Conveners
Solution and Coordination Chemistry of the Actinides
- Claude Degueldre (Paul Scherrer Institut)
Solution and Coordination Chemistry of the Actinides
- Claude Degueldre (Paul Scherrer Institut)
Dr
David Shuh
(LBNL)
20/05/2014, 08:40
Solution and Coordination Chemistry of the Actinides
Oral
Synchrotron radiation (SR) methods have been employed to investigate the chemistry and physics of a wide range of topics in actinide science for several decades. Over this period, the number of SR techniques brought to bear on critical issues in the actinide science field has grown greatly. Several of the results from actinide SR studies have yielded truly unique information that has...
Dr
Ryuhei MOTOKAWA
(Japan Atomic Energy Agency)
20/05/2014, 09:05
Solid State Chemistry and Physics of the Actinides
Oral
The aim of this study is to elucidate a hierarchical structure of Zr(NO3)4･2TBP in octane, formed in an organic phase of the biphasic solvent extraction system, where TBP is tri-n-butyl phosphate.[1] Toward this end, the methods of extended X-ray adsorption fine structure (EXAFS) and small-angle scattering (SAS), exhibiting a good compatibility in the viewpoint of observing length scale, were...
Dr
Stosh Kozimor
(Los Alamos National Laboratory)
20/05/2014, 09:40
Solution and Coordination Chemistry of the Actinides
Oral
Nuclear energy is the most viable alternative to fossil fuel combustion until large-scale renewable energy technologies can be implemented. However, use of nuclear energy is limited by the difficulties in remediation, management, and disposal of nuclear waste and the significant hazard posed by the minor actinides present in spent fuel. Efficient separation of trivalent minor actinides from...
Dr
Shinichi SUZUKI
(Japan Atomic Energy Agency)
20/05/2014, 10:45
Solution and Coordination Chemistry of the Actinides
Oral
In our group, an innovative chemical separation process is proposed for the recovery of all actinide from spent nuclear fuel. One of the main purposes of this process is selective isolation of uranium with branched alkyl type N,N-dialkyl-monoamide(BAMA) and the other is all actinide recovery with hetero donor ligand, phenathroline amide, which composed oxygen and nitrogen atoms.
Since...
38.
Defining orbital mixing standards for quantitative studies of covalency in actinide ligand bonds
Dr
Stefan Minasian
(Lawrence Berkeley National Laboratory)
20/05/2014, 11:20
Solution and Coordination Chemistry of the Actinides
Oral
The exact nature of chemical bonds between actinides and light atoms such as carbon, nitrogen, oxygen, and fluorine is of widespread interest because these interactions control the physics and chemistry of many technologically important processes. Among approaches explored previously, ligand K-edge X-ray absorption spectroscopy (XAS) has emerged as an effective method for quantitatively...
Dr
Christoph Hennig
(The Rossendorf Beamline at ESRF, BP 220, F-38043 Grenoble, France)
20/05/2014, 11:45
Solution and Coordination Chemistry of the Actinides
Oral
Tetravalent actinides and lanthanides form strong complexes with carboxyl containing ligands. Such complexes play an important role in technological processes as well as in biological and environmental systems. So far, most of the thermodynamic data of actinide(IV) and lanthanide(IV) carboxylates are estimated by assuming mononuclear solution species [1]. We applied comprehensive studies with...
Dr
Xavier Gaona
(KIT-INE)
20/05/2014, 12:10
Solution and Coordination Chemistry of the Actinides
Oral
Actinide aqueous chemistry is a relevant, multifold and challenging research field of inorganic chemistry. In the context of nuclear waste disposal, actinides arise as potentially relevant dose contributors in the long term. Because of their specific electronic configuration, several oxidation states of actinides (+III to +VII) can exist in aqueous solution. This imposes a differential...
