Title : ( Transport Study of Metal Cations Through a Bulk LiquidMembrane Using Benzo-18-crown-6 as an Ionophore )
Authors: Gholam hossein Ronaghi , Mohammad Hossein Arbab Zavar , Elham Fahmideh Rad ,
Full TextAbstract
The transport experiments of Cr3+, Co2+, Cu2+, Zn2+, Cd2+, Ag+ and Pb2+ metal cations were carried out by benzo-18-crown-6 (B18C6) using chloroform (CHCl3), 1,2-dichloroethane (1,2-DCE), dichlorometh-ane(DCM), nitrobenzene (NB), chloroform-nitrobenzene (CHCl3-NB) and chloroform-dichloromethane (CHCl3-DCM) binary mixed solvents as liquid membranes. The aqueous source phase consisted of a buffer solution(CH3COOH/CH3COONa) at pH = 5 and containing an equimolar mixtureof these 7 metal cations. The organic phase contained the macrocycleligand, benzo-18-crown-6 (B18C6) as an ionophore and the receiving phase consisted of a buffer solution (HCOOH/HCOONa) at pH = 3.The obtained results show that benzo-18-crown-6 is a highly selective ionophore for Pb2+ cation. The sequence of transport efficiency for Pb2+cation in organic solvents was found to be : DCM > NB > 1,2-DCE >CHCl3. The influence of the stearic acid, palmitic acid and oleic acid in the membrane phase on the ion transport was investigated. A non-linear behaviour was observed for variation of the transport rate of Pb2+ cationvs. the composition of CHCl3-NB and CHCl3-DCM binary mixtures.
Keywords
, Bulk liquid membrane transport, Benzo-18-crown-6, Cr3+, Co2+, Cu2+, Zn2+, Cd2+, Ag+, Pb2+ metal cations, Chloroform, 1, 2-Dichloroethane, Dichloromethane, Nitrobenzene, Chloroformnitrobenzene, Chloroform-dichloromethane binary mixtures.
@article{paperid:1011487,
author = {Ronaghi, Gholam Hossein and Arbab Zavar, Mohammad Hossein and Fahmideh Rad, Elham},
title = {Transport Study of Metal Cations Through a Bulk LiquidMembrane Using Benzo-18-crown-6 as an Ionophore},
journal = {Asian Journal of Chemistry},
year = {2009},
volume = {21},
number = {2},
month = {February},
issn = {0970-7077},
pages = {1389--1399},
numpages = {10},
keywords = {Bulk liquid membrane transport; Benzo-18-crown-6;Cr3+; Co2+; Cu2+; Zn2+; Cd2+; Ag+; Pb2+ metal cations; Chloroform;1;2-Dichloroethane; Dichloromethane; Nitrobenzene; Chloroformnitrobenzene;
Chloroform-dichloromethane binary mixtures.},
}
%0 Journal Article
%T Transport Study of Metal Cations Through a Bulk LiquidMembrane Using Benzo-18-crown-6 as an Ionophore
%A Ronaghi, Gholam Hossein
%A Arbab Zavar, Mohammad Hossein
%A Fahmideh Rad, Elham
%J Asian Journal of Chemistry
%@ 0970-7077
%D 2009
