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Adsorption isotherms-microscopic modelling
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1977Abstract A lattice formalism using “spin variables” is employed to analyse multi-state models for the adsorption of neutral dipoles. In particular, a spin-1/2 (two-state) model incorporating permanent and induced dipole moments of the solvent and the organic adsorbate, substrate interactions, and discreteness of charge effects is analysed.
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General purpose adsorption isotherms
Environmental Science & Technology, 1986The fitting of adsorption isotherm equations to experimental data is often an important aspect of data analysis. If the Langmuir and Freundlich isotherms are used, then consideration must be given to the proper weighting of the observations. Preferably nonlinear regression (nonlinear least squares) should be used since this enables these isotherms to ...
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This experiment aimed to study the adsorption isotherm of dissolved substances by understanding the factors influencing adsorption, types of adsorption, and the application of adsorption isotherm equations such as Langmuir, Freundlich, and BET. The method used involved preparing a series of oxalic acid (H₂C₂O₄) solutions with different concentrations ...
Gissa Herdina +5 more
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Gissa Herdina +5 more
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Freundlich's adsorption isotherm
Surface Science, 1973Abstract We present a brief derivation of Freundlich's adsorption isotherm using straightforeward methods of statistical mechanics. The assumption that the adsorbed atoms move in Morse potential wells of different depths leads to the observed compensation effect in the energy dependence of the occupation probability of surface sites, essential for ...
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Monomolecular adsorption isotherms
Journal of Colloid and Interface Science, 1980There is a mathematical similarity between Jovanovich and Langmuir isotherms. They can be derived from integration of the differential equation. (dθ/dp) = c(1 − θ)k, when k = 1 and k = 2, respectively. Other isotherms which satisfy certain theoretical conditions of monomolecular adsorption may also be derived from the differential equation when k is ⩾1.
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This study investigates the adsorption behavior of a specific solute (e.g., a heavy metal ion or an organic dye) from an aqueous solution onto a novel adsorbent material (e.g., activated carbon, biochar, or a composite). The main objective is to determine the equilibrium relationship between the solute concentration in the bulk solution and the amount ...
Raysha Hanifah +4 more
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Raysha Hanifah +4 more
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Proceedings of the Indian Academy of Sciences - Section A, 1951
A new adsorption equation,viz.,\(a = \frac{{\rm A}}{{1 + \alpha \cdot e^{ - k^c } }}\) has been derived for those cases of adsorption where the previously adsorbed molecules facilitate the adsorption of more molecules striking the surface of the adsorbent.
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A new adsorption equation,viz.,\(a = \frac{{\rm A}}{{1 + \alpha \cdot e^{ - k^c } }}\) has been derived for those cases of adsorption where the previously adsorbed molecules facilitate the adsorption of more molecules striking the surface of the adsorbent.
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Isotherm models for adsorption of heavy metals from water - A review
Chemosphere, 2022Yiu Fai Tsang +2 more
exaly
Adsorption isotherm models: A comprehensive and systematic review (2010−2020)
Science of the Total Environment, 2022Mika Sillanpää, Vahab Ghalandari
exaly
Adsorption isotherm models: Classification, physical meaning, application and solving method
Chemosphere, 2020Jianlong Wang, Xuan Guo
exaly