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Showing 1 to 20 of 290 for “"Isotherm"”.
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From adsorption to condensation: The Zeta adsorption isotherm approach
The Zeta Adsorption Isotherm is based on the hypothesis that molecules adsorb on a solid surface as a collection of molecular clusters. The theory is extended to the steady, thermal disequilibrium states where a vapour at a temperature T^V is exposed to a solid surface at a lower temperature, T^S, …
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Impact of Langmuir isotherm on production behavior of CBM reservoirs
… type curves which predict the impact of Langmuir Isotherms on production behavior on a Coalbed Methane reservoir in order to evaluate the economic feasibility and to maximize potential recovery. In order to achieve this objective, the impact of Langmuir isotherm constant on production type curves …
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The Influence of Double Layer Structure on The Adsorption Isotherm of Palmitic Acid
Made available in DSpace on 2014-12-05T19:37:32Z (GMT). No. of bitstreams: 1 6003991.pdf: 4373232 bytes, checksum: ae29c38172ccdb65dccfab4e037f0fd4 (MD5) Previous issue date: 1960
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Adsorption of sulfate and phosphate at the mineral-water interface: isotherm, stoichiometry, and models
… 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 times greater than for kaolinite, indicating the difference in reactive site density …
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Investigating the glassy to rubbery transition of polydextrose and corn flakes using automatic water vapor sorption instruments, DSC, and texture analysis
… investigate the usefulness of automated sorption isotherm methods for determining the glassy to rubbery transition in a model amorphous food material, polydextrose. The automated sorption isotherms were obtained from 20 to 40°C at 5°C intervals using dynamic vapor sorption (DVS). The DVS ramping …
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Evaluation of economical sorbents for the removal of metolachlor from contaminated wastewater
… were best described by the Freundlich isotherm model. Metolachlor was preferentially sorbed in the following order: rubber > peat > wood fibers, with removal efficiencies of 80-85%, 70-80% and 50-65%, respectively. Differences in slopes of the isotherm lines and K values were negligible …
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Oceanic response observations due to passing tropical cyclones : an assessment of drag and sea spray parameterizations
… revealed a 40 m depression of the 26°C isotherm ahead of the device's closest point of approach with the storm and usual upwelling response. This unique finding motivated attempting to replicate the apparent downwelling ahead of Hurricane Ignacio and three others-Irma, Florence and …
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Development and Comparison of 17beta-Estradiol Sorption Isotherms for Three Agriculturally Productive Soils From Different Physiographic Regions in Virginia
… to reach equilibrium and to develop sorption isotherms for each soil. The time required to reach equilibrium for all soils was less than 24 hours. A linear isotherm provided the best fit to model the sorption of E2 to Cecil and Myatt soils (R2 = 0.94 and 0.96, respectively). For Groseclose …
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The purification of industrial wastewater to remove heavy metals and investigation into the use of zeolite as a remediation tool
… respectively. Both the Langmuir and Freundlich isotherm models were used to characterize the experimental data and to assess the adsorption behaviour of natural zeolite for copper, iron, lead and zinc. The experimental data were slightly better suited to the Langmuir isotherm than the …
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Adsorption of water vapor by selected containment aerosols : chlorides and cement dust
… AT AUTHOR'S REQUEST.] The macroscopic adsorption isotherms of water vapor on selected containment aerosols of a nuclear reactor such as cesium iodide, cesium chloride, potassium chloride, lithium chloride, and containment concrete dust were studied using a Cahn 2000 electrobalance. The equilibrium …
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Thermographic studies of tissue trauma and seating
… seating programme and the quantification of isotherm areas for statistical comparisons of skin temperature response to experimental parameters. The thermographic research is presented in three phases of analysis: Chapter 4, a retrospective study of thermograms based on maximum temperatures; …
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A study of lightning flashes attending periods of banded heavy snowfall
… the height of the -10 [degree sign]C isotherm for each of these lightning flashes was obtained from skew-T log-p analysis. This level is considered critical for charging processes in winter clouds, and its height has been shown to have a strong influence over the generation of winter …
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Evaluating Competitive Sorption Mechanisms of Volatile Organic Chemical Mixtures in Soils and Sediments Using Polymers and Zeolites
… mixtures. To test this hypothesis, aqueous isotherms and desorption kinetic profiles for trichloroethylene (TCE) and tetrachloroethylene (PCE), either alone or in a mixture, were measured at 30°C for three natural solids, two polymers, and four zeolites. The polymers and zeolites were …
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Synthesis and potential application of Fe3+/Mn2+ bimetal and hexadecyltrimethylammonium bromide (HDTMA-Br) modified clayey soils for arsenic removal in groundwater
… be optimum at pH between 6 and 8. The adsorption isotherm data for As(III) and As(V) removal by both clays fitted better to Freundlich isotherm. Adsorption of both species of arsenic onto the clay mineral occurred via electrostatic attraction and ion exchange mechanisms. Both clay soils could be …
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Characterization and kinetics study of activated coconut shells, cow bones and zeolite based adsorbent for pome treatment
… and Pb from the batch study were fitted to the isotherm and kinetic models. The result of the isotherm study fitted best to the Langmuir equation model for COD, NH3-N, Fe and Cd which indicated that the adsorption of the pollutants from the supernatant was favourable on a mono layer surface. The …
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Land Use Impacts of Plastic Mulch Tomato Production and Evaluation of Sorbent Control on Shellfish Hatchery Operations
… an ion exchange resin, Amberlite IRC-718. These isotherm studies showed that all sorbents removed soluble copper, and that increased salinity and a greater contact time were shown to increase sorption. Utilizing the Freundlich isotherm, the capacity of the eight sorbents studies ranged from 25 to …
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Adsorption of Single and Multi-Component Per-and Polyfluoroalkyl Substances (PFAS) at Air-Water Interfaces
… was better predicted by the Freundlich isotherm than the Langmuir isotherm. Varying pore-water velocity revealed that lower velocities increased retardation at lower PFOS concentrations due to the presence of diffusion-limited domains in quasi-saturated conditions. Additionally, PFAS in …
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Moisture redistribution in screeded concrete slabs
… is presented. In addition, sorption isotherms including scanning curves were determined in a sorption balance for materials used in the floor constructions, viz, w/c 0.65 concrete, w/c 0.4 concrete, w/c 0.55 cement mortar, and Floor 4310 Fibre Flow, a self leveling flooring compound. …
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Color Removal From Pulp Mill Effluent Using Coal Ash Produced From Georgia Power Coal Combustion Plants
… determine their effect on removal. Kinetic and isotherm studies were also conducted using the optimal conditions, and the data was fitted to existing adsorption models. In addition, a column study was completed to observe CFA in a continuous flow setting. The research produced a cost-effective …
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Partitioning Between Soil-Adsorbed and Planktonic Escherichia coli
… were analyzed using this method to develop an isotherm equation describing <I>E. coli</I> partitioning. The <I>E. coli</I> used to inoculate these samples was cultured using a chemostat reactor to control cell growth stage and control variability. A linear isotherm (R²=0.88) was selected to …
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