Separation of Eu(III) with supported dispersion liquid membrane system containing D2EHPA as carrier and HNO3 solution as stripping solution

Pei, Liang; Wang, Liming; Yu, Guoqiang

doi:10.1016/s1002-0721(10)60394-8

Cited by 32 publications

(3 citation statements)

References 33 publications

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“…Currently, membrane strategies for REEs separation are mainly classified into two types: liquid membranes and solid membranes ( Chen et al., 2018 ). During the last few decades, liquid membranes demonstrate efficient permeation and separation performances toward metal ions on account of its large mass transfer interfacial areas ( Anitha et al., 2013 ; Kim et al., 2016 ; Pei et al., 2011 ), but it got no breakthrough in scale-up experiments due to poor stability. In this regard, solid membranes are more promising because the solid ones are more stable, and suitable for industrial applications ( Chen et al., 2018 ).…”

Section: Resultsmentioning

confidence: 99%

Nitrogen-doped nanoporous graphene induced by a multiple confinement strategy for membrane separation of rare earth

et al. 2021

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Summary Rare earth separation is still a major challenge in membrane science. Nitrogen-doped nanoporous graphene (NDNG) is a promising material for membrane separation, but it has not yet been tested for rare earth separation, and it is limited by multi-complex synthesis. Herein, we developed a one-step, facile, and scalable approach to synthesize NDNG with tunable pore size and controlled nitrogen content using confinement combustion. Nanoporous hydrotalcite from Zn(NO 3 ) 2 is formed between layers of graphene oxide (GO) absorbed with phenylalanine via confinement growth, thus preparing the sandwich hydrotalcite/phenylalanine/GO composites. Subsequently, area-confinement combustion of hydrotalcite nanopores is used to etch graphene nanopores, and the hydrotalcite interlayer as a closed flat nanoreactor induces two-dimensional space confinement doping of planar nitrogen into graphene. The membrane prepared by NDNG achieves separation of Sc 3+ from the other rare earth ions with excellent selectivity (∼3.7) through selective electrostatic interactions of pyrrolic-N, and separation selectivity of ∼1.7 for Tm 3+ /Sm 3+ .

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Section: Resultsmentioning

confidence: 99%

Nitrogen-doped nanoporous graphene induced by a multiple confinement strategy for membrane separation of rare earth

et al. 2021

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“…Removal of these contaminants from waste waters is dictated by environmental constraints and there is an incentive to reduce the cost of water treatment which is usually carried out biologically although resin adsorption can be used for the removal of phenol [59]. Separation and recovery of copper [35,74], zinc [15,16], nickel [20,21], precious metals [75,76], rare earth metals [36,77,78], alkali metals [18], and so forth, from aqueous solutions using SLM have been extensively studied.…”

Section: Hydrometallurgical and Wastementioning

confidence: 99%

Supported Liquid Membrane Principle and Its Practices: A Short Review

Parhi

2012

Journal of Chemistry

186

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The present paper on the supported liquid membrane (SLM) deals with the general principles and applications, followed by the uphill transportation characteristic of SLM. The liquid-liquid extraction with supported liquid membrane is one of the best alternate and promising technologies for the extraction of metal ions from solutions over other hydrometallurgical separation processes. The salient features of the supported liquid membrane (SLM) technique such as simultaneous extraction and stripping, low solvent inventory, process economy, high efficiency, less extractant consumption, and operating costs are discussed in detail. The supported liquid membrane of hollow fiber type provides high interfacial surface area for achieving maximum metal flux. Also the use of different organic extractants for SLM has been discussed.

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“…Many authors studied the transport of species through the supported liquid membrane containing different carriers with related mathematical models to explain the mechanism of transport. In most of these studies, the models were derived by assuming the steady‐state conditions and linear concentration gradient throughout the membrane …”

Section: Introductionmentioning

confidence: 99%

Facilitated transport of Europium through supported liquid membrane using Cyanex272 as carrier and mass transfer modelling

et al. 2016

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In this study, the extraction of europium from nitric acid solution by a flat sheet supported liquid membrane using Cyanex272 as a carrier was investigated. The influence of effective parameters on the extraction of Eu was studied and the optimum conditions were derived. Then a theoretical model was developed for unsteady‐state transport of Eu ions through the supported liquid membrane. In this model, the variation of carrier concentration in the membrane phase was taken into account. The partial and complete differential equations obtained for the feed, membrane, and stripping phases were numerically solved and the results were compared with the experimental data. The verified model was used to simulate the concentration distribution of the metal‐carrier complex and carrier as a function of position and time in the membrane phase. Using the results of numerical solution, the derived equations were also solved analytically.

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Separation of Eu(III) with supported dispersion liquid membrane system containing D2EHPA as carrier and HNO3 solution as stripping solution

Cited by 32 publications

References 33 publications

Nitrogen-doped nanoporous graphene induced by a multiple confinement strategy for membrane separation of rare earth

Nitrogen-doped nanoporous graphene induced by a multiple confinement strategy for membrane separation of rare earth

Supported Liquid Membrane Principle and Its Practices: A Short Review

Facilitated transport of Europium through supported liquid membrane using Cyanex272 as carrier and mass transfer modelling

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