Selective lead(II) transport in a liquid membrane system with octylsulfanylacetic acid ionophore

The properties of octylsulfanylacetic acid in pertraction of cations, especially lead(II), were investigated. Basic physico-chemical characteristics of the carrier, i.e., the dissociation constant K a and surface tension σ of its solution in 1,2-dichloroethane, were determined. A multimembrane hybri...

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Bibliographic Details
Published in:Desalination 2010-03, Vol.252 (1), p.40-45
Main Authors: Oberta, Andrzej, Wasilewski, Janusz, Wódzki, Romuald
Format: Article
Language:English
Subjects:
Applied sciences
Carrier density
Carriers
Cations
Chemical engineering
Exact sciences and technology
Fluxes
Hybrid systems
Ion exchange
Lead(II)
Liquid membranes
Multimembrane hybrid system
Octylsulfanylacetic acid
Pertraction
Pollution
Surface tension
Transport
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Summary:The properties of octylsulfanylacetic acid in pertraction of cations, especially lead(II), were investigated. Basic physico-chemical characteristics of the carrier, i.e., the dissociation constant K a and surface tension σ of its solution in 1,2-dichloroethane, were determined. A multimembrane hybrid system composed of a liquid membrane and two polymer cation-exchange membranes (Nafion-117) was used as the transport cell. The following order of selectivity was observed: Pb(II) ≫ Ca(II) ≈ K(I), with the separation factors α Ca Pb and α K Pb in the range of 4–45 and 6–47, respectively. The maximum output fluxes of lead(II) varied from 1.7 to 6.87 · 10 − 12 mol cm 2 s − 1 depending on the carrier concentration (0.05–0.1 mol dm − 3 ) in a liquid membrane.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2009.11.004