| Title |
Characteristics of Phenol Degradation by using UV/TiO2 Photocatalysis |
| Authors |
신인수 ( In Soo Shin ) ; 최봉종 ( Bong Jong Choi ) ; 이승목 ( Seung Mok Lee ) |
| Keywords |
Photocatalysis; Chemical oxidation; UV; TiO2; Phenol; Wastewater treatment |
| Abstract |
The effects were examined from several conditions of TiO₂ photocatalysis reaction to phenols degradation by changing its reacting conditions such as phenol concentration, pH, TiO₂ concentration, H₂O₂ concentration, flow rate, and intensity of ultraviolet rays. Phenol degradation was more efficient in low concentration of phenol, neutral pH. Phenol degradation appeared to increase as concentration of TiO₂ photocatalyst, that of H₂O₂ and intensity of ultraviolet rays increased. As TiO₂ dosage increased, initial rate constant k linearly increased. When H₂O₂ was injected more than optimum, phenol removal rate didn`t increase in proportional to the change of H₂O₂ concentration as OH radicals was being consumed. When flow rate is less than 4.75 m³/m²?day, phenol removal efficiency appeared to decrease as ultraviolet rays transmission rate becomes low by TiO₂ suspension coated in photo reaction column. Meanwhile, initial rate constant according to light intensity change in less than 25mW/㎠ appeared to be in proportion to light intensity (mW/㎠). Removal efficiency decreased about 12% after 180 minutes of reaction time while showed stable removal efficiency of 100% after 300 minutes when using regenerated TiO₂. |