Liquid membrane multiple emulsion process of separation of copper(II) from waste waters

Chakravarti, A. N.; Chowdhury, Sukanya; Mukherjee, Devdeep

doi:10.1016/s0927-7757(99)00452-5

Cited by 48 publications

(27 citation statements)

References 22 publications

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“…[5,6] Emulsion liquid membranes (ELM) on the other hand exhibit greater potential, particularly in processing dilute feed streams for the separation and removal or recovery of metal ions. [7] ELMs proved to be an effective and inexpensive method in a variety of fields such as the recovery of various metal ions, [8 -14] removal of acetic acid, [15] removal of phenolic compounds and lactic acid [16,17] and recovery of pharmaceutical substances. [18] In this method, the diffusion of the metal ions is facilitated by the presence of an oil-soluble carrier.…”

Section: Introductionmentioning

confidence: 99%

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

Venkatesan

Begum

2008

Asia-Pacific J Chem Eng

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Copper and zinc were removed from dilute aqueous solutions together with recovery of copper from electroplating wastewater containing copper ions by emulsion liquid membrane (ELM) technique. The effects of surfactant concentration, carrier concentration, emulsification speed, emulsification time, internal phase stripping agent concentration, and aqueous-to-organic phase (A/O) volume ratio on the emulsion stability and breakup have been studied in detail and reported. A mixture of kerosene as diluent, span 80 as surfactant, di-(2-ethylhexyl) phosphate as carrier was used. An experimental study was performed to optimize the pH of the aqueous external phase based on distribution coefficient of solute between aqueous external phase and organic (membrane) phase. The batch extraction was carried out under various experimental conditions such as agitation time, agitation speed, membrane-to-external phase (M /E ) ratio, solute concentration in the feed phase and carrier concentration in membrane phase on the percentage recovery of zinc and copper ions in their respective feed streams and the operating parameters have been optimized for maximum recovery. It was found that 84% of copper and 86% of zinc were removed from aqueous solution with a concentration factor of 5. It was also found that ELM extraction of copper from wastewater was around 8-17% less than that of the synthetic solution. 

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Section: Introductionmentioning

confidence: 99%

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

Venkatesan

Begum

2008

Asia-Pacific J Chem Eng

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“…They found that with increasing quantities of liquid paraffin in the membrane phase, an emulsion hindered extraction of copper(II), this may be due to a gradual increase in the viscosity of both the membrane phase and the emulsion with increasing quantities of liquid paraffin [32]. In their experiment, 8.6 wt% of liquid paraffin in membrane phase made the emulsion stable [47]. Some studies have been done to compare the performance of diluent on the W/O emulsion stability.…”

Section: Effect Of Internal Phase and Diluentmentioning

confidence: 97%

“…The increase of surfactant concentration also leads to a higher emulsion viscosity. The condition increases the resistance at the interface and does not favor the extraction kinetics which is decreases the diffusion and mass transfer coefficient [26,[46][47][48]. The studies showed that the optimum surfactant concentration ranging from 2 to 5 wt%.…”

Section: Effect Of Surfactantmentioning

confidence: 99%

“…In order to increase the stability and ideal behaviour of the emulsion droplets, Chakravarti et al [32,47] used kerosene and different mixtures of liquid paraffin in kerosene. They found that with increasing quantities of liquid paraffin in the membrane phase, an emulsion hindered extraction of copper(II), this may be due to a gradual increase in the viscosity of both the membrane phase and the emulsion with increasing quantities of liquid paraffin [32].…”

Section: Effect Of Internal Phase and Diluentmentioning

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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“…A higher solvent loss during the process of extraction not only reduces the transport efficiency considerably but also leads to a higher number of stages for the separation of pure products [4,5]. Emulsion liquid membranes (ELM) on the other hand, exhibit greater potential, particularly in processing dilute feed streams for the separation and removal or recovery of metal ions [6]. ELM has proved to be an effective and inexpensive method in a variety of fields, such as the recovery of various metal ions [7][8][9][10][11], removal of acetic acid [12], removal of phenolic compounds and lactic acid [13,14], and recovery of pharmaceutical substances [15].…”

Section: Introductionmentioning

confidence: 99%

Emulsion Liquid Membrane Pertraction of Zinc and Copper: Analysis of Emulsion Formation using Computational Fluid Dynamics

et al. 2007

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This work reports on a study of batch extraction of metal ions (copper and zinc) from dilute aqueous solutions as well as recovery of copper from electroplating waste water by the emulsion liquid membrane (ELM) technique. Several experiments were conducted to assess the effect of membrane composition on metal recovery. The effect of surfactant concentration, carrier concentration, and emulsification time on the emulsion stability has been reported. The velocity profile and flow model of the two-phase mixing system during the preparation of the emulsion was generated using computational fluid dynamics (CFD). The batch extraction was carried out under various experimental conditions, such as agitation speed, M/E ratio, solute concentration in the feed phase, and carrier concentration in the membrane phase on the percentage recovery of zinc and copper ions in their respective feed streams. The operating parameters were optimized for maximum recovery. A comparison on the percentage recovery was made between synthetic solution and electroplating effluent containing copper ions.

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Liquid membrane multiple emulsion process of separation of copper(II) from waste waters

Cited by 48 publications

References 22 publications

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

Removal of copper and zinc from aqueous solutions and industrial effluents using emulsion liquid membrane technique

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

Emulsion Liquid Membrane Pertraction of Zinc and Copper: Analysis of Emulsion Formation using Computational Fluid Dynamics

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