Assessing the Sorptive Ability of Synthesized Graphene Oxide‐Metal Oxide Composite to Remove Certain Lanthanides

Abstract

A metal oxide decorated graphene oxide composite (GO-MO) is prepared via fixation of manganese dioxide (MnO 2) on the surface of graphene oxide (GO). The composite is used as a sorbent for the separation of europium and cerium ions from aqueous solutions. The synthesized materials are characterized using scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy. The role of different variables on the sorptive ability of these materials is studied. Two simplified kinetic models, pseudo-first order and pseudo-second order, are applied to describe the kinetics of the sorption process. It is found that sorption of Eu(III) and Ce(III) ions on the synthesized sorbents could be described more favorably by the pseudo-second-order kinetic model. Sorption data are analyzed with Freundlich and Langmuir isotherm models. Desorption of europium and cerium ions from loaded sorbents is carried out using different eluents. Eu(III) ions are easily desorbed from loaded samples using 0.01 m EDTA while Ce(III) ions are easily eluted using 0.01 m AlCl 3. The obtained data clarify that the synthesized composite could be considered as a promising candidate for preconcentration and separation of some lanthanide elements from aqueous solutions.

Performance of molybdenum vanadate loaded on bentonite for retention of cesium-134 from aqueous solutions

“…Figure 5 (c) shows a great reduction in the E% of Cs(I) ions with increasing molar concentration of NaCl from 0.02 to 0.2 M. The E% of Cs(I) ions decreased from 82.69% to 51.15% with rising NaCl concentration up to 0.2 M. This reduction could be referred to as the presence of Na(I) retarded the movement of Cs(I) ions from bulk solution towards the surface of the MoV@bentonite composite. Ion exchange or outer-sphere surface complexation is primarily responsible for the strong ionic strength-dependent sorption (Sheha et al 2020 ).…”

Linear and Non Linear Recognition for the Sorption of 60Co and 152+154Eu Radionuclides onto Bio CuO Nanocomposite

“…Hence, 60 Co (II) and 152+154 Eu (III) find it was difficult to be detached from the adsorbent. However, HCl had the ability to cover loaded P 4 AACMA/CuO nanocomposite surface with [H + ] and hence, 60 Co (II) and 152+154 Eu (III) detached easily [44]. However, EDTA had higher desorption efficiency than HCl due to the strong complexation of EDTA.…”

“…4. A small broad peak was observed at 3480 cm − 1 assigned to the O-H group stretching vibration for hydrogen bonding of physically adsorbed water or moisture content [44]. Furthermore, the band was observed at 1630 cm − 1 assigned to the bending vibration of O-H group combined with copper atoms [45].…”

On membrane-based approaches for rare earths separation and extraction – Recent developments

“…29). MnO2/GO composite [275] was utilized for adsorption of Ce 3+ and Eu 3+ (with adsorption capacity 102 and 103 mg g -1 , respectively). Hua et al [276] proposed the application of carbon nanospheres combined with PAN via electrospinning to obtain La 3+ adsorbing membrane.…”