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Application of Phosphonium Ionic Liquids as Ion Carriers in Polymer Inclusion Membranes (PIMs) for Separation of Cadmium(II) and Copper(II) from Aqueous Solutions.

Pospiech B - J Solution Chem (2015)

Bottom Line: It was found that the initial fluxes of Cd(II) and Cu(II) increase with increasing chloride ions concentration in the source phase.The selectivity coefficient for Cd(II) over Cu(II) decreases with increasing HCl concentration in the source phase.The results suggest that the separation system presented in this paper can be useful for the removal of Cd(II) from acidic chloride solutions in the presence of Cu(II).

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Czestochowa University of Technology, Armii Krajowej 19, 42-200 Czestochowa, Poland.

ABSTRACT

Facilitated transport through polymer inclusion membranes (PIMs) is a promising method for simultaneous separation and removal of valuable and toxic metal ions from aqueous solutions. Recently, ionic liquids (ILs) have been used as extracting agents for metal ions due to their unique physicochemical properties. This paper presents research on the facilitated transport of cadmium(II) and copper(II) ions from aqueous chloride solutions through PIMs with phosphonium ILs as new selective ion carriers. Cellulose triacetate membranes containing o-nitrophenyl octyl ether (ONPOE) as a plasticizer and Cyphos IL 101 [trihexyl(tetradecyl)phosphonium chloride] or Cyphos IL 104 [trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate] as the ion carriers have been prepared and applied for investigations. Cd(II) ions were transported preferably from hydrochloric acid solutions containing Cu(II) ions through the PIMs. Higher selectivity coefficient of Cd(II) over Cu(II) (S Cd/Cu) from 0.1 mol·dm(-3) hydrochloric acid was obtained for PIM with Cyphos IL 104 as the ion carrier. The influence of HCl and NaCl concentrations in the source phase on metal ion transport across PIM doped with Cyphos 104 was studied. It was found that the initial fluxes of Cd(II) and Cu(II) increase with increasing chloride ions concentration in the source phase. The selectivity coefficient for Cd(II) over Cu(II) decreases with increasing HCl concentration in the source phase. The results suggest that the separation system presented in this paper can be useful for the removal of Cd(II) from acidic chloride solutions in the presence of Cu(II).

No MeSH data available.


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The permeability coefficient (P) of Cd(II) and Cu(II) versus chloride concentration in the source phase from NaCl solutions. PIM: 1.5 mol·dm−3 Cyphos IL 104, 2.7 cm3 ONPOE/1 g CTA; the source phase: 0.01 mol·dm−3 Cd(II) and 0.01 mol·dm−3 Cu(II); the receiving phase: 1 mol·dm−3 H2SO4
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Fig6: The permeability coefficient (P) of Cd(II) and Cu(II) versus chloride concentration in the source phase from NaCl solutions. PIM: 1.5 mol·dm−3 Cyphos IL 104, 2.7 cm3 ONPOE/1 g CTA; the source phase: 0.01 mol·dm−3 Cd(II) and 0.01 mol·dm−3 Cu(II); the receiving phase: 1 mol·dm−3 H2SO4

Mentions: The influence of chloride ion concentration on the initial flux (Ji) of Cd(II) and Cu(II) was investigated. The experiments were carried out at various chloride concentrations provided by sodium chloride. The concentration of chloride ions [Cl−] was varied between 0.1 and 2 mol·dm−3. The results are presented in Fig. 6. This figure shows changes of the permeability coefficients of metal ions with chloride concentration in the source phase. As can be observed from this figure, when the chloride ions concentration increases, the values of the permeability coefficients also increase for both metal ions. The permeability coefficients of Cd(II) and Cu(II) reached the highest values of 2.75 and 1.52 μm·s−1, respectively, at 2 mol·dm−3 chloride in the source solution. It can be observed that the transport of Cd(II) was very effective from highly saline media. Similar dependences in the transport of Cd(II) and Cu(II) through the PIM with Cyphos IL 104 were obtained from hydrochloric acid solutions but the obtained values of permeability coefficients are higher in the case of transport of metal ions from sodium chloride solutions. We can see that permeation was more effective for the transport of Cd(II) than Cu(II) from sodium chloride solutions as well as from hydrochloric acid solutions.Fig. 6


Application of Phosphonium Ionic Liquids as Ion Carriers in Polymer Inclusion Membranes (PIMs) for Separation of Cadmium(II) and Copper(II) from Aqueous Solutions.

