Single-cycle method for partitioning of trivalent actinides using completely incinerable reagents from nitric acid medium

2014 ◽  
Vol 102 (7) ◽  
Author(s):  
Jammu Ravi ◽  
K. A. Venkatesan ◽  
M. P. Antony ◽  
T. G. Srinivasan ◽  
P. R. Vasudeva Rao
Keyword(s):  
Nitric Acid ◽  
Acid Medium ◽  
Minor Actinides ◽  
Nitric Acid Medium ◽  
Single Cycle ◽  
New Approach ◽  
Extraction Behavior ◽  
Trivalent Actinides

AbstractA new approach, namely “Single-cycle method for partitioning of Minor Actinides using completely incinerable ReagenTs” (SMART), has been explored for the separation of Am(III) from Eu(III) present in nitric acid medium. The extraction behavior of Am(III) and Eu(III) in a solution of an unsymmetrical diglycolamide,

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 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

Effect of pKa on the extraction behavior of Am(III) in organo phosphorus acid and diglycolamide solvent system

2018 ◽  
Vol 106 (2) ◽  
pp. 107-118 ◽  
Author(s):  
K. Rama Swami ◽  
R. Kumaresan ◽  
P. K. Nayak ◽  
K. A. Venkatesan ◽  
M. P. Antony
Keyword(s):  
Nitric Acid ◽  
Metal Ions ◽  
Phosphinic Acid ◽  
Liquid Waste ◽  
High Level Liquid Waste ◽  
Single Cycle ◽  
Cyanex 272 ◽  
Extraction Behavior ◽  
Trivalent Actinides ◽  
High Level

AbstractA combination of neutral and acidic extractant has been proposed for the single-cycle separation of trivalent actinides from high-level liquid waste (HLLW). The nature of acidic extractant in the combined solvent formulation plays a profound role in deciding the extraction and stripping of trivalent actinides. Therefore, the extraction behavior of Am(III) in a solution of tetra-bis(2-ethylhexyl)-diglycolamide (TEHDGA) and acidic extractant (HA) was studied from nitric acid medium. The acidic extractants chosen were bis(2-ethylhexyl)phosphoric acid (HDEHP), bis(2-ethylhexyl)phosphonic acid (PC88A) and bis(2,4,4-trimethylpentyl)phosphinic acid (CYANEX-272) whose pKavalues were 3.24, 4.51 and 6.37, respectively. The distribution ratio of Am(III) was measured as a function of various parameters such as concentration of nitric acid, TEHDGA, HA etc. The data were compared with those obtained in individual solvent systems namely 0.1 M TEHDGA/n-DD and HA/n-DD. Slope analysis of the extraction data indicated the synergic participation of both TEHDGA and HDEHP in the extraction of Am(III) at all acidities. However, antagonistic effect was observed at lower acidity when TEHDGA was mixed to PC88A or CYANEX-272 present inn-DD. Accordingly, a suitable mechanism has been proposed for the extraction of Am(III) at all acidities using these combined solvent formulation. Studies with fast reactor simulated high level liquid waste indicated that extraction of Am(III) was accompanied by co-extraction of lanthanides and unwanted metal ions such as Zr(IV), Mo(VI), Y(III) and Pd(II). However, addition of trans-1,2-diaminocyclohexane-N,N,N,N′-tetraaceticacid (CyDTA) reduced the extraction of unwanted metal ions. Batch extraction and stripping studies indicated the possibility of using 0.1 M TEHDGA+0.25 M HDEHP inn-dodecane for the single cycle separation of Am(III) from FR-SHLLW.

Extraction behavior of U(IV) from nitric acid medium using di-isodecyl phosphoric acid dissolved in dodecane

2010 ◽  
Vol 284 (1) ◽  
pp. 201-205 ◽  
Author(s):  
Sujoy Biswas ◽  
D. K. Singh ◽  
K. N. Hareendran ◽  
J. N. Sharma ◽  
S. B. Roy
Keyword(s):  
Nitric Acid ◽  
Phosphoric Acid ◽  
Acid Medium ◽  
Nitric Acid Medium ◽  
Extraction Behavior

Comparision in the solvent extraction behavior of uranium (VI) in some trialkyl phosphates in ionic liquid

2016 ◽  
Vol 104 (12) ◽  
Author(s):  
R. Rama ◽  
Alok Rout ◽  
K. A. Venkatesan ◽  
M. P. Antony ◽  
A. Suresh
Keyword(s):  
Ionic Liquid ◽  
Nitric Acid ◽  
Solvent Extraction ◽  
Acid Medium ◽  
Fast Reactor ◽  
Nitric Acid Medium ◽  
Extraction Behavior ◽  
Trialkyl Phosphates

AbstractHigher homologs of trialkyl phosphates (TAlP) are proposed for reprocessing of fast reactor fuels. Solvent extraction behavior of U(VI) from nitric acid medium was studied in some TAlP present in 1-octyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C

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