Separation of thorium and uranium in nitric acid solution using silica based anion exchange resin

Chen, Yanliang; He, Liang; Tang, Fangqiong

doi:10.1016/j.chroma.2016.09.010

Cited by 37 publications

(6 citation statements)

References 14 publications

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“…where K f (mg/g) is Th(IV) adsorption equilibrium constant, n is Freundlich constant related to the intensity, C e (mg/L) is equilibrium concentration of thorium ions, and q e (5) log q e = log K f + 1 n log C e (mg/g) is Th(IV) equilibrium adsorption capacity on nanosilica, PSA, and PSA/silica composites. Langmuir isotherm assumed that the adsorption/binding of Th(IV) from solution was emerged on the homogenous surface through saturated monolayer adsorption on nano-silica, PSA, and PSA/silica surface at permanent adsorption energy.…”

Section: Initial Th(iv) Concentrationmentioning

confidence: 99%

“…A set of technologies were forerun to separate thorium ions from its solutions, and these methods were chemical precipitation [4], ion exchange [5,6], liquid-liquid extraction [7][8][9], and adsorption [10][11][12]. Amongst these techniques, adsorptions are typical extensively utilized for separating heavy and radioactive metal ions on laboratory and industrial scales, because this method is low-cost, environmentally compatible and very efficient [13].…”

Section: Introductionmentioning

confidence: 99%

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Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

Cheira

2020

SN Appl. Sci.

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A new composite of poly sulfonamide/nano-silica composite (PSA/silica) was synthesized from the polymerization of sulfonamide in the presence of the prepared nano-silica. The prepared nano-silica, poly sulphonamide (PSA), and PSA/ silica composites were utilized for Th(IV) adsorption from sulfate solution. These composites described by XRD, surface area analysis, SEM-EDX, and FT-IR techniques. The influence parameters on the Th(IV) adsorption were pH solution, ionic strength, contact time, adsorbent dose, Th(IV) concentration, and temperature besides the coexisting ions. At best parameters (pH4, 0.1 g adsorbent amount, and 45 min contact time), 200 mg/L Th(IV) ions were quantitatively adsorbed from 100 mL solution. The maximum uptake capacities of the nano-silica, PSA, and PSA/silica composites attained 122, 75, and 197 mg/g at 298 K. From the kinetic and equilibrium data were found to the adsorption processes of three composites fitted well with kinetic model of pseudo-second-order and Langmuir adsorption isotherm model. Thermodynamic studies resulted that negative values for ∆H° indicated an exothermic while positive values ∆S° showed random behavior for Th(IV) adsorption, while negative values of ∆G° indicated spontaneous Th(IV) adsorption. The maximum Th(IV) desorption from the loaded adsorbents performed by 0.1 M/L HCl.

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Section: Initial Th(iv) Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

Cheira

2020

SN Appl. Sci.

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“…Therefore, selective extraction of thorium have attracted significant attention to eliminate radioactive pollution [4]. For this purpose, various techniques such as liquid-liquid extraction [5,6] extraction chromatography [7,8], functionalized resins [9,10], different adsorbents [11,12] and ion imprinted polymers [13][14][15][16][17] have been applied for the selective extraction of thorium and other rare earth ions.…”

Section: Introductionmentioning

confidence: 99%

Selective Separation and Preconcentration of Thorium(IV) in Bastnaesite Ore Using Thorium(IV)-Imprinted Cryogel Polymer

