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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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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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Adsorption isotherms—A critique
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1973Summary The possibility or the impossibility of separating the particle and the electrode interactions is discussed in a wider context of the effects due to any two interaction potentials on the equation of state. The involved nature of the pressure dependence on two individually definable forces is illustrated through the Percus Yevick results for ...
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Adsorption isotherms on fractal substrata
Physical Review A, 1989Au moyen de simulations de Monte Carlo, on etudie les reactions de recombinaison limitee par diffusion et suivies de la desorption et de l'adsorption de particules isolees a partir de substrats fractals et multifractals. A partir des resultats on admet: a) l'adsorption dissociative et la desorption associative de molecules diatomiques et b) l ...
, Albano, , Mártin
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Adsorption isotherms and thermal fluctuations
Physical Review B, 1996The influence of thermal fluctuations on adsorption isotherms is calculated within the context of a selfconsistent mean-field theory, and it is found that such fluctuations cannot be neglected in the analysis of adsorption data. This result arises from our observation that substrate-induced hindrance of thermal fluctuations can significantly alter the ...
, Mecke, , Krim
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Quantitative Characterization of Adsorption Isotherms Using Isothermal Microcalorimetry
Journal of Pharmaceutical Sciences, 1996The integral heat of adsorption of water vapor on sodium benzoate samples was determined at various partial vapor pressures using a heat conduction microcalorimeter. An equation is presented to describe the calorimetric integral heat response (mJ/g of solid) as a function of relative humidity.
M, Pudipeddi +3 more
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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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The adsorption isotherm and thermodynamics of adsorption equilibrium
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19691. Four previously proposed methods of calculating the differential entropies and heats of adsorption on the basis of one adsorption isotherm were compared, and their possibilities and limits of applicability were discussed. 2. A new thermodynamic method of approximate calculation of the differential heats and entropies of adsorption ...
B. P. Bering, V. V. Serpinskii
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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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