Transport of silver metal ions through a liquid membrane gel using a solvating extractant (TOPO)

Taoualit, Nadjet; Hadj-Boussaad, D.E.

doi:10.1016/j.desal.2005.08.025

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…To determine the relative penetrations of extractant in polymer, one will determine the concentration of extractant in freezing according to time by using the balance of the masses [19]. The following curve was obtained; given the results, it appears that the diluent kerosene and solute DEHPA penetrate evenly throughout the gel.…”

Section: Penetration Of the Extractant In The Polymermentioning

confidence: 99%

Concentration of zinc ions in perchlorate medium by a menbrane-gel using an acid extractant (DEHPA)

Belhadji

Belkacemi

Hadj-Boussaad

2013

MATEC Web of Conferences

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Abstract. Recent decades, it is an awareness of the importance of ecological balance in the environment, balances threatened by industrial pollution. A new spirit presides we seek to minimize pollution of receiving waters. The present work is to study the liquid-gel-extraction of zinc ions in perchlorate medium by an acid extractant: the di (ethyl-2 hexyl) phosphorique acid, or DEHPA. Two types of polymers were used as supports of solvent extraction: a polybutadiene rubber cross-linked respectively with 0.1% dicumyl peroxide and 0.4% dicumyl peroxide, vulcanized at 160°C, one is most cross-linked than the other. The liquid-gel extraction is based on the principles of the liquid-liquid extraction.

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Section: Penetration Of the Extractant In The Polymermentioning

confidence: 99%

Concentration of zinc ions in perchlorate medium by a menbrane-gel using an acid extractant (DEHPA)

Belhadji

Belkacemi

Hadj-Boussaad

2013

MATEC Web of Conferences

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“…(1), where J is the flux of the transported HA, V R is the volume of receiving phase, ∆C is the variation of the concentration of the species diffused or complex in the receiving phase, corresponding to time interval ∆t [15,24,25].…”

Section: Experimental Device For Ha Transportmentioning

confidence: 99%

Extraction and Transport of Humic Acid using Supported Liquid-Membrane Containing Trioctyl Phosphine Oxide (TOPO) as the Carrier

et al. 2016

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Effluents or liquids of percolation from the discharges (leachates) are charged bacteriologically and especially chemically of mineral substances (mineral ions and heavy metals) and organic (volatile fatty acids, humic substances), which can contaminate soil, surface waters and ground waters. The humic substances, called also refractories, are not easily biodegradable and require concentrating them and/or adsorbing them by implementation of expensive processes. Scientists are looking for alternatives to eliminate or recover these substances. The present study investigates the elimination of humic acid from waste water using supported liquid membrane containing trioctyl phosphine oxide (TOPO) in toluene, as extractant. The supported liquid membrane is composed of a flat sheet of cross-linked polydimethylsiloxane (PDMS). In this study we have: (i) optimized the conditions for humic acid species transfer from feed aqueous phase to stripping phase across PDMS/TOPO/toluene supported liquid membrane; (ii) characterized the membrane by using FTIR technique and by determining the flux J, permeability P and diffusion coefficient of the complexed species D. Speciation of the humic acid species in the membrane organic carrier (extractant) phase has also been carried out using theoretically derived equations to elucidate the stoichiometry and mechanism of transport of humic acid across the PDMS/TOPO/toluene supported liquid membrane. Optimum conditions of transport for humic acid have been found to be: pH=3, [NaOH]=0.4 M, Eextraction = 94.67%, E diffusion = 32.5%, J = 1.34 × 10 −4 mg cm −2 s −1 , D = 1.16 × 10 −2 cm 2 s −1 and P = 2.64 cm s −1 . Kinetic parameters calculated from the experimental data have been determined. Thermodynamic functions of the several species transfer from the feed solution to the stripping one through the supported liquid membrane, such us enthalpy, entropy and Gibbs free energies, were determined. Positive values of ∆H and negative values of ∆G indicate respectively the endothermic and the spontaneous nature of the humic acid extraction in aqueous solution.

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Transport kinetics of chromium(VI) ions through a bulk liquid membrane containing p-tert-butyl calix[4]arene 3-morpholino propyl diamide derivative

Saf

Alpaydın

Sirit

2006

Journal of Membrane Science

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Transport of silver metal ions through a liquid membrane gel using a solvating extractant (TOPO)

Cited by 5 publications

References 4 publications

Concentration of zinc ions in perchlorate medium by a menbrane-gel using an acid extractant (DEHPA)

Concentration of zinc ions in perchlorate medium by a menbrane-gel using an acid extractant (DEHPA)

Extraction and Transport of Humic Acid using Supported Liquid-Membrane Containing Trioctyl Phosphine Oxide (TOPO) as the Carrier

Transport kinetics of chromium(VI) ions through a bulk liquid membrane containing p-tert-butyl calix[4]arene 3-morpholino propyl diamide derivative

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