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1

Synthesis of Polymer Inclusion Membranes based on Cellulose Triacetate for Recovery of Lanthanum(III) from Aqueous Solutions

Makowka Adam, Pospiech Beata

Autex Research Journal

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2019

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Vol. 19, no. 3

288--292

EN

Polymer inclusion membrane (PIM) containing cellulose triacetate (CTA) as a polymer matrix and 2-nitrophenyl octyl ether (NPOE) as a plasticizer was developed. This membrane also contained di(2-ethylhexyl)phosphoric acid (D2EHPA) and tributyl phosphate (TBP) as the carriers of metal ions. The facilitated transport of lanthanum(III) from aqueous nitrate(V) solutions across PIM was studied. It was observed that metal ions were transported from the source phase into 2M H2SO4 as the receiving phase. The transport through PIM with D2EHPA as the ion carrier was found as the more effective method of lanthanum(III) removal from the aqueous solution than transport through PIM with TBP as the ion carrier.

2

Highly efficient facilitated membrane transport of palladium(ii) ions from hydrochloric acid solutions through plasticizer membranes with cyanex 471X

Pospiech B.

Physicochemical Problems of Mineral Processing

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2015

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Vol. 51, iss. 1

281--291

EN

In this work the efficient recovery of palladium(II) ions from hydrochloric acid solutions by transport through polymer inclusion membranes (PIMs) was studied. The membrane consisted of cellulose triacetate (CTA) as the polymeric support, o-nitrophenyl octyl ether (ONPOE) as the plasticizer and Cyanex 471X (triisobutylphosphine sulphide) as the ion carrier. The effect of various parameters on the transport kinetics and the recovery factor of palladium(II) was studied, including concentration of Cyanex 471X in the membrane, hydrochloric acid concentration in the source phase and potassium thiocyanate (KSCN) concentration in the receiving phase.

3

The use of 1-alkylimidzoles for selective separation of zinc ions in the transport process across a polymeric inclusion membrane

Radzyminska-Lenarcik E., Ulewicz M.

Physicochemical Problems of Mineral Processing

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2014

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Vol. 50, iss. 1

131--142

EN

The transport of Zn(II) ions from different aqueous nitrate(V) source feeding phases (cMe = 0.001 mol/dm3, pH 6.0) across polymer inclusion membranes (PIMs) doped with 1-alkylimidazole as an ion carrier was reported. Alkyl substituents in position 1 of imidazole ring have an effect on hydrophobic properties of the carriers and the initial flux of the transported metal ions. The membranes were characterized by an atomic force microscopy (AFM). The results show that the Zn(II) ions could effectively be separated from other transition metal cations such as Co(II) and Ni(II) from different equimolar ion mixtures. Also, the thermal stability of PIM doped with 1-decylimidazole was studied in replicate experiments. The highest separation coefficients for the Zn(II)/Co(II) and Zn(II)/Ni(II) systems, equal to 9.4 and 11.9 were recorded for the equimolar Zn(II)-Co(II)-Ni(II) mixture for 1-hexylimidazole as a carrier, while using 1-decylimidazole resulted in the highest values of initial flux of the Zn(II) ions transport across the polymeric membrane.

4

Application of supported and polymer membrane with 1 decyl-2-methylimidazole for separation of transition metal ions

Ulewicz M., Radzyminska-Lenarcik E.

Physicochemical Problems of Mineral Processing

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2012

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Vol. 48, iss. 1

91-102

EN

The facilitated transport of Cu(II), Zn(II), Co(II), and Ni(II) ions from different aqueous nitrate source phases (cMe = 0.001M, pH 6.0) across polymer inclusion membranes (PIMs) consisting of cellulose triacetate (support) and 2-nitrophenylpentyl ether (plasticizer) doped with 1-decyl-2-methylimidazol as ion carrier was reported. The membrane is characterised by atomic force microscopy (AFM) and thermal analysis (DTA and TG) techniques. The results show that Cu2+ can be separated very effectively from other transition metal cations as Zn2+, Co2+, and Ni2+ from different equimolar mixtures of these ions. The recovery factor of Cu2+ ions during transport across PIM from different mixture is equal to 92-95.1%. The comparative transport of Cu(II), Zn(II), Co(II), and Ni(II) ions from aqueous nitrate source phase across supported (SLMs) containing 1-decyl-2-methylimidazol as ion carrier was reported.

5

Transport of metal ions across polymer inclusion membrane with 1-alkylimidazole

Ulewicz M., Radzymińska-Lenarcik E.

