Separation of europium, cobalt and zinc on zirconium tungstate ion exchanger

El-Khouly, S. H.

doi:10.1007/s10967-006-0362-8

Cited by 34 publications

(10 citation statements)

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“…Hitherto, the techniques for the removal of Cs + and Sr 2+ ions mainly include solvent extraction, membrane filtration, precipitation, adsorption, ion exchange, etc. − Among them, the ion exchange method is promising due to its convenience, less secondary pollution, and an effective decrease in solid waste volume. , Traditional inorganic ion exchangers such as zeolites, , ferrous metal cyanide compounds, , heteropoly acid salts, and titanium silicate − have been studied for the removal of Cs + and Sr 2+ ions. However, their performances are greatly reduced under acidic conditions.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Jin

Zhang

et al. 2021

ACS EST Water

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137 Cs + and 90 Sr 2+ are highly soluble, highly environmentally mobile, and strongly radiotoxic. Efficiently sequestering 137 Cs + and 90 Sr 2+ ions from aqueous solutions remains a serious challenge, especially from acidic environments because of the effects of protonation and poor stabilities of materials. Here, efficient removal of Cs + and Sr 2+ ions is achieved by a layered thiostannate, namely [(EtNH 3 ) 1.68 (Et 2 NH 2 ) 0.32 ]Sn 3 S 7 •0.68H 2 O (FJSM-SnS-4), which exhibits excellent acid−base and β and γ irradiation resistances. FJSM-SnS-4 possesses high maximum adsorption capacities and rapid kinetics for Cs + and Sr 2+ ions under neutral conditions. It can even capture Cs + ions under acidic conditions (e.g., pH 1.6 and 0.4). It is interesting that FJSM-SnS-4 has excellent selectivity for Sr 2+ ions in neutral environments, whereas it prefers capturing Cs + from 1 M HCl solutions with coexisting K + , Na + , Ca 2+ , Mg 2+ , and Sr 2+ ions. The Cs + and Sr 2+ adsorption mechanism has been revealed at the molecular level by single-crystal structural analysis coupled with XPS, EXAFS, and EA characterization, that is, ion exchange between Cs + and Sr 2+ ions and protonated organic amines in interlayer space owing to the flexibility of the current layered thiostannate framework and the strong affinity of the soft basic S 2− of the framework for Cs + and Sr 2+ ions.

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Section: Introductionmentioning

confidence: 99%

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Jin

Zhang

et al. 2021

ACS EST Water

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“…By contrast, the adsorption and ion exchange are quite promising owing to easily operation, low cost, little second pollution, and effective reduction of the volume of solid wastes . Traditional inorganic adsorbents, such as zeolite, graphene oxide (GO), and heteropoly acid salts have been deeply investigated; however, the disadvantages such as poor selectivity, narrow pH range and inability to separate lanthanides from multi‐ion mixed solutions stunt their further applications . Thus, it is important to develop new absorbent materials for the recovery of lanthanides from radioactive wastes.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Recovery of Lanthanides by Using a Layered Vanadate with Acid and Radiation Resistance

et al. 2019

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It is of vital importance to capture lanthanides (nuclear fission products) from waste solutions for radionuclide remediation owing to their hazards. The effective separation of lanthanides are achieved by an acid/base‐stable and radiation‐resistant vanadate, namely, [Me2NH2]V3O7 (1). It exhibits high adsorption capacities for lanthanides (qmEu=161.4 mg g−1; qmSm=139.2 mg g−1). And high adsorption capacities are maintained over a pH range of 2.0–6.9 (qmEu=75.1 mg g−1 at low pH of 2.5). It displays high selectivity for Eu3+ (simulant of An3+) against a large excess of interfering ions. It can efficiently separate Eu3+ and Cs+ (or Sr2+) with the highest separation factor SFEu/Cs of 156 (SFEu/Sr of 134) to date. The adsorption mechanism is revealed by calculations and XPS, EXAFS, Raman, and elemental analyses. These merits combined with facile synthesis and convenient elution makes the title vanadate a promising lanthanide scavenger for environmental remediation.

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“…Although the removal of europium from different mixtures is usually carried out by solvent extraction [15][16][17][18][19] or ion exchange [20][21][22][23][24][25], both methodologies make use of large amounts of harmful chemical substances. Therefore, the use of adsorption processes in the recovery of Eu(III) from wastewater is considered to be advantageous and it has been explored by various research groups as an alternative towards this purpose [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

β-ketoester-functionalized magnetoactive electrospun polymer fibers as Eu(III) adsorbents

et al. 2018

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Blended polymer fibers based on a hydrophobic random copolymer having β-ketoester metal ion binding functionalities namely poly(methyl methacrylate)-random-poly(2-(acetoacetoxy) ethyl methacrylate) (PMMA-co-PAEMA) and the hydrophilic polyethylene oxide (PEO) were fabricated by electrospinning and further evaluated for the first time as adsorbents for the removal of Eu(III) from aqueous media. Moreover, magnetoactive fibrous analogues were prepared by incorporating preformed, oleic-acid coated Fe 3 O 4 NPs within the polymer fibers during electrospinning. The Eu(III) adsorption was investigated as a function of pH and initial metal ion concentration whereas the effect of the Fe 3 O 4 NPs and of the β-ketoester groups on the membrane adsorption efficacy was also investigated. The experimental data, which were well fitted by the Langmuir isotherm model, indicated increased affinity with increasing pH and reached maximum values (~ 95%) at pH 6.5. The presence of the β-ketoester functionalities as well as the incorporation of the Fe 3 O 4 nanoparticles within the fibrous adsorbents affect positively the adsorption process and indicate the significance of chemical modification with respect to water purification and precious metal recovery using adsorbent-based technologies.

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Separation of europium, cobalt and zinc on zirconium tungstate ion exchanger

Cited by 34 publications

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Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Highly Selective Recovery of Lanthanides by Using a Layered Vanadate with Acid and Radiation Resistance

β-ketoester-functionalized magnetoactive electrospun polymer fibers as Eu(III) adsorbents

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Separation of europium, cobalt and zinc on zirconium tungstate ion exchanger

Cited by 34 publications

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Rapid and Selective Uptake of Cs+ and Sr2+ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Rapid and Selective Uptake of Cs+ and Sr2+ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Highly Selective Recovery of Lanthanides by Using a Layered Vanadate with Acid and Radiation Resistance

β-ketoester-functionalized magnetoactive electrospun polymer fibers as Eu(III) adsorbents

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Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances

Rapid and Selective Uptake of Cs⁺ and Sr²⁺ Ions by a Layered Thiostannate with Acid–Base and Irradiation Resistances