Selective transport of Cadmium by PVC/Aliquat 336 polymer inclusion membranes (PIMs): the role of membrane composition and solution chemistry

Adelung, Sandra; Lohrengel, Burkhard; Nghiem, Long D.

doi:10.12989/mwt.2012.3.2.123

Cited by 20 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The successful separation of metal ions across the membrane is dependent on the chloride ions concentration in the source phase and chemical forms of metal ion in this solution. Adelung et al [ 36 ] and Upitis et al [ 20 ] also studied the separation of Cd(II) and Cu(II) from chloride solutions by transport across PIM with the quaternary ammonium salt—Aliquat 336. They reported that the formation of negatively charged metal chloride complex species was responsible for the extraction of the target metal to PIMs.…”

Section: Resultsmentioning

confidence: 99%

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

Pośpiech

2015

J Solution Chem

View full text Add to dashboard Cite

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) (SCd/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).

show abstract

Section: Resultsmentioning

confidence: 99%

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

Pośpiech

2015

J Solution Chem

View full text Add to dashboard Cite

show abstract

“…The transport of Cd(II) through PIMs in the studied chloride media using Aliquat 336 (

) can be described according to the following reaction [ 58 ]:

from which the driving force of transport is the gradient in chloride ions between the feed and stripping phases. The anion exchange mechanism then allows the migration of a negative charge complex of the metal ion from the feed to the stripping phase with the simultaneous migration of chloride anions in reverse direction, i.e., the feed phase is depleted from the metal while it is enriched in chloride ions.…”

Section: Resultsmentioning

confidence: 99%

“…The transport of Cd(II) through PIMs in the studied chloride media using Aliquat 336 (CH 3 (C 8 H 17 ) 3 N + Cl − ) can be described according to the following reaction [58]:…”

Section: Transport Mechanismsmentioning

confidence: 99%

On the Use of Polymer Inclusion Membranes for the Selective Separation of Pb(II), Cd(II), and Zn(II) from Seawater

Macías

Miguel

2023

Membranes

View full text Add to dashboard Cite

The synthesis and optimization of polymeric inclusion membranes (PIMs) for the transport of Cd(II) and Pb(II) and their separation from Zn(II) in aqueous saline media are presented. The effects of NaCl concentrations, pH, matrix nature, and metal ion concentrations in the feed phase are additionally analyzed. Experimental design strategies were used for the optimization of PIM composition and evaluating competitive transport. Synthetic seawater with 35% salinity, commercial seawater collected from the Gulf of California (Panakos®), and seawater collected from the beach of Tecolutla, Veracruz, Mexico, were employed. The results show an excellent separation behavior in a three-compartment setup using two different PIMs (Aliquat 336 and D2EHPA as carriers, respectively), with the feed phase placed in the central compartment and two different stripping phases placed on both sides: one solution with 0.1 mol/dm3 HCl + 0.1 mol/dm3 NaCl and the other with 0.1 mol/dm3 HNO3. The selective separation of Pb(II), Cd(II), and Zn(II) from seawater shows separation factors whose values depend on the composition of the seawater media (metal ion concentrations and matrix composition). The PIM system allows S(Cd) and S(Pb)~1000 and 10 < S(Zn) < 1000, depending on the nature of the sample. However, values as high as 10,000 were observed in some experiments, allowing an adequate separation of the metal ions. Analyses of the separation factors in the different compartments in terms of the pertraction mechanism of the metal ions, PIMs stabilities, and preconcentration characteristics of the system are performed as well. A satisfactory preconcentration of the metal ions was observed after each recycling cycle.

show abstract

“…It is a dynamic area in research as well as in large scale applications and therefore a great deal more work needs to be done in terms of generating experimental data for the purpose of developing high performance predictive and design models. Indeed, membranes have traditionally been employed in the area of separation technologies [7,8,9], but recently they were considered to have multiple functions by virtue of their potential in biological systems in particular when combined with other techniques like adsorption on natural products. One such natural product, namely fish scales, has been reported as promising but was not extensively tested [10,11].…”

Section: Introductionmentioning

confidence: 99%

A Novel Membrane Bioreactor System for Nitrification Inhibition by Cadmium

Chaalal¹,

Hank²,

Soliman³

et al. 2014

IJEMA

View full text Add to dashboard Cite

The inhibitory effect of heavy metals in nitrification has not been extensively investigated although it is expected that some form of inhibition would show up in the presence of these. Since Cadmium is a common heavy metal present in industrial effluents, its effect on nitrification has yet to be evaluated in qualitative and quantitative terms. In this investigation, a novel approach to studying heavy metal inhibition and mitigation in a full nitrification regime has been adopted. This approach consisted of employing a two-compartment membrane bioreactor and conducting a series of nitrification experiments in the absence and presence of a natural adsorbent placed in either compartment. The results obtained thus far clearly indicated an inhibitory effect when both heavy metal and biomass were placed in the same compartment. Diffusive transport across the membrane of produced nitrite and heavy metal showed different characteristics: whilst nitrite evolved to the other compartment according to the concentration driving force, the heavy metal concentration in either compartment change little.

show abstract

Selective transport of Cadmium by PVC/Aliquat 336 polymer inclusion membranes (PIMs): the role of membrane composition and solution chemistry

Cited by 20 publications

References 13 publications

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

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

On the Use of Polymer Inclusion Membranes for the Selective Separation of Pb(II), Cd(II), and Zn(II) from Seawater

A Novel Membrane Bioreactor System for Nitrification Inhibition by Cadmium

Contact Info

Product

Resources

About