Adsorption and kinetic study of Reactive Red 2 dye onto graphene oxides and graphene quantum dots

Luz‐Asunción, Miguel de la; Pérez‐Ramírez, Eduardo E.; Martínez-Hernández, Ana Laura; García-Casillas, Perla E.; Luna-Bárcenas, J. Gabriel; Velasco‐Santos, Carlos

doi:10.1016/j.diamond.2020.108002

Cited by 35 publications

(17 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the heterogeneous diffusion process controlled by the reaction rate and diffusion factor, including a series of reaction mechanisms such as the diffusion of solutes at the liquid phase or interface, surface activation, and deactivation, was described by the Elovich model; the results are shown in Figure S6 and Table S3 . The α values of the Elovich model were much higher than the β values, indicating that the adsorption rate was much higher than the desorption rate [ 38 ]. In addition, the R 2 values of the Elovich model were higher than those of both the pseudo-first- and pseudo-second-order models, suggesting that the Elovich model best represents the experimental kinetic data.…”

Section: Resultsmentioning

confidence: 99%

“…The adsorption kinetic models applied in this study were the pseudo-first-order model (Equation (1)), pseudo-second-order model (Equation (2)) [ 6 ], and the Elovich model (Equation (3)) [ 38 ].

where q t (mg/g) is the adsorption capacity at adsorption time t, k 1 (min −1 ) and k 2 (min −1 ) are the rate constants of the pseudo-first-order and pseudo-second-order models, respectively, α is the initial adsorption rate (mg/g·min −1 ), and β is the desorption constant (g/mg)…”

Section: Methodsmentioning

confidence: 99%

Section: Adsorption Kinetic and Interparticle Diffusion Studymentioning

confidence: 99%

See 2 more Smart Citations

Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

et al. 2021

View full text Add to dashboard Cite

Fe3O4@C nanoparticles were prepared by an in situ, solid-phase reaction, without any precursor, using FeSO4, FeS2, and PVP K30 as raw materials. The nanoparticles were utilized to decolorize high concentrations methylene blue (MB). The results indicated that the maximum adsorption capacity of the Fe3O4@C nanoparticles was 18.52 mg/g, and that the adsorption process was exothermic. Additionally, by employing H2O2 as the initiator of a Fenton-like reaction, the removal efficiency of 100 mg/L MB reached ~99% with Fe3O4@C nanoparticles, while that of MB was only ~34% using pure Fe3O4 nanoparticles. The mechanism of H2O2 activated on the Fe3O4@C nanoparticles and the possible degradation pathways of MB are discussed. The Fe3O4@C nanoparticles retained high catalytic activity after five usage cycles. This work describes a facile method for producing Fe3O4@C nanoparticles with excellent catalytic reactivity, and therefore, represents a promising approach for the industrial production of Fe3O4@C nanoparticles for the treatment of high concentrations of dyes in wastewater.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Finding that the best fit was to the Elovich model (Eq. ( 3)) with correlation coefficients of 0.997-0.998, indicating that the adsorption process presents feasibility because the α values are greater than the β values (Table 3), which represents that the adsorption rate is greater than the desorption [65].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Obtention of biochar-Fe/Ce using Punica granatum with high adsorption of ampicillin capacity

Gómez-Vilchis

García-Rosales

Longoria-Gándara

et al. 2022

Heliyon

View full text Add to dashboard Cite

This research presents the obtaining of a biochar (CB) from the use of pomegranate peel (Punica granatum) conditioned with iron and cerium nanoparticles (C-Fe/Ce), as well as its characterization by SEM (Scanning Electronic Microscopy), FTIR (Fourier Transform Infrared Spectrometry), TGA (Thermogravimetric analysis), EDS (Energy Dispersive Spectroscopy), XPS (X-Ray Photoelectron Spectroscopy) and evaluation of the adsorption capacity of ampicillin (AMP) in aqueous phase at 20, 30 and 40 C. The maximum adsorption capacity for CB was 18.97 mg g À1 and for C-Fe/Ce, 27.61 mg g À1 at pH of 7, observing that with increasing temperature, the sorption capacity decreases in both materials, the experimental data was fitted to various mathematical models and the best fit was the pseudo-second order model for the kinetics, whilst for the adsorption isotherms the best fit was with the Langmuir model, indicating that the adsorption process is carried out in a monolayer on a homogeneous surface, through a chemisorption process. According to the thermodynamic parameters this process is carried out through an exothermic reaction. The results obtained indicate that both materials are suitable for the removal of AMP in the aqueous phase and that they can be reused up to 5 times.

show abstract

“… 7 Approximately 10% of organic dyes containing aromatic groups and azo groups (–N N–) have been discharged into natural water. 8 The mass discharge of these azo dyes represents a great threat for aquatic organisms and ecological environments since most of azo dyes are highly toxic, carcinogenic and teratogenetic. 9 A large number of methods, such as ozonation, biological treatment, ionic exchange, photocatalysis, oxidative process and adsorption have been developed for the removal of organic dyes from water.…”

Section: Introductionmentioning

confidence: 99%

Turning waste into wealth: facile and green synthesis of carbon nanodots from pollutants and applications to bioimaging

et al. 2021

View full text Add to dashboard Cite

show abstract

Adsorption and kinetic study of Reactive Red 2 dye onto graphene oxides and graphene quantum dots

Cited by 35 publications

References 56 publications

Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

Fe3O4@C Nanoparticles Synthesized by In Situ Solid-Phase Method for Removal of Methylene Blue

Obtention of biochar-Fe/Ce using Punica granatum with high adsorption of ampicillin capacity

Turning waste into wealth: facile and green synthesis of carbon nanodots from pollutants and applications to bioimaging

Contact Info

Product

Resources

About