Liquid–Liquid Equilibrium of Aqueous Two-Phase System Composed of Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Zakhodyaeva, Yu. A.; Rudakov, D. G.; Solov’ev, V. O.; Вошкин, А. А.; Тимошенко, А. В.

doi:10.1021/acs.jced.8b01138

Cited by 37 publications

(15 citation statements)

References 39 publications

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“…Traditionally, sulfuric, hydrochloric, and nitric acid solutions have been used in metal ion leaching from power source elements [27]. For the first time, this article studied the extraction of Ni(II), Co(II), Fe(III), Mn(II), Zn(II), Cu(II), and Al(III) from nitrate solutions in the aqueous two-phase systems based on poly(ethylene oxide) (PEO) 1500 which we proposed earlier [28]. The purpose of this work is to establish the interphase distribution regularities for a number of metals (Ni, Co, Fe, Mn, Cu, Zn, Al) in the PEO 1500-NaNO 3 -H 2 O extraction system.…”

Section: Introductionmentioning

confidence: 99%

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

et al. 2019

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This article presents an ecologically safe aqueous two-phase system based on poly(ethylene oxide) with a molecular weight of 1500, designed for complex extraction of Ni(II), Co(II), Fe(III), Mn(II), Zn(II), Cu(II), and Al(III) from nitrate solutions. A kinetic dependence has been investigated for a distribution ratio for the metals examined. The influence of pH-values, temperature, initial metal concentration, and nitric acid content have on the extraction of a wide range of metals in the heterogeneous poly(ethylene oxide) 1500-NaNO3-H2O system has been discovered. As a result, the complex extraction of metals (EMe > 60%) was achieved in one step of extraction without introducing additional chemicals into the system.

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Section: Introductionmentioning

confidence: 99%

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

et al. 2019

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“…The metal ions extraction was carried out using nitrate two-phase aqueous systems, based on polyethylene glycol 1500 and with an initial metal concentration of 0.01mol•L -1 . Phase composition were chosen based on phase diagrams, PEG-1500 -NaNO3 [34]. The acid concentration in the salt phase was equal 0.01mol•L -1 (for the hydrolyze avoiding).…”

Section: Methodsmentioning

confidence: 99%

Extraction of Eu(III), Gd(III), and Tb(III) in aqueous two-phase systems based on polyethylene glycol 1500-NaNO3-H2O with the addition of extractants (D2EHPA, TBP, TOMAN)

Fedorov

Левина

Fedorova

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Luminophores that used, for example, in fluorescent lamps, contain a large number of rare earth elements. Therefore, the processing of waste equipment containing luminophores is a rational approach to the obtaining of rare-earth metals, firstly, from the economics point of view, since they have a high cost, and secondly, from the ecological point of view, since environmental pollution will not occur. The cheapest way to extract rare earth elements from waste products is to dissolve them in strong acids and the following reprocessing by liquid extraction methods. In this case, neutral or ion exchange extractants (tributyl phosphate, di(2-ethylhexyl)phosphoric acid and quaternary ammonium salts) are used, which show high extraction ability and, in some cases, selectivity. Their applying is associated with the use of non-polar organic solvents, which contradicts the principles of «green» chemistry. A good and promising alternative to organic solvents can be aqueous two-phase systems, which have already proved themselves as low-toxic, but highly effective systems for the separation of a number of metals. Thus, in this work, we performed an experimental study of the interphase distribution of Eu(III), Gd(III), and Tb(III) in two-phase systems based on water-soluble polymers with or without the introduction of traditional organic extractants as an additive. The possibility of using such ATPS as a «green» solvent for traditional extragents for Eu(III), Gd(III), and Tb(III) extraction has been shown.

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“…Two-phase water systems based on water-soluble polymers and inorganic salts can be an effective replacement for classical extraction systems. [19][20]. So, a system based on poly(ethylene glycol) and polypropylene glycol has shown its effectiveness for the transition metal ions without complexing agents [21][22][23], and with the addition of traditional extragents: Aliquat 336 [24], trioctylmethylammonium thiocyanate [25], potassium thiocyanate [26].…”

Section: Introductionmentioning

confidence: 99%

Vanadium(IV) ions extraction in the aqueous two-phase system based on poly(ethylene glycol)

Левина

Fedorova

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Vanadium has found wide applications in various industries: metallurgy, electronics, batteries, and others. This element, being dispersed, does not form its minerals and, therefore, is mined along the way. An alternative approach of vanadium extraction is to separate it from heavy oil, by flushing the oil with strong acids solutions and further hydrometallurgical processing. The existing methods of oil dehydration solutions processing for the vanadium extraction are not perfect - they do not meet the “green” chemistry principles. Thus, we investigated V(IV) ions extraction in the aqueous two-phase system (ATPS) based on poly(ethylene glycol) 1500 (16.3wt%) – NaNO3 (36wt%) – H2O. The dependences of V(IV) extraction efficiency on phases time contact, and dependences V(IV) distribution coefficients on salt phase acidity have been obtained. This system is shown to be a prospective solution for the vanadium(IV) recovery from acidic waste steams problem as it is possible to extract vanadium with an efficiency of more than 81.6% per one extraction step (the distribution coefficient of vanadium (IV) was 4.84).

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Liquid–Liquid Equilibrium of Aqueous Two-Phase System Composed of Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Cited by 37 publications

References 39 publications

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Complex Extraction of Metals in an Aqueous Two-Phase System Based on Poly(Ethylene Oxide) 1500 and Sodium Nitrate

Extraction of Eu(III), Gd(III), and Tb(III) in aqueous two-phase systems based on polyethylene glycol 1500-NaNO3-H2O with the addition of extractants (D2EHPA, TBP, TOMAN)

Vanadium(IV) ions extraction in the aqueous two-phase system based on poly(ethylene glycol)

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