Lanthanum(III) and gadolinium(III) separation by cloud point extraction

Jong, Niels De; Draye, Micheline; Favre‐Réguillon, Alain; Lebuzit, Gérard; Cote, Gérard; Foos, J.

doi:10.1016/j.jcis.2005.07.004

Cited by 44 publications

(29 citation statements)

References 25 publications

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“…Such concentrates are usually processed by rather elaborate solvent extraction methods and ionic exchange. [44][45][46][47][48][49][50] However, it should be mentioned that lanthanide ions separation is far from trivial, since the elements exhibit very similar chemical properties, and the only possibility of success relies on the exploitation of the so called lanthanide contraction accompanying the increase of the atomic number. Such radial contraction determines the relative trends of the stability constants of the complexes, allowing some discrimination between the elements, which can be employed for separation purposes.…”

Section: Introductionmentioning

confidence: 99%

Green Processing of Strategic Elements Based on Magnetic Nanohydrometallurgy

Condomitti¹,

Almeida²,

Silveira³

et al. 2018

J. Braz. Chem. Soc.

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Magnetic nanohydrometallurgy (NHM) is a new process based on engineered superparamagnetic nanoparticles capable of performing as complexing agents for extracting and recovering strategic metals from mineral sources and urban wastes, as well as for removing hazardous elements from contaminated water. Its principles and application are reviewed in this paper. Typical examples involving copper, silver and mercury processing are here discussed, including the exploitation of a novel nanotechnological strategy for capturing and fractionating rare earth elements.

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Section: Introductionmentioning

confidence: 99%

Green Processing of Strategic Elements Based on Magnetic Nanohydrometallurgy

Condomitti¹,

Almeida²,

Silveira³

et al. 2018

J. Braz. Chem. Soc.

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“…Recently, 8-quinolinol derivatives have been applied to the extraction of rare-earth ions, and some interesting results have been reported in a conventional organic solvent system [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Rare-Earth Ions with an 8-Hydroxyquinoline Derivative in an Ionic Liquid

Yang

Kubota

Kamiya

et al. 2013

SERDJ

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The extraction behavior of rare-earth ions with an 8-hydroxyquinoline derivative, HO8Q (5-octyloxymethyl-8-quinolinol), was studied using an ionic liquid,(1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), as the extracting phase. Compared with a conventional organic solvent, n-dodecane, the ionic liquid system showed a higher extraction ability for a heavy rare earth, Dy, and a better selectivity between Dy and Nd (separation factor β Dy/Nd : 108). In the liquid-liquid extraction system, the color of the extracting phase changed from colorless to light yellow along with the extraction of rare-earth ions. Furthermore, the extraction efficiency was enhanced by the addition of TOPO (tri-n-octylphosphine oxide) as a co-extractant.

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“…11 Cloud point extraction (CPE) has been investigated for matrix separation and pre-concentration of different elements, 12,13 including the lanthanides. 14,15 The CPE method is based on micelles production by surfactant and subsequent separation 16 in aqueous solutions. Once the critical micellar concentration (CMC) is achieved, the micelles are separated by increasing the temperature or adding a salting-out agent.…”

Section: Introductionmentioning

confidence: 99%

“…17 In the case of lanthanides extraction/pre-concentration, 8-hydroquinolein and octylphenoxypolyethoxyethanol (Triton X-114) have been employed as complexant and surfactant, respectively. 14,15 Due to the viscosity and organic content of the surfactant-rich phase, which affect plasma performance and stability, appropriate sample introduction systems and nebulizers are required, such as employment of a free-clogging nebulizer, 18 chemical vapour generation, 17 and micronebulization/aerosol desolvation. 19 Analysis of very low amount of solution is possible by using micronebulization/ aerosol desolvation.…”

Section: Introductionmentioning

confidence: 99%

Multivariate optimization for cloud point extraction and determination of lanthanides

et al. 2012

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A cloud point extraction (CPE) method is proposed for pre-concentration of lanthanides and subsequent determination using inductively coupled plasma optical emission spectrometry (ICP OES). Octylphenoxypolyethoxyethanol (Triton X-114) and 1-(2-thenoyl)-3,3,3-trifluoraceton (TTA) are used as surfactant and complexant of the lanthanides, respectively. A three-factor Doehlert matrix design with seven, five, and three levels is used to optimize the TTA and Triton X-114 concentration and the pH of the solution, respectively. The better conditions for pre-concentration are 0.001 to 0.005 mol L À1 TTA, 0.05 to 0.3% (m/v) Triton X-114 and pH from 5.5 to 7.0. Under these conditions, the fourteen naturally occurring lanthanide elements can be pre-concentrated together and then measured. The conditions established were pH 6.0 and 0.175 (m/v) Triton X-114 for all investigated elements; 0.005 mol L À1 TTA for Sm, Eu, Gd, Tb, Ho, Yb and Lu; and 0.001 mol L À1 TTA for La, Ce, Pr, Nd, Dy, Er and Tm. By using axially viewed plasma and pneumatic nebulization/aerosol desolvation, the limits of detection were 0. 028, 0.099, 0.103, 0.020, 0.018, 0.014, 0.013, 0.047, 0.015, 0.009, 0.022, 0.003, 0.002 and 0.002 mg L À1 for La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, respectively. The proposed method was applied for lanthanides determination in mineral water, river water and reference water.

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Lanthanum(III) and gadolinium(III) separation by cloud point extraction

Cited by 44 publications

References 25 publications

Green Processing of Strategic Elements Based on Magnetic Nanohydrometallurgy

Green Processing of Strategic Elements Based on Magnetic Nanohydrometallurgy

Extraction of Rare-Earth Ions with an 8-Hydroxyquinoline Derivative in an Ionic Liquid

Multivariate optimization for cloud point extraction and determination of lanthanides

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