PPFS/H_2O_2耦合工艺处理直接深棕废水的研究

Study on the Effect of PPFS Combined with H_2O_2 to Treat Wastewater

采用一种新工艺合成聚磷硫酸铁(PPFS),并与H2O2联用,设计出PPFS/H2O2混凝-氧化耦合工艺。从单因素试验分析可知,选择合适的投加量和合适的nPO3-4/nFe3+,可以提高PPFS对直接深棕色度去除率,在此基础上投加适量H2O2,使其与混凝后水体中残余的Fe3+构成类Fenton体系,进一步降低混凝反应后残余的有机物,达到更好的处理效果,PPFS与H2O2的联合使用,可以大大拓宽它们pH值的应用范围。

A new method for the preparation of polymeric phosphate ferric sulfate （ PPES ） and effect of PPFS combined with H2 O2 to treat wastewater were studied.PPFS/H2 O2 coupled flocculation and oxidation process of Direct Dark Brown MM：based on single factor experiments , the degradation degree of Direct Dark Brown MM were enhanced significantly under the optimum dosage and n PO^3-4 /nFe^3＋.Also, the results showed that the addition of H2O2 facilitated the degradation of Direct Dark Brown MM, which was caused by the generated Fenton -like process with H2O2 and Fe^3＋after flocculation.The results showed that in an acidic environment , Fenton -like mechanism played a key role.On the contrary , the flocculation mechanism would do in the alkaline environment.Therefore, the pH range would be greatly extended using PPFS/H2 O2 coupled flocculation and oxidation process.