Cd(II) and Pb(II) extraction and transport modeling in SLM and PIM systems using Kelex 100 as carrier

Aguilar, Julio César

doi:10.1016/s0376-7388(01)00433-1

Cited by 99 publications

(41 citation statements)

References 32 publications

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“…Facilitated transport of metal ions through PIM carrier [20,21]. Transport studies through cellulose triacetate membranes as polymeric matrix with showing high flux and good stability have been recently reported [22][23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Efficient Facilitated Transport of Lead and Cadmium Across a Plasticized Triacetate Membrane Mediated by D2EHPA and TOPO

Arous¹,

Saoud²,

Amara³

et al. 2011

MSA

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Cellulose triacetate membranes doped with organo-phosphoric carriers (2-ethylhexyl) phosphoric acid noted (D2EHPA) or trioctyl phosphine oxide noted (TOPO) as fixed carriers and 2-nitro phenyl octyl ether noted (NPOE) or tris ethylhexyl phosphate noted (TEHP) as a plasticizers have been prepared and applied for investigation to the facilitated transport of Pb(II) and Cd(II) ions from aqueous nitrate source phase. The membranes Polymer -Plasticizer -Carrier were characterised using chemical techniques as well as Fourier Transform Infra -Red (FTIR), X -ray Diffraction and Scanning electron microscopy (SEM).A study of the transport across a polymer inclusion membrane has shown that the lead or cadmium transport efficiency was increased using D2EHPA as carrier at pH 1-2.

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Section: Introductionmentioning

confidence: 99%

Efficient Facilitated Transport of Lead and Cadmium Across a Plasticized Triacetate Membrane Mediated by D2EHPA and TOPO

Arous¹,

Saoud²,

Amara³

et al. 2011

MSA

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“…12 In spite of the number of extracting reagents for Pb(II) and Cd(II) that can be employed in solvent extraction-related techniques, commerciallyavailable selective extractants may be preferred over specific-designed ones because of economic factors and their well-probed extraction behavior in largescale operations. Moreover, as has been recently reported, 13 membrane-based techniques may improve separations which are difficult to achieve by SX using commercial reagents, eg an increase in selectivity of Pb(II) over Cd(II) with respect to conventional SX using Kelex 100 was observed when the system was operated in flat membrane configuration due to differences in extraction reactions stoichiometries and diffusion of the species in the membrane phase. To explore the possibility of enhancing separations by interposing a membrane is, in this form, an interesting alternative over traditional SX techniques.…”

Section: Notationmentioning

confidence: 85%

Hollow‐fiber dispersion‐free extraction and stripping of Pb(II) in the presence of Cd(II) using D2EHPA under recirculating operation mode

Escobar

Schimmel

Gyves

et al. 2004

J of Chemical Tech & Biotech

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Lead(II) and cadmium(II) solvent extraction (SX) with D2EHPA dissolved in heptane and kerosene from aqueous chloride media was studied. Extraction reaction stoichiometries and extraction equilibrium constants were evaluated. Application of a dispersion-free membrane-based extraction and stripping technique with two hollow-fiber contactors under recirculating operation mode allowed a quantitative (>97%) removal of lead from the aqueous solution in the extraction module with a separation factor of 19 and a 62% recovery in the back-extraction module with a separation factor of 6.3 after 7 h under optimum conditions. Mass-transfer coefficients for the system were evaluated. Optimal conditions for transport and separation are reported and compared using SX and the membrane-based technique.

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“…The calculated value of 2 × 10 −9 m 2 s −1 was similar to the values observed for some SLM systems for Pb(II) and Cd(II) which use a commercial substituted 8-hydroxyquinoline as carrier (0.6 × 10 −9 to 1.8 × 10 −9 m 2 s −1 ). 39 …”

Section: Transport Mechanismmentioning

confidence: 99%

Mercury(II) removal using polymer inclusion membranes containing Cyanex 471X

Mercader-Trejo

Miguel

Gyves

2009

J of Chemical Tech & Biotech

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BACKGROUND: Regulatory controls to limit mercury emissions in waters have impacted on the development of membrane extraction-based methodologies for its separation. The specific advantages (effective carrier immobilization, easy preparation, versatility, and good mechanical properties) of polymer inclusion membranes (PIMs) make them suitable for this purpose. In this work a novel procedure using PIMs for mercury separation with a commercial available extractant (Cyanex 471X) is described and evaluated through the determination of the efficiency parameters (permeability, selectivity, stability) and membrane characterization.

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Cd(II) and Pb(II) extraction and transport modeling in SLM and PIM systems using Kelex 100 as carrier

Cited by 99 publications

References 32 publications

Efficient Facilitated Transport of Lead and Cadmium Across a Plasticized Triacetate Membrane Mediated by D2EHPA and TOPO

Efficient Facilitated Transport of Lead and Cadmium Across a Plasticized Triacetate Membrane Mediated by D2EHPA and TOPO

Hollow‐fiber dispersion‐free extraction and stripping of Pb(II) in the presence of Cd(II) using D2EHPA under recirculating operation mode

Mercury(II) removal using polymer inclusion membranes containing Cyanex 471X

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