Mechanisms and Rates of U(VI) Reduction by Fe(II) in Homogeneous Aqueous Solution and the Role of U(V) Disproportionation

2017 ◽  
Vol 121 (35) ◽  
pp. 6603-6613 ◽  
Author(s):  
Richard N. Collins ◽  
Kevin M. Rosso
Keyword(s):  
Aqueous Solution

Directing the Growth of Semiconductor Nanocrystals in Aqueous Solution: Role of Electrostatics

ChemPhysChem ◽  
2008 ◽  
Vol 9 (9) ◽  
pp. 1309-1316 ◽  
Author(s):  
Hao Zhang ◽  
Yi Liu ◽  
Chunlei Wang ◽  
Junhu Zhang ◽  
Haizhu Sun ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Semiconductor Nanocrystals

scholarly journals Electrochemiluminescence Study of Europium (III) Complex with Coumarin3-Carboxylic Acid

2008 ◽  
Vol 2008 ◽  
pp. 1-6 ◽  
Author(s):  
Stefan Lis ◽  
Krzysztof Staninski ◽  
Tomasz Grzyb
Keyword(s):  
Aqueous Solution ◽  
Spectral Analysis ◽  
Energy Transfer ◽  
Solid State ◽  
Carboxylic Acid ◽  
Elemental Analysis ◽  
Aluminium Electrode ◽  
The Eu

The europium (III) complex of coumarin-3-carboxylic acid (C3CA) has been prepared and characterized on the basis of elemental analysis, IR, and emission (photoluminescence and electrochemiluminescence) spectroscopy. The synthesised complex having a formula Eu was photophysically characterized in solution and in the solid state. Electrochemiluminescence, ECL, of the system containing the Eu(III)/C3CA complex was studied using an oxide-covered aluminium electrode. The goal of these studies was to show the possibility of the use of electrochemical excitation of the Eu(III) ion in aqueous solution for emission generation. The generated ECL emission was very weak, and therefore its measurements and spectral analysis were carried out with the use of cut-off filters method. The studies proved a predominate role of the ligand-to-metal energy transfer (LMET) in the generated ECL.

CO2 Capture in Amine-Based Aqueous Solution: Role of the Gas-Solution Interface

2011 ◽  
Vol 50 (43) ◽  
pp. 10178-10181 ◽  
Author(s):  
Tanza Lewis ◽  
Manfred Faubel ◽  
Bernd Winter ◽  
John C. Hemminger
Keyword(s):  
Aqueous Solution ◽  
Co2 Capture ◽  
Solution Interface

scholarly journals Oxidation of sulfur (IV) by oxygen in aqueous solution: role of some metal ions

1999 ◽  
Vol 10 (6) ◽  
Author(s):  
Claudia R. Martins ◽  
Clodovil A Cabral Neto ◽  
Janete J.F. Alves ◽  
Jailson B. de Andrade
Keyword(s):  
Aqueous Solution ◽  
Metal Ions

CO2 Capture in Amine-Based Aqueous Solution: Role of the Gas-Solution Interface

2011 ◽  
Vol 123 (43) ◽  
pp. 10360-10363 ◽  
Author(s):  
Tanza Lewis ◽  
Manfred Faubel ◽  
Bernd Winter ◽  
John C. Hemminger
Keyword(s):  
Aqueous Solution ◽  
Co2 Capture ◽  
Solution Interface

scholarly journals The Role of Carboxyl and Hydroxyl Groups of Humic Acid in Removing AuCl4- from Aqueous Solution

2017 ◽  
Vol 17 (1) ◽  
pp. 95 ◽  
Author(s):  
Sri Sudiono ◽  
Mustika Yuniarti ◽  
Dwi Siswanta ◽  
Eko Sri Kunarti ◽  
Triyono Triyono ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Humic Acid ◽  
Peat Soil ◽  
Sharp Decrease ◽  
Hydroxyl Groups ◽  
Mixed Solution ◽  
Oh Groups ◽  
Characterization Result ◽  
Ft Ir

Humic acid (HA) extracted from peat soil according to the recommended procedure of the International Humic Substances Society (IHSS) has been tested to remove AuCl4- from aqueous solution. The removal was optimum at pH 2.0 and it was mainly dictated by attachment through hydrogen bonding to unionized carboxyl (–COOH) groups and reduction by the action of the hydroxyl (–OH) groups to gold (Au) metal. The removal of AuCl4- improved after HA was purified through repeated immersion and shaking in a mixed solution containing 0.1 M HCl and 0.3 M HF. When the purification led to the sharp decrease in ash content from 39.34 to 0.85% (w/w) and significant increase in both the –COOH and –OH contents from 3240 to 3487 mmol/kg and from 4260 to 4620 mmol/kg, respectively; the removal of AuCl4- improved from 0.105 to 0.133 mmol/g. This improvement of AuCl4- removal by the purified HA was accompanied by higher ability in reduction to Au metal. The attached AuCl4- on –COOH groups of both crude and purified HAs was qualitatively observed by the characterization result of FT-IR spectroscopy, while the presence of Au metal on the surface of those HAs was verified by the characterization result of XRD.

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