Adsorption of 18-crown-6 from aqueous solution on granular activated carbon: A kinetic modeling study

Azizian, Saeid; Yahyaei, Bahareh

doi:10.1016/j.jcis.2006.01.058

Cited by 51 publications

(22 citation statements)

References 25 publications

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“…Therefore, the adsorption kinetics of RB5 onto chitosan 10 B is followed by a pseudo second-order model. This result is in agreement with reported experimental data for the adsorption of 18-crown-6 from aqueous solution on a granular activated carbon [44]. Moreover, the experimental adsorption kinetic profiles (Figs.…”

Section: Rate Constant Studiessupporting

confidence: 92%

Adsorption Characteristics of Reactive Black 5 from Aqueous Solution onto Chitosan

Saha

Bhoumik

Karmaker

et al. 2011

CLEAN Soil Air Water

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Adsorption of reactive black 5 (RB5) from aqueous solution onto chitosan was investigated in a batch system. The effects of solution pH, initial dye concentration, and temperature were studied. Adsorption data obtained from different batch experiments were modeled using both pseudo first-and second-order kinetic equations. The equilibrium adsorption data were fitted to the Freundlich, Tempkin, and Langmuir isotherms over a dye concentration range of 45-100 mmol/L. The best results were achieved with the pseudo second-order kinetic and Langmuir isotherm equilibrium models, respectively. The equilibrium adsorption capacity (q e ) was increased with increasing the initial dye concentration and solution temperature, and decreasing solution pH. The chitosan flakes for the adsorption of the dye was regenerated efficiently through the alkaline solution and was then reused for dye removal. The activation energy (E a ) of sorption kinetics was estimated to be 13.88 kJ/mol. Thermodynamic parameters such as changes in free energy (DG), enthalpy (DH), and entropy (DS) were evaluated by applying the van't Hoff equation. The thermodynamics of reactive dye adsorption by chitosan indicates its spontaneous and endothermic nature.

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Section: Rate Constant Studiessupporting

confidence: 92%

Adsorption Characteristics of Reactive Black 5 from Aqueous Solution onto Chitosan

Saha

Bhoumik

Karmaker

et al. 2011

CLEAN Soil Air Water

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“…Sorption kinetics are usually modeled with pseudo-first order or pseudo-second order equations (Ho and McKay, 1998;Wu et al, 2001;Reddad et al, 2002;Azizian and Yahyaei, 2006).…”

Section: Sorptionmentioning

confidence: 99%

Investigation of MCHM transport mechanisms and fate: Implications for coal beneficiation

Noble

Ziemkiewicz

2015

Chemosphere

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“…This model assumes that the differences between the average solid phase concentration at time t (min), q t (mg/g), and the equilibrium concentration, q e (mg/g), are the driving force for adsorption and the overall adsorption rate is proportional to the square of the driving force, which can be written as [23] …”

Section: Pseudo-second-order Modelmentioning

confidence: 99%

Kinetics and thermodynamics of sorption of nitroaromatic compounds to as-grown and oxidized multiwalled carbon nanotubes

Shen

Shan

Dong

et al. 2009

Journal of Colloid and Interface Science

152

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The sorption kinetics and thermodynamics of 1,3-dinitrobenzene (DNB), m-nitrotoluene (mNT), p-nitrophenol (pNP), and nitrobenzene (NB) on as-grown and nitric acid-oxidized multiwalled carbon nanotubes (MWCNTs) were investigated. The sorption kinetics was well described by a pseudo-second-order rate model, while both Langmuir and Freundlich models described the sorption isotherms well and the sorption thermodynamic parameters of equilibrium constant (K 0 ), standard free energy ( G), standard enthalpy ( H), and standard entropy changes ( S) were measured. The values of H and G suggested that the sorption of nitroaromatics (NACs) onto MWCNTs was exothermic and spontaneous. The structure, number, and position of nitro groups of NACs were the main factors affecting the sorption rate and capacity. Treatment of the MWCNTs with nitric acid increased both the surface area and the pore volume and introduced oxygen-containing functional groups to the MWCNTs, which depressed the sorption of NACs onto MWCNTs.

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Adsorption of 18-crown-6 from aqueous solution on granular activated carbon: A kinetic modeling study

Cited by 51 publications

References 25 publications

Adsorption Characteristics of Reactive Black 5 from Aqueous Solution onto Chitosan

Adsorption Characteristics of Reactive Black 5 from Aqueous Solution onto Chitosan

Investigation of MCHM transport mechanisms and fate: Implications for coal beneficiation

Kinetics and thermodynamics of sorption of nitroaromatic compounds to as-grown and oxidized multiwalled carbon nanotubes

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