Performance of carbon-ceramic composite electrode was investigated for degradating of
Remazol black B dye on indirect electrochemical oxidation reactor. Carbon-ceramic composite
electrode was prepared by mixing alumina, kaolin and liquid clay with carbon addition as a
conductive phase. The electrode was casted in stainless steel mold and then sintered at 900
degree Celsius in a vacuum furnace for 7 h. The surface morphology, crystalline phase and
electrical conductivity of the carbon-ceramic composite electrodes were investigated. The
electrode with a highest electrical conductivity was applied on indirect electrochemical oxidation
reactor for degradating Remazol black B. The operational parameters investigated included
the infl uence of initial pH, electrolyte concentration and dye concentration on color removal
effi ciency. The research revealed that the electrical conductivity of carbon-ceramic composite
electrode with addition of 30% carbon was 5.04 S/cm. The color removal effi ciency of Remazol
black B on the reactor using this electrode was 87.75% for 60 min. of electrolysis time with
an applied voltage of 12 V, at pH 6, with the addition of 3 g table salt per liter of waste and
dye concentration of 100 mg/L. This study indicates that carbon-ceramic composite electrode
is prospective to be used as an electrode on electrochemical cells for wastewater treatment.
Keywords
Carbon-ceramic composite electrode; Electrical conductivity; Indirect electrochemical oxidation; Color removal effi ciency; Remazol black B textile dye
ENIVRONMENT ASIA
Published by : Thai Society of Higher Education Institutes on Environment Contributions welcome at : http://www.tshe.org/en/
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