scholarly journals Development of inorganic ion exchangers for nuclear waste remediation. 1998 annual progress report

10.2172/13728 ◽  
1998 ◽  
Author(s):  
A. Clearfield ◽  
B.Z. Egan ◽  
A.I. Bortun ◽  
L.N. Bortun ◽  
S. Khainakov ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Progress Report ◽  
Ion Exchangers ◽  
Inorganic Ion Exchangers ◽  
Waste Remediation ◽  
Inorganic Ion ◽  
Annual Progress Report

Ceramization of Inorganic Ion Exchangers Loaded with Nuclear-Waste into Red Clay Tiles

1982 ◽  
Vol 15 ◽  
Author(s):  
Jukka Lehto ◽  
Olli J. Heinonen ◽  
Jorma K. Miettinen
Keyword(s):  
Nuclear Waste ◽  
Hot Pressing ◽  
Weight Ratio ◽  
Sodium Titanate ◽  
New Method ◽  
Ion Exchangers ◽  
Red Clay ◽  
Inorganic Ion Exchangers ◽  
Inorganic Ion ◽  
Clay Tiles

ABSTRACTA new method to ceramize inorganic ion exchangers loaded with nuclear waste has been developed. It is simpler and cheaper than methods used previously, e.g. hot pressing. The inorganic ion exchangers, sodium titanate and ZrO2, were turned into final ceramic waste form by mixing them with a Finnish red clay in weight ratio 1:4 at maximum. The tiles moulded frKm the wet, bakeable mixture were ceramized at 1020–1060°C. The leach rates of Sr, Cs and Co from the tiles determind by a 7 dynam c ISO-test were after six months of leaching 10−6−10−7 g/cm2/d, in decreasing order. Mechanically the tiles are very durable: flexural strengths were in the range of 20–45 meganewtons per square meter.

Instrumental neutron activation analysis of lanthanides and coexisting elements in monazite samples and group separation using synthesized inorganic ion exchangers

2020 ◽  
Vol 108 (11) ◽  
pp. 901-912
Author(s):  
Mohamed A. Ghamry ◽  
Fatma H. El-Sweify ◽  
Alaa El-Din A. Abdel-Fattah ◽  
Shorouk M. Aly ◽  
Mohamed F. El-Shahat
Keyword(s):  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Group Separation ◽  
Ion Exchangers ◽  
Inorganic Ion Exchangers ◽  
Inorganic Ion ◽  
Lanthanide Elements ◽  
Instrumental Neutron Activation

AbstractSamples of Egyptian monazite ore obtained from black sand of Abu-Khashaba, Rashied (Rosetta) area on the Mediterranean Sea coast were analyzed for some lanthanides and coexisting elements using instrumental neutron activation analysis (INAA). The analyses were carried out qualitatively and quantitatively for the elements Ce, Nd, Eu, Gd, Tb, Yb and Sc, La as well as the accompanying elements Co, Cr, Fe, Hf, Nb, Zn, Zr in addition to the actinides Th and U; whereas after relatively longer decay time the following lanthanide elements were analyzed: Ce, Nd, Eu, Gd, Tb, Yb and Sc, beside the accompanying elements Co, Cr, Fe, Hf, Nb, Zn, Zr and Th. Two certified reference materials (CRM) were used in this study. For sorption studies, radioactive isotopes 141Ce, 160Tb, 169Yb, 95Zr, 181Hf, and 95Nb were prepared by neutron irradiation to trace the adsorption behaviors of their corresponding elements under certain conditions. Furthermore, radiochemical separation of the analyzed elements in the irradiated monazite samples in sulfuric acid solutions was carried out. Ion exchange technique was applied under static and dynamic conditions and the employed inorganic ion exchangers were locally synthesized and characterized using FT-IR and scanning electron microscopy (SEM) tools. Good group separation of the analyzed lanthanide elements from the accompanying elements was achieved.

Inorganic ion exchangers—IX

1974 ◽  
Vol 36 (10) ◽  
pp. 2377-2383 ◽  
Author(s):  
Sten Ahrland ◽  
Nils-Olof Björk ◽  
Robert Blessing ◽  
Richard Herman
Keyword(s):  
Ion Exchangers ◽  
Inorganic Ion Exchangers ◽  
Inorganic Ion

Amine cobalt(II) hexacyanoferrate(II) compounds as inorganic ion exchangers

1968 ◽  
Vol 40 (7) ◽  
pp. 1135-1136 ◽  
Author(s):  
Richard B. Hahn ◽  
Henry C. Klein
Keyword(s):  
Ion Exchangers ◽  
Inorganic Ion Exchangers ◽  
Inorganic Ion
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