Water-In-oil Emulsion Liquid Membrane Transport of L-Cysteine

Fathi, S.A.M.; Yaftian, Mohammad Reza; Kargari, Ali

doi:10.1080/01496395.2012.675001

Cited by 14 publications

(5 citation statements)

References 35 publications

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“…When the concentration of Span 80 was more than 5 wt%, the large amount of Span 80 in the system tended to increase the viscosity and thickness of the emulsion liquid membrane enhancing diffusion resistance and lowering the extraction efficiency. These study results are in agreement with others in the literature . For a balance between the stability of W/O emulsion and extraction efficiency, 5 wt% of Span 80 was selected as the optimal surfactant concentration.…”

Section: Resultssupporting

confidence: 91%

“…Fluorine transfer from the external phase through the organic membrane phase to the internal phase was a complex mass‐transfer process affected by many factors. Many equilibrium correlations have been established for describing the fluorine concentration in different phases . However, these equilibrium correlations were all different because of the various parameters involved and the different modes of occurrence of fluorine .…”

Section: Resultsmentioning

confidence: 99%

“…Many chemical techniques have been investigated for purifying FCG, such as precipitation, ion exchange, adsorption and membrane separation . Experimental and technical results show that defluorination by emulsion liquid membrane is a practical and promising method for purification of FCG due to its high interfacial surface area for mass transfer, simultaneous extraction and stripping operations in one stage, high solute transfer flux and recyclability of raw materials.…”

Section: Introductionmentioning

confidence: 99%

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Mass transfer and equilibrium characteristics of defluorination from groundwater by emulsion liquid membrane

Sun

Pei

et al. 2016

J of Chemical Tech & Biotech

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BACKGROUND: The defluorination of fluoride contaminated groundwater by emulsion liquid membrane using primary amine LK-N21 as fluoride carrier and Span 80 as surfactant has been investigated. RESULTS: The purification process comprised preparation of W/O emulsion, extraction and demulsification operations. The transport mechanism of fluoride by emulsion liquid membrane using primary amine LK-N21 as fluoride carrier was determined. The extraction conditions, i.e. surfactant and carrier concentration, type and concentration of precipitant, emulsification time and speed, volume ratio of internal phase to organic membrane phase, external phase pH and volume ratio of external phase to W/O emulsion for purification of the fluoride contaminated groundwater were studied. CONCLUSIONS: The treated natural groundwater samples finally were found to have been treated with high extraction efficiency, thus meeting the limiting values of the quality standard of class II for groundwater in China. Equilibrium extraction correlation was found to represent well the fluorine equilibrium relation in the emulsion membrane extraction system from the experimental data. Optimization of the purification conditions and system enabled realization of the practical defluorination needs for fluoride contaminated groundwater. DemulsificationThe mixtures (W/O/W) were completely separated into two liquid phases by gravity and the purified aqueous phase was taken wileyonlinelibrary.com/jctb

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mass transfer and equilibrium characteristics of defluorination from groundwater by emulsion liquid membrane

Sun

Pei

et al. 2016

J of Chemical Tech & Biotech

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“…Compared with other liquid membranes, the emulsion liquid membrane has some attractive features such as very high inter-facial area for mass transfer, capability of applying carrier-mediated transport, great potential for treating various compounds in a short time, and low energy consumption [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Response Surface Optimization of Dysprosium Extraction Using an Emulsion Liquid Membrane Integrated with Multi‐Walled Carbon Nanotubes

et al. 2018

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A new emulsion liquid membrane was prepared for dysprosium (Dy) extraction from aqueous solution using multi-walled carbon nanotubes (MWCNTs). The influence of MWCNT concentration, carrier and surfactant concentration, stirring speed, feed-phase pH, and internal phase concentration and their interactive effects were studied. A regression model for Dy extraction was developed and the parameters were optimized by response surface methodology. The extent of extraction increases with higher MWCNT concentration up to a certain level. The Dy extraction through the liquid membrane containing MWCNT improves with time. Moreover, the overall mass transfer coefficient was enhanced in the presence of MWCNT due to the formation of a more stable emulsion and liquid membrane.

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“…Pertraction of heavy metals such as Cd [31,32], Pb [25,33], Zn [34,35], Cu [36,37], and Cr [38], and precious metals such as Ag [39,40], Au [41][42][43][44][45], and Pt [46] has been studied in recent years. ELM may be able to recover both inorganic and organic molecules from ion metal species and perhaps even recover biomolecules [47][48][49]. It has been reported that at least three industrial wastewater treatment plants have used ELM technology to recover zinc ions with a capacity of 75-200 m 3 h -1 since 1986.…”

Section: Introductionmentioning

confidence: 99%

Pertraction of Vanadium(V) from Dilute Acidic Media by an Emulsion Liquid Membrane Containing a Commercial Extractant

2022

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Emulsion liquid membrane (ELM) pertraction of VV ions from dilute acidic solution by using a mixture of di(2‐ethylhexyl)phosphoric acid (D2EHPA) and mono(2‐ethylhexyl)phosphoric acid (M2EHPA) was studied. First, solvent extraction of VV from an aqueous medium was performed, and the optimum feed pH and extractant concentration were obtained. Tributyl phosphate was used as modifier to increase membrane stability and decrease membrane swelling. The effects of diluent type, extractant concentration of the emulsifier concentration, stripping reagent concentration (sulfuric acid), organic phase/stripping phase volume ratio, emulsification time and speed, feed initial pH, agitation speed, temperature, and contact time on VV extraction efficiency and ELM stability were considered.

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Water-In-oil Emulsion Liquid Membrane Transport of L-Cysteine

Cited by 14 publications

References 35 publications

Mass transfer and equilibrium characteristics of defluorination from groundwater by emulsion liquid membrane

Mass transfer and equilibrium characteristics of defluorination from groundwater by emulsion liquid membrane

Response Surface Optimization of Dysprosium Extraction Using an Emulsion Liquid Membrane Integrated with Multi‐Walled Carbon Nanotubes

Pertraction of Vanadium(V) from Dilute Acidic Media by an Emulsion Liquid Membrane Containing a Commercial Extractant

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