Record number :
1354084
Title of article :
Heavy metal separation with polymer inclusion membranes
Author/Authors :
Carmelo Sgarlata، نويسنده , , Giuseppe Arena، نويسنده , , Elisa Longo، نويسنده , , Dongmei Zhang، نويسنده , , Yangfei Yang، نويسنده , , Richard A. Bartsch، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
8
From page :
444
To page :
451
Abstract :
Using functionalized calix[4]arene carrier 1 in a PIM system, Hg(II) is transported with high selectivity from acidic aqueous source phase solutions of Cd(II), Hg(II) and Pb(II) with high NaNO3 concentration into aqueous receiving solutions containing EDTA. To gain insight into this transport selectivity, complexation studies of the three heavy metal perchlorate species by ligand 1 were conducted in acetonitrile. Although 1:1 complexation of the divalent heavy metal cation by 1 was observed for Cd(II), the stoichiometries were more complicated for Hg(II) and Pb(II). Selective Hg(II) transport across the PIM is attributed to both the strength and stoichiometry of the metal ion-carrier species forming at the source phase-membrane interphase and its stripping from the membrane into the receiving phase by EDTA.
Keywords :
Selective transport , Calixarenes , heavy metals , Species distribution
Journal title :
Journal of Membrane Science
Serial Year :
2008
Link To Document :
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