Modified mesoporous clay adsorbent for adsorption isotherm and kinetics of methylene blue

Auta, M.; Hameed, B.H.

doi:10.1016/j.cej.2012.05.075

Cited by 289 publications

(104 citation statements)

References 49 publications

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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: 61%

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: 61%

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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“…This is due to its low surface area and cationic exchange capacity (Jiang et al, 2009). Recently, clay minerals can be modified in different ways to obtain specific chemical, surface, and structural properties for different applications by pretreatment with chemicals or combined treatment such as heating and chemical attacks (Adeyemo et al, 2015;Auta and Hameed, 2012;Gao et al, 2015;Ijagbemi et al, 2010;San Cristobal et al, 2009;Yavuz and Saka, 2013).…”

Section: Introductionmentioning

confidence: 99%

Improvement adsorption capacity of methylene blue onto modified Tamazert kaolin

Boukhemkhem

Rida

2017

Adsorption Science & Technology

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In this study, three adsorbents were prepared with the raw kaolin issued from the Tamazert region in Algeria (Tamazert kaolin (KT)), for the removal of basic dye methylene blue (MB) from aqueous solutions. The first absorbent, KT-1, was obtained by thermal treatment; the second, KT-2, was obtained by thermal followed by acid treatment; and the third, KT-3, was obtained by thermal followed by acid and alkaline treatments. These adsorbents were characterized by powder X ray diffraction, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller surface area, and scanning electron microscopy. Adsorption equilibrium isotherms of MB were correlated with common isotherm equations such as Langmuir and Freundlich models. The modified kaolins (KT-1, KT-2, and KT-3) showed different capacities of the equilibrium adsorption in comparison with raw kaolin (KT). The maximal adsorption capacity (111 mg g À1 ) was observed with modified kaolin (KT-3). The effect of operating parameters such as the initial dye concentration, contact time, adsorbent dose, pH, and temperature were studied onto KT-3. The removal of MB by adsorbent increased with an increase in adsorbent dose and initial concentration. Kinetics models, the pseudo-first-order, and pseudo-second-order rate equations were applied. The obtained results show that the adsorption of MB by KT-3 was well described by the pseudo-second-order kinetic model. The thermodynamic study revealed that the adsorption process was spontaneous, endothermic, and the positive value of ÁS indicated the affinity of MB molecules to the adsorbent surface. This study showed that this new adsorbent could be a good candidate for some activated carbons.

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“…The adsorbent dosage is an important parameter in the adsorption studies because it determines the capacity of the adsorbent for a given initial concentration of dye solution [11], [12]. The result from fig.…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 99%

Effect of Process Factors on the Adsorption of MB Dye Using Adenia Lobata Fiber

Patrick¹,

Ebere²,

C³

2014

IJIRSET

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ABSTRACT:This study was undertaken to investigate the adsorptive capacity of Adenia lobata fiber on MB dye. The experiments were carried out in a batch system to study the effects of adsorbent dosage, MB dye initial concentrations, P H , and contact time on the adsorptive capacity of the activated carbon fiber. The scanning electronic microscopy (SEM) revealed well pronounced porosity which indicated good possibility for the dye to be trapped and adsorbed. P H did not have much effect on the removal efficiency, the removal efficiency slightly increased as p H was increased from 2 to 10. The removal efficiency increased with the increase in dosage of the adsorbent while the adsorptive capacity decreased. The increase in initial concentration increased the adsorptive capacity but decreased the removal efficiency. The equilibrium adsorption data fitted well with intraparticle diffusion model but was not the only rate controlling step; boundary layer diffusion controls it to some extent. The thermodynamic parameters indicated the process as feasible and spontaneous. The process was endothermic at lower initial concentration and exothermic at higher initial concentration.

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Modified mesoporous clay adsorbent for adsorption isotherm and kinetics of methylene blue

Cited by 289 publications

References 49 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

Improvement adsorption capacity of methylene blue onto modified Tamazert kaolin

Effect of Process Factors on the Adsorption of MB Dye Using Adenia Lobata Fiber

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