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 53 for “"Petroleum Hydrocarbons"”.
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Bioremediation of petroleum hydrocarbons using microbial fuel cells
Environmental pollution by petroleum hydrocarbons has serious environmental consequences on critical natural resources upon which all living things (including mankind) largely depend. Microbial fuel cells (MFCs) could be employed in the treatment of these environmental pollutants with concomitant …
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Strategies for enhancing bioelectrochemical remediation of petroleum hydrocarbons
Globally, Petroleum Hydrocarbons (PH) contamination in the environment is widespread due to accidental spillages, leakages and indiscriminate disposal. PH pollutants are continuously a concern because of their high toxicity to humans and the environment. While there have been efforts to remediate …
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Methodologies for the analysis of petroleum hydrocarbons extracted from contaminated soils
Australian research into TPH and BTEX test methods has, to date, not been coordinated and no standard methods have been agreed to. Overseas research also lacks acceptable solutions for the standardisation of TPH and BTEX methodologies. Since Australia carries out many thousands of analyses of TPH …
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Effects of biologically produced surfactants on the mobility and biodegradation of petroleum hydrocarbons
… produced surfactants (biosurfactants) on petroleum hydrocarbons and their potential for the removal of hydrocarbons from groundwater systems. Bioaurfactanta have been found to be produced by microorganisms during growth on insoluble substrates for the purpose of increasing substrate …
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The fate and transport of light petroleum hydrocarbons in the Lower Mississippi River Delta
… governing the fate and transport of light petroleum hydrocarbons in the Lower Mississippi River and other river delta systems are not adequately represented in existing oil spill models. In response, three methods were introduced to include the effects of dynamic annual discharges and …
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Treatment of Petroleum Hydrocarbons in Oil-Based Drill Cutting Mud Using BiOWiSH Bioaugmentation Products
… a respirometer were used for analysis of total petroleum hydrocarbons (TPH) and CO2 production respectively. Five experiments were analyzed by TPH extraction and analysis; four experiments were analyzed by respirometric analysis. The specific microcosm conditions tested in the experiments were …
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Evaluating rhizodegradation of petroleum hydrocarbons and polycyclic aromatic hydrocarbons in wetland sediments containing spartina patens
Biodegradation of petroleum hydrocarbons (PHC) and 16 polycyclic aromatic hydrocarbon (PAH) compounds was evaluated in sediments from a stormwater basin that was a former salt marsh at an active oil refinery. Spartina patens were grown in basin sediments during a field study and a greenhouse study …
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Impacts of Sequential Microbial Electron Accepting Processes on Natural Attenuation of Selected Petroleum Hydrocarbons in the Subsurface Environment
… consortia collected with a soil sample from a petroleum-hydrocarbon contaminated site was capable of biodegrading specific polynuclear aromatic hydrocarbon (PAH) compounds. Results indicated that selected PAH compounds were biodegraded under simulated natural conditions using oxygen and sulfate …
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The effect of feed rate and cracking time on carbon formation during the catalytic cracking of petroleum hydrocarbons
The process of catalytic cracking of petroleum hydrocarbons invariably produces a carbonaceous deposit on the surface of the solid catalyst which serves to reduce the activity of the catalyst. This investigation was undertaken to determine the effect of the feed rate and the length of the cracking …
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Field and Greenhouse Studies of Phytoremediation with California Native Plants for Soil Contaminated with Petroleum Hydrocarbons, PAHs, PCBs, Chlorinated Dioxins/Furans, and Heavy Metals
… for the cleanup of soil contaminated with petroleum hydrocarbons (PHCs), poly-aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), chlorinated dioxins/furans, and heavy metals. This screening was followed by controlled greenhouse experiments to further evaluate the …
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REACTIVE TRANSPORT OF IRON AND HYDROCHAR COLLOIDS IN A HYDROCARBON-CONTAMINATED SUBSURFACE ENVIRONMENT
Petroleum hydrocarbon contaminant bioremediation in anoxic subsurface environments is challenging for three main reasons: the low bioavailability of essential nutrients, especially phosphorus (P); the low bioavailability of petroleum hydrocarbons; and the low bioavailability of terminal electron …
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An investigation of bioremediation for the conservation of petroleum-contaminated stone monuments
… and focuses on the potential effect of chronic petroleum hydrocarbon ground leakage on the subterranean parts of stone monuments. Bibliographic research revealed that there are many references on the effect of air pollution on building stone. However, research has not been expanded to the field …
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Legacy soil contamination by crude oil from the First Gulf War : geochemical characteristics, spatial pattern and environmental risk
… environmental risk assessment.The soil-borne petroleum hydrocarbons were spatially variable. Most of lighter petroleum hydrocarbons in the oil lake area has already been emitted to atmosphere. Under desert climate conditions, downward migration of the spilled oil was limited due to a lack of …
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Biodegradation of benzene in soil systems
The inadvertent release of petroleum hydrocarbons to the subsurface can be an imminent threat to groundwater supplies. Benzene, a water-soluble, carcinogenic petroleum hydrocarbon, is often one of the primary concerns in the cleanup of these underground petroleum leaks. The purpose of this research …
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Development of a Pre-Impact Environmental Site Characterization for the Bryan Mound, Texas Strategic Petroleum Reserve
… and post-spill monitoring using the Strategic Petroleum Reserve's Bryan Mound site as a case study. Bird and vegetation observations provide baseline data for biological conditions, and sediment sampling for total petroleum hydrocarbons serves as a chemical component of the model. Results …
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Studies of the synthesis, environmental occurrence and toxicity of unresolved complex mixtures (UCMs) of hydrocarbons
The occurrence of unresolved complex mixtures of hydrocarbons (UCMs) in the aliphatic fraction of marine sediments and organisms from areas impacted by petroleum hydrocarbons is well documented and widely accepted as an indication of fossil fuel contamination. In contrast, the presence of an …
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The effect of freeze /thaw temperature fluctuations on microbial metabolism of petroleum hydrocarbon contaminated Antarctic soil
<p>Petroleum contaminated soil exists at McMurdo Station in Antarctica. These soils were contaminated with historic releases of JP-8 jet fuel. Over time, there does not appear to have been significant reduction in the petroleum concentrations in these soils. This lack of reduction has been …
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Methanogenic Paraffin Biodegradation and the Underlying Syntrophic Relationships
Petroleum hydrocarbons are important for their energy value and the environmental concerns they pose when spilled. Methanogenic biodegradation through syntrophy plays an important role in their degradation, with implications for remediation and oil recovery. There is still much to learn about …
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Identification and validation of screening methods for assessment of the sheening potential of embedded oil in sediments
Sediments impacted with petroleum hydrocarbons (oil) may sheen due to ebullition-driven transport or sediment disturbance. The goal of this project was to develop a screening method that can be deployed on a small autonomous watercraft that will provide a reliable indication of sheening potential …
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Multi-omic analysis of contaminated sediments from Contrecoeur, QC on Planorbid snails
… contamination (by butyltins, heavy metals, and petroleum hydrocarbons), which can be harmful to aquatic and benthic life. Additionally, future development threatens to further exacerbate the contamination in the area. This study examines the effect of Contrecoeur’s contaminated sediment and …
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