RadChem 2010

Session

Separation Methods, Speciation 1

SEP1

22 Apr 2010, 08:00

Casino Conference Centre

300. The influence of the side groups of the BTP and BTBP type ligands on liquid-liquid extraction of actinides and lanthanides

Dr Teodora Retegan (Chalmers University of Technology)

22/04/2010, 08:00

Separation Methods, Speciation

Verbal

Fossil fuels are no longer a choice for energy production, both because of their diminishing availability and the bi-products of their combustion processes. A possibility to replace the fossil fuels would be utilization of nuclear power. No green-house gases are produced, but as any industry, it generates wastes. A proper plan for reusing valuable nuclides, both by preparing another kind of...

18. Solvent extraction studies for the separation of radioarsenic, radiogermanium and radiogallium

Mr Mohamed Shehata (Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany)

22/04/2010, 08:15

Separation Methods, Speciation

Verbal

Solvent extraction techniques were developed to separate As-72 from bulk amounts of proton-irradiated germanium dioxide targets, Ge-68 from proton-irradiated gallium(III) oxide targets and Ga-68 from parent Ge-68. Several methods have been reported to isolate arsenic radionuclides from irradiated Ge and germanium dioxide targets [1,2]. In this work the germanium dioxide target, irradiated...

322. Novel solid-phase extractants for radionuclide preconcentration

Ms Olga Mokhodoeva (Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences)

22/04/2010, 08:30

Separation Methods, Speciation

Verbal

Preconcentration of radionuclides is a necessary stage for their accurate determination in aqueous natural and technological solutions. Sorption methods are the most perspective for selective recovery and separation of radionuclides from other elements. Various sorption materials containing complexing groups have been widely applied due to their selectivity and high degree of recovery. It is...

302. Bentonite stability and migration behavior of some critical radionuclides

Mrs Věra Jedináková-Křížová (Institute of Chemical Technology)

22/04/2010, 08:45

Separation Methods, Speciation

Verbal

The contribution is focused on geotechnical, chemical, geochemical and mineralogical research of bentonite stability with the aim to determine the effect of saturation medium composition and loading by heat on bentonite stability. The main part the research is directed to the experimental results of bentonite and bentonite leachate samples obtained for the bentonite interaction under...

20. Speciation of curium(III) and europium(III) in human urine samples

Ms Anne Heller (Forschungszentrum Dresden-Rossendorf, Institute of Radiochemistry)

22/04/2010, 09:00

Separation Methods, Speciation

Verbal

Due to their radiation and heavy metal properties, radionuclides represent a serious health risk to humans in case of incorporation. To understand their toxicity, transport, deposition and elimination in the human organism, it is therefore crucial to elucidate their chemical behavior and properties on a molecular level. For trivalent actinides originating from nuclear power plants knowledge...

23. Determination of ²³⁷Np, ⁹³Zr and other long-lived radionuclides in medium- and low-level radioactive waste samples

Mr Szabolcs Osvath (BME NTI (Budapest University of Technology and Economics, Institute of Nuclear Techniques))

22/04/2010, 09:15

Separation Methods, Speciation

Verbal

The majority of long-lived radionuclides produced in the nuclear fuel cycle can be regarded as “difficult to determine nuclides” due to the low activities and/or the absence of gamma-radiations of medium or high energies in the decay schemes. Most isotopes of actinoides are alpha-emitters, Sr-90 (fission product) and Zr-93 (activation product) emit almost exclusively beta-particles, Nb-93m...