Transport study of palladium through a bulk liquid membrane using hexadecylpyridinium as carrier

Hexadecylpyridinium bromide (HDPB) was used as an excellent carrier for the uphill transport of palladium(II) as PdBr 4 2− complex anion through a chloroform bulk liquid membrane. The transport efficiency of palladium(II) by HDPB was investigated under various experimental conditions such as pH and...

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Vydáno v:Separation and purification technology Ročník 28; číslo 3; s. 173 - 180
Hlavní autoři: Alizadeh, Naader, Salimi, Shabnam, Jabbari, Ali
Médium: Journal Article
Jazyk:angličtina
Vydáno: Amsterdam Elsevier B.V 01.09.2002
Elsevier Science
Témata:
Bulk liquid membrane
Cationic surfactant
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Hexadecylpyridinium
Membranes
Palladium transport
Separation
Bulk liquid membrane
Cationic surfactant
Separation
Palladium transport
Hexadecylpyridinium
Stripping
Divalent metal Complexes
Separation capacity
Chloroform
Palladium II Complexes
Anionic complex
Liquid membrane
Selectivity
Transition metal Complexes
Experimental study
Solvent extraction
Mass transfer
Time dependence
Medium effect
Concentration effect
pH
Thiourea
Platinoid Complexes
Facilitated transport
ISSN:1383-5866, 1873-3794
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Shrnutí:Hexadecylpyridinium bromide (HDPB) was used as an excellent carrier for the uphill transport of palladium(II) as PdBr 4 2− complex anion through a chloroform bulk liquid membrane. The transport efficiency of palladium(II) by HDPB was investigated under various experimental conditions such as pH and concentration of NaBr in source phase, concentration of surfactant (HDPB) in membrane, HBr and thiourea (as stripping agent) concentration in receiving phase and equilibrium time. In the optimum conditions, transport efficiency of palladium(II) for the ten replicate measurements after 110 min was 97.9±1.1%. The selectivity of palladium(II) transport from aqueous solutions containing Sr 2+, Ca 2+, Ba 2+, Co 2+, Ni 2+, Zn 2+, Cu 2+, Cd 2+, Mn 2+ and Hg 2+ ions was investigated and found that none of cations used, interfere the palladium(II) transport (at M n+/Pd 2+ mole ratio of 10).The proposed method has been applied to separation of palladium in Silicon–Alumina catalysts. The transport efficiency after 120 min was 98%.
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ISSN:1383-5866
1873-3794
DOI:10.1016/S1383-5866(02)00003-5