A theoretical isotherm for adsorption on heterogeneous surface

Cerofolini, G. F.; Jaroniec, Mietek; Sokołosvski, S.

doi:10.1007/bf01405370

Cited by 26 publications

(7 citation statements)

References 14 publications

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“…Adsorption isotherms are important tools in elucidating the mechanism of surface (organo-electrochemical) reactions. Evaluation with an adsorption isotherm involves an evaluation of its ability to represent raw experimental data, or information derived from such data, after the parameters of the equation have been adjusted to optimize this representation and followed by an evaluation of the physical reasonableness of the optimizing parameters in terms of the physical model on which the equation of state is based [16][17][18][19]. Table 2.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Behaviour of [(4-Hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)- methyl]-urea on Stainless Steel in Phosphoric Media

James¹,

Ajanaku²,

Kehinde³

et al. 2009

Port. Electrochim. Acta

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The adsorption of [(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)methyl]-urea on iron in phosphoric media was studied by using electrochemical technique. The adsorption mechanism was investigated using adsorption isotherms. The experimental data fit localized adsorption models. The values for free energy of adsorption, o ads G ∆ , were also calculated at each surface coverage, θ, of the studied compound by applying the mathematical model of Bockris-Swinkels adsorption isotherm. The variation of free energy of adsorption o ads G ∆ with surface coverage, θ, was interpreted in terms of deviation from ideal condition assumed in Langmuir model. A possible adsorption model of HPU2 molecules on to the metal surface was suggested.

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Section: Resultsmentioning

confidence: 99%

Adsorption Behaviour of [(4-Hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)- methyl]-urea on Stainless Steel in Phosphoric Media

James¹,

Ajanaku²,

Kehinde³

et al. 2009

Port. Electrochim. Acta

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“…The Langmuir isotherm represents the equilibrium distribution of adsorbate molecules between the solid and liquid phases [24]. The squares of correlation coefficient (R 2 ) values ranged from 0.993 to 1 for the three studied temperatures viz.…”

Section: Langmuir Isothermmentioning

confidence: 99%

Kinetics and isotherm studies on the adsorption of hexavalent chromium onto phosphoric acid activated Mimusops elengi leaves carbon

Nandhakumar¹,

A²,

Chandramohan³

et al. 2017

Int. J. Curr. Res. Chem. Pharm. Sci

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Hexavalent chromium [(Cr (VI))] ion is toxic and therefore, its removal from wastewater is extremely important. This study re ports on the adsorption of Hexavalent Chromium from aqueous solutions using activated carbon prepared from leaves of Mimusops elengi by phosphoric acid activation. Adsorption experiments were carried out in a batch process with various experimental parameters such as effect of contact time, initial chromium ion concentration, carbon dosage and pH. Kinetics of the system was studied with linearised forms of Lagergren, Ho and Webber Morris models. Equilibrium data were fitted with Langmuir, Freundlich, Temkin and Dubinin-Raduskevich isotherms.

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“…The magnitude of 'n' reveals the favorability of the adsorption. The values of 0< 1/n< 1 represent favourable adsorption conditions [27]. …”

Section: Freundlich Isothermmentioning

confidence: 99%

Kinetics and isotherm studies on the adsorption of hexavalent chromium onto sulphuric acid activated Mimusops elengi leaves carbon

2017

Int. J. Curr. Res. Chem. Pharm. Sci

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Hexavalent chromium [(Cr (VI))] ion is toxic and voluntarily adsorbed by some adsorbents; then, its captivating away from wastewater is very important. This study reports on the adsorption of Hexavalent Chromium from aqueous solution using activat ed carbon prepared from leaves of Mimusops elengi by sulphuric acid activation. Adsorption experiments were approved out in a batch process with various experimental parameters such as effect of contact time; initial chromium ion concentration, carbon dosage and pH on percentage removal have been studied. Kinetics of the system was studied with linearised forms of Lagergren, Ho and Webber Morris models. Equilibrium data were fitted with Langmuir, Freundlich, Temkin and Dubinin-Raduskevich isotherms.

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A theoretical isotherm for adsorption on heterogeneous surface

Cited by 26 publications

References 14 publications

Adsorption Behaviour of [(4-Hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)- methyl]-urea on Stainless Steel in Phosphoric Media

Adsorption Behaviour of [(4-Hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-(4-methoxy-phenyl)- methyl]-urea on Stainless Steel in Phosphoric Media

Kinetics and isotherm studies on the adsorption of hexavalent chromium onto phosphoric acid activated Mimusops elengi leaves carbon

Kinetics and isotherm studies on the adsorption of hexavalent chromium onto sulphuric acid activated Mimusops elengi leaves carbon

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