Extraction and separation feasibility of cerium (III) and lanthanum (III) from aqueous solution using modified graphite adsorbent

Abstract

Graphite (GR) and graphite/alginate (GRA) composite were synthesized utilizing the thermal annealing technique and used as a new adsorbent material for the selective separation and removal of La(III) and Ce(III) from aqueous solutions. Fourier transform infrared (FTIR) spectroscopy, thermal analysis (DTA, TGA), X-ray diffraction (XRD), surface area, porosity, and scanning electron microscope (SEM) were also used to characterize the generated material. Distinct experiments were performed to test the ability of the GRA to La(III) and Ce(III) removal, which include the effect of pH, shaken time, initial concentration of La(III), and Ce(III) at different temperatures range. After 20 min, both ions have reached equilibrium. The pseudo second-order kinetic model was chosen as one which best fits the experimental evidence and better reflects the chemical sorption process. Adsorption isotherm was studied using the Langmuir, Freundlich, and D-R models. The Langmuir model was used to better fit the results obtained. At 25 °C, Ce(III) and La(III) have maximum monolayer capacities of 200 and 83.3 mg/g, respectively. The sorption was endothermic reaction and spontaneous, as illustrated by the data of thermodynamics studies. GRA has the ability to be used as a novel lanthanide adsorbent material, especially for selective separation between Ce(III) and La(III).

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

“…On the other hand, the data reported by Abdollahi et al [287] are particularly interesting because the authors provided the results of modelling leading to conclusion about the leading role of electronegativity and molecular mass of LREEs during adsorption. La 3+ and Ce 3+ adsorption (capacity 86 and 200 mg g -1 ) and separation was studied on graphite and graphite/alginate composite [288]. The adsorption properties were discussed considering electronegativities, hydration energies and hydrated radii [288].…”

“…La 3+ and Ce 3+ adsorption (capacity 86 and 200 mg g -1 ) and separation was studied on graphite and graphite/alginate composite [288]. The adsorption properties were discussed considering electronegativities, hydration energies and hydrated radii [288].…”

Study on the efficient adsorption of selenium(III) by hydroxyapatite composite zeolite imidazolium framework-67

“…increasing concentration at the same temperature and also increase as the temperature rises at a constant concentration. It can be interpreted that, at a higher temperature, the molecular movement in the adsorption process is accelerated, so the time to reach adsorption equilibrium can be shortened [39] . To elucidate the adsorption mechanism, the Ce 3+ adsorption data were fitted with the Langmuir model (Equation ( 7)) and the Freundlich model (Equation ( 8)) at temperatures of 303, 313, and 323K.…”

Effect of Lanthanum Sorption on the Behavior of Rarely Crosslinked Acidic and Basic Polymer Hydrogels during Remote Interaction

“…Therefore, it is necessary to create a technology for obtaining a wide range of individual rare earth elements. For the concentration, separation, and purification of REM from impurities, various methods are used, including extraction and ion exchange [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ].…”