광촉매를 이용한 Humic Acid 광분해시 공존물질이 광분해에 미치는 영향 = The Influence of Coexisting Material on the Photocatalytic Removal of Humic Acid

다국어 초록 (Multilingual Abstract)

This study aimed at improving the TiO₂ photocatalytic degradation of HA. A set of tests was first conducted in the dark to study the adsorption of HA at different coexisting material concentration. Adsorption rate increased with adding cation ion but decreased with adding bicarbonate ion.
The photodegradation of HA in the presence of UV irradiation was investigated as a function of different experimental condition : initial concentration of HA, TiO₂ weight, pH, air flow rate and coexisting material. It was increased either at low pH or by adding cation ion. The increase of cation strength in aqueous solution could provide a favorable condition for adsorption of HA on the TiO₂ surface and therefore enhance the photodegradation rate. It was found that bicarbonate ions slowed down the degradation rate by scavening the hydroxyl radicals.

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