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 94 for “"TCE"”.
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Bioremediation of Trichloroethylene: Analysis of the Plant Gene Response to TCE and Characterization of a Novel TCE-Degrading Endophyte
… common environmental contaminant. High levels of TCE have the potential to cause liver damage and malfunctions in the central nervous system, and it is considered a likely human carcinogen. More than 54% of Superfund sites in the United States are contaminated with TCE. This research explored two …
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Investigating the Biostimulating Effects of ESO Addition to a TCE Contaminated Site
… such as perchloroethene (PCE), trichloroethene (TCE), dichloroethene (DCE), and vinyl chloride (VC) to non-toxic compounds in a process called reductive dechlorination. Microorganisms that are capable of dechlorination usually require reducing conditions as well as bioavailable hydrogen and …
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A Numerical Model (SEAM3D) to Assess the Biotransformation of Chlorinated Ethenes at a TCE/BTEX Contaminated Site
… analysis showed the biotransformation of TCE to DCE, VC, and ethene. A numerical model was developed to simulate and assess the extent to which reductive dechlorination and direct anaerobic oxidation were responsible for the biotransformation of the chlorinated ethenes. Reductive …
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Modeling biotic and abiotic decay of trichloroethylene (TCE) using the Reactive Multi-Species Transport in 3-Dimensional Groundwater Aquifers (RT3D) code
… liquids, DNAPLS, such as trichloroethylene, TCE, is vital to improving the health of groundwater systems. TCE contamination of groundwater systems is of significant concern and its removal a significant challenge. One of the main causes of delays in cleanup of a TCE contaminated site results …
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A statistical approach to understanding microcosm methods for microbially mediated dechlorination of trichloroethene in bedrock aquifers
… reductive dechlorination of trichloroethene (TCE) in fractured rock aquifers. Microcosms constructed with unincubated crushed rock in groundwater provided the best microcosm model of in situ TCE degradation, when prepared and incubated to simulate the in situ environment. Microcosms …
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THE EFFECTS OF TRICHLOROETHYLENE ON HEART DEVELOPMENT
Trichloroethylene (TCE; TRI; C2HCl3) is an organic solvent used as an industrial degreasing agent. Due to its widespread use and volatile nature, TCE is a common environmental contaminant. Trichloroethylene exposure has been implicated in the etiology of heart defects in human populations and …
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Spatial Relationship between the Trichloroethylene Degrading Bacteria Dehalococcoides Sp., Sulfate Reducers and Archaea during Reductive Dechlorination
Trichloroethylene (TCE) released to the environment is of great concern due to its toxicity and carcinogencity. The microorganisms involved in bioremediation of TCE such as methanogens (organisms within the domain Archaea), sulfate reducing bacteria (SRB) and Dehalococcoides sp. (DHC) are of …
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Simulating Remediation of Trichloroethylene in Fractured Bedrock by Thermal Conductive Heating Using the Numerical Model TMVOC
… was contaminated with trichloroethylene (TCE) which was a common solvent used at the facility. The pilot test consisted of 15 heater/extraction wells installed to a depth of 16.8 m in weathered mudstone and operated for 102 days. Rock core samples were taken pre- and post-remediation to …
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Electrochemical and thermochemical destruction of chlorinated solvents
… work, the anodic oxidation of trichloroethylene (TCE) on an Ebonex ceramic electrode was investigated. TCE could be oxidized to CO₂, CO, Cl⁻, and ClO₃⁻. The disappearance of TCE was first-order, independent of pH, and initial TCE concentrations. TCE oxidation occurred only on the anodic surface …
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Understanding Structure-Property Relationships for Palladium-Gold Nanoparticles as Colloidal Catalysts
… hydro dechlorination (HDC) of trichloroethene (TCE) as the model reaction. Catalyzed TCE HDC is a potential approach for water pollution control, in which colloidal Pd-decorated Au NPs (Pdf Au NPs) are known to be significantly better catalysts than monometallic Pd ones. X-ray absorption …
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Engineering palladium-on-gold bimetallic nanoparticles as groundwater remediation catalysts
… organics, in particular trichloroethene (TCE) due to its exposure as a solvent to degrease metals and electronic parts in the automotive, metals, and electronic industries. Due to its prevalence and toxicity, TCE has been listed as one of the most hazardous organic compounds. Physical …
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An Exploratory Study of the Systemic Effects of Lead, Trichloroethylene, and a Mixture of Lead and Trichloroethylene Provided Concurrently by Oral Gavage to Male Rats
… oil, corn oil and 2,000 mg/kg trichloroethylene (TCE), corn oil and 2,000 mg/kg lead carbonate, or a mixture of 2,000 mg/kg each TCE and lead carbonate, in an effort to determine whether or not dual administration of both TCE and lead would have an additive effect on neurotoxicity and overall …
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Electrochemical Deactivation of Nitrate, Arsenate, and Trichloroethylene
… reductive dechlorination of trichloroethylene (TCE). TCE reduction resulted in nearly stoichiometric production of acetate. Rates of TCE reduction were found to be independent of the electrode potential at potentials below -1 V with respect to the standard hydrogen electrode (SHE). However, at …
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Studies of hydrophobic organic pollutant interactions with cyclodextrin: implication for groundwater remediation
… pollutants (HOPs) including trichloroethylene (TCE), perchloroethylene (PCE) and benzene, toluene, ethylbenzene and o-xylene (BTEX), were measured over a range of temperatures (35, 45, 55 and 65°C) and cyclodextrin (CD) concentrations (0, 10, 20, 50 and 100 g L-1). In aqueous CD solutions, …
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Heterogeneous Photooxidation of Trichloroethene on Titanium Oxides Encapsulated in Zeolites L and Y
… heterogeneous photooxidation of Trichloroethene (TCE) on titanium particles (TiOx) encapsulated in zeolite pores was studied using Transmission FT-IR. The decomposition was performed by utlizing two distinctly different pore structures. These were the interconnected supercages of zeolite Y and the …
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Investigating Controls on Variation in Isotopic Fractionation during Biodegradation of Chlorinated Ethenes and Ethanes
… biodegradation was inhibited by trichloroethene (TCE) co-contamination. This finding provided the basis for carbon isotope-based assessment of 1,1,1-TCE biodegradation at a TCE co-contaminated field site. The wide range of carbon isotope fractionation observed for anaerobic tetrachloroethene (PCE) …
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Capsule-based Ultrasound-mediated Targeted Drug Delivery
… minimal progress in advancing therapeutic CE (TCE). Targeted drug delivery (TDD) is a therapeutic modality that could be combined with CE. It allows drugs to be delivered to the diseased tissue, enhancing effectiveness and reducing side effects. Several proof of concept TCEs for TDD exist (Parr …
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Field and laboratory investigations of solute transport through soil
… as an alternative to study trichloroethylene (TCE) fate and transport through zero-valent metals. Dissolved TCE was passed through columns filled with sand, iron, or copper-platted iron filings (Cu-Fe) at three velocities and effluent breakthrough curves were determined with an on-line HPLC. …
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