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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 44 for “"Sorptive"”.
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Capturing Stormwater Nitrate and Phosphate with Sorptive Filter Media
Soluble phosphate and nitrate are more bioavailable than particulate forms. These nutrients result in eutrophication in both freshwater (typically phosphate-limited) and marine (typically nitrate-limited) systems. In addition, nitrate poses a public health risk at elevated concentrations in …
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PAH and PCB distribution in sediment fractions and sorptive phases
… the relative contaminant loading of each of the sorptive phases. Bioavailability of contaminants in oil and grease, soot and organic carbon, components of sediment total organic carbon (TOC), may be vastly different. Physical properties are also different and determine fate during treatment. This …
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The sorptive behavior of organic compounds on retorted oil shale
Oil shale is a valuable natural resource of oil. The United States has only 5% of the known world reserves of recoverable crude oil and about 73% of the known world reserves of recoverable oil shale. Before there can be full-scale commercial development of oil shale, the problems associated with …
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Development of Soluble Manganese Sorptive Contactors for Enhancing Potable Water Treatment Practices
… natural greensand effect in a post-filtration sorptive contactor for application at water treatment facilities. The process of adsorption and oxidation of Mn onto oxide-coated media grains in the contactor will be used for the removal of soluble Mn. However, small media grains, such as sand or …
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Preparation and application of new sorptive polymers applied to wine with a focus on removal of 3-isobutyl-2-methoxypyrazine
… components due to their versatile and stable sorptive properties. Moreover, polymers such as polyvinylpolypyrrolidone (PVPP) can be used as fining agents in the winemaking process and polymeric materials have been investigated as a remedial treatment to remove undesirable compounds from wines. …
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Mass transfer, creep and stress development during the drying of red oak
… strain, visco-elastic creep and "set" or mechano-sorptive creep. The magnitude and variation of each of these components was measured during the first four days of drying under increasingly severe conditions. Using a slicing technique to cut very thin wafers of wood parallel to the surface, the …
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Transient moisture effects on the viscoelasticity of synthetic fibers and composites
… moisture conditions. This is termed the mechano-sorptive phenomenon. The thrust of this research effort is to study the mechano-sorptive effects on the creep behavior of synthetic fibers and composite materials. This study consisted of two main parts: 1). a phenomenological investigation of the …
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Contaminant diffusion and sorption of an artificial leachate in selected geologic barriers of Frankonia, Bavaria, Germany
… extent, low hydraulic conductivities and high sorptive characteristics. Since hydraulic conductivity is no longer the single criteria to determine transport and retardation of contaminants in geologic landfill barrier materials, diffusive and sorptive characteristics of 4 different clay and …
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COMPLEXATION AND PARTICLE-WATER INTERACTIONS OF NICKEL IN ESTUARIES
… speciation of dissolved Ni was determined by adsorptive cathodic stripping voltammetry (ACSV), and the sorptive behaviour of Ni was studied under simulated estuarine conditions using " Ni coupled to liquid scintillation counting. A relatively high particle reactivity was observed only in the …
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Dynamic chamber system for determining equilibrium phosphorus concentration (EPC0) in sediments
… amount of P received by downstream lakes. The sorptive capacity of sediments for P is commonly determined by measuring the Equilibrium phosphorus concentration (EPC0) of a sediment. EPC0 is typically measured by batch reactors where small quantities of sediment and water are continuously shaken …
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Development of multi-residue and selective methods for the ultra-sensitive determination of endocrine disrupting chemicals in aqueous samples
… work, a multi-residue method is developed using sorptive extraction in combination with in-situ derivatization. Since the extraction of polar analytes is limited when using sorptive extraction with polydimethylsiloxane (PDMS), a novel type of sample preparation namely sorptive membrane solvent …
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Quantification of complex phosphorus removal reactions occurring within wetland filtration treatment systems
… conducted at lab (bench) scale. Three potential sorptive media were studied in the research program, namely gravel, slag and clinker. Several methods for media analysis were investigated as potential screening tools for media selection. To determine the various forms of phosphorus in the media, …
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Integrated Numerical Modeling of Spatial and Time-Variant Hydrologic Response in Subsurface Drained Watersheds
… data, compared to simulations that considered sorptive flow alone. Simulations also showed that drain responses were in better agreement with observed flows during low rainfall, as compared to high rainfall. Results from the application of the integrated model to the Upper Little Vermilion …
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LABORATORY-SCALE INVESTIGATION OF PERMEABILITY AND FLOW MODELING FOR HIGHLY STRESSED COALBED METHANE RESEROVIRS USING PULSE DECAY METHOD
… the accuracy of the calculated permeability for sorptive rocks. In order to verify the optimized design theoretically, a modified mathematical model is presented and describes the one-dimensional fluid flow in porous media by a partial differential equation. The numerical solutions of the model …
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Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation
… on remineralization of Porg was found. Instead, sorptive protection appears to be an important mechanism for Porg preservation, and structure may act as a secondary control due to preferential sorption of specific Porg compound classes.
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The Analysis of Flavor Compounds in Green Tea Using Ice Concentration Linked with Extractive Stirrer (Icecles)
… solid-phase microextraction (SPME), and stir bar sorptive extraction (SBSE). Although each of these techniques works well, they each have a number of disadvantages, including selectivity, relatively high cost, long preparation time, and matrix effects. Ice concentration linked with extractive …
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Control of viruses in drinking water with visible light-activated TiON/PdO photocatalyst: performance dynamics associated with regeneration and activation
… E.coli was further explored with MS2 phage. The sorptive affinity of the material for viruses, coupled with its potential to oxidize contaminants at its surface when illuminated by visible light, may provide a novel means to couple with solar disinfection to provide continuous and effective point …
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Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation
… on remineralization of Porg was found. Instead, sorptive protection appears to be an important mechanism for Prog preservation, and structure may act as a secondary control due to preferential sorption of specific Porg compound classes.
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An investigation into the use of smectitic clay soil for the containment and treatment of petrochemical waste
… non-aqueous); and, secondly, to investigate the sorptive capacity of the clay fraction of the soil for two common groundwater contaminants, benzene and phenol, in the context of the potential for using treated clays for decontaminating BP10 and other organic wastes. The Rensburg soil was compared …
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