Conveners
Separation Methods, Speciation 2
- Ljudmila Benedik (Jožef Stefan Institute)
- Guozhong Wu (Shanghai Institute of Applied Physics, Chinese Academy of Sciences)
Description
(session dedicated to the memory of prof. Věra Jedináková-Křížová)
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Prof. Heino Nitsche (UC Berkeley and Lawrence Berkeley National Laboratory)13/05/2014, 10:30Separation Methods, SpeciationInvitedOrdered mesoporous materials are attractive sorbents due to their extremely high surface areas, large pore volumes, open frameworks, and highly-ordered, tunable structures. Ultimately, they could be used for separating actinide and lanthanide ions from assorted solution matrices, as well as from each other. Furthermore, functionalized mesoporous materials may be useful for a variety of...Go to contribution page
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Dr Cory Hawkins (University of California, Irvine)13/05/2014, 10:55Separation Methods, SpeciationVerbalCurrent systems for the separation of actinide and lanthanide cations often employ organophosphorus reagents in combination or in sequence with anionic extractants under acidic conditions. Organophosphorous reagents do not often display large selectivity between trivalent actinides and lanthanides, as a consequence of the similar chemical properties of these elements and may require addition...Go to contribution page
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Ms Lyudmila Tkachenko (Khlopin Radium Institute)13/05/2014, 11:09Separation Methods, SpeciationVerbalSimultaneous recovery of long living radionuclides (cesium, strontium and actinides) from high level liquid waste (HLLW) allows to reduce the total volume of the waste and the costs of waste storage. The UNEX process using solvent based on chlorinated cobalt dicarbollide (CCD), polyethylene glycol and phenyloctyl-N,N-diisobutylcarbamoylmethylene phosphine oxide (CMPO) has been proposed for...Go to contribution page
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Ms Elena Zakharchenko (V.I.Vernadsky Institute of Geochemistry and Analytical Chemistry, Moscow, Russia)13/05/2014, 11:23Separation Methods, SpeciationVerbalRecovery of trivalent actinide and rare earth elements from complicated nitric acid solutions is important and difficult task of radiochemistry. Sorption materials for radionuclide recovery must possess the high sorption efficiency, selectivity of recovery, chemical stability and good kinetic properties. Solid-phase extractants (SPEs) prepared by impregnation of solid supports with ligands are...Go to contribution page
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Dr K.R. Kim (Korea Atomic Energy Research Institute)13/05/2014, 11:37Separation Methods, SpeciationVerbalImmiscible liquid contacting is one the most common and important phenomena in the high temperature pyrochemical systems. Among these processes, an extraction system employing molten LiCl-KCl and liquid Cd metal has been proposed for the pyrochemical recovery of actinides in a waste salt treatment step. Understanding the complex interaction of immiscible fluid dynamics with mass transfer is a...Go to contribution page
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Janelle Droessler (University of Nevada, Las Vegas)13/05/2014, 11:51Separation Methods, SpeciationVerbalThe unique and tunable properties of the second generation moisture-stable ionic liquids (ILs) have generated interest in their applications to the nuclear fuel cycle. Generally, ILs have low vapor pressure, chemical and radiation stability, good conductivity, and importantly, wide electrochemical windows. This beneficial electrochemical property allows for the ability to reach the negative...Go to contribution page