Measurements of the Structural Parameters for the Interaction of Uranium(VI) with Natural and Synthetic Humic Acids using EXAFS

Denecke, Melissa A.; Pompe, S.; Reich, Tobias; Moll, Η.; Bubner, M.; Heise, Katja; Nicolai, R.; Nitsche, Η.

doi:10.1524/ract.1997.79.3.151

Cited by 65 publications

(62 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to IR results and the pH applied for sample preparation, these functional groups are carboxylate groups. Noteworthy is that a U(VI)-HA prepared using a synthetic HA also exhibited the same coordination, despite its having a much higher phenolic OH:carboxylate group ratio than the other HA's investigated, (Denecke et al, 1997;Pompe et al, 1996). This indicates that the HA phenolic OH groups play a subordinate role compared to carboxylate groups in complexing U(VI).…”

Section: Introductionmentioning

confidence: 93%

“…Identical structural parameters for the coordination of U(VI) sorbed onto HA were reported by Denecke et al (1997), whereby HA type, preparation conditions, and cation loadings were all varied. This suggests that the same HA functional groups are responsible for binding U(VI).…”

Section: Introductionmentioning

confidence: 99%

“…Only a small number of studies concerning the structure of radionuclide cation species sorbed onto HA have been reported (Denecke et al, 1997;Pompe et al, 1996;Manceau et al, 1996;Sarret et al, 1997). This is surprising because knowledge of the sorbed species structure can extend our understanding of the cation-HA interaction and thereby help improve predictive capabilities of radionuclide transport models used for risk assessments.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

EXAFS investigation of the interaction of hafnium and thorium with humic acid and Bio-Rex 70

Denecke¹,

Bublitz²,

Kim³

et al. 1999

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

EXAFS investigation of the interaction of hafnium and thorium with humic acid and Bio-Rex 70

Denecke¹,

Bublitz²,

Kim³

et al. 1999

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

“…[85,127] In comparison, the humic acids contain several of the above functional oxygen groups and are indeed among the most complex natural systems. Donor sites are therefore difficult to identify and alternate strategies as complexation by synthetic identified functional groups as xylose, phenylalanine or glycine are needed in order to understand the complex formation.…”

Section: Coordination Of Actinyl Cations With Oxygen Donor Ligandsmentioning

confidence: 99%

Investigating Actinyl Oxo Cations by X‐ray Absorption Spectroscopy

et al. 2003

View full text Add to dashboard Cite

Early actinide elements (from U to Am) have the ability to form linear trans-dioxo complexes with formal valence of the actinide being equal to (V) or (VI). For instance, the ubiquity of the uranyl cation in uranium aqueous chemistry is the basis for its very important industrial and environmental concerns. As a result, the physical chemistry of the actinyl moieties has been the subject of constantly growing investigations. Among all the spectroscopic probes, X-ray absorption spectroscopy is a particularly useful element and energy-selective technique. This article reviews the investigation of molecular actinyl complexes using both XANES and EXAFS tools. The absorption edge features have long been used to characterize the frontier orbitals of the absorbing atom. In the case of actinide cations, the L III edge, located in the hard X-ray region, provides a useful fingerprint of the cation polyhedron. Tentatively, simple molecular orbital considerations together with full multiple scattering simulation codes have MICROREVIEWS: This feature introduces the readers to the author's research through a concise overview of the selected topic. Reference to important work from others in the field is included. Complementary structural data can be obtained in the EXAFS region of the absorption spectrum. In the literature, such molecular systems have been well documented from uranyl aqueous chemistry to neptunyl or plutonyl coordination complexes with oxygen donor ligands. Furthermore, complexation mechanisms upon absorption onto mineral surfaces have been increasingly investigated over the past few years. Overall, contribution of the XAS technique to a better understanding of the actinide bonding is demonstrated from various examples of the literature and the authors' data. Importance of the simulation codes in order to better describe the absorption features is also strongly underlined.

show abstract

“…X-ray absorption ®ne structure (XAFS) measurements of samples with natural uranium have been performed at several synchrotron storage rings in Europe, USA and Japan (Petiau et al, 1986;Kalkowski, Kaindl, Brewer & Krone, 1987;Dent et al, 1992;Chisholm-Brause et al, 1994;Hudson et al, 1995;Allen, Shuh et al, 1996;Giaquinta et al, 1997;Denecke et al, 1997;Den Auwer et al, 1997;Yaita et al, 1998). However, experiments with transuranics have been very limited in number (Kalkowski, Kaindl, Bertram et al, 1987;Petit-Maire et al, 1989;Combes et al, 1992).…”

Section: Synchrotron Radiation Beamlines For Studying Radioactive Matmentioning

confidence: 99%

ROBL – a CRG beamline for radiochemistry and materials research at the ESRF

Matz

Schell

Bernhard

et al. 1999

J Synchrotron Radiat

Self Cite

192

116

View full text Add to dashboard Cite

The paper describes the Rossendorf beamline (ROBL) built by the Forschungszentrum Rossendorf at the ESRF. ROBL comprises two different and independently operating experimental stations: a radiochemistry laboratory for X-ray absorption spectroscopy of non-sealed radioactive samples and a general purpose materials research station for X-ray diffraction and re¯ectometry mainly of thin ®lms and interfaces modi®ed by ion beam techniques.

show abstract

Measurements of the Structural Parameters for the Interaction of Uranium(VI) with Natural and Synthetic Humic Acids using EXAFS

Cited by 65 publications

References 0 publications

EXAFS investigation of the interaction of hafnium and thorium with humic acid and Bio-Rex 70

EXAFS investigation of the interaction of hafnium and thorium with humic acid and Bio-Rex 70

Investigating Actinyl Oxo Cations by X‐ray Absorption Spectroscopy

ROBL – a CRG beamline for radiochemistry and materials research at the ESRF

Contact Info

Product

Resources

About