Identification of Uranyl Surface Complexes on Ferrihydrite: Advanced EXAFS Data Analysis and CD-MUSIC Modeling

• Published in: Environmental science & technology Vol. 43; no. 5; pp. 1400 - 1406
• Main Authors: Rossberg, André, Ulrich, Kai-Uwe, Weiss, Stephan, Tsushima, Satoru, Hiemstra, Tjisse, Scheinost, Andreas C
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.03.2009
• Subjects: acid; Adsorption; Animal, plant and microbial ecology; Applied ecology; Applied sciences; Aqueous solutions; Atoms & subatomic particles; Biological and medical sciences; Data analysis; Ecotoxicology, biological effects of pollution; Environmental Modeling; Exact sciences and technology; Ferric Compounds - chemistry; Fundamental and applied biological sciences. Psychology; goethite; hematite; Models, Chemical; Molecules; Pollution; Sorption; spectroscopy; Spectrum analysis; Spectrum Analysis - methods; Surface Properties; transformation factor-analysis; u(vi); Uranium; Uranium - chemistry; uranium(vi) sorption; Surface complex; Radioactive pollution; Factor analysis; Pollutant behavior; Ligand; Carbon dioxide; Prediction; Immobilization; Mobility; Identification; Radioisotope; Modeling; EXAFS spectrometry; Sorption; Fine structure; Partial pressure; Uranium; Adsorption; Ionic strength; Speciation

Previous spectroscopic research suggested that uranium(VI) adsorption to iron oxides is dominated by ternary uranyl−carbonato surface complexes across an unexpectedly wide pH range. Formation of such complexes would have a significant impact on the sorption behavior and mobility of uranium in aqueou...