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  • 1995-1999  (4)
  • 1
    Electronic Resource
    Electronic Resource
    In situ degradation of formaldehyde with electrogenerated hypochlorite ion (1995)
    Springer
    Journal of applied electrochemistry 25 (1995), S. 483-489 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The oxidant ClO− was generated on an SPR (SnO2-PdO-RuO2-TiO2) anode and used to degrade formaldehyde in aqueous solution. The current efficiency of the production of hypochlorite ion was significantly affected by the concentration of chloride ion, pH and stirring rate. The effect of current density and temperature on the current efficiency for electrogeneration of hypochlorite ion was slight. The maximum anodic current efficiency was 99.3% when 100 C was charged. Increasing the concentration of chloride ion, pH, temperature, stirring rate and the concentration of formaldehyde in the solution and decreasing the current density and charge passed resulted in increased current efficiency of degradation of formaldehye with electrogenerated hypochlorite ion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260692
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  • 2
    Electronic Resource
    Electronic Resource
    In situ paired electrooxidative degradation of formaldehyde with electrogenerated hydrogen peroxide and hypochlorite ion (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 703-710 
    Details
    ISSN: 1572-8838
    Keywords: paired electrolysis ; oxidative degradation ; formaldehyde ; hydrogen peroxide ; hypochlorite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Formaldehyde was degraded with hydrogen peroxide and hypochlorite ion electrogenerated by paired electrolysis of dissolved oxygen and chloride ion in aqueous solution. Degradation of formaldehyde in the cathodic compartment was significantly affected by the ratio of electrolyte volume to cathodic surface area, oxygen sparging rate and stirring rate. The model calculations correlated sufficiently well with the experimental results. The average current efficiency and degradation fraction of the in situ paired electrooxidative degradation of formaldehyde were experimentally found to be 62.0% and 93.2%, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003294011228
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  • 3
    Electronic Resource
    Electronic Resource
    Paired electrooxidative degradation of phenol with in situ electrogenerated hydrogen peroxide and hypochlorite (1996)
    Springer
    Journal of applied electrochemistry 26 (1996), S. 673-678 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The oxidants, hydrogen peroxide and hypochlorite, were generated by the cathodic reduction of oxygen and anodic oxidation of chloride ion in a paired electrolysis process and used for phenol degradation. The degradation of phenol with electrogenerated hydrogen peroxide was slightly affected by pH and ferrous ion concentration. The oxidative degradation of phenol with paired electrogenerated hydrogen peroxide and hypochlorite was significantly affected by phenol concentration. In comparison with the cathodic and anodic degradation of phenol, the removal of phenol increased by 56.1 and 178.1%, respectively, in the case of paired electrooxidative phenol degradation. The COD decreased from 3222 and 3222 ppm to 2253 and 2746 ppm in the anodic and cathodic compartments when the charge passed increased from 0 to 2500C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253467
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  • 4
    Electronic Resource
    Electronic Resource
    Mass transfer and current efficiency for the electrodeposition of silver in fluorosilicic acid solution (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 827-834 
    Details
    ISSN: 1572-8838
    Keywords: current efficiency ; electrodeposition ; fluorosilicic acid ; mass transfer ; silver
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The stripping and electrodeposition of silver in fluorosilicic acid solution are irreversible reactions as indicated by cyclic voltammetry. The rate constant for the intrinsic heterogeneous cathodic deposition of silver was obtained as k C 0 =40.77 exp(1.88−29.43 E C 0′ ) and the diffusion coefficient of the silver ion in fluorosilicic acid solution as 5.17×10−5 cm2 s−1. Theoretical calculations of the concentration of silver ion correlated well with experimental data. The relationship between the diffusion layer thickness and the stirring rate was also obtained. Increasing the stirring rate and temperature, and decreasing the current density and concentration of fluorosilicic acid, caused an increase in the current efficiency for silver deposition on graphite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003646119602
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