Correlation Functions for the Distribution Coefficients of U(IV) and Pu(III) Ions between Aqueous Nitric Acid and 30% TBP in an Aliphatic Diluent

1985 ◽  
Vol 70 (3) ◽  
pp. 394-400 ◽  
Author(s):  
John F. Geldard ◽  
Leigh Phillips ◽  
Adolph L. Beyerlein
Keyword(s):  
Nitric Acid ◽  
Correlation Functions ◽  
Distribution Coefficients ◽  
Aqueous Nitric Acid

THE EXTRACTION OF THORIUM AND SOME LOWER LANTHANIDE NITRATES BY DIBUTYL BUTYL PHOSPHONATE

1962 ◽  
Vol 40 (8) ◽  
pp. 1684-1689 ◽  
Author(s):  
P. G. Manning
Keyword(s):  
Nitric Acid ◽  
National Laboratory ◽  
Nitric Acid Concentration ◽  
Distribution Coefficients ◽  
Metal Species ◽  
Trace Metal Concentration ◽  
Oak Ridge ◽  
Separation Factors ◽  
Lanthanide Nitrates ◽  
Aqueous Nitric Acid

The distribution of thorium and a number of lanthanides between nitric acid and solutions of dibutyl butyl phosphonate in odorless kerosene has been examined as a function of the aqueous nitric acid concentration. Experiments were conducted at trace metal concentration using radioisotopes. Separation factors (denoted by S and defined as the ratio of the distribution coefficients, K, for two metal species) have been measured for some lanthanide–lanthanide couples and also for some thorium–lanthanide couples. Results indicate that separation factors between successive lanthanides (given by S = KZ+1/KZ) at the lower end of the rare-earth series are superior to those obtained with either tributyl phosphate (TBP) (D. Scargill et al. J. Inorg. & Nuclear Chem. 4, 304 (1957)) or trioctyl phosphine oxide (TOPO) (J. M. Schmitt. Oak Ridge National Laboratory. Unpublished data), but as Z increases, SDBBP ~STBP > STOPO. For thorium–lanthanide couples, S′DBBP > S′TBP. Measurements over a range of extractant concentrations indicate that the lanthanides are extracted as trisolvates.

Electrochemical behaviour of galena (PbS) in aqueous nitric acid and perchloric acid solutions

2004 ◽  
Vol 34 (1) ◽  
pp. 37-46 ◽  
Author(s):  
Yu. Mikhlin ◽  
A. Kuklinskiy ◽  
E. Mikhlina ◽  
V. Kargin ◽  
I. Asanov
Keyword(s):  
Nitric Acid ◽  
Perchloric Acid ◽  
Electrochemical Behaviour ◽  
Acid Solutions ◽  
Aqueous Nitric Acid

scholarly journals Direct Observation of Ion Pairing in Aqueous Nitric Acid Using 2D Infrared Spectroscopy

2018 ◽  
Vol 123 (1) ◽  
pp. 225-238 ◽  
Author(s):  
Nicholas H. C. Lewis ◽  
Joseph A. Fournier ◽  
William B. Carpenter ◽  
Andrei Tokmakoff
Keyword(s):  
Infrared Spectroscopy ◽  
Nitric Acid ◽  
Direct Observation ◽  
Ion Pairing ◽  
Aqueous Nitric Acid
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