A new isotherm for multilayer gas adsorption on heterogeneous solid surfaces

Bashiri, Hadis; Orouji, Samaneh

doi:10.1007/s00214-014-1594-2

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…The Freundlich model had ( R 2 ) values for Cd(II), IBU, and MB by PPH as (0.995, 0.992, 0.990), CPH (0.991, 0.990, 0.990) and NPH (0.998, 0.997 and 0.998). This indicated that sorption had occurred on heterogeneous surfaces with the formation of multilayer adsorption when the concentration of the pollutants was increased [ [64] , [65] , [66] ]. According to Siddiqui and Chaudhry [ 67 ], the value of the Freundlich constant ( n ) between 0 and 10 indicates that the sorption of pollutants was favorable.…”

Section: Resultsmentioning

confidence: 99%

Application of carbon from pomegranate husk for the removal of ibuprofen, cadmium and methylene blue from water

Shooto

2023

Heliyon

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Section: Resultsmentioning

confidence: 99%

Application of carbon from pomegranate husk for the removal of ibuprofen, cadmium and methylene blue from water

Shooto

2023

Heliyon

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“…But, the simple BET equation gives a good agreement with experimental data only at relative pressures lower than 0.35 of adsorbate. A great number of researchers have been analyzed this worrying fact, and numerous modifications have been proposed to the BET model to amend this problem [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Approach to Multilayer Sorption: Equations of Isotherm and Applications

Pantuso¹,

Castro²,

Larregain³

et al. 2019

Food Engineering

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An analytical isotherm equation that describes the multilayer adsorption on fractal surfaces with adsorbate-adsorbate interactions (measured in terms of free energy) different from that of bulk liquid was developed. Assuming mathematical functionalities for the variation of the free energy, it is possible to evaluate the influence of the adsorbate-adsorbate interactions on the adsorption capacity of solids of high degree of surface irregularity. For those surfaces with relatively low degree of irregularity, it results that the free energy variation with the layer number in the multilayer region affects considerably the sorption capacity of the adsorbent, even for water activities lower than those corresponding to the monolayer moisture content. The energy interactions between adjacent adsorbate layers become less important as the fractal dimension of the adsorbent increases. For a fractal surface, the growing of the multilayer seems to mainly controlled by the degree of surface roughness characteristic of microporous adsorbents, where the volume and pore dimension are the true limitants to the sorption capacity. The isotherm equations obtained were tested fitting published experimental equilibrium data of various water vapor-biopolymer systems.

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“…Some of the famous isotherms for adsorption are Langmuir (Langmuir, 1918), Freundlich (Freundlich, 1909), Sips (or Langmuir-Freundlich) (Sips, 1950), Tempkin (Tempkin and Pyzhev, 1940), Toth (Toth, 1971) and Frumkin (Frumkin, 1925). Recently, we provided a new isotherm for multilayer gas adsorption on heterogeneous solid surface (Bashiri and Orouji, 2015).…”

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confidence: 99%