Author： Zolgharnein Javad Shams Hassan Azimi Gholamhassan
Publisher： Taylor & Francis Ltd
ISSN： 0149-6395
Source： Separation Science and Technology, Vol.42, Iss.10, 2007-01, pp. : 2303-2314
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Abstract
Potassium-dicyclohexyl-18-crown-6 was used as a selective and efficient carrier for the uphill transport of thallium (III) ion as [TlCl4]- complex ion through a chloroform bulk liquid membrane. By using oxalate anion as a metal ion acceptor in the receiving phase, the amount of thallium (III) transported across the liquid membrane after 120 min was 96±2%. The selectivity and efficiencies of thallium transport from aqueous solutions containing Cu2+, Zn2+, Ni2+, Cd2+, Pb2+, Co3+, Mn2+, Cr3+, Mg2+, Ca2+, K+, Na+, and Fe3+ ions were investigated. In the presence of Na3PO4 (0.01 M) at pH=3 as a suitable precipitation agent in the source phase, the interfering effect of Pb2+ ion were diminished drastically.
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