Physicochemical Problems of Mineral Processing

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2011

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Vol. 46

119-130

EN

The facilitated transport of copper(II), zinc(II), cobalt(II), and nickel(II) ions across polymer inclusion membranes (PIMs), which consist of cellulose triacetate as polymeric support, o-nitrophenyl pentyl ether as plasticizer and 1-alkylimidazole as ion carrier was reported. PIM was characterized by using atomic force microscopy (AFM) technique. The results show that Cu2+ can be separated very effectively from others heavy and transition metal cations as Zn2+, Co2+, and Ni2+ (at concentration of 10-3 M each). Alkyl substituents in position 1 of imidazole ring have an effect on hydrophobic properties and the initial flux of the transported metal ions. Also, the influence of the chloride ions concentration on the separation process was investigated. To explain the mechanism of membrane transport the diffusion of metal ions complexes with 1-alkylimidazole was also measured.

PL

Zbadano selektywność transportu jonów Cu(II), Zn(II), Co(II) i Ni(II) (cMe=0,001M, każdy) przez polimerowe membrany inkluzyjne składające się z trójoctanu celulozy (suportu), eteru o-nitrofenylooktylu (plastyfikatora) i przenośnika jonów (1 alkiloimidazole). Polimerowa membrana została scharakteryzowana przy pomocy mikroskopii sił atomowych (AFM). Wykazano, że podstawnik alkilowy w pozycji 1 pierścienia imidazolu zmieniając własności hydrofobowe przenośnika wpływa na strumień początkowy transportu jonów metali. Wartości strumienia początkowego transportu jonów przy użyciu przenośnika 1 i 2 maleją w szeregu: Cu(II) > Zn(II) > Co(II) > Ni(II), natomiast dla 3 - 5 w szeregu: Cu(II) > Zn(II) > Ni(II), Co(II). Strumień transportu Cu(II) wzrasta w szeregu użytych przenośników: 1 < 2 < 3 < 4 ɝ, osiągając najwyższą wartość 6,36 µµmol/m2 · s (dla 5). Na selektywność transportu wpływ również stężenie jonów chlorkowych w fazie zasilającej. Czynnikiem limitującym szybkości transportu Cu2+ przez PIM jest współczynnik dyfuzji kompleksu przenoszonego kationu przez membranę.

6

Transport of lead across polymer inclusion membrane with p- tert -butylcalix[4]arene derivative

Ulewicz M., Lesińska U., Bocheńska M.

Physicochemical Problems of Mineral Processing

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2010

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Vol. 44

245-256

EN

The facilitated transport of lead(II) across polymer inclusion membranes (PIMs), which consist of cellulose triacetate as polymeric support, o-nitrophenyl octyl ether as plasticizer and 25, 26, 27, 28 -Tetrakis(N-hydroxy-N-methylcarbamoylmethoxy)-p-tert-butylcalix[4]aren (L) as ion carrier was reported. PIM was characterized by using atomic force microscopy (AFM). The results show that Pb2+ can be separated very effectively from other heavy and transition metal cations as Zn2+, Cd2+, Co2+, Ni2+ (each at a concentration of 10-3 M). The rate limiting step in the transport of Pb2+ across PIM doped with calix[4]aren derivative may be the diffusion coefficient of the carrier cation complex across the membrane. The stability of PIM with p-tert-butylcalix[4]aren derivative was described using Danesi's thermodynamic model. The apparent partition constant of the carrier was experimentally estimated and compared with different carriers.

PL

Opisane zostały ułatwienia w transporcie jonów ołowiu(II) przez polimerową membranę inkluzyjną (PIMs), która składała się z trój octanu celulozy jako polimerowego suportu, eteru o-nitrofenylooktylu jako plastyfikatora i 25,26,27,28 tetra-(N-hydroksy-N-metylokarbonylo metoksy)-p-tert-butylokaliks[4]arenu jako nośnika jonów. Polimerowa membrana inkluzyjna została scharakteryzowana przy pomocy mikroskopu sił atomowych (AFM). Otrzymane wyniki wskazują, że jony Pb2+ mogą być efektywnie oddzielane od innych kationów metali ciężkich i przejściowych takich jak Zn2+, Cd2+, Co2+, Ni2+ (przy stężeniach rzędu 10-3M). Czynnikiem limitującym szybkość transportu jonów Pb2+ przez polimerową membranę inkluzyjna wypełnioną kaliks[4]arenem może być współczynnik dyfuzji kompleksu przenoszącego kation przez membranę. Stabilność membrany (PIM) z p-tert-butylokaliks[4]arenem była opisana przy użyciu modelu termodynamicznego Danesi. Odpowiednie stałe przenoszenia wyznaczone w sposób eksperymentalny zostały porównane z innymi stałymi przenoszenia.