Uptake of metal ions by a silica-based tetraphenylporphyrin sorbent
The [5-p-carboxyphenyl-10,15,20-triphenyl]porphyrin (TPP) covalently attached to aminopropyl silica gel was examined with respect to the sorption of transition metal ions. The distribution coefficients (K{sub d}) are reported for some metal ions with this new sorbent as a function of pH. It was found that in optimum pH conditions the sorption of Cu(II) and Fe(III) is much faster than that of Co(II) and Cr(III). The binding of metal ions is strongly affected by the presence of various species accelerating the complex formation. The application of porphyrin ligands for preconcentration and metal-matrix separation was also examined using complex formation in solution coupled with an anion exchange resin and column chelation procedure, e.g. sorption of metal on an anion exchanger previously loaded with tetra(4-carboxyphenyl)porphyrin.
- Research Organization:
- Univ. of Warsaw (PL)
- OSTI ID:
- 20000561
- Journal Information:
- Solvent Extraction and Ion Exchange, Vol. 17, Issue 5; Other Information: PBD: Sep 1999; ISSN 0736-6299
- Country of Publication:
- United States
- Language:
- English
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