Adsorptive removal of toxic metals and cationic dyes by magnetic adsorbent based on functionalized graphene oxide from water

Sahraei, Razieh; Hemmati, Khadijeh; Ghaemy, Mousa

doi:10.1039/c6ra12934j

Cited by 74 publications

(21 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, after modification, the Q m of amine‐functionalized reduced GO–carbon nanotube hybrid and nano‐graphite/Fe 3 O 4 composite increased to 333.33 and 151.52 mg/g, respectively, for the same dye . Similarly, CoFe 2 O 4 /rGO nanocomposite exhibited higher Q m (88.3 mg/g) for MG , it implies that modification procedure is one of the essential approaches to introduce more complex functional groups into GO to enhance the adsorption efficiency .…”

Section: Introductionmentioning

confidence: 99%

“…Researchers are, therefore, engaged in the development of efficient adsorbents with higher adsorption capacity and reusability for dye/metal ions removal that may provide better adsorption operations. GO, which has a layered two‐dimensional hexagonally arranged sp 2 bonded carbon atoms with honeycomb lattice, tunable band gap, and good electronic, thermal, and mechanical stability , has attracted an increasing attention for water treatment attributed mainly to it being harmless and low cost solid material containing many ionizable functional groups for instance OH and COOH groups, which can replace ions with positively charged pollutants . These functional groups improve GO sheets dispersion in polar solvents, and form a homogeneous colloidal suspension .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Khan¹,

Shahjahan²,

Khan

2018

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Adsorptive removal of cationic dyes such as methyl violet (MV) and methyl green (MG) from aqueous solution using magnetic iron‐manganese oxide coated graphene oxide (IMGO) was examined. The IMGO was characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive X‐ray spectroscopy, X‐ray diffraction (XRD), N2 adsorption–desorption isotherm, and vibrating sample magnetometer. The effect of different process parameters such as contact time, IMGO dose, initial dyes concentration, initial solutions pH, and temperature was investigated. The equilibrium experimental data were fitted with Langmuir, Freundlich, Dubinin–Radushkevich (D‐R), and Temkin isotherm models. The data fitted well with Freundlich isotherm model suggesting multilayer adsorption of dyes onto heterogeneous adsorbent surface. The Langmuir adsorption capacity (Qm, mg/g) of IMGO with MV and MG was 172.96 and 195.64, respectively. The data obeyed the pseudo‐second order kinetic model, and the mechanism of adsorption was controlled by both intra‐particle and liquid film diffusion models. The adsorption process was found to be spontaneous, endothermic, and physical in nature. The dye‐loaded IMGO was regenerated and used for at least four cycles without any substantial loss of its efficacy. The present adsorptive removal studies of MV and MG revealed that IMGO is an effective and efficient adsorbent for the removal of basic dyes from aquatic system. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S214–S229, 2019

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Khan¹,

Shahjahan²,

Khan

2018

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…The study of adsorption kinetics is necessary for wastewater treatment using adsorbents since it provides highly valuable information on reaction pathways and the mechanisms controlling the adsorption process, such as chemical reaction, mass transfer and diffusion, 29 which is helpful in designing an effective and fast model for the adsorption of colored pollutants. Hence, five common kinetic models were employed to fit the kinetic adsorption data of AY17 dye onto CS/CoFe 2 O 4 by the non-linear method using Mathematica 9.0 software, that is, the Lagergren pseudo-first order, 30 pseudo-second order, 31 intraparticle diffusion, 32 simplified Elovich, 33 and fractional power 34 models.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

CoFe2O4/CHITOSAN MAGNETIC NANOCOMPOSITE: SYNTHESIS, CHARACTERIZATION AND APPLICATION FOR ADSORPTION OF ACIDIC YELLOW DYE FROM AQUEOUS SOLUTIONS

ANSARI¹,

Miralinaghi²,

AZIZINEZHAD³

2019

Cellulose Chem. Technol.

View full text Add to dashboard Cite

Magnetic chitosan-modified CoFe 2 O 4 nanoparticles, CS/CoFe 2 O 4 , were successfully synthesized by an in situ coprecipitation technique. The structure, crystal phase, surface morphology and magnetic properties of CS/CoFe 2 O 4 were characterized by FTIR, TGA, XRD, FE-SEM, EDX and VSM analyses. The as-prepared CS/CoFe 2 O 4 nanoparticles were employed to adsorb Acid Yellow 17 dye (AY17) from aqueous solutions. The influence of experimental parameters, such as pH, temperature, contact time, adsorbent dosage and initial dye concentration on the efficiency of AY17 adsorption was studied. The maximum dye removal percentage reached 90% after 90 min adsorption at pH 4.0 and 323 K for the solution with an initial AY17 concentration of 30 mg L-1 and CS/CoFe 2 O 4 dose of 0.01 g. The adsorption kinetics agreed well with the pseudo-second order model. The isothermal data preferably followed the Langmuir model, with the maximum adsorption capacity of 89.10 mg g-1. Thermodynamic studies illustrated that the adsorption process is endothermic and spontaneous.

show abstract

“…The adsorption obeyed the Langmuir isotherm model. Magnetic adsorbents based on functionalized graphene oxide were developed and utilized for removing crystal violet and MB by Sahraei et al 21 The adsorption results obeyed the Langmuir isotherm. The maximum adsorption capacities were 416.06 and 440.97 mg/g for MB and crystal violet, respectively.…”

Section: Introductionmentioning

confidence: 99%

Removal of five cationic dyes using a resin coated with nickel/nickel boride nanoparticles

Çinar¹,

Coşkun²,

Çiftçi³

2018

Turk J Chem

View full text Add to dashboard Cite

Resins coated with nickel/nickel boride nanoparticles were used to remove brilliant green, methyl violet, methylene blue, phenosafranine, and brilliant cresyl blue from water. The effects of pH, adsorbent dose, contact time, and initial dye concentration on the adsorption efficiencies were investigated. The point of zero charge for the adsorbent was pH 9.5. Isotherm studies were conducted using Langmuir, Freundlich, and Dubinin-Radushkevich models, and thermodynamic studies were also performed. Adsorption of the five dyes was found to obey the Langmuir isotherm model and was endothermic. The maximum adsorption capacities calculated from the Langmuir isotherm were 66.7, 88.5, 144.9, 56.2, and 147.1 mg/g for methylene blue, brilliant cresyl blue, methyl violet, phenosafranine, and brilliant green, respectively. E values obtained from the Dubinin-Radushkevich isotherm showed that the adsorption mechanism was chemical in nature. Furthermore, three kinetic models (pseudo first-order, pseudo second-order, and intraparticle) were investigated. The pseudo second-order kinetic model fit the five cationic dyes best.

show abstract

Adsorptive removal of toxic metals and cationic dyes by magnetic adsorbent based on functionalized graphene oxide from water

Abstract: Adsorption of heavy metal ions and cationic dyes from aqueous solutions by superparamagnetic GO-based polymeric nanocomposite.

Cited by 74 publications

References 59 publications

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

Synthesis of magnetic iron‐manganese oxide coated graphene oxide and its application for adsorptive removal of basic dyes from aqueous solution: Isotherm, kinetics, and thermodynamic studies

CoFe2O4/CHITOSAN MAGNETIC NANOCOMPOSITE: SYNTHESIS, CHARACTERIZATION AND APPLICATION FOR ADSORPTION OF ACIDIC YELLOW DYE FROM AQUEOUS SOLUTIONS

Removal of five cationic dyes using a resin coated with nickel/nickel boride nanoparticles

Contact Info

Product

Resources

About