Dolak

2018

HJBC

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B u çalışmada, Th(IV)-baskılı Polimerler kullanılarak çeşitli lantanid iyonlarının varlığında sulu çözeltilerde ve bastnaesit cevherinde Th(IV) iyonunun seçici olarak ayrılması ve önderiştirilmesi gerçekleştirildi. Bu amaçla, Th(IV), N-metakriloil antipirin (MAAP) ile kompleksleştirildi ve hazırlanan (MAAP)2-Th(IV) kompleks monomer, serbest radikal polimerizasyon yöntemiyle 2-hidroksietil metakrilat (HEMA) kriyojel ile etkileştirilerek pHEMA-(MAAP)2-Th(IV) kriyojel polimeri hazırlandı. Th(IV), 5.0 mol.L -1 HNO3 ile desorbe edildi ve böylece Th(IV) baskılı p-HEMA-(MAAP)2 kriyojel polimeri oluşturuldu. Th(IV) iyonunun Th(IV)-baskılı p-HEMA-(MAAP)2 kriyojel polimere seçici olarak bağlanması işleminde optimum koşulları belirlemek için pH, akış hızı, başlangıç Th(IV) konsantrasyonu gibi bazı parametreler araştırıldı. Belirlenen bu optimum koşullar altında, maksimum bağlanma kapasitesi 48.30 mg.g -1 olarak tespit edildi. Seçicilik çalışmaları da, Th(IV)-baskılı p-HEMA-(MAAP)2 kriyojel polimer kullanılarak Ce(III), La(III) and Eu(III) iyonlarının varlığında gerçekleştirildi. p-HEMA-(MAAP)2 kriyojel polimer, Th(IV) iyonuna karşı yüksek seçicilik gösterdiği bulundu. Anahtar KelimelerTh(IV)-baskılı polimer, p-HEMA-(MAAP)2, ayırma, önderiştirme.

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“…Uranium is used in the nuclear fuel industry (Hore-Lacy, 2016) and it can be applied in electronic industries, semiconductors (Adamska et al, 2015;Bacci et al, 1989), catalysis (Amrute et al, 2013;Dong et al, 2015) and alloys (Ahn et al, 2016;Ghoshal et al, 2014). Given the importance of uranium, many chemical methods have been utilized for the recovery and separation of uranium such as solvent extraction (Ahn et al, 2016;Dartiguelongue et al, 2016;Zhu et al, 2016;Ghoshal et al, 2014), ionic exchange resins, (Chen et al, 2016;Ogden et al, 2017), adsorption over modified adsorbent (Gajowiak et al, 2013;Grabias et al, 2013), liquid emulsion membrane (Biswas et al, 2012;El Sayed, 2003), chelating resin (Donia et al, 2009;Ilaiyaraja et al, 2017), ion inclusion membranes (Kolev et al, 2013;St John et al, 2012) and AC sorption (Afsari et al, 2012;Yakout et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and application of composite derived from rice husk ash with aluminium oxide for sorption of uranium

Youssef

Hagag

Ali

2018

Adsorption Science & Technology

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A composite of rice husk (RH), caustic soda and aluminium oxide was synthesized at 500 C. The activated carbon and amorphous silica dispersed over the aluminium oxide selectively adsorbed uranium in the presence of other elements. At equilibrium time 1 h, phase ratio S/L (0.1 g/10 ml), pH ¼ 5 and uranium initial concentration 120.6 mg/l uranium adsorption efficiency was 96.35%. The uranium stripping efficiency from the load RHA-alumina composite fulfilled 99.9% at 1 h equilibrium time, a phase ratio (S/A) of 0.05 g/10 ml and 0.5 mol/l HNO 3 . The scanning electron microscopy photos revealed that the rice husk ash (RHA)-alumina composite has vacant or regular cavities before the adsorption, and the cavities are fully occupied by uranium after adsorption. The Fourier transform infrared spectroscopy shows a more broadening of the band t ¼ 3526 and 3462 cm À1 which was ascribed to the uranium adsorption. The composite adsorbed 93.75% of uranium from a waste sample. The uranium adsorption exhibited a Langmuir isotherm.

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Separation of thorium and uranium in nitric acid solution using silica based anion exchange resin

Cited by 37 publications

References 14 publications

Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

Performance of poly sulfonamide/nano-silica composite for adsorption of thorium ions from sulfate solution

Selective Separation and Preconcentration of Thorium(IV) in Bastnaesite Ore Using Thorium(IV)-Imprinted Cryogel Polymer

Synthesis, characterization and application of composite derived from rice husk ash with aluminium oxide for sorption of uranium

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