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KMID : 1171820050200040051
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Journal of Environmental and Sanitary Engineering
2005 Volume.20 No. 4 p.51 ~ p.58
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Effect of Removal Efficiency of Formaldehyde by Input Coating Concentration of Photocatalyst - with Study of Standardization of Coating Thickness -
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Park Young-Gyu
Han Man-So
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Abstract
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Photocatalytic degradation using TiO₂ particles suspended in a reactor was experimentally performed to degrade the formaldehyde of indoor pollutants. Exponential increase of degradation appears to prove light availability due to the scattering of UV light by particles themselves. Comparative removal studies of formaldehyde were done in both cases of dipping and spraying immobilized techniques of TiO₂ particles suspended in solution. Experiments were performed under several different experimental conditions such as initial concentration of formaldehyde, UV intensity and concentration of photocatalysts. Optimal conditions to degrade formaldehyde were obtained under the conditions of 30 ㎎/㎠ concentration of catalyst and UV intensity of 30 Watt at the distance of 30 ㎝ using immobilized technique by dipping coating.
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KEYWORD
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UV light, photocatalyst, formaldehyde, indoor pollutant
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