Extracting Cu(II) from aqueous solutions with hydrophobic room-temperature ionic liquid in the presence of a pyridine-based ionophore to attempt Cu recovery: A laboratory study

Hsu, Sodio C. N.; Su, Chung-Jui; Yu, Fu-Lun; Chen, Weijie; Zhuang, Ding-Xuan; Deng, Ming-Jay; Sun, I‐Wen; Chen, Po‐Yu

doi:10.1016/j.electacta.2008.09.068

Cited by 36 publications

(10 citation statements)

References 30 publications

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“…In the last decade, electrodeposition has been widely used for the purification and separation of metal ions. Many studies have reported the recovery of metals such as Cu, 22 Sr, 23 U, 24 Pt, 25 and Ru 26 through solvent extraction–direct electrodeposition. Compared with the conventional organic phase back-extraction method, direct electrodeposition can reduce the use of volatile organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Pd(II) from Hydrochloric Acid Medium by Solvent Extraction–Direct Electrodeposition Using Hydrophilic/Hydrophobic ILs

Shao

Jin

et al. 2020

ACS Omega

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Mixed [C 8 bet]Br/[C 4 mim][NTf 2 ] ionic liquids were used as a new extraction system to extract Pd(II) from multimetal-ion solutions. The separation factors K Pd/M (M: Cu, Fe, Ni, Zn, Co) are greater than 10 3 . Thiourea was found to be an effective stripping agent. After three cycles, the recovery efficiency was higher than 91.0%. Direct electrodeposition of palladium from the mixed ionic liquid phase was also studied. The Pd(II) complex in [C 8 bet]Br/[C 4 mim][NTf 2 ] system was studied by cyclic voltammetry at 348 K. The results indicate the existence of three types of Pd(II) complex in the [C 8 bet]Br/[C 4 mim][NTf 2 ] system, leading to three reductive waves. The reduction of Pd(II) to Pd(0) in this system is irreversible. A uniform black coating was obtained by constant-potential deposition at −1.7 V on a nickel foil, confirmed to be palladium metal by energy-dispersive spectrometry, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy analyses. After three cycles of continuous extraction–electrodeposition, over 90.0% of palladium was recovered.

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Section: Introductionmentioning

confidence: 99%

Recovery of Pd(II) from Hydrochloric Acid Medium by Solvent Extraction–Direct Electrodeposition Using Hydrophilic/Hydrophobic ILs

Shao

Jin

et al. 2020

ACS Omega

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“…The electrochemical reduction for the recovery of copper has been employed in our previous study. [10] All Cu II complexes in this study can be reduced to Cu metal. However, the efficiency depends on the water Figure 6.…”

Section: Voltammetric Behavior Of the Complexed Cu II Ions In The Ionmentioning

confidence: 85%

“…Keywords: copper · extraction · ionic liquid · reuse · selectivity of copper-containing metalloenzymes. [8] Considering the bioinorganic chemistry of copper, a series of N-alkyl-bis(pyridylethyl)amines such as N,N,N',N'-tetrakis(2-pyrid-2-ylethyl)1,4-butylenediamine(N4), which is a polypyridine-type ligand that has been used to form coordination compounds with Cu ions [9] and extract Cu II , [10] have been used as copper ionophores for establishing a copper extraction system. Herein, a common hydrophobic N-butyl-N-methylpyrrolidinium bis((trifluoromethyl)sulfonyl)amide ionic liquid (BMP-TFSA IL) with ionophores was used as the immiscible phase.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Cupric Ions with Ionic Liquids Containing Polypyridine‐type Small Molecules or Peripherally Pyridine‐modified Dendrimers

Tang

et al. 2012

Chemistry An Asian Journal

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The hydrophobic ionic liquid N-butyl-N-methylpyrrolidinium bis((trifluoromethyl)sulfonyl)amide (BMP-TFSA IL), which contains a series of flexible ionophores of polypyridine-type small molecules or two rigid ionophores of peripherally pyridine-modified PAMAM dendrimers, was used to extract cupric ions from aqueous solutions. The polypyridine-type ionophores show good selectivity toward cupric ions at pH 2. The selectivity is affected by the spacing between the two amino groups. However, the pyridine-modified dendrimers showed poor selectivity, although their extraction efficiency still depended on the pH of the aqueous solution. The ionic liquids that contained small molecular ionophores and their dendrimer analogs were reused after acid washing or electrochemical reduction. During acid washing, the nitrogen atoms of the ionophores were protonated to release the cupric ions into the aqueous phase, and the copper atoms were deposited onto the electrode surface during the electrochemical reduction accompanied by the regeneration of the ionophores.

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“…In literature, Cu(II) extraction in ionic liquids by differrent chelating agents has been already reported [10,11]. In our previous study [12], concerning the extraction of Hg(II) ions in ionic liquids in absence of chelating agent, the key role of both working temperature and ionic liquid hydrophobicity has been pointed out.…”

Section: Cu(ii) Extraction In Ionic Liquidsmentioning

confidence: 99%

Cu(II) Extraction in Ionic Liquids and Chlorinated Solvents: Temperature Effect

Germani¹,

Mancini²,

Spreti

et al. 2011

GSC

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Room temperature ionic liquids have been currently used in liquid/liquid extraction processes in order to substitute conventional organic solvents. In this paper, a series of chlorinated solvents and 1-alkyl-3-methylimidazolium-based ionic liquids were selected to study the extraction efficiency of a lipophilic polyamine 1,1,7,7-tetraethyl-4-tetradecyldiethylenetriamine (TE14DT) towards the model ion Cu(II) in such different media. The effect of temperature on the extraction efficiency was also investigated. The metal ion partition was found to be strongly dependent on both the nature of the solvent and on the working temperature. The viscosity of ionic liquids and the water content in ionic liquid were found to affect the extraction efficiency of TE14DT. The chemical nature of the cation of ionic liquids, and in particular the alkyl chain length on imidazolium ring, also seemed to be important in determining the efficiency of the extraction process. Finally, preliminary experiments on back-extraction of Cu(II) ions from ionic liquid also revealed interesting hints to the development of a continuous transport process.

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Extracting Cu(II) from aqueous solutions with hydrophobic room-temperature ionic liquid in the presence of a pyridine-based ionophore to attempt Cu recovery: A laboratory study

Cited by 36 publications

References 30 publications

Recovery of Pd(II) from Hydrochloric Acid Medium by Solvent Extraction–Direct Electrodeposition Using Hydrophilic/Hydrophobic ILs

Recovery of Pd(II) from Hydrochloric Acid Medium by Solvent Extraction–Direct Electrodeposition Using Hydrophilic/Hydrophobic ILs

Extraction of Cupric Ions with Ionic Liquids Containing Polypyridine‐type Small Molecules or Peripherally Pyridine‐modified Dendrimers

Cu(II) Extraction in Ionic Liquids and Chlorinated Solvents: Temperature Effect

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