Extraction and back-extraction behaviors of 14 rare earth elements from sulfuric acid medium by TODGA

Yuan, Huiting; Hong, Weixiang; Zhou, Yujie; Pu, Baisong; Gong, Aijun; Xu, Tao; Yang, Qi-Shan; Li, Fukai; Qiu, Lina; Zhang, Weiwei; Liu, Yuning

doi:10.1016/j.jre.2018.01.011

Cited by 30 publications

(9 citation statements)

References 17 publications

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“…Rare earth elements (REEs) are a class of 15 lanthanides in addition to scandium (Sc) and yttrium (Y) that are naturally found in the environment . Due to their unique optical, electrical, and magnetic properties, REEs are widely used in permanent magnets, batteries, as well as high-tech and defense industries. − Annual global production of REEs is about 130 000 metric tons of rare earth oxides (REO) with an approximate value of $2.05 billion. , Increased usage of REEs has led to an increased demand, especially within China, which consumed 119 000 tons of REO in 2014…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Poly(pyrrole-1-carboxylic acid) for Preconcentration and Determination of Rare Earth Elements and Heavy Metals in Water Matrices

Sunder

Rohanifar

Alipourasiabi

et al. 2021

ACS Appl. Mater. Interfaces

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Pyrrole was N-functionalized with solid carbon dioxide followed by chemical polymerization to create a new airstable, granular, and water-insoluble sorbent, poly(pyrrole-1carboxylic acid) (PPy-CO 2 ). PPy-CO 2 exhibited enhanced affinity for the sorption of metal ions compared to unfunctionalized PPy due to the incorporation of carboxylate functional groups directly onto the polymer backbone. As a freestanding sorbent material, immobilization to an additional solid support is not needed. Sorption, and therefore preconcentration, occurs simultaneously to achieve efficient removal and recovery of metal ions by a pHdependent sorption−desorption mechanism. PPy-CO 2 was evaluated on the analytical scale for the solid-phase extraction of a range of metal ions and found to efficiently preconcentrate rare earth elements (REEs), Th, and heavy metals (Cr, Fe, Cd, and Pb), which allowed quantitation by inductively coupled plasma mass spectrometry (ICP-MS). The impact of sorption parameters, such as solution pH, amount of sorbent, and sorption time, and the effect of desorption flow rate for recovery were investigated and optimized using ultrasound-assisted dispersive solid-phase extraction (UAD-SPE) with ICP-MS analysis. Maximum efficiency for sorption and recovery of most metal ions was achieved at a solution pH of 6.0, 10 mg of sorbent, a sorption time of 5 min, and desorption conditions of 1 mL of 2 M nitric acid applied at a flow rate of 0.25 mL min −1 . Detection limits for REEs and Th ranged from 0.2−3.4 ng L −1 for REEs and Th and 0.9−5.7 ng L −1 for heavy metals. Linear ranges from 0.1−1000 μg L −1 for REEs and 0.1− 500 μg L −1 for heavy metals and Th were also observed. PPy-CO 2 successfully preconcentrated and facilitated the determination of the targeted metal ions in water matrices of varying complexity, including tap water, well water, river water, and produced water samples. These results indicate the potential application of PPy-CO 2 for larger-scale recovery and removal of valuable or hazardous metal ions.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Poly(pyrrole-1-carboxylic acid) for Preconcentration and Determination of Rare Earth Elements and Heavy Metals in Water Matrices

Sunder

Rohanifar

Alipourasiabi

et al. 2021

ACS Appl. Mater. Interfaces

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“…This has been shown in the literature for extraction of REE from nitric acid, 31,32 and is also true from HCl and H 2 SO 4 media. 33,34 We show a direct comparison under the same conditions (0.1 M DGA in a modified isoparaffinic kerosene) in Figure 2 for REE extraction from 3 M HCl. In this system, DMDODGA shows superior extraction, 10 to 15-fold higher, than by the TODGA for all lanthanides.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…As mentioned above, phosphate rock and tailings are potential source of REE, and the leaching of REE from these sources will be more economical with dilute H 2 SO 4 . It has been reported that SX using TODGA in kerosene yields nearly quantitative extraction of REE from 6.7 mM REE feed solution at ≥ 5 M H 2 SO 4 33. However, in this work we have found very little extraction of REE by TODGA resin across the range of H 2 SO 4 concentration from 0.1 to 8 M. In contrast, nearly quantitative extraction of the REE is observed by the DMDODGA resin at high H 2 SO 4 acidities [except La and Ce (still high >98% extraction)] (Figure6).…”

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confidence: 99%

Extraction Chromatographic Materials for Clean Hydrometallurgical Separation of Rare-Earth Elements Using Diglycolamide Extractants

Momen

Healy

Tsouris

et al. 2019

Ind. Eng. Chem. Res.

