Solvent extraction of uranium from leach solutions obtained in processing of Polish low-grade ores

Kiegiel, Katarzyna; Abramowska, Anna; Biełuszka, Paweł; Zakrzewska-Kołtuniewicz, Grażyna; Wołkowicz, Stanisław

doi:10.1007/s10967-016-5029-5

Cited by 39 publications

(16 citation statements)

References 15 publications

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“…The treatment of acidic leachates may involve a wide range of techniques including selective precipitations [6], solvent extraction [7][8][9], and impregnated resins [10][11][12]. However, sorption processes have retained more attention for the treatment of low-concentration effluents.…”

Section: Introductionmentioning

confidence: 99%

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Hamza

Mubark

Wei

et al. 2020

Gels

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The necessity to recover uranium from dilute solutions (for environmental/safety and resource management) is driving research towards developing new sorbents. This study focuses on the enhancement of U(VI) sorption properties of composite algal/Polyethylenimine beads through the quaternization of the support (by reaction with glycidyltrimethylammonium chloride). The sorbent is fully characterized by FTIR, XPS for confirming the contribution of protonated amine and quaternary ammonium groups on U(VI) binding (with possible contribution of hydroxyl and carboxyl groups, depending on the pH). The sorption properties are investigated in batch with reference to pH effect (optimum value: pH 4), uptake kinetics (equilibrium: 40 min) and sorption isotherms (maximum sorption capacity: 0.86 mmol U g−1). Metal desorption (with 0.5 M NaCl/0.5 M HCl) is highly efficient and the sorbent can be reused for five cycles with limited decrease in performance. The sorbent is successfully applied to the selective recovery of U(VI) from acidic leachate of uranium ore, after pre-treatment (cementation of copper, precipitation of rare earth elements with oxalate, and precipitation of iron). A pure yellow cake is obtained after precipitation of the eluate.

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Section: Introductionmentioning

confidence: 99%

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Hamza

Mubark

Wei

et al. 2020

Gels

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“…There are several methods for uranium removal and recovery from aqueous solutions, such as ion‐exchange, 8 chemical precipitation, 9 solvent extraction, 10 membrane separation 11 adsorption 12,13 and so forth. Among the different techniques, adsorption is the most attractive method for this purpose due to its easy operation, the low‐cost and low waste rate 9,14,15 .…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic polyvinylpyrrolidone/chitosan/Fe₃O₄ electrospun nanofibers as effective U(VI) adsorbents

Philippou

Christou

Socoliuc

et al. 2020

J of Applied Polymer Sci

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Magnetoactive electrospun fibrous membranes consisting of polyvinylpyrrolidone (PVP), chitosan (CS) and pre‐fabricated, double‐layer oleic acid‐coated magnetite nanoparticles (OA.OA.Fe3O4) were fabricated and evaluated as new adsorbent materials for the removal and recovery of uranium (U(VI)) from aqueous solutions. The adsorption has been investigated by batch‐type experiments and the solid material has been characterized by X‐ray diffraction spectroscopy (XRD), Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy/energy dispersive X‐ray analysis (TEM/EDX) and vibration sample magnetometry (VSM) measurements prior and after uranium adsorption. The experimental adsorption data were found to be well fitted with the Langmuir isotherm and the pseudo‐second order kinetic model. The results indicate that PVP/CS/OA.OA.Fe3O4 fibrous adsorbents exhibit good adsorption properties towards U(VI) in aqueous solutions, achieving a qmax value of 0.77 mol kg−1 (183.3 mg g−1) at pH 6.0. The experiments regarding the regeneration and reuse of the magnetoactive adsorbents were carried out using Na2CO3, at pH ~11. After four cycles, the percentage relative adsorption remained stable (~100%) whereas the desorption percentage decreased from 31.9% to 21.0%. Generally, the presented results demonstrate that the incorporation of the Fe3O4 NPs has a positive effect on the adsorption efficiency of U(VI) from aquatic environments.

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“…The formation of the third phase may cause many difficulties; first of all, it leads to organic solvent loss. The minimization of the formation of the third phase can be achieved by addition of a modifier to the organic phase [40] or by application of membrane contactors, a multistage mixer-settler arrangement with concurrent flow of two phases-aqueous and organic [41].…”

Section: Separation Of Ree From Polish Resourcesmentioning

confidence: 99%

Perspective of Obtaining Rare Earth Elements in Poland

Kiegiel¹,

Miśkiewicz²,

Herdzik-Koniecko³

et al. 2019

Lanthanides

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Along with the increasing development of electric and electronic industries, the demand for rare earth elements is also growing due to their high position in many applications. In Poland, there are minerals containing REE; however, the concentration of these elements in raw materials is rather low, so they do not have a big impact on the national economy. The potential source of REE is secondary materials; among them are phosphogypsum, uranium tailings, and the waste electrical and electronic equipment (WEEE). Lanthanides as accompanying metals of uranium in Polish uranium ores were leached in the technology of uranium recovery from these resources. The recovery of REE from pregnant liquors was conducted by solvent extraction and ion exchange. Novel apparatus solutions like membrane contactors in extraction stage were tested. Different types of matrices (uranium ore, phosphorites, etc.) were used.

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Solvent extraction of uranium from leach solutions obtained in processing of Polish low-grade ores

Cited by 39 publications

References 15 publications

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Superparamagnetic polyvinylpyrrolidone/chitosan/Fe₃O₄ electrospun nanofibers as effective U(VI) adsorbents

Perspective of Obtaining Rare Earth Elements in Poland

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Solvent extraction of uranium from leach solutions obtained in processing of Polish low-grade ores

Cited by 39 publications

References 15 publications

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Superparamagnetic polyvinylpyrrolidone/chitosan/Fe3O4 electrospun nanofibers as effective U(VI) adsorbents

Perspective of Obtaining Rare Earth Elements in Poland

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Product

Resources

About

Superparamagnetic polyvinylpyrrolidone/chitosan/Fe₃O₄ electrospun nanofibers as effective U(VI) adsorbents