Hydroxyapatite interactions with copper complexes

Hydroxyapatite was used to remove dilute copper(II) from aqueous solutions containing organic ligands. Both synthetic apatite and natural apatite originating from animal bones retained copper(II) in a flow-through column experiment but lost much of this ability when glycine, ethylenediamine or ethyl...

Full description

Saved in:
Bibliographic Details
Published in:Materials Science & Engineering C 2010-08, Vol.30 (7), p.1060-1064
Main Authors: Fernane, F., Mecherri, M.O., Sharrock, P., Fiallo, M., Sipos, R.
Format: Article
Language:English
Subjects:
Adsorption
Apatite
Biomedical materials
Bones
Complexation
Copper
COPPER COMPOUNDS
Copper(II) ions
CUPRIC IONS
EDTA
Hydroxyapatite
LIGANDS
Speciation
Surgical implants
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Hydroxyapatite was used to remove dilute copper(II) from aqueous solutions containing organic ligands. Both synthetic apatite and natural apatite originating from animal bones retained copper(II) in a flow-through column experiment but lost much of this ability when glycine, ethylenediamine or ethylenediaminetetraacetic acid (EDTA) was present in the solution. The amounts of copper(II) withheld by apatite was compared to the concentrations of free cupric ions present in equilibrium with complexed forms as a function of pH using complex formation constants derived from the IUPAC data base. It was found that most of the copper retained on the apatite was correlated with free metal ion concentrations. The strongest ligand, EDTA, formed a soluble stoichiometric copper(II) complex yet small amounts of copper could be sorbed on the apatite particles. The role of surface complexes remains to be determined to fully explain the metal uptake mechanism.
ISSN:0928-4931
1873-0191
DOI:10.1016/j.msec.2010.05.010