The main purpose of this study is to optimize the applicability of TiO₂ nanoparticles for paper mill and pulp wastewater treatment under solar irradiation using response surface methodology, provided by the software package DOE. The principle independent parameters were TiO₂ loading, pH, time and H₂O₂ concentration, and COD removal efficiency was chosen as desire response. To evaluate the influence of the parameters on the outputs, the quadratic formulation was applied and for determining the validation of developed models analysis of variance was utilized. The results represented the greatest COD removal was achieved 82%, approximately at pH of 8.1, TiO₂ fraction of 0.83 g/L, H₂O₂ concentration of 2.4 ml/L and the contact time of 196 min.

这项研究的主要目的是使用软件包DOE提供的响应面方法优化TiO ₂纳米粒子在太阳辐射下用于造纸和纸浆废水处理的适用性。原则上独立的参数是TiO _2的负载量，pH，时间和H ₂ O _2的浓度，并选择COD去除效率作为期望的响应。为了评估参数对输出的影响，应用了二次公式，并使用方差分析确定开发模型的有效性。结果表明最大的COD去除率达到82％，大约在pH值为8.1，TiO ₂分数为0.83 g / L，H ₂ O的情况下₂浓度为2.4 ml / L，接触时间为196分钟。