Electrochemical cell current requirements for toxic organic waste destruction in Ce(IV)-mediated electrochemical oxidation process

2007 ◽  
Vol 24 (5) ◽  
pp. 749-756 ◽  
Author(s):  
Vasily V. Kokovkin ◽  
Sang Joon Chung ◽  
Subramanian Balaji ◽  
Manickam Matheswaran ◽  
Il-Shik Moon
Keyword(s):  
Electrochemical Oxidation ◽  
Organic Waste ◽  
Oxidation Process ◽  
Electrochemical Cell ◽  
Mediated Electrochemical Oxidation ◽  
Cell Current ◽  
Waste Destruction

Preliminary studies using hybrid mediated electrochemical oxidation (HMEO) for the removal of persistent organic pollutants (POPs)

2007 ◽  
Vol 55 (1-2) ◽  
pp. 261-266 ◽  
Author(s):  
S.J. Chung ◽  
S. Balaji ◽  
M. Matheswaran ◽  
T. Ramesh ◽  
I.S. Moon
Keyword(s):  
Organic Carbon ◽  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Organic Pollutants ◽  
Persistent Organic Pollutants ◽  
Oxidation Process ◽  
Electrochemical Cell ◽  
Ethylenediaminetetraacetic Acid ◽  
Mediated Electrochemical Oxidation ◽  
Organic Destruction

This study investigates the hybrid mediated electrochemical oxidation (HMEO) technology, which is a newly developed non thermal electrochemical oxidation process for organic destruction. A combination of ozone and ultrasonication processes to the mediated electrochemical oxidation (MEO) process is termed as hybrid mediated electrochemical oxidation. The electrochemical cell was developed in this laboratory. In the present study, several organic compounds, such as phenol, benzoquinone and ethylenediaminetetraacetic acid (EDTA), were chosen as the model organic pollutants to be destructed by the hybrid process. The organic destruction was monitored based on the CO2 generation and total organic carbon (TOC) reduction. The HMEO process was found to be extremely effective in the destruction of all the target organics chosen in this study. The information obtained from this study will provide an insight in adopting this technique for dealing with more recalcitrant organics (POPs).

Electrochemical Oxidation of Ce(III) to Ce(IV) in Mixed Acid (H2SO4 and CH3SO3H)

2012 ◽  
Vol 588-589 ◽  
pp. 90-94 ◽  
Author(s):  
Hua Li Zhao ◽  
Qun Chu You ◽  
An Ma Chun
Keyword(s):  
Electrochemical Oxidation ◽  
Oxidation Process ◽  
Electrochemical Impedance ◽  
Methanesulfonic Acid ◽  
Electrode Polarization ◽  
Acid Electrolyte ◽  
Pt Electrode ◽  
Electrochemical Behaviors ◽  
Mixed Acid ◽  
Mediated Electrochemical Oxidation

Electrochemical behaviors of Ce3+/Ce4+ couple in mixed acid (H2SO4 and CH3SO3H) were investigated on Pt electrode. Polarization curves and electrochemical impedance spectroscopy (EIS) were used to optimize mixed acid composition, and the mixed acid consisting of 1.0 M methanesulfonic acid (MSA) and 0.8 M sulfuric acid is singled out as the optimum electrolyte. Subsequently, the effects of current density and electrolyte temperature on the electrochemical oxidation of Ce3+ to Ce4+ were researched. A 92.2% current efficiency was achieved at 40 mA•cm-2 in cerium (III) solution with the optimum mixed acid electrolyte above at 313 K. It can satisfy the application of mediated electrochemical oxidation process with Ce3+/Ce4+ mediator.

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