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Selective solid–liquid extraction of cations using solid‐phase polyamides with crown ether moieties as cation host units
Author(s) -
Calderón Verónica,
Serna Felipe,
García Félix,
de la Peña José L.,
García José M.
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26828
Subject(s) - polyamide , chemistry , lanthanide , crown ether , extraction (chemistry) , acetonitrile , aqueous solution , inorganic chemistry , metal ions in aqueous solution , selectivity , solid phase extraction , uranyl , alkaline earth metal , metal , polymer chemistry , organic chemistry , ion , catalysis
This work describes the interaction of alkaline, alkaline earth, transition metal, heavy metal, and lanthanide cations from nitrate solutions with synthetic polyamides. The polyamides have pendant structures acting as cation host moieties. The host subgroups are benzo‐12‐crown‐4, benzo‐15‐crown‐5, benzo‐18‐crown‐6, and the three dipodal counterparts of the three benzo‐crown units. This interaction has been analyzed in terms of competitive polyamide solid‐phase extraction of nitrate cations from aqueous or acetronitrile solutions. The solid‐phase extraction of water or acetonitrile solutions of alkaline, alkaline earth, transition metal, heavy metal, and lanthanide ions using solid‐phase polyamides is performed with a degree of selectivity. Higher selectivity is observable in the extraction of Pb(II) from a set of heavy metal ions in water and acetonitrile solutions, and the extraction of Cr(III) from a set of transition metals in acetonitrile solutions. It is a noteworthy result, which along with the reusability of the solid‐phase polyamides points to potentially successful applications in the field of environmental chemistry: the decontamination and elimination of poisoning cations, the separation and modification of cation mixtures, and the development of fixed‐site carrier membranes for selective transport or manufacture of cation‐sensitive sensors. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007