Numéro |
J. Phys. IV France
Volume 107, May 2003
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|
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Page(s) | 1185 - 1188 | |
DOI | https://doi.org/10.1051/jp4:20030512 |
J. Phys. IV France 107 (2003) 1185
DOI: 10.1051/jp4:20030512
A nex immobilized hydroxypyridinone as a sequestering agent for heavy metal ions
M.A. Santos and R. GrazinaCentro de Quimica Estrutural, Cornplexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Abstract
New chelating solid matrices were developed for the removal of hard heavy metal ions (ex: Fe
3+,
Al
3+.
Pu
4+) from water solutions. They are based on the immobilization of
3-hydroxy-4-pyridinone (HP)
amino-derivatives by covalent binding to epoxy-activated Sepharose gels, through amine linkages. These
HP-functionalized gels are able to strongly chelate those metal ions though formation of 1:1 (metal: HP) complexes.
They possess a much higher stability and capacity for sequestering this type of metal ions and in a wider range of
pH than the corresponding analogous gels, which involve the CNBr-activated sepharose and have amide/isoureia
bonds as the ligand-matrix points of attachment.
© EDP Sciences 2003