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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 26, Number 6
BKCSDE 26(6)
June 20, 2005 

Selective Transport of Lead(II) through a Bulk Liquid Membrane Using a Cooperative Carrier Composed of Benzylaza-12-crown-4 and Oleic Acid
Sayed Yahya Kazemi,Mojtaba Shamsipur*
Liquid membrane, Lead transport, Benzylaza-12-crown-4, Oleic acid, Thiosulfate
A chloroform membrane system containing a given mixture of benzylaza-12-crown-4 and oleic acid is introduced for the selective and efficient transport of Pb2+ ion. The transport was capable of moving metal ions ‘up-hill’. In the presence of S2O32- ion as a suitable metal ion acceptor in the receiving phase, the amount of lead ion transport across the liquid membrane after 150 minutes is (95.0 ± 1.7)%. The selectivity and efficiency of lead transport from aqueous solution containing Tl+, Ag+, Mg2+, Ca2+, Co2+, Ni2+, Cu2+, Zn2+, Hg2+ and Cd2+ were investigated. In the presence of thiosulfate as a suitable masking agent in the source phase, the interfering effects of Ag+ and Cu2+ were diminished drastically.
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