The adsorption of basic dye (Astrazon Blue FGRL) from aqueous solutions onto sepiolite, fly ash and apricot shell activated carbon: Kinetic and equilibrium studies

Karagözoğlu, Bünyamin; Taşdemi̇r, Münir; Demirbaş, E.; Kobya, Mehmet

doi:10.1016/j.jhazmat.2007.01.003

Cited by 159 publications

(81 citation statements)

References 38 publications

(32 reference statements)

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“…This is because of the fact that an increase in the concentration of dye solution results to produce the high mass gradient pressure between the dye solution and organoclay, this pressure gradient than acts as a driving force for the transfer of dye molecules into the particle surface of the organoclays. [48][49][50] The results also indicate that percent removal and adsorption capacity of …”

Section: Effect Of Initial Dye Concentrationmentioning

confidence: 69%

Adsorption Kinetics of Malachite Green and Methylene Blue from Aqueous Solutions Using Surfactant-modified Organoclays

Ullah

Nafees²,

Iqbal

et al. 2017

ACSi

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The main objective of this research is to study the adsorption behaviour of malachite green and methylene blue dyes onto the surfactant modified natural clays. The results of SEM, XRD, IR, and thermal analysis confirms the intercalation of organic moiety in to the clay. The adsorption results show that pseudo-first order kinetics best fitted for both the dyes adsorbed on organo-clay. The data also reveals that both dyes are in a good agreement with Langmuir isotherm in both types of modified clays. The value of separation factor, R L , from Langmuir equation and Freundlich constant, n, give an indication of favourable adsorption. The maximum adsorption capacity q m based on Langmuir model was found to be 294-303 mg/g at 25 °C, is in good agreement with the experimental values.

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Section: Effect Of Initial Dye Concentrationmentioning

confidence: 69%

Adsorption Kinetics of Malachite Green and Methylene Blue from Aqueous Solutions Using Surfactant-modified Organoclays

Ullah

Nafees²,

Iqbal

et al. 2017

ACSi

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“…Some of the most popular types of clay minerals (kaolinite, illite, montmorillonite, vermiculite, sepiolite, bentonite) have been tested to remove by adsorption a variety of organic pollutants such as dyes [182][183][184][185][186][187][188][189][190][191], pesticides [74,[192][193][194][195][196], PAHs [124,189,197], pharmaceuticals [74,75,157,[175][176][177], phenolic compounds [125,174,198] and other aromatics [124,174,189,198]. In the vast majority of these studies the organic substances are removed most commonly from pure water solutions in batch adsorption assays.…”

Section: Clay-based Materialsmentioning

confidence: 99%

“…The polarities and water solubilities of the pollutants, fly ash particle sizes and its unburned carbon content, as well as pH of the media are specified as the main factors with significant effect on the adsorption processes [184,[258][259][260][263][264][265][267][268][269]. Depending on the balance between the composition on metal oxides or the residual carbon content, adsorption of polar or mostly non-polar molecules, respectively, may be favored.…”

Section: Industrial and Agricultural Wastes And By-productsmentioning

confidence: 99%

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

Dordio

Carvalho

2013

Journal of Hazardous Materials

188

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“…on remarque que le temps d'équilibre est indépendant de la concentration et que la quantité adsorbée à l'équilibre augmente avec la concentration. on remarque également que la vitesse initiale d'adsorption augmente avec la concentration, ceci est dû au fait que la diffusion des molécules du colorant de la solution à la surface de l'adsorbant est accélérée par l'augmentation de la concentration en colorant (KaraGozoGLU et al, 2007).…”

Section: Effet De La Concentration Initiale En Colorantunclassified

“…La nature endothermique du processus est confirmée par la valeur positive de l'enthalpie libre (KaraGozoGLU et al, 2007;WenG et Pan, 2007). Les valeurs négatives de ΔG° (tableau 3) indiquent que l'adsorption du colorant bleu de méthylène sur l'argile brute et purifiée est spontanée (KaraGozoGLU et al, 2007;WenG et Pan, 2007). La valeur positive de ΔS montre l'affinité de l'adsorbant vis-à-vis du colorant (WenG et Pan, 2007).…”

Section: Paramètres Thermodynamiquesunclassified

Élimination du colorant basique « Bleu de Méthylène » en solution aqueuse par l’argile de Safi

Karim

Badia

Hachkar

et al. 2010

rseau

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Ce travail porte sur l’étude de l’adsorption du colorant bleu de méthylène, colorant cationique utilisé dans la teinture du coton, du bois et de la soie sur l’argile brute et purifiée de la région de Safi (Maroc). Les essais d’adsorption ont montré que l’équilibre s’établit au bout de 20 minutes. Différents paramètres expérimentaux ont été analysés : pH, masse d’adsorbant et concentration initiale en colorant. Les résultats expérimentaux ont montré que l’adsorption du colorant bleu de méthylène sur l’argile brute et purifiée dépend du pH de la solution et de la concentration initiale en colorant.La capacité d’adsorption a été déterminée en utilisant les isothermes de Langmuir et Freundlich. La capacité maximale d’adsorption de l’argile brute est de 50 mg•g-1, celle de l’argile purifiée est de 68,5 mg•g-1. La cinétique d’adsorption du bleu de méthylène a été étudiée en utilisant les équations du pseudo-premier-ordre et pseudo-second-ordre. L’adsorption du colorant bleu de méthylène sur l’argile brute et purifiée peut être décrite par une cinétique du pseudo-second-ordre. L’effet de la température sur l’adsorption du colorant a été également étudié et les paramètres thermodynamiques ont été déterminés.This study reports the adsorption of methylene blue dye, a cationic dye used in dyeing cotton, wood and silk, on the crude and purified clay from Safi (Morocco). The adsorption experiments demonstrated that adsorption equilibrium is established after 20 minutes. Various experimental parameters were analyzed: pH, adsorbent mass, initial dye concentration. The experimental results showed that adsorption of methylene blue onto crude and purified clay is related to the pH of the solution and the initial dye concentration.The adsorption capacity was determined using the Langmuir and Freundlich isotherms. The monolayer adsorption capacity for methylene blue dye is 50 mg per g of crude clay while the monolayer adsorption capacity on purified clay is 68,5 mg per g clay. The adsorption kinetics of methylene blue were studied using the equations of the pseudo-first-order and pseudo-second-order reactions. The kinetics of adsorption of methylene blue dye onto the crude and purified clay can be described by a pseudo-second-order model. The effect of temperature on the adsorption of the dye was also evaluated and the thermodynamic parameters were determined

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The adsorption of basic dye (Astrazon Blue FGRL) from aqueous solutions onto sepiolite, fly ash and apricot shell activated carbon: Kinetic and equilibrium studies

Cited by 159 publications

References 38 publications

Adsorption Kinetics of Malachite Green and Methylene Blue from Aqueous Solutions Using Surfactant-modified Organoclays

Adsorption Kinetics of Malachite Green and Methylene Blue from Aqueous Solutions Using Surfactant-modified Organoclays

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

Élimination du colorant basique « Bleu de Méthylène » en solution aqueuse par l’argile de Safi

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