Effective removal of Ce(III) and Pb(II) by new hybrid nano-material: HnPMo12O40@Fe(III)xSn(II)ySn(IV)1−x−y

Yousefi, Taher; Yavarpour, Shahnaz; Mousavi, Seyed Hamed; Torab‐Mostaedi, Meisam; Davarkhah, Reza; Mobtaker, Hassan Ghasemi

doi:10.1016/j.psep.2015.07.011

Cited by 23 publications

(6 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where k 2 represents the rate constant of the pseudo-second-order adsorption process (g/mg•min); Q e , Q t are the adsorption capacity at equilibrium and, respectively, the amount of CR/MO retained on the adsorbent at time t (mg/g). Equation (8), presented in 1962 by Weber and Morris [33], is used to express the kinetic model of intraparticle diffusion:…”

Section: The Mathematical Modeling Of Adsorption Processmentioning

confidence: 99%

See 1 more Smart Citation

Comparative Study of CoFe2O4 Nanoparticles and CoFe2O4-Chitosan Composite for Congo Red and Methyl Orange Removal by Adsorption

et al. 2021

View full text Add to dashboard Cite

(1) Background: A comparative research study to remove Congo Red (CR) and Methyl Orange (MO) from single and binary solutions by adsorption onto cobalt ferrite (CoFe2O4) and cobalt ferrite–chitosan composite (CoFe2O4-Chit) prepared by a simple coprecipitation method has been performed. (2) Methods: Structural, textural, morphology, and magnetic properties of the obtained magnetic materials were examined by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, N2 adsorption–desorption analysis, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and magnetic measurements. The optimal operating conditions of the CR and MO removal processes were established in batch experiments. The mathematical models used to describe the processes at equilibrium were Freundlich and Langmuir adsorption isotherms. (3) Results: Cobalt ferrite–chitosan composite has a lower specific surface area (SBET) and consequently a lower adsorption capacity than cobalt ferrite. CoFe2O4 and CoFe2O4–Chit particles exhibited a superparamagnetic behavior which enabled their efficient magnetic separation after the adsorption process. The research indicates that CR and MO adsorption onto prepared magnetic materials takes place as monolayer onto a homogeneous surface. According to Langmuir isotherm model that best fits the experimental data, the maximum CR/MO adsorption capacity is 162.68/94.46 mg/g for CoFe2O4 and 15.60/66.18 mg/g for CoFe2O4–Chit in single solutions. The results of the kinetics study revealed that in single-component solutions, both pseudo-first-order and pseudo-second-order kinetics models represent well the adsorption process of CR/MO on both magnetic adsorbents. In binary solutions, adsorption of CR/MO on CoFe2O4 better follows the pseudo-second-order kinetics model, while the kinetic of CR/MO adsorption on CoFe2O4–Chit is similar to that of the dyes in single-component solutions. Acetone and ethanol were successfully used as desorbing agents. (4) Conclusions: Our study revealed that CoFe2O4 and CoFe2O4–Chit particles are good candidates for dye-contaminated wastewater remediation.

show abstract

Section: The Mathematical Modeling Of Adsorption Processmentioning

confidence: 99%

“…where k i is intraparticle diffusion rate constant (mg/g•min 0.5 ) and C (mg/g) defines intersection that provides indications regarding the thickness of the diffusion layer [33].…”

Section: The Mathematical Modeling Of Adsorption Processmentioning

confidence: 99%

Comparative Study of CoFe2O4 Nanoparticles and CoFe2O4-Chitosan Composite for Congo Red and Methyl Orange Removal by Adsorption

et al. 2021

View full text Add to dashboard Cite

show abstract

“…According to the pseudo-rst-order model, the rate of adsorption on sorbent is proportional to the number of free active sites of sorbent. 48 Lagergren eqn (5) is the mathematical expression of pseudo-rst-order kinetic model:…”

Section: Pb(ii) Adsorption Studiesmentioning

confidence: 99%

Schiff base-functionalized mesoporous silicas (MCM-41, HMS) as Pb(ii) adsorbents

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The Sr(II) and Cs(I) so lu tions with differ ent con cen tra tions were uti lized for the ad sorp tion iso therm in ves ti ga tion. A valid model for monolayer ad sorp tion on a sur face with a fi nite num ber of iden tical sites, is Langmuir model, which can be ex pressed as [35,36]…”

Section: )mentioning

confidence: 99%

Anchoring of CoHFC nanoparticles on clinoptilolite for remedy of nuclear wastes

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

Effective removal of Ce(III) and Pb(II) by new hybrid nano-material: HnPMo12O40@Fe(III)xSn(II)ySn(IV)1−x−y

Cited by 23 publications

References 20 publications

Comparative Study of CoFe2O4 Nanoparticles and CoFe2O4-Chitosan Composite for Congo Red and Methyl Orange Removal by Adsorption

Comparative Study of CoFe2O4 Nanoparticles and CoFe2O4-Chitosan Composite for Congo Red and Methyl Orange Removal by Adsorption

Schiff base-functionalized mesoporous silicas (MCM-41, HMS) as Pb(ii) adsorbents

Anchoring of CoHFC nanoparticles on clinoptilolite for remedy of nuclear wastes

Contact Info

Product

Resources

About