Application of a polymer inclusion membrane made of cellulose triacetate base polymer and trioctylamine for the selective extraction of bismuth( III ) from chloride solutions

Abstract In this work the selective transport of cobalt(II) and lithium(I) ions from aqueous chloride solutions through polymer inclusion membranes (PIMs) is presented. Triisooctylamine (TIOA) has been applied as the ion carrier in membrane. The effects of various parameters on the transport of Co(II) and Li(I) were studied. The obtained results show that Co(II) ions were effectively removed from source phase through PIM containing 32 wt.% TIOA, 22 wt.% CTA (cellulose triacetate) and 46 wt.% ONPOE (o-nitrophenyl octyl ether) or ONPPE (o-nitrophenyl pentyl ether) into deionized water as the receiving phase. The results indicate that there is a possibility of polymer inclusion membranes application to recover Co(II) and Li(I) from aqueous chloride solutions

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On the Potential of a Poly(vinylidenefluoride-co-hexafluoropropylene) Polymer Inclusion Membrane Containing Aliquat® 336 and Dibutyl Phthalate for V(V) Extraction from Sulfate Solutions

Membranes ◽

10.3390/membranes12010090 ◽

2022 ◽

Vol 12 (1) ◽

pp. 90

Author(s):

Salar Bahrami ◽

Leila Dolatyari ◽

Hassan Shayani-Jam ◽

Mohammad Reza Yaftian ◽

Spas D. Kolev

Keyword(s):

Thermogravimetric Analysis ◽

Dibutyl Phthalate ◽

Selective Extraction ◽

Extraction Process ◽

Back Extraction ◽

Inclusion Membrane ◽

Polymer Inclusion Membrane ◽

Average Mass ◽

Sulfate Solutions ◽

Base Polymer

A polymer inclusion membrane (PIM) composed of 50 wt% base polymer poly(vinylidenefluoride-co-hexafluoropropylene), 40 wt% extractant Aliquat® 336, and 10 wt% dibutyl phthalate as plasticizer/modifier provided the efficient extraction of vanadium(V) (initial concentration 50 mg L−1) from 0.1 M sulfate solutions (pH 2.5). The average mass and thickness of the PIMs (diameter 3.5 cm) were 0.057 g and 46 μm, respectively. It was suggested that V(V) was extracted as VO2SO4− via an anion exchange mechanism. The maximum PIM capacity was estimated to be ~56 mg of V(V)/g for the PIM. Quantitative back-extraction was achieved with a 50 mL solution of 6 M H2SO4/1 v/v% of H2O2. It was assumed that the back-extraction process involved the oxidation of VO2+ to VO(O2)+ by H2O2. The newly developed PIM, with the optimized composition mentioned above, exhibited an excellent selectivity for V(V) in the presence of metallic species present in digests of spent alumina hydrodesulfurization catalysts. Co-extraction of Mo(VI) with V(V) was eliminated by its selective extraction at pH 1.1. Characterization of the optimized PIM was performed by contact angle measurements, atomic-force microscopy, energy dispersive X-ray spectroscopy, thermogravimetric analysis/derivatives thermogravimetric analysis and stress–strain measurements. Replacement of dibutyl phthalate with 2-nitrophenyloctyl ether improved the stability of the studied PIMs.

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On the Potential of a Poly(Vinylidenefluoride-Co-hexafluoropropylene) Polymer Inclusion Membrane Containing Aliquat® 336 and Dibutyl Phthalate for V(V) Extraction from Sulfate Solutions

10.20944/preprints202111.0494.v1 ◽

2021 ◽

Author(s):

Salar Bahrami ◽

Leila Dolatyari ◽

Hassan Shayani-Jam ◽

Mohammad Reza Yaftian ◽

Spas D. Kolev

Keyword(s):

Hydrogen Peroxide ◽

Thermogravimetric Analysis ◽

Dibutyl Phthalate ◽

Selective Extraction ◽

Extraction Process ◽

Back Extraction ◽

Inclusion Membrane ◽

Polymer Inclusion Membrane ◽

Sulfate Solutions ◽

Base Polymer

A polymer inclusion membrane (PIM) composed of 50 wt% poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) as its base polymer, 40 wt% Aliquat® 336 as its extractant and 10 wt% dibutyl phthalate (DBP) as plasticizer provided efficient extraction of vanadium(V) from its sulfate solutions adjusted to pH 2.5. It was suggested that V(V) was extracted as VO2SO4− via an anion exchange mechanism. Quantitative back-extraction was achieved in a sulfuric acid solution (6 mol L-1) containing 1 v/v% of hydrogen peroxide. It was assumed that the back-extraction process involved the oxidation of VO2+ to VO(O2)+ by hydrogen peroxide. The newly developed PIM with the optimized composition mentioned above exhibited excellent selectivity for V(V) in the presence of metallic species present in digests of spent alumina hydrodesulfurization catalysts (i.e., Al(III), Co(II), Cu(II), Fe(III), Mn(II), and Ni(II)). The co-extraction of Mo(VI) with V(V) was eliminated by its selective extraction at pH 1.1. The optimized PIM was characterized by contact angle measurements, atomic-force microscopy (AFM), energy dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA)/derivatives thermogravimetric analysis (DTGA), and the stress-strain measurements.

