Selective ion-exchange separation of scandium(III) over iron(III) by crystalline α-zirconium phosphate platelets under acidic conditions

Avdibegović, Dženita; Zhang, Wenzhong; Xu, Jü; Regadío, Mercedes; Koivula, Risto; Binnemans, Koen

doi:10.1016/j.seppur.2018.12.079

Cited by 34 publications

(21 citation statements)

References 53 publications

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“…According to the PXRD pattern shown in Figure S1, 1-D 2 O is a layered and highly ordered crystalline material with the interlayer distance of 7.6 Å. [7,8] The 31 P{ 1 H} MAS NMR spectrum of 1-D 2 O manifests two resonances at δ of À21.4 and À23.1 ppm (Figure 2). Because the chemical shift difference of these signals is small, their accurate assignment clearly plays a principal role.…”

Section: Resultsmentioning

confidence: 99%

Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by ³¹P and ²H solid‐state MAS NMR spectra

Bakhmutov

Contreras-Ramírez

Banerjee

et al. 2021

Magnetic Reson in Chemistry

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In developing the approach to understanding dynamics of intercalates in layered materials, crystalline-layered zirconium phosphate Zr (HPO 4 ) 2 Á0.35D 2 O has been prepared and characterized by the 1 H, 31 P, and 2 H solid-state MAS NMR spectra, including 31 P and 2 H T 1 measurements. At temperatures >253 K, the intercalated water shows two spectrally-distinguished deuterons unprecedentedly with different DQCC's and 2 H T 1 times, one of which is hydrogen bonded. The collected data allowed to identify an unexpected bonding/dynamic mode of water molecules, which experience fast rotation around the hydrogen bond, formed with a zirconium-coordinated oxygen. The lowtemperature 2 H MAS NMR experiments have demonstrated the presence of additional hydrogen bond P (H)O˙˙˙DO, population of which grows on cooling to 195 K corresponding to the doubly hydrogen-bonded immobile water molecule.

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Section: Resultsmentioning

confidence: 99%

Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by ³¹P and ²H solid‐state MAS NMR spectra

Bakhmutov

Contreras-Ramírez

Banerjee

et al. 2021

Magnetic Reson in Chemistry

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“…In previous ion-exchange studies, it has been pointed out that scandium(III) and iron(III) separation from BR leachates is challenging because of the similar charge density of these ions and their similar hydration enthalpies. 18 As it is also one of the major elements in the leachate of BR, iron was chosen for the sorption studies as a competitive ion to scandium.…”

Section: Results and Discussionmentioning

confidence: 99%

Separation of Scandium from Hydrochloric Acid–Ethanol Leachate of Bauxite Residue by a Supported Ionic Liquid Phase

Avdibegović

Binnemans

2020

Ind. Eng. Chem. Res.

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Solvometallurgy is a new branch of extractive metallurgy in which green organic solvents are used instead of aqueous solutions to improve selectivity in separation processes. In the present study, nonaqueous leaching of a Greek bauxite residue (BR) was performed and scandium was separated from other elements in the leachate by column chromatography. At first, the selectivity of sorbents for scandium(III) over iron(III) was tested in batch mode using various organic solvents. The following three sorbents were tested: (1) a carboxylic acid-functionalized supported ionic liquid phase (SILP), (2) silica (SiO 2 ), and (3) silica functionalized with ethylenediaminetetraacetic acid (SiO 2 –TMS–EDTA). The best separation of scandium and iron was achieved from ethanolic solution by the SILP. The BR was then leached with 0.7 mol L –1 HCl in ethanol or in water. The leaching efficiency of scandium with both lixiviants was similar. However, much less sodium was leached, and silica remained in solution when leaching was performed with the ethanolic lixiviant. By using ethanol as opposed to water, the serious drawback of silica gel formation that is taking place in the aqueous leachate of BR was circumvented. The sorption preference of the SILP for metal ions in the ethanolic leachate was partly reversed compared to the aqueous leachate. Iron was separated from other metals of the ethanolic BR leachate by a simple elution with ethanol. The formation of the anionic tetrachloroferrate(III) complex, [FeCl 4 ] − , enabled the selective elution. This complex was not observed in the aqueous leachate of BR. Scandium was separated from the vast majority of other components of the BR by elution with 0.1 mol L –1 H 3 PO 4 .

