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 16 of 16 for “"Tetrachloroethene"”.
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Evaluation of Enhanced Bioremediation for Reductive Dechlorination of Tetrachloroethene (PCE): Microcosm Study
… were capable of partial dechlorination of tetrachloroethene (PCE) to cis-dichloroethene (cis-DCE). This study attempts to achieve complete reductive dechlorination with amendments to static microcosms to test the hypotheses that nutrient-limited or microorganism-limited conditions exist in …
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Measurement and deduction of emissions of short-lived atmospheric organo-chloride compounds
… CHCl3), trichloroethene (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 …
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Microbial Growth On Anthropogenic Compounds By Reductive Dehalogenation Or Oxidation
… some of these compounds and, in the case of tetrachloroethene (PCE), detoxify it by producing ethene. Its genome contains a putative prophage, which could inhibit its ability to grow to high densities and cause phage mediated cell death. This phage was evaluated by genomic comparisons and …
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Investigating Controls on Variation in Isotopic Fractionation during Biodegradation of Chlorinated Ethenes and Ethanes
… isotope fractionation observed for anaerobic tetrachloroethene (PCE) biodegradation has been a matter of longstanding controversy. This work found the magnitude of carbon isotope fractionation for PCE biodegradation is related to the phylogenetic relationships between PCE-degrading organisms, …
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Advanced Data Analysis Of In-Situ Bioremediation Site Data Using Dimensionality Reduction Techniques
… remediation technology for the treatment of tetrachloroethene (PCE) and trichloroethene (TCE) due to its inexpensiveness and flexibility for low-strength remediation applications. A typical ISB implementation involves the collection of large amounts of data to address the many possible …
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Redutive Dehalogenation of Chlorinated Alkanes by Novel Bacteria at the PetroProcessor of Louisiana Inc. Superfund Site
… 2-chloropropane), chlorinated alkenes (tetrachloroethene, trichloroethene, 1,2-dichloroethenes, vinyl chloride), and chlorinated benzenes (1-chlorobenzene and 1,2-dichlorobenzene) were not dehalogenated. Phylogenetic analysis based on 16S rRNA gene sequences showed these isolates to …
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Bioindicators of Reductive Dechlorination in a Dehalococcoides ethenogenes-Containing Mixed Culture: Transcriptional Trends With Respect to Substrate Type, Substrate Concentration, and Culture Operation
… (D2) capable of reductively dechlorinating tetrachloroethene (PCE) successively to trichloroethene (TCE), cis-1,2-dichloroethene (cDCE), vinyl chloride (VC), and non-toxic ethene using H2 as electron donor. Gene transcripts associated with general cell activity, including those corresponding …
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Ionisation studies of chlorinated and fluorinated compounds
… trichloroethene (C\(_2\)HCl\(_3\)) and tetrachloroethene (C\(_2\)Cl\(_4\)). Comparison between the data from the photoionisation and the ion-molecule reactions show that the dominant charge-transfer mechanism is long-range in nature. Detailed studies of the reactions of cations with the …
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COMBINING GEOCHEMICAL AND NUMERICAL MODELING FOR CHLORINATED SOLVENTS GROUNDWATER CONTAMINATION
… chloroethene. The more chlorinated ones such as tetrachloroethene (PCE) and trichloroethene (TCE) are better degraded via reductive dechlorination (RD) under anaerobic conditions, while the less chlorinated compounds such as dichloroethene (DCE) and vinyl chloride (VC) are better degraded via …
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Hydraulic and Electrokinetic Delivery of Remediants for In-situ Remediation
Nano-scale 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 …