光催化氧化法处理造纸废液研究

以高压汞灯作光源、锐钛矿型TiO2为催化剂，开展了光催化氧化法降解造纸废液的试验研究，考察了TiO2投量、H2O2投量、pH值、反应时间等因素对降解效果的影响。试验表明：25mL的废液在Ti02投量为0．3g、3％的H2O2投量为4mL、pH=12．5的条件下，于室温下光照2h后对COD的去除率和脱色率分别达到了60％和90％，即采用光催化氧化法处理造纸废液是有效的。

Photocatalytic Oxidation Process for Treatment of Wastewater from Paper-making Mill

Study was conducted on degradation of wastewater from paper-making mill by photocatalytic oxidation with high pressure mercury pump as light source and TiO_2 (anatase), and investigation was made on the factors such as TiO_2 and H_2O_2 dosage, pH value, reaction time affecting the degradation. The study shows that under the conditions of TiO_2 dosage 0.3 g, 3% H_2O_2 dosage 4 mL per 25 mL wastewater, and pH 12.5, the removal rate of COD and color is 60% and 90% respectively after radiation for 2 h at room temperature. It proves that the process is efficient in treatment of wastewater from paper-making mill.