scholarly journals Extraction of minor actinides, lanthanides and other fission products by silica-immobilized BTBP/BTPhen ligands

2017 ◽  
Vol 53 (28) ◽  
pp. 4010-4013 ◽  
Author(s):  
Ashfaq Afsar ◽  
Petr Distler ◽  
Laurence M. Harwood ◽  
Jan John ◽  
James Westwood
Keyword(s):  
Fission Products ◽  
Silica Gels ◽  
Minor Actinides ◽  
Functionalized Silica

Novel BTBP [bis-(1,2,4-triazin-3-yl)-2,2′-bipyridine]/BTPhen [bis-(1,2,4-triazin-3-yl)-1,10-phenanthroline] functionalized silica gels have been developed to extract minor actinides, lanthanides and other fission products.

Separation of Trivalent Minor Actinides from Fission Products Using Single R-BTP Column Extraction Chromatography

2011 ◽  
Vol 48 (6) ◽  
pp. 855-858 ◽  
Author(s):  
Tatsuro MATSUMURA ◽  
Kazumi MATSUMURA ◽  
Yasuji MORITA ◽  
Yoshikazu KOMA ◽  
Yuichi SANO ◽  
...  
Keyword(s):  
Extraction Chromatography ◽  
Fission Products ◽  
Minor Actinides ◽  
Column Extraction

Zirconia Inert Matrix Fuel for Plutonium and Minor Actinides Management in Reactors and as an Ultimate Waste Form

2008 ◽  
Vol 1104 ◽  
Author(s):  
Claude Degueldre ◽  
Wolfgang Wiesenack
Keyword(s):  
Near Field ◽  
Fission Products ◽  
Minor Actinides ◽  
Spent Fuel ◽  
Geological Disposal ◽  
Inert Matrix Fuel ◽  
Inert Matrix ◽  
Fuel Pellets ◽  
Reducing Conditions ◽  
Deep Geological Disposal

AbstractA plutonia stabilised zirconia doped with yttria and erbia has been selected as inert matrix fuel (IMF) at PSI. The results of experimental irradiation tests on yttria-stabilised zirconia doped with plutonia and erbia pellets in the Halden research reactor as well as a study of zirconia solubility are presented. Zirconia must be stabilised by yttria to form a solid solution such as MAz(Y,Er)yPuxZr1-yO2-ζ where minor actinides (MA) oxides are also soluble. (Er,Y,Pu,Zr)O2-ζ (with Pu containing 5% Am) was successfully prepared at PSI and irradiated in the Halden reactor. Emphasis is given on the zirconia-IMF properties under in-pile irradiation, on the fuel material centre temperatures and on the fission gas release. The retention of fission products in zirconia may be stronger at similar temperature, compared to UO2. The outstanding behaviour of plutonia-zirconia inert matrix fuel is compared to the classical (U,Pu)O2 fuels. The properties of the spent fuel pellets are presented focusing on the once through strategy. For this strategy, low solubility of the inert matrix is required for geological disposal. This parameter was studied in detail for a range of solutions corresponding to groundwater under near field conditions. Under these conditions the IMF solubility is about 109 times smaller than glass, several orders of magnitude lower than UO2 in oxidising conditions (Yucca Mountain) and comparable in reducing conditions, which makes the zirconia material very attractive for deep geological disposal. The behaviour of plutonia-zirconia inert matrix fuel is discussed within a burn and bury strategy.

Calix[4]pyrrole-Functionalized Silica Gels: Novel Supports for the HPLC-Based Separation of Anions

2000 ◽  
pp. 238-254 ◽  
Author(s):  
Jonathan L. Sessler ◽  
John W. Genge ◽  
Philip A. Gale ◽  
Vladimír Král
Keyword(s):  
Silica Gels ◽  
Functionalized Silica

Development of a simplified separation process of trivalent minor actinides from fission products using novel R-BTP/SiO2-P adsorbents

2012 ◽  
Vol 49 (3) ◽  
pp. 334-342 ◽  
Author(s):  
Shigekazu Usuda ◽  
Yuezhou Wei ◽  
Yuanlai Xu ◽  
Zheng Li ◽  
Ruiqin Liu ◽  
...  
Keyword(s):  
Fission Products ◽  
Separation Process ◽  
Minor Actinides

scholarly journals Adsorption Separation of Arsenic(III) and Arsenic(V) using Functionalized Silica Gels

2021 ◽  
Vol 14 (4) ◽  
pp. 477-488
Author(s):  
Elena V. Borodina ◽  
◽  
Svetlana L. Didukh-Shadrina ◽  
Vladimir N. Losev ◽  
Anatoly K. Trofimchuk ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Separation Efficiency ◽  
Inorganic Arsenic ◽  
Optical Emission ◽  
Arsenic Species ◽  
Silica Gels ◽  
Emission Spectrometry ◽  
Functionalized Silica ◽  
Inductively Coupled ◽  
Ph Range

A method for the adsorption separation of inorganic arsenic species (As(III)/As(V)) using sequentially connected preconcentrating columns filled with functionalized silica gels and their determination by inductively coupled plasma optical emission spectrometry was proposed. As(V) was effectively retained at pH 3.5–6.5 by an adsorbent containing groups of quaternary phosphonium bases on the surface and exhibiting the properties of an anion exchanger. In this pH range, As(III) was not extracted, which made it possible to separate As(V) from As(III). As(III) was retained in a wide pH range of 1–6 by a complexing adsorbent containing mercapto groups on the surface. Adsorbed As(V) was quantitatively eluted from the surface with 1M HNO3, and As(III) – with 5 % unithiol solution in 2M HCl. The use of «non-aggressive» eluents allows us to reuse adsorbents for preconcentration of As(III) and As(V) at least 5 times. The separation efficiency was confirmed by the analysis of model solutions

Sign in / Sign up

Export Citation Format

Share Document