Adsorption of Ce(IV) Anionic Nitrato Complexes onto Anion Exchangers and Its Application for Ce(IV) Separation from Rare Earths(III)

Jelínek, Luděk; Wei, Yuezhou; Kumagai, Mikio

doi:10.1016/s1002-0721(06)60129-4

Cited by 37 publications

(8 citation statements)

References 17 publications

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“…They play different roles in the removal of impurities. However, some of them have the disadvantages of using heterogeneous reactions or distribution of substances among different phases, which are the phenomena controlled by diffusion, requiring usually large operating times . Moreover, they are often inadequate to possess high power or chemical consumption, generate sludge or solid waste, etc …”

Section: Introductionmentioning

confidence: 99%

“…However, some of them have the disadvantages of using heterogeneous reactions or distribution of substances among different phases, which are the phenomena controlled by diffusion, requiring usually large operating times. [4,6] Moreover, they are often inadequate to possess high power or chemical consumption, generate sludge or solid waste, etc. [2] In recent years, complexation-ultrafiltration process (CUFP) has been shown to be a feasible method for metal ion separation from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, cerium oxide is an important component of glass polishing powders and phosphors used in screens and fluorescent lamps . The recovery methods of cerium(III) in aqueous media include mainly chemical precipitation, extraction, adsorption, electrochemical process, etc. They play different roles in the removal of impurities.…”

Section: Introductionmentioning

confidence: 99%

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Recovery of cerium(III) from aqueous solutions by complexation—ultrafiltration process

Zeng

Zhou

et al. 2012

Asia-Pacific J Chem Eng

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Complexation–ultrafiltration process was investigated for cerium(III) recovery from aqueous solutions by using poly (acrylic acid) sodium salt (PAASS) as a complexing agent. The adsorption of cerium(III) on PAASS was preliminarily studied at different pH values. Next, effects of pH, polymer metal ratio (PMR), calcium(II) and competitive complexing agents on permeate flux (J) and cerium rejection coefficient (R) were investigated in the total recirculation mode. Finally, the integrations of four experiments including concentration, decomplexation, regeneration of PAASS and reuse of regenerated PAASS were carried out. Obtained results show that the adsorption can be described well using the Langmuir equation. If pH is reduced below 4, J decreases rapidly. PMR has negligible effect on J. R increases with increasing pH or PMR. Calcium(II) and ethylenediaminetetraacetic acid disodium salt have the effects on R, but these effects can decrease by increasing pH. Tartrate sodium does not influence R. In the process of concentration, J declines slowly, and R is about 1. It takes 40 min to reach the decomplexation equilibrium at pH 3. The decomplexation percentage of cerium(III)–PAASS complex is about 70%. In the regeneration of PAASS, cerium(III) can be removed effectively, and the purification of regenerated PAASS is acceptably satisfactory. The binding capacity of regenerated PAASS is close to that of fresh PAASS, and the recovery percentage of binding capacity is higher than 90%. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recovery of cerium(III) from aqueous solutions by complexation—ultrafiltration process

Zeng

Zhou

et al. 2012

Asia-Pacific J Chem Eng

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“…It is also necessary to develop a method for the separation and recovery of rare earth metals. Several conventional methods, such as chemical precipitation, 2,3 reverse osmosis, 4 adsorption, 5 ion exchange, 6 solvent extraction 7,8 and liquid membrane (LM) [9][10][11][12] have been developed for these purposes. Among these methods, solvent extraction is the most common method and the liquid membrane is a kind of methods on the basis of solvent extraction.…”

Section: Introductionmentioning

confidence: 99%

Transport of Tb³⁺in Dispersion Supported Liquid Membrane System with Carrier P507

Pei¹,

Yao²,

Wang³

et al. 2010

Chin. J. Chem.

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The Tb 3＋ transport in dispersion supported liquid membrane (DSLM) consisting of polyvinylidene fluoride membrane (PVDF) as the liquid membrane support and dispersion solution including HCl solution as the stripping solution and 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester (P507) dissolved in kerosene as the membrane solution, has been studied. The effects of pH value, initial concentration of Tb 3＋ and different ionic strength in the feed phase, volume ratio of membrane solution and stripping solution, concentration of HCl solution, concentration of carrier, different stripping agents in the dispersion phase on transport of Tb 3＋ has also been investigated, respectively. As a result, the optimum transport conditon of Tb 3＋ was that concentration of HCl solution was 4.0 mol/L, concentration of P507 was 0.10 mol/L, and volume ratio of membrane solution and stripping solution was 1.0 in the dispersion phase, and pH value was 5.2 in the feed phase. Ionic strength had no obvious effect on transport of Tb 3＋ . Under the optimum condition studied, when initial concentration of Tb 3＋ was 1.0×10 -4 mol/L, the transport rate of Tb 3＋ was up to 95.2% during the transport time of 95 min. The kinetic equation was developed in terms of the law of mass diffusion and the theory of interface chemistry. The results were in good agreement with the literature data.Keywords dispersion supported liquid membrane, dispersion phase, feed phase, 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester, Terbium

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“…It is also necessary to develop a method for the separation and recovery of rare earth metals. Several conventional methods, such as chemical precipitation [2,3] , reverse osmosis [4] , adsorption [5] , ion exchange [6] , and solvent extraction [7,8] have been developed for these purposes, encountering various difficulties [1][2][3] . More efficient and low-cost removal and recovery methods are needed to develop to overcome these difficulties.…”

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confidence: 99%

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

Pei

Wang

2011

Journal of Rare Earths

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Adsorption of Ce(IV) Anionic Nitrato Complexes onto Anion Exchangers and Its Application for Ce(IV) Separation from Rare Earths(III)

Cited by 37 publications

References 17 publications

Recovery of cerium(III) from aqueous solutions by complexation—ultrafiltration process

Recovery of cerium(III) from aqueous solutions by complexation—ultrafiltration process

Transport of Tb³⁺in Dispersion Supported Liquid Membrane System with Carrier P507

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

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Adsorption of Ce(IV) Anionic Nitrato Complexes onto Anion Exchangers and Its Application for Ce(IV) Separation from Rare Earths(III)

Cited by 37 publications

References 17 publications

Recovery of cerium(III) from aqueous solutions by complexation—ultrafiltration process

Recovery of cerium(III) from aqueous solutions by complexation—ultrafiltration process

Transport of Tb3+ in Dispersion Supported Liquid Membrane System with Carrier P507

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

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Transport of Tb³⁺in Dispersion Supported Liquid Membrane System with Carrier P507