A New Incorporation Mechanism for Trivalent Actinides into Bioapatite: A TRLFS and EXAFS Study
| Autor: | Stephanie Handley-Sidhu, Kiel Holliday, Thorsten Stumpf, Kathy Dardenne, Clemens Walther, Lynne E. Macaskie, Joanna C. Renshaw |
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| Rok vydání: | 2012 |
| Předmět: |
Lanthanide
Actinoid Series Elements Extended X-ray absorption fine structure Chemistry Radiochemistry Surfaces and Interfaces Actinide Condensed Matter Physics Lanthanoid Series Elements Apatite Amorphous solid Durapatite Spectrometry Fluorescence X-Ray Diffraction visual_art Electrochemistry visual_art.visual_art_medium General Materials Science Grain boundary ddc:620 Absorption (chemistry) Spectroscopy Engineering & allied operations |
| Zdroj: | Langmuir, 28, 3845-3851 |
| ISSN: | 1520-5827 0743-7463 3845-3851 |
| Popis: | One of the most toxic byproducts of nuclear power and weapons production is the transuranics, which have a high radiotoxicity and long biological half-life due to their tendency to accumulate in the skeletal system. This accumulation is inhomogeneous and has been associated with the chemical properties and structure of the bone material rather than its location or function. This suggests a chemical driving force to incorporation and requires an atomic scale mechanistic understanding of the incorporation process. Here we propose a new incorporation mechanism for trivalent actinides and lanthanides into synthetic and biologically produced hydroxyapatite. Time-resolved laser fluorescence spectroscopy and extended X-ray absorption fine structure have been used to demonstrate that trivalent actinides and lanthanides incorporate into the amorphous grain boundaries of apatite. This incorporation site can be used to explain patterns in uptake and distribution of radionuclides in the mammalian skeletal system. |
| Databáze: | OpenAIRE |
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