Studies on Cadmium Uptake by Hydroxyapatite |
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| Journal | Key Engineering Materials (Volumes 330 - 332) |
|---|---|
| Volume | Bioceramics 19 |
| Edited by | Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu |
| Pages | 123-126 |
| DOI | 10.4028/www.scientific.net/KEM.330-332.123 |
| Citation | Nilce C.C. da Rocha et al., 2007, Key Engineering Materials, 330-332, 123 |
| Online since | February, 2007 |
| Authors | Nilce C.C. da Rocha, Elena Mavropoulos, Marcelo Henrique Prado da Silva, R. C. de Campos, Antonella M. Rossi |
| Keywords | Cadmium (Cd), Complexation, Ion-Exchange, Mechanism |
| Abstract | Cadmium uptake by hydroxyapatite from aqueous solution was studied in time intervals between 2 minutes and 96 hours, using different Cd2+ concentrations (21 to 768 mg L-1). The solution pH after Cd2+ uptake was assessed. Dissolution experiments at fixed pH were performed in order to evaluate the ion exchange process. Cd2+sorption by hydroxyapatite is fast and it happens simultaneously by different mechanisms. Ion exchange is the main mechanism, where mechanism Cd2+ present in aqueous solution replaces Ca2+ from hydroxyapatite structure. |
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