Understanding Humic Acid / Zr(IV) Interaction - A Spectromicroscopy Approach

Journal Article · Fri Feb 02 00:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2644471· OSTI ID:21054590

Rothe, Joerg; Plaschke, Markus; Denecke, Melissa A ^[1]

---

1. Forschungszentrum Karlsruhe, Institut fuer Nukleare Entsorgung, P.O. Box 3640, D-76021 Karlsruhe (Germany)

Complexation of Zr(IV) by humic acid (HA) and polyacrylic acid (PAA) is investigated from the point of view of the organic ligand. STXM Spectromicroscopy and C 1s-NEXAFS point to different interaction mechanisms between Zr(IV) cations and oxo/hydroxo colloids and PAA. Under conditions where the metal aquo ion is stable, strong complexes are formed. In contrast, unspecific surface coating is identified when PAA is contacted with Zr(IV) oxo/hydroxide colloids. HA exhibits similar C 1s-NEXAFS features indicating a complexation reaction.

• OSTI ID: 21054590
• Journal Information: AIP Conference Proceedings, Vol. 882, Issue 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644471; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
CATIONS
COLLOIDS
FINE STRUCTURE
HUMIC ACIDS
HYDROXIDES
ION-MOLECULE COLLISIONS
LIGANDS
MICROSCOPY
POLYMERS
SURFACE COATING
X-RAY SPECTROSCOPY
ZIRCONIUM
ZIRCONIUM IONS