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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 34 for “"Adsorption mechanisms"”.
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The modeling and analysis of the electroosmotic flow, diffusion, electrophoretic migration, and adsorption mechanisms of charged and uncharged adsorbates in capillary electrochromatography systems employing charged adsorbent particles - comparisons between theory and experiments
… layer on the electrically-driven mass transport mechanisms of electroosmotic flow (EOF) and electrophoretic migration, as well as the interplay of these transport mechanisms with the diffusion and adsorption mechanisms of charged and uncharged solutes in charged chromatographic media employed in …
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Single-molecule imaging studies of protein dynamics
… thesis covered three broad topics. First, the adsorption mechanisms of proteins onto hydrophobic and hydrophilic fused silica surfaces were imaged and reversible and irreversible adsorption mechanisms were observed. The second topic covered a new technique for measuring the diffusion …
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The Role of Pore Size Distribution in Competitive Adsorption on Activated Carbon
Based on these competitive adsorption mechanisms it was proposed that in order to minimize the impact of NOM on micropollutant adsorption capacity and adsorption kinetics, the adsorbent must have a wide range of micropore sizes, including pores of similar size to the target compound.
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Studies on the reactivity of thiophosphate/thiophosphinate and ethyl xanthate with precious metals
Adsorption mechanisms of modified thiol collectors on gold, silver, and gold-silver alloys have been studied and compared with those of ethyl xanthate (EX). The modified thiol collectors include dicresyl monothiophosphate (DCMTP), dialkyl dithiophosphinate (DTPI) and monothiophosphinate (MTPI). In …
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Studies of the growth of silicon and germanium overlayers: Surface, interface, and thin film formation
… Ge-on-Si overlayers were systematically studied. Adsorption mechanisms, surface species, chemical reactions, atomic composition and ordering, and film morphology during the growth using molecular beam epitaxy (MBE) and vapor phase epitaxy (VPE) were thoroughly investigated. In these studies, …
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Sorption Characteristics of Veterinary Ionophore Antibiotics Monensin and Lasalocid and Soil Clay Constituents Kaolinite, Illite and Montmorillonite
… soil and aquatic biota. This research focuses on adsorption mechanisms of Monensin (MON) and Lasalocid (LAS) to clay constituents common in agricultural soils. Methods were developed to extract these compounds from water, soil, and sludge and for subsequent analysis using liquid chromatography …
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Degradation Of Selected Organic Agrochemicals In Artificial Soil Slurry Systems By Anodic Fenton Treatment
… most probably due to its pH buffering and adsorption capacity. A kinetic model, which was shown to fit the experimental data quite well (R2>0.99), was developed to describe the carbaryl degradation in the soil slurry during the AFT process. In the presence of humic acid, carbaryl …
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High-throughput platforms for investigating bioadhesion and cell migration
… study demonstrated the interplay between protein adsorption mechanisms, surface chemistry, and polymer properties on the efficacy of thermally controlled, reversible bioadhesion. I also used these large format gradients to generate shallow immobilized protein gradients to investigate the effect of …
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Production, characterization, and applications of biochar from olive processing byproducts
… from olive byproducts was evaluated as an adsorption agent for treating olive mill wastewater, measuring parameters 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 …
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Computational study of low index surface of an anatase TiO2 doped with ruthenium (Ru) and strontium (sr) for application in Dye sensitized solar cells
… doping approaches i.e., substitutional and adsorption mechanisms were considered in this study. The results showed that absorption band edges of Ru and Sr-doped anatase TiO2 (1 0 0) surface shift to the long wavelength region compared to the bulk anatase TiO2 and undoped anatase TiO2 (1 0 0) …
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Molecular simulation of biomaterials and biomolecules at the solid-liquid interface
… selection techniques. However, detailed mechanisms of peptide adsorption on inorganic surfaces have largely escaped characterization. This knowledge would open new routes for the rational design of nanostructures and composite biomaterials. The development of accurate and computationally …
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Surface properties of New York talc as a function of pH, polymer adsorption and electrolyte concentration
… and structure talc, and its effect on the adsorption mechanisms of different types of polymeric depressants in the presence of varying types of metal cations in solution in the context of mineral flotation. The surface potential of talc was investigated using rheological, titration and …
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Effect of pH on adsorption and desorption equilibria and kinetics of 2-nitrophenol and phenol onto two activated carbons.
… was to investigate the impact of pH on the adsorption equilibria, adsorption kinetics, desorption equilibria and desorption kinetics. A study was conducted by using 2-nitrophenol (2NP) and phenol as organic pollutants and F-400 and WV-B carbons as adsorbents. The batch adsorption isotherms …
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Etude de la flottabilité de la malachite à l'aide de l'amylxanthate de potassium et d'un acide gras. (Cas d'étude: Flottation du minerai oxydé de Kamfundwa au Katanga en RDC)
… to surface phenomena and collector attachment mechanisms and on other side on improvement of processing flowsheet at industrial scale. The first part of our results concerns theoretical aspects related to floatability of malachite. Due to their surface properties, oxides are difficult to float …
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Graphene chemical and biological sensors : modeling, systems, and applications
… response profiles that incorporates two ammonia adsorption mechanisms--one reversible and one irreversible.
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Characteristics and Mechanisms of Heavy Metal and MTBE Adsorption on Zeolites and Applications in Permeable Reactive Barriers
… the immobilization of multiple contaminants via adsorption, precipitation, degradation, etc. The reactive media are key components of PRBs and their selection needs to consider the immobilization ability as well as permeability. Zeolites have high adsorption capacity, diverse pore structure and …
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Thermodynamic and transport properties of self-assembled monolayers from molecular simulations
… MC simulations are employed to obtain nitrogen adsorption isotherms for unmodified and modified MCM-41 material models. Furthermore, the density profiles of alkyl chains and nitrogen molecules are analyzed to clarify the differences in the adsorption mechanisms in unmodified and modified …
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Heterogeneous integration of graphene and Si CMOS for gas sensing applications
… not only increases current understanding on adsorption mechanisms of molecules to graphene, but also takes another step toward commercialization of graphene sensors.
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The thermochemical behaviour of thiol collectors and collector mixtures with sulphide minerals
… reactions by continuously measuring the heats of adsorption as the reactions between thiol collector (and collector mixtures) and sulphide minerals (and mixed minerals) proceed in real time. The enthalpy of adsorption does not only characterise the intensity of adsorption between a collector and …
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Steuerung der Bioverfügbarkeit von Chloraromaten durch Tensid-modifizierte Tonminerale : Sorption und biologischer Abbau
… on the clay surface and in the interlayers. Adsorption turned out to be completely reversible. DCP and MCB intercalated in the organoclays´ interlayers led to an enlarged interlayer distance, which could be detected by x-ray diffractometry. The course of the adsorption isothermes differed for …
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