Liquid–liquid extraction of uranium(VI) in the system with a membrane contactor

Biełuszka, Paweł; Zakrzewska, Grażyna; Chajduk, Ewelina; Dudek, J.

doi:10.1007/s10967-013-2796-0

Cited by 15 publications

(6 citation statements)

References 11 publications

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“…[37]. The second one was recovering of uranium from post-leaching solutions by using solvent extraction with application of the membrane contactors with polypropylene porous membranes [38].…”

Section: Novel Methods Of Uranium Extraction By Using Membrane Methodsmentioning

confidence: 99%

Uranium in Poland: Resources and Recovery from Low-Grade Ores

Kiegiel¹,

Miśkiewicz²,

Gajda³

et al. 2018

Uranium - Safety, Resources, Separation and Thermodynamic Calculation

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The presented studies deal with an assessment of the possibility of uranium recovery from the low-grade uranium resources in Poland. Uranium was leached from the ground uranium ores with efficiencies in 81-100% range that depend on the type of ore and leaching solution used. In the next step, the post-leaching solution was treated by the solvent extraction or ion exchange chromatography to separate uranium from other metals present in the ore. The novel routes of leaching by using membrane methods were examined. The final product, "yellow cake," was obtained in precipitation step. The studies of precipitation of uranium as ammonium diuranate or uranium peroxide from diluted uranium solutions are presented in this chapter. The work was completed with tentative economic analysis and environmental impact assessment along with radiation protection issues connected to uranium production.

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Section: Novel Methods Of Uranium Extraction By Using Membrane Methodsmentioning

confidence: 99%

Uranium in Poland: Resources and Recovery from Low-Grade Ores

Kiegiel¹,

Miśkiewicz²,

Gajda³

et al. 2018

Uranium - Safety, Resources, Separation and Thermodynamic Calculation

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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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“…The pressure profiles along the lumen and shell sides should therefore be calculated to estimate the maximum pressure difference. Following Biełuszka et al (2014) …”

Section: Estimation Of Phase Equilibrium Parameters and Diffusivitiesmentioning

confidence: 99%

Non-dispersive solvent extraction of p-toluic acid from purified terephthalic acid plant wastewater with p-xylene as extractant

Kong

Cheng

Wang

et al. 2016

J. Zhejiang Univ. Sci. A

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Non-dispersive solvent extraction (NDSE) with p-xylene as extractant was employed as a novel separation method to recover both p-toluic (PT) acid and water from purified terephthalic acid (PTA) wastewater. The mass transport behavior of PT acid from aqueous solution to p-xylene was investigated by experiments and numerical simulation. Experiments showed that NDSE is feasible and effective. Residual PT acid in the raffinate can be reduced to lower than the permitted limit of wastewater re-use (100 g/m 3 ) with extraction time longer than 60 s in industrial conditions. A mathematical model of PT acid mass transport was developed to optimize the membrane module performance. The model was validated with the experimental results with relative errors of less than 6%. Numerical analysis for mass transfer through the lumen side, the porous membrane layer, and the shell side showed that PT acid transport in the aqueous solution is the rate determining step. The effects of the membrane and operating parameters on membrane module performance were investigated by means of computational simulations. The key parameters suggested for industrial NDSE design are: fiber inner radius r 1 =200-250 μm, extraction time t e =50-60 s, aqueous/ organic volumetric ratio a/o=9.0, and temperature T=318 K.

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Liquid–liquid extraction of uranium(VI) in the system with a membrane contactor

Cited by 15 publications

References 11 publications

Uranium in Poland: Resources and Recovery from Low-Grade Ores

Uranium in Poland: Resources and Recovery from Low-Grade Ores

Perspective of Obtaining Rare Earth Elements in Poland

Non-dispersive solvent extraction of p-toluic acid from purified terephthalic acid plant wastewater with p-xylene as extractant

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