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 12 of 12 for “"perchloroethylene"”.
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Investigation on the Mechanism of Formation and Consumption of Vinylcobalamins Involved in Vitamin B(12)-Catalyzed Reductive Dechlorination of Perchloroethylene
Similar experiments were undertaken using cobalamins to further investigate the vitamin B12-catalyzed dechlorination of PCE. Chlorovinylcobalamin 16, previously detected in the PCE dechlorination reaction, was synthesized by treating cob(I)alamin with chloroacetylene. The structure of 16 was …
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Kinetic processes and plasma remediation of toxic gases
… Barrier Discharges to the remediation of perchloroethylene (C$\sb2$Cl$\sb4$ or PCE) and N$\rm\sb{x}$O$\rm\sb{y}$. We determine the kinetic processes that occur in remediation in order to devise methods for improving the energy efficiency of remediation.
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Examining women’s knowledge, health risk perceptions, beliefs and behaviours in relation to toxic chemicals commonly found in personal care and household products: a mixed-methods approach
… bisphenol A (BPA), phthalates, triclosan, and perchloroethylene. A questionnaire was administered to 200 women, and 10 women participated in virtual interviews. Multivariate analysis found positive associations between avoidance of lead, parabens, BPA, and phthalates and knowledge, perceived …
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The effects of common household cleaning agents and aging on the removal of quantitatively applied food stains from rayon, nylon, and olefin pile upholstery fabrics
… stain removal with a detergent-vinegar solution, perchloroethylene, isopropyl alcohol, or ammonia water while attached to a simulated chair arm. Soil removal was evaluated by measuring light reflectance and color values on a Hunter Color-Difference Meter®. A consumer panel rated the specimens …
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The Feasibility of Bioaugmentation for the Remediation of Chlorinated Solvents: A Microcosm Study
… most prevalent contaminants at Superfund sites. Perchloroethylene (PCE) and its degradative byproducts pose a particular problem because of their persistence in the subsurface and their threat to ecological health. In this study, microcosms were used to test the viability of bioaugmentation as a …
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Utilization of predispersed solvent extraction for removal and enzymatic degradation of chlorinated solvents in ground water
… amounts of dissolved chlorinated solvents like perchloroethylene (PCE) and trichloroethylene (TCE) from contaminated ground water has been investigated. In PDSE, the solvent is comminuted into globules with diameters ranging from submicron to 100 microns, and stabilized by a surfactant film …
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Studies of hydrophobic organic pollutant interactions with cyclodextrin: implication for groundwater remediation
… (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, Henry’s …
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Degradation Of Halogenated Aliphatic Compounds In Sequential Anaerobic
… sequence to biologically transform perchloroethylene to non-hazardous end products such as ethylene, CO2 and H2 using a single microbial consortia in a methanogenic and/or a homoacetogenic environment followed by a aerobic methanotrophic environment. Reductive dechlorination of PCE …
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Numerical Modeling of Steam Flushing for Removal of Dense Nonaqueous Phase Liquids
… nonaqueous phase liquids (DNAPL), including perchloroethylene (PCE), a mixture of PCE and nonane, and a mixture of monochlorobenzene (MCB) and dichlorodiphenyltrichloroethane (DDT) perched on a barrier layer were simulated with a nonisothermal multiphase, multicomponent model (CompSim) to …
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Measurement and deduction of emissions of short-lived atmospheric organo-chloride compounds
… (TCE, CHClCCl2), and tetrachloroethene (perchloroethylene, CCl2CCl2). A high temporal frequency (hourly) measurement campaign in Nahant, Massachusetts (approximately 10 km. northeast of Boston) provided automated gas-chromatographic measurements for these species as well as the somewhat …
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The Microbubble Assisted Bioremediation of Chlorinated Ethenes
This work focused on using a microbubble dispersion to deliver hydrogen and carbon dioxide to anaerobic consortia to stimulate their ability to reductively dehalogenate tetrachloroethylene all the way to ethene and ethane. A continuous flow system, consisting of six anaerobic soil column …