Thermal and spectral characterisation of compounds of the uranyl ion with surfactants

1988 ◽  
Vol 131 ◽  
pp. 79-90 ◽  
Author(s):  
R.A. Singh ◽  
A.V. Sapre ◽  
S.R. Dharwadkar ◽  
K.V.S.Rama Rao
Keyword(s):  
Uranyl Ion ◽  
Spectral Characterisation

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

Spectral characterisation and impact of stepwise ablation protocol including LAA electrical isolation on persistent AF

2020 ◽  
Author(s):  
Yuedong Ma ◽  
Junaid A.B. Zaman ◽  
Rui Shi ◽  
Nabeela Karim ◽  
Sandeep Panikker ◽  
...  
Keyword(s):  
Electrical Isolation ◽  
Spectral Characterisation

Modeling of sorption kinetics of U(VI) micro-quantities nanostructured materials with anatase mesoporous structures

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Veniamin Zheleznov ◽  
Aleksey Golikov ◽  
Tatiana Sokolnitskaya ◽  
Sergey Ivannikov
Keyword(s):  
Nanostructured Materials ◽  
Sorption Kinetics ◽  
Uranyl Ion ◽  
Competitive Sorption ◽  
Hydroxyl Groups ◽  
Complex Ions ◽  
The Stability ◽  
Kinetics Of ◽  
Mesoporous Structures ◽  
Ionic Forms

Abstract The sorption kinetics of uranyl ions micro-quantities from fluoride solutions by nanostructured materials with anatase mesoporous structures has been studied. Using the model of competitive sorption of ions and positively charged complexes of uranyl ion on deprotonated hydroxyl groups of an anatase, kinetic curves of changes in the ratio of ionic forms of uranium in solution were calculated. Modeling was carried out under the assumption of a two-stage mechanism of uranium complex ions sorption. The modeling considered the influence of the uranyl ion carbonate complexes formation. The shift in equilibrium among ionic forms of uranyl correlates with the stability of the complexes in solution.

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