Study of potential oscillations during reaction of an aluminium single crystal with an aqueous KOH solution

1990 ◽  
Vol 55 (2) ◽  
pp. 345-353 ◽  
Author(s):  
Ivan Halaša ◽  
Milica Miadoková
Keyword(s):  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Periodic Potential ◽  
Optimum Conditions ◽  
Potential Oscillations ◽  
Dilute Aqueous Solutions ◽  
Experimental Findings ◽  
Kinetics Of

The authors investigated periodic potential changes measured on oriented sections of Al single crystals during spontaneous dissolution in dilute aqueous solutions of KOH, with the aim to find optimum conditions for the formation of potential oscillations. It was found that this phenomenon is related with the kinetics of the reaction investigated, whose rate also changed periodically. The mechanism of the oscillations is discussed in view of the experimental findings.

Adsorption of U(VI) from dilute aqueous solutions onto peat moss

2007 ◽  
Vol 95 (1) ◽  
Author(s):  
H. A. Omar ◽  
M. Aziz ◽  
K. Shakir
Keyword(s):  
Ionic Strength ◽  
Aqueous Solutions ◽  
Uranium Concentration ◽  
Probable Mechanism ◽  
Peat Moss ◽  
Optimum Conditions ◽  
Low Concentrations ◽  
Equilibrium Data ◽  
Dilute Aqueous Solutions

The adsorption of U(VI) onto peat moss has been studied as a function of uranium concentration, pH, shaking time and ionic strength. The pH and ionic strength of the solution markedly affect the extent of removal. The attainment of equilibrium is fast and the equilibrium data fit well the Freundlich, Langmuir and Dubinin-Radushkevich equations. A probable mechanism of uptake is discussed. Further studies demonstrate that under optimum conditions peat moss can be used for the treatment of waste solutions containing low concentrations of uranium.

Multistage Decomposition Kinetics of Ozone In Dilute Aqueous Solutions

1987 ◽  
Vol 9 (2) ◽  
pp. 165-177 ◽  
Author(s):  
Eddie P. Minchew ◽  
Joseph P. Gould ◽  
F. Michael Saunders
Keyword(s):  
Aqueous Solutions ◽  
Decomposition Kinetics ◽  
Dilute Aqueous Solutions ◽  
Kinetics Of

Syntheses, single-crystal structure determination, and Raman spectra of Rb[C(CN)3] and Cs[C(CN)3]

2015 ◽  
Vol 70 (2) ◽  
pp. 151-154 ◽  
Author(s):  
Olaf Reckeweg ◽  
Armin Schulz ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Aqueous Solutions ◽  
Single Crystal ◽  
Single Crystals ◽  
Raman Spectra ◽  
Structure Determination ◽  
Crystal Structure Determination ◽  
Space Group ◽  
Cell Parameters ◽  
Ethanol Yields

AbstractExtracting residues of an aqueous solutions containing equimolar amounts of K[C(CN)3] and RbF or CsF, respectively, with absolute ethanol, yields triangular, transparent colorless crystals of Rb[C(CN)3] and Cs[C(CN)3] after the ethanol was allowed to evaporate. The compounds are isotypic and crystallize isopointal to calcite in space group R3̅c (no. 167) with the cell parameters a=809.9(1) and c=1461.3(3) pm and a=843.29(9) and c=1459.9(2) pm, respectively. Single crystals were used to record the Raman spectra of the title compounds.

Kinetics of ion flotation of Co(II)–EDTA complexes from aqueous solutions

2015 ◽  
Vol 103 (9) ◽  
Author(s):  
Mohamed A. Soliman ◽  
Ghada M. Rashad ◽  
Mamdoh R. Mahmoud
Keyword(s):  
Aqueous Solutions ◽  
Cetylpyridinium Chloride ◽  
Optimum Conditions ◽  
Flotation Kinetics ◽  
Flow Rates ◽  
Flotation Rate ◽  
Ion Flotation ◽  
Ph Values ◽  
Edta Complexes ◽  
Kinetics Of

AbstractThe flotation kinetics of Co(II)-EDTA complexes from aqueous solutions using cetylpyridinium chloride (CPyCl) is studied and discussed in the present work. The effects of many variables on the ultimate recovery and the flotation rate are investigated. The data obtained from solutions of different pH values showed that Co(II)-EDTA complexes are successfully floated at pH 7.8. While at pH 3.4 and 11.2, both the ultimate recovery and the flotation rate are dependent on the concentration of CPyCl. Flotation of Co(II)-EDTA at different air flow rates, CPyCl concentrations and ionic strength showed that the ultimate recovery and the flotation rate are markedly affected. The other parameters (cobalt, EDTA and ethanol concentrations) had no effect on the ultimate recovery, while significantly affected the flotation rate. At the optimum conditions (Co(II) : EDTA = 1:1; CPyCl : Co(II) = 4:1; pH7.8;

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