Fixed sites plasticized cellulose triacetate membranes containing crown ethers for silver(I), copper(II) and gold(III) ions transport

Gherrou, Abdelaziz; Kerdjoudj, Halima; Molinari, Raffaele; Seta, P.; Drioli, Enrico

doi:10.1016/j.memsci.2003.10.003

Cited by 87 publications

(48 citation statements)

References 17 publications

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“…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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“…2c) the vibration band appearing at 1473 cm -1 corresponds to bending vibrations of the CH 2 group (d CH2 ). The notable intensity band at 1108 cm -1 is attributed to stretching asymmetric vibrations of -CH 2 -O-CH 2 -groups of 18C6 crown-ether [36]. In the range between 1200 and 900 cm -1 the bands attributed to stretching vibrations of Si-O bonds belonging to the organopolysiloxane matrix are observed.…”

Section: Resultsmentioning

confidence: 89%

Silacrown modified xerogels as functional hybrid materials for carbon composite electrodes

Colilla

Darder

Ruiz-Hitzky

2009

Comptes Rendus. Chimie

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“…This can be explained because under acidic conditions CTA is prone to hydrolysis due to the presence of esters in its chemical structure (Figure 11b). Hydrophobic non-polar carriers (i.e., DCH18C6) become incompatible in such environment [39,40] because the loss of the methyl groups by hydrolysis leads to a less hydrophobic membrane interface. Therefore, DCH18C6 is not soluble anymore and it releases from the membrane matrix.…”

Section: Effect Of the Receiving Phase On Membrane Stabilitymentioning

confidence: 99%

Polymer Inclusion Membranes (PIM) for the Recovery of Potassium in the Presence of Competitive Cations

Casadellà

Schaetzle²,

Nijmeijer

et al. 2016

Polymers

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Abstract:Potassium is an important nutrient used in fertilizers but is not always naturally available We investigated the properties of polymer inclusion membranes (PIM) regarding their selective recovery of K + over competitive ions typically present in urine (Na + and NH 4 + ). The greatest flux was observed when the ratio of mass 2-nitrophenyl octyl ether (2-NPOE) used as plasticizer to cellulose triacetate (CTA) used as polymer was 0.25. The highest flux was achieved with a content of 24.8 wt % of dicyclohexan-18-crown-6 (DCH18C6) used as carrier, although the highest selectivity was observed with a content of 14.0 wt % of DCH18C6. We also studied whether the transport mechanism occurring in our system was based on co-transport of a counter-ion or ion exchange. Two different receiving phases (ultrapure water and 100 mM HCl) were tested. Results on transport mechanisms suggest that co-transport of cations and anions is taking place across our PIMs. The membrane deteriorated and lost its properties when the receiving phase was acidic; we suggested that this was due to hydrolysis of CTA. The greatest flux and selectivity were observed in ultrapure water as receiving phase.

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Fixed sites plasticized cellulose triacetate membranes containing crown ethers for silver(I), copper(II) and gold(III) ions transport

Cited by 87 publications

References 17 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

Silacrown modified xerogels as functional hybrid materials for carbon composite electrodes

Polymer Inclusion Membranes (PIM) for the Recovery of Potassium in the Presence of Competitive Cations

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