Separation of strontium from nuclear waste solutions by solvent extraction with crown ethers

1985 ◽  
Vol 89 (2) ◽  
pp. 389-398 ◽  
Author(s):  
E. Blasius ◽  
W. Klein ◽  
U. Schön
Keyword(s):  
Solvent Extraction ◽  
Crown Ethers ◽  
Nuclear Waste

Coated Magnetic Nanoparticles for Acidic Nuclear Waste Separation

2010 ◽  
Vol 1265 ◽  
Author(s):  
Maninder Kaur ◽  
Hongmei Han ◽  
Andrew Johnson ◽  
Jesof Kaczor ◽  
Andrzej Paszczynski ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Solvent Extraction ◽  
Ion Exchange ◽  
Nuclear Waste ◽  
Cost Effective ◽  
Silica Coating ◽  
Coating Process ◽  
Acidic Conditions ◽  
Allylamine Hydrochloride ◽  
Waste Separation

AbstractActinide specific chelator (che) conjugated with magnetic nanoparticles (MNPs) have been developed to separate nuclear waste in acidic conditions. Compared to the traditional nuclear waste treatments, such as solvent extraction and ion exchange, this method is a simple, compact and cost-effective process that generates minimum secondary waste. In this paper, we focus on the coating process of MNPs to achieve a combination of good acidic resistance, high chelator loading density and efficient magnetic separation. An optimized silica coating process before conjugates chelator directly onto MNPs significantly improves the acidic resistance of the MNP-che complex. Chelator loading density is significantly increased by attaching a linear polyamine polymer poly(allylamine hydrochloride) (PAH) to the surface of the MNPs using chemical and physical approaches.

Preparation of a Uranium Conversion Plant’s Nuclear Waste for Final Disposal by Means of Magnetically Assisted Chemical Separation

2013 ◽  
Vol 3 (1) ◽  
pp. 8-18
Author(s):  
Ahad Ghaemi ◽  
Mehdi Maghsudi ◽  
Fatemeh Hanifpour ◽  
Mohammad Samadfam
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
Nuclear Waste ◽  
Chemical Separation ◽  
Extraction Process ◽  
Uranium Content ◽  
Extraction Yield ◽  
Solvent Extraction Plant ◽  
Ft Ir ◽  
Co Precipitation

Uranium is separated from the raffinate of Isfahan’s uranium conversion solvent extraction process by means of solvent coated magnetic nanoparticles. These particles were synthesized via chemical co-precipitation and were analyzed by XRD, TEM and TGA methods. The particles’ surface were modified with D2EHPA and analyzed with FT-IR method. The results revealed that 0.5 M nitric acid and 25% w/w D2EHPA on nanoparticles gives the maximum uranium extraction yield. The raffinate of the solvent extraction plant can be disposed safely after its uranium content reduces to the allowable values.

Solvent Extraction of Amino Acids With Crown Ethers and Cryptand 222

1995 ◽  
Vol 28 (5) ◽  
pp. 835-843 ◽  
Author(s):  
Lucia Mutihac ◽  
Daniela Oana Popescu ◽  
Raluca-Ioana Stefan
Keyword(s):  
Amino Acids ◽  
Solvent Extraction ◽  
Crown Ethers ◽  
Cryptand 222
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