UV/H_2O_2, UV/TiO_2 시스템에서 염료의 색도 및 COD 제거 = Elimination of COD and Color of Dye by UV/H_2O_2, UV/TiO_2 System

다국어 초록 (Multilingual Abstract)

The Photocatalytic decolorization and degradation of commercial dyes were studied using
a batch reactor. Degussa P25 titanium dioxide and H_2O_2 were used as the photocatalyst
and proved to be effective for dyes degradation when they were irradiated with UV light.
The light source was a 20W low pressure mercury lamp. Three different kinds of dyes,
such as direct dye(congo red), acid dye(acid black) and disperse dye(disperse blue) were
tested. Extending the UV only treatment up to 120min, direct dye was decolorized to 60%
and degraded to 30% as COD. On the other side, acid and disperse dyes were eliminated
less than 10% as color and COD. But, color and COD were eliminated about 90% for all of
the three dyes by UV/H_2O_2 system. And then the most effective decolorization was done
for direct dye with 96% removal efficiency by UV/TiO_2 system at 120min 500mg/L of
TiO_2.