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A modified Langmuir-Freundlich isotherm model for simulating pH-dependent adsorption effects
Journal of Contaminant Hydrology, 2012Analytical isotherm equations such as Langmuir and Freundlich isotherms are widely used for modeling adsorption data. However, these isotherms are primarily useful for simulating data collected at a fixed pH value and cannot be easily adapted to simulate pH-dependent adsorption effects. Therefore, most adsorption studies currently use numerical surface-
Gautham P, Jeppu, T Prabhakar, Clement
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Physical Chemistry Chemical Physics, 2022
The rate constants and equilibrium constant for the adsorption and desorption of lipid vesicles from a SiO2 surface have been determined.
Iad Alhallak, Peter J. N. Kett
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The rate constants and equilibrium constant for the adsorption and desorption of lipid vesicles from a SiO2 surface have been determined.
Iad Alhallak, Peter J. N. Kett
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Modeling Gas Adsorption in Marcellus Shale With Langmuir and BET Isotherms
SPE Journal, 2016SummaryProduction from shale-gas reservoirs plays an important role in natural-gas supply in the United States. Horizontal drilling and multistage hydraulic fracturing are the two key enabling technologies for the economic development of these shale-gas reservoirs.
Wei Yu +2 more
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Dual Langmuir Kinetic Model for Adsorption in Carbon Molecular Sieve Materials
Langmuir, 2000A model of adsorption in carbon molecular sieve materials (CMS) is presented in this paper. Adsorption kinetics is modeled as a series of two consecutive processes: nonselective adsorption of molecules in meso-supermicropores followed by the movement of such adsorbed molecules into small micropores through the pore mouth barriers.
Nguyen, C., Do, D. D.
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Gaseous slip models based on the Langmuir adsorption isotherm
Physics of Fluids, 2004On the basis of Langmuir’s theory of adsorption of gases on solids, a robust gaseous slip model is presented. The concept of accommodation coefficient and the difference of gas particles are explained within the new framework. It turned out that the Langmuir model recovers the Maxwell model in the first-order approximation in the case of the ...
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Comments on practical use of Langmuir gas adsorption isotherm model
Adsorption, 2016The physical and thermodynamic characteristics of the Langmuir adsorption isotherm model for pure gas and gas mixtures as well as the constraints on the saturation adsorption capacity of the gases by this model are discussed. Arbitrary violation of these constraints, viz.
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An extended Langmuir model for adsorption of gas mixtures on heterogeneous surfaces
Langmuir, 1990A model is presented for calculating the adsorption from gas mixtures on energetically heterogeneous adsorbents. It assumes a uniform distribution of adsorption energies and the applicability of the extended Langmuir model for adsorption from gas mixtures on each patch of surface of uniform energy.
A. Kapoor, J. A. Ritter, Ralph T. Yang
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Journal of Radioanalytical and Nuclear Chemistry, 2014
Adsorption property of granulated Prussian blue adsorbent on radioactive cesium was evaluated for efficient decontamination in Fukushima area. The adsorbent was found to show an inflective adsorption isotherm, which was expressed by extended Langmuir formula with three adsorption sites.
Hiroshi Ogawa +3 more
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Adsorption property of granulated Prussian blue adsorbent on radioactive cesium was evaluated for efficient decontamination in Fukushima area. The adsorbent was found to show an inflective adsorption isotherm, which was expressed by extended Langmuir formula with three adsorption sites.
Hiroshi Ogawa +3 more
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Freundlich and Langmuir Isotherms as Models for the Adsorption of Toxicants on Activated Charcoal
Journal of Pharmaceutical Sciences, 1987The Langmuir isotherm has been widely used to characterize the adsorption of solutes from aqueous solutions. Activated charcoal adsorption data obtained experimentally, using a wide range of adsorbate concentrations, fit the Langmuir isotherm poorly but evidence a good fit to the Freundlich isotherm. Statistical analysis reveals this to be also true of
P K, Gessner, M M, Hasan
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Environmental Science & Technology, 2015
Predictive models for linear sorption of solutes onto various media, e.g., soil organic carbon, are well-established; however, methods for predicting parameters for nonlinear isotherm models, e.g., Freundlich and Langmuir models, are not. Predicting nonlinear partition coefficients is complicated by the number of model parameters to fit n isotherms (e ...
Craig Warren, Davis, Dominic M, Di Toro
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Predictive models for linear sorption of solutes onto various media, e.g., soil organic carbon, are well-established; however, methods for predicting parameters for nonlinear isotherm models, e.g., Freundlich and Langmuir models, are not. Predicting nonlinear partition coefficients is complicated by the number of model parameters to fit n isotherms (e ...
Craig Warren, Davis, Dominic M, Di Toro
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