RadChem 2014

Session

Separation Methods, Speciation 2

SEP-2

13 May 2014, 10:30

Casino Conference Centre

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)

276. Actinide and Lanthanide Interactions with Engineered Mesoporous Materials

Prof. Heino Nitsche (UC Berkeley and Lawrence Berkeley National Laboratory)

13/05/2014, 10:30

Separation Methods, Speciation

Invited

Ordered 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...

145. Investigations of water-soluble salicylaldimine-based ligands for the separation of actinyl and non-actinyl cations

Dr Cory Hawkins (University of California, Irvine)

13/05/2014, 10:55

Separation Methods, Speciation

Verbal

Current 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...

278. Simultaneous extraction of radionuclides with crown ethers and N,N,N’,N’-tetraalkyl diglycolamides mixtures in fluorinated diluents

Ms Lyudmila Tkachenko (Khlopin Radium Institute)

13/05/2014, 11:09

Separation Methods, Speciation

Verbal

Simultaneous 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...

213. Recovery of actinides and lanthanides on solid-phase extractants from nitric acid solution

Ms Elena Zakharchenko (V.I.Vernadsky Institute of Geochemistry and Analytical Chemistry, Moscow, Russia)

13/05/2014, 11:23

Separation Methods, Speciation

Verbal

Recovery 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...

221. Pyrochemical Extraction Analysis of an Immiscible Molten LiCl-KCl/Cd System

Dr K.R. Kim (Korea Atomic Energy Research Institute)

13/05/2014, 11:37

Separation Methods, Speciation

Verbal

Immiscible 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...

175. Direct Dissolution and Electrochemical Studies of f-elements in Ionic Liquid

Janelle Droessler (University of Nevada, Las Vegas)

13/05/2014, 11:51

Separation Methods, Speciation

Verbal

The 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...