Green solvents in urban mining

Billard, Isabelle

doi:10.1016/j.cogsc.2018.11.013

Cited by 18 publications

(7 citation statements)

References 47 publications

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“…Before scaling up the technology in the form of hollow fiber modules, the investigation of a given system, using supported liquid membrane in flat-sheet configuration, is necessary in order to obtain information about the mass transfer process involved in the membrane operation. One important part, in real terms the key-of-the-operation, is the carrier used to transport the metals, and included in them, ionic liquids are a group of chemicals, which properties make of them to be considered as green solvents, and among other uses [15][16][17][18] suitable for the removal of metals from aqueous solutions [19][20][21][22][23][24][25][26][27][28] .…”

Section: Introductionmentioning

confidence: 99%

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

López¹

2020

Preprint

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The transport of indium(III), from HCl solutions, across a supported liquid membrane in flat-sheet configuration was investigated, being the carrier the ionic liquid HA324H+Cl- (derived from the tertiary amine Hostarex A324 and hydrochloric acid). Different variables affecting the metal transport: hydrodynamic conditions in the source and receiving phases, metal and HCl concentrations in the source phase, and carrier concentration in the membrane phase, were investigated. Also the transport of indium(III) using carriers of various nature: ionic liquids, alcohol, ketone, phosphine oxide and phosphoric ester, was compared. The metal transport was modelled describing the transport mechanism as: diffusion across the source diffusion layer, a fast interfacial chemical reaction, and diffusion of the InCl4--carrier complex through the membrane support. Diffusional parameters for the transport of indium(III), from the experimental data and the model, were estimated.

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Section: Introductionmentioning

confidence: 99%

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

López¹

2020

Preprint

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“…The key of the operation is the carrier used to transport the metals, and ionic liquids are such carriers. Ionic liquids are a group of chemicals whose properties identify them as green solvents, which among other uses [18][19][20] , makes them suitable for the removal of metals from aqueous solutions [21][22][23][24][25][26] .…”

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confidence: 99%

Dispersion-free extraction of In(III) from HCl solutions using a supported liquid membrane containing the HA324H+Cl− ionic liquid as the carrier

López

2020

Sci Rep

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By reaction of HCl and the tertiary amine HA324, an ionic liquid denoted HA324H + cl − was generated and used in the transport of indium(iii) from Hcl solutions. Metal transport experiments were carried out with a supported liquid membrane, and several variables affecting the permeation of indium(III) across the membrane were tested: stirring speed, metal and acid concentrations in the feed solutions and the carrier concentration in the supported organic solution. the metal transport results were also compared with those obtained using different carriers in the solid support. A model that described indium(III) transport across the membrane was proposed, and the corresponding diffusional parameters were estimated.

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“…Including in the organic extractants used in liquid-liquid extraction, ionic liquids present a further interest due to their inherent properties [13,14], which make of them to be considered as green solvents. Ionic liquids had been amply used, in the recovery of metals, being some recent applications given in the literature, i.e.…”

Section: Introductionmentioning

confidence: 99%

Insight the Liquid-Liquid Extraction System AuCl4-/HCl/A327H+Cl- Ionic Liquid/Toluene

López¹

2021

Preprint

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The ionic liquid A327H+Cl- is generated by reaction of the tertiary amine A327 (industrial mixture of tri-octil and tri-decyl amines) and hydrochloric acid solutions. Further, the extraction of Au(III) by A327H+Cl- ionic liquid under various variables, including metal and ionic liquid concentrations, has been investigated. Results indicate that A327H+AuCl4- is formed, by an exothermic (ΔHº= -3 kJ/mol) reaction, in the organic solution. Aqueous ionic strength influences the formation constants values and the specific interaction theory (SIT) is used to estimate the interaction coefficient between AuCl4- and H+. Gold (III) is stripped using thiocyanate media, and from the strip solutions, gold is precipitated as gold nanoparticles.

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Green solvents in urban mining

Abstract: General considerations about urban mining and green solvents are first briefly discussed. Then, the use of green solvents in the recycling processes of technological objects present in urban mines is reviewed, focusing on metal recovery.

Cited by 18 publications

References 47 publications

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

Dispersion-Free Extraction of In(III) from HCl Solutions Using a Supported Liquid Membrane Containing HA324H+Cl- Ionic Liquid as Carrier

Dispersion-free extraction of In(III) from HCl solutions using a supported liquid membrane containing the HA324H+Cl− ionic liquid as the carrier

Insight the Liquid-Liquid Extraction System AuCl4-/HCl/A327H+Cl- Ionic Liquid/Toluene

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