Process intensification in extraction by liquid emulsion membrane (LEM) process: A case study; enrichment of ruthenium from lean aqueous solution

Kankekar, Prasad S.; Wagh, Shrikant J.; Mahajani, Vijaykumar V.

doi:10.1016/j.cep.2010.02.005

Cited by 39 publications

(12 citation statements)

References 16 publications

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“…Therefore, an adequate contact time must be selected for better functioning of the process. It was reported that the optimum contact time on the rhutenium extraction was about 8 min [53]. Similar result was obtained by Bechiri et al [67] on the heteropolyanion complex extraction in aqueous solution.…”

Section: Effect Of Extraction Stirring Speed and Contact Timesupporting

confidence: 84%

“…Experiments by various researchers [24,32,53,61] indicated that the emulsion breakage increases with increase in contact time. This is due to the fact that a longer contact time generally results in higher water transport into the inner strip phase causing the membrane to swell and the emulsion may break eventually.…”

Section: Effect Of Extraction Stirring Speed and Contact Timementioning

confidence: 97%

“…Thus, the water transferred from the internal to external phases and the volume of emulsion phase decreased. On the other hand, Kankekar et al [53] reported that the use of concentrated H 2 SO 4 enhanced the water transportation thereby resulting in swelling. To solve the problem, the author used perchloric acid as a strippant at 2 M. The effect of internal phase type has also been investigated by Kumbasar [66].…”

Section: Effect Of Internal Phase and Diluentmentioning

confidence: 98%

“…Extractant acts as a 'shuttle' to carry the metal element through the liquid membrane [53]. However, its presence in membrane phase can decrease the emulsion stability.…”

Section: Effect Of Extractantmentioning

confidence: 99%

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Emulsion liquid membrane for heavy metal removal: An overview on emulsion stabilization and destabilization

Ahmad

Kusumastuti

Chan

et al. 2011

Chemical Engineering Journal

214

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Section: Effect Of Extraction Stirring Speed and Contact Timesupporting

confidence: 84%

Section: Effect Of Extraction Stirring Speed and Contact Timementioning

confidence: 97%

Section: Effect Of Internal Phase and Diluentmentioning

confidence: 98%

“…Extractant acts as a 'shuttle' to carry the metal element through the liquid membrane [53]. However, its presence in membrane phase can decrease the emulsion stability.…”

Section: Effect Of Extractantmentioning

confidence: 99%

See 2 more Smart Citations

Emulsion liquid membrane for heavy metal removal: An overview on emulsion stabilization and destabilization

Ahmad

Kusumastuti

Chan

et al. 2011

Chemical Engineering Journal

214

View full text Add to dashboard Cite

“…LEM application for recovery and enrichment of Nickel [6], Ruthenium [7], Rhodium [8] has been reported. There have been data on LIX 984N-C [9], LIX 54 [10], LIX 84 [11] for copper extraction by LEMs.…”

Section: Introductionmentioning

confidence: 99%

Extraction and Enrichment of Copper by Liquid Emulsion Membrane Using LIX 664N

Shah¹,

Tiwari²

2014

JEP

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Process intensification using liquid emulsion membranes (LEMs) for extraction of copper has been studied in this work. In LEM process the extraction and stripping processes are combined in one stage. The solubility of the solute or the chemical affinity between the solute and carrier reagent in the membrane results in the separation of the solute from the feed mixture. In this work the membrane phase comprised of LIX 664N as the extractant dissolved in kerosene and Span 80 as surfactant. The stripping phase was sulfuric acid with 180 g/l concentration and feed phase had copper concentration of 3.5 g/l. Effect of various process parameters such as batch contact time, speed of agitation, W:O ratio and treat ratio has been experimentally investigated to get better insight of the process. The maximum enrichment of copper in the internal phase obtained was 11.6 times with batch contact time of 10 minutes, agitation speed of 300 rpm and treat ratio of 6:1.

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Removal of High Concentrations of Arsenite from Aqueous Solutions by the Emulsion Liquid Membrane Technique

Ghasemi,

Abdi,

Nasiri

2024

ChemistrySelect

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As(III) is a dangerous species that contaminates groundwater resources and therefore water purification from this element is necessary. In this study, the removal of As(III) was investigated by the emulsion liquid membrane (ELM) technique due to the high toxicity levels of this species. The effect of various parameters such as hydrochloric acid and arsenic concentration in the feed solution, emulsion to feed ratio, surfactant concentration and type of carrier was evaluated on the arsenic separation efficiency. The results showed that the best type of carrier in terms of emulsion stability and separation efficiency of arsenic ions was di‐(2‐ethylhexyl) phosphoric acid (D2EHPA), and its optimal concentration was about 5 % (v/v). In addition, paraffin as the organic solvent performed better than the mixture of paraffin and kerosene in the separation of As(III) ions. The optimal conditions were obtained at 8 and 0.1 M HCl concentrations for the feed and the internal phases, respectively. Also, the emulsion to feed ratio of 1 : 4.5, the volume ratio of the internal phase to the membrane phase of 1 : 1 and the surfactant concentration of 5 % (v/v) led to achieving the maximum removal of arsenic ions. This work presents a broad perspective of removing As(III) ions from wastewater by carefully examining the parameters influencing the separation of this hazardous element through the ELM method.

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Process intensification in extraction by liquid emulsion membrane (LEM) process: A case study; enrichment of ruthenium from lean aqueous solution

Cited by 39 publications

References 16 publications

Emulsion liquid membrane for heavy metal removal: An overview on emulsion stabilization and destabilization

Emulsion liquid membrane for heavy metal removal: An overview on emulsion stabilization and destabilization

Extraction and Enrichment of Copper by Liquid Emulsion Membrane Using LIX 664N

Removal of High Concentrations of Arsenite from Aqueous Solutions by the Emulsion Liquid Membrane Technique

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