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 192 for “"Total Organic Carbon"”.
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Total Organic Carbon and Clay Estimation in Shale Reservoirs Using Automatic Machine Learning
High total organic carbon (TOC) and low clay content are two criteria to identify the "sweet spots" in shale gas plays. Recently, machine learning has been proved to be effective to estimate TOC and clay from well loggings. The remaining questions are what algorithm we should choose in the first …
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Removal of Total Organic Carbon and Emerging Contaminants in an Advanced Water Treatment process using Ozone-BAC-GAC
… treatment technologies. Low molecular weight organic compounds are especially challenging to remove and may require treatment optimization. The overarching purpose of this study was to demonstrate the feasibility of a carbon-based advanced treatment train; including ozonation, biological …
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Poly(ethylenimine)-Functionalized Pyroxene Nanoparticles Embedded on Diatomite for Removal of Total Organic Carbon from Industrial Wastewater: Batch and Fixed-bed studies
… limits. Specifically, presence of dissolved organic compounds not properly eliminated during the wastewater treatment has a negative impact on human health and the environment. As a novel solution, nanotechnology holds great potential in water and wastewater treatment to improve water quality …
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Evaluating Conservation Agricultural Management for Soil Health Outcomes in Southeastern Virginia
… resistance (as depth to root restrictive layer), total organic carbon, carbon stocks, saturated hydraulic conductivity, and yield were measured repeatedly over a seven-year period to better understand the longitudinal response of these properties to management. Bulk density and saturated hydraulic …
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Trihalomethane-forming potential of algal extracellular products and biomass
… investigate the extent to which algal-produced organic matter may react with chlorine in aqueous solution to form trihalogenated methanes. Two species each of green and blue-green algae were cultured in an inorganic medium and harvested on several days throughout the growth cycle. Media …
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The impact of glaciation and climate change on biogeochemical cycling and landscape development
… kyr event revealed average values for percent total organic carbon to be 4% with a range of 0.2% to 15.2%. The average decreased to approximately 2.1% with a range of 0.4% to 5.3% during and after the event. Occluded phosphorus averaged 488 µg/g before the 8.2 kyr event and 547 µg/g after but …
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Chlorophyll diagenesis in the water column and sediments of the Black Sea
… column and sediments. Measurements are made of total chlorophyll in sediment traps from two locations and depths in the water column, and at two locations in surface sediments. Individual chlorophyll degradation products are also identified. This data is used to construct a mass balance of …
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Effects of installing point-of-use filters intended for lead removal on drinking water quality
… point-of-use (POU) filters made of activated carbon and ion exchange media in classroom sinks. Before and after common stagnation periods at the school (e.g., overnight, over-the-weekend), water samples were collected from a spigot where water enters the school and from sinks with and without …
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Bioremediation of biodiesel and diesel contaminated soil by pseudomonas putida
… these contaminants containing polyaromatic hydrocarbons (PAHs) in soil is toxic to humans, plants and soil microorganisms due to their recalcitrant and mutagenic or carcinogenic properties. Therefore, this study was conducted to suggest a new technique of treatment to clean up the biodiesel and …
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Faunal, sedimentological and geochemical indicators of dysoxia in Cretaceous marine sediments
… of 'Oceanic Anoxic Events' during which organic matter was extensively deposited in 'black shale' facies. Although diverse criteria for the recognition of low oxygen levels have been described previously they have not been fully calibrated. This project compares palaeooxygenation related …
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Impact of bark beetle infestation on water quality and hydrology in the Rocky Mountain West, The
… that were used to determine how changes in total organic carbon concentrations and composition will influence metal mobility under beetle-impacted trees indicate that a large needle pulse after bark beetle-induced tree death and subsequent decomposition will enhance soil-water concentrations …
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Effects of feed oil content, transmembrane pressure and membrane rotational speed on permeate water quality in high-shear rotary ultrafiltration
… in the HSRUF system. Permeate oil grease and total organic carbon concentrations increased with transmembrane pressure and feed oil content due to the increased density or thickness of the solute concentration boundary layer. However, hydraulic turbulence created by membrane rotation minimized …
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Ozone treatment of a selected textile dyeing and finishing wastewater
… biochemical oxygen demand, pH, dissolved oxygen, total organic carbon, ozone residual, total and suspended solids, and turbidity. The results of the investigation showed that color was removed to a significant degree from the selected wastewater by the action of ozone. Up to 80 percent of the …
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Stable isotope and organic biomarker analysis of the late Proterozoic Coppercap formation in the MacKenzie Mountains
Sulfur and carbon stable isotope ratios and organic biomarker abundance were performed on drill core samples from the Coppercap Formation of the Coates Lake Group in the Windermere Supergroup of the MacKenzie Mountains to reconstruct an environmental condition proceeding the first Neoproterozoic …
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CO2 Derived Carbon Capture Using Microalgae in a PhotoBioCREC Unit
Microalgae has the potential to contribute to carbon dioxide capture, resulting in the production of alternative fuels and valuable chemical products. To accomplish this, high-efficiency photobioreactors must be conceptualized, designed, and established, in order to achieve high inorganic carbon …
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Investigating the Relationships Between Age and Depth of Stockpiled Topsoil with Its Nutrient Content: An Analysis of Responsible Factors and Potential Consequences
… analyzed for pH, macronutrients, micronutrients, total organic carbon and organic matter. Descriptive statistics and correlation analysis were used to determine if there were significant chemistry changes between age and depth of stockpiled soils. The results indicated a small change in organic …
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Relating treatment process decisions to sludge management concerns at water plants
In this study, the effects of organics removal efficiency, oxidant dose, and alum dose on aluminum hydroxide sludge characteristics were assessed. In order to maintain control over operating parameters, a continuous-flow laboratory-scale plant was operated in the laboratory with daily monitoring of …
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Preliminary Experiments on Photo-Electro Catalytic Oxidation of Recalcitrant Organic Compounds Dissolved in Water
… as electrolysis, the bases of degrading soluble organic compounds can be improved within the reactor. Applications of doping and secondary catalysis are effective in increasing the process of photoactivity within the catalytic reactor, theoretically increasing the production of sacrificial …
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Polymer-supported reagents for disinfection of water
… The sulfonic acid groups were determined by a total ion exchange capacity measurement. The sulfonamide groups were chlorinated mainly to the dichlorosulfonamide groups by laundry bleach acidified with acetic acid. The concentration of sulfonamide groups was determined by its chlorine holding …
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The Removal of Low Levels of Phenol by Activated Carbon in The Presence of Biological Activity
Bioregeneration of activated carbon was shown to occur in bench-scale carbon columns through use of parallel bacterially seeded and non-seeded, non-bioactive columns. Phenol degrading organisms were taken from an enrichment using phenol as sole carbon source. Mass balance calculations on phenol and …
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