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Degradation of THM precursor using $TiO_2$ photocatalytic oxidation in the water treatment processes  

Cho Deok-Hee (성남시 상하수도사업소)
Seo Su-Man (성남시 상하수도사업소)
Publication Information
Journal of environmental and Sanitary engineering / v.19, no.2, 2004 , pp. 1-6 More about this Journal
Abstract
In Bok-Jeong water treatment plant, chlorination is the only technique used for disinfection of drinking water. This disinfecting treatment leads to the formation of trihalomethanes (THMs). This study was carried out to investigate the possibility of improving removal efficiency of THM precursor in the conventional water treatment processes by $TiO_2$ photocatalytic oxidation. Removal efficiencies of DOC, $UV_{254}$, THMFP were low in the conventional water treatment processes. With application of $TiO_2$ photocatalyst, DOC, $UV_{254}$, THMFP were reduced more effectively. As the $TiO_2$ photocatalytic reaction time increased, the removal efficiencies of DOC, $UV_{254}$, THMFP were increased. The $TiO_2$ photocatalytic removal efficiencies of DOC, $UV_{254}$, THMFP were increased with increasing $TiO_2$ dosage. However, over 0.6g/l of $TiO_2$ dosage, the efficiency reached a plateau.
Keywords
$TiO_2$ photocatalyst; THM precursor; DOC; $UV_{254}$; THMFP; oxidation;
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