WO3/H2O2光催化氧化法处理草浆纸厂废水的研究

讨论了光催化氧化处理造纸废水的影响因素,如催化剂的用量、pH值、过氧化氢的用量、光照时间等,并通过正交试验,得出了WO3作为光催化剂处理草浆废水时的影响因素次序是:H2O2的用量＞WO3的用量＞光照时间＞pH值.确定了反应最佳工艺条件为:pH=6.00,H2O2加入量为0.24 mL,WO3用量为3g/L,光照时间为4 h,出水COD值达到排放标准.同时通过对造纸废水光催化氧化动力学级数的研究发现,光催化技术处理造纸废水的反应符合一级反应动力学.

Effect factors and kinetics on photocatalysis treating pulp wastewater by WO3 catalyst

The paper aims to introduce the authors' study on the factors influencing photocatalysis oxidation process, such as the amount of photocatalyst, dosage of H_2O_2, pH value, illuminating time etc. for such factors are intricate and interrelated and therefore proves to be the preconditions to the industrial application. As a matter of fact, orthogonal experimental method helps to find the order of main influential factors of photocatalysis when pulp and paper effluent are treated. The paper also studied the dynamic nature of the reaction. The result shows that the amount of H_2O_2 is the best domain factor, with the amount of WO_3, the radiant time, and the pH value followed. The experimental data help to find the optimal conditions as follows: pH value should be 6.00, the amount of catalyst is 0.03 g, with the dosage of H_2O_2 being 0.24 mL and illumination time 4 h. In addition, the dynamics of this reaction is a single order reaction. The conclusion is in conformity with the photocatalysis oxidation in simulated treating of single component wastewater.