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 20 for “"Oil contamination"”.
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Fabrication of Novel In-Situ Remediation Tools for Unconventional Oil Contamination
The aftermath of unconventional oil (UO) accidents highlights the lack of preparedness of governments 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 …
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Petroleum effects on soil microbial communities
Crude oil is still the dominant energy source in Brazil where oil consumption keeps rising since 2013, reaching nowadays 2.2% of the world‟s energy consumption. A recent discovery of crude oil reservoirs at the Espirito Santo, Campos and Santos basins, can represent an excellent opportunity to meet …
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Transfer lubrication techniques in a stick slip situation.
… been defined including limiting load ratio and oil contamination conditions.
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Improving construction machine engine system durability in Latin American conditions
… engineering fields of knowledge by analyzing oil samples taken from diesel engines operating in Latin America. Oil samples are leading indicators and predictors for wear in specific components of diesel engines, as they directly connect to the use conditions of actual work environments. The …
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Polycyclic Aromatic Hydrocarbons and the Microbiomes of Two Benthic Species
<p>The presence of oil has been shown to affect the microbiomes of the water column, sediments, and organisms, both by altering the diversity and the composition of those microbial communities. If the microbiome is altered it may no longer provide benefits to its host organism, impacting its …
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The use of microcosms to assess the potential impact of underground bunker crude oil on freshwater aquatic organisms
Historically, crude oil was stored in old underground coal mines collectively known as the Ogies Terminal. A study was conducted to assess the potential environmental impacts of underground bunker crude oil on freshwater ecosystems. The study assessed the impact of sediment contaminated with crude …
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Impacts of selected leguminous tree species and kaolinite pre-amendment on oil-contaminated soil for bioremediation in the oil-bearing region of Nigeria
… Species (LTS) and kaolinite pre-amendment on oil-contaminated soil. It covered assessment of different levels of contamination (0, 25, 50, 75 and 100 ml in 4000 g soil; which represents the degree of light crude oil spillage concentration as 0.0, 0.63, 1.25, 1.88 and 2.5 %v/w) on the growth …
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Application of whole-cell biosensor for the impact of crude oil exploration on the environment of the Niger Delta
The discovery of crude oil in exportable quantities in Nigeria was greeted with overwhelming ovation and high expectations in terms of the wealth generation possibilities and economic growth for the region. However, 5 decades onwards, the Niger-delta terrain and its people have become disenchanted …
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Application of whole-cell biosensor for the impact of crude oil exploration on the environment of the Niger Delta
The discovery of crude oil in exportable quantities in Nigeria was greeted with overwhelming ovation and high expectations in terms of the wealth generation possibilities and economic growth for the region. However, 5 decades onwards, the Niger-delta terrain and its people have become disenchanted …
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An Evaluation of the Effects of Marine Oil-spills, Remediation Strategies, and Shipwrecks on Microbial Community Structure and Succession
The evaluation of how Bacteria respond to oil-contamination, and the application of dispersants and biosurfactants, in North Sea seawater microcosms is the focus of Chapter Two. Analysis revealed that dispersants and biosurfactants, which significantly reduced the interfacial tension between oil …
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Detection and attribution of drought and oil-induced plant stress using hyperspectral remote sensing
… caused by both drought stress and hydrocarbon contamination of the soil. Spectral and plant biochemical measurements were taken from an in-situ field experiment and a glasshouse experiment at the James Hutton Institute, Invergowrie, U.K. The in-situ field experiment was part of an ongoing root …
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Assessment of Petroleum Hydrocarbon Contamination In Terrestrial Ecosystems Using Conventional and Novel Approaches
Petroleum hydrocarbon (PHC) contamination has emerged as a pressing global concern, due to its impacts on human health and ecosystems, and presents a major challenge for remediation efforts. The heterogeneous nature of PHC mixtures and natural weathering processes that influence the bioavailability …
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Simultaneous determination of nitrous oxide and ammonia for measurement of in-situ fluxes from natural ecosystems by gas chromatography with headspace autosampler and electron capture detection
<p>Anthropogenic disturbance of the soil nitrogen cycle by changes in nitrogen and carbon availability influences the production of N2O and NH 3 emissions to the atmosphere affecting the environment and human health. This dissertation presents a new method for automated gas chromatographic analysis …
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NMR response of liquids and of natural gas mixtures
… assist in detecting and characterizing formation oils and gases. This work involves NMR laboratory experiments at a 1 H frequency of 2 MHz. Thermodynamic and transport properties are established by sample preparation or are obtained by measurement or are based on available data. Then, the …
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Characterization of TPH biodegradation patterns in weathered contaminated soil
Two weathered, petroleum contaminated soils were studied to determine if weathered products are amenable to bioremediation and to determine which TPH (total petroleum hydrocarbon) fractions were degrading during particular time frames under different remediation alternatives. Delineation of …
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Assessing the resilience of water supply systems in Oman
… measures because the intake is close to an oil port with a significant risk of oil contamination and algal blooms. The most severe risks to transmission mains were found to be associated with pipe rather than pump failure. The systems in Oman were found to be moderately resilient, the …
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An investigation into factors affecting the efficacy of oil removal from wildlife using magnetic particle technology
… the efficacy of the magnetic removal of oil contamination from a variety of matrices, including feathers and plumage, have been investigated. Employing electron microscopy and an established gravimetric methodology, detailed investigations into the effect of particle size, particle …
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Detection of PAHs in Commercial and Wild Caught Fish Oil using Scanning Fluorescence Spectroscopy
<p>The DeepWater Horizon (DWH) oil spill contaminated a large area in the Gulf of Mexico in summer 2010. It is likely that many aquatic species in the Gulf were affected by the spill. Crude oil contains polycyclic aromatic hydrocarbon (PAHs). Some PAHs are carcinogenic to fish and humans. The …
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Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil.
Environmental pollution from oilfield drilling waste poses potential hazards which can lead to ecological imbalance. The predominant pollutant from oilfield waste is petroleum hydrocarbons. Some effects of petroleum hydrocarbon contamination in soil include loss of nutrients, reduced fertility, …
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Investigation of the effect of hydrocarbon spillages and their interaction with alteration minerals on the flotation of UG2 PGE ore
… used may contaminate the ore because of oil inadvertently leaking from their hydraulic components during mining. Such contaminants have been anecdotally linked to the reduction of downstream flotation performance. Anecdotal evidence suggests that such problems are further exacerbated in …