
TiO₂를 이용한 Humic Acid의 광촉매분해에 대한 영향인자에 관한 연구
A Study on the Factors of the Photocatalytic Degradation of Humic Acid Using TiO₂
- 김현용(Hyun Yong Kim) 조일형(Il Hyoung Cho) 이홍근(Hong Keun Lee)
- 한국환경보건학회
- 1. 한국환경보건학회지
- 제25권 제2호
- 등재여부 : KCI우수등재
- 1999.06
- 26 - 30 (5 pages)
The photocatalytic degradation of humic acid which is precursor of trihalomethanes (THMs) formed after chlorination was carried out in aqueous suspensions of TiO₂ as photocatalyst by illumination with UV light. Comparison of UV photolysis, TiO₂ adsorption and UV/TiO₂ phtocatalysis as well as the effect of reaction conditions such as UV intensity, TiO₂ dosage and H₂O₂ concentration on the degradation of humic acid was examined. The major results of this study were as follows: 1. With both UV illumination and TiO₂ present, humic acid was more effectively degraded than UV or TiO₂ alone and degradation efficiency of humic acid by Photocatalysis was 76.2%. 2. Photocatalytic Degradation of humic acid increased linearly with increasing UV light intensity. 3. Degradation efficiency of humic acid increased with increasing TiO₂ dosage. However, over 2 gll of TiO₂ dosage, the efficiency was limited because UV light is blocked by catalyst itself. 4. Addition of H₂O₂ as oxidant enhanced the efficiency of photocatalytic degradation on humic acid but the degradation efficiency reached a plateau over 500 mgll of H₂O₂
I. 서론
II. 재료 및 방법
III. 결과 및 고찰
IV. 결론