Pospiech B - J Solution Chem (2015)

The permeability coefficient (P) of Cd(II) and Cu(II) versus chloride concentration in the source phase from NaCl solutions. PIM: 1.5 mol·dm−3 Cyphos IL 104, 2.7 cm3 ONPOE/1 g CTA; the source phase: 0.01 mol·dm−3 Cd(II) and 0.01 mol·dm−3 Cu(II); the receiving phase: 1 mol·dm−3 H2SO4
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4666278&req=5

Fig6: The permeability coefficient (P) of Cd(II) and Cu(II) versus chloride concentration in the source phase from NaCl solutions. PIM: 1.5 mol·dm−3 Cyphos IL 104, 2.7 cm3 ONPOE/1 g CTA; the source phase: 0.01 mol·dm−3 Cd(II) and 0.01 mol·dm−3 Cu(II); the receiving phase: 1 mol·dm−3 H2SO4
Mentions: The influence of chloride ion concentration on the initial flux (Ji) of Cd(II) and Cu(II) was investigated. The experiments were carried out at various chloride concentrations provided by sodium chloride. The concentration of chloride ions [Cl−] was varied between 0.1 and 2 mol·dm−3. The results are presented in Fig. 6. This figure shows changes of the permeability coefficients of metal ions with chloride concentration in the source phase. As can be observed from this figure, when the chloride ions concentration increases, the values of the permeability coefficients also increase for both metal ions. The permeability coefficients of Cd(II) and Cu(II) reached the highest values of 2.75 and 1.52 μm·s−1, respectively, at 2 mol·dm−3 chloride in the source solution. It can be observed that the transport of Cd(II) was very effective from highly saline media. Similar dependences in the transport of Cd(II) and Cu(II) through the PIM with Cyphos IL 104 were obtained from hydrochloric acid solutions but the obtained values of permeability coefficients are higher in the case of transport of metal ions from sodium chloride solutions. We can see that permeation was more effective for the transport of Cd(II) than Cu(II) from sodium chloride solutions as well as from hydrochloric acid solutions.Fig. 6

Bottom Line: It was found that the initial fluxes of Cd(II) and Cu(II) increase with increasing chloride ions concentration in the source phase.The selectivity coefficient for Cd(II) over Cu(II) decreases with increasing HCl concentration in the source phase.The results suggest that the separation system presented in this paper can be useful for the removal of Cd(II) from acidic chloride solutions in the presence of Cu(II).

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Czestochowa University of Technology, Armii Krajowej 19, 42-200 Czestochowa, Poland.

ABSTRACT

Facilitated transport through polymer inclusion membranes (PIMs) is a promising method for simultaneous separation and removal of valuable and toxic metal ions from aqueous solutions. Recently, ionic liquids (ILs) have been used as extracting agents for metal ions due to their unique physicochemical properties. This paper presents research on the facilitated transport of cadmium(II) and copper(II) ions from aqueous chloride solutions through PIMs with phosphonium ILs as new selective ion carriers. Cellulose triacetate membranes containing o-nitrophenyl octyl ether (ONPOE) as a plasticizer and Cyphos IL 101 [trihexyl(tetradecyl)phosphonium chloride] or Cyphos IL 104 [trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate] as the ion carriers have been prepared and applied for investigations. Cd(II) ions were transported preferably from hydrochloric acid solutions containing Cu(II) ions through the PIMs. Higher selectivity coefficient of Cd(II) over Cu(II) (S Cd/Cu) from 0.1 mol·dm(-3) hydrochloric acid was obtained for PIM with Cyphos IL 104 as the ion carrier. The influence of HCl and NaCl concentrations in the source phase on metal ion transport across PIM doped with Cyphos 104 was studied. It was found that the initial fluxes of Cd(II) and Cu(II) increase with increasing chloride ions concentration in the source phase. The selectivity coefficient for Cd(II) over Cu(II) decreases with increasing HCl concentration in the source phase. The results suggest that the separation system presented in this paper can be useful for the removal of Cd(II) from acidic chloride solutions in the presence of Cu(II).

No MeSH data available.


Related in: MedlinePlus