改性Fenton试剂法氧化降解染色废水及其工艺优化

Treatment and Process Optimization on Dyeing Wastewater by Modified-Fenton Process

文章为了克服均相Fenton催化剂难以分离的缺点,采用羟基铁粉取代二价铁制成改性Fenton试剂,并使用改性Fenton试剂处理染色废水。探讨反应温度、反应时间、溶液pH值及羟基铁粉的用量等因素对处理效果的影响,并通过分析氧化降解前后染色废水溶液紫外-可见光谱曲线和COD值的变化情况来确定改性Fenton试剂处理染色废水的最佳工艺条件。根据实验结果得知最佳反应条件为:反应温度为室温,反应时间为30min^40min,溶液pH值为2~3,羟基铁粉的用量为1.0g。

In order to overcome the difficulty of separating homogeneous Fenton catalyst, modi-fied Fenton reagent was made by replacing Fe^2＋ with hydroxyl iron powder, and modified Fenton rea-gent was used for the treatment of dyeing wastewater in this paper. Parameters, such as reaction tem-perature？ reaction time？ pH value and dosage of hydroxy iron powder on the treatment efficiency were investigated. By analyzing the change of UV-Vis Spectrum and COD value of dyeing wastewater be-fore and after oxidation degradation, the optimal reaction conditions of Fenton reagent for the treat-ment of dyeing wastewater were determined. According to the experimental results, the optimal reac-tion parameters are as follows： reaction temperature was room temperature, reaction time was 30 min-40 min, the pH value was 2-3, and the dosage of hydroxyl iron powder was 1. 0 g.