Author/Authors :
Tabatabaeian Khalil نويسنده , Fallah Shojaei Abdollah نويسنده Full Professor in Inorganic Chemistry at University of Guilan , Zebardast Mahshid نويسنده Khajeh Nasir University of Technology
Abstract :
In this study, the adsorption of Methylene Blue (MB) dye was studied with
modi ed Fe-MOF-5 and MOF-5 synthesized at room temperature by a direct mixing
approach. The morphological and physicochemical properties of the prepared catalysts
were characterized by Scanning Electron Microscopy (SEM), X-Ray Di raction (XRD),
and Fourier transform infrared spectroscopy (FT-IR). The removal rate of Fe-MOF-5 was
considerably greater than that of MOF-5, showing that the adsorption performance of
MOF-5 can improve through necessary modi cations. The in
uence of various parameters
on the adsorption interaction of the prepared compounds was considered in pH value,
contact time, temperature, adsorbent dosage, and concentration of MB. Consequently, the
adsorption kinetics, thermodynamics, and isotherms were explored consistently. To predict
the adsorption isotherms and specify the characteristic parameters for the process design,
four isotherm models, such as Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich
(D-R), were applied. The experimental isotherm data were found to t the Langmuir
model properly. Additionally, adsorption kinetic data were tested using pseudo- rst-order,
pseudo-second-order, and Elovich models and were found to t pseudo-second-order model.
The thermodynamic parameters illustrated that the adsorption was a spontaneous and
endothermic process
