Separation of hafnium and zirconium using TBP modified ferromagnetic nanoparticles: Effects of acid and metals concentrations

Aliakbari, M.; Saberyan, Kamal; Noaparast, Mohammad; Abdollahi, Hadi; Akçıl, Ata

doi:10.1016/j.hydromet.2014.03.002

Cited by 11 publications

(3 citation statements)

References 12 publications

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“…Numerous solvent extraction studies were carried out to investigate zirconium extraction from various solutions, such as organic phosphorus compounds such as TBP (Aliakbari et al 2014 ), TOPO (Banda et al 2013 ), TRPO (trialkylphosphine oxide) (Xu et al 2012 ), CYANEX 301 and 302 (Saberyan et al 2008 , 2010 ), CYANEX 272 (Taghizadeh et al 2009 ), CYANEX 923 (Taghizadeh et al 2011 ), CYANEX 921 (El Shafie et al 2014 ), amines (Lakshmanan et al 2014 ), and D 2 EHPA (Taghizadeh et al 2009 ; De Beer et al 2016 ). All these mentioned solvents showed good results for zirconium recovery.…”

Section: Introductionmentioning

confidence: 99%

Zirconium preconcentration from zircon raffinate using gamma radiation–induced polymerization of reduced graphene oxide composite

Ali

Abdo

El-Shazly

2023

Environ Sci Pollut Res

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Zirconium is commonly used as a cladding material for nuclear reactors. The purity of the zirconium material seeks to control reactor efficiency. A novel composite of reduced graphene oxide–grafted polyacrylic acid, malic acid, and trioctylamine (rGO-g-PAA-MA/TOA) was prepared using in situ radical polymerization with gamma radiation at a dose of 25 KGy from a 60Co cell to preconcentrate zirconium Zr(IV) from zircon raffinate. Five distinct rGO-g-PAA-MA/TOA composite compositions were created and evaluated. The best composite composition was 62.95% acrylic acid, 15.8% malic acid, and 15.8% trioctylamine. After 60 min, the sorption reaction reached equilibrium at pH 0.35 and 20 °C. The pseudo nth order indicated that the order of the sorption reaction was 1.8476. The Elovich model and Dubinin-Radushkevich model controlled the kinetic mechanism and adsorption isotherm of the sorption reaction, respectively; based on estimated regression plots and quantitatively with three different error functions: coefficient of determination (R2), chi-square statistic (χ2), and corrected Akaike information (AICc). The adsorption capacity of rGO-g-PAA-MA/TOA was 75.06 mg g−1. Exothermic reaction and spontaneous sorption took place. Using 2 M H2SO4, 98% of the zirconium was efficiently desorbed. The separation of contaminated Ti(IV) from desorbed Zr(IV) by raising pH to 2.5 through hydrolysis and ZrO2 formation.

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Section: Introductionmentioning

confidence: 99%

Zirconium preconcentration from zircon raffinate using gamma radiation–induced polymerization of reduced graphene oxide composite

Ali

Abdo

El-Shazly

2023

Environ Sci Pollut Res

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“…Many solvent extraction investigations were carried out for extracting zirconium from different solutions as, organophosphorus compounds includes TBP (Aliakbari et al 2014), TOPO (Banda et al 2013), TRPO (trialkylphosphine oxide) (Xu et al 2012), Cyanex301 and 302 (Saberyan et al 2008(Saberyan et al , 2010, Cyanex272 (Taghizadeh et al 2009), Cyanex923 (Taghizadeh et al 2011), Cyanex921 (El Shafie et al 2014, amines (Lakshmanan et al 2014), D 2 EHPA (Taghizadeh et al 2009;De beer et al 2016) used Ionquest 801 to separate hafnium from zirconium these investigations showed a good results for extracting zirconium.…”

Section: Introductionmentioning

confidence: 99%

Production of highly purified zirconium oxide from zircon mineral leach liquor using bis-(2-ethylhexyl) phosphate as a promising extractant

Ali

2022

Chem. Pap.

