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Showing 1 to 20 of 107 for “"Adsorption isotherms"”.
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Predicting adsorption isotherms in natural water using polyparameter linear free energy relationships
… matter (NOM) and trace organic contaminants. Adsorption isotherms for trace contaminants in the presence of NOM are needed to predict the performance of activated carbon for removing these compounds, but such data are not available for most of these contaminants and it would be expensive to …
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Characterization Of Nanoporous Materials Using Gas Adsorption Isotherms: Evaluating Their Potential For Gas Storage And Separation Applications
… be used in practical applications involving adsorption, it is important to investigate the basic properties (i.e. isosteric heat, specific surface area, binding energy, pore size, pore volume, etc.) of each material. With this aim in mind we have looked at three different types of materials: …
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Adsorption of binary vapor mixtures into solids
The adsorption isotherms for ethanol-cyclohexane, ethanol-benzene, and benzene-cyclohexane vapor mixtures on Cab-O-Sil and on Graphon at 20, 30, and 40°C were measured at constant total pressure. The adsorption isotherms for the pure components were also obtained. The ethanol/Graphon isotherms were …
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Methane Storage and Adsorption Characteristics in Nanoporous Gas Shale
… where the interaction energy for each adsorption site was related to the multi-scale pore sizes and pore surface property. Besides, methane adsorptions on shale rocks were experimentally measured, and the proposed multi-site model was used to describe the measured adsorption isotherms. …
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The role of micropore size and chemical nature of the pore surface on the adsorption properties of activated carbon fibers
The adsorption isotherms of a series of progressively activated carbon fibers (ACF) with a range of surface areas from 760 $\rm m\sp2/g$ to 2420 $\rm m\sp2/g,$ prepared from phenolic precursors were examined with acetone, n-butane, benzene and nitrogen. The experimental results revealed a …
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Role of adsorption in catalysis: applications of NMR relaxometry
… in this thesis focuses on the effects that adsorption processes on catalytic surfaces pose in controlling key steps that can affect and control reaction pathways. To that, the development of Nuclear Magnetic Resonance (NMR) relaxometry methods and the comparison with traditional catalytic …
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Physical, chemical and mineralogical properties of mine spoil derived from the Wise Formation, Buchanan County, Virginia
… the salts are a nutrient source. K is low, but adsorption isotherms indicate that, unlike the naturally occurring soils of the locality, there is no serious problem of K-fixation in the spoils. NaHCO₃ gives the most accurate measure of spoil P. A response to fertilization is likely. Adsorption …
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The adsorption of ampholytes on activated charcoal
Further evidence regarding the adsorption of organic ampholytes is lacking. It was therefore decided to begin a systematic study of the problem by obtaining adsorption isotherms for some thirty amino acids, vitamins and related compounds on one charcoal. When this was completed representative …
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Measurements of fission product sorption on graphite
… (VHTRs) require data for fission product (FP) adsorption on graphite at high temperatures. The adsorption and vapor pressures of silver on nuclear moderator grade IG-110 graphite were measured in the range of 1000-1400K. Knudsen Effusion Mass Spectrometry (KEMS) was used for vapor pressure …
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Efficiency of natural coagulants for treatment of public market wastewater
… optimal conditions determined in this study. The adsorption isotherms and equilibrium model of adsorption system were analysis using Langmuir and Freundlich models. The adsorption isotherms studies were fitted well by Langmuir model than Freundlich model. The RL value was 47.39 mg/L, 9.20 mg/L, …
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THE MICROSTRUCTURES OF ESTUARINE PARTICLES
… Creek was carried out using a nitrogen adsorption technique. The surface areas and porosities of the particles were determined using BET theory and capillary models applied to the gas adsorption isotherms. The surface areas of the suspended particles collected on axial transects of the …
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Disposal of Bituminized and Other Low- and Medium-Level Wastes: Waste Characterization and the Retention of Migrating Radionuclides by Steel Corrosion Products
… quantitatively. Traditional and non-traditional adsorption/desorption experiments on steel corrosion products using 0.01-M NaCl and 0.001-M NaCl solutions with two different concentrations of Sr were performed including one system with slow flow. Langmuir and Freundlich adsorption isotherms were …
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Surfactant Aggregation in the Bulk Fluid and at the Fluid-Wall Interface
… both in the bulk phase and by surface adsorption, and characterize the formation of hemimicelles at the solid-fluid interface. Using a simple surfactant model consisting of Lennard-Jones sites connected by non-harmonic springs many features of real bulk surfactant solutions, including …
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Adsorption of sulfate and phosphate at the mineral-water interface: isotherm, stoichiometry, and models
… for the availability of plant nutrients. Sulfate adsorption at three pH levels was conducted on y-AI203 and kaolinite. The adsorption isotherms were described well by the simple Langmuir, two-site Langmuir, Freundlich, and Temkin equations. The capacity of SO42-adsorption for y-AI203 was five …
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Design of High Efficiency Fibers for Ion Exchange and Heavy Metal Removal
… arsenite was presented through equilibrium adsorption isotherms. All fibrous systems were characterized through a variety of techniques such as scanning electron microscopy, diffuse reflectance infrared spectroscopy, elemental analysis, analytical analysis, and thermal analysis of the …
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Adsorption of Surfactants and Mixed Surfactants at the Hydrophilic Silica/Water Interface Studied Using Total Internal Reflection Raman Spectroscopy and Target Factor Analysis
Adsorption of dimethyldodecylamine oxide (DDAO), Triton X-100 (TX-100), and their mixtures at the hydrophilic silica/water interface has been studied using total internal reflection (TIR) Raman spectroscopy and target factor analysis (TFA). The use of a vibrational spectroscopic technique gives …
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Measurements, Modeling and Analysis of High Pressure Gas Sorption in Shale and Coal for Unconventional Gas Recovery and Carbon Sequestration
… of gases (methane and carbon dioxide) and their adsorption behavior in shale and coal. This dissertation therefore analyzes adsorption isotherms, thermodynamics, and kinetics properties of methane and carbon dioxide in shale and coal based on experimental results to provide preliminary answers to …
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A theoretical study of metal-organic frameworks
… frameworks (MOFs) provide a new vision for the adsorption of molecules on solid surfaces. The interest in MOFs is owed to their ultrahigh porosity, high surface areas and tuneable pore sizes and shapes. The main objective of this thesis was to adopt a rational predictive capacity used in MOF …
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