Phase Composition, Structure, and Hydrolytic Stability of Sodium-Aluminum(Iron) Phosphate Glass Containing Rare-Earth Oxides

2018 ◽  
Vol 75 (3-4) ◽  
pp. 89-94
Author(s):  
S. V. Stefanovskii ◽  
O. I. Stefanovskaya ◽  
D. V. Semenova ◽  
M. I. Kadyko ◽  
S. S. Danilov
Keyword(s):  
Rare Earth ◽  
Phase Composition ◽  
Phosphate Glass ◽  
Hydrolytic Stability ◽  
Iron Phosphate ◽  
Rare Earth Oxides ◽  
Aluminum Iron ◽  
Composition Structure

Removal of Fission Products in the Spent Electrolyte Using Iron Phosphate Glass as a Sorbent

2010 ◽  
Author(s):  
Ippei Amamoto ◽  
Naoki Mitamura ◽  
Tatsuya Tsuzuki ◽  
Yasushi Takasaki ◽  
Atsushi Shibayama ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Phosphate Glass ◽  
Alkali Metals ◽  
Fission Products ◽  
Iron Phosphate ◽  
Experimental Result ◽  
Filtration Method ◽  
High Level ◽  
Filtration Experiment

This study is carried out to make the pyroprocessing hold a competitive advantage from the viewpoint of environmental load reduction and economical improvement. As one of the measures to reduce the volume of the high-level radioactive waste (HLW), the phosphate conversion method is applied for removal of fission products (FP) from the melt, referring to the spent electrolyte in this paper. Among the removing target chlorides in the spent electrolyte i.e., alkali metals, alkaline earth metals and rare earth elements, only the rare earth elements and lithium form the precipitates as insoluble phosphates by reaction with Li3PO4. The sand filtration method was applied to separate FP precipitates from the spent electrolyte. The iron phosphate glass (IPG) powder, which is a compatible material for the immobilization of FP, was used as a filter medium. After filtration experiment, it was proven that insoluble FP could almost be completely removed from the spent electrolyte. Subsequently, we attempted to separate the dissolved FP from the spent electrolyte. The IPG was being used once again but this time as a sorbent instead. This is possible because the IPG has some unique characteristics, e.g., changing the valence of iron, which is one of its network modifiers due to its manufacturing temperature. Therefore, it would be likely to sorb some FP when the chemical condition of IPG is unstable. We produced three kinds of IPG under different manufacturing temperature and confirmed that those glasses could sorb FP as anticipated. According to the experimental result, its sorption efficiency of metal cations was attained at around 20–40%.

Phase composition, structure, and hydrolytic durability of phosphate glass materials for immobilizing liquid highly level waste rich in-iron-group elements

2015 ◽  
Vol 41 (5) ◽  
pp. 489-499 ◽  
Author(s):  
S. V. Stefanovskya ◽  
M. B. Remizov ◽  
E. A. Belanova ◽  
P. V. Kozlov ◽  
R. A. Makarovsky ◽  
...  
Keyword(s):  
Phase Composition ◽  
Phosphate Glass ◽  
Iron Group ◽  
Composition Structure ◽  
Hydrolytic Durability

Physical and structural properties of calcium iron phosphate glass doped with rare earth

2014 ◽  
Vol 402 ◽  
pp. 135-140 ◽  
Author(s):  
Xiaofeng Liang ◽  
Haijian Li ◽  
Cuiling Wang ◽  
Huijun Yu ◽  
Zhen Li ◽  
...  
Keyword(s):  
Rare Earth ◽  
Structural Properties ◽  
Phosphate Glass ◽  
Iron Phosphate ◽  
Calcium Iron

Immobilization of Rhenium as a Technetium Surrogate in Aluminum Iron Phosphate Glass

2021 ◽  
Vol 63 (1) ◽  
pp. 99-106
Author(s):  
S. S. Danilov ◽  
A. V. Frolova ◽  
S. A. Kulikova ◽  
S. E. Vinokurov ◽  
K. I. Maslakov ◽  
...  
Keyword(s):  
Phosphate Glass ◽  
Iron Phosphate ◽  
Aluminum Iron

Oxidation state and coordination of iron in sodium–aluminum–iron phosphate glasses and their hydrolytic stability

2015 ◽  
Vol 463 (1) ◽  
pp. 145-149 ◽  
Author(s):  
Ya. S. Glazkova ◽  
S. N. Kalmykov ◽  
I. A. Presniakov ◽  
A. V. Sobolev ◽  
O. I. Stefanovskaya ◽  
...  
Keyword(s):  
Oxidation State ◽  
Hydrolytic Stability ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Aluminum Iron ◽  
Iron Phosphate Glasses

Simulation of radioactive decay by barium substitution for cesium in sodium aluminum-iron phosphate glass

2018 ◽  
Vol 319 (3) ◽  
pp. 817-826
Author(s):  
S. V. Stefanovsky ◽  
O. I. Stefanovsky ◽  
I. L. Prusakov ◽  
M. I. Kadyko ◽  
B. S. Nikonov ◽  
...  
Keyword(s):  
Phosphate Glass ◽  
Radioactive Decay ◽  
Iron Phosphate ◽  
Aluminum Iron
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