Conveners
RCH 1
- Jan Bárta (Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering)
- Christian Ekberg (Nuclear Chemistry, Chalmers)
In nuclear fuel reprocessing, after separation of uranium and plutonium using the PUREX process, minor actinides (americium and curium) are the main contributors to the long term radiotoxicity and heat load of the spent fuel. Therefore, new processes have been developed to separate americium and curium using polyaminocarboxylic acids as selective complexant. Due to the presence of radioactive...
Coumarins reaction ability with free radicals was studied. Antioxidant properties for coumarin, esculetin, esculin in reaction with carbon-centered hydroxyethyl radical, superoxide anion radical are shown. The influence of zinc ions on the change of coumarins reaction ability is investigated.
Separation of minor actinides (MA, i.e. americium, curium and neptunium) from the highly radioactive raffinate originating from spent nuclear fuel reprocessing, followed by an efficient transmutation of Am could contribute to a significant decrease of the long-term radiotoxicity and heat load of vitrified highly radioactive waste (1).
The effect of 60Co gamma radiation on two different...
Due to the pollution of industrial effluents with toxic metals, often in ionic forms, and their spreading to the environment, much work is currently underway to develop the most efficient methods of separation of heavy metals (e.g. mercury, cadmium, chromium or arsenic) from aqueous solutions.
Arsenic is known for its very high toxicity. Its removal by conventional methods, aimed largely at...
We have observed the formation of OH radicals in aqueous solutions under the effect of 253.7 nm (4.89 eV) UV radiation delivered from a low-pressure Hg-lamp [1]. By combination of chemical actinometry (iodide-iodate system) with the tools conventionally used for the characterization of radical yields during radiolysis of aqueous solutions (a fluorescence dosimeter - coumarin-3-carboxylic acid...
