Chromatographic separation of rare earths from aqueous and ethanolic leachates of NdFeB and SmCo magnets by a supported ionic liquid phase

Avdibegović, Dženita; Binnemans, Koen

doi:10.1039/d0ra09766g

Cited by 10 publications

(3 citation statements)

References 44 publications

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“…The group of rare earth elements comprises 17 elements, including Sc, Y, and the lanthanides. Owing to their unique electronic, optical, and magnetic properties, these metals are indispensable in modern technology. − For example, Sm-, Co-, and Nd-Fe-B permanent magnets exhibit excellent magnetic properties. − Specifically, by taking advantage of its resistance to corrosion and oxidation and its large operating temperature range (>250 °C), SmCo permanent magnets have been used in industrial applications, such as aeroengines. − However, rare earth metals are expensive because their natural resources are limited in most countries …”

Section: Introductionmentioning

confidence: 99%

Poly(vinyl diglycolic acid ester)-Grafted Polyethylene/Polypropylene Fiber Adsorbent for Selective Recovery of Samarium

Hamada

Hoshina

Seko

2022

ACS Appl. Polym. Mater.

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Poly(vinyl diglycolic acid ester)-grafted polyethylene fabric (PE-PDGA) containing 1.71−4.58 mmol/g millimolar equivalents (meqs) of immobilized tridentate ligand were prepared through radiation-induced graft polymerization of vinyl acetate, saponification, and a ring-opening reaction of diglycolic anhydride. PE-PDGA can adsorb rare earth metal ions, such as Sm, Nd, and Dy, at pH 2.5, with an increase in the removal ratio of the Sm, Nd, and Dy ions observed with an increase in the pH from 2.5 to 4. Furthermore, PE-PDGA more selectively adsorbs rare earth metals, such as Sm, Nd, and Dy, than other metals, such as Cu, Zn, and Co, in the pH range of 2.5−4; 73 mg Sm was adsorbed on 1 g PE-PDGA at an initial metal concentration of 100 ppm at pH 3, while Co was not adsorbed on PE-PDGA in the initial metal concentration range of 10 to 100 ppm. Thus, PE-PDGA showed high selectivity toward rare earth metals, and Sm and Co could be separated effectively.

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Section: Introductionmentioning

confidence: 99%

Poly(vinyl diglycolic acid ester)-Grafted Polyethylene/Polypropylene Fiber Adsorbent for Selective Recovery of Samarium

Hamada

Hoshina

Seko

2022

ACS Appl. Polym. Mater.

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“…This aspect is important, given that reference materials (RM) for waste Sm-Co magnets, with certified concentrations of elements in principle, are not available. Several procedures have been described in the literature for sample preparation in relation to RE magnets [5,[12][13][14][15]. Most of these are primarily based on decomposition using mixtures of acids in open vessels.…”

Section: Introductionmentioning

confidence: 99%

Microwave Digestion and ICP-MS Determination of Major and Trace Elements in Waste Sm-Co Magnets

Korotkova

Baranovskaya

Petrova

2022

Metals

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In this article, inductively coupled plasma mass-spectrometry (ICP-MS) and inductively coupled plasma optical-emission spectrometry (ICP-OES) were used for the development of an analytical procedure for analysis of the waste of Sm-Co magnets. Experimental parameters related to microwave digestion processes and acid concentrations were optimized. Microwave digestion was carried out in mixtures of HF, HCl, HNO3 and H2SO4. The complete dissolution of the samples occurred in the system: 10 mL H2O, 2 mL HNO3, 10 mL HCl and 1 mL H2SO4. The dependence of the matrix effect on the ICP-MS analysis of waste Sm-Co magnets was studied and optimal instrumental parameters were investigated (nebulizer gas flow, sampling depth and potential at the extractor lens). The optimal conditions were a nebulizer gas flow of 0.85–0.90 L/min, a sampling depth of 101, potential at the extractor lens of −400 V and a sample flow rate of 50 rpm. A recovery test and inter-method experiments were performed to verify the accuracy of the proposed method.

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“…It is difficult to extract lanthanides from these hosts unless dangerous strong acids such as hydrochloric acid and sulphuric acid are employed to corrode them. [13][14][15] The use of strong acids is usually restricted in many industrial cases because of their strong corrosiveness and toxicity. As compared to their alumina-and silicate-based counterparts, phosphate-based phosphors have excellent luminescent properties but have a relative hydrolytic tendency.…”

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confidence: 99%

Phosphate-based phosphor for the urban mining of lanthanides: a case study of samarium

Chen,

Wu,

2024

RSC Sustain.

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Chromatographic separation of rare earths from aqueous and ethanolic leachates of NdFeB and SmCo magnets by a supported ionic liquid phase

Abstract: Chromatographic separation of rare earths, iron and cobalt from the aqueous and ethanolic leachates of NdFeB and SmCo magnets.

Cited by 10 publications

References 44 publications

Poly(vinyl diglycolic acid ester)-Grafted Polyethylene/Polypropylene Fiber Adsorbent for Selective Recovery of Samarium

Poly(vinyl diglycolic acid ester)-Grafted Polyethylene/Polypropylene Fiber Adsorbent for Selective Recovery of Samarium

Microwave Digestion and ICP-MS Determination of Major and Trace Elements in Waste Sm-Co Magnets

Phosphate-based phosphor for the urban mining of lanthanides: a case study of samarium

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