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Facilitated Transport of Copper(II) across Polymer Inclusion Membrane with Triazole Derivatives as Carrier

Membranes ◽

10.3390/membranes10090201 ◽

2020 ◽

Vol 10 (9) ◽

pp. 201

Author(s):

Bernadeta Gajda ◽

Radosław Plackowski ◽

Andrzej Skrzypczak ◽

Mariusz B. Bogacki

Keyword(s):

Ion Transport ◽

Flow Rate ◽

Alkyl Substituent ◽

Cellulose Triacetate ◽

Carbon Chain ◽

Inclusion Membrane ◽

Polymer Inclusion Membrane ◽

Demineralized Water ◽

Nitrophenyl Octyl Ether ◽

Membrane Changes

This study investigates copper(II) ion transport through a polymer inclusion membrane (PIM) containing 1-alkyl-1,2,4-triazole (n = 8, 9, 10, 11, 12, 14), o-nitrophenyl octyl ether as the plasticizer and cellulose triacetate as the polymer matrix. The feeding phase was a solution of 0.1 mol/dm3CuCl2 and an equimolar (0.1 mol/dm3) mixture of copper, nickel, and cobalt chlorides with varying concentrations of chloride anions (from 0.5 to 5.0 mol/dm3) established with NaCl. The receiving phase was demineralized water. The flow rate of the source and receiving phases through the membrane module was within the range from 0.5 cm3/min to 4.5 cm3/min. The tests were carried out at temperatures of 20, 30, 40 and 50 °C. Transport of NaCl through the membrane was excluded for the duration of the test. It was noted that the flow rate through the membrane changes depending on the length of the carbon chain in the alkyl substituent from 16.1 μmol/(m2s) to 1.59 μmol/(m2s) in the following order: C8> C9> C10> C11> C12> C14. The activation energy was 71.3 ± 3.0 kJ/mol, indicating ion transport through the PIM controlled with a chemical reaction. Results for transport in case of the concurrent separation of copper(II), nickel(II), and cobalt(II) indicate a possibility to separate them in a selective manner.

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Application of Plasticized Cellulose Triacetate Membranes for Recovery and Separation of Cerium(III) and Lanthanum(III)

Autex Research Journal ◽

10.2478/aut-2021-0019 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Beata Pospiech ◽

Adam Makowka

Keyword(s):

Metal Ions ◽

Phosphinic Acid ◽

Cellulose Triacetate ◽

Inclusion Membrane ◽

Polymer Inclusion Membrane ◽

Cyanex 272 ◽

Dithiophosphinic Acid ◽

Cyanex 301 ◽

Source Phase

Abstract This work explains the application of plasticized cellulose triacetate (CTA) membranes with Cyanex 272 di(2,4,4-(trimethylpentyl)phosphinic acid) and Cyanex 301 (di(2,4,4-trimethylpentyl)dithiophosphinic acid) as the ion carriers of lanthanum(III) and cerium(III). CTA is used as a support for the preparation of polymer inclusion membrane (PIM). This membrane separates the aqueous source phase containing metal ions and the receiving phase. 1M H2SO4 is applied as the receiving phase in this process. The separation properties of the plasticized membranes with Cyanex 272 and Cyanex 301 are compared. The results show that the transport of cerium(III) through PIM with Cyanex 272 is more efficient and selective than lanthanum(III).

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Polymer inclusion membrane based on cellulose triacetate (CTA) plasticized with 2-nitrophenyl octyl ether

Polimery ◽

10.14314/polimery.2015.118 ◽

2015 ◽

Vol 60 (02) ◽

pp. 118-125

Author(s):

Jakub Rajewski ◽

Paulina Lobodzin ◽

Pawel Gierycz

Keyword(s):

Cellulose Triacetate ◽

Inclusion Membrane ◽

Polymer Inclusion Membrane ◽

Octyl Ether ◽

Nitrophenyl Octyl Ether

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A Polymer Inclusion Membrane for Sensing Metal Complexation in Natural Waters

Applied Sciences ◽

10.3390/app112110404 ◽

2021 ◽

Vol 11 (21) ◽

pp. 10404

Author(s):

Berta Alcalde ◽

Enriqueta Anticó ◽

Clàudia Fontàs

Keyword(s):

Natural Waters ◽

Ethylenediaminetetraacetic Acid ◽

Major Ions ◽

Metal Speciation ◽

Cellulose Triacetate ◽

Metal Complexation ◽

Metallic Ions ◽

Inclusion Membrane ◽

Polymer Inclusion Membrane ◽

Free Metal

Metal speciation studies are of great importance in assessing metal bioavailability in aquatic environments. Functionalized membranes are a simple tool to perform metal chemical speciation. In this study, we have prepared and tested a polymer inclusion membrane (PIM) made of the polymer cellulose triacetate (CTA), the extractant di-(2-ethylhexyl) phosphoric acid (D2EHPA), and the plasticizer 2-nitrophenyloctyl ether (NPOE) as a sensor for Zn and Cu complexation studies. This PIM, incorporated in a device with an 0.01 M HNO3 receiving solution, is shown to effectively transport free metal ions, and it is demonstrated that the presence of ligands that form stable complexes with divalent metallic ions, such as ethylenediaminetetraacetic acid (EDTA) and humic acid (HA), greatly influences the accumulation of the metals in the receiving phase due to the increasing metal fraction complexed in the feed phase. Moreover, the effect of major ions found in natural waters has been investigated, and it is found that the presence of calcium did not decrease the accumulation of either Zn or Cu. Finally, the PIM sensor has been used successfully to evaluate metal complexation in a river water affected by Zn pollution.

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