Adsorption-extraction mechanism of heavy rare earth by Cyanex272-P507 impregnated resin

Liao, Chunfa; Jiao, Yunfen; Liang, Yong; Jiang, Pingguo; Nie, Heng–Yong

doi:10.1016/s1003-6326(09)60330-7

Cited by 33 publications

(10 citation statements)

References 5 publications

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“…Other groups reported higher adsorption capacities for lanthanide extraction by different sorbent materials: Liao et al 70 mg La /g NP for citrate coated magnetic nanoparticles [25]; Kondo et al 230 mg La /g MC using microcapsules containing 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester [26]; Wu et al 55.9 mg La /g NP using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester-grafted magnetic silica nanocomposites [27]; Awwad et al found 175.4 mg La /g and 250 mg Er /g of activated carbon [28]; Dupont et al have found in the literature several values for gadolinium uptake, such as 14 mg Gd /g NP of Fe 3 O 4 , 20 mg Gd /g NP of SiO 2 , 41 mg Gd /g NP of TiO 2 , and 113 mg Gd /g NP of Fe 3 O 4 (TMS-EDTA), among others [29]. …”

Section: Resultsmentioning

confidence: 99%

Lanthanide sorbent based on magnetite nanoparticles functionalized with organophosphorus extractants

Basualto

Gaete

Molina

et al. 2015

Science and Technology of Advanced Materials

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In this work, an adsorbent was prepared based on the attachment of organophosphorus acid extractants, namely, D2EHPA, CYANEX 272, and CYANEX 301, to the surface of superparamagnetic magnetite (Fe3O4) nanoparticles. The synthesized nanoparticles were coated with oleic acid, first by a chemisorption mechanism and later by the respective extractant via physical adsorption. The obtained core–shell functionalized magnetite nanoparticle composites were characterized by dynamic light scattering, scanning electron microscopy, transmission electron microscopy, thermogravimetry, infrared absorption and vibrating sample magnetometry. All the prepared nanoparticles exhibited a high saturation magnetization capacity that varied between 72 and 46 emu g−1 and decreased as the magnetite nanoparticle was coated with oleic acid and functionalized. The scope of this study also included adsorption tests for lanthanum, cerium, praseodymium, and neodymium and the corresponding analysis of their results. Sorption tests indicated that the functionalized nanoparticles were able to extract the four studied lanthanide metal ions, although the best extraction performance was observed when the sorbent was functionalized with CYANEX 272, which resulted in a loading capacity of approximately 12–14 mgLa/gMNP. The magnetization of the synthesized nanoparticles was verified during the separation of the lanthanide-loaded sorbent from the raffinate by using a conventional magnet.

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Section: Resultsmentioning

confidence: 99%

Lanthanide sorbent based on magnetite nanoparticles functionalized with organophosphorus extractants

Basualto

Gaete

Molina

et al. 2015

Science and Technology of Advanced Materials

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“…However, the literature data on dual-extractant-impregnated resins are relatively limited. Liao et al [43,44] impregnated one macroporous adsorption resin by P507 (2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) and Cyanex 272 (bis(2,4,4-trimethylpentyl)phosphinic acid), and used it to enrich the heavy REEs Tm-Yb-Lu. The experimental results showed that the dual-extractant system can overcome the drawbacks of a single extractant by combining with the REEs to form complex ions.…”

Section: Extractants In Sirsmentioning

confidence: 99%

Recovery and Separation of Metal Ions from Aqueous Solutions by Solvent‐Impregnated Resins

et al. 2016

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The recovery and separation of metals from aqueous solutions is one of the research hotspots in hydrometallurgy, environment protection, analytical chemistry, etc. Much attention has been paid to solvent-impregnated resins (SIRs) since these were firstly proposed for the extraction of metals. SIRs are characterized by high efficiency and selectivity, convenient preparation, and easy operation because they combine the unique advantages of solvent extraction and ion exchange. The preparation and features of SIRs are summarized and their applications in the extraction of various metals from solutions are reviewed. In addition, the equilibrium, thermodynamics, and sorption kinetics of the metals onto SIRs are elucidated in detail.

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“…The methods for stabilization of SIRs can be classified as: (i) removal of the loosely attached extractants to the macroporous supports through washing by hot water or organics 43, 54, such as the wet drying technique; (ii) post‐impregnation formation of a semipermeable membrane or protective barrier around the beads of SIRs, i.e., post‐impregnation encapsulation or coating technique. Muraviev 53 intensively discussed the wet drying technique and revealed that the IX interaction on SIRs proceeds faster after the wet drying procedure and it can improve the kinetic characteristics of SIRs.…”

Section: Preparation Of Extraction Resinsmentioning

confidence: 99%

Strategies for Organic Drug Synthesis and Design. By Daniel Lednicer.

Anthonsen

2009

ChemMedChem

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The recovery and separation of metals from aqueous solutions is one of the research hotspots in hydrometallurgy, environment protection, analytical chemistry, etc. Much attention has been paid to solvent‐impregnated resins (SIRs) since these were firstly proposed for the extraction of metals. SIRs are characterized by high efficiency and selectivity, convenient preparation, and easy operation because they combine the unique advantages of solvent extraction and ion exchange. The preparation and features of SIRs are summarized and their applications in the extraction of various metals from solutions are reviewed. In addition, the equilibrium, thermodynamics, and sorption kinetics of the metals onto SIRs are elucidated in detail.

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Adsorption-extraction mechanism of heavy rare earth by Cyanex272-P507 impregnated resin

Cited by 33 publications

References 5 publications

Lanthanide sorbent based on magnetite nanoparticles functionalized with organophosphorus extractants

Lanthanide sorbent based on magnetite nanoparticles functionalized with organophosphorus extractants

Recovery and Separation of Metal Ions from Aqueous Solutions by Solvent‐Impregnated Resins

Strategies for Organic Drug Synthesis and Design. By Daniel Lednicer.

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