Separation of gadolinium(III) and lanthanum(III) by nanofiltration-complexation in aqueous medium

Abstract

A new method is proposed for the separation of gadolinium(Ill) and lanthanum(III) in aqueous medium by nanofiltration combined with a complexation step. First DTPA was chosen as ligand for a selective Gd(IIl)/La(III) complexation. Having investigated the influence of three factors (pH, temperature and amount of ligand) for the selective complexation of DTPA towards Gd(IIl) and La(IlI), the system is then combined with a n anofiltration separation process to remove 92% of initial Gd(llI) and only 12% of initial La.

Adsorption of Gadolinium (Gd3+) Ions on the Dibenzo Crown Ether (DBCE) and Dicyclo Hexano Crown Ether (DCHCE) Grafted on the Polystyrene Surface: Insights from All Atom Molecular Dynamics Simulations and Experiments

“…Hence, Gd 3+ ions are imperative to be removed from wastewater streams . In the recent past, various methods have been proposed for the separation of Gd 3+ such as cloud point extraction, solvent exraction, nanofiltrations, solid–liquid extraction, − and column chromatography. , Among them, solvent extraction is a widely used method for the separation of metal ions . In this method, an extractant plays a vital role to extract a metal ion from an aqueous phase to an organic phase.…”

Rejection of Gd(III) by nanofiltration assisted by complexation on charged organic membrane: Influences of pH, pressure, flux, ionic strength and temperature

“…Thus the resulting complexes could be rejected by the membrane, whereas the non-complexed ions pass through it. It is this principle of nanofiltration assisted by complexation [4][5][6][7][8][9][10] which was applied throughout this study. This study deals with the rejection of Gd(III) by nanofiltration assisted by complexation on organic charged membranes using DTPA (diethylentriaminepentaacetic acid).…”

Solid–liquid Lanthanide Extraction With Ionic-Imprinted Polymers

“…With this purpose, different approaches were developed: selective precipitation, liquid -liquid extraction, nanofiltration -complexation, etc. [16,17] However, to overcome this challenge, it is necessary to develop methods that are as efficient as possible. Recently, we reported the preparation of ion-imprinted solids, which exhibited selectivity towards Gd (III) with respect to La (III) .…”