In this study, the optimum conditions and the synergistic effects of TiO₂/chitosan/glycerol photocatalyst (TCGB) in color and COD removal from Azo dye and a secondary effluent of dyeing and textile wastewater were investigated. In order to optimize conditions of the dye photocatalytic degradation of TCGB, acid blue 193 (AB 193) was used as an indicator for experiments based on statistical methods developed by Taguchi and ANOVA analysis. The optimum conditions for AB 193 degradation were TiO₂/chitosan ratio of 2% (w/w), irradiation time of 90 min at pH 4.5, initial dye concentration of 10 mg/L and TCGB loading of 0.2 g/mL. The polynomial regression model of AB regression was performed with R squared of 93.33%. After optimizing, the photocatalytic experiments with the real secondary effluent were carried out. In the presence of glycerol in TiO₂/chitosan beads significantly enhanced the color degradation yield of AB193 (85%) and secondary effluent (72%) under the optimal parameters. The synergistic rate of TCGB compared to separate part (chitosan, TiO₂, glycerol) were 60%–120% and 70%–105% for AB193 removal and secondary effluent, respectively. A kinetic study of photocatalytic degradation of TCGB composite on various initial AB193 concentrations was found to fit with the pseudo-first-order model.

本研究探讨了TiO ₂ /壳聚糖/甘油光催化剂（TCGB）在偶氮染料以及印染和纺织废水的二次流出物中脱色和COD去除的最佳条件和协同作用。为了优化染料的光催化降解TCGB的条件，基于Taguchi和ANOVA分析开发的统计方法，酸性蓝193（AB 193）被用作实验的指示剂。AB 193降解的最佳条件是TiO ₂/壳聚糖比率为2％（w / w），在pH 4.5下的照射时间为90分钟，初始染料浓度为10 mg / L，TCGB负载为0.2 g / mL。AB回归的多项式回归模型的R平方为93.33％。优化后，使用实际的二级废水进行了光催化实验。在最佳参数下，在TiO ₂ /壳聚糖珠中存在甘油的情况下，AB193（85％）和二次流出物（72％）的颜色降解率显着提高。TCGB与单独部分（壳聚糖，TiO ₂相比）的协同速率（甘油）分别去除AB193和二级废水的比例为60％–120％和70％–105％。发现在各种初始AB193浓度下TCGB复合材料的光催化降解动力学研究符合拟一阶模型。