On the chemiluminescence in the oxidation of tetravalent uranium to the uranyl ion by dimethyldioxirane

Luminescence ◽  
2002 ◽  
Vol 17 (5) ◽  
pp. 293-298 ◽  
Author(s):  
Dmitri V. Kazakov ◽  
Gulchekhrai Y. Maistrenko ◽  
Natal'ya P. Polyakova ◽  
Ramilya R. Latypova ◽  
Valeri P. Kazakov ◽  
...  
Keyword(s):  
Uranyl Ion ◽  
Tetravalent Uranium

STUDIES ON THE ELECTRO-OXIDATION OF TETRAVALENT URANIUM

1948 ◽  
Vol 26b (5) ◽  
pp. 441-455
Author(s):  
R. H. Betts
Keyword(s):  
Aqueous Solution ◽  
Uranyl Ion ◽  
Ion Concentration ◽  
Anode Potential ◽  
High Current ◽  
Tetravalent Uranium ◽  
Platinum Anode ◽  
Wide Range ◽  
Current Densities ◽  
Electro Oxidation

The conversion of uranous ion to uranyl ion at a platinum anode has been studied over a wide range of current densities and anode potentials. At high current densities, the rate of the oxidation is dependent on the uranous ion concentration and is independent of the particular current density used. At low current densities, the rate of the process increases exponentially with increases in the anode potential and temperature, but is independent of the uranyl ion concentration. It is concluded that at high current densities, the rate of oxidation is limited by the rate of diffusion of uranous ion to the anode, while at low current densities, the rate of the reaction is limited by the slowness in electron transfer between the metallic ion and the anode. A formal correlation is made between the irreversible characteristics of this system and those displayed during the electrodeposition of hydrogen and oxygen from aqueous solution.

In Situ Reduction from Uranyl Ion into a Tetravalent Uranium Trimer and Hexamer Featuring Ion-Exchange Properties and the Alexandrite Effect

2018 ◽  
Vol 57 (11) ◽  
pp. 6753-6761 ◽  
Author(s):  
Jian Lin ◽  
Zenghui Yue ◽  
Mark A. Silver ◽  
Meiying Qie ◽  
Xiaomei Wang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Uranyl Ion ◽  
In Situ Reduction ◽  
Tetravalent Uranium ◽  
Exchange Properties

The Preparation of p(acrylonitrile-co-acrylamide) hydrogels for uranyl ion recovery from aqueous environments

2014 ◽  
Vol 1 (42) ◽  
pp. 89-89 ◽  
Author(s):  
Duygu Alpaslan ◽  
Nahit Aktas ◽  
Selehattin Yilmaz ◽  
Nurettin Sahiner
Keyword(s):  
Uranyl Ion ◽  
Aqueous Environments

Preconcentration of Uranium(VI) on Modified and Unmodified Amberlite XAD 4 Sorbent

1993 ◽  
Vol 58 (8) ◽  
pp. 1813-1820 ◽  
Author(s):  
Jan Vácha ◽  
Lumír Sommer
Keyword(s):  
Spectrophotometric Determination ◽  
Uranyl Ion ◽  
Sodium Diethyldithiocarbamate ◽  
Uranyl Ions ◽  
Methanolic Solution

The sorption of uranyl ions on columns with the macrophorus hydrophobic sorbent Amberlite XAD 4 modified with 1-(2-pyridylazo)-2-naphthol and sodium diethyldithiocarbamate was examined. Following elution of the uranyl ion with HNO3 (2 - 4 mol l-1) or of the diethyldithiocarbamate UO22+-chelate with a methanolic solution of HCl (0.1 mol l-1), uranium was determined spectrophotometrically with 4-(2-pyridylazo)resorcinol or with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol. The preconcentration of uranium on Amberlite XAD 4 type sorbents is convenient for its spectrophotometric determination in waters.

Uranyl Complexes of Alkyl-Bridged Ditopic Diaminotetraphenol Ligands and Their Use as Uranyl Ion Extractors

2013 ◽  
Vol 52 (15) ◽  
pp. 8591-8600 ◽  
Author(s):  
Antti Riisiö ◽  
Ari Väisänen ◽  
Reijo Sillanpää
Keyword(s):  
Uranyl Ion ◽  
Uranyl Complexes

scholarly journals Recycling of Brewer’s Spent Grain as a Biosorbent by Nitro-Oxidation for Uranyl Ion Removal from Wastewater

ACS Omega ◽  
2021 ◽  
Author(s):  
Yi Su ◽  
Marco Wenzel ◽  
Silvia Paasch ◽  
Markus Seifert ◽  
Wendelin Böhm ◽  
...  
Keyword(s):  
Uranyl Ion ◽  
Brewer’S Spent Grain ◽  
Ion Removal ◽  
Spent Grain

scholarly journals Controlling the Reduction of Chelated Uranyl to Stable Tetravalent Uranium Coordination Complexes in Aqueous Solution

2020 ◽  
Author(s):  
Korey P. Carter ◽  
Kurt F. Smith ◽  
Toni Tratnjek ◽  
Gauthier J.-P. Deblonde ◽  
Liane M. Moreau ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Coordination Complexes ◽  
Tetravalent Uranium
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