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In this manuscript, efficiency of the used organic solvent for recovering, separating and producing highly purified zirconium oxide from zirconium chloride leach liquor of Rosetta white zircon concentrate was investigated. Zircon mineral was thermally decomposed with caustic soda, cooled, washed with distilled water and then dissolved in hydrochloric acid. Zirconium extraction efficiency reached 91.4% using 10% bis-(2-ethylhexyl) phosphate dissolved in kerosene, 15 min contact time and volume phase ratio O/A 1:1 after 3 stages. Zirconium re-extraction efficiency reached 99.95% using the following optimum conditions 4 molL−1 H2SO4 as an effective stripping agent, 15 min contact time and volume phase ratio O:A 1:1 after 2 stages. Finally, Zr (OH)4 was precipitated in presence and absence of H2O2 by NH4OH solution, filtrated, rinsed with double distilled H2O to remove any impurities several times and dehydrated at 200 °C for 2 h. From XRF and EDAX analysis the produced zirconium oxide in presence of H2O2 is purer than that produced in absence of H2O2.

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“…Solvent extraction of TBP has been carried out by previous researchers since 1955 by Cox et al [6]. But in the past few years, it turned out that TBP was also still used by Pandey et al [7], Banda et al [8] and Aliakbari et al [9], with various modifications. However, research on the optimization and kinetics of Zr (Hf) nitrate as a feed, from the results of ZOC dissolution is still rare.…”

Section: ■ Introductionmentioning

confidence: 99%

Optimization and Kinetics of Zirconium Oxychloride (ZOC) Dissolution Using HNO<sub>3</sub>

Purwani¹,

Muzakky²

2019

Indones. J. Chem.

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The design of chemical reactor can not be separated from the optimization data and reaction kinetics obtained from the experimental measurement. Through the idea of making the dissolution reactor design, the purpose of this research is to obtain optimization data and dissolution kinetics of Zirconium Oxide Chloride (ZOC) using HNO3. The design of the solvent reactor is required to make the feedstock in the liquid-liquid extraction process continuously. The extraction process is a mini-pilot plant unit as a nuclear-grade zirconia manufacture. The dissolution optimization was carried out by dissolving ZOC solids of zircon sand processed products using HNO3 in a container with some variation of contact time, HNO3 concentration and temperature. While the kinetics data was gained by extracting from the optimization data obtained based on the formula of reaction orders. The investigation result with 6 gr of ZOC and 6M HNO3 concentration obtained the best contact optimum time of 2 minutes and the conversion number (α) of 0.96. The dissolution reaction mechanism was estimated in accordance with the reaction of order 1 with the k value of 1.5879 minutes-1. It was predicted that the reaction mechanism of ZOC dissolution in HNO3 begins with diffuse control and is followed by chemical reaction control. With increasing conversion temperature, the conversion will increase to 0.98, while the reaction also follows the reaction order 1. The optimum temperature at 60 °C, and the correlation between temperature (T) with the calculated reaction rate constant (k) according to the Arrhenius formula yielded an equation of ln k = - 4191,6 / T + 13,903 or k = 13,903.e- 4191,6 / T, with the frequency factor A = 1091430 and the activation energy E = 34,848 kJ / mole.

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Separation of hafnium and zirconium using TBP modified ferromagnetic nanoparticles: Effects of acid and metals concentrations

Cited by 11 publications

References 12 publications

Zirconium preconcentration from zircon raffinate using gamma radiation–induced polymerization of reduced graphene oxide composite

Zirconium preconcentration from zircon raffinate using gamma radiation–induced polymerization of reduced graphene oxide composite

Production of highly purified zirconium oxide from zircon mineral leach liquor using bis-(2-ethylhexyl) phosphate as a promising extractant

Optimization and Kinetics of Zirconium Oxychloride (ZOC) Dissolution Using HNO<sub>3</sub>

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