GEOC 163 |
| Per Persson1, Marina Kaplun2, Julia Sheals2, and Katarina Zivkovic2. (1) Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden, (2) Department of Chemistry, Inorganic Chemistry, Umeå University, Petrus Leastadius v, SE-901 87 Umeå, Sweden |
| The focus of this paper is the co-adsorption of metal ions and anionic ligands to metal oxide surfaces in aqueous suspensions. Such reactions play important roles in the speciation and reactive transport of metal ions and ligands, and in dissolution/precipitation reactions, in natural aquatic environments. Furthermore, co-adsorption reactions are of importance in industrial processes e.g. mineral processing, paper production, catalyst deposition and activation, and manufacturing of new electrode materials and paints. Our primary interest has been to study how anionic ligands influence the quantitative adsorption of metal ions, and vice versa, and to link the quantitative, macroscopic results to molecular level observations. To accomplish these objectives we have used a multi-technique approach where classical wet-chemical techniques have been combined with molecular probes such as ATR-FTIR and EXAFS spectroscopy. Several examples will be discussed including the co-adsorption of Me(II)/Me(III)-EDTA and Me(II)-herbicide complexes. |
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Interfacial Phenomena: Linking Atomistic and Macroscopic Properties
1:20 PM-5:40 PM, Wednesday, March 31, 2004 Marriott -- Marquis NW, Oral
Division of Geochemistry |