| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 593781 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2013 | 6 Pages |
Organo-apatites were prepared by in situ incorporation of adipic acid, citric acid and nitrilotris(methylene)triphosphonic acid. The resulting powders consist of poorly-crystalline nanosized apatites with organic content in the 2–8 wt% range. All materials exhibit faster sorption rate and higher sorption capacity for Pb2+ in acidic solutions compared to the pure apatite. This is especially true for carboxylate-modified powders that exhibit the highest-to-date maximum lead sorption capacity (≈ g g−1). These properties can be correlated with the ability of introduced organic moieties to modify the acido-basic properties of the material surface and to form stable complexes with Pb2+.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Carboxylic acids and aminophosphonate were associated with hydroxyapatite in situ. ► Organics could lead to a 5-fold increase of the maximum capacity for Pb2+ sorption. ► Lead sorption was correlated to the acido-basic properties of the hybrid interface.
