Emulsion Liquid Membranes for Wastewater Treatment: Equilibrium Models for Some Typical Metal-Extractant Systems

Raghuraman, B.; Tirmizi, Neena.; Wiencek, John M.

doi:10.1021/es00055a018

Cited by 67 publications

(46 citation statements)

References 19 publications

(31 reference statements)

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“…(4) as follows [22] 2 ] concentration result in greater extraction of copper. This is clear from the data presented in Fig.…”

Section: Effect Of D2ehpa Concentration In the Emulsionmentioning

confidence: 99%

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Zinc and Copper Separation through an Emulsion Liquid Membrane Containing Di‐(2‐Ethylhexyl) Phosphoric Acid as a Carrier

Fouad

2008

Chem Eng & Technol

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The separation of zinc and copper ions from sulfuric acid solutions by an emulsion liquid membrane (ELM), using di-(2-ethylhexyl) phosphoric acid (D2EHPA) as a carrier, has been investigated. The batch extraction of zinc and copper was carried out while varying a selection of experimental conditions, i.e., stirring speed, treatment ratio, concentrations of metal ions in the feed phase, carrier and Span 80 concentration in the membrane, and internal phase concentration. The results obtained demonstrate the effectiveness of D2EHPA as a carrier for the separation of zinc and copper from sulfuric acid media using an ELM. An increase of the D2EHPA concentration beyond 2 vol.-% does not result in the improved extraction of zinc because the viscosities of the membrane and emulsion have a trend to increase for higher carrier concentrations. It was found that the extraction rate of copper was affected by the carrier concentration in the liquid membrane and by the pH and metal content in the external phase. A 3 vol.-% concentration of surfactant in the organic phase was required to stabilize the emulsion. The number of stages required for the extraction of zinc and copper by an ELM was determined from McCabe-Thiele plots.

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“…(4) as follows [22] 2 ] concentration result in greater extraction of copper. This is clear from the data presented in Fig.…”

Section: Effect Of D2ehpa Concentration In the Emulsionmentioning

confidence: 99%

“…Electrochemical metal recovery is a promising technique. However, waste streams often have metal contents that are too low and have poor plating efficiencies [2]. There is a growing need for the development of an effective and efficient method for the removal and recovery of such metals from dilute solutions.…”

Section: Introductionmentioning

confidence: 99%

Zinc and Copper Separation through an Emulsion Liquid Membrane Containing Di‐(2‐Ethylhexyl) Phosphoric Acid as a Carrier

Fouad

2008

Chem Eng & Technol

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“…[16][17][18] The carrier in the liquid membrane phase plays an important role in the liquid membrane process, which must: (i) provide a very high extraction distribution coefficient from dilute solutions; (ii) react reversibly with the metal so that the metal can be recovered by a stripping reaction; (iii) have reasonably fast extraction and stripping kinetic; and (iv) have very low solubility in the aqueous phase for economic and environmental reasons. 19 There has been a number of papers dealing with Ag + transport through different liquid membrane configurations using various kinds of carriers. The choosing of the type of carrier is important in the design of metal separation.…”

Section: Introductionmentioning

confidence: 99%

Selective Transport of Silver(I) Cation Across a Bulk Liquid Membrane Containing Bis-β-enamino Ester as Ion Carrier

Tarahomi

Rounaghi

Daneshvar

et al. 2016

Journal of the Brazilian Chemical Society

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Facilitated transport of silver(I) cation across a bulk liquid membrane by two synthesized ligands, bis-β-enamino ester (BBEE) and bis(benzoic acid) trioxaheptane (BBAT), as carriers dissolved in dichloromethane has been investigated. BBEE was used as a specific ion carrier for the transport of silver(I) ion. The influence of experimental parameters affecting the transport efficiency of silver(I) ion have been studied. In the presence of thiosulfate as a suitable metal ion acceptor in the receiving phase and picrate ion as ion pairing agent in the source phase, the amount of silver(I) ion transported across the liquid membrane after 120 min was found to be 97%. Tolerance to the presence of different ions was investigated and it was found that silver(I) cation transport was not affected even in the presence of 10-fold concentration of these metal cations in solution. This system was applied for the recovery of silver(I) cation from silver plating and photographic waste solution.

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“…The carrier in the liquid membrane phase plays an important role in the liquid membrane process, which must (1) provide a very high extraction distribution coefficient from dilute solutions; (2) react reversibly with the metal ion so that it can be recovered by a stripping reaction; (3) have reasonably fast extraction and stripping kinetic; and (4) have very low solubility in the aqueous phase for economic and environmental reasons [13].…”

Section: Introductionmentioning

confidence: 99%

Kinetics study of selective removal of lead(II) in an aqueous solution containing lead(II), copper(II) and cadmium(II) across bulk liquid membrane

2012

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Emulsion Liquid Membranes for Wastewater Treatment: Equilibrium Models for Some Typical Metal-Extractant Systems

Cited by 67 publications

References 19 publications

Zinc and Copper Separation through an Emulsion Liquid Membrane Containing Di‐(2‐Ethylhexyl) Phosphoric Acid as a Carrier

Zinc and Copper Separation through an Emulsion Liquid Membrane Containing Di‐(2‐Ethylhexyl) Phosphoric Acid as a Carrier

Selective Transport of Silver(I) Cation Across a Bulk Liquid Membrane Containing Bis-β-enamino Ester as Ion Carrier

Kinetics study of selective removal of lead(II) in an aqueous solution containing lead(II), copper(II) and cadmium(II) across bulk liquid membrane

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