rehabilitation and replacement are very …
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Application of Fenton's reagent as an in-situ remediation technique : an analysis of Fenton's reaction kinetics as applied to contaminant plume FS-12 at the Massachusetts Military Reservation
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Remediation and reuse of a former manufactured gas plant site in Champaign, IL
… was to review effective technologies for eliminating contamination associated with manufactured gas plant sites by using in situ remediation. Another aim was to speculate an adaptive reuse of the site through revelatory design such that it unfolds the history of manufactured gas plants as they …
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Solidification and Stabilization of Contaminated Soil
In-situ remediation by Solidification and Stabilization (S/S) has shown huge promise in dealing with the clean up of soils contaminated with pollutants listed as Hazardous Substances under Resource Conservation and Recovery Act (RCRA). The site discussed in this paper was contaminated with …
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Magnetite Oxidation in Aqueous Systems
… an iron oxide, is a possible candidate for in situ remediation of contaminated groundwater systems due to its oxidation/reduction potential for reduction of contaminants such as carbon tetrachloride. Little characterization and analysis has been done to describe the kinetics of magnetite …
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Field Trials of Ex Situ Smouldering Treatment (STARx) of Oil Sludge
Growing environmental concern and regulations around petroleum producing and refining facilities, along with the divesting of legacy properties, have necessitated the need for rapid, high capacity, and cost-effective treatment technologies for remediating these sites and their produced wastes. …
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Chemical performance of cement stabilised contaminated clay
Urban demand has increased the need to redevelop contaminated land. New legislation for land management has actively discouraged previously acceptable dig and dump practices. This has encouraged in-situ remediation approaches, for which stabilisation / solidification (S/S) is particularly suitable …
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Sorption of Metals onto Natural Sediments and Engineered Iron Oxide Nanoparticles
<p>Metal contamination of subsurface environments and engineered water systems can be derived from natural processes and anthropogenic activities associated with industrial processes, past weapons production, and mining works. The toxic and carcinogenic effects of uranium and chromium pose a …
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The effect of calcium and magnesium on carbonate mineral precipitation during reactive transport in a model subsurface pore structure
Carbonate mineral precipitation in the subsurface at the interface of two advecting fluids can result in physical and chemical changes in the pore network. This can affect the effectiveness of various applications including carbon sequestration and in situ remediation. In this work we evaluate the …
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Applications of phytase-mediated phosphate biomineralizaton for the remediation of uranium mine tailings
The mining of elements such as copper, gold, rare earths, and uranium is an essential part of modern society, providing the raw materials for a wide range of applications in technology, industry, medicine, and energy supply. However, the extraction of these and other resources may cause harm to …
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Treatment of contaminated sediments using reactive cap technology: Characterization and modeling of geotechnical, hydraulic and contaminant transport behavior of cap-sediment systems
<p>Reactive cap technology is a promising in-situ remediation solution for contaminated sediment, mainly because it has the potential to reduce costs and environmental impacts when compared to solutions that rely solely on dredging and disposal. Reactive capping mats have been recently used in …
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Efficiency of biosurfactants applied by means of electrokinetics
… efficiency of rhamnolipids (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 …
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An investigation of bioluminescent microbial transport in porus media
Since bacteria play a significant role in the composition of the subsurface, understanding the transport of microorganisms through groundwater and porous media is of great importance. Recently, increased study of microbial transport in the subsurface has been driven by the development of in-situ …
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Sorption of lead and arsenic on soil components and effectiveness of phosphates for remediating lead and arsenic contaminated soils
… as well as serious threats to humans. Clay minerals are potential binding agents for pollutants due to their high cation exchange capacity and large surface area. Laboratory investigations were undertaken to evaluate the effect of Fe and Al hydrous oxide coatings on the sorption of Pb and As. …
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