Selective Liquid Membrane Transport of Pd(II) as PdCl2−4 Ion Using Potassium–Dicyclohexyl-18-crown-6 as Carrier

✍ Scribed by Ali Jabbari; Jalil Mohammadi; Mojtaba Shamsipur

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 52 KB
• Volume: 63
• Category: Article
• ISSN: 0026-265X
• DOI: 10.1006/mchj.1999.1783

✦ Synopsis

Potassium-dicyclohexyl-18-crown-6 complex was used as a highly efficient carrier for the transport of palladium as PdCl 4

2Ϫ complex anion through a chloroform bulk liquid membrane. In the presence of thiocyanate ion as a suitable stripping agent in the receiving phase, the amount of palladium transported across the liquid membrane after 2.5 h is 99.2 Ϯ 1.1%. The selectivity of Pd 2ϩ transport from aqueous solutions containing other M n؉ cations such as Mg 2ϩ , Ca 2ϩ , Mn 2ϩ , Co 2ϩ , Ni 2ϩ , Cu 2ϩ , Zn 2ϩ , Pb 2ϩ , Cd 2ϩ , Hg 2ϩ , and Fe 3ϩ was investigated. In the presence of EDTA as a suitable masking agent in the source phase, none of the cations used interfered with palladium transport, even at a M n؉ /Pd 2؉ molar ratio of 10.