PPFS／H2O2耦合工艺处理直接深棕废水的研究

摘要

采用一种新工艺合成聚磷硫酸铁（ PPFS），并与H2 O2联用，设计出PPFS/H2 O2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nPO3-4Fe3＋，可以提高PPFS对直接深棕色度去除率，在此基础上投加适量H2 O2，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H2 O2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 PO3-4 Fe3+.Also, the results showed that the addition of H 2 O2 facilitated the degradation of Direct Dark Brown MM, which was caused by the generated Fenton -like process with H2 O2 and Fe3+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.