Photochemical Valence Adjustment of Pu and Np in Nitric Acid Solution for Separation and Co-Extraction

1994 ◽  
Vol 353 ◽  
Author(s):  
Y. Wada ◽  
K. Morimoto ◽  
T. Goibuchi ◽  
H. Tomiyasu
Keyword(s):  
Nitric Acid ◽  
Acid Solution ◽  
Nitric Acid Solution ◽  
Redox Reaction ◽  
Process Technology

AbstractPhotochemical redox reaction tests were corried out where the experimental variables were irradiation rate using a Hg lamp light and molarity of nitric acid containing different reductant reagents such as hydroxylamine(HAN), hydrazine(HDZ) and urea. Based on these tests, we confirmed that the valences of Pu and Np were easily photochemically adjusted to two conditions of Pu(IV,VI)-Np(V) and Pu(IV,VI)-Np(VI), indicating that photochemical valence adjustment for the separation and co-extraction of Pu and Np has excellent potential as an advanced process technology.

scholarly journals Novel pyrimidine-bichalcophene derivatives as corrosion inhibitors for copper in 1 M nitric acid solution

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25314-25333
Author(s):  
Mai A. Khaled ◽  
Mohamed A. Ismail ◽  
Ahmed. A. El-Hossiany ◽  
Abd El-Aziz S. Fouda
Keyword(s):  
Weight Loss ◽  
Electrochemical Impedance Spectroscopy ◽  
Nitric Acid ◽  
Impedance Spectroscopy ◽  
Acid Solution ◽  
Nitric Acid Solution ◽  
Potentiodynamic Polarization ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Pyrimidine Derivatives

This study targets the investigation of three pyrimidine derivatives (MA-1230, MA-1231, MA-1232) for the prevention of corrosion on copper in 1 M HNO3via weight loss (WL), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) techniques.

scholarly journals The effect of crystal textures on the anodic oxidization of zirconium in a boiling nitric acid solution

2015 ◽  
Vol 53 (9) ◽  
pp. 1371-1379 ◽  
Author(s):  
Chiaki Kato ◽  
Yasuhiro Ishijima ◽  
Fumiyoshi Ueno ◽  
Masahiro Yamamoto
Keyword(s):  
Nitric Acid ◽  
Acid Solution ◽  
Nitric Acid Solution

Influence of Corona Discharge on CaSO4 Solubility of Silicone Rubber Insulator Surface

2021 ◽  
Vol 69 (1) ◽  
pp. 74-79
Author(s):  
Sihua Wang ◽  
Junjun Wang ◽  
Chen Long ◽  
Zhao Lei
Keyword(s):  
Nitric Acid ◽  
Acid Solution ◽  
Corona Discharge ◽  
Nitric Acid Solution ◽  
Silicone Rubber ◽  
Calcium Sulfate ◽  
Salt Composition ◽  
Surface Product ◽  
Two Temperatures ◽  
Discharge Test

Some studies have shown that the operating state of silicone rubber insulators is not only affected by surface corona discharge, but also different due to the surface covered with different pollutants, but few studies have linked the two. In this paper, by designing the corona discharge test of silicone rubber insulator, the output of nitric acid from its surface product was calculated, and the concentration of nitric acid under different air humidity was obtained. The solubility test of slightly dissolved salt calcium sulfate in nitric acid solution at 293.15K and 333.15K was designed to obtain the solubility of calcium sulfate at different concentrations of nitric acid at two temperatures. Finally, a quantitative analysis of the solubility of calcium sulfate on the surface of insulator FXBW-10/70 in nitric acid solution shows that the surface contamination of insulator with good hydrophobicity may be completely dissolved by nitric acid solution, but the surface of insulator with loss of hydrophobicity cannot be completely dissolved by nitric acid. This study provides a theoretical basis for the dissolution characteristics of silicon rubber insulator corona discharge on its surface soluble salt composition and provides a new idea for the influence of insulator corona discharge on its electrical properties.

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