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Titolo:
Separation of Co(II) and Ni(II) ions by supported and hybrid liquid membranes
Autore:
Gega, J; Walkowiak, W; Gajda, B;
Indirizzi:
Czestochowa Tech Univ, Dept Gen Chem, PL-42200 Czestochowa, Poland Czestochowa Tech Univ Czestochowa Poland PL-42200 00 Czestochowa, Poland Univ Wroclaw, Inst Inorgan Chem & Met Rare Elements, PL-50370 Wroclaw, Poland Univ Wroclaw Wroclaw Poland PL-50370 Elements, PL-50370 Wroclaw, Poland
Titolo Testata:
SEPARATION AND PURIFICATION TECHNOLOGY
fascicolo: 1-3, volume: 22-3, anno: 2001,
pagine: 551 - 558
SICI:
1383-5866(20010301)22-3:1-3<551:SOCANI>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLVENT-EXTRACTION; METAL-IONS; SULFATE-SOLUTIONS; SODIUM-SALTS; RECOVERY; NICKEL; COBALT(II); CYANEX-272; SYSTEM; D2EHPA;
Keywords:
separation; Cobalt(II); Nickel(II); supported liquid membranes; hybrid liquid membranes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Gega, J Czestochowa Tech Univ, Dept Gen Chem, Al Armii Krajowej 19, PL-42200 Czestochowa, Poland Czestochowa Tech Univ Al Armii Krajowej 19 Czestochowa Poland PL-42200
Citazione:
J. Gega et al., "Separation of Co(II) and Ni(II) ions by supported and hybrid liquid membranes", SEP PURIF T, 22-3(1-3), 2001, pp. 551-558

Abstract

In this work a competitive transport of an equimolar mixture of cobalt(II)and nickel(TT) across supported and hybrid liquid membranes is presented. In both types of membranes di-2-ethylhexylphosphoric acid (D2EHPA) as well as commercial extractants. i.e. Cyanex(R) 272, 301, and 302 were used as ion carriers. Tn experiments with the supported liquid membranes, the supportapplied for the liquid membrane was microporous, hydrophobic polypropyleneCelgard(R) 2500. This film was soaked in 0.1 M organic solution of an ionic carrier in kerosene. The hybrid liquid membranes were made by compositionof the cation-exchange membranes (CEM) with bulk liquid membrane in the system: GEM-organic phase-GEM. The source aqueous phase was composed of an equimolar mixture of Co(II) and Ni(II) ions in sulfuric acid aqueous solutions. As receiving phase, sulfuric acid solutions of higher concentration thanthe source phase were utilized. The influence of several factors on cationtransport selectivity and effectiveness has been explored. These factors include the effect of (a) acidity of the source and receiving phases, (b) initial concentration of metal ions in the source phase and (c) concentrationof ion carrier in membranes. It is shown that supported and hybrid liquid membranes, containing phosphoorganic acids allow to separate a Co(II)/Ni(II) acidity of the aqueous source phase. In the hybrid liquid membrane processes lower metal ion fluxes than in supported liquid membranes processes were observed. On the other hand, higher separation coefficients for Co(II)/Ni(II) were found for hybrid than for supported liquid membrane processes. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 03:58:30