期刊
JOURNAL OF MEMBRANE SCIENCE
卷 323, 期 2, 页码 444-451出版社
ELSEVIER
DOI: 10.1016/j.memsci.2008.07.004
关键词
selective transport; calixarenes; species distribution; heavy metals
资金
- Division of Chemical Sciences, Geosciences, and Biosciences and Biosciences of the Office of Basic Energy Sciences of the U.S. Department of Energy [DE-FG02-09ER14416]
- Universita di Catania
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. (c) 2008 Elsevier B.V. All rights reserved.
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