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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 12, Number 5
BKCSDE 12(5)
May 20, 1991

Title	Study on Separation of Heavy Metal Ions in A Neutral Macrocycle-Mediated Emulsion Liquid Membrane System
Author	Moon-Hwan Cho*, Hea-Suk Chun, Jin-Ho Kim, Chang-Hwan Rhee, Si-Joong Kim
Keywords
Abstract	The preferential transport phenomena of neutral cation-anion moieties in neutral macrocycle-facilitated emulsion liquid membrane were described in this study. Emulsion membrane systems consisting of (1) aqueous source phase containing 0.001 M M(NO3)2 (M=Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Sr2+, Cd2+, and Pb2+) (2) a toluene membrane containing 0.01 M ligand (DBN3O2, DA18C6, DT18C6, TT18C6, HT18C6) and the surfactant span 80 (sorbitan monooleate) (3% v/v) and (3) an aqueous receiving phase containing Na2S2O3 or NaNO3 were studied with respect to the disappearence of transition metal ions from the source phase as a function of time. Cation transports for various two component or three component equimolar mixture of transition metal and Cu2+ in a emulsion membrane system incorporating macrocyclic ligand (HT18C6) as carrier were determinded. Cu2+ was transported higher rates than the other M2+ in the mixture solution. Equilibrium constants for cation-source phase co-anion, cation macrocycle and cation-receiving phase reagent interaction are examined as parameters for the prediction of cation transport selectivities
Page	474 - 477
Full Text	PDF

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