Membrane processes for the efficient recovery of anionic pollutants

Ortiz, Inmaculada; Bringas, Eugenio; Samaniego, Henar; Román, M. Fresnedo San; Urtiaga, Ane

doi:10.1016/j.desal.2005.05.034

Cited by 25 publications

(22 citation statements)

References 12 publications

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“…The membrane based extraction can be realized in the system of two modules with the organic phase circulating in the shell side of the modules [64,[67][68][69][74][75][76][77][78] or in one module in which polymeric support is impregnated with the organic phase -SLM [79]. Zn(II) transport through supported liquid membrane (SLM) impregnated with 30% Cyanex 923 in Solvesso 100 is controlled by diffusion in the aqueous solution, and needs a long time.…”

Section: Classical and Membrane Based Solvent Extractionmentioning

confidence: 99%

A review on methods of regeneration of spent pickling solutions from steel processing

Regel‐Rosocka

2010

Journal of Hazardous Materials

244

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Section: Classical and Membrane Based Solvent Extractionmentioning

confidence: 99%

A review on methods of regeneration of spent pickling solutions from steel processing

Regel‐Rosocka

2010

Journal of Hazardous Materials

244

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“…Recent references about the use of these technologies can be found elsewhere [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Cobalt(II) membrane-extraction by DP-8R/Exxsol D100 using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing

Alguacil¹,

García‐Díaz²,

López³

et al. 2011

Separation and Purification Technology

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The transport of cobalt(II) from acidic sulphate solutions through PEHFSD was investigated using the extractant DP-8R in Exxsol D100. The acidic feed solution containing Co(II) was passed through the tube side, and pseudo-emulsions of DP-8R/Exxsol D100 and sulphuric acid was passed through the shell side in counter-current mode, using a single microporous hydrophobic polypropylene hollow fiber contactor for extraction and stripping. In PEHFSD the aqueous strip (sulphuric acid) solution was dispersed in the organic membrane solution in a reservoir tank with an impeller stirrer to form a strip dispersion. This pseudo-emulsion phase is circulated from the tank to the membrane module to provide a constant supply of the carrier solution to the membrane micropores. Several hydrodynamic and chemical parameters, such as variation in feed pH (3-7), cobalt concentration in feed (0.17-1.7x10 -3 M), carrier concentration (0.16-1.28 M), etc., were investigated. Mass transfer modelling was performed and the validity of the model was evaluated with experimental data. Moreover, the system was 2 applied in the cobalt purification of synthetic lithium solutions derived from the processing of rechargeable batteries, with cobalt/lithium separation factor values around 25.

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“…In a membrane dialysis system, the feed solution (defined as the retentate phase) and the receiving solution (defined as the dialysate phase) are usually composed of the same solvent and consequently, it is impossible to avoid the transport of the solvent across the membrane because of the pressure gradient in the two phases. This mechanism of operation is different from other methods involving membrane contactors, e.g., solvent extraction [2][3][4], gas absorption [5][6][7], ion exchange [8,9] and membrane distillation [10,11]. The early applications of membrane dialysis include Donnan dialysis [12] and alcohol reduction of beverages [13].…”

Section: Introductionmentioning

confidence: 99%

Two‐Dimensional Mass‐Transfer Model of a Flat‐Plate Dialyzer with Ultrafiltration Operation

2010

Chem Eng & Technol

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A two-dimensional theoretical model of a flat-plate dialyzer with ultrafiltration operation was developed in this study. The two-dimensional velocity profile of the fluid and the concentration distribution in the membrane of the dialysis system with ultrafiltration operation were also derived. The Crank-Nicolson method was used to numerically solve the two-dimensional theoretical model. The influences of the retentate phase flow rate, dialysate phase flow rate, ultrafiltration flow rate and channel thickness ratio on the concentration distribution and the mass transfer rate were illustrated. A considerable mass-transfer efficiency improvement was obtained by employing the flat-plate dialyzer with ultrafiltration operation in comparison to the pure dialysis system without ultrafiltration operation. An experiment involving urea separation by the flat-plate dialyzer with ultrafiltration operation was also performed to confirm the accuracy of the proposed mathematical model.

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Membrane processes for the efficient recovery of anionic pollutants

Cited by 25 publications

References 12 publications

A review on methods of regeneration of spent pickling solutions from steel processing

A review on methods of regeneration of spent pickling solutions from steel processing

Cobalt(II) membrane-extraction by DP-8R/Exxsol D100 using pseudo-emulsion based hollow fiber strip dispersion (PEHFSD) processing

Two‐Dimensional Mass‐Transfer Model of a Flat‐Plate Dialyzer with Ultrafiltration Operation

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