On the use of imidazolium and ammonium-based ionic liquids as green solvents for the selective recovery of Zn(II), Cd(II), Cu(II) and Fe(III) from hydrochloride aqueous solutions

Ríos, Antonia Pérez de los; Hernández-Fernández, F.J.; Alguacil, Francisco José; Lozano, L. J.; Ginestá, A.; García‐Díaz, Irene; Sánchez-Segado, Sergio; López, Félix A.; Godı́nez, C.

doi:10.1016/j.seppur.2012.02.040

Cited by 73 publications

(39 citation statements)

References 51 publications

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“…Vidal 等 [14] 认为, 在 Cl -富集的情况下, Zn 2＋会以 ZnCl 4 2-, Cu 2＋会以 Cu 2＋、CuCl -、 CuCl 2 的形式存在于溶液中, 以阴离子形式存在的金属离子会与离子液体的阴离子部分进行交换, 从而实现金属离子的萃取. De los Ríos 等 [15,16] 一般而言, 如果金属离子与离子液体间的相互作用仅限于物理作用的范围, 则金属离子在离子液体中的溶解度必定非常低, 为了提高金属离子的去除效果必须增大离子液体的使用量. 然而, 无论是阳离子交换还是离子对交换, 都不可避免地造成离子液体进入到水相中, 造成水体的二次污染和离子液体的损失.…”

Section: 引言unclassified

Extraction of Copper from Aqueous Solution with Functional Ionic Liquids: Experiment and Theoretical Calculation

刘梦莹¹,

车佳宁²,

吴蔚闳³

et al. 2015

Acta Chim. Sinica

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This work studied the extraction of copper (II) ions from aqueous solution with thiourea-appended imidazolium hydrophobic ionic liquids and the extraction mechanism by experiment and theory. The influence of parameters affecting the extraction of copper ion, such as the metal ion concentrations, volume ratio between aqueous solution and ionic liquid, contact time, sodium chloride and pH, as well as alkyl chain length was analyzed. In the case of room temperature, the volume ratio between aqueous/IL phases was 50, the extraction efficiencies ＞95% could be obtained for copper ion with all the ionic liquids [C n MPSM][PF 6 ] (n＝4, 6, 8). The results also suggest that n＝4 did the same work on the extraction efficiency with n＝6 but higher than n＝8, while pH and the salt in the solution had little effect on the extraction efficiency for the extraction with [HMPSM][PF 6 ]. The grafted functional group significantly enhanced the extraction efficiency for Cu 2＋ from 20% to over 99% compared with traditional ILs. To the IL [HMPSM][PF 6 ], the content of imidazolium cation in the aqueous solution before and after extraction with functional IL reduces from 1.24% to 0.85% which means the coordination effect between functional group and the metal ion restrains the release of [HMPSM] ＋ cation from functional IL to the aqueous solution, while it increases from 0.63% to 0.87% for traditional IL, which is consistent with the results caused by the cation exchange mechanism. In the theory part, the lanl2dz-ECP basis set was employed for transition metal Cu, whereas for the remaining atoms 6-31G (d,p) was applied, cation-anion interaction energies of the ILs and the binding energies between Cu (II) ion and the ILs were calculated, also the surface properties most-negative-surface electrostatic potential (V s,min) and the lowest surface average local ionization energy (Ī s,min), were determined by the Multiwfn 2.4 program. All the calculation results show that the sulfur atom from cation is easier to attract the metal ion electrostatically and covalently, thus leads to the high efficiency of extraction.

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Section: 引言unclassified

Extraction of Copper from Aqueous Solution with Functional Ionic Liquids: Experiment and Theoretical Calculation

刘梦莹¹,

车佳宁²,

吴蔚闳³

et al. 2015

Acta Chim. Sinica

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“…ILs have been successfully employed as extraction agents for metal ions, organic compounds, and macromolecules and in liquid/liquid systems [4][5][6][7]. However, their immobilization in different kinds of matrixes provides a dual benefit: (i) to obtain stable materials with a minimal content of IL and (ii) the opportunity to reuse the IL at the end of the process.…”

Section: Introductionmentioning

confidence: 99%

On the Selective Transport of Nutrients through Polymer Inclusion Membranes Based on Ionic Liquids

et al. 2019

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In the last few years, the use of ionic liquid-based membranes has gained importance in a wide variety of separation processes due to the unique properties of ionic liquids. The aim of this work is to analyze the transport of nutrients through polymer inclusion membranes based on different concentrations of methyltrioctylammonium chloride, in order to broaden the application range of these kinds of membranes. Calcium chloride (CaCl2) and sodium hydrogen phosphate (Na2HPO4) nutrients were used at the concentration of 1 g·L−1 in the feeding phase. The evolution of the concentration in the receiving phase over time (168 h) was monitored and the experimental data fitted to a diffusion-solution transport model. The results show very low permeation values for CaCl2. By contrast, in the case of Na2HPO4 the permeation values were higher and increase as the amount of ionic liquid in the membrane also increases. The surface of the membranes was characterized before and after being used in the separation process by scanning electron microscopy coupled to energy dispersive X-Ray spectroscopy (SEM–EDX) and elemental mapping analysis. The SEM–EDX images show that the polymer inclusion membranes studied are stable to aqueous solution contacting phases and therefore, they might be used for the selective transport of nutrients in separation processes.

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“…Since zinc is mostly presented in the aqueous solutions generated from these recovery processes as Zn 2+ , the extractants used to extract the cation are, naturally, acidic or cationic reagents, and among them, alkylphosphorus derivatives are often used [1][2][3][4][5][6][7]. As in all general rules, and despite the earlier, there are exceptions and in the case of zinc(II) this occurs in the treatment of spent pickling solutions, in which, basic or solvation reagents had been proposed as extractants for the various neutral species and anionic zinc(II)-chloride complexes [8][9][10], whereas more recently, ionic liquids had been introduced as potential zinc extractants from this chloride and other aqueous media [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Zinc and iron removal from chromium(III) passivation baths by solvent extraction with Cyanex 272

Diban¹,

Urtiaga²

2018

Desalination and Water Treatment

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a b s t r a c tThe use of Cyanex 272 for extraction of zinc and iron from industrial wastes like chromium(III) passivation baths is investigated. The extraction of the metals is studied, in batch conditions, as a function of equilibration time, temperature, diluent of the organic solution, metals and extractant concentrations and pH values of the aqueous solutions. Also the stripping of the metals from loaded organic phases had been investigated using sulphuric acid solutions as strippant.

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On the use of imidazolium and ammonium-based ionic liquids as green solvents for the selective recovery of Zn(II), Cd(II), Cu(II) and Fe(III) from hydrochloride aqueous solutions

Cited by 73 publications

References 51 publications

Extraction of Copper from Aqueous Solution with Functional Ionic Liquids: Experiment and Theoretical Calculation

Extraction of Copper from Aqueous Solution with Functional Ionic Liquids: Experiment and Theoretical Calculation

On the Selective Transport of Nutrients through Polymer Inclusion Membranes Based on Ionic Liquids

Zinc and iron removal from chromium(III) passivation baths by solvent extraction with Cyanex 272

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