Equilibrium and kinetic studies of methyl orange adsorption on multiwalled carbon nanotubes

Yao, Yunjin; He, Bing; Xu, Fang; Chen, Xiaofeng

doi:10.1016/j.cej.2011.03.031

Cited by 428 publications

(123 citation statements)

References 34 publications

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“…They investigated adsorption kinetics, adsorption capacity of the adsorbent, and the effects of adsorption dosage and solution pH values on removal efficiency of those cationic dyes [18]. Yao et al also investigated the effect of temperature on the equilibrium adsorption of methylene blue and methyl orange from aqueous solution using carbon nanotubes [19][20][21]. Ghaedi et al reported the removal of Alizarin red S and morin from wastewater using a multiwalled carbon nanotube [22].…”

Section: Introductionmentioning

confidence: 99%

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Wang

et al. 2012

Chemical Engineering Journal

197

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h i g h l i g h t s" Adsorption of methylene blue and acid red 183 on a MWCNT in single and binary dye systems was investigated. " MWCNT shows higher adsorption capacity to methylene blue in both systems. " A synergistic effect for basic and acid dyes occurs in a binary dye system. t r a c tA multiwalled carbon nanotube (MWCNT) was used as an adsorbent for removal of a cationic dye (methylene blue, MB) and acid dye (acid red 183, AR183) from aqueous solution in single and binary dye systems. Characterization of the MWCNT and MWCNT-dye systems were performed using several techniques such as Fourier transform infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis (TG-DTA), zeta potential and elemental analysis. Adsorption tests showed that the MWCNT presented higher adsorption of MB than AR183 in single and binary dye systems, revealing that p-p stacking is the main driving force responsible for the dye-MWCNT interaction. In single dye systems, the MWCNT presented the maximum adsorption capacities of MB and AR183 at 59.7 and 45.2 mg/g, respectively. In a binary dye system, a synergistic effect due to electronic attraction between MB and AR183 was found at low AR183 concentration (10 mg/L), which promotes the adsorption of both dyes on the MWCNT. However, MB adsorption could be reduced at higher AR183 concentration (>20 mg/L) due to a strong electrostatic attraction between MWCNT-AR183.

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Section: Introductionmentioning

confidence: 99%

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Wang

et al. 2012

Chemical Engineering Journal

197

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“…The fast adsorption at the initial stage was probably due to the great concentration gradient between the dye in solution and the dye in the AC-WF-I because there must be a number of vacant sites available at the beginning. The progressive increase in adsorption and, consequently, the attainment of equilibrium adsorption are initially due to the limited mass transfer of the dye molecules from the bulk solution to the external surface of the adsorbent and are subsequently due to the slower internal mass transfer within the adsorbent particles [11,12]. As seen in Fig.…”

Section: Preliminary Adsorption Studies Of Pc-wfmentioning

confidence: 87%

“…After that, the activating agent-impregnated carbonized materials were activated at different temperature for certain activation time to prepare ACs. The other technique is the one-step process, the activating reagent was dissolved in water and mixed with the precursor, and then the heat treatment (carbonization) was carried out in a flow of nitrogen at 500°C [11,12].…”

Section: Orthogonal Experimentsmentioning

confidence: 99%

The Comparison Of Different Activation Techniques To Prepare Activated Carbon Materials From Waste Cotton Fabric

Shuahua

Meixia

et al. 2017

Autex Research Journal

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In this paper, we investigate on the preparation of waste cotton fabric-based activated carbons by different methods. Two different kinds of carbon materials are prepared from waste cotton fabric, the structure and properties were characterized using instrumental analyses such as scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). It is revealed that the products prepared using one-step process are composed of macroporous carbon network , which looks like sponge-type morphology, and exhibit the high values of qiodine(1,198 mg/g) and qmb(235.6 ml/g), showing their potential usage as adsorbent.

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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%

“…4b). The higher initial concentration of MB provided an additional driving force to overcome the mass transfer resistance for MB transfer between the solution and the surface of the adsorbent [12], [14].…”

Section: Effect Of Initial Dye Concentrationmentioning

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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Equilibrium and kinetic studies of methyl orange adsorption on multiwalled carbon nanotubes

Cited by 428 publications

References 34 publications

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes

The Comparison Of Different Activation Techniques To Prepare Activated Carbon Materials From Waste Cotton Fabric

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

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