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

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.

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

Inorganic Chemistry ◽

10.1021/acs.inorgchem.8b01098 ◽

2018 ◽

Vol 57 (11) ◽

pp. 6753-6761 ◽

Cited By ~ 8

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

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

Hacettepe Journal of Biology and Chemistry ◽

10.15671/hjbc.20144210823 ◽

2014 ◽

Vol 1 (42) ◽

pp. 89-89 ◽

Cited By ~ 4

Author(s):

Duygu Alpaslan ◽

Nahit Aktas ◽

Selehattin Yilmaz ◽

Nurettin Sahiner

Keyword(s):

Uranyl Ion ◽

Aqueous Environments

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Behaviour of uranyl ion upon reduction from the ethylenedisulphurdiacetic acid solution at the dropping mercury electrode

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19710935 ◽

1971 ◽

Vol 36 (2) ◽

pp. 935-939

Author(s):

D. Ž. Sužnjević ◽

M. V. Šušić

Keyword(s):

Acid Solution ◽

Mercury Electrode ◽

Uranyl Ion ◽

Dropping Mercury Electrode

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

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19931813 ◽

1993 ◽

Vol 58 (8) ◽

pp. 1813-1820 ◽

Cited By ~ 5

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.

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