Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Zamani, S.; Tabrizi, Nooshin Salman

doi:10.1007/s11164-014-1868-2

Cited by 52 publications

(21 citation statements)

References 46 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the chemical structure of MB has rich aromatic rings and cationic atoms, which are favorable for adsorbing on the surface of VACFF through π–π stacking and ionic interaction (Liu et al., 2012a). Similar conclusions were drawn that the adsorption of MB on the graphene adsorbents is mainly due to both electrostatic interaction and π–π stacking interaction (Li et al., 2013; Zamani and Tabrizi, 2014).…”

Section: Resultssupporting

confidence: 81%

“…Based on q e values and R 2 , the pseudo-second-order kinetic model was chosen as more appropriate for the kinetic modelling of MB adsorbed by the two adsorbents. The pseudo-second-order model assumes that two reactions are occurring in the adsorption process, the first one is fast and reaches equilibrium quickly, and the second is a slower reaction that can continue for long time periods (Zamani and Tabrizi, 2014). Besides, the much larger k 2 values also confirmed the much faster adsorption rate of VACFF-1600 than VACFF-1300.…”

Section: Resultsmentioning

confidence: 99%

“…The Freundlich isotherm is an empirical equation based on an exponential distribution of adsorption sites and energies. It is expressed as where q e is the adsorption capacity at equilibrium (mg/g), C e is the equilibrium concentration of MB (mg/L) and k F [(mg/g)/(L/mg) n ] and n are Freundlich constants related to adsorption capacity and adsorption intensity, respectively, with k F representing the relative adsorption capacity of the adsorbent and n representing the degree of dependence of adsorption on the C e of MB (Zamani and Tabrizi, 2014).…”

Section: Methodsmentioning

confidence: 99%

“…The Langmuir isotherm assumes a surface with homogeneous binding sites, equivalent sorption energies and no interaction between adsorbed species. It is expressed as where q e is the adsorption capacity at equilibrium (mg/g), C e is the equilibrium concentration of MB (mg/L) and q max (mg/g) and k L (L/mg) are Langmuir constants related to adsorption capacity and rate of adsorption, respectively, with q max representing the maximum monolayer coverage of adsorbent with adsorbate and k L representing the enthalpy of the adsorption (Zamani and Tabrizi, 2014).…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Adsorption of methylene blue from aqueous solution onto viscose-based activated carbon fiber felts: Kinetics and equilibrium studies

Liu

Zhou

Wang

et al. 2019

Adsorption Science & Technology

View full text Add to dashboard Cite

Two viscose-based activated carbon fiber felts (VACFF-1300 and VACFF-1600) with different specific surface areas and pore structures were prepared via two-step carbonization and steam activation and characterized by SEM observation, N2 adsorption/desorption isotherms, Fourier-transform infrared, X-ray diffraction and X-ray photoelectron spectroscopy analysis. They were used as adsorbents for the removal of methylene blue dye from aqueous solution, and the adsorption equilibrium and kinetics were studied via batch adsorption experiments and the adsorption mechanisms were investigated. Results showed that the equilibrium data for methylene blue adsorption onto VACFF-1300 and VACFF-1600 fitted well to the Langmuir isotherm model, with maximum monolayer adsorption capacity of 256.1 mg/g and 325.8 mg/g, respectively. Besides, the adsorption kinetics study showed that the adsorption of methylene blue onto the two VACFF samples could be best described by the pseudo second-order model. Moreover, the intraparticle diffusion modelling showed that intraparticle diffusion is rate-controlling for both VACFF-1300 and VACFF-1600, and external diffusion is also a rate-controlling step for the latter.

show abstract

Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption of methylene blue from aqueous solution onto viscose-based activated carbon fiber felts: Kinetics and equilibrium studies

Liu

Zhou

Wang

et al. 2019

Adsorption Science & Technology

View full text Add to dashboard Cite

show abstract

“…If (1/ n ) < 1, the adsorption conforms to the normal Langmuir isotherm model. If (1/ n ) > 1, collaborative adsorption occurs [ 25 ].…”

Section: Adsorbing Mechanism Analysis Of Cs/go Aerogelmentioning

confidence: 99%

Preparation of Chitosan—Graphene Oxide Composite Aerogel by Hydrothermal Method and Its Adsorption Property of Methyl Orange

et al. 2020

View full text Add to dashboard Cite

Graphene based aerogel has become one of the most likely functional adsorption materials that is applicable to purify various contaminated water sources, such as dye wastewater, because of its high porosity, structural stability, large specific surface area, and high adsorption capacity. In this study, chitosan and graphene oxide were first selected as the matrix to prepare the composite hydrogel through the hydrothermal method, which was further frozen and dried to obtain the target aerogel. The microscopic structures and adsorption capacity of the composite aerogel were then characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and N2 (nitrogen) physical adsorption and desorption tests. The results show that the specific surface area of the composite aerogel was reached at 297.431 m2/g, which is higher than that of graphene oxide aerogel and chitosan aerogel. The aperture was reduced to about 3 nm. The adsorption rate of the composite aerogel for the methyl orange solution was as high as 97.2% at pH = 1, and the adsorption capacity was 48.6 mg/g. The adsorption process of the composite aerogel satisfies the Langmuir equation and can be described by the second-order adsorption kinetics. In addition, it is worth noting that this composite aerogel can provide a striking adsorption characteristic on methyl orange due to the combining effects from massive amino groups on chitosan and the structural conjugation of graphene oxide.

show abstract

Effect of acid catalysts on amorphous graphene oxide aerogel production

Kariper,

Mercan

et al. 2024

Materialwissenschaft Werkst

View full text Add to dashboard Cite

The acids utilized in the production of graphene oxide aerogel underwent testing, revealing variations from the ones documented in the literature. The powder samples were produced by drying under ambient conditions. They were characterized, and the effect of the graphene oxide aerogels produced using these different acids on sound insulation was investigated. All reaction steps were the same in the study, except that different acids were added in the same molar amounts. Measurements were performed at 200 Hz–6000 Hz frequencies for sound absorption. Samples for sound absorption were prepared in 0.1 mm thickness. According to the results, the aerogel produced with acetic acid provided the best sound insulation at approximately 2000 Hz. We also attempted to explain how these acids affect sound insulation.

show abstract

Removal of methylene blue from water by graphene oxide aerogel: thermodynamic, kinetic, and equilibrium modeling

Cited by 52 publications

References 46 publications

Adsorption of methylene blue from aqueous solution onto viscose-based activated carbon fiber felts: Kinetics and equilibrium studies

Adsorption of methylene blue from aqueous solution onto viscose-based activated carbon fiber felts: Kinetics and equilibrium studies

Preparation of Chitosan—Graphene Oxide Composite Aerogel by Hydrothermal Method and Its Adsorption Property of Methyl Orange

Effect of acid catalysts on amorphous graphene oxide aerogel production

Contact Info

Product

Resources

About