Lanthanide-Imprinted Resins Prepared by Surface Template Polymerization.

Araki, Kosuke; Yoshida, Masahiro; Uezu, Kazuya; Goto, Masahiro; Furusaki, Shintaro

doi:10.1252/jcej.33.665

Cited by 36 publications

(19 citation statements)

References 4 publications

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“…With decreasing pH, the ratio of protonated DCQ to free DCQ increases, resulting in lower and lower percent extraction [22]. These observations are similar to those of our earlier study on erbium [13] and also similar to those of Araki et al [23]. The maximum percentage recovery of Y in the pH range 7.0 -8.0 in case of DCQ is not surprising as lanthanide ions complex with DCQ are extracted at lower pH values than those of quinoline-8-ol [24].…”

Section: Selectivity Coefficients Of Y With Respect To Other Lanthanidessupporting

confidence: 92%

Ion imprinted polymer particles for separation of yttrium from selected lanthanides

Kala

Rao²

2006

J of Separation Science

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Lanthanide(III) (Dy, Gd, Tb and Y) ion imprinted polymer (IIP) materials were synthesized via single pot reaction by mixing lanthanide imprint ion with 5,7-dichloroquinoline-8-ol, 4-vinylpyridine, styrene, divinylbenzene and 2,2'-azobisisobutyronitrile in 2-methoxyethanol porogen. The imprint ion was removed by stirring the above materials (after powdering) with 6 mol/L HCl to obtain the respective lanthanide IIP particles. Y-Dy, Y-Gd and Dy-Gd polymer particles were obtained by physically mixing equal amounts of the respective leached individual lanthanide(III) particles. Control polymer (CP) particles were similarly prepared without imprint ion. Application of the above synthesized polymer particles was tested for separation of Y from Dy, Gd and Tb employing batch and column SPE methods using inductively coupled plasma atomic emission spectrometry for the determination. Optimization studies show that Y present in 500 mL can be preconcentrated using Dy-Gd IIP particles and eluted with 20 mL of 1.0 mol/L of HCl, providing an enrichment factor of approximately 25. Dy-Gd IIP particles offer higher selectivity coefficients for Y over other lanthanides compared to other IIP particles and commercial liquid-liquid extractants. Selectivity studies for Y over other coexisting inorganic species (other than lanthanides) were also conducted and the results obtained show a quantitative separation of Y from other inorganics other than Cu(II) and Fe(III). Furthermore, both batch and column studies indicate the purification of yttrium concentrate from 55.0 +/- 0.2 to 65.2 +/- 0.2% in a single stage of operation.

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Section: Selectivity Coefficients Of Y With Respect To Other Lanthanidessupporting

confidence: 92%

Ion imprinted polymer particles for separation of yttrium from selected lanthanides

Kala

Rao²

2006

J of Separation Science

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“…In regard to REEs, a separate database was also prepared from journal articles published by Wood et al [44][45][46][47][48] and ongoing Idaho National Laboratory (INL) projects analyzing geothermal/oil and gas well brines of the eastern Snake River Plain, southeastern Idaho, and Wyoming Basin. Figure 2 shows a representation of the data compiled by Neupane and Wendt [24] of total filtered REE concentration (ng/kg, or parts per trillion) versus well pH.…”

Section: Rees In Geothermal Brinesmentioning

confidence: 99%

On the Extraction of Rare Earth Elements from Geothermal Brines

2017

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The availability of rare earth elements from primary resources has come into question in the last two decades. This has sparked various government and industry initiatives to examine potential rare earth element resources apart from virgin ore bodies. Geothermal fluids are potentially significant sources of valuable minerals and metals, while co-recovery with geothermal energy production would be an attractive sustainable system. In this work, we give a brief survey of data collected on rare earth element concentrations in geothermal fluids. A survey of methods and technologies for extracting rare earth elements from geothermal is discussed along with the feasibility of recovering rare earth elements from geothermal brines. Based on the findings of this study, rare earth element extraction from geothermal fluids is technically possible, but neither economically viable nor strategically significant at this time.

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“…Many adsorbents for REEs have been studied [7][8][9][10][11][12][13][14][15][16][17]; however, none is in practical use, and the adsorption of dilute REE ions from solutions containing high concentrations of base metal ions is particularly difficult with the adsorbents reported to date.…”

Section: Introductionmentioning

confidence: 99%

Diglycolamic Acid–Grafted Film-Type Adsorbent for Selective Recovery of Rare Earth Elements

Ogata

Narita

Tanaka

et al. 2016

SERDJ

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Previously, we investigated bead-type silica gel adsorbents bearing immobilized diglycolamic acid ligands for the recovery of rare earth elements (REEs). Although the ligand-bearing silica gel selectively adsorbs REEs, the ligand loading is limited by the specific surface area of the silica gel. To increase the ligand loading, we have prepared a film-type adsorbent by immobilizing diglycolamic acid ligands on a nonwoven poly(vinyl alcohol) fabric by means of grafting polymerization. Compared with the silica gel adsorbent, the film-type adsorbent showed similar selectivity for a heavy REE, but the adsorption capacity of the film-type adsorbent was 3-4 times that of the silica gel adsorbent because the ligand loading on the former was 3.81 times that on the latter.

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Lanthanide-Imprinted Resins Prepared by Surface Template Polymerization.

Cited by 36 publications

References 4 publications

Ion imprinted polymer particles for separation of yttrium from selected lanthanides

Ion imprinted polymer particles for separation of yttrium from selected lanthanides

On the Extraction of Rare Earth Elements from Geothermal Brines

Diglycolamic Acid–Grafted Film-Type Adsorbent for Selective Recovery of Rare Earth Elements

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