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 93 for “"Total Organic Carbon (TOC)"”.
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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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Pilot-scale study on anaerobic/aerobic treatment of a textile dye wastewater
… the treatment schemes and analyzed for: color, total organic carbon (TOC), 5-day biochemical oxygen demand (BODs), chemical oxygen demand (COD), total phosphorus, sulfide, sulfate, total Kjeldahl nitrogen (TKN), ammonia, nitrate, chloride and oxidation-reduction potential (ORP). Nearly 50% color …
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Biological Treatment of a Synthetic Dye Water and an Industrial Textile Wastewater Containing Azo Dye Compounds
… objectives were to achieve reductions in the total kjehdal nitrogen (TKN) and total organic carbon (TOC) in the wastewater. Anaerobic and aerobic treatment systems were both effective in reducing the wastewater color; however, anaerobic treatment generally produced the greatest color removal. …
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Characterising water treatment works performance using fluorescence spectroscopy
Organic matter (OM) in drinking water treatment is a common impediment responsible for increased coagulant and disinfectant dosages, formation of carcinogenic disinfection-by products (DBPs), and microbial re-growth in distribution system. The inherent heterogeneity of OM implies the utilization of …
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A Preliminary Investigation of Physical-Chemical Treatment of Slagging Gasifier Aqueous Effluent
… Results were based mainly on wastewater residual total organic carbon (TOC). A treatment facility was designed and economically evaluated.</p> <p>It was found that slagging gasifier wastewater is treatable by physical-chemical means using activated carbon and chemical oxidation as the two …
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Production, characterization, and applications of biochar from olive processing byproducts
… including chemical oxygen demand (COD), total organic carbon (TOC), and total phosphorus. The lead adsorption efficiency of these biochar products was also assessed in lead nitrate solution, with kinetic models revealing adsorption mechanisms. Additionally, soil amendment trials were …
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Evaluation of treatment alternatives for THM-precursor removal from the Po River and Ni River, Virginia
… dioxide preoxidation, and powdered activated carbon pretreatment for the removal of trihalomethane (THM) precursors from the Po River, the Ni River and the Ni River Reservoir waters in eastern Virginia. The effects of temperature and storage were also studied. Samples were collected on two …
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Factors influencing the behavior of hydrocarbons in stormwater runoff during quiescent settling
… for influencing the sedimentation of hydrocarbons in stormwater runoff during quiescent settling. Bulk runoff water samples were generated by simulation of a typical rainstorm. An area of pavement at a gasoline filling station was washed down with tapwater and the resultant runoff was …
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The removal of specific molecular weight fractions of trihalomethane precursors by alum coagulation
… concentration, pH and the molecular weight of organic substances present in a water were evaluated in regards to the removal of trihalomethane (THM) precursors from a surface water supply, Peak Creek, in southwestern Virginia. Water was coagulated with various doses of alum with the pH …
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Three screening tests used to evaluate groundwater quality
… were to investigate the use of the parameters total organic carbon (TOC), total organic halide (TOX), and the photoluminescent bacterial bioassay, Microtox (Beckman Instruments, Carlsbad, CA.) as screening parameters for the evaluation of groundwater quality. This objective was accomplished …
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Nutrient Dynamics in Stormwater Runoff from Green Roofs with Varying Substrate
… compost, many nutrient concentrations, such as total organic carbon (TOC), total nitrogen (TN), nitrate-N (NO3-N), and other physiochemical properties have been reduced. However, even after two years, P concentrations in runoff water still exceed 1 mg/L from green roofs using compost in the …
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Using TiO2 to Optimize the Photocatalytic Degradation of Kraft Black Liquor Using Response Surface Methodology
… adhesives, and dispersants. In recent years, photocatalysis has become an alternative to degrade black liquor into short chain carbon chemicals. This study aims to optimize the performance of black liquor photocatalytic degradation using the TiO2/UV system. Five practical factors were selected to …
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Outcrop to subsurface stratigraphic analysis of the Juana Lopez member of the Mancos Shale, northwestern CO, U.S.A.
… bioclastic sandstone interbedded with organic-rich shale. Facies analysis of core and outcrops across northwestern Colorado indicates the presence of proximal, sand-prone facies to the north and distal, mud-prone facies to the south. The results of facies analysis and correlations …
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An integrated geochemical and sedimentological analysis of a lacustrine Lagerstätten in the Triassic Cow Branch Formation of the Dan River Basin
… lake water. Geochemical evidence, including total organic carbon (TOC), pyrite sulfur and iron speciation data suggest anoxic, ferruginous waters. At the lagerstätte interval, TOC content increases significantly, coinciding with the presence of darker, more laminated sedimentary lithofacies. …
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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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Aspects of Cyclic Sedimentation in the Upper Mississippian, Mauch Chunk Group, southern West Virginia and southwest Virginia
… seasonal cycles driven by the annual monsoon. Total organic carbon (TOC) values are a proxy for annual climatic cycles. TOC contents are higher within intermonsoonal and lower within monsoonal components of annual cycles reflecting, respectively, lesser and greater dilution by terrestrial flux.
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Evaluation of Constructed Wetlands and Pretreatment Options For the Treatment of Flow-through Trout Farm Effluent
… demonstrated significant (p <0.05) removal of total ammonia-nitrogen (TAN), total phosphorus (TP), total organic carbon (TOC), total suspended solids (TSS), five-day biochemical oxygen demand (BOD5), and turbidity. Treatment occurred predominantly within the wetland cells, with minimal removal …
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Pollution prevention and treatability of phosphate laden wastewater in the seafood industry
… orthophosphate (OP), condensed phosphate (CP), total phosphate (TP), chemical oxygen demand (COD), total organic carbon (TOC), pH, and total suspended solids (TSS). Shrimp wastewater from industry one had an average pH of 6.06, COD of 4,750 mg/L, TSS of 270 mg/L, TOC of 1,990 mg/L, TP of 221,700 …
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A seismic stratigraphic analysis and petroleum system characterization of the cretaceous sequence in central Walvis basin, offshore Namibia
… margin, has long been recognized for its hydrocarbon potential. With only nine (9) exploration wells drilled to date, the Walvis Basin remains relatively under-explored. The uncertainties concerning the occurrence and preservation of mature source rocks and good reservoir lithofacies in the …
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Effect of combined UV and free chlorine on the formation of chloronitromethanes
… formed, with glycine forming a higher amount of total HNMs compared to methylamine (MA) and dimethylamine (DMA). The source of water can also affect which HNM species is formed in greater concentrations. The limited number of real water samples showed that the river waters have higher than normal …
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