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KMID : 1156220050310050415
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Journal of Environmental Health Sciences
2005 Volume.31 No. 5 p.415 ~ p.422
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Decolorization of Dye Using Immobilized Photocatalyst onto Sponge
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Kim Dong-Seog
Park Young-Seek
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Abstract
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The photocatalytic decolorization of Reactive Red 2B(RR2B) was studied using immobilized photocatalyst/UV System. Two pairs of 20 W UV-B and UV-C lamps were employed as the light source. Immobilization of TiO₂ was carried out using sponge (as the photocatalyst body) and silicone sealant(as the binder). The effects of parameters such as the thickness, pore size of sponge photocatalyst and attached material on the reactor bottom were investigated. The results showed that the optimum thickness of sponge photocatalyst was 1 cm. Decolorization of reactor which had the bottom coated TiO₂ was higher than that of reactor attached aluminum plate. Decolorization of photocatalyst with large pore size (mean pore size, 3.8 mm) was higher than that of the small(mean pore size, 1.75 mm). Initial decolorization of RR2B could be descrived using the Langmuir- Hinshelwood (L-H) model and gave constant values of 0.55 mg/l·min (k) and 2.65 × 10^(-2) l/mg (K), respectively.
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