Adsorption behavior of methylene blue onto titanate nanotubes

Xiong, Lin; Yang, Ye; Mai, Jiaxing; Sun, Weiling; Zhang, Chaoying; Wei, Dapeng; Chen, Qing; Ni, Jinren

doi:10.1016/j.cej.2009.10.023

Cited by 347 publications

(159 citation statements)

References 43 publications

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“…The value n gives an indication of the favourability of the adsorption process. When the value of n is less than 1 the adsorption is said to be unfavourable, but if it is greater than 1 it is favorable (Xiong et al 2010). The value of n obtained in this study is greater than 1 which indicates that the adsorption process is favorable.…”

Section: Effect Of Mass Of Biomassmentioning

confidence: 75%

Adsorptive removal of cationic dye from aqueous solution using chemically modified African Border Tree (<i>Newbouldia laevis</i>) bark

Ajaelu¹,

Nwosu²,

Ibironke³

et al. 2018

Journal of Applied Sciences and Environmental Management

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This study investigated the biosorption efficiency of sodium hydroxide modified African Border tree (SMABT) bark powder on Safranin O, a cationic dye. The SMABT was characterized by Fourier Transform Infrared Spectroscopy (FTIR). As the initial dye concentration increased, the amount of Safranin O removed increased. The kinetic studies were described by pseudo first order and pseudo second order. The pseudo second order fitted very well into the kinetic experimental data. Freundlich, Langmuir, Temkin and Dubinin-Radushkevich (D-R) models were employed to describe the adsorption of Safranin O to SMABT and also to evaluate the isotherm constants. Langmuir model was the best of the four to excellently fit into the experimental data. The maximum uptake capacity of SMABT for Safranin O dye was 90.9 mg/g.

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Section: Effect Of Mass Of Biomassmentioning

confidence: 75%

Adsorptive removal of cationic dye from aqueous solution using chemically modified African Border Tree (<i>Newbouldia laevis</i>) bark

Ajaelu¹,

Nwosu²,

Ibironke³

et al. 2018

Journal of Applied Sciences and Environmental Management

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“…The mechanism of adsorption is generally considered to involve three steps, one or any combination of which can be the rate-controlling mechanism: mass transfer across the external boundary layer fi lm of liquid surrounding the outside of the particle; adsorption at a site on the surface (internal or external) and the energy will depend on the binding process (physical or chemical); this step is often assumed to be extremely rapid; diffusion of the adsorbate molecules to an adsorption site either by a pore diffusion process through the liquid fi lled pores or by a solid surface diffusion mechanism 40 . The Lagergren's pseudo-fi rst order (Eq.…”

Section: Kinetic Studies Of Adsorptionmentioning

confidence: 99%

Modeling of experimental data for the adsorption of methyl orange from aqueous solution using a low cost activated carbon prepared from Prosopis juliflora

Kumar

Tamilarasan

2013

Polish Journal of Chemical Technology

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This paper presents the feasibility for the removal of methyl orange (MO) dye from aqueous solution using an activated carbon prepared from Prosopis julifl ora bark. Batch adsorption experiments were carried out as a function of pH, contact time, adsorbate concentration, adsorbent dosage and temperature. The commonly applicable isotherms namely Freundlich and Langmuir equations are used for the prediction of isotherm parameters. A comparison of linear least-square method and a trial-and-error non-linear method are examined in Freundlich and Langmuir (Four forms) isotherms. The nature of adsorption isotherm feasibility was evaluated with dimensionless separation factors (R L ). The dynamics of adsorption process was analyzed with Lagergren's Pseudo-fi rst order and Pseudo-second order kinetic equations. Thermodynamic parameters like the change in enthalpy (∆H o ), change in entropy (∆S o ) and change in Gibbs free energy (∆G o ) were evaluated and ΔG o shows a negative value whereas ΔH o shows the positive value indicating that the adsorption process was spontaneous and endothermic in nature. The functional group characterization of the adsorbent was done using Fourier transform infrared spectroscopy (FTIR). The thermal stability of activated carbon was analyzed using Thermo gravimetric analysis (TGA) and Differential thermal analysis (DTA).

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“…In addition, the low RL values (<0.04) implied that the interaction of methylene blue molecules with TNTs might be relatively strong (Xiong et al, 2010). In our experiment, the value of RL was 0.016.…”

Section: Methylene Blue Adsorption On Tntsmentioning

confidence: 61%

Titanate Nanotubes Produced From Microwave-Assisted Hydrothermal Synthesis: Characterization, Adsorption and Photocatalytic Activity

Manique

Silva

Alves

et al. 2017

Braz. J. Chem. Eng.

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-A microwave-assisted hydrothermal (MAH) method was employed to synthesize TiO2 nanotubes (TNTs) and these were compared to the conventional hydrothermal (CH) method. The nanotubes were characterized for their crystallinity, morphology, surface area and photocatalytic activity. The TiO2 P25 was used for comparison purposes and efficiently degraded both dyes. However, methylene blue was adsorbed on the nanotube surfaces, which can be attributed to the electrostatic interaction between the cationic methylene blue and the negatively charged TNT surface. On the other hand, all nanotubes had a photocatalytic performance with methyl orange (anionic dye). Additional degradation was observed for nanotubes synthesized via the MAH method at 150 °C. This can be directly related to their larger surface area. Adsorption mechanisms of TNTs were also discussed by applying the Langmuir and Freundlich isotherm. The results show an efficient dye wastewater treatment through the application of TNT photocatalyst.

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Adsorption behavior of methylene blue onto titanate nanotubes

Cited by 347 publications

References 43 publications

Adsorptive removal of cationic dye from aqueous solution using chemically modified African Border Tree (<i>Newbouldia laevis</i>) bark

Adsorptive removal of cationic dye from aqueous solution using chemically modified African Border Tree (<i>Newbouldia laevis</i>) bark

Modeling of experimental data for the adsorption of methyl orange from aqueous solution using a low cost activated carbon prepared from Prosopis juliflora

Titanate Nanotubes Produced From Microwave-Assisted Hydrothermal Synthesis: Characterization, Adsorption and Photocatalytic Activity

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