Results 191 to 200 of about 42,396 (235)

ON THE BASIS FOR THE FREUNDLICH ADSORPTION ISOTHERM

Chemical Engineering Communications, 1990
Abstract The theoretical underpinnings of the Freundlich adsorption isotherm, an often useful empiricism, are discussed. It is shown that the Freundlich expression does not originate from a true exponential distribution of energies of adsorption for the adsorption sites.
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A modified Langmuir-Freundlich isotherm model for simulating pH-dependent adsorption effects

Journal of Contaminant Hydrology, 2012
Analytical 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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Modeling adsorption in multicomponent systems using a Freundlich-type isotherm

Journal of Contaminant Hydrology, 1993
Abstract The suitability of a Freundlich-type isotherm, the Sheindorf-Rebuhn-Sheintuch (SRS) equation, to represent the competitive adsorption of Sr, Cs and Co in Ca-montmorillonite suspensions was investigated. Experimental adsorption data were obtained for systems containing these cations as single-component, binary and ternary mixtures.
Melida Gutierrez, Hector R. Fuentes
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Prediction of individual Freundlich isotherms from binary and ternary phenolic compounds mixtures

Chemosphere, 2008
Method for simultaneous determination of individual component's adsorption equilibrium parameters for binary and ternary phenolic compounds mixtures was investigated in this research. The Freundlich equilibrium parameters of binary and ternary component of phenolic compounds were determined from one fixed composition of phenolic wastewater.
Huan-Jung, Fan, Hsin-Sin, Yang, Yung-Sen, Tsai, Eiji, Furuya   +3 more
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D-optimal experimental designs for Freundlich and Langmuir adsorption isotherms

Chemometrics and Intelligent Laboratory Systems, 2009
In this paper, D-optimal experimental designs are derived for three common adsorption isotherm models: the 2-parameter Freundlich, the 2-parameter Langmuir, and the 3-parameter Langmuir. For each of these liquid-solid adsorption models, the D-optimal design equations are derived from the information matrix and then solved numerically to determine the ...
Aravind Mannarswamy, Stuart H. Munson-McGee, Robert Steiner, Paul K. Andersen   +3 more
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THE USE OF THE FREUNDLICH ISOTHERM FOR SOIL PHOSPHATE SORPTION DATA

Journal of Soil Science, 1975
Summary Phosphate sorption data for twenty‐nine soils were found to fit the Freundlich adsorption isotherm better if a measure of native labile P was first added to the sorption data, and this sum plotted against intensity. The exponent from the isotherm thus obtained was closely related to exchangeable A1 (in acid soils) and ...
A. H. FITTER, C. D. SUTTON
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Extension of a Jovanovic–Freundlich isotherm model to multicomponent adsorption on heterogeneous surfaces

Journal of Chromatography A, 1998
A recently proposed Jovanovic-Freundlich isotherm model for single component adsorption without lateral interactions on heterogeneous surfaces is extended to account for lateral interactions and for competitive adsorption. The model is tested using previously reported single component and competitive adsorption data of 2-phenylethanol and 3 ...
I, Quiñones, G, Guiochon
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Non-linear adsorption in fixed beds: the Freundlich isotherm

Chemical Engineering Science, 1973
Abstract Solutions have been obtained relating the breakthrough curve to bed parameters for the case of adsorption in fixed beds where the adsorption isotherm is of the non-linear Freundlich type and where the overall rate of adsorption is controlled by the rate of mass transfer across the gas-film surrounding each particle.
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General purpose Freundlich isotherms for cadmium, copper and zinc in soils

European Journal of Soil Science, 1999
Summary Assessing the accumulation and transport of trace metals in soils and the associated toxicological risks on a national scale requires generally applicable sorption equations. Therefore Freundlich equations were derived for Cd, Zn and Cu using multiple linear regression on batch sorption data from the ...
E. J. Elzinga, J. J. M. Van Grinsven, F. A. Swartjes   +2 more
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Determination of the originally adsorbed soil phosphorus by modified Freundlich isotherm

Communications in Soil Science and Plant Analysis, 1995
Abstract Phosphorus adsorption was studied on four different Hungarian soil samples previously treated with phosphorus. Six different isotherm models were fitted to the P adsorption data. All the models took into account the amount of phosphate originally adsorbed (Q).
L. Tolner, Gy. Füleky
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