Results 291 to 300 of about 83,849 (312)

Some consideration on the Langmuir isotherm equation

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2006
Abstract The Langmuir isotherm equation has been widely used in adsorption process for decades. This note analyzed application constrain of the Langmuir isotherm equation. In a strict theoretical sense, the concentration of adsorbate used in the Langmuir isotherm equation must be expressed as its molar concentration.
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Langmuir Isotherms of Quenched and Annealed Polyelectrolyte Brushes

Langmuir, 2000
We report here Langmuir isotherms of diblock copolymers containing a short neutral hydrophobic sequence (polystyrene) and a long water-soluble polyelectrolyte sequence (polyvinyl-2-pyridine). This study focuses on the polyelectrolyte sequence, which is a weak polyelectrolyte when unmodified and strong polyelectrolyte when quaternized.
C. Prinz, P. Muller, M. Maaloum
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The Napa Soil; Langmuir Isotherm Adsorption Equation

2020
Napa soil is natural material that is used by West Sumatra people as medicine of stomachache and diarrhea. Napa soil highly contains SiO2 and Al2O3, the presentation is SiO2 63.20 % and Al2O3 16.55%. Thus, napa soil can be used as alternative material as source of silica and it is hoped that it can be used as potential inorganic m aterial as adsorbent,
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Quantitative analysis of compression isotherms of fullerene C60 Langmuir layers

Colloid Journal, 2008
The structure of fullerence C60 Langmuir layers formed from a solution in cyclohexane has been determined from their compression isotherms. The layer structure, in particular, the size of formed aggregates, has been shown to depend on the initial surface concentration of fullerene. A quantitative model of the Langmuir layer has been proposed.
L. A. VALKOVA, A. S. GLIBIN, VALLI, Ludovico   +2 more
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Supercritical fluid simulated moving bed chromatography II. Langmuir isotherm.

Journal of chromatography. A, 2001
The simulated moving bed (SMB) technology offers the possibility of scaling up single column, batch chromatographic separations to continuous operation. This has proved particularly effective for the separation of enantiomers, and has been applied in the liquid and gas phase, as well as using a supercritical fluid as eluent (SF-SMB).
O. D. Giovanni, MAZZOTTI, MARCO GIUSEPPE, MORBIDELLI, MASSIMO, F. Denet, W. Hauck, R. M. Nicoud   +5 more
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Characterization of Molecularly Imprinted Polymers with the Langmuir−Freundlich Isotherm

Analytical Chemistry, 2001
The majority of binding models that have been applied to molecularly imprinted polymers (MIPs) have been homogeneous models. MIPs, on the other hand, are heterogeneous materials containing binding sites with a wide array of binding affinities and selectivities.
R J, Umpleby, S C, Baxter, Y, Chen, R N, Shah, K D, Shimizu   +4 more
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LIX.On Langmuir's adsorption isotherm

The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 1931
(1931). LIX. On Langmuir's adsorption isotherm. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science: Vol. 11, No. 71, pp. 690-696.
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Determination of thermodynamic parameters from Langmuir isotherm constant-revisited

Journal of Molecular Liquids, 2017
Abstract An analytical approach for estimation of the thermodynamic parameters from the Langmuir isotherm constant has been introduced in the present paper. The concept of the thermodynamic equilibrium constant for the Langmuir isotherm based adsorption process was critically analysed.
Partha S. Ghosal, Ashok K. Gupta
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Natural Organic Matter Sorption by Kaolinite: Modified Langmuir Isotherm

Journal of Environmental Engineering, 1997
This technical note describes the use of the modified Langmuir isotherm (MLI) model recently introduced by Gu and coworkers to describe the adsorption and desorption of natural organic matter (NOM) onto Kaolinite. The MLI was able to describe the adsorption of two different NOM samples with the use of three adjustable parameters.
Shalini Jayasundera, Alba Torrents
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On the derivation of the Langmuir adsorption isotherms

Kolloid-Zeitschrift & Zeitschrift für Polymere, 1965
An intermediate relation obtained byJellinek in his derivation of theLangmuir adsorption isotherm equation is found to be equivalent tode Witte's extension ofJ. J. Thomson's adsorption theorem. To transform this relation into theLangmuir equationJellinek assumes the quantity\(b' = \frac{{RT}}{b}e^{\frac{{ - \Delta W_\alpha }}{{RT}}} \), to be a ...
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