Pseudo-Emulsion Based Hollow Fiber Strip Dispersion Technique (PEHFSD): Optimization, Modelling and Application of PEHFSD for Recovery of U(VI) from Process Effluent

Roy, Shobhan; Sonawane, J. V.; Rathore, N.S.; Pabby, Anil Kumar; Janardan, P.; Changrani, R.D.; Dey, P. K.; Bharadwaj, S.R.

doi:10.1080/01496390802064141

Cited by 32 publications

(5 citation statements)

References 14 publications

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“…Previous literature on SLM with strip dispersion has focused on the removal and recovery of heavy metals such as chromium [13], copper [14], zinc [14], cobalt [14], strontium [15], uranium [16], gold [17], and cadmium [18]. Studies have ranged from lab to pilot plant scales and have demonstrated that SLM with strip dispersion can efficiently remove metals from aqueous solutions, while also recovering them in high concentrations in the aqueous strip solution.…”

Section: Introductionmentioning

confidence: 99%

Supported liquid membranes with strip dispersion for the recovery of Cephalexin

Vilt

2009

Journal of Membrane Science

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a b s t r a c tThe removal and recovery of Cephalexin from aqueous solutions by supported liquid membranes (SLMs) with strip dispersion has been studied. Experiments used a Liqui-Cel ® hollow-fiber module as a mircoporous support and an organic membrane solution consisting of Aliquat 336, Isopar L (isoparaffinic hydrocarbon solvent), and 1-decanol. The aqueous strip solution was composed of potassium chloride and citrate buffer. The presence of the strip dispersion, formed by dispersing the aqueous strip solution in the organic membrane solution with a mixer, on the shell-side of the hollow-fiber module ensures SLM stability. Various experimental parameters such as strip dispersion mixing rate, Aliquat 336 concentration in the organic membrane phase, KCl and citrate buffer concentrations in the aqueous strip solution, volume of aqueous strip solution, and feed and strip dispersion flow rates were investigated. High extraction and recovery rates were achieved when maintaining a proper pH in the aqueous strip solution combined with an excess of KCl. Typical results using an Aliquat 336 concentration of 2.5 wt% (48 mM) have shown >99% extraction, recovery rates of 96-98%, and enrichment ratios of 1.6-3.3 from a feed solution containing 15 mM of Cephalexin. Mass transfer resistances were analyzed, showing the resistance from the extraction reaction to be dominant.

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Section: Introductionmentioning

confidence: 99%

Supported liquid membranes with strip dispersion for the recovery of Cephalexin

Vilt

2009

Journal of Membrane Science

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“…Among these technologies, liquid membranes (LMs) have shown certain potential, and several configurations of LMs are currently being investigated for various applications. Various supported liquid membrane (SLM) techniques in flat‐sheet (FSSLM), hollow fiber (HFSLM), and spiral‐wound configurations are also under consideration 3–10. Hollow fiber and spiral‐wound modules are best suited to providing high surface‐area‐to‐volume ratios.…”

Section: Introductionmentioning

confidence: 99%

Pseudo‐emulsion based hollow fiber strip dispersion: A novel methodology for gold recovery

Sonawane¹,

Pabby²,

Sastre³

2007

AIChE Journal

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This article presents the study of Au(I) extraction from synthetic cyanide media through pseudo‐emulsion based hollow fiber strip dispersion (PEHFSD) containing LIX‐79/n‐heptane as extractant in the form of a pseudo‐emulsion with NaOH. The permeation of Au(I) is investigated as a function of various experimental variables: hydrodynamic conditions, feed pH, LIX‐79 concentration in pseudo‐emulsion, cyanide concentration in feed phase, NaOH concentration in pseudo‐emulsion as a strippant, and initial Au(I) concentration in feed phase. In PEHFSD, pseudo‐emulsion is an emulsion that is formed temporarily between organic and stripping solutions. The organic and aqueous solutions are separated when the stirring device is stopped. In this study, feed was circulated through the tube side in counter current mode. The linear flow velocity of the feed was varied between 0.74 and 2.58 cm/s and the linear flow velocity of the pseudo‐emulsion was maintained at 0.28 cm/s. The value of the permeation coefficient obtained under standard experimental conditions was 8.19 × 10−5 cm/s. The selectivity of LIX‐79/n‐heptane based PEHFSD toward different metal cyanide salts such as Fe(II), Cu(I), Ni(II), Zn(II), and Ag(I) was also examined. © 2007 American Institute of Chemical Engineers AIChE J, 2008

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“…Plutonium reconversion in reprocessing plants generated oxalate supernatant during plutonium precipitation by oxalic acid as plutonium oxalate. Recently, it was investigated the transport of U(VI) using PEHFSD technique [50]. The pseudo-emulsion phase consist in a continuous phase of TBP dissolved in n-paraffi n hydrocarbon and a dispersed solution of 0.01 M nitric acid, whereas the feed solution containing uranium at various nitric acid concentrations.…”

Section: Applications Of Strip/organic Dispersion Methodologiesmentioning

confidence: 99%