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“…Adsorption of Ni 2+ followed pseudo-first-order kinetics with a rate constant of 1.24 × 10 –2 s –1 , and therefore the diffusion of Ni 2+ ions is believed to be the rate-limiting step. Toxicity concerns of acetonitrile motivated the same research group to extend the film fabrication in an environmentally green aqueous medium. , However, in the aqueous medium direct fabrication of PANI/ZrP is not so easy because it involves adsorption of a dense layer of α-ZrP on the Au surface, which inhibits electropolynmerization of PANI. To avoid this limitation PANI/ZrP film was fabricated on carbon nanotube (CNT) modified Au electrode .…”

Section: Ion Exchange and Sorption Of Metal Ionsmentioning

confidence: 99%

Revisiting the Old and Golden Inorganic Material, Zirconium Phosphate: Synthesis, Intercalation, Surface Functionalization, and Metal Ion Uptake

Bashir

Ahad

Malik

et al. 2020

Ind. Eng. Chem. Res.

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As a fascinating two-dimensional (2D) layered inorganic ion exchange material, zirconium phosphate (hereafter ZrP) has drawn interdisciplinary attention as an ion exchange material and a competent host for surface functionalization and intercalation. This is due to its captivating properties such as simple synthesis procedure, excellent ion-exchange capacity, excellent chemical, thermal, and radiolytic stability, tunable interlayer gallery, and good biocompatibility. Among all the well-known phases of ZrP, we restrict our discussion only to the alpha (α-ZrP) and gamma (γ-ZrP) phases for their efficient ion exchange performance and more tunable interlayer spacing. This review summarizes a panorama of the recent research progress on the synthesis, intercalation, and surface functionalization of ZrP with organic molecules, metal complexes, and metal ions for the design and fabrication of self-assembled monolayers, layer-by-layer assemblies, and nanocomposites. Within the confined gallery microenvironment of ZrP, usual molecules behave unusually with dramatic enhancement in the photophysical properties. The intercalation of metal complexes and their fascinating electronic properties will also be comprehensively highlighted in this review. Furthermore, for the first time, a cutting-edge advancement (2010 onward) of the versatile adsorption performance of ZrP-based materials for the uptake of toxic metal ions which include nuclear waste-related metal ions, heavy metal ions, and rare earth ions will be presented in detail. Last but not least, the review will conclude with the summary and future directions, which will provide new research opportunities for the development of ZrP based sustainable heterofunctional material.

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Selective ion-exchange separation of scandium(III) over iron(III) by crystalline α-zirconium phosphate platelets under acidic conditions

Abstract: Selective ionexchange separation of scandium(III) over iron(III) by crystalline α-zirconium phosphate platelets under acidic conditions, Separation and Purification Technology (2018), doi:

Cited by 34 publications

References 53 publications

Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by ³¹P and ²H solid‐state MAS NMR spectra

Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by ³¹P and ²H solid‐state MAS NMR spectra

Separation of Scandium from Hydrochloric Acid–Ethanol Leachate of Bauxite Residue by a Supported Ionic Liquid Phase

Revisiting the Old and Golden Inorganic Material, Zirconium Phosphate: Synthesis, Intercalation, Surface Functionalization, and Metal Ion Uptake

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Selective ion-exchange separation of scandium(III) over iron(III) by crystalline α-zirconium phosphate platelets under acidic conditions

Abstract: Selective ionexchange separation of scandium(III) over iron(III) by crystalline α-zirconium phosphate platelets under acidic conditions, Separation and Purification Technology (2018), doi:

Cited by 34 publications

References 53 publications

Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by 31P and 2H solid‐state MAS NMR spectra

Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by 31P and 2H solid‐state MAS NMR spectra

Separation of Scandium from Hydrochloric Acid–Ethanol Leachate of Bauxite Residue by a Supported Ionic Liquid Phase

Revisiting the Old and Golden Inorganic Material, Zirconium Phosphate: Synthesis, Intercalation, Surface Functionalization, and Metal Ion Uptake

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Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by ³¹P and ²H solid‐state MAS NMR spectra

Unexpected structural/motional mode of water intercalated into an α‐crystalline zirconium phosphate deduced by ³¹P and ²H solid‐state MAS NMR spectra