Extraction Behavior of Ln(III) Ions by T2EHDGA/n-Dodecane from Nitric Acid and Sodium Nitrate Solutions

2018 ◽  
Vol 36 (4) ◽  
pp. 331-346 ◽  
Author(s):  
Emily Campbell ◽  
Vanessa E. Holfeltz ◽  
Gabriel B. Hall ◽  
Kenneth L. Nash ◽  
Gregg J. Lumetta ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Sodium Nitrate ◽  
Extraction Behavior ◽  
Nitrate Solutions

Quantification of Transferring and Adhering for Pd, Mo, Te, Sb, Ru, Re, Cs and I During the Evaporation Under Vacuum and at Atmospheric Pressure

2003 ◽  
Author(s):  
K. Ito ◽  
T. Takata ◽  
M. Kamiya
Keyword(s):  
Nitric Acid ◽  
Nuclear Waste ◽  
Sodium Nitrate ◽  
Atmospheric Pressure ◽  
Liquid Waste ◽  
Waste Recycling ◽  
Nuclear Fuel Reprocessing ◽  
Recycling Of Wastes ◽  
Fuel Reprocessing ◽  
Nitrate Solutions

In order to modify current nuclear fuel reprocessing plants on the basis of a more sophisticated, economical, and safer nuclear waste recycling system, the production of low-level radioactive wastes must be reduced and the recycling of wastes must become more efficient. To simulate liquid waste recycling operations, evaporators under vacuum and at atmospheric pressure were used to determine adhering and transferring rates for Pd, Mo, Te, Sb, Ru, Re, Cs and I in the nitric acid and sodium nitrate solutions. In the evaporation from the HNO3 and NaNO3 solutions containing precipitate PdI2, the percentage values for materials adhering on the inside of lid at vacuum pressure were 0.01 ∼ 0.1%/m2, however at atmospheric pressure the values were 0.001 ∼ 0.01%/m2. Adhering percentage values on the condenser were 0.0001 ∼ 0.001%/m2 for the vacuum and atmospheric pressure systems. The transferred percentages into the distillate for Pd, Mo, Te, Sb, Ru, Re, and Cs were 0.0001 ∼ 0.001% in the HNO3 and NaNO3 solutions for the vacuum and atmospheric pressure systems, and those of I were about 10% for HNO3 system at atmospheric pressure, 2∼7% for HNO3 system under vacuum, 0.01∼0.1% for NaNO3 system under vacuum. Reducing rates for the treated solution were one third of feeding solutions in the evaporation under vacuum and at atmospheric pressure.

A new 2-oxy-N,N-dioctylacetamide grafted resin for the separation of trivalent actinides from nitric acid medium

2015 ◽  
Vol 103 (2) ◽  
Author(s):  
B. Robert Selvan ◽  
T. Prathibha ◽  
K. A. Venkatesan ◽  
M. P. Antony ◽  
P. R. Vasudeva Rao
Keyword(s):  
Nitric Acid ◽  
Ir Spectroscopy ◽  
Acid Medium ◽  
Elemental Analysis ◽  
Sodium Nitrate ◽  
Nitric Acid Medium ◽  
Extraction Behavior ◽  
Trivalent Actinides ◽  
Merrifield Resin ◽  
First Time

AbstractA novel 2-oxy-N,N-dioctylacetamide anchored on Merrifield resin was synthesized and characterized by elemental analysis, TG-DTA and IR spectroscopy, for the first time. The extraction behavior of Am(III) and Eu(III) from nitric acid medium in the dioctylacetamide anchored resin (R-DOA) was studied as a function of various parameters such as duration of equilibration, concentration of nitric acid and sodium nitrate etc. The distribution coefficient (

Extraction of Am(III) by benzyldibutylamine from nitrate solutions of lanthanides

1981 ◽  
Vol 46 (1) ◽  
pp. 194-200 ◽  
Author(s):  
Marta Vojtíšková ◽  
Věra Jedináková ◽  
Libor Kuča
Keyword(s):  
Nitric Acid ◽  
Nuclear Fuel ◽  
Organic Phase ◽  
Spent Nuclear Fuel ◽  
Optimum Conditions ◽  
Separation Factors ◽  
Nitrate Solutions

Benzyldibutylamine is a suitable extractant for the separation of Am(III) and Ln(III) from the acidic nitrate solutions. The effect of lanthanides and yttrium on the extraction of Am(III) has been followed under the conditions modelling the content of these components in the spent nuclear fuel. The separation factors αAm/Ln were evaluated for the optimum conditions found for the separation of Am(III) from the lanthanides. The coextraction of nitric acid and water into the organic phase is discussed.

Extraction behavior of strontium from nitric acid medium with N,N’-dimethyl-N,N’-dioctyldiglcolamide

2017 ◽  
Vol 35 (7) ◽  
pp. 507-518 ◽  
Author(s):  
Yingbo Xu ◽  
Yang Gao ◽  
Yu Zhou ◽  
Chenchen Fan ◽  
Hongguo Hou ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Acid Medium ◽  
Nitric Acid Medium ◽  
Extraction Behavior

Effects of temperature on the extraction of U(VI) and Pu(IV) by tris(2-methylbutyl) phosphate from nitric acid media

2018 ◽  
Vol 106 (4) ◽  
pp. 281-289 ◽  
Author(s):  
A. Suresh ◽  
S. Jayalakshmi ◽  
Subramee Sarkar ◽  
N. Sivaraman
Keyword(s):  
Nitric Acid ◽  
Temperature Effects ◽  
Nitric Acid Concentration ◽  
Second Law ◽  
Extractant Concentration ◽  
Acid Media ◽  
Extraction Behavior ◽  
Ratio Data ◽  
Effects Of Temperature ◽  
Equilibrium Aqueous Phase

AbstractExtraction behavior of tris(2-methylbutyl) phosphate (T2MBP), a higher homologue of tri-n-butyl phosphate (TBP), in the extraction of U(VI) and Pu(IV) from nitric acid media has been evaluated in the present study. Distribution ratios for the extraction of these metal ions by T2MBP were measured as a function of equilibrium aqueous phase nitric acid concentration, extractant concentration and temperature to understand the temperature effects on extraction. Enthalpies of extraction of T2MBP/n-dodecane-U(VI)-HNO3and T2MBP/n-dodecane-Pu(IV)-HNO3systems were calculated from the distribution ratio data using “second law” method. The data reveal that the extraction of U(VI) by T2MBP is exothermic in nature, whereas that of Pu(IV) is endothermic.

Kinetic analysis of sodium nitrate(III) inversion with nitric acid(V)

2003 ◽  
Vol 95 (1-3) ◽  
pp. 95-99
Author(s):  
Jerzy Piotrowski ◽  
Krzysztof Piotrowski
Keyword(s):  
Nitric Acid ◽  
Kinetic Analysis ◽  
Sodium Nitrate
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