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The uncertain supply of the rare-earth elements (REE) from conventional sources such as bastnaesite and monazite demands the search for alternative sources. Unconventional sources such as phosphate rock and mine tailings have REE contents at the level of only hundreds to a thousand parts per million, which challenges the conventional REE separation methods such as solvent extraction (SX) and ion exchange (IX). Alternatively, the potential of extraction chromatography (EXC) has been explored, as it combines the selectivity of SX and the convenience of column techniques of IX. Herein, we report a novel EXC material incorporating N,N′-dimethyl-N,N′-dioctyl-3-oxa-diglycolamide (DMDODGA) into a porous solid support because DMDODGA exhibits higher extraction efficiency for REE in SX than does conventional N,N,N′,N′-tetraoctyl-3oxa-diglycolamide (TODGA) and as also compared with similarly made conventional TODGA-based EXC material. The extraction of mixed REE by DMDODGA and TODGA resins was evaluated in H 2 SO 4 , HCl, and HNO 3 media as a function of acid concentration. The REE feed concentrations were adjusted to achieve stoichiometric REE concentration and excess REE concentration, conditions that reflect near or complete saturation of resin capacity. In general, extraction at the same acid concentration followed the order HNO 3 > HCl > H 2 SO 4 . The extraction strength of the DMDODGA resin is significantly higher than that of the TODGA resin in all three examined mineral acids, especially at lower H 2 SO 4 and HCl concentrations (0.01 and 0.1 M), making it a promising EXC material for hydrometallurgical extraction of REE.

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“…Their recovery proceeds as sub-products from the processing of other metals from diverse resources: red mud valorization, phosphoric acid synthesis from phosphate ores [7], and ore leachates. The usual hydrometallurgical processes such as solvent extraction [8] and sorption on resins [9][10][11] can be applied for the treatment of high or low concentration effluents, respectively [12]. The complexity of the leachates (due to the presence of many transition metals) requires developing processes efficient for the separation of REEs from base metals [13].…”

Section: Introductionmentioning

confidence: 99%

Efficient Recovery of Rare Earth Elements (Pr(III) and Tm(III)) From Mining Residues Using a New Phosphorylated Hydrogel (Algal Biomass/PEI)

Salih

Wei

et al. 2021

Metals

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With the target of recovering rare earth elements (REEs) from acidic leachates, a new functionalized hydrogel was designed, based on the phosphorylation of algal/polyethyleneimine beads. The functionalization strongly increased the sorption efficiency of the raw material for Pr(III) and Tm(III). Diverse techniques were used for characterizing this new material and correlating the sorption performances and mechanisms to the physicochemical structure of the sorbent. First, the work characterized the sorption properties from synthetic solutions with the usual procedures (study of pH effect, uptake kinetics, sorption isotherms, metal desorption and sorbent recycling, and selectivity from multi-element solutions). Optimum pH was found close to 5; sorption isotherms were fitted by the Langmuir equation (maximum sorption capacities close to 2.14 mmol Pr g−1 and 1.57 mmol Tm g−1). Fast uptake kinetics were modeled by the pseudo-second order rate equation. The sorbent was highly selective for REEs against alkali-earth and base metals. The sorbent was remarkably stable for sorption and desorption operation (using 0.2 M HCl/0.5 M CaCl2 solutions). The sorbent was successfully applied to the leachates of Egyptian ore (pug leaching) after a series of pre-treatments (precipitation steps), sorption, and elution. The selective precipitation of REEs using oxalic acid allows for the recovery of a pure REE precipitate.

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Extraction and back-extraction behaviors of 14 rare earth elements from sulfuric acid medium by TODGA

Cited by 30 publications

References 17 publications

Synthesis and Characterization of Poly(pyrrole-1-carboxylic acid) for Preconcentration and Determination of Rare Earth Elements and Heavy Metals in Water Matrices

Synthesis and Characterization of Poly(pyrrole-1-carboxylic acid) for Preconcentration and Determination of Rare Earth Elements and Heavy Metals in Water Matrices

Extraction Chromatographic Materials for Clean Hydrometallurgical Separation of Rare-Earth Elements Using Diglycolamide Extractants

Efficient Recovery of Rare Earth Elements (Pr(III) and Tm(III)) From Mining Residues Using a New Phosphorylated Hydrogel (Algal Biomass/PEI)

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